TWI740879B - Heating conditioner - Google Patents

Abstract

Provides a heating conditioner that can suppress the temperature fluctuation range detected from the conditioning container to a small range with simple control when automatically adjusting the heating amount of the conditioning container of the heating mechanism.

The heating mechanism for heating the conditioning container can adjust the heating capacity according to the heating capacity levels of multiple stages. The heating control mechanism that automatically changes the heating capacity sets the temperature range corresponding to each heating capacity level based on the target temperature. When the detected temperature exceeds the upper limit of the temperature range corresponding to the current heating capacity level, the heating capacity level becomes smaller. When the detected temperature is lower than the lower limit of the temperature range corresponding to the current heating capacity level, the heating capacity level becomes larger.

Description

Heating conditioner

The present invention relates to a heating conditioner having a function of automatically adjusting the heating amount of a conditioning container of a heating mechanism in response to the temperature of the conditioning container.

Regarding this type of heating conditioner, for example, a gas stove with a furnace burner as a heating mechanism, an electromagnetic conditioner with an induction heating (IH) part as a heating mechanism, or a nickel-chromium wire heater as Electric furnace of heating mechanism, etc.

Moreover, for example, there is known a gas stove having a pot bottom temperature sensor (temperature detection mechanism) that detects the temperature of the bottom of a conditioning container such as a pot heated by a furnace burner (heating mechanism), In response to the detection temperature of the pot bottom temperature sensor, the fire power (heating capacity) of the furnace burner is switched and adjusted in a two-stage type of low fire and strong fire, so as to maintain the heating temperature of the conditioning container within a predetermined temperature range (for example, , Refer to Patent Document 1).

However, even if the heating volume is adjusted in a two-stage manner, it is difficult to maintain the temperature of the conditioning container (the detection temperature of the pot bottom temperature sensor) that contains the object to be heated in a predetermined temperature range, which is relative to the target. The problem of large temperature fluctuations in the temperature conditioning container.

Therefore, in the heating mechanism, it can be heated from the minimum The heating capacity range up to the maximum heating capacity is divided into multiple heating capacity levels to adjust the heating capacity. Then, it is conceivable that when the detection temperature rises when the heating mechanism is controlled, the heating level is reduced in multiple stages in response to the decrease in the temperature difference between the detection temperature and the target temperature. When the detection temperature drops , In response to the increase in the temperature difference between the detected temperature and the target temperature, the heating level becomes larger in multiple stages.

According to this, when the temperature of the conditioning container rises and the detected temperature approaches the target temperature, as the difference between the detected temperature and the target temperature becomes smaller, the heating level becomes smaller in multiple stages, so that the so-called overshoot can be suppressed at At a minimum, when the temperature of the conditioning container decreases and the detected temperature is far away from the target temperature, as the difference between the detected temperature and the target temperature increases, the heating level becomes larger in multiple stages, so that the so-called undershoot can be suppressed to a minimum.

Advanced technical literature

Patent literature

Patent Document 1: Japanese Patent Laid-Open No. 6-123429

Summary of the invention

However, in order to suppress the so-called overshoot and undershoot by the above-mentioned method, it is necessary to determine whether the temperature of the conditioning container is rising or falling, and its control will be complicated.

In view of the above matters, the purpose of the present invention is to provide a simple control when the heating amount of the conditioning container of the heating mechanism is automatically adjusted. The temperature fluctuation range detected from the conditioning container is suppressed to a small range of heating conditioners.

In order to achieve the above-mentioned object, the present invention is provided with a heating conditioner: a heating mechanism to heat the conditioning container containing the object to be conditioned; a temperature detection mechanism to detect the temperature of the aforementioned conditioning container; a heating control mechanism to increase or decrease the aforementioned heating mechanism The heating capacity of the temperature detection mechanism is to make the detection temperature of the temperature detection mechanism become the preset target temperature; it is characterized in that the heating mechanism can be divided into a plurality of stages according to the heating capacity range from the minimum heating capacity to the maximum heating capacity. The heating volume level is used to adjust the heating volume; the aforementioned heating control mechanism sets the temperature range corresponding to each heating volume level based on the aforementioned target temperature, when the detection temperature of the aforementioned temperature detection mechanism exceeds the temperature range corresponding to the current heating volume level The limit value reduces the heating level, and when the temperature detected by the aforementioned temperature detection mechanism is lower than the lower limit of the temperature range corresponding to the current heating level, the heating level becomes larger.

