Heating and ventilation equipment outdoor unit and heating and ventilation equipment

Abstract

The utility model discloses a heating and ventilation equipment outdoor unit and heating and ventilation equipment, and relates to the technical field of heating and ventilation equipment. The heating and ventilation equipment outdoor unit comprises a refrigerant storage container, an oil separator, a four-way valve, a main liquid return pipeline, a gathering pipeline, a bypass liquid return pipeline, a bypass oil return pipeline and a compressor. According to the utility model, the bypass liquid return pipeline and the bypass oil return pipeline which are respectively connected with the main liquid return pipeline through interfaces originally are designed to be connected in parallel through the gathering pipeline, so that only one interface communicated with the gathering pipeline needs to be arranged on the main liquid return pipeline; compared with the prior art that two connectors are arranged on the main liquid return pipeline to be connected with the bypass liquid return pipeline and the bypass oil return pipeline respectively, the number of the connectors of the main liquid return pipeline is reduced, the length of the main liquid return pipeline can be reduced, therefore, the space occupied by the main liquid return pipeline in the machine body is reduced, the machining and assembling difficulty can be reduced, and the machining cost is reduced. The production cost is reduced.

Description

Technical Field

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

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

[0003] The outdoor unit of HVAC equipment includes functional devices such as a low-pressure tank, a compressor, and an oil separator. Among them, the low-pressure tank not only needs to be connected to the oil separator and the compressor through a liquid return pipeline, but also needs to be provided with a plurality of interfaces on the liquid return pipeline, and a bypass oil return pipeline, a low-pressure connection pipeline, and various sensors are connected through the plurality of interfaces.

[0004] The plurality of interfaces not only extend the overall length of the liquid return pipeline, occupy the space of the outdoor unit body, but also make the processing and assembly of the liquid return pipeline more complex, increasing the production cost. Summary of the Utility Model

[0005] The purpose of the utility model is to at least solve the problem of the complex structure of the existing outdoor unit of HVAC equipment. This purpose is achieved through the following technical solutions:

[0006] In a first aspect, the utility model provides an outdoor unit of HVAC equipment, including a refrigerant storage container, an oil separator, a four-way valve, a main liquid return pipeline, a collecting pipeline, a bypass liquid return pipeline, a bypass oil return pipeline, and a compressor; one end of the main liquid return pipeline is communicated with the refrigerant storage container, and the other end of the main liquid return pipeline is communicated with the gas return interface of the four-way valve; the collecting pipeline has a first end and a second end, the first end is communicated with the main liquid return pipeline, one end of the bypass liquid return pipeline is communicated with the second end, the other end of the bypass liquid return pipeline is communicated with the exhaust interface of the four-way valve through an exhaust pipe, the exhaust pipe is the main pipeline between the compressor and the four-way valve, and the oil separator is arranged on the exhaust pipe; one end of the bypass oil return pipeline is communicated with the second end, and the other end of the bypass oil return pipeline is communicated with the oil separator.

[0007] According to the outdoor unit of HVAC equipment provided by the utility model, the bypass liquid return pipeline and the bypass oil return pipeline, which were originally connected to the main liquid return pipeline through interfaces respectively, are designed to be connected in parallel through a collecting pipeline. Therefore, only one interface communicating with the collecting pipeline needs to be opened on the main liquid return pipeline. Compared with the related art in which two interfaces are arranged on the main liquid return pipeline to connect the bypass liquid return pipeline and the bypass oil return pipeline respectively, the opening of the interfaces on the main liquid return pipeline is reduced, the length of the main liquid return pipeline can be reduced, thereby reducing the space occupied by the body, and the processing and assembly difficulty can be reduced, and the production cost can be reduced.

[0008] In addition, the outdoor unit of the heating, ventilation and air conditioning (HVAC) equipment provided by the present utility model may further have the following additional technical features:

[0009] In some embodiments of the present utility model, the outdoor unit of the HVAC equipment further includes a three-way pipe located at the second end. The three-way pipe includes a first interface, a second interface and a third interface that are interconnected. The first interface is in communication with the second end, the second interface is in communication with one end of the bypass liquid return pipeline, and the third interface is in communication with one end of the bypass oil return pipeline.

