Outdoor unit assembly, outdoor unit of heating, ventilation and air conditioning device, and heating, ventilation and air conditioning device

Abstract

The present application relates to the technical field of heating, ventilation and air conditioning devices, and specifically relates to an outdoor unit assembly, an outdoor unit of a heating, ventilation and air conditioning device, and a heating, ventilation and air conditioning device. The outdoor unit assembly is used for a heating, ventilation and air conditioning device, and comprises: a tank body, which is communicated with a compressor discharge port of the heating, ventilation and air conditioning device or a compressor suction port of the heating, ventilation and air conditioning device by means of a refrigerant pipe; and at least one functional component, which is mounted on the tank body and includes at least one of a pressure sensor, a temperature sensor, a pressure switch, and a valve body. By means of the technical solution of the present application, at least one functional component is integrally arranged on a tank body, achieving one or more functions, reducing the volume of the outdoor unit assembly, and reducing the number of pipes used by the outdoor unit assembly, thereby reducing costs and facilitating the vibration resistance of the functional component. The present application also helps to improve the vibration resistance of the functional component, thereby improving the stability and reliability of functional component mounting.

Description

Outdoor unit components, HVAC outdoor units and HVAC equipment

[0001] Cross-references to related applications

[0002] This application claims priority and the rights of the following patent applications, the entire contents of which are incorporated herein by reference:

[0003] A Chinese patent application filed on December 11, 2024 with the China National Intellectual Property Administration, application number 202411829285.X, entitled "Outdoor Unit Components, HVAC Equipment Outdoor Unit and HVAC Equipment". Technical Field

[0004] This application relates to the field of HVAC equipment technology, specifically to an outdoor unit component, an HVAC outdoor unit, and HVAC equipment. Background Technology

[0005] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0006] Currently, the outdoor unit components of HVAC equipment include key refrigeration components and refrigerant piping systems. Among them, there are many types of key refrigeration components, such as compressors, oil separators, gas-liquid separators, various valves and heat exchangers, which are connected by piping. However, connecting these scattered refrigeration components by piping results in problems such as large space occupation and material waste. Summary of the Invention

[0007] The purpose of this application is to at least address the problems of large space occupation and material waste in outdoor unit components of HVAC equipment. This purpose is achieved through the following means:

[0008] The first aspect of this application provides an outdoor unit assembly for HVAC equipment, the outdoor unit assembly comprising: a tank for being connected via a refrigerant pipeline to the compressor exhaust port or the compressor return port of the HVAC equipment; and at least one functional component installed in the tank, the at least one functional component comprising at least one of a temperature sensor, a pressure sensor, a pressure switch, and a valve body.

[0009] According to the outdoor unit assembly provided in this application, by integrating at least one functional component onto the tank, which can be at least one of a temperature sensor, pressure sensor, pressure switch, and valve body, the space occupied and arranged by at least one functional component in the entire outdoor unit assembly can be reduced. This also saves on the external connection piping required for connecting the functional component, reducing the amount of piping used and lowering costs. Simultaneously, it facilitates later maintenance and management and improves the installation efficiency of the entire outdoor unit assembly. Furthermore, it helps improve the seismic resistance of the functional component and enhances the stability and reliability of its installation.

[0010] In addition, the outdoor unit assembly according to this application may also have the following additional technical features:

[0011] In some embodiments of this application, the at least one functional component includes a pressure sensor and / or a temperature sensor, the pressure sensor and / or the temperature sensor being mounted on the outer wall of the tank.

[0012] In some embodiments of this application, the at least one functional component includes a pressure switch, which is mounted on the outer wall of the tank.

[0013] In some embodiments of this application, the tank body is provided with a functional opening, the functional opening is fitted with an adapter, and the connecting pipe of the pressure switch is installed on the adapter; or, the connecting pipe of the pressure sensor is installed on the adapter; or, the connecting pipe of the temperature sensor is installed on the adapter or the sleeve of the temperature sensor is welded to the outer wall of the tank body.

[0014] In some embodiments of this application, the tank is an oil separator, the top wall of the oil separator has an outlet, the side wall of the oil separator has an inlet and at least one functional opening, the inlet is connected to the compressor exhaust port through a refrigerant pipeline, and the outlet outputs refrigerant gas; the at least one functional opening is connected to at least one functional component.

[0015] In some embodiments of this application, multiple functional openings are provided, including a first functional opening and a second functional opening. The first functional opening is provided on the top wall, and the second functional opening is provided on the bottom. The first functional opening communicates with at least one of the functional components, and the second functional opening communicates with the return port of the compressor via a first capillary tube, which is configured as an oil return path.

[0016] In some embodiments of this application, the oil separator further includes a multi-port connector, which includes a main pipe and a plurality of branch pipes connected to the main pipe, the main pipe communicating with one of the functional openings, and at least one of the branch pipes communicating with at least one of the functional components.

[0017] In some embodiments of this application, the at least one functional component includes a first functional component, a first branch pipe among a plurality of branch pipes is connected to the first functional component, the first functional component is a pressure sensor or a temperature sensor, a second branch pipe among a plurality of branch pipes is connected to a first capillary tube, the first capillary tube is connected to the compressor return port, and the first capillary tube is configured as an oil return path.

[0018] In some embodiments of this application, a third branch pipe among multiple branch pipes is connected to a second capillary tube, one end of the second capillary tube is connected to the third branch pipe, and the other end is connected to the compressor return port. The second capillary tube is configured as a pressure relief path. The at least one functional component includes a second functional component, which is an electric valve. The electric valve is disposed between the third branch pipe and the second capillary tube. The electric valve opens or closes the connection between the second capillary tube and the third branch pipe based on the detection value of a pressure sensor or a temperature sensor.

[0019] In some embodiments of this application, multiple functional openings are provided, including a first functional opening and a second functional opening. The first functional opening is provided on the top wall, and the second functional opening is provided on the bottom. The at least one functional component further includes a pressure switch, which is installed in the first functional opening, and the main pipe of the multi-port connector is installed in the second functional opening.

[0020] In some embodiments of this application, the tank is an oil separator, which has an air inlet, an air outlet, and at least one functional opening. The air inlet is connected to an air inlet pipe, which is connected to the compressor exhaust port via a refrigerant line. The at least one functional opening includes an oil return port, which is connected to the compressor air return port via a first capillary tube. The first capillary tube is configured as an oil return path. The at least one functional component includes a valve body, which further includes a one-way valve. The one-way valve is located downstream of the air outlet and is configured to allow unidirectional flow from the inside of the oil separator to the outside.

[0021] In some embodiments of this application, the oil separator includes an outlet pipe, one end of which is connected to the inner cavity of the oil separator, and the other end is connected to the one-way valve.

