Outdoor unit assembly, heating and ventilation outdoor unit, and heating and ventilation device

Abstract

The application belongs to the technical field of heating and ventilation equipment, and particularly relates to an outdoor unit assembly, a heating and ventilation equipment outdoor unit and a heating and ventilation equipment. The outdoor unit assembly is used for the heating and ventilation equipment, and comprises: a refrigerant system, which comprises a compressor, the compressor having a compressor exhaust port and a compressor return air port; a tank body, which is communicated with the compressor exhaust port or the compressor return air port through a refrigerant pipeline; and at least one functional component, which is installed on the tank body and comprises at least one of a pressure sensor, a temperature sensor, a pressure switch and a valve body. Through the technical scheme of the application, the at least one functional component is integrated on the tank body, and one or more functions are realized, so that the volume of the outdoor unit assembly can be reduced, the pipeline consumption of the outdoor unit assembly can be reduced, and the cost can be reduced.

Description

Technical Field

[0001] This application belongs to the field of HVAC equipment technology, specifically relating to an outdoor unit component, an HVAC outdoor unit, and HVAC equipment. Background Technology

[0002] 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

[0003] 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:

[0004] The first aspect of this application provides an outdoor unit assembly for HVAC equipment, the outdoor unit assembly comprising: a refrigerant system including a compressor having a compressor discharge port and a compressor return port; a tank connected to the compressor discharge port or the compressor return port via a refrigerant pipeline; and at least one functional component installed in the tank, the at least one functional component including at least one of a temperature sensor, a pressure sensor, a pressure switch, and a valve body.

[0005] According to the outdoor unit component provided in this application, by integrating and installing at least one functional component on the tank, the at least one functional component can be at least one of temperature sensor, pressure sensor, pressure switch and valve body, thereby reducing the space occupied and arranged by at least one functional component in the entire outdoor unit component, saving the external connection pipeline required when connecting the functional component, reducing the amount of pipeline used, reducing costs, and at the same time, facilitating later maintenance and management, and improving the installation efficiency of the entire outdoor unit component.

[0006] In addition, the outdoor unit assembly according to this application may also have the following additional technical features:

[0007] In some embodiments of this application, the functional components are pressure sensors and / or temperature sensors, which are installed on the outer wall of the tank, and the tank is connected to the compressor exhaust port through a refrigerant pipeline.

[0008] In some embodiments of this application, the functional component is a pressure switch, which is installed on the outer wall of the tank. The tank is connected to the compressor exhaust port through a refrigerant pipeline. The pressure switch is used to stop the compressor from running when the exhaust pressure of the compressor exceeds a preset threshold.

[0009] In some embodiments of this application, the tank is an oil separator, which has an air inlet, an air outlet, and an oil return port. The air inlet is configured to be connected to the compressor exhaust port via a first refrigerant pipeline, and the oil return port is connected to the compressor air return port via a first oil return capillary tube.

[0010] In some embodiments of this application, the functional component is a valve body, the valve body includes an electric valve, and the outdoor unit assembly further includes a second oil return capillary tube, which is connected to the oil separator and the compressor return port respectively; wherein, the second oil return capillary tube is provided with the functional component for connecting or disconnecting the second oil return capillary tube.

[0011] In some embodiments of this application, the outdoor unit assembly further includes an exhaust pipe that is connected to the exhaust port and extends into the interior of the oil separator.

[0012] In some embodiments of this application, the functional component is a valve body, and the valve body further includes a one-way valve. The one-way valve is disposed between the air outlet and the first refrigerant pipeline, and the one-way valve is configured to allow one-way flow from the inside of the oil separator to the outside.

[0013] In some embodiments of this application, the top wall of the oil separator is provided with the air outlet, the side wall of the oil separator is provided with the air inlet and the functional opening, and the oil separator further includes a multi-way connector, the multi-way connector includes a main pipe and a plurality of branch pipes connected to the main pipe, the main pipe is connected to the functional opening, and at least one of the plurality of branch pipes is connected to at least one of the functional components.

