Compressor integrated system, air conditioner outdoor unit and heating and ventilation equipment

Abstract

The invention belongs to the technical field of refrigeration, and particularly relates to a compressor integrated system, an air conditioner outdoor unit and heating and ventilation equipment, the compressor integrated system comprises a shell, a compressor, a compressor, a compressor, a compressor, a compressor and a compressor, the compressor body is arranged in the shell, the compressor body comprises a tank body and two compression cavities formed in the tank body, the two compression cavities are formed in the axial direction of the tank body in a spaced mode, and two air return connectors communicating with the two compression cavities correspondingly are arranged on the side wall of the tank body; one end of the first air return pipe is connected with the two air return connectors respectively, the other end of the first air return pipe extends towards the top end, one end of the second air return pipe extends out of the air return port, and the other end of the second air return pipe is located in the shell and is spaced from the end, away from the air return connectors, of the first air return pipe. According to the compressor, the flow resistance in the air return pipeline can be effectively reduced, the air return efficiency of the compressor is improved, and the cost is low.

Description

Technical Field

[0001] The present application relates to the field of refrigeration technology, and more particularly, to a compressor integrated system, an outdoor unit of an air conditioner, and a heating and ventilation device. Background Art

[0002] In the related art, the compressor system of an outdoor unit of an air conditioner includes a compressor, a low-pressure tank, a gas-liquid separator, connecting pipelines, etc. Among them, a twin-rotor compressor arranges two cylinder assemblies distributed 180 degrees on the same crankshaft, overcoming a series of problems such as capacity limitation caused by unbalanced load torque of a single-rotor compressor and poor cylinder sealing performance. The compression chambers of the cylinder assemblies are communicated with the suction joints, and refrigerant is introduced into the corresponding compression chambers through the suction pipelines respectively. However, due to the long suction pipeline between the compressor and the gas-liquid separator and the large air flow resistance, the suction efficiency of the compressor is low. Summary of the Invention

[0003] The purpose of the present application is to provide a compressor integrated system, an outdoor unit of an air conditioner, and a heating and ventilation device, which can effectively reduce the flow resistance in the suction pipeline, improve the suction efficiency of the compressor, and have a lower cost.

[0004] A first aspect of the present application proposes a compressor integrated system, including: a housing having a top end and a bottom end opposite to each other along its height direction, and a suction port is provided at the top end; a compressor body disposed in the housing, the compressor body includes a tank body and two compression chambers disposed in the tank body, the two compression chambers are spaced apart along the axial direction of the tank body, and two suction joints respectively communicated with the two compression chambers are provided on the side wall of the tank body; and a first suction pipeline and a second suction pipeline, one end of the first suction pipeline is respectively connected to the two suction joints, the other end of the first suction pipeline extends towards the top end, one end of the second suction pipeline extends out of the suction port, the other end of the second suction pipeline is located in the housing and is spaced apart from the end of the first suction pipeline far from the suction joint.

[0005] According to the compressor integrated system provided by the embodiments of the present application, by disposing the compressor body in a housing that can be used as a gas-liquid separator, the compressor body includes a tank body and two compression chambers disposed in the tank body, and two suction joints respectively communicated with the two compression chambers are provided on the side wall of the tank body. By connecting one first suction pipeline to the two suction joints respectively, the number of the first suction pipelines can be reduced. At the same time, the end of the second suction pipeline extending into the housing is disconnected and isolated from the end of the first suction pipeline far from the suction joint, so that the overall length of the suction pipeline can be shortened, thereby effectively reducing the flow resistance in the suction pipeline, improving the suction efficiency of the compressor, and reducing the manufacturing cost.

[0006] In addition, according to the compressor integrated system of the present application, the following additional technical features may also be included:

[0007] In some embodiments of the present application, two return air connectors are aligned in the axial direction of the tank body, and the first return air pipe includes a main pipe and two branch pipes arranged at one end of the main pipe, and each branch pipe is connected to a return air connector.

[0008] In some embodiments of the present application, the axial direction of the compressor body is the same as the height direction of the shell, at least part of the main pipe is arranged parallel to the axial direction of the tank body, and one end of the main pipe away from the two branch pipes is higher than the top of the tank body or is arranged flush with the top of the tank body.

[0009] In some embodiments of the present application, a connecting piece is further provided on the side wall of the tank body, and the connecting piece is connected to an end of the main pipe away from the two branch pipes.

[0010] In some embodiments of the present application, a filter assembly is provided at one end of the main pipe away from the branch pipe.

[0011] In some embodiments of the present application, the filter assembly includes a filter tube and a filter screen, the outer diameter of at least part of the filter tube is smaller than the outer diameter of the first return air pipe, the filter tube is embedded in the main pipe, and the filter screen is arranged between the filter tube and the main pipe.

[0012] In some embodiments of the present application, the filter screen includes a hemispherical screen and a tubular portion that are connected to each other, and the filter screen cooperates with one end of the filter tube through the tubular portion.

[0013] In some embodiments of the present application, an oil pool is provided on the inner side of the bottom end of the shell, and the compressor integrated system also includes an oil return capillary, one end of the oil return capillary is connected to the branch pipe, and the other end of the oil return capillary extends into the oil pool.

