CN105135495B - Microwave heating equipment - Google Patents

Abstract

The invention discloses a microwave heating device, which comprises a furnace body, a drawer door, a driving device and a controller. The furnace body is provided with a door closing detection switch and a door opening detection switch; It is movably installed on the furnace body between the open position of opening the microwave heating chamber and the closing position of closing the microwave heating chamber. When the drawer door is in the open position, the door opening actuation structure touches the door opening detection switch and the door closing actuation structure releases the door closing detection switch. The drawer door When it is in the closed position, the door closing touch structure touches the door closing detection switch and the door opening touch structure releases the door opening detection switch; the drive device is used to drive the drawer door to move between the open position and the closed position; the controller is respectively connected with the door opening detection switch, the door closing detection switch and the drive Device communication. The microwave heating device according to the invention has the advantages of reliable detection of drawer door switch in place, long service life and low cost.

Description

microwave heating device

technical field

The invention relates to the technical field of electrical appliances, in particular to a microwave heating device.

Background technique

The drawer-type microwave oven in the related art uses the following two methods to detect whether the drawer door switch is in place: one is to judge by collecting and calculating the number of pulse signals in the entire stroke, and the other is to judge according to the pulse signals collected within a specific time number to be judged. However, the first method is susceptible to failure due to the influence of the external environment, such as power outages, voltage fluctuations, or external signal interference, resulting in poor reliability of the drawer microwave oven; the second method increases the load on the motor, causing the motor to burn easily damage, short life. In addition, because the above two methods require the motor to collect and feed back pulse signals, the structure of the motor is complicated, and the process requirements and quality requirements of the motor are high, resulting in high cost of the drawer-type microwave oven.

Contents of the invention

The present invention aims to solve at least one of the technical problems existing in the prior art. Therefore, the present invention needs to provide a microwave heating device, which has the advantages of reliable detection of drawer door opening and closing, long service life and low cost.

The microwave heating device according to the embodiment of the present invention includes: a furnace body, the furnace body has a microwave heating chamber inside, the furnace body is provided with a door closing detection switch and a door opening detection switch; a drawer door, the drawer door is provided with a door opening trigger Structure and door closing actuating structure, the drawer door is movably installed on the furnace body between the open position for opening the microwave heating chamber and the closed position for closing the microwave heating chamber, the drawer door is located at the opening position, the door opening actuating structure touches the door opening detection switch and the door closing actuating structure releases the door closing detection switch; when the drawer door is in the closed position, the door closing actuating structure touches the door closing detection switch and the The door opening trigger structure releases the door opening detection switch; a driving device for driving the drawer door to move between the open position and the closed position, the drive device is installed in the furnace body and the drawer door One of them is connected to the other transmission; the controller communicates with the door opening detection switch, the door closing detection switch and the driving device respectively.

The microwave heating device according to the embodiment of the present invention can automatically detect the position of the drawer door with high detection accuracy, realizes the automatic opening or closing of the drawer door, and has high working reliability. In addition, since there is no need to use a motor to collect pulse signals, a motor with a simple structure and low cost can be used without increasing the load on the motor, thereby simplifying the structure of the microwave heating device, reducing production costs and improving the service life.

According to some embodiments of the present invention, a guide rail is provided on the furnace body and a guide rail connecting plate is provided on the drawer door, and the guide rail connecting plate is movably fitted on the guide rail.

Optionally, the door-opening actuating structure is a limit block provided on the connecting plate of the guide rail, and the door-closing actuating structure is a door hook provided on the drawer door.

Further, an interlocking bracket is provided on the furnace body, and the door opening detection switch and the door closing detection switch are installed on the interlocking bracket, wherein when the drawer door is in the closed position, the door hook Hanging on the interlocking bracket, when the drawer door is in the open position, the limiting block is stopped by the interlocking bracket.

