JPH0517471U - Supercooled water production equipment - Google Patents

Abstract

(57) [Summary] [Object] An object of the present invention is to provide a supercooled water producing apparatus capable of stably producing supercooled water by preventing freezing in a water passage. [Constitution] According to the present invention, a fresh water or salt water stored in a tank is introduced to the outside of the tank to continuously flow through it, and then a water passage is returned to the inside of the tank to remove relatively large ice. A first filter for maintaining the temperature of the water at a temperature equal to or higher than the freezing point, a second filter for capturing the ice, and exchanging heat with the water flowing around to melt the ice. A supercooled water producing apparatus is characterized in that a cooling means for cooling water is provided in the above order from upstream to downstream.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an apparatus for producing supercooled water applied to an ice storage tank for an air conditioning system and other ice making equipment.

[0002]

[Prior Art]

 In conventional ice storage tanks and ice-making equipment used for air conditioning systems, supercooled water is manufactured by cooling water continuously drawn from the tank to a water passage to below the freezing point temperature, and then this supercooled water. Sherbet-like ice is manufactured by returning the water to the tank and releasing the supercooled state.

[0003]

[Problems to be solved by the device]

 The above conventional supercooled water producing apparatus has the following problems to be solved.

That is, in the conventional device, the water continuously discharged from the tank to the water passage is cooled to below the freezing point temperature to be supercooled water, and is returned to the tank from another channel only. Since the cooling water is unstable, there is a risk that ice nuclei generated by the inflow of ice crystals in the tank or the shock such as vibration in the water passage may become seeds and freeze the water passage. There was a problem that it could not be stably manufactured.

An object of the present invention is to provide a device for stably producing supercooled water while avoiding freezing in the water passage.

[0006]

[Means for Solving the Problems]

 The present invention intends to provide an apparatus for producing supercooled water as described in (1) and (2) below, as a means for solving the above problems. (1) A fresh water or salt water stored in the tank is introduced to the outside of the tank for continuous flow, and then a water passage for returning to the inside of the tank is provided to remove relatively large ice. A first filter, a heating means for maintaining the water temperature at a temperature above the freezing point, a second filter for capturing the ice and causing it to exchange heat with the surrounding water to melt the ice, and a cooling water. An apparatus for producing supercooled water, characterized in that cooling means for rejecting the cooling water is interposed in the above order from upstream to downstream. (2) In the supercooled water producing apparatus as described in 1 above, a pump having a heating effect for keeping the water temperature at the freezing point or higher is provided instead of the heating means for keeping the water temperature at the freezing point or higher. An apparatus for producing supercooled water, characterized in that

[0007]

[Action]

 Since the present invention is constructed as described above, it has the following effects. (1) In the configuration of (1) above, the water continuously discharged from the tank to the water passage passes through the first filter, the heating means, the second filter, and the cooling means in this order, and is again returned. Reflux into the tank. At that time, the relatively large ice is trapped by the first filter and does not return to the bath. The ice fine enough to pass through the first filter is captured directly by being heated by heating means for keeping the water temperature at a temperature above the freezing point or by a second filter interposed downstream of the heating means. Melts when exposed to water temperatures above the freezing point. In this way, the water from which ice nuclei have been depleted is cooled by the next cooling means and returned to the tank, so that ice nuclei do not become seeds and freeze the water channels. Therefore, supercooled water can be continuously and stably produced. (2) In the configuration of (2) above, in place of the heating means for maintaining the water temperature above the freezing point in the supercooled water producing apparatus of the above configuration (1), the water temperature is above the freezing point. Since it is provided with a pump having a heating effect for maintaining the temperature of 1), the same operation as (1) above can be achieved without interposing a heating means.

[0008]

【Example】

 An embodiment of the present invention will be described with reference to FIG.

FIG. 1 is a schematic configuration diagram of an apparatus for producing supercooled water according to this embodiment. In the figure, a water passage 2 is provided outside the tank 1 in which the supercooled water is stored, connecting the upper side and the lower side of the tank 1, and the upper side of the inside of the tank 1 via a circulation pump 21. The water thus derived continuously flows through the water passage 2 and is again introduced into the tank 1 from the lower part. A first filter 22, a heater 23 for heating water to a predetermined temperature, a second filter 24, and a cooler 25 are provided in this order in the water passage 2 in this order. The first filter 22 collects a relatively large amount of ice flowing from the tank 1. In the present embodiment, the first filter 22 collects ice having a size of several hundred μm or more, and the second filter 24 has a thickness of 10 μm. It is designed to collect ice larger than m. A double-tube heat exchanger or the like is used as the cooler 25, and water flows through the inside of the tube and brine at a predetermined temperature (for example, -5 ° C to -10 ° C) is supplied to the outside of the tube.

