JP2000186819A - Heater - Google Patents

Abstract

PROBLEM TO BE SOLVED: To obtain a heater capable of controlling a heating medium temperature while considering a room temperature. SOLUTION: A heating medium is circulated through a heat exchanger 13 to be heated by a combustor 1, an external radiator 15 and an inner heat exchanger 18. A radiator fan 20 for supplying air toward the radiator 18 is provided. A combustion of the combustor 1 is controlled by a heating medium temperature of an outlet side of the heat exchanger or a heating medium temperature returned from the radiator 15, and a radiating heat quantity from the exchanger 18 is controlled according to a room temperature or the room temperature and the heating medium temperature returned from the radiator 15. The radiating amount is controlled by controlling the fan 20 or controlling the heating medium amount flowing through the radiator 18.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heater incorporating a hot water heating device.

[0002]

2. Description of the Related Art A burner provided in a combustor body and a heat exchanger heated by the exhaust of the burner are provided. The heat exchanger is provided between an external radiator provided outside the combustor body. A heater that circulates a medium is known (Japanese Patent Application Laid-Open No.
-196390).

[0003] When the heat radiation of the external radiator is no longer required or when the amount of heat radiation is greatly reduced,
There is a disadvantage that the temperature of the heat medium rises and the heat exchanger is overheated, causing the heat medium to boil in the heat exchanger.

[0004] Therefore, this type of radiator is used to radiate extra heat when the need for heat radiation from the external radiator is eliminated, or when the amount of heat radiation is reduced, or when the amount of heat radiation is significantly reduced. Along with the provision, a damper that switches between a state in which the exhaust path of the burner is exhausted without passing through the installation location of the heat exchanger and a state in which the exhaust path is exhausted through the installation location is provided with an exhaust path, and the heat radiation amount has been reduced. At this time, or when the amount of heat radiation is significantly reduced, the damper is switched to prevent the heat exchanger from being heated by the exhaust gas as much as possible.

[0005]

For this reason, the structure of the heater becomes complicated, and when the size of the damper is increased to increase the amount of heating of the heat medium, the blocking rate of the damper becomes worse. When trying to increase the heat receiving efficiency of the heat exchanger, the above-described problem of boiling occurs, and there is a problem that it takes time to raise the temperature of the heat medium to a predetermined temperature. An object of the present invention is to obtain a heater that eliminates such a problem.

[0006]

The invention according to claim 1 of the present application includes a combustor provided in a combustor housing and capable of adjusting a combustion amount, and a heat exchanger heated by hot air of the combustor, The heat exchanger is of a type in which a heat medium is circulated between the heat exchanger and an external radiator provided outside the combustor case. In the heater, the heat medium is circulated between the heat exchanger and the external radiator. An internal radiator provided in the path, the internal radiator provided with a variable-speed radiator fan for blowing air toward the internal radiator, and an outlet for detecting a temperature of a heat medium at an outlet side of the heat exchanger. A temperature detector, a return temperature detector for detecting the temperature of the heat medium returning from the external radiator, a room temperature detector for detecting the room temperature, and a microcomputer for registering the detected temperature in these temperature detectors are provided. The microcomputer calculates the amount of combustion in the combustor based on the outlet temperature of the heat medium. Example: A proportional control pattern that is set so that the combustion amount increases as the number of stages increases, and a proportional control pattern that sets the rotation speed of the radiator fan based on the return temperature of the heat medium as the number of proportional stages increases And a proportional control pattern in which the number of rotations of the radiator fan is set to increase as the number of proportional stages increases with respect to the room temperature, and the outlet side set temperature of the heat medium and the outlet temperature are detected by the outlet temperature detector. By burning at a combustion amount corresponding to the number of proportional stages of the proportional control pattern obtained from the difference from the temperature, it is possible to prevent a problem that the heat medium abnormally rises in the heat exchanger and the heat medium boils. . Moreover, the number of proportional stages of the proportional control pattern obtained from the difference between the return side set temperature of the heat medium and the temperature detected by the return temperature detector, and the difference between the room temperature set temperature and the temperature detected by the room temperature detector. Compare the magnitude of the obtained proportional control pattern with the number of proportional stages using a microcomputer.
By selecting the smaller of the two proportional stages and rotating the radiator fan at the number of rotations corresponding to the selected proportional stage, the return temperature of the heat medium, which changes due to the change in the amount of heat radiated by the external radiator, is reduced. It can be adjusted while taking room temperature into account. The invention according to claim 2 of the present application comprises a combustor provided in a combustor casing and capable of adjusting the amount of combustion, and a heat exchanger heated by hot air of the combustor, wherein the heat exchanger comprises a combustor casing. In a heater configured to circulate a heat medium between an external radiator provided outside, an internal radiator is provided in a circulation path that circulates a heat medium between the heat exchanger and the external radiator, The internal radiator has
A variable-speed radiator fan that blows toward the internal radiator is provided, and an outlet temperature detector that detects the temperature of the heat medium at the outlet side of the heat exchanger, and detects a temperature of the heat medium that returns from the external radiator. Return temperature detector, a room temperature detector for detecting the room temperature, and a microcomputer for registering the temperature detected by these temperature detectors, and the microcomputer is provided with a combustor based on the outlet side temperature of the heat medium. The proportional control pattern is set so that the amount of combustion increases as the number of proportional stages increases, and the amount of combustion in the combustor increases as the number of proportional stages increases based on the return temperature of the heat medium. Registered a proportional control pattern and a proportional control pattern in which the number of rotations of the radiator fan is set to increase as the number of proportional stages increases with reference to room temperature, and the outlet side set temperature of the heat medium and the outlet temperature detector Detected The microcomputer calculates the ratio between the number of proportional stages of the proportional control pattern obtained from the temperature difference and the number of proportional stages of the proportional control pattern obtained from the difference between the set temperature of the heat medium return side and the temperature detected by the return temperature detector. Compare and select the smaller proportional stage number of both proportional stages, and burn with the combustion amount corresponding to the selected proportional stage number, determined from the difference between the room temperature set temperature and the temperature detected by the room temperature detector By rotating the radiator fan at the number of rotations corresponding to the number of proportional stages in the proportional control pattern, control corresponding to changes in the amount of heat radiated by the external radiator is quickly performed. By rotating the radiator fan at the number of rotations corresponding to the number of proportional stages of the proportional control pattern determined from the difference from the detected temperature, the amount of heat released from the internal radiator can be adjusted to prevent the room temperature from rising too high . According to a third aspect of the present invention, there is provided a combustor provided in a combustor casing and capable of adjusting a combustion amount, and a heat exchanger heated by hot air of the combustor, wherein the heat exchanger comprises a combustor casing. In a heater configured to circulate a heat medium between an external radiator provided outside and a branch path that branches from a circulation path that circulates a heat medium between the heat exchanger and the external radiator. An internal radiator that circulates a heat medium between the heat exchanger and the heat exchanger is provided, and a control valve that sets a ratio of the heat medium flowing through the circulation path and the branch path is provided in the branch path. A radiator fan for blowing air toward the internal radiator, and an outlet temperature detector for detecting the temperature of the heat medium on the outlet side of the heat exchanger; and a return for detecting the temperature of the heat medium returning from the external radiator. A temperature detector, a room temperature detector that detects room temperature, A proportional control pattern in which a microcomputer for registering the temperature is provided, and the microcomputer sets a combustion amount in the combustor based on an outlet side temperature of the heat medium so that the combustion amount increases as the number of proportional stages increases. A proportional control pattern that sets the position of the control valve so that the proportion of the heat medium flowing through the branch path increases with each increase in the number of proportional stages based on the return temperature of the heat medium, and a heat medium flowing through the branch path based on room temperature. A proportional control pattern that sets the position of the control valve so that the ratio increases as the number of proportional stages increases is registered, and the ratio is determined from the difference between the outlet side set temperature of the heat medium and the temperature detected by the outlet temperature detector. By burning with a combustion amount corresponding to the number of proportional stages of the proportional control pattern, it is possible to prevent a problem that the temperature of the heat medium rises abnormally in the heat exchanger and the heat medium boils.

