CN209966150U - Flow rate detection unit and cooking utensil - Google Patents

Abstract

The utility model provides a flow detection unit and cooking utensil, this flow detection unit includes: an impeller assembly comprising a plurality of impeller blades, the impeller blades being driven in rotation by the flow of water; the rotating speed sensing circuit comprises a sensor arranged on the motion track of the impeller blade, and the rotating speed sensing circuit generates a detection signal when the impeller blade passes through the sensor; and the control module is connected with the rotating speed sensing circuit and used for determining the rotating speed of the impeller assembly according to the detection signal and determining the flow passing through the impeller assembly according to the rotating speed of the impeller assembly. According to the utility model discloses a flow detection unit and cooking utensil utilize the photoelectric type principle to detect the flow, are difficult for receiving the interference, can be more accurate measure the water yield that adds in toward cooking utensil how much to accurate control culinary art effect.

Description

Flow rate detection unit and cooking utensil

Technical Field

The utility model relates to the technical field of household appliances, more specifically, the utility model relates to a flow detection unit and cooking utensil.

Background

With the improvement of living standards, cooking appliances such as electric cookers are increasingly used, and the degree of automation and intelligence of the cooking appliances is also increasing. An automatic cooking utensil has appeared on the existing market, and automatic cooking utensil is provided with the water tank device, has water piping connection between automatic cooking utensil's culinary art cavity (the pot in promptly) and the water tank, and control module adds water in the culinary art cavity of water tank to cooking utensil through the control water pump, realizes adding water automatically, no longer needs the consumer to add water in toward the culinary art cavity to cooking utensil's degree of automation has been improved.

However, such automatic cooking appliances usually have no flow rate detection device, or some automatic cooking appliances have a flow rate detection device and use an electromagnetic flow meter, and this solution is made by applying the principle that an electromotive force induced by an electric conductor in a magnetic field is proportional to the magnitude of the flow rate and the magnitude of the flow rate is reflected by detecting the magnitude of the electromotive force, and the signal is easily interfered by an external magnetic field, which leads to inaccurate flow rate detection by doctors.

Therefore, there is a need for a flow rate detecting unit and a cooking appliance, which at least partially solve the problems in the prior art.

SUMMERY OF THE UTILITY MODEL

To the problem, the utility model provides a flow detection unit and cooking utensil, it utilizes the photoelectric principle to detect the flow, is difficult for receiving the interference, can be more accurate measure the water yield that adds in toward cooking utensil how much to accurate control culinary art effect.

The utility model discloses a first aspect provides a flow detection unit, include:

an impeller assembly comprising a plurality of impeller blades, the impeller blades being driven in rotation by the flow of water;

the rotating speed sensing circuit comprises a sensor arranged on the motion track of the impeller blade, and the rotating speed sensing circuit generates a detection signal when the impeller blade passes through the sensor;

and the control module is connected with the rotating speed sensing circuit and used for determining the rotating speed of the impeller assembly according to the detection signal and determining the flow passing through the impeller assembly according to the rotating speed of the impeller assembly.

In an embodiment of the invention, the impeller assembly comprises at least two circumferentially arranged impeller blades.

In an embodiment of the present invention, the impeller assembly includes three impeller blades uniformly arranged along a circumference.

In an embodiment of the present invention, the present invention further includes:

the impeller assembly and the sensor are arranged in the flow detection cavity.

In an embodiment of the present invention, the sensor includes an infrared transmitting tube and an infrared receiving tube which are arranged relatively, the impeller blade rotates to the position of the sensor, and the impeller blade passes through the infrared transmitting tube and the infrared receiving tube.

In an embodiment of the present invention, the detection signal includes a level signal of a C pole of the infrared receiving tube.

In an embodiment of the present invention, the level signal includes a high level signal, a low level signal, a rising edge signal, and a falling edge signal.

The utility model discloses an in the embodiment, control module basis level signal's number is confirmed the number of turns of impeller subassembly, and then confirms the rotational speed of impeller subassembly and flow through the flow of impeller subassembly.