When the heating mechanism starts to heat the conditioning container containing the conditioned object, the heating control mechanism automatically adjusts the heating amount of the heating mechanism so that the detected temperature of the temperature detection mechanism becomes the target temperature. In the initial stage when the heating mechanism starts to heat, since the detected temperature of the temperature detection mechanism is lower than the target temperature, the heating control mechanism controls the heating mechanism to increase the heating level. During this period, the heating control mechanism calculates the difference between the detected temperature and the target temperature in response to changes in the detected temperature.

Then, because the temperature of the conditioning container rises, the detection temperature When the temperature is close to the target temperature, the difference between the detected temperature and the target temperature will become smaller. Along with this, the heating control mechanism performs the following control: according to each predetermined temperature difference, the heating amount level becomes smaller in response to the decrease in the temperature difference between the detected temperature and the target temperature.

In addition, after the detected temperature exceeds the target temperature, when the detected temperature changes from rising to falling and the detected temperature is lower than the target temperature, the heating control mechanism automatically adjusts the amount of heating to prevent an excessive decrease in the detected temperature. During this period, the heating control mechanism calculates the difference between the detected temperature and the target temperature in response to changes in the detected temperature. Then, because the temperature of the conditioning container decreases and the detected temperature is far away from the target temperature, the difference between the detected temperature and the target temperature will become larger, so the heating control mechanism performs control to increase the heating level.

In the present invention, the heating control mechanism sets the temperature range corresponding to each heating level based on the target temperature. As long as the detected temperature is within the temperature range corresponding to the current heating level, the heating control mechanism maintains the current heating level.

On the other hand, when the detected temperature exceeds the temperature range corresponding to the current heating level, the heating level is reduced to suppress the temperature rise. When the detected temperature is lower than the temperature range corresponding to the current heating level , The heating level is made smaller and the temperature drop is suppressed.

By using the temperature range corresponding to each heating level to determine the change of the heating level in this way, there is no need to determine whether the detected temperature is rising or falling, and the control becomes simple.

In other words, if the temperature of the realm between adjacent heating levels is the same, it may be affected by the slight change in temperature. The adjacent heating levels are switched slightly, that is, the so-called swing phenomenon may occur.

Therefore, in the present invention, it is preferable that the aforementioned temperature ranges of the aforementioned heating capacity levels partially overlap between the adjacent heating capacity levels. According to this, there is a temperature range between the adjacent heating levels, and the temperature changes from the heating level of one of the adjacent heating levels to the heating level of the other side, and the heating level from the other side to one of the heating levels. The temperature at which the heating level changes will be different. Therefore, for example, since the heating level that has just become larger needs to lower the temperature of the overlapping part before it can be changed to a small heating level, the swing phenomenon can be prevented.

In addition, the heating conditioner of the present invention has: an operating knob, which can be operated by the user to set the heating level; a plurality of position display parts, corresponding to the operating volume of the operating knob to display each heating level; light-emitting elements, It is set in each position display part to selectively emit light of multiple colors; the light-emitting element control mechanism makes the light-emitting element of the position display part that displays the heating level set by the user operation to emit light, when the heating control mechanism When the heating level is changed, the light-emitting element of the position indicator that displays the heating level set by the user is kept luminous, and the light-emitting element of the position indicator that displays the heating level changed by the heating control mechanism is used with the display. The light-emitting element of the position indicating part of the heating level set by the user emits light in different colors.

As mentioned above, the heating conditioner of the present invention uses the heating control mechanism to automatically adjust the heating amount to make the temperature of the conditioning container become the target temperature. On the other hand, the heating conditioner of the present invention can also be used by The operator performs the operation of the operating knob to set the heating level. Therefore, when the heating of the conditioning container starts, the heating level set by the user using the operating knob is changed by the heating control mechanism. Therefore, because the conditioning container is heated with a heating amount different from the content manually set by the user, the user feels something wrong.

In this regard, by the aforementioned light-emitting element control mechanism, firstly, the light-emitting element of the position indicating portion displaying the heating level set by the user is maintained in a light-emitting state. After that, when the heating control mechanism changes the heating level, the light-emitting element control mechanism causes the light-emitting element of the position indicating section to display the heating level changed at this time with the light-emitting element of the position indicating section that displays the heating level set by the user Different colors to shine. In this way, the user can visually confirm the manually set heating level and the automatically changed heating level, which can alleviate the user's feeling of wrongness.

