TW201734369A - Heating cooker capable of regulating the heating amount according to each heating amount level of multiple stages - Google Patents

Abstract

The subject of the present invention is to provide a heating cooker capable of limiting fluctuation of temperature detected from a cooking container in a small range by a simple control when automatically regulating the heating amount of the cooking container by the heating mechanism. To solve the problem, a heating mechanism for heating a cooking container is capable of regulating the heating amount according to each heating amount level of multiple stages. A heating control mechanism for automatically changing the heating amount is configured to set a temperature range corresponding to each heating amount level based on a target temperature. When the detected temperature exceeds an upper limit of the temperature range corresponding to the current heating amount level, the heating amount level is decreased. When the detected temperature is lower than a lower limit of the temperature range corresponding to the current heating amount level, the heating amount level is increased.

Description

Heating conditioner

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

A heating conditioner of this type is, for example, a gas burner having a furnace burner as a heating mechanism, an electromagnetic conditioner having an induction heating (IH) portion as a heating mechanism, or a nickel-chromium wire heater as a heater. Electric furnace of heating mechanism, etc.

Further, for example, there is known a gas burner having a bottom temperature sensor (temperature detecting means) for detecting the temperature of the bottom of the conditioning vessel heated by a furnace burner (heating mechanism), etc. According to the detection temperature of the bottom temperature sensor, the firepower (heating amount) of the furnace burner is switched and regulated in a two-stage manner such as weak fire and strong fire, thereby maintaining the heating temperature of the conditioning container at a predetermined temperature range (for example, , refer to Patent Document 1).

However, even if the heating amount is switched and adjusted in a two-stage manner, it is difficult to maintain the temperature of the conditioning container in which the object is accommodated (the detection temperature of the bottom temperature sensor) within a predetermined temperature range, which is relative to the target. The temperature of the conditioning container has a large temperature fluctuation range.

Therefore, in the heating means, the heating amount can be adjusted by dividing the heating amount range from the minimum heating amount to the maximum heating amount into the respective heating amount levels of the plurality of stages. Then, it is conceivable that when the heating mechanism is controlled, when the temperature rise is detected, the heating amount level is reduced in a plurality of stages in response to the decrease in the temperature difference between the detected temperature and the target temperature, and when the detected temperature is lowered, The heating level is increased in a plurality of stages in response to an increase in the temperature difference between the detected temperature and the target temperature.

According to this, when the temperature of the conditioning container rises and the detected temperature approaches the target temperature, the so-called overshoot can be suppressed in a plurality of stages as the difference between the detected temperature and the target temperature becomes smaller and the heating amount level becomes smaller. At the very least, when the temperature of the conditioning container is lowered and the detection temperature is far from the target temperature, the so-called undershoot can be minimized as the difference between the detected temperature and the target temperature becomes larger and the heating amount level becomes larger. Advanced technical literature

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

SUMMARY OF THE INVENTION Problem to be Solved by the Invention However, in the case where the so-called overshoot and undershoot are suppressed by the above method, it is necessary to judge whether the temperature of the conditioning container is rising or falling, and the control thereof is complicated.

In view of the above, it is an object of the present invention to provide a heating conditioner which can suppress the fluctuation range of the temperature detected from the conditioning container to a small extent by a simple control when the heating amount of the conditioning container of the heating mechanism is automatically adjusted. Means to solve the problem

In order to achieve the object, the present invention has a heating mechanism having: a heating mechanism for heating a conditioning container containing the conditioned material; a temperature detecting mechanism for detecting a temperature of the conditioning container; and a heating control mechanism for increasing or decreasing the heating mechanism The heating amount is such that the detection temperature of the temperature detecting means becomes a target temperature set in advance; wherein the heating means can divide the heating amount range from the minimum heating amount to the maximum heating amount into a plurality of stages The heating amount is used to adjust the heating amount; the heating control mechanism sets a temperature range corresponding to each heating level based on the target temperature, and when the detected temperature of the temperature detecting mechanism exceeds a temperature range corresponding to the current heating level When the limit temperature is set to be smaller, the heating amount level becomes larger when the detected temperature of the temperature detecting means is lower than the lower limit of the temperature range corresponding to the current heating level.

