CN113007748B

CN113007748B - Kitchen range

Info

Publication number: CN113007748B
Application number: CN201911323187.8A
Authority: CN
Inventors: 郑健; 王京华; 姚午厚; 王越; 贺立军; 王中妮
Original assignee: Qingdao Haier Intelligent Cooking Appliances Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Intelligent Cooking Appliances Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2024-06-04
Anticipated expiration: 2039-12-20
Also published as: CN113007748A

Abstract

The invention belongs to the technical field of household appliances, and particularly relates to a kitchen range. The invention aims to solve the problems that the existing kitchen range adopts a uniform dry-burning prevention temperature threshold value and the dry-burning prevention control precision is poor. The stove comprises an annular stove head, a detection circuit and two detection probes which are arranged at opposite intervals, wherein the two detection probes are positioned in the annular stove head; the top ends of the two detection probes are respectively used for being abutted with the pot, and the bottom ends of the two detection probes are respectively electrically connected with the detection circuit; the detection circuit, the two detection probes and the metal pot can form a detection loop through which a power supply signal passes; the detection circuit, the two detection probes and the nonmetal cookware can not form a detection loop through which a power supply signal passes; therefore, the pan material can be judged, and further, different dry-burning prevention thresholds are set, so that the dry-burning prevention fine control is realized, the problems that the air source is closed in advance and the dry-burning time is too long to cause food carbonization due to the fact that the dry-burning prevention temperature is not reached are avoided, and the user experience is improved.

Description

Kitchen range

Technical Field

The invention belongs to the technical field of household appliances, and particularly relates to a kitchen range.

Background

A gas cooker is a commonly used cooker in modern households that heats or cooks food by burning gas to produce an open flame. In some cases, a user may forget to turn off the gas cooker during cooking, and materials in the cooker are heated for a long time to dry out the liquid, so that dry burning occurs. For this reason, a temperature sensor is usually installed on the existing gas cooker to detect the temperature change of the materials inside the cooker. When the temperature value exceeds the preset dry burning prevention temperature, the dry burning is judged to occur, and at the moment, the gas switch is automatically cut off, and the gas stove stops working.

But the cookware on the market at present is various, such as an iron pot, an aluminum pot, a ceramic pot and the like. The existing cookware can be divided into a metal pot and a nonmetal pot according to different manufacturing materials, the heated condition and the dry burning condition of the metal pot and the nonmetal pot are greatly different, a stove adopts a uniform dry burning prevention temperature threshold, obviously causes great errors, and has the problems that an air source is closed in advance and the dry burning time is too long due to the fact that the dry burning prevention temperature threshold is not reached, so that the food carbonization is caused, and the user experience degree is poor.

Accordingly, there is a need in the art for a new cooktop that can determine the material of a cooktop to solve the above-mentioned problems.

Disclosure of Invention

In order to solve the problems in the prior art, namely to solve the problems that the prior kitchen range adopts a uniform dry-burning prevention temperature threshold value, the dry-burning prevention control precision is poor, and the gas source is closed in advance and the dry-burning time is too long to cause food carbonization due to the fact that the dry-burning prevention temperature threshold value is not reached, the invention provides the kitchen range. Wherein, the cooking utensils include: the hearth comprises an annular burner and a detection device; the detection device includes: the detection circuit, the first detection probe and the second detection probe are arranged at intervals, and the first detection probe and the second detection probe are both positioned in the annular furnace end; the first detection probe is connected with the second detection probe in an insulating way; the top end of the first detection probe is used for being abutted with the pot, and the bottom end of the first detection probe is electrically connected with the first end of the detection circuit; the top end of the second detection probe is used for being abutted with the pot, and the bottom end of the second detection probe is electrically connected with the second end of the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of metal materials can form a detection loop through which a power supply signal passes.

In the preferred technical scheme of the cooker, the first detection probe comprises a metal butt joint and an elastic piece positioned at the bottom of the metal butt joint, the top end of the metal butt joint is used for being in butt joint with the cooker, and the bottom end of the metal butt joint is connected with the elastic piece.

In the preferable technical scheme of the cooker, the first detection probe further comprises a sleeve, the sleeve comprises a sliding cylinder part and a closing-in part positioned at the top end of the sliding cylinder part, and projections of the closing-in part on the sliding cylinder part are all positioned in the sliding cylinder part; the metal abutting joint comprises a sliding part and an abutting part positioned at the top end of the sliding part, the sliding part is positioned in the sliding cylinder part, and the bottom end of the sliding part is abutted with the elastic piece; the abutting part extends out of the closing-in part and is used for abutting against the cooker.

In the preferable technical scheme of the cooker, the first detection probe further comprises a connecting column arranged at the bottom of the sleeve, and the connecting column is provided with a first wire passing channel communicated with the sleeve; the detection device further comprises a first wire; one end of the first wire is electrically connected with the bottom end of the metal butt joint, and the other end of the first wire penetrates through the first wire passing channel to be electrically connected with the first end of the detection circuit; or the elastic piece is a metal piece, one end of the first wire is electrically connected with the bottom end of the elastic piece, and the other end of the first wire penetrates through the first wire passing channel to be electrically connected with the first end of the detection circuit.

