High-temperature furnace and heating device thereof
By employing an electric heating unit with a contactor, power regulator, and 24V transformer in the high-temperature furnace, the heating power is precisely controlled and the current pressure is reduced, solving the problem of the heating wire being easily damaged at high temperatures and achieving both safety and cost-effectiveness in the high-temperature furnace.
Patent Information
- Application Number
- CN202422852903.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-21
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-11-21
AI Technical Summary
The heating wires in existing high-temperature furnaces are prone to oxidation and burnout under high-temperature conditions, leading to safety risks and cost losses.
The heating unit consists of a contactor, power regulator, transformer, and heating wire. The heating power is precisely adjusted by the controller, and a 220V to 24V transformer is used to convert high voltage and low current into low voltage and high current, thereby reducing the loss of the heating wire.
It improves the temperature control accuracy and safety of high-temperature furnaces, reduces the wear and tear of heating wires, prevents burnout, and lowers operating costs.
Smart Images
Figure CN223691508U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to high temperature furnace structure technical field, concretely relates to a high temperature furnace and heating device thereof. BACKGROUND
[0002] A high temperature furnace is a device that can generate and maintain a high temperature environment, and is usually used in industrial and laboratory applications that require high temperature operation. High temperature furnaces can be used for metal smelting, ceramic sintering, glass manufacturing, material annealing, heat treatment, chemical experiments, etc. The working temperature of a high temperature furnace usually ranges from a few hundred degrees Celsius to thousands of degrees Celsius, depending on its specific purpose and design.
[0003] In the prior art, a high temperature furnace generally outputs a set of direct current signals to the controlled end of a solid-state relay through a controller, and controls the heating amount of the heating wire by controlling the on-off of the load end through the time period. The solid-state relay controls the power-on of the heating wire to achieve heating, and the input power is 220V or 380V alternating current. This high temperature furnace control method is simple and has low cost. However, the diameter of the general heating wire is 2mm~3mm, which is easy to oxidize and break in a super-high temperature environment, which brings safety risks and cost loss. SUMMARY
[0004] The technical problem to be solved by the utility model is to overcome the defect that the heating wire of the high temperature furnace in the prior art is directly loaded with a high-voltage power supply, which is easy to be damaged in a high-temperature use environment, thereby providing a high temperature furnace and a heating device thereof.
[0005] A heating device of a high temperature furnace, comprising a controller and an electric heating unit;
[0006] The electric heating unit comprises a contactor, a power regulator, a transformer and a heating wire; the input end of the contactor is connected with a power input, and the output end is connected with the power input end of the power regulator; the power output end of the power regulator is connected with the primary coil of the transformer, and the secondary coil of the transformer is connected with the heating wire; the heating device comprises three electric heating units, and three electric heating units are connected with three-phase power lines respectively;
[0007] The three control ends of the controller are connected with the controlled ends of the power regulators of the three electric heating units respectively, and are used for adjusting the output power of the three power regulators respectively.
[0008] Further, each electric heating unit comprises two heating wires, and the two heating wires in the electric heating unit are arranged in series.
[0009] Further, the transformer is a 220V to 24V transformer.
[0010] The high-temperature furnace comprises a furnace body; the electric heating unit comprises a first electric heating unit, a second electric heating unit and a third electric heating unit, the first electric heating unit is located at the upper part of the inner side of the furnace body, the second electric heating unit is located at the middle part of the inner side of the furnace body, and the third electric heating unit is located at the lower part of the inner side of the furnace body.
[0011] Further, the controller comprises a PID control unit, and the controller is connected to and controls the power regulator through the PID control unit.
[0012] Further, a temperature sensor is arranged in the furnace body and connected to the controller.
[0013] Further, two heating wires of one electric heating unit are respectively arranged at the left and right sides of the inner side of the furnace body and at the same horizontal height.
[0014] Further, the furnace body has a cylindrical structure and a split door structure.
[0015] Further, a heat insulation layer is arranged outside the furnace body.
[0016] Further, a movable support is arranged, the furnace body is arranged on the movable support, and the furnace body is translated through the movable support.
[0017] Beneficial effects: The high-temperature furnace and the heating device thereof are disclosed, the electric heating unit of the heating device comprises a contactor, a power regulator, a transformer and a heating wire, the input end of the contactor is connected to a power input, the output end is connected to the power input end of the power regulator, the power output end of the power regulator is connected to the primary coil of the transformer, the secondary coil of the transformer is connected to the heating wire, the heating device comprises three electric heating units, and three three-phase power lines are connected to the three electric heating units. The power regulator is used for providing heating power for the heating wire, the heating power of the heating wire is accurately controlled, the temperature control precision of the high-temperature furnace is improved, the transformer is used for supplying power for the heating wire, high-voltage small current is converted into low-voltage large current, the heating wire works in a low-voltage state, the loss of the heating wire is effectively reduced, the heating wire is prevented from being burnt out due to long-time high voltage, the safety of the high-temperature furnace is improved, and the use cost is reduced. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description only constitute some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained from these drawings without any creative effort.