[0010] In some embodiments of the present utility model, the outdoor unit of the HVAC equipment further includes an opening and closing mechanism. The opening and closing mechanism is connected to the bypass liquid return pipeline or the second interface and is used to control the communication or disconnection between the bypass liquid return pipeline and the second interface.

[0011] In some embodiments of the present utility model, the opening and closing mechanism includes an electromagnetic valve.

[0012] In some embodiments of the present utility model, the bypass liquid return pipeline includes a first section, a first bent section and a second section that are connected in sequence. The first bent section is arranged in a ring shape, and the connection position between the first bent section and the first section overlaps the connection position formed between the first bent section and the second section; and / or, the bypass oil return pipeline includes a third section, a second bent section and a fourth section that are connected in sequence. The second bent section is arranged in a ring shape, and the connection position between the second bent section and the third section overlaps the connection position formed between the second bent section and the fourth section.

[0013] In some embodiments of the present utility model, the outdoor unit of the HVAC equipment further includes a first connecting member. The first connecting member connects the first bent section and the exhaust pipe.

[0014] In some embodiments of the present utility model, the first connecting member includes a first strap. The first strap is sleeved on the first bent section and the exhaust pipe.

[0015] In some embodiments of the present utility model, the outdoor unit of the HVAC equipment further includes a second connecting member. The second connecting member connects the exhaust pipe and the second bent section.

[0016] In some embodiments of the present utility model, the first connecting member includes a second strap. The second strap is sleeved on the second bent section and the exhaust pipe.

[0017] In a second aspect, the present utility model provides a heating, ventilation and air conditioning (HVAC) equipment, including an indoor unit of the HVAC equipment and an outdoor unit of the HVAC equipment as shown in any one of the above technical solutions. The indoor unit of the HVAC equipment and the outdoor unit of the HVAC equipment are connected through pipelines. Brief Description of the Drawings

[0018] By reading the following detailed description of the preferred embodiments, various other advantages and benefits will become clear to those of ordinary skill in the art. The drawings are only for the purpose of showing the preferred embodiments and are not considered to be a limitation of the present utility model. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. In the drawings:

[0019] Figure 1 Schematically shows a schematic structural diagram of an outdoor unit of a heating, ventilation and air conditioning (HVAC) device provided according to an embodiment of the present utility model;

[0020] Figure 2 Schematically shows a partial schematic structural diagram of an outdoor unit of a heating, ventilation and air conditioning (HVAC) device provided according to an embodiment of the present utility model;

[0021] Figure 3 Schematically shows a schematic structural diagram of a partial refrigerant flow path of an outdoor unit of a heating, ventilation and air conditioning (HVAC) device provided according to an embodiment of the present utility model;

[0022] Figure 4 Schematically shows a connection schematic diagram of an oil separator, a refrigerant storage container and a four-way valve of an outdoor unit of a heating, ventilation and air conditioning (HVAC) device provided according to an embodiment of the present utility model;

[0023] Figure 5 Schematically shows a schematic structural diagram of an oil separator, a bypass liquid return pipeline and a bypass oil return pipeline of an outdoor unit of a heating, ventilation and air conditioning (HVAC) device provided according to an embodiment of the present utility model;

[0024] Figure 6 Schematically shows a schematic diagram of a refrigerant circulation flow path of a heating, ventilation and air conditioning (HVAC) device provided according to an embodiment of the present utility model;

[0025] Figure 7 is Figure 6 an enlarged view of part a.

