CN109238482B - Large-current empty pot detection and dry burning prevention sensor - Google Patents
Large-current empty pot detection and dry burning prevention sensor Download PDFInfo
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- CN109238482B CN109238482B CN201811135809.XA CN201811135809A CN109238482B CN 109238482 B CN109238482 B CN 109238482B CN 201811135809 A CN201811135809 A CN 201811135809A CN 109238482 B CN109238482 B CN 109238482B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K1/00—Details of thermometers not specially adapted for particular types of thermometer
- G01K1/02—Means for indicating or recording specially adapted for thermometers
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
- G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
- G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K2207/00—Application of thermometers in household appliances
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- General Physics & Mathematics (AREA)
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Abstract
A high-current empty pot detection and dry burning prevention sensor comprises an aluminum cover, a fixed seat, a small cup, an L-shaped support rod, a spring and a base; the top of the fixed seat is provided with a fuse and a thermistor, the left side of the fixed seat is provided with a movable magnet capable of moving left and right, and the right side of the fixed seat is provided with a fixed magnet; an elastic part for driving the contact and a static contact piece with a static contact are arranged outside the movable magnet, one end of the elastic part is fixed on the fixed seat and is connected with one end of the fuse and one end of the thermistor, and one end of the static contact piece is fixed on the fixed seat and is connected with the other end of the thermistor; the fixing seat is arranged in the small cup, the small cup is matched and connected with the aluminum cover, and the bottom of the small cup is provided with a square hole suitable for the support rod to be inserted; the spring is respectively abutted with the small cup and the base, when the spring is compressed, the support rod is positioned between the movable magnet and the fixed magnet, the movable contact is separated from the fixed contact, and the elastic piece is abutted with the movable magnet; the bottom of the small cup is provided with a supporting rod, the base is correspondingly provided with a through hole suitable for the supporting rod to pass through, and the small cup can vertically move relative to the base.
Description
Technical Field
The invention relates to the technical field of household appliances, in particular to a high-current empty pot detection and dry burning prevention sensor.
Background
The heating circuit of the traditional electric cooker is mainly composed of a temperature sensing soft magnet and a permanent magnet. The temperature sensing soft magnet is fixed with the heating surface, heat at the bottom of the inner pot is directly transferred to the temperature sensing soft magnet through the heating surface, when the temperature is lower than 192 ℃, the temperature sensing soft magnet and the permanent magnet have magnetism, and when the temperature is higher than 192 ℃, the temperature sensing soft magnet suddenly loses magnetism.
In the temperature controller structure that uses on products such as common electric rice cooker, electric pressure cooker, fuse and thermistor pass through fixed plate and interior fixed plate to be fixed on the gland, and the gland is fixed on outer cup, and outer cup passes through the jack catch and is fixed with the outer pot of rice cooker, and the gland reciprocates through outer spring, guarantees to paste closely with the interior pot of product, realizes temperature-sensing and overheat protection.
However, the existing electric cooker adopts a singlechip as a control circuit, a thermistor is used for providing temperature information of a cooker body for the singlechip, and the singlechip can stop heating of a heating disc after the temperature of the cooker body exceeds a preset temperature, so that a traditional push switch, a corresponding transmission rod, a soft magnet and the like are abandoned. However, if the pan body is taken out under a specific condition, the single chip microcomputer cannot automatically detect that the pan body leaves the heating plate, so that dry burning is likely to occur, energy is wasted, and fire is very likely to happen.
It is seen that improvements and enhancements to the prior art are needed.
Disclosure of Invention
In view of the defects of the prior art, the invention aims to provide a high-current empty pot detection and dry burning prevention sensor which is unique in structure and reasonable in design, can perform no-load detection and detect whether a pot body leaves a heating plate or not so as to prevent the dry burning phenomenon.
In order to achieve the purpose, the invention adopts the following technical scheme:
a high-current empty pot detection and dry burning prevention sensor comprises an aluminum cover, a fixed seat, a small cup, an L-shaped supporting rod, a spring and a base; the top of the fixed seat is provided with a fuse and a thermistor, the left side of the fixed seat is provided with a movable magnet, the movable magnet can move left and right relative to the fixed seat, and the right side of the fixed seat is provided with a fixed magnet; an elastic part for driving the contact and a static contact piece with a static contact are arranged outside the movable magnet, one end of the elastic part is fixed on the fixed seat and is connected with one end of the fuse and one end of the thermistor, and one end of the static contact piece is fixed on the fixed seat and is connected with the other end of the thermistor; the fixing seat is arranged in the small cup, the small cup is connected with the aluminum cover in a matching way, and the bottom of the small cup is provided with a square hole suitable for inserting the L-shaped supporting rod; the top of the spring abuts against the bottom of the small cup, the bottom of the spring abuts against the base, the L-shaped supporting rod is located in the spring, when the spring is compressed, the top of the L-shaped supporting rod is located between the movable magnet and the fixed magnet, a movable contact of the elastic piece is separated from a static contact of the static contact, and the elastic piece abuts against the outer side face of the movable magnet; the L-shaped supporting rod is fixed on the base, at least three supporting rods are arranged at the bottom of the small cup, through holes suitable for the supporting rods to penetrate through are correspondingly formed in the base, and the small cup can vertically move relative to the base.
In the high-current empty pot detection and dry burning prevention sensor, the fuse is sleeved with a fuse sleeve.
In the high-current empty pot detection and dry burning prevention sensor, the thermistor sleeve is sleeved with the thermistor sleeve.
In the high-current empty pot detection and dry burning prevention sensor, a U-shaped first plastic push rod is arranged outside the fixed magnet, and the first plastic push rod is fixed on the fixed seat in a buckling manner; the U-shaped second plastic push rod is arranged on the outer side of the movable magnet, and the second plastic push rod is connected to the fixed seat in a buckling mode and can move left and right relative to the fixed seat.
In the high-current empty pot detection and dry burning prevention sensor, the elastic piece comprises a movable contact spring and an elastic sheet; the movable contact spring is L-shaped, the bottom of the movable contact spring is fixedly connected with the rear part of the elastic sheet, and the elastic sheet is abutted against the outer side surface of the second plastic push rod.
In the high-current empty pot detection and dry burning prevention sensor, the fixed seat is respectively provided with a first nail hole suitable for the first rivet to penetrate through the movable contact piece and to be inserted into, and a second nail hole suitable for the second rivet to penetrate through the fixed contact piece and to be inserted into.
In the high-current empty pot detection and dry burning prevention sensor, the aluminum cover is connected with the small cup in a buckling mode.
Has the advantages that:
the invention provides a large-current empty pot detection and dry burning prevention sensor with temperature sensing, overheating protection and inner pot sensing functions, wherein the no-load detection sensor is provided with a movable magnet, a fixed magnet and an L-shaped supporting rod, when the empty pot detection sensor is placed in a pot body, an aluminum cover and a small cup are pushed to move downwards, the L-shaped supporting rod is driven to be inserted into the small cup, so that the L-shaped supporting rod is placed between the movable magnet and the fixed magnet, the movable magnet cannot move outwards due to the repulsion force of the fixed magnet but moves inwards under the action force of an elastic sheet and the attraction force generated on the supporting rod, and as the elastic sheet swings inwards, a movable contact is separated from a static contact, and finally a main circuit of an electric cooker is connected through a thermistor to form a loop; when the pot body is taken out, the arranged spring jacks up the small cup to enable the L-shaped support rod to be separated from the small cup, then the movable magnet and the fixed magnet repel each other, the movable magnet moves outwards to push the elastic sheet to swing outwards to enable the movable contact and the fixed contact to be contacted, and finally the current of the main circuit of the electric cooker flows through the movable contact and the fixed contact; the special structural design realizes the technical purpose of inner pot induction and avoids the dry burning phenomenon of the electric cooker. In addition, the thermistor is used for detecting real-time temperature so as to realize temperature induction of the electric cooker. The fuse is connected in series with the elastic element and is connected in the main circuit together, when the fuse is fused due to overhigh temperature, the main circuit is in a broken circuit state, and the electric cooker is protected.
Drawings
Fig. 1 is a perspective assembly view of a high-current empty pot detection and dry burning prevention sensor provided by the invention.
Fig. 2 is a working sectional view of the large current empty pot detection and dry burning prevention sensor provided by the invention when a spring is compressed.
Fig. 3 is a working schematic diagram of the high-current empty pot detection and dry burning prevention sensor power-on provided by the invention.
Fig. 4 is a working schematic diagram of the power failure of the high-current empty pot detection and dry burning prevention sensor provided by the invention.
Fig. 5 is a schematic diagram of a working circuit of the high-current empty pot detection and dry burning prevention sensor provided by the invention.
Detailed Description
The invention provides a high-current empty pot detection and dry burning prevention sensor, which is further described in detail below by referring to the attached drawings and embodiments in order to make the purpose, technical scheme and effect of the invention clearer and clearer. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Referring to fig. 1, fig. 2, fig. 3, fig. 4, and fig. 5, the present invention provides a high current empty pot detection and dry burning prevention sensor, which includes an aluminum cover 1, a fixing base 2, a small cup 3, an L-shaped supporting rod 4, a spring 5, and a base 6; the top of the fixed seat 2 is provided with a fuse 7 and a thermistor 8, the fixed seat 2 is made of plastic, the left side of the fixed seat 2 is provided with a movable magnet 21, the movable magnet 21 can move left and right relative to the fixed seat 2, and the right side of the fixed seat 2 is provided with a fixed magnet 22; an elastic part for driving the contact 28 and a static contact piece 25 with a static contact 29 are arranged outside the movable magnet 21, one end of the elastic part is fixed on the fixed seat 2 and is connected with one end of the fuse 7 and one end of the thermistor 8, and one end of the static contact piece 25 is fixed on the fixed seat 2 and is connected with the other end of the thermistor 8; the fixed seat 2 is arranged in the small cup 3, the small cup 3 is connected with the aluminum cover 1 in a matching way, and the bottom of the small cup 3 is provided with a square hole suitable for inserting the L-shaped supporting rod 4; the top of the spring 5 is abutted against the bottom of the small cup 3, the bottom of the spring 5 is abutted against the base 6, the L-shaped support rod 4 is positioned in the spring 5, when the spring 5 is compressed due to the gravity of putting the pot body into the pot body, the top of the L-shaped support rod 4 is positioned between the movable magnet 21 and the fixed magnet 22, the movable contact 28 of the elastic piece is separated from the static contact 29 of the static contact 25, and the elastic piece is abutted against the outer side surface of the movable magnet 21; the L-shaped supporting rod 4 is fixed on the base 6, at least three supporting rods 31 are arranged at the bottom of the small cup 3, through holes 61 suitable for the supporting rods 31 to penetrate through are correspondingly arranged on the base 6, and the small cup 3 can vertically move relative to the base 6.
The elastic piece and the static contact piece form a control switch. As shown in fig. 5, one end of the fuse is connected to one end of the thermistor and one end of the elastic element, the other end of the thermistor is connected to one end of the static contact and is communicated with one end of the main circuit, and the other end of the fuse is communicated with the other end of the main circuit. When the pot body is put into the pot body, the spring is compressed due to the gravity of the pot body, the L-shaped support rod is inserted into and positioned between the movable magnet and the fixed magnet, and the movable contact is separated from the fixed contact at the moment, so that the current of the main circuit is conducted through the fuse and the thermistor; when the pot body is taken out, the L-shaped supporting rod is separated from the small cup due to the restoration of the spring, the movable magnet moves due to mutual repulsion with the fixed magnet and pushes the elastic piece to move outwards, so that the movable contact is in contact with the fixed contact, and the current of the main circuit is conducted through the fuse, the movable contact and the fixed contact. The thermistor 8 is used for real-time temperature detection, and the fuse plays roles of overheating fusing and circuit protection. The supporting rod 31 at the bottom of the small cup 3 is inserted into the through hole 61 arranged on the base 6, the small cup 3 cannot rotate relative to the base through the arrangement of the supporting rod 31, and the supporting rod is still inserted into the through hole 61 when the spring is restored (not stretched and not compressed). In addition, the supporting rod can be clamped on the base, so that the small cup is prevented from being separated from the base due to the elasticity of the spring. Of course, for the arrangement of the spring 5, the bottom of the spring 5 may abut against the top of the base 6, the top of the spring 5 abuts against the bottom of the aluminum cover 1, and the small cup 3 is placed in the space surrounded by the spring 5; since the aluminum cover 1 is connected with the small cup 3, the aluminum cover is jacked up together with the small cup by the elasticity of the spring.
Specifically, the fuse 7 is fitted with a fuse bushing 71. The fuse is an electric appliance which fuses a melt by heat generated by itself to open a circuit when a current exceeds a predetermined value. The fuse melts the melt by the heat generated by the fuse after the current exceeds a specified value for a period of time, so that the circuit is disconnected.
Specifically, the thermistor 8 is sheathed with a thermistor bushing 81. The thermistor is a negative temperature sparse thermistor (NTC), the resistance value is lower when the temperature is higher, and the thermistor has the characteristics of high sensitivity, wide working temperature range, small volume, convenience in use, good stability and strong overload capacity.
Specifically, as shown in fig. 1 and fig. 2, a U-shaped first plastic push rod 27 is disposed outside the fixed magnet 22, and the first plastic push rod 27 is fastened and fixed to the fixed seat 2; a U-shaped second plastic push rod 26 is arranged outside the movable magnet 21, and the second plastic push rod 26 is connected to the fixed seat 2 in a buckling mode and can move left and right relative to the fixed seat 2. First plastics push rod 27, second plastics push rod 26 all adopt plastics to make, like this, just can not produce the magnetic force to fixed magnet, activity magnet, and in addition, first plastics push rod 27, second plastics push rod 26 are connected with fixing base 2 buckle respectively, are convenient for install and dismantle. Through the steady right side that is fixed in fixing base 2 of first plastics push rod 27 with fixed magnet 22, install movable magnet in the left side of fixing base 2 through second plastics push rod 26 to, second plastics push rod 26 can remove about, just so can remove about for movable magnet provides sufficient space.
Specifically, as shown in fig. 1, the elastic member includes a movable contact piece 23 and an elastic piece 24; the movable contact piece 23 and the static contact piece 25 are both L-shaped, the bottom of the movable contact piece 23 is fixedly connected with the rear part of the elastic piece 24, the movable contact piece 23 and the elastic piece 24 are fixed through a copper rivet, and the elastic piece 24 is abutted with the outer side surface of the second plastic push rod 26.
Specifically, the fixed seat 2 is respectively provided with a first nail hole suitable for the first rivet 91 to pass through and be inserted into the circular hole of the movable contact piece 23, and a second nail hole suitable for the second rivet 92 to pass through and be inserted into the circular hole of the fixed contact piece 25, and the movable contact piece 23 and the fixed contact piece 25 are respectively and stably fixed to the fixed seat 2 by using the first rivet 91 and the second rivet 92.
Specifically, the aluminum lid 1 is snap-connected with the small cup 3. Besides, the aluminum cover and the small cup can be fixed in a rotary clamping connection mode, and quick installation and disassembly are achieved.
The working principle is as follows: the elastic piece driving the contact and the static contact piece with the static contact form a control switch. As shown in fig. 2, 3 and 5, after the pot body is placed in the pot body, the pot body on the aluminum cover presses down the empty load detection sensor, the small cup compresses the spring, so that the L-shaped support rod is inserted into the small cup, the top of the L-shaped support rod is positioned between the movable magnet and the fixed magnet, under the action of the elastic force of the elastic sheet and the attraction force of the movable magnet to the L-shaped support rod (the attraction force is greater than the repulsion force of the fixed magnet to the movable magnet), the movable magnet moves rightwards, the movable contact is separated from the static contact, the current of the main circuit is conducted through the thermistor, the temperature testing effect is achieved, and if the temperature exceeds the temperature of the fuse, the fuse is disconnected, and the overtemperature protection; as shown in fig. 2, 4 and 5, after the pan body is taken out and the pressure of the pan body on the no-load detection sensor disappears, the spring jacks up the small cup to enable the L-shaped supporting rod to be separated from the inside of the small cup, and due to the fact that repulsive force exists between the fixed magnet and the movable magnet, the repulsive force is larger than the elastic force of the elastic sheet, the movable magnet is driven to move to enable the actuating contact to be in contact with the static contact, and the current of the main circuit flows through the movable contact and the static contact; whether the electric cooker has no load or not and whether the cooker body leaves the heating plate or not are judged through the sensor.
In summary, the present invention provides a large current empty pot detection and dry burning prevention sensor with temperature sensing, overheat protection and inner pot sensing functions, wherein the no-load detection sensor is provided with a movable magnet, a fixed magnet and an L-shaped support rod, when the empty pot detection sensor is placed into a pot body, an aluminum cover and a small cup are pushed to move downwards, the L-shaped support rod is driven to be inserted into the small cup, so that the L-shaped support rod is placed between the movable magnet and the fixed magnet, because the L-shaped support rod is arranged between the movable magnet and the fixed magnet, the movable magnet cannot move outwards due to the repulsion force of the fixed magnet, but moves inwards due to the acting force of a spring plate and the attraction force generated on the support rod, because the spring plate swings inwards, a movable contact is separated from a stationary contact, and finally a main circuit of an electric rice cooker is connected; when the pot body is taken out, the arranged spring jacks up the small cup to enable the L-shaped support rod to be separated from the small cup, then the movable magnet and the fixed magnet repel each other, the movable magnet moves outwards to push the elastic sheet to swing outwards to enable the movable contact and the fixed contact to be contacted, and finally the current of the main circuit of the electric cooker flows through the movable contact and the fixed contact; the special structural design realizes the technical purpose of inner pot induction and avoids the dry burning phenomenon of the electric cooker. In addition, the thermistor is used for detecting real-time temperature so as to realize temperature induction of the electric cooker. The fuse is connected in series with the elastic element and is connected in the main circuit together, when the fuse is fused due to overhigh temperature, the main circuit is in a broken circuit state, and the electric cooker is protected.
It should be understood that equivalents and modifications of the technical solution and inventive concept thereof may occur to those skilled in the art, and all such modifications and alterations should fall within the scope of the appended claims.
Claims (7)
1. A large-current empty pot detection and dry burning prevention sensor is characterized by comprising an aluminum cover, a fixed seat, a small cup, an L-shaped supporting rod, a spring and a base; the top of the fixed seat is provided with a fuse and a thermistor, the left side of the fixed seat is provided with a movable magnet, the movable magnet can move left and right relative to the fixed seat, and the right side of the fixed seat is provided with a fixed magnet; an elastic part for driving the contact and a static contact piece with a static contact are arranged outside the movable magnet, one end of the elastic part is fixed on the fixed seat and is connected with one end of the fuse and one end of the thermistor, and one end of the static contact piece is fixed on the fixed seat and is connected with the other end of the thermistor; the fixing seat is arranged in the small cup, the small cup is connected with the aluminum cover in a matching way, and the bottom of the small cup is provided with a square hole suitable for inserting the L-shaped supporting rod; the top of the spring abuts against the bottom of the small cup, the bottom of the spring abuts against the base, the L-shaped supporting rod is located in the spring, when the spring is compressed, the top of the L-shaped supporting rod is located between the movable magnet and the fixed magnet, a movable contact of the elastic piece is separated from a static contact of the static contact, and the elastic piece abuts against the outer side face of the movable magnet; the L-shaped supporting rod is fixed on the base, at least three supporting rods are arranged at the bottom of the small cup, through holes suitable for the supporting rods to penetrate through are correspondingly formed in the base, and the small cup can vertically move relative to the base.
2. The high current empty pot detection and dry burning prevention sensor according to claim 1, wherein the fuse sheath is provided with a fuse bushing.
3. The high current empty pot detection and dry burning prevention sensor according to claim 1, wherein the thermistor sleeve is provided with a thermistor sleeve.
4. The high-current empty pot detection and dry burning prevention sensor according to claim 1, wherein a U-shaped first plastic push rod is arranged outside the fixed magnet, and the first plastic push rod is fastened and fixed on the fixed seat; the U-shaped second plastic push rod is arranged on the outer side of the movable magnet, and the second plastic push rod is connected to the fixed seat in a buckling mode and can move left and right relative to the fixed seat.
5. The high current empty pot detection and dry burning prevention sensor according to claim 4, wherein the elastic member comprises a movable contact piece and a spring piece; the movable contact spring is L-shaped, the bottom of the movable contact spring is fixedly connected with the rear part of the elastic sheet, and the elastic sheet is abutted against the outer side surface of the second plastic push rod.
6. A high-current empty pot detection and dry burning prevention sensor according to claim 5, wherein the fixed seat is provided with a first nail hole for inserting a first rivet through the movable contact piece and a second nail hole for inserting a second rivet through the fixed contact piece.
7. The high current empty pot detection and dry burning prevention sensor according to claim 1, wherein the aluminum lid is snap-fit connected to the small cup.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135809.XA CN109238482B (en) | 2018-09-28 | 2018-09-28 | Large-current empty pot detection and dry burning prevention sensor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811135809.XA CN109238482B (en) | 2018-09-28 | 2018-09-28 | Large-current empty pot detection and dry burning prevention sensor |
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| CN109238482A CN109238482A (en) | 2019-01-18 |
| CN109238482B true CN109238482B (en) | 2020-06-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811135809.XA Active CN109238482B (en) | 2018-09-28 | 2018-09-28 | Large-current empty pot detection and dry burning prevention sensor |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| KR102265518B1 (en) * | 2019-10-07 | 2021-06-16 | 스마트전자 주식회사 | Circuit protecting device |
| CN111968879B (en) * | 2020-09-18 | 2024-06-04 | 佛山市川东磁电股份有限公司 | Magnetic steel sensor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149437A (en) * | 1995-11-03 | 1997-05-14 | 株式会社东金 | Temperature detecting device for cooking device |
| CN2874975Y (en) * | 2006-01-24 | 2007-02-28 | 颜陶 | Magnetic shield anti-dry burning sensor for micro computer type rice cooker |
| CN204377159U (en) * | 2015-02-03 | 2015-06-03 | 佛山市川东磁电股份有限公司 | A kind of dry-burning preventing sensor fuse installation structure |
| CN204445440U (en) * | 2015-02-03 | 2015-07-08 | 佛山市川东磁电股份有限公司 | A kind of dry-burning preventing sensor of improvement |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100932771B1 (en) * | 2008-10-06 | 2009-12-21 | 고려화공 주식회사 | Device of self-generating electric power with fusible sensing unit |
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2018
- 2018-09-28 CN CN201811135809.XA patent/CN109238482B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149437A (en) * | 1995-11-03 | 1997-05-14 | 株式会社东金 | Temperature detecting device for cooking device |
| CN2874975Y (en) * | 2006-01-24 | 2007-02-28 | 颜陶 | Magnetic shield anti-dry burning sensor for micro computer type rice cooker |
| CN204377159U (en) * | 2015-02-03 | 2015-06-03 | 佛山市川东磁电股份有限公司 | A kind of dry-burning preventing sensor fuse installation structure |
| CN204445440U (en) * | 2015-02-03 | 2015-07-08 | 佛山市川东磁电股份有限公司 | A kind of dry-burning preventing sensor of improvement |
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