Oven and tray circulation method

Abstract

The present invention discloses an oven and a tray circulation method applied to the oven. The oven has a baking area and a cooling area. A tray is provided in the baking area. The baking area includes a first loading area, a first tray ascending area, a first tray descending area, and a first tray unloading area. The baking area is provided with a first tray circulation mechanism. The first tray circulation mechanism includes a first tray transfer mechanism located above the baking area and used to transfer a tray located at the top of the first tray ascending area to the first tray descending area, and a second tray transfer mechanism located below the baking area and used to transfer a tray located in the first tray descending area to the first tray ascending area. The first tray circulation mechanism also includes a first tray lifting mechanism for driving the tray to ascend or descend. The technical solution of the present invention can solve the current problem of an oven occupying too many trays.

Description

Technical Field

[0001] The invention relates to the technical field of baking and heating equipment, in particular to an oven and a material tray circulation method. Background Art

[0002] Currently, industrial ovens used for glass surface processing, baking after film or coating, and baking printed circuit boards are divided into cabinet hot air ovens, tunnel ovens, and flat-plate ovens. Among them, the cabinet hot air oven requires the products to be baked to be placed on trays first. After the trays are neatly stacked, they are transported into the oven for baking by a dedicated tray cart. After baking, they are cooled and taken out after cooling. During the entire process, the products occupy the trays for a long time, requiring a large number of trays and spare trays, and the degree of automation is also low. Therefore, the existing technology needs to be improved. Summary of the Invention

[0003] The main purpose of the present invention is to provide an oven, which aims to solve the problem that a large number of material trays need to be used during the baking process of the current oven.

[0004] To achieve the above-mentioned purpose, the oven proposed in the present invention has a baking area and a cooling area, and a material tray is provided in the baking area, and the baking area includes a first loading area, a first material tray rising area, a first material tray descending area and a first unloading area; the baking area is provided with a first material tray circulation mechanism; the first material tray circulation mechanism includes a first material tray transfer mechanism located above the baking area and used to transfer the material tray located at the top of the first material tray rising area to the first material tray descending area, and a second material tray transfer mechanism located below the baking area and used to transfer the material tray located in the first material tray descending area to the first material tray rising area; the first material tray circulation mechanism also includes a first material tray lifting mechanism for driving the material tray to rise or fall.

[0005] Preferably, the first tray transfer mechanism includes a clamp and a guide rail, the clamp is used to clamp the tray located at the top of the first tray rising area and drive it to move along the guide rail to transfer the clamped tray to the top of the first tray descending area.

[0006] Preferably, the first loading area is located below the first tray rising area, and the first unloading area is located below the first tray descending area; the second tray transfer mechanism is used to transfer the tray located in the first unloading area to the first loading area.

[0007] Preferably, the oven further includes a loading mechanism and a first unloading mechanism; the loading mechanism is used to transport the product to a tray located in the first loading area; the first unloading mechanism is used to take out the product from the tray located in the first unloading area.

[0008] Preferably, the second tray transfer mechanism includes a motor and a conveyor belt, and the second tray transfer mechanism is used to transfer the tray located in the first unloading area to the first loading area.

[0009] Preferably, the frame of the tray is provided with a through hole.

[0010] Preferably, the tray is square, and has bosses at its four corners. When a plurality of trays are stacked, the surfaces of the bosses abut against adjacent trays; and a gap is formed between the frames of two adjacent trays.

[0011] Preferably, a positioning protrusion and a positioning groove are provided on the boss, and when a plurality of the trays are stacked, the positioning protrusions of adjacent trays match the positioning grooves.

[0012] Preferably, the first tray rising area is provided with a first tray supporting mechanism, the first tray supporting mechanism includes a first supporting portion, the first supporting portion is located at the bottom of the first tray rising area to abut and support the tray located at the bottom of the first tray rising area.

[0013] Preferably, the first supporting portion can release the tray.

[0014] Preferably, the first tray lifting mechanism includes a first lifting mechanism located below the first loading area; the first lifting mechanism is used to cooperate with the first support part to lift the tray located in the first loading area to the first tray lifting area and be supported by the first tray support mechanism.

[0015] Preferably, the first tray supporting mechanism further includes a driving mechanism to drive the first supporting portion to move up and down.

[0016] Preferably, the first tray descending area is provided with a second tray supporting mechanism, the second tray supporting mechanism includes a second supporting portion, and the second supporting portion is located at the bottom of the first tray descending area to abut and support the tray located at the bottom of the first tray descending area.

[0017] Preferably, the second supporting portion can release the tray.

[0018] Preferably, the first tray lifting mechanism also includes a second lifting mechanism located below the first unloading area, and the second lifting mechanism is used to cooperate with the second support part to receive and lower the tray located at the bottom of the first tray descending area to the first unloading area.

[0019] Preferably, the second tray supporting mechanism further includes a driving mechanism to drive the second supporting portion to move up and down.

[0020] Preferably, a material tray is provided in the cooling zone; the cooling zone includes a second material loading zone, a second material tray rising zone, a second material tray descending zone and a second material unloading zone; the cooling zone is provided with a second material tray circulation mechanism, and the second material tray circulation mechanism includes a third material tray transfer mechanism, a fourth material tray transfer mechanism and a second material tray lifting mechanism; the third material tray transfer mechanism is located above the cooling zone, and is used to transfer the material tray located at the top of the second material tray rising zone to the second material tray descending zone; the fourth material tray transfer mechanism is located below the cooling zone, and is used to transfer the material tray located in the second material tray descending zone to the second material tray rising zone; the second material tray lifting mechanism is used to drive the material tray to rise or drive the rising material tray to fall.

[0021] Preferably, the lower part of the second tray descending zone is the first cooling zone, the upper part of the first cooling zone is the tray buffer zone, and the first cooling zone and the tray buffer zone are spaced apart.

[0022] Preferably, the second loading zone is located on top of the first cooling zone.

[0023] Preferably, the second tray lowering area is provided with a third tray support mechanism, and the third tray support mechanism includes a third support portion and a fourth support portion; the third support portion is located at the bottom of the tray buffer area, and is used to support the tray located at the bottom of the tray buffer area; the fourth support portion is located at the bottom of the first cooling area, and is used to support the tray located in the first cooling area.

[0024] Preferably, the third tray supporting mechanism further includes a driving mechanism to drive the third supporting portion and / or the fourth supporting portion to move up and down.

[0025] Preferably, the lower end of the second tray rising zone is a second cooling zone, the upper end of the second cooling zone is a tray buffer zone, and the second cooling zone is spaced apart from the tray buffer zone.

[0026] Preferably, the second unloading zone is located at the top of the second cooling zone.

[0027] Preferably, the second tray rising area is provided with a fourth tray support mechanism, and the fourth tray support mechanism includes a fifth support part and a sixth support part; the fifth support part is located at the bottom of the tray buffer area, and is used to support the tray located at the bottom of the tray buffer area; the sixth support part is located at the bottom of the second cooling zone, and is used to support the tray located in the second cooling zone.

[0028] Preferably, the fourth tray supporting mechanism further includes a driving mechanism to drive the fifth supporting portion and / or the sixth supporting portion to move up and down.

[0029] Preferably, the fourth tray transfer mechanism includes a motor and a conveyor belt, and the fourth tray transfer mechanism is used to transfer the tray located at the bottom of the second tray descending zone to the bottom of the second cooling zone.

[0030] Preferably, the cooling zone is also provided with a second unloading mechanism; the first unloading mechanism is used to take out the products in the tray located in the first unloading area and transport them to the tray located in the second loading area, and the second unloading mechanism is used to take out the products in the tray located in the second unloading area.

[0031] Preferably, the second tray lifting mechanism includes a third lifting mechanism located below the second tray descending area; the third lifting mechanism is used to cooperate with the third tray supporting mechanism to lower the tray located at the bottom of the tray buffer area to the second loading area.

[0032] Preferably, the second tray lifting mechanism also includes a fourth lifting mechanism located below the second tray rising area, and the fourth lifting mechanism is used to cooperate with the fourth tray supporting mechanism to lift the tray located in the second tray unloading area to the tray buffer area.

