CN218325275U - Electric compressor, air conditioning system and vehicle - Google Patents

Abstract

The utility model discloses an electric compressor, air conditioning system and vehicle, electric compressor includes: a housing assembly and a compression mechanism. The shell assembly comprises a first shell and a support, the two axial ends of the first shell are a first end and a second end respectively, the support is arranged at the first end of the first shell, so that an accommodating cavity is formed between the support and the first shell, an oil separation cavity and a refrigerant discharge port are formed in the first shell, the oil separation cavity is arranged close to the second end relative to the first end, and an oil separation outlet of the oil separation cavity is communicated with the refrigerant discharge port; compressing mechanism locates and holds the intracavity, is formed with first amortization chamber between compressing mechanism and the support, and compressing mechanism has first exhaust port, first exhaust port and first amortization chamber intercommunication, and first amortization chamber and oil divide the oil content import intercommunication in chamber. According to the utility model discloses an electric compressor can improve noise and vibration when moving, compact structure simultaneously, and the commonality is better.

Description

Electric compressor, air conditioning system and vehicle

Technical Field

The utility model belongs to the technical field of the compressor technique and specifically relates to an electric compressor, air conditioning system and vehicle are related to.

Background

The electric compressor is a core component of refrigeration equipment for vehicles, and the work of the electric compressor can generate vibration noise, influence the noise of the vehicles and cause subjective listening problems. In the related art, a high-pressure refrigerant discharged from a compression mechanism of an electric compressor is subjected to gas-liquid separation through an oil separation chamber and then leaves the electric compressor from a refrigerant discharge port, and resonance of each component in a thermal management system on a vehicle is easily excited along with exhaust airflow noise and pressure pulsation generated during operation of the electric compressor, so that the problems of vehicle noise and vibration are caused.

SUMMERY OF THE UTILITY MODEL

The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. To this end, the present invention provides an electric compressor capable of improving noise and vibration during operation.

The utility model discloses provide an air conditioning system who has above-mentioned electric compressor again.

The utility model discloses still provide a vehicle that has above-mentioned air conditioning system.

According to the utility model discloses electric compressor of first aspect includes: the shell assembly comprises a first shell and a support, the two axial ends of the first shell are respectively a first end and a second end, the support is arranged at the first end of the first shell, so that an accommodating cavity is formed between the support and the first shell, an oil distribution cavity and a refrigerant discharge port are formed in the first shell, the oil distribution cavity is arranged close to the second end relative to the first end, and an oil distribution outlet of the oil distribution cavity is communicated with the refrigerant discharge port; compressing mechanism, compressing mechanism locates hold the intracavity, compressing mechanism with be formed with first amortization chamber between the support, compressing mechanism has first exhaust port, first exhaust port with first amortization chamber intercommunication, first amortization chamber with the oil content in oil branch chamber is imported the intercommunication.

According to the utility model discloses an electric compressor can reduce electric compressor's operating noise and vibration, and space utilization in the electric compressor is higher, is favorable to reducing electric compressor's volume.

In some embodiments, the second end of the first housing is closed and the oil subchamber is formed within an end shell of the second end.

In some embodiments, a first communication passage is formed in the side case of the first housing, the first communication passage communicating the first muffling chamber with the oil separate inlet of the oil separate chamber.

Furthermore, a first communicating hole is formed in the joint of the first shell and the support, the first communicating channel is communicated with the first silencing cavity through the first communicating hole, and the flow area of the first communicating hole is smaller than that of the first communicating channel.

Specifically, the first communication hole is formed on the holder, or formed on the first housing, or defined by a cannula inserted into the first housing or the holder.

Preferably, the minimum flow area of the first through hole is S1, the volume of the first sound-deadening cavity is V1, and S1/V1 is more than or equal to 0.06 and less than or equal to 2.0.

In some embodiments, the compression mechanism has a second sound-deadening chamber therein, the second sound-deadening chamber communicating with the first sound-deadening chamber.

Further, the second silencing cavity and the first silencing cavity are arranged at intervals along the axial direction of the compression mechanism, a second communication channel is formed in the compression mechanism, and the second communication channel is communicated with the second silencing cavity and the first silencing cavity.

Preferably, the minimum flow area of the second communication channel is S2, the volume of the second sound-absorbing cavity is V2, and S2/V2 is more than or equal to 0.08 and less than or equal to 2.2.

In some embodiments, a high pressure chamber is formed between the chamber wall of the accommodating chamber and the compression mechanism, and the high pressure chamber communicates the first muffling chamber with the oil inlet of the oil sub-chamber.

Further, a second silencing chamber is arranged in the compression mechanism and communicated with the first silencing chamber, and a second communication hole is formed in the compression mechanism and communicated with the second silencing chamber and the high-pressure chamber.

In some embodiments, the compression mechanism is a rotary compression mechanism or a scroll compression mechanism.

According to the utility model discloses air conditioning system of second aspect, include according to the utility model discloses the electric compressor of any embodiment of first aspect.

According to the utility model discloses an air conditioning system, through setting up the electric compressor of above-mentioned first aspect, can reduce electric compressor's exhaust noise and vibration to reduce the holistic work noise of air conditioning system and vibration.

According to the utility model discloses vehicle of third aspect includes: the car body with carry the air conditioning system of car body, air conditioning system is according to the utility model discloses the air conditioning system of second aspect.

