CN116988973A

CN116988973A - High-pressure housing assembly, electric compressor, air conditioning system and vehicle

Info

Publication number: CN116988973A
Application number: CN202210449945.6A
Authority: CN
Inventors: 马宇山
Original assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Current assignee: Guangdong Welling Auto Parts Co Ltd; Anhui Welling Auto Parts Co Ltd
Priority date: 2022-04-26
Filing date: 2022-04-26
Publication date: 2023-11-03

Abstract

The invention discloses a high-pressure shell component for an electric compressor, the electric compressor, an air conditioning system and a vehicle, wherein the high-pressure shell component comprises: the compression part of the electric compressor is suitable for discharging compressed refrigerant to the high-pressure cavity, and the refrigerant discharge port is used for discharging the refrigerant to the outside of the high-pressure shell; the high-pressure shell is further provided with a resonant cavity and an oil cavity, an oil inlet of the oil cavity is communicated with the high-pressure cavity to receive the refrigerant discharged from the high-pressure cavity, an oil outlet of the oil cavity is communicated with the resonant cavity and the refrigerant discharge port, and the resonant cavity is communicated with the refrigerant discharge port. The high-pressure shell component for the electric compressor is beneficial to improving the noise and the pulsation of the air flow at the exhaust side of the electric compressor, and further improving the noise and the pulsation of the refrigerant discharged by the electric compressor.

Description

High-pressure housing assembly, electric compressor, air conditioning system and vehicle

Technical Field

The invention relates to the technical field of compressors, in particular to a high-pressure shell assembly, an electric compressor, an air conditioning system and a vehicle.

Background

The electric compressor is a core component of the refrigeration equipment for the vehicle, and the electric compressor can generate vibration noise when working, so that the vehicle noise is influenced and the subjective hearing problem is generated. In the related art, after a high-pressure refrigerant discharged from a compression component of an electric compressor enters a high-pressure cavity, the high-pressure refrigerant directly leaves the compressor through a refrigerant discharge port, and along with exhaust airflow noise and pressure pulsation generated during operation of the electric compressor, resonance of each component in a thermal management system on a vehicle is easily excited, so that the problems of vehicle noise and vibration are caused.

Disclosure of Invention

The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, an object of the present invention is to provide a high-pressure housing assembly that can improve the discharge noise and pressure pulsation of an electric compressor.

The invention also provides an electric compressor with the high-pressure shell assembly.

The invention also provides an air conditioning system with the electric compressor.

The invention further provides a vehicle with the air conditioning system.

A high pressure housing assembly for an electric compressor according to an embodiment of the present invention includes: the compression part of the electric compressor is suitable for discharging compressed refrigerant to the high-pressure cavity, and the refrigerant discharge port is used for discharging the refrigerant to the outside of the high-pressure shell; the high-pressure shell is further provided with a resonant cavity and an oil cavity, an oil inlet of the oil cavity is communicated with the high-pressure cavity to receive the refrigerant discharged from the high-pressure cavity, an oil outlet of the oil cavity is communicated with the resonant cavity and the refrigerant discharge port, and the resonant cavity is communicated with the refrigerant discharge port.

According to the high-pressure shell assembly for the electric compressor, the resonant cavity is formed on the high-pressure shell, and the oil cavity, the resonant cavity and the refrigerant discharge port are communicated, so that a cavity structure meeting the Helmholtz resonance principle can be formed, noise generated by the refrigerant acting on the high-pressure shell can be eliminated by the resonant cavity, noise and pressure pulsation accompanying the refrigerant in the gaseous refrigerant can be eliminated, airflow noise and pulsation on the exhaust side of the electric compressor are improved, noise and pulsation of the refrigerant discharged by the electric compressor are improved, resonance problems of various components in a vehicle thermal management system are reduced or eliminated, and safety of the electric compressor is improved.

In some embodiments, a first opening is formed on a surface of the high pressure housing, the first opening is in communication with the resonant cavity, and the high pressure housing includes a first end cap covering the first opening.

In some embodiments, a first end surface is formed on the outer side of the high-pressure shell, the first opening is formed on the first end surface in an open mode, the first end cover comprises a pressing part and a connecting part, and the outer diameter size of the pressing part is larger than that of the connecting part so as to form a limiting surface at a position connected with the connecting part; the connecting part extends into the first opening and is fixedly connected with the inner peripheral wall of the first opening, the pressing part is positioned outside the first opening, and the limiting surface is pressed against the first end surface.

In some embodiments, a connection channel is further formed on the high-pressure housing, the resonant cavity is communicated with the refrigerant discharge port through the connection channel, and the flow area of the connection channel is smaller than that of the resonant cavity.

In some embodiments, the oil outlet of the oil chamber is located at an inner peripheral wall of the connection passage, and the refrigerant in the oil chamber is adapted to enter the connection passage from the oil outlet and to be discharged from the connection passage to the refrigerant discharge port.

In some embodiments, the oil outlet of the oil cavity is located at the inner peripheral wall of the resonant cavity and is located near the refrigerant outlet, and the refrigerant in the oil cavity is suitable for entering the resonant cavity from the oil outlet and then being discharged from the connecting channel to the refrigerant outlet.

In some embodiments, a centerline of the connecting channel coincides with a centerline of the resonant cavity.

In some embodiments, a bottom space in the gravity direction in the resonance chamber is provided with a first oil return passage, which is lower than the oil outlet.

In some embodiments, the position of the first oil return passage within the resonant cavity satisfies: h is less than or equal to 0.3H; and H is the vertical distance between the highest point of the first oil return channel and the lowest point of the resonant cavity in the gravity direction, and H is the vertical distance between the highest point and the lowest point of the resonant cavity in the gravity direction.

In some embodiments, a second oil return passage is arranged at the bottom of the oil cavity in the gravity direction; the inlet end of the first oil return channel is equal to the inlet end of the second oil return channel in height, or the inlet end of the first oil return channel is lower than the inlet end of the second oil return channel.

In some embodiments, a second opening is formed on a surface of the high pressure housing, the second opening being in communication with the oil chamber, the high pressure housing including a second end cap covering the second opening.

In some embodiments, the second opening is configured to open from a bottom space of the oil chamber in a gravitational direction.

In some embodiments, the sum of the angle between the centerline of the resonant cavity and the centerline of the refrigerant discharge port and the angle between the centerline of the oil cavity and the centerline of the refrigerant discharge port is less than 90 °.

In some embodiments, a sound attenuating medium is disposed within the resonant cavity, the sound attenuating medium configured as sound attenuating cotton filled within the resonant cavity.

In some embodiments, a muffler plate is disposed in the resonant cavity, the muffler plate divides the resonant cavity into at least two sub-muffler cavities, and the muffler plate is provided with muffler holes for communicating adjacent two sub-muffler cavities.

In some embodiments, an oil component for oil-gas separation is arranged in the oil component cavity, and the refrigerant entering the oil component cavity is discharged from the oil component outlet after oil-gas separation of the oil component.

In some embodiments, the oil component is configured as a hollow tubular structure, the axial direction of the oil component is parallel to the length direction of the oil cavity, and the oil inlet is located outside the peripheral wall of the oil component.

An electric compressor according to an embodiment of a second aspect of the present invention includes: a housing part comprising a high pressure housing assembly for an electric compressor according to an embodiment of the first aspect of the invention; the exhaust port of the compression part is communicated with the high-pressure cavity so as to discharge compressed refrigerant to the high-pressure cavity; and the motor component comprises a motor body and a driving shaft, and the motor body drives the compression component to execute compression work through the driving shaft.

In some embodiments, the housing component further comprises: the middle partition plate, the compression part and the motor body are respectively arranged at two sides of the middle partition plate, and the driving shaft penetrates through the middle partition plate to be connected with the compression part; the low-pressure shell is provided with a refrigerant suction inlet communicated with the low-pressure cavity, and the compression part sucks refrigerant from the low-pressure cavity.

An air conditioning system according to an embodiment of the third aspect of the present invention includes an electric compressor according to an embodiment of the second aspect of the present invention.

A vehicle according to an embodiment of a fourth aspect of the present invention includes a vehicle body and an air conditioning system mounted on the vehicle body, the air conditioning system being an air conditioning system according to an embodiment of a third aspect of the present invention.

The vehicle, the air conditioning system, the electric compressor and the high-pressure housing assembly for the electric compressor described above have the same advantages over the prior art, and are not described in detail herein.

