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

Abstract

The invention discloses a four-way valve assembly, 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 assembly comprises a valve body, a plurality of electric appliance parts and a switching part, the plurality of electric appliance parts are in telecommunication connection with the switching part through a first line, and then the switching part is in telecommunication connection with the control device through a second line, so that telecommunication connection between the plurality of electric appliance parts and the control device is achieved. Compared with an original mode that a plurality of electric appliance parts are in one-to-one telecommunication connection with the control device through a plurality of circuits, the complexity of the circuits can be reduced, so that the internal space of a machine body of the outdoor unit of the heating and ventilation equipment is saved, and the size and the production cost of the machine body are reduced.

Description

Technical Field

[0001] The invention relates to the technical field of HVAC equipment, and in particular to a four-way valve component, a HVAC equipment outdoor unit and HVAC equipment. Background Art

[0002] This section merely provides background information related to the present disclosure and 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 and the pipes connected to it need to detect parameters such as temperature and pressure through electrical devices such as temperature detection devices and pressure detection devices. The above electrical devices need to be connected to the control device of the HVAC equipment through their own connecting lines. Not only are there many connecting lines and the wiring is complicated, the body structure of the HVAC equipment outdoor unit is complicated, the size is bloated, and the production cost is high. Summary of the invention

[0005] The purpose of the present invention is to at least solve the problems of the existing HVAC equipment outdoor unit having a complex structure, bulky volume and high production cost. This purpose is achieved through the following technical solutions:

[0006] In the first aspect, the present invention proposes a four-way valve assembly, which is applied to HVAC equipment with a compressor and a control device, including a valve body, multiple electrical components and a switching component. The valve body includes a main valve pipe and a first pipe joint and a second pipe joint arranged on the main valve pipe. The first pipe joint is used to connect to an exhaust pipe, and the exhaust pipe is used to connect to the exhaust port of the compressor. The second pipe joint is used to connect to an intake pipe, and the intake pipe is used to connect to a return air port of the compressor; the multiple electrical components include at least one of a temperature detection component, a pressure switch component and a pressure detection component, and each of the electrical components is connected to the first pipe joint and / or the second pipe joint; the switching component is installed on the main valve pipe, and the switching component is electrically connected to each of the electrical components through a first line, and is used to electrically connect to the control device through a second line.

[0007] According to the four-way valve assembly provided by the present invention, multiple electrical components are electrically connected to the adapter component through a first line, and then the adapter component is electrically connected to the control device through a second line, thereby realizing the connection between the multiple electrical components and the control device. Compared with the original method of connecting the multiple electrical components to the control device one by one through multiple lines, the complexity of the lines can be reduced, thereby saving the internal space of the outdoor unit of the HVAC equipment, reducing the body volume and production costs.

[0008] In addition, the four-way valve assembly provided by the present invention may also have the following additional technical features:

[0009] In some embodiments of the present invention, the adapter component includes a circuit board, which is electrically connected to each of the electrical components via the first line and is used to electrically connect to the control device via a second line.

[0010] In some embodiments of the present invention, the adapter component also includes a mounting base installed on the main valve tube, the mounting base includes a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall form a receiving groove, and the circuit board is installed in the receiving groove.

[0011] In some embodiments of the present invention, the side wall is provided with a first wire passing hole for the first wire to pass through, and / or the side wall is provided with a second wire passing hole for the second wire to pass through.

[0012] In some embodiments of the present invention, the adapter component further includes a cover body, which is mounted on the mounting seat and forms a cavity with the accommodating groove for mounting the circuit board.

[0013] In some embodiments of the present invention, the electrical component includes a first temperature detection component, which is installed on the first pipe joint and is used to detect the temperature of the first pipe joint; and / or, the electrical component includes a second temperature detection component, which is installed on the second pipe joint and is used to detect the temperature of the second pipe joint.

[0014] In some embodiments of the present invention, the first temperature detection component includes a first heat conductive member and a first temperature detection member, the first heat conductive member is installed on the first pipe joint and is thermally connected to the first pipe joint, the first heat conductive member is provided with a first accommodating cavity, the first temperature detection member is installed in the first accommodating cavity and fits with the inner wall of the first heat conductive member.

[0015] In some embodiments of the present invention, a first opening is provided at one end of the first heat conducting member, the first opening is communicated with the first accommodating cavity, and the first temperature detecting member is inserted into the first accommodating cavity through the first opening.

[0016] In some embodiments of the present invention, the electrical component includes a first pressure switch component, a first interface is provided on the side wall of the first pipe joint, the first pressure switch component is installed on the first interface and is connected to the first pipe joint through the first interface; and / or, the electrical component includes a second pressure switch component, a second interface is provided on the side wall of the second pipe joint, the second pressure switch component is installed on the second interface and is connected to the second pipe joint through the second interface.

[0017] In some embodiments of the present invention, the multiple electrical components include a first pressure detection component, the side wall of the first pipe joint is provided with a third interface, the first pressure detection component is installed on the third interface and is connected to the first pipe joint through the third interface; and / or, the multiple electrical components include a second pressure detection component, the side wall of the second pipe joint is provided with a fourth interface, the second pressure detection component is installed on the fourth interface and is connected to the second pipe joint through the fourth interface.

[0018] In some embodiments of the present invention, the multiple electrical components include a third pressure detection component, which is respectively connected to the first pipe joint and the second pipe joint and is used to detect pressure information inside the first pipe joint and the second pipe joint.

[0019] In some embodiments of the present invention, the third pressure detection component includes a pressure sensing element, a first conductive piece and a second conductive piece. The side wall of the first pipe joint is provided with a fifth interface, and the side wall of the second pipe joint is provided with a sixth interface. One end of the first conductive piece is connected and communicated with the pressure sensing element, and the other end of the first conductive piece is installed on the fifth interface and communicated with the first pipe joint through the fifth interface. 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 installed on the sixth interface and communicated with the second pipe joint through the sixth interface. 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.

