High-pressure housing assemblies, electric compressors, air conditioning systems, and vehicles

Abstract

This invention discloses a high-pressure housing assembly, an electric compressor, an air conditioning system, and a vehicle. The high-pressure housing assembly includes: a high-pressure housing with a high-pressure chamber and a refrigerant outlet; a compression component of the electric compressor adapted to discharge compressed refrigerant into the high-pressure chamber; and the refrigerant outlet for discharging refrigerant outside the high-pressure housing. The high-pressure housing also has a resonant chamber and an oil separator chamber. The oil separator inlet of the oil separator chamber is connected to the high-pressure chamber, and the oil separator outlet is located on the inner wall of the resonant chamber. A silencer tube is provided within the resonant chamber. The first end of the silencer tube is connected to the refrigerant outlet, and the second end is located within and connected to the resonant chamber. Refrigerant entering the resonant chamber passes through the second end into the silencer tube, and the refrigerant within the silencer tube is discharged outside the high-pressure housing through the refrigerant outlet. This high-pressure housing assembly of the invention helps to improve airflow noise and pressure pulsation on the exhaust side of the electric compressor, thereby improving the noise and pressure pulsation of the refrigerant discharged from the electric compressor.

Description

Technical Field

[0001] This invention relates to the field of compressor technology, and in particular to a high-pressure housing assembly, an electric compressor, an air conditioning system, and a vehicle. Background Technology

[0002] The electric compressor is a core component of vehicle refrigeration equipment. Its operation generates vibration and noise, affecting vehicle noise levels and creating subjective auditory problems. In related technologies, the high-pressure refrigerant discharged from the electric compressor's compression component enters the high-pressure chamber and then leaves the compressor directly through the refrigerant outlet. The exhaust noise and pressure pulsations generated during the electric compressor's operation can easily trigger resonance in various components of the vehicle's thermal management system, leading to vehicle noise and vibration issues. Summary of the Invention

[0003] The present invention aims to at least solve one of the technical problems existing in the prior art. Therefore, one object of the present invention is to provide a high-pressure housing assembly that can improve the exhaust noise and pressure pulsation of an electric compressor.

[0004] The present invention also proposes an electric compressor having the above-mentioned high-pressure housing assembly.

[0005] The present invention also proposes an air conditioning system having the above-mentioned electric compressor.

[0006] The present invention also proposes a vehicle having the above-mentioned air conditioning system.

[0007] According to an embodiment of the present invention, a high-pressure housing assembly for an electric compressor includes: a high-pressure housing having a high-pressure chamber and a refrigerant outlet formed thereon; a compression component of the electric compressor being adapted to discharge compressed refrigerant into the high-pressure chamber; and the refrigerant outlet being used to discharge refrigerant to the outside of the high-pressure housing; the high-pressure housing also having a resonant chamber and an oil separator chamber; an oil separator inlet of the oil separator chamber communicating with the high-pressure chamber; an oil separator outlet of the oil separator chamber located on the inner wall of the resonant chamber; a silencer tube being provided in the resonant chamber; a first end of the silencer tube communicating with the refrigerant outlet and a second end being located in the resonant chamber and communicating with the resonant chamber; refrigerant entering the resonant chamber entering the silencer tube through the second end; and refrigerant in the silencer tube being discharged to the outside of the high-pressure housing through the refrigerant outlet.

[0008] According to the high-pressure housing assembly for an electric compressor in the embodiments of the present invention, by setting a resonant cavity on the high-pressure housing and connecting the resonant cavity to the oil separator cavity, and connecting the lumen of the silencing tube between the resonant cavity and the refrigerant outlet, a cavity structure that satisfies the Helmholtz resonance principle can be formed. This allows the resonant cavity to not only eliminate the noise generated by the refrigerant acting on the high-pressure housing, but also eliminate the noise and pressure pulsation accompanying the gaseous refrigerant. Furthermore, by setting the silencing tube, the silencing effect within the resonant cavity is greatly improved, thereby improving the airflow noise and pressure pulsation on the exhaust side of the electric compressor, and further improving the noise and pressure pulsation of the refrigerant discharged by the electric compressor. This reduces or eliminates the resonance problem of various components in the vehicle thermal management system and improves the safety of the electric compressor.

[0009] In some embodiments, the resonant cavity is connected to the refrigerant outlet via a connecting channel, wherein the cross-sectional area of ​​the connecting channel is smaller than the cross-sectional area of ​​the resonant cavity.

[0010] In some embodiments, the first end of the silencing cannula is fixedly connected to the inner wall of the connection channel.

[0011] In some embodiments, a first opening is formed on the surface of the high-pressure housing for machining the resonant cavity, and the high-pressure housing includes a first end cap covering the first opening.

[0012] In some embodiments, the second end of the silencing cannula is spaced apart from the first end cap.

[0013] In some embodiments, the silencing cannula includes a first connecting pipe section and a silencing pipe section, wherein the outer diameter of the first connecting pipe section is larger than the outer diameter of the silencing pipe section, the first connecting pipe section is fixed to the high-pressure housing, and the peripheral wall of the silencing pipe section is provided with silencing holes.

[0014] In some embodiments, the silencing cannula further includes a first transition section connected between the first connecting section and the silencing section, wherein the outer diameter of the first transition section is configured to gradually decrease from the end connected to the first connecting section to the end connected to the silencing section.

[0015] In some embodiments, the oil separator chamber is provided with an oil separator element for oil-gas separation. The refrigerant entering the oil separator chamber flows to the resonant cavity after being separated into oil and gas by the oil separator element.

[0016] In some embodiments, the oil separator is configured as an oil separator tube, one end of which is fixed to the inner peripheral wall of the oil separator outlet, and the other end of which extends into the oil separator cavity and communicates with the oil separator cavity.

[0017] In some embodiments, the oil separator is configured as an oil separator tube, which includes a second connecting pipe section and an oil separator section. The outer diameter of the second connecting pipe section is larger than the outer diameter of the oil separator section. The second connecting pipe section is fixedly connected to the inner wall of the oil separator cavity, and the oil separator section is suspended in the oil separator cavity and communicates with the oil separator cavity.

[0018] In some embodiments, the oil separator pipe further includes a second transition pipe section connected between the second connecting pipe section and the oil separator pipe section, wherein the outer diameter of the second transition pipe section is configured to gradually decrease from the end connected to the second connecting pipe section to the end connected to the oil separator pipe section.

[0019] In some embodiments, the length direction of the silencing cannula is parallel to the length direction of the resonant cavity, and the length of the silencing cannula extending into the resonant cavity is less than 2 / 3 of the length of the resonant cavity.

[0020] In some embodiments, the resonant cavity is provided with a first oil return channel, which is located in the lower space of the resonant cavity in the direction of gravity.

[0021] In some embodiments, the position of the first oil return channel within the resonant cavity satisfies: h ≤ 0.3H; where 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 direction of gravity, and H is the vertical distance between the highest point and the lowest point of the resonant cavity in the direction of gravity.

[0022] In some embodiments, multiple rings of silencing holes are provided along the axial direction of the silencing tube, and each ring of silencing holes includes multiple silencing holes spaced apart circumferentially along the silencing tube.

[0023] In some embodiments, the center distance t between two adjacent silencing holes satisfies: d≤t≤5d; where d is the equivalent diameter of the hole cross-section of the silencing hole, and when the hole cross-sections of multiple silencing holes are different, d is the equivalent diameter of the silencing hole with the largest hole cross-section.

[0024] In some embodiments, the cross-sectional area of ​​the silencing hole satisfies: 0.05D≤d≤D; where d is the equivalent diameter of the cross-sectional area of ​​the silencing hole, D is the equivalent diameter of the cross-sectional area of ​​the silencing tube, and when the silencing tube is a variable cross-sectional structure, D is located at the equivalent diameter of the minimum cross-sectional area of ​​the silencing tube.

[0025] An electric compressor according to a second aspect of the present invention includes: a housing component, the housing component including a high-pressure housing assembly for an electric compressor according to a first aspect of the present invention; a compression component, the exhaust port of the compression component communicating with the high-pressure chamber to discharge compressed refrigerant into the high-pressure chamber; and a motor component, the motor component including a motor body and a drive shaft, the motor body driving the compression component to perform compression work through the drive shaft.

[0026] In some embodiments, the housing component further includes: a partition plate, wherein the compression component and the motor body are disposed on opposite sides of the partition plate, and the drive shaft passes through the partition plate to connect with the compression component; and a low-pressure housing, wherein a low-pressure cavity for accommodating the motor body is formed between the low-pressure housing and the partition plate, and a refrigerant suction port communicating with the low-pressure cavity is formed on the low-pressure housing, and the compression component draws refrigerant from the low-pressure cavity.