According to the utility model discloses a vehicle, through setting up the air conditioning system of above-mentioned second aspect, can improve because electric compressor's exhaust air current noise and pressure pulsation, the resonance problem of each part among the vehicle thermal management system that leads to improves the noise and the vibration that cause the vehicle.

Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

fig. 1 is a perspective effect view of a first housing of an electric compressor according to a first embodiment of the present invention;

fig. 2 is a cross-sectional view of the motor-driven compressor shown in fig. 1;

fig. 3 is a sectional axial view of the motor-driven compressor shown in fig. 1;

fig. 4 is a cross-sectional view of a motor-driven compressor according to a second embodiment of the present invention;

fig. 5 is a cross-sectional view of a motor-driven compressor according to a third embodiment of the present invention;

fig. 6 is a cross-sectional view of a motor-driven compressor according to a fourth embodiment of the present invention;

fig. 7 is a cross-sectional view of a motor-driven compressor according to a fifth embodiment of the present invention;

fig. 8 is a schematic view of a vehicle according to an embodiment of the present invention;

fig. 9 is a graph of S2/V2 versus pressure pulsation amplitude according to the first embodiment of the present invention.

Reference numerals:

an electric compressor 100,

A shell component 1,

A containing cavity 10, a first silencing cavity 101, a high-pressure cavity 102,

A first shell 11,

A first end 111, a second end 112,

An oil distribution cavity 113, an oil outlet 1131, an oil inlet 1132, an exhaust pipe 1133, a gas inlet and a gas outlet,

A refrigerant outlet 114,

A first communicating channel 115,

A bracket 12,

A gasket 13,

A compression mechanism 2, a first exhaust port 21, a second muffling chamber 22, a second communicating path 23 a second communication hole 24, a first cylinder 251, a second cylinder 252 a first piston 261, a second piston 262, a partition plate 27, a first bearing 281, a second bearing 282, a second exhaust port 283, a muffler 29,

A first communication hole 3, a driving shaft 4,

An air conditioning system 200,

A vehicle 300.

Detailed Description

Reference will now be made in detail to the embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and intended to be used for explaining the present invention, and should not be construed as limiting the present invention.

The following disclosure provides many different embodiments, or examples, for implementing different features of the invention. In order to simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present disclosure may repeat reference numerals and/or letters in the various examples. This repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present disclosure provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize the applicability of other processes and/or the use of other materials.

The electric compressor 100, the air conditioning system 200, and the vehicle 300 according to the embodiment of the present invention are described below with reference to the drawings.

As shown in fig. 1 to 3, an electric compressor 100 according to an embodiment of the present invention includes: the compressor comprises a shell assembly 1 and a compression mechanism 2, wherein the compression mechanism 2 is used for compressing a low-pressure refrigerant to form a high-pressure refrigerant.

The housing assembly 1 includes a first housing 11 and a bracket 12, the first end 111 and the second end 112 are respectively disposed at two axial ends of the first housing 11, the bracket 12 is disposed at the first end 111 of the first housing 11, so that an accommodating cavity 10 is formed between the bracket 12 and the first housing 11, an oil separation cavity 113 and a refrigerant discharge port 114 are formed on the first housing 11, that is, the oil separation cavity 113 and the refrigerant discharge port 114 are both integrally formed on the first housing 11.

In compressor mechanism 2 located and hold chamber 10, be formed with first noise damping chamber 101 between compressor mechanism 2 and the support 12, compressor mechanism 2 has first exhaust port 21, first exhaust port 21 and first noise damping chamber 101 intercommunication, first noise damping chamber 101 and the oily import 1132 intercommunication of oily chamber 113. The oil outlet 1131 of the oil separation chamber 113 communicates with the refrigerant outlet 114, and the oil separation chamber 113 separates gas from liquid in the high-pressure refrigerant so that the gas can be discharged from the refrigerant outlet 114.

For example, when the electric compressor 100 is powered and normally operates, a low-pressure refrigerant may be sucked, the low-pressure refrigerant is compressed by the compression mechanism 2 to form a high-pressure refrigerant, and is discharged into the first muffling chamber 101 through the first exhaust port 21 of the compression mechanism 2, the high-pressure refrigerant in the first muffling chamber 101 enters the oil sub-chamber 113 through the oil sub-inlet 1132 to implement gas-liquid separation, and the separated gaseous refrigerant is finally discharged out of the shell assembly 1 through the refrigerant discharge port 114.

The oil distribution chamber 113 is arranged close to the second end 112 relative to the first end 111, i.e. the axial distance between the oil distribution chamber 113 and the second end 112 is smaller than the axial distance between the oil distribution chamber 113 and the first end 111. Since the first muffling chamber 101 is formed by the compression mechanism 2 and the bracket 12 together, and the bracket 12 is located at the first end 111 of the first housing 11, the first muffling chamber 101 is closer to the first end 111 than to the second end 112, i.e., the axial distance between the first muffling chamber 101 and the first end 111 is smaller than the axial distance between the first muffling chamber 101 and the second end 112. Thereby, the first muffling chamber 101 is spaced from the oil separation chamber 113 at a certain axial distance on the first housing 11. Note that the axial direction of the first housing 11 is the same as the axial direction of the compression mechanism 2.

