Oil-free screw refrigerator
By designing a constant temperature chamber shell and cooling pipe group in an oil-free screw freezer, the continuous cooling of the screw is achieved, and the problem of overheating of traditional freezers is solved, which extends the service life and improves energy efficiency.
Patent Information
- Application Number
- CN202421322731.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-06-12
- Publication Date
- 2025-02-18
- Estimated Expiration
- 2034-06-12
AI Technical Summary
Traditional oil-free screw freezers are prone to overheating problems during high-speed rotation, and traditional fitted heat tracing cooling methods cannot effectively solve the needs of compression and refrigeration.
An oil-free screw freezer is designed, using a constant temperature chamber shell and a cooling tube group, and the continuous cooling of the screw is achieved by spraying low-temperature liquid in the annular constant temperature chamber to ensure efficient heat exchange.
It effectively avoids thermal expansion and thermal stress problems of parts caused by excessive temperatures, extends the service life of the compressor, reduces energy consumption in low-temperature environments, and improves energy utilization efficiency.
Smart Images
Figure CN222504389U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of screw compressor refrigeration, in particular to an oil-free screw refrigerator. Background Art
[0002] Oil-free screw freezer is an advanced refrigeration equipment, its working principle is based on screw compression technology. During the refrigeration process, the screw sucks in gas when it rotates, and then gradually compresses the gas through further rotation of the screw, and finally discharges the compressed gas.
[0003] Since the refrigeration compressor uses a high-speed rotating screw and has many components, overheating may occur during the high friction process, and the traditional contact type heating for cooling cannot meet the needs of compression refrigeration. Therefore, those skilled in the art provide an oil-free screw refrigerator to solve the problems raised in the above background technology. Utility Model Content
[0004] In order to solve the above technical problems, the utility model provides an oil-free screw refrigerator, comprising an inner driving machine, a packaging cover and a refrigeration compressor body, wherein a compression chamber is provided in the refrigeration compressor body, a constant temperature chamber shell is provided in the middle of the compression chamber, the constant temperature chamber shell is fixedly installed on the right inner wall of the refrigeration compressor body, an annular constant temperature chamber is formed between the constant temperature chamber shell and the right inner wall of the refrigeration compressor body, and a cooling pipe group is arranged in the constant temperature chamber;
[0005] The cooling pipe group includes a liquid inlet pipe, an arc-shaped inlet pipe, a straight pipe and a U-shaped arc pipe. The middle part of the straight pipe is connected with the arc-shaped inlet pipe. The front end of the arc-shaped inlet pipe passes through the constant temperature cavity shell and the refrigeration compressor body and is fixedly connected with the liquid inlet pipe. The left and right ends of the straight pipe are connected with the U-shaped arc pipe. A plurality of spray ports are opened at the upper end of the U-shaped arc pipe. The liquid is circulated and injected into the straight pipe through the arc-shaped inlet pipe through the liquid inlet pipe. The U-shaped arc pipe is used to spray the inner wall of the constant temperature cavity with low-temperature liquid, and the liquid flows on the annular constant temperature cavity shell. The friction between the screw and the outer wall of the constant temperature cavity is heated up continuously to ensure an efficient cooling effect.
[0006] Preferably: the packaging cover is fixed by bolts on the left side of the refrigeration compressor body.
[0007] Preferably, the right side of the refrigeration compressor body is connected to an inner driving machine, a screw is fixedly installed in the middle of the left end of the inner driving machine, and the screw is located in the middle of the inner side of the constant temperature chamber shell.
[0008] Preferably, a liquid outlet is provided on the top surface of the upper end of the refrigeration compressor body, and the liquid outlet is connected to the constant temperature chamber, so that the circulating liquid sprayed by the cooling pipe group can be extracted and discharged.
[0009] Preferably, an air inlet is fixedly installed on the left side of the bottom of the compression chamber, and an air outlet is fixedly installed on the right side of the bottom of the compression chamber.
[0010] Preferably, a straight-through pipe is fixedly installed on the top of the constant temperature chamber, and the straight-through pipe is connected to the arc-shaped inlet pipe.