When the heating mechanism starts to heat the conditioning container containing the conditioned material, the heating control mechanism automatically adjusts the heating amount of the heating mechanism to make the detected temperature of the temperature detecting mechanism the target temperature. In the initial stage in which the heating mechanism starts heating, since the detected temperature of the temperature detecting means is lower than the target temperature, the heating control means controls the heating means to increase the heating amount level. During this period, the heating control unit calculates the difference between the detected temperature and the target temperature in response to the change in the detected temperature.

Then, since the temperature of the conditioning container rises so that the detected temperature approaches the target temperature, the difference between the detected temperature and the target temperature becomes small. Along with this, the heating control means performs control for reducing the heating amount level in accordance with the respective temperature difference, in response to a decrease in the temperature difference between the detected temperature and the target temperature.

Further, 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 suppress an excessive decrease in the detected temperature. During this period, the heating control unit calculates the difference between the detected temperature and the target temperature in response to the change in the detected temperature. Then, since the temperature of the conditioning container is lowered and the detection temperature is kept away from the target temperature, the difference between the detected temperature and the target temperature is increased, so that the heating control means performs control for increasing the heating amount level.

In the present invention, the temperature range corresponding to each heating amount level is set based on the target temperature by the heating control means. 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 amount level, the heating amount level is made small to suppress the temperature rise, and when the detected temperature is lower than the temperature range corresponding to the current heating amount level, Next, the heating amount level is made small to suppress the temperature drop.

By determining the change in the heating amount level by using the temperature range corresponding to each heating amount level as described above, it is not necessary to judge whether the detected temperature is rising or falling, and the control becomes simple.

In other words, if the temperatures of the boundaries between the heating levels adjacent to each other are the same, the switching between the adjacent heating levels may be finely affected by the slight fluctuation of the temperature, that is, the so-called swing phenomenon may occur.

Therefore, in the present invention, it is preferable that the temperature range of each of the above heating amount levels partially overlaps between adjacent heating levels. According to this, a temperature range is set at a boundary between the heating amount levels adjacent to each other, and the temperature is changed from the heating level of one of the adjacent ones to the heating level of the other, and the heating level of the other side is toward one of the other. The temperature at which the heating level changes will be different. Therefore, for example, since the heating level which has just become larger needs to be lowered to the temperature of the overlapping portion to change to a small heating level, the swing phenomenon can be prevented.

In addition, the heating conditioner of the present invention has an operation knob, and the heating level can be set by a user operation; a plurality of position indicating portions display the respective heating level levels corresponding to the operation amount of the operation knob; Each of the position indicating portions is configured to selectively emit light of a plurality of colors, and the light emitting element control means causes the light emitting elements that display the position indicating portion of the set heating level to be illuminated by the user, and the heating control mechanism When the heating amount level is changed, the light-emitting element of the position indicating portion that displays the heating amount level set by the user is kept in a state of being illuminated, and the light-emitting element of the position indicating portion that displays the heating level changed by the heating control means is used for display and display. The position of the heating level set by the user indicates that the light-emitting elements of the portion emit light in different colors.

As described above, the heating conditioner of the present invention automatically adjusts the heating amount at which the temperature of the conditioning container becomes the target temperature by the heating control mechanism. On the other hand, the heating conditioner of the present invention can also set the heating level by the operation of the operation knob performed by the user. Therefore, when the heating of the conditioning container is started, the heating level set by the user using the operation knob is changed by the heating control mechanism. Therefore, since the heating of the conditioning container is performed by a heating amount different from the content manually set by the user, the user may feel that something is wrong.

On the other hand, the light-emitting element control means firstly maintains the state in which the light-emitting elements of the position indicating portion of the heating level set by the user are kept illuminated. Thereafter, when the heating control means changes the heating amount level, the light-emitting element control means causes the light-emitting element of the position indicating portion that displays the heating level level changed at this time to be the light-emitting element of the position indicating portion of the heating amount level set by the display user. Different colors to illuminate. Thereby, the user can visually confirm the manually set heating level and the automatically changing heating level, which can alleviate the user's feeling of wrong.

Embodiments for Carrying Out the Invention An embodiment of the present invention will be described based on the drawings. In the present embodiment, the gas furnace 1 shown in Fig. 1 is used as the heating conditioner. As shown in Fig. 1, the gas furnace 1 has a furnace burner 2 (heating mechanism), a controller 3, a furnace burner 2, and an operation panel 4 formed by a switch group (not shown). The user operates to make desired instructions and various settings to the controller 3.