1: Gas stove (heating conditioner)

2: Furnace burner (heating mechanism)

3: Controller

4: Operation panel

7: Pot bottom temperature sensor (temperature detection mechanism)

8: Gas stove

9: Pot (conditioning container)

10: Operation knob

10a, 10b, 10c, 10d, 10e: position display part

11: Gas supply pipe

12: Source solenoid valve

13: Flow control valve

14: Ignition electrode

15: Thermocouple

16: Fire control section (heating control mechanism)

17: Position display control unit (light emitting element control mechanism)

18: Temperature range setting section

19: Firepower level selection department

21: stepping motor

Fig. 1... A diagram schematically showing the configuration of important parts of a gas stove which is an embodiment of the present invention.

Figure 2... An explanatory diagram illustrating the temperature range set according to each firepower level.

Figure 3...shows the flow chart of the operation of the fire control department.

Figure 4... A flowchart illustrating the operation of a part of the operation of Figure 3.

Figure 5... A diagram showing the operating knob.

Fig. 6... A diagram explaining the light-emitting form of the position display portion of the operation knob.

The form used to implement the invention

The embodiment of the present invention will be described based on the drawings. In this embodiment, the gas stove 1 shown in Fig. 1 is used as a heating conditioner. As shown in Figure 1, the gas stove 1 has: a stove burner 2 (heating mechanism); a controller 3 to control the stove burner 2; an operation panel 4 formed by a switch group (not shown). The user operates to give desired instructions and various settings to the controller 3.

A pot bottom temperature sensor 7 (temperature detection mechanism) is provided at the center of the furnace burner 2. The pot bottom temperature sensor 7 is when the pot 9 (conditioning container) is placed on the gas hob 8 and abuts against the bottom of the pot 9 to output a signal indicating the detected temperature of the bottom of the pot 9 heated by the furnace burner 2.

The furnace burner 2 performs an ignition operation, a heating power adjustment, and a flameout operation by an operation knob 10 that can perform a press-in operation and a rotation operation. That is, by pressing the operating knob 10, the furnace burner 2 is ignited or extinguished. In addition, the heating power (heating amount) level of the furnace burner 2 can be adjusted by rotating the operation knob 10 (adjusting the fuel gas supply flow rate to the furnace burner 2). Incidentally, in the furnace burner 2 of this embodiment, its firepower level (heating level) can be adjusted in 9 stages (minimum firepower level "1" to maximum firepower level "9").

The fuel gas is supplied to the furnace burner 2 through the gas supply pipe 11. The gas supply pipe 11 is provided with a source solenoid valve 12 to open and close the gas supply pipe 11;

In addition, near the furnace burner 2, there is an ignition electrode 14 for igniting the furnace burner 2; a thermocouple 15 for detecting the furnace burner 2 The burning state.

The controller 3 executes a control program of the gas stove 1 held by a memory (not shown), and controls the operation of the gas stove 1.

As shown in Fig. 1, the controller 3 has the function of a heating power control unit 16 (heating control mechanism). Furthermore, the heating power control unit 16 has functions of a position display control unit 17 (light emitting element control mechanism), a temperature range setting unit 18 and a heating power level selection unit 19.

The operating signal of the operating knob 10 of the furnace burner 2, the signal showing the detection temperature of the pot bottom temperature sensor 7, and the signal showing the inflammation detection of the thermocouple 15 are input to the controller 3.

The controller 3 outputs control signals corresponding to each function, thereby controlling the operation of the source solenoid valve 12, the flow regulating valve 13, and the ignition electrode 14 of the gas supply pipe 11.

The flow control valve 13 is an electric valve that uses a proportional valve or a flow switching valve and changes the gas flow rate of the gas supply pipe 11 by a valve body not shown in the figure driven by a stepping motor 21. The controller 3 changes the opening of the flow regulating valve 13 through the stepping motor 21 to switch the firepower level of the furnace burner 2.

The fire power control part 16 of the controller 3 performs the combustion operation of the furnace burner 2 based on the operating signal of the operating knob 10, and automatically adjusts the fire power level based on the temperature detected by the bottom temperature sensor 7 to prevent overheating.

In the following, if it is specifically explained, in the gas burner 1 of this embodiment, the firepower level selection unit 19 uses the firepower level "1" and "α" in 9 stages (minimum firepower level "1" to maximum firepower level "9"). "Β" "Γ" and "9" for temperature control. Incidentally, the firepower levels "α", "β", and "γ" are appropriately set firepower levels, and the relationship between the firepower levels is "α"<"β"<"γ".

