JPH078969Y2 - Thaw - Google Patents

Description

[Detailed Description of the Invention] << Industrial Application Field >> The present invention relates to an ice-melting device, and is used, for example, in a cooling system using ice water, which is installed in the middle of a line connecting an ice storage tank and a cooling load. It relates to an ice-melting device.

<< Prior Art >> In a cooling system for cooling and dehumidifying a house, a building, etc., in recent years, a system utilizing latent heat of ice as a cooling heat has been increasing.

In this system, cold heat is accumulated as ice blocks or ice pieces in the ice heat storage tank, the cold heat is taken out as cold water or ice piece mixed water, and the cold heat is circulated to a cooling load such as a cooler or a heat exchanger.

Of these, the method in which ice pieces are stored in the ice heat storage tank and the ice piece mixed water is directly circulated to the cooling load can directly use the latent heat of the ice in the cooling load. There is an advantage that the difference between the inlet temperature and the outlet temperature) can be increased, and as a result, the piping, pump, etc. can be significantly reduced.

This method is shown in FIG.

In the figure, the ice pieces accumulated in the ice heat storage tank 1 are taken out together with the cold water in the ice heat storage tank 1 by the pump 2, and the mixture of the ice pieces and the cold water, that is, the ice piece mixed water is supplied to the cooling load 3. It is sent and used as cold heat. After that, it is returned to the ice heat storage tank 1 via the flow rate control valve 5 which operates by the signal from the thermometer 4.

Then, the outlet temperature of the cooling load 3 is a predetermined temperature (12 to 15 ° C)
When the temperature exceeds, the flow rate control valve 5 is opened and returned to the ice heat storage tank 1, and at the same time, the ice piece mixed water is sent from the ice heat storage tank 1 to the cooling load 3.

On the contrary, when the outlet temperature becomes equal to or lower than the predetermined temperature, the flow rate control valve 5 is closed to keep the ice piece mixed water in the cooling load 3 and perform heat exchange there.

<Problems to be solved by the invention> However, in the above-mentioned conventional method of circulating the ice piece mixed water directly to the cooling load 3, the ice pieces are blocked inside the pipes in the cooling load 3 or at the connection portion of the pipes. There are problems such as a decrease in capacity and sometimes an accident that stops the operation of the equipment.

In order to prevent such a problem, it is conceivable to increase the diameter of the coil pipe in the cooling load 3. However, this measure can significantly reduce the size of the pipes and pumps described above, which is a direct circulation type of ice-flake mixed water. Forfeit the benefits.

Therefore, the present invention has been made for the purpose of proposing an ice thawing device that can more effectively exhibit the advantages of the direct circulation system of ice piece mixed water.

<< Means for Solving the Problems >> In order to achieve the above-mentioned object, the thaw apparatus according to the present invention comprises:
The ice piece mixed water inflow pipe and the cold water outflow pipe are respectively connected to the front and rear ends of the cylindrical ice melting device main body, and the tip of the ice piece mixed water inflow pipe is extended into the main body to expand the diameter of the main body. It is connected to an inner wall, which divides the inside of the body of the thaw apparatus into a water chamber and an ice piece mixing water chamber, and a small hole is bored in the tip portion to allow the two chambers to communicate with each other. A water inflow pipe communicating with the outlet of the cooling load via a pump was connected to this, and an ice water separation filter was arranged in the ice piece mixed water chamber so as to block the flow of ice pieces.

Further, preferably, the small hole is provided with a cylindrical nozzle projecting to the ice piece mixed water chamber side.

<< Operation >> Ice piece mixed water is introduced into the ice piece mixed water chamber from the ice piece mixed water inflow pipe, and water is introduced into the water chamber from the water inflow pipe through a pump.

Water in the water chamber enters the ice piece mixing chamber through a small hole formed at the tip of the ice piece mixed water inflow pipe, and contributes to melting of the ice pieces.

The cold water obtained by thawing the ice pieces is separated into ice water together with the cold water mixed with the ice pieces and introduced into the ice piece mixing water chamber or the water flowing from the water chamber into the ice piece mixing water chamber through the small holes. It reaches the cold water outflow pipe through the filter for water and is taken out of the device and sent to the cold heat utilization system.

