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

Abstract

The utility model 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 and a filtering device, the valve body comprises a main valve pipe and a first pipe joint, a second pipe joint and a third pipe joint which are connected to the main valve pipe, the first pipe joint is used for communicating with an exhaust port of the compressor, the second pipe joint is used for communicating with an air return port of the compressor, and the third pipe joint is used for communicating with the heat exchanger; the filtering device is installed on the third pipe connector and used for filtering the refrigerant flowing through the third pipe connector. The filtering device is directly installed on the third pipe connector, so that the filtering device can filter a refrigerant flowing through the third pipe connector, a middle pipeline between the filtering device and the third pipe connector is omitted, and therefore the machine body structure of the outdoor unit of the heating and ventilation equipment can be simplified to a certain degree, and the overall size of the machine body is reduced; and a 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, in particular to a four-way valve assembly, an outdoor unit of HVAC equipment and HVAC equipment. Background Art

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

[0003] The four-way valve assembly 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 assembly needs to perform temperature detection to ensure the stable operation of HVAC equipment. Specifically, the four-way valve assembly and the temperature detection component are usually connected through an intermediate pipeline, which makes 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 assembly, which is applied to HVAC equipment with a compressor and a heat exchanger, and includes a valve body and a filtering device. The valve body includes a main valve pipe, a first pipe joint, a second pipe joint and a third pipe joint respectively connected to the main valve pipe. The first pipe joint is used to communicate with an exhaust pipe, and the exhaust pipe is used to communicate with the exhaust port of the compressor. The second pipe joint is used to communicate with an intake pipe, and the intake pipe is used to communicate with the return air port of the compressor. The third pipe joint is used to communicate with a first refrigerant flow path, so the first refrigerant pipeline is used to communicate with the heat exchanger; the filtering device is installed on the third pipe joint and is used to filter the refrigerant flowing through the third pipe joint.

[0007] According to the four-way valve assembly provided by the utility model, the filtering device is directly installed on the third pipe joint, which not only enables the filtering device to filter the refrigerant flowing through the third pipe joint, but also omits the intermediate pipeline between the filtering device and the third pipe joint, thereby simplifying the body structure of the outdoor unit of HVAC equipment to a certain extent, reducing the overall volume of the body, and also reducing the production and manufacturing cost to a certain extent.

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

[0009] In some embodiments of the utility model, the filtering device is installed at one end of the third pipe joint away from the main valve pipe.

[0010] 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.

[0011] In some embodiments of the utility model, 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.

[0012] 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.

[0013] In some embodiments of the present invention, the four-way valve assembly also includes a switching device and an electrical device. The switching device is installed on the main valve pipe and is used to electrically connect the electrical device and the main control panel of the HVAC equipment outdoor unit of the HVAC equipment.

[0014] In some embodiments of the utility model, the adapter device includes a mounting seat and a center plate, the mounting seat is installed on the main valve pipe, the mounting seat is provided with a receiving groove, the center plate is installed in the mounting seat, and the center plate is used to connect the main control board.

[0015] In some embodiments of the present invention, the adapter device further comprises a cover body, which is mounted on the mounting seat and, together with the accommodating groove, forms a cavity for mounting the center plate.

[0016] In some embodiments of the utility model, the electrical device includes a first temperature detection device and a second temperature detection device, the first temperature detection device is installed on the first pipe joint and is used to detect the temperature of the first pipe joint, the second temperature detection device is installed on the second pipe joint and is used to detect the temperature of the second pipe joint, and the first temperature detection device and the second temperature detection device are respectively electrically connected to the adapter.

[0017] In some embodiments of the present utility model, the electrical component device includes a first pressure switch and a second pressure switch. The first pipe joint is provided with a first interface, and the second pipe joint is provided with a second interface. The first pressure switch is installed at the first interface and is connected to the first pipe joint through the first interface. The second pressure switch is installed at the second interface and is connected to the second pipe joint through the second interface. The first pressure switch and the second pressure switch are respectively electrically connected to the adapter device.

