A portable delivery insulation box and its insulation method

Abstract

The present invention discloses a portable distribution insulation box and its usage method, which includes a box body. A box cover is provided at the top of the box body. One side of the box body is provided with a connecting hinge, and the box cover is connected to the box body through the connecting hinge. A power interface is provided on one side of the box body. The present invention can connect a contactor and a transformer through a temperature controller to control the operation of cooling components such as cooling fan A to cool the temperature in the refrigerated area. The hot air in the refrigerated area is sent into the control area through cooling fan A and cooling fan B. The inlet fan and the outlet fan cooperate with each other to form an air duct with an inlet and outlet circulation in the control area, thereby avoiding the problem that the existing distribution insulation box does not have a special cooling and refrigeration and heat preservation and heating design, resulting in large internal temperature changes during distribution, causing the transported items to deteriorate and the distribution effect to be unsatisfactory.

Description

Technical Field

[0001] The present invention relates to the technical field of insulation boxes, and in particular to a portable delivery insulation box and an insulation method thereof. Background Art

[0002] Takeout is a very broad term. In the past, it was understood as the delivery service of fast food. However, with the formation and popularization of the convenient and fast "takeout lifestyle" of "immediate need, immediate takeout, immediate use" by the majority of users, now all the delivery goods provided by sellers can be said to be takeout. Such as flowers, mobile phones, cosmetics, pet food and toys, these can all be bought through takeout, which can be said that "everything can be takeout". With the variety of delivered items, the requirements for the transporting delivery box are getting higher and higher. The Chinese patent discloses a takeout delivery box and a delivery system (Publication No.: CN107878939A), which is applicable to include: one or more insulation boxes; the insulation box includes an insulation box body and a box cover; a space for storing food is formed between the inner surface of the insulation box body and the inner surface of the box cover; the outer surface of the box body is a heat-insulating waterproof layer; the inner surface of the box body is a heat-conducting waterproof layer; a cavity for storing water is formed between the inner and outer surfaces of the box body; an inlet for inputting hot water or ice water or ice, which can be sealed, is provided at the upper part of the box body. However, since this delivery insulation box does not have a special design for cooling and refrigerating while keeping warm and heating, during delivery, due to the large temperature change inside, the transported items deteriorate, resulting in an unsatisfactory delivery effect. Therefore, we propose a portable delivery insulation box to solve the above problems. Summary of the Invention

[0003] The purpose of the present invention is to overcome the deficiencies of the current delivery insulation box, which does not have a special design for cooling and refrigerating while keeping warm and heating, and during delivery, due to the large temperature change inside, the transported items deteriorate, resulting in an unsatisfactory delivery effect, and to propose a portable delivery insulation box and an insulation method thereof.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A portable delivery insulation box, comprising a box body, a box cover is provided on the top of the box body, a connecting hinge is provided on one side of the box body, the box cover is connected to the box body through the connecting hinge, a power interface is provided on one side of the box body, a power transmission mechanism is provided in the power interface, an air inlet grille is provided on the side surface of the box body, an installation groove is provided on one side of the air inlet grille, a temperature control mechanism is provided in the installation groove, an air outlet grille is provided on the surface of the box body, a heat preservation layer is provided in the box body, a buffer filling A is provided on one side of the heat preservation layer, a mounting plate is provided on the buffer filling A, a control mechanism is provided on the mounting plate, a buffer filling B is provided on the other side of the heat preservation layer, a hot air through pipe is provided in the buffer filling B, a heat preservation mechanism is provided at the bottom on one side of the buffer filling B, a heat preservation area is provided in the hot air through pipe, a control area is provided on one side of the mounting plate, a protective cover is provided on the top of the control area, and an exchange mechanism is provided in the control area.

[0006] Preferably, the control mechanism includes a transformer installed on the mounting plate. Fastening bolts are provided on both sides of the transformer, and the transformer is connected to the mounting plate through the fastening bolts. A power cord is provided on the transformer, which is convenient for controlling the power input.

[0007] Preferably, the exchange mechanism includes an air inlet fan installed on the inner wall of the control area, an air outlet fan is provided on the inner wall on the other side of the control area, a fixing bracket A and a cooling fan A are installed at one end of the mounting plate, the cooling fan A is installed in the fixing bracket A, a heat sink A is installed between the fixing bracket A and the cooling fan A, the air inlet grille is installed on the surface of the air inlet fan, and the air outlet grille is installed on the surface of the air outlet fan, which is convenient for the exchange of hot air in the refrigerated area.

