WO2003058366A1

WO2003058366A1 - A temperature controller, an electrical connector, and an electric water heater

Info

Publication number: WO2003058366A1
Application number: PCT/CN2003/000015
Authority: WO
Inventors: Zhicheng Shao
Original assignee: Zhicheng Shao
Priority date: 2002-01-14
Filing date: 2003-01-09
Publication date: 2003-07-17
Also published as: GB2384117A; AU2003203323A1; ZA200404928B; CN1368666A; CN1186703C; GB0214456D0; DE10234785A1; GB2384117B

Abstract

The invention relates to a temperature controller, an electrical connector, and an electric water heater. The temperature controller is designed so as to avoid uninterrupted onoff of contact point on condition that there is no water inside a container, which brings following disadvantages that leads to shorten life of contact point, fire risk, and poor safety performance. The temperature controller comprises a body, a movable contact sheet, an electrical connecter, a bimetallic strip for sensing temperature, a push rod which is provided between the bimetallic strip and the movable contact sheet for disconnecting heating circuit when there is no water inside the container, a slider which is slidable on the movable contact sheet, a clip used for fixing the movable contact sheet, and an elastically pressing part which is elastically pressed on the slider. The electrical connector is formed by providing a contact electrode on the electrical connecter of the temperature controller. The electric water heater comprises a temperature controller, an electrical connector, a container, a base, and an electric heater provided inside the container. The electrical connector consists of an upper electrical connector on the container and a lower electrical connector which is connected with the upper electrical connector on the base. The electrical connector of the upper electrical connector is connected with the electric heater. The electric water heater has several advantages, such as long working life, and good safety performance. Furthermore, the contact electrode is not liable to be oxidized.

Description

Temperature controller, electric connector and electric water heater

The present invention relates to temperature control technology, and particularly to a temperature controller, an electric connector, and an electric water heater. Background technique

The thermostat is mainly used for temperature control. When the electric water heater is heated, when the water in the container is heated and dried, if it is not controlled, it will cause the container to be burned, which will seriously cause a fire. The structure of the existing temperature controller for controlling water heating includes a body, a moving contact piece, an electrical connection member, a temperature-sensitive bimetal piece, and a jack. The moving contact piece is in elastic contact with the electrical connection piece, and the two are connected in series in the power circuit during use. The ejector is located between the temperature-sensitive bimetal and the moving contact. When in use, the temperature-sensitive bimetal is placed on a heating surface, such as the wall of a container. When the water in the container is dried, the temperature of the wall surface in the container will continue to rise, which will cause the temperature-sensitive bimetal to move, and the temperature-sensitive bimetal will push the ejector rod at this time. Because the ejector pin is clamped between the temperature-sensitive bimetal and the moving contact piece, the force generated by the thermal deformation of the temperature-sensitive bimetal is greater than the elastic force of the moving contact piece. As a result, the moving contact piece is pushed apart to connect it electrically. The components are separated, thereby cutting off the power supply circuit, shutting off the electric heater and stopping heating, so as to achieve the purpose of temperature control. Its disadvantages are: when the electric heater is powered off, the temperature of the wall surface of the container is reduced, the temperature-sensitive bimetal is restored, and the ejector rod is also reset under the action of the elasticity of the moving contact piece, so that the moving contact piece and the electrical connection piece Contact, the power circuit is turned on, which causes the electric heater to be re-energized to generate heat. This cycle will cause the electric water heater to be continuously turned on and off in the absence of water. This not only reduces the contact between the moving contact piece and the electrical connection piece. The long contact life between the two sides will cause damage to the contacts. Once the contacts are fused together, it will cause a fire. Installation in electrical products will cause electrical products to be unsafe.

