Automatic reversing four-way valve

Abstract

The utility model relates to the technical field of valves, in particular to an automatic reversing four-way valve, which comprises an integrated valve body and at least four channels arranged on the valve body, two of the channels are externally communicated and are provided with expansion valves in series, and a valve plate component is arranged in the valve body to control the on-off of each channel so as to realize the purpose that when the direction of fluid externally connected with the valve body is changed, the valve plate component is opened and closed. The refrigerating and heating four-way valve is used for solving the problem that in the prior art, the fluid direction of the expansion valve is changed due to reversing of the refrigerating and heating four-way valve, and therefore stability of a refrigerating system is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to an automatic reversing four-way valve. Background Art

[0002] In the field of air conditioning, the expansion valve is an important component in the refrigeration system. It is mainly installed at the inlet of the evaporator to achieve throttling and control the flow of refrigerant. If the refrigerant is supplied too much, the liquid enters the compressor and is easy to burn the compressor, while too little supply will lead to insufficient cooling and heating. The Chinese utility model patent application with publication number CN114992823A discloses a four-way valve reversing adjustment method, device and air conditioning system. The patent application discloses that the A channel and the C channel of the four-way valve are connected to the high-pressure pipeline and the low-pressure pipeline of the compressor respectively, and the high-pressure pipeline and the low-pressure pipeline of the compressor are connected. There is an electronic expansion valve, and an evaporator and a condenser are arranged between the B channel and the D channel of the four-way valve in sequence, which is used to solve the problem of low service life of the connecting pipes caused by the reversing of the four-way valve. However, there are also the following problems: there is a defrosting process in the heating mode during the operation of the air conditioner. The four-way valve needs to be reversed each time the air conditioner switches between the cooling and heating modes, which causes the direction of the fluid in the expansion valve to change. The forward and reverse fluid flow rates of the expansion valve are insufficient, and the control curves are also different, so it will cause a huge deviation in the control accuracy of the expansion valve, resulting in damage to the compressor or poor cooling and heating effects. Utility Model Content

[0003] The utility model aims to provide an automatic reversing four-way valve, which is used to solve the technical problem in the prior art that the reversing of the cooling and heating four-way valve affects the change of the flow direction of the expansion valve, resulting in poor control accuracy, thereby affecting the life of the compressor or affecting the cooling and heating effect.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] An automatic reversing four-way valve comprises an integrated U-shaped valve body and at least four channels arranged on the four sides of the valve body, wherein two channels are input inlet and outlet channels, the two channels are externally connected and expansion valves are installed in series, and a valve plate assembly is arranged outside the valve body to control the on-off of each channel, so as to ensure that when the direction of the input fluid connected to the valve body changes, the fluid flow direction of the expansion valve remains unchanged.

[0006] Furthermore, the valve plate assembly adopts linkage interlocking or independent control to achieve closing of one channel when another channel is opened.

[0007] Furthermore, the valve plate assembly includes an A valve plate, a B valve plate and a main C valve plate. The valve body is provided with four channels respectively connected to an A pipe, a B pipe, a C pipe and a D pipe. The A valve plate is used to control the on-off of the channel between the A pipe and the B pipe, the B valve plate is used to control the on-off of the channel between the D pipe and the A pipe, and the main C valve plate is used to control the on-off of the channel between the B pipe and the C pipe and the on-off of the channel between the C pipe and the D pipe. An A guide shaft is installed between the A valve plate and the B valve plate to ensure that the opening and closing directions of the A valve plate and the B valve plate are opposite. A B guide shaft is provided on the main C valve plate. The B guide shaft is installed on the C valve seat and the D valve seat to provide guidance for the main C valve plate. At the same time, the on-off direction of the channel between the B pipe and the C pipe is opposite to the on-off direction of the channel between the C pipe and the D pipe.

[0008] Furthermore, a valve seat A, a valve seat B, a valve seat C and a valve seat D are provided inside the valve body, the valve plate A is sealingly mounted with the valve seat A and the valve plate A is located on the side close to the B pipe, the valve plate B is sealingly mounted with the valve seat B and the valve plate B is located on the side close to the D pipe, the A pipe is located between the valve plates A and B, the valve seat C is located close to the B pipe, the valve seat D is located close to the D pipe, the valve plate C is located between the valve seat C and the valve seat D and is sealingly mounted with the valve seat C and the valve seat D above and below respectively, the C pipe is located between the valve seat C and the valve seat D, the guide shaft A is slidingly mounted between the valve seat A and the valve seat B, and the guide shaft B is slidingly mounted between the valve seat C and the valve seat D.

[0009] Furthermore, the valve plate assembly includes valve plate A, valve plate B, valve plate C and valve plate D, and the valve body is provided with four channels respectively connected to pipe A, pipe B, pipe C and pipe D, the valve plate A is used to control the opening and closing of the channel between pipe A and pipe B, the valve plate B is used to control the opening and closing of the channel between pipe D and pipe A, the valve plate C is used to control the opening and closing of the channel between pipe B and pipe C, and the valve plate D is used to control the opening and closing of the channel between pipe C and pipe D.

[0010] Furthermore, a valve seat A, a valve seat B, a valve seat C and a valve seat D are provided inside the valve body, the valve plate A is installed in a sealing cooperation with the valve seat A and the valve plate A is located on the side close to the B connecting pipe, the valve plate B is installed in a sealing cooperation with the valve seat B and the valve plate B is located on the side close to the D connecting pipe, the valve plate C is located between the valve seat C and the valve seat D and is installed in a sealing cooperation with the valve seat C, and the valve plate D is located between the valve seat C and the valve seat D and is installed in a sealing cooperation with the valve seat D.

