CN212627301U

CN212627301U - Cooking utensil

Info

Publication number: CN212627301U
Application number: CN202020587202.1U
Authority: CN
Inventors: 徐俊杰; 李泽涌
Original assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Current assignee: Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
Priority date: 2020-04-18
Filing date: 2020-04-18
Publication date: 2021-02-26
Anticipated expiration: 2030-04-18

Abstract

The utility model discloses a cooking utensil. The cooking appliance includes: the weight sensor is electrically connected with the controller, the controller comprises a collecting unit for collecting weight signals, a notifying unit and an external power supply module, and the external power supply module is electrically connected with the controller; the mains supply voltage detection module is used for detecting a voltage value to judge whether mains supply is available for supplying power to the cooking appliance; the controller is configured to switch the external power supply module to supply power to the acquisition unit and the notification unit when commercial power does not supply power to the cooking appliance. According to the utility model discloses a cooking utensil, through setting up external power supply module, can be through the collection unit of external power supply module to the controller and the power supply of informing unit under the condition that does not have the commercial power to supply power for cooking utensil to satisfy user's demand.

Description

Cooking utensil

Technical Field

The utility model relates to a cooking utensil technical field especially relates to a cooking utensil.

Background

The prior cooking utensil (rice cooker) can calculate the calorie of food taken by a user and inform the user of the obtained information such as the calorie value in a voice prompt or display mode. However, the functions such as prompting calorie information are realized only after the cooking appliance is connected to a power socket (commercial power). However, some users are used to pull out the power plug after the cooking process is finished (the rice cooker can be moved to a dining table conveniently for containing rice), and in this case, the functions of acquiring the calorie information of the rice cooker, sending corresponding prompts to the users and the like cannot be used, so that bad use experience is easily caused to the users.

Therefore, there is a need to provide a cooking appliance to at least partially solve the above problems.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

The utility model provides a cooking utensil, include:

a weight sensor for measuring the weight of the object,

a controller electrically connected with the weight sensor, the controller comprises a collecting unit for collecting weight signals and a notification unit,

the external power supply module is electrically connected with the controller; and

the mains supply voltage detection module is used for detecting a voltage value to judge whether mains supply is available for supplying power to the cooking appliance;

the controller is configured to switch the external power supply module to supply power to the acquisition unit and the notification unit when commercial power does not supply power to the cooking appliance.

According to the utility model discloses a cooking utensil, through setting up external power supply module, can carry out the load power supply of work to needs through external power supply module under the condition that does not have the commercial power to supply power for cooking utensil to satisfy user's demand.

Preferably, the controller further comprises a calorie coefficient acquisition unit and a calorie calculation unit, and the controller is configured to switch the external power module to supply power to the calorie coefficient acquisition unit and the calorie calculation unit when the commercial power does not supply power to the cooking appliance.

Thereby, calorie information can be provided to the user without the commercial power supplying the cooking appliance.

Preferably, the mains voltage detection module is a first voltage detection circuit built in the controller to detect a power supply voltage of the controller.

Therefore, the first voltage detection circuit is arranged in the controller, and the production cost of the cooking appliance can be saved.

Preferably, the external power module is any one of a dry battery, a storage battery and a solar battery.

Therefore, diversification of the cooking appliance can be realized to meet the requirements of users.

Preferably, the power supply further comprises an external power supply voltage detection module, wherein the external power supply voltage detection module is used for detecting a voltage value to judge whether the electric quantity of the external power supply module is sufficient.

Therefore, by arranging the external power supply voltage detection module, the state of the external power supply module can be monitored, so that the normal work of some loads can be still ensured under the condition that the cooking utensil is not accessed to the commercial power, and the user requirements are met.

Preferably, the external power supply voltage detection module is configured to detect a voltage value to determine whether the electric quantity of the external power supply module is sufficient or not in a process that the commercial power supplies power to the cooking appliance.