According to some embodiments of the present invention, the door closing detection switch includes a monitoring switch, a primary switch, and a secondary switch that communicate with the controller respectively, and when the drawer door is in the closed position, the door closing actuating structure respectively triggers the The monitoring switch, the primary switch and the secondary switch, and the door closing actuating structure respectively releases the monitoring switch, the primary switch and the secondary switch when the drawer door is in the open position.

In a further embodiment of the present invention, there are two primary switches, the monitoring switch and one primary switch are arranged on the left part of the furnace body, and the secondary switch and the other primary switch are arranged On the right part of the furnace body, there are two door-closing actuating structures respectively arranged on the left part and the right part of the drawer door, wherein when the drawer door is in the closed position, the The door-closing actuating structure on the left touches the monitoring switch and the one primary switch respectively, and the door-closing actuating structure on the right of the drawer door respectively touches the secondary switch and the other primary switch; In the open position, the door closing actuating structure located on the left of the drawer door respectively releases the monitoring switch and the primary switch, and the door closing actuating structure located on the right of the drawer door releases the secondary switch and the primary switch respectively. described another primary switch.

Optionally, both the monitoring switch and the one primary switch are arranged horizontally, and the one primary switch is located below the monitoring switch; the secondary switch is arranged vertically, and the other primary switch is arranged horizontally and located below the secondary switch described above.

In an optional embodiment of the present invention, the monitoring switch, the primary switch, the secondary switch and the door opening detection switch are all micro switches.

According to an embodiment of the present invention, the driving device includes: a motor, the motor is installed on the furnace body, the controller communicates with the motor; a pusher, the pusher is respectively connected to the motor It is connected with the drawer door and converts the rotary motion of the motor into the linear motion of the drawer door.

Further, the pusher includes: a driving pulley and a driven pulley, the driving pulley and the driven pulley are respectively rotatably installed on the furnace body, the motor and the driving belt Wheel drive connection; push rod transmission belt, the push rod transmission belt is sleeved on the driving pulley and the driven pulley, and the motor drives the driving pulley to rotate to drive the push rod transmission belt to move; push The push rod is respectively connected with the push rod transmission belt and the drawer, and the push rod linearly moves under the drive of the push rod transmission belt to drive the drawer door in the open position and the closed position to move between.

Optionally, the driving device further includes a variable speed transmission assembly, and the motor is in transmission connection with the driving pulley through the variable speed transmission assembly.

Further, the speed change transmission assembly includes: a motor pulley, the motor pulley is in transmission connection with the motor; a speed change pulley, the speed change pulley is in transmission connection with the driving pulley; a speed change transmission belt, the speed change The transmission belt is sheathed on the motor pulley and the speed change pulley, and the speed change transmission belt drives the speed change pulley to rotate under the drive of the motor pulley.

Additional aspects and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.

Description of drawings

Fig. 1 is a perspective view of a microwave heating device according to an embodiment of the present invention;

2 is a perspective view of a microwave heating device according to an embodiment of the present invention;

Fig. 3 is an enlarged schematic view of part A circled in Fig. 2;

Fig. 4 is a schematic diagram of the drawer door of the microwave heating device in the closed position according to the embodiment of the present invention;

Figure 5 is an enlarged schematic view of part B circled in Figure 4;

Fig. 6 is a schematic diagram of the drawer door of the microwave heating device according to an embodiment of the present invention when it is in an open position;

Figure 7 is an enlarged schematic view of part C circled in Figure 6;

Fig. 8 is a schematic structural diagram of a driving device of a microwave heating device according to an embodiment of the present invention;

Fig. 9 is an exploded view of a driving device of a microwave heating device according to an embodiment of the present invention.

