Scroll compressors, refrigeration equipment and automobiles

Abstract

The present application provides a scroll compressor, a refrigeration device and an automobile, wherein the scroll compressor includes: a front cover, a rear cover, a cylinder, a fixed scroll, a movable scroll and a high-pressure valve; a low-pressure chamber is formed between the cylinder and the rear cover, an exhaust chamber is formed between the front cover and the fixed scroll, and an intake chamber, an intermediate chamber and a high-pressure chamber are formed between the fixed scroll and the movable scroll; the outer peripheral surface of the fixed scroll is connected to the front cover as a part of the shell, and a high-pressure valve mounting hole is provided on the side of the fixed scroll facing away from the movable scroll, and the high-pressure valve is installed in the high-pressure valve mounting hole; when the high-pressure valve is opened, the intake chamber is connected to the exhaust chamber, and when it is closed, the intake chamber is isolated from the exhaust chamber. In the scroll compressor, refrigeration device and automobile provided in the present application, by changing the structure of the fixed scroll and setting the high-pressure valve on the back plate of the fixed scroll, the gas in the exhaust chamber can be depressurized through the intake chamber, thereby reducing the leakage point of the scroll compressor, avoiding the reduction of refrigerant, and reducing the risk of environmental pollution.

Description

Technical Field

[0001] The present application relates to the technical field of compressors, and in particular to a scroll compressor, a refrigeration device and a car. Background Art

[0002] At present, scroll compressors have been widely used in the automotive field due to their high performance and high reliability. In particular, the development and use of new energy vehicles have created an unprecedented demand for scroll compressor products. However, due to vehicle weight and installation space limitations, automotive scroll compressors are often designed to be relatively compact, so the functional structure design space left for the compressor itself is relatively limited.

[0003] High pressure protection and temperature protection are commonly used protection methods for compressors or air conditioning systems. In order to reduce the complexity of the system, the compressor often has these protection functions. Existing automotive scroll compressors are basically equipped with pressure protection devices, but due to limited structural space, they basically adopt the method of external high-pressure valves, that is, a high-pressure valve is opened on the front cover where the high-pressure chamber of the compressor is located.

[0004] When the exhaust pressure is higher than the set value, the high-pressure valve opens and discharges the high-pressure gas in the high-pressure chamber directly into the air. This design not only pollutes the atmospheric environment, but also increases the quality risk of product leakage. At the same time, this leakage cannot be monitored. Repeated leakage of the high-pressure valve will eventually lead to a reduction in system refrigerant, thereby affecting system efficiency and eventually causing the compressor to burn out due to lack of refrigerant. Summary of the invention

[0005] In view of the defects in the prior art, the purpose of the present invention is to provide a scroll compressor, a refrigeration equipment and a vehicle, which overcome the difficulties of the prior art, can reduce product leakage points, improve product quality and reduce the risk of environmental pollution.

[0006] According to one aspect of the present invention, there is provided a scroll compressor, comprising: a front cover, a rear cover, a cylinder, a fixed scroll, a movable scroll and a high-pressure valve;

[0007] A low-pressure chamber is formed between the cylinder and the rear cover, an exhaust chamber is formed between the front cover and the fixed scroll, the fixed scroll and the movable scroll cooperate with each other to form an air suction chamber, an intermediate chamber and a high-pressure chamber, the intermediate chamber is located between the air suction chamber and the high-pressure chamber, the high-pressure chamber is communicated with the exhaust chamber during exhaust, and the air suction chamber is communicated with the low-pressure chamber during suction;

[0008] A high-pressure valve mounting hole is provided on a side of the fixed scroll facing away from the movable scroll, and the suction chamber and the exhaust chamber are both connected to the high-pressure valve mounting hole;

[0009] The high-pressure valve is installed in the high-pressure valve installation hole. When the high-pressure valve is opened, the air suction chamber is connected to the air discharge chamber. When the high-pressure valve is closed, the air suction chamber and the air discharge chamber are each in a closed state.