Therefore, inconvenience brought to a user due to insufficient electric quantity of the external power supply module when no commercial power is connected to the cooking appliance can be avoided.

Preferably, the controller is configured to send a prompt signal when the external power supply voltage detection module determines that the electric quantity of the external power supply module is lower than a preset value.

Therefore, the controller can remind the user when the electric quantity of the external power supply is insufficient.

Preferably, the external power module is a dry battery, the cooking utensil further comprises a first prompt module, the first prompt module is connected with an output end of the controller, and the controller is configured to: when the dry battery supplies power to the cooking utensil, under the condition that the voltage value detected by the external power supply voltage detection module is lower than a first preset threshold value, the first prompt module is controlled to send out prompt information of insufficient electric quantity and/or external power supply replacement.

From this, external power supply module is the dry battery, and when the dry battery electric quantity was not enough, first suggestion module can send corresponding prompt message and remind the user to change.

Preferably, the external power supply module is a storage battery, and the cooking appliance further comprises a charging circuit for charging the storage battery; the controller is configured to: and under the condition that the voltage value detected by the external power supply voltage detection module is lower than a second preset threshold value, controlling the charging circuit to charge the storage battery.

Therefore, the external power supply module is a storage battery, when the electric quantity of the storage battery is insufficient, the storage battery can be charged under the condition that the cooking appliance is powered by the mains supply, and the normal work of the load driven by the controller under the condition that the cooking appliance is not connected into the mains supply is guaranteed, so that the user requirements are met.

Preferably, the charging circuit comprises a charging chip, and the charging chip comprises a feedback pin, and the feedback pin is connected with the anode of the storage battery.

Therefore, under the condition that the cooking appliance is connected with commercial power, if the electric quantity of the storage battery is insufficient, the charging chip can store the electric quantity of the storage battery.

Preferably, the external power supply voltage detection module is connected with an analog-to-digital (AD) detection port of the controller, so as to detect the working voltage of the storage battery.

Thus, the operating voltage of the battery can be detected in real time through the analog-to-digital conversion AD detection port.

Preferably, the external power supply voltage detection module comprises a triode and a current-limiting resistor, an emitter of the triode is connected with the anode of the storage battery, a collector of the triode is connected with the analog-to-digital conversion AD detection port, and a base of the triode is connected with an I/O port of the controller through the current-limiting resistor.

Therefore, the circuit logic is clear, and the controller response is fast.

Preferably, the external power module is a solar battery, the solar battery is disposed at a photosensitive position of the cooking appliance, and the controller is configured to: and under the condition that the voltage value detected by the external power supply voltage detection module is lower than a third preset threshold value, controlling a built-in charging module of the solar battery to charge.

Therefore, under the condition that the cooking appliance is not connected with the mains supply, the normal work of the load driven by the controller is ensured so as to meet the user requirements.

Preferably, the controller switches to a low power consumption mode when the external power module supplies power to a load which needs to work.

Therefore, the working time of the cooking appliance can be prolonged, and the requirements of users can be met.

Drawings

The following drawings of the present invention are used herein as part of the present invention for understanding the present invention. There are shown in the drawings, embodiments and descriptions of the invention, which are used to explain the principles of the invention.

In the drawings:

fig. 1 is a perspective view of a cooking appliance according to a preferred embodiment of the present invention;

fig. 2 is a block diagram of a cooking appliance according to a preferred embodiment of the present invention;

fig. 3 is a schematic control circuit diagram of a cooking appliance according to a preferred embodiment of the present invention;

fig. 4 is a schematic diagram of a charging circuit for a cooking appliance using a solar cell to charge a storage battery according to another embodiment of the present invention;

fig. 5 is a flowchart illustrating a control method for a cooking appliance according to a preferred embodiment of the present invention.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring embodiments of the present invention.

