Food storage device

Abstract

The utility model discloses a food storage device which comprises an electric appliance main body, an inner container with an opening is arranged in the electric appliance main body, a switch door plate used for opening or closing the opening of the inner container is arranged on the electric appliance main body, and a heat exchange module is arranged on the electric appliance main body. The heat exchange module comprises a refrigerating assembly used for cooling the inner container and a heating assembly used for heating the inner container, the electric appliance body is provided with a first temperature sensing element used for detecting the temperature outside the inner container, and the first temperature sensing element, the refrigerating assembly and the heating assembly are all connected with the control module. A user inputs an instruction for opening the inner container, and when the temperature difference between the external air temperature detected by the first temperature sensing element and the working temperature or the actual temperature of the inner container can cause the condensation phenomenon, the control module drives the refrigeration assembly to stop working and drives the heating assembly to preheat the inner container to the preset temperature; when the switch door plate is opened to take out food, no condensation phenomenon occurs, the food is prevented from being damped and mildewed, and the quality and service life of the stored food are ensured.

Description

Technical Field

[0001] The utility model relates to a food storage device. Background Art

[0002] A vacuum constant temperature rice box is an appliance that uses vacuum technology and constant temperature control technology to store rice. Rice in a vacuum state and at a suitable low temperature can be stored for a longer time, and its flavor is better guaranteed. However, in hot weather such as summer, if the rice box is opened for a long time to take out rice, the inner pot, which is still in a low temperature state, is prone to condensation when it encounters external hot air, and the rice in contact with the inner wall of the inner pot will become damp and moldy, affecting the quality and storage life of the rice. Utility Model Content

[0003] In order to overcome the deficiencies of the prior art, one of the purposes of the utility model is to provide a food storage device that can prevent condensation from occurring when the inner container is opened.

[0004] A food storage device according to an embodiment of the utility model includes: an electrical appliance main body, an inner tank with an opening is arranged in the electrical appliance main body, a switch door panel for opening or closing the opening of the inner tank is provided on the electrical appliance main body, the electrical appliance main body is provided with a heat exchange module, the heat exchange module includes a refrigeration component for cooling the inner tank and a heating component for heating the inner tank, the electrical appliance main body is provided with a first temperature sensing element for detecting the air temperature outside the inner tank, the first temperature sensing element, the refrigeration component and the heating component are all connected to a control module, and the control module can control the action of the heating component according to the external air temperature detected by the first temperature sensing element to preheat the inner tank to a preset temperature.

[0005] According to a food storage device of an embodiment of the utility model, at least the following

[0006] Beneficial effects:

[0007] Before the door panel of the food storage device with the above structure is opened to expose the inner tank, the user inputs a command to open the inner tank, and the control module controls the action of the heating component according to the external air temperature detected by the first temperature sensing element. When the temperature difference between the external air temperature detected by the first temperature sensing element and the working temperature or actual temperature of the inner tank causes condensation to occur, the control module drives the refrigeration component to suspend operation and drives the heating component to preheat the inner tank to a preset temperature. At this time, when the door panel is opened to take out the food, condensation will not occur, thereby preventing the food from getting damp and moldy, thereby ensuring the quality and life of the stored food.

[0008] In some embodiments of the present invention, the air temperature value detected by the first temperature sensing element outside the inner container is A, and the preset temperature is A±3°C.

[0009] In some embodiments of the present invention, the heating component indirectly preheats the inner tank by heating air.

[0010] In some embodiments of the utility model, the heating component includes a hot air inlet and a hot air outlet which are arranged on the switch door panel and connected to the inside of the inner tank, and a circulation fan which drives the hot air to circulate in the inner tank is arranged between the hot air inlet and the hot air outlet.

[0011] In some embodiments of the utility model, the electrical body is provided with a shell assembly on the periphery of the inner tank, and a closed insulation cavity is provided between the shell assembly and the outer peripheral wall of the inner tank. The heat exchange module includes a semiconductor refrigeration plate provided on the outside of the inner tank, and the semiconductor refrigeration plate has a first heat exchange end located within the insulation cavity and a second heat exchange end arranged opposite to the first heat exchange end and located outside the insulation cavity.

