CN211831208U

CN211831208U - NTC lead-out device for thick film heating assembly

Info

Publication number: CN211831208U
Application number: CN202020346153.2U
Authority: CN
Inventors: 陈天德
Original assignee: Foshan Nanhai Shaozhan Rubber & Plastic Co ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Foshan Nanhai Shaozhan Rubber & Plastic Co ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2020-03-18
Filing date: 2020-03-18
Publication date: 2020-10-30
Anticipated expiration: 2030-03-18

Abstract

The utility model provides an NTC extraction device for a thick film heating component, which comprises a shell, an inner core, a spring and an NTC thermistor, wherein an accommodating space is formed between the periphery of the inner core and the shell at intervals; the spring is sleeved on the outer periphery of the inner core and accommodated in the accommodating space, one end of the spring is fixed on the shell, and the other end of the spring is abutted against the clamping wall; the spring is compressed and deformed to generate deformation restoring force so as to push the inner core to move towards the direction far away from the shell; the resistance body of the NTC thermistor is arranged at one end of the inner core, which is far away from the shell, and is positioned between the two wire grooves, and two resistance pins of the NTC thermistor are respectively arranged in the wire grooves of the inner core in a penetrating manner. Compared with the prior art, the utility model discloses a NTC eduction gear for thick film heating element good reliability, maintenance rate are low.

Description

NTC lead-out device for thick film heating assembly

Technical Field

The utility model relates to a firing equipment field especially relates to an apply to NTC eduction gear that is used for thick film heating element of water dispenser.

Background

The water dispenser is used as a daily electric appliance commonly used in family life and office places, and is convenient for the life of people. The water dispenser in the related art generally has a heating function, and the water dispenser comprises a thick film heating assembly which can be quickly heated after being electrified, and a heating pipe is arranged in the thick film heating assembly, so that water flowing into the thick film heating assembly can be quickly heated by the heating pipe. In order to prevent the water dispenser from being damaged by dry burning and even causing fire, the water dispenser in the related art is additionally provided with an NTC (Negative Temperature CoeffiCient) thermistor, the NTC thermistor is used for detecting the Temperature change of the heat pipe, and an electric control system judges whether the water dispenser is abnormal or not by detecting the resistance change of the NTC thermistor, if no water is dried, the Temperature is quickly increased, so that the resistance of the NTC thermistor is quickly and greatly reduced, and at the moment, the electric control system can control to disconnect a heating circuit, thereby playing a role in protection.

However, in the water dispenser of the related art, the silver disc is designed on the instant heating pipe, and the NTC thermistor is welded on the silver disc to detect the temperature change of the instant heating pipe, but in the structure, the soldering point is easily separated from the silver disc to cause an open circuit due to the repeated change of the instant heating pipe once cooled and once heated, so that the temperature detection function of the instant heating pipe is lost, the water dispenser is damaged, the reliability is poor, and the maintenance rate is high.

Therefore, there is a need to provide a new NTC extraction device for thick film heating assemblies that addresses the above problems.

SUMMERY OF THE UTILITY MODEL

The utility model discloses the technical problem that needs to solve provides a NTC eduction gear for thick film heating element that good reliability, maintenance rate are low.

In order to achieve the above object, the utility model provides a NTC eduction gear for thick film heating element, include:

the shell is of a hollow columnar structure with an opening at the bottom end and a closed top end; the top end is provided with at least two connecting holes penetrating through the top end;

the inner core is at least partially accommodated in the shell, and an accommodating space is formed between the peripheral side of the inner core and the shell at intervals; the inner core comprises an inner core body, two wire grooves which penetrate through the inner core body along the axial direction of the outer shell and a clamping wall which protrudes outwards from the peripheral side of the inner core body;

the spring is sleeved on the outer peripheral side of the inner core body and accommodated in the accommodating space, one end of the spring is fixed to the shell, and the other end of the spring abuts against the clamping wall; the spring is compressed and deformed to generate deformation restoring force so as to push the inner core to move towards the direction far away from the top end; and

the NTC thermistor comprises a resistor body and two resistor pins, wherein the resistor body is arranged between the two wire grooves and the two resistor pins extend from two ends of the resistor body, the one end of the inner core, which is far away from the top end, is provided with two connecting holes, and the two resistor pins are respectively arranged in the two wire grooves in a penetrating manner and are respectively opposite to the two connecting holes.

