CN116066997A - Air duct, air duct preparation method and mobile air conditioner - Google Patents

Abstract

The invention discloses an air duct, a preparation method of the air duct and a mobile air conditioner, wherein the air duct comprises: a duct body with a first nozzle at one end and a second nozzle at the other end; The pipe body is used to reduce the heat transfer rate between the inner surface and the outer surface of the air pipe. The technical scheme of the invention can prevent condensation from forming on the outer surface of the air duct.

Description

Air duct, air duct preparation method and mobile air conditioner

technical field

The invention relates to the technical field of air conditioners, in particular to an air duct, a preparation method for the air duct and a mobile air conditioner.

Background technique

For a common mobile air conditioner, it is equipped with an outdoor air inlet, an outdoor air outlet, and an outdoor heat exchanger located between the outdoor air inlet and the outdoor air outlet. Both the outdoor air inlet and the outdoor air outlet usually require It communicates with the outdoor space through air ducts. When the mobile air conditioner is in heating mode, the outdoor heat exchanger exists as an evaporator, and usually the temperature of the outdoor air is lower than the indoor air temperature after heating, resulting in the air temperature inside the air duct being higher than that outside the air duct. The air temperature should be low, so it is easy to form condensation on the outer surface of the air duct, which affects the user experience.

Contents of the invention

The main purpose of the present invention is to propose an air duct, which aims at avoiding the formation of condensation on the outer surface of the air duct.

To achieve the above object, the air duct proposed by the present invention includes:

a pipe body with a first nozzle at one end and a second nozzle at the other end; and

The temperature insulation layer is arranged on the pipe body to reduce the heat transfer rate between the inner surface and the outer surface of the air pipe.

Optionally, the heat insulation layer is provided on the outer surface of the pipe body.

Optionally, the first nozzle is connected with a first pipe joint.

Optionally, the second nozzle is connected with a second pipe joint.

Optionally, the pipe body is configured as a corrugated pipe.

Optionally, the thermal insulation layer is configured as a flocking layer combined with the surface of the pipe body.

Optionally, the flocking layer comprises a first primer layer, a second primer layer, a flocking glue layer and fluff, and the first primer layer, the second primer layer and the flocking glue Layers are stacked in sequence, the fluff is arranged on the flocking glue layer, and the first primer layer is connected to the surface of the pipe body.

Optionally, the temperature insulation layer is configured as a temperature insulation sleeve sleeved on the pipe body.

Optionally, the heat insulation layer is configured as a heat insulation sheet wrapped around the pipe body.

Optionally, the heat insulating sheet has a first side and a second side opposite to each other, the heat insulating sheet is wound around the pipe body, and the first side is connected to the second side.

Optionally, the first side and the second side are bonded by Velcro.

Optionally, one end of the thermal insulation layer close to the first nozzle and one end close to the second nozzle are both fastened to the pipe body by a cable tie or a strap, or connected to the pipe body by Velcro. The pipe body is bonded.

Optionally, the heat insulating material of the heat insulating layer is configured as heat insulating cotton or an air cushion.

The present invention also proposes a method for preparing an air duct, comprising the steps of:

Provide the pipe body;

A temperature insulation layer is arranged on the pipe body.

Optionally, the heat insulation layer is configured as a flocking layer, and the step of arranging the heat insulation layer on the pipe body includes:

pretreating the surface of the tube body;

Apply flocking glue on the surface of the pretreated pipe body;

Utilize a flocking machine to plant the fluff on the flocking glue;

The flocking glue is dried.

Optionally, the step of pretreating the surface of the pipe body includes:

Apply a first layer of primer on the surface of the pipe body, and bake the first layer of primer in an environment at a first preset temperature for a first preset time to dry the first layer of primer;

Apply a second layer of primer on the dried first layer of primer, and bake the second layer of primer for a second preset time in an environment at a second preset temperature, so as to dry the Describe the second layer of primer;

Wherein, both the first preset temperature and the second preset temperature are lower than the temperature upper limit of the service temperature range of the material of the pipe body.