[0011] Furthermore, the A valve plate is hingedly mounted on the A valve seat, the B valve plate is hingedly mounted on the B valve seat, the C valve plate is hingedly mounted on the C valve seat, and the D valve plate is hingedly mounted on the D valve seat.

[0012] Furthermore, a first connecting rod is installed between the A valve plate and the B valve plate to ensure that the opening and closing directions of the A valve plate and the B valve plate are opposite, and a second connecting rod is installed between the C valve plate and the D valve plate to ensure that the opening and closing directions of the C valve plate and the D valve plate are opposite, and the two ends of the first connecting rod are respectively hinged to the middle of the A valve plate and the B valve plate, and the two ends of the second connecting rod are respectively hinged to the middle of the C valve plate and the D valve plate.

[0013] Furthermore, the A valve plate is installed in a sealing cooperation with the A valve seat through the D guide shaft, and the D guide shaft is slidably installed on the A valve seat, the B valve plate is installed in a sealing cooperation with the B valve seat through the C guide shaft, and the C guide shaft is slidably installed on the B valve seat, the C valve plate is installed in a sealing cooperation with the C valve seat through the E guide shaft, and the E guide shaft is slidably installed on the C valve seat, and the D valve plate is installed in a sealing cooperation with the D valve seat through the F guide shaft, and the F guide shaft is slidably installed on the D valve seat.

[0014] Furthermore, a spring or a magnetic component for resetting the A valve plate is installed between the A valve plate and the A valve seat, a spring or a magnetic component for resetting the B valve plate is installed between the B valve plate and the B valve seat, a spring or a magnetic component for resetting the C valve plate is installed between the C valve plate and the C valve seat, and a spring or a magnetic component for resetting the D valve plate is installed between the D valve plate and the D valve seat.

[0015] Furthermore, the A pipe and the C pipe are connected to the E pipe through an external pipe, and a F valve plate and an F valve seat that are sealed and fitted are arranged on the channel between the E pipe and the A pipe, and a G valve plate and a G valve seat that are sealed and fitted are arranged on the channel between the E pipe and the C pipe, and the F valve plate is located on the side close to the E pipe, and the G valve plate is located on the side close to the C pipe.

[0016] Furthermore, the ends of the A pipe, B pipe, C pipe and D pipe are all installed with transfer pipes that are easy to weld. The valve body is in the shape of a U-shape or a special-shaped structure that is beneficial to reducing fluid resistance and facilitating fluid flow or a special-shaped structure that is easy to process and produce. The A pipe, B pipe, C pipe and D pipe are respectively arranged on the four sides of the U-shape, and the axis of the A pipe coincides with the axis of the A valve plate, the axis of the B pipe coincides with the axis of the C valve plate, the axis of the D valve plate coincides with the axis of the C pipe, and the axis of the B valve plate coincides with the axis of the D pipe. A sensor for monitoring the position of each valve plate in the valve plate assembly is installed on the valve body, and the inner cavity of the valve body is provided with heat insulation and noise reduction material.

[0017] Compared with the prior art, the technical solution of the utility model has the following beneficial effects:

[0018] (1) The utility model sets a valve plate assembly to ensure that when the pressure difference of the fluid outside the valve body changes, the fluid direction of the expansion valve remains unchanged, thereby ensuring the stability of the expansion valve and making the flow control accuracy of the expansion valve more accurate, thereby avoiding the problem of affecting the life of the compressor or the cooling and heating effect due to the reversal of the four-way valve;

[0019] (2) The utility model realizes that one channel is opened while the other channel is closed by setting a linkage interlock or independent control method, so that the valve plate automatically switches the open and closed state when receiving the fluid pressure with a pressure difference. Compared with the traditional solenoid valve in the prior art, the utility model has higher cost and stability;

[0020] (3) The utility model is helpful to expand the use range of the valve by adding an E-connection pipe, and is suitable for air conditioners with cooling, heating and hot water modes;

[0021] (4) The utility model provides a transfer pipe to facilitate quick welding connection. The valve body is provided in a U-shaped shape to facilitate installation of the valve plate and valve seat inside the valve body. The special-shaped pipe is provided to reduce fluid resistance and improve valve efficiency. The sensor is provided to facilitate monitoring of the position of the valve plate. The heat-insulating and noise-reducing material is provided to increase the applicable range of the valve to the fluid temperature and reduce the noise during valve operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a structural schematic diagram of an automatic reversing four-way valve with an interlocking function in an up-in and down-out state in Example 1 of the utility model;

[0023] Figure 2 This is a structural schematic diagram of the automatic reversing four-way valve without an interlocking function in the second embodiment of the utility model;

[0024] Figure 3 This is a structural schematic diagram of the bottom-in and top-out state of the automatic reversing four-way valve plate hinge connection with an interlocking function and a transfer tube in the third embodiment of the utility model;

[0025] Figure 4 This is a structural schematic diagram of the automatic reversing four-way valve according to the fourth embodiment of the utility model, in which the valve plate is hingedly connected without an interlocking function;

[0026] Figure 5 This is a working principle diagram of the automatic reversing four-way valve in the upper inlet and lower outlet state in the first embodiment of the utility model;

[0027] Figure 6 This is a working principle diagram of the automatic reversing four-way valve in the bottom-in and top-out state in the first embodiment of the utility model;

[0028] Figure 7 This is a schematic diagram of the structure of an automatic reversing five-way valve according to Embodiment 5 of the present utility model.