[0018] In some embodiments of the present utility model, the electrical component device includes a first pressure detection device and a second pressure detection device. The first pipe joint is provided with a third interface, and the second pipe joint is provided with a fourth interface. The first pressure detection device is installed at the third interface and is connected to the first pipe joint through the third interface. The second pressure detection device is installed at the fourth interface and is connected to the second pipe joint through the fourth interface. The first pressure detection device and the second pressure detection device are respectively electrically connected to the adapter device.

[0019] In some embodiments of the present utility model, the electrical component device includes a third pressure detection device. The third pressure detection device is respectively connected to the first pipe joint and the second pipe joint and is configured to detect the pressure information in the first pipe joint and the second pipe joint. The third pressure detection device is electrically connected to the adapter device.

[0020] In some embodiments of the present utility model, the third pressure detection device includes a pressure sensing element, a first conducting member, and a second conducting member. The first pipe joint is provided with a fifth interface, and the second pipe joint is provided with a sixth interface. One end of the first conducting member is connected to and communicates with the pressure sensing element. The other end of the first conducting member is installed at the fifth interface and is connected to the first pipe joint through the fifth interface. One end of the second conducting member is connected to and communicates with the pressure sensing element. The other end of the second conducting member is installed at the sixth interface and is connected to the second pipe joint through the sixth interface. 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.

[0021] In some embodiments of the present utility model, 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 located between the valve body and the check valve pipe section. The main pipe section is connected to and communicates with the valve body. The check valve pipe section is used to connect to the exhaust port of the compressor. A valve core is provided inside the check valve pipe section. The valve core is configured to conduct the check valve pipe section unidirectionally from the check valve pipe section to the main pipe section.

[0022] 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 assembly as described in any one of the above technical solutions; the four-way valve assembly is respectively connected to and communicated with the compressor and the heat exchanger.

[0023] 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

[0024] By reading the following detailed description of the preferred embodiments, 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:

[0025] Figure 1 Schematically shows a structural diagram of a four-way valve assembly provided in Embodiment 1 of the present utility model;

[0026] Figure 2 Schematically shows a structural diagram of a filtering device provided in Embodiment 1 of the present utility model;

[0027] Figure 3 is Figure 2 an enlarged view of part a;

[0028] Figure 4 Schematically shows a structural diagram of another filtering component provided in Embodiment 1 of the present invention;

[0029] Figure 5 is Figure 4 an enlarged view of part b;

[0030] Figure 6 Schematically shows a structural diagram of a first temperature detection device provided in Embodiment 1 of the present utility model;

[0031] Figure 7 Schematically shows a structural diagram of a four-way valve assembly provided in Embodiment 2 of the present utility model;

[0032] Figure 8 Schematically shows a structural diagram of a third pipe joint provided in Embodiment 2 of the present utility model;

[0033] Figure 9 Schematically shows a structural diagram of a first type of four-way valve assembly provided in Embodiment 3 of the present utility model;

[0034] Figure 10 The structure diagram of the second four-way valve assembly provided in accordance with the third embodiment of the present utility model is schematically shown;

[0035] Figure 11 The structure diagram of a four-way valve assembly provided according to the fourth embodiment of the utility model is schematically shown;

[0036] Figure 12 The structure diagram of another four-way valve assembly provided according to the fourth embodiment of the utility model at a first viewing angle is schematically shown;

[0037] Figure 13 The structure diagram of another four-way valve assembly provided according to the fourth embodiment of the utility model at a second viewing angle is schematically shown;

[0038] Figure 14 A schematic diagram of the refrigerant flow path of the HVAC equipment provided according to the fourth embodiment of the utility model is schematically shown.

[0039] The reference numerals are as follows:

[0040] 1000, four-way valve assembly; 10, valve body; 11, main valve pipe; 12, first pipe joint; 121, main pipe section; 122, one-way valve pipe section; 13, second pipe joint; 14, third pipe joint; 15, fourth pipe joint; 16, pilot valve; 20, filter device; 21, filter cartridge; 211, first diameter-reducing section; 212, diameter-expanding section; 213, second diameter-reducing section; 22, first filter element; 23, second filter element; 30, first pressure switch; 40, second pressure switch; 50, first temperature detection device; 51, first heat-conducting element; 511, first opening; 52, first temperature detection element; 60, second temperature detection device; 70, first pressure switch; Detection device; 80, second pressure detection device; 90, third pressure detection device; 91, pressure sensing mechanism; 92, first conducting member; 93, second conducting member; 931, bending portion; 100, adapter; 101, center plate; 102, mounting seat; 103, cover; 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

[0041] 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 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.

