Air-cooled screw water chilling unit

Abstract

The utility model relates to the technical field of air conditioning units, in particular to an air-cooled screw type water chilling unit which comprises a lower fixing frame, an upper fixing frame is fixed on the upper surface of the lower fixing frame, the upper end of the upper fixing frame is communicated with two air inlets, heat dissipation fans are fixed in the two air inlets through bolts, and the two air inlets are communicated with the heat dissipation fans through bolts. Four protective nets are symmetrically fixed to the outer wall of the upper fixing frame, two cooling fins are fixed to the interior of the upper fixing frame, heat conduction copper pipes are fixed to the interiors of the two cooling fins, circulating pipes are fixed to the interiors of the heat conduction copper pipes, and fixing flange pipes are fixed to the two ends of each circulating pipe. According to the unit, the heat conduction copper pipe is arranged on the circulating pipe in the sleeved mode, the heat conduction copper pipe can absorb heat of a medium and transmit the heat to the cooling fins, the cooling fan blows air to the cooling fins from top to bottom, and therefore the contact area of the cooling fins and the air is increased, cooling of the medium is improved, and the unit has the good blowing cooling effect.

Description

Technical Field

[0001] The utility model relates to the technical field of air-conditioning units, in particular to an air-cooled screw-type chiller. Background Art

[0002] Air-cooled screw chillers are named air-cooled screw chillers because their key component, the compressor, is a screw type. The refrigerant coming out of the evaporator is in the state of gas; after adiabatic compression by the compressor, it becomes a high-temperature and high-pressure state. The compressed gas refrigerant is isobarically cooled and condensed in the condenser, and changes into liquid refrigerant after condensation. The gas refrigerant re-enters the compressor through the pipeline and starts a new cycle. This is the process of the refrigeration cycle, which is also the main working principle of the screw chiller.

[0003] The patent specification with the announcement number CN218544872U discloses a high-efficiency air-cooled screw chiller, which includes a chiller body, a cooling chamber is arranged at the top of the inner cavity of the chiller body, at least three sets of cooling fans are fixedly installed above the cooling chamber and at the top of the chiller body, and several sets of damping hinges are arranged at the top of the front and back of the chiller body. It timely dissipates the heat of the internal components of the air-cooled screw chiller by turning on the blower to improve the working efficiency of the air-cooled screw chiller.

[0004] However, in the implementation of relevant technologies, it was found that the above-designed high-efficiency air-cooled screw chiller has the following problems: in the above-mentioned technical solution, the internal components of the air-cooled screw chiller are promptly cooled by turning on the hair dryer to improve the working efficiency of the air-cooled screw chiller, but the cooling effect of the medium inside the pipeline by wind blowing is poor. Since the contact area between the pipeline and the air is small, the wind blowing effect is reduced. In view of this, an air-cooled screw chiller is provided to overcome the above-mentioned defects. Utility Model Content

[0005] The utility model aims to solve the shortcomings in the prior art and proposes an air-cooled screw chiller.

[0006] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an air-cooled screw chiller, comprising a lower fixing frame, an upper fixing frame is fixed to the upper surface of the lower fixing frame, the upper end of the upper fixing frame is connected with two air inlets, the interiors of the two air inlets are fixed with heat dissipation fans by bolts, four protective nets are symmetrically fixed to the outer wall of the upper fixing frame, two heat sinks are fixed inside the upper fixing frame, the interiors of the two heat sinks are fixed with heat-conducting copper tubes, the interiors of the heat-conducting copper tubes are fixed with circulation tubes, and both ends of the circulation tubes are fixed with fixed flange tubes.

[0007] As a further description of the above technical solution: a fixing plate is fixed inside the lower fixing frame, and an evaporator is fixed on the upper surface of the fixing plate. The fixing plate arranged on the lower fixing frame can enhance the strength of the unit.

[0008] As a further description of the above technical solution: one side of the evaporator is connected to a screw compressor through a pipeline, and the output end of the screw compressor is connected to a condenser through a pipeline. Through the evaporator arranged on the fixed plate, the medium in the evaporator enters the screw compressor through the pipeline to compress the medium.

[0009] As a further description of the above technical solution: one side of the condenser is connected to a connecting flange pipe, and the connecting flange pipe and the fixed flange pipe are bolted together, so that the compressed medium enters the condenser, and the connecting flange pipe and the fixed flange pipe are fixed with bolts, so that the medium enters the circulation pipe for cooling.

[0010] As a further description of the above technical solution: the outer wall of the evaporator is connected to a reflux flange pipe which is interconnected with the fixed flange pipe, a sealing cover is arranged on the right side of the evaporator, and four fixing bolts which are threadedly connected to the evaporator are installed inside the sealing cover. By unscrewing the fixing bolts on the sealing cover, the sealing cover can be released and the parts inside the evaporator can be maintained.

[0011] As a further description of the above technical solution: a liquid level sensor is installed at the upper end of the evaporator, and a liquid filling port interconnected with the evaporator is provided on the right side of the liquid level sensor. The arranged liquid level sensor can detect the medium capacity inside the evaporator. When it is detected that the medium is less, the liquid level sensor sends a signal to the PLC controller, and the PLC controller controls the alarm to sound an alarm to remind the staff to add the medium.