[0029] In the figure, 1 is valve plate A; 2 is valve plate B; 3 is guide shaft A; 4 is valve seat A; 5 is valve seat B; 6 is main valve plate C; 7 is guide shaft B; 8 is valve seat C; 9 is valve seat D; 10 is valve body; 11 is pipe A; 12 is pipe B; 13 is pipe C; 14 is pipe D; 15 is transfer pipe; 16 is channel A; 17 is channel B; 18 is channel C; 19 is channel D; 20 is pipe E; 21 is first connecting rod; 22 is second connecting rod; 23 is valve plate F; 24 is valve plate G; 25 is expansion valve; 26 is guide hole; 27 is valve seat F; 28 is valve seat G; 31 is guide shaft C; 32 is guide shaft D; 61 is valve plate C; 62 is valve plate D; 71 is guide shaft E; 72 is guide shaft F. DETAILED DESCRIPTION

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] The drawings are for illustrative purposes only and should not be construed as limiting the present patent;

[0032] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments and are not intended to limit the embodiments of the present application. The singular forms "a", "the" and "the" used in the embodiments of the present application and the appended claims are not intended to limit the embodiments of the present application.

[0033] "The" is also intended to include plural forms, unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items.

[0034] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Instead, they are only examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims.

[0035] In the description of this application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0036] In addition, in the description of the present application, unless otherwise specified, "plurality" means two or more. "and / or",

[0037] Describing the association relationship of associated objects, it means that there can be three kinds of relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the previous and next associated objects are in an "or" relationship. The following is a further description of the present invention in conjunction with the accompanying drawings and embodiments.

[0038] In order to solve the limitations of the prior art, this embodiment provides a technical solution, and the technical solution of the utility model is further described below in conjunction with the drawings and embodiments.

[0039] The automatic reversing four-way valve involved in the utility model is mainly used in the field of air conditioning. The expansion valve 25 is generally installed in series in the loop of the air conditioning heat pump system to control the fluid flow. When the air conditioning mode changes the direction of the four-way valve, the fluid direction of the expansion valve 25 is easily changed with the reversal of the four-way valve, which may easily cause damage to the compressor or poor cooling and heating effects.

[0040] Embodiment 1

[0041] See attached Figure 1 An automatic reversing four-way valve includes an integrated mouth-shaped valve body 10 and four channels arranged on four sides of the valve body 10, two of which are input and output channels. Here, the input and output channels are two channels, when one of them is an input channel, the other is an output channel, the two channels are externally connected and an expansion valve 25 is installed in series, the inner cavity of the valve body 10 is coated with a heat-insulating and noise-reducing material, and the heat-insulating and noise-reducing material is preferably made of asbestos, polytetrafluoroethylene plastic, etc. Specifically, the four channels of the valve body 10 are respectively connected with an A pipe 11, a B pipe 12, a C pipe 13 and a D pipe 14, and the A pipe 11 and the B pipe 12 are connected to the four channels of the valve body 10. , C pipe 13 and D pipe 14 are respectively arranged on the four sides of the U-shaped valve body 10, wherein the A pipe 11 and the C pipe 13 are externally connected and the expansion valve 25 is installed in series. Specifically, the A pipe 11 is provided with an A channel 16, the B pipe 12 is provided with a B channel 17, the C pipe 13 is provided with a C channel 18, and the D pipe 14 is provided with a D channel 19. The valve body 10 is provided with a valve plate assembly to control the on-off of each channel, so as to realize that when the direction of the input fluid connected to the valve body 10 changes, the fluid flow direction of the expansion valve 25 remains unchanged. Specifically, the valve plate assembly adopts a linkage interlocking method to realize that when one channel is opened, the other channel is closed.

[0042] Specifically, the valve plate assembly includes an A valve plate 1, a B valve plate 2 and a main C valve plate 6. The A valve plate 1 is used to control the on-off of the channel between the A pipe 11 and the B pipe 12, that is, the on-off between the A channel 16 and the B channel 17. The B valve plate 2 is used to control the on-off of the channel between the D pipe 14 and the A pipe 11, that is, the on-off between the D channel 19 and the A channel 16. The on-off logic of the channel between the A pipe (11) and the B pipe (12) is opposite to the on-off logic of the channel between the D pipe (14) and the A pipe (11). The main C valve plate 6 is used to control the on-off of the channel between the B pipe 12 and the C pipe 13 and the on-off between the C pipe 13 and the D pipe 14. A guide shaft 3 is installed between the A valve plate 1 and the B valve plate 2 to ensure that the opening and closing directions of the A valve plate 1 and the B valve plate 2 are opposite, that is, the A valve plate 1 and the B valve plate 2 are always in a state where one is opened and the other is closed. A B guide shaft 7 is provided on the main C valve plate 6. The B guide shaft 7 is installed on the C valve seat 8 and the D valve seat 9 to provide guidance for the main C valve plate 6. At the same time, the channel between the B pipe 12 and the C pipe 13 is opposite to the channel between the C pipe 13 and the D pipe 14. That is, the position of the main C valve plate 6 is always between the B channel 17 and the C channel 18 or between the C channel 18 and the D channel 19.