[0014] In some embodiments of this application, multiple functional components include a first functional component, a first branch pipe among multiple 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 multiple branch pipes is connected to a first oil return capillary, and the first oil return capillary is connected to the compressor return port.

[0015] In some embodiments of this application, a third branch pipe among multiple branch pipes is connected to a second return oil capillary. One end of the second return oil capillary is connected to the third branch pipe, and the other end is connected to the compressor return port. The multiple functional components also include a second functional component, which is an electric valve. The electric valve is disposed between the third branch pipe and the second return oil capillary and is used to connect or disconnect the second return oil capillary.

[0016] In some embodiments of this application, the outdoor unit assembly further includes a four-way valve having a first port, a second port, a third port, and a fourth port. The first port is disposed facing and connected to the oil separator. The second port is connected to the compressor return port. The third port is connected to the outdoor heat exchanger. The fourth port is connected to the indoor heat exchanger. The four-way valve is configured such that the first port is switchably connected to one of the third port and the fourth port, and the second port is switchably connected to the other of the third port and the fourth port.

[0017] In some embodiments of this application, the tank is a gas-liquid separator, which is connected to the compressor return port via a second refrigerant pipeline.

[0018] 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.

[0019] In some embodiments of this application, there are multiple compressors and multiple oil separators. The multiple oil separators are respectively connected to the discharge ports of multiple compressors. The refrigerant pipeline includes a main refrigerant pipeline and multiple branch refrigerant pipelines. The outlets of the multiple oil separators are respectively connected to the inlets of the multiple branch refrigerant pipelines. The outlets of the multiple branch refrigerant pipelines are connected in parallel to the main refrigerant pipeline. The outlet of the main refrigerant pipeline is connected to the first interface.

[0020] The second aspect of this application provides a heating and ventilation outdoor unit, comprising: a housing having a support base; and an outdoor unit assembly as described in any one of the embodiments of the first aspect, the outdoor unit assembly being disposed on the support base.

[0021] A third aspect of this application provides a heating, ventilation, and air conditioning (HVAC) system, including an indoor HVAC unit and an outdoor HVAC unit as described in the second aspect, wherein the indoor HVAC unit is connected to the outdoor HVAC unit via a refrigerant pipeline.

[0022] 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

[0023] 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:

[0024] 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:

[0025] Figure 1 This 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;

[0026] Figure 2 This is a system schematic diagram of the heating process of an HVAC equipment according to an embodiment of this application;

[0027] Figure 3 This is a system schematic diagram of a heating, ventilation, and air conditioning (HVAC) device according to another embodiment of this application;

[0028] Figure 4 This is a partial structural diagram of an outdoor unit component of a heating, ventilation, and air conditioning (HVAC) system according to an embodiment of this application;

[0029] Figure 5 This is a schematic diagram of the structure of an oil separator proposed in some embodiments of this application;

[0030] Figure 6 This is a schematic diagram of another part of the outdoor unit assembly of the HVAC equipment proposed in one embodiment of this application;

[0031] Figure 7 This is a schematic diagram of the structure of a functional connector proposed in some embodiments of this application;

[0032] Figure 8 This is a partial structural schematic diagram of the outdoor unit component of a heating, ventilation, and air conditioning (HVAC) device according to another embodiment of this application;

[0033] in, Figure 1 and Figure 2 The arrows in the diagram indicate the direction of refrigerant flow.

