How does a barometric pressure switch work What are the main uses of a barometric switch? Urgent nee

On Encyclopedia Electric**, it can be seen that the working principle of the air pressure switch is that when the pressure in the system is higher or lower than the safe pressure, the pressure sensor in the controller acts immediately, so that the contacts in the controller are connected or disconnected, and the equipment stops working at this time; When the pressure in the system returns to the safe pressure range of the device, the pressure sensor in the controller immediately resets, so that the contacts in the controller are turned on or off, and the device works normally. The air pressure switch is mainly used in air conditioning and refrigeration system, vacuum pressure control system, water pressure control system, steam pressure control system, oil and gas pressure control system, etc., to prevent the pressure in the system from being too high or too low to ensure that the system is always outside the safe working pressure range. Encyclopedia Electric** has complete information, you can consult it on Encyclopedia Electric**.

Obviously, the pressure switch gas has not been discharged, or the check valve problem, which is a common problem of air compressors, and it is more difficult.

If the repair is to be done completely, it is necessary to clean all the exhaust pipes (the carbon deposits inside are difficult to clean, and it is normal to replace them with new ones).

Replace the piston ring, which is one of the big reasons why the check valve is broken. Clean parts such as tracheal caps.

If it is really not repaired and the machine is often running, it is recommended to change it to semi-automatic. The cost is not very large, as long as you add a pressure control valve and a few small copper pipes (disadvantage: if the air consumption is small, the air compressor will also work non-stop).

What is a Pressure Switch? The pressure switch may be unfamiliar to everyone, the pressure switch is different from the general switch, it uses a pressure sensor, can achieve a more intelligent operation. Next, I will explain to you, and the characteristics of the pressure switch will be introduced to share with you, let's take a look.

What is a Pressure Switch?

The pressure switch adopts a high-precision, high-stability pressure sensor and transmission circuit, and then realizes the detection, display, alarm and control signal output of the medium pressure signal through the special CPU modular signal processing technology.

The pressure switch can be widely used in the measurement and control of gauge pressure and absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply and other fields, and is an ideal intelligent measurement and control instrument for industrial sites. Pressure switches are widely used in aerospace, aerospace and military fields, such as M1A1 tanks, Apollo spacecraft, Boeing 747, Airbus key A320, F22, F117 and other products.

The main categories of pressure switches include normally open and normally closed. The main features are:

1. It adopts inch pipe threaded quick connector or copper pipe welded installation structure, which is flexible in installation, easy to use, and does not need special installation and fixation.

2. The plug-in wire connection can be selected by the user.

3. The sealed stainless steel inductor is safe and reliable.

4. Within the pressure range, it can be manufactured according to the pressure value arbitrarily selected by the user.

The role of the pressure switch.

1. The core of Bu Moqiao's products adopts a new type of intelligent microprocessing chip, which has stable functional and practical performance.

2. LED shows the current pressure or liquid level element value.

3. The pressure or liquid level element can be set to start or stop according to your own needs.

4. The three units of four-bit LED products can be selected according to customer needs: MPA, PSI.

5. High and low pressure or liquid level alarm points can be set, and output to the control equipment through relay or optocoupler; Output dual relay (SPDT) switching quantity.

6. Two-way relay two-way optocoupler with 4 20mA 0 10V output can be selected;

7. The high-precision pressure sensor is adopted, which has higher accuracy than mechanical pressure switch, small hysteresis, fast response, stable and reliable; There is no dead zone for adjustment, and the relay action pressure point can be arbitrarily set over the entire measuring range. 8. Use the button to adjust the action pressure, which is easy to use and more flexible; Protection level: IP65, can be used in harsh environments.

How to use the pressure switch.

1. Select the pressure controller (JC-210, HNS-210) with the set value range 2. Rotate the pressure adjustment screw on the right side of the top to make the index indication at the scale ruler or 8bar), this value is the upper limit switching value.

3. Rotate the pressure adjustment screw on the left side of the top to make the index indication at the scale ruler, the lower limit switching value = the upper limit switching value - the switching pressure difference =, this value is the lower limit switching value.

The UE pressure switch in the United States is a micro switch action caused by pure mechanical deformation. When the pressure increases, the deformation of different sensing pressure components (diaphragm, bellows, pistons) will move upward, and finally activate the micro switch at the top through the mechanical structure such as the railing spring, so that the electrical signal is output. The UE pressure switch setting method is divided into continuous displacement type and force balance type from the functional principle.

The pressure switch adopts a high-precision, high-stability pressure sensor and transmission circuit, and then through a special CPU modular signal processing technology, it realizes the detection, display, alarm and control signal output of the medium pressure signal. The pressure switch can be widely used in the measurement and control of gauge pressure and absolute pressure of various gases and liquids in the fields of petroleum, chemical industry, metallurgy, electric power, water supply and other fields, and is an ideal intelligent measurement and control instrument for industrial sites. Pressure switches are widely used in aerospace and military fields, such as M1A1 tanks, Apollo spacecraft, Boeing 747, Airbus A320, F22, F117 and other products.