[0008] Preferably, the temperature control mechanism includes a temperature controller installed in the installation groove. A display screen is provided on the temperature controller, and control buttons are provided at the bottom of the temperature controller, which is convenient for controlling the temperature in the refrigerated area.

[0009] Preferably, the power transmission mechanism includes a power plug A installed in the power interface. A connecting wire is connected to the power plug A, the other end of the connecting wire is connected to a power connector B, and a tie strap is provided on the connecting wire, which is convenient for connecting to the power supply device and preventing the wires from being messy.

[0010] Preferably, a temperature sensor is provided on the heat preservation layer, and an insulating layer is provided on the inner wall of the control area, which is convenient for insulation and temperature measurement.

[0011] Preferably, the power cord is connected to the power interface, and a contactor is provided on one side of the transformer, which is convenient for power control.

[0012] Preferably, the heat preservation mechanism includes a hot air nozzle arranged at the bottom of one side of the buffer filling B. A heating element is arranged on the inner wall of the hot air nozzle. A hot air supply fan is arranged on one side of the heating element. The hot air nozzle is communicated with a hot air pipe and is used for heating and heat preservation in the heat preservation area.

[0013] Preferably, a fixing frame B and a cooling fan B are installed at the other end of the mounting plate. The cooling fan B is installed in the fixing frame B. A heat sink B is installed between the fixing frame B and the cooling fan B. A semiconductor refrigerating sheet is arranged in each of the heat sink A and the heat sink B, which is convenient for cooling in the insulation box.

[0014] A method for using a portable distribution insulation box for heat preservation

[0015] The first step: Install the box body at the tail of the takeaway delivery vehicle through a supporting fixing frame;

[0016] The second step: Insert the power plug A at one end of the connecting wire into the power interface of the box body, and connect the power connector B at the other end of the connecting wire to the battery of the takeaway delivery vehicle or the battery supporting the takeaway delivery vehicle;

[0017] The third step: Turn on the contactor and transformer on the mounting plate, and adjust through the control buttons on the temperature controller to control components such as the heat sink A, the cooling fan A, and the heating element on the mounting plate to perform heat preservation work;

[0018] The fourth step: Display the temperature inside the heat preservation area through the display screen on the temperature controller and perform pre-temperature adjustment before work;

[0019] The fifth step: When refrigerating in the heat preservation area, the hot air in the heat preservation area is sent into the control area through the cooling fan A and the cooling fan B. The air inlet fan and the air outlet fan on the inner wall of the control area work. The air inlet fan and the air outlet fan cooperate with each other to form an inlet and outlet circulating air duct in the control area, and then the hot air transmitted from the heat preservation area is discharged through the air outlet fan;

[0020] The sixth step: When heating in the heat preservation area, the air heated by the heating element in the hot air nozzle is sent into the hot air pipe through the hot air supply fan, so that the heat preservation area is surrounded by hot air pipes for heat preservation in the heat preservation area;

[0021] The seventh step: After the temperature adjustment is completed, open the box cover, and after packaging the food that needs to be delivered with heat preservation, place it in the heat preservation area inside the box body;

[0022] The eighth step: Connect the temperature controller with the temperature sensor, display the temperature of the heat preservation area on the display screen, and set the temperature required in the heat preservation area inside the insulation box during transportation through the control button;

[0023] Step 10: During transportation, the control area and the insulation area are stably maintained by buffer padding A and buffer padding B. After the food is transported to the predetermined position, the box lid is opened through the connecting hinge on one side of the box body, and the food is taken out to complete the thermal insulation distribution of the food.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] 1. Through the combined use of components such as the cooling fan A, the heat sink A, and the thermoelectric cooler, the temperature controller is connected to the contactor and the transformer to control the operation of the cooling components such as the cooling fan A to cool the temperature in the refrigeration area. The hot air in the refrigeration area is sent into the control area through the cooling fan A and the cooling fan B;

[0026] 2. Through the combined use of components such as the air inlet grille, the air inlet fan, and the air outlet fan, the air inlet fan and the air outlet fan cooperate with each other to form an air duct with an inlet and outlet circulation in the control area. Then, the hot air transferred from the refrigeration area is discharged through the air outlet fan. The air inlet grille and the air outlet grille effectively prevent sundries from entering the distribution thermal insulation box;

[0027] 3. Through the combined use of components such as the heating element, the hot air nozzle, and the hot air pipe, when heating work is carried out in the refrigeration area, the air heated by the heating element in the hot air nozzle is sent into the hot air pipe through the hot air delivery fan, so that the refrigeration area is surrounded by hot air pipes for thermal insulation in the refrigeration area.

