Multifunctional microwave high-temperature muffle furnace

Abstract

This utility model provides a multifunctional microwave high-temperature muffle furnace, comprising a furnace body, a microwave generator, a microwave leak-proof furnace door, two horizontal metal connecting pipes, a quartz tube, and two insulating plugs. The furnace body includes a microwave resonant cavity, with a horizontal channel on each opposite side of the cavity. The first end of each horizontal channel communicates with the cavity, and the second end penetrates the outer shell. The horizontal metal connecting pipes are connected to the second ends of the corresponding horizontal channels. The metal end caps, horizontal metal connecting pipes, horizontal channels, and microwave resonant cavity constitute a tubular furnace cavity. The quartz tube is detachably inserted into the cavity. The two insulating plugs are used to seal the horizontal channels when the quartz tube is not inserted. This multifunctional microwave high-temperature muffle furnace combines the functions of a box furnace and a tubular furnace, allowing selection based on the materials to be processed. This improves equipment utilization and material handling flexibility, and helps reduce equipment purchase costs.

Description

Technical Field

[0001] This utility model belongs to the field of microwave heating equipment technology, specifically relating to the structural improvement of a microwave high-temperature muffle furnace. Background Technology

[0002] A high-temperature muffle furnace is a general-purpose heating device. A microwave high-temperature muffle furnace is a type of high-temperature muffle furnace that uses microwave electromagnetic fields to replace traditional electric heating elements. High-temperature muffle furnaces are usually box-type structures; correspondingly, microwave high-temperature muffle furnaces are mainly box-type microwave high-temperature muffle furnaces.

[0003] Box-type microwave high-temperature muffle furnaces have a large furnace cavity volume, allowing them to process a wide range of material volumes, from small to large. However, the furnace cavity and the outer insulation layer cannot be completely sealed. When processing volatile materials, the volatilized material can easily contaminate the furnace cavity and insulation layer. Although the furnace cavity can be disassembled for cleaning, the insulation layer is not easy to disassemble, making cleaning difficult. Residual volatile materials can affect the accuracy of processing other materials. Generally, they are only suitable for high-temperature processing of non-volatile materials, thus limiting the application range of microwave high-temperature muffle furnaces.

[0004] Therefore, there is an urgent need to design a multifunctional microwave high-temperature muffle furnace to enrich its application scenarios, improve equipment utilization and material handling flexibility, and reduce equipment purchase costs. Summary of the Invention

[0005] This invention provides a multifunctional microwave high-temperature muffle furnace, which improves equipment utilization and material handling flexibility, and also helps to reduce equipment purchase costs.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is a multifunctional microwave high-temperature muffle furnace, comprising:

[0007] The furnace body includes a microwave resonant cavity, which comprises an outer shell, a heat insulation layer, and a microwave resonant cavity body arranged sequentially from the outside to the inside. The microwave resonant cavity body has an opening on one side. A horizontal channel is provided on each of the opposite sides of the microwave resonant cavity body. The first end of the horizontal channel is connected to the microwave resonant cavity body, and the second end passes through the outer shell.

[0008] A microwave generator, mounted on the outer casing, is used to feed microwaves into the microwave resonant cavity.

[0009] A microwave leak-proof oven door is located on one side of the microwave resonant cavity and is used to seal the opening of the microwave resonant cavity.

[0010] Two horizontal metal connecting tubes are located outside the microwave resonant cavity and are arranged one-to-one with the two horizontal channels. Their first ends are connected to the outer shell and are connected to the second ends of the corresponding horizontal channels. The second ends of the two horizontal metal connecting tubes are detachably sealed with a metal end cap. The metal end caps, the horizontal metal connecting tubes, and the horizontal channels are arranged coaxially and together with the microwave resonant cavity form a tubular furnace cavity.

[0011] Quartz tube, for removable insertion into the tubular furnace cavity;

[0012] Two insulating plugs are provided, each corresponding to one of the two horizontal channels, to block the horizontal channels when the quartz tube is not inserted into the tubular furnace cavity.