Optionally, the step of drying the flocking glue is specifically: drying the flocking glue for a third preset time in an environment at a third preset temperature, and during the baking process, at the Ventilation treatment is performed inside the tube body; wherein, the third preset temperature is higher than the temperature upper limit of the service temperature range of the material of the tube body.

Optionally, the heat insulation material of the heat insulation layer adopts an air cushion, and the step of pretreating the surface of the pipe body includes:

Covering the surface of the tube body with the inflatable cushion in the uninflated state, and fixing it to the tube body;

Inflate the air cushion.

The present invention also proposes a mobile air conditioner, comprising the aforementioned air duct; or comprising the air duct prepared by the aforementioned air duct preparation method.

In the technical solution of the present invention, since the pipe body of the air duct is provided with a heat insulating layer, even if the air with a relatively low temperature circulates in the air duct, its cooling capacity is difficult to transfer to the outer surface of the air duct, thus making the air duct The outer surface of the duct always maintains a temperature equivalent to the temperature of the air outside the duct, that is, it can prevent the outer surface of the duct from being lower in temperature, thereby avoiding the formation of condensation on the outer surface of the duct and improving user experience; The pipe body of the pipe is provided with a temperature insulation layer, which can make it difficult for the heat of the air outside the air pipe (that is, the heat of the indoor air) to be transferred to the inside of the air pipe, thereby preventing the heat of the indoor air from being carried by the flowing air in the air pipe. To the outside, reduce the negative effect of the air duct on the indoor heat.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without creative effort.

Fig. 1 is a schematic structural view of an embodiment of the air duct of the present invention;

Fig. 2 is a partial enlarged view of an embodiment of the temperature insulation layer of the air duct in Fig. 1;

Fig. 3 is a partially enlarged view of another embodiment of the temperature insulation layer of the air duct in Fig. 1 .

Explanation of reference numbers:

The realization of the purpose of the present invention, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

It should be noted that if there is a directional indication (such as up, down, left, right, front, back...) in the embodiment of the present invention, the directional indication is only used to explain the relationship between the components in a certain posture. If the specific posture changes, the directional indication will also change accordingly.

In addition, if there are descriptions involving "first", "second" and so on in the embodiments of the present invention, the descriptions of "first", "second" and so on are only for descriptive purposes, and should not be interpreted as indicating or implying Its relative importance or implicitly indicates the number of technical features indicated. Thus, the features defined as "first" and "second" may explicitly or implicitly include at least one of these features. In addition, if "and/or" or "and/or" appears throughout the text, its meaning includes three parallel plans, taking "A and/or B" as an example, including plan A, or plan B, or A and B is a solution that is satisfied at the same time. In addition, the technical solutions of the various embodiments can be combined with each other, but it must be based on the realization of those skilled in the art. When the combination of technical solutions is contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist , nor within the scope of protection required by the present invention.

The invention provides an air duct.

Referring to Fig. 1, in an embodiment of the present invention, the air duct includes:

The pipe body 10 has a first nozzle at one end and a second nozzle at the other end; and

The temperature insulation layer 20 is provided on the pipe body 10 to reduce the heat transfer rate between the inner surface and the outer surface of the air pipe.

In the present invention, the air duct can be applied to a mobile air conditioner, so that the outdoor air inlet of the mobile air conditioner communicates with the outdoor space, and the outdoor air outlet of the mobile air conditioner communicates with the outdoor space, so that the outdoor air can Through an air duct, the outdoor air inlet flows through the outdoor heat exchanger of the mobile air conditioner, and then returns to the outdoor space from the outdoor air outlet through another air duct, thereby completing the connection between the outdoor air and the outdoor air. The heat exchange of the heat exchanger.

