JPH10325587A - Auxiliary cooling device of air cooled condenser for air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To raise cooling efficiency and effective use rate of water by automatically controlling intermittent operation of a spray nozzle according to change of outdoor air temperature in an auxiliary cooling device wherein water is sprayed to radiation fins of an air cooled condenser of an air conditioner and the radiation fins are cooled by evaporation of the water. SOLUTION: Relation between operation time of a spray nozzle 4 required for spraying water onto an almost whole part of radiation fins 3 and outdoor temperature in a vicinity of an inlet opening of a condenser 2 and relation between interruption time of the spray nozzle 4 required for drying the almost whole part of the films 3 by evaporation of the sprayed water and outdoor temperature in the vicinity of the inlet opening, are respectively stored. On the basis of outdoor temperature detected by an outdoor temperature sensor 10 and the above storage, the operation time and interruption time of the spray nozzle are automatically controlled by a water spray control means 9.

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.

To cope with such a situation, the applicant of the present application has proposed an auxiliary cooling device for an air-cooled condenser of an air conditioner in Japanese Patent Application No. 9-31200.

[0004]

Such an auxiliary cooling device operates a spray nozzle for spraying fine particles or mist-like water almost uniformly to radiating fins of an air-cooled condenser of an air conditioner, and operates the spray nozzle. A control unit for stopping the spray nozzle unit, the amount of water sprayed by the spray nozzle unit is controlled to substantially evaporate without discharging drain water, and water is sprayed on the heated fins, and the sprayed water is sprayed. The cooling fins are efficiently cooled by the latent heat of evaporation.

The present invention further develops this auxiliary cooling device, and in particular, makes the spraying time of the spray nozzle and the spraying time of the sprayed water the most efficient in accordance with the change of incidental conditions such as the outside air temperature. The purpose of this is to control the situation.

[0006]

That is, the auxiliary cooling device for an air-cooled condenser according to the present invention, which meets the above-mentioned object, first has fine particles or atomized radiating fins on an air-cooled condenser of an air conditioner. A spray nozzle for spraying water substantially uniformly, a control unit for operating and stopping the spray nozzle, and a temperature sensor disposed near the suction port of the air-cooled condenser and detecting a temperature of outside air, The amount of water sprayed by the spray nozzle portion is controlled to an extent that the water is evaporated without almost draining the drain water, and water is sprayed on the heated radiating fins, and the cooling radiating fins are cooled by the latent heat of evaporation of the sprayed water. A cooling device, wherein the control unit has a relationship between an operation time of a spray nozzle unit required for spraying water to almost all of the radiation fins and an outside air temperature near a suction port of the air-cooled condenser. The relationship between the stop time of the spray nozzle required for the sprayed water to evaporate and almost the entire radiating fin to dry and the outside air temperature near the suction port is stored, and the temperature sensor detects the relationship. Water spray control means for automatically controlling the operation time and the stop time of the spray nozzle based on the outside air temperature and the storage, respectively, is provided.

A second auxiliary cooling device according to the present invention is as described in claim 2, and is a spray nozzle for spraying fine particles or mist-like water almost uniformly to radiating fins of an air-cooled condenser of an air conditioner. And the spray nozzle
A control unit for stopping, provided with a humidity sensor arranged near the suction port of the air-cooled condenser and detecting the humidity of the outside air,
The amount of water sprayed by the spray nozzle portion is controlled to an extent that the water is evaporated without almost draining the drain water, and water is sprayed on the heated radiating fins, and the cooling radiating fins are cooled by the latent heat of evaporation of the sprayed water. A cooling device, wherein the control unit has a relation between an operation time of a spray nozzle unit required for spraying water to almost all of the radiation fins and an outside air humidity near a suction port of the air-cooled condenser; The relationship between the stop time of the spray nozzle required for the evaporated water to evaporate and the drying of the heat radiation fins and the outside air humidity near the suction port is stored, and the outside air humidity detected by the humidity sensor is stored. And a sprinkling control means for automatically controlling the operation time and the stop time of the spray nozzle unit based on the storage.

