Water cooling unit

Abstract

An inlet of an electric heating pipe is connected with a main circulation inlet pipe, an outlet of the electric heating pipe is connected with one end of a refrigeration channel of an evaporator through a first circulation pump, the other end of the refrigeration channel of the evaporator is connected with an inlet of the electric heating pipe, and inner circulation is formed. The outlet of the second circulating pump is connected with the main circulating outlet pipe to form external circulation; an outlet of the evaporator is connected with an inlet of the heat regenerator first channel, an outlet of the heat regenerator first channel is connected with an inlet of the compressor, an outlet of the compressor is sequentially connected with the oil separator, the condenser and the drying filter, and an outlet of the drying filter is connected with an inlet of the first electronic expansion valve. An outlet of the first electronic expansion valve is connected with an inlet of the regenerator second channel, and an outlet of the regenerator second channel is connected with an inlet of the evaporator. The water chilling unit has the advantages of being high in efficiency, good in stability and stable in temperature control.

Description

Technical Field

[0001] The utility model belongs to the technical field of refrigeration equipment, and specifically relates to a water cooling unit. Background Art

[0002] A water-cooled unit generally refers to a centrifugal refrigeration unit. A centrifugal water-cooled unit uses electricity as a power source. The Freon refrigerant evaporates in the evaporator and absorbs the heat of the refrigerant water to perform refrigeration. The Freon wet vapor after evaporation and heat absorption is compressed by the compressor into a high-temperature and high-pressure gas, which is condensed by a water-cooled condenser and becomes liquid. It is throttled by the expansion valve and enters the evaporator for recirculation.

[0003] The existing water cooling unit cannot control the water flow rate while cooling and controlling the temperature, so that the temperature control accuracy of the system cannot meet the system with high-precision temperature control requirements; and there is no device to recycle the heat dissipated by the water cooling unit, resulting in a waste of thermal energy resources. Utility Model Content

[0004] The purpose of the utility model is to overcome the deficiencies in the prior art and provide a water-cooled unit. The utility model recovers the waste heat in the exhaust pressure and condensation temperature of the refrigeration system through the economizer, thereby improving the energy efficiency ratio of the system. Compared with the traditional screw compression refrigeration system, its energy efficiency is improved by about 10%-20%; the refrigeration system with an economizer of the utility model has high stability and can maintain a stable operating state under changing working conditions. Under different loads, the system can be adaptively adjusted, which improves the efficiency and stability of the system and can also reduce the noise and vibration generated when the system is working.

[0005] In order to achieve the above technical objectives, the technical solution adopted by the embodiment of the utility model is:

[0006] A water cooling unit comprises an electric heating pipe, an evaporator, a regenerator, a compressor, an oil separator, a condenser and a drying filter, wherein the inlet of the electric heating pipe is connected to a main circulation inlet pipe, and the main circulation inlet pipe is used to introduce a heat transfer medium refluxed from a temperature-controlled device; the outlet of the electric heating pipe is connected to the inlet of a first circulation pump through a pipeline, the outlet of the first circulation pump is connected to one end of a refrigeration channel of an evaporator through a pipeline, and the other end of the refrigeration channel of the evaporator is connected to the inlet of the electric heating pipe to form an internal circulation; the outlet of the electric heating pipe is also connected to the inlet of a second circulation pump through a pipeline, and the outlet of the second circulation pump is connected to the main circulation outlet pipe to form an external circulation, and the main circulation outlet pipe is used to transport the heat transfer medium to the temperature-controlled device;

[0007] The outlet of the evaporator is connected to the inlet of the first channel of the regenerator, the outlet of the first channel of the regenerator is connected to the inlet of the compressor, the outlet of the compressor is connected to the inlet of the oil separator, the outlet of the oil separator is connected to the inlet of the condenser, the outlet of the condenser is connected to the inlet of the drying filter, the outlet of the drying filter is connected to the inlet of the first electronic expansion valve, the outlet of the first electronic expansion valve is connected to the inlet of the second channel of the regenerator, and the outlet of the second channel of the regenerator is connected to the inlet of the evaporator.

[0008] Furthermore, the outlet of the electric heating pipe is connected to the inlet of an expansion tank, and the outlet of the expansion tank is connected to the inlet of the electric heating pipe. A first one-way valve is arranged between the outlet of the expansion tank and the inlet of the electric heating pipe, and the first one-way valve allows the heat transfer medium to flow from the expansion tank to the electric heating pipe.

