Double-disc double-contact temperature control protection combined temperature controller

Abstract

The utility model provides a double-disc double-contact temperature control protection combined temperature controller, which comprises a shell and a rear cover arranged below the shell, a partition plate is arranged in the shell and divides the inner space of the shell into an upper part and a lower part, and the upper part and the lower part of the shell are connected through a connecting rod. A disposable disc and an automatic reset disc are arranged in a first cavity defined by the rear cover and the lower portion of the shell, the automatic reset disc and the disposable disc are longitudinally arranged in a staggered mode, and the middle of the disposable disc and the middle of the automatic reset disc protrude towards the rear cover in the initial state. According to the double-disc double-contact temperature control protection combined temperature controller provided by the utility model, the disposable movable contact piece and the automatic reset movable contact piece do not interfere with each other during working through the long ejector rod and the short ejector rod, and the automatic reset movable contact piece, the static contact piece and the disposable movable contact piece are arranged in a Z shape through the static contact piece, so that the space area is saved, and the working efficiency is improved. And the space utilization efficiency in the temperature controller is improved.

Description

Technical Field

[0001] This utility model relates to the field of temperature controller technology, specifically to a dual-disc, dual-contact temperature control and protection combined temperature controller. Background Technology

[0002] Existing disc bimetallic temperature controllers have several drawbacks. They may fail after exceeding their design lifespan, for example, the contacts may become stuck and unable to disconnect after copper leakage, the disc temperature may drift beyond the initial range, the disc may not deform, and the circuit cannot be cut off, causing the controlled heater to continuously heat, posing a significant safety hazard. To address these issues, patent document CN106653477B discloses a dual-protection disc bimetallic temperature controller. This controller uses two disc bimetallic strips for protection; if the main strip fails, the secondary strip serves as a backup, thus enhancing the controller's safety and stability. However, this device connects the two strips via a push rod, which may cause interference, and its internal structure is complex, requiring further optimization to improve reliability and simplify the structure. Utility Model Content

[0003] This utility model provides a dual-disc dual-contact temperature control and protection combination thermostat to solve the problems of mutual interference between the bimetallic strips in the thermostat and the complex internal structure of the thermostat in the prior art.

[0004] To achieve the above objectives, the present invention adopts the following technical solution: a dual-disc dual-contact temperature control and protection combination thermostat, comprising a housing and a rear cover disposed below the housing, wherein a partition is disposed inside the housing, dividing the internal space of the housing into two parts vertically, and a disposable disc and an automatic reset disc are disposed in the first cavity formed by the rear cover and the lower part of the housing, wherein the automatic reset disc and the disposable disc are arranged longitudinally in a staggered manner, and the middle part of the disposable disc and the automatic reset disc protrudes towards the rear cover in the initial state, wherein the disposable disc can only switch from the initial state to the triggered state, and the automatic reset disc switches between the initial state and the triggered state, wherein neither the disposable disc nor the automatic reset disc can change its spatial position to produce displacement or rotation, wherein the disposable disc and the automatic reset disc are made of two metal materials with different coefficients of thermal expansion bonded together, and the set temperature for the sudden jump of the disposable disc is greater than the set temperature for the sudden jump of the automatic reset disc;

[0005] A cover is detachably provided on the top of the housing. A static contact, a disposable moving contact, and an automatic reset moving contact are provided in the second cavity formed by the cover and the upper part of the housing. The static contact is fixedly provided in the second cavity. The disposable moving contact and the automatic reset moving contact extend out of the housing from the center and are used to connect to the external circuit.

[0006] The stationary contact includes a connecting part, a first abutting part, and a second abutting part. The connecting part is disposed between the first abutting part and the second abutting part. A first mounting hole is provided on the stationary contact, which is disposed through the connecting part and extends to the second abutting part. The first abutting part and the second abutting part are parallel to each other.

[0007] A long push rod is provided between the automatic reset moving contact and the automatic reset disc, and a short push rod is provided between the disposable moving contact and the disposable disc. A first limiting hole is provided through the partition to allow the short push rod and the long push rod to move up and down, and a second limiting hole is provided through the disposable disc to allow the long push rod to move up and down.

