JP2020186883A - Vaporization type combustion device - Google Patents

Abstract

To provide a vaporization type combustion device capable of accurately detecting an empty state of an oil feed tank.SOLUTION: A vaporization type combustion device includes: a body 1; a combustion part 2; an oil feed tank 26; an oil receiving pan 10 storing predetermined amount of fuel oil from the oil feed tank 26; an electromagnetic pump 11 supplying fuel oil in the oil receiving pan 10 to the combustion part 2; oil feed tank weight detection means 34; and a control device 3. The control device 3 determines that the oil feed tank 26 is in an empty state when an output value from the oil feed tank weight detection means 34 is unchanged during an operation of the electromagnetic pump 11, and thereby the empty state of the oil feed tank 26 can be detected accurately.SELECTED DRAWING: Figure 5

Description

The present invention relates to a vaporization type combustion device that vaporizes and burns fuel oil.

Conventionally, in this type of fuel, when the amount of fuel oil drops below a predetermined amount, an alarm is issued and the combustion of the combustion part is automatically stopped. (See, for example, Patent Document 1)

In addition, the amount of residual oil in the removable refueling tank is displayed on the main body of the device so that refueling can be performed before the amount of fuel drops below a predetermined amount and the combustion of the combustion part automatically stops. Some of them measure and display the weight of the refueling tank stored in the device with a weight sensor, and use the weight sensor to measure the weight of the refueling tank stored in the device and display the amount of residual oil in the refueling tank. When the amount of liquid fuel in the refueling tank is the weight specified by the kerosene amount display means, in order to be able to provide appropriate information corresponding to the weight, in advance in the manufacturing process stage of the heater. , The weight detection device reads the load when the refueling tank is fully filled with liquid fuel, and the signal from the weight detection device is stored in the storage device via the adjustment setting device for actual heating. When using the machine, some of them output the information calculated by the central control device to the kerosene amount display means based on the data stored in the storage device. (See, for example, Patent Document 2)

Utility Model Registration No. 2588169 Gazette Japanese Unexamined Patent Publication No. 11-94247

By the way, in this conventional one, for example, when the display means of the kerosene amount display means is full, medium, and small, a weight having the same weight as when the kerosene is filled in the refueling tank in advance at the factory is applied. When the weight is read by the weight detector, the weight is stored in the storage device as data via the adjustment setting device, and based on this set data, kerosene is consumed and the amount of kerosene decreases when combustion continues. , The weight including the refueling tank is detected by the weight detection device, the signal is input to the central control device, and when the weight is more than 2/3 of the total weight data, the full display is performed and 2 / of the total weight data. When it was less than 3 and more than 1/3 of the total weight, the inside was displayed, and when it was less than 1/3 of the total weight data, a small amount was displayed and the amount of residual oil was displayed. However, since the amount of residual oil, which is close to 1/3 of the total weight data, to the amount of empty residual oil are displayed in the same amount, it is only a rough guideline for the amount of residual hot water, and the refueling tank is empty. Could not be detected at all.

In order to solve the above problems, in the first aspect of the present invention, the main body, the combustion unit, the refueling tank, the oil pan for storing a predetermined amount of fuel oil from the refueling tank, and the fuel oil in the oil pan are described. In a vaporization type combustion device including an electromagnetic pump supplied to a combustion unit, a refueling tank weight detecting means, and a control device, the control device outputs the output of the refueling tank weight detecting means while the electromagnetic pump is operating. When the value does not change, it is determined that the refueling tank is empty.

Further, in claim 2, in claim 1, when the output value of the refueling tank weight detecting means is reduced to a predetermined value D, the control device refueling tank based on the output value of the refueling tank weight detecting means. It is for judging the empty state of.