Without loss of generality, the mobile air conditioner is usually a cooling and heating type mobile air conditioner with cooling mode and heating mode at the same time. When the mobile air conditioner to which the air duct is applied is in heating mode, after running for a period of time, the temperature of the outdoor air is usually lower than the temperature of the indoor air, and the outdoor-side heat exchanger exists as an evaporator , the temperature of the air flowing through the outdoor side heat exchanger will be further reduced, so that the air temperature in the two air ducts connected to the mobile air conditioner will be lower than the air temperature outside the air duct.

In the technical solution of the present invention, since the pipe body 10 of the air duct is provided with a heat insulating layer 20, even if the air with relatively low temperature circulates in the air duct, its cooling capacity is difficult to transfer to the outer surface of the air duct, thereby The outer surface of the air duct is kept at a temperature equivalent to the temperature of the air outside the air duct, that is, the temperature of the outer surface of the air duct is prevented from being lower, thereby preventing the formation of condensation on the outer surface of the air duct and improving user experience; in addition, the same Since the pipe body 10 of the air duct is provided with a heat insulating layer 20, it is difficult to transfer the heat of the air outside the air duct (that is, the heat of the indoor air) to the inside of the air duct, thereby preventing the heat of the indoor air from being absorbed by the inside of the air duct. The flowing air is brought to the outside, reducing the negative effect of the air duct on the indoor heat.

In one embodiment, the temperature insulation layer 20 is provided on the outer surface of the pipe body 10; in this way, the installation of the temperature insulation layer 20 on the pipe body 10 can be facilitated, especially, after the pipe body 10 is formed first, Then, the heat insulating layer 20 is bonded to the outer surface of the pipe body 10 . However, the present design is not limited thereto. In some other embodiments, the temperature insulation layer 20 can also be arranged on the inner surface of the pipe body 10; and in some other embodiments, the temperature insulation layer 20 can also be It is arranged inside the pipe wall of the pipe body 10, that is, the temperature insulation layer 20 exists as an intermediate spacer layer of the pipe body 10; The temperature insulation layer 20 is provided on at least two places of the inner surface, the outer surface, and the interior of the pipe wall of the pipe 10 .

In one embodiment, the first nozzle is connected with a first pipe joint 101 . Without loss of generality, the first nozzle is used to connect with the mobile air conditioner, and the setting of the first pipe joint 101 can improve the assembly efficiency of the connection between the air duct and the mobile air conditioner. Optionally, the first pipe joint 101 is provided with a detachable structure connected with the mobile air conditioner, so as to facilitate cleaning, disassembly, and aging replacement of the air pipe.

Similarly, the second nozzle is connected with a second pipe joint 102 . Without loss of generality, the second nozzle is used to communicate with the outdoor space, which may be pierced through the wall or window, or connected to a sealing plate on the wall or window vent. The arrangement of the second pipe joint 102 can improve the assembly efficiency of the connection between the air pipe and the sealing plate. Optionally, the second pipe joint 102 is also provided with a detachable structure connected with the sealing plate, so as to facilitate the cleaning, disassembly and aging replacement of the air pipe.

In one embodiment, the pipe body 10 is configured as a corrugated pipe, so that the air pipe can be stretched, thereby facilitating the movement of the mobile air conditioner in different positions in the indoor space.

Referring to Fig. 1 and Fig. 2 together, in one embodiment, the temperature insulation layer 20 is configured as a flocking layer combined with the surface of the pipe body 10; the flocking layer has a good temperature insulation effect and can be easily Good for reducing the rate of heat transfer between the inner and outer surfaces of the duct.

Further, the flocking layer comprises a first primer layer 203, a second primer layer 204, a flocking adhesive layer 202 and a fluff 201, and the first primer layer 203, the second primer layer 204 and the flocking glue layer 202 are stacked in sequence, the fluff 201 is arranged on the flocking glue layer 202 , and the first primer layer 203 is connected to the surface of the pipe body 10 .