In the preferred technical scheme of the cooker, the second detection probe comprises a support column and a metal contact arranged on the top surface of the support column, wherein the top surface of the metal contact protrudes upwards to form an arc-shaped contact surface, and the arc-shaped contact surface is used for being abutted with the cooker; the detection device further comprises an insulating connecting piece, and the insulating connecting piece is respectively connected with the first detection probe and the support column.

In the preferable technical scheme of the cooker, the support column is a metal column, and the metal column is arranged in the annular furnace end; the detection circuit is arranged at the bottom of the cooking bench; the bottom of the annular furnace end is provided with a wire passing hole, and the second end of the detection circuit passes through the wire passing hole and is electrically connected with the metal column.

In the preferable technical scheme of the cooker, the support column is provided with a second wire passing channel; the detection device further comprises a second wire, one end of the second wire is electrically connected with the metal contact, and the other end of the second wire penetrates through the second wire passing channel to be connected with the second end of the detection circuit.

In the preferable technical scheme of the cooker, a temperature detector is arranged in the second wire passing channel, and the temperature detector comprises a temperature sensing element; the temperature sensing element is the metal contact; or an opening is formed in the metal contact, the temperature sensing element is installed in the opening, and an insulating ring is arranged between the temperature sensing element and the opening.

In the preferable technical scheme of the cooker, the cooker further comprises a control circuit board; the detection circuit is independently arranged with the control circuit board, or the detection circuit is integrated on the control circuit board.

In the preferable technical scheme of the cooker, the cooker further comprises an annular pot frame arranged on the cooking bench, and the annular pot frame is sleeved on the outer side of the annular burner.

As can be appreciated by those skilled in the art, the stove comprises a stove top and a detection device, wherein the stove top comprises an annular stove head, the detection device comprises a detection circuit and a first detection probe and a second detection probe which are arranged at opposite intervals, and the first detection probe and the second detection probe are positioned in the annular stove head 51, so that the first detection probe and the second detection probe can be protected, and the weight of a pot born by the first detection probe and the second detection probe can be reduced; for most bottom convex cookware, the reliability of first test probe and second test probe butt can also be improved to the setting so, and then improves the accuracy of detection. The first detection probe is in insulating connection with the second detection probe, the top end of the first detection probe is used for being abutted with the cooker, and the bottom end of the first detection probe is electrically connected with the first end of the detection circuit; the top end of the second detection probe is used for being abutted with the pot, and the bottom end of the second detection probe is electrically connected with the second end of the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of metal materials can form a detection loop through which a power supply signal passes, and at the moment, an electric signal exists in the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of nonmetallic materials can not form a detection loop through which a power supply signal passes, and at the moment, no electric signal exists in the detection circuit; therefore, whether the cooker is a metal cooker or a nonmetal cooker can be judged, and further, different dry burning prevention thresholds can be set for cookers made of different materials, so that the fine control of dry burning prevention is realized, the problems that an air source is closed in advance and the dry burning time is too long to cause food carbonization due to the fact that the dry burning prevention temperature is not reached are avoided, and the user experience is improved.

Drawings

Preferred embodiments of the detection device and the cooktop of the present invention are described below with reference to the accompanying drawings. The attached drawings are as follows:

FIG. 1 is a schematic structural view of the hob of the present invention;

FIG. 2 is an equivalent circuit diagram at the time of detection of the cooktop of the present invention;

FIG. 3 is a schematic structural view of a detection device of the kitchen range of the present invention;

FIG. 4 is an exploded view of the detection device of the hob of the present invention;

FIG. 5 is a cross-sectional view of a detection device of the cooktop of the present invention.

In the accompanying drawings: 1. a first detection probe; 11. a metal abutment; 111. a sliding part; 112. an abutting portion; 12. an elastic member; 13. a sleeve; 131. a slide tube portion; 132. closing in; 14. a connecting column; 141. a first wire passing channel; 2. a second detection probe; 21. a support column; 211. a second wire passage; 22. a metal contact; 3. a detection circuit; 31. equivalent resistance; 32. a power supply; 33. an ammeter; 34. a first wire; 35. a second wire; 4. an insulating connector; 5. a cooking bench; 51. an annular burner; 52. an annular mounting table; 6. an air pipe; 7. a temperature detector.

Detailed Description

First, it should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention. Those skilled in the art can make adjustments as needed to suit a particular application. For example, while the cooktop of the present invention is described in connection with a gas cooktop, this is not limiting and other devices with cooktop use requirements may be configured with the cooktop of the present invention.

Further, it should be noted that, in the description of the present invention, terms such as "inner", "outer", and the like, refer to directions or positional relationships based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the apparatus or components must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless explicitly specified and limited otherwise, the terms "connected," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be directly connected or indirectly connected through an intermediate medium, and can be the communication between the two components. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to the specific circumstances.