In addition, the number of proportional stages of the proportional control pattern obtained from the difference between the return side set temperature of the heat medium and the temperature detected by the return temperature detector, and the room temperature set temperature and the temperature detected by the room temperature detector. Microcomputer compares the size of the proportional control pattern obtained from the difference with the proportional stage number, selects the smaller one of the two proportional stages, and sets the control valve at a position corresponding to the selected proportional stage number. Therefore, the amount of heat radiated by the heat medium flowing through the internal radiator can be adjusted, and the return temperature of the heat medium, which changes according to the change in the amount of heat radiated by the external radiator, can be adjusted to the set temperature while taking room temperature into account. Can be approached. The invention according to claim 4 of the present application includes a combustor provided in a combustor casing and a heat exchanger heated by hot air from the combustor, wherein the heat exchanger is provided outside the combustor casing. A heater configured to circulate a heat medium between the heat exchanger and an external radiator, wherein the heat exchanger is circulated from a circulation path that circulates the heat medium between the heat exchanger and an external radiator. An internal radiator for circulating a heat medium is provided between the internal radiator and a control valve for setting a ratio of a heat medium flowing through the circulation path and the branch path. A radiator fan that blows air toward the outlet, and an outlet temperature detector that detects the temperature of the heat medium on the outlet side of the heat exchanger, and a return temperature detector that detects the temperature of the heat medium returning from the external radiator,
A room temperature detector for detecting the room temperature and a microcomputer for registering the temperature detected by these temperature detectors are provided, and the microcomputer has a number of proportional stages for the amount of combustion in the combustor based on the outlet side temperature of the heat medium. A proportional control pattern set to increase each time the temperature rises, a proportional control pattern set to increase the amount of combustion in the combustor as the number of proportional stages increases based on the return temperature of the heat medium, and a room temperature Register the room temperature proportional control pattern in which the position of the control valve is set so that the proportion of the heat medium flowing through the branch path increases as the number of proportional stages increases,
The number of proportional stages of the outlet temperature proportional control pattern determined from the difference between the outlet side set temperature of the heat medium and the temperature detected by the outlet temperature detector, and the return side set temperature of the heat medium and the return temperature detected by the return temperature detector Microcomputer compares the magnitude with the number of proportional stages of the proportional control pattern obtained from the difference from the temperature, selects the smaller proportional stage number of both proportional stages, and burns with the combustion amount corresponding to the selected proportional stage number, In particular, by controlling the combustion taking into account the return temperature of the heat medium, it is possible to quickly perform control in accordance with the change in the amount of heat released by the external radiator. By rotating the radiator fan at a rotational speed corresponding to the number of proportional stages of the proportional control pattern obtained from the difference from the temperature, the amount of heat radiation from the internal radiator can be adjusted, and the room temperature can be maintained at a desired temperature. . Moreover, the control valve is set at a position corresponding to the number of proportional stages of the proportional control pattern obtained from the difference between the set temperature of the room temperature and the temperature detected by the room temperature detector, and in particular, combustion takes into account the return temperature of the heat medium. By controlling the temperature, the control that responds quickly to the change in the amount of heat radiated by the external radiator is performed, and the proportional control pattern obtained from the difference between the room temperature set temperature and the temperature detected by the room temperature detector is proportional. By setting the control valve at a position corresponding to the number of stages, the amount of heat radiation from the internal radiator can be adjusted, and the temperature of the room does not rise too much.

