Four-way valve, heating and ventilation equipment outdoor unit and heating and ventilation equipment

Abstract

The utility model discloses a four-way valve, a heating and ventilation equipment outdoor unit and heating and ventilation equipment, and relates to the technical field of heating and ventilation equipment. The four-way valve comprises a valve body, a first pipe connector and a second pipe connector, the first pipe connector comprises a main pipe section and a one-way valve pipe section which are communicated, the main pipe section is located between the valve body and the one-way valve pipe section and connected and communicated with the valve body, and an air inlet is formed in the end, away from the main pipe section, of the one-way valve pipe section and used for being connected with an exhaust port of the compressor. A valve element is arranged in the one-way valve pipe section and used for opening and closing communication between the air inlet and the main pipe section. One end of the second pipe joint is connected and communicated with the valve body, and the other end is connected with an air return port of the compressor. The one-way valve is directly integrated on the first pipe joint, and a middle structure for connecting the one-way valve and the four-way valve body is omitted, so that the structure of a machine body can be simplified to a certain extent, the overall size of the machine body is reduced, and certain production and manufacturing cost can be reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of heating, ventilation and air conditioning (HVAC) equipment, and particularly to a four-way valve, an outdoor unit of HVAC equipment and HVAC equipment. Background Art

[0002] What is provided in this part is only background information related to the present disclosure, and it is not necessarily prior art.

[0003] The four-way valve plays a key control and regulation role in HVAC equipment, ensuring that the system can operate efficiently and stably, while meeting the requirements of different usage environments and needs.

[0004] The four-way valve needs to be connected to functional components such as check valves, pressure switches, and filters to ensure the stable operation of HVAC equipment. However, functional components such as check valves are independently distributed within the body of the outdoor unit of HVAC equipment and are connected to the four-way valve through intermediate pipelines, making the body structure complex, the volume bloated, and the production cost high. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the problems of complex body structure, bloated volume, and high production cost of the existing outdoor unit of HVAC equipment. This purpose is achieved through the following technical solutions:

[0006] In a first aspect, the utility model provides a four-way valve applied to HVAC equipment with a compressor, including a valve body, a first pipe joint, and a second pipe joint. The first pipe joint includes a main pipe section and a check valve pipe section that are connected and communicate with each other. The main pipe section is connected to and communicates with the valve body, and the main pipe section is located between the valve body and the check valve pipe section. One end of the check valve pipe section away from the main pipe section is used to communicate with an exhaust pipe, and the exhaust pipe is used to communicate with the exhaust port of the compressor. A valve core is provided inside the check valve pipe section, and the valve core is used to unidirectionally conduct the check valve pipe section in the direction from the check valve pipe section to the main pipe section; one end of the second pipe joint is connected to and communicates with the valve body, and the other end is used to communicate with an intake pipeline, and the intake pipeline is used to communicate with the return air port of the compressor.

[0007] According to the four-way valve provided by the utility model, different from connecting the check valve and the first pipe joint through an intermediate structure in the related art, the check valve is directly integrated into the first pipe joint, omitting the intermediate structure connecting the check valve and the four-way valve body. Therefore, the body structure can be simplified to a certain extent, the overall volume of the body can be reduced, and the production and manufacturing cost can also be reduced to a certain extent.

[0008] In addition, according to the four-way valve provided by the utility model, the following additional technical features may also be provided:

[0009] In some embodiments of the present utility model, the four-way valve further includes a first pressure detection device, which is directly installed on the main pipe section, connected and communicated with the main pipe section, and the first pressure detection device is used to detect the pressure information in the main pipe section.

[0010] In some embodiments of the present utility model, the four-way valve further includes a second pressure detection device, which is directly installed on the second pipe joint, connected and communicated with the second pipe joint, and the second pressure detection device is used to detect the pressure information in the second pipe joint.

[0011] In some embodiments of the present utility model, the first pressure detection device is integrally connected to the second pipe joint, and / or the second pressure detection device is integrally connected to the second pipe joint.

[0012] In some embodiments of the present utility model, a part of the first pressure detection device is installed on the first pipe joint, and another part of the first pressure detection device is installed on the second pipe joint. The first pressure detection device is configured to be able to detect the pressure information of both the first pipe joint and the second pipe joint simultaneously.

