Heat pump device and method for controlling heat pump device

A technology of a heat pump device, a leak detection device, applied in the field of safety, capable of solving problems such as refrigerant heat exchanger or piping leakage, fire, etc.

Active Publication Date: 2014-05-14
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these refrigerants are all flammable refrigerants, which are different from conventionally used refrigerants
[0004] In an air conditioner using a flammable refrigerant, the refrigerant leaks from the heat exchanger or piping that constitutes the refrigeration cycle, creating an explosive atmosphere in the room, which may cause accidents such as fire

Method used

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  • Heat pump device and method for controlling heat pump device
  • Heat pump device and method for controlling heat pump device
  • Heat pump device and method for controlling heat pump device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0033] figure 1 It is a block diagram of the air conditioner 100 of Embodiment 1. in addition, figure 1 In , the blank arrow indicates the flow direction of the wind, and the dotted arrow indicates the flow direction of the signal.

[0034] The air conditioner 100 has a refrigerant circuit 6 (first refrigerant circuit, primary side circuit), and the refrigerant circuit 6 is sequentially connected to a compressor 1 (first compressor), a four-way valve 2 , and a heat exchanger 3 (a first refrigerant circuit) via pipes. 1 heat exchanger), the expansion valve 4 (first expansion mechanism), and the intermediate heat exchanger 5 (first intermediate heat exchanger) are formed in an annular shape. In addition, the air conditioner 100 has a water circuit 10 (fluid circuit, secondary side circuit), and the water circuit 10 is sequentially connected to the intermediate heat exchanger 5, the pump 7, the valve 8a (first valve), and the heat exchanger 9 (load exchanger) through piping. H...

Embodiment approach 2

[0068] In Embodiment 2, the air conditioner 100 provided with several primary side circuits is demonstrated. In addition, although the air conditioner 100 which has two primary side circuits was demonstrated as an example here, the air conditioner 100 may have three or more primary side circuits.

[0069] Regarding the air conditioner 100 according to Embodiment 2, the same components as those of the air conditioner 100 according to Embodiment 1 are denoted by the same reference numerals.

[0070] Figure 5 It is a block diagram of the air conditioner 100 of Embodiment 2. In addition, in figure 1 In , the blank arrows indicate the direction of wind flow, and the dashed arrows indicate the direction of signal flow.

[0071] The air conditioner 100 has a refrigerant circuit 6a (first refrigerant circuit, primary side circuit), and the refrigerant circuit 6a is sequentially connected to a compressor 1a (first compressor), a four-way valve 2a, and a heat exchanger 3a (a first r...

Embodiment approach 3

[0105] In Embodiment 3, the arrangement of the intermediate heat exchangers 5 ( 5 a , 5 b ) in Embodiments 1 and 2 will be described. In addition, the air conditioner 100 of Embodiment 2 is demonstrated here as an example.

[0106] Figure 8 It is an exploded perspective view of a general plate heat exchanger.

[0107] Figure 9 to Figure 11 It is a figure which shows the arrangement|positioning of the intermediate heat exchanger 5a, 5b of Embodiment 3. exist Figure 9 to Figure 11In , solid arrows indicate the flow of refrigerant during the cooling operation, and dotted arrows indicate the flow of water. During the heating operation, the refrigerant flows in the direction opposite to that of the solid arrow. and, in Figure 9 to Figure 11 In , the up-down direction represents the vertical direction.

[0108] exist Figure 9 to Figure 11 In , it is assumed that the intermediate heat exchangers 5a, 5b are plate heat exchangers. Such as Figure 8 As shown, the plate he...

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PUM

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Abstract

In order to prevent the refrigerant in the primary-side circuit from leaking via the secondary-side circuit in a heat pump device that is equipped with a primary-side circuit on the heat source side and a secondary-side circuit on the load side and employs an indirect method, an air conditioner (100) is equipped with: a leakage detection device (13) that detects the leakage of refrigerant circulating in a refrigerant circuit (6), which is the primary-side circuit, from an intermediate heat exchanger (5) to a water circuit (10), which is the secondary-side circuit; and a control device (14) that, when the leakage detection device (13) detects leakage, closes valves (8a, 8b) provided on either side of the intermediate heat exchanger (5) in the water circuit (10), preventing the water in which refrigerant is mixed from flowing past the valves (8a, 8b).

Description

technical field [0001] The present invention relates to a technique for securing safety in the event of refrigerant leakage from a heat pump device. Background technique [0002] As a method of cooling, heating, or dehumidifying indoors, an air conditioner (an example of a heat pump device) using a refrigeration cycle technology using a refrigerant is known. [0003] In this air conditioner, a fluorine compound such as R410A which is an HFC (hydrofluorocarbon) is widely used as a refrigerant. However, since this refrigerant has a great influence on global warming, it is required to use a refrigerant that has a small effect on global warming from the viewpoint of preventing global warming. Therefore, it is proposed to use a refrigerant having a small influence on global warming, such as R32 as an HFC, R1234yf as an HFO (hydrofluoroolefin), isobutane or propane as a hydrocarbon, and the like. However, these refrigerants are all flammable refrigerants, and are different from ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02F24F11/02F25B1/00
CPCF25B49/02F24F1/26F25B13/00F25B39/00F25B2313/003F25B2400/06F25B2400/12F25B2500/18F25B2500/222F24F11/70F24F11/36F25B49/005F25B25/005
Inventor 冈崎多佳志
Owner MITSUBISHI ELECTRIC CORP
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