CN107788860B

CN107788860B - Pressure oven

Info

Publication number: CN107788860B
Application number: CN201610806656.1A
Authority: CN
Inventors: 郭建刚; 朱胜鹃
Original assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Current assignee: Guangdong Xinbao Electrical Appliances Holdings Co Ltd
Priority date: 2016-09-06
Filing date: 2016-09-06
Publication date: 2024-04-09
Anticipated expiration: 2036-09-06
Also published as: CN107788860A

Abstract

The invention provides a pressure oven, which comprises an oven body; the upper cover is arranged at the top end of the box body and can rotate relative to the box body so as to open or close the pressure oven; and the rotary supporting part is connected with the upper cover and pivoted with the lower part of the box body so as to drive the upper cover to rotate relative to the box body. The pressure oven adopts an upper cover opening mode with higher safety, so that the safety of user operation can be improved, and scalding caused by touching a heating tube in the oven when a user places food to be roasted is avoided.

Description

Pressure oven

Technical Field

The present invention relates to a pressure oven, and more particularly, to a pressure oven with an upper cover.

Background

Currently, all pressure ovens on the market are front door pressure ovens, which generally have the following drawbacks:

1) The door body area is large, the visual window area is small, and the visual window is vertical to the horizontal plane and has larger angle deviation with the visual angle of a user, so that the user can hardly observe the cooking effect of food in the box body in the cooking process;

2) When the pressure oven with the front door opening structure is opened and closed, the door body is in a free rotation state, the high-temperature door body is easy to touch a human body, and a user has potential danger of being scalded;

3) The heating tube in the oven cavity is directly exposed in the cavity, and a user can easily touch the triggering heat tube to cause scalding when taking food;

4) The pressure relief operation is complex, and the pressure cannot be relieved in time;

5) The oven door body adopts unilateral locking mode, and locking is unstable, leads to the gas tightness poor.

Disclosure of Invention

The invention aims to solve the problem of providing a pressure oven adopting an upper cover opening mode with higher safety.

In order to solve the above problems, the present invention provides a pressure oven comprising:

a case;

the upper cover is arranged at the top end of the box body and can rotate relative to the box body so as to open or close the pressure oven; and

the rotary supporting part is connected with the upper cover and pivoted with the lower part of the box body to drive the upper cover to rotate relative to the box body.

Preferably, the case includes a liner assembly, the pressure oven further includes a locking mechanism for locking and positioning the upper cover when the pressure oven is closed so that the upper cover seals the liner assembly, the locking mechanism including:

the locking piece comprises a sliding side plate and a lock catch, wherein the sliding side plate is installed on the liner assembly, and the lock catch is arranged at the end part of the sliding side plate; and

one end of the control handle is hinged to the inner container assembly, and when the pressure oven is in a closed state, the control handle can drive the sliding side plate to drive the lock catch to lock the upper cover; when the pressure oven is in a locking state, the control handle can drive the sliding side plate to drive the lock catch to unlock and simultaneously drive the rotary supporting part to drive the upper cover to rotate and open. The locking mechanism can tightly lock the upper cover on the box body when the pressure oven works.

Preferably, the pressure oven further comprises a pressure lock valve; the pressure lock valve comprises a sealing gasket, a lock catch seat and a lock rod, wherein the sealing gasket is matched and fixed on a through hole of the inner container assembly, the lock catch seat is buckled on one side of the sealing gasket facing outwards, the lock rod is penetrated on the lock catch seat and the sealing gasket, and when the pressure oven works, the lock rod can move outwards along the sealing gasket and the lock catch seat under the action of pressure in the inner container assembly so as to be propped against the control handle to lock the control handle; the sealing gasket is provided with an elastic part, and the lock rod is connected with the elastic part and used for driving the lock rod to reset. The pressure lock valve can enable the pressure in the box body of the pressure oven to be stable during operation, and safety accidents caused by the fact that a user opens the upper cover by mistake during operation of the pressure oven can be effectively avoided.

Preferably, the locking pieces are two groups and are respectively arranged on two opposite sides of the liner assembly through mounting plates; the control handle also comprises a first linkage piece which can enable the locking pieces at two sides to be linked, wherein the first linkage piece comprises a first connecting rod positioned below the inner container assembly and two second connecting rods respectively arranged at two ends of the first connecting rod;

one end of the control handle, which is hinged with the inner container assembly, is provided with an arc-shaped notch, and a first arc-shaped groove with the same orientation as the notch is arranged on the control handle close to the hinged end; the end part of the second connecting rod is connected with a pin penetrating through the first arc-shaped groove;

the sliding side plate is provided with a second arc-shaped groove and a third arc-shaped groove in parallel, and is connected with the control handle through a pin shaft penetrating through the third arc-shaped groove; the sliding side plate is also provided with two first long holes in parallel, and the length direction of the first long holes is perpendicular to the bottom surface of the box body when the upper cover is locked; the mounting plate is correspondingly provided with a pin penetrating through the first long hole, the mounting plate is also provided with a fifth arc-shaped groove and a sixth arc-shaped groove which are respectively opposite to the second arc-shaped groove and the third arc-shaped groove, wherein the pin penetrating through the second arc-shaped groove is penetrated into the fifth arc-shaped groove at the same time, and the pin penetrating through the third arc-shaped groove is penetrated into the sixth arc-shaped groove at the same time. Through setting up the arc wall and can be at the round pin axle and the pin of arc inslot removal make second linkage pole and control handle can cooperate each other, reach linkage and locking effect.