[0020] In some embodiments of the present invention, the second conducting member is provided with a bending portion, which is bent on one side facing the main valve tube, the first pipe joint and the second pipe joint, and the bending portion, the main valve tube, the first pipe joint and the second pipe joint form an installation space. The four-way valve assembly also includes a pilot valve, which is installed on one side of the four-way valve assembly body and is partially located in the installation space.

[0021] In some embodiments of the present invention, the four-way valve assembly also includes a mounting member, which is provided with a connecting interface for the first pipe joint to pass through, the mounting member is sleeved on the first pipe joint through the connecting interface and is connected to the main valve pipe, the pilot valve is connected to one side of the mounting member, and the adapter component is installed on the other side of the mounting member.

[0022] In some embodiments of the present invention, the surface of the mounting member facing the main valve tube is an arc surface, and the arc surface fits with the outer wall surface of the main valve tube.

[0023] In some embodiments of the present invention, the first pipe joint includes a connected main pipe section and a one-way valve pipe section, the main pipe section is located between the main valve pipe and the one-way valve pipe section, the main pipe section is connected and communicated with the main valve pipe, the one-way valve pipe section is used to connect to the exhaust port of the compressor, a valve core is provided inside the one-way valve pipe section, and the valve core is used to control the one-way valve pipe section to be unidirectional from the one-way valve pipe section to the main pipe section.

[0024] In some embodiments of the present invention, the valve body also includes a third pipe joint arranged on the main valve pipe, and the third pipe joint is used to connect the first refrigerant flow path, and the first refrigerant flow path is used to connect the heat exchanger of the HVAC equipment. The four-way valve assembly also includes a filter component, and the filter component is installed on the third pipe joint and is used to filter the refrigerant flowing through the third pipe joint.

[0025] In some embodiments of the present invention, the filter device is installed at an end of the third pipe joint away from the main valve pipe.

[0026] In some embodiments of the present invention, the filter device includes a filter cartridge and a first filter element, one end of the filter cartridge is installed on an end of the third pipe joint away from the main valve pipe, and the first filter element is installed in the inner cavity of the filter cartridge.

[0027] In some embodiments of the present invention, along the direction away from the third pipe joint, the filter cartridge includes a first diameter reducing section and a diameter expanding section connected in sequence, the first diameter reducing section is connected to the third pipe joint, and along the first diameter reducing section from one end close to the third pipe joint to the end away from the third pipe joint, the inner diameter of the first diameter reducing section gradually increases, and the inner diameter of the diameter expanding section is larger than the inner diameter of the third pipe joint.

[0028] In some embodiments of the present invention, the filter device includes a second filter element, and the second filter element is installed in the third pipe joint.

[0029] In a second aspect, the present invention proposes an outdoor unit of a HVAC equipment, comprising a shell, a heat exchanger, a compressor and a four-way valve assembly as described in any one of the above technical solutions; the four-way valve assembly is respectively connected and communicated with the compressor and the heat exchanger.

[0030] In a third aspect, the present invention proposes a HVAC equipment, comprising a HVAC equipment indoor unit and a HVAC equipment outdoor unit as shown in any one of the above technical solutions, wherein the HVAC equipment indoor unit and the HVAC equipment outdoor unit are connected by a pipeline. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] By reading the detailed description of the preferred embodiment below, various other advantages and benefits will become clear to those of ordinary skill in the art. The accompanying drawings are only used for the purpose of illustrating the preferred embodiment and are not considered to be limitations of the present invention. Moreover, the same reference numerals are used to represent the same components throughout the accompanying drawings.

[0032] In the attached picture:

[0033] Figure 1 The structure diagram of the four-way valve assembly provided according to the first embodiment of the present invention is schematically shown;

[0034] Figure 2 A schematic diagram of the structure of a filter component provided according to Embodiment 1 of the present invention is shown schematically;

[0035] Figure 3 for Figure 2 A magnified view of part a;

[0036] Figure 4 A schematic diagram of the structure of another filter component provided according to the first embodiment of the present invention is shown;

[0037] Figure 5 for Figure 4 A magnified view of part b;

[0038] Figure 6 The schematic diagram of the structure of the first temperature detection component provided according to the first embodiment of the present invention is shown;

[0039] Figure 7 The structure diagram of the four-way valve assembly provided in accordance with the second embodiment of the present invention is schematically shown in the first viewing angle;

[0040] Figure 8 The structure diagram of the four-way valve assembly provided according to the second embodiment of the present invention is schematically shown in the second viewing angle;

[0041] Fig. 9 The schematic diagram of the structure of the adapter component provided according to the second embodiment of the present invention is shown;

[0042] Fig.10 A partial structural diagram of a four-way valve assembly provided according to Embodiment 2 of the present invention is schematically shown;

[0043] Fig.11 The structure diagram of the filter component provided according to the second embodiment of the present invention is schematically shown;

[0044] Fig.12 A partial structural diagram of a four-way valve assembly provided according to Embodiment 3 of the present invention is schematically shown;

[0045] Fig.13 A partial structural diagram of another four-way valve assembly provided according to Embodiment 3 of the present invention is schematically shown;

[0046] Fig.14 A schematic diagram of a refrigerant flow path of a HVAC device provided according to a fifth embodiment of the present invention is schematically shown.

[0047] The reference numerals are as follows:

[0048] 1000, four-way valve assembly;

[0049] 10. Valve body; 11. Main valve pipe; 12. First pipe joint; 121. Main pipe section; 122. Check valve pipe section; 13. Second pipe joint; 14. Third pipe joint; 15. Fourth pipe joint; 16. Pilot valve;

[0050] 20. Filter component; 21. Filter cartridge; 211. First diameter-reducing section; 212. Expanding section; 213. Second diameter-reducing section; 22. First filter element; 23. Second filter element;

[0051] 30. a first pressure switch component; 40. a second pressure switch component;

[0052] 50. first temperature detection component; 51. first heat conducting member; 511. first opening; 52. first temperature detection member;

[0053] 60. Second temperature detection component; 70. First pressure detection component; 80. Second pressure detection component;

[0054] 90. third pressure detection component; 91. pressure sensing mechanism; 92. first conductive member; 93. second conductive member; 931. bending portion;

