JPS6245475B2 - - Google Patents

Description

Detailed Description of the Invention This invention applies the principle of heat transport using heat pipes with extremely high thermal conductance, and uses the heat source of water stored in the summer to melt snow and ice on roads, for example, and to use this cold water. For example, it relates to a heat exchange device used for air conditioning in the summer.

Conventionally, in the case of road snow melting, for example, as shown in FIG. 1, this type of device has a heating part 2 of a heat pipe buried 1 deep underground, a heat radiating part 3 of the heat pipe buried in a concrete slab 4 of the road, Geothermal heat was used as a heat source to guide heat to the road surface 5 to melt snow on the road.

The heat pipes 2 and 3 are pipe-shaped containers filled with a working fluid that transports heat, such as water, alcohol, fluorocarbons, or ammonia, and they conduct heat extremely well, even if they are several meters long. It has the characteristic that almost the entire length is isothermal. On the other hand, the soil temperature between 7.8 m and 20 m underground is approximately the same as the annual average temperature unless there is another heat source.

Therefore, by inserting the heat pipe heating section 2 deep into the ground 1 and burying the heat radiating section 3 in the concrete slab 4 of the road, the heat in the soil is transported to the ground surface 5, making it possible to melt snow and remove ice. Depending on the length of the heating section 2, the length of the heat dissipation section 3, the embedded pitch, etc., the surface heat flux, which indicates snow melting or ice removal ability, is 50 to 200 W/
m ² is obtained.

Conventional geothermal snow melting and anti-freezing equipment is configured as described above, but has the drawbacks of low temperature differences and the inability to significantly increase surface heat flux as long as the heat accumulated in the soil is taken out. Ta. If the length of the heating section is 20 to 30 m, the length of the heat dissipation section is shortened, or the pitch is made small, the capacity will increase, but
Boring construction costs and number of heat pipes increase,
The investment amount for the equipment increased significantly, and there were various economic disadvantages.

This invention was made in order to solve the above-mentioned drawbacks of the conventional ones.At least one set of heat storage tanks are connected through a pipe line, and the pipe line and a heated part or a cooled part are connected with a heat transfer tube. By circulating the water in the heat storage tank from one side to the other through a pipe, in the summer, heat is collected while cooling the parts to be cooled, and hot water is stored in one of the heat storage tanks, and in the winter, the heat is collected. By flowing this hot water to the other heat storage tank through a pipe, the cooled heat is collected while heating the heated part, and the cold water is stored in the other heat storage tank. The object of the present invention is to provide an economically inexpensive heat exchange device whose heat capacity and performance are significantly improved by repeating the above operations as appropriate.

An embodiment of the present invention will be described below with reference to FIG. 2 for the winter season. Heat pipe heat dissipating parts 3 are buried in the paved road surface 5 at appropriate intervals, and heat pipe heating parts 2 are buried in the pipe line 7 installed on the side of the road.
Place. The hot water collected in the summer and stored in the thermal storage tank 8 is pumped up by the pump 9, injected into the pipe 7 through the three-way valve 11, gives heat to the heat pipe heating section 2, and passes through the heat pipe heat dissipation section 3 to the pavement. By heating the road surface 5 to 0° C. or higher, snow melting or flowing water is prevented from freezing. The water flowing through the pipe 7 is cooled and passed through the three-way valve 15 to the injection pipe 14.
and is injected into the cold storage heat tank 12. A perspective view of the buried heat pipe is shown in FIG. The snow melting and anti-icing system operates by starting the pump when it snows or freezes, and turning the pump off when snow stops falling and snow melting is no longer needed, or when temperatures rise and anti-icing is no longer needed. At the same time, the three-way valves 11 and 15 are switched to inject water into the pipes 10 and 14, respectively.
The automatic control device 16 is installed so that water is injected into each heat storage tank through the pipe 7, the water in the pipe 7 is eliminated, the three-way valve is switched back to its original state, and freezing in the pipe 7 is prevented. When the temperature drops below zero degrees or when snow begins to accumulate, signals are received by the temperature sensor 17 and the snow accumulation monitoring device 18, respectively, and the pump 9 is started. The heat storage tank may be, for example, a pond, a large underground concrete tank, or a deep well.