[0009] Furthermore, a discharge pipe is arranged between the outlet of the electric heating tube and the inlet of the first circulation pump; a liquid inlet pipe is arranged at the inlet end of the expansion tank, a liquid infusion pump is arranged on the liquid inlet pipe, a second one-way valve is arranged between the outlet of the liquid infusion pump and the inlet of the expansion tank, and the second one-way valve allows liquid to enter the expansion tank from the liquid infusion pump.

[0010] Furthermore, a third one-way valve is provided at the inlet end of the second circulation pump, and the third one-way valve allows the heat-conducting medium to enter the second circulation pump from the electric heating pipe. A first pressure sensor is provided at the outlet end of the second circulation pump.

[0011] Furthermore, a solenoid valve, a fourth one-way valve, a first temperature sensor, a second pressure sensor and a flow meter are sequentially arranged between the inlet end of the electric heating pipe and the main circulation inlet pipe along the flow direction of the heat transfer medium, and the fourth one-way valve allows the heat transfer medium to enter the electric heating pipe.

[0012] Furthermore, an economizer is provided between the drying filter and the first electronic expansion valve, the outlet end of the drying filter is connected to the inlet end of the first channel of the economizer, and the outlet end of the first channel of the economizer is connected to the inlet end of the first electronic expansion valve.

[0013] Furthermore, a second electronic expansion valve is provided between the outlet end of the oil separator and the outlet end of the first electronic expansion valve.

[0014] Furthermore, a liquid spray capillary is provided at the inlet end of the second channel of the economizer, the inlet end of the liquid spray capillary is connected to the outlet end of the drying filter, the outlet end of the liquid spray capillary is connected to the inlet end of the second channel of the economizer, and the outlet end of the second channel of the economizer is connected to the inlet end of the compressor.

[0015] Furthermore, a return pipeline is provided between the outlet end of the oil separator and the inlet end of the compressor.

[0016] Further, a second temperature sensor for detecting the temperature of the electric heating tube is provided on the electric heating tube, a third temperature sensor for detecting the temperature of the liquid supply is provided at the outlet end of the electric heating tube, a fourth temperature sensor for detecting the suction temperature is provided at the inlet end of the compressor, and a fifth temperature sensor for detecting the exhaust temperature is provided between the outlet end of the compressor and the inlet end of the oil separator;

[0017] The outlet end of the evaporator is provided with a third pressure sensor for detecting the suction pressure, and the outlet end of the compressor is provided with a fourth pressure sensor for detecting the exhaust pressure.

[0018] The beneficial effects brought by the technical solution provided by the embodiment of the utility model are:

[0019] The main circulation system of the constant temperature water cooling unit of the utility model adopts a double circulation system. The inner circulation is formed between the electric heating tube and the evaporator, and is used to cool down and control the temperature of the heat-conducting medium. The outer circulation is formed between the main circulation inlet pipe and the main circulation outlet pipe, and is mainly used to control the flow of the heat-conducting medium. The double circulation system can control the flow of the heat-conducting medium while cooling and controlling the temperature. The temperature control accuracy is higher, and it can be used in systems with high-precision temperature control requirements.

[0020] The utility model recovers waste heat in the exhaust pressure and condensing temperature of the refrigeration system through the economizer, thereby improving the energy efficiency ratio of the system. Compared with the traditional screw compression refrigeration system, its energy efficiency is improved by about 10%-20%; the refrigeration system with economizer of the utility model is highly stable and can maintain a stable operating state under changing working conditions. Under different loads, the system can be adaptively adjusted, which improves the efficiency and stability of the system and can also reduce the noise and vibration generated when the system is working.

[0021] The utility model water-cooling unit is further provided with a second electronic expansion valve between the outlet end of the oil separator and the inlet of the second channel of the regenerator. The second electronic expansion valve is a thermostatic valve. The high-pressure steam coming out of the oil separator enters the regenerator in the form of gas through the second electronic expansion valve, and is mixed with the gas-liquid two-phase mixture coming out of the first electronic expansion valve for heat exchange in the regenerator. By adjusting the flow ratio of the two, the temperature can be regulated more accurately, meeting the needs of a high-precision temperature control system. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the plane distribution of the water cooling unit in the embodiment of the utility model.

