CN217390439U

CN217390439U - Sensing mechanism, empty pot detection device and electric rice cooker

Info

Publication number: CN217390439U
Application number: CN202221405222.8U
Authority: CN
Inventors: 不公告发明人
Original assignee: Sanqiaohui Foshan New Material Co ltd
Current assignee: Sanqiaohui Foshan New Material Co ltd
Priority date: 2022-06-06
Filing date: 2022-06-06
Publication date: 2022-09-09
Anticipated expiration: 2032-06-06

Abstract

The utility model relates to a sensor and domestic appliance technical field specifically are a sensing mechanism, empty pot detection device and electric rice cooker, include: the detection assembly comprises two conducting strips and two signal wires, wherein one conducting strip is connected with one end of one signal wire, the other conducting strip is connected with one end of the other signal wire, and the other ends of the two signal wires are electrically connected with an external power supply; the inner tube is provided with a winding post, the two conducting strips are arranged on the inner tube and are not in contact with each other, and the signal wire bypasses the winding post and is electrically connected with the external power supply. The winding posts are arranged on the inner barrel, so that the signal wire is connected with the external power supply after bypassing the signal wire, the winding posts play a role in supporting and fixing the signal wire, the stress of the signal wire at the joint of the signal wire and the conducting strip is reduced, and the stability of the signal wire is improved.

Description

Sensing mechanism, empty pot detection device and electric rice cooker

Technical Field

The utility model relates to a sensor and domestic appliance technical field specifically are a sensing mechanism, empty pot detection device and electric rice cooker.

Background

Empty pot detection device is widely used to electric rice cooker, when the pot body was placed on empty pot detection device, empty pot detection device atress compressed, thereby make the sensing mechanism among the empty pot detection device sense the pot body, current sensing mechanism includes sensing element, conducting strip and signal line, the signal line is with sensing element, the conducting strip is parallelly connected together, the tie point of sensing element and signal line is located the conducting strip, after signal line and sensing element are connected, the signal line does not do any fixed processing, lead to follow-up workman in the process or the long-time use of operation sensing mechanism equipment, the junction atress of signal line and conducting strip, lead to the signal line to drop from the conducting strip easily.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a sensing mechanism, empty pot detection device and electric rice cooker aim at solving the junction atress of signal line and conducting strip among the prior art, leads to the technical problem that the signal line drops from the conducting strip easily.

In order to achieve the above object, the utility model provides a sensing mechanism, empty pot detection device and electric rice cooker, include:

the detection assembly comprises two conducting strips and two signal wires, wherein one conducting strip is connected with one end of one signal wire, the other conducting strip is connected with one end of the other signal wire, and the other ends of the two signal wires are electrically connected with an external power supply;

the inner cylinder is provided with a winding post, the two conducting strips are arranged on the inner cylinder and are not contacted, and the signal wire bypasses the winding post and is electrically connected with the external power supply. The winding posts are arranged on the inner barrel, so that the signal wire is connected with the external power supply after bypassing the signal wire, the winding posts play a role in supporting and fixing the signal wire, the stress of the signal wire at the joint of the signal wire and the conducting strip is reduced, and the stability of the signal wire is improved.

Preferably, the detection assembly further includes an inductive element, a conductive post, and an inner spring, the inductive element is mounted on the inner cylinder, the inductive element is electrically connected to the two conductive posts, one end of the inner spring abuts against the conductive post, and the other end of the inner spring abuts against the inner cylinder; when the inner spring is not compressed, the conductive column is abutted with the two conductive sheets. The conductive column and the inner spring form a control switch, and compared with a magnetic reed switch and a microswitch, the switch has the advantages of simple structure and high temperature resistance.

Preferably, the inner cylinder is provided with a placement groove, and the sensing element is located in the placement groove. The sensing element is not impacted, and the sensing element is protected.

Preferably, the inner cylinder is provided with a second mounting groove, the second mounting groove is located at one end of the inner cylinder away from the placing groove, and the conductive post and the inner spring are both located in the second mounting groove. Prevent that conductive pillar from taking place the displacement of other directions in the in-process of reciprocating.