[0012] In some embodiments of the utility model, the control module can switch the direction of the current passing through the semiconductor refrigeration plate so that the semiconductor refrigeration plate cools or heats the inner tank; when the semiconductor refrigeration plate cools the inner tank, the first heat exchange end constitutes the refrigeration component; when the semiconductor refrigeration plate heats the inner tank, the first heat exchange end constitutes the heating component.

[0013] In some embodiments of the utility model, the shell assembly has a accommodating cavity for accommodating the inner liner, and the upper and lower parts of the accommodating cavity are provided with a plurality of supporting ridges at circumferential intervals around the accommodating cavity, and the supporting ridges are pressed against the outer wall of the inner liner to form the insulation cavity, and adjacent support ridges have airflow connecting openings connecting various positions of the insulation cavity.

[0014] In some embodiments of the utility model, two semiconductor refrigeration sheets are provided, and the two semiconductor refrigeration sheets are respectively arranged at the upper and lower parts of the same side of the inner tank, and a first fan is provided between the two semiconductor refrigeration sheets. The outside of the first fan and the two first heat exchange ends is provided with a guide air duct located in the insulation cavity and passing through the upper and lower parts, and the guide air duct is provided with an air inlet horizontally facing the inner tank, the air inlet side of the first fan is opposite to the air inlet, and the air outlet side of the first fan can drive two airflows to pass through the two first heat exchange ends respectively and form a circulating flow.

[0015] In some embodiments of the utility model, the shell assembly includes a first half shell and a second half shell that can be spliced ​​into a whole, the supporting ridge is formed on the inner wall of the first half shell or the inner wall of the second half shell, the first half shell is provided with two first positioning half grooves spaced apart from each other on the side facing the second half shell, the second half shell is provided with two second positioning half grooves corresponding to the first positioning half grooves one by one, the first positioning half groove and the corresponding second positioning half groove jointly clamp and fix the four edges of a semiconductor refrigeration plate, the first heat exchange end is connected to a first heat exchange fin group located in the guide air duct, the second heat exchange end is connected to a second heat exchange fin group, the first positioning half groove and the corresponding second positioning half groove jointly clamp and fix a second fan, and the second fan can drive the airflow through the second heat exchange fin group.

[0016] In some embodiments of the present invention, at least one PTC heating element located on the air flow path driven by the first fan is provided in the heat preservation chamber.

[0017] In some embodiments of the present invention, the heating component directly preheats the inner tank.

[0018] In some embodiments of the utility model, the inner tank is in a rectangular cylindrical shape and has four side panels connected in sequence, and the adjacent side panels are perpendicular to each other. The heating component includes four heating wires respectively abutting against the outer walls of the four side panels, and the heating wires are serpentine-shaped along the height direction of the corresponding side panels. The upper end of the heating wire is connected to the upper end of one adjacent heating wire, and the lower end of the heating wire is connected to the lower end of another adjacent heating wire.

[0019] In some embodiments of the present invention, the heating component includes a graphene electric heating film, and the graphene electric heating film is attached to the outer wall of the inner pot to directly preheat the inner pot.

[0020] In some embodiments of the utility model, the switch door panel is provided with an exhaust assembly for extracting the internal gas of the inner tank; the exhaust assembly includes an exhaust pump, a one-way valve, a pressure relief valve and an exhaust pipe which are connected in sequence through pipelines, the exhaust pipe is provided on the switch door panel and connected to the interior of the inner tank, and the pressure relief valve can connect the external gas and the pipeline to restore the interior of the inner tank to a normal pressure state.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The utility model is further described below in conjunction with the accompanying drawings and embodiments.

[0023] Figure 1 It is a schematic diagram of the appearance of an embodiment of the food storage device of the utility model;

[0024] Figure 2 yes Figure 1 An internal cross-sectional schematic diagram of an embodiment;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structural decomposition of an embodiment;

[0026] Figure 4 yes Figure 2 Schematic diagram from another perspective after removing the inner tank, switch door panel, and exhaust assembly.

