High-precision NTC temperature sensor for large commercial water heater

Abstract

The utility model discloses a high-precision large-scale commercial water heater NTC temperature sensor comprising a metal rear seat, the bottom end of the outer surface of the metal rear seat is provided with a colloid sucking disc, the top end of the outer surface of the metal rear seat is symmetrically provided with clamping seats, the clamping seats are internally provided with pressing rods in a sliding manner, the bottom of each pressing rod is provided with a pressing block, and the pressing blocks are provided with clamping grooves. A mounting hole is formed in the inner wall of the clamping seat, a spring is mounted in the mounting hole, and a stator is mounted at one end of the spring. The slidable pressing rod is combined with the stator for use, the pressing rod can press the rubber suction cup, the rubber suction cup can be adsorbed to the surface of the water heater, the sealing performance of the joint of the water heater and the metal rear seat is kept, and the situation that the sensor is difficult to detach and replace due to corrosion caused by a humid environment is avoided.

Description

Technical Field

[0001] The utility model relates to the field of temperature sensors, in particular to a high-precision NTC temperature sensor for large commercial water heaters. 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] Therefore, in the water heater, the temperature of the hot water in the water heater is measured by using a temperature sensor, and a signal is output to transmit the temperature information. However, water vapor is generated when the water heater discharges water. If the place is poorly ventilated, the environment becomes humid. If it is in a humid environment for a long time, the connection between the sensor and the water heater will be corroded, causing the sensor to be disassembled for replacement or maintenance. Utility Model Content

[0004] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a high-precision large-scale commercial water heater NTC temperature sensor, including a metal back seat, a colloid suction cup is installed at the bottom end of the outer surface of the metal back seat, a card seat is symmetrically installed at the top end of the outer surface of the metal back seat, a pressure rod is slidably installed inside the card seat, a pressure block is installed at the bottom of the pressure rod, a mounting hole is opened on the inner wall of the card seat, a spring is installed inside the mounting hole, a stator is installed at one end of the spring, a connector is installed at one end of the metal back seat, a stainless steel pipe is installed at the other end of the metal back seat, a thermistor is installed at one end of the stainless steel pipe, and a protective cover is provided on the outer surface of the stainless steel pipe.

[0005] The utility model is further configured such that the wiring of the thermistor is placed inside a stainless steel tube, and an insulating layer having a thickness of not less than 1.2 mm is provided inside the stainless steel tube, and the insulating layer is provided to avoid the occurrence of a short circuit.

[0006] The utility model is further configured that a through hole matching the stator is opened on the outer surface of the pressure rod, and the elastic force of the spring causes the stator to enter the through hole to achieve positioning of the pressure rod.

[0007] The utility model is further configured that the pressing block is in the shape of an arc-shaped block and is located above the colloid suction cup, so that the pressing block can press the colloid suction cup and cover most of the colloid suction cup.

[0008] The utility model is further configured such that the protective sleeve is disposed on the stainless steel pipe at a connection between the stainless steel pipe and the metal back seat, thereby preventing the connection between the stainless steel pipe and the metal back seat from being corroded.

[0009] The utility model is further configured that a thread is provided on the outer surface of the metal back seat near the position of the stainless steel pipe so that the sensor can be integrally installed on the water heater.

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

[0011] 1. The utility model uses a slidable pressure rod in combination with a stator, so that the pressure rod can press the colloid suction cup, so that the colloid suction cup can be adsorbed on the surface of the water heater, thereby maintaining the sealing of the connection between the water heater and the metal back seat, avoiding corrosion caused by a humid environment, which makes it difficult to remove and replace the sensor;

[0012] 2. The utility model provides a protective sleeve on the stainless steel pipe, and due to the location of the protective sleeve, it also prevents the connection between the stainless steel pipe and the metal back seat from being damaged by scale generated inside the water heater, thereby avoiding the occurrence of a short circuit due to damage to the stainless steel pipe. 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 for Figure 2 A schematic diagram of the enlarged structure in the middle.