[0026] The reference numerals are as follows:

[0027] 1000, outdoor unit of a heating, ventilation and air conditioning (HVAC) device;

[0028] 10, body; 11, air inlet; 12, air outlet;

[0029] 20, refrigerant storage container;

[0030] 30, oil separator;

[0031] 40, four-way valve; 41, suction port; 42, discharge port; 43, first communication port; 44, second communication port;

[0032] 50, main liquid return pipeline;

[0033] 60. Bypass liquid return pipeline; 61. Opening and closing mechanism; 62. First bending section; 63. First section; 64. Second section;

[0034] 70. Bypass oil return pipeline; 71. Second bending section; 72. Third section; 73. Fourth section;

[0035] 80. Three-way pipe; 81. Pipe body; 82. First interface; 83. Second interface; 84. Third interface;

[0036] 90. Aggregation pipeline; 100. First heat exchanger; 110. Compressor; 120. Exhaust pipe;

[0037] 2000. Indoor unit of HVAC equipment; 200. Second heat exchanger. Detailed implementation manners

[0038] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be fully conveyed to those skilled in the art.

[0039] It should be understood that the terms used herein are for the purpose of describing specific exemplary embodiments only and are not intended to be limiting. Unless otherwise clearly specified in the context, the singular forms "a", "an" and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing" and "having" are inclusive and thus specify the presence of the stated features, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, steps, operations, elements, components, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the particular order described or illustrated, unless the execution order is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0040] Although terms such as first, second, and third may be used in the text to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first" and "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer, or section discussed below may be referred to as the second element, component, region, layer, or section without departing from the teachings of the exemplary embodiments.

[0041] For ease of description, spatial relative relationship terms may be used in the text to describe the relationship of one element or feature shown in the figure to another element or feature, such as "inside", "outside", "inner side", "outer side", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation other than the orientations depicted in the figure. For example, if the device in the figure is flipped, an element described as "below" or "beneath" other elements or features will then be oriented as "above" or "over" other elements or features. Thus, the exemplary term "below" can include both upward and downward orientations. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used in the text are interpreted accordingly.

[0042] Combined with the attached Figures 1-4 As shown, this embodiment provides an outdoor unit 1000 of a heating, ventilation, and air conditioning (HVAC) device, including functional structures such as a body 10, a refrigerant storage container 20, an oil separator 30, a four-way valve 40, a main liquid return pipeline 50, a bypass liquid return pipeline 60, a bypass oil return pipeline 70, a collection pipeline 90, a first heat exchanger 100, a compressor 110, etc.

[0043] It should be noted that the attached Figure 1 of this embodiment only shows the external structure of the body 10, and the attached Figure 2 shows the internal structures of the first heat exchanger 100, the compressor 110, and the above-mentioned refrigerant storage container 20, oil separator 30, four-way valve 40, main liquid return pipeline 50, bypass liquid return pipeline 60, bypass oil return pipeline 70, and collection pipeline 90, etc. The attached Figure 3 and the attached Figure 4 both show Figure 2 part of the structures in

[0044] One side panel of the body 10 of this embodiment is provided with an air inlet 11, and the other side panel is provided with an air outlet 12 to realize the air intake and exhaust of the outdoor unit 1000 of the HVAC equipment. What is marked in the figure can be the air inlet 11 or the air outlet 12. An accommodation cavity is provided inside the body 10. Functional structures such as the refrigerant storage container 20, the oil separator 30, the four-way valve 40, the main liquid return pipeline 50, the three-way pipe 80, the bypass liquid return pipeline 60, the bypass oil return pipeline 70, and the collecting pipeline 90 of this embodiment are all located in the accommodation cavity.

[0045] The refrigerant storage container 20 can be understood as the low-pressure tank of the outdoor unit 1000 of the HVAC equipment. The functions of the refrigerant storage container 20 include refrigerant storage, safety control, connection and adjustment, etc. Specifically, the refrigerant storage container 20 is a temporary storage device for storing the remaining or spare part of the refrigerant under different operating states. Moreover, the refrigerant storage container 20 can help regulate and maintain the pressure and fluidity of the refrigerant, ensuring the stability and safety of the system during operation. In addition, the refrigerant storage container 20 is usually connected to other refrigeration system components through pipelines, and the flow and distribution of the refrigerant are controlled through internal valves or regulating devices. The refrigerant storage container 20 is generally made of pressure-resistant materials to withstand the pressure and temperature changes of the refrigerant. In some embodiments, the refrigerant storage container 20 may also include a gas-liquid separation device to achieve the gas-liquid separation function.