[0027] Reference numerals:

[0028] The electrical appliance body 100; the inner tank 200; the switch door plate 300; the heat exchange module 400; the semiconductor refrigeration plate 410; the first heat exchange end 411; the second heat exchange end 412; the heating wire 420; the shell assembly 500; the first half shell 510; the first positioning half groove 511; the second half shell 520; the second positioning half groove 521; the supporting ridge 530; the air flow connection port 531; the first heat exchange fin group 540; the second heat exchange fin group 550; the second fan 560; the air inlet 570; the heat preservation chamber 501; the first fan 610; the guide air duct 620; the air inlet 621; the PTC heating element 700; the vacuum pump 810; the one-way valve 820; the pressure relief valve 830. DETAILED DESCRIPTION

[0029] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0030] In the description of the present invention, it should be understood that descriptions involving orientation, such as the orientations or positional relationships indicated by terms such as "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside", etc., are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the description of the present utility model, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood to exclude the number itself, and "above", "below", "within" etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0032] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0033] See also Figures 1 to 4 A food storage device of the present invention comprises: a food storage device comprising: an electrical main body 100, wherein an inner tank 200 with an opening is arranged in the electrical main body 100, a switch door plate 300 for opening or closing the opening of the inner tank 200 is arranged on the electrical main body 100, the electrical main body 100 is provided with a heat exchange module 400, the heat exchange module 400 comprises a refrigeration component for cooling the inner tank 200 and a heating component for heating the inner tank 200, the electrical main body 100 is provided with a first temperature sensing element for detecting the air temperature outside the inner tank 200, the first temperature sensing element, the refrigeration component and the heating component are all connected to a control module, and the control module can control the action of the heating component according to the external air temperature detected by the first temperature sensing element to preheat the inner tank 200 to a preset temperature.

[0034] In the food storage device of the above structure, before the switch door panel 300 opens the inner container 200, the user inputs a command to open the inner container, and the control module controls the operation of the heating component according to the external air temperature detected by the first temperature sensing element. When the temperature difference between the external air temperature detected by the first temperature sensing element and the working temperature or actual temperature of the inner container 200 causes condensation, the control module drives the refrigeration component to suspend operation and drives the heating component to preheat the inner container 200 to a preset temperature. At this time, when the switch door panel 300 is opened to take out the food, condensation will not occur, thereby preventing the food from getting damp and moldy, and ensuring the quality and life of the stored food. When the temperature difference between the external air temperature detected by the first temperature sensing element and the working temperature or actual temperature of the inner container 200 does not cause condensation, the heating component does not need to be started.

[0035] In some embodiments of the present invention, the first temperature sensing element detects an air temperature value A outside the inner tank 200, and the preset temperature is A±3°C. It should be noted that when the air temperature value A detected by the first temperature sensing element is higher than the set working temperature of the inner tank 200 by more than 3°C, or when the air temperature value A detected by the first temperature sensing element is higher than the actual temperature of the inner tank 200 by more than 3°C, the control module controls the heating component to work until the temperature of the inner tank 200 rises to within the range of A±3°C. At this time, the control module controls the heating component to stop working, and no condensation will occur when the switch door panel 300 is opened to take out the food, so as to prevent the food from getting damp and moldy, and ensure the quality and life of the stored food. It is known from experiments that when the temperature difference between the air temperature value A detected by the first temperature sensing element and the temperature of the inner tank 200 is less than 3°C, no condensation will occur, thereby reducing the power consumption of the heating component, accelerating the time when the switch door panel 300 can be opened, and requiring lower measurement accuracy for the temperature sensing element. In addition, the heating component that stops power supply still has residual heat, and can continue to transfer the residual heat to the inner tank 200.

[0036] In some embodiments, in order to determine the actual temperature of the inner tank 200 so that the control module can control the refrigeration component to cool the inner tank 200 to the set working temperature, a second temperature sensing element connected to the control module is provided on the wall panel of the inner tank 200. The second temperature sensing element detects the temperature value of the inner tank 200 as B. In order to more accurately control the start and stop of the heating component, thereby facilitating saving heat energy, when AB≥3°C is satisfied, the control module controls the heating component to start working, and when AB<3°C is satisfied, the control module controls the heating component to stop working.

[0037] In some embodiments of the present invention, the heating component preheats the inner liner 200 indirectly by heating the air. It is understandable that the contact area when the heated air and the inner liner 200 are heat exchanged is wider, which is conducive to uniform heating of the inner liner 200.

