Combination structure of motor vehicle and refrigerating and heating device
By combining the structure of the refrigerator and vortex tube on the motor vehicle, the problem that the existing delivery box cannot effectively adjust the temperature is solved, and the dual effects of preserving food freshness and the comfortable environment for delivery personnel during the delivery process are achieved.
Patent Information
- Application Number
- CN202421694804.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-06-20
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The existing delivery box structure lacks effective temperature regulation capabilities, cannot maintain the freshness and safety of food during the delivery process, and cannot adapt to the comfort needs of delivery personnel under different weather conditions.
Design a combined structure between a motor vehicle and a heat refrigerator, including setting up a storage box under the seat cushion of the motor vehicle, and providing cold or hot air with a vortex tube or a heat refrigerator to achieve cooling or insulation effect. The structure also includes setting up a cooled storage box and a hot storage box inside the storage box, and meeting the temperature requirements of different items through a combination of a cooler and a vortex tube.
It effectively maintains the freshness and safety of food during the delivery process, provides a comfortable driving environment that adapts to different weather conditions, and can realize refrigeration, insulation and drying functions on motor vehicles, improving the convenience of use and the freshness effect of food.
Smart Images

Figure CN223001625U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of motor vehicles, and particularly to a structure in which a motor vehicle is combined with a refrigeration heater or a vortex tube, and a storage box under the seat of the motor vehicle is used for heat preservation or cold preservation, and the storage box placed in front of the pedal or behind the seat of the motor vehicle for the delivery personnel to ride is used for refrigeration or heat preservation inside the motor vehicle and the combined structure of the motor vehicle and the refrigeration heater. Background Art
[0002] With the rapid growth of urban logistics and distribution services, especially the increasing demand for food delivery services, how to maintain the freshness and safety of food during the delivery process has become a major challenge. In addition, delivery personnel ride for a long time in various weather conditions and also need a device that can provide appropriate temperature adjustment to improve work comfort and efficiency. The existing technical structure of the delivery box is only a square soft plastic box, and at most there is a layer of heat preservation layer inside it. Since it lacks a comprehensive device that can effectively solve the above problems, its practicality is greatly reduced, which is a point that those skilled in the art and consumers extremely want to break through. Summary of the Utility Model
[0003] To solve the above deficiencies of the prior art, the main purpose of the present utility model is to provide a combined structure of a motor vehicle and a refrigeration heater, which is a structure in which a motor vehicle is combined with a vortex tube or a refrigeration heater, and can achieve cold preservation or heat preservation in the storage box under the seat of the motor vehicle, and can achieve refrigeration and heat preservation inside the storage box placed on the motor vehicle, meeting the temperature requirements of different items during the delivery process, in order to overcome the difficulties in the prior art.
[0004] The secondary purpose of the present utility model is to provide a combined structure of a motor vehicle and a refrigeration heater, and the combined structure of the motor vehicle and the refrigeration heater can also provide a comfortable driving environment for delivery personnel in different weather conditions or dry items using a hot storage box.
[0005] Another purpose of the present utility model is to provide a combined structure of a motor vehicle and a refrigeration heater, which can effectively improve its convenience of use, keep food fresh and safe.
[0006] The problem to be solved by the present utility model is that according to the existing structure of the delivery box, it is only a square soft plastic box, and at most there is a layer of heat preservation layer inside it. Since it lacks the ability to effectively maintain the freshness and safety of food during the delivery process; delivery personnel ride for a long time in various weather conditions and cannot adjust the temperature to improve work comfort and efficiency, resulting in a great reduction in its practicality.
[0007] Technical Means for Solving the Problem: To achieve the above purpose, the present utility model provides a combined structure of a motor vehicle and a refrigeration heater, including:
[0008] At least one storage box, inside which there is a partition wall and a cold storage box and a hot storage box are respectively formed. At least one cover is provided at the upper end or around the storage box. One end of a telescopic pipe is respectively connected to the cold storage box and the hot storage box of the storage box. The outer ends of the telescopic pipes are respectively connected to the cold end and the hot end of a vortex tube that is joined to an exhaust pipe;
[0009] The cold air is conveyed to the cold storage box of the storage box by the cold end of the vortex tube, and the hot air is conveyed to the hot storage box of the storage box by the hot end of the vortex tube.
[0010] Wherein, the storage box of the present utility model is arranged on a pedal of a motor vehicle having a front section of a battery.
[0011] Wherein, a seat cushion is provided in the middle section of the motor vehicle of the present utility model, and a storage box is provided under the seat cushion. Another telescopic pipe is connected to the storage box. The outer end of the telescopic pipe is connected to the cold end of the vortex tube. The cold air of the vortex tube is conveyed to the storage box by the telescopic pipe to provide freshness preservation.
[0012] Wherein, a telescopic pipe is connected to the storage box of the seat cushion of the present utility model. The outer end of the telescopic pipe is connected to the hot end of the vortex tube. The hot air of the vortex tube is conveyed to the storage box by the telescopic pipe to provide heat preservation.
[0013] Wherein, the storage box of the seat cushion of the present utility model and the connected another telescopic pipe and the vortex tube are replaced such that a partition wall is provided inside the storage box and a cold storage box and a hot storage box are formed. At least one refrigerating and heating device electrically connected to the battery of the motor vehicle is provided on the partition wall and has a cold end and a hot end. The cold end of the refrigerating and heating device corresponds to the cold storage box, and the hot end corresponds to the hot storage box.
[0014] Wherein, at least one of the storage boxes is provided at the rear section of the seat cushion of the motor vehicle of the present utility model. A partition wall is provided inside the storage box and a cold storage box and a hot storage box are respectively formed. At least one cover is provided at the upper end or around the cold storage box and the hot storage box of the storage box. At least one refrigerating and heating device is provided on the partition wall of the storage box. The refrigerating and heating device has a cold end corresponding to the cold storage box and a hot end corresponding to the hot storage box, and the refrigerating and heating device is electrically connected to the battery of the motor vehicle.
[0015] Technical means for solving the problem. To achieve the above object, the present utility model provides a combined structure of a motor vehicle and a refrigerating and heating device, including:
[0016] At least one storage box, inside which there is a partition wall and a cold storage box and a hot storage box are respectively formed. At least one cover is provided at the upper end or around the cold storage box and the hot storage box of the storage box. At least one refrigeration and heating device is provided on the partition wall of the storage box, and the refrigeration and heating device has a cold end corresponding to the cold storage box and a hot end corresponding to the hot storage box. The refrigeration and heating device is electrically connected to a battery of the motor vehicle.
[0017] Wherein, the storage box of the present utility model is provided on a pedal in front of the battery of a motor vehicle.
[0018] Or at the rear section of a seat cushion provided in the middle section of the motor vehicle.
[0019] Wherein, at least one fan is provided on at least one side of the cold storage box and the storage box of the storage box, and a telescopic pipe is connected to the outside of the fan; at least one safety helmet is provided on the outside of the telescopic pipe of the cold storage box; at least one windbreaker is provided on the outside of the telescopic pipe of the hot storage box.
[0020] Wherein, a seat cushion is provided in the middle section of the motor vehicle, and a storage box is provided below the seat cushion of the motor vehicle. Inside the storage box, there is a partition wall and a cold storage box and a hot storage box are formed. At least one refrigeration and heating device electrically connected to the battery of the motor vehicle is provided on the partition wall and has a cold end and a hot end. The cold end of the refrigeration and heating device corresponds to the cold storage box, and the hot end corresponds to the hot storage box.
[0021] Compared with the effects of the prior art, the present utility model provides a structure in which the motor vehicle is combined with the vortex tube or the refrigeration and heating device; thereby achieving the ability to keep cold or warm in the storage box below the seat cushion of the motor vehicle, and to achieve refrigeration and heat preservation inside the storage box of the motor vehicle, meeting the temperature requirements of different items during the delivery process; the combined structure of the motor vehicle and the refrigeration and heating device can also provide a comfortable driving environment for delivery personnel under different weather conditions or dry items using the hot storage box; effectively improving its convenience in use, keeping food fresh and safety, meeting the requirements of progress, practicality and users, and showing its advantages. Description of the Drawings
[0022] Figure 1 It is a three-dimensional combination diagram of the present utility model.
[0023] Figure 2 It is a combined sectional view of the present utility model.
[0024] Figure 3 It is a combination diagram of another embodiment of the present utility model.
[0025] Figure 4 It is a combined sectional view of another embodiment of the present utility model.
[0026] Description of reference numerals: 1 - motor vehicle; 11 - pedal; 12 - seat; 120 - storage box; 1200 - partition wall; 1201 - cold storage box; 1202 - heat storage box; 13 - battery; 2 - refrigeration and heating device; 21 - cold end; 22 - hot end; 3 - storage box; 30 - partition wall; 300 - cover; 31 - cold storage box; 32 - heat storage box; 4 - fan; 5 - telescopic duct; 6 - safety helmet; 7 - windbreaker; 8 - vortex tube; 81 - cold end; 82 - hot end. Detailed implementation manners
[0027] The present utility model will be described in detail below in conjunction with the accompanying drawings in the form of embodiments. The accompanying drawings used in the present utility model are only for illustration and auxiliary description purposes, and may not be the actual proportions and precise configurations after the implementation of the present utility model. Therefore, the patent scope of the present utility model in actual implementation should not be limited by the proportional and configurational relationships of the attached drawings. This is hereby stated first.
[0028] Please refer to Figure 1 , Figure 2 and Figure 3 , Figure 4As shown, they are respectively the three-dimensional combination diagram of the present utility model, the combined sectional view of the present utility model, the combined diagram of another embodiment of the present utility model, and the combined sectional view of another embodiment of the present utility model; in a preferred embodiment, the combined structure of the motor vehicle and the refrigeration and heating device of the present utility model includes: at least one storage box 3, inside which there is a partition wall 30 and a cold storage box 31 and a hot storage box 32 are respectively formed. At least one cover 300 is provided at the upper end or around the storage box 3. One side of the cold storage box 31 and the hot storage box 32 are respectively connected with a telescopic pipe 5, and the outer ends of the telescopic pipes 5 are respectively connected with a cold end 81 and a hot end 82 of a vortex tube 8 engaged with the exhaust pipe; by using the gas discharged by turning the throttle of the handgrip of the motor vehicle 1, cold air is transported to the cold storage box 31 of the storage box 3 through the cold end 81 of the vortex tube 8, and hot air is transported to the hot storage box 32 of the storage box 3 through the hot end 82 of the vortex tube 8; the storage box 3 is arranged on a footrest 11 at the front section of a battery 13 of a motor vehicle 1, but the present utility model is not limited thereto; a seat cushion 12 is provided in the middle section of the motor vehicle 1 and a battery 13 is provided on the footrest 11, but the present utility model is not limited thereto. The battery 13 can be arranged on the foot mat of the motor vehicle 1 or under the seat cushion 13. There is a storage box 120 under the seat cushion 12, and the storage box 120 is connected with another telescopic pipe 5. The outer end of the telescopic pipe 5 is connected with the cold end 81 of the vortex tube 8, and the cold air of the vortex tube 8 is transported to the storage box 120 through the telescopic pipe 5 to provide freshness preservation; the storage box 120 of the seat cushion 12 is connected with a telescopic pipe 5, and the outer end of the telescopic pipe 5 is connected with the hot end 82 of the vortex tube 8, and the hot air of the vortex tube 8 is transported to the storage box 120 through the telescopic pipe 5 to provide heat preservation (such as Figure 1 , Figure 2 shown).
[0029] Please refer to Figure 3 , Figure 4As shown, the storage box 120 of the seat cushion 12 and the connected telescopic pipe 5 and vortex tube 8 are replaced. Inside the storage box 120, a partition wall 1200 is provided and a cold storage box 1201 and a heat storage box 1202 are formed. The partition wall 1200 is provided with at least one refrigeration and heating device 2 electrically connected to the battery 13 of the motor vehicle 1 and has a cold end 21 and a hot end 22. The cold end 21 of the refrigeration and heating device 2 corresponds to the cold storage box 1201, and the hot end 22 corresponds to the heat storage box 1202; at least one storage box 3 is provided at the rear section of the seat cushion 12 of the motor vehicle 1. Inside the storage box 3, a partition wall 30 is provided and a cold storage box 31 and a heat storage box 32 are respectively formed. At least one cover 300 for taking and placing items is provided at the upper end or around the cold storage box 31 and the heat storage box 32 of the storage box 3. The storage box 3 is provided with at least one refrigeration and heating device 2 on the partition wall 30. The refrigeration and heating device 2 has a cold end 21 corresponding to the cold storage box 31 and a hot end 22 corresponding to the heat storage box 32. The refrigeration and heating device 2 is electrically connected to the battery 13 of the motor vehicle 1.
[0030] Please refer to Figure 3 、 Figure 4 As shown, in a preferred embodiment of the combined structure of the motor vehicle and the refrigeration and heating device of the present invention, it includes: at least one storage box 3. Inside the storage box 3, a partition wall 30 is provided and a cold storage box 31 and a heat storage box 32 are respectively formed. At least one cover 300 for taking and placing items is provided at the upper end or around the cold storage box 31 and the heat storage box 32 of the storage box 3. The storage box 3 is provided with at least one refrigeration and heating device 2 on the partition wall 30. The refrigeration and heating device 2 has a cold end 21 corresponding to the cold storage box 31 and a hot end 22 corresponding to the heat storage box 32. The refrigeration and heating device 2 is electrically connected to the battery 13 of the motor vehicle 1; the storage box 3 is provided on a footrest 11 at the front section of the motor vehicle 1 having the battery; the storage box 3 is provided on the footrest 11 and / or the rear section of the seat cushion 12 of the motor vehicle 1, but the present invention is not limited thereto; at least one fan 4 is provided on at least one side of the cold storage box 31 of the storage box 3. A telescopic pipe 5 is connected to the outside of the fan 4. At least one fan 4 is provided on at least one side of the heat storage box 32 of the storage box 3. A telescopic pipe 5 is connected to the outside of the fan 4; at least one safety helmet 6 is provided on the outside of the telescopic pipe 5 of the cold storage box 31; at least one windbreaker 7 is provided on the outside of the telescopic pipe 5 of the heat storage box 32; a storage box 120 is provided below the seat cushion 12 of the motor vehicle 1. Inside the storage box 120, a partition wall 1200 is provided and a cold storage box 1201 and a heat storage box 1202 are formed. The partition wall 1200 is provided with at least one refrigeration and heating device 2 electrically connected to the battery 13 of the motor vehicle 1 and has a cold end 21 and a hot end 22. The cold end 21 of the refrigeration and heating device 1 corresponds to the cold storage box 1201, and the hot end 22 corresponds to the heat storage box 1202.
[0031] Please cooperate with Figure 1 、 Figure 2 As shown, the utility model can utilize the telescopic pipe 5 to connect with the cold end 81 or the hot end 82 of the vortex tube 8 inside the storage box 120 under the seat cushion 12 of the motor vehicle 1 to achieve the function of cold preservation / or heat preservation, can place items such as fruits, vegetables, cold drinks, etc. for fresh-keeping or place hot food or hot drinks, etc. for heat preservation. The delivery person's motor vehicle 1 can place the storage box 3 on the front footrest 11 or the storage 3 can be placed behind the seat cushion 12 of the motor vehicle 1. The storage box 3 can be connected to the cold end 81 or the hot end 82 of the vortex tube 8. And there is a refrigeration and heating device 2 inside the storage box 3, and the storage box 3 is separated into a cold storage box 31 and a hot storage box 32 by the partition wall 30 provided, so as to provide fresh-keeping for cold items and warm items during the whole delivery process. And the hot storage box 32 can also quickly dry items such as the safety helmet 6 and raincoat on rainy days. When the cold storage box 31 and the hot storage box 32 are cooperatively connected to the fan 4 and the telescopic pipe 5 or connected under the safety helmet 6 and the windbreaker 7, it can make the delivery person driving the motor vehicle 1 for a long time blow cold air from the cold storage box 31 of the storage box 3 in summer or blow hot air from the hot storage box 32 of the storage box 3 in winter. Please cooperate with Figure 3 、 Figure 4 As shown, one or more refrigeration and heating devices 2 are installed inside the storage box 120 under the seat cushion 12 of the motor vehicle 1 or inside the storage box 3 placed on the footrest 11 or behind the motor vehicle 1 to achieve the refrigeration and heating effects, so that the inside of the storage box 120 under the seat cushion 12 of the motor vehicle 1 and the inside of the storage box 3 can achieve the effects of fresh-keeping or heat preservation.
[0032] The main features of the utility model: The cold preservation or heat preservation function of the storage box 120 inside the seat cushion 12 of the motor vehicle 1: A refrigeration and heating device 2 is arranged or the vortex tube 8 is connected inside the storage box 120 under the seat cushion 12 of the motor vehicle 1 to form a space that can be used for cold preservation or heat preservation, which is suitable for storing items such as fruits, vegetables, cold drinks, etc. that need fresh-keeping or heat preservation; by adjusting the operation mode of the refrigeration and heating device 2, the low-temperature environment or the hot environment inside the storage box 120 under the seat cushion 12 of the motor vehicle 1 is ensured, and the freshness and heat preservation of the items are effectively extended.
[0033] The refrigeration and heat preservation functions of the storage box 3 of the utility model:
[0034] The interior of the storage box 3 is divided into a cold storage box 31 and a hot storage box 32. The refrigeration device of the refrigeration and heating device 2 is arranged in the cold storage box 31 for storing items that need to be refrigerated; the heating device of the refrigeration and heating device 2 is arranged in the hot storage box 32 for storing items that need to be kept warm; the cold storage box 31 can maintain a low temperature during the delivery process to ensure the quality and safety of refrigerated food; the hot storage box 32 can maintain a high temperature during the delivery process, which is suitable for keeping warm food or quickly drying items such as rain gear and helmets.
[0035] The retractable pipe 5 and the fan 4 device of the present utility model:
[0036] The retractable pipe 5 and the fan 4 device are provided. One end of the retractable pipe 5 is connected to the refrigeration and heating device 2, and the other end can be connected to the safety helmet 6 and the windbreaker 7; in summer, the retractable pipe 5 can be connected to the cold storage box 31 of the storage box 3 to provide cold air for the driver; in winter, the retractable pipe 5 can be connected to the hot storage box 32 of the storage box 3 to provide hot air for the driver, enhancing driving comfort.
[0037] The flexible configuration of multiple refrigeration and heating devices 2 of the present utility model:
[0038] According to needs, one or more refrigeration and heating devices 2 can be installed on the motor vehicle 1 to achieve better refrigeration and heating effects; the configuration of the refrigeration and heating device 2 can be flexibly adjusted to meet different driving conditions and delivery requirements.
[0039] Advantages of the present utility model:
[0040] Improve the freshness preservation effect during food delivery and extend the freshness of food.
[0041] Provide a comfortable driving environment for delivery personnel under extreme weather conditions and improve work efficiency.
[0042] The equipment structure is flexible, and the configuration can be adjusted according to needs to adapt to different usage scenarios.
[0043] Realize multi-functional use of one machine and reduce the installation and maintenance costs of additional equipment.
[0044] The present utility model provides an innovative structure of the combination of a motor vehicle and a refrigeration and heating device. Through the cold storage or heat preservation of the accommodation box 120 inside the seat cushion 12 of the motor vehicle 1, the refrigeration and heat preservation of the cold storage box 31 and the hot storage box 32 of the storage box 3, and the combination of the fan 4 and the retractable pipe 5, the dual effects of food freshness preservation and driving comfort are achieved, with broad application prospects and remarkable practical value; solve the problem that the accommodation box 120 of the general motor vehicle 1, or the storage box 3 placed on the footrest 11, or the externally added storage box 3, all do not have cold storage or heating and heat preservation devices.
[0045] The present utility model provides a structure in which the motor vehicle 1 is combined with the vortex tube 8 or and the refrigeration and heating device 2; thereby achieving the ability to keep cold or warm the storage box 120 under the seat cushion 12 of the motor vehicle 1, and to achieve refrigeration and heat preservation inside the storage box 120 of the motor vehicle 1, meeting the temperature requirements of different items during distribution; the combined structure of the motor vehicle 1 and the refrigeration and heating device 2 can also provide a comfortable driving environment for delivery personnel under different weather conditions or use the hot storage box 32 to dry items; effectively improving its convenience in use, freshness preservation of food and safety, meeting the requirements of progress, practicality and users, thus showing its advantages.
[0046] The above-described embodiments are only for illustrating the technical ideas and features of the present utility model, and the purpose is to enable those of ordinary skill in the art to understand the content of the present utility model and implement it accordingly. It should not be used to limit the patent scope of the present utility model. That is, all equivalent changes or modifications made based on the spirit disclosed in the present utility model should still be covered within the patent scope of the present utility model.
Claims
1. A combination structure of a motor vehicle and a cooling and heating device, characterized in that: include︰ At least one storage box, a partition wall is provided inside the storage box to form a cold storage box and a hot storage box respectively, at least one cover is provided on the upper end or around the storage box, and one side of the cold storage box and the hot storage box are respectively connected to a retractable pipe, and the outer ends of the retractable pipe are respectively connected to a cold end and a hot end of a vortex tube connected to the exhaust pipe; The cold end of the vortex tube is used to transport cold air to the cold storage box of the storage box, and the hot end of the vortex tube is used to transport hot air to the hot storage box of the storage box.
2. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 1, characterized in that: The storage box is arranged on a pedal in front of a battery of a motor vehicle.
3. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 2, characterized in that: A seat cushion is provided in the middle section of the motor vehicle and a containing box is provided under the seat cushion, the containing box is connected to another telescopic pipe, the outer end of the other telescopic pipe is connected to the cold end of the vortex tube, and the cold air of the vortex tube is transported to the containing box by the other telescopic pipe to provide freshness preservation.
4. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 3, characterized in that: The accommodation box of the seat cushion is connected with a retractable pipe, the outer end of the retractable pipe is connected to the hot end of the vortex tube, and the hot air of the vortex tube is transported to the accommodation box by the retractable pipe to provide heat preservation.
5. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 3 or 4, characterized in that: The storage box of the seat cushion and the other retractable pipe and the vortex tube connected thereto are replaced by a partition wall provided inside the storage box to form a cold storage box and a hot storage box. The partition wall is provided with at least one cooling and heating device electrically connected to the battery of the motor vehicle and having a cold end and a hot end. The cold end of the cooling and heating device corresponds to the cold storage box, and the hot end corresponds to the hot storage box.
6. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 3 or 4, characterized in that: The rear section of the seat cushion of the motor vehicle is provided with at least one storage box, a partition wall is provided inside the storage box to form a cold storage box and a hot storage box respectively, at least one cover is provided on the upper end or around the cold storage box and the hot storage box of the storage box, and the storage box is provided with at least one cold heater on the partition wall, the cold heater has a cold end corresponding to the cold storage box and a hot end corresponding to the hot storage box, and the cold heater is electrically connected to the battery of the motor vehicle.
7. A combination structure of a motor vehicle and a cooling and heating device, characterized in that: include︰ At least one storage box, a partition wall is provided inside the storage box to form a cold storage box and a hot storage box respectively, at least one cover is provided on the upper end or around the cold storage box and the hot storage box of the storage box, and the storage box is provided with at least one cold heater on the partition wall, and the cold heater has a cold end corresponding to the cold storage box and a hot end corresponding to the hot storage box, and the cold heater is electrically connected to a battery of the motor vehicle.
8. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 7, characterized in that: The storage box is arranged on a pedal in front of the battery of a motor vehicle or on the rear of a seat cushion in the middle of the motor vehicle.
9. The combination structure of a motor vehicle and a cooling and heating device as claimed in claim 8, characterized in that: The cold storage box and at least one side of the storage box are provided with at least one fan, and a retractable pipe is connected to the outside of the fan; at least one safety helmet is provided outside the retractable pipe of the cold storage box; at least one windbreaker is provided outside the retractable pipe of the hot storage box.
10. The combination structure of a motor vehicle and a cooling and heating device according to any one of claims 7 to 9, characterized in that: A seat cushion is provided in the middle section of the motor vehicle, and a storage box is provided under the seat cushion of the motor vehicle. A partition wall is provided inside the storage box to form a cold storage box and a hot storage box. The partition wall is provided with at least one cold heater electrically connected to the battery of the motor vehicle and has a cold end and a hot end. The cold end of the cold heater corresponds to the cold storage box, and the hot end corresponds to the hot storage box.