WO2020077984A1 - Three-way valve, compressor assembly, refrigeration apparatus and control method therefor - Google Patents

Abstract

Disclosed are a three-way valve (100), a compressor assembly, a refrigeration apparatus and a control method for the refrigeration apparatus. The three-way valve (100) comprises a valve body (10), a valve core (20), an elastic member (30) and a pilot valve (40). The valve body (10) is provided with a cavity body (110), an inlet (101) in communication with the cavity body (110), a first outlet (102) and a second outlet (103), wherein the inlet (101) is in communication with the first outlet (102) and the second outlet (103) in a switching manner. The valve core (20) has a first position for making the inlet (101) be in communication with the first outlet (102), and a second position for making the inlet (101) be in communication with the second outlet (103). The elastic member (30) often drives the valve core (20) to move toward the first position. The pilot valve (40) drives the valve core (20) to move toward the second position.

Description

Three-way valve, compressor assembly, refrigeration device and control method thereof

Cross-reference of related applications

This application is based on a Chinese patent application with an application number of 201811209664.3 and an application date of October 17, 2018, and claims the priority of the aforementioned Chinese patent application. The entire content of the aforementioned Chinese patent application is hereby incorporated by reference.

Technical field

The present application relates to the technical field of refrigeration equipment, in particular to a three-way valve, compressor assembly, refrigeration device and control method thereof.

Background technique

In the refrigeration device, when the compressor is stopped after operation until it can be restarted, the pressure difference between the suction side and the discharge side of the compressor must reach a certain range before it can be restarted, especially for a large amount of refrigerant For a system equipped with a rotary compressor, the pressure difference must be within a small value (for example, 1kgf / cm ² ), otherwise the compressor will not be able to start, and the rapid restart function after shutdown will not be achieved.

On the other hand, when the compressor is stopped, the refrigerant in the high-pressure side heat exchanger will return to the low-pressure side through the gap of the compressor parts, thereby increasing the temperature and pressure in the low-pressure side heat exchanger. As a result, the heat in the high-pressure side heat exchanger is wasted and the cooling capacity in the low-pressure side heat exchanger is lost, which is not conducive to the operating efficiency of the refrigeration device.

In response to the above problems, installing a pressure control mechanism outside the compressor can effectively solve the problem of excessive pressure difference and poor startup. At the same time, rationally setting the pipeline can make the system high and low pressure can be maintained, and the system residual heat can be used. In the related art, a pilot-type three-way valve is used to control the starting pressure difference by controlling the pressure on the high and low pressure sides of the compressor. However, the three-way valve relies on the effect of high and low pressure difference. When there is no pressure difference in the system or the system pressure difference is less than the action pressure difference of the three-way valve, the three-way valve will not work properly. Back to normal.

Summary of the invention

This application aims to solve at least one of the technical problems in the related art. For this reason, the present application proposes a three-way valve for a compressor, which has the advantages of simple structure and reliable operation.

The present application also proposes a compressor assembly including the three-way valve for a compressor described above.

The present application also proposes a refrigeration device including the compressor assembly described above.

The present application also proposes a control method for a refrigeration device, which has the advantages of stable operation and high efficiency.

The three-way valve for a compressor according to an embodiment of the present application includes a valve body provided with a cavity and an inlet communicating with the cavity, a first outlet and a second outlet, the inlet being The first outlet and the second outlet are switched to communicate; a spool, the spool is movably disposed in the cavity, the spool has a first that communicates the inlet with the first outlet A position and a second position that connects the inlet and the second outlet; an elastic member, the elastic member is provided in the cavity, the elastic member often drives the valve core to move toward the first position; A pilot valve, the pilot valve communicates with the cavity, and the pilot valve drives the spool to move toward the second position.

According to the three-way valve for the compressor of the embodiment of the present application, by providing an elastic member in the valve body, the valve core can be constantly driven to return to the first position under the action of the elastic restoring force of the elastic member, so that the three-way valve can be made When there is no pressure difference or the pressure difference is small, the state in which the inlet is connected to the first outlet is maintained, which improves the reliability and stability of the three-way valve operation. Moreover, the pilot valve can conveniently drive the spool to switch to the second position, thereby improving the convenience and reliability of the three-way valve to switch between different communication states.

According to some embodiments of the present application, the valve core and the inner peripheral wall of the cavity define a first cavity, a second cavity, and a third cavity, the inlet, the first outlet, and the first Both outlets are in communication with the third chamber, the first chamber and the second chamber are located at both ends of the spool, the pilot valve and the first chamber and the second chamber The chambers are all connected to adjust the pressure difference across the valve core.

In some embodiments of the present application, there is one elastic member, and the elastic member is located in the first chamber or the second chamber.

According to some embodiments of the present application, the elastic member includes a first elastic member and a second elastic member, the first elastic member is disposed in the first cavity, and the second elastic member is disposed in the second In the chamber, the first elastic member and the second elastic member cooperate to constantly drive the spool toward the first position.

In some embodiments of the present application, the valve core includes: a body portion, the body portion is movably disposed in the cavity to block the first outlet or the second outlet; the first stop Parts and a second stop part, the first stop part and the second stop part are respectively provided at both ends of the body part, the first stop part and the second stop part are respectively Abut against the inner peripheral wall of the cavity to define the first cavity and the second cavity.

According to some embodiments of the present application, the inner peripheral wall of the cavity is provided with a limiter, the limiter cooperates with the first stopper and / or the second stopper to limit the valve core Movement displacement.