[0027] An air conditioning system according to a third aspect of the present invention includes an electric compressor according to a second aspect of the present invention.

[0028] A vehicle according to a fourth aspect of the present invention includes a vehicle body and an air conditioning system mounted on the vehicle body, wherein the air conditioning system is an air conditioning system according to a third aspect of the present invention.

[0029] The vehicle, the air conditioning system, the electric compressor, and the high-pressure housing assembly for the electric compressor described above all have the same advantages over the prior art, and will not be repeated here.

[0030] 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. Attached Figure Description

[0031] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0032] Figure 1 This is a schematic diagram of the structure of an electric compressor according to an embodiment of the present invention;

[0033] Figure 2 This is a schematic diagram of the high-pressure housing according to Embodiment 1 of the present invention;

[0034] Figure 3 This is a schematic diagram of the high-pressure casing according to Embodiment 2 of the present invention;

[0035] Figure 4 This is a schematic diagram of the high-pressure housing according to Embodiment 3 of the present invention;

[0036] Figure 5 This is a structural schematic diagram (dimension markings) of the high-pressure housing according to Embodiment 4 of the present invention.

[0037] Figure 6 This is a structural schematic diagram (dimension markings) of the high-pressure housing according to Embodiment 3 of the present invention.

[0038] Figure 7 This is a schematic diagram of the high-pressure housing structure according to Embodiment 4 of the present invention;

[0039] Figure 8 This is a partial enlarged view of the sound-absorbing insertion tube at the upper end of the resonant cavity in Embodiment 4 of the present invention.

[0040] Figure label:

[0041] 100 electric compressors;

[0042] High-pressure casing 1;

[0043] High-pressure chamber 11; Refrigerant outlet 12;

[0044] Resonance cavity 13; First opening 131; First oil return channel 132;

[0045] Connect channel 14;

[0046] Oil separator chamber 15; oil separator inlet 151; oil separator outlet 152; second oil return channel 153; second opening 154;

[0047] First end cap 21; pressing part 211; connecting part 212; second end cap 22;

[0048] Oil separator 3; second connecting pipe section 31; second transition pipe section 32; oil separator pipe section 33; silencer insert 4; silencer hole 41; first connecting pipe section 42; first transition pipe section 43; silencer pipe section 44;

[0049] Low-pressure housing 102; refrigerant inlet 1021; partition 103; cover plate 104; low-pressure chamber 105;

[0050] Compression component 20; Exhaust port 201;

[0051] Motor component 30; Motor body 301; Drive shaft 302;

[0052] 40 electronic control components;

[0053] Vehicle body 200; air conditioning system 300; vehicle 1000. Detailed Implementation

[0054] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0055] The following is for reference. Figures 1-8 A high-pressure housing assembly for an electric compressor according to an embodiment of the present invention is described. This high-pressure housing assembly, by providing a resonant cavity 13 and an oil separator 15, can greatly improve the exhaust noise and pressure pulsation of the electric compressor 100, thereby enhancing the user experience.

[0056] like Figures 2-5 As shown, the high-pressure housing assembly includes a high-pressure housing 1, on which a high-pressure chamber 11 and a refrigerant outlet 12 are formed. The compression component 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 outlet 12. Thus, when the electric compressor 100 is powered on and operating normally, it can draw in low-pressure refrigerant, which is then compressed by the compression component 20 to form high-pressure refrigerant. This high-pressure refrigerant is discharged into the high-pressure chamber 11 through the exhaust port 201 of the compression component 20, and finally discharged out of the high-pressure housing 1 through the refrigerant outlet 12.

[0057] The high-pressure housing 1 also includes a resonant cavity 13 and an oil separator 15. The oil inlet 151 of the oil separator 15 is connected to the high-pressure cavity 11, and the oil outlet 152 of the oil separator 15 is located on the inner wall of the resonant cavity 13. A silencer tube 4 is installed inside the resonant cavity 13. The first end of the silencer tube 4 is connected to the refrigerant outlet 12, and the second end is located inside the resonant cavity 13 and connected to the resonant cavity 13. The refrigerant entering the resonant cavity 13 passes through the second end into the silencer tube 4, and the refrigerant in the silencer tube 4 is discharged to the outside of the high-pressure housing 1 through the refrigerant outlet 12. Figures 2-5 As shown, the resonant cavity 13 is formed at the lower left end of the high-pressure housing 1, the oil separator 15 is formed at the lower right end of the high-pressure housing 1, the high-pressure cavity 11 is located between the resonant cavity 13 and the oil separator 15, and the refrigerant outlet 12 is formed at the upper end of the high-pressure housing 1. The upper left end of the oil separator 15 is formed as the oil separator outlet 152. The oil separator outlet 152 is openly arranged in the inner peripheral wall of the upper space of the resonant cavity 13. The upper end of the silencing tube 4 is connected to the refrigerant outlet 12, and the lower end of the silencing tube 4 extends into the resonant cavity 13 and is connected to the resonant cavity 13.

[0058] With the above structural arrangement, the gaseous refrigerant separated from the oil separator 15 can enter the resonant cavity 13 from the oil separator outlet 152. Under the combined action of the inner peripheral wall of the resonant cavity 13 and the outer peripheral wall of the silencer tube 4, the gaseous refrigerant flows downwards into the cavity of the silencer tube 4, and then flows upwards along the cavity of the silencer tube 4 into the refrigerant discharge outlet 12, thus achieving the exhaust function. It should be noted that by setting the resonant cavity 13, a cavity structure that satisfies the Helmholtz resonance principle is formed within the high-pressure housing assembly of the electric compressor. The resonant cavity 13 is connected to the oil separator 15, so that the noise generated by the gaseous refrigerant separated in the oil separator 15 as it passes through the resonant cavity 13 and is discharged to the refrigerant discharge outlet 12 can enter the resonant cavity 13 for elimination or weakening, thereby improving the airflow noise and pulsation on the exhaust side of the electric compressor 100, and further improving the noise and pressure pulsation of the refrigerant discharged by the electric compressor 100. Furthermore, the addition of a silencing tube 4 within the resonant cavity 13 allows the single cavity structure formed by the silencing tube 4 to be divided into a sub-cavity portion located between the outer peripheral wall of the silencing tube 4 and the inner wall of the resonant cavity 13, and a tubular portion of the silencing tube 4. This facilitates differentiated silencing treatment within the resonant cavity 13, improving the noise reduction effect. In other words, by adding the silencing tube 4, the number of silencing chambers within the resonant cavity 13 is increased, thereby multiplying the silencing effect within the resonant cavity 13.

[0059] Therefore, by connecting at least a portion of the resonant cavity 13 and the lumen of the silencer tube 4 in series between the oil separator outlet 152 and the refrigerant outlet 12, the gaseous refrigerant will inevitably pass through the resonant cavity 13 and the lumen of the silencer tube 4 during the flow from the oil separator outlet 152 to the refrigerant outlet 12, thereby effectively eliminating the vibration noise and pressure pulsation accompanying the gaseous refrigerant.

[0060] In other words, after the gaseous refrigerant enters the resonant cavity 13 from the oil separator outlet 152, the vibration noise and pressure pulsation accompanying the gaseous refrigerant can be eliminated once within the flow channel, i.e., by the reflection between the outer peripheral wall of the silencer tube 4 and the inner wall of the resonant cavity 13. Then, as the gaseous refrigerant enters the silencer tube 4 from its lower end, the vibration noise and pressure pulsation accompanying the gaseous refrigerant can be eliminated again by the reflection from the inner wall of the silencer tube 4. Thus, by setting the silencer tube 4, the noise and pulsation elimination effect within the resonant cavity 13 is greatly improved. Therefore, when this electric compressor 100 is used in the vehicle 1000, it can improve the resonance problem of various components in the vehicle 1000's thermal management system caused by the exhaust airflow noise and pressure pulsation of the electric compressor 100, thereby reducing the noise and vibration caused to the vehicle 1000.

[0061] It should be noted that the "Helmholtz resonance principle" is well known to those skilled in the art. Based on the proposal in this application that "a resonance cavity 13 can be set on the high-pressure shell 1 and the resonance cavity 13 can be connected to the oil separator 15, and the lumen of the silencer tube 4 can be connected between the resonance cavity 13 and the refrigerant outlet 12 to form a cavity structure that satisfies the Helmholtz resonance principle", those skilled in the art can match and calculate the specific dimensions that the resonance cavity 13 and the lumen of the silencer tube 4 need to meet according to the specific requirements of different working conditions. Therefore, this application does not limit the specific dimensions.