Further, the ice water separation filter prevents unmelted ice pieces in the ice piece mixture water chamber from flowing out of the device through the cold water outlet.

On the other hand, when a cylindrical nozzle is provided in the large number of small holes, the water in the water chamber spouts into the ice piece mixing water chamber and collides with the ice pieces, so melting of the ice pieces proceeds more efficiently, At the same time, the action of smoothing outflow of cold water from the cold water outflow pipe can be obtained.

<< Embodiment >> FIG. 1 (A) and its sectional view taken along the line AA 'in FIG. 1 (B) show a preferred embodiment of the thaw apparatus according to the present invention.

As shown in the figure, an ice piece mixed water inflow pipe 11 is provided on one flat side surface 10a of the cylindrical defroster main body 10, and a cold water outflow pipe 12 is provided on the other flat side surface 10b. An ice water separation filter 13 is provided inside the cylindrical body in the vicinity.

Further, the tip portion 11a of the ice piece mixed water inflow pipe 11 is formed in a flare shape in which the diameter is gradually expanded, and the end portion thereof is the main body of the thaw device.
It is joined to the inner wall 10c of 10. Further, a large number of small holes 14 are formed in the flared tip portion 11a.

Then, the inside of the thaw device main body 10 is divided into an ice piece mixture water chamber α and a water chamber β at the tip portion 11a.

Furthermore, a water inflow pipe 16 is provided on the side wall of the water chamber β.

Further, in the present embodiment, a large number of small holes 14 formed in the tip portion 11a of the ice piece mixed water inflow pipe 11 are provided with cylindrical nozzles slightly projected to the ice piece mixed water chamber α side. There is. The tubular nozzle may be a small cylinder attached to the small hole 14 by welding or other means, or may be integrally formed by pressing the tip 11a. Good.

FIG. 2 shows an example in which the deicer according to the present invention configured as described above is used in a cooling system using cold water.

The operation of the ice-melting device having the above configuration will be described with reference to the cooling system shown in FIG.

A predetermined amount of ice piece mixed water has been sent from the ice heat storage tank 1 to the ice-melting apparatus main body 10 in advance by the pump 2.

The ice piece mixed water flows from the ice piece mixed water inflow pipe 11 into the ice piece mixed water chamber α in the main body 10 of the ice melting device.

Only the cold water in the ice piece mixed water chamber α is the ice water separating filter 13
Through the cold water outflow pipe 12 and sent to the cooling load 3.

At the outlet of the cold water outflow pipe 12, when the temperature of the cold water is measured by the thermometer 6 and is below a predetermined temperature (for example, 2 ° C.), the pump 7 is operated and the outlet water of the cooling load 3 is sucked by the pump 7. Then, the water is introduced into the water chamber β of the defroster main body 10 through the water inflow pipe 16. And the introduced water is the ice piece mixed water inflow pipe.
The ice piece mixed water chamber α is passed through a small hole 14 formed at the tip of 11
Is flowed into. At this time, the outlet water of the cooling load 3 has been heated by heat exchange in the cooling load 3, and passes through the tubular nozzles formed in the large number of small holes 14 from the water portion β to mix the ice pieces. The ice pieces are jetted into the chamber α and projected onto the ice pieces to effectively melt the ice pieces by the collision energy and the sensible heat due to the temperature rise.

On the other hand, when the temperature of the chilled water at the outlet of the chilled water outflow pipe 12 exceeds the above-mentioned predetermined temperature, it means that the ice pieces in the body of the defroster 10 are insufficient, so the pump 7 is stopped and the cooling load 3 It prevents the heated outlet water from being introduced into the main body 10 of the defroster.

At this time, the check valve 9 provided between the water inflow pipe 16 and the pump 7 prevents the water in the defroster body 10 from flowing back from the water inflow pipe 16 to the pump 7 side.

Further, whether the outlet water from the cooling load 3 is returned to the ice heat storage tank 1 via the flow rate control valve 5 or the orifice 8 is determined by the temperature of the outlet water.