[0013] In some embodiments of the present utility model, the first pressure detection device includes a pressure sensing element, a first conducting member, and a second conducting member; one end of the first conducting member is connected and communicated with the pressure sensing element, the other end of the first conducting member is connected and communicated with the first pipe joint, one end of the second conducting member is connected and communicated with the pressure sensing element, the other end of the second conducting member is connected and communicated with the second pipe joint, and the pressure sensing element is configured to detect the pressure information in the first pipe joint through the first conducting member and detect the pressure information in the second pipe joint through the second conducting member.

[0014] In some embodiments of the present utility model, the first conducting member is integrally connected to the first pipe joint, and / or the second conducting member is integrally connected to the second pipe joint.

[0015] In some embodiments of the present utility model, the four-way valve assembly further includes a filter. The four-way valve body further includes a third pipe joint, which is used to communicate with the first refrigerant flow path. The first refrigerant flow path is used to communicate with the heat exchanger of the heating and ventilation equipment. The third pipe joint is connected and communicated with the valve body, and the filter is connected to the third pipe joint.

[0016] In some embodiments of the present utility model, the filter includes a filter cartridge and a first filter element located inside the filter cartridge. One end of the filter cartridge is installed at one end of the third pipe joint away from the valve body and is used to filter the refrigerant flowing through the third pipe joint.

[0017] In some embodiments of the present utility model, the filter includes a second filter element, and the second filter element is directly installed inside the third pipe joint.

[0018] In a second aspect, the present utility model provides an outdoor unit of a heating, ventilation, and air conditioning (HVAC) device, which includes a housing, a heat exchanger, a compressor, and a four-way valve as described in any one of the above technical solutions; the four-way valve is respectively connected to and communicates with the compressor and the heat exchanger.

[0019] In a third aspect, the present utility model provides an HVAC device, which includes an indoor unit of an HVAC device and an outdoor unit of an HVAC device as described in any one of the above technical solutions, and the indoor unit and the outdoor unit of the HVAC device are connected by pipelines. Description of the Drawings

[0020] By reading the detailed description of the preferred embodiments below, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0021] Figure 1 Schematically shows a structural diagram of a four-way valve provided in Embodiment 1 of the present utility model;

[0022] Figure 2 Schematically shows a structural diagram of another four-way valve provided in Embodiment 1 of the present utility model;

[0023] Figure 3 Schematically shows a structural diagram of a four-way valve provided in Embodiment 2 of the present utility model;

[0024] Figure 4 Schematically shows a structural diagram of a four-way valve provided in Embodiment 3 of the present utility model;

[0025] Figure 5 Schematically shows a structural diagram of a filter component provided in Embodiment 3 of the present utility model;

[0026] Figure 6 is Figure 5 an enlarged view of part a;

[0027] Figure 7Schematically shown is a schematic structural diagram of another filter component provided according to Embodiment 3 of the present utility model;

[0028] Figure 8 For Figure 7 an enlarged view of part b;

[0029] Figure 9 Schematically shown is a schematic structural diagram of yet another filter component provided according to Embodiment 3 of the present utility model;

[0030] Figure 10 Schematically shown is a schematic diagram of the refrigerant flow path of a heating, ventilation, and air - conditioning (HVAC) device provided according to Embodiment 5 of the present invention.

[0031] The reference numerals are as follows:

[0032] 100, four - way valve;

[0033] 10, valve body;

[0034] 20, first pipe joint; 21, main pipe section; 22, check - valve pipe section; 221, air inlet;

[0035] 30, second pipe joint;

[0036] 40, third pipe joint;

[0037] 50, fourth pipe joint;

[0038] 60, pilot valve; 61, mounting member; 611, connection hole; 612, upturned portion;

[0039] 70, first pressure detection device; 71, first conducting member; 72, second conducting member; 721, bent portion;

[0040] 80, second pressure detection device;

[0041] 90, filter; 91, filter cartridge; 92, first filter element; 93, second filter element;

[0042] 200, exhaust pipe; 300, intake pipe; 400, first refrigerant flow path; 410, expansion valve; 420, liquid - side stop valve; 500, second refrigerant flow path; 510, gas - side stop valve; 600, first heat exchanger; 700, second heat exchanger; 800, gas - liquid separator; 900, compressor; 2000, outdoor unit of HVAC device; 3000, indoor unit of HVAC device. Detailed implementation manners

