JP3686438B2 - Solar thermal gas bath equipment - Google Patents

Description

[0001]
[Industrial application fields]
The present invention relates to an automatic gas bath apparatus using a solar water heater.
[0002]
[Prior art]
In general, when using a solar water heater to fill the bathtub with hot water, inject the solar hot water directly into the bathtub, then fill it with tap water if the temperature is too high and adjust the temperature by chasing it if it is low Is normal. However, if you try to use this solar hot water in combination with a so-called fully automatic bath that automatically adjusts the hot water temperature and water level of the bathtub and automatically `` hot water fills '', there are the following problems, It has not been put into practical use yet.
[0003]
[Problems to be solved by the invention]
Fig. 1 (a) shows the case where solar hot water is joined to the downstream side of the hot water heat exchanger 1 via the mixing valve 6 with a temperature adjusting function, and the temperature of the solar hot water reaches a required temperature (for example, 42 ° C). If not, tap water is heated by the heat exchanger 1 and supplied to the bathtub. If the hot water is higher than 42 ° C., the hot water and tap water are mixed at an appropriate ratio by the mixing valve 6. To supply to the bathtub. However, in this method, even when the temperature of the solar hot water is slightly lower than 42 ° C., hot water is supplied from the heat exchanger 1 side. There is a drawback in that solar hot water that must be heated and that is warmed up cannot be used effectively. In order to eliminate this drawback, as shown in FIG. 1 (b), a method of providing a mixing valve 6 on the upstream side of the heat exchanger 1 to join the solar hot water is the adjustment of the hot water tap 2 or the hot water temperature of the shower. Is performed by control of the mixing valve 6 and the burner 1a far away from the hot water tap 2, and there is a problem that it takes too much time to stabilize the hot water temperature. In order to avoid this, as shown in FIG. 1 (c), the method of mixing tap water on the downstream side of the heat exchanger 1 is such that hot solar hot water having a temperature as high as 90 ° C. is directly heated in the summer. Since it is supplied to the exchanger 1, the O-ring used for the seal of the pipe connection portion of the heat exchanger 1 is deteriorated, and the life of the flow sensor used in the heat exchanger is shortened. There is a drawback. The object of the present invention is to solve the above-mentioned problems, and to provide a solar heat fully automatic gas bath apparatus that does not have a risk of deteriorating the seal of the heat exchanger 1 with solar hot water and that has good responsiveness at a reasonable cost. It is what.
[0004]
[Means for Solving the Problems]
As shown in FIG. 2, the solar heat utilizing gas bath apparatus according to the present invention branches a bathtub hot-water supply pipe 4 from a hot-water supply pipe 3 extending from the hot water supply heat exchanger 1 to the hot-water tap 2, and solar heat is supplied to the bathtub hot-water supply pipe 4. The hot water pipe 5 is joined via the mixing valve 6 and the hot water supply pipe 4 is joined upstream of the reheating heat exchanger 8 in the reheating pipe 7 via the three-way valve 9 so that the temperature Tt of the solar hot water is When the temperature is lower than the tap water Ts, the hot water supply heat exchanger 1 raises the tap water to the required bath temperature Ty. When the solar hot water temperature Tt is higher than the required bath temperature Ty, the mixing valve 6 causes the solar hot water and the water to flow. Water is mixed at an appropriate ratio, and when the temperature Tt of the solar hot water is lower than the required bath temperature Ty and higher than the tap water temperature Ts, the hot water is heated to the required bath temperature Ty by the reheating heat exchanger 8. , I'll feed it to the bathtub 10 It is obtained by the.
[0005]
[Action]
The feature of the present invention is that, as shown in FIG. 3, solar heat water is used as shown in FIG. 3 by using the heat exchanger 8 for reheating that has been conventionally used only for reheating as shown in FIG. When the temperature Tt is lower than the bath required temperature Ty and higher than the tap water temperature Ts, the solar heat water is heated up to the bath required temperature Ty by the reheating heat exchanger 8 and supplied to the bath 10. With this configuration, even when the temperature of solar hot water is insufficient for bathing temperature, solar heat can always be used effectively as long as it is higher than the temperature of tap water, and automatic "hot water" operation is thereby possible As a result, it was possible to save the trouble of replenishing the hot water in the bathtub once.
[0006]
【Example】