In addition, in the present embodiment, the temperature range setting unit 18 of the heating power control unit 16 sets the threshold value when determining the use of each heating power level at intervals of -5°C from the target temperature. That is, for example, when the target temperature is 260°C, as shown in FIG. 2, the temperature range setting unit 18 sets the temperature range for control corresponding to the heating power level "9" (hereinafter referred to as the control temperature range) Set below 235°C, set the control temperature range corresponding to the fire power level "γ" to 235°C to 240°C, and set the control temperature range corresponding to the fire power level "β" to 240°C to 245°C, which will correspond to the fire power The control temperature range corresponding to the level "α" is set at 245℃~250℃, and the control temperature range corresponding to the firepower level "1" is set above 250℃.

Furthermore, as shown in Figure 2, the present embodiment not only sets the corresponding control temperature range according to each heating level, but also uses adjacent heat levels "1", "α", "β", "γ", and "9". Setting the overlap of the temperature range between the firepower levels can prevent the neighboring firepower levels from being slightly switched due to the influence of subtle temperature changes, which can also prevent the so-called swing phenomenon.

Here, the choice of firepower level under temperature control is explained. First, as shown in FIG. 3, the user operates the operation knob 10 to ignite the furnace burner 2. The fire control unit 16 detects the ignition at this time in step 1, and then proceeds to step 2, and the temperature range setting unit 18 is based on the target Set the threshold for the temperature. At this time, it is assumed that the ignition power at the time of ignition is the fire power level "β". Other In addition, in the present embodiment, 260°C is used as the target temperature, and the threshold value is set at intervals of -5°C from the target temperature.

Going further to step 3, the temperature range setting unit 18 sets the control temperature range corresponding to each heating power level "1", "α", "β", "γ", and "9" as described above (refer to FIG. 2). In step 4 is the selection (change) of the heating power level corresponding to the detected temperature of the pot bottom temperature sensor 7 by the heating power level selection unit 19 (this process will be described later). Then, step 5 is to repeat the processing of step 4 until flameout is detected.

The processing of step 4 (selection processing of the firepower level) is described. As shown in FIG. 4, in step 6, the firepower control unit 16 detects the temperature by the bottom temperature sensor 7, and after step 7, the firepower level selection unit The operation of 19 is used to select (change) the firepower level and control the furnace burner 2 of the firepower level.

Explain the outline. Step 7~Step 10 judge the current firepower level. Step 11~Step 18 compare the detection temperature Tr and the control temperature range corresponding to each firepower level. Change the firepower level as needed and proceed with the steps. The processing corresponding to each condition in step 19~26.

For example, when the current firepower level is "γ", proceed to step 12 in step 8 and determine in step 12 that the detected temperature Tr of the bottom temperature sensor 7 (the temperature obtained in step 6) is 240°C or higher In the case of, in step 20, the firepower level is changed to "β". If it is determined in step 13 that the detected temperature Tr is lower than 230° C., in step 21, the heating power level is changed to "9". Although the selection of the firepower level ends here, because we proceed to step 5 in Figure 3, it will repeatedly move to Figure 4 until flameout is detected. Step 6. In this way, the heating power control unit 16 can select the best heating power level without determining whether the detected temperature Tr of the bottom temperature sensor 7 is rising or falling.

Moreover, according to the above control, the heating power control unit 16 reduces the heating power level as the detected temperature Tr becomes higher (closer to the target temperature), and can slow down the temperature rise of the pot 9 (conditioning container) earlier. The temperature Tr becomes lower (far away from the target temperature) and the firepower level becomes larger, which can slow down the temperature drop of the pot 9 (conditioning container) earlier, therefore, it can reduce the temperature fluctuation range of the pot 9 (conditioning container) compared to the target temperature .

In other words, according to the controller 3 of this embodiment, when the detected temperature is near the target temperature, the firepower level will be automatically switched, but the furnace burner 2 may perform combustion control at a firepower level different from the firepower level manually set by the user. It will cause the user to feel confused and mistakenly think it is a malfunction.

Therefore, in this embodiment, as shown in FIG. 5, a plurality of position indicating parts 10a, 10b, 10c, 10d, and 10e made of light-emitting elements are provided around the operation knob 10, and the position indicating parts 10a, The light-emitting patterns of 10b, 10c, 10d, and 10e represent the firepower level. Incidentally, the light-emitting element adopts a light-emitting element capable of selectively emitting light of two colors.

The position indication parts 10a, 10b, 10c, 10d, and 10e are set according to the predetermined rotation angle (operation amount) of the operation knob 10. As shown in FIG. 1, the position indication control part 17 of the controller 3 controls .

The position display control unit 17 uses 5 position display units 10a, 10b, 10c, 10d, and 10e represent the 9 stages of firepower level "1" to firepower level "9". The light-emitting form of each position display unit 10a, 10b, 10c, 10d, and 10e is as shown in Fig. 6. When the firepower level "1", "3", "5", "7", "9" is displayed, it is The lighting state is flashing when the firepower level "2", "4", "6", "8" is displayed.

