JPS596209Y2 - One-way heat transfer device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a one-way heat transfer device that can be effectively used in solar heat collectors, heat exchangers, and the like.

A conventional heat transfer device has a structure in which a wall is disposed between a heating body side and a heated body side, and heat from the heating side is transferred to the heated side through the wall body.

Therefore, for example, when solar heat is used on the heating element side and water is used on the heated element side, normally the water can absorb heat from the sun through the wall, but in the case of rain etc. There was a problem in that the heat absorbed by the wall was dissipated through the wall.

Further, the conventional heat transfer device has a problem in that the wall body is extremely weak against external pressure.

The purpose of the present invention is to obtain a one-way heat transfer device that can maintain the temperature of the object to be heated while flowing and whose wall body is strong against external pressure. a heat insulating body shaped like a box to allow the flow of the heating element; a first wall disposed to close the opening of the heat insulating body; and an outer side of the first wall to be located on the side of the heating element. The second
The walls are constructed so that under normal conditions, a gap is formed in the entire area between the two walls, and the walls are curved convexly toward the heated side. This paper proposes a unidirectional heat transfer device with a structure filled with open foam and both walls made of a material with a large thermal expansion coefficient and heat transfer coefficient. explain.

Reference numeral 1 denotes a box-shaped heat insulating body with one side open (the top in the figure), which is composed of a heat insulating material 2 made of polystyrene foam mortar resin, cement foam, etc., and an outer shell 3 made of a polypropylene film bag, coating, etc. be intimidated.

4 is a first portion disposed to close the open portion of the heat insulating main body 1;
A wall 5 is a second wall disposed outside the first wall 4.

The first wall 4 and the heat insulating body 1 define a flow space 6 for the heated body, and therefore the heat insulating body 1 is provided with a body supply pipe 7 and a discharge pipe 8 for the body to be heated.

The first wall 4 is fixed by fitting the fitting part 9 integrated with its outer edge into the heat insulating body 1, and the second wall 5 is fixed at its outer edge to the heat insulating body 1.

Further, both walls 4 and 5 are arranged so that a gap 10 is formed in the entire area between the walls 4 and 5 under normal conditions, and the walls are curved convexly toward the heated object side, that is, toward the heated object flow space 6 side. .

Both walls 4 and 5 are made of a material with a large coefficient of thermal expansion and heat transfer, for example, the first wall 4 is made of polypropylene, polyethylene, polyvinyl chloride, nylon, etc., and the second wall 5 is made of polypropylene. , nylon, polyvinyl chloride, metal, etc.

Polystyrene foam 11 is filled between the heat insulating main body 1 and the first wall 4, that is, in the tough heating material flow space 6.

Next, the effect when the one-way heat transfer device having the above configuration is used as a solar thermal budding device will be explained.

Figure 1 shows the normal state.

At this time, a uniform gap 10, that is, an air layer, is formed between the first wall 4 and the second wall 5.

In this state, solar heat A1 heats the second wall 5, and then heats the first wall 4 due to convection heat transfer in the air layer.

Further, the water B1 from the heated object supply pipe flows through the polystyrene continuous foam 11 filled in the heated object flow space 6,
During this time, the heat of the first wall body 4 is absorbed and is discharged from the heated body discharge pipe 8 as hot water b1.

In this way, normal heat transfer C1 takes place under normal conditions.

Figure 2 shows a state in which it is receiving high solar heat A2.

According to this, the second wall 5 thermally expands, reduces the gap 10, and brings a large portion into contact with the first wall 4.

Therefore, the heat transfer C2 is carried out directly at a high temperature, so that high-temperature water b2 can be obtained.

FIG. 3 shows a state in which water B2 at a low temperature is being supplied.

The resulting first wall 4 is heat-shrinked, the gap 10 is reduced, and a large portion of the first wall 4 is brought into contact with the second wall 5.

Therefore, the heat transfer C2 is performed directly at a high temperature, thereby obtaining high-temperature water b2.

To summarize the above, Figure 1 shows solar heat at room temperature and supply water at room temperature (normal temperature - normal water), and Figure 2 shows high solar heat and supply water at room temperature (high temperature - normal water). In addition, Figure 3 shows a case where the solar heat is at room temperature and the supplied water is at a low temperature (normal temperature - low water).

In either case, there is a difference in heat transfer, but the heat transfer is unidirectional.

Looking at another form, (at room temperature and high water temperature) the state shown in Figure 1,
(High temperature, high water), the state shown in Figure 2, (High temperature, low water), the state that combines Figures 2 and 3, (Low temperature, normal water), (
In the cases of (low temperature and high water) and (low temperature and low water), the deformed state shown in FIG. 1 is obtained in which the gap 10 is increased, and in both cases, heat transfer occurs in one direction.

Note that the open polystyrene foam 11 also elastically deforms in accordance with the thermal deformation of the first wall 4.

As mentioned above, the water B supplied from the heated object supply pipe 7
l and B2 are discharged from the heated object discharge pipe 8 as hot water b1 and b2, but because they flow through the polystyrene open foam 11 in the heated object flow space 6, due to their nature, hot water No backflow of b1 and b2 occurs, so the temperature increase line from the population to the outlet can be maintained undisturbed.

Furthermore, when external pressure acts on the second wall 5, the second wall 5 only deforms to reduce the gap 10, and this external pressure is applied to the open polystyrene foam 11 side through the first wall 4. It is accepted.

As described above, according to the present invention, efficient one-way heat transfer is achieved no matter how the temperatures on the heating body side and the heated body side change.

Particularly when the heating element becomes high in temperature or the heated object becomes low in temperature, the two walls automatically come into contact with each other to improve the heat transfer coefficient.

In the opposite case, although the heat transfer coefficient decreases, unidirectional heat transfer can be maintained, and a heat retention effect can be expected due to the air layer in the gap.

Such a one-way heat transfer device can be effectively used in many ways, such as a solar heat collector, a gas-gas or gas-water heat exchanger, and a house wall panel.

In particular, according to the present invention, since the open polystyrene foam is filled between the insulation main body and the first wall, when external pressure acts on the second wall, the second wall deforms to reduce the gap. By simply doing so, this external pressure can be received by the open polystyrene foam through the first wall, thereby providing a product with high strength.

Furthermore, due to the nature of Ponostyrol open foam, hot water (
There is no backflow of temperature), so the temperature rise line from the inlet to the outlet can be maintained without disturbance, and high hot water can always be obtained.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIGS. 1 to 3 are sectional views showing the operating state, respectively, and FIG. 4 is a longitudinal sectional view of the main parts. 1...Insulation body, 2...Insulation material, 3.
...Outer skin body, 4...First wall body, . 5...
. . . second wall body, 6 . . . heated object flow space,
7... Heated object supply pipe, 8... Heated object discharge pipe, 9... Fitting part, 10... Gap, 11... ...Polystyrene open foam.

Claims (1)

[Scope of utility model registration request] A heat insulating body shaped like a box to allow the flow of the heated object,
A first wall is disposed to close the opening of the heat insulating body, and a second wall is disposed on the outside of the first wall to be located on the side of the heating element. The structure is such that a gap is created in the entire area between both walls and the wall is curved convexly toward the heated side, and polystyrene continuous foam is filled between the heat insulating main body and the first wall, and both walls are heated. A unidirectional heat transfer device characterized by being made of a material with a large expansion coefficient and heat transfer coefficient.