JP5006225B2 - Hot air heater - Google Patents

Description

  The present invention relates to a hot air heater having a save operation function.

Conventionally, in this type of hot air heater, as a save operation to reduce fuel consumption, the save timer is operated without immediately lowering the set temperature of the save operation to the predetermined set temperature, and sequentially There is something to control to lower. (For example, see Patent Document 1)
Japanese Examined Patent Publication No. 2-51096

As another save operation, if there is a sudden room temperature change during the save operation in the air conditioner, the save operation is interrupted for a predetermined time or until the room temperature returns to the set temperature range, during which the compressor operating frequency and There are some which perform the normal operation that removes the restriction on the air volume of the indoor fan. (For example, see Patent Document 2)
Japanese Patent Laid-Open No. 10-9647

  By the way, in this conventional system, for example, in which the save timer is operated without immediately lowering the set temperature of the save operation to the predetermined set temperature, and the temperature is controlled stepwise, the temperature at which the fuel oil is burned and heated is controlled. In the case of wind heaters, the set temperature is not immediately lowered to the set temperature, so the amount of combustion gradually decreases. Therefore, the combustion amount of fuel oil must be actively suppressed until the set temperature drops to the set temperature. It was something that could not be done.

  Also, if there is a sudden room temperature change during the save operation, the save operation is interrupted for a predetermined time or until the room temperature returns to the set temperature range, during which the restrictions on the compressor operating frequency and the indoor fan air volume are released. In normal operation, the lower limit of the set temperature range is used as a boundary, and in some cases, the save operation and maximum output operation become extreme operation states, and in warm air heaters that heat by burning fuel oil, save operation and maximum It was supposed to be a thermal operation, and fuel oil was consumed at once.

  The present invention focuses on this point and solves the above-described problems. In particular, the present invention comprises a room temperature sensor for detecting the room temperature and switches such as an operation switch, a room temperature setting button, and a save operation switch. A burner and a heat exchanger are provided in a casing having an operation part, an air inlet and a hot air outlet, and a combustion part facing the burner and air sucked from the air inlet are heated by a heat exchanger to In a hot air heater equipped with a convection fan discharged from a wind outlet and a control unit for controlling the combustion amount of the combustion unit and the rotational speed of the convection fan so that the room temperature becomes the set temperature set by the operation unit. When the save operation switch of the operation unit is turned ON, the control unit sets the set temperature of the room temperature to the save operation set temperature, and sets the maximum heating power of the burner smaller than the maximum heating power during normal heating operation. And save operation by fluctuation control that periodically lowers the set temperature. When the room temperature becomes lower than the first lower limit temperature lower than the save operation set temperature during the save operation, the maximum heating power of the burner is set to normal heating operation. When the indoor temperature becomes lower than the second lower limit temperature lower than the first lower limit temperature, the set temperature of the indoor temperature is set to the maximum temperature.

  Further, in the warm air heater according to claim 2, particularly in the control device of the heater according to claim 1, when the save operation switch of the operation unit is turned ON, the control unit saves the room temperature at that time. When the temperature is above the fire extinguishing temperature, heating operation is stopped until the room temperature falls to the save operation set temperature, and when the room temperature falls to the save operation set temperature, the save operation is started and the room temperature is saved during the save operation. When the temperature falls below the first lower limit temperature lower than the set temperature, the maximum heating power of the burner is set to the maximum heating power during normal heating operation, and then the maximum heating power of the burner is set when the room temperature exceeds the first lower limit temperature. When the save operation is restarted by setting it smaller than the maximum heating power during normal heating operation, the maximum heating power of the burner is normally set when the room temperature falls below the second lower limit temperature which is lower than the first lower limit temperature during the save operation. Set the indoor temperature to the maximum temperature while setting the maximum thermal power during heating operation, and then set the maximum thermal power of the burner to the maximum thermal power during normal heating operation when the indoor temperature exceeds the second lower limit temperature. The room temperature set temperature is set to the save operation set temperature, and when the room temperature exceeds the first lower limit temperature, the maximum heating power of the burner is set smaller than the maximum heating power during normal heating operation and the save operation is restarted. Is.

