CN214660861U

CN214660861U - Air compressor

Info

Publication number: CN214660861U
Application number: CN202120336439.7U
Authority: CN
Inventors: 周晓凯
Original assignee: Seize Compressor Shanghai Co ltd
Current assignee: Seize Compressor Shanghai Co ltd
Priority date: 2021-02-05
Filing date: 2021-02-05
Publication date: 2021-11-09
Anticipated expiration: 2031-02-05

Abstract

The utility model relates to an air compression technical field. In order to solve the problem that compressed gas output by the existing air compressor cannot meet the quality requirements required by the food, electronic and medical industries, the utility model provides an air compressor, wherein, in a water-gas cylinder, a lining cylinder is installed and fixed in a cylinder body and forms an annular separation area, and the cylinder body is provided with an air inlet; the compression main machine is a water lubrication double-screw compression main machine, an air inlet valve is arranged at an air inlet, and an air outlet is communicated with an air inlet of the water gas cylinder; a water inlet of the water pump is communicated with a water outlet at the bottom of the water vapor cylinder, a water outlet of the water pump is communicated with a water inlet of the compression host, and a first one-way valve is arranged between the water pump and the compression host; the water inlet end of the water delivery branch pipe is provided with a second one-way valve and is communicated with the water outlet of the water gas cylinder, and the water outlet end of the water delivery branch pipe is communicated with the water delivery pipe between the second one-way valve and the water inlet of the compression main machine; the gas-water separator is communicated with the inner cavity of the lining cylinder. The compressed gas output by the air compressor is completely free of oil.

Description

Air compressor

Technical Field

The utility model relates to an air compression technical field especially relates to an air compressor machine that air compression used.

Background

At present, most air compressors in the market are oil injection screw air compressors, and the air compressors adopt lubricating oil to lubricate and cool a compression host machine of the air compressors, so that the output compressed gas is more or less provided with the lubricating oil. The compressed gas used in the food, electronic and medical industries cannot contain oil, so that the compressed gas output by the conventional air compressor cannot meet the quality requirements required by the food, electronic and medical industries.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem that compressed gas output by the existing air compressor cannot meet the quality requirements required by the food, electronic and medical industries, the utility model provides an air compressor, which comprises a water gas cylinder, a compression host, a water pump, a water delivery branch pipe and a gas-water separator, wherein the water gas cylinder comprises a cylinder body and a lining cylinder, the lining cylinder is fixedly installed in the cylinder body and is positioned at the upper part of the cylinder body, an annular separation area is arranged between the lining cylinder and the cylinder body, and an air inlet communicated with the annular separation area is arranged on the side wall of the cylinder body; the compression main machine is a water lubrication double-screw compression main machine, an air inlet valve is arranged at an air inlet of the compression main machine, and an air outlet of the compression main machine is communicated with an air inlet of the water gas cylinder through an air conveying pipeline; a water inlet of the water pump is communicated with a water outlet at the bottom of the water cylinder through a water delivery pipe, a water outlet of the water pump is communicated with a water inlet of the compression host through a water delivery pipe, and a first one-way valve is arranged between the water outlet of the water pump and the water inlet of the compression host; the water inlet end of the water delivery branch pipe is provided with a second one-way valve and is communicated with the water outlet at the bottom of the water vapor cylinder, and the water outlet end of the water delivery branch pipe is communicated with the water delivery pipe between the second one-way valve and the water inlet of the compression main machine; the gas-water separator is communicated with the inner cavity of the lining cylinder at the top of the gas cylinder through a gas transmission pipeline. After the air compressor is started, the water pump is started to establish water pressure, namely water in the water gas cylinder is pumped out and is delivered to the compression host through the first check valve to form water circulation; then, the water pump stops working after the water pressure is built, the compression main machine works, air enters the compression main machine through the air inlet valve to be compressed, the water-gas mixture discharged by the compression main machine enters the annular separation area in the water-gas cylinder through the air conveying pipeline and is subjected to rotary separation in the annular separation area, most of water in the water-gas mixture is separated and falls to the bottom of the water-gas cylinder, gas and a small part of water in the water-gas mixture enter the gas-water separator through the air conveying pipeline at the top of the water-gas cylinder to be subjected to secondary separation, the water subjected to secondary separation is accumulated at the bottom of the gas-water separator, and the gas subjected to secondary separation is discharged from the air outlet of the gas-water separator. The compression main machine of the air compressor adopts a water lubrication double-screw compression main machine, namely, water is used for replacing lubricating oil to realize the functions of lubrication, cooling, sealing, noise reduction and the like, the compressed gas output by the air compressor can be completely free of oil, no environmental pollution is caused, and the quality requirements required by the food, electronic and medical industries are met. In addition, adopt lubricated twin-screw compression host computer of water to conduct the utility model discloses the compression host computer of air compressor machine, compressed gas's temperature is low, and the water content is low, and compression efficiency is high, and the maintenance is with low costs, and need not to dispose gas cooler, reduces rear end auxiliary assembly, reduces the utility model discloses air compressor machine's manufacturing cost.