[0028] By connecting to the battery or battery of the distribution vehicle, the power supply of the thermal insulation box is provided during operation, which is convenient for distribution use and avoids the problem that the thermal insulation box cannot refrigerate during use;

[0029] In summary, the present invention can connect the temperature controller to the contactor and the transformer to control the operation of the cooling components such as the cooling fan A to cool the temperature in the refrigeration area. The hot air in the refrigeration area is sent into the control area through the cooling fan A and the cooling fan B. The air inlet fan and the air outlet fan cooperate with each other to form an air duct with an inlet and outlet circulation in the control area. Then, the hot air transferred from the refrigeration area is discharged through the air outlet fan. The air inlet grille and the air outlet grille effectively prevent sundries from entering the distribution thermal insulation box, improve the working efficiency of the distribution thermal insulation box, and avoid the problem that the existing distribution thermal insulation box has no special design for cooling and refrigeration and at the same time for thermal insulation and heating. During distribution, due to large internal temperature changes, the transported items deteriorate, resulting in an unsatisfactory distribution effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is the overall structure diagram of a portable distribution thermal insulation box and its thermal insulation method proposed by the present invention;

[0031] Figure 2 Front structural diagram of a portable delivery insulation box and its insulation method proposed by the present invention; Figure 3 Cross-sectional structural diagram taken along line A-A of a portable delivery insulation box and its insulation method proposed by the present invention;

[0032] Figure 4 Internal structural diagram with the protective cover opened of a portable delivery insulation box and its insulation method proposed by the present invention; Figure 5 Front partial sectional structural diagram of a portable delivery insulation box and its insulation method proposed by the present invention;

[0033] Figure 6 Enlarged structural diagram at position A of a portable delivery insulation box and its insulation method proposed by the present invention.

[0034] In the figure: 1, box cover; 2, connecting hinge; 3, box body; 4, power interface; 5, power plug A; 6, cable tie; 7, connecting wire; 8, power connector B; 9, installation groove; 10, display screen; 11, temperature controller; 12, control button; 13, air inlet grille; 14, air outlet grille; 15, air inlet fan; 16, insulation layer; 17, control area; 18, air outlet fan; 19, mounting plate; 20, thermal insulation layer; 21, temperature sensor; 22, cooling fan A; 23, heat sink A; 24, fixing frame A; 25, fastening bolt; 26, transformer; 27, thermal insulation area; 28, contactor; 29, cooling fan B; 30, heat sink B; 31, fixing frame B; 32, buffer filling A; 33, protective cover; 34, buffer filling B; 35, hot air duct; 36, heating element; 37, hot air delivery fan; 38, hot air nozzle. Specific embodiments

[0035] In order to make the above objects, features and advantages of the present invention more obvious and understandable, the specific embodiments of the present invention will be described in detail below in conjunction with the embodiments of the specification.

[0036] In the following description, many specific details are set forth in order to fully understand the present invention. However, the present invention may be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the connotation of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0037] Secondly, the so-called "one embodiment" or "embodiment" herein refers to a specific feature, structure or characteristic that may be included in at least one implementation manner of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that excludes other embodiments.

[0038] The raw materials used in the embodiments are all commercially purchased unless otherwise specified.

[0039] Referring to Figure 1-6 , a portable delivery insulation box can be used in the fresh-keeping transportation of takeaway food, the cold-chain transportation of drugs, and the high- and low-temperature transportation of pets. It includes a box body 3 made of EPP material, which has the characteristics of environmental protection, good heat preservation performance, and excellent shock-proof effect. A box cover 1 is provided on the top of the box body 3, and a connecting hinge 2 is provided on one side of the box body 3. The box cover 1 is connected to the box body 3 through the connecting hinge 2, which is convenient for the box cover 1 to be opened on the top of the box body 3. A power interface 4 is provided on one side of the box body 3 for power connection. An air inlet grille 13 is provided on the side of the box body 3, and an air outlet grille 14 is provided on the surface of the box body 3 for the air circulation inside the insulation box. A heat preservation partition layer 20 is provided inside the box body 3. An installation plate 19 is provided on one side of the heat preservation partition layer 20, and a refrigeration area 27 is provided on the other side of the heat preservation partition layer 20 for storing delivery items. A control area 17 is provided on one side of the installation plate 19, and a temperature sensor 21 is provided on the heat preservation partition layer 20. An insulating layer 16 is provided on the inner wall of the control area 17 for insulation between the internal electrical appliances and the box body 3.

