TWI572828B - Cooking pot monitoring apparatus and method thereof for gas stove - Google Patents

Description

Gas stove monitoring device and off-pot monitoring method

The invention provides an off-pot monitoring device and a method for monitoring the off-pot, in particular to a burner group (gas burner) for setting in a gas furnace to determine whether the pot leaves the pot device (furnace rack) or is set back. The pan monitoring device and the pan monitoring method of the pan setting device.

In common cooking operations, such as stewing food, boiling soup, or boiled water, cookers are often unable to be present during cooking because of the long cooking time, if the cook is negligent due to forgetfulness or busyness. It often causes the fire to heat the pot over a long period of time, causing the water in the pot to dry out to form a state in which the pot is empty, which may cause the cooking to be burnt and unsatisfactory. In severe cases, the high temperature will burn. Cooking items, even gas, causes fires that endanger public safety.

The conventional gas furnace can be equipped with an anti-air-burning device, which can be provided with a temperature sensor in the burner, and can be detected by the temperature sensor when the pot is placed on the hob (pot device). The temperature at the bottom of the pot is judged by the program of the electronic control unit and the program built-in function is executed after the feedback. Therefore, when the temperature of the pot is abnormally warmed up, a signal is blocked to block the gas passage, thereby preventing the occurrence of fire.

However, the anti-air-burning device of the above-mentioned conventional gas stove, the movement of the pot from the hob and the return of the hob is not easy to judge by the program, for example, the pan is taken for cleaning, the pan is picked up and then lowered, and the temperature at the bottom of the pan has a drop. The program judgment is easy to have problems. Furthermore, In the process of cooking, the user often needs to move the pot with both hands, so it is difficult to switch the firepower of the gas burner while moving the pot. For example, when the pot is removed, the fire is switched to a small fire and moved back to the pot. Restore the original firepower with time.

In view of this, the present inventors have felt that the above-mentioned defects can be improved, and the present invention has been deliberately studied and used in conjunction with the theory, and finally proposes a present invention which is rational in design and effective in improving the above-mentioned defects.

The main object of the present invention is to provide a pan-disc monitoring device and a pan-disc monitoring method for a gas stove, which can effectively judge whether the pan is separated from the pan-discharging device or the pot-returning device, and automatically switches the firepower with the movement of the pan, To increase safety and convenience.

In order to achieve the above description, the present invention provides an off-pot monitoring device for a gas furnace, which is installed in a gas burner, and includes a temperature sensor, a micro switch, a linkage mechanism, and a control circuit. The temperature sensor is vertically and telescopically disposed on the gas burner head for contacting the bottom of a pot and sensing the temperature of the pot; the micro switch is disposed below the gas burner; the linkage a mechanism disposed between the temperature sensor and the micro switch, wherein a bottom of the pot can be pressed against or away from the temperature sensor, so that the temperature sensor can be correspondingly touched or released through the linkage mechanism The micro switch is configured to generate a switching signal; the control circuit is electrically coupled to the temperature sensor and the micro switch to determine whether the pot is pressed against the temperature sensor according to the switching signal, thereby controlling A fire switch to adjust the firepower of the gas burner.

In order to achieve the above description, the present invention also provides a method for monitoring a pan of a gas furnace, comprising: providing an off-pot monitoring device installed on a gas burner, wherein the pan monitoring device comprises a temperature sensor and a micro-motion The temperature sensor and the micro switch are respectively electrically coupled to the control circuit, and the temperature sensor is vertically and telescopically disposed on the gas burner, the micro switch Provided below the gas burner head, the linkage mechanism is disposed between the temperature sensor and the micro switch, so that the bottom of the pot can be pressed against or away from the temperature sensor, thereby enabling the temperature sensor to Correspondingly, the micro switch is activated or released by the linkage mechanism to generate a switching signal; according to the switching signal, it is determined whether the pot is pressed against the temperature sensor; if it is determined that the pot is not pressed against the temperature sense The detector controls the fire switch to maintain the firepower of the gas burner, and starts counting for a first preset time, and continuously determines, according to the switching signal, whether the pan is pressed against the temperature during the first preset time a sensor; if it is determined that the pot is not pressed against the temperature sensor within the first preset time, controlling the fire switch to reduce the firepower of the gas burner, and starting to count a second preset And determining, according to the switching signal, whether the pot is pressed against the temperature sensor during the second predetermined time; and determining that the pot is not pressed against the temperature sensor during the second predetermined time , then turn off the fire switch.