Preferably, the inner cylinder is further provided with a first mounting groove, the conductive plate includes a vertical portion and a horizontal portion, one end of the vertical portion is connected to one end of the horizontal portion and is perpendicular to the horizontal portion, the vertical portion is located in the first mounting groove, and the horizontal portion is located outside the first mounting groove, extends in the direction of the second mounting groove, and abuts against the conductive post.

Preferably, the device further comprises a middle cylinder for preventing the conductive column from shifting when moving up and down, wherein the middle cylinder is sleeved on the conductive column and is abutted against the inner cylinder. And meanwhile, the moving direction of the conductive column is limited, so that the conductive column can only move up and down, the conductive column is limited to move towards other directions, and the stability of the switch is improved.

Preferably, the inner cylinder is further provided with a winding slot, the winding post is located in the winding slot, and the signal wire is located in the winding slot. Further supporting and fixing the signal wire.

On the other hand, the utility model also provides an empty pot detection device, including foretell sensing mechanism, still include urceolus, aluminium lid, outer spring and base, above-mentioned sensing mechanism is located above-mentioned urceolus, and above-mentioned aluminium lid is established on above-mentioned urceolus, and above-mentioned sensing element and above-mentioned aluminium lid butt, and above-mentioned outer spring housing is established on above-mentioned urceolus, and the one end and the above-mentioned urceolus butt of above-mentioned outer spring, the other end and above-mentioned base butt.

Preferably, the induction device further comprises a silicone pad for protecting the induction element, wherein the silicone pad is located between the aluminum cover and the induction element, and the silicone pad is abutted to the induction element. The silica gel pad plays a cushioning effect to induction element, and the protection induction element does not receive the damage.

Preferably, a stopper rod is provided at a bottom of the outer cylinder, a stopper hole corresponding to the stopper rod is provided in the base, the stopper rod is located in the stopper hole, and the outer cylinder is movable relative to the base in an axial direction of the outer cylinder. The limiting rod and the limiting hole are arranged, so that the outer barrel cannot rotate relative to the base.

On the other hand, the utility model also provides an electric rice cooker contains foretell empty pot detection device.

The utility model relates to a sensing mechanism, empty pot detection device and electric rice cooker have following beneficial effect: the winding posts are arranged on the inner barrel, so that the signal wire is connected with the external power supply after bypassing the signal wire, the winding posts play a role in supporting and fixing the signal wire, the stress of the signal wire at the joint of the signal wire and the conducting strip is reduced, and the stability of the signal wire is improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural view of the sensing mechanism of the present invention without the middle cylinder;

FIG. 2 is another schematic structural view of the sensing mechanism of the present invention with the middle cylinder removed;

fig. 3 is a sectional view of the sensing mechanism of the present invention with the spring in a normal state;

FIG. 4 is a cross-sectional view of the sensing mechanism of the present invention in a state where the spring is compressed by a force;

fig. 5 is an exploded view of the sensing mechanism of the present invention;

fig. 6 is a schematic structural view of the sensing mechanism of the present invention;

FIG. 7 is a schematic structural diagram of the conductive sheet of the present invention;

fig. 8 is a schematic structural view of the empty pot detection device of the present invention;

fig. 9 is an exploded view of the empty pot detection device of the present invention;

fig. 10 is a sectional view of the empty pot detecting device of the present invention;

FIG. 11 is an exploded view of the base and the outer barrel of the present invention;

fig. 12 is a schematic diagram of the working circuit of the sensing mechanism of the present invention.

In the drawings: 1-detection component, 11-induction element, 12-conducting strip, 121-vertical part, 122-horizontal part, 13-conducting column, 14-inner spring, 2-inner cylinder, 21-winding column, 22-placing groove, 23-first installing groove, 24-winding groove, 25-second installing groove, 3-signal line, 4-middle cylinder, 5-outer cylinder, 51-limiting rod, 6-aluminum cover, 7-outer spring, 8-silica gel pad, 9-base and 91-limiting hole.

The objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.