[0042] 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 thus 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 an execution order is explicitly stated. It should also be understood that additional or alternative steps may be used.

[0043] 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", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, a first element, component, region, layer, or section discussed below may be referred to as a second element, component, region, layer, or section without departing from the teachings of the example embodiments.

[0044] 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 in use or operation other than 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 accordingly interpreted.

[0045] Embodiment 1

[0046] Combined with the attached Figures 1-6 As shown, this embodiment provides a four-way valve assembly 1000, including functional devices such as a valve body 10, a filtering device 20, a first pressure switch 30, a second pressure switch 40, a first temperature detection device 50, a second temperature detection device 60, and a third pressure detection device 90.

[0047] Among them, the valve body 10 of this embodiment includes a main valve pipe 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 pipe 11 is a cylindrical structure with both ends closed and a chamber provided inside. A switching mechanism (not shown in the figure) is provided in the chamber. The pilot valve 16 is installed outside the valve body 10. The pilot valve 16 is communicated with the chamber of the valve body 10 through capillary tubes at both ends, and the pilot valve 16 can drive the switching mechanism to act for commutation.

[0048] 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 segments 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 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 12 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 sequentially enters the chamber of the four-way valve assembly 1000 through the exhaust pipe 200 and the first pipe joint 12.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] Combined with Figures 2-5 As shown, different from the method of connecting the filter device 20 and the third pipe joint 14 through an intermediate pipeline in the related art, the filter device 20 is directly installed on the third pipe joint 14 in the embodiment of the present application. Specifically, the filter device 20 is installed on the end of the third pipe joint 14 away from the main valve pipe 11. The filter device 20 can filter the refrigerant flowing through the third pipe joint 14, and the intermediate pipeline between the filter device 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 cost can also be reduced.

[0053] The filtering device 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.

[0054] 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 .

[0055] The first filter element 22 of this embodiment is installed in the inner cavity of the filter cylinder 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 cylinder 21, and the first filter element 22 can be a filter net or a filter element and other structures.

[0056] In some examples, optionally, the radial dimension of the inner wall of the filter cylinder 21 of this embodiment is larger than the radial dimension of the inner wall of the third pipe joint 14.

[0057] Specifically, the filter cylinder 21 of this embodiment can be designed to include a first reduced-diameter section 211, an enlarged-diameter section 212, and a second reduced-diameter section 213 that are sequentially connected. One end of the first reduced-diameter section 211 is connected to the third pipe joint 14. Along the direction away from the third pipe joint 14, the inner diameter dimension of the first reduced-diameter section 211 gradually increases, and the minimum inner diameter of the first reduced-diameter section 211 is greater than or equal to the inner diameter of the third pipe joint 14.

[0058] The inner diameter of the enlarged-diameter section 212 is larger than the inner diameter of the third pipe joint 14, and the inner diameter of the enlarged-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 enlarged-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.

[0059] Since the inner diameter of the filter cylinder 21 is larger, the filtering area of the first filter element 22 can be increased, and the filtering efficiency can be improved. Moreover, after the refrigerant enters the filter cylinder 21, the flow rate increases, further improving the filtering efficiency.

[0060] Different from the way in the related art of connecting the temperature detection structure and the first pipe joint 12 through an intermediate pipeline, in the embodiment of this application, the first temperature detection device 50 is directly installed 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 can further include a second temperature detection device 60, and the second temperature detection device 60 is directly installed on the second pipe joint 13 to detect the temperature of the second pipe joint 13.

[0061] The first temperature detection device 50 of this embodiment includes a first heat-conducting member 51 and a first temperature detection member 52. The first heat-conducting member 51 can be wholly or partly made of a heat-conducting material. The heat-conducting material can be a metal or alloy material such as iron, copper, aluminum, or a heat-conducting material such as carbon fiber, ceramics, etc. The first temperature detection member 52 can be a temperature detection element such as a temperature sensor. Specifically, the material of the first heat-conducting member 51 can be designed to be the same as the material of the first pipe joint 12, and the two are integrally connected by a welding method, which can improve the connection stability and the heat-conducting performance at the same time.

