EP3239531A1

EP3239531A1 - A scroll disk heat dissipation assembly of scroll compressors

Info

Publication number: EP3239531A1
Application number: EP17166723.1A
Authority: EP
Inventors: Daomin Xu; Min Wang
Original assignee: Zhejiang Jieneng Compression Equipment Co Ltd
Current assignee: Zhejiang Jieneng Compression Equipment Co Ltd
Priority date: 2016-04-25
Filing date: 2017-04-17
Publication date: 2017-11-01
Anticipated expiration: 2037-04-17
Also published as: CN106194754B; EP3239531B1; CN206054311U; CN106194754A

Abstract

The present scroll disk heat dissipation assembly of scroll compressors, its scroll disk comprises a disk body (1), and the heat dissipation assembly comprises several long stripped heat sinks (2)on the back of the disk body. These heat sinks are arranged in the same direction, and air ducts (3) are formed in between two adjacent heat sinks. Each heat sink is bended into a wave shape and the wave-shaped heat sink has several peaks (22) and several troughs (23) in the lengthwise direction. The locations of peaks and troughs in two adjacent heat sinks are aligned. In any heat sink, there is at least one peak located in a triangular zone (6), which is enclosed by the corresponding peak on the heat sink above and the two troughs on the two sides of that peak on that same heat sink.

Description

Field of Invention

The present invention relates to the technical field of compressors, and more particularly relates to a scroll disk heat dissipation assembly of scroll compressors.

Related Art

Due to the advantages of high efficiency, low noise, small size, being beneficial to save energy conservation and protect the environment, scroll air compressors are widely used in situations where compressed air is needed as in industry, agriculture, transportation, civil pneumatic power and some other industries. The main moving part of scroll air compressors is the scroll disk. The scroll disk only meshes and does not wear, so the service life is longer than that of piston compressors and screw compressors. They are ideal power source for pneumatic machines. In scroll air compressors, the scroll disk, as the main moving part, is divided into the orbiting disk and the fixed disk. Scrolls are arranged in the orbiting disk and the fixed disk. In general, the orbiting disk and the fixed disk match and form the compressing pocket. When the orbiting disk is driven by a crankshaft and translates along a certain circular path, the scroll of the orbiting disk moves relative to the scroll of the fixed disk. Hence, the compressing pocket formed by them moves and the volume changes, so as to implement suction, compression, discharge and then complete the air compression process. During the air compression process, a large amount of heat will be generated, so it is necessary to cool the orbiting disk and the fixed disk. Otherwise, the orbiting disk and the fixed disk will deform because of suffering high temperature and forces.
One prior art ( CN201610122948.3 ), oil-free scroll air compressor comprises a rack, a fixed disk, an orbiting disk, a shaft sleeve, a crankshaft and a pinned crank. The fixed disk fits and is installed onto the end face of the rack. The orbiting disk fits and is installed onto the end face of the shaft sleeve, and is located inside the rack. The pinned crank bearing of one end of the pinned crank is installed onto the rack, and the pinned crank bearing of the other end of the pinned crank is installed onto the shaft sleeve. The sleeve is constrained by at least three pinned cranks. The fixed disk and the orbiting disk driven by the crankshaft form a sealing pocket, which continuously implement the working process of suction, compression and discharge. There are stepped orbiting disk fins arranged on the back of the orbiting disk, stepped shaft sleeves are installed onto the orbiting disk fins, and at each bearing seat of the shaft sleeves there is a clearance with the orbiting disk fins. The orbiting disk dissipates the heat through the orbiting disk fins on the back. Besides heat dissipation, the orbiting disk fins can also reinforce the strength of the orbiting disk in the transversal direction. However, the orbiting disk lacks stiffening structures in the longitudinal direction, which makes the orbiting disk prone to deformation in the plane.

