CN111380709B - Fault detection method of cooking utensil and cooking utensil - Google Patents

Fault detection method of cooking utensil and cooking utensil Download PDF

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Publication number
CN111380709B
CN111380709B CN201811622443.9A CN201811622443A CN111380709B CN 111380709 B CN111380709 B CN 111380709B CN 201811622443 A CN201811622443 A CN 201811622443A CN 111380709 B CN111380709 B CN 111380709B
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China
Prior art keywords
water
cooking
water pump
cooking appliance
water level
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CN111380709A (en
Inventor
樊杜平
陈建化
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Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
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Zhejiang Supor Electrical Appliances Manufacturing Co Ltd
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/005—Testing of complete machines, e.g. washing-machines or mobile phones
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/08—Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/09—Safety devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M99/00—Subject matter not provided for in other groups of this subclass
    • G01M99/007—Subject matter not provided for in other groups of this subclass by applying a load, e.g. for resistance or wear testing

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cookers (AREA)

Abstract

The invention provides a fault detection method of a cooking appliance and the cooking appliance. The method comprises the following steps: acquiring a first water level in the water tank during or before the water pump works; after a first water level in the water tank is obtained, after the water pump starts to work for a preset time, a second water level of the water tank is obtained; judging whether the difference value between the first water level and the second water level is larger than a preset value, if so, judging that the water channel between the water tank and the cooking space of the cooking utensil is normal, and if not, judging that the water channel is blocked. According to the fault detection method of the cooking utensil, in the working process of the water pump, whether the difference value between the first water level and the second water level is larger than the preset value is judged, and whether the water channel of the cooking utensil is blocked is further determined, so that a user can be timely notified when the water channel is blocked, and further damage to the cooking utensil is avoided.

Description

Fault detection method of cooking utensil and cooking utensil
Technical Field
The present invention relates generally to the field of electric heating appliances, and more particularly, to a failure detection method of a cooking appliance and a cooking appliance.
Background
The existing cooking utensil is provided with a water channel which is communicated with the cooking space and the internal accommodating cavity of the water tank. The cooking appliance conveys water in the water tank from the water course to the cooking space through the water pump. When the water channel is blocked, the cooking utensil can not automatically add water, so that subsequent cooking can not be performed. However, the cooking appliance of the prior art cannot detect whether the water channel is blocked.
Accordingly, there is a need to provide a failure detection method of a cooking appliance and a cooking appliance to at least partially solve the above-mentioned problems.
Disclosure of Invention
In the summary, a series of concepts in simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.
To at least partially solve the above technical problem, according to an aspect of the present invention, there is provided a fault detection method of a cooking appliance, the method including: acquiring a first water level in the water tank during or before the water pump works; after a first water level in the water tank is obtained, after the water pump starts to work for a preset time, a second water level of the water tank is obtained; judging whether the difference value between the first water level and the second water level is larger than a preset value, if so, judging that the water channel between the water tank and the cooking space of the cooking utensil is normal, and if not, judging that the water channel is blocked.
According to the fault detection method of the cooking utensil, in the working process of the water pump, whether the difference value between the first water level and the second water level is larger than the preset value is judged, and whether the water channel of the cooking utensil is blocked is further determined, so that a user can be timely notified when the water channel is blocked, and further damage to the cooking utensil is avoided.
Optionally, the preset value is a natural number greater than zero.
Optionally, the method further comprises: before the water pump is started to work, determining the cooking water quantity required by the cooking appliance to cook food materials; if the water channel is judged to be normal, judging whether the water quantity in the current cooking space is larger than or equal to the cooking water quantity, and if so, stopping the water pump. Therefore, the water pump is prevented from inputting excessive water into the cooking space, so that water in the cooking space overflows, or the cooked taste is prevented from being influenced due to excessive water quantity.
Optionally, the cooking water amount is determined according to the cooking mode and the kind and amount of food materials in the cooking space. Therefore, the cooking water amount is not required to be set by a user, and the operation is simple.
