JPH03236533A - Water-cooled cooling device of refrigerating machine - Google Patents

Abstract

PURPOSE:To make a cooling tower small in size by a method wherein back-flow water of water facilities is thrown on a heat exchanger of a second cooling- water passage system disposed above the surface of impounded water of the water facilities and part of the back-flow water is made to absorb the latent heat of vaporization from cooling water flowing through the heat exchanger and to vaporize. CONSTITUTION:In a time zone wherein a fountain 20 for enjoyment is to be operated naturally, one solenoid operated three-way valve 36 makes open the cooling water piping 22b side on the lead-out side from a heat exchanger 24 and closes a cooling water piping 18a on the upstream side from a heat absorber 12, the other solenoid operated three-way valve 38 makes the bypass piping side opened and the cooling water piping 18b side on the upstream side from a cooling tower 14 closed. Back-flow water of the fountain 20 for enjoyment is spouted into the air from a nozzle 25 and thrown on the heat exchanger 24 and then it is impounded in a fountain pond 26. When the water is thrown on the heat exchanger 24, part of it absorbs the heat of vaporization from cooling water through the heat exchanger 24 and vaporizes, cooling down the cooling water in this process.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a water-cooled cooling device for a refrigerator, and in particular, a part or all of high-temperature cooling water that has absorbed the condensation heat of the refrigerator is cooled by a fountain or the like. The present invention relates to an improvement in a water-cooled cooling device for a refrigerator, which is cooled by an ornamental water facility such as a waterfall, so that the size of the cooling tower can be reduced as much as possible and the running cost can be reduced.

(Conventional technology) Conventionally, as a cooling device that absorbs the condensation heat of a refrigerator,
Water-cooled types are often used. This water-cooled cooling system connects a heat absorber, which uses cooling water to absorb the condensation heat emitted from the condenser of the refrigerator, and a cooling tower (radiator), which cools the high-temperature cooling water, in a ring shape using cooling water piping. Generally, the cooling water is circulated by a main pump installed in the cooling water piping system.

However, building cooling systems and ice plants.

Alternatively, in large refrigerators used in cold storage warehouses, etc., the amount of condensation heat emitted from the condenser is large, and therefore the cooling capacity of the water-cooled cooling device must also be increased. Therefore, in conventional systems that use cooling towers as radiators, not only the cooling tower but also the water pump attached to it become large, requiring a large installation space, and the equipment There were problems such as high construction costs. In addition, especially in the case of water-cooled cooling devices for refrigerators in building cooling systems, it is difficult to secure installation space for cooling towers, water pumps, and the like.

On the other hand, as a solution to the above problems,
As shown in Publication No. 0-59488, etc., the high temperature cooling water flowing out from the heat absorber is guided to the nozzle of the ornamental fountain installed in the public space around the building, and the fountain facility is cooled. A cooling device is known that is used as a radiator instead of a tower and circulates cooling water. In other words, if you use fountains like this, you can eliminate the need for a cooling tower.
It is possible to reduce equipment costs, construction costs, and save space.

(Problems to be Solved by the Invention) However, in a cooling system that uses an ornamental fountain facility as a radiator as described above, it is necessary to keep the fountain facility in operation while the refrigerator is in operation.

However, the original operating hours of the fountain facility and the operating hours of the refrigerator do not necessarily match, so running the fountain facility when it is not supposed to be operating can significantly increase running costs such as electricity costs. This resulted in an increase in the number of digits, making it impractical.

The present invention was made in view of the above circumstances, and its purpose is to reduce the size of the cooling tower by using water facilities such as ornamental fountains in combination with the cooling tower, thereby saving space. An object of the present invention is to provide a water-cooled cooling device for a refrigerator, which can reduce equipment costs, construction costs, and running costs as much as possible.

