Active cooling type pressure sensor

Abstract

The utility model relates to the related technical field of pressure sensors, in particular to an active cooling type pressure sensor, the outer side surface of a shell is fixedly connected with a cushion, the upper surface of the cushion is fixedly connected with a tray, and the upper surface of the tray is connected with a pressure sensor in a clamping manner; and the inner side surface of the shell is fixedly connected with a pressure sensing chip. According to the active cooling type pressure sensor, after reaching the sensing chip and being processed by the sensing chip, the signals are converted into electric signals, the electric signals are transmitted to the pressure sensor through the signal processing circuit, and cooling liquid is infused from the water inlet, reaches the water inlet tank from the connecting pipe and then flows towards the water return tank through the threaded pipe; and finally, the cooling liquid is discharged from the water outlet through the connecting pipe, the pressure sensor is cooled, and the temperature can be controlled by replacing different cooling liquid.

Description

Technical Field

[0001] The utility model relates to the technical field related to pressure sensors, in particular to an active cooling pressure sensor. Background Art

[0002] A pressure sensor is a device or apparatus that can sense pressure signals and convert them into usable output electrical signals according to certain rules. A pressure sensor is usually composed of a pressure sensitive element and a signal processing unit. According to different test pressure types, pressure sensors can be divided into gauge pressure sensors, differential pressure sensors and absolute pressure sensors. Pressure sensors are the most commonly used sensors in industrial practice. They are widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent buildings, production automatic control, aerospace, military industry, petrochemicals, oil wells, electric power, ships, machine tools, pipelines and many other industries. Because temperature will be generated during detection, actively cooled pressure sensors are particularly needed.

[0003] However, when existing pressure sensors are detecting pressure, the temperature may be too high, which may damage the pressure sensors and cause inaccurate data detected by the pressure sensors. Alternatively, the cooling effect may not be obvious and the temperature drop cannot be controlled, resulting in inaccurate detection data. Utility Model Content

[0004] The purpose of the utility model is to provide an actively cooled pressure sensor to solve the problem that the existing pressure sensor proposed in the above background technology may be damaged due to excessively high temperature when detecting pressure, which may lead to inaccurate data detected by the pressure sensor, or the cooling effect is not obvious and the temperature drop cannot be controlled, resulting in inaccurate detection data.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: an actively cooled pressure sensor, comprising a shell, a cushion fixedly connected to the outer surface of the shell, a tray fixedly connected to the upper surface of the cushion, a pressure sensor snap-connected to the upper surface of the tray, a pressure sensing chip fixedly connected to the inner surface of the shell, a signal processing circuit fixedly connected to the upper surface of the pressure sensing chip, a water inlet tank fixedly connected to the lower surface of the pressure sensing chip, a threaded pipe fixedly connected to the lower surface of the water inlet tank, a return water tank fixedly connected to the lower surface of the threaded pipe, a connecting pipe fixedly connected to one side surface of the return water tank, a water inlet opening formed on one side surface of the water inlet tank, a water outlet opening formed on one side surface of the return water tank, a connecting hoop fixedly connected to the outer surface of the shell, and a pressure inlet hole formed on the lower surface of the shell.

[0006] Preferably, the inner wall size of the tray matches the outer wall size of the pressure sensor, and the inner wall size of the shell matches the outer wall size of the pressure sensing chip.

[0007] Preferably, the inner wall size of the water inlet matches the outer wall size of the connecting pipe, and the inner wall size of the water outlet matches the outer wall size of the connecting pipe.

[0008] Preferably, one end of the threaded pipe is connected to a water inlet tank, and one end of the threaded pipe is connected to a water return tank.

[0009] Preferably, the pressure inlet holes penetrate the return water tank and the water inlet tank, and the connecting pipes are respectively arranged at the return water tank and the water inlet tank.

[0010] Compared with the prior art, the beneficial effects of the utility model are: the active cooling pressure sensor, the existing products are generally of two types, one is to use a core that is more resistant to high temperatures, and the other is to add a cooling ring for passive heat dissipation. Both of these are not very intelligent and have a limited temperature range. The above-mentioned active cooling pressure transmitter can perform closed-loop adjustment on the selection of cooling medium, flow rate, and cooling effect according to different temperatures. The operating temperature can be greatly reduced and the designability is strong. It can not only cool down, but also actively keep warm and melt ice and other functions. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the overall appearance structure of the utility model;

[0012] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0013] Figure 3 This is a schematic diagram of the structure of the water inlet box and the threaded pipe cooperating with each other in the utility model;

[0014] Figure 4 This is a schematic diagram of the structure of the pressure sensor and the pressure sensing chip cooperating with each other in the utility model.

[0015] In the figure: 1. Shell; 2. Mat; 3. Tray; 4. Pressure sensor; 5. Pressure sensing chip; 6. Signal processing circuit; 7. Water inlet tank; 8. Threaded pipe; 9. Return water tank; 10. Connecting pipe; 11. Water inlet; 12. Water outlet; 13. Connecting hoop; 14. Pressure inlet hole. DETAILED DESCRIPTION

