Heating tray assembly and fast food heating equipment using same

Abstract

The invention relates to the technical field of heating equipment, and provides a heating tray assembly and fast food heating equipment using the same. Comprising a bottom plate and an air outlet plate, and a heat flow channel is formed between the bottom plate and the air outlet plate; a plurality of transverse air outlet holes and a plurality of vertical air outlet holes are formed in the air outlet plate; a bending part is formed on one side of the bottom plate in the direction far away from the air outlet plate, and a heat insulation plate is arranged between the bottom plate forming the bending part and the air outlet plate; the starting end of the heat insulation plate is attached to the starting end of the bent part, and the tail end of the heat insulation plate is attached to the tail end of the bent part. And an air flow inlet is formed between the heat insulation plate and the air outlet plate. The heating tray assembly has the beneficial effects that heat brought by hot air entering the heating tray assembly can heat food on the upper portion through the bottom plate and can also flow out through the air outlet plate to heat food below the heating tray assembly, the food is evenly heated, the food is evenly heated from the upper direction and the lower direction, and the heating efficiency is high.

Description

Technical Field

[0001] The invention relates to the technical field of heating equipment, and in particular to a heating tray assembly and fast food heating equipment using the same. Background Art

[0002] When working and doing activities outdoors, eating is inevitable. Eating hot food in the wild can help replenish energy and improve work motivation. At present, self-heating food, cassette stoves, steamers, microwave ovens, air fryers, etc. can be used to heat food. Self-heating food heats food by adding water to the self-heating bag and releasing heat, but this type of food does not taste good. The cassette stove heats by burning butane and other gases, which is an open flame heating. It may cause a fire when used in the mountains and forests, and the cassette stove has a small heating capacity and is not suitable for heating a large amount of food. Steamers usually use steam generators to provide heat for heating food, but it is necessary to pay attention to water replenishment at any time to prevent dry burning and other situations. A large amount of water is needed in the wild, and it is inconvenient to use in winter because the water freezes. Microwave ovens are suitable for heating foods with a high moisture content. The taste of food becomes dry after heating. Once the microwave leaks, it is more harmful. The heating power of air fryers is mostly between 1 kW and 2 kW. When used in the wild, the power consumption is large and it is not suitable to meet the power requirements. Therefore, a fast food heating device without open flames suitable for outdoor use is needed, which can heat a large amount of food, and is particularly necessary for solving the problem of outdoor heating food and making hot food.

[0003] In the prior art, the structural design of the heating tray is unreasonable, resulting in poor hot air flow and poor food heating efficiency. In view of this, the present invention is proposed. Summary of the invention

[0004] The object of the present invention is to provide a heating tray assembly and a fast food heating device using the same, so as to solve the technical problems existing in the prior art.

[0005] To achieve the above object, the technical solution adopted by the present invention is: a heating tray assembly, comprising: a bottom plate and an air outlet plate, a heat flow channel is formed between the bottom plate and the air outlet plate; the air outlet plate is provided with a plurality of horizontal air outlet holes and a plurality of vertical air outlet holes;

[0006] A bending portion is formed on one side of the bottom plate in a direction away from the air outlet plate, and a heat insulation plate is arranged between the bottom plate and the air outlet plate where the bending portion is formed;

[0007] The starting end of the heat insulation board is in contact with the starting end of the bending portion, and the ending end of the heat insulation board is in contact with the ending end of the bending portion;

[0008] An air flow inlet is formed between the heat insulation plate and the air outlet plate.

[0009] In an optional embodiment, a plurality of circular holes are further provided on the edge of the bottom plate.

[0010] In an optional embodiment, an air insulation layer is formed between the bent portion and the insulation board.

[0011] In an optional embodiment, two support plates are further provided between the bottom plate and the air outlet plate.

[0012] In an optional embodiment, the lateral air outlet includes a first lateral air outlet and a second lateral air outlet, the first lateral air outlet and the second lateral air outlet are located on different straight lines, the second lateral air outlet is closer to the end of the air outlet plate than the first lateral air outlet, and the number of the first lateral air outlet is less than the number of the second lateral air outlet.