In some embodiments of the present application, the pilot valve includes: a pilot valve body having a pilot valve cavity and a first air inlet port, a second air inlet port and a second air inlet port communicating with the pilot valve cavity An air outlet and a second air outlet, the first air outlet and the second air outlet communicate with the first chamber and the second chamber respectively; a pilot spool, the pilot spool is movable Is provided in the pilot valve cavity so that the first air inlet communicates with the first air outlet, the second air inlet communicates with the second air outlet, or the first The air inlet communicates with the second air inlet, the second air inlet communicates with the first air outlet; an electromagnetic coil, the electromagnetic coil is connected to the pilot spool to drive the pilot spool mobile.

The compressor assembly according to the embodiment of the present application includes: a compressor having an exhaust port and an air return port; a three-way valve, the three-way valve is the three-way valve for a compressor described above, The inlet is in communication with the exhaust port, and the second outlet is in communication with the return air port.

According to the compressor assembly of the embodiment of the present application, by providing a three-way valve, when the compressor stops operating, the exhaust port and the return air port can be communicated through the three-way valve, thereby, the exhaust port and the return air port can be connected The differential pressure is quickly reduced and balanced, shortening the waiting time for the compressor to start again, and improving the working efficiency of the compressor. Moreover, when the compressor stops running, the three-way valve disconnects the communication between the inlet and the first outlet, which can prevent the high-temperature refrigerant in the heat exchanger from flowing back to the low-temperature refrigerant area, so that the heat of the refrigerant is fully utilized. Improve the energy efficiency of the compressor.

A refrigeration device according to an embodiment of the present application includes: a compressor assembly, the compressor assembly is the compressor assembly described above; a first heat exchanger, the first heat exchanger is connected to the first through a high-pressure gas pipe The outlet communicates; the second heat exchanger, one end of the second heat exchanger communicates with the first heat exchanger, and the other end of the second heat exchanger communicates with the air return port through a low-pressure gas pipe.

According to the refrigeration device of the embodiment of the present application, when the compressor is stopped, the exhaust port and the return port of the compressor can be directly communicated through the three-way valve, so that the pressure difference between the exhaust port and the return port can be quickly balanced Reduce, shorten the time for the compressor to start again. Moreover, after the compressor stops, the three-way valve disconnects the compressor and the high-pressure gas pipe, which can avoid the waste of heat caused by the high-temperature refrigerant in the high-pressure gas pipe flowing back to the low temperature area, and improve the working efficiency and energy of the refrigeration device. Utilization.

According to a control method of a refrigeration device according to an embodiment of the present application, the refrigeration device is the refrigeration device described above, and the control method includes: the elastic member drives the spool to the first position to start the compression When the compressor is turned off, the pilot valve drives the spool in the second position to communicate the exhaust port and the air return port.

According to the control method of the refrigeration device of the embodiment of the present application, by controlling the communication state of the three-way valve, when the compressor is in a stopped state, the exhaust port and the return air port of the compressor can be directly communicated to quickly reduce the exhaust port The pressure difference between the and the air return port shortens the compressor restart time and improves the working efficiency of the compressor. Moreover, after the compressor stops running, the three-way valve can cut off the communication between the compressor and the high-pressure gas pipe, to avoid the high-temperature refrigerant in the high-pressure gas pipe returning to the low temperature area and causing the waste of the heat of the refrigerant.

Additional aspects and advantages of the present application will be partially given in the following description, and some will become apparent from the following description, or be learned through practice of the present application.

BRIEF DESCRIPTION

The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

1 is a schematic structural view of a three-way valve for a compressor according to an embodiment of the present application;

2 is a schematic structural diagram of a three-way valve for a compressor according to an embodiment of the present application;

3 is a cross-sectional view of a three-way valve for a compressor according to an embodiment of the present application, where the valve core is in the first position;

4 is a cross-sectional view of a three-way valve for a compressor according to an embodiment of the present application, in which the valve core is in the second position;

5 is a cross-sectional view of a three-way valve for a compressor according to an embodiment of the present application, where the valve core is in the first position;

6 is a cross-sectional view of a three-way valve for a compressor according to an embodiment of the present application, in which the valve core is in the second position;

7 is a cross-sectional view of a three-way valve for a compressor according to an embodiment of the present application, wherein the valve core is in the first position;

8 is a cross-sectional view of a three-way valve for a compressor according to an embodiment of the present application, where the valve core is in the second position;

9 is a schematic structural diagram of a compressor assembly according to an embodiment of the present application.

Reference mark:

Three-way valve 100,

Valve body 10, inlet 101, first outlet 102, second outlet 103, cavity 110, first chamber 111, second chamber 112, third chamber 113, stopper 120,

Spool 20, body portion 210, first stop portion 220, second stop portion 230,

The elastic member 30, the first elastic member 310, the second elastic member 320,

The pilot valve 40, the pilot valve body 410, the first air inlet 411, the second air inlet 412, the first air outlet 413, the second air outlet 414, and the solenoid 420.

Compressor 50, exhaust port 510, return air port 520,

The reservoir 60, the suction pipe 610.

detailed description

The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the drawings, in which the same or similar reference numerals indicate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary, and are only used to explain the present application, and cannot be construed as limiting the present application.

In the description of this application, it should be understood that the terms "length", "upper", "lower", "front", "back", "left", "right", "top", "bottom", " The orientation or positional relationship indicated by "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, only for the convenience of describing this application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific The orientation, construction and operation in a specific orientation cannot be understood as a limitation of this application. In addition, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, the meaning of "plurality" is two or more.

In the description of this application, it should be noted that, unless otherwise clearly specified and defined, the terms "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or a whole Ground connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, or it can be the connection between two components. For those of ordinary skill in the art, the specific meaning of the above terms in this application can be understood in specific situations.

