JPH02176319A - Control device of room heater - Google Patents

Abstract

PURPOSE:To make the width of variation of room temperature reducible by stopping a pump when the detected temperature of room temperature exceeds a first set value, swiftly connecting an electric current to a vaporization heater when the room temperature is lower than a second set value, operating the pump when the room temperature is lower than a third set value, and swiftly starting burning when the room temperature reaches the starting temperature of room heating. CONSTITUTION:The first comparison part 21 of a control device 20 outputs a halt signal to a pump control part 22 when the comparison of the temperature T detected by a thermistor 8 with the first set temperature TS1 shows the relation of T>TS1. Next, a third comparison part 23 previously stores the third set temperature TS3 that is lower than the temperature TS1 of the first set part, and outputs an operation signal to the pump control part 22 when the temperature detected by the thermistor 8 shows the relation of T>TS3. Also, a second comparison part 24 previously stores the second set temperature TS2 that is lower than the temperature TS1 and higher than the temperature TS3, and outputs a preheating start signal to a preheating part 25 when the temperature T detected by the thermistor 8 is in the relation of T<TS2. Next, the preheating part 25 connects an electric current to a heater 2 to heat a vaporizer 3, continues to connect an electric current until the temperature whereat vaporization is possible is detected, and maintains the vaporization temperature until the operation of a pump 1 is started.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a control device for a heater that vaporizes and burns liquid twist 1.

Conventional technology: As a room temperature control method for a heater that heats a room, the heating cut-off temperature T is set according to the temperature set by the user. , F and this [IJi The large heating temperature T is lower than the temperature T OF F. N, the room temperature 'r is detected with a thermistor, etc., and when the room temperature T rises from the start of heating and becomes 'I'>ToFF, heating is stopped and T<T. To restart the DIi chamber with N, the room temperature T is the two set temperatures T. Almost constant control between □ and TON! :Aiη is generally known.

However, in the case of a heater that burns kerosene, it may be necessary to vaporize the kerosene.An example of a kerosene fan heater will be described with reference to FIG. As shown in FIG. 4, fuel oil is supplied by a pump 1 to a vaporizer 3 preheated by a heater 2, mixed with air supplied by a burner motor 4, and combusted by a burner 5. The air is mixed with air from a blower fan motor 6 disposed behind the fan 5 and discharged into the room to heat the room. A control device 7 controls the combustion of these combustion devices, and a thermistor 8 detects the room temperature. Reference numeral 9 denotes a cut-off temperature comparing section of the control device 7, which compares the temperature T detected by the thermistor 8 with the cut-off temperature T. , and if 'I''> T OF F, the pump 1 is stopped. 10 is a large temperature comparison section of the control device 7, which compares the temperature T detected by the thermistor 8 with the large temperature ToN and determines whether T
<T. If N, a preheating signal is output to the preheating section 11. The preheating section 11 supplies electricity to the heater 2 of the vaporizer 3 to heat the vaporizer 3. 12 is a vaporizer thermistor attached to the outer wall of the vaporizer B3, which detects the temperature of the vaporizer 3. When the vaporizer thermistor 12 detects the vaporizable temperature, the control unit 'f! ,
The pump control unit 13 of 7 starts operation of the pump 1 and cuts off the power supply to the heater 2 by the preheating unit 11.

Problems to be Solved by the Invention However, in the above-mentioned heater, the temperature at which heating is to be started is preheated by energizing the room temperature at f'F from end to end.
Since the pump is operated to start combustion after reaching the vaporization temperature, as shown in Figure 5, the room temperature drops further during preheating before restarting combustion operation, resulting in large room temperature fluctuations. The problem was that it became

The present invention solves the above problems, and aims to provide a heater control device that can quickly start combustion when the room temperature does not reach the heating start temperature and reduce the fluctuation range of the room temperature. .

Means for Solving the Problems In order to solve the above problems, the heater control device of the present invention includes a vaporizer that vaporizes liquid fuel, a vaporization heater that heats the vaporizer, and a vaporizer that heats the vaporizer. In a heater control device that has a pump that delivers liquid fuel and controls a combustion device that burns liquid fuel according to a temperature detected by a detection means of a room temperature detection means, until the vaporizer reaches a temperature at which vaporization is possible. a preheating section that energizes the vaporization heater; a pump control section that controls operation of the pump; and a first section that outputs a stop signal to the pump control section when the temperature detected by the room temperature detection means is equal to or higher than a first set temperature. a second comparison section that outputs a preheating start signal to the preheating section at a temperature equal to or lower than a second set temperature lower than the first set temperature; This configuration includes a third comparison section that outputs an operation signal to the pump control section.

Effect With the above configuration, when the temperature detected by the room temperature detection means exceeds the first set temperature, the first comparison section stops the pump and enters the thermo-off state, and then the room temperature decreases and the temperature detected by the room temperature detection means reaches the second set temperature. When the temperature becomes lower than the set temperature, the second comparison section outputs a preheating start signal to the preheating section, the preheating section energizes the vaporization heater and stands by in a state where vaporization is possible, and the room temperature further decreases to the temperature detected by the room temperature detection means. When the temperature becomes lower than the third set temperature, the third comparison section outputs an operation signal to the pump control section, and the bomb control section operates the pump to perform combustion.

Therefore, when it is desired to start heating, the vaporizer is already preheated and combustion can be started immediately.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings.

Figure 1 shows an example of the kerosene fuel according to the present invention. 1 is a block diagram of an oil fan heater for heating.

