Probe assembly part and temperature controller

Abstract

The utility model relates to a probe assembly, which comprises a metal heat conducting plate and a temperature sensing probe, the side edge of the metal heat conducting plate is integrally connected with an elastic arm support, and the elastic arm support is provided with a positioning port; the temperature sensor further comprises a silica gel insulation sleeve, the lower portion of the silica gel insulation sleeve is of a complete straight tube structure and is embedded into the positioning opening, the middle of the silica gel insulation sleeve extends to form a limiting ring with the width larger than that of the positioning opening, the limiting ring abuts against the upper side of the elastic arm support, and the silica gel insulation sleeve is arranged on the outer side of the temperature sensing probe in an interference sleeving mode. The head of the temperature sensing probe abuts against the top face of the silica gel insulation sleeve, and the bottom of the temperature sensing probe extends outwards to form a leading-out wire. According to the connection scheme, the structure is simple, the installation speed is high, the assembly efficiency can be improved, the burden of workers is relieved, interference of peripheral structures on the temperature sensing probe is reduced, and the temperature sensing precision is improved.

Description

Technical Field

[0001] The utility model relates to the field of temperature controllers, in particular to a probe assembly and a temperature controller. Background Art

[0002] The current temperature sensor structure generally includes a metal shell and a temperature sensor installed in the metal shell. When the temperature sensor is installed in the inner cavity of the metal shell, sealing glue is injected into the inner cavity of the metal shell to fix the temperature sensor. However, in the process of injecting the sealant, bubbles are likely to remain in the inner cavity. When the temperature sensor is heated at high temperature, the air in the bubbles expands due to the heat, which may easily cause safety problems such as explosion of the temperature sensor. Moreover, the production and assembly process is complicated and the production efficiency is low. The sealing glue used may release harmful substances that can be inhaled by the assemblers, causing personal injury. In addition, the raw materials of the metal shell and the top cover are expensive, which increases the production cost of the temperature sensor. During assembly, an external wire is also required to connect the temperature sensor and the power terminal piece, which increases the assembly process and reduces production efficiency. Utility Model Content

[0003] The purpose of the present invention is to solve the above-mentioned existing problems and provide a probe assembly and a temperature controller with a simple and reasonable structure.

[0004] A probe assembly comprises a metal heat conducting plate and a temperature sensing probe, wherein the side of the metal heat conducting plate is integrally connected with an elastic arm bracket, and a positioning opening is provided on the elastic arm bracket; and further comprises a silicone insulating sleeve, the lower portion of which is a complete straight cylindrical structure, and the lower portion is embedded in the positioning opening, a limiting ring with a width greater than the positioning opening extends from the middle of the silicone insulating sleeve, the limiting ring is supported against the upper side of the elastic arm bracket, the silicone insulating sleeve interference sleeve is provided on the outside of the temperature sensing probe, and the head of the temperature sensing probe is supported against the top surface of the silicone insulating sleeve, and a lead wire extends outward from the bottom of the temperature sensing probe.

[0005] The purpose of the utility model can also be solved by the following technical measures:

[0006] As a more specific solution, the diameter of the lower portion of the silicone insulating sleeve is smaller than or equal to the diameter of any position of the positioning opening, and the lower portion of the silicone insulating sleeve forms a clearance fit with the positioning opening.

[0007] As a further solution, the positioning port is provided with an open port toward the end of the elastic arm bracket, and the positioning port with the open port forms a "U"-shaped structure, and limiting portions extend oppositely on both sides of the open port, and the distance between the two limiting portions is smaller than the width of any position of the positioning port.

[0008] As a further solution, the upper part of the silicone insulating sleeve is a complete straight cylindrical structure, the limiting ring is arranged between the upper part and the lower part, the diameter of the upper part is larger than the diameter of the lower part, and the thickness of the upper part is larger than the thickness of the lower part.

[0009] As a further solution, the elastic arm bracket is provided with a plurality of reinforcing ribs arranged along the extension direction of the metal heat conducting plate, and the plurality of reinforcing ribs are stamped integrally from the elastic arm bracket, and the plurality of reinforcing ribs are arranged at least on the left and right sides of the positioning port and convex toward the bottom surface of the elastic arm bracket.