[0022] In some embodiments of this application, the one-way valve includes: a mounting base, which is mounted on the top wall of the oil separator, and the mounting base has a first opening and a second opening communicating with the first opening on opposite sides, the first opening communicating with the oil separator; a valve seat, which is mounted on the side of the mounting base away from the oil separator, the valve seat having a valve cavity, and at least one through hole communicating with the valve cavity on the periphery of the valve seat; and a stop plate, which is movably disposed in the valve cavity; wherein the mounting base is partially located in the valve cavity and forms a first stop surface, and the top surface of the valve cavity forms a second stop surface, the first stop surface and the second stop surface being used to abut against the stop plate respectively.

[0023] In some embodiments of this application, the tank is a gas-liquid separator, which is connected to the compressor return port via a refrigerant pipeline.

[0024] In some embodiments of this application, at least one of the functional components includes a pressure sensor, which is mounted on the outer wall of the gas-liquid separator.

[0025] A second aspect of this application discloses a heating and ventilation outdoor unit, comprising: a housing having a support base; a compressor, an outdoor heat exchanger, an oil separator, a gas-liquid separator, a first shut-off valve, and a second shut-off valve supported on the support base; a refrigerant pipeline connecting the compressor exhaust port and the oil separator, and connecting the gas-liquid separator and the compressor return port; a four-way valve having a first interface, a second interface, a third interface, and a fourth interface, the first interface being connected to the oil separator via a refrigerant pipeline, the second interface being connected to the gas-liquid separator via a refrigerant pipeline, the third interface being connected to the gas-side connection pipe of the outdoor heat exchanger via a refrigerant pipeline, the liquid-side connection pipe of the outdoor heat exchanger being connected to the first shut-off valve via a refrigerant pipeline, and the fourth interface being connected to the second shut-off valve via a refrigerant pipeline, wherein the four-way valve is configured such that the first interface is switchably connected to one of the third interface and the fourth interface, and the second interface is switchably connected to the other of the third interface and the fourth interface.

[0026] The third aspect of this application provides a heating, ventilation, and air conditioning (HVAC) device, including an indoor HVAC unit and an outdoor HVAC unit as described in the second aspect embodiment, wherein the indoor HVAC unit is connected to a first shut-off valve and a second shut-off valve of the outdoor HVAC unit via a liquid-side connecting pipe and a gas-side connecting pipe, respectively.

[0027] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0028] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0029] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. Wherein:

[0030] Figure 1 is a system schematic diagram of the refrigeration process of a heating, ventilation and air conditioning (HVAC) device according to an embodiment of this application;

[0031] Figure 2 is a system schematic diagram of the heating process of a heating and ventilation equipment according to an embodiment of this application;

[0032] Figure 3 is a system schematic diagram of a heating, ventilation and air conditioning (HVAC) device according to another embodiment of this application;

[0033] Figure 4 is a partial structural diagram of an outdoor unit component of a heating, ventilation and air conditioning system according to an embodiment of this application;

[0034] Figure 5 is a schematic diagram of the structure of an oil separator according to some embodiments of this application;

[0035] Figure 6 is a schematic diagram of another part of the outdoor unit component of the HVAC equipment proposed in an embodiment of this application;

[0036] Figure 7 is a schematic diagram of the structure of a functional connector proposed in some embodiments of this application;

[0037] Figure 8 is a partial structural schematic diagram of the outdoor unit component of a heating, ventilation and air conditioning system according to another embodiment of this application;

[0038] Figure 9 is a cross-sectional structural schematic diagram of a one-way valve according to an embodiment of this application;

[0039] Figure 10 is a schematic diagram of another oil separator proposed in some embodiments of this application;

[0040] Figure 11 is a schematic diagram of the assembly structure when there are two oil separators according to some embodiments of this application.

[0041] In Figures 1 and 2, the arrows indicate the direction of refrigerant flow.

[0042] The labels in the attached diagram represent the following: 10, HVAC outdoor unit; 100, casing; 110, support base; 200, four-way valve; 201, first interface; 202, second interface; 203, third interface; 204, fourth interface; 300, oil separator; 301, air outlet; 302, air inlet; 303, functional opening; 303.1, first functional opening; 303.2, second functional opening; 310, air outlet pipe; 320, air inlet pipe; 330, multi-way connector; 331, main pipe; 332, first branch pipe; 333, second branch pipe; 334, third branch pipe; 340, adapter connector; 400, gas-liquid separator; 401, first gas-liquid separator inlet; 402, gas-liquid separator outlet; 410, top wall of gas-liquid separator; 500, compressor; 600. Outdoor heat exchanger; 610. Outdoor fan; 70. Functional component; 701. Check valve; 7011. Mounting base; 7012. Valve seat; 7013. Stop plate; 7014. Through hole; 7015. First stop surface; 7016. Second stop surface; 702. Pressure switch; 703. Electronic expansion valve; 704. Pressure sensor (high pressure sensor); 705. Pressure sensor (low pressure sensor); 706. Electric valve; 707. First pressure relief valve; 708. Second pressure relief valve; 709. Temperature sensor; 710. Adapter circuit board; 711. First shut-off valve; 712. Second shut-off valve; 810. First refrigerant pipe; 811. Main refrigerant pipe; 812. Branch refrigerant pipe; 813. T-joint; 820. Second refrigerant pipe; 821. First capillary tube; 822. Second capillary tube; 823. Make-up gas pipe; 824. Bypass pipe; 830. Third refrigerant pipe; 840. Second refrigerant pipe; 20. Indoor HVAC unit; 21. Indoor heat exchanger; 22. Indoor fan. Detailed Implementation

[0043] Exemplary embodiments of this application will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of this application are shown in the drawings, it should be understood that this application may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of this application and to fully convey the scope of this application to those skilled in the art.

[0044] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also include the plural forms. The terms “comprising,” “including,” “containing,” and “having” are inclusive and therefore indicate the presence of the stated features, steps, operations, elements, and / or components, but do not exclude 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 construed as requiring them to be performed in a particular order described or illustrated unless the order of performance is explicitly indicated. It should also be understood that additional or alternative steps may be used.

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

[0046] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "inside," "outside," "middle," "outer," "below," "below," "above," "over," etc. Such spatial relative terms are intended to include different orientations of the device in use or operation, other than those depicted in the figure. For example, if the device in the figure is flipped, an element described as "below other elements or features" or "below other elements or features" would 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 may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0047] This application provides a heating, ventilation, and air conditioning (HVAC) system, which is used for cooling or heating. The HVAC system includes an indoor unit 20 and an outdoor unit 10. The indoor unit 20 is typically installed indoors, and the outdoor unit 10 is typically installed outdoors. The indoor and outdoor units 20 are connected by refrigerant piping to form a refrigerant circulation loop, thereby achieving the functions of cooling, heating, dehumidification, and air purification to achieve comfortable air quality.

[0048] There may be one or more HVAC outdoor units 10, which are typically installed outdoors. The outdoor units 10 provide the refrigerant source for the refrigerant circulation to the indoor units 20. There may also be one or more indoor units 20, each equipped with one or more air outlets to discharge cooled, heated, dehumidified, or purified air into the room. The indoor units 20 typically include an indoor heat exchanger 21, and the outdoor units 10 typically include an outdoor heat exchanger 600.