SUMMARY OF THE INVENTION

One objective of one embodiment of the present invention is to avoid the issues stated above in the prior art, and to provide a scroll disk heat dissipation assembly of scroll compressors. One embodiment of the scroll disk heat dissipation assembly of scroll compressors can reinforce the strength of the scroll disk, and prevent the scroll disk from deforming.
One objective of one embodiment of the present invention can be achieved by the following technical proposal:

A scroll disk heat dissipation assembly of scroll compressors, its scroll disk comprises a disk body, and the heat dissipation assembly comprises several long stripped heat sinks on the back of the disk body. These heat sinks are arranged in the same direction, and air ducts are formed in between two adjacent heat sinks. It is characterized in that:
- Each heat sink is bended into a wave shape and the wave-shaped heat sink has several peaks and several troughs in the lengthwise direction. The locations of peaks and troughs in two adjacent heat sinks are aligned. In any heat sink, there is at least one peak located in a triangular zone, which is enclosed by the corresponding peak on the heat sink above and the two troughs on the two sides of that peak on that same heat sink.

A fan is also arranged on the scroll compressor, and the air flow generated by the fan, as well as the natural wind, can blow the sides of the disk body. The air flow blows in one end of the air duct, and out of the other end. During the process the air flow passing through the air duct, the heat on the disk body and the heat sinks can be taken away, and hence the temperature will be reduced. Also, reducing the temperature of the disk body helps prevent the disk body from deforming because of high temperature. The heat sinks on the present disk body are wave-shaped. Wave-shaped heat sinks have peaks and troughs. The extending direction of the heat sinks is the transversal direction, and the arranging direction of several heat sinks is the longitudinal direction. Among them, the longer heat sinks can reinforce the strength of the disk body in the transversal direction. Since the heat sinks are wave-shaped, heat sinks between peaks and troughs can extend in the longitudinal direction to some extent. Therefore, heat sinks can reinforce the strength of the disk body in the longitudinal direction. Furthermore, since the locations of peaks and troughs in two adjacent heat sinks are aligned. In any heat sink, there is at least one peak located in a triangular zone, which is enclosed by the corresponding peak on the heat sink above and the two troughs on the two sides of that peak on that same heat sink. Therefore, in one transversal section, there are several heat sinks to reinforce the strength of the disk body. The stiffening effect is significant, so as to prevent the disk body from deforming. When the disk body is placed upside down, the previous peaks turn into troughs, while previous troughs turn into peaks. Namely, there is at least one trough located in a triangular zone, which is enclosed by the corresponding trough on the heat sink below and the two peaks on the two sides of that trough on that same heat sink.
In one embodiment of the scroll disk heat dissipation assembly of scroll compressors, there is the first prop, which is columnar and perpendicular to the back of the disk body, in the peak or trough area of the heat sink, and the outer diameter of the first prop is greater than the thickness of the heat sink. The first prop is arranged at the peaks or the troughs, and thus stiffens the heat sinks and the disk body. The top end of the first prop is flush with the top edge of the heat sinks, achieving a better coherence.
In one embodiment of the scroll disk heat dissipation assembly of scroll compressors, on the back of the disk body, there are three columnar second props perpendicular to it. The second props are located in the heat sinks and lines connecting the three second props form an isosceles triangle or equilateral triangle. The outer diameter of the second prop is greater than that of the first prop. Three second props are arranged in a triangular manner, play the role of supporting framer, and thus stiffen the disk body.
In one embodiment of the scroll disk heat dissipation assembly of scroll compressors, the thickness of the heat sink gradually increases from the top to the bottom. The bottom of the heat sink is thicker, hence, the connection strength with the disk body is higher, and the effect of stiffening the disk body is better. The top of the heat sink is thinner, which is easy for air to pass through the air duct.
In one embodiment of the scroll disk heat dissipation assembly of scroll compressors, there is a flat and straight inlet part on one end of the heat sink, and a flat and straight outlet part on the other end. The inlet part and the outlet part on one heat sink are arranged symmetrically. An air inlet connected to the air duct is formed in between the inlet parts of two adjacent heat sinks, and an air outlet connected to the air duct is formed in between the outlet parts of two adjacent heat sinks. The inlet part and the outlet part are on the same line, the several air inlets have the same orientation, and the widths are also roughly the same. This allows the air flow to enter into the air duct uniformly, so as to take away the heat from the heat sink disk uniformly.
In one embodiment of the scroll disk heat dissipation assembly of scroll compressors, there is the annular first stiffener circumferentially on the rim of the back of the disk body, and there are several long stripped second stiffeners on the back of the disk body as well. These second stiffeners are arranged in parallel, and the lengthwise direction of the second stiffeners is perpendicular to the lengthwise direction of the inlet part. The two ends of the several second stiffeners extend to the first stiffener respectively. The first stiffener can stiffen the outer rim of the disk body, and prevents the rim of the disk body from deforming. The second stiffener passes through peaks and troughs of the heat sink respectively, and hence intersects with the heat sink. Namely, the lengthwise direction of stiffeners is the same as the longitudinal direction of the disk body, and thus stiffens the disk body in the longitudinal direction.
In one embodiment of the scroll disk heat dissipation assembly of scroll compressors, the segment between the peak and the trough is straight, and the angle between the lines connecting the peak and its two adjacent troughs is 60°-120°.The direction of the straight line between the peak and the trough is inclined relative to the transversal direction of the disk body, to stiffen the disk body in the longitudinal direction. The angle between the lines connecting the peak and its two adjacent troughs determines the bending degree of the wave-shaped heat sink. When this angle is too big, the stiffening segment has a less inclination degree, and the stiffening effect is not significant. However, when the angle is too small, the resistive force against the air flow is also big. This is bad for the air flow to pass through, and hence lowers the heat dissipation effect. For this reason, by comprehensively considering the stiffening effect and the heat dissipation effect of the disk body, the angle between the lines connecting the peak and its two adjacent troughs is 60°-120°.
Compared to the prior art, one embodiment of the present scroll disk heat dissipation assembly of scroll compressors has the following advantages:

1. Since longer heat sinks can reinforce the strength of the disk body in the transversal direction, and the heat sink segment between peaks and troughs is arranged in an inclined or curved manner, the inclined or curved segment of the heat sink can reinforce the strength of the disk body in the longitudinal direction of the disk body.
2. Since the peak of the heat sink and its two adjacent troughs enclose a zone, and the zone is triangular. The peak of the heat sink extends into the corresponding zone of the adjacent heat sink. Therefore, in one transversal section, there are several heat sinks to reinforce the strength of the disk body. The stiffening effect is significant, so as to prevent the disk body from deforming.

BRIEF DESCRIPTION OF THE DRAWINGS

Fig. 1 is a perspective schematic view of one embodiment of the scroll disk.
Fig. 2 is a rear schematic view of one embodiment of the scroll disk.

DETAILED DESCRIPTION OF THE INVENTION

The embodiments of this invention will be described below and the technical solutions of the invention will be further illustrated in connection with the accompanying figures. However, the present invention shall not be limited to these embodiments.
As shown in Figure 1 and 2, one embodiment of a scroll disk heat dissipation assembly of scroll compressors, its scroll disk comprises the disk body 1, and the scroll is arranged on the front face of the disk body 1 in a spiral manner. The heat dissipation assembly comprises several long stripped heat sinks 2 on the back of the disk body 1, and the widthwise direction of the heat sink 2 is perpendicular to the back of the disk body 1. These heat sinks 2 are arranged in the same direction, and air ducts 3 are formed in between two adjacent heat sinks 2. Both ends of the heat sink 2 extend to the outer rim of the disk body 1. There is a flat and straight inlet part 26 on one end of the heat sink 2, and a flat and straight outlet part 27 on the other end. The inlet part 26 and the outlet part 27 on one heat sink 2 are arranged symmetrically. An air inlet 31 connected to the air duct 3 is formed in between the inlet parts 26 of two adjacent heat sinks 2, and an air outlet 32 connected to the air duct 3 is formed in between the outlet parts 27 of two adjacent heat sinks 2.A fan is also arranged on the scroll compressor, and the air flow generated by the fan, as well as the natural wind, can blow the sides of the disk body 1. The air flow blows in one end of the air duct 3, and out of the other end. During the process the air flow passing through the air duct 3, the heat on the disk body 1 and the heat sinks 2 can be taken away, and hence the temperature will be reduced. Also, reducing the temperature of the disk body 1 helps prevent the disk body 1 from deforming because of high temperature.
The thickness of the heat sink 2 gradually increases from the top to the bottom. The lines between the peak 22 of the heat sink 2 and its two adjacent troughs 23 are straight, and there is an angle between the lines connecting the peak 22 and its two adjacent troughs 23. This angle determines the bending degree of the wave-shaped heat sink 2. When this angle is too big, the stiffening effect is not significant. However, when the angle is too small, the resistive force against the air flow is also big. This is bad for the air flow to pass through. When the angle is 90°, the heat dissipation effect and stiffening effect of the disk body 1 is fairly good. The wave-shaped heat sink 2 has several peaks 22 and several troughs 23 in the lengthwise direction. The extending direction of the