CN211260896U

CN211260896U - Double-frequency conversion heating furnace

Info

Publication number: CN211260896U
Application number: CN201922271909.1U
Authority: CN
Inventors: 赵在满; 凌奇宏
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2019-12-16
Filing date: 2019-12-16
Publication date: 2020-08-14
Anticipated expiration: 2029-12-16

Abstract

The utility model discloses a double-frequency conversion heating furnace, which comprises a furnace body, wherein a furnace chamber is formed inside the furnace body, a magnetron component and a frequency converter component are arranged outside the furnace body, and the magnetron component is used for generating microwave into the furnace chamber; the magnetron assemblies are two groups, and the two groups of magnetron assemblies are respectively provided with a frequency converter assembly electrically connected with the magnetron assemblies. The utility model adopts the structure that two groups of magnetic control tube assemblies are arranged outside the furnace body, and the frequency converter assemblies are respectively arranged on each group of magnetic control tube assemblies, so that the two groups of magnetic control tube assemblies run simultaneously, thereby realizing the rapid microwave heating in the furnace chamber and further accelerating the efficiency of cooking food; because two sets of magnetron subassemblies feed into the microwave respectively in to the furnace chamber, can make the homogeneity of microwave heating better in the furnace chamber, and then make food can the even heating, when improving the efficiency of cooking food, improve the homogeneity of food cooking.

Description

Double-frequency conversion heating furnace

Technical Field

The utility model relates to a kitchen appliance field, in particular to two variable frequency heating furnace.

Background

The microwave oven is composed of power supply, magnetron, control circuit and cooking cavity. The power supply provides about 4000V high voltage to the magnetron, which continuously generates microwave under the excitation of the power supply, and the microwave is coupled into the cooking cavity through the waveguide system. Microwave energy is distributed within the cooking cavity to heat the food. In order to improve the uniformity of food heating, a rotary table is arranged in a cooking cavity of the microwave oven, and the microwave is uniformly acted on the food through the rotation of the rotary table. In the structure of a heating furnace without a turntable and the like, microwave heating is not uniform, and the food cooking effect is influenced.

SUMMERY OF THE UTILITY MODEL

The utility model mainly aims at providing a two frequency conversion heating furnaces aims at improving the problem that current heating furnace heating efficiency is low, heating homogeneity is poor.

In order to achieve the above object, the present invention provides a dual-frequency conversion heating furnace, which comprises a furnace body, wherein a furnace chamber is formed inside the furnace body, a magnetron assembly and a frequency converter assembly are arranged outside the furnace body, and the magnetron assembly is used for generating microwave into the furnace chamber;

the magnetron assemblies are two groups, and the two groups of magnetron assemblies are respectively provided with a frequency converter assembly electrically connected with the magnetron assemblies.

Optionally, a pressurizing cavity and a fan cavity are arranged outside the furnace body, a jet plate is arranged between the furnace body and the pressurizing cavity, and jet holes are formed in the jet plate;

the fan cavity is communicated with the furnace cavity through an air return hole, and the fan cavity is communicated with the pressurizing cavity through an air inlet hole;

the fan cavity is provided with a first fan, the first air sucks airflow into the fan cavity through the air return hole, the airflow in the fan cavity is input into the pressurizing cavity through the air inlet hole, and the airflow in the pressurizing cavity is jetted into the furnace cavity through the jet hole.

Optionally, the two pressurizing cavities are arranged outside the furnace body in an aligned mode, and the two pressurizing cavities are communicated with the fan cavity through the air inlet holes respectively.

Optionally, a heater is arranged in the fan cavity, and airflow is heated by the heater and then is input into the pressurization cavity through the air inlet hole.

Optionally, a magnetron heat dissipation device is arranged on the outer side of the furnace body, and the magnetron heat dissipation device corresponds to the magnetron component and is used for dissipating heat of the magnetron component.

Optionally, the magnetron heat dissipation device includes an air guide cover and a second fan, the air guide cover forms a main air duct outside the furnace body, and the magnetron component is arranged on the main air duct;

the second fan is used for driving the airflow to flow along the main air duct.

Optionally, a main air inlet cover is arranged at one end of the air guide cover, a main air inlet duct is formed in the main air inlet cover, and the main air inlet duct is communicated with the main air duct;

the furnace body outside is equipped with the controller, main air inlet duct locates the controller with between the furnace body.

Optionally, an auxiliary air inlet cover is arranged on the air guide cover, the auxiliary air inlet cover forms an auxiliary air inlet duct outside the furnace body, and the auxiliary air inlet duct is communicated with the main air duct;

and an electrical box is arranged on the outer side of the furnace body and is arranged on the auxiliary air inlet duct, so that air flow is input into the main air duct through the electrical box.

Optionally, a frequency converter heat dissipation device is arranged on the outer side of the furnace body, and the frequency converter heat dissipation device corresponds to the frequency converter assembly and is used for dissipating heat of the frequency converter assembly.

Optionally, the magnetron assembly and the frequency converter assembly are respectively arranged on two sides of the furnace body in an aligned manner.