[0043] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0044] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and therefore specify the presence of the stated features, steps, operations, elements, and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the order of performance is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0045] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms used herein do not imply an order or sequence. Thus, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0046] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure relative to another element or feature. These relative relationship terms are, for example, "inner", "outer", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device during use or operation in addition to the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "over" other elements or features. Thus, the exemplary term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0047] Embodiment 1

[0048] Combined with the attached Figure 1 and the attached Figure 2 As shown, this embodiment provides a four-way valve 100, which includes a valve body 10, a first pipe joint 20, a second pipe joint 30, a third pipe joint 40, and a fourth pipe joint 50. The valve body 10 is a cylindrical structure with both ends closed and a chamber inside. A switching mechanism (not shown in the figure) is provided in the chamber. A pilot valve 60 is installed outside the valve body 10. The pilot valve 60 is connected to the chamber of the valve body 10 through capillary tubes at both ends, and the pilot valve 60 can drive the switching mechanism to act for commutation.

[0049] The first pipe joint 20, the second pipe joint 30, the third pipe joint 40, and the fourth pipe joint 50 are all joint pipe segments extending outward from the side wall of the valve body 10. The first pipe joint 20 is used to connect the exhaust pipe 200 of the heating and ventilation equipment. The exhaust pipe 200 can be understood as the D pipe used to connect the exhaust port of the compressor 900. An air inlet is provided at one end of the first pipe joint 20 facing away from the valve body 10. The air inlet is used to communicate with the exhaust pipe 200. The refrigerant flowing out of the exhaust port of the compressor 900 enters the chamber of the four-way valve 100 through the exhaust pipe 200 and the first pipe joint 20 in sequence.

[0050] The second pipe joint 30 is used to connect the intake pipe 300 of the heating and ventilation equipment. The intake pipe 300 can be understood as the S pipe used to connect the suction port of the compressor 900. The second pipe joint 30 and the first pipe joint 20 can be respectively located on both sides of the valve body 10 in the radial direction. The refrigerant in the four-way valve 100 can flow back into the compressor 900 through the second pipe joint 30 and the intake pipe 300 in sequence.

[0051] The third pipe joint 40 is used to connect the first refrigerant flow path 400, which can be understood as the E pipe for connecting the first heat exchanger. The fourth pipe joint 50 is used to connect the second refrigerant flow path 500, which can be understood as the C pipe for connecting the second heat exchanger, so that the refrigerant can flow between the first heat exchanger and the second heat exchanger of the HVAC equipment.

[0052] It should be noted that since the basic working principle of the four-way valve 100 is well-known to those skilled in the art, this embodiment will not describe it in detail. Those skilled in the art can refer to the related technology for understanding.

[0053] Different from the related technology in which the check valve and the first pipe joint 20 are connected through an intermediate pipeline, in this embodiment, the check valve is directly integrated into the first pipe joint 20. Accordingly, the length of the first pipe joint 20 needs to be extended. Therefore, in this embodiment, the first pipe joint 20 is designed to include a main pipe section 21 and a check valve pipe section 22 that are connected and communicate with each other. The main pipe section 21 and the check valve pipe section 22 can be integrally formed directly during processing. The main pipe section 21 is located between the valve body 10 and the check valve pipe section 22 and is connected and communicates with the valve body 10.

[0054] The function of the check valve in this embodiment is to allow the refrigerant to enter the four-way valve 100 only from the compressor and prevent the refrigerant from flowing back from the four-way valve 100 to the compressor. An air inlet 221 as described above is provided at one end of the check valve pipe section 22 facing away from the main pipe section 21. The air inlet 221 is used to connect to the exhaust port of the compressor. A valve core (not shown in the figure) is provided inside the check valve pipe section 22, and the valve core is used to open and close the communication between the air inlet 221 and the main pipe section 21.

[0055] Furthermore, a valve seat and a retaining ring (not shown in the figure) may be provided inside the check valve pipe section 22. The valve core can move axially along the check valve pipe section 22 under the flow of the refrigerant. When the valve core moves to cooperate with the valve seat, the communication between the air inlet 221 and the main pipe section 21 is cut off. When the valve core moves to cooperate with the retaining ring, the valve core has a flow channel, and the flow channel conducts the air inlet 221 and the main pipe section 21.