Gas cookers typically include gas supply systems, combustion systems, control systems, ignition systems, pot holders, drip trays, and the like. The gas supply system comprises a gas inlet pipe, a gas inlet pipe joint, a gas delivery pipeline formed by a gas guide pipe, a gas valve and the like. The combustion system comprises a nozzle, an air-conditioning plate ejector, a furnace end, a fire cover and the like, and fuel gas is ejected from the nozzle, and ambient air is introduced into the mixing pipe for full mixing under the ejection action of the ejector; the air regulating plate has the function of regulating the size of the air door to change the amount of primary air to improve the flame state, so that good combustion working condition is obtained. The burner is generally connected with the ejector into a whole, a fire cover is arranged on the burner, fire holes are uniformly distributed on the fire cover, and the burner is mainly used for uniformly distributing the mixed gas of fuel gas and air to the fire holes. The control system mainly comprises a flameout safety protection device and a timing flameout device. The safety flameout protection device has the function of automatically cutting off the air source to ensure safety when the flame is accidentally extinguished in the combustion process of the fuel gas. Of course, many gas cooker control systems now further include a dry burning prevention device, i.e., a temperature sensor is usually disposed on the gas cooker to detect the temperature change of the material in the cooker. When the detected temperature value exceeds the dry-burning prevention temperature threshold, the dry burning is judged to occur, and at the moment, the gas switch is automatically cut off, and the gas stove stops working. The ignition system of the gas range mainly includes an igniter, for example, a piezoelectric ceramic igniter, a pulse continuous igniter, etc., for igniting the gas.

The following describes a preferred technical scheme of the detection device and the stove of the invention in combination with the gas stove.

Referring first to fig. 1 and 2, fig. 1 is a schematic structural diagram of the stove of the present invention, and fig. 2 is an equivalent circuit diagram of the stove of the present invention in detection.

As shown in fig. 1 and 2, the cooker of the invention comprises a cooking bench 5 and a detection device; the cooktop 5 includes an annular burner 51; the detection device comprises: a detection circuit 3, and a first detection probe 1 and a second detection probe 2 which are arranged at opposite intervals; the first detection probe 1 and the second detection probe 2 are both positioned inside the annular furnace end 51; the first detection probe 1 and the second detection probe 2 are connected in an insulating way; the top end of the first detection probe 1 is used for being abutted with the pot, and the bottom end of the first detection probe 1 is electrically connected with the first end of the detection circuit 3; the top end of the second detection probe 2 is used for being abutted with the pot, and the bottom end of the second detection probe 2 is electrically connected with the second end of the detection circuit 3; the detection circuit 3, the first detection probe 1, the second detection probe 2 and the pot made of metal material can form a detection loop 3 through which the power supply signal passes.

Referring to fig. 1, the hob 5 may include an annular mounting table 52 and an annular burner 51, wherein the annular burner 51 is mounted inside the annular mounting table 52. The annular mounting table 52 can be used for mounting pot holders and the like. The annular burner 51 has a circular structure, and a fire hole is formed in the annular burner. The annular burner 51 has a vertical central axis. The bottom of the cooking bench 5 can be provided with a mounting space in which a nozzle, an air-conditioning plate ejector and the like are mounted. An air pipe 6 is arranged at the bottom of the cooking bench 5, and two ends of the air pipe 6 are respectively connected with an air source and a nozzle. The cooktop of the present invention may also include other structures, not limited herein.

The first detection probe 1 and the second detection probe 2 of the detection device are both positioned inside the annular furnace end 51, for example, the first detection probe 1 is positioned at the center of the annular furnace end 51, and the second detection probe 2 deviates from the vertical central axis of the annular furnace end 51; for another example, the second detecting probe 2 is located at the center position of the annular burner 51, and the first detecting probe 1 is deviated from the vertical center axis of the annular burner 51; for another example, the first detection probe 1 and the second detection probe 2 are opposite to each other and are located on both sides of the vertical center axis of the annular burner 51. The specific positions of the first detection probe 1 and the second detection probe 2 in the annular burner 51 are not limited in the embodiment of the present invention.

The structure of the first detection probe 1 may be various, for example, the first detection probe 1 includes a first connection column and a first metal contact disposed on the first connection column, where the first metal contact is used for abutting against a pot, and may be an iron contact, a copper contact, an aluminum contact, etc., and a person skilled in the art may select a material of the first metal contact according to conductivity, strength, price, etc., which is not limited herein. The first connecting column is installed inside the annular burner 51, and is provided with a first routing channel to accommodate a wire, i.e. the first metal contact is electrically connected with the detection circuit 3 through the wire. The first connecting column is connected with the second detection probe 1 in an insulating way through a connecting piece. For another example, the first detection probe 1 may include an insulating base, a metal column, and a contact disposed at the top end of the metal column, where the contact is used to abut against the pot; the insulating seat sets up in the bottom of metal column, and the inside at annular furnace end 5 is installed to the insulating seat, and at this moment, annular furnace end 5 and insulating seat all are provided with the wire hole to make detection circuitry 3 pass the wire hole and be connected with the metal column electricity. The first detection probe 1 may have other structures, and is not limited herein.

The structure of the second detection probe 2 may be various, for example, the second detection probe 2 includes a second connection post and a second metal contact disposed on the second connection post, where the second metal contact is used for abutting against a pot, and may be an iron contact, a copper contact, an aluminum contact, etc., and a person skilled in the art may select a material of the second metal contact according to the conductivity, the strength, the price, etc., which is not limited herein. The second connecting column is installed inside the annular burner 51, and the second connecting column is provided with a second routing channel to accommodate a wire, that is, the second metal contact is electrically connected with the detection circuit 3 through the wire. The second connecting column is connected with the second detection probe 1 in an insulating way through a connecting piece. For another example, the second detection probe 2 may include an insulating base, a metal column, and a contact disposed at the top end of the metal column, where the contact is used to abut against the pot; the insulating seat sets up in the bottom of metal column, and the inside at annular furnace end 5 is installed to the insulating seat, and at this moment, annular furnace end 5 and insulating seat all are provided with the wire hole to make detection circuitry 3 pass the wire hole and be connected with the metal column electricity. The second detection probe 2 may have other structures, and is not limited herein.