Preferably, a water cooler and a water filter are arranged between the first one-way valve and the water inlet of the compression main machine, and the water filter is positioned at the water outlet end of the water cooler. Therefore, when the compressor is used, the water cooler can be used for cooling the water output by the water pump, so that the problem that the cooling effect of a lubricant is influenced due to overhigh temperature of the water input into the compression main machine is avoided; the water that usable water filter exported the water cooler filters, avoids the aquatic to mix impurity and enters into the compression host computer in influence the compressed gas quality, causes the damage to the compression host computer even. Furthermore, the water inlet end of the water pump is provided with a Y-shaped filter. In this way, the water pumped from the water-air cylinder by the water pump can be preliminarily filtered by the Y-shaped filter.

Preferably, the air compressor comprises a frequency converter, and the frequency converter is electrically connected with the motor of the water pump and the motor of the compression host. Like this, when using, utilize opening of converter control water pump and compression host's motor to stop, utilize opening of converter control water pump and compression host promptly to stop, not only open and stop steadily, the noise is low, reduces power consumption, can also realize the intelligent control of water pump and compression host, and control is simple and convenient.

Preferably, a floating ball liquid level switch electrically connected with the frequency converter is arranged on the water gas cylinder, a water discharge port of the water gas cylinder is connected with a water discharge device, the water discharge device comprises a water discharge electromagnetic valve, a water discharge ball valve and a blocking ball valve, the water discharge electromagnetic valve is positioned between the water discharge port of the water gas cylinder and the blocking ball valve and is electrically connected with the frequency converter, and the water discharge ball valve is positioned between the water discharge port of the water gas cylinder and the blocking ball valve and is connected with the water discharge ball valve in parallel. Therefore, when the floating ball liquid level switch senses that the water level in the water gas cylinder is positioned at the upper limit of the floating ball liquid level switch, the floating ball liquid level switch sends a water full signal to the frequency converter, and the frequency converter sends a water discharging instruction to the water discharging electromagnetic valve after receiving the water full signal, so that the water discharging electromagnetic valve is opened, and the water in the water gas cylinder is discharged through the water discharging electromagnetic valve and the blocking ball valve; when the drainage speed of the drainage electromagnetic valve is too slow or not reacted, the drainage ball valve can be opened to accelerate the drainage speed or the water in the water gas cylinder is discharged through the drainage ball valve and the blocking ball valve.

Preferably, a pressure maintaining valve is arranged on a gas transmission pipeline between the gas-water separator and the gas cylinder, and a pressure sensor electrically connected with the frequency converter is arranged on the pressure maintaining valve. Like this, the aqueous vapor mixture of compression host output carries out preliminary gas-water separation back through the aqueous vapor section of thick bamboo, and usable pressure sensor real-time detection compressed gas's pressure and utilize the pressure to maintain the pressure that the valve maintained compressed gas, avoid compressed gas to reduce through preliminary gas-water separation back pressure, influence follow-up use.

