CN101986062A - Condensation temperature-adjusting refrigeration system - Google Patents
Condensation temperature-adjusting refrigeration system Download PDFInfo
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Abstract
The invention relates to a condensation temperature-adjusting refrigeration system which comprises a compressor, an oil separator, a condenser, a liquid receiver, a refrigeration electromagnetic valve, a refrigeration expansion valve, an evaporator, a gas-liquid separator, a condensation temperature-adjusting heat exchanger, a bypass expansion valve, a condensation pressure sensor, a controller, a condenser electromagnetic valve, a condensation temperature-adjusting heat exchanger electromagnetic valve and a bypass electromagnetic valve. The system provides a refrigeration circulating system which can adjust the condensation temperature of an air-cooling condenser unit. By changing the condensation area to adjust the heat exchange of the condenser and changing the inlet air temperature of the condenser to change the heat transfer temperature difference of the condenser, the adjustment on the heat exchange of the condenser is realized so as to achieve the purpose of raising or lowering the condensation temperature, so that the system can be adapted to the influence caused by the change of the environment temperature. Thus, the system can stably operate for a long time at overlow environmental temperature of below 0 DEG C and high environmental temperature of above 43 DEG C, and has the characteristic of low cost.
Description
Technical field
The invention belongs to refrigeration technology field, relate in particular to the air-cooled condenser cooling cycle system.
Background technology
The condenser that refrigeration system is used mainly is air-cooled condenser and water-cooled condenser, because air-cooled condenser has the clear superiority that does not need water source and water circulation system, is applied in the refrigeration system widely.The deficiency of the air-cooled condenser of prior art is influenced by ambient temperature very big, in order to guarantee the normal pressure ratio of refrigeration unit circulation, general refrigeration unit all limits the environment temperature of use, environment temperature is generally in 0 ℃～43 ℃ scopes, environment temperature is crossed low and too high, alarm for high voltage and low pressure alarming all can take place in refrigeration unit, have caused environment temperature to cross the problem that air-cooled condenser type refrigeration unit can not be used in low country and the too high area of environment temperature.In recent years, generally there is the trend that warms in the whole world, even in some areas, summer occurred the continuous high temperature weather more than 45 ℃, and the fault of alarm for high voltage frequently takes place.And reduce the service life of unit in limiting condition running meeting for a long time, and the efficiency of unit is reduced.
Experimental results show that under the high ambient temperature situation, increase heat exchange area and improve air quantity not fairly obvious to the effect that condensation temperature reduces, and all can cause the significantly increase of cost, if select excessive heat exchange area and too high air quantity according to limit applying working condition, can cause the condensation temperature under the low ambient temperature condition low excessively, system can not be run well.
Summary of the invention
The purpose of this invention is to provide a kind of condensation temperature that can regulate air-cooled condenser type refrigeration unit according to the variation of environment temperature, avoid the condensation temperature of alarm for high voltage and low pressure alarming to regulate refrigeration system, and with low cost.
Technical scheme of the present invention is: condensation temperature is regulated refrigeration system, comprise compressor, oil eliminator, condenser, liquid reservoir, refrigeration magnetic valve, refrigeration expansion valve, evaporimeter and gas-liquid separator, above-mentioned parts are connected with valve by pipeline successively, it is characterized in that
Described condensation temperature is regulated refrigeration system and is comprised that also condensation temperature is regulated heat exchanger, condensation temperature is regulated magnetic valve, bypass expansion valve, condensing pressure sensor and controller; Described condensation temperature is regulated magnetic valve and is comprised condenser magnetic valve, condensation temperature adjusting heat exchanger magnetic valve and bypass solenoid valve;
Described condenser magnetic valve comprises condenser inlet magnetic valve and condensator outlet magnetic valve, and the outlet of condenser inlet magnetic valve is connected with the import of condenser, and the import of condensator outlet magnetic valve is connected with the outlet of condenser; Condensation temperature is regulated the heat exchanger magnetic valve and is comprised that condensation temperature is regulated heat exchanger import magnetic valve and condensation temperature is regulated the heat exchanger exit magnetic valve, condensation temperature is regulated heat exchanger import electromagnetic valve outlet and is connected with the import of condensation temperature adjusting heat exchanger, and condensation temperature is regulated the import of heat exchanger exit magnetic valve and is connected with the outlet that condensation temperature is regulated heat exchanger; Bypass solenoid valve comprises bypass inlet magnetic valve and bypass outlet magnetic valve, the outlet of bypass inlet magnetic valve is connected condensation temperature and regulates on heat exchanger import electromagnetic valve outlet and the pipeline that the import of condensation temperature adjusting heat exchanger is connected, the import of bypass outlet magnetic valve is connected condensation temperature and regulates on the import of heat exchanger exit magnetic valve and the pipeline that condensation temperature adjusting heat exchanger exit is connected, the import of bypass inlet magnetic valve and bypass expansion valve are connected in series, and the outlet of bypass outlet magnetic valve is connected on the connecting line of evaporimeter and gas-liquid separator;