[0034] The labels in the attached diagram are as follows:

[0035] 10. Outdoor HVAC unit;

[0036] 100. Housing; 110. Support base;

[0037] 200. Four-way valve; 201. First port; 202. Second port; 203. Third port; 204. Fourth port;

[0038] 300, Oil separator; 301, Air outlet; 302, Air inlet; 303, Functional opening; 304, Oil return port; 310, Air outlet pipe; 320, Air inlet pipe; 330, Multi-port connector; 331, Main pipe; 332, First branch pipe; 333, Second branch pipe; 334, Third branch pipe;

[0039] 400, Gas-liquid separator; 401, First gas-liquid separation inlet; 410, Top wall of gas-liquid separator;

[0040] 500. Compressor;

[0041] 600. Outdoor heat exchanger; 610. Outdoor fan;

[0042] 701. Check valve; 702. Pressure switch; 703. Electronic expansion valve; 704. Pressure sensor; 705. Low pressure sensor; 706. Electric valve; 707. First pressure relief valve; 708. Second pressure relief valve; 710. Adapter circuit board; 711. First shut-off valve; 712. Second shut-off valve;

[0043] 810. First refrigerant line; 811. Main refrigerant line; 812. Branch refrigerant line; 820. Second refrigerant line; 821. First return capillary tube; 822. Second return capillary tube; 823. Gas injection line; 824. Bypass line;

[0044] 20. Indoor HVAC unit; 21. Indoor heat exchanger; 22. Indoor fan. Detailed Implementation

[0045] 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.

[0046] 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.

[0047] 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.

[0048] 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.

[0049] This application provides a heating, ventilation, and air conditioning (HVAC) system, which can be used as a cooling or heating device such as a household air conditioner, central air conditioner, heat pump system, or multi-split system. 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 work together to achieve the functions of cooling, heating, dehumidification, and air purification, thereby achieving comfortable air quality.

[0050] When HVAC equipment is used as a central air conditioning system, there is usually one outdoor unit 10, while there can be multiple indoor units 20. Each indoor unit 20 is equipped with one or more air outlets to discharge cooled, heated, dehumidified, or purified air into the room. The indoor unit 20 usually contains an indoor heat exchanger 21, and the outdoor unit 10 usually contains an outdoor heat exchanger 600. The indoor heat exchanger 21 and the outdoor heat exchanger 600 are usually connected by refrigerant pipes, allowing refrigerant to circulate between them.

[0051] During the cooling process of the HVAC equipment, the indoor heat exchanger 21 acts as an evaporator. The refrigerant in the evaporator changes from a liquid state to a gaseous state, absorbing heat during evaporation. During this process, the evaporator exchanges heat with the 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, causing the indoor unit 20 to blow out cold air. Simultaneously, the outdoor heat exchanger 600 acts as a condenser. The refrigerant in the condenser changes from a gaseous state to a liquid state, releasing heat during condensation. During this process, the condenser exchanges heat with the air flowing through it in the outdoor unit 10, carrying the heat from the condenser to the outside of the outdoor unit 10, thus achieving the cooling process.

[0052] During the heating process of the HVAC equipment, the outdoor heat exchanger 600 acts as an evaporator. The refrigerant in the evaporator changes from a liquid state to a gaseous state, absorbing heat. During the heat absorption process of the refrigerant evaporation, the evaporator exchanges heat with the air flowing through it, transferring the heat carried by the air in the outdoor unit 10 to the refrigerant in the evaporator. At the same time, the indoor heat exchanger 21 acts as a condenser. The refrigerant in the condenser changes from a gaseous state to a liquid state. During the heat release process of the refrigerant condensation, the condenser exchanges heat with the air flowing through it in the indoor unit 20, allowing the air in the indoor unit 20 to carry away the heat carried by the condenser and discharge it from the indoor unit 20 to the room outside the indoor unit 20, causing the indoor unit 20 to blow hot air. In this way, the heating process is achieved.

[0053] The HVAC system also includes a compressor 500, throttling components (such as an electronic expansion valve 703), an oil separator 300, and a gas-liquid separator 400. To reduce indoor noise, the compressor 500, throttling components, oil separator 300, and gas-liquid separator 400 are usually installed outdoors. These outdoor components, including the compressor 500, throttling components, oil separator 300, gas-liquid separator 400, and outdoor heat exchanger 600, can be collectively referred to as the outdoor unit assembly. When the HVAC system can both cool and heat, it also includes components such as a four-way valve 200 to allow switching between cooling and heating modes.

