Compressor and vehicle

Abstract

The utility model provides a compressor and a vehicle. The compressor comprises a main shell, a cover plate contained in the main shell and a motor assembly. The cover plate divides the main shell into a first cavity and a second cavity, and the motor assembly is arranged in the second cavity; the main shell is provided with an air suction port communicated with the first cavity; the cover plate comprises an annular body and a filtering part connected with the annular body, and the first cavity and the second cavity are communicated through the filtering part; and the annular body is hermetically connected with the inner wall of the main shell. According to the compressor, the cover plate is arranged between the air suction port and the containing cavity of the motor, so that a refrigerant flowing in from the air suction port firstly passes through the filtering part and then enters the pump body through a motor gap after entering, the filtering part can filter impurities entering the compressor from a system, the impurities are prevented from entering the pump body, and meanwhile, the cover plate can be made of a material with a small heat conductivity coefficient; heat transferred to the air suction side of the compressor from the high-pressure cavity is reduced, temperature rise of refrigerants before entering a pump body is avoided, air suction superheat degree is reduced, and therefore the volume efficiency of the compressor is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a compressor and vehicle technical field, concretely relates to a compressor and vehicle. BACKGROUND

[0002] The high-low back pressure electric compressor for vehicle is the core component of the new energy automobile thermal management system, and its performance and reliability directly affect the efficiency, energy consumption and service life of the whole vehicle air conditioner refrigeration. During the operation of the compressor, the refrigerant completes the cycle compression through the pressure difference of the high-low pressure cavity, and the thermodynamic characteristics and cleanliness inside the compressor are the key factors to determine its energy efficiency and durability. However, the existing technology still faces the following two types of outstanding problems in actual application, which restricts the comprehensive performance improvement of the compressor.

[0003] Firstly, the heat conduction between the high-pressure cavity and the low-pressure cavity leads to the problem of refrigerant overheating. The high-pressure cavity and the low-pressure cavity of the current compressor are physically isolated by an intermediate partition plate made of metal material. However, the heat generated during the compression of the refrigerant in the high-pressure cavity (including friction heat and compression heat) will be conducted to the low-pressure cavity through the intermediate partition plate. Since the low-pressure cavity carries the low-temperature and low-pressure suction refrigerant, the invasion of heat causes the refrigerant to be heated before entering the pump body suction port, significantly increasing its superheat. Excessive superheat will reduce the actual compression efficiency of the refrigerant, which is manifested as a decrease in refrigeration capacity per unit mass of refrigerant, and more power needs to be consumed to achieve the target refrigeration effect; the increase of suction port refrigerant temperature leads to the increase of compressor discharge temperature, aggravating the risk of thermal aging of internal seals and lubricating oil; the system may be forced to increase the refrigerant circulation amount to balance the overheating, further increasing the compressor load and energy consumption. Although some technologies attempt to reduce heat conduction by optimizing the partition plate structure or adding a thermal insulation coating, the actual thermal insulation effect is limited due to the compact space of the compressor and the use of high-thermal-conductivity metal materials, and it is difficult to meet the heat dissipation demand under high-power working conditions.

[0004] Secondly, the problem of moving part wear caused by system impurity invasion. During the long-term operation of the compressor, impurities (such as metal abrasion, oxidation particles or residual contaminants) in the refrigeration cycle system may enter the compressor interior through the refrigerant flow. When such impurities enter the gap between the crankshaft, vane, bearing and other moving parts with lubricating oil or refrigerant, they will cause abrasive wear, which is manifested as surface scratches on key moving parts, leading to deterioration of sealing performance, increase of internal leakage and decrease of volumetric efficiency; the expansion of the friction pair gap produces abnormal vibration and noise, shortening the service life of the compressor; the secondary generation of wear particles forms a vicious cycle, accelerating the contamination and lubrication failure of the lubricating oil. Traditional solutions rely on external filtering devices to intercept impurities, but under complex working conditions (such as high-low temperature alternation and refrigerant flow rate fluctuation), the filter screen is easy to be blocked or the risk of micron-sized particles penetrating is high. In addition, if the internal flow channel design of the compressor does not fully consider the impurity deposition and discharge path, it may further aggravate the impurity retention and local wear.