heat sinks 2 is in the transversal direction, and the arranging direction of several heat sinks 2 is in the longitudinal direction. Among them, the longer heat sinks 2 can reinforce the strength of the disk body 1 in the transversal direction. The direction of the line connecting the peak 22 and the adjacent trough 23 is inclined relative to the transversal direction of the disk body 1, to stiffen the disk body 1 in the longitudinal direction. The locations of peaks 22 and troughs 23 in two adjacent heat sinks 2 are aligned. In any heat sink 2, there is at least one peak 22 located in a triangular zone 6, which is enclosed by the corresponding peak 22 on the heat sink 2 above and the two troughs 23 on the two sides of that peak on that same heat sink. Therefore, in one transversal section, there are several heat sinks 2 to reinforce the strength of the disk body 1. The stiffening effect is significant, so as to prevent the disk body 1 from deforming.
The heat sink 2 has the first prop 24, which is columnar and perpendicular to the back of the disk body 1, the first prop 24 is in either the peak 22 or the trough 23 area. The outer diameter of the first prop 24 is greater than the thickness of the heat sink 2, and the outer diameter of the first prop 24 gradually increases from the top to the bottom. The top end of the first prop 24 is flush with the top edge of the heat sinks 2, stiffening the heat sinks 2 and the disk body 1.On the back of the disk body 1, there are three columnar second props 25 perpendicular to it. The second props 25 are located in the heat sinks 2. Similarly, the outer diameter of the second prop 25 also increases from the top to the bottom, and the outer diameter of the second prop 25 is greater than the outer diameter of the first prop 24. Lines connecting the three second props 25 form a triangle, and thus play the role of supporting framer for the disk body 1. In this embodiment, lines connecting the three second props 25 form an equilateral triangle, achieving a uniform stiffening effect of the disk body 1.There is the annular first stiffener 4 circumferentially on the rim of the back of the disk body 1. The first stiffener 4 can stiffen the outer rim of the disk body 1, and prevents the rim of the disk body 1 from deforming. There are several long stripped second stiffeners 5 on the back of the disk body 1 as well. These second stiffeners 5 are arranged in parallel, and the lengthwise direction of the second stiffeners 5 is perpendicular to the lengthwise direction of the inlet part 26. The two ends of the several second stiffeners 5 extend to the first stiffener 4 respectively. The second stiffener 5 passes through peaks 22 and troughs 23 of the heat sink 2 respectively, and hence intersects with the heat sink 2. Namely, the lengthwise direction of stiffeners is the same as the longitudinal direction of the disk body 1, and thus stiffens the disk body 1 in the longitudinal direction.
The description of the preferred embodiments thereof serves only as an illustration of the scope of the invention. It will be understood by those skilled in the art that various changes or supplements in form and details may be made therein without departing from the scope of the invention as defined by the appended claims.
Although the terms Disk Body 1, Heat Sink 2, etc. are often used herein, they do not exclude the possibility of using any other terms. Using such terms is only to describe or explain the nature of the present invention more conveniently. Any additional restrictions are contrary to the spirit of the present invention.