[0008] Furthermore, the bottom of the partition is provided with multiple protrusions at equal intervals around the central axis of the disposable disc, and the disposable disc is provided with mounting holes for the protrusions to pass through. The automatic reset disc is located between the protrusions and the back cover.

[0009] Furthermore, the cap and the housing are secured together by double-headed stepped rivets.

[0010] Furthermore, the contact surfaces of the stationary contact and the disposable moving contact are silver-plated.

[0011] Furthermore, the stationary contact piece is formed by machining a straight sheet metal plate to form a connecting part, a first abutting part, and a second abutting part.

[0012] The beneficial effects of this utility model are as follows:

[0013] The dual-disc, dual-contact temperature control and protection combination thermostat provided by this utility model, through the setting of long and short push rods, ensures that the disposable moving contact and the automatic reset moving contact do not interfere with each other when working. Furthermore, through the setting of stationary contact, the automatic reset moving contact, stationary contact, and disposable moving contact are arranged in a "Z" shape, saving space and improving the space utilization efficiency within the thermostat. Attached Figure Description

[0014] Figure 1 This is an exploded view of the present invention;

[0015] Figure 2 This is a cross-sectional view of the present invention;

[0016] Figure 3 This is a schematic diagram of the structure of this utility model;

[0017] Figure 4 This is a schematic diagram of the static contact plate.

[0018] Figure 5 This is a schematic diagram of the connection structure between the stationary contact, the automatically reset moving contact, and the disposable moving contact.

[0019] Explanation of reference numerals in the attached figures:

[0020] 1. Housing; 2. Rear cover; 3. Partition; 4. Disposable disc; 5. Boss; 6. Automatic reset disc; 7. Cover; 8. Double-headed stepped rivet; 9. Stationary contact piece; 901. First abutment part; 902. Second abutment part; 903. Connecting part; 904. First mounting hole; 10. Disposable moving contact piece; 11. Automatic reset moving contact piece; 12. Short push rod; 13. Long push rod; 14. Second mounting hole; 15. First limiting hole; 16. Second limiting hole. Detailed Implementation

[0021] The specific embodiments of this application will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0022] like Figure 1-5 As shown, this utility model embodiment provides a dual-disc dual-contact temperature control and protection combination thermostat, including a housing 1 and a rear cover 2 disposed below the housing 1. A partition 3 is disposed inside the housing 1, which divides the internal space of the housing 1 into two parts vertically. A disposable disc 4 is disposed in the first cavity formed by the rear cover 2 and the lower part of the housing 1 (the disposable disc 4 protrudes towards the rear cover 2 in the initial state. Since the disposable disc 4 is made of two metal materials with different coefficients of thermal expansion, when heated and reaching a certain temperature, due to the different thermal expansion of the two metals, the disposable disc 4 will jump and deform into a triggered state that is away from the protrusion of the rear cover 2. The disposable disc 4 has various embodiments in the prior art. The specific structure and materials of the disposable disc 4 will not be described in detail here). The first cavity limits the disposable disc 4, so that the disposable disc 4 can only switch from the initial state to the triggered state, and cannot change its spatial position to produce displacement or rotation.

[0023] The bottom of the partition 3 is provided with multiple protrusions 5 at equal intervals around the central axis of the disposable disc 4, and the disposable disc 4 is provided with a second mounting hole 14 for the protrusions 5 to pass through. An automatic reset disc 6 is provided between the protrusions 5 and the back cover 2 (the middle part of the automatic reset disc 6 protrudes towards the back cover 2 in the initial state. Since the automatic reset disc 6 is made of two metal materials with different coefficients of thermal expansion, when heated and reaching a certain temperature, due to the different thermal expansion of the two metals, the automatic reset disc 6 will jump and deform into a triggered state that is away from the protrusion of the back cover 2. The automatic reset disc 6 has various embodiments in the prior art. The specific structure and materials of the automatic reset disc 6 will not be described in detail here). The protrusions 5 and the back cover 2 limit the automatic reset disc 6, so that the automatic reset disc 6 can only switch between the initial state and the triggered state, and cannot change its spatial position to produce displacement or rotation.