[0055] 100, adapter component; 101, circuit board; 102, mounting seat; 1021, first wire hole; 1022, second wire hole; 103, cover body;

[0056] 110, first line; 120, second line;

[0057] 130. mounting member; 131. connecting hole; 132. warping portion;

[0058] 200, exhaust pipe; 300, air inlet 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, HVAC equipment outdoor unit; 3000, HVAC equipment indoor unit. DETAILED DESCRIPTION

[0059] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. On the contrary, these embodiments are provided in order to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0060] It should be understood that the terms used herein are only for the purpose of describing specific example embodiments and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "include", "comprise", "contain", and "have" are inclusive, and therefore specify the existence of stated features, steps, operations, elements and / or parts, but do not exclude the existence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not interpreted as necessarily requiring them to be performed in the specific order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0061] Although the terms first, second, third, etc. can be used in the text 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 can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0062] For ease of description, spatial relative terms may be used herein to describe the relationship of one element or feature relative to another element or feature as shown in the figure, such as "inside", "outside", "inner side", "outer side", "below", "below", "above", "above", etc. Such spatial relative terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figure. For example, if the device in the figure is turned over, then the elements described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features". Therefore, the example term "below..." can include both upper and lower orientations. The device can be oriented otherwise (rotated 90 degrees or in other directions) and the spatial relative descriptors used in the text are interpreted accordingly.

[0063] Embodiment 1

[0064] Combined with Figure 1 As shown, this embodiment provides a four-way valve assembly 1000, including a valve body 10, a filter component 20, a first pressure switch component 30, a second pressure switch component 40, a first temperature detection component 50, a second temperature detection component 60, a third pressure detection component 90 and a transfer component 100 and other functional devices.

[0065] Among them, the valve body 10 of this embodiment includes a main valve tube 11, a first pipe joint 12, a second pipe joint 13, a third pipe joint 14, a fourth pipe joint 15 and a pilot valve 16. The main valve tube 11 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 16 is installed outside the valve body 10. The pilot valve 16 is connected to the chamber of the valve body 10 through capillaries at both ends, and the pilot valve 16 can drive the switching mechanism to perform switching.

[0066] The first pipe joint 12, the second pipe joint 13, the third pipe joint 14 and the fourth pipe joint 15 are all joint pipe sections extending outward from the side wall of the main valve pipe 11. The first pipe joint 12 is used to connect the exhaust pipe 200 of the HVAC equipment. The exhaust pipe 200 can be understood as a D pipe used to connect the exhaust port of the compressor 900. The first pipe joint 12 is provided with an air inlet at the end away from the valve body 10. The air inlet is used to connect to the exhaust pipe 200. The refrigerant flowing out of the exhaust port of the compressor 900 enters the chamber of the four-way valve assembly 1000 through the exhaust pipe 200 and the first pipe joint 12 in turn.

[0067] The second pipe joint 13 is used to connect the air intake pipe 300 of the HVAC equipment. The air intake pipe 300 can be understood as an S-tube used to connect the return air port of the compressor 900. The second pipe joint 13 and the first pipe joint 12 can be respectively located on both sides of the valve body 10 in the radial direction. The refrigerant in the four-way valve assembly 1000 can flow back to the compressor 900 through the second pipe joint 13 and the air intake pipe 300 in turn.

[0068] The third pipe joint 14 is used to connect the first refrigerant flow path 400, which can be understood as an E-tube for connecting the first heat exchanger. The fourth pipe joint 15 is used to connect the second refrigerant flow path 500, which can be understood as a C-tube 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.

[0069] It should be noted that, since the basic working principle of the four-way valve assembly 1000 is well known to those skilled in the art, this embodiment does not provide any detailed description thereof, and those skilled in the art may refer to relevant technologies for understanding.

[0070] In the related art, multiple electrical components are generally directly connected to the control device of the HVAC equipment through lines. The control device can be the central control board of the outdoor unit of the HVAC equipment (including at least one of PLC, MCU and processor). Each electrical component has at least one line. Multiple lines of multiple electrical components require complex line layout to be connected to the control device, which occupies the internal space of the outdoor unit of the HVAC equipment and increases the complexity of the internal structure of the body.

[0071] In view of this, the present embodiment adds an adapter component 100, and the electrical components are installed on the first pipe joint 12 and / or the second pipe joint 13. The adapter component 100 is directly or indirectly installed on the main valve pipe 11, and the adapter component 100 is electrically connected to each electrical component through the first line 110, that is, each electrical component is electrically connected to the adapter component 100 through at least one first line 110, and then the adapter component 100 is electrically connected to the control device through the second line 120.

[0072] In this structure, since the electrical components are installed on the first pipe joint 12 and / or the second pipe joint 13, the connection with the adapter component 100 can be achieved through a shorter first line 110, and then the adapter component 100 only needs at least one second line 120 to achieve the telecommunication connection with the control device, and only the second line 120 needs to be routed in the body, which simplifies the lines and reduces the space occupied by the lines in the body, thereby reducing the body size and reducing the production cost.

[0073] The multiple electrical components of this embodiment include at least one of a temperature detection component, a pressure switch component and a pressure detection component. For example, the multiple electrical components include Figure 1 The first pressure switch component 30, the second pressure switch component 40, the first temperature detection component 50, the second temperature detection component 60 and the third pressure detection component 90.

[0074] In the present embodiment, the adapter component 100 may be an electric control box, an adapter box, etc. The adapter component 100 may also include Figure 1 A circuit board 101 in the embodiment, the third pressure detection component 90 can be directly connected to the circuit board 101 through one of the first lines 110, and then be electrically connected to the main control board of the outdoor unit of the HVAC equipment through the circuit board 101. The circuit board 101 can be understood as a circuit board for switching.

[0075] By first connecting the above-mentioned electrical components to the circuit board 101 and then connecting to the main control board through the circuit board 101, compared with the method of directly connecting the above-mentioned functional devices to the control devices (not shown in the figure), the conductive circuit can be simplified, the internal space of the outdoor unit of the HVAC equipment can be further saved, and the production efficiency can be improved and the production cost can be reduced.

