Durable and reliable temperature sensor
By using a sealed structure combining RVV two-core wires with a stainless steel blind tube, the gap problem caused by the different expansion coefficients of materials in traditional temperature sensors is solved, achieving higher measurement accuracy and service life, and reducing the failure rate of air conditioning systems.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-14
- Publication Date
- 2026-03-20
AI Technical Summary
Traditional temperature sensors have gaps due to differences in the coefficients of thermal expansion of their materials, which allow moisture and dust to penetrate, affecting measurement accuracy and lifespan, and making it difficult to detect faults.
It uses RVV two-core wires combined with stainless steel blind tubes, and forms a seal through a rubber protective layer and snap-fit structure to block dust and moisture, thereby improving tensile strength and service life.
It effectively blocks dust and moisture erosion, improves the measurement accuracy and service life of sensors, reduces the failure rate of air conditioning systems, and reduces maintenance workload.
Smart Images
Figure CN224019170U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to air conditioner temperature sensor technical field, specifically a durable reliable temperature sensor. BACKGROUND
[0002] The normal work of air conditioning system needs to collect many temperature parameters, and the control system of air conditioner controls the work of refrigeration components such as air conditioner compressor, fan, electronic expansion valve and four-way valve according to corresponding operation logic through the calculation and judgment of various temperature parameters collected. Therefore, temperature sensor plays a vital role in air conditioning system, and its quantity is determined according to the application scene of air conditioner, and the air conditioner with single function needs only one, and the air conditioner with more functions needs seven or even more.
[0003] The complete damage of temperature sensor will cause the alarm shutdown of air conditioning system. The most troublesome situation is the inaccuracy of measurement precision and the drift of measurement value, and the air conditioning system makes a false judgment due to the collection of wrong temperature information, thereby causing the air conditioning system to work in an abnormal state, resulting in the performance decline of air conditioning system, the increase of energy consumption, and even the damage of some parts. Sometimes, a certain temperature information is self-contradictory with other collected temperature information, and even causes the disorder of air conditioning control system, unexpected failure phenomenon, and the air conditioning system is difficult to detect the fault and alarm, which makes the maintenance personnel unable to find the maintenance direction.
[0004] The traditional temperature sensor is welded with NTC element on 0.5 square RVB two-core wire, and the resin packaging mode is used to package NTC element and wire into a section of stainless steel blind pipe. After the resin solidification, NTC element, wire and stainless steel blind pipe are fixed into a complete temperature sensor. Due to the different expansion coefficients of resin and stainless steel blind pipe, after a period of use of temperature sensor, a gap will appear between resin and stainless steel blind pipe, so that moisture, dust and other impurities directly contact NTC element. NTC element is most easily eroded by moisture, resulting in inaccuracy of measurement precision, drift of measurement value, and even complete damage. Therefore, we provide a durable and reliable temperature sensor. UTILITY MODEL CONTENTS
[0005] The utility model aims at providing a durable and reliable temperature sensor to solve the problems in the prior art.
[0006] In order to achieve the above object, the utility model provides the following technical scheme: a durable and reliable temperature sensor, including RVV two-core wire, metal blind pipe, resin and NTC element, the NTC element is welded on RVV two-core wire, and the RVV two-core wire one end and NTC element are packaged in metal blind pipe through resin, and the metal blind pipe and RVV two-core wire are buckled with buckling structure.
[0007] Preferably, the RVV two-core wire is composed of two parallel arranged core wires and an outer sheath, and the two core wires are wrapped by the outer sheath.
[0008] Preferably, the RVV two-core wire has a circular cross-sectional shape, and the outer sheath is a rubber sleeve.
[0009] Preferably, the clamping structure is composed of two annular grooves and a polygonal structure.
[0010] Preferably, the metal blind pipe is a stainless steel blind pipe.
[0011] Compared with the prior art, the NTC element of the temperature sensor and the RVV two-core wire are packaged by resin, so that the firmness and shock resistance of the NTC element and the wire welding are ensured; in addition, the RVV two-core wire has a rubber protective layer outside compared with the traditional RVB two-core wire, and has a circular cross-sectional shape, while the traditional RVB two-core wire is a two-core parallel wire without the external rubber protective layer, and has a flat cross-sectional shape. The rubber protective layer of the RVV two-core wire and the stainless steel blind pipe are clamped to form a second sealing structure, and because the rubber protective layer has a certain compressibility, it will automatically deform with the thermal expansion and contraction of the stainless steel blind pipe, so that the wire is always in close combination with the stainless steel blind pipe, and the gap caused by the different expansion coefficients of the two materials will not appear, so that the erosion of sand, moisture on the NTC element is completely blocked, and the tensile strength of the entire temperature sensor is also improved, the normal work and service life of the temperature sensor are maximized, the normal operation of the entire air conditioning system is ensured, and the failure rate and the workload of the maintenance personnel are reduced. BRIEF DESCRIPTION OF DRAWINGS
[0012] The accompanying drawings are included to provide a further understanding of the present application and are incorporated in and constitute a part of this specification, illustrate embodiments of the present application and serve to explain the present application, and do not constitute a limitation of the present application. In the drawings:
[0013] Fig. 1 is a structural schematic view of the present application;
[0014] Fig. 2 is an exploded view of the present application.