The utility model discloses electric compressor 100, oil content chamber 113 and first amortization chamber 101 have the certain distance, can increase the high pressure refrigerant and flow the flow distance to oil content chamber 113 from first amortization chamber 101 to reduce the flow noise and the pressure pulsation of high pressure refrigerant, and then reduce electric compressor 100's work noise and vibration. Meanwhile, the first muffling cavity 101 is formed between the compression mechanism 2 and the support 12, and an additional muffling component is not required to be arranged outside the first housing 11 or the support 12, so that the investment cost for arranging the muffling component can be reduced, the installation procedure of assembling the muffling component in the first housing 11 or the support 12 is omitted, the production efficiency is improved, the overall structure of the electric compressor 100 is compact, the reduction of the volume and the occupied space of the electric compressor 100 is facilitated, and the universality of the electric compressor 100 is improved. Moreover, by disposing the compression mechanism 2 in the accommodating chamber 10, the compactness of the electric compressor 100 can be further improved, the space in the electric compressor 100 can be more efficiently utilized on the premise that the volume of the electric compressor 100 is limited, and the volume and the occupied space of the electric compressor 100 can be better reduced.

Specifically, as a core component of a refrigeration apparatus for a vehicle, the size and weight of an electric compressor are strictly controlled to ensure optimal key performance such as a vehicle driving range. Within the limited size, the inner volume of the compressor is very limited, and after the space of the compression part and the motor part is met, the volume of a cavity which can be used for refrigerant buffering and noise elimination is smaller. The utility model provides an exhaust scheme can provide effectual solution for how to utilize limited volume to promote the noise reduction effect.

In some embodiments, as shown in fig. 1-3, the second end 112 of the first housing 11 is closed and the oil subchamber 113 is formed within the end casing of the second end 112. With such a configuration, the oil-dividing chamber 113 and the first muffling chamber 101 are respectively located at the second end 112 and the first end 111 of the first housing 11, and the distance between the two is large, so that the flow distance of the high-pressure refrigerant flowing from the first muffling chamber 101 to the oil-dividing chamber 113 is large, thereby reducing the flow noise and the pressure pulsation of the high-pressure refrigerant, and further reducing the operation noise and the vibration of the electric compressor 100.

Furthermore, by providing the second end 112 of the first housing 11 in a closed form, the structure of the housing assembly 1 can be simplified, and the cost and process of closing the second end 112 with other components can be eliminated. Moreover, with the oil minute chamber 113 formation in the end shell of second end 112, can avoid the too much space that holds chamber 10 that occupies of oil minute chamber 113, guarantee to hold the volume of chamber 10 enough, and improved oil minute chamber 113's setting and hold the interior compression mechanism 2 of chamber 10 and take place to interfere the scheduling problem, promote the commonality.

In some embodiments, as shown in fig. 1 and 3, a first communication channel 115 is formed in the side casing of the first housing 11, and the first communication channel 115 communicates the first sound-deadening chamber 101 with the oil inlet 1132 of the oil chamber 113. Thereby, the high-pressure refrigerant in the first muffling chamber 101 flows into the first communicating passage 115, and then flows into the oil sub-chamber 113 through the oil sub-inlet 1132. Therefore, the exhaust efficiency can be improved, and when the oil pool is arranged in the accommodating cavity 10, other adverse effects caused by unstable liquid level of the oil pool due to the fact that the first silencing cavity 101 exhausts air to the accommodating cavity 10 are avoided. In addition, in such a structure, the first communication channel 115 is formed in the side housing of the first housing 11, so that the first communication channel 115 is prevented from occupying the space of the accommodating chamber 10, and the structural strength of the first communication channel 115 is increased, and the first communication channel 115 is not easily deformed by the pressure of the high-pressure refrigerant, thereby improving the reliability of the electric compressor 100.

The forming manner of the first communicating channel 115 on the first housing 11 is not limited, for example, the first communicating channel 115 may be directly formed when the first housing 11 is cast or injection-molded, and for example, the first communicating channel 115 may be formed by punching a hole on the first housing 11. In addition, it should be noted that the first communicating channel 115 may extend along a straight line, may also extend along a curved line, and the specific extending manner is not limited.

The utility model discloses in, do not limit to the quantity of first intercommunication passageway 115, first intercommunication passageway 115 can be one, also can be a plurality of passageways that independently communicate first amortization chamber 101 and oil content chamber 113. When there are a plurality of first communication passages 115, the sum of the flow areas of all the first communication passages 115 may be set to be the same as the flow area when there is one first communication passage 115.

In some embodiments, as shown in fig. 4 and 5, a first communication hole 3 is formed at a connection point of the first housing 11 and the bracket 12, the first communication channel 115 is communicated with the first sound-deadening chamber 101 through the first communication hole 3, and an area of flow of the first communication hole 3 is smaller than an area of flow of the first communication channel 115. From this, because the area of flowing through of the refrigerant route from first amortization chamber 101 to oily chamber 113 is unchangeable to can utilize the relatively great first communicating channel 115 of area of flowing through to guarantee exhaust efficiency, utilize the relatively little first communicating hole 3 of area of flowing through simultaneously, carry out relevant size ratio design, promote noise reduction effect. In addition, in the process that the high-pressure refrigerant in the first muffling cavity 101 flows into the first communicating channel 115 through the first communicating hole 3, since the flow area is first reduced and then increased, the flow noise and the pressure pulsation of the high-pressure refrigerant in the first shell 11 are more favorably reduced, and the working noise and the vibration of the electric compressor 100 are further reduced.