[0043] Specifically, the valve body 10 is provided with an A valve seat 4, a B valve seat 5, a C valve seat 8 and a D valve seat 9, the A valve plate 1 is installed in a sealing manner with the A valve seat 4 and the A valve plate 1 is located on the side close to the B pipe 12, the B valve plate 2 is installed in a sealing manner with the B valve seat 5 and the B valve plate 2 is located on the side close to the D pipe 14, the A pipe 11 is located between the A valve plate 1 and the B valve plate 2, the C valve seat 8 is located close to the B pipe 12, the D valve seat 9 is located close to the D pipe 14, the main C valve plate 6 is located between the C valve seat 8 and the D valve seat 9 and is sealed with the C valve seat 8 and the D valve seat 9 at the top and bottom, respectively. The C pipe 13 is located between the C valve seat 8 and the D valve seat 9. The sealing installation here means that by installing a seal between the valve plate and the valve seat, the valve plate is sealed with the valve seat when it is closed. The A guide shaft 3 is installed in a sliding manner with the A valve seat 4 and the B valve seat 5, and the B guide shaft 7 is installed in a sliding manner with the C valve seat 8 and the D valve seat 9. The A valve seat 4, the B valve seat 5, the C valve seat 8 and the D valve seat 9 are all provided with guide holes 26. The A guide shaft 3 and the B guide shaft 7 are both installed in the guide block holes for respectively realizing the translation of the A valve plate 1 and the B valve plate 2 and the translation of the main C valve plate 6. In addition, the valve body 10 is installed with a sensor for monitoring the position of each valve plate in the valve plate assembly.

[0044] See attached Figure 5 and 6When the four-way valve is working, when the pressure of B pipe 12 is greater than the pressure of D pipe 14, the fluid enters from B pipe 12 through B channel 17 and acts on the main C valve plate 6 to make it press against the D valve seat 9, and then the fluid flows out through C channel 18, passes through the expansion valve 25, enters A pipe 11 through A channel 16, and acts on B valve plate 2 to make it away from B valve seat 5. At this time, B valve plate 2 opens, A valve plate 1 closes, and then the fluid flows out through D pipe 14; when the pressure of D pipe 14 is greater than the pressure of B pipe 12, the fluid flows out from D pipe 14. The fluid enters through the D channel 19 and acts on the main C valve plate 6 to make it press against the C valve seat 8. Then the fluid flows out through the C channel 18, passes through the expansion valve 25, and then enters the A pipe 11 through the A channel 16 and acts on the A valve plate 1 to make it away from the A valve seat 4. At this time, the A valve plate 1 is opened, the B valve plate 2 is closed, and then the fluid flows out through the B pipe 12. When the external four-way valve is reversed, no matter the fluid flows in from the B pipe 12 and flows out from the D pipe 14 or flows in from the D pipe 14 and flows out from the B pipe 12, the fluid direction of the expansion valve 25 remains unchanged, thereby ensuring the stability of the expansion valve 25 and making the flow control accuracy of the expansion valve 25 more accurate, thereby avoiding the problem of affecting the life of the compressor or affecting the cooling and heating effects due to the reversal of the four-way valve.

[0045] Embodiment 2

[0046] See attached Figure 3 , An automatic reversing four-way valve, comprising an integrated mouth-shaped valve body 10 and four channels arranged on four sides of the valve body 10, wherein two channels are input inlet and outlet channels, wherein the input inlet and outlet channels are two channels, when one of them is an input channel, the other is an output channel, the two channels are externally connected and an expansion valve 25 is installed in series, the inner cavity of the valve body 10 is coated with a heat-insulating and noise-reducing material, the heat-insulating and noise-reducing material is preferably made of asbestos, polytetrafluoroethylene plastics, etc., the four channels of the valve body 10 are respectively connected with an A pipe 11, a B pipe 12, a C pipe 13 and a D pipe 14, the A pipe 11, the B pipe 12, the C pipe 13 and the The D pipe 14 is respectively arranged on the four sides of the mouth-shaped valve body 10, wherein the A pipe 11 and the C pipe 13 are connected to the outside and the expansion valve 25 is installed in series, and a channel is arranged in each channel. Specifically, the A pipe 11 is provided with an A channel 16, the B pipe 12 is provided with a B channel 17, the C pipe 13 is provided with a C channel 18, and the D pipe 14 is provided with a D channel 19. The valve body 10 is provided with a valve plate assembly to control the opening and closing of each channel, so as to realize that when the pressure difference of the fluid connected to the valve body 10 changes, the fluid flow direction of the expansion valve 25 remains unchanged. Specifically, the valve plate assembly adopts a linkage interlocking method to realize that when one channel is opened, another channel is closed.

[0047] Specifically, the valve plate assembly includes an A valve plate 1, a B valve plate 2, a C valve plate 61 and a D valve plate 62. The A valve plate 1 is used to control the opening and closing of the channel between the A pipe 11 and the B pipe 12, the B valve plate 2 is used to control the opening and closing of the channel between the D pipe 14 and the A pipe 11, the C valve plate 61 is used to control the opening and closing of the channel between the B pipe 12 and the C pipe 13, and the D valve plate 62 is used to control the opening and closing of the channel between the C pipe 13 and the D pipe 14.