[0046] The main liquid return pipeline 50 is mainly used for the liquid return of the refrigerant storage container 20. One end of the main liquid return pipeline 50 is connected to the refrigerant storage container 20, and the other end is connected to the gas return interface 41 of the four-way valve 40. The main liquid return pipeline 50 is a low-pressure pipe. The low-pressure refrigerant located inside the four-way valve 40 can sequentially pass through the main liquid return pipeline 50 and the refrigerant storage container 20 and then return to the compressor 110 for compression again.

[0047] The collecting pipeline 90 is used to connect the bypass liquid return pipeline 60 and the bypass oil return pipeline 70 in parallel. The collecting pipeline 90 can be regarded as the common part or a separate part of the bypass liquid return pipeline 60 and the bypass oil return pipeline 70. One end of the collecting pipeline 90 is connected to the main liquid return pipeline 50.

[0048] One end of the bypass liquid return pipeline 60 is connected to the other end of the aggregation pipeline 90. The other end of the bypass liquid return pipeline 60 is connected to the exhaust interface 42 of the four-way valve 40 through the exhaust pipe 120. The exhaust pipe 120 is the main pipeline connecting the compressor 110 and the four-way valve 40. The oil separator 30 is arranged on the exhaust pipe 120. A part of the refrigerant separated by the oil separator 30 enters the exhaust pipe 120 of the four-way valve 40. The exhaust pipe 120 can be understood as the high-pressure pipe (D pipe) of the four-way valve 40. A part of the refrigerant separated by the oil separator 30 enters the bypass liquid return pipeline 60 of this embodiment, and then after passing through the aggregation pipeline 90, it finally returns to the main liquid return pipeline 50. The connection mode between one end of the bypass liquid return pipeline 60 and the other end of the aggregation pipeline 90 can be a direct connection or a connection through the following three-way pipe 80.

[0049] The bypass oil return pipeline 70 can be a capillary tube. One end of the bypass oil return pipeline 70 is connected to the oil separator 30, and the other end is connected to the aggregation pipeline 90. The bypass oil return pipeline 70 is used to receive the lubricating oil separated by the oil separator 30, and then convey the lubricating oil back to the main liquid return pipeline 50 through the bypass oil return pipeline 70 and the aggregation pipeline 90 in sequence. Similarly, the connection mode between one end of the bypass oil return pipeline 70 and the other end of the aggregation pipeline 90 can be a direct connection or a connection through the following three-way pipe 80.

[0050] When the bypass liquid return pipeline 60 and the bypass oil return pipeline 70 are directly connected to the aggregation pipeline 90 respectively (that is, not connected through the following three-way pipe 80), one side of the end of the bypass liquid return pipeline 60 is connected to the aggregation pipeline 90, and the other side of the end of the bypass oil return pipeline 70 is connected to the aggregation pipeline 90. Or, a small section of the end of the bypass liquid return pipeline 60 is directly connected to a small section of the end of the aggregation pipeline 90, and a small section of the end of the bypass oil return pipeline 70 is directly connected to another small section of the end of the aggregation pipeline 90 (this implementation mode is not shown in the figure).

[0051] Combined with the above structural description, it can be seen that compared with the related technology in which two interfaces are set on the main liquid return pipeline 50 to connect the bypass liquid return pipeline 60 and the bypass oil return pipeline 70 respectively, the bypass liquid return pipeline 60 and the bypass oil return pipeline 70, which were originally connected to the main liquid return pipeline 50 through interfaces respectively, are designed to be connected in parallel through the aggregation pipeline 90. The aggregation pipeline 90 serves as the common liquid return pipeline for the bypass liquid return pipeline 60 and the bypass oil return pipeline 70. Therefore, only one interface communicating with the aggregation pipeline 90 needs to be opened on the main liquid return pipeline 50, reducing the number of interfaces opened on the main liquid return pipeline 50, which can reduce the length of the main liquid return pipeline 50, thereby reducing the space occupied by it in the body 10, and can also reduce the processing and assembly difficulty and the production cost.