  According to the first aspect of the present invention, the set temperature of the room temperature is set to the save operation set temperature, the maximum heating power of the burner is set to be smaller than the maximum heating power during normal heating operation, and the set temperature is periodically lowered. When the room temperature falls below the first lower limit temperature, which is lower than the save operation set temperature, during the save operation by control, the burner's maximum heating power is set to the maximum heating power during normal heating operation, and the room temperature is the first lower limit temperature. When the temperature falls below the second lower limit temperature lower than the temperature, the set temperature of the room temperature is set to the maximum temperature. Therefore, when the temperature range where the save operation is performed deviates to the low temperature side, the degree of deviation is small. Set the maximum heating power of the burner to the maximum heating power during normal heating operation while keeping the temperature at the save operation setting temperature so that the room temperature returns to the temperature range where save operation is performed, and when the degree of deviation is large, -Since the maximum heating power of the heater is set to the maximum heating power during normal heating operation, and the set temperature is set to the maximum temperature, the room temperature returns to the temperature range where the save operation is performed more quickly. While reducing consumption, when the room temperature suddenly drops, the room temperature is rapidly increased to quickly eliminate the cold state.

  According to the hot air heater of claim 2 of the present invention, when the save operation switch of the room operation unit is turned ON, when the room temperature at that time is equal to or higher than the save fire extinguishing temperature, the room temperature is the save operation. Heating operation is stopped until the temperature falls to the set temperature, and when the room temperature drops to the save operation set temperature, the save operation is started, the temperature set temperature is set to the save operation set temperature, and the burner's maximum heating power is set to the normal temperature. When the room temperature is lower than the first lower limit temperature, which is lower than the set temperature for saving, during the saving operation by fluctuation control, which is set lower than the maximum heating power during heating operation and periodically lowers the set temperature, the maximum heating power of the burner is set. Set to the maximum heating power during normal heating operation Save operation When the temperature exceeds the set temperature, set the maximum heating power of the burner to be smaller than the maximum heating power during normal heating operation and restart the save operation. When the temperature becomes lower than the second lower limit temperature, which is lower than the first lower limit temperature, the set temperature of the indoor temperature is set to the maximum temperature while setting the maximum thermal power of the burner to the maximum thermal power during normal heating operation, and then the indoor temperature is When the lower limit temperature is exceeded, the set temperature of the room temperature is set to the save operation set temperature while the maximum heating power of the burner is set to the maximum heating power during normal heating operation, and the room temperature becomes higher than the first lower limit temperature. At this time, the maximum heating power of the burner is set smaller than the maximum heating power during normal heating operation, and the save operation is restarted.When the room temperature is high, the save operation is not executed and the combustion is stopped and the extra fuel consumption is reduced. When the room temperature deviates from the temperature range where save operation is performed to the low temperature side, the maximum heating power and set temperature of the burner are changed according to the degree of deviation, and the room temperature quickly returns to the temperature range where save operation is performed. To do In addition, when the degree of deviation is from a large state to a small state, the set temperature of the room temperature is set from the maximum temperature to the save operation set temperature so that the room temperature quickly returns to the temperature range where the save operation is performed. However, the consumption of fuel oil can be suppressed by reducing the combustion amount as much as possible according to the degree of departure.

Next, an embodiment of the present invention will be described with reference to the drawings.
1 is an apparatus main body of a warm air heater, a top plate 2 provided with various buttons and a display unit, a back plate 4 formed with a circular air suction port 3 and an exhaust hole (not shown), It consists of left and right side plates 5 and 6, a bottom plate 7 on the bottom surface, a front panel 9 provided with a hot air outlet 8, and a leg 10 provided at a corner of the bottom surface of the bottom plate 7. It is installed indoors in a state where a space 12 is formed between the bottom plate 7 and the table 11.

  Reference numeral 13 denotes a tank heat shield plate having a substantially L-shaped cross section. The tank heat shield plate 13, the back plate 4, and the right side plate 6 form a storage space for a cartridge-type tank 14 that is detachably stored. The oil tank 15 is provided at an upper portion of the oil tray 15 for storing a certain amount of fuel supplied from the cartridge type tank 14.

  Reference numeral 16 denotes a combustion section that surrounds a combustion flame and a burner 19 that vaporizes the fuel sent from the oil tray 15 by the fuel pump 17 and mixes and burns the combustion air blown from the combustion air blower 18. The outer cylinder 20 for guiding the high-temperature exhaust gas generated by combustion is integrated, and the opening of the burner 19 is fixed to the burner mounting base 21, and further, one end of the outer cylinder 20 is fixed to the burner mounting base 21. It is what has been.

  Reference numeral 22 denotes a heat exchanger, which is an air that is blown from the heat of the exhaust gas by passing the high-temperature exhaust gas that is communicated with the combustion unit 16 and guided by the outer cylinder 20 through the meandering exhaust gas passage. A heat exchanger 23 that efficiently exchanges heat, a relay heat exchanger 24 that connects the heat exchanger 23 and the outer cylinder 20 of the combustion section 16, and an exhaust pipe fitting 25 in an exhaust hole formed in the back plate 4. The exhaust pipe 26 having one end fixed from the inside of the device main body 1 is connected to the other end of the exhaust pipe 26 to be connected to exhaust the exhaust gas from the device main body 1, and is integrated with the combustion unit 16. In this state, it is detachably fixed in the device main body 1.