The technical proposal of the utility model is that two groups of magnetic control tube assemblies are arranged outside the furnace body, and a frequency converter assembly is respectively arranged on each group of magnetic control tube assemblies, so that the two groups of magnetic control tube assemblies run simultaneously, thereby realizing the rapid microwave heating in the furnace chamber and further accelerating the efficiency of cooking food; because two sets of magnetron subassemblies feed into the microwave respectively in to the furnace chamber, can make the homogeneity of microwave heating better in the furnace chamber, and then make food can the even heating, when improving the efficiency of cooking food, improve the homogeneity of food cooking, help promoting and cook food quality.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic view of an external structure of a heating furnace according to an embodiment of the present invention;

FIG. 2 is a schematic view of the internal structure of a heating furnace according to an embodiment of the present invention;

FIG. 3 is a sectional view of the internal structure of a heating furnace according to an embodiment of the present invention;

FIG. 4 is a partial enlarged view of portion A of FIG. 3;

fig. 5 is a schematic view of a heat dissipation structure of a magnetron according to an embodiment of the present invention;

FIG. 6 is a schematic view of the wind scooper and the auxiliary wind scooper shown in FIG. 5;

fig. 7 is a schematic view of a heat dissipation structure of a frequency converter assembly according to an embodiment of the present invention;

fig. 8 is a schematic view of an exhaust hood according to an embodiment of the present invention.

The reference numbers illustrate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic diagram of an external structure of a heating furnace according to an embodiment of the present invention, and fig. 2 is a schematic diagram of an internal structure of a heating furnace according to an embodiment of the present invention, the present invention provides a dual-frequency conversion heating furnace, wherein the heating furnace 100 includes a furnace body 10, a furnace chamber 11 is formed inside the furnace body 10, a magnetron assembly 20 and a frequency converter assembly 50 are disposed outside the furnace body 10, and the magnetron assembly 20 is used for generating microwaves into the furnace chamber 11; the magnetron assemblies 20 are two groups, and the two groups of magnetron assemblies 20 are respectively provided with a frequency converter assembly 50 electrically connected with the magnetron assemblies. The two sets of magnetron assemblies 20 are respectively disposed outside the oven body 10 and are respectively configured to generate microwaves into the oven cavity 11 to perform microwave heating on food in the oven cavity 11.

Two sets of magnetron subassembly 20 is provided with corresponding converter subassembly 50 respectively, and two sets of converter subassembly 50 cooperatees respectively with two sets of magnetron subassembly 20 to take place the microwave in the furnace chamber 11, because two sets of converter subassembly 50 can run in step, can improve the microwave intensity in the furnace chamber 11 greatly for the cooking efficiency of food is higher, when being used for commercial heating furnace 100 especially, through improving the efficiency of microwave heating, can effectively shorten food process time, reduces the processing cost.

The magnetron assembly 20 may include a magnetron, a waveguide; the two groups of magnetron assemblies 20 are respectively provided with corresponding microwave stirring sheets, and the microwave stirring sheets scatter and input the microwaves generated by corresponding magnetrons into the oven cavity 11 so as to improve the uniformity of the microwaves; because the two sets of magnetron assemblies 20 are respectively provided with the corresponding microwave stirring pieces, microwaves can be dispersedly fed into the oven cavity 11, and the microwave heating effect is further better and uniform.

The two sets of magnetron assemblies 20 may be disposed on the top of the oven cavity 11, and simultaneously generate microwaves from the top of the oven cavity 11 into the oven cavity 11; the two groups of magnetron assemblies 20 are arranged at the top of the furnace body 10, so that the space at the top of the heating furnace 100 can be fully utilized, the space arrangement is convenient, meanwhile, the design of a heat dissipation structure of the magnetron assemblies 20 can be facilitated, the space is fully utilized, the internal structure of the heating furnace 100 is more reasonable, and meanwhile, the synchronous maintenance operation can be facilitated when the magnetron assemblies 20 are maintained; two sets of magnetron assemblies 20 may be symmetrically disposed outside the cavity 11, respectively, and microwaves are generated in the cavity 11 from two opposite directions, so that the microwaves in the cavity 11 are more uniform and the food cooking effect is better. Other functional components are also included in the heating furnace 100, and are not described in detail.

The installation positions of the magnetron assembly 20 and the frequency converter assembly 50 can be determined according to the internal space design of the heating furnace 100, and the magnetron assembly 20 and the corresponding frequency converter assembly 50 can be arranged on the same side of the heating furnace 100, so that the magnetron assembly 20 and the frequency converter assembly 50 can be conveniently connected, and the simultaneous maintenance is also convenient; the magnetron assemblies 20 and the corresponding frequency converter assemblies 50 can also be respectively arranged on different orientations of the heating furnace 100, and the positions of the corresponding magnetron assemblies 20 and the corresponding frequency converter assemblies 50 can be determined according to the arrangement of the inner space of the heating furnace 100.

In an embodiment of the present invention, the frequency converter assembly 50 and the magnetron assembly 20 are respectively aligned at two sides of the furnace body 10, so as to facilitate installation and maintenance of the magnetron assembly 20 and the frequency converter assembly 50; meanwhile, because the magnetron component 20 and the frequency converter component 50 generate heat when operating, the magnetron component 20 and the frequency converter component 50 are separately installed, so that the heat dissipation of the magnetron component 20 and the frequency converter component 50 can be conveniently realized, and the heat dissipation systems of the magnetron component 20 and the frequency converter component 50 are also conveniently designed, so that the heat dissipation systems of the magnetron component 20 and the frequency converter component 50 are respectively arranged, the local heat dissipation of each component is realized, and the heat dissipation efficiency of the system is improved.

Referring to fig. 2 and fig. 3, fig. 3 is a cross-sectional view of an internal structure of the heating furnace according to an embodiment of the present invention, when the magnetron assembly 20 generates heat, the magnetron assembly 20 is easily damaged, and in order to improve the heat dissipation performance of the magnetron assembly 20, in an embodiment of the present invention, a magnetron heat dissipation device is disposed outside the furnace body 10, and the magnetron heat dissipation device corresponds to the magnetron assembly 20 and is used for dissipating heat of the magnetron assembly 20.

