JPH09509U - Ice storage device for air conditioning - Google Patents

Abstract

(57) 【Abstract】 PROBLEM TO BE SOLVED: To avoid a freezing trouble in a water cooler in an apparatus capable of continuously producing supercooled water of 0 ° C. or less by a water cooler to store ice heat for air conditioning. SOLUTION: A supercooled water production apparatus is provided outside a heat storage water tank for storing heat source water for air conditioning, in which water is continuously passed through a water cooler to continuously take out supercooled water below 0 ° C. Installed in the heat storage water tank, a water supply pipe line for continuously pumping a part of the water in the heat storage water tank to the water cooler is provided, and the continuous flow of the supercooled water flowing out from the water cooler is supercooled to the heat storage water tank. An ice heat storage device for air conditioning, which is provided with a path for returning through the release device or not and through which a water container filled with a filler is inserted in the water supply pipe line.

Description

[Detailed description of the device]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an ice storage device for air conditioning, which stores a cold heat source for cooling in the form of latent heat of ice.

[0002]

[Prior art]

 The so-called ice heat storage method, in which cold heat is stored in the form of latent heat by storing ice in a heat storage water tank for air conditioning, the ice forms to be stored are solid (ice block) and liquid (fine). Ice is suspended in water). Although there are advantages and disadvantages to both methods, the applicant has already proposed Japanese Patent Application No. 62-47770 and Japanese Patent Application No. 62-62681 as a method of storing the so-called sherbet-like ice-water slurry in a heat storage water tank. Japanese Patent Application No. 62-102994, Japanese Patent Application No. 62-228800, Japanese Patent Application No. 62-245930, Japanese Application No. 62-3 0383, Japanese Application No. 62-181176-8, Japanese Application No. 62-192012, etc. In this case, supercooled water cooled to below 0 ° C is produced as a continuous flow, and the supercooled state of the supercooled water in this continuous flow is released instantaneously, so that liquid suitable for heat storage in which fine ice is dispersed is produced. We have proposed an invention for manufacturing ice.

[0003]

[Problems to be solved by the device]

 When supercooled water is made continuously with a water cooler and fine ice is deposited from this continuous flow of supercooled water and stored in a heat storage water tank, as proposed in the above patent application and utility model registration application, Although it is advantageous to circulate and supply the water in the heat storage water tank to the water cooler, if the water supplied to this water cooler is accompanied by fine ice, it causes freezing of the heat transfer tubes of the water cooler. Freezing of such pipelines is the most important issue when continuously producing supercooled water.

[0004] In Japanese Patent Application No. 63-14563 and Japanese Patent Application No. 63-76854, the applicant has proposed a means for solving this problem by combining an ice collecting filter with a turbulent flow generating means for turbulent water flow, We have already proposed a method to insert an ice collection filter for preventing ice recovery on the upstream side of the main filter.

The present invention is also aimed at solving this problem, and is intended to solve this problem by means different from the prior application.

[0006]

[Means for Solving the Problems]

 The present invention is an apparatus for producing supercooled water, in which water is continuously passed through a water cooler to continuously take out supercooled water below 0 ° C, in a heat storage water tank for storing heat source water for air conditioning. Installed outside the tank, provide a water supply pipe for continuously pumping a portion of the water in the heat storage water tank to the water cooler, and provide a continuous flow of supercooled water flowing out of the water cooler to the heat storage water tank. A passage for returning through the subcooling releasing device is provided, and a water container filled with a filler is interposed in the water supply conduit, and further, a water container filled with the filler is provided. In addition to the above, the present invention provides an ice heat storage device for air conditioning, which is characterized by having a heater interposed.