Preferably, the locking piece further comprises a second linkage piece, the second linkage piece comprises a first linkage plate and two second linkage plates corresponding to two ends of the first linkage plate, one end of the first linkage plate is connected with one end of the corresponding second linkage plate through a pin passing through the second arc-shaped groove, the other end of the first linkage plate is connected to the pin shaft between the sliding side plate and the control handle, and is connected with one end of the corresponding second linkage plate through the pin shaft, and the other ends of the two second linkage plates are respectively hinged on the mounting plate in parallel;

the lock catch comprises a first lock catch and a second lock catch which are respectively arranged at two opposite ends of the sliding side plate, and the first lock catch comprises a flange arranged at the end part of the sliding side plate; the second lock catch comprises a hook plate hinged to the other end of the sliding side plate and in an L shape, a pin is arranged on the hook plate in a penetrating mode, a fourth arc-shaped groove is formed in one end of the mounting plate, the pin slides along the fourth arc-shaped groove when moving along with the sliding side plate, and the hook plate hooks the upper cover to lock or release and unlock the upper cover. The first lock catch and the second lock catch are correspondingly arranged at each vertex of the upper cover, so that the upper cover is integrally and tightly pressed on the box body, and the air tightness is ensured.

Preferably, the rotary supporting part comprises a lower bracket and two upper brackets, the upper ends of the two upper brackets are respectively connected to the corresponding sides of the upper cover and the two locking pieces and close to the rear side of the box body, the lower end of the upper bracket is provided with a platform, and the first lock catch presses down the platform when the upper cover is locked so as to tightly press the upper cover on the box body; the lower bracket is provided with a supporting plate and two relatively parallel sector plates, the two sector plates are respectively positioned outside two sides of the liner assembly provided with the locking piece and are pivoted with the lower side of the liner assembly, the upper cover rotates to open the pressure oven and moves to the rear of the box body, the upper end of the sector plate is provided with a second long hole which is vertical to the bottom plate of the box body when the upper cover is locked, and the upper bracket is penetrated with a pin so as to be connected with the second long hole; an opening chute is formed in the sector plate, and the control handle slides into the opening chute and drives the sector plate to rotate so as to open the upper cover when the control handle rotates and unlocks; the supporting plate is connected between the two sector plates and is used for surrounding the liner assembly in a matched mode with the side plates of the box body when the pressure oven is in a closed state; the locking piece further comprises a first unlocking reset spring and a second unlocking reset spring, one end of the first unlocking reset spring is connected to the mounting plate, and the other end of the first unlocking reset spring is connected to the first linkage plate; one end of the second unlocking reset spring is connected to the lower bracket, and the other end of the second unlocking reset spring is connected to the upper bracket. The rotary supporting part enables the upper cover to move to the rear side of the box body when being opened through the fan-shaped plate pivoted at the lower side of the inner container assembly, and high-temperature gas in the box is prevented from being sprayed to a user to scald the user.

Preferably, an upper heating tube is arranged on one surface of the upper cover facing the box body;

the box body comprises an inner container assembly, wherein the inner container assembly comprises an inner container with both upper and lower ends open, an inner bottom plate which is arranged in the inner container and can move up and down along the inner wall of the inner container, a lower heating tube which is arranged on the upper surface of the inner bottom plate, and a lifting assembly which is used for driving the inner bottom plate to move up and down so as to adjust the distance between the upper heating tube and the lower heating tube; and an upper cover sealing ring used for sealing between the upper cover and the inner container when the upper cover rotates to close the pressure oven is further arranged on the upper cover. The inner bottom plate can move up and down, so that a user can conveniently take food from the box body, and meanwhile, the distance between the food and the two heating pipes can be adjusted according to actual needs, so that the food can be cooked better.

Preferably, the inner container is provided with a plurality of fixing plates which are connected with the bottom plate of the box body and used for supporting and positioning the inner container; the lifting assembly comprises two screws, two sliding blocks, two lifting supporting rods and a driver, wherein the screws are arranged on the two opposite fixing plates in a penetrating manner and can rotate relative to the fixing plates, the two sliding blocks are connected with the screws in a threaded manner, the driver is used for driving the screws to rotate, one ends of the two lifting supporting rods are respectively hinged with one sliding block, the other ends of the two lifting supporting rods are simultaneously hinged with the inner bottom plate, when the screws rotate clockwise, the two sliding blocks move oppositely or reversely along the screws so that the two lifting supporting rods drive the inner bottom plate to move upwards or downwards, and when the screws rotate anticlockwise, the two sliding blocks change the moving direction so that the two lifting supporting rods drive the inner bottom plate to move downwards or upwards. The lifting supporting rod is pushed up and pulled down to the inner bottom plate by the screw rod and the sliding block, so that the lifting supporting rod is simple and convenient, and easy to prepare.

Preferably, the driver comprises a pinion arranged at the end part of the screw, a driving gear meshed with the pinion, and a driving handle or a driving motor connected with the driving gear and used for driving the driving gear to rotate. The driver adopts gears to transmit power, so that the driver is more flexible and has stronger adaptability.

