WO2005055784A1

WO2005055784A1 - A temperature-control switch, an electrical-heating jug and a wireless electrical-heating jug

Info

Publication number: WO2005055784A1
Application number: PCT/CN2004/001250
Authority: WO
Inventors: Zhicheng Shao
Original assignee: Zhicheng Shao
Priority date: 2003-12-11
Filing date: 2004-11-02
Publication date: 2005-06-23
Also published as: CN1545966A; CN1274269C

Abstract

The invention relates to an electrical-heating technology for liquid, to a temperature-control switch, an electrical-heating jug, and a wireless electrical-heating jug. The problems described below may be solved. Since the water in a jug has been boiled or baked, thereby cooling or reheating the jug, and after the water is baked, resulting in fire, and since sound-alarm occurs for long time after the water is boiled, thereby forming noise. The temperature-control switch includes a body (1), primary electrical-connecting ends (2), (3), a movable contact piece (4), a static contact piece (5) and a first temperature sensing control device (7), there are a second temperature sensing bimetal piece (8) and a secondary electricalconnecting end (9) on the body (1), a secondary movable contact piece (10) is provided on the secondary electrical-connecting end (9), a secondary push rod (11) is provided between the second temperature sensing bimetal piece (8) and the secondary movable contact piece (10), after the first temperature sensing control device (7) is actuated due to being heated, when the second temperature sensing bimetal piece (8) is upwarped due to being heated, the secondary push rod (11) may be actuated to push the secondary movable contact piece (10), moving to the movable contact piece (4) and contacting with it. A vapor sensing generator (22) is added to the electrical-heating jug and the wireless electrical-heating jug by using the said temperature-control switch.

Description

Temperature control switch, electric kettle and cordless electric kettle

The invention belongs to the technical field of liquid electric heating, and relates to a temperature control switch, an electric kettle and a cordless electric kettle. Background technique

In a Chinese patent document with a public number of CN1474427A and the name of a rocker steam temperature controller, a rocker steam temperature controller with multi-channel switch control is disclosed, including a fixed base, which is arranged on the fixed base and can be tilted. There is a movable piece, a metal temperature-sensitive contact piece is provided on the fixed seat, a reset elastic member is provided between the movable piece and the fixed seat, and a fixed contact piece is provided on the fixed seat and can be touched and fixed by the other end of the movable piece. The movable contact piece of the fixed base is separated from the sheet, and the other end of the movable member is provided with a conductive contact capable of reaching the movable contact piece of the fixed base. The movable piece is provided with a contact movable contact piece which is in communication with the conductive head. There is a second fixed contact piece which can be touched by the moving contact piece of the contact with the moving part, and a normally closed contact and two normally open contacts are formed on a rocker steam temperature controller. The problem with this rocker steam temperature controller is that the normally closed contact and normally open contact are switched by a metal temperature-sensitive contact. When the metal temperature-sensitive contact is heated, the normally closed contact is opened and the normally open contact is opened. The points are closed. After the metal temperature contact is cooled and reset, the two normally open contacts remain closed. Because this structure of the swing-arm steam temperature controller is mainly used in electric kettles, the normally open contacts need to be opened by the user by applying a force on the movable part. When it is used in an electric kettle, it will cause an alarm after the water is burned, which will cause the alarm to become noise for a long time.

In Chinese patent literature, the publication number is CN1286798A, the name is the improvement of the thermal response actuator, and the publication number is CN1368666A., The name is temperature controller, electrical connector and electric water heater, and the publication number is CN1359124A, and the name is improved electrical appliance. A temperature-controlled thermostat, an electric connector, and an electric water heater with an invention patent application are disclosed in the specification. Also in the British patent, the public identification numbers are GB2213646, 2221795, 2212664, and a temperature controller is also introduced. These temperature controllers include an electrical connection end, a movable contact piece and a fixed contact piece connected to the electrical connection end, and drive the actuator. Temperature control device for the movement of the contacts. When these thermostats are used in electric kettles, they are only used to control the on and off of the electric heater. When the electric kettle reaches a set temperature, such as when the water in the kettle is boiled or dried, the temperature is sensed. The control device moves and pushes the moving contact to separate it from the fixed contact, so as to cut off the power. After the power is cut off, when the user leaves the electric kettle at a certain distance, he cannot know the working state of the kettle at this time, which may cause the water to be boiled for a certain period of time to be cooled or reheated, and after the water is dried, in case of temperature Failure of the controller can easily lead to continued heating and fire. Summary of the invention.