[0007]

[Embodiment of the invention]

 Even if a main filter for purification is installed in the water supply line from the heat storage water tank to the water cooler to prevent the transfer of suspended solids and ice to the water cooler, very fine ice (ice nuclei) If ice nuclei pass through the filter or for some reason in the middle of the path, and flow into the heat transfer pipe of the water cooler that produces supercooled water, this will trigger freezing in the pipe. This ice nucleation can be erased or suppressed to some extent by the heat generated by driving the pump in the water supply line, but this is not a definitive solution and, for example, the heat generated by the pump during the initial startup of the equipment. Relying solely on it is dangerous. Therefore, in the present invention, the above-mentioned problem was solved by interposing a water container filled with a filling material in this water supply pipe and ensuring the agitation of water and the staying time in the pipe. is there.

The contents of the present invention will be specifically described below with reference to the embodiments of the drawings.

FIG. 1 is an embodiment showing the entire ice storage device for air conditioning of the present invention. In the present invention, a large amount of cold heat is stored by storing sherbet-like ice in the heat storage water tank especially during the cooling season, and this ice making is performed by using, for example, night power, and the stored cold heat (that is, Water near 0 ° C) is circulated and supplied to the air conditioners in the building.

In FIG. 1, 1 is a heat storage water tank, 2 is a water cooler, and the water in the heat storage water tank 1 is supplied to a water cooler 2 by a circulation pump 3. That is, a part of the water in the heat storage water tank 1 is continuously supplied to the water cooler 2 by the circulation pump 3 via the water supply pipe line 4, and a continuous flow of supercooled water cooled to below 0 ° C. is produced here. It This continuous flow of supercooled water is discharged into the atmosphere from the pipeline outlet 5 located above the water surface of the heat storage water tank and drops toward the heat storage water tank 1. In practice, it is convenient to install a device that releases the supercooling during the dropping process. In the illustrated example, this supercooling releasing device is composed of a baffle plate 7 which interrupts the continuous flow 6 of the supercooling water discharged in the horizontal direction. That is, when the supercooled water 6 collides with the baffle plate 7, the collision energy releases the supercooled state at an instant, and the ice-water slurry in which fine ice is deposited flies from the baffle plate 7 to the heat storage water tank. To fall.

As the water cooler 2, for example, a shell-and-tube type heat exchanger in which water is passed through the inside of a large number of heat transfer tubes 8 can be used. That is, the shell 9 is partitioned by partition plates 10 and 11 to form a cooling chamber 12, and a large number of heat transfer tubes 8 are penetrated into the cooling chamber 12 to allow water to flow into the heat transfer tubes 8 and to be installed outside the tubes. A coolant is supplied to the cooling chamber 12 to cool the water continuously flowing through the pipe to below 0 ° C. In that case, the refrigeration cycle is configured so that the cooling chamber 12 functions as an evaporator of the heat pump. That is, refrigerant pipes are provided between the compressor 13, the condenser 14, the expansion valve 15 and the evaporator of the cooling chamber 12, and the pressure of the refrigerant evaporated in the cooling chamber 12 is kept constant, so that each heat transfer pipe 8 is It can be cooled to a constant temperature below 0 ° C. Instead of such a refrigeration cycle, brine having a predetermined temperature may be supplied from the refrigerator into the cooling chamber 12.

The inventors of the present invention previously reported in Japanese Patent Application No. 62-271922 that the heat transfer tube 8 was cooled to a temperature at which the tube wall temperature in contact with water did not fall below −5.8 ° C. (but below 0 ° C.). Then, it was clarified that the supercooled water can be continuously produced regardless of the Reynolds number of the water flow (that is, the flow velocity and pipe diameter), the water temperature before being cooled, and the water temperature after being cooled. Therefore, also in the present invention, the temperature of the inner wall of the heat transfer tube 8 in the cooler 2 is controlled to a temperature that does not fall below -5.8 ° C at any point (but below 0 ° C). In this way, the supercooled water is taken out as a continuous flow from the discharge port 5 of each heat transfer tube without freezing in the heat transfer tube 8 in the water cooler 2, but the subcooled water is supplied to the water cooler 2. When fine ice is entrained, this triggers the precipitation of ice from the supercooled water, causing the heat transfer tube 8 to freeze. The primary filter 18 is installed in the tank near the water intake 17 of the water supply line 4, the primary filter 18 collects ice primarily, and the main filter 20 is installed in the water supply line to install the fine filter in the tank. Ice can be collected to some extent, and heat is applied by the operation of the pump 3 to cause a melting action, but it is not yet complete.