[0049] The HVAC outdoor unit 10 includes a housing 100, which houses and supports a compressor 500, a four-way valve 200, an oil separator 300, a gas-liquid separator 400, an outdoor heat exchanger 600, an outdoor fan 610, a first shut-off valve 711, a second shut-off valve 712, and an outdoor electronic expansion valve 703. These components are interconnected via refrigerant pipes to form an outdoor-side refrigerant circulation loop. The HVAC outdoor unit further includes an outdoor unit electrical control module 620 housed within the housing 100. The outdoor unit electrical control module 620 is electrically connected to the compressor 500, the four-way valve 200, the outdoor fan 610, and the outdoor electronic expansion valve 703, thereby controlling the operating status of the electrical components of the HVAC outdoor unit.

[0050] The indoor unit 20 also includes an indoor casing, with the air outlet located in the indoor casing. The indoor casing houses and supports the indoor fan, indoor heat exchanger, indoor electronic expansion valve, and indoor electrical control module. The indoor heat exchanger and indoor electronic expansion valve are connected to each other via refrigerant pipes to form an indoor side loop of the refrigerant circulation loop.

[0051] The indoor and outdoor circuits are connected by gas and liquid connection pipes to form a refrigerant circulation loop.

[0052] Please refer to Figure 1. The arrows in Figure 1 indicate the flow direction of refrigerant in the refrigerant circulation loop during cooling mode. During the cooling process, the four-way valve 200 switches to cooling mode, meaning the first port 201 connects to the third port 203, and the second port 202 connects to the fourth port 204. The outdoor heat exchanger 600 acts as a condenser. The compressor 500 discharges high-temperature, high-pressure refrigerant, which undergoes gas-oil separation via the oil separator 300. The gaseous refrigerant flows from the oil separator outlet to the four-way valve 200, and then through the four-way valve 200 to the outdoor heat exchanger 600, which acts as a condenser. The outdoor fan 610 drives air to flow through the condenser, where heat exchange occurs between the condenser and the air flowing through it. High-temperature, high-pressure gas condenses into liquid. The cooled liquid refrigerant flows out of the outdoor unit through the first shut-off valve 711 and flows to the indoor unit 20 via the liquid connection pipe. The indoor heat exchanger 21 inside the indoor unit is an evaporator. After the liquid refrigerant is depressurized by the indoor electronic expansion valve, it flows into the indoor heat exchanger (evaporator). The liquid refrigerant in the evaporator absorbs heat and changes from liquid to gas. During the process of refrigerant evaporation and heat absorption, the evaporator exchanges heat with the indoor air flowing through it, carrying away the heat from the air in the indoor unit 20. As a result, the air discharged from the indoor unit 20 is cooled and releases heat. The indoor unit 20 blows cold air, thus achieving the cooling process. The refrigerant gas flowing from the indoor unit 20 returns to the outdoor unit 10 via the gas connection pipe. It then enters the outdoor unit through the second shut-off valve 712, passes through the fourth port 204 and the second port 202 of the four-way valve 200, and flows to the gas-liquid separator 400. In the gas-liquid separator, the refrigerant gas undergoes further gas-liquid separation. The separated refrigerant gas then flows back to the return port of the compressor 500 via the refrigerant pipe.

[0053] Please refer to Figure 2. The arrows in Figure 2 indicate the refrigerant flow direction in the refrigerant circulation loop during heating mode. During the heating process, the four-way valve 200 switches to heating mode, meaning the first port 201 connects to the fourth port 204, and the second port 202 connects to the third port 203. The indoor heat exchanger 21 acts as a condenser. The compressor 500 discharges high-temperature, high-pressure refrigerant, which undergoes gas-oil separation via the oil separator 300. The gaseous refrigerant flows from the oil separator outlet to the four-way valve 200, then through the four-way valve 200 and the second shut-off valve 712 out of the outdoor unit. It then flows through the gas connection pipe to the indoor heat exchanger 21, which acts as a condenser. The indoor fan 22 drives indoor air to flow through the indoor heat exchanger 21, where the high-temperature gaseous refrigerant exchanges heat with the indoor air, causing the air in the indoor unit 20 to carry away the high-temperature gaseous refrigerant. Heat is carried away and discharged from the indoor unit 20 to the room outside the indoor unit 20, causing the indoor unit 20 to blow hot air, thus realizing the heating process. The high-temperature gaseous refrigerant exchanges heat with the indoor heat exchanger and becomes liquid refrigerant. After the liquid refrigerant flows out of the indoor unit 20, it flows to the outdoor unit 10 through the liquid connection pipe and enters the outdoor heat exchanger 600 of the outdoor unit 10 through the first shut-off valve 711. The outdoor heat exchanger 600 is an evaporator. The outdoor fan 610 drives the air to flow through the evaporator. The liquid refrigerant absorbs heat from the air and evaporates into gaseous refrigerant. The gaseous refrigerant flows to the gas-liquid separator 400 through the third port 203 and the second port 202 of the four-way valve. The gaseous refrigerant is further separated into gas and liquid in the gas-liquid separator. The separated gaseous refrigerant flows back to the return port of the compressor 500 through the refrigerant pipe.

[0054] Referring to Figures 1 to 4, according to some embodiments of this application, this application proposes an outdoor unit assembly for HVAC equipment. The outdoor unit assembly includes: a tank and at least one functional component 70. The tank is connected via a refrigerant pipeline to the compressor exhaust port or compressor return port of the HVAC equipment 10. At least one functional component 70 is installed in the tank and includes at least one of a temperature sensor, a pressure sensor, a pressure switch 702, and a valve body.

[0055] Specifically, when the tank is connected to the compressor exhaust port, the tank can be an oil separator 300. When the tank is connected to the compressor return port, the tank can be a gas-liquid separator 400.

[0056] For example, the valve body can be at least one of an electric valve 706 and a check valve 701.

[0057] The outdoor unit assembly provided in the first aspect of this application integrates at least one functional component 70 onto the tank. This at least one functional component 70 can be at least one of a temperature sensor 709, a pressure sensor (high-pressure sensor) 704, a pressure switch 702, and a valve body. This reduces the space occupied and arranged by the at least one functional component 70 in the entire outdoor unit assembly, saves on external connection piping required for connecting the functional component 70, reduces the amount of piping used, lowers costs, facilitates later maintenance and management, and improves the installation efficiency of the entire outdoor unit assembly. Furthermore, by integrating at least one functional component 70 into the tank, compared to installing the functional component 70 on refrigerant pipes, the tank's vibration resistance is relatively higher than that of the refrigerant pipes. Therefore, installing the functional component 70 on the tank reduces the impact of vibration on the functional component 70, thereby improving the safety and reliability of the functional component.

[0058] According to some embodiments of this application, at least one functional component includes a pressure sensor 704 and / or a temperature sensor, which are mounted on the outer wall of the oil separator 300. The oil separator is connected to the exhaust port of the compressor 500 via a refrigerant line.