[0076] The adapter component 100 and the pilot valve 16 of this embodiment are respectively located on opposite sides of the main valve tube 11. The adapter component 100 may include only a circuit board 101, which is directly mounted on the main valve tube 11. Alternatively, the adapter component 100 may also include a circuit board 101. Figure 3 and Figure 4 The mounting seat 102 and the cover body 103 form a box structure for accommodating the circuit board 101.

[0077] Combined with Figure 2-5 As shown, different from the method of connecting the filter component 20 and the third pipe joint 14 through an intermediate pipeline in the related art, the embodiment of the present application directly installs the filter component 20 on the third pipe joint 14, specifically, the filter component 20 is installed on the end of the third pipe joint 14 away from the main valve pipe 11. The filter component 20 can filter the refrigerant flowing through the third pipe joint 14, and the intermediate pipeline between the filter component 20 and the third pipe joint 14 is omitted, so that the body structure of the outdoor unit of the HVAC equipment can be simplified to a certain extent, the overall volume of the body can be reduced, and a certain production and manufacturing cost can also be reduced.

[0078] The filter component 20 of this embodiment includes a filter cartridge 21 and a first filter element 22. One end of the filter cartridge 21 is installed on the end of the third pipe joint 14 away from the main valve pipe 11. The installation method can be an integrated connection method such as welding or bonding, or the filter cartridge 21 and the third pipe joint 14 can be designed as an integral molding structure. The filter cartridge 21 is used to receive the refrigerant flowing out of the third pipe joint 14 and to transport the refrigerant to the heat exchanger of the indoor unit of the HVAC equipment.

[0079] In some embodiments, the filter cartridge 21 of this embodiment is welded to the third pipe joint 14. The welding method may be as follows: Figure 2 and 3 The upper end of the filter cartridge 21 is welded to the lower end of the third pipe joint 14 as shown, or it can be as follows Figure 4 and 5 As shown, the upper end of the filter cartridge 21 is butt-welded to the lower end of the third pipe joint 14 .

[0080] The first filter element 22 of this embodiment is installed in the inner cavity of the filter cartridge 21. The installation method of the first filter element 22 can be a fixed connection or a detachable connection. The first filter element 22 is used to filter the refrigerant flowing through the filter cartridge 21. The first filter element 22 can be a filter mesh or a filter element.

[0081] Combined with the attachment again Figure 2 and 3 As shown, in some examples, optionally, the radial dimension of the inner wall of the filter cartridge 21 of this embodiment is greater than the radial dimension of the inner wall of the third pipe joint 14 .

[0082] Specifically, the filter cartridge 21 of this embodiment can be designed to include a first reducing section 211, an expanding section 212 and a second reducing section 213 that are connected in sequence. One end of the first reducing section 211 is connected to the third pipe joint 14. In a manner away from the third pipe joint 14, the inner diameter of the first reducing section 211 gradually increases, and the minimum inner diameter of the first reducing section 211 is greater than or equal to the inner diameter of the third pipe joint 14.

[0083] The inner diameter of the expanded diameter section 212 is greater than the inner diameter of the third pipe joint 14, and the inner diameter of the expanded diameter section 212 is greater than or equal to the maximum inner diameter of the first reduced diameter section 211. The second reduced diameter section 213 is connected to one end of the expanded diameter section 212 away from the third pipe joint 14, and along the direction away from the third pipe joint 14, the inner diameter of the second reduced diameter section 213 of this embodiment gradually decreases.

[0084] Since the inner diameter of the filter cartridge 21 is relatively large, the filtering area of ​​the first filter element 22 can be increased, thereby improving the filtering efficiency. Moreover, after the refrigerant enters the filter cartridge 21, the flow rate is increased, thereby further improving the filtering efficiency.

[0085] Combined with Figure 1 and attached Figure 6 As shown, different from the method of connecting the temperature detection structure and the first pipe joint 12 through an intermediate pipeline in the related art, the embodiment of the present application directly installs the first temperature detection component 50 on the first pipe joint 12 to detect the temperature of the first pipe joint 12. In addition, the four-way valve assembly 1000 of this embodiment may also include a second temperature detection component 60, which is directly installed on the second pipe joint 13 to detect the temperature of the second pipe joint 13.

[0086] The first temperature detection component 50 of this embodiment includes a first heat conductive member 51 and a first temperature detection member 52. The first heat conductive member 51 can be made of a heat conductive material in whole or in part. The heat conductive material can be iron, copper, aluminum metal or alloy material, or heat conductive material such as carbon fiber and ceramic. The first temperature detection member 52 can be a temperature detection element such as a temperature sensor. Specifically, the material of the first heat conductive member 51 can be designed to be the same as the material of the first pipe joint 12, and the two can be connected as a whole by welding, which can improve the thermal conductivity while improving the connection stability.

[0087] The first heat-conducting member 51 may be in a shape similar to a cylinder, a square column, etc., and a circular arc surface is provided on the outer side of the first heat-conducting member 51, and the circular arc surface is matched with the outer wall surface of the first pipe joint 12, so as to facilitate the installation of the first heat-conducting member 51 on the first pipe joint 12. A first accommodating cavity is provided inside the first heat-conducting member 51, and the first temperature detecting member 52 is installed in the first accommodating cavity and fits with the inner wall of the first heat-conducting member 51. When performing temperature detection, the first heat-conducting member 51 transmits the temperature of the first pipe joint 12 to the first temperature detecting member 52, so as to detect the temperature of the first pipe joint 12.

[0088] In order to facilitate the installation of the first temperature detection component 52 and to facilitate the connection of the first temperature detection component 52 to other control structures through lines, a first opening 511 can also be provided at one end (the upper end in the figure) of the first heat-conducting component 51 of the present embodiment, and the first temperature detection component 52 is inserted into the first accommodating cavity through the first opening 511. After the first temperature detection component 52 is installed in the first accommodating cavity, it is necessary to ensure that the first temperature detection component 52 can be tightly attached to or pressed against the inner wall surface of the first heat-conducting component 51. Therefore, the shape of the first temperature detection component 52 needs to match the shape of the first accommodating cavity.