[0010] The outer peripheral surface of the fixed scroll plate is connected to the front cover as a part of the shell, and a scroll tooth is arranged on the fixed scroll plate, and the profile of the scroll tooth is an involute line arranged continuously from the inside to the outside;

[0011] The high-pressure valve mounting hole is opened on the extension line of the involute, and the extension line extends along the expansion direction of the involute. The expansion angle from the end of the involute to the high-pressure valve mounting hole is between 140° and 210°.

[0012] Optionally, in the scroll compressor, an expansion angle from the end of the involute to the high-pressure valve mounting hole is between 150° and 200°.

[0013] Optionally, in the scroll compressor, a boss is provided on the side of the fixed scroll facing away from the movable scroll, and the high-pressure valve mounting hole is provided along the axial direction of the boss and passes through both ends of the boss.

[0014] Optionally, in the scroll compressor, an unloading channel is provided on the fixed scroll plate, and the high-pressure valve mounting hole and the suction cavity are both connected to the unloading channel.

[0015] Optionally, in the scroll compressor, the unloading channel is opened on the extension line of the involute, and the expansion angle from the end of the involute to the unloading channel is between 140° and 210°.

[0016] Optionally, in the scroll compressor, an expansion angle from the end of the involute to the unloading channel is between 150° and 200°.

[0017] According to another aspect of the present invention, a refrigeration device is provided, the refrigeration device comprising the scroll compressor as described above.

[0018] According to yet another aspect of the present invention, a vehicle is provided, the vehicle comprising the refrigeration device as described above.

[0019] In the scroll compressor, refrigeration equipment and automobile provided by the present invention, by changing the structure of the static scroll disk and arranging the high-pressure valve of the scroll compressor on the back plate of the static scroll disk, the gas in the exhaust chamber can be depressurized through the suction chamber, thereby reducing the product leakage point, avoiding the reduction of system refrigerant and reducing the risk of environmental pollution. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to make the characteristics and advantages of the present invention more obvious.

[0021] Figure 1 It is a structural schematic diagram of a scroll compressor according to Embodiment 1 of the present invention;

[0022] Figure 2 This is a schematic structural diagram of a scroll compressor according to Embodiment 1 of the present invention when a high-pressure valve is not installed;

[0023] Figure 3 It is a top view of the end surface of the fixed scroll according to the first embodiment of the present invention;

[0024] Figure 4 It is a structural schematic diagram of a scroll compressor according to a second embodiment of the present invention;

[0025] Figure 5 This is a schematic structural diagram of a scroll compressor according to Embodiment 2 of the present invention when a high-pressure valve is not installed;

[0026] Figure 6 This is a top view of the end surface of the fixed scroll disk according to the second embodiment of the present invention. DETAILED DESCRIPTION

[0027] The following is a detailed description of the embodiments of the present invention. Although the present invention will be described and illustrated in conjunction with some specific embodiments, it should be noted that the present invention is not limited to these embodiments. On the contrary, modifications or equivalent substitutions made to the present invention should all be included in the scope of the claims of the present invention.

[0028] In addition, in order to better illustrate the present invention, numerous specific details are provided in the following specific embodiments. It will be understood by those skilled in the art that the present invention can be implemented without these specific details. In other examples, well-known structures and components are not described in detail in order to highlight the main purpose of the present invention.

[0029] The technical solution of the present invention is described in detail below in conjunction with the accompanying drawings and specific embodiments to make the characteristics and advantages of the present invention more obvious.

