JPH06229592A - Storage type water cooling apparatus - Google Patents

Abstract

PURPOSE:To reduce the running cost by utilizing the midnight power. CONSTITUTION:In a storage type water cooling apparatus comprising a heat storage water tank 3 and a water subcooling apparatus, a substantially L-shaped downcast pipe 4 is provided for receiving water having been subcooled by a heat exchanger 2 in the water subcooling apparatus. One end of the downcast pipe 4 is inserted into a lower area within the heat storage water tank 3, and a water feed pump 5 is provided midway the downcast pipe 4. A chilled water intake port 4a is opened in the vicinity of an outlet of the downcast pipe 4, and a chilled water intake line 6 is connected to the chilled water intake port 4a. Furthermore, a wire gauze 10 is provided at a position below an upper limit level in the heat storage water tank 3 to suppress floating of ice. Storage of ice is effected by utilizing the midnight power.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat storage type cold water supply device for supplying cold water to an air conditioner, a food cooling device and the like.

[0002]

2. Description of the Related Art FIG. 3 shows a conventional general cold water device.
As shown in, the water stored in the tank 31 is circulated to the circulation line 32.
Cooling water in the heat exchanger 33 via the heat exchanger 33 and supplying it from the cold water outlet 34 when it reaches a predetermined temperature, or as shown in FIG. There is known a structure in which the amount of heat is stored by utilizing the heat and the heat is radiated according to the demand of the load. In the figure, 35 is a refrigerator and 36 is a brine tank. However, in such a chilled water system, in order to satisfy the maximum demand of chilled water, the water storage tank should be made large, or the capacity of the refrigeration system should be increased to provide a cooling system that is sufficient for the supply amount. It is necessary to have the ability, and there are problems in terms of space and economy.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, the present invention is a heat storage type in which ice obtained by a supercooled water producing apparatus is stored in a heat storage water tank and cold water is supplied according to load demand. It is intended to provide a chilled water device.

[0004]

That is, the present invention relates to a heat storage type cold water device comprising a heat storage water tank and a supercooling water manufacturing device, and is supercooled outside the heat storage water tank by a heat exchanger of the supercooling water manufacturing device. A substantially L-shaped precipitation pipe for receiving the collected water is provided, one end of the precipitation pipe is inserted in the lower part of the heat storage water tank, a water supply pump is provided in the middle of the precipitation pipe, and cold water intake is provided near the outlet of the precipitation pipe. It is characterized in that a mouth is opened, a cold water intake line is connected to the cold water intake, and a wire net for suppressing the floating of ice is provided below the upper limit water level of the heat storage water tank.

[0005]

According to the present invention, the supercooled water generated in the heat exchanger is caused to flow into the precipitation pipe, and the supercooled water is pumped to the lower part of the heat storage water tank by the water supply pump, whereby Part of the ice cubes is fragmented, and the ice fragmented ice rises in the heat storage water tank. However, since it is suppressed by the wire mesh provided above and the ice is sequentially accumulated downward, the filling rate of ice can be increased.
On the other hand, since the cold water is supplied from the vicinity of the outlet of the precipitation pipe through the cold water intake line, the cold water having a predetermined water temperature can be stably supplied.

[0006]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic explanatory view of a heat storage type cold water device obtained by applying the present invention. In the figure, 1 is a refrigerator provided with a brine tank of a supercooled water producing apparatus, and 2 is a heat exchanger having a double pipe structure. In the figure, 3 is a heat storage type heat storage water tank according to the present invention. A heat exchanger 2 is arranged outside the heat storage water tank 3, and a precipitation pipe 4 for receiving water supercooled by the heat exchanger 2 is provided in the vicinity of the heat exchanger 2 and one end of the precipitation pipe 4 is provided at a lower portion of the heat storage water tank 3. Have been inserted. The precipitation pipe 4 is formed into a cylindrical shape having a predetermined size that does not hinder the inflow of supercooled water, and is formed into an L shape so that the precipitation pipe 4 can be inserted into the water tank 3 from the lower side of the heat storage water tank 3. is there. Then, a water supply pump 5 is inserted in the middle of the precipitation pipe 4, an intake port 4a is opened in the vicinity of the outlet, and a wire mesh is attached to this opening to separate ice and water when taking out cold water. There is. A cold water extraction line 6 is connected to the water intake 4a, and an electromagnetic valve 7 and a water supply pump 8 are provided in the cold water extraction line 6.

