Falling film chiller

Abstract

The utility model discloses a falling film type water chiller, relate to water chiller technical field. The utility model discloses a rack, the fixed mounting of shell and tube type condenser is installed on the rack, and the fixed mounting of falling film type evaporator is installed on one side of shell and tube type condenser at the rack, the upper end fixed mounting of falling film type evaporator has the compressor, the upper end fixed mounting of shell and tube type condenser has the oil separator, one side fixed mounting of compressor has the electric control box, one end of shell and tube type condenser is equipped with cooling water import and cooling water export, one end of falling film type evaporator is equipped with refrigerated water import and refrigerated water export, be equipped with compressor suction port and compressor exhaust port on the compressor, be equipped with oil separator air inlet and oil separator exhaust on the oil separator. The utility model has the advantages of convenient to use, simple operation, high heat exchange efficiency, reliable and stable oil return, less filling volume than full -liquid type, save operating cost, has practicality and universality.

Description

Technical Field

[0001] This utility model relates to the field of chiller technology, specifically to a falling film chiller. Background Technology

[0002] A screw chiller is a positive displacement compressor with a screw compressor at its core, widely used in refrigeration, air compression, and other fields. Its core component is a pair of meshing male and female rotors. Through the periodic change in the volume between the rotor teeth during rotation, the three processes of intake, compression, and exhaust are continuously completed. Existing screw chillers use either dry-type or flooded-type evaporators. However, current dry-type evaporator screw chillers have low energy efficiency ratios, while flooded-type evaporators, although having higher energy efficiency ratios, suffer from poor oil return and require a large refrigerant charge. Therefore, a falling film chiller unit is proposed. Utility Model Content

[0003] The purpose of this utility model is to solve the problems of low energy efficiency ratio of dry evaporator screw chiller units and poor oil return and excessive refrigerant charge of flooded evaporators, which have high energy efficiency ratios. This utility model provides a falling film chiller unit.

[0004] To achieve the above objectives, this utility model specifically adopts the following technical solution: A falling film chiller unit includes a frame, on which a shell-and-tube condenser is fixedly mounted. A falling film evaporator is fixedly mounted on one side of the shell-and-tube condenser on the frame. A compressor is fixedly mounted on the upper end of the falling film evaporator. An oil separator is fixedly mounted on the upper end of the shell-and-tube condenser. An electrical control box is fixedly mounted on one side of the compressor. One end of the shell-and-tube condenser has a cooling water inlet and a cooling water outlet. One end of the falling film evaporator has a chilled water inlet and a chilled water outlet. The compressor has a compressor suction port and a compressor discharge port. The oil separator has an oil separator inlet and an oil separator discharge port, and the oil separator is connected to the shell-and-tube condenser. The compressor suction port is fixedly connected to... There are three return oil lines: return oil line 1, return oil line 2, and return oil line 4. Return oil line 1 is fixedly installed between the oil separator and the compressor. Return oil line 3 is fixedly installed between the shell-and-tube condenser and the compressor. Return oil line 2 and return oil line 4 are fixedly installed between the falling film evaporator and the compressor, and the falling film evaporator and the compressor are connected through return oil line 2 and return oil line 4. Return oil line 5 is provided between the shell-and-tube condenser and the falling film evaporator. An ejector pump is fixedly installed between return oil line 3 and return oil line 2, and return oil line 3 and return oil line 2 are connected through the ejector pump. A filling solenoid valve and a venting solenoid valve are fixedly installed on the side of the ejector pump on return oil line 2 and return oil line 3, respectively.

[0005] Preferably, a ball valve is fixedly installed on the first oil return line, and a filter is fixedly installed on the first oil return line on one side of the ball valve. A solenoid valve is fixedly installed on the first oil return line on one side of the filter, and a sight glass is fixedly installed on the first oil return line on one side of the solenoid valve.

[0006] Preferably, ball valves are fixedly installed on both the second and third oil return lines, and solenoid valves are fixedly installed on both the second and third oil return lines.

[0007] Preferably, a ball valve is installed on the return oil line four, a filter is fixedly installed on one side of the ball valve on the return oil line four, a one-way valve is fixedly installed on one side of the filter on the return oil line four, an ejector air pump is fixedly installed on one side of the one-way valve on the return oil line four, and a sight glass is fixedly installed on one side of the ejector air pump on the return oil line four.

[0008] Preferably, the return oil line five is configured as a refrigerant line five, and a refrigerant charging port is fixedly installed on the refrigerant line five; a ball valve is fixedly installed on the side of the refrigerant charging port on the refrigerant line five; a filter is fixedly installed on the side of the ball valve on the refrigerant line five; and an electronic expansion valve is fixedly installed on the side of the filter on the refrigerant line five.

[0009] Preferably, a liquid level sensor is installed on the falling film evaporator, and the liquid level sensor is fixedly embedded in the falling film evaporator.

