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Energy-saving type refrigerating system and control method thereof

A refrigeration system and energy-saving technology, applied in the field of energy-saving refrigeration system and its control, can solve the problems of unstable operation of the system and frosting of the evaporator, achieve more accurate and stable temperature control, reduce the output of cold and heat, and avoid serious contamination. frost effect

Inactive Publication Date: 2017-12-15
广州赛普里仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is that the system cannot run stably, and the evaporator may be severely frosted

Method used

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  • Energy-saving type refrigerating system and control method thereof

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Effect test

Embodiment 1

[0018] An energy-saving refrigeration system, comprising an evaporator 1, a compressor 2, a condenser 3, and an electronic expansion valve 4 in a refrigeration main circuit connected end-to-end through refrigerant pipelines; wherein, the evaporator 1 is used to evaporate cold amount to lower the space temperature; the compressor 2 plays the role of compressing the refrigerant, consumes electric energy, and generates cooling capacity; the condenser 3 is used to cool the high-temperature and high-pressure refrigerant.

[0019] The energy-saving refrigeration system also includes a control unit 5, an electronic expansion valve 41 of the refrigeration cold bypass circuit and an electronic expansion valve 42 of the refrigeration hot bypass circuit; the control unit 5 is respectively connected to the sensor group and the electronic expansion valve 4 of the refrigeration main circuit through wires , the electronic expansion valve 41 of the refrigerating and cold bypass circuit and the...

Embodiment 2

[0022] Described sensor group comprises refrigerating system sensor and temperature sensor 6 in the box, and described refrigerating system sensor comprises refrigerating system pressure sensor and refrigerating system temperature sensor, is used for measuring the pressure and temperature of refrigerating system; In a closed space for refrigeration, it is used to read the temperature inside the box at any time.

[0023] The control unit 5 includes a control chip and a storage device; the condenser 3 is provided with a cooling fan 31, and the cooling fan 31 generates wind speed to help the condenser dissipate heat.

[0024] Other structures of this embodiment are the same as those of Embodiment 1.

Embodiment 3

[0026] A control method for an energy-saving refrigeration system, the steps of which include: the control unit 5 reads the temperature in the box and the pressure and temperature data of the refrigeration system through the sensor group, calculates the cooling capacity demand according to the temperature in the box, and then the control unit calculates The openings of the electronic expansion valve 4 of the refrigeration main circuit, the electronic expansion valve 41 of the refrigeration cold bypass circuit and the electronic expansion valve 42 of the refrigeration heat bypass circuit are controlled to adjust the cooling output of the refrigeration system and greatly reduce the Cooling and heating output to achieve energy saving; the reduction of cooling capacity can also avoid severe frosting of evaporator 1, so that the refrigeration system can run stably for a long time, and reduce the risk of liquid shock in the compressor.

[0027] The control method in embodiment 3 can ...

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Abstract

The invention relates to the field of refrigerating, in particular to an energy-saving type refrigerating system and a control method thereof. The energy-saving type refrigerating system comprises an evaporator, a compressor, a condenser and a refrigerating main loop electronic expansion valve all of which are sequentially connected through a refrigerant pipeline in an end-to-end manner to form a loop. The control method comprises the steps that a control unit reads the temperature inside a box and the pressure and temperature data of the refrigerating system through a sensor set, the cold capacity demand is worked out according to the temperature inside the box, and then the control unit works out the opening degree of the refrigerating main loop electronic expansion valve, the opening degree of a refrigerating cold side loop electronic expansion valve and a refrigerating hot side loop electronic expansion valve; and meanwhile, the multiple electronic expansion valves serve as throttling devices, the refrigerating capacity is controlled more precisely through the control unit, by means of the adjustment on the cold capacity, the output of the cold capacity is reduced, the energy-saving purpose is achieved, and the temperature control is more precise and stable, and serious frosting of the evaporator is avoided.

Description

【Technical field】 [0001] The invention relates to the refrigeration field, in particular to an energy-saving refrigeration system and a control method thereof. 【Background technique】 [0002] With the popularization of environmental protection education, consumers pay more and more attention to the energy-saving performance of refrigeration systems. Most of the refrigeration systems on the market now use throttling structures to adjust the amount of refrigerant entering the evaporator. However, due to the lack of temperature monitoring and feedback mechanisms, it is difficult to Precise control of the cooling capacity has problems such as poor energy saving effect and inaccurate temperature control. When the cooling capacity is too large, it is easy to cause severe frosting of the evaporator, affect the stable operation of the refrigeration system, and increase the risk of liquid shock in the compressor. 【Content of invention】 [0003] The technical problem to be solved by...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B41/00F25B41/06F25B49/00F25B41/34F25B41/40
CPCF25B41/00F25B49/00F25B41/31Y02B30/70
Inventor 罗亦坤徐伟权
Owner 广州赛普里仪器有限公司
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