[0059] Pressure sensor 704 is used to detect the discharge pressure at the compressor discharge port. Specifically, pressure sensor 704 is a high-pressure sensor.

[0060] The temperature sensor is used to detect the exhaust temperature at the compressor's discharge port and is defined as a high-temperature sensor.

[0061] By integrating at least one of the pressure sensor 704 and the temperature sensor onto the outer wall of the oil separator 300, the discharge pressure of the compressor 500 can be detected in real time by the pressure sensor 704, or the discharge temperature of the compressor 500 can be detected by the temperature sensor, so as to determine the operating condition of the compressor 500 based on the discharge pressure or discharge temperature.

[0062] According to some embodiments of this application, at least one functional component includes a pressure switch 702, which is mounted on the outer wall of the oil separator 300 and is a high-pressure switch.

[0063] Since the oil separator 300 is connected to the compressor discharge port via a refrigerant pipe, the pressure inside the oil separator 300 can be considered as the discharge pressure of the compressor 500, and the temperature inside the oil separator 300 can be considered as the discharge temperature of the compressor 500. The pressure switch 702 installed in the oil separator 300 has a preset pressure safety threshold. When the discharge pressure of the compressor 500 exceeds the preset safety threshold, the compressor 500 stops operating. The pressure sensor 704 installed in the oil separator 300 can detect the discharge pressure of the compressor 500, and the high-temperature sensor installed in the oil separator 300 can detect the discharge temperature of the compressor. The outdoor unit control module 620 determines the operating condition of the compressor 500 based on the detected discharge pressure or discharge temperature, and controls the pressure switch 702 to perform outdoor unit performance regulation control based on the discharge pressure and / or discharge temperature. The control method includes: when the discharge pressure exceeds the preset threshold, the high-pressure side flow path of the outdoor unit is depressurized, and the depressurized flow path is directed to the low-pressure side flow path of the outdoor unit. The high-pressure side flow path of the outdoor unit includes the refrigerant flow path from the compressor discharge port to the four-way valve 200. Specifically, the high-pressure side flow path consists of: a first refrigerant pipe 810 between the oil separator 300 and the four-way valve 200, the oil separator 300, and a third refrigerant pipe 830 connecting the compressor 500 discharge port and the oil separator 300. The low-pressure side flow path of the outdoor unit includes the refrigerant flow path from the compressor return port to the gas-liquid separator 400. Specifically, the low-pressure side flow path consists of: a second refrigerant pipe 820 between the gas-liquid separator 400 and the four-way valve 200, the gas-liquid separator 400, and a fourth refrigerant pipe 840 between the gas-liquid separator 400 and the compressor 500 return port.

[0064] According to some embodiments of this application, at least one functional component includes a pressure sensor 705 and / or a temperature sensor, which are mounted on the outer wall of the gas-liquid separator 400. The gas-liquid separator 400 is connected to the return port of the compressor 500 via a refrigerant pipeline.

[0065] Pressure sensor 705 is used to detect the return gas pressure at the compressor return port. Specifically, pressure sensor 705 is a low-pressure sensor.

[0066] The temperature sensor is used to detect the return gas temperature at the compressor's return port and is defined as a low-temperature sensor.

[0067] By integrating at least one of the pressure sensor 705 and the temperature sensor onto the outer wall of the gas-liquid separator 400, the return gas pressure of the compressor 500 can be detected in real time by the pressure sensor 705, or the return gas temperature of the compressor 500 can be detected by the temperature sensor, so as to determine the operating condition of the compressor 500 based on the return gas pressure or the return gas temperature.

[0068] According to some embodiments of this application, at least one functional component includes a pressure switch 702, which is mounted on the outer wall of the gas-liquid separator 400 and is a low-pressure switch.

[0069] In this application, high temperature and low temperature are defined based on exhaust temperature and return gas temperature (exhaust temperature is greater than return gas temperature), and high pressure and low pressure are also defined based on exhaust pressure and return gas pressure (exhaust pressure is greater than return gas pressure), and are not numerical within a specific range.

[0070] Installation of functional components

[0071] According to some embodiments of this application, the functional component 70 has a tube (such as a tube for a pressure switch, a tube for a pressure sensor, a tube for a valve body, and a tube for a temperature sensor), and the wall of the tank is provided with a functional opening 303, which communicates with the space inside the tank, and the tube of the functional component communicates with the functional opening 303.

[0072] The installation methods for the cannula of functional component 70 are as follows:

[0073] In some embodiments, the component can be directly inserted into the functional opening, such as an opening located on the top wall of the tank, with the tube of the functional component inserted into the functional opening from top to bottom.

[0074] In other embodiments, the connection can also be made via an adapter 340. For example, if the tank body is made of steel, and the tube of the functional component is made of a different material, such as copper or aluminum, the adapter is made of the same material as the tube of the functional component. The adapter is first furnace welded to the tank body, and the welding of the tube of the functional component to the adapter can be done using flame welding. This facilitates welding operations in the workshop and makes it easier to disassemble and replace the functional component later. For example, if the functional opening is located on the side wall of the tank body, the adapter is in an "L" shape. One end of the adapter 340 is connected to the functional opening, and the other end is for the tube of the functional component to be inserted. The tube of the functional component is connected to the inside of the tank body through this adapter. By setting the "L" shaped adapter, the lever arm from the functional component to the functional opening is reduced, which helps to reduce the probability of breakage of the tube of the functional component and increases reliability.

[0075] Compared to existing technologies where plug-in functional components are installed on refrigerant pipes, functional components installed on tanks experience relatively lower vibration energy through their plugs, making them less prone to breakage and increasing the reliability of the functional components.

[0076] According to some embodiments of this application, the functional component is welded to the side wall of the tank. When the functional component is a sleeve-type temperature sensor, the functional component is welded to the side wall of the tank. Compared with the prior art where the sleeve of the temperature sensor is welded to the refrigerant pipe, the sleeve of the temperature sensor in this embodiment is welded to the outer peripheral wall of the tank. The welding effect is relatively stable, and it is not easy to detach due to frequent vibration. It also reduces the wear of the sleeve on the refrigerant pipe and increases the reliability of the refrigerant pipe and the temperature sensor.

[0077] Oil separator

[0078] Please refer to Figures 1, 2, 5, and 6. According to some embodiments of this application, the tank is an oil separator 300. The oil separator includes a side wall forming a hollow cylindrical shape, a top wall covering the upper opening of the hollow cylindrical shape, and a bottom wall covering the lower opening of the hollow cylindrical shape. The top wall of the oil separator 300 has an outlet 301, and the side wall of the oil separator 300 has an inlet 302 and an oil return port. The inlet 302 is provided with an inlet pipe, which is connected to the exhaust port of the compressor 500 through a refrigerant pipeline. The outlet pipe 310 outputs high-temperature and high-pressure refrigerant gas. The oil return port is connected to the compressor's return port through a first capillary tube 821. In some embodiments of the application, one end of the first capillary tube 821 is connected to the oil return port, and the other end of the first capillary tube 821 is connected to the low-pressure side flow path of the outdoor unit, and then connected to the compressor 500's return port. The oil separator 300 is also provided with at least one functional opening 303, which connects to at least one functional component, including at least one of a temperature sensor, a pressure sensor, a pressure switch, and a valve body.