[0056] Combined with the above structural description, in this embodiment, the check valve is directly integrated into the first pipe joint 20, omitting the intermediate connecting pipeline, thereby being able to simplify the body structure, reduce the overall volume of the body, and also reduce the production and manufacturing cost to a certain extent.

[0057] In addition, different from the related technology in which the pressure sensor and the four-way valve 100 are connected through an intermediate structure (such as a bracket, pipeline, etc.), the first pressure detection device 70 in this embodiment is directly integrated on the four-way valve 100 body and communicates with the first pipe joint 20 on the four-way valve 100 body.

[0058] The first pressure detection device 70 is used to detect the pressure information in the first pipe joint 20. This pressure information can be the high-pressure information in the first pipe joint 20. Through the high-pressure information, the flow rate of the fluid can be calculated. Moreover, the high-pressure information can be fed back to the control system to automatically or manually adjust the opening degree of the four-way valve 100 to achieve the required flow rate adjustment of the system. In addition, through the first pressure detection device 70, the change of the fluid pressure in the system can be monitored in real time, which helps to diagnose problems such as pipeline blockage, valve failure or system leakage in a timely manner. The above-mentioned high-pressure information refers to a pressure range that can be between dozens to hundreds of pascals (Pa) to several hundred kilopascals (kPa). The specific range depends on the design pressure of the air-conditioning system and the type of refrigerant used. For example, for common refrigerants, the high-pressure range may be between 3000 kPa (3 MPa) and 4500 kPa (4.5 MPa).

[0059] In this embodiment, the first pressure detection device 70 is directly installed on the first pipe joint 20, omitting the intermediate structure for the first pressure detection device 70 to be respectively connected to the body of the four-way valve 100, thereby further simplifying the body structure, reducing the overall volume of the body, and also being able to reduce a certain production and manufacturing cost.

[0060] In order to be able to detect the pressure information in the second pipe joint 30, in some examples, optionally, the four-way valve 100 of this embodiment further includes a second pressure detection device 80. The second pressure detection device 80 has the same or similar structure as the aforementioned first pressure detection device 70. For example, both can be pressure sensors. The detection ranges of the second pressure detection device 80 and the first pressure detection device 70 can be different. For example, the first pressure detection device 70 can detect high-pressure information, and the second pressure detection device 80 is used to detect the low-pressure information of the second pipe joint 30. The low-pressure information can be between dozens of kilopascals and several hundred kilopascals, for example, between 300 kPa (0.3 MPa) and 700 kPa (0.7 MPa).

[0061] Similar to the installation method of the first pressure detection device 70, the second pressure detection device 80 of this embodiment is also directly installed on the second pipe joint 30 and is connected and communicated with the second pipe joint 30, thereby further saving the space inside the body and simplifying the structure.

[0062] The first pressure detection device 70 and the second pressure detection device 80 of this embodiment can both include a housing and an internal pressure sensing element. The materials of the housing and the first pipe joint 20 and the second pipe joint 30 can be the same or similar. The housing can also include a pipe section for connecting and communicating with the first pipe joint 20 or the second pipe joint 30. This pipe section is different from the existing intermediate pipeline for connecting the sensor and the four-way valve 100. In this embodiment, the length of the pipe section of the housing is small and belongs to the housing or a part of the sensor.

[0063] In some examples, optionally, the first pressure detection device 70 can be integrally connected to the first pipe joint 20, and the second pressure detection device 80 can also be integrally connected to the second pipe joint 30. The integrated connection method described in this embodiment includes welding, bonding, hot melt connection, etc., and can also include an integrated molding method during processing.

[0064] In order to facilitate the assembly of the pilot valve 60, the present embodiment also improves the structure of the four-way valve 100. In some examples, optionally, the four-way valve 100 also includes a mounting member 61, and the mounting member 61 is provided with a connecting hole 611 for the first pipe joint 20 to pass through. The mounting member 61 is sleeved on the first pipe joint 20 through the connecting hole 611, and the pilot valve 60 is connected to the mounting member 61.