In this embodiment, specifically, the first primer layer 203 is coated with a first layer of primer on the surface of the pipe body 10, and the first layer of primer is applied in an environment at a first preset temperature. obtained by baking for a first preset time; the second primer layer 204 is coated with a second layer of primer on the first primer layer 203, and at a second preset temperature It is obtained by baking the second layer of primer in the environment for a second preset time; wherein, the first preset temperature and the second preset temperature are both lower than the service temperature range of the material of the pipe body 10 upper temperature limit.

Without loss of generality, taking the material of the pipe body 10 as PVC material as an example, the use temperature of PVC material is generally between -15°C and 55°C, the first preset temperature and the second preset temperature The ranges are from 48°C to 52°C, and both the first preset time and the second preset time are 3 minutes. It can be understood that, compared with the technical solution of directly applying a thicker layer of primer and using a higher baking temperature to bake for a longer time, this technical solution divides the primer into at least two layers for coating, A lower baking temperature and a shorter baking time are adopted respectively, which can not only enable the primer to be dried, but also prevent the tube body 10 from being damaged by an excessively high drying temperature, thereby avoiding the service life of the tube body 10 reduce. It should be noted that, in a specific embodiment taking PVC material as an example, the first preset temperature and the second preset temperature are the same, and the first preset time and the second preset time The time is also the same; but the present design is not limited thereto, in other embodiments, the first preset temperature and the second preset temperature may also be different, the first preset time and the second The preset times can also be different.

In the foregoing embodiments, the heat insulation layer 20 is configured as a flocking layer; however, the present design is not limited thereto, and in some other embodiments, the heat insulation layer 20 can also be configured as a surface of the pipe body 10 Combined foam layers. It can be understood that both the flocking layer and the foaming layer are directly formed on the surface of the pipe body 10 .

In some other embodiments, the temperature insulation layer 20 can also be a temperature insulation piece formed independently of the pipe body 10, and then installed on the surface of the pipe body 10; Pipe body 10, and then assemble the temperature insulation piece and the pipe body 10, it can be understood that large-scale production is conducive to the reduction of product cost, of course, the temperature insulation piece and the pipe body 10 can also be entrusted to different professional manufacturers for production , and then purchase back to assemble, so as to use social resources to produce products. For this type of heat insulating part, it can be in the shape of a sleeve, which is usually sleeved on the pipe body 10 during assembly; it can also be in the form of a flat sheet, which is usually wound on the pipe body 10 when assembling, and then After winding, the sides that are close to each other are connected. These two situations are described separately below.

In one embodiment, the heat insulation layer 20 is configured as a heat insulation sleeve sheathed on the pipe body 10; it can be understood that the sheathing method requires fewer processes and is more convenient to assemble. It should be noted that, for the pipe body 10 provided with pipe joints, it is usually necessary to disassemble the pipe joint at least one end of the pipe body 10 first, then put the temperature insulating sleeve on the pipe body 10, and finally put the disassembled pipe body 10 Reinstall the connector. It should also be noted that when the pipe body 10 is configured as a corrugated pipe, in order to ensure the tightness of the temperature-insulating sleeve to the pipe body 10, the bellows needs to be straightened before the sleeve is installed, and then the heat-insulating sleeve Set up.

Further, after the heat insulation sleeve is put on the pipe body 10, it is usually necessary to tie the end of the heat insulation sleeve close to the first nozzle and the end of the heat insulation sleeve close to the second nozzle by using cable ties or bandages. One end of each is fastened on the pipe body 10 to ensure the installation reliability between the heat insulating sleeve and the pipe body 10 . However, the present design is not limited thereto. In some other embodiments, the end of the thermal insulation sleeve close to the first nozzle and the end close to the second nozzle of the heat insulation sleeve can also be connected by Velcro or sticky glue. Bonded on the pipe body 10 or the pipe joint; and in some other embodiments, one end of the thermal insulation sleeve close to the first nozzle and one end close to the second nozzle can also be welded On the pipe body 10 or the pipe joint.

