JP2000337664A - Outdoor unit exhaust fan device for ventilation and exhaust heat - Google Patents

Abstract

(57) [Summary] [Object] The present invention mainly provides a ventilation / exhaust heat pump device having a function of heating and hot water supply with a heat pump when the outside air temperature is low. The purpose of the present invention is to provide a highly efficient heating and hot water supply operation without using a complicated control device while using the system for defrosting. [Composition] A duct that takes in ventilation exhaust heat and a heat-insulated and insulated box (air chamber) surrounding the existing air conditioner outdoor unit
In addition, an outdoor unit fan is designed to encourage backflow from the center of the propeller due to negative pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for performing cooling, heating, hot water supply, and ventilation by utilizing ventilation exhaust heat.

[0002]

2. Description of the Related Art When performing heating, cooling and hot water supply using a heat pump in a cold region, a known existing air conditioner outdoor unit is wrapped in a box, and a method using ventilation exhaust heat or a method using a mixture of ventilation exhaust heat and outside air is used. There are complicated controls. In addition, due to the limitation of the ventilation volume, only a very small capacity was able to be exhibited, and it was difficult to operate the heat pump based on the plan.

[0003]

[Problems to be solved by the invention] The biggest problem in heat pump heating in cold regions is that frost and ice freeze in the heat exchanger through which ultra-low-temperature refrigerant passes due to low outside air temperature, preventing heat exchange. To solve this, the heating operation must be stopped temporarily and defrosting must be performed in the reverse operation mode. Naturally, the heating efficiency will decrease.

[0004]

The object of the present invention is to provide a heat pump that uses a heat pump to provide heating and hot water supply functions when the outside air temperature is low. Another object of the present invention is to provide a highly efficient heating and hot water supply operation without requiring a complicated control device.

[0005]

SUMMARY OF THE INVENTION According to the present invention, a ventilating exhaust duct connected to a ventilating fan capable of ventilating a certain amount of air from the room is introduced into an outdoor unit of a known existing air conditioner. In a known device in which the exhausted portion of the existing air conditioner outdoor unit is exposed to the outside and enclosed in the box (air chamber), the known existing air conditioner outdoor unit has an exhaust propeller fan that can be automatically controlled (inverter). The angle of the root of the wing at the center of the propeller fan and the thickness and width of the wing are changed. When strong pressure causes external pressure due to negative pressure in the adiabatic and insulated box that wraps the existing air conditioner outdoor unit, reverse air is taken in from the outside and heat is given to the heat exchanger to make a U-turn exhaust. It has become.

[0006]

The present invention has the structure described above. Therefore, the constant ventilation air volume of about 20 ° C. in the living space is always discharged outside through the heat exchanger. When the room is relatively hot and does not need much heating heat,
The inverter function works and the exhaust fan of the existing outdoor unit of the air conditioner runs low. In this state, since the negative pressure phenomenon does not occur in the heat-insulated box surrounding the outdoor unit of the existing air conditioner, the air conditioner is operated in a normal ventilation and exhaust state. When the indoor temperature decreases due to a decrease in the outside air temperature and the like, and the equipment is set to the strong heating operation, the capacity of the exhaust fan increases, and the inside of the adiabatic and heat-insulated box is in a negative pressure state. The air pressure outside the insulated and heat-insulated box increases, and backflow air is generated from the center of the exhaust propeller fan, which has the weakest resistance to external pressure, and outside air flows into the insulated and heat-insulated box. With this device,
In the heating operation when the outside air temperature is relatively high, the room does not become low in temperature. Therefore, the low-temperature operation only by the ventilation exhaust heat does not generate the backflow air due to the negative pressure. When the outside temperature is low, the temperature of the room also decreases, so that the entire device operates strongly. At this time, a large amount of low-temperature outside air is taken in by the operation of the present invention. However, in a normal air conditioner, strong operation and weak operation are repeated in a short cycle for equipment maintenance. For this reason, it is conceivable that defrost will start due to inflow of low-temperature outside air due to strong operation, but immediately before switching to weak operation, it will be released from the negative pressure state and headwind will stop, and ventilation heat will pass straight through the heat exchanger As a result, a heating operation in which defrost hardly occurs can be performed. In the summer period, since the external opening / closing lid of the box insulated and kept warm is open, normal cooling operation can be performed.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention has the following embodiments.

<1> An embodiment of the present invention which was installed in a house in Sapporo City, tested for two years, and performed a highly efficient heating operation at −21 ° C. as shown in Table 1.

[0009]

[Table 1]

<2> As shown in Table 2, it was confirmed that, when the outside air temperature became higher than 4 ° C., the efficiency was improved by opening the external opening / closing lid and taking in a large amount of outside air. .

[0011]

[Table 2]

<3> An embodiment of the present invention in which a hole is formed in the center shaft of the propeller fan or the root of the blade.

<4> Embodiment of the present invention in combination with heat pump hot water supply device (13)

[0014]

The present invention has the following effects. 1. No complicated outside air-ventilation heat mixing device or control device is required. 2. Suppress defrost operation that lowers heating efficiency. 3. Heating and hot water supply operation with a certain volume is possible. 4. It can suppress the suction of snow. 5. Damage to equipment due to freezing can be suppressed. 6. Heat pump heating and hot water supply in severe cold regions can be implemented more efficiently. 7. In summer, it can be used as a normal air conditioner.

[0015]

[Brief description of the drawings]

FIG. 1 is a conceptual cross-sectional view of the structure of the present invention.

FIG. 2 is a flow line of air in a plane of a refrigerant pipe and a fin of the heat exchanger of the present invention.

FIG. 3 is a structural diagram of an embodiment <3> of the present invention.

FIG. 4 is a structural sectional view of an embodiment <4> of the present invention.

[Table 1] Examples that demonstrate the performance of the present invention when installed in cold regions

[Table 2] Examples of the present invention which proved that the outside air temperature was 4 ° C when the air chamber was opened in a cold area test.

[0015]

[Explanation of Signs] Insulated and insulated box Existing air conditioner outdoor unit Propeller fan center Backflow air Ventilation exhaust duct External opening / closing lid U-turn exhaust Ventilation air hole 13 ▼ Heat pump water heater

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[Procedure amendment]

[Submission date] August 18, 1999 (1999.8.1)
8)

[Procedure amendment 1]

[Document name to be amended] Statement

[Correction target item name] Brief description of drawings

[Correction method] Change

[Correction contents]

[Brief description of the drawings]

FIG. 1 is a conceptual cross-sectional view of the structure of the present invention.

FIG. 2 is a flow line of air in a plane of a refrigerant pipe and a fin of the heat exchanger of the present invention.

FIG. 3 is a structural diagram of an embodiment <3> of the present invention.

FIG. 4 is a structural sectional view of an embodiment <4> of the present invention.

[Explanation of Signs] Insulated and insulated box Existing air conditioner outdoor unit Propeller fan center Backflow air Ventilation exhaust duct External opening / closing lid U-turn exhaust Ventilation air hole 13 ▼ Heat pump water heater

Claims (1)

[Claims] 1. A ventilated exhaust heat utilizing heat pump device in which a known air conditioner outdoor unit is wrapped in a heat-insulated and heat-insulated box. At the base of the wing, the wing shape has been changed to the windshield part (11), so that the backflow air is taken into the insulated and insulated box surrounding the outdoor unit of the existing air conditioner by the backflow action by negative pressure. An outdoor unit exhaust fan device for ventilation and exhaust heat.