JPS5835355A - solar heat collector - Google Patents

Abstract

PURPOSE:To contrive to facilitate construction work and to reduce radiation loss from piping, by a method wherein a heat collector and a heat-accumulating tank are connected to each other by a single pipe, and supply of water and draining are conducted alternately. CONSTITUTION:The heat collector 31 provided with an air vent valve 33 and the heat-accumulating tank 34 are connected to each other by a single heat-collecting pipe 33, which is provided with a heat-collecting pump 34 for supplying water into the heat collector 31 and with a solenoid valve 35 on the discharge side of the pump 34. The pipe on the suction side of the pump 34 is branched into a pipe 36 connected to an upper part of the tank 32 and a pipe 37 connected a lower part of the tank 32, a check valve 38 of the direction for flowing into the tank 32 is provided in the pipe 36, and a check valve 39 of the direction for flowing out from the tank 32 is provided in the pipe 37. When the difference between the detection value of a high temperature side sensor 42 and that of a low temperature thermo-element 43 of a temperature difference thermo-element 41 reaches a predetermined value, the solenoid valve 35 is opened, water is supplied into the heat collector 31 by the pump 34 through the pipe 37, the valve 39 and the pipe 33, and when the collector 31 is filled up with water, the pump 34 is stopped and the valve 35 is closed. When water in the collector 31 is heated, the valve 35 is opened to drain the water into the upper part of the tank 32 through the pipes 33, 36 and the check valve 38. Thereafter, the supply of water and draining are conducted alternately.

Description

[Detailed Description of the Invention] The present invention relates to a solar heat collecting device, in which the heat collecting piping between the heat storage tank and the heat collector is configured with one pipe, reducing the number of heat collecting pipes and reducing construction work. Simplification 1 The purpose is to provide a solar heat collector that achieves cost reduction and energy conservation.

Conventional solar heat collectors have been constructed as shown in FIGS. 2 and 3. FIG. 2 shows a forced circulation type solar heat collector, in which water in a heat storage tank 3 is supplied to the heat collector 1 by a circulation pump 2 through a heat collection feed pipe 4. The heated water of 2" L7V heated in the heat collector 1 passes through the heat collection return pipe 5 and is returned to the heat storage tank 3. A water tank 6 is placed on top of the heat storage tank 3. Tap water is supplied and stopped when the ball tap is completed, and hot water in the heat storage tank 3 is supplied under pressure to the faucet 8 by a pressurizing pump 9 for hot water supply. 1011-j: Water tank A water supply pipe 6 supplies water to the heat storage tank 3, and 11 is an air vent and valve attached to the heat collector.

During operation, water is sucked from the heat storage tank 3 through the circulation pipe 2, and the heat collection and feeding pipe 4. The heat is circulated via the heat collector 1, passes through the heat collection return pipe 5, and returns to the heat storage tank 3 again.

The disadvantage of this conventional method is that it requires two pipes, a heat collection feed pipe 4 and a heat collection return pipe 5, from the heat storage tank 3 to the heat collector 1, which increases the cost of piping and makes the construction difficult. there were.

Furthermore, it is contrary to energy saving in that heat loss occurs in both the heat collector 9 pipe 4 and the heat collection return pipe 6, and that the circulation pump 2 is constantly rotating.

Figure 3 shows a conventional pump-type solar heat collector. This thing covers the poles inside the heat collector 12 and the heat exchanger 13. Heat collection piping 16
The heat collector 12 communicates with the heat storage tank 17, and a timer valve 18 is provided in the middle of the heat collection pipe 16.

Hot water is supplied from the heat storage tank 17 to the faucet 2o by a hot water pressurization pump 19.

The water pipe 15 is provided with a main water tap 21 and a drain plug 22.

If you are trying to collect heat in this item, please use the water stop valve 2.
One pipe is opened to supply water to the heat collector 12, and the timer valve 18 is moved in the direction to close the heat collection pipe 16.

When a predetermined period of time has elapsed, the timer valve 1B is opened, so that the hot water whose temperature has been raised in the heat collector 12 falls into the heat storage tank 17 via the heat collection pipes 16. Thereafter, the water supply and falling water are repeated every predetermined waiting period.