[0008]

Embodiments of the present invention will be described with reference to the drawings.

In FIG. 1, reference numeral 1 denotes a pot type combustor which is provided in a combustor case 2 and mainly uses kerosene as fuel. The pot type combustor 1 has a large number of air holes 3a formed in a peripheral surface thereof in several stages. A pot 3, an air chamber 4 surrounding the pot 3, and a combustion chamber 5 provided above the pot 3;
The air is supplied from outside through a supply / exhaust tube 8 connected to the combustion blower 7 by communicating with an exhaust port of a combustion blower 7 provided on a mount 6 on which the pot type combustor 1 is mounted.

Reference numeral 9 denotes an oil leveling device, 10 an electromagnetic pump for pumping up the fuel in the oil leveling device 1 and supplying it to the pot 3, 11 an oil supply pipe connected to the electromagnetic pump 10, and 11a an oil supply pipe 11a.
A nozzle extending to the center of the pot 3 provided at the tip of the nozzle 11a supplies fuel to the center of the pot 3 from the tip opening of the nozzle 11a. The combustion chamber 5 includes a heat-transmissive outer cylinder 5a made of heat-resistant glass that covers the periphery, and a red-hot cylinder 5b at the center, and is configured to emit radiant heat from the outer cylinder 5a.

Reference numeral 12 denotes an exhaust gas inflow chamber provided above the combustion chamber 5 and connected to the combustion chamber 5 through a communication hole 12a. The exhaust gas flowing into the inflow chamber 12 is discharged outside the room. Reference numeral 13 denotes a heat exchanger provided in the exhaust gas inflow chamber 12. The heat exchanger 13 circulates a heat medium made of water or the like mixed with an antifreeze liquid between the heat exchanger 13 and an external radiator 15 via a circulation path 14. 1 shows a heat exchanger. The external radiator 15 is, for example, a panel heater or a floor heater having a heat medium circulation path therein. The number of the external radiator 15 is not limited to one, but may be plural. 16 is an external radiator 1 of the circulation path 14.
5 is a pressure adjusting tank and water supply tank interposed on the return path 14a side for returning the heat medium from the heat exchanger 13 to the heat exchanger 13, 17 is a circulation pump interposed downstream of the pressure adjustment tank 16, and 18 is interposed in the circulation path 14. The internal radiator 18 may be interposed in the circulation path 14 so as to be connected in series with the external radiator 15 as shown in FIG. 1, or as shown in FIG. The external radiator 15 may be interposed in parallel with the external radiator 15 via a branch path 19 branched from the circulation path 14. Reference numeral 20 denotes a variable-speed radiator fan that blows wind toward the internal radiator 18.

When the internal radiator 18 is connected in parallel, a circulating pump 17 having a high ability to flow a heat medium flowing between the external radiator 15 and the internal radiator 18 is required. In the case where the vessel 18 is connected in series with the external radiator 15, there is an advantage that the circulating pump 17 having a low capacity can be used because a heat medium flowing through the branch 19 is not required.
However, the external radiator 15 may be provided with a control valve (not shown) for adjusting the amount of heat radiation from the external radiator 15. In the case of the series connection, the amount of the heat medium flowing through the internal radiator 18 is also changed by the operation of the control valve, and the amount of heat radiation from the internal radiator 18 is also affected by this. In order to avoid this effect as much as possible, in the series connection shown in FIG. 1, a bypass pipe 14c is provided for the outward pipe 14b and the return pipe 14a to the external radiator 15, and the bypass pipe 14c is provided with an opening control valve. 14d, and by adjusting the opening control valve 14d, the amount of the heat medium flowing through the internal radiator 18 is not affected by the control valve (not shown).

In the drawing, reference numeral 21 denotes an outlet temperature detector such as a thermistor for detecting the outlet temperature T1 of the heat medium of the heat exchanger 13, and 22 denotes a temperature T2 of the heat medium returning from the external radiator 15.
A reference numeral 23 denotes a room temperature detector such as a thermistor for detecting the room temperature T3 in which the combustor housing 2 is installed, and 25 denotes a pot temperature detector for detecting the temperature of the pot 3.