Further, in claim 3, according to claim 1 or 2, the refueling tank detecting means for detecting whether or not the refueling tank is inside the main body is provided, and the control device is provided with the refueling tank detecting means for refueling. When the tank is changed from the state without the tank to the state with the tank, and the output value of the refueling tank weight detecting means is larger than the predetermined value D at that time, the empty state of the refueling tank is judged by the output value of the refueling tank weight detecting means. is there.

According to claim 1 of the present invention, when the output value of the refueling tank weight detecting means does not change while the electromagnetic pump is operating, it is determined that the refueling tank is empty, so that the refueling tank is empty. It is possible to accurately detect the state of.

Further, according to claim 2, when the output value of the refueling tank weight detecting means is reduced to a predetermined value D, the empty state of the refueling tank is determined based on the output value of the refueling tank weight detecting means, so that the refueling tank weight is determined. Even if the load cell of the detecting means is deformed downward, the state in which the load cell remains in contact with the oil pan is not mistakenly determined as the empty state of the refueling tank, and the refueling tank can be accurately loaded. It can detect the empty state.

Further, according to claim 3, a refueling tank detecting means for detecting whether or not the refueling tank is inside the main body is provided, and the control device is in a state where the refueling tank detecting means is present from the state without the refueling tank. When the output value of the refueling tank weight detecting means at that time is larger than the predetermined value D, the empty state of the refueling tank is judged based on the output value of the refueling tank weight detecting means, so that the refueling tank weight detecting means may be broken. , When the load cell of the refueling tank weight detection means is entangled with dust and the load cell does not displace, or when the refueling tank is inserted into the main body in an empty state, the fuel in the refueling tank is accurately changed from the state with fuel to the empty state. It is possible to prevent the refueling tank weight detecting means from detecting the empty state of the refueling tank in a state where it cannot be detected.

The perspective view which shows the vaporization type combustion apparatus which attached one Example of this invention. Sectional view of the main part. The main part block diagram. Block diagram of the control circuit. The same flowchart.

Next, one embodiment of the invention according to the present invention will be described with reference to the drawings.
Reference numeral 1 denotes a main body constituting a vaporization type combustion device installed indoors, a combustion unit 2 composed of a vaporization burner inside the main body 1, a control device 3 mainly composed of a microcomputer for controlling the operation of the main body 1. It is equipped with a convection blower 4 with an opening on the back of the main body 1, a hot air outlet 5 on the front of the main body 1, and an operation unit 6 on the upper front side of the main body 1, and uses the combustion exhaust gas from the combustion unit 2 for convection. Heating is performed by blowing air into the room from the warm air outlet 5 by the blower 4.

The combustion unit 2 is configured to include a vaporization unit 9 having a heating heater 8 in the lower part of a burner head 7 having a plurality of flame holes, and the oil pan 10 is inside the vaporization unit 9 heated by the heating heater 8. Liquid fuel is supplied through the oil supply nozzle 12 by driving the positive displacement electromagnetic pump 11, and the mixed gas of the vaporized gas vaporized by the liquid fuel and the combustion air supplied from the combustion blower 13 through the air passage 14 is used as described above. It is burned in the flame holes of the burner head 7, and during combustion, heat is recovered from the flame by an annular heat recovery ring 15 provided at the upper end of the vaporization unit 9 so as to face the plurality of flame holes, and the heating heater 8 is energized. It is reduced and has a wide turndown ratio and quiet vaporization combustion.

The operation unit 6 includes an operation switch 16 for instructing start / stop of operation, a room temperature setting means 19 composed of a room temperature rise switch 17 and a room temperature drop switch 18, and a room temperature setting means 19 for setting a desired room temperature, and an amount of residual oil. Various operation switches such as a display switch 20, a timer switch, and an extension switch, and a display unit 21 for displaying the time, set room temperature, and residual oil amount are provided.

Reference numeral 22 denotes a vaporization temperature sensor that detects the temperature of the vaporization unit 9 heated by the heater 8, and the control device 3 turns off the heater 8 when the detection temperature of the vaporization temperature sensor 22 reaches a predetermined upper limit temperature. Further, when the predetermined lower limit temperature is reached, the heating heater 8 is turned on to keep the temperature of the vaporizing unit 9 within a temperature range in which the liquid fuel can be satisfactorily vaporized.