It should be noted that, if the present invention relates to a directional indication, the directional indication is only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture, and if the specific posture is changed, the directional indication is changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

As shown in fig. 1 to 7, a sensing mechanism includes:

the detection assembly 1 comprises two conducting strips 12 and two signal wires 3, wherein one conducting strip 12 is connected with one end of one signal wire 3, the other conducting strip 12 is connected with one end of the other signal wire 3, and the other ends of the two signal wires 3 are electrically connected with an external power supply;

and an inner cylinder 2, wherein a winding post 21 is arranged on the inner cylinder 2, the two conductive sheets 12 are not contacted with each other, and the signal wire 3 is electrically connected with the external power supply by bypassing the winding post 21.

Specifically, the two conducting strips 12 are respectively an anode conducting strip and a cathode conducting strip, the two signal lines 3 are respectively an anode signal line and a cathode signal line, the anode conducting strip is connected with the anode signal line, the cathode conducting strip is connected with the cathode signal line, and the anode signal line and the cathode signal line are respectively connected with the anode and the cathode of the external power supply, so as to form a current loop. The wrapping post 21 sets up the side at the outer wall of inner tube 2, conducting strip 12 mounted position, after two conducting strips 12 installed on inner tube 2, transversely draws forth signal line 3 and walks around wrapping post 21 and is connected with external power supply electricity again, plays the effect of supporting and fixed signal line 3, reduces the power that signal line 3 and conducting strip 12 junction received, avoids in use or installation, and signal line 3 atress drops from conducting strip 12. The number of the winding posts 21 is not limited, the number of the winding posts 21 can be set according to actual conditions, and in the embodiment, the number of the winding posts 21 is set to be two. When the signal wire 3 is long, 3, 4 or 5 wrapping posts 21 can be arranged, and the signal wire 3 is wound around the wrapping posts 21, so that the stress at the joint of the signal wire 3 and the conducting strip 12 is transferred to the contact position of the signal wire 3 and the wrapping posts 21, and the phenomenon that the signal wire 3 falls off from the conducting strip 12 is avoided.

Further, the detection assembly 1 further includes an inductive element 11, a conductive post 13, and an inner spring 14, wherein the inductive element 11 is mounted on the inner cylinder 2, the inductive element 11 is electrically connected to the two conductive pieces 12, one end of the inner spring 14 abuts against the conductive post 13, and the other end of the inner spring 14 abuts against the inner cylinder 2; when the inner spring 14 is not compressed, the conductive post 13 abuts against the two conductive plates 12.

Specifically, two ends of the inductive element 11 are connected to the positive conductive plate and the negative conductive plate respectively through two wires, thereby forming a current loop. Inductive element 11 is connected in parallel with conductive column 13. The conductive column 13 and the inner spring 14 form a control switch (the conductive column 13 and the conductive sheet 12 are in a switch closed state, and the conductive column 13 and the conductive sheet 12 are in a switch open state without contacting each other). When the inner spring 14 is in the original state (not expanded and not compressed), the conductive post 13 abuts against the two conductive plates 12. As shown in fig. 3, since the resistance of the sensing element 11 is much larger than that of the conductive posts 13, when the switch is closed, the current flows from the conductive posts 13 to form a current loop, so that the sensing element 11 is short-circuited. As shown in fig. 4, when the switch is turned off, the current can only flow from the inductive element 11 to form a current loop, and the inductive element 11 is activated. When the induction element 11 is activated, the state is a pot state, and when the induction element 11 is not activated, the state is a non-pot state, so that whether a pot body exists in the electric rice cooker is judged, and the dry burning condition is avoided. The sensing element 11 is used for detecting the state of the pan body. In this embodiment, the sensing element 11 is a thermistor, and the thermistor may be one of a negative temperature sparse thermistor (NTC), a positive temperature coefficient thermistor (PTC), or a TMR magnetoresistive sensor. The conductive column 13 and the inner spring 14 form a control switch, and compared with a magnetic reed switch and a microswitch, the switch has the advantages of simple structure and high temperature resistance.

Further, a placement groove 22 is formed in the inner cylinder 2, and the sensor element 11 is positioned in the placement groove 22.