[0054] See 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 refrigerant system, a tank, and at least one functional component. The refrigerant system includes a compressor 500, which has a compressor discharge port and a compressor return port. The tank is connected to the compressor discharge port or the compressor return port via a refrigerant pipeline. At least one functional component is installed in the tank, and the at least one functional component 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 on the tank. The at least one functional component can be at least one of a temperature sensor, a 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 in the entire outdoor unit assembly, saves the external connection pipelines required when connecting the functional component, reduces the amount of pipelines used, lowers costs, facilitates later maintenance and management, and improves the installation efficiency of the entire outdoor unit assembly.

[0058] According to some embodiments of this application, the functional components are pressure sensor 704 and / or temperature sensor. Pressure sensor 704 and / or temperature sensor are installed on the outer wall of the tank and connected to the compressor exhaust port. The tank is connected to the compressor exhaust port through a refrigerant pipeline.

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

[0060] Temperature sensors are used to detect the exhaust temperature at the compressor's discharge port.

[0061] By integrating at least one of the pressure sensor 704 and the temperature sensor onto the outer wall of the tank and connecting it to the compressor exhaust port, 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, the functional component is a pressure switch 702. The pressure switch 702 is installed on the outer wall of the tank and connected to the compressor exhaust port. The tank is connected to the compressor exhaust port through a refrigerant pipeline. The pressure switch 702 is used to stop the compressor 500 from running when the exhaust pressure of the compressor 500 exceeds a preset threshold.

[0063] For example, pressure switch 702 is a high-pressure switch.

[0064] Pressure switch 702 is used to connect to the electrical control system of HVAC outdoor unit 10. When pressure sensor 704 detects that the discharge pressure of compressor 500 is greater than a preset threshold, pressure switch 702 can disconnect the power supply of compressor 500, thereby stopping compressor 500 from running and improving the safety of compressor 500 operation.

[0065] Please see Figure 1 , Figure 2 , Figure 5 and Figure 6 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 an oil return port 304. The air inlet 302 is configured to be connected to the compressor exhaust port through a first refrigerant pipeline 810, and the oil return port 304 is connected to the compressor air return port through a first oil return capillary tube 821.

[0066] Specifically, one end of the first oil return capillary tube 821 is connected to the oil return port of the oil separator 300, and the other end is connected to the air return port of the compressor.

[0067] 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 discharged to the four-way valve 200 through the outlet and refrigerant pipeline, while the lubricating oil can flow back into the compressor 500 through the first return oil capillary tube 821. This helps to improve the stability of the compressor 500's operation and ensures the efficient and safe operation of the system.

[0068] See Figure 1 and Figure 2According to some embodiments of this application, the functional component is a valve body, which includes an electric valve 706. The outdoor unit assembly also includes a second oil return capillary tube 822, which is connected to the oil separator 300 and the compressor return port respectively. The second oil return capillary tube 822 is provided with a functional component for connecting or disconnecting the second oil return capillary tube 822.

[0069] The second oil return capillary 822 is also used to return the lubricating oil separated by the oil separator 300 to the compressor 500. An electric valve 706 is installed in the second oil return capillary 822. The electric valve 706 can open the second oil return capillary 822 when the compressor 500 needs rapid oil return, and can control the flow rate of the returned oil to improve the oil return efficiency of the compressor 500. When the oil return volume of the first oil return capillary meets the normal operating conditions of the compressor 500, the electric valve 706 remains closed to the second oil return capillary to reduce the product's operating power consumption.

[0070] See Figure 5 According to some embodiments of this application, the outdoor unit assembly also includes an exhaust pipe 310, which is connected to and communicates with an exhaust port 301 and extends into the interior of the oil separator 300.

[0071] For example, one end of the vent pipe can extend into the interior of the oil separator 300, and the other end is used to connect to the four-way valve 200.

