JPS5818039A - Hot-water supplying system - Google Patents

Abstract

PURPOSE:To enable to use an auxiliary heater having a small heating capacity by a method wherein a necessary amount of hot-water is secured beforehand at every time-band of a day to reduce a heat emitting loss by storing a large amount of hot-water at all times. CONSTITUTION:A hot-water reserving tank 9, for reserving and supplying the hot-water heated by utilizing the heat collection of solar heat, is provided and a plurality of temperature detectors 14, 15 are attached to the tank 9 at the different heights thereof, while the inner part of the hot-water reserving tank 9 is divided into a plurality of zones A, B having different amounts of the hot- water, from the upper part thereof in accordance with the attaching positions of the temperature detectors 14, 15. A plurality of circulating circuits 24, 25, for introducing the hot-water in respective zones A, B into the auxiliary heater 18 provided at the outside of the hot-water storgae tank 9 and returnning it into respective zones after an additional heating, are provided and respective circulating circuits are selected in accordance with a time, while the heating capacity of the ausiliary heater 18 is regulated by a control circuit 30 based on the signals of the temperature detectors 14, 15 positioned at the lower part of said respective zones.

Description

[Detailed description of the invention] The present invention relates to a water heater that utilizes solar heat.

Conventionally, this type of water heater has a hot water storage tank (21) with a built-in auxiliary heater (1) and a solar collector (3) as shown in Figure 1.
are connected by a circulation circuit (50) with a heat collection pump (4) interposed therein, and the city water supplied from the water supply pipe (6) communicating with the lower part of the hot water tank (2) is fed to the heat collection pump (4). During operation, the hot water is heated using solar heat, and further heated in the auxiliary heater (1) to a temperature suitable for tapping, and the hot water is supplied from the hot water tap (7).In this case, the auxiliary heater U) The hot water storage tank 121 is provided at a relatively lower portion ζ in order to cover the amount of hot water used in one day. For this reason, the auxiliary heater (1) needs to have a large heating capacity, increasing the cost of the entire device, and a large amount of high-temperature water is always stored in the hot water tank (2), which dissipates heat. The disadvantage was that the energy loss was large.

The present invention has been made in view of the above-mentioned facts, and focuses on the fact that the amount of hot water used per day varies depending on the time of day.
Multiple temperature detectors are installed at different heights of a hot water tank that stores hot water that is heated by collecting solar heat and provides hot water for hot water supply.The temperature detectors can be installed upwards inside the hot water tank depending on the position. The hot water is divided into multiple areas with different amounts of hot water, and the hot water in each area is guided to an auxiliary heater installed outside the hot water storage tank, and after reheating, multiple circulation circuits are installed in each area, and each circulation circuit is controlled at different times. By providing a control device that adjusts the heating capacity of the auxiliary heater based on the signal from the temperature sensor located at the bottom of each area, it is necessary to select the heating capacity at each time of the day. To provide a water heater capable of securing a sufficient amount of hot water in advance, eliminating heat radiation loss caused by constantly storing a large amount of hot water, and enabling the use of an auxiliary heater with a small heating capacity.

Hereinafter, one embodiment of the present invention will be described based on the drawings. In Figure 2 2, (8) is a solar heat collector, (9) is a hot water storage tank, and the lower part of the heat collector (8) and the heat storage tank (9) is connected to a heat collection pump OI. The outgoing pipe 01) and the return pipe a3 are connected to form a circulation circuit 03 of water as a heat medium. The hot water storage tank (9) has an upper part, an outgoing pipe (11), and a return pipe 03.
Temperature sensors 04 and 11 are respectively attached to the middle part of the tank, and the inside of the hot water tank is divided into an area above the temperature sensor 04 and an area B between the temperature sensors 041 and 119, and an area A is 1: Set to have enough hot water storage*V to be used in the washroom, kitchen, etc. during times other than bathing hours in the main household, and area B has enough hot water storage to be used during bathing hours. It is set as follows.

+18 is a pipe led out from the hot water storage tank (9) near the boundary layer between area A and area B, and is connected to the auxiliary heater side that grows the heat source aη using electricity, gas, oil, etc. and the circulation pump a9. The other end of the pipe Oe is connected to the inlet (200), outflow port (20a) of an electric three-way switching valve, and the pipe Q
11 to the upper end of area A, and the lower end of area B is connected to the upper end of area B through pipe 2, which has an inlet (200), an outlet 0 (20b) of a three-way switching valve, an outlet 0 (20b), and a check valve. It is connected to the. In this way, @1 circulation circuit (2
) and the second circulation circuit shown by the chain arrow are formed by sharing the piping (1G). ■ is a water supply pipe that communicates with the lower part of the hot water storage tank (9) at the same height as the outgoing pipe On, and the depressurization A check valve ■ is installed. (2) is a hot water outlet pipe led out from the top of the hot water storage tank (9),
Supply hot water to washrooms, bathrooms, etc.

(2) is a control device with a 24-hour program timer function, a time and humidity setting device AM, and a temperature sensor 041.
(Is) signal and controls the heat source on, the circulation pump aS to start and stop, and the three-way switching valve (2) to switch. 2 at a time predetermined by Otsu
The series time switches (2) and ■ are respectively switched to the b-Q sides, and when the detected temperature T2 of the temperature sensor O9 is higher than the setting humidity TS of the setting device @g2, one output point (1513%) is opened.
- The circulation pump aIJ and the heat source (2) are energized, and the three-way switching valve (2) is energized so that the inflow is zero (2
0G) and the outlet (20b).

