WO2022041563A1

WO2022041563A1 - Compressor and refrigeration device

Info

Publication number: WO2022041563A1
Application number: PCT/CN2020/134968
Authority: WO
Inventors: 李小雷; 江波; 刘俊波; 钱灿宇; 黄柏英; 新宅秀信; 饗场靖
Original assignee: 广东美的环境科技有限公司
Priority date: 2020-08-31
Filing date: 2020-12-09
Publication date: 2022-03-03

Abstract

A compressor and a refrigeration device. The compressor comprises: a scroll plate assembly , comprising a pressure chamber (106); a back pressure member (108), connected to the scroll plate assembly, and a discharge cavity is formed on one side of the back pressure member (108) away from the scroll plate assembly; a first passage (110), provided on the back pressure member (108), and the first passage (110) is in communication with the pressure chamber (106) and the discharge cavity; a bypass switch (112), provided within the first passage (110) and configured to communicate or close the first passage (110). By using the bypass switch (112) to control the first passage (110) to be opened or closed, the amount of compressed medium in the pressure chamber (106) may be flexibly adjusted, so that the amount of compressed medium matches the actual demand, thereby improving the adaptability of the compressor.

Description

Compressors and refrigeration equipment

This application claims the priority of the Chinese patent application with the application number "202010900232.8" and the invention title "Compressor and Refrigeration Equipment", which was submitted to the State Intellectual Property Office of China on August 31, 2020, the entire contents of which are incorporated by reference in in this application; and

This application claims the priority of the Chinese patent application with the application number "202021869482.1" and the invention title "Compressor and Refrigeration Equipment", which was submitted to the State Intellectual Property Office of China on August 31, 2020, the entire contents of which are incorporated by reference in in this application.

technical field

The present application relates to the technical field of compressors, and in particular, to a compressor and refrigeration equipment.

Background technique

Compressors can compress refrigerants and other media to achieve cooling or heating. During the use of the compressor, the amount of medium compression required by different ambient temperatures is different. In the related art, the compression amount of the medium cannot be adjusted according to the ambient temperature, thereby causing the compression amount of the medium output by the compressor to not match the actual demand.

SUMMARY OF THE INVENTION

The present application aims to solve at least one of the technical problems existing in the prior art.

To this end, a first aspect of the present application provides a compressor.

A second aspect of the present application provides a refrigeration device.

A first aspect of the present application provides a compressor, comprising: a scroll assembly, the scroll assembly includes a pressure chamber; a back pressure member connected to the scroll assembly, and a side of the back pressure member facing away from the scroll assembly A discharge cavity is formed; a first passage is arranged on the back pressure piece, the first passage is communicated with the pressure chamber and the discharge cavity; a bypass switch is arranged in the first passage and is configured to be suitable for turning on or off the first passage aisle.

The compressor proposed in the present application includes: a scroll assembly, a back pressure member, a first passage and a bypass switch. Wherein, the scroll assembly includes a pressure chamber, and the medium entering into the pressure chamber can be compressed. The back pressure member is connected with the scroll assembly, and a discharge chamber is formed on the side of the back pressure member away from the scroll assembly, and the compressed medium inside the pressure chamber can flow into the discharge chamber. In addition, the back pressure piece is provided with a first channel, and the first channel is arranged through the back pressure piece. The inlet of the first passage communicates with the pressure chamber, and the outlet of the first passage communicates with the discharge chamber. The bypass switch is arranged in the first channel, and can be used to control the conduction of the first channel, or to control the closure of the first channel.

During the operation of the compressor, when the bypass switch is in the closed state, the first passage is closed, and the pressure chamber and the discharge chamber are disconnected; at this time, all the medium in the pressure chamber is compressed and discharged. When the bypass switch is in the open state, the first channel is turned on, and the pressure chamber and the discharge chamber are connected; at this time, a part of the medium in the pressure chamber is not compressed in the pressure chamber, but directly enters the discharge chamber through the first channel. Another part of the medium in the pressure chamber is compressed in the pressure chamber and then discharged. Therefore, the compressor proposed in the present application can adjust the amount of the medium to be compressed through the cooperation of the bypass switch and the first channel, thereby adjusting the output capacity of the compressor.

That is, the compressor proposed in the present application controls the opening or closing of the first channel through the bypass switch, and can flexibly adjust the amount of medium compressed in the pressure chamber, so that the amount of the compressed medium matches the actual demand and improves the adaptability of the compressor. .

Specifically, when the compressor is used in an air conditioner, the medium inside the compressor is a refrigerant, and the demand for the refrigerant is different in different environments. For example, the demand for refrigerant is higher in summer than in spring and autumn. Therefore, for the compressor proposed in the present application, the bypass switch can be closed when the demand for refrigerant is high, so that all the refrigerant is compressed, and the bypass switch can be opened when the demand for refrigerant is low, so that part of the refrigerant does not pass through. Compressed and discharged directly, this design can ensure that the actual compression of the compressor matches the environment.