[0079] The air outlet 301 is located on the top wall of the oil separator 300 to facilitate the output of the refrigerant gas separated by the oil separator 300. The air inlet 302 is located on the side wall of the oil separator 300. The oil separator 300 is also provided with at least one functional opening. The at least one functional opening can be located on the top wall and / or bottom wall and / or side wall. The at least one functional opening 303 is connected to at least one functional component so that the at least one functional component can realize the detection function of temperature, pressure and other parameters inside the oil separator 300.

[0080] Please refer to Figures 6 and 7. According to some embodiments of this application, the oil separator 300 also includes a multi-port connector 330, which includes a main pipe 331 and a plurality of branch pipes connected to the main pipe 331. The main pipe 331 is connected to a functional opening 303, and at least one of the plurality of branch pipes is connected to at least one functional component.

[0081] By creating a functional opening in the side wall of the oil separator 300, which connects to the main pipe 331 of the multi-port connector 330 (which functions as an adapter 340), and constructing an "L" shape, multiple branch pipes 332 connect to the functional opening 340 via the main pipe 331, thus achieving communication with the interior of the oil separator 300. Furthermore, by connecting at least one functional component to at least one branch pipe 332, each branch pipe 332 can perform different functions, such as pressure detection, temperature detection, and control of return oil flow, thereby improving the integration of the oil separator 300 and increasing the installation efficiency of the entire outdoor unit assembly.

[0082] Please refer to Figures 6 and 7. According to some embodiments of this application, at least one functional component includes a first functional component. The first branch pipe 332 of the plurality of branch pipes 332 is connected to the first functional component. The first functional component is a pressure sensor 704 or a tube-type temperature sensor 709. The second branch pipe 333 of the plurality of branch pipes 332 is connected to a first capillary tube 821. The first capillary tube 821 is connected to the return port of the compressor 500. The first capillary tube 821 is configured as an oil return path. Furthermore, one end of the first capillary tube is directly connected to the second branch pipe 333, or one end of the first capillary tube 821 is connected to the second branch pipe 333 through a functional component, which is an electric valve 706. The electric valve 706 has an open and closed state to control the opening and closing of the oil return path. The other end of the first capillary tube 821 is connected to the low-pressure side flow path of the outdoor unit, that is, the other end of the first capillary tube 821 is connected to the second refrigerant pipe 820, or the gas-liquid separator 400, or the fourth refrigerant pipe 840, thereby realizing the connection between the first capillary tube and the return port of the compressor 500.

[0083] By connecting a pressure sensor 704 or a tube temperature sensor 709 to the first branch pipe 332, the pressure or temperature within the oil separator 300 can be detected by the pressure sensor 704 or temperature sensor. Based on the detected pressure or temperature, the system can be determined to maintain normal operation or be shut down for maintenance. The second branch pipe 333, connected to a first capillary tube 821, allows the lubricating oil separated in the oil separator 300 to flow back to the compressor 500 through a functional opening. It can be understood that this functional opening can be used in place of a return oil port.

[0084] According to some embodiments of this application, the third branch pipe 334 of the plurality of branch pipes 332 is connected to the second capillary pipe 822. One end of the second capillary pipe 822 is connected to the third branch pipe 334, and the other end is connected to the return port of the compressor 500. The second capillary pipe 822 is configured as a pressure relief path. Specifically, at least one functional component includes a second functional component, which is an electric valve. The electric valve 706 is disposed between the third branch pipe 334 and the second capillary pipe 822. The electric valve 706 opens or closes the connection between the second capillary pipe 822 and the third branch pipe 334 according to the detection value of the pressure sensor 704 or the temperature sensor 709.

[0085] By setting a second capillary tube 822 connected to the third branch pipe 334, and setting an electric valve 706 between the third branch pipe 334 and the second capillary tube 822, the electric valve 706 can open or close the connection path between the second capillary tube 822 and the third branch pipe 334 according to the value detected by the pressure sensor or temperature sensor, so as to realize the pressure relief of the compressor and improve the stability of the compressor operation.

[0086] According to some embodiments of this application, the number of functional openings is one. Referring to Figure 5, a functional opening is provided on the side wall of the oil separator. This functional opening is connected to a functional component via an adapter 340. This functional component can be a pressure switch 702 to prevent excessive pressure; a pressure sensor 704 to detect the compressor discharge pressure; a temperature sensor 709 to detect the compressor discharge temperature; or an electric valve 706. One valve connector of the electric valve is connected to the adapter 340, and the other valve connector is connected to a capillary tube (second capillary tube 822). The capillary tube (second capillary tube 822) is connected to the low-pressure side flow path of the outdoor unit. The electric valve 706 can be regarded as a pressure relief valve, and the capillary tube is the pressure relief path. The functional opening 303 can be provided on the side wall or the top wall, as long as it can connect to the internal space of the oil separator 300.

[0087] According to some embodiments of this application, there is one functional opening located at the bottom of the oil separator (see Figures 6 and 7). This functional opening connects to the multi-port connector described above in Figure 7, which has multiple branch pipes connecting to multiple functional components, achieving multi-functional integration. The functional opening is positioned below the oil level so that the lubricating oil separated by the oil separator 300 can flow from the functional opening to the first capillary tube, achieving an oil return function.

[0088] According to some embodiments of this application, please refer to Figures 10 and 11. Multiple functional openings are provided, including a first functional opening 303.1 and a second functional opening 303.2. The first functional opening 303.1 is located at the top (top and top wall of the side wall), and the second functional opening 303.2 is located at the bottom (bottom and bottom wall of the side wall). The first functional opening 303.1 communicates with at least one functional component, and the second functional opening 303.2 is connected to the return port of the compressor 500 via a first capillary tube 821. The first capillary tube 821 is configured as an oil return path.

[0089] For example, the first functional opening 303.1 is provided with a functional component, which may be a pressure sensor 704 or a temperature sensor, thereby enabling functions such as detecting the discharge pressure and temperature of the oil separator 300 or the compressor 500; or it may be a pressure switch 702 to prevent the discharge pressure of the compressor 500 from being too high.

[0090] For example, the first functional opening 303.1 is connected to at least two of the pressure switch 702, pressure sensor 706, and temperature sensor 709 through a plurality of branch pipes of the multi-port connector 330.

[0091] For example, the first functional opening 303.1 is provided with two branch pipes 332 / 334 through a multi-port connector 330 to connect the pressure switch 702 and the pressure sensor 706. The temperature sensor is a sleeve type and is welded to the outer peripheral wall of the oil separator 300.

