Split electromagnetic boiler and heating method thereof

Abstract

The present invention discloses a split electromagnetic boiler and a heating method thereof. The electromagnetic boiler comprises: a control cabinet and a plurality of split cabinets; a control panel and a circulating pump are arranged in the control cabinet, and a touch screen is arranged on the control cabinet; a plurality of electromagnetic heating cylinders are connected in series through pipelines inside the split cabinets; a temperature sensor is installed at the inlet of the pipeline inside the split cabinet, and a temperature sensor is installed at the outlet of the pipeline; the front end of the circulating pump is connected to the liquid port, and the rear end of the circulating pump is connected to the inlet of the pipeline inside one of the split cabinets; the boiler heats the heating liquid in multiple stages through the multi-stage series-connected split cabinets, and its temperature rise speed is fast, the outlet temperature of the heating liquid is high, and the electromagnetic boiler has high operating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of electromagnetic heating, and in particular to a split-type electromagnetic boiler and a heating method thereof. Background Art

[0002] In the existing electromagnetic boiler, the number of internal heating tubes is limited, and most of them are placed vertically and connected in parallel. When the heating tubes of the above structure heat the internal circulating heating liquid, the temperature rise of the heating liquid in each cycle is limited, and its outlet temperature does not meet the ideal requirements. In addition, the top of the vertical heating tube is prone to gas accumulation, and the heat energy cannot effectively cover the heating liquid, resulting in high energy consumption, slow temperature rise and other problems. Summary of the Invention

[0003] In response to the problems in the prior art, the present invention provides a split electromagnetic boiler and a heating method thereof. The boiler heats the heating liquid in multiple stages through multi-stage series-connected split cabinets. The temperature rise rate is fast, the outlet temperature of the heating liquid is high, and the electromagnetic boiler has high operating efficiency.

[0004] To achieve the purpose of the present invention, the present invention adopts the following technical solutions:

[0005] A split electromagnetic boiler comprises: a control cabinet and multiple split cabinets; the control cabinet is provided with a control panel and a circulating pump 1, and the control cabinet is provided with a touch screen; multiple electromagnetic heating tubes are connected in series through pipelines inside the split cabinets; a temperature sensor 1 is installed at the inlet of the internal pipeline of the split cabinet, and a temperature sensor 2 is installed at the outlet of the pipeline; the front end of the circulating pump 1 is connected to the liquid port, and the rear end of the circulating pump 1 is connected to the inlet of the internal pipeline of one of the split cabinets; the multiple split cabinets are connected in series, and the outlet of the internal pipeline of the previous split cabinet is connected to the inlet of the internal pipeline of the next split cabinet by a pipeline; each electromagnetic heating tube, temperature sensor 1, and temperature sensor 2 in the split cabinet are electrically connected to the control panel; the touch screen and circulating pump 1 are electrically connected to the control panel.

[0006] Preferably, the control cabinet is further provided with a second circulation pump, which is connected in parallel with the first circulation pump; and the second circulation pump is electrically connected to the control panel.

[0007] Preferably, the control panel is provided with a main PLC module, multiple slave PLC modules, a switching power supply 1, a switching power supply 2, and multiple frequency converters; the output end of the main PLC module is connected to the input ends of multiple slave PLC modules through multiple intermediate relays KA respectively; the output end of the main PLC module is connected to two AC contactors KM through two intermediate relays KA; the contacts of the two AC contactors KM are respectively connected to the power supply ends of circulating pump 2 and circulating pump 1; each slave PLC module is connected to multiple frequency converters; the output of each frequency converter is electrically connected to the electromagnetic heating tube; the temperature sensor 1 and the temperature sensor 2 installed in each split cabinet are connected to the main PLC module and multiple slave PLC modules through the RS485 bus; the control panel is connected to a three-phase power supply, and a circuit breaker is installed on the connection line, the rear end of the circuit breaker is connected to two branches, and a circuit breaker is set on each branch; the rear ends of the circuit breakers on the two branches are respectively connected to the switching power supply 1 and the switching power supply 2; the output of the switching power supply 1 is connected to the power supply end of the main PLC module; the output of the switching power supply 2 is connected to the power supply end of multiple slave PLC modules.

