A scroll compressor with motor cooling function

Abstract

A scroll compressor with a motor cooling function, the scroll compressor with a motor cooling function comprises a shell, a motor fixing frame is fixed to the inner wall of the shell, the motor fixing frame is provided with a refrigerant channel, the motor fixing frame is provided with a refrigerant inlet and a refrigerant outlet, and the shell is fixed with a refrigerant inlet connector connected to the refrigerant inlet and a refrigerant outlet connector connected to the refrigerant outlet. The present invention arranges a refrigerant channel on the motor fixing frame, and arranges a refrigerant inlet connector and a refrigerant outlet connector on the shell, and by sending the refrigerant from the refrigerant inlet connector, the refrigerant will cool the motor when passing through the refrigerant channel, and the refrigerant that absorbs heat will be discharged from the refrigerant outlet connector, thereby solving the problem of increased ineffective overheating of the compressor caused by motor heat dissipation, and further improving the reliability and operating range of the low-pressure chamber scroll compressor.

Description

Technical Field

[0001] The invention relates to the technical field of compressors, and in particular to a scroll compressor with a motor cooling function. Background Art

[0002] Scroll compressors have the advantages of simple structure, small size, light weight, low noise, high mechanical efficiency and stable operation. For low-pressure scroll compressors, since the motor is placed on the suction side, during the operation of the compressor, the refrigerant on the suction side needs to absorb the heat dissipated by the motor before entering the suction port of the pump body. In this way, the actual superheat of the compressor will increase significantly, that is, there will be a large amount of ineffective overheating, which will have an adverse effect on the reliability and operating range of the compressor. Summary of the invention

[0003] The object of the present invention is to avoid the deficiencies in the prior art and provide a scroll compressor with a motor cooling function, which can solve the problem of increased ineffective overheating of the compressor caused by motor heat dissipation, thereby improving the reliability and operating range of the low-pressure chamber scroll compressor.

[0004] The purpose of the present invention is achieved through the following technical solutions:

[0005] A scroll compressor with a motor cooling function is provided, comprising a housing, a motor fixing frame fixed to the inner wall of the housing, the motor fixing frame being arranged in an annular shape, a refrigerant channel being arranged on the annular body of the motor fixing frame, a refrigerant inlet and a refrigerant outlet being respectively arranged on the outer wall of the motor fixing frame, and a refrigerant inlet connector penetrating the housing and being respectively connected to the refrigerant inlet and a refrigerant outlet connector being connected to the refrigerant outlet being fixed to the housing. A refrigerant channel is arranged on the annular motor fixing frame, a refrigerant inlet and a refrigerant outlet are arranged on the motor fixing frame in coordination with the refrigerant channel, and a refrigerant inlet connector connected to the refrigerant inlet and a refrigerant outlet connector connected to the refrigerant outlet are arranged on the housing, and refrigerant is sent in from the refrigerant inlet connector, the refrigerant will cool the motor when passing through the refrigerant channel on the motor fixing frame, and the refrigerant that has absorbed heat will be discharged from the refrigerant outlet connector, thereby solving the problem of increased ineffective overheating of the compressor caused by motor heat dissipation, thereby improving the reliability and operating range of the low-pressure chamber scroll compressor.

[0006] Furthermore, the refrigerant outlet connector is connected to the middle compression chamber of the compressor. The refrigerant outlet connector is connected to the middle compression chamber of the compressor, and the refrigerant discharged from the refrigerant outlet connector is passed into the middle compression chamber of the compressor, thereby improving the performance of the low-pressure chamber scroll compressor.

[0007] Furthermore, the refrigerant channel is an annular groove provided on the upper end face or the lower end face of the motor fixing frame, the refrigerant inlet and the refrigerant outlet provided on the outer side wall of the motor fixing frame are respectively connected to the annular groove, and a sealing plate for sealing the annular groove is fixed on the upper end face or the lower end face of the motor fixing frame. By providing an annular groove as a refrigerant channel on the upper end face or the lower end face of the motor fixing frame, and fixing a sealing plate for sealing the annular groove on the end face where the annular groove is provided, the refrigerant flowing into the annular groove is prevented from flowing out, so that a complete refrigerant circuit cannot be formed with the refrigerant inlet and the refrigerant outlet.