(Means for Solving the Problems) In order to achieve the above object, the present invention has a cooling system that circulates the cooling water in the heat absorber, which has become high temperature by absorbing the condensation heat of the refrigerator, through the cooling tower. 1 cooling water passage system, and a heat exchanger formed by branching from the first cooling water passage system, disposed above the water storage surface of an ornamental water facility such as a fountain, and sprayed with return water of the ornamental water facility. The second part circulates high-temperature cooling water through the container.
a cooling water passage system, and a flow rate adjustment means that is interposed in the first and second cooling water passage systems and adjusts the flow rate of cooling water flowing to the cooling tower side and the flow rate of cooling water flowing to the ornamental water facility side. and,
This constitutes a water-cooled cooling system for the refrigerator.

(Function) During the day, when ornamental water facilities such as fountains and waterfalls are in operation, cooling water is circulated through the second cooling water passage system. At this time, a second pipe installed above the water storage surface of the water facility concerned
The heat exchanger in the cooling water passage system is flooded with return water from the water facility, and some of the return water evaporates by taking away the latent heat of evaporation from the cooling water flowing inside the heat exchanger. Cooling water is cooled. In addition, in situations where the outside temperature is extremely high, such as under the scorching sun, and the cooling efficiency of the cooling water from the ornamental water facility decreases, or where the condensation heat generated by the refrigerator increases, it is necessary to Cooling water is circulated through both the second cooling water passage system on the installed heat exchanger side and the first cooling water passage system on the cooling tower side to increase their cooling capacity. On the other hand, during times when the ornamental water facility is not in operation, such as at night, cooling water is circulated only through the first cooling water passage system on the cooling tower side.

If the outside temperature is relatively low and the cooling efficiency is high, such as at night, a small cooling tower with a small capacity can sufficiently cool the cooling water.

(Embodiment) A preferred embodiment of the water-cooled cooling device for a refrigerator according to the present invention will be described in detail below with reference to the accompanying drawings.

In FIG. 1, reference numeral 2 denotes a refrigerator used in a building's cooling system, and a condenser 4 of this refrigerator 2 is configured so that a water-cooled cooling device 6 absorbs the condensation heat of a refrigerant.

This cooling device 6 has a first cooling water passage system 8 and a second cooling water passage system 10. The first cooling water passage system 8 is
A heat absorber 12 that absorbs condensation heat emitted from the condenser 4 with cooling water, a cooling tower 14 as a radiator that cools the high-temperature cooling water by radiating heat, and a water pump attached to this cooling tower. 15, a main pump 16 that circulates cooling water, and a cooling water pipe 18 that connects these heat absorbers 12, the cooling tower 14, the main pump 16, etc. in an annular manner.

Further, the second cooling water passage system 10 is formed to be branched from the first cooling water passage system 8. This second cooling water passage system 10 is located above the water storage surface of a fountain pond 26 of an ornamental fountain 20 provided in an outdoor public space such as around a building, and is arranged so as to be located above the water storage surface of a fountain pond 26 of an ornamental fountain 20 provided in an outdoor public space such as around a building. It consists of a heat exchanger 24 to which reflux water is sprayed into the air from 25, and a cooling water pipe 22 that circulates cooling water to the heat exchanger 24. In the illustrated example, cooling water piping 22 circulates cooling water to the heat exchanger 24.
is branched or connected from the cooling water pipe 18a of the first cooling water passage system 8 that connects the heat absorber 12 and the cooling tower 14, and the heat exchanger 24 is connected to the cooling water pipe 18a of the heat absorber 12 through the inlet side cooling water pipe 22a. High-temperature cooling water flowing out from the downstream side is guided, while cooling water flowing out from the heat exchanger 24 passes through the outlet cooling water piping 22b to the introduction cooling water piping 2.
The cooling water pipe 18a is connected to the cooling water pipe 18a on the downstream side of the branch part 2a.

In addition, the cooling water pipe 18a downstream of the connection part of the outlet side cooling water pipe 22b is connected to the cooling water pipe 18b downstream of the cooling tower 14 and upstream of the pump 16, and A bypass piping 30 is connected to bypass the.

