JPH10213361A - Auxiliary cooling device of air cooled condenser of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To contrive to enhance a cooling capacity and to save energy by cooling efficiently an air cooled condenser during high temperature or the like in an air conditioning device. SOLUTION: This auxiliary cooling device is provided with a spray nozzles 4 which sprays uniformly fine particles or foggy water over heat radiation fins 3 of an air cooled condenser 2 of an air conditioning device and a control unit which operates and stops the spray nozzle 4 and controls the amount of water which the spray nozzle 4 sprays to such an extent that it may be vaporized without producing drain water, thereby cooling the heat radiating fins 3 with the evaporation latent heat of this sprayed water.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an auxiliary cooling device for an air-cooled condenser of an air conditioner such as a heat pump.

[0002]

2. Description of the Related Art In recent years, particularly in urban areas, severe heat called a heat island phenomenon is generated in summer. At this time, the load of the cooling operation of the air conditioner increases, but, for example, an outdoor unit is installed in a narrow gap between buildings such as buildings, or a plurality of outdoor units are installed in a row. If the heat exchange of the condenser is not performed well, there are inconveniences such as the malfunction of the cooling due to the decrease in the cooling capacity, the increase in the payment of the electricity fee due to the increase in the power consumption, and in some cases the machine being stopped and unable to operate. Can also occur.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and has a feature that the water is sprayed on the radiating fins of the condenser, and the radiating fins are cooled by the latent heat of evaporation of the water, whereby the air is cooled. It is an object of the present invention to improve the cooling capacity of the harmony device and save energy by reducing power consumption, and to continue stable cooling operation.

[0004]

That is, the auxiliary cooling device of the air-cooled air-cooled condenser according to the present invention, which meets the above-mentioned object, has a fine-grained or mist-like water almost uniformly distributed on the radiating fins of the air-cooled condenser. A spray nozzle for spraying, and a control unit for operating and stopping the spray nozzle are provided, and the amount of water sprayed by the spray nozzle is controlled to substantially evaporate without drain water, and the temperature is raised. Water is sprayed on the radiating fins, and the radiating fins are cooled by the latent heat of evaporation of the sprayed water. Further, in the auxiliary cooling device of the present invention, the spray nozzle section can be operated intermittently by the control section.

On the other hand, a second auxiliary cooling device according to the present invention is provided between the radiating fins above the radiating fins of the air-cooled condenser of the air conditioner, and transmits the infiltrated water to the lower portion of the radiating fins. A sheet having a water-absorbing property, a water supply unit for supplying water to the sheet, and a control unit for controlling supply of water to the water supply unit, and an amount of water supplied to the sheet; Is controlled so that the water flowing through the radiating fins evaporates substantially without draining the water, and the radiating fins that have been heated by the latent heat of evaporation of the water that has wetted the radiating fins are cooled.

In the first and second auxiliary cooling devices according to the present invention, the radiating fins of the air-cooled condenser are provided in a separate radiating portion formed by extending the refrigerant liquid pipe of the air-cooled condenser as required. It is also possible.

On the other hand, a third auxiliary cooling device according to the present invention comprises a cooling liquid pipe of the air conditioner, which is required to extend, a radiation fin attached to the extended refrigerant liquid pipe, and a cooling fan for blowing air to the radiation fin. To form a separate heat dissipating part, a sheet having water absorbency attached to the heat dissipating fins, and a water supply unit for supplying water to the sheet.
A control unit for controlling the supply of water to the water supply unit,
In addition, the amount of water supplied to the sheet-like body is controlled so as to substantially evaporate without drain water, so that the sheet-like body is infiltrated with water, and the radiating fins heated by the latent heat of evaporation of the infiltrated water are cooled. It is characterized by doing. In the auxiliary cooling device, the control unit may operate the cooling fan intermittently.

[0008]

In each of the auxiliary cooling devices of the present invention, the radiation fins are efficiently cooled without draining water by the latent heat of vaporization of the water, thereby improving the cooling capacity of the air conditioner at high temperatures. Energy saving and stable cooling operation can be continued.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG.
An embodiment of the present invention will be described.

FIG. 1 is a sectional view showing a state in which an auxiliary cooling device according to an embodiment of the present invention is attached to an outdoor unit of a heat pump.
Is an exploded perspective view, FIG. 3 is a water system diagram of the auxiliary cooling device,
FIG. 4 is an electric system diagram.

The auxiliary cooling device 1 of the above embodiment comprises one (or several) spray nozzles for spraying fine and granular water or mist-like water almost uniformly to the radiating fins 3 of the air-cooled condenser 2 of the air conditioning outdoor unit. And a control unit 5 (see FIG. 3) for operating / stopping the nozzle unit 4. For example, when the outside air temperature becomes high around 35 ° C. while the compressor is operating, the temperature is raised. The radiating fins 3 are sprayed by adjusting the amount of water so that no excess drain water is discharged from each of the nozzle portions 4, and the radiating fins 3 are cooled by the latent heat of evaporation of the scattered water. .