[0062] 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.

[0063] 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.

[0064] The structure of the second temperature detection device 60 of this embodiment may be the same as that of the aforementioned first temperature detection device 50 , and therefore this embodiment does not describe the second temperature detection device 60 in detail, and those skilled in the art may understand the second temperature detection device 60 by referring to the first temperature detection device 50 .

[0065] 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 part of the first temperature detection device 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.

[0066] In order to further optimize the internal space of the outdoor unit of the HVAC equipment 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.

[0067] 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, and to prevent the refrigerant from flowing back to the compressor from the four-way valve assembly 1000. 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. 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.

[0068] 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.

[0069] 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.

[0070] In addition, the four-way valve assembly 1000 of this embodiment also includes a first pressure switch 30 and a second pressure switch 40, which is different from the related art in which the pressure switches are connected through an intermediate structure (such as a bracket, a pipeline, etc.). Accordingly, this embodiment is provided with a first interface on the first pipe joint 12, and a second interface on the second pipe joint 13. The first pressure switch 30 is installed on the first interface and is connected to the first pipe joint 12 through the first interface, and the second pressure switch 40 is installed on the second interface and is connected to the second pipe joint 13 through the second interface.

[0071] It should be noted that since the first interface, the second interface and other interfaces are blocked by the first pressure switch 30 and the second pressure switch 40, etc., the interface structures of the first interface and the second interface and other interfaces are not marked in the drawings in this embodiment.

[0072] The first pressure switch 30 can be a high-pressure pressure switch, and the second pressure switch 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.

[0073] The first pressure switch 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 30 detects the pressure information in the first pipe joint 12. When the pressure exceeds the preset safety threshold, the first pressure switch 30 will cut off the power supply or send a signal to stop the operation of the compressor.

[0074] The second pressure switch 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 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 40 will cut off the power supply or send a signal to stop the operation of the compressor. The second pressure switch 40 can prevent the compressor from operating abnormally due to the low-pressure state, such as liquid operation or poor refrigeration effect.

[0075] In addition, different from the related art in which a pressure sensor and a four-way valve assembly 1000 are connected through an intermediate structure (such as a bracket, a pipeline, etc.), the third pressure detection device 90 of this embodiment is directly integrated on the four-way valve assembly 1000. A part of the third pressure detection device 90 is installed on the first pipe joint 12, and another part is installed on the second pipe joint 13. The third pressure detection device 90 is configured to be able to detect the pressure information of the first pipe joint 12 and the second pipe joint 13 simultaneously.

[0076] This kind of third pressure detection device 90 includes a pressure sensing mechanism 91, a first conduction member 92, and a second conduction member 93. The pressure sensing mechanism 91 can include one or two pressure sensing elements. When the number of pressure sensing elements is one, the circuit of one pressure sensing element can separately process and distinguish the pressure signals from the first pipe joint 12 and the second pipe joint 13. 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 a sensor housing. One of them is directly connected to the first conduction member 92, and the other is directly connected to the second conduction member 93. The two pressure sensing elements separately process the pressure signals from the first pipe joint 12 and the second pipe joint 13 (this implementation method is not shown in the figure).

[0077] The pressure sensing element of this embodiment can be located inside the sensor housing. One end of the first conduction member 92 is connected and communicated with the housing of the pressure sensing element, and the other end of the first conduction member 92 is connected and communicated with the fifth interface of the first pipe joint 12. Similarly, one end of the second conduction member 93 of this embodiment is connected and communicated with the pressure sensing element, and the other end of the second conduction member 93 is connected and communicated with the sixth interface of the second pipe joint 13. The pressure sensing element is configured to detect the pressure information in the first pipe joint 12 through the first conduction member 92 and detect the pressure information in the second pipe joint 13 through the second conduction member 93.

[0078] The first conducting member 92 and the second conducting member 93 can be rigid or flexible tube structures, which are part of the third pressure detection device 90 and are used to assist the pressure sensing element in collecting the pressure information of the first pipe joint 12 and the second pipe joint 13.