[0033] The present invention also proposes a tray circulation method, the tray circulation method is applied to an oven, the oven has a first loading area, a first tray rising area, a first tray descending area and a first tray unloading area; the oven includes a loading mechanism, a tray, a first tray circulation mechanism, a first tray supporting mechanism, and a second tray supporting mechanism; the first tray circulation mechanism includes a first tray transferring mechanism, a second tray transferring mechanism and a first tray lifting mechanism; the first tray transferring mechanism is used to transfer the trays in the first tray rising area to the first tray descending area; the second tray transferring mechanism is used to transfer the trays in the first unloading area to the first loading area; the first tray supporting mechanism is used to support the trays in the first tray rising area, and the second tray supporting mechanism is used to support the trays in the first tray descending area; the first tray lifting mechanism includes a first lifting mechanism for lifting the trays in the first tray rising area and a second lifting mechanism for lowering the trays in the first tray descending area; the circulation process of a tray includes the following steps:

[0034] Step 1: The loading mechanism transports the product to the tray located in the first loading area;

[0035] Step 2: The first lifting mechanism lifts the tray located in the first loading area to the first tray lifting area;

[0036] Step 3a: The first tray transfer mechanism transfers the tray located at the top of the first tray ascending area to the first tray descending area;

[0037] Step 3b: The second lifting mechanism lowers the tray located in the first tray lowering area to the first unloading area;

[0038] Step 3c: The second tray transfer mechanism transfers the tray located in the first unloading area to the first loading area;

[0039] Step 4: The loading mechanism places the product into the tray located in the first loading area;

[0040] Step 5: Return to step 1;

[0041] In the continuous cycle process, the order of step 3a, step 3b and step 3c can be interchanged;

[0042] After step 3b or before step 3c, the following steps are further included:

[0043] Step 3x: The first unloading mechanism takes out the product in the tray located in the first unloading area.

[0044] Preferably, the step 2 includes:

[0045] Step 2.1: The first lifting mechanism rises from its initial position to lift the tray located in the first loading area so that the tray in the first loading area is in contact with the tray located at the bottom of the first tray lifting area;

[0046] Step 2.2: The first supporting portion releases the tray located at the bottom of the first tray ascending area;

[0047] Step 2.3: The first lifting mechanism supports and lifts the tray of the first loading area, raising it by the thickness of one tray;

[0048] Step 2.4: The support portion of the first tray support mechanism is reset and supports the tray that has risen to the bottom of the first loading area;

[0049] Step 2.5: The first lifting mechanism descends and resets.

[0050] Preferably, step 3b includes:

[0051] Step 3b1: the second lifting mechanism rises and abuts against the material tray located at the bottom of the first material tray descending area;

[0052] Step 3b2: the second supporting portion releases the tray located at the bottom of the first tray descending area;

[0053] Step 3b3: a second lifting mechanism supports the tray in the first tray lowering area and lowers it by the thickness of one tray;

[0054] Step 3b4: the second supporting portion is reset and supports the tray that descends to the bottom of the first tray descending area;

[0055] Step 3b5: The second lifting mechanism is lowered, and the material tray abutting against the second lifting mechanism is lowered to the first unloading area.

[0056] The present invention also proposes another material tray circulation method, which is applied to the cooling zone of the oven, wherein a material tray is provided in the cooling zone, and the cooling zone includes a second material tray rising zone and a second material tray descending zone; the cooling zone also has a second loading zone and a second unloading zone; the lower part of the second material tray descending zone is the first cooling zone, and the lower part of the second material tray rising zone is the second cooling zone; above the first cooling zone is the first material tray buffer zone, and above the second cooling zone is the second material tray buffer zone; the first cooling zone and the first material tray buffer zone are spaced apart, and the second cooling zone and the second material tray buffer zone are spaced apart; the second loading zone is located at the top of the first cooling zone, and the second unloading zone is located at the top of the second cooling zone; the cooling zone is provided with a second material tray circulation mechanism, a third material tray support mechanism and a fourth material tray support mechanism; the third material tray support mechanism has a third support portion and a fourth support portion, the third support portion is used to support the material tray in the first material tray buffer zone, and the fourth support portion is used to The tray is configured to support the material tray in the first cooling zone; the fourth material tray supporting mechanism has a fifth supporting portion and a sixth supporting portion, the fifth supporting portion is used to support the material tray in the second material tray buffer zone, and the sixth supporting portion is used to support the material tray in the second cooling zone; the second material tray circulation mechanism includes a third material tray transferring mechanism, a fourth material tray transferring mechanism and a second material tray lifting mechanism; the third material tray transferring mechanism is used to transfer the material tray located at the top of the second material tray rising zone to the second material tray descending zone, and the fourth material tray transferring mechanism is used to transfer the material tray located at the bottom of the second material tray descending zone to the second material tray rising zone; the second material tray lifting mechanism includes a third jacking mechanism and a fourth jacking mechanism, the third jacking mechanism is located below the second material tray descending zone, and is used to drive the material tray in the second material tray descending zone to rise or fall, and the fourth jacking mechanism is located below the second material tray ascending zone, and is used to drive the material tray in the second material tray ascending zone to rise or fall; a material tray circulation process includes the following steps:

[0057] Step a: The first unloading mechanism transports the product to the tray of the second loading area;

[0058] Step b: The third lifting mechanism lowers the tray located at the bottom of the first cooling zone to the fourth tray transfer mechanism;

[0059] Step c: the fourth tray transfer mechanism transfers the tray to the bottom of the second tray ascending zone;

[0060] Step d: The fourth lifting mechanism lifts the tray located at the bottom of the second tray ascending zone to the bottom of the second cooling zone;

[0061] Step e: The second unloading mechanism takes out the product in the tray located in the second unloading area;

[0062] Step f: The fourth lifting mechanism lifts the tray located at the top of the second cooling zone to the second tray buffer area;

[0063] Step g: The third tray transfer mechanism transfers the tray located at the top of the second tray ascending area to the top of the second tray descending area;

[0064] Step h: The third lifting mechanism lowers the tray located at the bottom of the first tray buffer area to the first cooling zone;

[0065] Step i: Return to step a.

[0066] Preferably, the first cooling zone includes at least two stacked trays, and step b further includes:

[0067] Step b1: the third lifting mechanism rises to abut against and support the material tray located at the bottom of the first cooling zone;

[0068] Step b2: the fourth supporting portion releases the material tray located at the bottom of the first cooling zone;

[0069] Step b3: The third lifting mechanism rises to lift the trays located in the first cooling zone, so that the uppermost tray in the first cooling zone abuts against the tray located at the bottom of the first tray buffer zone;

[0070] Step b4: the third supporting portion releases the tray located at the bottom of the first tray buffer area;

[0071] Step b5: the third lifting mechanism supports the tray in the second tray lowering area to descend by the thickness of one tray;

[0072] Step b6: the third support portion is reset and supports the tray that has descended to the bottom of the first tray buffer area;

[0073] Step b7: the third lifting mechanism descends, and makes the tray at the bottom of the second tray descending zone lower than the thickness of one tray at the bottom of the first cooling zone;

[0074] Step b8: the fourth support portion is reset and supports the material tray that descends to the bottom of the first cooling zone;

[0075] Step b9: the third lifting mechanism descends to place the tray at the bottom of the second tray descending area onto the fourth tray transfer mechanism;

[0076] Step b10: The third lifting mechanism is reset.

[0077] Preferably, the step f further comprises:

[0078] Step f1: the fourth lifting mechanism rises to abut against and support the material tray at the bottom of the second cooling zone;

[0079] Step f2: the sixth supporting portion releases the material tray located at the bottom of the second cooling zone;

[0080] Step f3: The fourth lifting mechanism rises, driving the tray located in the second cooling zone to rise and abut against the tray located at the bottom of the second tray buffer zone;

[0081] Step f4: the fifth supporting portion releases the tray located at the bottom of the second tray buffer area;

[0082] Step f5: The fourth lifting mechanism rises by the thickness of one tray;

[0083] Step f6: the fifth supporting portion is reset and supports the tray that rises to the bottom of the second tray buffer area;

[0084] Step f7: the fourth lifting mechanism descends;

[0085] Step f8: the sixth support portion is reset and supports the material tray that descends to the bottom of the second cooling zone;

[0086] Step f9: The fourth lifting mechanism is reset.