It should be noted that, those skilled in the art can obtain the specific size that the flow area of the first communicating hole 3 and the first communicating channel 115 needs to be satisfied respectively according to the specific requirements of different working conditions by matching calculation, and therefore, the utility model discloses not restricting specific size.

In the present invention, the position and shape of the first communication hole 3 are not limited. For example, the first communication hole 3 may be formed on the holder 12, or formed on the first housing 11, or defined by a cannula inserted into the first housing 11 or the holder 12. Therefore, the first communication hole 3 is arranged flexibly, and can be arranged on the bracket 12 or the first shell 11 according to the structural requirements of the device, or can be arranged as an independent structure.

For example, in the example of fig. 4, the first communication hole 3 is formed on the holder 12, and the holder 12 is formed with a passage having a smaller flow area than the first communication passage 115 at the junction with the first communication passage 115, and this passage constitutes the first communication hole 3. For another example, in the example of fig. 5, the first communication hole 3 is formed on the first housing 11, and at this time, the first communication hole 3 may be provided as a passage between the first communication passage 115 and the first muffling chamber 101, and the flow area of the first communication hole 3 is smaller than the flow area of the first communication passage 115. Also for example, a gasket 13 is further disposed between the first housing 11 and the bracket 12, and in this case, the first communicating hole 3 may be a cannula disposed on the gasket 13 and corresponding to the first communicating channel 115, and the cannula may be inserted into the first communicating channel 115, or inserted into the first muffling chamber 101, or inserted into both the first communicating channel 115 and the first muffling chamber 101.

Preferably, the minimum flow area of the first communication hole 3 is S1, and the volume of the first sound-deadening chamber 101 is V1, wherein S1/V1 is 0.06. Ltoreq.S 1/2.0, for example, 0.06, 0.1, 0.5, 1, 1.5, 1.9, 2.0, etc. Under such structure, noise reduction effect is better.

It should be noted that, when the first communication channel 115 is provided in plural, the number of the first communication holes 3 may be the same as or plural than the number of the first communication channels 115, and the sum of the flow areas of the plural first communication holes 3 is S1.

In some embodiments, as shown in fig. 3, a second sound-deadening chamber 22 may be further provided in the compression mechanism 2, and the second sound-deadening chamber 22 communicates with the first sound-deadening chamber 101. From this, the high pressure refrigerant that compression mechanism 2 compression formed is arranged in first amortization chamber 101 and second amortization chamber 22, through setting up the second amortization chamber 22 with first amortization chamber 101 intercommunication, can increase the amortization chamber total volume in the electric compressor 100, the high pressure refrigerant is held in great space after being discharged in first amortization chamber 101 and the second amortization chamber 22, make the pressure of high pressure refrigerant reduce, reduce the pressure that first amortization chamber 101 and second amortization chamber 22 inner wall received, thereby reduce the flow noise and the pressure pulsation that the high pressure refrigerant caused.

In addition, the second silencing cavity 22 is arranged in the compression mechanism 2, so that other silencing parts are not additionally arranged in the accommodating cavity 10, the space utilization rate in the accommodating cavity 10 can be improved, and the electric compressor 100 has a compact structure and simultaneously realizes good noise reduction and vibration reduction effects.

For example, as shown in fig. 3, the second muffling chamber 22 and the first muffling chamber 101 are arranged at a distance from each other in the axial direction of the compression mechanism 2, and a second communicating channel 23 is formed in the compression mechanism 2, and the second communicating channel 23 communicates the second muffling chamber 22 with the first muffling chamber 101. Therefore, after the high-pressure refrigerant formed by compression of the compression mechanism 2 is discharged into the first silencing cavity 101, the high-pressure refrigerant enters the second silencing cavity 22 along the second communicating channel 23, the high-pressure refrigerant entering the second silencing cavity 22 can flow back into the first silencing cavity 101 through the second communicating channel 23, then the high-pressure refrigerant in the first silencing cavity 101 enters the oil branch cavity 113 through the oil branch inlet 1132, and the separated gaseous refrigerant is finally discharged out of the shell assembly 1 through the refrigerant discharge port 114.

Under the structure, the second silencing cavity 22 and the first silencing cavity 101 are arranged at intervals along the axial direction of the compression mechanism 2, so that a certain axial distance is reserved between the second silencing cavity 22 and the first silencing cavity 101, and a certain flowing distance is reserved between the high-pressure refrigerant in the second communicating channel 23, so that the flowing noise and the pressure pulsation of the high-pressure refrigerant can be better reduced, and the working noise and the vibration of the electric compressor 100 are reduced.

Of course, the present invention is not limited to this, for example, in other embodiments of the present invention, for example, referring to fig. 7, the compression mechanism 2 may also be provided with a second exhaust port 283, and the second exhaust port 283 may directly exhaust the air to the second muffling chamber 22, so as to improve the exhaust efficiency.

It can be understood that the flowing space of the high-pressure refrigerant in the first sound-deadening chamber 101 and the second sound-deadening chamber 22 is larger than the flow area of the second communicating channel 23, so that the flowing noise and the pressure pulsation of the high-pressure refrigerant in the first housing 11 can be further reduced in the process that the high-pressure refrigerant flows from the second sound-deadening chamber 22 to the first sound-deadening chamber 101 through the second communicating channel 23, and the operating noise and the vibration of the electric compressor 100 can be further reduced.