It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

Exemplary embodiments according to the present invention will now be described in more detail with reference to the accompanying drawings. These exemplary embodiments may, however, be embodied in many different forms and should not be construed as limited to only the embodiments set forth herein. It is to be understood that these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of these exemplary embodiments to those skilled in the art. In the drawings, the thicknesses of layers and regions are exaggerated for clarity, and the same elements are denoted by the same reference numerals, and thus the description thereof will be omitted.

The utility model provides a control method, control circuit and cooking utensil for cooking utensil. The cooking appliance of the utility model can be an electric cooker, an electric pressure cooker, etc.

A cooking appliance 100 according to a preferred embodiment of the present invention will be described with reference to fig. 1. As shown in fig. 1, the cooking appliance 100 may include a pot body 110 and a cover 120. The pot body 110 may have an inner pot receiving part in a cylindrical shape (or other shapes), and an inner pot (not shown) may be freely put into or taken out of the inner pot receiving part to facilitate cleaning of the inner pot.

The cover 120 may be pivotally connected to the pot body 110 by a pivot shaft for covering the pot body 110, and when the cover 120 is covered to the pot body 110, a cooking space is formed between the cover 120 and the inner pot.

The main control circuit board 130 is disposed in the pot body 110. As shown in fig. 2, specifically, a controller 131 is disposed on the main Control circuit board 130, and the controller 131 may be a Micro Control Unit (MCU) in one embodiment, and is used to implement cooking Control on the cooking appliance 100, specifically, to drive a load to work. The load may be understood to include a heating device (not shown in the figures) for heating the inner pot, a weighing module 140 for weighing food material in the inner pot (in one embodiment, the weighing module 140 may be a weight sensor), a temperature detection module for detecting a cooking temperature in the inner pot, and the like.

The main control circuit board 130 further includes a mains voltage detection module, which is configured to detect a voltage value to determine whether there is mains power to supply power to the cooking appliance 100. The utility voltage detection module may be a first voltage detection circuit built in the MCU, i.e., a low voltage detection circuit (i.e., the LPD circuit) built in the MCU. The voltage value of the VDD port of the MCU may be detected by the first voltage detection circuit, and if the detected voltage value is higher than a set value, it indicates that the power plug of the cooking appliance 100 has been connected to the commercial power socket and is powered by the commercial power; if the detected voltage value is lower than the set value, it indicates that the power plug of the cooking appliance 100 is not plugged into the commercial power socket. Exemplarily, referring to fig. 3, the operating voltage of the MCU is 5V (5V refers to the dc power voltage obtained by rectifying, filtering, and stepping down the ac mains supply); the 5V power supply voltage generates about 0.4V voltage drop after passing through the diode D201; when there is commercial power to supply power to the controller 131, the actual power voltage of the controller 131 is about 4.6V, and then the setting value may be set to 4.2V (LPD detection voltage setting value), so that when the voltage value detected by the commercial power voltage detection module is higher than 4.2V, an internal flag is generated, and the controller 131 detects that the internal flag is equal to 1, and considers that there is commercial power, otherwise, the internal flag is equal to 0, and there is no commercial power.

It is understood that the LPD may be programmed by software to set a voltage threshold for the low voltage detection (LPD detection voltage set value), the voltage threshold for the low voltage detection has a plurality of steps, and one of the voltage thresholds may be selected as the voltage threshold for the low voltage detection, for example: one of the values of 3.75V, 3.9V, 4.05V, 4.2V, 4.35V, and the like may be selected, and in the present embodiment, 4.2V is selected as the voltage threshold for low voltage detection, as described above.

With continued reference to fig. 2 and 3, the cooking appliance 100 of the present invention further includes an external power module electrically connected to the controller 131. The controller 131 is configured to switch the external power module to supply power to a load that needs to work when the commercial power does not supply power to the cooking appliance 100.

Therefore, by arranging the external power supply module, the load which needs to work can be supplied by the external power supply module under the condition that no commercial power supplies power to the cooking appliance 100, so that the user requirements are met.

It can be understood that the controller 131 can be switched to the low power consumption mode when the external power module supplies power to a load that needs to work, and can be switched to the normal mode when the commercial power is restored.