Preferably, the liner is formed with a ring of supporting plates for supporting the inner bottom plate from the bottom edge of the liner in a horizontally inward extending mode, and sealing rings for sealing gaps between the inner bottom plate and the supporting plates when the inner bottom plate is abutted against the supporting plates are arranged on the supporting plates. The sealing ring can effectively prevent gas in the box body from flowing out from between the supporting plate and the inner bottom plate. Preferably, the two opposite fixing plates are further provided with first guide rods parallel to the screw rods and connected with the two sliding blocks for guiding the sliding blocks, and the supporting plate is further provided with second guide rods for enabling the inner bottom plate to move along the supporting plate for guiding the inner bottom plate. The arrangement of the first guide rod and the second guide rod can effectively ensure stable movement of the sliding block and the inner bottom plate.

Preferably, the upper cover is further provided with an outer cover, a heat-insulating air layer is formed between the outer cover and the upper cover, the upper cover and the outer cover are respectively provided with a top wall and a side wall with matched shapes, the side walls on the front sides of the upper cover and the outer cover are arranged in an outward inclined manner from the top wall of the side walls, and a visual window is arranged in a matched manner, wherein the visual window can be perpendicular to the sight of a user. The side walls of the front sides of the upper cover and the outer cover are obliquely arranged, so that a user can observe food in the box body through the visual window, the visual field is wider, and the observation effect is improved.

The pressure oven has the advantages that the oven is opened or closed in an upper cover opening mode, so that the safety of user operation can be improved, and scalding caused by touching a heating tube in the oven when a user places food to be roasted is avoided. In addition, the user can conveniently observe food in the box through the visual window arranged on the upper cover.

Drawings

Fig. 1 is a schematic structural view of a pressure oven according to the present invention.

Fig. 2 is a cover-opening state diagram of the pressure oven of the present invention.

Fig. 3 is an exploded view of the structure of the pressure oven of the present invention.

Fig. 4 is an exploded view of the upper cover assembly of the pressure oven of the present invention.

Fig. 5 is an exploded view of the liner assembly of the pressure oven of the present invention.

Fig. 6 is an exploded view of the first locking member of the pressure oven of the present invention.

Fig. 7 is an assembly view of the first locking member of the pressure oven of the present invention.

Fig. 8 is an exploded view of the second locking member of the pressure oven of the present invention.

Fig. 9 is an assembly view of the second locking member of the pressure oven of the present invention.

Fig. 10 is an exploded view of a pressure lock of the pressure oven of the present invention.

Fig. 11 is an exploded view showing the internal connection structure of the pressure lock of the pressure oven of the present invention.

Fig. 12 is a schematic view showing an opened state of an upper cover of the pressure oven of the present invention.

Fig. 13 is a schematic view of a closing process of an upper cover of the pressure oven of the present invention.

Fig. 14 is a schematic view showing a closed state of an upper cover of the pressure oven of the present invention.

Fig. 15 is a schematic view of a locking shape of an upper cover of the pressure oven of the present invention.

Fig. 16 is a schematic view showing a state in which the upper cover of the pressure oven of the present invention is locked.

Fig. 17 is a schematic view showing a locked state of a pressure lock catch of the pressure oven of the present invention.

Fig. 18 is a schematic view of the structure of the pressure oven of the present invention in the bottom seal.

Fig. 19 is a schematic view showing a structure of the pressure oven of the present invention when the inner bottom plate is lifted.

Fig. 20 is a schematic view showing the structure of the pressure oven of the present invention when the inner bottom plate is raised to the highest position.

Fig. 21 is a state diagram of the heating chamber when the inner bottom plate is at the topmost position in the pressure oven of the present invention.

Fig. 22 is a state diagram of the heating chamber when the inner bottom plate is at the lowest end in the pressure oven of the present invention.

Reference numerals:

1-an outer cover; 2-an upper cover; 3-visual window; 4-heating tubes; 5-a bottom plate; 6-side plates; 7-upper support; 8-sector plates; 9-a connector; 10-a lower bracket; 11-a support plate; 12-a first unlocking return spring; 13-a platform; 14-an inner container; 15-an inner bottom plate; 16-discharging a heating tube; 17-a fixed plate; 18-screw; 19-a slider; 20-lifting stay bars; 21-pinion; 22-a drive gear; 23-driving a handle; 24-supporting plates; 25-sealing rings; 26-a first guide bar; 27-a second guide bar; 28-rollers; 29-opening chute; 30-a first link; 31-a first linkage plate; 32-sliding side plates; 33-a first arcuate slot; 34-a second arcuate slot; 35-a first elongated hole; 36-a first latch; 37-a second latch; 38-a second linkage plate; 39-a second link; 40-a control handle; 41-a third arc-shaped groove; 42-mounting plates; 43-fourth arc groove; 44-a fifth arc-shaped groove; 45-sixth arc grooves; 46, pushing a handle; 47-pin shafts; 48-a second unlocking return spring; 49-pressure lock valve; 50-a latch seat; 51-sealing gasket; 52-an elastic part; 53-locking bar; 54-grill; 55-a slag receiving plate; 56-a pressure maintaining valve; 57-bracing rods; 58-upper cover sealing ring.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings.

As shown in fig. 1, the present embodiment provides a pressure oven, which includes:

a case; and

and the upper cover component is arranged at the top end of the box body and can rotate relative to the box body so as to open or close the pressure oven. The upper cover assembly comprises an upper cover 2 and a rotary supporting part, wherein the rotary supporting part is connected with the upper cover 2 and pivoted with the lower part of the box body to drive the upper cover 2 to rotate relative to the box body, and moves to the rear of the box body when the upper cover 2 rotates to open the pressure oven, and moves to the front of the box body when the upper cover 2 rotates to close the pressure oven. Namely, the upper cover 2 can rotate relative to the box body through the rotary supporting part, so that the upper cover 2 can perform the actions of opening and closing the cover. And as shown in fig. 2, when the upper cover 2 is opened, the upper cover 2 can move to the rear of the box body while turning upwards, so as to avoid high-temperature steam in the box body from being sprayed out to the direction of a user and scalding the user.

