An electric flow control valve for an air compressor

Abstract

This utility model relates to an electric flow control valve for air compressors, including a valve body. An actuator motor is mounted on the valve body via a motor adapter plate. The drive shaft of the actuator motor is connected to a valve core, which is housed within the valve body. The valve core contains a V-shaped channel and a valve cover. The drive shaft passes through the valve cover, and a plane bearing is located between the valve core and the valve cover. An inlet is located at the bottom of the valve body, and an outlet is located on the side of the valve body. A minimum flow safety channel is also provided within the valve body. This utility model replaces traditional mechanical temperature control valves, fulfilling the prerequisite for electrified intelligent control. With the electric flow control valve, the fan frequency converter can be omitted, saving costs. After the air compressor stabilizes at low frequency, the oil injection flow is reduced through flow control, lowering the compressor load and achieving deep energy savings.

Description

Technical Field

[0001] This invention relates to solenoid valves for screw air compressors, and in particular to an electric flow control valve for air compressors. Background Technology

[0002] The temperature control valve is a dedicated control module for screw air compressors and an important component of the control system. It mainly controls the flow of hot lubricating oil to the cooler, thereby achieving constant lubricating oil temperature and maintaining stable operation of the air compressor.

[0003] Currently, temperature control valves use physical temperature control elements based on the principle of thermal expansion and contraction. However, these valves suffer from delayed temperature sensing, limited temperature control, poor accuracy, and are prone to aging and failure. Most electric flow control valves on the market are ball valves, offering only two states: fully open or fully closed. They cannot achieve linear regulation, lack automatic flow control, and have no minimum flow safety protection, resulting in poor applicability and making them unsuitable for automatic flow control in air compressors. Currently, most air compressors use variable frequency fans for cooling and lubrication, which is costly. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above-mentioned shortcomings and provide an electric flow control valve that is connected in parallel with the air compressor cooler to achieve air compressor temperature control, completely replacing the traditional temperature control valve; its application in screw air compressor oil injection flow control is safe and reliable, achieving energy saving and extending the service life of the air compressor; and the flow control valve can be applied to other water circuits, air circuits and other scenarios, with strong applicability.

[0005] The purpose of this utility model is achieved through the following technical solution: an electric flow control valve for an air compressor, including a valve body, an actuator motor is provided on the valve body via a motor adapter plate, the drive shaft of the actuator motor is connected to the valve core, the valve core is disposed in the valve body, a V-shaped channel is provided in the valve core, a valve cover is provided on the valve core, the drive shaft passes through the valve cover, a plane bearing is provided between the valve core and the valve cover, an inlet is provided at the bottom of the valve body, an outlet is provided on the side of the valve body, and a minimum flow safety channel is also provided in the valve body.

[0006] A further improvement of this utility model is that the actuator is connected to the induction block and the homing sensor.

[0007] A further improvement of this utility model is that a PTFE gasket is provided between the valve body and the valve core.

[0008] A further improvement of this utility model is that sealing rings are provided between the valve cover and the valve body, and between the valve cover and the drive shaft.

[0009] The advantages of this utility model compared with the prior art are as follows:

[0010] 1. Electric flow control valves are a prerequisite for replacing traditional mechanical temperature control valves and realizing electrified intelligent control.

[0011] 2. The valve core adopts a V-shaped channel, which improves the linearity of flow and achieves stable flow regulation.

[0012] 3. With the adoption of an electric flow control valve, the frequency converter for the fan can be omitted, saving costs.

[0013] 4. After the air compressor stabilizes, it operates at low frequency. By reducing the oil injection flow through flow control, the compressor load is reduced, achieving deep energy saving.

[0014] 5. The bottom-inlet, side-outlet structure reduces the force of fluid on the control valve core, reduces wear between the valve core and the valve body, and extends service life.

[0015] 6. The flow control valve core is equipped with a flat bearing, which further reduces valve core wear and extends service life.

[0016] 7. The electric flow valve is equipped with a minimum flow safety channel to prevent the air compressor from being damaged by high temperature due to lack of oil. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of this utility model;

[0018] Figure 2 This is a schematic diagram of the structure of this utility model;

[0019] Numbering in the diagram: 1-Valve body, 2-Motor adapter plate, 3-Actuator motor, 4-Drive shaft, 5-Valve core, 6-V-type channel, 7-Valve cover, 8-Side bearing, 9-Inlet, 10-Outlet, 11-Minimum flow safety channel, 12-Sensing block, 13-Return to origin sensor, 14-PTFE gasket, 15-Sealing ring. Detailed Implementation

[0020] To enhance understanding of this utility model, the present utility model will be further described in detail below with reference to the embodiments and accompanying drawings. These embodiments are only used to explain the present utility model and do not constitute a limitation on the scope of protection of the present utility model.

