Air-cooled cold water screw unit

Abstract

The utility model relates to the field of refrigeration screw units, and discloses an air-cooled cold water screw unit which comprises a compressor, the compressor is communicated with a heat exchanger and used for conveying refrigerants to the heat exchanger, the heat exchanger is communicated with an economizer through a first valve body, a filter and a second valve body in sequence, and the economizer is communicated with a water tank through a throttling valve. A water path capable of exchanging heat with the refrigerant is arranged in the water tank, and the water tank is communicated with the compressor; one end of the bypass pipeline is communicated with a pipeline between the compressor and the heat exchanger, and the other end of the bypass pipeline is communicated with a pipeline between the throttle valve and the water tank. Oil in the system can be accumulated and solidified in the coldest place of the system, part of high-temperature gas in a pipeline between a throttling valve and a water tank is discharged into a heat exchanger through an opened valve body, lubricating oil solidified on the heat exchanger is heated to become liquid, and the liquid flows back to a compressor again. And the risk that the compressor is abraded and burnt out due to the lack of lubricating oil is avoided.

Description

Technical Field

[0001] The utility model belongs to the field of refrigeration screw units, in particular to an air-cooled cold water screw unit. Background Art

[0002] For screw compressors, long-term continuous use will cause the lubricating oil in the compressor to be lost. The lubricating oil in the system will accumulate and solidify in the coldest place in the system and cannot flow back to the compressor, causing the risk of compressor wear and burning. Utility Model Content

[0003] In view of the problems existing in the prior art, the utility model provides an air-cooled water-cooling screw unit which can overcome the above problems or at least partially solve the above problems.

[0004] The utility model is implemented as follows: an air-cooled chilled water screw unit includes a compressor, the compressor is connected to a heat exchanger and is used to transport refrigerant to the heat exchanger, the heat exchanger is connected to an economizer through a first valve body, a filter, and a second valve body in sequence, the economizer is connected to a water tank through a throttle valve, the water tank is provided with a water path that can exchange heat with the refrigerant, the water tank is connected to the compressor; and also includes a bypass pipeline, one end of the bypass pipeline is connected to the pipeline between the compressor and the heat exchanger, and the other end of the bypass pipeline is connected to the pipeline connected to the throttle valve and the water tank.

[0005] As a preferred technical solution, it also includes a bypass valve body, one end of which is connected to the pipeline between the heat exchanger and the first valve body, and one end of which is connected to the pipeline between the valve body and the economizer.

[0006] The water tank includes a heat exchange tube and a cleaning component, the heat exchange tube includes a bottom plate, two brackets and a tube body, the bottoms of the two brackets are fixedly connected to the left and right sides of the top of the bottom plate respectively, the left and right sides of the surface of the tube body are fixedly connected to the inside of the two brackets, the cleaning component is located on the surface of the tube body, the cleaning component includes two moving blocks, a plurality of brushes, a connecting block, two control blocks and a fixed plate, a plurality of the brushes are fixed to the opposite ends of the two moving blocks and are evenly distributed, a plurality of the brushes are slidably connected to the surface of the tube body on one side, the top of the connecting block is fixedly connected to the bottom of the bottom moving block, the surfaces of the two control blocks can be slidably connected to the front and rear sides of the connecting block respectively, and can be fixedly connected by bolts, the front and rear sides of the fixed plate are fixedly connected to the bottoms of the opposite ends of the two control blocks respectively; the cleaning component is used to clean dust on the surface of the tube body.

[0007] In order to automatically clean the surface of the tube body, preferably, a transmission assembly is provided at the bottom of the fixed plate, and the transmission assembly includes a motor, a screw and a transmission block. The bottom of the motor is fixedly connected to the left side of the top of the base plate, the left side of the screw is fixedly connected to the right side of the motor output end, the interior of the transmission block is threadedly connected to the surface of the screw, the top of the transmission block is fixedly connected to the bottom of the fixed plate, and the right side of the screw surface is movably connected to the inside of the right bracket. Through the transmission assembly, the motor makes the forward and reverse rotation of the screw, which will move the transmission block to the left or right. The movement of the transmission block will cause the fixed plate, two control blocks, the connecting block and the two moving blocks to move to the left or right. The two moving blocks will drive multiple brushes to move left or right, thereby automatically cleaning the surface of the tube body.

[0008] In order to protect the screw, preferably, a protective block is fixedly connected to the right side of the motor, the surface of the protective block is slidably connected to the inside of the transmission block, and the right side of the protective block is fixedly connected to the left side of the right bracket. The protective block can prevent the screw from being damaged by collision, thereby improving the use effect of the screw.