[0023] Explanation of the reference numerals: 1-electric heating tube; 2-evaporator; 3-regenerator; 4-compressor; 5-oil separator; 6-condenser; 7-drying filter; 8-first circulation pump; 9-second circulation pump; 10-first electronic expansion valve; 11-expansion tank; 12-first non-return valve; 13-liquid replenishing pump; 14-second non-return valve; 15-third non-return valve; 16-first pressure sensor; 17-solenoid valve; 18-fourth non-return valve; 19-first temperature sensor; 20-second pressure sensor; 21-flow meter; 22-economizer; 23-second electronic expansion valve; 24-second temperature sensor; 25-third temperature sensor; 26-fourth temperature sensor; 27-fifth temperature sensor; 28-third pressure sensor; 29-fourth pressure sensor. DETAILED DESCRIPTION

[0024] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "inside, outside", "up, down", "left, right", etc. are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention.

[0025] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0026] Example 1

[0027] A water cooling unit comprises an electric heating tube 1, an evaporator 2, a regenerator 3, a compressor 4, an oil separator 5, a condenser 6 and a drying filter 7, wherein the inlet of the electric heating tube 1 is connected to a main circulation inlet pipe, and the main circulation inlet pipe is used to introduce a heat transfer medium refluxed from a temperature-controlled device; the outlet of the electric heating tube 1 is connected to the inlet of a first circulation pump 8 through a pipeline, and the outlet of the first circulation pump 8 is connected to one end of a refrigeration channel of the evaporator 2 through a pipeline, and the other end of the refrigeration channel of the evaporator 2 is connected to the inlet of the electric heating tube 1 to form an internal circulation; the outlet of the electric heating tube 2 is also connected to the inlet of a second circulation pump 9 through a pipeline, and the outlet of the second circulation pump 9 is connected to the main circulation outlet pipe to form an external circulation, and the main circulation outlet pipe is used to transport the heat transfer medium to the temperature-controlled device;

[0028] The outlet of the evaporator 2 is connected to the inlet of the first channel of the regenerator 3, the outlet of the first channel of the regenerator 3 is connected to the inlet of the compressor 4, the outlet of the compressor 4 is connected to the inlet of the oil separator 5, the outlet of the oil separator 5 is connected to the inlet of the condenser 6, the outlet of the condenser 6 is connected to the inlet of the drying filter 7, the outlet of the drying filter 7 is connected to the inlet of the first electronic expansion valve 10, the outlet of the first electronic expansion valve 10 is connected to the inlet of the second channel of the regenerator 3, and the outlet of the second channel of the regenerator 3 is connected to the inlet of the evaporator 2.

[0029] The outlet of the electric heating pipe 1 is connected to the inlet of the expansion tank 11, and the outlet of the expansion tank 11 is connected to the inlet of the electric heating pipe 1. A first one-way valve 12 is arranged between the outlet of the expansion tank 11 and the inlet of the electric heating pipe 2. The first one-way valve 12 allows the heat transfer medium to flow from the expansion tank 11 to the electric heating pipe 1.

[0030] A discharge pipe is arranged between the outlet of the electric heating tube 1 and the inlet of the first circulation pump 8; a liquid inlet pipe is arranged at the inlet end of the expansion tank 11, and a liquid replenishing pump 13 is arranged on the liquid inlet pipe. A second one-way valve 14 is arranged between the outlet of the liquid replenishing pump 13 and the inlet of the expansion tank 11, and the second one-way valve 14 allows liquid to enter the expansion tank 11 from the liquid replenishing pump 13.

[0031] A third one-way valve 15 is provided at the inlet end of the second circulation pump 9 , and the third one-way valve 15 allows the heat transfer medium to enter the second circulation pump 9 from the electric heating pipe 1 . A first pressure sensor 16 is provided at the outlet end of the second circulation pump 9 .

[0032] A solenoid valve 17, a fourth one-way valve 18, a first temperature sensor 19, a second pressure sensor 20 and a flow meter 21 are sequentially arranged between the inlet end of the electric heating tube 1 and the main circulation inlet pipe along the flow direction of the heat transfer medium. The fourth one-way valve 18 allows the heat transfer medium to enter the electric heating tube 1.

[0033] An economizer 22 is provided between the filter drier 7 and the first electronic expansion valve 10 , the outlet end of the filter drier 7 is connected to the inlet end of the first channel of the economizer 22 , and the outlet end of the first channel of the economizer 22 is connected to the inlet end of the first electronic expansion valve 10 .

[0034] A second electronic expansion valve 23 is provided between the outlet end of the oil separator 5 and the outlet end of the first electronic expansion valve 10 , and the second electronic expansion valve 23 is a thermostatic valve.

[0035] A liquid spray capillary is provided at the inlet end of the second channel of the economizer 22, the inlet end of the liquid spray capillary is connected to the outlet end of the drying filter 7, the outlet end of the liquid spray capillary is connected to the inlet end of the second channel of the economizer 22, and the outlet end of the second channel of the economizer 22 is connected to the inlet end of the compressor 4.