[0062] According to the high-pressure housing assembly for an electric compressor in the embodiments of the present invention, by providing a resonant cavity 13 on the high-pressure housing 1 and connecting the resonant cavity 13 to the oil separator 15, and connecting the lumen of the silencing tube 4 between the resonant cavity 13 and the refrigerant outlet 12, a cavity structure that satisfies the Helmholtz resonance principle can be formed. This allows the resonant cavity 13 to not only eliminate the noise generated by the refrigerant acting on the high-pressure housing 1, but also to eliminate the noise and pressure pulsation accompanying the gaseous refrigerant. Furthermore, by providing the silencing tube 4, the silencing effect within the resonant cavity 13 is greatly improved, thereby improving the airflow noise and pressure pulsation on the exhaust side of the electric compressor 100, and further improving the noise and pressure pulsation of the refrigerant discharged by the electric compressor 100. This reduces or eliminates the resonance problem of various components in the thermal management system of the vehicle 1000, and improves the safety of the electric compressor 100.

[0063] In some embodiments, a connecting channel 14 is also formed on the high-pressure housing 1. The resonant cavity 13 is connected to the refrigerant outlet 12 through the connecting channel 14. The flow area of ​​the connecting channel 14 is smaller than the flow area of ​​the resonant cavity 13. That is to say, the medium in the resonant cavity 13, such as gaseous refrigerant, can flow to the refrigerant outlet 12 through the connecting channel 14.

[0064] like Figure 2 , Figure 4 and Figure 6 As shown, the connecting channel 14 is located in the upper region of the high-pressure housing 1, and the upper end of the resonant cavity 13 is connected to the connecting channel 14. This allows gaseous refrigerant to enter the connecting channel 14 upwards within the resonant cavity 13 and flow out from the refrigerant outlet 12. It is understood that in this invention, the flow area of ​​the connecting channel 14 is set to be smaller than the flow area of ​​the resonant cavity 13, allowing the first end of the resonant cavity 13 to... Figure 2 The lower end of the resonant cavity 13 is formed by the first end cap 21, which forms an inner end face of the resonant cavity 13. Meanwhile, the second end of the resonant cavity 13 is as follows: Figure 2 The upper end of the cavity forms a stepped surface at the connection with the connecting channel 14, and this stepped surface can serve as another inner end face of the resonant cavity 13.

[0065] Therefore, the first end of the resonant cavity 13 is fitted with the first end cover 21, and the second end of the resonant cavity 13 is fitted with the stepped surface formed between the resonant cavity 13 and the connecting channel 14, so that the resonant cavity 13 can form a cavity structure that satisfies the Helmholtz resonance principle, thereby improving the airflow noise and pressure pulsation on the exhaust side of the electric compressor 100, and further improving the noise and pressure pulsation of the refrigerant discharged by the electric compressor 100.

[0066] In some embodiments, the first end of the silencing cannula 4 is fixedly connected to the inner wall of the connecting channel 14, and the second end of the silencing cannula 4 extends into the resonant cavity 13 and is open into the resonant cavity 13. For example... Figure 2 , Figure 4 and Figure 6 As shown, the resonant cavity 13 is formed on the lower left side of the high-voltage housing 1, and extends obliquely from the lower left to the upper right. The silencing tube 4 is installed inside the resonant cavity 13, and its upper end is fixedly connected to the inner wall of the connecting channel 14, such as by interference fit, threaded connection, or welding. Meanwhile, the lower end of the silencing tube 4 is suspended within the resonant cavity 13, so that the silencing tube 4 is relatively fixed to the high-voltage housing 1.

[0067] The upper end of the silencing cannula 4 is open and located within the connecting channel 14 to communicate with the connecting channel 14, while the lower end of the silencing cannula 4 is open and communicates with the resonant cavity 13. In other words, the resonant cavity 13 is connected to the refrigerant discharge channel through the cavity of the silencer tube 4 and the connecting channel 14. In this way, after the gaseous refrigerant enters the resonant cavity 13, the vibration noise and pressure pulsation accompanying the gaseous refrigerant can first enter the resonant cavity 13. Moreover, some of the vibration noise and pressure pulsation are weakened and eliminated by the reflection of the inner wall of the resonant cavity 13 and the outer peripheral wall of the silencer tube 4. Furthermore, as the gaseous refrigerant enters the cavity of the silencer tube 4 from the resonant cavity 13, the vibration noise and pressure pulsation accompanying the gaseous refrigerant in the cavity of the silencer tube 4 can be weakened and eliminated by the action of the inner wall of the silencer tube 4. Furthermore, the gaseous refrigerant enters the connecting channel 14, and the inner wall of the connecting channel 14 can also eliminate the vibration noise and pressure pulsation. Thus, the propagation path of the gaseous refrigerant is increased, and the silencing effect in the high-pressure shell 1 is improved.

[0068] In other words, by fixing one end of the silencing tube 4 to the connecting channel 14 and extending the other end of the silencing tube 4 into the resonant cavity 13 and communicating with the resonant cavity 13, multiple silencing areas can be formed inside the high-pressure housing 1, achieving segmented silencing and noise reduction, thereby greatly improving the silencing effect inside the high-pressure housing 1.

[0069] In some embodiments, such as Figures 2-7As shown, a first opening 131 is formed on the surface of the high-pressure housing 1. The first opening 131 is used to process the resonant cavity 13. If the high-pressure housing 1 is formed by drilling, a drilling tool can be inserted from the first opening 131 to perform the drilling operation, and the drilling tool can be withdrawn from the first opening 131. Alternatively, if the high-pressure housing 1 is formed by casting, the processing mold of the resonant cavity 13 can be removed from the first opening 131. Thus, by designing the first opening 131, it is beneficial to realize the processing and forming of the resonant cavity 13, to realize the forming of the high-pressure housing 1 by various processing methods, to reduce the processing difficulty and processing cost of the high-pressure housing 1, and to realize the mass production and practical application of the high-pressure housing 1.

[0070] And such as Figures 2-7 As shown, the high-pressure housing 1 includes a first end cap 21 covering the first opening 131. That is, in this invention, the first opening 131 is designed to cooperate with the first end cap 21. After the high-pressure housing 1 is installed in the entire electric compressor 100, the high-pressure chamber 11 is connected to the oil separator chamber 15, and the resonance chamber 13 is connected to the oil separator chamber 15. The resonance chamber 13 is closed at the first opening 131 by the first end cap 21, so that the resonance chamber 13 forms a cavity structure that satisfies the Helmholtz resonance principle.

[0071] In specific design, the resonant cavity 13 can be constructed as a hole shape, with a first opening 131 formed at least one end of the hole in the resonant cavity 13 (this can be understood as the hole shape having two end holes, with one end hole of the resonant cavity 13 communicating with the refrigerant outlet 12, and the other end hole forming the first opening 131); where "the resonant cavity 13 is a hole shape" refers to a three-dimensional hole shape with a certain depth, rather than a planar hole shape, and the two ends of the centerline extension direction of the hole are the two ends of the length direction of the resonant cavity 13. Therefore, the resonant cavity 13 in this invention has a simple structure, is easy to manufacture, and can be manufactured by various methods such as drilling or casting. Its placement is flexible, meeting the design requirements of different models, and it occupies less space. While meeting noise reduction requirements, it can reduce the overall volume and save space inside the vehicle.

[0072] A first machined end face may be formed on the outer side of the high-pressure housing 1, and a first opening 131 is formed open on the first machined end face, such as... Figures 2-7As shown, the first machining end face is a machining plane located on the outer side of the high-pressure housing 1. Its surface is smooth and regular, making it less likely to interfere with the drilling tool or mold, thus facilitating the user's removal of the drilling tool or mold. The first end cap 21 includes a pressing part 211 and a connecting part 212, which are integrally formed. The pressing part 211 is disc-shaped, and the connecting part 212 is cylindrical. The end face of the pressing part 211 is fixedly connected to the end face of the connecting part 212. The outer diameter of the pressing part 211 is larger than the outer diameter of the connecting part 212 to form a limiting surface at the connection point. During assembly, the connecting part 212 can be extended into the first opening 131 and fixedly connected to the inner peripheral wall of the first opening 131. Simultaneously, the pressing part 211 is located outside the first opening 131 and presses against the first machining end face.

[0073] In a specific design, the connecting part 212 can be threadedly connected to the inner peripheral wall of the first opening 131, so that the connecting part 212 can be detached or installed from the first opening 131 by rotation. Alternatively, the connecting part 212 can be interference-fitted with the inner peripheral wall of the first opening 131, that is, the connecting part 212 can be pressed into the first opening 131 to be tightly squeezed with the inner peripheral wall of the first opening 131, thereby ensuring the connection stability of the first end cap 21 at the first opening 131. The design of the limiting surface of the pressing part 211 and the first processing end face allows the first end cover 21 to be positioned relative to the high-pressure housing 1. When the connecting part 212 is in the maximum position within the first opening 131, the pressing part 211 presses against the first processing end face, preventing the first end cover 21 from extending too far or even completely into the first opening 131. This effectively keeps part of the pressing part 211 of the first end cover 21 outside the first opening 131, ensuring that the relative position of the first end cover 21 and the high-pressure housing 1 is fixed. It also facilitates the user's operation of the pressing part 211 to install and remove the first end cover 21, thus improving the rationality of the structural design.