The combustion control circuit, as shown in FIG.
A microcomputer 24 is connected, the temperature detectors 21, 22, 23 and the pot temperature detector 25 are connected to the input side of the microcomputer 24, and the photodetector ssr1 is interposed on the output side of the operation circuit 26 of the radiator fan 20. And a relay RY1 having a contact ry1 interposed in the operation circuit 27 of the circulation pump 17.
And a solit state in which the output of the operation circuit 28 of the combustion fan 7 with the photodetector ssr2 interposed therebetween is variably adjusted.
Relay SSR2 and ignition heater 29 provided in pot 3
RY2 in which the contact ry2 is interposed in the operation circuit 30 of FIG.
And intervene. In the control circuit, reference numeral 31 denotes an operation circuit of the electromagnetic pump 10. The operation circuit 31 includes a photodetector ph1 for receiving a light pulse signal from a light emitting element PH1 provided on the output side of the microcomputer 24. By discharging the amount of fuel corresponding to the pulse signal from PH1 from the electromagnetic pump 10, the amount of combustion in the combustor is adjusted. In addition,
The operation circuit 31 includes a light emitting element PH2 which is connected to a power supply via an operation switch 32 and operates when the operation switch 32 is closed.
Is interposed on the input side of the microcomputer 24 and the operation switch 3
When the microcomputer 2 is closed, the microcomputer 24 inputs this.

The control of combustion by this control circuit will be described.
Operates to firstly drive the combustion blower 7 in accordance with the program registered in the microcomputer 24 to scavenge the inside of the pot 3 and to energize the operation circuit 30 of the ignition heater 29 to preheat the pot 3 with the ignition heater 29. Thereafter, the electromagnetic pump 10 is operated to supply fuel to the pot 3, and the circulation pump 17 is operated. The fuel supplied to the pot 3 is ignited and burned by the ignition heater 29. Thereafter, as described above, the variable combustion control (the rotation speed of the combustion blower 7 and the electromagnetic pump 10) is performed in accordance with the difference between the temperature T1 and the set temperature.
Is switched in multiple stages according to the difference between the temperature T1 and the set temperature). When the temperature T1 reaches or exceeds the maximum set temperature, the combustor 1 is extinguished (the electromagnetic pump 1).
0 is stopped), and the radiator fan 20 facing the internal radiator 18 is controlled by the temperature T2 and the temperature T3 as described above.

The fire is extinguished by opening the operation switch 32.
The power supply to the operation circuit 31 of the electromagnetic pump 10 is cut off, and the electromagnetic pump 10 is deactivated. As a result, the supply of fuel to the pot 3 is cut off. However, the combustion blower 7 and the circulation pump 17 continue to operate after that, and the pot 3 is cooled by the air from the combustion blower 7 so that the pot 3 is kept at a certain temperature or lower. Is detected by the pot temperature detector 25, the combustion blower 7 and the circulation pump 17 are stopped by a signal from the microcomputer 24, and the process is completed. The ignition heater 29 is de-energized by a timer built in the microcomputer 24 after ignition and combustion. Note that in FIG.
Is a temperature detector for detecting overheating, which comprises a thermistor for urgently stopping combustion in the heat exchanger 13 when the heat exchanger is abnormally overheated for some reason. 3 shows an on-off valve interposed in a circulation path 14 that is closed when the radiator 15 is inspected or the like.

One mode of temperature control by the present heater is that the microcomputer 24 controls the combustor 1 based on the outlet temperature T1 of the heat medium.
The number of revolutions of the radiator fan 20 is increased as the number of proportional stages increases, based on the outlet side temperature proportional control pattern set so that the amount of combustion at the outlet increases as the number of proportional stages increases, and the return temperature T2 of the heat medium. A return temperature proportional control pattern set as described above and a room temperature proportional control pattern set so that the number of rotations of the radiator fan 20 increases with an increase in the number of proportional stages based on the room temperature T3 are registered. Then, the fuel is burned at a combustion amount corresponding to the number of proportional stages of the proportional control pattern obtained from the difference between the outlet side set temperature of the heat medium and the temperature detected by the outlet temperature detector 21, and the return side setting of the heat medium is performed. The proportional number of return temperature proportional control patterns determined from the difference between the temperature and the temperature detected by the return temperature detector 22, and the proportional control determined from the difference between the room temperature set temperature and the temperature detected by the room temperature detector 23. The microcomputer 24 compares the number of proportional stages of the pattern with each other, selects the smaller one of the two proportional stages, and rotates the radiator fan 20 at a rotational speed corresponding to the selected proportional stage.

The outlet-side temperature proportional control pattern sets the maximum set temperature to, for example, 80 ° C., and sets a range from 70 ° C., which is 10 ° C. lower, to 76 ° C., which is 4 ° C. lower than the maximum set temperature, 80 ° C., for strong combustion. From 16 stages so as to be weakly burned, and set so as to be weakly burned at 76 ° C. or more.
The return temperature proportional control pattern includes a set temperature selected by the user in a range of 30 ° C. to 70 ° C. and a range of 10 ° C. lower than the set temperature, in which the radiator fan 20 rotates in a weak rotation (400 rpm).
Are set in seven stages so as to make a strong rotation (1000 rpm).

The room temperature proportional control pattern is 10 ° C. to 30 ° C.
Set temperature selected by the user in the range of ° C and 5 ° C from this
In the low range, the radiator fan 20 rotates weakly (400 rpm).
m), the setting is made in seven stages so as to make a strong rotation (1000 rpm) from the first stage.