In FIG. 1, parts having the same functions as those of the conventional fan heater shown in FIG. 4 are given the same symbols as appropriate. In FIG. A vaporizer 3 that vaporizes the fuel 1, a vaporizer heater 2 that heats the vaporizer 3, a burner 5 that burns a mixture of air and vaporized fuel supplied by a burner motor 4, and an outer wall of the vaporizer 3. Installed carburetor thermistor 12
and is provided. Fuel oil is supplied from the pump 1 to a vaporizer 3 preheated by a vaporization heater 2, mixed with air supplied by a burner motor 4, and combusted by a burner 5. The combustion exhaust gas is mixed with air from a blower fan motor 6 disposed behind the burner 5 and discharged into the room, heating the room. A thermistor 8 is a room temperature detection means for detecting room temperature. 20 is a control device for the fan heater, which controls combustion of the combustion device 13; 21 is a first comparison section provided in the control device 20, in which the temperature T detected by the thermistor 8 is determined to be the first set temperature tz'r; , , and when r>'rs, a stop signal is output to the pump control unit 22. Reference numeral 23 denotes a third comparison section, which compares the first set temperature 's
A third set temperature rp lower than l is stored in advance, and an operation signal is output to the pump control unit 22 when the temperature 'l' detected by the thermistor 8 is T (T, ,.Pump control The section 22 stops or operates the pump 1 according to the input stop signal and operation signal.24 is a second comparison section, which is lower than the first set temperature Tst;
higher than the set temperature Ts3, T at > T , 2 >
The second set temperature Ts2 of Tsi is stored in advance, and the temperature 1゛ detected by the thermistor 8 is T<
When T and □, a preheating start signal is output to the preheating section 25.

The preheating section 25 energizes the vaporization heater 2 to heat the vaporizer 3, and continues to energize the vaporization heater 2 until the vaporizer thermistor 12 detects that the vaporizer 3 has reached a temperature capable of vaporization.

After reaching the vaporization temperature, the pump control unit 22 turns on and off the vaporization heater 2 to maintain the vaporization temperature until the pump 1 starts operating. Even if the pump control unit 22 receives an operation signal from the third comparison unit 23, the pump control unit 22 may wait without operating the pump 1 until it receives from the vaporizer thermistor 12 that the vaporizer 3 has reached the vaporizing temperature. be.

FIG. 2 shows a flowchart of the main parts when the above control is realized by a microcomputer or the like, and numbers corresponding to those in FIG. 1 are given.

FIG. 3 shows the change in room temperature over time and the operating conditions of the pump 1 and the vaporization heater 2. With the above configuration, the third
Before the room temperature T becomes lower than the set temperature T ss, the room temperature T
When T becomes lower than the second set temperature Ts2, the second comparing section 24 outputs a preheating start signal to the preheating section 25 and the vaporizer 3 is heated in advance, so that as soon as T<T□, Combustion can be started and fluctuations in room temperature can be reduced. In addition, in FIG. 3, a is waiting by turning on and off the vaporization heater 2 in order to maintain the vaporizer 3 at a temperature that allows vaporization until the room temperature T falls and T<Ts. In addition, b indicates a state in which the pump 1 is waiting for operation until the vaporization temperature is reached.

The above explanation was given using an oil fan heater as an example.
A similar effect can be obtained in a heater that vaporizes and burns liquid fuel. This is especially effective when used in an air conditioner that installs a combustion device outdoors, attaches a heat exchanger indoors, and connects refrigerant piping both indoors and outdoors to transfer heat and heat the room because the vaporizer is easily cooled by the cold air from outside. is big.

Effects of the Invention As is clear from the above description of the embodiments, the heater control device of the present invention provides the following effects.

(1) Set the temperature to start preheating the vaporizer at a temperature higher than the set room temperature at which heating should start, and when the room temperature drops to the temperature at which heating should start, combustion can be started immediately to start heating. Since the heater is configured so that the heating condition is set, there is no waiting time for heating, and the range of room temperature fluctuation is reduced, making it possible to provide a heater that is comfortable for the user.

(2) After the room temperature exceeds the first set temperature, the vaporization heater is not energized until it becomes lower than the second set temperature.
This has the effect of reducing power consumption due to energization of the heater, compared to one in which the vaporization heater is constantly energized.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing a control device for a heater according to an embodiment of the present invention, Fig. 2 is a flow chart explaining the processing flow of the control device η of the heater, and Fig. 3 is a room temperature of the heater. The time change of It is a time chart diagram showing the condition rB of the pump and heater with respect to the temporal change in room temperature. 1... Pump, 2... Heater, 3... Vaporizer, 7
... Control device, 8... Room temperature detection means, 13... Combustion device, 21... First comparison section, 22... Pump control section, 23... Third comparison section, 24 . . . second comparison section, 25 . . . preheating section. Figure 2, Figure 3, Figure j

Claims (1)

[Claims] 1. A combustion device for burning liquid fuel, which has a vaporizer that vaporizes liquid fuel, a vaporization heater that heats the vaporizer, and a pump that delivers liquid fuel to the heated vaporizer, at room temperature. A control device for a heater that is controlled based on a temperature detected by a detection means, comprising: a preheating section that energizes the vaporization heater until the vaporization heater reaches a temperature at which vaporization is possible; a pump control section that controls operation of the pump; a first comparison section that outputs a stop signal to the pump control section when the detected temperature of the room temperature detection means is equal to or higher than a first set temperature; and a first comparison section that outputs a stop signal to the pump control section when the detected temperature of the room temperature detection means is equal to or higher than a first set temperature; A controller for a heater, comprising: a second comparison section that outputs a start signal; and a third comparison section that outputs an operation signal to the pump control section at a temperature below a third set temperature that is lower than the second set temperature. .