[0048] Specifically, an A valve seat 4, a B valve seat 5, a C valve seat 8 and a D valve seat 9 are provided inside the valve body 10, an A valve plate 1 is installed in a sealing manner with the A valve seat 4 and the A valve plate 1 is located on the side close to the B pipe 12, a B valve plate 2 is installed in a sealing manner with the B valve seat 5 and the B valve plate 2 is located on the side close to the D pipe 14, a C valve plate 61 is located between the C valve seat 8 and the D valve seat 9 and is installed in a sealing manner with the C valve seat 8, a D valve plate 62 is located between the C valve seat 8 and the D valve seat 9 and is installed in a sealing manner with the D valve seat 9, wherein one end of the A valve plate 1 is hingedly installed with the A valve seat 4, one end of the B valve plate 2 is hingedly installed with the B valve seat 5, one end of the C valve plate 61 is hingedly installed with the C valve seat 8, and one end of the D valve plate 62 is hingedly installed with the D valve seat 9.

[0049] Specifically, a first connecting rod 21 is installed between the A valve plate 1 and the B valve plate 2 to ensure that the opening and closing directions of the A valve plate 1 and the B valve plate 2 are opposite, and a second connecting rod 22 is installed between the C valve plate 61 and the D valve plate 62 to ensure that the opening and closing directions of the C valve plate 61 and the D valve plate 62 are opposite. The two ends of the first connecting rod 21 are respectively hinged to the middle of the A valve plate 1 and the B valve plate 2, and the two ends of the second connecting rod 22 are respectively hinged to the middle of the C valve plate 61 and the D valve plate 62.

[0050] In addition, the ends of the A pipe 11, the B pipe 12, the C pipe 13 and the D pipe 14 are all installed with a transfer pipe 15 for easy welding. The shape of the valve body 10 is a mouth-shaped structure that is convenient for quick welding connection or a special-shaped structure that is conducive to reducing fluid resistance and facilitating fluid flow or a special-shaped structure that is convenient for processing and production. The special-shaped structure here refers to Figure 2 The corners of the middle channel are set as rounded corners, which is beneficial to reducing fluid resistance and improving valve efficiency; the A pipe 11, the B pipe 12, the C pipe 13 and the D pipe 14 are respectively arranged on the four sides of the mouth shape, and the axis of the A pipe 11 coincides with the axis of the A valve plate 1, the axis of the B pipe 12 coincides with the axis of the C valve plate 61, the axis of the D valve plate 62 coincides with the axis of the C pipe 13, and the axis of the B valve plate 2 coincides with the axis of the D pipe 14, which is beneficial to the installation of the valve plate and valve seat inside the valve body 10. Figure 3 The fluid enters from the D pipe 14 and flows out from the B pipe 12.

[0051] Embodiment 3

[0052] See attached Figure 2An automatic reversing four-way valve comprises an integrated mouth-shaped valve body 10 and four channels arranged on four sides of the valve body 10, wherein two channels are input inlet and outlet channels, wherein the input inlet and outlet channels are two channels, when one of them is an input channel, the other is an output channel, the two channels are externally connected and an expansion valve 25 is installed in series, the inner cavity of the valve body 10 is coated with a heat-insulating and noise-reducing material, the heat-insulating and noise-reducing material is preferably made of polyurethane, polytetrafluoroethylene plastic, etc., the four channels of the valve body 10 are respectively connected with an A pipe 11, a B pipe 12, a C pipe 13 and a D pipe 14, the A pipe 11, the B pipe 12, the C pipe 13 and the The D pipes 14 are respectively arranged on the four sides of the U-shaped valve body 10, wherein the A pipe 11 and the C pipe 13 are connected to the outside and the expansion valve 25 is installed in series, and a channel is arranged in each pipe. Specifically, the A pipe 11 is provided with an A channel 16, the B pipe 12 is provided with a B channel 17, the C pipe 13 is provided with a C channel 18, and the D pipe 14 is provided with a D channel 19. The valve body 10 is provided with a valve plate assembly to control the opening and closing of each channel, so as to realize that when the pressure difference of the fluid connected to the valve body 10 changes, the fluid flow direction of the expansion valve 25 remains unchanged. Specifically, the valve plate assembly adopts an independent control method to realize that when one channel is opened, another channel is closed.

[0053] Specifically, the valve plate assembly includes an A valve plate 1, a B valve plate 2, a C valve plate 61 and a D valve plate 62. The A valve plate 1 is used to control the on-off of the channel between the A pipe 11 and the B pipe 12, the B valve plate 2 is used to control the on-off of the channel between the D pipe 14 and the A pipe 11, the C valve plate 61 is used to control the on-off of the channel between the B pipe 12 and the C pipe 13, and the D valve plate 62 is used to control the on-off of the channel between the C pipe 13 and the D pipe 14. Specifically, the valve body 10 is provided with a plurality of valve plates. The A valve seat 4, B valve seat 5, C valve seat 8 and D valve seat 9 are provided in the part, the A valve plate 1 is installed in a sealing cooperation with the A valve seat 4 and the A valve plate 1 is located on the side close to the B connecting pipe 12, the B valve plate 2 is installed in a sealing cooperation with the B valve seat 5 and the B valve plate 2 is located on the side close to the D connecting pipe 14, the C valve plate 61 is located between the C valve seat 8 and the D valve seat 9 and is installed in a sealing cooperation with the C valve seat 8, and the D valve plate 62 is located between the C valve seat 8 and the D valve seat 9 and is installed in a sealing cooperation with the D valve seat 9.