[0009] In order to make the movement effect of the cleaning component better, preferably, the two control blocks are fixedly connected to the inside with sliders, the two sliders are slidably connected to the inside with round rods, the left and right sides of the two round rods are fixedly connected with card blocks, and the four card blocks are respectively fixed to the front and rear sides of the two brackets. Through the two sliders, two round rods and four card blocks, a limiting effect is played, so that the two control blocks, the fixed plate, the connecting block, the two movable blocks and the multiple brushes can only move to the left or right.

[0010] In order to further improve the cleaning effect on the surface of the tube body, preferably, the left sides of the two moving blocks are fixedly connected with mounting blocks, the insides of the two mounting blocks are fixedly connected with cleaning cloths, and the opposite ends of the two cleaning cloths are slidably connected to the surface of the tube body. Through the two mounting blocks and the two cleaning cloths, the two moving blocks will drive the two mounting blocks and the two cleaning cloths to move during the movement, so that the two cleaning cloths can clean the surface of the tube body.

[0011] In order to enable the two moving blocks to be fixed to or separated from each other, preferably, the front and rear sides of the moving block at the top are fixedly connected with plug-in blocks, and the front and rear sides of the moving block at the bottom are fixedly connected with sockets. The surfaces of the two plug-in blocks are plug-connected to the insides of the two sockets and can be fixedly connected by bolts. Through the two plug-in blocks and the two sockets, the two plug-in blocks can be plug-connected to the two sockets. By fixing with bolts, the two moving blocks can be fixed to each other. By removing the bolts, the two moving blocks can be separated from each other.

[0012] In order to be able to remove the bottom movable block, preferably, movable grooves are opened inside the two control blocks, and the interiors of the two movable grooves are slidingly connected to the front and rear sides of the connecting block respectively. Through the two movable grooves, the bolts fixing the two control blocks and the connecting block are removed, so that the movable block can be moved to the bottom of the two movable grooves and moved to the right, thereby realizing the removal of the bottom movable block.

[0013] Compared with the prior art, the beneficial effects of the utility model are as follows:

[0014] The oil in the system will accumulate and solidify in the coldest place in the system. Through the open valve body, a part of the high-temperature gas in the pipeline between the throttle valve and the water tank is discharged to the heat exchanger, and the lubricating oil solidified on the heat exchanger is heated and turned back into liquid, and then flows back to the compressor, ensuring that the lubricating oil of the compressor will not be lost and cause the risk of wear and burning of the compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a piping diagram of the air-cooled water-cooling screw unit of the utility model;

[0016] Figure 2 It is a schematic diagram of the three-dimensional structure of the heat exchanger provided by the embodiment of the utility model;

[0017] Figure 3 The embodiment of the utility model provides a transmission assembly;

[0018] Figure 4 It is a detailed stereogram of a local structure provided by an embodiment of the utility model;

[0019] Figure 5 It is a three-dimensional structural diagram of two separated moving blocks provided by an embodiment of the utility model;

[0020] Figure 6 It is a three-dimensional structural diagram of a transmission assembly provided in an embodiment of the utility model.

[0021] In the figure: 1. heat exchange tube; 1a. bottom plate; 1b. bracket; 1c. tube body; 2. cleaning assembly; 2a. moving block; 2b. brush; 2c. connecting block; 2d. control block; 2e. fixing plate; 3. transmission assembly; 301. motor; 302. screw; 303. transmission block; 4. protective block; 5. slider; 6. round rod; 7. clamping block; 8. mounting block; 9. cleaning cloth; 10. plug-in block; 11. socket; 12. moving slot; 13. compressor; 14. heat exchanger; 15. first valve body; 16. filter; 17. second valve body; 18. bypass valve body; 19. economizer; 20. throttle valve; 21. water tank; 22. bypass pipeline. DETAILED DESCRIPTION

[0022] In order to further understand the content, features and effects of the present invention, the following embodiments are given as examples and described in detail with reference to the accompanying drawings.

[0023] The structure of the utility model is described in detail below in conjunction with the accompanying drawings.