[0030] [Example 1]

[0031] Please refer to Figure 1 and Figure 2 , which is a schematic diagram of the structure of the scroll compressor of the first embodiment of the present invention. Figure 1 and Figure 2As shown, the scroll compressor 10 includes: a front cover 11, a rear cover (not shown in the figure), a cylinder (not shown in the figure), a fixed scroll plate 12, a movable scroll plate 13 and a high-pressure valve 14; a low-pressure chamber (not shown in the figure) is formed between the cylinder and the rear cover, an exhaust chamber 16 is formed between the front cover 11 and the fixed scroll plate 12, the fixed scroll plate 12 and the movable scroll plate 13 cooperate with each other to form an intake chamber 15, an intermediate chamber (not shown in the figure) and a high-pressure chamber (not shown in the figure), the intermediate chamber is located between the intake chamber 15 and the high-pressure chamber, the high-pressure chamber is connected with the exhaust chamber 16 during exhaust, and the intake chamber 15 is connected with the low-pressure chamber during intake; a high-pressure valve mounting hole 14a is provided on the side of the fixed scroll plate 12 facing away from the movable scroll plate 13, the intake chamber 15 and the exhaust chamber 16 are both connected to the high-pressure valve mounting hole 14a; the high-pressure valve 14 is installed in the high-pressure valve mounting hole 14a, when the high-pressure valve 14 is opened, the intake chamber 15 is connected to the exhaust chamber 16, when the high-pressure valve 14 is closed, the intake chamber 15 and the exhaust chamber 16 are each in a closed state; the outer peripheral surface of the static scroll plate 12 is connected to the front cover 11 as a part of the shell, and the static scroll plate 12 is provided with a vortex tooth, and the profile of the vortex tooth is an involute continuously arranged from the inside to the outside; the high-pressure valve mounting hole 14a is opened on the extension line of the involute, and the extension line extends along the expansion direction of the involute, and the expansion angle from the end of the involute to the high-pressure valve mounting hole 14a is between 140° and 210°.

[0032] Specifically, the front cover 11 and the rear cover are respectively connected to the two ends of the cylinder to form a closed installation cavity, and the fixed scroll 12 and the movable scroll 13 are both arranged in the installation cavity. The fixed scroll 12 is connected to the front cover 11, and the movable scroll 13 is connected to the fixed scroll 12, that is, the fixed scroll 12 is located between the movable scroll 13 and the front cover 11.

[0033] An exhaust chamber 16 is formed between the fixed scroll 12 and the front cover 11, and the exhaust chamber 16 is connected to an exhaust passage (not shown in the figure) provided on the scroll compressor 10. A low-pressure chamber is formed between the cylinder and the rear cover, and the low-pressure chamber is connected to an intake passage (not shown in the figure) provided on the scroll compressor 10. The fixed scroll 12 and the movable scroll 13 cooperate with each other to form a plurality of working chambers, and the plurality of working chambers include an intake chamber 15, an intermediate chamber and a high-pressure chamber. The intermediate chamber is located between the intake chamber 15 and the high-pressure chamber. The high-pressure chamber is connected to the exhaust chamber 16 during exhaust, and the intake chamber 15 is connected to the low-pressure chamber during intake.

[0034] The suction chamber 15 is formed on the side of the fixed scroll 12 facing away from the front cover 11 and is located at the edge of the fixed scroll 12. It is the outermost working chamber among the multiple working chambers. The high-pressure chamber is located at the center of the fixed scroll 12, and the intermediate chamber is located between the center and the edge of the fixed scroll 12.

[0035] Compared with the existing fixed scroll, the fixed scroll 12 provided in this embodiment has a relatively larger overall structure and a larger internal structural space. Therefore, the high-pressure valve mounting hole 14 a can be disposed in the fixed scroll 12 .

[0036] like Figure 1 As shown, the outer peripheral surface of the stationary scroll plate 12 is not arranged inside the front cover 11, but is basically flush with the outer surface of the front cover 11. The outer peripheral surface of the stationary scroll plate 12 is connected to the front cover 11, and together they serve as a partial shell of the scroll compressor 10.

[0037] In this embodiment, the housing of the scroll compressor 10 is composed of a front cover 11, an outer peripheral surface of a fixed scroll plate 12 and a cylinder.

[0038] like Figure 2 As shown, the side of the fixed scroll 12 facing away from the movable scroll 13 is a back plate, and a high-pressure valve mounting hole 14a is provided on the back plate. The high-pressure valve mounting hole 14a runs through the thickness of the back plate, and the suction chamber 15 and the exhaust chamber 16 are both connected to the high-pressure valve mounting hole 14a.