A pan bottom temperature sensor 7 (temperature detecting means) is provided at the center of the furnace burner 2. The pan bottom temperature sensor 7 abuts against the bottom of the pan 9 when the pan 9 (conditioning container) is placed on the gas hob 8, and outputs a signal indicating the detected temperature at the bottom of the pan 9 heated by the 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, the furnace burner 2 is ignited or extinguished by performing a press-in operation on the operation knob 10. Further, the level of the heating power (heating amount) of the furnace burner 2 (the supply flow rate of the fuel gas to the furnace burner 2) can be adjusted by rotating the operation knob 10. Incidentally, in the furnace burner 2 of the present embodiment, the fire level (heating level) can be adjusted in nine stages (minimum fire level "1" to maximum fire 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 for opening and closing the gas supply pipe 11, and a flow rate adjusting valve 13 for regulating the flow rate of the fuel gas flowing through the gas supply pipe 11.

Further, near the furnace burner 2, an ignition electrode 14 for igniting the furnace burner 2 and a thermocouple 15 for detecting the combustion state of the furnace burner 2 are provided.

The controller 3 controls the operation of the gas furnace 1 by executing a control program of the gas furnace 1 held by a memory (not shown).

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

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

The controller 3 outputs control signals corresponding to the respective functions, thereby controlling the operation of the source solenoid valve 12, the flow rate adjusting valve 13, the ignition electrode 14, and the like of the gas supply pipe 11.

The flow rate adjusting valve 13 is an electric valve that changes the gas flow rate of the gas supply pipe 11 by a proportional valve or a flow rate switching valve and is driven by a stepping motor 21 (not shown). The controller 3 changes the opening degree of the flow rate adjusting valve 13 through the stepping motor 21, thereby switching the fire level of the furnace burner 2.

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

In the gas furnace 1 of the present embodiment, the firepower level selection unit 19 uses the firepower level "1" and "α" in the nine stages (minimum firepower level "1" to the maximum firepower level "9"). Temperature control is performed by "β", "γ" and "9". Incidentally, the firepower level "α", "β" and "γ" are firepower levels that are appropriately set. The magnitude of the firepower level is "α" < "β" < "γ".

Further, in the present embodiment, the temperature range setting unit 18 of the heating power control unit 16 sets the threshold value at the time of determining the use of each of the firepower levels from the target temperature of -5 °C. In other words, when the target temperature is 260 ° C, as shown in FIG. 2, the temperature range setting unit 18 sets a temperature range (hereinafter, referred to as a control temperature range) corresponding to the fire level "9" for control. Set below 235 °C, set the control temperature range corresponding to the firepower level "γ" to 235 °C ~ 240 °C, set the control temperature range corresponding to the firepower level "β" to 240 °C ~ 245 °C, and the firepower The control temperature range corresponding to the level "α" is set at 245 ° C to 250 ° C, and the control temperature range corresponding to the fire level "1" is set to 250 ° C or higher.

Further, as shown in Fig. 2, in the present embodiment, the control temperature range is set not only in accordance with each heating level, but also in the vicinity of the fire level "1", "α", "β", "γ" and "9". The overlapping of the temperature ranges is set between the firepower levels, thereby preventing the so-called swing phenomenon from being finely switched by the influence of the slight temperature change.

Here, the selection of the firepower level under temperature control will be described. First, as shown in FIG. 3, the user operates the operation knob 10 to ignite the furnace burner 2, and the heating power control unit 16 proceeds to step 2 when the ignition is detected in step 1, 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 level "β". Further, in the present embodiment, the target temperature is 260 ° C, and the threshold value is set at an interval of -5 ° C from the target temperature.

Further, the process proceeds to step 3, and the temperature range setting unit 18 sets a control temperature range corresponding to each of the firepower levels "1", "α", "β", "γ", and "9" as described above (refer to FIG. 2). 4 is the selection (change) of the firepower level corresponding to the detected temperature of the pan temperature sensor 7 by the firepower level selecting unit 19 (this process will be described later). Then, step 5 is to repeat the processing of step 4 until a flameout is detected.

