CN110558854B

CN110558854B - Alarm device, lid and cooking utensil

Info

Publication number: CN110558854B
Application number: CN201910837505.6A
Authority: CN
Inventors: 李技献
Original assignee: Individual
Current assignee: Individual
Priority date: 2019-07-30
Filing date: 2019-09-05
Publication date: 2021-07-02
Anticipated expiration: 2039-09-05
Also published as: CN112956895A; JP2021039745A; CN110558854A; JP6950052B2

Abstract

The invention discloses an alarm device, a cover body and a cooking appliance, wherein the alarm device comprises a temperature sensor (10) and an alarm (20), the temperature sensor (10) comprises a bimetallic strip (12) which can deform when the sensed temperature reaches a set value, the alarm (20) comprises an alarm unit (21), and the alarm unit (21) is configured to alarm when the bimetallic strip (12) deforms. The alarm device can give an alarm when the water temperature reaches a set value, so that an operator can be far away from a cooking utensil, and the water temperature or the boiling state of water can be strictly controlled.

Description

Alarm device, lid and cooking utensil

Technical Field

The invention relates to the technical field of cooking, in particular to an alarm device, a cover body and a cooking appliance.

Background

When delicate cooking is carried out, the temperature or boiling state of water in a cooking appliance needs to be strictly controlled, so that cooked food has good taste and flavor. However, the main method for judging the water temperature or boiling state in the cooking appliance is to open the lid of the cooking appliance for direct observation or to directly observe the water temperature inside the cooking appliance through a transparent lid, which brings about inevitable problems: an operator needs to observe the water temperature inside the cooking appliance irregularly and repeatedly, so that the operator cannot be far away from the cooking appliance, and cannot directly observe the inside of the cooking appliance when cooking is carried out by using some special cooking appliances (such as a pressure cooker), so that the water temperature or the boiling state of water cannot be accurately judged.

Disclosure of Invention

The invention aims to overcome the problems in the prior art and provides an alarm device, a cover body and a cooking appliance, wherein the alarm device can give an alarm when the water temperature reaches a set value, so that an operator can be far away from the cooking appliance, and the water temperature or the boiling state of the water can still be strictly controlled.

In order to achieve the above object, an aspect of the present invention provides an alarm device, which includes a temperature sensor and an alarm, wherein the temperature sensor includes a bimetal which can deform when a sensed temperature reaches a set value, and the alarm includes an alarm unit, wherein the alarm unit is configured to alarm when the bimetal deforms.

Optionally, the alarm unit is configured to alarm when the bimetal is deformed by being impacted; the temperature sensor includes a driving unit; the bimetal plate has a first surface and a second surface which are oppositely arranged, the driving unit is connected to the second surface, and the bimetal plate is configured to: when the temperature reaches the set value, the initial state of the first surface bulge can be converted into the trigger state of the second surface bulge, so that the second surface is driven to push the driving unit to move to impact the alarm unit; preferably, the alarm comprises a housing having a locating location, the alarm unit being configured to: can be set in the positioning position and can be separated from the positioning position under the impact of the driving unit to alarm; preferably, the seat body is provided with a through hole, the driving unit is a rod, and one end of the driving unit can penetrate through the through hole to impact the alarm unit; the alarm unit comprises a bell, the seat body is provided with a concave surface for limiting the positioning position, a part of the bell can be matched with the concave surface, and the through hole is positioned on the concave surface.

Optionally, the driving unit has a magnet, and the seat body is provided with an iron block capable of attracting the magnet to limit the movement of the driving unit after the driving unit impacts the alarm unit; preferably, the driving unit includes a reset piece operable from the outside to disengage the magnet from the iron block; preferably, the alarm unit is connected to the seat body through a flexible member.

Optionally, the alarm unit includes a mechanical timing unit configured to: the timing alarm device can start timing by being impacted when the bimetallic strip deforms, and control the alarm unit to give an alarm after the preset time.

Optionally, the alarm unit includes an alarm circuit and a trigger switch for controlling on/off of the alarm circuit, and the trigger switch can be driven by the bimetal to close when the bimetal deforms so as to trigger the alarm unit to alarm; the temperature sensor includes a driving unit; the bimetal plate has a first surface and a second surface which are oppositely arranged, the driving unit is connected to the second surface, and the bimetal plate is configured to: when the temperature reaches the set value, the initial state of the first surface protrusion can be converted into the trigger state of the second surface protrusion, so that the second surface is driven to push the driving unit to move to control the trigger switch to be closed.

Optionally, the drive unit has a magnet configured to: the trigger switch can be attracted to be closed to trigger an alarm when the driving unit is pushed to an attraction position by the second surface; preferably, the alarm device comprises an iron block capable of being attracted by the magnet, and the iron block is arranged at the attraction position so that the magnet is kept at the attraction position after attracting the trigger switch; preferably, the drive unit includes a reset member operable from outside to disengage the magnet from the attraction position.

Optionally, the alarm unit includes an electronic timing unit and an alarm unit, and the electronic timing unit is configured to be started when the trigger switch is turned off and control the alarm unit to alarm when a preset time elapses; preferably, the alarm unit is integrally arranged in a sealing manner.

The invention provides a cover body, which comprises a cover body and the alarm device, wherein the alarm device is arranged on the cover body.

Optionally, the cover body includes a holding part disposed on the cover body, and the alarm device is mounted on the holding part.

Optionally, the alarm is provided with an anti-overflow circuit, an anti-overflow device and a buzzer unit, the anti-overflow device is arranged on the cover body and is electrically connected with the buzzer unit through the anti-overflow circuit, and the anti-overflow device is configured to control the buzzer unit to alarm when contacting liquid; preferably, the temperature sensor is configured to be able to detect a temperature of the cover body.

The invention also provides a cooking appliance, which comprises a cooking appliance main body and the cover body, wherein the cooking appliance main body is provided with an opening capable of being covered by the cover body.

Through the technical scheme, when the temperature reaches the set value, the bimetallic strip of the temperature sensor deforms, and the alarm unit can give an alarm when the bimetallic strip deforms. Therefore, regardless of whether the operator is close or far from the alarm device, when the alarm unit alarms, the operator can be informed of the alarm and act in time.