[0024] like Figures 2 to 6As shown, an air-cooled water-cooling screw unit provided by an embodiment of the utility model includes a heat exchange tube 1 and a cleaning component 2. The heat exchange tube 1 includes a bottom plate 1a, two brackets 1b and a tube body 1c. The bottoms of the two brackets 1b are fixedly connected to the left and right sides of the top of the bottom plate 1a respectively, and the left and right sides of the surface of the tube body 1c are fixedly connected to the inside of the two brackets 1b. The cleaning component 2 is located on the surface of the tube body 1c. The cleaning component 2 includes two moving blocks 2a, a plurality of brushes 2b, a connecting block 2c, two control blocks 2d and a fixed plate 2e. The plurality of brushes 2b are fixed to the opposite ends of the two moving blocks 2a and are evenly distributed. The plurality of brushes 2b are slidably connected to the surface of the tube body 1c on one side close to the tube body 1c, and the top of the connecting block 2c is connected to the bottom of the bottom moving block 2a. The surfaces of the two control blocks 2d can be slidably connected to the front and rear sides of the connecting block 2c respectively, and can be fixedly connected by bolts. The front and rear sides of the fixing plate 2e are fixedly connected to the bottoms of the opposite ends of the two control blocks 2d respectively; the cleaning component 2 is used to clean the dust on the surface of the tube body 1c. In order to automatically clean the surface of the tube body 1c, a transmission component 3 is provided at the bottom of the fixing plate 2e. The transmission component 3 includes a motor 301, a screw 302 and a transmission block 303. The bottom of the motor 301 is fixedly connected to the left side of the top of the bottom plate 1a, the left side of the screw 302 is fixedly connected to the right side of the output end of the motor 301, the interior of the transmission block 303 is threadedly connected to the surface of the screw 302, and the top of the transmission block 303 is fixed to the bottom of the fixing plate 2e The right side of the surface of the screw rod 302 is movably connected with the inside of the right bracket 1b. Through the transmission assembly 3, the motor 301 makes the screw rod 302 rotate forward and reverse, which will make the transmission block 303 move left or right. The movement of the transmission block 303 will make the fixed plate 2e, the two control blocks 2d, the connecting block 2c and the two moving blocks 2a move left or right. The two moving blocks 2a will drive multiple brushes 2b to move left or right, thereby automatically cleaning the surface of the tube body 1c. In order to protect the screw rod 302, a protective block 4 is fixedly connected to the right side of the motor 301. The surface of the protective block 4 is slidably connected to the inside of the transmission block 303. The right side of the protective block 4 is fixedly connected to the left side of the right bracket 1b. Through the protective block 4, the screw rod 302 can be prevented from being hit and causing In order to improve the use effect of the screw 302, in order to make the moving effect of the cleaning component 2 better, the two control blocks 2d are fixedly connected with sliders 5 inside, the two sliders 5 are slidably connected with round rods 6 inside, the left and right sides of the two round rods 6 are fixedly connected with card blocks 7, and the four card blocks 7 are respectively fixed to the front and rear sides of the two brackets 1b. Through the two sliders 5, the two round rods 6 and the four card blocks 7, a limiting effect is played, so that the two control blocks 2d, the fixed plate 2e, the connecting block 2c, the two moving blocks 2a and the multiple brushes 2b can only move to the left or right. In order to further improve the cleaning effect on the surface of the tube body 1c, the left sides of the two moving blocks 2a are fixedly connected with mounting blocks 8, and the insides of the two mounting blocks 8 are fixedly connected with cleaning cloths 9.The opposite ends of the two cleaning cloths 9 are slidably connected to the surface of the tube body 1c. Through the two mounting blocks 8 and the two cleaning cloths 9, the two moving blocks 2a will drive the two mounting blocks 8 and the two cleaning cloths 9 to move during the movement, so that the two cleaning cloths 9 can clean the surface of the tube body 1c. In order to enable the two moving blocks 2a to be fixed or separated from each other, the front and rear sides of the top moving block 2a are fixedly connected with plug-in blocks 10, and the front and rear sides of the bottom moving block 2a are fixedly connected with sockets 11. The surfaces of the two plug-in blocks 10 are plug-in connected to the inside of the two sockets 11, and can be fixedly connected by bolts. and two sockets 11, the two plug-in blocks 10 can be plugged and connected with the two sockets 11, and the two moving blocks 2a can be fixed to each other by bolts. The two moving blocks 2a can be separated from each other by removing the bolts. In order to remove the bottom moving block 2a, the two control blocks 2d are provided with moving grooves 12 inside. The insides of the two moving grooves 12 are respectively slidably connected with the front and rear sides of the connecting block 2c. Through the two moving grooves 12, after removing the bolts fixing the two control blocks 2d and the connecting block 2c, the moving block 2a can be moved to the bottom of the two moving grooves 12 and moved to the right, so that the bottom moving block 2a can be removed.