[0089] The structure of the second temperature detection component 60 of this embodiment may be the same as the aforementioned first temperature detection component 50 , so this embodiment does not describe the second temperature detection component 60 in detail, and those skilled in the art may understand the second temperature detection component 60 with reference to the first temperature detection component 50 .

[0090] It should be noted that the "direct installation" described in this embodiment means that one component is at least partially directly connected to another component. For example, at least a portion of the first temperature detection component 50 of this embodiment is directly connected to the first pipe joint 12. Similarly, the direct installation of the following embodiments can also be understood in this way.

[0091] Combined with Figure 1 As shown, in order to further optimize the internal space of the HVAC equipment outdoor unit and simplify the structure, the present embodiment also directly integrates the one-way valve into the first pipe joint 12. Accordingly, the length of the first pipe joint 12 needs to be lengthened. Therefore, the present embodiment designs the first pipe joint 12 to include a connected main pipe section 121 and a one-way valve pipe section 122. The main pipe section 121 and the one-way valve pipe section 122 can be directly integrally formed during processing, or connected into one by welding. The main pipe section 121 is located between the valve body 10 and the one-way valve pipe section 122, and is connected and communicated with the valve body 10.

[0092] The function of the one-way valve of this embodiment is to allow the refrigerant to enter the four-way valve assembly 1000 only from the compressor 900, and to prevent the refrigerant from flowing back from the four-way valve assembly 1000 to the compressor 900. The one-way valve pipe section 122 is provided with the above-mentioned air inlet at one end away from the main pipe section 121, and the air inlet is used to connect to the exhaust port of the compressor 900. The one-way valve pipe section 122 is provided with a valve core (not shown in the figure) inside, and the valve core is used to open and close the connection between the air inlet and the main pipe section 121.

[0093] Furthermore, a valve seat and a retaining ring (not shown in the figure) may be provided in the one-way valve pipe section 122, and the valve core may move axially along the one-way valve pipe section 122 under the flow of the refrigerant. When the valve core moves to cooperate with the valve seat, the connection between the air inlet and the main pipe section 121 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 connects the air inlet and the main pipe section 121.

[0094] The above-mentioned structure in which the one-way valve is directly integrated into the first pipe joint 12 omits the intermediate connecting pipeline, thereby simplifying the machine structure, reducing the overall volume of the machine, and also reducing certain production costs to a certain extent.

[0095] Combined with Figure 1 As shown, different from the related art in which the pressure switch is connected through an intermediate structure (such as a bracket, a pipeline, etc.), this embodiment provides a first interface on the first pipe joint 12, and a second interface on the second pipe joint 13. The first pressure switch component 30 is installed on the first interface and communicates with the first pipe joint 12 through the first interface, and the second pressure switch component 40 is installed on the second interface and communicates with the second pipe joint 13 through the second interface.

[0096] It should be noted that since the first interface, the second interface and other interfaces are blocked by the first pressure switch component 30 and the second pressure switch component 40, the interface structures of the first interface and the second interface are not marked in the drawings in this embodiment.

[0097] The first pressure switch component 30 can be a high-pressure pressure switch, and the second pressure switch component 40 can be a low-pressure pressure switch. The high-pressure information refers to the pipeline pressure range that can be between tens to hundreds of Pascals (Pa) to hundreds of 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 3000kPa (3MPa) and 4500kPa (4.5MPa). The low-pressure information can be a pipeline pressure between tens of kilopascals and hundreds of kilopascals, such as between 300kPa (0.3MPa) and 700kPa (0.7MPa). The "low pressure" and "high pressure" in the remaining embodiments are understood in the same way as in this embodiment.

[0098] The first pressure switch component 30 monitors and controls the high-pressure state of the HVAC equipment to ensure that the system operates within a safe range. Specifically, the first pressure switch component 30 detects the pressure information in the first pipe joint 12. When the pressure exceeds a preset safety threshold, the first pressure switch component 30 cuts off the power supply or sends a signal to stop the operation of the compressor 900.

[0099] The second pressure switch component 40 monitors and controls the low-pressure state of the HVAC equipment to ensure that the system operates within a safe range. Specifically, the second pressure switch component 40 detects the pressure information in the second pipe joint 13. When the pressure is lower than the preset safety threshold, the second pressure switch component 40 will cut off the power supply or send a signal to stop the operation of the compressor 900. The second pressure switch component 40 can prevent the compressor 900 from operating abnormally due to a low-pressure state, such as liquid operation or poor refrigeration effect.

[0100] Combined with Figure 1 As shown, different from the related art in which the pressure sensor and the four-way valve assembly 1000 are connected through an intermediate structure (such as a bracket, a pipeline, etc.), the third pressure detection component 90 of this embodiment is directly integrated into the four-way valve assembly 1000, a part of the third pressure detection component 90 is installed on the first pipe joint 12, and the other part is installed on the second pipe joint 13, and the third pressure detection component 90 is configured to be able to simultaneously detect the pressure information of the first pipe joint 12 and the second pipe joint 13.

[0101] This third pressure detection component 90 includes a pressure sensing mechanism 91, a first conductive member 92, and a second conductive member 93. The pressure sensing mechanism 91 may include one or two pressure sensing elements. When the number of the pressure sensing elements is one, the circuit of one pressure sensing element can process and distinguish the pressure signals from the first pipe joint 12 and the second pipe joint 13 respectively. The pressure sensing element is located in the housing, so it is not shown in the figure. Of course, two pressure sensing elements can also be integrated in a sensor housing, one of which is directly connected to the first conductive member 92, and the other is directly connected to the second conductive member 93, and the two pressure sensing elements process the pressure signals from the first pipe joint 12 and the second pipe joint 13 respectively (this embodiment is not shown in the figure).

[0102] The pressure sensing element of this embodiment may be located in the sensor housing, one end of the first conductive member 92 is connected and communicated with the housing of the pressure sensing element, and the other end of the first conductive member 92 is connected and communicated with the fifth interface of the first pipe joint 12. Similarly, one end of the second conductive member 93 of this embodiment is connected and communicated with the pressure sensing element, and the other end of the second conductive member 93 is connected and communicated with the sixth interface of the second pipe joint 13. The pressure sensing element is configured to detect pressure information in the first pipe joint 12 through the first conductive member 92, and detect pressure information in the second pipe joint 13 through the second conductive member 93.

[0103] The first conductive member 92 and the second conductive member 93 can be rigid or flexible tube structures, which are used as a part of the third pressure detection component 90 to assist the pressure sensing element to collect pressure information of the first pipe joint 12 and the second pipe joint 13 .

[0104] This structure integrates the third pressure detection component 90 and the second pressure detection component 80 in the first embodiment to realize the pressure detection of the first pipe joint 12 and the second pipe joint 13 only through the third pressure detection component 90, which can further simplify the structure, improve the integration of the four-way valve assembly 1000, and reduce the body volume.

[0105] In some examples, optionally, the first conductive member 92 can be integrally connected to the first pipe joint 12, and the second conductive member 93 can also be integrally connected to the second pipe joint 13. The integral connection method may include welding, bonding, hot melt connection, etc., and may also include an integral molding method during processing.

[0106] In order to further optimize the space and avoid structures such as the pilot valve 16 structure, in some examples, optionally, the second conducting member 93 of the present embodiment is provided with a bending portion 931, and the bending portion 931 is arranged facing the valve body 10, the first pipe joint 12 and the second pipe joint 13, and respectively forms a gap with part of the valve body 10, part of the first pipe joint 12 and part of the second pipe joint 13, so that the bending portion 931, the valve body 10, part of the valve body 10, part of the first pipe joint 12 and part of the second pipe joint 13 enclose an installation space.

[0107] A portion of the pilot valve 16 of this embodiment is located within the installation space, thereby reducing the possibility of mutual interference between the second conducting member 93 and the pilot valve 16. Moreover, when the second conducting member 93 is a rigid structure, the second conducting member 93 can also be used to support and protect the outer side of the pilot valve 16.

[0108] Embodiment 2

[0109] Combined with Figure 7-10 As shown, the difference between this embodiment and Example 1 is that the filter component 20 is directly installed in the third pipe joint 14. Specifically, the filter component 20 of this embodiment includes a second filter element 23. The second filter element 23 can be a filter mesh or a filter element. The second filter element 23 is directly installed in the third pipe joint 14. Compared with the filter component 20 in Example 1, the filter cartridge 21 can be omitted.

[0110] Combined with Fig.11 As shown, the adapter component 100 of this embodiment may also include a mounting seat 102 and a cover body 103. The mounting seat 102 includes a bottom wall and side walls connected to the bottom wall. The cover body 103 is mounted on the mounting seat 102. The mounting method may be a snap connection, a bolt connection, or other methods that are easy to disassemble and assemble. The mounting seat 102 and the cover body 103 form a box structure. The cover body 103 and the receiving groove of the mounting seat 102 form a cavity for mounting the circuit board 101. In addition, it is also necessary to open a wiring hole on the cover body 103 or the mounting seat 102 to facilitate the connection between the above-mentioned functional device and the circuit board 101.

[0111] Specifically, a first wire passing hole 1021 and a second wire passing hole 1022 can be opened on the side wall of the mounting base 102 of this embodiment. The first wire passing hole 1021 is used for one end of the first line 110 to pass through and be inserted into the circuit board 101, and the second wire passing hole 1022 is used for one end of the second line 120 to pass through and be inserted into the circuit board 101.

[0112] Embodiment 3

[0113] Combined with Fig.12 and attached Fig.13As shown (the adapter component 100 is not shown in the figure), the difference between this embodiment and embodiment one and embodiment two lies in the different pressure detection structures. The pressure detection structure of this embodiment includes a first pressure detection component 70 and a second pressure detection component 80. The first pressure detection component 70 is installed on the first pipe joint 12 and is connected to the first pipe joint 12. The second pressure detection component 80 is installed on the second pipe joint 13 and is connected to the second pipe joint 13.

[0114] The first pressure detection component 70 is used to detect the pressure information in the first pipe joint 12, and the pressure information can be the high pressure information in the first pipe joint 12. The flow rate of the fluid can be calculated through the high pressure information, and the high pressure information can be fed back to the control system for automatic or manual adjustment of the opening of the four-way valve assembly 1000 to achieve the flow regulation required by the system. In addition, the first pressure detection component 70 can monitor the fluid pressure changes in the system in real time, which is helpful for timely diagnosis of pipeline blockage, valve failure or system leakage. The above-mentioned high pressure information refers to the pressure range that can be between tens to hundreds of Pascals (Pa) and hundreds of 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 3000kPa (3MPa) and 4500kPa (4.5MPa).

[0115] In this embodiment, the first pressure detecting component 70 is directly installed on the third interface of the first pipe joint 12, and is connected to the first pipe joint 12 through the third interface, omitting the intermediate structure in which the first pressure detecting component 70 is respectively connected to the four-way valve assembly 1000, thereby further simplifying the body structure, reducing the overall volume of the body, and also reducing a certain amount of production and manufacturing costs.

[0116] The structure of the second pressure detection component 80 is the same as or similar to that of the aforementioned first pressure detection component 70. For example, both can be pressure sensors. The detection range of the second pressure detection component 80 and the first pressure detection component 70 can be different. For example, the first pressure detection component 70 can detect high pressure information, and the second pressure detection component 80 is used to detect low pressure information of the second pipe joint 13.

[0117] Similar to the installation method of the first pressure detection component 70, the second pressure detection component 80 of this embodiment is also directly installed on the fourth interface of the second pipe joint 13, and is connected to the second pipe joint 13 through the fourth interface, thereby further saving space in the machine body and simplifying the structure.