In addition, it should be noted that the heat insulation material of the heat insulation sleeve can be configured as heat insulation cotton, or can be configured as an air cushion or other heat insulation materials, as long as it can have a good heat insulation effect. Among them, the insulation cotton has excellent temperature insulation effect and low cost; gas is usually a poor conductor of heat, so that the air cushion has a better inflation effect. It should be noted that when the insulation sleeve is made of an inflatable cushion, the inflatable cushion is provided with an air cavity 205 (see Figure 3). Since the inflated cushion will expand after inflation, the sleeve of the inflatable cushion is usually placed in the uninflated position. In the state of the tube body 10, it is first put on the tube body 10, and then inflated. In this way, on the one hand, it can prevent the inflated air cushion sleeve from being difficult to put on the tube body 10, and on the other hand, it can make the inflatable cushion sleeve in the process of expansion. In the middle, it is better to fit tightly on the pipe body 10 .

In another embodiment, the heat insulation layer 20 can also be configured as a heat insulation sheet wrapped around the pipe body 10; it can be understood that, on the one hand, the winding method can be conveniently tightened during the winding process to ensure The close fit between the heat insulating sheet and the pipe body 10 , on the other hand, for the pipe body 10 provided with pipe joints, the heat insulating sheet can also be installed on the pipe body 10 without disassembling the pipe joints. It should be noted that, when the pipe body 10 is configured as a corrugated pipe, in order to ensure the tightness of the heat insulation sheet to the pipe body 10, the bellows needs to be straightened before winding, and then the heat insulation sheet should be wound.

Further, the heat insulating sheet has opposite first side and second side, the heat insulating sheet is wound around the pipe body 10, and the first side is connected to the second side; It can be understood that, in this case, the heat insulating sheet just wraps around the pipe body 10 once, and on the premise of ensuring the coverage of the pipe body 10 , the materials used are the least and the cost is the lowest. However, the present design is not limited thereto. In other embodiments, the heat insulating sheet can also be wound around the pipe body 10 for more than one turn. Without loss of generality, it can be wound from the first side, with the The second side ends. In this case, the second side usually needs to be connected with the part of the insulation sheet covering the first side, and the first side is usually connected to the first side first. Describe the pipe body 10.

It should be noted that, in some embodiments, the heat insulation sheet may be rectangular in the unfolded state, and the first side and the second side are the two long sides of the rectangular heat insulation sheet; however, this design Not limited thereto, in some other embodiments, the heat insulation sheet can also be arranged in a belt shape and wound obliquely around the pipe body 10, the first side and the second side are belt-shaped insulation Opposite ends of the temperature sheet.

For the technical solution in which the heat insulation sheet just wraps around the pipe body 10 once, further, the first side and the second side are bonded by Velcro, so that it is easy to adjust the temperature insulation The fit tightness between the sheet and the pipe body 10, and the ease of replacement and disassembly of the heat insulation sheet. However, the design is not limited thereto. In some other embodiments, the first side and the second side can also be bonded by adhesive glue; and in some other embodiments, the first side The one side and the second side can also be welded or stitched.

For the heat insulation sheet, further, after the winding connection of the heat insulation sheet to the pipe body 10 is completed, it is usually necessary to wrap the end of the heat insulation sheet close to the first nozzle by using a cable tie or a strap, etc. , and one end close to the second nozzle are all fastened on the pipe body 10 to ensure the installation reliability between the heat insulating sheet and the pipe body 10 . However, the present design is not limited thereto. In some other embodiments, one end close to the first nozzle and one end close to the second nozzle after winding can also be glued together by Velcro or sticky glue. On the pipe body 10; and in some other embodiments, one end of the thermal insulation sheet close to the first nozzle and one end near the second nozzle of the wound sheet can also be welded to the pipe body 10 superior.

