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Air conditioning device

A technology for air-conditioning devices and spaces, which is applied to air-conditioning systems, space heating and ventilation, heating methods, etc., can solve the problems of rising manufacturing costs and the formation of flammable concentration areas of flammable refrigerants, and achieve the effect of suppressing manufacturing costs.

Active Publication Date: 2016-02-03
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0010] However, in the air conditioner described in Patent Document 1, a gas sensor for detecting flammable refrigerant gas is required, so there is a first problem of increasing the manufacturing cost.
In addition, although the user who has learned of the leakage of flammable refrigerant through the alarm can take measures such as ventilating the room and calling maintenance personnel for repairs, there is a second problem: until the above-mentioned measures are taken, generally in the As a closed space, the leaked flammable refrigerant may form a flammable concentration area
In addition, since the control unit that determines that the flammable refrigerant has leaked immediately performs control to stop the operation of the refrigerant circuit, it is possible to suppress a large amount of flammable refrigerant from leaking, but a certain amount of flammable refrigerant cannot be avoided.
Therefore, there is a third problem: generally in a room as a closed space, the leaked flammable refrigerant may form a flammable concentration area
However, during the stop of the air conditioner, since the fan of the indoor unit is also stopped, the above-mentioned second or third problem is likely to occur.

Method used

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Experimental program
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Effect test

Embodiment approach 1

[0053] The air conditioner of Embodiment 1 of this invention is demonstrated. figure 1 It is a refrigerant circuit diagram showing a schematic configuration of the air conditioner of the present embodiment. Additionally, include figure 1 In the following drawings, the dimensional relationship, shape, etc. of each component may be different from the actual ones.

[0054] Such as figure 1 As shown, the air conditioner has a refrigeration cycle 40 that circulates a refrigerant. The refrigeration cycle 40 has a structure in which a compressor 3 , a refrigerant flow switching device 4 , an outdoor heat exchanger 5 (heat source side heat exchanger), a pressure reducing device 6 , and an indoor heat exchanger are sequentially connected via refrigerant piping. 7 (load side heat exchanger) is connected in a ring. In addition, the air conditioner has, for example, an indoor unit 1 installed indoors, and an outdoor unit 2 installed outdoors, for example. The indoor unit 1 and the ou...

Embodiment approach 2

[0084] An air conditioner according to Embodiment 2 of the present invention will be described. Figure 8 It is a front view schematically showing the internal structure of the indoor unit 1 of the air conditioner of this embodiment. Figure 9 It is a side view schematically showing the internal structure of the indoor unit 1 . Components having the same functions and actions as those in Embodiment 1 are assigned the same reference numerals and their descriptions are omitted.

[0085] Such as Figure 8 as well as Figure 9 As shown, in part of the partition 20 near the indoor pipes 9a, 9b and the extension pipes 10a, 10b, a container-shaped recess 130 is formed in which the upper space 115b side is recessed and the lower space 115a side protrudes. The space in the recess 130 is part of the upper space 115b, but is lower than the upper end of the first front panel 114a (the lower end of the second front panel 114b). An opening is formed on the front side of the recess 130 ,...

Embodiment approach 3

[0096] An air conditioner according to Embodiment 3 of the present invention will be described. In Embodiment 1 or 2 described above, opening holes through which extension pipes 10 a and 10 b pass are provided in frame body 111 , partition portion 20 (including recessed portion 130 ), bulging portion 132 , and the like. For example, in image 3 In the shown structure, the extension pipes 10a, 10b are made to pass through the opening hole provided in the partition part 20 and the opening hole provided in the frame body 111, thereby being taken out from the inside of the frame body 111 to the outside of the frame body 111, and connected to the outdoor unit 2. connect.

[0097] Figure 16 It is a figure which shows the structure of the opening hole of the air-conditioning apparatus of this embodiment. Figure 16 The opening holes 30a and 30b shown are of a double-hole type, and the extension pipes 10a and 10b can pass through independently. Such as Figure 16 As shown, heat ...

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PUM

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Abstract

The invention provides an air conditioning device which can restrain refrigerant local concentration rising in a room in case of refrigerant leakage and reduce production cost. Provided is an air conditioning device having a refrigeration cycle (40), an outdoor unit (2), and an indoor unit (1). The refrigerant has a density greater than that of the air under atmospheric pressure. The indoor unit (1) is provided with: an upper space (115b) in which an indoor heat exchanger (7) is disposed; a lower space (115a) provided lower than the upper space (115b); a partition part (20) that partitions the upper space (115b) and the lower space (115a); an indoor blower fan (7f) disposed in the lower space (115a); and a fan casing (108) in which a blow-out opening part(108a) and a suction opening part(108b) are formed. An air passage opening part (20a) that serves as an air passage between the upper space (115b) and the lower space (115a) is formed in the partitioning part (20). The blow-out opening part (108a) is connected to the air passage opening part (20a).

Description

technical field [0001] The present invention relates to air conditioners. Background technique [0002] Conventionally, an HFC refrigerant such as nonflammable R410A has been used as a refrigerant used in an air conditioner. Unlike conventional HCFC refrigerants such as R22, this R410A has an ozone depletion potential (hereinafter referred to as "ODP") of zero and therefore does not deplete the ozone layer. However, R410A has a high global warming potential (hereinafter referred to as "GWP"). Therefore, as part of the prevention of global warming, studies on switching from high-GWP HFC refrigerants such as R410A to low-GWP refrigerants have been advanced. [0003] As a candidate for such a low-GWP refrigerant, there is R290 (C 3 h 8 : propane), R1270 (C 3 h 6 : HC refrigerant like propylene). However, R290 and R1270 have flammability (strong flammability) of a strong flammability level, unlike non-flammable R410A. Therefore, in the case of using R290 or R1270 as the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F1/00
CPCF24F1/0003F24F1/0007F24F1/005F24F1/0059F24F1/26F24F1/32F24F13/20F25B13/00F25B2400/12
Inventor 铃木康巨驹井隆雄前田晃川岛充久保和也
Owner MITSUBISHI ELECTRIC CORP