JPS6364706B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a solar water heater using heat pipes.

Conventional solar water heaters install a heat collector on the roof of a house and circulate water through it.
This method uses direct solar heat to heat the roof, which puts a heavy burden on the roof, and there are concerns about water contamination and freezing at night in winter, as well as requiring labor to adjust the temperature.

The present invention solves the above-mentioned drawbacks by indirectly transmitting solar heat to water stored in a hot water tank such as an indoor bathtub through a heat pipe and by moving the heat pipe up and down.

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

In Fig. 1, numeral 1 denotes a heat pipe installed through the roof 16 of the house, which is movable in the vertical direction. In order to improve the amount of heat collection, the surface is treated or fins are provided. Further, its lower end constitutes a heat radiation section 1b located inside the house. Roof 16 superior,
A concentrator 2 is provided to efficiently condense sunlight onto the heat receiving portion 1a of the heat pipe 1 outside the house. The sunlight focused by the concentrator 2 is absorbed by the heat receiving part 1a of the heat pipe 1, and the working fluid in the heat pipe 1 is vaporized and immersed in a water storage such as a bathtub 3 placed inside the house. The heat dissipating portion 1b contacts the inner wall surface of the heat pipe 1 at a low temperature, releases latent heat of vaporization, and condenses. The condensed hydraulic fluid is
Due to the capillary phenomenon, the water returns to the heat receiving section 1a side, and the warming action of the stored water is repeated.

Next, the elevating mechanism of the heat pipe 1 will be explained. An outdoor temperature sensor 4 is installed on the roof 16, etc., and an indoor temperature sensor 5 is installed in a hot water tank such as a bathtub 3, and the respective temperatures are introduced as electric signals to a comparator 6. The temperature of the heat receiving part 1a is compared with the temperature measured by the indoor temperature sensor 5 by the comparator 6, and the following control operation signal is outputted from the comparator 6 based on the comparison result.

That is, if the water temperature in the bathtub 3 can be increased based on the outside air temperature detected by the outdoor temperature sensor 4 (that is, the temperature of the heat receiving part 1a), the lifting device 7
is activated to lower the heat pipe 1, and the heat dissipation part 1b is deeply immersed in the water stored in the bathtub 3.

Conversely, if the water storage temperature cannot be raised higher than the outside air temperature detected by the outdoor temperature sensor 4, the heat pipe 1 is raised by the lifting device 7.
The heat radiating part 1b is separated from the water stored in the melt tank 3 to prevent heat loss due to backflow of heat. Furthermore, if the maximum limit temperature of the indoor temperature sensor 5 is set in the comparator 6, when the temperature detected by the indoor temperature sensor 5 reaches that temperature, the lifting device 7 is operated to move the heat pipe 1 to the upper limit position. It can also be stopped.

By the way, the lifting device 7 that drives the heat pipe 1 up and down in the vertical direction includes, for example, a rack 8 provided on the outer periphery of the heat pipe 1 and a pinion 10 connected to the drive shaft of a motor 9 that starts or stops in response to an electric signal. Depending on the combination of 11 is heat pipe 1
12 is a lower limit cam that operates the limit switch 11 at the lower limit position, and 13 is an upper limit cam that operates the limit switch 11 at the upper limit position. As shown in FIGS. 2 and 3, the lower limit cam 12
In this case, the entire surface of the heat receiving part 1a of the heat pipe 1 receives the focused sunlight from the concentrator 2, and the heat dissipating part 1
The lifting device 7 is controlled so as to stop at the lower limit position so that the entire surface of the container b is in the water. The upper limit cam 13 controls the lifting device 7 to stop the heat pipe 1 at the upper limit position so that the entire surface of the heat receiving portion 1a of the heat pipe 1 is removed from the irradiation of the focused sunlight from the concentrator 2. Note that 14 is a sealing member, and 15 is a protector.

Since the solar water heater using the heat pipe according to the present invention is configured as described above,
The temperature detected by the outdoor temperature sensor 4 and the temperature detected by the indoor temperature sensor 5 are compared by the comparator 6. Based on the instruction, the heat pipe 1 is lowered or raised to heat the stored water in relation to the outside temperature. The reverse flow of heat is prevented, and the limits of the rise and fall of the heat pipe 1 are controlled by a limit switch 11.

As can be understood from the above explanation, according to the solar water heater using heat pipes according to the present invention, the light collector is installed on the rooftop, the weight is light, and the stored water is heated indirectly. There is no contamination of stored water, and since outdoor water pipes are not used, there is no fear of freezing.
The heat pipe is automatically lowered only when the stored water can be heated based on the relationship between the temperature of the heat receiving part of the heat pipe and the stored water temperature, and when the stored water cannot be heated, the heat pipe is raised. The stored water is automatically and effectively heated by stopping the heating.

[Brief explanation of drawings]

FIG. 1 is a schematic layout diagram of a solar water heater using a heat pipe according to the present invention, and FIG.
FIG. 3 is a schematic diagram showing the lower limit position of the heat pipe, and FIG. 3 is a schematic diagram showing the upper limit position of the heat pipe. 1...Heat pipe, 1a...Heat receiving part, 1b...
...heat dissipation section, 2...concentrator, 3...bathtub (hot water storage tank),
4... Outdoor temperature sensor, 5... Indoor temperature sensor, 6... Comparator, 7... Lifting device, 11... Limit switch, 12... Lower limit cam, 13... Upper limit cam.

Claims (1)

[Claims] 1. A heat pipe whose heat receiving part is located outside the house and whose heat radiating part is located inside the house and is movable in the vertical direction. a concentrator that converges light; a hot water storage tank that is placed inside the house and in which the heat dissipating part of the heat pipe in a descending state is immersed in water; an outdoor temperature sensor that detects the temperature of the heat receiving part of the heat pipe; An indoor temperature sensor installed in the hot water storage tank to detect the stored water temperature; a comparator to compare the temperatures detected by both temperature sensors; When the temperature is higher than the temperature detected by the sensor, the heat pipe is lowered and the heat radiating part is immersed in water, and when the temperature is lower than the temperature detected by the indoor temperature sensor, the heat pipe is raised and the heat radiating part is immersed in water. 1. A heat pipe type solar water heater characterized by having a lifting device that allows the device to be removed further.