[0008] Preferably, the main PLC module is connected to a 4G module.

[0009] Preferably, among the multiple split cabinets connected in series, a water flow switch is provided at the outlet of the internal pipeline of the split cabinet at the rear end; the water flow switch is electrically connected to the main PLC module.

[0010] Preferably, a pressure transmitter is provided on the connecting pipelines between the plurality of split cabinets connected in series, and the pressure transmitter is electrically connected to the main PLC module via an RS485 bus.

[0011] Preferably, among the multiple split cabinets connected in series, a temperature switch is provided at the outlet of the internal pipeline of the split cabinet at the rear end, and the temperature switch is electrically connected to the main PLC module.

[0012] Preferably, a current transformer is installed on the three-phase power supply line, and the current transformer is electrically connected to the main PLC module.

[0013] A heating method for a split electromagnetic boiler comprises the following steps:

[0014] S1: Determine the number of split cabinets based on the required heating area; connect each split cabinet to the control cabinet;

[0015] S2: Set the target heating temperature and heating time period. The circulating pump will automatically start and start heating during the heating time period. During heating, the electromagnetic heating tubes in each split cabinet will be started in sequence according to the target temperature. If the outlet temperature meets the standard, the electromagnetic heating tubes in the remaining split cabinets will stop starting. Otherwise, all will start. This prevents the power supply from being impacted by instantaneous high-power startup, achieves soft start, and effectively reduces energy consumption.

[0016] S3: After startup, the system adjusts the input voltage frequency of the electromagnetic heating tube according to the inlet temperature and outlet temperature of the pipeline in each split cabinet; and adopts multi-stage heating for the liquid in the circulation pipeline.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. This electromagnetic boiler has functions such as water cut-off protection, water pressure protection, item missing protection, and dry burning protection, which ensure the safety of electromagnetic boiler use and extend the service life of components.

[0019] 2. Through the distributed series structure, the circulating heating liquid is heated multiple times at different heating temperatures, so that the heating liquid in the circulating pipeline heats up quickly and the outlet temperature is high, ensuring the efficient operation of the electromagnetic boiler.

[0020] 3. Heating control is performed in a master-slave mode to avoid control logic confusion and mutual influence between various control loops.

[0021] 4. Use 4G module to communicate with the cloud to complete automatic remote monitoring of electromagnetic boilers. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of a split electromagnetic boiler of the present invention;

[0023] Figure 2 This is an electrical schematic diagram of a split electromagnetic boiler of the present invention;

[0024] In the figure: control cabinet 1, split cabinet 2, control panel 3, circulation pump 1 4, pressure transmitter 5, water flow switch 6, temperature switch 7, electromagnetic heating tube 21, temperature sensor 1 22, temperature sensor 2 23, main PLC module 31, touch screen 32, 4G module 33, slave PLC module 34, switching power supply 1 35, switching power supply 2 36, inverter 37, current transformer 38, circulation pump 2 41. DETAILED DESCRIPTION

[0025] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention:

[0026] like Figure 1-2As shown, in one embodiment of the present invention, a split electromagnetic boiler includes: a control cabinet 1 and multiple split cabinets 2; the control cabinet 1 is provided with a control board 3 and a circulation pump 4, and the control cabinet 1 is provided with a touch screen 32; the split cabinet 2 is internally connected with multiple electromagnetic heating tubes 21 through pipelines; the inlet of the internal pipeline of the split cabinet 2 is installed with a temperature sensor 1 22, and the outlet of the pipeline is installed with a temperature sensor 2 23; the front end of the circulation pump 4 is connected to the liquid port, and the rear end of the circulation pump 4 is connected to the inlet of the internal pipeline of one of the split cabinets 2; the multiple split cabinets 2 are connected in series, and the outlet of the internal pipeline of the previous level split cabinet 2 is connected to the inlet of the internal pipeline of the next level split cabinet 2 through a pipeline; each electromagnetic heating tube 21, temperature sensor 1 22, temperature sensor 2 23 in the split cabinet 2 is electrically connected to the control board 3; the touch screen 32 and the circulation pump 4 are electrically connected to the control board 3.

