Air Conditioner Having Cooling and Heating Functions
a technology of air conditioner and function, which is applied in the direction of domestic cooling apparatus, defrosting, application, etc., can solve the problems of abrupt increase of power consumption, inability to perform heating, and unfavorable evaporation, so as to prevent the formation of frost, increase the temperature of the outside air supplied to the outdoor unit, and work stably
Inactive Publication Date: 2009-11-05
CHUNGJU NAT UNIV IND ACADEMIC COOPERATION FOUND
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Benefits of technology
"The present invention relates to a cooling and heating air conditioner that can stably perform heating even in winter, preventing frost formation on the outdoor unit and ensuring stable operation. The invention solves the problem of poor evaporation due to low temperature of the outside air and unstable heating operation in the heating mode. The air conditioner uses first and second heat exchangers and an auxiliary expansion valve to increase the temperature of the coolant and improve evaporation. This prevents frost formation and allows for stable heating operation. The invention provides a more efficient and effective solution for cooling and heating air conditioners in winter."
Problems solved by technology
When the air conditioner is operated for heating, if the air flowing into the outdoor unit 2 has low temperature, the evaporation is not favorably performed due to the insufficient temperature difference between the air and the coolant at the outdoor unit coil 3.
During this, however, since the indoor unit 1 serves as an evaporator, the heating cannot be performed any more.
However, this abruptly increases power consumption.
Method used
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Embodiment Construction
[0018]Hereinafter, a cooling and heating air conditioner and the operation process according to an exemplary embodiment of the present invention will be described in detail with reference to the accompanying drawings.
[0019]FIG. 2 schematically shows a cooling and heating air conditioner according to an embodiment of the present invention.
[0020]Referring to FIG. 2, the cooling and heating air conditioner having an expansion valve 5, an indoor unit 100, an outdoor unit 200, and a compressor 400, further comprises an electronic control valve 500 such as a solenoid valve, a first heat exchanger 510, a second heat exchanger 520, and an auxiliary expansion valve 530. The electronic control valve 500 is opened when the ambient temperature of the outdoor unit 200 drops to lower than a preset value, thereby controlling high-temperature high-pressure liquid coolant to flow into the first heat exchanger 510. The first heat exchanger 510 performs heat exchange between the high-temperature high-...
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Disclosed is a cooling and heating air conditioner capable of performing heating more stably, preventing frost formation on coils of an outdoor unit even at subzero temperature in winter by using first and second heat exchangers and an auxiliary expansion valve. The air conditioner according to the present invention comprises an electronic control valve opened when the outside temperature is less than a preset value, a first heat exchanger performing heat exchange between high temperature liquid coolant and coolant passed through the outdoor unit and an auxiliary expansion valve, and a second heat exchanger disposed in front of the outdoor unit to induct thereinto the high temperature coolant. Since the second heat exchanger heats up the outside air through heat exchange before supplying the air to the outdoor unit, evaporation of the coolant can be stably performed in the outdoor unit, while preventing frost formation. Accordingly, heating can be performed constantly.
Description
TECHNICAL FIELD[0001]The present invention relates to an air conditioner having cooling and heating functions (hereinafter, referred to as ‘cooling and heating air conditioner’). More particularly, the present invention relates to a cooling and heating air conditioner capable of performing heating more stably, while preventing frost formation on coils of an outdoor unit even at subzero temperature in winter by using first and second heat exchangers and an auxiliary expansion valve.BACKGROUND ART[0002]Hereinafter, a conventional cooling and heating air conditioner will be described.[0003]FIG. 1 schematically shows the conventional cooling and heating air conditioner.[0004]The conventional cooling and heating air conditioner comprises an indoor unit 1 for heating up the indoor air through heat exchange between the indoor air and high-temperature high-pressure coolant flowing in during heating, an outdoor unit 2 for emitting heat to the atmosphere through heat exchange between the outs...
Claims
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IPC IPC(8): F25B29/00F25D23/00
CPCF25B47/02F25D21/04F25B2700/2106F25B1/00F25B13/00F25B49/02
Inventor JEON, CHANG DUKLEE, DAI HEELEE, KYEONG MINJI, DOO HWANCHAE, HONG KEUN
Owner CHUNGJU NAT UNIV IND ACADEMIC COOPERATION FOUND