The compressor according to the above technical solutions of the present application may also have the following additional technical features:

In the above technical solution, the first channel includes: a bypass chamber, which is arranged on the back pressure member and communicated with the pressure chamber, and the bypass switch is located in the bypass chamber; the bypass channel is arranged on the back pressure member, The bypass passage communicates with the bypass chamber and the discharge chamber.

In this technical solution, the first channel includes a bypass chamber and a bypass channel. Wherein, both the bypass chamber and the bypass channel are arranged on the back pressure member, and the two are communicated with each other. Specifically, the bypass chamber is provided on the side of the back pressure member close to the pressure chamber and communicated with the pressure chamber, and the bypass channel is provided on the side of the back pressure member close to the discharge chamber and communicated with the discharge chamber. In addition, the radial or lateral dimension of the bypass chamber is larger than the radial or lateral dimension of the bypass passage, so that there is enough space inside the bypass chamber to place the bypass switch in the bypass chamber.

Specifically, the bypass switch is provided at the junction of the bypass chamber and the bypass channel. When the bypass switch is on, a part of the medium in the pressure chamber is squeezed in the pressure chamber and enters the bypass chamber through the bypass switch; then, the medium in the bypass chamber enters the discharge chamber through the bypass channel.

In any of the above technical solutions, the scroll assembly further includes a discharge chamber; the compressor further includes a second passage, which is arranged on the back pressure member and communicates with the discharge chamber and the discharge cavity.

In this technical solution, the scroll assembly further includes a discharge chamber, and during the operation of the compressor, the medium compressed in the pressure chamber can enter the discharge chamber. In addition, the compressor further includes a second passage, which is arranged on the back pressure piece and runs through the back pressure piece; the inlet of the second passage communicates with the discharge chamber, and the outlet of the second passage communicates with the discharge chamber.

In particular, both the first channel and the second channel are independent of each other, are provided at different positions of the back pressure member, and communicate with different chambers. Since the first channel and the second channel are arranged separately, during the operation of the compressor, the two fluids with different thermodynamic properties do not interfere with each other, which effectively reduces the airflow pulsation. In addition, the first channel and the second channel are divided by the inner cylinder of the back pressure plate. During the exhaust process, the loss of the flow rate of the gas is small, and it directly enters the discharge cavity, and the flow loss of the gas flow is small.

Specifically, when the bypass switch is turned on, the first channel is conducted, and the pressure chamber is communicated with the discharge chamber. At this time, a part of the medium in the pressure chamber is not compressed in the pressure chamber, but directly enters the discharge chamber through the first channel; another part of the medium in the pressure chamber enters the discharge chamber after being compressed in the pressure chamber, and is discharged into the discharge chamber through the second channel in the discharge chamber. In addition, the uncompressed medium in the first channel will not exchange heat and mass with the compressed medium in the second channel, so that the exhaust gas flow is stable, and a large amount of gas backflow will not be generated under overcompression conditions.

Specifically, when the bypass switch is turned on, the first passage is closed, and the pressure chamber and the discharge chamber are disconnected. At this time, all the medium in the pressure chamber will be compressed and then discharged into the discharge chamber through the second passage.

In any of the above technical solutions, the scroll assembly includes: a first scroll, the first scroll can perform rotary motion; a second scroll, located between the first scroll and the back pressure member, the first scroll The second scroll and the first scroll together form the pressure chamber and the discharge chamber; the third passage is arranged on the second scroll and communicates with the pressure chamber and the first passage; the fourth passage is arranged in the second scroll on the scroll and communicated with the discharge chamber and the second passage.

In this technical solution, the scroll assembly includes a first scroll and a second scroll that are used together. Wherein, the first scroll and the second scroll both have a disc body and a wrap, and the wrap is arranged between the two disc bodies, and further formed between the first scroll and the second scroll pressure chamber and discharge chamber. In addition, the first scroll may perform an orbiting motion, thereby causing the first scroll to orbit relative to the second scroll to compress the medium entering the pressure chamber.

In addition, a third passage and a fourth passage are provided on the second scroll. Wherein, the third channel is communicated with the pressure chamber and the first channel, ensuring that when the bypass switch is turned on, part of the medium in the pressure chamber can directly enter the discharge chamber. The fourth channel is communicated with the discharge chamber and the second channel to ensure that the medium in the discharge chamber enters the second channel. In addition, the third passage and the fourth passage are arranged at different positions on the second scroll and are independent of each other.

In any of the above technical solutions, the compressor further includes: a casing, the scroll assembly and the back pressure member are both arranged in the casing; a floating plate, located in the casing, and the floating plate is connected to the back pressure member; a partition plate, located in the casing Inside the casing, it is arranged on the floating plate, and the partition plate and the casing together form a discharge cavity.