[0036] A return pipeline is provided between the outlet end of the oil separator 5 and the inlet end of the compressor 4 .

[0037] The electric heating tube 1 is provided with a second temperature sensor 24 for detecting the temperature of the electric heating tube 1, the outlet end of the electric heating tube 1 is provided with a third temperature sensor 25 for detecting the temperature of the liquid supply, the inlet end of the compressor 4 is provided with a fourth temperature sensor 26 for detecting the suction temperature, and the outlet end of the compressor 4 and the inlet end of the oil separator 5 are provided with a fifth temperature sensor 27 for detecting the exhaust temperature;

[0038] A third pressure sensor 28 for detecting suction pressure is disposed at the outlet end of the evaporator 2 , and a fourth pressure sensor 29 for detecting exhaust pressure is disposed at the outlet end of the compressor 4 .

[0039] The heat-conducting medium returned by the temperature-controlled device enters the electric heating tube 1 through the self-circulating inlet pipe, and is heated in the electric heating tube 1. A part of the heated heat-conducting medium enters the refrigeration channel of the evaporator 2 through the first circulation pump 8, and the heat-conducting medium coming out of the refrigeration channel of the evaporator 2 flows back to the electric heating tube 1, forming an internal circulation for cooling and controlling the temperature of the temperature-controlled device; another part of the heated heat-conducting medium enters the second circulation pump 9 from the third one-way valve 15 in one direction, and enters the main circulation outlet pipe from the second circulation pump 9 to form an external circulation, and the main circulation outlet pipe is used to transport the heat-conducting medium to the temperature-controlled device. The temperature, pressure and flow rate of the heat-conducting medium entering the main circulation system are detected by the first temperature sensor 19, the second pressure sensor 20 and the flow meter 21 located at the inlet end of the electric heating tube 1, and the pressure of the heat-conducting medium entering the temperature-controlled device in the main circulation system is detected by the first pressure sensor 16 at the outlet end of the second circulation pump 9. The flow rate, speed and other parameters of the heat-conducting medium entering the main circulation inlet pipe are controlled by the solenoid valve 17 in combination with actual conditions.

[0040] The utility model arranges an economizer 22 before the drying filter 7 and the first electronic expansion valve 10. A part of the high-pressure liquid refrigerant after the impurities are removed by the drying filter 7 is passed into the first channel of the economizer 22, and the other part enters the second channel of the economizer 22 after throttling by the liquid spray capillary, and heat exchange is performed in the economizer 22. The gaseous refrigerant flows back from the outlet of the second channel of the economizer 22 and enters the compressor 4 for compression. The liquid refrigerant flows out from the outlet of the second channel of the economizer 22, enters the regenerator 3 in the form of low-pressure wet steam for heat exchange, and then returns to the evaporator 2. After two heat exchanges in the economizer 22 and the regenerator 3, the refrigeration system has a high stability and can maintain a stable operating state under changing working conditions. Under different loads, the system can be adaptively adjusted, which improves the efficiency and stability of the system and can also reduce the noise and vibration generated when the system is working.

[0041] On the other hand, a second electronic expansion valve 23 is provided between the outlet end of the oil separator 5 and the inlet of the second channel of the regenerator 3. The second electronic expansion valve 23 is a thermostatic valve. The high-pressure steam coming out of the oil separator 5 enters the regenerator 3 in the form of gas through the second electronic expansion valve 23, and is mixed with the gas-liquid two-phase mixture coming out of the first electronic expansion valve 10 in the regenerator 3 for heat exchange. By adjusting the flow ratio of the two, the temperature can be regulated more accurately to meet the needs of a high-precision temperature control system.