Also, outside of the above time periods, the time switch (2), (to)
are switched to the a-0 side, and the circulation pump a9 and the heat source (Iη are energized through the output contact (141), which opens when the detected temperature T1 of the temperature detector 04 exceeds the set temperature T81 of the setting device (2). The three-way switching valve ■ is de-energized and communicates between the inlet 0 (20G) and the outlet (20m).The special start/stop control of the heat collecting pump is omitted in ζζ, and the temperature difference type , Hatochi's heat collection methods such as solar radiation detection methods can be applied.

The operation of the above-described embodiment will now be explained with reference to the flowchart in Figure s4 and the time chart in Figure 5. The time and temperature setting device Ω is set and the time zone is set from +81 to t.
82 (CC-t”ltl 7:00-19:00) and T
Then, the time switch (
(to) and (to) are on the a -0 side. Therefore, since the °C direction switching valve ■ is not energized, the inflow 0 (20Q) and the outflow 0 (20m) are communicated, and the inflow port (20Q) and the outflow port (20b) are cut off. circulation 18
e4 is selected. In this case, during the heat collection time, the heat collection pump OI operates, and the cold water at the bottom of the hot water storage tank (9) is sent to the solar collector (8), where it is heated and returned to the hot water storage tank (9). By repeating this process, the entire water in the hot water tank (9) supplied from the water supply pipe (2) is heated using solar heat.

Furthermore, the hot water in area A is heated by the heat source (171) and the circulation pump (
Because 19 is activated,! The water circulates through the 81 circulation circuit @ circle and is heated by an auxiliary heater, heated to a temperature higher than the set temperature TSj, and ready for hot water supply to the kitchen, washroom, etc.

When entering the preset time period (ts1 to ts2), the three-way switching valve ■ switches between the inlet (200) and the outlet (200).
b) The second Confucian ring circuit ■
is selected. Therefore, the detected temperature T of the temperature sensor 09
#1%#an and @ring pump αS are started and stopped so that the hot water temperature TS2 is higher than the set hot water TS2, and the hot water in area B is heated by the auxiliary heater αa, and hot water is supplied to the bathroom in a few hours. Add 1 to Of course, it is also possible to use the hot water in this case (A and B) in the bathroom. In addition, the check valve port is the inlet (200) of the three-way switching valve ■ and the outlet 0 (20bJ). This is to prevent water from getting mixed in, and the pressure-reducing release valve surface is to replenish the hot water discharged from the hot water storage tank (9) from the water supply pipe.

FIG. 6 shows another embodiment of the present invention, and shows a second embodiment of the present invention.
The same symbols are attached to the parts corresponding to those in the diagram, and in this case, the difference from the first one
6+ is led out from the top of the hot water storage tank (9), and the other end of the piping ice is connected to the inlet (20Q) and outlet (20Q) of the three-way switching valve ■.
The lower part S of area A is connected to the lower part S of area A via 0a) and piping rlD, and is also connected to the lower part of ura area B via the inlet (20Q) and outlet (2nb) of Sanman switching valve brewing and piping r2:1. The first circulation circuit +2.11 reheats the hot water in area A, and the second circulation circuit 6 reheats the hot water in area (A+8).

According to this actual case, it is possible to heat up the necessary amount of hot water at each time of the day, which reduces loss due to heat radiation, and the auxiliary heater can be used for 0 seconds. An efficient and economical water heater can be realized, such as by using a water heater with a small heating capacity as the heat source 071. Also, circulation
Since the auxiliary heater OS and the piping Cl61 with the circulation pump Ql are installed in the 111101 path (2) and -, only one circulation pump a9 is required, and the piping work is easy.

As mentioned above, the present invention provides a storage tank #J for storing hot water heated using solar heat and supplying hot water, and a plurality of temperature detectors are installed at different heights of the hot water storage tank. Vff and the temperature sensor were installed by dividing the inside of the hot water tank from above into multiple areas with different amounts of hot water depending on the location, and reheating the hot water in each area by guiding it to an auxiliary heater installed outside the hot water tank. Later, a plurality of circulation circuits are provided in each area, and each circulation circuit is selected according to the time, and the heating capacity of the auxiliary heater is determined based on the signal from the temperature sensor located at the bottom of each area. Since it is equipped with a control device, it is possible to heat up the required amount of hot water for each time of the day in advance, and the heat loss is significantly reduced compared to conventional methods that constantly store a large amount of hot water. This makes it possible to secure the required amount of hot water by using an auxiliary heater with a small heating capacity, which makes it possible to realize an economical and efficient water heater. By sharing a part of the circulation circuit, the number of circulation pumps 7 can be reduced and piping work can be easily done.

[Brief explanation of the drawing]

FIG. 181 is a system diagram showing an example of a conventional device, and FIG. 2 is a system diagram showing an embodiment of the device of the present invention. 3 is a principle circuit diagram of the control device used in FIG. 2, FIG. It is a system diagram showing an example. (9)... Hot water tank, 04, ari... Temperature detector,
q barrel..., auxiliary heater, a9... circulation pump, ■
...Three-way switching explanation...control device, IAJ%β)・
··region.

Claims (1)

[Claims] +11 A hot water storage tank is provided to store hot water heated by collecting solar heat and provide hot water, and a plurality of temperature detectors are installed at different heights of the hot water storage tank, and the temperature The detector is installed by dividing the inside of the hot water tank from above into multiple areas with different amounts of hot water depending on the location, and installing an auxiliary heater (two-channel, reheating, and The return T is equipped with a control device that has multiple circulation circuits, selects each circulation circuit according to the time, and adjusts the heating capacity of the auxiliary heater based on the signal from the temperature sensor located at the bottom of each area. 121 A plurality of circulation circuits are connected at one end to a common section of each region of the storage tank, and share a circuit in which an auxiliary heater and a circulation pump are interposed, and other circuits are connected to each other. 2. The hot water supply circuit according to claim 1, wherein one end of each region is connected to the other portion C of each region via a switching valve.