CN109357402B

CN109357402B - Variable-frequency air heater and control method thereof

Info

Publication number: CN109357402B
Application number: CN201811092465.9A
Authority: CN
Inventors: 牛涛; 张和君; 吕安杰
Original assignee: NINGBO DEYE FREQUENCY CONVERSION TECHNOLOGY CO LTD
Current assignee: NINGBO DEYE FREQUENCY CONVERSION TECHNOLOGY CO LTD
Priority date: 2018-09-19
Filing date: 2018-09-19
Publication date: 2020-10-20
Anticipated expiration: 2038-09-19
Also published as: CN109357402A

Abstract

The invention discloses a variable-frequency air heater and a control method thereof, and the variable-frequency air heater comprises a seat plate, wherein a cylinder cover is fixedly arranged at the top end of the seat plate, a heater is fixedly arranged on one side of the cylinder cover, the heater comprises a shell, a first ventilation plate is welded on the inner wall of the shell, a second ventilation plate is attached to one side of the first ventilation plate, the first ventilation plate and the second ventilation plate are both of a porous structure, two fixed rods are welded on one side of the second ventilation plate, a connecting rod is welded at one end of each fixed rod together, a rotating bolt is welded in the middle of each connecting rod, and a mounting plate is fixedly arranged at one end of the shell. The invention has reasonable design structure, simple operation, convenient use and convenient control method, and adopts semi-automation to realize self-control even if temperature information and air volume are fed back.

Description

Variable-frequency air heater and control method thereof

Technical Field

The invention relates to the technical field of air heaters, in particular to a frequency conversion type air heater and a control method thereof.

Background

The hot air blower is the first choice product of modern industrial heat source upgrading, and the electromechanical device is the best hot air source configuration of automatic machines such as hot air conveying furnace, drying furnace, oven, packaging machine, etc. The hot air blower consists of three parts, including blower, heater and control circuit. It realizes the regulation and control of working temperature and air quantity. In addition, the hot air blower is also provided with an over-temperature protection loop for the air inlet of the ventilator and the motor and a sudden braking switch for the main circuit, so that the protection of the equipment is further improved.

The air heater is divided into an electric heating type and a fuel type, and the fuel type air heater is provided, the existing fuel type air heater has the advantages that hot air blown out when the air heater burns and generates heat has fuel smell, so that the environment is influenced, and the safety performance is single in function.

Disclosure of Invention

The invention aims to solve the defects of peculiar fuel smell and incomplete safety performance of the conventional fuel type air heater, and provides a variable frequency type air heater and a control method thereof.

In order to achieve the purpose, the invention adopts the following technical scheme:

a frequency conversion type air heater comprises a seat plate, wherein a barrel cover is fixedly arranged at the top end of the seat plate, and a heater is fixedly arranged on one side of the barrel cover;

the heater includes the casing, the inner wall welding of casing has first ventilative board, one side subsides of first ventilative board is equipped with the ventilative board of second, first ventilative board and the ventilative board of second are porous structure, one side welding of the ventilative board of second has two dead levers, the common welding of one end of dead lever has the connecting rod, the middle part welding of connecting rod has the rotation bolt, and the one end fixed mounting of casing has the mounting panel, the rotation bolt passes through the bearing and the mounting panel rotates the installation, the fixed winding of circumference outer wall that the casing extends to in the cover has the pipe of discharging fume, the one end and the casing intercommunication of pipe of discharging fume, the other end of pipe of discharging fume extends to outside the cover.

Preferably, some firearms are installed jointly to the middle part of first ventilative board and second ventilative board, fixed mounting has the mounting bracket between the inner wall of casing, the one end and the mounting bracket fixed mounting of some firearms, and the dead lever is not interfered to the mounting bracket.

Preferably, the inner wall of casing still fixed mounting have the support frame, the body of rod fixed mounting of support frame has first motor, the output shaft fixed mounting of first motor has the flabellum, the dead lever is not interfered to the support frame, one side fixed mounting of mounting panel has the second motor, the output shaft of second motor and the one end fixed mounting who rotates the bolt, and the mounting panel begins to have four wind gaps.

Preferably, the casing circumference outer wall cover is equipped with the connecting pipe, the connecting pipe welding has the honeycomb duct, the one end of honeycomb duct all communicates with the cover, and the top fixed mounting of bedplate has the air-blower, and the air-out end fixedly connected with of air-blower goes out the tuber pipe, goes out the one end and the connecting pipe intercommunication of tuber pipe.

Preferably, the cylinder cover is internally plugged with a metal heat-conducting net, and the whole device further comprises a flow regulator for regulating an igniter, a K-type thermocouple, a temperature controller, an air volume regulator and an overload protector.