Next, the temperature control by the present apparatus will be described with reference to the flowchart shown in FIG. After closing the operation switch, the microcomputer 24 is first started to perform the ignition operation. Then, combustion starts in the pot combustor 1 and the circulation pump 1
7 operates to force the heat medium to circulate between the heat exchanger 13, the external radiator 15 and the internal radiator 18. In the temperature control performed by controlling the combustion, the microcomputer 24 determines the number of stages of the outlet side temperature proportional control pattern at the outlet temperature T1 and determines whether or not the temperature T1 is equal to or lower than the set temperature, and sets the temperature T1. If the temperature is equal to or lower than the temperature, the fuel is burned at a combustion amount based on the determined number of stages. If the temperature T1 is higher than the set temperature, the fire is extinguished. During the continuation of the combustion, the control of the radiator fan 20 is performed by the return temperature T2 and the room temperature T3. To explain this, the number of steps of the return temperature proportional control pattern from the return temperature T2 of the heat medium and the number of steps of the room temperature proportional control pattern from the room temperature T3 are obtained. In addition, room temperature T3
Is within a set temperature range (a set temperature and a range lower by 5 ° C. than the set temperature), and if it is within the set temperature range, the rotation speed of the radiator fan 20 is controlled based on the room temperature proportional control pattern. If the room temperature T3 is not within the set temperature range,
It is determined whether or not the room temperature T3 is higher than the set temperature. If the room temperature T3 is higher, the radiator fan 20 is stopped. If the room temperature T3 is lower, the control based on the room temperature proportional control pattern is performed.

On the other hand, when the number of steps of the return temperature proportional control pattern is lower than the number of steps of the room temperature proportional control pattern, it is further determined whether the return temperature T2 is within the set temperature range (the set temperature and a range lower by 10 ° C. than this). If it is within the set temperature range, the rotation speed of the radiator fan 20 is controlled based on the return temperature proportional control pattern. And the return temperature T2
If the return temperature T2 is not within the set temperature range, it is determined whether the return temperature T2 is higher than the set temperature. If the return temperature T2 is higher, the radiator fan 20 is rotated at a high speed.

In the temperature control according to the above-described flowchart, the combustion is controlled only by the outlet side temperature T1, and the return temperature T2 of the heat medium does not directly affect the combustion. Therefore, when the amount of heat radiation in the external radiator 15 suddenly increases and decreases, for example, when some of the external radiators 15 are not used or when the number of used The return temperature T2 rises or falls, the radiator fan 20 is controlled accordingly, and the amount of heat radiated by the internal radiator 18 increases or decreases. As a result, the outlet temperature T1 of the heat medium changes accordingly. First, when the amount of heat radiation in the external radiator 15 suddenly decreases, control is performed to stop combustion or reduce the amount of combustion, and when the amount of heat radiation in the external radiator 15 suddenly increases, Since control to increase the amount of combustion is applied, a delay occurs in control of combustion.

In another embodiment of the temperature control by the present heater, the microcomputer 24 increases the amount of combustion in the combustor 1 based on the heat medium outlet side temperature T1 as the number of proportional stages increases, as in the above embodiment. An outlet side temperature proportional control pattern, a return temperature proportional control pattern set so that the amount of combustion in the combustor increases with each increase in the number of proportional stages based on the return temperature T2 of the heat medium, and a room temperature T3. And a room temperature proportional control pattern which is set so that the number of rotations of the radiator fan 20 is increased as the number of proportional stages is increased.

The number of proportional stages of the proportional control pattern obtained from the difference between the set temperature of the heat medium on the outlet side and the temperature detected by the outlet temperature detector 21, the set temperature T2 on the return side of the heat medium and the detection of the return temperature The microcomputer 24 compares the magnitude of the proportional control pattern obtained from the difference with the temperature detected by the detector 22 with the microcomputer 24, selects the smaller of the two proportional stages, and corresponds to the selected proportional stage. This is performed by burning the radiator fan 20 at the number of revolutions corresponding to the number of proportional stages of the proportional control pattern obtained from the difference between the set temperature of the room temperature and the temperature detected by the room temperature detector. This will be described with reference to a flowchart shown in FIG.
The microcomputer 24 calculates the number of stages of the outlet temperature proportional control pattern at the outlet temperature T1 and the number of stages of the return temperature proportional control pattern from the return temperature T2 of the heat medium, compares the two proportional stages, and determines the number of stages of the outlet temperature proportional control pattern. Is low,
It is determined whether or not the outlet temperature T1 is equal to or lower than the set temperature. If the outlet temperature T1 is equal to or lower than the set temperature, combustion control based on the outlet-side temperature proportional control pattern is performed.

During the combustion, the radiator fan 20
Is controlled based on the room temperature T3. To explain this, the number of stages of the room temperature proportional control pattern is obtained from the room temperature T3,
It is determined whether or not the room temperature T3 is within the set temperature range (the set temperature and a range lower by 5 ° C.).
From the room temperature T3, the rotation speed of the radiator fan 20 is controlled based on the number of stages of the room temperature proportional control pattern. If the room temperature T3 is not within the set temperature range, it is determined whether or not the room temperature T3 is higher than the set temperature. If the room temperature T3 is higher, the radiator fan 20 is stopped, and if the room temperature T3 is lower, control based on the number of room temperature proportional control patterns is performed.

On the other hand, comparing the number of stages of the outlet side temperature proportional control pattern with the number of stages of the return temperature proportional control pattern from the return temperature T2 of the heat medium, if the number of stages of the return temperature proportional control pattern is low, the return temperature T2 Is determined to be equal to or lower than the set temperature. If the temperature is equal to or lower than the set temperature, combustion control based on the return temperature proportional control pattern is performed. And the radiator fan 2 during combustion
For 0, the same control as the above-described control based on the room temperature is performed.