The main control circuit board 130 may further include an external power voltage detection circuit, and the external power voltage detection module is configured to detect a voltage value to determine whether the electric quantity of the external power module is sufficient, so that the state of the external power module can be monitored, and the cooking appliance 100 can still ensure normal operation of some loads under the condition that the commercial power is not accessed, so as to meet the user demand. Further, the controller 131 may be configured to send a prompt signal to the prompt module when the external power voltage detection module determines that the electric quantity of the external power module is lower than the preset value. Therefore, the user can be informed of the shortage of the electric quantity in time.

More specifically, the external power voltage detection module may be configured to detect a voltage value during the process of supplying the electric power to the cooking appliance 100 by the commercial power to determine whether the electric quantity of the external power module is sufficient. Therefore, inconvenience brought to a user due to insufficient electric quantity of the external power supply module when no commercial power is connected to the cooking appliance 100 can be avoided.

In one embodiment, the external power module may be a dry cell battery. Correspondingly, the cooking appliance 100 may further include a first prompting module 151, such as a buzzer. The first prompt module 151 is connected to an output of the controller 131. The controller 131 may be configured to: when the dry battery supplies power to the cooking appliance 100, the first prompt module 151 is controlled to generate prompt information of insufficient power and/or replacement of the external power supply under the condition that the voltage value detected by the external power supply voltage detection module is lower than the first preset threshold value.

Therefore, when the electric quantity of the dry battery is insufficient (namely the voltage value detected by the external power supply voltage detection circuit does not reach the first preset threshold), the buzzer can send out corresponding prompt information (long sound 1s) to remind a user to replace the dry battery.

In another embodiment, the external power module may be a battery. Correspondingly, the main control circuit board 130 may further include a charging circuit (as shown in fig. 3) for charging the storage battery. The controller 131 may be configured to: and under the condition that the voltage value detected by the external power supply voltage detection module is lower than a second preset threshold value, controlling the charging circuit to charge the storage battery.

Therefore, it can be understood that when the battery is low (i.e. the voltage value detected by the external power supply voltage detection circuit does not reach the second preset threshold), the battery can be charged by the commercial power through the charging circuit. Therefore, when the electric power is not supplied to the commercial power, the cooking appliance 100 can supply power through the storage battery, and the normal operation of the load driven by the controller 131 is ensured to meet the user demand.

Specifically, as shown in fig. 3 and 4, the charging circuit mainly includes a charging chip U1. The +5V in the charging circuit is the direct-current power supply voltage obtained by rectifying, filtering and reducing the alternating-current mains supply, wherein the filter capacitor C1 mainly plays a role in filtering, and the resistor R1 and the resistor R2 play a role in voltage division. The TEMP pin of the charging chip U1, i.e. the temperature detection pin of the charging chip U1, is connected to one end of the thermistor NTC for temperature detection. The BAT pin of the charging chip U1, i.e., the feedback pin of the charging chip U1, is connected to the positive electrode of the battery BT 1. The battery BT1 supplies power to the controller 131 via the diode D3.

With continued reference to fig. 3, the external power supply voltage detection circuit is connected to an analog-to-digital conversion AD detection port (the 11 th pin of the MCU in the figure) of the controller 131, for detecting the operating voltage of the battery BT 1. Specifically, as shown in fig. 3, the external power supply voltage detection module includes a transistor Q1 and a current-limiting resistor R5, an emitter of the transistor Q1 is connected to the positive electrode of the battery BT1, a collector of the transistor Q1 is connected to the AD detection port, and a base of the transistor Q1 is connected to the I/O port (the 12 th pin of the MCU in the figure) of the controller 131 through the current-limiting resistor R5. Transistor Q3 enables controller 131 to consume as little as possible of battery BT 1.

