Device for reducing microwave reflectivity and protecting magnetron and microwave heating equipment

Abstract

The utility model provides a device for reducing microwave reflectivity and protecting a magnetron and microwave heating equipment, the device comprises an integrated shell, a microwave excitation mechanism, a microwave circulator mechanism and a microwave water load mechanism, the integrated shell comprises a circulator shell, an excitation cavity shell and a water load shell which are integrally arranged; a microwave excitation cavity is arranged in the excitation cavity shell, and a magnetron of the microwave excitation mechanism is arranged on the excitation cavity shell; a water load mounting cavity for mounting the microwave water load mechanism is formed in the water load shell; a circulator mounting cavity for mounting a microwave circulator mechanism is formed in the circulator shell; according to the integrated shell, the microwave excitation mechanism, the microwave circulator mechanism and the microwave water load mechanism are integrated, the integrated shell is compact in overall structure, small in occupied space, light in weight and low in cost, assembling operation can be effectively simplified, the production process can be simplified, and meanwhile compared with an assembled structure, the integrated shell can unify resistance design and reduce resistance difference.

Description

TECHNICAL FIELD

[0001] The utility model relates to a microwave heating equipment technical field, concretely relates to a device and microwave heating equipment of reducing microwave reflectivity protection magnetron. BACKGROUND

[0002] In the field of high-power microwave heating, magnetrons are often used as microwave sources, and a magnetron is a vacuum electron device for generating high-power microwave signals. Due to the cost of the equipment, the conventional microwave heating equipment does not use any protection measures for the magnetron. Serious power reflection and impedance mismatch reduce the service life of the magnetron from 10,000 hours to less than 2,000 hours. The service life of the magnetron is very low, which causes the microwave heating equipment to be frequently repaired, the utilization rate is not high, and it cannot become the mainstream heating product of energy saving and environmental protection.

[0003] To this end, the existing microwave circulator is used to control the direction of reflected waves, so that the reflected waves are absorbed by the matched load, thereby preventing the reflected waves from returning to the magnetron, thereby playing a protective role for the magnetron.

[0004] The microwave heating equipment now has a microwave circulator, a matched load, and a microwave excitation cavity connected by standard flange screws. This method has at least the following technical problems:

[0005] 1. The microwave circulator, the matched load, and the microwave excitation cavity are connected by flanges, and the installation operation is relatively cumbersome.

[0006] 2. The microwave circulator, the matched load, and the microwave excitation cavity each have a large volume.

[0007] Because the microwave heating equipment has very high power, multiple magnetrons are usually installed to meet the heating power requirements, typically 4 to 400 magnetrons. The combination of the microwave circulator, the matched load, and the microwave excitation cavity can only protect one magnetron, but the space occupied by the three components is 10 times the space occupied by one magnetron. However, the surface space of the microwave cavity of the microwave heating equipment is extremely limited, so the existing microwave circulator, matched load, and microwave excitation cavity three-piece equipment cannot be equipped on the microwave cavity at the same time.

[0008] 2. The microwave circulator, the matched load, and the microwave excitation cavity each have a large weight and are prone to deformation.

[0009] Because the weight of a single magnetron is about 1.3 to 1.7 kg, but the combined weight of the existing microwave circulator, matching load and microwave excitation cavity is about 13 to 17 kg, due to the heavy combined weight of the microwave circulator, matching load and microwave excitation cavity, the microwave cavity mounting surface of the microwave heating device is severely deformed, and the overall weight of the microwave heating device is also severely exceeded.

[0010] 3. The existing microwave circulator, matching load and microwave excitation cavity are too expensive, and the overall cost of the microwave heating device accounts for too large a proportion, and if the microwave circulator, matching load and microwave excitation cavity are installed for each magnetron, the cost of a microwave heating device will double.

[0011] 4. The microwave circulator, matching load and microwave excitation cavity are too expensive, and the overall cost of the microwave heating device accounts for too large a proportion, and if the microwave circulator, matching load and microwave excitation cavity are installed for each magnetron, the cost of a microwave heating device will double. Utility model content

[0012] The utility model discloses a kind of devices for reducing microwave reflectivity and protecting magnetron and microwave heating equipment, to solve the above technical problems existing in prior art;Many technical effects can be produced by preferred technical solutions in many technical solutions provided by the utility model;See the elaboration below.

