JP3967277B2 - Set temperature control device for heating appliance - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a temperature control device for a heating appliance that is safe for an infant or the like when heating a room or the like.
[0002]
In connection with this type of temperature control device for a heating appliance, Patent Literature 1 discloses a hot water temperature setting device for a water heater. The hot water temperature setting device for a hot water heater disclosed in Patent Document 1 includes an up switch that raises the set temperature, a down switch that lowers the set temperature, and a hot water temperature that sequentially changes the set temperature in response to pressing of the up and down switches. And a hot water temperature display unit for digitally displaying the set temperature, and the hot water temperature changing means continuously changes the set temperature in the rising direction within a predetermined range on the high temperature side for a predetermined time or more of the up switch. In the set temperature range from 55 ° C to 70 ° C which is the high temperature side of the hot water temperature, the set temperature can be changed unless the up switch is pressed for a certain period of time. The temperature setting is inadvertently changed to prevent the risk of burns.
[0003]
[Patent Document 1]
Japanese Patent Laid-Open No. 9-318152 (see paragraphs 0004 to 0005)
[0004]
[Problems to be solved by the invention]
By the way, in the above-mentioned patent document 1, the set temperature cannot be changed unless the up switch is continuously pressed for a certain time by the regulating means in the set temperature range on the high temperature side, but the up switch is pressed from the low temperature side than the set temperature range. If you continue to do so, it will be possible to change the set temperature by entering the set temperature range on the high temperature side, so the set temperature will continue to rise even if the child keeps pushing accidentally and carelessly. Is not yet complete in terms of
[0005]
In view of the above, the present invention intends to provide a safer set temperature control device for a heating appliance so as not to exceed the reference temperature even if the up switch is continuously pressed from the lower temperature side than the reference temperature. It is.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, a set temperature control device for a heating appliance according to the present invention includes an up switch for increasing a set temperature, a down switch for decreasing the set temperature, and input signals from the up switch and the down switch. In a set temperature control device for a heating appliance that changes a set temperature, a set temperature determination unit that determines whether or not the set temperature has reached a prestored reference temperature, and input conditions from switches such as the up switch And an input condition determination unit that changes the set temperature based on the determination results of the set temperature determination unit and the input condition determination unit, and the set temperature change unit is higher than the reference temperature. On the other hand, unless a special condition is input to the input condition determination unit, the ON signal input from the up switch is processed as invalid. It is.
[0007]
According to the above configuration, even if the up switch continues to be input continuously or intermittently until the reference temperature is reached, if the reference temperature is reached, the input of the up switch is disabled unless there is input from the switches under special conditions. Therefore, even if the child keeps pressing the up switch carelessly, the set temperature can be prevented from being set to the reference temperature or higher, and safety can be ensured.
[0008]
In addition, as reference temperature, although temperature (for example, 22 degreeC) lower than predetermined maximum setting temperature (for example, 30 degreeC) can be illustrated, it is not limited to this.
[0009]
Further, in the set temperature changing unit, after a special condition is input to the input condition determination unit on the higher temperature side than the reference temperature, the ON signal from the up switch on the lower temperature side than the reference temperature is different from the ON condition. Only when the ON signal is input, the ON signal from the up switch can be processed as valid.
[0010]
According to this configuration, even after clearing the special conditions, in order to make the input from the up switch function as an effective one, a condition different from the input condition of the up switch before reaching the reference temperature is imposed, More safety can be ensured.
[0011]
For example, the set temperature changing unit treats it as effective when the ON signal from the up switch is continuously input beyond the first reception time on the lower temperature side than the reference temperature. When the ON signal from the up switch is continuously input beyond the second reception time longer than the first reception time on the higher temperature side, it can be processed as effective.
[0012]
Further, the set temperature changing unit processes that the special condition is satisfied when an OFF signal from the up switch is continuously input to the input condition determining unit for a predetermined time on the higher temperature side than the reference temperature. be able to.