The process of step 4 (the selection process of the firepower level) will be described. As shown in FIG. 4, in step 6, the heating power control unit 16 performs temperature detection by the pan temperature sensor 7, and after step 7, the fire level selection unit The operation of 19 performs the selection of the fire level (change) and the control of the burner 2 of the fire level.

In the explanations, in steps 7 to 10, the current firepower level is determined. In steps 11 to 18, the detected temperature Tr is compared with the control temperature range corresponding to each firepower level, and the firepower level is changed as needed, and the steps are performed. The processing of each condition from 19 to 26 is corresponding.

For example, when the current firepower level is "γ", the process proceeds to step 12 in step 8, and in step 12, it is determined that the detected temperature Tr of the pan bottom temperature sensor 7 (the temperature obtained in step 6) is 240 ° C or higher. In the case of step 20, the fire level is changed to "β". When it is judged in step 13 that the detected temperature Tr is lower than 230 ° C, the fire level is changed to "9" in step 21. Although the selection of the fire level is completed here, since it proceeds to step 5 of Fig. 3, it will move to step 6 of Fig. 4 again after detecting the flameout. In this manner, the fire control unit 16 can select the optimum fire level without determining whether the detected temperature Tr of the pan temperature sensor 7 is rising or falling.

Further, according to the above control, the fire power control unit 16 causes the firepower level to become smaller as the detected temperature Tr becomes higher (close to the target temperature), and the temperature rise of the pan 9 (conditioning container) can be slowed down earlier, with detection. When the temperature Tr becomes lower (away from the target temperature) and the firepower level becomes larger, the temperature drop of the pot 9 (conditioning container) can be slowed down earlier, so that the temperature variation range of the pot 9 (conditioning container) compared to the target temperature can be reduced. .

In other words, according to the controller 3 of the present embodiment, when the detected temperature is in the vicinity of the target temperature, the fire level is automatically switched, but the furnace burner 2 performs combustion control at a fire level different from the manually set fire level of the user. It can cause users to be confused and mistaken for failure.

Therefore, in the present embodiment, as shown in FIG. 5, a plurality of position indicating portions 10a, 10b, 10c, 10d, and 10e formed of light-emitting elements are provided around the operation knob 10, and each position indicating portion 10a can be provided. The light-emitting patterns of 10b, 10c, 10d, and 10e indicate the firepower level. Incidentally, the light-emitting element is a light-emitting element that selectively emits light in two colors of light.

Each of the position indicating portions 10a, 10b, 10c, 10d, and 10e is provided in accordance with a predetermined rotation angle (operation amount) of the operation knob 10, and is controlled by the position of the controller 3 as shown in FIG. .

The position display control unit 17 is nine stages of the fire level "1" to the fire level "9" using the five position display units 10a, 10b, 10c, 10d, and 10e. The light-emitting form of each of the position display units 10a, 10b, 10c, 10d, and 10e is as shown in FIG. 6, and when the firepower levels "1", "3", "5", "7", and "9" are displayed, In the lighting state, when the firepower levels "2", "4", "6", and "8" are displayed, the state is blinking.

Further, the position indicating control unit 17 causes the light-emitting element of the position indicating portion that displays the fire level manually set by the user (including the fire level at the time of ignition set in advance) to maintain the state of blue light emission, and causes the display by the heating power control unit 16 The light-emitting element of the position indicating portion of the automatically changed fire level is illuminated 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, and the user can be prevented from being confused or mistaken as a malfunction.

Incidentally, in the example shown in the present embodiment, the temperature range setting unit 18 sets the control temperature range corresponding to each fire level with the actual temperature directly comparable to the target temperature, but The temperature range corresponding to each fire level can also be compared with the value of the difference between the use and the target temperature. In other words, when the temperature range setting unit 18 of the heating power control unit 16 sets the threshold value at the time of determining the use of each of the firepower levels from the target temperature of -5 ° C, the firepower level may be " 9) The corresponding temperature difference range is set to be larger than -30 °C of the target temperature, and the temperature difference range corresponding to the firepower level "γ" is set to -20 ° C ~ -25 ° C of the target temperature, and the fire level "β" The corresponding temperature difference range is set at -15 °C ~ -20 °C of the target temperature, and the temperature difference range corresponding to the firepower level "α" is set at -10 °C ~ -15 °C of the target temperature, and the fire level is "1". The corresponding temperature difference range is set to be below -5 ° C of the target temperature.

