JPS5818106Y2 - Hot water heating system - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a hot water supply and heating device in which a boiler is provided with a hot water supply circuit and a heating circuit.

Generally, in this type of hot water heating system using a so-called two-can boiler, a supply pipe is connected to the hot water circuit provided in the boiler, and hot water is supplied to the kitchen, washroom, etc. through this supply pipe.
In addition to supplying water to bathtubs and the like, the heating circuit is connected to radiators such as panel heaters and fan coil units to heat the room.

By the way, in such a hot water supply/heating system, the amount of heat required in the heating circuit is almost constant, but the amount of heat required in the hot water supply circuit varies depending on whether, for example, a large amount of hot water is continuously supplied to a bathtub, or it is used in many places at the same time. It is extremely unstable, and is larger than a heating circuit in a typical home.

Therefore, in order to obtain hot water at a constant temperature when maximizing the use of hot water from the hot water supply circuit, it is necessary to install a boiler with a capacity that corresponds to the maximum amount of heat required for this hot water supply circuit. Increasing the size of the boiler will not only lead to a significant increase in cost, but also lead to problems such as securing a space for installation and increasing noise due to the larger boiler.

The present invention was developed based on the above-mentioned circumstances, and its purpose is to create a boiler with a capacity that corresponds to the amount of heat required by the heating circuit, such as when a large amount of hot water is continuously used in the hot water supply circuit. To provide a hot water supply and heating device capable of supplying hot water at a constant temperature without increasing the size of a boiler according to the maximum required amount of heat.

An embodiment of the present invention will be described below with reference to the drawings.

In the figure, 1 is the boiler. This boiler 1 includes a hot water supply circuit 3 that forms a closed flow path through a heat exchange pipe 2 provided inside the boiler 1, and a heating circuit 4 that forms a closed flow path through the internal space of the boiler 1. The boiler 1 is capable of generating the amount of heat required by the heating circuit 4.

The outgoing pipe 3a of the hot water supply circuit 3 is provided with a first circulation pump 5 and connected to a plurality of supply pipes 7 having faucets 6 at their tips, one of which is connected to the outgoing pipe 3a. The book is adapted to supply hot water to the bathtub 8.

A heat exchanger 9 is provided in the middle of the supply pipe 7 that supplies hot water to the bathtub 8, and a proportional control type two-way valve 10 is provided on the outlet side of the heat exchanger 9.

In addition, a second circulation pump 1 is connected to the outgoing pipe 4a of the heating circuit 4.
1, and a first proportional control type three-way valve 12 is provided on the discharge side of the pump 11.

Furthermore, in the heating circuit 4, the inflow side is connected to the outgoing pipe 4a, the outflow side is connected to the return pipe 4b, and a plurality of radiators 13,
... is provided, and the return pipe 4b
A second proportional control type three-way valve 14 is provided.

Further, a heating circuit 15 is provided, with one end connected to a heat exchanger 9 provided in the supply pipe 7 of the hot water supply circuit 3 and the other end connected to the heating circuit 4.

That is, this heating circuit 15 has an incoming pipe 15a, one end of which is connected to a heat exchange pipe 9a built in the heat exchanger 9.
The other end is connected to the branch port 12a of the first proportional control type three-way valve 12.

Further, the return pipe 15b of the heating circuit 15 has one end connected to the outlet side of the heat exchange pipe 9a of the heat exchanger 9, and the other end connected to the branch port 14a of the second proportional control type three-way valve 14. It becomes.

Then, the two-way valve 10° first. Second three-way valve 12,1
4 is controlled to open and close by a signal from a temperature detector 16 that detects the temperature of hot water supplied from the hot water supply circuit 3 provided in the heat exchanger 9 to the bathtub 8 via the supply pipe 7. .

Furthermore, 17 in the figure is a water conduit pipe that supplies tap water to the hot water supply circuit 3.

Next, the operation of the above configuration will be explained.

First, in normal hot water supply and heating operation, that is, when a large amount of hot water is not continuously used in the hot water supply circuit 3, the first
．． By the operation of the second circulation pumps 5 and 11, hot water is circulated through the hot water supply circuit 3 and the heating circuit 4 as shown by solid line arrows in the figure, and the hot water in the heating circuit 4 is heated to, for example, 45°C by the boiler 1. The hot water in the hot water supply circuit 3, which is heated by exchanging heat with this hot water, is also heated to about 45°C.

The friend is the faucet 6 of the supply pipe 7 installed in the hot water supply circuit 3.
By opening it, you can get hot water of about 45°C.

During such normal operation, the temperature of the hot water in the heat exchanger 9 provided in the supply pipe 7 that supplies hot water to the bathtub 8 is also approximately equal to the temperature of the hot water in the hot water supply circuit 3. No signal is output from the temperature sensor 26,
The proportional control type two-way valve 10 opens, and the first and second proportional control type three-way valves 12, 14 open these branch ports 1-123,
14a is in a closed state.

Next, when a large amount of hot water is continuously used, such as by supplying hot water from the hot water supply circuit 3 to the bathtub 8, while hot water heated to a predetermined temperature remains in the hot water supply circuit 3, hot water at a predetermined temperature is supplied from the supply pipe 7. can get.

However, since the capacity of the boiler 1 corresponds to the amount of heat required by the heating circuit 4, as a large amount of low-temperature water flows into the hot water supply circuit 3 from the water pipe 17, the amount of heat required for the hot water supply circuit 3 increases The temperature of the hot water supplied to the bathtub 8 gradually decreases.

Then, the temperature detector 16 provided in the heat exchanger 9 detects the temperature of the hot water, and the two-way valve 10 and the first... second 3
A signal is output to the direction valves 12 and 14.

That is, the two-way valve 10 closes at a degree proportional to the detected temperature to throttle the amount of hot water supplied to the bathtub 8. second three-way valve 12,
14 indicates these branch ports with an opening proportional to the detection signal.
Open 2a and 14a.

Therefore, a portion of the high-temperature hot water flowing into the heating circuit 4 flows through the first proportional control type three-way valve 1 as shown by the chain arrow in the figure.
2 branch port N2a to the outgoing pipe 15 a of the heating circuit 15
The hot water flows into the heat exchange pipe 9a of the heat exchanger 9 and heats the hot water stored in the internal space of the heat exchanger 9.

Thereafter, it flows from the return pipe 15b of the heating circuit 15 to the return pipe 4b of the heating circuit 4 via the branch port 14a of the second proportional control type three-way valve 14.

Therefore, the amount of hot water used in the hot water supply circuit 3 increases,
Even if the required amount of heat in the hot water supply circuit 3 becomes larger than the capacity of the boiler 1, the hot water discharged from the supply pipe 7 of the hot water supply circuit 3 is heated by the hot water in the heating circuit 4, so that the hot water at a predetermined temperature is supplied to the bathtub 8. can be supplied.

As described above, the present invention provides a heat exchanger in the supply pipe connected to the hot water supply circuit, and supplies hot water from the heating circuit to the heat exchanger according to the temperature of the hot water discharged from the supply pipe. Since we have installed a heating circuit that heats the hot water discharged from the pipes, even if the amount of heat required by the hot water supply circuit exceeds the capacity of the boiler, such as when supplying a large amount of hot water to a bathtub, it will still be discharged from the supply pipes. Since the hot water is heated by the hot water in the heating circuit, the temperature of the hot water discharged from the supply pipe does not drop.

In other words, hot water at a predetermined temperature can be obtained from the hot water circuit even if the boiler capacity is lower than the maximum amount of heat required by the hot water circuit, so making the boiler smaller can significantly reduce costs. be effective.

[Brief explanation of drawings]

The drawing is a piping diagram showing one embodiment of the present invention. 1...boiler, 3...hot water circuit, 4
... Heating circuit, 7 ... Supply pipe, 9 ...
... Heat exchanger, 15 ... Heating circuit.

Claims (1)

[Scope of utility model registration request] A boiler equipped with a heat exchange pipe, a heating circuit connected to the boiler, a hot water circuit connected to the heat exchange pipe of the boiler, and a supply pipe connected to the hot water circuit and supplying hot water from the hot water circuit to appropriate locations. , a heat exchanger provided in this supply pipe, a heating circuit branched from the heating circuit and connected to the heat exchanger, and a heating circuit that detects the temperature of hot water discharged from the supply pipe and uses the detection signal to control the heating circuit. 1. A hot water supply and heating device comprising: a temperature detector for controlling the amount of hot water in a heating circuit that flows to a heat exchanger via a temperature detector.