[0013] In an optional embodiment, the plurality of vertical air outlet holes are arranged in a horizontal linear arrangement; the plurality of vertical air outlet holes are close to the starting end of the air outlet plate and close to the air flow inlet.

[0014] On the other hand, the present invention further provides a fast food heating device, comprising: using the heating tray assembly as described above.

[0015] In an optional embodiment, it includes: a box assembly, a heating chamber assembly and a hot air blower assembly are arranged in the box assembly, and a plurality of heating tray assemblies are arranged up and down in the heating chamber assembly;

[0016] The air outlet in the hot air blower assembly is connected to the air inlet of each heating tray assembly through a diverter plate assembly; the air outlet of each heating tray assembly is arranged downward, and the hot air flowing out through the air outlet is collected into the return air duct after passing through the space between two adjacent heating tray assemblies.

[0017] The beneficial effects of the present invention are:

[0018] (1) In the heating tray assembly, the heat brought by the hot air entering the heating tray assembly can heat the food on the upper part through the bottom plate, and can also flow out through the air outlet plate to heat the food below it, so that the food is heated evenly, and the food is evenly heated from both the upper and lower directions, with high heating efficiency.

[0019] (2) In the heating tray assembly, hot air flows from the multiple vertical air outlet holes on the air outlet plate of the heating tray assembly toward the second horizontal air outlet hole, so that the hot air can flow out both horizontally and vertically, so that the food is heated evenly; especially after a portion of the hot air flows out from the multiple vertical air outlet holes, the hot air flowing out through the first horizontal air outlet hole is less than the hot air flowing out through the second horizontal air outlet hole, and the temperature of the hot air flowing out through the first horizontal air outlet hole is slightly higher than the temperature of the hot air flowing out through the second horizontal air outlet hole, ensuring that the hot air carries enough heat when it flows to the end of the air outlet plate, so that the food on the bottom plate of the heating tray located below it can be heated evenly.

[0020] (3) In the heating tray assembly, an air insulation layer is formed by arranging a bending portion and an insulation board. The air insulation layer can absorb part of the heat carried by the hot air, thereby avoiding excessively high local temperature near the air inlet of the heating tray assembly and ensuring that the food is heated evenly. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. 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 these drawings without paying creative work.

[0022] Figure 1 This is a schematic diagram of the overall structure of a fast food heating device provided in one embodiment of the present invention.

[0023] Figure 2 A left side view of a fast food heating device provided in one embodiment of the present invention.

[0024] Figure 3 A right side view of a fast food heating device provided in one embodiment of the present invention.

[0025] Figure 4 for Figure 3 AA section view.

[0026] Figure 5 for Figure 4 Middle BB section view.

[0027] Figure 6 A bottom view of a heating tray in a fast food heating device provided in one embodiment of the present invention.

[0028] Figure 7 for Figure 6 CC section view.

[0029] Figure 8 A front view of a hot air blower housing in a fast food heating device provided in one embodiment of the present invention.

[0030] Fig. 9 A front view of a hot air blower housing in a fast food heating device provided by an embodiment of the present invention.

[0031] Fig.10 for Fig. 9 Middle DD section view.

[0032] Fig.11 A front view of a diverter plate assembly in a fast food heating device provided in one embodiment of the present invention.

[0033] Fig.12 for Fig.11EE section view.

[0034] Fig.13 for Fig.11 FF section view.

[0035] Fig.14 A top view of an air inlet adjustment assembly in a fast food heating device provided in one embodiment of the present invention.

[0036] Fig.15 for Fig.14 Middle GG section view.

[0037] Fig.16 A front view of an air inlet adjustment assembly in a fast food heating device provided in one embodiment of the present invention.

[0038] Fig.17 A front view of an air regulating duct in an air inlet regulating assembly provided in one embodiment of the present invention.

[0039] Fig.18 A top view of an air regulating duct in an air inlet regulating assembly provided in one embodiment of the present invention.