As shown in fig. 3 and 4, the upper cover assembly in this embodiment includes an upper cover 2 and an outer cover 1 sleeved outside the upper cover 2, an air barrier for heat insulation is formed between the outer cover 1 and the upper cover 2, and an upper heating tube 4 and an upper cover sealing ring 58 for sealing a gap between the upper cover 2 and the inner container assembly when the upper cover 2 is turned to close the pressure oven are provided on one surface of the upper cover 2 facing the inner container assembly. Namely, the outer cover 1 can play a role in heat preservation and heat insulation. With continued reference to fig. 1 and 2, the upper cover 2 and the outer cover 1 each have a top wall and a side wall, and the front side walls of the upper cover 2 and the outer cover 1 (i.e., the side facing the user) are provided with a viewing window 3 for the user to observe the food in the case. Preferably, the front side walls of the upper cover 2 and the outer cover 1 in this embodiment are inclined outwards from the top wall thereof, so that the line of sight of the user is perpendicular to the window of the visual window 3, the user can more clearly and intuitively observe the food in the box from the visual window 3, and the field of vision is wider.

Further, as further shown in fig. 3 and 4, the case includes a liner assembly, a bottom plate 5 for supporting and fixing the liner assembly, and a side plate 6 disposed at the periphery of the liner assembly and connected to the bottom plate 5. The case in this embodiment is in a cube shape, and the side plate 6 thereof is in a U shape, and the open end of the side plate 6 of the U shape faces the rear side of the case to enclose the liner assembly (the support plate 11 will be described in detail later) in cooperation with the support plate 11 when the upper cover 2 is turned to be closed. The oven body is also provided with a control component 60 for controlling the temperature of the oven, and the control component 60 at least comprises a control panel and a temperature controller.

As shown in fig. 6 to 9, the pressure oven further comprises a locking mechanism for locking the positioning of the upper cover 2 when the pressure oven is closed. That is, the locking mechanism is used for locking the upper cover assembly on the open end of the box body when the pressure oven is in a closed state, so that the upper cover assembly can seal the box body, the internal pressure of the pressure oven is ensured to be constant during operation, and the cooking of food is more fragrant and mellow.

The locking mechanism includes a locking member and a control handle 40. The locking member includes a sliding side plate 32 movably mounted on the liner assembly and a latch provided at an end of the sliding side plate 32 for locking/unlocking the upper cover 2 when the sliding side plate 32 is operated. One end of the control handle 40 is hinged on the inner container assembly, and when the control handle 40 rotates, the rotary supporting part is driven to enable the upper cover 2 to rotate to be opened or closed, and meanwhile, the sliding side plate 32 is driven to drive the lock catch to lock/unlock the upper cover 2. In this embodiment, a round hole is formed at the top end of the control handle 40, a pin with double slots is connected to the mounting plate 42, and the round hole of the control handle 40 is sleeved in the slot near the outer side of the pin so as to be hinged to the mounting plate 42.

Preferably, since the pressure oven generates pressure inside during the cooking of food, in order to avoid safety accidents caused by the user opening the oven by mistake during the operation of the oven, and simultaneously, in order to ensure that the locking member can stably lock the upper cover 2, as shown in fig. 6 and 7, the embodiment is further provided with a pressure lock valve 49 for locking the control handle 40 under the action of the internal pressure of the inner container assembly on the side of the inner container assembly connected with the control handle 40. The pressure lock valve 49 includes a gasket 51 fitted and fixed on a through hole of the liner assembly, a latch seat 50 fastened to an outward side of the gasket 51, and a lock lever 53 penetrating and movable along the latch seat 50 and the gasket 51. The gasket 51 has an elastic portion 52, and the lock lever 53 is connected to the elastic portion 52. When the pressure oven works, the lock rod 53 can move to the direction outside the lock catch base 50 under the pressure in the liner assembly to prop against the control handle 40 so as to lock the control handle 40 (the elastic part 52 is pushed to deform in the moving process of the lock rod 53). That is, when the pressure in the bladder assembly reaches a certain value, the pressure lock valve 49 locks the locking member under the pressure in the bladder assembly. Specifically, when the pressure oven is operated, the lock lever 53 moves under the pressure in the liner assembly to be blocked against the corresponding second link 39 (described in detail below) to lock the second link 39 of the locking member, thereby locking the control handle 40 connected to the second link 39 so that the upper cover 2 cannot be opened. Because the elastic part 52 is outwards deformed under the pushing action of the lock rod 53, when the pressure in the liner component is released, the lock rod 53 is not acted by the pressure of the liner component, so that the elastic part 52 and the elastic part 52 are reset together under the action of the elastic restoring force of the elastic part 52 to release the locking of the control handle 40, and at the moment, a user can rotate the control handle 40 to open the upper cover 2 and take food. In this embodiment, the pressure maintaining valve 56 is provided on the upper cover 2 and the outer cover 1 in a matching manner, so as to ensure that the pressure in the inner container assembly is constant when the pressure oven cooks food, and the user can safely open the upper cover 2, so as to discharge the pressure in the inner container assembly when needed. That is, when the user wants to open the upper cover 2 at the end of cooking, the pressure of the box body needs to be relieved by the pressure maintaining valve 56, and then the control handle 40 is rotated to open the upper cover 2.