A second aspect of the present invention provides a cooking device, comprising:

a cooking cavity;

the water adding module comprises a water pump and a water path communicated with a water source and the cooking cavity, and the water pump is used for conveying water from the water source to the cooking cavity; and

according to the utility model discloses the first aspect flow detection unit, flow detection unit sets up on water pump or the water route.

In an embodiment of the present invention, the control module is configured to detect the detection signal once every set time interval, and calculate the number of the detection signal within the set time length range.

The utility model discloses an in the embodiment, control module configures to be in set for long time within range make anhydrous count add 1 when detecting signal's quantity is less than set for quantity set for long time within range the quantity of detecting signal is more than or equal to when setting for quantity according to detecting signal's quantity is confirmed set for the flow of long time within range water to make anhydrous count zero clearing.

In an embodiment of the present invention, the control module is configured to accumulate a plurality of the flow rates within the set time length range to obtain a total water flow rate.

The utility model discloses an in the embodiment, control module configures to and is in detect when anhydrous count is greater than the settlement number of times whether the water pump is opened, and is confirming when the water pump is opened water route trouble or anhydrous.

In an embodiment of the present invention, the present invention further includes:

an indication module for indicating the information,

the control module is configured to control the indication module to indicate when the water circuit is determined to be faulty or no water is available.

In an embodiment of the present invention, the present invention further includes:

the water storage module is used for storing cooking water;

the water path is communicated with the water storage module and the cooking cavity.

According to the utility model discloses a flow detection unit and cooking utensil, it utilizes the photoelectric principle not easily to be disturbed, can be more accurate measure the water yield that adds in toward cooking utensil how much to accurate control culinary art effect.

Further, according to the utility model discloses a flow detection unit and cooking utensil can also judge whether current water route is anhydrous according to detected signal's quantity to confirm whether the water route is trouble or anhydrous according to anhydrous number of times, thereby remind the user when water route trouble or anhydrous.

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 and devices of the invention. In the drawings, there is shown in the drawings,

fig. 1 is a schematic structural view of a cooking appliance according to an embodiment of the present invention;

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

fig. 3 is a schematic structural diagram of a flow detection unit according to an embodiment of the present invention;

fig. 4 is a schematic circuit diagram of a flow detection unit according to an embodiment of the present invention;

fig. 5 is a schematic diagram of a detection signal of a flow detection unit according to an embodiment of the present invention;

fig. 6 is a schematic flow chart of a detection process of a flow detection unit according to an embodiment of the present invention; and

fig. 7 is a schematic flowchart of a control method of a cooking appliance according to an 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 the present 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 the present invention.

In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of the present invention. It is apparent that the practice of the invention is not limited to the specific details known to those skilled in the art. The following detailed description of the preferred embodiments of the invention, however, is not intended to limit the invention to the particular embodiments disclosed, but on the contrary, the intention is to cover all modifications, equivalents, and alternatives falling within the spirit and scope of the invention as defined by the appended claims.

The utility model provides a cooking utensil. The cooking appliance may be an electric rice cooker, an electric pressure cooker or other electric heating appliance. In addition, the cooking appliance may have other functions such as cooking porridge and cooking soup in addition to the function of cooking rice.

Fig. 1 is a schematic structural view of a cooking appliance according to an embodiment of the present invention.

As shown in fig. 1, the cooking appliance 100 includes a pot body 110. The pot body 110 may have a generally rounded rectangular parallelepiped shape, a generally cylindrical shape, or any other suitable shape. The pot body 110 has a cooking cavity 120 formed therein. As an example, the cooking cavity 120 may be formed of an inner pot (not shown) provided inside the pot body 110 and a cover (not shown) provided on the pot body 110. Illustratively, the inner pot is generally cylindrical in shape or any other suitable shape. The inner pot can be freely put into or taken out of the inner pot receiving part of the pot body 110 to facilitate the cleaning of the inner pot. The inner pot is used for storing food to be cooked, such as rice, soup, etc. The top of the inner pot is provided with a top opening. The user can store food to be cooked in the inner pot through the top opening or take cooked food out of the inner pot through the top opening. Illustratively, the shape of the cover substantially corresponds to the shape of the pot body 110. For example, the cover may have a rounded rectangular parallelepiped shape. The lid body is provided on the pot body 110 in an openable and closable manner, and is used to cover the entire top of the pot body or at least the inner pot of the pot body 110. Specifically, in the present embodiment, the lid body may be pivotably provided above the pot body 110 between the maximum open position and the closed position by, for example, a hinge. When the cover body is covered on the pot body, the cooking cavity is formed between the cover body and the pot body 110 (specifically, the inner pot of the pot body 110). Furthermore, the cover body is also provided with an exhaust port communicated with the cooking space, and redundant steam in the cooking space can be exhausted through the exhaust port, so that the pressure in the cooking cavity is maintained in a required range.