The magnetron heat dissipation device can be a fan arranged outside the magnetron assembly 20, the fan drives cold air flow to make the cold air flow contact the magnetron assembly 20, and the magnetron assembly 20 is cooled in an air cooling mode; and cold sources such as an electronic ice liner and the like can be arranged at the magnetron component 20 to realize forced cooling.

In this embodiment, optionally, the magnetron heat dissipation device includes an air guide cover 21 and a second fan 23, the air guide cover 21 forms a main air duct 22 outside the furnace body 10, and the magnetron assembly 20 is disposed on the main air duct 22; the second fan 23 is used for driving the airflow to flow along the main air duct 22. When the air flow flows along the main air duct 22, the cold air flow acts on the magnetron assembly 20 to air-cool the magnetron assembly 20.

The air guide cover 21 can be a hollow cavity structure, and the main air duct 22 is formed in the inner cavity of the air guide cover, so that the air guide cover 21 can be conveniently processed; or along the airflow flowing direction, the section of the wind scooper 21 is U-shaped, so that the wind scooper 21 and the furnace body 10 enclose to form the main air duct 22. The installation position of the second fan 23 can be determined according to the structure of the wind scooper 21, the second fan 23 can be installed on the air inlet side of the wind scooper 21, and when the second fan 23 operates, cold air flow is pumped into the main air duct 22; the fan may be installed on the air outlet side of the wind scooper 21, and the second fan 23 may draw out the cold air flow from the main duct 22 to the outside when operating.

The heating furnace 100 can be provided with a front panel 14 and a rear panel 16, the front panel 14 is used as an operation side for arranging components such as a control panel 15 and a furnace door, the rear panel 16 is used as an installation side, and exhaust output ends of the furnace chamber 11 of the heating furnace 100 are all arranged on the rear panel 16 so as to avoid the output high-temperature airflow from influencing the operation of a user. When the fan 23 is installed, the second fan 23 can be disposed near the rear panel 16, and when the second fan 23 is operated, the user does not feel the output of hot air flow on the operation side of the front panel 14, so as to improve the safety of operation.

When the installation is carried out, the two groups of magnetron assemblies 20 can be arranged on the main air duct 22 of the air guide cover 21, so that the installation of the air guide cover 21 can be facilitated, and the space utilization rate of the heating furnace 100 can be improved; the two sets of magnetron assemblies 20 may also be respectively provided with the magnetron heat dissipation devices to respectively cool the two magnetrons, so as to improve the cooling effect of each magnetron assembly 20.

Referring to fig. 2, fig. 3 and fig. 5, fig. 5 is a schematic view of a heat dissipation structure of a magnetron in an embodiment of the present invention, in order to fully utilize the space of the heating furnace 100, in an embodiment of the present invention, a main air inlet cover 24 is disposed at one end of the air guiding cover 21, a main air inlet duct 25 is formed in the main air inlet cover 24, and the main air inlet duct 25 is communicated with the main air duct 22; the external portion of furnace body 10 is equipped with controller 17, main air inlet duct 25 is located between controller 17 and furnace body 10. The air flow is conveyed to the main air duct 22 along the main air inlet duct 25, and the controller 17 can be cooled in the air flow conveying process.

By installing the main air inlet duct 25 between the furnace body 10 and the controller 17, heat generated from the furnace body 10 can be prevented from acting on the controller 17; meanwhile, because when the gas flows in the main air inlet duct 25, the cold air flow can act on the controller 17 to realize the cooling of the controller 17, it is right to cool the magnetron component 20 and the controller 17, and simultaneously, make full use of the internal space of the heating furnace 100, improve the space utilization rate of the heating furnace 100, and it is beneficial to the miniaturization design of the external space of the furnace body 10 of the heating furnace 100.

The controller 17 may be attached to the outer wall of the main air inlet cover 24, or a through hole structure may be provided on the surface of the main air inlet cover 24 facing the controller 17, and one end of the controller 17 facing the main air inlet cover 24 is embedded in the through hole structure, so that when the air flow passes through the main air inlet duct 25, the air flow can act on the controller 17.

The main air inlet cover 24 can be a fan-shaped structure, and the internal sectional area of the main air inlet duct 25 is gradually reduced along the air flow direction, that is, the sectional area of the air path for air flow circulation is gradually reduced from the main air inlet duct 25 to the main air duct 22, and by adopting the main air inlet duct 15 with the gradually reduced sectional area, the air flow speed can be gradually increased in the air flow conveying process, so that the air flow acting on the magnetron assembly 20 is more concentrated in effect, and the heat dissipation effect is better.

The second fan 23 may be disposed on the air guiding hood 21, or may be disposed on the main air inlet hood 24, and the position of the second fan 23 may be selected according to the internal space layout of the heating furnace 100.

A second fan 23 may be disposed at an end of the air guiding cover 21 away from the main air inlet cover 24, so that one second fan 23 acts on two magnetron assemblies 20 at the same time, or the second fans 23 may be disposed on two sets of magnetron assemblies 20 respectively and correspondingly, and the two second fans 23 respectively correspond to the two magnetron assemblies 20, so that the two second fans 23 respectively drive the air flow to pass through the two magnetron assemblies 20 and then output the air flow to the outside of the heating furnace 100; when the two magnetron assemblies 20 operate, the two second fans 23 respectively cool and dissipate heat of the magnetron assemblies 20, so as to improve the heat dissipation efficiency of the magnetron assemblies 20.

The magnetron component can be arranged inside the air guide cover 21, or at one end of the air guide cover 21 far away from the main air inlet cover 24, and the air guide cover 21 can be designed into a structure with a gradually reduced sectional area along the air flow direction, so that the flow velocity is gradually increased when air flows in the main air duct 22, and the cooling efficiency of cold air flow on the magnetron component 20 is improved.

