Scroll compressors, air conditioners and vehicles

Abstract

The present invention provides a scroll compressor, an air conditioner and a vehicle, which relate to the technical field of compressors and solve the technical problem in the prior art that the pressure in the back pressure chamber of the existing scroll compressor is prone to be too high when working. The scroll compressor includes a pressure relief channel and a pressure relief device, wherein the pressure relief channel is connected to the back pressure chamber of the scroll compressor and the pressure relief channel is arranged on the crankshaft of the scroll compressor; when the pressure in the back pressure chamber is greater than a preset value, the pressure relief device opens the pressure relief channel so that the oil in the back pressure chamber can be discharged to the bearing on the crankshaft away from the back pressure chamber through the pressure relief channel. The present invention is used to reduce the oil pressure in the back pressure chamber.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and in particular to a scroll compressor, an air conditioner internally provided with the compressor, and a vehicle. Background Art

[0002] Scroll compressors have become the preferred compressor type in passenger cars due to their small size, light weight, and high efficiency. The existing scroll compressors include a housing 02, a bracket 03, a moving plate assembly 04, a stationary plate assembly 05, a front cover 06, an oil distribution pipe 08, a stator assembly 18, a rotor assembly 19, and a crankshaft 20. During the operation of the compressor, the oil-gas mixture is sucked into the compressor through the suction port 01, passes through the suction chamber 17, the compression chamber 28, and the high-pressure chamber 27, and then discharged from the exhaust port 07, completing the entire compression process. Its oil return system is as follows: oil and gas enter the compressor through the suction port 01, and the oil is deposited in the suction chamber 17. When the compressor is in operation, the oil and gas in the compressor enter the compression chamber 28 through the suction chamber 17, and then pass through the high-pressure chamber 27, and then enter the exhaust chamber 09. The oil and gas are separated through the oil distribution pipe 08, and a small part of the oil is discharged from the exhaust port 07 along with the gas, and most of the oil is deposited in the second oil pool 22, and then pass through the oil return channel 12, enter the bracket oil return channel 13, and enter the back pressure chamber 14.

[0003] The applicant has found that the prior art has at least the following technical problems:

[0004] Since the back pressure chamber 14 is a closed space, the refrigerant oil 10 accumulates in the back pressure chamber 14, causing the pressure in the back pressure chamber 14 to continue to increase. The pressure in the back pressure chamber 14 is too high, causing the compressor to vibrate and make noise, the power of the compressor to be high, and the capacity of the compressor to be reduced. Summary of the invention

[0005] The purpose of the present invention is to provide a scroll compressor, an air conditioner and a vehicle, which solves the technical problem that the pressure of the back pressure chamber of the existing scroll compressor is prone to be too high when working. The preferred technical solution among the many technical solutions provided by the present invention can produce many technical effects as described below.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A scroll compressor provided by the present invention comprises a pressure relief channel and a pressure relief device, wherein the pressure relief channel is connected to a back pressure chamber of the scroll compressor and the pressure relief channel is arranged on the crankshaft of the scroll compressor; when the pressure of the back pressure chamber is greater than a preset value, the pressure relief device opens the pressure relief channel so that the oil in the back pressure chamber can be discharged through the pressure relief channel to a bearing on the crankshaft away from the back pressure chamber.

[0008] Furthermore, the oil outlet of the pressure relief channel is arranged on the end surface of the crankshaft away from the back pressure chamber; the bearing of the crankshaft on the side away from the back pressure chamber is supported on the shell of the scroll compressor and the bearing, the crankshaft and the inner side wall of the shell form an oil pool connected to the suction chamber.

[0009] Furthermore, the pressure relief channel includes a first channel and a second channel, the first channel is connected to the back pressure chamber, and when the pressure in the back pressure chamber is greater than a preset value, the pressure relief device opens the connecting port between the first channel and the second channel under the action of oil pressure to allow oil to flow from the first channel to the second channel.

[0010] Further, the first channel is a through hole arranged on the crankshaft, and the second channel is arranged on a side wall of the first channel.

[0011] Furthermore, the pressure relief device includes a valve core, an elastic member and a fixed portion, the valve core is connected to the fixed portion through the elastic member, the fixed portion is fixed on the crankshaft, the valve core is located in the pressure relief channel, and the valve core can move toward the fixed portion under the action of oil pressure and compress the elastic member until the first channel is connected to the second channel.