Reference signs:

microwave heating device 100,

Furnace body 1, microwave heating cavity 10, door closing detection switch 15, monitoring switch 111, primary switch 112, secondary switch 113, door opening detection switch 12, guide rail 13, interlocking bracket 14,

Drawer door 2, door opening touch structure 21, door closing touch structure 22, guide rail connecting plate 23, control panel 24,

Driving device 3, motor 31, push rod device 32, push rod 321, driving pulley 322, driven pulley 323, push rod transmission belt 324, variable speed transmission assembly 33, motor pulley 331, variable speed pulley 332, variable speed transmission belt 333 ,

transformer 41, capacitor 42, controller 43,

Microwave launcher 5, waveguide 6, fan assembly 7.

detailed description

Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

The following describes a microwave heating device 100 according to an embodiment of the present invention with reference to FIGS. low merit.

Specifically, the microwave heating device 100 may be a microwave oven or a microwave oven embedded in a wall or cabinet.

As shown in FIGS. 1-9 , a microwave heating device 100 according to an embodiment of the present invention includes a furnace body 1 , a drawer door 2 , a driving device 3 and a controller 43 .

There is a microwave heating cavity 10 inside the furnace body 1, and food is heated in the microwave heating cavity 10. The furnace body 1 is provided with a door closing detection switch 15 and a door opening detection switch 12. The drawer door 2 is provided with a door opening touch structure 21 and a door closing touch structure 22. The drawer door 2 is in the open position of opening the microwave heating chamber 10 and closing the microwave heating chamber 10. It is movably installed on the furnace body 1 between closed positions, so that users can conveniently put food into the microwave heating cavity 10 for heating, or take out food from the microwave heating cavity 10 . For example, after food is put into the drawer, the drawer door 2 is moved backward in the open position as shown in Figure 2 until the drawer door 2 moves to the closed position as shown in Figure 4, and the drawer door 2 completely closes the microwave heating cavity 10 , at this time, the microwave heating device 100 can heat the food; after the food is heated, the drawer door 2 is moved forward in the closed position as shown in the figure until the drawer door 2 moves to the open position as shown in Figure 2, and the microwave The heating chamber 10 is opened to the maximum extent, at which point the food can be taken out.

As shown in Figures 6-7, when the drawer door 2 is in the open position, the door opening actuation structure 21 touches the door opening detection switch 12, and the door closing actuation structure 22 releases the door closing detection switch 15, so that the position of the drawer door 2 in the open position can be is detected, and the accuracy of the detected position of the drawer door 2 is high. As shown in Figures 4-5, when the drawer door 2 is in the closed position, the door closing actuation structure 22 touches the door closing detection switch 15, and the door opening actuation structure 21 releases the door opening detection switch 12, so that the position of the drawer door 2 in the closed position can be determined. detected, and the accuracy of the detected position of the drawer door 2 is high.

The driving device 3 is used to drive the drawer door 2 to move between the open position and the closed position. The driving device 3 is installed on one of the furnace body 1 and the drawer door 2 and is connected to the other transmission, so that the driving device 3 is supported, The movement of the drawer door 2 can thus be driven. For example, as shown in FIG. 2 , the driving device 3 is installed at the bottom of the furnace body 1 , and the driving device 3 is connected to the drawer door 2 in transmission, and the drawer door 2 can move back and forth under the driving of the driving device 3 . Certainly, the driving device 3 can also be arranged on the drawer door 2 and connected with the furnace body 1 through transmission. It should be noted that the driving device 3 is connected to the other transmission among the furnace body 1 and the drawer door 2 , at least including the situation that the driving device 3 can generate relative motion between the furnace body 1 and the drawer door 2 .

The controller 43 communicates with the door-opening detection switch 12 , the door-closing detection switch 15 and the driving device 3 respectively, so as to realize the automatic opening or closing of the drawer door 2 .

The working process of the microwave heating device 100 according to the embodiment of the present invention will be described in detail below with reference to the accompanying drawings, taking the drawer door 2 at the closed position as an example. It can be understood that at this time, the door opening trigger structure 21 releases the door opening detection switch 12 .