[0014] In some embodiments of the present application, the second air return pipe is a straight pipe or a curved pipe.

[0015] In some embodiments of the present application, in the circumferential direction of the shell, an end of the second air return pipe located inside the shell and an end of the first air return pipe away from the air return joint are staggered.

[0016] In some embodiments of the present application, the compressor integrated system also includes an exhaust pipe, an exhaust port is provided at the top of the shell, and an exhaust joint is provided at the top of the tank body. One end of the exhaust pipe is connected to the exhaust joint, and the other end of the exhaust pipe extends from the exhaust port.

[0017] A second aspect of the present application provides an air-conditioning outdoor unit, comprising a compressor integrated system according to an embodiment of the present application.

[0018] The third aspect of the present application proposes a HVAC device, including an air-conditioning indoor unit and an air-conditioning outdoor unit of an embodiment of the present application, wherein the air-conditioning outdoor unit is connected to the air-conditioning indoor unit through a pipeline.

[0019] The above description is only an overview of the technical solution of this application. In order to understand the technical means of this application more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of this application more obvious and understandable, the specific implementation manners of this application are given below. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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 this application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0021] 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 this application. Moreover, throughout the drawings, the same reference numerals are used to represent the same components. Among them:

[0022] Figure 1 is a schematic structural diagram of the compressor integration system according to an embodiment of this application;

[0023] Figure 2 is Figure 1 a partial cross-sectional view of the compressor integration system shown;

[0024] Figure 3 is Figure 1 a schematic structural diagram of the first return air pipe in the compressor integration system shown;

[0025] Figure 4 is Figure 3 a schematic structural diagram of the filter assembly in the first return air pipe shown;

[0026] Figure 5 is Figure 1 a schematic structural diagram of the compressor integration system shown with some shells omitted;

[0027] Figure 6 is Figure 1 another schematic structural diagram of the compressor integration system shown with some shells omitted;

[0028] Figure 7 is Figure 6 a top view of the compressor integration system shown;

[0029] Figure 8 is a schematic structural diagram of the outdoor unit of an air conditioner according to an embodiment of this application;

[0030] Figure 9It is a schematic diagram of the electrical structure of the heating, ventilation and air conditioning (HVAC) equipment according to an embodiment of the present application.

[0031] The reference numerals in the accompanying drawings are defined as follows:

[0032] 1000, HVAC equipment;

[0033] 100, outdoor unit of air conditioner; 10, compressor integrated system; 20, chassis; 40, outdoor heat exchanger; 50, fan;

[0034] 60, four-way valve; 61, first valve port; 62, second valve port; 63, third valve port; 64, fourth valve port;

[0035] 200, indoor unit of air conditioner; 210, indoor heat exchanger;

[0036] 1, housing; 11, suction port; 12, discharge port; 13, top end; 14, bottom end; 15, oil sump;

[0037] 2, compressor body; 21, tank body; 22, suction joint; 23, discharge joint;

[0038] 3, first suction pipe; 31, main pipe; 32, branch pipe; 321, oil hole; 33, filter assembly; 331, filter pipe; 332, filter net; a, hemispherical net; b, tubular part;

[0039] 4, second suction pipe; 5, discharge pipe; 51, first pipe section; 52, second pipe section; 53, third pipe section; 54, fourth pipe section; 55, fifth pipe section; 6, connector; 8, oil return capillary tube. Detailed implementation manners

[0040] The exemplary embodiments of the present application will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present application are shown in the drawings, it should be understood that the present application 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 application can be more thoroughly understood and the scope of the present application can be completely conveyed to those skilled in the art.

[0041] It should be understood that the terms used herein are for the purpose of describing particular example embodiments only and are not intended to be limiting. Unless the context clearly dictates otherwise, the singular forms "a", "an", and "the" as used herein may also include the plural forms. The terms "comprising", "including", "containing", and "having" are inclusive and thus specify the presence of 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 their performance in the particular order described or illustrated, unless the order of performance is expressly stated. It should also be understood that additional or alternative steps may be used.

[0042] Although the terms first, second, third, etc. may be used herein to describe multiple elements, components, regions, layers, and / or sections, these elements, components, regions, layers, and / or sections should not be limited by these terms. These terms may be used only to distinguish one element, component, region, layer, or section from another. Unless the context clearly indicates otherwise, terms such as "first", "second", and other numerical terms when used herein do not imply an order or sequence. Thus, 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 example embodiments.

[0043] For ease of description, spatial relative relationship terms may be used herein to describe the relationship of one element or feature shown in the figures to another element or feature, such as "inner", "outer", "inside", "outside", "below", "beneath", "above", "over", etc. Such spatial relative relationship terms are intended to include different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is flipped, an element described as "below" or "beneath" another element or feature will then be oriented "above" or "over" the other element or feature. Thus, the example term "below" can include both an orientation of above and below. The device may be otherwise oriented (rotated 90 degrees or in other directions) and the spatial relative relationship descriptors used herein are to be interpreted accordingly.