Optionally, the step of determining whether the current amount of water in the cooking space is greater than or equal to the cooking water amount includes: acquiring the real-time flow of the water pump in the working process of the water pump; determining the water quantity in the current cooking space according to the real-time flow of the water pump and the working time of the water pump; and judging whether the water quantity in the current cooking space is larger than or equal to the cooking water quantity. Therefore, the method for determining the water quantity in the current cooking space according to the real-time flow of the water pump and the working time of the water pump is simple, and meanwhile, the cooking appliance does not need to be provided with a device for determining the water quantity in the cooking space, and is simple in structure.
The invention also provides a fault detection method of the cooking utensil, which comprises the following steps: obtaining the working current of the water pump; if the working current of the water pump is larger than the preset current value, the water channel between the water tank and the cooking space of the cooking utensil is judged to be blocked, otherwise, the water channel is judged to be normal.
According to the fault detection method of the cooking utensil, in the working process of the water pump, whether the working current of the water pump is larger than the preset current value is judged, so that whether the water channel is blocked is determined, and when the water channel is blocked, a user can be timely notified, and further damage to the cooking utensil is avoided.
Optionally, the method further comprises the step of sending out reminding information if the water channel is judged to be blocked; if the water channel is judged to be normal, the heating device in the cooking utensil starts to work so as to heat the food materials in the cooking space. Thereby prompting the user when the water channel is blocked; when the water channel is normal, the cooking utensil cooks food materials in the cooking space.
The invention also provides a cooking appliance which comprises a water pump, a water tank and a controller, wherein the cooking appliance is provided with a water channel which is communicated with the internal accommodating cavity of the water tank and the cooking space of the cooking appliance, the controller is connected with the water pump so as to control the water pump to convey water in the water tank to the cooking space, and the controller uses the cooking appliance controlled by the fault detection method of the cooking appliance.
According to the cooking appliance, the controller of the cooking appliance uses the fault detection method of the cooking appliance, and in the working process of the water pump, whether the difference value between the first water level and the second water level is larger than a preset value is judged, so that whether the water channel of the cooking appliance is blocked is determined, and a user can be timely notified when the water channel is blocked, and further damage to the cooking appliance is avoided.
Optionally, the cooking appliance further comprises a reminder device configured to send out a reminder message when the water channel is blocked. Thus, the user is presented when the water passage is blocked.
Optionally, the cooking appliance is an electric rice cooker, an electric pressure cooker or an electric stew pot.
Drawings
In order that the advantages of the invention will be readily understood, a more particular description of the invention briefly described above will be rendered by reference to specific embodiments that are illustrated in the appended drawings. Understanding that these drawings depict only typical embodiments of the invention and are not therefore to be considered to be limiting of its scope, the invention will be described and explained with additional specificity and detail through the use of the accompanying drawings.
Fig. 1 is a flow chart illustrating a fault detection method of a cooking appliance according to a first preferred embodiment of the present invention;
fig. 2 is a schematic view of a cooking flow of the cooking appliance of fig. 1;
Fig. 3 is a schematic block diagram of a control system of a cooking appliance according to a first preferred embodiment of the present invention; and
Fig. 4 is a schematic structural view of a flow rate detecting and water adding module of the cooking appliance of fig. 3 (wherein a water pump, a flow rate sensor circuit board and a water channel are shown).
Reference numerals illustrate:
110: water pump 120: flow sensor
130: Water channel 131: water outlet channel
132: Inlet channel 140: flow sensor circuit board
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 details. In other instances, well-known features have not been described in detail in order to avoid obscuring the embodiments of the invention.
In the following description, a detailed structure will be presented for a thorough understanding of embodiments of the present invention. It will be apparent that embodiments of the invention may be practiced without limitation to the specific details that are set forth by those skilled in the art. Preferred embodiments of the present invention are described in detail below, however, the present invention may have other embodiments in addition to these detailed descriptions.
Embodiment 1
A cooking appliance according to a preferred embodiment of the present invention will be described below. It is understood that the cooking appliance according to the present invention may be an electric rice cooker (e.g., an IH electric rice cooker), an electric pressure cooker, an electric stewpot, or other electric heating appliance. And the cooking appliance according to the present invention may have various functions of cooking porridge, etc., in addition to the function of cooking rice.