[0010] As a further solution, the side of the metal heat conducting plate is integrally connected with a connecting portion extending obliquely downward, and the elastic arm bracket is integrally connected to the outer end of the connecting portion and extends horizontally.

[0011] The purpose of this utility model is achieved in this way:

[0012] A thermostat includes an upper connecting seat, on which a conductive circuit and a sensor circuit are provided, wherein the conductive circuit includes an anti-dry-burn switch, and the sensor circuit includes two terminal pieces extending from the outside of the upper connecting seat, wherein terminals are connected between the terminal pieces and the lead wires of the temperature sensing probe, and the top surface of the upper connecting seat is assembled with a probe assembly of the above structure, and an anti-dry-burn component adjacent to or against the anti-dry-burn switch is provided between the metal heat conducting plate and the upper connecting seat.

[0013] As a further solution, the terminal comprises a conductive copper sheet;

[0014] One end of the conductive copper sheet is integrally formed with a front wire clamp and a rear wire core clamp for connecting the lead wire, and the winding amplitude of the front wire clamp is greater than the winding amplitude of the rear wire core clamp;

[0015] The other end of the conductive copper sheet is integrally formed with a terminal crimping clamp, and the other end of the conductive copper sheet is stamped into a metal spring sheet that is folded toward the terminal crimping clamp. A clamping cavity for clamping the terminal piece is formed between the metal spring sheet and the terminal crimping clamp, and the metal spring sheet is provided with a breaking portion that can loosen or tighten the clamping cavity.

[0016] As a further solution, a fixed pressure plate for fixing the terminal piece is pressed between the metal heat conducting plate and the upper connecting seat; a positioning hole is provided on the terminal piece, and a positioning protrusion is extended from the upper connecting seat and inserted into the positioning hole; a positioning sleeve is extended from the bottom surface of the fixed pressure plate, which is pressed against the upper side of the terminal piece and inserted into the outside of the positioning protrusion.

[0017] As a further solution, the conductive circuit includes two sets of anti-dry-heat switches, each of which is composed of a moving contact piece and a stationary contact piece that touch each other;

[0018] The anti-dry-heat assembly includes a bimetallic strip and an insulating rod. The bimetallic strip is fixed to the top surface of the metal heat-conducting plate. The insulating rod is slidably connected to the fixed pressure plate and is adjacent to or abuts against the bimetallic strip of one set of anti-dry-heat switches.

[0019] The anti-dry-burning component also includes temperature-sensitive particles and a supporting column. The supporting column is movably placed on a fixed pressure plate, and its bottom end makes the moving contact piece and the static contact piece of another set of anti-dry-burning switches contact. The top of the supporting column is provided with a positioning cavity for placing the temperature-sensitive particles, and the temperature-sensitive particles are supported against the bottom surface of the metal heat-conducting plate.

[0020] The beneficial effects of the utility model are as follows:

[0021] This connection solution has a simple structure and fast installation speed, which can improve assembly efficiency, reduce the burden on workers, reduce the interference of surrounding structures on the temperature sensor, improve temperature sensing accuracy, and make the temperature controller suitable for large-scale automated production in industry. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic top view of the structure of an embodiment of a probe assembly in the present invention.

[0023] Figure 2 This is a schematic diagram of the exploded structure of the probe assembly in the present invention.

[0024] Figure 3 This is a schematic diagram of the cross-sectional structure of the silicone insulation sleeve in this utility model.

[0025] Figure 4 This is a schematic top view of the structure of an embodiment of the temperature controller of the present invention.

[0026] Figure 5 This is a schematic diagram of the wiring terminal structure in the utility model.

[0027] Figure 6 This is a schematic diagram of the exploded structure of the temperature controller in this utility model.

[0028] Figure 7 This is a schematic diagram of the cross-sectional structure of the temperature controller in this utility model. DETAILED DESCRIPTION

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0030] See also Figures 1 to 3As shown, a probe assembly includes a metal heat conducting plate 1 and a temperature sensing probe 2, the side of the metal heat conducting plate 1 is integrally connected with an elastic arm bracket 3, and a positioning hole 301 is opened on the elastic arm bracket 3; it also includes a silicone insulating sleeve 4, the lower part 41 of the silicone insulating sleeve 4 is a complete straight cylindrical structure, and the lower part 41 is embedded in the positioning hole 301, and a limiting ring 42 with a width greater than the positioning hole 301 extends from the middle of the silicone insulating sleeve 4, and the limiting ring 42 is held against the upper side of the elastic arm bracket 3, the silicone insulating sleeve 4 is interference fit and arranged on the outside of the temperature sensing probe 2, and the head 22 of the temperature sensing probe 2 is held against the top surface of the silicone insulating sleeve 4, and a lead wire 21 extends outward from the bottom of the temperature sensing probe 2.

