CN110265258B

CN110265258B - Temperature controller

Info

Publication number: CN110265258B
Application number: CN201910634286.1A
Authority: CN
Inventors: 杨强; 郑和生; 王明龙
Original assignee: Zhejiang Jiatai Electrical Appliance Co Ltd
Current assignee: Zhejiang Jiatai Electrical Appliance Co Ltd
Priority date: 2019-07-15
Filing date: 2019-07-15
Publication date: 2021-01-15
Anticipated expiration: 2039-07-15
Also published as: CN110265258A

Abstract

A temperature controller comprises a main shell, a fixed plate fixedly arranged on the main shell, and a thermosensitive metal actuator fixedly arranged on the fixed plate, wherein a plurality of concentric cylindrical annular electrodes are arranged in a back annular groove of the main shell, the concentric cylindrical annular electrodes are connected with a plurality of lugs arranged on the front surface of the main shell, one or a plurality of lugs are provided with a contact switch, the contact switch comprises a static contact, a movable contact arm, a power-assisted ceramic rod, a supporting piece with a limiting hole for supporting the limiting power-assisted ceramic rod, and a locking device of the contact switch, the locking device comprises a strip bullet body arranged on the main shell, a lug connected to the lower part of the power-assisted ceramic rod, and a reset frame which is linked with a lower connector to move elastically and can move up and down, the free end of the strip bullet body is correspondingly matched with the lug under the action of the reset frame to realize the limiting locking of the power-assisted ceramic, the design is flexible, the structure is reasonable, simple, convenient and compact, the structure is small and practical, the assembly is convenient, and the potential safety hazard is thoroughly eliminated.

Description

Temperature controller

Technical Field

The invention relates to a temperature controller, in particular to a temperature controller of an electric tea set type electric appliance.

Background

The electric tea set electrical apparatus of current area dry combustion method mainly includes: temperature controller, thermistor, electric heating element, circuit board, power etc. The electric heating element and the thermistor are arranged in the kettle body, wherein the temperature controller, the electric heating element and the power supply are connected with the circuit board, and the data are transmitted to the integrated circuit on the circuit board to control the relay to be closed and opened through the numerical value of the thermistor externally connected between the signal electrodes of the temperature controller when the water temperature is different, so that the electrified heating of the electric heating element and the power supply disconnection are realized. Since the thermistor cannot be operated to cut off the power supply when there is no water, dry-heating prevention is generally mainly used in which a thermosensitive metal actuator installed below the bottom of a liquid heating dish, particularly a boiling dish, is used to control the connection between the electrical connectors. However, after the water in the vessel is dried, the temperature of the vessel is continuously raised, so that the thermosensitive metal actuator acts to push the ejector rod clamped between the thermosensitive metal actuator and the movable contact piece to act, the movable contact piece is pushed open, the movable contact piece is separated from the electric connector, a power supply loop is cut off, the electric heating element is powered off to stop working, and the purpose of temperature control is achieved. However, after the electric heater is powered off, the temperature of the container is reduced, the thermosensitive metal actuator is restored to act, the ejector rod is reset along with the elastic force of the movable contact piece, the movable contact piece is contacted with the electric connector, a circuit loop is conducted, the electric heating element is electrified again to generate heat, and the circulation is repeated in such a way, so that the electric tea appliance is continuously switched on and off, the contact service life between the movable contact piece and the contact of the electric connector, namely the contact switch, is shortened, the damage of the contact is caused after a long time, once the contacts are fused together, a fire disaster is caused, and the safety and the service life of a product are seriously influenced. For the emergence of avoiding above phenomenon, present electric tea set electrical apparatus generally adopts the torsional spring to come the control contact switch action, however it has strict accurate requirement to the position and the distance and the torsion at torsional spring both ends, and its torsional spring position distance of temperature controller of different specifications and torsion are different again, and this causes very big mismatching rate, and the torsional spring is extravagant very big. Furthermore, lower connector has an insertion depth problem with the temperature controller when inserting the cooperation, in case the connector degree of depth is not enough down, then the contact switch function at torsional spring place will unable the realization, and the general matching nature of temperature controller of this structure is very low.

