Automatic door lock device and pressure steam oven

Abstract

The present invention provides an automatic door lock device and a pressure steam oven. The automatic door lock device comprises: latches, arranged on the inner side of a door body of the pressure steam oven; engaging parts, arranged on an oven body of the pressure steam oven, wherein when the door body is closed, the engaging parts can be pushed to rotate in a first direction and be engaged into the latches, and when the door body is opened, the engaging parts rotate in a second direction and are disengaged from the latches; elastic parts, arranged on the oven body and used for applying, to the engaging parts, an acting force for enabling the engaging parts to rotate in the first direction and tighten the latches when the door body is closed, and used for applying, to the engaging parts, an acting force for enabling the engaging parts to rotate in the second direction when the door body is opened; and locking parts, arranged on the oven body, wherein the locking parts are used for stopping the engaging parts when the pressure in the oven body reaches a first threshold, so that locks apply, to the latches, a locking acting force towards the interior of the oven body. According to the present invention, primary tensioning and locking can be utilized during pressureless cooking, and secondary tensioning and locking can be added during pressure cooking, so that the use safety is ensured.

Description

Automatic door locking device and pressure steam oven Technical Field

[0001] The invention belongs to the technical field of small household appliances, and in particular relates to an automatic door locking device and a pressure steam oven. Background Art

[0002] With the improvement of living standards, steam ovens are becoming more and more popular. Steam ovens can be used to toast bread, roast meat, steam and bake food, etc., and are deeply loved by consumers. With the advancement of technology and the accelerated pace of life, people have strengthened their control over time and have higher requirements for the taste of cooked food. They are troubled by the long cooking time and poor taste of some foods. Therefore, pressure steam ovens have appeared, which can speed up the cooking speed of food. The existence of pressure improves the taste of cooked food. Food can also be cooked well in a low-pressure environment. Due to the increase in the pressure in the steam oven, many problems have also arisen. To increase the pressure in the steam oven cavity, cavity sealing, cavity pressure increase and pressure reduction have become industry problems. At present, conventional door structures cannot close the door tightly, resulting in steam leakage and the pressure is difficult to meet the requirements. In order to achieve door sealing, some products use double door locks, which are not only complex in structure and costly, but also difficult to assemble, and inconvenient to operate. The user experience of pressure steam ovens is poor, so the pressure steam oven needs to further optimize its structure.

[0003] For example, the Chinese patent with authorization announcement number CN210144465U discloses a pressure steam oven and its door lock device and water supply device. The door lock device includes a handle, a cam, a hinge, a buckle and a lock. The buckle is set on the upper wall of the inner tank. The buckle and the lock are set in a one-to-one correspondence. The rotating handle drives the hinge to move in the horizontal direction through the cam, thereby driving the buckle to move in a circular motion to achieve locking or disengagement between the buckle and the lock. The door body cannot be further tightened and manual operation is required. The door opening operation is complicated and the mechanism is complicated. Summary of the Invention

[0004] In view of the above problems existing in the prior art, an object of the embodiments of the present invention is to provide an automatic door locking device which has a simple structure, is easy to operate, can achieve secondary tightening and reverse locking, and ensures a locking effect.

[0005] The technical solution adopted in the embodiment of the present invention is an automatic door locking device for a pressure steam oven, the automatic door locking device comprising:

[0006] A lock, provided on the inner side of the door of the pressure steam oven;

[0007] a locking component, provided on the housing of the pressure steam oven and capable of rotating relative to the housing, wherein when the door is closed, the locking component can be pushed to rotate in a first direction and be buckled into the lock catch, and when the door is opened, the locking component can be rotated in a second direction opposite to the first direction and be disengaged from the lock catch;

[0008] an elastic component, provided on the box body and acting on the locking component, for applying a force to the locking component to rotate along the first direction so that the locking component tightens the lock catch when the door body is closed, and for applying a force to the locking component to rotate along the second direction so that the locking component rotates and remains in an initial state when the door body is opened;

[0009] A locking component is provided on the box body, and is used to stop the locking component when the pressure in the box body reaches a first threshold value, restricting the locking component from rotating along the second direction, so that the lock head applies a locking force to the lock buckle toward the box body.

[0010] In an optional embodiment, the locking component includes a rotary lever and a lock head mounted on the rotary lever, wherein the rotary lever is rotatably connected to the housing; when the door is closed, the lock head engages the lock catch, and when the door is opened, the lock head disengages from the lock catch; the locking component is configured to activate when the pressure within the housing reaches a first threshold and to stop the rotary lever. The locking component has a reasonable structural arrangement, and by providing the lock head and the rotary lever for driving the lock head to rotate, locking and unlocking the door can be easily achieved.

[0011] In an optional embodiment, the rotary lever includes a rotary connection portion and a first rod and a second rod extending outward from the rotary connection portion. The rotary lever is rotatably connected to the box body via the rotary connection portion. The other end of the first rod forms the lock head, and the other end of the second rod is used to stop the locking component. The structure is simple and reasonable, and the use effect is good.

[0012] In an optional embodiment, the locking component includes a telescopic rod. When the pressure within the housing reaches the first threshold, the telescopic rod extends toward the second rod. In the second rotational direction, the telescopic rod is positioned in front of the second rod, thereby preventing the rotating mechanism from rotating in the second direction. Using a telescopic rod to stop the second rod provides a simple structure and is easy to implement.

[0013] In an optional embodiment, an end portion of the other end of the second rod body is provided with an inclined surface, and the inclined surface can abut against the telescopic rod when it is extended, so that the telescopic rod applies a force to the second rod body through the inclined surface to rotate it toward the first direction, so that the lock head pulls the lock buckle into the box body. When the telescopic rod is extended into place, the telescopic rod passes over the inclined surface and stops on the second rod body. When the steam pressure in the box body pushes the door body outward, it drives the rotating lever to have a tendency to rotate in the second direction, and the second rod body applies pressure to the telescopic rod to reversely lock it.

[0014] In an optional embodiment, the locking component further comprises an electromagnet, which is fixed to the housing and through which the telescopic rod passes. When the electromagnet is powered on or off, the telescopic rod extends toward the rotating mechanism, and when the electromagnet is powered on or off, the telescopic rod retracts. The telescopic rod is controlled by the electromagnet to extend and retract with high precision, thereby improving safety.

[0015] In an optional embodiment, the locking component also includes a motor and a cam provided on the output shaft of the motor and rotating with the output shaft. When the cam rotates, it can push the telescopic rod to extend toward the rotating mechanism, or cancel the push on the telescopic rod so that the telescopic rod can retract and avoid the rotation of the rotating lever.

