Humidity sensor

Abstract

The utility model discloses a humidity sensor, which relates to the technical field of sensors and comprises a mounting shell and a sensing element. A partition plate and a first sealing ring are arranged in the mounting shell, the interior of the mounting shell is divided into a detection area and a mounting area by the partition plate, a connecting hole is formed in the top wall, corresponding to the detection area, of the mounting shell, a clamping protrusion is arranged on the inner side wall of the mounting shell, and the clamping protrusion and the partition plate form clamping connection, so that the position of the partition plate is limited in the mounting shell; the first sealing ring is arranged on the side, opposite to the clamping protrusion, of the partition plate, and a communication channel is formed in the side wall, corresponding to the installation area, of the installation shell and used for connecting external equipment with equipment in the installation area. The sensing element penetrates through the partition plate and is installed on the partition plate. The mounting area is used for arranging a circuit board and other elements, and wet air can be detected by the detection area through the partition plate and cannot enter the mounting area to erode electronic elements, so that the electronic elements in the humidity sensor are protected, and the durability of the humidity sensor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of sensors, and in particular to a humidity sensor. Background Art

[0002] Humidity sensors, as an essential tool for measuring ambient humidity, are widely used not only in industry, agriculture, and healthcare, but also in high-temperature cooking applications, including ovens, steamers, oven-steamers, air fryers, microwave ovens, and microwave-steamers. The development of humidity sensors not only plays a key role in environmental monitoring and production process control, but also provides essential data support for refined equipment management. As application demand continues to grow, market requirements for humidity sensor performance, ease of installation, and stability are becoming increasingly stringent.

[0003] Utility model patent announcement number CN220854724U discloses an absolute humidity sensor, which includes a housing, a bottom cover, an unsealed thermistor assembly, and a sealed thermistor assembly. The bottom cover is connected to the bottom of the housing, forming a cavity between the bottom cover and the housing. The unsealed thermistor assembly and the sealed thermistor assembly are mounted in the cavity between the bottom cover and the housing. A first mounting plate is provided on each side of the housing, each having a first mounting hole defined thereon. A second mounting plate is provided on each side of the bottom cover, each having a second mounting hole defined thereon corresponding to the first mounting hole. Mounting nuts are threadedly connected to each end of a mounting bolt. The housing and the bottom cover are assembled together, and the mounting bolt is passed through the first and second mounting holes. Two mounting nuts are installed on each end of the mounting bolt, securing the housing and the bottom cover. When the housing and the bottom cover need to be separated to inspect and maintain components within the sensor, the mounting nuts are detached from the mounting bolts, facilitating disassembly of the sensor. Humidity sensors require humid gas to flow into the sensor to detect humidity. Therefore, the electronic components in the sensor will be corroded by the humid air. Sensors without internal protection devices are difficult to cope with the corrosion of humid air, resulting in poor durability of the electronic components in the sensor. Summary of the Invention

[0004] In order to solve the problem that the humidity sensor cannot protect the internal electronic components from being corroded by humid air, the purpose of this application is to provide a humidity sensor.

[0005] The humidity sensor provided in this application adopts the following technical solution:

[0006] A humidity sensor comprising:

[0007] The installation shell is provided with a partition plate and a first sealing ring inside. The partition plate divides the interior of the installation shell into a detection area and an installation area. A connection hole is provided on the top wall of the installation shell corresponding to the detection area. The inner side wall of the installation shell has a snap-fitting protrusion. The snap-fitting protrusion forms a snap-fitting connection with the partition plate to limit the position of the partition plate in the installation shell. The first sealing ring is provided on the side of the partition plate opposite to the snap-fitting protrusion. A connecting channel is provided on the side wall of the installation shell corresponding to the installation area for connecting external equipment with equipment in the installation area;

[0008] The sensing element passes through the partition plate and is installed on the partition plate.