[0024] A cover 7 is detachably provided on the top of the housing 1 (in a specific embodiment, the cover 7 is fixed to the housing 1 by a double-headed stepped rivet 8). A static contact 9, a disposable moving contact 10 and an automatic reset moving contact 11 are provided in the second cavity formed by the cover 7 and the upper part of the housing 1. The static contact 9 is fixedly provided in the second cavity. The disposable moving contact 10 and the automatic reset moving contact 11 extend out of the housing 1 away from the center and are used to connect to the external circuit.

[0025] The stationary contact 9 includes a connecting portion 903, a first abutting portion 901, and a second abutting portion 902. The connecting portion 903 is disposed between the first abutting portion 901 and the second abutting portion 902. A first mounting hole 904 is provided on the stationary contact 9. The first mounting hole 904 is disposed through the connecting portion 903 and extends to the second abutting portion 902. The first abutting portion 901 and the second abutting portion 902 are parallel to each other. When the bottom end of the disposable moving contact 10 near the center of the housing 1 abuts against the top of the first abutting portion 901, and the top of the second abutting portion 902 abuts against the bottom end of the automatic reset moving contact 11 near the center of the housing 1 at the same time, the internal circuit of the thermostat is connected.

[0026] When the disposable movable contact 10 passes through the first mounting hole 904 and abuts against the first abutting part 901, and the automatic reset movable contact 11 abuts against the second abutting part 902, the automatic reset movable contact 11, the stationary contact 9, and the disposable movable contact 10 are arranged in a "Z" shape (in a specific embodiment, the stationary contact 9 is formed by straight sheet metal processing to form the connecting part 903, the first abutting part 901, and the second abutting part 902).

[0027] A long push rod 13 is provided between the automatic reset moving contact 11 and the automatic reset disc 6. The automatic reset disc 6 is a resettable disc. When the thermostat detects that the temperature has reached the preset jump temperature, the automatic reset disc 6 will deform due to thermal expansion, pushing the long push rod 13 and the end of the automatic reset moving contact 11 that abuts against the stationary contact 9 to move upward, so that the automatic reset moving contact 11 is no longer in contact with the second abutment part 902, thereby disconnecting the internal circuit of the thermostat. When the temperature drops to a safe range, the automatic reset disc 6 will shrink due to cooling and return to its original state, causing the long push rod 13 and the automatic reset moving contact 11 to move downward, so that the automatic reset moving contact 11 and the second abutment part 902 abut against each other again, thereby restoring the internal circuit of the thermostat.

[0028] A short push rod 12 is provided between the disposable moving contact 10 and the disposable disc 4. When the disposable disc 4 bends and deforms, it pushes the short push rod 12 and the end of the disposable moving contact 10 that abuts against the stationary contact 9 to move upward, so that the disposable moving contact 10 no longer contacts the first abutment part 901, thereby disconnecting the circuit inside the thermostat. The disposable disc 4 is a non-reset disc, which is used to provide additional safety protection when the automatic reset disc 6 fails. Because the set temperature for the disposable disc 4 to jump is higher than the set temperature for the automatic reset disc 6 to jump, the disposable disc 4 will not jump simultaneously or jump prematurely when the automatic reset disc 6 jumps. When the automatic reset disc 6 fails to disconnect the circuit at the predetermined temperature due to a fault or other reasons, the disposable disc 4 will jump at a higher temperature to ensure that the circuit is disconnected and to permanently disconnect the circuit inside the thermostat to prevent the equipment from overheating.

[0029] The partition 3 has a first limiting hole 15 through which the short push rod 12 and the long push rod 13 move up and down, and the disposable disc 4 has a second limiting hole 16 through which the long push rod 13 moves up and down.