[0016] In an optional embodiment, the locking component also includes a reset component and a micro switch, one end of the reset component is connected to the box body, and the other end of the reset component is connected to the telescopic rod, and the reset component is used to apply a force to the telescopic rod to reset it to a retracted state; the micro switch is provided on the box body and is electrically connected to the motor, and when the telescopic rod is extended toward the rotating lever into place under the action of the cam, the micro switch can be triggered to stop the motor, and at the same time drive the reset component to stretch to accumulate elastic potential energy.

[0017] In an optional embodiment, the elastic component includes a torsion spring, one end of the torsion spring is provided on the rotating lever, and the other end is provided on the box body.

[0018] An embodiment of the present invention also provides a pressure steam oven comprising a housing and a door. The housing defines a cooking cavity, the housing is provided with an opening communicating with the cooking cavity, and the door is configured to open and close the opening. The pressure steam oven also includes the automatic door locking device of any of the aforementioned embodiments. This pressure steam oven ensures that the door seals the cooking cavity in both pressurized and unpressurized conditions, thereby increasing food cooking speed, enhancing the taste of cooked food, and improving the user experience.

[0019] In an optional embodiment, the pressure steam oven further includes a convection fan device, comprising a convection fan, convection blades, a convection blade cover, and a first sealing ring. The convection fan is fixed to the housing. The convection blade cover is disposed outside the convection blades and is used to separate the convection fan and the convection blade cover. The output shaft of the convection fan passes through the convection blade cover and is connected to the convection blades, and is used to drive the convection blades to rotate. When the convection blades rotate, they are used to drive hot air circulation in the housing. The first sealing ring is sleeved on the output shaft, and one end of the first sealing ring is tightly against the convection blade cover, and the other end is tightly against the housing of the convection fan. The provision of the first sealing ring achieves a sealing effect, preventing steam in the housing from overflowing through the position where the output shaft passes through the convection blade cover.

[0020] In an optional embodiment, the pressure steam oven further includes a second sealing ring comprising an annular main body and at least one folded lip extending outward from the main body. When the lip is multi-folded, the multiple folded lips are sequentially connected to form a Z-shaped bend, with one end of the innermost folded lip connected to the main body, and a reinforcing rib provided on the outermost folded lip. The thickness of the outermost folded lip is thicker than that of the other folded lips. An annular groove is provided around the periphery of the oven opening, and the main body is disposed within the annular groove. Interspaced hollow structures are provided to enable the main body to deform and be fixed within the annular groove. When the door is closed, the outermost folded lip abuts against the inner side of the door. This provides a reasonable structure and a good sealing effect.

[0021] In an optional embodiment, the pressure steam oven further comprises an exhaust pressure relief device, the exhaust pressure relief device comprising a steam valve, an exhaust component, a pressure relief component, an exhaust pipeline, a pressure relief pipeline and a steam inlet pipeline, one end of the exhaust pipeline being connected to the outlet of the steam valve, the other end of the exhaust pipeline being provided with the exhaust component, one end of the steam inlet pipeline being connected to the inlet of the steam valve, the other end of the steam inlet pipeline being connected to one end of the pressure relief pipeline, the other end of the pressure relief pipeline being provided with the pressure relief component, and the steam inlet pipeline being provided with a steam inlet communicating with the housing;

[0022] When the pressure steam oven is not in the pressure cooking mode, the steam valve is disconnected from the power supply and is in an open state, the steam inlet pipe is connected to the steam exhaust pipe, and the steam in the box can be discharged through the steam exhaust component;

[0023] When the pressure steam oven starts the pressure cooking mode, the steam valve is powered on and in a closed state, the steam inlet pipeline is disconnected from the exhaust pipeline, and the steam in the box is discharged through the pressure relief component when the set pressure is reached.

[0024] In an optional embodiment, the pressure steam oven further includes an evaporation device, which is disposed at the bottom of the housing, with an evaporation surface lower than the inner bottom surface of the housing. This facilitates the collection and evaporation of condensed water, thereby enhancing the user experience.

[0025] Compared with the existing technology, the advantages of the embodiments of the present invention are that the automatic door locking device of the present invention can open and close the door normally during pressure-free cooking, and further tighten the door body in addition to the existing locking function during pressure cooking, achieving a secondary tightening and reverse locking, ensuring the door body is sealed. It has a simple structure, low assembly difficulty, convenient operation, and is easy to implement.

[0026] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.

[0027] This disclosure is an overview of various implementations or examples of the technology, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In the drawings, which are not necessarily drawn to scale, like reference numerals may describe similar components in different views. The drawings illustrate various embodiments generally by way of example and not limitation, and together with the description and claims, serve to explain the embodiments of the invention. Where appropriate, like reference numerals are used throughout the drawings to refer to the same or similar parts.

[0029] FIG1 is a schematic diagram of the internal structure of a pressure steam oven according to an embodiment of the present invention.

[0030] FIG2 is a schematic structural diagram of a pressure steam oven in an open door state according to an embodiment of the present invention.

[0031] FIG3 is an enlarged view of portion A in FIG2 .

[0032] FIG4 is a schematic structural diagram of a pressure steam oven in a no-pressure closed state according to an embodiment of the present invention.

[0033] FIG5 is an enlarged view of portion B in FIG4 .

[0034] FIG6 is a schematic structural diagram of the interaction between the telescopic rod and the inclined surface of the second rod body according to an embodiment of the present invention.

[0035] FIG7 is a schematic diagram of a partial structure of the pressure steam oven in a pressure-closed state according to an embodiment of the present invention.

[0036] 8 to 10 are schematic structural diagrams of another form of a locking component in different positions according to an embodiment of the present invention.

[0037] FIG11 is a schematic diagram showing the motion trajectory of the highest point of the cam and the motion trajectory of the end point of the rotating lever according to an embodiment of the present invention.

[0038] FIG12 is a schematic structural diagram of a convection fan device according to an embodiment of the present invention.

[0039] FIG13 is an assembly cross-sectional view of the sealing ring according to an embodiment of the present invention.

[0040] 14 to 16 are schematic structural diagrams of sealing rings according to embodiments of the present invention.

[0041] FIG17 is a schematic structural diagram of a steam exhaust pressure relief device according to an embodiment of the present invention.

[0042] FIG18 is a cooking logic diagram of a pressure steam oven according to an embodiment of the present invention.