Preferably, the wire connecting device further comprises two wire connecting copper sleeves, the two wire connecting copper sleeves are installed and fixed on one side, close to the top end, of the inner core, and the two wire connecting copper sleeves are arranged opposite to the two connecting holes respectively and used for connecting external electric wires; the two wiring copper sleeves are respectively opposite to the two wire grooves, and one end, close to the top end, of the resistor pin is fixedly and electrically connected with the wiring copper sleeves.

Preferably, the inner core further comprises an accommodating groove formed by recessing one end of the inner core far away from the top end, and the resistor body is accommodated in the accommodating groove and partially protrudes out of the accommodating groove.

Preferably, the top end is further provided with a positioning hole penetrating through the top end, the inner core further comprises a positioning column protruding and extending from one end of the inner core close to the top end to the positioning hole, and the positioning column is clamped in the positioning hole to realize positioning of the inner core and the outer shell.

Preferably, one end of the spring close to the blocking wall is in blocking connection with the blocking wall.

Preferably, the inner core still include by it is kept away from the sunken groove of stepping down that forms of one end on top, the depth of extension in the groove of stepping down is greater than the depth of extension of accepting groove, just the resistance body with the groove of stepping down is just to setting up.

Compared with the prior art, the utility model discloses an among the NTC eduction gear for thick film heating element, through setting up the mutual matched stack of shell that inner core and cover were located the inner core, install NTC thermistor in the inner core is kept away from the one end of shell top, the spring housing is located inner core periphery side, and spring one end is fixed in the shell, and the other end butt in the card wall of inner core, spring compression deformation produces deformation restoring force to promote the inner core to move to the direction of keeping away from the top, thereby makes NTC thermistor butt in the instant heating pipe, and need not with the instant heating pipe welding can realize the temperature detection to the instant heating pipe; and because the thrust of spring compression has the regulatory scope, make NTC thermistor with the contact reliability of heat pipe promptly good, change convenient, maintain less and with low costs.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work, wherein:

fig. 1 is a schematic perspective view of an NTC extraction device for a thick film heating assembly according to the present invention;

fig. 2 is a cross-sectional view of an NTC extraction device for a thick film heating assembly of the present invention;

fig. 3 is an assembly schematic diagram of the NTC extraction device for a thick film heating assembly according to the present invention applied to a heat pipe.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-3, the present invention provides an NTC lead-out device 100 for a thick film heating assembly, which includes a housing 1, an inner core 2, a spring 3, a wiring copper sleeve 4, and an NTC thermistor 5.

The shell 1 is a hollow cylindrical structure with an opening at the bottom end 11 and a closed top end 12. The top end 12 is provided with at least two connection holes 121 therethrough.

The inner core 2 is at least partially accommodated in the outer shell 1, and an accommodating space 10 is formed between the peripheral side of the inner core 2 and the outer shell 1 at an interval. Specifically, the inner core 2 includes an inner core body 21, two wire slots 22 penetrating through the inner core body 21 in the axial direction of the outer shell 1, and a chuck wall 23 protruding outward from the peripheral side of the inner core body 21.

The spring 3 is sleeved on the outer periphery of the inner core body 21 and accommodated in the accommodating space 10, one end of the spring 3 is fixed to the outer shell 1, and the other end of the spring abuts against the blocking wall 23. After the structure is arranged, when the structure is used, the spring 3 is in a compressed state and generates deformation restoring force through compression deformation so as to push the inner core 2 to move towards the direction far away from the top end 12.

Preferably, one end of the spring 3 close to the blocking wall 23 is connected with the blocking wall 23 in a blocking manner, so that the inner core 2 and the shell 1 are connected into a whole through the spring 3, and the installation is simple and convenient.

The wiring copper bush 4 comprises two wiring copper bushes 4 which are installed and fixed on one side, close to the top end, of the inner core 2, and the two wiring copper bushes 4 are arranged opposite to the two connecting holes 121 and used for connecting an external electric wire 7, a positive pole and a negative pole. And the two wiring copper sleeves 4 are respectively arranged opposite to the two wire slots 22. The arrangement of the wiring copper sleeve 4 facilitates the installation and replacement of the external electric wire 7.