[0013] To achieve the above object, the utility model provides the following technical scheme:

[0014] The utility model provides a kind of devices for reducing microwave reflectivity and protecting magnetron, including integral type shell, microwave excitation mechanism, microwave circulator mechanism and microwave water load mechanism, wherein: the integral type shell includes integrally arranged circulator shell, excitation cavity shell and water load shell;The inlet end of the circulator shell is connected with the excitation cavity shell, and microwave excitation cavity is arranged in the excitation cavity shell, and the microwave excitation mechanism includes magnetron, and the magnetron is connected and arranged on the excitation cavity shell;The reflection end of the circulator shell is connected with the water load shell, and water load mounting cavity is arranged in the water load shell, and the microwave water load mechanism is arranged in the water load mounting cavity;Circulator mounting cavity is arranged in the circulator shell, and the microwave circulator mechanism is arranged in the circulator mounting cavity.

[0015] Preferably, the circulator housing comprises a middle housing and a first branch housing, a second branch housing and a third branch housing which are uniformly arranged on the outside of the middle housing in the circumferential direction, wherein: the first branch housing forms the inlet end away from the port of the middle housing; the second branch housing forms the outlet end away from the port of the middle housing, and the outer edge of the outlet end is provided with a flange plate for connecting the microwave cavity; the third branch housing forms the reflection end away from the port of the middle housing.

[0016] Preferably, the circulator mounting cavity penetrates through the circulator housing to form two first mounting ports arranged oppositely; the microwave circulator mechanism comprises two ferrite assemblies which are arranged oppositely on the two first mounting ports.

[0017] Preferably, the ferrite assembly comprises a stepped support assembly, a gyromagnetic ferrite, a permanent magnet and a fixed cover, wherein: the stepped support assembly is detachably and coveringly arranged on the corresponding first mounting port; the gyromagnetic ferrite is fixedly arranged on the inside of the stepped support assembly; the permanent magnet is fixedly arranged on the outside of the stepped support assembly; and the fixed cover is arranged on the outside of the permanent magnet and connected with the stepped support assembly.

[0018] Preferably, the stepped support assembly comprises a first matching step, a second matching step and a fixed step cover plate, wherein: the first matching step is connected with the gyromagnetic ferrite; the fixed step cover plate is coveringly arranged on the outside of the first mounting port; and the second matching step is arranged between the first matching step and the fixed step cover plate.

[0019] Preferably, a plurality of mounting columns are uniformly arranged on the outside of the first mounting port in the circumferential direction, and mounting holes corresponding to the mounting columns are arranged on the fixed step cover plate, and the mounting columns pass through the corresponding mounting holes.

[0020] Preferably, the microwave water load mechanism comprises a water load container, a water load inlet pipe and a water load sealing cover, and a second mounting port is arranged on the side of the water load housing in communication with the water load mounting cavity, wherein: the water load container is inserted into the water load mounting cavity through the second mounting port; the water load sealing cover is detachably and coveringly arranged on the second mounting port; a mounting groove adapted to the water load inlet pipe is arranged in the water load sealing cover, and the end of the water load inlet pipe is inserted into the mounting groove; a through hole in communication with the mounting groove is arranged on the water load sealing cover, and the water load inlet pipe is in communication with the through hole.

[0021] Preferably, the water load housing and the water load sealing cover are connected by flanges.

[0022] Preferably, the microwave excitation mechanism comprises a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation air guide and an exhaust fan, the exhaust fan is connected with the magnetron through the heat dissipation air guide; the caliber of the heat dissipation air guide is gradually increased along the direction from the magnetron to the exhaust fan.

[0023] The utility model provides a kind of microwave heating equipment, including the device of reducing microwave reflectivity protection magnetron of any preceding.

[0024] The utility model provides a kind of device of reducing microwave reflectivity protection magnetron and microwave heating equipment at least have following beneficial effects:

[0025] The device for reducing microwave reflectivity protection magnetron includes an integrated shell, a microwave excitation mechanism, a microwave circulator mechanism and a microwave water load mechanism.

[0026] The integrated shell includes an integrated circulator shell, an excitation cavity shell and a water load shell, the inlet end of the circulator shell is connected with the excitation cavity shell, the excitation cavity shell is provided with a microwave excitation cavity, the microwave excitation mechanism includes a magnetron, and the magnetron is connected to the excitation cavity shell.

[0027] The reflection end of the circulator shell is connected with the water load shell, the water load shell is provided with a water load mounting cavity, and the microwave water load mechanism is arranged in the water load mounting cavity.

[0028] The circulator shell is provided with a circulator mounting cavity, and the microwave circulator mechanism is arranged in the ring mounting cavity.

[0029] The utility model can effectively reduce microwave reflectivity by the cooperation of the microwave circulator mechanism and the microwave water load mechanism, avoid the reflected microwave from entering the magnetron, thereby effectively ensuring the service life of the magnetron. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of 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 the 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 creative labor.