[0087] The technical solution of the present invention improves the utilization rate of the material tray by adopting an internal circulation structure of the material tray, solves the problem that current industrial ovens require a large number of material trays, saves the use of material trays, and improves the production capacity per unit area. Moreover, the material tray circulates in the box, and the material tray itself is always at a high temperature, which can avoid repeated heating of the material tray and save energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0089] Figure 1 This is a schematic diagram of the overall structure of an oven according to an embodiment of the present invention;

[0090] Figure 2 This is a schematic diagram of the internal baking area structure of an oven according to an embodiment of the present invention;

[0091] Figures 3 to 5 In order Figure 2 Partial magnification of areas A, B, and C;

[0092] Figure 6 This is a schematic diagram of the internal cooling zone structure of an oven according to an embodiment of the present invention;

[0093] Figure 7 and Figure 8 They are Figure 6 Partial magnification of the D and E areas;

[0094] Figure 9 This is a schematic diagram of the structure of a material tray in an embodiment of an oven of the present invention;

[0095] Figure 10 Figure 9 A local magnified image of the middle F area;

[0096] Figure 11 This is a schematic diagram of the structure of a material tray in another embodiment of the oven of the present invention;

[0097] Figure 12 for Figure 11 A partial enlarged view of the middle G area.

[0098] Description of Figure Numbers:

[0099] Label name Label name 100 Baking area 231 The first cooling zone 110 First loading area 232 First tray buffer area 120 First unloading area 240 Second tray rising area 130 First tray rising area 241 The second cooling zone 140 First tray lowering area 242 Second tray buffer area 150 First tray transfer mechanism 250 The third tray transfer mechanism 151 Gripper 260 Fourth tray transfer mechanism 152 guide 300 Feed tray 160 Second tray transfer mechanism 310 through-hole 200 Cooling zone 320 boss 210 Second loading area 321 Positioning protrusion 220 Second unloading area 322 Positioning groove 230 Second tray lowering area 400 The third support part

[0100] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0101] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0102] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0103] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features specified as "first" and "second" may explicitly or implicitly include at least one of such features. In addition, the technical solutions between the various embodiments can be combined with each other, but this must be based on the fact that ordinary technicians in this field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0104] Please refer to Figures 1 to 12 The present invention proposes an oven, which has a baking area 100 and a cooling area 200, and a material tray 300 is provided in the baking area 100; the baking area 100 includes a first loading area 110, a first material tray rising area 130, a first material tray descending area 140 and a first unloading area 120.

[0105] The baking area 100 is provided with a first material tray circulation mechanism, which includes a first material tray transfer mechanism 150 and a second material tray transfer mechanism 160; the first material tray transfer mechanism 150 is located above the baking area 100, and is used to transfer the material tray 300 located at the top of the first material tray ascending area 130 to the first material tray descending area 140; the second material tray transfer mechanism 160 is located below the baking area 100, and is used to transfer the material tray 300 in the first material tray descending area 140 to the first material tray ascending area 130, so as to realize the circulation of the material tray 300 from the first loading area 110 back to the first loading area 110.

[0106] In order to complete the circulation process, the first tray circulation mechanism in the present invention further includes a first tray lifting mechanism for driving the tray 300 to rise or fall.

[0107] In one specific embodiment, the first tray ascending area 130 is provided with a first tray support mechanism, which includes a first support portion located at the bottom of the first tray ascending area 130 to support the tray 300 at the bottom of the first tray ascending area 130. The first tray descending area 140 is provided with a second tray support mechanism, which includes a second support portion located at the bottom of the first tray descending area 140 to support the tray 300 at the bottom of the first tray descending area 140. The first loading area 110 is located below the first tray ascending area 130, and the first unloading area 120 is located below the first tray descending area 140.

[0108] The first tray lifting mechanism includes a first lifting mechanism located below the first loading area 110, and a second lifting mechanism located below the first unloading area 120; the first support portion can release the tray 300 when the first lifting mechanism supports the tray 300 in the first tray rising area 130, and the second support portion can release the tray 300 when the second lifting mechanism supports the tray 300 in the first tray descending area 140.

[0109] The first lifting mechanism is used to cooperate with the first supporting part to lift the material tray 300 located in the first loading area 110 to the first material tray ascending area 130, and be supported by the first material tray supporting mechanism; the second lifting mechanism is used to cooperate with the second supporting part to receive and lower the material tray 300 located at the bottom of the first material tray descending area 140 to the first unloading area 120.

[0110] The first tray transfer mechanism 150 includes a clamping jaw 151 and a guide rail 152. The clamping jaw 151 clamps the tray 300 located at the top of the first tray ascending area 130, moves along the guide rail 152, and transfers the clamped tray 300 to the top of the first tray descending area 140, stacking the tray 300 in the first tray descending area 140. The movement of the clamping jaw 151 along the guide rail 152 includes the clamping jaw 151 sliding along the guide rail 152 and the clamping jaw 151 being fixed relative to the guide rail 152 and moving with the guide rail 152.

[0111] The second tray transfer mechanism 160 includes a motor and a conveyor belt, and the conveyor belt drives the tray 300 to transfer from the first unloading area 120 to the first loading area 110. The second tray transfer mechanism 160 also includes a limit block, which is provided at the end of the conveyor belt's travel to limit the position where the tray 300 stops when moving from the first unloading area 120 to the first loading area 110.

[0112] The material tray 300 used in the present invention is square, and the four corners of the material tray 300 are provided with bosses 320. When multiple material trays 300 are stacked, the table top of the boss 320 abuts against the adjacent material trays 300; a gap is formed between the frames of two adjacent material trays 300, and the boss 320 is provided with a positioning protrusion 321 and a positioning groove 322. When multiple material trays 300 are stacked, the positioning protrusions 321 of adjacent material trays 300 match the positioning grooves 322.

[0113] After loading the trays 300 in the first loading area 110, they enter the first tray ascending area 130 and are stacked with the other trays 300 in the first tray ascending area 130. The bosses 320 protrude from the frames of the trays 300, leaving gaps between the frames of adjacent stacked trays 300. Hot air can pass through these gaps to heat and bake the products placed in each tray 300.

[0114] The oven also includes a loading mechanism and a first unloading mechanism; the loading mechanism is used to transport the product to the tray 300 located in the first loading area 110; the first unloading mechanism is used to take out the product in the tray 300 located in the first unloading area 120.

[0115] After the loading mechanism places the product into the tray 300 located in the first loading area 110, the loading tray 300, driven by the first lifting mechanism, enters the first tray ascending area 130. The first tray ascending area 130 serves as the first heating zone, where multiple trays 300 are stacked. During the circulation process, the multiple trays 300 step upward within the first heating zone in units of the thickness of one tray 300. After the loading tray 300 enters the first heating zone, the first tray transfer mechanism 150 transfers the topmost tray 300 in the first tray ascending area 130 to the first tray descending area 140. The first tray descending area 140 serves as the second heating zone, where the trays 300 step downward in units of the thickness of one tray 300.

[0116] After the first tray transfer mechanism 150 transfers a loaded tray 300 from the first tray ascending area 130 to the first tray descending area 140, the second lifting mechanism lifts the tray 300 in the first tray descending area 140 upward and lowers the loaded tray 300 located at the bottom of the first tray descending area 140 to the first unloading area 120. After the first unloading mechanism removes the product from the tray 300 lowered to the first unloading area 120, and if there are no trays 300 in the first loading area 110, the second tray transfer mechanism 160 transfers the empty tray 300 in the first unloading area 120 to the first loading area 110. This completes a cycle of trays 300 returning from the loading area to the loading area.