In summary, the off-pot monitoring device and the off-pot monitoring method of the gas furnace of the present invention can not only contact the bottom of the pan and sense the temperature of the pan by the temperature sensor, but also can be pressed by the pan. Or leaving the temperature sensor, so that the temperature sensor can correspondingly touch or release the micro switch through the linkage mechanism to generate the switching signal to the control circuit, and can effectively determine whether the pot leaves the pot device or the pot device And then automatically switch firepower with the movement of the pot to increase safety and convenience.

100‧‧‧Off-pot monitoring device

1‧‧‧ gas burner

2‧‧‧ pot device

3‧‧‧temperature sensor

31‧‧‧Sense head

32‧‧‧Flexible components

4‧‧‧ micro switch

5‧‧‧ linkage agency

50‧‧‧First body

51‧‧‧Second body

52‧‧‧Support

6‧‧‧Control circuit

7‧‧‧ Flame Sensor

8‧‧‧ pots

9‧‧‧Fire switch

T1‧‧‧First preset time

T2‧‧‧Second preset time

S201~S215‧‧‧Steps

1 is a perspective view of a pan monitoring device of a gas furnace of the present invention.

2 is a schematic plan view of the off-pot monitoring device of the gas furnace of the present invention.

Fig. 3 is a schematic plan view showing the state of use of the off-gas monitoring device of the gas furnace of the present invention.

Figure 4 is a block diagram showing the electrical function of the off-pot monitoring device of the gas furnace of the present invention.

FIG. 5 is a schematic flow chart of a method for monitoring a pan of a gas furnace according to the present invention.

In order to further understand the features and technical contents of the present invention, it will be explained by the schema. The invention will be described in detail by way of examples of various examples of the invention. However, the inventive concept may be embodied in many different forms and should not be construed as being limited to the embodiments illustrated herein. Therefore, the present invention is not limited to the embodiments, and the present invention is not limited to any embodiment, and the present invention is not limited to any embodiment. The scope of the patent application and its equivalent fields are attached.

Referring to FIG. 1 to FIG. 4 , the present invention provides a gas separation monitoring device 100 for a gas furnace, which is installed on a gas burner head 1 , and a gas storage device 2 can be disposed on the periphery of the gas burner 1 . It is a device such as a hob to facilitate the placement of the pan 8. Since the gas burner head 1 and the pot placing device 2 belong to the prior art, and the present invention does not limit the type and structure of the gas burner head 1 and the pot placing device 2, the description thereof will not be repeated.

The off-cup monitoring device 100 includes a temperature sensor 3, a micro switch 4, a linkage mechanism 5, and a control circuit 6. The off-cup monitoring device 100 can also include a flame sensor 7 for electrically coupling the flame sensor 7, the temperature sensor 3, and the micro switch 4 to the control circuit 6, respectively. Further, the flame sensor 7 can be, for example, a flame sensing needle or other flame detecting component, and the flame sensor 7 can be disposed near the gas burner 1 so that the flame sensor 7 can be adjacent to the fire. The position, and the position where the flame sensor 7 is actually set is not limited and can be appropriately changed. The flame sensor 7 is configured to sense the flame of the gas burner 1 and output a flame signal to the control circuit 6 according to the sensing result, and the control circuit 6 is configured to determine whether there is a flame according to the flame signal output by the flame sensor 7. And when it is judged that there is no flame, a fire switch 9 is turned off to cut off the supply of gas. The fire switch 9 can include a fire switch component such as a switch knob, an electronic igniter, and a solenoid valve. The present invention does not limit the type and configuration of the fire switch 9, and therefore will not be described again.

The temperature sensor 3 can be a thermocouple, a thermal resistor, a thermo-sensitive or other electronic temperature sensing element. The temperature sensor 3 has a sensing head 31, and the sensing head 31 Provided on the gas burner head 1, the sensing head 31 is preferably, but not limited to, disposed at the center of the gas burner head 1, and the sensing head 31 can protrude from the top of the potting device 2. The sensing head 31 can be used to contact the bottom of the pot 8 to sense the temperature of the user cooking the food pot. When the temperature is abnormal, a signal can be sent to the control circuit 6, and the control circuit 6 has an execution program. Through the analysis, induction and sorting of the program, steps such as overheat detection can be performed to cut off the supply of gas instead of empty burning to ensure safety and prevent fire. The control circuit 6 may include a control chip and a driving circuit such as a microprocessor (MCU), a microcontroller, or a digital signal processor (DSP), but is not limited thereto.