[0013] The technical solution of this utility model also includes the following additional technical features:

[0014] The metal end cap has a through central hole; an air inlet pipe connector assembly is connected to the central hole of one of the metal end caps, the air inlet pipe connector assembly includes an air inlet short pipe, an air inlet switch valve and a pressure gauge provided on the air inlet short pipe; an air outlet pipe connector assembly is connected to the central hole of the other metal end cap, the air outlet pipe connector assembly includes an air outlet short pipe, an air outlet switch valve and a vacuum connector provided on the air outlet short pipe.

[0015] The microwave resonant cavity is connected to an air inlet pipe and an air outlet pipe.

[0016] An annular step portion coaxial with the second end of the horizontal metal connecting pipe is formed on the inner wall. The end face of the annular step portion is away from the horizontal channel. A sealing assembly is installed on the annular step portion to achieve the sealed installation of the metal end cap. The sealing assembly includes multiple sealing rubber rings and multiple steel rings arranged coaxially. The sealing rubber rings and steel rings are arranged alternately. The metal end cap abuts against the outermost sealing rubber ring, and the innermost steel ring abuts against the annular step portion.

[0017] When the quartz tube is inserted into the tubular furnace cavity, the outer walls of both ends of the quartz tube are in contact with the sealing assembly.

[0018] The two horizontal channels are arranged parallel to the opening of the microwave resonant cavity.

[0019] The two horizontal channels are symmetrically arranged relative to the microwave resonant cavity, and the two horizontal metal connecting pipes are symmetrically arranged relative to the microwave resonant cavity.

[0020] The insulation layer is a ceramic insulation layer, and the insulation plug is a ceramic plug.

[0021] The microwave leak-proof furnace door includes a microwave leak-proof furnace door body and an insulation block separate from the microwave leak-proof furnace door body. The insulation block is used to be detachably placed inside the opening of the microwave resonant cavity to seal the opening of the microwave resonant cavity.

[0022] The microwave generator consists of multiple magnetrons arranged on the outer casing, and the microwave generator and the microwave leak-proof furnace door are located on opposite sides of the axis of the horizontal channel.

[0023] Compared with the prior art, the present invention has the following advantages and positive effects:

[0024] This utility model discloses a multifunctional microwave high-temperature muffle furnace. When processing large-volume non-volatile materials, a quartz tube is not inserted into the tubular furnace cavity, and the horizontal channel is sealed with an insulating plug, making the muffle furnace resemble a box-type microwave high-temperature muffle furnace. The material undergoes microwave high-temperature treatment directly within the microwave resonant cavity. When processing small-volume volatile materials, the insulating plug is removed, and a quartz tube is inserted into the tubular furnace cavity, making the muffle furnace resemble a tubular furnace. The material undergoes microwave high-temperature treatment within the quartz tube inserted through the microwave resonant cavity, preventing material volatilization from contaminating the microwave resonant cavity. The quartz tube is removable and easy to clean. Therefore, this utility model discloses a multifunctional microwave high-temperature muffle furnace that combines the functions of a box-type microwave high-temperature muffle furnace and a tubular furnace. The appropriate furnace can be selected based on the material being processed, improving equipment utilization and material processing flexibility. It eliminates the need to purchase separate box-type and tubular microwave high-temperature muffle furnaces, thus reducing equipment purchase costs. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a vertical cross-sectional view of a multifunctional microwave high-temperature muffle furnace in an embodiment of the present invention, omitting the quartz tube and the insulation blockage.

[0027] Figure 2 for Figure 1 Enlarged view of part A;

[0028] Figure 3 This is a horizontal cross-sectional view of a multifunctional microwave high-temperature muffle furnace in an embodiment of the present invention, omitting the quartz tube and the insulation blockage.

[0029] Figure 4This is a vertical cross-sectional view of a multifunctional microwave high-temperature muffle furnace with a quartz tube inserted, as described in an embodiment of this utility model.

[0030] Figure 5 for Figure 4 Enlarged view of part B;

[0031] Figure 6 This is a vertical cross-sectional view of a multifunctional microwave high-temperature muffle furnace used for heat preservation, blocking, and sealing of a horizontal channel, according to an embodiment of this utility model.