[0008] Furthermore, a sealing gasket is provided between the motor fixing frame and the sealing plate. A sealing gasket is provided between the motor fixing frame and the sealing plate, and the sealing gasket is used to increase the sealing performance of the sealing plate to prevent the refrigerant flowing into the annular groove from flowing out, thereby failing to form a complete refrigerant circuit with the refrigerant inlet and the refrigerant outlet.

[0009] Furthermore, the refrigerant channel is an annular through hole arranged inside the annular body of the motor fixing frame, and the refrigerant inlet and the refrigerant outlet opened on the outer wall of the motor fixing frame are respectively connected to the annular through hole. For the setting of the refrigerant channel, an annular through hole can also be arranged inside the annular body of the motor fixing frame, and the annular through hole can be used as the refrigerant channel, so that the motor can also be cooled, and the sealing plate and the sealing gasket can be omitted.

[0010] Furthermore, at least one sealing groove for installing a sealing ring is provided on the outer circumference of the refrigerant inlet connector and the refrigerant outlet connector, and an axial through hole is provided in the axial direction of the refrigerant inlet connector and the refrigerant outlet connector. At least one sealing groove for installing a sealing ring is provided on the outer circumference of the refrigerant inlet connector and the refrigerant outlet connector, and the sealing performance between the refrigerant inlet connector and the refrigerant outlet connector and the housing is increased by installing a sealing ring on the sealing groove, thereby preventing refrigerant leakage and affecting the cooling effect of the motor.

[0011] Furthermore, a motor is fixed in the annular body of the motor fixing frame, and a crankshaft is fixed to the rotor of the motor. The motor is used to drive the crankshaft to rotate, and the crankshaft is used to drive the compressor to work.

[0012] Furthermore, a lower bearing is provided at one end of the crankshaft, a lower support ring is provided on the lower bearing, a lower bracket is provided on the outer side of the lower support ring, an eccentric sleeve is provided at the other end of the crankshaft, a movable scroll is provided on the eccentric sleeve, and a fixed scroll is provided in cooperation with the movable scroll. A lower bearing is provided at one end of the crankshaft, the lower bearing is used to install the lower support ring and the lower bracket, the lower support ring and the lower bracket are used to support the crankshaft to prevent the crankshaft from deformation, the eccentric sleeve has radial flexibility, wherein the movable scroll and the fixed scroll are installed oppositely with a phase angle difference of 180 degrees, the eccentric sleeve will move under the drive of the crankshaft to drive the movable scroll, and the movable scroll will mesh with the fixed scroll to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes.

[0013] Furthermore, an upper bracket is provided at the bottom of the movable scroll, a main balance block is provided on the crankshaft in the upper bracket, a support plate is provided between the upper bracket and the movable scroll, and a cross slip ring is provided between the support plate and the movable scroll. When the compressor is working normally, the fixed scroll is tightly pressed on the movable scroll by the axial force of the gas in the medium-pressure chamber formed on the back of the fixed scroll, and the movable scroll is tightly pressed on the support plate on the upper bracket due to the action of the high-pressure gas in the compression chamber and the action force of the fixed scroll. At this time, the upper bracket and support plate provided at the bottom of the movable scroll can play a good supporting role to ensure the normal operation of the compressor. The main balance block provided on the crankshaft in the upper bracket is used to maintain the balance of the crankshaft during rotation. At the same time, under the anti-rotation restriction of the cross slip ring, the movable scroll performs translational motion around the center of the crankshaft with a fixed radius.