[0052] In addition, since the refrigerant in the bypass liquid return pipeline 60 and the bypass oil return pipeline 70 both flows from the high-pressure side (the oil separator 30 side in 6) of the outdoor unit 1000 of the HVAC equipment to the low-pressure side ( Figure 6 the main liquid return pipeline 50 in

[0053] It should be noted that the "high pressure" and "low pressure" mentioned in this embodiment refer to the pressure in the pipeline. The pressure range of high pressure can be between dozens to hundreds of pascals (Pa) to several hundred kilopascals (kPa), and the low pressure can be between dozens of kilopascals to several hundred kilopascals. The specific range depends on the design pressure of the air conditioning system and the type of refrigerant used. For example, for common refrigerants, the high-pressure range may be between 3000 kPa (3 MPa) and 4500 kPa (4.5 MPa), and the low-pressure range can be between 300 kPa (0.3 MPa) and 700 kPa (0.7 MPa).

[0054] Combined with the attached Figures 3-7 As shown in the figure, in order to facilitate the connection of the bypass liquid return pipeline 60 and the bypass oil return pipeline 70 to the aggregation pipeline 90 respectively, the outdoor unit 1000 of the HVAC equipment in this embodiment further includes a three-way pipe 80. The three-way pipe 80 can be in a T shape. The three-way pipe 80 includes a pipe body 81 and a first interface 82, a second interface 83 and a third interface 84 that are opened on the pipe body 81 and are interconnected. Among them, the first interface 82 is a refrigerant outlet, and the second interface 83 and the third interface 84 are refrigerant inlets. The three-way pipe 80 can be made of metal (such as stainless steel, carbon steel, copper) or plastic (such as PVC, PP) to meet the requirements of different fluids and environmental conditions.

[0055] The first interface 82 is used to connect to the aggregation pipeline 90, the second interface 83 is used to communicate with the bypass liquid return pipeline 60, and the third interface 84 is used to communicate with the bypass oil return pipeline 70. The refrigerant in the bypass liquid return pipeline 60 can enter the three-way pipe 80 from the second interface 83, and then return to the main liquid return pipeline 50 via the first interface 82 and the aggregation pipeline 90 in sequence. The lubricating oil in the bypass oil return pipeline 70 can enter the three-way pipe 80 from the third interface 84, and then return to the main liquid return pipeline 50 via the first interface 82 and the aggregation pipeline 90 in sequence.

[0056] Of course, in addition to connecting the bypass liquid return pipeline 60 and the bypass oil return pipeline 70 through the three-way pipe 80 as described above, other bypass pipelines (not shown in the figure) can also be directly connected to the aggregation pipeline 90. At this time, the three-way pipe 80 can be replaced by a four-way or five-way pipe, etc.

[0057] Combined with the attached Figure 5 and the attached Figure 6As shown, in some examples, optionally, the outdoor unit 1000 of the HVAC equipment further includes an opening and closing mechanism 61. The opening and closing mechanism 61 is disposed on the bypass liquid return pipeline 60, or the opening and closing mechanism 61 is disposed at the second interface 83 of the three-way valve. For example Figure 6 As shown in Figure 6 , the opening and closing mechanism 61 of this embodiment is connected to the bypass liquid return pipeline 60. The opening and closing mechanism 61 is used to close the bypass liquid return pipeline 60 to shut off the circulation of the refrigerant between the bypass liquid return pipeline 60 and the second interface 83.

[0058] When the opening and closing mechanism 61 shuts off the circulation of the refrigerant between the bypass liquid return pipeline 60 and the second interface 83, the bypass liquid return pipeline 60 cannot deliver the refrigerant to the main liquid return pipeline 50. At this time, the collecting pipeline 90 only conveys the lubricating oil in the bypass oil return pipeline 70.

