JPS6035001Y2 - Warm air heater operation control device - Google Patents

Description

[Detailed description of the invention] This invention is equipped with an operation control device for a warm air heater, specifically a fuel adjustment device that adjusts the amount of fuel supplied to the combustor in the hot air heater, and can adjust the air volume of the indoor circulation fan. The present invention relates to an operation control device for a warm air heater.

Conventionally, with this type of operation control device, when the indoor temperature rises due to operation and reaches the set temperature, the fuel supply amount is always reduced regardless of the set temperature value, reducing the amount of heat generated, and the indoor temperature rises above the set temperature. The air volume of the indoor circulation fan is reduced in accordance with the reduced amount of heat generation, so that the air does not give a cold draft feeling to the occupants.

When a place reduces the air volume of the indoor circulation fan, the distance the hot air reaches becomes shorter, so the indoor temperature is high only in the area where the hot air reaches, and the indoor temperature is lower outside the area where the hot air reaches. Therefore, it was inevitable that the temperature of the indoor air would be uneven.

This invention was devised in view of the above problems, and focuses on the fact that when the set temperature is set high and the indoor temperature is high, cold draft does not occur even if the air volume is not reduced after the room temperature reaches the set temperature. , a reference temperature is set to determine whether or not to give a cold draft feeling to the occupants, and when the indoor temperature rises above the set temperature due to operation, the fuel supply amount is reduced (including zero) and the set indoor temperature is When the temperature is lower than the standard temperature, the air volume of the indoor circulation fan is reduced (including zero) to prevent residents from feeling a cold draft.
In addition, under conditions where the indoor temperature setting is higher than the reference temperature and the air volume of the indoor circulation fan does not give a feeling of cold draft to the occupants, the air volume is not reduced and the air flow from the fan is reduced. The aim was to prevent uneven temperature of the indoor air from occurring without reducing the reach of the air.

That is, the present invention is an operation control device for a hot air heater that is equipped with a fuel adjustment device that adjusts the amount of fuel supplied to the combustor in the hot air heater, and that is capable of adjusting the air volume of the indoor circulation fan.
An indoor temperature detector that detects the indoor temperature, a room temperature setting device that sets the indoor temperature to a predetermined temperature, and a reference temperature setting device that sets a reference temperature for determining whether or not to give a cold draft feeling. When the indoor temperature becomes higher than the set temperature by comparing it with the set temperature set by the room temperature setting device, the fuel adjustment device is operated to reduce the fuel supply amount and to set the set temperature and the reference temperature. In comparison, when the reference temperature is higher than the set temperature, the air volume of the indoor circulation fan is reduced after the operation of the fuel adjustment device, and when the reference temperature is lower than the set temperature, the air volume of the indoor circulation fan is reduced even after the operation of the fuel adjustment device. The feature is that the air volume of the indoor circulation fan is not reduced.

Hereinafter, an embodiment in which the operation control device of the present invention is applied to a combustion type hot air heater shown in FIG. 2 will be described based on the drawings.

First, to explain the heater shown in Fig. 2, 1 is a fuel tank for kerosene, 2 is an oil level regulator, 3 is a pot-type combustor with a fuel tray 4 at the bottom, and 5 is a motor (MF2).
), which is equipped with a main solenoid valve SV and a pilot solenoid valve SV2, which lead out a main fuel passage 6 and an auxiliary fuel passage 7 from the oil amount regulator 2 in parallel to form a fuel adjustment device A. At the same time, both of these passages 6 and 7 are connected to one
The fuel supply pipe 8 joins the main fuel supply pipe 8 and opens onto the receiving tray 4 of the combustion pipe 3, and an ignition heater 9 is disposed near this opening via an ignition transformer T. .

10 is a heat exchanger. The combustor 3 is provided with an exhaust port at the top and an air supply port at the bottom. The exhaust fan 11 and the air supply fan 12 communicate with the air supply and exhaust pipe 13, respectively.

Reference numeral 14 denotes an indoor circulation fan driven by the motor MF1, and the fan 14 can be switched between strong wind and weak wind operation by switching the speed taps H and L of the motor W.

