Oil-free scroll compressor with high cooling efficiency and high reliability

Abstract

The application discloses an oil-free scroll compressor with high cooling efficiency and high reliability, which comprises a main frame, a moving scroll disc, a static scroll disc, a crankshaft and a shaft sleeve, the static scroll disc is fixed on the end face of the main frame, the moving scroll disc and the shaft sleeve are fixed with each other in the main frame, the static scroll disc and the moving scroll disc are engaged with each other to form a compression cavity, a bearing seat is arranged on the shaft sleeve, the crankshaft and the crank are connected with the shaft sleeve through bearings and the bearing seat respectively, the crankshaft is connected with a motor, a wind isolation plate is arranged between the back of the moving scroll disc and the bearing seat, the wind isolation plate is used for isolating hot air or hot radiation from directly contacting the bearing seat, and the motor and the crankshaft of the main frame of the compressor are directly connected through a shaft coupling transmission. The application can make the cooling effect of the moving scroll disc and the static scroll disc better, the service life of the bearing of the moving scroll disc or the lubricating grease thereof is longer and more reliable, and the concentricity precision of the motor and the main frame is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of dry oil-free air compressors, in particular to an oil-free scroll compressor with high-efficiency cooling and high reliability. BACKGROUND

[0002] The scroll compressor mainly comprises a dynamic scroll plate, a static scroll plate, a crankshaft, a motor and the like. The motor drives the dynamic scroll plate to rotate through the crankshaft, and the dynamic scroll plate and the static scroll plate are engaged to form a compression chamber. The back fin of the dynamic scroll plate of the existing compressor cannot be provided with denser fins due to the space of the mold, and most of the fins on the back of the existing dynamic scroll plate are flat structures. The contact area between air and the fin is small, the heat exchange effect is poor, the temperature is high, the material strength is reduced, and the reliability cannot be guaranteed. In addition, the central part of the dynamic scroll plate is the position with the highest temperature of the heat source, which corresponds to the central main bearing, so that the temperature of the main bearing is particularly high, thereby shortening the service life of the bearing and its lubricating grease or increasing the requirement for the selection of the bearing. At the same time, the heat at the central position of the dynamic scroll plate flows along the fin channel to the outlet end of the fin, and the hot air is just directed at the dynamic plate bearing, so that the temperature of the bearing at this position is also particularly high, thereby shortening the service life of the bearing and its lubricating grease or increasing the requirement for the selection of the bearing, so that the reliability of the main machine cannot be guaranteed. Similarly, due to the limitations of the die-casting mold, the fin thickness of the existing compressor cannot be too thin and the fin spacing cannot be too small, thereby affecting the heat exchange effect. At the same time, the area on the back of the static scroll plate is limited, and the high-temperature heat in the heat area cannot be effectively and timely released. The existing air-cooled static scroll plate fin surface is provided with a cover plate, and the spacing between the cover plate and the fin on the static scroll plate forms a series of independent cooling channels. From the actual application, the temperature of the cover plate surface is very high after the static scroll plate fin is cooled by air. In addition, the installation concentricity of the main machine and the motor of the existing compressor is insufficient, which causes the use concentricity to be poor, the main machine is easily damaged, or the existing main machine and motor are belt driven, the belt driving is subjected to a large radial force, the belt has a short service life, the belt driving noise is large, etc., so that the oil-free scroll main machine and the split motor cannot be directly connected by a shaft coupling, and most of them are belt driven or coaxial motor installation (the compressor crankshaft and the motor shaft are the same shaft). SUMMARY

[0003] The present application aims to overcome the shortcomings of the prior art, and provides an oil-free scroll compressor with high-efficiency cooling and high reliability, which has better cooling effect of the dynamic scroll plate and the static scroll plate, longer service life of the bearing or its lubricating grease of the dynamic scroll plate, is more reliable, and can realize direct connection installation of the motor and the main machine with higher concentricity precision.