[0039] Please continue to Figure 1 and Figure 2 The high-pressure valve 14 is installed in the high-pressure valve installation hole 14a as a pressure relief valve. When the scroll compressor 10 is in a high-pressure state, the exhaust chamber 16 is the high-pressure side and the suction chamber is the low-pressure side. The high-pressure valve 14 opens under the action of the gas pressure difference between the exhaust chamber 16 and the suction chamber 15, and the oil-gas mixture on the high-pressure side will be discharged to the low-pressure side (i.e., the suction chamber 15).

[0040] It should be understood that the high pressure here is relative to the low pressure here, that is, the gas pressure on the high-pressure side is higher than the gas pressure on the low-pressure side, and the gas pressure on the low-pressure side is lower than the gas pressure on the high-pressure side.

[0041] In this embodiment, the high-pressure valve 14 is built into the back plate of the fixed scroll 12. When high pressure occurs, the high-pressure valve 14 opens, and the high-pressure gas (including refrigerant and oil) will leak from the exhaust chamber 16 to the suction chamber 15, thereby achieving the purpose of reducing the pressure of the exhaust chamber. Since the high-pressure gas in the exhaust chamber 16 is depressurized through the suction chamber 15 and is not directly discharged to the outside air, the product leakage points are reduced.

[0042] The high-pressure valve 14 is arranged near the suction chamber 15, and the exhaust temperature detection device provided by the compressor or the exhaust temperature detection device required by the system can be used to detect the exhaust temperature change and implement protection action, thereby realizing closed-loop control.

[0043] It can be seen that this design not only prevents the atmosphere from being contaminated by the refrigerant, but also provides technical preparation for low-pressure side temperature sensing and the realization of high exhaust pressure cut-off protection function.

[0044] Please refer to Figure 3 , which is a top view of the end surface of the fixed scroll disk of the first embodiment of the present invention. Figure 3 As shown, the fixed scroll plate 12 is provided with a vortex tooth 121 and an exhaust port 122, and the exhaust port 122 is located at the center of the fixed scroll plate 12. The profile of the vortex tooth 121 is an involute continuously arranged from the inside to the outside, and the starting end of the involute is located at the center of the fixed scroll plate 12, and the end of the involute is located at the edge of the fixed scroll plate 12.

[0045] Please continue to refer to Figure 3 The high-pressure valve mounting hole 14a is opened on the extension line of the involute, and the extension line starts from the end of the involute (i.e., the end of the volute tooth 121) and continues to extend along the expansion direction of the involute. The high-pressure valve mounting hole 14a has a certain expansion angle α1 from the end of the involute (i.e., the starting end of the extension line).

[0046] In this embodiment, the expansion angle α1 from the end of the involute to the high-pressure valve installation hole 14a is required to be between 140° and 210°. In this way, it can be ensured that the high-pressure valve installation hole 14a and the suction cavity 15 are not coaxially arranged, but are connected to each other.

[0047] Preferably, the expansion angle α1 from the end of the involute to the high-pressure valve mounting hole 14a is between 150° and 200°. For example, the expansion angle α1 from the end of the involute to the high-pressure valve mounting hole 14a is 150.40° or 197.14°.

[0048] Correspondingly, this embodiment further provides a refrigeration device, which includes the scroll compressor 10 as described above. Please refer to the above for details, which will not be described here.

[0049] Correspondingly, this embodiment also provides a car, wherein the car includes the refrigeration device as described above. Please refer to the above for details, which will not be described in detail here.