FIG. 6 shows another embodiment. In this embodiment, a control valve 35 for adjusting the ratio of the heat medium flowing through the circulation path 14 and the branch path 19 is provided. The amount of heat released from the internal radiator 18 is adjusted by adjusting the flow rate of the heat medium flowing through the internal radiator 18. To explain this, an electromagnetic or electric three-way valve is provided as the control valve 35, and the microcomputer 24 increases the amount of combustion in the combustor 1 based on the outlet side temperature T1 of the heat medium as the number of proportional stages increases. The control valve 35 is controlled based on the outlet-side temperature proportional control pattern set to perform the control and the return temperature T2 of the heat medium.
The control valve 3 increases the amount of the heat medium flowing through the branch passage 19, that is, the internal radiator 18, through the control valve 3 as the number of proportional stages increases.
The return temperature proportional control pattern for setting the position of No. 5 and the position of the control valve 35 are set such that the amount of heat medium flowing through the branch 19 via the control valve 35 increases with the number of proportional stages based on the room temperature T3. Is registered. One aspect of the temperature control according to the present embodiment is a combustion control corresponding to the number of proportional stages of the proportional control pattern obtained from the difference between the outlet-side set temperature T1 of the heat medium and the temperature detected by the outlet temperature detector 21. And the number of proportional stages of the return temperature proportional control pattern obtained from the difference between the return side set temperature T2 of the heat medium and the temperature detected by the return temperature detector 22, the room temperature set temperature T3 and the room temperature detection. The microcomputer 24 compares the magnitude of the proportional control pattern obtained from the difference with the temperature detected by the detector 23 with the microcomputer 24, selects the smaller one of the two proportional stages, and corresponds to the selected proportional stage number. By setting the position of the control valve 35 by adjusting the amount of the heat medium flowing through the internal radiator 18, the room temperature and the temperature of the heat medium are controlled.

This will be described with reference to the flowchart shown in FIG. 7. The microcomputer 24 determines the number of stages of the outlet side temperature proportional control pattern at the outlet temperature T1 and calculates the temperature T.
It is determined whether 1 is equal to or lower than the set temperature. If the temperature T1 is equal to or lower than the set temperature, the fuel is burned at a combustion amount based on the determined number of stages of the outlet side temperature proportional control pattern. If the temperature T1 is higher than the set temperature, the fire is extinguished. Then, during the continuation of the combustion, the control valve 35 performs the control at the return temperature T2 and the room temperature T3. Explaining this, the return temperature T2 of the heat medium
And the number of steps of the room temperature proportional control pattern is obtained from the room temperature T3 and the number of steps of the room temperature proportional control pattern.
It is determined whether or not the room temperature T3 is within the set temperature range (the set temperature and a range lower by 5 ° C.).
The position of the control valve 35 is adjusted based on the room temperature proportional control pattern, and the amount of the heat medium flowing through the internal radiator 18 is adjusted.
The room temperature and the temperature of the heating medium are controlled. If the room temperature T3 is not within the set temperature range, it is determined whether or not the room temperature T3 is higher than the set temperature. If the room temperature T3 is higher, the position of the control valve 35 is set to a position where the heat medium does not flow into the internal radiator 18, and For example, control is performed based on the room temperature proportional control pattern. On the other hand, if the number of steps of the return temperature proportional control pattern is lower than the number of steps of the room temperature proportional control pattern, it is determined whether or not the return temperature T2 is within a set temperature range (a range lower than the set temperature by 10 ° C.) If the temperature is within the set temperature range, the position of the control valve 35 is adjusted based on the return temperature proportional control pattern, and the internal radiator 1 is adjusted.
8 is controlled.

If the return temperature T2 is not within the set temperature range, it is determined whether or not the return temperature T2 is higher than the set temperature. If the return temperature T2 is higher, the heat medium does not flow to the internal radiator 18 by changing the position of the control valve 35. The control valve 35 is set at the position, and if it is low, the control is performed based on the room temperature proportional control pattern. Another aspect of the temperature control in this embodiment (shown in FIG. 6) is that the microcomputer 24 increases the amount of combustion in the combustor 1 based on the outlet temperature T1 of the heat medium as the number of proportional stages increases. , A proportional control pattern set such that the amount of combustion in the combustor increases with each increase in the number of proportional stages based on the return temperature T2 of the heat medium, and a branch passage 19 based on the room temperature T3. A proportional control pattern in which the position of the control valve 35 is set such that the proportion of the heat medium decreases as the number of proportional stages increases is registered. Then, the number of proportional stages of the proportional control pattern determined from the difference between the outlet side set temperature T1 of the heat medium and the temperature detected by the outlet temperature detector 21, the return side set temperature T2 of the heat medium and the return temperature detector 22 Microcomputer compares the magnitude of the proportional control pattern obtained from the difference with the detected temperature with the proportional stage number, selects the smaller proportional stage number of both proportional stages, and calculates the combustion amount corresponding to the selected proportional stage number. By setting the control valve 35 at a position corresponding to the number of proportional stages of the proportional control pattern determined from the difference between the room temperature set temperature 23 and the room temperature detected by the room temperature detector 23, the room temperature and the heat are set. Control the temperature of the media.
The control is as shown in the flow chart shown in FIG. 8, and the flow is the same as the flow chart shown in FIG. 5 except that the rotation speed of the radiator fan 20 is replaced by the rotation position of the control valve 35.