The electrical connector mainly realizes the electrical connection in the electrical product. In some electrical products that need to be divided into two parts to bring convenience to the user, the quality of the electrical connector directly affects the quality of the electrical product. The existing electrical connector structure includes a body, an electrode connected to a power source, and an electrical connector connected to an electronic component inside the appliance. The electrode and the electrical connector are connected inside the body. The electric connector used in the electric water heater has a temperature control structure, which not only realizes the electrical connection, but also prevents the electric water heater from overheating and preventing burning, and has a compact structure and saves material. Its structure includes a body, a movable contact piece, an electrical connection piece, an electrode, a temperature-sensitive bimetal piece, and a jack. The difference from the above-mentioned temperature controller is that the electrode and the electrical connection member therein are connected inside the body. The electrode is mainly used to connect with the electrode of another matching electrical connector. The problems when it is installed in electrical products, such as in electric water heaters, are as described above. Electric water heaters are mainly used to heat liquids. Its structure includes a container holding water, a base supporting the container, an electric heater at the bottom of the container, and an electrical connector between the container and the base. The electrical connector installed at the bottom of the container, such as the above-mentioned electrical connector, is installed in an electric water heater for use. The existing problems are as described in the previous household f. · Summary of the invention

The purpose of the present invention is to provide a temperature controller with a temperature-sensitive bimetal that can be automatically reset when the contacts are disconnected, but can be reset manually, and the temperature control is safe.

Another object of the present invention is to provide a temperature-sensitive bimetal sheet which is heated, and the contacts cannot be automatically reset when the contacts are disconnected, but can be reset manually, and the temperature control safe electrical connector.

It is still another object of the present invention to provide an electric water heater with a temperature-sensitive bimetal heating action, which cannot be automatically reset when the contacts are disconnected, but can be reset manually, and the temperature is controlled safely.

In order to achieve the above-mentioned object of the present invention, the solution of the present invention is to provide a temperature controller, which includes a body, a moving contact piece, and an electrical connection member. The dry-burning control ejector rod between the warm bimetal sheet and the moving contact piece, the moving contact piece is normally pressed on the electrical connection piece, and a sliding member is provided in the body, and the elastic pressing piece is pressed on the sliding piece. A clip stuck on a moving contact.

In the temperature controller, a clamping part is provided on the clamping part of the temperature controller, which can clamp the moving contact piece. '

'' In the temperature controller, the clamping member is provided with a jacking portion that touches the sliding member to spring open and separate the holding portion from the moving contact piece.

'The said temperature controller has a top on the sliding member.

An electrical connector includes a body, a movable contact piece, an electrical connection piece, two contact electrodes connected to the electrical connection piece, a temperature-sensitive bimetal piece that can be placed on a heating surface, and is disposed between the temperature-sensitive bimetal piece and The dry-fire control ejector rod between the moving contacts is normally pressed on the electrical connection piece, and the body is provided with a sliding member, an elastic pressing member pressed on the sliding member, and a card that can be caught on the moving contact piece. Pieces.

In the electrical connector, a clamping part is provided on a clamping part of the electrical connector, which can clamp the moving contact piece.

In the electrical connector, the clamping member is provided with a jacking portion that contacts the sliding member and springs off and separates the holding portion from the movable contact piece. '

The electrical connector has a top portion disposed on the body and a slot into which the lower electrical connector can be placed.

In the electrical connector, the groove is a ring structure, and the two contact electrodes are a ring structure provided in the groove. An electric water heater includes a container and a base, and an electric heater provided on the container. The container and the base are provided with a mating power-on connector, a power-down connector, and the power-on connector. It is provided with a body, a movable contact piece, an electrical connection piece connected to the electric heater, two contact electrodes connected to the electrical connection piece and pluggable with the lower electrical connector, and a temperature-sensitive bimetal piece attached to the heating surface of the container. The dry-fire control ejector rod disposed between the temperature-sensitive bimetal sheet and the moving contact piece, the moving contact piece is normally pressed against the electrical connector, and the body is provided with a sliding member, an elastic pressing member pressed against the sliding member, and A clip that can be caught on the moving contact. '

In the electric water heater, the clamping member is provided with a jacking portion that contacts the sliding member and springs off and separates the holding portion from the moving contact piece. '

In the electric water heater, a top of the sliding part is provided on the lower electrical connector.

The top of the electric water heater is provided on the body and is a slot into which the lower electrical connector can be placed. In the electric water heater, the groove is a ring structure, and the two contact electrodes are a ring structure provided in the groove.