The three-way valve 100, compressor assembly, refrigeration device, and control method thereof according to embodiments of the present application are described below with reference to FIGS. 1-9.

As shown in FIGS. 1-4, the three-way valve 100 for a compressor 50 according to an embodiment of the present application includes a valve body 10, a valve core 20, an elastic member 30, and a pilot valve 40.

For example, as shown in FIGS. 3 and 4, the valve body 10 is provided with a cavity 110 and an inlet 101 communicating with the cavity 110, a first outlet 102 and a second outlet 103, the inlet 101 and the first outlet 102 and the second outlet 103 Switch to connect. Thus, fluid can flow into the cavity 110 from the inlet 101, fluid in the cavity 110 can flow out from the first outlet 102, or fluid in the cavity 110 can also flow out from the second outlet 103.

As shown in FIG. 3, when the inlet 101 communicates with the first outlet 102, fluid can flow into the cavity 110 from the inlet 101 and out of the cavity 110 from the first outlet 102; as shown in FIG. 4, when the inlet 101 and the second outlet When 103 is in communication, fluid can flow into the cavity 110 from the inlet 101 and flow out of the cavity 110 from the second outlet 103. Thereby, different flow paths of fluid can be switched.

As shown in FIGS. 3 and 4, the spool 20 is movably disposed in the cavity 110, and the spool 20 has a first position that communicates the inlet 101 with the first outlet 102 and that communicates the inlet 101 with the second outlet 103 The second position. In other words, different communication states of the three-way valve 100 can be realized by controlling the movement of the spool 20 in the cavity 110.

As shown in FIG. 3, when the spool 20 is in the first position, the inlet 101 can communicate with the first outlet 102, and the inlet 101 is disconnected from the second outlet 103; as shown in FIG. 4, when the spool 20 is in the second position In position, the inlet 101 can communicate with the second outlet 103, and the inlet 101 can be disconnected from the first outlet 102. Thus, by moving the spool 20, the communication state of the three-way valve 100 can be easily switched.

As shown in FIGS. 3 and 4, the elastic member 30 is disposed in the cavity 110, and the elastic member 30 often drives the spool 20 to move toward the first position. It should be noted that “the elastic member 30 often drives the spool 20 to move toward the first position” can be understood as that, under the action of the elastic restoring force of the elastic member 30, the elastic member 30 can drive the spool 20 to switch to The first position. 3 and 4, when the valve core 20 is switched from the first position to the second position, the valve core 20 presses the elastic member 30 to cause elastic deformation. Under the action of the elastic restoring force of the elastic member 30, the elastic member 30 can drive the spool 20 to return from the second position to the first position.

As shown in FIG. 1, the pilot valve 40 communicates with the cavity 110, and the pilot valve 40 drives the spool 20 to move toward the second position. In other words, under the action of the pilot valve 40, the spool 20 can overcome the elastic force of the elastic member 30 and switch from the first position to the second position, so that the three-way valve 100 can be switched to the inlet 101 and the second outlet 103 Connected state.

According to the three-way valve 100 for the compressor 50 according to the embodiment of the present application, by providing the elastic member 30 in the valve body 10, the valve core 20 can be constantly driven to return to the first position under the action of the elastic restoring force of the elastic member 30 Therefore, when there is no pressure difference or the pressure difference is small, the three-way valve 100 can maintain the state where the inlet 101 and the first outlet 102 are in communication, thereby improving the reliability and stability of the operation of the three-way valve 100. Moreover, the pilot valve 40 can conveniently drive the spool 20 to switch to the second position, thereby improving the convenience and reliability of the three-way valve 100 to switch between different communication states.

According to some embodiments of the present application, as shown in FIGS. 3-8, the inner wall of the valve core 20 and the cavity 110 defines a first chamber 111, a second chamber 112, and a third chamber 113, an inlet 101, The first outlet 102 and the second outlet 103 are both in communication with the third chamber 113. The first chamber 111 and the second chamber 112 are located at both ends of the valve core 20. As shown in FIG. 1, the pilot valve 40 and the first chamber The chamber 111 and the second chamber 112 are both in communication to adjust the pressure difference across the spool 20.

It should be noted that, as shown in FIGS. 3 to 8, the valve core 20 and the inner peripheral wall of the cavity 110 may define a first cavity 111, a second cavity 112, and a third cavity 113 that are isolated from each other. Among them, the first chamber 111 and the second chamber 112 are located at both ends of the third chamber 113. By connecting the pilot valve 40 to the first chamber 111 and the second chamber 112, the pressure in the first chamber 111 and the second chamber 112 can be adjusted by the pilot valve 40, so that the pressure difference across the spool 20 can be adjusted. Make adjustments. It can be understood that when there is a pressure difference across the spool 20, the spool 20 can be driven to move under the effect of the pressure difference, so that the spool 20 can be conveniently and reliably switched between the first position and the second position . Thus, the reliability and convenience of the three-way valve 100 switching between different communication states are improved.

In some embodiments of the present application, as shown in FIGS. 3-6, there may be one elastic member 30, and the elastic member 30 is located in the first chamber 111 or the second chamber 112.

