JPS634916Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention consists of a hot water storage tank that has an outflow port at the bottom and an inflow port at the top, one end of which is connected via a circulation pump to the outflow port of the hot water storage tank, and the other end of which is connected to the outflow port of the hot water storage tank through a circulation pump. is connected by piping to the inlet of the hot water storage tank,
Furthermore, it is equipped with a heat exchanger that removes heat from other heat source equipment, and by operating the circulation pump, the water in the hot water storage tank is circulated through the heat exchanger, thereby exchanging heat in the heat exchanger part and producing hot water. This relates to an electric water heater that stores hot water sequentially from the top of the hot water storage tank, and its purpose is to make it possible to arbitrarily vary the boiling water temperature in the hot water storage tank depending on the season of use, number of users, etc. shall be.

Hereinafter, the present invention will be explained based on the drawings showing one embodiment thereof. In FIG. 1, reference numeral 1 denotes a hot water storage tank, and this hot water storage tank 1 has an inlet 2 at the top and an outlet 3 at the bottom of the body. 4
is a heat source device consisting of a heat pump, and the heat source device 4 has a heat exchanger 4a. 5 is a heat exchanger provided so as to be in contact with the heat exchanger 4a of the other heat source device 4, and one end of this heat exchanger 5 is connected via a circulation pump 6 to the outlet 3 of the hot water storage tank 1 through piping. , and the other end is connected to the inlet 2 of the hot water storage tank 1 via piping. Reference numerals 7a and 7b denote a plurality of passages constructed between the heat exchanger 5 and the inlet 2 of the hot water storage tank 1, and these passages 7a and 7b are provided with hot water temperature regulating valves 8a and 7b having different set temperatures, respectively. 8b
has been established. Reference numeral 9 denotes an electromagnetic contact valve provided between the plurality of passages 7a, 7b and the heat exchanger 5. As shown in FIG.
a, 10b, and the plurality of passages 7
On-off valves 11a and 11 that open and close a and 7b, respectively
b. Reference numeral 12 denotes a hot water supply pipe drawn out from the middle of a pipe connecting the inlet 2 of the hot water storage tank 1 and a plurality of passages 7a, 7b having hot water temperature adjustment valves 8a, 8b.
A hot water faucet 13 is provided at the tip of 2. 14 is a water supply pipe connected to the lower body of the hot water storage tank 1.

FIG. 3 shows an electric circuit according to an embodiment of the present invention, in which 15 is an AC power source, and the other heat source equipment 4
are connected in series to this AC power source 15, and the energizing coils 10a, 10b of the electromagnetic contact valve 9 are connected in parallel to the other heat source device 4 via a changeover switch 16.

The operation in the above configuration will be explained. Tap water is supplied into the hot water storage tank 1 via the water supply pipe 14, and when the circulation pump 6 and other heat source device 4 are energized in this state, the water in the hot water storage tank 1 is supplied to the circulation pump 6.
By this operation, a circulating operation is performed in which hot water returns to the hot water storage tank 1 from the inlet 2 of the hot water storage tank 1 via the heat exchanger 5 and the hot water temperature adjustment valve 9. In this circulation operation, the water in the hot water storage tank 1 absorbs the heat generated by the other heat source device 4 at the heat exchanger 5 and becomes hot water, and this hot water flows into the hot water storage tank 1 from the inlet 2 of the hot water storage tank 1. The hot water enters the hot water storage tank 1 and is sequentially stored from the top. At this time, if the flow rate of the circulation pump 6 is high, the temperature of the hot water will be low, so the hot water temperature regulating valve 8a,
The hot water temperature regulating valves 8a and 8b are not shown, but generally have built-in temperature sensing elements made of wax pellets. By controlling the flow rate of the fluid according to the set temperature of the temperature sensing element, the temperature of the fluid flowing out from the outlet of the hot water temperature regulating valve becomes the set temperature. The set temperature is set to different temperatures, for example, 50℃ and 60℃.

Therefore, depending on the season of use, the number of users, etc., the user can, for example, adjust the temperature of the boiling water in the hot water storage tank 1 to 50°C.
If you want to set the temperature to ℃, turn the switch 1 shown in Figure 3.
6 is closed on the energizing coil 10a side of the electromagnetic contact valve 9, the energizing coil 10a is energized and the opening/closing valve 11 is energized.
Since the passage 7a having the hot water temperature adjustment valve 8a is opened, the hot water that has been heat exchanged by the heat exchanger 5 reaches the inlet 2 of the hot water storage tank 1 through the passage 7a. In this case, the hot water temperature is controlled to 50° C. by the hot water temperature regulating valve 8a.

If you want to raise the temperature of the boiling water in the hot water storage tank 1 to 60°C, close the changeover switch 17 shown in FIG. Since the passage 7b having the hot water temperature adjustment valve 8b is opened, the hot water that has been heat exchanged by the heat exchanger 5 reaches the inlet 2 of the hot water storage tank 1 through the passage 7b. in this case,
The hot water temperature is controlled at 60°C by a hot water temperature regulating valve 9b.

As described above, according to the present invention, a plurality of passages having hot water temperature regulating valves with different set temperatures are configured between the heat exchanger and the inlet of the hot water storage tank, and the plurality of passages and Since an electromagnetic contact valve is installed between the heat exchanger and the heat exchanger, the user can easily switch between the electromagnetic contact valves depending on the season of use, the number of users, etc. This provides an excellent effect in that the boiling temperature of the hot water storage tank can be changed at will.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of the piping structure of an electric water heater showing an embodiment of the present invention, FIG. 2 is a vertical cross-sectional view of a main part of the water heater, and FIG. 3 is an electric circuit diagram of the water heater. 1... Hot water storage tank, 2... Inlet, 3... Outlet, 4... Other heat source equipment, 5... Heat exchanger, 6... Circulation pump, 7a, 7b... Passage, 8a, 8b...
Hot water temperature adjustment valve, 9...electromagnetic contact valve.

Claims (1)

[Scope of utility model claims] A hot water storage tank having an outlet at the bottom and an inlet at the top, one end of which is connected via a circulation pump to the inlet of the hot water storage tank, and the other end of which is connected to the inlet of the hot water storage tank by piping. , further comprising a heat exchanger that removes heat from other heat source equipment, and a plurality of passages having hot water temperature adjustment valves each having a different set temperature between the heat exchanger and the inlet of the hot water storage tank. An electric water heater characterized in that an electromagnetic contact valve for selectively switching between the plurality of passages is provided between the plurality of passages and the heat exchanger.