The pot body 110 is further provided therein with a heating means for heating the cooking cavity/inner pot. The heating means may heat the cooking cavity/inner pot at the bottom and/or side of the cooking cavity/inner pot. The heating device may be an electrically heated tube or may be an induction heating device such as a solenoid coil. The cooker body 110 is further provided with a temperature measuring device for measuring the temperature of the cooking cavity/inner pot. The temperature measuring device can be various temperature sensors, and can measure the temperature of the cooking cavity/inner pot, so that the temperature can be conveniently controlled according to the temperature heating device of the cooking cavity/inner pot. Exemplarily, in this embodiment, the temperature measuring device is arranged at the bottom of the cooking cavity/inner pot. However, it should be understood that in other embodiments the temperature measuring device may be arranged at other locations, for example at the side of the cooking cavity/inner pot, or at both the bottom and the side of the cooking cavity/inner pot.

Referring again to fig. 1, the cooking appliance 100 further includes a water tank 130 disposed on the pot body 110, and the water tank 130 has a generally cylindrical shape or any other suitable shape. The water tank 130 is for storing cooking water, and the water tank 130 may be provided at the rear end of the pot body 110 or any other suitable position. The water tank 130 is mounted and secured in place using suitable electromechanical structures. The water tank 130 communicates with the cooking chamber through a water inlet line 140. The water inlet line 140 has a water inlet in communication with the water tank 130 and a water outlet in communication with the cooking chamber 120. The water inlet pipe 140 may be provided in the pot body 110 or in the lid, or a portion thereof is located in the pot body 110 and a portion thereof is located in the lid. As an example, the water inlet is provided in the pot body 110, and the water outlet is provided in the lid or the pot body.

Further, a water pump is further arranged in the cooker body 110, water can be automatically added into the cooking cavity 120 of the cooking appliance 100 from the water tank 130 by controlling the water pump, a consumer is not required to add water into the cooking cavity, and the automation degree of the cooking appliance is improved.

Fig. 2 is a schematic block diagram of a cooking appliance according to an embodiment of the present invention. As shown in fig. 2, the cooking appliance 100 includes a food material storage module 10, a water storage module 11, a heating module 12, a water adding module 13, a setting module 14, an indication module 15, and a control module 16.

The food material storage module 10 is used for storing food materials with identification codes. The identification code carries food material information, and the food material information comprises information of food material types, such as rice types, food material production date T0, shelf life duration T1 and the like. The identification code may be a two-dimensional code, a bar code, or the like. Exemplarily, in the present embodiment, the identification code is a barcode. The food storage module 10 may have various structures, for example, the food storage module 10 includes a plurality of food storage bins, the food is stored in the food storage bins, the identification codes are attached to the food storage bins, and the information of the food stored in the food storage bins can be obtained by scanning and analyzing the information of the identification codes. Also, for example, the ingredients stored therein may be entered into the cooking cavity (inner pot) of the cooking appliance 100 by puncturing a seal at the bottom of the ingredient storage bin. The food storage module 10 may be disposed at any suitable position of the cooking appliance 100, and in the present embodiment, the food storage module 10 is disposed in a cover of the cooking appliance 100.

In addition, in this embodiment, a food material adding module (not shown) may be further included to add the food material in the food material storage module to the cooking cavity. Exemplarily, the food material adding module comprises a food material conveying channel communicated with the cooking cavity and a motor, wherein the motor is used for controlling the opening and closing of the food material conveying channel, when a sealing element at the bottom of the food material storage bin is punctured by the puncturing device, the food material in the food material storage bin falls into the food material conveying channel, and then the motor opens the conveying channel to convey the food material into the cooking cavity, so that the automatic adding of the food material is realized.

