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Air conditioner

A technology for air conditioners and compressors, which is applied in the direction of refrigerators, compressors, high-efficiency regulation technology, etc., and can solve problems such as high cost

Inactive Publication Date: 2005-07-20
DAIKIN IND LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, when the above-mentioned differential pressure adjustment device is used, since the refrigerant tank and several electromagnetic on-off valves are required, the refrigerant circuit and the refrigerant circuit and control equipment required for refrigerant quantity control are expensive. There is still room for improvement

Method used

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Examples

Experimental program
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Effect test

Embodiment Construction

[0034] The air conditioner of this embodiment is as figure 1 As shown, an outdoor unit 1 is connected to four indoor units 2 to form a heat pump cooling and heating device.

[0035] The interior of the outdoor unit 1 accommodates an inverter-driven compressor 11, an outdoor heat exchanger 12, an outdoor fan 12a, an outdoor fan motor 12b composed of a variable-speed DC motor, and four expansion devices 13 for each indoor unit. , Four-way switching valve 14, accumulator (accumulator) 15, liquid pipe 16, gas pipe 17, etc. The outdoor heat exchanger 12 is connected to the compressor 11 through a four-way switching valve 14 . The accumulator 15 is connected between the four-way switching valve 14 and the suction port of the compressor 11 . The indoor unit connection side on the liquid pipe 16 is branched into four. The indoor unit connection side of the gas pipe 17 is branched into four. The expansion device 13 is an electric expansion valve for both heating and cooling, and is...

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PUM

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Abstract

An air conditioner, comprising a low cost differential pressure regulating device capable of holding a difference between the high and low pressures of a compressor during the cooling operation under a low atmospheric temperature at a specified value or higher, the low cost differential pressure regulating device further comprising a first stage differential pressure regulating device for regulating the difference between high and low pressures so as to prevent the difference from lowering by lowering the speed of an outdoor fan when the difference between high and low pressures of the compressor during the cooling operation under a specified atmospheric temperature or below lowers to a specified value and a second stage differential pressure regulating device for regulating the difference between high and low pressures so as to prevent the difference from lowering by increasing the operating frequency of the compressor when the difference between high and low pressures cannot be held at the specified value or higher by the control of the difference between high and low pressures by the first stage differential pressure regulating device.

Description

technical field [0001] The present invention relates to an air conditioner, in particular to an air conditioner with a differential pressure adjusting device for maintaining the pressure difference between the high and low pressures of a compressor during cooling operation at a lower external air temperature to be equal to or greater than a predetermined value. technical background [0002] In recent years, due to the increase in illuminance of lighting fixtures and the increase in electronic equipment, air conditioning has to be performed even when the outside air temperature is relatively low. For this reason, it is required that the outside air temperature range in which the cooling operation of the air conditioner can be performed is extended toward a lower temperature. On the other hand, as a general characteristic of an air conditioner, the lower the outside air temperature is, the smaller the pressure difference between high and low pressure during air-cooling operati...

Claims

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Application Information

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IPC IPC(8): F25B13/00F25B49/02
CPCF25B2600/0253F25B2700/2106Y02B30/743F25B2313/0233F25B2313/0315F25B2700/1931F25B2600/111Y02B30/741F25B13/00F25B49/027F25B2313/0314F25B2700/1933F25B2313/0294F25B2500/08F25B2600/021F25B49/025Y02B30/70
Inventor 片冈秀彦三轩家秀纪
Owner DAIKIN IND LTD
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