[0011] Technical effects and advantages of the utility model:
[0012] When the utility model is in use, the cooling liquid is fed into the liquid inlet pipe by an external circulation pump, and then enters the straight pipe through the arc inlet pipe to be divided into multiple U-shaped arc tubes, and finally sprayed to the inner wall of the constant temperature chamber through the spray port on the U-shaped arc tube for heat exchange, thereby ensuring the working efficiency and performance of the compressor screw and ensuring that the compressor operates at an optimal working temperature. Compared with traditional cooling air cooling or immersion cooling, the heat exchange rate and effect are guaranteed, and the problems of thermal expansion and thermal stress of the internal parts of the compressor caused by excessively high temperature are prevented, thereby accelerating the wear and aging thereof, helping to extend the service life of the compressor, and reducing the energy consumption of the compressor in a low-temperature constant temperature environment, thereby improving the energy utilization efficiency thereof. BRIEF DESCRIPTION OF THE DRAWINGS
[0013] Figure 1 It is a schematic diagram of the structure provided by this application;
[0014] Figure 2 It is a structural schematic diagram of a refrigeration compressor body provided by the present application;
[0015] Figure 3 It is a structural schematic diagram of the cooling tube group provided by the present application;
[0016] In the figure: 1, internal driving machine; 2, packaging cover; 3, refrigeration compressor body; 4, screw; 5, compression chamber; 6, constant temperature chamber; 7, liquid outlet; 8, constant temperature chamber shell; 9, air inlet; 10, air outlet; 11, cooling tube group;
[0017] 111. Liquid inlet pipe; 112. Arc-shaped inlet pipe; 113. Straight-through pipe; 114. U-shaped arc pipe. DETAILED DESCRIPTION
[0018] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments. The embodiments of the present invention are provided for the purpose of illustration and description, and are not intended to be exhaustive or to limit the present invention to the disclosed forms. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and design various embodiments with various modifications suitable for specific purposes.
[0019] See also Figures 1 to 3 In this embodiment, an oil-free screw refrigerator is provided, including an inner driving machine 1, a packaging cover 2 and a refrigeration compressor body 3, the packaging cover 2 is fixed by bolts on the left side of the refrigeration compressor body 3, the right side of the refrigeration compressor body 3 is connected to the inner driving machine 1, a compression chamber 5 is provided in the refrigeration compressor body 3, a constant temperature chamber shell 8 is provided in the middle of the compression chamber 5, the constant temperature chamber shell 8 is fixedly installed on the right inner wall of the refrigeration compressor body 3, an annular constant temperature chamber 6 is formed between the constant temperature chamber shell 8 and the right inner wall of the refrigeration compressor body 3, a cooling pipe group 11 is arranged in the constant temperature chamber 6, a liquid outlet 7 is provided on the top surface of the upper end of the refrigeration compressor body 3, the liquid outlet 7 is connected to the constant temperature chamber 6, so that the circulating liquid sprayed by the cooling pipe group 11 is extracted and discharged, a screw 4 is fixedly installed in the middle of the left end of the inner driving machine 1, and the screw 4 is located in the middle of the inner side of the constant temperature chamber shell 8, an air inlet 9 is fixedly installed on the left side of the cavity bottom of the compression chamber 5, and an air outlet 10 is fixedly installed on the right side of the cavity bottom of the compression chamber 5;
[0020] The cooling pipe group 11 includes a liquid inlet pipe 111, an arc-shaped inlet pipe 112, a straight pipe 113 and a U-shaped arc pipe 114. The straight pipe 113 is fixedly installed on the top of the constant temperature chamber 6. The middle part of the straight pipe 113 is connected with the arc-shaped inlet pipe 112. The front end of the arc-shaped inlet pipe 112 passes through the constant temperature chamber shell 8 and the refrigeration compressor body 3 and is fixedly connected with the liquid inlet pipe 111. The left and right ends of the straight pipe 113 are connected with the U-shaped arc pipe 114. The upper end of the U-shaped arc pipe 114 is provided with a plurality of spray ports. The liquid is circulated and injected into the straight pipe 113 through the arc-shaped inlet pipe 112 through the liquid inlet pipe 111. The U-shaped arc pipe 114 sprays the inner wall of the constant temperature chamber 6 with low-temperature liquid, and flows on the annular constant temperature chamber shell 8. The friction between the screw 4 and the outer wall of the constant temperature chamber 6 is heated and continuously cooled, thereby ensuring an efficient cooling effect.
