Cabinet opening frost prevention method

Abstract

The invention discloses a refrigerator opening frost prevention method, and belongs to the field of refrigerators. The cabinet opening frost prevention method comprises the steps that a lining opening is constructed into an outer edge section, a heating section and an inner edge section which are sequentially connected, the outer edge section, the heating section and the inner edge section form a stepped structure, the outer edge section and the inner edge section are connected with side plates correspondingly, and the side plates are used for being connected with a shell; a heating piece and a heat conducting piece are arranged on the back face of the heating section, the heating piece and the compressor are started synchronously, and the heating piece transmits heat to the outer edge section and the inner edge section through the heat conducting piece to enable the lining opening temperature to be above the dew point; wherein the heating piece is attached to the heat conduction piece, and the heat conduction piece covers the heating section and at least covers partial areas of the outer edge section and the inner edge section. The technical problem of cabinet opening condensation is solved.

Description

Technical Field

[0001] The present application relates to the field of refrigerators, and in particular to a method for preventing frost at a refrigerator opening. Background Art

[0002] The freezer is a device for storing low-temperature food and other items. When the door is closed, the lining of the freezer is in contact with the door body. Due to the cold bridge phenomenon in the freezer, condensation and frost will form on the lining over a long period of time, and the contact part with the door body will freeze, making the door body difficult to open.

[0003] Anti-condensation subsystem and system freezer defrosting structure refrigeration equipment and lining heating device

[0004] For example, the German patent document (application number: DE3505759A) provides a cooling device, in particular a refrigerator, whose shell can be closed by a door, and the door is mounted on the door frame of the shell by a sealing profile attached to the circumferential closing edge of the door, which, under the action of a heater, forms a hollow profile from the door frame of the shell for supporting the sealing profile on the closing edge of the door. The hollow profile protrudes toward the door, into which a circumferential thermocouple element, in particular a heating wire, is inserted. The device attempts to solve the frosting problem by electrically heating the lining, but since its heating element is located in a cavity, the heating element cannot fully transfer heat to the lining, and the heat conduction efficiency is not high.

[0005] For the above problems, no effective solutions are provided in the related art. Summary of the invention

[0006] The main purpose of the present application is to provide a cabinet opening anti-frost method to solve the cabinet opening condensation problem.

[0007] To achieve the above-mentioned purpose, the cabinet opening anti-frost method of the present application includes: constructing the lining opening into an outer edge section, a heating section and an inner edge section which are connected in sequence, the outer edge section, the heating section and the inner edge section form a stepped structure, the outer edge section and the inner edge section are respectively connected with side panels, and the side panels are used to connect with the shell; a heating element and a heat conductive element are arranged on the back of the heating section, the heating element is turned on synchronously with the compressor, and the heating element transfers heat to the outer edge section and the inner edge section through the heat conductive element, so that the lining opening temperature is above the dew point; wherein the heating element is attached to the heat conductive element, and the heat conductive element covers the heating section and at least covers part of the outer edge section and the inner edge section.

[0008] Furthermore, the lower side of the heating section is configured to be inclined away from the outer edge section, so that the angle α between the heating section and the inner edge section is 95° to 130°.

[0009] Furthermore, the circumferential size of the heating element is constructed to be compatible with the size of the heating section; when the heating element is installed on the heating section, the heating element is placed around the circumference of the lining opening or is sleeved on the lining opening so that the heating section is stuck in the lining opening.

[0010] Furthermore, a notch is provided on the heat conductive member, and when the heat conductive member is installed on the back of the heating section, the notch is aligned with the bent portion of the lining, so that the heat conductive member is flatly attached to the heating section.

[0011] Furthermore, the width of the inner edge segment is smaller than the width of the outer edge segment, and the vertical distance between the outer edge segment and the inner edge segment is 5 mm to 30 mm.

[0012] Furthermore, the heat conductive member is disposed between the heating member and the heating section, so that the heat conductive member covers at least a partial area of ​​the heating member, and the covering length of the heat conductive member in the cross section is not less than 1 mm.

[0013] Furthermore, a resistance heating element is selected as the heating element and aluminum foil is selected as the heat conducting element, and adhesive is added to the inner surface of the heat conducting element so that the heat conducting element is attached to the outer edge section, the heating section and the back of the inner edge section through the adhesive.

[0014] Furthermore, a foam body is provided in the shell, and the foam body covers the back side of the lining.