[0019] Figure 1 The circuit principle diagram of the high-temperature furnace heating device of the present application.
[0020] Explanation of reference signs:
[0021] L1, A-phase line; L2, B-phase line; L3, C-phase line; N, zero line; U1, first power regulator; U2, second power regulator; U3, third power regulator; CTL1, first control end; CTL2, second control end; CTL3, third control end; S1, first contactor; S2, second contactor; S3, third contactor; T1, first transformer; T2, second transformer; T3, third transformer; EH11, first left heating wire; EH12, first right heating wire; EH21, second left heating wire; EH22, second right heating wire; EH31, third left heating wire; EH32, third right heating wire. DETAILED DESCRIPTION
[0022] In order to make the above objectives, features and advantages of the present application more apparent and comprehensible, the specific embodiments of the present application will be described in detail below with reference to the drawings. In the following description, a lot of specific details are set forth in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present application, so the present application is not limited to the specific embodiments disclosed below.
[0023] In the description of the present application, it should be understood that, in the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise explicitly limited. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.
[0024] In the present application, unless specifically stated and limited otherwise, a first feature is "on" or "under" a second feature can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "over", "above" and "on top of" the second feature can mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature. The first feature "under", "below" and "underneath" the second feature can mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is horizontally lower than the second feature.
[0025] Embodiment I:
[0026] Referring to Figure 1 The embodiment provides a heating device of a high-temperature furnace, which comprises a controller and an electric heating unit.
[0027] The electric heating unit comprises a contactor, a power regulator, a transformer and a heating wire; an input end of the contactor is connected with a power input, and an output end is connected with a power input end of the power regulator; a power output end of the power regulator is connected with a primary coil of the transformer, and a secondary coil of the transformer is connected with the heating wire; the heating device comprises three electric heating units, and three electric heating units are connected with three-phase power lines respectively.
[0028] Three control ends of the controller are connected with controlled ends of the power regulators of the three electric heating units respectively, so as to adjust output powers of the three power regulators respectively. Specifically, the controller outputs a 0-10V direct current voltage signal to the controlled ends of the power regulators according to the temperature in the furnace, so as to control the power change of the primary coil of the transformer, change the output power change of the secondary coil, and accurately control the temperature.
[0029] As a further improvement of the embodiment, each electric heating unit comprises two heating wires, and the two heating wires in the electric heating unit are arranged in series. By arranging more heating wires, the heating wires are distributed at different positions in the high-temperature furnace, so that the temperature uniformity in the high-temperature furnace can be improved.
[0030] In the embodiment, the transformer is a 220V-to-24V transformer. Thus, 24V voltage is loaded on the heating wire, so that the loss of the heating wire is lower, and the voltage safety is improved.
[0031] Specifically, the three-phase power lines comprise an A-phase line L1, a B-phase line L2, a C-phase line L3 and a zero line N; the electric heating unit comprises a first electric heating unit, a second electric heating unit and a third electric heating unit. The controller comprises a first control end CTL1, a second control end CTL2 and a third control end CTL3.
[0032] The first electric heating unit comprises a first contactor S1, a first power regulator U1, a first transformer T1, a first left heating wire EH11 and a first right heating wire EH12. The controlled end of the first power regulator U1 is connected with the first control end CTL1 of the controller; the input end of the first contactor S1 is connected with the A-phase line L1, and the output end is connected with the power input end of the first power regulator U1; the power output end of the first power regulator U1 is connected with the first end of the primary coil of the first transformer T1, the second end of the primary coil of the first transformer T1 is connected with the zero line N, the first end of the secondary coil of the first transformer T1 is connected with the first end of the first left heating wire EH11, the second end of the first left heating wire EH11 is connected with the first end of the first right heating wire EH12, and the second end of the first right heating wire EH12 is connected with the zero line N.
[0033] The second electric heating unit comprises a second contactor S2, a second power regulator U2, a second transformer T2, a second left heating wire EH21 and a second right heating wire EH22. The controlled end of the second power regulator U2 is connected with the second control end CTL2 of the controller; the input end of the second contactor S2 is connected with the B-phase line L2, and the output end is connected with the power input end of the second power regulator U2; the power output end of the second power regulator U2 is connected with the first end of the primary coil of the second transformer T2, the second end of the primary coil of the second transformer T2 is connected with the zero line N, the first end of the secondary coil of the second transformer T2 is connected with the first end of the second left heating wire EH21, the second end of the second left heating wire EH21 is connected with the first end of the second right heating wire EH22, and the second end of the second right heating wire EH22 is connected with the zero line N.
[0034] The third electric heating unit comprises a third contactor S3, a third power regulator U3, a third transformer T3, a third left heating wire EH31 and a third right heating wire EH32. The controlled end of the third power regulator U3 is connected with the third control end CTL3 of the controller; the input end of the third contactor S3 is connected with the C-phase line L3, and the output end is connected with the power input end of the third power regulator U3; the power output end of the third power regulator U3 is connected with the first end of the primary coil of the third transformer T3, the second end of the primary coil of the third transformer T3 is connected with the zero line N, the first end of the secondary coil of the third transformer T3 is connected with the first end of the third left heating wire EH31, the second end of the third left heating wire EH31 is connected with the first end of the third right heating wire EH32, and the second end of the third right heating wire EH32 is connected with the zero line N.