[0074] In some embodiments, the second end of the silencer tube 4 is spaced apart from the first end cap 21, that is, the end face of the end of the silencer tube 4 that extends into the resonant cavity 13 and is suspended is spaced apart from the end face of the first end cap 21 facing into the resonant cavity 13, so that an airflow area is formed between the second end of the silencer tube 4 and the first end cap 21.

[0075] It is understood that the silencer tube 4 is located inside the resonant cavity 13, and the upper end of the silencer tube 4 is fixedly connected to the connecting channel 14, that is, the upper end of the silencer tube 4 is in a closed state relative to the resonant cavity 13. Thus, the lower end of the silencer tube 4 is set to be spaced apart from the first end cap 21. At the same time, the oil separator outlet 152 is located in the upper region of the inner wall of the resonant cavity 13. In this way, the separated gaseous refrigerant can enter the resonant cavity 13 from the upper space of the resonant cavity 13, and flow downward along the resonant cavity 13 under the guidance of the inner wall of the resonant cavity 13 and the outer peripheral wall of the silencer tube 4. After flowing downward to the lower part of the silencer tube 4, it enters the silencer tube 4 from the lower end of the silencer tube 4, so as to further flow along the lumen of the silencer tube 4, the connecting channel 14 and the refrigerant outlet 12 in sequence.

[0076] In some embodiments, the silencer cannula 4 includes a first connecting section 42 and a silencer section 44, and the first connecting section 42 and the silencer section 44 are integral structures, that is, the first connecting section 42 and the silencer section 44 are jointly processed and formed. The outer diameter of the first connecting section 42 is larger than the outer diameter of the silencer section 44, such as... Figure 3 , Figure 5 and Figure 7 As shown, the first connecting pipe section 42 forms the upper part of the silencing insertion tube 4, and the silencing pipe section 44 forms the lower part of the silencing insertion tube 4. The first connecting pipe section 42 is fixed inside the high-pressure housing 1, as shown. Figure 3 As shown, the upper end of the first connecting pipe section 42 is fixedly connected to the inner peripheral wall of the upper end of the resonant cavity 13. Meanwhile, the silencing pipe section 44 is suspended in the resonant cavity 13, and the lower end face of the silencing pipe section 44 is spaced apart from the first end cap 21.

[0077] Specifically, by setting the outer diameter of the first connecting pipe section 42 to be larger than that of the silencer pipe section 44, it is possible to install and fix the first connecting pipe section 42 in the resonant cavity 13 without needing to design a gradual change in the inner wall size of the resonant cavity 13 when connecting the first connecting pipe section 42 to the inner wall of the resonant cavity 13. The outer peripheral wall of the silencer pipe section 44 can also be spaced apart from the inner peripheral wall of the resonant cavity 13 to form an airflow channel between the inner wall of the resonant cavity 13 and the outer peripheral wall of the silencer pipe section 44. Furthermore, the lower end of the silencer pipe section 44 is open to ensure that the gaseous refrigerant at the oil separator outlet 152 can effectively enter the cavity of the silencer insertion tube 4.

[0078] Furthermore, in actual design, a silencer hole 41 can be provided on the outer peripheral wall of the silencer section 44. This means that the cavity of the silencer tube 4 can be connected to the resonance cavity 13 not only through the lower end of the silencer section 44, but also through the silencer hole 41 located in the silencer section 44. This allows the gaseous refrigerant to flow along different paths between the oil separator outlet 152 and the refrigerant outlet 12, enriching the airflow patterns and increasing exhaust efficiency. Moreover, by providing the silencer hole 41, the airflow entering the silencer cavity through the silencer hole 41 and the airflow entering the silencer cavity without passing through the silencer hole 41 can collide with each other, achieving internal dissipation of vibration energy and improving the silencing effect.

[0079] In some embodiments, the silencing cannula 4 further includes a first transition section 43 connected between the first connecting section 42 and the silencing section 44, wherein the outer diameter of the first transition section 43 is configured to gradually decrease from the end connected to the first connecting section 42 to the end connected to the silencing section 44. Figure 2 , Figure 5 and Figure 7 As shown, the first transition pipe section 43 is constructed in an open shape, and the outer diameter of the lower end of the first transition pipe section 43 is the same as the outer diameter of the silencer pipe section 44, and the outer diameter of the upper end of the first transition pipe section 43 is the same as the outer diameter of the first connecting pipe section 42. The overall outer diameter of the first transition pipe section 43 is a gradient design.

[0080] This allows for a smooth transition of the outer diameter of the silencer cannula 4 in the axial direction, avoiding abrupt changes in the outer diameter design, ensuring relatively balanced radial dimension changes at various positions in the axial direction of the silencer cannula 4, and improving the overall structural strength of the silencer cannula 4.

[0081] In the actual design, the axial dimension of the silencing pipe section 44 is much larger than that of the first connecting pipe section 42, and the axial dimension of the first connecting pipe section 42 is the same as or close to that of the first transition pipe section 43. That is, most of the length of the silencing insert 4 is the silencing pipe section 44, which helps to enhance the silencing effect.

[0082] Among them, such as Figures 2-7 As shown, the high-pressure housing 1 includes a second end cap 22 covering the second opening 154. That is, in this invention, the second opening 154 is designed to cooperate with the second end cap 22. After the high-pressure housing 1 is installed in the entire electric compressor 100, the high-pressure chamber 11 is connected to the oil inlet 151 of the oil separator chamber 15, and the resonant chamber 13 is connected to the oil inlet 151 of the oil separator chamber 15. The second end cap 22 closes the second opening 154, ensuring that the oil separator chamber 15 has a stable sealing state, thereby ensuring the reliability of the oil separation effect.

[0083] Furthermore, a second machined end face is formed on the outer side of the high-pressure housing 1, and a second opening 154 is formed open on the second machined end face, such as... Figures 2-7 As shown, the second machining end face is a machining plane located on the outer side of the high-pressure housing 1. Its surface is smooth and regular, making it less likely to interfere with the drilling tool or mold, thus facilitating the user's removal of the drilling tool or mold. The second end cap 22 can be constructed with the same structural shape as the first end cap 21, and the fitting method between the second end cap 22 and the second opening 154 is the same as the fitting method between the first end cap 21 and the first opening 131, which will not be described further here.

[0084] In some embodiments, such as Figures 2-7 As shown, the oil separator chamber 15 is equipped with an oil separator component 3 for oil-gas separation. The oil separator component 3 is used to improve the oil separation effect in the oil separator chamber 15. The refrigerant in the oil separator chamber 15 can first pass through the oil separator component 3 for oil-gas separation and then be discharged from the oil separator outlet 152. That is, after the high-pressure refrigerant in the high-pressure chamber 11 enters the oil separator chamber 15, under the separation action of the oil separator component 3, the separated oil is deposited downwards into the bottom space of the oil separator chamber 15 and flows back from the second oil return channel 153 in the oil separator chamber 15 towards the space where the compression component 20 is located. The separated gaseous refrigerant is discharged upwards towards the oil separator outlet 152.

[0085] In some embodiments, the oil separator 3 is constructed as a hollow tubular structure, such as an oil separator tube. The axial direction of the oil separator 3 is parallel to the length direction of the oil separator cavity 15, that is, the axis of the lumen of the oil separator tube is parallel to the axis of the oil separator cavity 15. The oil inlet 151 is located on the outer side of the peripheral wall of the oil separator 3. In other words, the oil inlet 151 is located on the outer peripheral wall of the oil separator cavity 15 and on the radial outer side of the oil separator tube.

[0086] Furthermore, such as Figure 2 , Figure 4 and Figure 6 As shown, after the oil separator cannula is installed in the oil separator chamber 15, the oil separator cannula is located in the upper space of the oil separator chamber 15. The upper end of the oil separator cannula is connected and fixed to the upper end of the oil separator chamber 15, and the lower end of the oil separator cannula is suspended in the oil separator chamber 15. Both ends of the oil separator cannula are open. The upper end of the oil separator cannula is connected to the oil separator outlet 152, and the lower end of the oil separator cannula is connected to the oil separator chamber 15. Figure 2 , Figure 4 and Figure 6 As shown, the oil separator inlet 151 is located at a height between the upper and lower ends of the oil separator tube. The flow area of ​​the oil separator outlet 152 is smaller than the flow area of ​​the oil separator chamber 15. This ensures that after the upper end of the oil separator tube is connected and fixed to the oil separator outlet 152, the lower end of the oil separator tube is separated from the inner peripheral wall of the oil separator chamber 15, forming a flow channel for the high-pressure refrigerant. This guarantees that the oil separator inlet 151 can enter the oil separator chamber 15 from the inner peripheral wall for separation.

