Sealing structure of NTC (Negative Temperature Coefficient) temperature sensor of high-precision large commercial water heater

Abstract

The utility model discloses a sealing structure of a high-precision large commercial water heater NTC temperature sensor, which comprises a metal rear seat, one end of the metal rear seat is provided with a connector, the metal rear seat is internally provided with a first mounting groove, the inner center of the first mounting groove is provided with a stainless steel pipe, and the inner center of the stainless steel pipe is provided with a second mounting groove. A thermistor is installed at the end, away from the metal rear seat, of the stainless steel pipe, installation columns are symmetrically installed in the first installation groove, second installation grooves are formed in the side faces of the installation columns, springs are installed in the second installation grooves, stators are installed at one ends of the springs, and a protection shell is arranged in the first installation groove. Through the arrangement of the protective shell, the protective shell can resist corrosion generated by scale due to the material of the protective shell so as to protect the stainless steel pipe, and meanwhile, the corrosion-resistant layer is arranged at the joint of the stainless steel pipe and the protective shell, so that protection is further provided, and the short circuit condition is avoided.

Description

Technical Field

[0001] The utility model relates to the field of sensors, in particular to a sealing structure of a high-precision large-scale commercial water heater NTC temperature sensor. Background Art

[0002] Temperature sensor refers to a sensor that can sense temperature and convert it into a usable output signal. Temperature sensor is the core part of temperature measuring instruments and there are many varieties. According to the measurement method, it can be divided into two categories: contact type and non-contact type. According to the sensor material and electronic component characteristics, it can be divided into two categories: thermal resistor and thermocouple.

[0003] With long-term use of the water heater, salts such as calcium and magnesium contained in the water will precipitate when heated and adhere to the metal surface to form scale. When the scale is attached to the sensor, it will gradually corrode the sensor casing, causing water to enter the sensor, thereby causing the sensor to short-circuit. Utility Model Content

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a sealing structure of a high-precision large-scale commercial water heater NTC temperature sensor, including a metal back seat, a connector is installed at one end of the metal back seat, a first installation groove is opened inside the metal back seat, a stainless steel pipe is installed at the center of the first installation groove, a thermistor is installed at the end of the stainless steel pipe away from the metal back seat, installation columns are symmetrically installed inside the first installation groove, a second installation groove is opened on the side of the installation column, a spring is installed inside the second installation groove, a stator is installed at one end of the spring, and a protective shell is arranged inside the first installation groove.

[0005] The utility model is further configured that an opening penetrated by a stainless steel pipe is formed at one end of the protective shell away from the metal back seat.

[0006] The utility model is further configured that a through hole matching the size of the mounting column and the stator is opened at one end of the protective shell close to the metal rear seat, and the through hole extends and passes through the side surface of the protective shell.

[0007] The utility model is further configured that the outer surface of the end of the protective shell away from the metal rear seat is provided with a corrosion-resistant layer.

[0008] The utility model is further configured that the wiring of the thermistor is placed through the interior of the stainless steel pipe and an insulating layer is arranged inside the stainless steel pipe.

[0009] The utility model is further configured that the protective shell is made of acid-resistant steel.

[0010] The beneficial effects of the utility model are as follows:

[0011] 1. The utility model provides a protective shell, and due to the material of the protective shell, the protective shell can resist corrosion caused by scale to protect the stainless steel pipe. At the same time, a corrosion-resistant layer is provided at the connection between the stainless steel pipe and the protective shell to further provide protection and avoid the occurrence of short circuits;

[0012] 2. The utility model provides a mounting column and a component on the mounting column, and cooperates with a through hole on the protective shell, so that the protective shell can be easily assembled with the metal back seat, and subsequent replacement and maintenance are also convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model;

[0014] Figure 2 It is a structural front view of the utility model;

[0015] Figure 3 It is a structural sectional view of the utility model;

[0016] Figure 4 for Figure 3 Enlarged cross-sectional view of the structure at point A in the middle.

[0017] In the figure: 1. metal back seat; 2. connector; 3. stainless steel tube; 4. thermistor; 5. first mounting slot; 6. mounting column; 7. second mounting slot; 8. spring; 9. stator; 10. protective shell. DETAILED DESCRIPTION

[0018] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the protection scope of the present invention.

