JPS63318412A - Controller for warm-air heater - Google Patents

Abstract

PURPOSE:To obtain the preferable temperature of warm-air, by a method wherein the amount of combustion is change automatically in synchronizing with the amount of ventilation of warm-air usually, however, only the amount of ventilation of warm-air or the amount of combustion is increased or decreased manually by a specified amount from the amount of ventilation or the amount of combustion only that time is necessary. CONSTITUTION:A controller 1 is constituted of the detecting means of a room temperature detector 7, an amount of combustion control means 12, changing the amount of combustion in accordance with a detector room temperature and a set temperature, a fan airflow rate control means 13, previously set so as to correspond to said amount of combustion one to one, a switch treating means 14, reading the operating state of switches arranged on a panel 9, a correcting amount setting means 15', changing sequentially the amount of correction increased or decreased in accordance with the operating state of the switches, a fan airflow rate correcting means 15, determining the operating number of rotation of a fan 8 by adding the amount of correction outputted from the correcting amount setting means 15', and a fan driving means 13', inputting the output information from the fan airflow rate correcting means 15' to regulate the fan 8 so as to be rotated with a set number of rotation.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a combustor control device that varies the amount of combustion and the amount of air blown by a blower depending on room temperature.

Conventional technology Warm air heaters, generally called automatic temperature control types, compare the room temperature detected by a built-in room temperature detector with the set temperature, and automatically switch the combustion amount to adjust the temperature according to the temperature difference. It looks like this. This type of heater uses a blower to blow heated air into the room, and when the room temperature is low, it increases the combustion rate and at the same time increases the air flow to a strong air volume to send warm air far away, and when the room temperature is high. When this happens, the room temperature is controlled by lowering the amount of combustion and air flow. Specifically, this change in the amount of air blown is performed by changing the rotational speed of the blower, and conventionally, this change in the amount of air blown was simultaneously changed in conjunction with the above-mentioned change in the amount of combustion. Therefore, the user only needs to set the set temperature, and the device automatically determines the amount of combustion and air flow, raises the room temperature to the set temperature, and maintains the room temperature at that temperature.

FIG. 7 is a schematic diagram showing a conventional combustion configuration.

Reference numeral 101 denotes a fuel tank, in which fuel oil is sucked and pumped by an electromagnetic pump 102 and then pumped to a carburetor 103.

The vaporizer 103 is heated by heat generated by combustion and an electric heating element 104, and the fuel oil is vaporized here and sent to the nozzle 10.
5 into the mixing pipe 106, and the primary air is sucked in by the ejector action of this ejection force, and is ejected from the flame port 107 where it is combusted. Combustion heat is discharged from blower 108 through outlet A.
It is then sent into the room from here. Further, a room temperature detector 109 is attached near the inlet of the blower 108.

FIG. 8 shows a conventional control circuit, in which 110 is a power supply;
A control unit 111 performs combustion control by controlling the temperature of the electric heating element 104, detecting the room temperature by the room temperature detector 109, and controlling various timings. The control unit 111 first performs preheating by turning on the relay 112 at the start of operation, and when the preheating is completed, turns off the relay 112 and turns on the relay 113.
By turning on the blower 108 and electromagnetic pump 102
Then, the igniter 114 is energized to ignite and burn.

The relay 115 is a 2-circuit, 2-contact relay that connects the room temperature detector 10.
When the room temperature detected at step 9 is lower than the set temperature, the a contact on the strong rotation side of the blower 108 closes to the a' contact on the strong operation side of the electromagnetic pump 1026, and at the same time, the blower 108 becomes strong combustion.
becomes a strong rotation. Conversely, when the room temperature is higher than the set temperature, the relay 115 closes to the b contact and b' contact side, combustion becomes weak combustion and at the same time, the blower rotates weakly. This blower 1
The rotational speeds of strong rotation and weak rotation of 08 are set in consideration of the temperature rise inside the product and the temperature of hot air at the outlet, so that the rotational speed corresponds to the amount of combustion.

