JPS6135810A - Method for preventing mixing of liquids - Google Patents

Abstract

PURPOSE:To enhance the economical effect in the utilization of warm water by simply and certainly preventing the mixing of liquids having different temps., by using a float enabled in the adjustment of its specific gravity in a tank. CONSTITUTION:A float 2 is floated between the lower cold water layer 3 and the upper warm water layer 4 within a cylindrical heat accumulation tank 1 and provided so as to provide a slight gap 7 from the inner surface of the heat accumulation tank 2 so as to be capable of being floated and sunk in the heat accumulation tank 2. The specific gravity of the float 2 is adjusted by increasing and decreasing the amount of a specific gravity adjusting body 5 and the volume of an air layer 6 so as to be made smaller than that of the lower cold water layer 3 or larger than that of the upper warm water layer 4 and the boundary surface between both of them is moved and floated up and down corresponding to the specific gravities of the cold water layer 3 and the warm water layer 4 to prevent the mixing of both layers 3, 4.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preventing mixing of liquids having different temperatures in a heat storage tank or the like.

[Prior art and its problems]

Conventionally, heat storage tanks have been used more often from the viewpoint of efficient operation of heat source equipment, effective use of heat, or economical reasons. Cheap as a heat storage material used in heat storage tanks.

Water is considered optimal due to its safety and large heat capacity, but this water-type heat storage tank has the disadvantage that the upper and lower layers of water with different temperatures mix, reducing the utility value of heat. This mixing of water with different temperatures in the tank is one of the causes of low efficiency and uneconomical operation of the heat storage system.

As a method to improve this problem, a temperature stratification type heat storage tank has been considered, which uses the difference in specific weight of water at different temperatures to prevent mixing using a vertically-shaped water tank, but it has the disadvantage of being expensive to construct.

[Purpose of the invention]

The present invention was made to improve the conventional drawbacks,
To provide a method for easily and reliably preventing mixing of liquids having different temperatures by using a float in a tank, and increasing the economic effect of hot water use.

[Structure of the invention]

In the present invention, a float is filled with specific gravity adjusting liquid and air, and the float is inserted with a small gap between it and the inner surface of the heat storage tank, and moves up and down in response to changes in the specific gravity of the liquid in the heat storage tank. This is a method for preventing mixing of liquids, which is characterized in that the liquid above the float and the liquid below the float are prevented from mixing by moving and floating the float.

〔Example〕

Embodiments of the present invention will be explained with reference to the drawings. Fig. 1 is a perspective view of a heat storage tank for explaining the mixing prevention method, and Fig. 2 is a side cross-sectional view of a float. Float float 2. Float 2i1
．． As shown in Fig. 2, it is a sealed flat cylindrical body, made of a water-impermeable material such as plastic, and contains water as a specific gravity adjusting liquid 5, and adjusts the amount of the specific gravity adjusting liquid 5 and the volume of the air layer 6. By doing so, the float 2 can be adjusted to a predetermined specific weight. A slight gap 7 is provided between the float 2 and the inner surface of the heat storage layer 2 so that the float 2 can float and sink within the heat storage layer 2.

The specific weight of the float 2 is adjusted so that it is smaller than the specific weight of the lower cold water layer 3 and larger than the specific weight of the upper hot water layer 4, and both It floats up and down on the boundary surface of the water, preventing the cold water layer 3 and the hot water layer 4 from mixing.

The float 2 of the above embodiment may be the float shown in FIGS. 3 to 6. The float 28 shown in FIG. 3 has a rectangular air reservoir 8 at the upper center to improve horizontal stability within the heat storage tank 2. It is a conical float 2b whose cross-sectional shape is an isosceles triangle as shown in FIG.
The float 2c in FIG. 5, which is a float shaped to have even better stability than the float 2b, has a structure in which a cylindrical portion 9 is provided at the end of the float 2b to suppress heat conduction at the end. It is. FIG. 6 shows a float 2d in the form of a small flat ellipsoid, and a large number of these floats 2d can be connected in a plane to create a float of a predetermined shape and size, and are incomplete.

It can be used for heat storage tanks with irregular planar shapes.