[0065] The mounting member 61 of this embodiment may be a plate-like or sheet-like structure. To enable a more stable connection to the valve body 10 , the surface of the mounting member 61 of this embodiment facing the valve body 10 may be designed as an arc surface, which fits the outer wall of the valve body 10 .

[0066] Furthermore, the mounting member 61 may be connected to the outer wall of the valve body 10 by means of bolts, screws and other components, thereby further improving the installation stability of the mounting member 61 and the pilot valve 60 .

[0067] One end of the mounting member 61 close to the pilot valve 60 is provided with a raised portion 612 bent relative to the mounting member 61 . The pilot valve 60 can be mounted on the raised portion 612 by means of bolts or other components and fit against the outer wall of the valve body 10 .

[0068] Embodiment 2

[0069] The body of the four-way valve 100 of this embodiment is the same as that of the first embodiment, except that this embodiment uses a first pressure detection device 70 to simultaneously collect pressure information in the first pipe joint 20 and the second pipe joint 30 .

[0070] Combined with Figure 3 As shown, a portion of the first pressure detection device 70 of this embodiment is installed on the first pipe joint 20, and the other portion is installed on the second pipe joint 30. The first pressure detection device 70 is configured to be able to simultaneously detect pressure information of the first pipe joint 20 and the second pipe joint 30.

[0071] This first pressure detection device 70 includes a pressure sensing element mechanism, a first conducting member 71, and a second conducting member 72. The pressure sensing element mechanism may include one or two pressure sensing elements. When there is one pressure sensing element, the circuit of one pressure sensing element can separately process and distinguish the pressure signals from the first pipe joint 20 and the second pipe joint 30. The pressure sensing element is located inside the housing, so it is not shown in the figure. Of course, it can also be that two pressure sensing elements are integrated in one sensor housing, one of which is directly connected to the first conducting member 71, and the other is directly connected to the second conducting member 72. The two pressure sensing elements separately process the pressure signals from the first pipe joint 20 and the second pipe joint 30 (this implementation is not shown in the figure).

[0072] In this embodiment, the pressure sensing element can be located inside the sensor housing. One end of the first conducting member 71 is connected and communicated with the housing of the pressure sensing element, and the other end of the first conducting member 71 is connected and communicated with the first pipe joint 20.

[0073] Similarly, one end of the second conducting member 72 in this embodiment is connected and communicated with the pressure sensing element, and the other end of the second conducting member 72 is connected and communicated with the second pipe joint 30. The pressure sensing element is configured to detect the pressure information in the first pipe joint 20 through the first conducting member 71 and detect the pressure information in the second pipe joint 30 through the second conducting member 72.

[0074] The first conducting member 71 and the second conducting member 72 can be rigid or flexible pipe structures. As part of the first pressure detection device 70, they are used to assist the pressure sensing element in collecting the pressure information of the first pipe joint 20 and the second pipe joint 30.

[0075] This structure integrates the first pressure detection device 70 and the second pressure detection device 80 in Embodiment 1 so that only the first pressure detection device 70 is used to detect the pressures of the first pipe joint 20 and the second pipe joint 30, which can further simplify the structure, improve the integration degree of the four-way valve 100, and reduce the volume of the machine body.

[0076] In some examples, optionally, the first conducting member 71 can be integrally connected to the first pipe joint 20, and the second conducting member 72 can also be integrally connected to the second pipe joint 30. The integrally connected methods include welding, bonding, hot melt connection, etc., and can also include the method of integral molding during processing.

[0077] In order to further optimize the space and avoid interfering with the structure of the pilot valve 60 and other structures, in some examples, optionally, the second conducting member 72 of this embodiment is provided with a bending portion 721. The bending portion 721 faces the valve body 10, the first pipe joint 20, and the second pipe joint 30, and forms intervals with a part of the valve body 10, a part of the first pipe joint 20, and a part of the second pipe joint 30 respectively, so that an installation space is enclosed by the bending portion 721, the valve body 10, a part of the valve body 10, a part of the first pipe joint 20, and a part of the second pipe joint 30.

[0078] A part of the pilot valve 60 of this embodiment is located in this installation space, so that the possibility of interference between the second conducting member 72 and the pilot valve 60 is reduced. Moreover, when the second conducting member 72 is a rigid structure, the second conducting member 72 can also be used to support and protect the outside of the pilot valve 60.