During heating, this heater supplies the fuel in the fuel tank 1 to the saucer 4 via the supply pipe 8, and also operates the combustion fan 5 to supply and exhaust air to the combustor 3. The heater 9 is energized to ignite the fuel supplied to the saucer 4, and the fuel is combusted to generate the indoor circulation fan 14.
This allows warm air to be blown into the room for heating.

The device of the present invention controls the operation of the heater configured as described above, and basically includes an indoor temperature detector 15 that detects the indoor temperature Tb, and a room temperature setting that sets the indoor temperature to the set temperature Ta. a reference temperature setting device 17 for setting a reference temperature TC for determining whether or not to give a cold draft feeling.
The indoor temperature 7b is compared with the indoor set temperature Ta, and when the indoor temperature Tb becomes higher than the set temperature Ta, the fuel adjustment device A is operated to reduce the fuel supply amount and the set temperature is increased. When the reference temperature [C is higher than the set temperature Ta by comparing Ta and the reference temperature Tc, the air volume of the indoor circulation fan 14 is decreased, and when the reference temperature fT'C is lower than the set temperature Ta, the air volume of the indoor circulation fan 14 is reduced. The air volume of No. 14 is not reduced.

That is, of FIGS. 1a and 1b, the one shown in FIG. SV2, fan motor MF1 electric circuit 1o
An operating switch SW is interposed in the line 11 of the AC power source e of the ov, and a series line between the normally open terminal MR1-a of the first relay MR1 and the main solenoid valve SV1 and the pilot is connected between the power line 1□912. The connection lines of the solenoid valve SV2 are connected in parallel, and the normal terminal MR2-c of the second relay MR is connected to the line 11, and the normal terminal MR2-3 is connected to the line 11.

Connect the normally closed terminals MR2-1) to the high-speed and low-speed taps H and L of the fan motor MF1, respectively, and
The other terminal of F is connected to the line 1° via a temperature regulator n which is activated by detecting the temperature of the combustor 3.

In the case shown in FIG. 1a, a transformer and a rectifier (not shown) are connected to the AC power supply e to form a DC 12V power supply line Vcc, E, and these lines Vcc,
The indoor temperature detector 15, the room temperature setting device 16, and the reference temperature setting device 17 are connected in parallel between , and a series circuit of the second switch circuit 19 are connected in parallel.

Further, the output parts of the indoor temperature detector 15 and the room temperature setting device 16 are connected to the input part of the first comparator 20, and the output part is connected to the first comparator 20.
It is connected to the input signal section of the switch circuit 18, and the output section of the room temperature setter 16 and reference temperature setter 17 is connected to the second
It is connected to the input part of the comparator 21, and its output part is connected to the input signal of the second switch circuit 19.

Further, each input signal of the first and second switch circuits 18 and 19 is connected to the first and second comparators 2 on the connection line.
A diode D□ that allows current to flow only in the direction from circuit 19 to circuit 18 is interposed between the connection points of the 0.21 output section.

The indoor temperature detector 15 has a thermistor Rt arranged on the indoor air suction side of the warm air heater, and is connected to the line Vcc.

Connect the resistance C and the thermistor R1 in series between E and
The connection line between the resistor R□ and thermistor Rt is connected to the first comparator 2.
0, and the t1th electric signal 51=VCCxR1+Rt is inputted to the negative input section.

Incidentally, as the indoor temperature Tb rises, the thermistor Rt
The resistance value of , and thus the signal S0 becomes smaller.

Further, the room temperature setting device 16 has a variable resistor B2 and a fixed resistor B3 connected in series between the lines Vcc and E, and both resistors R2 and R.
3 is connected to the positive inputs of the first and second comparators 20 and 21, and a second electric signal 52=Vccx is applied to the positive inputs.
-'- is input as R2+R3, and the smaller the variable resistor R2, the lower the value of the set temperature Ta.

Further, the reference temperature setting device 17 has a variable resistor R4 and a fixed resistor R5 connected in series between the lines Vcc and E.
41R5 is connected to the negative input section of the second comparator 20, and the third electrical signal S35 = Vccx is inputted to the negative input section.
+R5 The smaller the variable resistor R4 is, the lower the value of the reference temperature Tc becomes.

And the first one above. The second comparator 20.21 outputs an H signal when the value of the electrical signal to the positive input section is greater than the value of the electrical signal to the negative input section, and outputs a small signal.