A control method of a variable frequency hot air blower comprises the following steps:

s1, connecting the first motor and the second motor, connecting the igniter with the external oil supply mechanism, checking installation and starting the device;

s2, adjusting the rotating speed of the first motor through an air volume adjuster, and adjusting proper air volume;

s3, adjusting the combustion amount of the igniter through the flow regulator so as to adjust a proper heat value, detecting the temperature of the device through a temperature controller, monitoring the temperature of outlet hot air through a K-type thermocouple for feeding back to the temperature controller, and driving a second motor through an overload protector;

s4, starting the first motor, the igniter and the blower;

s5, when the equipment is out of control, the igniter generates excessive heat, the K-type thermocouple detects the temperature and transmits the temperature to the temperature controller, the temperature controller analyzes the temperature, the overload protector operates, the second motor rotates for a thirty-degree corner, the second ventilation plate is staggered with the first ventilation plate, the first motor is sealed, the first motor is prevented from being damaged by high temperature, and the fire is extinguished.

The invention has the beneficial effects that: the designed hot air blower can separate the blown hot air from the flue gas, so that the quality of the hot air is improved, and the safety protection function is realized, so that the safety performance of the machine is higher when the machine is directly fed back and stopped when problems exist;

the automatic temperature control device is reasonable in design structure, simple to operate, convenient to use and convenient to control, and semi-automation is adopted for controlling, so that automatic control is achieved even if temperature information and air quantity are fed back.

Drawings

Fig. 1 is a schematic sectional view of a frequency-variable air heater according to the present invention;

FIG. 2 is a schematic view of a connecting pipe structure of a variable frequency hot air blower according to the present invention;

fig. 3 is a schematic view of a mounting plate structure of a variable frequency hot air blower according to the present invention.

In the figure: the device comprises a base plate 1, an igniter 2, an air blower 3, a first motor 4, a second motor 5, a mounting plate 6, a connecting rod 7, a fixing rod 8, a support frame 9, a mounting frame 10, a second ventilation plate 11, a first ventilation plate 12, a smoke exhaust pipe 13, a shell 14, a metal heat conduction net 15, a cylinder cover 16, a flow guide pipe 17, a connecting pipe 18 and an air outlet pipe 19.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.

Referring to fig. 1-3, a frequency conversion type air heater comprises a seat plate 1, wherein a cylinder cover 16 is fixedly installed at the top end of the seat plate 1, and a heater is fixedly installed at one side of the cylinder cover 16;

the heater includes casing 14, the welding of casing 14's inner wall has first ventilative board 12, one side subsides of first ventilative board 12 are equipped with second ventilative board 11, first ventilative board 12 and second ventilative board 11 are porous structure, the welding of one side of second ventilative board 11 has two dead levers 8, the common welding of one end of dead lever 8 has connecting rod 7, the middle part welding of connecting rod 7 has the rotation to tie, and casing 14's one end fixed mounting has mounting panel 6, the rotation is tied and is rotated the installation through bearing and mounting panel 6, the fixed winding of circumference outer wall that casing 14 extends to in the cover 16 has exhaust pipe 13, the one end and the casing 14 intercommunication of exhaust pipe 13, the other end of exhaust pipe 13 extends to outside the cover 16.

In this embodiment, an igniter 2 is installed at the middle part of a first ventilation plate 12 and a second ventilation plate 11 together, an installation frame 10 is fixedly installed between the inner walls of a housing 14, one end of the igniter 2 is fixedly installed with the installation frame 10, the installation frame 10 does not interfere with a fixed rod 8, a support frame 9 is also fixedly installed on the inner wall of the housing 14, a first motor 4 is fixedly installed on a rod body of the support frame 9, a fan blade is fixedly installed on an output shaft of the first motor 4, the support frame 9 does not interfere with the fixed rod 8, a second motor 5 is fixedly installed on one side of a mounting plate 6, an output shaft of the second motor 5 is fixedly installed with one end of a rotating bolt, four air ports are started to be arranged on the mounting plate 6, a connecting pipe 18 is sleeved on the outer circumferential wall of the housing 14, a flow guide pipe 17 is welded on the connecting, the air outlet end of the blower 3 is fixedly connected with an air outlet pipe 19, one end of the air outlet pipe 19 is communicated with a connecting pipe 18, a metal heat conducting net 15 is plugged in the cylinder cover 16, and the whole device further comprises a flow regulator used for regulating the igniter 2, a K-type thermocouple, a temperature control instrument, an air volume regulator and an overload protector.