In this technical solution, the compressor further includes a casing, a floating plate and a partition plate. Among them, the scroll assembly, the back pressure piece, the floating plate and the partition plate are all arranged inside the casing, the floating plate is connected with the back pressure piece, the partition plate is arranged on the floating plate, and the partition plate and the casing together form a discharge cavity .

Specifically, along the height direction of the casing, the baffle plate is arranged above the scroll assembly, the floating plate is arranged above the back pressure member, the baffle plate is arranged above the floating plate, and the floating plate and the upper part of the casing together form a discharge chamber.

In any of the above technical solutions, the end of the second scroll facing away from the first scroll is provided with a groove, and the back pressure piece is arranged in the groove; An installation position is formed between the side walls of the fins, and the floating plate is arranged in the installation position.

In this technical solution, a groove is concavely formed on the end face of the second scroll facing away from the first scroll, and the back pressure member is directly arranged inside the groove; A cylinder higher than the edge is formed in the middle of the back pressure piece, and an installation position is formed between the cylinder and the side wall of the groove, and the floating plate can be directly set in the installation position. In particular, based on the above optimization, the sealing requirement between the back pressure member and the second scroll is greatly reduced.

In any of the above technical solutions, the compressor further includes: a first sealing member, disposed between the floating plate and the second scroll; a second sealing member, disposed between the floating plate and the back pressure member; a sealing gasket , which is arranged between the back pressure piece and the second scroll.

In this technical solution, the compressor further includes a first sealing member, a second sealing member and a sealing gasket. The first sealing member is arranged between the floating plate and the second scroll, and can seal the gap between the floating plate and the second scroll; the second sealing member is arranged between the back pressure member and the second scroll, and The gap between the floating plate and the back pressure piece can be sealed; the sealing gasket is arranged between the back pressure piece and the second scroll, and can seal the gap between the back pressure piece and the second scroll.

In particular, due to the arrangement of the groove on the second scroll and the cylinder in the middle of the back pressure member, the requirements for the sealing gasket can be effectively reduced, thereby greatly reducing the design and assembly difficulty of the compressor, and reducing the the cost of.

In any of the above technical solutions, the compressor further includes: a regulating chamber formed between the back pressure member and the floating plate; a drainage channel, which is arranged on the second scroll, the inlet of the drainage channel is communicated with the pressure chamber, and the drainage channel is connected to the pressure chamber. The outlet of the channel is communicated with the regulating chamber.

In this technical solution, the compressor further includes a regulating chamber and a drainage channel. Wherein, the regulating chamber is formed between the back pressure piece and the floating plate, and the regulating chamber and the pressure chamber are located on opposite sides of the back pressure piece. The drainage channel is arranged on the second scroll, the inlet of the drainage channel is communicated with the pressure chamber, and the outlet of the drainage channel is communicated with the regulating chamber. Due to the arrangement of the multi-section drainage channel, the drainage pressure can be prevented from directly passing through the back pressure piece, thereby reducing the structural complexity and sealing of the back pressure piece, and at the same time, the sealing gasket between the back pressure piece and the second scroll can be avoided. To reduce the requirement, it is sufficient to divide only the intermediate pressure of the pressure chamber and the exhaust pressure of the first passage.

In addition, a regulating chamber is formed on the second scroll, the regulating chamber has an intermediate pressure between the discharge pressure and the suction pressure, and the regulating chamber may be formed on the upper end surface of the second scroll. That is, by forming the regulating chamber, the first scroll and the second scroll can be brought into contact with each other with an appropriate force, medium leakage can be prevented, and lubrication can be increased, while the contact force can be adjusted, the friction of the contact can be reduced, However, the tightness was not reduced.

In any of the above technical solutions, the scroll assembly further includes: a rotating shaft connected to the first scroll; and a suction chamber formed between the first scroll and the second scroll.

In this technical solution, the compressor also includes a rotating shaft and a suction chamber. The rotating shaft is arranged inside the casing and extends along the height direction of the casing. The first scroll is connected with the rotating shaft, and can perform rotary motion under the driving of the rotating shaft, and then cooperate with the second scroll to compress the medium. In addition, a suction chamber is also formed between the first scroll and the second scroll, and the pressure chamber communicates with the suction chamber and the discharge chamber at the same time. During the operation of the compressor, the suction chamber sucks the medium, the medium in the suction chamber enters the intermediate pressure chamber to be compressed, the compressed medium enters the discharge chamber, and finally discharges the compressor.

A second aspect of the present application provides a refrigeration device, comprising: a compressor according to any of the above technical solutions.

The refrigeration equipment proposed in the present application includes the compressor according to any of the above technical solutions. Therefore, it has all the beneficial effects of the above-mentioned compressor, and will not be discussed one by one here.

Specifically, the refrigeration equipment proposed in this application includes, but is not limited to, air conditioners, refrigerators, freezers, display cabinets, and the like.