[0072] After the refrigerant and lubricating oil mixture flowing into the compressor 500 is separated by the oil separator 300, the separated refrigerant can be discharged to the four-way valve 200 through the outlet pipe 310 connected to the outlet 301, and then flow into the outdoor heat exchanger 600 or the indoor heat exchanger 21 through the four-way valve 200.

[0073] See Figure 4 and Figure 5 According to some embodiments of this application, the functional component is a valve body, which also includes a one-way valve 701. The one-way valve 701 is disposed between the air outlet 301 and the first refrigerant pipeline 810, and the one-way valve 701 is configured to unidirectionally flow from the inside of the oil separator 300 to the outside.

[0074] For example, the one-way valve 701 can be located on the vent pipe extending into the interior of the oil separator 300, or it can be located outside the oil separator 300.

[0075] The one-way valve 701 enables one-way flow from the inside to the outside of the oil separator 300, and ensures that the refrigerant separated by the oil separator 300 can only flow to the four-way valve 200, and cannot flow back to the oil separator 300 or the compressor 500, thereby improving the safety of the oil separator 300 or the compressor 500.

[0076] See Figure 6 and Figure 7 According to some embodiments of this application, the top wall of the oil separator 300 is provided with an air outlet 301, the side wall of the oil separator 300 is provided with an air inlet 302 and a functional opening 303, and 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 the functional opening 303, and at least one of the plurality of branch pipes is connected to at least one functional component.

[0077] By creating functional openings on the side wall of the oil separator 300, which connect to the main pipe of the multi-way connector, and connecting multiple branch pipes to the functional openings via the main pipes, the oil separator's internal structure is connected. Furthermore, by installing at least one functional component on at least one of the branch pipes, each branch pipe can perform different functions, such as pressure detection, temperature detection, and control of return oil flow. This improves the integration of the oil separator and enhances the installation efficiency of the entire outdoor unit assembly.

[0078] See Figure 7 According to some embodiments of this application, multiple functional components include a first functional component, a first branch pipe 332 of multiple 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 333 of multiple branch pipes is connected to a first oil return capillary 821, and the first oil return capillary 821 is connected to the compressor return port.

[0079] By connecting a pressure sensor or a temperature sensor to the first branch pipe 332, the pressure or temperature within the oil separator 300 can be detected by the pressure sensor or temperature sensor, allowing the system to determine whether to maintain normal operation or shut down for maintenance based on the detected pressure or temperature. The second branch pipe 333, connected to a first return capillary pipe 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 in this case, the functional opening can be used in place of the return port.

[0080] Specifically, when the pressure sensor detects that the pressure inside the oil separator 300 reaches a preset pressure threshold, the system power supply needs to be cut off for maintenance. The preset pressure threshold is the maximum safe pressure threshold during normal system operation. Similarly, when the temperature sensor detects that the temperature inside the oil separator 300 reaches a preset temperature threshold, the system power supply needs to be cut off for maintenance. The preset temperature threshold is the maximum safe temperature threshold during normal system operation.

[0081] See Figure 7According to some embodiments of this application, the third branch pipe 334 of the plurality of branch pipes is connected to the second return oil capillary pipe 822. One end of the second return oil capillary pipe 822 is connected to the third branch pipe 334, and the other end is connected to the compressor return port. The plurality of functional components also include a second functional component, which is an electric valve 706. The electric valve 706 is disposed between the third branch pipe 334 and the second return oil capillary pipe 822 and is used to connect or disconnect the second return oil capillary pipe 822.

[0082] By setting a second oil return 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 oil return capillary tube 822, the electric valve 706 can regulate the flow rate of lubricating oil in the second oil return capillary tube 822, and can open or close the second oil return capillary tube. In this way, when the oil return volume of the first oil return capillary tube 821 is insufficient, the oil return volume can be supplemented to the compressor 500 through the second oil return capillary tube 822, thereby further improving the stability of system operation.