The cooking utensil mainly comprises a cooker body and a cover body. The pot body is basically in a round-corner cuboid shape and is provided with a cylindrical inner pot containing part, and the inner pot can be freely placed in or taken out from the inner pot containing part so as to conveniently clean the inner pot. The upper surface of the inner pot has a circular opening for holding materials to be heated, such as rice, soup, etc., in the inner pot. The cover body is basically in a round-corner cuboid shape and basically corresponds to the shape of the pot body. The cover body is pivotally connected to the cooker body in an openable and closable manner and is used for covering the cooker body. When the cover body is covered on the cooker body, a cooking space is formed between the cover body and the inner cooker.
As shown in fig. 3, the cooking appliance of the present embodiment includes a setting module, an indicating module, a heating module, a flow detecting and water adding module, a water level detecting module, a control module and an internet of things module. The device comprises a setting module, an indicating module, a heating module, a flow detection and water storage module, a water level detection module and an internet of things module, which are all electrically connected with a control module, so as to send electric signals to the control module or receive control electric signals of the control module.
The cooking appliance comprises a controller, and the control module is arranged in the controller.
The setting module is used for setting cooking parameters. Specifically, the user can set cooking parameters through the setting module. For example, the user selects the rice type to be cooked, selects the taste to be cooked, sets the timing time, sets the reservation time (time when cooking of the food material is completed), selects the cooking mode (soup cooking, rice cooking, etc.) and the like through the setting module. The user finishes the setting of the cooking parameters through the setting module, and the setting module conveys the cooking parameters set by the user to the control module in the form of electric signals.
The cooking utensil comprises a reminding device, and the indication module is arranged in the reminding device. The indication module comprises an indication lamp (LED lamp), a four-bit eight-section nixie tube and a sounder (buzzer or loudspeaker). The indication module is used for displaying cooking parameters set by a user, cooking time (duration of the current time from the cooking completion time of the food materials) of the cooking appliance in the cooking process and cooking state (heat preservation state, cooking state and cooking completion state of the food materials) of the cooking appliance. The indication module can also give out voice through the buzzer or the loudspeaker to prompt the user of the cooking state of the cooking utensil. The indication module may also sound a voice through a buzzer or a speaker to indicate to the user that the cooking appliance is in an abnormal state, such as blockage of the waterway 130. The control module sends a control electric signal to the indication module to control the operation of the indication module.
The heating module includes a heating device for heating an inner pot of the cooking appliance to cook food materials in the inner pot. The control module sends a control electric signal to the heating module to control the heating module to work.
As shown in fig. 4, the flow detection and water storage module includes a water pump 110, a water tank, a flow sensor 120, and a water channel 130 provided in the cooking appliance. The water course 130 communicates the cooking space of the cooking appliance with the inner receiving chamber of the water tank. Specifically, waterway 130 includes a waterway 131 and a waterway 132. The water outlet channel 131 communicates the cooking space with the water outlet of the water pump 110. The water inlet channel 132 communicates the internal receiving chamber of the water tank with the water inlet of the water pump 110. The waterway 130 may be a pipe provided in the cooking appliance. The water tank is used for storing cooking water. The water pump 110 serves to convey water in the water tank into a cooking space of the cooking appliance through the water course 130. The flow sensor 120 is electrically connected to a controller of the cooking appliance through a flow sensor circuit board 140. The flow sensor 120 may be an optoelectronic flow sensor. The flow sensor 120 is used to measure the flow of the water pump 110.
In this embodiment, the control module sends a control electrical signal to the water pump 110 to activate the water pump 110, and further cause the water pump 110 to deliver water in the water tank to the cooking space of the cooking appliance. The flow sensor 120 is used to detect the flow of the water pump 110. The flow sensor 120 sends flow data of the water pump 110 to the control module in the form of an electrical signal.
The water level detection module comprises a water level sensor arranged in the water tank. The water level detection module is used for detecting the water level in the water tank. The water level detection module transmits water level data in the water tank to the control module in the form of an electric signal.
In this embodiment, the user sets cooking parameters through the control module. The control module then controls the water pump 110 to start working according to the cooking parameters, and the water pump 110 delivers water in the water tank into the cooking space through the water channel 130.
The internet of things module is used for realizing network connection so as to synchronize the time of the cooking utensil with the current time.