The structures of the second detection probe 2 and the first detection probe 1 may be identical, or the structures of the second detection probe 2 and the first detection probe 1 may be different. For example, the second detection probe 2 is further provided with a temperature detector for preventing dry combustion.

Optionally, the detection circuit 3 is installed at the bottom of the cooking bench 2, so that the table top of the cooking bench 2 is concise, the cleaning of a user is facilitated, the user experience is improved, and the detection circuit 3 is installed at the bottom of the cooking bench 2, so that the detection circuit 3 can be protected. In addition, first detection probe 1 can be connected with the first end electricity of detection circuitry 3 through the wire, and second detection probe 2 can be connected with the second end electricity of detection circuitry 3 through the wire, so set up can make detection circuitry 3 can install in the position of keeping away from first detection probe 1 and second detection probe 2, and detection circuitry 3 can install in the position of keeping away from pan and open fire promptly, further protects detection circuitry 3, improves the flexibility of detection circuitry 3 mounted position simultaneously.

Referring to fig. 2, in some specific embodiments, the detection circuit 3 may include a power source 32, an ammeter 33, a first wire 34, and a second wire 35, wherein the first wire 34 is electrically connected to the first detection probe 1 and the second wire 35 is electrically connected to the second detection probe 2; the ammeter 33 is connected in series in the detection circuit 3. The metal pot, the first detection probe 1 and the second detection probe 2 are equivalent to one resistor, which is defined as an equivalent resistor 31. At this time, the equivalent resistor 31, the power supply 32, the ammeter 33, the first wire 34 and the second wire 35 form a detection loop through which the power supply signal can pass, and the metal pot can conduct, so that the detection loop is conducted, and the ammeter 33 can detect the current; if the cooker is a non-metal cooker, the non-metal cooker cannot conduct electricity, and a detection loop cannot be formed. Of course, the detection circuit 3 may also detect an electrical signal by using other electrical components in addition to the ammeter 33, for example, the detection circuit 3 may also include a voltmeter, and the detection of whether the equivalent resistor 31 has a voltage by the voltmeter may determine whether the material of the pot is metal or nonmetal.

Generally, the pan has larger resistance, and even if electrified, the current and the voltage are smaller, so that the pan has no influence on a human body. In addition, the detection circuit 3 is designed with a grounding wire, so that electric shock of a user in the using process is further avoided.

The stove provided by the embodiment can further comprise a control device and a temperature detector, and the control device is respectively and electrically connected with the detection circuit 3 and the temperature detector. When the cooker is a metal cooker, the detection circuit 3, the first detection probe 1 and the second detection probe 2 form a detection loop through which a power supply signal can pass, after receiving the electric signal, the control device can judge that the current cooker is the metal cooker, and then the dry-heating prevention temperature threshold is set as the dry-heating prevention temperature threshold of the metal cooker; in the use process of the metal cooker, the temperature detector detects the temperature of the bottom of the metal cooker and sends the detected temperature to the control device, the control device compares the received detected temperature with an anti-dry-heating temperature threshold value of the metal cooker, judges whether the current metal cooker is in a dry-heating state or not, and if the detected temperature is higher than the anti-dry-heating temperature threshold value of the metal cooker, the current metal cooker is in the dry-heating state, and the control device controls the air source to be closed. When the pot is a non-metal pot, the detection circuit 3, the first detection probe 1 and the second detection probe 2 cannot form a detection loop because the non-metal pot is non-conductive, the detection circuit 3 is in a disconnected state, the detection device cannot receive an electric signal of the detection circuit 3, at this time, the control device judges that the current pot is the non-metal pot, and then the dry-heating prevention temperature threshold is set as the dry-heating prevention temperature threshold of the non-metal pot; in the use process of the nonmetal cooker, the temperature detector detects the temperature of the bottom of the nonmetal cooker and sends the detected temperature to the control device, the control device compares the received detected temperature with the dry-heating-preventing temperature threshold of the nonmetal cooker, judges whether the current nonmetal cooker is in a dry-heating state, and if the detected temperature is higher than the dry-heating-preventing temperature threshold of the nonmetal cooker, the non-metal cooker is in the dry-heating state currently, and the control device controls the air source to be closed.

It should be understood that the implementation of the functions of the control device described above may be implemented by hardware, such as a control circuit, or may be implemented by a software program, which is not limited herein.

It is understood that in the description of the embodiments of the present invention, the metal cookware is a cookware made of metal, and the nonmetal cookware is a cookware made of nonmetal material.