[0015] Furthermore, the resistance heating element is turned off after working for a preset time, and the preset time is less than a single operation time of the compressor.

[0016] Furthermore, the tail end of the resistance heating element is folded back along the original extension direction to the vicinity of the head end, and the head end and the tail end are combined to form a wiring terminal.

[0017] Furthermore, the resistance heating element is packaged into aluminum foil through a coating film.

[0018] Furthermore, a heating tube is selected as the heating element, and the heating tube is connected to the refrigeration system, and the refrigeration medium flowing through the heating tube heats the lining port; the heating tube is a part of the condenser tube, and the condenser tube also includes a heat dissipation part, and the condensation medium flows through the heating tube and enters the heat dissipation part.

[0019] Furthermore, the shell is provided with an interaction device, and the interaction device is electrically connected to the heating element and can control the start or shut down of the heating element.

[0020] More specifically, some embodiments of the present application may produce the following specific beneficial effects:

[0021] The heating element can quickly transfer heat to the entire lining opening through the heat conductive element. That is, the heating element arranged in the heating section can transfer the heat it generates to the outer edge section and the inner edge section, so that the overall temperature of the lining opening is maintained above the dew point, preventing condensation and frost from forming on the cabinet opening and freezing to the door body. Moreover, the heating element is only arranged in some areas, so the energy consumption is low. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings constituting a part of this application are used to provide a further understanding of this application, so that other features, purposes and advantages of this application become more obvious. The schematic embodiment drawings and their descriptions of this application are used to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0023] Figure 1 This is a schematic diagram of the process of a cabinet opening anti-frost method according to an embodiment of the present application;

[0024] Figure 2 is a schematic diagram of the overall structure of a refrigerator according to an embodiment of the present application;

[0025] Figure 3 Yes Figure 2 Another perspective diagram of the refrigerator shown;

[0026] Figure 4 This is a schematic diagram of the matching structure of the lining and the shell according to an embodiment of the present application;

[0027] Figure 5 It is a schematic diagram of the exploded structure of the lining and the shell according to an embodiment of the present application;

[0028] Figure 6 is a schematic diagram of the overall structure of the lining according to an embodiment of the present application;

[0029] Figure 7 is a schematic diagram of a lining structure according to an embodiment of the present application;

[0030] Figure 8 This is a schematic diagram of the matching structure of a lining, a heating element and a heat conducting element according to an embodiment of the present application;

[0031] Fig. 9 This is a schematic diagram of another matching structure of a lining, a heating element and a heat conducting element according to an embodiment of the present application;

[0032] Fig.10 This is a schematic diagram of another matching structure of a lining, a heating element and a heat conducting element according to an embodiment of the present application;

[0033] Fig.11 It is a partial schematic diagram of the cooperation structure of a heating element and a heat conducting element according to an embodiment of the present application;

[0034] Fig.12 This is a schematic diagram of the coordination structure of a heating element and a heat conducting element according to an embodiment of the present application;

[0035] Fig.13 This is another schematic diagram of the matching structure of the lining, the heating element and the heat conducting element according to an embodiment of the present application;

[0036] Fig.14is a schematic diagram of a housing structure according to an embodiment of the present application;

[0037] Fig.15 It is a partial cross-sectional view of the door body and lining matching structure according to an embodiment of the present application;

[0038] Fig.16 This is a schematic diagram of the working process of a resistance heating element according to an embodiment of the present application;

[0039] Fig.17 is a schematic diagram of the heating tube structure according to an embodiment of the present application;

[0040] Reference numerals:

[0041] 100. Low temperature chamber;

[0042] 200, lining; 210, outer edge section; 220, inner edge section; 230, heating section; 240, side plate; 241, slot; 250, avoidance; 260, rounded corner structure;

[0043] 300, heating element;

[0044] 400, heat conducting member; 410, notch;

[0045] 500, shell; 510, inner wall; 520, outer wall; 530, thermal insulation layer;

[0046] 600, door body;

[0047] 700, refrigeration system; 710, condenser tube; 711, heating tube;

[0048] 800. Interactive device. DETAILED DESCRIPTION

[0049] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0050] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so as to describe the embodiments of the present application described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In order to solve the condensation problem of the cabinet opening in the related technology, combined with Figure 1 This embodiment provides a frost protection method for a cabinet opening of a refrigerator, wherein a lining opening 200 is constructed as an outer edge section 210, a heating section 230 and an inner edge section 220 which are connected in sequence, and the outer edge section 210, the heating section 230 and the inner edge section 220 form a stepped structure, and the outer edge section 210 and the inner edge section 220 are respectively connected with side panels 240, and the side panels 240 are used to be connected to the shell.