[0040] Fig.19 for Fig.18 HH section view.

[0041] Among them, the accompanying drawings are marked as follows:

[0042] 1-box assembly; 2-heating chamber assembly, 21-left heating chamber, 22-right heating chamber;

[0043] 3- inner hot air blower assembly, 31- hot air blower housing, 32- hot air outlet, 33- heat conduction plate, 34- heat insulation plate, 35- return channel, 351- air flow inlet, 352- air flow outlet, 353- seal, 36- air inlet, bottom shell 37;

[0044] 4-external heat blower assembly; 5-oil tank assembly;

[0045] 6-left heating tray assembly, 61-bottom plate, 611-circular hole, 612-edge, 613-bending portion, 62-air outlet plate, 621-vertical air outlet hole, 622-first horizontal air outlet hole, 623-second horizontal air outlet hole, 63-insulation plate, 64-support plate, 65-air inlet;

[0046] 7-right heating tray assembly; 8-box cover assembly; 9-return air duct;

[0047] 10-left manifold assembly, 101-back plate, 102-left frame, 103-right frame, 104-manifold A, 105-baffle A, 106-manifold B, 107-baffle B, 108-manifold C, 109-baffle C, 1010-manifold D, 1011-baffle D, 1012-manifold E, 1013-baffle E, 1014-manifold F, 1015-baffle F, 1016-manifold G, 1017-baffle G, 1018-manifold H, 1019-baffle H, 1020-manifold I, 1021-baffle I, 1022-manifold J, 1023-baffle J, 1 024-air inlet A, 1025-air inlet B, 1026-air inlet C, 1027-air inlet D, 1028-air inlet E, 1029-air inlet F, 1030-air inlet G, 1031-air inlet H, 1032-air inlet I, 1033-air inlet J, 1034-air outlet A, 1035-air outlet B, 1036-air outlet C, 1037-air outlet D, 1038-air outlet E, 1039-air outlet F, 1040-air outlet G, 1041-air outlet H, 1042-air outlet I, 1043-air outlet J, 1044-main air inlet, 1045-straight plate portion, 1046-inclined plate portion;

[0048] 11-right manifold assembly;

[0049] 12-air inlet adjustment component, 121-lower shell, 1211-lower shell bottom plate, 1212-air outlet, 1213-circular opening, 1214-lower shell top plate, 1215-cold air inlet; 122-upper shell, 1221-hot air inlet, 123-bracket; 124-telescopic motor; 125-guide rod, 126-V-shaped frame; 127-air regulating duct, 1271-circular sealing plate, 1272-air guide tube, 1273-air guide outlet. DETAILED DESCRIPTION

[0050] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0051] It should be noted that when a component is referred to as being "fixed on" or "disposed on" another component, it may be directly or indirectly located on the other component. When a component is referred to as being "connected to" another component, it may be directly or indirectly connected to the other component. The directions or positions indicated by the terms "upper", "lower", "left", "right", "front", "back", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. are based on the directions or positions shown in the accompanying drawings and are only for the convenience of description and cannot be understood as limitations on the present technical solution. The terms "first" and "second" are only used for the convenience of description and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features. "Multiple" means two or more, and "several" means any number including one, unless otherwise clearly and specifically defined.