In this embodiment, the locking members are two groups and are respectively disposed on two opposite sides of the liner assembly through the mounting plates 42. The control handle 40 further includes a first linkage member capable of linkage of the locking members at both sides, the first linkage member including a first link 30 positioned below the liner assembly and two second links 39 respectively provided at both ends of the first link 30. The control handle 40 is connected to the second link 39 and drives the slide side plate 32 to move.

The end of the control handle 40 hinged with the liner component is provided with an arc-shaped notch, and the control handle 40 near the hinged end is provided with a first arc-shaped groove 33 with the same orientation as the notch. The end of the second link 39 is connected to a pin which is inserted into the first arcuate slot 33. The sliding side plate 32 is provided with a second arc-shaped groove 34 and a third arc-shaped groove 41 in parallel, the sliding side plate 32 is connected with the control handle 40 through a pin 47 penetrating through the third arc-shaped groove 41, and the pin 47 can move along the second arc-shaped groove 34 and drive the sliding side plate 32 to move up and down when the control handle 40 rotates. The sliding side plate 32 is also provided with two first long holes 35 which are vertical to the bottom plate 5 of the box body in the length direction when the upper cover 2 is locked. The mounting plate 42 is correspondingly provided with a pin passing through the first long hole 35, and a fifth arc-shaped groove 44 and a sixth arc-shaped groove 45 respectively corresponding to the second arc-shaped groove 34 and the third arc-shaped groove 41, so that the pin passing through the second arc-shaped groove 34 and the pin 47 passing through the third arc-shaped groove 41 are correspondingly penetrated in the fifth arc-shaped groove 44 and the sixth arc-shaped groove 45 at the same time, and the function of guiding and sliding the pin and the pin 47 is achieved.

The locking member further comprises a second linkage member including a first linkage plate 31 and two second linkage plates 38 corresponding to both ends of the first linkage plate 31. One end of the first linkage plate 31 is connected with one end of the corresponding second linkage plate 38 through a pin passing through the second arc-shaped groove 34, the other end of the first linkage plate 31 is connected to a pin 47 between the sliding side plate 32 and the control handle 40, and is connected with one end of the corresponding second linkage plate 38 through the pin 47, and the other ends of the two second linkage plates 38 are respectively hinged on the mounting plate 42 in parallel.

Further, the lock catch in this embodiment includes a first lock catch 36 and a second lock catch 37 respectively provided at both ends of the sliding side plate 32. The first latch 36 includes a flange provided at an end of the sliding side plate 32. The second locker 37 includes a hook plate hinged to the other end of the sliding side plate 32 in an L shape. A pin is arranged on the hook plate in a penetrating manner, a fourth arc-shaped groove 43 is arranged at one end of the mounting plate 42 corresponding to the pin, and the pin stretches into the fourth arc-shaped groove 43 so as to slide along the fourth arc-shaped groove 43 when the sliding side plate 32 moves, so that the hook plate hooks the front side of the upper cover 2 and locks or unlocks with the front side of the upper cover 2. I.e. the second catch 37 is used to lock the front side of the upper cover 2. The hook plate in this embodiment is hooked with the front edge of the upper cover 2 when the upper cover 2 is locked, and may be hooked with the side edge of the upper cover 2 near the front side.

With continued reference to fig. 3 and 4, the rotary support portion includes a lower bracket 10 and two upper brackets 7, the upper ends of the two upper brackets 7 are respectively connected to the corresponding sides of the upper cover and the two locking members and near the rear side of the box body, the upper brackets 7 in this embodiment are connected to the corners of the upper cover 2 adjacent to the rear side thereof, the lower ends of the upper brackets 7 are provided with platforms 13, and when the upper cover 2 is locked, the first lock catch 36 presses down the platforms 13 to drive the upper cover 2 to move downwards so that the rear side thereof can be tightly pressed against the box body. Namely, by arranging the first lock catch 36 and the second lock catch 37, the front side and the rear side of the upper cover 2 are subjected to locking force when the upper cover is locked, and the tight connection between the upper cover 2 and the box body is effectively ensured. The lower bracket 10 is provided with a supporting plate 11 and two relatively parallel sector plates 8, the two sector plates 8 are respectively positioned outside two opposite sides of the liner assembly and are respectively pivoted with the lower side of the liner assembly, the upper ends of the two sector plates 8 are correspondingly provided with second long holes which are perpendicular to the bottom plate 5 of the box body when the upper cover 2 is locked at the adjacent part of the upper bracket 7, and the upper bracket 7 is connected with the second long holes through pins. The support plate 11 is connected between the two sector plates 8, and can be used for supporting the upper cover 2 in a matched mode with the sector plates 8 when the upper cover 2 is opened, and can also be used for surrounding the liner assembly in a matched mode with the U-shaped side plates 6 of the box body when the pressure oven is in a closed state. Preferably, the locking member in this embodiment further includes a first unlocking return spring 12 and a second unlocking return spring 48, where one end of the first unlocking return spring 12 is connected to the mounting plate 42, and the other end is connected to the first link 30, so as to be used for driving the sliding side plate 32 to return through the first link 30 after the upper cover 2 is locked, so as to further ensure that the locking state of the upper cover 2 is stable. The second unlocking return spring 48 has one end connected to the lower bracket 10 and the other end connected to the upper bracket 7, and is also used for ensuring the locking state of the upper cover 2 to be stable.