[0050] [Example 2]

[0051] Please refer to Figure 4 and Figure 5 , which is a schematic diagram of the structure of the scroll compressor of the second embodiment of the present invention. Figure 2 As shown, the scroll compressor 20 includes: a front cover 21, a fixed scroll plate 22, a movable scroll plate (not shown in the figure) and a high-pressure valve 24; the fixed scroll plate 22 and the movable scroll plate are both arranged inside the front cover 21, the fixed scroll plate 22 and the movable scroll plate cooperate with each other to form an air suction chamber 25, and an air discharge chamber 26 is formed between the front cover 21 and the fixed scroll plate 22; a high-pressure valve mounting hole 24a is provided on the side of the fixed scroll plate 22 facing away from the movable scroll plate, and the air suction chamber 25 and the air discharge chamber 26 are both connected to the high-pressure valve mounting hole 24a; the high-pressure valve 24 is mounted In the high-pressure valve mounting hole 24a, when the high-pressure valve 24 is opened, the suction chamber 25 is connected with the exhaust chamber 26, and when the high-pressure valve 24 is closed, the suction chamber 25 and the exhaust chamber 26 are each in a closed state; a vortex tooth is provided on the static scroll plate 22, and the profile of the vortex tooth is an involute continuously arranged from the inside to the outside; the high-pressure valve mounting hole 24a is opened on the extension line of the involute, and the extension line extends along the expansion direction of the involute, and the expansion angle from the end of the involute to the high-pressure valve mounting hole 24a is between 140° and 210°.

[0052] Specifically, a high-pressure valve mounting hole 24 a is provided on the back plate of the fixed scroll plate 22 , and the high-pressure valve mounting hole 24 a is used to install the high-pressure valve 24 . The high-pressure valve 24 is provided between the suction chamber 25 and the exhaust chamber 26 as a pressure relief valve.

[0053] Please continue to refer to Figure 5 A boss 24b is provided on the back plate of the static scroll plate 22, and the boss 24b is connected to the back plate of the static scroll plate 22 as a whole. The high-pressure valve mounting hole 24a is arranged along the axial direction of the boss 24b and passes through the upper and lower ends of the boss 24b. An unloading channel 27 is also provided on the static scroll plate 22, and the unloading channel 27 is located between the high-pressure valve mounting hole 24a and the suction chamber 25. The high-pressure valve mounting hole 24a and the suction chamber 25 are both connected to the unloading channel 27.

[0054] The difference between this embodiment and the first embodiment is that a boss 24b is added to the back plate of the fixed scroll plate 22 to increase the thickness, thereby ensuring that the high-pressure valve has a sufficient installation length. In addition, an unloading channel 27 is also provided on the fixed scroll plate 22, and the unloading channel 27 is connected to the high-pressure valve installation hole to discharge the high-pressure gas to the low-pressure side.

[0055] Please refer to Figure 6 , which is a top view of the end surface of the fixed scroll disk of the second embodiment of the present invention. Figure 6 As shown, the fixed scroll plate 22 is provided with a scroll tooth 221 and an exhaust port 222. The exhaust port 222 is located at the center of the fixed scroll plate 22. The profile of the scroll tooth 221 is an involute continuously arranged from the inside to the outside. The starting end of the involute is located at the center of the fixed scroll plate 22, and the end of the involute is located at the edge of the fixed scroll plate 22.

[0056] Please continue to refer to Figure 6 The high-pressure valve installation hole 24a and the unloading channel 27 are both opened on the extension line of the involute, and the extension line continues to extend from the end of the involute (i.e., the end of the volute 221) along the expansion direction of the involute. The high-pressure valve installation hole 24a has a certain expansion angle α1 from the end of the involute, and the unloading channel 27 also has a certain expansion angle α2 from the end of the involute. It should be pointed out that Figure 6 The unloading channel 27 in FIG. 1 only shows its location and is not actually visible.

[0057] Preferably, the expansion angle α1 from the end of the involute to the high-pressure valve mounting hole 24a and the expansion angle α2 from the end of the involute to the unloading channel 27 are both between 140° and 210°. Further, the expansion angle α1 from the end of the involute to the high-pressure valve mounting hole 24a and the expansion angle α2 from the end of the involute to the unloading channel 27 are both between 150° and 200°.