[0059] There are various structural forms of the opening and closing mechanism 61 in this embodiment. For example, the opening and closing mechanism 61 can be an electromagnetic valve, a manual valve (such as a ball valve, a gate valve, a cock valve), a pneumatic valve (controlled by a pneumatic actuator), a hydraulic valve, and a mechanical switch (such as a rotary door, a piston valve), etc.

[0060] In this embodiment, an electromagnetic valve is used as the opening and closing mechanism 61. The electromagnetic valve is a structure that controls the opening and closing of the valve through electromagnetic force, and it has advantages such as fast response speed and can accurately control the flow rate and pressure.

[0061] In addition, since there are many pipelines in the outdoor unit 1000 of the HVAC equipment, it is necessary to fix pipelines such as the above-mentioned bypass liquid return pipeline 60 and bypass oil return pipeline 70. Therefore, this embodiment also improves the structures of pipelines such as the bypass liquid return pipeline 60 and bypass oil return pipeline 70.

[0062] Combined with Fig. Figure 4 and Fig. Figure 5 As shown, in some examples, optionally, the bypass liquid return pipeline 60 of this embodiment is bent and formed into a first bending section 62 with a closed shape. The shape of the first bending section 62 can be circular, elliptical, rectangular, triangular, etc., as long as it can form a closed structure.

[0063] Both sides of the first bending section 62 are provided with a first section 63 and a second section 64. Both the first section 63 and the second section 64 can be straight sections or curved sections. The connection formed between the first bending section 62 and the first section 63 intersects with the connection formed between the first bending section 62 and the second section 64.

[0064] A first connecting piece (not shown in the figure) capable of connecting the first bending section 62 can be provided on the body 10 or other structures (such as the exhaust pipe 120). Through the first bending section 62 and the first connecting piece, the bypass liquid return pipeline 60 can be directly fixed to structures such as the body 10 or the exhaust pipe 120.

[0065] The connection mode between the first connecting piece and the first bending section 62 can be direct insertion, or the first bending section 62 can be hung on the first connecting piece. It can also be designed that the first connecting piece includes a first binding band, and the first binding band is respectively sleeved on the first bending section 62 and the exhaust pipe 120 to bind the first bending section 62 of this embodiment to the exhaust pipe 120, so as to fix the bypass liquid return pipeline 60.

[0066] Similarly, the bypass oil return pipeline 70 of this embodiment can be bent into a second bending section 71 with a closed shape. The shape of the second bending section 71 can also be circular, elliptical, rectangular, triangular, etc., as long as it can form a closed structure.

[0067] On both sides of the second bending section 71, there are a third section 72 and a fourth section 73. Both the third section 72 and the fourth section 73 can be straight sections or curved sections, and the connection formed between the second bending section 71 and the third section 72 intersects with the connection formed between the second bending section 71 and the fourth section 73.

[0068] The second bending section 71 of this embodiment can be fixed on the exhaust pipe 120. Of course, it can also be fixed on other pipelines of the machine body 10 (this implementation method is not shown in the figure). One end of the exhaust pipe 120 is used to connect to the exhaust interface 42 of the four-way valve 40, and the other end of the exhaust pipe 120 is used to connect to the oil separator 30.

[0069] Furthermore, the outdoor unit 1000 of the heating and ventilation equipment further includes a second connecting piece (not shown in the figure). One end of the second connecting piece is connected to the exhaust pipe 120, and the other end is connected to the second bending section 71.

[0070] The structure of the second connecting piece is the same as or similar to that of the aforementioned first connecting piece. For example, the second connecting piece can include a second binding band, and the second binding band is respectively sleeved on the second bending section 71 and the exhaust pipe 120 to bind and fix the bypass oil return pipeline 70 with a smaller diameter to the exhaust pipe 120 with a larger diameter.