[0092] For example, the second functional opening 303.2 is located at the bottom and can be regarded as an oil return port. The lubricating oil separated by the oil separator 300 can flow back into the compressor 500 through the second functional opening 303.2 and the first capillary tube 821, which helps to improve the stability of the compressor 500 operation and ensure the efficient and safe operation of the system.

[0093] According to some embodiments of this application, please refer to Figures 10 and 11. Multiple functional openings are provided, including a first functional opening 303.1 and a second functional opening 303.2. The first functional opening 303.1 is located at the top, and the second functional opening 303.2 is located at the bottom. At least one functional component also includes a pressure switch 702, which is installed in the first functional opening 303.1. The main pipe 331 of the multi-port connector 330 is installed in the second functional opening 303.2. The first branch pipe 332 of the multi-port connector 330 is connected to a pressure sensor 704 or a temperature sensor 709. The second branch pipe 333 is connected to a first capillary tube 821. The second branch pipe 334 is connected to the second capillary tube 822 via an electric valve 706 as a pressure relief valve.

[0094] The top wall of the oil separator 300 has a first functional opening 303.1, on which a pressure switch 702 is installed. The first functional opening 303.1 is connected to the interior of the oil separator 300. The oil separator 300 is connected to the compressor discharge port via a refrigerant pipeline. The pressure switch 702 can stop the compressor 500 from running if the discharge pressure of the compressor 500 exceeds a preset threshold. The main pipe of the multi-port connector 330 is installed in the second functional opening 303.2 located at the bottom of the oil separator 300, allowing functional components such as temperature sensors or pressure sensors to communicate with the interior of the oil separator 300 through the multi-port connector 330, thereby enabling the detection of pressure or temperature in the oil separator 300 or the compressor 500.

[0095] Please refer to Figures 1, 2, and 5. According to some embodiments of this application, the tank is an oil separator 300. The oil separator 300 has an air inlet 302, an air outlet 301, and at least one functional opening. An air inlet pipe 320 is inserted into the air inlet 302. The air inlet pipe 320 is connected to the exhaust port of the compressor 500 via a third refrigerant pipe 830. The at least one functional opening includes an oil return port. The oil return port is connected to the air return port of the compressor 500 via a first capillary tube 821. The first capillary tube 821 is configured as an oil return path. After the refrigerant and lubricating oil mixture discharged from the compressor 500 flows into the oil separator 300, the oil separator 300 separates the refrigerant and lubricating oil. The separated refrigerant is output through the air outlet 301, and the lubricating oil can flow back into the compressor 500 through the first capillary tube 821, which helps to improve the stability of the compressor 500 operation and ensure the efficient and safe operation of the system. At least one functional component includes a valve body, which further includes a one-way valve 701 located downstream of the outlet 301 and configured to allow one-way flow from the inside of the oil separator 300 to the outside.

[0096] For example, please refer to Figure 5. The air outlet 301 is provided with an air outlet pipe 310. One end of the air outlet pipe 310 extends into the oil separator 300 and the other end is exposed outside the oil separator 300. The one-way valve 701 is located downstream of the air outlet pipe 310. Specifically, the one-way valve 701 includes a main pipe and a one-way valve core disposed in the middle of the main pipe. One end of the main pipe is connected to the downstream end of the air outlet pipe, and the other end of the main pipe is connected to the upstream end of the first refrigerant pipe 810. One end of the outlet pipe 310 is connected to the oil separator 300. After the oil separator 300 separates the refrigerant and lubricating oil mixture flowing into the compressor 500, the separated refrigerant gas can be discharged through the outlet pipe 310. The other end of the outlet pipe 310 is connected to the one-way valve 710, so that the refrigerant gas can only be discharged from the inner cavity of the oil separator 300 to the outside through the one-way valve 710, and cannot flow back into the oil separator 300, which helps to reduce the service life of the oil separator 300 and the compressor 500.

[0097] For example, please refer to FIG9. According to some embodiments of this application, the one-way valve 701 includes: a mounting base 7011, a valve seat 7012, and a stop plate 7013. The mounting base 7011 is mounted on the top wall of the oil separator 300. The mounting base 7011 has a first opening on each of its opposite sides and a second opening communicating with the first opening. The first opening is connected to the oil separator 300. The valve seat 7012 is mounted on the side of the mounting base 7011 facing away from the oil separator 300. The valve seat 7012 has a valve cavity, and at least one through hole 7014 communicating with the valve cavity is provided on the periphery of the valve seat 7012. The stop plate 7013 is movably disposed within the valve cavity. The mounting base 7011 is partially located within the valve cavity and forms a first stop surface 7015. A second stop surface 7016 is formed on the top surface of the valve cavity. The first stop surface 7015 and the second stop surface 7016 are respectively used to abut against the stop plate 7013. A portion of the vent pipe 310 is installed on the lower side of the mounting base 7011 and located inside the oil separator, and a portion of the vent pipe 310 is installed on the upper side of the mounting base 7011, with the valve seat 7012 disposed inside the upper vent pipe 310. The upstream end of the upper vent pipe is connected to the downstream end of the first refrigerant pipe 810.

[0098] Understandably, when the oil separator 300 discharges the separated refrigerant gas, the internal pressure of the oil separator 300 is greater than the external pressure. The stop plate 7013 can move with the refrigerant towards the top of the valve chamber and abut against the second stop surface 7016 at the top of the valve chamber, allowing the refrigerant to enter the valve chamber from the first opening of the mounting base 7011 and discharge into the refrigerant pipeline through at least one through hole 7014 connected to the valve chamber. When the compressor is in standby mode, the oil separator 300 does not discharge refrigerant. At this time, the stop plate 7013 abuts against the first stop surface 7015 at the top of the mounting base 7011 to seal the second opening of the mounting base 7011, thereby reducing the risk of refrigerant backflow into the oil separator 300 and thus improving the service life of the oil separator 300 and the compressor.

[0099] Referring to Figures 1 and 2, according to some embodiments of this application, the tank is a gas-liquid separator 400, which is connected to the second port 202 of the four-way valve 200 via a second refrigerant pipe 820, and connected to the return port of the compressor 500 via a fourth refrigerant pipe 840.

[0100] The gas-liquid separator 400 can be provided with a functional opening, and the main pipe 331 of the multi-port connector 330 in Figure 7 is connected to the functional opening. The number of multiple branch pipes is at least two, which are integrated to connect at least two of the following: low pressure sensor 705, pressure switch 702 (low pressure switch), insert-type temperature sensor 709, and electric valve 706.

[0101] The gas-liquid separator 400 can be equipped with multiple functional openings, each of which is connected to a functional component.

[0102] The gas-liquid separator 400 can be provided with multiple functional openings, one of which connects to a functional component, and another functional opening connects to at least two functional components via a multi-port connector.

[0103] Specifically, the gas-liquid separator 400 has a gas-liquid separation inlet 401 connected to the downstream end of the second refrigerant pipe 820, the gas-liquid separation inlet 401 is located on the top wall 410 of the gas-liquid separator, and the gas-liquid separator 400 has a gas-liquid separation outlet 402 connected to the upstream end of the fourth refrigerant pipe 840.