Preferably, the air compressor machine includes moisturizing mechanism, and this moisturizing mechanism is including supplying water ball valve, moisturizing solenoid valve and moisturizing ball valve, the moisturizing solenoid valve is located supply water ball valve with between the admission valve and with the converter electricity is connected, the moisturizing ball valve is located supply water ball valve with between the admission valve and with moisturizing solenoid valve parallel connection. Therefore, in the using process, when the floating ball liquid level switch senses that the water level in the water gas cylinder is positioned at the lower limit of the floating ball liquid level switch, the floating ball liquid level switch sends a water shortage signal to the frequency converter, the frequency converter sends a water replenishing instruction to the water replenishing electromagnetic valve after receiving the water shortage signal, the water replenishing electromagnetic valve is opened, and therefore water supplied by the water supply ball valve enters the air inlet valve through the water replenishing electromagnetic valve and further enters the water gas cylinder when the water-gas mixture is subjected to preliminary gas-water separation in the water gas cylinder, and water replenishment is completed; when the water replenishing speed of the water replenishing solenoid valve is too slow or the water replenishing solenoid valve does not react, the water replenishing ball valve can be opened to accelerate the water replenishing speed or make water supplied by the water supplying ball valve enter the air inlet valve through the water replenishing ball valve to complete water replenishing.

Preferably, the air compressor machine includes the mechanism of adding water, should add water the mechanism and include the ball valve of adding water, should add water the water inlet of ball valve pass through the filler pipe with the delivery port of ball valve is connected, the delivery port of ball valve of adding water pass through the filler pipe in the top of water gas section of thick bamboo with water gas section of thick bamboo intercommunication. Like this, before using, can directly open the ball valve of adding water, make the water that the ball valve of supplying water supplied directly enter into the aqueous vapor section of thick bamboo through the filler pipe with the ball valve of adding water, add water convenient and fast.

Preferably, the bottom of the gas-water separator is provided with a water return pipe communicated with the air inlet valve. Therefore, when the gas-water separator performs secondary separation on the compressed gas output by the water-gas cylinder, the separated water is accumulated at the bottom of the gas-water separator and enters the lower end of the air inlet valve through the water return pipe, and then enters the compression main machine, so that the recovery of residual water can be realized, and the waste is avoided.

Preferably, the air compressor comprises a loading electromagnetic valve and a pressure-limiting relief valve, the loading electromagnetic valve is connected with the bottom end of the air inlet valve and the water gas cylinder through a loading control pipe, the pressure-limiting relief valve is connected with the upper end of the air inlet valve and the water gas cylinder through a pressure-relieving control pipe, when the loading electromagnetic valve is electrified, the loading electromagnetic valve is opened, and gas in the water gas cylinder enters the air cylinder of the air inlet valve through the loading electromagnetic valve; when the loading electromagnetic valve is de-energized, the pressure-limiting relief valve is opened, and the gas in the gas cylinder is discharged to the upper end of the gas inlet valve through the pressure-limiting relief valve. Therefore, when the air compressor is used, the gas in the water gas cylinder can be loaded into the cylinder of the air inlet valve by the aid of the loading electromagnetic valve, the valve plate of the air inlet valve is further opened, the gas can be loaded into the compression main machine, and the gas loading is convenient and rapid; the gas in the water gas cylinder can be discharged to the upper end of the gas inlet valve by utilizing the pressure-limiting discharge valve, so that the gas enters the atmosphere, the unloading of the gas in the water gas cylinder is completed, and the gas-discharging device is convenient and fast.

Drawings

Fig. 1 is the structure schematic diagram of the air compressor of the utility model.

Detailed Description

The air compressor of the present invention will be described in detail with reference to fig. 1.

