JPH0120585Y2 - - Google Patents

Description

[Detailed description of the invention] <Industrial field of application> This invention relates to a control circuit for a heater used at home.

<Conventional technology> Conventionally, hot water is produced by reusing the exhaust gas or exhaust heat of a stove that emits radiant heat and hot air through combustion, and the hot water is introduced into a radiator via a circulation pump to provide hot water heating. Heaters that also do this are known.

However, since this system performs stove heating using radiation or hot air and hot water heating at the same time, the range of temperature control is small and it is difficult to control the temperature.In the end, the only way to control the temperature was by adjusting the thermal power, which was inconvenient.

Therefore, in order to eliminate this inconvenience, in recent years Jikosho has
As seen in Japanese Patent No. 58-52450, a system was proposed in which stove-only operation and hot water heating operation could be selected by switching the exhaust system path.

<Problems to be solved by the invention> However, even with this device, when switching from stove-only operation to hot water heating operation, water enters the hot water heating heat exchanger by the circulation pump, but at this time, a large amount of water is generated. It makes a boiling sound, gives a sense of danger, and may even damage the heat exchanger for heating hot water.

The cause of this is that even if the exhaust system path is closed to prevent exhaust gas from flowing into the hot water heating heat exchanger side, the hot water heating heat exchanger will overheat due to heat conduction and radiant heat over a long period of time. This is because water is heated to a high temperature and low temperature water flows into it.

<Means for solving the problem> The exhaust gas or exhaust heat from the burner is transferred to the stove heat exchanger through which the exhaust gas or exhaust heat is distributed between the heat exchange room side equipped with the hot water heating heat exchanger and the exhaust path side. In a heater that is equipped with a switching device that switches between hot water heating and independent stove heating, when either one of the hot water heating operation switch and the stove independent operation switch is turned on in conjunction with the switching operation of the switching device, the other switch is turned on. Further, the stove independent operation switch is connected in parallel with a first heat sensitive device that opens when it detects a temperature higher than the set temperature of the hot water heating heat exchanger, and the stove independent operation switch and the first heat sensitive device are connected in parallel. An electromagnetic pump, an ignition device, a combustion blower, and a circulation pump are connected in series with the device and in parallel with each other, and a second heat-sensitive device having the same function as the first heat-sensitive device is connected in series with the circulation pump. This relates to a control device for a heater.

<Function> In order to perform stove heating, when the well-known combustion operation switching device 9 is placed on the stove heating side, the stove independent operation switch 30 is also closed, while the hot water heating operation switch 31 is opened.

At this time, due to the low temperature, the first heat sensitive body 32 and the second heat sensitive body 3
2' is also closed and the well-known combustion begins.

As a result, the exhaust gas or exhaust heat is discharged from the stove heat exchanger 3 → the combustion-only exhaust port 5 → the exhaust path 14 → the exhaust device 15, and therefore the entire stove heat exchanger 3 is exhausted by the exhaust gas or exhaust heat. Once sufficiently heated, the stove will operate independently by emitting radiant heat or warm air to the surrounding area.

By operating the stove alone, the surrounding hot water heating heat exchanger 17 etc. are heated by the heat conduction and radiant heat, but the stored water or hot water is not circulated, so the temperature is locally raised. Therefore, the first heat sensitive body 32 and the second heat sensitive body 32' detect this and open, but since the stove 30 for independent stove operation is closed, the stove continues to operate independently.

During the stove alone operation, when performing hot water heating operation, the switching device 9 is operated to open the stove alone operation switch 30 and close the hot water heating operation switch 31.

However, when high temperature is detected, the first heat sensitive body 32 and the second
Since the heat sensitive body 32' is open, the circulation pump 19 is not started immediately, and once the heat is extinguished or goes in the direction of extinguishing, the temperature of the hot water heating heat exchanger 17 decreases, and this is transferred to the first heat sensitive body 32 and the second heat sensitive body. 32' detects this and closes, so that re-combustion or large-fire combustion is started, and the circulation pump 19 is also operated, so that the hot water heated and heated by the hot water heating heat exchanger 17 is continuously heated. The hot water is circulated to the radiator 20 and hot water heating operation is performed.

<Embodiment> Reference numeral 1 denotes a pot-type burner, etc., and is located below a combustion chamber 2 made of a heat-resistant transparent material.

3 is a box-shaped heat exchanger for a stove that emits radiant heat and hot air to the surrounding area, and its almost center is penetrated by a cylindrical exhaust guide tube 4 that communicates with the combustion chamber 2, and is also an outlet for exhaust gas. A combustion-only exhaust port 5 and a hot water exhaust port 6, which are exhaust system paths, are opened in parallel to one side wall surface.

Reference numeral 7 designates a partition plate that connects the exhaust guide tube 4 to the top and bottom of the stove heat exchanger 3, and connects the exhaust port 5 exclusively for combustion.
and extend to the inner wall surface on the side where the hot water exhaust port 6 is installed,
In addition, the combustion exclusive exhaust port 5 and the hot water exhaust port 6 are separated.

Further, an exhaust port 8 is opened in the exhaust guide tube 4 to communicate the combustion chamber 2 and the stove heat exchanger 3, and the opening position of the exhaust port 8 is opened toward the hot water exhaust port 6 side.

Reference numeral 9 denotes a switching device provided in the stove heat exchanger 3 to open and close the combustion exhaust port 5 and the hot water exhaust port 6 when one is open and the other is closed. Two closing plates 11, 1 that differ by 90 degrees
2 is fixed, and each closing plate 11, 12 is located in front of the combustion exclusive exhaust port 5 and hot water exhaust port 6, respectively, and furthermore, an operating knob 13 for operating from the outside is rotatable at the tip of the operating rod 10. establish.