[0013]
According to this configuration, when the up switch is continuously pressed, the set temperature increases. However, even if the up switch is continuously pressed when the reference temperature is reached, this is invalidated and temporarily stopped. Then, when a predetermined time elapses after the finger is removed from the up switch, it is assumed that the special condition is cleared, and the set temperature can be raised to the high temperature side when it is continuously pressed again. Accordingly, it is possible to provide a heater with higher safety.
[0014]
Further, the set temperature changing unit is assumed to satisfy a special condition when an ON signal from a special switch provided separately from the up switch is input to the input condition determining unit at a higher temperature than the reference temperature. It can also be processed.
[0015]
According to this configuration, in the same way as described above, even if the up switch is kept pressed, it stops once when it reaches the reference temperature and does not rise any further. It becomes possible only after pressing. If the up switch is not pressed again, the set temperature cannot be raised to the high temperature side. Accordingly, it is possible to provide a heater with higher safety.
[0016]
Note that the temperature setting higher than the reference temperature is effective when the special switch is pressed once or multiple times, and the ON signal from the up switch is processed as effective thereafter. Alternatively, the ON signal from the up switch may be processed as valid only when the special switch is kept pressed, that is, only when the ON signal from the special switch is input. .
[0017]
Here, the special switch is not particularly limited, but if it is also used as a switch for setting and / or canceling the temperature setting mode, the number of switches can be reduced.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of an oil fan heater equipped with a liquid fuel combustion device will be described with reference to the drawings as a heating appliance according to the present invention. FIG. 1 is a front perspective view of an oil fan heater equipped with a liquid fuel combustion apparatus, and FIG. 2 is a side sectional view of the same.
[0019]
In FIG. 1, 1 is an instrument main body, 2 is a hot air outlet to which a louver for guiding warm air is attached, 3 is an operation display unit disposed on the front side of the upper surface of the main body, 4 is a variable louver, and 5 is a body lid. This is a refueling tank. The exterior body of the instrument body 1 is configured such that a front panel 7 covering the front surface, an upper surface plate 8 covering the upper surface, and a rear surface plate 9 covering the side surfaces and the rear surface are fixed on the mounting table 10.
[0020]
In FIG. 2, 11 is a convection fan as a blowing means attached to the hot air intake on the back side of the instrument body, 12 is a fan motor of the convection fan, 13 is an air intake provided on the back of the instrument body 1, 14 is a combustion chamber, and 15 is a burner below the combustion chamber. The combustion chamber 14 and the burner 15 constitute a heat generating portion of the hot air blowing type heating appliance. The heating capacity of the heat generating portion is changed by controlling each component of the fuel path shown in FIG.
[0021]
FIG. 3 is a schematic view of the fuel path. In FIG. 3, 5 is a fuel tank that can be removed from the main body, 19 is an ignition heater, 20 is a flame sensor as flame detection means disposed above the burner, 21 is an electromagnetic pump as a pump for sending fuel in the fuel tank, 22 Is a vaporizer that heats the fuel from the electromagnetic pump to turn it into vaporized gas, and 15 is a burner that jets vaporized gas from the vaporizer through a nozzle, mixes it with combustion air, and burns it. Although not shown, the vaporizer 22 is provided with a solenoid valve that opens and closes the nozzle and a vaporizer heater that heats the vaporizer.
[0022]
Reference numeral 24 denotes a first (oil feeding side) connecting means for connecting the fuel tank 5 and the combustion section when the fuel tank is mounted on the main body, and includes a tank-side connection joint 24a and a combustion joint-side connection joint receiver 24b. Consists of Reference numeral 25 denotes a second (return oil side) connecting means for connecting the oil tank and the vaporizer and returning the unburned gas to the oil tank 5 when the oil tank is attached to the main body, and the tank side connection joint 25a. And a connection joint receiver 25b on the combustion part side.
[0023]
The oil supply side connecting means 24 is provided with an air valve 26 for sending air into the path. The air valve 26 is driven to open and close by a solenoid. Further, a pipe 27 is provided between the first connecting means 24 and the electromagnetic pump 21 of the fuel tank 5, a pipe 28 is provided between the electromagnetic pump 21 and the vaporizer 22, and a return oil is provided between the vaporizer 22 and the second connecting means 25. They are connected by a pipe 29.