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 foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is a sectional view of an electric compressor according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view at A-A of FIG. 1 in some embodiments;

FIG. 3 is a cross-sectional view at A-A of FIG. 1 in other embodiments;

FIG. 4 is a cross-sectional view at A-A of FIG. 1 in yet other embodiments;

Fig. 5 is a schematic structural view of a vehicle according to an embodiment of the present invention.

Reference numerals:

an electric compressor 100;

a high-pressure housing 1;

a high pressure chamber 11; a refrigerant discharge port 12;

a resonant cavity 13; a first opening 131; a first oil return passage 132;

a connecting channel 14;

an oil chamber 15; an oil inlet 151 and an oil outlet 152; a second oil return passage 153; a second opening 154;

a first end cap 21; a pressing portion 211; a connection portion 212; a second end cap 22;

an oil component 3;

a low pressure housing 102; a refrigerant suction port 1021; a middle separator 103; a cover plate 104; a low pressure chamber 105;

a compression member 20; an exhaust port 201;

a motor part 30; a motor body 301; a drive shaft 302;

an electric control part 40;

a vehicle body 200; an air conditioning system 300; vehicle 1000.

Detailed Description

Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.

The following disclosure provides many different embodiments, or examples, for implementing different structures of the invention. In order to simplify the present disclosure, components and arrangements of specific examples are described below. They are, of course, merely examples and are not intended to limit the invention. Furthermore, the present invention 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 invention provides examples of various specific processes and materials, but one of ordinary skill in the art will recognize the applicability of other processes and/or the use of other materials.

A high pressure housing assembly for an electric compressor according to an embodiment of the present invention, which can greatly improve exhaust noise and pressure pulsation of the electric compressor 100 by providing the resonance chamber 13 and the oil chamber 15, and enhance user experience, will be described with reference to fig. 1 to 4.

As shown in fig. 1 to 4, the high-pressure housing assembly includes a high-pressure housing 1, a high-pressure chamber 11 and a refrigerant discharge port 12 are formed in the high-pressure housing 1, a compression member 20 of the electric compressor 100 is adapted to discharge compressed refrigerant into the high-pressure chamber 11, and the high-pressure chamber 11 is adapted to discharge refrigerant out of the high-pressure housing 1 through the refrigerant discharge port 12. Thus, when the motor-driven compressor 100 is powered on and normally operates, the low-pressure refrigerant is sucked in, compressed by the compression member 20 to form a high-pressure refrigerant, and the high-pressure refrigerant is discharged into the high-pressure chamber 11 through the exhaust port 201 of the compression member 20 and finally discharged out of the high-pressure casing 1 through the refrigerant discharge port 12.

The high-pressure housing 1 further has a resonance chamber 13 and an oil chamber 15, the oil inlet 151 of the oil chamber 15 communicates with the high-pressure chamber 11 to receive the refrigerant discharged from the high-pressure chamber 11, the oil outlet 152 of the oil chamber 15 communicates with the resonance chamber 13 and the refrigerant discharge port 12, and the resonance chamber 13 communicates with the refrigerant discharge port 12.

That is, after the refrigerant compressed by the compression member 20 enters the high-pressure chamber 11, the refrigerant enters the oil chamber 15 from the oil inlet 151, and the high-pressure refrigerant can be separated from oil after entering the oil chamber 15, so that the separated gaseous refrigerant is discharged through the refrigerant discharge port 12. In the present invention, the oil outlet 152 of the oil chamber 15 communicates with the resonance chamber 13 and the refrigerant discharge port 12, and not only the oil outlet 152 of the oil chamber 15 communicates with both the resonance chamber 13 and the refrigerant discharge port 12, but also the oil outlet 152 of the oil chamber 15 communicates with the refrigerant discharge port 12 through the resonance chamber 13; in other words, in actual design, one side of the oil outlet 152 may be connected to the refrigerant outlet 12, and the other side may be connected to the resonance chamber 13, or at least a part of the resonance chamber 13 may be connected in series between the oil outlet 152 and the refrigerant outlet 12. Thus, the oil chamber 15, the resonance chamber 13 and the refrigerant discharge port 12 are all in communication.

For example, the motor-driven compressor 100 may be a core component of a refrigeration apparatus for the vehicle 1000, and the motor-driven compressor 100 may generate vibration noise when operated, which affects the noise of the vehicle 1000 and causes subjective hearing problems. In the related art, after the high-pressure refrigerant discharged from the compression part 20 of the electric compressor 100 enters the high-pressure chamber 11, the high-pressure refrigerant directly leaves the compressor through the refrigerant discharge port 12, and along with the exhaust airflow noise and pressure pulsation generated during the operation of the electric compressor 100, the resonance of each part in the thermal management system on the vehicle 1000 is easily excited, and the noise and vibration problems of the vehicle 1000 are caused.

In the present invention, by providing the resonance chamber 13, the resonance chamber 13 forms a cavity structure satisfying the helmholtz resonance principle in the high pressure housing assembly of the electric compressor, and the resonance chamber 13 communicates with the oil chamber 15 and the refrigerant discharge port 12, so that noise generated during the process of discharging the separated gaseous refrigerant in the oil chamber 15 to the refrigerant discharge port 12 can be eliminated or weakened in the resonance chamber 13, thereby improving air flow noise and pulsation of the exhaust side of the electric compressor 100, and further improving noise and pulsation of the refrigerant discharged from the electric compressor 100. That is, when one side of the oil outlet 152 of the oil chamber 15 is communicated with the refrigerant outlet 12 and the other side is communicated with the resonance chamber 13, the separated gaseous refrigerant in the oil chamber 15 can be led to face the refrigerant outlet 12 from one side of the oil outlet 152, so that the normal discharge of the high-pressure refrigerant can be realized, and meanwhile, the vibration noise and pressure pulsation associated with the gaseous refrigerant can enter the resonance chamber 13 from the other side of the oil outlet 152, so that the noise and pressure pulsation can be eliminated; alternatively, at least a part of the resonance chamber 13 is connected in series between the oil outlet 152 and the refrigerant discharge port 12, and the separated gaseous refrigerant in the oil chamber 15 enters at least a part of the resonance chamber 13 from the oil outlet 152 and is discharged from the refrigerant discharge port 12 to the outside of the high-pressure casing 1, and in this process, vibration noise and pressure pulsation accompanying the gaseous refrigerant can diffuse from at least a part of the resonance chamber 13 into the entire resonance chamber 13, so that attenuation or elimination of the vibration noise and pressure pulsation can be achieved by the noise reduction design of the resonance chamber 13. Thus, when the motor-driven compressor 100 is used in the vehicle 1000, resonance problems of various components in the thermal management system of the vehicle 1000 due to exhaust gas flow noise and pressure pulsation of the motor-driven compressor 100 can be improved, and noise and vibration caused to the vehicle 1000 can be improved.

It should be noted that, the "helmholtz resonance principle" is well known to those skilled in the art, and on the basis of the present application, the "a resonance cavity 13 may be provided on the high pressure housing 1, and the resonance cavity 13 is communicated with the oil cavity 15, so as to form a cavity structure satisfying the helmholtz resonance principle", those skilled in the art may obtain, according to specific requirements of different working conditions, specific dimensions that the resonance cavity 13 needs to satisfy by matching calculation, so that the present application does not limit the specific dimensions. In addition, the resonant cavity 13 is formed on the high-pressure shell 1, and the silencing accessory with the silencing hole and the silencing cavity is not required to be additionally arranged on the high-pressure shell 1, so that the input cost of the silencing accessory is saved, the installation procedure of assembling the silencing accessory on the high-pressure shell 1 is omitted, the production efficiency is improved, and adverse effects on the silencing effect due to factors such as unstable installation and vibration of the silencing accessory are avoided.

It can be understood that by arranging the resonant cavity 13 and communicating the resonant cavity 13 with the oil cavity 15, the resonant cavity 13 not only can absorb and eliminate vibration noise generated after the high-pressure refrigerant acts on the high-pressure shell 1, but also can directly absorb and eliminate vibration noise and pressure pulsation accompanying the gaseous refrigerant in the process of discharging the oil cavity 15 to the refrigerant discharge port 12, thereby greatly improving the noise elimination effect in the high-pressure shell 1.

