WO2025039452A1 - Air conditioner - Google Patents

Abstract

Provided is an air conditioner. The air conditioner comprises an outdoor unit and an indoor unit. The indoor unit is connected to the outdoor unit. The indoor unit comprises a first housing, a heat exchanger, a first fan, a second housing, a second fan, a first pipeline, and a connecting part. The first housing comprises a heat exchange space, a first air inlet, and a first air outlet. The first fan is arranged in the heat exchange space. A heat exchange airflow is adapted to enter the heat exchange space through the first air inlet, be heat-exchanged by the heat exchanger, and then be output from the first air outlet. The second housing is arranged in the first housing, and comprises a first air guide port. The first pipeline is arranged in the first housing, and comprises a second air guide port. The connecting part is located between the second housing and the first pipeline, and is connected to the second housing and the first pipeline, respectively.

Description

Air Conditioner

This application claims the priority of the Chinese patent application with application number 202322697597.7 filed on October 9, 2023; and the priority of the Chinese patent application with application number 202322260077.X filed on August 22, 2023; the entire contents of which are incorporated by reference into this application.

Technical Field

The present disclosure relates to the technical field of air conditioning, and in particular to an air conditioner.

Background Art

With the advancement of science and technology and the improvement of people's living standards, air conditioners have gradually entered people's lives and become an indispensable item in people's work and life.

The split air conditioner includes an indoor unit and an outdoor unit. The indoor unit and the outdoor unit are installed indoors and outdoors respectively, and the two are connected by corresponding pipes and wires.

Summary of the invention

An air conditioner is provided. The air conditioner includes an outdoor unit and an indoor unit. The indoor unit is connected to the outdoor unit. The indoor unit includes a first shell, a heat exchanger, a first fan, a second shell, a second fan, a first pipeline and a connection portion. The first shell includes a heat exchange space, a first air inlet and a first air outlet. The heat exchange space is connected to the first air inlet and the first air outlet. The heat exchanger is arranged in the heat exchange space and is configured to heat the air passing through the heat exchanger to form a heat exchange airflow. The first fan is arranged in the heat exchange space, and the heat exchange airflow is suitable for entering the heat exchange space through the first air inlet and being output from the first air outlet after being heat exchanged by the heat exchanger. The second shell is arranged in the first shell and includes a first air guide port. The second fan is arranged in the second shell. The first pipeline is arranged in the first shell and includes a second air guide port, and the first pipeline is connected to the second shell. The connection portion is located between the second shell and the first pipeline, and is respectively connected to the second shell and the first pipeline. The first duct also includes a first duct body, at least one first air guide, at least one second air outlet and at least one first cavity, wherein the at least one second air outlet is arranged on one side of the first duct body, and the first cavity connects the second air guide and the second air outlet.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG1 is a structural diagram of an air conditioner according to some embodiments;

FIG2 is a structural diagram of an indoor unit according to some embodiments;

FIG3 is a structural diagram of another indoor unit according to some embodiments;

FIG4 is a structural diagram of another indoor unit according to some embodiments;

FIG5 is a cross-sectional view of an indoor unit according to some embodiments;

FIG6 is an exploded view of an indoor unit according to some embodiments;

FIG7 is a structural diagram of a second housing and a first pipe according to some embodiments;

FIG8 is a structural diagram of a second housing according to some embodiments;

FIG9 is another structural diagram of an indoor unit with a cover removed according to some embodiments;

FIG10 is another structural diagram of the second housing and the first pipe according to some embodiments;

FIG11 is another structural diagram of the second housing and the first pipe according to some embodiments;

FIG12 is an exploded view of a second housing according to some embodiments;

FIG13 is a block diagram of a first pipeline according to some embodiments;

FIG14 is a partial enlarged view of the circle A in FIG13;

FIG15 is a cross-sectional view of an indoor unit according to some embodiments;

FIG16 is another cross-sectional view of an indoor unit according to some embodiments;

FIG17 is a structural diagram of a second housing according to some embodiments;

FIG18 is a partial enlarged view of the circle B in FIG17;

FIG19 is a cross-sectional view of another indoor unit according to some embodiments;

FIG20 is a structural diagram of yet another indoor unit according to some embodiments;

FIG. 21 is a partial enlarged view of circle C in FIG. 20 .

DETAILED DESCRIPTION

The following will be combined with the accompanying drawings to clearly and completely describe some embodiments of the present disclosure. Obviously, the described embodiments are only part of the embodiments of the present disclosure, rather than all the embodiments. Based on the embodiments provided by the present disclosure, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present disclosure.

Unless the context requires otherwise, throughout the specification and claims, the term "comprise" and other forms thereof, such as the third person singular form "comprises" and the present participle form "comprising", are to be interpreted as open, inclusive, that is, "including, but not limited to". In the description of the specification, the terms "one embodiment", "some embodiments", "exemplary embodiments", "example", "specific example" or "some examples" and the like are intended to indicate that specific features, structures, materials or characteristics associated with the embodiment or example are included in at least one embodiment or example of the present disclosure. The schematic representation of the above terms does not necessarily refer to the same embodiment or example. In addition, the specific features, structures, materials or characteristics described may be included in any one or more embodiments or examples in any appropriate manner.

In the following, the terms "first" and "second" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the embodiments of the present disclosure, unless otherwise specified, "plurality" means two or more.

When describing some embodiments, the expressions "coupled" and "connected" and their derivatives may be used. The term "connected" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. The term "coupled" indicates that two or more components are in direct physical or electrical contact. The term "coupled" or "communicatively coupled" may also refer to two or more components that are not in direct contact with each other, but still cooperate or interact with each other. The embodiments disclosed herein are not necessarily limited to the contents of this document.

“At least one of A, B, and C” has the same meaning as “at least one of A, B, or C” and both include the following combinations of A, B, and C: A only, B only, C only, the combination of A and B, the combination of A and C, the combination of B and C, and the combination of A, B, and C.

“A and/or B” includes the following three combinations: A only, B only, and a combination of A and B.

The use of "adapted to" or "configured to" herein is meant to be open and inclusive language that does not exclude devices adapted or configured to perform additional tasks or steps.

As used herein, "about," "substantially," or "approximately" includes the stated value and an average value that is within an acceptable range of variation from the particular value as determined by one of ordinary skill in the art taking into account the measurements in question and the errors associated with the measurement of the particular quantity (i.e., the limitations of the measurement system).

As used herein, "parallel", "perpendicular", and "equal" include the situations described and situations similar to the situations described, and the range of the similar situations is within the acceptable deviation range, wherein the acceptable deviation range is determined by a person of ordinary skill in the art taking into account the measurement in question and the errors associated with the measurement of a particular quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, wherein the acceptable deviation range of approximate parallelism can be, for example, a deviation within 5°; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, wherein the acceptable deviation range of approximate perpendicularity can also be, for example, a deviation within 5°. "Equal" includes absolute equality and approximate equality, wherein the acceptable deviation range of approximate equality can be, for example, the difference between the two equalities is less than or equal to 5% of either one.

Some embodiments of the present disclosure provide an air conditioner 1000 .

1 , the air conditioner 1000 includes an indoor unit 1 and an outdoor unit 2. The indoor unit 1 and the outdoor unit 2 are connected by a pipeline to transmit refrigerant. The indoor unit 1 includes an indoor heat exchanger and a first fan). The outdoor unit 2 includes a compressor, a four-way valve, an outdoor heat exchanger, an outdoor fan and an expansion valve. The compressor, the outdoor heat exchanger, the expansion valve and the indoor heat exchanger connected in sequence form a refrigerant circuit, in which the refrigerant circulates and exchanges heat with the air through the outdoor heat exchanger and the indoor heat exchanger, respectively, to realize different modes of the air conditioner 1000, such as cooling mode, heating mode, fresh air mode, dehumidification mode, etc.

Here, the first blower includes a first fan and a first motor, and the first motor is configured to drive the first fan to rotate. The external fan includes a second fan and a second motor, and the second motor is configured to drive the second fan to rotate.

The compressor is configured to compress the refrigerant so that the low-pressure refrigerant is compressed to form a high-pressure refrigerant.

The outdoor heat exchanger is configured to perform heat exchange between outdoor air and the refrigerant transmitted in the outdoor heat exchanger. For example, the outdoor heat exchanger works as a condenser in the cooling mode of the air conditioner 1000, so that the refrigerant compressed by the compressor condenses by dissipating heat to the outdoor air through the outdoor heat exchanger. The outdoor heat exchanger works as an evaporator in the heating mode of the air conditioner 1000, so that the decompressed refrigerant absorbs the heat of the outdoor air through the outdoor heat exchanger and evaporates.