Further, the control device 3 monitors the detected temperature of the vaporization temperature sensor 22 according to the operation command of the operation switch 16, and heats the vaporization unit 9 to a temperature at which the liquid fuel can be vaporized by the heating heater 8. When the temperature of 9 is raised to a temperature suitable for combustion, the electromagnetic pump 11 and the combustion blower 13 are started to be driven, the mixed gas is ignited by the ignition device 23 to start combustion, and the convection blower 4 on the back surface of the main body 1 is started. The electromagnetic pump 11 and the combustion blower 13 are controlled to change the combustion thermal power according to the deviation between the detected room temperature of the room temperature sensor 24 provided in the vicinity of the room temperature sensor 24 and the set room temperature set by the room temperature setting means 19. The room temperature is controlled so as to be set by the room temperature setting means 19.

Reference numeral 25 denotes a refueling tank detecting means, which detects whether or not the refueling tank 26 is inside the main body 1, and when the refueling tank 26 is inserted into the main body 1, it abuts on the side surface of the refueling tank 26 and closes the refueling tank 26. It is composed of an open / close switch that opens when it is pulled out from the main body 1, and when the tank detecting means 25 detects that the refueling tank 26 is pulled out from the main body 1 during operation, the control device 3 stops the operation.

When the refueling tank 26 is inserted into the main body 1, the mouthpiece 27 at the tip of the refueling tank 26 is inserted into the tank insertion port 28 formed in the oil pan 10.
An oil filter 29 for filtering impurities such as dust mixed in the fuel oil is arranged in the tank insertion port 28, and the base 27 of the oil supply tank 26 is inserted into the oil filter 29 to insert the base 27 of the oil supply tank 26 into the oil pan 10. The refueling tank 26 is mounted.

A pin 30 is formed so as to protrude from the center of the oil filter 29, and when the oil tank 26 is attached, the pin 30 opens the fuel discharge port 31 provided in the base 27 of the oil tank 26. The fuel oil in the oil supply tank 26 is supplied into the oil pan 10 via the oil filter 29.

Then, when the liquid level in the oil pan 10 rises and reaches the fuel discharge port 31, the supply of fuel oil from the refueling tank 26 is stopped. By repeating this, a constant amount of liquid is always supplied to the oil pan 10. It is designed to store fuel.

Reference numeral 32 denotes an oil amount detecting means including a float switch, which is provided in an oil pan 10 for temporarily storing fuel oil from the fuel tank 26. When the float switch is turned from OFF to ON, the fuel in the oil pan 10 is removed. It detects that the amount has fallen below a certain amount.

Reference numeral 33 denotes a timer means for counting a predetermined time, which starts timing by inputting a timing start signal from the control device 3 and ends timing by inputting a timing end signal, and is a predetermined time T1 from the start of timing. When it reaches, or when it reaches T2 for a predetermined time from the start of timekeeping, a timekeeping signal is output to the control device 3.

Reference numeral 34 denotes a refueling tank weight detecting means having a load cell, which is provided around the tank insertion port 28 of the oil pan 10, and when the refueling tank 26 is inserted into the main body 1 of the fan heater, the mouthpiece 27 at the tip of the refueling tank 26 becomes the oil. It is located at the tank insertion port 28 of the saucer 10, but at this time, the refueling tank 26 comes into contact with the load cell of the refueling tank weight detecting means 34, and the weight of the refueling tank 26 is brought into the load cell of the refueling tank weight detecting means 34. The load cell of the refueling tank weight detecting means 34 is displaced by the applied weight, and the output value B changes.

