Self-regulating electrically heated steam generator

Abstract

This utility model relates to a self-controlled electric heating steam generator, including a housing and an electric heater, a controller, and a variable frequency pump installed inside the housing. The electric heater includes a casing, an electric heating element, and a solenoid valve. The controller includes a main controller and a heating controller. A temperature sensor, a pressure sensor, and a flow sensor are installed on the outlet pipe. At least two electric heaters are installed in parallel inside the housing. The operating state of each electric heater is controlled by the output signals of the temperature sensor, pressure sensor, and flow sensor through the output commands of the main controller and the heating controller. The number of electric heaters can be automatically activated according to the steam pressure or flow requirements under the operating conditions, thereby automatically adjusting the pressure or flow of the output steam. The pressure and flow adjustment range is large.

Description

Technical Field

[0001] This utility model relates to a heating device, and more particularly to a self-controlled electric heating steam generator. Background Technology

[0002] Heating equipment is a crucial component in the production processes of industries such as textiles, clothing, printing and dyeing, papermaking, and pharmaceuticals, providing the steam or hot air required for product manufacturing. Electric heating equipment is a common source of steam or hot air. Its structure typically includes an electric heater, control valve, inlet pipe, outlet pipe, and pump. Cold water or cold air is pumped through the inlet pipe into the electric heater, where it is heated to produce steam or hot air, which is then output to the user through the outlet pipe. However, the flow rate and pressure adjustment range of this type of electric heater are relatively small, failing to meet the wide range of steam flow and pressure requirements in industrial production processes. Utility Model Content

[0003] This utility model addresses the problems existing in the prior art by providing a self-controlled electric heating steam generator that adopts modular combination and can automatically adjust the output steam pressure or flow rate according to the operating conditions, with a wide range of steam pressure or flow rate adjustment.

[0004] The technical solution for realizing this utility model is as follows:

[0005] A self-controlled electric heating steam generator includes a housing and an electric heater, a controller, and a variable frequency pump installed within the housing. The housing has an inlet connector and an outlet connector. The electric heater includes a casing, an electric heating element, and a solenoid valve. The electric heating element is installed inside the casing. The casing inlet is connected to the variable frequency pump outlet via the solenoid valve and an inlet pipe. The variable frequency pump inlet is connected to the inlet connector. The casing outlet is connected to the outlet connector via an outlet pipe. The controller includes a main controller and a heating controller. A temperature sensor, a pressure sensor, and a flow sensor are installed on the outlet pipe. The generator is characterized by having at least two electric heaters connected in parallel between the inlet and outlet pipes within the housing. Each electric heater has a corresponding heating controller. The switching signals of the electric heating element and the solenoid valve are controlled by the output signals of the temperature sensor, pressure sensor, and flow sensor through output commands from the main controller and the heating controller.

[0006] In the above technical solution, the electric heating device uses a spiral electric heating tube installed in a spiral flow channel inside the inner cavity of the box. The inlet of the spiral flow channel is connected to the inlet of the box, and the outlet of the spiral flow channel is connected to the outlet of the box.

[0007] In the above technical solution, a check valve and a shut-off valve are installed between the box inlet and the solenoid valve, with the flow direction of the check valve facing the box inlet.

[0008] The advantages of this utility model compared with the prior art are: at least two electric heaters are installed in parallel inside the housing, and the working state of each electric heater is controlled by the output signals of the temperature sensor, pressure sensor and flow sensor through the output commands of the main controller and the heating controller. The number of electric heaters can be automatically activated according to the steam pressure or flow requirements of the operating conditions, so as to realize the automatic adjustment of the output steam pressure or flow, and the adjustment range is large. Attached Figure Description

[0009] Figure 1 This is a schematic diagram of the structure of this utility model.

[0010] In the diagram: 1. Housing, 2. Heating controller, 3. Inlet, 4. Fan, 5. Emergency switch, 6. Operation control panel, 7. Main controller, 8. Heat dissipation window, 9. Ventilation vent, 10. Check valve, 11. Outlet, 12. Outlet connector, 13. Flow sensor, 14. Pressure sensor, 15. Temperature sensor, 16. Variable frequency pump, 17. Outlet pipe, 18. Inlet pipe, 19. Housing, 20. Solenoid valve. Detailed Implementation