[0016] In the figure: 1. Metal back seat; 2. Rubber suction cup; 3. Card seat; 4. Pressure rod; 5. Pressure block; 6. Mounting hole; 7. Spring; 8. Stator; 9. Connector; 10. Stainless steel tube; 11. Thermistor; 12. Protective cover. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figures 1 to 3A high-precision large-scale commercial water heater NTC temperature sensor comprises a metal back seat 1, a colloid suction cup 2 is installed at the bottom end of the outer surface of the metal back seat 1, a card seat 3 is symmetrically installed at the top end of the outer surface of the metal back seat 1, a pressure rod 4 is slidably installed inside the card seat 3, a pressure block 5 is installed at the bottom of the pressure rod 4, a mounting hole 6 is opened on the inner wall of the card seat 3, a spring 7 is installed inside the mounting hole 6, a stator 8 is installed at one end of the spring 7, a connector 9 is installed at one end of the metal back seat 1, a stainless steel tube 10 is installed at the other end of the metal back seat 1, a thermistor 11 is installed at one end of the stainless steel tube 10, and a protective cover 12 is provided on the outer surface of the stainless steel tube 10.

[0019] The wiring of the thermistor 11 is placed inside the stainless steel tube 10 , and an insulating layer with a thickness of not less than 1.2 mm is provided inside the stainless steel tube 10 , so as to avoid short circuit.

[0020] like Figure 3 As shown, the outer surface of the pressure rod 4 is provided with a through hole matching the stator 8, so that when the pressure rod 4 slides down and the stator 8 enters the through hole opened on the pressure rod 4, the stator 8 enters the through hole with the help of the elastic force of the spring 7, thereby realizing the positioning of the pressure rod 4.

[0021] like Figure 1 As shown, the pressing block 5 is in the shape of an arc block and is located above the glue suction cup 2, so that the pressing block 5 can press the glue suction cup 2 and cover most of the glue suction cup 2 when it moves downward.

[0022] The protective sleeve 12 is disposed at the stainless steel tube 10 at the connection between the stainless steel tube 10 and the metal back seat 1, and also prevents the connection between the stainless steel tube 10 and the metal back seat 1 from being corroded.

[0023] The outer surface of the metal back seat 1 is provided with threads near the stainless steel tube 10 , and the threads are provided to facilitate the installation of the sensor as a whole on the water heater.

[0024] When the utility model is in use, the temperature sensor is installed in the installation hole 6 opened on the water heater through the provided thread, and the colloid suction cup 2 is pressed on the surface of the water heater by the sliding pressure rod 4. As the pressure rod 4 slides, when the through hole opened on the pressure rod 4 moves to the front and rear of the stator 8, the stator 8 enters the through hole opened on the surface of the pressure rod 4, and the position of the pressure rod 4 is positioned, so that the pressure block 5 can press the colloid suction cup 2, thereby ensuring the sealing of the connection between the metal back seat and the water heater.

[0025] 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 high-precision NTC temperature sensor for large commercial water heaters, comprising a metal back seat (1), characterized in that: A rubber suction cup (2) is installed at the bottom end of the outer surface of the metal back seat (1), a card seat (3) is symmetrically installed at the top end of the outer surface of the metal back seat (1), a pressure rod (4) is slidably installed inside the card seat (3), a pressure block (5) is installed at the bottom of the pressure rod (4), a mounting hole (6) is opened on the inner wall of the card seat (3), a spring (7) is installed inside the mounting hole (6), a stator (8) is installed at one end of the spring (7), a connector (9) is installed at one end of the metal back seat (1), a stainless steel tube (10) is installed at the other end of the metal back seat (1), a thermistor (11) is installed at one end of the stainless steel tube (10), and a protective cover (12) is provided on the outer surface of the stainless steel tube (10).

2. A high-precision large commercial water heater NTC temperature sensor according to claim 1, characterized in that: The wiring of the thermistor (11) is placed inside the stainless steel tube (10), and the interior of the stainless steel tube (10) is provided with an insulating layer having a thickness of not less than 1.2 mm.

3. A high-precision large commercial water heater NTC temperature sensor according to claim 1, characterized in that: The outer surface of the pressure rod (4) is provided with a through hole matching the stator (8).

4. A high-precision large commercial water heater NTC temperature sensor according to claim 1, characterized in that: The pressing block (5) is in the shape of an arc-shaped block and is located above the colloid suction cup (2).

5. A high-precision large commercial water heater NTC temperature sensor according to claim 1, characterized in that: The protective sleeve (12) is disposed on the stainless steel tube (10) at a location where the stainless steel tube (10) is connected to the metal back seat (1).

6. A high-precision large commercial water heater NTC temperature sensor according to claim 1, characterized in that: The outer surface of the metal back seat (1) is provided with threads near the stainless steel pipe (10).

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