[0010] The beneficial effects of this utility model are as follows: 1. In this utility model, through components such as an oil separator, a falling film evaporator, and an electronic expansion valve, the high-temperature and high-pressure gas discharged from the compressor enters the oil separator to separate some of the oil. Then, the refrigerant enters the shell-and-tube condenser to exchange heat with water to achieve cooling. The cooled refrigerant becomes a high-temperature and high-pressure liquid, which is throttled by the electronic expansion valve and enters the evaporator. After passing through the evaporator, it becomes a low-temperature and low-pressure gas and is drawn back by the compressor. This cycle is repeated continuously. It is convenient to use, simple to operate, has high heat exchange efficiency, reliable and stable oil return, and requires less charge than the flooded type, saving operating costs. It has practicality and wide applicability. Attached Figure Description

[0011] Figure 1 This is a front view schematic diagram of the overall three-dimensional connection structure of this utility model; Figure 2 This is a top view schematic diagram of the overall three-dimensional connection structure of this utility model; Figure 3 This is a schematic diagram of the equipment operation process of this utility model.

[0012] Reference numerals: 1. Compressor; 2. Oil separator; 3. Shell and tube condenser; 4. Falling film evaporator; 5. Sight glass; 6. Filter; 7. Ejector pump; 8. Check valve; 9. Exhaust solenoid valve; 10. Filling solenoid valve; 11. Electronic expansion valve; 12. Solenoid valve; 13. Liquid level sensor; 14. Frame; 15. Electrical control box; 16. Cooling water inlet; 17. Cooling water outlet; 18. Chilled water inlet; 19. Chilled water outlet; 20. Compressor suction port; 21. Compressor discharge port; 22. Oil separator inlet; 23. Oil separator discharge port; 24. Ball valve; 25. Refrigerant charging port. Detailed Implementation

[0013] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0014] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0015] It should be noted that similar reference numerals and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0016] In the description of the embodiments of this utility model, it should be noted that the terms "inner", "outer", "upper", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the utility model product is usually placed when in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0017] like Figure 1-3As shown, a falling film chiller unit includes a frame 14, a shell-and-tube condenser 3 fixedly mounted on the frame 14, and a falling film evaporator 4 fixedly mounted on one side of the shell-and-tube condenser 3 on the frame 14. A compressor 1 is fixedly mounted on the upper end of the falling film evaporator 4, and an oil separator 2 is fixedly mounted on the upper end of the shell-and-tube condenser 3. An electrical control box 15 is fixedly mounted on one side of the compressor 1. The shell-and-tube condenser 3 has a cooling water inlet 16 and a cooling water outlet 17 at one end, and the falling film evaporator 4 has a chilled water inlet 18 and a chilled water outlet 19 at one end. The compressor 1 has a compressor suction port 20 and a compressor discharge port 21, and the oil separator 2 has an oil separator inlet 22 and an oil separator discharge port 23. The oil separator 2 is connected to the shell-and-tube condenser 3.

[0018] The compressor suction port 20 is fixedly connected to oil return line 1, oil return line 2 and oil return line 4. Oil return line 1 is fixedly installed between oil separator 2 and compressor 1. Ball valve 24 is fixedly installed on oil return line 1, and filter 6 is fixedly installed on oil return line 1 on one side of ball valve 24. Solenoid valve 12 is fixedly installed on oil return line 1 on one side of filter 6, and sight glass 5 is fixedly installed on oil return line 1 on one side of solenoid valve 12.

[0019] Oil return line 3 is fixedly installed between shell-and-tube condenser 3 and compressor 1. Oil return line 2 and oil return line 4 are fixedly installed between falling film evaporator 4 and compressor 1. Falling film evaporator 4 and compressor 1 are connected through oil return line 2 and oil return line 4. Ball valve 24 and solenoid valve 12 are fixedly installed on oil return line 2 and oil return line 3 respectively. Ball valve 24 is installed on oil return line 4. Filter 6 is fixedly installed on one side of ball valve 24 on oil return line 4. Check valve 8 is fixedly installed on one side of filter 6 on oil return line 4. Ejector pump 7 is fixedly installed on one side of check valve 8 on oil return line 4. Sight glass 5 is fixedly installed on one side of ejector pump 7 on oil return line 4. Filling solenoid valve 9 and venting solenoid valve 10 are fixedly installed on oil return line 2 and oil return line 3 respectively.

[0020] A return oil line five is provided between the shell-and-tube condenser 3 and the falling film evaporator 4. An ejector pump 7 is fixedly installed between the return oil line three and the return oil line two, and the return oil line three and the return oil line two are connected through the ejector pump 7. The return oil line five is set as the refrigerant line five, and a refrigerant charging port 25 is fixedly installed on the refrigerant line five. A ball valve 24 is fixedly installed on the refrigerant line five on one side of the refrigerant charging port 25, and a filter 6 is fixedly installed on the refrigerant line five on one side of the ball valve 24. An electronic expansion valve 11 is fixedly installed on the refrigerant line five on one side of the filter 6. A liquid level sensor 13 is installed on the falling film evaporator 4, and the liquid level sensor 13 is fixedly embedded in the falling film evaporator 4.