The outlet of described liquid reservoir is divided into two-way, and one the tunnel is connected with the import of the magnetic valve that freezes, and another road is connected with the import of bypass expansion valve;
Described oil eliminator export pipeline is divided into two-way behind one section main pipe rail, one the tunnel is connected with the import of condenser inlet magnetic valve, the import that another road and condensation temperature are regulated heat exchanger import magnetic valve is connected, and it is one the tunnel to enter the mouth with liquid reservoir and to be connected that the outlet that the outlet of condensator outlet magnetic valve and condensation temperature are regulated the heat exchanger exit magnetic valve gathers; The installation direction of condenser fan blows to condenser for making air-out direction regulate heat exchanger by condensation temperature;
Described condensing pressure sensor is installed on the main pipe rail of oil eliminator export pipeline, and the condensing pressure sensor is by line connecting controller, and controller is connected with the control circuit that refrigeration magnetic valve and condensation temperature are regulated magnetic valve.
Described compressor is constant volume or variable conpacitance compressor; It is air-cooled heat exchanger that described condenser and condensation temperature are regulated heat exchanger; The heat exchange area that the heat exchange area of described condenser is regulated heat exchanger than described condensation temperature is big;
The control method that described condensation temperature is regulated refrigeration system is: refrigeration system is out of service, all closed electromagnetic valves, when control system is transmitted signal to the refrigeration magnetic valve, the refrigeration magnetic valve is opened, condenser magnetic valve and condensation temperature are regulated the heat exchanger magnetic valve and are opened, and condenser and condensation temperature are regulated heat exchanger and all used as condenser; When environment temperature is crossed when low, the condensing pressure sensor judges that condensing pressure is low excessively, and transmit signal and give controller, controller is handled and is transmitted new signal and regulates the control circuit of heat exchanger magnetic valve for condenser magnetic valve and condensation temperature to signal, when condensing pressure is lower than when setting minimum condensation temperature is not regulated the heat exchanger closed electromagnetic valve, when condensing pressure is lower than when setting minimum the condenser closed electromagnetic valve; When environment temperature raises, the condensing pressure sensor is judged the condensing pressure height, and transmit signal and give controller, controller is handled signal and is judged and open the condenser magnetic valve, close condensation temperature simultaneously and regulate the heat exchanger magnetic valve, or condenser magnetic valve and condensation temperature are regulated the heat exchanger magnetic valve and all opened; Under the situation that condenser magnetic valve and condensation pressure regulation heat exchanger magnetic valve are all opened, the condensing pressure sensor is judged that still condensing pressure is too high and is transmitted signal and give controller, this moment, controller transmitted signal is regulated heat exchanger magnetic valve and bypass solenoid valve to condensation temperature control circuit, condensation temperature is regulated the heat exchanger closed electromagnetic valve, bypass solenoid valve is opened, this moment, condensation temperature was regulated the temperature of heat exchanger inner refrigerant far below environment temperature, regulate heat exchanger by condensation temperature and reduce the condenser EAT, thereby reduce condensation temperature.
Compared with prior art, the present invention has following characteristics:
1. regulate the break-make of heat exchanger and condenser by condensation temperature, change the condensation area of refrigeration system, thereby regulate the heat exchange amount, improve or reduce condensation temperature.
2. regulate the variation of heat exchanger inner refrigerant state by condensation temperature, change the condenser EAT, thereby change the heat transfer temperature difference of condenser, and then change the heat exchange amount of condenser, improve or reduce condensation temperature.
3. refrigeration system can long-term stability be turned round under the working condition beyond environment temperature is 0 ℃～43 ℃ scopes, improve the variation of ambient temperature scope of application of air-cooled condenser type refrigeration unit, and with low cost.