Next, another embodiment of the present invention will be described with reference to FIG. 4 for the summer season. In contrast to winter, snow melting and antifreeze systems are replaced by solar heat collectors. That is, in the summer, heat enters the paved road surface due to solar heat or convection from the air, and the road surface is heated. When the road surface temperature becomes higher than the temperature of the cold water passing through the pipe 7, the heat that has entered the road surface is collected by the heat pipe. On the other hand, the cold water pumped from the cold storage heat tank 12 flows into the pipe line 7 through the pipe 14 and the three-way valve 15, collects heat from the heat pipe cooling section 2, and is heated. The heated water further absorbs heat from the air heat source through the three-way valve 20 and the air-to-water heat exchanger 19, is further heated, and is injected into the thermal storage tank 8 through the three-way valve 11 and piping 10. The operation of this heat storage process is also started by the temperature sensor 17. That is, when the air temperature is 2 to 3 degrees Celsius higher than the water temperature in the cold storage heat tank 12, the automatic control device 16 always operates, and each three-way valve 1
5, 20, 21, and 11 are operated to form a flow path as shown by the arrow in the figure, the pump 13 is started.

When the temperature drops and the difference between the water temperature and the water temperature in the cold storage heat tank 12 becomes 2 to 3 degrees Celsius or less, the pump 13 automatically stops. In this way, solar heat is efficiently stored during the warm period from spring to autumn.

In this way, solar heat can be stored during the warm season and used for heating, snow melting, and freezing prevention in the winter, and the stored heat can be used for summer cooling, which has the advantage of requiring almost no cost for thermal energy. The cost is only slightly for the pump power and electric power for the heat exchanger fan power automatic control device.
Additionally, large-scale construction work such as boring work is not required. Note that a solar heat collector may be used instead of the air-to-water heat exchanger 19, or a combination of these may be used to collect heat.

In addition, in the above embodiments, applications of snow melting on roads and anti-freezing devices have been explained, but snow melting on roofs, building rooftops, parking lots, elevated bridges, bridge decks, railings,
It can also be applied to underground areas.

Furthermore, as an application of air conditioning equipment, the heat transfer tubes can be installed on the floors, ceilings, walls, etc. of homes and buildings to provide heating in the winter and cooling in the summer.

Furthermore, it can be installed on the floor or wall of a livestock shed to provide heating and cooling. In addition, FIG. 5 is a cross-sectional view showing a schematic configuration of an air-conditioning system when a heat transfer pipe 25 is installed in the wall of a building.Due to unidirectional heat transfer of the heat pipe 25, the lower pipe 2 is closed during winter.
Hot water is supplied to the tube 7, and cold water is supplied to the pipe 26 at the top in the summer for heating and cooling. Also, the 6th
The figure shows an example in which the ground layer and the room inside the agricultural greenhouse 23 are heated.

As described above, according to the present invention, at least one
A set of heat storage tanks are connected through a pipe line, and this pipe line and a heated part or a cooled part are connected by a heat pipe, and the water in the heat storage tank is transferred from one side to the other through the above pipe line. By connecting a heat exchanger for collecting heat in series or parallel with the above-mentioned pipes, in the summer, heat is collected while cooling the parts to be cooled, and hot water is stored in one of the heat storage tanks, and in the winter, This hot water can be passed through a pipe to the other heat storage tank, and while heating the heated parts, the cold water can be collected and stored in the other heat storage tank, which greatly improves the heat capacity and capacity. It becomes possible to provide an economically inexpensive heat exchange device.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a conventional heat exchange device. FIG. 2 is a block diagram showing the configuration of a heat exchange device in an embodiment of the present invention. FIG. 3 is a main part of the heat exchange device shown in FIG. FIG. 4 is a block diagram showing the structure of a heat exchanger according to another embodiment of the present invention. Figures 5 and 6 show application examples; a schematic cross-sectional view and a perspective view of a case where a heat pipe is buried in the wall of a building and a case where a heat pipe is buried in the ground layer of an agricultural greenhouse, respectively. It is. In the figure, 2 and 3 are a heating part and a heat radiation part that constitute a heat pipe, 7 is a pipe line, 8 is a thermal storage tank,
12 is a cold storage heat tank, and 19 is an air-to-water heat exchanger. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Scope of Claims] 1. At least one set of heat storage tanks communicating through pipes, one end of which is disposed in each of the pipes, and the other end of which is disposed in a heated part or a cooled part, respectively. In the summer, the stored cold water is passed through a pipe line from one of the heat storage tanks to cool the cooled part through the heat pipe, and the hot water is stored in the other heat storage tank. Also, in the winter, the hot water is passed through a pipe from the other side of the heat storage tank to heat the heated section through the heat pipe, and the cold water is stored in one of the heat storage tanks. heat exchange equipment. 2. The heat exchange device according to claim 1, wherein the heated portion is a road surface that requires snow melting and freezing prevention. 3. The heat exchange device according to claim 1, wherein the heated portion is a subterranean portion of a bridge that requires prevention of icicle generation. 4. The heat exchange device according to claim 1, wherein the heated portion is a floor, ceiling, or wall of a building or a house.