[0032] Reference numerals: 100, furnace body; 110, microwave resonant cavity; 111, outer shell; 112, insulation layer; 113, microwave resonant cavity body; 114, opening; 115, horizontal channel; 116, temperature sensor; 120, frame; 200, microwave generator; 300, microwave leak-proof furnace door; 310, microwave leak-proof furnace door body; 320, insulation block; 400, horizontal metal connecting pipe; 410, annular stepped section; 500, metal end cap; 510, center hole; 60 0. Quartz tube; 700. Crucible; 800. Insulation plug; 900. Microwave power supply; 1000. Inlet pipe connector assembly; 1100. Inlet short pipe; 1110. Inlet switch valve; 1120. Pressure gauge; 2000. Outlet pipe connector assembly; 2100. Outlet short pipe; 2110. Outlet switch valve; 2120. Vacuum connector; 3000. Sealing assembly; 3100. Sealing ring; 3120. Steel ring; 4000. Inlet pipe; 5000. Outlet pipe. Detailed Implementation

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] Reference Figures 1 to 6 This utility model embodiment of a multifunctional microwave high-temperature muffle furnace includes a furnace body 100, a microwave generator 200, a microwave leak-proof furnace door 300, two horizontal metal connecting pipes 400, a quartz tube 600, and two heat-insulating plugs 800.

[0036] The furnace body 100 includes a frame 120 and a microwave resonant cavity 110 disposed on the frame 120. The microwave resonant cavity 110 includes an outer shell 111, a heat insulation layer 112, and a microwave resonant cavity body 113 arranged sequentially from the outside to the inside. The outer shell 111 is a non-wave-transparent metal shell, and the heat insulation layer 112 is a highly wave-transparent ceramic fiber heat insulation layer. The microwave resonant cavity body 113 has an opening 114 on one side, which penetrates the heat insulation layer 112 and the outer shell 111, allowing materials to be placed or removed into the microwave resonant cavity body 113 through the opening 114. A horizontal channel 115 is provided on each of the opposite sides of the microwave resonant cavity body 113. The horizontal channel 115 is a through horizontal straight channel, with its first end connected to the microwave resonant cavity body 113 and its second end penetrating the outer shell 111. Figure 1 , Figure 3 From the view shown, the two horizontal channels 115 are located on the left and right sides of the microwave resonant cavity 113.

[0037] A microwave generator 200 is mounted on the outer shell 111 of the microwave resonant cavity 110 and is used to feed microwaves into the microwave resonant cavity 113. A temperature sensor 116 is provided on the microwave resonant cavity 110 for real-time detection of the internal temperature of the resonant cavity 113.

[0038] The microwave leak-proof oven door 300 is located on one side of the microwave resonant cavity 110 and is used to seal the opening 114 of the microwave resonant cavity 113, making the microwave resonant cavity 113 a closed and sealed cavity.

[0039] Two horizontal metal connecting pipes 400 are located outside the microwave resonant cavity 110, corresponding one-to-one with two horizontal channels 115. The horizontal metal connecting pipes 400 are through horizontal straight pipes, and their first ends can be welded to the outer shell 111 and connected to the second end of the corresponding horizontal channel 115. The second ends of the two horizontal metal connecting pipes 400 form flanges, and a metal end cap 500 is detachably and sealed to the flanges. The metal end cap 500, the horizontal metal connecting pipes 400, and the horizontal channels 115 are coaxially arranged and together with the microwave resonant cavity 113 form a tubular furnace cavity.

[0040] The quartz tube 600 is an independent component, designed for detachable insertion into the tubular furnace cavity; that is, the quartz tube 600 can be inserted into or removed from the tubular furnace cavity. Inserting the quartz tube 600 into the tubular furnace cavity allows this utility model of a multifunctional microwave high-temperature muffle furnace to achieve a tubular furnace shape. Figure 4 and Figure 5 As shown, the material undergoes microwave high-temperature treatment inside a quartz tube 600 inserted through a microwave resonant cavity 113.