When food needs to be heated, the controller 43 communicates with the driving device 3 and makes the driving device 3 drive the drawer door 2 to move forward. The drawer door 2 gradually opens the microwave heating chamber 10 during the forward movement. When the drawer door 2 moves to When the open position is shown in Figure 2 and Figure 6, the microwave heating cavity 10 is opened to the greatest extent, the door opening actuation structure 21 touches the door opening detection switch 12, and the door closing actuation structure 22 releases the door closing detection switch 15, and the driving device 3 stops working like this , the user can put food into the drawer. Afterwards, the controller 43 communicates with the driving device 3 and makes the driving device 3 drive the drawer door 2 to move backward. The drawer door 2 gradually closes the microwave heating cavity 10 during the backward movement. When the drawer door 2 moves to the position shown in FIG. When the closed position shown, the microwave heating chamber 10 is completely closed, the door closing touch structure 22 touches the door closing detection switch 15, and the door opening touch structure 21 releases the door opening detection switch 12, so that the driving device 3 stops working, and the microwave heating device 100 can The food is heated. It can be understood that after the food is heated, the above-mentioned steps can be repeated to take out the food and then close the drawer door 2 .

According to the microwave heating device 100 of the embodiment of the present invention, when the drawer door 2 is in the open position, the door opening actuation structure 21 is used to trigger the door opening detection switch 12 and the door closing actuation structure 22 is used to release the door closing detection switch 15. When the drawer door 2 is in the closed position, the door closing actuation structure 22 Touch the door closing detection switch 15 and the door opening touch structure 21 releases the door opening detection switch 12, can automatically detect the position of the drawer door 2, and the detection accuracy is high, thereby realizing the automatic opening or closing of the drawer door 2, adopting mechanical detection, subject to The influence of external factors is small, and the work reliability is high. In addition, since there is no need to use the drive device 3 to collect pulse signals, a drive device 3 with a simple structure and low cost can be used without increasing the load on the drive device 3, thereby simplifying the structure of the microwave heating device 100, reducing production costs, and improving service life.

As shown in Figure 2 and Figure 6, according to some embodiments of the present invention, guide rails 13 can be provided on the left and right sides of the furnace body 1, and guide rail connecting plates 23 can be provided on the left and right sides of the drawer door 2, and the guide rail connecting plates 23 can be moved. Fittingly on the guide rail 13, the drawer door 2 can move smoothly in the front-back direction like this.

Optionally, as shown in Fig. 2, Fig. 4 and Fig. 5-Fig. door hook. Wherein the limit block can be positioned at the rear end of the guide rail connecting plate 23, so that the drawer can be moved out of the microwave heating chamber 10 to a large extent, and it is more convenient for the user to take and place food, and it can ensure that the drawer door 2 is stably supported when the opening space is large enough On the guide rail 13, the service life of the drawers 2 and the guide rail 13 is effectively extended. The door hook extends backward from the drawer door 2 , so that the microwave heating device 100 can accurately detect the position of the drawer door 2 when the microwave heating cavity 10 is completely closed.

Further, as shown in Fig. 2-Fig. 7, an interlock bracket 14 may be provided on the furnace body 1, and the door opening detection switch 12 and the door closing detection switch 15 are installed on the interlock bracket 14, wherein, as shown in Fig. 4-Fig. 5 Shown, when the drawer door 2 is in the closed position, the door hook is hooked on the interlock bracket 14, so that the door hook can not break away from the door closing detection switch 15, and the position of the drawer door 2 is stable. As shown in FIGS. 6-7 , when the drawer door 2 is in the open position, the stop block is stopped by the interlock bracket 14 , so that the drawer door 2 can be prevented from falling off, and the stop block can touch the door opening detection switch 12 . Optionally, as shown in the accompanying drawings, the door hook can be generally "L" shaped, which is beneficial for the door hook to be securely hooked on the interlocking bracket 14 .