In any of the above technical solutions, the back pressure member is a pressed plate, and the bypass switch can use a bypass valve.

In any of the above technical solutions, the first scroll is a movable scroll, and the second scroll is a fixed scroll.

In any of the above technical solutions, the first channel is a bypass path, and the second channel is a discharge path.

In any of the above technical solutions, the casing is the upper casing of the compressor, and the discharge cavity is the upper casing space.

In any of the above technical solutions, the compressor is a scroll compressor.

Additional aspects and advantages of the present application will become apparent in the description section below, or learned by practice of the present application.

Description of drawings

The above and/or additional aspects and advantages of the present application will become apparent and readily understood from the following description of embodiments in conjunction with the accompanying drawings, wherein:

1 is a cross-sectional view of a compressor according to an embodiment of the present application;

2 is a cross-sectional view of the second scroll, the back pressure member and the floating plate in the compressor shown in FIG. 1 after being connected;

FIG. 3 is a cross-sectional view of the back pressure member in another direction of the structure shown in FIG. 2 .

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 3 is:

102 first scroll, 104 second scroll, 106 pressure chamber, 108 back pressure, 110 first passage, 1102 bypass chamber, 1104 bypass passage, 112 bypass switch, 114 discharge chamber, 116 first Second channel, 118 third channel, 120 fourth channel, 122 floating plate, 124 shell, 126 first seal, 128 second seal, 130 drainage channel, 132 shaft, 134 cylinder.

detailed description

In order to more clearly understand the above objects, features and advantages of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that the embodiments of the present application and the features in the embodiments may be combined with each other in the case of no conflict.

Many specific details are set forth in the following description to facilitate a full understanding of the present application. However, the present application can also be implemented in other ways different from those described herein. Therefore, the protection scope of the present application is not limited by the specific implementation disclosed below. example limitations.

The compressor and refrigeration apparatus provided according to some embodiments of the present application will be described below with reference to FIGS. 1 to 3 .

Example 1:

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the first embodiment of the present application proposes a compressor, including: a scroll assembly, a back pressure member 108 , a first passage 110 and a bypass switch 112 ; a scroll The disc assembly includes a pressure chamber 106 .

Wherein, as shown in FIG. 2, the scroll assembly includes a pressure chamber 106, and the medium entering the pressure chamber 106 can be compressed. The back pressure member 108 is connected to the scroll assembly, and a discharge cavity is formed on the side of the back pressure member 108 away from the scroll assembly, and the compressed medium inside the pressure chamber 106 can flow into the discharge cavity.

In addition, as shown in FIG. 3 , the back pressure member 108 is provided with a first channel 110 , and the first channel 110 is disposed through the back pressure member 108 . The inlet of the first passage 110 is communicated with the pressure chamber 106, and the outlet of the first passage 110 is communicated with the discharge chamber. The bypass switch 112 is disposed in the first channel 110 and can be used to control the first channel 110 to be turned on, or used to control the first channel 110 to be turned off.

Specifically, during the operation of the compressor, when the bypass switch 112 is in the closed state, the first passage 110 is closed, and the pressure chamber 106 is disconnected from the discharge chamber; at this time, all the medium in the pressure chamber 106 is compressed and discharged . When the bypass switch 112 is in the open state, the first passage 110 is conducted, and the pressure chamber 106 is connected to the discharge chamber; at this time, a part of the medium in the pressure chamber 106 is not compressed in the pressure chamber 106, but directly passes through the first The channel 110 enters the discharge chamber, and another part of the medium in the pressure chamber 106 is compressed in the pressure chamber 106 and then discharged. Therefore, the compressor proposed in this embodiment can adjust the amount of the compressed medium through the cooperation of the bypass switch 112 and the first channel 110, thereby adjusting the output capacity of the compressor.

That is, in the compressor proposed in this embodiment, the bypass switch 112 is used to control the opening or closing of the first passage 110, so that the amount of the medium compressed in the pressure chamber 106 can be flexibly adjusted, so that the amount of the compressed medium matches the actual demand and improves the Compressor adaptability.

In a specific embodiment, when the compressor is used in an air conditioner, the medium inside the compressor is a refrigerant, and the demand for the refrigerant is different in different environments. For example, the demand for refrigerant is higher in summer than in spring and autumn. Therefore, for the compressor proposed in this embodiment, the bypass switch 112 can be closed when the demand for refrigerant is high, so that all the refrigerant is compressed, and the bypass switch 112 can be opened when the demand for refrigerant is low, so that part of the refrigerant can be compressed. The refrigerant is discharged directly without being compressed. This design ensures that the actual compression of the compressor matches the environment.