[0005] It should be noted that the information disclosed in the above background section is only used to strengthen the understanding of the background of the present application, and therefore can include information that does not constitute prior art known to those skilled in the art. Content of the present application

[0006] In view of the problems in the prior art, the present application aims to provide a compressor, which is provided with a cover plate between the suction port and the motor cavity, the filter part of the cover plate can filter the impurities entering the compressor from the system, avoiding the impurities entering the inside of the pump body of the compressor, and the cover plate with a small thermal conductivity coefficient can reduce the heat transferred from the high-pressure cavity to the suction side of the compressor, avoiding the temperature of the refrigerant rising before entering the pump body, reducing the suction overheating degree and thus improving the volumetric efficiency of the compressor.

[0007] The present application provides a compressor, comprising a main shell, a cover plate accommodated in the main shell, and a motor assembly;

[0008] The cover plate divides the main shell into a first cavity and a second cavity, and the motor assembly is arranged in the second cavity;

[0009] The main shell is provided with a suction port in communication with the first cavity;

[0010] The cover plate comprises an annular body and a filter part connected to the annular body, and the first cavity and the second cavity are in communication through the filter part;

[0011] The annular body is sealingly connected to the inner wall of the main shell.

[0012] According to some examples of the present application, the filter part is located at the center of the annular body, the center of the filter part is provided with an assembly through hole, and the crankshaft of the compressor is rotatably sealed with the assembly through hole.

[0013] According to some examples of the present application, the material of the cover plate is selected from thermoplastic polymer composite or metal-based thermal insulation composite.

[0014] According to some examples of the present application, the thermoplastic polymer composite material comprises at least one of polyether ether ketone, polytetrafluoroethylene and modified derivatives thereof.

[0015] According to some examples of the present application, the cover plate is composed of a low thermal conductivity material, and the thermal conductivity λ1 of the low thermal conductivity material satisfies λ1≤(1 / 3)λ2, wherein λ2 is the thermal conductivity of the main shell.

[0016] According to some examples of the utility model, the filter part is a multistage hole array structure, and the multistage hole array structure comprises at least one through hole group.

[0017] According to some examples of the utility model, the filter part is a multistage hole array structure, and the multistage hole array structure comprises at least one through hole group.

[0018] The through hole group is a round hole group, an oval group or a waist type hole group.

[0019] According to some examples of the utility model, the filter part is a filter screen, and the mesh number of the filter screen is between 80 and 200.

[0020] According to some examples of the utility model, the cover plate further comprises a plurality of wiring covers, and the plurality of wiring covers are arranged on the side of the annular body away from the motor assembly and are configured to clamp the wiring column of the motor.

[0021] According to some examples of the utility model, the cover plate further comprises a mounting portion connected with the annular body.

[0022] The cover plate is connected with the inner wall of the main shell through the mounting portion.

[0023] The motor assembly comprises a motor and a stator support, and the cover plate is connected with the stator support through the mounting portion.

[0024] According to some examples of the utility model, the compressor further comprises a pump body shell and an intermediate shell located between the main shell and the pump body shell, the pump body assembly is arranged in the pump body shell, the cavity surrounded by the main shell and the intermediate shell is an air suction cavity, and the cavity surrounded by the intermediate shell and the pump body shell is an air exhaust cavity.

[0025] The utility model further provides a vehicle comprising the compressor.