[0004] The application is realized by the technical scheme that the oil-free scroll compressor with high cooling efficiency and high reliability comprises a main frame, a moving scroll disc, a static scroll disc, a crankshaft, a shaft sleeve and a crank, the static scroll disc is fixed on the end face of the main frame, the moving scroll disc and the shaft sleeve are fixed with each other and located in the main frame, the static scroll disc and the moving scroll disc are engaged with each other to form a compression cavity, a bearing seat is arranged on the shaft sleeve, the crankshaft and the crank are connected with the shaft sleeve through bearings and the bearing seat respectively, the crankshaft is connected with a motor, the motor drives the moving scroll disc to rotate through the crankshaft, an air isolation plate is arranged between the moving disc fin on the back face of the moving scroll disc and the bearing seat, the air isolation plate is used for isolating hot air or heat radiation to avoid that the hot air or heat radiation directly contacts the bearing seat, and a shaft coupling is used for directly connecting the motor and the crankshaft of the compressor main machine.

[0005] Further, the air isolation plate is made of heat insulation material.

[0006] Further, the moving disc fin on the central part of the moving scroll disc is provided with a concave-convex groove structure, and the heat dissipation area of the moving disc fin is increased through the concave-convex groove structure.

[0007] Further, a coupling disc is arranged between the main frame and the motor, the coupling disc comprises a disc body, the disc body is in a semicircular structure, one end of the disc body is provided with a ring-shaped connecting body, the other end of the disc body is provided with a cylindrical connecting body, the ring-shaped connecting body is connected with the motor, the end face of the cylindrical connecting body is connected with the main frame through a rear bearing seat and a transition flange, the coupling disc is used for keeping the output shaft of the motor and the crankshaft concentric, and directly connecting transmission of the compressor main machine and the motor is realized.

[0008] Further, a volute is arranged in the disc body, a centrifugal fan wheel is arranged in the volute, the centrifugal fan wheel is arranged on the crankshaft, the volute is communicated with the main frame through an air guide channel, the air guide channel is used for guiding cooling air flow generated by the centrifugal fan wheel to the air inlet side of the moving disc fin and the air inlet side of the static disc fin, and a protective net is arranged on the disc body.

[0009] Further, the shaft coupling is arranged in the disc body, one end of the shaft coupling is connected with the output shaft of the motor, the other end of the shaft coupling is provided with a left half block, a supporting plate of the centrifugal fan wheel is located between the left half block and a secondary balance block, the left half block and the secondary balance block are fixed through bolts, and the left half block is locked through an end face retainer ring and the crankshaft.

[0010] The application discloses an oil-free scroll compressor with high cooling efficiency and high reliability, which comprises a main frame, a moving scroll disc, a static scroll disc, a crankshaft, a shaft sleeve and a crank handle, the static scroll disc is fixed on the end face of the main frame, the moving scroll disc and the shaft sleeve are fixed with each other and located in the main frame, the static scroll disc and the moving scroll disc are engaged with each other to form a compression cavity, a bearing seat is arranged on the shaft sleeve, the crankshaft and the crank handle are connected with the shaft sleeve through bearings and the bearing seat respectively, the crankshaft is connected with a motor, the motor drives the moving scroll disc to rotate through the crankshaft, a cooling mechanism for secondary heat dissipation is arranged on the static disc fin surface of the back surface of the static scroll disc, the cooling mechanism is used for absorbing and dissipating the heat of the static disc fin, and the motor and the crankshaft of the compressor main frame are directly connected through a shaft coupling.

[0011] Further, the cooling mechanism comprises a heat dissipation plate, and a plurality of heat dissipation fins are arranged on the heat dissipation plate.

[0012] Further, the cooling mechanism comprises a heat dissipation plate, and a plurality of heat dissipation fins are arranged on the heat dissipation plate.

[0013] Further, the cooling mechanism comprises a heat dissipation plate, and a plurality of heat dissipation fins are arranged on the heat dissipation plate.