The utility model discloses in, do not restrict the quantity of second intercommunication passageway 23, second intercommunication passageway 23 can be one, also can be a plurality of passageways that independently communicate first amortization chamber 101 and second amortization chamber 22. It is to be added that when the second communicating path 23 is provided in plural, the sum of the flow areas of all the second communicating paths 23 is the same as the flow area when the second communicating path 23 is provided in one.

Preferably, as shown in FIG. 9, the minimum flow area of the second communicating channel 23 is S2, and the volume of the second sound-deadening chamber 22 is V2, wherein S2/V2 is 0.08. Ltoreq.S 2/2. Ltoreq.2.2, for example, 0.08, 0.1, 0.5, 1, 1.5, 1.9, 2.2, etc. With such a structure, both the exhaust efficiency and the noise reduction effect can be achieved.

Note that, when the second communicating path 23 is provided in plural, the sum of the flow areas of the plural second communicating paths 23 is S2.

Through analysis and test, the problem of pressure loss is generally considered in the conventional design scheme, and a cavity at the exhaust side of the compressor and a flow channel are designed into a large cavity and a flow channel with a large flow area, but the design is not the optimal scheme for the pulsation attenuation and the noise elimination of the refrigerant. Aiming at the operating condition and common noise problems of the electric compressor, if a specific noise frequency band is met, such as low-frequency noise which is difficult to solve, the distribution proportion of 'cavity-tube-cavity-tube' can be controlled according to the inherent flow channel topological structure of the compressor, and the proportion of the flow channel flow area to the cavity volume is preferably selected, so that the noise problems of the compressor, especially the low-frequency problems, can be improved.

The applicant finds that the attenuation characteristics of the fluid pulsation are obviously different from those of the sound wave pulsation, and the optimal effect of the fluid pulsation attenuation cannot be obtained by the acoustic plane wave transfer formula alone. The optimal proportioning range of the flow area of each flow passage and the volume of the buffer cavity can be determined by simulation combined with experimental tests.

When the motor-driven compressor 100 is used in the vehicle 300, the operation state of the motor-driven compressor 100 is affected by the operating condition of the vehicle 300. Because the attenuation characteristic of the fluid pulsation is obviously different from that of the sound wave pulsation, the data shown in fig. 9 is obtained through simulation combined with experimental tests, and the data can be obtained from fig. 9, when the vehicle is in an idle working condition, the amplitude of the pressure pulsation in the range of S2/V2 which is more than or equal to 0.08 and less than or equal to 0.8 is smaller, the attenuation and noise elimination effect of the fluid pulsation is optimal, when the vehicle is in a low-speed refrigerating working condition, the amplitude of the pressure pulsation in the range of S2/V2 which is more than or equal to 0.4 and less than or equal to 2.2 is smaller, the attenuation and noise elimination effect of the fluid pulsation is optimal, and when the vehicle is in a dehumidifying working condition, the pressure pulsation and noise reduction effect is better in the range of S2/V2 which is more than or equal to 0.08 and less than or equal to 2.2.

In some embodiments, as shown in fig. 6 and 7, a high pressure chamber 102 is formed between the chamber wall of the accommodating chamber 10 and the compression mechanism 2, and the high pressure chamber 102 communicates the first sound-deadening chamber 101 with the oil inlet 1132 of the oil chamber 113. Thereby, the high-pressure refrigerant in the first muffling chamber 101 flows into the high-pressure chamber 102, and then flows into the oil sub-chamber 113 through the oil sub-inlet 1132. Under such a structure, the high pressure chamber 102 is formed by the chamber wall of the accommodating chamber 10 and the compression mechanism 2, and it is not necessary to additionally provide a structure such as a communication conduit between the oil inlet 1132 and the first muffling chamber 101 in the first housing 11, and the structure of the electric compressor 100 can be simplified, and it is not necessary to process a communication passage between the oil inlet 1132 and the first muffling chamber 101 on the first housing 11, so that the processing difficulty of the first housing 11 is reduced, the input cost of the communication structure is reduced, and the production efficiency is improved.

It can be understood that the high pressure chamber 102 has a certain space, which can reduce the pressure of the high pressure refrigerant flowing in the high pressure chamber 102, thereby reducing the pressure pulsation generated by the high pressure refrigerant. Meanwhile, the flowing space of the high-pressure refrigerant in the first muffling chamber 101 and the high-pressure chamber 102 may be smaller than the flowing space of the high-pressure chamber 102, so that the flowing noise and pressure pulsation of the high-pressure refrigerant in the first housing 11 may be reduced, and the working noise and vibration of the electric compressor 100 may be further reduced.

Further, referring to fig. 7, the compression mechanism 2 has a second sound-deadening chamber 22 therein, the second sound-deadening chamber 22 communicating with the first sound-deadening chamber 101, and the compression mechanism 2 has a second communication hole 24 therein, the second communication hole 24 communicating the second sound-deadening chamber 22 with the high-pressure chamber 102. Therefore, the high-pressure refrigerant formed by the compression mechanism 2 is discharged into the first sound-deadening chamber 101 and then can enter the second sound-deadening chamber 22, the high-pressure refrigerant in the first sound-deadening chamber 101 can directly flow into the high-pressure chamber 102, the high-pressure refrigerant in the second sound-deadening chamber 22 flows into the high-pressure chamber 102 through the second communication hole 24, and the high-pressure refrigerant in the high-pressure chamber 102 flows into the oil-dividing chamber 113 through the oil-dividing inlet 1132. In this process, the high-pressure refrigerant flows from the second sound-deadening chamber 22 to the high-pressure chamber 102 through the second communication hole 24, and the exhaust efficiency can be improved while the noise reduction effect is ensured.