[0027] In one embodiment of the present invention, the control cabinet 1 is further provided with a second circulation pump 41, which is connected in parallel with the first circulation pump 4 and is electrically connected to the control board 3. The two circulation pumps operate alternately, extending their service life and ensuring stable system operation.

[0028] In one embodiment of the present invention, the control board 3 is provided with a master PLC module 31, multiple slave PLC modules 34, a switching power supply 1 35, a switching power supply 2 36, and multiple frequency converters 37; the output end of the master PLC module 31 is connected to the input ends of multiple slave PLC modules 34 through multiple intermediate relays KA; the output end of the master PLC module 31 is connected to two AC contactors KM through two intermediate relays KA; the contacts of the two AC contactors KM are respectively connected to the power supply ends of the circulation pump 2 41 and the circulation pump 1 4, for controlling the start and stop of the two circulation pumps; each slave PLC module 34 is connected to multiple frequency converters 37; the output of each frequency converter 37 is electrically connected to the electromagnetic heating tube 21; the temperature sensor 1 22 and the temperature sensor 2 23 installed in each split cabinet 2 are connected to the main PLC module 31 and multiple slave PLC modules 34 through the RS485 bus; the control board 3 is connected to the three-phase power supply, and a circuit breaker is installed on the connection line. The rear end of the circuit breaker is connected to two branches, and a circuit breaker is set on each branch; the rear ends of the two circuit breakers are respectively connected to the switching power supply 1 35 and the switching power supply 2 36; the output of the switching power supply 1 35 is connected to the power supply end of the main PLC module 31; the output of the switching power supply 2 36 is connected to the power supply end of multiple slave PLC modules 34.

[0029] In one embodiment of the present invention, the main PLC module 31 is connected to a 4G module 33; the 4G module 33 can be used to access the Internet cloud to remotely monitor the electromagnetic boiler.

[0030] In one embodiment of the present invention, among multiple series-connected split cabinets 2, a water flow switch 6 is provided at the outlet of the internal piping of the rearmost split cabinet 2. The water flow switch 6 is electrically connected to the main PLC module 31. It monitors the water circulation and activates water shutoff protection when there is no water flow.

[0031] In one embodiment of the present invention, in order to ensure the normal and safe operation of the circulation pipeline, a pressure transmitter 5 is provided on the connecting pipeline between the multiple split cabinets 2 connected in series, and the pressure transmitter 5 is electrically connected to the main PLC module 31 through the RS485 bus; the water pressure in the circulation pipeline is monitored to achieve high-pressure protection.

[0032] In one embodiment of the present invention, in order to prevent the heating tube from burning dry, a temperature switch 7 is provided at the outlet of the internal pipeline of the split cabinet 2 at the rear end among multiple split cabinets 2 connected in series, and the temperature switch 7 is electrically connected to the main PLC module 31.

[0033] In one embodiment of the present invention, a current transformer 38 is installed on the three-phase power supply line, and the current transformer 38 is electrically connected to the main PLC module 31. This implements the missing item protection and ensures the stable and safe operation of the equipment.

[0034] A heating method for a split electromagnetic boiler comprises the following steps:

[0035] S1: Determine the number of split cabinets according to the required heating area; connect each split cabinet 2 to the control cabinet 1;

[0036] S2: Set the target heating temperature and heating time period. During the heating time period, the circulating pump automatically turns on and starts heating. During heating, the electromagnetic heating cylinder 21 in each split cabinet is started in sequence according to the target temperature. If the outlet temperature meets the standard, the electromagnetic heating cylinders 21 in the remaining split cabinets are stopped. Otherwise, all are started. This prevents the power supply from being impacted by instantaneous high-power startup, achieves soft startup, and effectively reduces energy consumption.

[0037] S3: After startup, the system adjusts the input voltage frequency of the electromagnetic heating tube 21 according to the inlet temperature and outlet temperature of the pipeline in each split cabinet; the liquid in the circulation pipeline is heated in multiple stages (multiple heatings, and the temperature gradually increases each time); through multiple heatings at different heating temperatures, the heating liquid in the circulation pipeline heats up at a fast rate, ensuring the efficient operation of the electromagnetic boiler.