According to the high-pressure shell assembly for the electric compressor in the embodiment of the invention, by arranging the resonant cavity 13 on the high-pressure shell 1 and communicating the oil cavity 15 with the resonant cavity 13 and the refrigerant discharge port 12, a cavity structure meeting the Helmholtz resonance principle can be formed, so that the resonant cavity 13 can eliminate noise generated by the refrigerant acting on the high-pressure shell 1 and can eliminate noise and pressure pulsation accompanying the gaseous refrigerant, thereby improving air flow noise and pulsation on the exhaust side of the electric compressor 100, further improving noise and pulsation of the refrigerant discharged by the electric compressor 100, reducing or eliminating resonance problems of various components in a thermal management system of the vehicle 1000, and improving the safety of the electric compressor 100.

In some embodiments, as shown in fig. 2 to 4, a first opening 131 is formed on the surface of the high pressure housing 1, and the first opening 131 communicates with the resonance chamber 13. Therefore, the resonant cavity 13 can be formed by machining from the first opening 131, for example, when the high-pressure shell 1 is formed by punching, the punching tool can be extended into the first opening 131 to perform punching operation, and the punching tool can be withdrawn from the first opening 131, or when the high-pressure shell 1 is formed by casting, the machining die of the resonant cavity 13 can be withdrawn from the first opening 131, thereby facilitating the realization of the machining forming of the resonant cavity 13 by designing the first opening 131, facilitating the realization of the forming of various machining modes of the high-pressure shell 1, reducing the machining difficulty and the machining cost of the high-pressure shell 1, and facilitating the realization of the mass production and practical application of the high-pressure shell 1.

As shown in fig. 2-4, the high-pressure casing 1 includes a first end cover 21 covering the first opening 131, that is, in the present invention, the first opening 131 is designed to cooperate with the first end cover 21, and after the high-pressure casing 1 is installed in the whole electric compressor 100, the high-pressure chamber 11 communicates with the oil chamber 15, the resonance chamber 13 communicates with the oil chamber 15, and the resonance chamber 13 is closed at the first opening 131 by the first end cover 21, so that the resonance chamber 13 forms a cavity structure satisfying the helmholtz resonance principle. The cover referred to in the present invention is provided that at least a portion of the first end cover 21 extends into the first opening 131 and is otherwise partially shielded from the first opening 131, so that the first end cover 21 achieves connection fixation at the first opening 131 and shielding closure of the first opening 131.

In a specific design, the resonant cavity 13 may be configured into a hole shape, and the first opening 131 is formed at least one side hole end of the resonant cavity 13 (it may be understood that the hole shape has two side end holes, and one side end hole of the resonant cavity 13 is communicated with the refrigerant discharge port 12 or the oil cavity 15, and the other side end hole is formed with the first opening 131); wherein, "the resonant cavity 13 is in a hole shape" means that: a three-dimensional hole shape having a certain depth, not a planar hole shape, is formed such that both ends in the direction in which the center line of the hole extends are both ends in the longitudinal direction of the resonant cavity 13. Therefore, the resonant cavity 13 has the advantages of simple structure, convenience in processing, flexible setting position, smaller occupied space, capability of reducing the whole volume and saving the occupied space in a vehicle on the premise of meeting noise reduction, and capability of being processed in various modes such as punching or casting.

In some embodiments, a first end surface is formed on the outer side of the high-pressure housing 1, and the first opening 131 is formed by opening the first end surface, as shown in fig. 2-4, where the first end surface is configured as a processing plane provided on the outer side of the high-pressure housing 1, and the surface is regular and smooth, and is not easy to interfere with a punching tool or a die, so that the punching tool or the die can be easily removed by a user.

The first end cover 21 includes a pressing portion 211 and a connecting portion 212, the pressing portion 211 and the connecting portion 212 are integrally formed, the pressing portion 211 is in a disc shape, the connecting portion 212 is in a column shape, an end face of the pressing portion 211 is fixedly connected with an end face of the connecting portion 212, and an outer diameter size of the pressing portion 211 is larger than an outer diameter size of the connecting portion 212 to form a limiting surface at a position connected with the connecting portion 212. And when in assembly, the connecting part 212 can extend into the first opening 131, the connecting part 212 is fixedly connected with the inner peripheral wall of the first opening 131, and the pressing part 211 is positioned outside the first opening 131 and is pressed against the first end surface.

In a specific design, the connecting portion 212 may be in threaded engagement with the inner peripheral wall of the first opening 131, so that the connecting portion 212 may be detached from or installed into the first opening 131 in a rotatable manner, or the connecting portion 212 may be in interference engagement with the inner peripheral wall of the first opening 131, i.e. the connecting portion 212 may be pressed into the first opening 131 to tightly press against the inner peripheral wall of the first opening 131, thereby ensuring connection stability of the first end cap 21 at the first opening 131. The limiting surface of the pressing portion 211 is designed to be in pressing fit with the first end surface, so that the first end cover 21 and the high-pressure housing 1 can have a limiting effect, namely, when the connecting portion 212 is matched to the maximum position in the first opening 131, the pressing portion 211 is pressed against the first end surface, so that the first end cover 21 is prevented from excessively and even completely extending into the first opening 131, the part of the pressing portion 211 of the first end cover 21 is effectively kept outside the first opening 131, the relative position of the first end cover 21 and the high-pressure housing 1 is ensured to be fixed, and a user can operate the pressing portion 211 to load and disassemble the first end cover 21, so that the rationality of structural design is improved.

In some embodiments, the high-pressure housing 1 is further formed with a connection channel 14, the resonant cavity 13 is communicated with the refrigerant outlet 12 through the connection channel 14, and the flow area of the connection channel 14 is smaller than the flow area of the resonant cavity 13, that is, the medium in the resonant cavity 13, such as the gaseous refrigerant, can flow to the refrigerant outlet 12 through the connection channel 14.

As shown in fig. 2 to 4, the connection passage 14 is provided in an upper region of the high pressure housing 1, and an upper end of the resonance chamber 13 communicates with the connection passage 14, so that the gaseous refrigerant can enter the connection passage 14 upward in the resonance chamber 13 and flow out from the refrigerant discharge port 12. It will be appreciated that in the present invention, the flow area of the connecting channel 14 is set smaller than the flow area of the resonant cavity 13, so that the first end of the resonant cavity 13, such as the lower end in fig. 2, forms one inner end surface of the resonant cavity 13 by the first end cap 21, while the second end of the resonant cavity 13, such as the upper end in fig. 2, forms a stepped surface at the junction with the connecting channel 14, and this stepped surface may serve as the other inner end surface of the resonant cavity 13.

Therefore, the first end of the resonant cavity 13 is matched with the first end cover 21, and the step surface formed between the second end of the resonant cavity 13 and the connecting channel 14 can enable the resonant cavity 13 to form a cavity structure meeting the helmholtz resonance principle, so that the air flow noise and pulsation of the exhaust side of the electric compressor 100 are improved, and the noise and pulsation of the refrigerant discharged by the electric compressor 100 are further improved.

In some embodiments, the oil outlet 152 of the oil chamber 15 is located at an inner peripheral wall of the connection channel 14, and the refrigerant in the oil chamber 15 is adapted to enter the connection channel 14 from the oil outlet 152 and to be discharged from the connection channel 14 to the refrigerant discharge port 12. That is, the oil outlet 152 of the oil cavity 15 communicates with the refrigerant outlet 12 through the connection passage, so that the separated gaseous refrigerant in the oil cavity 15 can enter the connection passage 14 from the oil outlet 152, flow from the connection passage 14 to the refrigerant outlet 12, and finally be discharged out of the high-pressure housing 1 through the refrigerant outlet 12, that is, the connection passage 14 can serve as an intermediate transition cavity between the oil cavity 15 and the refrigerant outlet 12; meanwhile, the oil outlet 152 of the oil cavity 15 is communicated with the resonant cavity 13 through the connecting channel 14, so that vibration noise and pressure pulsation accompanying the gaseous refrigerant can enter the resonant cavity 13 through the connecting channel 14, and noise attenuation and elimination are achieved.

As shown in fig. 4, the connection channel 14 is connected to the upper end of the resonant cavity 13, and the connection channel 14 is higher than the upper end of the oil cavity 15, the upper end of the oil cavity 15 is formed with an oil outlet 152, the oil outlet 152 extends upward to communicate with the connection channel 14, and in a specific design, the oil outlet 152 may be communicated with the middle of the connection channel 14, so that the distance from the oil outlet 152 to the upper end of the resonant cavity 13 is balanced with the distance from the oil outlet 152 to the refrigerant outlet 12, so that after the gaseous refrigerant enters the connection channel 14 from the oil outlet 152, vibration noise and pressure pulsation in the gaseous refrigerant can effectively enter the resonant cavity 13, and noise elimination is achieved.