As mentioned above, conventional heaters try to keep the room temperature constant by automatically changing the amount of combustion and the amount of warm air blown according to the room temperature, but the amount of air blown is set at a predetermined rotation speed depending on the amount of combustion. The amount of air blown and the amount of combustion always operated with only one type of predetermined correlation.

Problems to be Solved by the Invention Therefore, with the above-mentioned conventional configuration, in recent years where individual sensation has become more important, it is difficult to obtain hot air that is specific to one's preference, and it is not possible to obtain hot air according to one's personal preference. In some cases, there was a problem in that a comfortable feeling of heating could not be obtained. In other words, human sensations vary greatly from person to person, and even when the temperature of hot air is the same, some people feel hot or chilly, and some people feel that the blower's wind is too strong.Requirements regarding hot air temperature and air volume are vastly different. It's all different. However, the hot air temperature and air volume are already determined at the time of the device manufacturer's design, and with conventional hot air heaters, users cannot change the hot air temperature according to their own preferences, making it difficult for people to In some cases, it was difficult to use.

The present invention solves this conventional problem. Normally, the combustion amount and air blowing amount change automatically in synchronization, but if necessary, only the hot air blowing amount or combustion amount can be changed at that time. The purpose of this is to make it possible to manually increase or decrease the amount by a specific amount so that the desired hot air temperature can be obtained.

Means for Solving the Problems In order to achieve the above object, the control device for the hot air heater of the present invention includes a manual switch that instructs correction of the air flow rate or combustion amount, and a manual switch that sequentially changes the correction amount according to the combustion amount. The hot air blowing amount or combustion amount, which is changed according to the room temperature detected by the room temperature detector, is increased or decreased based on the output from the correction amount setting means.

Effect of the present invention With the above-described configuration, the combustion amount and hot air blowing amount are automatically set according to the detected room temperature, but the set burning amount or air blowing amount is output from the combustion amount or blower airflow control means. Since the correction is made before the combustion rate is adjusted, either the combustion amount or the air blowing amount remains the same, but only the other changes, making it possible to obtain warm air that is different from the warm air that is automatically controlled. .

Embodiments Hereinafter, embodiments of the present invention will be described based on the accompanying drawings. FIG. 1 is a configuration diagram of an embodiment of the present invention, in which 1 is an outer frame of a hot air heater, 2 is a fuel tank, and 3 is a fuel supply tank whose discharge amount changes depending on the applied pulse frequency. electromagnetic pump,
4 is an electric heating element, and 5 is a vaporizer, which is heated to a vaporization temperature by the electric heating element 4.

6 is a combustor. Further, a room temperature detector 7 is attached near the inlet of the blower 8, and inputs an electrical signal obtained by converting the room temperature to a control device 10 located inside the panel 9. Various switch groups are also arranged on the panel 9 (not shown).

The control device 10 uses a room temperature detection means 11 which receives the output of the room temperature detector 7 as an input, and changes the pulse frequency output to the electromagnetic pump 3 according to the detected room temperature and a preset temperature to determine the amount of combustion. a combustion amount control means 12 that changes the combustion amount; a blower air volume control means 13 that outputs rotation speed information of the blower 8 that is set in advance in one-to-one correspondence to the combustion amount; and operation of switches provided on the panel 9. a switch processing means 14 for reading the situation; a correction amount setting means 15' for sequentially changing the amount of correction to be adjusted depending on the operation information of the switch processing means 14 according to the combustion rate, for example, as shown in Table 1; and the blower. Air volume control means 13
a blower air volume correction means 15 that determines the operating rotation speed of the blower 8 by adding the correction amount output from the correction amount setting means 15' to the set rotation speed of the blower 8 output from the blower air volume correction means 15; By using the output information as input and changing the energization time per half wave waveform to output, the blower 8
and a blower driving means 13' for adjusting the rotation speed to a set rotation speed. Here, the combustion rate is, for example, the maximum combustion amount of 3
000kcal and the minimum combustion amount is 900kcal, the minimum combustion amount is a combustion rate of 30%. Switches 16, 17, and 18 are switches for instructing correction of the rotation speed of the blower 8. When the switch 16 is pressed, the operating rotation speed of the blower 8 is changed as shown in Table 1 by the action of the correction amount setting means 15'. -10 to -99 pp depending on the combustion rate of
In the range of m, when switch 18 is pressed again, the same +10 to +
It is sequentially increased and decreased within a range of 1100 rp. switch 1
When 7 is pressed, the correction amount becomes zero. , Table 1 and Figure 2 in the margin below show an example of a specific circuit of the main part. Control device 1
0 consists of a microcomputer 19 and peripheral circuits. The microcomputer 19 shown here is
It is a so-called one-chip microcomputer that has a CPU, ROM, RAM, and input/output section.