[0021] In summary: When using the equipment, first connect the cooling water inlet 16 and cooling water outlet 17 at the front end of the shell-and-tube condenser 3 to the cooling equipment, and connect the chilled water inlet 18 and chilled water outlet 19 on one side of the falling film evaporator 4 to the equipment or water tank that needs to be cooled. In this way, the high-temperature and high-pressure gas discharged by the compressor 1 enters the oil separator 2, and then the oil separator 2 will separate out some of the oil. Then, the refrigerant entering the shell-and-tube condenser 3 will exchange heat with the water to achieve cooling. The cooled refrigerant becomes a high-temperature and high-pressure liquid, and then enters the falling film evaporator 4 through the electronic expansion valve 11. After passing through the falling film evaporator 4, it becomes a low-temperature and low-pressure gas and is drawn back by the compressor 1. This cycle is repeated continuously.

[0022] The foregoing description enables those skilled in the art to implement or use this invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this invention. Therefore, this invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A falling film chiller unit, comprising a frame (14), characterized in that, A shell-and-tube condenser (3) is fixedly installed on the frame (14), and a falling film evaporator (4) is fixedly installed on one side of the shell-and-tube condenser (3) on the frame (14). A compressor (1) is fixedly installed at the upper end of the falling film evaporator (4), and an oil separator (2) is fixedly installed at the upper end of the shell-and-tube condenser (3). An electrical control box (15) is fixedly installed on one side of the compressor (1). A cooling water inlet (16) and a cooling water outlet (17) are provided at one end of the shell-and-tube condenser (3), and a chilled water inlet (18) and a chilled water outlet (19) are provided at one end of the falling film evaporator (4). A compressor suction port (20) and a compressor discharge port (21) are provided on the compressor (1), and an oil separator inlet (22) and an oil separator discharge port (23) are provided on the oil separator (2). The oil separator (2) is connected to the shell-and-tube condenser (3). Oil return lines 1, 2, and 4 are fixedly connected to the compressor intake port (20). Oil return line 1 is fixedly installed between the oil separator (2) and the compressor (1). Oil return line 3 is fixedly installed between the shell-and-tube condenser (3) and the compressor (1). Oil return lines 2 and 4 are fixedly installed between the falling film evaporator (4) and the compressor (1). The falling film evaporator (4) and the compressor (1) are connected by oil return lines. The second oil return line is connected to the fourth oil return line. The shell-and-tube condenser (3) and the falling film evaporator (4) are connected by the fifth oil return line. The third oil return line and the second oil return line are fixedly installed with an ejector pump (7). The third oil return line and the second oil return line are connected through the ejector pump (7). The second oil return line and the third oil return line are respectively fixedly installed with a filling solenoid valve (9) and a drain solenoid valve (10) on the side of the ejector pump (7).

2. A falling film chiller unit according to claim 1, characterized in that, A ball valve (24) is fixedly installed on the first oil return line, and a filter (6) is fixedly installed on the first oil return line on one side of the ball valve (24). A solenoid valve (12) is fixedly installed on the first oil return line on one side of the filter (6), and a sight glass (5) is fixedly installed on the first oil return line on one side of the solenoid valve (12).

3. A falling film chiller unit according to claim 2, characterized in that, Ball valves (24) are fixedly installed on both return oil line two and return oil line three, and solenoid valves (12) are fixedly installed on both return oil line two and return oil line three.

4. A falling film chiller unit according to claim 2, characterized in that, A ball valve (24) is installed on the return oil line 4. A filter (6) is fixedly installed on one side of the ball valve (24) on the return oil line 4. A check valve (8) is fixedly installed on one side of the filter (6) on the return oil line 4. An ejector air pump (7) is fixedly installed on one side of the check valve (8) on the return oil line 4. A sight glass (5) is fixedly installed on one side of the ejector air pump (7) on the return oil line 4.

5. A falling film chiller unit according to claim 1, characterized in that, The return oil line five is configured as a refrigerant line five, and a refrigerant charging port (25) is fixedly installed on the refrigerant line five. A ball valve (24) is fixedly installed on one side of the refrigerant charging port (25) on the refrigerant line five. A filter (6) is fixedly installed on one side of the ball valve (24) on the refrigerant line five. An electronic expansion valve (11) is fixedly installed on one side of the filter (6) on the refrigerant line five.

6. A falling film chiller unit according to claim 1, characterized in that, A liquid level sensor (13) is installed on the falling film evaporator (4), and the liquid level sensor (13) is fixedly embedded on the falling film evaporator (4).

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