The water storage module 11 is used for storing water for cooking. Illustratively, the water storage module 11 is, for example, a water tank 130 provided on the pot body 110, which may be provided at a rear end or a side end of the pot body 110 or other suitable position.

The heating module 12 is used for heating food material in the cooking space of the cooking appliance 100. The heating module 12 may be provided in the pot body, which may heat the inner pot at the bottom and/or sides thereof. The heating module 12 may be an electric heating tube or an induction heating device such as a solenoid coil. In the structure in which the cooking appliance 100 includes a detachable base, the heating module 12 may also be provided in the base of the cooking appliance 100.

The water adding module 13 is used for adding water into the cooking cavity of the cooking appliance 100. The water adding module 13 includes a water pump and a water path communicated with the cooking cavity 120. The water pump is used for conveying the water in the water storage module 11 into the cooking cavity 120 through the waterway. The waterway includes a water outlet communicated with the cooking cavity 120, a water inlet communicated with the water storage module 11, and a pipeline connecting the water inlet and the water outlet. The water adding module 13 may further include a water storage module 11 disposed on the cooking appliance 100, and a valve and flow rate detecting unit 20 (see fig. 3) disposed on the water storage module 11 or the pipe connecting the water inlet and the water outlet. The water adding module 13 adds a predetermined amount of water into the cooking cavity 120 under the control of the control module 16, and a better cooking effect can be achieved by precisely controlling the amount of water added. The water adding module 13 may be disposed on the cover or the pot body of the cooker 100, or a part of the structure may be disposed on the cover and a part of the structure may be disposed on the pot body.

In this embodiment, the flow rate detecting unit 20 adopts a photoelectric detection principle, and is not easily interfered by signals, so that the flow rate can be accurately detected. The detection principle of the flow rate detection unit 20 will be described in detail below.

Furthermore, it should be understood that the cooking appliance 100 according to the present invention may not include the water storage module 11, and the water adding module 13 may directly add water from a water source, such as a water pipe, into the cooking cavity 120.

The setting module 14 is used for providing various cooking settings for the user, such as setting rice type, taste, timing time, appointment time, cooking mode, and the like. The setup module 14 may be various keys, a touch pad, or a touch screen. The setting module 14 may be disposed on a lid, a pot, or a base of the cooking appliance 100.

The indication module 15 is used for indicating cooking information or other related information or status, such as total cooking time, remaining time to the user. The indication module 15 may include an LED lamp, a four-position eight-segment nixie tube, a buzzer/speaker or other devices, and is used to display the cooking time and status set by the user or during the cooking process, and to sound or voice prompt the cooking status of the user through the buzzer. The indication module 15 may be disposed on the lid, the pot body, or the base of the cooking appliance 100.

The control module 16 is used to control the above modules and other modules of the cooking appliance 100, so as to control various functions of the cooking appliance 100 and various cooking modes or programs. The control module 16 may be implemented as various controllers, which may be various types of controllers, such as an MCU or the like.

In this embodiment, the control module 16 is configured to determine whether the water path of the water adding module 13 is faulty or has no water according to the detection signal of the flow detecting unit 20, so as to remind the user of the fault or no water in the water path of the water adding module 13.

Fig. 3 is a schematic structural diagram of a flow detection unit according to an embodiment of the present invention; fig. 4 is a schematic circuit diagram of a flow detection unit according to an embodiment of the present invention; fig. 5 is a schematic diagram of a detection signal of a flow rate detection unit according to an embodiment of the present invention.

The structure and principle of the flow rate detecting unit according to the embodiment of the present invention will be described with reference to fig. 3 to 5.

As shown in fig. 3, the flow detecting unit 20 includes a flow detecting cavity 21, an impeller assembly 22, a water inlet pipe 24, a water outlet pipe 25, and a rotation speed sensing circuit. The cross section of the flow detection cavity 21 is circular, the impeller assembly 22 is arranged in the flow detection cavity 21, when water flows into the flow detection cavity 21 from the water inlet pipeline 24 and flows out from the water outlet pipeline 25, the impeller assembly 22 can rotate in the flow detection cavity 21 under the driving of the water flows, and the flow flowing through the flow detection cavity 21 can be obtained by detecting the rotating speed of the impeller assembly 22.