As shown in fig. 4, the connection channel 14 is a circular hole channel, and the oil outlet 152 is also configured as a circular hole outlet, and in practical design, the inner diameter of the connection channel 14 may be configured to be the same as the inner diameter of the oil outlet 152, so that the connection channel 14 and the oil outlet 152 have a relatively uniform flow area, and the separated gaseous refrigerant is ensured to be smoothly discharged.

In some embodiments, the oil outlet 152 of the oil cavity 15 is located at the inner peripheral wall of the resonant cavity 13, and the oil outlet 152 of the oil cavity 15 is disposed near the refrigerant outlet 12 at the inner peripheral wall of the resonant cavity 13, and the refrigerant in the oil cavity 15 is adapted to enter the resonant cavity 13 from the oil outlet 152 and then be discharged from the connection channel 14 to the refrigerant outlet 12. That is, the separated gaseous refrigerant in the oil cavity 15 may enter the resonant cavity 13 from the oil outlet 152, and after flowing for a certain stroke from the resonant cavity 13, the gaseous refrigerant continues to flow to the connection channel 14, and is further discharged from the connection channel 14 to the refrigerant discharge port 12, that is, during the discharging process of the gaseous refrigerant, the gaseous refrigerant needs to pass through the resonant cavity 13 and flow in the resonant cavity 13 for a certain period of time, so that when the gaseous refrigerant is in the resonant cavity 13, vibration noise and pressure pulsation accompanying the gaseous refrigerant can be effectively diffused in the resonant cavity 13, which is beneficial to eliminating the vibration noise and the pressure pulsation to a greater extent.

As shown in fig. 2 and 3, the oil outlet 152 of the oil chamber 15 is located in an upper region of the inner peripheral wall of the resonance chamber 13, that is, the gaseous refrigerant is allowed to enter into an upper space in the resonance chamber 13 from the oil outlet 152, and vibration noise and pressure pulsation accompanying the gaseous refrigerant are diffused downward toward a middle portion and a lower space in the resonance chamber 13 during the circulation of the gaseous refrigerant in the upper space of the resonance chamber 13, so that the resonance chamber 13 can absorb noise and pulsation effectively.

It should be noted that, in the practical design of the connection channel 14 in the present invention, as shown in fig. 2 and 3, when the oil outlet 152 is disposed on the inner peripheral wall of the resonant cavity 13, the axial dimension of the connection channel 14 is smaller, so that the axial dimension of the resonant cavity 13 under the same high-pressure housing 1 is larger, which is beneficial to realizing the design and formation of the oil outlet 152 on the inner wall of the resonant cavity 13; alternatively, as shown in fig. 4, when the oil outlet 152 is provided on the inner peripheral wall of the connecting channel 14, the axial dimension of the connecting channel 14 is larger, and the axial dimension of the resonant cavity 13 under the same high-pressure housing 1 is smaller, so that the connecting channel 14 has a larger space in the axial direction to design the oil outlet 152, which is beneficial to realizing the processing and forming of the oil outlet 152.

In some embodiments, the center line of the connecting channel 14 coincides with the center line of the resonant cavity 13, where the first opening 131 and the connecting channel 14 are communicated through the resonant cavity 13, that is, the first opening 131 is disposed at an end of the resonant cavity 13 facing away from the connecting channel 14, so that both the connecting channel 14 and the resonant cavity 13 can be formed by machining through the first opening 131. It should be noted that the resonant cavity 13 is configured as a channel structure having a circular cross section, the connection channel 14 is also configured as a channel structure having a circular cross section, and the center line of the resonant cavity 13 and the center line of the connection channel 14 are respective corresponding axes, that is, the axis of the resonant cavity 13 coincides with the axis of the connection channel 14.

As shown in fig. 2 to 4, the first opening 131 is opened at the left lower end of the resonant cavity 13, and the connection channel 14 is formed at the right upper end of the resonant cavity 13, whereby the resonant cavity 13 and the connection channel 14 can be co-molded at the time of co-molding.

Specifically, when the high-pressure housing 1 is formed by punching, the punching tool can be inserted into the first opening 131 to perform punching operation, and the resonant cavity 13 is machined on the high-pressure housing 1 by the punching tool, and the connecting channel 14 can be machined along with the insertion of the punching tool and the reduction of the punching radius, and the axis of the connecting channel 14 is coincident with the axis of the resonant cavity 13, so that the punching tool can be operated in a single machining direction or tool withdrawal direction, and the forming difficulty is reduced. Or, when the high-pressure shell 1 is formed by casting, the processing mold of the resonant cavity 13 can be separated from the first opening 131, and in actual design, the resonant cavity 13 and the connecting channel 14 are formed by processing the same mold, for example, the processing mold comprises two parts, one part of the processing mold is smaller in diameter and used for forming the connecting channel 14, the other part of the processing mold is larger in diameter and used for forming the resonant cavity 13, and the first opening 131 is larger than the outer diameter of the processing mold, so that quick demolding is facilitated, and therefore, the resonant cavity 13 and the connecting channel 14 can be formed by demolding the same mold, the processing efficiency is improved, the number of the molds is reduced, and the processing cost is reduced.

During actual processing, the punching tool can withdraw along the axis of the resonant cavity 13, or the processing die can withdraw along the axis of the resonant cavity 13, so that the punching tool or the processing die is prevented from damaging the molded high-pressure shell 1.

In some embodiments, a first oil return channel 132 is disposed in a bottom space of the resonant cavity 13 in the gravity direction, as shown in fig. 3 and 4, the first oil return channel 132 is disposed at a lower end of the resonant cavity 13, that is, an inlet end of the first oil return channel 132 is disposed at an inner peripheral wall of the resonant cavity 13 and is open toward the interior of the resonant cavity 13, so that oil deposited in the resonant cavity 13 can flow out through the first oil return channel 132 and flow back to a space where the compression part 20 is located.

The first oil return channel 132 extends in a bottom space of the resonant cavity 13 towards a direction close to the compression part 20, an axis of the first oil return channel 132 forms a certain included angle with an axis of the resonant cavity 13, and the first oil return channel 132 extends towards a direction away from the resonant cavity 13 and is inclined downward relative to the resonant cavity 13, it can be understood that the resonant cavity 13 is also configured such that a lower end is opened to form the first opening 131, and thus, the first oil return channel 132 and the resonant cavity 13 can be processed from the same side of the high pressure housing 1, for example, the first oil return channel 132 and the resonant cavity 13 can be processed from different positions of the lower side of the high pressure housing 1 respectively, thereby reducing processing difficulty.

In practical design, the first oil return channel 132 is lower than the oil outlet 152, that is, in the design that the oil outlet 152 is disposed on the inner peripheral wall of the connecting channel 14 or in the design that the oil outlet 152 is disposed on the inner peripheral wall of the resonant cavity 13, the oil outlet 152 is higher than the first oil return channel 132, so that after the oil entering the resonant cavity 13 at the oil outlet 152 is deposited in the resonant cavity 13, the oil can effectively flow back into the space where the compression part 20 is located from the first oil return channel 132, and the inlet end of the first oil return channel 132 is spaced from the lower end surface of the resonant cavity 13 by a certain distance, so that after the first end cover 21 is mounted on the first opening 131, the first end cover 21 is spaced from the first oil return channel 132 to avoid the first end cover 21 from being mounted too deeply to cause blockage of the first oil return channel 132.

In some embodiments, the position of the first oil return passage 132 within the resonance chamber 13 satisfies: h is less than or equal to 0.3H; wherein H is a vertical distance between the highest point of the first oil return passage 132 and the lowest point of the resonance chamber 13 in the gravity direction, and H is a vertical distance between the highest point and the lowest point of the resonance chamber 13 in the gravity direction. As shown in fig. 3, the first oil return passage 132 is located in the bottom space inside the resonance chamber 13, that is, the first oil return passage 132 is spaced apart from the upper end of the resonance chamber 13 and from the lower end of the resonance chamber 13, and the ratio of the vertical distance between the first oil return passage 132 and the lowest point of the resonance chamber 13 to the vertical distance between the highest point and the lowest point of the resonance chamber 13 is less than 0.3, such as 0.28, 0.25, or 0.2.

Therefore, the position of the first oil return channel 132 in the resonant cavity 13 is set within the above range, so that the position of the inlet end of the first oil return channel 132 in the resonant cavity 13 is lower, the deposited oil in the resonant cavity 13 can be ensured to be in the first oil return channel 132, the phenomenon that the pressure of the first end cover 21 is larger due to excessive deposited oil in the resonant cavity 13 is avoided, and the effectiveness of oil return is ensured.

