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Air-conditioning apparatus

A technology of air conditioning and heat medium, applied in space heating and ventilation details, climate sustainability, energy-saving heating/cooling, etc., can solve the problems of heat medium leakage detection, no consideration, etc.

Active Publication Date: 2012-02-29
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] However, the conventional air-conditioning apparatus that circulates the heat medium through the indoor unit has a problem in that the heat from the heat medium circulation circuit arranged near the room has a problem because the heat medium has little adverse effect on the user. Detection of media leaks, hardly considered

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0030] figure 1 and figure 2 It is an overall configuration diagram showing an example of the installation state of the air-conditioning apparatus according to Embodiment 1 of the present invention. based on figure 1 and figure 2 The structure of the air conditioning device will be described. This air conditioner performs a cooling operation or a heating operation using a refrigeration cycle (a refrigeration cycle and a heat medium circulation circuit) in which a refrigerant (a heat source side refrigerant and a heat medium (water, antifreeze, etc.)) circulates. Additionally, when including figure 1 In the following drawings, the relationship between the sizes of the components may be different from the actual situation.

[0031] Such as figure 1 As shown, the air conditioner has: one heat source device 1 as a heat source unit; multiple indoor units 2; and a relay unit 3 interposed between the heat source device 1 and the indoor units 2 . The relay unit 3 is used to exc...

Embodiment approach 2

[0148] In Embodiment 1, the leakage of the heat medium from the heating medium circulation circuit and the leakage of the heat medium from the cooling heat medium circulation circuit are detected in one process ( Figure 8 ). Not limited to this, the leakage of the heat medium from the heating medium circulation circuit and the leakage of the heat medium from the cooling heat medium circulation circuit may be detected through other steps. In addition, in this Embodiment 2, about the item which is not demonstrated especially, it is the same as Embodiment 1, and about the same function and structure, it demonstrates using the same code|symbol.

[0149] Figure 9 and Figure 10 It is a flowchart showing an example of a heat medium leakage detection method according to Embodiment 2 of the present invention. Figure 9 It is a flowchart showing the detection method of the heat leak from the heat source circulation circuit for heating. Figure 10 It is a flowchart showing a detec...

Embodiment approach 3

[0164] In Embodiment 1 and Embodiment 2, the leakage of the heat medium from the heat medium circuit is detected based on the temperature of the heat medium circulating in the heat medium circuit. Not limited thereto, the leakage of the heat medium from the heat medium circulation circuit may be detected based on the current value of the pump 21 . In this Embodiment 3, items not particularly described are the same as Embodiment 1 or Embodiment 2, and the same functions and configurations are described using the same reference numerals.

[0165] Figure 11 It is a schematic circuit diagram showing the structure of the air-conditioning apparatus in Embodiment 3 of this invention. Such as Figure 11 As shown, the first pump 21a installed on the heating medium circulation circuit is provided with a current detection unit that detects the current flowing in the first pump 21a (more specifically, the motor of the first pump 21a). 75a. In addition, the second pump 21b provided on...

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Abstract

Provided is an air-conditioning apparatus (100) comprising at least one intermediate heat exchanger (15) for exchanging the heat between a two-phase changing coolant or a supercritical-state coolant and a heating medium such as water or an antifreeze liquid different from the coolant. Further comprised are a refrigerating cycle circuit, in which a compressor (10), a heat-source side heat exchanger (12), at least one expansion valve (16) and a coolant-side passage of the intermediate heat exchanger (15) are connected via pipes for the coolant to flow therethrough, and a heating-medium circulating circuit, in which a heating medium-side passage of the intermediate heat exchanger (15), a pump (21) and a user-side heat exchanger (26) are connected via pipes for the heating medium to flow therethrough. The heating-medium circulating circuit is equipped with a fourth temperature sensor (34) for detecting the temperature of the heating medium flowing out from the user-side heat exchanger (26), so that the leakage of the heating medium from the heating-medium circulating circuit is detected on the basis of the change in the detected temperature of the fourth temperature sensor (34).

Description

technical field [0001] The invention relates to an air conditioning device suitable for multi-connected air conditioners and the like used in high-rise buildings. Background technique [0002] Conventionally, there is a multi-type air conditioner for a high-rise building that uses an air-conditioning apparatus that circulates refrigerant between an outdoor unit that is a heat source unit disposed outdoors and an indoor unit disposed indoors, and sends refrigerant to the indoor unit. Cooling energy or heating energy is sent to an air-conditioned area such as a room to perform cooling or heating operation. As refrigerants used in such air conditioners, HFC refrigerants are often used, for example. In addition, in recent years, carbon dioxide (CO 2 ) and other natural refrigerants. [0003] In addition, there are air-conditioning apparatuses of other configurations typified by cooling systems. In this air conditioner, cold energy or heat energy is generated in the heat sour...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24F11/02
CPCF25B25/005F25B49/005F25B2309/061F25B2313/0272F25B2313/02741F25B2500/222F24D3/18F24D2200/123F24D2220/0207F24D2220/0235F24D2220/042F24D2220/06F25B2500/221F25B2700/21F25B2313/0231F24F11/36Y02B30/12F25B13/00
Inventor 高田茂生
Owner MITSUBISHI ELECTRIC CORP
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