JPH076674B2 - Anti-freezing device for air intake and exhaust of air conditioner - Google Patents

Description

TECHNICAL FIELD The present invention relates to an antifreezing device for an opening of an outer wall of a building by an air conditioner that sucks and discharges from an opening provided on the outer wall of the building.

[Conventional technology]

Conventionally, an air conditioner connected to an opening on an outer wall of a building as an intake / exhaust port has been disclosed in JP-A-60-120118 and JP-A-60-152835.
There is an example of the description such as a bulletin.

[Problems to be Solved by the Invention]

The above-mentioned prior art does not consider freezing prevention in that the outer wall opening may be frozen due to snow adhesion or the like at the time of snowfall, and the air conditioner performance is deteriorated due to a decrease in the amount of suction blown air due to freezing ice in the opening, There was a problem of limiting the operable range.

An object of the present invention is to prevent the opening from freezing by using an air conditioner connected to the opening.

[Means for Solving the Problems]

In order to achieve the above object, a hot gas pipe for flowing a high-temperature gas refrigerant from a compressor is arranged around the outer wall opening, and the inner wall temperature of the opening is set to 0 ° C or higher to prevent freezing and icing.

Further, in order to allow hot gas to flow according to the necessary conditions, the air conditioner is provided with a temperature detecting means and a switching solenoid valve, and effective operation control is performed.

[Operation] When the temperature of the thermistor provided in contact with the inner wall surface of the opening is 0 ° C. or less and a certain period of time has passed, the solenoid valve of the hot gas bypass is opened by a command from the control printed circuit board of the air conditioner. . As a result, the high-temperature gas refrigerant from the compressor flows into the hot gas pipe, the heat of the hot gas pipe is conducted from the surroundings to increase the temperature of the opening, and the progress of icing is prevented and deicing is achieved.

When the temperature of the inner wall surface reaches a predetermined temperature higher than 0 ° C., the electromagnetic valve of the hot gas bypass is closed by a command from the control printed circuit board of the air conditioner, and the normal operation is resumed.

As described above, the operation can be surely performed so as to prevent the freezing.

〔Example〕

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. FIG. 1 is a cross-sectional view of the vicinity of a suction port of a heat source side unit portion of an air conditioner connected to an outer wall of a building.

The air conditioner unit 1 is fixed in contact with the inner wall surface 21 of the building wall 20 and is also attached in contact with the slab 7. When the air blower 2 outside the air conditioner unit 1 is driven,
The outside air is sucked in the direction of the arrow from the air intake port 4 provided in the opening 5 of the building wall 20, and heat is exchanged through the heat source side heat exchanger 3, and then the air blower 2 passes through another passage (not shown) to build the building. The air is discharged to the outside again from the air outlet opening in the wall 20. A hot gas pipe 6 is connected to the heat source side heat exchanger 3, and is connected to a pipe forming a refrigeration cycle so that a high-temperature refrigerant flows.

FIG. 2 shows a refrigeration cycle system diagram of an integrated air conditioner according to an embodiment of the present invention. FIG. 2 shows a state during heating, in which the gas refrigerant discharged from the compressor 8 is sent to the heat exchanger 10 on the use side through the four-way valve 9. The temperature detected by the thermistor 11 provided on the inner wall surface of the outer wall opening 5 is monitored by the control printed board 12, but when the temperature below 0 ° C. is detected for a certain period of time, the inner wall surface of the opening freezes. The microcomputer of the control printed board 12 judges that the hot gas solenoid valve 13
The hot discharge gas refrigerant from the compressor 8 reaches the hot gas pipe 6 through the solenoid valve 13 and raises the inner wall temperature of the opening 5. As a result, the temperature of the inner wall surface is 0 ℃
When the temperature further rises and the thermistor 11 detects a predetermined temperature, the hot gas solenoid valve 13 is closed by a command from the control printed board 12 and the normal heating operation cycle is resumed.

Assuming now that it is snowing in winter, when the snow is sucked together with the outside air from the air suction port 4 and the opening 5 is cooled to 0 ° C. or less due to the outside temperature, the snow adhered to the inner wall surface of the opening is not melted. Without ice, the ice grows on the inner wall surface. The grown ice reduces the ventilation area of the air suction port 4, and reduces the suction air volume by increasing the ventilation resistance. As a result, the balance of the refrigeration cycle of the air conditioner is lost, and the performance is lowered and the operable range is limited due to the operation of the protective device.

On the other hand, when the hot gas pipe 6 for flowing a high-temperature gas refrigerant is provided around the opening 5 as in this embodiment, and the temperature of the inner wall surface of the opening reaches a temperature at which icing may occur. By inflowing the hot gas, the temperature of the inner wall surface of the opening can be increased by heat conduction from the hot gas pipe 6 to prevent freezing.

〔The invention's effect〕

According to the present invention, the temperature of the inner wall surface of the opening portion of the outer wall can be raised, so that there is an effect of preventing freezing. In addition, since it can be operated under conditions where freezing is expected, there is an effect that it is possible to reliably prevent freezing.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a combination state of an outer wall member and an air conditioner of an embodiment of the present invention, and FIG. 2 is a refrigeration cycle system diagram of the air conditioner of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1 ... Air-conditioner unit, 2 ... Blower, 3 ... Heat source side heat exchanger, 4 ... Air inlet, 5 ... Opening part, 6 ... Hot gas pipe,
7 ... slab, 8 ... compressor, 9 ... four-way valve, 10 ... use side heat exchanger, 11 ... thermistor, 12 ... control printed board, 13 ... hot gas solenoid valve

Front page continuation (72) Inventor Yoshihiro Kodama 390 Muramatsu, Shimizu City, Shizuoka Prefecture, Hitachi Shimizu Plant (72) Inventor Takashi Terauchi 390 Muramatsu, Shimizu City, Shizuoka Hitachi, Ltd. (72) Invention Akihiro Hamamoto 70 Hayakawa, Takaoka City, Toyama Prefecture Sankyo Aluminum Industry Co., Ltd.

Claims (1)

[Claims] 1. An air conditioner in which air is taken in and out through an opening provided in an outer wall of a building, wherein a pipe through which a high-temperature refrigerant of a refrigeration cycle flows is provided in the opening of the outer wall of the building. Anti-freezing device for air intake / exhaust port of.