When the main air inlet cover 24 is installed, a main air inlet 12 may be provided on the front panel 14 of the heating furnace 100, and the main air inlet 12 is communicated with the main air inlet duct 25, so that air flow is input into the main air inlet duct 25 through the main air inlet 12. The main air inlet 12 may be disposed between the oven door of the oven body 10 and the control panel 15, when the oven door is opened, hot air generated in the oven cavity 11 overflows to the outside of the oven cavity 11, and under the action of the second fan 23, airflow overflowing from the oven cavity 11 is input into the main air inlet duct 25 through the main air inlet 12, so as to prevent hot air from attaching to the control panel 15, and prevent the control panel 15 from being atomized when the oven door is opened; meanwhile, as the hot air flow is pumped into the main air inlet 12, the user can be prevented from being scalded by the air flow overflowing from the oven cavity 11.

When the main air inlet hood 24 is installed, a heat insulation cavity 18 may be disposed between the main air inlet hood 24 and the furnace body for isolating heat generated by the furnace body 10 and preventing the air flow inputted from the main air inlet duct 25 from being heated when passing through the furnace body 10. A heat insulating cushion layer may be provided inside the heat insulating chamber 18 to enhance the heat insulating effect of the furnace body 10.

Referring to fig. 5 and fig. 6, fig. 6 is a schematic structural view of the wind scooper and the secondary air inlet cover in fig. 5, in an embodiment of the present invention, a secondary air inlet cover 26 is disposed on the wind scooper 21, the secondary air inlet cover 26 forms a secondary air inlet duct 27 outside the furnace body 10, and the secondary air inlet duct 27 is communicated with the main air duct 22; an electrical box 28 is arranged on the outer side of the furnace body 10, and the electrical box 28 is arranged on the auxiliary air inlet duct 27, so that air flow is input into the main air duct 22 through the electrical box 28. The auxiliary air inlet cover 26 is used for inputting cold air into the air guide cover 21.

When the second fan 23 is operated, cold air flow is input into the auxiliary air inlet cover 26 through the electric box 28, so that the air flow is firstly used for cooling the electric box 28, and then the air flow is conveyed to the magnetron assembly 20, and the cooling of the magnetron assembly 20 is realized.

The electrical box 28 may be a lamp control box disposed on the furnace body 10, and when the furnace body 10 operates, the lamp control box is heated, and the temperature of the lamp control box is reduced through the secondary air inlet duct 27.

The auxiliary air inlet hoods 26 may be multiple sets arranged outside the furnace body 10, or the auxiliary air inlet hoods 26 and the main air inlet hood 24 may be installed and operated at the same time, so as to input cold air into the air guiding hood 21 from multiple channels.

When the secondary air inlet cover 26 is installed, a secondary air inlet 13 may be provided on the front panel 14, so that air flows into the secondary air inlet duct 27 along the secondary air inlet 13. The secondary air inlet 13 and the primary air inlet 12 may be arranged in a staggered manner, so as to facilitate air intake from different angles. The secondary air inlet 13 may share an air flow input end with a cooling structure of other components of the heating furnace 100, so as to fully utilize the space of the heating furnace 100 and optimize the structural design.

When the furnace body 10 is installed, a gap can be formed between the furnace body 10 and the shell of the heating furnace 100, and the electronic control box 28 is arranged in the gap between the outer wall of the furnace body 10 and the shell of the heating furnace 100, so that the electronic control box 28 can be installed nearby, and the auxiliary air inlet cover 26 is communicated with the corresponding gap to facilitate the arrangement of the auxiliary air inlet duct 27. The air flow entering the secondary air inlet 13 is input to the secondary air inlet duct 27 through the slits.

Referring to fig. 7, fig. 7 is a schematic view of a heat dissipation structure of a frequency converter assembly according to an embodiment of the present invention, in order to facilitate heat dissipation of the frequency converter, in an embodiment of the present invention, a heat dissipation device of the frequency converter is disposed outside the furnace body 10, and the heat dissipation device of the frequency converter corresponds to the frequency converter assembly 50, and is used for dissipating heat of the frequency converter assembly 50. The frequency converter heat dissipation device can be a metal cover 51 and a third fan 52 which are arranged outside the frequency converter assembly 50, wherein the metal cover 51 covers the outside of the frequency converter assembly 50, so that the effect of shielding the frequency converter assembly 50 is achieved, and the frequency converter assembly 50 is prevented from being interfered; meanwhile, an airflow channel is formed in the metal cover 51, and when the third fan 52 operates, cold airflow is conveyed to the frequency converter assembly 50 through the airflow channel in the metal cover 51, so that the temperature of the frequency converter assembly 50 is reduced.

The two sets of frequency converter assemblies 50 may share one set of frequency converter heat dissipation device, or the metal cover 51 and the third fan 52 may be respectively disposed on each frequency converter assembly 50, so as to improve the heat dissipation efficiency of the frequency converter assembly 50.

When the frequency converter assembly 50 is installed, the metal cover 51 may be enclosed to form a hollow cavity structure, the hollow cavity structure serves as an air duct, a base may also be disposed in the heating furnace 100, the air duct is enclosed with the metal cover 51 through the base, and the third fan 52 is installed at one end of the air duct.

And arranging a fan cover at one end of the metal cover, and installing the third fan 52 at one end of the fan cover far away from the metal cover 51, so that the sectional area of a cavity in the fan cover is gradually increased from the metal cover 51 to the third fan 52.

By using a fan housing with a gradually increasing cross-sectional area, the flow velocity of the air flow in the metal housing 51 is increased, which helps to improve the cooling efficiency of the frequency converter assembly 50.