The inner side of the temperature sensor 3 may be provided with an elastic member 32 for elastically supporting the temperature sensor 3. The configuration of the elastic member 32 is not limited, and may be a spring or a spring piece. The elastic member 32 abuts against the temperature sensor 3 to keep the sensing head 31 of the temperature sensor 3 attached to the bottom of the pot 8. Specifically, one end of the elastic member 32 can be abutted against the temperature sensor 3, so that the temperature sensor 3 can be disposed on the gas burner 1 in an up-and-down manner, and the temperature sensor 3 can be The sensing head 31 protrudes from the top of the potting device 2. When the bottom of the pot 8 is pressed against the sensing head 31 of the temperature sensor 3, the temperature sensor 3 can be moved downward, and the feeling of the temperature sensor 3 is sensed by the elastic force of the elastic member 32. The probe 31 remains attached to the bottom of the pan 8 to detect the temperature of the bottom of the pan 8 by the temperature sensor 3.

The micro switch 4 is disposed below the gas burner head 1, so that the micro switch 4 can be away from the fire position, and the position where the micro switch 4 is actually disposed is not limited, and can be appropriately changed. In the present embodiment, the micro switch 4 is disposed below the gas burner 1 and is located outside the gas burner 1 so that the micro switch 4 can be further away from the fire to increase the service life of the micro switch 4.

The linkage mechanism 5 is disposed between the temperature sensor 3 and the micro switch 4, and when the bottom of the pot 8 is pressed against the sensing head 31 of the temperature sensor 3, the temperature sensor 3 is made downward. When moving, the temperature sensor 3 can touch the micro switch 4 through the linkage mechanism 5 to generate a switching signal to the control circuit 6. The configuration of the interlocking mechanism 5 is not limited, and may be used to touch the micro switch 4 as long as it is disposed between the temperature sensor 3 and the micro switch 4. In this embodiment, the linkage mechanism 5 includes a first rod body 50, a second rod body 51 and a support member 52. One end of the second rod body 51 is connected to the lower end of the first rod body 50, and the second rod body 51 is The other end is adjacent to the micro switch 4, and the second rod 51 and the support member 52 can constitute a lever mechanism for touching the micro switch 4. Therefore, when the bottom of the pot 8 is pressed against the sensing head 31 of the temperature sensor 3, and the temperature sensor 3 is moved downward, the temperature sensor 3 can push the first rod 50 to make the first The rod body 50 is moved downward, so that one end of the second rod body 51 can be oscillated downward, and the other end of the second rod body 51 can be swung upward to thereby touch the micro switch 4. In addition, the micro switch 4 can be a normally closed or normally open type micro switch, and can generate a high voltage level or a low voltage level switching signal to the control circuit 6 by forming an on state or an off state. For example, when the pot 8 is pressed against the temperature sensor 3, the linkage mechanism 5 is caused to touch the micro switch 4, and a high voltage level switching signal can be generated to the control circuit 6, and when the pot 8 is not pressed against the temperature sense At the time of the detector 3, that is, when the pot 8 leaves the temperature sensor 3, the interlocking mechanism 5 releases the micro switch 4, and a low voltage level switching signal can be generated to the control circuit 6. Therefore, the control circuit 6 can determine whether the pot 8 is pressed against the temperature sensor 3 according to the switching signal, thereby controlling the fire switch 9 to adjust the fire power of the gas burner 1.

The control circuit 6 can determine whether the pot 8 is pressed against the temperature sensor 3 according to the switching signal, and then control the fire switch 9 to adjust the fire power of the gas burner 1, as follows: when the control circuit 6 determines that the pot 8 is not pressed When the temperature sensor 3 is pressed, the control circuit 6 controls the fire switch 9 to maintain the fire power of the gas burner 1, and the control circuit 6 starts counting for a first preset time T1 (for example, 5 seconds), and is in the first It is determined whether the pot 8 is pressed against the temperature sensor 3 according to the switching signal during the time T1. Furthermore, when the control circuit 6 determines that the pot 8 has not pressed against the temperature sensor 3 within the first preset time T1 When the pot 8 is not set back to the pot setting device 2 when the first preset time T1 expires or when the count is down to zero, the control circuit 6 controls the fire switch 9 to reduce the gas burner. The firepower of 1 and the control circuit 6 starts counting for a second preset time T2 (for example, 1 minute), and continuously determines whether the pan 8 is pressed against the temperature sensor 3 according to the switching signal during the second preset time T2. Moreover, when the control circuit 6 determines that the pot 8 has been pressed against the temperature sensor 3 within the second preset time T2, that is, the pot 8 has been reset back to the pot setting device within the second preset time T2. When 2 is up, the control circuit 6 controls the fire switch 9 to increase the heating power of the gas burner 1. On the contrary, when the control circuit 6 determines that the pot 8 has not been pressed against the temperature sensor 3 within the second preset time T2, that is, the pot 8 has not been set back in the second preset time T2. On the device 2, the control circuit 6 turns off the fire switch 9 to cut off the supply of gas. Thereby, the pan monitoring device 100 can instantly monitor the pan 8 on the pan device 2 to achieve protection from the pan to increase safety.