14 is an exhaust device 15 that communicates with the exhaust port 6 exclusively for combustion.
Exhaust duct that discharges exhaust gas.

16 is a heat exchange chamber communicating with the hot water exhaust port 6;
A heat exchanger 17 for heating hot water is sealed inside and communicated with the exhaust passage 14.

Reference numeral 18 denotes a cistern tank for storing water or hot water, the upper part of which communicates with a heat exchanger 17 for heating hot water, and the lower part of which communicates with a circulation pot type 19.

The other end of the hot water heating heat exchanger 17 and the circulation pump 19 communicate with a radiator 20 such as floor heating, and hot water is circulated to the radiator 20 to heat a remote location with hot water.

21 is a reflector that reflects heat, 22 is an outer frame surrounding the entire body, 23 is a combustion blower, and 24 is a fuel regulator.

Next, to explain the electric circuit, the electromagnetic pump 26, the ignition device 27, the combustion blower 23, and the circulation pump 19 are connected in series with the power switch 25 and in parallel with each other.
and a relay 28 to form a main circuit E, and a delay circuit in which a power switch 25 is connected in parallel and a delay thermostat 29 is connected in series with the relay 28.

The normally open contact 28' of the relay 28 is connected in series between the circulation pump 19 and the relay 28, and the first
The normally closed contact 28'' is connected in series with the circulation pump 19 and the combustion blower 23, and the second normally closed connection 28 is connected in series with the ignition device 27.

The switching device 9 also includes a stove independent operation switch 3 that opens and closes in conjunction with the switching operation of the switching device 9.
0 and a hot water heating operation switch 31, the stove independent operation switch 30 is located near the power switch 25 and is connected in series with the power switch 25,
Furthermore, the electromagnetic pump 26 and the circulation pump 19 are also connected in series, while the hot water heating operation switch 31 is connected in series with the circulation pump 19.

Alternatively, the relationship between the stove independent operation switch 30 and the hot water heating operation switch 31 is such that when one is turned on, the other is turned off.

In addition, 30 and 32' are temperature heating heat exchangers 17 that open when the temperature exceeds a set temperature to prevent dry firing.
The first heat sensitive device 32 is a first heat sensitive device and a second heat sensitive device that detect temperature of itself or hot water at the same location with two devices.
is connected in series with the power switch 25 in terms of an electric circuit, and in parallel with the stove independent operation switch 30,
Further, the second heat sensitive device 32' is connected in series with the circulation pump 19 and the hot water heating operation switch 31.

When switching from stove-only operation to hot water heating operation, the temperature of the heat exchanger for hot water heating is lowered before the water or hot water is circulated, which may cause a loud boiling noise, giving a sense of danger, or causing hot water heating. damage to the heat exchanger is prevented.

<Effect of the invention> The exhaust gas or exhaust heat from the burner is transferred to the stove heat exchanger 3 through which the exhaust gas or exhaust heat is distributed between the heat exchange chamber 16 side equipped with the hot water heating heat exchanger 17 and the exhaust path 14 side. In a heater that is provided with a switching device 9 that switches between hot water heating and stove-only heating, either the hot water heating operation switch 31 or the stove independent operation switch 30 is switched in conjunction with the switching operation of the switching device 9. Switch 3 is provided so that when one is turned on, the other is turned off.
0 is connected in parallel with the first heat sensitive device 32 which opens when detecting a temperature higher than the set temperature of the heat exchanger 17 for heating hot water, and is further connected in series with the stove independent operation switch 30 and the first heat sensitive device 32 and in parallel with each other. The electromagnetic pump 26, the ignition device 27, the combustion blower 23, and the circulation pump 19 are connected, and the first heat-sensitive device 3
Since the second heat sensitive device 32', which has the same effect as 2, is connected in series to the circulation pump 19, when switching from stove-only operation to hot water heating operation, the temperature of the hot water heating heat exchanger is first lowered and then the temperature of the hot water heating heat exchanger is lowered. Since the water or hot water is circulated, it is possible to prevent the occurrence of loud boiling noise, which may create a sense of danger, and also prevent damage to the heat exchanger for heating hot water.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of this invention, FIG. 2 is a cross-sectional view thereof, FIG. 3 is an electric circuit diagram thereof, and FIG. 4 is a diagram of the relationship between the switching device and each switch. 9...Switching device, 30...Switch for stove independent operation, 30...Switch for hot water heating operation, 3
2...first heat sensitive device, 32'...second heat sensitive device.

Claims (1)

[Scope of utility model registration request] A switching device 9 that switches the exhaust gas or exhaust heat from the burner to the heat exchanger 3 for the stove through which the exhaust gas or exhaust heat flows between the heat exchange chamber 16 side equipped with the hot water heating heat exchanger 17 and the exhaust path 14 side. In a heater that performs hot water heating and independent stove heating, when one of the hot water heating operation switch 31 and the stove independent operation switch 30 is turned on in conjunction with the switching operation of the switching device 9, the other is turned on. In addition, a switch 3 is installed to turn off the stove.
0 is connected in parallel with the first heat sensitive device 32 that opens when detecting a temperature higher than the set temperature of the hot water heating heat exchanger 17, and is further connected in series with the stove independent operation switch 30 and the first heat sensitive device 32 and in parallel with each other. The electromagnetic pump 26, the ignition device 27, the combustion blower 23, and the circulation pump 19 are connected, and the first heat-sensitive device 3
2. A control device for a heater, characterized in that a second heat-sensitive device 32' having the same function as that of the second heat-sensitive device 32' is connected in series to a circulation pump 19.