Next, the operation of this embodiment will be described with reference to the flowchart of FIG.
First, when the refueling tank detecting means 25 detects that the refueling tank 26 is present in the main body 1 of the fan heater and is not detected (S1), the control device 3 detects the weight of the refueling tank at that time. The output value B of the means 34 is set to the output value A in the absence of the refueling tank 26, and the zero point correction of the refueling tank weight detecting means 34 is performed (S2).

Then, when the refueling tank detecting means 25 changes from the state of detecting that the refueling tank 26 is not present in the main body 1 of the fan heater to the state of detecting that the refueling tank 26 is present (S3), the control device 3 detects the weight of the refueling tank at that time. Compare whether the output value B of the means 34 is larger than the predetermined value D obtained by adding the specified value d to the output value A (S4), and when the output value B is larger than the predetermined value D, based on the output value B. The amount of residual oil in the refueling tank 26 is displayed on the display unit 21 (S5).

Here, the specified value d is for starting the empty detection in the refueling tank 26 shortly before the refueling tank 26 becomes empty, and the output of the refueling tank weight detecting means 34 is added to the weight of the empty refueling tank 26. The error amount is also added.

Then, after displaying the amount of residual oil in the refueling tank 26 in (S5), it is detected whether the electromagnetic pump 11 is in the ON state (S7), and when the electromagnetic pump 11 is in the ON state, the number of discharges of the electromagnetic pump 11 is counted next. Then, when the predetermined number of times n is reached (S8), it is then detected whether the output value B becomes equal to the predetermined value D (S8).

Then, when the output value B becomes equal to the predetermined value D in (S8), the empty detection control of the refueling tank 26 is started, and first, the output value B of the refueling tank weight detecting means 34 at that time is stored as B1. (S9) Then, when the number of discharges of the electromagnetic pump 11 is counted and the number of discharges reaches a predetermined number of times n (S10), the output value B of the refueling tank weight detecting means 34 at that time is B2. Is memorized as (S11).

Here, when the load cell of the refueling tank weight detecting means 34 is deformed downward, when the refueling tank 26 that has been fully refueled is inserted into the main body 1, the load cell is oiled before being displaced by the weight. It comes into contact with the saucer 10.
That is, when the load cell is deformed downward, the amount of displacement is smaller than when the load cell is not deformed.
Therefore, even if the amount of oil in the refueling tank 26 that has been fully refueled by operating the electromagnetic pump 11 is reduced, the load cell remains in contact with the oil pan 10 and the refueling tank weight detecting means 34 The output value of is unchanged.
Then, as the amount of oil in the refueling tank 26 further decreases, the load cell separates from the oil pan 10 and changes in the restoration direction in response to the decrease in the amount of oil in the refueling tank 26.

Therefore, by starting the empty detection control of the refueling tank 26 after the output value B becomes smaller than the predetermined value D, even if the load cell of the refueling tank weight detecting means 34 is deformed downward, the load cell is still deformed. It is possible to accurately detect the empty state of the oil tank 26 without erroneously determining the state of being in contact with the oil pan 10 as the empty state of the oil tank 26.

Next, the B1 and B2 are compared, and when B1 and B2 are equal (S12), it is determined that the refueling tank 26 is empty (S13), and a refueling display is displayed on the display unit 21. .. (S14)

This means that B1 and B2 are equal, which means that the weight detected by the electromagnetic pump 11 is the same even though it is in the ON state, and the refueling tank weight detecting means 34 detects only the weight of the emptied refueling tank 26. It can be determined that the refueling tank 26 is in an empty state without fail.

Then, the control device 3 counts the number of discharges of the electromagnetic pump 11 after determining that the refueling tank 26 is empty in (S13), and when the number of discharges reaches the predetermined number N (S15). , The operation is stopped. (S16)

Further, when the output value B is equal to or less than the predetermined value D in (S4), the control device 3 determines that the oil tank weight detecting means 34 is abnormal (S17), and displays the abnormality on the display unit 21 (S18). ), The output value B of the refueling tank weight detecting means 34 does not control to determine that the refueling tank 26 is empty, and the oil amount detecting means 32 provided in the oil pan 10 causes the fuel oil in the oil pan 10 to be discharged. When it is detected that the amount is less than the predetermined amount (S19), the process proceeds to (S14) to display the refueling on the display unit 21.