A first object of the present invention is to provide a temperature control switch that can be powered on after a temperature sensing action of a first temperature sensing control device, and then automatically disconnected after a period of time.

A second object of the present invention is to provide the above-mentioned temperature control switch to provide a power source for cutting off the electric heater when the liquid in the container is boiled, and can generate an alarm, and the alarm will be automatically generated when the liquid is cooled after boiling for a period of time. Electric kettle hanging.

A third object of the present invention is to provide the above-mentioned temperature control switch to provide a power source for cutting off the electric heater when the liquid in the container is boiled, and can generate an alarm, and the alarm will be automatically generated when the liquid is cooled after boiling for a period of time. Cordless electric kettle hanging.

In order to achieve the first object of the present invention, the temperature control switch includes a main body, a main electrical connection terminal provided on the main body, a main electrical connection terminal, a movable contact piece and a fixed contact piece, and a drive of the movable contact piece. The first temperature-sensing control device is provided with a second temperature-sensing bimetal piece and an auxiliary electric connection terminal on the body, and the auxiliary electric connection terminal is provided with an auxiliary moving contact piece. An auxiliary ejector is provided between the contact pieces. When the first temperature sensing control device is heated, the second temperature-sensitive bimetal can be driven to warp when the second temperature-sensitive bimetal is warped. Direction of movement and contact with it.

In the present invention, a second temperature-sensitive bimetal and an auxiliary ejector are added on the basis of the prior art. When the second temperature-sensitive bimetal is heated, the auxiliary ejector is pushed to move the auxiliary movable contact piece in the direction of the movable contact piece. The auxiliary moving contact piece can reach the position where the moving contact piece can reach. Once the first temperature sensing control device is heated, the moving contact piece moves in the direction of the auxiliary moving contact piece, so that the moving contact piece and the auxiliary moving contact piece can contact. After the second temperature-sensitive bimetal is cooled and reset, the auxiliary moving contact is reset due to its own elastic force, and is separated from the moving contact to achieve the purpose of automatically opening the normally open contact.

In order to achieve the second object of the present invention, the electric kettle includes a pot body, and a temperature control switch is provided on the pot body. The temperature control switch includes a body, and a main electrical connection end provided on the body is connected to the main body. The moving contact piece and the fixed contact piece connected to the electrical connection end, the first temperature sensing control device for driving the movement of the moving contact piece, the electric heating tube on the pot body and the main electrical connection end of the temperature control switch are connected in series in the power circuit, The body is provided with a second temperature-sensitive bimetal sheet and an auxiliary electrical connection end. The auxiliary electrical connection end is provided with an auxiliary moving contact sheet, and an auxiliary top is provided between the second temperature-sensitive bimetal sheet and the auxiliary moving contact sheet. When the first temperature-sensing control device is heated, the second temperature-sensing bimetal can be driven to warp when the second temperature-sensing bimetal is warped, and the auxiliary contact can be moved toward the contact, An induction steam sounder is connected to the main electrical connection end and the auxiliary electrical connection end connected to the moving contact piece, and the first temperature sensing control device and the second temperature sensing bimetal are arranged in a steam channel in the pot body. , '

Since the above-mentioned temperature control switch is used in the electric kettle, the moving contact piece and the fixed contact piece of the temperature control switch are connected in series to the electric heating In the device circuit, it is used to control the boiled water in the pot body, and the auxiliary electrical connection end and the police alarm are equivalently connected in series to the normally open contact circuit controlled by the first temperature sensing control device, thereby achieving After the water in the pot is boiled, the first temperature control device controls to cut off the power of the electric heater, and then the auxiliary electrical connection terminal and the alarm are connected to the normally open contact circuit controlled by the first temperature control device. When the normally open contact is closed after the first temperature sensing control device is heated, the alarm is powered on and sounds, and an alarm is generated.