[0019] See also Figures 1 to 4 A sealing structure of a high-precision large-scale commercial water heater NTC temperature sensor comprises a metal back seat 1, a connector 2 is installed at one end of the metal back seat 1, a first installation groove 5 is opened inside the metal back seat 1, a stainless steel tube 3 is installed at the center of the first installation groove 5, a thermistor 4 is installed at one end of the stainless steel tube 3 away from the metal back seat 1, installation columns 6 are symmetrically installed inside the first installation groove 5, a second installation groove 7 is opened on the side of the installation column 6, a spring 8 is installed inside the second installation groove 7, a stator 9 is installed at one end of the spring 8, and a protective shell 10 is arranged inside the first installation groove 5.

[0020] like Figure 3 As shown, an end of the protective shell 10 away from the metal back seat 1 is provided with an opening penetrated by the stainless steel tube 3, so that the stainless steel tube 3 can extend to the outside of the protective shell 10, allowing the thermistor 4 to contact the outside to perform temperature measurement.

[0021] like Figure 4 As shown, a through hole matching the size of the mounting post 6 and the stator 9 is provided at one end of the protective shell 10 near the metal back seat 1, and the through hole extends and passes through the side of the protective shell 10. Through the provided through hole, when assembling the protective shell 10, the through hole is connected to the mounting post 6, and the stator 9 is allowed to enter the through hole to fix the protective shell 10, thereby realizing convenient installation of the protective shell 10.

[0022] like Figure 4 As shown, the outer surface of the protective shell 10 away from the metal back seat 1 is provided with a corrosion-resistant layer. By providing the corrosion-resistant layer, the scale generated inside the water heater due to long-term use can be prevented from corroding the interface between the stainless steel pipe 3 and the protective shell 10.

[0023] The wiring of the thermistor 4 is placed through the interior of the stainless steel tube 3 and an insulating layer is provided inside the stainless steel tube 3. The use of the insulating layer avoids the occurrence of a short circuit.

[0024] The protective shell 10 is made of acid-resistant steel, so that the protective shell 10 can resist corrosion caused by scale generated in the water heater due to long-term use.

[0025] When the utility model is in use, the protective shell 10 needs to be installed on the sensor first, and the through hole opened on the protective shell 10 is used to dock the installation column 6 into the through hole opened on the protective shell 10, and the stator 9 clamps the protective shell 10, thereby completing the installation of the protective shell 10, and then the sensor is installed on the water heater through the thread opened on the metal back seat 1, and the temperature measurement is achieved through the thermistor 4 set at the front end of the stainless steel tube 3. As the water heater is used for a long time, scale will accumulate inside the water heater. Therefore, the material of the protective shell 10 and the setting position of the corrosion-resistant layer on the protective shell 10 are used to protect the temperature sensor so that it can be used normally for a long time.

[0026] The above description is only an embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A sealing structure of a high-precision NTC temperature sensor for a large commercial water heater, comprising a metal back seat (1), characterized in that: A connector (2) is installed at one end of the metal back seat (1); a first installation groove (5) is provided inside the metal back seat (1); a stainless steel pipe (3) is installed at the center of the first installation groove (5); a thermistor (4) is installed at one end of the stainless steel pipe (3) away from the metal back seat (1); installation columns (6) are symmetrically installed inside the first installation groove (5); a second installation groove (7) is provided on the side of the installation column (6); a spring (8) is installed inside the second installation groove (7); a stator (9) is installed at one end of the spring (8); and a protective shell (10) is provided inside the first installation groove (5).

2. The sealing structure of a high-precision large-scale commercial water heater NTC temperature sensor according to claim 1 is characterized in that: An opening through which the stainless steel pipe (3) penetrates is formed at one end of the protective shell (10) away from the metal rear seat (1).

3. The sealing structure of a high-precision large-scale commercial water heater NTC temperature sensor according to claim 1 is characterized in that: A through hole matching the size of the mounting column (6) and the stator (9) is provided at one end of the protective shell (10) close to the metal rear seat (1), and the through hole extends and passes through the side surface of the protective shell (10).

4. The sealing structure of a high-precision NTC temperature sensor for large commercial water heaters according to claim 1, characterized in that: The outer surface of the protective shell (10) at one end away from the metal rear seat (1) is provided with a corrosion-resistant layer.

5. The sealing structure of a high-precision NTC temperature sensor for large commercial water heaters according to claim 1, characterized in that: The wiring of the thermistor (4) is placed through the interior of the stainless steel tube (3), and an insulating layer is provided inside the stainless steel tube (3).

6. The sealing structure of a high-precision NTC temperature sensor for large commercial water heaters according to claim 1, characterized in that: The protective shell (10) is made of acid-resistant steel.

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