Unlock instant, AI-driven research and patent intelligence for your innovation.

Air-conditioning apparatus

a technology for air conditioning and air conditioners, applied in mechanical devices, light and heating devices, refrigeration components, etc., can solve the problems of reducing the oxygen content of air in indoor spaces and adverse effects on the human body, and achieve the effect of increasing safety and reducing environmental load

Inactive Publication Date: 2012-11-01
MITSUBISHI ELECTRIC CORP
View PDF8 Cites 12 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention relates to an air-conditioning apparatus that can reduce environmental load while ensuring safety. More specifically, it includes an indoor unit with a concentration detection device and a shut off device that can shut off the circulation of refrigerant in case of refrigerant leakage. The air-conditioning apparatus uses a refrigerant that has low global warming potential, such as carbon dioxide, and the system is designed to minimize the amount of refrigerant leakage in the event of a leakage. The technical effect of the invention is to provide an air-conditioning apparatus that can effectively prevent refrigerant leakage and minimize the impact on human body and environment in case of leakage.

Problems solved by technology

If, by any cause, the refrigerant were to leak from an indoor unit disposed in an indoor space, depending on the type of refrigerant in which some has inflammability and toxicity, a grave problem from the viewpoint of effect to the human body and safety will be created.
Further, even if the refrigerant is not toxic to the human body, cases can be assumed in which the oxygen content of air in the indoor space decrease due to the leakage of the refrigerant, and, accordingly, causing adverse effects to the human body.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Air-conditioning apparatus
  • Air-conditioning apparatus
  • Air-conditioning apparatus

Examples

Experimental program
Comparison scheme
Effect test

embodiment 1

[0024]FIG. 1 is a schematic circuit diagram illustrating an exemplary circuit configuration of an air-conditioning apparatus 100 according to Embodiment 1 of the invention. The detailed circuit configuration of the air-conditioning apparatus 100 will be described with reference to FIG. 1. FIG. 1 illustrates an example in which four indoor units 300 are connected. It should be noted that the dimensional relationships of components in FIG. 1 and other subsequent figures may be different from the actual ones.

[0025]As illustrated in FIG. 1, the air-conditioning apparatus 100 includes an outdoor unit (heat source unit) 200 and indoor units 300 (indoor unit 300a to 300d) connected by pipings 400 (piping 400a and 400b). Specifically, in the air-conditioning apparatus 100, a plurality of indoor units 300 are connected in parallel with the outdoor unit 200. Note that the pipings 400 are refrigerant pipings that communicate a refrigerant (heat source side refrigerant). Further, it is assumed ...

embodiment 2

[0059]FIG. 6 is a schematic diagram illustrating an exemplary installation of an air-conditioning apparatus according to Embodiment 2 of the invention. The exemplary installation of the air-conditioning apparatus will be described with reference to FIG. 6. This air-conditioning apparatus uses refrigeration cycles (a refrigerant circuit A and a heat medium circuit B) in which refrigerants (a heat source side refrigerant or a heat medium) circulate such that a cooling mode or a heating mode can be freely selected as its operation mode in each indoor unit. Note that in Embodiment 2, portions different to that of Embodiment 1 will be mainly described and same parts as Embodiment 1 will be referred to with the same reference numerals and description thereof will be omitted.

[0060]In the air-conditioning apparatus 100 according to Embodiment 1, a method in which refrigerant is used directly (direct expansion method) is employed. However, in an air-conditioning apparatus according to Embodi...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Providing an air-conditioning apparatus that is capable of securing safety while reducing load to the environment.The air-conditioning apparatus 100 includes a concentration detection device 305 that detects the concentration of a heat source side refrigerant leaking from the refrigerant circuit, shut off devices (first shut off device 303 and second shut off device 304) that shut off the circulation of the heat source side refrigerant on the basis of information from the concentration detection device 305.

Description

TECHNICAL FIELD[0001]The present invention relates to an air-conditioning apparatus which is applied to, for example, a multi-air-conditioning apparatus for a building.BACKGROUND ART[0002]In conventional air-conditioning apparatuses such as a multi-air-conditioning apparatus for a building, a refrigerant is circulated between an outdoor unit, which is a heat source unit disposed, for example, outside a building, and indoor units disposed in rooms in the building. The refrigerant transfers heat or removes heat to heat or cool air, thus heating or cooling a conditioned space through the heated or cooled air. In such a multi-air-conditioning apparatus for a building, a plurality of indoor units is connected, and there are many cases in which indoor units not in operation and indoor units in operation co-exist. Further, there are cases in which the piping connecting the outdoor unit and the indoor units extend up to a length of 100 meters at the most. The longer the piping, the greater ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(United States)
IPC IPC(8): F25B49/02
CPCF24F2011/0084F25B13/00F25B25/005F25B41/04F25B2600/2519F25B2309/061F25B2400/08F25B2500/222F25B49/005F25B2313/003F24F11/36F25B41/20F25B41/24
Inventor MORIMOTO, HIROYUKIYAMASHITA, KOJIHATOMURA, TAKESHIWAKAMOTO, SHINICHI
Owner MITSUBISHI ELECTRIC CORP