Reference numeral 9 in the drawing is a water level controller, which is provided with an upper electrode rod 9a and a lower electrode rod 9b for controlling the water level in the heat storage water tank 3. A wire net 10 for suppressing the floating of ice is attached to the lower limit water level of the lower electrode rod 9b. 11 in the figure
It is an upper water intake line, 12 is a lower water intake line, both of which are connected to a circulation pump 13.A solenoid valve 14 is inserted in the middle of the upper water intake line 11 and a solenoid valve 15 is inserted in the middle of the lower water intake line 12. There is. Reference numeral 16 in the drawing denotes a cold water circulation line, one end of which is connected to the circulation pump 13 and the other end of which is inserted into the precipitation pipe 4 via the heat exchanger 2.
Reference numeral 17 in the drawing denotes a raw water supply line, which is connected to a tap water or well water supply unit and has a solenoid valve 18 inserted in the middle thereof. Reference numeral 19 in the figure denotes a temperature sensor, which sets a lower limit line 19a of ice to be stored in the heat storage water tank 3.

The refrigerating machine 1 of the supercooled water producing apparatus uses, for example, a system in which a liquefied refrigerant is decompressed by an expansion valve, and then brine is cooled by latent heat of vaporization, and the refrigerating machine 1 is arranged in a brine tank (not shown). It has a heat exchange section. A brine circulation line 20 for introducing internal brine (cooling medium) into the heat exchanger 2 for circulation is connected to the brine tank, and a circulation pump 21 is provided on the way.

As shown in FIG. 2, a part of the heat exchanger 2 has an outer tube 2a formed in a U shape having a predetermined length, and has an uneven shape (commonly called corrugated tube or Benley tube) inside the outer tube 2a. A double pipe structure in which an inner pipe 2b (which may be a straight pipe) is inserted, and brine supplied from a brine tank flows between the outer pipe 2a and the inner pipe 2b, and the heat storage water tank is provided in the inner pipe 2b. The water to be cooled supplied from 3 flows. Therefore, the inner pipe 2b is cooled from the outer periphery to produce supercooled water. In the figure, reference numeral 2c denotes a lid member which seals both ends of the outer tube 2a with the inner tube 2b inside. Further, 2d is a mounting member which is fixed to the outer peripheral portions of the outer pipe 2a and the inner pipe 2b in the vicinity of both ends thereof, and the tip end portions of the brine circulation line 20 and the cold water circulation line 16 are respectively inserted. The above-mentioned devices and solenoid valves are automatically controlled by a controller (not shown) via lines (not shown).

In the above embodiment, the brine was used as the cooling medium, but a refrigerant (for example, CFC) liquefied in the refrigerator 1 is directly passed through the heat exchanger 2 and the latent heat of vaporization of the refrigerant causes the refrigerant to be covered. It is also possible to cool the cooling water into supercooled water. In this case, the water to be cooled is circulated in the outer pipe 2a of the heat exchanger 2, and the refrigerant is circulated in the inner pipe 2b in parallel.

Next, the operation of the heat storage type cold water apparatus of the present invention will be described. First, raw water is supplied to the water level (upper limit water level) of the upper electrode rod 9a in the heat storage water tank 3 through the raw water supply line 17, and the solenoid valve 18 is closed. Next, the refrigerator 1 is driven to cool the brine to a predetermined temperature (about -4 ° C.), and then the brine circulation pump 21 is driven to drive the heat exchanger 2 through the brine circulation line 20 as indicated by an arrow A in FIG. It is introduced into the outer tube 2a. The brine introduced into the outer pipe 2a cools the inner pipe 2b from the outer periphery while circulating in the outer pipe 2a, and cools the water to be cooled in the inner pipe 2b. Then, the brine that has finished flowing through the outer pipe 2a is returned to the brine tank through the brine circulation line 20 as shown by arrow B.

In response to the flow of brine, the water to be cooled in the heat storage water tank 3 is opened from the upper water intake line 11 through the cold water circulation line 16 as shown by arrow C by opening the solenoid valve 14 and driving the circulation pump 13. It is introduced into the inner tube 2b of the heat exchanger 2. The introduced water to be cooled flows in a spiral shape at the uneven portions of the inner pipe 2b. On the other hand, the brine is also the inner tube 2b
Similarly, the water to be cooled in the inner pipe 2b is circulated in a spiral manner on the outer surface thereof to be supercooled water. Then, the supercooled water in the inner pipe 2b flows into the precipitation pipe 4 through the cold water circulation line 16 as shown by an arrow D, and a part thereof is frozen in the precipitation pipe 4.