The present invention adds a sliding member, a clamping member, and an elastic member to the temperature controller body of the existing structure. When the temperature-sensitive bimetal is heated, it will push the dry-fire control ejector rod to drive the moving contact, so that the moving contact is separated from the electrical connection, and at the same time, the moving contact is caught by the clamp, even if the temperature-sensitive bimetal is The temperature drops to reset, and the moving contact cannot reset. A force is applied on the sliding member to cause the sliding member to push the card member outwards during the movement, so that the card member is separated from the moving contact piece, so that the moving contact piece is reset and comes into contact with the electrical connection piece.

In the present invention, a sliding member, a clamping member, and an elastic member are added to the electrical connector body of the existing structure. When the temperature-sensitive bimetal is heated, it will push the dry-fire control ejector rod to drive the moving contact, so that the moving contact is separated from the electrical connection, and at the same time, the moving contact is caught by the clamp, even if the temperature-sensitive bimetal is The temperature drops to reset, and the moving contact cannot reset. When another electrical connector is inserted into the electrical connector, the other electrical connector will touch the slider, so that the slider pushes the card member outwards during the plugging process, and separates the card member from the moving contact piece. Reset the moving contact and make contact with the electrical connection.

The present invention adds a sliding member, a clamping member, and an elastic member to the electric connector body of the electric water heater with the existing structure. When the water in the container is dried, the temperature of the surface of the container rises, and when the temperature-sensitive bimetal is heated, the dry contact is pushed to drive the moving contact to separate the moving contact from the electrical connection. At the same time, the moving contact piece is caught by the clip. Even if the temperature on the container is lowered and the temperature-sensitive bimetal is reset, the moving contact cannot be reset. When the container is repositioned on the base or the electrical connector on the base is inserted into the electrical connector, the base or the electrical connector on the base will trigger the slider, so that the slider pushes the card outward during the plugging process. Separating the card member from the moving contact piece to reset the moving contact piece. In this way, if the water in the container is dried up, as long as the user does not Go to pick up the container, no matter how long, the moving contact and electrical connection will always remain separated, so that the electric heater will not be heated. Only when the user picks up the container and refills it with water, and then places it on the base, that is, the container is separated from the base, the moving contact piece and the electrical connector will be contacted again, preventing the container from moving under the dry burning state. The defect that the contacts and electrical connections frequently operate. Brief description of the drawings.

Figure 1 is a structural view of the contact surface of the thermostat;

FIG. 2 is a sectional view taken along A-A of FIG. 1;

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

'Figure 4 is a right side view of Figure 2 with the metal cover and the upper cover removed;-Figure 5 is a view of the internal three-dimensional structure of the temperature controller after the body is removed;

6 is a view of the internal three-dimensional structure viewed from another angle after the temperature controller is removed;

7 is a partially enlarged view of FIG. 6;

FIG. 8 is a plug surface view of the electrical connector;

'FIG. 9 is a cross-sectional view taken along C_C of FIG. 8;

10 is a sectional view taken along the line D-D of FIG. 8;

FIG. 11 is an internal three-dimensional structure view of the electrical connector after removing the body; FIG.

FIG. 12 is an internal three-dimensional structural view of the electrical connector viewed from another angle after the body is removed; FIG.

FIG. 13 is a structural view of an electric heating ice appliance;

FIG. 14 is a partially enlarged view of FIG. 13. detailed description

First, the temperature controller is described. As shown in FIG. 1-7, the temperature controller described in this embodiment includes a main body 1, a moving contact piece 4, an electrical connection member 7, a temperature-sensitive bimetal piece 10, and a dry-fire control ejector. 11, the sliding member 15, the clamping member 20, and the elastic member 21.

The sliding member 15 can slide in the body 1. The movable contact piece 4 and the electrical connection piece 7 are normally in elastic contact. One end of the elastic member 21 is fixed in the main body 1, and the other end is elastically pressed on the sliding member 15. The elastic force of the elastic member 21 is greater than the elastic force of the moving contact piece. After the elastic member 21 is on the slider 15, the slider 15 will move the

The sheet ⁴ is lifted up and separated from the electrical connection member 7. The clamping member 20 is provided with a clamping portion 24 capable of clamping the movable contact piece 4. When the edge of the movable contact piece 4 is pushed to the holding portion 24 on the clamping member 20 by the dry-fire control lever 11, it can be The holding portion 24 is stuck. Since the moving contact piece 4 moves together with the temperature-sensitive bimetal piece 10 and the dry-fire control ejector pin 11, the clamping member 20 can be provided with a sliding member 15 to spring open and hold the holding portion 24 and the moving contact. The sheet 4 is separated from the raised portion 23.