[0024]
In the oil fan heater having the above configuration, the liquid fuel accommodated in the fuel tank 5 is guided to the vaporizer 22 via the oil feed pipe 28 by the electromagnetic pump 21 for fuel pressure feeding, and the vaporizer provided in the vaporizer 22 is provided. The supplied liquid fuel is vaporized by a heater (not shown). The fuel gas vaporized by the carburetor 22 is jetted vigorously from the nozzle, introduced into the burner 15 together with combustion air, and combusted at the flame port, and the air in the combustion chamber is heated.
[0025]
Then, as shown in FIG. 2, the convection fan 11 attached to the fan motor 12 provided on the back of the main body warms the indoor air sucked through the filter together with the heated air and combustion gas in the combustion chamber 14. It blows out into the room from the outlet 2 as wind.
[0026]
On the other hand, the frame sensor 20 provided slightly above the flame outlet detects a flame current caused by the combustion flame. When a flame current exceeding a preset value is detected, the fan motor 12 is energized, and accordingly the convection fan 11 is energized. Rotates, and the air sucked from the room is blown into the room from the air outlet 2 as warm air.
[0027]
At this time, the room temperature thermistor (not shown) detects the room temperature, and the control unit 30 (see FIG. 5) controls the drive of the electromagnetic pump 21 for fuel pumping based on the temperature difference between the room temperature and the set temperature. The amount of liquid fuel supplied to the vaporizer 22 is adjusted, the heating power of the combustion flame in the burner 15 is adjusted, and the heating capacity is controlled.
[0028]
For example, if the operation of the oil fan heater is started when the room temperature is low, the supply amount of the liquid fuel to the vaporizer 22 is increased to rapidly increase the room temperature to the set temperature, and then the supply amount of the liquid fuel is adjusted. Around the set temperature-to keep it constant.
[0029]
FIG. 4 is a schematic diagram of an operation display unit that performs temperature setting and the like. The operation display unit 3 includes an operation unit 3a and a display unit 3b. The operation unit 3a includes an operation switch 31, an extension switch 32 that can extend the combustion time by 3 hours, a selection switch 33 that can select various modes, a setting / release switch 34 that sets and releases the selected mode, and a reference temperature release switch 35. An up switch 36 and a down switch 37 are arranged.
[0030]
The reference temperature release switch 35 is a special switch that is pressed when the set temperature is raised above a prestored reference temperature (for example, 22 ° C.). The reference temperature is stored in advance by the manufacturer as a temperature lower than the maximum set temperature (for example, 33 ° C.). The up switch 36 and the down switch 37 are used to sequentially change the set temperature and time (or time) by pressing when setting the temperature and timer.
[0031]
The display unit 3b includes “energy saving”, “small room”, “quick / warm”, “speed ignition”, “timer time”, “setting”, “temperature”, and a 4-digit number display unit for displaying time and temperature. A liquid crystal display 38 is displayed, and the corresponding display is lit or blinks depending on the setting of various modes.
[0032]
FIG. 5 is a block diagram showing the configuration of the temperature setting control apparatus according to the present invention, and FIG. 6 is a control flowchart in the temperature setting mode. In FIG. 5, components not directly related to the present invention are not shown.
[0033]
The control unit 30 is configured by a general microcomputer, and includes a CPU, a ROM, and a RAM inside, and special switches such as an up switch 36, a down switch 37, and a reference temperature release switch 35 are connected to the input side. . The control unit 30 receives input conditions from a set temperature determination unit 41 that determines whether or not the set temperature has reached a prestored reference temperature, and switches 35, 36, and 37 such as an up switch. An input condition determining unit 42 for determining and a set temperature changing unit 43 for changing the set temperature based on the determination results of the set temperature determining unit and the input condition determining unit are provided.
[0034]
Various drive systems 45 such as the electromagnetic pump 21 and the convection fan 11 are connected to the output side of the control unit 30, and the operation display unit 3 that displays a set temperature and the like is connected.
[0035]
Next, the set temperature control in the temperature setting mode will be described based on the control flowchart of FIG. In the control flow of FIG. 6, “special conditions” “
The logic of “predetermined conditions” and “different conditions” can be determined by continuous or intermittent signals from the switches, and is originally a complicated flow, but is simplified for easy understanding of the principle of the present invention. Shows the flow.