Specifically, the placing groove 22 is formed in the upper surface of the inner cylinder 2, the sensing element 11 is located in the placing groove 22, and the highest point of the sensing element 11 does not exceed the upper surface of the inner cylinder 2. Ensure in the use, inductive element 11 is located standing groove 22 all the time, and inductive element 11 does not receive the collision, plays the effect of protection inductive element 11, finds inductive element 11's mounted position fast when making things convenient for the workman to install simultaneously, improves the installation effectiveness.

Further, a second mounting groove 25 is formed in the inner cylinder 2, the second mounting groove 25 is located at an end of the inner cylinder 2 away from the mounting groove 22, and the conductive post 13 and the inner spring 14 are both located in the second mounting groove 25.

Specifically, the size of second mounting groove 25 slightly is greater than the diameter that innerspring 14 and electrically conductive post 13, plays limiting displacement to innerspring 14 with electrically conductive post 13, prevents to lead the displacement that other directions take place in the in-process that electrically conductive post 13 reciprocated in second mounting groove 25, makes things convenient for workman's location installation innerspring 14 and electrically conductive post 13 simultaneously, improves the installation effectiveness.

Further, the inner cylinder 2 is further provided with a first mounting groove 23, the conductive sheet 12 includes a vertical portion 121 and a horizontal portion 122, one end of the vertical portion 121 is connected to one end of the horizontal portion 122, and the two are perpendicular to each other, the vertical portion 121 is located in the first mounting groove 23, and the horizontal portion 122 is located outside the first mounting groove 23, extends in the direction of the second mounting groove 25, and abuts against the conductive post 13.

As shown in fig. 5, the first mounting grooves 23 are disposed on the sidewall of the inner cylinder 2, the number of the first mounting grooves 23 is the same as that of the conductive strips 12, one conductive strip 12 is correspondingly mounted in one first mounting groove 23, and the two first mounting grooves 23 are disposed on diagonal positions of the inner cylinder 2, so that the distance between the positive conductive strip 12 and the negative conductive strip 12 is increased, and the insulation safety is improved.

As shown in fig. 7, the conductive plate 12 includes a vertical portion 121 and a horizontal portion 122, the vertical portion 121 and the horizontal portion 122 are integrally formed, the vertical portion 121 is inserted into the first mounting groove 23, the horizontal portion 122 is located outside the first mounting groove 23 and extends toward the second mounting groove 25 and abuts against the conductive post 13, and the vertical portion 121 is inserted into the first mounting groove 23, so that the conductive plate 12 is more stably mounted. The horizontal portion 122 contacts the conductive pillar 13 to form a current loop. The vertical part 121 and the horizontal part 122 are arranged, so that the heat dissipation area of the conductive sheet 12 and the contact area with the conductive column 13 are increased, and the reliability and the durability of product electric contact are improved. The winding post 21 is disposed at a side of the first mounting groove 23.

Further, the device also comprises a middle cylinder 4 for preventing the conductive column 13 from deviating when moving up and down, wherein the middle cylinder 4 is sleeved on the conductive column 13 and is abutted against the inner cylinder 2.

As shown in fig. 6, the middle cylinder 4 is sleeved on the conductive post 13, the middle cylinder 4 is matched with the inner cylinder 2, the conductive plate 12 is fixed on the inner cylinder 2, the conductive post 13 and the inner spring 14 are limited between the inner cylinder 2 and the middle cylinder 4, and the moving direction of the conductive post 13 is limited, so that the conductive post 13 can only move up and down, the conductive post 13 is limited from moving to other directions, and the stability of the switch is improved.

Further, the inner cylinder 2 is further provided with a winding groove 24, the winding post 21 is located in the winding groove 24, and the signal wire 3 is located in the winding groove 24.

As shown in fig. 1, the outer wall of the inner cylinder 2 is inwardly recessed to form a winding groove 24, the winding posts 21 are located in the winding groove 24, the volume of the inner cylinder 2 is reduced, when the signal wire 3 is fixed, the signal wire 3 is firstly placed into the winding groove 24, and the signal wire 3 bypasses the winding posts 21 to be connected with an external power supply, so that the signal wire 3 is further supported and fixed.

