Air conditioner
A technology for air conditioners and compressors, applied to compressors, refrigerators, compressors with reversible cycles, etc., which can solve the problems of longer defrosting time and unusability
Active Publication Date: 2009-07-08
HITACHI JOHNSON CONTROLS AIR CONDITIONING INC
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- Abstract
- Description
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- Application Information
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Problems solved by technology
[0010] In the air conditioner disclosed in Patent Document 1, since defrosting is always performed during the heating operation, there is a problem that indoor heating is performed in a state where the heating capacity is always lowered.
In addition, defrosting of the smallest part of the outdoor heat exchanger divided into three parts is switched sequentially, so there is a problem that the defrosting time becomes longer
[0011] In the air conditioners in Patent Document 2 and Patent Document 3, since the outdoor heat exchangers are separated into two rows in front and rear in relation to the air flow and defrosting is performed alternately, there is a problem that one of the separated outdoor heat exchangers cannot be The melted water generated by defrosting is used to melt the frost on the other side, and defrosting cannot be efficiently performed in a short time
[0012] The air conditioner in Patent Document 4 performs defrosting alternately by separating the left and right outdoor heat exchangers relative to the air flow, so there is a problem that the melted water generated by defrosting one of the separated outdoor heat exchangers cannot be Defrost cannot be efficiently performed in a short time by utilizing the melting of frost on the other side
Method used
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Embodiment Construction
[0035] Hereinafter, an air conditioner according to an embodiment of the present invention will be described with reference to the drawings.
[0036] First, use figure 1 and figure 2 The overall configuration of the air conditioner of this embodiment will be described. figure 1 It is a configuration diagram of an air conditioner according to an embodiment of the present invention. figure 2 Yes figure 1 Diagram of the refrigeration cycle of the air conditioner.
[0037] The air conditioner 1 includes a refrigeration cycle, a blower, and a control system for controlling them. In addition, this air conditioner 1 is a split-type air conditioner in which the indoor unit 2 and the outdoor unit 6 are connected through refrigerant piping 8 , electrical wiring, signal wiring, and the like.
[0038] The refrigeration cycle has a compressor 75, a four-way valve 72, an outdoor heat exchanger 73, main circuit switch valves 713a, 713b, a decompression device 74, a heat pipe 713d, an ...
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An air conditioner is provided to carry out defrosting operation simultaneously with heating operation without stopping the heating operation by dividing an outdoor heat exchanger into two parts connected with each other in parallel and carrying out the defrosting operation alternately, thereby keeping the pleasant room condition and reducing the defrosting time. An air conditioner includes an outdoor heat exchanger(73) having a refrigerant circuit divided into two parts of upper and lower heat exchange parts(731,732), wherein the upper one is larger than the lower one. A controller opens and closes a main circuit opening / closing element(713a,713b) and a bypass opening / closing valve(715a,715b) oppositely when defrosting is initiated in the middle of heating operation in a defrosting / heating mode. In this case, the upper heat exchange part is defrosted while the lower one is in the heating operation and then the lower heat exchanger part is defrosted while the upper one is in the heating operation. After the defrosting / heating mode is finished, the air conditioner is returned to a heating mode.
Description
technical field [0001] The invention relates to an air conditioner, especially an air conditioner suitable for simultaneously defrosting an outdoor heat exchanger and heating the room. Background technique [0002] When the air heat source heat pump air conditioner performs heating operation, if the humidity of the outdoor air is high, frost will form on the outdoor heat exchanger. When frost is formed, the ventilation passage of the outdoor heat exchanger becomes narrow, so the amount of outdoor air circulating through the outdoor heat exchanger decreases. If the amount of outdoor air to be circulated decreases, the amount of heat exchange decreases. Therefore, to supplement this, the evaporation temperature of the refrigerant flowing through the outdoor heat exchanger is lowered. As the temperature of the refrigerant drops, the surface temperature of the outside air side of the outdoor heat exchanger also drops, and frost is more likely to occur and further develops. In ...
Claims
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IPC IPC(8): F25B47/02
CPCF25B13/00F25B47/02F25B49/025F25B2313/02741F25B2600/11F25B2600/2501F25B2700/2103
Inventor 渡边正彦小栗诚
Owner HITACHI JOHNSON CONTROLS AIR CONDITIONING INC