[0087] In this way, after the high-pressure refrigerant in the high-pressure chamber 11 enters the oil separator chamber 15, the high-pressure refrigerant acts on the outer peripheral wall of the oil separator tube at a high flow rate. Guided by the outer peripheral wall of the oil separator tube and its own gravity, it moves downward and moves to the space below the lower end of the oil separator tube. Then, under the action of the internal pressure of the oil separator chamber 15, the separated gaseous refrigerant enters the lumen of the oil separator tube and is discharged upward from the oil separator outlet 152. Meanwhile, the oil separated from the high-pressure refrigerant is deposited downward along the outer peripheral wall of the oil separator tube or the inner peripheral wall of the oil separator chamber 15 into the bottom space of the oil separator chamber 15, and then flows back from the second oil return channel 153 to the space where the compression component 20 is located, thus realizing oil-gas separation.

[0088] It can be understood that the oil separator inlet 151 and the outer peripheral wall of the oil separator tube are arranged radially opposite each other, so that the high-pressure refrigerant entering the oil separator chamber 15 from the oil separator inlet 151 directly acts on the outer peripheral wall of the oil separator tube, and flows towards the inner peripheral wall of the oil separator chamber 15 under the guidance of the oil separator tube, forming a circumferential swirling flow along the inner peripheral wall of the oil separator chamber 15. This accelerates the separation of oil and gas during the circumferential swirling flow, which helps to enhance the oil and gas separation effect.

[0089] In actual design, such as Figures 2-7 As shown, the axial length of the oil separator tube is set to be no less than half the axial length of the oil separator chamber 15. This ensures that the high-pressure refrigerant has sufficient flow path to achieve oil-gas separation after entering the oil separator chamber 15, thereby reducing the amount of oil accompanying the gaseous refrigerant, which in turn reduces the amount of oil entering the resonant chamber 13.

[0090] In some embodiments, the oil separator 3 is configured as an oil separator tube, which includes a second connecting pipe section 31 and an oil separator section 33, and the second connecting pipe section 31 and the oil separator section 33 are integrally formed, that is, the second connecting pipe section 31 and the oil separator section 33 are jointly processed and formed. The outer diameter of the second connecting pipe section 31 is larger than the outer diameter of the oil separator section 33, such as... Figure 3 , Figure 5 and Figure 7 As shown, the second connecting pipe section 31 forms the upper part of the oil separator insertion pipe, and the oil separator pipe section 33 forms the lower part of the oil separator insertion pipe. The second connecting pipe section 31 is fixed inside the high-pressure housing 1, as shown. Figure 3 As shown, the upper end of the second connecting pipe section 31 is fixedly connected to the inner peripheral wall of the upper end of the oil separator chamber 15. Meanwhile, the oil separator pipe section 33 is suspended in the oil separator chamber 15, and the lower end face of the oil separator pipe section 33 is spaced apart from the lower end face of the oil separator chamber 15.

[0091] Specifically, by setting the outer diameter of the second connecting pipe section 31 to be larger than that of the oil separator pipe section 33, it is possible to install and fix the second connecting pipe section 31 in the oil separator chamber 15 without needing to design a gradual change in the inner wall size of the oil separator chamber 15 when connecting the second connecting pipe section 31 to the inner wall of the oil separator chamber 15. The outer peripheral wall of the oil separator pipe section 33 can also be spaced apart from the inner peripheral wall of the oil separator chamber 15 to form an airflow channel between the inner wall of the oil separator chamber 15 and the outer peripheral wall of the oil separator pipe section 33. Furthermore, the lower end of the oil separator pipe section 33 is open to ensure that the gaseous refrigerant at the oil separator outlet 152 can effectively enter the lumen of the oil separator pipe.

[0092] In some embodiments, the oil separator cannula further includes a second transition section 32 connected between the second connecting section 31 and the oil separator section 33, wherein the outer diameter of the second transition section 32 is configured to gradually decrease from the end connected to the second connecting section 31 to the end connected to the oil separator section 33. Figure 2 , Figure 5 and Figure 7 As shown, the second transition pipe section 32 is constructed in an open shape, and the outer diameter of the lower end of the second transition pipe section 32 is the same as the outer diameter of the oil separation pipe section 33, and the outer diameter of the upper end of the second transition pipe section 32 is the same as the outer diameter of the second connecting pipe section 31. The overall outer diameter of the second transition pipe section 32 is a gradually changing design.

[0093] This allows for a smooth transition of the outer diameter of the oil separator pipe in the axial direction, avoiding abrupt changes in the outer diameter design and ensuring relatively balanced radial dimension changes at various axial positions of the oil separator pipe, thereby improving the overall structural strength of the oil separator pipe. In actual design, the axial dimension of the oil separator section 33 is much larger than that of the second connecting section 31, and the axial dimension of the second connecting section 31 is the same as or close to that of the second transition section 32. That is, the majority of the oil separator pipe along its length is the oil separator section 33, which helps to enhance the noise reduction effect.

[0094] In some embodiments, the length direction of the silencing cannula 4 is parallel to the length direction of the resonant cavity 13, such as... Figure 4 and Figure 5 As shown, the silencing tube 4 is constructed as a circular tube, and the resonant cavity 13 is constructed as a circular cavity. The axis of the silencing tube 4 coincides with the axis of the resonant cavity 13, that is, the silencing tube 4 is installed in the center within the resonant cavity 13.

[0095] like Figure 6As shown, the length L1 of the silencer tube 4 extending into the resonant cavity 13 is less than 2 / 3 of the extension length L0 of the resonant cavity 13. For example, the length L1 of the silencer tube 4 extending into the resonant cavity 13 is 1 / 2 of the extension length L0 of the resonant cavity 13, or the length L1 of the silencer tube 4 extending into the resonant cavity 13 is 1 / 3 of the extension length L0 of the resonant cavity 13. That is to say, in this invention, the extension length of the silencer tube 4 is significantly less than the extension length of the resonant cavity 13. In this way, by setting the silencer tube 4, the resonant cavity 13 can be defined into three parts: first, the internal space of the tube 4; second, the space between the lower end of the silencer tube 4 and the lower end face of the resonant cavity 13; and third, the space between the outer peripheral wall of the silencer tube 4 and the inner peripheral wall of the upper part of the resonant cavity 13.

[0096] In other words, by setting a silencing tube 4 with a length shorter than that of the resonant cavity 13, three types of silencing cavities can be formed in the resonant cavity 13, thereby producing three different types of silencing effects, enriching the silencing methods in the resonant cavity 13, and achieving better silencing effects compared to a single silencing chamber structure.

[0097] In some embodiments, a first oil return channel 132 is provided within the resonant cavity 13, and the first oil return channel 132 is located in the bottom space of the resonant cavity 13 in the direction of gravity, such as... Figure 7 As shown, the first oil return channel 132 is located at the lower end of the resonant cavity 13, that is, the inlet end of the first oil return channel 132 is located on the inner peripheral wall of the resonant cavity 13 and is open towards the inside of the resonant cavity 13, so that the oil deposited in the resonant cavity 13 can flow out through the first oil return channel 132 and flow back to the space where the compression component 20 is located.

[0098] The first oil return channel 132 extends towards the compression component 20 in the bottom space of the resonant cavity 13, and the axis of the first oil return channel 132 forms a certain angle with the axis of the resonant cavity 13. The first oil return channel 132 extends 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 constructed with the lower end open to form a first opening 131. In this way, 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 on the lower side of the high-pressure housing 1, thereby reducing the processing difficulty.

[0099] In actual design, the first oil return channel 132 is lower than the oil outlet 152. That is, in the design where the oil outlet 152 is located on the inner peripheral wall of the connecting channel 14 or the inner peripheral wall of the resonant cavity 13, the oil outlet 152 is higher than the first oil return channel 132. This design allows the oil entering the resonant cavity 13 at the oil outlet 152 to be deposited in the resonant cavity 13 and then effectively flow back to the space where the compression component 20 is located through the first oil return channel 132. In addition, the inlet end of the first oil return channel 132 is spaced apart from the lower end face of the resonant cavity 13 by a certain distance, so that after the first end cap 21 is installed on the first opening 131, the first end cap 21 is spaced apart from the first oil return channel 132 to avoid the first end cap 21 being installed too deeply and causing blockage of the first oil return channel 132.