[0083] See Figure 1 , Figure 2 and Figure 4 According to some embodiments of this application, the outdoor unit assembly further includes a four-way valve 200, which has a first port 201, a second port 202, a third port 203, and a fourth port 204. The first port 201 is disposed toward and connected to the oil separator 300. The second port 202 is used to connect to the compressor return port. The third port 203 is used to connect to the outdoor heat exchanger 600. The fourth port 204 is used to connect to the indoor heat exchanger 21. The four-way valve 200 is configured such that the first port 201 can be switched to connect to one of the third port 203 and the fourth port 204, and the second port 202 can be switched to connect to the other of the third port 203 and the fourth port 204.

[0084] The first port 201 of the four-way valve 200 is connected to the outlet 301 of the oil separator 300 via a refrigerant pipeline, which in turn connects the oil separator 300 to the compressor discharge port. The second port 202 is connected to the compressor return port, the third port 203 is connected to the outdoor heat exchanger 600, and the fourth port 204 is connected to the indoor heat exchanger 21. The four-way valve 200 can selectively switch the connection between the first port 201 and the third port 203 or the fourth port 204 according to the cooling or heating mode of the HVAC equipment. The second port 202 can also be switched to be connected to either the third port 203 or the fourth port 204. This allows the refrigerant discharged from the compressor discharge port to selectively enter the outdoor heat exchanger 600 or the indoor heat exchanger 21, thereby achieving cooling or heating for the HVAC equipment.

[0085] See Figure 1and Figure 2 According to some embodiments of this application, the tank is a gas-liquid separator 400, which is connected to the compressor return port through a second refrigerant pipeline 820.

[0086] The gas-liquid separator 400 is configured to connect to the compressor return port through the second refrigerant line 820. The gas-liquid separator 400 has a first gas-liquid separation inlet 401 that communicates with the second interface 202. The first gas-liquid separation inlet 401 is located on the top wall 410 of the gas-liquid separator.

[0087] The bottom of the gas-liquid separator 400 can be mounted and fixed on the support base 110. The gas-liquid separator 400 can store a portion of the refrigerant in the system and separate the gaseous and liquid components of the refrigerant. In HVAC systems, the compressor 500 compresses the refrigerant into high-temperature, high-pressure vapor, which is then sent to the condenser. In the condenser, some of the refrigerant condenses into liquid, while some remains gaseous. The gas-liquid separator 400 separates these two states of refrigerant, ensuring that liquid refrigerant enters the electronic expansion valve 703 and the evaporator, while gaseous refrigerant returns to the compressor 500. The gas-liquid separator 400 effectively protects the compressor 500, reducing the risk of damage caused by liquid refrigerant directly entering the compressor 500.

[0088] 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.

[0089] In some embodiments, a low-pressure sensor 705 is provided on the second refrigerant line 820. The low-pressure sensor 705 is used to detect the pressure of the second refrigerant line 820, which is also the pressure of the low-pressure side of the compressor 500 (i.e., the low-pressure side of the system).

[0090] Please see Figure 4 and Figure 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 discharge ports of multiple compressors. The refrigerant pipeline 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. The outlet of the main refrigerant pipeline 811 is connected to the first interface 201.

[0091] 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.

[0092] See Figure 1 and Figure 2 According to some embodiments of this application, the outdoor unit assembly also includes a first pressure relief valve 707, which is installed on the four-way valve 200 and is used to be installed on a pressure relief pipeline connected to the compressor exhaust port.

[0093] The pressure relief pipeline is connected between the first port 201 of the four-way valve 200 and the oil separator 300. Specifically, the inlet of the pressure relief pipeline can be connected to the refrigerant pipeline between the one-way valve 701 and the first port 201, and the outlet of the pressure relief pipeline can be connected to the inlet of the gas-liquid separator 400. A first pressure relief valve 707 is installed in the pressure relief pipeline and is used to control the opening or closing of the pressure relief pipeline. When the pressure in the system exceeds the set safety threshold, the first pressure relief valve 707 will open to release the pressure and prevent the system from malfunctioning or being damaged due to excessive pressure.