The stove provided by the embodiment of the invention comprises a stove and a detection device, wherein the stove comprises an annular stove head, the detection device comprises a detection circuit and a first detection probe and a second detection probe which are arranged at opposite intervals, and the first detection probe and the second detection probe are both positioned in the annular stove head 51, so that the first detection probe and the second detection probe can be protected, and the weight of cookware born by the first detection probe and the second detection probe can be reduced; for most bottom convex cookware, the reliability of first test probe and second test probe butt can also be improved to the setting so, and then improves the accuracy of detection. The first detection probe is in insulating connection with the second detection probe, the top end of the first detection probe is used for being abutted with the cooker, and the bottom end of the first detection probe is electrically connected with the first end of the detection circuit; the top end of the second detection probe is used for being abutted with the pot, and the bottom end of the second detection probe is electrically connected with the second end of the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of metal materials can form a detection loop through which a power supply signal passes, and at the moment, an electric signal exists in the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of nonmetallic materials can not form a detection loop through which a power supply signal passes, and at the moment, no electric signal exists in the detection circuit; therefore, whether the cooker is a metal cooker or a nonmetal cooker can be judged, and further, different dry burning prevention thresholds can be set for cookers made of different materials, so that the fine control of dry burning prevention is realized, the problems that an air source is closed in advance and the dry burning time is too long to cause food carbonization due to the fact that the dry burning prevention temperature is not reached are avoided, and the user experience is improved.

Referring now to fig. 3 to 5, wherein fig. 3 is a schematic structural view of the detecting device of the cooking appliance of the present invention, fig. 4 is an exploded view of the detecting device of the cooking appliance of the present invention, and fig. 5 is a sectional view of the detecting device of the cooking appliance of the present invention.

In one possible embodiment, the first detection probe 1 comprises: the metal butt joint 11 and with the elastic component 12 that is located metal butt joint 11 bottom, the top of metal butt joint 11 is used for with the pan butt, and the bottom of metal butt joint 11 is connected with elastic component 12.

Specifically, the top end of the metal abutting joint 11 is used for abutting against the cooker, and the top of the metal abutting joint can form a contact plane so as to increase the contact area with the cooker. After long-term use, the bottom of the pot is easy to form pot ash and the like, and in order to improve the detection accuracy, the top of the metal butt joint 11 can be provided with a contact tip, and the contact tip can pierce impurities such as pot ash and the like to contact the pot, so that the detection accuracy is further improved.

The elastic member 12 may be a metal member, and the elastic member 12 may be a non-metal member. When the elastic member 12 is a metal member, the top end of the elastic member 12 is connected to the bottom end of the metal abutment 11, and the bottom end of the elastic member 12 may be electrically connected to the first end of the detection circuit 3 through a wire, a metal column, or the like. At this time, the elastic member 12 may be a metal spring, and the top end of the metal spring abuts against the bottom end of the metal contact 11; alternatively, the elastic member 12 may be a metal column of a spiral structure, which may be an integral piece integrally formed with the metal abutment 11. When the elastic member 12 is a non-metal member, for example, the elastic member 12 is an elastic rubber member, the bottom end of the metal abutment 11 abuts against the bottom end of the elastic rubber member, and the metal abutment 11 can be electrically connected to the first end of the detection circuit 3 through a wire. Those skilled in the art can design the material and structure of the elastic member 12 according to the actual situation such as the metal abutment 11, and the embodiment of the invention is not limited herein.

According to the embodiment of the invention, the elastic piece 12 is arranged at the bottom of the metal abutting joint 11, so that the metal abutting joint 11 is in soft contact with the cooker, namely the elastic piece 12 can provide elastic force for the metal abutting joint 11, so that the metal abutting joint 11 can abut against the cooker, the metal abutting joint 11 is ensured to be fully contacted with the cooker, and the metal abutting joint 11 can be prevented from scratching the cooker.

On the basis of the embodiment, the first detection probe 1 further comprises a sleeve 13, wherein the bottom end of the metal abutting joint 11 is accommodated in the sleeve 13, and the top end of the metal abutting joint 11 extends out of the sleeve 13 to abut against the cooker; the elastic piece 12 is accommodated in the sleeve 13, so that the elastic piece 12 is arranged in the sleeve 13, the elastic piece 12 can be protected, the elastic piece 12 can be limited from tilting and shaking, and the elastic piece 12 is ensured to vertically support the metal abutting joint 11; the bottom end of the metal abutment 11 is accommodated in the sleeve 13, and the metal abutment 11 can slide along the sleeve 13 under the action of the elastic member 12, i.e., the sleeve 13 can also serve as a sliding channel for the metal abutment 11, limiting the movement direction of the metal abutment 11.

Furthermore, the sleeve 13 may be of a circular cylindrical structure, i.e. the sleeve 13 has a circular cross section; the cross section of the sleeve 13 may also be polygonal, e.g. triangular, rectangular, etc. Accordingly, in order to ensure the sliding stability of the metal abutment 11, the cross section of the mating portion of the metal abutment 11 with the sleeve 13 coincides with the sleeve 3. The cross-sectional shape of the sleeve 13 is not limited in the embodiment of the present invention. Preferably, the sleeve 13 is of a circular cylinder structure, which is convenient to process, attractive, free of sharp corners and edges and convenient to clean for a user when installed on the cooking bench 5.

In one possible embodiment, referring to fig. 5, the sleeve 13 includes a sliding tube portion 131 and a closing-in 132 located at the top end of the sliding tube portion 131, and the projection of the closing-in 132 onto the sliding tube portion 131 is located entirely within the sliding tube portion 131; the metal abutting joint 11 comprises a sliding part 111 and an abutting part 112 positioned at the top end of the sliding part 111, wherein the sliding part 111 is positioned in a sliding cylinder part 131, and the bottom end of the sliding part 111 abuts against the elastic piece 12; the abutting part 112 extends out of the closing-in 132 and is used for abutting against the cooker.