[0038] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes based on the technical solutions and improved concepts of the present invention within the technical scope disclosed by the present invention, and they should be covered by the scope of protection of the present invention.

Claims

1. A split electromagnetic boiler, comprising: A control cabinet and multiple split cabinets; characterized in that: a control panel and a circulating pump are provided in the control cabinet, and a touch screen is provided on the control cabinet; multiple electromagnetic heating tubes are connected in series through pipes inside the split cabinet; a temperature sensor 1 is installed at the inlet of the internal pipe of the split cabinet, and a temperature sensor 2 is installed at the outlet of the pipe; the front end of the circulating pump 1 is connected to the liquid port, and the rear end of the circulating pump 1 is connected to the inlet of the internal pipe of one of the split cabinets; the multiple split cabinets are connected in series, and the outlet of the internal pipe of the previous split cabinet is connected to the inlet of the internal pipe of the next split cabinet through a pipe; each electromagnetic heating tube, temperature sensor 1, and temperature sensor 2 in the split cabinet are electrically connected to the control panel; the touch screen and the circulating pump 1 are electrically connected to the control panel; The control cabinet is further provided with a second circulating pump, which is connected in parallel with the first circulating pump; the second circulating pump is electrically connected to the control panel; The control panel is provided with a master PLC module, multiple slave PLC modules, a switching power supply 1, a switching power supply 2, and multiple frequency converters; the output end of the master PLC module is connected to the input ends of multiple slave PLC modules through multiple intermediate relays KA respectively; the output end of the master PLC module is connected to two AC contactors KM through two intermediate relays KA; the contacts of the two AC contactors KM are respectively connected to the power supply ends of circulating pump 2 and circulating pump 1; each slave PLC module is connected to multiple frequency converters; the output of each frequency converter is electrically connected to the electromagnetic heating tube; the temperature sensor 1 and the temperature sensor 2 installed in each split cabinet are connected to the master PLC module and multiple slave PLC modules through the RS485 bus; the control panel is connected to a three-phase power supply, and a circuit breaker is installed on the connection line. The rear end of the circuit breaker is connected to two branches, and a circuit breaker is set on each branch; the rear ends of the circuit breakers on the two branches are respectively connected to the switching power supply 1 and the switching power supply 2; the output of the switching power supply 1 is connected to the power supply end of the master PLC module; the output of the switching power supply 2 is connected to the power supply end of multiple slave PLC modules; The main PLC module is connected to a 4G module, which is connected to the Internet cloud through the 4G module to remotely monitor the electromagnetic boiler.

2. The split-type electromagnetic boiler according to claim 1, characterized in that: Among the multiple split cabinets connected in series, a water flow switch is provided at the outlet of the internal pipeline of the split cabinet at the rear end; the water flow switch is electrically connected to the main PLC module.

3. The split-type electromagnetic boiler according to claim 1, characterized in that: The connecting pipelines between the plurality of split cabinets connected in series are provided with pressure transmitters, which are electrically connected to the main PLC module via the RS485 bus.

4. The split-type electromagnetic boiler according to claim 1, characterized in that: Among the multiple split cabinets connected in series, a temperature switch is provided at the outlet of the internal pipeline of the split cabinet at the rear end, and the temperature switch is electrically connected to the main PLC module.

5. The split-type electromagnetic boiler according to claim 1, characterized in that: A current transformer is installed on the three-phase power supply line, and the current transformer is electrically connected to the main PLC module.

6. A heating method for a split-type electromagnetic boiler according to any one of claims 1 to 5, characterized in that: The steps include: S1: Determine the number of split cabinets based on the required heating area; connect each split cabinet to the control cabinet; S2: Set the target heating temperature and heating time period. During the heating time period, the circulation pump automatically turns on and starts heating. During heating, the electromagnetic heating cylinders in each split cabinet are activated in sequence according to the target temperature. If the outlet temperature meets the target, the electromagnetic heating cylinders in the remaining split cabinets are stopped, otherwise all are activated. S3: After startup, the system adjusts the input voltage frequency of the electromagnetic heating tube according to the inlet temperature and outlet temperature of the pipeline in each split cabinet; and adopts multi-stage heating for the liquid in the circulation pipeline.

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