In practical design, the first oil return channel 132 may be set to at least one, that is, one first oil return channel 132 may be set on the outer peripheral wall of the resonant cavity 13, or two, three or more first oil return channels 132 may be set, so as to ensure oil return, prevent that a single first oil return channel 132 is blocked to cause abnormal oil return, and improve oil return reliability.

In the present invention, the height of the first oil return channel 132 can be flexibly set according to the position of the oil outlet 152, for example, when the oil outlet 152 is located at the inner peripheral wall of the connecting channel 14, the height of the oil outlet 152 is higher, the oil entering the resonant cavity 13 is less, and the height of the first oil return channel 132 is higher; or if the oil outlet 152 is located at the inner peripheral wall of the resonant cavity 13, the height of the oil outlet 152 is lower, so that more oil enters the resonant cavity 13, and the height of the first oil return channel 132 is lower, so as to ensure timely oil return. Wherein the higher and lower are not absolutely higher or lower than the two arrangements.

In some embodiments, the bottom of the oil cavity 15 in the gravity direction is provided with the second oil return channel 153, it is understood that the oil cavity 15 is communicated with the high pressure cavity 11, so that the high pressure refrigerant can enter the oil cavity 15 for oil-gas separation, the separated gaseous refrigerant flows from the oil outlet 152 to the connecting channel 14 or the resonant cavity 13, the separated oil liquid is converged downward at the bottom of the oil cavity 15 under the action of gravity, and flows back from the second oil return channel to the space where the compression part 20 is located.

The second oil return channel 153 extends in a direction approaching the compression member 20 in a bottom space of the oil cavity 15, an axis of the second oil return channel 153 forms a certain included angle with an axis of the oil cavity 15, and the second oil return channel 153 extends in a direction departing from the oil cavity 15 and is inclined downward relative to the oil cavity 15. In this way, both the second oil return passage 153 and the oil chamber 15 may be machined from the same side of the high pressure housing 1, for example, the second oil return passage 153 and the oil chamber 15 may be machined from different positions on the lower side of the high pressure housing 1, respectively, so as to reduce machining difficulty. In practical design, the second oil return channel 153 is lower than the oil outlet 152 and is also lower than the oil inlet 151 of the oil cavity 15, so that after the high-pressure refrigerant enters the oil cavity 15 from the oil inlet 151 for separation, the oil can be deposited in the bottom space of the oil cavity 15 under the action of gravity so as to return from the second oil return channel 153, and reasonable oil return of the oil in the oil cavity 15 is ensured.

And, in actual design, the inlet end of the first oil return passage 132 may be equal in height to the inlet end of the second oil return passage 153, or the inlet end of the first oil return passage 132 may be lower than the inlet end of the second oil return passage 153. It will be appreciated that after the high pressure refrigerant is separated through the oil chamber 15, most of the oil is deposited in the space at the bottom of the oil chamber 15 from the second oil return passage 153 to the high pressure component, and the amount of oil that accompanies the gaseous refrigerant and enters the resonant cavity 13 is relatively small, i.e., the amount of oil that is deposited in the oil chamber 15 as a whole is significantly smaller than the amount of oil in the resonant cavity 13.

Thus, in the present invention, the height of the inlet end of the first oil return passage 132 is set to be equal to or lower than the height of the inlet end of the second oil return passage 153, so that the heights of the inlet ends of the two oil return passages can be flexibly matched with the deposition amount of the oil in the corresponding chambers, thereby ensuring that both the oil chamber 15 and the resonance chamber 13 can return oil effectively.

The second opening 154 is formed on the surface of the high-pressure shell 1, the second opening 154 is communicated with the oil cavity 15, namely, the oil cavity 15 can be formed by machining from the second opening 154, for example, when the high-pressure shell 1 is formed by punching, a punching tool can be inserted into the second opening 154 to carry out punching operation, and the punching tool can be withdrawn from the second opening 154, or when the high-pressure shell 1 is formed by casting, a machining die of the oil cavity 15 can be withdrawn from the second opening 154, thereby being beneficial to realizing the machining forming of the oil cavity 15 by designing the second opening 154, being beneficial to realizing the forming of various machining modes of the high-pressure shell 1, reducing the machining difficulty and the machining cost of the high-pressure shell 1 and being beneficial to realizing the mass production and practical application of the high-pressure shell 1.

As shown in fig. 2-4, the high-pressure housing 1 includes a second end cap 22 covering the second opening 154, that is, in the present invention, the second opening 154 is designed to cooperate with the second end cap 22, and after the high-pressure housing 1 is installed in the whole electric compressor 100, the high-pressure chamber 11 is communicated with the oil inlet 151 of the oil chamber 15, and the resonant chamber 13 is communicated with the oil inlet 151 of the oil chamber 15, and the second opening 154 is closed by the second end cap 22, so that the oil chamber 15 has a stable sealing state at positions other than the oil inlet 151 and the oil inlet 151, thereby ensuring the reliability of oil effect.

In a specific design, the oil chamber 15 may be configured in a hole shape, and the second opening 154 is formed at least one side hole end of the oil chamber 15 (it may be understood that the hole shape has two side end holes, and one side end hole of the oil chamber 15 is the oil outlet 152 for communicating with the connection channel 14 or the resonance chamber 13, and the other side end hole is formed with the second opening 154); wherein, "the oil chamber 15 is in a hole shape" means that: the three-dimensional hole shape having a certain depth is not a plane hole shape, and both ends in the direction of extending the center line of the hole are both ends in the length direction of the oil chamber 15. Therefore, the oil cavity 15 is simple in structure and convenient to process, can be processed by adopting various modes such as punching or casting, is flexible in setting position, meets the design requirements of different models, is small in occupied space, can reduce the whole volume on the premise of meeting noise reduction, and saves the occupied space in a vehicle.

In some embodiments, the outer side of the high pressure housing 1 is formed with a second end surface, and the second opening 154 is formed by opening on the second end surface, as shown in fig. 2-4, where the second end surface is configured as a processing plane provided on the outer side of the high pressure housing 1, and the surface is regular and smooth, and is not easy to interfere with the punching tool or the die, so that the user can conveniently operate the punching tool or the die to release. The second end cap 22 may be configured in the same structural shape as the first end cap 21, and the matching manner of the second end cap 22 and the second opening 154 is the same as the matching manner of the first end cap 21 and the first opening 131, which is not described herein.

In some embodiments, the second opening 154 is configured to open from a bottom space in the gravitational direction of the oil content chamber 15, as shown in fig. 2 and 4, the second opening 154 is opened at a lower portion of the high-pressure casing 1, and as shown in fig. 2 to 4, the first opening 131 is opened at a left side of the lower portion of the high-pressure casing 1, and the second opening 154 is opened at a right side of the lower portion of the high-pressure casing 1, so that both the resonance chamber 13 and the oil content chamber 15 are formed from the lower side of the high-pressure casing 1.

If the high-pressure shell 1 adopts the punching molding during actual processing, the punching cutter stretches into from the second opening 154 to perform punching operation, and when the cutter is retracted, the punching cutter can withdraw from the second opening 154 under the action of gravity matched with mechanical force, so that quick cutter retraction is facilitated, and in the punching process, generated punching fragments can be automatically discharged from the second opening 154 under the action of gravity, the problem that excessive deposition fragments in the oil cavity 15 affect the processing precision is avoided, and the reliability of the molding of the oil cavity 15 is ensured. Or when the high-pressure shell 1 is cast, the processing mold of the oil cavity 15 can be separated from the second opening 154, that is, the processing mold can be separated from the second opening 154 under the action of gravity and mechanical force, so as to reduce the demolding difficulty.

The center line of the oil outlet 152 coincides with the center line of the oil chamber 15, and both the oil outlet 152 and the oil chamber 15 are adapted to be formed by the second opening 154. The oil chamber 15 is configured as a channel structure having a circular cross section, the oil outlet 152 is also configured as a channel structure having a circular cross section, and the center line of the oil chamber 15 and the center line of the oil outlet 152 are axes corresponding to each other, that is, the axis of the oil chamber 15 coincides with the axis of the oil outlet 152.

As shown in fig. 2 to 4, the second opening 154 is opened at the right lower end of the oil chamber 15, and the oil outlet 152 is formed at the left upper end of the oil chamber 15, whereby the oil chamber 15 and the oil outlet 152 can be molded together at the time of co-molding.