Further, a third auxiliary cooling device according to the present invention is as described in claim 3, and a spray nozzle for spraying fine particles or mist-like water almost uniformly to a radiation fin of an air-cooled condenser of an air conditioner. Unit, a control unit for operating and stopping the spray nozzle unit, and a pressure sensor disposed on the high pressure side of the refrigerant pipe of the air-cooled condenser, and detecting a pressure in the pipe, comprising: An auxiliary cooling device that controls the amount of water to be sprayed to a degree that evaporates without substantially draining water, sprays water to the heated radiating fins, and cools the radiating fins by the latent heat of evaporation of the sprayed water. The control unit, the relationship between the operating time of the spray nozzle unit required to spray water to the entire heat radiation fin and the pressure in the refrigerant pipe of the air-cooled condenser,
A pipe that stores the relationship between the stop time of the spray nozzle and the pressure in the refrigerant pipe required for the sprayed water to evaporate and substantially dry the entire radiation fin, and the pipe detected by the pressure sensor. A sprinkling control means for automatically controlling the operation time and the stop time of the spray nozzle based on the internal pressure and the memory, respectively, is provided.

On the other hand, in each of the first and second auxiliary cooling devices of the present invention, a pressure sensor for detecting a pressure in the refrigerant pipe of the air-cooled condenser is provided on a high pressure side of the refrigerant pipe, and the sprinkling control means is provided. However, the relationship between the operation time of the spray nozzle portion required for spraying water to almost all of the radiating fins and the pressure in the refrigerant pipe, and the sprayed water evaporates and almost all of the radiating fins are dried. To store the relationship between the stop time of the spray nozzle portion and the pressure in the pipe required to perform, and the operating time of the spray nozzle portion based on the pressure in the pipe detected by the pressure sensor and the storage. It is also possible to automatically control the stop time respectively.

In each of the auxiliary cooling devices of the present invention, a water pressure sensor for detecting a water pressure of the spray nozzle portion is provided, and the water spray control means is required for spraying water to almost all of the radiation fins. The relationship between the operating time of the spray nozzle and the water pressure of the spray nozzle is stored, and the operating time of the spray nozzle is automatically set based on the water pressure of the spray nozzle detected by the water pressure sensor and the storage. It is also possible to control it.

In each of the auxiliary cooling devices of the present invention, a water temperature sensor for detecting a temperature of the water supplied to the spray nozzle portion is provided, and the water spray control means evaporates the water sprayed on the radiation fins. Then, the relationship between the stop time of the spray nozzle portion required to dry substantially all of the radiation fins and the temperature of the water supplied to the spray nozzle portion is stored, and the water temperature detected by the water temperature sensor and the storage are stored. Based on the above, it is also possible to automatically control the stop time of the spray nozzle unit.

[0012]

According to the first to third auxiliary cooling devices of the present invention, almost no optimum drain water is discharged in accordance with a change in the outside air temperature or outside air or a change in the refrigerant pressure of the condenser. And water can be sprayed again immediately after evaporation of the sprayed water.This makes it possible to use air with almost no waste and to use the latent heat of evaporation of the water very effectively to efficiently cool the air. It is possible to cool the radiation fins of the condenser.

In the first and second auxiliary cooling devices, more precise control can be performed by incorporating a change in the refrigerant pressure as a parameter for controlling the spray nozzle portion. In the auxiliary cooling device, by taking the water pressure and the water temperature of the spray nozzle portion as parameters, it is possible to perform more accurate control of the spray nozzle portion.

[0014]

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 has one (or several) spray nozzles for spraying fine granular or mist-like water almost uniformly to the radiating fins 3 of the air-cooled condenser 2 of the air conditioning outdoor unit. 4, a control unit 5 for operating / stopping the nozzle unit 4 (see FIG. 3), and a temperature sensor 10 disposed near the suction port of the air-cooled condenser 2 and detecting the outside air temperature in the vicinity thereof. For example, it operates when the outside air temperature rises to about 35 ° C. during the operation of the compressor, and the amount of water supplied to the heated radiating fins 3 so that no extra drain water is discharged from the nozzles 4. Are adjusted and sprayed, and the radiation fins 3 are cooled by the latent heat of evaporation of the sprayed water. The operating temperature of this auxiliary cooling device is shown in FIG.
Can be arbitrarily set by the user using the changeover switch 14 shown in FIG.