[0036]
In FIG. 5, the temperature setting mode is completed by pressing the setting / release switch 34 after selecting the temperature setting mode from various setting modes by sequentially pressing the selection switch 33.
[0037]
For example, when the up switch 36 is pressed after entering the temperature setting mode (S10), the signal is input to the control unit 30, and the set temperature determination unit 41 compares the current set temperature with the reference temperature, It is determined whether or not the set temperature exceeds the reference temperature (S11).
[0038]
When the current set temperature is lower than the reference temperature, the input condition determination unit determines whether or not the input ON signal of the up switch 36 satisfies a predetermined condition (S12). For example, it is determined whether or not the ON signal of the up switch 36 has been continuously pressed for a first reception time (for example, 1 second). If it is pressed for the first reception time or longer, the set temperature changing unit makes this signal valid and raises the current set temperature by a predetermined temperature (for example, 0.5 ° C. or 1 ° C.) (S13), and the drive system Outputs the instruction signal.
[0039]
When the ON signal from the up switch 36 is continuously input, the process returns to the top of the temperature setting mode, and the above processing is repeated to raise the current set temperature to a predetermined temperature. If the ON signal of the up switch 36 is less than the first reception time T1, it is assumed that the switch has been inadvertently pressed, the input is invalidated (S14), and the process ends.
[0040]
When the current set temperature is equal to or higher than the reference temperature, the input condition determination unit determines whether or not the input ON signal such as the up switch 36 satisfies a special condition (S15). For example, when an ON signal is input from a reference temperature release switch 35 provided separately from the up switch 36, it can be processed as satisfying a special condition.
[0041]
As another aspect, when the OFF signal from the up switch is continuously input for a predetermined time, for example, when the up switch 36 is continuously pressed to reach the reference temperature, the finger is temporarily moved from the up switch 36. When it is separated and turned off for a predetermined time, it can be processed as satisfying a special condition.
[0042]
Unless such special conditions are satisfied, the temperature cannot be set above the reference temperature, and the set temperature is prevented from being raised carelessly. If the special condition is satisfied, it is next determined whether or not the ON signal input from the up switch 36 satisfies a different condition (S16). For example, on the lower temperature side than the reference temperature, the current set temperature is assumed to be effective when an ON signal from the up switch 36 is continuously input exceeding a first reception time T1 (for example, 1 second). A process for raising the temperature by a predetermined temperature is performed. On the higher temperature side than the reference temperature, the ON signal from the up switch 36 continuously exceeds a second reception time T2 (for example, 3 seconds) longer than the first reception time T1. When it is input, a process of raising the present set temperature to a predetermined temperature as the first effective one is performed (S17).
[0043]
In this case, the temperature setting higher than the reference temperature is effective when the special switch is pressed once or multiple times, and the ON signal from the up switch is processed as effective thereafter. The ON signal from the up switch may be processed as valid only when the special switch is kept pressed, that is, only when the ON signal from the special switch is input. Good.
[0044]
If special conditions or different conditions are not satisfied in steps S15 and S16, these signals are invalidated (S18) and the process ends.
[0045]
As described above, in this embodiment, when the set temperature is to be increased on the higher temperature side than the reference temperature, unless a special condition is input, a condition different from the condition on the lower temperature side than the reference temperature is input. Since it cannot be set unless there is, the preset temperature cannot be raised carelessly, and a safer preset temperature control device can be provided.
[0046]
In addition, this invention is not limited to the said embodiment, Of course, correction and a change can be added within the scope of the present invention. For example, in the above-described embodiment, the oil fan heater is illustrated with the vaporization type liquid fuel combustion device mounted thereon, but the present invention can be applied not only to other types of oil fan heaters but also to other heating appliances. Of course. Further, as a special switch, it can also be used as a switch for setting and / or canceling the temperature setting mode.