Specifically, when the high-pressure housing 1 is formed by punching, the punching tool can be inserted into the second opening 154 to perform punching operation, and the oil cavity 15 is processed by the punching tool on the high-pressure housing 1, and the oil outlet 152 can be processed along with the insertion of the punching tool and the reduction of the punching radius, and the axis of the oil outlet 152 and the axis of the oil cavity 15 are coincident, so that the punching tool can be operated in a single processing direction or retracting direction, and the forming difficulty is reduced. Or, when the high-pressure housing 1 is formed by casting, the processing mold of the oil cavity 15 can be separated from the second opening 154, and in practical design, the oil cavity 15 and the oil outlet 152 are formed by processing the same mold, for example, the processing mold comprises two parts, one part of the processing mold has a smaller diameter for forming the oil outlet 152, the other part of the processing mold has a larger diameter for forming the oil cavity 15, and the second opening 154 is larger than the outer diameter of the processing mold, so that quick demolding is facilitated, and therefore, the oil cavity 15 and the oil outlet 152 can be formed by demolding the same mold, so that the processing efficiency is improved, the number of the molds is reduced, and the processing cost is reduced.

During actual processing, the punching tool can withdraw along the axis of the oil cavity 15, or the processing die can withdraw along the axis of the oil cavity 15, so that the high-pressure shell 1 after being molded is prevented from being damaged by the punching tool or the processing die.

In some embodiments, the sum of the included angle between the center line of the resonance chamber 13 and the center line of the refrigerant discharge port 12 and the included angle between the center line of the oil chamber 15 and the center line of the refrigerant discharge port 12 is smaller than 90 °, as in practical designs, the center line of the refrigerant discharge port 12 may be arranged to extend vertically, as shown in fig. 2-4, the center line of the resonance chamber 13 is inclined to the left with respect to the center line of the refrigerant discharge port 12, the center line of the oil chamber 15 is inclined to the right with respect to the center line of the refrigerant discharge port 12, and the sum of the included angle between the center line of the resonance chamber 13 and the vertical and the included angle between the center line of the oil chamber 15 and the vertical is smaller than 90 °, as the sum of the included angles is 70 °, 80 °.

It should be noted that, as shown in fig. 2-4, the first opening 131 of the resonant cavity 13 and the second opening 154 of the oil cavity 15 are both opened at the lower portion of the high pressure housing 1, that is, when the high pressure housing 1 is formed by punching, the punching tool of the resonant cavity 13 and the punching tool of the oil cavity 15 can both extend into or withdraw from the bottom of the high pressure housing 1, so that during actual processing, the resonant cavity 13 and the oil cavity 15 can be punched by using the same tool, and the same tool is operated at the bottom of the high pressure housing 1, so that the movement amount of the punching tool is small, the occupied operation space is small, the processing efficiency is improved, and the processing cost is reduced.

In some embodiments, a sound attenuating medium is disposed within the resonant cavity 13 for increasing the sound attenuating effect within the resonant cavity 13. It can be understood that after the vibration noise and the pressure pulsation in the gaseous refrigerant enter the resonant cavity 13, the inner wall of the resonant cavity 13 can be used for repeated reflection to realize noise elimination and attenuation of pulsation, and the noise elimination and attenuation effect of the pulsation can be enhanced by the noise reduction medium, so that the noise reduction performance of the resonant cavity 13 is improved.

The silencing medium may be made of silencing cotton filled in the resonant cavity 13, and the silencing cotton is of a soft porous structure, so that after the silencing cotton is filled in the resonant cavity 13, the pore structure of the silencing cotton can absorb vibration energy of sound, and the purpose of strengthening silencing is achieved.

When in actual installation, the silencing medium can be filled in the resonant cavity 13, and the sufficient quantity of the silencing medium is ensured, so that the silencing medium cannot shake in the resonant cavity 13, and the silencing medium has an effective effect.

In other embodiments, a muffler plate is provided within the resonant cavity 13, and the muffler plate may be configured as a flat plate-like structure, or the muffler plate may be configured as a curved plate. Wherein, after setting up the acoustical panel in resonant cavity 13, the acoustical panel separates resonant cavity 13 into two at least sub-acoustical cavities, and the acoustical panel is equipped with the amortization hole that is used for two adjacent sub-acoustical cavities intercommunication, from this, each sub-acoustical cavity all is in the intercommunication state. In this way, when the resonance chamber 13 and the oil chamber 15 are communicated, vibration noise and pressure pulsation associated with the gaseous refrigerant can enter the resonance chamber 13, gradually enter each sub-muffler hole through the muffler hole, and be individually muffled by the plurality of sub-muffler chambers, whereby the muffling effect of the resonance chamber 13 in the high-pressure casing 1 can be improved doubly.

In practical design, the silencer can be arranged in a plurality of silencer plates, the silencer plates are distributed at intervals in the length direction of the resonant cavity 13, and the silencer holes in two adjacent silencer plates are distributed in a staggered mode in the length direction of the resonant cavity 13, so that the silencing effect is improved.

Wherein the number of the sound deadening plates can be flexibly designed according to the axial length of the actual resonant cavity 13, such as 5, 6 or more sound deadening plates are provided in the resonant cavity 13.

In some embodiments, the oil chamber 15 is provided with an oil component 3 for oil-gas separation, the oil component 3 is used for improving the oil effect in the oil chamber 15, and the refrigerant in the oil chamber 15 can be discharged from the oil outlet 152 after oil-gas separation by the oil component 3. That is, after the high-pressure refrigerant in the high-pressure chamber 11 enters the oil chamber 15, the separated oil is deposited downward in the bottom space of the oil chamber 15 by the separation action of the oil component 3, and flows back from the second oil return passage 153 toward the space where the compression member 20 is located, and the separated gaseous refrigerant is discharged upward toward the oil outlet 152.

And, further, the oil member 3 is constructed in a hollow tubular structure, such as the oil member 3 is constructed as an oil insertion tube, the axial direction of the oil member 3 is parallel to the length direction of the oil chamber 15, that is, the axis of the lumen of the oil insertion tube is parallel to the axis of the oil chamber 15, and the oil inlet 151 is located outside the peripheral wall of the oil member 3, that is, the oil inlet 151 is provided at the outer peripheral wall of the oil chamber 15 and located radially outside the oil insertion tube.

After the oil cannula is mounted in the oil chamber 15, the oil cannula is positioned in the upper space of the oil chamber 15, the upper end of the oil cannula is fixedly connected to the upper end of the oil chamber 15, the lower end of the oil cannula is suspended in the oil chamber 15, both ends of the oil cannula are opened, the upper end of the oil cannula is communicated with the oil outlet 152, the lower end of the oil cannula is communicated with the oil chamber 15, and the height of the oil inlet 151 is positioned between the upper end and the lower end of the oil cannula, as shown in fig. 2 to 4.

Thus, after the high-pressure refrigerant in the high-pressure chamber 11 enters the oil chamber 15, the high-pressure refrigerant acts on the outer peripheral wall of the oil insertion pipe at a high flow rate, and moves downward and into a space lower than the lower end of the oil insertion pipe due to the gravity of the high-pressure refrigerant itself guided by the outer peripheral wall of the oil insertion pipe, and the separated gaseous refrigerant enters the lumen of the oil insertion pipe and is discharged upward from the oil outlet 152 under the action of the internal pressure of the oil chamber 15; the oil separated from the high-pressure refrigerant is deposited downward in the bottom space of the oil cavity 15 along the outer peripheral wall of the oil insertion pipe or the inner peripheral wall of the oil cavity 15, and flows back into the space where the compression member 20 is located from the second oil return passage 153, thereby realizing oil-gas separation.

It can be understood that the oil inlet 151 and the outer circumferential wall of the oil insertion pipe are arranged opposite to each other in the radial direction, so that the high-pressure refrigerant entering the oil cavity 15 from the oil inlet 151 directly acts on the outer circumferential wall of the oil insertion pipe, flows towards the inner circumferential wall of the oil cavity 15 under the guiding action of the oil insertion pipe, and forms a circumferential swirl along the inner circumferential wall of the oil cavity 15, thereby enabling oil gas to be separated at a high speed in the circumferential swirl process, and being beneficial to enhancing the oil-gas separation effect.

In practical design, as shown in fig. 2-4, the axial length of the oil insertion tube is set to be not less than half of the axial length of the oil cavity 15, so that after the high-pressure refrigerant enters the oil cavity 15, the high-pressure refrigerant can have enough flow stroke to realize oil-gas separation, and the amount of oil in the gaseous refrigerant is reduced, namely, the oil entering the resonant cavity 13 or the connecting channel 14 is reduced.