[0041] Specifically, the material can be placed in the crucible 700, which is placed inside the quartz tube 600. The metal end cap 500 at one end is opened, and the quartz tube 600 is inserted into the tube furnace cavity. After the quartz tube 600 where the crucible 700 is located is in the microwave resonant cavity 113, the metal end cap 500 is closed, and the material can be subjected to microwave high-temperature treatment. This method can be used for microwave high-temperature treatment of volatile materials or other conditions suitable for tube furnace treatment.

[0042] Two insulating plugs 800 are correspondingly installed in pairs with two horizontal channels 115. These plugs are detachably inserted into the horizontal channels 115 to seal them when the quartz tube 600 is not inserted into the tubular furnace cavity. In other words, when the quartz tube 600 is not inserted into the tubular furnace cavity, the insulating plugs 800 are inserted into the horizontal channels 115 to seal them, thus giving this invention the form of a box-type microwave high-temperature muffle furnace. Figure 6 As shown, the material is directly subjected to microwave high-temperature treatment inside the microwave resonant cavity 113.

[0043] Specifically, the material can be placed in the crucible 700, and the crucible 700 can be directly placed in the microwave resonant cavity 113 to perform microwave high-temperature treatment on the material. Since the microwave resonant cavity 113 of the box-type microwave high-temperature muffle furnace has a large volume, it can be used for microwave high-temperature treatment of large-volume non-volatile materials, or other working conditions suitable for box-type microwave high-temperature muffle furnace treatment.

[0044] In some embodiments of this utility model, the heat insulation plug 800 is a high-transmittance ceramic plug.

[0045] In some embodiments of this utility model, the microwave leak-proof furnace door 300 includes a microwave leak-proof furnace door body 310 and a heat-insulating block 320 independent of the microwave leak-proof furnace door body 310. The heat-insulating block 320 is detachably placed inside the opening 114 of the microwave resonant cavity 113. That is, the heat-insulating block 320 is a separate block structure that is adapted to the opening 114 of the microwave resonant cavity 113. When placed inside the opening 114, it can seal the opening 114 of the microwave resonant cavity 113, and at the same time, in conjunction with closing the microwave leak-proof furnace door body 310, it makes the microwave resonant cavity 113 a closed and airtight cavity required for microwave high-temperature processing. After opening the microwave leak-proof furnace door body 310 and removing the heat-insulating block 320, materials can be placed or removed into the microwave resonant cavity 113. The heat-insulating block 320 can specifically be a high-transmittance ceramic block.

[0046] In some embodiments of this utility model, the microwave generator 200 consists of multiple magnetrons arranged on the outer casing 111, transmitting microwaves to the microwave resonant cavity 113 via a metal waveguide. The microwave generator 200 and the microwave leak-proof oven door 300 are located on opposite sides of the axis of the horizontal channel 115. Figure 3Taking the shown perspective as an example, the microwave generator 200 and the microwave leak-proof oven door 300 are located on the front and rear sides of the axis of the horizontal channel 115. The microwave generator 200 is arranged on the rear side of the microwave resonant cavity 110, and the microwave leak-proof oven door 300 is arranged on the front side of the microwave resonant cavity 110. The horizontal channel 115 is located on the left and right sides of the microwave resonant cavity 110 to facilitate the installation and layout of each component. The specific structure of the magnetron and the microwave leak-proof oven door 300 can adopt existing technology, which will not be described in detail here.

[0047] A microwave power supply 900 is installed on the frame 120 of the furnace body 100 to provide power for the operation of the microwave generator 200. The frame 120 is also provided with a through hole for a horizontal metal connecting pipe 400 to pass through, and the horizontal metal connecting pipe 400 is supported in the through hole to maintain stability.

[0048] In some embodiments of this utility model, such as Figures 1 to 6 As shown, the metal end cap 500 has a through central hole 510; one of the metal end caps 500 has an air inlet pipe connector assembly 1000 connected to the central hole 510, the air inlet pipe connector assembly 1000 includes an air inlet short pipe 1100, an air inlet switch valve 1110 provided on the air inlet short pipe 1100 and a pressure gauge 1120; the other metal end cap 500 has an air outlet pipe connector assembly 2000 connected to the central hole 510, the air outlet pipe connector assembly 2000 includes an air outlet short pipe 2100, an air outlet switch valve 2110 provided on the air outlet short pipe 2100 and a vacuum connector 2120.

