CN211121480U

CN211121480U - Sensor assembly and electromagnetic heating equipment

Info

Publication number: CN211121480U
Application number: CN201922298530.XU
Authority: CN
Inventors: 赵克芝; 朱丰
Original assignee: Shenzhen Chk Co ltd
Current assignee: Shenzhen Chk Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-07-28
Anticipated expiration: 2029-12-19

Abstract

The application relates to a sensor assembly and an electromagnetic heating device. Foretell sensor module is used for being connected with electromagnetic heating equipment's organism and control panel, and the organism includes the support panel who is used for supporting the kettle body of electromagnetic heating equipment, and sensor module includes the contact piece, and the contact piece is used for conflicting with one side that deviates from the kettle body of support panel to be connected with the control panel electricity and form self-capacitance, in order to detect the internal liquid volume of kettle. When the kettle body is placed on the supporting panel, the supporting panel generates elastic deformation and presses the contact piece, and the contact piece is electrically connected with the control panel and forms a self-capacitance with the ground, so that the value of the self-capacitance changes along with the change of the liquid amount in the kettle body placed on the supporting panel to detect the liquid amount in the kettle body, namely the liquid amount detection of the kettle body is realized; because the sensor assembly and the kettle body are respectively arranged on two sides of the supporting panel of the machine body, the structure of the electromagnetic heating equipment is simple and easy to realize, and the problem that the structure of the electromagnetic heating equipment is complex is solved.

Description

Sensor assembly and electromagnetic heating equipment

Technical Field

The application relates to the technical field of electromagnetic heating, in particular to a sensor assembly and electromagnetic heating equipment.

Background

The electromagnetic heating equipment comprises an electric kettle, an electromagnetic oven, an electromagnetic induction heating water dispenser, an electromagnetic heating stove and the like. Wherein, the operating principle of the electric kettle is as follows: the steam generated when the water boils makes the bimetallic strip of the steam temperature sensing element deform, the deformation pushes the power switch to cut off the power through the lever principle, and the power cut-off is not self-resetting, so the kettle can not be automatically reheated after the power cut-off.

A water quantity detection sensor is arranged in a machine body of a traditional electromagnetic kettle, such as an ultrasonic module for detecting water quantity, so as to detect the water quantity in the kettle body; or, the water level detection sensor is arranged in the kettle body to detect the water amount in the kettle body. However, the difficulty of setting the induction component for detecting the water amount of the conventional electromagnetic heating device is high, and if the waterproof problem of the induction component needs to be considered, the structure of the electromagnetic heating device is complex.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a sensor assembly and an electromagnetic heating apparatus for solving the problem of complicated structure of the electromagnetic heating apparatus.

A sensor assembly for connection with a body and a control panel of an electromagnetic heating apparatus, the body including a support panel for supporting a kettle body of the electromagnetic heating apparatus, the sensor assembly comprising:

and the contact piece is abutted against one side of the support panel, which is far away from the kettle body, and is electrically connected with the control panel to form a self-capacitance so as to detect the liquid amount in the kettle body.

In one embodiment, the contact piece is a strip-shaped conductor piece or a semiconductor piece, so that the contact piece is in an open-loop structure without a closed loop, and the problem of self-heating of the contact piece due to the action of a magnetic field is avoided.

In one embodiment, the contact piece is formed by winding a conducting wire made of a conductor or a semiconductor material, and the head end and the tail end of the contact piece are not connected, so that the contact piece is an open ring which is not closed, the problem of self-heating of the structure of the contact piece under the action of a magnetic field is avoided, and the structure of the contact piece is simpler.

In one embodiment, the contact sheet is in a shape of a strip, an arc belt, a circular sheet, a polygonal sheet, an oval sheet, a spider web or a snowflake.

In one embodiment, the control board is spaced from the contact sheet; the sensor assembly further comprises a wire, one end of the wire is connected with the contact piece, and the other end of the wire is connected with the control board, so that the contact piece is electrically connected with the control board.

In one embodiment, the sensor assembly further comprises a bracket supporting the contact piece, the bracket is used for being connected with the machine body, so that the contact piece is connected with the machine body, and the contact piece can be reliably abutted with the supporting panel.

In one embodiment, the sensor assembly further comprises a thermistor, a containing groove is formed in one surface of the support, which is close to the contact piece, the thermistor is located in the containing groove and connected with the support, the thermistor is used for abutting against the supporting panel and is electrically connected with the control panel, so that the temperature of the kettle body is transmitted to the thermistor through the supporting panel, and the thermistor can detect the temperature of the kettle body.