[0030]

According to the first aspect of the present invention, the combustion in the combustor is controlled based on the temperature at the outlet side of the heat medium exiting the heat exchanger. It is possible to prevent a problem in that the temperature of the heat exchanger rises abnormally and boils in the heat exchanger. In addition, by controlling the rotation of the radiator fan, which determines the amount of heat radiated from the internal radiator, based on the room temperature and the temperature of the heat medium returning from the external radiator, the heat of the heat medium can be released effectively without disturbing the room temperature. Can be done. According to the invention described in claim 2 of the present application, the combustion in the combustor is performed by the temperature of the outlet side of the heat medium exiting the heat exchanger,
Combustion is controlled by taking into account the return temperature of the heat medium returning from the external radiator, so that it is possible to prevent the problem that the temperature of the heat medium rises abnormally and boils in the heat exchanger. In particular, by taking into account the return temperature of the heat medium returning from the external radiator, control corresponding to the change in the amount of heat radiation in the external radiator is performed promptly, and the amount of heat radiation from the internal radiator is determined. By controlling the rotation of the radiator fan based on the room temperature, the heat of the heat medium can be released without disturbing the room temperature. According to the invention described in claim 3 of the present application, the combustion in the combustor is controlled based on the temperature of the exit side of the heat medium exiting the heat exchanger, so that the temperature of the heat medium is abnormally high. The problem of rising and boiling in the heat exchanger can be prevented. Moreover, the amount of heat medium flowing through the internal radiator, which determines the amount of heat radiated from the internal radiator,
By controlling the temperature based on the room temperature and the temperature of the heat medium returning from the external radiator, the heat of the heat medium can be effectively released without disturbing the room temperature. According to the invention described in claim 4 of the present application, the combustion in the combustor is performed by taking into consideration the temperature of the heat medium exiting the heat exchanger on the outlet side and the return temperature of the heat medium returning from the external radiator. Since combustion is controlled, it is possible to prevent the problem that the temperature of the heat medium rises abnormally and boil in the heat exchanger beforehand, especially considering the return temperature of the heat medium returning from the external radiator. As a result, control that responds quickly to changes in the amount of heat radiated by the external radiator is performed, and the amount of heat medium flowing through the internal radiator, which determines the amount of heat radiated from the internal radiator, is controlled based on room temperature. By doing so, the heat of the heat medium can be released without disturbing the room temperature.

[Brief description of the drawings]

FIG. 1 is a cut-away side view showing an example of an embodiment of the present invention.

FIG. 2 is a cutaway side view showing a modified example.

FIG. 3 is a control circuit diagram

FIG. 4 is an embodiment of the flowchart of FIGS.

FIG. 5 is another embodiment of the flowchart of FIGS.

FIG. 6 is a cut-away side view showing another embodiment.

FIG. 7 is an embodiment of the flowchart of FIG. 6;

8 is another embodiment of the flowchart of FIG.

[Explanation of symbols]

1 combustor 2 combustor housing
3 pot 10 electromagnetic pump 13 heat exchanger
14 Circulation path 15 External radiator 18 Internal radiator
19 branch road 20 heat dissipation fan 21 temperature detector
22 temperature detector 23 temperature detector

Claims (4)