As shown in figure 1, the air compressor of the utility model comprises a water gas cylinder 1, a compression main machine 2, a water pump 3, a water delivery branch pipe 4, a gas-water separator 5 and a frequency converter 6 electrically connected with the motor of the compression main machine 2 and the motor of the water pump 3. The water gas cylinder 1 comprises a cylinder body 11 and a lining cylinder 12, the lining cylinder 12 is fixedly installed in the cylinder body 11 and located on the upper portion of the cylinder body 11, an annular separation area 13 is arranged between the lining cylinder 12 and the cylinder body 11, and a gas inlet communicated with the annular separation area 13 is formed in the side wall of the cylinder body 11. Preferably, a pressure gauge 14 and a safety valve 15 are arranged on the side wall of the cylinder body 11 of the water gas cylinder 1, wherein the pressure gauge 14 monitors the air pressure in the water gas cylinder 1 in real time to avoid the over-high air pressure in the water gas cylinder 1; the safety valve 15 exhausts and releases pressure when the air pressure in the water gas cylinder 1 is too high, so that the phenomenon that the air pressure in the water gas cylinder 1 is too high is avoided. Preferably, the water gas cylinder 1 is provided with a float level switch 16 electrically connected with the frequency converter 6, the water discharge port of the water gas cylinder 1 is connected with a water discharge device, the water discharge device comprises a water discharge electromagnetic valve 71, a water discharge ball valve 72 and a blocking ball valve 73, the water discharge electromagnetic valve 71 is positioned between the water discharge port of the water gas cylinder 1 and the blocking ball valve 73 and is electrically connected with the frequency converter 6, and the water discharge ball valve 72 is positioned between the water discharge port of the water gas cylinder 1 and the blocking ball valve 73 and is connected with the water discharge ball valve 72 in parallel. Thus, when the float level switch 16 senses that the water level in the water gas cylinder 1 is at the upper limit of the float level switch 16, the float level switch 16 sends a water full signal to the frequency converter 6, and the frequency converter 6 sends a water discharge instruction to the water discharge electromagnetic valve 71 after receiving the water full signal, so that the water discharge electromagnetic valve 71 is opened, and the water in the water gas cylinder 1 is discharged through the water discharge electromagnetic valve 71 and the blocking ball valve 73; when the water discharge speed of the water discharge solenoid valve 71 is too slow or non-reactive, the water discharge ball valve 72 may be opened to increase the water discharge speed or the water in the water gas cylinder 1 may be discharged through the water discharge ball valve 72 and the blocking ball valve 73.

Compressed host 2 is lubricated double screw compressed host of water, when using, utilizes opening of the motor of 6 control compressed host 2 of converter to open, utilizes opening of 6 control compressed host 2 of converter promptly to open and stop steadily, and the noise is low, and is power consumptive few, and can realize intelligent control, and control is simple and convenient. An air inlet valve 81 is arranged at the air inlet of the compression main machine 2, and the air outlet of the compression main machine 2 is communicated with the air inlet of the water gas cylinder 1 through an air pipeline 17. Preferably, the air intake department of admission valve 81 is provided with air cleaner 82 to air to entering into admission valve 81 filters, and the impurity of avoiding carrying in the air enters into compressor machine 2 through admission valve 81, influences the compressed gas quality, causes the damage to admission valve 81 and compressor machine 2 even, influences the utility model discloses the use of air compressor machine.

The water inlet of the water pump 3 is communicated with the water outlet at the bottom of the water vapor cylinder 1 through a water delivery pipe 31, the water outlet of the water pump 3 is communicated with the water inlet of the compression host 2 through a water delivery pipe 32, and a first one-way valve 33 is arranged on the water delivery pipe 32 between the water outlet of the water pump 3 and the water inlet of the compression host 2. When using, utilize opening of converter 6 control water pump 3's motor to stop, utilize opening of converter 6 control water pump 3 promptly to stop steadily, open and stop, the noise is low, and is power consumptive few, and can realize intelligent control, and control is simple and convenient. Preferably, a water cooler 34 and a water filter 35 are arranged between the first check valve 33 and the water inlet of the compression main machine 2, and the water filter 35 is positioned at the water outlet end of the water cooler 34. Therefore, when in use, the water cooler 34 can be used for cooling the water output by the water pump 3, so as to avoid the problem that the temperature of the water input into the compression main machine 2 is too high to influence the cooling effect of the lubricant; the water that usable water filter 35 exported water cooler 34 filters, avoids the aquatic to mix impurity and enters into in the compression owner 2 and influence the compressed gas quality, causes the damage to the compression owner 2 even. Preferably, the water inlet end of the water pump 3 is provided with a Y-filter 36. In this way, the water pumped from the water cylinder 1 by the water pump 3 can be preliminarily filtered by the Y-filter 36 to remove impurities in the water entering the compression main unit 2 and the water cooler 34.