[0118] The first pressure detection component 70 and the second pressure detection component 80 of this embodiment may both include a housing and an internal pressure sensing element. The housing and the first pipe joint 12 and the second pipe joint 13 may be made of the same or similar materials. Figure 6 and Figure 7 The structures of the first pressure detection component 70 and the second pressure detection component 80 are similar, except that Figure 6 The shell of the first pressure detecting component 70 and the second pressure detecting component 80 also includes a pipe section for connecting and communicating with the first pipe joint 12 or the second pipe joint 13. The pipe section is different from the existing intermediate pipeline for connecting the sensor and the four-way valve assembly 1000. The pipe section of the shell described in this embodiment is shorter and is part of the shell or the sensor.

[0119] In some examples, optionally, the first pressure detecting component 70 can be integrally connected to the first pipe joint 12, and the second pressure detecting component 80 can also be integrally connected to the second pipe joint 13. 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.

[0120] In addition, the four-way valve assembly 1000 in this embodiment and the embodiment may also include a mounting member 130, the mounting member 130 is provided with a connecting hole 131 for the first pipe joint 12 to pass through, the mounting member 130 is sleeved on the first pipe joint 12 through the connecting hole 131, and the pilot valve 16 and the mounting seat 102 are respectively installed on the front and rear sides of the mounting member 130.

[0121] The mounting member 130 of this embodiment may be a plate-like or sheet-like structure. In order to be able to be more stably connected to the main valve tube 11, the surface of the mounting member 130 of this embodiment facing the main valve tube 11 may be designed as an arc surface, and the arc surface fits the outer wall surface of the main valve tube 11. Furthermore, the mounting member 130 may be connected to the outer wall of the main valve tube 11 by bolts, screws and other components, thereby further improving the installation stability of the mounting member 130 and the pilot valve 16. The mounting member 130 is provided with a raised portion 132 bent relative to the mounting member 130 at one end close to the pilot valve 16. The pilot valve 16 may be mounted on the raised portion 132 by bolts and other components, and fits the outer wall of the main valve tube 11.

[0122] Embodiment 4

[0123] Combined with Fig.14 As shown, this embodiment provides an outdoor unit 2000 of a HVAC equipment, including a shell (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 assembly 1000 as described in any one of the above-mentioned embodiments one to three; the four-way valve assembly 1000 is respectively connected and communicated with the compressor 900 and the heat exchanger.

[0124] Specifically, the first pipe joint 12 of the four-way valve assembly 1000 is connected to the exhaust port of the compressor 900 through the exhaust pipe 200, the second pipe joint 13 is connected to the return air port of the compressor 900 through the intake pipe 300, the third pipe joint 14 is connected to the first heat exchanger 600 through the first refrigerant flow path 400, and the fourth pipe joint 15 is connected to the second heat exchanger 700 of the indoor unit 3000 of the HVAC equipment through the second refrigerant flow path 500.

[0125] The refrigerant in the compressor 900 enters the main valve pipe 11 through the intake pipe 300 and the second pipe joint 13 in turn, then flows into the first refrigerant flow path 400 through the third pipe joint 14, and flows into the first heat exchanger 600 and the second heat exchanger 700 after being processed by the expansion valve 410 and the liquid side stop valve 420 on the first refrigerant flow path 400. The refrigerant in the second heat exchanger 700 enters the fourth pipe joint 15 after being processed by the gas side stop valve 510 on the second refrigerant flow path 500, and then returns to the main valve pipe 11, and then enters the gas-liquid separator 800 through the first pipe joint 12 and the exhaust pipe 200 for oil-liquid separation, and then returns to the compressor again to complete the refrigerant cycle.

[0126] Regarding the structure of the other parts of the HVAC equipment outdoor unit 2000 except the four-way valve assembly 1000, please refer to the relevant technology, and this application will not elaborate on it here.

[0127] Embodiment 5

[0128] Combined with Fig.14 As shown, this embodiment provides a HVAC equipment, including the HVAC equipment outdoor unit 2000 shown in Example 4. In some embodiments, the HVAC equipment also includes a HVAC equipment indoor unit 3000, and the HVAC equipment indoor unit 3000 and the HVAC equipment outdoor unit 2000 are connected through a pipeline.

[0129] Since the refrigerant cycle has been introduced in the fourth embodiment, this embodiment will not elaborate on it. In addition, other structures of the indoor unit 3000 of the HVAC equipment can refer to the relevant technology, and this embodiment will not describe it in detail.

[0130] The above is only a preferred specific implementation of the present invention. The various embodiments can be combined and replaced with each other, but the protection scope of the present invention is not limited thereto. Any changes or replacements that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be based on the protection scope of the claims.

Claims

1. A four-way valve assembly, applied to a HVAC device having a compressor and a control device, characterized in that: include: The valve body comprises a main valve pipe and a first pipe joint and a second pipe joint provided on the main valve pipe, wherein the first pipe joint is used to connect to an exhaust pipe, the exhaust pipe is used to connect to an exhaust port of the compressor, and the second pipe joint is used to connect to an intake pipe, the intake pipe is used to connect to an air return port of the compressor; A plurality of electrical components, wherein the plurality of electrical components include at least one of a temperature detection component, a pressure switch component and a pressure detection component, and each of the electrical components is connected to the first pipe joint and / or the second pipe joint; as well as A transfer component is installed on the main valve pipe, the transfer component is electrically connected to each of the electrical components, and the transfer component is electrically connected to the control device.

2. The four-way valve assembly according to claim 1, characterized in that: The switching component includes a circuit board, which is electrically connected to each of the electrical components through a plurality of first circuits and electrically connected to the control device through a second circuit.

3. The four-way valve assembly according to claim 2, characterized in that: The adapter component also includes a mounting seat installed on the main valve tube, the mounting seat includes a bottom wall and a side wall connected to the bottom wall, the bottom wall and the side wall form a receiving groove, and the circuit board is installed in the receiving groove.

4. The four-way valve assembly according to claim 3, characterized in that: The side wall is provided with a first wire-passing hole for the first wire to pass through, and / or the side wall is provided with a second wire-passing hole for the second wire to pass through.