The auxiliary cooling device is detachably attached to the air-cooled condenser 2 (outdoor unit of the air-conditioning room) by retrofitting, and the sprayed water is evaporated using the air generated by the cooling fan 2a of the outdoor unit. It is possible. The sprayed water is prevented from being scattered to other parts by the radiation fins 3 being arranged vertically. In FIG. 3, 6 is a pressure-resistant rubber hose connected to a water pipe, 7 is a strainer, 8 is a water supply solenoid valve, 9 is a thermostat for outside air temperature, and 10 is its sensor.

The thermostat 9 automatically opens the water supply electromagnetic valve 8 when the outside air temperature exceeds a certain high temperature range, and activates each spray nozzle unit 4. When the outside air temperature falls below the high temperature range to some extent, the thermostat 9 supplies water. 8 is closed so that each spray nozzle unit 4 is stopped. Instead of the thermostat 9, a detection means (not shown) for detecting the pressure in the refrigerant system may be provided, and the water supply electromagnetic valve 8 may be opened when the refrigerant exceeds a predetermined pressure. .

As shown in FIG. 4, the control unit 5 includes timers 11a and 11b. By controlling the water supply solenoid valve 8, water is sprayed from the spray nozzle unit 4 intermittently at required intervals. , Water and its latent heat of vaporization can be used as efficiently as possible. In other words, the control unit 5 waits for the sprayed radiating fins 3 to be almost dry by the timers 11a and 11b, and then sprays water again to the spray nozzle unit 4, which can be repeatedly performed. Note that one to several spray nozzles 4 can be selectively used depending on the size and output of the air-cooled condenser 2.

FIG. 5 is a sectional view showing a state in which an auxiliary cooling device according to a second embodiment of the present invention is attached to an outdoor unit of a heat pump. Between the fins 3 at the upper part of the
8, a water-absorbing sheet 13 such as a felt or a woven cloth, which is inserted above the sheet 8, and which is provided above the sheet 13 and supplies water to the sheet 13.
And a control unit (not shown) for controlling the supply of water to the water supply unit 14.

The sheet 13 is capable of almost uniformly pouring water from the water supply section 14 to the lower portion of each radiating fin 3 and is formed integrally with an element 16 described later.

The water supply unit 14 includes a water supply tank 15 in which a predetermined amount of water is automatically filled by the control unit, and a sponge or sponge-like element that causes water to flow down from the water supply tank 15 by capillary action (humidifying material). ) 1
6 is provided. The element 16 restricts the amount of water to be supplied so that the water flowing from the sheet 13 to the lower part of the radiating fin 3 is evaporated by the heat of the fin 3 so that no extra drain water is discharged. The sheet-like body 13 is capable of cooling the radiating fins 3 heated by the latent heat of vaporization of the water that wets the radiating fins 3.

As shown in FIGS. 6 and 7, since the sheet 13 is only inserted into the slit-shaped gap formed by the radiation fins 3, the auxiliary cooling device is connected to the outdoor unit. It is easy to put on and take off. In the figure, reference numeral 25 denotes a protection network.

The auxiliary cooling device 12 is controlled by automatically opening and closing the water supply solenoid valve 8 according to the outside air temperature by the thermostat 9 as shown in FIG. 3 or FIG. It can also be performed by turning ON / OFF. In FIG. 5, the same members as those in the previous example are denoted by the same reference numerals, and description thereof is omitted.

FIG. 8 is a sectional view showing a state in which an auxiliary cooling device according to a third embodiment of the present invention is mounted on an outdoor unit of a heat pump. This auxiliary cooling device 17 is a refrigerant liquid pipe of the air-cooled condenser 2. 18 has a separate heat dissipating part 19 formed by extending the existing state as required. That is, as shown in FIGS. 9 and 10, the radiator 19 includes a small cross fin coil 20 and a cooling fan 21 separately from the outdoor unit. A sheet 23 having water absorbency is attached. The sheet-like body 23 is infiltrated by water being sucked up by a capillary phenomenon from a water supply tank 24 installed below the sheet-like body 23, and the cooling fan 21 allows air to flow through the sheet-like body 23 and the surface of the radiation fin 22. The heat exchange with the refrigerant in the cross fin coil 20 is performed by evaporating the infiltrated water.

The control of the auxiliary cooling device 17 of this embodiment is performed by automatically opening and closing the water supply solenoid valve 8 according to the outside air temperature by the thermostat 9 as shown in FIG. 3 or FIG. ON / OFF of water supply
F can also be performed. And it is also possible to perform ON / OFF of the cooling fan 21 and intermittent operation.

Further, as a cooling means of the auxiliary cooling device of this embodiment, a spray nozzle portion as in the first embodiment may be used in place of the sheet 23 in which the water is infiltrated,
Further, it is also possible to adopt means as in the second embodiment. Alternatively, the spray member 4 may be used in combination with the sheet 13 or 23.