[0040] In the present invention, a buffer filling A32 is provided on one side of the heat preservation partition layer 20, and an installation plate 19 is provided on the buffer filling A32. A control mechanism is provided on the installation plate 19. The control mechanism includes a transformer 26 installed on the installation plate 19. Fastening bolts 25 are provided on both sides of the transformer 26. The transformer 26 is connected to the installation plate 19 through the fastening bolts 25. A power cord is provided on the transformer 26, and the power cord is connected to the power interface 4. A contactor 28 is provided on one side of the transformer 26. The model of the contactor 28 is hch8-25z. Through the coordinated use of components such as the transformer 26 and the contactor 28, the safety of the power supply during the use of the delivery box is ensured.

[0041] In the present invention, a protective cover 33 is provided on the top of the control area 17. An exchange mechanism is provided inside the control area 17. The exchange mechanism includes an air inlet fan 15 installed on the inner wall of the control area 17, and an air outlet fan 18 is provided on the inner wall of the other side of the control area 17. An air inlet grille 13 is installed on the surface of the air inlet fan 15, and an air outlet grille 14 is installed on the surface of the air outlet fan 18. One end of the mounting plate 19 is installed with a fixing bracket A24 and a cooling fan A22. The cooling fan A22 is installed inside the fixing bracket A24, and a heat sink A23 is installed between the fixing bracket A24 and the cooling fan A22. The other end of the mounting plate 19 is installed with a fixing bracket B31 and a cooling fan B29. The cooling fan B29 is installed inside the fixing bracket B31, and a heat sink B30 is installed between the fixing bracket B31 and the cooling fan B29. A semiconductor refrigeration sheet is provided in both the heat sink A23 and the heat sink B30. The temperature controller 11 is connected to the contactor 28 and the transformer 26 to control the operation of the cooling components such as the cooling fan A22 to cool the temperature inside the refrigeration area 27. The hot air inside the refrigeration area 27 is sent into the control area 17 through the cooling fan A22 and the cooling fan B29.

[0042] In the present invention, a buffer filling B34 is provided on the other side of the heat insulation layer 20. A hot air pipe 35 is provided inside the buffer filling B34. The bottom of the hot air pipe 35 is spirally arranged at the bottom of the heat preservation area 27, and the upper part of the hot air pipe 35 is vertically arranged around the heat preservation area 27. The articles stored in the heat preservation area 27 are heat-preserved by the hot air sent into the hot air nozzle 38. A heat preservation mechanism is provided at the bottom of one side of the buffer filling B34. The hot air pipe 35 is provided with the heat preservation area 27. The heat preservation mechanism includes a hot air nozzle 38 provided at the bottom of one side of the buffer filling B34. The hot air nozzle 38 is made of an insulating and heat-insulating alloy material, such as ceramic fiber or aluminum alloy-based composite material, to prevent damage to the inside of the box body 3 during heating. A heating element 36 is provided on the inner wall of the hot air nozzle 38. The heating element 36 is a commercially available heating device for a heat preservation box, such as an electric heating pipe or an electric heating wire and other components. A hot air supply fan 37 is provided on one side of the heating element 36. The hot air nozzle 38 is communicated with the hot air pipe 35.

[0043] In the present invention, an installation groove 9 is provided on one side of the air inlet grille 13. A temperature control mechanism is provided in the installation groove 9. The temperature control mechanism includes a temperature controller 11 installed in the installation groove 9. A display screen 10 is provided on the temperature controller 11. Control buttons 12 are provided at the bottom of the temperature controller 11. The model of the temperature controller 11 is XH-3001. The temperature controller 11 is connected to the internal temperature sensor 21 for facilitating temperature detection and control. In the present invention, a power transmission mechanism is provided in the power interface 4. The power transmission mechanism includes a power plug A5 installed in the power interface 4. A connection line 7 is connected to the power plug A5. The other end of the connection line 7 is connected to a power connector B8. A cable tie 6 is provided on the connection line 7. Insert the power plug A5 at one end of the connection line 7 into the power interface 4 of the box body 3, and connect the power connector B8 at the other end of the connection line 7 to the battery of the food delivery vehicle or the battery supporting the food delivery vehicle. The cable tie 6 is used to prevent the wires from being messy. In the present invention, a method for using the portable delivery insulation box for heat preservation is as follows:

[0044] Step 1: Install the box body 3 to the tail of the food delivery vehicle or the transport vehicle through the supporting fixing frame;

[0045] Step 2: Insert the power plug A5 at one end of the connection line 7 into the power interface 4 of the box body 3, and connect the power connector B8 at the other end of the connection line 7 to the battery of the food delivery vehicle or the battery supporting the delivery vehicle;

[0046] Step 3: Turn on the contactor 28 and the transformer 26 on the mounting plate 19, and adjust through the control buttons 12 on the temperature controller 11 to control components such as the heat sink A23, the cooling fan A22, and the heating element 36 on the mounting plate 19 to perform the heat preservation work;

[0047] Step 4: The temperature inside the heat preservation area 27 is displayed on the display screen 10 of the temperature controller 11 for pre-temperature adjustment before work;

[0048] Step 5: When refrigerating in the heat preservation area 27, the hot air in the heat preservation area 27 is sent into the control area 17 through the cooling fan A22 and the cooling fan B29. The air inlet fan 15 and the air outlet fan 18 on the inner wall of the control area 17 work. The air inlet fan 15 and the air outlet fan 18 work in opposite directions, so that an inlet and outlet circulation air duct is formed in the control area 17, and then the hot air transmitted from the heat preservation area 27 is discharged through the air outlet fan 18;

[0049] Step 6: When heating in the heat preservation area 27, the air heated by the heating element 36 in the hot air nozzle 38 is sent into the hot air through pipe 35 through the hot air delivery fan 37, so that the heat preservation area 27 is surrounded by hot air pipes for heat preservation in the heat preservation area 27;

[0050] Step 7: After the temperature adjustment is completed, open the box cover 1, and place the food to be delivered while keeping warm, after packaging, into the heat preservation area 27 inside the box body 3;

[0051] Step 8: Connect the temperature controller 11 with the temperature sensor 21, display the temperature of the heat preservation area 27 on the display screen 10, and set the temperature required in the heat preservation area 27 inside the incubator during transportation through the control button 12;

[0052] Step 10: During transportation, use the buffer filling A32 and buffer filling B34 to stabilize the control area 17 and the heat preservation area 27 through a floating cage design. After transporting the food to the predetermined position, open the box cover 1 through the connecting hinge 2 on one side of the box body 3, take out the food, and complete the heat preservation delivery of the item.

[0053] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the spirit and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A portable delivery insulation box, comprising a box body (3), characterized in that: The top of the box body (3) is provided with a box cover (1). One side of the box body (3) is provided with a connecting hinge (2). The box cover (1) is connected to the box body (3) through the connecting hinge (2). One side of the box body (3) is provided with a power interface (4). A power transmission mechanism is arranged in the power interface (4). An air inlet grille (13) is arranged on the side surface of the box body (3). An installation groove (9) is arranged on one side of the air inlet grille (13). A temperature control mechanism is arranged in the installation groove (9). An air outlet grille (14) is arranged on the surface of the box body (3). A heat preservation layer (20) is arranged in the box body (3). One side of the heat preservation layer (20) is provided with buffer filling A (32). An installation plate (19) is arranged on the buffer filling A (32). A control mechanism is arranged on the installation plate (19). The other side of the heat preservation layer (20) is provided with buffer filling B (34). A hot air through pipe (35) is arranged in the buffer filling B (34). A heat preservation mechanism is arranged at the bottom on one side of the buffer filling B (34). A heat preservation area (27) is arranged in the hot air through pipe (35). A control area (17) is arranged on one side of the installation plate (19). A protective cover (33) is arranged on the top of the control area (17). An exchange mechanism is arranged in the control area (17); The exchange mechanism includes an air inlet fan (15) installed on the inner wall of the control area (17). An air outlet fan (18) is arranged on the inner wall on the other side of the control area (17). One end of the installation plate (19) is installed with a fixed frame A (24) and a cooling fan A (22). The cooling fan A (22) is installed in the fixed frame A (24). A heat sink A (23) is installed between the fixed frame A (24) and the cooling fan A (22). The air inlet grille (13) is installed on the surface of the air inlet fan (15). The air outlet grille (14) is installed on the surface of the air outlet fan (18); The heat preservation mechanism includes a hot air nozzle (38) arranged at the bottom on one side of the buffer filling B (34). A heating element (36) is arranged on the inner wall of the hot air nozzle (38). A hot air delivery fan (37) is arranged on one side of the heating element (36). The hot air nozzle (38) is communicated with the hot air through pipe (35); The other end of the installation plate (19) is installed with a fixed frame B (31) and a cooling fan B (29). The cooling fan B (29) is installed in the fixed frame B (31). A heat sink B (30) is installed between the fixed frame B (31) and the cooling fan B (29). Semiconductor refrigeration chips are arranged in both the heat sink A (23) and the heat sink B (30).