[0012] Further, the fixing portion is inserted into the pressure relief channel and is located at an end of the crankshaft away from the back pressure chamber, and the elastic member is sandwiched between the valve core and the fixing portion.

[0013] Furthermore, the valve core is a spherical valve core, the cross-sectional shape of the first channel is circular, and the valve core can move along the axial direction of the first channel.

[0014] Furthermore, the elastic member is a spring.

[0015] An air conditioner comprises the scroll compressor.

[0016] A vehicle comprises the scroll compressor.

[0017] The present invention provides a scroll compressor, including a pressure relief channel and a pressure relief device. When the pressure of the back pressure chamber is greater than a preset value, the pressure relief device opens the pressure relief channel, and the refrigeration oil is discharged through the pressure relief channel, thereby reducing the pressure in the back pressure chamber. This solves the technical problem that the pressure in the back pressure chamber of the existing scroll compressor in the prior art is prone to being too high when working, thereby improving the performance of the compressor and reducing the noise and vibration of the compressor. In addition, the scroll compressor provided by the present invention not only adds a pressure relief channel, but also opens the pressure relief channel on the crankshaft. The oil in the back pressure chamber can be discharged to the bearing on the crankshaft away from the back pressure chamber through the pressure relief channel, so that the bearing is well lubricated. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 is a schematic cross-sectional front view of a scroll compressor provided by an embodiment of the present invention;

[0020] Figure 2 yes Figure 1 A partial enlarged view of

[0021] Figure 3 yes Figure 1 A partial enlarged view of B;

[0022] Figure 4 It is a left side schematic diagram of the pressure relief device provided in an embodiment of the present invention.

[0023] In the figure, 01-intake port; 02-housing; 03-bracket; 04-moving disc assembly; 05-static disc assembly; 06-front cover; 07-exhaust port; 08-oil distribution pipe; 09-exhaust chamber; 10-refrigerating oil; 11-filter; 12-return oil channel; 13-bracket return oil channel; 14-back pressure chamber; 15-pressure relief device; 151-valve core; 152-elastic member; 153-fixing part; 16-pressure relief channel; 161-first channel; 162-second channel; 17-intake chamber; 18-stator assembly; 19-rotating assembly; 20-crankshaft; 21-oil pool; 22-second oil pool; 23-third oil pool; 24-bearing; 25-second bearing; 26-third bearing; 27-high pressure chamber; 28-compression chamber. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0025] See also Figure 1-Figure 4The present invention provides a scroll compressor, including a pressure relief channel 16 and a pressure relief device 15, wherein the pressure relief channel 16 is connected to the back pressure chamber 14 of the scroll compressor and the pressure relief channel 16 is arranged on the crankshaft 20 of the scroll compressor; when the pressure of the back pressure chamber 14 is greater than a preset value, the pressure relief device 15 opens the pressure relief channel 16 so that the oil in the back pressure chamber 14 can be discharged to the bearing 24 on the crankshaft 20 away from the back pressure chamber 14 through the pressure relief channel 16. When the refrigeration oil is continuously accumulated in the back pressure chamber 14 and its oil pressure reaches the preset value, the pressure relief device 15 opens the pressure relief channel 16, and the refrigeration oil is discharged through the pressure relief channel 16, thereby reducing the pressure in the back pressure chamber 14, avoiding the pressure imbalance in the compressor, improving the compressor performance, and reducing the noise and vibration of the compressor. In addition, in the existing scroll compressor, the bearing 24 on the crankshaft 20 away from the back pressure chamber 14 is difficult to be lubricated with refrigeration oil. The scroll compressor provided by the present invention not only adds a pressure relief channel 16, but also opens the pressure relief channel 16 on the crankshaft 20. The oil in the back pressure chamber 14 can be discharged to the bearing 24 on the crankshaft 20 away from the back pressure chamber 14 through the pressure relief channel 16, so that the bearing 24 is well lubricated.