The auxiliary cooling device is detachably attached to the air-cooled condenser 2 (outdoor air-conditioning unit) 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 watering control means (circuit), and 10 is the temperature sensor.

As shown in FIG. 5, the water spray control means 9 controls the operation time of the spray nozzle 4 required for spraying water to almost all of the radiating fins 3 and the air-cooled condenser 2.
The relationship between the outside air temperature near the suction port and the stop time of the spray nozzle portion 4 required for the sprayed water to evaporate and to dry almost the entire radiation fin 3 is obtained. In addition to storing the relationship, the operating time and the stopping time of the spray nozzle unit 4 can be automatically controlled to the most efficient state based on the outside air temperature detected by the temperature sensor 10 and the storage. is there. Note that the outside air temperature here is a dry type (DB), but a wet type (WB) can also be adopted.

On the other hand, the temperature sensor 1 of the auxiliary cooling device
In addition to using the humidity sensor 10a in place of 0, and instead of the water spray control means 9, the operation time of the spray nozzle portion 4 required to spray water to almost the entire radiating fin 3 as shown in FIG. 2, the time required for the spray nozzle 4 to stop and the outside air humidity near the suction port to evaporate the sprayed water and to dry almost the entire radiating fin 3. Watering control for automatically controlling the operation time and the stop time of the spray nozzle unit 4 to the most efficient state based on the outside air humidity detected by the humidity sensor 10a and the storage, respectively. It is also possible to provide means 9a.

In place of the temperature sensor 10, a pressure sensor 10 is provided in the refrigerant pipe 11 on the high pressure side of the air-cooled condenser 2 and detects the pressure in the pipe 11.
5 and the operation time of the spray nozzle 4 required for spraying water to almost the entire radiating fin 3 and the refrigerant pipe 11 of the air-cooled condenser 2 as shown in FIG. And the pressure between the spray nozzle 4 and the pressure in the refrigerant pipe, which are required for the sprayed water to evaporate and to dry the radiation fin 3 substantially entirely. Watering control means 9 for automatically controlling the operation time and the stop time of the spray nozzle unit 4 to the most efficient state based on the pressure in the pipe detected by the pressure sensor 10b and the memory, respectively.
It is also possible to provide b.

The pressure sensor 10b and the water spray control means 9b are used together with an auxiliary cooling device having the temperature sensor 10 or the humidity sensor 10a, and the pressure of the refrigerant is taken as a parameter of the water spray control means 9 and 9a. It is also possible. In these auxiliary cooling devices, the water pressure of the spray nozzle 4 is about 2 kg / cm ²
And the water temperature is a standard water temperature of about 21 ° C.

On the other hand, in an auxiliary cooling device for controlling the operation of the spray nozzle unit 4 by detecting each change of the temperature, humidity and refrigerant pressure, a water pressure for detecting the water pressure of the spray nozzle unit 4 as shown in FIG. A sensor 12 is attached, and the watering control means 9, 9a, 9b stores the relationship between the operating time of the spray nozzle 4 required for spraying water to almost the entire radiating fin 3 and the water pressure of the spray nozzle 4. In addition, the operating time of the spray nozzle unit 4 can be automatically and efficiently controlled based on the water pressure of the spray nozzle unit 4 detected by the water pressure sensor 12 and the memory. The higher the water pressure of the spray nozzle unit 4, the shorter the operation time of the spray nozzle unit 4 for spraying water.

Similarly, each of the above auxiliary cooling devices is provided with a water temperature sensor 13 for detecting the temperature of water supplied to the spray nozzle unit 4 as shown in FIG.
The spraying control means 9, 9a, 9b supplies the spray nozzle 4 with the stop time of the spray nozzle 4 required for evaporating the water sprayed on the radiator fin 3 and drying the entire radiator fin 3 substantially. In addition to storing the relationship between the temperature of the water and the temperature of the water, the stop time of the spray nozzle unit 4 can be automatically controlled most efficiently based on the water temperature detected by the water temperature sensor 13 and the memory. . In this case, the cooling effect of the cooling fins is naturally higher when the temperature of the water sprayed from the spray nozzle unit 4 is lower, but the time required for evaporation is longer when the water temperature is lower.