[0100] In some embodiments, the position of the first oil return channel 132 within the resonant cavity 13 satisfies: h ≤ 0.3H; wherein, as shown in the figure... Figure 6 and Figure 7 As shown, 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 direction of gravity, and H is the vertical distance between the highest and lowest points of the resonant cavity 13 in the direction of gravity. Figure 3 As shown, the first oil return channel 132 is located in the bottom space inside the resonant cavity 13, that is, the first oil return channel 132 is spaced apart from the upper end of the resonant cavity 13 and from the lower end of the resonant cavity 13, and the ratio of the vertical distance between the first oil return channel 132 and the lowest point of the resonant cavity 13 to the vertical distance between the highest point and the lowest point of the resonant cavity 13 is less than 0.3, such as 0.28, 0.25 or 0.2.

[0101] Therefore, by setting the position of the first oil return channel 132 within the resonant cavity 13 within the aforementioned range, the inlet end of the first oil return channel 132 can be positioned relatively low within the resonant cavity 13, ensuring that the oil deposited within the resonant cavity 13 can flow out through the first oil return channel 132, thus avoiding excessive oil deposits within the resonant cavity 13 that could cause excessive pressure on the first end cap 21, and ensuring the effectiveness of oil return.

[0102] In actual design, at least one first oil return channel 132 can be set, that is, one first oil return channel 132 can be set on the outer peripheral wall of the resonant cavity 13, or two, three or even more first oil return channels 132 can be set to ensure the oil return volume, prevent the blockage of a single first oil return channel 132 from causing the inability to return oil normally, and improve the reliability of oil return.

[0103] In this 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 on the inner peripheral wall of the connecting channel 14, the oil outlet 152 is at a higher height, resulting in less oil entering the resonance cavity 13, and the first oil return channel 132 is at a higher height. Alternatively, if the oil outlet 152 is located on the inner peripheral wall of the resonance cavity 13, the oil outlet 152 is at a lower height, resulting in more oil entering the resonance cavity 13, and the first oil return channel 132 is at a lower height to ensure timely oil return. Here, "higher" and "lower" refer to a comparison between two different settings, not necessarily an absolute higher or lower.

[0104] In some embodiments, multiple rings of silencing holes 41 are provided along the axial direction of the silencing tube 4, that is, multiple rings of silencing holes 41 are provided on the outer peripheral wall of the silencing tube 4, and the multiple rings of silencing holes 41 are spaced apart along the axial direction of the silencing tube 4. This increases the flow cross-section between the lumen of the silencing tube 4 and the flow channel, ensuring the flow efficiency of the gaseous refrigerant. In actual design, the multiple rings of silencing holes 41 can be evenly spaced along the axial direction of the silencing tube 4 to ensure the balance of airflow at various positions along the axial direction of the silencing tube 4, and to make the silencing effect at various positions of the silencing tube 4 more uniform.

[0105] Each ring of silencer holes 41 includes multiple silencer holes 41, and the multiple silencer holes 41 in each ring are spaced apart along the circumference of the silencer tube 4. This allows airflow to occur at different positions along both the axial and circumferential directions of the silencer tube 4. Furthermore, by distributing a large number of silencer holes 41 along the axial and circumferential directions of the silencer tube 4, the flow rate of gaseous refrigerant from the flow channel to the silencer tube 4 is increased, achieving rapid exhaust.

[0106] In some embodiments, in the multi-turn silencer hole 41, such as Figure 8 As shown, the center distance t between adjacent silencing holes 41 satisfies: d ≤ t ≤ 5d; where, as Figure 8 As shown, d is the equivalent diameter of the cross-section of the silencing hole 41. That is, the ratio of the center distance between two adjacent silencing holes 41 to the equivalent diameter of the cross-section of the silencing hole 41 is in the range of 1 to 5, such as setting t to 2d or 3d.

[0107] Understandably, the silencing holes 41 are formed by hollowing out the outer peripheral wall of the silencing tube 4. By setting the silencing holes 41, it is not only beneficial to allow the gaseous refrigerant to flow between the flow channel and the cavity of the silencing tube 4, but also to reduce the weight of the silencing tube 4, achieving a lightweight design. Setting the center distance of the silencing holes 41 within the aforementioned range not only ensures the air intake of the silencing tube 4, but also avoids the structural strength of the silencing tube 4 being too low due to an excessive number of silencing holes 41, preventing the silencing tube 4 from breaking due to excessive vibration during the operation of the electric compressor 100.

[0108] Furthermore, when the cross-sectional sizes of multiple silencing holes 41 are different, d is the equivalent diameter of the silencing hole 41 with the largest cross-sectional area. That is, in actual design, when the inner diameters of different silencing holes 41 are the same, the diameters of multiple silencing holes 41 can be set to be the same, and d is the equivalent diameter of any one of the silencing holes 41. However, when at least two of the multiple silencing holes 41 have different diameters, d is the equivalent diameter of the silencing hole 41 with the largest cross-sectional area. Thus, a comparative design of the center distance and hole diameter of the silencing holes 41 can be achieved. It should be noted that the silencing holes 41 in this invention can be constructed as circular holes, square holes, or other irregularly shaped holes. The equivalent diameter is the diameter of a circular hole with the same cross-sectional area corresponding to a square hole or other irregularly shaped hole.

[0109] In some embodiments, such as Figure 8 As shown, the cross-section of the silencing hole 41 satisfies: 0.05D≤d≤D; where, as Figure 8 As shown, d is the equivalent diameter of the cross-section of the silencing hole 41, and D is the equivalent diameter of the cross-section of the silencing tube 4. That is, the ratio between the equivalent diameter of the cross-section of the silencing hole 41 and the equivalent diameter of the cross-section of the silencing tube 4 is 0.05~1, such as d being set to 0.1D or 0.2D.

[0110] By setting the cross-sectional dimensions of the silencing hole 41 within the aforementioned range, the equivalent diameter of the silencing hole 41's cross-section is made more reasonable relative to the equivalent diameter of the silencing tube 4's cross-section. This avoids the problem of the silencing hole 41 being too small, resulting in a significant difference between the flow rate of the gaseous refrigerant flowing through the silencing hole 41 and the flow rate at the second end of the tube cavity. It ensures that the gaseous refrigerant can be discharged sequentially from the oil separator outlet 152, the flow channel, the silencing hole 41, the tube cavity, and the refrigerant outlet 12. Furthermore, it avoids the problem of the silencing hole 41 being too large, resulting in insufficient structural strength of the silencing tube 4. This prevents the silencing tube 4 from cracking due to excessive vibration during the operation of the electric compressor 100, thus improving the safety of the silencing tube 4.

[0111] Furthermore, when the silencer tube 4 has a variable cross-section structure, D is the equivalent diameter of the minimum cross-section of the silencer tube 4. That is, the silencer tube 4 in this invention can be constructed as a constant cross-section tube, and when it is a constant cross-section tube, the equivalent diameter at any position of the cross-section of the silencer tube 4 is D; the silencer tube 4 can also be constructed as a variable cross-section tube, and when it is a variable cross-section tube, the diameter at the minimum cross-section of the silencer tube 4 is D. It should be noted that the cross-section of the silencer tube 4 in this invention can be constructed as a circular cross-section, a square cross-section, or other irregularly shaped cross-sections, and the equivalent diameter is the diameter of a circular cross-section with the same cross-sectional area as the square cross-section or other irregularly shaped cross-section.

[0112] Below, please refer to the appendix. Figure 1 The electric compressor 100 according to a second aspect embodiment of the present invention is described.

[0113] like Figure 1 As shown, the electric compressor 100 may include a housing component, a compression component 20, and a motor component 30. The housing component includes a high-pressure housing assembly for the electric compressor according to any embodiment of the first aspect described above. The exhaust port 201 of the compression component 20 communicates with the high-pressure chamber 11 to discharge compressed refrigerant into the high-pressure chamber 11. The motor component 30 includes a motor body 301 and a drive shaft 302. The motor body 301 drives the compression component 20 to perform compression work through the drive shaft 302. Thus, by providing the high-pressure housing 1, the exhaust airflow noise and pressure pulsation generated during the operation of the electric compressor 100 can be effectively improved.

[0114] It should be noted that the specific type of electric compressor 100 is not limited. For example, it can be a horizontal compressor with its central axis extending laterally or slightly inclined to the horizontal line, or a vertical compressor with its central axis extending vertically or slightly inclined to the vertical line, etc.

[0115] It is worth noting that the specific type of electric compressor 100 is not limited. For example, it can be a rotary compressor or a scroll compressor, etc. When the electric compressor 100 is a rotary compressor (this example is not shown in the figure), the compression component 20 can include a cylinder, piston, vanes, etc., and the drive shaft 302 drives the piston to roll in the cylinder. When the electric compressor 100 is a scroll compressor (e.g. Figure 1 (As shown in the example), the compression component 20 may include a stationary scroll plate, a moving scroll plate, a drive shaft 302 driving the moving scroll plate to rotate, and so on.