[0043] Reference numerals: 1-lock; 2-locking component; 21-rotating lever; 211-rotating connection portion; 212-first rod; 213-second rod; 2131-inclined surface; 22-lock head; 3-elastic component; 4-locking component; 41-telescopic rod; 42-electromagnet; 43-motor; 44-motor bracket; 45-cam; 46-reset component; 47-micro switch; 48-contact; 100-housing; 101-annular groove; 102-rotating shaft; 103-control module; 104-bracket plate; 200-door body; 201-second sealing ring; 2011-main body; 2012-hollow structure; 2013-first lip portion; 2014-second lip portion; 2015-reinforcement rib; 300-Convection fan device; 301-Convection fan; 302-Convection fan blades; 303-Convection fan blade cover; 304-First sealing ring; 401-Steam valve; 402-Exhaust component; 403-Pressure relief component; 404-Exhaust pipeline; 405-Pressure relief pipeline; 406-Steam inlet pipeline; 500-Steam supply device; 501-Steam pipeline; 600-Heating device; 700-Water supply device; 800-Heating device; 900-Evaporation device. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0045] Unless otherwise defined, the technical or scientific terms used in the present invention shall have the usual meanings understood by persons of ordinary skill in the field to which the present invention belongs. The words "first", "second" and similar terms used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects preceding the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0046] In order to keep the following description of the embodiments of the present invention clear and concise, detailed descriptions of known functions and known components are omitted.

[0047] As shown in Figures 1 to 11 , an embodiment of the present invention provides an automatic door locking device for a pressure steam oven. The automatic door locking device mainly includes a lock catch 1 , a locking component 2 , an elastic component 3 , and a locking component 4 .

[0048] As shown in FIG1 and FIG2 , the lock catch 1 is provided on the inner side of the door body 200 of the pressure steam oven.

[0049] As shown in Figures 2 and 4, the locking component 2 is provided on the cabinet 100 of the pressure steam oven and can rotate relative to the cabinet 100. When the door body 200 is closed, the door body 200 can push the locking component 2 to rotate in a first direction so that the locking component 2 can be buckled into the lock buckle 1, thereby locking the door body 200 on the cabinet 100 and realizing the door locking function; when the door body 200 is opened, the locking component 2 can rotate in a second direction opposite to the first direction and disengage from the lock buckle 1, that is, the locking component 2 releases the lock on the lock buckle 1, so that the door body 200 can be opened relative to the cabinet 100.

[0050] As shown in Figures 3, 5 and 7, the elastic component 3 is provided on the box body 100 and acts on the locking component 2. It is used to apply a force to the locking component 2 to rotate it in a first direction when the door body 200 is closed so that the locking component 2 tightens the lock 1, and to apply a force to the locking component 2 to rotate it in a second direction when the door body 200 is opened so that the locking component 2 rotates to the initial position and remains in the initial state.

[0051] As shown in Figures 2 and 4, the locking component 4 is provided on the box body 100. The locking component 4 is used to start when the pressure in the box body 100 reaches a first threshold, and to stop the locking component 2, restricting the locking component 2 from rotating in the second direction, so that the lock head 22 applies a locking force to the lock buckle 1 toward the box body 100.

[0052] The automatic door locking device of the embodiment of the present invention can not only lock the door once when the pressure steam oven is operated without pressure, but also lock the door twice when the pressure steam oven is operated with pressure, ensuring that the door body 200 is sealed in both pressurized and non-pressurized conditions in the box body 100.

[0053] When the pressure steam oven is operating without pressure, when the door 200 is closed, the locking component 2 can snap into the lock 1 on the door 200, achieving the door locking function, and the locking component 4 is not activated. When the pressure steam oven is operating with pressure, when the door 200 is closed, the locking component 2 can snap into the lock 1 on the door 200, achieving the one-time door locking function. Due to the steam generated by cooking in the cabinet 100, the pressure in the cabinet 100 gradually rises and reaches a first threshold, which generates a thrust on the door 200, causing the door 200 to tend to open outward. The lock 1 on the door 200 pulls the locking component 2, causing the locking component 2 to tend to rotate in the second direction. At the same time, the locking component 4 is activated and stops the locking component 2, restricting the locking component 2 from rotating in the second direction, achieving a reverse locking effect. The greater the steam pressure in the cabinet 100, the greater the reverse locking force. That is, when the pressure steam oven turns on the pressure cooking mode, the door body 200 is further tightened on the basis of the original door lock to achieve secondary door locking and ensure the sealing of the door body 200.

[0054] In some embodiments, as shown in Figures 3, 5, and 7, the locking component 2 includes a rotating lever 21 and a lock head 22 mounted on the rotating lever 21. The rotating lever 21 is rotatably connected to the housing 100. When the door 200 is closed, the lock head 22 engages the lock catch 1. When the door 200 is opened, the lock head 22 disengages the lock catch 1. The locking component 4 is configured to activate when the pressure within the housing 100 reaches a first threshold and to stop the rotating lever 21. The locking component 2 has a rational structure. By providing the lock head 22 and the rotating lever 21 for driving the lock head 22 to rotate, the door 200 can be easily locked and unlocked.

[0055] The structure of the rotating lever 21 rotatably mounted on the housing 100 is not limited. For example, the rotating lever 21 may be provided with an axial hole, and a rotating shaft 102 may be fixed to the housing 100, through which the rotating lever 21 is mounted. The lock catch 1 on the door body 200 may be a structure protruding from the inner side of the door body 200 and having a buckle hole. When the door body 200 is closed, the lock catch 1 on the door body 200 extends into the housing 100 and pushes the lock head 22 to rotate the rotating lever 21 in a first direction. The lock head 22 then buckles into the buckle hole of the lock catch 1 to lock the door body 200, thereby achieving the door locking function. When the door body 200 is pulled outward, the door body 200 drives the lock catch 1 to move toward the outside of the housing 100. The lock catch 1 simultaneously drives the lock head 22 and the rotating lever 21 to rotate in a second direction. During the rotation, the lock head 22 automatically disengages from the lock catch 1, thereby achieving the door unlocking function. When the pressure steam oven is operated under pressure and the locking component 4 is activated, the locking component 4 stops the rotating lever 21, so that the rotating lever 21 cannot rotate in the second direction, thereby preventing the lock head 22 from escaping from the lock buckle 1, and exerting a force toward the inside of the cabinet 100 on the lock buckle 1 to achieve reverse locking, thereby preventing the door body 200 from opening due to the pressure inside the cabinet 100 during the cooking process.