Room temperature detector 7 is connected to an input section of microcomputer 19 via A/D converter 20. As a result, the temperature signal from the room temperature detector 7 is converted into a double code and read into the microcomputer 19. 21 is an operation switch for instructing the start of combustion; switch 16.17.1
Like B, it is input to the microcomputer 19.

Reference numeral 22 denotes a zero-cross detection circuit that generates a pulse signal having a width of about 1 ms to detect the zero-cross point of the AC signal source 23 synchronized with the power supply frequency, and uses this pulse signal to instruct the microcomputer 19 about the zero-cross point. A semiconductor switch 26 is composed of an LED as a light emitting part and a triac as a light receiving part. 27 is a relay for turning on and off the electric heating element 4, and 28 is an igniter. 25
is a driver, and a semiconductor switch 26, relay 27, electromagnetic pump 3, and igniter 2B are connected to the output terminal,
The output signal from the microcomputer 19 is amplified to drive each load. A pulse signal is applied to the electromagnetic pump 3, and the amount of fuel discharged, ie, the amount of combustion, changes depending on the frequency of the pulse signal.

On the other hand, the AC power supply 24 is connected in parallel with the electric heating element 4 via the contact 27m of the relay 27 and the blower 8 via the semiconductor switch 26, and the blower 8 is phase-controlled. That is, as shown in FIG. 3, the microcomputer 19 detects the zero-crossing point every half wave using the pulse signal from the zero-crossing detection circuit 22, and detects the zero-crossing point for a certain period of time (
1) Later, when an ON signal is issued from the output section, a current flows through the driver 25 to the light emitting section of the semiconductor switch 26, the triac of the light receiving section becomes conductive, and current is supplied to the blower 8. If the time t for turning off the blower 8 in each half wave (hereinafter referred to as "phase off time") is long, the rotation speed of the blower 8 decreases, and if it is short, the rotation speed increases, and the correlation is shown in Figure 4. It becomes like this.

Next, the operation of this embodiment configured as described above will be explained.

When the operation switch 21 is turned on, the relay 27 is first turned on to energize the electric heating element 4 and preheat it. When preheating is completed, the relay 27 is turned off, and the igniter 28 is turned on.
At the same time, the combustion amount control means 12 outputs a constant pulse signal from the output section to the electromagnetic pump 3 to perform ignition and combustion.

Hereinafter, the operation during combustion will be explained using the flowchart of FIG. 5. First, in step 29, the combustion amount is calculated according to the difference between the room temperature detected by the room temperature detector 7 and the set temperature, that is, the pulse frequency output to the electromagnetic pump 3 is calculated. Step 29' converts the combustion amount calculated in step 29 into a combustion rate. Step 30 calculates the rotation speed of the blower 8 corresponding to the combustion amount calculated in step 29. Step 31 outputs the pulse frequency determined in step 29 from the output section to the electromagnetic pump 3. Step 32 performs input processing for the switches 16, 17, and 18, and the process branches at step 33 depending on the input status at step 32. That is, if the switch 16 is pressed, step 34 is processed, if the switch 18 is pressed, step 35 is processed, and if the switch 17 is pressed, the process immediately moves to step 36.