In the embodiment shown in FIGS. 2-5 , the door closing detection switch 15 may include a monitoring switch 111, a primary switch 112 and a secondary switch 113 communicating with the controller 43 respectively, and the door closing actuating structure when the drawer door 2 is in the closed position 22 respectively touches the monitoring switch 111, the primary switch 112 and the secondary switch 113. At this time, the controller 43 communicates with the driving device 3 so that the driving device 3 stops working. The primary switch 112 and the secondary switch 113 avoid affecting the communication between the controller 43 and the driving device 3 and improve the safety of the electric control.

In a further embodiment of the present invention, there can be two primary switches 112, the monitoring switch 111 and one primary switch 112 are arranged on the left part of the furnace shaft 1, and the secondary switch 113 and another primary switch 112 are arranged on the left side of the furnace shaft 1. On the right side, there are two door-closing actuating structures 22 and they are respectively arranged on the left and right parts of the drawer door 2, wherein, when the drawer door 2 is in the closed position, the closing actuating structures 22 on the left side of the drawer door 2 respectively touch the monitoring switch 111 And the above-mentioned primary switch 112, the door-closing actuating structure 22 located on the right of the drawer door 2 touches the secondary switch 113 and the above-mentioned another primary switch 112 respectively, when the drawer door 2 is in the open position, the closing actuating structure located on the left of the drawer door 2 22 releases the monitoring switch 111 and a primary switch 112 respectively, and the door closing actuating structure 22 located on the right of the drawer door 2 releases the secondary switch 113 and the other primary switch 112 respectively. Thereby, the communication reliability of the controller 43 and the detection accuracy of the position of the drawer door 2 are improved.

That is to say, as shown in the drawings, the left side of the furnace body 1 is provided with a monitoring switch 111 and a primary switch 112, the right side of the furnace body 1 is provided with a secondary switch 113 and a primary switch 112, and the left and right sides of the drawer door 2 are respectively There is a door hook, when the drawer door 2 is in the closed position, the door hook on the left side of the drawer door 2 touches the monitoring switch 111, and touches the primary switch 112 on the left side of the furnace body 1, and the door hook on the right side of the drawer door 2 touches the second time. level switch 113, and touch the primary switch 112 on the right side of the furnace body 1, when the drawer door 2 is in the open position, the door hook on the left side of the drawer door 2 releases the monitoring switch 111, and releases the primary switch 112 on the left side of the furnace body 1, The door hook on the right side of the drawer door 2 releases the secondary switch 113 and releases the primary switch 112 on the right side of the shaft 1 .

Optionally, as shown in FIGS. 2-7 , the monitoring switch 111 and the primary switch 112 on the left side of the furnace body 1 are arranged horizontally, and the primary switch 112 on the left side of the furnace body 1 is located below the monitoring switch 111 . The secondary switch 113 is arranged vertically, and the primary switch 112 on the right side of the furnace body 1 is arranged horizontally and below the secondary switch 113 . Preferably, the monitoring switch 111 , the primary switch 112 , the secondary switch 113 and the door opening detection switch 12 can all be micro switches, so that the control of the microwave heating device 100 is simple and the response is quick.

As shown in Figure 2, according to an embodiment of the present invention, the driving device 3 can include a motor 31 and a pusher 32, wherein the motor 31 is installed at the bottom of the furnace shaft 1, and the controller 43 communicates with the motor 31, so that when it needs to open Or when closing the drawer door 2, the controller 43 can control the motor 31 to rotate forward or reversely. The pusher 32 is connected with the motor 31 and the drawer door 2 respectively, and the pusher 32 converts the rotary motion of the motor 31 into the linear motion of the drawer door 2 . Thus, when the drawer door 2 needs to be opened, the controller 43 communicates with the motor 31 and rotates the motor 31, and under the action of the pusher 32, the rotational motion of the motor 31 is converted into the forward movement of the drawer door 2, so that the drawer door 2 is opened, when the drawer door 2 needs to be closed, the rotary motion of the motor 31 is converted into the backward movement of the drawer door 2 under the action of the pusher 32, so that the drawer door 2 is closed.