[0079] This structure integrates the third pressure detection device 90 and the second pressure detection device 80 in Embodiment 1, and only the third pressure detection device 90 is used to detect the pressures of the first pipe joint 12 and the second pipe joint 13, which can further simplify the structure, improve the integration degree of the four-way valve assembly 1000, and reduce the volume of the machine body.

[0080] In some examples, optionally, the first conducting member 92 can be integrally connected to the first pipe joint 12, and the second conducting member 93 can also be integrally connected to the second pipe joint 13. The integrally connected methods include welding, bonding, hot melt connection, etc., and can also include the method of integral molding during processing.

[0081] In order to further optimize the space and avoid the structure of the pilot valve 16 and other structures, in some examples, optionally, the second conducting member 93 of this embodiment is provided with a bending portion 931. The bending portion 931 faces the valve body 10, the first pipe joint 12, and the second pipe joint 13, and forms intervals with part of the valve body 10, part of the first pipe joint 12, and part of the second pipe joint 13 respectively, 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.

[0082] A part of the pilot valve 16 of this embodiment is located in the installation space, so that the possibility of interference between the second conducting member 93 and the pilot valve 16 is reduced. 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 outside of the pilot valve 16.

[0083] Embodiment 2

[0084] Combined with the attached Figure 7 and the attached Figure 8 As shown, the difference between this embodiment and Embodiment 1 is that the filtering device 20 is directly installed in the third pipe joint 14. Specifically, the filtering device 20 of this embodiment includes a second filtering member 23. The second filtering member 23 can be a filter net or a filter element, etc. The second filtering member 23 is directly installed in the third pipe joint 14. Compared with the filtering device 20 in Embodiment 1, the filter cartridge 21 can be omitted.

[0085] Embodiment 3

[0086] Combined with the attached Figure 9 and the attached Figure 10As shown in the figure, the second difference between this embodiment and the second embodiment lies in the different pressure detection structures. The pressure detection structure of this embodiment includes a first pressure detection device 70 and a second pressure detection device 80. The first pressure detection device 70 is installed on the first pipe joint 12 and is in communication with the first pipe joint 12. The second pressure detection device 80 is installed on the second pipe joint 13 and is in communication with the second pipe joint 13.

[0087] The first pressure detection device 70 is used to detect the pressure information in the first pipe joint 12. This pressure information can be the high-pressure information in the first pipe joint 12. 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 assembly 1000 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 the pressure range that can be between dozens 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 3000 kPa (3 MPa) and 4500 kPa (4.5 MPa).

[0088] In this embodiment, the first pressure detection device 70 is directly installed on the third interface of the first pipe joint 12 and is in communication with the first pipe joint 12 through the third interface, omitting the intermediate structure of the first pressure detection device 70 connected to the four-way valve assembly 1000 respectively, 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.

[0089] 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 13.

[0090] 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 fourth interface of the second pipe joint 13 and is in communication with the second pipe joint 13 through the fourth interface, thereby further saving the space inside the body and simplifying the structure.

[0091] 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 12 and the second pipe joint 13 can be the same or similar. Figure 6 and Figure 7The structures of the first pressure detection device 70 and the second pressure detection device 80 are similar, except that Figure 6 The shell of the first pressure detection device 70 and the second pressure detection device 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.

[0092] In some examples, optionally, the first pressure detection device 70 can be integrally connected to the first pipe joint 12, and the second pressure detection device 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.

[0093] Embodiment 4

[0094] Combined with Figure 11 , Attachment Figure 12 And attached Figure 13 As shown, the difference between this embodiment and the above-mentioned embodiment is that the four-way valve assembly 1000 of this embodiment also includes a switching device 100, which is installed on the main valve pipe 11 and is used for telecommunication connection between the electrical device and the main control panel of the outdoor unit of the HVAC equipment.

[0095] The adapter 100 may be an electric control box, an electric device adapter box, etc. The adapter 100 may also include Figure 8 The central collector board 101 is a circuit board. The electrical device includes a third pressure detection device 90, which can be directly connected to the central collector board 101 through a line, and then connected to the main control board of the outdoor unit of the HVAC equipment through the central collector board 101. The central collector board 101 can be understood as a circuit board for switching. It should be noted that the telecommunication connection in this embodiment includes connection through a conductive line or connection through a wireless signal.