The outdoor heat exchanger also includes heat exchange fins to expand the contact area between the outdoor air and the refrigerant transmitted in the outdoor heat exchanger, thereby improving the heat exchange efficiency between the outdoor air and the refrigerant.

The expansion valve is connected between the outdoor heat exchanger and the indoor heat exchanger. The opening of the expansion valve adjusts the pressure of the refrigerant flowing through the outdoor heat exchanger and the indoor heat exchanger to adjust the flow of the refrigerant flowing between the outdoor heat exchanger and the indoor heat exchanger. The flow and pressure of the refrigerant flowing between the outdoor heat exchanger and the indoor heat exchanger will affect the heat exchange performance of the outdoor heat exchanger and the indoor heat exchanger. The expansion valve can be an electronic expansion valve. The opening of the expansion valve is adjustable to control the flow and pressure of the refrigerant flowing through the expansion valve.

The four-way valve is connected to the refrigerant circuit, and is configured to switch the flow direction of the refrigerant in the refrigerant circuit so that the air conditioner 1000 can execute different modes.

The indoor heat exchanger is configured to perform heat exchange between indoor air and the refrigerant transmitted in the indoor heat exchanger. For example, the indoor heat exchanger works as an evaporator in the cooling mode of the air conditioner 1000, so that the refrigerant after heat dissipation through the outdoor heat exchanger absorbs the heat of the indoor air through the indoor heat exchanger and evaporates. The indoor heat exchanger works as a condenser in the heating mode of the air conditioner 1000, so that the refrigerant after heat absorption through the outdoor heat exchanger dissipates the heat to the indoor air through the indoor heat exchanger and condenses.

The outdoor fan is configured to draw outdoor air into the outdoor unit 2 through the outdoor air inlet of the outdoor unit 2, and send the outdoor air after heat exchange with the outdoor heat exchanger out through the outdoor air outlet of the outdoor unit 2. The outdoor fan provides power for the flow of outdoor air.

In some embodiments, the air conditioner further comprises a fresh air device, and the fresh air device comprises a fresh air duct. The air conditioner continuously introduces outdoor fresh air into the room through the fresh air duct, thereby improving the indoor air quality and creating an indoor environment.

In the related art, the fresh air duct of the indoor unit 1 of the air conditioner is generally installed at the top of the indoor unit 1. The fresh air duct includes a fresh air outlet, and the fresh air is discharged from the top of the indoor unit 1, resulting in poor visibility of the fresh air outlet, small fresh air outlet volume, and uneven air outlet.

If the fresh air duct is arranged on the front side of the indoor unit 1, the user's demand for visualization of the fresh air outlet can be met. And the air outlet of the fresh air device of the indoor unit 1 generally adopts the natural extension line of the logarithmic spiral or a straight line for air outlet. However, since condensed water will be generated in the fresh air duct, it is necessary to guide the generated condensed water into the water receiving tray. Therefore, the height of the fresh air duct should be located above the water receiving tray. The height of the air outlet of the fresh air device and the height of the air inlet of the fresh air duct are often not at the same level, resulting in resistance when the fresh air enters the fresh air duct, and then the loss of fresh air volume, which cannot meet the demand for large fresh air volume outlet, and there is also the problem of uneven fresh air outlet of the fresh air duct. It still cannot improve the small fresh air volume and large fresh air loss, and the outdoor fresh air cannot quickly ventilate the indoor space, resulting in large power consumption of fresh air exhaust and low fresh air efficiency.

In the related art, in order to solve the above technical problems, the fresh air duct is usually arranged on the side of the indoor unit 1 close to the user (such as the front side) to meet the user's demand for visualization of the fresh air outlet. The air outlet of the fresh air device of the indoor unit 1 generally adopts the natural extension line of the logarithmic spiral line or a straight line to discharge air.

However, since condensed water is generated in the fresh air duct, it is necessary to guide the generated condensed water into the water receiving tray. Therefore, the height of the fresh air duct should be located above the water receiving tray. The height of the air outlet of the fresh air device and the height of the air inlet of the fresh air duct are often not at the same level, resulting in resistance when the fresh air enters the fresh air duct, and then the loss of fresh air volume, which cannot meet the demand for large fresh air volume outlet, and there is also the problem of uneven fresh air outlet in the fresh air duct. It still cannot improve the small fresh air volume outlet, large fresh air loss, and the outdoor fresh air cannot quickly ventilate the indoor space, resulting in large power consumption of fresh air exhaust and low fresh air efficiency.

In order to solve the above technical problems, some embodiments of the present disclosure provide an air conditioner 1000. Referring to Figures 9 and 10, by providing a connecting portion 300 between the second housing 200 and the first duct 400, it is helpful to reduce the loss in the transportation of fresh air, thereby increasing the air volume of the fresh air. In addition, by providing a plurality of first air guides 410 in the first duct 400, the fresh air can be discharged more evenly.

In some embodiments of the present disclosure, the air conditioner 1000 includes the above-mentioned compressor, condenser, expansion valve, evaporator, etc., which will not be described in detail here.

The outdoor unit 2 of the air conditioner 1000 refers to a part of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit 1 of the air conditioner 1000 includes an indoor heat exchanger, and the expansion valve may be provided in the indoor unit 1 or the outdoor unit 2 .

The indoor heat exchanger and the outdoor heat exchanger function as a condenser or an evaporator. When the indoor heat exchanger functions as a condenser, the air conditioner 1000 functions as a heater in a heating mode, and when the indoor heat exchanger functions as an evaporator, the air conditioner 1000 functions as a cooler in a cooling mode.

2 and 4, in some embodiments, the indoor unit 1 includes a first housing 100. The first housing 100 includes a first housing body, a first air inlet 120 (such as an indoor air inlet) and a first air outlet 130 (such as an indoor air outlet). The first air inlet 120 is provided on one side of the first housing body. For example, the first air inlet 120 can be provided at the top of the first housing body.

A first air outlet 130 is provided on one side of the first shell body. For example, referring to FIG. 3 , the first air outlet 130 may be provided on the front side of the first shell body. Alternatively, the first air outlet 130 may also be provided at the bottom of the first shell body. Alternatively, the first air outlet 130 may also be provided at an angle to the first shell body.

It should be noted that the first air outlet 130 forms an obtuse angle of 90 to 180 degrees (such as 100, 120, 130, 140, 150 or 170 degrees) with the front side of the first shell body. This can better adjust the indoor temperature and humidity and improve the air circulation efficiency.

For example, when the obtuse angle is 100 degrees, the air volume at the first air outlet 130 is small, and the air circulation efficiency is low. When the obtuse angle is 170 degrees, the air circulation efficiency is improved, so that the air flow rate is accelerated. When the obtuse angle is 140 degrees, the air flow rate is moderate, and the indoor temperature and humidity are relatively uniform.

4, 5 and 15, the first housing 100 defines a heat exchange space 110 (such as a heat exchange air duct), and the heat exchange space 110 is connected to the first air inlet 120 and the first air outlet 130. The heat exchanger 150 is disposed in the heat exchange space 110, and the heat exchanger 150 is configured to heat the air passing through the heat exchanger 150 to form a heat exchange airflow.

The indoor unit 1 includes a first fan (such as a heat exchange fan), which is disposed in a first housing 100. The first fan is configured to drive the air outside the indoor unit 1 to enter the heat exchange space 110 through the first air inlet 120, and the first fan is also configured to drive the air to flow through the heat exchanger 150 and then be discharged from the first air outlet 130.

In some embodiments, referring to FIG7 , the first housing 100 further includes a second housing 200 and a first duct 400. The second housing 200 is disposed in the first housing 100. Referring to FIG12 , the indoor unit 1 further includes a second fan 230 (such as a fresh air fan) and a first air guide 240 (such as a fresh air guide). The second fan 230 is disposed in the second housing 200. The second fan 230 is configured to drive the airflow in the second housing 200 to enter the first duct 400 through the first air guide 240.

7 and 9, the first duct 400 is disposed in the first housing 100. The first duct 400 is located at the front side of the first housing 100 (the front side as shown in FIG. 4). The first duct 400 includes a second air guide port 441 and a second air outlet 420. One end of the first duct 400 close to the second air guide port 441 is connected to one end of the second housing 200 close to the first air guide port 240.

9 and 10 , the second air outlet 420 is disposed at the front side of the first duct body 401. A plurality of second air outlets 420 may be disposed on the first duct 400. The plurality of second air outlets 420 may be spaced apart (eg, evenly spaced apart) along the length direction of the first duct 400.

4 and 6, in some embodiments, the first housing 100 further includes a cover 101. The cover 101 is located at the front side of the first housing 100. The cover 101 is connected to the first housing 100. For example, the cover 101 is detachably connected to the first housing 100. The cover 101 includes an opening 140 on a side close to the user (the front side as shown in FIG. 4). For example, the opening 140 may include a plurality of fourth air outlets 430. In this way, it is beneficial to improve the uniformity of the air outlet.