Further, as shown in FIG. 2 and FIG. 9 , the pusher 32 may include a driving pulley 322 , a driven pulley 323 , a pusher driving belt 324 and a pusher 321 . Wherein, the driving pulley 322 and the driven pulley 323 are respectively rotatably installed on the furnace shaft 1, the motor 31 is connected to the driving pulley 322, and the push rod transmission belt 324 is sleeved on the driving pulley 322 and the driven pulley 323. Above, the motor 31 drives the driving pulley 322 to rotate to drive the push rod transmission belt 324 to move, so that the push rod transmission belt 324 drives the driven pulley 323 to rotate. The push rod 321 is connected with the push rod driving belt 324 and the drawer door 2 respectively, and the push rod 321 linearly moves under the drive of the push rod driving belt 324 to drive the drawer door 2 to move between the open position and the closed position.

Optionally, as shown in FIGS. 8 and 9 , the driving device 3 can also include a variable speed transmission assembly 33, and the motor 31 is connected to the driving pulley 322 through the variable speed transmission assembly 33, so that the rotation of the motor 31 can pass through the variable speed transmission assembly 33. The rotation speed of the driving pulley 322 can be changed, thereby adjusting the moving speed of the drawer door 2 .

Further, as shown in Fig. 8 and Fig. 9, the variable speed transmission assembly 33 may include a motor pulley 331, a variable speed pulley 332 and a variable speed transmission belt 333, the motor pulley 331 is connected to the motor 31, and the variable speed pulley 332 is connected to the driving pulley 322 transmission connections, variable speed transmission belt 333 is set on motor pulley 331 and variable speed pulley 332, motor 31 drives motor pulley 331 to rotate like this, variable speed transmission belt 333 drives variable speed pulley 332 to rotate under the drive of motor pulley 331, thereby The speed change pulley 332 drives the driving pulley 322 to rotate. By setting the size ratio of the motor pulley 331 and the speed change pulley 332, variable speed transmission is realized.

The microwave heating device 100 according to a specific embodiment of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the following description is only an illustration and should not be construed as a limitation of the present invention.

As shown in FIGS. 1-9 , a microwave heating device 100 according to an embodiment of the present invention includes a furnace body 1 , a drawer door 2 , a driving device 3 and a controller 43 .

Specifically, there is a microwave heating chamber 10 inside the furnace body 1 . A microwave transmitter 5 , a transformer 41 , a capacitor 42 and a fan assembly 7 are arranged on the rear side of the furnace body 1 . The transformer 41 and capacitor 42 are suitable for supporting the microwave transmitter 5 . The top of the furnace body 1 is provided with a waveguide 6 for introducing microwaves into the microwave heating cavity 10 . The left and right sides of furnace body 1 are respectively provided with interlock brackets 14, door closing detection switch 15 and door opening detection switch 12 are installed on the interlocking bracket 14 and are all micro switches, wherein door closing detection switch 15 includes monitoring switch 111, primary switch 112 and secondary switch 113, the interlock bracket 14 on the left side is provided with the supervisory switch 111 and the primary switch 112 that are arranged horizontally, the primary switch 112 is located at the bottom of the monitoring switch 111, and the interlocking bracket 14 on the right side is provided with secondary Switch 113 , primary switch 112 and door opening detection switch 12 , secondary switch 113 is arranged vertically, primary switch 112 is horizontally arranged below secondary switch 113 and above door opening detection switch 12 .

The drawer door 2 is set in the microwave heating cavity 10 so as to move back and forth. A guide rail 13 is respectively fixed on the left and right sides of the furnace body 1. Correspondingly, a guide rail connecting plate 23 is respectively provided on the left and right sides of the drawer door 2 to cooperate with the guide rail. 13, so as to reach the sliding effect of supporting the drawer door 2, meanwhile, the rear end of the drawer door 2 is also fixed with rollers, so that the drawer door 2 slides easily. The front end of the drawer door 2 is provided with a control panel 24, and the control panel 24 is provided with buttons for controlling the working conditions of the microwave heating device 100. The drawer door 2 is provided with a door-opening touch structure 21 and a door-closing touch structure 22, the door-opening touch structure 21 is a limit block located at the rear end of the left side guide rail connecting plate 23, and the door-closing touch structure 22 is two left and right sides located on the rear surface of the drawer door 2. Side door hook.