[0052] Embodiment 1

[0053] Please refer to the attached Figure 6-7 The purpose of this embodiment is to provide a heating tray assembly. The heating tray assembly has two types, namely, a left heating tray assembly 6 and a right heating tray assembly 7. Taking the left heating tray assembly 6 as an example, the heating tray assembly includes a bottom plate 61 and an air outlet plate 62. When multiple left heating tray assemblies 6 are overlapped in the left heating chamber assembly 21, the bottom plates 61 of the heating tray assemblies are all arranged upward and the air outlet plates 62 are arranged downward. It should be noted that the air outlet plate 62 is provided with multiple transverse air outlet holes and multiple vertical air outlet holes 621. The transverse air outlet holes include a first transverse air outlet hole 622 and a second transverse air outlet hole 623. The multiple vertical air outlet holes 621 are arranged in a transverse linear manner. The number and size of the vertical air outlet holes 621 can be set according to the size of the air outlet plate 62. The first transverse air outlet hole 622 and the second transverse air outlet hole 623 are located on different straight lines. The second transverse air outlet hole 623 is closer to the end of the air outlet plate 62. The number of the first transverse air outlet holes 622 is less than the number of the second transverse air outlet holes 623. Since the left heating tray assembly 6 is closed except for the above-mentioned air outlet positions and the air inlet 65, the hot air flows from the multiple vertical air outlet holes 621 in the direction of the second horizontal air outlet hole 623, so that the hot air can flow out both horizontally and vertically, so that the food is heated evenly; especially after a part of the hot air flows out from the multiple vertical air outlet holes 621, the hot air flowing out through the first horizontal air outlet holes 622 is less than the hot air flowing out through the second horizontal air outlet holes 623, and the temperature of the hot air flowing out through the first horizontal air outlet holes 622 is slightly higher than the temperature of the hot air flowing out through the second horizontal air outlet holes 623, which ensures that the hot air carries enough heat when it flows to the end of the air outlet plate 62, so that the food on the bottom plate 61 of the heating tray assembly located below it can be heated more evenly.

[0054] A bending portion 613 is formed on one side of the bottom plate 61 in a direction away from the air outlet plate 62, and a heat insulation plate 63 is arranged between the bottom plate 61 and the air outlet plate 62 where the bending portion 613 is formed; the beginning of the heat insulation plate 63 fits the beginning of the bending portion 613, and the end of the heat insulation plate 63 fits the end of the bending portion 613, so that an air insulation layer is formed between the bending portion 613 and the heat insulation plate 63. In an optional embodiment, in order to support the bending portion 613, two support plates 64 are further arranged between the bottom plate 61 and the air outlet plate 62. An airflow inlet, i.e., an air inlet 65, is formed between the heat insulation plate 63 and the air outlet plate 62. When the hot air in the left diverter plate assembly 10 enters a left heating tray assembly 6 through the corresponding air inlet 65, the hot air temperature at the place where it passes through the heat insulation plate 63 is the highest, and the air insulation layer can absorb part of the heat carried by the hot air, thereby avoiding excessively high local temperature of the left heating tray assembly 6, and making the food on the bottom plate 61 heated evenly. In an optional embodiment, in order to reduce the weight of the left heating tray assembly 6, a plurality of circular holes 611 are further provided on the edge 612 of the bottom plate 61. It should be noted that the heat brought by the hot air entering the left heating tray assembly 6 can heat the food on the upper portion through the bottom plate 61, and can also flow out through the air outlet plate 62 to heat the food below it, so that the food is heated evenly, and the food is evenly heated from both the upper and lower directions, with high heating efficiency.

[0055] Embodiment 2

[0056] Please refer to the attached Figure 1-19 The purpose of this embodiment is to provide a fast food heating device, using the heating tray assembly in the first embodiment, including: a box assembly 1, the upper part of the box assembly 1 is a heating chamber assembly 2, a left heating chamber 21 and a right heating chamber 22 are arranged in the heating chamber assembly 2, and a return air duct 9 is arranged between the left heating chamber 21 and the right heating chamber 22, and the left side of the left heating chamber 21 is a left diverter plate assembly 10, and the right side of the right heating chamber 22 is a right diverter plate assembly 11. Multiple left heating tray assemblies 6 are arranged in the upper and lower parts of the left heating chamber 21, and multiple right heating tray assemblies 7 are arranged in the upper and lower parts of the right heating chamber 22. The number of air inlets of the left and right diverter plate assemblies is equal to the number of their air outlets, and is equal to the number of heating tray assemblies in the left heating chamber 21 and the right heating chamber 22. The lower part of the box assembly 1 is provided with an inner hot air blower assembly 3 and an outer hot air blower assembly 4, and the inner hot air blower assembly 3 and the outer hot air blower assembly 4 are symmetrical structures.