Embodiment 2:

As shown in FIG. 1 , FIG. 2 and FIG. 3 , a second embodiment of the present application proposes a compressor, including: a scroll assembly, a back pressure member 108 , a first passage 110 and a bypass switch 112 ; a scroll The disc assembly includes a pressure chamber 106 ; the first passage 110 includes a bypass chamber 1102 and a bypass passage 1104 .

In addition, as shown in FIG. 3 , both the bypass chamber 1102 and the bypass channel 1104 are provided on the back pressure member 108 and communicate with each other. Specifically, the bypass chamber 1102 is provided on the side of the back pressure member 108 close to the pressure chamber 106 and communicated with the pressure chamber 106, and the bypass channel 1104 is provided on the side of the back pressure member 108 close to the discharge chamber and communicated with the discharge chamber cavity is connected.

In addition, as shown in FIG. 3 , the radial or lateral dimension of the bypass chamber 1102 is larger than the radial or lateral dimension of the bypass passage 1104 , so that there is enough space inside the bypass chamber 1102 to connect the bypass switch 112 provided in the bypass chamber 1102 .

Specifically, as shown in FIG. 2 , the bypass switch 112 is provided at the junction of the bypass chamber 1102 and the bypass channel 1104 . When the bypass switch 112 is in the open state, a part of the medium in the pressure chamber 106 is squeezed in the pressure chamber 106, and enters the bypass chamber 1102 through the bypass switch 112; discharge chamber.

In addition, like the first embodiment, this embodiment also has all the beneficial effects of the first embodiment, which will not be discussed one by one here.

Embodiment three:

As shown in FIG. 1 , FIG. 2 and FIG. 3 , a third embodiment of the present application proposes a compressor, including: a scroll assembly, a back pressure member 108 , a first passage 110 , a bypass switch 112 and a second Passage 116 ; scroll assembly includes pressure chamber 106 and discharge chamber 114 .

Wherein, as shown in FIG. 2, the scroll assembly includes a pressure chamber 106, and the medium entering the pressure chamber 106 can be compressed. The back pressure member 108 is connected to the scroll assembly, and a discharge cavity is formed on the side of the back pressure member 108 away from the scroll assembly, and the compressed medium inside the pressure chamber 106 can flow into the discharge cavity. As shown in FIG. 2 and FIG. 3 , the back pressure member 108 is provided with a first channel 110 , a bypass switch 112 is provided in the first channel 110 , and the inlet of the first channel 110 is communicated with the pressure chamber 106 . The outlet of 110 communicates with the discharge chamber. Through the cooperation of the bypass switch 112 and the first channel 110, the amount of the compressed medium can be adjusted, thereby adjusting the output capacity of the compressor. This beneficial effect is the same as that of Embodiment 1 and Embodiment 2, and will not be discussed in detail here.

In addition, as shown in FIG. 2 , the scroll assembly further includes a discharge chamber 114 into which the compressed medium in the pressure chamber 106 may enter during the operation of the compressor. In addition, as shown in FIG. 3 , the compressor further includes a second passage 116 . The second passage 116 is arranged on the back pressure member 108 and is arranged through the back pressure member 108 ; the inlet of the second passage 116 is communicated with the discharge chamber 114 . , the outlet of the second channel 116 is communicated with the discharge chamber.

In particular, as shown in FIG. 3 , both the first channel 110 and the second channel 116 are independent of each other, are provided at different positions of the back pressure member 108 , and communicate with different chambers. Since the first channel 110 and the second channel 116 are provided separately, during the operation of the compressor, the two fluids with different thermodynamic properties do not interfere with each other, which effectively reduces the airflow pulsation. In addition, the first channel 110 and the second channel 116 are divided by the inner cylinder 134 of the back pressure plate. During the exhaust process, the loss of the flow rate of the gas is small, and directly into the discharge cavity, the flow loss of the gas flow is small.

In a specific embodiment, when the bypass switch 112 is turned on, the first passage 110 is conducted, and the pressure chamber 106 is communicated with the discharge chamber. At this time, a part of the medium in the pressure chamber 106 is not compressed in the pressure chamber 106, but directly enters the discharge chamber through the first passage 110; another part of the medium in the pressure chamber 106 enters the discharge chamber after being compressed in the pressure chamber 106 114 , and is discharged into the discharge chamber through the second passage 116 . In addition, the uncompressed medium in the first channel 110 will not exchange heat and mass with the compressed medium in the second channel 116, so that the exhaust gas flow is stable, and a large amount of gas backflow will not be generated under over-compression conditions. .

In a specific embodiment, when the bypass switch 112 is turned on, the first passage 110 is closed, and the pressure chamber 106 is disconnected from the discharge chamber. At this time, all the medium in the pressure chamber 106 should be compressed and then discharged into the discharge chamber through the second passage 116 .

