CN110993437A

CN110993437A - Low-resistance bimetal temperature controller

Info

Publication number: CN110993437A
Application number: CN201911294151.1A
Authority: CN
Inventors: 庄士春
Original assignee: PACIFIC ELECTRONIC (KUNSHAN) CO Ltd
Current assignee: PACIFIC ELECTRONIC (KUNSHAN) CO Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-04-10

Abstract

The invention discloses a low-resistance bimetal temperature controller, which comprises: the metal elastic piece assembly comprises a stator and an elastic piece, one end of the stator is provided with a stator contact, the other end of the stator is fixed at the bottom of the base, one end of the elastic piece is provided with an elastic piece contact, the other end of the elastic piece is fixed at the bottom of the base, a push rod is fixed on the base, one end of the push rod pushes a disc in the vertical direction, and the other end of the push rod pushes the elastic piece; the elastic sheet and the elastic sheet contact are fixed through welding, and the static sheet contact are fixed through welding. The invention avoids unstable contact and unstable resistance caused by riveting, simplifies the contact structure and has low cost; the contact adopts three-layer composite structure, has effectually improved the weldability, is favorable to welding on the substrate of still and shell fragment.

Description

Low-resistance bimetal temperature controller

Technical Field

The invention belongs to the field of temperature controllers, and particularly relates to a low-resistance bimetallic temperature controller.

Background

The temperature controller is a series of automatic control elements which are physically deformed in a switch according to the temperature change of a working environment, thereby generating certain special effects and generating on or off actions. The bimetal temperature controller is a kick type temperature controller, the principle is that a bimetal sheet after temperature setting is used as a heat sensitive reaction component, heat generated when the temperature of a main part of a product rises is transferred to a bimetal wafer, the bimetal wafer rapidly acts when the temperature reaches an action temperature setting, and a contact is opened or closed under the action of a mechanism; when the temperature is reduced to the reset temperature, the bimetallic strip is rapidly restored to the original state, so that the contact is closed or disconnected, the purpose of connecting or disconnecting the circuit is achieved, and the circuit is controlled. The bimetal temperature controller can be applied to various working environments, so that the waterproof and explosion-proof bimetal temperature controller is widely applied.

The large-current bimetal temperature controller used in the current market has large and unstable contact resistance, and the resistance value is easy to change; the production process is complex, and the speed is low due to manual operation through a contact riveting process; as shown in fig. 1 and 2, the contact on the metal elastic sheet assembly is riveted, the riveting state is not easy to control, and a gap is easily generated between the riveting process contact and the substrate, so that the contact property and the resistance are unstable; riveting impression is easily generated on the surface of the appearance riveting contact, contact is influenced, and the cost is higher.

Disclosure of Invention

Aiming at the problems, the invention provides the low-resistance bimetal temperature controller which is stable in contact resistance, capable of adopting an automatic welding process, high in speed and low in cost.

In order to achieve the purpose, the invention adopts the technical scheme that:

a low resistance bimetallic thermostat comprising: the metal elastic piece assembly comprises a stator and an elastic piece, one end of the stator is provided with a stator contact, the other end of the stator is fixed at the bottom of the base, one end of the elastic piece is provided with an elastic piece contact, the other end of the elastic piece is fixed at the bottom of the base, a push rod is fixed on the base, one end of the push rod pushes a disc in the vertical direction, and the other end of the push rod pushes the elastic piece; the elastic sheet and the elastic sheet contact are fixed through welding, and the static sheet contact are fixed through welding.

Preferably, the elastic sheet contact is in contact with the still contact at normal temperature, and the disc is deformed at high temperature and is pressed against the elastic sheet through the ejector rod, so that the elastic sheet contact is separated from the still contact.

The optimization effect brought by the optimization scheme is that when the temperature of the temperature controller reaches the temperature required by the set value, the disc instantaneously acts to push the ejector rod to downwards disconnect the static sheet contact and the elastic sheet contact, when the temperature reaches the reset value temperature, the disc instantaneously acts again, the ejector rod upwards connects the static sheet contact and the elastic sheet contact, and the heating device heats again.

Preferably, the expansion coefficient of the disc is greater than that of the metal dome assembly.

Preferably, the static sheet and the elastic sheet are both fixedly connected with the base through rivets.

Preferably, the still contact and the spring contact both comprise three-layer composite structures, namely a silver surface layer, a C1020 oxygen-free copper interlayer and a nickel surface layer in sequence.

The optimization effect that this optimization scheme brought is that the three-layer composite construction has effectually improved the weldability, is favorable to welding on the substrate of still and shell fragment, and the convenience automatic weld contact when the substrate shaping, raises the efficiency, has improved product property ability.

Preferably, the still and the elastic sheet are respectively connected with the conducting point terminal.

Compared with the prior art, the invention has the beneficial effects that:

1. the low-resistance bimetal temperature controller adopts the mode of welding the static sheet and the static sheet contact, and welding the elastic sheet and the elastic sheet contact, so that unstable contact and unstable resistance caused by riveting are avoided, the contact structure is simplified, and the cost is low.