[0057] In this embodiment, see the attached Figure 5, the left heating tray assembly 6 and the right heating tray assembly 7 are symmetrical structures. The number of the left heating tray assembly 6 and the number of the right heating tray assembly 7 are both 10. It should be noted that a plurality of circulation holes can be opened on the side wall of the left heating chamber 21 close to the return air duct 9, and the circulation holes are located between adjacent heating tray assemblies 6 and between the heating tray assembly 6 and the bottom wall of the left heating chamber 21, so that the hot air flowing out after passing through the left heating tray assembly 6 can enter the return air duct 9. The right heating chamber 22 adopts the same structure, and the hot air flowing out after passing through the heating tray assembly 7 can enter the return air duct 9.

[0058] Furthermore, the manifold assembly is provided with a plurality of air outlets, and the hot air flow rate per unit time of each air outlet of the manifold assembly is equal; the number of air outlets of the manifold assembly is equal to the number of heating tray assemblies, and each air outlet of the manifold assembly is connected to an air inlet 65 of the heating tray assembly. In this embodiment, the left manifold assembly 10 and the right manifold assembly 11 are symmetrical structures. Take the left manifold assembly 10 as an example, see the attached Figure 11-13 The left diverter plate assembly 10 includes a back plate 101, a left frame 102 and a right frame 103. The thickness of the left frame 102 and the right frame 103 is h. A main air inlet 1044 is formed at the bottom of the left diverter plate assembly 10. The main air inlet 1044 of the left diverter plate assembly 10 is connected to the hot air outlet 32 ​​of the inner hot air blower assembly 3.

[0059] The left diverter plate assembly 10 is provided with diverter plate A104, baffle plate A105, diverter plate B106, baffle plate B107, diverter plate C108, baffle plate C109, diverter plate D1010, baffle plate D1011, diverter plate E1012, baffle plate E1013, diverter plate F1014, baffle plate F1015, diverter plate G1016, baffle plate G1017, diverter plate H1018, baffle plate H1019, diverter plate I1020, baffle plate I1021, diverter plate J1022 and baffle plate J1023 in sequence from bottom to top. The above diverter plates and baffles all have a vertically arranged straight plate portion and an inclined plate portion, and an obtuse angle is formed between the straight plate portion and the inclined plate portion. Taking the diverter plate J1022 as an example, the straight plate portion of the diverter plate J1022 is 1045, and the inclined plate portion is 1046, and so on, which will not be repeated. From the diverter plate A104 to the diverter plate J1022, the height of the inclined plate portion in each diverter plate gradually increases, and the height of the inclined plate portion in the diverter plate J1022 is less than the height of the inclined plate portion in the baffle plate J1023.