That is, the first comparator 20 outputs a signal when the room temperature Tb is lower than the set temperature Ta of the room temperature, and outputs an H signal when it is higher.

Further, the second comparator 21 outputs a signal when the reference temperature 7c is lower than the set temperature Ta of the room temperature, and outputs an H signal when it is higher.

Further, the first switch circuit 18 is a PNP type transistor T.
The emitter of r l is connected to the line Vcc, the collector is connected to the relay □, and the base is connected to the resistor R6.
It is connected to the line Vcc through the resistor B7 and to the output section of the first comparator 20 through the resistor B7, and is turned on when the output from the output section is L and turned off when it is H.

That is, when the indoor temperature Tb becomes higher than the set temperature Ta, the first comparator 20 outputs an H signal, so the first switch circuit 18 turns off, de-energizes the first relay MR1, and closes the main solenoid valve Sv1. It operates to reduce the amount of fuel supplied.

Further, the second switch circuit 19 is a PNP type transistor T.
The emitter of r2 is connected to the line Vcc, the collector is connected to the relay MR2, and the base is connected to the resistor R6.
It is connected to the line Vcc via the resistor C, to the output of the second comparator 21 via the resistor C, and further to the output of the first comparator 20 via the diode D0.

The second switch circuit 19 is configured such that when the indoor temperature is lower than the set temperature Ta and the output of the first comparator 20 is L, that is, when the fuel supply amount is not reduced, the output of the second comparator 21 is H. , L is turned on regardless of the second relay M.
R2 is energized and the terminals MR2-(:, MR2-a are connected to each other to operate the motor MF1 at high speed, and the fan 14 blows out a strong wind.

In addition, when the indoor temperature Tb becomes higher than the set temperature 7a and the output of the first comparator 20 becomes H, the second switch circuit 19 switches the second comparator 21 to the second switch circuit 19, when the reference temperature Tc is higher than the set temperature Ta.
When the output of When the reference temperature Tc is lower than the set temperature Ta and the output of the second comparator 21 is L, it is turned on and the fan 14 blows out a strong wind.

Note that R1 and R□1 are resistors for providing a differential differential for switching, and D2. D3 is a diode.

In the above configuration, when operation is performed with the set temperature Ta set lower than the reference temperature Tc, and when the indoor temperature Tb is lower than the set temperature Ta, the input signal is input to the positive and negative input sections of the first comparator 20. 2nd degree 1 electrical signal S2. Since the signal S1 is larger than the signal S□, the first comparator 20 is L.
The signal is output, the first switch circuit 18 is turned on, the relay MR1 is energized, the main solenoid valve S1 is opened, and both solenoid valves SV are opened.
1. Fuel is supplied to both from SV2.

Also, since the reference temperature Tc is higher than the set temperature Ta, the second and third electric signals S2.
The signal S3 is smaller than the signal S2, and the second comparator 21 outputs an H signal, but it is connected to the L of the output section of the first comparator 20 through the diode D1, and becomes L, and the second switch circuit 19 outputs an H signal. When turned on, the relay 1 is energized, the fan motor angler operates at high speed, and the air volume of the fan 14 becomes strong.

As a result, the indoor temperature 7b rises toward the set temperature Ta due to the high fuel consumption and strong wind conditions.

When the set temperature Ta is exceeded, the signal S2 becomes larger than the signal S□, and the first comparator 20 outputs an H signal.

Therefore, the first switch circuit 18 is turned off and the relay MR1
is demagnetized, the main solenoid valve SV1 is closed, and the fuel supply amount is reduced, and at the same time, the output section of the second comparator 21 is held in the H state, the second switch circuit 19 is turned off, and the relay is demagnetized and the fan The motor MF□ operates at low speed, and the air volume of the fan 14 becomes weak.

In other words, it is possible to create a low fuel and weak wind condition, thereby eliminating the feeling of cold draft for the occupants.

In addition, after the indoor temperature exceeds the set temperature Ta, it rises further,
If the temperature exceeds the reference temperature TC, the fan 1
Even if a situation arises in which the occupants do not feel a cold draft even if the switch is switched to strong wind operation, the outputs of comparators 20 and 21 both remain in the H state in Fig. 1a. , to maintain low fuel and weak wind conditions.