[0056] In some embodiments, continuing with Figures 3, 5 and 7, the rotating lever 21 includes a rotating connection portion 211 and a first rod body 212 and a second rod body 213 formed by extending outward from the rotating connection portion 211. An axial hole is provided on the rotating connection portion, and the rotating lever 21 is rotatably connected to the rotating shaft 102 on the box body 100 through the rotating connection portion 211. It can be understood that the rotating lever 21 and the lock head 22 both rotate with the rotating shaft 102 as the rotation center. The other end of the first rod body 212 forms the lock head 22, and the other end of the second rod body 213 is used to stop with the locking component 4. The structural design of the rotating lever 21 is reasonable, which facilitates the secondary locking through the cooperation of one rod body with the locking component 4, and the lock head 22 is formed by the other rod body, which simplifies the structure and improves the stability of the structure.

[0057] The angle between the first rod 212 and the second rod 213 is not limited. To ensure that they can interact with the lock buckle 1 and the locking component 4 respectively, and to facilitate the layout of various components, the angle α between the first rod 212 and the second rod 213 can be set to be greater than 90° and less than 180°. The angle α refers to the angle formed by the first rod 212 and the second rod 213 in the first direction.

[0058] As shown in Figures 3, 5, and 7, the first rod 212 can be slightly bent in the second direction as a whole to form a hook-shaped locking head 22, or the other end (free end) of the first rod 212 can be bent into a hook shape to form the locking head 22. The locking head 22 with such a shape is easy to insert into or remove from the lock hole of the lock buckle 1, making locking and unlocking easy.

[0059] In some embodiments, the locking member 4 includes a telescopic rod 41. When the pressure within the housing 100 reaches a first threshold, the telescopic rod 41 extends toward the second rod 213. In the second rotational direction, the telescopic rod 41 is positioned in front of the second rod 213 to prevent the rotating mechanism 21 from rotating in the second direction. Using the telescopic rod 41 to stop the second rod 213 provides a simple structure and convenient implementation.

[0060] In some embodiments, as shown in Figures 3, 5, and 7, the other end of the second rod 213 is provided with an inclined surface 2131. The inclined surface 2131 is configured to initially contact the telescopic rod 41 when the telescopic rod 41 is extended, causing the telescopic rod 41 to exert a force on the second rod 213 via the inclined surface 2131, causing the second rod 213 to rotate in the first direction (see Figure 6), thereby causing the lock head 22 to tighten the lock catch 1 into the housing 100. When the telescopic rod 41 is fully extended (the telescopic rod 41 is fully extended when it reaches its final position and cannot be extended further, at which point the telescopic rod 41 is at its maximum extension length), the telescopic rod 41 passes over the inclined surface 2131 and stops on the second rod 213 (see Figure 7). In this state, when the steam pressure within the housing 100 pushes the door 200 outward, it drives the rotating lever 21 to rotate in the second direction, causing the second rod 213 to apply pressure on the telescopic rod 41 to reverse the locking action.

[0061] When the pressure steam oven is turned on the pressure cooking mode, as shown in Figure 6, when the telescopic rod 41 is just extended, it first acts on the inclined surface 2131 of the second rod body 213, and the inclined surface 2131 applies a force F0, which will be decomposed into a thrust F1 and a force in the direction F2. The thrust F1 pushes the rotating lever 21 and the lock head 22 thereon to rotate around the rotation center to tighten the lock buckle 1, thereby further tightening the door body 200 on the basis of the original door locking, achieving a secondary door locking effect.

[0062] When the telescopic rod 41 reaches the position shown in Figure 7, due to the steam generated by cooking in the box 100, the pressure in the box 100 slowly rises, generating an outward thrust on the door body 200, and the thrust drives the rotating lever 21 to rotate in the second direction through the lock head 22, so that the rotating lever 21 applies a shear force F3 to the telescopic rod 41 through the second rod body 213, as shown in the force direction of F3 in Figure 7, preventing the door body 200 from moving outward, and at the same time increasing the friction between the contact surfaces of the telescopic rod 41 and the second rod body 213, preventing the telescopic rod 41 from retracting in an uncontrolled situation (control failure), thereby achieving an anti-locking effect.

[0063] The extension and retraction of the telescopic rod 41 can be controlled in a variety of ways, such as electrical control, mechanical control, etc. The present invention is not particularly limited to this. As long as the telescopic rod 41 can be controlled to extend and retract toward the second rod 213 when the pressure within the box 100 reaches the first threshold, and the second rod 213 can be stopped to prevent the rotation of the rotatable lever 21 in the second direction, it will be sufficient.

[0064] In some embodiments, as shown in Figures 3, 5, and 7, the locking component 4 further includes an electromagnet 42, which is fixed to the housing 100. The telescopic rod 41 extends through the electromagnet 42. When the electromagnet 42 is powered on or off, the telescopic rod 41 extends toward the rotating mechanism 21. When the electromagnet 42 is powered on or off, the telescopic rod 41 retracts. The electromagnet 42 controls the telescopic rod 41 to extend and retract, with high precision, thereby improving safety.

[0065] Exemplarily, the telescopic rod 41 may include a rod portion, a head portion provided at the protruding end of the rod portion, and a stop portion provided at the tail end of the rod portion. The rod portion is inserted into the electromagnet 42, and the head portion and the stop portion are both located outside the opposite ends of the electromagnet 42. An elastic component 3 is provided between the stop portion and the electromagnet 42, and the elastic component 3 is used to apply a force to the stop portion to move it away from the electromagnet 42. The elastic component 3 can be a spring, which is sleeved on the rod portion, and its two ends respectively abut the stop portion and the end of the electromagnet 42. The stop portion is made of ferromagnetic material. When the electromagnet 42 is energized (powered on), a current is generated in the coil of the electromagnet 42, and the current forms a magnetic field around the coil. The electromagnet 42 attracts the stop portion, and the stop portion drives the entire rod portion and the head portion to move along the axial direction of the rod portion toward the second rod body 213. At the same time, the stop portion pushes the spring, causing the spring to compress and accumulate elastic potential energy. When the electromagnet 42 is powered off (de-energized), the magnetic force of the electromagnet 42 disappears, and the stopper drives the rod portion to move in a direction away from the second rod body 213 under the action of the spring. The telescopic rod 41 is in a state of being retracted into the electromagnet 42, and the head of the electromagnet 42 will not hinder the rotation of the rotating lever 21. See Figure 3. The dotted line in Figure 3 is the maximum rotation path of the rotating lever 21, and the head of the electromagnet 42 is located outside the dotted line; the spring is in a naturally extended state.

[0066] In some embodiments, the elastic component 3 includes a torsion spring, one end of which is provided on the rotary lever 21, and the other end is provided on the box body 100. The torsion spring is always in a compressed state, that is, whether the door body 200 is open and the rotary lever 21 is in the initial state, or the door body 200 is closed and the rotary lever 21 is in the door locking state, the torsion spring always remains in a compressed state.