[0060] In this embodiment, the end of the straight plate portion of the diverter plate A104 is welded to the beginning of the straight plate portion of the baffle plate A105 and the two straight plate portions are flush, the end of the straight plate portion of the diverter plate B106 is welded to the beginning of the straight plate portion of the baffle plate B107 and the two straight plate portions are flush; an air inlet A1024 is formed between the end of the straight plate portion of the baffle plate A105 and the beginning of the straight plate portion of the diverter plate B106, and an air outlet A1034 is formed between the end of the inclined plate portion of the baffle plate A105 and the end of the inclined plate portion of the diverter plate B106; the end of the straight plate portion of the diverter plate C108 is welded to the beginning of the straight plate portion of the baffle plate C109 and the two straight plate portions are flush, the end of the straight plate portion of the baffle plate B107 is welded to the beginning of the straight plate portion of the diverter plate C108 An air inlet B1025 is formed between the end of the inclined plate part of the baffle B107 and the end of the inclined plate part of the diverter C108; an air outlet B1035 is formed between the end of the straight plate part of the diverter D1010 and the beginning of the straight plate part of the baffle D1011, and the two straight plate parts are flush with each other; an air inlet C1026 is formed between the end of the straight plate part of the baffle C109 and the beginning of the straight plate part of the diverter D1010, and an air outlet C1036 is formed between the end of the inclined plate part of the baffle C109 and the end of the inclined plate part of the diverter D1010; the end of the straight plate part of the diverter E1012 is welded to the beginning of the straight plate part of the baffle E1013, and the two straight plate parts are flush with each other; An air inlet D1027 is formed between the end of the plate portion and the beginning of the straight plate portion of the diverter E1012, and an air outlet D1037 is formed between the end of the inclined plate portion of the baffle D1011 and the end of the inclined plate portion of the diverter E1012; the end of the straight plate portion of the diverter F1014 is welded to the beginning of the straight plate portion of the baffle F1015 and the two straight plate portions are flush, an air inlet E1028 is formed between the end of the straight plate portion of the baffle E1013 and the beginning of the straight plate portion of the diverter F1014, and an air outlet E1038 is formed between the end of the inclined plate portion of the baffle E1013 and the end of the inclined plate portion of the diverter F1014; the end of the straight plate portion of the diverter G1016 is welded to the beginning of the straight plate portion of the baffle G1017 The beginning of the straight plate portion is welded and the two straight plate portions are flush, an air inlet F1029 is formed between the end of the straight plate portion of the baffle F1015 and the beginning of the straight plate portion of the diverter G1016, and an air outlet F1039 is formed between the end of the inclined plate portion of the baffle F1015 and the end of the inclined plate portion of the diverter G1016; the end of the straight plate portion of the diverter H1018 is welded to the beginning of the straight plate portion of the baffle H1019 and the two straight plate portions are flush, an air inlet G1030 is formed between the end of the straight plate portion of the baffle G1017 and the beginning of the straight plate portion of the diverter H1018, and an air outlet F1040 is formed between the end of the inclined plate portion of the baffle G1017 and the end of the inclined plate portion of the diverter H1018;The end of the straight plate of the diverter plate I1020 is welded to the beginning of the straight plate of the baffle plate I1021 and the two straight plate parts are flush with each other. An air inlet H1031 is formed between the end of the straight plate of the baffle plate H1019 and the beginning of the straight plate of the diverter plate I1020. An air outlet H1041 is formed between the end of the inclined plate of the baffle plate H1019 and the end of the inclined plate of the diverter plate I1020. An air inlet I1032 is formed between the beginning of the straight plate portion of the plate J1022, and an air outlet I1041 is formed between the end of the inclined plate portion of the baffle plate I1021 and the end of the inclined plate portion of the diverter plate J1022; an air inlet J1033 is formed between the beginning of the straight plate portion of the diverter plate J1022 and the back plate 101, and an air outlet J1043 is formed between the end of the inclined plate portion of the diverter plate J1022 and the end of the inclined plate portion of the baffle plate J1023. ;

[0061] It should be noted that the distances between the manifold A104, manifold B106, manifold C108, manifold D1010, manifold E1012, manifold F1014, manifold G1016, manifold H1018, manifold I1020 and the back plate 101 gradually decrease, wherein the distance between the manifold A104 and the back plate 101 is Fig.12 The left frame 102 and the right frame 103 of the middle left splitter plate assembly 10 are 9 / 10 of the thickness h. Similarly, the distance between the splitter plate B106 and the back plate 101 is Fig.12 The left frame 102 and the right frame 103 of the middle left manifold assembly 10 are 8 / 10 of the thickness h of the manifold I1020 and the back plate 101. Fig.12 The left frame 102 and the right frame 103 of the middle left manifold assembly 10 are 2 / 10 of the thickness h, and the distance between the manifold J1022 and the baffle I1021 and the distance between the manifold J1022 and the back plate 101 are both attached. Fig.12 The left frame 102 and the right frame 103 of the middle left manifold assembly 10 are 1 / 10 of the thickness h. Through the above structural arrangement, the hot air flow rate of the hot air outlet 32 ​​of the inner hot air blower assembly 3 entering each air inlet and flowing out of each air outlet in the left manifold assembly 10 per unit time is equal, and the opening area (equal length and width) of each air inlet and outlet is equal, so that each left heating tray assembly 6 is heated evenly.