The main body 1 is provided with a metal cover 12. The metal cover 12 is provided with a spring piece 19 fixed by a fuse fastener 17. The other end of the spring piece 19 is fixed on the metal cover 12 by a fixing member 18. The melting point temperature of the fusible fastener 17 is higher than the heating action temperature of the temperature-sensitive bimetal sheet 10. A fuse control ejector '16 is provided between the elastic sheet 19 and the movable contact sheet 6, and the movable contact sheet 6 and the electrical connection member 7 are normally pressed. contact. When the temperature on the metal cover 12 rises to the melting point temperature of the fusible fastener 17, the fusible fastener 17 melts, the elastic piece 19 springs down, pushes the fusing control ejector 16, and lifts the movable contact 6 Separate from the electrical connection member 7 to ensure that the power circuit between the moving contact piece 6 and the electrical connection member 7 is cut off in the event that the dry-burn protection structure controlled by the temperature-sensitive bimetallic piece 10 fails to achieve double protection. When in use, as long as the moving contacts 4, 6 and the electrical connector 7 are connected in series in the power circuit, the temperature can be used to control the power on and off in the circuit.

'Next describe the electrical connector, as shown in Figure 8-12, and refer to Figures 1-7. The electrical connector described in this embodiment includes a body 1 made of plastic, two moving contact pieces 4 made of metal copper sheets, two electrical connection pieces 7 made of metal copper sheets, and two copper sheets. The made contact electrodes 2, 3, a temperature-sensitive bimetal sheet 10, a dry firing control rod 11, a grounding electrode 13, a plastic sliding member 15, a metal sheet stamping card 20, a The elastic member 21 made by bending the metal rod.

The sliding member 15 can slide in the body 1. The movable contact piece 4 and the electrical connecting piece 7 are normally in elastic contact. One end of the elastic member 21 is fixed in the main body 1, and the other end is elastically pressed on the sliding member 15. The elastic force of the elastic member 21 is greater than the elastic force of the movable contact piece 4. After the elastic member 21 is elastically pressed against the sliding member 15, the sliding member 15 will push up the movable contact piece 4 and separate it from the electrical connecting member 7. The clamping member 20 is provided with a clamping portion 24 capable of clamping the movable contact piece 4. When the movable contact piece 4 moves to the holding portion 24 on the clamping member 20, it can be caught by the holding portion 24. The clamping member 20 is provided with a pushing-up portion 23 that is springed to contact the sliding member 15 and separates the holding portion 24 from the movable contact piece 4. The contact electrodes 2 and 3 are concentric ring structures fixedly arranged on the body 1 and are connected to the moving contact piece 4. The sliding member 15 is provided with a top portion 27 in a circular groove beside the contact electrodes 2 and 3. When the electrical connector according to the present invention is mated with another electrical connector that is used with it, the top 27 will be touched by the other electrical connector to move the slider 15 upward, and the 'moving contact piece 4 is connected to the electrical connector. The connecting member 7 is in contact and is in a conducting state in the circuit. When the temperature-sensitive bimetal 10 is warped due to heat, the moving contact piece 4 will be pushed up by the dry burning control pin 11 and separated from the electrical connection member 7, and will be disconnected in the circuit. The moving contact piece 4 will be caught by the holding portion 24 on the clamping member 20, and even if the temperature-sensitive bimetal piece 10 is cooled and reset, the moving contact piece 4 will not contact the electrical connector 7. Until the two electrical connectors Separation, that is, manually, in this way, the sliding member 15 moves downward due to the loss of the force exerted by the electrical connector on the top 27, and simultaneously pushes the jacking portion 23 of the card member 20, so that the card member 20 is pushed up to the side Until the holding portion 24 is separated from the movable contact piece 4, so that the movable contact piece 4 is in contact with the electrical connection member 7 again.