[0067] When the door is closed, the lock catch 1 on the door body 200 pushes the rotary lever 21 to rotate around the rotation center (rotating axis 102), thereby locking the lock head 22 into the lock catch 1. The presence of the torsion spring allows the lock head 22 to exert a tensioning force on the lock catch 1, thereby locking the door. In other words, the torsion spring and the rotary lever 21 work together to tighten the door body 200 and lock the door. When the door is open, the rotary lever 21 is held in its initial position by the torsion spring.

[0068] In addition to being driven by the electromagnet 42, the telescopic rod 41 can also be driven by the motor 43 and cam 45 as shown in Figures 8 to 11. The motor 43 and cam 45 cooperate with the electromagnet 42 to control the telescopic rod 41, and the movement trajectory of the telescopic rod 41 is consistent. The force between the telescopic rod 41 and the second rod body 213 is consistent.

[0069] Specifically, as shown in Figures 8 to 11, the locking component 2 includes, in addition to the telescopic rod 41, a motor 43 and a cam 45 disposed on the output shaft of the motor 43 and rotating therewith. When the cam 45 rotates, it can push the telescopic rod 41 toward the rotating mechanism 21 to extend, or cancel the push on the telescopic rod 41 to retract the telescopic rod 41 and avoid rotation of the rotating lever 21. The structure of driving the telescopic rod 41 to extend and retract through the cooperation of the motor 43 and the cam 45 is simple and easy to implement.

[0070] The telescopic rod 41 can be mounted on the support plate 104. Specifically, the support plate 104 is provided with a retaining structure for retaining the telescopic rod 41 against the support plate 104. This retaining structure prevents the telescopic rod 41 from separating from the support plate 104, but does not restrict the telescopic rod 41 from extending or retracting along its own axis. The motor 43 is secured to a motor bracket 44, which can be secured to the housing 100.

[0071] In some embodiments, as shown in Figures 8 to 11 , the locking member 4 further includes a reset member 46 and a microswitch 47. One end of the reset member 46 is connected to the housing 100, specifically, the bracket plate 104 on the housing 100, and the other end is connected to the telescopic rod 41. The reset member 46 is used to apply a force to return the telescopic rod 41 to its retracted position. For example, the reset member 46 can be a tension spring. The microswitch 47 is located on the housing 100 and electrically connected to the motor 43. Specifically, the microswitch 47 can be located on the bracket plate 104 of the housing 100 and positioned near the telescopic rod 41. When the telescopic rod 41 extends toward the rotating lever 21 under the action of the cam 45 and stops the second rod 213, the telescopic rod 41 simultaneously triggers the microswitch 47, causing the motor 43 to stop. The extension of the telescopic rod 41 also causes the reset member 46 to stretch, accumulating elastic potential energy. When the telescopic rod 41 is extended into place, it can not only stop the rotating mechanism 21, but also trigger the micro switch 47 at the same time to control the motor 43 to stop rotating, so that the cam 45 remains in the state of pushing the telescopic rod 41. This structural design is ingenious, simplifies the structure and control program, and is more convenient to use.

[0072] When the motor 43 is activated, the cam 45's protruding portion rotates to the corresponding telescopic rod 41, pushing the telescopic rod 41 gradually outward toward the rotating lever 21. When the cam 45 reaches its highest point and pushes against the telescopic rod 41 (see FIG10 ), the telescopic rod 41 extends into position, stopping the second rod 213 of the rotating lever 21. Simultaneously, the telescopic rod 41 contacts the contact 48 of the microswitch 47, triggering the microswitch 47. As shown in FIG11 , the upper dashed line in the figure represents the motion path of the end of the rotating lever 21, i.e., the free end of the second rod 213, while the lower dashed line in the figure represents the motion path of the cam 45 at its highest point. When the cam 45 reaches its highest point and pushes against the telescopic rod 41, the telescopic rod 41 extends into position and stops the second rod 213. When cooking is finished, the motor 43 continues to rotate, or rotates in the opposite direction, and the convex portion of the cam 45 gradually moves away from the telescopic rod 41, and the concave portion of the cam 45 corresponds to the telescopic rod 41. The cam 45 then releases the push on the telescopic rod 41 and does not hinder the rotation of the rotating lever 21 (see Figure 8).

[0073] Illustratively, a microswitch 47 is positioned to the side of the telescopic rod 41, with a contact 48 of the microswitch 47 extending toward the telescopic rod 41. The outer diameter of the telescopic rod 41 gradually increases from the end facing the rotating lever 21 toward the other end, forming an inclined surface on the circumference of the telescopic rod 41. When the telescopic rod 41 is fully extended toward the rotating lever 21, the inclined surface on the telescopic rod 41 contacts the contact 48 of the microswitch 47, triggering the microswitch 47.

[0074] When cooking is finished, the motor 43 is controlled to rotate, and the rotation of the motor 43 drives the cam 45 to rotate. At the same time, the reset component 46 pulls the telescopic rod 41 away from the rotating lever 21 and resets it to the retracted state. At the same time, the telescopic rod 41 releases the trigger on the micro switch 47. The timing starts when the telescopic rod 41 leaves the contact of the micro switch 47. When the telescopic rod 41 returns to the position shown in Figure 8, the motor 43 stops moving.

[0075] Microswitch 47 can be connected in series to the circuit containing motor 43. When telescopic rod 41 triggers microswitch 47, the circuit is closed, energizing motor 43 and driving cam 45. Microswitch 47 can also be electrically connected to the pressure steam oven's control module 103. When triggered, microswitch 47 sends a signal to control module 103, which then stops motor 43. Furthermore, control module 103 can receive pressure signals within housing 100. When the pressure within housing 100 reaches a first threshold, or when a first predetermined time has passed since the pressure steam oven was activated and the pressure within housing 100 reaches the first threshold, control module 103 activates motor 43.

[0076] The working principle of the automatic door locking device of the embodiment of the present invention is as follows:

[0077] When the pressure cooking mode is not turned on, the pressure in the box 100 is normal pressure, the locking component 4 is not activated, the telescopic rod 41 is in a retracted state, and will not block the rotation of the rotating lever 21. The lock head 22 on the rotating lever 21 tightens the door body 200 to lock the door, and the door can be opened and closed normally.