[0009] By adopting the above technical solution, the snap-on protrusion limits the position of the partition plate on the inner side of the mounting shell, and fixes the partition plate through the first sealing ring, as well as sealing the gap between the partition plate and the mounting shell. The partition plate divides the interior of the mounting shell into a detection area and an installation area. The sensing element passes through the partition plate. The part in the installation area can detect the humid air entering the sensor through the connection hole to achieve the purpose of detecting humidity, while the part of the sensing element located in the installation area can be connected to the remaining electronic components. The installation area is used to set up other components such as circuit boards. The partition plate allows humid air to be detected in the detection area while preventing it from entering the installation area to corrode the electronic components, thereby protecting the electronic components in the humidity sensor and improving the durability of the humidity sensor. The connecting channel is used for external devices to connect to the electronic components in the installation area. The connecting channel can make the electrical connection of the sensor more stable.

[0010] Optionally, the mounting shell includes a top cover and a bottom cover, the connecting hole is provided on the top surface of the top cover, and the connecting channel is provided on the side surface of the bottom cover.

[0011] By adopting the above technical solution, the top cover and the bottom cover can be separated, so that the installation of various components inside the installation shell can be conveniently performed. The installation area corresponding to the connection hole is set in the top cover, and the installation area corresponding to the connection channel is set near the bottom cover.

[0012] Optionally, the sensing element includes a humidity sensor and a contrast sensor.

[0013] By adopting the above technical solution, the humidity sensor can detect the absolute humidity in the air, while the measurement of relative humidity requires reference to the saturated vapor pressure. Since the saturated vapor pressure changes with temperature, a comparison sensor is provided to measure the reference humidity at different temperatures, so that the humidity sensor can measure not only absolute humidity but also relative humidity.

[0014] Optionally, the top cover is provided with a first connecting piece, and the bottom cover is provided with a second connecting piece, and the first connecting piece and the second connecting piece fit together to connect and fix the top cover and the bottom cover.

[0015] By adopting the above technical solution, the first connecting member and the second connecting member are connected to fix the top cover and the bottom cover, and quick connection and quick separation can be achieved through the first connecting member and the second connecting member.

[0016] Optionally, the number of the first connecting members is four and they are evenly distributed on the edge of the top cover, and the number of the second connecting members is correspondingly four and they are evenly distributed on the edge of the bottom cover.

[0017] By adopting the above technical solution, the four evenly distributed first connecting members and second connecting members can increase the stability of the connection between the top cover and the bottom cover, ensuring the normal use of the sensor.

[0018] Optionally, a limiting piece is further provided on the edge of the top cover, and the limiting piece is used to limit the position of the bottom cover relative to the top cover.

[0019] By adopting the above technical solution, the limiting piece is used to limit the relative position between the top cover and the bottom cover when the first connecting member and the second connecting member are not connected, thereby facilitating the installation between the bottom cover and the top cover.

[0020] Optionally, the connecting passage is provided with a plurality of line openings for lines to enter the connecting passage from different angles.

[0021] By adopting the above technical solution, since the direction of the connecting channel is fixed, the line opening is provided so that the line can enter the connecting channel from different angles, which is beneficial to the electrical connection between the sensor and the external device.

[0022] Optionally, the sensing element is provided with a lead wire, and the lead wire extends to the outside of the mounting housing.

[0023] By adopting the above technical solution, the lead wire is used to transmit the electrical signal generated by the sensing element, and by extending to the outside of the mounting shell, the lead wire can transmit the signal to the external device, thereby improving applicability.

[0024] Optionally, the sensing element and the partition plate are directly provided with a second sealing ring.

[0025] By adopting the above technical solution, the second sealing ring can seal the gap between the sensing element and the partition plate, thereby improving the sealing performance, preventing water vapor from entering the installation area, and improving the durability of the humidity sensor.

[0026] In summary, this application includes at least one of the following beneficial technical effects:

[0027] 1. The snap-fit ​​protrusion snaps the partition plate onto the inner side of the mounting housing. The partition plate divides the interior of the mounting housing into a detection area and a mounting area. The sensing element passes through the partition plate. The portion in the mounting area can detect moist air entering the sensor through the connection hole to achieve the purpose of detecting humidity. The portion of the sensing element in the mounting area can be connected to other electronic components. The mounting area is used to place other components such as circuit boards. The partition plate allows moist air to be detected in the detection area while preventing it from entering the mounting area and corroding the electronic components, thereby protecting the electronic components in the humidity sensor and improving its durability.

