JP4013206B2 - Air source heat pump air conditioner - Google Patents

Description

  The present invention relates to an air heat source heat pump type air conditioner.

  In the air heat source heat pump type air conditioner, the part corresponding to the so-called outdoor unit is provided with a condenser facing the axial flow type exhaust fan that blows air in the direction of the blade rotation axis, and the outside air is passed through the condenser. It has a structure that exchanges heat with the refrigerant and exhausts it outdoors.

Japanese Utility Model Publication No. 2-96534

  However, since the opening for taking in outside air remains exposed to the outdoors, when the weather is bad and the wind is strong, the air heat-exchanged in one condenser flows to the other condenser without being discharged from the exhaust fan, and goes outside. There is a problem that the ability falls out. In addition, since rainwater or the like enters through the gaps between the exhaust fans, some components of the heat pump (for example, electronic components) get wet with rainwater and cause troubles, which may hinder air conditioning operation.

  In order to solve the above-mentioned problem, the present invention includes a compression heat pump and an outside air passage provided with at least a pair of condensers of the heat pump across an exhaust fan in a casing, and a plurality of the condensers. The main feature is that the heat pump components are arranged between them, and at least the compressor and waterproofing parts among these components are covered, and a mountain-shaped cover that faces the exhaust fan is provided. .

According to the invention of claim 1, one cover can be used for both waterproofing of heat pump parts, sound insulation of the compressor, and prevention of inflow of heat exchanged air from one side of the condenser to the other. Reduction can be achieved, and quiet and stable air conditioning operation can be performed. Since the cover has a mountain shape, air can be guided and guided smoothly toward the exhaust fan with a small resistance, and reliable exhaust can be achieved. In addition, the wind insulation board can prevent the direct blowing of wind into the casing, reduce the condenser capacity due to solar radiation, and prevent the corrosion caused by the blowing of rainwater. This can be prevented more reliably. In addition, by providing the windproof heat insulating plate by adjusting the ratio of the gap area of the outside air intake portion according to the bias of the passing air volume distribution of the condenser, it is possible to equalize the condenser passing air volume distribution and improve the capacity.
In the invention of claim 2 , the pressure loss of the evaporator and the condenser is reduced and the heat exchange efficiency is improved, so that a small fan can be used and noise can be reduced. Since the number of heat transfer tubes can be increased by reducing the pressure loss, the evaporator and condenser can be downsized and the air conditioner can be downsized.

  1 and 2 show an embodiment of the air heat source heat pump type air conditioner of the present invention, and the solid and dotted white arrows indicate the blowing direction. This air conditioner supplies, into a casing 1, a compression heat pump C, a refrigerant-air heat exchange evaporator 2 capable of switching between refrigerant evaporation and refrigerant condensation of the heat pump C, and air-conditioning air in a casing 1. An air supply passage A provided with an air supply fan 6, and an outside air supply passage B provided in a pair of opposed manners at least as the refrigerant-air heat exchange condenser 3 of the heat pump C across the exhaust fan 5. ing. The axial exhaust fan 5 that blows air in the direction of the blade rotation axis is disposed near or outside the outer edge of the space sandwiched between the plurality of condensers 3 and between the plurality of condensers 3. Of these components, and a mountain-shaped cover 7 that covers at least the compressor 4 and a waterproof component (such as an electronic component or a connector that may cause electric leakage) and faces the top of the exhaust fan 5. Provide. The cover 7 is formed so as to overlap 2/3 or more with respect to the outside air passage inlet 9 that opens in the casing 1 corresponding to the condenser 3, and the wind shielding and rectifying effect of the heat exchanged by the condenser 3 Is preferably increased.

Windproof and heat insulating plates 8 are respectively provided outside the outside air blowing passage inlets 9. The windproof heat insulating plate 8 includes, for example, an outside air blowing path inlet one end edge near the exhaust fan 5 and a windproof heat insulating board one end edge, a gap area D1 far from the exhaust fan 5, and the other end edge of the wind blowing heat insulating board and the other end of the windproof heat insulating board. The ratio (D1: D2) to the gap area D2 is adjusted according to the deviation of the passing air volume distribution of the condenser 3 and provided. Thus, by providing the windproof heat insulating plate 8 by adjusting the ratio (D1: D2) of the gap area of the outside air intake portion, it is possible to equalize the condenser flow rate distribution and improve the capacity. Although not shown, a latent heat for evaporating heat to the condenser 3 may be provided inside the windproof heat insulating plate 8. In this case, the windproof heat insulating plate 8 can prevent water from being scattered during watering.

  The heat pump C includes a condenser 3 for exchanging heat of the circulating refrigerant with heat exchange air, an evaporator 2 for exchanging heat of air-conditioning air with the circulating refrigerant, a compressor 4, an expansion valve, and a positive refrigerant circulation direction. A reverse switching valve (four-way valve), a liquid receiver and the like (not shown above) are provided, and these are connected by piping to form a refrigerant circulation circuit, and the heat absorption of the condenser 3 and the evaporator 2 by the switching valve. And heat dissipation (evaporation function and condensation function) can be switched.

  The air-conditioning air inlet and air-conditioning air outlet of the air supply air passage A are provided in the casing 1, and the air-conditioning air inlet is used for returning air intake, outside air intake, mixed air intake of return air and outside air, etc. The air-conditioned air outlet is communicated with the air-conditioned space such as the room for air supply. The exhaust fan 5 blows air to the condenser 3 of the heat pump C, and the air-conditioning air is heat-exchanged (cooled and heated) in the evaporator 2 of the heat pump C by supplying air to the air-conditioned space. Air-conditioning operation is performed. The fin tubes of the evaporator 2 and the condenser 3 are preferably elliptical tubes with little pressure loss, but may be circular tubes.

  The present invention is not limited to the above-described embodiment, and the design can be freely changed without departing from the gist of the present invention. For example, the arrangement and number of the exhaust fan 5 and the condenser 3 can be freely changed. The structure can be changed or omitted.

Front sectional drawing which shows the Example of an air heat source heat pump type air conditioner. FIG. The same side view.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Casing 2 Evaporator 3 Condenser 4 Compressor 5 Exhaust fan 7 Cover 8 Windproof heat insulation board 9 Outside air ventilation path inlet B Outside air ventilation path C Heat pump

Claims (2)

The casing 1 is provided with a compression heat pump C and at least a pair of outside air blowing paths B provided with the condenser 3 of the heat pump C across the exhaust fan 5, and the plurality of the condensers 3. The components of the heat pump C are arranged, and among these components, a mountain-shaped cover 7 that covers at least the compressor 4 and the waterproof component and covers the top of the exhaust fan 5 is provided , and corresponds to the condenser 3. A windproof heat insulating plate 8 is provided outside the outside air blowing passage inlet 9 that opens in the casing 1, and the windproof heat insulating plate 8 is connected to one end edge of the outside air blowing passage close to the exhaust fan 5 and one edge of the windproof heat insulating plate. The ratio (D1: D2) of the gap area D1 between the other end edge of the outside air blower passage inlet and the other edge of the windproof heat insulating plate far from the exhaust fan 5 is the deviation of the distribution of the passing air amount of the condenser 3 and adjusted in accordance with the provided Air source heat pump air conditioning system, characterized in that. The air heat source heat pump type air conditioner according to claim 1 , wherein the fin tubes of the evaporator 2 and the condenser 3 of the heat pump C are elliptical tubes .

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