The water inlet end of the water delivery branch pipe 4 is provided with a second one-way valve 41 and is communicated with the water outlet at the bottom of the water gas cylinder 1, and the water outlet end of the water delivery branch pipe 4 is communicated with the water delivery pipe 32 between the second one-way valve 41 and the water inlet of the compression main machine 3.

The gas-water separator 5 is communicated with the inner cavity of the lining cylinder 12 at the top of the water-gas cylinder 1 through a gas transmission pipeline 18. Preferably, a pressure maintaining valve 91 is provided on the gas transmission pipeline 18 between the gas-water separator 5 and the water gas cylinder 1, and a pressure sensor 92 electrically connected with the frequency converter 7 is provided on the pressure maintaining valve 91. Therefore, after the water-gas mixture output by the compression main machine 2 is subjected to preliminary gas-water separation by the water gas cylinder 1, the pressure of the compressed gas output by the water gas cylinder 1 can be detected in real time by the pressure sensor 92, and the pressure of the compressed gas is maintained by the pressure maintaining valve 91, so that the pressure reduction of the compressed gas after the preliminary gas-water separation is avoided, and the subsequent use is prevented from being influenced. Preferably, the bottom of the gas-water separator 5 is provided with a return pipe 51 communicating with the intake valve 81. Thus, when the gas-water separator 5 performs secondary separation on the compressed gas output by the water-gas cylinder 1, the separated water is accumulated at the bottom of the gas-water separator 5 and enters the lower end of the air inlet valve 81 through the water return pipe 51, and then enters the compression main machine 2, so that residual water recovery can be realized, and waste is avoided.

The air compressor machine still includes moisturizing mechanism and adds water mechanism. The water supplementing mechanism comprises a water supply ball valve 101, a water supplementing electromagnetic valve 102 and a water supplementing ball valve 103, the water supplementing electromagnetic valve 102 is located between the water supply ball valve 101 and the air inlet valve 81 and is electrically connected with the frequency converter 6, and the water supplementing ball valve 103 is located between the water supply ball valve 101 and the air inlet valve 81 and is connected with the water supplementing electromagnetic valve 102 in parallel. Thus, in the use process, when the floating ball liquid level switch 16 of the water gas cylinder 1 senses that the water level in the water gas cylinder 1 is positioned at the lower limit position of the floating ball liquid level switch 16, the floating ball liquid level switch 16 sends a water shortage signal to the frequency converter 6, the frequency converter 6 sends a water replenishing instruction to the water replenishing electromagnetic valve 102 after receiving the water shortage signal, the water replenishing electromagnetic valve 102 is opened, so that water supplied by the water supply ball valve 101 enters the air inlet valve 81 through the water replenishing electromagnetic valve 102, and then enters the water gas cylinder 1 when the water-gas mixture is subjected to preliminary gas-water separation in the water gas cylinder 1, and water replenishment is completed; when the water replenishing speed of the water replenishing solenoid valve 102 is too slow or when the water replenishing speed is not reacted, the water replenishing ball valve 103 can be opened to accelerate the water replenishing speed or make the water supplied by the water supplying ball valve 101 enter the air inlet valve 81 through the water replenishing ball valve 103 to complete the water replenishing. The water adding mechanism comprises a water adding ball valve 111, a water inlet of the water adding ball valve 111 is connected with a water outlet of the water supply ball valve 101 through a water adding pipe, and a water outlet of the water adding ball valve 111 is communicated with the water gas cylinder 1 at the top of the water gas cylinder 1 through the water adding pipe. Therefore, before the water supply device is used, the water adding ball valve 111 can be directly opened, so that water supplied by the water supply ball valve 111 directly enters the water gas cylinder 1 through the water adding pipe and the water adding ball valve 111, and the water adding is convenient and quick.