In order to achieve the third object of the present invention, the cordless electric kettle includes a pot body, a base on which the pot body is placed, and an upper electrical connector and a lower electrical connector between the pot body and the base, on the pot body A temperature control switch is provided. The temperature control switch includes a main body, a main electrical connection terminal provided on the main body, a moving contact piece and a fixed contact piece connected to the main electrical connection end, a first temperature sensing control device for driving the movement of the moving contact piece, and a pot. The electric heating tube on the body and the main electrical connection end of the temperature control switch are connected in series to the power supply end of the power-on connector, and the body is provided with a second temperature-sensitive bimetal sheet and an auxiliary electrical connection end. The connecting end is provided with an auxiliary moving contact piece, and an auxiliary jack is provided between the second temperature sensitive bimetal piece and the auxiliary moving contact piece. When the first temperature sensing control device is heated, the second temperature sensitive bimetal When the plate is warped by heat, it can drive the auxiliary ejector rod to push the auxiliary moving contact piece in the direction of the moving contact piece and make contact with it. The main electric connection end and the auxiliary electric connection end connected with the moving contact piece are induced by steam. Sounder, the first temperature sensing control device and the second temperature sensing bimetal sheet are arranged Steam pot body passage.

Since the above-mentioned temperature control switch is used in the cordless electric kettle, the moving contact piece, the fixed contact piece of the temperature control switch and the electric heater are connected in series in the power-on connector circuit, and the power-on connector and the power-down connector are plugged in to be energized. In this case, it is used to control the boiling of water in the pot, and the auxiliary electrical connection end and the alarm are equivalently connected in series to a normally open contact loop controlled by the first temperature control device, thereby realizing the After the water is boiled, the first temperature-sensing control device controls the power of the electric heater to be cut off. After that, the power transmission connection terminal and the alarm are connected to the constant temperature contact circuit controlled by the first temperature-sensing control device. After the control device is heated, the normally open contact is closed, the alarm is powered on and sounds, and an alarm is generated. BRIEF DESCRIPTION OF THE DRAWINGS

The illustration of the drawings is as follows:

FIG. 1 is a bottom structural view of the present invention.

FIG. 2 is a cross-sectional view taken along AA of FIG. 1.

Fig. 3 is a sectional view taken along the line B-B in Fig. 1.

Fig. 4 is a perspective partial sectional view of the present invention.

FIG. 5 is a schematic structural diagram between a first temperature sensing control device, a moving contact piece, a fixed contact piece, and an auxiliary moving contact piece.

FIG. 6 is a schematic structural diagram of an electric kettle according to the present invention. FIG. 7 is a schematic structural diagram of a cordless electric kettle according to the present invention. detailed description

The specific embodiments of the temperature control switch, the electric kettle, and the cordless electric kettle according to the present invention will be further described in detail below with reference to the accompanying drawings. As shown in FIGS. Terminals 2, 3, moving contact piece 4, fixed contact piece 5, first temperature-sensitive bimetal piece 6, first temperature-sensitive control device 7, second temperature-sensitive bimetal piece 8, auxiliary electrical connection terminal 9, auxiliary moving contact Sheet 10, auxiliary ejector pin 11, rocker arm 12, groove 13, elastic sheet 14.

The main body 1 and the rocker arm 12 are made of plastic. The rocker arm 12 can be tilted on the body 1, and there is an elastic piece 14 between the main body 1 and the rocker arm 12. When the rocker arm 12 is tilted by a certain angle under the action of an external force, it will be automatically tilted to another position by the elastic force of the elastic piece 14. A first temperature-sensitive bimetal sheet 6 is provided on the body 1, and a first ejector rod 15 is provided between the first temperature-sensitive bimetal sheet 6 and the rocker arm 12. In a normal state, the front end of the rocker arm 12 and one end leaning against the first ejector rod 15 are leaned toward the body 1. At this time, the first ejector rod 15 is just sandwiched between the rocker arm 12 and the first temperature-sensitive bimetal 6 When the first temperature-sensitive bimetal 6 is warped by heat, the first ejector pin 15 is pushed, so that the rocker arm 12 is tilted by a certain angle under the force of the first ejector pin 15 and will be under the elastic force of the elastic sheet 14 Automatically tilt to another position. The other end of the rocker arm 12 will touch the movable contact piece 4 in the main body 1 to separate the fixed contact piece 5 and the movable contact piece 4 which are originally kept in contact. This is the structure of the prior art. '