The bottom of furnace body 1 is equipped with driving device 3, and driving device 3 comprises motor 31 and push rod device 32, and push rod device 32 can convert the rotary motion of motor 31 into the forward and backward movement of push rod 321, like this, push rod device 32 is moved by The motor 31 drives, and the push rod 321 is connected with the drawer door 2, so that the user only needs to press the corresponding "open" or "close" button on the control panel 24 to control the opening and closing of the drawer door 2. The controller 43 is a computer board positioned at the rear side of the furnace body 1 , and the controller 43 communicates with the door opening detection switch 12 , the door closing detection switch 15 and the driving device 3 respectively.

The drawer door 2 is provided with a door hook, and when the drawer door 2 was closed, the door hook fastened the interlocking support 14, and now the machine could cook food.

When the microwave heating device 100 is working, the user presses the "open" button on the control panel 24, and the controller 43 will send a signal to control the forward rotation of the motor 31 after receiving the instruction, and the rotation of the motor 31 is converted into a push rod by the push rod device 32. 321 moves forward, thereby opening the drawer door 2. When the drawer door 2 is opened to the set maximum stroke, the limit block will press the door-opening detection switch 12, at this time the door-opening detection switch 12 feeds back a signal, and the controller 43 judges that the drawer door 2 is opened in place, so that the driving device 3 stops working , the drawer door 2 stops moving. After the user puts food into the drawer door 2, presses the "close" button on the control panel 24, the controller 43 will send a signal to control the motor 31 to reverse, and the pusher 32 will control the push rod 321 to move backward , control drawer door 2 to close. After the drawer door 2 is closed, the door hooks on the left and right sides touch the monitoring switch 111, the primary switch 112 and the secondary switch 113 on the interlocking bracket 14, and the monitoring switch 111, the primary switch 112 and the secondary switch 113 feedback signals to The controller 43, the controller 43 judges that the drawer door 2 is closed in place, so that the driving device 3 stops working, and the drawer door 2 stops moving. At this time, the user can select the corresponding cooking function according to his own requirements.

According to the microwave heating device 100 of the embodiment of the present invention, the position of the drawer door 2 is determined by mechanical positioning, and the drawer door 2 is automatically opened or closed. The operation is reliable, the structure is simple, the cost is low, and the service life is long.

In describing the present invention, it is to be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying the referred device Or elements must have a certain orientation, be constructed and operate in a certain orientation, and thus should not be construed as limiting the invention.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

In the description of this specification, reference to the terms "one embodiment", "some embodiments", "further embodiments", "alternative embodiments", "specific embodiments" etc. means that the A particular feature, structure, material, or characteristic is included in at least one embodiment of the invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments.

Although the embodiments of the present invention have been shown and described, those skilled in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the invention is defined by the claims and their equivalents.

Claims (11)