For example, the MCU sets the port P3.3 (pin 12) to low level 1 time at intervals (e.g. 1 hour), so that the transistor Q1 is turned on, and the voltage of the positive electrode of the battery BT1 reaches the port P3.4 (pin 11) through the transistor Q1, at which time the MCU can detect the voltage of the battery BT 1. When the port P3.4 (pin 11) detects that the voltage of the storage battery BT1 is low, the MCU sets the port P3.0 (pin 15) to be low level, so that the triode Q2 is conducted, the charging circuit obtains a 5V power supply, and the storage battery BT1 is charged.

It can be understood that the charging current of the charging circuit can be reduced to 1/10 of the set value after the P3.4 port (pin 11) detects that the voltage of the battery BT1 reaches the second preset threshold, and the charging chip U1 will automatically terminate the charging cycle. The charging current of the charging circuit can be set through the external resistor R3, and the magnitude of the charging current can be changed by adjusting the magnitude of the external resistor R3.

Of course, in another embodiment, the battery BT1 may be charged by a solar cell. The specific charging principle can be understood with reference to fig. 4.

For example, the solar cell BT2 in fig. 4 may provide a voltage of 6V, and the charging chip U1 (LT1073) detects a charging current via a 13 Ω resistor (i.e., resistor R11), and maintains a fixed charging current in the battery BT 1. A second voltage detection circuit (LPD) built in the charging chip U1 turns off the charging circuit when the output voltage of the solar battery BT2 drops to 4V; when the output voltage of the solar battery BT2 rises to above 5V, the charging chip U1 works normally to charge the storage battery BT 1. When the first voltage detection circuit (LPD) built in the controller 131 detects that the commercial power is disconnected, the battery BT1 supplies power to the product.

In yet another embodiment, the external power module may be a solar cell, which is generally mounted on the outer surface of the cooking appliance to facilitate receiving light. The controller 131 may be configured to: and under the condition that the voltage value detected by the external power supply voltage detection module is lower than a third preset threshold value, controlling a built-in charging module of the solar battery to charge. Therefore, the cooking appliance can be powered by the solar battery under the condition that the commercial power is not connected, and the normal work of the load driven by the controller 131 is ensured, so that the user requirements are met.

Next, referring to fig. 2, 3, 4 and 5, a control process of the cooking appliance 100 will be described in detail by taking a load driven by the controller 131 as the weighing module 140 as an example.

Referring to fig. 2, the cooking appliance 100 includes a weighing module 140, and the weighing module 140 is used for detecting the weight of food materials in an inner pot of the cooking appliance 100. The weighing module 140 may be an electronic scale provided in the pot body 110. The controller 131 is electrically connected to the weighing module 140, and is configured to calculate the calorie content of the food according to the weight change of the food material in the inner pot, and may also directly display the weight value measured by the weighing module 140.

Specifically, the controller 131 may include a collecting unit that collects a weight signal, and a notification unit. Thereby, a prompting signal can be sent through the notification unit in order to control, for example, the prompting device to perform the relevant prompting. More specifically, the controller 131 may include a calculation unit and a calorie coefficient acquisition unit. The calorie coefficient obtaining unit is used for determining a corresponding calorie coefficient according to the current cooking food material information and the current cooking function information of the cooking appliance 100. The calorie coefficient can be obtained by establishing a corresponding relationship between the calorie coefficient and the cooking material information and the cooking function information in advance. The calculating unit is used for calculating the calorie amount of the food according to the acquired calorie coefficient and the weight change of the food material in the inner pot.

Further, the cooking appliance 100 may further include a second prompt module 152, and the second prompt module 152 is electrically connected to the controller 131 for outputting information of the calorie content of the food. The second prompting module 152 may be a display module, for example, displaying text and/or numbers.