[0049] Air can be introduced into the quartz tube 600 through the intake pipe connector assembly 1000 and its metal end cap 500, such as by introducing protective gas or reactive gas, to create an atmospheric environment inside the quartz tube 600. The intake switch valve 1110 is used to control the opening and closing of the intake short pipe 1100. The pressure gauge 1120 is used to monitor the intake pressure. The pressure gauge 1120 can be installed on a branch short pipe connected to the intake short pipe 1100. A switch valve can also be installed on the branch short pipe.

[0050] For the case where the gas is generated after the material reaction inside the quartz tube 600, the generated gas can be discharged through the gas outlet pipe connector assembly 2000 and its metal end cap 500. The gas outlet switch valve 2110 is used to control the opening and closing of the gas outlet short pipe 2100. For cases where a vacuum environment is required during processing, a vacuuming device can be connected to the vacuuming connector 2120 for vacuuming. The vacuuming connector 2120 can be installed on a branch short pipe connected to the gas outlet short pipe 2100. A switch valve can also be installed on the branch short pipe to control the opening and closing of the branch short pipe where the vacuuming connector is located.

[0051] By setting up the inlet pipe connector assembly 1000 and the outlet pipe connector assembly 2000, the flexibility of the multifunctional microwave high-temperature muffle furnace in this utility model embodiment is further improved, making it applicable to more microwave high-temperature processing conditions.

[0052] In some embodiments of this utility model, such as Figure 1 and Figure 6 As shown, the microwave resonant cavity 113 is connected to an inlet pipe 4000 and an outlet pipe 5000. When this utility model is used in the form of a box-type microwave high-temperature muffle furnace, air can be introduced into the microwave resonant cavity 113 through the inlet pipe 4000, such as a protective gas or a reactive gas, to create an atmospheric environment inside the microwave resonant cavity 113, which meets the requirements for processing materials that need to be vented for microwave high-temperature treatment. The outlet pipe 5000 can discharge the gas (such as the gas generated during material processing) inside the microwave resonant cavity 113. Switch valves are respectively installed on the inlet pipe 4000 and the outlet pipe 5000 to control the opening and closing of the inlet pipe 4000 and the outlet pipe 5000, respectively.

[0053] In some embodiments of this utility model, such as Figure 2 and Figure 5 As shown, an annular step portion 410 is formed on the inner wall of the second end of the horizontal metal connecting pipe 400, which is coaxial with it. The end face of the annular step portion 410 is away from the horizontal channel 115. A sealing assembly 3000 is installed on the annular step portion 410, and the sealing installation of the metal end cap 500 is achieved through the sealing assembly 3000. The sealing assembly 3000 includes a plurality of sealing rubber rings 3100 and a plurality of steel rings 3120 arranged coaxially. The sealing rubber rings 3100 and steel rings 3120 are arranged alternately, that is, a steel ring 3120 is set between two adjacent sealing rubber rings 3100 and a sealing rubber ring 3100 is set between two adjacent steel rings 3120. The outermost sealing rubber ring 3100 is the outermost sealing rubber ring 3100 and the innermost steel ring 3120 is the innermost steel ring 3120. The metal end cap 500 abuts against the outermost sealing rubber ring 3100 and the innermost steel ring 3120 abuts against the annular step portion 410. This multi-stage sealing design improves the sealing performance of the tubular furnace cavity and enhances the material processing effect of the multifunctional microwave high-temperature muffle furnace in the embodiment of this utility model.

[0054] When the quartz tube 600 is inserted into the tubular furnace cavity, the outer walls of both ends of the quartz tube 600 are in contact with the sealing component 3000. The sealing component 3000 can support and guide the installation of the quartz tube 600, so that the quartz tube 600 is stably inserted into the tubular furnace cavity and avoids shaking.