The impeller assembly 22 has at least two circumferentially arranged impeller blades 23. Illustratively, in the present embodiment, the impeller assembly 22 includes three impeller blades 23 uniformly arranged along the circumference.

The rotating speed sensing circuit comprises a sensor 26 arranged on the motion track of the impeller blade 23, the rotating speed sensing circuit generates a detection signal when the impeller blade 23 passes through the sensor 26, and the control module 16 is connected with the rotating speed sensing circuit and is used for determining the rotating speed of the impeller assembly 22 according to the detection signal and determining the flow rate flowing through the impeller assembly 22 according to the rotating speed of the impeller assembly 22.

In this embodiment, the rotation speed sensing circuit and the sensor 26 are disposed on a circuit board 27, and the circuit board 27 is mounted on a side wall of the flow detection chamber 21.

In this embodiment, the sensor 26 includes an infrared transmitting tube 26A and an infrared receiving tube 26B, the infrared transmitting tube 26A and the infrared receiving tube 26B are respectively disposed on two opposite surfaces of the U-shaped groove, the sensor 26 is mounted on a circuit board 27, and the circuit board 27 has a peripheral circuit and an interface of the sensor 26, which together constitute the rotation speed sensing circuit.

As shown in fig. 4, the rotation speed sensing circuit includes an infrared transmitting tube 26A and an infrared receiving tube 26B, the infrared transmitting tube 26A and a resistor R1 are connected in series between a power VCC and a ground, the infrared receiving tube 26B and a resistor R2 are connected in series between the power VCC and the ground, when the infrared transmitting tube 26A is powered on, it can emit infrared light to the infrared receiving tube 26B, when the infrared receiving tube 26B receives the infrared light emitted by the infrared transmitting tube 26A, it is in a conducting state, and the C pole of the infrared receiving tube 26B is at a low level; on the other hand, if the optical path between the infrared transmitting tube 26A and the infrared receiving tube 26B is blocked, the infrared receiving tube 26B cannot receive the infrared light transmitted from the infrared transmitting tube 26A, and is in the off state, and the level C of the infrared receiving tube 26B is high.

The working principle of the flow rate detection unit 20 of the present embodiment is as follows: the water flow impact drives the impeller blades 23 in the flow detection cavity 21 to rotate, the rotating speed of the impeller blades 23 is in a linear relation with the liquid flow flowing through the flow detection cavity 21, therefore, the flow value can be known correspondingly by detecting the rotating speed of the impeller blades 23, the rotating speed of the impeller blades 23 is realized through the sensor 26 and the counter in the control module 16 together, the flow value is indirectly measured, and the proportion of the water amount of the food material is adjusted by accurately measuring the liquid flow added into the cooking appliance, so that the refined cooking is realized.

The principle of detecting the rotation speed of the impeller blade 23 is that when the impeller blade 23 enters the U-shaped groove of the sensor 26, the infrared ray emitted from the infrared emission tube 26A of the sensor 26 is blocked by the impeller blade 23, so that the infrared reception tube 26B cannot receive the infrared ray emitted from the infrared emission tube 26A, and thus the infrared reception tube 26B is in a cut-off state, and the C-pole level of the infrared reception tube 26B is at a high level. When the impeller blades 23 leave the U-shaped groove of the sensor 26, the infrared rays emitted from the infrared emission tube 26A of the sensor 26 are received by the infrared reception tube 26B, so that the infrared reception tube 26B is brought into a conduction state, and the C-pole level of the infrared reception tube 26B is brought to a low level. The control module 16 is connected with a rotating speed sensing circuit, and a C pole signal of an infrared receiving tube 26B in the sensor 26 is transmitted to the control module 16 through an interface of a circuit board 27. Fig. 5 shows a C-pole signal of the infrared receiving tube 26B, when the control module 16 detects that 1 level rising edge or falling edge, i.e. 1 pulse, occurs at each C-pole of the infrared receiving tube 26B, the control module counts 1 time, and when the count is determined to be equal to 3, the control module 16 determines 1 rotation of the impeller blade 23, and determines the number of rotations of the impeller blade 23 according to the number of pulses, so as to obtain the rotation speed of the impeller blade 23 according to the number of rotations of the impeller blade 23, and further determine the liquid flow rate flowing through the flow rate detection cavity 21 according to the rotation speed of the impeller blade 23.

