WO2007009304A1 - Displacement pressure sensor - Google Patents

Abstract

A displacement pressure sensor comprises a slender and sealed outer tube which is provided with a tube joint on its bottom, an inner tube which is disposed at the center of the outer tube and is sealed at one end of the inner tube, a floater with a built-in permanent magnet which rings the inner tube and is freely movable up and down along the inner tube, and a dry reed which is arranged in the inner tube. There is a sealed space between the outer and the inner tube.

Description

 Displacement pressure sensor

 The invention relates to a pressure sensor. In particular, it is a displacement type pressure sensor suitable for use in an electrolytic ozone generator.

technical background

 An electrolytic ozone generator is one of the generators for preparing ozone. Electrolytic ozone generators made from pure water are advanced. Referring to Fig. 1, the electrolytic ozone generator generally comprises a raw material pure water tank 2, an electrolytic ozone generator 4, an anode gas outlet port 1 on the raw material pure water tank, and a connection between the ozone generator 4 and the raw material pure water tank 2. The water circulation pipe consists of 5 roads.

 The device is a closed system that constitutes a closed system if the anode tank outlet and the water circulation line are closed after the anode gas outlet is closed. The closed system can work under a certain pressure, but generally can not exceed the pressure of several kilograms per square centimeter, otherwise it will cause damage to the ion exchange membrane inside the pure water tank and the electrolytic ozone generator, which needs to be on the system. Set a pressure sensor to ensure that the working pressure of the system does not exceed a certain range. However, due to the limited installation space in the electrolytic ozone generating device and the economic cost, it is difficult to use the existing pressure sensor.

 Referring to Fig. 2, ozone generated by the electrolytic ozone generator is supplied from the anode gas outlet port 1 into the gas-water mixer 6 and is mixed with tap water from the water pipe 7 to generate ozone water which is discharged from the vertical water pipe 8. When a spray mixer is selected, excessive pressure will also affect the spray effect, which will affect the gas-water mixing efficiency. Therefore, the art is expected to have a pressure sensor that is sensitive in operation and low in manufacturing cost.

 In addition, the difficulty in accurately detecting pressure changes is whether the head is reliable and sensitive. Conventional pressure sensors that detect changes in pressure generally detect pressure directly, and the structure of the head is relatively complex.

Summary of the invention

It is an object of the present invention to provide a pressure sensor that is sensitive in operation, reliable in operation, and simple in structure. Rule 26 The present invention provides a displacement type pressure sensor, which comprises an elongated, closable outer tube having a pipe joint at the bottom, and a thinner inner tube which is closed at one end in the center of the outer tube. The float of the built-in permanent magnet on the inner tube is freely moved, and the reed switch provided in the inner tube; the inside of the outer tube forms a closed space with the outer portion of the inner tube.

 - According to the above technical solution, the switch of the sensor is controlled by the rise and fall of the water level in the outer tube by the float of the built-in permanent magnet provided in the outer tube and the reed switch provided in the inner tube. That is, the pressure sensor of the present invention does not directly detect the change in pressure, but indirectly detects the pressure change by detecting the displacement, and detecting the displacement amount is much simpler. Therefore, the pressure detector of the present invention has a simple structure and a very reliable action.

 The present invention will be specifically described below with reference to the drawings.

DRAWINGS

 Figure 1 is a schematic structural view of an electrolytic ozone generator;

 Figure 2 is a schematic view showing the connection of an ozone generator and a chlorine water mixer;

 Figure 3 is a diagram of the equilibrium state when there is no pressure;

 Figure 4 is a water level diagram after pressure changes.

detailed description

 Referring to Fig. 3, the sensor outer tube 1 and the electrolytic ozone generator pure water tank 9 are connected by the connecting line 6 and the bottom of the two are connected. At this time, the pure water 8 in the pure water tank 9 flows into the pressure sensor via the connecting line 6. In the sealed space between the pipe 1 and the inner pipe 2, the air in this space is compressed until the balance of the water level of the pure water tank is balanced, and the float 4 is stabilized at a certain position.

 Referring to Fig. 4, when the pressure in the pure water tank 9 of the electrolytic ozone generator is increased, the equilibrium state shown in Fig. 3 is broken, and the pure water flows into the sealed space of the outer and inner tubes 1, 2 of the pressure sensor, Continue to increase the compression of the air until a new balance is reached. The float 4 is brought up to a position higher than that shown in FIG. If the reed switch 3 in the inner tube 2 is already in the effective magnetic range of the iron 5, the reed switch 3 will act to form an output signal, and the pressure sensor is converted from a pressure change to a displacement type. Varying signal output.

3 and 4, the pure water area of the pure water tank is larger than the area inside the inner and outer tubes of the pressure sensor. The inner and outer tubes 1, 2 and the float 4 can be made of plexiglass and bonded.

 The reed switch 3 and the permanent magnet 5 are well known to those skilled in the art, and the present invention has no particular requirements.

Claims

Claim A displacement type pressure sensor comprising: an elongated, hermetic outer tube having a pipe joint at the bottom, and a thinner inner tube at one end of the center of the outer tube, freely The float of the built-in permanent magnet on the inner tube is moved, and the reed switch is disposed inside the inner tube; the inside of the outer tube forms a sealed space with the outer portion of the inner tube. Replacement page (Article 26)