In addition, similarly, it should be noted that the heat insulation material of the heat insulation sheet can be configured as heat insulation cotton, or can be configured as an air cushion or other heat insulation materials, as long as it can have a good heat insulation effect. In particular, when the insulation sheet is made of an air-filled cushion, the air-filled cushion is provided with an air cavity 205 (see Figure 3). Since the inflated air-filled cushion will expand after inflation, it is not easy to curl and wind. In the uninflated state, it is wound onto the pipe body 10 first, and then inflated. In this way, on the one hand, it can prevent the inflated gasket from being difficult to wrap on the pipe body 10, and on the other hand, it can make the inflation gasket , better clinging to the pipe body 10.

The present invention also proposes a method for preparing an air duct, comprising the steps of:

S10, providing the pipe body;

S20, setting a temperature insulation layer on the pipe body.

It can be understood that the air duct prepared by this air duct preparation method is provided with a heat insulating layer, so that even if the air circulates in the air duct is relatively low-temperature air, its cooling is difficult to transfer to the outer surface of the air duct, so that The outer surface of the air duct always maintains a temperature equivalent to the temperature of the air outside the air duct, that is, it can prevent the outer surface of the air duct from being lower in temperature, thereby avoiding the formation of condensation on the outer surface of the air duct and improving user experience; There is a heat insulation layer on the air duct, which can make it difficult for the heat of the air outside the air duct (that is, the heat of the indoor air) to be transferred to the inside of the air duct, thereby preventing the heat of the indoor air from being carried outside by the flowing air in the air duct. , to reduce the negative effect of the air duct on the indoor heat.

In one embodiment, the heat insulation layer is configured as a flocking layer, and the step S20 includes:

S21. Pretreating the surface of the pipe body;

S22. Apply flocking glue on the surface of the pretreated pipe body;

S23. Using a flocking machine to plant the fluff on the flocking glue;

S24, drying the flocking glue.

In this embodiment, the purpose of pretreating the surface of the tube body is to enhance the adhesion between the flocking glue and the surface of the tube body, so as to avoid the phenomenon that the flocking layer will partially or completely fall off after flocking.

In addition, the flocking principle of the flocking machine is usually: using the physical characteristics of the same-sex repulsion and the opposite-sex attraction, for example, the fluff can be negatively charged, and the tube body coated with flocking glue is placed at zero potential or Under the condition of grounding, in this way, the fluff is attracted by the body of the isopotential tube, accelerates to fly vertically to the flocking glue of the tube body, and the fluff is just vertically stuck on the flocking glue. Without loss of generality, the flocking glue can be, but not limited to, water-based polyurethane flocking glue.

The temperature insulation layer obtained in this embodiment is a flocking layer, and the flocking layer has a good temperature insulation effect and can well reduce the heat transfer rate between the inner surface and the outer surface of the air duct.

When the pipe body is configured as a bellows, optionally, before the step S21, the step S20 further includes:

S25. Straighten the pipe body.

It can be understood that after the corrugated pipe body is straightened, the surface of the pipe body can change from a corrugated surface to a flat surface, thereby facilitating the pretreatment of the surface of the pipe body.

Further, the step S21 includes:

S211, cleaning the surface of the pipe body.

By cleaning the surface of the tube body, the dirt on the surface of the tube body can be removed, thereby preventing the dirt from reducing the adhesion between the flocking glue and the surface of the tube body. Usually, the surface of the pipe body can be cleaned with a cleaning agent to clean the surface of the pipe body; in this case, after cleaning, the cleaning agent remaining on the surface of the pipe body needs to be air-dried.

Further, after the step S211, the step S21 also includes:

S212. Apply a primer on the surface of the cleaned pipe body.

The addition of a primer can increase the adhesion between the flocking glue and the surface of the tube body, thereby improving the structural stability of the product. Generally, the primer needs to be dried.