[0038] In some embodiments of the utility model, the heating component includes a hot air inlet and a hot air outlet disposed on the switch door plate 300 and connected to the interior of the inner liner 200, and a circulating fan is disposed between the hot air inlet and the hot air outlet to drive the hot air to circulate in the inner liner 200. It should be noted that when the food stored in the inner liner 200 is rice, if only the inner liner 200 is heated, the rice located in the middle of the inner liner 200 is still cold, and condensation will be generated when the hot air encounters the cold rice; the heating component of the above structure allows the hot air heated to a certain temperature to enter the inner liner 200 from the hot air inlet, and then be discharged from the inner liner 200 from the hot air outlet, and the circulating fan drives the hot air flow to circulate rapidly, and the rice located in the middle of the inner liner 200 can also quickly increase the temperature, thereby alleviating the problem of condensation generated by the hot air flow contacting the cold rice.

[0039] See also Figure 2 , Figure 3 and Figure 4 In some embodiments of the utility model, the electrical appliance body 100 is provided with a shell assembly 500 on the periphery of the inner tank 200, and a sealed heat preservation cavity 501 is provided between the shell assembly 500 and the outer peripheral wall of the inner tank 200. The heat exchange module 400 includes a semiconductor cooling plate 410 provided on the outer side of the inner tank 200, and the semiconductor cooling plate 410 has a first heat exchange end 411 located inside the heat preservation cavity 501 and a second heat exchange end 412 arranged opposite to the first heat exchange end 411 and located outside the heat preservation cavity 501. The heat preservation cavity 501 can improve the utilization rate of heat energy and prevent the heat generated by the heating component from overflowing. The cold end of the semiconductor cooling plate 410 acts as a refrigeration component, which has lower cost, simpler structure and smaller volume than the traditional air conditioning system.

[0040] See also Figures 2 to 4In some embodiments of the utility model, the control module can switch the direction of the current passing through the semiconductor refrigeration chip 410 so that the semiconductor refrigeration chip 410 cools or heats the inner liner 200; when the semiconductor refrigeration chip 410 cools the inner liner 200, the first heat exchange end 411 constitutes the refrigeration component; when the semiconductor refrigeration chip 410 heats the inner liner 200, the first heat exchange end 411 constitutes the heating component. It can be understood that by switching the direction of the current input to the semiconductor refrigeration chip 410, the functions of the first heat exchange end 411 and the second heat exchange end 412 can be interchanged, so that the semiconductor refrigeration chip 410 can act as both a refrigeration component and a heating component, avoiding the need to set up a heating component separately, and reducing the cost of the anti-condensation food storage device. Specifically, when the inner liner 200 needs to be cooled, the first heat exchange end 411 is the cold end, and the second heat exchange end 412 is the hot end; when the inner liner 200 needs to be heated, the first heat exchange end 411 is the hot end, and the second heat exchange end 412 is the cold end.

[0041] See also Figure 3 and Figure 4 In some embodiments of the present invention, in order to form the heat preservation chamber 501 and keep the relative position between the shell assembly 500 and the inner liner 200 more stable, the shell assembly 500 has a receiving chamber for accommodating the inner liner 200, and the upper and lower parts of the receiving chamber are provided with a plurality of supporting ridges 530 at intervals around the circumference of the receiving chamber, and the supporting ridges 530 are abutted against the outer wall of the inner liner 200 to form the heat preservation chamber 501, and the supporting ridges 530 are only provided between the upper part of the shell assembly 500 and the upper part of the inner liner 200 and between the lower part of the shell assembly 500 and the lower part of the inner liner 200, thereby reducing the space occupied by the heat preservation chamber 501 as much as possible. In order to ensure that the heat or cold generated by the first heat exchange end 411 can fully contact various positions of the outer peripheral wall of the inner liner 200, thereby improving the heat exchange effect, there are air flow connecting ports 531 between the adjacent supporting ridges 530 to connect various positions of the heat preservation chamber 501.

[0042] See also Figure 4In some embodiments of the utility model, two semiconductor refrigeration sheets 410 are provided, and the two semiconductor refrigeration sheets 410 are respectively arranged at the upper and lower parts of the same side of the inner liner 200, and a first fan 610 is provided between the two semiconductor refrigeration sheets 410. The first fan 610 and the two first heat exchange ends 411 are provided with a guide air duct 620 located in the insulation chamber 501 and passing through from top to bottom, and the guide air duct 620 is provided with an air inlet 621 horizontally facing the inner liner 200, and the air inlet side of the first fan 610 faces the air inlet 621, and the air outlet side of the first fan 610 can drive two air flows to pass through the two first heat exchange ends 411 respectively and form a circulating flow. The provision of two semiconductor refrigeration sheets 410 can increase the amount of cold or heat to improve the heat exchange efficiency with the inner liner 200, and driving the gas flow in the insulation chamber 501 by the first fan 610 is conducive to further improving the heat exchange efficiency. Among them, see Figure 4 The gas located in the middle of the height direction of the heat preservation chamber 501 is sucked into the air inlet side of the first fan 610. Under the guiding effect of the guide air duct 620, the gas is discharged from the air outlet side of the first fan 610, and part of the gas flows upward and the other part flows downward, thereby forming a clockwise circulating airflow and a counterclockwise circulating airflow (the two circulating airflows are shown in FIG. Figure 4 The above structure can achieve high heat exchange efficiency and quiet effect, avoiding turbulence and generating loud noise and gas flow problems.

[0043] See also Figure 3 and Figure 4 In some embodiments of the utility model, the shell assembly 500 includes a first half shell 510 and a second half shell 520 that can be spliced ​​into a whole, the supporting ridge 530 is formed on the inner wall of the first half shell 510 or the inner wall of the second half shell 520, the first half shell 510 is provided with two first positioning half grooves 511 spaced apart from each other on the side facing the second half shell 520, and the second half shell 520 is provided with two second positioning half grooves 521 corresponding to the first positioning half grooves 511 one by one, The first positioning half groove 511 and the corresponding second positioning half groove 521 jointly clamp and fix the four edges of the semiconductor refrigeration plate 410, the first heat exchange end 411 is connected to the first heat exchange fin group 540 located in the guide air duct 620, the second heat exchange end 412 is connected to the second heat exchange fin group 550, the first positioning half groove 511 and the corresponding second positioning half groove 521 jointly clamp and fix a second fan 560, and the second fan 560 can drive the airflow to pass through the second heat exchange fin group 550.

[0044] The first half shell 510 and the second half shell 520 are spliced ​​into a whole to form the shell assembly 500, and the support ridges 530 are formed on the inner walls of the first half shell 510 and the second half shell 520, which is conducive to reducing the difficulty of manufacturing the shell assembly 500. The distance that the support ridges 530 protrude from the inner wall of the first half shell 510 or the second half shell 520 is also easier to control, thereby ensuring that the support ridges 530 can stably abut against the outer peripheral wall of the liner 200. Preferably, the first half shell 510 is formed by injection molding to form the support ridges 530 and the first positioning half grooves 511 thereon, and the second half shell 520 is formed by injection molding to form the support ridges 530 and the second positioning half grooves 521 thereon. In addition, the first positioning half groove 511 and the second positioning half groove 521 are located at the interface where the first half shell 510 and the second half shell 520 are spliced ​​together. The first positioning half groove 511 and the corresponding second positioning half groove 521 together constitute an installation groove for clamping and fixing the semiconductor refrigeration plate 410. The installation groove is arranged through the wall thickness of the shell assembly 500, so that the first heat exchange end 411 is located in the accommodating cavity and the second heat exchange end 412 is located outside the accommodating cavity, thereby realizing heat exchange between the first heat exchange end 411 and the gas in the insulation cavity 501, and heat exchange between the second heat exchange end 412 and the gas outside the inner tank 200.

[0045] Since the two side surfaces of the semiconductor cooling plate 410 are respectively the first heat exchange end 411 and the second heat exchange end 412, the area of ​​the two side surfaces of the semiconductor cooling plate 410 in contact with the gas is relatively small, and the first heat exchange fin group 540 and the second heat exchange fin group 550 can increase the area in contact with the gas, thereby improving the heat exchange efficiency, and the setting of the first fan 610 and the second fan 560 promotes the gas flow rate and improves the heat exchange rate. Among them, the depth dimension of the installation groove along its penetration direction can also accommodate the second fan 560, and the inner peripheral wall of the installation groove and the outer peripheral wall of the second fan 560 are tightly matched, and there is no need to set up a structure to fix the second fan 560.

[0046] It should be noted that the first fan 610 and the second fan 560 are both ordinary axial flow fans with low cost. The air inlet side of the second fan 560 faces the second heat exchange fin group 550, and the second heat exchange fin group 550 has a plurality of fins arranged horizontally and spaced along the height direction of the housing assembly 500. The first half housing 510 and the second half housing 520 are both provided with an air inlet 570 facing the end of the fin of the second heat exchange fin group 550. External air can enter from the air inlet 570, pass through the fins of the second heat exchange fin group 550, and then enter the air inlet side of the second fan 560 and be discharged.

[0047] See also Figure 2 and Figure 4In some embodiments of the utility model, in order to achieve rapid preheating of the inner tank 200, at least one PTC heater 700 located on the airflow path driven by the first fan 610 is provided in the heat preservation chamber 501. Compared with traditional heaters, the PTC heater 700 has high thermal efficiency, rapid heat generation, instant heating, continuous constant temperature, energy saving and power saving, and is not prone to aging, has a long service life, and is safer. Providing at least one PTC heater 700 on the airflow path driven by the first fan 610 can cooperate with the heating component to quickly generate a large amount of heat, thereby eliminating the need for users to wait for too long.

[0048] In some embodiments of the present invention, the heating component directly preheats the inner liner 200. Compared with the method of using heated air and the inner liner 200 for heat exchange, the heating component directly preheats the inner liner 200, which can heat the inner liner 200 more directly and quickly, thereby improving the preheating efficiency.

[0049] In some embodiments of the utility model, the inner tank 200 is in a rectangular cylindrical shape with four side panels connected in sequence, and the adjacent side panels are perpendicular to each other. The heating component includes four heating wires 420 respectively abutting against the outer side walls of the four side panels, and the heating wires 420 are serpentine-shaped along the height direction of the corresponding side panels. The upper end of the heating wire 420 is connected to the upper end of an adjacent heating wire 420, and the lower end of the heating wire 420 is connected to the lower end of another adjacent heating wire 420. The heating component composed of the heating wires 420 of the above structural layout can fully contact with the inner tank 200, has a large heat exchange area, can quickly increase the overall temperature of the inner tank 200 to a preset temperature, and the connection between the four heating wires 420 is very convenient, which is conducive to assembly production. Of course, in other embodiments, the shape of the inner liner 200 can also be other shapes, and the layout structure of the heating wire 420 attached to the outer wall of the inner liner 200 can also be completely different. For example, when the inner liner 200 is cylindrical, the heating wire 420 can be spirally coiled on the outer wall of the inner liner 200.

[0050] In some embodiments of the present invention, the heating component includes a graphene electric heating film, which is attached to the outer wall of the inner pot 200 to directly preheat the inner pot 200. Graphene has excellent thermal conductivity, and the graphene electric heating film made of graphene can generate a large amount of heat in seconds to heat the inner pot 200 to a preset temperature.

[0051] In some embodiments of the utility model, the inner liner 200 is connected to an exhaust assembly for extracting the internal gas of the inner liner 200. Food can be stored longer in a vacuum state, is not easy to spoil, and its flavor can be better guaranteed. When the opening of the inner liner 200 is closed by the switch door plate 300, the air in the inner liner 200 can be discharged by the exhaust assembly, and the refrigeration assembly cools the inner liner 200 synchronously, which is conducive to the preservation of food. Among them, the exhaust assembly includes an exhaust pump 810, a one-way valve 820, a pressure relief valve 830 and an exhaust pipe connected in sequence through a pipeline. The exhaust pipe is arranged on the switch door plate 300 and connected to the interior of the inner liner 200. The pressure relief valve 830 can connect the external gas and the pipeline to restore the interior of the inner liner 200 to a normal pressure state. When it is necessary to open the switch door panel 300 to expose the opening of the inner tank 200, since the inner tank 200 is in a vacuum state or a low-pressure state, the pressure difference between the inside and outside of the inner tank 200 is large, which makes it difficult for the user to directly open the switch door panel 300. At this time, it is only necessary to open the pressure relief valve 830, and the external air can enter the pipeline located on the side of the one-way valve 820 close to the inner tank 200, and then the air can be replenished into the inner tank 200 through the exhaust pipe. There is no need to set up an additional air supply device, which reduces costs and simplifies the structure of the anti-condensation food storage device.