[0044] In the related art, the compressor system of an air conditioner outdoor unit includes a compressor, a low-pressure tank, a gas-liquid separator, connecting pipelines, etc. Among them, a twin-rotor compressor arranges two cylinder assemblies distributed 180 degrees on the same crankshaft, overcoming a series of problems such as capacity limitation and poor cylinder sealing caused by the unbalanced load torque of a single-rotor compressor. The compression chambers of the cylinder assemblies are communicated with the gas return joints, and refrigerant is introduced into the corresponding compression chambers through the gas return pipelines respectively. However, due to the long gas return pipeline between the compressor and the gas-liquid separator, the air flow resistance is large, resulting in a low gas return efficiency of the compressor.

[0045] Therefore, the embodiment of the present application provides a compressor integrated system 10, which can effectively reduce the flow resistance in the gas return pipeline, improve the gas return efficiency of the compressor, and has a relatively low cost.

[0046] Figure 1 FIG. is a schematic structural diagram of a compressor integrated system according to an embodiment of the present application. Figure 2 is Figure 1 a partial sectional view of the compressor integrated system shown.

[0047] Referring to Figure 1 and Figure 2 FIG., a compressor integrated system 10 provided by the embodiment of the present application includes a housing 1, a compressor body 2, a first gas return pipe 3, and a second gas return pipe 4.

[0048] The housing 1 has opposite top end 13 and bottom end 14 along its own height direction, and a gas return port 11 is provided at the top end 13. The housing 1 may include a separately arranged cylinder, a cover shell, and a bottom shell. The top end 13 may be the end face of the cover shell covering the cylinder, and the bottom end 14 may be the bottom face of the bottom shell covering the cylinder; the cylinder and the cover shell may also be an integral structure, and the top end 13 is the top surface of the cylinder; the cylinder and the bottom shell may also be an integral structure, and the bottom end 14 is the bottom surface of the cylinder.

[0049] The compressor body 2 is arranged in the housing 1. The compressor body 2 includes a tank body 21 and two compression chambers arranged in the tank body 21. The two compression chambers are arranged at intervals along the axial direction of the tank body 21, and two gas return joints 22 communicated with the two compression chambers respectively are arranged on the side wall of the tank body 21.

[0050] One end of the first gas return pipe 3 is respectively connected to the two gas return joints 22, the other end of the first gas return pipe 3 extends towards the top end 13, one end of the second gas return pipe 4 extends out from the gas return port 11, the other end of the second gas return pipe 4 is located in the housing 1, and is arranged at an interval from the other end of the first gas return pipe 3 away from the gas return joints 22.

[0051] In the related art, a low-pressure tank is generally used to store a refrigerant coolant with a certain volume, about 2L to 4L, and a gas-liquid separator is used to separate the gaseous refrigerant and the liquid refrigerant in the gaseous mixed refrigerant, with a volume of about 1L. In this embodiment, the housing 1 can integrate the gas-liquid separator and the low-pressure tank into one body. The compressor body 2 is placed in the housing 1, and the volume of the housing 1 is about 4L to 5L. Alternatively, the low-pressure tank is omitted, and the housing 1 is only used as a gas-liquid separator, with a volume greater than 1L and less than 5L, or the size of the volume is determined according to the use scenario, as long as the housing 1 can accommodate the compressor body 2. Thus, in the embodiment of the present application, the compressor body 2, the gas-liquid separator, the low-pressure tank and the related pipelines are integrated into the housing 1, or the compressor body 2, the gas-liquid separator and the related pipelines are integrated into the housing 1, wherein the compressor body 2 can stand upright in the housing 1, that is, the axial direction of the compressor body 2 is the same as the height direction of the housing 1; the compressor body 2 can also be placed horizontally in the housing 1, that is, the axial direction of the compressor body 2 is perpendicular to the height direction of the housing 1.

[0052] Further, the housing 1 has opposite top end 13 and bottom end 14 along its height direction, and a suction port 11 is provided at the top end 13. The compressor body 2 further includes two cylinder assemblies disposed in the cylinder body 21. The two cylinder assemblies are spaced along the axial direction of the cylinder body 21. Each cylinder assembly forms a compression chamber, and a rotor and a piston (not shown in the figure) are disposed in the compression chamber. The rotor is used to drive the piston to compress the gas to do work. Two suction joints 22 communicating with the two compression chambers respectively are provided on the side wall of the cylinder body 21. One end of the first suction pipe 3 is respectively connected to the two suction joints 22, and the other end of the first suction pipe 3 extends toward the top end 13. One end of the second suction pipe 4 extends out of the suction port 11, and the other end of the second suction pipe 4 is located in the housing 1. In this way, the low-temperature gas-liquid mixed refrigerant entering from the second suction pipe 4 of the suction port 11 is separated into gas and liquid under the action of its own gravity. Since the density of the gaseous refrigerant is less than that of the liquid refrigerant, the liquid refrigerant will fall to the bottom end 14 of the housing 1, while the low-temperature gaseous refrigerant remains at the top end 13 of the housing 1. The low-temperature gaseous refrigerant is sucked into the two suction joints 22 of the first suction pipe 3 by the negative pressure of the compressor body 2 and enters the two compression chambers in the compressor body 2. The two compression chambers alternately compress the gaseous refrigerant to generate high-temperature and high-pressure gaseous refrigerant, reducing the possibility of air robbing in the two compression chambers and improving the energy efficiency of the compressor body 2.