It should be noted that the fourth air outlet 430 is connected to the second air outlet 420. The airflow in the first duct 400 passes through the second air outlet 420 and the fourth air outlet 430 in sequence, and finally flows out of the first housing 100.

9 , in some embodiments, the first duct 400 further includes a first duct body 401 and at least one first air guide portion 410 (such as an air guide plate). For example, at least one first air guide portion 410 includes one or more first air guide portions 410. In the case where at least one first air guide portion 410 includes multiple first air guide portions 410, the multiple first air guide portions 410 are respectively connected to the first duct body 401. The first air guide portion 410 and the inner side wall of the first duct body 401 together enclose at least one first cavity 440. For example, the upper side surface of the first air guide portion 410 away from the second air outlet 420 and the inner side wall of the first duct body 401 define a first cavity 440; the lower side surface of the first air guide portion 410 close to the second air outlet 420 and the first The inner wall of the pipe body 401 defines another first cavity 440 .

It should be noted that a plurality of first air guides 410 may be disposed in the first duct 400 and spaced apart in the height direction of the first housing. For example, a plurality of first air guides 410 may be spaced apart evenly in the height direction of the first housing.

An embodiment in which the first duct 400 includes at least one first air guide portion 410 is described above. Of course, in some embodiments, the first duct 400 may also include a plurality of first air guide portions 410 .

Two adjacent first air guides 410 among the plurality of first air guides 410 are respectively connected to the inner sidewall of the first duct body 401. The two first air guides 410 and the inner sidewall of the first duct body 401 together define at least one first cavity 440.

It should be noted that the first duct 400 may be formed with a plurality of first cavities 440 . Any first air guide portion 410 of the two first air guide portions 410 and the inner side wall of the first duct body 401 may further define a first cavity 440 .

9 and 10, in some embodiments, the first cavity 440 is connected to the second air guide port 441 and the second air outlet 420. It should be noted that the number of the first cavities 440 and the number of the second air outlets 420 may be the same. When the number of the first cavities 440 and the number of the second air outlets 420 are the same, one first cavity 440 corresponds to one second air outlet 420. In this way, the airflow entering the first duct 400 can be discharged through the first cavity 440, the second air outlet 420 and the fourth air outlet 430 in sequence, which can meet the visualization of the air outlet and improve the uniformity of the air outlet.

In some embodiments, under the condition that the air outlet uniformity can be ensured, the number of the first cavities 440 may be different from the number of the second air outlets 420. For example, the number of the first cavities 440 may be less than or greater than the number of the second air outlets 420.

In some embodiments, referring to FIGS. 9 and 10 , the air conditioner 1000 further includes a connection portion 300. The connection portion 300 is configured to connect the second housing 200 and the first duct 400. One end of the second housing 200 close to the first air guide port 240 is connected to the connection portion 300. One end of the first duct 400 close to the second air guide port 441 is connected to the connection portion 300.

In some embodiments, the end of the second housing 200 near the first air guide port 240 may be smoothly connected to the connection portion 300. The end of the first duct 400 near the second air guide port 441 may also be smoothly connected to the connection portion 300. In this way, the air volume loss when the fresh air flows through the connection portion 300 and the first duct 400 in sequence can be reduced.

Here, a smooth connection refers to a transition connection without obvious corners, for example, a connection achieved by filleting or curved surface design.

In some embodiments, the connection part 300 includes a connection part body 310, at least one second wind guide part 330 (such as a wind guide plate), and a second cavity 311. The at least one second wind guide part 330 includes one or more second wind guide parts 330. One second wind guide part 330 of the at least one second wind guide part 330 is connected to the inner side wall of the connection part body 310. One second wind guide part 330 and the inner side wall of the connection part body 310 together define at least one second cavity 311.

It should be noted that the extension direction of the second air guiding portion 330 is substantially consistent with the extension direction of the connecting portion body 310 .

The above describes an embodiment in which the first duct 400 includes at least one first air guide 410. Of course, in some embodiments, the first duct 400 may also include at least two first air guides 410. In this case, the inner side wall of the first duct body 401 and the first air guide 410 together define at least three first cavities 440. In this way, the fresh air from the second air outlet 420 can be more uniform.

9 , in some embodiments, the connection portion 300 includes a connection portion body 310 and at least two second air guides 330. The at least two second air guides 330 include two or more second air guides 330, and two adjacent second air guides 330 of the at least two second air guides 330 are respectively connected to the connection portion body 310. The two second air guides 330 and the inner side wall of the connection portion body 310 together define at least one second cavity 311.

It should be noted that the connection portion 300 may include a plurality of second cavities 311 . One of the two second air guide portions 330 and the inner side wall of the connection portion body 310 may further define a second cavity 311 .

It should be noted that the second cavity 311 is connected to the first air guide port 240 and the second air guide port 441. In this way, when the airflow passes through the first air guide port 240 and the second cavity 311 in sequence, the air volume loss during the airflow entering the first duct 400 from the second housing 200 can be reduced.

In some embodiments, referring to FIGS. 9 and 10 , one end of the connecting portion 300 near the first air guide port 240 is substantially flush with one end of the second housing 200 near the first air guide port 240. The connecting portion 300 and the second housing 200 are smoothly connected at the first air guide port 240. Moreover, the connection between the connecting portion 300 and the second housing 200 is a smooth curved surface. For example, the first cut surface of the upper side surface of the connecting portion body 310 near the second housing 200 is substantially flush with the first cut surface of the second housing 200. The extension direction of the portion close to the connecting portion body 310 is substantially parallel. The second section of the lower side surface of the connecting portion body 310 close to the second housing 200 is substantially parallel to the extension direction of one end of the second housing 200 close to the connecting portion body 310. In this way, the airflow smoothly enters the connecting portion 300 from the second housing 200, thereby facilitating the reduction of air volume loss.

In some embodiments, referring to FIG. 9 , one end of the connection part 300 near the second air guide port 441 is roughly flush with one end of the first duct 400 near the second air guide port 441; the connection part 300 and the first duct 400 are smoothly connected at the second air guide port 441. In addition, the connection between the connection part 300 and the first duct 400 is a smooth curved surface. For example, the third section of the upper side of the connection part body 310 near the first duct 400, the third section is roughly parallel to the extension direction of the part of the first duct 400 near the connection part body 310. The fourth section of the lower side of the connection part body 310 near the first duct 400, the fourth section is also roughly parallel to the extension direction of the first duct 400 near the connection part body 310. In this way, it is convenient for the airflow to smoothly enter the connection part 300 from the first duct 400, which is conducive to reducing the air volume loss.

It should be noted that when the airflow in the second housing 200 enters the first duct 400 , the transmission efficiency of the airflow can be improved.

In some embodiments, the fifth section of the second air guide portion 330 close to one end (such as the upper surface or the lower surface) of the second housing 200 is substantially parallel to the extension direction of the portion of the connecting portion 300 close to the second housing 200. In this way, the airflow can smoothly enter the connecting portion 300, thereby facilitating the reduction of air volume loss.

In some embodiments, the sixth section of the second air guide portion 330 close to one end of the first duct 400 (such as the upper surface or the lower surface) is substantially parallel to the extension direction of the portion of the connecting portion 300 close to the first duct 400. In this way, the airflow can smoothly enter the first duct 400, thereby facilitating the reduction of air volume loss.

Therefore, when the airflow in the second housing 200 enters the first duct 400 through the connecting portion 300, the fresh air loss can be reduced and the fresh air outlet efficiency can be improved.

In some embodiments, referring to FIG. 13 , the first housing 100 further includes a first drain portion 500 (such as a drain groove). The first drain portion 500 is connected to the first pipe 400, and the first drain portion 500 is located below the first pipe 400. The first drain portion 500 is located at one end of the first pipe 400 in the length direction. The bottom of the first drain portion 500 is tilted in a direction away from the first pipe 400. For example, one end of the bottom of the first drain portion 500 close to the opening 140 is higher than the end of the bottom of the first drain portion 500 away from the opening 140. In this way, the condensed water generated by the air conditioner can be quickly discharged through the first drain portion 500.

In some implementations, referring to FIG. 13 and FIG. 14 , the first housing 100 further includes at least one guide portion 510 (such as a guide tube or a guide groove, etc.). For example, the at least one guide portion 510 includes one or more guide portions 510. When the at least one guide portion 510 includes a plurality of guide portions 510, two guide portions 510 of the plurality of guide portions 510 may be respectively disposed at both ends of the first drainage portion 500. The two guide portions 510 are respectively connected to the interior of the first drainage portion 500.