[0014] Furthermore, a sealing cover is provided on the top of the static scroll, a partition plate is provided on the top of the sealing cover, an exhaust port is provided on the partition plate, and a check valve is provided on the exhaust port. A sealing cover is provided on the top of the static scroll, and during the operation of the compressor, the sealing cover can float axially to form a sealed exhaust channel with the partition plate, the exhaust port provided on the partition plate is used to discharge the gas in the exhaust channel, and the check valve is used to prevent external gas from flowing into the exhaust channel.

[0015] Beneficial effects of the present invention: A scroll compressor with a motor cooling function of the present invention comprises a shell, an inner wall of the shell is fixed with a motor fixing frame, the motor fixing frame is arranged in a ring shape, a refrigerant channel is arranged on the annular body of the motor fixing frame, and a refrigerant inlet and a refrigerant outlet connected to the refrigerant channel are respectively opened on the outer wall of the motor fixing frame, and the shell is fixed with a refrigerant inlet connector that penetrates the shell and is respectively connected to the refrigerant inlet and a refrigerant outlet connector that is connected to the refrigerant outlet. The present invention arranges a refrigerant channel on an annular motor fixing frame, and simultaneously opens a refrigerant inlet and a refrigerant outlet on the motor fixing frame in coordination with the refrigerant channel, and arranges a refrigerant inlet connector connected to the refrigerant inlet and a refrigerant outlet connector connected to the refrigerant outlet on the shell. By sending the refrigerant in from the refrigerant inlet connector, the refrigerant will cool the motor when passing through the refrigerant channel on the motor fixing frame, and the refrigerant that has absorbed heat will be discharged from the refrigerant outlet connector, thereby solving the problem of increased ineffective overheating of the compressor caused by motor heat dissipation, and further improving the reliability and operating range of the low-pressure chamber scroll compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The invention is further described using the accompanying drawings, but the embodiments in the accompanying drawings do not constitute any limitation to the invention. A person skilled in the art can obtain other drawings based on the following drawings without creative work.

[0017] Figure 1 It is a schematic diagram of the overall structure of a scroll compressor with a motor cooling function according to the present invention.

[0018] Figure 2 yes Figure 1 Schematic diagram of the structure at A in FIG.

[0019] Figure 3 It is an exploded view of the motor fixing frame, the sealing gasket and the sealing plate of the present invention.

[0020] Figure 4 It is a structural schematic diagram of the motor fixing bracket of the present invention.

[0021] Figure 5 It is a structural schematic diagram of the refrigerant inlet connector of the present invention.

[0022] Figure 6 It is a system connection schematic diagram of a scroll compressor with motor cooling function of the present invention.

[0023] Figure 7 It is a structural cross-sectional view of the motor fixing bracket in Example 3 of the present invention.

[0024] Figure 8 It is a structural vertical sectional view of the motor fixing bracket in Example 3 of the present invention.

[0025] The figure includes:

[0026] Shell 1, motor fixing frame 2, refrigerant channel 3, refrigerant inlet 4, refrigerant outlet 5, refrigerant inlet connector 6, refrigerant outlet connector 7, sealing plate 8, boss 9, screw hole 10, sealing gasket 11, sealing groove 12, axial through hole 13, motor 14, crankshaft 15, lower bearing 16, lower support ring 17, lower bracket 18, eccentric sleeve 19, movable scroll 20, fixed scroll 21, upper bracket 22, main balancing block 23, support plate 24, cross slip ring 25, sealing cover 26, partition plate 27, compressor 01, condenser 02, second throttle valve 03, first throttle valve 04, evaporator 05, one-way valve 06. DETAILED DESCRIPTION

[0027] The present invention is further described in conjunction with the following examples.