[0054] Specifically, the A valve plate 1 is installed in a sealing cooperation with the A valve seat 4 through the D guide shaft 32, and the D guide shaft 32 is slidably installed on the A valve seat 4, the B valve plate 2 is installed in a sealing cooperation with the B valve seat 5 through the C guide shaft 31, and the C guide shaft 31 is slidably installed on the B valve seat 5, the C valve plate 61 is installed in a sealing cooperation with the C valve seat 8 through the E guide shaft 71, and the E guide shaft 71 is slidably installed on the C valve seat 8, the D valve plate 62 is installed in a sealing cooperation with the D valve seat 9 through the F guide shaft 72, and the F guide shaft 72 is slidably installed on the D valve seat 9.

[0055] When the four-way valve is working, when the pressure of B pipe 12 is greater than the pressure of D pipe 14, the fluid enters from B pipe 12 through B channel 17 and acts on C valve plate 61 to make it press against D valve seat 9, and then the fluid flows out through C channel 18, passes through expansion valve 25, enters A pipe 11 through A channel 16, and acts on B valve plate 2 to make it away from B valve seat 5. At this time, B valve plate 2 opens, A valve plate 1 closes, and then the fluid flows out through D pipe 14; when the pressure of D pipe 14 is greater than the pressure of B pipe 12, the fluid flows out from D pipe 14. The fluid enters through the D channel 19 and acts on the D valve plate 62 to make it press against the C valve seat 8. Then the fluid flows out through the C channel 18, passes through the expansion valve 25, enters the A pipe 11 through the A channel 16, and acts on the A valve plate 1 to make it away from the A valve seat 4. At this time, the A valve plate 1 is opened, the B valve plate 2 is closed, and then the fluid flows out through the B pipe 12. When the four-way valve is reversed, no matter the fluid flows in from the B pipe 12 and flows out from the D pipe 14 or flows in from the D pipe 14 and flows out from the B pipe 12, the fluid direction of the expansion valve 25 remains unchanged, thereby ensuring the flow stability of the expansion valve 25, making the flow control accuracy of the expansion valve 25 more accurate, and avoiding the problem of affecting the life of the compressor or affecting the cooling and heating effects due to the reversal of the four-way valve.

[0056] Embodiment 4

[0057] See attached Figure 4 An automatic reversing four-way valve comprises an integrated mouth-shaped valve body 10 and four channels arranged on four sides of the valve body 10, wherein two channels are input inlet and outlet channels, wherein the input inlet and outlet channels are two channels, when one of them is an input channel, the other is an output channel, the two channels are externally connected and an expansion valve 25 is installed in series, the inner cavity of the valve body 10 is coated with a heat-insulating and noise-reducing material, the heat-insulating and noise-reducing material is preferably made of polyurethane, polytetrafluoroethylene plastic, etc., the four channels of the valve body 10 are respectively connected with an A pipe 11, a B pipe 12, a C pipe 13 and a D pipe 14, the A pipe 11, the B pipe 12, The C pipe 13 and the D pipe 14 are respectively arranged on the four sides of the U-shaped valve body 10, wherein the A pipe 11 and the C pipe 13 are connected to the outside and the expansion valve 25 is installed in series. Specifically, the A pipe 11 is provided with an A channel 16, the B pipe 12 is provided with a B channel 17, the C pipe 13 is provided with a C channel 18, and the D pipe 14 is provided with a D channel 19. The valve body 10 is provided with a valve plate assembly to control the opening and closing of each channel, so as to realize that when the pressure difference of the fluid connected to the valve body 10 changes, the fluid flow direction of the expansion valve 25 remains unchanged. Specifically, the valve plate assembly adopts an independent control method to realize that when one channel is opened, another channel is closed.

[0058] The valve plate assembly includes an A valve plate 1, a B valve plate 2, a C valve plate 61 and a D valve plate 62. The A valve plate 1 is used to control the on-off of the channel between the A pipe 11 and the B pipe 12, the B valve plate 2 is used to control the on-off of the channel between the D pipe 14 and the A pipe 11, the C valve plate 61 is used to control the on-off of the channel between the B pipe 12 and the C pipe 13, and the D valve plate 62 is used to control the on-off of the channel between the C pipe 13 and the D pipe 14. The valve body 10 is provided with an A valve seat 4, a B valve seat 5, a C valve seat 8 and a D valve seat 9. The A valve plate 1 is installed in a sealing manner with the A valve seat 4 and the A valve plate 1 is located on the side close to the B pipe 12, the B valve plate 2 is installed in a sealing manner with the B valve seat 5 and the B valve plate 2 is located on the side close to the D pipe 14, the C valve plate 61 is located between the C valve seat 8 and the D valve seat 9 and is installed in a sealing manner with the C valve seat 8, and the D valve plate 62 is located between the C valve seat 8 and the D valve seat 9 and is installed in a sealing manner with the D valve seat 9.

[0059] Among them, the A valve plate 1 is hingedly installed with the A valve seat 4, the B valve plate 2 is hingedly installed with the B valve seat 5, the C valve plate 61 is hingedly installed with the C valve seat 8, and the D valve plate 62 is hingedly installed with the D valve seat 9. A spring or magnetic component for resetting the A valve plate 1 is installed between the A valve plate 1 and the A valve seat 4, a spring or magnetic component for resetting the B valve plate 2 is installed between the B valve plate 2 and the B valve seat 5, a spring or magnetic component for resetting the C valve plate 61 is installed between the C valve plate 61 and the C valve seat 8, and a spring or magnetic component for resetting the D valve plate 62 is installed between the D valve plate 62 and the D valve seat 9. Figure 4 The middle spring or magnetic component is not shown.