In this embodiment, the cooking appliance further includes a timer. The timer is used for timing. The timer is connected with the control module to send the timing time to the control module.
The cooking appliance of the present embodiment is controlled by a failure detection method of the cooking appliance. As shown in fig. 1 and 2, the failure detection method of the cooking appliance includes:
step S1, before the water pump 110 works, a first water level in the water tank is obtained.
In this embodiment, as shown in fig. 2, step S21 is performed, and the user sets cooking parameters through the setting module, so as to perform step S22.
Step S22, the control module obtains a first water level in the water tank through a water level sensor arranged in the water tank, and step S23 is executed.
In step S23, the control module controls the water pump 110 to start working according to the cooking parameters, at this time, the water pump 110 delivers the water in the water tank to the cooking space through the water channel 130, and at this time, the timer starts to count time.
In this embodiment, the control module obtains the first water level in the water tank through a water level sensor provided in the water tank before the water pump 110 is operated.
Step S2, after the water pump 110 starts to work for a preset period of time, a second water level of the water tank is obtained.
As shown in fig. 2, in step S23, the control module controls the water pump 110 to start working according to the cooking parameters, at this time, the water pump 110 delivers the water in the water tank to the cooking space through the water channel 130, at this time, the timer starts to count time, and step S24 is executed.
Step S24, the water level sensor detects the second water level in the water tank in real time, and step S25 is executed.
Step S25, the control module judges whether the timing duration of the timer is longer than the preset duration, if so, the step S26 is executed; otherwise, returning to the execution step S25;
step S26, judging whether the difference value between the first water level and the second water level is larger than a preset value.
Thus, the second water level is the water level of the water tank after the water pump 110 is operated for a preset period of time after the first water level is obtained. According to the first water level and the second water level, whether the water pump can normally convey water in the water tank to the cooking space in the working process of the water pump 110 can be judged.
In other embodiments, step S1 may also be performed when the water pump 110 starts to operate or during operation of the water pump 110 to obtain the first water level. Correspondingly, step S2 may acquire the second water level after acquiring the first water level.
And S3, judging whether the difference value between the first water level and the second water level is larger than a preset value, if so, judging that the water channel 130 between the water tank and the cooking space of the cooking utensil is normal, and if not, judging that the water channel 130 is blocked.
The water tank has a communication port, and the water channel 130 communicates with the internal accommodating chamber of the water tank through the communication port of the water tank. In the case that the water tank and the water course 130 are not leaked, if the water course 130 is not blocked, the water level in the water tank is continuously lowered during the operation of the water pump 110, and the difference between the first water level and the second water level is continuously increased. If the water channel 130 is blocked, and the water channel 130 is blocked at the water outlet of the water tank, the water level in the water tank does not drop during the operation of the water pump 110, and the difference between the first water level and the second water level is equal to zero. If the water channel 130 is blocked, and the water channel 130 is blocked at a position of the water channel 130 away from the water outlet of the water tank, water in the water tank may enter a space between the blocked position of the water channel 130 and the water outlet of the water tank during operation of the water pump 110. At this time, the water level in the water tank drops, and the difference between the first water level and the second water level is equal to the depth of the volume of water in the water tank equal to the volume of the space between the blocked position of the water course 130 and the water outlet of the water tank. For example, the volume of the space between the blocked position of the waterway 130 and the water outlet of the water tank is 1L. During operation of the water pump 110, there will be 1L of water in the tank entering the space between the blocked location of the waterway 130 and the outlet of the tank, at which point the difference between the first water level and the second water level is equal to 1L of water in depth in the tank.
In this embodiment, after the first water level and the second water level are obtained, the control module determines whether the difference between the first water level and the second water level is greater than a preset value. The preset value may be determined according to the volume of the waterway 130 (the volume of water that the waterway 130 can accommodate). The preset value may be a natural number greater than zero, for example a natural number 1. If the difference between the first water level and the second water level is greater than the preset value, it is indicated that the water pump 110 can normally convey the water in the water tank to the cooking space through the water channel 130 during the operation of the water pump 110. At this time, the water channel 130 is not blocked, and the water channel 130 is normal. If the difference between the first water level and the second water level is less than or equal to the preset value, it indicates that the water pump 110 cannot normally convey the water in the water tank to the cooking space through the water channel 130, and the water channel 130 is blocked.