As can be seen from fig. 3, after the cooking appliance 100 finishes cooking, the mains voltage detection module in the main control circuit board 130 detects the voltage value of the controller 131, and when the voltage is lower than a set value, it is determined that the power plug is pulled out from the mains socket. At this time, the power supply is switched to be supplied by an external power module (the calorie metering function circuit (the weighing module 140, the acquisition unit, the informing unit, the calorie coefficient obtaining unit, the calculating unit and the second prompting module 152) is supplied by the external power module), and if the controller 131 receives a calorie function instruction, the detected calorie result can be informed to the user; if the calorie function instruction is not received, the mains supply is ended by pulling out the power plug.

After the cooking appliance 100 finishes cooking, the mains voltage detection module in the main control circuit board 130 detects a voltage value, and when the voltage is not lower than a set value, it is determined that the power plug is not pulled out of the mains socket. At this time, the commercial power supply is still used for supplying power to the whole circuit of the cooking appliance 100, if a calorie function instruction is received, the commercial power supply is continuously used for supplying power to the calorie metering function, and the detected calorie result is informed to the user; if no calorie function instruction is received, the heat preservation/standby function is still maintained.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, and that many more modifications and variations are possible in light of the teaching of the present invention and are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A cooking appliance, characterized in that it comprises:

a weight sensor for measuring the weight of the object,

2. The cooking appliance according to claim 1, wherein the controller further comprises a calorie coefficient acquisition unit and a calorie calculation unit, and the controller is configured to switch the external power supply module to supply power to the calorie coefficient acquisition unit and the calorie calculation unit when commercial power does not supply power to the cooking appliance.

3. The cooking appliance according to claim 1, wherein the mains voltage detection module is a first voltage detection circuit built in the controller to detect a power supply voltage of the controller.

4. The cooking appliance according to claim 1, wherein the external power supply module is any one of a dry battery, a storage battery and a solar battery.

5. The cooking appliance according to claim 4, further comprising an external power voltage detection module, wherein the external power voltage detection module is configured to detect a voltage value to determine whether the power of the external power module is sufficient.

6. The cooking appliance according to claim 5, wherein the external power supply voltage detection module is configured to detect a voltage value to determine whether the power of the external power supply module is sufficient during the process of supplying the electric power to the cooking appliance by the mains power.

7. The cooking appliance according to claim 5, wherein the controller is configured to send a prompt signal when the external power supply voltage detection module determines that the power of the external power supply module is lower than a preset value.

8. The cooking appliance of claim 5, wherein the external power module is a dry battery, the cooking appliance further comprising a first prompting module connected to an output of the controller, the controller configured to: when the dry battery supplies power to the cooking utensil, under the condition that the voltage value detected by the external power supply voltage detection module is lower than a first preset threshold value, the first prompt module is controlled to send out prompt information of insufficient electric quantity and/or external power supply replacement.

9. The cooking appliance of claim 5, wherein the external power module is a battery, the cooking appliance further comprising a charging circuit for charging the battery; the controller is configured to: and under the condition that the voltage value detected by the external power supply voltage detection module is lower than a second preset threshold value, controlling the charging circuit to charge the storage battery.

10. The cooking appliance of claim 9, wherein the charging circuit comprises a charging chip including a feedback pin, the feedback pin being connected to a positive terminal of the battery.

11. The cooking appliance according to claim 9, wherein the external power voltage detection module is connected to an analog-to-digital (AD) detection port of the controller for detecting an operating voltage of the battery.

12. The cooking appliance according to claim 11, wherein the external power voltage detection module comprises a transistor and a current limiting resistor, an emitter of the transistor is connected to the positive electrode of the storage battery, a collector of the transistor is connected to the analog-to-digital (AD) detection port, and a base of the transistor is connected to the I/O port of the controller through the current limiting resistor.

13. The cooking appliance of claim 5, wherein the external power module is a solar cell disposed at a photosensible location of the cooking appliance, and wherein the controller is configured to: and under the condition that the voltage value detected by the external power supply voltage detection module is lower than a third preset threshold value, controlling a built-in charging module of the solar battery to charge.

14. The cooking appliance of claim 1, wherein the controller switches to a low power consumption mode when the load requiring work is powered by the external power module.