[0078] When the pressure cooking mode is turned on, when the pressure in the box 100 reaches a first threshold, the control module 103 of the pressure steam oven controls the electromagnet 42 to be energized, the telescopic rod 41 is pushed out toward the second rod body 213, and the lock head 22 tightens and locks the door body 200. When cooking is completed and the pressure in the box 100 is released, the control module 103 controls the electromagnet 42 to be de-energized, the telescopic rod 41 is retracted, the restriction on the second rod body 213 is lifted, and the rotary lever 21 can be rotated, and the door can be opened and closed normally.

[0079] An embodiment of the present invention further provides a pressure steam oven. As shown in FIG1 , the pressure steam oven includes a housing 100 and a door 200 . The housing 100 defines a cooking cavity, the housing 100 is provided with an opening communicating with the cooking cavity, and the door 200 is used to open or close the opening. The pressure steam oven also includes the automatic door locking device described in any of the above embodiments.

[0080] The pressure steam oven of the present invention includes the aforementioned automatic door locking device, thus providing a single-pull door locking function during non-pressure cooking. Furthermore, during pressure cooking, in addition to the single-pull door locking function, a secondary pull anti-locking function is added. This ensures that the door 200 seals the cooking chamber 100 in both pressurized and non-pressurized conditions. This improves food cooking speed, enhances the taste of cooked food, and enhances the user experience.

[0081] The other components of the automatic door locking device (locking component 2 and locking component 4) except the lock buckle 1 can be fixed to the inner wall of the box 100 by screws. In order to increase the firmness and avoid damage to the side wall of the box 100, a bracket plate 104 can be set on the inner wall of the box 100, and the automatic door locking device is set on the inner wall of the box 100 through the bracket plate 104.

[0082] The door 200 is connected to the housing 100 via a bottom hinge. The door 200 can rotate around the hinge to open or close the housing 100. As shown in Figure 1, the door 200 can be equipped with two lock catches 1, located at the top of the inner side of the door 200 and spaced apart. Similarly, the housing 100 is equipped with two locking components 2 and two locking components 4 corresponding to the two lock catches 1. This ensures that when the door 200 is closed, it is stably locked to the housing 100.

[0083] In some embodiments, the locking component 4 can be electrically connected to the control module 103 of the pressure steam oven, and the activation of the locking component 4 can be controlled by a program. For example, based on a set cooking time, when a first preset time has passed after the pressure steam oven is started, the pressure in the cooking chamber is considered to have reached a first threshold. The control module 103 then sends an activation signal to the locking component 4, causing the locking component 4 to activate and stop the locking component 2.

[0084] When the locking component 4 includes an electromagnet 42 and a telescopic rod 41, the control module 103 can control the power on and off of the electromagnet 42. When a first preset time has passed after the pressure steam oven is started, or a pressure detection component is set in the cooking cavity, when the detection component detects that the pressure in the cooking cavity reaches a first threshold, the control module 103 controls the switch of the circuit where the electromagnet 42 is located to close, the electromagnet 42 is energized, the telescopic rod 41 is extended, and the second rod body 213 is stopped, thereby limiting the rotation of the rotating lever 21 in the second direction.

[0085] In some embodiments, as shown in Figure 12, the pressure steam oven also includes a convection fan device 300, which includes a convection fan 301, a convection fan blade 302, a convection fan blade cover 303 and a first sealing ring 304. The convection fan 301 is fixed on the box body 100, for example, fixed on the top of the box body 100. The convection fan blade cover 303 is arranged on the outside of the convection fan blade 302 and is used to separate the convection fan 301 and the convection fan blade cover 303. The output shaft of the convection fan 301 passes through the convection fan blade cover 303 and is connected to the convection fan blade 302, which is used to drive the convection fan blade 302 to rotate. When the convection fan blade 302 rotates, it is used to drive the hot air circulation in the box body 100 (cooking cavity). The first sealing ring 304 is sleeved on the output shaft, and one end of the first sealing ring 304 is tightly pressed against the convection fan blade cover 303, and the other end is tightly pressed against the body of the convection fan 301. The two ends of the first sealing ring 304 are respectively interference fit with the convection fan cover 303 and the body of the convection fan 301 (the body here refers to all parts except the output shaft including the casing in a broad sense) to achieve a sealing effect, thereby preventing the steam in the box body 100 from overflowing through the position where the output shaft passes through the convection fan cover 303.

[0086] In some embodiments, as shown in FIG1 , the pressure steam oven further includes a second sealing ring 201, which is disposed on the inner periphery of the door body 200 or the periphery of the box opening of the box body 100, and is used to seal the door body 200 and the box body 100 when the door body 200 is closed, so that the cooking cavity in the box body 100 forms a sealed space of the box body 100, thereby realizing pressure cooking and ensuring the cooking effect.

[0087] Exemplarily, as shown in Figures 13 to 16, the second sealing ring 201 includes an annular main body 2011 and at least one folded lip edge formed by extending outward from the main body 2011. When the lip edge is multi-fold, the multi-folded lip edges are connected in sequence to form a Z-shaped bend, and one end of the innermost folded lip edge is connected to the main body 2011. A reinforcement structure is provided on the outermost folded lip edge, and the reinforcement structure can be in the form of a reinforcing rib 2015. The thickness of the outermost folded lip edge is thicker than that of other folded lip edges; an annular groove 101 is provided on the periphery of the oven opening, and the main body 2011 is provided in the annular groove 101, and is provided with spaced hollow structures 2012 so that the main body 2011 can be deformed and fixed in the annular groove 101; when the door body 200 is closed, the outermost folded lip edge is pressed against the inner side of the door body 200.

[0088] As shown in Figures 14 to 16, the main body 2011 is provided with multiple hollow structures 2012 at intervals, so that it can be squeezed and deformed when inserted into the annular groove 101, so as to be stably fixed in the annular groove 101 (see Figure 13) to avoid falling out and affecting the sealing performance.

[0089] Figures 14 to 16 are schematic diagrams of second sealing rings 201 with different structural forms. The second sealing ring 201 shown in Figure 14 includes two folded lips: a first lip 2013 directly connected to the main body 2011 and a second lip 2014 connected to the first lip 2013. The end of the second lip 2014 not connected to the first lip 2013 forms a free end. A reinforcing rib 2015 is provided on at least one side of the portion of the second lip 2014 near its end to increase the strength of the second lip 2014. Of course, the reinforcing rib 2015 is not limited to being provided only on the portion of the second lip 2014 near its end, and the number of reinforcing ribs 2015 is also not limited. In order to allow the existence of pressure in the cooking cavity in the pressure cooking mode, the second lip portion 2014 of the second sealing ring 201 needs to have a certain strength, so that when there is pressure in the cooking cavity, an extrusion force will be generated on the second lip portion 2014, so that the second lip portion 2014 is close to the inner side of the door body 200 and can withstand a certain pressure, see Figure 13.