[0053] Since one end of the first return air pipe 3 is respectively connected to two return air connectors 22, compared with the technical solution in the related art where two first return air pipes 3 are matched with two return air connectors 22, the number of return air pipelines is reduced; one end of the second return air pipe 4 extends out from the return air port 11, and the other end of the second return air pipe 4 is located inside the housing 1 and is arranged at an interval from the end of the first return air pipe 3 far away from the return air connector 22, that is, the first return air pipe 3 and the second return air pipe 4 are separately arranged and isolated from each other, so that the overall length of the return air pipeline can be shortened. The reduction in the number of return air pipelines and the shortening of the overall length of the return air pipeline can effectively reduce the flow resistance in the return air pipeline, improve the return air efficiency of the compressor, and the cost is relatively low.

[0054] In addition, since the first return air pipe 3 and the second return air pipe 4 are separately arranged and isolated from each other, the inertial force and inertial moment of the high-speed rotation of the compressor body 2 during operation cause vibration of the compressor body 2, and the vibration is transmitted to the first return air pipe 3, so that the vibration between the compressor body 2 and the first return air pipe 3 gradually dissipates and attenuates in the housing 1 and will not be transmitted to the second return air pipe 4 connected to the housing 1, thereby greatly reducing the low-frequency vibration and noise and improving the user's listening experience.

[0055] Figure 3 For Figure 1 the structural schematic diagram of the first return air pipe in the compressor integrated system shown.

[0056] In some embodiments, the two return air connectors 22 are arranged axially aligned on the tank body 21. The first return air pipe 3 includes a main pipe 31 and two branch pipes 32 arranged at one end of the main pipe 31, and each branch pipe 32 is connected to a return air connector 22.

[0057] As Figure 2 and Figure 3 shown, the two return air connectors 22 are arranged axially aligned on the tank body 21. The shape of the first return air pipe 3 is similar to the letter "F", which includes a main pipe 31 and two branch pipes 32 arranged at one end of the main pipe 31. The two branch pipes 32 are arranged on the same side and are respectively communicated with a return air connector 22, which can shorten the length of the branch pipes 32, further reduce the flow resistance in the return air pipeline, so that the gas inhaled from the port of the main pipe 31 flows into the two branch pipes 32 respectively, enters the respective corresponding compression chambers through the two return air connectors 22, and compresses the low-temperature and low-pressure gaseous refrigerant inhaled from the return air connector 22 into a high-temperature and high-pressure gaseous refrigerant through the compression work of the cylinder assembly, and discharges the high-temperature and high-pressure gaseous refrigerant.

[0058] In some embodiments, the axial direction of the compressor body 2 is the same as the height direction of the housing 1. At least part of the main pipe 31 is arranged parallel to the axial direction of the tank body 21, and the end of the main pipe 31 far away from the two branch pipes 32 is higher than the top of the tank body 21 or is flush with the top of the tank body 21.

[0059] As Figure 3 shown, both the housing 1 and the compressor body 2 are cylindrical. The compressor body 2 stands upright inside the housing 1, that is, the axial direction of the compressor body 2 is arranged in the same direction as the height direction of the housing 1. The top of the tank body 21 is close to one side of the top end 13 of the housing 1. A gas return joint 22 is provided on the side of the tank body 21 close to the bottom end 14 of the housing 1. The branch pipe 32 is communicated with the gas return joint 22. In one example, one end of the main pipe 31 is communicated with the branch pipe 32, and the whole of the main pipe 3 is arranged parallel to the axial direction of the tank body 21. In another example, the main pipe 31 includes a first part and a second part. One end of the first part is communicated with the branch pipe 32. The other end of the first part inclines towards the side wall of the tank body 21, and the second part is arranged parallel to the axial direction of the tank body 21. Such an arrangement can increase the space between the tank body 21 and the inner wall of the housing 1 as much as possible, reserve enough moving space for the first gas return pipe 3, and reduce the possibility of collision between the first gas return pipe 3 and the housing 1.

[0060] The end of the main pipe 31 far from the branch pipe 32 is a gas return end, and the gas return end extends towards the top end 13 of the housing 1. The gas return end is higher than the top of the tank body 21 or flush with the top of the tank body 21, which can ensure that the gas return end is located in the gaseous refrigerant separated from the gas-liquid mixed refrigerant, facilitating the suction of the gaseous refrigerant into the compressor body 2 by the negative pressure of the compressor body 2. In addition, after the compressor integrated system 10 is assembled, it is necessary to conduct a sealing leak detection test on the compressor body 2. The end of the main pipe 31 far from the two branch pipes 32 is higher than the top of the tank body 21 or flush with the top of the tank body 21, which is convenient for quickly extending the joints related to the leak detection test into the housing 1 to connect with the gas return end.

[0061] In some embodiments, a connecting member 6 is further provided on the side wall of the tank body 21, and the connecting member 6 is connected to the end of the main pipe 31 of the first gas return pipe 3 far from the two branch pipes 32.