According to the above embodiment, the present invention can be applied to a method for monitoring the separation of the gas stove, which is suitable for the above-mentioned embodiment. Please refer to Figure 5, and please refer to Figure 1 to Figure 4 as appropriate. FIG. 5 is a schematic flow chart of a method for monitoring a pan of a gas furnace according to an embodiment of the present invention.

First, in step S201, an off-pot monitoring device 100 is provided. Further, the off-pot monitoring device 100 is mounted on the gas burner head 1, and the off-pot monitoring device 100 includes a temperature sensor 3, a micro switch 4, a linkage mechanism 5, and a control circuit 6. The off-gas monitoring device 100 can also include a flame sensor 7, and the flame sensor 7, the temperature sensor 3 and the micro switch 4 are electrically coupled to the control circuit 6, respectively. The temperature sensor 3 is disposed on the gas burner head 1 in a vertically movable manner. The micro switch 4 is disposed below the gas burner head 1. The linkage mechanism 5 is disposed between the temperature sensor 3 and the micro switch 4 to make a pot. The bottom of the 8 can be pressed against or away from the temperature sensor 3, so that the temperature sensor 3 can correspondingly touch or release the micro switch 4 through the linkage mechanism 5 to generate a switching signal. number.

Then, in step S203, a fire switch 9 is turned on to cause the gas burner 1 to burn.

Then, in step S205, the gas burner 1 is sensed by the flame sensor 7 to determine whether the gas burner 1 has a flame. Further, the control circuit 6 can drive the flame sensor 7 to sense the gas burner 1 to determine whether the gas burner 1 has a flame. If the control circuit 6 determines that the gas burner 1 has no flame based on the electric signal generated by the flame sensor 7, step S206 is performed. On the other hand, if the control circuit 6 determines that there is a flame in the gas burner 1 based on the electric signal generated by the flame sensor 7, step S207 is performed.

In step S206, the fire switch 9 is turned off to cut off the supply of gas.

In step S207, based on the switching signal, it is determined whether the pan 8 is pressed against the temperature sensor 3. Further, the control circuit 6 can determine whether the pot 8 is pressed against the temperature sensor 3 according to the switching signal. If the control circuit 6 determines that the pot 8 has pressed against the temperature sensor 3 based on the switching signal, it jumps back to step S205. On the other hand, if the control circuit 6 determines that the pot 8 has not pressed against the temperature sensor 3 based on the switching signal, step S208 is performed.

In step S208, counting starts for a first preset time T1 (for example, 5 seconds), and step S209 is performed. Further, in a counting operation state for a short time, the control circuit 6 can perform opening degree control on the solenoid valve of the fire switch 9 to control the solenoid valve of the fire switch 9 to maintain a predetermined opening degree to maintain the supply of gas. The flow rate, in turn, maintains the firepower of the gas burner 1 at the original optimum firepower.

In step S209, it is continuously determined according to the switching signal to determine whether the pot 8 has been pressed against the temperature sensor 3 within the first preset time T1. If the control circuit 6 determines that the pot 8 has been pressed against the temperature sensor 3 within the first preset time T1 according to the switching signal, then the process jumps back to step S205. On the contrary, if the control circuit 6 determines that the pot 8 has not pressed against the temperature sensor 3 within the first preset time T1 according to the switching signal, step S211 is performed.

In step S211, the fire switch 9 is controlled to reduce the firepower of the gas burner 1. And starting to count a second preset time T2 (for example, 1 minute), step S213 is performed. Further, in the counting operation state for a long time, the control circuit 6 can perform opening degree control on the solenoid valve of the fire switch 9 to reduce the flow rate of the gas entering the pipeline, thereby adjusting the firepower of the gas burner 1 to The most appropriate less firepower.