[0052] A heating element 300 and a heat conducting element 400 are disposed on the back of the heating section 230. The heating element 300 and the compressor 400 are turned on synchronously. The heating element 300 transfers heat to the outer edge section 210 and the inner edge section 220 through the heat conducting element 400, so that the temperature of the lining 200 is above the dew point. The heating element 300 is attached to the heat conducting element 400, and the heat conducting element 400 covers the heating section 230 and at least covers a portion of the outer edge section 210 and the inner edge section 220.

[0053] Combination Figure 2 and Figure 3 The refrigerator used may include the following structure, including a refrigeration system, a lining 200, a shell 500, a door 600 and an interactive device 800, which is provided with a low-temperature compartment 100 for storing items at low temperatures.

[0054] Combination Figures 4 to 8 The lining 200 in the cabinet opening anti-frost method of this embodiment is specifically a polygonal structure, which is used to cooperate with the shell 500. The lining is fixedly connected to the shell 500, and its front side at least partially contacts the door body 600, and its back side is opposite to the front side. The lining includes an outer edge section 210, a heating section 230 and an inner edge section 220 connected in sequence, and the outer edge section 210, the heating section 230 and the inner edge section 220 form a stepped structure. In the same vertical plane, the outer edge section 210 is higher than the inner edge section 220. The inner edge section 220 is closer to the low-temperature chamber 100 than the outer edge section 210.

[0055] A heating element 300 and a heat-conducting element 400 are arranged on the back of the heating section 230. The heating element 300 is attached to the heat-conducting element 400. The heat-conducting element 400 covers the heating section 230 and at least covers a portion of the outer edge section 210 and the inner edge section 220, that is, the heat-conducting element 400 may not completely cover the outer edge section 210 or the inner edge section 220, and the inner edge section 220 and the outer edge section 210 may only have a portion of the area with the heat-conducting element 400. It is worth noting that the "partial area" can be appropriately adjusted according to the heating efficiency of the heating element. In addition, the outer edge section 210 and the inner edge section 220 are respectively connected to a side plate 240, and the side plate 240 is used to connect to the shell 500. The inner edge section 220, the outer edge section 210, the heating section 230 and the side plate 240 can be integrally formed.

[0056] Since the longitudinal section of the lining is stepped, it has a good sealing effect, can hinder the circulation of cold air in the low-temperature chamber 100, and minimize the cold bridge phenomenon.

[0057] Preferably, the heat conducting member 400 covers most or all of the back surface of the heating section 230 , the back surface of the outer edge section 210 , and the back surface of the inner edge section 220 .

[0058] In this way, the heating element 300 quickly transfers the heat to the entire lining 200 through the heat conducting element 400, that is, the heating element 300 arranged in the heating section 230 can transfer the heat it generates to the outer edge section 210 and the inner edge section 220, so that the overall temperature of the lining 200 is maintained above the dew point, preventing condensation and frost on the cabinet opening and freezing with the door body 600. At the same time, the heating element is only arranged in the heating section, which reduces energy consumption.

[0059] The heating element can be a resistance heating element for electrical heating; a heating tube can also be used to heat the lining by using the refrigerant flowing through the heating tube, that is, heat is supplied by the refrigeration system to further reduce energy consumption. The heat-conducting element 400 can be an aluminum foil, or other metal foils such as copper foil, silver foil, and alloy foil. The heating element 300 is connected to the heat-conducting element 400, and the heat-conducting element 400 is fixed to the lining 200 by gluing. The heat-conducting element can be attached to the lining by adhesive, wherein the adhesive can be a common elastomeric pressure-sensitive adhesive or a resin pressure-sensitive adhesive. In order to further increase the thermal conductivity, the adhesive can also be a thermally conductive adhesive.

[0060] In some embodiments, the outer edge section 210 and the inner edge section 220 are connected via a heating section 230 , which may be a vertical plate.

[0061] Preferably, the lower side of the heating section 230 is inclined away from the outer edge section 210 so that the angle α between the heating section and the inner edge section is 95° to 130°.