The NTC thermistor 5 comprises a resistor body 51 which is arranged at one end of the inner core 2, which is far away from the top end 12, and is positioned between the two wire slots 22, and two resistor pins 52 which extend from two ends of the resistor body 51, wherein the two resistor pins 52 are respectively arranged in the two wire slots 22 in a penetrating manner and are respectively opposite to the two connecting holes 121, and are used for realizing connection with an external electric wire 7. When the wiring copper sleeve 4 is arranged, the resistance pin 52 is firstly directly electrically connected with the wiring copper sleeve 4, and then is electrically connected with the external electric wire 7 through the wiring copper sleeve 4.

Of course, it is also possible to arrange the resistance pin 52 directly opposite to the connection hole 121 without the copper wiring sleeve 4 for leading the external electric wire 7. The wiring copper bush 4 is preferably arranged, and is more convenient and quicker to connect with an external electric wire 7 or replace.

Preferably, in this embodiment, the inner core 2 further includes a receiving groove 24 formed by recessing an end of the inner core away from the top end 12, and the resistor body 51 is received in the receiving groove 24 and partially protrudes from the receiving groove 24. The structure enables the NTC thermistor 5 to be positioned and more reliable in use.

In this embodiment, preferably, the top end 12 further has a positioning hole 122 penetrating therethrough, the inner core 2 further includes a positioning post 25 protruding from one end of the inner core close to the top end 12 toward the positioning hole 122, and the positioning post 25 is clamped in the positioning hole 122 to position the inner core 2 and the outer shell 1. When the positioning structure is used, the inner core 2 is stressed to compress the spring 3, so that the positioning column 25 is clamped in the positioning hole 122 and moves along the positioning hole 122 within a certain range of stroke, and the stability is higher.

In this embodiment, the inner core 2 further includes by it is kept away from the sunken groove 26 of stepping down that forms of the one end of top 12, the extension degree of depth of the groove 26 of stepping down is greater than the extension degree of depth of the accepting groove 25, just the resistance body 51 with the groove 26 of stepping down is just to setting up to can not gather heat around making the resistance body 51, the detection is that the temperature variation accuracy of heat pipe 8 is higher promptly.

When the NTC extraction device 100 for the thick film heating assembly is used, the NTC extraction device is inserted into the shell 9 of the thick film heating assembly, the resistor body 51 of the NTC thermistor 5 is abutted to the instant heating pipe 8, the spring 3 is in a compressed state at the moment, and the shell 1 and the shell 9 are fixed, so that the contact and detection of the NTC thermistor 5 and the instant heating pipe 8 can be realized, the welding is not needed, the reliability is higher, the problems of open circuit and the like caused by welding are avoided due to the spring pressure abutting mode, the maintenance frequency is reduced, and the maintenance cost is reduced.

The above only is the embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent processes of the present invention are used in the specification and the attached drawings, or directly or indirectly applied to other related technical fields, and the same principle is included in the protection scope of the present invention.

Claims

1. An NTC extraction device for a thick film heating assembly comprising:

the spring is sleeved on the outer peripheral side of the inner core body and accommodated in the accommodating space, one end of the spring is fixed to the shell, and the other end of the spring abuts against the clamping wall; the spring is compressed and deformed to generate deformation restoring force so as to push the inner core to move towards the direction far away from the top end; and the number of the first and second groups,

2. The NTC extraction apparatus for a thick film heating assembly of claim 1, further comprising two copper wiring sleeves, wherein the two copper wiring sleeves are fixedly mounted on one side of the inner core near the top end, and are respectively arranged opposite to the two connecting holes for connecting external wires; the two wiring copper sleeves are respectively opposite to the two wire grooves, and one end, close to the top end, of the resistor pin is fixedly and electrically connected with the wiring copper sleeves.

3. The NTC extraction apparatus for a thick film heating element of claim 1, wherein the core further comprises a recess formed in an end thereof remote from the top end, the body being received in the recess and partially protruding therefrom.

4. An NTC extraction assembly for a thick film heating assembly as claimed in claim 1, wherein the top end further includes locating holes extending therethrough, the core further including locating posts projecting from an end thereof adjacent the top end in the direction of the locating holes, the locating posts being engaged with the locating holes to locate the core in the housing.

5. The NTC extraction apparatus for a thick film heating assembly of claim 1, wherein an end of the spring adjacent the chuck wall forms a snap connection with the chuck wall.

6. The NTC extraction apparatus for a thick film heating assembly of claim 3, wherein the inner core further comprises a relief groove formed by recessing the end of the inner core remote from the top end, the depth of extension of the relief groove is greater than the depth of extension of the receiving groove, and the resistor body is directly opposite to the relief groove.