The disadvantage of this conventional system is that two pipes, a water pipe 16 and a heat collection pipe 16, are required to reach the heat collector 12, which increases the cost of the pipes and requires difficult construction. In addition, in the case of this method, water falls unilaterally from the heat collector 12 into the heat storage tank 17, so if the AiJ daily hot water supply is not used, no matter how sunny the day, water remains in the heat storage tank 17 the day before. Unable to further raise the temperature of the hot water, the only options available were to use the hot water left over from the previous day, or to throw away the hot water from the previous day and reheat it. For this reason, it was not possible to effectively collect solar heat or raise the temperature, which was contrary to energy conservation.

As described above, all conventional solar heat collectors require two pipes to connect to the heat collector, which makes piping work difficult and expensive, and is also contrary to energy conservation.

The present invention solves the above-mentioned conventional drawbacks by configuring the heat collection piping from the heat storage tank to the heat collector with a single pipe, and using a heat collection pump to connect the heat storage tank to the water/metal heat collection pipe. Problem C was solved by supplying hot water to the heat storage tank, and then returning the hot water from the collector to the heat storage tank through the entire heat collection pipe after the water temperature had risen. An embodiment of the present invention will be described below with reference to a first scale.

In the figure, 31 is a collector that collects all solar heat, and 32
is a heat storage tank that stores all of the hot water heated by the heat collector 31. A heat collection pipe 33 is connected between the heat collector 31 and the heat storage tank 32.

There is a heat collection pot 34 near the heat storage tank 32 of this heat collection pipe 33.
is provided, and plays the role of supplying water from the heat storage tank 32 to the heat collector 31.An electric two-force valve 36, which is an on-off valve, is provided on the discharge side of the heat collection pump 34. , a first heat collection pipe 36 which is branched into two on the suction side of the heat collection tank 34 and connected to the upper part of the heat storage tank 32;
Another second heat collection pipe 37 connected to the lower part of the heat storage tank 32
It consists of n. A first reverse valve 38 is provided in the first heat collecting pipe 36, and a second reverse valve 39 is provided in the second heat collecting pipe 37 from the heat collector 31 side to the heat storage tank 32. Heat storage tank 3
The heat collector 310,000 is installed on the second side, and water is supplied to the heat collector 31 from the bottom of the storage tank 132, and the heat collector 31 is connected to the heat collector 310,000. Water σ.

Switching means for returning to the upper part of the heat storage tank 32? It consists of The heat collector 31 is provided with an air vent valve 40 which is an air vent means, and air flows through the air vent valve 40i when water is supplied to the heat collector 31 and when water falls into the heat storage tank 32 after being heated. coming and going.

In addition, the heat collector 31 has a high temperature side sensor 4 of a differential temperature thermometer 41.
2 is provided, and 34 heat collecting pumps are controlled by the function of a low temperature side sensor 43 provided in the heat storage tank 32. Hot water is supplied from the heat storage tank 32 to the faucet 44 by the hot water supply pressure pump 4.
Performed at 6. When the faucets 44 are opened, the pressure stored between the check valve 46 and the hot water supply pressurization pump 45, which is about to stop, decreases. When the faucet 44 is closed, the discharge pressure of the hot water pressurizing pump 46 increases, so the pressure switch 47 is activated and the operation of the hot water pressurizing pump 46 (7) is stopped. A ball tap 4 is connected to the heat storage tank 32 from the water pipe 4B.
Water is supplied via 9. 50 is a separation pipe for preventing cold water from the tap from mixing with hot water in the heat storage tank 32. Reference numeral 61 denotes a flow rate switch, which is provided at the lower part of the heat collection pipe 33. This flow rate switch 61 is a one-way type, and is activated when water flows toward the heat collector 31.

62 is an expansion tank.

Next, the operation of this embodiment will be explained. The sun rises and heat collector 3
1 is heated by solar radiation, and when the difference between the high temperature side sensor 42 and low temperature side sensor 43 of the differential temperature thermometer 41 opens and reaches a predetermined set value, the electric two-way valve 35 opens and the heat collecting pump 34
starts driving.

The water in the heat storage tank 32 passes through the second heat collection pipe 37 and the second check valve 39, is pressurized by the heat collection pump 34, and is supplied to the heat collector 31 via the heat collection pipe 33. Sa【ru. At this time, the air that has entered the heat collector 31 and the heat collection pipe 33 is pushed out to the outside through an air vent valve 40 provided in the heat collector 31 and exhausted.