Alternatively, for example, referring to fig. 7, the compression mechanism 2 may also be provided with a second air outlet 283, and the second air outlet 283 may directly discharge air to the second sound-deadening chamber 22, thereby further improving the air discharge efficiency. In addition, the first muffling cavity 101 is communicated with the second muffling cavity 22, so that a high-pressure refrigerant can flow between the first muffling cavity 101 and the second muffling cavity 22, the air pressure of the high-pressure refrigerant in the first muffling cavity 101 and the air pressure of the high-pressure refrigerant in the second muffling cavity 22 are balanced, and the problems that the electric compressor 100 vibrates due to the pressure difference between the first muffling cavity 101 and the second muffling cavity 22 and the like can be solved.

In the present invention, the number and shape of the second communication holes 24 are not limited, and the number of the second communication holes 24 may be one or a plurality of second silencing cavities 22 and high-pressure cavities 102 that are independently communicated.

Optionally, the lower portion of the oil dividing cavity 113 has an oil return hole, and the accommodating cavity 10 may have an oil pool therein, wherein the oil return hole is communicated with the oil pool, so as to facilitate oil return, and the oil pool may be used for supplying lubricating oil to the compression mechanism 2. This can improve the compactness of the electric compressor 100.

It should be noted that the gas-liquid separation principle of the oil separation chamber 113 is not limited, for example, the oil inlet 1132 may extend along the tangential direction of the oil separation chamber 113, the refrigerant entering the oil separation chamber 113 from the oil inlet 1132 may flow along the circumferential direction, oil in the refrigerant is thrown out by centrifugal force, and the gaseous refrigerant from which the oil is separated may be discharged through the oil outlet 1131, so that the gas-liquid separation effect is good.

In this embodiment, the exhaust pipe 1133 may be further disposed in the oil dividing cavity 113, the refrigerant entering the oil dividing cavity 113 may flow along the circumferential direction at the periphery of the exhaust pipe 1133, so as to achieve a more reliable gas-liquid separation effect, and the separated gaseous refrigerant enters the exhaust pipe 1133 and is then discharged from the oil dividing outlet 1131 through the exhaust pipe 1133.

Of course, the utility model discloses be not limited to this, for example, also can set up filtration such as filter screen in oil content chamber 113, filter the fluid in the refrigerant, separate the gaseous refrigerant of fluid and can pass filtration, export 1131 through the oil content and discharge, here do not give unnecessary details.

In some embodiments, the type of the compression mechanism 2 is not limited, and may be, for example, a rotary compression mechanism or a scroll compression mechanism.

Thus, different types of compression mechanisms 2 can be used for different electric compressors 100, for example, when the electric compressor 100 is a rotary compressor, the compression mechanism 2 is a rotary compression mechanism, the compression mechanism 2 can include a cylinder, a piston, a slide sheet, and the like, and the drive shaft 4 of the motor drives the piston to roll in the cylinder. When the electric compressor 100 is a scroll compressor, the compression mechanism 2 is a scroll-type compression mechanism, and the compression mechanism 2 may include a fixed scroll, an orbiting scroll, a driving shaft driving the orbiting scroll to rotate, and the like.

It should be noted that the specific type of the electric compressor 100 is not limited, and may be, for example, a horizontal compressor whose central axis extends in a lateral direction or is slightly inclined to the horizontal line, or may also be, for example, a vertical compressor whose central axis extends in a vertical direction or is slightly inclined to the vertical line, or the like.

When the compression mechanism 2 is a rotary compression mechanism, it may be a single cylinder compression mechanism or a multi-cylinder compression mechanism. For example, in the example shown in fig. 7, the compression mechanism 2 is a two-cylinder compression mechanism including: a first bearing 281, a second bearing 282, a first cylinder 251, a second cylinder 252, a first piston 261, a second piston 262, a partition 27, and a muffler 29.

The first cylinder 251 and the second cylinder 252 are axially spaced, the first cylinder 251 is located on one side of the second cylinder 252 close to the bracket 12, the partition plate 27 is sandwiched between the first cylinder 251 and the second cylinder 252, the first bearing 281 is located on one side of the first cylinder 251 far from the partition plate 27, and the second bearing 282 is located on one side of the second cylinder 252 far from the partition plate 27.

A first compression chamber is formed among the first cylinder 251, the partition plate 27 and the first bearing 281, the first piston 261 is rollably adapted to the first compression space, the first bearing 281 is provided with a first exhaust port 21 communicated with an exhaust chamber of the first compression space, a first muffling chamber 101 is formed between the first bearing 281 and the bracket 12, and the first exhaust port 21 is communicated with the first muffling chamber 101.