In the auxiliary cooling device according to each of the embodiments of the present invention, the drainage water is almost completely discharged in accordance with a change in the outside air temperature or the outside air humidity, or a change in the refrigerant pressure of the condenser. Water can be sprayed on the radiating fins 3 in a close state, and water can be sprayed again immediately after evaporation of the sprayed water, so that the amount of water used for the evaporation can be reduced, and the latent heat of evaporation of the water can be effectively used. To cool the radiating fins 3 of the air-cooled condenser very efficiently. In addition, by incorporating the water pressure of the spray nozzle unit 4, the temperature of the supplied water, and the like as parameters for controlling the spray nozzle unit 4, more accurate control can be performed. By efficient cooling of the radiation fins, it is possible to improve the cooling capacity of the air conditioner and save energy at high temperatures, and to continue stable cooling operation.

The embodiment of the present invention has been described above.
In the auxiliary cooling device of each of these embodiments of the present invention, it is possible to detachably attach to the air conditioner, respectively,
As described above, the radiation fins of the air-cooled condenser are efficiently cooled by the latent heat of evaporation of water, thereby improving the cooling capacity of the air conditioner at high temperatures by 10% or more, and by 20%.
The above energy saving can be achieved.

[0026]

As described above, the auxiliary cooling device for an air conditioner according to the present invention is configured to be detachable from the air conditioner outside unit, and to spray water almost without draining water to the radiation fins of the condenser. An apparatus for cooling the radiating fins by the latent heat of vaporization of water, the operation time of a spray nozzle portion required to spray water over substantially the entire radiating fins, and the outside air temperature near the suction port of the air-cooled condenser. And the relationship with the outside air temperature and humidity, etc., respectively, and the relationship between the spray nozzle portion and the outside air temperature and humidity required for the sprayed water to evaporate and dry the entire heat radiation fins. And water spray control means for automatically and automatically controlling the operation time and the stop time of the spray nozzle unit based on the outside air temperature and humidity detected by the temperature and humidity sensor and the memory, respectively, in the most efficient manner. In response to changes in outside temperature and humidity, water can be sprayed on the radiating fins in an almost optimal state without draining water, and water can be sprayed immediately after evaporation of the sprayed water. Thus, the radiation fins are extremely efficiently cooled by effectively utilizing the latent heat of vaporization of the water with a small amount of water and over time, and as a result, the air conditioner can be used at high temperatures or in disadvantageous installation conditions. In addition to significantly improving the cooling capacity of the air conditioner, power consumption is reduced, energy is saved, and a stable cooling operation is continued. Further, by increasing parameters such as the pressure of the refrigerant of the air-cooled condenser, the water pressure of the spray nozzle, and the water temperature, it becomes possible to control the operation of the spray nozzle more appropriately.

[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 graph showing the relationship between the time required for spraying water at a spray nozzle and the drying time of sprayed water, the outside air temperature, humidity, and the pressure of a high-pressure side refrigerant pipe of an air-cooled condenser.

[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, 9a, 9b Watering control means 10 Outside temperature sensor 10a Humidity sensor 10b Pressure sensor 11 Refrigerant Piping 12 Water pressure sensor 13 Water temperature sensor 14 Changeover switch

Claims (6)