Further, the step S212 specifically includes:

S2121. Apply a first layer of primer on the surface of the cleaned pipe body, and bake the first layer of primer in an environment at a first preset temperature for a first preset time, so as to dry the first layer a layer of primer;

S2122. Apply a second layer of primer on the dried first layer of primer, and bake the second layer of primer in an environment at a second preset temperature for a second preset time to bake Dry the second layer of primer;

Wherein, both the first preset temperature and the second preset temperature are lower than the temperature upper limit of the service temperature range of the material of the pipe body.

Without loss of generality, taking the material of the pipe body as an example of PVC material, the use temperature of PVC material is generally between -15°C and 55°C, the difference between the first preset temperature and the second preset temperature The ranges are both from 48°C to 52°C, and both the first preset time and the second preset time are 3 minutes. It can be understood that, compared with the technical solution of directly applying a thicker layer of primer and using a higher baking temperature to bake for a longer time, this technical solution divides the primer into at least two layers for coating, A lower baking temperature and a shorter baking time are used respectively, which can not only make the primer dry, but also prevent the tube body from being damaged by an excessively high drying temperature, thereby avoiding a reduction in the service life of the tube body.

It should be noted that, in a specific embodiment taking PVC material as an example, the first preset temperature and the second preset temperature are the same, and the first preset time and the second preset time The time is also the same; but the present design is not limited thereto, in other embodiments, the first preset temperature and the second preset temperature may also be different, the first preset time and the second The preset times can also be different.

Further, the step S24 is specifically: baking the flocking glue for a third preset time in an environment at a third preset temperature, and performing ventilation treatment in the tube body during the baking process; Wherein, the third preset temperature is higher than the upper temperature limit of the service temperature range of the material of the pipe body.

Without loss of generality, still taking PVC as an example, the third preset temperature ranges from 75° C. to 85° C., and the third preset time is 30 minutes. In this embodiment, specifically, a ventilation device is connected in front of the tube body, and continuous ventilation is maintained in the tube body during the baking process. The temperature can be continuously lowered through the inside of the ventilation pipe body, so as to ensure that the material of the pipe body does not change color during the baking process.

Further, after the step S24, the step S20 also includes:

S26 , performing a floating fleece removal process on the flocking layer.

It can be understood that the floating fleece is fluff that is not firmly adhered to or not adhered to the flocking glue, and it is easy to fall off during use, thereby affecting user experience. In this embodiment, by removing the lint of the flocking layer, the phenomenon of lint shedding during the use of the air duct can be reduced, thereby improving user experience. Usually, the way to remove the lint can be by sucking the lint on the flocking layer by a suction device, blowing the lint on the flocking layer by a blower, or by cleaning the flocking layer. The way to wash off the lint, and use other feasible methods to clean the lint.

In another embodiment, the heat insulation material of the heat insulation layer is an air cushion, and the step S20 includes:

S21', cover the surface of the pipe body with the air cushion in the uninflated state, and fix it on the pipe body;

S22', inflating the air cushion.

It can be understood that when the insulation sheet is made of an air-filled cushion, the inflated air-filled cushion will expand and it is not easy to install. Therefore, the inflatable gasket is usually installed on the pipe body in an uninflated state, and then Inflating, in this way, on the one hand, it can prevent the inflated gasket from being difficult to install on the pipe body, and on the other hand, it can make the inflation gasket better adhere to the pipe body during the expansion process.

The present invention also proposes a mobile air conditioner, which includes an air conditioner body and an air duct. The specific structure of the air duct refers to the above-mentioned embodiment, or the air duct is prepared by the air duct preparation method of the above-mentioned embodiment. The air duct adopts all the technical solutions of all the above-mentioned embodiments, so it at least has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not repeat them here. Wherein, the air duct is connected with the air conditioner body.