In this embodiment, further, as shown in FIG. 1 , the scroll assembly includes a first scroll 102 and a second scroll 104 that are used together. Wherein, the first scroll 102 and the second scroll 104 both have a disc body and a wrap, and the wrap is arranged between the two disc bodies, and then the first scroll 102 and the second scroll A pressure chamber 106 and a discharge chamber 114 are formed between 104 . In addition, the first scroll 102 may perform an orbiting motion, thereby causing the first scroll 102 to orbit relative to the second scroll 104 to compress the medium entering the pressure chamber 106 .

In addition, as shown in FIG. 2 , the second scroll 104 is provided with a third passage 118 and a fourth passage 120 . Wherein, the third channel 118 communicates with the pressure chamber 106 and the first channel 110 to ensure that when the bypass switch 112 is turned on, part of the medium in the pressure chamber 106 can directly enter the discharge chamber. The fourth channel 120 communicates with the discharge chamber 114 and the second channel 116 , and is guaranteed to be in the second channel 116 of the medium in the discharge chamber 114 . Also, the third passage 118 and the fourth passage 120 are provided at different positions on the second scroll 104 and are independent of each other.

In this embodiment, further, as shown in FIG. 1 and FIG. 2 , the compressor further includes a casing 124 , a floating plate 122 and a partition plate. The scroll assembly, the back pressure member 108, the floating plate 122 and the partition plate are all arranged inside the casing 124, the floating plate 122 is connected with the back pressure member 108, the partition plate is arranged on the floating plate 122, and the partition plate is connected to the back pressure member 108. The housings 124 collectively form a discharge cavity.

Specifically, as shown in FIG. 2 , along the height direction of the casing 124 , the partition plate is arranged above the scroll assembly, the floating plate 122 is arranged above the back pressure member 108 , and the partition plate is arranged above the floating plate 122 , The floating plate 122 and the upper portion of the housing 124 together form a discharge cavity.

In this embodiment, further, as shown in FIG. 2 , the end face of the second scroll 104 facing away from the first scroll 102 is concavely formed with a groove, and the back pressure member 108 is directly disposed inside the groove The middle part of the back pressure piece 108 is provided with a protrusion, so that the middle part of the back pressure piece 108 forms a cylinder 134 higher than the edge, and a mounting position is formed between the cylinder body 134 and the side wall of the groove, directly connecting the floating plate 122 It can be set in the installation position. In particular, based on the above optimization, the sealing requirement between the back pressure member 108 and the second scroll 104 is greatly reduced.

In this embodiment, further, as shown in FIG. 2 , the compressor further includes a first sealing member 126 , a second sealing member 128 and a sealing gasket. The first sealing member 126 is arranged on the floating plate 122 and the second scroll 104, and can seal the gap between the floating plate 122 and the second scroll 104; the second sealing member 128 is arranged on the back pressure member 108 and the second scroll 104. between the scrolls 104, and can seal the gap between the floating plate 122 and the back pressure member 108; the sealing gasket is arranged between the back pressure member 108 and the second scroll 104, and can seal the back pressure member 108 and the back pressure member 108. gaps between the second scrolls 104 .

In particular, due to the arrangement of the groove on the second scroll 104 and the cylindrical body 134 in the middle of the back pressure member 108, the requirements for the sealing gasket can be effectively reduced, thereby greatly reducing the design and assembly difficulty of the compressor, and reducing the the cost of the compressor.

In this embodiment, further, as shown in FIG. 2 , the compressor further includes a regulating chamber and a drainage channel 130 . The regulating chamber is formed between the back pressure member 108 and the floating plate 122 , and the regulating chamber and the pressure chamber 106 are located on opposite sides of the back pressure member 108 . The drainage channel 130 is provided on the second scroll 104, and the inlet of the drainage channel 130 is communicated with the pressure chamber 106, and the outlet of the drainage channel 130 is communicated with the adjustment chamber.

It is worth noting that, due to the arrangement of the multi-section drainage channel 130 , the drainage pressure can be prevented from directly passing through the back pressure member 108 , thereby reducing the structural complexity and sealing of the back pressure member 108 . The requirement of the gasket between the scrolls 104 is reduced, and only the intermediate pressure of the pressure chamber 106 and the exhaust pressure of the first passage 110 can be divided.

Also, a regulating chamber is formed on the second scroll 104 , the regulating chamber has an intermediate pressure between the discharge pressure and the suction pressure, and the regulating chamber may be formed on the upper end surface of the second scroll 104 . That is, by forming the regulating chamber, the first scroll 102 and the second scroll 104 can be brought into contact with each other with an appropriate force, medium leakage can be prevented, and lubrication can be increased, while the contact force can be adjusted, and the contact friction can be adjusted reduced, but the tightness was not reduced.