In order to combine the opening and unlocking actions of the upper cover 2 into a whole, that is, the upper cover 2 can be driven to be opened after the upper cover 2 is unlocked by the control handle 40, the end of the control handle 40 in the embodiment is connected with the push handle 46 through the roller 28, the fan-shaped plate 8 on the same side as the push handle 46 is provided with the opening chute 29, and when the push handle 46 is pushed to drive the control handle to unlock, the roller 28 slides into the opening chute 29 and slides along the opening chute 29 along with the continuous movement of the control handle 40, and simultaneously acts with the wall of the roller to push or press the wall of the groove, thereby driving the upper cover 2 to open and close the box.

In particular use, as shown in fig. 12, for example, when the case is in an open state, the roller 28 connected to the push handle 46 and the control handle 40 is positioned in the open chute 29, and at this time, the push handle 46 is pushed to bring the upper cover 2 into a closing process. As shown in fig. 13, the pushing handle 46 drives the roller 28 to slide along the opening chute 29 and push the sector plate 8 downward, so that the sector plate 8 drives the upper cover 2 to rotate until the upper cover 2 is buckled on the box body. During closing, since the movement track of the roller 28 coincides with the movement track of the opening chute 29 in the initial stage, the movement track of the pin in the first arc-shaped groove 33 coincides with the movement track of the first arc-shaped groove 33, so that the first and second links are not stressed, i.e. the control handle 40 is not forced to move the first and second links during rotation about its hinge point, and the locking member is not actuated during this period.

As shown in fig. 14, after the upper cover 2 is fastened to the box, the roller 28 slides away from the opening chute 29, and continues to push the pushing handle 46, so that the upper side wall of the third arc-shaped slot 41 pushes the pin located therein to move along the third arc-shaped slot 41, and then sequentially drives the second connecting rod 39 and the first connecting rod 30 connected with the pin, and simultaneously drives the other second connecting rod 39 opposite to the second connecting rod 39 to rotate, that is, the second connecting rod 39 on the other side rotates, and when the second connecting rod 39 on the other side rotates, the pin connected with the second connecting rod drives the control handle 40 on the same side to rotate, so that synchronous movement of the control handles 40 of the two locking pieces is realized. Further, the pin shafts 47 connected to the control handles 40 move along the corresponding third arc grooves 41 when the control handles 40 rotate, and press the third arc grooves 41, so that the sliding side plates 32 move downward integrally to drive the upper cover 2 to move downward integrally synchronously, and the hook plates move along the fourth arc grooves 43 along with the downward movement of the sliding side plates 32, so that the hook parts move to the front side of the upper cover 2 to press the upper cover 2 while moving downward, and the locking of the upper cover 2 is realized.

Referring to fig. 15, when the pin located in the first arc groove 33 of the control handle 40 slides upward along the first arc groove 33, the pin 47 connected to the third arc groove 41 moves along the third arc groove 41 while moving the second linkage until the locking action of the upper cover 2 is completed, i.e., the locking piece and the upper cover 2 are in the state shown in fig. 16, when the pin in the first arc groove 33 slides to the top end of the first arc groove 33. After the upper cover 2 is locked, the pushing handle 46 is stopped, and at this time, the pin 47 is limited in the third arc-shaped groove 41 under the action of the first unlocking return spring 12 and does not contact with the groove wall of the third arc-shaped groove 41, so as to stabilize the lock catch and prevent the lock catch from loosening.

When the locking piece locks the upper cover 2, the pressure oven can start to work, and when the pressure in the liner component reaches a certain value, the lock rod 53 of the pressure lock valve 49 is pushed by the elastic part 52 to move outwards and is blocked with the corresponding second connecting rod 39, so as to prevent the second connecting rod 39 and the control handle 40 from moving, and further ensure that the pressure oven is in a stable closed state.

Further, as shown in fig. 5, the inner container assembly includes an inner container 14 having both upper and lower ends opened, an inner bottom plate 15 provided in the inner container 14 and capable of moving up and down along an inner wall of the inner container 14, a lower heating tube 16 fixed on the inner bottom plate 15 by a stay 57, a lifting assembly for driving the inner bottom plate 15 to move up and down to adjust a distance between the upper heating tube 4 and the lower heating tube 16, and a grill 54 and a slag receiving plate 55 provided in the inner container 14. Wherein, two sector plates 8 in the rotary support part are respectively pivoted with the inner container 14 through the connecting piece 9. Both locking elements are also provided on both sides of the liner 14. Preferably, in this embodiment, the inner bottom plate 15 is lifted to adjust the size of the heating chamber (the heating chamber is formed by the portion of the chamber between the upper heating tube and the lower heating tube), for example, as shown in fig. 21 and 22, the heating chamber is in the minimum state shown in fig. 21, and the heating chamber is in the maximum state shown in fig. 22. The size of the heating cavity can be adjusted according to actual needs by a user, meanwhile, the user can conveniently place and take food, and particularly, the user can be effectively prevented from being contacted with the liner 14 when taking food, so that scalding is caused. In order to better limit the inner bottom plate 15, a ring of supporting plates 24 capable of supporting the inner bottom plate 15 is arranged in the bottom end of the inner container 14 in the embodiment, so that the bottom of the inner container 14 can be sealed when the inner bottom plate 15 slides to the bottom of the inner container 14, namely, the bottom wall of the inner container 14 is formed. The fixing plate 17 is arranged outside the bottom of the pallet 24. In this embodiment, the support plate 24 is further provided with a sealing ring 25 for sealing the gap between the support plate and the inner bottom plate 15.