The body 1 is provided with a second temperature-sensitive bimetal sheet 8. The second temperature-sensitive bimetal sheet 8 has the same structure as the first temperature-sensitive bimetal sheet 6, and its thermal warping parameters can be selected according to technical requirements. The main body 1 is provided with an auxiliary electric connecting end 9, an auxiliary moving contact 10 is provided on the auxiliary electric connecting end 9, and an auxiliary ejector rod 11 is provided between the second temperature-sensitive bimetal 8 and the auxiliary moving contact 10. The moving contact piece 10 is a metallic copper piece, which has a certain elasticity, and is normally pressed in the direction of the auxiliary ejector pin 11 in a normal state. The movable contact piece 4 is located between the fixed contact piece 5 and the auxiliary movable contact piece 10 and is kept separated from each other. Only when the first temperature-sensitive bimetal piece 6 lifts the movable contact piece 4 and the auxiliary ejector rod 11 doubles the auxiliary movement. After the contact piece 10 is lifted up, after the movable contact piece 4 and the auxiliary movable contact piece 10 are both moved, the two can be contacted. -The first temperature-sensitive bimetal piece 6 and the second temperature-sensitive bimetal piece 8 are disposed in the same groove 13 of the body 1. The first temperature-sensitive bimetal piece 6 has a higher warping value than the second temperature-sensitive bimetal Tablet 8. When the bottom surface of the main body 1 is placed on a panel, the groove 13 of the main body 1 forms a cavity with the panel, and steam is passed into the cavity. When the first temperature-sensitive bimetal 6 is heated to 75 ° C, When the thermal warping value of the second temperature-sensitive bimetal sheet 8 is 75 ° C, both the second temperature-sensitive bimetal sheet 8 and the first temperature-sensitive bimetal sheet 6 will act. At this time, the fixed contact sheet 5 and the moving contact The blade 4 is separated, and the movable contact piece 4 and the auxiliary movable contact piece 10 are in contact with each other. When the steam flow into the cavity is stopped for a period of time, the second temperature-sensing double gold The metal piece 8 is reset, and the movable contact piece 4 and the auxiliary movable contact piece 10 are separated. Whether at this time or later, whether the first temperature-sensitive bimetal piece 6 is reset, the fixed contact piece 5 and the movable contact piece 4 cannot be automatically moved due to the rocker arm 12. Attach and stay separated at all times.

As shown in FIG. 5, when the first temperature sensing control device 7 is heated, the movable contact piece 4 can be separated from the fixed contact piece 5. The solid line in the figure indicates the initial state of the movable contact piece 4 and the auxiliary movable contact piece 10. The dotted line indicates the state after the operation.

The first temperature sensing control device 7 includes a warp arm 12 provided on the main body 1 and capable of tilting, an elastic piece 14 abutting between the main body 1 and the warp arm 12, and one end of the warp arm 12 is tilted down toward the main body 1. The movable contact piece 4 can be touched to separate it from the fixed contact piece 5. When the other end of the warp arm 12 is tilted down to the main body 1, it can be touched and warped by the first temperature-sensitive bimetal 6 after being warped by heat. The first temperature-sensitive bimetal sheet 6 and the second temperature-sensitive bimetal sheet 8 are disposed in a steam passage 24 in the pot body 19.

As shown in FIG. 6, the electric kettle according to the present invention includes a kettle body 19, an electric heating pipe 21, the temperature control switch 20, an induction steam sounder 22, and a steam channel 24 as described above. The induction steam sounder 22 is a buzzer.

The first temperature-sensitive bimetal piece 4 and the second temperature-sensitive bimetal piece 10 are disposed in the same groove 13 of the body 1, and the groove 13. is disposed in the steam passage 24 in the pot body 19.