The reason for this is that setting the set temperature Ta lower than the reference temperature [C] indicates that the occupants desire low fuel consumption and low wind operation.

Although not actually shown in the drawings, for example, it is possible to provide an external switch so that the fan can be forcibly switched to strong wind operation to eliminate temperature irregularities in the indoor air. In this case, the reference temperature setting device 1
By changing the setting of variable resistor R1 of No. 7, the range of low fuel consumption and strong wind operation can be expanded.

Next, operation is performed with the set temperature Ta set higher than the reference temperature TC, and when the indoor temperature To is lower than the set temperature Ta, the signal S1 is larger than the signal S2 at the positive/negative input section of the first comparator 20. The signal S2゜S□ is input and the L signal is output, the first switch circuit 18 is turned on, the relay ■□ is energized, the main solenoid valve Sv1 is opened, and both the solenoid valves Sv1.
Fuel is supplied to both from Sv2.

Also, since it is lower than the reference temperature setter Ta, the second and third electric signals S2. In S3, the signal J is larger than the signal S2, and the second comparator 21 becomes L.
The signal is output, the second switch circuit 19 is turned on, the relay MR is energized, the fan motor MF'1 is operated at high speed, and the air volume of the fan 14 becomes strong.

As a result, the indoor temperature Frrb rises toward the set temperature ja due to a large amount of fuel and strong wind, and when the set temperature Ta is exceeded, the signal S2 becomes larger than the signal S□, and the first comparator 20 outputs an H signal. Output.

Therefore, the first switch circuit 18 is turned off and the relay MR1
is demagnetized, the main solenoid valve Sv1 closes, and the amount of fuel supplied decreases.

In addition, since the second comparator 21 outputs an L signal, the fan motor angle machine continues to operate at high speed, and the air volume of the fan 14 is maintained at a strong wind state, and the airflow distance is not reduced, so the air can be used indoors without the feeling of cold draft. This prevents uneven air temperature.

In the above explanation, two solenoid valves SV□ and SV2 are provided as the fuel adjustment device A, and the solenoid valve SV2 is always open during operation, and the opening and closing of the solenoid valve Sv□ is controlled to perform strong and weak automatic operation. Although the present invention has been applied to a single solenoid valve, it can also be applied to automatic on/off operation by simply controlling the opening and closing of a single solenoid valve, or a solenoid pump can be used to adjust the fuel without using a solenoid valve. It goes without saying that the present invention can be similarly applied to other systems that allow

As described above, according to the present invention, when the indoor temperature rises above the set temperature during operation, the amount of fuel supplied is reduced, and when the set indoor temperature is lower than the reference temperature, the air volume of the indoor circulation fan is reduced. This prevents the occupants from feeling a cold draft, and also prevents the air volume of the indoor circulation fan from decreasing when the indoor temperature setting is higher than the reference temperature, thereby reducing the distance the air reaches the fan. It is possible to prevent temperature fluctuations in the indoor air without causing a drop in temperature and giving occupants the feeling of a cold draft.

[Brief explanation of the drawing]

FIGS. 1a and 1b are electrical circuit diagrams showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram showing an embodiment applied to a combustion type hot air heater. A...Fuel adjustment device, 3...Combustor,
14...Indoor circulation fan, 15...Indoor temperature detector, 6...Room temperature setter, 17...Reference temperature setter.

Claims (1)

[Scope of utility model registration request] An operation control device for a warm air heater that is equipped with a fuel adjustment device that adjusts the amount of fuel supplied to the combustor in the warm air heater and that can adjust the air volume of an indoor circulation fan, and that detects the indoor temperature. A detector, a room temperature setting device for setting the indoor temperature to a predetermined temperature, and a reference temperature setting device for setting a reference temperature for determining whether or not to give a cold draft feeling, the room temperature and the setting set by the room temperature setting device. When the indoor temperature becomes higher than the set temperature by comparing the temperature, the fuel adjustment device is operated to reduce the fuel supply amount, and
When the set temperature and the reference temperature are compared, and the reference temperature is higher than the set temperature, the air volume of the indoor circulation fan is reduced after the operation of the fuel adjustment device, and when the reference temperature is lower than the set temperature, the An operation control device for a warm air heater, characterized in that the air volume of the indoor circulation fan is not reduced even after the fuel adjustment device is operated.