It is understandable that when the condensed water quickly flows into the end of the first drainage portion 500 away from the opening 140 , the condensed water can quickly flow into the guide portion 510 to prevent the condensed water from accumulating in the first drainage portion 500 .

In some embodiments, referring to FIGS. 15 and 16 , the first housing 100 further includes a water receiving pan 600. The water receiving pan 600 is located below the heat exchanger 150. The water receiving pan 600 is configured to discharge condensed water generated by the heat exchanger 150 out of the indoor unit 1. For example, the water receiving pan 600 may be arranged along the length direction of the first pipe 400. The bottom of the water receiving pan 600 is arranged at an angle. For example, one end of the bottom of the water receiving pan 600 close to the heat exchanger 150 is higher than the end of the bottom of the water receiving pan 600 away from the heat exchanger 150.

It can be understood that, since the water receiving pan 600 is arranged at an angle, the generated condensed water can quickly flow into the end of the water receiving pan 600 away from the heat exchanger 150 .

14 to 16, the first drain portion 500 is located above the water receiving pan 600, and the guide portion 510 is configured to connect the first drain portion 500 and the water receiving pan 600, so that the condensed water in the first drain portion 500 flows into the water receiving pan 600 through the guide portion 510. The water receiving pan 600 is configured to collect condensed water so that the condensed water can be discharged to the outside through a drain pipe connected to the outside. In this way, the accumulation of condensed water inside the indoor unit 1 can be prevented, and the condensed water can be prevented from flowing out from the fourth air outlet 430.

In some embodiments, referring to FIG. 15 and FIG. 16 , the first housing 100 further includes a second drainage portion 520 (such as a drainage groove, etc.). The second drainage portion 520 is disposed at the bottom of the first pipe 400 and is disposed near the second air outlet 420. The extension direction of the second drainage portion 520 is substantially consistent with the length direction of the first pipe 400. The second drainage portion 520 is configured to allow condensed water in the first pipe 400 to enter the first drainage portion 500. In this way, the condensed water in the first pipe 400 can be prevented from flowing out of the first pipe 400. The fourth air outlet 430 flows out.

In some embodiments, referring to FIG. 11 and FIG. 14 , the guide portion 510 includes an extension portion 511. The first drain portion 500 is connected to the extension portion 511 (such as an extension plate). The guide portion 510 is disposed above the water receiving tray 600, and an extension portion 511 extending downward is disposed at the bottom of the guide portion 510 near the heat exchanger 150. The distance between the extension portion 511 and the heat exchanger 150 is smaller than the distance between the end of the water receiving tray 600 near the first drain portion 500 and the heat exchanger 150, and the end of the extension portion 511 near the water receiving tray 600 is lower than the end of the water receiving tray 600 away from the guide portion 510 in the vertical direction. As a result, the condensed water in the first drain portion 500 can enter the water receiving tray 600 through the guide portion 510 and the extension portion 511 in sequence.

In some embodiments, referring to FIG. 13 and FIG. 14 , the guide portion 510 further includes a guide portion body 513 and at least one blocking portion 512 (such as a blocking plate). At least one blocking portion 512 is disposed on the inner side wall of the guide portion body 513 and extends toward the opposite inner side wall. In the case where the at least one blocking portion 512 includes a plurality of blocking portions 512, the plurality of blocking portions 512 are spaced apart and two adjacent blocking portions 512 extend toward directions close to each other. In this way, the air volume of the fresh air entering the heat exchange space 110 from the guide portion 510 can be limited; the guide portion 510 is formed between the at least one blocking portion 512 and the side wall of the guide portion body 513, so that the condensed water entering the first drain portion 500 can enter the water receiving tray 600 through the guide portion body 513 and the first drain portion 500.

In some embodiments, the length of the guide portion body 513 in the length direction of the first drain portion 500 (such as H2 in Figure 14) is greater than the length of a blocking portion 512 in the length direction of the first drain portion 500 (such as H1 in Figure 14) to ensure that the condensed water in the first drain portion 500 can flow into the water receiving tray 600, and can also limit the airflow of the first drain portion 500 from entering the heat exchange space 110 through the guide portion 510.

In some embodiments, the condensed water generated when the airflow passes through the first pipe 400 will enter the first drain portion 500 through the second drain portion 520, and the condensed water generated by the heat exchanger 150 and the condensed water generated on the inner wall of the first pipe 400 will be discharged into the first drain portion 500, and enter the guide portion 510 through the first drain portion 500. The guide portion 510 is located below the first drain portion 500, and the condensed water enters the guide portion 510 through the first drain portion 500. The guide portion 510 is connected to the drain pipe, and the condensed water in the guide portion 510 is discharged to the outside through the drain pipe, completing the process of discharging the condensed water from indoors to outdoors.

In some embodiments, at least a portion of one end of the first duct 400 near the second air guide port 441 is located above one end of the second housing 200 near the first air guide port 240. The connecting portion 300 is connected to the second housing 200 and the first duct 400, respectively. For example, the connecting portion 300 may extend toward the top of the first housing in a direction from one end of the second housing 200 near the first air guide port 240 to one end of the first duct 400 near the second air guide port 441. At least a portion of the connecting portion 300 is configured as a curved surface, and the extension direction of the second air guide portion 330 is substantially the same as the extension direction of the connecting portion 300. The second air guide portion 330 is connected to the inner side wall of the connecting portion body 310.

For example, a side of the second air guide 330 close to the cover 101 (such as the front side) is connected to the inner side wall of the connecting body 310. For another example, a side of the second air guide 330 close to the cover 101 and a side of the second air guide 330 far from the cover 101 (such as the rear side) are respectively connected to the inner side wall of the connecting body 310. A plurality of second air guides 330 are arranged in the connecting body 310 at intervals along the height of the housing.

In this way, when the fresh air in the second shell 200 enters the first duct 400 through the connecting portion 300, the amount of fresh air passing through the multiple second cavities 311 is roughly equal, which not only helps to reduce the loss of fresh air outlet volume, but also can improve the uniformity of fresh air outlet.

In some embodiments, the first air guide port 240 and the second air outlet 420 can be connected through the first duct 400. For example, the first duct 400 can be an integral piece, in which case, one end of the first duct 400 close to the second housing 200 is connected to one end of the second housing 200 close to the first air guide port 240. Referring to FIG. 10 , the first duct 400 includes a second sub-duct 42, and the second sub-duct 42 is connected to the second housing 200 through the connecting portion 300.

In some embodiments, the first duct 400 may also be a split part. Referring to FIG. 7 , for example, the first duct 400 includes a first sub-duct 41 and a second sub-duct 42 connected to each other. A plurality of second air outlets 420 are provided on the first sub-duct 41. One end of the second sub-duct 42 close to the second shell 200 is connected to one end of the second shell 200 close to the first air guide port 240, and the other end of the second sub-duct 42 is connected to one end of the first sub-duct 41. The first sub-duct 41 and the second sub-duct 42 may be roughly parallel, so that when the fresh air flows from the second shell 200 into the first duct 400, the air volume loss caused by changing the flow direction of the fresh air flow can be reduced, thereby facilitating the improvement of energy utilization.

Alternatively, a predetermined angle may be formed between the first sub-duct 41 and the second sub-duct 42. In this case, a rounded corner may be formed between the first sub-duct 41 and the second sub-duct 42 to reduce air volume loss.

In some embodiments, referring to FIG. 7 , the length direction of the first sub-duct 41 is substantially parallel to the length direction of the first shell 100 , which is beneficial to reducing the volume of the indoor unit and saving occupied space.

In some embodiments, referring to FIG. 9 , the first air guide 410 includes a first sub-air guide 411, a second sub-air guide 413, and a third sub-air guide 412. The extension direction of the first sub-air guide 411 is parallel to the length direction of the first duct 400. The second sub-air guide 413 is disposed between two adjacent second air outlets 420 of the at least one second air outlet 420, and is disposed in the first duct 400. The extension direction of the second sub-air guide 413 may be perpendicular to the length direction of the first duct 400. Of course, in some embodiments, the extension direction of the second sub-air guide 413 may be inclined relative to the length direction of the first duct 400.

In some embodiments, a plurality of first sub-air guides 411 are arranged at intervals in the first duct body 401. In this way, the outlet direction of the fresh air can be converted from the length direction of the first duct 400 to the front direction of the indoor unit 1.

In some embodiments, the distance between two adjacent first sub-air guiding portions 411 and the distance between a first sub-air guiding portion 411 and a side wall of the first duct body 401 closest to the first sub-air guiding portion 411 are substantially equal.

As a result, the amount of fresh air entering the multiple first cavities 440 is substantially equal, so that the fresh air output from the second air outlet 420 can be more uniform.