Specifically, the sliding tube 131 may have a cylindrical structure, the closing-in 132 may have a cylindrical structure, and the sliding tube 131 and the closing-in 132 are coaxial. The projection of the constriction 132 onto the slide tube portion 131 is entirely within the slide tube portion 131, i.e., the inside diameter of the constriction 132 is smaller than the inside diameter of the slide tube portion 131.

The abutting portion 112 of the metal abutting joint 11 extends out of the closing-in 132 to abut against the pot, the abutting portion 112 can form a tip, for example, the abutting portion 112 can be a pyramid, and the abutting portion 112 can be a conical structure. The sliding portion 111 of the metal abutting joint 11 has a cylindrical structure, and is located in the sliding tube portion 131, and under the action of the elastic member 12, the sliding portion 111 can slide up and down along the sliding tube portion 131, so as to drive the abutting portion 112 to move.

In order to prevent the metal abutment 11 from coming out of the sleeve 13, the diameter of the sliding portion 111 is greater than the diameter of the closing-in 132 and smaller than the diameter of the sliding tube portion 131.

In the embodiment, the sleeve 13 is provided with the sliding barrel part 131 and the closing-in part 132, the metal abutting joint 11 is provided with the sliding part 111 and the abutting part 112, the sliding part 111 is accommodated in the sliding barrel part 131, the abutting part 112 extends out of the closing-in part 132 to abut against the cooker, and under the action of the elastic piece 12, the sliding part 111 drives the abutting part 112 to move, so that soft contact between the abutting part 112 and the cooker is realized, the abutting part 112 can abut against the cooker, the abutting part 112 is ensured to fully contact with the cooker, and the abutting part 112 can be prevented from scratching the cooker; at the same time, the abutting portion 112 can be prevented from coming out of the inside of the closing-in 132.

In a possible embodiment, the first detection probe 1 further comprises a connection post 14 arranged at the bottom of the sleeve 13, the connection post 14 being provided with a first wire passage 141 communicating with the sleeve 13; the detection means comprise a first wire 34, and the metal abutment 11 is electrically connected to a first end of the detection circuit 3 through the first wire 34.

Wherein, the connecting post 14 is disposed at the bottom of the sleeve 13, and the connecting post 14 is detachably connected with the sleeve 13, so as to facilitate the installation of the elastic member 12 and the metal abutting joint 11. For example, the connecting post 14 is clamped with the sleeve 13; for another example, the connection post 14 is engaged with the sleeve 13. The first wire passage 141 provided to the connection post 14 may be a circular passage, and the first wire passage 141 is coaxial with the sleeve 13. The diameter of the first wire passing channel 141 is smaller than the inner diameter of the sleeve 13 so that the bottom end of the elastic member 12 abuts against the top end of the connecting post 14.

In some embodiments, the elastic member 12 is a non-metal member, one end of the first wire 34 is electrically connected to the bottom end of the metal abutment 11, and the other end of the first wire 34 passes through the first wire passing channel 141 to be electrically connected to the first end of the detection circuit 3, so that the metal abutment 11 is directly electrically connected to the first end of the detection circuit 3 through the first wire 34, the number of electrical connection points is reduced, and the structure is simplified, and meanwhile, the accuracy of detection is improved.

In other embodiments, the elastic member 12 is a metal member, one end of the first wire 34 is electrically connected to the bottom end of the elastic member 12, and the other end of the first wire 34 passes through the first wire passing channel 141 to be electrically connected to the first end of the detection circuit 3.

The first inspection probe 1 is described above, and the structure of the second inspection probe 2 is described in detail below.

In one possible implementation, the second detection probe 2 includes a support column 21 and a metal contact 22 disposed on a top surface of the support column 21, where the top surface of the metal contact 22 protrudes upward to form an arc contact surface, and the arc contact surface is used to abut against the pot.

In this embodiment, the second detection probe 2 is provided with the metal contact 22 on the top surface of the support column 21, and the top surface of the metal contact 22 is provided with an arc contact surface to be abutted with the cooker, so that the second detection probe 2 can be fully contacted with the cooker, and the reliability of detection is ensured.

The detection device of the embodiment further comprises an insulating connecting piece 4, and the insulating connecting piece 4 is respectively connected with the first detection probe 1 and the supporting column 21, so that the first detection probe 1 and the second detection probe 2 of the detection device can be fixed in the annular furnace end 51 through the same supporting column 21, and the complexity and the assembly difficulty of the structure are increased by avoiding setting a plurality of mounting points in the annular furnace end 51. The insulating connector 4 may be a connecting plate, a connecting post, or the like, which is not limited in the embodiment of the present invention. The insulating connector 4 is connected to the connection post 14 of the first detection probe 1, for example, the insulating connector 4 is clamped, screwed, or the like to the connection post 14. The insulating connector 4 is connected to the support column 21 of the second detection probe 2, for example, the insulating connector 4 is clamped to the support column 21, screwed to the support column 21, and the connection manner of the insulating connector 4 to the connection column 14 and the support column 14 is not limited in the embodiment of the present invention.