[0026] The compressor of the utility model is provided with the cover plate with the filtering function between the air suction port and the containing cavity of the motor, so that the refrigerant flowing into the compressor from the air suction port of the compressor enters the compressor pump body through the filter part and then the motor gap, the filter part can filter the impurities entering the compressor from the system, avoids the impurities entering the inside of the compressor pump body, meanwhile, the cover plate can adopt the material with small thermal conductivity coefficient, reduces the heat transferred to the air suction side of the compressor from the high pressure cavity, avoids the refrigerant being raised in temperature before entering the pump body, reduces the suction overheating degree and thus improves the volumetric efficiency of the compressor. BRIEF DESCRIPTION OF DRAWINGS

[0027] Other features, objects and advantages of the utility model will become more apparent from the following detailed description of non-restrictive embodiments with reference to the accompanying drawings.

[0028] Figure 1 A sectional view of a compressor of an embodiment of the present application;

[0029] Figure 2 A partial structure schematic view of a compressor of an embodiment of the present application; and

[0030] Figure 3 A structure schematic view of a cover plate of an embodiment of the present application. DETAILED DESCRIPTION

[0031] Example embodiments now will be described more fully hereinafter with reference to the accompanying drawings. Example embodiments, however, can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. Embodiments described below are examples only, and are not intended to limit the present application in any way. Same reference numerals in different drawings identify same or similar elements, and explicit descriptions of these similar elements can be omitted for clarity.

[0032] In the description of the present application, it is to be understood that the terms "first", "second", "third" and the like, merely identify features being described in their respective order of appearance and are not to be construed as designating relative importance or implicit characterizations of the technical features being described. Thus, a feature defined with "first", "second", "third" or the like, can explicitly or implicitly include one or more features. In the description of the present application, the term "plurality" means two or more, unless explicitly specified otherwise.

[0033] In the description of the present application, it is to be understood that, unless specifically stated and limited otherwise, the terms "mounting", "connected", "connecting" or "linking" should not be construed as being limited to direct connection, and can be indirect connection via intermediate media, and can be mechanical or electrical connection or communication, and can be direct or indirect connection, or internal connection of two elements, or interaction between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0034] The following disclosure provides many different embodiments, or examples, for implementing different structures of the present application. For the purpose of simplifying the present application, the components and settings of specific examples are described below. Of course, they are only examples and the purpose is not to limit the present application. In addition, the present application can repeatedly refer to numbers and / or letters in different examples, and such repetition is for the purpose of simplification and clarity, which in itself does not indicate the relationship between the various embodiments and / or settings discussed. In addition, the present application provides examples of various specific processes and materials, but those skilled in the art can realize the application of other processes and / or the use of other materials.

[0035] The structure of the compressor of the present application is further described below in combination with the drawings and specific embodiments. It can be understood that each specific embodiment does not limit the protection scope of the present application.

[0036] Figure 1 And Figure 2 The cross-sectional view and the local structure schematic diagram of the compressor of an embodiment of the present application are shown in Figures 1 and 2, respectively. Specifically, the compressor comprises a main shell 1, a cover plate 2 accommodated in the main shell 1, and a motor assembly 3. Of course, the compressor further comprises a pump body shell 13 and an intermediate shell 12 between the main shell 1 and the pump body shell 13, and the pump body shell 13 accommodates a pump body assembly 4 and a crankshaft 5 therein. The main shell 1, the intermediate shell 12, and the pump body shell 13 constitute the shell of the compressor, and in some embodiments, the shell is integral. The chamber surrounded by the main shell 1 and the intermediate shell 12 is the suction chamber, and the chamber surrounded by the intermediate shell 12 and the pump body shell 13 is the exhaust chamber. The motor assembly 3 comprises a stator support 31 and a motor (stator assembly and rotor assembly), etc. The pump body assembly 4 comprises upper / lower cylinder covers, a cylinder, and an eccentric part and a roller arranged in the cylinder. The eccentric part is arranged on the crankshaft 5, and the roller is sleeved on the eccentric part. The motor drives the crankshaft 5 to rotate, and the crankshaft 5 drives the roller to rotate.