[Claims] 1. A combustor provided in a combustor casing and capable of adjusting the amount of combustion, and a heat exchanger heated by hot air of the combustor, wherein the heat exchanger is provided outside the combustor casing. In a heater configured to circulate a heat medium between an external radiator and an external radiator, an internal radiator is provided in a circulation path that circulates a heat medium between the heat exchanger and the external radiator. Is provided with a variable-speed radiator fan for blowing air toward the internal radiator, and an outlet temperature detector for detecting a temperature of a heat medium at an outlet side of the heat exchanger; and a temperature of a heat medium returning from the external radiator. A return temperature detector for detecting the temperature, a room temperature detector for detecting the room temperature, and a microcomputer for registering the temperature detected by these temperature detectors, wherein the microcomputer performs combustion based on the temperature of the outlet side of the heat medium. The amount of combustion in the vessel increases as the number of proportional stages increases. The proportional control pattern that was set, the proportional control pattern that was set so that the number of rotations of the radiator fan based on the return temperature of the heat medium increased as the number of proportional stages increased, and the number of rotations of the radiator fan that was set based on room temperature A proportional control pattern set to increase as the number of proportional stages increases is registered, and the number of proportional stages in the proportional control pattern obtained from the difference between the set temperature of the outlet of the heat medium and the temperature detected by the outlet temperature detector is registered. While burning with the amount of combustion corresponding to
The number of proportional stages of the proportional control pattern obtained from the difference between the return side set temperature of the heat medium and the temperature detected by the return temperature detector, and the difference between the room temperature set temperature and the temperature detected by the room temperature detector. The microcomputer compares the proportional control pattern with the proportional control step, selects the smaller one of the two proportional control steps, and rotates the radiator fan at a rotation speed corresponding to the selected proportional control step. And heating machine. 2. A combustor provided in a combustor casing and capable of adjusting a combustion amount, and a heat exchanger heated by hot air of the combustor, wherein the heat exchanger is provided outside the combustor casing. In the heater that circulates the heat medium between the radiator and
An internal radiator is provided in a circulation path for circulating a heat medium between the heat exchanger and the external radiator, and the internal radiator includes a variable-speed radiator fan that blows air toward the internal radiator. Provided, and an outlet temperature detector for detecting the heat medium temperature on the outlet side of the heat exchanger, a return temperature detector for detecting the heat medium temperature returning from the external radiator, and a room temperature detector for detecting the room temperature, A microcomputer for registering the temperature detected by these temperature detectors is provided, and the microcomputer controls the combustion amount in the combustor based on the outlet side temperature of the heat medium so that the combustion amount increases as the number of proportional stages increases. A proportional control pattern that is set, and a proportional control pattern that is set so that the combustion amount in the combustor increases as the number of proportional stages increases based on the return temperature of the heat medium,
Register a proportional control pattern set so that the number of rotations of the radiator fan increases as the number of proportional stages increases with respect to the room temperature, and set the outlet side set temperature of the heat medium and the temperature detected by the outlet temperature detector. Microcomputer compares the number of proportional stages of the proportional control pattern obtained from the difference between the temperature and the number of proportional stages of the proportional control pattern obtained from the difference between the set temperature of the heat medium return side and the temperature detected by the return temperature detector. , Selecting the smaller one of the two proportional stages, burning with the combustion amount corresponding to the selected proportional stage number, and proportional control determined from the difference between the room temperature set temperature and the temperature detected by the room temperature detector. A heater characterized in that a radiator fan is rotated at a rotation speed corresponding to the number of proportional stages of a pattern. 3. A combustor provided in a combustor casing and capable of adjusting the amount of combustion, and a heat exchanger heated by hot air from the combustor, wherein the heat exchanger is provided outside the combustor casing. In the heater that circulates the heat medium between the radiator and
An internal radiator that circulates the heat medium between the heat exchanger and the external radiator through a branch that branches from a circulation path that circulates the heat medium between the heat exchanger and the external radiator; A control valve for setting a ratio of a heat medium flowing through the circulation path and the branch path, a radiator fan for blowing air toward the internal radiator, and an outlet side of the heat exchanger. An outlet temperature detector for detecting the temperature of the heat medium, a return temperature detector for detecting the temperature of the heat medium returning from the external radiator, a room temperature detector for detecting the room temperature, and a temperature detected by these temperature detectors. A microcomputer to be registered is provided, and the microcomputer has
The proportional control pattern is set so that the amount of combustion in the combustor increases with each increase in the number of proportional stages based on the outlet temperature of the heat medium, and the ratio of the heat medium flowing through the branch path based on the return temperature of the heat medium. A proportional control pattern that is set to increase as the number of proportional stages increases, and a proportional control pattern that sets the position of the control valve so that the proportion of the heat medium flowing through the branch path increases with the number of proportional stages based on room temperature. And register
While burning at a combustion amount corresponding to the number of proportional stages of the proportional control pattern determined from the difference between the outlet-side set temperature of the heat medium and the temperature detected by the outlet temperature detector, the return-side set temperature and return of the heat medium The magnitude of the proportional step number of the proportional control pattern obtained from the difference between the temperature detected by the temperature detector and the proportional step number of the proportional control pattern obtained from the difference between the set room temperature and the temperature detected by the room temperature detector. A microcomputer, and the smaller one of the two proportional stages is selected, and the control valve is set at a position corresponding to the selected proportional stage number. 4. A combustor provided in a combustor casing and a heat exchanger heated by hot air of the combustor, wherein the heat exchanger is provided between an external radiator provided outside the combustor casing. In a heater configured to circulate a heat medium through the heat exchanger, heat is radiated between the heat exchanger and the external radiator through a branch path that branches from a circulation path that circulates the heat medium. An internal radiator for circulating a medium is provided, and a control valve for setting a ratio of the heat medium flowing through the circulation path and the branch path is provided in the branch path, and the internal radiator blows air toward the internal radiator. An outlet temperature detector provided with a radiator fan and detecting the temperature of the heat medium on the outlet side of the heat exchanger, a return temperature detector detecting the temperature of the heat medium returning from the external radiator, and a room temperature detecting the room temperature A detector and a microcomputer for registering the temperature detected by these temperature detectors are provided, The microcomputer has a proportional control pattern set to increase the combustion amount in the combustor based on the outlet temperature of the heat medium as the number of proportional stages increases, and a proportional control pattern based on the return temperature of the heat medium as the reference increases. A proportional control pattern set to increase the amount of combustion in the combustor, and a room temperature at which the position of the control valve is set so that the proportion of the heat medium flowing through the branch path increases with each increase in the number of proportional stages based on the room temperature Register the proportional control pattern, the number of proportional stages of the outlet temperature proportional control pattern determined from the difference between the outlet side set temperature of the heat medium and the temperature detected by the outlet temperature detector, and the return side set temperature of the heat medium. Compare the size of the proportional control pattern with the number of proportional stages obtained from the difference from the temperature detected by the return temperature detector with a microcomputer, select the smaller of the two proportional stages, and correspond to the selected proportional stage number. Burning In conjunction with burning, heating machine and sets the control valve to the room set temperature and the difference between the position corresponding to the proportional number of room temperature proportional control pattern obtained from the detected temperature in the room detector.