[0090] To ensure proper sealing of the door 200 during pressure-free cooking, a thinner first lip 2013 is designed. Specifically, the first lip 2013 is thinner than the second lip 2014. This allows the door 200 to press down the first lip 2013 of the second sealing ring 201 when the door is closed, ensuring a pressure-free seal on the door 200. It will be appreciated that when the second sealing ring 201 includes more than two folded lips, except for the outermost folded lip for sealing against the door 200, all other lips should be designed to be thinner to allow for smooth deformation and compression under the action of the door 200.

[0091] The second sealing ring 201 shown in Figures 15 and 16 has only one folded lip edge, which is the first lip edge 2013. The first lip edge 2013 can be formed by extending in two opposite directions from different positions of the main body 2011. At least one side of the first lip edge 2013 near its end is provided with a reinforcing rib 2015 to increase the strength of the first lip edge 2013. When the door body 200 is closed, the first lip edge 2013 is close to the inner side of the door body 200 and can withstand a certain pressure.

[0092] As shown in Figure 1, the pressure steam oven also includes a steam supply device 500, a heating device 600, a water supply device 700, and a heat dissipation device 800. The steam supply device 500 can selectively provide steam to the cooking chamber as needed to cook food using steam. A steam pipe is connected to the steam supply device 500, and the steam generated by the steam supply device 500 is transported into the housing 100 via the steam pipe. The water supply device 700 supplies water to the steam supply device 500. The heating device 600 is used to heat the cooking chamber to bake food. The heat dissipation device 800 is used to dissipate heat to the control module 103, the convection fan device 300, and the exhaust pressure relief device (described below).

[0093] As shown in Figure 17, the pressure steam oven also includes an exhaust and pressure relief device, which includes a steam valve 401, an exhaust component 402, a pressure relief component 403, an exhaust pipe 404, a pressure relief pipe 405, and a steam inlet pipe 406. One end of the exhaust pipe 404 is connected to the outlet of the steam valve 401, and the other end of the exhaust pipe 404 is provided with the exhaust component 402. The structure of the exhaust component is not limited; for example, it can be an exhaust port to directly discharge steam. One end of the steam inlet pipe 406 is connected to the inlet of the steam valve 401, and the other end of the steam inlet pipe 406 is connected to one end of the pressure relief pipe 405, and the other end of the pressure relief pipe 405 is provided with the pressure relief component 403. The steam inlet pipe 406 is provided with a steam inlet that communicates with the interior of the housing 100.

[0094] When the pressure cooking mode of the pressure steam oven is not turned on, the control module 103 controls the steam valve 401 to disconnect the power supply, the steam valve 401 is in the open state, the steam inlet pipe 406 is connected to the exhaust pipe 404, the steam in the box 100 enters the exhaust pipe and is discharged to the outside through the exhaust component, and the cooking cavity maintains normal pressure cooking.

[0095] When the pressure steam oven turns on the pressure cooking mode, the control module 103 controls the steam valve 401 to turn on the power, the steam valve 401 is in the closed state, the steam inlet pipe 406 and the exhaust pipe 404 are disconnected, and the steam in the box 100 (cooking cavity) can only be discharged through the pressure relief component 403, but the pressure relief component 403 will only start to discharge steam when the pressure in the cooking cavity reaches the set pressure, thereby satisfying the pressure rise in the cooking cavity and realizing pressure cooking.

[0096] As shown in FIG1 , the pressure steam oven further includes an evaporation device 900 , which is located at the bottom of the housing 100 , with the evaporation surface of the evaporation device 900 being lower than the inner bottom surface of the housing 100. When the pressure steam oven is in pressure cooking mode or pressure steaming mode, condensation may be generated. This condensation collects on the evaporation surface of the evaporation device 900 at the bottom of the housing 100 and is evaporated, thus resolving the problem of condensation being difficult to remove from the housing 100 .

[0097] As shown in FIG18 , the pressure steam oven of the embodiment of the present invention includes different cooking modes, including a normal cooking mode, a pressure steaming mode, a pressure baking mode, and a pressure steam-bake mode. The normal cooking mode includes a steaming mode, a baking mode, and a steam-bake mode under normal pressure. The user can select these modes through the control module 103 during use.

[0098] The above description is intended to be illustrative rather than restrictive, and those skilled in the art may make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present disclosure. Furthermore, the above examples (or one or more of them) may be used in combination with each other, and it is contemplated that these embodiments may be combined with each other in various combinations or permutations.

Claims

1. An automatic door lock device for a pressure steam oven, characterized in that: The automatic door locking device comprises: A lock (1) disposed on the inner side of the door (200) of the pressure steam oven; A locking component (2) is arranged on the box body (100) of the pressure steam oven and is rotatable relative to the box body (100); when the door body (200) is closed, the locking component (2) can be pushed to rotate in a first direction and be buckled into the lock buckle (1); when the door body (200) is opened, the locking component (2) can be rotated in a second direction opposite to the first direction and be disengaged from the lock buckle (1); an elastic component (3) disposed on the box body (100) and acting on the locking component (2) for applying a force to the locking component (2) to rotate it in the first direction when the door body (200) is closed so that the locking component (2) tightens the lock buckle (1); and for applying a force to the locking component (2) to rotate it in the second direction when the door body (200) is opened so that the locking component (2) rotates and remains in an initial state; A locking component (4) is arranged on the box body (100), and is used to stop the locking component (2) when the pressure in the box body (100) reaches a first threshold value, thereby limiting the rotation of the locking component (2) along the second direction, so that the lock head (22) applies a locking force on the lock buckle (1) toward the inside of the box body (100).

2. The automatic door locking device according to claim 1, characterized in that: The locking component (2) comprises a rotating lever (21) and a lock head (22) arranged on the rotating lever (21), wherein the rotating lever (21) is rotatably connected to the box body (100); when the door body (200) is closed, the lock head (22) is buckled into the lock buckle (1); when the door body (200) is opened, the lock head (22) is disengaged from the lock buckle (1); the locking component (4) is used to start when the pressure in the box body (100) reaches a first threshold value, and to stop the rotating lever (21).

3. The automatic door locking device according to claim 2, characterized in that: The rotary lever (21) comprises a rotary connection portion (211) and a first rod body (212) and a second rod body (213) formed by extending outward from the rotary connection portion (211); the rotary lever (21) is rotatably connected to the box body (100) via the rotary connection portion (211); the other end of the first rod body (212) forms the lock head (22); and the other end of the second rod body (213) is used for stopping with the locking component (4).