[0042] Finally, it should be noted that the above specific implementation methods are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to examples, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A water cooling unit, It is characterized in that The invention comprises an electric heating pipe (1), an evaporator (2), a regenerator (3), a compressor (4), an oil separator (5), a condenser (6) and a drying filter (7), wherein the inlet of the electric heating pipe (1) is connected to a main circulation inlet pipe, and the main circulation inlet pipe is used to introduce a heat transfer medium refluxed from a temperature-controlled device; the outlet of the electric heating pipe (1) is connected to the inlet of a first circulation pump (8) through a pipeline, and the outlet of the first circulation pump (8) is connected to one end of a refrigeration channel of the evaporator (2) through a pipeline, and the other end of the refrigeration channel of the evaporator (2) is connected to the inlet of the electric heating pipe (1), so as to form an internal circulation; the outlet of the electric heating pipe (1) is also connected to the inlet of a second circulation pump (9) through a pipeline, and the outlet of the second circulation pump (9) is connected to the main circulation outlet pipe to form an external circulation, and the main circulation outlet pipe is used to transport the heat transfer medium to the temperature-controlled device; The outlet of the evaporator (2) is connected to the inlet of the first channel of the regenerator (3), the outlet of the first channel of the regenerator (3) is connected to the inlet of the compressor (4), the outlet of the compressor (4) is connected to the inlet of the oil separator (5), the outlet of the oil separator (5) is connected to the inlet of the condenser (6), the outlet of the condenser (6) is connected to the inlet of the drying filter (7), the outlet of the drying filter (7) is connected to the inlet of the first electronic expansion valve (10), the outlet of the first electronic expansion valve (10) is connected to the inlet of the second channel of the regenerator (3), and the outlet of the second channel of the regenerator (3) is connected to the inlet of the evaporator (2).

2. The water cooling unit according to claim 1, It is characterized in that The outlet of the electric heating pipe (1) is connected to the inlet of the expansion tank (11), and the outlet of the expansion tank (11) is connected to the inlet of the electric heating pipe (1). A first one-way valve (12) is provided between the outlet of the expansion tank (11) and the inlet of the electric heating pipe (1), and the first one-way valve (12) allows the heat-conducting medium to flow from the expansion tank (11) to the electric heating pipe (1).

3. The water cooling unit according to claim 2, It is characterized in that A liquid discharge pipe is provided between the outlet of the electric heating tube (1) and the inlet of the first circulation pump (8); a liquid inlet pipe is provided at the inlet end of the expansion tank (11), a liquid replenishing pump (13) is provided on the liquid inlet pipe, and a second one-way valve (14) is provided between the outlet of the liquid replenishing pump (13) and the inlet of the expansion tank (11), and the second one-way valve (14) allows liquid to enter the expansion tank (11) from the liquid replenishing pump (13).

4. The water cooling unit according to claim 1, It is characterized in that A third one-way valve (15) is provided at the inlet end of the second circulation pump (9), and the third one-way valve (15) allows the heat-conducting medium to enter the second circulation pump (9) from the electric heating pipe (1). A first pressure sensor (16) is provided at the outlet end of the second circulation pump (9).

5. The water cooling unit according to claim 1, It is characterized in that A solenoid valve (17), a fourth one-way valve (18), a first temperature sensor (19), a second pressure sensor (20) and a flow meter (21) are sequentially arranged between the inlet end of the electric heating pipe (1) and the main circulation inlet pipe along the flow direction of the heat-conducting medium, and the fourth one-way valve (18) allows the heat-conducting medium to enter the electric heating pipe (1).

6. The water cooling unit according to claim 1, It is characterized in that An economizer (22) is provided between the drying filter (7) and the first electronic expansion valve (10); the outlet end of the drying filter (7) is connected to the inlet end of the first channel of the economizer (22); and the outlet end of the first channel of the economizer (22) is connected to the inlet end of the first electronic expansion valve (10).

7. The water cooling unit according to claim 1, It is characterized in that A second electronic expansion valve (23) is provided between the outlet end of the oil separator (5) and the outlet end of the first electronic expansion valve (10).

8. The water cooling unit according to claim 6, It is characterized in that The inlet end of the second channel of the economizer (22) is provided with a liquid spray capillary, the inlet end of the liquid spray capillary is connected to the outlet end of the drying filter (7), the outlet end of the liquid spray capillary is connected to the inlet end of the second channel of the economizer (22), and the outlet end of the second channel of the economizer (22) is connected to the inlet end of the compressor (4).

9. The water cooling unit according to claim 1, It is characterized in that A return pipeline is provided between the outlet end of the oil separator (5) and the inlet end of the compressor (4).

10. The water cooling unit according to claim 1, It is characterized in that The electric heating tube (1) is provided with a second temperature sensor (24) for detecting the temperature of the electric heating tube (1); the outlet end of the electric heating tube (1) is provided with a third temperature sensor (25) for detecting the temperature of the liquid supply; the inlet end of the compressor (4) is provided with a fourth temperature sensor (26) for detecting the suction temperature; and a fifth temperature sensor (27) for detecting the exhaust temperature is provided between the outlet end of the compressor (4) and the inlet end of the oil separator (5); The outlet end of the evaporator (2) is provided with a third pressure sensor (28) for detecting the suction pressure, and the outlet end of the compressor (4) is provided with a fourth pressure sensor (29) for detecting the exhaust pressure.

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