[0016] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0017] See also Figure 1-4 The utility model provides a technical solution: an actively cooled pressure sensor, comprising a shell 1, a cushion 2 is fixedly connected to the outer surface of the shell 1, a tray 3 is fixedly connected to the upper surface of the cushion 2, a pressure sensor 4 is snap-connected to the upper surface of the tray 3, a pressure sensing chip 5 is fixedly connected to the inner surface of the shell 1, a signal processing circuit 6 is fixedly connected to the upper surface of the pressure sensing chip 5, a water inlet tank 7 is fixedly connected to the lower surface of the pressure sensing chip 5, a threaded pipe 8 is fixedly connected to the lower surface of the water inlet tank 7, a return water tank 9 is fixedly connected to the lower surface of the threaded pipe 8, a connecting pipe 10 is fixedly connected to one side surface of the return water tank 9, a water inlet 11 is provided on one side surface of the water inlet tank 7, a water outlet 12 is provided on one side surface of the return water tank 9, and a connecting hoop 13 is fixedly connected to the outer surface of the shell 1. A pressure inlet hole 14 is provided on the lower surface of the shell 1. Through the arrangement of the shell 1, the cushion 2, the tray 3, the pressure sensor 4, the pressure sensing chip 5, the signal processing circuit 6, the water inlet tank 7, the threaded pipe 8, the return water tank 9, the connecting pipe 10, the water inlet 11, the water outlet 12, the connecting hoop 13 and the pressure inlet hole 14, when working, the pressure enters through the pressure inlet hole 14 and reaches the sensing chip 5. The sensing chip 5 converts the pressure into an electrical signal after processing. The electrical signal is transmitted to the pressure sensor 4 through the signal processing circuit 6. The coolant is injected from the water inlet 11, and the coolant reaches the water inlet tank 7 from the connecting pipe 10. Then, the coolant flows to the return water tank 9 through the threaded pipe 8, and is finally discharged from the water outlet 12 through the connecting pipe 10 to cool the pressure sensor 4. The temperature can be controlled by replacing different coolants.

[0018] Furthermore, the inner wall size of the tray 3 matches the outer wall size of the pressure sensor 4, and the inner wall size of the shell 1 matches the outer wall size of the pressure sensing chip 5. Through the setting of the pressure sensing chip 5, the sensed pressure value can be converted into an electrical signal and transmitted to the signal processing circuit 6.

[0019] Furthermore, the inner wall size of the water inlet 11 matches the outer wall size of the connecting pipe 10, and the inner wall size of the water outlet 12 matches the outer wall size of the connecting pipe 10. Through the setting of the water inlet 11, the coolant can be injected into the water inlet tank 7 to perform cooling work.

[0020] Furthermore, one end of the threaded tube 8 is connected to the water inlet tank 7, and one end of the threaded tube 8 is connected to the water return tank 9. Through the setting of the threaded tube 8, the falling speed of the coolant can be slowed down and the temperature of the shell 1 can be reduced.

[0021] Furthermore, the pressure inlet holes 14 penetrate the return water tank 9 and the water inlet tank 7, and the connecting pipes 10 are respectively arranged at the return water tank 9 and the water inlet tank 7. Through the arrangement of the pressure inlet holes 14, the pressure can reach the pressure sensing chip 5 for pressure detection.

[0022] Working principle: The pressure transmitter or pressure sensor 4 generally converts the physical quantity of pressure into an electrical signal through a pressure-sensitive diaphragm or core, and the electrical signal is then transmitted to the processing circuit to be converted into a standard industrial signal. However, in this process, it is exposed to a variety of media with different temperatures. If the temperature exceeds a certain value, the general civilian core and circuit are -20 to 85 degrees, and the industrial temperature is -20 to 125 degrees. If the temperature is higher, only heat dissipation rings and other devices can be added, but the effect is general, and the continuous accumulation of heat can be easily brought out. An active cooling method is now designed. When the medium temperature is too high, it may damage the measuring core and circuit. Now an active spiral air hole is added between the pressure inlet hole and the pressure-sensitive diaphragm and the core, and coolant is added between the water inlet 11 and the water outlet 12. Cooling media of different temperatures can be selected according to different medium temperatures to actively circulate and cool down, so that the medium in the pressure inlet hole does not exceed the operating temperature range of the pressure-sensitive core.

[0023] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An actively cooled pressure sensor, comprising a housing (1), characterized in that: The outer surface of the shell (1) is fixedly connected to a cushion (2), the upper surface of the cushion (2) is fixedly connected to a tray (3), the upper surface of the tray (3) is snap-connected to a pressure sensor (4), the inner surface of the shell (1) is fixedly connected to a pressure sensing chip (5), the upper surface of the pressure sensing chip (5) is fixedly connected to a signal processing circuit (6), the lower surface of the pressure sensing chip (5) is fixedly connected to a water inlet tank (7), the lower surface of the water inlet tank (7) is fixedly connected to a threaded pipe (8), the lower surface of the threaded pipe (8) is fixedly connected to a return water tank (9), one side surface of the return water tank (9) is fixedly connected to a connecting pipe (10), one side surface of the water inlet tank (7) is provided with a water inlet (11), one side surface of the return water tank (9) is provided with a water outlet (12), the outer surface of the shell (1) is fixedly connected to a connecting hoop (13), and the lower surface of the shell (1) is provided with a pressure inlet hole (14).

2. The actively cooled pressure sensor according to claim 1, characterized in that: The inner wall size of the tray (3) matches the outer wall size of the pressure sensor (4), and the inner wall size of the housing (1) matches the outer wall size of the pressure sensing chip (5).

3. The actively cooled pressure sensor according to claim 1, characterized in that: The inner wall size of the water inlet (11) matches the outer wall size of the connecting pipe (10), and the inner wall size of the water outlet (12) matches the outer wall size of the connecting pipe (10).

4. The actively cooled pressure sensor according to claim 1, characterized in that: One end of the threaded pipe (8) is connected to a water inlet tank (7), and one end of the threaded pipe (8) is connected to a water return tank (9).

5. The actively cooled pressure sensor according to claim 1, characterized in that: The pressure inlet holes (14) penetrate the return water tank (9) and the water inlet tank (7), and the connecting pipes (10) are respectively arranged at the return water tank (9) and the water inlet tank (7).

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