It should be understood that although the detection signal is a high level signal of the C pole of the infrared receiving tube 26B in the present embodiment, the detection signal may be a low level signal, a rising edge signal, a falling edge signal, or other suitable signals in other embodiments.

The flow rate detecting unit 20 provided in the present embodiment may be disposed at any suitable position on the water adding module 13 of the cooking appliance 100, such as on a pipeline, and further such as in a water pump.

The flow rate detecting unit 20 according to the present embodiment adopts the photoelectric detection principle, so that it is not easily affected by signal interference, and the flow rate detection is more accurate.

As described above, in the present embodiment, the control module 16 is configured to determine whether the water path of the water adding module 13 is faulty or has no water according to the detection signal of the flow detecting unit 20, so as to remind the user of the fault or no water in the water path of the water adding module 13. Specifically, the control module 16 is configured to detect the detection signal once every a set time interval, for example, 125-.

Further, the control module 16 is configured to accumulate a plurality of the flows for the set duration range to obtain a total flow rate, and is configured to detect whether the water pump is on when the no water count is greater than a set number of times, such as 5 times, and to determine that the water circuit is faulty or no water when the water pump is determined to be on.

The following describes a detection method of the flow rate detection unit according to the present invention with reference to fig. 6.

Fig. 6 is a schematic flow chart of a detection process of the flow rate detection unit according to an embodiment of the present invention.

As shown in fig. 6, the detection method of the flow detecting unit according to the present invention includes:

step S101, system flow detection preparation. Such as powering up the speed sensing circuit.

And step S102, judging whether the water pump is started or not.

Whether the water pump is started or not is judged by detecting a signal of the water pump.

Step S103, detecting the detection signal once every a set time interval, for example, 125-. The detection signals are, for example, a high level signal, a low level signal, a rising edge signal, and a falling edge signal.

And step S104, calculating the number of the detection signals in a set duration range. The set duration range is, for example, 200-.

Step S105, judging that the number of the detection signals in the set duration range is smaller than the set number. The set number is, for example, 5.

And if the number of the detection signals in the set duration range is less than the set number, the step S108 is executed, otherwise, the step S106 is executed.

And S106, determining the flow Q1 of the water in the set time length range according to the number of the detection signals, and clearing the waterless count n.

The flow rate of the water in the set duration range can be obtained by inquiring a corresponding relation table of the flow rate and the number of the detection signals.

In step S107, the flow rates Q1 in a plurality of the set time length ranges are added to obtain a total flow rate Q.

Step S108, if the number of the detection signals in the set time length range is less than the set number, for example, 5, the waterless count n is increased by 1.

Step S109, determines whether the anhydrous count n is greater than the set number of times. The set number of times is, for example, 5 times.

If the number of times of the water-absence-cutoff count n is smaller than the set number of times, the process returns to step S105. Otherwise, if the waterless count n is greater than the set number of times, the process proceeds to step S110.

And step S110, judging whether the water pump is started at the moment. And judging whether the water pump is started or not by detecting the signal of the water pump at the moment.

If the water pump is not turned on at this time, the process returns to step S102, whereas if the water pump is turned on at this time, the process proceeds to step S111.

And step S111, judging whether the water channel is in fault or is not water, and presenting. That is, if the water-free count n is greater than the set number of times and the water pump is turned on, it is determined that there is a fault in the waterway or there is no water in the water storage module 11, for example, the waterway is blocked, the water in the water storage module 11 is frozen, or there is no water in the water storage module 11.

In step S112, when the water path is judged to be failed or no water is present, the flow rate detection is stopped.

According to the flow detection unit of the embodiment, the detection process is that the rising edge or the falling edge, namely the number of pulses, output by the rotating speed sensing circuit is collected at regular time, the water flow with a certain time duration is calculated by using a table look-up, and whether the water path is in fault is judged by combining the opening or not of the water pump when the number of pulses in a certain time duration is detected to be smaller than a threshold (for example, 5).