The working principle is as follows: when the heat-conducting smoke exhaust device is used, the first motor 4, the igniter 2 and the blower 3 are started, so that the fan blades rotate, the igniter 2 is used for flaming, the blower 3 blows wind into the cylinder cover 16, smoke combusted in the shell 14 flows from the smoke exhaust pipe 13, generated heat is conducted to the metal heat-conducting net 15, the metal heat-conducting net 15 generates heat, and the wind blown out by the blower 3 is heated through the metal heat-conducting net 15, so that heat energy exchange is realized;

when high temperature appears, make second motor 5 function to drive connecting rod 7, connecting rod 7 drives dead lever 8, and dead lever 8 drives the motion of second ventilative board 11, thereby staggers the hole of second ventilative board 11 and first ventilative board 12, makes the space airtight, thereby avoids the high temperature heat to 4 harm of first motor.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.

Claims

1. A frequency conversion type air heater comprises a seat plate (1) and is characterized in that a barrel cover (16) is fixedly installed at the top end of the seat plate (1), and a heater is fixedly installed on one side of the barrel cover (16);

the heater comprises a shell (14), a first ventilation plate (12) is welded on the inner wall of the shell (14), a second air-permeable plate (11) is attached to one side of the first air-permeable plate (12), the first air-permeable plate (12) and the second air-permeable plate (11) are both of porous structures, two fixed rods (8) are welded on one side of the second ventilating plate (11), a connecting rod (7) is welded on one end of each fixed rod (8) together, a rotating bolt is welded in the middle of each connecting rod (7), and one end of the shell (14) is fixedly provided with a mounting plate (6), the rotating bolt is rotatably arranged with the mounting plate (6) through a bearing, the shell (14) extends to the outer wall of the circumference in the cylinder cover (16) and is fixedly wound with a smoke exhaust pipe (13), one end of the smoke exhaust pipe (13) is communicated with the shell (14), and the other end of the smoke exhaust pipe (13) extends out of the cylinder cover (16).

2. The variable-frequency air heater according to claim 1, wherein the igniter (2) is installed at the middle part of the first ventilating plate (12) and the second ventilating plate (11) together, the mounting frame (10) is fixedly installed between the inner walls of the shell (14), one end of the igniter (2) is fixedly installed with the mounting frame (10), and the mounting frame (10) does not interfere with the fixing rod (8).

3. The variable-frequency air heater according to claim 2, wherein the inner wall of the casing (14) is further fixedly provided with a support frame (9), a rod body of the support frame (9) is fixedly provided with a first motor (4), an output shaft of the first motor (4) is fixedly provided with fan blades, the support frame (9) does not interfere with the fixing rod (8), one side of the mounting plate (6) is fixedly provided with a second motor (5), an output shaft of the second motor (5) is fixedly mounted with one end of the rotating bolt, and the mounting plate (6) is provided with four air ports.

4. The variable-frequency air heater according to claim 3, wherein a connecting pipe (18) is sleeved on the outer circumferential wall of the shell (14), a guide pipe (17) is welded on the connecting pipe (18), one end of the guide pipe (17) is communicated with the barrel cover (16), the top end of the seat plate (1) is fixedly provided with the air blower (3), the air outlet end of the air blower (3) is fixedly connected with an air outlet pipe (19), and one end of the air outlet pipe (19) is communicated with the connecting pipe (18).

5. The variable-frequency air heater according to claim 1, wherein the cylinder cover (16) is internally plugged with a metal heat-conducting net (15), and the whole air heater further comprises a flow regulator, a K-type thermocouple, a temperature controller, an air volume regulator and an overload protector for regulating the igniter (2).

6. The method for controlling the variable frequency hot air blower according to claim 4, comprising the steps of:

s1, connecting the circuits of the first motor (4) and the second motor (5), connecting the igniter (2) with an external oil supply mechanism, checking installation and starting the air heater;

s2, adjusting the rotating speed of the first motor (4) through an air volume adjuster, and adjusting proper air volume;

s3, adjusting the combustion amount of the igniter (2) through a flow regulator so as to adjust a proper heat value, detecting the temperature of the hot air blower by using a temperature controller, monitoring the temperature of outlet hot air by using a K-type thermocouple for feeding back to the temperature controller, and driving a second motor (5) by using an overload protector;

s4, starting the first motor (4), the igniter (2) and the blower (3);

s5, when the equipment is out of control, the igniter (2) generates excessive heat, the K-type thermocouple detects the temperature and transmits the temperature to the temperature controller, the temperature controller analyzes the temperature, the overload protector operates, the second motor (5) rotates for thirty degrees of rotation angle, the second ventilation plate (11) is staggered with the first ventilation plate (12) to realize the sealing of the first motor (4), so that the first motor (4) is prevented from being damaged by high temperature, and the fire is extinguished.