As shown in fig. 12, for the working circuit schematic diagram of the sensing mechanism of the present invention, when the conductive pillar 13 abuts against the two conductive pillars 12, the current flows through the positive conductive pillar, the conductive pillar 13 and the negative conductive pillar from the positive output of the power supply, and then returns to the negative pole of the power supply. When the conductive post 13 is not abutted to the two conductive pieces 12, the current is output from the positive electrode of the power supply, sequentially flows through the positive conductive piece, the sensing element 11 and the negative conductive piece, and then returns to the negative electrode of the power supply.

On the other hand, the utility model also provides an empty pot detection device, including foretell sensing mechanism, still include urceolus 5, aluminium lid 6, outer spring 7 and base 9, above-mentioned sensing mechanism is located above-mentioned urceolus 5, and above-mentioned aluminium lid 6 lid is established on above-mentioned urceolus 5, and above-mentioned inductive element 11 and above-mentioned aluminium lid 6 butt, and above-mentioned outer spring 7 cover is established on above-mentioned urceolus 5, and the one end of above-mentioned outer spring 7 and above-mentioned urceolus 5 butt, the other end and above-mentioned base 9 butt.

As shown in fig. 8 to 11, the outer cylinder 5 is sleeved with an outer spring 7, one end of the outer spring 7 abuts against the outer cylinder 5, the other end abuts against the base 9, the sensing mechanism is detachably installed in the outer cylinder 5, the sensing element 11 is located at one end of the outer cylinder 5 far away from the base 9, the conductive post 13 is located at one end of the outer cylinder 5 close to the base 9, when the outer spring 7 is in an original state (not extended and not compressed), the conductive post 13 is not in contact with the base 9, when the outer spring 7 is in a compressed state, the conductive post 13 abuts against the base 9, and the aluminum cover 6 covers one end of the outer cylinder 5 close to the sensing element 11 and abuts against the sensing element 11. When aluminium lid 6 and the contact of the pot body, outer spring 7 compresses, make and lead electrical pillar 13 and base 9 butt, it makes inner spring 14 compression to lead electrical pillar 13 atress, conducting pillar 12 and lead the disconnection between electrical pillar 13, the electric current flows through activation sensing element 11 from sensing element 11, thereby the perception reaches electric rice cooker and now for there being the pot state, make electric rice cooker begin to heat, aluminium lid 6 gives sensing element 11 with the heat transfer of the pot body, make sensing element 11 sense the temperature of the pot body, adjust the heating state of electric rice cooker to the pot body through the temperature of the sensing element 11 control pot body, avoid appearing the condition of high temperature or dry combustion method.

Further, the portable electronic device further comprises a silicone pad 8 for protecting the sensing element 11, wherein the silicone pad 8 is located between the aluminum cover 6 and the sensing element 11, and the silicone pad 8 is abutted against the sensing element 11.

Specifically, a silica gel pad 8 is arranged between the sensing element 11 and the aluminum cover 6, one end of the silica gel pad 8 is abutted to the sensing element 11, the other end of the silica gel pad 8 is abutted to the aluminum cover 6, and when the empty pot detection device is compressed under a stress or reset under a stress, the silica gel pad 8 has a buffering effect on the sensing element 11 and protects the sensing element 11 from being damaged. In other embodiments, the silicone pad 8 may replace a silicone sleeve that is sleeved outside the sensing element 11.

Further, a stopper rod 51 is provided at the bottom of the outer cylinder 5, a stopper hole 91 corresponding to the stopper rod 51 is formed in the base 9, the stopper rod 51 is positioned in the stopper hole 91, and the outer cylinder 5 is movable in the axial direction of the outer cylinder 5 with respect to the base 9.