[0062] As Figure 2 shown, a connecting member 6 can be provided on the side of the tank body 21. One end of the connecting member 6 is connected to the outer peripheral surface of the tank body 21, and the other end of the connecting member 6 is connected to the outer periphery of the end of the main pipe 31 of the first gas return pipe 3 far from the gas return joint 22, reducing the vibration of the first gas return pipe 3 and reducing the noise. The shape of the connecting member 6 is not limited as long as it can fix the main pipe 31 of the first gas return pipe 3. One end of the connecting member 6 can be welded to the side of the tank body 21, or one end of the connecting member 6 can be connected to the side of the tank body 21 through fasteners such as screws and pins. The threaded holes or pin holes of the tank body 21 are blind holes to ensure the airtightness of the tank body 21.

[0063] In some embodiments, a filtering assembly 33 is provided at one end of the main pipe 31 away from the branch pipe 32. After the gas-liquid mixed refrigerant entering from the suction port 11 is separated, some debris and other impurities may be mixed in the separated gaseous refrigerant. If it is sucked into the first suction pipe 3, it may block the suction joint 22, increase the flow resistance in the suction pipe, and reduce the suction efficiency of the compressor body 2. The filtering assembly 33 can filter out the impurities in the gaseous refrigerant about to enter the first suction pipe 3, reduce the flow resistance in the suction pipe, and improve the suction efficiency of the compressor body 2.

[0064] Figure 4 For Figure 3 The structural schematic diagram of the filtering assembly in the first suction pipe shown.

[0065] In some embodiments, the filtering assembly 33 includes a filter pipe 331 and a filter net 332. The outer diameter of at least a part of the filter pipe 331 is smaller than the outer diameter of the main pipe 31. One end of the filter pipe 331 is embedded in the main pipe 31, and the filter net 332 is located between the filter pipe 331 and the main pipe 31.

[0066] As Figure 4 shown, one end of the filter pipe 331 is provided with a reduced diameter opening. The outer diameter of the reduced diameter opening is smaller than the outer diameter of the main pipe 31, and the filter net 332 is relatively thin. The filter net 332 is sleeved on the reduced diameter opening, and then the reduced diameter opening is embedded in the main pipe 31. The negative pressure effect during the operation of the compressor body 2 can increase the frictional resistance between the filtering assembly 33 and the main pipe 31, prevent the filtering assembly 33 from falling off the main pipe 31, and at the same time facilitate the disassembly of the filtering assembly 33 when the compressor body 2 is shut down.

[0067] In some embodiments, the filter net 332 includes a hemispherical net a and a tubular part b connected to each other. The filter net 332 is matched with one end of the filter pipe 331 through the tubular part b.

[0068] As Figure 4 shown, the filter net 332 includes a hemispherical net a and a tubular part b connected to each other. The hemispherical net a and the tubular part b may both be provided with mesh holes, or only the hemispherical net a is provided with a plurality of mesh holes, and the tubular part b is a thin-walled pipe. The tubular part b is used to cooperate with the filter pipe 331. The hemispherical net a can increase the filtering area of the filter net 332 and improve the filtering effect of the filtering assembly 33.

[0069] Figure 5 For Figure 1 The structural schematic diagram of a kind of compressor integrated system with part of the housing omitted shown.

[0070] In some embodiments, an oil sump 15 is provided inside the bottom end 14 of the housing 1. The compressor integrated system 10 further includes an oil return capillary 8. One end of the oil return capillary 8 is communicated with the branch pipe 32, and the other end of the oil return capillary 8 extends into the oil sump 15.

[0071] As Figure 5 shown, an oil sump 15 is provided at the bottom end 14 of the housing 1, and the engine oil in the oil sump 15 is used to lubricate components such as the rotor of the cylinder assembly. During the process of discharging high-temperature and high-pressure gaseous refrigerant by the compressor body 2, inevitably, part of the mist-like engine oil is carried away, resulting in a reduction in the engine oil in the compressor body 2. If there is too much engine oil in the refrigerant in the circulation loop, it may cause a decrease in the refrigeration capacity of the system. For this reason, in this embodiment, two oil return capillary tubes 8 are added, and oil holes 321 are respectively provided on two branch pipes 32. One end of the oil return capillary tube 8 is connected to the oil hole 321 of a branch pipe 32, and the other end of the oil return capillary tube 8 extends into the oil sump 15 at the bottom end 14 of the housing 1. In this way, in the gas-liquid mixed refrigerant entering from the second return air pipe 4, the density of the engine oil is greater than that of the liquid refrigerant, and the density of the liquid refrigerant is greater than that of the gaseous refrigerant. Therefore, the refrigerant will be stratified under the action of its own gravity to separate the engine oil, liquid refrigerant and gaseous refrigerant, and the engine oil will fall into the oil sump 15 at the bottom layer of the housing 1. The oil return capillary tube 8 can introduce the engine oil in the oil sump into the compressor body 2 through the branch pipe 32 for oil replenishment, realizing the recycling of the engine oil. The diameter of the oil return capillary tube 8 is generally 0.5 mm to 1.5 mm. Compared with the related art where an oil return device is added separately, the oil return capillary tube 8 reduces the manufacturing cost while realizing the oil separation function and improves the integration degree of the system.

[0072] Figure 6 For Figure 1 shown in the compressor integrated system, another structural schematic diagram with part of the housing omitted.

[0073] In some embodiments, the second return air pipe 4 is a straight pipe or a bent pipe.