[0060] Embodiment 5

[0061] See attached Figure 7On the basis of the fourth embodiment, the A pipe 11 and the C pipe 13 are connected to the E pipe 20 through an external pipe line, and the F valve plate 23 and the F valve seat 27 installed in a sealed manner are arranged on the channel between the E pipe 20 and the A pipe 11, and the G valve plate 24 and the G valve seat 28 installed in a sealed manner are arranged on the channel between the E pipe 20 and the C pipe 13, and the F valve plate 23 is located on the side close to the E pipe 20, and the G valve plate 24 is located on the side close to the C pipe 18. The valve can be used in the air conditioner in three modes: cooling, heating and hot water. When the valve is working, when the fluid pressure at the D channel 19 is relatively large, the fluid enters from the D channel 19 and then opens the D valve plate 62. It flows out through the C channel 18 and enters the A pipe 16 through the expansion valve 25. At this time, among the fluids at the E pipe 20 or the B pipe 12, the pipe whose fluid pressure is lower than the fluid pressure at the D pipe is in an open state, otherwise it is in a closed state; when the B pipe 12 or the E pipe 20 is the fluid inlet end, the one with the larger fluid pressure is opened and the other is closed. For example, the fluid pressure of the E pipe 20 is greater than that of the B pipe 12, then the fluid enters the valve body from the E pipe 20, flows out through the C pipe 18, passes through the expansion valve, enters the A pipe 11, opens the B valve plate 2, enters the D channel 19 and flows out. No matter how the direction is changed, the fluid direction of the expansion valve 25 remains unchanged.

[0062] The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

[0063] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An automatic reversing four-way valve, characterized in that: The invention comprises an integral U-shaped valve body (10) and at least four channels arranged on four sides of the valve body (10), namely, channel A (16), channel B (17), channel C (18) and channel D (19), wherein two channels are input inlet and outlet channels, the two channels are externally connected and an expansion valve (25) is installed in series, a valve plate assembly is arranged inside the valve body (10) to control the opening and closing of each channel, the valve plate assembly adopts a linkage interlocking or independent control method to realize that when one channel is opened, another channel is closed, so as to realize that when the direction of the input fluid connected to the valve body (10) changes, the fluid flow direction of the expansion valve (25) remains unchanged.

2. An automatic reversing four-way valve according to claim 1, characterized in that: The valve plate assembly comprises an A valve plate (1), a B valve plate (2) and a main C valve plate (6); an A guide shaft (3) is installed between the A valve plate (1) and the B valve plate (2) to ensure that the opening and closing directions of the A valve plate (1) and the B valve plate (2) are opposite; a B guide shaft (7) is provided on the main C valve plate (6); a valve body (10) is provided with four channels, namely, an A channel (16), a B channel (17), a C channel (18) and a D channel (19); the four channels are respectively connected to an A pipe (11), a B pipe (12), a C pipe (13) and a D pipe (14); an A valve seat (4), a B valve seat (5), a C valve seat (8) and a D valve seat (9) are provided inside the valve body (10); the A valve plate (1) is installed in a sealing manner with the A valve seat (4) and ... plate (1) and the A valve seat (4) and the A valve plate (1) is installed in a sealing manner with the A valve seat (4) and the A valve plate (1) is installed in a sealing manner with the A valve plate (1) and the A valve seat (4) and the A valve plate (1) is installed in a sealing manner with (1) is located on the side close to the B pipe (12), the B valve plate (2) is installed in a sealing manner with the B valve seat (5) and the B valve plate (2) is located on the side close to the D pipe (14), the A pipe (11) is located between the A valve plate (1) and the B valve plate (2), the C valve seat (8) is located close to the B pipe (12), the D valve seat (9) is located close to the D pipe (14), the main C valve plate (6) is located between the C valve seat (8) and the D valve seat (9) and is installed in a sealing manner with the C valve seat (8) and the D valve seat (9) at the top and bottom, respectively, the C pipe (13) is located between the C valve seat (8) and the D valve seat (9), the A guide shaft (3) is installed in a sliding manner with the A valve seat (4) and the B valve seat (5), The valve plate (1) is used to provide guidance or interlocking for the A valve plate (1) and the B valve plate (2). The B guide shaft (7) is slidably mounted with the C valve seat (8) and the D valve seat (9), and is used to provide guidance and interlocking for the main C valve plate (6). The A valve plate (1) is used to control the opening and closing of the channel between the A pipe (11) and the B pipe (12). The B valve plate (2) is used to control the opening and closing of the channel between the D pipe (14) and the A pipe (11). The opening and closing of the channel between the A pipe (11) and the B pipe (12) is logically opposite to the opening and closing of the channel between the D pipe (14) and the A pipe (11). The main C valve plate (6) is used to control the opening and closing of the channel between the B pipe (12) and the C pipe (13) and the opening and closing of the channel between the C pipe (13) and the D pipe (14). At the same time, the opening and closing direction of the channel between the B pipe (12) and the C pipe (13) is opposite to the opening and closing direction of the channel between the C pipe (13) and the D pipe (14).