[0071] Based on the above outdoor unit 1000 of the heating and ventilation equipment, this embodiment also proposes a heating and ventilation equipment, including the outdoor unit 1000 of the heating and ventilation equipment shown in the above technical solution. In some embodiments, the heating and ventilation equipment further includes an indoor unit 2000 of the heating and ventilation equipment. The indoor unit 2000 of the heating and ventilation equipment includes a second heat exchanger 200. The refrigerant inlet and outlet of the second heat exchanger 200 are respectively connected to the first communication port 43 and the second communication port 44 of the four-way valve 40 through pipelines, so that the second heat exchanger 200, the first heat exchanger 100, and the compressor 110 form a refrigerant circulation flow path.

[0072] For the structure of the indoor unit of the HVAC equipment and other parts of the HVAC equipment except the indoor unit and the outdoor unit 1000 of the HVAC equipment, please refer to the related art, and details will not be elaborated in this application.

[0073] The above are only the preferred specific embodiments of the present utility model, but the protection scope of the present utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed by the present utility model should be covered within the protection scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A HVAC equipment outdoor unit, characterized in that: It includes a refrigerant storage container, an oil separator, a four-way valve, a main liquid return pipeline, a collection pipeline, a bypass liquid return pipeline, a bypass oil return pipeline and a compressor; One end of the main liquid return pipeline is connected to the refrigerant storage container, and the other end of the main liquid return pipeline is connected to the return air interface of the four-way valve; The collecting pipeline has a first end and a second end, the first end is connected to the main liquid return pipeline, one end of the bypass liquid return pipeline is connected to the second end, and the other end of the bypass liquid return pipeline is connected to the exhaust interface of the four-way valve through an exhaust pipe, the exhaust pipe is a main pipeline between the compressor and the four-way valve, and the oil separator is arranged on the exhaust pipe; One end of the bypass oil return pipeline is connected to the second end, and the other end of the bypass oil return pipeline is connected to the oil separator.

2. The HVAC equipment outdoor unit according to claim 1, characterized in that: The HVAC equipment outdoor unit also includes a three-way pipe located at the second end, and the three-way pipe includes a first interface, a second interface and a third interface that are interconnected, the first interface is connected to the second end, the second interface is connected to one end of the bypass liquid return pipeline, and the third interface is connected to one end of the bypass oil return pipeline.

3. The HVAC equipment outdoor unit according to claim 2, characterized in that: The HVAC equipment outdoor unit also includes an opening and closing mechanism, which is connected to the bypass liquid return pipeline or the second interface and is used to control the connection or disconnection between the bypass liquid return pipeline and the second interface.

4. The HVAC equipment outdoor unit according to claim 3, characterized in that: The opening and closing mechanism includes a solenoid valve.

5. The HVAC equipment outdoor unit according to any one of claims 1 to 4, characterized in that: The bypass liquid return pipeline comprises a first section, a first curved section and a second section which are connected in sequence, the first curved section is arranged in a ring shape, and the connection position of the first curved section and the first section overlaps the connection position formed by the first curved section and the second section; And / or, the bypass oil return pipeline includes a third section, a second curved section and a fourth section which are connected in sequence, the second curved section is arranged in a ring shape, and the connection position of the second curved section and the third section overlaps the connection position formed by the second curved section and the fourth section.

6. The HVAC equipment outdoor unit according to claim 5, characterized in that: The HVAC equipment outdoor unit also includes a first connecting member, which connects the first curved section and the exhaust pipe.

7. The HVAC equipment outdoor unit according to claim 6, characterized in that: The first connecting member includes a first binding strap, and the first binding strap is sleeved on the first curved section and the exhaust pipe.

8. The HVAC equipment outdoor unit according to claim 5, characterized in that: The HVAC equipment outdoor unit also includes a second connecting member, which connects the exhaust pipe and the second curved section.

9. The HVAC equipment outdoor unit according to claim 8, characterized in that: The second connecting member includes a second binding belt, and the second binding belt is sleeved on the second curved section and the exhaust pipe.

10. A HVAC equipment, characterized in that: It comprises a HVAC equipment indoor unit and a HVAC equipment outdoor unit as described in any one of claims 1 to 9, wherein the HVAC equipment indoor unit and the HVAC equipment outdoor unit are connected via a pipeline.

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