[0062] Furthermore, the hot air in the return air duct 9 enters the return duct outside the hot air blower housing in the hot air blower assembly, and the hot air is transferred to the hot air blower assembly. The hot air blower assemblies are respectively an inner hot air blower assembly 3 and an outer hot air blower assembly 4; the inner hot air blower assembly 3 is connected to a plurality of left heating tray assemblies 6 in the left heating chamber 21 through a left manifold assembly 10; the outer hot air blower assembly 4 is connected to a plurality of right heating tray assemblies 7 in the right heating chamber 22 through a right manifold assembly 11.

[0063] Take the internal heat blower assembly 3 as an example, see the attached Figure 8-10 The hot air blower housing 31 of the hot air blower assembly 3 is provided with an air inlet 36 and a hot air outlet 32. The hot air outlet 32 ​​is connected to a hot air outflow channel located in the hot air blower housing 31 and attached to the bottom shell 37 of the hot air blower housing 31. The outside of the bottom shell 37 is attached to a return channel 35. A heat conducting plate 33 is provided between the bottom shell 37 and the return channel 35. When the hot air flows through the return channel 35, the heat that is not fully utilized in the hot air is transferred to the hot air outflow channel again through the heat conducting plate 33, providing the hot air in the hot air outflow channel with additional heat in addition to the heating of the hot air blower. The outside of the return channel 35 is wrapped with a heat insulation plate 34 to prevent heat loss. The attachment area between the hot air outflow channel and the bottom shell 37 is roughly equal to the attachment area between the return channel 35 and the bottom shell 37, and the attachment area is roughly equal to the area of ​​the heat conducting plate 33.

[0064] The return channel 35 has an air flow inlet 351, an air flow outlet 352 and a seal 353. The air flow inlet 351 is connected to the outlet end of the return air channel 9 to introduce the heated hot air into the return channel 35; the air flow outlet 352 is located at the end of the return channel 35, and the air flow outlet 352 penetrates the bottom shell 37 of the hot air blower housing 31 to introduce the hot air into the hot air inlet 1221 in the air inlet regulating component 12 at the air inlet 36 of the hot air blower housing 31 through the pipeline inside the hot air blower housing 31, and the seal 353 can also be opened to directly discharge the hot air.

[0065] In this embodiment, an air inlet regulating assembly 12 is installed at the air inlet 36 of the inner hot air blower assembly 3 and the outer hot air blower assembly 4. The hot air inlet and the cold air inlet of the air inlet regulating assembly 12 can be connected to the air outlet of the air inlet regulating assembly respectively; the hot air inlet of the air inlet regulating assembly 12 can be connected to the return channel 35.

[0066] See attached Figure 14-19The air inlet adjustment component 12 includes a lower shell 121, an upper shell 122 and an air adjustment duct 127. An air outlet 1212 is arranged at the center of the lower shell bottom plate 1211 of the lower shell 121, a circular opening 1213 is arranged at the center of the lower shell top plate 1214 of the lower shell 121, and a cold air inlet 1215 is arranged on the side wall of the lower shell 122. A hot air inlet 1221 is provided on the side wall of the upper shell 122. A telescopic motor 124 is fixedly installed on the top of the upper shell 122 through a bracket 123. The telescopic part of the telescopic motor 124 extends into the air inlet adjustment assembly 12. The telescopic part is connected to the circular sealing plate 1271 of the air regulating pipe 127 through a V-shaped frame 126. The air regulating pipe 127 also includes an air guide tube 1272 fixedly connected to the circular sealing plate 1271, wherein an air guide port 1273 is provided at the center of the circular sealing plate 1271. The outer diameter of the circular sealing plate 1271 is larger than the diameter of the circular opening 1213 of the lower shell top plate 1214, and the diameter of the air guide tube 1272 is larger than the diameter of the air outlet 1212. A guide rod 125 is provided on the top of the circular sealing plate 1271, and the guide rod 125 moves up and down along the guide hole of the upper shell 122.