FIGS. 2-5 shows one Example of the solar heat utilization gas bath apparatus by this invention, The heat exchanger 1 for hot water supply for heating tap water and supplying hot water to the hot-water tap 2 and the bathtub 10; A reheating heat exchanger 8 that recirculates hot water in the bathtub 10 by a pump 11 and a mixing valve 6 that joins hot water heated by solar heat from a solar water heater (not shown) to the bathtub hot water supply pipe 4. It is constituted by. The bathtub hot water supply pipe 4 is branched from a hot water supply pipe 3 extending from the hot water supply heat exchanger 1 to the hot water tap 2, and the tip of the bathtub hot water supply pipe 4 is upstream of the additional heat exchanger 8 in the additional piping 7. The mixing valve 6 with a temperature adjusting function, which is interposed in the middle of the three-way valve 9, has a dial for setting the temperature, and is supplied with solar hot water and hot water supply heat supplied from the solar hot water pipe 5 The tap water supplied from the exchanger 1 side is mixed at an appropriate ratio to output hot water having a set temperature.
[0007]
FIGS. 2 to 4 show the state during the “hot water filling” operation in the apparatus of the present invention in three cases according to the temperature range of the solar hot water. First, in FIG. 2, the flow path indicated by a thick line shows a state when the temperature Tt of the solar hot water is lower than the tap water Ts, and all the hot water for filling the bathtub 10 is for supplying hot water. It is supplied by heating with the heat exchanger 1. Therefore, at this time, the burner 1a of the hot water supply heat exchanger 1 is ignited, and the burner of the reheating heat exchanger 8 is not ignited. Next, FIG. 3 shows a state when the temperature Tt of the solar hot water is lower than the bath required temperature Ty and higher than the tap water temperature Ts. In this case, the reheating heat exchanger 8 is set to “hot water filling”. Therefore, the solar hot water is heated up to the bathtub required temperature Ty and supplied to the bathtub 10. Further, FIG. 4 shows a state where the temperature Tt of the solar hot water is higher than the required bath temperature Ty. In this case, the heat exchangers 1 and 8 are not operated, and the solar hot water and tap water are supplied by the mixing valve 6. Mix in an appropriate ratio and supply to the bathtub 10. FIG. 5 shows a state when the reheating operation is performed by the apparatus of the present invention. At this time, the three-way valve 9 is switched to the reheating piping 7 side.
[0008]
【The invention's effect】
As described above, the present invention uses the heat exchanger 8 that has been conventionally used only for reheating, also during “hot water filling”, so that the temperature Tt of solar hot water is lower than the required bath temperature Ty and the temperature of tap water. When the temperature is higher than Ts, the temperature of the solar hot water is raised to the required bath temperature Ty so that it can be supplied to the bathtub 10. With this configuration, even if the temperature of the solar hot water is insufficient for the bathing temperature, As long as it is higher than the temperature of the water, there is an advantage that solar heat can always be used effectively, and this enables economic automatic "hot water filling" that uses solar heat. Therefore, there is an advantage that it is possible to save the trouble of filling the water or replenishing the water. The three-way valve 7 used in the configuration of the present invention can also be configured using two solenoid valves. If the pump 11 has a structure that does not flow backward, one solenoid valve is omitted. It is also possible.
[Brief description of the drawings]
1A, 1B, and 1C are system diagrams of a conventional example.
FIG. 2 is a system diagram of an embodiment of the present invention.
FIG. 3 is a system diagram showing a use state of the above.
FIG. 4 is a system diagram showing another use state of the above.
FIG. 5 is a system diagram showing still another use state of the above.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Heat exchanger 1a Burner 2 Hot-water tap 3 Hot-water tap piping 4 Bath hot water piping 5 Solar hot water piping 6 Mixing valve 7 Reheating piping 8 Reheating heat exchanger 8a Burner 9 Three-way valve 10 Bath 11 Pump

Claims (1)

The hot water supply pipe from the hot water supply heat exchanger to the hot water tap is branched off from the hot water supply pipe, and the hot water hot water pipe is joined to the hot water supply pipe via the mixing valve. When the temperature of solar hot water is lower than that of tap water, the temperature of the hot water is raised to the required temperature of the bathtub with the heat exchanger for hot water. When the temperature is higher than the required temperature of the bathtub, the hot water and tap water are mixed at an appropriate ratio by the mixing valve.When the temperature of the solar hot water is lower than the required temperature of the bathtub and higher than the tap water, A solar-powered gas bath device that is heated to the required temperature of the bathtub and supplied to the bathtub.

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