[0074] The second return air pipe 4 can be a straight pipe, with a simple structure. The second return air pipe 4 can also be a bent pipe. Exemplarily, as Figure 6 shown, the second return air pipe 4 is an L-shaped pipe. One end of the second return air pipe 4 extends out from the air return port 11, and the other end of the second return air pipe 4 is located inside the housing 1 and extends towards the inner wall of the housing 1. In this way, when the gas-liquid mixed refrigerant entering from the second return air pipe 4 enters the inner cavity of the housing 1, the movement in the vertical direction changes to the tangential movement along the side wall of the housing 1, so that a vortex is quickly formed in the inner cavity of the housing 1. Under the action of the centrifugal force, the liquid refrigerant with a larger density will be thrown to the inner wall of the housing 1, while the gaseous refrigerant with a smaller density will float inside the top end 13 of the housing 1, improving the efficiency of gas-liquid separation.

[0075] Figure 7 For Figure 6 shown in the top view of the compressor integrated system.

[0076] In some embodiments, in the circumferential direction of the housing 1, one end of the second return air pipe 4 located inside the housing 1 is staggeredly arranged with respect to the end of the first return air pipe 3 away from the return air joint 22.

[0077] Refer to Figure 6 and Figure 7 , the low-temperature gas-liquid mixed refrigerant entering the housing 1 from the second return air pipe 4 contains liquid refrigerant. One end of the second return air pipe 4 located inside the housing 1 is staggeredly arranged rather than directly opposite to the return air end of the first return air pipe 3, which can prevent the liquid refrigerant from entering the first return air pipe 3 from the return air end under the action of its own gravity, and reduce the possibility of liquid hammer problems occurring in the compressor body 2. Exemplarily, a first connection line is formed between one end of the second return air pipe 4 located inside the housing 1 and the central axis of the housing 1, and a second connection line is formed between the return air end of the first return air pipe 3 and the central axis of the housing 1. The first connection line and the second connection line are arranged at a preset angle θ. The larger the preset angle θ, the larger the stagger angle between one end of the second return air pipe 4 located inside the housing 1 and the return air end of the first return air pipe 3. When the preset angle θ = 180°, the possibility of liquid hammer problems occurring in the compressor body 2 is the smallest.

[0078] In some embodiments, the compressor integrated system 10 further includes an exhaust pipe 5. An exhaust port 12 is further provided at the top end 13 of the housing 1, and an exhaust joint 23 is further provided at the top of the tank body 21. One end of the exhaust pipe 5 is connected to the exhaust joint 23, and the other end of the exhaust pipe 5 extends out from the exhaust port 12.

[0079] The structural form of the exhaust pipe 5 is not limited. It can be a straight pipe or a bent pipe. The position where the exhaust pipe 5 is connected to the exhaust joint 23 or other pipelines can be a rigid pipe, and the rest is a metal braided mesh hose. The exhaust pipe 5 can also be entirely a metal braided mesh hose. The metal braided mesh can be woven into a mesh structure by metal wires of stainless steel, aluminum or other alloys. Combining the characteristics of metal materials and the advantages of the woven structure, it has excellent high-temperature resistance and corrosion resistance. Through a multi-directional weaving process (such as hexagonal mesh holes), while maintaining the compressive strength (MPa level), it has significant flexibility. Metal wires with a high elastic modulus can absorb energy through small deformations during vibration, reducing the risk of solder joint fatigue. After actual product verification, the metal braided mesh hose is still intact after 100,000 vibration cycles.

[0080] The exhaust pipe 5 can also be a rubber hose, and its material can include nitrile rubber (NBR), ethylene propylene diene monomer rubber (EPDM), fluororubber (FKM), chloroprene rubber (CR), etc. It is light in weight and good in flexibility, and can better absorb vibration energy. Among them, nitrile rubber and fluororubber have excellent oil resistance as the exhaust pipe 5, but the cost is relatively high; while ethylene propylene diene monomer rubber and chloroprene rubber have limited oil resistance due to their own properties and are not as good as the former two. There may be a risk of leakage during long-term use, and the cost is relatively low. Since in this embodiment, the compressor body 2 and the exhaust pipe 5 are both placed in the housing 1, even if there is a problem of refrigerant leakage in the exhaust pipe 5, the refrigerant can be retained in the housing 1 and be sucked into the tank body 21 of the compressor body 2 by the return pipe and continue to be recycled, without causing waste. In actual use, a suitable rubber material can be selected according to the application occasion to eliminate the influence of vibration stress on the exhaust pipe 5 and improve the service life of the exhaust pipe 5.

[0081] Exemplarily, as Figure 5 shown, the exhaust pipe 5 is a bent pipe, its structure is flexible, and the material can be a metal pipe. While reducing the vibration stress, it can also have a certain structural strength to prevent being scratched during transportation or use and affecting the service life. For example, the exhaust pipe 5 can be a copper pipe, and the copper pipe has good welding performance, which is convenient for connecting with other pipelines. The exhaust pipe 5 can also be a stainless steel pipe, and a copper section can be provided at the connection of both ends of the stainless steel pipe for welding connection with other pipelines.

[0082] Optionally, the exhaust pipe 5 includes a plurality of pipe segments sequentially connected in the space between the outer wall of the tank body 21 and the inner wall of the housing 1. The adjacent two pipe segments are bent at a preset angle, one of the pipe segments is connected to the exhaust joint 23, and the other pipe segment extends out from the exhaust port 12.