That is, an elastic member 30 may be provided in the first chamber 111. As shown in FIGS. 5 and 6, an elastic member 30 is provided in the first chamber 111, and the elastic member 30 may be a spring. As shown in FIG. 5, when the spool 20 is not subjected to external force or the external force is small, the elastic member 30 pulls the spool 20 so that the spool 20 is in the first position, that is, the three-way valve 100 is at the inlet 101 and the first outlet 102 Connected state. As shown in FIG. 6, when the spool 20 is subjected to a large external force, for example, when the pressure in the first chamber 111 is greater than the pressure in the second chamber 112, the pressure difference across the spool 20 overcomes the elastic member The elastic force of 30 pulls the elastic member 30 to generate elastic deformation, and switches the valve core 20 to the second position, so that the three-way valve 100 is in a state where the inlet 101 and the second outlet 102 are in communication. When the pressure difference across the spool 20 is reduced to be less than the elastic restoring force of the elastic member 30, under the action of the elastic restoring force of the elastic member 30, the elastic member 30 can pull the spool 20 from the second position to the second position One location.

Of course, as shown in FIGS. 3 and 4, an elastic member 30 may also be provided in the second chamber 112. As shown in FIG. 3, when the spool 20 has no external force or the external force has little effect, the elastic member 30 pushes the spool 20 to the first position. At this time, the inlet 101 communicates with the first outlet 102. As shown in FIG. 4, when the spool 20 is subjected to external force. For example, when the pressure in the first chamber 111 is greater than the pressure in the second chamber 112, the pressure difference across the valve core 20 overcomes the elastic force of the elastic member 30, squeezes the elastic member 30 to cause elastic deformation, and causes The core 20 is switched from the first position to the second position. When the pressure difference between the two ends of the spool 20 is smaller than the elastic restoring force of the elastic member 30, under the action of the elastic restoring force of the elastic member 30, the elastic member 30 can drive the spool 20 to return from the second position to the first position.

According to some embodiments of the present application, as shown in FIGS. 7 and 8, the elastic member 30 may include a first elastic member 310 and a second elastic member 320. The first elastic member 310 is disposed in the first chamber 111 and the second The elastic member 320 is disposed in the second chamber 112, and the first elastic member 310 and the second elastic member 320 cooperate to constantly drive the valve core 20 to move toward the first position. As a result, the three-way valve 100 can maintain the state where the inlet 101 and the first outlet 102 communicate with each other when there is no external force or the external force received is small, thereby improving the stability and reliability of the operation of the three-way valve 100 Sex.

As shown in FIGS. 7 and 8, the first elastic member 310 is provided in the first chamber 111, and the second elastic member 320 is provided in the second chamber 112. Both the first elastic member 310 and the second elastic member 320 are springs. When the spool 20 has no external force or receives little external force, the first elastic member 310 pulls the spool 20 to the left, or the second elastic member 320 pushes the spool 20 to the left, so that the spool 20 is in the first position, so that the inlet 101 communicates with the first outlet 102.

When the spool 20 is subjected to a large external force, for example, when the pressure in the first chamber 111 is greater than the pressure in the second chamber 112, the pressure difference across the spool 20 overcomes the first elastic member 310 and the second The elastic force of the elastic member 320 switches the spool 20 to the second position, so that the inlet 101 communicates with the second outlet 103. When the pressure difference across the spool 20 is less than the sum of the elastic restoring forces of the first elastic member 310 and the second elastic member 320, under the synergy of the first elastic member 310 and the second elastic member 320, the spool 20 The two positions are reset to the first position, so that the inlet 101 communicates with the first outlet 102.

In some embodiments of the present application, as shown in FIGS. 3-8, the valve core 20 may include: a body portion 210, a first stop portion 220 and a second stop portion 230. The body portion 210 is movably disposed in the cavity 110 to block the first outlet 102 or the second outlet 103. It should be noted that, as shown in FIGS. 3-8, the body portion 210 can move in the left-right direction within the cavity 110. As shown in FIG. 3, when the body portion 210 moves to the first position, the body portion 210 can be sealed Blocking the second outlet 103 allows the inlet 101 to communicate with the first outlet 102; when the body portion 210 moves to the second position, the body portion 210 can block the first outlet 102 and allow the inlet 101 to communicate with the second outlet 103. Thereby, the main body 210 can move left and right within the cavity 110, and the communication state of the three-way valve 100 can be switched conveniently and reliably.

As shown in FIGS. 3-8, the first stop portion 220 and the second stop portion 230 are respectively provided at both ends of the body portion 210, that is, the first stop portions 220 and Second stop 230. As shown in FIGS. 3 to 8, the valve body 10 may be provided in a hollow cylindrical shape, and the first stop portion 220 and the second stop portion 230 are provided in a cylindrical shape matching the cavity 110, the first The stopper 220 and the second stopper 230 respectively abut against the inner peripheral wall of the cavity 110 to define the first chamber 111 and the second chamber 112. Thereby, the first chamber 111, the second chamber 112, and the third chamber 113 can be isolated from each other, so that it can be driven by adjusting the pressure in the first chamber 111 and the second chamber 112 at both ends of the body portion 210 Movement of the body part 210.

According to some embodiments of the present application, as shown in FIGS. 3-8, the inner peripheral wall of the cavity 110 may be provided with a limiting portion 120, for example, the limiting portion 120 may be convex on the inner peripheral wall of the cavity 110 toward the interior of the cavity 110 Raised bumps. The limit portion 120 cooperates with the first stop portion 220 and / or the second stop portion 230 to limit the displacement of the valve core 20. That is to say, the limit portion 120 can cooperate with the first stop portion 220 to limit the movement displacement of the spool 20; the limit portion 120 can also cooperate with the second stop portion 230 to limit the movement displacement of the spool 20; of course In addition, the limiting portion 120 can also cooperate with the first stop portion 220 and the second stop portion 230 to limit the displacement of the valve core 20.