Disclosure of Invention

The invention aims to provide a temperature controller which has a simple structure, is safe and stable and has a secondary dry burning prevention function aiming at the defects in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a temperature controller comprises a main shell, a fixing plate fixedly arranged on the main shell and a thermosensitive metal actuator fixedly arranged on the fixing plate, wherein a plurality of concentric cylindrical annular electrodes are arranged in an annular groove on the back surface of the main shell and are connected with a plurality of corresponding lugs arranged on the front surface of the main shell, one or a plurality of lugs are provided with a contact switch, the contact switch comprises a fixed contact, a movable contact arm, a power-assisted ceramic rod and a supporting piece with a limiting hole for supporting the limiting power-assisted ceramic rod, the movable end of the movable contact arm is arranged below the thermosensitive metal actuator, the movable end of the movable contact arm is provided with a contact matched with the fixed contact, and the power-assisted ceramic rod passes through the limiting hole of the supporting piece and is erected between the movable contact arm and the thermosensitive metal actuator; the locking device comprises a long-strip elastic body arranged on the main shell, a convex block connected to the lower part of the power-assisted porcelain rod and a reset frame linked with the lower connector and capable of controlling up-and-down elastic movement, wherein the reset frame is provided with a contraction guide part obliquely arranged or obliquely and convexly arranged on the lower inner wall of the reset frame, the contraction guide part protrudes upwards and inwards in the vertical direction, namely towards the long-strip elastic body, the free end of the long-strip elastic body is correspondingly matched with the convex block under the action of the reset frame to realize the limiting and locking of the power-assisted porcelain rod, namely when the lower connector matched with the temperature controller is inserted, the reset frame loosens the limitation on the middle section of the long-strip elastic body, the topmost end of the power-assisted porcelain rod convex block is exposed out of the upper surface of the main shell, the free end of the long-strip elastic body leans against the outer wall of the convex; when the contact switch acts, namely the movable end of the movable contact arm is driven by the thermosensitive metal actuator, the movement-assisting ceramic rod moves downwards in a linkage manner to enable the movable end of the movable contact arm to jump downwards, the contact on the movable contact arm is separated from the fixed contact, meanwhile, the lug of the movement-assisting ceramic rod sinks, the free end of the long-strip elastomer moves downwards to the upper part of the lug under the action of the elastic force of the free end and abuts against the outer wall of the upper part of the movement-assisting ceramic rod, and the contact switch acts and enables the state of the contact switch to be locked, so that the function of preventing secondary dry; the lower connector is separated from the temperature controller, the reset frame moves downwards elastically, the contraction guide part of the lower inner wall of the reset frame supports and pushes the middle section of the strip-shaped elastic body, the middle section of the strip-shaped elastic body moves inwards to force the free end of the strip-shaped elastic body to be away from the movement assisting ceramic rod, the contact switch is unlocked, and in the state, when the double-heat-sensitive metal actuator is reset, the movable contact arm jumps upwards, the movable contact and the static contact are reset, namely, the contact switch is reset.

As an improvement: the fixing plate is also provided with 8-shaped fixing holes for fixing the temperature sensor, namely the 8-shaped fixing holes comprise guide insertion holes with the diameter larger than that of the temperature sensor, contraction fixing holes which are communicated with the guide insertion holes and used for clamping and fixing the temperature sensor, and contraction necks which are communicated between the guide insertion holes and the contraction fixing holes.

As an improvement: and a clamping groove matched with the shrinkage fixing hole and the shrinkage neck is formed in the periphery of the temperature sensor.