F&C Jiazhun Sensing Technology.

A pressure switch is a simple pressure control device. When the measured pressure reaches the rated value, the pressure switch can send out an alarm or control signal.

The working principle of the pressure switch is: when the measured pressure exceeds the rated value, the free end of the elastic element produces a displacement to push the switch element directly or after comparison, and changes the on-off state of the switch element to achieve the purpose of controlling the measured pressure.

There are normally open and normally closed switch forms.

There are two-position and three-position adjustment modes.

Hello, we are a professional pressure switch, you described this product is called dead zone adjustable, which is usually said to be 2 action points.

There are 2 sets of micro switches inside, one group controls 1 alarm point, it's as simple as that.

For example: one group of micro switches has normally open + normally closed 2 groups are double normally open + double normally closed No. 1 micro switch connected to the normally open terminal to set the P1 value No. 2 micro switch connected to the normally closed terminal to set the P2 value. When the pressure of the equipment rises to the P1 value, the pressure switch action, the normally open terminal is closed and the power supply is turned on, and the bag is sucked, and when the pressure reaches the P2 value, the switch is moved, and the normally closed terminal is disconnected and the power supply is cut off, and the bag is not sucked.

Our company is Chongqing Carvert Measurement and Control Instrument, if you have any questions about pressure switches, please feel free to come to consult

I don't want your points, I know you won't give it, you take the pressure switch apart, you don't know it at a glance, it is the air pressure of the space, the vacuum pump is of course negative pressure, adsorption, there is not a screw at the bottom of the pressure switch. Inside is a hollow rubber cavity. There is a micro switch attached to it.

When the vacuum is sucked, the space becomes smaller, and the deformation drives the switch action. Of course, the suction reaches the maximum value of the switch, and the switch is disconnected. That's how it works.

If you don't understand it yet, this thing is prone to breakage. You take apart a bad one, look at the internal structure, and you know everything, better than others say. Good words are.

If you don't understand, take it apart and see it. See something like this later. You don't have to think about it to know what's going on.

Depending on your packaging requirements, setting the pressure stroke control will solve the problem.

It may be better to be able to provide a diagram of the device!

The structure of the pressure switch of the air compressor has been relieved of many years of doubts after reading it!

Differential pressure e68a8462616964757a686964616f31333365663538"> switch is a special type of control switch, which is a type of switch that controls the switch, closing or opening according to the pressure difference between the parts and relying on the electrical signal for information transmission. Differential pressure switches are also special switches that belong to pressure switches.

When the differential pressure switch is operated and controlled, it uses the pressure difference between two pipes or other components to transmit the signal, and its main components are generally composed of two diaphragm chambers, one of which is sealed by two sealing diaphragms, and the other cavity is sealed by a differential pressure diaphragm. When the relevant properties of the high-pressure part and the low-pressure part such as gas or liquid enter the two cavities respectively, the thin film or other inductive parts on the cavity will be deformed, and the pressure difference will be generated according to the deformation information, then they will pass through the important internal mechanical structure such as the railing spring, and when the difference reaches a certain amount, the micro switch above will be touched, so that the differential pressure switch will send an electrical signal. Depending on this electrical signal, the differential pressure switch reacts to the switch, close, or shrink in and out.

The pressure switch is slightly different from the differential pressure switch, but the working principle is still to sense the pressure and perform the relevant switching operation. When the component responsible for testing and sensing detects a certain critical pressure value, the conveyor sends an electrical signal about the pressure.

When the pressure value of the relevant environment exceeds or falls below the critical pressure of safety, the induction diaphragm inside the sensor will change and vibrate, send out a control signal, and the control signal guides the switch to change, when the pressure of the environment returns to the normal critical value, the internal diaphragm will return to its original position, and the switch will automatically reset. A large number of special elastic materials such as diaphragms and bellows. There are many types of switching components, and the most commonly used ones are magnetic switches, mercury switches, micro switches, etc.

Pressure switches are usually divided into two categories in the market, both of which have very useful or excellent characteristics:

1. In terms of installation structure, the pressure switch usually adopts a very simple and easy-to-operate installation component mode, so the installation is very simple;

2. The wiring connection mode of the insert can be modified and connected according to the user's needs.

3. The sensor is usually in a sealed stainless steel part, so it is not easy to be disturbed and injured by the outside.

4. The pressure switch can be designed according to the user's intolerable needs and then manufactured to the user in batches, which greatly meets the needs of the user.

Pressure switches are used in a wide range of applications, and are usually selected by many control systems as the best accessory for controlling switches, and are also highly valued in the home.