In one embodiment, the sensor assembly further comprises a telescopic temperature measuring head, the telescopic temperature measuring head is connected with the support, and the telescopic temperature measuring head is electrically connected with the control panel and penetrates through the supporting panel to abut against the bottom of the kettle body, so that the temperature of the kettle body is directly transmitted to the telescopic temperature measuring head, and the temperature of the kettle body is detected more accurately.

An electromagnetic heating device comprises a machine body, a kettle body, a control panel and the sensor assembly in any embodiment, wherein a supporting panel for supporting the kettle body is formed on the machine body, a contact piece is abutted against one side of the supporting panel, which is far away from the kettle body, and the contact piece is electrically connected with the control panel and forms a self-capacitance.

In one embodiment, the contact piece is parallel to the bottom surface of the kettle body, and the distance between the contact piece and the bottom surface of the kettle body is 1mm to 50mm, so that the kettle body can be better heated by the machine body.

In one embodiment, an included angle exists between the contact piece and the bottom surface of the kettle body, and the included angle ranges from more than 0 to less than 90 degrees.

According to the sensor assembly and the electromagnetic heating device, the contact piece of the sensor assembly is abutted against one side, away from the kettle body, of the support panel of the machine body, when the kettle body is placed on the support panel, the support panel generates elastic deformation and presses the contact piece, and since the contact piece is electrically connected with the control panel and forms a self-capacitance with the ground, the numerical value of the self-capacitance changes along with the change of the liquid amount in the kettle body placed on the support panel, so that the liquid amount in the kettle body is detected, and the liquid amount detection of the kettle body is realized; because the sensor assembly and the kettle body are respectively arranged on two sides of the supporting panel of the machine body, the structure of the electromagnetic heating equipment is simple and easy to realize, and the problem that the structure of the electromagnetic heating equipment is complex is solved.

Drawings

FIG. 1 is a schematic view of an electromagnetic heating apparatus of an embodiment;

FIG. 2 is a partial schematic view of the electromagnetic heating apparatus of FIG. 1;

FIG. 3 is a schematic view of a contact pad of a sensor assembly of the electromagnetic heating apparatus of FIG. 1;

fig. 4 is a schematic view of a contact piece of a sensor assembly of an electromagnetic heating apparatus of another embodiment;

FIG. 5 is a partial schematic view of the electromagnetic heating apparatus of FIG. 1;

fig. 6 is a partial schematic view of an electromagnetic heating apparatus of another embodiment.

Detailed Description

To facilitate an understanding of the present application, the sensor assembly and electromagnetic heating apparatus will be described more fully below with reference to the associated drawings. Preferred embodiments of the sensor assembly and electromagnetic heating apparatus are shown in the accompanying drawings. However, the sensor assembly and electromagnetic heating apparatus may be embodied in many different forms and are not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the sensor assembly and the electromagnetic heating apparatus.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the sensor assembly and the electromagnetic heating apparatus is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1, an electromagnetic heating apparatus 10 of an embodiment includes a body 100, a kettle body 200, a control board 300, and a sensor assembly 400. The body 100 comprises a support panel 110 for supporting the kettle body 200. The kettle body 200 is placed on the support panel 110 such that the support panel 110 supports the kettle body 200. In the present embodiment, the electromagnetic heating device 10 is an electric kettle. It is understood that the pot 200 may be integrally formed with the body 100, or may be formed separately from the body 100. In this embodiment, the pot 200 and the body 100 are formed separately.

Referring also to fig. 2, in one embodiment, the sensor assembly 400 is connected to the body 100 and the control board 300 of the electromagnetic heating apparatus 10. The sensor assembly 400 includes a contact strip 410. The contact piece 410 abuts against the side of the support panel 110 away from the kettle body 200 and is electrically connected to the control board 300 to form a self-capacitance for detecting the amount of liquid in the kettle body 200. In this embodiment, the supporting panel is an insulating supporting medium. The contact sheet is electrically connected with the control panel to form a self-capacitor, so that the kettle body, the support panel and the contact sheet form the self-capacitor.

It can be understood that the number of the contact pieces is at least one, and at least one contact piece is electrically connected with the capacitance detection circuit of the control board, so that the contact piece is electrically connected with the control board to form a self-capacitance. In this embodiment, the number of the contact pieces is one, and the contact pieces are electrically connected to the capacitance detection circuit of the control board. The kettle body is placed on the supporting panel, and when the liquid amount in the kettle body is changed, the capacitance of the self-body capacitor is changed, so that the liquid level information in the kettle body can be measured. In other embodiments, the number of the contact pieces is at least two, at least one contact piece is electrically connected with the capacitance detection circuit of the control board, at least one contact piece is connected with the ground of the control board, the kettle body is placed on the supporting panel, and when the liquid amount in the kettle body is changed, the capacitance of the self-capacitance is changed to detect the liquid level information in the kettle body.

In the sensor assembly 400 and the electromagnetic heating device 10, the contact piece 410 of the sensor assembly 400 is abutted against one side of the support panel 110 of the machine body 100, which is away from the kettle body 200, when the kettle body 200 is placed on the support panel 110, the support panel 110 is elastically deformed and presses the contact piece 410, and since the contact piece 410 is electrically connected with the control board 300 and forms a self-capacitance, the value of the self-capacitance changes along with the change of the liquid amount in the kettle body 200 placed on the support panel 110, so as to detect the liquid amount in the kettle body 200, namely, the liquid amount detection of the kettle body 200 is realized; since the sensor assembly 400 and the kettle body 200 are respectively disposed at two sides of the support panel 110 of the machine body 100, the structure of the electromagnetic heating device 10 is simple and easy to implement, and the problem of complex structure of the electromagnetic heating device 10 is solved.

The traditional electric heating kettle has two types: one is that the kettle is made of non-metal materials such as glass, etc., and is heated directly by a heating plate, or a connecting seat is arranged between the base and the kettle to supply power to the heating plate at the bottom of the kettle for heating; the second is electromagnetic heating, but the kettle body 200 is made of metal magnetic material. Wherein, the first kettle is provided with the risk that the connecting socket has the electric leakage. The second kind of water bottle is limited to magnetic conductive metal material, and because some elements harmful to human body are required to be added in the manufacturing process of the metal material, the metal material is not beneficial to the health of users. Referring again to fig. 1, in one embodiment, the kettle body 200 includes a kettle body 210 and a kettle bottom 220 connected together, and both the kettle body 210 and the kettle bottom 220 are made of glass.

In one embodiment, contact patch 410 has at least one metal patch or coated conductor or semiconductor device. In this embodiment, contact patch 410 has a single or multiple sheet metal conductor device. In other embodiments, contact patch 410 may also be a conductor device with a single or multiple thin metal film patches, or a conductor device with a single or multiple coatings. Specifically, contact patch 410 has a single or multiple metal sheets or metal thin film sheets or coatings or similar conductive or semiconductor devices.

In one embodiment, the contact strip 410 is a strip-shaped conductor strip or a semiconductor strip, so that the contact strip is an open-loop structure without a closed loop, thereby avoiding the problem of self-heating of the contact strip due to the action of a magnetic field. In the embodiment, the contact piece 410 is a strip-shaped aluminum sheet, so that the contact piece 410 has non-magnetic conductivity, and the problem of self-heating of the contact piece 410 due to the action of a magnetic field is avoided. In other embodiments, the contact plate 410 may be a sheet of a non-magnetic material other than aluminum. In one embodiment, the contact piece is a strip-shaped aluminum sheet.

As shown in fig. 3 and 4, in one embodiment, the contact sheet 410 is a non-closed loop sensing sheet structure having at least one opening 412, so as to avoid the problem that the structure of the contact sheet 410 is self-heated due to the magnetic field. In one embodiment, the contact piece 410 is made by winding a conductive wire made of a conductive or semi-conductive material, and the head end and the tail end of the contact piece are not connected, so that the contact piece is an open non-closed loop, thereby preventing the self-heating problem caused by the magnetic field acting on the structure of the contact piece, and simultaneously making the structure of the contact piece simpler. In one embodiment, the contact piece 410 is in the shape of a strip, an arc-shaped band, a circular sheet, a polygonal sheet, an oval sheet, a spider web, or a snowflake. In the present embodiment, the contact sheet 410 is a non-closed loop sensing sheet structure distributed in a strip shape.

As shown in fig. 3, in one embodiment, contact strip 410 includes a first strip element 411, a connection strip 413, and a second strip element 415. The first sheet unit 411 is connected with the second sheet unit 415 through a connecting sheet 413, a distance exists between the first sheet unit 411 and the second sheet unit 415, an opening 412 is formed among the first sheet unit 411, the connecting sheet 413 and the second sheet unit 415, and the contact sheet 410 is in a strip shape and is provided with a non-closed loop sensing sheet structure with at least one opening 412.

As shown in fig. 2, in one embodiment, control board 300 is spaced from contact pads 410. The sensor assembly 400 further includes a wire 420, one end of the wire 420 is connected to the contact pad 410, and the other end of the wire 420 is connected to the control board 300, so that the contact pad 410 is electrically connected to the control board 300. In the present embodiment, the contact piece 410 is connected to the control board 300 by soldering through the wire 420. In other embodiments, the contact strip 410 may also be connected to the control board 300 by means of adhesive or metal riveting or contact interference fit.