[0052] The control method of the anti-condensation food storage device of the utility model comprises the following steps:

[0053] When receiving the command to open the inner liner 200, the refrigeration component is driven to stop working, and a command to input gas into the inner liner 200 is output to make the inner liner exit the vacuum state;

[0054] Receiving the detected air temperature information outside the inner tank 200, when it is determined that the temperature difference between the air temperature information and the temperature of the inner tank 200 reaches the start condition of the heating component, the heating component is controlled to preheat the inner tank 200 to a preset temperature;

[0055] When the inner pot 200 reaches a preset temperature, the switch door 300 is controlled to be in an openable state to take out the food;

[0056] When receiving the information that the switch door panel 300 is in the state of closing the inner tank 200, the heating component is driven to stop working, the cooling component is started, and the exhaust component is controlled to extract the gas inside the inner tank 200 until the inner tank 200 returns to the vacuum state and the low temperature constant state.

[0057] The control method of the anti-condensation food storage device first eliminates the vacuum state of the inner liner 200 and preheats the inner liner 200 to a preset temperature after inputting the instruction to open the inner liner 200. At this time, when the switch door panel 300 opens the inner liner 200, no condensation will occur, thereby preventing the food from getting damp and moldy, and ensuring the quality and life of the stored food. Moreover, before opening the inner liner 200, the inner liner 200 is in a vacuum state or a low-pressure state, and it is difficult to directly open the switch door panel 300. In the process of the inner liner 200 returning to normal pressure, the heating component works synchronously, and the user can take out the food without waiting for a long time. It should be noted that if the temperature difference between the room temperature and the temperature of the inner liner 200 does not reach the start-up condition of the heating component, or when the room temperature is lower than the temperature of the inner liner 200, the heating component does not need to be started.

[0058] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0059] Although the embodiments of the present invention have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A food storage device, characterized in that: include: An electrical appliance body (100), wherein an inner liner (200) with an opening is arranged in the electrical appliance body (100), a switch door plate (300) is arranged on the electrical appliance body (100) for opening or closing the opening of the inner liner (200), the electrical appliance body (100) is provided with a heat exchange module (400), the heat exchange module (400) comprises a refrigeration component for cooling the inner liner (200) and a heating component for heating the inner liner (200), the electrical appliance body (100) is provided with a first temperature sensing element for detecting the air temperature outside the inner liner (200), the first temperature sensing element, the refrigeration component and the heating component are all connected to a control module, and the control module can control the operation of the heating component according to the external air temperature detected by the first temperature sensing element to preheat the inner liner (200) to a preset temperature.

2. A food storage device according to claim 1, characterized in that: The first temperature sensing element detects an air temperature value A outside the inner container (200), and the preset temperature is A±3°C.

3. A food storage device according to claim 1, characterized in that: The heating component indirectly preheats the inner container (200) by heating air.

4. A food storage device according to claim 3, characterized in that: The heating component comprises a hot air inlet and a hot air outlet which are arranged on the switch door plate (300) and communicate with the interior of the inner tank (200), and a circulation fan which drives the hot air to circulate in the inner tank (200) is arranged between the hot air inlet and the hot air outlet.

5. A food storage device according to claim 3, characterized in that: The electrical appliance body (100) is provided with a shell assembly (500) on the periphery of the inner tank (200), and a sealed heat preservation cavity (501) is provided between the shell assembly (500) and the outer peripheral wall of the inner tank (200); the heat exchange module (400) comprises a semiconductor cooling plate (410) provided on the outer side of the inner tank (200), and the semiconductor cooling plate (410) has a first heat exchange end (411) located inside the heat preservation cavity (501) and a second heat exchange end (412) arranged opposite to the first heat exchange end (411) and located outside the heat preservation cavity (501).

6. A food storage device according to claim 5, characterized in that: The control module is capable of switching the direction of the current passing through the semiconductor refrigeration plate (410) so that the semiconductor refrigeration plate (410) cools or heats the inner tank (200); when the semiconductor refrigeration plate (410) cools the inner tank (200), the first heat exchange end (411) constitutes the refrigeration component; when the semiconductor refrigeration plate (410) heats the inner tank (200), the first heat exchange end (411) constitutes the heating component.

7. A food storage device according to claim 5, characterized in that: The shell assembly (500) has a housing cavity for accommodating the inner liner (200), and a plurality of supporting ridges (530) are arranged at intervals around the circumference of the housing cavity at the upper and lower parts of the housing cavity, and the supporting ridges (530) abut against the outer wall of the inner liner (200) to form the heat-insulating cavity (501), and air flow connecting ports (531) are provided between adjacent supporting ridges (530) to connect various positions of the heat-insulating cavity (501).

8. A food storage device according to claim 7, characterized in that: The semiconductor refrigeration sheet (410) is provided with two sheets, and the two sheets of the semiconductor refrigeration sheet (410) are respectively arranged at the upper part and the lower part of the same side of the inner liner (200), and a first fan (610) is provided between the two sheets of the semiconductor refrigeration sheet (410). The first fan (610) and the two first heat exchange ends (411) are provided with a guide air duct (620) located in the heat preservation cavity (501) and passing through the upper and lower parts. The guide air duct (620) is provided with an air inlet (621) horizontally facing the inner liner (200), and the air inlet side of the first fan (610) is directly opposite to the air inlet (621), and the air outlet side of the first fan (610) can drive two air flows to pass through the two first heat exchange ends (411) respectively and form a circulating flow.

9. A food storage device according to claim 8, characterized in that: The shell assembly (500) comprises a first half shell (510) and a second half shell (520) which can be assembled into a whole, the supporting ridge (530) is formed on the inner wall of the first half shell (510) or the inner wall of the second half shell (520), the first half shell (510) is provided with two first positioning half grooves (511) spaced apart from each other on the side facing the second half shell (520), the second half shell (520) is provided with two second positioning half grooves (521) corresponding to the first positioning half grooves (511) one by one, the first positioning half grooves (530) are provided with two first positioning half grooves (511) and two second positioning half grooves (521) corresponding to the first positioning half grooves (511) one by one, and the first positioning half grooves (530) are provided with two second positioning half grooves (521) corresponding to the first positioning half grooves (511) one by one. The first heat exchange end (411) and the corresponding second positioning half groove (521) jointly clamp and fix the edges of the semiconductor refrigeration plate (410), the first heat exchange end (411) is connected to a first heat exchange fin group (540) located in the guide air duct (620), the second heat exchange end (412) is connected to a second heat exchange fin group (550), the first positioning half groove (511) and the corresponding second positioning half groove (521) jointly clamp and fix a second fan (560), and the second fan (560) can drive airflow to pass through the second heat exchange fin group (550).

10. A food storage device according to claim 8, characterized in that: At least one PTC heating element (700) is provided in the heat preservation chamber (501) and is located on the air flow path driven by the first fan (610).

11. A food storage device according to claim 1, characterized in that: The heating component directly preheats the inner tank (200).

12. A food storage device according to claim 11, characterized in that: The inner tank (200) is in the shape of a rectangular tube and has four side panels connected in sequence, and the adjacent side panels are perpendicular to each other. The heating component includes four heating wires (420) respectively abutting against the outer side walls of the four side panels, and the heating wires (420) are serpentine-shaped along the height direction of the corresponding side panels. The upper end of the heating wire (420) is connected to the upper end of one adjacent heating wire (420), and the lower end of the heating wire (420) is connected to the lower end of another adjacent heating wire (420).

13. A food storage device according to claim 11, characterized in that: The heating component comprises a graphene electric heating film, and the graphene electric heating film is attached to the outer wall of the inner pot (200) to directly preheat the inner pot (200).

14. A food storage device according to claim 1, characterized in that: The switch door plate (300) is provided with an exhaust assembly for extracting the internal gas of the inner container (200); the exhaust assembly comprises an exhaust pump (810), a one-way valve (820), a pressure relief valve (830) and an exhaust pipe which are connected in sequence through a pipeline; the exhaust pipe is provided on the switch door plate (300) and communicates with the interior of the inner container (200); the pressure relief valve (830) can connect the external gas and the pipeline so that the interior of the inner container (200) can be restored to a normal pressure state.

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