For example, there may be one limiter 120, and the limiter 120 is disposed near the first stop 220. When the spool 20 moves to a predetermined distance, the first stop portion 220 abuts the limit portion 120 to restrict the movement of the spool 20; the limit portion 120 may also be disposed close to the second stop portion 230, when the valve When the core 20 moves to a predetermined distance, the second stopper 230 can abut against the limiter 120 to limit the movement of the valve core 20; the limiter 120 can also extend along the length of the cavity 110 and the limiter 120 The two ends of the are located near the first stop 220 and the second stop 230 respectively. When the limiter 120 moves to a predetermined distance, the first stop 220 or the second stop 230 may be connected to the limiter 120 The ends of are offset to limit the displacement of the spool 20. Of course, there may be more than one limiter 120, part of the limiter 120 is located close to the first stopper 220, and part of the limiter 120 is closer to the second stopper 230. Therefore, when the spool 20 moves to a predetermined distance At this time, the limiting portion 120 may abut the first stop portion 220 or the second stop portion 230 to limit the movement and displacement of the spool 20. Thus, the valve core 20 can be stopped at a predetermined position, and the switching of the communication state of the three-way valve 100 can be more accurate and reliable.

In some embodiments of the present application, as shown in FIG. 1, the pilot valve 40 may include: a pilot valve body 410, a pilot valve core, and a solenoid 420.

The pilot valve body 410 has a pilot valve cavity and a first air inlet 411, a second air inlet 412, a first air outlet 413 and a second air outlet 414 communicating with the pilot valve cavity, the first air outlet 413 and the second The two air outlets 414 communicate with the first chamber 111 and the second chamber 112, respectively. Thus, fluid can flow into the pilot valve cavity from the first air inlet 411 or the second air inlet 412, and the fluid in the pilot valve cavity can flow into the first chamber 111 from the first air outlet 413 or from the second air outlet 414 flows into the second chamber 112. Therefore, the pressure difference across the spool 20 can be adjusted by adjusting the pressure in the first chamber 111 and the second chamber 112.

The pilot valve core is movably arranged in the pilot valve cavity, so that the first air inlet 411 communicates with the first air outlet 413, the second air inlet 412 communicates with the second air outlet 414, or the first air inlet 411 communicates with the second air inlet 412, and the second air inlet 412 communicates with the first air outlet 413. In other words, the pilot valve core can be moved in the pilot valve cavity to make the pilot valve 40 communicate with the first air inlet 411 and the first air outlet 413, and the second air inlet 412 and the second air outlet 414. Or by the movement of the pilot spool, the first air outlet 413 communicates with the second air outlet 414, and the second air inlet 412 communicates with the first air outlet 413. Thereby, the convenience and convenience of switching between the communication states of the pilot valve 40 can be improved.

The solenoid 420 is connected to the pilot spool to drive the pilot spool to move. It should be noted that when power is supplied to the electromagnetic coil 420, the electromagnetic force of the electromagnetic coil 420 can be used to drive the pilot spool to switch between different communication states of the pilot spool, thereby improving the switching between the communication states of the pilot spool Convenience and reliability.

As shown in FIG. 9, according to the compressor assembly of the embodiment of the present application, the compressor assembly includes: a compressor 50 and a three-way valve 100. The compressor 50 has an exhaust port 510 and a return air port 520. The three-way valve 100 is the three-way valve 100 described above for the compressor 50. The inlet 101 communicates with the exhaust port 510, and the second outlet 103 communicates with the return air port 520. Connected.

It should be noted that when the compressor 50 is in a normal operating state, the inlet 101 of the three-way valve 100 communicates with the first outlet 102. The first outlet 102 of the three-way valve 100 can be connected to the heat exchanger, so that the high temperature and high pressure refrigerant flowing out of the compressor 50 can flow to the heat exchanger through the inlet 101 and the first outlet 102, and the refrigerant after heat exchange can be returned from The air port 520 is returned to the compressor 50 to exchange heat of the refrigerant and circulate the refrigerant.

When the compressor 50 stops operating, the three-way valve 100 switches to the communication state of the inlet 101 and the second outlet 103, and the exhaust port 510 and the return air port 520 of the compressor 50 pass through the inlet 101 and the second port of the three-way valve 100 The outlet 103 is directly connected. As a result, the pressure difference between the exhaust port 510 and the return air port 520 of the compressor 50 can be quickly balanced and reduced, and the pressure difference between the exhaust port 510 and the return air port 520 can be quickly reached and the compressor 50 can be restarted. Within the range of values, so that the time required for the compressor 50 to start again can be shortened.

According to the compressor assembly of the embodiment of the present application, by providing the three-way valve 100, when the compressor 50 stops operating, the exhaust port 510 can be communicated with the return air port 520 through the three-way valve 100, thereby the exhaust port can be made The pressure difference between 510 and the return air port 520 is quickly balanced and reduced, shortening the waiting time for the compressor 50 to start again, and improving the working efficiency of the compressor 50. Moreover, when the compressor 50 stops operating, the three-way valve 100 disconnects the communication between the inlet 101 and the first outlet 102, which can prevent the high-temperature refrigerant in the heat exchanger from flowing back to the low-temperature refrigerant area, so that the heat of the refrigerant is obtained Full utilization improves the energy efficiency of the compressor 50.

According to the refrigeration device of the embodiment of the present application, the refrigeration device includes: a compressor assembly, a first heat exchanger and a second heat exchanger. The compressor assembly is the compressor assembly described above. The first heat exchanger communicates with the first outlet 102 through a high-pressure gas pipe, one end of the second heat exchanger communicates with the first heat exchanger, and the other end of the second heat exchanger It communicates with the return air port 520 through a low-pressure air pipe.