[0030] Considering the high cost of silver contacts, in order to reduce the use of silver contacts and lower the cost of the thermostat, in a preferred embodiment of this utility model, the contact surfaces of the stationary contact 9 and the disposable moving contact 10 are plated with silver.

[0031] In summary, this dual-disc dual-contact temperature control and protection combination thermostat, through the setting of the long push rod 13 and the short push rod 12, ensures that the disposable moving contact 10 and the automatic reset moving contact 11 do not interfere with each other during operation. Furthermore, through the setting of the stationary contact 9, the automatic reset moving contact 11, the stationary contact 9, and the disposable moving contact 10 are arranged in a "Z" shape, saving space and improving the space utilization efficiency within the thermostat.

[0032] The embodiments described above merely illustrate the implementation of this utility model, and should not be construed as limiting the scope of this utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A dual-disc, dual-contact temperature control and protection combined temperature controller, characterized in that, Includes a housing (1) and a rear cover (2) located below the housing (1). A partition (3) is provided inside the housing (1). The partition (3) divides the internal space of the housing (1) into two parts. A disposable disc (4) and an automatic reset disc (6) are provided in the first cavity formed by the rear cover (2) and the lower part of the housing (1). The automatic reset disc (6) and the disposable disc (4) are arranged longitudinally in a staggered manner. The middle part of the disposable disc (4) and the automatic reset disc (6) protrudes towards the rear cover (2) in the initial state. The disposable disc (4) can only switch from the initial state to the trigger state. The automatic reset disc (6) switches between the initial state and the trigger state. Neither the disposable disc (4) nor the automatic reset disc (6) can change its spatial position to produce displacement or rotation. The disposable disc (4) and the automatic reset disc (6) are made of two metal materials with different thermal expansion coefficients bonded together. The set temperature of the sudden jump of the disposable disc (4) is greater than the set temperature of the sudden jump of the automatic reset disc (6). A cover (7) is detachably provided on the top of the housing (1). A static contact (9), a disposable moving contact (10) and an automatic reset moving contact (11) are provided in the second cavity formed by the cover (7) and the upper part of the housing (1). The static contact (9) is fixedly provided in the second cavity. The disposable moving contact (10) and the automatic reset moving contact (11) extend out of the housing (1) away from the center and are used to connect to the external circuit. The stationary contact piece (9) includes a connecting part (903), a first abutting part (901), and a second abutting part (902). The connecting part (903) is disposed between the first abutting part (901) and the second abutting part (902). A first mounting hole (904) is provided on the stationary contact piece (9). The first mounting hole (904) is disposed through the connecting part (903) and extends to the second abutting part (902). The first abutting part (901) and the second abutting part (902) are parallel to each other. A long push rod (13) is provided between the automatic reset moving contact (11) and the automatic reset disc (6), and a short push rod (12) is provided between the disposable moving contact (10) and the disposable disc (4). A first limiting hole (15) is provided through the partition (3) for the short push rod (12) and the long push rod (13) to move up and down, and a second limiting hole (16) is provided through the disposable disc (4) for the long push rod (13) to move up and down.

2. The dual-disc, dual-contact temperature control and protection combination temperature controller according to claim 1, characterized in that, The bottom of the partition (3) is provided with multiple protrusions (5) arranged at equal intervals around the central axis of the disposable disc (4), and the disposable disc (4) is provided with a second mounting hole (14) for the protrusions (5) to pass through. The automatic reset disc (6) is located between the protrusions (5) and the back cover (2).

3. The dual-disc, dual-contact temperature control and protection combination temperature controller according to claim 1, characterized in that, The cover (7) is fixed to the shell (1) by double-headed stepped rivets (8).

4. The dual-disc, dual-contact temperature control and protection combination temperature controller according to claim 1, characterized in that, The contact surfaces of the stationary contact (9) and the disposable moving contact (10) are plated with silver.

5. The dual-disc, dual-contact temperature control and protection combination temperature controller according to claim 1, characterized in that, The stationary contact piece (9) is formed by processing a straight sheet metal to form a connecting part (903), a first abutting part (901), and a second abutting part (902).

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