Fig. 7 is a schematic flowchart of a control method of a cooking appliance according to an embodiment of the present invention.

The control method of the cooking appliance shown in fig. 7 includes:

step 201, a user sets the number of food materials. For example, setting the number of food materials selected from the food material storage module, or setting the number of food materials that the user adds to the cooking cavity.

Step S202, the control module calculates the corresponding water quantity Q according to the quantity of the food materials.

And step S203, the control module controls to turn on the water pump to add water into the cooking utensil, and simultaneously detects the water flow in real time.

The control module 16 controls the water adding module 13 to add water and controls the flow detecting unit 20 to detect the flow.

And step S204, stopping adding water when the water quantity is detected to be more than or equal to Q.

In step S205, the control module starts the heating module to perform cooking.

In step S206, the cooking end device informs the user through the indication module.

According to the cooking utensil of this embodiment, control module calculates the needs according to the culinary art volume that the user set up and adds how much water, and the control water pump adds water and passes through the water yield that flow detection unit 20 real-time detection has added simultaneously in to the cooking utensil, stops adding water when adding the water yield and equals the demand, begins to heat the culinary art to realize more accurate edible material water yield ratio, realize the culinary art that becomes more meticulous.

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 belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "part," "member," and the like, when used herein, can 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 as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

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 (14)

1. A flow sensing unit, comprising:

an impeller assembly comprising a plurality of impeller blades, the impeller blades being driven in rotation by the flow of water;

the rotating speed sensing circuit comprises a sensor arranged on the motion track of the impeller blade, and the rotating speed sensing circuit generates a detection signal when the impeller blade passes through the sensor;

and the control module is connected with the rotating speed sensing circuit and used for determining the rotating speed of the impeller assembly according to the detection signal and determining the flow passing through the impeller assembly according to the rotating speed of the impeller assembly.

2. The flow sensing unit of claim 1, wherein the impeller assembly comprises at least two circumferentially arranged impeller blades.

3. The flow sensing unit of claim 1, wherein the impeller assembly includes three impeller blades uniformly circumferentially arranged.

4. The flow rate detecting unit according to claim 1, characterized by further comprising:

the impeller assembly and the sensor are arranged in the flow detection cavity.

5. The flow sensing unit of claim 1, wherein the sensor comprises an infrared emitting tube and an infrared receiving tube disposed opposite to each other, and the impeller blade passes between the infrared emitting tube and the infrared receiving tube when rotated to a position where the sensor is located.

6. The flow rate detecting unit according to claim 5, wherein the detection signal includes a level signal of a C-pole of the infrared receiving tube.

7. The flow sensing unit of claim 6, wherein the control module determines the number of turns of the impeller assembly based on the number of the level signals, thereby determining the rotational speed of the impeller assembly and the flow rate through the impeller assembly.

8. A cooking appliance, comprising:

a cooking cavity;

the water adding module comprises a water pump and a water path communicated with a water source and the cooking cavity, and the water pump is used for conveying water from the water source to the cooking cavity; and

the flow sensing unit of any one of claims 1-7, disposed on the water pump or waterway.

9. The cooking appliance of claim 8, wherein the control module is configured to detect the detection signal once every set time interval and count the number of detection signals within a set time duration.

10. The cooking appliance according to claim 9, wherein the control module is configured to increase the no water count by 1 when the number of detection signals in the set time period range is less than a set number, determine the flow rate of water in the set time period range according to the number of detection signals when the number of detection signals in the set time period range is greater than or equal to the set number, and clear the no water count.

11. The cooking appliance of claim 10, wherein the control module is configured to accumulate a plurality of the set duration ranges of flow to obtain a total water flow.

12. The cooking appliance of claim 10, wherein the control module is configured to detect whether the water pump is on when the no water count is greater than a set number of times, and to determine that the water circuit is faulty or no water when the water pump is determined to be on.

13. The cooking appliance of claim 12, further comprising:

an indication module for indicating the information,

the control module is configured to control the indication module to indicate when the water circuit is determined to be faulty or no water is available.

14. The cooking appliance of claim 8, further comprising:

the water storage module is used for storing cooking water;

the water path is communicated with the water storage module and the cooking cavity.

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