[0035] Embodiment two:
[0036] The embodiment provides a high-temperature furnace, and the heating device structure of the high-temperature furnace is as described in the first embodiment, the high-temperature furnace comprises a furnace body; the electric heating unit comprises a first electric heating unit, a second electric heating unit and a third electric heating unit, the first electric heating unit is located at the upper part of the inner side of the furnace body, the second electric heating unit is located at the middle part of the inner side of the furnace body, and the third electric heating unit is located at the lower part of the inner side of the furnace body.
[0037] In the embodiment, the controller comprises a PID control unit, the controller is connected to and controls the power regulator through the PID control unit, a temperature sensor is further arranged in the furnace body and connected to the controller, the temperature sensor comprises three temperature sensors arranged at the upper part, the middle part and the lower part of the high-temperature furnace respectively, and the temperature signals are collected and output to the controller, so that the temperature of different regions in the high-temperature furnace can be accurately controlled.
[0038] In the embodiment, two heating wires of one electric heating unit are arranged on the left side and the right side of the inner side of the furnace body and at the same horizontal height.
[0039] Specifically, the furnace body is in a cylindrical structure and has an openable door structure.
[0040] As a further improvement of the embodiment, a heat insulation layer is further arranged on the outer side of the furnace body.
[0041] In the embodiment, a movable support is further arranged, the furnace body is arranged on the movable support, and the furnace body is translated through the movable support.
[0042] The embodiment discloses a high-temperature furnace and a heating device thereof, the electric heating unit of the heating device comprises a contactor, a power regulator, a transformer and a heating wire, the input end of the contactor is connected to a power supply, the output end of the contactor is connected to the power input end of the power regulator, the power output end of the power regulator is connected to the primary coil of the transformer, the secondary coil of the transformer is connected to the heating wire, the heating device comprises three electric heating units, and the three electric heating units are connected to three-phase power lines. The power regulator is used for providing heating power for the heating wire, the heating power of the heating wire is accurately controlled, the temperature control precision of the high-temperature furnace is improved, the transformer is used for supplying power to the heating wire, high-voltage small current is converted into low-voltage large current, the heating wire works in a low-voltage state, the loss of the heating wire is effectively reduced, the heating wire is prevented from being burnt out due to long-time high voltage, the safety of the high-temperature furnace is improved, and the use cost is reduced.
[0043] Any combination of the technical features in the above-described embodiments can be made, and for the sake of brevity, not all possible combinations are described, however, it is to be understood that the application embraces all such possible combinations.
[0044] The above-described embodiments only express several implementation manners of the present application, and the description is relatively specific and detailed, but it should not be understood as a limitation on the patent scope of the application. It should be pointed out that for ordinary skilled persons in the art, some modifications and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A heating device of a high-temperature furnace, characterized by comprising: The controller and the electric heating unit are included. The electric heating unit includes a contactor, a power regulator, a transformer and a heating wire; the input end of the contactor is connected with the power input, and the output end is connected with the power input end of the power regulator; the power output end of the power regulator is connected with the primary coil of the transformer, and the secondary coil of the transformer is connected with the heating wire; the heating device includes three electric heating units, and the three electric heating units are connected with three-phase power lines respectively. The three control ends of the controller are connected with the controlled ends of the power regulators of the three electric heating units respectively, so as to adjust the output power of the three power regulators respectively.
2. The heating device of a high-temperature furnace according to claim 1, wherein Each electric heating unit includes two heating wires, and the two heating wires in the electric heating unit are arranged in series.
3. The heating device of a high-temperature furnace according to claim 1, wherein The transformer is a 220V-24V transformer.
4. A high-temperature furnace comprising the heating device for a high-temperature furnace according to any one of claims 1 to 3, characterized by The high-temperature furnace includes a furnace body; the electric heating unit includes a first electric heating unit, a second electric heating unit and a third electric heating unit; the first electric heating unit is located at the upper part of the inner side of the furnace body; the second electric heating unit is located at the middle part of the inner side of the furnace body; and the third electric heating unit is located at the lower part of the inner side of the furnace body.
5. A high temperature furnace as claimed in claim 4, wherein The controller includes a PID control unit, and the controller is connected with and controls the power regulator through the PID control unit.
6. A high temperature furnace as claimed in claim 4, wherein A temperature sensor is further included, which is arranged in the furnace body and connected with the controller.
7. A high temperature furnace as claimed in claim 4, wherein The two heating wires of one electric heating unit are respectively located at the left and right sides of the inner side of the furnace body and at the same horizontal height.
8. The high temperature furnace of claim 4, wherein, The furnace body is in a cylindrical structure and has an open door structure.
9. A high temperature furnace as claimed in claim 4, wherein, A heat insulation layer is further included, which is wrapped outside the furnace body.
10. The high temperature furnace of claim 4, wherein A movable support is further included, and the furnace body is arranged on the movable support and translated through the movable support.