[0026] As an optional implementation of the embodiment of the present invention, the oil outlet of the pressure relief channel 16 is arranged on the end face of the crankshaft 20 away from the back pressure chamber 14; the bearing 24 on the side of the crankshaft 20 away from the back pressure chamber 14 is supported on the housing 02 of the scroll compressor, and the bearing 24, the crankshaft 20 and the inner side wall of the housing 02 form an oil pool 21 connected to the suction chamber 17. When the scroll compressor provided by the present invention is working, its oil return system is as follows: See Figure 1 , oil and gas enter the compressor through the air inlet 01, and the oil is deposited in the air inlet chamber 17. During the operation of the compressor, the oil and gas in the compressor enter the compression chamber 28 through the air inlet chamber 17, then pass through the high-pressure chamber 27, and then enter the exhaust chamber 09. The oil and gas are separated through the oil distribution pipe 08, and a small part of the oil is discharged from the exhaust port 07 with the gas, and most of the oil is deposited in the second oil pool 22, and then enters the bracket oil return channel 13 through the oil return channel 12, and enters the back pressure chamber 14. During the operation of the compressor, the second bearing 25 and the third bearing 26 are well lubricated; when the pressure of the back pressure chamber 14 reaches a certain level, the pressure relief device 15 opens the pressure relief channel 16, and the lubricating oil enters the oil pool 21 through the pressure relief channel 16, and then enters the air inlet chamber 17, completing the entire oil cycle, and at this time the bearing 24 can be well lubricated. The scroll compressor provided by the present invention improves the utilization rate of the refrigeration oil, lubricates the components inside the compressor well, prolongs the life of the compressor, enhances the reliability of the compressor, improves the compressor capacity, and reduces the noise and vibration of the compressor.

[0027] As an optional implementation method of the present invention, see Figure 3The pressure relief channel 16 includes a first channel 161 and a second channel 162. The first channel 161 is connected to the back pressure chamber 14. When the pressure of the back pressure chamber 14 is greater than a preset value, the pressure relief device 15 opens the communication port between the first channel 161 and the second channel 162 under the action of oil pressure to allow the oil to flow from the first channel 161 to the second channel 162. The first channel 161 can be a through hole provided on the crankshaft 20, and the second channel 162 can be provided on the side wall of the first channel 161. This is simple in form and easy to manufacture.

[0028] As an optional implementation of the embodiment of the present invention, the specific structure of the pressure relief device 15 can be as follows: the pressure relief device 15 includes a valve core 151, an elastic member 152 and a fixing portion 153, the valve core 151 is connected to the fixing portion 153 through the elastic member 152, the fixing portion 153 is fixed on the crankshaft 20, the valve core 151 is located in the pressure relief channel 16, and the valve core 151 can move toward the fixing portion 153 under the action of oil pressure and compress the elastic member 152 until the first channel 161 is connected to the second channel 162. Figure 3 When the valve core 151 is located on the left side of the connecting port between the first channel 161 and the second channel 162, the pressure relief channel 16 is in a closed state, that is, the oil cannot flow out through the pressure relief channel 16; when the refrigerant oil continues to accumulate in the back pressure chamber 14 and its oil pressure reaches a preset value, the valve core 151 moves to the right under the action of the oil pressure and the elastic member 152 until the connecting port between the first channel 161 and the second channel 162 is opened. At this time, the oil in the back pressure chamber 14 flows to the second channel 162 through the first channel 161 and flows into the oil pool 21, and finally enters the suction chamber 17.

[0029] As an optional implementation method of the present invention, see Figure 3 The fixing part 153 is inserted into the pressure relief channel 16 and is located at the end of the crankshaft 20 away from the back pressure chamber 14, and the elastic member 152 is sandwiched between the valve core 151 and the fixing part 153. Since the fixing part 153 is inserted into the first channel 161, the shape and structure of the fixing part 153 can be designed according to the form of the first channel 161, so that the fixing part 153 and the first channel 161 are matched and connected tightly. The elastic member 152 can be a spring, one end of the elastic member 152 is connected to the valve core 151, and the other end is connected to the fixing part 153. The valve core 151 reciprocates in the first channel 161 under the action of the elastic member 152 and the oil pressure.

[0030] As an optional implementation scheme of an embodiment of the present invention, the valve core 151 can be a spherical valve core 151, the cross-sectional shape of the first channel 161 is circular and the valve core 151 can move along the axial direction of the first channel 161; the design of the valve core 151 and the first channel 161 should enable the valve core 151 to slide flexibly in the first channel 161.