[0031] Figure 1 is a structural schematic diagram of the device for reducing microwave reflectivity of the magnetron from another perspective of the present application;

[0032] Figure 2 is a structural schematic diagram of the device for reducing microwave reflectivity of the magnetron from another perspective of the present application;

[0033] Figure 3 is an exploded schematic diagram of the device for reducing microwave reflectivity of the magnetron from a perspective of the present application;

[0034] Figure 4 is an exploded schematic diagram of the device for reducing microwave reflectivity of the magnetron from another perspective of the present application;

[0035] Figure 5 is a structural schematic diagram of the integrated shell, the microwave circulator mechanism and the microwave water load mechanism of the present application;

[0036] Figure 6 is a structural schematic diagram of the integrated shell of the present application.

[0037] Reference signs

[0038] 1, integrated shell; 11, circulator shell; 111, middle shell; 112, first branch shell; 113, second branch shell; 114, third branch shell; 115, first mounting port; 116, mounting column; 117, second mounting port; 12, excitation cavity shell; 13, water load shell; 14, flange plate; 15, fixed disc; 2, microwave excitation mechanism; 21, magnetron; 22, heat dissipation assembly; 221, exhaust fan; 222, heat dissipation air guide; 3, microwave circulator mechanism; 31, ferrite assembly; 311, gyromagnetic ferrite; 312, permanent magnet; 313, fixed cover; 314, first matching step; 315, second matching step; 316, fixed step cover plate; 4, microwave water load mechanism; 41, water load container; 42, water load water inlet pipe; 43, water load sealing cover. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical scheme and advantages of the utility model more clear, the technical scheme of the utility model will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the utility model, not all. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the scope protected by the utility model.

[0040] Embodiment 1:

[0041] The utility model provides a kind of device for reducing microwave reflectivity protection magnetron, reference Figures 1 to 6 As shown in the figure, the device for reducing microwave reflectivity protection magnetron includes integrated shell 1, microwave excitation mechanism 2, microwave circulator mechanism 3 and microwave water load mechanism 4.

[0042] Integrated shell 1 includes integrally arranged circulator shell 11, excitation cavity shell 12 and water load shell 13;The inlet end of circulator shell 11 is connected with excitation cavity shell 12, and microwave excitation cavity is arranged in excitation cavity shell 12;Microwave excitation mechanism 2 includes magnetron 21, and magnetron 21 is connected and arranged on excitation cavity shell 12;The reflection end of circulator shell 11 is connected with water load shell 13, and water load mounting cavity is arranged in water load shell 13, and microwave water load mechanism 4 is arranged in the water load mounting cavity;Circulator mounting cavity is arranged in circulator shell 11, and microwave circulator mechanism 3 is arranged in the circulator mounting cavity.

[0043] Integrated shell 1 integrates microwave excitation mechanism 2, microwave circulator mechanism 3 and microwave water load mechanism 4 in the same device, and the integrated arrangement mode can not only effectively simplify assembly operation and simplify assembly process, but also the overall structure is more compact, occupies small space, light in quality, low in cost, and compared with assembled structure, can unified resistance design, reduces resistance difference, avoids impedance mismatching problem caused by using assembled structure.

[0044] When using, magnetron 21 emits microwave in the microwave excitation cavity, enters microwave circulator mechanism 3 through the inlet end of circulator shell 11, is output by the outlet end of circulator shell 11, and the reflected microwave enters the water load mounting cavity through the reflection end of circulator shell 11 and is absorbed by microwave water load mechanism 4;In this way, the reflected microwave can be effectively reduced into magnetron 21, and the protection effect is remarkable, so as to effectively guarantee the service life of magnetron 21.

[0045] Embodiment 2:

[0046] Embodiment 2 is based on embodiment 1:

[0047] As Figures 1 to 6As shown, the circulator housing 11 comprises a middle housing 111, a first branch housing 112, a second branch housing 113 and a third branch housing 114, the first branch housing 112, the second branch housing 113 and the third branch housing 114 are uniformly distributed on the outside of the middle housing 111 in the circumferential direction, the angle between adjacent branch housings is 120°, and the circulator housing 11 is welded by non-magnetic stainless steel.

[0048] The port of the first branch housing 112 away from the middle housing 111 forms the inlet end.

[0049] The port of the second branch housing 113 away from the middle housing 111 forms the outlet end, the microwave in the microwave excitation cavity enters through the inlet end and is output to the microwave cavity through the outlet end, and the outer edge of the outlet end is provided with a flange plate 14, which connects the integrated housing 1 and the microwave cavity flange, and the connection is firm.