[0028] 2. The top cover and the bottom cover can be separated, so that the components can be easily installed inside the housing. The installation area corresponding to the connection hole is set in the top cover, and the installation area corresponding to the connection channel is set near the bottom cover. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application;

[0030] Figure 2 This is a schematic diagram of the explosion structure of an embodiment of the present application;

[0031] Figure 3 It is a schematic cross-sectional structural diagram of an embodiment of the present application.

[0032] Figure numerals: 1. Mounting shell; 11. Top cover; 11a. Snap-on protrusion; 12. Bottom cover; 13. Detection area; 14. Mounting area; 15. Connection hole; 16. Connection channel; 16a. Line port; 17. First connecting member; 18. Second connecting member; 19. Limiting piece; 2. Partition plate; 3. Sensing element; 31. Humidity sensor; 32. Contrast sensor; 33. Lead; 4. First sealing ring; 5. Second sealing ring. DETAILED DESCRIPTION

[0033] The present application is further described in detail below with reference to the accompanying drawings.

[0034] A humidity sensor, referring to Figure 1 and Figure 2, including a mounting shell 1, a partition plate 2, a sensing element 3 and a first sealing ring 4. The partition plate 2 and the first sealing ring 4 are arranged in the mounting shell 1, and the partition plate 2 divides the internal space of the mounting shell 1 into a detection area 13 and an installation area 14. The mounting shell 1 includes a top cover 11 and a bottom cover 12, and the top cover 11 and the bottom cover 12 can be separated from each other. A first connecting member 17 is provided at the edge of the top cover 11, and a second connecting member 18 is provided at the edge of the bottom cover 12. The first connecting member 17 and the second connecting member 18 are connecting pieces with holes, and both are four in number, evenly distributed on the edges of the top cover 11 and the bottom cover 12. Through the connection of the first connecting member 17 and the second connecting member 18, the stability of the connection between the top cover 11 and the bottom cover 12 is increased, thereby ensuring the normal use of the sensor. The edge of the top cover 11 is also connected to a limiting piece 19, which extends toward the bottom cover 12. When the bottom cover 12 and the top cover 11 are not connected, the limiting piece 19 limits the relative position between the top cover 11 and the bottom cover 12, thereby facilitating the installation between the bottom cover 12 and the top cover 11.

[0035] Reference Figure 1 and Figure 3 The partition plate 2 is disposed within the top cover 11. The edge of the top cover 11 is provided with an inwardly recessed snap-in protrusion 11a, which confines the partition plate 2 within the top cover 11. A first sealing ring 4 seals and secures the partition plate 2 from the other side, thereby isolating the upper portion of the top cover 11 from the partition plate 2 to form a detection zone 13. The area of ​​the top cover 11 below the partition plate 2 and the area within the bottom cover 12 constitute the installation zone 14. A sensing element 3 is mounted on the partition plate 2 to detect air entering the detection zone 13. A second sealing ring 5 is provided between the sensing element 3 and the partition plate 2 to seal the gap between the sensing element 3 and the partition plate 2, preventing moisture from entering the installation zone 14. A connection hole 15 is provided on the top wall of the top cover 11 corresponding to the detection area 13. The connection hole 15 allows external air to enter the detection area 13, so that the sensing element 3 installed on the partition plate 2 can detect the air, and the partition plate 2 can isolate the air in the detection area 13, thereby protecting the electronic components installed in the installation area 14 and improving the durability of the sensor. A connecting channel 16 is provided on the side wall of the installation shell 1 corresponding to the installation area 14, for the circuit to enter the installation area 14, so that the external equipment can be electrically connected to the electronic components in the installation area 14. The connecting channel 16 is provided with multiple circuit ports 16a. Since the direction of the connecting channel 16 is fixed, the circuit is allowed to enter the connecting channel 16 from different angles by providing the circuit ports 16a, which is beneficial to the electrical connection between the sensor and the external equipment. By isolating the detection area 13 from the installation area 14, the stability and working reliability of the humidity sensor are significantly improved.