The electric heating pipe 21 is provided on the bottom surface of the pot body 19, and a handle 18 is provided on the pot body 19. The steam channel 24 is inside the handle 18, one end communicates with the inner cavity of the pot body 19, and the other end is connected to the temperature control switch 20. The kettle body 19 is provided with the temperature control switch 20 as described above, and the steam channel 24 opens into the cavity formed by the groove 13 of the temperature control switch 20 and the wall surface of the kettle body 19. When the water of the kettle body 19 is boiled, the steam It will pass through the steam passage 24 to reach the first temperature-sensitive bimetal 6 and the second temperature-sensitive bimetal 8.

As shown in FIG. 7, the cordless electric kettle according to the present invention includes a temperature control switch 20, a pot body 23, a steam channel 24, a base 25, a power-on connector 26, a power-down connector 27, and an induction steam sounder 22.

The first temperature-sensitive bimetal sheet 4 and the second temperature-sensitive bimetal sheet 10 are disposed in the same groove 13 of the body 1, and the groove 13 is disposed in the steam passage 24 in the pot body 19.

When the water is boiled, the second temperature-sensitive bimetal 10 senses the temperature of the water vapor and acts, and the auxiliary moving contact 12 is pushed up by the second ejector 13 driven by the auxiliary moving contact 12. Continue to boil water, and the generated water vapor will soon heat up the first temperature-sensitive bimetal piece 4, the moving contact piece 9 is pushed up by the first ejector pin 5, and contacts the auxiliary moving contact piece 12, and the buzzer sounds when it is energized. An alarm is generated, and the power of the 16 circuit of the electric heater is cut off to stop heating. After a period of time, because no steam is generated, the temperature-sensitive bimetal is cooled and reset, the auxiliary contact 12 is popped apart from the movable contact 9, and the buzzer circuit is turned off to stop sounding. At this time, the When pressed, the circuit of the solid electric heater 16 is always off. The invention realizes automatic control of boiled water through a mechanical structure, which avoids the problem of long-term audible alarm due to the user's failure to deal with it in time after the water is boiled and the problem of noise interference. '

Claims

Claim

1. A temperature control switch comprising a main body (1), main electrical connection terminals (2), (3) provided on the main body (1), and a movable contact connected to the main electrical connection terminals (2), (3) The first temperature-sensing control device (7) for driving the action of the movable contact piece (4), the fixed contact piece (5) and the fixed contact piece (5), is characterized in that: a second temperature-sensitive pair is provided on the body (1). A metal piece (8) and an auxiliary electric connection end (9), the auxiliary electric connection end (9) is provided with an auxiliary moving contact piece (10), and the second temperature-sensitive bimetal piece (8) and the auxiliary moving contact piece (10) There are auxiliary jacks (11) between them. When the first temperature-sensitive control device (7) is heated, the second temperature-sensitive bimetal (8) can drive the auxiliary jacks when warped. The lever (11) pushes the auxiliary contact piece (10) to move in the direction of the contact piece (4) and contacts it.

2. The temperature control switch according to claim 1, characterized in that: the first temperature sensing control device (7) comprises a rocker arm (12) provided on the body (1), which can be tilted, and is pressed against the body (1) ) And the elastic piece (14) between the rocker arm (12), when the one end of the rocker arm (12) is tilted down toward the body (1), the movable contact piece (4) can be touched to separate it from the fixed contact piece (5) When the other end of the rocker arm (12) is tilted down to the body (1), it can be touched by the first temperature-sensitive bimetal sheet (6) and warped after being warped by heat.

3. The temperature control switch according to claim 1 or 2, characterized in that: the first temperature-sensitive bimetal piece (4) and the second temperature-sensitive bimetal piece (10) are disposed on the same body (1). In the groove (13).

4. An electric kettle comprising a pot body (19), a temperature control switch is provided on the pot body (19), the temperature control switch comprises a body '(1), and a main electric power provided on the body (1) Connection terminals (2), (3), and main electrical connection terminals (2),