[Claims] 1. A spray nozzle for spraying fine or mist-like water almost uniformly to radiating fins of an air-cooled condenser of an air conditioner, a control unit for operating and stopping the spray nozzle, and the air-cooled condenser. It is arranged near the suction port of the vessel,
A temperature sensor for detecting the temperature of the outside air was provided, and the amount of water sprayed from the spray nozzle portion was controlled to an extent that the water was evaporated without almost draining water, and water was sprayed on the heated radiating fins. An auxiliary cooling device that cools the radiating fins by latent heat of evaporation of water, the control unit including an operating time of a spray nozzle unit required for spraying water to almost all of the radiating fins and a suction of the air-cooled condenser. The relationship between the outside air temperature near the mouth and the relationship between the stop time of the spray nozzle portion required for this sprayed water to evaporate and almost the entire radiating fin to dry and the outside air temperature near the suction port, respectively. Water spray control means for storing and automatically controlling the operation time and the stop time of the spray nozzle unit based on the outside air temperature detected by the temperature sensor and the storage, respectively; It cooled condenser of the auxiliary cooling device of an air conditioner according to claim. 2. A spray nozzle for spraying fine or mist-like water almost uniformly to a radiation fin of an air-cooled condenser of an air conditioner; a control unit for operating and stopping the spray nozzle; It is arranged near the suction port of the vessel,
A humidity sensor for detecting the humidity of the outside air was provided, and the amount of water sprayed by the spray nozzle portion was controlled to an extent that the water was evaporated almost without draining water. An auxiliary cooling device that cools the radiating fins by latent heat of evaporation of water, the control unit including an operating time of a spray nozzle unit required for spraying water to almost all of the radiating fins and a suction of the air-cooled condenser. The relationship between the outside air humidity near the mouth and the relationship between the spray nozzle stop time required for the sprayed water to evaporate and almost the entire radiating fin to dry and the outside air humidity near the suction port, respectively. Watering control means for storing and automatically controlling the operation time and the stop time of the spray nozzle based on the outside air humidity detected by the humidity sensor and the storage, respectively, is provided. It cooled condenser of the auxiliary cooling device of an air conditioner according to claim. 3. 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; A pressure sensor is provided on the high pressure side of the refrigerant pipe of the vessel, and a pressure sensor for detecting the pressure in the pipe is provided, and the amount of water sprayed by the spray nozzle portion is controlled to an extent that almost evaporates without discharging drain water, An auxiliary cooling device that sprays water to the heated radiating fins and cools the radiating fins by the latent heat of evaporation of the scattered water. The relationship between the required operation time of the spray nozzle portion and the pressure in the refrigerant pipe of the air-cooled condenser, and the spray nozzle required to evaporate the sprayed water and dry the heat radiation fins almost entirely. The relationship between the stop time of the spill portion and the pressure in the refrigerant pipe is stored, respectively, and the operation time and the stop time of the spray nozzle are automatically determined based on the pressure in the pipe detected by the pressure sensor and the storage, respectively. An auxiliary cooling device for an air-cooled condenser of an air conditioner, comprising a watering control means for controlling the temperature. 4. A pressure sensor for detecting a pressure in the refrigerant pipe of the air-cooled condenser is provided on a high pressure side of the refrigerant pipe, and the water spray control means is required for spraying water to almost all of the radiation fins. The relationship between the operation time of the spray nozzle portion and the pressure in the refrigerant pipe, and the stop time of the spray nozzle portion and the pressure in the pipe required for the sprayed water to evaporate and to dry almost the entire radiation fin. 2. The operation time and the stop time of the spray nozzle unit are automatically controlled based on the pressure in the pipe detected by the pressure sensor and the storage, respectively. Or an auxiliary cooling device for an air-cooled condenser of the air conditioner according to item 2. 5. A water pressure sensor for detecting a water pressure of said spray nozzle portion, wherein said water spray control means operates said spray nozzle portion to spray water substantially all over said radiation fins and said spray nozzle. The operation time of the spray nozzle unit is automatically controlled based on a relationship between a water pressure of the spray nozzle unit and a memory of the spray nozzle unit detected by the water pressure sensor and the storage. An auxiliary cooling device for an air-cooled condenser of an air conditioner according to 2, 3, or 4. 6. A water temperature sensor for detecting a temperature of water supplied to the spray nozzle portion, wherein the water spray control means is configured to evaporate water sprayed on the heat radiation fins and to dry almost all of the heat radiation fins. Storing the relationship between the stop time of the spray nozzle portion required to perform and the temperature of the water supplied to the spray nozzle portion, and based on the water temperature detected by the water temperature sensor and the memory, The auxiliary cooling device for an air-cooled condenser of an air conditioner according to any one of claims 1 to 5, wherein the stop time is automatically controlled.