[0014] Compared with the prior art, the application has the following beneficial effects:

[0015] 1. By arranging the air isolation plate between the dynamic disc fin on the back surface of the moving scroll disc and the bearing seat, hot air passes through the hot air layer, cold air passes through the cold air layer, the air isolation plate isolates the hot air or heat radiation, direct contact of the hot air or heat radiation with the bearing seat is avoided, meanwhile, the cold air passes through between the air isolation plate and the bearing seat, so that the surface of the bearing seat can be cooled, and the temperature for use of the bearing is reduced under the double effects, the service life of the bearing or its lubricating grease is prolonged, the reliability of the main machine is higher, and the service life is longer.

[0016] 2. The concave-convex groove structure is arranged on the dynamic disc fin at the central part of the moving scroll disc, the heat dissipation area at the highest temperature position of the moving scroll disc is effectively increased, the exhaust temperature is reduced, the material is used at a lower temperature, the strength is higher, and the reliability is higher.

[0017] 3. By setting a heat dissipation plate for secondary heat dissipation on the fin surface of the static disc, the heat dissipation plate is provided with fins, or a cold liquid plate for secondary heat dissipation is set on the fin surface of the static disc, the heat of the hot air passing through the static disc fin or the fin channel is transferred to the fins or the cold liquid plate, and the static scroll disc is cooled again by the newly set fins and the cold liquid plate for secondary heat dissipation, further absorbing the heat of the static scroll disc and dissipating it, finally reducing the exhaust temperature, so that the static scroll disc material has higher strength and is more reliable at a lower temperature.

[0018] In addition, the cooling liquid flowing through the cold liquid plate is recovered into the cooler and cooled by the cooling fan, and then the cooling liquid in the cooler is circulated into the cold liquid plate under the action of the circulating pump, the cold liquid inlet is on the same side as the air duct, that is, on the side of the air duct, and the cooling effect is better. The static scroll disc is cooled by the combination of the static disc fin and the cold liquid plate, which has high reliability. Since the cooling fan and the circulating pump of the cold liquid plate have a certain risk of failure, the static disc fin is forced cooling. Therefore, compared with the static scroll disc cooled by liquid alone, the machine still has a safe operation effect when the cooling fan and the circulating pump fail.

[0019] 4. The coupling disc connects the main frame and the motor respectively, maintains the installation structure of the existing centrifugal impeller and volute, and enables the compressor main frame and the motor to be directly connected and installed. The circular positioning at both ends of the coupling disc and the circular machining at both ends enable the installation to have high concentricity, thereby improving the concentricity of the main frame and the motor, ensuring the transmission accuracy of the machine, and improving the reliability of the machine.

[0020] 5. The coupling, the centrifugal impeller and the secondary balance block are bolted together, and the centrifugal impeller is clamped between the coupling and the secondary balance block. The coupling and the secondary balance block ensure the concentricity through the same shaft, realize the direct connection and installation of the coupling, can shorten the length of the crankshaft, leave space between the end surface of the crankshaft and the annular of the coupling disc for installing and dismounting the centrifugal impeller or the volute, shorten the total length of the coupling disc or the main frame, and improve the strength of the shaft or the coupling disc. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the embodiment one of the application;

[0022] Figure 2 It is a structural schematic diagram of the embodiment one of the application; Figure 1 It is a sectional view at A-A;

[0023] Figure 3 It is a structural schematic diagram of the dynamic scroll disc of the embodiment one of the application;

[0024] Figure 4 It is a side view of the embodiment one of the application;

[0025] Figure 5 Structure diagram of the orbiting scroll for the second embodiment of the present application;

[0026] Figure 6 Structure diagram of the third embodiment of the present application;

[0027] Figure 7 Structure diagram of the coupling disc for the third embodiment of the present application;

[0028] Figure 8 Structure diagram of the fourth embodiment of the present application;

[0029] Figure 9 Side view of the fourth embodiment of the present application;

[0030] Figure 10 Structure diagram of the fifth embodiment of the present application Figure 1 ;

[0031] Figure 11 Structure diagram of the fifth embodiment of the present application Figure 2 ;

[0032] Figure 12 Structure diagram of the cold liquid plate for the fifth embodiment of the present application;

[0033] Figure 13 is Figure 12 Sectional view at C-C.