[0079] Embodiment Three

[0080] Combined with the attached Figure 4 As shown, the difference from the above-mentioned Embodiment One and Embodiment Two is that the four-way valve 100 of this embodiment further includes a filter 90. The filter 90 is directly connected to the third pipe joint 40 of the four-way valve 100 body and is used to filter the refrigerant in the third pipe joint 40.

[0081] That is, the filter 90 is directly integrated on the third pipe joint 40 of this embodiment, and there are two structural forms of the filter 90.

[0082] The first one is as Figure 4-8 shown. The filter 90 includes a filter cartridge 91 and one or more first filter elements 92 located in the filter cartridge 91. The radial dimension of the filter cartridge 91 can be larger than the radial dimension of the third pipe joint 40. One end of the filter cartridge 91 is directly installed at the air outlet of the third pipe joint 40. The connection manner between the filter cartridge 91 and the third pipe joint 40 in this embodiment can be an integral connection manner such as welding. The first filter element 92 can be a structure such as a filter screen to filter the refrigerant flowing out of the third pipe joint 40.

[0083] The filter cartridge 91 can be Figure 5 and 6 shown with a radial dimension larger than that of the third pipe joint 40, or it can be as Figure 7 and 8 shown, where the radial dimension of the filter cartridge 91 is equal to or smaller than the radial dimension of the third pipe joint 40. The filter cartridge 91 and the third pipe joint 40 can be connected by welding, and the welding points can be the structure between the two as shown in Figure 6 and 8 shown.

[0084] As Figure 9As shown in the figure, the second way is to directly install the filter 90 inside the third pipe joint 40 to filter the refrigerant inside the third pipe joint 40. The filter 90 of this structure may include one or more second filter elements 93, and the second filter element 93 is directly installed inside the third pipe joint 40. The second filter element 93 may also be a structure such as a filter net. The filter 90 of this structure occupies less space in the machine body compared to the first way and has a higher degree of integration.

[0085] Embodiment 4

[0086] Combined with the attached Figure 10 As shown in the figure, this embodiment provides an outdoor unit 2000 of a heating, ventilation and air conditioning (HVAC) device, including a housing (not shown in the figure), a first heat exchanger 600, a gas-liquid separator 800, a compressor 900 (not shown in the figure), and a four-way valve 100 as described in any one of the above Embodiments 1 to 3; the four-way valve 100 is respectively connected and communicated with the compressor 900 and the heat exchanger.

[0087] Specifically, the first pipe joint 20 of the four-way valve 100 may be connected to the exhaust port of the compressor 900 through an exhaust pipe 200, the second pipe joint 30 may be connected to the suction port of the compressor 900 through a suction pipe 300, the third pipe joint 40 may be connected to the first heat exchanger 600 through a first refrigerant flow path 400, and the fourth pipe joint 50 may be connected to the second heat exchanger 700 of the indoor unit 3000 of the HVAC device through a second refrigerant flow path 500.

[0088] The refrigerant in the compressor 900 sequentially enters the valve body 10 through the suction pipe 300 and the second pipe joint 30, then flows into the first refrigerant flow path 400 through the third pipe joint 40, and after being processed by structures such as an expansion valve 410 and a liquid-side stop valve 420 on the first refrigerant flow path 400, it flows into the first heat exchanger 600 and the second heat exchanger 700. The refrigerant in the second heat exchanger 700 enters the fourth pipe joint 50 after being processed by a gas-side stop valve 510 on the second refrigerant flow path 500, then returns to the valve body 10, and then enters the gas-liquid separator 800 through the first pipe joint 20 and the exhaust pipe 200 for oil separation, and then returns to the compressor again to complete the refrigerant cycle.

[0089] Regarding the structure of other parts of the outdoor unit 2000 of the HVAC device except the four-way valve 100, please refer to the related technology, and this application will not elaborate here.

[0090] Embodiment 5

[0091] Combined with the attached Figure 10 As shown in the figure, this embodiment provides an HVAC device, including the outdoor unit 2000 of the HVAC device shown in Embodiment 4. In some embodiments, the HVAC device further includes an indoor unit 3000 of the HVAC device, and the indoor unit 3000 of the HVAC device and the outdoor unit 2000 of the HVAC device are connected and communicated through pipelines.