[0031] This connection solution has a simple structure and fast installation speed, which can improve assembly efficiency, reduce the burden on workers, reduce the interference of surrounding structures on the temperature sensor 2, improve temperature sensing accuracy, and make the temperature controller suitable for large-scale automated production in industry.

[0032] The diameter of the lower portion 41 of the silicone insulating sleeve 4 is smaller than or equal to the diameter of any position of the positioning opening 301 , and the lower portion 41 of the silicone insulating sleeve 4 forms a clearance fit with the positioning opening 301 ; this allows the silicone insulating sleeve 4 to be naturally placed into the positioning opening 301 , without the need to squeeze the silicone insulating sleeve 4 , making assembly more natural and quick.

[0033] The positioning opening 301 is provided with an open opening 302 toward the end of the elastic arm bracket 3. The positioning opening 301 with the open opening 302 forms a "U"-shaped structure, and two limiting portions 303 extend oppositely on both sides of the open opening 302. The distance between the two limiting portions 303 is less than the width of any position of the positioning opening 301.

[0034] During conventional assembly, since the diameter of the lower part 41 of the silicone insulating sleeve 4 is less than or equal to the width of the positioning opening 301, the silicone insulating sleeve 4 can be placed into the positioning opening 301 from top to bottom, and the limiting ring 42 prevents the silicone insulating sleeve 4 from slipping. After the probe assembly is installed, the downward pulling force of the lead wire 21 is used to prevent the silicone insulating sleeve 4 from jumping out of the positioning opening 301. In other embodiments, the silicone insulating sleeve 4 can still be squeezed into the positioning opening 301 laterally using the open opening 302 for installation.

[0035] The upper portion 43 of the silicone insulating sleeve 4 is a complete straight cylindrical structure, and the limiting ring 42 is arranged between the upper portion 43 and the lower portion 41. The diameter of the upper portion 43 is greater than the diameter of the lower portion 41, and the thickness of the upper portion 43 is greater than the thickness of the lower portion 41. The upper portion 43 of the silicone insulating sleeve 4 with this structure has sufficient support for the temperature sensing probe 2 and will not collapse when the temperature sensing probe 2 is pressed against the heating plate.

[0036] The elastic arm bracket 3 is provided with a plurality of reinforcing ribs 304 arranged along the extending direction of the metal heat conducting plate 1, and a plurality of reinforcing ribs 305

[0037] The elastic arm bracket 3 is integrally stamped, and a plurality of reinforcing ribs 304 are arranged at least on the left and right sides of the positioning opening 301 and convex toward the bottom surface of the elastic arm bracket 3 ; the plurality of reinforcing ribs 304 can also improve the strength of the elastic arm bracket 3 .

[0038] The side of the metal heat conducting plate 1 is integrally connected with a connecting portion 305 extending obliquely downward, and the elastic arm bracket 3 is integrally connected to the outer end of the connecting portion 305 and is horizontally extended; the connection strength between the metal heat conducting plate 1 and the elastic arm bracket 3 can be strengthened, making the elastic arm bracket 3 not easily bent and deformed.

[0039] The purpose of this utility model is achieved in this way:

[0040] See also Figures 4 to 7 As shown, a thermostat includes an upper connecting base 5, on which a conductive circuit and a sensor circuit are provided, wherein the conductive circuit includes an anti-dry-burn switch, and the sensor circuit includes two terminal pieces 6 extending from the outside of the upper connecting base 5, and a terminal 7 is connected between the terminal piece 6 and the lead wire 21 of the temperature sensing probe 2. The top surface of the upper connecting base 5 is assembled with a probe assembly of the above structure, and an anti-dry-burn component adjacent to or against the anti-dry-burn switch is provided between the metal heat conducting plate 1 and the upper connecting base 5.