A second compression chamber is formed between the second cylinder 252, the partition plate 27 and the second bearing 282, the second piston 262 is rollably fitted to the second compression space, the second bearing 282 has a second exhaust port 283 communicating with the exhaust chamber of the second compression space, the muffler 29 is provided on the side of the second bearing 282 remote from the second cylinder 252, a second muffler chamber 22 is formed between the second bearing 282 and the muffler 29, the second exhaust port 283 communicates with the second muffler chamber 22, and a second communication hole 24 communicating the second muffler chamber 22 with the housing chamber 10 is formed in the muffler 29.

The second communication passage 23 passes through the first bearing 281, the first cylinder 251, the partition plate 27, the second cylinder 252, and the second bearing 282 to communicate the first sound-deadening chamber 101 with the second sound-deadening chamber 22. This simplifies and compacts the structure of the compression mechanism 2.

According to the embodiment of the present invention, the air conditioning system 200 includes the electric compressor 100 of any one of the above embodiments. Thus, by adopting the electric compressor 100, the electric compressor 100 has a compact structure, which is advantageous for reducing the volume of the air conditioning system 200, and the exhaust noise and vibration of the electric compressor 100 can be reduced, thereby reducing the operation noise and vibration of the entire air conditioning system 200.

It should be noted that, according to the embodiment of the present invention, the specific application scenario of the air conditioning system 200 is not limited, for example, the indoor air conditioner, the indoor refrigerator, the vehicle-mounted air conditioner, etc., after the application is determined, those skilled in the art can know other components of the air conditioning system 200, for example, when the system is used for the indoor air conditioner or the indoor refrigerator, the system can further include an evaporator, a condenser, a throttling element, etc., and for example, when the system is used for the vehicle-mounted air conditioner, the system can further include at least one of an indoor condenser, an indoor evaporator, an outdoor condenser, an outdoor evaporator, and a throttling assembly, etc., which are not described herein again.

As shown in fig. 8, a vehicle 300 according to an embodiment of the present invention includes: an air conditioning system 200 mounted on a vehicle body, the air conditioning system 200 being the air conditioning system 200 of any of the embodiments described above. Since the air conditioning system 200 of any of the embodiments described above can improve the discharge noise and pressure pulsation of the electric compressor 100, when the air conditioning system 200 is used in the vehicle 300, the resonance problem of each component in the thermal management system of the vehicle 300 caused by the discharge airflow noise and pressure pulsation of the electric compressor 100 can be improved, thereby improving the noise and vibration caused to the vehicle 300.

In addition, since the volume of the air conditioning system 200 can be reduced by using the electric compressor 100, the installation position of the air conditioning system 200 in the vehicle 300 is more flexible.

It should be noted that, the specific type of the vehicle 300 according to the embodiment of the present invention is not limited, for example, the vehicle may be a new energy vehicle, and the new energy vehicle may include a pure electric vehicle, a hybrid electric vehicle, and the like, which is described herein in detail. In addition, when the type of the vehicle 300 is specifically determined, other configurations of the vehicle 300 can be known by those skilled in the art, and are not described herein.

The electric compressor 100 according to some embodiments of the present invention is described below.

First embodiment

As shown in fig. 1 to 3, an exemplary motor-driven compressor 100 is a rotary motor-driven compressor, and includes a housing assembly 1 and a compression mechanism 2. The compression mechanism 2 is configured to compress and convert a low-pressure refrigerant into a high-pressure refrigerant.

The housing member includes a first housing 11 and a bracket 12, the first end 111 and the second end 112 are respectively disposed at two axial ends of the first housing 11, the bracket 12 is disposed at the first end 111 of the first housing 11 and is matched with the first housing 11 to form the accommodating cavity 10, an oil separation cavity 113 and a refrigerant discharge port 114 are disposed at the second end 112 of the first housing 11, and an oil separation outlet 1131 of the oil separation cavity 113 is communicated with the refrigerant discharge port 114.

Further, the compression mechanism 2 in this example is a rotary type compression mechanism, the compression mechanism 2 is provided in the accommodation chamber 10, a first muffling chamber 101 is formed between the compression mechanism 2 and the bracket 12, and the first muffling chamber 101 communicates with the oil inlet 1132 of the oil chamber 113 through the first communication passage 115.

The first exhaust port 21 of the compression mechanism 2 is communicated with the first silencing cavity 101, a second silencing cavity 22 is further arranged in the compression mechanism 2, the second silencing cavity 22 and the first silencing cavity 101 are arranged at intervals along the axial direction of the compression mechanism 2, and the second silencing cavity and the first silencing cavity are communicated through a second communication channel 23. Further, the compression mechanism 2 may also have a second air outlet 283 communicating with the second sound-deadening chamber 22.

As shown in fig. 3, when the electric compressor 100 is powered to operate normally, the low-pressure refrigerant is converted into the high-pressure refrigerant in the compression mechanism 2, the high-pressure refrigerant is discharged into the first muffling chamber 101 and the second muffling chamber 22 through the first exhaust port 21 and the second exhaust port 283, the high-pressure refrigerant in the second muffling chamber 22 flows into the first muffling chamber 101 through the second communicating channel 23, then the high-pressure refrigerant in the first muffling chamber 101 flows into the oil sub-chamber 113 from the oil sub-inlet 1132 through the first communicating channel 115, and the separated gaseous refrigerant is finally discharged out of the housing assembly 1 through the refrigerant discharge port 114.