[0117] After the loading of the tray 300 is completed, the first lifting mechanism lifts up the full tray 300 so that it abuts against the tray 300 at the bottom of the first tray rising area 130, and slightly lifts up the stacked trays 300 in the first tray rising area 130. At this time, the first supporting part releases the tray 300, and the tray 300 in the first tray rising area 130 is supported by the first lifting mechanism. After the first lifting mechanism lifts the tray 300 upward to a height of the thickness of the tray 300, the bottom of the tray 300 just passes the first supporting part. At this time, the first supporting part resets, abuts against the bottom of the tray 300 at the bottom of the first tray rising area 130, and supports the tray 300 in the first tray rising area 130. Afterwards, the first lifting mechanism resets and descends to the bottom of the first loading area 110. It should be noted that when the trays 300 are stacked, the bosses 320 at the four corners of the trays 300 abut against each other, there is a gap between the frames of the trays 300, and the first support portion abuts against the frame portion at the bottom of the tray 300.

[0118] Similarly, after the first tray transfer mechanism 150 transfers a full tray 300 from the first tray ascending area 130 to the first tray descending area 140, the second jacking mechanism rises upward, supports and slightly lifts the tray 300 in the first tray descending area 140; at this time, the second supporting portion is released, and the tray 300 in the first tray descending area 140 is supported by the second jacking mechanism; after the second jacking mechanism descends to a height of the thickness of a tray 300, the second supporting portion is reset and supports the second tray 300 from bottom to top, that is, supports the tray 300 located at the bottom of the first tray descending area 140 at this time; the second jacking mechanism supports a tray 300 to continue to descend, and lowers it to the first unloading area 120, and the second jacking mechanism continues to descend and reset; after the first unloading mechanism takes out the product in the tray 300 lowered to the first unloading area 120, it is transported to the first loading area 110 by the second tray transfer mechanism 160 to complete the cycle.

[0119] In this embodiment, the first loading area 110 is located below the first tray ascending area 130. After loading the tray 300, it begins to circulate upward. The first unloading area 120 is located below the first tray descending area 140. After the tray 300 descends to the unloading area, it unloads the material and circulates back to the first loading area 110. The present invention is not limited to the above embodiment. In other embodiments, the loading and unloading areas can be located elsewhere, for example, at the top and circulate downward, or at the bottom but not at the bottom. For example, if there is a tray 300 below the first loading area 110, the second tray transfer mechanism 160 transfers the empty tray 300 from the first unloading area 120 to the bottom of the first loading area 110.

[0120] In other embodiments, the first tray rising area 130 or the first tray descending area 140 can be designed to stack the trays 300. For example, the first tray descending area 140 does not stack the trays 300. After the first tray transfer mechanism 150 transfers the tray 300 to the first tray descending area 140, the second lifting mechanism directly lowers it to the unloading area.

[0121] Furthermore, when the number of trays 300 in the baking zone 100 is constant, the heights of the first and second support portions are fixed. To enhance the adaptability of the oven and enable it to continue to function properly even when the number of trays 300 participating in the cycle increases or decreases, in one embodiment of the present invention, the first and second tray support mechanisms further include a drive mechanism to drive the first and second support portions to move up and down. For example, if the number of trays 300 participating in the cycle decreases by one, the first or second support portion moves upward by the thickness of one tray 300. This means that the number of trays 300 that can be accommodated within the first tray ascending zone 130 and the first tray descending zone 140 decreases by one, thereby accommodating a decrease in the number of trays 300 due to various reasons.

[0122] At the same time, in order to ensure the consistency of the overall expansion of the material tray 300 after heating, and to avoid the situation where uneven expansion causes deformation of the material tray 300 and thus affects the normal circulation of the material tray 300, the frame part of the material tray 300 used in one embodiment of the present invention is provided with a through hole 310. The through hole 310 can make the structural density of the frame the same as the part that accommodates the product inside, so that the frame part and the part that accommodates the product are consistent in heat expansion.

[0123] A lifting mechanism is required to enable the material tray 300 to rise from the first loading area 110 to the first material tray ascending area 130, and to enable the material tray 300 to descend from the first material tray descending area 140 to the first material tray unloading area 120. The lifting mechanism can take various forms. In other embodiments, a vertical walking arm, a lifting chain, or other similar structures capable of achieving a lifting function can be used.

[0124] The tray 300 of the present invention completes the cycle in the oven. The temperature of the tray 300 itself is relatively stable and is always in a high temperature state. After the product is placed in the tray 300 and enters the heating zone, the energy for heating the tray 300 can be saved, and the product can be directly heated, saving baking time and energy. After the product is placed in the tray 300, it is baked as the tray 300 circulates from the first tray ascending zone 130 to the first tray descending zone 140, and is taken out after circulating to the first unloading zone 120. After the product is taken out, the empty tray 300 is circulated to the first loading zone 110 under the action of the second tray transfer mechanism 160, completing the cycle of the entire process. By adopting this cycle process, the space in the oven can be fully utilized, and the volume of the oven can be reduced under the premise of the same production capacity, saving its floor space. Moreover, during a complete cycle of the material tray 300 in the baking area 100, the loading time of the material tray 300 accounts for a very high proportion, and the material tray 300 is idle only in the process from the first unloading area 120 to the first loading area 110. The extremely high utilization rate of the material tray 300 can directly reduce the demand for the number of material trays 300, which can save a large number of material trays 300 and achieve higher production capacity with fewer material trays 300.

[0125] In order to meet the need for separate cooling after heating and baking, the oven of one embodiment of the present invention further includes a cooling zone 200, in which a material tray 300 is provided, and the material tray 300 of the cooling zone 200 circulates in the cooling zone 200.

[0126] The cooling zone 200 includes a second loading zone 210, a second unloading zone 220, a second tray rising zone 240 and a second tray descending zone 230; the first unloading mechanism transports the product from the tray 300 in the first unloading zone 120 to the tray 300 in the second loading zone 210; the oven also includes a second unloading mechanism, which takes the product out of the tray 300 in the second unloading zone 220.

[0127] The cooling zone 200 is divided into a cooling zone and a tray buffer zone according to its function. The cooling zone and the tray buffer zone are spaced apart, and the cooling zone is located below the tray buffer zone.

[0128] The lower portion of the second tray descending zone 230 is the first cooling zone 231, and the upper portion is the first tray buffer zone 232. The lower portion of the second tray ascending zone 240 is the second cooling zone 241, and the lower portion is the second tray buffer zone 242. The second loading zone 210 is located on top of the first cooling zone 231; the second unloading zone 220 is located on top of the second cooling zone 241.

[0129] The cooling zone 200 is provided with a second tray circulation mechanism, which includes a third tray transfer mechanism 250 and a fourth tray transfer mechanism 260. The third tray transfer mechanism 250 is located above the cooling zone 200 and is used to transfer the trays 300 located at the top of the second tray ascending zone 240 to the top of the second tray descending zone 230. The fourth tray transfer mechanism 260 is located below the cooling zone 200 and is used to transfer the trays 300 located at the bottom of the second tray descending zone 230 to the bottom of the second tray ascending zone 240. The second tray circulation mechanism also includes a second tray lifting mechanism for driving the trays 300 to ascend or descend.

[0130] Specifically, a part of the lower part of the second material tray descending zone 230 is the first cooling zone 231, the top of the first cooling zone 231 is the second loading zone 210, and the top of the first cooling zone 231 is the first material tray buffer zone 232. There is space for the robot to load materials between the first cooling zone 231 and the first material tray buffer zone 232; the third material tray transfer mechanism 250 includes a clamp 151 and a guide rail 152, and the third transfer mechanism is located above the first material tray buffer zone 232, and is used to transfer the material tray 300 in the second buffer zone to the top of the first buffer zone; the fourth material tray transfer mechanism 260 includes a motor and a conveyor belt, and the motor drives the conveyor belt to rotate, and the conveyor belt drives the material tray 300 from the bottom of the first cooling zone 231 to the bottom of the second cooling zone 241.