When the heat collector 31 is filled with water and the water supply ends, the flow of water stops, so the flow rate switch 61 is turned off, and the electric 20,000 valve 35 is turned off.
Fully closed, 33 heat collection pipes are blocked to prevent water from dripping from the heat collector 31, and then the heat collection pump 34 is turned off. Heat collector 3
When the difference between the hot water temperature in the heat storage tank 1 and the water temperature in the heat storage tank 32 increases and reaches a predetermined value, the high temperature side sensor 42 and the low temperature side sensor 43 are activated.
The differential temperature thermometer 41 operates to open the electric 20,000 valve 35, so that the heated water in the heat collector 31 is sent to the heat storage tank 32 via the heat collection pipe 33, just like when it is supplied. It's falling into the water. At this time, since backflow is prevented on the second heat collection pipe 37 side provided near the heat storage tank 32 by the action of the check valve 39, the hot water falling from the heat collector 31 is transferred to the first collection pipe 37. It passes through the heat pipe 36 side and returns to the upper part of the heat storage tank 32. Thereafter, the supply of water to the heat collector 31 and the falling of heated water are repeated in the same manner. Hot water in the heat storage tank 32 is supplied from the upper part of the heat storage tank 32 by a hot water supply pressure pump 45 in response to opening of the faucet 44.

This embodiment has an air vent valve 40i as an air venting means on the upper part of the heat collector 31, so when water is supplied from the heat storage tank 32 to the heat collector 31, the heat collector 31 and the heat collection piping 33 are closed. Air escapes quickly, and when the water falls after the temperature has risen, air enters through the air vent valve 4o, making it easier to fall into the water.

Since the hot water after falling water and rising in temperature is stored from the upper part of the heat storage tank 32, it is difficult to mix with the cold water in the heat storage tank 32, and high-temperature hot water can be supplied.

Further, when the water supply to the heat collector 31 is finished, the heat collecting pumps 34 are stopped, so the power cost of the heat collecting pumps 34 can be reduced. Furthermore, the heat collector 31 of the heat collection pump/34
Since the heat collection pipe 33 is closed by the on-off valve 36 when the water supply to the heat collector 31 is stopped, it has the effect of the embodiment, such as preventing water from dripping from the heat collector 31.

In the present invention, the heat collection piping from the heat storage tank to the heat collector is composed of one pipe, and this one heat collection pipe alternately supplies water to the heat collector and drains water, so that the following can be achieved. It has similar effects.

(1) There is only one heat collecting pipe from the heat storage tank to the heat collector, and no special water supply pipe is required, which simplifies construction and reduces costs.

(2) Since there is only one heat collection pipe, the heat radiation loss due to the power of the heat collection pipe can be halved, resulting in energy savings.

(3) The water in the heat storage tank is supplied to the water sound collector, and after the temperature rises, it is returned to the heat storage tank, so even if there is leftover water from the previous day, the temperature of the water in the heat storage tank is increased.

As described above, the present invention will bring about great effects. Ink 2m Sumi 3! ! ! 4

Claims (5)

[Claims] (1) A heat collector that collects all solar heat and a heat storage tank that stores hot water heated by the heat collector, and the heat collection piping from the heat storage tank to the heat collector is configured with a single pipe. A solar heat collection system configured so that a heat collection pump supplies hot water to the heat storage tank via the collection pipes, and after the water has been heated, the hot water from the heat collector is returned to the heat storage tank via the heat collection pipes. thermal equipment. (2) The solar heat collecting device according to claim 1, wherein the heat collector has an air venting means. (3) The heat collection pipe on the suction side of the heat collection pump branches into two,
Connect one side to the top of the heat storage tank and the other to the bottom of the heat storage tank.
The solar heat collector according to claim 1, further comprising a switching means for supplying hot water to the heat collector from the lower part of the heat storage tank and returning hot water from the heat collector to the upper part of the heat storage tank. thermal equipment. (4) The solar heat collecting device according to claim 1, characterized in that the heat collecting pump completely stops operating when the water supply to the heat collector is finished. (5) Claim 4 is characterized in that when the water supply operation of the heat collection pump to the heat collector is stopped, the heat collection piping is blocked by the on-off valve to prevent water from dripping from the heat collector. solar heat collector.