Next, referring to fig. 1, an electric compressor 100 according to a second aspect of the present invention will be described.

As shown in fig. 1, the motor-driven compressor 100 may include: the motor assembly includes a housing part including the high-pressure housing assembly for the electric compressor according to any one of the above-described first aspect, the compression part 20 having the discharge port 201 communicating with the high-pressure chamber 11 to discharge the compressed refrigerant to the high-pressure chamber 11, and a motor part 30 including a motor body 301 and a driving shaft 302, the motor body 301 driving the compression part 20 through the driving shaft 302 to perform a compression operation. Thus, by providing the high-pressure casing 1, exhaust gas flow noise and pressure pulsation generated when the motor-driven compressor 100 is operated can be effectively improved.

The specific type of the motor-driven compressor 100 is not limited, and may be, for example, a horizontal compressor having a central axis extending in a lateral direction or slightly inclined to a horizontal line, a vertical compressor having a central axis extending in a vertical direction or slightly inclined to a vertical line, or the like.

It should be noted that the specific type of the electric compressor 100 is not limited, and may be, for example, a rotary compressor or a scroll compressor, etc., when the electric compressor 100 is a rotary compressor (this example is not shown in the drawings), the compression member 20 may include a cylinder, a piston, a slide vane, etc., the drive shaft 302 drives the piston to roll in the cylinder, and when the electric compressor 100 is a scroll compressor (for example, the example shown in fig. 1), the compression member 20 may include a fixed scroll, a movable scroll, the drive shaft 302 drives the movable scroll to rotate, etc.

It should be noted that, the relative positional relationship between the high-pressure housing 1 and the compression member 20 is not limited, for example, the compression member 20 may be completely located outside the high-pressure housing 1, or the compression member 20 may be at least partially located outside the high-pressure housing 1, so as to meet different design requirements of different models.

In some embodiments, as shown in fig. 1, the housing component further comprises: a middle partition plate 103 and a low pressure housing 102, a compression member 20 and a motor body 301 are disposed on both sides of the middle partition plate 103, and a driving shaft 302 is provided to penetrate the middle partition plate 103 to be connected with the compression member 20; a low-pressure chamber 105 accommodating the motor body 301 is formed between the low-pressure casing 102 and the intermediate partition 103, a refrigerant suction port 1021 communicating with the low-pressure chamber 105 is formed in the low-pressure casing 102, and the compression element 20 sucks in refrigerant from the low-pressure chamber 105. The low-pressure housing 102 is further connected with a cover plate 104, an installation space is defined between the cover plate 104 and the low-pressure housing 102, and the electric control component 40 is disposed in the installation space.

Thus, the electric compressor 100 may be a low back pressure compressor, which is advantageous for applications of new energy vehicles 1000 such as electric vehicles, hybrid vehicles, etc., and when used in these vehicles 1000, it is possible to improve noise and pressure pulsation of exhaust air flow due to the electric compressor 100, improve resonance problems of a thermal management system of the vehicle 1000, and improve noise and vibration caused to the vehicle 1000.

In some embodiments, as shown in fig. 1, the middle partition 103 is sandwiched between the low pressure casing 102 and the compression member 20, and the high pressure casing 1 is provided on the side of the compression member 20 facing away from the middle partition 103. Therefore, the structure can be simplified, the assembly is simplified, the volume is reduced, the production efficiency is improved, and the connection reliability is improved. For example, such a structure may be applied to a scroll compressor, but the structure of the scroll compressor is not limited thereto.

Further, as shown in fig. 1, the high-pressure casing 1 has a casing end face on which a high-pressure chamber 11 is formed, the high-pressure chamber 11 being open toward the compression member 20, the compression member 20 being in sealing engagement with the casing end face, and the exhaust port 201 of the compression member 20 being open toward the high-pressure chamber 11, whereby communication between the exhaust port 201 and the high-pressure chamber 11 can be achieved.

Next, an air conditioning system 300 according to an embodiment of the third aspect of the present invention is described with reference to the accompanying drawings.

Wherein the air conditioning system 300 may comprise the electric compressor 100 according to any of the embodiments of the second aspect of the present invention. Since the exhaust noise and pulsation of the electric compressor 100 according to any one of the embodiments of the second aspect of the present invention can be improved, when the electric compressor 100 is used in the air conditioning system 300, the pressure pulsation and noise problem caused to the air conditioning system 300 due to the exhaust air flow noise and pressure pulsation of the electric compressor 100 can be improved.

It should be noted that, the specific application scenario of the air conditioning system 300 according to the embodiment of the present invention is not limited, for example, an indoor air conditioner, an indoor refrigerator, a vehicle-mounted air conditioner, etc., and when the application scenario is determined, a person skilled in the art can know other components of the air conditioning system 300, for example, when the air conditioning system is used in an indoor air conditioner or an indoor refrigerator, an evaporator, a condenser, a throttling element, etc., and, for example, when the air conditioning system is used in a vehicle-mounted air conditioner, at least one of an in-vehicle condenser, an in-vehicle evaporator, an out-vehicle condenser, an out-vehicle evaporator, a throttling assembly, etc., which are not described herein.

Next, a vehicle 1000 according to a fourth aspect of the invention is described with reference to the accompanying drawings.

As shown in fig. 5, a vehicle 1000 may include a vehicle body 200 and an air conditioning system 300 mounted on the vehicle body 200, the air conditioning system 300 including the air conditioning system 300 according to any of the embodiments of the third aspect of the present invention. Since the air conditioning system 300 according to any of the embodiments of the present invention can improve the exhaust noise and pulsation of the electric compressor 100, when the air conditioning system 300 is used for the vehicle 1000, the resonance problem of each component in the thermal management system of the vehicle 1000 due to the exhaust air flow noise and pressure pulsation of the electric compressor 100 can be improved, and the noise and vibration caused to the vehicle 1000 can be improved. Optionally, the electric compressor 100 is configured to compress at least one refrigerant of R134a, R744, R290, and R1234yf, so as to meet the vehicle-mounted usage requirement.

It should be noted that, the specific type of the vehicle 1000 according to the embodiment of the present invention is not limited, and may be, for example, a new energy vehicle, which may include a pure electric vehicle, a hybrid vehicle, and the like, and will be described herein. In addition, when the type of the vehicle 1000 is specifically determined, those skilled in the art can know other components of the vehicle 1000, and detailed description thereof will be omitted herein.

A high pressure housing assembly for an electric compressor for a vehicle 1000 in accordance with some embodiments of the present invention is described below with reference to fig. 2-4.

Example 1

As shown in fig. 2, the high-pressure casing 1 is formed with a high-pressure chamber 11 and a refrigerant discharge port 12, the high-pressure chamber 11 is located in a lower region of the high-pressure casing 1, the refrigerant discharge port 12 is located in an upper region of the high-pressure casing 1, the high-pressure casing 1 is further formed with a resonance chamber 13 and an oil chamber 15, and the high-pressure chamber 11 is located between the resonance chamber 13 and the oil chamber 15. Wherein, resonant cavity 13 forms in the left side of high-pressure housing 1, and resonant cavity 13 extends towards upper right slope along the lower left of high-pressure housing 1, simultaneously, oil cavity 15 forms in the right side of high-pressure housing 1, and oil cavity 15 extends towards upper left slope along the lower right of high-pressure housing 1, the periphery wall of oil cavity 15 is equipped with oil inlet 151, oil inlet 151 communicates high-pressure cavity 11 and oil cavity 15, and be equipped with oil outlet 152 in the upper end of oil cavity 15, oil outlet 152 communicates oil cavity 15 and resonant cavity 13's upper end, resonant cavity 13's upper end is equipped with connecting channel 14, connecting channel 14 communicates resonant cavity 13 and refrigerant discharge port 12.

The second oil return passage 153 communicates the oil chamber 15 with the space where the compression element 20 is located in the oil chamber 15, so that the oil deposited in the second oil return passage 153 can return from the second oil return passage 153 to the space where the compression element 20 is located.

As shown in fig. 2, the lower end of the resonant cavity 13 is opened, and a first opening 131 is formed, the first opening 131 is opened at the lower left of the high-pressure housing 1, the first opening 131 is used for processing the resonant cavity 13, a first end cover 21 is provided at the first opening 131, and the first end cover 21 is used for closing the lower end of the resonant cavity 13. Meanwhile, the lower end of the oil chamber 15 is opened, and a second opening 154 is formed, the second opening 154 is opened at the lower right of the high pressure housing 1, the second opening 154 is used for processing the oil chamber 15, a second end cover 22 is arranged at the second opening 154, and the second end cover 22 is used for closing the lower end of the oil chamber 15.