[0131] The second tray lowering area 230 is provided with a third tray supporting mechanism, and the third tray supporting mechanism includes a third supporting portion 400 and a fourth supporting portion; the third supporting portion 400 is located at the bottom of the first tray buffer area 232 to support the tray 300 located at the bottom of the tray buffer area; the fourth supporting portion is located at the bottom of the first cooling zone 231 to support the tray 300 located at the bottom of the first cooling zone 231.

[0132] The lower end of the second tray ascending zone 240 is the second cooling zone 241, and the top of the second cooling zone 241 is the second unloading zone 220. The second unloading mechanism removes the products from the tray 300 in the second unloading zone 220. Above the second cooling zone 241 is the second tray buffer zone 242, and a gap is provided between the second cooling zone 241 and the second tray buffer zone 242 for the second unloading mechanism to operate. The second tray ascending zone 240 is provided with a fourth tray support mechanism, which includes a fifth support portion. The fifth support portion is located at the bottom of the tray buffer zone to support the tray 300 located therein. The fourth tray support mechanism also includes a sixth support portion located at the bottom of the second cooling zone 241 to support the tray 300 located therein.

[0133] The second tray circulation mechanism also includes a second tray lifting mechanism for driving the trays 300 to ascend or descend. The second tray lifting mechanism includes a third lifting mechanism located below the second tray descending area 230. The third lifting mechanism cooperates with the third tray support mechanism to lower the trays 300 located at the bottom of the tray buffer area to the second loading area 210. The second tray lifting mechanism also includes a fourth lifting mechanism located below the second tray ascending area 240. The fourth lifting mechanism cooperates with the fourth tray support mechanism to lift the trays 300 located in the second unloading area 220 to the tray buffer area.

[0134] In this embodiment, the cooling zone includes a first cooling zone 231 located at the bottom of the second material tray descending zone 230 and a second cooling zone 241 located at the bottom of the second material tray ascending zone 240; the movement process of the material tray 300 in the cooling zone is as follows: the material tray 300 descends in the first cooling zone 231, and after descending to the bottom of the first cooling zone 231, it continues to descend to the fourth material tray transfer mechanism 260 below the first cooling zone 231 under the action of the third jacking mechanism; the material tray 300 is transferred to the bottom of the second cooling zone 241 under the action of the fourth material tray transfer mechanism 260, and is lifted upward under the action of the fourth jacking mechanism and enters the bottom of the second cooling zone 241. After that, it steps up in the second cooling zone 241 in units of the thickness of one material tray 300.

[0135] In other embodiments, the first cooling zone 231 and the second cooling zone 241 can be set selectively; for example, after the material tray 300 leaves the first cooling zone 231 and moves to the second material tray rising zone 240, it is unloaded by the second unloading mechanism and directly enters the second material tray buffer zone 242.

[0136] For a specific material tray 300, the material tray 300 is put into the product after circulating to the second loading area 210; the material tray 300 descends in the first cooling area 231, and after descending to below the first cooling area 231, it circulates to below the second material tray rising area 240 under the action of the fourth material tray transfer mechanism 260; the material tray 300 continues to circulate upward, and after circulating to the second unloading area 220, the second unloading mechanism takes out the product, and the material tray 300 enters the second material tray buffer area 242. When the material tray 300 rises to the top in the second material tray buffer area 242, it circulates to the top of the first material tray buffer area 232 through the action of the third material tray transfer mechanism 250, and descends in the first material tray buffer area 232 until it returns to the second loading area 210, completing a cycle.

[0137] At the beginning of this specific cycle, after the material tray 300 located in the second loading area 210 completes loading, the third lifting mechanism rises and slightly lifts up the material tray 300 located in the first cooling zone 231, and the fourth support portion supporting the first cooling zone 231 releases the material tray 300; the third lifting mechanism continues to rise, so that the material tray 300 in the first cooling zone 231 rises, abuts against the material tray 300 in the first material tray buffer area 232, and slightly lifts it; the third support portion 400 releases the material tray 300; the third lifting mechanism descends to a height of the thickness of a material tray 300, and the third support portion 400 resets and supports the descent to the first material tray buffer area The tray 300 at the bottom of the zone 232 is located at the bottom of the first tray buffer zone 232. The third lifting mechanism continues to descend until the second tray 300 from the bottom to the top in the second tray descending zone 230 is just located above the fourth support portion (at this time, the second tray 300 is located at the bottom of the first cooling zone 231). The fourth support portion resets and supports the tray 300 in the first cooling zone 231 (at this time, the tray 300 at the top of the first cooling zone 231 is the tray 300 at the bottom of the original first tray buffer zone 232). The third lifting mechanism continues to descend, and lowers the tray 300 abutting the third lifting mechanism to the fourth tray transfer mechanism 260. The fourth tray transfer mechanism 260 The tray 300 is moved to the bottom of the second tray rising area 240; the fourth lifting mechanism rises to lift the tray 300 transferred by the fourth tray transferring mechanism 260, so that it abuts and supports the tray 300 located at the bottom of the second cooling area 241; the sixth supporting portion is released; the fourth lifting mechanism continues to rise until the top of the tray 300 located in the second cooling area 241 abuts and supports the tray 300 at the bottom of the second tray buffer area 242; the fifth supporting portion releases the tray 300; the fourth lifting mechanism continues to rise to a height of the thickness of the tray 300, and the fifth supporting portion clamps the tray 300 and rises to the second tray buffer area 242 at this time The tray 300 at the bottom (the tray 300 originally located at the top of the second cooling zone 241); the fourth lifting mechanism descends, and the tray 300 descends accordingly, and the sixth support part is reset, supporting the tray 300 descending to the second cooling zone 241 (compared to before the fourth lifting mechanism was activated, the second cooling zone 241 has one more tray 300 added to the bottom, and one less tray 300 at the top, and the total number of trays 300 in the second cooling zone 241 remains unchanged); the fourth lifting mechanism continues to descend and reset; at the same time, the third tray transfer mechanism 250 transfers the tray 300 located at the top of the second tray ascending zone 240 to the top of the second tray descending zone 230. After the third lifting mechanism lowers the tray 300 in the buffer area to the first cooling zone 231, the first unloading mechanism transfers the products in the tray 300 in the first unloading zone 120 to the tray 300 in the second loading zone 210 (the tray 300 at the top of the first cooling zone 231).

[0138] Furthermore, when the number of trays 300 in the cooling zone 200 is constant, the heights of the third support portion 400, the fourth support portion, the fifth support portion, and the sixth support portion are fixed. To enhance the adaptability of the oven and enable it to function normally even when the number of trays 300 participating in the cooling cycle increases or decreases, in one embodiment of the present invention, the third tray support mechanism and / or the fourth tray support mechanism further include a drive mechanism to drive the third support portion 400, the fourth support portion, the fifth support portion, or the sixth support portion to move up and down. For example, when the number of trays 300 participating in the cooling cycle decreases by one, one of the third support portion 400, the fourth support portion, the fifth support portion, or the sixth support portion moves upward by the thickness of one tray 300, i.e., the number of trays 300 that can be accommodated in the second tray ascending zone 240 and the second tray descending zone 230 decreases by one. This drive mechanism allows the oven to maintain a normal cooling cycle even when the number of trays 300 participating in the cooling cycle in the cooling zone 200 changes.