[0034] BRIEF DESCRIPTION OF THE DRAWINGS: 1 - main frame, 2 - orbiting scroll, 3 - fixed scroll, 4 - crankshaft, 5 - shaft sleeve, 6 - crank, 7 - bearing seat, 8 - bearing, 9 - motor, 10 - orbiting scroll fin, 11 - air baffle, 12 - fixed scroll fin, 13 - concave-convex groove structure, 14 - coupling disc, 15 - disc body, 16 - annular connecting body, 17 - cylindrical connecting body, 18 - rear bearing seat, 19 - transition flange, 20 - volute, 21 - centrifugal fan wheel, 22 - air duct, 23 - protective net, 24 - shaft coupling, 25 - left half block, 26 - support plate, 27 - auxiliary balance block, 28 - bolt, 29 - end face check ring, 30 - heat dissipation plate, 31 - heat dissipation fin, 32 - heat dissipation fan, 33 - cold liquid plate, 34 - cooler, 35 - cooling fan, 36 - circulating pump, 37 - cold liquid channel, 38 - cold liquid inlet, 39 - cold liquid outlet, 40 - liquid conveying pipeline, 41 - recovery pipeline. DETAILED DESCRIPTION

[0035] Embodiment I: Figures 1 to 4A structure diagram of an oil-free scroll compressor with high cooling efficiency and high reliability is provided for the embodiment, comprising a main frame 1, a moving scroll 2, a static scroll 3, a crankshaft 4, a shaft sleeve 5, a crank 6, the static scroll 3 is fixed on the end face of the main frame 1, the moving scroll 2 and the shaft sleeve 5 are fixed with each other and located in the main frame 1, and the static scroll 3 and the moving scroll 2 are engaged with each other to form a compression chamber, the shaft sleeve 5 is provided with a bearing seat 7, the crankshaft 4 and the crank 6 are connected with the shaft sleeve 5 through bearings 8 and the bearing seat 7 respectively, the crankshaft 4 is connected with a motor 9, the motor 9 drives the moving scroll 2 to rotate through the crankshaft 4, a wind isolation plate 11 is arranged between the moving scroll fin 10 on the back of the moving scroll 2 and the bearing seat 7, the wind isolation plate 11 is used for isolating hot air or heat radiation to avoid direct contact of the hot air or heat radiation with the bearing seat 7, and a direct connection type installation is adopted between the motor 9 and the crankshaft 4 of the compressor main machine through a shaft coupling 24 transmission.

[0036] The wind isolation plate 11 is made of heat insulation material.

[0037] The central part of the moving scroll 2 is the position with the highest heat source temperature, which corresponds to the bearing 8 in the bearing seat 7 in the center of the shaft sleeve 5, so that the temperature of the bearing 8 in the bearing seat 7 in the center of the shaft sleeve 5 is particularly high, and the heat in the center of the moving scroll 2 flows along the moving scroll fin 10 to the outlet end of the moving scroll fin 10, which corresponds to the bearing 8 in the bearing seat 7 on the side of the shaft sleeve 5, so that the temperature of the bearing 8 here is also particularly high, the wind isolation plate 11 is arranged between the moving scroll fin 10 and the bearing seat 7 to make the hot air flow in the hot air layer and the cold air flow in the cold air layer, so as to isolate the hot air or heat radiation and avoid direct contact of the hot air or heat radiation with the bearing seat 7, the wind isolation plate 11 is made of heat insulation material, which can reduce the secondary heat radiation of the wind isolation plate 11 to the bearing seat 7, at the same time, the cooling air flow passes between the wind isolation plate 11 and the bearing seat 7, so that the cooling air flow can cool the surface of the bearing seat 7, and the wind isolation plate 11 and the cooling air flow act on the bearing seat 7 at the same time, so as to reduce the temperature of the bearing 8, prolong the service life of the bearing 8 or its lubricating grease, and make the main machine have longer reliability and service life. Figures 2 to 4 The arrow in the middle indicates the flow direction of the cooling air flow.