In this embodiment, further, as shown in FIG. 1 , the compressor further includes a suction chamber and a rotating shaft 132 . The rotating shaft 132 is disposed inside the casing and extends along the height direction of the casing. The first scroll 102 is connected to the rotating shaft 132 , and can perform a rotary motion driven by the rotating shaft 132 , and then cooperate with the second scroll 104 to compress the medium. In addition, a suction chamber is also formed between the first scroll 102 and the second scroll 104, and the pressure chamber 106 communicates with the suction chamber and the discharge chamber 114 at the same time. During the operation of the compressor, the suction chamber sucks the medium, the medium in the suction chamber enters the intermediate pressure chamber 106 to be compressed, and the compressed medium enters the discharge chamber 114, and is finally discharged from the compressor.

In any of the above embodiments, as shown in FIG. 2 , the back pressure member 108 is a pressed plate, and the bypass switch 112 can use a bypass valve.

In any of the above embodiments, as shown in FIGS. 1 and 2 , the first scroll 102 is an orbiting scroll and the second scroll 104 is a stationary scroll.

In any of the above embodiments, as shown in FIGS. 2 and 3 , the first passage 110 is the bypass path, and the second passage 116 is the discharge path.

In any of the above embodiments, the regulating chamber is the back pressure regulating chamber.

In any of the above embodiments, the casing 124 is the upper casing of the compressor, and the discharge cavity is the upper casing space.

Embodiment 4:

A fourth embodiment of the present application proposes a refrigeration device, comprising: a compressor as in any of the above-mentioned embodiments (this embodiment is not shown in the figure).

The refrigeration equipment proposed in this embodiment includes the compressor according to any of the above-mentioned embodiments. Therefore, it has all the beneficial effects of the above-mentioned compressor, and will not be discussed one by one here.

Specifically, the refrigeration equipment proposed in this embodiment includes, but is not limited to, an air conditioner, a refrigerator, a freezer, a display cabinet, and the like.

Specific examples:

As shown in FIG. 1 , FIG. 2 and FIG. 3 , the present embodiment provides a scroll compressor and a scroll assembly and an exhaust path for the scroll compressor. The scroll compressor includes a casing, a casing 124, a main frame, a first scroll 102 supported by the main frame, and a first scroll 102 that together with the first scroll 102 forms a suction chamber, a pressure chamber 106 and a discharge chamber 114 Two scrolls 104 . The scroll compressor also includes a back pressure member 108 and a floating plate 122 that cooperate with the second scroll 104 . The back pressure member 108 and the floating plate 122 form an adjustment chamber, and at the same time, the back pressure member 108 and the upper end surface of the second scroll 104 form a first channel 110 and a second channel 116, and the two channels are respectively arranged; the first channel 110 When the bypass switch 112 is opened, the medium in the pressure chamber 106 is discharged to the discharge chamber, and the second passage 116 discharges the medium in the discharge chamber 114 to the discharge chamber.

As shown in FIG. 2 and FIG. 3 , according to the technical solution provided by the specific embodiment, the first channel 110 and the second channel 116 are respectively provided, during the discharge process, the two different thermodynamic physical properties do not interfere with each other, effectively reducing the fluid loss. Specifically, the back pressure member 108 is a pressed plate, the bypass switch 112 is a bypass valve, the first scroll 102 is a movable scroll, the second scroll 104 is a fixed scroll, and the first passage 110 is a bypass. The second passage 116 is the discharge path; the discharge cavity is the space of the upper casing 124 .

Specifically, as shown in FIG. 1 , the scroll compressor includes: a movable scroll, which has a base plate and a scroll tooth connected to the base plate; as shown in FIG. 2 , a fixed scroll, which forms a suction together with the movable scroll chamber, intermediate pressure chamber 106 and discharge chamber 114. As shown in FIG. 2, the back pressure plate and the floating plate 122 are matched with the fixed scroll. The back pressure plate and the floating plate 122 form an adjustment chamber, and the back pressure plate and the upper end surface of the fixed scroll form a discharge path and a bypass path, and the two Each path is set separately. As shown in Figures 2 and 3, the back pressure plate forms a bypass space through two walls, and the back pressure plate is used to accommodate the bypass valve arranged on the fixed scroll; the back pressure plate is provided with a bypass hole and a discharge hole, and the bypass hole is The bypass path is in communication, and the discharge hole is in communication with the discharge path; as shown in Figure 2, the height of the peripheral end face of the back pressure plate is lower than that of the central cylinder.

A regulating chamber is formed on the fixed scroll, the back pressure chamber has an intermediate pressure between the discharge pressure and the suction pressure, and the back pressure chamber may be formed on the upper end surface of the fixed scroll. That is, by forming the regulating chamber, the movable scroll and the fixed scroll can contact each other with an appropriate force, refrigerant leakage can be prevented and lubrication can be increased, while the contact force can be adjusted, the friction of the contact can be reduced, but the sealing Sex is not reduced.