The water continuously drawn from the tank 1 to the water passage 2 by driving the circulation pump 21 is the first filter 22, the heater 23, and the second filter 24 as shown by the solid arrows in the figure. After that, it enters the cooler 25, where it is heat-exchanged with brine as a cooling medium to be cooled to below freezing point temperature (for example, -3 ° C to -5 ° C) to become supercooled cooling water, and then to the tank 1 Introduced from below. Thus, with the lapse of time, the water temperature in the tank 1 gradually decreases, and finally the tank 1 is filled with the supercooled water having a predetermined degree of supercooling.

By the way, as the degree of supercooling of the supercooled water in the tank 1 increases in the process of manufacturing the supercooled water, the supercooled water discharged from the tank 1 to the water passage 2 is in an unstable state. The impact of vibration or the like in the water passage 2 may generate minute ice, that is, ice nuclei, or the ice crystals formed in the tank 1 may flow into the water passage 2. However, in the present embodiment, the first filter 22 collects and removes the ice having a large particle size, and in the process of flowing through the heater 23, it is heated to a predetermined temperature (for example, 0 ° C. to 2 ° C.) and further 2 The filter 24 collects the remaining ice nuclei having a small particle size, exchanges heat with the surrounding ice, and melts. Therefore, even if ice nuclei flow into the water passage 2, they are removed and melted by the first filter 22, the second filter 24, and the heater 23, so that the ice nuclei do not become seeds and the water passage 2 is frozen. Thus, supercooled water can be stably produced.

Further, when the temperature of the water passing through the second filter 24 can be kept above the freezing point due to the heating effect of the electric input of the circulation pump 21, the heater 23 is not necessary.

As described above, according to this embodiment, the water continuously discharged from the tank 1 to the water passage 2 by the circulation pump 21 and then returned to the lower part of the tank 1 first passes through the first filter 22. At this time, even if a large piece of ice is trapped, and if a small piece of ice passes through it, it is heated to a temperature above the freezing point by the heater 23 in the downstream thereof, and the mesh of the mesh downstream of the ice is cooled. The water is cooled by the cooler 25 and returned to the tank 1 by being captured by the small second filter 24 and melted by being exposed to heated water, and in the state where ice nuclei disappear, the water passage 2 This has the advantage of eliminating the problem that the inside of the ice freezes using ice nuclei as seeds, which impedes the continuous production of supercooled water.

When the circulation pump 21 is driven by a required electric input, the heat input by the circulation pump 21 keeps the temperature of the water passing through the second filter 24 above the freezing point, so that the heating heater 23 is used. There is an advantage that the above-mentioned effect can be obtained.

[0015]

[Effect of the device]

 Since the present invention is constructed as described above, it has the following effects.

That is, in the apparatus for producing supercooled water of the present invention, even if ice nuclei are mixed in the water drawn out from the tank to the water passage, the ice nuclei are generated by the first and second filters and heating means. Since the water is removed and melted (or by the heating effect of the pump), the water passage is not frozen, and the supercooled water can be stably produced.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of an apparatus for producing supercooled water according to an embodiment of the present invention.

[Explanation of symbols]

 1 Tank 2 Water Channel 11 Stirrer 21 Circulation Pump 22, 24 Filter 23 Heating Heater 25 Cooler

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Kyosuke Sasaki 3-1, Asahi-cho, Nishibiwajima-cho, Nishikasugai-gun, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Air-Conditioning Works (72) Creator Taio Seno 7 Horie-cho, Matsuyama-shi, Ehime Prefecture Miura Laboratory Co., Ltd. (72) Inventor, Akiyoshi Itabashi 7 Horie-cho, Matsuyama City, Ehime Prefecture Miura Laboratory Co., Ltd.

Claims (2)

[Scope of utility model registration request] 1. A water passage is provided in which fresh water or salt water stored in the tank is led out of the tank to continuously flow therethrough, and then returned to the inside of the tank, and relatively large ice is removed from the water passage. A first filter for maintaining the temperature of the water above the freezing point, a second filter for capturing the ice and exchanging heat with the surrounding water to melt the ice, An apparatus for producing supercooled water, characterized in that a cooling means for cooling water is interposed in the above order from upstream to downstream. 2. The supercooled water producing apparatus according to claim 1, wherein a pump having a heating effect of keeping the water temperature at a temperature equal to or higher than the freezing point is used instead of the heating means for keeping the water temperature at a temperature equal to or higher than the freezing point. An apparatus for producing supercooled water, comprising: