JPS5920937B2 - hot water heating equipment - Google Patents

Description

[Detailed description of the invention] The present invention relates to a hot water heating device.

This type of device has a hot water circulation path piped between the external hot water device and the indoor radiator, but the warm air blowing fan built into the radiator is started and stopped by the indoor room thermostat. That's how it is.

Even when this fan stops, hot water continues to circulate in the hot water circulation path, resulting in a large amount of heat radiation loss from this piping.

In order to reduce this heat radiation loss, the present invention opens and closes the hot water circulation path depending on the room temperature, and stops the flooding circulation when the room temperature rises above a set value.

Furthermore, even if the hot water circulation is stopped, high-temperature hot water remains in the heat exchanger inside the vessel and some piping, and this is also added to the heat radiation loss as a natural number heat component.

In order to release the heat of the residual hot water into the room without waste, the present invention starts and stops the fan at the hot water temperature.
Even after the circulation is stopped, the fan continues to operate as long as the hot water temperature is higher than a predetermined value.

Furthermore, the present invention aims to improve the indoor temperature distribution by extending the indoor air circulation operation by continuously operating the fan.

Hereinafter, the embodiment will be explained with reference to the figures. 1 is a radiator installed indoors, and a heat exchanger 2 is installed in the indoor air ventilation path.
and a motor-driven warm air blowing fan 3 are arranged in this order,
A hot water switch 4 for detecting hot water temperature is attached to the hot water inlet side of the heat exchanger 2, and an electric on-off valve 5 is connected to the hot water outlet of the heat exchanger 2.

The radiator 1 also includes a power switch 6, a high/low speed selector switch 1 for the fan 3, and a room thermoswitch 8 that can set and detect the room temperature.

Reference numeral 9 denotes a hot water device installed outside, which is equipped with a gas burner 10, a heating water chamber 11, and an electric pump 12 in its insulated interior, and the hot water in the water chamber 11 is sent out by the pump 12.

Reference numeral 13 denotes a hot water circulation path in which the heated water chamber 11 and the heat exchanger 2 are connected via piping, and the outlet of the pump 12 is connected to the inlet of the heat exchanger 2, and the outlet of the heat exchanger 2 is connected to the water chamber 11 with an on-off valve 5. They are connected to each other via.

Reference numeral 14 denotes a bypass path for the heat exchanger 2, which connects the outlet of the pump 12 and the water chamber 11 in the hot water device 9, and is connected to the bypass valve 15 which operates in reverse to the opening/closing valve 5. There is.

Next, the electric circuit of the present invention will be explained.

The radiator 1 draws in a power supply 16, and connects the power supply 16 with a series line of the hot water switch 4 - high/low speed changeover switch 1 - fan 3 and the room thermoswitch 8 - on-off valve 5 through the power switch 6. The series line is connected in parallel.

The power supply 16 is connected to an external water heater 9 via a power switch 6.
The pump 12 is connected to the ignition combustion device 17 of the gas burner 10, which is controlled by the temperature of hot water in the water chamber 11, and is remotely controlled by the power switch 6 of the radiator 1.

The room thermo switch 8 is of the switching type, with an on-off valve 5 at one contact and an electric bypass valve 1 at the other contact.
5 may be connected to each other.

To explain the operation, first, let's say that the indoor temperature is 14℃.
To heat the room at a low temperature of about 20°C, set the room thermo switch 8 to 20°C and close the power switch 16.

When the hot water temperature in the water chamber 11 is low, the gas burner 10 ignites and burns to raise the hot water temperature, but when the temperature is low, the hot water switch 4 is open and the fan 3 is stopped.

The on-off valve 5 is opened when the room thermo switch 8 is closed, and hot water is circulated in the hot water circulation path 13 by the pump 12 (see time T1 in FIG. 4).

When the hot water temperature reaches, for example, about 45° C., the hot water switch 4 is closed, the fan 3 is operated at either high or low speed, and hot air is blown into the room.

The speed of the fan 3 can be changed manually.

During this time, the hot water temperature is maintained at about 75° C. in the water chamber 11 (see T2 time in FIG. 4).

When the room temperature rises to 20°C, the room thermoswitch 8 is opened or switched, the on-off valve 5 is closed, and the bypass valve 15 is opened.

The hot water remaining in the heat exchanger 2 and the piping exchanges heat with indoor air by the continuously operating fan 3, and its temperature is lowered.

During this time, hot air is blown into the room, and indoor air is circulated, thereby continuously making the temperature distribution in the room uniform (see time T3 in FIG. 4).

When the temperature of the residual hot water in the heat exchanger 2 decreases to an opening temperature lower than 45° C. of the hot water switch 4, the hot water switch 4 opens and the fan 3 stops.

During this time, both the room temperature and the hot water temperature gradually decrease due to heat radiation (see 14 hours in FIG. 4).

When the room temperature reaches a closing temperature lower than 20°C, the room thermo switch 8 is closed or switched again, the on-off valve 5 is opened, the bypass valve 15 is closed, and the hot water circulating in the bypass path 14 is closed. is circulated in the hot water circulation path 13 (1 in Figure 4).
5 hours).

When this muddy water goes around, the heat exchanger 2 has a water chamber 1.
1, the hot water switch 4 is quickly closed, the fan 3 is turned on, and the following hot air heating is resumed (see time T6 in Figure 4).

That is, after 17 hours in Figure 4, T3 time → T4 time → T
Repeat the same operation in order from 5 hours to T6 hours.

Although the present embodiment has been described using one heatsink 2, the same effect can be applied even if a plurality of heatsinks are used.

In addition, although the fan 3 is collectively controlled according to the opening and closing of the hot water switch 4, that is, according to the hot water temperature, this fan 3 is a well-known means to prevent cold air from blowing at the time of startup and to continue operating for a certain period of time after reaching the set room temperature. It is sufficient if the control is performed using a delay means.

As described above, in the hot water heating device according to the present invention, the hot water circulation path is provided with an on-off valve that opens and closes depending on the room temperature, and this on-off valve is closed when the room temperature is above the set value, so the hot water circulation is stopped when the room temperature is set. It is possible to reduce heat radiation loss in piping with the outside.

Particularly when the room receives sufficient solar radiation, there is considerable heat radiation loss in the circulation path, but in the present invention, such loss is extremely small.

Furthermore, by controlling the fan at the hot water temperature, the operation stop time can be substantially extended, and during this continued operation, residual hot water heat from the heat exchanger or the like can be recovered indoors.

Furthermore, this continuous operation allows indoor air to be circulated for a long time, thereby improving the indoor temperature distribution.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the mechanism of the hot water heating device according to the present invention;
The figure is a front view of the radiator, FIG. 3 is an electric circuit diagram, and FIG. 4 is a time characteristic diagram of room temperature. 1... Heat radiator, 2... Heat exchanger, 3... Fan,
4... Hot water switch, 5... Opening/closing valve, 8... Room thermo switch, 9... Hot water device, 12... Pump, 13... Hot water circulation path.

Claims (1)

[Claims] 1 Consists of an indoor radiator with a heat exchanger and a fan for blowing hot air, and an external hot water device that piping constitutes a hot water circulation path including the heat exchanger, which opens and closes according to the indoor temperature. In addition to providing an on-off valve, this on-off valve is closed when the room temperature rises above a set value, and the above-mentioned fan starts and stops according to the hot water temperature regardless of whether the on-off valve is opened or closed, and even after hot water circulation has stopped. A hot water heating system that is characterized by continuous operation.