In some embodiments, the extension direction of the first sub-air guide portion 411 is roughly parallel to the direction in which the fresh air enters the first duct 400 . The first sub-air guide portion 411 can reduce the loss of fresh air volume and can also guide the fresh air to be discharged through the second air outlet 420 .

In some embodiments, referring to FIG. 9 , the first air guide 410 includes a first sub-air guide 411 and a second sub-air guide 413 connected to each other. For example, the first sub-air guide 411 and the second sub-air guide 413 are integrated, which is conducive to the processing and manufacturing of the first air guide 410, reduces the number of assembly parts, and improves assembly efficiency. For another example, the first sub-air guide 411 and the second sub-air guide 413 can also be split parts. In this way, it is convenient to adjust the assembly position of the first sub-air guide 411 and the second sub-air guide 413 as needed, and improve the flexibility of assembly.

In some embodiments, referring to FIG. 9 , the third sub-air guide 412 is disposed between the corresponding first sub-air guide 411 and the second sub-air guide 413, and the third sub-air guide 412 is respectively connected to the first sub-air guide 411 and the second sub-air guide 413. At least a portion of the third sub-air guide 412 is configured as an arc plate. In this way, the third sub-air guide 412 is not only conducive to reducing air volume loss, but also can change the transmission direction of fresh air.

For example, the connection between the third sub-air guide 412 and the first sub-air guide 411 can be a smooth curved surface, and the connection between the third sub-air guide 412 and the second sub-air guide 413 can also be a smooth curved surface. In this way, it is helpful to reduce the air volume loss when the fresh air flows in the first air guide 410, and improve the energy utilization rate. In some embodiments, referring to FIG. 9, the curvature radius of the third sub-air guide 412 of the side wall close to the top of the first duct body 401 among the multiple third sub-air guides 412 is greater than the curvature radius of the third sub-air guide 412 of the side wall close to the bottom of the first duct body 401 among the multiple third sub-air guides 412.

9 , at least one second air outlet 420 includes a plurality of second air outlets 420, and the plurality of second air outlets 420 are spaced apart along the length direction of the first duct body 401. At least one first air guide 410 includes a plurality of first sub-air guides 411, and the length of the first sub-air guide 411 close to the second air outlet 420 among the plurality of first sub-air guides 411 is less than the length of the first sub-air guide 411 far from the second air outlet 420 among the plurality of first sub-air guides 411.

In this way, the fresh air can be transmitted along the length direction of the first duct 400 and converted into air outlet along the front side of the air conditioner indoor unit, and the loss of air volume can be reduced.

9 and 15 , the first duct 400 includes a buffer portion 402 . The buffer portion 402 is disposed at the connection between the bottom inner wall of the first duct body 401 and the inner wall of the first duct body 401 away from the second air outlet 420 .

It should be noted that the extending direction of the buffer portion 402 is substantially consistent with the length direction of the first duct body 401. The side of the buffer portion 402 away from the cover body 101 is connected to the inner side wall of the first duct body 401 away from the second air outlet 420, and the connection is a smooth curved surface. The other side of the buffer portion 402 away from the first sub-air guide portion 411 is connected to the inner side wall of the bottom of the first duct body 401, and the connection is a smooth curved surface. A depression is provided on the side of the buffer portion 402 close to the second air outlet 420, and the fresh air is discharged toward the second air outlet 420 along the depression.

In this way, the outlet direction of the fresh air in the first chamber 440 can be changed by the buffer portion 402, so that the fresh air is discharged from the second chamber 440. The outlet 420 discharges air so that the fresh air is discharged along the front side of the indoor unit 1, and the loss of the fresh air outlet volume can also be reduced.

In some embodiments, eight fourth air outlets 430 are arranged at intervals along the length direction of the indoor unit 1, and the second fan 230 is provided with different rotation speeds in different modes. For example, the rotation speed of the first mode is 500 to 1000 revolutions per minute (r/min), the rotation speed of the second mode is 100 to 1500 revolutions per minute (r/min), the rotation speed of the third mode is 1500 to 2000 revolutions per minute (r/min), and the rotation speed of the fourth mode is 2000 to 3000 revolutions per minute (r/min). In this way, it is convenient to adjust the wind speed in different modes.

When the speed in the first mode is 900 revolutions per minute (r/min), the speed in the second mode is 1300 revolutions per minute, the speed in the third mode is 1550 revolutions per minute, and the speed in the fourth mode is 2700 revolutions per minute. Through simulation, the fresh air volume of the fourth air outlet 430 in different fresh air modes is obtained as shown in Table 1. The fresh air volume of the fourth air outlet 430 is related to the air outlet area of the fourth air outlet 430 and the wind speed of the fourth air outlet 430, and the air volume is the product of the air outlet area of the fourth air outlet 430 and the air outlet speed of the fourth air outlet 430.

Table 1

In some embodiments, referring to FIG. 9 , the first duct 400 further includes a plurality of diverters 450, and the plurality of diverters 450 are respectively connected to the plurality of first air guides 410. Any of the plurality of diverters 450 is disposed at one end of the first air guide 410 close to the second air guide port 441. In the height direction of the first housing, the dimension of the end of the diverter 450 close to the first air guide port 240 is smaller than the dimension of the end of the diverter 450 away from the first air guide port 240. In this way, the airflow can enter the first cavity 440 of the first duct 400 after being diverted by the plurality of diverter angles.

For example, the flow divider 450 is connected to the side of the first pipe body 401 close to the cover 101. Alternatively, the flow divider 450 can also be connected to the side of the first pipe body 401 away from the cover 101. Alternatively, both sides of the flow divider body can be connected to the inner side wall of the first pipe body 401.

It is understandable that, since the first air guide portion 410 has a certain thickness, a diverter portion 450 is provided at one end of the first air guide portion 410 close to the first air guide port 240, so that when the airflow enters the first cavity 440, it can be diverted along the upper surface and the lower surface of the diverter portion 450, and the diverted airflow flows along the first cavity 440. In this way, the wind resistance of the airflow passing through the first air guide portion 410 can be reduced, and the airflow loss can be reduced.

In some embodiments, the splitter 450 and the connecting portion 300 are spaced apart to form a gap, so that the airflow can achieve air pressure balance at the gap, which is conducive to balancing the amount of fresh air entering the multiple first cavities 440. In this way, the uniformity of the air outlets 420 can be improved.

In some embodiments, the diverter 450 extends along the length direction of the first pipe 400. The diverter 450 can be symmetrically arranged. For example, the first surface (such as the upper surface) of the diverter 450 at one end close to the connecting portion 300 is symmetrical with the second surface (such as the lower surface) of the diverter 450 at the end. In this way, the air volume flowing through the upper side and the lower side of the diverter 450 can be roughly equal, which is conducive to achieving uniform air discharge of the multiple second air outlets 420.

In some embodiments, the size of the diverter portion 450 decreases in the direction from the first sub-air guide portion to the second air guide port 441. This facilitates the diversion of the airflow through the diverter portion 450, thereby facilitating the improvement of the uniformity of the air output.

In some embodiments, near the connection portion 300, an angle θ is formed between the upper surface of the diverter portion 450 and the lower surface of the diverter portion 450, and the angle θ satisfies the following formula 1:
0<sin(θ/2)<1/4 Formula (1)

It should be noted that if the angle between the upper surface of the diverter 450 and the lower surface of the diverter 450 is too large, the diversion effect of the diverter 450 will be affected, resulting in the diversion effect of the diverter 450 being not obvious. If the angle between the upper surface of the diverter 450 and the lower surface of the diverter 450 is too small, the length of the diverter 450 will be too long, thereby increasing the occupied space. By setting θ/2 between 0 and 14°, it is helpful to ensure the diversion effect of the diverter 450. For example, the θ can be 0°~5°, 5°~10°, 10°~15° or 15°~20°. When θ is 15°, it is helpful to control the length of the diverter 450, which is convenient for setting the diverter 450 in the first pipe body 401.

In addition, when the length of the diversion part 450 is too long, the space occupied by the diversion part 450 inside the first pipe 400 will increase, thereby resulting in insufficient space in the first pipe body 401, and may also reduce the gap between the diversion part 450 and the connecting part 300, reducing the effect of balancing the fresh air pressure and balancing the fresh air volume.

If the length of the diverter 450 is too short, the angle between the upper surface of the diverter 450 and the lower surface of the diverter 450 will be too large, thereby reducing the diversion effect of the diverter 450. Therefore, in some embodiments, the length of the diverter 450 along the length direction of the first pipe 400 is any value between 10 mm and 50 mm. For example, the length of the diverter 450 along the length direction of the first pipe 400 can be 10 mm to 20 mm, 20 mm to 30 mm, 30 mm to 40 mm, or 40 mm to 50 mm. For example, the length of the diverter 450 can be 15 mm, 25 mm, 35 mm or 45 mm. In this way, it is beneficial to improve the diversion effect of the diverter, thereby improving the uniformity of the air outlet.