4. The automatic door locking device according to claim 3, characterized in that: The locking component (4) comprises a telescopic rod (41). When the pressure in the box (100) reaches the first threshold value, the telescopic rod (41) extends toward the second rod body (213), and in the second rotation direction, the telescopic rod (41) is located in front of the second rod body (213) to stop the rotating lever (21) from rotating along the second direction.

5. The automatic door locking device according to claim 4, characterized in that: The end of the other end of the second rod body (213) is provided with an inclined surface (2131), and the inclined surface (2131) can abut against the telescopic rod (41) when it is extended, so that the telescopic rod (41) applies a force to the second rod body (213) through the inclined surface (2131) to rotate the second rod body (213) toward the first direction, so that the lock head (22) pulls the lock buckle (1) into the box body (100); when the telescopic rod (41) is extended to the right position, the telescopic rod (41) passes over the inclined surface (2131) and stops on the second rod body (213); when the steam pressure in the box body (100) pushes the door body (200) outward, it drives the rotating lever (21) to have a tendency to rotate in the second direction, and the second rod body (213) applies pressure to the telescopic rod (41) to reversely lock.

6. The automatic door locking device according to claim 4, characterized in that: The locking component (4) further comprises an electromagnet (42), wherein the electromagnet (42) is fixed on the box body (100), and the telescopic rod (41) is passed through the electromagnet (42). When the electromagnet (42) is powered on or off, the telescopic rod (41) extends toward the rotating lever (21), and when the electromagnet (42) is powered off or on, the telescopic rod (41) retracts.

7. The automatic door locking device according to claim 4, characterized in that: The locking component (4) further comprises a motor (43) and a cam (45) arranged on an output shaft of the motor (43) and rotating with the output shaft. When the cam (45) rotates, it can push the telescopic rod (41) to extend toward the rotating mechanism (21), or cancel the pushing of the telescopic rod (41) so that the telescopic rod (41) can be retracted, and avoid the rotation of the rotating lever (21).

8. The automatic door locking device according to claim 7, characterized in that: The locking component (4) further comprises a reset component (46) and a micro switch (47); one end of the reset component (46) is connected to the box (100), and the other end of the reset component (46) is connected to the telescopic rod (41); the reset component (46) is used to apply a force to the telescopic rod (41) to reset it to a retracted state; the micro switch (47) is arranged on the box (100) and is electrically connected to the motor (43); when the telescopic rod (41) is extended toward the rotating lever (21) under the action of the cam (45), the micro switch (47) can be triggered to stop the motor (43) and drive the reset component (46) to stretch to accumulate elastic potential energy.

9. The automatic door locking device according to claim 2, characterized in that: The elastic component (3) comprises a torsion spring, one end of which is arranged on the rotating lever (21), and the other end of which is arranged on the box body (100).

10. A pressure steam oven, comprising a box body (100) and a door body (200), wherein a cooking cavity is formed in the box body (100), the box body (100) is provided with a box opening communicating with the cooking cavity, and the door body (200) is used to open or close the box opening, characterized in that: The pressure steam oven further comprises the automatic door locking device according to any one of claims 1 to 9.

11. The pressure steam oven according to claim 10, characterized in that: The pressure steam oven further comprises a convection fan device (300), wherein the convection fan device (300) comprises a convection fan (301), a convection fan blade (302), a convection fan blade cover (303) and a first sealing ring (304), wherein the convection fan (301) is fixed to the housing (100), the convection fan blade cover (303) is arranged on the outside of the convection fan blade (302) and is used to separate the convection fan (301) and the convection fan blade cover (303), and ...). The output shaft of the fan (301) passes through the convection fan cover (303) and is connected to the convection fan blade (302) for driving the convection fan blade (302) to rotate. When the convection fan blade (302) rotates, it is used to drive the hot air circulation in the box (100). The first sealing ring (304) is sleeved on the output shaft, and one end of the first sealing ring (304) is tightly pressed against the convection fan cover (303), and the other end is tightly pressed against the body of the convection fan (301).

12. The pressure steam oven according to claim 10, characterized in that: The pressure steam oven further comprises a second sealing ring (201), the second sealing ring (201) comprising an annular main body (2011) and at least one folded lip edge portion extending outwardly from the main body (2011); when the lip edge portion is multi-folded, the multi-folded lip edge portions are sequentially connected to form a Z-shaped bend, and one end of the innermost folded lip edge portion is connected to the main body (2011), and a reinforcing structure is provided on the outermost folded lip edge portion, and the thickness of the outermost folded lip edge portion is thicker than that of other folded lip edge portions; an annular groove (101) is provided on the periphery of the box opening of the oven, the main body (2011) is arranged in the annular groove (101), and is provided with spaced hollow structures (2012) so that the main body (2011) can be deformed and fixed in the annular groove (101); when the door body (200) is closed, the outermost folded lip edge portion is pressed against the inner side of the door body (200).

13. The pressure steam oven according to claim 10, characterized in that: The pressure steam oven further comprises a steam exhaust pressure relief device, the steam exhaust pressure relief device comprising a steam valve (401), a steam exhaust component (402), a pressure relief component (403), a steam exhaust pipeline (404), a pressure relief pipeline (405) and a steam inlet pipeline (406), one end of the steam exhaust pipeline (404) is connected to the outlet of the steam valve (401), the other end of the steam exhaust pipeline (404) is provided with the steam exhaust component (402), one end of the steam inlet pipeline (406) is connected to the inlet of the steam valve (401), the other end of the steam inlet pipeline (406) is connected to one end of the pressure relief pipeline (405), the other end of the pressure relief pipeline (405) is provided with the pressure relief component (403), and the steam inlet pipeline (406) is provided with a steam inlet communicating with the inside of the box (100); When the pressure steam oven is not in the pressure cooking mode, the steam valve (401) is disconnected from the power supply and is in an open state, the steam inlet pipeline (406) is connected to the steam exhaust pipeline (404), and the steam in the box (100) can be exhausted through the steam exhaust component; When the pressure steam oven starts the pressure cooking mode, the steam valve (401) is powered on and in a closed state, the steam inlet pipeline (406) is disconnected from the steam exhaust pipeline (404), and the steam in the box (100) is discharged through the pressure relief component (403) when the set pressure is reached.

14. The pressure steam oven according to claim 10, characterized in that: The pressure steam oven further comprises an evaporation device (900), wherein the evaporation device (900) is arranged at the bottom of the box body (100), and the evaporation surface of the evaporation device (900) is lower than the inner bottom surface of the box body (100).

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