In addition, the first cooling water passage system 8 and the second cooling water passage system 10 have a cooling water flow rate flowing to the cooling tower 14 side and a cooling water flow rate flowing to the heat exchanger 24 disposed on the ornamental fountain 20 side. A flow rate adjustment means 32 is provided to adjust the flow rate. In this embodiment, the flow rate adjustment means 32 is an electromagnetic three-way valve 36 provided at the connection between the outlet side cooling water pipe 22b and the cooling water pipe 18a.
and an electromagnetic three-way valve 38 provided at the connection between the bypass pipe 30 and the cooling water pipe 18b.
The distribution route of the cooling water is mainly switched depending on the cooling load of the fountain 20 and the operating time of the ornamental fountain 20.

In other words, during times when the ornamental fountain 20 should normally be operated, such as during the day, cooling water is transferred from the heat absorber 12 to the ornamental fountain 20.
After being guided to the heat exchanger 24 disposed on the zero side, the second cooling water passage system 10 leading to the pump 16 is made to circulate.

That is, in this case, one electromagnetic three-way valve 36 opens the cooling water pipe 22b on the outlet side from the heat exchanger 24 and closes the cooling water pipe 18a on the upstream side from the heat absorber 12, and the other electromagnetic three-way valve The three-way valve 38 opens the bypass piping 30 side and connects the cooling water piping 1 on the upstream side from the cooling tower 14.
Close the 8b side.

The time when this ornamental fountain 20 is operated generally corresponds to a time when the cooling load applied to the refrigerator 2 is relatively high, and the return water of the ornamental fountain 20 is blown up into the air from the nozzle 25 and heated up. After being sprayed on the exchanger 24, the fountain pond 2
6, but when it is poured onto the heat exchanger 24, a part of it takes the heat of vaporization from the cooling water through the heat exchanger 24 and evaporates, thereby cooling the cooling water. , its cooling capacity is relatively high.

In addition, during times when the ornamental fountain 20 is not normally operated, such as at night, after the cooling water is guided from the heat absorber 12 to the cooling tower 14,
The first cooling passage system 8 leading to the pump 16 is made to circulate. That is, in this case, one electromagnetic three-way valve 36
Opens the cooling water pipe 18a side on the upstream side of the heat absorber 12 side and closes the outlet side cooling water pipe 22b side,
The other electromagnetic three-way valve 38 opens the upstream side of the cooling water pipe 18b from the cooling tower 14 and closes the side of the bypass pipe 30. The hours when the operation of the ornamental fountain 20 is stopped are as follows:
Under conditions such as nighttime, when the outside temperature is relatively low and the cooling efficiency is generally high and the cooling load applied to the refrigerator 2 is low, the cooling capacity of the cooling tower 14 may be low enough. Therefore, the cooling tower 14 can be made smaller by having a smaller capacity.

Also, when the outside temperature is very high, such as during the scorching sun during the day,
Generally, under conditions where the cooling efficiency decreases and the cooling load on the refrigerator 2 increases, the chilled water is guided from the heat absorber 12 to the heat exchanger 24 on the ornamental fountain 20 side, and then further guided to the cooling tower 14. The cooling capacity is improved by circulating the combined path of both the first cooling water passage system 8 and the second cooling water passage system 10 leading to the pump 16. That is, in this case, the electromagnetic three-way valve 36 is connected to the outlet side cooling water pipe 22.
At the same time, switch the electromagnetic three-way valve 38 to the cooling tower 1.
4 to the upstream cooling water pipe 18b side.