[0062] like Figure 7 As shown, the lower side of the heating section 230 is inclined in a direction away from the outer edge section 210, and a slope is formed in the middle of the lining 200. The angle α between the heating section 230 and the outer edge section 210 generally has a reference range of 92° to 135°, for example, the angle can be 95°, 102°, 125°, or 132°.

[0063] Preferably, the angle α between the heating section 230 and the outer edge section 210 ranges from 95° to 130°. If the angle α is less than 95°, demoulding is relatively difficult. If it is larger, it may be necessary to reduce the size of the outer edge section 210 or the inner edge section 220, or increase some unnecessary compensation space.

[0064] As a preferred solution, Figure 7As shown, the width of the inner edge section 220 is smaller than that of the outer edge section 210. Within the given width of the lining 200, the outer edge section 210, as a sealing section cooperating with the door body 600, should be widened as much as possible to increase the sealing performance; at the same time, the width of the inner edge section 220 should be reduced to avoid reducing energy consumption due to the larger heat distribution of the inner edge section.

[0065] Combining the above implementation structure and Figure 1 , a feasible cabinet opening anti-frost method is:

[0066] Step 1: Define the lining structure and construct a refrigerator that meets the requirements.

[0067] During the manufacture of the refrigerator, the size and shape of the lining are limited to provide a basic structure for frost prevention, such as a stepped structure in which the width of the outer edge section is greater than the width of the inner edge section.

[0068] Step 2: Provide a heating element for the lining and use a heat-conducting element to conduct heat to improve the temperature environment on the lining surface.

[0069] In summer, when the temperature is high, frost is most likely to form. In inland areas of my country, the dew point temperature is generally between 15°C and 25°C in summer. Therefore, the surface temperature of the lining can be kept at around 25°C to 30°C by controlling the power of the heating element. Of course, for some areas with high humidity, the power of the heating element can be adaptively selected according to the local temperature conditions, without specific restrictions.

[0070] Step 3: Control the heating element to work synchronously with the compressor. In the cooling state, the heating element heats the heating section and transfers the heat to the outer edge section and the inner edge section through the heat conducting element, so that the surface temperature of the lining is increased to prevent frost.

[0071] In the non-refrigeration state, the stepped structure of the lining can prevent the internal cold air from leaking out, and the cold air is not easy to condense at the lining, thereby achieving a better anti-frost effect.

[0072] As a further supplement to step 1, when setting the door body, a sealing surface is formed at the portion corresponding to the door body and the outer edge section; and the heating section is also sealed, or a smaller gap is formed to enhance the sealing performance and further improve the anti-frost effect.

[0073] In some embodiments, the vertical distance between the outer edge segment 210 and the inner edge segment 220 may be 2 mm, 10 mm, 20 mm, or 32 mm.

[0074] Preferably, the vertical distance between the outer edge segment 210 and the inner edge segment 220 is in the range of 5 mm to 30 mm. Within this range, not only can the cold bridge phenomenon be partially reduced, but the heating element can also better transfer heat energy to the outer edge segment and the inner edge segment in the heating segment.

[0075] exist Figure 7 In the shown solution, the edges on the front side of the liner opening can all be rounded corner structures 260, which improves the comfort of users when using the freezer in daily life.

[0076] As Figure 5 shown, as an alternative solution, to facilitate the installation of the door body 600 to the housing 500, one side of the liner opening 200 has an avoidance opening 250, reserving sufficient space for the rotation of the door body 600.

[0077] As Figure 8 shown, the heat conducting member 400 is arranged between the heating member 300 and the heating section 230, so that the heat conducting member covers at least a partial area of the heating member, and the covering length of the heat conducting member in the cross section is not less than 1 mm, increasing heat conduction.

[0078] Optionally, as Fig. 9 shown, the heat conducting member 400 is single-layered and covers the heating member 300. At least most of the surface of the heating member 300 is wrapped by the heat conducting member 400 and is in close fit with the heating section 230, conducting heat to the liner opening 200 sufficiently.

[0079] Optionally, as Fig.10 shown, the heat conducting member 400 can be double-layered, and the heating member 300 is clamped between the heat conducting members 400.