As an improvement: the position of the near supporting piece on the main shell body is also provided with a limit cover covering the free end of the long-strip projectile body, and the free end of the long-strip projectile body can move left and right below the limit cover.

As an improvement: the fixed plate on fixed mounting have about two temperature sensing metal actuator, the main casing body on be equipped with two contact switches that correspond to two temperature sensing metal actuator respectively, two contact switches all be equipped with locking device, and rectangular body coupling an organic whole in two locking device is U type body, promptly two support arms about U type body be about two locking device's rectangular body.

As an improvement: reset and be door type frame, promptly reset and put up including spacing two stabilizer blades of the left and right sides on the main casing body, connect the connection crossbearer between two stabilizer blades, establish or the protruding shrink guide portion of locating stabilizer blade upper portion and being connected crossbearer both ends bottom surface to one side respectively, shrink guide portion inwards protrusion in vertical direction about two stabilizer blades, when the unblock of contact switch, reset and put down, support through the shrink guide portion that resets and push away U type elastomer about two support arms be rectangular projectile, make U type projectile about two support arms inwards move, rectangular projectile free end is kept away from and is helped the porcelain rod, realizes the unblock of contact switch.

According to the temperature controller, the locking function of the contact switch is realized by matching the long-strip elastomer and the bumps at the lower part of the power-assisted ceramic rod and resetting the resetting frame, so that the secondary dry burning prevention function is realized, the torsion spring element is not arranged in the self-locking assembly, the influence of the elasticity and the curvature position of the torsion spring element is avoided, and meanwhile, the problem of the matching insertion depth of the lower connector and the temperature controller is solved. The long-strip bullet body is horizontally arranged on the main shell body, the whole size cannot be increased, the assembly is very convenient, and the locking device has no requirement on the placement position of the gravity center of the equipment, so that the whole applicable environment or field of the product is wider. The invention has the advantages of smart design, reasonable, simple and compact structure, small and practical structure, convenient assembly and thorough elimination of potential safety hazards.

The invention is further described with reference to the following figures and detailed description.

Drawings

Fig. 1 is a schematic view of an overall structure of an embodiment of a thermostat according to the present invention.

Fig. 2 is an exploded view of the thermostat of fig. 1.

Detailed Description

As shown in fig. 1 and 2, a thermostat according to an embodiment of the present invention includes a main housing 1, a fixing plate 2 fixedly mounted on the main housing 1, two left and right heat sensitive metal actuators 3 fixedly mounted on the fixing plate 2, a plurality of concentric cylindrical ring electrodes are arranged in the annular groove on the back surface of the main shell 1, the concentric cylindrical ring electrodes are connected with a plurality of corresponding lugs arranged on the front surface of the main shell, one or a plurality of the lugs are provided with contact switches, the main shell of the embodiment is provided with two contact switches respectively corresponding to the two thermosensitive metal actuators 3, the contact switch comprises a fixed contact, a movable contact arm 4, an auxiliary ceramic rod 11 and a support piece 12 with a limiting hole for supporting and limiting the auxiliary ceramic rod 11, the support piece of the embodiment is integrally formed on the main shell, and the support piece 12 is matched with the auxiliary ceramic rod 11 through a central through hole in a penetrating manner to support the auxiliary ceramic rod 11. The movable end of the movable contact arm is arranged below the heat-sensitive metal actuator 3, the movable end of the movable contact arm is provided with a contact matched with the fixed contact, and the auxiliary moving porcelain rod 11 passes through the limiting hole of the supporting piece and is vertically arranged between the movable contact arm and the heat-sensitive metal actuator; the two contact switches are provided with locking devices, and each locking device comprises a long-strip elastic body 7-1 arranged on the main shell, a convex block 11-1 connected to the lower part of the power-assisted porcelain rod 11, and a reset frame 6 which is linked with the lower connector and can be controlled to elastically move up and down. In order to save cost and make it multifunctional, the long-strip bullets 7-1 in the two locking devices of the present embodiment are connected into a U-shaped bullet 7, that is, the left and right arms of the U-shaped bullet 7 are the long-strip bullets 7-1 of the left and right locking devices. The free end of the long-strip projectile body 7-1 is correspondingly matched with the convex block 11-1 under the action of the reset frame 6 to realize the limiting locking of the power-assisted porcelain rod 11, in order to simultaneously control the locking devices at the left side and the right side and reduce the volume, the reset frame 6 of the embodiment is a door-shaped frame, namely, the reset frame 6 comprises a left support leg 6-1 and a right support leg 6-1 which can be limited on the main shell, a connecting transverse frame 6-2 connected between the two support legs and a contraction guide part 6-3 which is respectively obliquely or obliquely and convexly arranged on the upper parts of the support legs and between the bottom surfaces at the two ends of the connecting transverse frame 6-2, and the contraction guide part 6-3 inwards protrudes out of the left support leg 6-1 and the.