[0083] As Figure 5As shown in the figure, the exhaust pipe 5 has a first pipe section 51, a second pipe section 52, a third pipe section 53, a fourth pipe section 54, and a fifth pipe section 55 that are connected in sequence. The adjacent two pipe sections are bent at a 90° angle. The first pipe section 51 extends a first length toward the outer wall of the tank body 21 after being led out from the exhaust joint 23. The second pipe section 52 is bent 90° from the first pipe section 51 and extends a second length toward the bottom end 14. The third pipe section 53 is bent 90° from the second pipe section 52 and extends a third length along a direction parallel to the bottom end 14. The fourth pipe section 54 is bent 90° from the third pipe section 53 and extends a fourth length toward the top end 13, then is bent again toward the direction of the exhaust joint 23 and extends a fifth length. The fifth pipe section 55 is bent 90° from the fourth pipe section 54 and finally extends out from the exhaust port 12. Thus, the exhaust pipe 5 has high flexibility in structure. The vibration received by the exhaust pipe 5 is dissipated through the movement between each pipe section, reducing the vibration stress and increasing the service life. Since both the first pipe section 51 and the fifth pipe section 55 are directly or indirectly connected to the compressor body 2, and the tangential vibration of the compressor body 2 is relatively large during operation, the vibration stress received by the first pipe section 51 and the fifth pipe section 55 is relatively large. The first pipe section 51 and the fifth pipe section 55 can be made of copper pipes or stainless steel pipes to improve the structural strength. The remaining second pipe section 52, third pipe section 53, and fourth pipe section 54 are relatively free pipe sections and are all set as metal braided mesh hoses, which can greatly reduce the vibration stress.

[0084] Since the cost of the metal braided mesh hose is higher than that of the ordinary metal pipe, in this embodiment, a combination of the metal braided mesh hose and the ordinary metal pipe is used, which can not only reduce the vibration stress of the exhaust pipe 5 but also save the manufacturing cost.

[0085] Figure 8 It is a schematic exploded view of the outdoor unit of the air conditioner according to the embodiment of the present application. Figure 9 It is a schematic electrical structure diagram of the heating and ventilation equipment according to the embodiment of the present application.

[0086] Refer to Figure 8 , the embodiment of the present application provides an outdoor unit 100 of an air conditioner, which includes the compressor integrated system 10 of the embodiment of the present application. The outdoor unit 100 of the air conditioner further includes a chassis 20 and an outdoor heat exchanger 40, a fan 50, a four-way valve 60, and a circulation loop, etc. arranged on the chassis 20. The compressor integrated system 10 is arranged on one side of the chassis 20.

[0087] Refer to Figure 9 , the embodiment of the present application provides a heating and ventilation equipment 1000, which includes an indoor unit 200 of an air conditioner and the outdoor unit 100 of the embodiment of the present application. The outdoor unit 100 of the air conditioner is connected to the indoor unit 200 of the air conditioner through a pipeline.

[0088] The air conditioner indoor unit 200 is installed indoors, and the air conditioner outdoor unit 100 is installed outdoors. They are used for cooling or heating, and transport refrigerant through pipelines. The refrigerant exchanges heat with the indoor air and the outdoor air respectively. The air conditioner indoor unit 200 is used to transport cold air or hot air into the room to achieve the effect of cooling or heating.

[0089] like Figure 8 and Figure 9 As shown, the four-way valve 60 includes a first valve port 61, a second valve port 62, a third valve port 63 and a fourth valve port 64. The first valve port 61 is connected to the exhaust pipe 5 of the compressor body 2, the third valve port 63 is connected to the second return air pipe 4 of the compressor body 2, the second valve port 62 is connected to the inlet of the outdoor heat exchanger 40, and the fourth valve port 64 is connected to the outlet of the indoor heat exchanger 210.

[0090] Thus, the four-way valve 60 has two working states: when the four-way valve 60 is powered off, the HVAC equipment 1000 operates normally and enters the refrigeration cycle mode, at which time the first valve port 61 can be connected to the second valve port 62, and the third valve port 63 is connected to the fourth valve port 64, and the refrigerant flows in the first direction in the circulation loop. After the refrigerant is discharged from the exhaust pipe 5 of the compressor body 2, it flows to the outdoor heat exchanger 40 of the air conditioner outdoor unit 100 and the indoor heat exchanger 210 of the air conditioner outdoor unit 100 in sequence through the four-way valve 60. At this time, the outdoor heat exchanger 40 is used as a condenser to condense the high-temperature and high-pressure refrigerant discharged from the compressor body 2, and the fan 50 can improve the heat exchange efficiency of the outdoor heat exchanger 40. The indoor heat exchanger 210 is used as an evaporator, and the low-temperature refrigerant exchanges heat with the indoor air, thereby outputting cold air to the room, and then the refrigerant flows back to the compressor body 2 through the second return air pipe 4 and the first return air pipe 3.