[0012] As a further description of the above technical solution: the lower surface of the evaporator is connected to a liquid outlet, and the ends of the liquid outlet and the liquid filling port are both threadedly connected with protective covers. By unscrewing the protective cover on the liquid filling port or the liquid outlet, the medium can be added or discharged and replaced, which is convenient for use.

[0013] The utility model has the following beneficial effects:

[0014] The utility model designs an air-cooled screw-type chiller. A heat-conducting copper tube is sleeved on a circulation tube. The heat-conducting copper tube can absorb the heat of the medium and transfer the heat to the heat sink. The heat dissipation fan blows air from top to bottom toward the heat sink, thereby increasing the contact area between the heat sink and the air, improving the cooling of the medium, and making the unit have a good wind-blowing heat dissipation effect. Through the evaporator arranged on the fixed plate, the medium in the evaporator enters the screw compressor through the pipeline to compress the medium.

[0015] The utility model designs an air-cooled screw-type chiller. By unscrewing the fixing bolts on the sealing cover, the sealing cover can be released, and the parts inside the evaporator can be maintained. The arranged liquid level sensor can detect the medium capacity inside the evaporator. When it is detected that the medium is less, the liquid level sensor sends a signal to the PLC controller. The PLC controller controls the alarm to sound an alarm to remind the staff to add the medium. By unscrewing the protective cover on the liquid adding port or the liquid outlet, the medium can be added or discharged for replacement, which is convenient for use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0017] Figure 2 It is a schematic diagram of the cross-sectional structure of the lower fixing frame of the utility model;

[0018] Figure 3 It is a schematic diagram of the cross-sectional structure of the upper fixing frame of the utility model;

[0019] Figure 4 It is a schematic diagram of the cross-sectional structure of the evaporator of the utility model.

[0020] Legend:

[0021] 1. Lower fixing frame; 2. Upper fixing frame; 3. Air inlet; 4. Cooling fan; 5. Protective net; 6. Heat sink; 7. Thermal copper tube; 8. Circulation tube; 9. Fixed flange tube; 10. Fixed plate; 11. Evaporator; 12. Screw compressor; 13. Condenser; 14. Connecting flange tube; 15. Reflux flange tube; 16. Sealing cover; 17. Fixing bolts; 18. Liquid level sensor; 19. Liquid filling port; 20. Liquid outlet; 21. Protective cover. DETAILED DESCRIPTION

[0022] Reference Figure 1-Figure 4 The utility model provides an air-cooled screw chiller: it includes a lower fixing frame 1, an upper fixing frame 2 is fixed on the upper surface of the lower fixing frame 1, the upper end of the upper fixing frame 2 is connected with two air inlets 3, the inside of the two air inlets 3 are fixed with heat dissipation fans 4 by bolts, the outer wall of the upper fixing frame 2 is symmetrically fixed with four protective nets 5, two heat sinks 6 are fixed inside the upper fixing frame 2, heat-conducting copper tubes 7 are fixed inside the two heat sinks 6, a circulation pipe 8 is fixed inside the heat-conducting copper tube 7, and fixed flange pipes 9 are fixed at both ends of the circulation pipe 8, a heat-conducting copper tube 7 is sleeved on the circulation pipe 8, the heat-conducting copper tube 7 can absorb the heat of the medium and transfer the heat to the heat sink 6, and the heat dissipation fan 4 blows air from top to bottom to the heat sink 6, thereby increasing the contact area between the heat sink 6 and the air, improving the cooling of the medium, so that the unit has a good wind-blowing heat dissipation effect.

[0023] As a further implementation scheme of the above technical scheme: a fixing plate 10 is fixed inside the lower fixing frame 1, and an evaporator 11 is fixed on the upper surface of the fixing plate 10. The fixing plate 10 arranged on the lower fixing frame 1 can enhance the strength of the unit.

[0024] As a further implementation scheme of the above technical scheme: one side of the evaporator 11 is connected to the screw compressor 12 through a pipeline, and the output end of the screw compressor 12 is connected to the condenser 13 through a pipeline. Through the evaporator 11 set on the fixed plate 10, the medium in the evaporator 11 enters the screw compressor 12 through the pipeline to compress the medium.

[0025] As a further implementation scheme of the above technical scheme: one side of the condenser 13 is connected to a connecting flange pipe 14, and the connecting flange pipe 14 and the fixed flange pipe 9 are bolted together, so that the compressed medium enters the condenser 13, and the connecting flange pipe 14 and the fixed flange pipe 9 are fixed with bolts, so that the medium enters the circulation pipe 8 for cooling.