[0096] The electrical device may also include a first pressure detection device 70 and a second pressure detection device 80. The first pressure detection device 70 and the second pressure detection device 80 may be connected to the central collector board 101 through lines, and then be connected to the main control board of the outdoor unit of the HVAC equipment through the central collector board 101.

[0097] The electrical device may further include a first pressure switch 30, a second pressure switch 40, a first temperature detection device 50 and a second temperature detection device 60. The above structure may also be connected through a conductive line ( Figure 8 The bold line in the figure) is directly connected to the CIMC board 101, and then is connected to the main control board of the outdoor unit of the HVAC equipment through the CIMC board 101.

[0098] By first connecting the above electrical device to the intermediate assembly plate 101 and then connecting it to the main control board through the intermediate assembly plate 101, compared with the method of directly connecting the above functional devices to the main control board separately, the conductive circuit can be simplified, the internal space of the outdoor unit of the HVAC equipment can be further saved, the production efficiency can be improved, and the production cost can be reduced.

[0099] In this embodiment, the adapter device 100 and the pilot valve 16 are respectively located on opposite sides of the main valve pipe 11. The adapter device 100 may only include one intermediate assembly plate 101, and the intermediate assembly plate 101 is directly mounted on the main valve pipe 11, or the adapter device 100 may be designed to include a mounting base 102 and an intermediate assembly plate 101. The mounting base 102 is mounted on the main valve pipe 11, the mounting base 102 is provided with a receiving groove, and the intermediate assembly plate 101 is mounted in the mounting base 102. The intermediate assembly plate 101 is used to connect to the main control board.

[0100] Furthermore, the adapter device 100 may further include a cover body 103. The cover body 103 is covered on the mounting base 102, and the mounting method may be a detachable and installable method such as snap connection or bolt connection. The mounting base 102 and the cover body 103 form a box structure, and the cavity for mounting the intermediate assembly plate 101 is defined by the cover body 103 and the receiving groove of the mounting base 102. In addition, a wire passing hole needs to be opened on the cover body 103 or the mounting base 102 to facilitate the connection between the above functional devices and the intermediate assembly plate 101.

[0101] Embodiment Five

[0102] Combined with the attached Figure 14 As shown, this embodiment provides an outdoor unit 2000 of HVAC equipment, 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 assembly 1000 as described in any one of the above Embodiment One to Embodiment Three; the four-way valve assembly 1000 is respectively connected and communicated with the compressor 900 and the heat exchanger.

[0103] Specifically, the first pipe joint 12 of the four-way valve assembly 1000 may be connected to the exhaust port of the compressor 900 through an exhaust pipe 200, the second pipe joint 13 may be connected to the suction port of the compressor 900 through a suction pipe 300, the third pipe joint 14 may be connected to the first heat exchanger 600 through a first refrigerant flow path 400, and the fourth pipe joint 15 may be connected to the second heat exchanger 700 of the indoor unit 3000 of the HVAC equipment through a second refrigerant flow path 500.

[0104] The refrigerant within the compressor 900 sequentially passes through the intake pipe 300 and the second pipe joint 13 to enter the main valve pipe 11, then flows into the first refrigerant flow path 400 through the third pipe joint 14. After being processed by structures such as the expansion valve 410 and the 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 within 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, then returns to the main valve pipe 11. Subsequently, it 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.

[0105] Regarding the structure of other parts of the outdoor unit 2000 of the HVAC equipment except for the four-way valve assembly 1000, please refer to the related technology, and this application will not elaborate on it here.

[0106] Embodiment Six

[0107] Combined with the attached Figure 14 As shown, this embodiment provides an HVAC equipment, including the outdoor unit 2000 of the HVAC equipment shown in Embodiment Four. In some embodiments, the HVAC equipment further includes an indoor unit 3000 of the HVAC equipment, and the indoor unit 3000 of the HVAC equipment and the outdoor unit 2000 of the HVAC equipment are connected through pipelines.

[0108] Since the refrigerant cycle has been introduced in Embodiment Five, this embodiment will not elaborate on it. Additionally, regarding the other structures of the indoor unit 3000 of the HVAC equipment, reference can be made to the related technology, and this embodiment will not describe it in detail either.