1. A microwave heating device, characterized in that, comprising: A furnace body, the furnace body has a microwave heating chamber inside, and the furnace body is provided with a door closing detection switch and a door opening detection switch; A drawer door, the drawer door is provided with a door-opening touch structure and a door-closing touch structure, and the drawer door is movably installed on the microwave heating cavity between an open position and a closed position. On the furnace body, when the drawer door is in the open position, the door opening actuating structure touches the door opening detection switch and the door closing actuating structure releases the door closing detection switch, when the drawer door is in the closing position, the The door-closing actuating structure triggers the door-closing detection switch and the door-opening actuating structure releases the door-opening detection switch; a drive device for driving the drawer door to move between the open position and the closed position, the drive device is mounted on one of the furnace body and the drawer door and is connected to the other in transmission; a controller, the controller communicates with the door opening detection switch, the door closing detection switch and the driving device respectively, The door closing detection switch includes a monitoring switch, a primary switch, and a secondary switch that communicate with the controller respectively. When the drawer door is in the closed position, the door closing actuating structure respectively touches the monitoring switch, the primary switch and the secondary switch, when the drawer door is in the open position, the door closing actuating structure releases the monitor switch, the primary switch and the secondary switch respectively. 2. The microwave heating device according to claim 1, wherein a guide rail is provided on the furnace body and a guide rail connecting plate is provided on the drawer door, and the guide rail connecting plate is movably fitted on the guide rail . 3. The microwave heating device according to claim 2, characterized in that, the door-opening actuating structure is a limit block arranged on the connecting plate of the guide rail, and the door-closing actuating structure is a stopper arranged on the drawer door. door hook. 4. The microwave heating device according to claim 3, wherein an interlocking bracket is provided on the furnace body, and the door opening detection switch and the door closing detection switch are installed on the interlocking bracket, wherein the When the drawer door is in the closed position, the door hook is hooked on the interlock bracket, and when the drawer door is in the open position, the limit block is stopped by the interlock bracket. 5. The microwave heating device according to claim 1, characterized in that there are two primary switches, the monitoring switch and one primary switch are arranged on the left part of the furnace body, and the secondary switch and the other primary switch are arranged on the right part of the furnace body, and there are two door closing actuating structures respectively arranged on the left part and the right part of the drawer door, wherein, When the drawer door is at the closed position, the door-closing actuating structure located on the left of the drawer door respectively touches the monitoring switch and the one primary switch, and the door-closing actuating structure located on the right of the drawer door respectively touches the a secondary switch and said other primary switch; When the drawer door is at the open position, the door-closing actuating structure on the left of the drawer door releases the monitoring switch and the primary switch respectively, and the door-closing actuating structure on the right of the drawer door respectively releases the secondary switch and the other primary switch. 6. The microwave heating device according to claim 5, characterized in that, both the monitoring switch and the one primary switch are arranged horizontally and the one primary switch is located below the monitoring switch; The secondary switch is arranged vertically, and the other primary switch is arranged horizontally and below the secondary switch. 7. The microwave heating device according to claim 1, wherein the monitoring switch, the primary switch, the secondary switch and the door opening detection switch are all micro switches. 8. The microwave heating device according to claim 1, wherein the driving device comprises: a motor, the motor is installed on the furnace body, and the controller communicates with the motor; A pusher, the pusher is respectively connected with the motor and the drawer door and converts the rotational motion of the motor into the linear motion of the drawer door. 9. The microwave heating device according to claim 8, wherein the pusher comprises: a driving pulley and a driven pulley, the driving pulley and the driven pulley are respectively rotatably mounted on the furnace body, and the motor is connected to the driving pulley; A push rod transmission belt, the push rod transmission belt is sleeved on the driving pulley and the driven pulley, and the motor drives the driving pulley to rotate to drive the push rod transmission belt to move; Push rods, the push rods are respectively connected with the push rod transmission belt and the drawer door, and the push rod linearly moves under the drive of the push rod transmission belt to drive the drawer door between the open position and the drawer door. Move between closed positions. 10 . The microwave heating device according to claim 9 , wherein the driving device further comprises a variable speed transmission assembly, and the motor is connected to the driving pulley through the variable speed transmission assembly. 11 . 11. The microwave heating device according to claim 10, wherein the variable speed transmission assembly comprises: a motor pulley, and the motor pulley is connected to the motor; a speed change pulley, and the speed change pulley is connected to the drive pulley; The speed change transmission belt is sleeved on the motor pulley and the speed change pulley, and the speed change transmission belt drives the speed change pulley to rotate under the drive of the motor pulley.