[0080] As an alternative solution, the circumferential dimension of the heating member is constructed to be adapted to the dimension of the heating section; when the heating member is installed on the heating section, the heating member is arranged around the circumference of the liner opening or sleeved on the liner opening, so that the heating section is stuck on the liner opening. The heating member 300 is arranged around the circumference of the liner opening, making its structure match the liner opening. The heating member 300 can then be clamped to the heating section 230, improving the assembly stability of the heating member 300 and the heating section 230 and facilitating installation.

[0081] As an extended solution, the overall shape of the heating member 300 can be adaptively adjusted according to the shape of the liner opening 200, such as a rectangular frame, a "U"-shaped frame with a single-sided opening, a "日"-shaped frame with a middle beam, etc. Among them, the rectangular frame can have an opening due to the installation position or assembly form of the heating member 300, that is, a non-fully enclosed rectangle. There can also be multiple heating members 300 arranged side by side in the same plane, and the heating member 300 can also be divided into several segments and arranged along the circumference of the liner opening 200.

[0082] Since the liner opening is a polygonal structure and each side has a certain width, when bending, due to the different inner and outer circumferences, there will be some redundancy in the heat conducting member, and it cannot match the surface of the liner opening well, which will also affect the heat transfer of the heating member.

[0083] In order to solve the above problems, the cabinet opening anti-frost method of the present application also includes opening a notch on the heat conductive element. When the heat conductive element is installed on the back of the heating section, the notch is aligned with the bending part of the lining opening so that the heat conductive element is flatly attached to the heating section.

[0084] Therefore, if Fig.11 As shown, the heat conducting member between two adjacent sides of the lining is at least partially disconnected at the bend, so that the heat conducting member fits the lining as closely as possible. Specifically, when the heat conducting member is not installed to the lining, the heat conducting member has a notch 410, which can be completely disconnected or only partially connected at the inner edge section or the outer edge section.

[0085] As a solution, a resistance heating element is selected as the heating element, and an aluminum foil is selected as the heat conductor. Glue is added to the inner surface of the heat conductor so that the heat conductor is attached to the outer edge section, the heating section and the back of the inner edge section through the glue.

[0086] Furthermore, the resistance heating element is encapsulated in aluminum foil through a coating film, and the coating film is arranged on a side of the resistance heating element close to the heating section. The coating film can be made of aluminum foil, covering the resistance heating element, and coating the inside and outside of the resistance heating element to serve as a heat conductor.

[0087] Combining the above solutions, such as Fig.12 As shown, the heating element 300 includes a head end and a tail end. The tail end of the resistance heating element is folded back along the original extension direction to the vicinity of the head end, and wiring terminals are formed at the head end and the tail end for connecting to a power source.

[0088] As an alternative, the resistance heating element is a single-wire structure, which is unidirectionally wound to form a matching lining structure, and the head and tail ends are then connected to the wiring terminal. Multiple single-wire structures can also be set to be unidirectionally wound, without specific restrictions.

[0089] It is worth noting that the resistance heating element has an insulating structure, for example, the electric heating wire has a resistance wire inside and is covered with an insulating wire outside, which can be a cylindrical wire structure or a flat sheet structure.

[0090] In some other conceivable methods, the heating element is generally arranged to the inside or outside, which cannot solve the problem in this application well. The specific installation includes the following two methods:

[0091] The first type: the heating element 300 is arranged near the inner edge section 220, and the inner edge section 220 is connected to the outer edge section 210 through the transition section. Since the inner edge section 220 is closer to the low-temperature chamber 100 than the outer edge section 210 and the transition section, and the cold air leaks out from the low-temperature chamber 100, the cold air is heated as soon as it passes through the inner edge section 220, which improves the efficiency to a certain extent. However, since the heating element 300 is too close to the low-temperature chamber 100, the power consumption of the low-temperature chamber 100 will be increased, which is not conducive to energy saving, and the life of the heating element 300 will be shortened accordingly.

[0092] The second type: the heating element 300 is arranged on the outer edge section 210, and the inner edge section 220 is connected to the outer edge section 210 through a transition section. Although a partial anti-frost effect can be achieved, when the heat-conducting element located at the outer edge section 210 transfers heat to the inner edge section 220, the temperature of the inner edge section 220 will be reduced to the dew point with a greater probability, causing condensation and frosting at the inner edge section 220. Frost gradually accumulates at the inner edge section 220, which will still cause the door body and the lining to freeze together, making it difficult to open, and it is time-consuming and laborious for users to clean the frost.