When a lower connector matched with the temperature controller is inserted, the reset frame 6 loosens the limitation on the middle section of the long-strip elastic body 7-1, the topmost end of the lug of the power-assisted porcelain rod 11 is exposed out of the upper surface of the main shell, the free end of the long-strip elastic body 7-1 can be reliably connected to the outer wall of the lug 11-1 at the lower part of the power-assisted porcelain rod 11, and the locking device is in standby; when the contact switch acts, namely the movable end of the movable contact arm is driven by the thermosensitive metal actuator 3, the auxiliary ceramic rod 11 moves downwards in a linkage manner to enable the movable end of the movable contact arm to jump downwards, the contact on the movable contact arm is separated from the fixed contact, meanwhile, the lug of the auxiliary ceramic rod 11 sinks, the free end of the long-strip elastomer 7-1 moves downwards above the lug under the action of the self elasticity and abuts against the outer wall of the upper part of the auxiliary ceramic rod 11, and the contact switch acts and enables the state of the contact switch to be locked; the lower connector is separated from the temperature controller, the reset frame 6 moves downwards elastically, the left and right support arms of the U-shaped projectile body 7, namely the long projectile body 7-1, are pushed by the contraction guide part 6-3 of the reset frame 6, so that the left and right support arms of the U-shaped projectile body 7 move inwards, the free end of the long projectile body 7-1 is far away from the movement-assisting porcelain rod 11, and the unlocking of the contact switch is realized. In this state, when the dual thermosensitive metal actuator 3 is reset, the movable contact arm may jump up, and the movable contact and the stationary contact are reset, i.e. the contact switch is reset. The implementation combines and cooperates the locking device and the power-assisted ceramic rod 11 to realize the function of preventing secondary dry burning.

In order to avoid the free end of the long-strip projectile body 7-1 from jumping upwards and separating and improve the stability of the locking device, a limit cover covering the free end of the long-strip projectile body 7-1 is further arranged on the main casing body at a position close to the support member 12, and the free end of the long-strip projectile body 7-1 can move left and right below the limit cover.

In order to facilitate the assembly and the circuit connection of the whole machine, the volume is reduced and the structure of the temperature heating bottom surface is simplified, the fixing plate is further provided with 8-shaped fixing holes 10 for fixing a temperature sensor (not shown in the figure), namely, the 8-shaped fixing holes 10 comprise guide insertion holes 10-1 with the diameter larger than that of the temperature sensor, shrinkage fixing holes 10-2 communicated with the guide insertion holes 10-1 and used for clamping and fixing the temperature sensor, and shrinkage necks 10-3 communicated between the guide insertion holes 10-1 and the shrinkage fixing holes 10-2. The main shell is provided with two wiring terminals electrically connected with the temperature sensor. The contracting neck 10-3 has not only a guiding function but also an anti-slip function. The periphery of the temperature sensor is provided with a clamping groove (not marked in the figure) matched with the contraction fixing hole 10-2 and the contraction neck part 10-3. The temperature sensor can be directly assembled and fixed with the temperature sensor clamping groove in a clamping mode through the 8-shaped fixing hole 10 before the temperature controller leaves a factory, the temperature sensor is not required to be assembled additionally when the temperature controller is assembled, in the aspect of wire connection, the main shell wiring terminal is directly exposed out of one end part and connected with the outside, wiring is facilitated, and the problem that the structure below the whole temperature controller is complex and wiring errors are prone to occurring is effectively avoided.