In some embodiments, the support column 21 is a metal column and the metal column is mounted within the annular burner 51. The detection circuit 3 is installed at the bottom of the cooking bench 5, a wire passing hole (not shown in the figure) is formed in the bottom of the annular burner 51, the other end of the detection circuit 3 passes through the wire passing hole and is electrically connected with the metal column, and the metal column can not only play a role in supporting the metal contact 22 and the first detection probe 1, but also serve as a part of the detection circuit to be electrically connected with the detection circuit 3. In order to avoid the conduction between the metal column and the cooking bench 5, an insulating seat can be arranged at the bottom end of the metal column, and a through hole is arranged on the insulating seat; the metal column is fixed on the cooking bench 5 through the insulating base, and the detection circuit 3 passes through the wire passing hole and the through hole of the insulating base to be electrically connected with the metal column. Preferably, the metal posts are integrally formed with the metal contacts 22 as a single piece, facilitating processing.

In other embodiments, the support column 21 is made of a non-metal material, and the second wire passing channel 211 is disposed in the support column 21; the detection device further comprises a second wire 35, one end of the second wire 35 is electrically connected with the metal contact 22, and the other end of the second wire 35 penetrates through the second wire passing channel 211 to be connected with the second end of the detection circuit 3, so that the metal contact 22 is directly electrically connected with the second end of the detection circuit 3 through the second wire 35, the electrical connection point can be reduced, the structure is simplified, and meanwhile, the detection accuracy is improved. At this time, the connection member between the first inspection probe 1 and the second inspection probe 2 may also be made of metal.

On the basis of the embodiment, the second wire passing channel 211 is also internally provided with the temperature detector 7, the temperature of the bottom of the pot is detected by the temperature detector 7, and the detected temperature is sent to the control device of the stove, so that the control device judges whether the pot is in a dry burning state according to the detected temperature and the dry burning prevention temperature threshold.

The temperature detector 7 includes a temperature sensing element and a temperature detection circuit electrically connected to the temperature sensing element, and the structure of the temperature detection circuit is not limited in the embodiment of the present invention. In some embodiments, the temperature sensing element is a metal contact 22, i.e. the metal contact 22 is used as the temperature sensing element, so that the arrangement is beneficial to simplifying the structure of the kitchen range. At this time, when the pot is a metal pot, the metal contact 22 has both the current of the detection circuit 3 and the current of the temperature detector 7, but the current of the detection circuit 3 is smaller, so that the influence on the temperature detector 7 is smaller and can be ignored. In other embodiments, in order to avoid the influence of the current of the detection circuit 3 on the temperature detector 7, the metal contact 22 is provided with an opening, the temperature sensing element is installed in the opening, and an insulating ring is arranged between the temperature sensing element and the opening, so that the influence of the current of the detection circuit 3 on the temperature detector 7 can be avoided, the accuracy of temperature detection of the temperature detector 7 is improved, and the temperature detector 7 can be installed in the second wire passing hole 211 to protect the temperature detector 7.

In a specific implementation, the kitchen range of the embodiment of the invention further comprises a control circuit board; the control circuit board can be arranged below the cooking bench 5, and can control the switch, the fire power and the like of the cooking range. The embodiment of the invention does not limit the specific structure of the control circuit board. The detection circuit 3 can be independently arranged with the control circuit board, so that the detection and maintenance of the detection circuit 3 are convenient. Alternatively, the detection circuit 3 is integrated on the control circuit board, which is advantageous for simplifying the control circuit of the hob.

In one possible implementation, the stove further comprises an annular pot holder (not shown) mounted on the cooking bench 5, the annular pot holder being sleeved outside the annular burner 51, the annular pot holder being mountable on an annular mounting table 52. The pot rack is used for bearing the pot, and the structure of the pot rack can be various, for example, the pot rack can comprise a bottom ring and a plurality of supporting arms arranged on the bottom ring, the supporting arms comprise vertical parts fixedly connected with the bottom ring and bending parts, the bending parts bend towards the center of the bottom ring, and more supporting surfaces are provided for the pot. The support arms are uniformly arranged at intervals along the circumference of the bottom ring so as to uniformly bear the gravity of the cooker. For another example, the pot holder may also include a waterproof tray and a plurality of support columns disposed on the waterproof tray, the plurality of support columns being disposed at uniform intervals along a circumference of the waterproof tray, and the kitchen range structure is simplified by integrating the waterproof tray with the pot holder. The pot holder can also be of other structures, and is not limited herein.

According to the embodiment, the annular pot holder is sleeved on the outer side of the annular furnace end 51, so that the first detection probe 1 and the second detection probe 2 can be protected, the weight of a pot borne by the first detection probe 1 and the second detection probe 2 can be reduced, and the service lives of the first detection probe 1 and the second detection probe 2 can be prolonged.