Furthermore, the position display control unit 17 keeps the light emitting element of the position display unit displaying the firepower level manually set by the user (including the firepower level set in advance) in a blue light state, so that the display is displayed by the firepower control unit 16 The light-emitting element of the position indicator of the automatically changing firepower level glows in red.

According to this, the firepower level manually set by the user and the firepower level automatically changed by the firepower control unit 16 can be clearly distinguished, which can prevent the user from being confused and mistakenly thinking that it is a malfunction.

Incidentally, although the example shown in this embodiment uses the temperature range setting unit 18 to set the control temperature range corresponding to each heating power level with the actual temperature that can be directly compared with the target temperature, in addition, The temperature range corresponding to each firepower level can also be compared with the value of the difference between the target temperature. That is, specifically, when the temperature range setting unit 18 of the heating power control unit 16 sets the threshold for determining the use of each heating power level at intervals of -5°C from the target temperature, it can also be compared with the heating power level " The temperature difference range corresponding to "9" is set to be greater than the target temperature of -30°C, and the temperature difference range corresponding to the fire power level "γ" is set to the target temperature of -20°C ~ -25°C, which will correspond to the fire power level "β" Corresponding temperature difference range The temperature is set at the target temperature of -15℃~-20℃, and the temperature difference range corresponding to the fire power level "α" is set at the target temperature of -10℃~-15℃, and the temperature difference corresponding to the fire power level "1" will be set The range is set below -5°C of the target temperature.

In addition, although the present embodiment is described with respect to the gas stove 1, the present invention is not limited to the gas stove 1. For example, an electromagnetic conditioner or an electric stove may be used. In the case of an electromagnetic conditioner or an electric furnace, by switching to the above-mentioned control of the heating power of the furnace burner 2 and controlling the power supply to the induction heating section and the nickel-chromium wire heater, the same as this embodiment can be obtained. The same effect.

1: Gas stove (heating conditioner)

2: Furnace burner (heating mechanism)

3: Controller

4: Operation panel

7: Pot bottom temperature sensor (temperature detection mechanism)

8: Gas stove

9: Pot (conditioning container)

10: Operation knob

10a, 10b, 10c, 10d, 10e: position indicator

11: Gas supply pipe

12: Source solenoid valve

13: Flow control valve

14: Ignition electrode

15: Thermocouple

16: Fire control section (heating control mechanism)

17: Position display control unit (light emitting element control mechanism)

18: Temperature range setting section

19: Firepower level selection department

21: stepping motor

Claims (2)

A heating conditioner has: a heating mechanism to heat a conditioning container containing a conditioned object; a temperature detection mechanism to detect the temperature of the aforementioned conditioning container; a heating control mechanism to increase or decrease the heating amount of the aforementioned heating mechanism to make the temperature The detection temperature of the detection mechanism becomes the pre-set target temperature; the heating mechanism can adjust the heating volume according to the heating volume range from the minimum heating volume to the maximum heating volume divided into a plurality of heating volume levels; the heating control mechanism mentioned above The temperature range corresponding to each heating level is set based on the aforementioned target temperature. When the detected temperature of the aforementioned temperature detection mechanism exceeds the upper limit of the temperature range corresponding to the current heating level, the heating level becomes smaller. When the detection temperature of the temperature detection mechanism is lower than the lower limit of the temperature range corresponding to the current heating capacity level, the heating capacity level becomes larger; the heating conditioner is characterized by: an operating knob, which can be operated by the user And set the heating level; a plurality of position display parts corresponding to the operation amount of the operating knob to display each heating level; the light-emitting element is set in each position display part to selectively emit light of a plurality of colors; and The light-emitting element control mechanism controls the light emission of each light-emitting element; the number of the position indicating parts is less than the number of the heating amount levels, and the position indicating part is configured such that one position indicating part displays a plurality of heating amount levels, The aforementioned light-emitting element control mechanism makes the light-emitting element of the position indicating portion that displays the heating level set by the user operation set to a light or flashing light-emitting state, and when the aforementioned heating control mechanism changes the heating level, it causes the user to display the setting The light-emitting element of the position indicating section of the heating level maintains the aforementioned light-emitting state, so that the light-emitting element of the position indicating section that displays the heating level changed by the heating control mechanism is in line with the position indicating section that displays the heating level set by the user The light-emitting elements emit light in different colors. Such as the heating conditioner of claim 1, wherein the aforementioned temperature range of each heating level is partially overlapped between adjacent heating levels.

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