[0037] The cover plate 2 divides the main shell 1 into a first cavity A and a second cavity B. The motor assembly 3 is arranged in the second cavity B, and the second cavity B of the motor assembly 3 is in communication with the cavity of the pump body assembly 4. The main shell 1 is provided with a suction port 11 in communication with the first cavity A, and the suction port 11 is used to communicate with the evaporator.

[0038] Figure 3 The structure schematic diagram of the cover plate of an embodiment of the present application is shown in Figure 3. The cover plate 2 comprises an annular body 21 and a filter part 22 connected with the annular body 21. The first cavity A and the second cavity B are in communication through the filter part 22. The annular body 21 is sealingly connected with the inner wall of the main shell 1. In some embodiments, the annular body 21 and the inner wall of the main shell 1 can be sealingly connected through interference fit.

[0039] In some embodiments, the filter portion 22 can be located in the center of the annular body 21, and the center of the filter portion 22 is provided with a fitting through hole through which the crankshaft of the compressor passes and is rotationally sealed with the crankshaft.

[0040] The cover plate of the compressor divides the main shell 1 into a first cavity A connected with the suction port 11 and a second cavity B accommodating the motor assembly 3.

[0041] The cover plate 2 can further include a mounting portion 23 connected with the annular body 21. Figure 3 In an embodiment, the mounting portion 23 includes a plurality of support feet distributed along the outer periphery of the annular body 21, and the cover plate 2 can be sealingly connected with the inner wall of the main shell through interference fit of the mounting portion 23. Figure 3 The mounting portion 23 can be connected with the stator support 31 through slotting on the side end face of the stator support, embedding the mounting portion in the slot, or setting a buckle on the side end face of the stator support.

[0042] The cover plate 2 of the utility model is made of insulating low thermal conductivity material, and the material of the cover plate 2 can be selected from thermoplastic polymer composite material or metal-based thermal insulation composite material.

[0043] Generally, the material of the main shell of the compressor is alloy or alloy-based material, the thermal conductivity coefficient of the low thermal conductivity material used by the cover plate 2 is λ1, and λ1≤(1 / 3)λ2 is satisfied, wherein λ2 is the thermal conductivity coefficient of the main shell. The cover plate 2 is arranged in the first cavity A, and the use of material with small thermal conductivity coefficient can reduce the heat transferred from the high-pressure cavity to the suction side of the compressor, avoid the temperature rise of the refrigerant before entering the pump body, reduce the suction overheating degree, and thus improve the volumetric efficiency of the compressor. At the same time, a chamber accommodating the power board of the compressor is usually arranged on the other side of the first cavity A, and the cover plate with low thermal conductivity coefficient can avoid the heat transferred from the high-pressure cavity to the suction side of the compressor from being conducted to the power board chamber, affect the heat dissipation of the power board, and thus affect the operation of the power board.

[0044] The filter part 22 can adopt a multi-stage hole array structure, or be a filter screen directly. The filter part is a multi-stage hole array structure, which can include at least one hole group, i.e., the holes arranged therein can be of different shapes, such as a circular hole group, an elliptical hole group, or a waist-shaped hole group, etc. The sizes of the holes can also be different. The size and density of the holes determine the porosity of the filter part 22 (the ratio of the area of the holes to the total area of the filter part), which can be determined according to the specific model of the compressor or the specific working condition. In order to better play the role of filtering impurities in the refrigerant and liquid refrigerant, preferably, when the filter part 22 is a multi-stage hole array structure, Figure 3 In the embodiment, a plurality of rows of holes 221 are arranged along the radial direction of the filter part 22, and the hole diameters gradually increase or decrease along the radial direction of the filter part 22. Preferably, the porosity of the filter part 22 is between 40% and 65%, and the hole diameter gradient is distributed in the range of 0.5-2.0 mm. When the filter part is a filter screen, the mesh number of the filter screen can be between 80 and 200. Similarly, the size relationship between the filter part 22 and the annular body 21 can also be determined according to the specific model and structure of the compressor.