2. The contact of the low-resistance bimetal temperature controller disclosed by the invention adopts a three-layer composite structure, integrates the advantages of metal materials and semiconductor materials, effectively improves the weldability, is beneficial to welding on the substrates of the still piece and the elastic piece, is convenient for automatically welding the contact when the substrates are formed, improves the efficiency and improves the product performance.

Drawings

Fig. 1 is a schematic view of a riveting spring structure in the background art.

FIG. 2 is a schematic view of a riveting contact structure according to the background art

Fig. 3 is a sectional view of a low resistance bimetal thermostat according to the present invention.

Fig. 4 is a schematic diagram of the contact material structure according to the present invention.

Fig. 5 is a spring structure according to the present invention.

01, riveting a contact; 02. ag; 03. cu; 04. a spring plate;

1. a housing; 2. an end cap; 3. a base; 4. a still sheet; 5. a stationary contact; 6. a spring plate; 7. a spring contact; 8. a top rod; 9. a disc; 10. riveting; 11. a conductive point terminal; 12. a silver surface layer; 13. c1020 oxygen-free copper interlayer; 14. a nickel surface layer.

Detailed Description

For a better understanding of the present invention, the contents of the present invention will be further explained below with reference to the drawings and examples, but the present invention is not limited to the following examples.

Examples

In the description of the present invention, it is to be understood that all the orientations or positional relationships indicated by the terms "upper", "lower", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only intended to facilitate the description of the present invention and to simplify the description, and do not indicate or imply that the components referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, are not to be construed as limiting the present invention.

As shown in fig. 3 and 4, a low resistance bimetal thermostat includes: casing 1, end cover 2, base 3 and metal shrapnel subassembly, casing 1 covers in 3 one ends of base, and end cover 2 covers in 3 other ends of base. The metal shrapnel component comprises a still 4 and a shrapnel 6, wherein one end of the still 4 is provided with a still contact 5, and the other end is fixed at the bottom of the base 3. One end of the elastic sheet 6 is provided with an elastic sheet contact 7, and the other end is fixed at the bottom of the base 3. A top rod 8 is fixed on the base 3, one end of the top rod 8 in the vertical direction is pressed against a disc 9, and the other end is pressed against the elastic sheet 6. The elastic sheet 6 and the elastic sheet contact 7 are fixed by welding, and the static sheet 4 and the static sheet contact 5 are fixed by welding.

In this embodiment, as shown in fig. 5, the stationary contact 5 and the spring contact 7 both include a three-layer composite structure, which includes a silver surface layer 12, a C1020 oxygen-free copper interlayer 13, and a nickel surface layer 14 in this order. The composite structure effectively improves the weldability of the contact, is favorable for welding on the substrate of the still and the elastic sheet, and facilitates automatic welding of the contact when the substrate is formed.

At normal temperature, the elastic sheet contact 7 is in contact with the static sheet contact 5, at high temperature, the disc 9 is deformed and pushes the elastic sheet 6 through the ejector rod 8, and the elastic sheet contact 7 is separated from the static sheet contact 5. The expansion coefficient of the disc 9 is larger than that of the metal dome assembly. The static sheet 4 and the elastic sheet 6 are both fixedly connected with the base 3 through rivets 10. The static sheet 4 and the elastic sheet 6 are respectively connected with a conductive terminal.

When the low-resistance bimetal temperature controller described in this embodiment is used, when the temperature reaches the temperature required by the set value, the disc 9 instantaneously acts to push the ejector rod 8 to move downward to disconnect the static sheet contact 5 and the elastic sheet contact 7, when the temperature reaches the reset value temperature through cooling, the disc 9 instantaneously acts again, the ejector rod 8 moves upward, the static sheet contact 5 and the elastic sheet contact 7 are connected, and the heating device heats again.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A low resistance bimetallic thermostat, comprising: the metal elastic piece assembly comprises a stator and an elastic piece, one end of the stator is provided with a stator contact, the other end of the stator is fixed at the bottom of the base, one end of the elastic piece is provided with an elastic piece contact, the other end of the elastic piece is fixed at the bottom of the base, a push rod is fixed on the base, one end of the push rod pushes a disc in the vertical direction, and the other end of the push rod pushes the elastic piece; the elastic sheet and the elastic sheet contact are fixed through welding, and the static sheet contact are fixed through welding.

2. The bimetal temperature controller of claim 1, wherein the spring contact is in contact with the stator contact at room temperature, and the disc is deformed at high temperature by the push rod pressing against the spring, so that the spring contact is separated from the stator contact.

3. The bimetal thermostat of claim 1, wherein the expansion coefficient of the disc is greater than the expansion coefficient of the metal dome assembly.

4. The bimetal temperature controller of claim 1, wherein the stator and the spring are both fixedly connected to the base by rivets.

5. The low-resistance bimetal temperature controller according to claim 1, wherein the static sheet contact and the spring sheet contact both comprise a three-layer composite structure comprising a silver surface layer, a C1020 oxygen-free copper interlayer and a nickel surface layer in sequence.

6. The bimetal thermostat of claim 1, wherein the stator and the spring plate are respectively connected with a conductive terminal.