That is, the temperature of the outlet water of the cooling load 3 is measured by the thermometer 4, and when the temperature is below a predetermined temperature (for example, 15 ° C.), the flow rate control valve 5
Is closed and returned to the ice heat storage tank 1 little by little through the orifice 8.

Since the amount of outlet water that passes through the orifice 8 flows out from the cooling load 3, the thermometer 4 quickly catches the rise in water temperature of the cooling load 3. In addition, the same amount of cold water as this outflow amount is sent from the ice piece mixing water chamber α of the ice-melting device 10 to the cooling load 3 through the cold water outflow pipe 12.

At the same time, the ice piece mixed water in an amount commensurate with this amount of cold water is introduced from the ice heat storage tank 1 by the pump 2 into the ice piece mixed water chamber α of the ice-melting device main body 10 through the ice piece mixed water inflow pipe 11.

When the temperature of the outlet water of the cooling load 3 is equal to or higher than the predetermined temperature, the flow rate control valve 5 is fully opened, and a large amount of the outlet water of the cooling load 3 is returned to the ice heat storage tank 1 via the flow rate control valve 5. .

A large amount of water that flows through the flow rate control valve 5 flows out from the cooling load 3, and a large amount of cold water of the same amount as this outflow amount flows from the ice piece mixture water chamber α of the deicing device body 10 through the cooling water outflow pipe 12 to the cooling load 3 Will be introduced to.

At the same time, the ice piece mixed water in an amount commensurate with this large amount of cold water is introduced from the ice heat storage tank 1 by the pump 2 into the ice piece mixed water chamber α of the ice melting device 10 via the ice piece mixed water inflow pipe 11. .
By doing so, cooling can be efficiently performed.

<< Advantages of the Invention >> According to the defroster according to the present invention described in detail above, the ice pieces can be efficiently and continuously melted, and only the low temperature cold water can be continuously taken out.

Therefore, the following effects can be obtained by using the defroster according to the present invention in a cooling system using ice water.

(1) Since the ice pieces remain inside the defroster and only the cold water is sent to the cooling load, the ice pieces are not clogged inside the cooling load coil or at the connection part, and the cooling capacity is reduced. The situation such as the stop of the operation of the equipment does not occur.

(2) By the above (1), the conventional cooling load can be used as it is.

(3) Cold water having a low temperature and a constant temperature (for example, cold water at 0 to 2 ° C.) can be stably supplied to the cooling load.

(4) Due to the above (1) and (3), the coil tube diameter of the cooling load can be made smaller than that of the conventional one, and as a result, the entire cooling load can be downsized.

(5) Due to the above (1) and (3), the reliability of the cooling load is increased.

[Brief description of drawings]

FIG. 1 is a diagram showing an embodiment of an ice thawing device according to the present invention, and FIG. 2 is a system showing an example of using the ice thawing device according to the present invention shown in FIG. 1 in a cooling system using ice water. Figure, third
The figure is a system diagram showing a conventional cooling system. 10 …… Defroster main body, 11 …… Ice piece mixed water inflow pipe 12 …… Cold water outflow pipe, 13 …… Ice water separation filter 14 …… Small hole, 16 …… Water inflow pipe α …… Ice piece mixed water chamber, β: Water chamber

Claims (2)

[Scope of utility model registration request] 1. An ice piece mixed water inflow pipe and a cold water outflow pipe are respectively connected to front and rear ends of a cylindrical thaw apparatus main body, and a tip end portion of the ice piece mixed water inflow pipe is extended and expanded in the main body. It is connected to the inner wall of the body of the thaw device, thereby dividing the inside of the thaw device body into a water chamber and an ice piece mixed water chamber, and a small hole is bored at the tip to enable the two chambers to communicate with each other. Further, a water inflow pipe communicating with the outlet of the cooling load via a pump is connected to the water chamber, and an ice water separation filter is arranged in the ice piece mixed water chamber so as to block the flow of the ice pieces. Defroster characterized by. 2. The thaw apparatus according to claim 1, wherein the small hole is provided with a cylindrical nozzle protruding toward the ice piece mixed water chamber side.