JPS5843736Y2 - air conditioner - Google Patents

Description

[Detailed description of the invention] This invention is an air conditioner equipped with a spray device that sprays minute water droplets on the surface of a heat exchanger, and prevents the spray device from freezing and breaking due to a drop in outside air temperature in winter. The purpose is to prevent

Conventionally, there have been air conditioners that improve heat exchange efficiency by spraying minute water droplets on the surface of a condenser or radiator to utilize the latent heat of evaporation of the water droplets.

Figure 1 shows an example of application to a heat pump type air conditioner.

1 is a compressor, and a well-known heat pump refrigeration cycle is constructed by sequentially connecting a four-way valve 2, an outdoor heat exchanger 3, a heating throttle device 4, a cooling throttle device 5, and an indoor heat exchanger 6 through piping. There is.

7 and 8 are check valves connected in parallel to the throttle devices 4 and 5, respectively.

9 is an outdoor blower, and 10 is an indoor blower. 11 is a spray device that sprays minute water droplets onto the surface of the outdoor heat exchanger 3;
For example, a spraying liquid is supplied through a communication pipe 13 communicating with a water pipe 12.

14 is a solenoid valve that controls the presence or absence of spraying.

During cooling operation in the summer, high-temperature refrigerant gas leaving the compressor 1 passes through the four-way valve 2 and is condensed in the outdoor heat exchanger 3 through heat radiation.

During this time, the surface of the outdoor exchanger 3 is covered with the spray device 1 along with the air flow.
The minute water droplets from the outdoor heat exchanger 3 are supplied to improve the heat exchange capacity of the outdoor heat exchanger 3.

The liquefied refrigerant that exits the outdoor heat exchanger 3 passes through the check valve 7, is depressurized and expanded in the cooling throttle device 5, absorbs heat and evaporates in the indoor heat exchanger 6, and is then sucked into the compressor 1 via the four-way valve 2. be done.

During heating operation in winter, the spray device 11 does not operate, and the refrigerant leaving the compressor 1 is transferred to the four-way valve 2, the indoor heat exchanger 6, the check valve 8, the heating throttle device 4, and the outdoor heat exchanger 3. , the four-way valve 2, and the compressor 1, and heating operation is performed by repeatedly releasing and absorbing heat.

The most commonly used air conditioner is a separate type air conditioner, which is divided into an indoor unit 15 located indoors and an outdoor unit 16 located outdoors.

Therefore, when the outside air temperature drops in winter, the spray device 1 is not used and is located in the air flow path of the outdoor heat exchanger 3.
Accidents have occurred in which the spraying liquid that had accumulated in the sprayer 11 since the summer froze and the sprayer 11 was destroyed due to the expansion of the ice.

Particularly during heating operation, heat is rapidly removed from the spray device 11 by the wind from the outdoor blower 9, which causes a rapid freezing phenomenon and is likely to cause a breakage accident.

FIG. 2 shows an embodiment of the present invention.

17 is a spraying device, and its inlet hole 18 opens into a heat exchanger 19 for anti-freezing.

The antifreeze heat exchanger 19 has therein a refrigerant pipe 20 that connects the discharge side of the compressor 1 and the four-way valve 2 .

A retention section 21 is present between the refrigerant pipe 20 and the inner wall of the antifreeze heat exchanger 19, and is filled with the spray liquid.

22 is an artificial pipe located below the anti-freezing heat exchanger 19, and is connected to the water pipe 12 via the solenoid valve 14.

When winter heating operation is performed with the above configuration, the refrigerant pipe 20
Since the high-temperature refrigerant gas discharged from the compressor 1 flows therein, the spray liquid staying in the antifreeze heat exchanger 19 is heated.

Therefore, when performing the winter heating operation, even if the outdoor air temperature drops and the spray device 17 is rapidly cooled by the outdoor blower 9, it will not freeze, and the spray device 17 can be prevented from being damaged by freezing.

Furthermore, according to the present invention, since the above-mentioned spraying liquid is repeatedly heated during heating operation for several months, the spraying liquid accumulated in the antifreeze heat exchanger 19 is removed from the tip opening 23 of the spraying device 17. It can be evaporated more slowly.

Therefore, the spraying liquid staying in the antifreeze heat exchanger 19 gradually decreases, and a void portion 24 is generated in the staying part 21.

Therefore, even if the outside air temperature drops and the residual spraying liquid freezes during the night when the heating operation is suspended, the gap portion 2
4, it can absorb volumetric expansion due to freezing,
It is possible to prevent freezing and destruction of the spray device 17 when the heating operation is stopped.

As described above, in the present invention, by providing a spraying device that sprays minute water droplets onto the surface of the heat exchanger, and installing an anti-freeze device in the spraying device, it has a great effect of preventing freeze damage of the spraying device. ing.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of a conventional air conditioner, and FIG. 2 is an explanatory diagram of an air conditioner according to an embodiment of the present invention. 1... Compressor, 2... Four-way valve, 3...
...Outdoor heat exchanger, 17...Spray device, 1
9... Antifreeze heat exchanger, 20...
Refrigerant piping that connects the compressor discharge pipe and the four-way valve.

Claims (1)

[Scope of utility model registration request] It has a spray device that sprays minute water droplets on the surface of the heat exchanger,
An air conditioner in which the spray device is provided with an antifreeze device, and the antifreeze device is a refrigerant pipe that connects the discharge side of the compressor and a four-way valve.