It should be noted that when the compressor 50 is in a normal operating state, the inlet 101 of the three-way valve 100 communicates with the first outlet 102, and the inlet 101 of the three-way valve 100 is disconnected from the second outlet 103. At this time, the compressor The high-temperature and high-pressure refrigerant in 50 can flow through the exhaust port 510, the inlet 101 and the first outlet 102 to the high-pressure gas pipe in sequence, and then flow into the first heat exchanger and the second heat exchanger through the high-pressure gas pipe in sequence. The refrigerant enters the first exchange After the heat exchanger and the second heat exchanger exchange heat, they return to the compressor 50 from the air return port 520. Thus, the refrigerant heat exchange circulation flow of the refrigeration device is completed.

When the compressor 50 is in a stopped state, the three-way valve 100 disconnects the inlet 101 from the first outlet 102 and connects the inlet 101 to the second outlet 103. At this time, the exhaust port 510 and the return port 520 of the compressor 50 directly communicate through the three-way valve 100. Thereby, the pressure difference between the exhaust port 510 and the return air port 520 of the compressor 50 can be quickly reduced in balance, so that the compressor 50 can be restarted.

According to the refrigeration device of the embodiment of the present application, when the compressor 50 stops operating, the exhaust port 510 and the return air port 520 of the compressor 50 may be directly communicated through the three-way valve 100, so that the exhaust port 510 and the return air port 520 The pressure difference between them is quickly balanced to reduce the time for the compressor 50 to start again. Moreover, after the compressor 50 is stopped, the three-way valve 100 disconnects the compressor 50 and the high-pressure gas pipe, which can avoid the waste of heat caused by the high-temperature refrigerant in the high-pressure gas pipe flowing back to the low temperature area, which improves the operation of the refrigeration device Efficiency and energy utilization.

According to the method for controlling a refrigeration device according to an embodiment of the present application, the refrigeration device is the aforementioned refrigeration device, and the control method includes:

The elastic member 30 drives the spool 20 to be in the first position, whereby the inlet 101 of the three-way valve 100 can communicate with the first outlet 102 and the communication between the inlet 101 and the second outlet 103 can be disconnected. At this time, the compressor The exhaust port 510 of 50 is communicated with the high-pressure gas pipe through the three-way valve 100, and the compressor 50 is started, so that the refrigerant can circulate in the refrigeration device to perform the heat exchange cycle of the refrigerant.

When the compressor 50 is turned off, the pilot valve 40 drives the spool 20 in the second position. At this time, the inlet 101 of the three-way valve 100 is disconnected from the first outlet 102, and the inlet 101 is communicated with the second outlet 103 to communicate with the exhaust. The air port 510 and the return air port 520. As a result, the pressure difference between the return air port 520 and the exhaust gas can be quickly balanced and reduced, which facilitates the restart of the compressor 50.

According to the control method of the refrigeration device of the embodiment of the present application, by controlling the communication state of the three-way valve 100, when the compressor 50 is in a stopped state, the exhaust port 510 and the return air port 520 of the compressor 50 can be directly communicated to quickly The balance reduces the pressure difference between the exhaust port 510 and the return air port 520, shortens the restart time of the compressor 50, and improves the working efficiency of the compressor 50. Moreover, after the compressor 50 stops operating, the three-way valve 100 can cut off the communication between the compressor 50 and the high-pressure gas pipe to prevent the high-temperature refrigerant in the high-pressure gas pipe from flowing back to the low-temperature region and causing waste of heat of the refrigerant.

The refrigeration device according to the embodiment of the present application will be described in detail below with reference to FIGS. 1 to 9 in three specific embodiments. It should be understood that the following description is only an exemplary description, rather than a specific limitation on the present application.

Example one:

The refrigeration device includes: a compressor assembly, a first heat exchanger, a second heat exchanger, and a throttle assembly.

Among them, as shown in FIG. 9, the compressor assembly includes: a compressor 50, a three-way valve 100, an accumulator 60, etc. The compressor 50 is a rotary compressor 50, and the compressor 50 includes a housing, a motor assembly, and a compression assembly The housing defines a housing space. The motor assembly and the compression component are located in the housing space. The housing has an exhaust port 510 and a return air port 520 that communicate with the internal space. The exhaust port 510 is provided with an exhaust pipe, and the accommodating space and the exhaust pipe together constitute the high-pressure side of the compressor assembly.

The accumulator 60 is located outside the housing. The accumulator 60 communicates with the air return port 520 of the compressor 50. The accumulator 60 is provided with an air suction pipe 610. The air suction pipe 610 communicates with the low-pressure air pipe of the refrigeration device. The compressor 60 and the suction pipe 610 together constitute the low-pressure side of the compressor assembly.

As shown in FIGS. 1-4, the three-way valve 100 includes a main valve and a pilot valve 40. The main valve includes a valve body 10, a valve core 20, and an elastic member 30.

As shown in FIGS. 3 and 4, the valve body 10 is provided with a cavity 110 and an inlet 101 communicating with the cavity 110, a first outlet 102 and a second outlet 103, and the inlet 101 communicates with the exhaust port 510 of the compressor 50, The first outlet 102 communicates with the high-pressure side of the compressor assembly. For example, the inlet 101 of the three-way valve 100 can be connected to any position on the exhaust pipe of the compressor 50 and its extension pipe according to the actual piping of the system. The second outlet 103 communicates with the suction pipe 610 on the low-pressure side of the compressor assembly, and the inlet 101 communicates with the first outlet 102 and the second outlet 103, including but not limited to the reservoir 60 suction pipe 610, three-way valve 100 The second outlet 103 can be connected to any position on the low-pressure side of the compressor assembly. The connection between the inlet 101 and the high-pressure side of the compressor assembly is a series connection, and the connection between the second outlet 103 and the low-pressure side of the compressor assembly is a three-way pipe connection.