[0021] The figure illustrates a specific embodiment of the electric flow control valve for an air compressor according to this utility model: it includes a valve body 1, on which an actuator motor 3 is mounted via a motor adapter plate 2. The actuator motor 3 is connected to a sensing block 12 and a home return sensor 13. The sensing block 12 and the home return sensor 13 assist in completing the home return action of the electric flow control valve. The drive shaft 4 of the actuator motor 3 is connected to a valve core 5, which is located inside the valve body 1. The valve core 5 has a V-shaped channel 6, which improves the linearity of the flow and achieves stable flow regulation.

[0022] The valve core 5 is provided with a valve cover 7, and the drive shaft 4 passes through the valve cover 7. A plane bearing 8 is provided between the valve core 5 and the valve cover 7 to further reduce valve core wear and improve service life. The bottom of the valve body 1 is provided with an inlet 9 and the side of the valve body 1 is provided with an outlet 10. The bottom inlet and side outlet structure is adopted to reduce the force of fluid on the control valve core, reduce the wear of the valve core and the valve body, and extend the service life. The valve body 1 is also provided with a minimum flow safety channel 11 to prevent the air compressor from being damaged by high temperature due to lack of oil.

[0023] A PTFE gasket 14 is provided between the valve body 1 and the valve core 5. Sealing rings 15 are provided between the valve cover 7 and the valve body 1, and between the valve cover 7 and the drive shaft 4, which improves the sealing performance.

[0024] The working principle of this utility model:

[0025] The electric flow control valve receives signals from the controller and is driven by an actuator motor to rotate the valve core, thereby changing the flow channel area between the valve core and the valve body to regulate the flow of the medium. The larger the opening, the larger the flow area and the greater the flow rate, and vice versa, thus achieving the effect of regulating the flow rate.

[0026] First, the system is powered on. Then, the electric flow control valve performs a homing action (assisted by a sensing block and a homing sensor). Next, the air compressor controller detects the temperature from the pressure and temperature sensors and compares the collected temperature with the set temperature. When the collected temperature is lower than or equal to the set temperature, the flow control valve core is fully open. When the collected temperature is higher than the set temperature, the flow control valve core slowly opens under the action of the actuator motor and automatically adjusts the opening degree according to PID calculations to control the flow rate and maintain a constant temperature. When both pressure and temperature are stable, it automatically adjusts to the lowest optimal oil supply, allowing the air compressor unit to operate in an energy-saving manner.

[0027] This utility model replaces the traditional mechanical temperature control valve, fulfilling the prerequisite for electrified intelligent control; with the adoption of an electric flow control valve, the fan frequency converter can be omitted, saving costs; after the air compressor stabilizes, it operates at low frequency, and the oil injection flow is reduced through flow control, thus reducing the compressor load and achieving deep energy saving.

[0028] The applicant further declares that while the above embodiments illustrate the implementation method and apparatus structure of this utility model, this utility model is not limited to the above-described embodiments, meaning that this utility model must rely on the above methods and structures to be implemented. Those skilled in the art should understand that any improvements to this utility model, equivalent substitutions for the selected implementation methods, additions of steps, and selection of specific methods all fall within the protection and disclosure scope of this utility model.

[0029] This utility model is not limited to the above-described embodiments. All methods that use similar structures and methods to achieve the purpose of this utility model are within the protection scope of this utility model.

Claims

1. An electric flow control valve for an air compressor, comprising a valve body (1), an actuating motor (3) being provided on the valve body (1) through a motor adapter plate (2), characterized in that: The drive shaft (4) of the actuator (3) is connected to the valve core (5). The valve core (5) is located inside the valve body (1). The valve core (5) has a V-shaped channel (6) and a valve cover (7) on it. The drive shaft (4) passes through the valve cover (7). A plane bearing (8) is provided between the valve core (5) and the valve cover (7). The bottom of the valve body (1) has an inlet (9) and the side of the valve body (1) has an outlet (10). The valve body (1) also has a minimum flow safety channel (11).

2. The electric flow control valve for an air compressor according to claim 1, characterized by: The actuator (3) is connected to the sensing block (12) and the homing sensor (13).

3. The electric flow control valve for an air compressor according to claim 1, characterized by: A PTFE gasket (14) is provided between the valve body (1) and the valve core (5).

4. The electric flow control valve for an air compressor according to claim 1, characterized by: A sealing ring (15) is provided between the valve cover (7) and the valve body (1), and between the valve cover (7) and the drive shaft (4).

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