It can be understood that by setting the length of the diverter portion 450 within different size ranges, it is helpful to control the diverter effect of the diverter portion, thereby helping to meet the diverse needs of different models.

In some embodiments, the extension direction of the plurality of flow splitters 450 is substantially parallel to the extension direction of the connection portion 300 at a position close to the second air guide port 441. In this way, the airflow entering the first duct 400 can enter the plurality of first cavities 440 more evenly, thereby facilitating improvement of the air outlet uniformity at the plurality of fourth air outlets 430.

When the weather is hot, the air conditioner needs to cool the indoor air, and the heat exchanger 150 works to cool the indoor air. At this time, the fresh air mode is turned on, and the outdoor air is hotter. The hotter air is blown into the room through the fourth air outlet 430, which will cause the indoor temperature to rise, thereby increasing the energy consumption of the air conditioner.

When the weather is cold, the air conditioner needs to heat the indoor air, and the heat exchanger 150 works to heat the indoor air. At this time, the fresh air mode is turned on, and the outdoor air is colder. The colder outdoor air is blown into the room through the fourth air outlet 430, which will cause the indoor temperature to drop and also increase the energy consumption of the air conditioner.

To this end, in some embodiments, referring to Figures 10 and 11, the first housing further includes a heat conducting portion 460 (such as a heat conducting plate). For example, the first housing may include one or more heat conducting portions 460. A heat conducting portion 460 is provided on one side of the first pipe 400 close to the heat exchanger 150, and the heat conducting portion 460 is connected to the first pipe 400. In this way, the heat exchanger 150 can transfer heat with the first pipe 400 through the heat conducting portion 460, which is beneficial to improving the heat exchange efficiency.

When the heat exchanger 150 is working, outdoor air enters the first pipe 400, and the heat transfer part 460 is configured to transfer heat to the first pipe 400. The outdoor air contacts the inner wall of the first pipe 400, so that heat is transferred between the outdoor air and the first pipe 400.

In some embodiments, when the first housing includes a plurality of heat conducting parts 460, the plurality of heat conducting parts 460 may be arranged at intervals along the length direction of the first pipe 400. A first gap is formed between two adjacent heat conducting parts 460 of the plurality of heat conducting parts 460 for heat conduction. The heat conducting part 460 may exchange heat at the heat conducting part 460 or at the first gap. Since the heat exchange efficiency of the heat conducting part 460 close to the heat exchanger 150 is not high, in order to improve the heat exchange efficiency, a gap is required between the plurality of heat conducting parts 460 arranged on the side of the first pipe 400 close to the heat conducting part 460.

It should be noted that if the first gap is too large, the heat exchange area will be reduced, which is not conducive to improving the heat exchange efficiency. If the first gap is too small, it is also not conducive to heat exchange. For this reason, in some embodiments, the first gap between two adjacent heat conducting parts 460 is any value greater than or equal to 0.1mm and less than or equal to 100mm. For example, the first gap is 0.1mm~20mm, 20mm~40mm, 40mm~60mm, 60mm~80mm or 80mm~100mm, etc. For example, the first gap can be 0.1mm, 20mm, 40mm, 60mm, 80mm or 100mm, etc.

By setting the first gap within the above-mentioned different size ranges, the heat exchange area of the heat conducting portion 460 can be increased while the heat exchange efficiency can be improved.

In some embodiments, the heat conducting portion 460 and the first pipe 400 can be made of the same heat-conducting material, so that the heat exchange efficiency between the heat conducting portion 460 and the first pipe 400 can be improved. In some embodiments, a second gap is formed between the heat conducting portion 460 and the heat exchanger 150 for heat conduction. If the second gap is too large, the heat exchange efficiency will be low, which is not conducive to improving the heat transfer efficiency. High heat exchange efficiency. The second gap is any value greater than or equal to 0 mm and less than or equal to 10 mm. For example, the second gap is 0.1 mm to 2 mm, 2 mm to 4 mm, 4 mm to 6 mm, 6 mm to 8 mm or 8 mm to 10 mm, etc. For example, the second gap can be 0.1 mm, 2 mm, 4 mm, 6 mm, 8 mm or 10 mm, etc. By setting the second gap within the above-mentioned different size ranges, it is beneficial to reduce the volume of the indoor unit and improve the heat exchange efficiency between the heat conducting part 460 and the heat exchanger 150.

In some embodiments, a heat conducting part 460 is provided on one side of the first pipe 400 near the heat exchanger 150. When the weather is hot, the hotter outdoor air enters the room and contacts the inner wall of the first pipe 400. The outdoor air transfers heat with the first pipe 400 to cool the outdoor air. When the weather is cold, the colder outdoor air enters the room and contacts the inner wall of the first pipe 400. The outdoor air transfers heat with the first pipe 400 to heat the outdoor air.

In this way, in both hot and cold weather, the heat exchanger 150 can exchange heat with the fresh air passing through the first pipe 400 through the heat conducting part 460, so as to balance the fresh air temperature. This can not only improve the heat exchange efficiency, but also improve the comfort of the air outlet.

In some embodiments, referring to FIG. 4 , the cover 101 of the indoor unit 1 includes an opening 140, and a plurality of fourth air outlets 430 are located in the area where the opening 140 is located. In the height direction of the indoor unit 1, the opening 140 is located above the first air outlet 130. Thus, the heat exchange air outlet of the indoor unit 1 at the first air outlet 130 and the fresh air outlet of the outdoor air at the fourth air outlet 430 meet at the front side of the indoor unit, so that the fresh air is mixed with the heat exchange air indoors, thereby balancing the fresh air temperature and improving the comfort of the air outlet of the air conditioner.

12 , the second housing 200 includes a volute 31 and a first sub-housing 34 . The volute 31 is connected to the first sub-housing 34 to define a first sub-wind chamber 35 therebetween.

17 , the second housing 200 further includes a third air guide portion 32, which is in a volute-shaped structure, an arc-shaped structure, etc. For example, the third air guide portion 32 may be an integral part, and the third air guide portion 32 may be a plastic part or a metal part, etc. Alternatively, the third air guide portion 32 and the second housing 200 are an integral part. In this way, it is not only convenient to install, but also conducive to reducing costs.

In some embodiments, referring to FIGS. 17 and 18 , the third air guide portion 32 includes a fourth sub-air guide portion 321 and a fifth sub-air guide portion 322. The third air guide portion 32 may be formed by splicing the fourth sub-air guide portion 321 and the fifth sub-air guide portion 322. The fourth sub-air guide portion 321 is further away from the first air guide port 240 than the fifth sub-air guide portion 322. The fourth sub-air guide portion 321 is in the form of an arc plate, a curved plate, etc. The fifth sub-air guide portion 322 is in the form of an arc plate, a curved plate, etc. The curvature of the fourth sub-air guide portion 321 is greater than the curvature of the fifth sub-air guide portion 322.

In some embodiments, the curvature of a portion of the fourth sub-air guiding portion 321 may be less than or equal to the curvature of the fifth sub-air guiding portion 322 .

It should be noted that the third air guide 32 is arranged near the first air guide port 240, and the third air guide 32 is configured to divert the fresh air outflow in the first sub-air cavity 35. The fourth sub-air guide 321 is located on the windward side of the fresh air outflow direction. When the fresh air passes through the fourth sub-air guide 321, a part of the fresh air flows back into the first sub-air cavity 35, and another part of the fresh air passes through the first air guide port 240 and enters the connecting portion 300 or the first duct 400. In this way, the fresh air flowing back into the first sub-air cavity 35 can push the fresh air in the volute 31 to rotate in the first sub-air cavity 35, so that the part of the fresh air is recirculated, thereby reducing the air volume loss and improving the ventilation efficiency of the fresh air.

In some embodiments, referring to Figures 8, 17 and 18, the volute 31 includes a volute body 301. The fourth sub-air guide portion 321 is connected to the fifth sub-air guide portion 322. For example, one end of the fourth sub-air guide portion 321 away from the volute body 301 is connected to one end of the fifth sub-air guide portion 322 away from the volute body 301, and if the connection is a smooth curved surface, the wind resistance can be reduced and the energy utilization rate can be improved.

For example, one end of the fourth sub-air guide portion 321 is connected to one end of the fifth sub-air guide portion 322, and the other end of the fourth sub-air guide portion 321 may be connected or not connected to the other end of the fifth sub-air guide portion 322. For another example, the fourth sub-air guide portion 321 and the fifth sub-air guide portion 322 are an integral part, and the integral part structure is in a snail tongue shape, a water drop shape, a fan shape, etc.