[0038] Embodiment two: refer to Figure 5 The difference between the embodiment and the embodiment one is that the moving scroll fin 10 in the central part of the moving scroll 2 is provided with a concave-convex groove structure 13, and the concave-convex groove structure 13 increases the heat dissipation area of the moving scroll fin 10.

[0039] The concave-convex groove structure 13 is arranged on the moving scroll fin 10 in the central part of the moving scroll 2, the heat dissipation area of the moving scroll fin 10 is increased through the concave-convex groove structure 13 without changing the space on the back of the moving scroll 2 and the number of the moving scroll fin 10, the heat dissipation effect of the moving scroll 2 is improved, so as to reduce the temperature of the moving scroll 2 and improve the strength and reliability of the moving scroll 2.

[0040] Embodiment three: reference Figures 6 to 7 The difference between this embodiment and embodiment one is that a coupling disc 14 is arranged between the main frame 1 and the motor 9, the coupling disc 14 comprises a disc body 15, the disc body 15 is in a semicircular structure, one end of the disc body 15 is provided with a ring-shaped connecting body 16, the other end of the disc body 15 is provided with a cylindrical connecting body 17, the ring-shaped connecting body 16 is connected with the motor 9, the end face of the cylindrical connecting body 17 is connected with the transition flange 19 of the main frame 1 through the rear bearing seat 18, the coupling disc 14 is used to keep the output shaft of the motor 9 and the crankshaft 4 concentric, and direct connection transmission of the compressor main frame and the motor is realized.

[0041] The ring-shaped connecting body 16 and the cylindrical connecting body 17 of the coupling disc 14 are integrally formed.

[0042] The rear bearing seat 18 is provided with a bearing for mounting the crankshaft 4, and the rear bearing seat 18 is transitionally connected with the coupling disc 14 through the bearing arranged therein.

[0043] By arranging the ring-shaped connecting body 16 and the cylindrical connecting body 17 at both ends of the disc body 15 in a semicircular structure, the cylindrical connecting body 17 is connected with the transition flange 19 of the main frame 1 through the rear bearing seat 18, and the ring-shaped connecting body 16 is connected with the motor 9, so that the concentricity of the compressor main frame and the motor is improved, the transmission precision of the machine is ensured, and the machine is more reliable.

[0044] The disc body 15 is provided with a volute 20, the volute 20 is provided with a centrifugal impeller 21, the centrifugal impeller 21 is arranged on the crankshaft 4, the volute 20 is communicated with the main frame 1 through a draft tube 22, the draft tube 22 is used to guide the cooling airflow generated by the centrifugal impeller 21 to the air inlet side of the dynamic disc fin 10 and the air inlet side of the static disc fin 12, and the disc body 15 is provided with a protective net 23. The protective net 23 is used to protect people from touching the rotating body coupling 24.

[0045] The centrifugal impeller 21 rotates with the crankshaft 4 to generate cooling airflow, the cooling airflow enters the dynamic disc fin 10 of the dynamic scroll disc 2 and the static disc fin 12 of the static scroll disc 3 from the draft tube 22, and the dynamic scroll disc 2 and the static scroll disc 3 are cooled, the flow direction of the cooling airflow flowing through the dynamic disc fin 10 is as shown in Figure 2 and Figure 3 The flow direction of the cooling airflow flowing through the static disc fin 12 is as shown in Figure 2 and Figure 4 .

[0046] The coupling 24 is arranged in the disc body 15, one end of the coupling 24 is connected with the output shaft of the motor 9, the other end of the coupling 24 is provided with a left half block 25, the supporting plate 26 of the centrifugal impeller 21 is located between the left half block 25 and the auxiliary balance block 27, and the left half block 25 and the auxiliary balance block 27 are fixed through the bolt 28, and the left half block 25 is locked through the end face check ring 29 and the crankshaft 4.

[0047] The coupling 24, the centrifugal impeller 21 and the auxiliary balance block 27 are installed together through the bolt 28, the centrifugal impeller 21 is clamped between the coupling 24 and the auxiliary balance block 27, the coupling 24 and the auxiliary balance block 27 ensure the concentricity through the same shaft (i.e. the crankshaft), realize the direct connection installation of the coupling 24, and at the same time, the length of the crankshaft 4 can be shortened, so that the total length of the coupling disc 14 or the main machine is shortened, and the strength of the shaft or the coupling disc 14 is improved.