In addition, the air compressor comprises a loading electromagnetic valve 121 and a pressure-limiting relief valve 122, the loading electromagnetic valve 121 is connected with the bottom end of the air inlet valve 81 and the water gas cylinder 1 through a loading control pipe, the pressure-limiting relief valve 122 is connected with the upper end of the air inlet valve 81 and the water gas cylinder 1 through a pressure-relieving control pipe, when the loading electromagnetic valve 121 is electrified, the loading electromagnetic valve 121 is opened, and gas in the water gas cylinder 1 enters the air cylinder of the air inlet valve 81 through the loading electromagnetic valve 121; when the charging solenoid valve 121 is de-energized, the pressure limiting relief valve 122 is opened, and the gas in the water gas cylinder 1 is discharged to the upper end of the gas inlet valve 81 through the pressure limiting relief valve 122. Thus, when the air compressor of the utility model is used, the gas in the water gas cylinder 1 can be loaded into the cylinder of the air inlet valve 81 by the loading electromagnetic valve 121, and then the valve plate of the air inlet valve 81 is opened to load the gas into the compression main machine 2, so that the gas loading is convenient and fast; the pressure-limiting relief valve 122 can be used for discharging the gas in the water gas cylinder 1 to the upper end of the gas inlet valve 81, so that the gas enters the atmosphere, the unloading of the gas in the water gas cylinder 1 is completed, and the operation is convenient and fast. Preferably, a temperature sensor 123 electrically connected with the frequency converter 6 is arranged on the air pipeline 17 at the air outlet of the compression main machine 2, the axial flow fan 341 on the water cooler 34 is electrically connected with the frequency converter 6, when the loading electromagnetic valve 121 is powered on, the temperature sensor 123 monitors the temperature of the water-air mixture in the air pipeline 17 in real time and feeds the temperature back to the frequency converter 6 in real time, when the temperature of the water-air mixture output by the compression main machine 2 exceeds a set value, the temperature sensor 123 sends an over-temperature signal to the frequency converter 6, and the frequency converter 6 sends a cooling instruction to the axial flow fan 341 to enable the axial flow fan 341 to operate until the temperature of the water-air mixture reaches the set value.

After the air compressor is started, the water pump is started to establish water pressure, namely water in the water gas cylinder is pumped out and is delivered to the compression host through the first check valve to form water circulation; then, the water pump stops working after the water pressure is built, the compression main machine works, air enters the compression main machine through the air inlet valve to be compressed, the water-gas mixture discharged by the compression main machine enters the annular separation area in the water-gas cylinder through the air conveying pipeline and is subjected to rotary separation in the annular separation area, most of water in the water-gas mixture is separated and falls to the bottom of the water-gas cylinder, gas and a small part of water in the water-gas mixture enter the gas-water separator through the air conveying pipeline at the top of the water-gas cylinder to be subjected to secondary separation, the water subjected to secondary separation is accumulated at the bottom of the gas-water separator, and the gas subjected to secondary separation is discharged from the air outlet of the gas-water separator. The compression main machine of the air compressor adopts a water lubrication double-screw compression main machine, namely, water is used for replacing lubricating oil to realize the functions of lubrication, cooling, sealing, noise reduction and the like, the compressed gas output by the air compressor can be completely free of oil, no environmental pollution is caused, and the quality requirements required by the food, electronic and medical industries are met. In addition, adopt lubricated twin-screw compression host computer of water to conduct the utility model discloses the compression host computer of air compressor machine, compressed gas's temperature is low, and the water content is low, and compression efficiency is high, and the maintenance is with low costs, and need not to dispose gas cooler, reduces rear end auxiliary assembly, reduces the utility model discloses air compressor machine's manufacturing cost.