In addition, before the electrical connector is plugged into another electrical connector that is matched with the electrical connector, the sliding member can lift the moving contact piece to separate it from the electrical connecting member. After the electrode contacts, apply it on the sliding member. After one action, make it slide, let the moving contact bounce back to contact the electrical connector, and connect the power circuit. Before the electrodes of the electrical connector are separated, the slider is automatically slid, the moving contact is lifted up to separate it from the electrical connector, and finally the electrodes are separated. Because the silver contact is provided on the contact point between the moving contact piece and the electrical connection piece, the silver contact has good oxidation resistance, avoids arcing due to electrode contact, greatly improves service life, and has good electrical performance.

The main body 1 is provided with a metal cover 12. The metal cover 12 is provided with a spring piece 19 fixed by a fuse fastener 17. The other end of the spring piece 19 is fixed on the metal cover 12 by a fixing member 18. The melting point temperature of the fusible fastener 17 is higher than the heating action temperature of the temperature-sensitive bimetal sheet 10. A fuse control ejector 16 is provided between the elastic piece 19 and the movable contact piece 6, and the movable contact piece 6 and the electrical connection member 7 are normally in elastic contact with each other. . When the temperature on the metal cover 12 rises to the melting point temperature of the fusible fastener 17, the fusible fastener 17 melts, the elastic piece 19 springs down, pushes the fusing control ejector 16, and lifts the movable contact 6 Separate from the electrical connection member 7 to ensure that the power circuit between the moving contact piece 6 and the electrical connection member 7 is cut off in the event that the thousand-burn protection structure controlled by the temperature-sensitive bimetal piece 10 fails, thereby achieving a double protection effect. When in use, as long as the moving contacts 4 and 6 and the electrical connection piece 7 are connected in series in the power circuit, the on / off of the power in the circuit can be controlled by the temperature.

The electric connector according to the present invention is installed in an electric water heater. When the water in the electric water heater is dried, the temperature-sensitive bimetal 10 will be heated to disconnect the power supply, and it will not be reset in the future. Until the manual reset, the electric water heater will not be turned on and off. And once the dry-burning protection structure controlled by the temperature-sensitive bimetal sheet 10 fails, the fusing control ejector pin 16 will safely lift the movable contact sheet 6 when it reaches the set temperature, and separate it from the electrical connection member 7, 'effective The ground water heater protects the electric water heater, thereby avoiding damage to the electric water heater and increasing the safety of the electric appliance. ,

Next, an electric water heater is introduced, as shown in FIGS. 13 to 14, and reference is made to FIGS. 1 to 12. The electric water heater according to the present invention includes a container 28, a base 29, an electric heater 30, a power-on connector 31, and a power-down connector 32. The power-on connector 31 is the electrical connector according to the present invention. "'The specific structure and working principle will not be repeated here.

The sliding member 15 in the power-on connector 31 may be provided with a top 27 that can be placed on the base 29.

The sliding member 15 may also be provided with a top portion 27 which can be placed on the lower electrical connector 32 on the bottom of the base 29. The contact electrodes 2 and 3 are circular knots fixed on the body 1 and are disposed in the circular groove 33. The top 27 of the slider 15 is disposed in the circular groove 33 next to the contact electrodes 2 and 3. The lower power connector 32 is provided. There is a circular convex ring 34 that can be inserted into the circular groove 33. '

The top 27 of the slider 15 is disposed on the body 1 and is a circular groove 33 into which the lower electrical connector 32 can be placed. '

When the container 28 is placed on the base 29, no matter the top portion 27 is subjected to upward force from the base 29, the lower electrical connector 32, and the annular convex ring 34, the movable contact piece 4 is in contact with the electrical connector 7, and the electric heater 30 is in When the water in the container is dried, the temperature-sensitive bimetallic sheet 10 will be heated and the power will be disconnected. The electric heater 30 will be turned off to stop dry burning until the container 28 is picked up. The electrical connector 7 is reset and contacted again, and the electric water heater can be used again with fresh water. In the dry burning state, it not only increases the safety of the appliance, but also resets naturally during use, which is easy to use. Since the top portion 27 is disposed in the groove 33, it cannot be touched by a finger, and neither the contact electrodes 2, 3, nor the top portion 27 can be reached. Even if the contact electrodes 2, 3 are reached, as long as the top portion 27 is not pressed, the contact electrode 2 , 3 will not be charged, which greatly improves the safety performance of electrical appliances. It has the advantages that the contact electrode is not easy to oxidize, the product has a long service life, and the electrical appliance has good safety.