[0067] When the outdoor temperature is low, the seal 353 of the return channel 35 outside the hot air blower housing 31 in the hot air blower assembly is closed, and the heated hot air returning through the airflow outlet 352 of the return channel 35 and the pipeline inside the hot air blower housing 31 is introduced into the hot air inlet 1221 of the air inlet adjustment assembly 12, and then the hot air is transferred to the air inlet 36 of the hot air blower housing 31, and heated again by the hot air blower assembly. At this time, the telescopic part of the telescopic motor 124 is in an extended state, the circular sealing plate 1271 of the air regulating pipe 127 fits the lower shell top plate 1214 of the lower shell 121, and the end of the air guide tube 1272 fits the lower shell bottom plate 1211 of the lower shell 121, and the hot air enters the upper shell 122 from the hot air inlet 1221, and then enters the hot air blower assembly through the air guide 1273, the air guide tube 1272, and the air outlet 1212 for heating. When the outdoor temperature is high, the seal 353 of the return duct 35 outside the hot blower shell 31 in the hot blower assembly is opened to discharge the hot air directly. At this time, the telescopic part of the telescopic motor 124 is in a retracted state, and the circular sealing plate 1271 of the air regulating duct 127 fits the upper shell top plate of the upper shell 122, and the outer surface of the side wall of the air guide tube 1272 fits the edge of the circular opening 1213 of the lower shell top plate 1214 of the lower shell 121. The outdoor wind enters the lower shell 121 through the cold air inlet 1215 and then enters the hot blower assembly through the air outlet 1212 for heating.

[0068] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heating tray assembly, characterized in that: include: A bottom plate and an air outlet plate, wherein a heat flow channel is formed between the bottom plate and the air outlet plate; The air outlet plate is provided with a plurality of horizontal air outlet holes and a plurality of vertical air outlet holes; A bending portion is formed on one side of the bottom plate in a direction away from the air outlet plate, and a heat insulation plate is arranged between the bottom plate and the air outlet plate where the bending portion is formed; The starting end of the heat insulation board is in contact with the starting end of the bending portion, and the ending end of the heat insulation board is in contact with the ending end of the bending portion; An air flow inlet is formed between the heat insulation plate and the air outlet plate.

2. The heating tray assembly according to claim 1, characterized in that: A plurality of circular holes are also arranged on the edge of the bottom plate.

3. The heating tray assembly according to claim 1, characterized in that: An air insulation layer is formed between the bent portion and the insulation board.

4. The heating tray assembly according to claim 1, characterized in that: Two supporting plates are also arranged between the bottom plate and the air outlet plate.

5. The heating tray assembly according to claim 1, characterized in that: The lateral air outlet includes a first lateral air outlet and a second lateral air outlet, the first lateral air outlet and the second lateral air outlet are located on different straight lines, the second lateral air outlet is closer to the end of the air outlet plate than the first lateral air outlet, and the number of the first lateral air outlet is less than the number of the second lateral air outlet.

6. The heating tray assembly according to claim 1, characterized in that: The plurality of vertical air outlet holes are arranged in a horizontal linear manner; the plurality of vertical air outlet holes are close to the starting end of the air outlet plate and close to the air flow inlet.

7. A fast food heating device, characterized in that: include: Use the heating tray assembly as described in any one of claims 1 to 6.

8. The fast food heating device according to claim 7, characterized in that: include: A box assembly (1), wherein a heating chamber assembly (2) and a hot air blower assembly are arranged in the box assembly (1), and a plurality of heating tray assemblies are arranged up and down in the heating chamber assembly (2); The air outlet in the hot air blower assembly is connected to the air inlet of each heating tray assembly through a diverter plate assembly; the air outlet of each heating tray assembly is arranged downward, and the hot air flowing out through the air outlet passes through the space between two adjacent heating tray assemblies and then converges into the return air duct (9).

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