A control method for a cascade ultra-low temperature refrigerator

A technology for ultra-low temperature refrigerators and control methods, which is applied in the control field of cascade ultra-low temperature refrigerators, and can solve problems such as unit shock, poor refrigeration effect, poor safety and reliability of refrigeration systems, etc., and achieve the effect of improving refrigeration capacity

Active Publication Date: 2021-09-14
冰山松洋生物科技(大连)有限公司
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  • Description
  • Claims
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Problems solved by technology

Defects of the current existing technology: the condensing fan rotates frequently after power-on, which causes a waste of electric energy; when controlling the high- and low-temperature compressors, the high-temperature compressor has not yet reached the best condensation effect, and when the low-temperature system is condensed , the low-temperature compressor starts, which causes poor cooling effect and wastes electric energy; if the high-temperature and low-temperature compressors stop at the same time, it will have an impact on the unit and cause a bad hidden danger to the safety and reliability of the refrigeration system

Method used

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  • A control method for a cascade ultra-low temperature refrigerator

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Embodiment Construction

[0013] In order to make the technical solutions and advantages of the present invention more clear, the technical solutions in the embodiments of the present invention are clearly and completely described below in conjunction with the drawings in the embodiments of the present invention:

[0014] A control method for a cascade ultra-low temperature refrigerator, which can be used in practical applications with figure 1 The shown devices work together, specifically including the following steps:

[0015] S1: firstly adopt the temperature sensor to detect the real-time temperature T in the refrigerator, and then send it to the refrigeration unit in the refrigerator;

[0016] S2: Set the temperature setting value, temperature control upper deviation and temperature control lower deviation in the refrigeration unit of the refrigerator, the minimum working time of the high-temperature compressor of the second-stage refrigeration, and when the temperature of the condenser does not r...

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Abstract

The invention discloses a control method for a cascade ultra-low temperature refrigerator, which includes: detecting the real-time temperature T in the refrigerator; The real-time temperature T controls the start and stop of the high-temperature compressor and the low-temperature compressor in the refrigerator, so that the real-time temperature T in the refrigerator reaches the set value of the temperature in the box; when the following conditions are met at the same time, the low-temperature compressor is started: the high-temperature compressor has been started and the working time is long ≥The shortest working time of the high-temperature compressor for the second-stage refrigeration; the real-time temperature value of the high-temperature evaporator ≤ the minimum temperature value of the high-temperature evaporator when the low-temperature compressor is turned on; the real-time temperature T of the refrigerator ≥ the set value of the temperature in the box + the upper deviation of the low-temperature compressor .

Description

technical field [0001] The invention relates to the field of refrigerator control, in particular to a method for controlling a cascade ultra-low temperature refrigerator. Background technique [0002] The control method usually adopted in the field of refrigerator refrigeration is: after the power is turned on, the condensing fan rotates normally and after the compressor start-up delay, when the temperature detection value in the box is > St + the upper deviation of the start-up low-temperature compressor, the high-temperature compressor is turned on, and the delay Turn on the low-temperature compressor after 30 seconds; when the temperature detection value in the box is <St-turn off the lower deviation of the low-temperature compressor, then turn off the high-temperature and low-temperature compressors at the same time. Defects of the current existing technology: after power on, the condensing fan rotates constantly, which causes a waste of electric energy; when contr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25D29/00F25D11/04F25D19/04F25B7/00F25B49/02
CPCF25B7/00F25B49/02F25D11/04F25D19/04F25D29/001F25D29/003F25D2600/06
Inventor 刘发柱于吉帅龙霄飞姚金龙
Owner 冰山松洋生物科技(大连)有限公司
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