JP2004317064A - Air conditioning system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a spray nozzle from being clogged by using soft water. <P>SOLUTION: Water spray devices 14a to 14c are provided along a heat exchanger surfaces of exterior units 13a to 13b, and the water spray devices 14a to 13c are provided with two or more nozzles 15a to 15c for spraying toward the heat exchangers. Soft water for spraying is supplied from the soft water supply pipes 16a to 16c to the water spray nozzles 14a to 14c, and the soft water supply pipes 16a to 16c are connected to a common soft water supply pipe 17 and then connected to a soft water generator 20 through a solenoid valve 19 controlled to open and close by a temperature sensor 18. The soft water generator 20 is connected through a booster pump 21 to a water supply pipe at need. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a cooling system with improved cooling efficiency especially in summer.
[0002]
[Prior art]
As is well known, an air-cooling / cooling system (air conditioner) is composed of an indoor unit installed indoors and an outdoor unit that radiates heat absorbed inside the room to the outside. The means to do it.
[0003]
For this reason, if the outside air temperature of the building rises or the heat exchanger of the outdoor unit is exposed to direct sunlight, the heat radiation characteristics from the heat exchanger will decrease, and the power consumption will worsen. Means that the operation of the air conditioner is stopped.
[0004]
In recent years, the temperature rise in summer has become remarkable, and the cooling efficiency of the air conditioner in summer and the phenomenon of shutting down the operation have been frequently observed. This is because the outdoor unit is installed on the roof of a building such as an office building, and thus the heat exchanger of the outdoor unit is degraded in heat radiation characteristics from the heat exchanger as described above due to a rise in outside air temperature in summer. is there.
[0005]
As a countermeasure, there is a means in which the heat exchanger of the outdoor unit is sprayed or sprinkled with water to cool the heat exchanger of the outdoor unit, thereby improving the heat radiation characteristics of the heat exchanger.
[0006]
[Patent Document 1]
JP 2000-274843 A
[Problems to be solved by the invention]
As a conventional countermeasure device, in order to spray or sprinkle water to the heat exchanger of the outdoor unit, clogging occurs in the nozzle to spray or sprinkle under the influence of calcium ions contained in the water, Water is not sprayed or sprinkled on the heat exchanger of the outdoor unit. For this reason, the heat radiation characteristic of the heat exchanger is reduced, which may cause a decrease in cooling efficiency.
[0008]
Further, since water is sprayed or sprinkled on the heat exchanger of the outdoor unit, scale components in the water adhere to the heat exchanger, particularly the fins, and it is necessary to remove the scale components. Since the outdoor unit is usually installed on the roof of a building or the like, there is also a troublesome work to climb the roof each time for clogging of the nozzle and removal of scale components.
[0009]
The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a cooling system that does not cause clogging of a water spray nozzle and that simplifies work.
[0010]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides an outdoor unit for cooling installed on the roof of a building, a light-shielding member that blocks direct sunlight to a heat exchanger of the outdoor unit, and heat exchange between the outdoor unit. A spray device that is disposed along the vessel surface and sprays soft water to the heat exchanger, a soft water generator that supplies soft water to the spray device through a supply pipe, and is inserted into the supply pipe. When the outside air temperature of the building reaches a certain level or higher, it is opened to allow the soft water generated by the soft water generator to pass, and when the outside air temperature reaches a certain level or less, it is closed and shuts off the passage of the soft water. And an opening / closing control valve.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual configuration diagram showing an embodiment of the present invention, and FIG. 2 is a system configuration diagram of the embodiment.
[0012]
In FIG. 1, an air-cooling / cooling system (air conditioner) is installed in a building 11 such as a building. In the air conditioner, indoor units 12a, 12b, and 12c are installed in the building 11, and on the roof, air-cooled outdoor units (hereinafter, referred to as outdoor units) 13a to 13c (the outdoor units are provided corresponding to the indoor units). ) Is installed via the refrigerant pipe 10.
[0013]
As shown in FIG. 2, the outdoor units 13a to 13c are provided with water spray devices 14a to 14c along the heat exchanger surfaces of the outdoor units 13a to 13b. A plurality of nozzles 15a to 15c for spraying water (this water uses soft water described later) toward the heat exchanger are formed in the water spray devices 14a to 14c.
[0014]
Soft water for spraying is supplied to the water spray devices 14a to 14c from soft water supply pipes 16a to 16c. The soft water supply pipes 16a to 16c are connected to a common soft water supply pipe 17, and then connected to a soft water generator 20 via an electromagnetic valve 19 that is controlled to open and close by a temperature sensor 18. The soft water generator 20 is connected to a water supply pipe via a pressure pump 21 as necessary.
[0015]
Light-shielding net members 22a to 22c are provided between the outdoor units 13a to 13c so that the heat exchangers of the outdoor units are not irradiated with direct sunlight as much as possible to improve the heat radiation characteristics of the heat exchangers. The light shielding net members 22a to 22c are supported and fixed by means (not shown).
[0016]
In the embodiment configured as described above, for example, when the outside air temperature of the building 11 becomes a high temperature of 30 ° C. or more, the heat radiation characteristics of the heat exchangers of the outdoor units 13a to 13c decrease, and the cooling efficiency also deteriorates. .
[0017]
Then, the temperature sensor 18 sends a signal for operating the solenoid valve 19 in response to the outside air temperature. When the solenoid valve 19 operates, the soft water from the soft water generator 20 is supplied from the solenoid valve 19 to the soft water supply pipes 16a to 16c via the common soft water supply pipe 17. Thereafter, the soft water is sprayed from the nozzles 15a to 15c of the water spray devices 14a to 14c to the heat exchangers of the outdoor units 13a to 13c.
[0018]
The heat exchanger temporarily recovers the heat radiation characteristics with the heat of evaporation of the sprayed soft water, and also recovers the cooling efficiency. At this time, the function of the light-shielding net members 22a to 22c that prevents direct sunlight from being applied to the heat exchangers of the outdoor units 13a to 13c also acts, so that the performance of the heat radiation characteristics of the heat exchanger can be reliably maintained.
[0019]
By using soft water as the water to be sprayed as described above, clogging of the nozzle of the water spraying device can be prevented, and scale components do not adhere to the fins of the heat exchanger.
[0020]
【The invention's effect】
As described above, according to the present invention, there is an advantage that work can be simplified because clogging does not occur in the nozzle for water spraying and work on the roof is unnecessary. .
[Brief description of the drawings]
FIG. 1 is a conceptual configuration diagram showing an embodiment of the present invention.
FIG. 2 is a system configuration diagram of the embodiment.
[Explanation of symbols]
11 building 12a-12c indoor unit 13a-13c outdoor unit 14a-14b water spray device 15a-15c nozzle 16a-16c soft water supply line 18 temperature sensor 19 solenoid valve 20 soft water generator 22a- 22c: Light shielding net member

Claims (1)

An outdoor unit for cooling installed on the roof of the building,
A light-blocking member that blocks direct sunlight to the heat exchanger of the outdoor unit,
A spray device that is disposed along a heat exchanger surface of the outdoor unit and sprays soft water on the heat exchanger;
A soft water generator for supplying soft water to the spray device through a supply line;
It is inserted in the supply pipe and is opened when the outside air temperature of the building reaches a certain level or higher, and allows the soft water generated by the soft water generator to pass through, and closed when the outside air temperature reaches a certain level or lower. An opening / closing control valve configured to shut off passage of soft water.

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