JPS6026352Y2 - solar water heater - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a solar water heater.

FIG. 1 shows an example of a conventional solar water heater.

This solar water heater is a one-overflow type solar water heater, in which the water supplied through the distillation tank 1 is temporarily stored in a hot water storage tank 2, and a heat collector (not shown) communicates with the lower part of the hot water storage tank 2. ), water from the lower part of the hot water storage tank is introduced and circulated and heated by solar heat, and hot water is discharged from the faucet 4 via a hot water supply pipe 3 from the upper part of the hot water storage tank where high temperature water is unevenly distributed.

In this solar water heater, hot water is supplied from the upper part of the hot water storage tank where high-temperature water is unevenly distributed, so at the beginning of hot water supply, the high-temperature water from the upper part is taken out from the faucet 4, but from the middle of hot water supply, the As the cold water replenished into the hot water storage tank 2 mixes with the already heated high temperature water, the hot water temperature drops within a range, resulting in a large difference in hot water temperature between the beginning and end of hot water supply, resulting in constant temperature hot water supply. can't do it.

Fig. 2 shows a conventional example of a rod-type solar water heater in which hot water is discharged from the lower part of the hot water storage tank 2' through a hot water supply pipe 3', in place of the conventional example. Water heaters have the characteristic that the hot water temperature immediately after hot water supply starts is low and the temperature gradually rises thereafter, and similarly has the disadvantage that hot water cannot be supplied at a desired constant temperature.

Therefore, the purpose of this invention is to provide a solar water heater that can maintain the hot water temperature constant.

An embodiment of this invention is shown in FIGS. 3 and 4.

That is, this solar water heater communicates with a first hot water storage tank 6a that stores ice supplied through the distillation tank 5, and a lower part of the first hot water storage tank 6a to introduce water from the lower part of the first hot water storage tank and generate solar heat. a heat collector 7a that circulates and heats the water, and a second hot water storage that communicates its lower layer with the upper layer of the first hot water storage tank 6a and sequentially pumps and temporarily stores high-temperature water concentrated in the upper layer of the first hot water storage tank 6a. A tank 6b, a third hot water storage tank 6C whose lower part communicates with the upper part of the second hot water storage tank 6b, and which sequentially pumps and temporarily stores high temperature water in the upper part of the second hot water storage tank 6b, and a second hot water storage tank 6C. Heat collectors 7b and 7c are connected to the upper part of the third hot water storage tank 6C, and are connected to the upper part of the third hot water storage tank 6C. Hot water is supplied from a faucet 10 via a hot water supply pipe 9.

With this configuration, in the second hot water storage tank 6C from which the stored hot water is directly pumped out via the hot water supply pipe 9, hot water is replenished from the upper part of the third hot water storage tank 6b as hot water is supplied, and as the hot water supply progresses, new hot water is added. Even if the inflowing hot water and the hot water concentrated in the upper part of the third hot water storage tank mix, the hot water outlet temperature does not drop, and a constant outlet temperature can be maintained at all times.

Furthermore, the hot water flowing into the third hot water storage tank 6c is obtained by reheating the hot water pumped out from the upper part of the first hot water storage tank 6a in the heat collector 7b, and pumping it out from the upper part where high temperature water is unevenly distributed. Therefore, constant temperature hot water supply can be performed even more smoothly without being affected by a drop in hot water temperature due to mixing of make-up water and heated water in the first hot water storage tank 6a.

In this embodiment, the hot water storage tank is divided into three stages, but it goes without saying that the hot water temperature can be kept constant even with only two stages.

Another embodiment of this invention is shown in FIGS. 5 and 6.

That is, this solar water heater has a first hot water storage tank 6'a that stores water supplied from the distiller 5', and a second hot water storage tank 6'a whose lower part communicates with the upper part of the first hot water tank 6'a.
a hot water storage tank 6'a, the first hot water storage tank 6'a
and the communication portion 11 of the second hot water storage tank 6'b is connected to a solenoid valve that closes when the hot water level of the second hot water storage tank 6'b rises to a predetermined high water level LA and opens when the water level drops to a predetermined low water level La. 12, the first hot water storage tank 6 is controlled to open and close until the hot water level in the second hot water storage tank 6'b falls to a predetermined low water level LB.
The pumping of hot water from 'a to the second hot water storage tank 6'b is temporarily stopped, and the new hot water flowing from the first hot water storage tank 6'a and the high temperature hot water in the second hot water storage tank 6'b are mixed. The system is designed to avoid this and maintain a constant hot water temperature.