However, in the auxiliary cooling device of each embodiment of the present invention, the auxiliary cooling device can be detachably attached to the air conditioner, and the radiating fins 3 and 22 of the air-cooled condenser can be removed by the latent heat of evaporation of water. It is possible to efficiently cool, thereby improving the cooling capacity of the air conditioner at a high temperature by about 10% and to save about 20% of energy.

[0024]

As described above, the auxiliary cooling device of the air conditioner according to the present invention is detachably mounted on the outdoor unit of the air conditioner, sprays water on the radiation fins of the condenser, and uses the latent heat of evaporation of the water. Cooling the radiation fins, cooling the radiation fins very efficiently without draining water,
This significantly improves the cooling capacity of the air conditioner at high temperatures and in adverse installation conditions, and has the remarkable effect of reducing energy consumption by reducing power consumption and maintaining stable cooling operation. is there.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a state in which an auxiliary cooling device according to an embodiment of the present invention is attached to an outdoor unit of a heat pump.

FIG. 2 is an exploded perspective view of the auxiliary cooling device.

FIG. 3 is a water system diagram of the auxiliary cooling device.

FIG. 4 is an electrical diagram of the same.

FIG. 5 is a sectional view showing a state in which the auxiliary cooling device according to the second embodiment of the present invention is attached to an outdoor unit of a heat pump.

FIG. 6 is an enlarged sectional view showing an upper part of a radiation fin of the auxiliary cooling device.

FIG. 7 is a partially enlarged view of the same portion as viewed from the outdoor unit side.

FIG. 8 is a sectional view showing a state in which an auxiliary cooling device according to a third embodiment of the present invention is attached to an outdoor unit of a heat pump.

FIG. 9 is a front view showing a heat radiating unit of the embodiment.

FIG. 10 is an enlarged perspective view of the same.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Auxiliary cooling device 2 Air-cooled condenser 2a Cooling fan 3 Radiation fin 4 Spray nozzle part 5 Control part 6 Pressure-resistant rubber hose 7 Strainer 8 Water supply solenoid valve 9 Thermostat 10 Outside temperature sensor 11a, 11b Timer 12 Auxiliary cooling device 13 Sheet material 14 Water supply Unit 15 Water supply tank 16 Element 17 Auxiliary cooling device 18 Refrigerant liquid tube 19 Heat radiating unit 20 Cross fin coil 21 Cooling fan 22 Heat radiating fin 23 Sheet 24 Body water tank 25 Protection net

Claims (6)

[Claims] 1. A spray nozzle for spraying fine or mist-like water almost uniformly to a radiating fin of an air-cooled condenser of an air conditioner, a control unit for operating and stopping the spray nozzle, and The amount of water sprayed by the spray nozzle portion is controlled so as to substantially evaporate without discharging drain water, and water is sprayed on the heated radiating fins, and the radiating fins are cooled by the latent heat of evaporation of the sprayed water. An auxiliary cooling device for an air-cooled condenser of an air conditioner, characterized by: 2. The auxiliary cooling device for an air-cooled condenser of an air conditioner according to claim 1, wherein the control unit operates the spray nozzle unit intermittently. 3. A sheet-like body having a water-absorbing property, which is inserted between said heat-dissipating fins above said heat-dissipating fins of an air-cooled condenser of an air conditioner, and has a water-absorbing property so as to pass infiltrated water down to said heat-dissipating fins. A water supply unit for supplying water to the sheet-like body, and a control unit for controlling the supply of water to the water supply unit. An auxiliary cooling device for an air-cooled condenser of an air conditioner, characterized in that the fins are controlled to such an extent that water on the fins substantially evaporates, and the radiating fins heated by the latent heat of vaporization of the fins are cooled. 4. The air conditioner according to claim 1, wherein the radiating fins of the air conditioner are of a separate radiating portion formed by extending a refrigerant liquid pipe of the air-cooled condenser as required. Auxiliary cooling device of the air-cooled condenser of the device. 5. The refrigerant liquid pipe of the air conditioner extends as required.
A radiating fin attached to the extended refrigerant liquid tube and a cooling fan for blowing air to the radiating fin are provided so as to form a separate radiating portion and have water absorbing properties attached to the radiating fin. A sheet-like body, a water supply unit for supplying water to the sheet-like body, and a control unit for controlling the supply of water to the water supply unit, and draining the amount of water to be supplied to the sheet-like body The air-cooled condenser of the air conditioner is characterized in that the sheet-like body is infiltrated with water, and the radiating fins heated by the latent heat of evaporation of the infiltrated water are cooled by controlling the water to almost evaporate without causing evaporation. Auxiliary cooling device. 6. The auxiliary cooling device for an air-cooled condenser of an air conditioner according to claim 5, wherein the control unit operates the cooling fan intermittently.