[0104] In some embodiments, at least one functional component includes a pressure sensor mounted on the outer wall of the gas-liquid separator 400. This pressure sensor is used to detect the return gas pressure at the compressor return port.

[0105] In some embodiments, the low-pressure sensor 705 may also be disposed on the second refrigerant pipe 820 or on the fourth refrigerant pipe 840. The low-pressure sensor 705 is used to detect the pressure of the second refrigerant pipe 820, which is the pressure of the low-pressure side of the compressor 500 (i.e., the low-pressure side of the system).

[0106] According to some embodiments of this application, this application also proposes a heating and ventilation outdoor unit 10, including: a housing 100, a four-way valve 200, and an outdoor unit assembly as described in any of the first aspect embodiments. The housing 100 has a support base 110, on which a compressor 500, an outdoor heat exchanger 600, an oil separator 300, a gas-liquid separator 400, a first shut-off valve 711, and a second shut-off valve 712 are supported; a refrigerant pipeline connects the exhaust port of the compressor 500 and the oil separator 300, and connects the gas-liquid separator 400 and the return port of the compressor 500; the four-way valve 200 has a first port 201, a second port 202, a third port 203, and a fourth port 204, the first port 201 being connected to the oil separator 300 via a refrigerant pipeline, the second port 203 being connected to the oil separator 300 via a refrigerant pipeline, the fourth port 204 being connected to the oil separator 300 via a refrigerant pipeline, the fourth port 202 being connected to the oil separator 300 via a refrigerant pipeline, the fifth port 203 being connected to the oil separator 300 via a refrigerant pipeline, the sixth port 202 being connected to the oil separator 300 via a refrigerant pipeline, the seventh port 202 being connected to the oil separator 300 via a refrigerant pipeline, the fifth port 202 being connected to the oil separator 300 via a refrigerant pipeline, the sixth port 202 being connected to the oil separator 300 via a refrigerant pipeline, the seventh port 202 being connected to the oil separator 300 via a refrigerant pipeline, the sixth port 202 being connected to the oil separator 300 via a refrigerant pipeline, the seventh port 202 is connected to the gas-liquid separator 400 via a refrigerant line. The third port 203 is connected to the gas-side connection pipe of the outdoor heat exchanger 600 via a refrigerant line. The liquid-side connection pipe of the outdoor heat exchanger 21 is connected to the first shut-off valve 711 via a refrigerant line. The fourth port 204 is connected to the second shut-off valve 712 via a refrigerant line. The four-way valve 200 is configured such that the first port 201 can be switched to be connected to one of the third port 203 and the fourth port 204, and the second port 202 can be switched to be connected to the other of the third port 203 and the fourth port 204.

[0107] Specifically, referring to Figures 1 and 2, the first port 201 of the four-way valve 200 is connected to the outlet 301 of the oil separator 300 through the first refrigerant pipe 810, and the inlet of the oil separator 300 is connected to the compressor outlet through the third refrigerant pipe 820. The second interface 202 is connected to the inlet of the gas-liquid separator 400 through the second refrigerant pipe 820. The outlet of the gas-liquid separator 400 is connected to the return port of the compressor 500 through the fourth refrigerant pipe 840. The third interface 203 is connected to the outdoor heat exchanger 600 through a refrigerant pipe (unlabeled). The fourth interface 204 is connected to the indoor heat exchanger 21. The four-way valve 200 can selectively switch the connection between the first interface 201 and the third interface 203 or the fourth interface 204 according to the cooling or heating mode of the HVAC equipment. The second interface 202 can also be switched to be connected to the third interface 203 or the fourth interface 204. This allows the refrigerant discharged from the exhaust port of the compressor 500 to selectively enter the outdoor heat exchanger 600 or the indoor heat exchanger 21, thereby realizing the cooling or heating of the HVAC equipment.

[0108] Please refer to Figures 4 and 8. According to some embodiments of this application, there are multiple compressors 500 and multiple oil separators 300. The multiple oil separators 300 are respectively connected to the exhaust ports of multiple compressors 500. The first refrigerant pipe 810 includes a main refrigerant pipeline 811 and multiple refrigerant branch pipelines 812. The outlets 301 of the multiple oil separators 300 are respectively connected to the inlets of the multiple refrigerant branch pipelines 812. The outlets of the multiple refrigerant branch pipelines 812 are connected in parallel to the main refrigerant pipeline 811 through a three-way component 813. The outlet of the main refrigerant pipeline 811 is connected to the first interface 201.

[0109] The oil separator 300 can be configured as two, three, four, or more, and each oil separator 300 can be connected to a compressor 500, with a one-to-one correspondence between the compressor 500 and the oil separator 300. In some other implementations, one compressor 500 can also be connected to multiple oil separators 300. The oil separators 300 can be arranged side-by-side, all located below the four-way valve 200. Each oil separator 300 can be provided with an outlet 301. The oil separators 300, outlets 301, and refrigerant branch lines 812 can be correspondingly configured and connected, finally entering the first port 201 of the four-way valve 200 through the main refrigerant line 811. In the case where one four-way valve 200 connects to two oil separators 300, the outlets 301 of the two oil separators 300 can be located on opposite sides of the first port 201 in the horizontal direction, and the two oil separators 300 can be symmetrically arranged about the axis of the first port 201 of the four-way valve 200.

[0110] Referring to Figures 1 and 2, according to some embodiments of this application, the HVAC outdoor unit is provided with a pressure relief path. One of these paths is: pressure relief from the high-pressure side flow path of the outdoor unit to the low-pressure side flow path of the outdoor unit. Please refer to the electric valve 706 and the second capillary tube 822 in Figures 1 and 2, which relieves pressure on the high-pressure refrigerant from the oil separator to the low-pressure side flow path of the outdoor unit. Also, please refer to the first pressure relief valve 707 and the branch pressure relief pipeline with the first pressure relief valve 707 in Figures 1 and 2, which relieves pressure from the first refrigerant pipe 810 of the high-pressure side flow path of the outdoor unit to the low-pressure side flow path of the outdoor unit. The outlet of the pressure relief pipeline can be connected to the inlet of the gas-liquid separator 400. The first pressure relief valve 707 is located in the branch pressure relief pipeline and is used to control the opening or closing of the pressure relief pipeline. When the pressure in the system exceeds a set safety threshold, the first pressure relief valve 707 will open to release the pressure, preventing the system from malfunctioning or being damaged due to excessive pressure.

[0111] Referring to Figure 3, according to some embodiments of this application, optionally, the outdoor unit assembly further includes an adapter circuit board 710, which is used for electrical connection with the outdoor unit electrical control module 620. The adapter circuit board 710 is installed on the four-way valve 200 and is electrically connected to the valve control component of the four-way valve 200.