It should be noted that there are multiple connection modes between the fourth sub-air guiding portion 321 , the fifth sub-air guiding portion 322 and the volute body 301 .

For example, one end of the fourth sub-air guide portion 321 is connected to one end of the fifth sub-air guide portion 322, the other end of the fourth sub-air guide portion 321 is separated from the other end of the fifth sub-air guide portion 322, and the other end of the fourth sub-air guide portion 321 and the other end of the fifth sub-air guide portion 322 are respectively connected to the volute body 301.

For another example, one end of the fourth sub-air guide portion 321 is connected to one end of the fifth sub-air guide portion 322 , and the other end of the fourth sub-air guide portion 321 is connected to the other end of the fifth sub-air guide portion 322 and is connected to the volute body 301 .

For another example, the fourth sub-air guiding portion 321 and the fifth sub-air guiding portion 322 are an integrated part, and the integrated part is connected to the volute body 301 .

For another example, the third air guide portion 32 and the volute body 301 may also be an integral piece. In some embodiments, referring to FIG. 19 , the volute 31 further includes a third air outlet 351. The third air guide portion 32 and the volute body 301 together define the third air outlet 351. The third air outlet 351 is configured to connect the first sub-air cavity 35 with the first air guide 240.

For example, the third air outlet 351 can be formed as an air outlet, and the air outlet area of the first air guide 240 is larger than the air outlet area of the third air outlet 351. In this way, when the wind speed is constant, by making the air outlet area of the first air guide 240 larger than the air outlet area of the third air outlet 351, it is beneficial to increase the fresh air volume of the first air guide 240.

It is understandable that even if the air outlet area of the third air outlet 351 remains unchanged, due to the arrangement of the fourth sub-air guide portion 321 and the fifth sub-air guide portion 322, in order to increase the air outlet volume of the first air guide port, the air outlet area of the second air guide port 441 can also be increased.

In some embodiments, referring to FIG. 12 and FIG. 17 , the upper end surface of the second housing 200 at the position where the first air guide port 240 is provided is in contact with the volute 31, and the penetration direction of the first air guide port 240 is tangent to the volute 31. In this way, on the one hand, the space utilization efficiency of the second housing 200 inside the indoor unit 1 can be improved, making the internal layout of the indoor unit 1 more reasonable. On the other hand, the air resistance can be reduced, which is convenient for increasing the fresh air volume.

In some embodiments, referring to FIG. 17 , the volute 31 is in a spiral structure (for example, a logarithmic spiral structure, etc.), and the fresh air loss can be reduced through the cooperation between the volute 31 and the first air guide port 240. This not only increases the fresh air outlet volume of the indoor unit, but also helps to improve the indoor fresh air ventilation efficiency.

In some embodiments of the present disclosure, if the structure of the first air guide 240 and the third air outlet 351 in the related art is adopted, the air outlet area is substantially the same. That is, the first air guide 240 is located in the natural extension line direction or straight line direction of the logarithmic spiral line of the volute 31, and when the volute 31 does not include the third air guide part 32, when the second fan 230 works to generate air volume, the loss of fresh air volume will be about 40% more than that of some embodiments of the present disclosure, as verified by simulation.

In some embodiments, by adopting the structure of the third air guide portion composed of the fourth sub-air guide portion 321 and the fifth sub-air guide portion 322, the area of the first air guide port 240 is expanded. Through simulation, it can be concluded that when the first air guide port 240 is 1.6 to 1.8 times the natural extension line or straight line of the logarithmic spiral, and the air volume generated by the work of the second fan 230 remains unchanged, it is verified by simulation that the fresh air loss of the air conditioner in some embodiments of the present disclosure is about 10%. In this way, the fresh air volume loss can be reduced and the fresh air ventilation efficiency can be improved.

In some embodiments, referring to FIG. 12 , the volute 31 includes a first sub-opening 240A, and the first sub-housing 34 includes a second sub-opening 240B. The first sub-opening 240A and the second sub-opening 240B are connected to form a first air guide port 240. Under the action of the second fan 230, the fresh air in the second housing 200 can enter the first duct 400 through the first air guide port 240.

In some embodiments, referring to FIG. 12 , the second housing 200 further includes a second sub-housing 36. The first sub-housing 34 and the second sub-housing 36 define a second sub-wind chamber 39. The first sub-housing 34 includes a third sub-opening 280A, and the second sub-housing 36 includes a fourth sub-opening 280B. The third sub-opening 280A and the fourth sub-opening 280B are connected to form a second air inlet 280. Under the action of the second fan 230, outdoor fresh air can enter the second sub-wind chamber 39 through the second air inlet 280.

The second air inlet 280 is arranged on the rear side of the indoor unit 1, and the second shell 200 also includes a fifth sub-opening 312 (such as a filter installation port). The fifth sub-opening 312 can be located at the top of the first sub-shell 34 and the second sub-shell 36. The first sub-shell 34 is connected to the second sub-shell 36 to define the fifth sub-opening 312.

In some embodiments, referring to FIG. 12 , the second housing 200 further includes a filter assembly. The filter assembly includes a filter screen 37 and a third sub-housing 38 (such as a filter screen housing). The filter screen 37 is disposed in the third sub-housing 38. In order to facilitate accurate installation of the filter screen 37 at the second sub-wind chamber 39. The second housing 200 further includes a guide groove. The guide groove is configured to guide the installation of the filter screen 37 so that the filter screen 37 moves along the guide groove, thereby installing the filter screen 37 at the fifth sub-opening 312.

When fresh air enters the second sub-air chamber 39 from the outside, it needs to be purified by the filter assembly, which is beneficial to improving the quality of the fresh air entering the room.

In some embodiments, referring to FIG. 12 , the first sub-housing 34 includes a partition 341 . The partition 341 is a plate body with a mesh structure. The gap on the partition 341 can connect the first sub-air cavity 35 with the second sub-air cavity 39 .

The second fan 230 is disposed in the first sub-wind chamber 35, and is located at a position of the partition 341 in the first sub-wind chamber 35 close to the volute 31. The area of the partition 341 is greater than or equal to the area of the second fan 230, so that more air in the second sub-wind chamber 39 can enter the first sub-wind chamber 35 through the gap on the partition 341, and the second fan 230 provides power for the circulation of fresh air in the indoor unit 1.

Under the action of the second fan 230, outdoor fresh air enters the second sub-air chamber 39 through the second air inlet 280, is filtered and purified by the filter 37 in the second sub-air chamber 39, so that the purified fresh air enters the second sub-air chamber 39 through the partition 341, and finally enters the first pipe 400 from the second air inlet 280, thereby transporting the outdoor fresh air into the room, thereby improving the air quality.

In some embodiments, referring to FIG. 10 , the first pipe 400 further includes a fourth fixing portion 403 and a first fixing assembly 470. The fourth fixing portion 403 is connected to the first pipe body 401. The fourth fixing portion 403 is disposed on one side of the first pipe body 401 close to the heat exchanger 150. The first pipe body 401 and the fourth fixing portion 403 are connected via the first fixing assembly 470.

The first fixing assembly 470 includes a first mounting portion 471 and a first matching portion 472. For example, the first mounting portion 471 is disposed on one of the first pipe body 401 and the fourth fixing portion 403, and the first matching portion 472 is disposed on the other of the first pipe body 401 and the fourth fixing portion 403, and the first matching portion 472 matches the first mounting portion 471, so that the first pipe body 401 and the fourth fixing portion 403 are connected.

In some embodiments, referring to Figures 10 and 11, the first pipe 400 further includes a second fixing assembly 480. The fourth fixing portion 403 is connected to the first drainage portion 500 through the second fixing assembly 480. The second fixing assembly 480 is connected to a side of the fourth fixing portion 403 close to the heat exchanger 150, and is also connected to a side of the first drainage portion 500 close to the heat exchanger 150.

The second fixing assembly 480 includes a second mounting portion 481 and a second matching portion 482. For example, the second mounting portion 481 may be located on the fourth fixing portion 403, and the second matching portion 482 may be located on the first drainage portion 500. Alternatively, the second matching portion 482 may be located on the fourth fixing portion 403, and the second mounting portion 481 may be located on the first drainage portion 500.

11 , the first pipe 400 further includes a third fixing assembly 490. The first pipe body 401 is connected to the first drain portion 500 through the third fixing assembly 490, which is located on the outer surface of the first pipe body 401 and at the bottom of the first pipe body 401.

The third fixing assembly 490 includes a third mounting portion 491 and a third matching portion 492. The third mounting portion 491 is disposed on one of the first pipe body 401 and the first drainage portion 500, and the third matching portion 492 is disposed on the other of the first pipe body 401 and the first drainage portion 500.