[0116] It should be noted that the relative positional relationship between the high-pressure housing 1 and the compression component 20 is not limited. For example, the compression component 20 can be located completely outside the high-pressure housing 1, or the compression component 20 can be located at least partially outside the high-pressure housing 1, etc., so as to meet the different design requirements of different models.

[0117] In some embodiments, such as Figure 1 As shown, the housing component also includes: a middle partition 103 and a low-pressure housing 102. The compression component 20 and the motor body 301 are respectively placed on both sides of the middle partition 103. The drive shaft 302 passes through the middle partition 103 to connect with the compression component 20. A low-pressure cavity 105 is formed between the low-pressure housing 102 and the middle partition 103 to accommodate the motor body 301. A refrigerant suction port 1021 communicating with the low-pressure cavity 105 is formed on the low-pressure housing 102. The compression component 20 draws refrigerant from the low-pressure cavity 105. A cover plate 104 is also connected to the low-pressure housing 102. The cover plate 104 and the low-pressure housing 102 define an installation space. An electronic control component 40 is installed in the installation space.

[0118] Therefore, the electric compressor 100 can be a low back pressure compressor. This type of compressor is beneficial for the application of new energy vehicles 1000 such as pure electric vehicles and hybrid vehicles. When used in these vehicles 1000, it can improve the exhaust airflow noise and pressure pulsation caused by the electric compressor 100, improve the resonance problem of the vehicle 1000's thermal management system, and improve the noise and vibration caused to the vehicle 1000.

[0119] In some embodiments, such as Figure 1 As shown, the partition 103 is sandwiched between the low-pressure housing 102 and the compression component 20, while the high-pressure housing 1 is located on the side of the compression component 20 opposite to the partition 103. This simplifies the structure, simplifies assembly, reduces size, improves production efficiency, and enhances connection reliability. For example, this structure can be applied to scroll compressors, but the structure of scroll compressors is not limited to this.

[0120] Furthermore, such as Figure 1 As shown, the high-pressure housing 1 has a housing end face, on which a high-pressure cavity 11 is formed. The high-pressure cavity 11 is open to the compression component 20. The compression component 20 is sealed to the housing end face. The exhaust port 201 of the compression component 20 is open to the high-pressure cavity 11, thereby enabling communication between the exhaust port 201 and the high-pressure cavity 11.

[0121] Hereinafter, with reference to the accompanying drawings, an air conditioning system 300 according to a third aspect embodiment of the present invention will be described.

[0122] The air conditioning system 300 may include an electric compressor 100 according to any embodiment of the second aspect of the present invention. Since the exhaust noise and pressure pulsation of the electric compressor 100 according to any embodiment 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 problems caused to the air conditioning system 300 due to the exhaust airflow noise and pressure pulsation of the electric compressor 100 can be improved.

[0123] It should be noted that the specific application scenarios of the air conditioning system 300 according to the embodiments of the present invention are not limited, such as indoor air conditioning, indoor refrigerator, vehicle air conditioning, etc. Once the application scenario is determined, those skilled in the art can know other components of the air conditioning system 300. For example, when used for indoor air conditioning or indoor refrigerator, it may also include an evaporator, a condenser, a throttling element, etc. For example, when used for vehicle air conditioning, it may also include at least one of an in-vehicle condenser, an in-vehicle evaporator, an external condenser, an external evaporator, a throttling component, etc., which will not be elaborated here.

[0124] Hereinafter, a vehicle 1000 according to a fourth aspect embodiment of the present invention will be described with reference to the accompanying drawings.

[0125] 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 includes an air conditioning system 300 according to any embodiment of the third aspect of the present invention. Since the exhaust noise and pressure pulsation of the electric compressor 100 included in the air conditioning system 300 according to any embodiment of the third aspect of the present invention can be improved, when the air conditioning system 300 is used in vehicle 1000, it can improve the resonance problem of various components in the thermal management system of vehicle 1000 caused by the exhaust airflow noise and pressure pulsation of the electric compressor 100, thereby improving the noise and vibration caused to vehicle 1000. Optionally, the electric compressor 100 is used to compress at least one refrigerant selected from R134a, R744, R290, and R1234yf, thereby meeting the requirements for vehicle use.

[0126] It should be noted that the specific type of vehicle 1000 according to the embodiments of the present invention is not limited. For example, it can be a new energy vehicle, which may include pure electric vehicles, hybrid vehicles, etc., which will not be elaborated here. In addition, once the type of vehicle 1000 is specifically determined, those skilled in the art will know the other components of vehicle 1000, which will not be elaborated here.

[0127] Below, in conjunction with the appendix Figures 2-7 The high-pressure housing assembly of an electric compressor for a vehicle 1000 is described in some specific embodiments of the present invention.

[0128] Example 1

[0129] like Figure 2As shown, a high-pressure chamber 11 and a refrigerant outlet 12 are formed on the high-pressure housing 1. The high-pressure chamber 11 is located in the lower region of the high-pressure housing 1, and the refrigerant outlet 12 is located in the upper region of the high-pressure housing 1. A resonant chamber 13 and an oil separator 15 are also formed on the high-pressure housing 1. The high-pressure chamber 11 is located between the resonant chamber 13 and the oil separator 15. The resonant cavity 13 is formed on the left side of the high-pressure housing 1 and extends obliquely from the lower left to the upper right of the high-pressure housing 1. At the same time, the oil separator 15 is formed on the right side of the high-pressure housing 1 and extends obliquely from the lower right to the upper left of the high-pressure housing 1. The outer peripheral wall of the oil separator 15 is provided with an oil separator inlet 151, which connects the high-pressure housing 11 and the oil separator 15. An oil separator outlet 152 is provided at the upper end of the oil separator 15, which connects the oil separator 15 and the upper space of the resonant cavity 13. A connecting channel 14 is provided at the upper end of the resonant cavity 13, which connects the resonant cavity 13 and the refrigerant outlet 12.

[0130] Among them, such as Figure 2 As shown, the lower end of the resonant cavity 13 is open, forming a first opening 131. The first opening 131 is located at the lower left of the high-pressure housing 1 and is used for machining the resonant cavity 13. A first end cap 21 is provided at the first opening 131 to close the lower end of the resonant cavity 13. A silencing tube 4 is provided inside the resonant cavity 13. The upper end of the silencing tube 4 extends into the connecting channel 14 and is fixedly connected to the inner wall of the connecting channel 14, such as by interference fit. At the same time, the lower end of the silencing tube 4 extends into the resonant cavity 13, and the lower end face of the silencing tube 4 is spaced apart from the first end cap 21. The first end cap 21 includes a pressing part 211 and a connecting part 212. The pressing part 211 forms a limiting surface at the position where it is connected to the connecting part 212. The connecting part 212 is interference-fitted with the inner peripheral wall of the first opening 131. The limiting surface of the pressing part 211 is in a pressing fit with the first machined end face.

[0131] A first oil return channel 132 is provided in the resonant cavity 13. The first oil return channel 132 is located in the lower space of the resonant cavity 13, connecting the resonant cavity 13 with the space where the compression component 20 is located, so as to realize the oil return function in the resonant cavity 13. A second oil return channel 153 is provided in the oil separator 15, connecting the oil separator 15 with the space where the compression component 20 is located, so that the oil deposited in the second oil return channel 153 can return from the second oil return channel 153 to the space where the compression component 20 is located. At the same time, the lower end of the oil separator 15 is open, forming a second opening 154. The second opening 154 is located at the lower right of the high-pressure housing 1, and the second opening 154 is used to process the oil separator 15. A second end cap 22 is provided at the second opening 154, which is used to close the lower end of the oil separator 15. The second end cap 22 has the same structure as the first end cap 21.

[0132] Example 2

[0133] like Figure 3 As shown, the differences between this second embodiment and the first embodiment are as follows: the upper end of the resonant cavity 13 is directly connected to the refrigerant outlet 12, that is, no connecting channel 14 is provided between the resonant cavity 13 and the refrigerant outlet 12; the upper end of the silencing tube 4 is fixedly connected to the inner wall of the upper space of the resonant cavity 13; the silencing tube 4 includes a first connecting pipe section 42, a first transition pipe section 43, and a silencing pipe section 44; the outer diameter of the first connecting pipe section 42 is larger than the outer diameter of the silencing pipe section 44; the outer diameter of the first transition pipe section 43 is constructed to gradually decrease from the end connected to the first connecting pipe section 42 to the end connected to the silencing pipe section 44; the upper end of the first connecting pipe section 42 is fixedly connected to the inner peripheral wall of the upper end of the resonant cavity 13; the silencing pipe section 44 is suspended in the resonant cavity 13, and the lower end face of the silencing pipe section 44 is spaced apart from the first end cap 21.