[0139] The present invention also proposes a tray circulation method for an oven, which can be applied to industrial ovens and other ovens; the oven has a first loading area 110, a first tray rising area 130, a first tray descending area 140 and a first unloading area 120; the oven includes a loading mechanism, a tray 300, a first tray circulation mechanism, a first tray supporting mechanism, and a second tray supporting mechanism; the first tray circulation mechanism includes a first tray transfer mechanism 150, a second tray transfer mechanism 160 and a first tray lifting mechanism; the first tray transfer mechanism 150 is used to lift the first tray up and down The tray 300 in the first tray ascending area 130 is transferred to the first tray descending area 140; the second tray transfer mechanism 160 is used to transfer the tray 300 in the first tray unloading area 120 to the first tray loading area 110; the first tray support mechanism is used to support the tray 300 in the first tray ascending area 130, and the second tray support mechanism is used to support the tray 300 in the first tray descending area 140; the first tray lifting mechanism includes a first lifting mechanism for lifting the tray 300 in the first tray ascending area 130 and a second lifting mechanism for lowering the tray 300 in the first tray descending area 140; the circulation process of a tray includes:

[0140] Step 1: The loading mechanism transports the product to the tray 300 located in the first loading area 110;

[0141] Step 2: The first lifting mechanism lifts the tray 300 located in the first loading area 110 to the first tray lifting area 130;

[0142] Step 3a: The first tray transfer mechanism 150 transfers the tray 300 located at the top of the first tray ascending area 130 to the first tray descending area 140;

[0143] Step 3b: The second lifting mechanism lowers the tray 300 located at the bottom of the first tray lowering area 140 to the first unloading area 120;

[0144] Step 3c: The second tray transfer mechanism 160 transfers the tray 300 located in the first unloading area 120 to the first loading area 110 ;

[0145] Step 4: The loading mechanism places the product into the material tray 300 located in the first loading area 110;

[0146] Step 5: Return to step 1;

[0147] In the continuous cycle process, the order of step 3a, step 3b and step 3c can be interchanged;

[0148] After step 3b or before step 3c, the following steps are further included:

[0149] Step 3x: The first unloading mechanism takes out the product in the tray 300 located in the first unloading area 120 .

[0150] Wherein, step 1 further includes:

[0151] Step 1.1: The first lifting mechanism rises from its initial position to lift the tray 300 located in the first loading area 110 so that the tray 300 in the first loading area 110 is in contact with the tray 300 located at the bottom of the first tray lifting area 130;

[0152] Step 1.2: The first supporting portion releases the material tray 300 located at the bottom of the first material tray ascending area 130;

[0153] Step 1.3: The first lifting mechanism supports and lifts the tray 300 in the first loading area 110 , raising it by the thickness of the tray 300 ;

[0154] Step 1.4: The support portion of the first tray support mechanism clamps the tray 300 raised to the bottom of the first loading area 110;

[0155] Step 1.5: The first lifting mechanism descends and resets.

[0156] The step 3b further comprises:

[0157] Step 3b1: the second lifting mechanism rises and abuts against the material tray 300 located at the bottom of the first material tray descending area 140;

[0158] Step 3b2: the second supporting portion releases the material tray 300 located at the bottom of the first material tray descending area 140;

[0159] Step 3b3: The second lifting mechanism supports the tray 300 in the first tray lowering area 140 and lowers it by the thickness of one tray 300;

[0160] Step 3b4: The second supporting portion clamps the material tray 300 that descends to the bottom of the first material tray descending area 140;

[0161] Step 3b5: the second lifting mechanism descends, and lowers the material tray 300 abutting against the second lifting mechanism to the first unloading area 120 .

[0162] The tray circulation method can be applied to both the heating zone and the cooling zone 200 of the oven.

[0163] In addition, the present invention also proposes a tray circulation method suitable for the cooling zone 200 of the oven, wherein a tray 300 is provided in the cooling zone 200, and the cooling zone 200 includes a second tray rising zone 240 and a second tray descending zone 230; the cooling zone 200 also has a second loading zone 210 and a second unloading zone 220; the lower part of the second tray descending zone 230 is a first cooling zone 231, and the lower part of the second tray ascending zone 240 is a second cooling zone 241; above the first cooling zone 231 is a first tray buffer zone 232, and above the second cooling zone 241 is a second tray buffer zone 233. The first material tray buffer area 242; the first cooling zone 231 and the first material tray buffer area 232 are spaced apart, and the second cooling zone 241 and the second material tray buffer area 242 are spaced apart; the second loading area 210 is located at the top of the first cooling zone 231, and the second unloading area 220 is located at the top of the second cooling zone 241; the cooling zone 200 is provided with a second material tray circulation mechanism, a third material tray support mechanism and a fourth material tray support mechanism; the third material tray support mechanism has a third support portion 400 and a fourth support portion, and the third support portion 400 is used to support the first material tray buffer area 23 2, the fourth supporting portion is used to support the tray 300 in the first cooling zone 231; the fourth tray supporting mechanism has a fifth supporting portion and a sixth supporting portion, the fifth supporting portion is used to support the tray 300 in the second tray buffer area 242, and the sixth supporting portion is used to support the tray 300 in the second cooling zone 241; the second tray circulation mechanism includes a third tray transfer mechanism 250, a fourth tray transfer mechanism 260 and a second tray lifting mechanism; the third tray transfer mechanism 250 is used to transfer the tray 300 located at the top of the second tray rising area 240 to the third tray The second tray descending area 230, the fourth tray transfer mechanism 260 is used to transfer the tray 300 located at the bottom of the second tray descending area 230 to the second tray ascending area 240; the second tray lifting mechanism includes a third jacking mechanism and a fourth jacking mechanism, the third jacking mechanism is located below the second tray descending area 230, and is used to drive the tray 300 in the second tray descending area 230 to rise or fall, and the fourth jacking mechanism is located below the second tray ascending area 240, and is used to drive the tray 300 in the second tray ascending area 240 to rise or fall; the circulation process of one tray includes:

[0164] Step a: The first unloading mechanism transports the product to the second tray descending area 230 and into the tray 300 in the second loading area;

[0165] Step b: The third lifting mechanism lowers the tray 300 located at the bottom of the first cooling zone 231 to the fourth tray transfer mechanism 260;

[0166] Step c: The fourth tray transfer mechanism 260 transfers the tray 300 to the bottom of the second tray ascending area 240 ;

[0167] Step d: The fourth lifting mechanism lifts the tray 300 located at the bottom of the second tray ascending zone 240 to the bottom of the second cooling zone 241;

[0168] Step e: The second unloading mechanism takes out the product in the tray 300 located at the top of the second cooling zone 241;

[0169] Step f: The fourth lifting mechanism lifts the material tray 300 located at the top of the second cooling zone 241 to the second material tray buffer area 242;

[0170] Step g: The third tray transfer mechanism 250 transfers the tray 300 located at the top of the second tray ascending area 240 to the top of the second tray descending area 230;

[0171] Step h: The third lifting mechanism lowers the tray 300 located at the bottom of the first tray buffer area 232 to the first cooling area 231;

[0172] Step i: Return to step a.

[0173] Wherein, the step b further comprises:

[0174] Step b1: the third lifting mechanism rises to abut against and support the material tray 300 located at the bottom of the first cooling zone 231;

[0175] Step b2: the fourth supporting portion releases the material tray 300 located at the bottom of the first cooling zone 231;

[0176] Step b3: The third lifting mechanism rises to lift the tray 300 located in the first cooling zone 231 so that the tray 300 at the top of the first cooling zone abuts against the tray 300 at the bottom of the first tray buffer zone 232;

[0177] Step b4: the third supporting portion 400 releases the material tray 300 located at the bottom of the first material tray buffer area 232;

[0178] Step b5: The third lifting mechanism supports the tray 300 in the second tray lowering area 230 to descend by the thickness of one tray 300;

[0179] Step b6: The third support portion 400 clamps the material tray 300 that descends to the bottom of the material tray buffer area;

[0180] Step b7: the third lifting mechanism descends, and makes the tray 300 at the bottom of the second tray descending zone 230 lower than the thickness of one tray 300 at the bottom of the first cooling zone 231;

[0181] Step b8: The fourth supporting portion clamps the material tray 300 that descends to the bottom of the first cooling zone 231;

[0182] Step b9: The third lifting mechanism descends to lower the tray 300 located at the bottom of the second tray descending area 230 to the fourth tray transfer mechanism 260;

[0183] Step b10: The third lifting mechanism is reset.