The above is only a preferred embodiment of the present invention, and does not therefore limit the patent scope of the present invention. Under the inventive concept of the present invention, the equivalent structural transformation made by using the description of the present invention and the contents of the accompanying drawings, or direct/indirect use All other relevant technical fields are included in the patent protection scope of the present invention.

Claims (16)

1. An air duct, comprising:

the pipe body is provided with a first pipe orifice at one end and a second pipe orifice at the other end; and

and the heat insulation layer is arranged on the pipe body so as to reduce the heat transfer rate between the inner surface and the outer surface of the air pipe.

2. The air duct of claim 1, wherein the thermal barrier is disposed on an outer surface of the duct body; and/or

The first pipe orifice is connected with a first pipe joint; and/or

The second pipe orifice is connected with a second pipe joint; and/or

The tube body is configured as a bellows.

3. The air duct of claim 1, wherein the thermal barrier is configured as a flocked layer bonded to a surface of the duct body.

4. A duct according to claim 3, wherein the flocking layer comprises a first primer layer, a second primer layer, a flocking adhesive layer and fluff, the first primer layer, the second primer layer and the flocking adhesive layer being arranged in a stacked arrangement, the fluff being disposed on the flocking adhesive layer, the first primer layer being attached to the surface of the duct body.

5. The air duct of claim 1, wherein the thermal insulation layer is configured to be sleeved on a thermal insulation sleeve of the duct body.

6. The air duct of claim 1, wherein the thermal barrier is configured as a thermal barrier sheet wrapped around the duct body.

7. The air duct of claim 6, wherein the insulating sheet has opposite first and second sides, the insulating sheet being wrapped around the duct body, the first side being connected to the second side.

8. The duct of claim 7, wherein the first side edge and the second side edge are bonded by a velcro.

9. The air duct of any one of claims 5-8, wherein the end of the insulating layer adjacent the first nozzle and the end adjacent the second nozzle are secured to the duct body by a tie or strap or are adhered to the duct body by a velcro.

10. The air duct of any one of claims 5-8, wherein the thermal insulation material of the thermal insulation layer is configured as thermal insulation cotton or an inflatable cushion.

11. The preparation method of the air duct is characterized by comprising the following steps:

providing a tube body;

and a heat insulation layer is arranged on the pipe body.

12. The method of manufacturing an air duct of claim 11, wherein the thermal insulation layer is configured as a flocked layer, and the step of providing the thermal insulation layer on the duct body includes:

pretreating the surface of the pipe body;

coating flocking adhesive on the surface of the pretreated pipe body;

flocking the fluff onto the flocked adhesive with a flocking machine;

and drying the flocking adhesive.

13. The method of manufacturing an air duct of claim 12, wherein the step of pre-treating the surface of the duct body comprises:

coating a first layer of primer on the surface of the pipe body, and baking the first layer of primer for a first preset time in an environment with a first preset temperature so as to dry the first layer of primer;

coating a second layer of primer on the dried first layer of primer, and baking the second layer of primer for a second preset time in an environment with a second preset temperature so as to dry the second layer of primer;

the first preset temperature and the second preset temperature are both smaller than the upper limit of the use temperature range of the material of the pipe body.

14. The method for preparing an air duct according to claim 12, wherein the step of drying the flocking adhesive comprises the steps of: baking the flocking adhesive for a third preset time in an environment with a third preset temperature, and carrying out ventilation treatment in the pipe body in the baking process; wherein the third preset temperature is greater than the upper limit of the use temperature range of the material of the pipe body.

15. The method of claim 11, wherein the thermal insulation material of the thermal insulation layer is an inflatable cushion, and the step of pretreating the surface of the tube body comprises:

covering the surface of the pipe body with an inflatable cushion in an uninflated state, and fixing the inflatable cushion on the pipe body;

the inflatable cushion is inflated.

16. A mobile air conditioner comprising a duct according to any one of claims 1 to 10; alternatively, a duct comprising a duct produced by the duct production method of any one of claims 11 to 15.

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