Further, although the present embodiment has been described with respect to the gas furnace 1, the present invention is not limited to the gas furnace 1, and for example, an electromagnetic conditioner or an electric furnace may be employed. In the case of an electromagnetic conditioner or an electric furnace, by controlling the heating power to the induction heating unit and the nickel chrome line heater by controlling the heating power of the furnace burner 2 as described above, the present embodiment can be obtained. The same effect.

1‧‧‧ gas furnace (heating conditioner)
2‧‧‧furnace burner (heating mechanism)
3‧‧‧ Controller
4‧‧‧Operator panel
7‧‧‧Bottom temperature sensor (temperature detector)
8‧‧‧ gas stove
9‧‧‧ pot (conditioning container)
10‧‧‧Operation knob
10a, 10b, 10c, 10d, 10e‧‧‧ position indication
11‧‧‧ gas supply pipe
12‧‧‧Source solenoid valve
13‧‧‧Flow regulating valve
14‧‧‧Ignition electrode
15‧‧‧Thermal pair
16‧‧‧Fire Control Department (heating control mechanism)
17‧‧‧ Position indication control unit (light-emitting element control unit)
18‧‧‧ Temperature Range Setting Department
19‧‧‧Firepower Selection Department
21‧‧‧Stepper motor

Fig. 1 is a view schematically showing the configuration of an important part of a gas burner which is an embodiment of the present invention. Fig. 2 is an explanatory view showing a temperature range set in accordance with each fire level. Figure 3... shows a flow chart of the operation of the fire control unit. Figure 4 is a flow chart illustrating the operation of one of the operations of Figure 3. Figure 5... shows the diagram of the operating knob. Fig. 6 is a view for explaining a light-emitting form of a position indicating portion of the operation knob.

1‧‧‧ gas furnace (heating conditioner)

2‧‧‧furnace burner (heating mechanism)

3‧‧‧ Controller

4‧‧‧Operator panel

7‧‧‧Bottom temperature sensor (temperature detector)

8‧‧‧ gas stove

9‧‧‧ pot (conditioning container)

10‧‧‧Operation knob

10a, 10b, 10c, 10d, 10e‧‧‧ position indication

11‧‧‧ gas supply pipe

12‧‧‧Source solenoid valve

13‧‧‧Flow regulating valve

14‧‧‧Ignition electrode

15‧‧‧Thermal pair

16‧‧‧Fire Control Department (heating control mechanism)

17‧‧‧ Position indication control unit (light-emitting element control unit)

18‧‧‧ Temperature Range Setting Department

19‧‧‧Firepower Selection Department

21‧‧‧Stepper motor

Claims (3)

A heating conditioner has: a heating mechanism for heating a conditioning container containing a conditioned object; a temperature detecting mechanism for detecting a temperature of the conditioning container; and a heating control mechanism for increasing or decreasing a heating amount of the heating mechanism to make the temperature The detection temperature of the detection mechanism is a target temperature set in advance; the heating conditioner is characterized in that the heating mechanism can divide the heating amount range from the minimum heating amount to the maximum heating amount into the heating amount levels of the plurality of stages. Adjusting the heating amount; the heating control means sets a temperature range corresponding to each heating level based on the target temperature, and when the detected temperature of the temperature detecting means exceeds a temperature range upper limit corresponding to the current heating level The heating amount level becomes small, and when the detected temperature of the temperature detecting means is lower than the lower limit of the temperature range corresponding to the current heating amount level, the heating amount level becomes large. A heating conditioner according to claim 1, wherein said temperature range of said each heating level is partially overlapped between adjacent heating levels. The heating conditioner according to claim 1 or 2, further comprising: an operation knob, wherein the heating amount level can be set by a user operation; the plurality of position indicating portions display the respective heating level levels corresponding to the operation amount of the operation knob The light-emitting element is provided in each position indicating portion to selectively emit light of a plurality of colors; and the light-emitting element control means causes the light-emitting element that displays the position indicating portion of the heating level set by the user to emit light. When the heating control means changes the heating amount level, the light-emitting element of the position indicating portion that displays the heating level set by the user is maintained in a state of being illuminated, and the light-emitting element of the position indicating portion of the heating amount level in which the heating control means is changed is displayed. The light is emitted in a color different from the light-emitting element of the position indicating portion of the heating amount level set by the user.