The spool 20 has a first position that communicates the inlet 101 with the first outlet 102 and a second position that communicates the inlet 101 with the second outlet 103. As shown in FIGS. 3 and 4, the valve core 20 includes a body portion 210, a first stop portion 220 and a second stop portion 230. The body portion 210 is movably disposed in the cavity 110 in the axial direction (ie, the left-right direction shown in FIGS. 3 and 4) to block the first outlet 102 or the second outlet 103.

The first stop portion 220 and the second stop portion 230 are respectively provided at both ends of the body portion 210, and the first stop portion 220 and the second stop portion 230 respectively abut against the inner peripheral wall of the cavity 110 to define the first The chamber 111, the second chamber 112 and the third chamber 113, the first chamber 111 and the second chamber 112 are located at both ends of the spool 20, the inlet 101, the first outlet 102 and the second outlet 103 are all The three chambers 113 are in communication. The inner peripheral wall of the cavity 110 is provided with a limiter 120. When the valve core 20 moves to a predetermined distance in the cavity 110, the limiter 120 abuts the first stopper 220 or the second stopper 230 to restrict the valve The displacement of the core 20.

As shown in FIGS. 3 and 4, the elastic member 30 is a spring. The elastic member 30 is disposed in the second chamber 112. The elastic member 30 often drives the valve core 20 to move toward the first position.

As shown in FIG. 1, the pilot valve 40 includes a pilot valve body 410, a pilot spool, a solenoid 420, and a controller. The pilot valve body 410 has a pilot valve cavity and a first air inlet 411, a Two air inlets 412, a first air outlet 413, and a second air outlet 414. The first air inlet 411 communicates with the high-pressure gas pipe through a capillary, and the second air inlet 412 communicates with the low-pressure gas pipe through a capillary. The first air outlet 413 and the second air outlet 414 communicate with the first chamber 111 and the second chamber 112 through capillaries, respectively, to adjust the pressure difference across the valve core 20. The pilot valve core is movably arranged in the pilot valve cavity, so that the first air inlet 411 communicates with the first air outlet 413, the second air inlet 412 communicates with the second air outlet 414, or the first air inlet 411 communicates with the second air inlet 412, the second air inlet 412 communicates with the first air outlet 413, the controller is connected to the solenoid 420 to supply power to the solenoid 420, and the solenoid 420 is connected to the pilot spool to drive the pilot spool mobile.

In the related art, when the compressor is stopped, the high-pressure side heat exchanger with a large volume communicates with the high-pressure side of the compressor, so that the high-pressure side and the low-pressure side of the compressor assembly flow through the gap of the compression mechanism and the throttle member It takes a long time to achieve pressure balance. For example, in a refrigeration device that uses a non-leakage expansion valve as a throttling component, under normal circumstances, under normal operating conditions, the equilibrium time of the high-pressure side and the low-pressure side is about 30 minutes. It is difficult for the compressor to start again in a short period of time (for example, within 5 minutes).

In the refrigeration device of the present application, after the compressor 50 is stopped, the three-way valve 100 is switched to the inlet 101 and the second outlet 103 to communicate, so that the high-pressure side and the low-pressure side of the compressor assembly are directly communicated. Smaller, the high-pressure side and the low-pressure side of the compressor assembly can quickly achieve pressure balance to meet the pressure difference (such as less than 1kgf / cm ² ) when the compressor 50 starts, so as to realize the function of rapid restart after the compressor 50 is stopped For example, it is possible to achieve the requirement of achieving pressure balance within 10S, thereby quickly restarting the compressor 50.

The specific control methods of the refrigeration device include:

When there is no pressure difference on both sides of the spool 20 or the pressure difference is relatively small (for example, the pressure difference is less than 0.4 MPa), the spool 20 is pushed under the action of the elastic restoring force of the elastic member 30 so that the spool 20 is in the first position. At this time, the three-way valve 100 is in a state where the inlet 101 and the first outlet 102 are in communication.

The compressor 50 is started, and the high-pressure refrigerant in the compressor 50 can flow from the exhaust port 510 of the compressor 50 through the inlet 101 and the first outlet 102 of the three-way valve 100 into the first heat exchanger and the second heat exchanger. The heat-exchanged refrigerant returns from the air return port 520 to the compressor 50 to realize the heat exchange circulation flow of the refrigerant.

When the compressor 50 is turned off, the controller supplies power to the pilot coil of the pilot valve 40, and the pilot valve 40 drives the spool 20 in the second position. At this time, the inlet 101 is disconnected from the first outlet 102 and communicates with the second outlet 103. The first heat exchanger maintains a high pressure state, so that the remaining heat of the first heat exchanger can still be released, and the second heat exchanger can still have the ability to absorb heat by evaporation. Thus, the remaining heat in the refrigeration device can be fully utilized, thereby improving the overall efficiency of the refrigeration device.

It should be noted that, when the compressor 50 is stopped, as described above, the exhaust port 510 and the return port 520 of the compressor 50 communicate through the three-way valve 100. When the compressor 50 is shut down for a long time (for example, the compressor 50 is shut down for more than 4 hours), the pressure difference ΔP between the high-pressure side and the low-pressure side of the compressor assembly decreases with time. When the pressure difference ΔP≤0.4MPa, the pressure difference Not enough to be less than the elastic restoring force of the elastic member 30, the spool 20 is switched to the first position state. As a result, the reliability of the three-way valve 100 is enhanced, and the compressor 50 is guaranteed to be disconnected between the exhaust port 510 and the return port 520 when the compressor 50 is started, ensuring the reliability of the operation of the entire refrigeration device. .