[0184] Wherein, the step f further comprises:

[0185] Step f1: the fourth lifting mechanism rises to abut against and support the material tray 300 located at the bottom of the second material tray lifting area 240;

[0186] Step f2: the sixth supporting portion releases the material tray 300 located at the bottom of the second cooling zone 241;

[0187] Step f3: The fourth lifting mechanism rises, driving the tray 300 located in the second cooling zone 241 to rise and abut against the tray 300 located at the bottom of the second tray buffer zone 242;

[0188] Step f4: the fifth supporting portion releases the material tray 300 located at the bottom of the second material tray buffer area 242;

[0189] Step f5: The fourth lifting mechanism rises by the thickness of a tray 300;

[0190] Step f6: The fifth supporting portion clamps the tray 300 that rises to the bottom of the second tray buffer area 242 ;

[0191] Step f7: the fourth lifting mechanism descends to lower the material tray 300 located at the bottom of the second material tray ascending zone 240 to the bottom of the second cooling zone 241;

[0192] Step f8: The sixth supporting portion clamps the material tray 300 that descends to the bottom of the second cooling zone 241 ;

[0193] Step f9: The fourth lifting mechanism is reset.

[0194] The above description is only a preferred embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made by using the contents of the present invention description and drawings under the inventive concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. An oven having a baking area and a cooling area, characterized in that: A material tray is provided in the baking area; The baking area includes a first loading area, a first tray ascending area, a first tray descending area and a first unloading area; The baking area is provided with a first tray circulation mechanism; the first tray circulation mechanism includes a first tray transfer mechanism located above the baking area and used to transfer trays located at the top of the first tray ascending area to the first tray descending area, and a second tray transfer mechanism located below the baking area and used to transfer trays located in the first tray descending area to the first tray ascending area. The first tray circulation mechanism further includes a first tray lifting mechanism for driving the tray to rise or fall; The first loading area is located below the first tray ascending area, and the first unloading area is located below the first tray descending area; The products in the tray are transferred to the cooling zone in the first unloading zone.

2. The oven according to claim 1, wherein The first tray transfer mechanism includes a clamp and a guide rail. The clamp is used to clamp the tray located at the top of the first tray rising area and drive it to move along the guide rail to transfer the clamped tray to the top of the first tray descending area.

3. The oven according to claim 1, wherein The second tray transfer mechanism is used to transfer the tray located in the first unloading area to the first loading area.

4. The oven according to claim 1, wherein The oven also includes a loading mechanism and a first unloading mechanism; the loading mechanism is used to transport the product to the tray located in the first loading area; the first unloading mechanism is used to take out the product from the tray located in the first unloading area.

5. The oven according to claim 1, wherein The second tray transfer mechanism includes a motor and a conveyor belt, and the second tray transfer mechanism is used to transfer the tray located in the first unloading area to the first loading area.

6. The oven according to claim 1, wherein The frame of the material tray is provided with a through hole.

7. The oven according to claim 1, wherein The material tray is square in shape, and has bosses at its four corners. When a plurality of the material trays are stacked, the surfaces of the bosses abut against adjacent material trays; a gap is formed between the frames of two adjacent material trays.

8. The oven according to claim 7, characterized in that The boss is provided with a positioning protrusion and a positioning groove. When a plurality of the trays are stacked, the positioning protrusions of adjacent trays match the positioning grooves.

9. The oven according to claim 1, wherein: The first tray rising area is provided with a first tray supporting mechanism, which includes a first supporting portion. The first supporting portion is located at the bottom of the first tray rising area to abut and support the tray located at the bottom of the first tray rising area.

10. The oven according to claim 9, characterized in that The first support portion can release the tray.

11. The oven according to claim 10, characterized in that The first tray lifting mechanism includes a first lifting mechanism located below the first loading area; the first lifting mechanism is used to cooperate with the first support part to lift the tray located in the first loading area to the first tray lifting area and be supported by the first tray support mechanism.

12. The oven according to claim 11, wherein The first tray supporting mechanism further includes a driving mechanism to drive the first supporting portion to move up and down.

13. The oven according to claim 1, wherein The first tray descending area is provided with a second tray support mechanism, and the second tray support mechanism includes a second support portion, which is located at the bottom of the first tray descending area to abut and support the tray located at the bottom of the first tray descending area.

14. The oven according to claim 13, wherein The second supporting portion can release the tray.

15. The oven according to claim 14, characterized in that The first tray lifting mechanism also includes a second lifting mechanism located below the first unloading area, and the second lifting mechanism is used to cooperate with the second support part to receive and lower the tray located at the bottom of the first tray descending area to the first unloading area.

16. The oven according to claim 14, wherein The second tray supporting mechanism further includes a driving mechanism to drive the second supporting portion to move up and down.

17. The oven according to claim 1, wherein A material tray is provided in the cooling zone; The cooling zone includes a second loading zone, a second tray ascending zone, a second tray descending zone and a second unloading zone; The cooling zone is provided with a second tray circulation mechanism, which includes a third tray transfer mechanism, a fourth tray transfer mechanism and a second tray lifting mechanism; The third tray transfer mechanism is located above the cooling zone, and is used to transfer the tray located at the top of the second tray rising zone to the second tray descending zone; the fourth tray transfer mechanism is located below the cooling zone, and is used to transfer the tray located in the second tray descending zone to the second tray rising zone; the second tray lifting mechanism is used to drive the tray to rise or drive the rising tray to descend.

18. The oven according to claim 17, wherein The lower part of the second material tray descending zone is the first cooling zone, the upper part of the first cooling zone is the material tray buffer zone, and the first cooling zone is spaced apart from the material tray buffer zone.

19. The oven according to claim 18, characterized in that The second loading zone is located on the top of the first cooling zone.

20. The oven according to claim 19, wherein The second tray descending area is provided with a third tray supporting mechanism, and the third tray supporting mechanism includes a third supporting portion and a fourth supporting portion; the third supporting portion is located at the bottom of the tray buffer area, and is used to support the tray located at the bottom of the tray buffer area; The fourth supporting portion is located at the bottom of the first cooling zone and is used to support the material tray located in the first cooling zone.

21. The oven according to claim 20, characterized in that The third tray supporting mechanism further includes a driving mechanism to drive the third supporting portion and / or the fourth supporting portion to move up and down.

22. The oven according to claim 17, wherein The lower end of the second material tray rising zone is a second cooling zone, and the upper end of the second cooling zone is a material tray buffer zone. The second cooling zone is spaced apart from the material tray buffer zone.

23. The oven according to claim 22, characterized in that The second unloading zone is located at the top of the second cooling zone.

24. The oven according to claim 23, wherein The second tray rising area is provided with a fourth tray supporting mechanism, and the fourth tray supporting mechanism includes a fifth supporting portion and a sixth supporting portion; the fifth supporting portion is located at the bottom of the tray buffer area, and is used to support the tray located at the bottom of the tray buffer area; The sixth supporting portion is located at the bottom of the second cooling zone, and is used to support the material tray located in the second cooling zone.

25. The oven according to claim 24, characterized in that The fourth tray supporting mechanism further includes a driving mechanism to drive the fifth supporting portion and / or the sixth supporting portion to move up and down.

26. The oven according to claim 24, wherein The fourth tray transfer mechanism includes a motor and a conveyor belt, and the fourth tray transfer mechanism is used to transfer the tray located at the bottom of the second tray descending zone to the bottom of the second cooling zone.

27. The oven according to claim 17, wherein The oven also includes a first unloading mechanism, and the cooling zone is also provided with a second unloading mechanism; the first unloading mechanism is used to take out the products in the tray located in the first unloading area and transport them to the tray located in the second loading area, and the second unloading mechanism is used to take out the products in the tray located in the second unloading area.

28. The oven according to claim 18, wherein The second tray lowering area is provided with a third tray supporting mechanism, and the second tray lifting mechanism includes a third lifting mechanism located below the second tray lowering area; the third lifting mechanism is used to cooperate with the third tray supporting mechanism to lower the tray located at the bottom of the tray buffer area to the second loading area.

