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Heat source unit

A heat source unit and heat exchanger technology, applied in the field of heat source units, can solve problems such as ignition, and achieve the effect of improving reliability

Active Publication Date: 2016-03-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In such a heat source unit, if the flammable refrigerant leaks, it will stagnate from the lower part of the housing, and there is a danger of the refrigerant coming into contact with the control circuit in the control box installed in the housing and catching fire.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0028] figure 1 It is a refrigerant circuit diagram of the air-conditioning apparatus including the heat source unit 100 according to Embodiment 1 of the present invention.

[0029] The air conditioner includes a compressor 1, a four-way valve 2 that switches the flow direction of refrigerant according to heating and cooling, a heat source side heat exchanger 3, an expansion valve 4, and a load side heat exchanger 5, and includes these Refrigerant circuits partially connected by piping. In addition, the air conditioner includes a blower 6 for passing air through the heat source side heat exchanger 3 to promote heat exchange between the air and the refrigerant in the heat source side heat exchanger 3 .

[0030] The compressor 1 compresses the sucked refrigerant into a state of high temperature and high pressure.

[0031] The heat source side heat exchanger 3 and the load side heat exchanger 5 exchange heat between the refrigerant and the air, and are air heat exchangers with...

Embodiment approach 2

[0097] Embodiment 2 is different from Embodiment 1 in the arrangement position of the control box 13 and the blower control based on the difference in the arrangement position. Other than that, the configuration, operation, etc. of the refrigerant circuit are the same as those of the first embodiment. In addition, for the following Figure 7 ~ Figure 9 Components that are the same as those in Embodiment 1 are assigned the same reference numerals as in Embodiment 1, and detailed description thereof will be omitted. Note that modifications applied to the same components as those in the first embodiment are also similarly applied in the second embodiment.

[0098] Figure 7 It is a figure which shows the heat source unit 100 of Embodiment 2 of this invention, Figure 7 (a) is the front view, Figure 7 (b) is the rear view, Figure 7 (c) is a sectional view, Figure 7 (d) is a plan view. Figure 8 yes means Figure 7 A diagram of the control box 13. Figure 8 The arrows i...

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Abstract

A heat source unit comprises: a housing (100a) provided with a machine chamber (12) which houses a compressor (1) and an expansion valve (4) and in which a ventilation opening (7) for enabling ventilation with outside air is formed, the housing (100a) being also provided with a heat exchange chamber (11) which houses a heat source heat exchanger (3) and also houses a blower (6) which causes air to flow through the heat source heat exchanger (3); a control box (13) disposed within the housing (100a) at a position where an air current generated by the blower (6) passes; a refrigerant concentration detection means (14) disposed within the control box (13) and detecting the concentration of a refrigerant; and a control circuit (15) disposed within the control box (13) and controlling the blower (6). Upon detecting the leakage of the refrigerant on the basis of a value detected by the refrigerant concentration detection means (14), the control circuit (15) controls the blower (6) so that the volume of air flowing through the control circuit (15) is the maximum volume of air which the blower (6) can cause to flow through the control box (15).

Description

technical field [0001] The present invention relates to a heat source unit suitable for use in multi-type air conditioners for buildings and the like, for example. Background technique [0002] Conventionally, there is a heat source unit that includes a compressor, a heat exchanger, a blower, and a control box in a housing and uses a flammable refrigerant that is denser than air. In such a heat source unit, if the flammable refrigerant leaks, it will stagnate from the lower part of the casing, and the refrigerant may come into contact with a control circuit in a control box provided in the casing and cause fire. In order to avoid this situation, there is the following technology: install a refrigerant leakage detection mechanism in the frame, and when refrigerant leakage is detected, the blower is reversely rotated to suck the air outside the frame into the frame to increase the pressure inside the frame, to discharge the refrigerant stagnated in the frame to the outside of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F25B49/02F24F1/22
CPCF24F1/22F24F1/54F25B13/00F25B49/005F25B49/02F25B2313/0294F25B2400/12F25B2500/222F24F11/36F24F11/77Y02B30/70
Inventor 伊藤正纮野本宗伊藤拓也大越靖
Owner MITSUBISHI ELECTRIC CORP
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