As shown in fig. 2, in order to connect the contact piece 410 with the body 100 and to enable the contact piece 410 to reliably abut against the support panel 110, in one embodiment, the sensor assembly 400 further includes a bracket 430, and the bracket 430 supports the contact piece 410. The bracket 430 is used to connect with the machine body 100 so that the contact piece 410 is connected with the machine body 100 and the contact piece 410 can be reliably abutted with the support panel 110. In the present embodiment, the contact piece 410 is disposed above the control board 300, and the contact piece 410 is disposed on the bracket 430.

As shown in FIG. 5, in one embodiment, the sensor assembly 400 further includes a thermistor 440. The bracket 430 has a receiving groove 432 on a surface thereof adjacent to the contact piece 410, and the thermistor 440 is located in the receiving groove 432 and connected to the bracket 430. The thermistor 440 abuts against the support panel and is electrically connected to the control board, so that the temperature of the kettle body is conducted to the thermistor through the support panel, and the thermistor can detect the temperature of the kettle body. It will be appreciated that the thermistor may be in indirect contact with the support panel via the contact tab, or may be in direct contact with the support panel, such that the temperature of the support panel is conducted to the thermistor.

In the present embodiment, the thermistor may be indirectly contacted with the support panel through the contact piece. Specifically, the thermistor abuts against the surface of the contact piece 410 away from the support panel, so that the temperature of the kettle body 200 is transmitted to the thermistor 440 through the support panel 110 and the contact piece 410 in sequence, and the thermistor 440 can detect the temperature of the kettle body 200. In this embodiment, the contact piece 410 mainly plays a role of collecting temperature and sensing water amount. In the present embodiment, the thermistor 440 is a Negative Temperature Coefficient (NTC) resistor.

It is understood that in other embodiments, the temperature measuring resistor of the sensor assembly may not be limited to the arrangement of the thermistor. As shown in FIG. 6, in one embodiment, the sensor assembly 400 further includes a telescoping temperature probe 450 that is coupled to the support 430. The telescopic temperature probe 450 is electrically connected with the control panel and penetrates through the support panel 110 to abut against the bottom of the kettle body 200, so that the temperature of the kettle body 200 is directly conducted to the telescopic temperature probe, and the temperature of the kettle body is detected more accurately. In the embodiment, the supporting panel 110 has a mounting hole 112, and the retractable thermal probe 450 is inserted into the mounting hole and connected to the supporting panel 110, so that the retractable thermal probe 450 penetrates through the supporting panel 110.

Referring again to fig. 1, in one embodiment, the electromagnetic heating apparatus 10 further comprises an electromagnetic wire coil 500. The housing 100 has a housing chamber 120 formed therein, and the electromagnetic wire coil 500, the control board 300 and the contact piece 410 are all located in the housing chamber 120. The electromagnetic wire coil 500 is parallel to and opposite to the contact piece 410, and the contact piece 410 is abutted against one side of the support panel 110 departing from the heater, so that the electromagnetic wire coil 500 is parallel to and opposite to the support panel 110, and the electromagnetic wire coil 500 can heat the kettle body 200 better.

Referring again to fig. 1, in one embodiment, the holder 430 is inserted into the electromagnetic coil 500 such that the holder 430 is connected to the electromagnetic coil 500. In this embodiment, the bracket 430 is connected to the center of the electromagnetic coil 500, so that the bracket 430 is connected to the electromagnetic coil 500, and the contact piece 410 is arranged opposite to the center of the electromagnetic coil 500, so that the electromagnetic coil 500 can heat the kettle body 200 better. Further, the electromagnetic wire coil 500 is provided with a slot 510, one side of the bracket 430 adjacent to the electromagnetic coil is provided with a boss 434, and the boss 434 is inserted into the slot 510, so that the bracket 430 is inserted into the electromagnetic wire coil 500. In this embodiment, the bracket 430 is an elastic bracket, so that the bracket 430 can be better inserted into the electromagnetic wire coil 500. In one embodiment, the support 430 is a silicone frame, so that the support 430 has better elasticity.

In one embodiment, the supporting panel 110 is a concave structure, and the portion of the kettle body 200 adjacent to the body 100 is a concave step structure, so that an air circulation area is formed between the kettle body 200 and the supporting panel 110 for air circulation and heat dissipation. In one embodiment, the height of the step structure is 1 mm-10 mm, so that air can be better circulated between the kettle body 200 and the support panel 110 for heat dissipation. In this embodiment, the height of the step structure is 4 mm.