[0092] Since the refrigerant cycle has been introduced in Embodiment 4, it will not be elaborated in this embodiment. In addition, for other structures of the indoor unit 3000 of the HVAC equipment, reference can be made to the related art, and this embodiment will not describe them in detail either.

[0093] The above are only the preferred specific embodiments of the present utility model, and the embodiments can be combined and replaced with each other. However, the protection scope of the present utility model is not limited thereto. Any changes or replacements that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A four-way valve, applied to HVAC equipment with a compressor, characterized in that: include: Valve body; a first pipe joint, the first pipe joint comprising a connected main pipe section and a one-way valve pipe section, the main pipe section being connected and connected to the valve body, the main pipe section being located between the valve body and the one-way valve pipe section, the one-way valve pipe section having an end away from the main pipe section being used for connecting to an exhaust pipe, the exhaust pipe being used for connecting to an exhaust port of the compressor, a valve core being provided inside the one-way valve pipe section, the valve core being used for unidirectionally conducting the one-way valve pipe section in a direction from the one-way valve pipe section to the main pipe section; and A second pipe joint, one end of which is connected to and communicated with the valve body, and the other end of which is used to communicate with an air intake pipeline, and the air intake pipeline is used to communicate with the return air port of the compressor.

2. The four-way valve according to claim 1, characterized in that: The four-way valve further includes a first pressure detection device, which is installed on the main pipe section and communicated with the main pipe section, and is used to detect pressure information in the main pipe section.

3. The four-way valve according to claim 2, characterized in that: The four-way valve further includes a second pressure detection device, which is installed on the second pipe joint and communicated with the second pipe joint, and is used to detect pressure information in the second pipe joint.

4. The four-way valve according to claim 3, characterized in that: The first pressure detection device is integrally connected to the main pipe section, and / or the second pressure detection device is integrally connected to the second pipe joint.

5. The four-way valve according to claim 2, characterized in that: The first pressure detection device is also connected to and communicated with the second pipe joint, and the first pressure detection device is also used to detect pressure information in the second pipe joint.

6. The four-way valve according to claim 5, characterized in that: The first pressure detection device includes a pressure sensing element, a first conductive piece and a second conductive piece; one end of the first conductive piece is connected and communicated with the pressure sensing element, the other end of the first conductive piece is connected and communicated with the main pipe section, one end of the second conductive piece is connected and communicated with the pressure sensing element, and the other end of the second conductive piece is connected and communicated with the second pipe joint, and the pressure sensing element is configured to detect pressure information in the first pipe joint through the first conductive piece, and detect pressure information in the second pipe joint through the second conductive piece.

7. The four-way valve according to claim 6, characterized in that: The first conductive piece is integrally connected to the main pipe section, and / or the second conductive piece is integrally connected to the second pipe joint.

8. The four-way valve according to any one of claims 1 to 7, characterized in that: The four-way valve assembly also includes a filter, and the four-way valve body also includes a third pipe joint, the third pipe joint is used to connect the first refrigerant flow path, the first refrigerant flow path is used to connect the heat exchanger of the HVAC equipment, the third pipe joint is connected and connected to the valve body, and the filter is connected to the third pipe joint.

9. The four-way valve according to claim 8, characterized in that: The filter comprises a filter cartridge and a first filter element located in the filter cartridge. One end of the filter cartridge is mounted on an end of the third pipe joint away from the valve body and is used to filter the refrigerant flowing through the third pipe joint.

10. The four-way valve according to claim 8, characterized in that: The filter comprises a second filter element, and the second filter element is installed in the third pipe joint.

11. An outdoor unit of a heating and ventilation equipment, characterized in that: It comprises a shell, a heat exchanger, a compressor and a four-way valve as described in any one of claims 1 to 10, wherein the heat exchanger, the compressor and the four-way valve are all arranged in the shell, and the four-way valve is connected and communicated with the compressor and the heat exchanger respectively.

12. A HVAC equipment, characterized in that: It comprises a HVAC equipment indoor unit and a HVAC equipment outdoor unit as claimed in claim 11, wherein the HVAC equipment indoor unit and the HVAC equipment outdoor unit are connected via a pipeline.

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