According to the refrigeration device of the present application, the dual effects of the system's residual heat utilization and rapid pressure balance can be achieved at the same time. It is particularly suitable for the occasions where the starting pressure difference is relatively sensitive, the starting torque is relatively large, and there is a requirement for rapid restart. The application of 50 is especially effective, with the advantages of good reliability, low cost, wide application range, simple and reliable control.

Example 2:

As shown in FIGS. 5 and 6, unlike the first embodiment, the elastic member 30 is disposed in the first chamber 111. When there is no pressure difference between the two ends of the spool 20 or the pressure difference is small, the elastic member 30 can pull the spool 20 to the first position under the action of the elastic restoring force of the elastic member 30.

Example three:

As shown in FIGS. 7 and 8, unlike Embodiment 1, in this embodiment, in this embodiment, the elastic member 30 includes a first elastic member 310 and a second elastic member 320, and the first elastic member 310 The second elastic member 320 is disposed in the first chamber 111, and the second elastic member 320 is disposed in the second chamber 112. When there is no pressure difference between the two ends of the spool 20 or the pressure difference is small, under the action of the elastic restoring forces of the first elastic member 310 and the second elastic member 320, the first elastic member 310 and the second elastic member 320 cooperate normally The spool 20 is driven toward the first position.

In the description of this specification, reference to the descriptions of the terms "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" is meant to be combined with the implementation The specific features, structures, materials, or characteristics described in the examples or examples are included in at least one embodiment or example of the present application. In this specification, the schematic expression of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

Although the embodiments of the present application have been shown and described, those of ordinary skill in the art may understand that various changes, modifications, replacements, and variations can be made to these embodiments without departing from the principle and purpose of the present application, The scope of the application is defined by the claims and their equivalents.

Claims (10)

A three-way valve for a compressor is characterized in that it includes: A valve body, the valve body is provided with a cavity and an inlet communicating with the cavity, a first outlet and a second outlet, and the inlet is switched in communication with the first outlet and the second outlet; A spool, the spool is movably disposed in the cavity, the spool has a first position that communicates the inlet with the first outlet, and a valve that communicates the inlet with the second outlet Second position An elastic member, the elastic member is provided in the cavity, the elastic member often drives the valve core to move toward the first position; A pilot valve, the pilot valve communicates with the cavity, and the pilot valve drives the spool to move toward the second position. The three-way valve for a compressor according to claim 1, wherein the valve core and the inner peripheral wall of the cavity define a first cavity, a second cavity, and a third cavity, so The inlet, the first outlet, and the second outlet are all in communication with the third chamber, the first chamber and the second chamber are located at both ends of the valve core, and the pilot valve Communicate with both the first chamber and the second chamber to adjust the pressure difference across the valve spool. The three-way valve for a compressor according to claim 2, wherein there is one elastic member, and the elastic member is located in the first chamber or the second chamber. The three-way valve for a compressor according to claim 2, wherein the elastic member includes a first elastic member and a second elastic member, the first elastic member is disposed in the first chamber, The second elastic member is provided in the second cavity, and the first elastic member and the second elastic member cooperate to constantly drive the valve core to move toward the first position. The three-way valve for a compressor according to any one of claims 2-4, wherein the valve core includes: A body portion, the body portion is movably disposed in the cavity to block the first outlet or the second outlet; A first stop portion and a second stop portion, the first stop portion and the second stop portion are respectively provided at both ends of the body portion, the first stop portion and the second stop portion The stop portions respectively abut against the inner peripheral wall of the cavity to define the first cavity and the second cavity. The three-way valve for a compressor according to claim 5, wherein a limit portion is provided on the inner peripheral wall of the cavity, the limit portion and the first stop portion and / or the The second stopper cooperates to limit the displacement of the spool. The three-way valve for a compressor according to claim 6, wherein the pilot valve includes: A pilot valve body having a pilot valve cavity and a first air inlet, a second air inlet, a first air outlet, and a second air outlet communicating with the pilot valve cavity, the first air outlet And the second air outlet are respectively communicated with the first chamber and the second chamber; A pilot spool, the pilot spool is movably disposed in the pilot valve cavity, so that the first air inlet and the first air outlet communicate with each other, the second air inlet and the first Two air outlets are in communication, or the first air inlet is in communication with the second air inlet, and the second air inlet is in communication with the first air outlet; An electromagnetic coil connected to the pilot spool to drive the pilot spool to move. A compressor assembly is characterized by comprising: A compressor, the compressor has an exhaust port and a return air port; The three-way valve is the three-way valve for a compressor according to any one of claims 1-7, the inlet is in communication with the exhaust port, and the second outlet is The air return port is connected. A refrigeration device is characterized by comprising: A compressor assembly, which is the compressor assembly according to claim 8; A first heat exchanger, the first heat exchanger communicates with the first outlet through a high-pressure gas pipe; In the second heat exchanger, one end of the second heat exchanger communicates with the first heat exchanger, and the other end of the second heat exchanger communicates with the return air port through a low-pressure gas pipe. A control method for a refrigeration device, wherein the refrigeration device is the refrigeration device according to claim 9, and the control method includes: The elastic member drives the spool in the first position to start the compressor; When the compressor is turned off, the pilot valve drives the spool to the second position to communicate the exhaust port and the air return port.

Images