Here, if the refueling tank 26 that has been normally refueled in (S4) is inserted into the main body 1, the output value B becomes larger than the predetermined value D, but the output value B is equal to or less than the predetermined value D. This is a case where the tank weight detecting means 34 is broken, the load cell of the refueling tank weight detecting means 34 is entangled with dust and the load cell is not displaced, or the refueling tank 26 is inserted into the main body 1 in an empty state. Since it is not possible to accurately detect that the fuel tank 26 has changed from the presence of fuel to the empty state, it is determined in (S17) that the weight detection means 34 of the fuel tank is abnormal.

Further, when the output value B is not equal to the predetermined value D in (S8), the process returns to (S5), and when the B1 and B2 are not equal in (S12), the oil tank is displayed on the display unit 21 based on the B2. The amount of residual oil in 26 is displayed (S20) and returns to (S9).

As described above, when the output value of the refueling tank weight detecting means 34 does not change while the electromagnetic pump 11 is operating, it is determined that the refueling tank 26 is empty. Therefore, the refueling tank 26 is in an empty state. It is possible to accurately detect that the pump has become.

Further, when the output value of the refueling tank weight detecting means 34 becomes smaller than the predetermined value D, the empty state of the refueling tank 26 is determined based on the output value of the refueling tank weight detecting means 34. When the load cell is deformed and the refueling tank 26 refueled is inserted into the main body 1, even if the load cell comes into contact with the oil pan 10 before being displaced by the weight, the empty state of the refueling tank 26 is detected. It can be done.

Further, a refueling tank detecting means 34 for detecting whether or not the refueling tank 26 is inside the main body 1 is provided, and the control device 3 changes the state in which the refueling tank detecting means 34 is present from the state without the refueling tank 26. When the output value of the refueling tank weight detecting means 34 at that time is larger than the predetermined value D, the empty state of the refueling tank 26 is determined based on the output value of the refueling tank weight detecting means 34. The fuel in the refueling tank 26 is accurately discharged when the fuel is broken, the load cell of the refueling tank weight detecting means 34 is entangled with dust and the load cell is not displaced, or when the refueling tank 26 is inserted into the main body 1 in an empty state. It is possible to prevent the refueling tank weight detecting means 34 from detecting the empty state of the refueling tank 26 in a state where it cannot be detected that the state has changed from the existing state to the empty state.

1 Main body 2 Combustion unit 3 Control device 10 Oil pan 11 Electromagnetic pump 26 Refueling tank 34 Refueling tank Weight detection means

Claims (3)

A main body, a combustion unit, a refueling tank, an oil pan for storing a predetermined amount of fuel oil from the refueling tank, an electromagnetic pump for supplying the fuel oil in the oil pan to the combustion portion, a refueling tank weight detecting means, In the vaporization type combustion device provided with the control device, the control device states that the refueling tank is emptied when the output value of the refueling tank weight detecting means does not change while the electromagnetic pump is operating. A vaporization type combustion device characterized by making a judgment. The first aspect of claim 1, wherein the control device determines the empty state of the refueling tank based on the output value of the refueling tank weight detecting means when the output value of the refueling tank weight detecting means is reduced to a predetermined value D. Vaporization type combustion device. A refueling tank detecting means for detecting whether or not the refueling tank is inside the main body is provided, and the control device provides the refueling tank detecting means when the refueling tank detecting means changes from the state without the refueling tank to the state with the refueling tank at that time. The vaporization type combustion apparatus according to claim 1 or 2, wherein when the output value of the weight detecting means is larger than the predetermined value D, the empty state of the refueling tank is determined based on the output value of the refueling tank weight detecting means.

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