[0050] The port of the second branch housing 113 away from the middle housing 111 forms the reflection end.

[0051] As an optional embodiment, the circulator mounting cavity penetrates the circulator housing 11, thereby forming two oppositely arranged first mounting ports 115, and the first mounting port 115 is circular; the microwave circulator mechanism 3 comprises two ferrite assemblies 31, and the two ferrite assemblies 31 are oppositely arranged on the two first mounting ports 115.

[0052] The two ferrite assemblies 31 cooperate with each other to form a ferrite microwave circulator, which has the advantages of low dielectric loss, high energy transmission efficiency, wide applicable frequency band and strong environmental adaptability.

[0053] As an optional embodiment, the ferrite assembly 31 comprises a stepped support assembly, a gyromagnetic ferrite 311, a permanent magnet 312 and a fixed cover 313.

[0054] The stepped support assembly is detachably arranged on the corresponding first mounting port 115; the gyromagnetic ferrite 311 is fixedly arranged on the inner side of the stepped support assembly; the permanent magnet 312 is fixedly arranged on the outer side of the stepped support assembly; and the fixed cover 313 is arranged on the outer side of the permanent magnet 312 and connected with the stepped support assembly.

[0055] Specifically, the step support assembly comprises a first matching step 314, a second matching step 315 and a fixed step cover plate 316. The first matching step 314 is circular and connected with the spin magnet ferrite 311. The fixed step cover plate 316 is a circular cover plate with a diameter larger than that of the first mounting port 115, and is arranged on the outside of the first mounting port 115. The second matching step 315 is triangular and arranged between the first matching step 314 and the fixed step cover plate 316. The first matching step 314, the second matching step 315 and the fixed step cover plate are connected by threaded fasteners.

[0056] As an optional embodiment, a plurality of mounting columns 116 are uniformly arranged on the outside of the first mounting port 115 in the circumferential direction. The fixed step cover plate 316 is provided with mounting holes corresponding to the positions of the mounting columns 116. The mounting columns 116 pass through the corresponding mounting holes.

[0057] The plurality of mounting columns 116 and the plurality of mounting holes cooperate with each other to balance the stress on the ferrite assembly 31 and ensure stable installation.

[0058] As an optional embodiment, the microwave water load mechanism 4 comprises a water load container 41, a water load inlet pipe 42 and a water load sealing cover 43. A second mounting port 117 is arranged on the side of the water load shell 13 and communicates with the water load mounting cavity. The second mounting port 117 is a circular port, and the plane where the second mounting port 117 is located is perpendicular to the plane where the first mounting port 115 is located.

[0059] The water load container 41 is a cylindrical container which is inserted into the water load mounting cavity along the second mounting port 117. The water load sealing cover 43 is detachably arranged on the second mounting port 117. The water load sealing cover 43 is provided with a mounting groove which is adapted to the water load inlet pipe 42. The end of the water load inlet pipe 42 is inserted into the mounting groove. A communication hole is coaxially arranged at the bottom of the mounting groove. A through hole is radially arranged on the circumferential wall of the water load sealing cover 43. The through hole communicates with the mounting groove through the communication hole. In this way, the water load inlet pipe 42 communicates with the through hole, and the water load inlet pipe 42, the communication hole and the through hole form a water flow channel.

[0060] As an optional embodiment, a fixed disc 15 is arranged on the outer edge of the second mounting port 117 of the water load shell 13. The water load sealing cover 43 is flange-connected with the fixed disc 15.

[0061] As an optional embodiment, the microwave excitation mechanism 2 comprises a heat dissipation assembly 22. The heat dissipation assembly 22 comprises a heat dissipation air guide 222 and an exhaust fan 221. The exhaust fan 221 is connected with the magnetron 21 through the heat dissipation air guide 222.

[0062] The diameter of the heat dissipation air guide 222 increases in the direction from the magnetron 21 to the exhaust fan 221, and the heat dissipation air guide 222 is a prismatic shape.

[0063] Example 3

[0064] Example 3 is based on the basis of example 2:

[0065] The utility model provides a kind of microwave heating equipment, and the microwave heating equipment includes the device of the magnetron of reducing microwave emissivity protection.

[0066] In the description of the present application, it needs to be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", "top", "bottom" and the like is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.

[0067] In addition, the terms "first", "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include at least one of the features. In the description of the present application, the meaning of "multiple", "several" is at least two, such as two, three, etc., unless otherwise specifically limited.