According to the present invention, a water container (hereinafter referred to as a filler loading container) 22 in which a filler is loaded is inserted into the water supply conduit 4, and further, a heater 21 is also inserted. This is a solution to this problem. FIG. 1 shows an example in which the filler loading container 22 is inserted, and FIG. 2 shows an example in which the filler loading container 22 and the heater 21 are inserted. It is convenient to use a plug-type heater as shown in FIG. 3 for the heater 21 inserted in the water supply conduit 4. In FIG. 3, 23 is a heating element, 24 is a plug that supports the heating element, and 25 is a cheese part to which this plug-type heater is attached.

The filling material loading container 22 to be inserted into the water supply conduit 4 is a three-dimensional resin molded product molded with a high porosity and filled as a filling material in a container through which water passes, as shown in FIG. An example was shown. In this example, a double cylinder container in which a small cylinder inner cylinder 28 is provided inside a cylindrical container body 27 is used, and a filler 30 is loaded therein. The inner cylinder 28 is attached to a removable lid 29, and the length of the inner cylinder 28 is shorter than the depth of the container body 27. A water supply port 31 is provided in the container body 27, and a drain port 32 is provided at the center of the lid 29 (inside the inner cylinder 28), and these are connected to the pipes of the water supply pipe line 4.

FIG. 5 shows an example of the filled filler 30. As can be seen from this example, bar-shaped resin is formed by being intricately inserted in a three-dimensional direction, and its size is about 2 to 5 mm in outer diameter. This is available on the market as "filler S" manufactured by Mitsubishi Plastics. By loading the packing material 30 having such a large porosity into the container shown in FIG. 4 and inserting it in the water supply pipe line 4, water undergoes a large pressure loss in the process of flowing through this 30 packing material layers. It is turbulent without. The ice nuclei entrained by this turbulent action are melted. The residence time when passing through this container assists this melting. In the case of the container shown in FIG. 4, since it goes around the outside of the inner cylinder 28 and then enters into the inner cylinder 28 from below, a sufficient stay time can be obtained.

6 to 9 show another example of the filler loading container 22. In the example of FIG. 6, a water supply port 31 and a drainage port 32 are provided on the wall of the container body 27 so as to face each other, and a lid 29 is provided with a partition wall 33 that vertically divides the container into two chambers. The water that has entered the room of the above dives under the partition wall 33 and enters the other room. 36 indicates a perforated plate.

In the example of FIG. 7, the bottom of the container body 27 has a double bottom to provide a drain chamber 34, and the water in the container flows into the drain chamber 34 from the perforated plate 36 at the center of the bottom plate 35. In addition to this, an inner cylinder 37 having a length shorter than the height of the container is attached to the center of the bottom plate 35. The water supply port 31 is mounted below the container body, slightly above the drainage chamber 34. As a result, the water that has entered the outside of the inner cylinder 37 in the container from the water supply port 31 rises while swirling, then descends in the inner cylinder 37, and exits from the drainage port 32 via the drainage chamber 34.

The example of FIG. 8 has a structure in which the example of FIG. 4 is turned upside down. That is, an inner cylinder 38 having a length shorter than the container length is attached to the bottom plate 39 of the container main body 27, a drain port 32 is provided at the center of the bottom plate so that water in the inner cylinder 38 can be drained, and a side wall of the container main body 27 is attached. The water supply port 31 is provided below. In this example, the porous plate 36 (which may be a net) is placed at the bottom of the container so that the entire filler 30 is floated from the bottom of the container.

In the example of FIG. 9, a water supply channel 41 and a drainage channel 42 are provided so as to extend to the inside of the container main body 27, and the water supply channel 41 and the drainage channel 42 are also filled with the filler 30. .