Claims

Rights request

1. A temperature controller, comprising a main body (1), a movable contact piece (4), an electrical connection member (7), a temperature-sensitive bimetal piece (1Q) that can be placed on a heating surface, and is disposed on the temperature-sensitive double The dry-fire control ejector pin (11) between the metal piece (10) and the moving contact piece (4) is characterized in that the moving contact piece (4) is normally pressed against the electrical connection piece (7), and the body ( 1) A sliding member (15) is provided therein, an elastic member (21) that is pressed against the sliding member (15), and a clamping member (20) that can be clamped on the movable contact piece (4).

2. The thermostat according to claim 1, characterized in that the clamping member (20) is provided with a holding portion (24) that can hold the movable contact piece (4). '·

3. The thermostat according to claim 2, characterized in that the clamping member (20) is provided with an access sliding member

(15) and the jack (23) which pops up and separates the holding portion (24) from the moving contact piece (4).

4. The thermostat according to claim 1, 2 or 3, characterized in that the sliding member (15) is provided with a top (27).

5. —An electrical connector including a body (1), a movable contact piece (4 ·), an electrical connector (7), and a contact electrode (2), (3) connected to the electrical connector (7), ' Temperature-sensitive bimetal (10) that can be placed on the heating surface

'' The dry-fire control ejector pin (11) between the temperature-sensitive bimetal piece (10) and the moving contact piece (4) is characterized in that the moving contact piece (4) is normally pressed against the electrical connector (7) The main body (1) is provided with a sliding member (15), an elastic pressing member (21) which is pressed against the sliding member (15), and a clamping member (20) which can be clamped on the movable contact piece (4).

6. The electrical connector according to claim 5, characterized in that the clamping member (20) is provided with a holding portion (24) that can hold the movable contact piece (4). '

7. The electrical connector according to claim 6, characterized in that the clamping member (20) is provided with a contacting member (15) to spring open and hold the clamping portion (24) and the movable contact piece ( 4) The separated jacking portion (23).

The electrical connector according to claim 7, characterized in that the top (27) is disposed on the body (1) and is a slot (33) into which the lower electrical connector (32) can be placed. '

9. The electrical connector according to claim 8, characterized in that the groove (33) is a ring structure, and the contact electrodes (2), (3) are a circle located in the groove (33) structure.

10. An electric water heater comprising a container (28) and a base (29), an electric heater (30) provided on the container (28), and a matching connection is provided on the container (28) and the base (29) The plugged-in power-on connector (31) and the power-down connector (32.), the power-on connector '(31) is provided with a body (, a moving contact piece (4), and is connected to the electric heater (3). Electrical connector (7), which is connected to the electrical connector (7) and can be plugged with the power-down connector (32)

8

Replacement page (Article 26) Contact electrodes (2), (3), and a temperature-sensitive bimetal (10) attached to the heating surface of the container (28), disposed between the temperature-sensitive bimetal (10) and the moving contact (4) The dry burning control ejector rod (11) is characterized in that the moving contact piece (4) is normally pressed on the electrical connection member (7), and a sliding member (15) is provided in the body (1), and is pressed. An elastic member (21) on the sliding member (15), and a clamping member (20) that can be clamped on the movable contact piece (4).

11. The electric water heater according to claim 10, characterized in that the clamping member (20) is provided with a sliding member (15) to spring open and hold the clamping portion (24) and the moving contact piece (4). ) Separate jack (23).

12. The electric water heater according to claim 10, characterized in that the sliding member (15) is provided with a top (27) which is placed on the lower electrical connector (32).

13. The electric water heater according to claim 12, characterized in that the top portion (27) is disposed on the body (1) and is a slot (33) into which the lower electrical connector (32) can be placed.

14. The electric water heater according to claim 13, characterized in that the groove (33) is a ring structure, and the contact electrodes (2), (3) are a ring structure provided in the groove (33) .

9

Replace 1 "(Article 26)