Although the present invention has been described with reference to the above embodiments, it should be understood that the invention is not limited thereto, and various changes and modifications can be made by those skilled in the art without departing from the spirit and scope of the invention.

Claims

1. A temperature controller is characterized in that: comprises a main shell (1), a fixed plate (2) fixedly arranged on the main shell (1), and a heat-sensitive metal actuator (3) fixedly arranged on the fixed plate (2), a plurality of concentric cylindrical annular electrodes are arranged in the annular groove on the back surface of the main shell (1), the concentric cylinder ring-shaped electrode is connected with a plurality of corresponding lugs arranged on the front surface of the main shell, one or a plurality of lugs are provided with contact switches, the contact switch comprises a static contact, a movable contact arm (4), an auxiliary moving ceramic rod (11) and a supporting piece (12) with a limiting hole for supporting and limiting the auxiliary moving ceramic rod (11), the movable end of the movable contact arm is arranged below the heat-sensitive metal actuator (3), the movable end of the movable contact arm is provided with a contact matched with the fixed contact, and the auxiliary moving ceramic rod (11) passes through the limiting hole of the supporting piece and is vertically arranged between the movable contact arm and the heat-sensitive metal actuator; the device also comprises a locking device of a contact switch, the locking device comprises a strip bullet body (7-1) arranged on the main shell body (1), a convex block (11-1) connected to the lower part of the power-assisted porcelain rod (11), and a reset frame (6) linked with the lower connector and capable of controlling up-down elastic movement, the reset frame (6) is provided with a contraction guide part (6-3) obliquely arranged or obliquely and convexly arranged on the lower inner wall of the reset frame (6), the contraction guide part (6-3) is upwards inwards in the vertical direction, namely, protrudes towards the strip bullet body (7-1), the free end of the strip bullet body (7-1) is correspondingly matched with the convex block (11-1) under the action of the reset frame (6) to realize the limit locking of the power-assisted porcelain rod (11), namely, when the lower connector matched with the temperature controller is inserted, the reset frame (6) loosens the limit on the middle section of the strip bullet body (7-1), the topmost end of the lug of the power-assisted ceramic rod (11) is exposed out of the upper surface of the main shell, the free end of the long-strip elastomer (7-1) leans against the outer wall of the lug (11-1) at the lower part of the power-assisted ceramic rod (11), and the locking device is in standby; when a contact switch acts, namely the movable end of the movable contact arm is driven by the thermosensitive metal actuator (3), the movement-assisting porcelain rod (11) moves downwards in a linkage manner to enable the movable end of the movable contact arm to jump downwards, a contact on the movable contact arm is separated from a fixed contact, meanwhile, a lug of the movement-assisting porcelain rod (11) sinks, the free end of the strip-shaped elastomer (7-1) moves downwards above the lug under the action of self elasticity and abuts against the outer wall of the upper part of the movement-assisting porcelain rod (11), and the contact switch acts and enables the state of the contact switch to be locked, so that the function of preventing secondary dry burning is realized; the lower connector is separated from the temperature controller, the reset frame (6) moves downwards in an elastic mode, the contraction guide portion (6-3) of the lower inner wall of the reset frame (6) pushes the middle section of the long-strip elastic body (7-1), the middle section of the long-strip elastic body (7-1) moves inwards, the free end of the long-strip elastic body (7-1) is forced to be away from the moving-aid porcelain rod (11), the contact switch is unlocked, in the state, when the double-heat-sensitive metal actuator (3) is reset, the movable contact arm jumps upwards, the movable contact and the static contact are reset, and the contact switch is reset.