Description of drawings
The present invention has 2 width of cloth accompanying drawings, wherein
The systematic schematic diagram of Fig. 1 prior art refrigeration system
Fig. 2 systematic schematic diagram of the present invention
In the accompanying drawing, the 1st, compressor, the 2nd, oil eliminator, the 3rd, condenser, the 4th, condensation temperature is regulated heat exchanger, the 5th, liquid reservoir, the 6th, refrigeration magnetic valve, the 7th, refrigeration expansion valve, the 8th, evaporimeter, the 9th, gas-liquid separator, 10a is the condenser inlet magnetic valve, and 10b is the condensator outlet magnetic valve, and 11a is that condensation temperature is regulated heat exchanger import magnetic valve, 11b is that condensation temperature is regulated the heat exchanger exit magnetic valve, 12a is the bypass inlet magnetic valve, and 12b is a bypass outlet magnetic valve, the 13rd, and the bypass expansion valve, the 14th, condensing pressure sensor, the 15th, controller.
The specific embodiment
Below in conjunction with accompanying drawing specific embodiments of the invention are further described.Fig. 2 is a systematic schematic diagram of the present invention, comprise compressor 1, it is constant volume or variable conpacitance compressor, oil eliminator 2, condenser 3, condensation temperature is regulated heat exchanger 4, liquid reservoir 5, refrigeration magnetic valve 6, refrigeration expansion valve 7, evaporimeter 8, gas-liquid separator 9, condensation temperature is regulated magnetic valve, bypass expansion valve 12a, 12b, condensing pressure sensor 14 and controller 15, condensation temperature is regulated magnetic valve and is comprised condenser magnetic valve 10a, 10b, condensation temperature is regulated heat exchanger magnetic valve 11a, 11b and bypass solenoid valve 12a, 12b, compressor 1 is constant volume or variable conpacitance compressor, it all is air-cooled heat exchanger that condenser 3 and condensation temperature are regulated heat exchanger 4, the heat exchange area that the heat exchange area of condenser 3 is regulated heat exchanger 4 than condensation temperature is twice above, below five times, above-mentioned parts are connected with valve successively by pipeline;
The condenser magnetic valve comprises condenser inlet magnetic valve 10a and condensator outlet magnetic valve 10b, is connected respectively to the import and export of condenser 3; Condensation temperature is regulated the heat exchanger magnetic valve and is comprised that condensation temperature is regulated heat exchanger import magnetic valve 11a and condensation temperature is regulated heat exchanger exit magnetic valve 11b, connects the import and export that condensation temperature is regulated heat exchanger 4 respectively; Bypass solenoid valve comprises bypass inlet magnetic valve 12a and bypass outlet magnetic valve 12b, bypass inlet magnetic valve 12a outlet is connected condensation temperature and regulates on the connecting line of heat exchanger import magnetic valve 11a and 4 imports of condensation temperature adjusting heat exchanger, bypass outlet magnetic valve 12b import is connected condensation temperature and regulates on the connecting line of heat exchanger exit magnetic valve 11b and 4 outlets of described condensation temperature adjusting heat exchanger, liquid reservoir 5 outlets are divided into two-way, be connected with bypass expansion valve 12 with refrigeration magnetic valve 6 respectively, bypass expansion valve 13 is connected with bypass inlet magnetic valve 12a import, the outlet of bypass outlet magnetic valve 12b is connected on the connecting line of evaporimeter 8 and gas-liquid separator 9, oil eliminator 2 outlets are divided into two-way, is connected with the import that the import of condenser inlet magnetic valve 10a and condensation temperature are regulated heat exchanger import magnetic valve 11a respectively, it is one the tunnel to be connected with liquid reservoir 5 that the outlet of the outlet of condensator outlet magnetic valve 10b and condensation temperature adjusting heat exchanger exit magnetic valve 11b gathers;
The installation direction of condenser fan blows to condenser 3 so that air-out direction is regulated heat exchanger 4 by condensation temperature shown in the direction of arrow on the condenser among Fig. 23; Condensing pressure sensor 14 is installed on oil eliminator 2 export pipelines, and by line connecting controller 15, controller 15 is connected with the control circuit that refrigeration magnetic valve 6 and condensation temperature are regulated magnetic valve;
The control method that condensation temperature is regulated refrigeration system is: refrigeration system is out of service, all closed electromagnetic valves, when control system is transmitted signal to refrigeration magnetic valve 6, refrigeration magnetic valve 6 is opened, condenser magnetic valve 10a, 10b and condensation temperature are regulated heat exchanger magnetic valve 11a, 11b, are opened, and condenser 3 and condensation temperature are regulated heat exchanger 4 and all used as condenser; When environment temperature is crossed when low, condensing pressure sensor 14 judges that condensing pressure is low excessively, and transmit signal and give controller 15,15 pairs of signals of controller are handled and are transmitted new signal and regulate the control circuit of heat exchanger magnetic valve 11a, 11b for condenser magnetic valve 10a, 10b and condensation temperature, when condensing pressure is not lower than the setting minimum, condensation temperature is regulated heat exchanger magnetic valve 11a, 11b close, when condensing