[0134] Furthermore, the upper end of the oil separation chamber 15 is directly connected to the upper space of the resonance chamber 13, that is, there is no oil separation outlet 152 with a small inner diameter between the oil separation chamber 15 and the resonance chamber 13. The upper end of the oil separation tube is fixedly connected to the inner wall of the upper space of the oil separation chamber 15. The oil separation tube includes a second connecting pipe section 31, a second transition pipe section 32 and an oil separation pipe section 33. The outer diameter of the second connecting pipe section 31 is larger than the outer diameter of the oil separation pipe section 33. The outer diameter of the second transition pipe section 32 is constructed to gradually decrease from the two ends connected to the second connecting pipe section 31 to the one end connected to the oil separation pipe section 33. The upper end of the second connecting pipe section 31 is fixedly connected to the inner peripheral wall of the upper end of the oil separation chamber 15. The oil separation pipe section 33 is suspended in the oil separation chamber 15, and the lower end face of the oil separation pipe section 33 is spaced apart from the second end cap 22.

[0135] Example 3

[0136] like Figure 4 and Figure 6 As shown, the difference between this embodiment three and the above embodiment one includes: a silencing hole 41 is provided on the outer peripheral wall of the silencing tube 4, and the silencing hole 41 is distributed in multiple rings along the axial direction of the silencing tube 4, with multiple silencing holes 41 in each ring and spaced apart along the circumference of the silencing tube 4.

[0137] Example 4

[0138] like Figure 5 and Figure 7 As shown, the difference between this embodiment four and the above embodiment two includes: a silencing hole 41 is provided on the outer peripheral wall of the silencing tube 4, and the silencing hole 41 is distributed in multiple rings along the axial direction of the silencing tube 4, with multiple silencing holes 41 in each ring and spaced apart along the circumference of the silencing tube 4.

[0139] In the description of this 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," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0140] In the description of this invention, "first feature" and "second feature" may include one or more of the features.

[0141] In the description of this invention, "a plurality of" means two or more.

[0142] In the description of this invention, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or it may include the first and second features not being in direct contact but being in contact through another feature between them.

[0143] In the description of this invention, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicating that the first feature is at a higher horizontal level than the second feature.

[0144] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0145] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit 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, characterized in that, include: A high-pressure housing (1) is provided, on which a high-pressure chamber (11) and a refrigerant outlet (12) are formed. The compression component (20) of the electric compressor (100) is adapted to discharge compressed refrigerant into the high-pressure chamber (11), and the refrigerant outlet (12) is used to discharge refrigerant out of the high-pressure housing (1). The high-pressure housing (1) also has a resonant cavity (13) and an oil separator (15). The oil separator inlet (151) of the oil separator (15) is connected to the high-pressure cavity (11). The oil separator outlet (152) of the oil separator (15) is located on the inner wall of the resonant cavity (13). The resonant cavity (13) is provided with a silencer tube (4). The first end of the silencer tube (4) is connected to the refrigerant outlet (12) and the second end is located in the resonant cavity (13) and connected to the resonant cavity (13). The refrigerant entering the resonant cavity (13) enters the silencer tube (4) through the second end. The refrigerant in the silencer tube (4) is discharged to the outside of the high-pressure housing (1) through the refrigerant outlet (12). Multiple rings of silencing holes (41) are provided along the axial direction of the silencing tube (4), and each ring of silencing holes (41) includes multiple silencing holes (41) arranged circumferentially along the silencing tube (4); The center distance t between two adjacent silencing holes (41) satisfies: d≤t≤5d; where d is the equivalent diameter of the hole cross section of the silencing hole (41), and the hole cross sections of the multiple silencing holes (41) are different in size, and d is the equivalent diameter of the silencing hole (41) with the largest hole cross section; The cross-section of the silencing hole (41) satisfies: 0.05D≤d≤D; where d is the equivalent diameter of the cross-section of the silencing hole (41), D is the equivalent diameter of the cross-section of the silencing tube (4), the silencing tube (4) is a variable cross-section structure, and D is the equivalent diameter of the minimum cross-section of the silencing tube (4); The length direction of the silencing cannula (4) is parallel to the length direction of the resonant cavity (13), and the length of the silencing cannula (4) extending into the resonant cavity (13) is less than 2 / 3 of the length of the resonant cavity (13).

2. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The resonant cavity (13) is connected to the refrigerant outlet (12) through a connecting channel (14), and the cross-sectional area of ​​the connecting channel (14) is smaller than the cross-sectional area of ​​the resonant cavity (13).

3. The high-pressure housing assembly for an electric compressor according to claim 2, characterized in that, The first end of the silencing cannula (4) is fixedly connected to the inner wall of the connection channel (14).

4. The high-pressure housing assembly of the electric compressor according to claim 1, characterized in that, The high-pressure housing (1) has a first opening (131) formed on its surface for processing the resonant cavity (13), and the high-pressure housing (1) includes a first end cap (21) covering the first opening (131).

5. The high-pressure housing assembly for an electric compressor according to claim 4, characterized in that, The second end of the silencer cannula (4) is spaced apart from the first end cap (21).

6. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The silencer cannula (4) includes a first connecting pipe section (42) and a silencer pipe section (44). The outer diameter of the first connecting pipe section (42) is larger than the outer diameter of the silencer pipe section (44). The first connecting pipe section (42) is fixed to the high-pressure housing (1). The peripheral wall of the silencer pipe section (44) is provided with a silencer hole (41).

7. The high-pressure housing assembly for an electric compressor according to claim 6, characterized in that, The silencer cannula (4) further includes a first transition section (43) connected between the first connecting section (42) and the silencer section (44), wherein the outer diameter of the first transition section (43) is configured to gradually decrease from the end connected to the first connecting section (42) to the end connected to the silencer section (44).

8. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The oil separator (15) is provided with an oil separator (3) for oil-gas separation. The refrigerant entering the oil separator (15) flows to the resonant cavity (13) after being separated by the oil separator (3).

9. The high-pressure housing assembly for an electric compressor according to claim 8, characterized in that, The oil separator (3) is constructed as an oil separator tube. One end of the oil separator tube is fixed to the inner peripheral wall of the oil separator outlet (152), and the other end of the oil separator tube extends into the oil separator cavity (15) and communicates with the oil separator cavity (15).

10. The high-pressure housing assembly for an electric compressor according to claim 8, characterized in that, The oil separator (3) is constructed as an oil separator tube, which includes a second connecting pipe section (31) and an oil separator pipe section (33). The outer diameter of the second connecting pipe section (31) is larger than the outer diameter of the oil separator pipe section (33). The second connecting pipe section (31) is fixedly connected to the inner wall of the oil separator cavity (15). The oil separator pipe section (33) is suspended in the oil separator cavity (15) and communicates with the oil separator cavity (15).

11. The high-pressure housing assembly for an electric compressor according to claim 10, characterized in that, The oil separator pipe also includes a second transition pipe section (32) connected between the second connecting pipe section (31) and the oil separator pipe section (33), wherein the outer diameter of the second transition pipe section (32) is configured to gradually decrease from the end connected to the second connecting pipe section (31) to the end connected to the oil separator pipe section (33).

12. The high-pressure housing assembly for an electric compressor according to claim 1, characterized in that, The resonant cavity (13) is provided with a first oil return channel (132), which is located in the lower space of the resonant cavity (13) in the direction of gravity.

13. The high-pressure housing assembly for an electric compressor according to claim 12, characterized in that, The position of the first oil return channel (132) in the resonant cavity (13) satisfies: h≤0.3H; where 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 direction of gravity, and H is the vertical distance between the highest point and the lowest point of the resonant cavity (13) in the direction of gravity.

14. An electric compressor (100), characterized in that, include: A housing component, the housing component comprising a high-pressure housing assembly for an electric compressor according to any one of claims 1-13; A compression component (20) has an exhaust port (201) connected to the high-pressure chamber (11) to discharge compressed refrigerant into the high-pressure chamber (11); The motor component (30) includes a motor body (301) and a drive shaft (302). The motor body (301) drives the compression component (20) to perform compression work through the drive shaft (302).

15. The electric compressor (100) according to claim 14, characterized in that, The housing component also includes: A partition plate (103) is provided, the compression component (20) and the motor body (301) are respectively placed on both sides of the partition plate (103), and the drive shaft (302) passes through the partition plate (103) to connect with the compression component (20); A low-pressure housing (102) is formed between the low-pressure housing (102) and the middle partition (103) to form a low-pressure cavity (105) for accommodating the motor body (301). A refrigerant inlet (1021) communicating with the low-pressure cavity (105) is formed on the low-pressure housing (102). The compression component (20) draws in refrigerant from the low-pressure cavity (105).

16. An air conditioning system (300), characterized in that, Includes the electric compressor (100) according to any one of claims 14-15.

17. A vehicle (1000), characterized in that, Includes the air conditioning system (300) as described in claim 16.

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