Referring again to fig. 2, in one embodiment, the bottom surface of the kettle body 200 is formed with a heating layer 230, the contact sheet having an intersection area with the bottom of said kettle body in a horizontal projection plane. Further, the size of the intersecting area is 20% to 100% of the bottom area of the container, so that the contact piece can accurately detect the water level in the kettle body.

Referring again to fig. 2, in one embodiment, the heating layer 230 is formed at a position of the kettle body 200 adjacent to the machine body 100, and a projected area of the heating layer 230 on the supporting panel 110 is larger than a projected area of the contact piece 410 on the supporting panel 110. The distance between the heating layer 230 and the contact sheet 410 is less than or equal to 30mm, so that the electromagnetic wire coil 500 can better heat the heating layer 230.

Referring again to fig. 1, in order to make the temperature measurement of the kettle body 200 more accurate, further, the electromagnetic heating device 10 further includes a temperature measuring assembly 600. The inner side wall of the supporting panel 110 is provided with a mounting hole 112 communicated with the accommodating cavity 120, and the temperature measuring component 600 is arranged in the mounting hole 112 in a penetrating way and connected with the supporting panel 110. The temperature measuring assembly 600 is connected with the control board 300, and the temperature of the liquid in the kettle body 200 can be better and accurately measured by the control board 300 according to the temperature data information sensed by the temperature measuring assembly 600 and the thermistor 440.

Referring to fig. 1 again, further, the machine body 100 is provided with an air inlet 130 and an air outlet 140, and both the air inlet 130 and the air outlet 140 are communicated with the accommodating cavity 120, so that air around the machine body 100 enters through the air inlet 130 and flows out from the air outlet 140, thereby facilitating heat dissipation of the electromagnetic wire coil 500.

In one embodiment, the contact piece is parallel to the bottom surface of the kettle body, and the distance between the contact piece and the bottom surface of the kettle body is 1mm to 50mm, so that the machine body can better heat the kettle body. It will be appreciated that in other embodiments the contact may not be parallel to the base of the kettle body. In one embodiment, an included angle exists between the contact piece and the bottom surface of the kettle body, and the included angle ranges from more than 0 to less than 90 degrees.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present application shall be subject to the appended claims.

Claims

1. A sensor assembly for connection with a body and a control panel of an electromagnetic heating apparatus, the body including a support panel for supporting a kettle body of the electromagnetic heating apparatus, the sensor assembly comprising:

2. The sensor assembly of claim 1, wherein the contact strip is a strip-shaped conductor strip or a semiconductor strip.

3. The sensor assembly of claim 1, wherein the contact strip is wound from a wire made of a conductive or semi-conductive material, and the head end and the tail end of the contact strip are not connected to a non-closed loop sensing strip having at least one opening, such that the contact strip is in a non-closed open loop configuration.

4. A sensor assembly according to claim 3, wherein the contact pad is in the form of a strip or an arc-shaped strip or a circular pad or a polygonal pad or an oval pad or a spider web or snowflake pad.

5. The sensor assembly of claim 1, wherein the control board is spaced from the contact pad; the sensor assembly further comprises a wire, one end of the wire is connected with the contact piece, and the other end of the wire is connected with the control board, so that the contact piece is electrically connected with the control board.

6. The sensor assembly of any one of claims 1 to 5, further comprising a bracket supporting the contact piece, the bracket for connection with the body.

7. The sensor assembly of claim 6, further comprising a thermistor, wherein a receiving slot is formed on a surface of the bracket adjacent to the contact piece, the thermistor is located in the receiving slot and connected to the bracket, and the thermistor is configured to abut against the supporting panel and electrically connected to the control board.

8. The sensor assembly of claim 6, further comprising a telescopic temperature measuring head connected to the bracket, wherein the telescopic temperature measuring head is electrically connected to the control board and penetrates through the support panel to abut against the bottom of the kettle body.

9. An electromagnetic heating apparatus comprising a body, a kettle body, a control board and the sensor assembly of any one of claims 1 to 8, wherein the body is formed with a support panel for supporting the kettle body, the contact piece is abutted against a side of the support panel away from the kettle body, and the contact piece is electrically connected to the control board and forms a self-capacitance with the ground.

10. The electromagnetic heating device of claim 9, characterized in that said contact piece is parallel to the bottom surface of said kettle body, and the distance between said contact piece and the bottom surface of said kettle body is 1mm to 50 mm;

or an included angle exists between the contact piece and the bottom surface of the kettle body, and the included angle ranges from more than 0 to less than 90 degrees.