[0015] In the drawings: 1, RVV two-core wire; 2, clamping structure; 3, metal blind pipe; 4, resin; 5, NTC element; 11, core wire; 12, outer sheath. DETAILED DESCRIPTION
[0016] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme of the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application.
[0017] Referring to Figs. 1-2 In the embodiments of the present application, a durable and reliable temperature sensor comprises RVV two-core wires 1, a metal blind pipe 3, resin 4 and an NTC element 5. The NTC element 5 is welded on the RVV two-core wires 1. One end of the RVV two-core wires 1 and the NTC element 5 are encapsulated in the metal blind pipe 3 through the resin 4. The metal blind pipe 3 is a stainless steel blind pipe. A clamping structure 2 is clamped between the metal blind pipe 3 and the RVV two-core wires 1. The clamping structure 2 is composed of two annular grooves and one polygonal structure.
[0018] The RVV two-core wires 1 are composed of two parallel core wires 11 and an outer sheath 12. The two core wires 11 are wrapped by the outer sheath 12. The cross-sectional shape of the RVV two-core wires 1 is circular. The outer sheath 12 is a rubber sleeve.
[0019] The temperature sensor is composed of an NTC element, a 5*25 stainless steel blind pipe and 0.5 square outer diameter 4mm RVV two-core wires. The NTC element is welded on the RVV two-core wires. The NTC element and the RVV two-core wires are fixed in the stainless steel blind pipe by using the resin encapsulation method. The stainless steel blind pipe and the wires are further fixed and sealed by using the clamping method.
[0020] The NTC element and the RVV two-core wire of the temperature sensor are encapsulated by resin, so that the welding of the NTC element and the wire is firm and shock-resistant; in addition, compared with the traditional RVB two-core wire, the RVV two-core wire has a rubber protective layer outside, and the cross section is circular, while the traditional RVB two-core wire is two parallel wires without the rubber protective layer outside, and the cross section is flat. Therefore, the rubber protective layer of the RVV two-core wire and the stainless steel blind pipe can be clamped to form a second sealing structure by using the clamping process, because the rubber protective layer has a certain compressibility, it will automatically deform with the thermal expansion and contraction of the stainless steel blind pipe, so that the wire is always in close contact with the stainless steel blind pipe, and the gap caused by the different expansion coefficients of the two materials will not appear, so the erosion of sand, moisture and other factors on the NTC element is completely blocked, and the tensile strength of the entire temperature sensor is improved, the normal operation and service life of the temperature sensor are maximized, the normal operation of the entire air conditioning system is ensured, and the workload of maintenance personnel is reduced.
[0021] First, the two pins of the NTC element are welded on the two wires of the RVV two-core wire, and the insulation protection between the two pins is good to prevent short circuit, then resin is injected into the 5*25 stainless steel blind pipe, the injection amount is about half of the volume of the 5*25 stainless steel blind pipe, and the remaining half of the wire clamping space is reserved to ensure that the resin can completely wrap the NTC element and its two pins; then the RVV two-core wire with the welded NTC element is inserted into the 5*25 stainless steel blind pipe, the insertion depth is half of the depth of the stainless steel blind pipe, and finally the stainless steel blind pipe and the RVV two-core wire are clamped and sealed firmly by using a special clamping tool.
[0022] Finally, it should be noted that: the above only describes the preferred embodiments of the present application, and is not used to limit the present application, although the present application has been described in detail with reference to the foregoing embodiments, for those skilled in the art, the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced. Any modification, equivalent replacement, improvement, etc. within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A durable and reliable temperature sensor, characterized in that: It includes an RVV two-core wire (1), a metal blind tube (3), resin (4) and an NTC element (5). The NTC element (5) is soldered onto the RVV two-core wire (1). One end of the RVV two-core wire (1) and the NTC element (5) are encapsulated in the metal blind tube (3) by the resin (4). A clamping structure (2) is clamped between the metal blind tube (3) and the RVV two-core wire (1).
2. The durable and reliable temperature sensor according to claim 1, characterized in that: The RVV two-core conductor (1) consists of two parallel core wires (11) and an outer sheath (12), with the two core wires (11) wrapped by the outer sheath (12).
3. A durable and reliable temperature sensor according to claim 2, characterized in that: The cross-sectional shape of the RVV two-core conductor (1) is circular, and the outer sheath (12) is made of rubber.
4. A durable and reliable temperature sensor according to claim 1, characterized in that: The seizing structure (2) consists of two annular grooves and a polygonal structure.
5. A durable and reliable temperature sensor according to claim 1, characterized in that: The metal blind tube (3) is made of stainless steel.