Therefore, in the cooling device 6 constructed in this manner, the ornamental fountain 20 is actively used as a radiator during its original operation hours, while the cooling tower 14 is used during the hours when the ornamental fountain 20 is not normally operated. As mentioned above, the cooling capacity of the cooling tower 14 is set to be low because it is used as an auxiliary device when the outside temperature is extremely high, such as under the scorching sun, reducing cooling efficiency and increasing the cooling load. However, the capacity of the cooling tower 14 and the water pump 15 attached thereto can be reduced to make them as compact as possible. Therefore, not only can costs such as equipment costs and construction costs for the cooling tower 14 and the water pump 15 be reduced as much as possible, but also the installation space thereof can be reduced as much as possible. Furthermore, it is possible to reduce running costs such as the overall power cost for operating the cooling tower 14 and the ornamental fountain 20 as much as possible.

In addition, when using the ornamental fountain 20 and the cooling tower 14 at the same time by using the electromagnetic three-way valves 36 and 38 as mixing taps, for example, the flow rate of the cooling water flowing to the ornamental fountain 20 side and the cooling tower 14 side are different. The temperature of the cooling water flowing into the heat absorber 12 may be controlled with higher accuracy by actively adjusting the flow rate of the cooling water flowing into the heat absorber 12. Furthermore, in the illustrated embodiment, the ornamental fountain 20 is used as a radiator, but
Of course, a water film such as an ornamental waterfall may be used as a radiator.

(Effects) In summary, according to the present invention, there is provided a first cooling water passage system that circulates and cools the cooling water in the heat absorber, which has become high temperature by absorbing the condensation heat of the refrigerator, through the cooling tower; A second cooling water passage system that is branched from the first cooling water passage system and circulates high-temperature cooling water to a heat exchanger that is disposed above the storage surface of the return water of an ornamental water facility such as a fountain and is sprayed with the return water. 2 cooling water passage system, a cooling water flow rate that is interposed between the first and second cooling water passage systems and flowing to the first cooling water passage system side on the cooling tower side, and a second cooling water passage system. Since the water-cooled cooling device for the refrigerator is equipped with a flow rate adjusting means for adjusting the flow rate of cooling water flowing to the heat exchanger side, the following excellent effects can be achieved.

(1) While ornamental water facilities such as fountains and waterfalls can be actively used as radiators during their normal operating hours, cooling towers can be used during hours when ornamental water facilities are not normally operating or when the outside temperature is It can be used auxiliary when the cooling efficiency is very high and the cooling load increases.

(2) Therefore, the cooling capacity of the cooling tower can be set lower,
This makes it possible to reduce the capacity of the cooling tower and make it as compact as possible, which not only makes it possible to reduce equipment costs, construction costs, etc. for the cooling tower as much as possible, but also reduces the cost of its installation. This makes it possible to reduce the space as much as possible.

(3) Furthermore, it becomes possible to reduce as much as possible the running costs such as the overall electric power costs for operating the cooling tower and the ornamental water facility.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram of a preferred embodiment of a water-cooled cooling device for a refrigerator according to the present invention. 2... Refrigerator 4... Condenser 6... Cooling device 8... First cooling water passage system 10... Second Cooling water passage system 12... Heat absorber 14... Cooling tower 16... Pump 18... Cooling water piping 20... Ornamental water Facility fountain 22
... Cooling water piping 24 ... Heat exchanger 2
5... Nozzle 26... Fountain pond 30... Bypass piping 32... Flow rate adjustment means

Claims (1)

[Scope of Claims] A first cooling water passage system that circulates cooling water in a heat absorber that has become high temperature by absorbing condensation heat of a refrigerator to a cooling tower to cool it; and the first cooling water passage system. A second cooling water passage that is branched from the system and circulates high-temperature cooling water to a heat exchanger that is disposed above the water surface of an ornamental water facility such as a fountain and is sprayed with return water from the ornamental water facility. and a flow rate adjustment means that is interposed in the first and second cooling water passage systems and adjusts the flow rate of cooling water flowing to the cooling tower side and the flow rate of cooling water flowing to the ornamental water facility side. A water-cooled cooling device for a refrigerator, which is characterized by: