Heating heat preservation box and heat preservation system

Abstract

The utility model provides a heating thermal insulation box and a thermal insulation system. The heating thermal insulation box comprises a box body and an inner container cavity. The box body is provided with a socket, a plug and a heater to form a heating assembly, the socket is matched with the plug, and the plug is electrically connected with the heater and used for heating when the plug is powered on; the inner container cavity is formed in the box body and used for containing objects and forming a sealed space. The heat-chain box lunch box is used for loading heat-chain box lunch and other commodities needing heat preservation, long-distance conveying is carried out, and it is guaranteed that the temperature of the commodities in the box is controllable; the heat preservation box system comprises at least two heating heat preservation boxes, wherein the first heating heat preservation box is used for being electrically connected to the power supply through the plug of the first heating heat preservation box; the second heating thermal insulation box is used for being electrically connected to the socket of the first heating thermal insulation box through the plug of the second heating thermal insulation box; the other heating insulation boxes are electrically connected to the second heating insulation box socket or the following heating insulation box socket in sequence; when the first heat preservation box is in a heating state, the second heat preservation box and other heat preservation boxes are also in a heating state.

Description

Technical Field

[0001] The utility model relates to an internal heating insulation box in the fields of mechanical structure, electronic circuit and computer control, in particular to a insulation system composed of a plurality of insulation boxes. Background Art

[0002] Traditional group meal delivery mostly adopts the method of putting hot chain food into lunch boxes and then putting them into foam boxes for insulation. Since the distance between the meal kitchen and the dining institution is uncertain, some of them require an hour or even more driving time to reach. The food in the foam box without heating function is difficult to maintain a delicious dining temperature after an hour by relying solely on the heat of the food when it leaves the factory. Especially in areas with lower climates, the situation is more serious. The traditional improvement measure is to arrange the kitchen inside the dining institution to shorten the transportation distance. However, the decentralized meal delivery method reduces work efficiency, increases meal delivery costs, and also takes up more space, which does not meet the regulations. The central kitchen model can bring economies of scale and effectively reduce production costs, but it also brings the problem of long transportation distances and poor insulation effect of non-heating foam boxes on boxed meals. Therefore, the traditional method of directly using foam boxes without heating function to transport hot chain lunches, or although it can be heated, each insulation box needs to be connected to the power supply one by one, and multiple insulation boxes cannot be stacked and heated at the same time, let alone heated during transportation. There is no temperature control system to set the target temperature for heating according to the transportation time. It can no longer meet the requirements of mass production, centralized meal supply, and long-distance distribution of hot chain lunches in modern society. Utility Model Content

[0003] The first purpose of the utility model is to provide an insulation box that can generate heat inside the box, which is used to load goods that need to be kept warm, such as hot chain lunch boxes, and transport them over long distances, ensuring that the temperature of the goods in the box can be controlled.

[0004] The second purpose of the present utility model is to provide a box internal heating temperature control technology for presetting the insulation temperature target value according to the length of time in transit, and automatically stopping heating after the power is connected to heat and the preset temperature target value is reached.

[0005] The third purpose of the present invention is to provide a technology for simultaneously heating multiple heating insulation boxes, which is used to connect multiple insulation boxes in series for one-time heating, solve the problem of complicated power line routing when many insulation boxes are stacked, and reduce the difficulty of operation.

[0006] The fourth purpose of the present invention is to provide an insulation box with a built-in power cord, each insulation box can be independently plugged in for heating, and can also be powered in series or in parallel with each other, solving the problem of storage and access of the external power cord of the insulation box during operation, making it convenient to carry the insulation box and allow heating and insulation at any time.

[0007] Part of the advantages of the present invention can be learned from the following description, and the other part can be learned through application of the embodiments.

[0008] In order to achieve the above objectives, and in accordance with the purpose of the utility model generally described herein, the utility model discloses the following:

[0009] An internal heating insulation box, comprising:

[0010] A box body is provided with a socket, a plug and a heater to form a heating assembly, the socket and the plug match each other, the plug is electrically connected to the heater, and the heater generates heat when the plug is powered;

[0011] An inner cavity is provided in the box body for accommodating articles and forming a sealed space. In addition, the box body includes:

[0012] The box body includes a shell, an insulation layer, a heating component and an inner liner arranged in sequence from the outside to the inside, which is used to form an open inner cavity to accommodate items and can be heated;

[0013] The box cover comprises a shell, a heat-insulating layer and an inner liner arranged in sequence from the outside to the inside, and is used to cover the box body to form the inner liner cavity;

[0014] or

[0015] The box body includes a shell, an insulation layer and an inner liner arranged in sequence from the outside to the inside, which is used to form an open inner cavity for accommodating items;

[0016] The box cover comprises a shell, a heat-insulating layer, a heating component and an inner liner which are sequentially arranged from the outside to the inside, and is used to cover the box body to form an inner liner cavity which can be heated.

[0017] Furthermore, the heater comprises:

[0018] a heating wire electrically connected to the plug;

[0019] The heat conducting plate is connected to the heating wire and is used for conducting the heat generated by the heating wire.

[0020] Furthermore, the heating component may further include:

[0021] a switch circuit, electrically connected between the plug and the heating wire, for connecting or disconnecting the electrical connection between the plug and the heating wire;

[0022] and / or

[0023] The status indicator is electrically connected to the switch circuit and is used to identify the heating or insulation status of the heating and insulation box.

[0024] and / or

[0025] The control module is electrically connected to the switch circuit and is used to control the heater to heat or stop heating the inner container.

[0026] Furthermore, the control module includes:

[0027] A temperature sensor, used to collect the temperature of the heat conducting plate;

[0028] A signal collector, used to collect the temperature signal of the temperature sensor;

[0029] A temperature setter, used to set a target temperature value of the heat conducting plate;

[0030] a temperature comparator, configured to compare the temperature signal with the target temperature value to obtain a temperature difference;

[0031] A heating trigger is used to trigger the sending of an instruction for the switching circuit to operate according to the temperature difference, so as to connect or disconnect the electrical connection between the plug and the heating wire.

[0032] Still further, the housing comprises:

[0033] A power cord placement position, used for placing the plug and the power wire connected to the plug;

[0034] Socket installation position, used for fixed installation of power socket.

[0035] Furthermore, the power cord placement position includes:

[0036] A circular tubular placement position, the circular tubular body is closed, one end of which is open for placing or pulling out the plug end of the power cord, and the other end is provided with a fixing position for fixing the non-plug end of the power cord and connecting it to the socket;

[0037] or,

[0038] The semi-open placement position is that the circular tube body is semi-open, one end of which is provided with a fixing groove for placing the plug end of the power cord, and the other end is provided with a fixing position for fixing the non-plug end of the power cord and connected to the socket.

[0039] The present invention also provides a heating and heat preservation box system, comprising at least two heating and heat preservation boxes, wherein the at least two heating and heat preservation boxes include:

[0040] The first heating and insulated box is configured to be electrically connected to the power supply via the plug provided therewith; the second heating and insulated box is configured to be electrically connected to the socket of the first heating and insulated box via the plug provided therewith;

[0041] The other heating and insulated boxes are electrically connected to the second or subsequent heating and insulated box sockets in sequence;

[0042] When the first heat preservation box is in a heating state, the second and other heat preservation boxes are also in a heatable state.

[0043] Compared with the prior art, this utility model has the following advantages:

[0044] 1. There is no need to worry about the long transportation distance causing the product to cool too low, resulting in poor user experience. For institutions with large food supply volumes, production can be arranged in advance and then stored in a heating insulation box to ensure that the quality of users' meals is not reduced.

[0045] 2. There is no need to configure an external power cord for each incubator. Each incubator has a built-in power cord and can also provide an output power socket. When heating is needed, just extend the power cord and plug it into the external or other incubator output power socket. After heating is completed, the power cord will automatically retract and can be placed in the incubator shell without affecting the handling operation.

[0046] 3. It is possible to increase or decrease the number of boxes to be heated at any time. The built-in power cord and output power socket of the insulation box are used. When stacking, they are connected in series to share a power supply line, which takes up less space when heating. The electrical connection of the box that has been heated and is in the insulation state can also be unplugged.

[0047] 4. The thermal insulation boxes can also be heated during transportation. Since multiple thermal insulation boxes can be stacked and heated, the power of the car engine or the battery of the electric car can be used to heat the multiple thermal insulation boxes during transportation, shortening the delivery time and ensuring the quality of the delivered goods. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0049] Figure 1 Schematically illustrates an embodiment of the present application: a diagram of the internal structure of a heating and heat preservation box;

[0050] Figure 2 Schematically shown Figure 1 An internal structure diagram of an embodiment of the box;

[0051] Figure 3 Schematically shown Figure 1 An internal structure diagram of another embodiment of the box;

[0052] Figure 4 Schematically shown Figure 1 A diagram of the internal structure of the heater;

[0053] Figure 5 Schematically shown Figure 1 Internal structure diagram of other components besides the heater;

[0054] Figure 6 Schematically shown Figure 5 Internal structure diagram of the control module;

[0055] Figure 7 Schematically shown Figure 2 A diagram of the internal structure of the housing;

[0056] Figure 8 Schematically shown Figure 7 The internal structure diagram of the embodiment of the power cord placement position;

[0057] Figure 9 Schematically shown Figure 7 The power cord placement position is another embodiment of the internal structure diagram;

[0058] Figure 10 Schematically illustrates another embodiment of the present application: a structural diagram of a heating and heat preservation box system;

[0059] Description of the main reference numerals AH is used to identify the parts of the drawings; A1-A9 are used to identify the internal components of A; A11-A19 are used to identify the internal components of A1, and so on.

[0060] S1-S9 and T1-T9 are used to identify the steps in the accompanying drawings. DETAILED DESCRIPTION

[0061] The following will be combined with the drawings in the embodiments of this application to clearly and completely describe the technical solutions in the embodiments of this application. Obviously, the embodiments described are only part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0062] In this application, terms such as "upper," "lower," "left," "right," "front," "back," "top," "bottom," "inside," "outside," "center," "vertical," "horizontal," "transverse," and "longitudinal" indicate positions or locations based on those shown in the accompanying drawings. "Also" is used to indicate that additional features are optional and not mandatory. These terms are primarily intended to better describe this application and its embodiments and are not intended to limit the devices, elements, or components indicated to having specific positions, or to being constructed or operated in specific positions.

[0063] Furthermore, some of the above terms may be used to express other meanings besides indicating a position or location. For example, the term "on" may also be used to indicate a dependency or connection in certain circumstances. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0064] Furthermore, the terms "install," "place," "set," "provided with," "connected," and "connected" should be interpreted broadly. For example, "installation" can refer to fixed fastening, removable fastening, or an integral structure; "placement" can refer to non-fixed fastening, movable fastening, latch-type, or snap-type connection; and "connection" can refer to mechanical or electrical connection; direct connection, indirect connection through an intermediary, or internal communication between two devices, elements, or components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0065] Furthermore, the terms "first," "second," etc., are primarily used to distinguish between different devices, elements, or components (which may or may not be of the same type and configuration), and are not intended to indicate or imply the relative importance or quantity of the devices, elements, or components indicated. Unless otherwise specified, "plurality" means two or more.

[0066] like Figure 1 As shown, the present method is a utility model embodiment, an internal heating insulation box, comprising: a box body A and an inner tank cavity B, any material and any implementation scheme can be used to realize the insulation box and the inner tank cavity, as long as the function of each component is realized; in order to make the insulation box heat up, the box body A is provided with a heating assembly A3 formed by a socket A31, a plug A32 and a heater A33, the socket A31 and the plug A32 match each other, that is, the plug A32 can be inserted into the socket A31 for electrical connection, if A31 is a two-phase electrical socket, then the plug A32 must also be a two-phase electrical plug; if A31 is a three-phase electrical socket, then the plug A32 must also be a three-phase electrical plug; the plug A32 is electrically connected to the heater A33, and is used for heating the heater A33 when the plug A32 is powered; in order to further illustrate the internal structure of each component thereof, now it is described as follows in conjunction with other drawings:

[0067] In the attached Figure 2 , showing Figure 1The internal structure diagram of an embodiment of the box body A described in the figure includes: a box body A1 and a box cover A2. The box body A1 includes a shell A11, an insulation layer A12, a heating component A3 and an inner liner A4 arranged in sequence from the outside to the inside, which is used to form an open inner liner cavity to accommodate items and can be heated; the shell A11 is used to carry the heating component A3, the insulation layer A12 and the inner liner A4, and is mainly strong and durable, taking into account the processing difficulty and price. For example, cost-effective plastic materials such as PET, PS, PP, PVC, PE can also be metal materials such as aluminum alloy, magnesium alloy, iron alloy, etc. Its processing technology It is also accompanied by material changes, such as injection molding, stamping, bending, welding, etc.; the insulation layer A12 is used to isolate the temperature conduction on both sides of the box wall; any material with a thermal conductivity coefficient less than or equal to a certain conductivity value (such as 0.12) can be used, and is classified by material composition into: organic thermal insulation materials, inorganic thermal insulation materials, and metal thermal insulation materials; classified by material shape into: loose thermal insulation materials, plate-shaped thermal insulation materials, and integral thermal insulation materials. Technical personnel in the same field make their choices based on their understanding of this solution and according to the processing technology (such as injection molding, stamping, bending and welding, etc.) and price. The box cover A2 includes a shell A21, a heat-insulating layer A22 and an inner liner A23 arranged in sequence from the outside to the inside, and is used to cover the box body to form the inner liner cavity; its shell A21 can be made of the same material and process as A11, and the heat-insulating layer A22 can be made of the same material and process as A12; and the inner liner layers A4 and A23 can be made of non-toxic materials, such as plastic, stainless steel, aluminum alloy, etc., and can also be combined with the heat-conducting plate to form a combination of the two, such as aluminum alloy, magnesium alloy, iron alloy plate stretched or welded; the heating component A3 will be Figure 4 and Figure 5 Detailed description in.

[0068] In the attached Figure 3 , showing Figure 1The internal structure diagram of another embodiment of the box A described in the figure comprises: a box body A5 and a box cover A6, the box body A5 comprises a shell A51, an insulation layer A52 and an inner liner A53 arranged in sequence from the outside to the inside, for forming an open inner liner cavity to accommodate items; the shell A51 is used to carry the insulation layer A52 and the inner liner A53, and is mainly strong and durable, taking into account the processing difficulty and price, for example, cost-effective plastic materials such as PET, PS, PP, PVC, PE, etc., and metal materials such as aluminum alloy, aluminum-magnesium alloy, iron alloy, etc. can also be used, and the processing technology also changes with the material, such as injection molding, stamping, bending, welding, etc.; the insulation layer A52 can be implemented with the same materials and processes as A12; the inner liner A53 can be implemented with the same materials and processes as A4 and A23. The box cover A6 includes a shell A61, a heat-insulating layer A62, a heating component A63 and an inner liner A64 arranged in sequence from the outside to the inside, which is used to cover the box body A5 to form the inner liner cavity and can be heated; the shell A61 can be made of the same material and process as A51, and the heat-insulating layer A62 can be made of the same material and process as A12; the heating component A63 will be Figure 4 and Figure 5 The inner liner layer A64 can be made of the same materials and processes as A4 and A23, and will not be repeated.

[0069] exist Figure 4 , showing Figure 1 The internal structure diagram of the heater A33 includes: a heating wire A331 electrically connected to the plug; and a heat conducting plate A332 connected to the heating wire for conducting the heat generated by the heating wire. A331 can be made of an electric heating alloy material, such as an iron-chromium-aluminum alloy series or a nickel-chromium alloy series, which can be made into a linear or flat ribbon shape for easy combination with other materials. A332 can be implemented using materials with high thermal conductivity, such as metallic aluminum, iron, magnesium, etc. Graphite materials such as graphene, thermally conductive graphite sheets, and graphite heat dissipation films can also be used. Ceramic materials such as aluminum oxide, silicon carbide, AIN ceramics, PCD ceramics, SiC ceramics, Si3N4 ceramics, and high-temperature co-fired ceramics can also be used. The above materials can also be implemented in combination, such as coating graphene, aluminum oxide, or silicon carbide on metal materials to improve thermal conductivity.

[0070] exist Figure 5 , showing Figure 1The internal structure diagram of the heating component; including: a switch circuit C electrically connected between the plug and the heating wire, for connecting or disconnecting the electrical connection between the plug and the heating wire; and / or, a status indicator D electrically connected to the switch circuit C, for indicating the heating or insulation status of the heating insulation box; and / or, a control module E electrically connected to the switch circuit, for controlling the heater to heat or stop heating the inner tank. In the switch circuit C, a mechanical switch method can be used, such as a manual switch, which can turn the power on or off by manually turning it. An electromagnetic relay method can also be used to load current into the coil to make the armature move, open or close the contacts, and turn the power on or off. A thermal reed relay can be used to open or close the contacts according to the temperature. A solid-state relay can also be used to use a tiny control signal to directly drive a large current load to load or unload the power supply. The status indicator D is used to identify the current heating status. Any technical solution can be used. For example, a light-emitting diode can be used to emit red light when in the heating state and emit blue light when heating is completed. A buzzer can also be used to emit a buzzer when in the heating state and stop buzzing when heating is completed, or vice versa. A liquid crystal display can also be used to display its status. As long as the heating status can be recognized by people, the control module E is Figure 6 Provide explanation.

[0071] exist Figure 6 , showing Figure 5 The internal structure diagram of the control module; includes: a temperature sensor E1 for collecting the temperature of the heat conducting plate; a signal collector E2 for collecting the temperature signal of the temperature sensor; a temperature setter E3 for setting the target temperature value of the heat conducting plate; a temperature comparator E4 for comparing the temperature signal with the target temperature value to obtain a temperature difference; and an instruction transmitter E5 for triggering the sending of an instruction for the switching circuit action based on the temperature difference to connect or disconnect the electrical connection between the plug and the heating wire.

[0072] Temperature sensor E1 can be any type of temperature sensor, such as a thermocouple or thermistor, as long as it can convert a temperature signal into an electrical signal. Signal collector E2 typically needs to be compatible with the temperature sensor being used. For example, a thermocouple consists of two dissimilar metal wires (metal A and metal B) connected at one end. When one end of the thermocouple is heated, a potential difference is generated in the thermocouple circuit; this measured potential difference can be used to calculate the temperature. However, the relationship between voltage and temperature is nonlinear, so a second measurement of the reference temperature (Tref) is required. The voltage-to-temperature conversion is then processed internally by the test equipment software or hardware to ultimately obtain the thermocouple temperature. This is a known technique and therefore need not be elaborated upon. Thermistors measure absolute temperature on two wires and have good accuracy, but they are more expensive than thermocouples and have a smaller measurable temperature range. A commonly used thermistor has a resistance of 5kΩ at 25°C, and every 1°C temperature change causes a 200Ω resistance change. Note that a 10Ω lead resistance only causes a negligible 0.05°C error. They are well suited for current control applications that require fast and sensitive temperature measurement, and their small size is advantageous for space-sensitive applications. By inputting a fixed current and measuring the voltage across the thermistor, the resistance value can be determined. By comparing the resistance value with 5kΩ, the current heat transfer plate temperature is determined. This is also existing technology. In the temperature setter E3, any technical solution can be adopted, such as establishing a three-layer software module: a human-computer interaction layer, a business logic layer, and a database layer. The human-computer interface layer is used for human-computer interaction to realize the interaction between people and machines; the business logic layer is used to execute human-computer interaction instructions, and the database layer and / or structured file layer and / or non-structured file layer is used to record the execution results; it can also be implemented by hardware circuits, such as a variable resistor circuit, a certain resistance value represents a temperature value, and setting the corresponding resistance value represents setting the corresponding temperature value; in the temperature comparator E4; computer software can be used for calculation, for example, the temperature collected by the sensor minus the preset temperature is the temperature difference, or hardware circuits can be used for comparison, such as the collected thermistor impedance The value is compared with the preset variable resistance value, and the difference is converted into a temperature difference; in the instruction transmitter E5; an implementation scheme matching the switch circuit C can be adopted, for example, a manual switch is adopted, and the power supply is turned on or off by manual toggling, and no instruction needs to be sent; if the electromagnetic relay method is adopted, it is to trigger the instruction of loading current or closing current, so that the armature is actuated to open or close the contacts, so that the power supply is turned on or off; if the thermal reed relay is adopted, it is also to trigger the instruction of loading current or closing current, and heat or not heat the thermal reed to open or close the contacts; if the solid-state relay implementation method is adopted, it is still to trigger the control signal of loading current or closing current to drive the high-current load to realize loading or unloading of the power supply.

[0073] Figure 7 Schematically shown Figure 2 The internal structure of the housing; including: a power cord installation position A111 for placing the plug and the power wire connecting the plug; a socket installation position A112 for fixing the power transmission socket; in the power cord installation position A111, any installation method can be used, as long as the power cord and plug are hidden in the housing A11 without affecting the handling, see the specific embodiment Figure 8 ; At the socket installation position A112; any installation method can be used, as long as the socket is hidden in the shell A11, the socket electrodes are exposed to the outside, and the socket power terminal can be connected to the power cord. For example, it can be docked with the power cord installation position A111 to introduce the power cord, and then set screw holes to fasten the socket to the shell A11, making it convenient for others to access electricity. The corresponding screw holes can be set according to the installation hole positions of the socket.

[0074] exist Figure 8 , showing Figure 7 The internal structure diagram of an embodiment of the power cord placement position; including: a circular tube body A1111 for placing the power cord at the plug end, an opening A1112 for placing or pulling out the plug and its power cord, a fixing position A1113 for fixing the other end of the power cord, and a channel A1114 for conducting the power cord to the socket installation position; the same method can be selected according to the material and processing technology of the shell A11, which will not be repeated here.

[0075] exist Figure 9 , showing Figure 7 The internal structure diagram of another embodiment of the power cord placement position; it includes a semi-open circular tube body A1115 for placing the plug end of the power cord, a fixing groove A1116 for placing the plug, a fixing position A1117 for fixing the other end of the power cord, and a channel A1118 for conducting the power cord to the socket installation position; the same method can be selected according to the material and processing technology of the shell A11, so that the spring-type power cord can be conveniently placed in the fixing groove A1116 and is also convenient to take out for electrical connection; it will not be repeated here.

[0076] exist Figure 10 , showing another embodiment of the present application: a structural diagram of a heating and incubator system; comprising: a first heating and incubator F that can be electrically connected to the power supply through the plug provided therewith; a second heating and incubator G that can be electrically connected to the socket of the first heating and incubator through the plug provided therewith; other heating and incubators H that are electrically connected to the socket of the second or subsequent heating and incubator in sequence; the target temperature to be heated can be set in advance for each incubator, and when the first incubator is in a heating state, the second and other heating and incubators are also in a heating state.

[0077] An embodiment may also be to select any heating insulated box as the first heating insulated box, insert its plug into the power supply to draw power, select any next insulated box to be heated as the second insulated box, insert its plug into the socket of the first insulated box to draw power, select any third insulated box from the remaining insulated boxes, insert its plug into the socket of the second insulated box, and so on. After setting the heating target temperature of each insulated box, the heating of all insulated boxes to be heated is completed; the heating target temperature of each insulated box can also be set first, and then the second insulated box and other insulated boxes are electrically connected, and then the first insulated box is electrically connected; the first insulated box can also be electrically connected first, and then the second heating insulated box and other insulated boxes are electrically connected; all of these are embodiments of the present application.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the heating and insulated box and the power connection equipment of the present application, and not to limit them. Although the heating and insulated box and the power connection equipment of the present application are described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. Heating and insulated box, characterized in that: include: A box body is provided with a socket, a power lead with a plug, and a heater to form a heating assembly, wherein the socket matches the plug, and the power lead with the plug is electrically connected to the heater so that the heater can generate heat when the plug is powered; The inner chamber is provided in the box body and is used for accommodating articles and forming a sealed space.

2. The heating and heat preservation box according to claim 1, characterized in that: The box body comprises: a box body, comprising a shell, a heat-insulating layer, a heating component and an inner liner arranged in sequence from the outside to the inside, for forming an open inner liner cavity for accommodating items and heating them; The box cover comprises a shell, a heat-insulating layer and an inner liner arranged in sequence from the outside to the inside, and is used to cover the box body to form the inner liner cavity; or The box body includes a shell, an insulation layer and an inner liner arranged in sequence from the outside to the inside, which is used to form an open inner cavity for accommodating items; The box cover comprises a shell, a heat-insulating layer, a heating component and an inner liner which are sequentially arranged from the outside to the inside, and is used to cover the box body to form an inner liner cavity which can be heated.

3. The heating and heat preservation box according to claim 1, characterized in that: The heater comprises: A heating wire, electrically connected to the power lead with a plug, for converting electrical energy into heat energy; The heat conducting plate is connected to the heating wire and is used for conducting the heat generated by the heating wire.

4. The heating and heat preservation box according to any one of claims 1 to 3, characterized in that: The heating assembly may further comprise: a switch circuit, electrically connected between the power lead with a plug and the heater, for connecting or disconnecting the electrical connection between the power lead with a plug and the heater; and / or a status indicator, electrically connected to the switch circuit, for indicating the heating or heat preservation status of the heating and heat preservation box; and / or The control module is electrically connected to the switch circuit and is used to control the heater to heat or stop heating the inner container.

5. The heating and heat preservation box according to any one of claims 1 to 4, characterized in that: The control module includes: A temperature sensor, used to collect the temperature of the heat conducting plate; A signal collector, used to collect the temperature signal of the temperature sensor; A temperature setter, used to set a target temperature value of the heat conducting plate; a temperature comparator, configured to compare the temperature signal with the target temperature value to obtain a temperature difference; A heating trigger is used to trigger the sending of an instruction for the switch circuit to operate according to the temperature difference, so as to connect or disconnect the electrical connection between the power lead with a plug and the heating wire.

6. The heating and heat preservation box according to any one of claims 1 to 5, characterized in that: The housing comprises: A power cord placement position, used to place the power cord with a plug; Socket installation position, used for fixed installation of power socket.

7. The heating and heat preservation box according to any one of claims 1 to 6, characterized in that: The power cord placement position includes: A circular tubular placement position, the circular tubular body is closed, one end of which is open for placing or pulling out the plug end of the plug power lead, and the other end is provided with a fixing position for fixing the non-plug end of the plug power lead and connected to the socket; or, The semi-open placement position is that the circular tube body is half open, one end of which is provided with a fixing groove for placing the plug end of the power wire with a plug, and the other end is provided with a fixing position for fixing the non-plug end of the power wire with a plug and connected to the socket.

8. A heating and heat preservation box system, characterized in that: The invention comprises at least two heating and heat preservation boxes according to any one of claims 1 to 7, wherein the at least two heating and heat preservation boxes comprise: The first heating and insulation box is used to be electrically connected to an external power supply through the power supply wire with a plug provided therein; The second heating and insulated box is used to be electrically connected to the socket of the first heating and insulated box through the power supply wire with a plug provided therewith; The other heating and insulated boxes are electrically connected to the second or subsequent heating and insulated box sockets in sequence; When the first heat preservation box is in a heating state after being electrically connected, the second and other heat preservation boxes are also in a heating state.

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