Claims

1. The air compressor is characterized by comprising a water-gas cylinder, a compression main machine, a water pump, a water delivery branch pipe and a gas-water separator, wherein the water-gas cylinder comprises a cylinder body and a lining cylinder, the lining cylinder is fixedly arranged in the cylinder body and positioned at the upper part of the cylinder body, an annular separation area is arranged between the lining cylinder and the cylinder body, and a gas inlet communicated with the annular separation area is arranged on the side wall of the cylinder body; the compression main machine is a water lubrication double-screw compression main machine, an air inlet valve is arranged at an air inlet of the compression main machine, and an air outlet of the compression main machine is communicated with an air inlet of the water gas cylinder through an air conveying pipeline; a water inlet of the water pump is communicated with a water outlet at the bottom of the water cylinder through a water delivery pipe, a water outlet of the water pump is communicated with a water inlet of the compression host through a water delivery pipe, and a first one-way valve is arranged between the water outlet of the water pump and the water inlet of the compression host; the water inlet end of the water delivery branch pipe is provided with a second one-way valve and is communicated with the water outlet at the bottom of the water vapor cylinder, and the water outlet end of the water delivery branch pipe is communicated with the water delivery pipe between the second one-way valve and the water inlet of the compression main machine; the gas-water separator is communicated with the inner cavity of the lining cylinder at the top of the gas cylinder through a gas transmission pipeline.

2. The air compressor as claimed in claim 1, wherein a water cooler and a water filter are disposed between the first check valve and the water inlet of the compression main unit, and the water filter is disposed at a water outlet end of the water cooler.

3. The air compressor as claimed in claim 2, wherein the water inlet end of the water pump is provided with a Y-filter.

4. The air compressor as claimed in any one of claims 1 to 3, wherein the air compressor includes a frequency converter electrically connected to the motor of the water pump and the motor of the compressor main unit.

5. The air compressor as claimed in claim 4, wherein a float level switch is provided on the canister and electrically connected to the frequency converter, a drain port of the canister is connected to a drain device comprising a drain solenoid valve, a drain ball valve and a block ball valve, the drain solenoid valve is located between the drain port of the canister and the block ball valve and electrically connected to the frequency converter, and the drain ball valve is located between the drain port of the canister and the block ball valve and electrically connected to the drain ball valve in parallel.

6. The air compressor as claimed in claim 4, wherein a pressure maintaining valve is provided on an air pipe between the air-water separator and the water cylinder, and a pressure sensor electrically connected to the frequency converter is provided on the pressure maintaining valve.

7. The air compressor of claim 4, wherein the air compressor comprises a water supplementing mechanism, the water supplementing mechanism comprises a water supply ball valve, a water supplementing electromagnetic valve and a water supplementing ball valve, the water supplementing electromagnetic valve is located between the water supply ball valve and the air inlet valve and electrically connected with the frequency converter, and the water supplementing ball valve is located between the water supply ball valve and the air inlet valve and connected with the water supplementing electromagnetic valve in parallel.

8. The air compressor as claimed in claim 7, wherein the air compressor includes a water adding mechanism including a water adding ball valve, a water inlet of the water adding ball valve is connected to a water outlet of the water supply ball valve through a water adding pipe, and a water outlet of the water adding ball valve is communicated with the water cylinder at a top of the water cylinder through a water adding pipe.

9. The air compressor as claimed in claim 4, wherein a return pipe communicated with the air intake valve is provided at a bottom of the air-water separator.

10. The air compressor as claimed in claim 1, wherein the air compressor includes a loading solenoid valve and a pressure limiting relief valve, the loading solenoid valve is connected to the bottom end of the air inlet valve and the water gas cylinder through a loading control pipe, the pressure limiting relief valve is connected to the upper end of the air inlet valve and the water gas cylinder through a pressure relief control pipe, when the loading solenoid valve is powered, the loading solenoid valve is opened, and the gas in the water gas cylinder enters the air cylinder of the air inlet valve through the loading solenoid valve; when the loading electromagnetic valve is de-energized, the pressure-limiting relief valve is opened, and the gas in the gas cylinder is discharged to the upper end of the gas inlet valve through the pressure-limiting relief valve.