[0055] In some embodiments of this utility model, two horizontal channels 115 are arranged parallel to the opening 114 of the microwave resonant cavity 113.

[0056] In some embodiments of this utility model, two horizontal channels 115 are symmetrically arranged relative to the microwave resonant cavity 113, and two horizontal metal connecting pipes 400 are symmetrically arranged relative to the microwave resonant cavity 113 to facilitate processing and installation.

[0057] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model.

Claims

1. A multifunctional microwave high-temperature muffle furnace, characterized in that, include: The furnace body includes a microwave resonant cavity, which comprises an outer shell, a heat insulation layer, and a microwave resonant cavity body arranged sequentially from the outside to the inside. The microwave resonant cavity body has an opening on one side. A horizontal channel is provided on each of the opposite sides of the microwave resonant cavity body. The first end of the horizontal channel is connected to the microwave resonant cavity body, and the second end passes through the outer shell. A microwave generator, mounted on the outer casing, is used to feed microwaves into the microwave resonant cavity. A microwave leak-proof oven door is located on one side of the microwave resonant cavity and is used to seal the opening of the microwave resonant cavity. Two horizontal metal connecting tubes are located outside the microwave resonant cavity and are arranged one-to-one with the two horizontal channels. Their first ends are connected to the outer shell and are connected to the second ends of the corresponding horizontal channels. The second ends of the two horizontal metal connecting tubes are detachably sealed with a metal end cap. The metal end caps, the horizontal metal connecting tubes, and the horizontal channels are arranged coaxially and together with the microwave resonant cavity form a tubular furnace cavity. Quartz tube, for removable insertion into the tubular furnace cavity; Two insulating plugs are provided, each corresponding to one of the two horizontal channels, to block the horizontal channels when the quartz tube is not inserted into the tubular furnace cavity.

2. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, The metal end cap has a through central hole; an air inlet pipe connector assembly is connected to the central hole of one of the metal end caps, the air inlet pipe connector assembly includes an air inlet short pipe, an air inlet switch valve and a pressure gauge provided on the air inlet short pipe; an air outlet pipe connector assembly is connected to the central hole of the other metal end cap, the air outlet pipe connector assembly includes an air outlet short pipe, an air outlet switch valve and a vacuum connector provided on the air outlet short pipe.

3. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, The microwave resonant cavity is connected to an air inlet pipe and an air outlet pipe.

4. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, An annular step portion coaxial with the second end of the horizontal metal connecting pipe is formed on the inner wall. The end face of the annular step portion is away from the horizontal channel. A sealing assembly is installed on the annular step portion to achieve the sealed installation of the metal end cap. The sealing assembly includes multiple sealing rubber rings and multiple steel rings arranged coaxially. The sealing rubber rings and steel rings are arranged alternately. The metal end cap abuts against the outermost sealing rubber ring, and the innermost steel ring abuts against the annular step portion.

5. The multifunctional microwave high-temperature muffle furnace according to claim 4, characterized in that, When the quartz tube is inserted into the tubular furnace cavity, the outer walls of both ends of the quartz tube are in contact with the sealing assembly.

6. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, The two horizontal channels are arranged parallel to the opening of the microwave resonant cavity.

7. The multifunctional microwave high-temperature muffle furnace according to claim 6, characterized in that, The two horizontal channels are symmetrically arranged relative to the microwave resonant cavity, and the two horizontal metal connecting pipes are symmetrically arranged relative to the microwave resonant cavity.

8. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, The insulation layer is a ceramic insulation layer, and the insulation plug is a ceramic plug.

9. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, The microwave leak-proof furnace door includes a microwave leak-proof furnace door body and an insulation block separate from the microwave leak-proof furnace door body. The insulation block is used to be detachably placed inside the opening of the microwave resonant cavity to seal the opening of the microwave resonant cavity.

10. The multifunctional microwave high-temperature muffle furnace according to claim 1, characterized in that, The microwave generator consists of multiple magnetrons arranged on the outer casing, and the microwave generator and the microwave leak-proof furnace door are located on opposite sides of the axis of the horizontal channel.

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