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Refrigeration cycle device

A technology of refrigeration cycle and refrigerant, which is applied in refrigerators, refrigeration components, refrigeration and liquefaction, etc., and can solve problems such as inability to supply oil due to differential pressure of compressors, wear of compressor bearings or sliding parts, and performance degradation of compressors, etc.

Active Publication Date: 2022-07-15
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the conventional refrigeration cycle apparatus, when the above-mentioned ratio is lowered, the differential pressure oil supply to the compressor cannot be properly performed, and thus the bearings and sliding parts of the compressor may be worn out.
Abrasion of the bearings or sliding parts of the compressor degrades the performance of the compressor, resulting in damage to the compressor

Method used

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  • Refrigeration cycle device
  • Refrigeration cycle device
  • Refrigeration cycle device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0018] figure 1 It is a figure which shows the structure of the refrigeration cycle apparatus 1 of Embodiment 1. The refrigeration cycle apparatus 1 is, for example, an air conditioner that performs indoor air conditioning as an air conditioning target, and includes a load side unit 10 and a heat source side unit 20 . The load-side unit 10 is, for example, an indoor unit arranged indoors. The heat source side unit 20 is, for example, an outdoor unit installed outdoors.

[0019] The load-side unit 10 includes a load-side heat exchanger 11 that exchanges heat between the refrigerant and indoor air, and a load-side blower 12 that sends the indoor air to the load-side heat exchanger 11 . An example of the load-side blower 12 is a fan.

[0020] The heat source side unit 20 has a compressor 21 that compresses a refrigerant to bring the refrigerant into a relatively high temperature and high pressure state. For example, the compressor 21 is a variable-capacity compressor. In Emb...

Embodiment approach 2

[0052] The structure of the refrigeration cycle apparatus of Embodiment 2 is the same as that of the refrigeration cycle apparatus 1 of Embodiment 1. However, the function of the control device 24 of the second embodiment is different from the function of the control device 24 of the first embodiment. In Embodiment 2, differences from Embodiment 1 will be mainly described. Figure 5 It is a graph for explaining the operation of the compressor 21 included in the refrigeration cycle apparatus 1 of the second embodiment. for in Figure 5 neutral image 3 Included parts with the same part callout as image 3 The reference numbers are the same as the reference numbers. for in Figure 5 neutral image 3 The description of the components that are included in the same components is omitted.

[0053] exist Figure 5 In the graph of , a frequency control region 40 is provided inside the operating range 33 . The frequency control area 40 is in image 3 is not shown in the graph...

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Abstract

A refrigeration cycle device (1) of the present invention includes: a compressor (21) that compresses refrigerant; a suction-side detector (22) that detects the pressure of the refrigerant sucked into the compressor (21); a discharge-side detector (22) 23), which detects the pressure of the refrigerant discharged from the compressor (21); a control device (24), which has the second pressure value detected by the discharge side detector (23) and the second pressure value detected by the suction side detector (22) ) when the ratio of the detected first pressure value is not between the preset upper limit and the preset lower limit, the function of controlling the compressor (21) so that the ratio converges between the upper limit and the lower limit .

Description

technical field [0001] The present invention relates to a refrigeration cycle apparatus used in, for example, an air conditioner. Background technique [0002] Conventionally, there is known a refrigeration cycle apparatus that controls the compressor based on the ratio of the pressure of the refrigerant discharged from the compressor to the pressure of the refrigerant sucked into the compressor (for example, see Patent Document 1). The conventional refrigeration cycle apparatus protects the compressor by forcibly reducing the operating frequency of the compressor when the above-mentioned ratio is equal to or greater than the set value. [0003] Patent Document 1: Japanese Patent Application Laid-Open No. 4-273949 [0004] However, in the conventional refrigeration cycle apparatus, when the above-mentioned ratio is lowered, the differential pressure oil cannot be properly supplied to the compressor, and there is a possibility that the bearing and sliding portion of the comp...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F25B1/00
CPCF25B49/022F25B13/00F25B2700/1931F25B2700/1933F25B2500/19F25B2600/021F25B2600/0253F25B2600/0251F25B2600/027
Inventor 松尾刚富田雅史酒井瑞朗
Owner MITSUBISHI ELECTRIC CORP