[0109] As described above, only the preferred specific embodiments of the present utility model are provided. The embodiments can be combined and replaced with each other, but the protection scope of the present utility model is not limited thereto. Any changes or replacements that can be easily thought of 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 assembly, applied to a HVAC device having a compressor and a heat exchanger, characterized in that: include: The valve body comprises a main valve pipe and a first pipe joint, a second pipe joint and a third pipe joint respectively connected to 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, the second pipe joint is used to connect to an intake pipeline, the intake pipeline is used to connect to an air return port of the compressor, and the third pipe joint is used to connect the first refrigerant flow path through the pipeline, so that the first refrigerant pipeline is used to connect to the heat exchanger; The filter device is installed on the third pipe joint and is used for filtering the refrigerant flowing through the third pipe joint.

2. The four-way valve assembly according to claim 1, characterized in that: The filter device is installed at one end of the third pipe joint away from the main valve pipe.

3. The four-way valve assembly according to claim 2, characterized in that: The filter device 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.

4. The four-way valve assembly according to claim 3, 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.

5. The four-way valve assembly according to claim 1, characterized in that: The filter device comprises a second filter element, and the second filter element is installed in the third pipe joint.

6. The four-way valve assembly according to claim 1, characterized in that: The four-way valve assembly also includes a switching device and an electrical device. The switching device is installed on the main valve pipe and is used to electrically connect the electrical device and the main control board of the HVAC equipment.

7. The four-way valve assembly according to claim 6, characterized in that: The adapter device includes a mounting seat and a center plate. The mounting seat is mounted on the main valve pipe. The mounting seat is provided with a receiving groove. The center plate is mounted in the mounting seat. The center plate is used to connect the main control board and the electrical device.

8. The four-way valve assembly according to claim 7, characterized in that: The transfer device further comprises a cover body, which is mounted on the mounting seat and, together with the accommodating groove, forms a cavity for mounting the center plate.

9. The four-way valve assembly according to any one of claims 6 to 8, characterized in that: The electrical device includes a first temperature detection device and a second temperature detection device. The first temperature detection device is installed on the first pipe joint and is used to detect the temperature of the first pipe joint. The second temperature detection device is installed on the second pipe joint and is used to detect the temperature of the second pipe joint. The first temperature detection device and the second temperature detection device are respectively electrically connected to the adapter.

10. The four-way valve assembly according to any one of claims 6 to 8, characterized in that: The electrical device includes a first pressure switch and a second pressure switch, the first pipe joint is provided with a first interface, the second pipe joint is provided with a second interface, the first pressure switch is installed on the first interface and is connected to the first pipe joint through the first interface, the second pressure switch is installed on the second interface and is connected to the second pipe joint through the second interface, and the first pressure switch and the second pressure switch are respectively electrically connected to the adapter.

11. The four-way valve assembly according to any one of claims 6 to 8, characterized in that: The electrical device includes a first pressure detection device and a second pressure detection device, the first pipe joint is provided with a third interface, the second pipe joint is provided with a fourth interface, the first pressure detection device is installed on the third interface and is connected to the first pipe joint through the third interface, the second pressure detection device is installed on the fourth interface and is connected to the second pipe joint through the fourth interface, and the first pressure detection device and the second pressure detection device are respectively electrically connected to the adapter.

12. The four-way valve assembly according to any one of claims 6 to 8, characterized in that: The electrical device includes a third pressure detection device, 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. The third pressure detection device is electrically connected to the adapter.

13. The four-way valve assembly according to claim 12, characterized in that: The third pressure detection device includes a pressure sensing element, a first conductive piece and a second conductive piece. The first pipe joint is provided with a fifth interface, and 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.

14. The four-way valve assembly according to any one of claims 1 to 8, 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 conduction of the one-way valve pipe section from the one-way valve pipe section to the main pipe section.

15. 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 14, 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.

16. A HVAC equipment, characterized in that: It comprises a HVAC equipment indoor unit and a HVAC equipment outdoor unit as claimed in claim 15, wherein the HVAC equipment indoor unit and the HVAC equipment outdoor unit are connected via a pipeline.

Images