29. The oven according to claim 17, wherein The second tray rising area is provided with a fourth tray supporting mechanism, and the second tray lifting mechanism also includes a fourth lifting mechanism located below the second tray rising area, and the fourth lifting mechanism is used to cooperate with the fourth tray supporting mechanism to lift the tray located in the second tray unloading area to the tray buffer area.

30. A tray circulation method, applied to an oven, the oven comprising a baking area and a cooling area, the baking area comprising a first loading area, a first tray ascending area, a first tray descending area, and a first tray unloading area; the oven comprising a loading mechanism, a tray, a first tray circulation mechanism, a first tray support mechanism, and a second tray support mechanism; the first tray circulation mechanism comprising a first tray transfer mechanism, a second tray transfer mechanism, and a first tray lifting mechanism; The first tray transfer mechanism is used to transfer the trays in the first tray ascending area to the first tray descending area; the second tray transfer mechanism is used to transfer the trays in the first tray unloading area to the first tray loading area; the first tray support mechanism is used to support the trays in the first tray ascending area, and the second tray support mechanism is used to support the trays in the first tray descending area; the first tray lifting mechanism includes a first lifting mechanism for lifting the trays in the first tray ascending area and a second lifting mechanism for lowering the trays in the first tray descending area; the products in the trays are transferred from the first tray unloading area to the cooling area; It is characterized in that The circulation process of a tray includes the following steps: Step 1: The loading mechanism transports the product to the tray located in the first loading area; Step 2: The first lifting mechanism lifts the tray located in the first loading area to the first tray lifting area; Step 3a: The first tray transfer mechanism transfers the tray located at the top of the first tray ascending area to the first tray descending area; Step 3b: The second lifting mechanism lowers the tray located in the first tray lowering area to the first unloading area; Step 3c: The second tray transfer mechanism transfers the tray located in the first unloading area to the first loading area; Step 4: The loading mechanism places the product into the tray located in the first loading area; Step 5: Return to step 1; In the continuous cycle process, the order of step 3a, step 3b and step 3c can be interchanged; After step 3b or before step 3c, the following steps are further included: Step 3x: The first unloading mechanism takes out the product in the tray located in the first unloading area.

31. The tray circulation method according to claim 30, wherein: The step 2 includes: Step 2.1: The first lifting mechanism rises from its initial position to lift the tray located in the first loading area so that the tray in the first loading area is in contact with the tray located at the bottom of the first tray lifting area; Step 2.2: The first supporting portion releases the tray located at the bottom of the first tray ascending area; Step 2.3: The first lifting mechanism supports and lifts the tray of the first loading area, raising it by the thickness of one tray; Step 2.4: The support portion of the first tray support mechanism is reset and supports the tray that has risen to the bottom of the first loading area; Step 2.5: The first lifting mechanism descends and resets.

32. The tray circulation method according to claim 30, wherein: The step 3b comprises: Step 3b1: the second lifting mechanism rises and abuts against the material tray located at the bottom of the first material tray descending area; Step 3b2: the second supporting portion releases the tray located at the bottom of the first tray descending area; Step 3b3: a second lifting mechanism supports the tray in the first tray lowering area and lowers it by the thickness of one tray; Step 3b4: the second supporting portion is reset and supports the tray that descends to the bottom of the first tray descending area; Step 3b5: The second lifting mechanism is lowered, and the material tray abutting against the second lifting mechanism is lowered to the first unloading area.

33. A tray circulation method for the oven according to claim 1, specifically applied to the cooling zone, wherein a tray is provided in the cooling zone, the cooling zone comprising a second tray ascending zone and a second tray descending zone; the cooling zone further comprising a second tray loading zone and a second tray unloading zone; The lower part of the second tray descending zone is the first cooling zone, and the lower part of the second tray ascending zone is the second cooling zone; the first tray buffer zone is above the first cooling zone, and the second tray buffer zone is above the second cooling zone; the first cooling zone and the first tray buffer zone are spaced apart, and the second cooling zone and the second tray buffer zone are spaced apart; the second loading zone is located at the top of the first cooling zone, and the second unloading zone is located at the top of the second cooling zone; The cooling zone is provided with a second tray circulation mechanism, a third tray support mechanism and a fourth tray support mechanism; The third tray support mechanism comprises a third support portion and a fourth support portion, the third support portion being used to support the trays in the first tray buffer area, and the fourth support portion being used to support the trays in the first cooling area; The fourth tray support mechanism has a fifth support portion and a sixth support portion, the fifth support portion is used to support the trays in the second tray buffer area, and the sixth support portion is used to support the trays in the second cooling area; The second tray circulation mechanism includes a third tray transfer mechanism, a fourth tray transfer mechanism and a second tray lifting mechanism; The third tray transfer mechanism is used to transfer the tray located at the top of the second tray ascending area to the second tray descending area, and the fourth tray transfer mechanism is used to transfer the tray located at the bottom of the second tray descending area to the second tray ascending area; the second tray lifting mechanism includes a third jacking mechanism and a fourth jacking mechanism, the third jacking mechanism is located below the second tray descending area, and is used to drive the trays in the second tray descending area to rise or fall, and the fourth jacking mechanism is located below the second tray ascending area, and is used to drive the trays in the second tray ascending area to rise or fall; It is characterized in that the circulation process of a tray includes the following steps: Step a: The first unloading mechanism transports the product to the tray of the second loading area; Step b: The third lifting mechanism lowers the tray located at the bottom of the first cooling zone to the fourth tray transfer mechanism; Step c: the fourth tray transfer mechanism transfers the tray to the bottom of the second tray ascending zone; Step d: The fourth lifting mechanism lifts the tray located at the bottom of the second tray ascending zone to the bottom of the second cooling zone; Step e: The second unloading mechanism takes out the product in the tray located in the second unloading area; Step f: The fourth lifting mechanism lifts the tray located at the top of the second cooling zone to the second tray buffer area; Step g: The third tray transfer mechanism transfers the tray located at the top of the second tray ascending area to the top of the second tray descending area; Step h: The third lifting mechanism lowers the tray located at the bottom of the first tray buffer area to the first cooling zone; Step i: Return to step a.

34. The tray circulation method according to claim 33, wherein: The first cooling zone includes at least two stacked trays, and step b further includes: Step b1: the third lifting mechanism rises to abut against and support the material tray located at the bottom of the first cooling zone; Step b2: the fourth supporting portion releases the material tray located at the bottom of the first cooling zone; Step b3: The third lifting mechanism rises to lift the trays located in the first cooling zone, so that the uppermost tray in the first cooling zone abuts against the tray located at the bottom of the first tray buffer zone; Step b4: the third supporting portion releases the tray located at the bottom of the first tray buffer area; Step b5: the third lifting mechanism supports the tray in the second tray lowering area to descend by the thickness of one tray; Step b6: the third support portion is reset and supports the tray that has descended to the bottom of the first tray buffer area; Step b7: the third lifting mechanism descends, and makes the tray at the bottom of the second tray descending zone lower than the thickness of one tray at the bottom of the first cooling zone; Step b8: the fourth support portion is reset and supports the material tray that descends to the bottom of the first cooling zone; Step b9: the third lifting mechanism descends to place the tray at the bottom of the second tray descending area onto the fourth tray transfer mechanism; Step b10: The third lifting mechanism is reset.

35. The tray circulation method according to claim 33, wherein: The step f further comprises: Step f1: the fourth lifting mechanism rises to abut against and support the material tray at the bottom of the second cooling zone; Step f2: the sixth supporting portion releases the material tray located at the bottom of the second cooling zone; Step f3: The fourth lifting mechanism rises, driving the tray located in the second cooling zone to rise and abut against the tray located at the bottom of the second tray buffer zone; Step f4: the fifth supporting portion releases the tray located at the bottom of the second tray buffer area; Step f5: The fourth lifting mechanism rises by the thickness of one tray; Step f6: the fifth supporting portion is reset and supports the tray that rises to the bottom of the second tray buffer area; Step f7: the fourth lifting mechanism descends; Step f8: the sixth support portion is reset and supports the material tray that descends to the bottom of the second cooling zone; Step f9: The fourth lifting mechanism is reset.

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