JPH0668383B2 - Hot water heating system - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot water heating device including a hot water heating device, a hot water circulation pump, and a hot water temperature controller using water as a heat medium.

2. Description of the Related Art In this type of conventional hot water heating apparatus, the temperature of hot water that can be simultaneously supplied from one device is one type (for example, 80
C).

Hereinafter, an example of the above-described conventional hot water heating device will be described with reference to the drawings.

Hereinafter, an example of the above-described conventional hot water heating device will be described with reference to the drawings.

FIG. 2 shows the structure of a conventional hot water heating apparatus. 1 is an exterior body, 2 is a hot water circulation pump, 20 is a heat exchanger for heating hot water, and 22 is a heater thereof. 21 is a heater 22
To control the hot water temperature so as to keep it constant, 23 is a hot water outflow pipe, 24 and 25 are heaters connected in parallel, 11 is a hot water return pipe, 12 is an expansion tank, 13
Indicates a tank outlet pipe. And the heaters 24 and 2
The hot water pipe to 5 branches at the branch point 26 of the hot water outflow pipe 23, joins at the confluence point 27 of the hot water return pipe 11, and is connected so as to return to the expansion tank 12.

The operation of the hot water heating device configured as described above will be described below.

First, the hot water pressurized by the hot water circulation pump 2 is heated by the heater 22 in the heat exchanger 20. At that time, the hot water temperature controller 21 acts on the heater 22 to maintain the temperature at 80 ° C. The hot water that has reached 80 ° C passes through the hot water outflow pipe 23,
After branching at the branching point 26 and performing heating work by the heaters 24 and 25, it joins at the confluent point 27 and returns to the expansion tank 12 via the hot water return pipe 11, enters the hot water circulation pump 2 again, and enters the hot water circulation circuit. To form.

Problems to be Solved by the Invention However, in the above configuration, the heaters 24, 25
There are two or more places, and even if they are used for different purposes, only the hot water of the same temperature flows, so even if it is an appropriate temperature for the hot water going to one of the heaters, It had a problem of passing.

In view of the above problems, the present invention provides a hot water heating device capable of supplying hot hot water and hot hot water at high temperature and low temperature at the same time or individually by one hot water circulation pump and one expansion tank.

Means for Solving the Problems In order to solve the above problems, the hot water heater of the present invention includes a primary heat exchanger connected to a set of expansion tanks and a pump for circulating hot water, and a primary heat exchanger of the primary heat exchanger. A secondary heat exchanger connected to the outlet side to raise the hot water temperature from the primary heat exchanger,
It is provided with a heater having a different load connected between the outlet side of each heat exchanger and the expansion tank.

Effect The present invention can reliably obtain high-temperature / low-temperature hot water simultaneously or independently by one hot water circulation pump and an expansion tank by the above-mentioned configuration, and two kinds of heating, for example, normal heating with 80 ° C hot water and 60 ° C. It is possible to simultaneously or independently obtain a low temperature heating function such as floor heating with hot water.

Embodiment A hot water heating apparatus according to an embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows the configuration of a hot water heating apparatus according to an embodiment of the present invention. A heater 6 which is controlled by the primary hot water temperature controller 4 on the downstream side of the hot water circulation pump 2 connected to the expansion tank 12.
The primary heat exchanger 3 for heating hot water is connected to the hot water circuit, and the branch point 5 at the outlet thereof is branched into the hot water circuits A and B. Then, one of the branched hot water circuits is connected to the low temperature water outflow pipe 7 → the low temperature heater 8 → the low temperature water return pipe 9 → the confluence point 10 → the hot water return pipe 11 → the expansion tank 12 → the tank outlet pipe 13.
On the other hand, a secondary heat exchanger 14 for secondary heating of hot water by the secondary heater 15 which is under the control of the secondary hot water temperature controller 15 is connected to the branch point 5 and the hot water outflow pipe 17 → high temperature heater 18-> high temperature water return pipe 19-> confluence point 10-> hot water return pipe 1
1 → Expansion tank 12 is connected so that hot water flows.

The operation of the hot water heating apparatus configured as described above will be described below with reference to FIG.

The hot water pressurized by the hot water circulation pump 2 is supplied to the primary heat exchanger 3
Then, it is heated to about 60 ° C., reaches the low temperature heater 8 from the low temperature water outflow pipe 7 via the branch point 5, and does work. The low temperature water which has worked and has reached about 40 ° C. flows through the low temperature water return pipe 9 → the confluence point 10 → the hot water return pipe 11 → the expansion tank 12 for recirculation.

The hot water of about 60 ° C. flowing from the branch point 5 to the other hot water circuit B flows to the secondary heat exchanger 14 and the secondary hot water controller 15, and is heated to about 80 ° C. by the secondary heater 16. Next, it is heated and flows from the high-temperature water outflow pipe 17 to the high-temperature heater 18 to perform heating work, and the temperature drops to about 50 to 60 ° C. The lowered high-temperature water flows through the high-temperature water return pipe 19, joins the hot water from the low-temperature water return pipe 9 at the confluence point 10, and passes through the hot-water return pipe 11 to be repeatedly recirculated into the expansion tank to form a hot-water circuit.

As described above, according to the present embodiment, the primary hot water temperature controller 4
The hot water circuit is branched at the branch point 5 on the downstream side of the primary heat exchanger 3 in which hot water is heated by the primary heater 6 controlled by, and one is connected to the expansion tank 12 via the low temperature heater 8. By forming the low-temperature water circuit, low-temperature hot water suitable for low-temperature water heating can always be obtained. On the other hand, the secondary heat exchanger connected downstream of the primary heat exchanger is secondarily heated to form high-temperature water, which forms a high-temperature water circuit that works in the high-temperature heater 18 and returns to the expansion tank 12. Therefore, hot water suitable for high-temperature water heating can always be obtained. In other words, with a set of hot water circulation pump and expansion tank, high or low 2
Hot water of different temperatures can be supplied.

EFFECTS OF THE INVENTION As described above, according to the present invention, a primary heat exchanger is connected to a set of an expansion tank and a hot water circulation pump, and the hot water temperature is heated to a temperature higher than that of the primary heat exchanger downstream of the primary heat exchanger. Since the next heat exchanger was connected, and a heater with a different load was connected between the downstream of each heat exchanger and the expansion tank,
For example, hot water for each of high temperature and low temperature can be obtained simultaneously or independently by one hot water circulation pump and one expansion tank.

Therefore, it is possible to easily and inexpensively and reliably obtain the hot / low temperature hot water heating function.

[Brief description of drawings]

FIG. 1 is a block diagram of a hot water heating system according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional hot water heating system. 2 ... Hot water circulation pump, 3 ... Primary heat exchanger, 8 ... Low temperature heater (one heater), 12 ... Expansion tank, 14
...... Secondary heat exchanger, 18 ...... High temperature heater (other heater).

Claims (1)

[Claims] 1. A set of an expansion tank for hot water and a pump for circulating hot water, a primary heat exchanger connected to the circulation pump, and an outlet side of the primary heat exchanger, which is connected to the primary heat exchanger. A hot water heating device comprising: a secondary heat exchanger that raises the hot water temperature; and a heater that is connected between the outlet side of each heat exchanger and the expansion tank and has a different load.