As shown in fig. 11, the limiting rod 51 at the bottom of the outer cylinder 5 is inserted into the limiting hole 91 of the base 9, and the limiting rod 51 is provided, so that the outer cylinder 5 does not rotate relative to the base 9, and the limiting rod 51 is located in the limiting hole 91 no matter the outer spring 7 is in the original state, the compressed state or the extended state, and the number of the limiting rods 51 is not limited, and the number of the limiting rods 51 can be set according to actual situations. In this embodiment, three limiting rods 51 are provided, and three corresponding limiting holes 91 are provided. When the volume of the outer cylinder 5 is increased, the number of the limiting rods 51 can be increased correspondingly, such as 4 or 5. When the volume of the outer cylinder 5 is reduced, the number of the limiting rods 51, such as 1 or 2, may be reduced accordingly.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A sensing mechanism, comprising:

the detection assembly (1) comprises two conducting strips (12) and two signal wires (3), one conducting strip (12) is connected with one end of one signal wire (3) of the conducting strips, the other conducting strip (12) is connected with one end of the other signal wire (3), and the other ends of the two signal wires (3) are electrically connected with an external power supply;

inner tube (2), be equipped with wrapping post (21) on inner tube (2), two conducting strip (12) set up on inner tube (2), and two contactless between conducting strip (12), signal line (3) are walked around wrapping post (21) with external power supply electricity is connected.

2. A sensing mechanism according to claim 1, wherein the detecting assembly (1) further comprises an inductive element (11), a conductive column (13) and an inner spring (14), the inductive element (11) is mounted on the inner cylinder (2), the inductive element (11) is electrically connected to the two conductive sheets (12), one end of the inner spring (14) abuts against the conductive column (13), and the other end of the inner spring (14) abuts against the inner cylinder (2); when the inner spring (14) is not compressed, the conductive column (13) abuts against the two conductive sheets (12).

3. A sensing mechanism according to claim 2, wherein the inner barrel (2) is provided with a placement slot (22), and the sensing element (11) is located in the placement slot (22).

4. A sensing mechanism according to claim 3, wherein a second mounting groove (25) is formed in the inner cylinder (2), the second mounting groove (25) is located at an end of the inner cylinder (2) far away from the placing groove (22), and the conductive post (13) and the inner spring (14) are both located in the second mounting groove (25).

5. The sensing mechanism according to claim 4, wherein the inner barrel (2) further defines a first mounting groove (23), the conductive plate (12) includes a vertical portion (121) and a horizontal portion (122), one end of the vertical portion (121) is connected to one end of the horizontal portion (122) and the two are perpendicular to each other, the vertical portion (121) is disposed in the first mounting groove (23), and the horizontal portion (122) is disposed outside the first mounting groove (23), extends in the direction of the second mounting groove (25), and abuts against the conductive pillar (13).

6. The sensing mechanism according to claim 2, further comprising a middle cylinder (4) for preventing the conductive column (13) from shifting when moving up and down, wherein the middle cylinder (4) is sleeved on the conductive column (13) and abuts against the inner cylinder (2).

7. The sensing mechanism according to claim 1, wherein a winding slot (24) is further formed in the inner barrel (2), the winding post (21) is located in the winding slot (24), and the signal wire (3) is located in the winding slot (24).

8. An empty pot detection device, characterized in that, includes the sensing mechanism of any one of the above claims 2-6, and further includes an outer cylinder (5), an aluminum cover (6), an outer spring (7) and a base (9), the sensing mechanism is located in the outer cylinder (5), the aluminum cover (6) is covered on the outer cylinder (5), and the sensing element (11) is abutted against the aluminum cover (6), the outer spring (7) is sleeved on the outer cylinder (5), and one end of the outer spring (7) is abutted against the outer cylinder (5), and the other end is abutted against the base (9).

9. An empty pot detection device according to claim 8, further comprising a silicone pad (8) for protecting the induction element (11), wherein the silicone pad (8) is located between the aluminum cover (6) and the induction element (11), and the silicone pad (8) is abutted against the induction element (11).

10. The empty pot detection device according to claim 8, wherein a limiting rod (51) is arranged at the bottom of the outer cylinder (5), a limiting hole (91) corresponding to the limiting rod (51) is formed in the base (9), the limiting rod (51) is located in the limiting hole (91), and the outer cylinder (5) can move along the axial direction of the outer cylinder (5) relative to the base (9).

11. An electric rice cooker characterized by comprising the empty pot detection device of any one of claims 8 to 10.