[0094] See Figure 1 and Figure 2 In some embodiments, the outdoor unit assembly also includes a second pressure relief valve 708, which is mounted on the four-way valve 200 and is configured to be located on a bypass line 824 that is connected to the air supply line 823 of the compressor 500.

[0095] like Figure 1 and Figure 2As shown, the HVAC equipment includes a bypass line 824 and a make-up air line 823. One end of the make-up air line 823 can be connected between the electronic expansion valve 703 and the indoor heat exchanger 21. Specifically, a first shut-off valve 711 can be installed on the refrigerant line between the electronic expansion valve 703 and the indoor heat exchanger 21. One end of the make-up air line 823 can be connected to the refrigerant line between the electronic expansion valve 703 and the first shut-off valve 711. The other end of the make-up air line 823 is connected to the make-up air port of the compressor 500. One end of the bypass line 824 is connected to the gas-liquid separator 400. Specifically, the bypass line 824 can be connected to the gas-liquid separator 400 through the second refrigerant main line 811. The other end of the bypass line 824 is connected to the make-up air line 823. A fifth valve control component is installed on the bypass line 824 and is used to control the opening or closing of the bypass line 824.

[0096] In some embodiments, the outdoor unit assembly may further include a second shut-off valve 712, which is disposed on the refrigerant line between the four-way valve 200 and the indoor heat exchanger 21.

[0097] See Figure 3 According to some embodiments of this application, the outdoor unit assembly may optionally include an adapter circuit board 710 for electrical connection with the electrical control box of the HVAC equipment. The adapter circuit board 710 is mounted on the four-way valve 200 and is electrically connected to the valve control assembly of the four-way valve 200.

[0098] 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 outside world 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.

[0099] According to some embodiments of this application, this application also proposes a heating and ventilation outdoor unit 10, including: a housing 100 as an outdoor unit assembly as described in any of the first aspect embodiments, the housing 100 having a support base 110, and the outdoor unit assembly disposed on the upper surface of the support base 110.

[0100] The HVAC outdoor unit 10 proposed in this embodiment has a housing 100. Outdoor components such as an outdoor heat exchanger 600, a compressor 500, a throttling device, an oil separator 300, and a gas-liquid separator 400 can be mounted on a support base 110 of the housing 100. The housing 100 can be provided with air inlets and outlets for airflow. The HVAC outdoor unit 10 may also have an outdoor fan 610, which is positioned corresponding to the outdoor heat exchanger 600 and is used to guide airflow quickly through the outdoor heat exchanger 600.

[0101] According to some embodiments of this application, this application also proposes a heating, ventilation, and air conditioning (HVAC) device, including an indoor HVAC unit 20 and an outdoor HVAC unit 10 as described in the second aspect embodiment, wherein the indoor HVAC unit 20 is connected to the outdoor HVAC unit 10 via a refrigerant pipeline.

[0102] The HVAC equipment proposed in this application embodiment can be an air conditioner, heat pump system, multi-split system, or other equipment used for cooling or heating. Since it includes the HVAC outdoor unit 10 of the second aspect, it also has the technical effects of any of the above embodiments.

[0103] In some embodiments, the indoor and outdoor units of the HVAC system may also have an outer casing, and outdoor components such as the indoor heat exchanger 21 may be housed inside the casing. The outer casing may be provided with air inlets and outlets for airflow. The indoor unit 20 of the HVAC system may also have an indoor fan 22, which is provided corresponding to the indoor heat exchanger 21 and is used to guide airflow to flow quickly through the indoor heat exchanger 21.

[0104] 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.

[0105] 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, characterized in that, The outdoor unit components include: A refrigerant system, including a compressor having a compressor discharge port and a compressor return port; The tank is connected to the compressor exhaust port or the compressor return port via a refrigerant pipeline; At least one functional component is installed in the tank body, and the at least one functional component includes at least one of a pressure sensor, a temperature sensor, a pressure switch, and a valve body; The tank is an oil separator, and the side wall of the oil separator has a functional opening. The oil separator also includes a multi-port connector, which includes a main pipe and multiple branch pipes connected to the main pipe. The main pipe is connected to the functional opening, and at least one of the multiple branch pipes is connected to at least one of the functional components.

