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Refrigeration and air conditioning devices and control devices

An air-conditioning device and control device technology, which is applied in the direction of refrigerators, refrigeration components, refrigeration and liquefaction, etc., and can solve problems such as the location where refrigerant leakage occurs

Active Publication Date: 2021-06-25
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The detection of refrigerant leakage disclosed in Patent Document 1 is to detect whether there is insufficient refrigerant in the entire refrigeration cycle based on the change of the state quantity, and it is not sure where the refrigerant leakage occurs

Method used

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  • Refrigeration and air conditioning devices and control devices
  • Refrigeration and air conditioning devices and control devices
  • Refrigeration and air conditioning devices and control devices

Examples

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Embodiment approach 1

[0015] The refrigerating and air-conditioning apparatus according to Embodiment 1 will be described with reference to the drawings. figure 1 It is a refrigerant circuit diagram showing an example of the refrigerating and air-conditioning apparatus according to Embodiment 1 of the present invention. The refrigerating and air-conditioning apparatus 100 of Embodiment 1 is, for example, an apparatus for cooling a cooling object such as a refrigerator. Such as figure 1 As shown, the refrigerating and air-conditioning apparatus 100 has a refrigerant circuit 10 , a condensation temperature sensor 21 , an expansion portion inlet temperature sensor 22 , an inflow pressure sensor 23 , an inflow temperature sensor 24 , and a control device 50 . The refrigerant circuit 10 is a non-azeotropic circuit formed by connecting the compressor 11, the condenser 12, the expansion part 13, the evaporator 14, the accumulator 15, and the liquid receiver 16 with piping, and mixing various refrigerants...

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PUM

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Abstract

The invention relates to a refrigerating and air-conditioning device and a control device. The refrigerating and air-conditioning device has: a refrigerant circuit, which connects a compressor, a condenser, an expansion part, an evaporator, and an accumulator with piping for circulation of non-azeotropic mixed refrigerant; the inflow temperature A sensor for measuring the temperature of the zeotropic refrigerant mixture flowing into the evaporator; and a control device for controlling the inspection mode of the refrigerant circuit so that the pressure of the zeotropic refrigerant mixture flowing into the evaporator becomes a set pressure , calculate the temperature difference between the saturation temperature at the set pressure and the temperature measured by the inflow temperature sensor, compare the temperature difference with the threshold value, and determine whether there is leakage of the non-azeotropic refrigerant mixture.

Description

technical field [0001] The present invention relates to a control device for determining the presence or absence of refrigerant leakage from a refrigerant circuit, and a refrigerating and air-conditioning apparatus provided with the control device. Background technique [0002] Patent Document 1 discloses an example of refrigerant leakage detection performed by a conventional air conditioner. Patent Document 1 describes that assuming that the amount of refrigerant in the refrigeration circuit is the required amount, the state in which the difference between the state quantity in the theoretical refrigeration cycle obtained from the heat load and the actually measured state quantity is a predetermined value or more continues. When a certain period of time elapses, it is judged that the refrigerant is insufficient. Patent Document 1 discloses the evaporator inlet temperature as a specific example of the state quantity. [0003] Patent Document 1: Japanese Patent Application ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B49/02F25B1/00
CPCF25B1/00F25B49/02
Inventor 中川昌彦七种哲二
Owner MITSUBISHI ELECTRIC CORP