[0028] Example 1

[0029] A scroll compressor with a motor cooling function according to this embodiment, such as Figure 1-5 As shown, it includes a shell 1, the inner wall of the shell 1 is fixed with a motor fixing frame 2, the motor fixing frame 2 is arranged in a ring shape, a refrigerant channel 3 is arranged on the annular body of the motor fixing frame 2, and the outer wall of the motor fixing frame 2 is respectively provided with a refrigerant inlet 4 and a refrigerant outlet 5 connected to the refrigerant channel 3, and the shell 1 is fixed with a refrigerant inlet connector 6 that penetrates the shell 1 and is respectively connected to the refrigerant inlet 4 and a refrigerant outlet connector 7 that is connected to the refrigerant outlet 5. A refrigerant channel 3 is provided on the annular motor mounting frame 2, and a refrigerant inlet 4 and a refrigerant outlet 5 are opened on the motor mounting frame 2 in coordination with the refrigerant channel 3, and a refrigerant inlet connector 6 connected to the refrigerant inlet 4 and a refrigerant outlet connector 7 connected to the refrigerant outlet 5 are provided on the shell 1. By sending the refrigerant in from the refrigerant inlet connector 6, the refrigerant will cool the motor when passing through the refrigerant channel 3 on the motor mounting frame 2, and the refrigerant that has absorbed the heat will be discharged from the refrigerant outlet connector 7, thereby solving the problem of increased ineffective overheating of the compressor caused by the heat dissipation of the motor, and the refrigerant discharged from the refrigerant outlet connector 7 is passed into the middle compression chamber of the compressor, thereby improving the reliability (improving the reliability under harsh working conditions such as high pressure ratio) and the operating range of the low-pressure chamber scroll compressor.

[0030] The refrigerant outlet connector 7 is connected to the intermediate compression chamber of the compressor. The refrigerant outlet connector 7 is connected to the intermediate compression chamber of the compressor, and the refrigerant discharged from the refrigerant outlet connector 7 is passed into the intermediate compression chamber of the compressor, thereby improving the performance of the low-pressure chamber scroll compressor (power reduction).

[0031] The refrigerant channel 3 is an annular groove provided on the upper and lower end faces of the motor fixing frame. The refrigerant inlet 4 and the refrigerant outlet 5 provided on the outer side wall of the motor fixing frame 2 are respectively connected to the annular groove. The upper and lower end faces of the motor fixing frame 2 are fixed with a sealing plate 8 for sealing the annular groove. By providing an annular groove as the refrigerant channel 3 on the upper and lower end faces of the motor fixing frame 2, two independent refrigerant channels 3 can be formed on the two end faces accordingly. At the same time, the sealing plate 8 for sealing the annular groove is fixed on the end face where the annular groove is provided to prevent the refrigerant flowing into the annular groove from flowing out, so that a complete refrigerant circuit cannot be formed with the refrigerant inlet 4 and the refrigerant outlet 5. Two groups can be provided for the refrigerant inlet 4 and the refrigerant outlet 5, each group corresponding to an independent refrigerant channel 3. For the installation of the sealing plate 8, a plurality of integrally formed bosses 9 can be provided on the outer circumference of the motor fixing frame, and screw holes 10 are provided on the bosses 9. The corresponding sealing plate 8 is designed according to the shape of the motor fixing frame 2 and fixed on the bosses 9 by screws.

[0032] A sealing gasket 11 is provided between the motor fixing frame 2 and the sealing plate 8. A sealing gasket 11 is provided between the motor fixing frame 2 and the sealing plate 8, and the sealing gasket 11 is used to increase the sealing performance of the sealing plate 8, and prevent the refrigerant flowing into the annular groove from flowing out, so as to fail to form a complete refrigerant circuit with the refrigerant inlet 4 and the refrigerant outlet 5.

[0033] At least one sealing groove 12 for installing a sealing ring is provided on the outer circumference of the refrigerant inlet connector 6 and the refrigerant outlet connector 7, and an axial through hole 13 is provided in the axial direction of the refrigerant inlet connector 6 and the refrigerant outlet connector 7. At least one sealing groove 12 for installing a sealing ring is provided on the outer circumference of the refrigerant inlet connector 6 and the refrigerant outlet connector 7. By installing a sealing ring on the sealing groove 12, the sealing performance between the refrigerant inlet connector 6 and the refrigerant outlet connector 7 and the housing 1 is increased to prevent refrigerant leakage and affect the cooling effect of the motor.