[0068] In the present application, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be broadly understood, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; 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 of two elements, unless otherwise specifically limited. For ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0069] The above is only a specific embodiment of the utility model, but the protection scope of the utility model is not limited to this, any skilled in the art can easily think of changes or replacements within the technical range disclosed by the utility model, which should be covered within the protection scope of the utility model. Therefore, the protection scope of the utility model should be subject to the protection scope of the claims.

Claims

1. An apparatus for reducing the microwave reflectivity of a magnetron, comprising: The application relates to a microwave water load device, which comprises an integrated shell, a microwave excitation mechanism, a microwave circulator mechanism and a microwave water load mechanism, wherein: The integrated shell comprises an integrated circulator shell, an excitation cavity shell and a water load shell; The inlet end of the circulator shell is connected with the excitation cavity shell, the excitation cavity shell is provided with a microwave excitation cavity, the microwave excitation mechanism comprises a magnetron, and the magnetron is connected with the excitation cavity shell; The reflection end of the circulator shell is connected with the water load shell, the water load shell is provided with a water load mounting cavity, and the microwave water load mechanism is arranged in the water load mounting cavity; The circulator shell is provided with a circulator mounting cavity, and the microwave circulator mechanism is arranged in the circulator mounting cavity.

2. The device for reducing the reflectivity of a magnetron-protected microwave according to claim 1, characterized in that, The circulator shell comprises a middle shell and first, second and third branch shells which are uniformly arranged on the outer side of the middle shell in the circumferential direction, wherein: The port of the first branch shell away from the middle shell forms the inlet end; The port of the second branch shell away from the middle shell forms an outlet end, and the outer edge of the outlet end is provided with a flange plate for connecting a microwave cavity; The port of the third branch shell away from the middle shell forms the reflection end.

3. The device for reducing the reflectivity of a magnetron-protected magnetron as defined in claim 2, characterized in that The circulator mounting cavity penetrates through the circulator shell to form two oppositely arranged first mounting ports; The microwave circulator mechanism comprises two ferrite components which are oppositely arranged on the two first mounting ports.

4. The device for reducing the reflectivity of a magnetron-protected magnetron according to claim 3, characterized in that The ferrite component comprises a stepped support component, a gyromagnetic ferrite, a permanent magnet and a fixing cover, wherein: The stepped support component is detachably and coveringly arranged on the corresponding first mounting port; The gyromagnetic ferrite is fixedly arranged on the inner side of the stepped support component; The permanent magnet is fixedly arranged on the outer side of the stepped support component; The fixing cover is arranged on the outer side of the permanent magnet and is connected with the stepped support component.

5. The device for reducing the reflectivity of a magnetron-protected magnetron as defined in claim 4, characterized in that The stepped support component comprises a first matching step, a second matching step and a fixed step cover plate, wherein: The first matching step is connected with the gyromagnetic ferrite; The fixed step cover plate is coveringly arranged on the outer side of the first mounting port; The second matching step is arranged between the first matching step and the fixed step cover plate.

6. The device for reducing the reflectivity of a magnetron according to claim 5, characterized in that, The outer side of the first mounting port is uniformly provided with a plurality of mounting columns, the fixed step cover plate is provided with mounting holes corresponding to the positions of the mounting columns, and the mounting columns pass through the corresponding mounting holes.

7. The device for reducing the reflectivity of a magnetron-protected magnetron as defined in claim 1, characterized in that The microwave water load mechanism comprises a water load container, a water load water inlet pipe and a water load sealing cover, and the water load shell is provided with a second mounting port on the side surface and in communication with the water load mounting cavity, wherein: The water load container is inserted into the water load mounting cavity along the second mounting port; The water load sealing cover is detachably and coveringly arranged on the second mounting port; The water load sealing cover is provided with a mounting groove matched with the water load water inlet pipe, the end of the water load water inlet pipe is inserted into the mounting groove, the water load sealing cover is provided with a through hole in communication with the mounting groove, and the water load water inlet pipe is in communication with the through hole.

8. The device for reducing the reflectivity of a magnetron-protected magnetron as defined in claim 7, characterized in that The water load shell is connected with the water load sealing cover flange.

9. The device for reducing the reflectivity of a magnetron according to claim 1, characterized in that, The microwave exciting mechanism comprises a heat dissipation assembly, the heat dissipation assembly comprises a heat dissipation air guide and an exhaust fan, the exhaust fan is connected with the magnetron through the heat dissipation air guide. The caliber of the heat dissipation air guide is gradually increased along the direction from the magnetron to the exhaust fan.

10. A microwave heating apparatus characterized by comprising: A device for reducing the microwave reflectivity of a magnetron comprising the device of any one of claims 1-9.

Images