[0021] The working principle of the utility model is:
[0022] When the utility model is in use, the internal driving machine 1 drives the screw 4 to make high-speed friction contact with the inner shell wall of the constant temperature chamber shell 8, the air inlet 9 continuously intakes air into the compression chamber 5, and the compressed gas is discharged from the air outlet 10. At this time, the cooling liquid is fed into the liquid inlet pipe 111 by an external circulating pump, and enters the straight pipe 113 through the arc inlet pipe 112, and is divided by multiple U-shaped arc tubes 114, and finally sprayed to the inner wall of the constant temperature chamber 6 through the spray port on the U-shaped arc tube 114 for heat exchange, thereby ensuring the working efficiency and performance of the compressor screw 4, ensuring that the compressor operates at the optimal working temperature, and compared with traditional cooling air cooling or immersion cooling, the heat exchange rate and effect are guaranteed, and the excessive temperature is prevented from causing thermal expansion, thermal stress and other problems in the internal parts of the compressor, thereby accelerating their wear and aging, helping to extend the service life of the compressor, and reducing the energy consumption of the compressor in a low temperature constant temperature environment, and improving its energy utilization efficiency.
[0023] Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field and related fields without creative work should fall within the scope of protection of the present invention. Structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to conventional means in the field unless otherwise specified and limited.
Claims
1. An oil-free screw refrigerator, comprising an inner driving machine (1), a packaging cover (2) and a refrigeration compressor body (3), characterized in that: The refrigeration compressor body (3) has a compression chamber (5) therein, a constant temperature chamber shell (8) is arranged in the middle of the compression chamber (5), the constant temperature chamber shell (8) is fixedly mounted on the right inner wall of the refrigeration compressor body (3), an annular constant temperature chamber (6) is formed between the constant temperature chamber shell (8) and the right inner wall of the refrigeration compressor body (3), and a cooling pipe group (11) is arranged in the constant temperature chamber (6); The cooling pipe group (11) comprises a liquid inlet pipe (111), an arc-shaped inlet pipe (112), a straight pipe (113) and a U-shaped arc pipe (114); the middle of the straight pipe (113) is connected to the arc-shaped inlet pipe (112); the front end of the arc-shaped inlet pipe (112) passes through the constant temperature chamber shell (8) and the refrigeration compressor body (3) and then is fixedly connected to the liquid inlet pipe (111); the left and right ends of the straight pipe (113) are connected to the U-shaped arc pipe (114); and the upper end of the U-shaped arc pipe (114) is provided with a plurality of spray ports.
2. The oil-free screw refrigerator according to claim 1, characterized in that: The left side of the refrigeration compressor body (3) is bolted to fix the packaging cover (2).
3. The oil-free screw refrigerator according to claim 2, characterized in that: The right side of the refrigeration compressor body (3) is connected to the inner driving machine (1), and a screw rod (4) is fixedly installed in the middle of the left end of the inner driving machine (1), and the screw rod (4) is located in the middle of the inner side of the constant temperature chamber shell (8).
4. The oil-free screw refrigerator according to claim 3, characterized in that: The top surface of the upper end of the refrigeration compressor body (3) is provided with a liquid outlet (7), and the liquid outlet (7) is communicated with the constant temperature chamber (6).
5. The oil-free screw refrigerator according to claim 1, characterized in that: An air inlet (9) is fixedly installed on the left side of the bottom of the compression chamber (5), and an air outlet (10) is fixedly installed on the right side of the bottom of the compression chamber (5).
6. The oil-free screw refrigerator according to claim 1, characterized in that: A straight-through pipe (113) is fixedly installed at the top of the constant temperature chamber (6), and the straight-through pipe (113) is connected to the arc-shaped inlet pipe (112).