[0011] like Figure 1The self-controlled electric heating steam generator shown includes a housing 1 and an electric heater, controller, and frequency converter pump 16 installed inside the housing 1. The housing 1 is provided with an inlet connector and an outlet connector 12. The electric heater includes a housing 19, an electric heating element, and a solenoid valve 20. The electric heating element is installed inside the housing 19. The housing inlet 3 is connected to the outlet of the frequency converter pump 16 through the solenoid valve 20 and an inlet pipe 18. The inlet of the frequency converter pump 16 is connected to the inlet connector. The housing outlet 11 is connected to the outlet connector 12 through an outlet pipe 17. The inlet connector is connected to a water supply pipe. The frequency converter pump 16 inputs water from the water supply pipe into the housing 19 through the inlet pipe 18, the solenoid valve 20, and the housing inlet 3. The water is then used to generate steam, which is delivered to the production environment from the housing outlet 11, the outlet pipe 17, and the outlet connector 12. The controller includes a main controller 7 and a heating controller 2. The main controller 7 receives setting parameters from the operation control panel 6. These setting parameters are configured according to the requirements of the operating conditions. The system sets the pressure, flow rate, and temperature values, and simultaneously receives the actual pressure, flow rate, and temperature values ​​within the outlet pipe 17. Through microcomputer calculation, it controls the heating controller 2, which in turn controls the electric heater to start or stop operation. Temperature sensors 15, 14, and 13 are installed on the outlet pipe 17 to monitor the steam temperature, pressure, and flow rate within the outlet pipe 17. The system is characterized by having at least two electric heaters, connected in parallel between the inlet pipe 18 and the outlet pipe 17 within the casing 1. Each electric heater has a corresponding heating controller 2. The switching signals for the electric heating element and the solenoid valve 20 are provided by the output signal of the corresponding heating controller 2. Based on the set parameter commands and the actual parameters from the temperature sensors 15, 14, and 13, the main controller 7 outputs commands to control the heating controller 2, determining the number of electric heaters in operation. The system has a wide range of adjustable output steam pressure and flow rate.

[0012] The electric heating device uses a spiral heating tube installed inside a spiral flow channel within the cavity of the housing 19. The inlet of the spiral flow channel is connected to the housing inlet 3, and the outlet of the spiral flow channel is connected to the housing outlet 11. Water enters from the housing inlet 3, is heated by the heating tube inside the spiral flow channel, and steam is generated and output from the housing outlet 11, resulting in high heating efficiency.

[0013] A check valve 10 and a shut-off valve are installed between the housing inlet 3 and the solenoid valve 20. The flow direction of the check valve 10 is towards the housing inlet 3 to prevent steam backflow. The shut-off valve is used to cut off the inlet channel medium in an emergency during maintenance.

[0014] A fan 4, a vent 9, and a heat dissipation window 8 are provided on the housing 1 to improve the heat dissipation performance of the equipment. The operation control panel 6 is installed on the housing 1 via a control panel. An emergency switch 5 is installed on the control panel to allow manual emergency switching of the equipment.

Claims

1. A self-control electric heating steam generator, comprising a shell (1) and an electric heater, a controller and a variable frequency pump (16) installed in the shell (1), the shell (1) is provided with an inlet joint and an outlet joint (12), the electric heater comprises a box (19) and an electric heating device, the electric heating device is installed in the inner cavity of the box (19), the box inlet (3) is communicated with the outlet of the variable frequency pump (16) through the electromagnetic valve (20) and the inlet pipeline (18), the inlet of the variable frequency pump (16) is communicated with the inlet joint, the box outlet (11) is communicated with the outlet joint (12) through the outlet pipeline (17), the controller comprises a main controller (7) and a heating controller (2), a temperature sensor (15), a pressure sensor (14) and a flow sensor (13) are installed on the outlet pipeline (17); characterized in that: There are at least two electric heaters, which are installed in parallel between the inlet pipe (18) and the outlet pipe (17) inside the housing (1). Each electric heater is equipped with a corresponding heating controller (2). The switching signals of the electric heating device and the solenoid valve (20) of the electric heater are provided by the output signal of the corresponding heating controller (2). ​ 2. The self-controlled electric heating steam generator according to claim 1, characterized in that: The electric heating device uses a spiral heating tube installed in the spiral flow channel inside the cavity of the box (19). The inlet of the spiral flow channel is connected to the inlet (3) of the box, and the outlet of the spiral flow channel is connected to the outlet (11) of the box.

3. The self-controlled electric heating steam generator according to claim 1 or 2, characterized in that: A check valve (10) and a shut-off valve are installed between the box inlet (3) and the solenoid valve (20), with the flow direction of the check valve (10) facing the box inlet (3).

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