[0041] The connection terminal 7 includes a conductive copper sheet 71;

[0042] One end of the conductive copper sheet 71 is integrally formed with a front wire clamp 72 and a rear wire core clamp 73 for connecting the lead wire 21, and the winding amplitude of the front wire clamp 72 is larger than the winding amplitude of the rear wire core clamp 73; the front wire clamp 72 is used to clamp the lead wire 21, and the rear wire core clamp 73 is used to clamp the core of the lead wire 21. At this time, while forming an electrical connection, the lead wire 21 is not easily pulled loose, and the connection is more secure.

[0043] The other end of the conductive copper sheet 71 is integrally formed with a terminal crimping clamp 74, and the other end of the conductive copper sheet 71 is stamped into a metal spring sheet 75 that is folded toward the terminal crimping clamp 74. A clamping cavity for clamping the terminal piece 6 is formed between the metal spring sheet 75 and the terminal crimping clamp 74, and the metal spring sheet 75 is provided with a bend-opening portion 76 that can loosen or tighten the clamping cavity; during installation, the other end of the conductive copper sheet 71 is inserted into the terminal piece 6, and the terminal piece 6 is inserted into the clamping cavity, and the elasticity of the metal spring sheet 75 is used to clamp the terminal piece 6 and form an electrical connection. When removing or reinstalling the terminal 7, it is only necessary to press the bend-opening portion 76 to make the metal spring sheet 75 loosen the terminal piece 6.

[0044] A fixed pressure plate 8 for fixing the terminal block 6 is pressed between the metal heat conducting plate 1 and the upper connecting seat 5; a positioning hole 61 is provided on the terminal block 6, and a positioning boss 51 is extended from the upper connecting seat 5 to be inserted into the positioning hole 61; a positioning sleeve 81 is extended from the bottom surface of the fixed pressure plate 8 to be pressed against the upper side of the terminal block 6 and inserted into the outside of the positioning boss 51.

[0045] The conductive circuit includes two sets of anti-dry-heat switches, which are composed of a moving contact piece 91 and a static contact piece 92 that touch each other. One end of the static contact piece 92 extends out of the upper connecting seat 5 to serve as a live wire terminal piece or a neutral wire terminal piece.

[0046] The anti-dry-heat assembly includes a bimetallic strip 10 and an insulating rod 11. The bimetallic strip 10 is fixed to the top surface of the metal heat-conducting plate 1. The insulating rod 11 is slidably connected to the fixed pressure plate 8 and is adjacent to or abuts against the bimetallic strip 10 between the moving contact piece 91 of one set of anti-dry-heat switches. When the temperature of the heating plate sensed by the bimetallic strip 10 equals or exceeds a preset temperature value, the bimetallic strip 10 actuates and drives the insulating rod 11, which presses downward against the moving contact piece 91, separating the moving contact piece 91 from the static contact piece 92, thereby disconnecting the circuit.

[0047] The anti-dry-burning component also includes temperature-sensitive particles 12 and a supporting column 13. The supporting column 13 is movably placed on the fixed pressure plate 8, and its bottom end makes the moving contact piece 91 of another group of anti-dry-burning switches contact with the static contact piece 92. The top of the supporting column 13 is provided with a positioning cavity for placing the temperature-sensitive particles 12, and the temperature-sensitive particles 12 are supported against the bottom surface of the metal heat-conducting plate 1; when the temperature of the heating disk sensed by the temperature-sensitive particles 12 is equal to or exceeds the preset temperature value, the temperature-sensitive particles 12 dissolve, and the supporting column 13 loses the top supporting force. The conventionally pressed moving contact piece 91 lifts the supporting column 13 and separates from the static contact piece 92, thereby disconnecting the circuit.

[0048] The above is a preferred embodiment of the present invention, which shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are within the scope of the present invention as claimed, which is defined by the appended claims and their equivalents.

Claims

1. A probe assembly, comprising a metal heat conducting plate and a temperature sensing probe, characterized in that: The side of the metal heat conducting plate is integrally connected with an elastic arm bracket, and a positioning opening is provided on the elastic arm bracket; it also includes a silicone insulating sleeve, the lower part of the silicone insulating sleeve is a complete straight cylindrical structure, and the lower part is embedded in the positioning opening, and a limiting ring with a width greater than the positioning opening extends from the middle of the silicone insulating sleeve, and the limiting ring is supported on the upper side of the elastic arm bracket. The silicone insulating sleeve interference sleeve is provided on the outside of the temperature sensing probe, and the head of the temperature sensing probe is supported on the top surface of the silicone insulating sleeve, and a lead wire extends outward from the bottom of the temperature sensing probe.