[0045] The cover plate 2 of the utility model can be prepared by pasting or other methods after processing each part respectively. In some embodiments, the cover plate 2 can be of an integrated structure, which can be obtained by 3D printing or other processing methods. In some other embodiments, the cover plate 2 can further include a plurality of wire covers 24, which are arranged on the side of the annular body 21 away from the motor assembly and configured to clamp a plurality of wire posts of the motor. For example, when the motor of the compressor is a three-phase motor, the plurality of wire covers 24 can support or clamp wire posts connected to U winding, V winding and W winding respectively.

[0046] The utility model further provides a vehicle, including above-mentioned compressor, the vehicle whole vehicle air conditioner has better refrigeration efficiency, energy consumption is smaller and longer service life.

[0047] Although the embodiments of the utility model have been shown and described above, it should be understood that the above embodiments are exemplary and cannot be understood as limiting the utility model. Those skilled in the art can make changes, modifications, replacements and modifications to the above embodiments within the scope of the utility model.

[0048] The above content is a further detailed description of the utility model in combination with specific preferred embodiments, and the specific implementation of the utility model cannot be limited to these descriptions. For ordinary skilled persons in the technical field to which the utility model belongs, without departing from the concept of the utility model, a number of simple deductions or replacements can be made, which should be regarded as falling within the protection scope of the utility model.

Claims

1. A compressor, characterized in that, It includes a main housing, a cover plate housed within the main housing, and a motor assembly; The cover plate divides the main housing into a first cavity and a second cavity, and the motor assembly is disposed in the second cavity; The main housing is provided with an air intake that communicates with the first cavity; The cover plate includes an annular body and a filter section connected to the annular body, and the first cavity and the second cavity are connected through the filter section; The annular body is sealed to the inner wall of the main housing.

2. The compressor according to claim 1, characterized in that, The filter section is located at the center of the annular body, and the center of the filter section is provided with an assembly through hole. The crankshaft of the compressor passes through the assembly through hole and rotates in a sealed manner with it.

3. The compressor according to claim 1, characterized in that, The material of the cover plate is selected from thermoplastic polymer-based composite materials or metal-based thermal insulation composite materials.

4. The compressor according to claim 3, characterized in that, The thermoplastic polymer-based composite material contains one of polyetheretherketone, polytetrafluoroethylene, and their modified derivatives.

5. The compressor according to claim 1, characterized in that, The cover plate is made of a material with low thermal conductivity, and the thermal conductivity λ1 of the material satisfies λ1≤(1 / 3)λ2, where λ2 is the thermal conductivity of the main shell.

6. The compressor according to claim 1, characterized in that, The filter section has a multi-level pore array structure with a porosity of 40%-65% and a pore size gradient distribution in the range of 0.5-2.0 mm.

7. The compressor according to claim 1, characterized in that, The filter section is a multi-level pore array structure, and the multi-level pore array structure includes at least one group of through holes; The through-hole group can be a round hole group, an elliptical hole group, or a waist-shaped hole group.

8. The compressor according to claim 1, characterized in that, The filtration section is a filter screen, and the mesh size of the filter screen is between 80 and 200 mesh.

9. The compressor according to claim 1, characterized in that, The cover plate also includes multiple wiring covers, which are disposed on the side of the annular body away from the motor assembly and are configured to clamp the motor's terminals.

10. The compressor according to claim 1, characterized in that, The cover plate also includes a mounting part connected to the annular body; The cover plate is connected to the inner wall of the main housing via the mounting portion; or The motor assembly includes a motor and a stator support, and the cover plate is connected to the stator support via the mounting portion.

11. The compressor according to claim 1, characterized in that, The compressor also includes a pump housing and an intermediate housing located between the main housing and the pump housing. The pump housing contains a pump assembly. The cavity formed by the main housing and the intermediate housing is an intake chamber, and the cavity formed by the intermediate housing and the pump housing is an exhaust chamber.

12. A vehicle, characterized in that, Includes the compressor as described in any one of claims 1 to 11.

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