When the metal cover 51 and the base are installed, the base may be a flat plate structure, a protruding portion is disposed on one side edge of the metal cover 51 facing the base, a jack is disposed on the base, and the protruding portion is inserted into the jack, so that the edge of one end of the metal cover 51 facing the base is attached to the base.

In the heating furnace 100, an air guide cavity is formed between the furnace body 10 and the heating furnace outer shell, the frequency converter heat dissipation device is arranged at one end of the air guide cavity so as to communicate the air guide cavity with the air duct in the metal cover 51, and the heating furnace 100 is provided with heat dissipation holes communicated with the air guide cavity.

The frequency converter heat dissipation device and the secondary air inlet cover 26 can share the secondary air inlet 13, and the secondary air inlet 13 is used as a heat dissipation hole, so that the space utilization rate of the heating furnace 100 is improved conveniently.

The secondary air inlet 13 is arranged on the front panel 14 of the heating furnace 100, and the frequency converter heat dissipation device is arranged on one side of the heating furnace 100 far away from the front panel 14, so that the third fan 52 can be communicated with the rear panel of the heating furnace 100.

The air guide plate 53 is arranged on one side of the furnace body 10 facing the air guide cavity 54, the side of the air guide plate 53, which is far away from the furnace body 10, and the shell of the heating furnace 100 form the air guide cavity 54, and the air guide plate 53 can be used for isolating the heat of the furnace body 10.

One end of the air deflector 53, which is far away from the frequency converter heat dissipation device, is connected with the front panel, and the edge of the air deflector 53, which is close to the front panel, is warped towards the outside of the air guiding cavity 54, so that the sectional area of the end, which is far away from the metal cover 51, of the air guiding cavity 54 is larger than the sectional area of the end, which is close to the metal cover 51, of the air guiding cavity 54.

The two sets of frequency converter assemblies 50 may be respectively provided with the frequency converter heat dissipation structures, or the frequency converter heat dissipation structures may be respectively provided on each of the frequency converter assemblies 50.

An installation plate 55 is arranged on one side of the furnace body 10 facing the air guide cavity 54, the installation plate 55 is arranged at one end of the air guide cavity 54 close to the metal cover 51, and one end of the air guide plate 53 far away from the front panel is connected with the installation plate 55. By arranging the mounting plate 55, the air deflector 53 can be conveniently fixed.

One end of the mounting plate 55, which is far away from the furnace body 10, is bent towards the air guide plate 53 to form an air guide part 56, and a transition structure of the air guide plate 53 and the metal cover 51 is formed through the air guide part 56, so that when air flow is conveyed to the metal cover 51 along the air guide plate 53, the air flow can gradually transition to the metal cover 51.

With continuing reference to fig. 2 and fig. 3, in order to further improve the heating uniformity, in an embodiment of the present invention, a pressurizing cavity 30 and a fan cavity 40 are disposed outside the furnace body 10, a jet plate 31 is disposed between the furnace body 10 and the pressurizing cavity 30, and jet holes 32 are disposed on the jet plate 31; the fan cavity 40 is communicated with the furnace cavity 11 through an air return hole 42, and the fan cavity 40 is communicated with the pressurizing cavity 30 through an air inlet hole 43; a first fan 41 is arranged in the fan cavity 40, the first air draws the air flow into the fan cavity 40 through the air return hole 42, the air flow in the fan cavity 40 is input into the booster cavity 30 through the air inlet hole 43, and the air flow in the booster cavity 30 is injected into the furnace cavity 11 through the jet hole 32. The airflow is continuously circulated among the cavity 11, the blower cavity 40 and the pressurizing cavity 30.

When the magnetron assembly 20 operates, the temperature in the oven cavity 11 will gradually rise, and the first fan 41 operates to draw the hot air flow in the oven cavity 11 into the fan cavity 40, and the hot air flow in the fan cavity 40 is input into the pressure increasing cavity 30, and in the air flow circulation process, the heat in the oven cavity 11 is circularly conveyed, so that the hot air flow can be dispersedly conveyed into the oven cavity 11, and further, the food in the oven cavity 11 is uniformly heated.

Jet holes 32 can be uniformly distributed on the jet plate 31, when air flow enters the fan cavity 40 through the return air holes 42, hot air flow is mixed in the fan cavity 40 and is sent into the pressurizing cavity 30 through the air inlet holes 43 under the action of the first fan 41, after the pressurizing cavity 30 is pressurized, the hot air flow is dispersed and jetted into the furnace cavity 11 through the jet holes 32 on the jet plate 31, and the temperature in the furnace cavity 11 can be uniform through air flow circulation, so that food can be uniformly heated.

When the electric heating device is installed, the electric heating device can be arranged in the furnace chamber 11, heat is generated by the electric heating device, and the heat generated by the electric heating device is circularly brought into the furnace chamber 11 under the action of the fan, so that the uniform heating in the furnace chamber 11 is realized.

Through the arrangement, when food in the oven cavity 11 is heated, uniform heating can be realized, the utilization efficiency of heat can be improved, and the food processing efficiency is higher.

Referring to fig. 3 and 4, fig. 4 is a partially enlarged view of a portion a in fig. 3, a bottom plate 33 is disposed outside the furnace body 10, the pressure increasing cavity 30 is formed between the bottom plate 33 and an outer wall of the furnace body 10, and the jet plate 31 is disposed on a side of the furnace body 10 facing the bottom plate 33, such that the jet plate 31 is disposed between the pressure increasing cavity 30 and the bottom plate 33. The inclined guide plates 34 are arranged on the inner side of the pressure increasing cavity 30, the guide plates 34 and the first fan 41 are respectively arranged at two ends of the pressure increasing cavity 30 in an aligned mode, the guide plates 34 form guide surfaces facing the jet plate 31, and air flow facing the guide plates 34 is reflected towards the jet plate 31 through the guide surfaces. The first fan 41 sends the airflow into the pressure increasing cavity 30, part of the airflow is injected into the furnace cavity 11 through the jet holes 32 on the jet plate 31, part of the airflow is continuously conveyed towards one end far away from the fan, and the airflow is reflected towards the direction of the jet plate 31 under the action of the flow guide surface, so that the airflow can be fully injected into the furnace cavity 11, and meanwhile, the airflow can be prevented from generating turbulent flow in the pressure increasing cavity 30.