In step S213, the switching signal is continuously determined to determine whether the pot 8 has been pressed against the temperature sensor 3 within the second preset time T2. If the control circuit 6 determines that the pot 8 has been pressed against the temperature sensor 3 within the second preset time T2 according to the switching signal, step S214 is performed. On the contrary, if the control circuit 6 determines that the pot 8 has not pressed against the temperature sensor 3 within the second preset time T2 according to the switching signal, step S215 is performed.

In step S214, the fire switch 9 is controlled to increase the heating power of the gas burner 1, and the process returns to step S205. Further, the control circuit 6 can control the opening of the solenoid valve of the fire switch 9 to increase the flow rate of the gas entering the pipeline, thereby adjusting the fire power of the gas burner 1 to the most appropriate large fire force, and then performing the re-operation. Cooking.

In step S215, the fire switch 9 is turned off to cut off the supply of gas, thereby turning off the gas burner 1 to surely achieve protection from the pan to increase safety.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, the equivalent changes of the present invention and the contents of the drawings are all included in the protection of the present invention. Within the scope, it is combined with Chen Ming.

1‧‧‧ gas burner

3‧‧‧temperature sensor

31‧‧‧Sense head

32‧‧‧Flexible components

4‧‧‧ micro switch

5‧‧‧ linkage agency

50‧‧‧First body

51‧‧‧Second body

52‧‧‧Support

8‧‧‧ pots

Claims (5)

An off-pot monitoring device for a gas stove is installed on a gas burner head, and the off-pot monitoring device comprises: a temperature sensor, which is vertically and telescopically arranged on the gas burner head for contacting the bottom of a pot and sensing The temperature of the pot; a micro switch disposed under the gas burner; a linkage mechanism disposed between the temperature sensor and the micro switch, wherein the bottom of the pot can press or leave the temperature a sensor, so that the temperature sensor can correspondingly touch or release the micro switch through the linkage mechanism to generate a switching signal; and a control circuit electrically coupled to the temperature sensor and the micro switch And determining, according to the switching signal, whether the pot is pressed against the temperature sensor, and then controlling a fire switch to adjust the firepower of the gas burner; wherein the control circuit determines that the pot is not pressed against the temperature sense When the detector is used, the control circuit controls the fire switch to maintain the fire power of the gas burner, and the control circuit starts counting for a first preset time, and continues to follow the switching signal during the first preset time. Destroying whether the pot is pressed against the temperature sensor; wherein when the control circuit determines that the pot is not pressed against the temperature sensor within the first predetermined time, the control circuit controls the fire switch to reduce The firepower of the gas burner is small, and the control circuit starts counting for a second predetermined time, and continuously determines, according to the switching signal, whether the pan is pressed against the temperature sensor during the second predetermined time, wherein The second preset time is greater than the first preset time. The off-gas monitoring device of the gas furnace of claim 1, wherein the control circuit turns off the fire switch when the control circuit determines that the pot is not pressed against the temperature sensor within the second predetermined time. . The off-gas monitoring device of the gas furnace of claim 1, wherein the control circuit controls the fire switch when the control circuit determines that the pot has been pressed against the temperature sensor within the second predetermined time. To increase the firepower of the gas burner. A method for monitoring a pan of a gas furnace comprises: providing an off-pot monitoring device installed on a gas burner, wherein the pan monitoring device comprises a temperature sensor, a micro switch, a linkage mechanism and a control circuit, the temperature sensing And the micro-switch is electrically coupled to the control circuit, and the temperature sensor is vertically disposed on the gas burner, the micro-switch is disposed under the gas burner, and the linkage is disposed at the Between the temperature sensor and the micro switch, the bottom of the pot can be pressed against or away from the temperature sensor, so that the temperature sensor can correspondingly touch or release the micro switch through the linkage mechanism to generate a switching signal; determining whether the pot is pressed against the temperature sensor according to the switching signal; if it is determined that the pot is not pressed against the temperature sensor, controlling the fire switch to maintain the firepower of the gas burner And starting to count a first preset time, and continuously determining, according to the switching signal, whether the pot is pressed against the temperature sensor during the first preset time; if the pot is determined to be the first If the temperature sensor is not pressed in a predetermined time, the fire switch is controlled to reduce the firepower of the gas burner, and the counting starts for a second preset time, and continues according to the switch for the second predetermined time. The signal determines whether the pot is pressed against the temperature sensor; and if it is determined that the pot is not pressed against the temperature sensor within the second predetermined time, the fire switch is turned off. The method for monitoring the pan of the gas furnace according to claim 4, further comprising: if it is determined that the pot has been pressed against the temperature sensor within the second set time, controlling the fire switch to increase the gas burner Firepower.