This reduces the flow noise and pressure pulsation of the high-pressure refrigerant in the housing assembly 1, thereby reducing the operation noise and vibration of the electric compressor 100.

Second embodiment

As shown in fig. 4, the second embodiment differs from the first embodiment in that: the first connecting hole 3 is formed in the connecting position of the first shell 11 and the support 12, the first connecting hole 3 is formed in the support 12, the first connecting channel 115 is communicated with the first silencing cavity 101 through the first connecting hole 3, and the flow area of the first connecting hole 3 is smaller than that of the first connecting channel 115.

Third embodiment

As shown in fig. 5, the third embodiment differs from the second embodiment described above in that: the first communication hole 3 is formed on the first housing 11.

Fourth embodiment

As shown in fig. 6, the fourth embodiment differs from the second embodiment described above in that: the first housing 11 in the present fourth embodiment does not have the first communicating channel 115 thereon.

As shown in fig. 6, in the fourth embodiment, a high pressure chamber 102 is formed between the chamber wall of the accommodating chamber 10 and the compression mechanism 2, and the high pressure chamber 102 communicates the first sound-deadening chamber 101 with the oil inlet 1132 of the oil chamber 113. Thereby, the high-pressure refrigerant in the first muffling chamber 101 flows into the high-pressure chamber 102, and then flows into the oil sub-chamber 113 through the oil sub-inlet 1132.

Fifth embodiment

As shown in fig. 7, the fifth embodiment differs from the fourth embodiment described above in that: the second sound-deadening chamber 22 communicates with the high-pressure chamber 102 through the second communication hole 24. At this time, the high-pressure refrigerant in the second muffling chamber 22 can flow to the high-pressure chamber 102 through the second communication hole 24, so that the exhaust efficiency is improved while the noise reduction effect is ensured.

In the description of the present invention, it is to be understood that the terms "central," "upper," "vertical," "lateral," "horizontal," "inner," "outer," "axial," and the like refer to orientations or positional relationships based on those illustrated in the drawings, merely for convenience and simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; they may be directly connected or indirectly connected through intervening media, or may be connected through the use of two elements or the interaction of two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. An electric compressor, comprising:

the shell assembly comprises a first shell and a support, the two axial ends of the first shell are a first end and a second end respectively, the support is arranged at the first end of the first shell, so that an accommodating cavity is formed between the support and the first shell, an oil distribution cavity and a refrigerant discharge port are formed in the first shell, the oil distribution cavity is arranged close to the second end relative to the first end, and an oil distribution outlet of the oil distribution cavity is communicated with the refrigerant discharge port;

compressing mechanism, compressing mechanism locates hold the intracavity, compressing mechanism with be formed with first amortization chamber between the support, compressing mechanism has first exhaust port, first exhaust port with first amortization chamber intercommunication, first amortization chamber with the oil branch import intercommunication in oil branch chamber.

2. The electric compressor of claim 1, wherein the second end of the first housing is closed, and the oil component chamber is formed in an end shell of the second end.

3. The motor-driven compressor according to claim 1, wherein a first communication passage is formed in a side shell of the first housing, and the first communication passage communicates the first muffling chamber with an oil branch inlet of the oil branch chamber.

4. The motor-driven compressor according to claim 3, wherein a first communication hole is provided at a junction of the first housing and the bracket, the first communication passage communicates with the first muffling chamber through the first communication hole, and an area of flow of the first communication hole is smaller than an area of flow of the first communication passage.

5. The motor-driven compressor according to claim 4, wherein the first communication hole is formed on the bracket, or formed on the first housing, or defined by a cannula inserted into the first housing or the bracket.

6. The motor-driven compressor according to claim 4, wherein the first communication hole has a minimum flow area of S1 and the first muffling chamber has a volume of V1, wherein S1/V1 is 0.06. Ltoreq.S 1.ltoreq.2.0.

7. The motor-driven compressor of claim 1, wherein the compression mechanism has a second muffling chamber therein, the second muffling chamber being in communication with the first muffling chamber.

8. The motor-driven compressor according to claim 7, wherein the second muffling chamber and the first muffling chamber are arranged at a distance in an axial direction of the compression mechanism, and a second communicating passage is formed in the compression mechanism, the second communicating passage communicating the second muffling chamber with the first muffling chamber.

9. The motor-driven compressor according to claim 8, wherein the second communicating passage has a minimum flow area of S2, and the second muffling chamber has a volume of V2, wherein S2/V2 is 0.08 ≦ 2.2.

10. The motor-driven compressor according to claim 1, wherein a high-pressure chamber is formed between a chamber wall of the housing chamber and the compression mechanism, and the high-pressure chamber communicates with an oil inlet of the first muffling chamber and the oil distribution chamber.

11. The motor-driven compressor according to claim 10, wherein a second sound-deadening chamber communicating with the first sound-deadening chamber is provided in the compression mechanism, and a second communication hole communicating the second sound-deadening chamber with the high-pressure chamber is provided in the compression mechanism.

12. The electric compressor according to any one of claims 1 to 11, wherein the compression mechanism is a rotary compression mechanism or a scroll compression mechanism.

13. An air conditioning system characterized by comprising an electric compressor according to any one of claims 1 to 12.

14. A vehicle, characterized by comprising: a vehicle body and an air conditioning system mounted on the vehicle body, the air conditioning system being the air conditioning system according to claim 13.

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