The baffle 34 can be detachably connected to the bottom plate 33, the angle between the baffle 34 and the bottom plate 33 can be adjusted, and when the food processor is used, the relative angle of the baffle 34 can be changed according to the processing requirement of food in the furnace cavity 11, so that the direction of the airflow reflected by the baffle 34 to the inside of the furnace cavity 11 can be adjusted, and the airflow can better act on the food in the furnace cavity 11.

In this embodiment, optionally, the pressure increasing cavities 30 are two groups which are arranged outside the furnace body 10 in an aligned manner, and the two groups of pressure increasing cavities 30 are respectively communicated with the fan cavity 40 through the air inlet holes 43. When the first fan 41 is operated, the first fan 41 drives the airflow in the oven cavity 11 to form a circulating system with the two sets of the pressure boosting cavities 30, and the airflow inputted into the oven cavity 11 from the two sets of the pressure boosting cavities 30 can act on the food in the oven cavity 11 from two directions.

A bracket or a baking tray and the like can be arranged in the oven cavity 11 to suspend food in the oven cavity 11, at this time, two sets of the pressurizing cavities 30 run simultaneously, and simultaneously, airflow is input into the oven cavity 11, and heat acts on the food from different directions, so that rapid and uniform heating is realized. Especially when being used for commercial heating furnace 100, the hot gas flow evenly acts on the food surface, and the food surface is colored more evenly, can promote food processing quality greatly.

When two sets of the pressurizing cavities 30 are arranged, the two opposite end surfaces of the furnace cavity 11 are respectively provided with the jet flow plates 31, the outer side of the furnace cavity 11 is provided with two sets of the bottom plates 33, so that the two sets of the bottom plates 33 are respectively arranged at the outer side of the furnace cavity 11 in an aligned manner, the two sets of the bottom plates 33 respectively form the pressurizing cavities 30 with the corresponding jet flow plates 31, the air flow generated by the first fan 41 respectively enters the corresponding pressurizing cavities 30 through the air inlet holes 43, and the air flow enters the furnace cavity 11 through the jet flow holes 32 on the corresponding jet flow plates 31.

In this embodiment, optionally, a heater 44 is disposed in the blower cavity 40, and the airflow is heated by the heater 44 and then input into the pressure increasing cavity 30 through the air inlet hole 43. By arranging the heater 44 in the fan cavity 40, the airflow input into the pressurizing cavity 30 from the fan cavity 40 is heated and is matched with the magnetron component 20, so that the food in the furnace cavity 11 is heated, the heating efficiency can be greatly improved, the heating time is reduced, and the equipment cost is saved. Since the air flow heated by the heater 44 is dispersedly input into the cavity 11, the heating effect is more uniform.

From the booster cavity 30 to the furnace chamber 11 direction, the diameter of efflux hole 32 reduces gradually to when making the air current jet into in the furnace chamber 11 by the efflux hole 32, the velocity of flow of air current increases gradually for the heating effect of air current is better.

The jet flow plate 31 is provided with a protrusion, the middle of the protrusion is provided with a flow guide hole, the flow guide hole and the jet flow hole 32 are coaxially arranged, the protrusion is arranged on one side, facing the furnace chamber 11, of the jet flow plate 31, and the effect of adjusting the air flow conveying direction can be realized by adjusting the angle of one end, far away from the jet flow plate 31, of the protrusion. In order to improve the heating uniformity, the protrusion located in the middle of the jet plate 31 faces the middle of the oven cavity 11, and the protrusion located at the edge of the jet plate 31 faces the direction corresponding to the inner wall of the oven cavity 11, so that the air flow output from the middle of the jet plate 31 is directly conveyed towards the food, the air flow output from the jet holes 32 at the edge of the jet plate 31 is conveyed towards the inner wall of the oven cavity 11, and under the action of the inner wall of the oven cavity 11, the air flow is reflected towards the inner wall of the oven cavity 11 towards the food, so that the hot air flow can fully act on the surface of the food, and the heating uniformity.

Referring to fig. 2, in an embodiment of the present invention, the furnace chamber 11 is provided with an exhaust structure, the exhaust structure includes an exhaust pipe 60 and an exhaust hood 61, the exhaust hood 61 is disposed on the rear panel, which is away from one side of the furnace chamber 11, an exhaust cavity 62 is formed between the exhaust hood 61 and the rear panel, one end of the exhaust pipe 60 is communicated with the inside of the furnace chamber 11, and one end of the exhaust pipe 60, which is away from the furnace chamber 11, is located in the exhaust cavity 62, so that the flue gas in the furnace chamber 11 is conveyed to the exhaust cavity 62 through the exhaust pipe 60.

Referring to fig. 8, fig. 8 is a schematic diagram of an exhaust hood structure according to an embodiment of the present invention, when the inside of the furnace chamber 11 runs, the flue gas generated by the furnace chamber 11 enters the exhaust pipe 60, and after the flue gas enters the inside of the exhaust chamber 62 along the exhaust pipe 60, oil drops in the flue gas are cooled in the inside of the exhaust chamber 62, the oil drops are condensed in the exhaust chamber 62, and a part of the oil drops are attached to the inner wall of the exhaust hood 61, so that the oil drops in the flue gas can be collected by the exhaust hood 61.