[0036] Reference Figure 2Sensing element 3 includes a humidity sensor 31 and a contrast sensor 32, each mounted within partition plate 2. This allows the humidity sensor to detect not only absolute humidity but also relative humidity, broadening its applicability. A lead 33 is connected below sensing element 3. Lead 33 transmits detection information via electrical signals. Lead 33 extends to the outside of bottom cover 12, enabling it to transmit signals to external devices, improving applicability.

[0037] The working principle of this embodiment is as follows: by securing the space within the mounting housing 1 with the snap-fit ​​protrusion 11a and the first sealing ring 4 within the top cover 11, the space within the mounting housing 1 is partitioned. This prevents air entering the detection zone 13 from corroding the electronic components within the mounting zone 14, thereby improving the durability of the sensor. Furthermore, a sensing element 3 is provided on the partition plate 2, enabling it to detect air within the detection zone 13 and transmit the detection results via electrical signals to components within the mounting zone 14 or equipment outside the mounting housing 1, thereby improving the applicability of the sensor.

[0038] The examples of this specific embodiment are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, any equivalent changes made based on the structure, shape, and principle of this application should be included in the scope of protection of this application.

Claims

1. A humidity sensor, characterized in that: include: The installation shell (1) is provided with a partition plate (2) and a first sealing ring (4) inside. The partition plate (2) divides the interior of the installation shell (1) into a detection area (13) and an installation area (14). A connection hole (15) is provided on the top wall of the installation shell (1) corresponding to the detection area (13). The inner side wall of the installation shell (1) has a snap-fitting protrusion (11a). The snap-fitting protrusion (11a) is snap-fitted with the partition plate (2) to limit the position of the partition plate (2) in the installation shell (1). The first sealing ring (4) is provided on a side of the partition plate (2) opposite to the snap-fitting protrusion (11a). A connecting channel (16) is provided on the side wall of the installation shell (1) corresponding to the installation area (14) for connecting external equipment with equipment in the installation area (14); The sensing element (3) passes through the partition plate (2) and is installed on the partition plate (2).

2. A humidity sensor according to claim 1, characterized in that: The mounting shell (1) comprises a top cover (11) and a bottom cover (12), the connection hole (15) is provided on the top surface of the top cover (11), and the connection channel (16) is provided on the side surface of the bottom cover (12).

3. A humidity sensor according to claim 1, characterized in that: The sensing element (3) comprises a humidity sensor (31) and a contrast sensor (32).

4. A humidity sensor according to claim 2, characterized in that: The top cover (11) is provided with a first connecting piece (17), and the bottom cover (12) is provided with a second connecting piece (18). The first connecting piece (17) and the second connecting piece (18) are matched with each other and are used to connect and fix the top cover (11) and the bottom cover (12).

5. A humidity sensor according to claim 4, characterized in that: The number of the first connecting members (17) is four and they are evenly distributed on the edge of the top cover (11); the number of the second connecting members (18) is correspondingly four and they are evenly distributed on the edge of the bottom cover (12).

6. The humidity sensor according to claim 2, characterized in that: The edge of the top cover (11) is further provided with a limiting piece (19), and the limiting piece (19) is used to limit the position of the bottom cover (12) relative to the top cover (11).

7. The humidity sensor according to claim 1, characterized in that: The connecting passage (16) is provided with a plurality of line openings (16a) for lines to enter the connecting passage (16) from different angles.

8. The humidity sensor according to claim 1, characterized in that: The sensing element (3) is provided with a lead (33), and the lead (33) extends to the outside of the mounting housing (1).

9. The humidity sensor according to claim 1, characterized in that: The sensing element (3) and the partition plate (2) are directly provided with a second sealing ring (5).

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