(3) the connected moving contact piece (4) and the fixed contact piece (5), the first temperature sensing control device (7) for driving the moving contact piece (4), and the electric heating tube (21) on the pot body (19) It is connected in series with the main electrical connection terminals (2) and (3) of the temperature control switch (20) in the power supply circuit, and is characterized in that: a second temperature-sensitive bimetal piece (8) is provided on the body (1) And auxiliary power connection end (9), the auxiliary power connection end (9) is provided with an auxiliary moving contact piece (10), between the second temperature-sensitive bimetal sheet (8) and the auxiliary moving contact piece (10) An auxiliary ejector rod (11) is provided. When the first temperature sensing control device (7) is heated, the second temperature sensitive bimetal (8) can be driven to warp when heated, and the auxiliary ejection rod (11) can be driven to push The auxiliary moving contact piece (10) moves in the direction of the moving contact piece (4) and contacts with it, and the main electrical connection end (2) and the 镩 electric connection end (9) connected to the moving contact piece (4) are connected to The induction steam sounder (22), the first temperature-sensing control device (7) and the second temperature-sensing bimetal (8) are arranged in a steam channel (24) in the pot body (19).

5. The electric kettle according to claim 4, characterized in that: the first temperature sensing control device (7) comprises a rocker arm (12) provided on the body (1), which can be tilted, and is pressed against the body (1) The spring piece (14) between the rocker arm (12), and when the one end of the rocker arm (12) is tilted down to the main body (1), the movable contact piece (4) can be touched to the fixed contact piece (5) Separately, when the other end of the rocker arm (12) is tilted down to the body (1), it can be touched and warped by the first temperature-sensitive bimetal (6) after being warped by heat. The first temperature-sensitive double The metal piece (6) and the second temperature-sensitive bimetal piece (8) are disposed in a steam channel (24) in the pot body (19).

6. The electric kettle according to claim 5, characterized in that: the first temperature-sensitive bimetal sheet (4) and the second temperature-sensitive bimetal sheet (10) are disposed in the same groove (1) of the body (1). 13), the groove (13) is provided in the steam channel (24) in the pot body (19).

7. A cordless electric kettle, comprising a pot body (23), a base (25) on which the pot body (23) is placed, an electric connector (26) and a lower part between the pot body (23) and the base (25) An electric connector (27) is provided with a temperature control switch on the pot body (23). The temperature control switch includes a main body (1), and the main electrical connection ends (2), (3) are arranged on the main body (1). The moving contact piece (4) and the fixed contact piece (5) connected to the main electrical connection ends (2) and (3), the first temperature sensing control device (7) for driving the moving contact piece (4), and the pot body ( The electric heating tube (21) on 23) and the main electrical connection ends (2) and (3) of the temperature control switch (20) are connected in series to the power supply end of the power-on connector (26), which are characterized by: The body (1) is provided with a second temperature-sensitive bimetal piece. (8) and an auxiliary electric connection end (9), wherein the auxiliary electric connection end (9) is provided with an auxiliary moving contact piece (10), An auxiliary jack (11) is provided between the temperature-sensitive bimetal piece (8) and the auxiliary moving contact piece (10). When the first temperature-sensitive control device (7) is heated, the second temperature-sensitive bimetal piece (8) When heated and warped, it can drive auxiliary ejector (11) to push auxiliary The contact piece (10) moves in the direction of the moving contact piece (4) and contacts with it. The main electrical connection end (2) and the auxiliary electrical connection end (9) connected to the moving contact piece (4) are connected with induction steam. The sounder (22), the first temperature sensing control device (7) and the second temperature sensing bimetal sheet (8) are arranged in a steam channel (24) in the pot body (19). .

8. The cordless electric kettle according to claim 7, characterized in that: the first temperature-sensing control device (7) comprises a rocker arm (12) provided on the body (1), which can be tilted, and pressed against the body (1) ) And the elastic piece (14) between the rocker arm (12), when one end of the rocker arm (12) is tilted down to the body (1), the movable contact piece (4) can be touched to the fixed contact piece '(5) When the other end of the rocker arm (12) is tilted down toward the body (1), it can be touched by the first temperature-sensitive bimetal

(6) The first temperature-sensitive bimetal sheet (6) and the second temperature-sensitive bimetal sheet (8) are touched and warped after being warped by heat, and are arranged in a steam channel (24) in the pot body (19).

9. The cordless electric kettle according to claim 8, characterized in that: the first temperature-sensitive bimetal (4) and the second temperature-sensitive bimetal (10) are disposed in the same groove of the body (1) (13), the groove (13) is provided in the steam channel (24>) in the pot body (19).