List of Reference Numerals

1: Disk Body
2: Heat Sink
22: Peak
23: Trough
24: First Prop
25: Second Prop
26: Inlet Part
27: Outlet Part
3: Air Duct
31: Air Inlet
32: Air Outlet
4: First Stiffener
5: Second Stiffener
6: Zone

Claims

A scroll disk heat dissipation assembly of scroll compressors, comprising:
a disk body (1) of a scroll disk;

several long stripped heat sinks (2) on a back of the disk body (1), the heat sinks (2) arranged in a same direction; and

air ducts (3) are formed in between two adjacent heat sinks (2);

wherein each heat sink (2) is bent into a wave shape, the wave-shaped heat sinks (2) having several peaks (22) and several troughs (23) in a lengthwise direction;

wherein locations of the peaks (22) and troughs (23) in two adjacent heat sinks (2) are aligned; and

wherein in any heat sink (2), there is at least one corresponding peak (22) located in a triangular zone (6), which is enclosed by the corresponding peak (22) on the heat sink (2) above and the two troughs (23) on two sides of the corresponding peak (22).
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claim 1 wherein
there is a first prop (24), which is columnar and perpendicular to the back of the disk body (1);
wherein the first prop (24)is in the peak (22) or trough (23) area of the heat sink (2); and
wherein an outer diameter of the first prop (24) is greater than a thickness of the heat sink (2).
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claim 2 wherein
on the back of the disk body (1), there are three columnar second props (25) perpendicular to the back of the disk body (1);
wherein the second props (25) are located in the heat sinks (2); and
wherein lines connecting the three second props (25) form an isosceles triangle or equilateral triangle.
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claims 2 or 3 wherein
a thickness of the heat sink (2) gradually increases from top to bottom.
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claim 1 or 2 or 3 wherein
there is a flat and straight inlet part (26) on a first end of one heat sink (2), and a flat and straight outlet part (27) on a second end of the heat sink (2);
wherein the inlet part (26) and the outlet part (27) on one heat sink (2) are arranged symmetrically;
wherein an air inlet (31) connected to the air duct (3) is formed in between the inlet parts (26) of two adjacent heat sinks (2); and
wherein an air outlet (32) connected to the air duct (3) is formed in between the outlet parts (27) of two adjacent heat sinks (2).
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claims 2 or 3 wherein
there is an annular first stiffener (4) circumferentially on a rim of the back of the disk body (1);
wherein there are several long stripped second stiffeners (5) on the back of the disk body (1);
wherein the second stiffeners (5) are arranged in parallel, and a lengthwise direction of the second stiffeners (5) is perpendicular to a lengthwise direction of the inlet part (26); and
wherein two ends of the second stiffeners (5) extend to the first stiffener (4) respectively.
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claims 2 or 3 wherein
a segment between the peak (22) and the trough (23) is straight, and an angle between the lines connecting the peak (22) and its two adjacent troughs (23) is 60°-120°.
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claim 4 wherein
there is a flat and straight inlet part (26) on a first end of one heat sink (2), and a flat and straight outlet part (27) on a second end of the heat sink (2);
wherein the inlet part (26) and the outlet part (27) on one heat sink (2) are arranged symmetrically;
wherein an air inlet (31) connected to the air duct (3) is formed in between the inlet parts (26) of two adjacent heat sinks (2); and
wherein an air outlet (32) connected to the air duct (3) is formed in between the outlet parts (27) of two adjacent heat sinks (2).
The scroll disk heat dissipation assembly of scroll compressors as claimed in Claims 4 wherein
there is an annular first stiffener (4) circumferentially on a rim of the back of the disk body (1);
wherein there are several long stripped second stiffeners (5) on the back of the disk body (1);
wherein the second stiffeners (5) are arranged in parallel, and a lengthwise direction of the second stiffeners (5) is perpendicular to a lengthwise direction of the inlet part (26); and
wherein two ends of the second stiffeners (5) extend to the first stiffener (4) respectively.