[0025] The working principle of this utility model:

[0026] like Figure 1 , the compressor 13 compresses the refrigerant into a high-temperature and high-pressure gas, and transports it to the heat exchanger 14 for heat exchange with the external environment temperature to turn the refrigerant into a medium-temperature and high-pressure liquid, and then flows through the first valve body 15, the filter 16, and the second valve body 17 to the economizer 19, and then flows to the throttle valve 20, turning the refrigerant into a low-temperature and low-pressure gas-liquid two-phase medium to separate and exchange heat with the water in the water tank 21. The refrigerant becomes a high-temperature and high-pressure gas and flows back to the compressor 13, forming a cycle. After testing, the oil in the system will accumulate and solidify in the coldest place in the system. By opening the valve body 10, a part of the high-temperature gas in the pipeline between the throttle valve 20 and the water tank 21 is discharged to the heat exchanger 14, and the lubricating oil solidified on the heat exchanger is heated and turned back into liquid, and then flows back to the compressor 13, which ensures that the lubricating oil of the compressor 13 will not be lost and cause the risk of wear and burning of the compressor 13.

[0027] A maintenance bypass valve body 18 is also added to the system. When the unit reaches the maintenance time and the unit is not allowed to stop running, by closing the first valve body 15 and the second valve body 17 and opening the valve body 6 for bypass, the maintenance personnel can operate to replace the filter element of the filter 16 for maintenance. After the maintenance is completed and the relevant vacuum treatment actions are performed, the first valve body 15 and the second valve body are reopened, and the bypass valve body 18 is closed, so that the unit can resume operation according to the original circulation route.

[0028] In a preferred embodiment, it further comprises a controller and an uninterruptible power supply which are electrically connected to each other, wherein the controller is electrically connected to the compressor, and the controller comprises a frequency converter and a filter.

[0029] The role of the frequency converter: It can adjust the speed of the motor according to actual needs, realize smooth acceleration, deceleration and braking processes, and improve production efficiency and equipment performance. By adjusting the working state of the motor, the frequency converter can effectively reduce energy consumption and reduce energy waste. For example, in the application of equipment such as fans and water pumps, the frequency converter can make it work in a higher efficiency range, thereby saving energy. The frequency converter has a variety of safety protection functions such as overload protection, overheating protection, and short-circuit protection, which effectively prevents the motor from being damaged due to overload, overheating, etc. The current when the motor starts is large, and the frequency converter can reduce the starting current to about three times the rated current, realizing the soft start of the motor and reducing the impact on the power grid.

[0030] Filter function:

[0031] In the inverter with AC power input, due to the nonlinear characteristics of current and voltage, the output signal contains a large number of high-order harmonics, which not only harm the electrical equipment, but also affect the quality of the power grid. The inverter filter can effectively remove the high-order harmonics output by the inverter through filtering. When the electrical equipment is working, it will generate a lot of noise interference, which will interfere with the surrounding environment and other electrical equipment, affecting the operation effect of the equipment. The filter can reduce these noise interferences, ensure the normal operation of the equipment, and avoid interference with other equipment and the surrounding environment. The filter can effectively protect the electrical equipment and prevent the equipment from being damaged by high-order harmonics and noise interference, thereby improving the operation stability and reliability of the electrical equipment.

[0032] UPS uninterruptible power supply function:

[0033] To ensure the quality of power, it can stabilize the voltage, filter noise, reduce interference, and provide stable power output to ensure the normal operation of the equipment. It can also be used as a backup power supply. In case of emergency such as power failure or power outage, the UPS uninterruptible power supply can provide temporary power supply to ensure the normal operation of the equipment. To improve the reliability of the equipment, it can provide a stable power supply to avoid equipment failure or shutdown caused by power problems. At the same time, the UPS uninterruptible power supply can also provide protection functions such as overload protection and short circuit protection, thereby further improving the reliability of the equipment. It has the function of energy saving and environmental protection. It can reduce energy waste and reduce operating costs through efficient energy conversion technology and intelligent energy management functions. At the same time, the UPS uninterruptible power supply can also realize the recycling and reuse of waste batteries, thereby achieving the goal of resource recycling and environmental protection.