[0112] The adapter circuit board 710 is integrated on the four-way valve 200, which can centrally set up the relevant wires of the four-way valve 200. The communication signal can communicate with the main controller of the outdoor unit electrical control module 620 through the wires of the adapter circuit board 710, which reduces the complexity of the wire layout and helps to simplify the layout of components.

[0113] Furthermore, HVAC equipment may also include a gateway for external communication, capable of receiving external commands, requests, and other control target parameters. Further, HVAC equipment may also include sensors for detecting the indoor environment, such as temperature sensors, humidity sensors, and air conditioning quality sensors. HVAC equipment may also include sensors for detecting the outdoor environment, such as temperature sensors, humidity sensors, and air conditioning quality sensors.

[0114] The above description is merely a preferred embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. An outdoor unit assembly for use in HVAC equipment, the outdoor unit assembly comprising: The tank is used to connect to the compressor exhaust port or the compressor return port of the HVAC equipment via a refrigerant pipeline; At least one functional component is installed in the tank, the at least one functional component including at least one of a pressure sensor, a temperature sensor, a pressure switch, and a valve body.

2. The outdoor unit assembly according to claim 1, wherein, The at least one functional component includes a pressure sensor and / or a temperature sensor, which are mounted on the outer wall of the tank.

3. The outdoor unit assembly according to claim 2, wherein, The at least one functional component includes a pressure switch, which is mounted on the outer wall of the tank.

4. The outdoor unit assembly according to claim 3, wherein, The tank body is provided with a functional opening, and an adapter is installed in the functional opening. The connecting pipe of the pressure switch is installed on the adapter. or, The connecting pipe of the pressure sensor is installed on the adapter. or, The connecting pipe of the temperature sensor is installed on the adapter joint, or the sleeve of the temperature sensor is welded to the outer wall of the tank.

5. The outdoor unit assembly according to any one of claims 1-4, wherein, The tank is an oil separator. The top wall of the oil separator has an air outlet, and the side wall of the oil separator has an air inlet and at least one functional opening. The air inlet is connected to the compressor exhaust port through a refrigerant pipeline, and the air outlet outputs refrigerant gas. The at least one of the functional openings connects to at least one of the functional components.

6. The outdoor unit assembly according to claim 5, wherein, The functional openings are provided in multiple ways, including a first functional opening and a second functional opening. The first functional opening is located on the top wall, and the second functional opening is located on the bottom. The first functional opening is connected to at least one of the functional components, and the second functional opening is connected to the return port of the compressor via a first capillary tube. The first capillary tube is configured as an oil return path.

7. The outdoor unit assembly according to claim 5, wherein, The oil separator also includes a multi-port connector, which includes a main pipe and a plurality of branch pipes connected to the main pipe. The main pipe is connected to one of the functional openings, and at least one of the branch pipes is connected to at least one of the functional components.

8. The outdoor unit assembly according to claim 7, wherein, The at least one functional component includes a first functional component, and the first branch pipe of the plurality of branch pipes is connected to the first functional component. The first functional component is a pressure sensor or a temperature sensor. The second branch pipe of the plurality of branch pipes is connected to a first capillary tube, and the first capillary tube is connected to the compressor return port. The first capillary tube is configured as an oil return path.

9. The outdoor unit assembly according to claim 7 or 8, wherein, The third branch pipe of the plurality of branch pipes is connected to the second capillary tube, one end of the second capillary tube is connected to the third branch pipe, and the other end is connected to the compressor return port. The second capillary tube is configured as a pressure relief path. The at least one functional component includes a second functional component, which is an electric valve. The electric valve is disposed between the third branch tube and the second capillary tube. The electric valve opens or closes the second capillary tube and the third branch tube according to the detection value of the pressure sensor or the temperature sensor.

10. The outdoor unit assembly according to any one of claims 7-9, wherein the functional openings are provided in a plurality of ways, the plurality of functional openings including a first functional opening and a second functional opening, the first functional opening being disposed on the top wall, the second functional opening being disposed on the bottom, the at least one functional component further comprising a pressure switch, the pressure switch being installed in the first functional opening, and the main pipe of the multi-port connector being installed in the second functional opening.

11. The outdoor unit assembly according to claim 1, wherein, The tank is an oil separator, which has an air inlet, an air outlet, and at least one functional opening. An intake pipe is connected to the air inlet, and the intake pipe is connected to the compressor exhaust port via a refrigerant line. The at least one functional opening includes an oil return port, which is connected to the compressor gas return port via a first capillary tube, the first capillary tube being configured as an oil return path. The at least one functional component includes a valve body, the valve body further including a one-way valve, the one-way valve being disposed downstream of the air outlet and configured to allow unidirectional flow from the inside of the oil separator to the outside.

12. The outdoor unit assembly according to claim 11, wherein, The oil separator includes an outlet pipe, one end of which is connected to the inner cavity of the oil separator, and the other end is connected to the one-way valve.

13. The outdoor unit assembly according to claim 12, wherein, The one-way valve includes: Mounting base, the mounting base is installed on the top wall of the oil separator, the opposite sides of the mounting base include a first opening and a second opening connected to the first opening, the first opening is connected to the air outlet pipe; A valve seat is mounted on the side of the mounting base away from the oil separator. The valve seat has a valve cavity, and at least one through hole communicating with the valve cavity is provided on the periphery of the valve seat. A stop plate, which is movably disposed within the valve cavity, is used to open or close the second opening; The mounting base is located inside the valve cavity and has a first stop surface, while the top surface of the valve cavity has a second stop surface. The first stop surface and the second stop surface are respectively used to abut against the stop plate.

14. The outdoor unit assembly according to claim 1, wherein, The tank is a gas-liquid separator, which is connected to the compressor return port via a second refrigerant pipe.

15. The outdoor unit assembly according to claim 14, wherein, At least one of the functional components includes a pressure sensor, which is mounted on the outer wall of the gas-liquid separator.

16. A heating, ventilation, and air conditioning outdoor unit, comprising: The casing has a supporting base; and The support base supports a compressor, an outdoor heat exchanger, an oil separator, a gas-liquid separator, a first shut-off valve, and a second shut-off valve. The refrigerant pipeline connects the compressor discharge port and the oil separator, and connects the gas-liquid separator and the compressor return port; A four-way valve has a first port, a second port, a third port, and a fourth port. The first port is connected to an oil separator via a refrigerant line. The second port is connected to a gas-liquid separator via a refrigerant line. The third port is connected to the gas side of an outdoor heat exchanger via a refrigerant line. The liquid side of the outdoor heat exchanger is connected to a first shut-off valve via a refrigerant line. The fourth port is connected to a second shut-off valve via a refrigerant line. The four-way valve is configured such that the first port can be switched to be connected to either the third port or the fourth port, and the second port can be switched to be connected to either the third port or the fourth port.

17. A heating, ventilation, and air conditioning (HVAC) device, comprising: HVAC indoor units; and As described in claim 16, the HVAC indoor unit and the first and second shut-off valves of the HVAC outdoor unit are connected via liquid-side and gas-side connecting pipes, respectively.

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