[For production]

The specific weight of the float is adjusted so that the specific weight of the liquid is at the optimal temperature layer that differentiates between the cold liquid layer with a large specific weight of the target heating medium liquid and the hot liquid layer with a small specific weight. According to the specific gravity of the cold liquid layer and the hot liquid layer, the liquid moves up and down on the interface between the two and floats, and the pulsation of water in the tank due to the inflow and discharge of the liquid causes the engraving of the living statement (in the contents). No change) hN' It acts to prevent the cold liquid layer and hot liquid layer from mixing.

In this case, for example, by adjusting the volume of the specific gravity adjusting liquid 5 and the air layer 6, a float having a predetermined specific weight can be produced.

The first table shows an example of the optimum specific weight of the float based on the temperature of the hot water layer and the temperature of the cold water layer when the heat medium liquid is water.

Table 1, Figures 7 to 9 are drawings for explaining the effect when this mixing prevention method is applied to a heat storage tank for hot water supply using solar heat.

In FIG. 7, a water supply pipe 12 is connected to the lower end of a heat storage tank 10 for hot water supply.
A hot water supply pipe 13 is provided at the upper end, and connecting pipes 15, 16 and 1 are connected between the inlet side of the solar heat collector 140 and the center and lower end of the heat storage tank 10, and between the outlet side and the upper end, respectively.
7, and a float 11 whose specific gravity has been adjusted to a predetermined specific weight is inserted into the heat storage tank 10. In FIG. 7, hot water 20 collected by the heat collector 14 is stored in the upper half of the heat storage tank 10, the lower half is filled with cold water 21, and the float 11 is stored in the heat storage tank 10.
It is located at a height near the center of the Then heat collector 1
As the heat storage progresses further in step 4, the water supplied from the connecting pipe 16 is heated and accumulates in the upper part of the heat storage tank 10, and the float 11 descends in the tank as shown in FIG. Next, as shown in FIG. 9, when hot water is supplied to the outside through the hot water supply pipe 13, cold water is supplied from the water supply pipe 12 to the water reducing valve, so the amount of cold water with a large specific weight increases in the lower part of the heat storage tank 10. Therefore, the float 11 rises in the tank.

In this case, hot water 20 in the upper part of the heat storage tank 10 and cold water 2 in the lower part
1. The tank is always shielded by a floating float 11 that moves up and down according to the specific gravity, and even if water pulsates in the tank during hot water supply or water supply, hot and cold water mixes and the temperature is neutralized. The hot water 920 at the top is not cooled down, allowing efficient use of hot water.

〔Effect of the invention〕

Since the present invention uses a float whose specific gravity can be adjusted, it can be widely applied depending on the type and temperature of the heat medium liquid.It is also a method that can easily and reliably prevent mixing of liquids, and efficiently distributes hot and cold water. By applying this method to the operation of air conditioners and pumps, high efficiency operation is possible, which can be expected to improve economic efficiency and extend the life of operating equipment. This has the effect of making residents' lives more comfortable.

[Brief explanation of drawings]

Figure 1 is a perspective view of the heat storage tank explaining the mixing prevention method, Figure 2
The figure is a side sectional view of the float, Figures 1g3 to 6 are side sectional views of various aspects of the float, and Figures 7 to 9 are enlarged drawings for explaining the function of the float. 1.10... Heat storage tank 2,2Bt2b, 2cs2d
,,11... Float 3... Cold water layer 4... Hot water layer 5... Specific gravity adjustment liquid 6... Air layer 7
...Applicant for gap Person Co., Ltd. Ma Group 1st wA 'p'p': + Figure 7 Figure 8 Figure 9 Procedure Amendment 11.!: (Interpretation) December 26, 1980

Claims (1)

[Claims] A float is filled with specific gravity adjustment liquid and air, and this float is placed with a small gap between it and the inner surface of the heat storage tank, and is floated by moving up and down in response to changes in the specific gravity of the liquid in the heat storage tank. A method for preventing mixing of liquids, characterized by preventing mixing of a liquid in an upper part of a float and a liquid in a lower part of a float.