2. The temperature controller of claim 1, wherein: the fixing plate is also provided with an 8-shaped fixing hole (10) for fixing the temperature sensor, namely the 8-shaped fixing hole (10) comprises a guide insertion hole (10-1) with the diameter larger than that of the temperature sensor, a contraction fixing hole (10-2) communicated with the guide insertion hole (10-1) and used for clamping and fixing the temperature sensor, and a contraction neck (10-3) communicated between the guide insertion hole (10-1) and the contraction fixing hole (10-2).

3. The temperature controller of claim 2, wherein: the periphery of the temperature sensor is provided with a clamping groove matched with the contraction fixing hole (10-2) and the contraction neck (10-3).

4. A thermostat according to claim 1, 2 or 3, characterized in that: a limit cover covering the free end of the long-strip projectile body (7-1) is further arranged at the position, close to the support member (12), on the main casing body, and the free end of the long-strip projectile body (7-1) can move left and right below the limit cover.

5. A thermostat according to claim 1, 2 or 3, characterized in that: fixed plate (2) on fixed mounting have about two temperature sensing metal actuator (3), the main casing body on be equipped with two contact switch corresponding to two temperature sensing metal actuator (3) respectively, two contact switch all be equipped with locking device, and rectangular body (7-1) among two locking device connect an organic whole and be U type body (7), promptly two support arms about U type body (7) be about two locking device rectangular body (7-1).

6. The temperature controller of claim 4, wherein: fixed plate (2) on fixed mounting have about two temperature sensing metal actuator (3), the main casing body on be equipped with two contact switch corresponding to two temperature sensing metal actuator (3) respectively, two contact switch all be equipped with locking device, and rectangular body (7-1) among two locking device connect an organic whole and be U type body (7), promptly two support arms about U type body (7) be about two locking device rectangular body (7-1).

7. The temperature controller of claim 5, wherein: the reset frame (6) is a door-shaped frame, namely the reset frame (6) comprises a left support leg (6-1) and a right support leg (6-1) which are limited on the main shell, a connecting cross frame (6-2) connected between the two support legs, and contraction guide parts (6-3) which are respectively obliquely or obliquely and convexly arranged on the upper parts of the support legs and between the bottom surfaces of the two ends of the connecting cross frame (6-2), wherein the contraction guide parts (6-3) inwards protrude out of the left support leg and the right support leg (6-1) in the vertical direction, when a contact switch is unlocked, the reset frame (6) moves downwards, the contraction guide parts (6-3) of the reset frame (6) are used for pushing the left support arm and the right support arm of the U-shaped elastomer (7), namely the strip elastomer (7-1), the left support arm and the right support arm of the U-shaped elastomer (7) move inwards, the free end of the strip elastomer, and unlocking the contact switch.

8. The temperature controller of claim 6, wherein: the reset frame (6) is a door-shaped frame, namely the reset frame (6) comprises a left support leg (6-1) and a right support leg (6-1) which are limited on the main shell, a connecting cross frame (6-2) connected between the two support legs, and contraction guide parts (6-3) which are respectively obliquely or obliquely and convexly arranged on the upper parts of the support legs and between the bottom surfaces of the two ends of the connecting cross frame (6-2), wherein the contraction guide parts (6-3) inwards protrude out of the left support leg and the right support leg (6-1) in the vertical direction, when a contact switch is unlocked, the reset frame (6) moves downwards, the contraction guide parts (6-3) of the reset frame (6) are used for pushing the left support arm and the right support arm of the U-shaped elastomer (7), namely the strip elastomer (7-1), the left support arm and the right support arm of the U-shaped elastomer (7) move inwards, the free end of the strip elastomer, and unlocking the contact switch.