It should be noted that the first matching portion 472 and the first mounting portion 471, the second matching portion 482 and the second mounting portion 481, and the third mounting portion 491 and the third matching portion 492 can be connected by fasteners such as bolts, nuts, and screws, or can be connected by snap-fitting or other methods.

In some embodiments, referring to FIG. 20 and FIG. 21 , the indoor unit may not be provided with the opening 140. In this case, the first housing may include a plurality of fourth air outlets 430. For example, the fourth air outlet 430 may be in the shape of a square hole, or the fourth air outlet 430 may be in the shape of a round hole. The plurality of fourth air outlets 430 are arranged on the side of the cover body 101 close to the user. In this way, not only can the accumulation of condensed water be prevented, but also the fresh air outlet can be made softer, thereby preventing the fresh air from blowing directly to the user when the fresh air function is turned on.

Those skilled in the art will appreciate that the disclosure scope of the present invention is not limited to the above specific embodiments, and certain elements of the embodiments may be modified and replaced without departing from the spirit of the present application. The scope of the present application is limited by the appended claims.

Claims (22)

An air conditioner, comprising: outdoor unit; and An indoor unit is connected to the outdoor unit, and the indoor unit includes: A first shell, comprising a heat exchange space, a first air inlet and a first air outlet, wherein the heat exchange space is in communication with the first air inlet and the first air outlet; a heat exchanger disposed in the heat exchange space and configured to exchange heat with the air passing through the heat exchanger to form a heat exchange airflow; A first fan is arranged in the heat exchange space, and the heat exchange airflow is suitable for entering the heat exchange space through the first air inlet and being output from the first air outlet after being heated by the heat exchanger; A second shell is disposed in the first shell and includes a first air guide port; A second fan is disposed in the second housing; a first duct, disposed in the first shell and comprising a second air guide port, the first duct being connected to the second shell; a connecting portion, the connecting portion being located between the second shell and the first pipe and being connected to the second shell and the first pipe respectively; Wherein, the first duct also includes a first duct body, at least one first air guide, at least one second air outlet and at least one first cavity, the at least one second air outlet is arranged on one side of the first duct body, and the first cavity connects the second air guide and the second air outlet. The air conditioner according to claim 1, wherein the first chamber satisfies one of the following: The first cavity is formed between two adjacent first air guide portions of the at least one first air guide portion; and The first cavity is formed between the first air guide portion and the first duct body. The air conditioner according to claim 1 or 2, wherein: The connecting portion includes a connecting portion body, at least one second air guide portion and at least one second cavity, wherein the second cavity communicates with the first air guide port and the second air guide port; The second air guide portion is connected to the connecting portion body, an extending direction of the second air guide portion is substantially consistent with an extending direction of the connecting portion body, and one of the following conditions is satisfied: The second cavity is formed between two adjacent second air guide portions of the at least one second air guide portion; and The second cavity is formed between the second air guiding portion and the adjacent connecting portion body. The air conditioner according to any one of claims 1 to 3, wherein: One end of the connecting portion close to the first air guide port is substantially flush with one end of the second shell close to the first air guide port; the connecting portion is connected to the second shell at the first air guide port. The air conditioner according to any one of claims 1 to 4, wherein: One end of the connecting portion close to the second air guide port is substantially flush with one end of the first pipe close to the second air guide port; the connecting portion is connected to the first pipe at the second air guide port. The air conditioner according to any one of claims 1 to 5, wherein the second air guide portion satisfies at least one of the following: An extension direction of one end of the second air guide portion close to the second air guide port is substantially parallel to an extension direction of a side of the first duct provided with the second air outlet; or An extension direction of one end of the second air guiding portion close to the first air guiding port is substantially parallel to an extension direction of one side of the second housing close to the first air guiding port and away from the second fan. The air conditioner according to any one of claims 1 to 6, wherein: At least a portion of the first pipe is located above the second shell. The air conditioner according to any one of claims 1 to 7, wherein: The connecting portion extends in a direction from one end of the second shell close to the first air guide port, pointing to one end of the first duct close to the second air guide port, and toward a direction close to the top of the first shell. The air conditioner according to any one of claims 3 to 8, wherein: The second air guide portion extends in a direction from one end of the second shell body close to the first air guide port to one end of the first duct close to the second air guide port, toward a direction close to the top of the first shell body. The air conditioner according to any one of claims 1 to 9, further comprising: A first drainage portion, connected to the first pipe and located below the first pipe; a water receiving tray, located below the heat exchanger; and The flow guide portion is arranged between the first drainage portion and the water receiving tray. The air conditioner according to claim 10, wherein: The first shell further includes a second drainage portion, which is located between the first drainage portion and the first pipe and is communicated with the first drainage portion. The air conditioner according to any one of claims 1 to 11, wherein: The first pipeline includes a first sub-pipeline and a second sub-pipeline, The length direction of the first sub-pipe is parallel to the length direction of the first shell; the first sub-pipe is provided with the second air outlet; The second sub-pipe is connected to one of the second shell and the connecting portion. The air conditioner according to any one of claims 1 to 12, wherein the indoor unit further comprises at least one diverter portion, an extension direction of the diverter portion is substantially consistent with a length direction of the first pipe, the diverter portion is connected to the pipe body, and an end of the diverter portion close to the second air guide port is connected to the first air guide portion. The air conditioner according to claim 13, wherein: The first air guide portion includes a first sub-air guide portion and a second sub-air guide portion connected to each other; The first sub-air guide portion is parallel to the length direction of the first pipe; The second sub-air guide portion is disposed between two adjacent second air outlets of the at least one second air outlet and is disposed in the first duct; Wherein, the other end of the diversion portion opposite to the one end is connected to the first sub-air guiding portion. The air conditioner according to claim 14, wherein The first wind guide portion also includes a third sub-wind guide portion; the third sub-wind guide portion is connected to the first sub-wind guide portion and the second sub-wind guide portion respectively, and is located between the first sub-wind guide portion and the second sub-wind guide portion, so that the first sub-wind guide portion and the second sub-wind guide portion are connected through the third sub-wind guide portion. The air conditioner according to any one of claims 13 to 15, wherein: The at least one second air outlet comprises a plurality of second air outlets, and the plurality of second air outlets are arranged at intervals along the length direction of the first duct body; The at least one first air guide portion includes a plurality of first sub-air guide portions, and a length of a first sub-air guide portion close to the second air outlet among the plurality of first sub-air guide portions is smaller than a length of a first sub-air guide portion far from the second air outlet. The air conditioner according to any one of claims 1 to 16, wherein: The second housing further comprises a volute and a third air guide portion, wherein the third air guide portion is connected to the volute; The third wind guide portion includes a fourth sub-wind guide portion and a fifth sub-wind guide portion which are at least partially connected; The fourth sub-air guiding portion is further away from the first air guiding port than the fifth sub-air guiding portion, and the curvature of the fourth sub-air guiding portion is greater than the curvature of the fifth sub-air guiding portion. The air conditioner according to claim 17, wherein: One end of the fourth sub-air guide portion is connected to one end of the fifth sub-air guide portion, and the third air guide portion satisfies one of the following: The other end of the fourth sub-air guiding portion is spaced apart from the other end of the fifth sub-air guiding portion, and the other end of the fourth sub-air guiding portion and the other end of the fifth sub-air guiding portion are respectively connected to the volute; and The other end of the fourth sub-air guiding portion is connected to the other end of the fifth sub-air guiding portion and is connected to the volute. The air conditioner according to any one of claims 16 to 18, wherein: An air outlet area of the first air guide port is greater than an air outlet area of a third air outlet surrounded by the third air guide portion and the second shell. The air conditioner according to any one of claims 1 to 19, wherein: The first duct further includes a buffer portion, which is configured to buffer the airflow before flowing out of the first air outlet, and the buffer portion is located in the first duct body. The air conditioner according to claim 20, wherein the buffer portion is located at a connection between a bottom portion of the first duct body and an inner side wall of the first duct body away from the second air outlet. The air conditioner according to any one of claims 1 to 21, wherein: The second housing further comprises: A volute tongue, wherein the third air guide portion includes the volute tongue; A volute, the volute further comprising a volute body and a first sub-wind chamber, the volute is provided with the second fan, the volute body defines the first sub-wind chamber, the volute tongue is located in the volute body, and the volute tongue is connected to the volute body; A filter assembly, the filter assembly being disposed in the volute body, the filter assembly comprising a filter screen and defining a second sub-wind chamber; and A partition is arranged in the volute body and has a gap, and the first sub-air chamber and the second sub-air chamber are connected through the gap on the partition.