pressure is lower than the setting minimum, condenser magnetic valve 10a, 10b are closed; When environment temperature raises, condensing pressure sensor 14 is judged the condensing pressure height, and transmit signal and give controller 15,15 pairs of signals of controller are handled and are judged and open condenser magnetic valve 10a, 10b, close condensation temperature simultaneously and regulate heat exchanger magnetic valve 11a, 11b, or condenser magnetic valve 10a, 10b and condensation temperature adjusting heat exchanger magnetic valve 11a, 11b are opened; At condenser magnetic valve 10a, 10b and condensation pressure regulation heat exchanger magnetic valve 11a, under the situation that 11b all opens, condensing pressure sensor 14 is judged that still condensing pressure is too high and is transmitted signal and give controller 15, this moment, controller 15 transmission signals were regulated heat exchanger magnetic valve 11a to condensation temperature, 11b and bypass solenoid valve 12a, the control circuit of 12b, condensation temperature is regulated heat exchanger magnetic valve 11a, 11b closes, with bypass solenoid valve 12a, 12b opens, this moment, condensation temperature was regulated the temperature of the cold-producing medium that flows in the heat exchanger 4 far below environment temperature, regulate heat exchanger 4 by condensation temperature and reduce condenser 3 EATs, promptly regulating heat exchanger 4 by condensation temperature absorbs heat from surrounding environment, condenser 4 inhaled air temperature are reduced, thereby reduce condensation temperature.
Claims (5)
1. condensation temperature is regulated refrigeration system, comprise compressor (1), oil eliminator (2), condenser (3), liquid reservoir (5), refrigeration magnetic valve (6), refrigeration expansion valve (7), evaporimeter (8) and gas-liquid separator (9), above-mentioned parts are connected with valve by pipeline successively, it is characterized in that:
Described condensation temperature is regulated refrigeration system and is comprised that also condensation temperature is regulated heat exchanger (4), condensation temperature is regulated magnetic valve (10a, 10b, 11a, 11b), bypass expansion valve (13), condensing pressure sensor (14) and controller (15); Described condensation temperature is regulated magnetic valve (10a, 10b, 11a, 11b, 12a, 12b) and is comprised condenser magnetic valve (10a, 10b), condensation temperature adjusting heat exchanger magnetic valve (11a, 11b) and bypass solenoid valve (12a, 12b);
Described condenser magnetic valve (10a, 10b) comprises condenser inlet magnetic valve (10a) and condensator outlet magnetic valve (10b), the outlet of condenser inlet magnetic valve (10a) is connected with the import of condenser (3), and the import of condensator outlet magnetic valve (10b) is connected with the outlet of condenser (3); Condensation temperature is regulated heat exchanger magnetic valve (11a, 11b) and is comprised that condensation temperature is regulated heat exchanger import magnetic valve (11a) and condensation temperature is regulated heat exchanger exit magnetic valve (11b), condensation temperature is regulated heat exchanger import magnetic valve (11a) outlet and is connected with the import of condensation temperature adjusting heat exchanger (4), and condensation temperature is regulated heat exchanger exit magnetic valve (11b) import and is connected with the outlet that condensation temperature is regulated heat exchanger (4); Bypass solenoid valve (12a, 12b) comprise bypass inlet magnetic valve (12a) and bypass outlet magnetic valve (12b), the outlet of bypass inlet magnetic valve (12a) is connected condensation temperature adjusting heat exchanger import magnetic valve (11a) and exports on the pipeline that is connected with the import of condensation temperature adjusting heat exchanger (4), the import of bypass outlet magnetic valve (12b) is connected the import of condensation temperature adjusting heat exchanger exit magnetic valve (11b) and exports on the pipeline that is connected with condensation temperature adjusting heat exchanger (4), the import of bypass inlet magnetic valve (12a) and bypass expansion valve (13) are connected in series, and the outlet of bypass outlet magnetic valve (12b) is connected on the connecting line of evaporimeter (8) and gas-liquid separator (9);
Described liquid reservoir (5) outlet is divided into two-way, and one the tunnel is connected with the import of the magnetic valve (6) that freezes, and another road is connected with bypass expansion valve (13) import;
Described oil eliminator (2) export pipeline is divided into two-way behind one section main pipe rail, one the tunnel is connected with the import of condenser inlet magnetic valve (10a), the import that another road and condensation temperature are regulated heat exchanger import magnetic valve (11a) is connected, and it is one the tunnel to enter the mouth with liquid reservoir (5) and to be connected that the outlet that the outlet of condensator outlet magnetic valve (10b) and condensation temperature are regulated heat exchanger exit magnetic valve (11b) gathers; The installation direction of condenser fan blows to condenser (3) for making air-out direction regulate heat exchanger (4) by condensation temperature;
Described condensing pressure sensor (14) is installed on the main pipe rail of oil eliminator (2) export pipeline, condensing pressure sensor (14) is by line connecting controller (15), and controller (15) is connected with the control circuit that refrigeration magnetic valve (6) and condensation temperature are regulated magnetic valve (10a, 10b, 11a, 11b, 12a, 12b).