For example, the volume of the waterway 130 is 5L. The preset value is 5, and at this time, the volume of water in the water tank increases by 1L every 1mm of increase in the water level in the water tank. If the difference between the first water level and the second water level is greater than 5, it indicates that the water pump 110 can normally deliver the water in the water tank to the cooking space through the water channel 130. If the difference between the first water level and the second water level is 0, it indicates that the water channel 130 is blocked at the communication port of the water tank. If the difference between the first water level and the second water level is greater than 0 and less than 5, it indicates that the water channel 130 is blocked at a position different from the communication port.
In the working process of the water pump, the embodiment judges whether the difference value between the first water level and the second water level is larger than the preset value, and further determines whether the water channel of the cooking utensil is blocked, so that a user can be timely informed when the water channel is blocked, and further damage to the cooking utensil is avoided.
If it is determined that the water channel 130 is not blocked, when the water quantity Q2 in the cooking space is approximately equal to the water quantity Q1 required by the current cooking mode of the cooking appliance, the water pump 110 is stopped to avoid that excessive water is added into the cooking space to cause overflow of water in the cooking space or excessive water quantity of cooking affects the cooking taste.
In this embodiment, as shown in fig. 2, after the user sets the cooking parameters, before the control module controls the water pump 110 to start operating, that is, step S22 further includes the step of determining the cooking water amount Q1 required for cooking the food according to the cooking parameters by the control module. Correspondingly, during the operation of the water pump 110, i.e. step S24, the control module further determines the water quantity Q2 of the cooking space of the cooking appliance in real time. If it is determined in step S26 that the difference between the first water level and the second water level is greater than the preset value (the water course 130 is determined to be normal), it is indicated that the water pump 110 can normally deliver the water in the water tank to the cooking space. In this case, the water pump 110 may input excessive water into the cooking space, which may cause water in the cooking space to overflow or the amount of water to be cooked to be excessive, thereby affecting the taste of the cooking. In the present embodiment, step S29 is performed to determine whether Q2 is equal to or greater than Q1. If so, it is indicated that the water quantity Q2 in the cooking space is suitable for the type and the amount of food in the current cooking space in the current cooking mode, and step S30 is executed at this time, and the control module controls the water pump 110 to stop working. Otherwise, whether Q2 is greater than or equal to Q1 is continuously judged.
In other embodiments, the water amount Q2 of the cooking space of the cooking appliance may be determined after step S26, and then step S29 may be performed.
Preferably, as shown in fig. 2, the step of determining the amount of water in the cooking space of step S24 includes:
During the operation of the water pump 110, the control module acquires the real-time flow of the water pump 110 in real time through the flow sensor; the amount of water in the current cooking space is determined according to the real-time flow rate of the water pump 110 and the operating time of the water pump 110. The duration of operation of the water pump 110 may be determined by the duration of the timer. Therefore, the method for determining the water quantity in the current cooking space according to the real-time flow of the water pump 110 and the working time of the water pump 110 is simple, and meanwhile, the cooking appliance does not need to be provided with a device for determining the water quantity in the cooking space, and is simple in structure.
In the failure detection method of the cooking appliance according to the present embodiment, in step S26, if it is determined that the water channel 130 is normal, the control module controls the heat generating device to start to operate so as to heat the food in the cooking space. Then, when the cooking is completed, the control module controls the indication module to inform the user of the current state of the cooking appliance (cooking completion). As in step S31 and step S32 in fig. 2.
Preferably, as shown in fig. 2, the step of determining the cooking water amount Q1 required for cooking the food material by the control module of step S22 according to the cooking parameters may include: the control module determines a required cooking water quantity Q1 according to a cooking mode set by a user and the type and quantity of food materials in the cooking space. Therefore, the cooking water amount is not required to be set by a user, and the operation is simple.
In this embodiment, as shown in fig. 2, in step S26, if the difference between the first water level and the second water level is less than or equal to the preset value, step S27 is performed.
Step S27, determining that the water channel 130 is clogged, and at this time, executing step S28.
In step S28, the control module controls the indication module to send out a reminding message to prompt the user that the water channel 130 is blocked. At this time, the user can turn off the power of the cooking appliance, thereby preventing the cooking appliance from malfunctioning, such as the water pump 110 from burning out.