  Reference numeral 28 denotes a convection fan, which includes a propeller fan whose diameter is slightly smaller than the diameter of the air suction port 3 of the back plate 4 and a blower motor (not shown) for rotating the propeller fan. The center of the convection fan 28 is the back plate 4. It is fixed to the outside of the back plate 4 so as to coincide with the center of the air inlet 3.

A unit attachment plate 29 is attached to the upper surface of the bottom plate 7, and the integrated combustion unit 16 and heat exchanger unit 22 are detachably fixed to the attachment surface.
The combustion unit 16 includes a temperature detection unit 30 including a thermistor sensor and the like, and the fuel pump 17 and the combustion air blower 18 are controlled according to the detection value of the temperature detection unit 30, and at the time of power failure recovery and operation. Operation control of the convection fan 28 at the time of re-operation after the stop is performed.

Reference numeral 31 denotes a control unit formed of a printed circuit board or the like. An operation unit 35 including switches such as an operation switch 32, a room temperature setting button 33, and a save operation switch 34 on the input side, the temperature detection unit 30, the room temperature sensor 36, and the like. These sensors are connected, and on the output side, a convection motor 37 that drives the fuel pump 17, the combustion air blower 18, and the convection fan 28, and a display unit 38 that displays the operation state by lamps or the like are connected.
Reference numeral 39 denotes a power supply detection unit provided in the control unit 31 for confirming the presence or absence of a power supply when a power failure is restored or a power plug (not shown) is inserted.

Next, the heating operation of this hot air heater will be described.
First, when the operation switch 32 provided on the top plate 2 is pressed, an operation operation is started, the heater of the burner 19 is energized to increase the temperature, and the temperature of the temperature detection unit 30 provided in the burner 19 is preset. When the temperature rises, the fuel oil is supplied from the fuel pump 17 to the burner 19, and the combustion air is supplied from the combustion air blower 18 to the burner 19, whereby the fuel oil and the combustion air are premixed in the burner 19. As a result, the air-fuel mixture is ignited at the upper part of the burner 19 and blown out from a flame hole portion (not shown) located in the outer cylinder 20 to start combustion.

  The convection fan 28 operates simultaneously with the start of combustion, and the air blown by the convection fan 28 passes through the air suction port 3 of the back plate 4 from the back of the device body 1 and exchanges heat with the heat exchanger 23. The hot air is blown out from the hot air outlet 8 of the front panel 9.

  The combustion is controlled so that the room temperature detected by the room temperature sensor 36 becomes the set temperature set by the room temperature setting button 33.

Next, the operation of the save operation will be described with reference to the flowchart of FIG.
First, when the save operation switch 34 is turned on (S1), it is confirmed whether the heating operation is being performed (S2). If the heating operation is being performed, it is next confirmed whether the room temperature is 20 ° C. or more of the save operation set temperature. (S3)

And if room temperature is 20 degreeC or more of save operation preset temperature, a save operation will be started. (S4)
First, in order to start the save operation, the set temperature of the room temperature is set to the save operation set temperature of 20 ° C., and the maximum heating power of the combustion heat in the burner 19 is set to 60% of the maximum heating power in the normal heating operation. To do. (S5)
As a result, the set temperature is set to a lower temperature, and the maximum thermal power is set to 60% of the maximum thermal power during normal heating operation, thereby suppressing fuel consumption.

Next, check that the room temperature is less than 23 ° C, the save fire extinguishing temperature. (S6)
This is because the room temperature is still too high to perform the save operation, and the combustion is stopped and the consumption of fuel oil is suppressed until the room temperature is lowered to a temperature suitable for the save operation.

  When the room temperature is 23 ° C. or higher in (S6), the heating operation is stopped (S7), the room temperature is detected to be 20 ° C. or less of the save operation set temperature (S8), and the room temperature is 20 ° C. or less. Then, the heating operation is started again (S9), and the process returns to (S4).

In addition, when the room temperature is less than 23 ° C. in (S6), the heating operation is controlled to fluctuate. (S10) This fluctuation control is a control that periodically lowers the set temperature while keeping the sensible temperature from lowering to the save operation set temperature of 20 ° C. In this embodiment, the fluctuation control is performed to the save operation set temperature of 20 ° C. 18 ° C., which is 2 ° C. lower, is set to the set temperature at intervals of 20 minutes.
Thereby, the combustion amount of the fuel oil can be suppressed without lowering the sensible temperature, and energy saving can be achieved.

