JPH04184024A - Ventilator and air conditioner with ventilator - Google Patents

Abstract

PURPOSE:To obtain a ventilator for forced ventilation of an attic of a house and obtain an air conditioner with ventilator, by providing a ventilating fan for exchanging air in an attic with outside air, and a solar battery for supplying electric power to the fan. CONSTITUTION:In summer when a large quantity of solar radiation is available, DC 100V electric power generated by a solar battery 18 is converted by a DC-DC converter 13 into DC 280V electric power, which is inverted into AC power by an inverter 12, and the AC power is supplied to a compressor 5. A portion of the DC 280V power is fed through a power line 25 to a controller 14, and outputs from the controller 14 are given to the inverter 12, a four-way valve 6, a refrigerant decompressor 8, an exterior ventilating fan 9 and a room fan 23. The inverter 12 controls the operating frequency of the compressor 15 according to the difference between room temperature and a set temperature, and also controls appropriately the opening of the decompressor 8, which is a electrically operated expansion valve.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a ventilation system using a solar cell as a power source, and an air conditioner equipped with a ventilation system.

(b) Prior Art Publication of Utility Model Publication No. 61-4174 discloses an air conditioner which uses a commercial source as a power source in combination with a solar cell power source to drive a compressor and a fan to save power.

(c) Problems to be Solved by the Invention The air conditioner presented in the above publication cools a living room, but when the amount of solar radiation is large, the air temperature in the attic decreases even if a vent is installed in the attic of the house. Due to the abnormal rise, the area near the ceiling became hot, and there was a risk that the living room would not be comfortably cooled even if the air conditioner was operated continuously.

In view of these problems, the present invention aims to provide a ventilation system for forcibly ventilating the attic of a house using solar cells as a power source, and an air conditioner equipped with the ventilation system.

(d) Means for Solving the Problems The present invention provides a ventilation fan that is placed in the attic of a house to exchange air in the attic with outside air, and a solar battery that is placed on the outer wall of the house and supplies power to the ventilation fan. The ventilation system was constructed from the following.

The present invention also provides an outdoor air conditioning unit that is placed in the attic of a house and has a ventilation device that exchanges air in the attic with outside air, and an outdoor air conditioning unit that is placed in a living room and is combined with the outdoor air conditioning unit to control the temperature of the living room. An air conditioner with a ventilator is configured from an indoor air conditioning unit that operates on the outside of the house, and a solar cell that is placed on the outer wall of the house and supplies power to the outdoor air conditioning unit and the indoor air conditioning unit.

(*) Effect.

When the amount of solar radiation is high, the air temperature in the attic of a house rises abnormally, but the solar cells also receive sufficient sunlight and generate maximum power, causing the ventilation fan of the ventilation system to rotate at the highest speed. This maximizes the amount of outside air that can be introduced into the attic, preventing high-temperature air from being trapped in the attic, and thus keeping the temperature rise near the ceiling low, so the cooling effect in the living room is not impaired.

In addition, by incorporating the ventilation system into the outdoor air conditioning unit and supplying the power generated by the solar cells to the outdoor air conditioning unit and the indoor air conditioning unit, this electric power is used to power the ventilation fan, the compressor of the air conditioning unit, and the backflow fan. Used as a power source.

(F) Embodiment An embodiment of the present invention will be explained based on FIG. 1 and FIG.
The outdoor air conditioning unit 10 includes an inverter compressor 5 with a rated output of 900 W, a four-way valve 6, an outdoor heat exchanger 7, a refrigerant pressure reducer 8 such as an electric expansion valve, and an outdoor ventilation fan 9.
, a rectifier 11 and an inverter 12 that converts direct current to alternating current.
A control unit 15 having a DC/DC converter 13, a controller 14, and a commercial power source 16 are placed on a ceiling 17 via a soundproof/vibration proof base 10a.

18 is an outer wall 19 such as an attic 19a and a side wall 19b of the house 1.
A ventilation system 20 is constituted by solar cells with a maximum output of IKW arranged in the ventilation fan 9.

Reference numeral 21 denotes an indoor air conditioning unit that has an indoor heat exchanger 22 and an indoor fan 23 and is placed in the living room 24. The solar cell 18 is connected to the input terminal of the DC/DC converter 13, and the commercial power source 16 is connected to the rectifier 11. The output end of the DC/DC converter 13 and the output end of the rectifier 11 are connected to the input ends of the inverter 12 and the controller 14, the output end of the inverter 12 is connected to the compressor 5, and the output end of the controller 14 is connected to the outside. The compressor 5 is connected to a ventilation fan 9, a refrigerant pressure reducer 8, and an indoor fan 23, respectively, and the operating frequency of the compressor 5 is controlled by a signal from a controller 14.

Next, to explain the operation operation, in the summer when there is a lot of solar radiation, the DC power of 100 cm generated by the solar cell 18 is
After being converted to DC 280V power by the C/DC converter 13, it is input to the inverter 12, converted to AC power, and supplied to the compressor 5, and a part of the DC 280V power is sent to the controller 14 via the power line 25. The output from the controller 14 is supplied to the inverter 12, the four-way valve 6, the refrigerant pressure reducer 8, the outdoor ventilation fan 9, and the indoor fan 23, respectively, and the inverter 12 adjusts the indoor temperature and the set temperature. The operating frequency of the compressor 5 can be controlled according to the temperature difference, and the valve opening degree of the refrigerant pressure reducer 8, which is an electric expansion valve, can be appropriately controlled.

Therefore, the refrigerant discharged from the compressor 5 passes through the four-way valve 6, the outdoor heat exchanger 7, the refrigerant pressure reducer 8, the indoor heat exchanger 22, and the four-way valve 6, which are set to the solid line state, in order and enters the compressor 5. A return cooling cycle is formed, and the indoor heat exchanger 7 acts as a condenser and the indoor heat exchanger 22 acts as an evaporator, thereby cooling the room.

During such cooling operation, when the amount of solar radiation is high, the attic 4 of the house 1
Although the air temperature inside the attic rises abnormally, the solar cell 1B also receives sufficient sunlight and the generated power reaches its maximum, and the maximum output from the controller 14 causes the ventilation fan 9 to rotate at the maximum rotation speed, so that air is sucked into the attic 4. The amount of outside air introduced from the port 2 and discharged from the exhaust port 3 is maximized, preventing high-temperature air from being trapped in the attic 4, and thus suppressing the temperature rise near the ceiling 17. The cooling effect inside is not impaired.

Further, when the amount of solar radiation is low and the output voltage of the solar cell 18 is low, the power shortage is automatically covered by the power source 16 in the commercial room. That is, when the power generated by the solar cell 18 is sufficiently large, the input terminal of the inverter 12 is 280V or more, and the output of the commercial power supply 16 is 280V (100VX2X, /'min).
Since the power of the commercial power supply 16 is higher than that, the power of the commercial power supply 16 cannot be output from the rectifier 11, but when the amount of solar radiation decreases and the output of the solar cell 18 decreases and the input terminal of the inverter 120 becomes 280V or less, only the difference from the output of 280V of the commercial power supply 16 Electric power from commercial power supply 16 is output from rectifier 11 .

Therefore, the power of the solar cell 18 output from the DC/DC fan converter 13 and the power of the commercial power supply 16 output from the rectifier 11 are supplied to the inverter 12 and the controller 14, and the cooling operation is performed as described above. The room is cooled.

Furthermore, in the winter, the amount of solar radiation is lower than in the summer, so power from both the solar cell 18 and the commercial power source 16 is supplied to the inverter 12 and the controller 14 in the same manner as described above, and the compressor 5 is driven. The four-way valve 6 is set to the broken line state by the output from the controller 14, and the ventilation fan 9, indoor fan 23, and refrigerant pressure reducer 8 are driven as in the cooling operation. Therefore, the refrigerant discharged from the compressor 5 sequentially passes through the four-way valve 6 - the indoor heat exchanger 22 - the refrigerant pressure reducer 8 - the outdoor heat exchanger 7 - the four-way valve 6 and returns to the compressor 5, forming a heating cycle. The indoor heat exchanger 22 acts as a condenser, and the outdoor heat exchanger 7 acts as an evaporator, thereby heating the room.

In the above embodiment, the outdoor air conditioning unit 10 includes a compression a5, a four-way valve 6, and an outdoor heat exchanger 7 in the exterior casing.
, the refrigerant pressure reducer 8, the outdoor ventilation fan 9, etc. may not be built in and these devices may be placed exposed in the attic 4. In this case, these devices and the control unit 1
5 and a roof 1 with a solar cell 18 built in the attic 4
If it is formed as a roof unit consisting of the ceiling 9a and the ceiling 17, construction is easy.

Further, in the above embodiment, the ventilation fan 9 of the ventilation bag f&20, which exchanges the air in the attic 4 with outside air, is also used as an outdoor fan of the air conditioner. It may be provided separately from the commercial fan and driven only by the power generated by the solar cell 18.

(g) Effects of the Invention According to the present invention, when there is a large amount of solar radiation that causes the air temperature in the attic of a house to rise abnormally, the solar cells also receive sufficient solar radiation and the generated power reaches its maximum, allowing the ventilation fan of the ventilation system to Since it rotates at the maximum rotation speed, the amount of outside air that can be introduced into the attic is maximized, and high temperature air does not get trapped in the attic.
Therefore, the temperature rise near the ceiling in the living room can be suppressed to a low level, so that the cooling effect in the living room can be prevented from being impaired.

Furthermore, by incorporating the ventilation system into the air conditioner, the ventilation fan of the ventilation system can also be used as the outdoor fan of the air conditioner, and the power generated by the solar cells can be used to drive the air conditioner, resulting in energy-saving operation. can.

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[Brief explanation of drawings]

The drawings show an embodiment of the present invention; FIG. 1 is a schematic diagram of a house equipped with an air conditioner equipped with a ventilation system, and FIG. 2 is an explanatory diagram of the air conditioner equipped with a ventilation system. 1... House, 4... Attic, 9... Ventilation fan, 10... Outdoor air conditioning unit, 18...
・Solar cell, 19...Outer wall, 20...Ventilation system,
21... Indoor air conditioning unit, 24... Living room.

Claims (2)

[Claims] (1) A ventilation system characterized by comprising a ventilation fan placed in the attic of a house to exchange air in the attic with outside air, and a solar cell placed on the outer wall of the house to supply power to the ventilation fan. . (2) An outdoor air conditioning unit that is placed in the attic of the house and has a ventilation device that exchanges the air in the attic with outside air, and a room that is placed in the living room and that controls the temperature of the living room in combination with the outdoor air conditioning unit. 1. An air conditioner with a ventilation device, characterized in that it is comprised of an inside air conditioning unit and a solar cell placed on the outer wall of a house to supply power to the outdoor air conditioning unit and the indoor air conditioning unit.