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Cross-reverse type air-conditioning system

a reverse-type air conditioner and reverse-type technology, applied in the field of forced air defrost-type air-conditioning systems, can solve the problem of low heat pump efficiency under low working temperatur

Inactive Publication Date: 2009-07-09
HU LUNG TAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

"The present invention provides a cross-reverse type air-conditioning system that can defrost using cross-reverse refrigerant circulation and cross-air defrosting process. The control method prevents malfunctions of the evaporators. Additionally, the system can prevent frost formation over an outdoor temperature range of 20 degree Celsius to negative -40 degree Celsius."

Problems solved by technology

One of the reasons is the low efficiency of the heat pump under low working temperature; another reason is the need for interrupting operation due to the frost conditions on evaporators.

Method used

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Embodiment Construction

[0016]The first embodiment of present invention is shown in FIG. 1A to FIG. 1F and the table 1 is used as a reference to understand the control method of the present invention. As shown in the table 1, the present invention includes a combination of the two defrosting methods, the first defrosting method can be applied to the operation environment where the outdoor temperature is from 20 degree Celsius to 0 degree Celsius, the second defrosting method can be applied to the operation environment where the outdoor temperature is from 10 degree to negative 40 degree Celsius; the threshold of switching the system from the first defrosting method to the second defrosting method can be adjusted according to the operating condition. However, for the ease of comprehension, the following embodiments will be explained with a threshold of 5 degree Celsius for the system to switch from the first defrosting method to the second defrosting method.

[0017]Now referring to FIG. 1A and the table 1, th...

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Abstract

The present invention provides an air-conditioning system capable of continuous heating operation over an outdoor temperature range of 20 degree to negative 40 degree Celsius. The present invention utilizes at least two sets of the evaporators capable of cross-reverse refrigerant circulation and cross-air defrosting process, which alternately generates the heat energy required for the defrosting process and the air-conditioning, and said air-conditioning system can apply a combination of the two defrost methods to raise overall heating efficiency.

Description

FIELD OF THE INVENTION[0001]The present invention relates to a forced-air-defrost type air-conditioning system, more particularly to a cross-reverse type air-conditioning system capable of the cross-reverse defrosting process and the cross-air defrosting process.[0002]The present invention can be applied on residential, agriculture, and industrial purposes.BACKGROUND OF THE INVENTION[0003]The present invention is a divisional application of the patent application No. 20070137238 filed on Dec. 20, 2005, entitled “Multi-range cross defrosting heat pump system and humidity control system.”[0004]Current available heat pump requires different types of compressors for different range of working environment temperature; therefore, the user may need to install multiple air-conditioning systems such as a combination of a heat pump and a gas heater for different range of working temperature. One of the reasons is the low efficiency of the heat pump under low working temperature; another reaso...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F25D21/06F25B1/00F25B7/00
CPCF25B5/02F25B2400/04F25B47/022F25B29/003F25B49/02F25B47/02F25B1/00
Inventor HU, LUNG-TAN
Owner HU LUNG TAN