Example two

As shown in fig. 3, the second embodiment differs from the first embodiment in that it includes: the first oil return channel 132 is disposed in the resonant cavity 13, the first oil return channel 132 is disposed in the lower space of the resonant cavity 13, and the first oil return channel 132 is disposed in the upper region of the first end cover 21, wherein the first oil return channel 132 communicates the lower space of the resonant cavity 13 with the space where the compression part 20 is located, so that the oil deposited in the resonant cavity 13 can return from the first oil return channel 132 to the space where the compression part 20 is located.

Example III

As shown in fig. 4, the third embodiment is different from the second embodiment in that it includes: the axial length of the connection passage 14 is large, and the oil chamber 15 is not directly communicated with the resonance chamber 13, and the oil outlet 152 of the oil chamber 15 is provided at the inner peripheral wall of the connection passage 14, that is, the oil chamber 15 is directly communicated with the connection passage 14 through the oil outlet 152.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

In the description of the invention, a "first feature" or "second feature" may include one or more of such features.

In the description of the present invention, "plurality" means two or more.

In the description of the invention, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, and may also include the first and second features not being in direct contact but being in contact with each other by another feature therebetween.

In the description of the invention, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means 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, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

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

Claims

1. A high pressure housing assembly for an electric compressor, comprising:

a high-pressure housing (1), wherein a high-pressure chamber (11) and a refrigerant discharge port (12) are formed on the high-pressure housing (1), a compression component (20) of the electric compressor (100) is suitable for discharging compressed refrigerant to the high-pressure chamber (11), and the refrigerant discharge port (12) is used for discharging refrigerant to the outside of the high-pressure housing (1);

the high-pressure shell (1) is further provided with a resonant cavity (13) and an oil cavity (15), an oil inlet (151) of the oil cavity (15) is communicated with the high-pressure cavity (11) to receive the refrigerant discharged from the high-pressure cavity (11), an oil outlet (152) of the oil cavity (15) is communicated with the resonant cavity (13) and the refrigerant discharge port (12), and the resonant cavity (13) is communicated with the refrigerant discharge port (12).

2. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that a first opening (131) is formed on a surface of the high-pressure housing (1), the first opening (131) communicates with the resonance chamber (13), and the high-pressure housing (1) includes a first end cap (21) covering the first opening (131).

3. The high-pressure housing assembly for an electric compressor according to claim 2, wherein a first end surface is formed on an outer side of the high-pressure housing (1), the first opening (131) is formed open at the first end surface, the first end cap (21) includes a pressing portion (211) and a connecting portion (212), an outer diameter size of the pressing portion (211) is larger than an outer diameter size of the connecting portion (212) to form a limit surface at a position connected to the connecting portion (212); wherein,

The connecting part (212) extends into the first opening (131) and is fixedly connected with the inner peripheral wall of the first opening (131), and the pressing part (211) is positioned outside the first opening (131) and the limiting surface is pressed against the first end surface.

4. The high-pressure housing assembly for an electric compressor according to claim 1, wherein a connection passage (14) is further formed on the high-pressure housing (1), the resonance chamber (13) communicates with the refrigerant discharge port (12) through the connection passage (14), and an overflow area of the connection passage (14) is smaller than that of the resonance chamber (13).

5. The high-pressure housing assembly for an electric compressor according to claim 4, wherein an oil outlet (152) of the oil chamber (15) is located at an inner peripheral wall of the connection passage (14), and a refrigerant in the oil chamber (15) is adapted to enter the connection passage (14) from the oil outlet (152) and to be discharged from the connection passage (14) to the refrigerant discharge port (12).

6. The high-pressure housing assembly for an electric compressor according to claim 4, wherein an oil outlet (152) of the oil chamber (15) is located at an inner peripheral wall of the resonance chamber (13) and is disposed near the refrigerant discharge port (12), and the refrigerant in the oil chamber (15) is adapted to enter the resonance chamber (13) from the oil outlet (152) and then be discharged from the connection passage (14) to the refrigerant discharge port (12).

7. A high-pressure housing assembly for an electric compressor according to claim 4, characterized in that the centre line of the connecting channel (14) coincides with the centre line of the resonant cavity (13).

8. High-pressure housing assembly for an electric compressor according to any one of claims 1-7, characterized in that a bottom space in the direction of gravity within the resonance chamber (13) is provided with a first oil return channel (132), which first oil return channel (132) is lower than the oil outlet (152).

9. The high-pressure housing assembly for an electric compressor according to claim 8, characterized in that the position of the first oil return passage (132) within the resonant cavity (13) satisfies: h is less than or equal to 0.3H; wherein H is the vertical distance between the highest point of the first oil return channel (132) and the lowest point of the resonant cavity (13) in the gravity direction, and H is the vertical distance between the highest point and the lowest point of the resonant cavity (13) in the gravity direction.

10. The high-pressure housing assembly for an electric compressor according to claim 8, characterized in that a second oil return channel (153) is provided in the bottom of the oil chamber (15) in the direction of gravity;

the inlet end of the first oil return passage (132) is at the same height as the inlet end of the second oil return passage (153), or the inlet end of the first oil return passage (132) is lower than the inlet end of the second oil return passage (153).

11. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that a second opening (154) is formed on a surface of the high-pressure housing (1), the second opening (154) being in communication with the oil chamber (15), the high-pressure housing (1) comprising a second end cap (22) covering the second opening (154).

12. A high-pressure housing assembly for an electric compressor as set forth in claim 11, wherein,

the second opening (154) is configured to open from a bottom space in a gravitational direction of the oil chamber (15).

13. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that the sum of the angle between the centre line of the resonance chamber (13) and the centre line of the refrigerant discharge opening (12) and the angle between the centre line of the oil chamber (15) and the centre line of the refrigerant discharge opening (12) is less than 90 °.

14. A high-pressure housing assembly for an electric compressor according to claim 1, characterized in that a sound-deadening medium is provided in the resonance chamber (13), which sound-deadening medium is configured as sound-deadening cotton filled in the resonance chamber (13).

15. A high-pressure housing assembly for an electric compressor according to claim 1, characterized in that a sound-deadening plate is provided in the resonance chamber (13), which sound-deadening plate divides the resonance chamber (13) into at least two sub-sound-deadening chambers, and that the sound-deadening plate is provided with sound-deadening holes for communicating adjacent two of the sub-sound-deadening chambers.

16. The high-pressure housing assembly for an electric compressor according to any one of claims 1 to 15, characterized in that an oil component (3) for oil-gas separation is provided in the oil component chamber (15), and that the refrigerant entering the oil component chamber (15) is discharged from the oil component outlet (152) after oil-gas separation by the oil component (3).

17. The high-pressure housing assembly for an electric compressor according to claim 16, characterized in that the oil component (3) is constructed in a hollow tubular structure, the axial direction of the oil component (3) being parallel to the length direction of the oil cavity (15), the oil inlet (151) being located outside the peripheral wall of the oil component (3).

18. An electric compressor (100), characterized by comprising:

a housing part comprising a high pressure housing assembly for an electric compressor according to any one of claims 1-17;

a compression member (20), wherein an exhaust port (201) of the compression member (20) communicates with the high-pressure chamber (11) to discharge compressed refrigerant into the high-pressure chamber (11);

-a motor part (30), the motor part (30) comprising a motor body (301) and a drive shaft (302), the motor body (301) driving the compression part (20) via the drive shaft (302) to perform a compression operation.

19. The electric compressor (100) of claim 18, wherein the housing member further comprises:

a middle partition plate (103), wherein the compression component (20) and the motor body (301) are respectively arranged at two sides of the middle partition plate (103), and the driving shaft (302) penetrates through the middle partition plate (103) to be connected with the compression component (20);

a low-pressure housing (102), a low-pressure chamber (105) for accommodating the motor body (301) is formed between the low-pressure housing (102) and the middle partition plate (103), a refrigerant suction port (1021) communicating with the low-pressure chamber (105) is formed in the low-pressure housing (102), and the compression member (20) sucks in refrigerant from the low-pressure chamber (105).

20. An air conditioning system (300) characterized by comprising an electric compressor (100) according to any one of claims 18-19.

21. A vehicle (1000) characterized by comprising an air conditioning system (300) according to claim 20.