Further, the inner container 14 is provided with a plurality of fixing plates 17 which are connected with the bottom plate 5 of the box body and used for supporting and positioning the inner container 14. The fixing plate 17 in this embodiment is provided outside the pallet 24. The lifting assembly comprises a screw 18 which penetrates through two opposite fixing plates 17 and can rotate relative to the fixing plates 17, two sliding blocks 19 which are connected to the screw 18 in a threaded manner, two lifting supporting rods 20 and a driver for driving the screw 18 to rotate.

With continued reference to fig. 17 to 20, one end of each of the two lifting supporting rods 20 is hinged to one of the sliding blocks 19, the other end of each of the two lifting supporting rods 20 is hinged to the inner bottom plate 15, the threaded rod 18 is provided with two threads with opposite directions, and the two sliding blocks 19 are respectively arranged on the two threads, so that when the driver drives the threaded rod 18 to rotate clockwise, the two sliding blocks 19 can move along the threaded rod 18 in opposite directions to drive the two lifting supporting rods 20 to push the inner bottom plate 15 upwards (or downwards), and when the threaded rod 18 rotates anticlockwise, the two lifting supporting rods 20 are driven to pull the inner bottom plate 15 downwards (or downwards). Of course, the direction of the internal threads of the two sliders 19 may be changed to move them toward and away from each other along the screw 18. Further, the driver in this embodiment includes a pinion 21 disposed at an end of the screw 18, a driving gear 22 disposed on the inner container 14 and meshed with the pinion 21 (the driving gear 22 in this embodiment is disposed on the mounting plate 42 on the corresponding side), and a driving handle 23 connected to the driving gear 22 and extending out of the case, where the driving handle 23 is used to rotate the driving gear 22 to rotate the pinion 21 and the screw 18 connected to the pinion 21, so as to move the two sliders 19 and the lifting brace 20. Of course, a motor may alternatively be used to drive the screw 18 in rotation.

In addition, the two mounting plates 42 are preferably further provided with first guide rods 26 connected to the two sliders 19 for guiding the sliding direction of the sliders 19. The pallet 24 is further provided with a second guide bar 27 connected to the inner bottom plate 15 for restricting the sliding direction of the inner bottom plate 15, i.e., the inner bottom plate 15 moves up and down along the second guide bar 27.

The above embodiments are only exemplary embodiments of the present invention and are not intended to limit the present invention, the scope of which is defined by the claims. Various modifications and equivalent arrangements of this invention will occur to those skilled in the art, and are intended to be within the spirit and scope of the invention.

Claims

1. A pressure oven, comprising:

the box body is in a cube shape and is provided with a U-shaped side plate with an opening facing the rear side of the box body;

the rotary supporting part is connected with the upper cover and pivoted with the lower part of the box body to drive the upper cover to rotate relative to the box body;

the box includes the inner bag subassembly, pressure oven still includes the locking mechanism that is used for locking the location when pressure oven closes the upper cover so that the upper cover seals the inner bag subassembly, locking mechanism includes:

one end of the control handle is hinged to the inner container assembly, and when the pressure oven is in a closed state, the control handle can drive the sliding side plate to drive the lock catch to lock the upper cover; when the pressure oven is in a locking state, the control handle can drive the sliding side plate to drive the lock catch to unlock and simultaneously drive the rotary supporting part to drive the upper cover to rotate and open;

the locking pieces are two groups and are respectively arranged on two opposite sides of the liner assembly through mounting plates; the control handle also comprises a first linkage piece which can enable the locking pieces at two sides to be linked, wherein the first linkage piece comprises a first connecting rod positioned below the inner container assembly and two second connecting rods respectively arranged at two ends of the first connecting rod;

the sliding side plate is provided with a second arc-shaped groove and a third arc-shaped groove in parallel, and is connected with the control handle through a pin shaft penetrating through the third arc-shaped groove; the sliding side plate is also provided with two first long holes in parallel, and the length direction of the first long holes is perpendicular to the bottom surface of the box body when the upper cover is locked; the mounting plate is correspondingly provided with a pin penetrating through the first long hole, the mounting plate is also provided with a fifth arc-shaped groove and a sixth arc-shaped groove which are respectively opposite to the second arc-shaped groove and the third arc-shaped groove, wherein the pin penetrating through the second arc-shaped groove is penetrated into the fifth arc-shaped groove at the same time, and the pin penetrating through the third arc-shaped groove is penetrated into the sixth arc-shaped groove at the same time.

2. The pressure oven of claim 1 further comprising a pressure lock valve;

the pressure lock valve comprises a sealing gasket, a lock catch seat and a lock rod, wherein the sealing gasket is matched and fixed on a through hole of the inner container assembly, the lock catch seat is buckled on one side of the sealing gasket facing outwards, the lock rod is penetrated on the lock catch seat and the sealing gasket, and when the pressure oven works, the lock rod can move outwards along the sealing gasket and the lock catch seat under the action of pressure in the inner container assembly so as to be propped against the control handle to lock the control handle; the sealing gasket is provided with an elastic part, and the lock rod is connected with the elastic part and used for driving the lock rod to reset.