When the fluctuation control is performed in (S10), it is confirmed whether the room temperature is lower than 15 ° C. which is the first lower limit temperature. (S11)
When the room temperature is above the first lower limit temperature of 15 ° C. in this (S11), the process returns to (S4), and when the room temperature is less than the first lower limit temperature of 15 ° C., the fluctuation control is stopped (S12), 60% to 100% of the maximum heating power during normal heating operation is set (S13), and the heating operation is performed.

  The first lower limit temperature is a temperature at which the perceived temperature decreases and the cold temperature is felt when the room temperature becomes lower than this temperature. The first lower limit temperature exceeds the lower limit of the temperature range in which the save operation is performed, and the room temperature falls below the first lower limit temperature. Then, the save operation is temporarily stopped, the room temperature is quickly raised to the first lower limit temperature at the maximum heating power of 100%, and the save operation is performed again.

Next, it is confirmed whether the room temperature is less than 10 ° C. which is the second lower limit temperature. (S14)
When the room temperature is 10 ° C. or more, which is the second lower limit temperature in (S14), the process returns to (S11), or when the room temperature is less than 10 ° C., which is the second lower limit temperature, in step (S14) Since it is judged that the temperature has decreased, the set temperature is set from 20 ° C. of the save operation set temperature to 30 ° C. which is the set maximum temperature (S15), and then returns to (S14). The heating operation is continued in that state until the above is reached.
As a result, the temperature difference between the room temperature and the set temperature is maximized, and the room temperature is rapidly increased to quickly eliminate the cold state.

  In this embodiment, the first lower limit temperature is set to 15 ° C. and the second lower limit temperature is set to 10 ° C. However, the present invention is not limited to this, and the first lower limit temperature is defined as the first lower limit temperature difference. When the difference in room temperature becomes −10 ° C. or more, the process proceeds from (S11) to (S12), and the second lower limit temperature is set as the second lower limit temperature difference, for example, when the difference between the set temperature and room temperature becomes −15 ° C. or more (S14). ) To (S16).

The perspective view which shows the warm air heater which attached | subjected one Example of this invention. The front view which shows the inside in the apparatus main body. Schematic of the control unit. The flowchart figure at the time of the said save driving | operation.

Explanation of symbols

19 Burner 28 Convection Fan 30 Temperature Detection Unit 31 Control Unit 32 Operation Switch 33 Room Temperature Setting Button 34 Save Operation Switch 35 Operation Unit 36 Room Temperature Sensor 39 Power Supply Detection Unit

Claims (2)

  A burner and a heat exchanger are provided in a casing having a room temperature sensor for detecting the room temperature, an operation unit having switches such as an operation switch, a room temperature setting button, and a save operation switch, and an air inlet and a hot air outlet. The combustion section facing the burner, the convection fan that heats the air sucked from the air inlet through a heat exchanger and exhausts it from the hot air outlet, and the room temperature is set to the set temperature set by the operating section In the hot air heater having a control unit for controlling the combustion amount of the combustion unit and the rotational speed of the convection fan, the control unit sets the set temperature of the room temperature when the save operation switch of the operation unit is turned ON. In addition to setting the save operation set temperature, the burner's maximum heating power is set smaller than the maximum heating power during normal heating operation, and the save operation is performed by fluctuation control that periodically lowers the set temperature. When the room temperature falls below the first lower limit temperature that is lower than the save operation set temperature, the maximum heating power of the burner is set to the maximum heating power during normal heating operation, and the room temperature is lower than the first lower limit temperature. A hot air heater characterized in that when the temperature falls below the lower limit temperature, the set temperature of the room temperature is set to the maximum temperature.   When the save operation switch of the operation unit is turned ON, the control unit stops the heating operation until the room temperature falls to the save operation set temperature when the room temperature at that time is equal to or higher than the save fire extinguishing temperature. The save operation starts when the temperature reaches the save operation set temperature, and when the room temperature falls below the first lower limit temperature lower than the save operation set temperature during the save operation, the burner's maximum heating power is set to the maximum heating power during normal heating operation. After that, when the room temperature reaches the first lower limit temperature or higher, the maximum heating power of the burner is set smaller than the maximum heating power during normal heating operation and the save operation is restarted. When the temperature becomes lower than the second lower limit temperature lower than the first lower limit temperature, the set temperature of the indoor temperature is set to the maximum temperature while setting the maximum thermal power of the burner to the maximum thermal power during normal heating operation, and then the indoor temperature When the second lower limit temperature is exceeded, the set temperature of the room temperature is set to the save operation set temperature while the maximum heating power of the burner is set to the maximum heating power during normal heating operation, and the room temperature becomes higher than the first lower limit temperature. The hot air heater according to claim 1, wherein the maximum heating power of the burner is set smaller than the maximum heating power during normal heating operation, and the save operation is restarted.

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