[0034] When it is necessary to automatically clean the surface of the tube body 1c, the surface of the tube body 1c can be covered with a layer of anti-stick coating, and the motor 301 is operated to rotate the screw 302, and the rotation of the screw 302 causes the transmission block 303 to drive the fixed plate 2e, the two control blocks 2d, the connecting block 2c and the two moving blocks 2a to move to the right, and the movement of the two moving blocks 2a causes the multiple brushes 2b to move to the right, and drives the two mounting blocks 8 and the two cleaning cloths 9 to move to the right, and the motor 301 is used to rotate the screw 302 in the opposite direction, so that the transmission block 303 drives the two control blocks 2d, the connecting block 2c, the two moving blocks 2a, the multiple brushes 2b, the two The mounting blocks 8 and the two cleaning cloths 9 are moved to the left to clean the surface of the tube body 1c. When the two moving blocks 2a, the multiple brushes 2b, the two mounting blocks 8 and the two cleaning cloths 9 need to be removed for cleaning or replacement, the bolts fixing the two plug-in blocks 10 and the two sockets 11 are first removed, so that the top moving block 2a can be moved upward and disengaged from the bottom moving block 2a, and the bolts fixing the two control blocks 2d and the connecting block 2c are removed, so that the connecting block 2c can drive the bottom moving block 2a to move downward and move to the inside of the two moving grooves 12, and then move to the right to remove the bottom connecting block 2c.

[0035] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0036] The above description is only a preferred embodiment of the utility model, and does not constitute any form of limitation to the utility model. Although the utility model has been disclosed as a preferred embodiment as above, it is not used to limit the utility model. Any technician familiar with this patent will not depart from the scope of the technical solution of the utility model.

Claims

1. An air-cooled water-cooling screw unit, comprising a compressor (13), characterized in that: The compressor (13) is connected to the heat exchanger (14) and is used to transport refrigerant to the heat exchanger. The heat exchanger (14) is connected to the economizer (19) through the first valve body (15), the filter (16), and the second valve body (17) in sequence. The economizer (19) is connected to a water tank (21) through a throttle valve (20). The water tank (21) is provided with a water path capable of performing heat exchange with the refrigerant. The water tank (21) is connected to the compressor (13). It also includes a bypass pipeline (10), one end of which is connected to the pipeline between the compressor (13) and the heat exchanger (14), and the other end of which is connected to the pipeline between the throttle valve (20) and the water tank (21).

2. The air-cooled water-cooling screw unit according to claim 1, characterized in that: It also includes a bypass valve body (18), one end of which is connected to the pipeline between the heat exchanger (14) and the first valve body (15), and one end of which is connected to the pipeline between the valve body (5) and the economizer (19).

3. The air-cooled water-cooling screw unit according to claim 1, characterized in that: The water tank (21) comprises a heat exchange tube (1) and a cleaning component (2); the heat exchange tube (1) comprises a bottom plate (1a), two brackets (1b) and a tube body (1c); the bottoms of the two brackets (1b) are respectively fixedly connected to the left and right sides of the top of the bottom plate (1a); the left and right sides of the surface of the tube body (1c) are both fixedly connected to the inside of the two brackets (1b); the cleaning component (2) is located on the surface of the tube body (1c); the cleaning component (2) comprises two moving blocks (2a), a plurality of brushes (2b), a connecting block (2c), two control blocks (2d) and a fixing plate (2e); the plurality of brushes (2b) are connected to the two control blocks (2d) and a fixing plate (2e); The brushes (2b) are fixed to the opposite ends of the two moving blocks (2a) and are evenly distributed. The sides of the plurality of brushes (2b) close to the tube body (1c) are slidably connected to the surface of the tube body (1c). The top of the connecting block (2c) is fixedly connected to the bottom of the bottom moving block (2a). The surfaces of the two control blocks (2d) can be slidably connected to the front and rear sides of the connecting blocks (2c) respectively and can be fixedly connected by bolts. The front and rear sides of the fixing plate (2e) are fixedly connected to the bottoms of the opposite ends of the two control blocks (2d) respectively. The cleaning component (2) is used to clean dust on the surface of the tube body (1c).

4. The air-cooled water-cooling screw unit according to claim 3, characterized in that: A transmission assembly (3) is arranged at the bottom of the fixed plate (2e), and the transmission assembly (3) comprises a motor (301), a screw rod (302) and a transmission block (303); the bottom of the motor (301) is fixedly connected to the left side of the top of the bottom plate (1a); the left side of the screw rod (302) is fixedly connected to the right side of the output end of the motor (301); the interior of the transmission block (303) is threadedly connected to the surface of the screw rod (302); the top of the transmission block (303) is fixedly connected to the bottom of the fixed plate (2e); and the right side of the surface of the screw rod (302) is movably connected to the interior of the right bracket (1b).

5. The air-cooled water-cooling screw unit according to claim 4, characterized in that: A protection block (4) is fixedly connected to the right side of the motor (301), the surface of the protection block (4) is slidably connected to the inside of the transmission block (303), and the right side of the protection block (4) is fixedly connected to the left side of the right bracket (1b).

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