In order to perform the above function, the hot water supply pipe 9' is connected to the lower part of the second hot water storage tank 6'b.

The opening/closing control of the solenoid valve 12 is performed by the second hot water storage tank 6'.
Float switch 13 floating in the second hot water storage tank 6'b.
When the float 13a reaches the low water level LB, a valve opening command is given to the electromagnetic valve 12, and when the float 13a rises to the high water level LA, a valve closing command is given.

The first hot water storage tank 6'a and the second hot water storage tank 6'b
Each is provided with a heat collector (not shown) that communicates with each lower layer as in the previous embodiment.

Because of this configuration, in the second hot water storage tank 6'b,
This tank 6 until the hot water level drops to the predetermined low water level LB.
The hot water in 'b will continue to be dispensed as is, and will not mix with the hot water in the first hot water storage tank 46'a (this hot water is usually lower in temperature than the hot water in the second hot water storage tank 6'b) on the way. , it is possible to always maintain a constant hot water temperature.

In addition, since the hot water pumped out from the first hot water storage tank 6'a is heated again in the second hot water storage tank 6'b, the hot water temperature is increased by mixing makeup water and heated water in the first hot water storage tank 6'a. Hot water supply at a constant temperature can be performed smoothly without affecting the temperature of the hot water.

As described above, the solar water heater C of the second invention has a first hot water storage tank that is supplied with water from the lower part, and a first hot water storage tank that communicates with the lower part of the first hot water storage tank to store water in the first hot water storage tank. a first heat collector that circulates and heats with solar heat; a second hot water tank whose lower part communicates with the upper part of the first hot water storage tank to introduce and store hot water from the first hot water tank; , a second heat collector that communicates with the lower part of the tank and reheats the hot water stored in the second hot water storage tank using solar heat, and a hot water supply unit that pumps out the hot water from the second hot water storage tank. The hot water outlet temperature is not affected by the drop in hot water temperature due to the mixing of make-up water and heated water in the first hot water storage tank, and has the effect that a constant outlet temperature can be maintained at all times.

[Brief explanation of drawings]

Fig. 1 is a schematic diagram of a conventional example, Fig. 2 is a schematic diagram of another conventional example, and Figs. 3 and 4 are partially cutaway perspective views and partially omitted views showing one embodiment of this invention, respectively. Schematic diagram, 5th
This figure and FIG. 6 are a schematic sectional view and a partially cutaway perspective view showing another embodiment of this invention, respectively. 5.5'-------disterne, 6at 6bt
6ct6' a 9 6' b ””Hot water tank,? a, 7b, 7c... Heat collector, 9,
9'...Hot water pipe, 10,10'...
- Faucet, 11...Communication section, 12...Solenoid valve, 13...Float switch.

Claims (3)

[Scope of utility model registration request] (1) A first hot water storage tank that is supplied with water from a lower part, and a first hot water storage tank that communicates with the lower part of the first hot water storage tank.
a first heat collector that circulates and heats water stored in a hot water storage tank using solar heat; a second hot water storage tank that communicates a lower part with an upper part of the first hot water storage tank and introduces and stores hot water in the first hot water storage tank;
A solar hot water system comprising: a second heat collector that communicates with the lower part of the second hot water storage tank and reheats the hot water stored in the second hot water storage tank using solar heat; and a hot water supply unit that pumps out hot water from the second hot water storage tank. vessel. (2) The second hot water storage tank is made up of multiple stages, and the upper part of the previous hot water storage tank is connected to the lower part of the next stage hot water storage tank in sequence, and the hot water supply section is connected to the upper part of the last stage of the hot water storage tank. A solar water heater according to claim (1) of the utility model registration claim, which is connected to a hot water supply pipe. (3) The second hot water storage tank is provided with an electromagnetic valve in the communication portion with the first hot water storage tank that closes when the hot water level rises to a predetermined high water level and opens when the water level falls to a predetermined low water level; The hot water supply section is a system in which a hot water supply pipe is connected to the lower part of the second hot water storage tank.
The solar water heater described in item 1).