3. The pressure oven according to claim 2, wherein the locking member further comprises a second linkage member, the second linkage member comprises a first linkage plate and two second linkage plates corresponding to two ends of the first linkage plate, one end of the first linkage plate is connected with one end of the corresponding second linkage plate through a pin passing through the second arc-shaped groove, the other end of the first linkage plate is connected to the pin shaft between the sliding side plate and the control handle, and is connected with one end of the corresponding second linkage plate through the pin shaft, and the other ends of the two second linkage plates are respectively hinged on the mounting plate in parallel;

the lock catch comprises a first lock catch and a second lock catch which are respectively arranged at two opposite ends of the sliding side plate, and the first lock catch comprises a flange arranged at the end part of the sliding side plate; the second lock catch comprises a hook plate hinged to the other end of the sliding side plate and in an L shape, a pin is arranged on the hook plate in a penetrating mode, a fourth arc-shaped groove is formed in one end of the mounting plate, the pin slides along the fourth arc-shaped groove when moving along with the sliding side plate, and the hook plate hooks the upper cover to lock or release and unlock the upper cover.

4. A pressure oven according to claim 3, wherein the rotary supporting part comprises a lower bracket and two upper brackets, the upper ends of the two upper brackets are respectively connected to the corresponding sides of the upper cover and the two locking pieces and are close to the rear side of the oven body, the lower end of the upper bracket is provided with a platform, and the first lock catch presses down the platform when locking the upper cover so that the upper cover is tightly pressed on the oven body; the lower bracket is provided with a supporting plate and two relatively parallel sector plates, the two sector plates are respectively positioned outside two sides of the liner assembly provided with the locking piece and are pivoted with the lower side of the liner assembly, so that the upper cover can move to the rear of the box body when being rotated to open the pressure oven, the upper end of the sector plate is provided with a second long hole which is vertical to the bottom plate of the box body when the upper cover is locked, and the upper bracket is penetrated with a pin so as to be connected with the second long hole; an opening chute is formed in the sector plate, and the control handle slides into the opening chute and drives the sector plate to rotate so as to open the upper cover when the control handle rotates and unlocks; the supporting plate is connected between the two sector plates and is used for surrounding the liner assembly in a matched mode with the side plates of the box body when the pressure oven is in a closed state;

the locking piece further comprises a first unlocking reset spring and a second unlocking reset spring, one end of the first unlocking reset spring is connected to the mounting plate, and the other end of the first unlocking reset spring is connected to the first linkage plate; one end of the second unlocking reset spring is connected to the lower bracket, and the other end of the second unlocking reset spring is connected to the upper bracket.

5. The pressure oven of claim 1 wherein,

an upper heating tube is arranged on one surface of the upper cover facing the box body;

the box body comprises an inner container assembly, wherein the inner container assembly comprises an inner container with both upper and lower ends open, an inner bottom plate which is arranged in the inner container and can move up and down along the inner wall of the inner container, a lower heating tube which is arranged on the upper surface of the inner bottom plate, and a lifting assembly which is used for driving the inner bottom plate to move up and down so as to adjust the distance between the upper heating tube and the lower heating tube;

and an upper cover sealing ring used for sealing between the upper cover and the inner container when the upper cover rotates to close the pressure oven is further arranged on the upper cover.

6. The pressure oven of claim 5, wherein the inner container is provided with a plurality of fixing plates connected with a bottom plate of the oven body for supporting and positioning the inner container; the lifting assembly comprises two screws, two sliding blocks, two lifting supporting rods and a driver, wherein the screws are arranged on the two opposite fixing plates in a penetrating manner and can rotate relative to the fixing plates, the two sliding blocks are connected with the screws in a threaded manner, the driver is used for driving the screws to rotate, one ends of the two lifting supporting rods are respectively hinged with one sliding block, the other ends of the two lifting supporting rods are simultaneously hinged with the inner bottom plate, when the screws rotate clockwise, the two sliding blocks move oppositely or reversely along the screws so that the two lifting supporting rods drive the inner bottom plate to move upwards or downwards, and when the screws rotate anticlockwise, the two sliding blocks change the moving direction so that the two lifting supporting rods drive the inner bottom plate to move downwards or upwards.

7. The pressure oven of claim 6, wherein the driver comprises a pinion gear disposed at an end of the screw, a drive gear engaged with the pinion gear, and a drive handle or drive motor coupled to the drive gear for driving the drive gear to rotate.

8. The pressure oven of claim 7 wherein said liner has a ring of pallets extending horizontally inwardly from a bottom edge thereof for supporting said inner bottom panel, said pallets having sealing rings for sealing a gap between said inner bottom panel and said pallets when said inner bottom panel is in abutment with said pallets.

9. The pressure oven of claim 8 wherein said opposed fixed plates are further provided with first guide rods parallel to said screw and connected to said two slides for guiding said slides, and said pallet is further provided with second guide rods for moving said inner bottom plate therealong for guiding said inner bottom plate.

10. The pressure oven of claim 1, wherein an outer cover is further disposed outside the upper cover, a heat-insulating air layer is formed between the outer cover and the upper cover, the upper cover and the outer cover are respectively provided with top walls and side walls with matched shapes, and the side walls on the front sides of the upper cover and the outer cover are obliquely disposed outwards from the top walls and are provided with visual windows with windows perpendicular to the vision of a user in a matching manner.