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Refrigeration device

一种制冷装置、制冷剂的技术，应用在制冷机、制冷组件、制冷和液化等方向，能够解决制冷剂起火等问题

Active Publication Date: 2020-05-26
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the flammability of the above-mentioned refrigerants is low, if the refrigerant leaks into a closed space, the leaked refrigerant may catch fire

Method used

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  • Refrigeration device
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Examples

Experimental program
Comparison scheme
Effect test

no. 1 approach

[0058] The first embodiment will be described. This embodiment is an air conditioner 10 constituted by a refrigeration device.

[0059] -Construction of air conditioner-

[0060] Such as figure 1 As shown, the air conditioner 10 of this embodiment includes one outdoor unit 15 and a plurality of indoor units 20 . It should be noted, figure 1 The number of outdoor units 15 and the number of indoor units 20 shown are just examples. In other words, the air conditioner 10 may be provided with a plurality of outdoor units 15 , or may be provided with one or more than three indoor units 20 .

[0061]

[0062] The outdoor unit 15 constitutes a heat source side unit. The outdoor unit 15 is provided with an outdoor circuit 40 , an outdoor fan 16 , and an outdoor controller 80 . The outdoor fan 16 constitutes a heat source side fan and supplies outdoor air to an outdoor heat exchanger 43 described later. The outdoor circuit 40 and the outdoor controller 80 will be described later....

no. 2 approach

[0122] A second embodiment will be described. The air conditioner 10 of the present embodiment is obtained by changing the configuration of the outdoor circuit 40 in addition to the air conditioner 10 of the first embodiment. Here, differences between the air conditioner 10 of the present embodiment and the air conditioner 10 of the first embodiment will be described.

[0123] Such as Figure 4 As shown, in the air conditioner 10 of the present embodiment, the liquid reservoir 57 and the bypass switching valve 58 are provided on the liquid side bypass pipe 50 of the outdoor circuit 40 . The liquid reservoir 57 is arranged in the part of the liquid side bypass pipe 50 in this embodiment closer to the liquid side pipe 47 than the liquid side bypass valve 51, and the bypass switch valve 58 is arranged in the liquid side bypass pipe 50 in this embodiment The part closer to the liquid side pipe 47 than the liquid reservoir 57. The accumulator 57 constitutes a container part for ...

no. 3 approach

[0128] A third embodiment will be described. The air conditioner 10 of the present embodiment is obtained by changing the configuration of the outdoor circuit 40 in addition to the air conditioner 10 of the second embodiment. Here, differences between the air conditioner 10 of the present embodiment and the air conditioner 10 of the second embodiment will be described.

[0129] Such as Figure 5 As shown, in the air conditioner 10 of the present embodiment, the gas side on-off valve 56 is provided on the liquid side bypass pipe 48 of the outdoor circuit 40 . In the gas-side pipe 48 , the gas-side on-off valve 56 is arranged closer to the gas-side normally closed valve 46 than the connecting portion of the liquid-side bypass pipe 50 and the gas-side bypass pipe 52 on the gas-side pipe 48 . The air-side switching valve 56 is an openable and closable solenoid valve, and constitutes an air-side control valve.

[0130] In the present embodiment, the normal control unit 85 of the...

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Abstract

A liquid-side pipe (47) of an outdoor circuit (40) is provided with an outdoor expansion valve (44). Furthermore, the outdoor circuit (40) is provided with a liquid-side bypass pipe (50) for having the liquid-side pipe (47) in communication with the intake side of a compressor (41). When an outdoor controller (80) receives a signal indicating that a refrigerant has leaked from an indoor circuit (60), the outdoor controller performs refrigerant recovery control operations for operating the compressor (41) in a state wherein the liquid-side control valve (44) is closed, and also performs, in therefrigerant recovery control operations, valve control operations for opening a liquid-side bypass valve (51) of the liquid-side bypass pipe (50). As a result, the refrigerant can be recovered from ause-side circuit to a heat source-side circuit, while preventing the compressor from being damaged, and the leakage amount of the refrigerant from the use-side circuit can be reduced.

Description

technical field [0001] The present invention relates to a refrigeration device that performs a refrigeration cycle by circulating a refrigerant in a refrigerant circuit. Background technique [0002] Conventionally, there is known a refrigeration device that performs a refrigeration cycle by circulating a refrigerant in a refrigerant circuit. Patent Document 1 discloses such a refrigeration device, that is, a split-type air conditioner. [0003] Corrosion occurs in pipes constituting the refrigerant circuit or heat transfer tubes constituting the heat exchanger depending on the installation conditions of the refrigeration system. Sometimes, due to corrosion, holes develop in the pipes or heat transfer tubes through which the refrigerant can leak out. [0004] So-called Freon refrigerants are widely used as refrigerants for refrigeration cycles. Most Freon refrigerants have a high global warming potential (GWP: Global Warming Potential). Therefore, from the viewpoint of s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02F25B1/00
CPCF25B49/02F25B2400/12F25B2500/222F25B2500/221F25B2400/19F25B13/00F25B2313/0233F25B2313/02741F25B49/005F25B2700/21151F25B2700/21152F25B2700/1933F25B2700/1931F25B2400/0401F25B2600/2501F25B41/20F25B2400/0409F25B2313/02521F25B1/00F24F11/36F24F11/84F25B41/24
Inventor 矢嶋龍三郎
Owner DAIKIN IND LTD
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