Embodiment 2
Embodiment 2 differs from embodiment 1 in that in embodiment 2, the water tank may not be provided with a water level sensor, and the flow rate detection and water addition module may not be provided with a flow rate sensor 120. In embodiment 2, a current sensor is provided in the water pump 110. Thus, when the control module controls the water pump 110 to start working, the control module acquires the working current of the water pump 110 in real time through the current sensor, and then the control module judges whether the working current is larger than a preset current value. If so, it is indicated that the load of the water pump 110 is large, the water pump 110 cannot normally convey water into the cooking space through the water channel 130, and at this time, the water channel 130 is blocked. If not, the load of the water pump 110 is small, the water pump 110 can normally convey water into the cooking space through the water channel 130, and at the moment, the water channel 130 is not blocked, and the water channel 130 is normal.
Embodiment 2 determines whether the working current of the water pump 110 is greater than a preset current value during the working process of the water pump 110, and further determines whether the water channel is blocked, so that the user can be informed in time when the water channel is blocked, and further damage to the cooking utensil is avoided.
Preferably, the preset current value may be a rated current of the water pump 110.
Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular implementations only and is not intended to be limiting of the invention. Terms such as "component" as used herein may refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like as used herein may refer to one component being directly attached to another component or to one component being attached to another component through an intermediary. Features described herein in one embodiment may be applied to another embodiment alone or in combination with other features unless the features are not applicable or otherwise indicated in the other embodiment.
The present invention has been described in terms of the above embodiments, but it should be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the embodiments described. Those skilled in the art will appreciate that many variations and modifications are possible in light of the teachings of the invention, which variations and modifications are within the scope of the invention as claimed.

Claims (7)

1. A method of detecting a malfunction of a cooking appliance, the method comprising:
Acquiring a first water level in a water tank during or before the water pump works;
after the first water level in the water tank is obtained, after the water pump starts to work for a preset time, obtaining a second water level of the water tank;
judging whether the difference value between the first water level and the second water level is larger than a preset value, if so, judging that a water channel between the water tank and a cooking space of the cooking utensil is normal, and if not, judging that the water channel is blocked;
wherein the preset value is determined according to the volume of the water channel,
The method further comprises the steps of:
Before the water pump is started to work, determining the cooking water quantity required by the cooking utensil to cook food materials;
if the water channel is judged to be normal, judging whether the current water quantity in the cooking space is larger than or equal to the cooking water quantity, and if so, stopping the water pump;
the step of judging whether the water quantity in the current cooking space is larger than or equal to the cooking water quantity comprises the following steps:
acquiring the real-time flow of the water pump in the working process of the water pump;
Determining the current water quantity in the cooking space according to the real-time flow of the water pump and the working time of the water pump;
judging whether the current water quantity in the cooking space is larger than or equal to the cooking water quantity.
2. The method of claim 1, wherein the preset value is a natural number greater than zero.
3. The malfunction detection method of a cooking appliance according to claim 1, wherein the cooking water amount is determined according to a cooking mode and a kind and an amount of food material in the cooking space.
4. A failure detection method of a cooking appliance according to any one of claims 1 to 3, further comprising,
If the water channel is judged to be blocked, sending out reminding information;
And if the water channel is judged to be normal, the heating device in the cooking appliance starts to work so as to heat the food in the cooking space.
5. A cooking appliance comprising a water pump, a water tank, and a controller, the cooking appliance being provided with a water course communicating an internal accommodating chamber of the water tank and a cooking space of the cooking appliance, the controller being connected to the water pump to control the water pump to deliver water in the water tank to the cooking space, the controller controlling the cooking appliance using the failure detection method of the cooking appliance according to any one of claims 1 to 4.
6. The cooking appliance of claim 5, further comprising a reminder device configured to issue a reminder message when the waterway is blocked.
7. The cooking appliance of claim 5, wherein the cooking appliance is an electric rice cooker, an electric pressure cooker, or an electric stewpan.
CN201811622443.9A 2018-12-28 2018-12-28 Fault detection method of cooking utensil and cooking utensil Active CN111380709B (en)

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