In each of the filling material loading containers 22 shown in FIGS. 4 and 6 to 9, a bending path of water is formed in the container, and the filling material 30 is loaded in the bending path. Therefore, the water that flows through this has a sufficient residence time and a large turbulence effect during that time. As a result, even when water accompanied by ice nuclei flows in, it can be melted. Moreover, the maintenance operation can be easily performed by removing the lid 29.

When such a filler loading container 22 is provided and a heater 21 is further provided in the water supply line 4 as shown in FIG. 2, the filler loading container 22 and / or the heater 21 are inserted. The position is preferably on the downstream side of the pump 3, but may be on the upstream side of the pump 3 in some cases. In any case, it is better to install it in the vicinity of the water tank as far as possible from the water cooler 2. Further, it is convenient to use a cartridge type filter as the main filter 20.

[0022]

[Effect of the invention]

 As described above, according to the present invention, when sherbet-like ice is made from supercooled water to store heat for air conditioning, the problem of freezing the heat transfer pipe during supercooled water production can be solved by a simple configuration, and the sherbet-like Ice can be manufactured stably.

[Brief description of drawings]

FIG. 1 is a system layout diagram showing an embodiment of an ice heat storage device for air conditioning of the present invention.

FIG. 2 is a diagram showing another example of the structure of the water supply pipe line portion to the water cooler in the apparatus of FIG.

3 is a schematic cross-sectional view of a heater used in the device of FIG.

FIG. 4 is a schematic cross-sectional view of a filler loading container used in the apparatus of FIG.

FIG. 5 is a perspective view showing an example of a filler used in the present invention.

6 is a schematic cross-sectional view showing another example of the filler loading container used in the apparatus of FIG.

FIG. 7 is a schematic cross-sectional view showing another example of the filler loading container used in the apparatus of FIG.

8 is a schematic cross-sectional view showing another example of the filler loading container used in the apparatus of FIG.

9 is a schematic cross-sectional view showing another example of the filler loading container used in the apparatus of FIG.

[Explanation of symbols]

 1 Heat Storage Water Tank 2 Water Cooler 3 Circulation Pump 4 Water Supply Pipeline 5 Supercooled Water Discharge Port 7 Supercooling Release Device 8 Heat Transfer Tube 18 Primary Filter 20 Main Filter 21 Heater 22 Filler Loading Container 30 Filler

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Sakae Kikuchi 3001-27 Shimotsuruma, Yamato-shi, Kanagawa Prefecture (72) Masato Nakanishi 3-20-9 Nishiokuda, Tama-ku, Kawasaki City, Kanagawa Prefecture (72) Masayuki Tanino 3-20-9 Nishi-Ikuta, Tama-ku, Kawasaki-shi, Kanagawa

Claims (4)

[Utility model registration claims] 1. A subcooled water producing apparatus for continuously supplying water to a water cooler to continuously take out supercooled water at a temperature of 0 ° C. or less, and a tank of a heat storage water tank for storing heat source water for air conditioning. The water storage pipe is installed outside, and a water supply pipe for continuously pumping a part of the water in the heat storage water tank to the water cooler is provided, and a continuous flow of supercooled water flowing out from the water cooler is passed to the heat storage water tank. An ice heat storage device for air conditioning, which is provided with a path for returning through a cooling release device or not and through which a water container filled with a filler is inserted in the water supply pipe line. 2. A subcooled water production apparatus for continuously supplying water to a water cooler to continuously take out supercooled water at a temperature of 0 ° C. or lower, and a tank of a heat storage water tank for storing heat source water for air conditioning. The water storage pipe is installed outside, and a water supply pipe for continuously pumping a part of the water in the heat storage water tank to the water cooler is provided, and a continuous flow of supercooled water flowing out from the water cooler is passed to the heat storage water tank. An ice heat storage device for air conditioning, which is provided with a route for returning through a cooling release device or not and in which a water container filled with a filling material and a heater are provided in the water supply pipe line. 3. The water container has a curved water passage formed therein, and a filler is loaded in the bent water passage.
Or the ice heat storage device for air conditioning according to 2. 4. The ice heat storage device for air conditioning according to claim 1, further comprising a filter installed in the water passage.