5. The four-way valve assembly according to claim 3, characterized in that: The adapter component also includes a cover body, which is mounted on the mounting seat and forms a cavity for mounting the circuit board together with the accommodating groove.

6. The four-way valve assembly according to claim 1, characterized in that: The electrical component includes a first temperature detection component, which is installed on the first pipe joint and is used to detect the temperature of the first pipe joint; And / or, the electrical component includes a second temperature detection component, which is installed on the second pipe joint and is used to detect the temperature of the second pipe joint.

7. The four-way valve assembly according to claim 6, characterized in that: The first temperature detection component includes a first heat conductive member and a first temperature detection member. The first heat conductive member is installed on the first pipe joint and is thermally connected to the first pipe joint. The first heat conductive member is provided with a first accommodating cavity. The first temperature detection member is installed in the first accommodating cavity and fits with the inner wall of the first heat conductive member.

8. The four-way valve assembly according to claim 7, characterized in that: A first opening is provided at one end of the first heat conducting member, the first opening is communicated with the first accommodating cavity, and the first temperature detecting member is inserted into the first accommodating cavity through the first opening.

9. The four-way valve assembly according to claim 1, characterized in that: The electrical component comprises a first pressure switch component, a side wall of the first pipe joint is provided with a first interface, the first pressure switch component is installed on the first interface and is connected with the first pipe joint through the first interface; And / or, the electrical component includes a second pressure switch component, the side wall of the second pipe joint is provided with a second interface, the second pressure switch component is installed on the second interface and is connected to the second pipe joint through the second interface.

10. The four-way valve assembly according to claim 1, characterized in that: The plurality of electrical components include a first pressure detection component, a side wall of the first pipe joint is provided with a third interface, the first pressure detection component is installed on the third interface and is connected with the first pipe joint through the third interface; And / or, the multiple electrical components include a second pressure detection component, the side wall of the second pipe joint is provided with a fourth interface, the second pressure detection component is installed on the fourth interface and is connected to the second pipe joint through the fourth interface.

11. The four-way valve assembly according to claim 1, characterized in that: The multiple electrical components include a third pressure detection component, which is respectively connected to the first pipe joint and the second pipe joint and is used to detect pressure information in the first pipe joint and the second pipe joint.

12. The four-way valve assembly according to claim 11, characterized in that: The third pressure detection component includes a pressure sensing element, a first conductive piece and a second conductive piece. The side wall of the first pipe joint is provided with a fifth interface, and the side wall of the second pipe joint is provided with a sixth interface. One end of the first conductive piece is connected and communicated with the pressure sensing element, and the other end of the first conductive piece is installed on the fifth interface and communicated with the first pipe joint through the fifth interface. 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 installed on the sixth interface and communicated with the second pipe joint through the sixth interface. 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.

13. The four-way valve assembly according to claim 12, characterized in that: The second conducting member is provided with a bending portion, which is bent on one side facing the main valve pipe, the first pipe joint and the second pipe joint. The bending portion, the main valve pipe, the first pipe joint and the second pipe joint form an installation space. The four-way valve assembly also includes a pilot valve, which is installed on one side of the four-way valve assembly body and is partially located in the installation space.

14. The four-way valve assembly according to claim 13, characterized in that: The four-way valve assembly also includes a mounting member, which is provided with a connecting interface for the first pipe joint to pass through. The mounting member is sleeved on the first pipe joint through the connecting interface and is connected to the main valve pipe. The pilot valve is connected to one side of the mounting member, and the adapter component is installed on the other side of the mounting member.

15. The four-way valve assembly according to claim 14, characterized in that: The surface of the mounting member facing the main valve tube is an arc surface, and the arc surface fits with the outer wall surface of the main valve tube.

16. The four-way valve assembly according to any one of claims 1 to 15, characterized in that: The first pipe joint includes a connected main pipe section and a one-way valve pipe section, the main pipe section is located between the main valve pipe and the one-way valve pipe section, the main pipe section is connected and communicated with the main valve pipe, the one-way valve pipe section is used to connect to the exhaust port of the compressor, a valve core is provided inside the one-way valve pipe section, and the valve core is used to control the one-way valve pipe section to be unidirectional from the one-way valve pipe section to the main pipe section.

17. The four-way valve assembly according to any one of claims 1 to 15, characterized in that: The valve body also includes a third pipe joint arranged on the main valve pipe, and the third pipe joint is used to connect the first refrigerant flow path, and the first refrigerant flow path is used to connect the heat exchanger of the HVAC equipment. The four-way valve assembly also includes a filter component, and the filter component is installed on the third pipe joint and is used to filter the refrigerant flowing through the third pipe joint.

18. The four-way valve assembly according to claim 17, characterized in that: The filter component is installed at one end of the third pipe joint away from the main valve pipe.

19. The four-way valve assembly according to claim 18, characterized in that: The filter component comprises a filter cartridge and a first filter element. One end of the filter cartridge is mounted on an end of the third pipe joint away from the main valve pipe, and the first filter element is mounted in the inner cavity of the filter cartridge.

20. The four-way valve assembly according to claim 19, characterized in that: Along the direction away from the third pipe joint, the filter cartridge includes a first diameter-reducing section and a diameter-expanding section which are connected in sequence, the first diameter-reducing section is connected to the third pipe joint, and along the first diameter-reducing section from one end close to the third pipe joint to the end away from the third pipe joint, the inner diameter of the first diameter-reducing section gradually increases, and the inner diameter of the diameter-expanding section is larger than the inner diameter of the third pipe joint.

21. The four-way valve assembly according to claim 18, characterized in that The filter component includes a second filter element, and the second filter element is installed in the third pipe joint.

22. 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 assembly as described in any one of claims 1 to 21, wherein the heat exchanger, the compressor and the four-way valve assembly are all arranged in the shell, and the four-way valve assembly is connected and communicated with the compressor and the heat exchanger respectively.

23. A HVAC equipment, characterized in that: It comprises a HVAC equipment indoor unit and a HVAC equipment outdoor unit as claimed in claim 22, wherein the HVAC equipment indoor unit and the HVAC equipment outdoor unit are connected via a pipeline.

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