[0034] A motor 14 is fixed in the annular body of the motor fixing frame 2, and a crankshaft 15 is fixed to the rotor of the motor 14. The motor 14 is used to drive the crankshaft 15 to rotate, and the crankshaft 15 is used to drive the compressor to work.

[0035] A lower bearing 16 is provided at one end of the crankshaft 15, a lower support ring 17 is provided on the lower bearing 16, a lower bracket 18 is provided on the outer side of the lower support ring 17 of the lower bearing 16, and an eccentric sleeve 19 is provided at the other end of the crankshaft 15, a movable scroll 20 is provided on the eccentric sleeve 19, and a fixed scroll 21 is provided in cooperation with the movable scroll 20. A lower bearing 16 is provided at one end of the crankshaft 15, and the lower bearing 16 is used to install the lower support ring 17 and the lower bracket 18, and the lower support ring 17 and the lower bracket 18 are used to support the crankshaft 15 to prevent the crankshaft 15 from deforming, and the eccentric sleeve 19 has radial flexibility, wherein the movable scroll 20 and the fixed scroll 21 are installed oppositely with a phase angle difference of 180 degrees, and the eccentric sleeve 19 will move under the drive of the crankshaft 15 to drive the movable scroll 20, and the movable scroll 20 will mesh with the fixed scroll 21 to form a series of crescent-shaped closed cavities that are isolated from each other and have continuously changing volumes.

[0036] An upper bracket 22 is provided at the bottom of the movable scroll 20, a main balancing block 23 is provided on the crankshaft 15 in the upper bracket 22, a support plate 24 is provided between the upper bracket 22 and the movable scroll 20, and a cross slip ring 25 is provided between the support plate 24 and the movable scroll 20. When the compressor is working normally, the fixed scroll 21 is tightly pressed on the movable scroll 20 by the axial force of the gas in the medium-pressure chamber formed on the back of the fixed scroll 21, and the movable scroll 20 is tightly pressed on the support plate 24 on the upper bracket 22 due to the action of the high-pressure gas in the compression chamber and the action force of the fixed scroll 21. At this time, the upper bracket 22 and the support plate 24 provided at the bottom of the movable scroll 20 can play a good supporting role to ensure the normal operation of the compressor. The main balancing block 23 provided in the upper bracket 22 on the crankshaft 15 is used to maintain the balance of the crankshaft 15 during rotation. At the same time, under the anti-rotation restriction of the cross slip ring 25, the movable scroll 20 performs translational motion around the center of the crankshaft 15 with a fixed radius.

[0037] A sealing cover 26 is provided on the top of the fixed scroll 21, a partition plate 27 is provided on the top of the sealing cover 26, an exhaust port is provided on the partition plate 27, and a check valve is provided on the exhaust port. A sealing cover 26 is provided on the top of the fixed scroll 21. During the operation of the compressor, the sealing cover 26 can float axially to form a sealed exhaust passage with the partition plate 27. The exhaust port provided on the partition plate 27 is used to exhaust the gas in the exhaust passage, and the check valve is used to prevent external gas from flowing into the exhaust passage.

[0038] When the compressor is running, Figure 6As shown, part of the refrigerant coming out of the condenser 02 is throttled by the first throttle valve 04, enters the annular grooves opened on the two end surfaces of the motor fixing frame 2 through the axial through hole 13 on the refrigerant inlet connector 6, and then is discharged from the compressor 01 through the axial through hole 13 on the refrigerant outlet connector 7, and then is sprayed into the compressor medium pressure cavity through the one-way valve 06 for air replenishment. In this way, the heat emitted by the compressor motor is taken away by part of the refrigerant drawn from the condenser 02, which can effectively reduce the invalid superheat of the refrigerant on the suction side, and the performance, reliability and operating range of the compressor can be improved. At the same time, this part of the refrigerant after the heat-absorbing motor is sprayed into the compressor medium pressure cavity through the one-way valve 06, and the performance, reliability and operating range of the compressor can be further improved. Another part of the refrigerant coming out of the condenser 02 is throttled by the second throttle valve 03, enters the evaporator 05 for heat exchange, and finally enters the compressor 01.