[0047]
【The invention's effect】
As is clear from the above description, according to the present invention, if the reference temperature is reached even if the up switch is continuously or intermittently input until the reference temperature is reached, unless there is an input from the switches under special conditions, Since the input of the up switch is disabled, even if a child keeps pressing the up switch carelessly, the set temperature can be prevented from being set above the reference temperature, ensuring safety. Can do.
[Brief description of the drawings]
1 is a front perspective view of an oil fan heater equipped with a liquid fuel combustion apparatus according to an embodiment of the present invention. FIG. 2 is a side sectional view of FIG. 1. FIG. 3 is a schematic view of a fuel path of FIG. 4 is a schematic diagram of the operation display unit in FIG. 1. FIG. 5 is a block diagram of the configuration of the temperature setting control device in FIG. 1. FIG. 6 is a schematic control flowchart in a temperature setting mode.
DESCRIPTION OF SYMBOLS 1 Instrument main body 2 Hot air outlet 3 Operation display part 4 Variable louver 5 Oil supply tank 11 Convection fan 12 Fan motor 13 Hot air inlet 14 Combustion chamber 15 Burner 19 Ignition heater 20 Flame sensor (flame detection means)
21 Electromagnetic pump (oil feed pump)
22 Vaporizer 24 1st connection means 25 2nd connection means 30 Control part 33 Selection switch 34 Setting / release switch 35 Reference temperature release switch 36 Up switch 37 Down switch 41 Set temperature judgment part 42 Input condition judgment part 43 Set temperature Change part

Claims (2)

In an up switch that raises the set temperature, a down switch that lowers the set temperature, and a set temperature control device for a heating appliance that changes the set temperature according to input signals from the up switch and the down switch,
A set temperature determination unit that determines whether the set temperature has reached a prestored reference temperature, an input condition determination unit that determines an input condition from switches such as the up switch, and the set temperature determination unit And a set temperature changing unit that changes the set temperature based on the determination result of the input condition determining unit,
The set temperature changing unit is currently set to be effective when the ON signal from the up switch is continuously input beyond the first reception time at a temperature lower than the reference temperature in the temperature setting mode. In addition to processing to raise the temperature by a predetermined temperature, if the ON signal from the up switch is continuously input, return to the beginning of the temperature setting mode and repeat the above processing to increase the current set temperature sequentially. ,
Also, on the higher temperature side than the reference temperature, when the OFF signal from the up switch is continuously input for a predetermined time, the input condition determining unit determines that the special condition is satisfied, and thereafter, from the up switch When the ON signal is continuously input beyond the second reception time longer than the first reception time, the input condition determination unit determines that the different conditions are satisfied, and determines the special condition and thereafter When the different set conditions are satisfied, the current set temperature is increased by a predetermined temperature, and the current set temperature is sequentially increased every time the special condition and the different conditions determined thereafter are satisfied. set the temperature control apparatus of heating appliances characterized by. In an up switch that raises the set temperature, a down switch that lowers the set temperature, and a set temperature control device for a heating appliance that changes the set temperature according to input signals from the up switch and the down switch,
A set temperature determination unit that determines whether the set temperature has reached a prestored reference temperature, an input condition determination unit that determines an input condition from switches such as the up switch, and the set temperature determination unit And a set temperature changing unit that changes the set temperature based on the determination result of the input condition determining unit,
The set temperature changing unit is currently set to be effective when the ON signal from the up switch is continuously input beyond the first reception time at a temperature lower than the reference temperature in the temperature setting mode. In addition to processing to raise the temperature by a predetermined temperature, if the ON signal from the up switch is continuously input, return to the beginning of the temperature setting mode and repeat the above processing to increase the current set temperature sequentially. ,
Further, on the higher temperature side than the reference temperature , when an ON signal is input from a special switch provided separately from the up switch, the input condition determination unit determines that the special condition is satisfied, and then When the ON signal from the up switch is continuously input over a second reception time longer than the first reception time, the input condition determination unit determines that the different conditions are satisfied, and the special condition In addition, the current set temperature is increased by a predetermined temperature when different conditions determined thereafter are satisfied, and the current set temperature is sequentially increased every time the special condition and the different conditions determined thereafter are satisfied. set temperature control apparatus of heaters which comprises treating the.

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