[0058] In this embodiment, the expansion angle α1 from the end of the involute to the high-pressure valve mounting hole 24a is 150.4°, and the expansion angle α2 from the end of the involute to the unloading channel 27 is 197.14°.

[0059] Correspondingly, this embodiment further provides a refrigeration device, which includes the scroll compressor 20 as described above. Please refer to the above for details, which will not be repeated here.

[0060] Correspondingly, this embodiment also provides a car, wherein the car includes the refrigeration device as described above. Please refer to the above for details, which will not be described in detail here.

[0061] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referred to each other. For the refrigeration equipment and automobile disclosed in the embodiments, since they correspond to the scroll compressor disclosed in the embodiments, the description is relatively simple, and the relevant parts can be referred to the description of the scroll compressor part.

[0062] In summary, the scroll compressor, refrigeration equipment and automobile of the present invention, by changing the structure of the stationary scroll disk and arranging the high-pressure valve of the scroll compressor on the back plate of the stationary scroll disk, allow the gas in the exhaust chamber to be depressurized through the suction chamber, thereby reducing the product leakage point, avoiding the reduction of system refrigerant and reducing the risk of environmental pollution.

[0063] The above content is a further detailed description of the present application in combination with specific preferred implementation methods, and it cannot be determined that the specific implementation of the present application is limited to these descriptions. For ordinary technicians in the technical field to which the present application belongs, several simple deductions or substitutions can be made without departing from the concept of the present application, which should be deemed to fall within the scope of protection of the present application.

Claims

1. A scroll compressor, characterized in that: include: Front cover, rear cover, cylinder, fixed scroll, orbiting scroll and high pressure valve; A low-pressure chamber is formed between the cylinder and the rear cover, an exhaust chamber is formed between the front cover and the fixed scroll, the fixed scroll and the movable scroll cooperate with each other to form an air suction chamber, an intermediate chamber and a high-pressure chamber, the intermediate chamber is located between the air suction chamber and the high-pressure chamber, the high-pressure chamber is communicated with the exhaust chamber during exhaust, and the air suction chamber is communicated with the low-pressure chamber during suction; A high-pressure valve mounting hole is provided on a side of the fixed scroll facing away from the movable scroll, and the suction chamber and the exhaust chamber are both connected to the high-pressure valve mounting hole; The high-pressure valve is installed in the high-pressure valve installation hole, and when the high-pressure valve is opened, the air suction chamber is connected with the air discharge chamber, and when the high-pressure valve is closed, the air suction chamber is isolated from the air discharge chamber; The outer peripheral surface of the fixed scroll plate is connected to the front cover as a part of the shell, and a scroll tooth is arranged on the fixed scroll plate, and the profile of the scroll tooth is an involute line arranged continuously from the inside to the outside; The high-pressure valve mounting hole is opened on the extension line of the involute, and the extension line extends along the expansion direction of the involute. The expansion angle from the end of the involute to the high-pressure valve mounting hole is between 140° and 210°, and the expansion angle from the end of the involute to the high-pressure valve mounting hole is between 150° and 200°. A boss is provided on the side of the fixed scroll disk facing away from the movable scroll disk, and the high-pressure valve mounting hole is arranged along the axial direction of the boss and passes through both ends of the boss.

2. The scroll compressor according to claim 1, characterized in that: An unloading passage is provided on the fixed scroll disk, and the high-pressure valve mounting hole and the air suction cavity are both connected to the unloading passage.

3. The scroll compressor according to claim 2, characterized in that: The unloading channel is opened on the extension line of the involute, and the expansion angle from the end of the involute to the unloading channel is between 140° and 210°.

4. The scroll compressor according to claim 3, characterized in that: The expansion angle from the end of the involute to the unloading channel is between 150° and 200°.

5. A refrigeration device, characterized in that: The refrigeration device comprises the scroll compressor according to any one of claims 1 to 4.

6. A car, characterized in that: The vehicle comprises the refrigeration device according to claim 5.

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