[0048] Embodiment four: refer to Figures 8 to 9 An oil-free scroll compressor with high cooling efficiency and high reliability, comprising a main frame 1, a moving scroll 2, a static scroll 3, a crankshaft 4, a shaft sleeve 5, a crank 6, the static scroll 3 is fixed on the end face of the main frame 1, the moving scroll 2 and the shaft sleeve 5 are fixed with each other and located in the main frame 1, and the static scroll 3 and the moving scroll 2 are engaged with each other to form a compression chamber, the shaft sleeve 5 is provided with a bearing seat 7, the crankshaft 4 and the crank 6 are connected with the shaft sleeve 5 through bearings 8 and the bearing seat 7 respectively, the crankshaft 4 is connected with a motor 9, the motor 9 drives the moving scroll 2 to rotate through the crankshaft 4, the static scroll 3 is provided with a cooling mechanism on the surface of the static scroll fin 12 for secondary heat dissipation, the cooling mechanism is used to absorb and dissipate the heat of the static scroll fin 12, and the motor 9 and the crankshaft 4 of the compressor main machine are directly connected and installed through the coupling 24.

[0049] In the embodiment, the cooling mechanism comprises a heat dissipation plate 30, and a plurality of heat dissipation fins 31 are arranged on the heat dissipation plate 30.

[0050] By arranging the heat dissipation plate 30 on the side of the static scroll fin 12 and arranging the heat dissipation fins 31 on the heat dissipation plate 30, the hot air passing through the static scroll fin 12 is transmitted to the heat dissipation fins 31 of the heat dissipation plate 30, and the heat of the static scroll 3 is further absorbed and dissipated, so that the static scroll 3 is cooled, the temperature or exhaust temperature of the static scroll 3 is lower, the material temperature of the static scroll 3 is low, the reliability is high, and the problem of insufficient heat dissipation of the static scroll 3 due to the fact that the mold cannot open enough dense fins is compensated.

[0051] The embodiment further comprises a heat dissipation fan 32, and the heat dissipation fan 32 is arranged on the heat dissipation fin 31, and the heat dissipation fan 32 is provided with one or two.

[0052] The heat dissipation fin 31 can be naturally cooled or forcibly cooled through the heat dissipation fan 32, and the heat dissipation effect of the heat dissipation fin 31 is further enhanced.

[0053] Embodiment five: reference Figures 10 to 13 The difference between this embodiment and embodiment four is that the cooling mechanism comprises a cold liquid plate 33, a cooler 34, a cooling fan 35, and a circulating pump 36. The cold liquid plate 33 is arranged on the side of the static disc fin 12 of the static scroll disc 3. The cold liquid plate 33 is provided with an S-shaped cold liquid channel 37. The cold liquid plate 33 is provided with a cold liquid inlet 38 and a cold liquid outlet 39, which are respectively communicated with the S-shaped cold liquid channel 37. The cold liquid inlet 38 is communicated with the cooler 34 through a liquid conveying pipeline 40. The cold liquid outlet 39 is communicated with the cooler 34 through a recovery pipeline 41. The circulating pump 36 is arranged on the liquid conveying pipeline 40. The cooling fan 35 is arranged below the cooler 34.

[0054] In this embodiment, the cold liquid channel 37 can be replaced by a copper pipe embedded in the cold liquid plate 33. The cooler 34 and the cooling fan 35 can be replaced by a low-temperature evaporative refrigerant device.

[0055] The cold liquid inlet 38 and the air duct 22 are located on the same side, so that the cooling liquid of the cooler 34 and the cooling air flow generated by the centrifugal impeller 21 flow from the low-temperature area to the high-temperature area at the same time, without secondary heating, and the cooling effect is better.

[0056] The cooling liquid can be water, oil, refrigerant, etc. according to the local temperature requirements, and can not be frozen and blocked.