[0031] Embodiment 1:

[0032] The present invention provides a scroll compressor, including a pressure relief channel 16 and a pressure relief device 15, the pressure relief channel 16 is connected to the back pressure chamber 14 of the scroll compressor and the pressure relief channel 16 is arranged on the crankshaft 20 of the scroll compressor, the oil outlet of the pressure relief channel 16 is arranged on the end surface of the crankshaft 20 away from the back pressure chamber 14, the pressure relief channel 16 includes a first channel 161 and a second channel 162, the first channel 161 is a through hole arranged on the crankshaft 20, the second channel 162 is arranged on the side wall of the first channel 161, the pressure relief device 15 includes a valve core 151, an elastic member 152 and a fixing portion 153, the elastic member 152 can The elastic member 152 is a spring, one end of which is connected to the valve core 151 and the other end is connected to the fixing portion 153. The fixing portion 153 is fixed on the crankshaft 20. The valve core 151, the elastic member 152 and the fixing portion 153 are located in the pressure relief channel 16. When the pressure in the back pressure chamber 14 is greater than a preset value, the valve core 151 moves toward the fixing portion 153 under the action of the oil pressure and compresses the elastic member 152 until the valve core 151 opens the connecting port between the first channel 161 and the second channel 162. At this time, the oil in the back pressure chamber 14 can flow to the second channel 162 through the first channel 161 and flow into the oil pool 21, and finally enter the suction chamber 17.

[0033] Embodiment 2:

[0034] An air conditioner comprises the scroll compressor provided by the present invention.

[0035] Embodiment 3:

[0036] A vehicle comprises the scroll compressor provided by the present invention.

[0037] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A scroll compressor, characterized in that: It comprises a pressure relief channel (16) and a pressure relief device (15), wherein: The pressure relief channel (16) is connected to the back pressure chamber (14) of the scroll compressor and the pressure relief channel (16) is arranged on the crankshaft (20) of the scroll compressor; when the pressure of the back pressure chamber (14) is greater than a preset value, the pressure relief device (15) opens the pressure relief channel (16) so that the oil in the back pressure chamber (14) can be discharged through the pressure relief channel (16) to the bearing (24) on the crankshaft (20) away from the back pressure chamber (14); The oil outlet of the pressure relief channel (16) is arranged on the end surface of the crankshaft (20) away from the back pressure chamber (14); the bearing (24) on the side of the crankshaft (20) away from the back pressure chamber (14) is supported on the housing (02) of the scroll compressor, and the bearing (24) and the crankshaft (20) and the inner side wall of the housing (02) form an oil pool (21) connected to the suction chamber (17).

2. The scroll compressor according to claim 1, characterized in that: The pressure relief channel (16) comprises a first channel (161) and a second channel (162); the first channel (161) is connected to the back pressure chamber (14); when the pressure of the back pressure chamber (14) is greater than a preset value, the pressure relief device (15) opens the connecting port between the first channel (161) and the second channel (162) under the action of oil pressure to allow oil to flow from the first channel (161) to the second channel (162).

3. The scroll compressor according to claim 2, characterized in that: The first channel (161) is a through hole arranged on the crankshaft (20), and the second channel (162) is arranged on a side wall of the first channel (161).

4. The scroll compressor according to claim 2, characterized in that: The pressure relief device (15) comprises a valve core (151), an elastic member (152) and a fixed portion (153); the valve core (151) is connected to the fixed portion (153) via the elastic member (152); the fixed portion (153) is fixed on the crankshaft (20); the valve core (151) is located in the pressure relief channel (16); and the valve core (151) can move toward the fixed portion (153) under the action of oil pressure and compress the elastic member (152) until the first channel (161) is connected to the second channel (162).

5. The scroll compressor according to claim 4, characterized in that: The fixing portion (153) is inserted into the pressure relief passage (16) and is located at an end of the crankshaft (20) away from the back pressure chamber (14), and the elastic member (152) is sandwiched between the valve core (151) and the fixing portion (153).

6. The scroll compressor according to claim 4, characterized in that: The valve core (151) is a spherical valve core (151), the cross-sectional shape of the first channel (161) is circular, and the valve core (151) can move along the axial direction of the first channel (161).

7. The scroll compressor according to claim 4, characterized in that: The elastic member (152) is a spring.

8. An air conditioner, characterized in that: Including the scroll compressor described in any one of claims 1-7.

9. A vehicle, characterized in that: Including the scroll compressor described in any one of claims 1-7.

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