[0026] In specific implementation, before using the air-cooled screw chiller, the lower fixing frame 1 is first placed in a suitable position. When in use, the medium in the evaporator 11 is passed through the evaporator 11 arranged on the fixing plate 10, and enters the screw compressor 12 through the pipeline, thereby compressing the medium. The compressed medium enters the condenser 13, and the connecting flange pipe 14 and the fixed flange pipe 9 are fixed with bolts, so that the medium enters the circulation pipe 8 for cooling. Since the circulation pipe 8 is sleeved with a heat-conducting copper pipe 7, the heat-conducting copper pipe 7 can absorb the heat of the medium in the circulation pipe 8, and then transfer the heat to the heat sink 6. At this time, through the air inlet 3 on the upper fixing frame 2, the heat dissipation fan 4 blows air from top to bottom to the heat sink 6, thereby increasing the contact area between the heat sink 6 and the air, and improving the cooling effect on the medium, and the air carrying heat is discharged to the outside through the protective net 5 on the upper fixing frame 2.

[0027] As a further implementation scheme of the above technical scheme: the outer wall of the evaporator 11 is connected with a reflux flange pipe 15 which is interconnected with the fixed flange pipe 9, a sealing cover 16 is arranged on the right side of the evaporator 11, and four fixing bolts 17 which are threadedly connected to the evaporator 11 are installed inside the sealing cover 16. By unscrewing the fixing bolts 17 on the sealing cover 16, the sealing cover 16 can be released and the parts inside the evaporator 11 can be maintained.

[0028] As a further implementation scheme of the above technical scheme: a liquid level sensor 18 is installed at the upper end of the evaporator 11, and a liquid filling port 19 interconnected with the evaporator 11 is provided on the right side of the liquid level sensor 18. The set liquid level sensor 18 can detect the medium capacity inside the evaporator 11. When it is detected that the medium is less, the liquid level sensor 18 sends a signal to the PLC controller, and the PLC controller controls the alarm to sound an alarm to remind the staff to add medium.

[0029] As a further implementation scheme of the above technical scheme: the lower surface of the evaporator 11 is connected to a liquid outlet 20, and the ends of the liquid outlet 20 and the liquid filling port 19 are both threadedly connected with a protective cover 21. By unscrewing the protective cover 21 on the liquid filling port 19 or the liquid outlet 20, the medium can be added or discharged and replaced, which is convenient for use.

[0030] During specific implementation, by continuously entering the medium into the circulation pipe 8, the medium passes through the reflux flange pipe 15 at the other end of the circulation pipe 8 and re-enters the evaporator 11 for circulation. By unscrewing the fixing bolts 17 on the sealing cover 16, the fixing of the sealing cover 16 can be released, and the parts inside the evaporator 11 can be maintained. The set liquid level sensor 18 can detect the medium capacity inside the evaporator 11. When it is detected that the medium is less, the liquid level sensor 18 sends a signal to the PLC controller, and the PLC controller controls the alarm to sound an alarm to remind the staff to add medium. By unscrewing the protective cover 21 on the liquid filling port 19 or the liquid outlet 20, the medium can be added or discharged and replaced, which is convenient for use.

[0031] Finally, it should be noted that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An air-cooled screw chiller, comprising a lower fixing frame (1), an upper fixing frame (2) being fixed to the upper surface of the lower fixing frame (1), characterized in that: The upper end of the upper fixing frame (2) is connected to two air inlets (3), and heat dissipation fans (4) are fixed inside the two air inlets (3) by bolts. Four protective nets (5) are symmetrically fixed to the outer wall of the upper fixing frame (2), and two heat sinks (6) are fixed inside the upper fixing frame (2), and heat-conducting copper tubes (7) are fixed inside the two heat sinks (6). A circulation tube (8) is fixed inside the heat-conducting copper tube (7), and fixed flange tubes (9) are fixed at both ends of the circulation tube (8).

2. The air-cooled screw chiller according to claim 1, characterized in that: A fixing plate (10) is fixed inside the lower fixing frame (1), and an evaporator (11) is fixed on the upper surface of the fixing plate (10).

3. The air-cooled screw chiller according to claim 2, characterized in that: One side of the evaporator (11) is connected to a screw compressor (12) via a pipeline, and the output end of the screw compressor (12) is connected to a condenser (13) via a pipeline.

4. The air-cooled screw chiller according to claim 3, characterized in that: One side of the condenser (13) is connected to a connecting flange pipe (14), and the connecting flange pipe (14) is connected to the fixed flange pipe (9) by bolts.

5. The air-cooled screw chiller according to claim 4, characterized in that: The outer wall of the evaporator (11) is connected to a return flange pipe (15) which is in communication with the fixed flange pipe (9). A sealing cover (16) is provided on the right side of the evaporator (11). Four fixing bolts (17) which are threadedly connected to the evaporator (11) are installed inside the sealing cover (16).

6. The air-cooled screw chiller according to claim 3, characterized in that: A liquid level sensor (18) is installed at the upper end of the evaporator (11), and a liquid filling port (19) communicating with the evaporator (11) is provided on the right side of the liquid level sensor (18).

7. The air-cooled screw chiller according to claim 6, characterized in that: The lower surface of the evaporator (11) is connected to a liquid outlet (20), and the ends of the liquid outlet (20) and the liquid filling port (19) are both threadedly connected to a protective cover (21).

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