As described above, the supercooled water that has passed through the inner pipe 2b becomes supercooled water having a temperature below the freezing point temperature (about -2 ° C) when it flows into the precipitation pipe 4, and about 5% of it is Since ice fragments are generated, ice blocks and sherbet-shaped ice will be removed by the water supply pump 5 provided in the middle of the precipitation pipe 4 when continuously operated.
As a result, the water is pumped into the heat storage water tank 3 and pushed upward with the upward flow, but is restrained by the wire mesh attached to the upper part, and ice is sequentially stored downward. Then, when the ice is stored up to the lower limit line 19a of the ice, which is the installation line of the temperature sensor 19 shown in FIG. 1, a temperature below the preset freezing point is detected.
Detected, and notifies the controller (not shown) to stop the operation of the heat storage type chilled water device. In addition, the above-mentioned ice storage operation is performed using late-night power (22:00 to 8:00), which has a low power charge.

When a chilled water supply command is issued from the facility for supplying chilled water, the controller opens the electromagnetic valve 7 of the chilled water extraction line 6 to drive the water supply pump 8 to start the supply of chilled water. When the water level is lowered to the lower electrode rod 9b of the water level controller 9 by the supply of the cold water, the controller restarts the operation of the cold water device by the signal from the water level controller 9. That is, the electromagnetic valve 18 of the raw water supply line 17 is opened to replenish the raw water, and at the same time, the refrigerator 1 is driven. Then, the electromagnetic valve 15 of the lower water intake line 12 of the heat storage water tank 3 is opened to drive the circulation pump 13 so that the water to be cooled passes through the cold water circulation line 16 and the supercooled water into the precipitation pipe 4 through the heat exchanger 2. Bring to reflux. Cold water is supplied from a cold water intake line 6 connected to the intake 4a of the precipitation pipe 4,
A wire mesh attached to the water intake 6a separates ice and supplies only cold water.

On the other hand, for the replenishment of raw water, water is sprinkled from a plurality of water supply ports 17a of a raw water supply line 17 provided at the uppermost portion of the heat storage water tank 3, and the water is evenly sprinkled on the upper surface of the stored ice. As soon as it dissolves, it becomes cold water. Therefore, even if the supply amount of cold water increases, it is possible to sufficiently cope with the accumulated ice until it melts.

[0016]

As described above, according to the present invention, the wire mesh is attached to the upper part of the heat storage water tank, and the precipitation pipe for receiving the supercooled water generated by the heat exchanger is arranged on the outer side thereof. Since the water pump is inserted in the middle of the pipe and the cold water intake line is connected to the intake port near the outlet, the following effects can be obtained. (1) Since supercooled water from the heat exchanger is supplied to the load side without being mixed with water in the water tank, it is possible to stably supply cryogenic cold water. (2) When storing ice, an upward flow is generated in the heat storage water tank by the pressure of the water pump installed in the precipitation pipe, but the wire mesh provided in the upper part suppresses the floating of the ice, and the ice is sequentially stored below the ice. The filling rate can be increased. (3) Since the ice storage is performed by using the midnight power, the running cost is low and it is possible to cope with the increase in the supply of cold water.

[Brief description of drawings]

FIG. 1 is a schematic explanatory view showing an arrangement of each device of a heat storage type cold water device embodying the present invention.

2 is a partial cross-sectional view showing an enlarged heat exchanger of the heat storage type cold water device of FIG. 1. FIG.

FIG. 3 is a schematic explanatory view of a conventional chilled water device.

FIG. 4 is a schematic explanatory view of a conventional heat storage type cold water device.

[Explanation of symbols]

 2 ... Heat exchanger 3 ... Heat storage water tank 4 ... Precipitation pipe 4a ... Cold water intake port 5 ... Water pump 6 ... Cold water intake line 10 ... Wire mesh

Front Page Continuation (72) Inventor Akiyoshi 7th Horie-cho, Matsuyama City, Ehime Prefecture Miura Industrial Co., Ltd.

Claims (1)

[Claims] 1. A heat storage type cold water device comprising a heat storage water tank 3 and a supercooled water production device, wherein a substantially L-shaped outside of the heat storage water tank 3 receives water supercooled by a heat exchanger 2 of the supercooled water production device. Type precipitation pipe 4 is provided, one end of the precipitation pipe 4 is inserted into the lower part of the heat storage water tank 3, a water supply pump 5 is provided in the middle of the precipitation pipe 4, and a cold water intake port is provided near the outlet of the precipitation pipe 4. 4a is opened, a cold water intake line 6 is connected to the cold water intake port 4a, and a wire mesh 10 for suppressing floating of ice is provided below the upper limit water level of the heat storage water tank 3 to store the cold water. apparatus.