3. The automatic reversing four-way valve according to claim 1, characterized in that: The valve plate assembly comprises an A valve plate (1), a B valve plate (2), a C valve plate (61) and a D valve plate (62); an A valve seat (4), a B valve seat (5), a C valve seat (8) and a D valve seat (9) are arranged inside the valve body (10); the valve body (10) is provided with four channels, namely, an A channel (16), a B channel (17), a C channel (18) and a D channel (19), which are respectively connected to an A pipe (11), a B pipe (12), a C pipe (13) and a D pipe (14); the A valve plate (1) is installed in a sealing manner with the A valve seat (4) and the A valve plate (1) is located on a side close to the B pipe (12); the B valve plate (2) is installed in a sealing manner with the B valve seat (5) and the B valve plate (2) is located on a side close to the D pipe (14); On one side of the connecting pipe (14), the C valve plate (61) is located between the C valve seat (8) and the D valve seat (9) and is installed in a sealing manner with the C valve seat (8); the D valve plate (62) is located between the C valve seat (8) and the D valve seat (9) and is installed in a sealing manner with the D valve seat (9); the A valve plate (1) is used to control the opening and closing of the channel between the A connecting pipe (11) and the B connecting pipe (12); the B valve plate (2) is used to control the opening and closing of the channel between the D connecting pipe (14) and the A connecting pipe (11); the C valve plate (61) is used to control the opening and closing of the channel between the B connecting pipe (12) and the C connecting pipe (13); and the D valve plate (62) is used to control the opening and closing of the channel between the C connecting pipe (13) and the D connecting pipe (14).

4. An automatic reversing four-way valve according to claim 3, characterized in that: The A valve plate (1) is mounted in cooperation with the A valve seat (4) via the D guide shaft (32), and the D guide shaft (32) is slidably mounted on the A valve seat (4); the B valve plate (2) is mounted in cooperation with the B valve seat (5) via the C guide shaft (31), and the C guide shaft (31) is slidably mounted on the B valve seat (5); the C valve plate (61) is mounted in cooperation with the C valve seat (8) via the E guide shaft (71), and the E guide shaft (71) is slidably mounted on the C valve seat (8); the D valve plate (62) is mounted in cooperation with the D valve seat (9) via the F guide shaft (72), and the F guide shaft (72) is slidably mounted on the D valve seat (9).

5. The automatic reversing four-way valve according to claim 3, characterized in that: The A valve plate (1) is hingedly mounted on the A valve seat (4), the B valve plate (2) is hingedly mounted on the B valve seat (5), the C valve plate (61) is hingedly mounted on the C valve seat (8), and the D valve plate (62) is hingedly mounted on the D valve seat (9).

6. An automatic reversing four-way valve according to claim 5, characterized in that: A first connecting rod (21) is installed between the A valve plate (1) and the B valve plate (2) to ensure that the A valve plate (1) and the B valve plate (2) have opposite opening and closing directions, and a second connecting rod (22) is installed between the C valve plate (61) and the D valve plate (62) to ensure that the C valve plate (61) and the D valve plate (62) have opposite opening and closing directions, and the two ends of the first connecting rod (21) are respectively hinged to the A valve plate (1) and the B valve plate (2), and the two ends of the second connecting rod (22) are respectively hinged to the C valve plate (61) and the D valve plate (62).

7. An automatic reversing four-way valve according to any one of claims 3 to 6, characterized in that: A spring or a magnetic component is installed between the A valve plate (1) and the A valve seat (4) for resetting the A valve plate (1) and keeping it normally open or normally closed. A spring or a magnetic component is installed between the B valve plate (2) and the B valve seat (5) for resetting the B valve plate (2) and keeping it normally open or normally closed. A spring or a magnetic component is installed between the C valve plate (61) and the C valve seat (8) for resetting the C valve plate (61) and keeping it normally open or normally closed. A spring or a magnetic component is installed between the D valve plate (62) and the D valve seat (9) for resetting the D valve plate (62) and keeping it normally open or normally closed.

8. The automatic reversing four-way valve according to claim 3, characterized in that: The A pipe (11) and the C pipe (13) are connected to the E pipe (20) through an external pipe. An F valve plate (23) and an F valve seat (27) are provided on the passage between the E pipe (20) and the A pipe (11). A G valve plate (24) and a G valve seat (28) are provided on the passage between the E pipe (20) and the C pipe (13). The F valve plate (23) is located on a side close to the E pipe (20), and the G valve plate (24) is located on a side close to the C pipe (13).

9. The automatic reversing four-way valve according to claim 3, characterized in that: The ends of the A pipe (11), the B pipe (12), the C pipe (13) and the D pipe (14) are all installed with a transfer pipe (15) which is convenient for welding. The shape of the valve body (10) is a special-shaped structure which is conducive to reducing fluid resistance and facilitating fluid flow or a special-shaped structure which is convenient for processing and production. The A pipe (11), the B pipe (12), the C pipe (13) and the D pipe (14) are respectively arranged on the four sides of the mouth shape, and the axis of the A pipe (11) coincides with the axis of the A valve plate (1), the axis of the B pipe (12) coincides with the axis of the C valve plate (61), the axis of the D valve plate (62) coincides with the axis of the C pipe (13), and the axis of the B valve plate (2) coincides with the axis of the D pipe (14).

10. The automatic reversing four-way valve according to claim 3, characterized in that: A sensor for monitoring the position of each valve plate in the valve plate assembly is installed on the valve body (10), and a heat-insulating and noise-reducing material is provided in the inner cavity of the valve body (10).

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