2. The probe assembly according to claim 1, characterized in that: The diameter of the lower portion of the silicone insulating sleeve is smaller than or equal to the diameter of any position of the positioning opening, and the lower portion of the silicone insulating sleeve forms a clearance fit with the positioning opening.

3. The probe assembly according to claim 1, characterized in that: The positioning port is provided with an open port toward the end of the elastic arm bracket. The positioning port with the open port forms a "U"-shaped structure, and limiting portions extend oppositely on both sides of the open port. The distance between the two limiting portions is smaller than the width of any position of the positioning port.

4. The probe assembly according to claim 1, characterized in that: The upper portion of the silicone insulating sleeve is a complete straight cylindrical structure, the limiting ring is arranged between the upper portion and the lower portion, the diameter of the upper portion is greater than the diameter of the lower portion, and the thickness of the upper portion is greater than the thickness of the lower portion.

5. The probe assembly according to claim 1, characterized in that: The elastic arm bracket is provided with a plurality of reinforcing ribs arranged along the extension direction of the metal heat conducting plate. The plurality of reinforcing ribs are stamped integrally from the elastic arm bracket, and the plurality of reinforcing ribs are arranged at least on the left and right sides of the positioning port and convex toward the bottom surface of the elastic arm bracket.

6. The probe assembly according to claim 1, characterized in that: A connecting portion extending obliquely downward is integrally connected to the side of the metal heat conducting plate, and the elastic arm bracket is integrally connected to the outer end of the connecting portion and extends horizontally.

7. A thermostat comprising an upper connecting base, the upper connecting base being provided with a conductive circuit and a sensing circuit, wherein the conductive circuit includes an anti-dry-burn switch, and the sensing circuit includes two terminal blocks extending from the upper connecting base, wherein a terminal block is connected to a lead wire of a temperature sensor, wherein: The top surface of the upper connecting seat is assembled and connected with the probe assembly according to any one of claims 1 to 6, and an anti-dry-burn component adjacent to or against the anti-dry-burn switch is provided between the metal heat conducting plate and the upper connecting seat.

8. The thermostat according to claim 7, characterized in that: The terminal comprises a conductive copper sheet; One end of the conductive copper sheet is integrally formed with a front wire clamp and a rear wire core clamp for connecting the lead wire, and the winding amplitude of the front wire clamp is greater than the winding amplitude of the rear wire core clamp; The other end of the conductive copper sheet is integrally formed with a terminal crimping clamp, and the other end of the conductive copper sheet is stamped into a metal spring sheet that is folded toward the terminal crimping clamp. A clamping cavity for clamping the terminal piece is formed between the metal spring sheet and the terminal crimping clamp, and the metal spring sheet is provided with a breaking portion that can loosen or tighten the clamping cavity.

9. The thermostat according to claim 7, characterized in that: A fixed pressure plate for fixing the terminal piece is pressed between the metal heat conducting plate and the upper connecting seat; a positioning hole is provided on the terminal piece, and a positioning protrusion is extended from the upper connecting seat and inserted into the positioning hole; a positioning sleeve is extended from the bottom surface of the fixed pressure plate and is pressed against the upper side of the terminal piece and inserted into the outside of the positioning protrusion.

10. The thermostat according to claim 7, characterized in that: The conductive circuit includes two sets of anti-dry-heat switches, each of which is composed of a moving contact piece and a stationary contact piece that touch each other; The anti-dry-heat assembly includes a bimetallic strip and an insulating rod. The bimetallic strip is fixed to the top surface of the metal heat-conducting plate. The insulating rod is slidably connected to the fixed pressure plate and is adjacent to or abuts against the bimetallic strip of one set of anti-dry-heat switches. The anti-dry-burning component also includes temperature-sensitive particles and a supporting column. The supporting column is movably placed on a fixed pressure plate, and its bottom end makes the moving contact piece and the static contact piece of another set of anti-dry-burning switches contact. The top of the supporting column is provided with a positioning cavity for placing the temperature-sensitive particles, and the temperature-sensitive particles are supported against the bottom surface of the metal heat-conducting plate.

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