2. The outdoor unit assembly according to claim 1, characterized in that, The functional components are pressure sensors and / or temperature sensors, which are installed on the outer wall of the tank. The tank is connected to the compressor exhaust port through a refrigerant pipeline.

3. The outdoor unit component according to claim 1, characterized in that, The functional component is a pressure switch, which is installed on the outer wall of the tank. The tank is connected to the compressor exhaust port through a refrigerant pipeline. The pressure switch is used to stop the compressor from running when the compressor exhaust pressure exceeds a preset threshold.

4. The outdoor unit component according to any one of claims 1-3, characterized in that, The tank is an oil separator, which has an air inlet, an air outlet, and an oil return port. The air inlet is configured to be connected to the compressor exhaust port via a first refrigerant pipeline, and the oil return port is connected to the compressor air return port via a first oil return capillary tube.

5. The outdoor unit component according to claim 4, characterized in that, The outdoor unit assembly also includes a second oil return capillary tube, which is connected to the oil separator and the compressor return port, respectively.

6. The outdoor unit assembly according to claim 4, characterized in that, The outdoor unit assembly also includes an exhaust pipe, which is connected to the exhaust port and extends into the interior of the oil separator.

7. The outdoor unit assembly according to claim 4, characterized in that, The functional component is a valve body, which further includes a one-way valve. The one-way valve is located between the air outlet and the first refrigerant pipeline, and the one-way valve is configured to allow one-way flow from the inside of the oil separator to the outside.

8. The outdoor unit assembly according to claim 5, characterized in that, The oil separator has an air outlet on its top wall and an air inlet on its side wall.

9. The outdoor unit assembly according to claim 8, characterized in that, The functional components include a first functional component, and a first branch pipe among the 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 the plurality of branch pipes is connected to the first oil return capillary, and the first oil return capillary is connected to the compressor return port.

10. The outdoor unit assembly according to claim 9, characterized in that, The third branch pipe of the plurality of branch pipes is connected to the second return oil capillary. One end of the second return oil capillary is connected to the third branch pipe, and the other end is connected to the compressor return port. The 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 return oil capillary and is used to open or close the second return oil capillary.

11. The outdoor unit assembly according to claim 4, characterized in that, The outdoor unit assembly also includes: A four-way valve has a first port, a second port, a third port, and a fourth port. The first port is disposed facing the oil separator and is connected to the oil separator. The second port is used to connect to the compressor return port. The third port is used to connect to the outdoor heat exchanger. The fourth port is used to connect to the indoor heat exchanger. The four-way valve is configured such that the first port can be switched to connect to one of the third port and the fourth port, and the second port can be switched to connect to the other of the third port and the fourth port.

12. The outdoor unit assembly according to claim 11, characterized in that, The compressor and the oil separator are both multiple, and the multiple oil separators are respectively connected to the discharge ports of the multiple compressors. The refrigerant pipeline includes a main refrigerant pipeline and multiple branch refrigerant pipelines. The outlets of the multiple oil separators are respectively connected to the inlets of the multiple branch refrigerant pipelines. The outlets of the multiple branch refrigerant pipelines are connected in parallel to the main refrigerant pipeline. The outlet of the main refrigerant pipeline is connected to the first interface.

13. A heating, ventilation, and air conditioning outdoor unit, characterized in that, include: The casing has a supporting base; and The outdoor unit assembly as described in any one of claims 1-12, wherein the outdoor unit assembly is disposed on the support base.

14. A heating, ventilation, and air conditioning (HVAC) device, characterized in that, include: HVAC indoor units; and The HVAC outdoor unit as described in claim 13, wherein the HVAC indoor unit and the HVAC outdoor unit are connected via refrigerant piping.

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