Because the exhaust hood 61 sets up the furnace chamber 11 rear panel is outside, make the exhaust hood 61 with the temperature in the exhaust chamber 62 that rear panel 16 formed is less than the temperature in the furnace chamber 11, after the flue gas gets into in the exhaust chamber 62, the oil droplet in the flue gas can produce and condense, and then can avoid the direct output of flue gas to lead to the problem of polluting the outside panel of furnace body.

Optionally in this embodiment, be equipped with gas outlet 64 on the exhaust hood 61, be used for the flue gas in the exhaust chamber 62 is discharged, the flue gas via the blast pipe 60 gets into back in the exhaust chamber 62, the flue gas contact the inner wall of exhaust chamber 62, oil droplet in the flue gas meet the condensation knot, and the oil droplet is concentrated inside the exhaust chamber 62, gaseous via gas outlet 64 output the exhaust chamber 62 is outside. When the exhaust hood 61 is installed, a pipeline can be arranged on the air outlet 64 and is communicated with the outside through the pipeline, oil drops in the flue gas are condensed in the exhaust cavity 62, and the rest airflow is output to the outside along the pipeline.

The plane of the air outlet 64 is vertical to the ground plane, and a guide inclined plane 65 is arranged in the exhaust hood 61; the guide inclined surface 65 and the air outlet 64 are arranged on two side walls of the exhaust hood 61 opposite to each other; the guide slope 65 is inclined so that the sectional area of the exhaust cavity 62 near the rear panel is larger than the sectional area of the exhaust cavity 62 far from the rear panel.

Use the exhaust hood 61 with the cuboid structure of shape rule is formed to the rear panel, an end face of exhaust hood 61 is on a parallel with rear panel place plane, remaining end face perpendicular to rear panel place plane, gas outlet 64 sets up exhaust hood 61 perpendicular to on the planar terminal surface of rear panel place for the flue gas gets into when the exhaust chamber 62, the flue gas is strikeed the exhaust hood 61 is on a parallel with the terminal surface of rear panel, in order to realize the condensation of oil drip in the flue gas, avoid the flue gas directly from being on a parallel with when the terminal surface of rear panel is discharged, the oil drip in the flue gas condenses inadequately, leads to the oil drip directly to be exported by exhaust hood 61 along with the hot gas flow.

Because the plane of gas outlet 64 is perpendicular to the ground level, and then when avoiding the oil droplet in the flue gas to condense, the oil droplet flows to the ground level direction under the action of gravity for the oil droplet can not be in air discharge hood 61 collects concentratedly.

In the flue gas output process, because oil drip in the flue gas can pass through exhaust hood 61 realizes the condensation, and the hot gas flow in the flue gas can be followed gas outlet 64 is exported, and then can avoid the hot gas flow to be in concentrate in the exhaust hood 61 and lead to the interior gas temperature of exhaust chamber 62 increases gradually, influences the problem of oil drip condensation, when realizing making the effect that oil drip condensation concentrates, realizes that the hot gas flow is outer to be arranged.

When the air outlet 64 is provided on the side wall parallel to the rear panel 16, the air outlet 64 and the air outlet pipe 60 are displaced from each other, which can also have an effect of condensing oil droplets in the flue gas, but in the above design, in order to displace the air outlet pipe 60 and the air outlet 64 from each other, the volume of the air discharge cover 61 needs to be increased appropriately; in the scheme, because the oil drops in the flue gas are condensed by the exhaust hood 61, the residual air flow is reflected by the exhaust hood 61 and is output from the air outlet 64, so that the miniaturization design of the exhaust hood 61 can be realized conveniently.

The side wall of the exhaust hood 61 perpendicular to the rear panel may also be enclosed to form other polygonal structures, such as a hexagon and an octagon, and when the exhaust hood 61 is installed on the rear panel 16, the air outlet 64 is always located on the side wall far away from the ground level.

Through setting up the direction inclined plane 65 of slope, the inside volume of exhaust chamber 62 can greatly increased, the air current via after blast pipe 60 exports, can be in under the reflection of direction inclined plane 65 contact many times in the exhaust chamber 62 the exhaust hood 61 inner wall, and then make the oil droplet in the flue gas can realize more abundant condensation, reduce the oil droplet content in the exhaust air current.

The guide slope 65 may be a plane formed by an inclined plate structure provided in the exhaust hood 61, or one sidewall of the exhaust hood 61 may be an inclined structure by which the guide slope 65 is formed.

In order to enable the flue gas to undergo multiple reflections, in this embodiment, optionally, one end of the exhaust pipe 60, which is far away from the furnace chamber 11, is disposed on one side of the exhaust chamber 62, which is close to the guide slope 65, and when the flue gas is output from the exhaust pipe 60, the flue gas directly acts on the guide slope 65 which is in an inclined structure.

The flue gas is followed exhaust pipe 60 exports on the direction inclined plane 65, the flue gas acts on when the direction inclined plane 65 is last under the reflection of direction inclined plane 65, the flue gas is reflected the exhaust hood 61 orientation on the surface of rear panel 16 one side, at this moment, the flue gas process direction inclined plane 65 with twice reflection of exhaust hood 61, route that the flue gas flows and flue gas stagger each other when exporting via exhaust pipe 60, and then avoided the direct air current that the exhaust hood 61 reflects with the air current that exhaust pipe 60 exported produces the problem of hedging.