[0093] In the present application, a heating element is arranged in the middle heating section, and the back of the lining is covered with a heat conductive element, so that heat is conducted to both sides through the heat conductive element, making it difficult for condensation and frost to form on the entire lining surface.

[0094] like Fig.13 As shown in the figure, as another solution, a heating element 300 and a heat conducting element 400 are arranged on the back of the lining, the heating element is attached to the heat conducting element 400, and the heat conducting element 400 covers the outer edge section 210, the heating section 230 and the inner edge section 220, and can simultaneously conduct heat to the outer edge section 210, the heating section 230 and the inner edge section 22. It is worth noting that this solution does not impose specific restrictions on the heating element 300, and the corresponding anti-frost effect can also be achieved by covering the entire back of the lining with the heat conducting element and combining it with the stepped structure of the lining.

[0095] In combination with the above lining implementation method, as an implementation structure of the refrigerator, it includes a refrigeration system, a door body, and a shell 500, wherein the shell 500 is formed with an installation space for installing the refrigeration system, and the door body 600 is movably connected to the shell 500 and can be hinged to the shell 500.

[0096] like Fig.14 As shown, the shell 500 includes an inner wall 510 and an outer wall 520 , the inner wall 510 forms the low temperature chamber 100 , a heat insulation layer 530 is arranged between the inner wall 510 and the outer wall 520 , and the heat insulation layer 530 covers the back of the liner.

[0097] Among them, as an implementation of the refrigeration system, it includes a compressor, a condenser, a throttling mechanism and an evaporator, and a condensing pipe is connected between the compressor and the condenser for conveying the condensing medium. Specifically, the working process of the refrigeration system is: after the refrigerator is powered on, if the low-temperature chamber 100 does not reach the predetermined temperature, the contact of the thermostat therein is connected, the compressor starts to enter the working state, and the low-temperature and low-pressure condensing medium is sucked into the compressor, and after being compressed into a high-temperature and high-pressure hot gas in the compressor cylinder, it enters the condenser through the condensing pipe. The high-temperature and high-pressure condensing medium gas dissipates heat through the condenser, and the temperature gradually decreases, and is slowly cooled to a saturated steam at a normal temperature and high pressure, and further cooled to a saturated liquid, and the temperature no longer decreases, and the pressure of the condensing medium is almost unchanged during the entire condensation process. The condensed condensing medium flows into the throttling mechanism, and the throttling mechanism is used to throttle and reduce the pressure of the condensing medium, and the condensing medium becomes a wet steam at a normal temperature and low pressure. The condensing medium begins to absorb heat and vaporize in the evaporator, which reduces the temperature of the evaporator and the surrounding area. The condensing medium then becomes a low-temperature, low-pressure gas. The condensing medium coming out of the evaporator returns to the compressor for the next cycle.

[0098] In specific implementation, other existing refrigeration system structures may be used, the main purpose of which is to achieve refrigeration of the low-temperature chamber 100, and there is no specific limitation on the relevant implementation structure.

[0099] In some embodiments, the heat insulating layer 530 is a foam. In the production process of the refrigerator, after the lining 200 is installed on the shell 500, the raw materials such as the combined polyether and the foaming agent are injected between the inner wall 510 and the outer wall 520 through professional equipment according to the basic process requirements. After the foaming is completed, the viscous raw material becomes a solid foam with a honeycomb or porous structure, which completely covers the heating element 300 and the heat conducting element 400, not only providing good support for the heating element 300 and the heat conducting element 400 to prevent them from falling off from the back of the lining 200 due to gravity or other reasons, but also having stable heat preservation performance, reducing heat loss, and having excellent anti-dew and anti-frost effects.

[0100] Regarding the connection between the shell and the lining, as an implementation scheme, the two side plates 240 of the lining are formed with slots, and the upper ends of the inner wall 510 or the outer wall 520 are matched with the slots 241. In other embodiments, only the inner wall 510 is matched with the slots, and the outer wall can form a bent section, which is pressed against the bottom surface of the lining and fits with the side plates.

[0101] Furthermore, if Fig.15 As shown, the lower side of the inner wall of the slot 241 expands outward, specifically, the slot 241 where the lining and the outer wall 520 cooperate is opened outward, wherein the outer edge of the side plate near the low-temperature chamber is inclined toward the low-temperature chamber, which is conducive to the rapid assembly of the outer wall 520 and the lining.

[0102] Optionally, in order to further prevent the foam from leaking out during the molding process, the upper side of the slot 241 is partially contracted to limit the unmolded foam.

[0103] More specifically, when a resistance heater is used as the heating element, the resistance heater and the compressor may start or shut down synchronously, which may cause the heater to work too long in one cycle, greatly reducing its life or even causing it to be scrapped. Since the foam is tightly connected to the resistance heater, users also face great challenges in subsequent disassembly and maintenance. The lining 200 is also prone to yellowing and aging when it is heated for a long time, resulting in appearance defects.

[0104] Therefore, in order to overcome the above problems, Fig.16 As shown, considering that the resistance heating element can meet the anti-frost requirement after working for a preset time, the resistance heating element in this embodiment is turned on synchronously with the compressor and automatically stops working after a preset time. Combined with the temperature storage function of the foam body, the lining 200 can still maintain a temperature above the dew point before the next compressor starts. Among them, the preset time is less than the single operation time of the compressor, which is energy-saving and environmentally friendly, and can further ensure the service life of the resistance heating element and the aesthetics of the lining 200. It is worth noting that the "preset time" here needs to be specifically set according to the actual power of the resistance heating element and the working conditions of the refrigerator.

[0105] As a specific solution, the resistance heating element can be an electric heating wire or an electric heating sheet, or a resistance heating element after electrode packaging. The heat conductive element is aluminum foil, and the inner surface of the heat conductive element has a rubber material, which is attached to the outer edge section, the heating section and the back of the inner edge section. More specifically, the resistance heating element includes or is covered with an insulating layer, and the "covering" here can be direct covering or indirect covering. In order to further increase the thermal insulation, a thermal insulation layer can be provided on the side of the aluminum foil away from the heating section.

[0106] As an implementation method, the resistance heating element adopts a heating wire wrap structure, the tail end is folded back along the original extension direction to the vicinity of the head end, and the head end and the tail end are combined into a terminal, which is connected to the power supply. As an expansion solution, a coating film is provided on the side of the heating wire close to the heating section, and the electric heating wire is encapsulated to the aluminum foil through the coating film, so that the relative position of the heating wire and the aluminum foil is fixed, which is convenient for installation.

[0107] More specifically, the resistance heating element does not need to be additionally installed with a grounding wire. When a risk of leakage occurs, the current can flow to the insulation layer and the grounding function can be achieved through the grounding path in the original refrigeration system.

[0108] As another alternative, Fig.17As shown, a heating pipe 711 is selected as the heating element 300 and connected to the refrigeration system 700. The condensing pipe 710 also has a heat dissipation portion (not shown in the figure) surrounding the shell 500. The condensing medium flows out from the compressor, flows through the heating pipe 711, and then enters the heat dissipation portion. That is, the condensing pipe 710 first passes through the lining 200. In this way, when the condensing medium is used as a heat source for the heating element 300, it still has a high heat. At the same time, it transfers heat to the lining 200, and the condensing medium loses part of its heat. The condensing medium then enters the heat dissipation portion located in the shell 500, reducing the impact on the low-temperature chamber 100, and the condensing medium fully dissipates heat. As an optional solution, the condensing medium can pass through a temperature regulating device, such as a fan, before entering the lining 200 to regulate the temperature of the condensing medium to prevent the lining 200 from being too high.

[0109] Due to factors such as ambient temperature, air pressure, and air humidity, for example, in winter or in some plateau areas, condensation is not easy to form on the door opening of the freezer. If the heating element 300 is always in operation, energy will be wasted.

[0110] As a preferred solution, in order to meet the needs of different users, the outer wall 520 of the refrigerator in this embodiment is provided with an interactive device 800, which is electrically connected to the heating element 300 and can control the start or shut down of the heating element 300. It is worth noting that the "start or shut down" here refers to the overall control switch of the heating element 300. When it is in the "on" state, the heating element 300 will work with the compressor to transfer heat to the lining 200; when it is in the "off" state, the heating element 300 will not start with the compressor.

[0111] The interactive device 800 can be a touch panel, which is an inductive liquid crystal display device that can receive input signals such as contacts. When the user needs the refrigerator to enter the "anti-frost" state, he can touch the graphic button represented by "anti-frost" on the screen, so that the tactile feedback system on the screen can drive various connection devices according to the pre-programmed program to start the heating element 300, and through the display screen, it is created that the refrigerator is in the "anti-frost state", and the lining 200 always maintains a temperature above the dew point. If the user does not need it, he can touch the graphic button again to turn off the heating element 300.