In summary, the stove comprises a stove top and a detection device, wherein the stove top comprises an annular stove head, the detection device comprises a detection circuit and a first detection probe and a second detection probe which are arranged at opposite intervals, and the first detection probe and the second detection probe are both positioned in the annular stove head 51, so that the first detection probe and the second detection probe can be protected, and the weight of cookware born by the first detection probe and the second detection probe can be reduced; for most bottom convex cookware, the reliability of first test probe and second test probe butt can also be improved to the setting so, and then improves the accuracy of detection. The first detection probe is in insulating connection with the second detection probe, the top end of the first detection probe is used for being abutted with the cooker, and the bottom end of the first detection probe is electrically connected with the first end of the detection circuit; the top end of the second detection probe is used for being abutted with the pot, and the bottom end of the second detection probe is electrically connected with the second end of the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of metal materials can form a detection loop through which a power supply signal passes, and at the moment, an electric signal exists in the detection circuit; the detection circuit, the first detection probe, the second detection probe and the pot made of nonmetallic materials can not form a detection loop through which a power supply signal passes, and at the moment, no electric signal exists in the detection circuit; therefore, whether the cooker is a metal cooker or a nonmetal cooker can be judged, and further, different dry burning prevention thresholds can be set for cookers made of different materials, so that the fine control of dry burning prevention is realized, the problems that an air source is closed in advance and the dry burning time is too long to cause food carbonization due to the fact that the dry burning prevention temperature is not reached are avoided, and the user experience is improved.

Thus far, the technical solution of the present invention has been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of protection of the present invention is not limited to these specific embodiments. Equivalent modifications and substitutions for related technical features may be made by those skilled in the art without departing from the principles of the present invention, and such modifications and substitutions will fall within the scope of the present invention.

Claims

1. A cooktop, comprising: a cooking bench, a detection device, a control device and a temperature detector; the cooking bench comprises an annular burner; the detection device includes: the detection circuit, the first detection probe and the second detection probe are arranged at intervals, and the first detection probe and the second detection probe are both positioned in the annular furnace end; the control device is respectively and electrically connected with the detection circuit and the temperature detector;

the first detection probe is connected with the second detection probe in an insulating way;

the top end of the first detection probe is used for being abutted with the pot, and the bottom end of the first detection probe is electrically connected with the first end of the detection circuit;

the top end of the second detection probe is used for being abutted with the pot, and the bottom end of the second detection probe is electrically connected with the second end of the detection circuit;

the detection circuit, the first detection probe, the second detection probe and the cooker made of metal materials can form a detection loop through which a power supply signal passes, and the electric signal is used for the control device to call an anti-dry-heating temperature threshold value of the metal cooker;

when the cooker is made of non-metal materials, the control device is used for calling a dry-heating prevention temperature threshold value of the non-metal cooker when the fact that the electric signal sent by the detection circuit is not received is determined;

The first detection probe comprises a first metal column and a metal butt joint arranged on the top surface of the first metal column; the second detection probe comprises a support column and a metal contact arranged on the top surface of the support column, and the support column is a second metal column; the detection device further comprises an insulating connecting piece, and the insulating connecting piece is respectively connected with the first detection probe and the support column;

the second detection probe is provided with the temperature detector, the temperature detector comprises a temperature sensing element, and the temperature sensing element is the metal contact; or an opening is formed in the metal contact, the temperature sensing element is installed in the opening, and an insulating ring is arranged between the temperature sensing element and the opening.

2. The cooktop of claim 1, wherein the first detection probe further comprises an elastic member located at the bottom of the metal abutment, the top end of the metal abutment is used for abutting against the pot, and the bottom end of the metal abutment is connected with the elastic member.

3. The cooktop of claim 2, wherein the first metal post comprises a sleeve, the sleeve comprises a sleeve portion and a neck at a top end of the sleeve portion, and a projection of the neck onto the sleeve portion is entirely within the sleeve portion;

The metal abutting joint comprises a sliding part and an abutting part positioned at the top end of the sliding part, the sliding part is positioned in the sliding cylinder part, and the bottom end of the sliding part is abutted with the elastic piece; the abutting part extends out of the closing-in part and is used for abutting against the cooker.

4. The cooktop of claim 3, wherein the first metal post comprises a connecting post disposed at a bottom of the sleeve, the connecting post being provided with a first wire passage in communication with the sleeve;

The detection device further comprises a first wire;

One end of the first wire is electrically connected with the bottom end of the metal butt joint, and the other end of the first wire penetrates through the first wire passing channel to be electrically connected with the first end of the detection circuit; or the elastic piece is a metal piece, one end of the first wire is electrically connected with the bottom end of the elastic piece, and the other end of the first wire penetrates through the first wire passing channel to be electrically connected with the first end of the detection circuit.

5. The cooktop of claim 1, wherein the top surface of the metal contact protrudes upward to form an arcuate contact surface for abutment with the cooktop.

6. The cooktop of claim 5, wherein the second metal post is mounted within the annular burner;

the detection circuit is arranged at the bottom of the cooking bench;

the bottom of the annular furnace end is provided with a wire passing hole, and the second end of the detection circuit passes through the wire passing hole and is electrically connected with the second metal column.

7. The cooktop of claim 5, wherein the support posts are provided with a second wire passage;

the detection device further comprises a second wire, one end of the second wire is electrically connected with the metal contact, and the other end of the second wire penetrates through the second wire passing channel to be connected with the second end of the detection circuit.

8. The cooktop of any of claims 1-7, further comprising a control circuit board;

The detection circuit is independently arranged with the control circuit board, or the detection circuit is integrated on the control circuit board.

9. The hob according to any one of the claims 1 to 7, characterized in, that the hob further comprises an annular pot rack mounted on the hob, which annular pot rack is sleeved outside the annular burner.