Drawings

FIG. 1 is a schematic structural view of one embodiment of a cover of the present invention;

FIG. 2 is a schematic view of the alarm device of FIG. 1 without the drive unit impacting the alarm unit;

FIG. 3 is a schematic view of the alarm device of FIG. 1 after a drive unit of the alarm device has struck the alarm unit;

FIG. 4 is a schematic diagram of the temperature sensor of FIG. 1;

fig. 5 is a schematic view of the driving unit and the bimetal of fig. 4 cooperating with each other;

FIG. 6 is a schematic structural view of another embodiment of a cover of the present invention;

FIG. 7 is a schematic view of the alarm device of FIG. 6 in a disengaged position;

FIG. 8 is a schematic view of the alarm device of FIG. 6 in an operational position;

FIG. 9 is a schematic view of the alarm device of FIG. 6 when the alarm is triggered;

FIG. 10 is a schematic diagram of the temperature sensor of FIG. 6;

fig. 11 is a schematic view showing a structure in which the driving unit and the bimetal of fig. 10 are engaged.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

The alarm device of the present invention can be classified into two types, i.e., a mechanical alarm and an electronic alarm, according to different structures of the alarm unit 21 of the alarm device 20, and the specific structural forms of the mechanical alarm and the electronic alarm will be described below.

First, the alarm unit 21 and the alarm device using the mechanical alarm structure will be explained.

As shown in fig. 1 to 5, the alarm device of the present invention includes a temperature sensor 10 and an alarm 20, wherein the temperature sensor 10 includes a bimetal 12 that can deform when a sensed temperature reaches a set value, the alarm 20 includes an alarm unit 21, and the alarm unit 21 can give an alarm by being impacted when the bimetal 12 deforms.

In the present invention, when the temperature reaches a set value, the bimetal of the temperature sensor is deformed, and the alarm unit 21 can give an alarm by being bumped when the bimetal 12 is deformed. Therefore, regardless of whether the distance between the operator and the alarm device is close or far, when the alarm unit 21 gives an alarm, the operator can be informed of the alarm and act in time.

It will be appreciated that there are a number of possible connections between the alarm unit 21 and the bimetal 12, so that the alarm unit 21 will be struck to alarm when the bimetal 12 is deformed. For example, the alarm unit 21 may be a hard metal member spaced apart from the bimetal 12, and when the bimetal 12 deforms, the bimetal 12 directly impacts the alarm unit 21 to vibrate the hard metal member to generate an audible alarm. The present invention also provides another class of embodiments in which the bimetal 12 does not directly contact the alarm unit 21 but strikes the alarm unit 21 by driving the movement of one of the moving members. Specifically, the temperature sensor 10 includes a driving unit 11; the bimetal 12 has a first surface 121 and a second surface 122 which are oppositely arranged, the driving unit 11 is connected to the second surface 122, and the bimetal 12 is configured to: when the temperature reaches the set value, the initial state that the first surface 121 is convex can be converted into the trigger state that the second surface 122 is convex, so that the second surface 122 is driven to push the driving unit 11 to move to impact the alarm unit 21. The principle of such an arrangement is: when the bimetal 12 deforms, the protrusion of the second surface 122 displaces the driving unit 11 connected thereto, and the displaced driving unit 11 impacts the alarm unit 21. In this arrangement, the trigger switch 211 and the bimetal 12 can be spaced apart from each other by a predetermined distance, and when one of the temperature sensor 10 and the alarm 20 needs to be inspected, repaired or replaced, the influence on the other can be reduced as much as possible.

It should be understood that the alarm unit 21 may be triggered by impact, for example, the bimetal 12 directly impacts on the alarm unit 21 to vibrate the hard metal piece to generate an audible alarm, but of course, the alarm is triggered by the bimetal 12 being deformed rapidly, and if the bimetal 12 is deformed slowly, the alarm unit 21 cannot be triggered by contact with the alarm unit 21. In order to achieve the purpose of enabling the alarm unit 21 to give an alarm no matter the speed of deformation of the bimetal 12 is fast or slow, optionally, the alarm 20 includes a seat 22 having a positioning position, and the alarm unit 21 is configured to: can be set in the locating position and be set out of the locating position to alarm upon impact by the drive unit 11. That is, the alarm unit 21 generates an alarm not due to the impact of the driving unit 11 but after the alarm unit 21 is out of the positioning position, so that the alarm unit 21 can generate an alarm no matter the speed of the deformation of the bimetal 12 is fast or slow.

The alarm unit 21 can adopt various different structures to realize the function of making a sound during moving, for example, the alarm unit 21 can be a metal block, the seat body 22 can be provided with a metal piece with a cavity below the positioning position of the seat body, when the alarm unit 21 is separated from the positioning position, the metal piece can be dropped downwards, and the alarm unit 21 drops on the metal piece to impact the metal piece, so that the metal piece can make a sound to give an alarm. In one embodiment of the present invention, in order to more rapidly generate the audible alarm, the alarm unit 21 may alternatively include a bell, the seat body 22 may have a concave surface defining a location position, a portion of the bell may be fitted to the concave surface, and the through hole may be formed on the concave surface.

Of course, there are also many ways of positioning the alarm unit 21 relative to the drive unit 11, for example, the drive unit 11 may hit the alarm unit 21 horizontally. In an embodiment of the present invention, optionally, the seat body 22 has a through hole, the positioning position is located above the through hole, the driving unit 11 is a rod and is disposed below the seat body 22, and one end of the driving unit 11 can pass through the through hole upward to hit the alarm unit 21.

In order to ensure that the end of the driving unit 11 is out of the positioning position as far as possible after extending out of the through hole of the seat body 22, optionally, the driving unit 11 is provided with a magnet 111, the seat body 22 is provided with an iron block 30, and the iron block 30 can attract the magnet 111 after the driving unit 11 hits the alarm unit 21 to limit the movement of the driving unit 11. That is, after one end of the driving unit 11 extends out of the through hole of the seat 22 and hits the alarm unit 21, the magnet 111 on the driving unit 11 is attracted to the iron block 30 of the seat 22, so that the end of the driving unit 11 extending out of the through hole of the seat 22 is kept in an extended state, and the alarm unit 21 cannot stay at the positioning position. Of course, one end of the driving unit 11 may also be kept in the extended state in other manners, for example, the driving unit 11 may be reset after the movement is limited by a limiting member, so that one end of the driving unit 11 is kept in the extended state, and other similar manners are not described in this disclosure.

In order to conveniently reset the alarm unit 21 to the positioning position after the alarm unit 21 is separated from the positioning position to give an alarm, optionally, the alarm unit 21 is connected to the seat body 22 through a flexible member, as shown in fig. 3, the flexible member may be a rope in the figure, one end of the rope is fixedly arranged on the seat body 22, and the other end of the rope is fixedly connected with the bell, so that the bell can also stay within a controllable range under the limitation of the rope after the bell is separated from the positioning position, thereby facilitating the resetting.

Of course, when the driving unit 11 needs to be reset, it is usually necessary to separate the magnet 111 from the iron block 30, and in order to conveniently operate the magnet 111, as shown in fig. 4, the driving unit 11 may optionally include a reset member 112 that can be operated from the outside to separate the magnet 111 from the attraction position. In the embodiment shown in fig. 4, the driving unit 11 is a first rod, the magnet 111 is disposed in the middle of the first rod to expose the end of the first rod, the reset member 112 is a second rod vertically disposed on the first rod, one end of the second rod extends to a position convenient to operate along the horizontal direction in fig. 4 (in the embodiment where the alarm device is disposed in the holding member of the cover, one end of the second rod may extend to the outside of the holding member to facilitate the operation of the operator), and the operator may move the first rod by shifting the second rod, so that the magnet 111 is separated from the iron block 30.

In some cases, the alarm unit 21 does not need to trigger the alarm immediately when the temperature reaches the set value, but the alarm unit 21 needs to trigger the alarm at a certain time after the temperature reaches the set value, and for achieving the purpose, the invention further provides an embodiment, in which the alarm unit 21 comprises a mechanical timing unit configured to start timing by being impacted when the bimetal 12 is deformed and control the alarm unit 21 to alarm by being impacted when a preset time elapses. It should be understood that the mechanical timing unit can adopt various forms as long as it can control the alarm unit 21 to alarm when the preset time passes, for example, the alarm unit 21 can adopt the structure of a mechanical alarm clock, the mechanical timing unit can be set to be a clockwork spring structure capable of setting the preset time of the mechanical alarm clock, after the preset time is set, the bimetallic strip 12 deforms and strikes the clockwork spring switch of the clockwork spring structure, so that the mechanical alarm clock starts to time, and when the time is timed to the preset time, the mechanical alarm clock rings. Of course, the mechanical timing unit and the alarm unit 21 may also be in other forms similar to a mechanical alarm clock, and the invention is not limited thereto.

The alarm device of the present invention can be applied to various occasions, for example, the alarm device can be arranged on a cover body of a cooking appliance so as to detect the temperature in the cooking appliance, therefore, as shown in fig. 1, the present invention also provides a cover body, the cover body comprises a cover body 40 and the alarm device, and the alarm device is arranged on the cover body 40.

It should be understood that the position where the temperature sensor 10 is provided at the cover body 40 is not limited as long as it can detect the temperature, and for example, the temperature sensor 10 may be provided at an edge position of the cover body 40. In one embodiment of the present invention, in order to utilize the structural space of the cover body as much as possible and make the cover body as beautiful as possible, optionally, the temperature sensor 10 is disposed on the grip 50 of the cover body 40, as shown in fig. 1, the temperature sensor 10 may be partially disposed inside the grip 50, and the bimetal 12 for detecting temperature is disposed outside the grip 50 to facilitate the detection of temperature, so that the reasonable utilization of the structural space of the cover body can be realized.

In order to prevent liquid from overflowing out of the cooking utensil in time when the cooking utensil to which the lid of the present invention is applied is used for cooking easily spilled liquid (such as milk and porridge), the alarm 20 is optionally provided with an overflow prevention circuit, an overflow prevention device 60 and a buzzer unit, the overflow prevention device 60 is arranged on the lid body 40 and electrically connected with the overflow prevention circuit, and the overflow prevention device 60 is configured to be able to conduct the overflow prevention circuit to make the buzzer unit alarm when contacting with the liquid. In one embodiment of the present invention, the overflow preventing device 60 includes two metal contacts having a small distance therebetween, the overflow preventing device 60 extends into the cooking utensil for a certain distance, when the liquid in the cooking utensil overflows upwards, the liquid will contact the overflow preventing device 60 first, the two metal contacts are electrically conducted under the action of the liquid, so as to conduct the overflow preventing circuit and trigger the buzzer unit to alarm, and the operator can act in time after hearing the alarm to prevent the liquid from overflowing the cooking utensil.

In one embodiment of the present invention, the cover body 40 has an outer side protruding outward and an inner side opposite to the outer side, the grip 50 is disposed on the outer side of the cover body 40, and the bimetal 12 of the temperature sensor 10 is disposed on the inner side of the cover body 40, since the inner side of the cover body 40 faces the inside of the cooking appliance when the lid is used in the cooking appliance, the bimetal 12 disposed on the inner side of the cover body 40 can more directly detect the temperature inside the cooking appliance. Of course, the bimetal 12 may be located outside the cap body 40 or inside the cap body 40 (i.e. embedded in the cap body 40, so as to be able to detect the temperature of the cap body 40), and in some embodiments, the bimetal 12 may be disposed inside the threaded connection member 13 capable of conducting heat, and the threaded connection member 13 may be threaded with the grip 50 through the mounting hole of the cap body 40. Of course, the threaded connector 13 may also be embedded in the cap body 40 so that it does not protrude outside of the cap body 40 nor inside of the cap body 40 for aesthetic reasons.

As shown in fig. 4, the temperature sensor 10 of the alarm device of the present invention can be installed on different covers as a component, the upper portion of the threaded connector 13 of the temperature sensor 10 has a threaded structure, the lower portion of the threaded connector is disc-shaped, and the inside of the disc-shaped structure has a mounting cavity for accommodating the bimetal 12, the upper threaded structure of the threaded connector 13 is integrally connected with the lower disc-shaped structure, the upper portion of the threaded structure is open and has a channel capable of accommodating the rod-shaped driving unit 11, the channel is communicated with the mounting cavity of the disc-shaped structure, so that the rod-shaped driving unit 11 can extend into the mounting cavity of the disc-shaped structure from the upper opening of the threaded structure of the threaded connector 13, and the rod-shaped driving unit 11 can contact with the second surface 122 of the bimetal 12. The temperature sensor 10 with such a structure uses the combination of the driving unit 11, the bimetallic strip 12 and the threaded connecting piece 13 as an integral structure, can be conveniently disassembled and assembled with the cover body, and can also be suitable for different cover bodies, thereby greatly improving the convenience and simultaneously reducing the use and maintenance costs.

The concrete structure and use of the cover of the present invention will be explained below by taking as an example an embodiment in which the alarm unit 21 includes a bell.

The cover body has a cover body 40, the cover body 40 has an outer side protruding outward and an inner side opposite to the outer side, a mounting hole is provided on the cover body 40, the bimetal 12 is disposed in a cavity of the threaded connection member 13 and embedded in the cover body 40, the threaded connection member 13 can conduct heat to the bimetal 12, and the threaded connection member 13 passes through the mounting hole of the cover body 40 and is in threaded connection with the holding member 50. The holding member 50 has a cavity, the cavity of the threaded connector 13 is communicated with the cavity of the holding member 50, one end of the rod-shaped driving unit 11 extends into the cavity of the threaded connector 13 to be connected with the second surface 122 of the bimetal 12, and the other end of the rod-shaped driving unit 11 extends into the cavity of the holding member 50. A rod-shaped reset piece 112 is vertically arranged on the rod-shaped driving unit 11, and one end of the reset piece 112 passes through a long hole formed on the holding piece 50 and extends out of the holding piece 50. The alarm unit 21 includes a bell, and a seat body 22 made of metal is provided on the grip 50 and has a concave surface defining a positioning position, the concave surface being provided with a through hole communicating with the cavity of the grip 50.

When in operation, the bell is arranged on the concave surface and is positioned above the through hole. Since the bimetal 12 is embedded in the cover body 40, the threaded connection 13 can transfer the temperature heat of the cover body 40 to the bimetal 12, when the temperature of the cover body 40 reaches a set value, the bimetal 12 is converted from an initial state to a triggered state, the second surface 122 of the bimetal 12 protrudes and pushes the driving unit 11, the driving unit 11 moves towards the seat body 22 under the push of the second surface 122 and passes through the through hole, the driving unit 11 passing through the through hole impacts the bell to make the bell sound as a first alarm, the bell falls from the concave surface due to the impact, and the bell impacts the metal seat body 22 to make the sound as a second alarm again. In the present embodiment, since the alarm 20 can give an alarm twice, it is more effective to remind the operator to control cooking in time.

In addition, when the liquid in the cooking utensil overflows upwards, the liquid can contact the anti-overflow device 60 firstly, the two metal contacts are conducted under the action of the liquid, so that the anti-overflow circuit is conducted to trigger the buzzer unit to give an alarm, and an operator can act in time after hearing the alarm to prevent the liquid from overflowing the cooking utensil.

Because the anti-overflow circuit and the alarm 20 are arranged relatively independently, the operation of the buzzer unit and the operation of the alarm 20 are not affected.

The following explains the alarm unit 21 and the alarm device using an electronic alarm.

As shown in fig. 6 to 11, the alarm device of the present invention includes a temperature sensor 10 and an alarm 20, the temperature sensor 10 includes a bimetal 12 that can deform when the sensed temperature reaches a set value, an alarm unit 21 of the alarm 20 includes an alarm circuit and a trigger switch 211 for controlling the on/off of the alarm circuit, and the trigger switch 211 can be driven by the bimetal 12 to close to trigger the alarm unit 21 to alarm when the bimetal 12 deforms.

In the invention, when the temperature reaches a set value, the bimetal 12 of the temperature sensor 10 deforms, the deformation of the bimetal 12 drives the trigger switch 211 of the alarm unit 21 to close, and the closing of the trigger switch 211 can conduct the alarm circuit of the alarm unit 21 so as to trigger the alarm. Regardless of whether the operator is close or far from the alarm device, when the alarm unit 21 gives an alarm, the operator can be informed of the alarm and can act in time.

It should be understood that when the bimetal 12 deforms, it can drive the trigger switch 211 to close in various ways, for example, the trigger switch 211 is two terminals of the alarm circuit, wherein one terminal of the trigger switch 211 is normally connected to the bimetal 12, and when the bimetal 12 deforms, a part of the bimetal 12 can contact with the other terminal of the trigger switch 211 (the bimetal 12 can be regarded as a switch), so as to turn on the whole alarm circuit (embodiment 1). The present invention also provides another class of embodiments, in which the bimetal 12 is not directly contacted with the trigger switch 211, but drives the trigger switch 211 to close by driving a moving member to move, and specifically, the temperature sensor 10 includes a driving unit 11; the bimetal 12 has a first surface 121 and a second surface 122 which are oppositely arranged, the driving unit 11 is connected to the second surface 122, and the bimetal 12 is configured to: when the temperature reaches the set value, the initial state that the first surface 121 protrudes can be converted into the trigger state that the second surface 122 protrudes, so that the second surface 122 is driven to push the driving unit 11 to move to control the trigger switch 211 to be closed. The principle of such an arrangement is: when the bimetal 12 deforms, the protrusion of the second surface 122 displaces the driving unit 11 connected thereto, and the displaced driving unit 11 drives the trigger switch 211 to close. In this arrangement, the trigger switch 211 and the bimetal 12 can be spaced apart from each other by a predetermined distance, and when one of the temperature sensor 10 and the alarm 20 needs to be inspected, repaired or replaced, the influence on the other can be reduced as much as possible.

It should be understood that there are many embodiments in which the movement of the driving unit 11 brings the trigger switch 211 to close, for example, the alarm 20 has a button that can be operated from the outside thereof, the button is provided corresponding to the trigger switch 211, and when the driving unit 11 moves in the direction of the trigger switch 211 and pushes the button, the button closes the trigger switch 211 to trigger the alarm (example 2). In order to enable the driving unit 11 to control the operation of the trigger switch 211 more conveniently, the present invention further provides another embodiment, specifically, as shown in fig. 8 and 9, the driving unit 11 has a magnet 111, and the magnet 111 is configured to: the attraction trigger switch 211 can be closed to trigger an alarm when the drive unit 11 is pushed to the attraction position by the second surface 122. That is, when the driving unit 11 moves to the attracting position in the direction of the trigger switch 211, the magnet 111 on the driving unit 11 attracts the trigger switch 211 to change its state, so that the trigger switch 211 is closed, and with this arrangement, when the magnet 111 is always in the attracting position, the attraction of the magnet 111 can keep the trigger switch 211 in the closed state, and when the magnet 111 leaves the attracting position, the trigger switch 211 is not attracted by the magnet 111 and returns to the open state, so that the convenience of the operation of the trigger switch 211 is greatly improved. It should be noted that the above embodiment defaults to the trigger switch 211 being normally in the open state, so that the attraction of the magnet 111 can change the trigger switch 211 to the closed state, while the attraction of the magnet 111 can also change the trigger switch 211 to the open state if the trigger switch 211 is normally in the closed state.

In the above embodiment, in order to keep the trigger switch 211 in the closed state, it is necessary to keep the magnet 111 in the attraction position, and therefore, alternatively, the alarm device includes the iron block 30 capable of being attracted by the magnet 111, and the iron block 30 is disposed in the attraction position so that the magnet 111 attracts the trigger switch 211 and then is kept in the attraction position. Of course, the magnet 111 may be maintained at the attraction position in other manners, for example, the driving unit 11 may be reset after the movement is limited by a limiting member, so that the magnet 111 is maintained at the attraction position, and other similar manners are not described in this disclosure.

Of course, when the trigger switch 211 needs to be turned off, the magnet 111 needs to be moved away from the attraction position in general, and in order to conveniently operate the magnet 111, as shown in fig. 9, the driving unit 11 may alternatively include a reset member 112 that can be operated from the outside to move the magnet 111 away from the attraction position. In the embodiment shown in fig. 9, the driving unit 11 is a first rod, the magnet 111 is disposed at one end of the first rod, the reset member 112 is a second rod vertically disposed on the first rod, one end of the second rod extends to a position where the operation can be facilitated along the horizontal direction in fig. 9 (in the embodiment where the alarm device is disposed in the grip of the cover, one end of the second rod can extend to the outside of the grip so as to facilitate the operation of the operator), and the operator can move the first rod by shifting the second rod, so that the magnet 111 is separated from the attraction position.

In some cases, it may not be necessary for the alarm unit 21 to issue an alarm, and therefore, in order to be able to make the closure of the trigger switch 211 not trigger an alarm when the temperature reaches a set value, optionally, the alarm unit 21 has a master switch connected in series with the trigger switch 211 and able to be operated from the outside. The alarm circuit of the alarm unit 21 can be in an off state as long as the main switch is turned off in advance, and the alarm circuit is not turned on even if the trigger switch 211 is turned on, so that an alarm is not issued.

In some cases, the alarm unit 21 does not need to trigger the alarm immediately when the temperature reaches the set value, but the alarm unit 21 needs to trigger the alarm at a certain time after the temperature reaches the set value, and for this purpose, the alarm unit 21 optionally includes an electronic timing unit configured to be activated when the trigger switch 211 is closed and to control the alarm element to alarm when a preset time elapses. That is, the trigger switch 211, the electronic timing unit and the alarm element are connected in series, the electronic timing unit can only be triggered to operate when the trigger switch 211 is closed, and the electronic timing unit controls the alarm element to alarm when the electronic timing unit times for a preset time. The electronic timing unit can be a timing control chip integrating a controller and a timer, and the alarm element can be a buzzer, a warning lamp, a combination of the buzzer and the warning lamp or other alarm devices.

In order to prevent electronic components (such as an alarm circuit, an electronic timing unit, an alarm element, etc.) inside the alarm unit 21 from being affected by water inflow and high temperature during use, and improve the stability of use and the service life, optionally, the alarm unit 21 is integrally sealed, and the sealing is performed by integrating the electronic components of the alarm unit 21 into a whole and by controlling the sound transmission that does not affect the alarm element.

The alarm device of the present invention can be applied to various occasions, for example, it can be installed on the cover body of the cooking utensil to detect the temperature in the cooking utensil, therefore, as shown in fig. 6, the present invention also provides a cover body, the cover body includes a cover body 40 and the above alarm device, the alarm device is installed on the cover body 40.

In order to prevent liquid from overflowing out of the cooking utensil in time when the cooking utensil to which the lid of the present invention is applied is used for cooking easily spilled liquid (such as milk and porridge), optionally, the alarm 20 is provided with an overflow prevention circuit connected in parallel with the trigger switch 211, the lid includes an overflow prevention device 60 disposed on the lid body 40 and electrically connected to the overflow prevention circuit, and the overflow prevention device 60 is configured to conduct the overflow prevention circuit to alarm the alarm 20 when liquid is contacted. In one embodiment of the present invention, the overflow preventing device 60 includes two metal contacts having a small distance therebetween, the overflow preventing device 60 extends into the cooking utensil for a certain distance, when the liquid in the cooking utensil overflows upwards, the liquid will contact the overflow preventing device 60 first, the two metal contacts are electrically conducted under the action of the liquid, so as to conduct the overflow preventing circuit, and the overflow preventing circuit is connected in parallel with the trigger switch 211, so that the alarm 20 can be directly triggered to alarm once the overflow preventing circuit is conducted, and the operator can act in time after hearing the alarm, so as to prevent the liquid from overflowing the cooking utensil.

In the above embodiments, the alarm 20 is fixedly disposed on the cover, when the cover is cleaned, the cleaning water is easily splashed onto the alarm 20 to cause adverse effects on the alarm 20, and for this reason, a special waterproof seal needs to be made for the alarm 20, but this will certainly increase the manufacturing cost and the process difficulty of the alarm 20. Therefore, in order to reduce the requirement of the alarm device 20 for waterproofness without affecting the cleaning operation of the lid body, the present invention also provides an embodiment (example 3) in which the temperature sensor 10 of the alarm device is provided on the lid body 40, and the alarm device 20 is detachably connected to the temperature sensor 10 so as to be movable between an operating position in which the trigger switch 211 of the alarm device 20 can be driven to close by the bimetal 12 and a separated position. Specifically, the deformation of the bimetal 12 drives the driving unit 11 to move toward the trigger switch 211, and when the driving unit 11 moves to the attraction position, the magnet 111 on the driving unit 11 attracts the trigger switch 211 to change the state, so that the trigger switch 211 is closed. Since the closing and opening operations of the trigger switch 211 are performed by the attractive force of the magnet 111, the driving unit 11 does not directly contact the trigger switch 211, and the magnet 111 may generate an attractive force to the trigger switch 211 through the outer case of the alarm 20 to control the operation of the trigger switch 211, in this embodiment, the alarm 20 and the temperature sensor 10 may be separated from each other, and when a temperature needs to be detected, the alarm 20 is placed at an operating position where the trigger switch 211 of the alarm 20 corresponds to the magnet 111 of the temperature sensor 10 to be attracted and closed by the magnet 111, and when the cover needs to be cleaned, the alarm 20 may be directly detached, so that the cover may be conveniently cleaned regardless of the waterproof property of the alarm 20.

It should be understood that the position where the temperature sensor 10 is provided at the cover body 40 is not limited as long as it can detect the temperature, and for example, the temperature sensor 10 may be provided at an edge position of the cover body 40. In one embodiment of the present invention, in order to utilize the structural space of the cover body as much as possible and make the cover body as beautiful as possible, optionally, the temperature sensor 10 is disposed on the grip 50 of the cover body 40, as shown in fig. 6, the temperature sensor 10 may be partially disposed inside the grip 50, and the bimetal 12 for detecting temperature is disposed outside the grip 50 to facilitate the detection of temperature, so that the reasonable utilization of the structural space of the cover body can be realized.

In the above embodiment, since the alarm 20 is detachably connected to the temperature sensor 10, when the alarm 20 needs to be placed at the working position, in order to achieve quick and accurate positioning (after the alarm 20 is placed at the working position, the trigger switch 211 of the alarm just corresponds to the magnet 111), optionally, the holding piece 50 is provided with a positioning piece capable of positioning the alarm 20 at the working position, and the positioning piece may be in various forms.

In one embodiment of the present invention, the cover body 40 has an outer side protruding outward and an inner side opposite to the outer side, the grip 50 is disposed on the outer side of the cover body 40, and the bimetal 12 of the temperature sensor 10 is disposed on the inner side of the cover body 40, since the inner side of the cover body 40 faces the inside of the cooking appliance when the lid is used in the cooking appliance, the bimetal 12 disposed on the inner side of the cover body 40 can more directly detect the temperature inside the cooking appliance. Of course, the bimetal 12 may be located outside the cap body 40 or inside the cap body 40 (i.e., embedded in the cap body 40 so as to be able to detect the temperature of the cap body 40), and in the embodiment described below, since the bimetal 12 is disposed inside the heat-conductive threaded connector 13, the threaded connector 13 may be embedded in the cap body 40 so as not to protrude outside the cap body 40 nor inside the cap body 40.

As shown in fig. 10, the temperature sensor 10 of the alarm device of the present invention can be installed on different covers as a component, the upper portion of the threaded connector 13 of the temperature sensor 10 has a threaded structure, the lower portion of the threaded connector is disc-shaped, and the inside of the disc-shaped structure has a mounting cavity for accommodating the bimetal 12, the upper threaded structure of the threaded connector 13 is integrally connected with the lower disc-shaped structure, the upper portion of the threaded structure is open and has a channel capable of accommodating the rod-shaped driving unit 11, the channel is communicated with the mounting cavity of the disc-shaped structure, so that the rod-shaped driving unit 11 can extend into the mounting cavity of the disc-shaped structure from the upper opening of the threaded structure of the threaded connector 13, and the rod-shaped driving unit 11 can contact with the second surface 122 of the bimetal 12. The temperature sensor 10 with such a structure uses the combination of the driving unit 11, the bimetallic strip 12 and the threaded connecting piece 13 as an integral structure, can be conveniently disassembled and assembled with the cover body, and can also be suitable for different cover bodies, thereby greatly improving the convenience and simultaneously reducing the use and maintenance costs.

Various embodiments of the lid of the present invention will be explained below with reference to examples.

Embodiment 1, the cover body has a cover body 40, the cover body 40 has an outer side protruding outward and an inner side opposite to the outer side, the cover body 40 is provided with a mounting hole, the bimetal 12 is disposed in the cavity of the threaded connection member 13 and located at the inner side of the cover body 40, the threaded connection member 13 can conduct heat to the bimetal 12, the threaded connection member 13 is threaded with the grip member 50 through the mounting hole of the cover body 40, the trigger switches 211 of the alarm unit 21 are two endpoints of the alarm circuit disconnection, wherein one end point of the trigger switch 211 extends into the cavity of the threaded connecting piece 13 to be fixedly connected with the bimetallic strip 12, the other end point of the trigger switch 211 extends into the cavity of the threaded connecting piece 13 and keeps a gap with the second surface 122 of the bimetallic strip 12, the electronic timing unit and the alarm element are connected in series in the alarm circuit, the alarm device 20 is provided with a control panel capable of adjusting the preset time of the electronic timer unit. The overflow preventing circuit is connected in parallel with the trigger switch 211, and the overflow preventing device 60 electrically connected with the overflow preventing circuit is disposed inside the cap body 40. In addition, the alarm unit 21 has a main switch connected in series with the trigger switch 211.

In operation, the preset time of the electronic timing unit is set through the control panel, the preset time is N seconds (N is a number not less than 0), and then the main switch is turned on. Since the bimetal 12 is disposed inside the cover body 40, the threaded connection 13 can transfer the temperature heat of the steam to the bimetal 12, when the temperature of the steam reaches a set value, the bimetal 12 is converted from an initial state to a trigger state, the second surface 122 of the bimetal 12 protrudes and contacts with the other end point of the trigger switch 211, and the two end points of the trigger switch 211 are electrically connected through the bimetal 12, so that the alarm circuit is turned on. When the alarm circuit is conducted, the electronic timing unit is triggered to start timing, and when the preset time passes, the electronic timing unit controls the alarm element to alarm.

When the liquid in the cooking utensil overflows upwards, the liquid contacts the overflow preventing device 60 first, and the two metal contacts are conducted under the action of the liquid, so that the overflow preventing circuit is conducted to trigger the alarm 20.

Since the anti-overflow circuit is connected in parallel with the trigger switch 211, the alarm 20 informs the operator whether the steam temperature reaches the set value or the liquid in the cooking appliance overflows upward.

Embodiment 2, the lid body has a lid body 40, the lid body 40 has an outer side protruding outward and an inner side opposite to the outer side, the lid body 40 is provided with a mounting hole, the bimetal 12 is disposed in a cavity of the threaded connector 13 and embedded in the lid body 40, the threaded connector 13 can conduct heat to the bimetal 12, and the threaded connector 13 is threaded with the holding member 50 through the mounting hole of the lid body 40. The holding member 50 has a cavity, the cavity of the threaded connector 13 is communicated with the cavity of the holding member 50, one end of the rod-shaped driving unit 11 extends into the cavity of the threaded connector 13 to be connected with the second surface 122 of the bimetal 12, and the other end of the rod-shaped driving unit 11 extends into the cavity of the holding member 50. A rod-shaped reset piece 112 is vertically arranged on the rod-shaped driving unit 11, and one end of the reset piece 112 passes through a long hole formed on the holding piece 50 and extends out of the holding piece 50. The alarm 20 has a button provided in correspondence with the trigger switch 211, which button extends into the chamber of the grip 50 and in correspondence with the other end of the drive unit 11. The trigger switch 211, the electronic timing unit and the alarm element are connected in series in the alarm circuit, and the alarm 20 is provided with a control panel capable of adjusting the preset time of the electronic timing unit. The overflow preventing circuit is connected in parallel with the trigger switch 211, and the overflow preventing device 60 electrically connected with the overflow preventing circuit is disposed inside the cap body 40. In addition, the alarm unit 21 has a main switch connected in series with the trigger switch 211.

In operation, the preset time of the electronic timing unit is set through the control panel, the preset time is N seconds (N is a number not less than 0), and then the main switch is turned on. Because the bimetal 12 is embedded in the cover body 40, the threaded connection member 13 can transfer the temperature heat of the cover body 40 to the bimetal 12, when the temperature of the cover body 40 reaches a set value, the bimetal 12 is converted from an initial state to a trigger state, the second surface 122 of the bimetal 12 protrudes and pushes the driving unit 11, the driving unit 11 moves towards the button of the alarm 20 under the pushing of the second surface 122 and finally pushes the button, and the button closes the trigger switch 211 so as to conduct the alarm circuit. When the alarm circuit is conducted, the electronic timing unit is triggered to start timing, and when the preset time passes, the electronic timing unit controls the alarm element to alarm.

Since the anti-overflow circuit is connected in parallel with the trigger switch 211, the alarm 20 informs the operator whether the temperature of the cover body 40 reaches the set value or the liquid in the cooking appliance overflows upward.

Embodiment 3, the lid body has a lid body 40, the lid body 40 has an outer side protruding outward and an inner side opposite to the outer side, the lid body 40 is provided with a mounting hole, the bimetal 12 is disposed in the cavity of the threaded connector 13 and located on the inner side of the lid body 40, the threaded connector 13 can conduct heat to the bimetal 12, and the threaded connector 13 is threaded with the holding member 50 through the mounting hole of the lid body 40. The holding member 50 has a cavity, the cavity of the threaded connection member 13 is communicated with the cavity of the holding member 50, one end of the rod-shaped driving unit 11 extends into the cavity of the threaded connection member 13 to be connected with the second surface 122 of the bimetal 12, the other end of the rod-shaped driving unit 11 is provided with a magnet 111, and the housing of the holding member 50 is provided with an iron block 30 arranged at an interval with the magnet 111. A rod-shaped reset piece 112 is vertically arranged on the rod-shaped driving unit 11, and one end of the reset piece 112 passes through a long hole formed on the holding piece 50 and extends out of the holding piece 50. In addition, the holding piece 50 is provided with a groove for positioning the alarm 20, and a first magnetic piece is arranged in the groove.

The alarm 20 has an outer shell, the trigger switch 211, the electronic timing unit and the alarm element are arranged in series in the outer shell of the alarm 20, and the normal state of the trigger switch 211 is an off state. The alarm 20 is provided with a protrusion corresponding to the groove of the holding part 50, and the protrusion is provided with a second magnetic part capable of attracting the first magnetic part. The alarm device 20 is provided with a control panel capable of adjusting the preset time of the electronic timer unit. In addition, the alarm unit 21 has a main switch connected in series with the trigger switch 211.

In operation, the control panel is used to set the preset time of the electronic timing unit, the preset time is N seconds (N is a number not less than 0), then the main switch is turned on, the alarm 20 is positioned at the working position through the protrusion on the outer shell and the holding piece 50, and at this time, the trigger switch 211 just corresponds to the magnet 111. Because the bimetallic strip 12 is arranged on the inner side of the cover body 40, the threaded connection piece 13 can transfer the temperature heat of the steam to the bimetallic strip 12, when the temperature of the steam reaches a set value, the bimetallic strip 12 is converted into a trigger state from an initial state, the second surface 122 of the bimetallic strip 12 protrudes and pushes the driving unit 11, the driving unit 11 moves towards the alarm 20 under the pushing of the second surface 122, the magnet 111 generates attraction when approaching the iron block 30, the magnet 111 continuously moves towards the iron block 30 and is finally adsorbed on the iron block 30, at this time, the magnetic force of the magnet 111 can penetrate through the iron block 30 and the outer shell of the alarm 20 to generate attraction to the trigger switch 211, the trigger switch 211 is attracted to a closed state, and the alarm circuit is switched on. When the alarm circuit is conducted, the electronic timing unit is triggered to start timing, and when the preset time passes, the electronic timing unit controls the alarm element to alarm.

In the present embodiment, since the alarm device 20 is not always fixed to the lid body 40, if it is necessary to connect the overflow preventing circuit in parallel with the trigger switch 211, a buzzer unit separate from the alarm device 20 may be provided on the lid body 40, and the overflow preventing device 60 may be electrically connected to the buzzer unit through the overflow preventing circuit and provided inside the lid body 40. When the liquid in the cooking utensil overflows upwards, the liquid can contact the overflow preventing device 60 firstly, and the two metal contacts are conducted under the action of the liquid, so that the overflow preventing circuit is conducted to trigger the buzzer unit.

Since the anti-overflow circuit is connected in parallel with the trigger switch 211, the operation of the alarm 20 and the operation of the buzzer unit are not affected by each other.

Embodiment 4, the lid body has a lid body 40, the lid body 40 has an outer side protruding outward and an inner side opposite to the outer side, the lid body 40 is provided with a mounting hole, the bimetal 12 is disposed in the cavity of the threaded connector 13 and located on the inner side of the lid body 40, the threaded connector 13 can conduct heat to the bimetal 12, and the threaded connector 13 is threaded with the holding member 50 through the mounting hole of the lid body 40. The alarm device 20 includes a wireless receiving system provided in the grip 50, the wireless receiving system including an alarm element and being provided separately from the wireless transmitting system, and therefore, the wireless receiving system can be remote from the cover. The wireless transmission system comprises a trigger switch 211, the trigger switch 211 is two end points of the disconnection of the alarm circuit, wherein one end point of the trigger switch 211 extends into the cavity of the threaded connecting piece 13 to be fixedly connected with the bimetallic strip 12, the other end point of the trigger switch 211 extends into the cavity of the threaded connecting piece 13 to keep a gap with the second surface 122 of the bimetallic strip 12, and an electronic timing unit and the trigger switch 211 are connected in series in the wireless transmission system. The grip 50 is provided with a control panel capable of adjusting a preset time of the electronic timer unit. The overflow preventing circuit and the trigger switch 211 are connected in parallel in the wireless transmission system, and the overflow preventing device 60 electrically connected with the overflow preventing circuit is provided inside the cap body 40. In addition, the alarm 20 has a main switch connected in series with the trigger switch 211.

In operation, the preset time of the electronic timing unit is set through the control panel, the preset time is N seconds (N is a number not less than 0), and then the main switch is turned on. Since the bimetal 12 is disposed inside the cover body 40, the threaded connection 13 can transfer the temperature heat of the steam to the bimetal 12, when the temperature of the steam reaches a set value, the bimetal 12 is converted from an initial state to a trigger state, the second surface 122 of the bimetal 12 protrudes and contacts with the other end point of the trigger switch 211, and the two end points of the trigger switch 211 are electrically connected through the bimetal 12, so that the alarm circuit is turned on. When the alarm circuit is switched on, the electronic timing unit is triggered to start timing, when the preset time passes, the wireless transmitting system transmits an alarm signal to the wireless receiving system, and the wireless receiving system controls the alarm element to alarm after receiving the alarm signal.

When the liquid in the cooking utensil overflows upwards, the liquid contacts the overflow preventing device 60 first, and the two metal contacts are electrically conducted under the action of the liquid, so that the overflow preventing circuit is conducted to control the wireless transmitting system to transmit an alarm signal to the wireless receiving system, and the wireless receiving system controls the alarm element to alarm after receiving the alarm signal.

Since the anti-overflow circuit is connected in parallel with the trigger switch 211, the alarm element will notify the operator whether the steam temperature reaches the set value or the liquid in the cooking appliance overflows upward.

In this embodiment, the wireless receiving system can be arranged at a place far away from the cooking utensil and even far away from the kitchen, so that the influence of high temperature and oil pollution is reduced, and the timely temperature obtaining or anti-overflow alarm of an operator is not influenced.

The invention also provides a cooking appliance, such as an autoclave, a milk boiler and the like, which comprises a cooking appliance main body and the cover body, wherein the cooking appliance main body is provided with an opening capable of being covered by the cover body.

The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited thereto. Within the scope of the technical idea of the invention, many simple modifications may be made to the technical solution of the invention, and in order to avoid unnecessary repetition, various possible combinations of the invention will not be described further. Such simple modifications and combinations should be considered within the scope of the present disclosure as well.

Claims

1. An alarm device, characterized in that the alarm device comprises a temperature sensor (10) and an alarm (20), the temperature sensor (10) comprises a bimetallic strip (12) which can deform when the sensed temperature reaches a set value, the alarm (20) comprises an alarm unit (21), wherein the alarm unit (21) is configured to alarm when the bimetallic strip (12) deforms;

the alarm unit (21) comprises an alarm circuit and a trigger switch (211) used for controlling the on-off of the alarm circuit, and the trigger switch (211) can be driven by the bimetallic strip (12) to be closed when the bimetallic strip (12) deforms so as to trigger the alarm unit (21) to alarm;

the temperature sensor (10) comprises a drive unit (11); the bimetal (12) has a first surface (121) and a second surface (122) which are oppositely arranged, the driving unit (11) is connected to the second surface (122), and the bimetal (12) is configured to: when the temperature reaches the set value, the initial state that the first surface (121) is convex can be converted into the trigger state that the second surface (122) is convex, so that the second surface (122) is driven to push the driving unit (11) to move to control the trigger switch (211) to be closed;

the drive unit (11) has a magnet (111), the magnet (111) being configured to: when the driving unit (11) is pushed to the attraction position by the second surface (122), the trigger switch (211) can be attracted to be closed to trigger an alarm, so that the temperature sensor (10) and the alarm (20) can be arranged in a mutually separated mode.

2. The alarm device according to claim 1, characterized in that it comprises an iron block (30) that can be attracted by the magnet (111), the iron block (30) being arranged in the attraction position so that the magnet (111) remains in the attraction position after attracting the trigger switch (211).

3. The alarm device according to claim 2, characterised in that the drive unit (11) comprises a reset element (112) which can be operated from the outside to disengage the magnet (111) from the attraction position.

4. The alarm device according to claim 1, characterised in that the alarm unit (21) comprises an electronic timing unit and an alarm element, the electronic timing unit being configured so as to be able to be activated when the trigger switch (211) is closed and to control the alarm element to alarm when a preset time has elapsed.

5. The warning device according to claim 1, characterized in that the warning unit (21) is entirely of a sealed arrangement.

6. A cover body is characterized in that a cover body is provided,

the cover comprises a cover body (40) and the alarm device of any one of claims 1-5, which is arranged on the cover body (40).

7. A cover according to claim 6, characterized in that it comprises a grip (50) arranged on the cover body (40), said alarm (20) comprising a wireless receiving system and a wireless transmitting system, said wireless transmitting system being arranged in said grip (50), said wireless receiving system comprising an alarm element and said wireless receiving system being arranged separately from said wireless transmitting system.

8. The cover body according to claim 6, wherein the alarm (20) is provided with an anti-overflow circuit, an anti-overflow device (60) and a buzzer unit, the anti-overflow device (60) is arranged on the cover body (40) and is electrically connected with the buzzer unit through the anti-overflow circuit, and the anti-overflow device (60) is configured to control the buzzer unit to alarm when liquid is contacted.

9. Cover according to claim 6, characterized in that the temperature sensor (10) is configured to be able to detect the temperature of the cover body (40).

10. A cooking appliance comprising a cooking appliance body having an opening closable by a cover as claimed in any of claims 6 to 9 and the cover.