When the flue gas by during the blast pipe 60 output, because direction inclined plane 65 with gas outlet 64 sets up relatively, blast pipe 60 sets up and is being close to direction inclined plane 65 one side, the flue gas by this moment blast pipe 60 arrives the route of gas outlet 64 increases for the flue gas flows the in-process, and the flue gas passes through simultaneously direction inclined plane 65 with the reflection of exhaust hood 61, the flue gas can be more with each surface contact of exhaust chamber 62 for the oil droplet in the flue gas can be more abundant condensation, reduce by oil droplet content in the gas outlet 64 exhaust flow.

When installing the exhaust hood 61 on the rear panel 16, when installing the exhaust hood 61, in order to avoid the exhaust hood 61 touching the wall or the foreign matter leads to damaging, in an embodiment of the present invention, the exhaust hood 61 deviates from the exhaust chamber 62 side and is provided with an anti-collision part 63. The bump guard 6344 functions to cushion external impact.

The anticollision portion 63 can be for setting up the exhaust hood 61 deviates from the protruding structure of exhaust chamber 62 one side to install the furnace body in the position that is close to the wall as an example, anticollision portion 63 structure can laminate on the wall, and this moment anticollision portion 63 is towards the wall under the effect of anticollision portion 63, the exhaust hood 61 deviates from there is the gap between exhaust chamber 62 one side surface and the wall, and then avoids the easy problem of damaging of exhaust hood 61 direct contact wall body.

The anti-collision part 63 may be made of an elastic material, such as a rubber mat or a metal spring, and when the exhaust hood 61 receives an acting force towards the wall, the rubber mat or the metal spring has an effect of buffering the acting force. The position of the anti-collision part 63 can be set in the middle of the exhaust hood 61, and a plurality of groups of anti-collision parts 63 are uniformly distributed on the surface of one side of the exhaust hood 61, which is far away from the exhaust cavity 62.

In order to facilitate the processing of the collision avoidance portion 63, optionally, a surface of the exhaust hood 61 away from the rear panel 16 may be arched outward of the exhaust chamber 62, and the arch forms the collision avoidance portion 63. The collision prevention part 63 and the exhaust hood 61 form an integrally formed structure to increase stability of the collision prevention part 63.

The end of the exhaust hood 61 far away from the ground level is closed, and the end of the exhaust pipe 60 far away from the furnace cavity 11 is arranged at the middle upper part of the exhaust cavity 62. Because one end of the exhaust hood 61, which is far away from the ground level, is closed, oil drops cannot be directly output from the exhaust hood 61 along with the smoke, and the effect of preventing oil leakage is realized; because the oil drops can contact with the inner wall of the exhaust hood 61, the contact time of the oil drops on the exhaust hood 61 is longer, and the oil drops are favorably condensed.

One end of the exhaust duct 60 near the furnace chamber 11 is disposed at the middle upper portion of the furnace chamber 11. When the furnace chamber 11 runs at a high temperature, the high-temperature flue gas tends to move upwards, and the pressure in the exhaust pipe 60 is far less than the pressure in the furnace chamber 11, so that the flue gas flows outwards along with the exhaust pipe 60, and a better exhaust effect is achieved.

When the exhaust pipe 60 is installed, in order to facilitate the arrangement of elements outside the furnace body, the exhaust pipe 60 is a straight pipe, and the exhaust pipe 60 is arranged in parallel to the ground plane to realize the normal output of the flue gas and prevent oil drops from remaining in the exhaust pipe 60.

The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structure changes made by the contents of the specification and the drawings under the inventive concept of the present invention, or the direct/indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A double-frequency-conversion heating furnace comprises a furnace body, wherein a furnace chamber is formed inside the furnace body, and the double-frequency-conversion heating furnace is characterized in that a magnetron assembly and a frequency converter assembly are arranged outside the furnace body, and the magnetron assembly is used for generating microwaves into the furnace chamber;

2. The dual variable frequency heating furnace according to claim 1, wherein a pressurizing cavity and a fan cavity are arranged outside the furnace body, a jet plate is arranged between the furnace body and the pressurizing cavity, and jet holes are arranged on the jet plate;

3. The dual variable frequency heating furnace according to claim 2, wherein the pressurizing chambers are two groups which are arranged outside the furnace body in an aligned manner, and the two groups of pressurizing chambers are respectively communicated with the fan chamber through air inlet holes.

4. The dual frequency conversion heating furnace according to claim 3, wherein a heater is disposed in the fan chamber, and the air flow heated by the heater is input into the plenum chamber through the air inlet hole.

5. The dual frequency conversion heating furnace according to claim 1, wherein a magnetron heat sink is provided outside the furnace body, the magnetron heat sink corresponding to the magnetron assembly for dissipating heat from the magnetron assembly.

6. The dual-frequency-conversion heating furnace of claim 5, wherein the magnetron heat dissipation device comprises an air guide cover and a second fan, the air guide cover forms a main air duct outside the furnace body, and the magnetron assembly is arranged on the main air duct;

the second fan is used for driving the airflow to flow along the main air duct.

7. The dual variable frequency heating furnace according to claim 6, wherein a main air inlet cover is arranged at one end of the air guide cover, a main air inlet duct is formed in the main air inlet cover, and the main air inlet duct is communicated with the main air duct;

8. The double-frequency-conversion heating furnace according to claim 6, wherein an auxiliary air inlet cover is arranged on the air guide cover, an auxiliary air inlet duct is formed outside the furnace body by the auxiliary air inlet cover, and the auxiliary air inlet duct is communicated with the main air duct;

9. The dual variable frequency heating furnace according to claim 1, wherein a frequency converter heat sink is provided outside the furnace body, the frequency converter heat sink corresponding to the frequency converter assembly for dissipating heat from the frequency converter assembly.

10. The dual variable frequency heating furnace according to any one of claims 1 to 9, wherein the magnetron assembly and the frequency converter assembly are respectively provided at both sides of the furnace body in an aligned manner.