[0091] When the four-way valve 60 is powered on, the HVAC equipment 1000 enters the defrosting cycle mode, at which time the first valve port 61 can be connected to the fourth valve port 64, and the second valve port 62 is connected to the third valve port 63, and the refrigerant flows in the second direction in the circulation loop, which is opposite to the first direction. After the refrigerant is discharged from the exhaust pipe 5 of the compressor body 2, it flows to the indoor heat exchanger 210 and the outdoor heat exchanger 40 in sequence through the four-way valve 60. At this time, the indoor heat exchanger 210 is used as a condenser, and the high-temperature and high-pressure refrigerant discharged from the exhaust pipe 5 of the compressor body 2 exchanges heat with the indoor heat exchanger 210, thereby outputting warm air to the room, and the outdoor heat exchanger 40 is used as an evaporator, and then the refrigerant flows back to the compressor body 2 through the second return air pipe 4 and the first return air pipe 3.

[0092] According to the air conditioner outdoor unit 100 and the heating and ventilation equipment 1000 provided by the embodiments of the present application, by adopting the compressor integration system 10 of the embodiments of the present application, the compressor body 2 is arranged in the housing 1 that can be used as a gas-liquid separator. The compressor body 2 includes a tank body 21 and two compression chambers arranged in the tank body 21. Two gas return joints 22 respectively communicating with the two compression chambers are arranged on the side wall of the tank body 21. By respectively connecting the two gas return joints 22 through a first gas return pipe 3, the number of the first gas return pipes 3 can be reduced. At the same time, the end of the second gas return pipe 4 extending into the housing 1 is disconnected and isolated from the end of the first gas return pipe 3 far from the gas return joint 22, so that the length of the gas return pipeline can be shortened, thereby effectively reducing the flow resistance in the gas return pipeline, improving the gas return efficiency of the compressor, and having a lower cost.

[0093] As used herein, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The phrase appears in various places in the specification and does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment mutually exclusive with other embodiments. Those skilled in the art will explicitly and implicitly understand that the embodiments described herein can be combined with other embodiments.

[0094] The above is only a preferred specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A compressor integrated system, characterized in that, Comprising: A housing having opposite top and bottom ends along its height direction, with a gas return port provided at the top end; A compressor body disposed within the housing, the compressor body including a tank and two compression chambers disposed within the tank, the two compression chambers being spaced apart along the axial direction of the tank, and two gas return connectors being provided on the side wall of the tank and respectively communicating with the two compression chambers; And A first gas return pipe and a second gas return pipe, one end of the first gas return pipe being respectively connected to the two gas return connectors, the other end of the first gas return pipe extending towards the top end, one end of the second gas return pipe extending out from the gas return port, the other end of the second gas return pipe being located within the housing and being spaced apart from the end of the first gas return pipe remote from the gas return connectors.

2. The compressor integration system according to claim 1, wherein The two gas return connectors are arranged in alignment along the axial direction of the tank, the first gas return pipe includes a main pipe and two branch pipes provided at one end of the main pipe, and each branch pipe is connected to one gas return connector.

3. The compressor integration system according to claim 2, wherein The axial direction of the compressor body is the same as the height direction of the housing, at least a part of the main pipe is arranged parallel to the axial direction of the tank, and the end of the main pipe remote from the two branch pipes is higher than the top of the tank or flush with the top of the tank.

4. The compressor integration system according to claim 2, characterized in that, A connector is further provided on the side wall of the tank, and the connector is connected to the end of the main pipe remote from the two branch pipes.

5. The compressor integration system according to claim 2, wherein A filter assembly is provided at the end of the main pipe remote from the branch pipes.

6. The compressor integration system according to claim 5, wherein, The filter assembly includes a filter pipe and a filter net, the outer diameter of at least a part of the filter pipe is smaller than the outer diameter of the main pipe, one end of the filter pipe is embedded within the main pipe, and the filter net is provided between the filter pipe and the main pipe.

7. The compressor integration system according to claim 6, characterized in that The filter net includes a hemispherical net and a tubular portion connected to each other, and the filter net is fitted with one end of the filter pipe through the tubular portion.

8. The compressor integration system according to claim 2, wherein, An oil sump is provided inside the bottom end of the housing, and the compressor integrated system further includes an oil return capillary tube, one end of the oil return capillary tube communicating with the branch pipe, and the other end of the oil return capillary tube extending into the oil sump.

9. The compressor integration system according to claim 1, wherein, The second gas return pipe is a straight pipe or a bent pipe.

10. The compressor integration system according to claim 1, wherein In the circumferential direction of the housing, the end of the second gas return pipe located within the housing is staggeredly arranged from the end of the first gas return pipe remote from the gas return connectors.

11. The compressor integration system according to any one of claims 1 to 10, characterized in that, The compressor integrated system further includes an exhaust pipe, an exhaust port is further provided at the top end of the housing, an exhaust connector is further provided at the top of the tank, one end of the exhaust pipe is connected to the exhaust connector, and the other end of the exhaust pipe extends out from the exhaust port.

12. An outdoor unit of an air conditioner, characterized in that, Including the compressor integrated system according to any one of claims 1-11.

13. A heating, ventilation and air conditioning (HVAC) device, characterized in that, Including an air conditioner indoor unit and the air conditioner outdoor unit according to claim 12, and the air conditioner outdoor unit is connected to the air conditioner indoor unit through a pipeline.

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