Electric temperature control valve for screw air compressor

Abstract

The utility model relates to an electric temperature control valve for a screw air compressor, which comprises a temperature control valve body, a motor mounting base is arranged on the temperature control valve body, a motor is arranged on the motor mounting base, one end of the motor is arranged in the motor mounting base and is connected with a valve rod, one end of the valve rod is arranged in the temperature control valve body and is connected with a main control valve core, and the main control valve core is connected with the motor. The main control valve element is connected with a first reset spring, a motor protecting cover is arranged on the outer side of the motor, the other end of the motor is arranged in the motor protecting cover and connected with an induction block, a second reset spring is arranged on the induction block, an original point position sensor is arranged outside the motor protecting cover, and the motor is connected and controlled through an external controller and a temperature sensor. The device is fast in response speed and high in control precision, and can realize point position control and accurately control the flow direction and temperature of lubricating oil; the temperature sensor collects temperature signals in real time, the control temperature fluctuation is small, the stability is high, the purpose of energy-saving control is achieved, and the service life is prolonged.

Description

Technical Field

[0001] The utility model relates to a temperature control valve, in particular to an electric temperature control valve for a screw type air compressor. Background Art

[0002] At present, 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 direction and temperature of the lubricating oil, controls the constant temperature of the lubricating oil in the air compressor, and thus maintains the stable operation of the air compressor.

[0003] Existing traditional physical temperature control valves primarily operate on the principle of thermal expansion and contraction. When the compressor's lubricating oil reaches the design temperature, the temperature control element's sensing bulb expands, reducing the oil flow rate. When the lubricating oil temperature falls below the design temperature, the sensing bulb contracts, increasing the oil flow rate. Due to this physical control mechanism, when the compressor is initially powered on, the physical temperature control element experiences a delay between sensing and actuation, leading to high-temperature alarms and shutdowns. Physical temperature control also results in a single controlled temperature, poor control accuracy, and the temperature control element's sensing bulb is susceptible to aging and failure. Summary of the Invention

[0004] The purpose of this utility model is to overcome the above shortcomings and provide a new electric temperature control valve for screw air compressor.

[0005] The purpose of the utility model is achieved through the following technical solutions: an electric temperature control valve for a screw air compressor, comprising a temperature control valve body, a motor mounting base is provided on the temperature control valve body, a motor is provided on the motor mounting base, one end of the motor is placed in the motor mounting base and is connected to a valve stem, one end of the valve stem is placed in the temperature control valve body and is connected to a main control valve core, the main control valve core is connected to a first return spring, a motor cover is provided on the outside of the motor, the other end of the motor is placed in the motor cover and is connected to a sensing block, a second return spring is provided on the sensing block, the motor is communicated with an external temperature sensor through a controller, the temperature sensor feeds back the collected oil temperature to the controller, the origin position sensor is placed outside the motor cover, and the origin position sensor controls the main control valve core to be in a fully open state.

[0006] A further improvement of the present invention is that a sealing member is provided between the temperature control valve body and the motor mounting base.

[0007] Compared with the prior art, the utility model has the following advantages:

[0008] 1. This utility model has fast response speed and high control accuracy, can realize point control, and accurately control the flow direction and temperature of lubricating oil;

[0009] 2. The temperature sensor collects temperature signals in real time, solving the problem of delayed temperature sensing and action of physical temperature control elements when the air compressor is first started. The air compressor will not give off high-temperature alarms or shut down.

[0010] 3. Control temperature fluctuations with small amount and high stability to achieve energy-saving control purpose;

[0011] 4. Solve the problem of physical temperature control components aging and needing regular replacement, thus extending their service life;

[0012] 5. When adjusting the temperature of the air compressor at the customer terminal, there is no need to dismantle the machine and replace the physical temperature control element. Instead, the customer only needs to set the parameters on the controller, which is flexible and convenient to operate and has strong versatility.

[0013] 6. Add the function of detecting the origin position of the electric temperature control valve to prevent the opening position from shifting. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural diagram of the utility model;

[0015] Numbers in the figure: 1-temperature control valve body, 2-motor mounting base, 3-motor cover, 4-sensor block, 5-second return spring, 6-origin position sensor, 7-motor, 8-seal, 9-valve stem, 10-main control valve core, 11-first return spring. DETAILED DESCRIPTION

[0016] In order to deepen the understanding of the present invention, the present invention will be further described in detail below with reference to embodiments and drawings. The embodiments are only used to explain the present invention and do not constitute a limitation on the scope of protection of the present invention.