2. The portable delivery insulation box according to claim 1, characterized in that, The control mechanism includes a transformer (26) installed on the installation plate (19). Tightening bolts (25) are arranged on both sides of the transformer (26). The transformer (26) is connected to the installation plate (19) through the tightening bolts (25). A power cord is arranged on the transformer (26).

3. A portable delivery insulation box according to claim 1, characterized in that The temperature control mechanism described above includes a temperature controller (11) installed in the installation groove (9). A display screen (10) is provided on the temperature controller (11), and control buttons (12) are provided at the bottom of the temperature controller (11).

4. A portable delivery insulation box according to claim 1, characterized in that, The power transmission mechanism described above includes a power plug A (5) installed in the power interface (4). A connection line (7) is connected to the power plug A (5), and the other end of the connection line (7) is connected to a power connector B (8). A cable tie (6) is provided on the connection line (7).

5. A portable delivery insulation box according to claim 1, characterized in that, A temperature sensor (21) is provided on the heat insulation layer (20), and an insulating layer (16) is provided on the inner wall of the control area (17).

6. The portable distribution incubator according to claim 2, characterized in that, The power cord is connected to the power interface (4), and a contactor (28) is provided on one side of the transformer (26).

7. A method for using the heat insulation of a portable delivery heat insulation box, characterized in that: The first step: Install the box body (3) to the tail of the food delivery vehicle through a supporting fixed frame. The second step: Insert the power plug A (5) at one end of the connection line (7) into the power interface (4) of the box body (3), and connect the power connector B (8) at the other end of the connection line (7) to the battery of the food delivery vehicle or the battery supporting the food delivery vehicle. The third step: Turn on the contactor (28) and the transformer (26) on the mounting plate (19), and adjust through the control buttons (12) on the temperature controller (11) to control the heat sink A (23), the cooling fan A (22) and the heating element (36) on the mounting plate (19) to perform heat insulation work. The fourth step: The temperature inside the heat insulation area (27) is displayed on the display screen (10) of the temperature controller (11) for pre-temperature adjustment before work. The fifth step: When refrigerating in the heat insulation area (27), the hot air in the heat insulation area (27) is sent into the control area (17) through the cooling fan A (22) and the cooling fan B (29). The air inlet fan (15) and the air outlet fan (18) on the inner wall of the control area (17) work. The air inlet fan (15) and the air outlet fan (18) work in opposite directions, so that an inlet and outlet circulating air duct is formed in the control area (17), and then the hot air transmitted from the heat insulation area (27) is discharged through the air outlet fan (18). The sixth step: When heating in the heat insulation area (27), the air heated by the heating element (36) in the hot air nozzle (38) is sent into the hot air pipe (35) through the hot air supply fan (37), so that the heat insulation area (27) is surrounded by hot air pipes for heat insulation in the heat insulation area (27). The seventh step: After the temperature adjustment is completed, open the box cover (1), and after packaging the food that needs to be delivered with heat insulation, place it in the heat insulation area (27) inside the box body (3). The eighth step: Connect the temperature controller (11) to the temperature sensor (21), display the temperature of the heat insulation area (27) on the display screen (10), and set the temperature required in the heat insulation area (27) inside the heat insulation box during transportation through the control buttons (12). Step 10: During transportation, the control area (17) and the heat preservation area (27) are stably maintained by the buffer padding A (32) and the buffer padding B (34). After the food is transported to the predetermined position, the lid (1) is opened through the connecting hinge (2) on one side of the box body (3), and the food is taken out to complete the heat preservation distribution of the item.

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