[0057] The cooling fan 35 cools the cooling liquid in the cooler 34. Under the action of the circulating pump 36, the cooling liquid in the cooler 34 is conveyed into the cold liquid channel 37 through the cold liquid inlet 38, so that the cold liquid plate 33 and the static disc fin 12 combine to form a wind cooling and liquid cooling dual-action cooling. The cold liquid flows through the cold liquid channel 37, is recovered to the cooler 34 through the cold liquid outlet 39, and is recycled. Since the static disc fin 12 is cooled by the centrifugal impeller 21, which is a forced air cooling, it has high reliability. However, the cooling fan 35 and the circulating pump 36 of the cold liquid plate 33 have a certain risk of failure. After the cooling effect of the cold liquid plate 33 is lost, the machine has high running safety, and can still be temporarily used. Compared with the separate liquid-cooled static disc, it still has the effect of safe operation. In addition, by using the cold liquid plate 33 to liquid-cool the static scroll disc 3, the secondary liquid cooling effect is better than the secondary air cooling effect, so that the temperature of the static scroll disc 3 and the exhaust temperature are lower.

[0058] The above detailed description is a specific description of the feasible embodiments of the present application, which is not used to limit the patent scope of the present application. Any equivalent implementation or change without departing from the present application shall be included in the patent scope of the present application.

Claims

1. An oil-free scroll compressor with high cooling efficiency and high reliability, comprising a main frame, a moving scroll, a stationary scroll, a crankshaft, a shaft sleeve, and a crank, the stationary scroll is fixed on the end face of the main frame, the moving scroll and the shaft sleeve are fixed with each other and located in the main frame, and the stationary scroll and the moving scroll are engaged with each other to form a compression chamber, a bearing seat is arranged on the shaft sleeve, the crankshaft and the crank are connected with the shaft sleeve through bearings and the bearing seat respectively, the crankshaft is connected with a motor, and the motor drives the moving scroll to rotate through the crankshaft, characterized in that: The air baffle is arranged between the dynamic disc fin of the back surface of the moving scroll disc and the bearing seat, and is used for isolating hot air or heat radiation to avoid direct contact of the hot air or heat radiation with the bearing seat. A coupling disc is arranged between the main frame and the motor, and the coupling disc comprises a disc body in a semicircular structure, an annular connecting body at one end of the disc body, and a cylindrical connecting body at the other end of the disc body. The disc body is provided with a volute, and the volute is provided with a centrifugal fan wheel arranged on the crankshaft.

2. The oil-free scroll compressor with high cooling efficiency and high reliability according to claim 1, characterized in that: The air baffle is made of heat insulation material.

3. The oil-free scroll compressor with high cooling efficiency and high reliability as claimed in claim 1 wherein: The dynamic disc fin at the central part of the moving scroll disc is provided with a concave-convex groove structure to increase the heat dissipation area of the dynamic disc fin.

4. The oil-free scroll compressor with high cooling efficiency and high reliability as claimed in claim 1 wherein: The coupling is arranged in the disc body, one end of the coupling is connected with the output shaft of the motor, the other end of the coupling is provided with a left half block, the supporting plate of the centrifugal fan wheel is located between the left half block and a secondary balance block, and the left half block and the secondary balance block are fixed by bolts.

5. The oil-free scroll compressor with high cooling efficiency and high reliability according to claim 1, wherein a cooling mechanism for secondary heat dissipation is arranged on the static disc fin of the back surface of the static scroll disc, the cooling mechanism is used to absorb and dissipate the heat of the static disc fin, and the cooling mechanism comprises a cold liquid plate, a cooler, a cooling fan and a circulating pump.

6. The oil-free scroll compressor with high cooling efficiency and high reliability as claimed in claim 5 wherein: The cooling mechanism comprises a heat dissipation plate provided with a plurality of heat dissipation fins.

7. The oil-free scroll compressor with high cooling efficiency and high reliability as claimed in claim 6 wherein: Further comprising a heat dissipation fan arranged on the heat dissipation fins, and the heat dissipation fan is provided with one or two.

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