2. condensation temperature according to claim 1 is regulated refrigeration system, it is characterized in that described compressor (1) is constant volume compressor or variable conpacitance compressor.
3. condensation temperature according to claim 1 is regulated refrigeration system, it is characterized in that it is air-cooled heat exchanger that described condenser (3) and condensation temperature are regulated heat exchanger (4).
4. condensation temperature according to claim 1 is regulated refrigeration system, and the heat exchange area that it is characterized in that described condenser is 2 with the heat exchange area ratio that condensation temperature is regulated heat exchanger: 1-5: 1.
5. condensation temperature according to claim 1 is regulated refrigeration system, its control method is: when refrigeration system is out of service, all closed electromagnetic valves, when control system is transmitted signal to refrigeration magnetic valve (6), refrigeration magnetic valve (6) is opened, condenser magnetic valve (10a, 10b) and condensation temperature are regulated heat exchanger magnetic valve (11a, 11b) and are opened, and condenser (3) and condensation temperature are regulated heat exchanger (4) and all used as condenser; When environment temperature is crossed when low, condensing pressure sensor (14) judges that condensing pressure is low excessively, to transmit signal and give controller (15), after controller (15) is handled signal, new signal is passed to the control circuit of condenser magnetic valve (10a, 10b) and condensation temperature adjusting heat exchanger magnetic valve (11a, 11b), when condensing pressure is not lower than the setting minimum, condensation temperature is regulated heat exchanger magnetic valve (11a, 11b) closes, when condensing pressure was lower than the setting minimum, (10a, 10b) closed with the condenser magnetic valve; When environment temperature raises, condensing pressure sensor (14) is judged the condensing pressure height, transmit signal and give controller, after controller is handled signal, open condenser magnetic valve (10a, 10b), close condensation temperature simultaneously and regulate heat exchanger magnetic valve (11a, 11b), or condenser magnetic valve (10a, 10b) and condensation temperature adjusting heat exchanger magnetic valve (11a, 11b) are all opened; At condenser magnetic valve (10a, 10b) regulate heat exchanger magnetic valve (11a with condensation temperature, under the situation about 11b) all opening, condensing pressure sensor (14) is judged that still condensing pressure is too high and is transmitted signal and give controller (15), controller this moment (15) transmits signal and regulates heat exchanger magnetic valve (11a to condensation temperature, 11b) and bypass solenoid valve (12a, control circuit 12b), condensation temperature is regulated heat exchanger magnetic valve (11a, 11b) close, with bypass solenoid valve (12a, 12b) open, this moment, condensation temperature was regulated the temperature of heat exchanger (4) inner refrigerant far below environment temperature, regulate heat exchanger (4) by condensation temperature and reduce condenser (3) EAT, thereby reduce condensation temperature.
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| CN102889706A (en) * | 2012-10-22 | 2013-01-23 | 合肥天鹅制冷科技有限公司 | Compression refrigeration condensation system with low-temperature startup and low-temperature operation |
| CN102889643A (en) * | 2012-10-29 | 2013-01-23 | 江苏兆胜空调有限公司 | Air conditioner used for cars and ships in ultralow temperature environment and controlling method thereof |
| WO2013145006A1 (en) * | 2012-03-29 | 2013-10-03 | 三菱電機株式会社 | Air conditioning device |
| CN103697642A (en) * | 2013-12-31 | 2014-04-02 | 上海爱控自动化设备有限公司 | Automatic control method and system for energy-saving refrigeration of condenser |
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| CN104501440A (en) * | 2015-01-14 | 2015-04-08 | 合肥天鹅制冷科技有限公司 | Cooling liquid forced air cooling regulation system |
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