As shown in FIG. 2 and FIG. 3 , the multi-section drainage channel 130 is arranged on the stationary scroll, which can prevent the drainage pressure from directly passing through the back pressure plate, reduce the complexity and sealing of the back pressure plate structure, and at the same time prevent the back pressure plate and the static pressure plate from passing through the back pressure plate. The requirements for the gasket between the scroll end faces are reduced, and only the intermediate pressure of the back pressure chamber and the exhaust pressure of the bypass space can be divided.

The bypass path and the exhaust path are divided by the inner cylinder 134 of the back pressure plate. During the exhaust process, the flow rate loss of the gas at the exhaust port is small, and it directly enters the exhaust cavity, so the flow loss of the airflow is small; the bypass path and the discharge path are set separately. During the operation of the compressor, the two different Thermodynamic physical fluids do not interfere with each other, effectively reducing airflow pulsation. During the opening process of the bypass valve, the exhaust gas filled in the bypass path directly enters the space of the upper casing 124, and does not exchange heat and mass with the gas in the exhaust passage, and the airflow at the exhaust port of the stationary scroll is stable. Under overcompression conditions, there will not be a large amount of gas backflow.

Specifically, as shown in FIGS. 1 and 2 , the compressor proposed in this embodiment is a scroll compressor, and the scroll compressor has an orbiting scroll with scroll teeth and a fixed scroll with scroll teeth. The movable scroll performs an orbiting motion relative to the fixed scroll, and when the movable scroll and the stationary scroll engage with each other, as the movable scroll performs the orbiting motion, the relationship between the movable scroll and the stationary scroll The volume of the pressure chamber 106 formed therebetween is reduced. Therefore, the pressure of the medium in the pressure chamber 106 can be increased, and the medium is discharged from the discharge port formed in the central portion of the fixed scroll.

In the description of this application, the term "plurality" refers to two or more than two, unless otherwise expressly defined, the orientation or positional relationship indicated by the terms "upper", "lower" etc. is based on what is shown in the accompanying drawings The orientation or positional relationship is only for the convenience of describing the application and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the application; The terms "connected", "installed", "fixed", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or through the middle media are indirectly connected. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiment", etc. means that a particular feature, structure, material or characteristic described in connection with the embodiment or example is included in this application at least one embodiment or example of . In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or instance. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The above are only preferred embodiments of the present application, and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of this application shall be included within the protection scope of this application.

Claims

A compressor comprising:

a scroll assembly including a pressure chamber;

a back pressure piece connected with the scroll assembly, and a discharge cavity is formed on the side of the back pressure piece away from the scroll assembly;

a first channel, arranged on the back pressure member, the first channel is communicated with the pressure chamber and the discharge chamber;

A bypass switch is disposed in the first channel and configured to be suitable for turning on or off the first channel.
The compressor of claim 1, wherein the first passage comprises:

a bypass chamber, which is arranged on the back pressure member and communicated with the pressure chamber, and the bypass switch is located in the bypass chamber;

A bypass channel is arranged on the back pressure piece, and the bypass channel is communicated with the bypass chamber and the discharge chamber.
The compressor of claim 1, wherein,

The scroll assembly also includes a discharge chamber;

The compressor further includes a second passage, which is disposed on the back pressure member and communicates with the discharge chamber and the discharge cavity.
The compressor of claim 3, wherein the scroll assembly comprises:

a first scroll, the first scroll can perform rotary motion;

a second scroll, located between the first scroll and the back pressure member, the second scroll and the first scroll together form the pressure chamber and the discharge chamber;

a third passage, arranged on the second scroll, and communicated with the pressure chamber and the first passage;

The fourth passage is arranged on the second scroll and communicates with the discharge chamber and the second passage.
The compressor of claim 4, further comprising:

a casing, the scroll assembly and the back pressure member are both disposed in the casing;

a floating plate, located in the casing, the floating plate is connected with the back pressure piece;

A baffle, located in the casing, is arranged on the floating plate, and the baffle and the casing together form the discharge cavity.
The compressor of claim 5, wherein,

One end of the second scroll away from the first scroll is provided with a groove, and the back pressure member is arranged in the groove;

A protrusion is arranged in the middle of the back pressure piece, an installation position is formed between the protrusion and the side wall of the groove, and the floating plate is arranged in the installation position.
The compressor of claim 5, further comprising:

a first seal arranged between the floating plate and the second scroll;

a second sealing member, disposed between the floating plate and the back pressure member;

A sealing gasket is arranged between the back pressure member and the second scroll.
The compressor of any one of claims 5 to 7, further comprising:

an adjustment chamber, formed between the back pressure piece and the floating plate;

The drainage channel is arranged on the second scroll, the inlet of the drainage channel is communicated with the pressure chamber, and the outlet of the drainage channel is communicated with the adjustment chamber.
The compressor of any one of claims 5 to 7, wherein the scroll assembly further comprises:

a rotating shaft, connected with the first scroll;

A suction chamber is formed between the first scroll and the second scroll.
A refrigeration device, comprising:

A compressor as claimed in any one of claims 1 to 9.