JP2008116178A - Air conditioning method and device, and dehumidification method and device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a heating method using a package air conditioner substantially increasing cop by improving heating performance in a plastic greenhouse. <P>SOLUTION: A ceiling is composed of double curtains 2, 3 made of PVC with a certain interval in between, below a chevron roof 1a of the plastic greenhouse, an auxiliary chamber 5 made of PVC is adjacently provided, an outdoor unit 6 of the package air conditioner is installed in the auxiliary chamber 5, and an indoor unit 7 is installed in the plastic greenhouse 1. During heating operation, hot air in the auxiliary chamber is sent into the plastic greenhouse by a duct fan 8. Cold air generated by the indoor unit 7 is discharged into a space between the curtain 2 and the roof 1a via a duct 9, and a heat insulating layer is formed to improve a heat retaining effect of the plastic greenhouse 1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a cooling / heating method and apparatus and a dehumidification method and apparatus for a building using a heat pump type air conditioner, in particular, a garden facility such as a greenhouse or a house.

  A heat pump type air conditioner generally includes an outdoor unit in which a compressor and an outdoor heat exchanger are accommodated, and an indoor unit in which an indoor heat exchanger is accommodated. During the heating operation, the outdoor heat exchanger serves as a condenser. Also, during the cooling operation, the outdoor heat exchanger acts as an evaporator, and during the cooling operation, the outdoor heat exchanger takes away the latent heat of condensation, so when the outside air temperature decreases, the heat exchanger frosts, The coefficient of performance cop is 2.5 or less, and the heating performance is significantly reduced. For example, when the temperature is set to 13 ° C. to 20 ° C., the operation stops when the room temperature reaches 13 ° C. to 20 ° C., and after the stop, the cooling operation is resumed when the room temperature exceeds 20 ° C., It cannot be dehumidified during the suspension period.

  The first object of the present invention is to provide a heating and cooling method and apparatus using a heat pump type air conditioner with improved heating performance or cooling performance, and provides a dehumidification method and apparatus capable of dehumidifying continuously at a set temperature. This is the second purpose.

  The invention according to claim 1 relates to a cooling and heating method for achieving the first object, and includes a heat pump comprising an outdoor unit in which a compressor and an outdoor heat exchanger are housed, and an indoor unit in which the indoor heat exchanger is housed. A warm air whose temperature has been raised by an outdoor unit installed outdoors during cooling operation is introduced into the building by a duct fan, and the cold air generated by the indoor unit is placed between the roof of the building and the ceiling below the roof. On the other hand, it is characterized in that cool air whose temperature has dropped by an outdoor unit during heating operation is introduced into the building by a duct fan, and warm air generated from the indoor unit is discharged between the roof and the ceiling.

  The invention according to claim 2 relates to a cooling / heating device for carrying out the heating method of the invention according to claim 1, which achieves the first object, wherein the compressor and the outdoor heat exchanger are accommodated in an outdoor attached room. An outdoor unit to be installed; an indoor unit that contains an indoor heat exchanger and is installed in the building; and a heat pump type air conditioner together with the outdoor unit; and a duct fan that blows warm air or cold air in the attached room into the building And an air blower for sending cool air or warm air generated from the indoor unit between the roof and the ceiling.

  The invention according to claim 3 relates to a dehumidification method that achieves the second object, and is a heat pump comprising an outdoor unit that houses a compressor and an outdoor heat exchanger, and an indoor unit that houses an indoor heat exchanger. Using a type air conditioner, while cooling or heating a building with cold air or warm air generated from an indoor unit, warm air or cold air generated from an outdoor unit installed outdoors is introduced into the building by a duct fan .

  The invention according to claim 4 relates to a dehumidifying device for carrying out the dehumidifying method of the invention according to claim 3 to achieve the second object, wherein the compressor and the outdoor heat exchanger are accommodated in an outdoor attached room. An outdoor unit to be installed; an indoor unit that contains an indoor heat exchanger and is installed in the building; and a heat pump type air conditioner together with the outdoor unit; and a duct fan that blows warm air or cold air in the attached room into the building It is characterized by comprising.

  According to the first and second aspects of the invention, the cool or warm air generated from the indoor unit is sent between the roof and the ceiling, and the heat insulation effect is increased by forming a heat insulation layer, and the coefficient of performance is increased. Air conditioning performance can be improved.

  According to the inventions according to claims 3 and 4, the cooling operation is performed, and both the warm air generated from the outdoor unit and the cool air generated from the indoor unit are released into the building, thereby continuously operating the indoor temperature. Can be dehumidified continuously by the indoor unit.

  Hereinafter, embodiments of the present invention applied to a greenhouse will be described with reference to the drawings. However, the present invention can be applied not only to a greenhouse but also to a horticultural facility such as a greenhouse, a factory, and other buildings.

  FIG. 1 and FIG. 2 show a greenhouse 1, which is composed of a mountain-shaped roof 1a and a wall surface 1b, and a double vinyl curtain 2 having a fixed space between the ceiling under the roof. 3, each curtain 2, 3 forms a triple wall surface along the wall surface 1b.

  The vinyl house 1 is provided with an adjoining chamber 5 made of vinyl, and the adjunct chamber 5 is provided with an outdoor unit 6 containing a compressor and an outdoor heat exchanger. An indoor unit 7 that houses an indoor heat exchanger and that constitutes a packaged air conditioner together with the outdoor unit 6 is installed. A duct fan 8 is installed on the wall surface 1b of the greenhouse 1 in contact with the attached room 5 to send the warm air in the attached room heated by the outdoor unit 6 during the cooling operation to the inside of the plastic house. A fan (not shown) is provided to send cold air through a duct 9 to a space between the roof 1a and the curtain 2 under the roof. Configure the device.

  According to this embodiment, when heating the inside of the greenhouse, the air-conditioner cooling operation is performed and the warm air in the attached room heated by the outdoor unit 6 is sent into the greenhouse by the duct fan 8, and the cold air generated from the indoor unit 7 is sent. Is sent to the space between the roof 1a and the curtain 2 through the duct 9, and a heat insulating layer by cold air is formed between the outside air and the greenhouse 1 so as to enhance the heat retaining effect in the greenhouse.

  On the contrary, when the inside of the greenhouse is cooled, the heating operation is performed and the cool air in the attached room whose temperature is lowered by the outdoor unit is sent into the greenhouse by the duct fan 8 to form a heat insulation layer by the warm air.

  FIG. 3 shows the greenhouse 1 during the dehumidifying operation. The difference from the greenhouse shown in FIG. 2 is that the duct 9 is omitted, and the air conditioner is cooled and attached by the outdoor unit 6. Warm air in the room is sent into the greenhouse 1 by the duct fan 8, cool air generated from the indoor unit 7 is discharged into the greenhouse, and dehumidification is performed by the indoor heat exchanger of the indoor unit.

As shown in FIGS. 1 and 2, vinyl curtains 2 and 3 are also placed from the ridge in a greenhouse 1 having a width of 21.6 m, a depth of 54 m, a height of 3 m of the wall surface 1 b, and a height of 5 m of the ridge of the roof 1 a. 1 m and 0.2 m were installed apart and along the wall surface 1b. An air conditioner (cooling capacity 40.0 kw / h) manufactured by Toshiba Ceria Air Conditioning System Co., Ltd. was used as the package air conditioner, and MITSUBISHI-SOWA manufactured by Mitsubishi Electric Corporation was used as the duct fan 8. In detail, the former air conditioner is model RDA-P4002WS, an indoor unit 7 containing a blower with a power consumption of 2.2 kw, a compressor with a power consumption of 10.7 kw / h, and two fans with a power consumption of 0.35 kw / h. The type ROP-P4002KS outdoor unit 6 is housed, and the latter duct fan consists of a type DF40ETDI and two blowers with a power consumption of 0.6 kw (blowing rate 80 m ³ / h).

  Figure 4 shows the use of the vinyl house 1 shown in Figs. 1 and 2 installed in Nakahata Tachikoji, Yasuura-cho, Kure City, with temperature sensors installed at two locations within the house at a height of 1.2m. The temperature inside and outside of the greenhouse from 17:00 on October 24, 2006 to 8:00 on the same month was measured at the Hiroshima Prefectural Agricultural Technology Center and shows the results of the creation. From 17:00 to 23:00 Performed temperature control using a conventional heavy oil boiler (two 100,000 kcal blower boilers), and temperature was controlled by the above-described air conditioner from 23:00 to 8:00 the next day. As shown in the figure, the combustion by the boiler is performed nine times from 17: 00 to 23:00, average 14 minutes per time, but the power consumption by the air conditioner from 23: 00 to 8:00 the next day is Since the outdoor unit is 11.4kw / h, the indoor unit is 2.2kw / h, and the duct fan is 1.2kw / h, the total is 14.8kw / h, and within 9 hours it is 133.2kwh.

On the other hand, if the temperature control is performed using the boiler as before, the temperature is not controlled by the air conditioner for 9 hours from 23:00 to 8:00 on the next day, and the combustion frequency of the boiler is 18 times from the past data. Assuming that it burns for 14 minutes each time, the combustion time is 14 minutes × 18 times = 4.2 hours, and the combustion energy of the two boilers is 4.2 hours × 100,000 kcal × 2 = 840,000 When this is expressed as kwh, 1 kwh is 862 kcal, so it becomes 974.48 kwh. The coefficient of performance cop is 974.48 kwh ÷ 133.2 kwh = 7.3.
According to the present embodiment, as described above, cop is greatly improved.

Top view inside the house 1 is a schematic cross-sectional view taken along line AA in FIG. Schematic cross section during dehumidifying operation Figure showing measurement results

Explanation of symbols

1. ・ Vinyl house 1a ・ Roof 1b ・ Walls 2 and 3 ・ Curtain 5 ・ Attachment room 6 ・ Outdoor unit 7 ・ Indoor unit 8 ・ Duct fan 9 ・ Duct

Claims (4)

  Using a heat pump air conditioner consisting of an outdoor unit that houses a compressor and an outdoor heat exchanger and an indoor unit that houses an indoor heat exchanger, warm air that has been heated by an outdoor unit installed outdoors during cooling operation While being introduced into the building by a duct fan, the cool air generated from the indoor unit is released between the roof of the building and the ceiling below the roof, while the cool air that has fallen in temperature by the outdoor unit during heating operation is introduced into the building by the duct fan. A cooling and heating method characterized by being introduced and discharging warm air generated from an indoor unit between a roof and a ceiling.   An outdoor unit that houses a compressor and an outdoor heat exchanger, and is installed in an outdoor attached room; an indoor unit that houses an indoor heat exchanger and is installed in a building; and that constitutes a heat pump type air conditioner together with the outdoor unit; An air-conditioning apparatus comprising: a duct fan for blowing warm air or cold air in the attached room into the building; and a blower for sending cold air or warm air generated from the indoor unit between the roof and the ceiling.   Using a heat pump type air conditioner composed of an outdoor unit containing a compressor and an outdoor heat exchanger and an indoor unit containing an indoor heat exchanger, the building is cooled or heated with cold air or warm air generated from the indoor unit However, a dehumidification method characterized by introducing warm air or cold air generated from an outdoor unit installed outdoors into a building by a duct fan.   An outdoor unit that houses a compressor and an outdoor heat exchanger, and is installed in an outdoor attached room; an indoor unit that houses an indoor heat exchanger and is installed in a building; and that constitutes a heat pump type air conditioner together with the outdoor unit; A dehumidifying device comprising a duct fan for blowing warm air or cold air in the attached room into the building.