[0039] Example 2

[0040] The other structures of this embodiment are the same as those of Embodiment 1, except that the refrigerant channel 3 is an annular groove provided on one of the upper end face or the lower end face of the motor fixing bracket 2, and accordingly only one independent refrigerant channel 3 can be formed on one end face.

[0041] Example 3

[0042] The other structures of this embodiment are the same as those of embodiment 1. Figure 7-8 As shown, the difference is that the refrigerant channel 3 is an annular through hole arranged inside the annular body of the motor fixing frame 2, and the refrigerant inlet 4 and the refrigerant outlet 5 opened on the outer wall of the motor fixing frame 2 are respectively connected to the annular through hole. For the setting of the refrigerant channel 3, an annular through hole can be arranged inside the annular body of the motor fixing frame 2, and the annular through hole can be used as the refrigerant channel 3, so that the motor can also be cooled, and the sealing plate 8 and the sealing gasket 11 can be omitted.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention, rather than to limit the scope of protection of the present invention. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be modified or replaced by equivalents without departing from the essence and scope of the technical solution of the present invention.

Claims

1. A scroll compressor with a motor cooling function, comprising a housing, an inner wall of which is fixed a motor fixing bracket, characterized in that: The motor fixing frame is arranged in an annular shape, a refrigerant channel is arranged on the annular body of the motor fixing frame, a refrigerant inlet and a refrigerant outlet connected to the refrigerant channel are respectively opened on the outer wall of the motor fixing frame, and a refrigerant inlet connector and a refrigerant outlet connector which penetrate through the shell and are respectively connected to the refrigerant inlet and the refrigerant outlet are fixed to the shell; The refrigerant outlet connector is connected to the middle compression chamber of the compressor; The refrigerant channel is an annular groove opened on the upper end surface or the lower end surface of the motor fixing frame, the refrigerant inlet and the refrigerant outlet opened on the outer side wall of the motor fixing frame are respectively connected to the annular groove, and a sealing plate for sealing the annular groove is fixed on the upper end surface or the lower end surface of the motor fixing frame; a sealing gasket is arranged between the motor fixing frame and the sealing plate; Or, the refrigerant channel is an annular through hole arranged inside the annular body of the motor fixing frame, and the refrigerant inlet and the refrigerant outlet opened on the outer wall of the motor fixing frame are respectively connected to the annular through hole; At least one sealing groove for installing a sealing ring is provided on the outer circumferential surface of the refrigerant inlet connector and the refrigerant outlet connector, and an axial through hole is provided in the axial direction of the refrigerant inlet connector and the refrigerant outlet connector.

2. A scroll compressor with motor cooling function as claimed in claim 1, characterized in that: A motor is fixed in the annular body of the motor fixing frame, and a crankshaft is fixed to the rotor of the motor.

3. A scroll compressor with motor cooling function as claimed in claim 2, characterized in that: A lower bearing is provided at one end of the crankshaft, a lower support ring is provided on the lower bearing, a lower bracket is provided on the outer side of the lower support ring, an eccentric sleeve is provided at the other end of the crankshaft, a movable scroll is provided on the eccentric sleeve, and a fixed scroll is provided in combination with the movable scroll.

4. A scroll compressor with motor cooling function as claimed in claim 3, characterized in that: An upper bracket is arranged at the bottom of the movable scroll, a main balance block is arranged on the crankshaft and located inside the upper bracket, a support plate is arranged between the upper bracket and the movable scroll, and a cross slip ring is arranged between the support plate and the movable scroll.

5. A scroll compressor with motor cooling function as claimed in claim 3, characterized in that: A sealing cover is disposed on the top of the static vortex disk, a partition plate is disposed on the top end of the sealing cover, an exhaust port is disposed on the partition plate, and a check valve is disposed on the exhaust port.

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