Steps 34 and 35 are for determining the correction amount corresponding to the combustion rate calculated in step 29'. For example, if the combustion rate is 55%, in step 34, the correction amount is -85 rpm,
In step 35, a correction amount of +20 rpm is obtained. Step 34' is the correction amount obtained in step 34 from the blower rotation speed obtained in step 30, that is, 95 rpm.
In step 35', the correction amount obtained in step 35, that is, 20 r, is added to the fan rotation speed obtained in step 3o.
Add prn. In step 36, the phase off time t corresponding to the fan rotation speed is determined from a correlation table between the phase off time t and the fan rotation speed set in advance, and in step 37, the phase off time t is outputted from the output section to the fan 8.

According to the configuration of the above embodiment, as shown in the relationship between the combustion amount on the horizontal axis and the fan rotation speed on the vertical axis in FIG. 6(a), it is possible to increase or decrease only the air flow amount without changing the combustion amount, This increase/decrease changes sequentially depending on the amount of combustion. Therefore, for example, if you want to keep the temperature of the hot air low, such as when there are children with sensitive skin nearby or in early spring, pressing the switch 18 will increase the amount of air blown without changing the amount of combustion, so you can lower the temperature of the hot air. On the other hand, if you want to spot-heat just your feet or quickly heat your cold body outdoors, you can achieve your goal by pressing the switch 16.

In addition, although the above embodiment was explained by increasing or decreasing the blower air volume, the same applies to increasing or decreasing the combustion amount.
It is possible to make more settings by increasing the number of switches instead of increasing and decreasing them one step at a time. Furthermore, if a variable resistor is used instead of a switch, the set value can be changed in an analog manner, allowing stepless setting. Further, in this embodiment, the correction that is sequentially changed according to the combustion amount has been explained using the seven stages shown in Table 1, but if it is set as a function for the combustion amount, even more fine-grained correction can be made. Furthermore, by changing the values of the correction amounts in Table 1, the relationship between the combustion amount and the air blowing amount can be set in various ways, for example, the relationships shown in FIG.

Effects of the Invention As described above, according to the hot air heater control device of the present invention, it is possible to automatically control the amount of combustion and the amount of air blown depending on the room temperature, and furthermore, it is possible to manually change only either the amount of combustion or the amount of air blown. This allows you to obtain the desired warm air temperature according to the feeling of use without compromising room temperature stability. In addition, with this invention, the amount of correction is increased or decreased sequentially, that is, gradually increased or decreased as the combustion amount changes, so there is no discomfort or discomfort caused by sudden changes in the amount of correction. This has the advantage of allowing you to obtain your preferred hot air temperature in a very natural way.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram of a control device for a warm air heater according to an embodiment of the present invention, FIG. 2 is a specific circuit diagram of the same essential parts, and FIG. Figure 4 is a graph showing the relationship between the blower rotation speed and phase off time, and Figure 5 is a flowchart explaining the operation during combustion.
Fig. 6 (@), (b) (C1 is a graph showing the relationship between the combustion amount and the rotation speed of the blower, Fig. 7 is a schematic configuration diagram showing the control device of a conventional hot air heater, and Fig. 8 The figure is the same control circuit diagram. 6... Combustor, 8... Blower, 11.
... Room temperature detection means, 12 ... Combustion amount control means, 13 ... Blower air volume control means, 15 ...
...Blower air volume correction means, 15'... Correction amount generation means, 16.17.18... Switch. Name of agent: Patent attorney Toshio Nakao and 1 other person @2
Figure 3 Figure 4 ν 4 #IA Lid 4 Mu

Claims (1)

[Claims] A combustor, a blower that sends air heated by the combustor into the room, a room temperature detection means that detects the temperature of the heated room, and a difference between the room temperature detected by the room temperature detection means and a preset temperature. A combustion amount control means for automatically changing the combustion amount using temperature as an input signal, a blower air volume control means for automatically changing the air blowing amount, a manual switch for instructing correction of the air blowing amount or the combustion amount, and the manual switch. A hot air heater comprising a correction amount setting means for sequentially changing the correction amount to be instructed according to the combustion amount, and a correction means for increasing or decreasing the air blowing amount or the combustion amount based on the output from the correction amount setting means. Machine control device.