[0017] The figure shows a specific embodiment of an electric temperature control valve for a screw air compressor of the present invention: it includes a temperature control valve body 1, a motor mounting base 2 is provided on the temperature control valve body 1, a sealing member 8 is provided between the temperature control valve body 1 and the motor mounting base 2, a motor 7 is provided on the motor mounting base 2, one end of the motor 7 is placed in the motor mounting base 2 and is connected to a valve stem 9, one end of the valve stem 9 is placed in the temperature control valve body 1 and is connected to a main control valve core 10, the motor 7 is used as an actuator to replace the original physical temperature control element. The physical change of the temperature sensing package drives the valve stem 9 to move, and the main control valve core 10 is connected to the first return spring 11, a motor cover 3 is provided on the outside of the motor 7, the other end of the motor 7 is placed in the motor cover 3 and is connected to the induction block 4, the induction block 4 is provided with a second return spring 5, the motor 7 is communicated with the external temperature sensor through the controller, the temperature sensor feeds back the collected oil temperature to the controller, the origin position sensor 6 is placed outside the motor cover 3, the origin position sensor 6 controls the main control valve core 10 to be in a fully open state, and automatically detects the origin position when powered on for the first time. It is easy to install and has high sensitivity. The temperature changes are monitored in real time and fed back to the controller.

[0018] When the system is powered on, the temperature control valve performs a return-to-origin action (assisted by the induction block 4, the second return spring 5, and the position sensor 6), reads the set temperature of the air compressor controller, and collects the real-time temperature detected by the temperature sensor. When the collected temperature is lower than or equal to the set temperature, the main control valve core 10 is in an open state under the action of the first return spring 11 and the motor 7 (the hot oil does not pass through the cooler). When the collected temperature exceeds the set temperature, the motor 7 pushes the valve stem 9 and overcomes the spring force of the first return spring 11, automatically adjusting the opening of the main control valve core 10 (part or all of the hot oil passes through the cooler) to maintain a constant oil temperature.

[0019] The utility model has a fast response speed and high control accuracy, can realize point control, and accurately control the flow direction and temperature of lubricating oil; the temperature sensor collects temperature signals in real time, controls temperature fluctuations to be small, has high stability, achieves the purpose of energy-saving control, and improves service life.

[0020] The applicant further states that while the above-described embodiments illustrate the implementation methods and device structures of the present invention, the present invention is not limited to the above-described embodiments, nor does it imply that the present invention must rely on the above-described methods and structures in order to be implemented. Persons skilled in the art should understand that any improvements to the present invention, equivalent replacements for the implementation methods selected for the present invention, additions to steps, and selections of specific methods, etc., fall within the scope of protection and disclosure of the present invention.

[0021] The present invention is not limited to the above-mentioned embodiments. All methods that use structures and methods similar to those of the present invention to achieve the purpose of the present invention are within the protection scope of the present invention.

Claims

1. An electric temperature control valve for a screw air compressor, comprising a temperature control valve body (1), characterized in that: A motor mounting base (2) is provided on the temperature control valve body (1), a motor (7) is provided on the motor mounting base (2), one end of the motor (7) is placed in the motor mounting base (2) and is connected to a valve stem (9), one end of the valve stem (9) is placed in the temperature control valve body (1) and is connected to a main control valve core (10), the main control valve core (10) is connected to a first return spring (11), a motor cover (3) is provided on the outside of the motor (7), the other end of the motor (7) is placed in the motor cover (3) and is connected to a sensor block (4), a second return spring (5) is provided on the sensor block (4), the motor (7) is communicated with an external temperature sensor through a controller, the temperature sensor feeds back the collected oil temperature to the controller, an origin position sensor (6) is placed outside the motor cover (3), and the origin position sensor (6) controls the main control valve core (10) to be in a fully open state.

2. The electric temperature control valve for a screw air compressor according to claim 1, characterized in that: A sealing member (8) is provided between the temperature control valve body (1) and the motor mounting base (2).

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