[0112] The tactile feedback system and the corresponding program can be implemented using existing programming languages, mainly by inputting corresponding control instructions. Since the present application is for structural improvement, the content will not be repeated here.

[0113] As an extension solution, the interactive device 800 can also represent a mechanical button panel, which can be an independent, cantilever, silicone or membrane button. According to different product requirements and the specific assembly structure of the heating element 300, a display light can be added to the button itself or near it to indicate the state of the refrigerator. The interactive device 800 can also be a joystick or a knob.

[0114] More specifically, since the user does not need to use the interactive device 800 frequently, the interactive device 800 is disposed on the lower side of the housing 500 to meet the user's operating habits.

[0115] In this application, the terms "installed", "set", "provided with", "connected", "connected", and "socketed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection, or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, elements, or components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0116] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A cabinet opening anti-frost method, characterized in that: The lining is structured into an outer edge section, a heating section and an inner edge section which are connected in sequence, wherein the outer edge section, the heating section and the inner edge section form a stepped structure, and the outer edge section and the inner edge section are respectively connected with side plates, and the side plates are used to be connected to the shell; A heating element and a heat conducting element are arranged on the back of the heating section. The heating element is turned on synchronously with the compressor. The heating element transfers heat to the outer edge section and the inner edge section through the heat conducting element, so that the lining port temperature is above the dew point. Wherein, the heating element is attached to the heat-conducting element, and the heat-conducting element covers the heating section and at least covers a portion of the outer edge section and the inner edge section.

2. The cabinet opening anti-frost method according to claim 1, characterized in that: The lower side of the heating section is configured to be inclined in a direction away from the outer edge section, so that an included angle α between the heating section and the inner edge section is 95° to 130°.

3. The cabinet opening anti-frost method according to claim 1, characterized in that: The circumferential size of the heating element is configured to be compatible with the size of the heating section; When the heating element is installed on the heating section, the heating element is placed around the circumference of the lining opening or sleeved on the lining opening, so that the heating section is clamped on the lining opening.

4. The cabinet opening anti-frost method according to claim 1, characterized in that: A notch is provided on the heat conducting member. When the heat conducting member is installed on the back of the heating section, the notch is aligned with the bent portion of the lining so that the heat conducting member is flatly attached to the heating section.

5. The cabinet opening anti-frost method according to claim 1, characterized in that: The width of the inner edge segment is smaller than the width of the outer edge segment, and a vertical distance between the outer edge segment and the inner edge segment is 5 mm to 30 mm.

6. The cabinet opening anti-frost method according to claim 1, characterized in that: The heat conducting member is arranged between the heating member and the heating section, so that the heat conducting member at least covers a part of the heating member, and the covering length of the heat conducting member in the cross section is not less than 1 mm.

7. The cabinet opening anti-frost method according to claim 1, characterized in that: A resistance heating element is selected as the heating element and aluminum foil is selected as the heat conducting element. Glue is added to the inner surface of the heat conducting element so that the heat conducting element is attached to the outer edge section, the heating section and the back of the inner edge section through the glue.

8. The cabinet opening anti-frost method according to claim 7, characterized in that: The shell has a foam body inside, and the foam body covers the back side of the lining.

9. The cabinet opening anti-frost method according to claim 8, characterized in that: The resistance heating element is turned off after working for a preset time, and the preset time is less than a single operation time of the compressor.

10. The cabinet opening anti-frost method according to claim 7, characterized in that: The tail end of the resistance heating element is folded back to the vicinity of the head end along the original extension direction, and the head end and the tail end are combined to form a wiring terminal.

11. The cabinet opening anti-frost method according to claim 7, characterized in that: The resistance heating element was encapsulated to the aluminum foil by a covering film.

12. The cabinet opening anti-frost method according to claim 1, characterized in that: A heating tube is selected as the heating element, which is connected to the refrigeration system, and the refrigeration medium flowing through the heating tube heats the lining port; the heating tube is a part of the condenser tube, and the condenser tube also includes a heat dissipation part, and the condensation medium flows through the heating tube and enters the heat dissipation part.

13. The cabinet opening anti-frost method according to claims 1 to 12, characterized in that: The shell is provided with an interaction device, which is electrically connected to the heating element and can control the start or shut down of the heating element.

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