A dual system refrigerator with dual temperature spaces

Abstract

The application discloses a double-system refrigerator with double variable-temperature spaces, which comprises a shell, a refrigeration air duct, a freezing air duct, a first variable-temperature space, a first variable-temperature air duct, a first air door, a second variable-temperature space, a second variable-temperature air duct and a second air door, and the shell is internally provided with the refrigeration air duct and the freezing air duct; the two ends of the first variable-temperature air duct are respectively connected with the refrigeration air duct and the first variable-temperature space, the first variable-temperature air duct is internally provided with the first air door for controlling the on-off, the two ends of the second variable-temperature air duct are respectively connected with the freezing air duct and the second variable-temperature space, and the second variable-temperature air duct is internally provided with the second air door; the scheme reuses the refrigeration and freezing system cold energy to supply cold to the two variable-temperature spaces, does not need to additionally arrange an evaporator and supporting pipeline components for the variable-temperature spaces, simplifies pipeline layout, reduces parts and pipeline joints, simplifies an assembly process, reduces the production cost of the whole machine, realizes accurate temperature control of the double independent temperature zones, and adapts to diversified and fine preservation requirements of food materials.

Description

Technical Field

[0001] This invention relates to the field of refrigerator technology, and more specifically to a dual-system refrigerator with dual variable temperature spaces. Background Technology

[0002] With the diversification of users' needs for food preservation, existing refrigerators generally feature dual-temperature compartments. Currently, most temperature-controlled compartments employ a multi-evaporator independent refrigeration solution. For example, the invention patent with publication number CN105650973A discloses "a dual-temperature-controlled refrigerator," in which evaporators are installed in both the first and second temperature-controlled compartments. Each evaporator requires separate matching of corresponding refrigeration pipes, connecting pipes, and control components, resulting in a complex pipe layout and a large number of pipe joints. This leads to cumbersome assembly processes, low production efficiency, and a significant increase in the overall production cost.

[0003] Therefore, existing technologies still need to be improved and developed. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of this invention is to provide a dual-system refrigerator with dual variable temperature space, which aims to solve the problem that the existing dual variable temperature refrigerators use an independent evaporator for cooling in the variable temperature space, resulting in complicated assembly procedures and high production costs.

[0005] The technical solution adopted by this invention to solve the technical problem is as follows: A dual-system refrigerator with dual variable temperature compartments, comprising: The outer shell has a refrigeration air duct and a freezing air duct inside; The first temperature-changing space is located inside the outer casing; The first variable temperature air duct is connected at one end to the refrigeration air duct and at the other end to the first variable temperature space. The first damper is installed inside the first variable temperature air duct and is used to open or close the first variable temperature air duct. The second temperature-changing space is disposed inside the outer shell and arranged side by side with the first temperature-changing space; The second variable temperature air duct is connected at one end to the refrigeration air duct and at the other end to the second variable temperature space. The second damper is located inside the second variable temperature air duct and is used to open or close the second variable temperature air duct.

[0006] Furthermore, it also includes: The cold storage compartment is located inside the outer shell; The first temperature-changing space and the second temperature-changing space are slidably arranged side by side inside the refrigerator compartment.

[0007] Furthermore, temperature sensing probes are installed in both the first and second temperature-changing spaces.

[0008] Furthermore, it also includes: A refrigerated air duct panel is installed on the rear side of the refrigerated compartment; A refrigerated evaporator is installed on the refrigerated air duct plate; Both the refrigerated air duct and the first variable temperature air duct are located on the refrigerated air duct plate.

[0009] Furthermore, the first damper includes: A first groove plate is disposed within the first variable temperature air duct; a first mounting groove is provided on the side wall of the first variable temperature air duct, and the first groove plate is located within the first mounting groove. A first sealing plate is disposed on one side of the first groove plate and is sealed to the inner wall of the first temperature-controlled air duct; a first through hole is provided in the middle of the first sealing plate. A first drive motor is disposed within the first slot plate; A first rotating plate is rotatably disposed on one side of the first groove plate; a first drive motor is connected to the first rotating plate and is used to drive the first rotating plate to rotate, so as to open or close the first through hole.

[0010] Furthermore, it also includes: A freezer compartment is disposed within the outer shell and located at the bottom of the refrigerator compartment; A refrigeration air duct plate is disposed on the rear side of the refrigeration chamber; the refrigeration air duct is disposed on the refrigeration air duct plate, and a first air outlet connected to the second variable temperature air duct is disposed on the top of the refrigeration air duct plate.

[0011] Furthermore, the second variable temperature air duct is located within the foam layer between the refrigerator compartment and the freezer compartment.

[0012] Furthermore, the second variable temperature air duct includes a left half shell and a right half shell. Each half shell and the right half shell has a channel on the opposite side. The two channels cooperate to form an air outlet channel, which is used to deliver the cold air from the refrigeration air duct to the second variable temperature space.

[0013] Furthermore, the second damper includes: The second groove plate is disposed inside the right half of the shell; The second sealing plate is disposed on one side of the second groove plate and is sealed to the inner wall of the second temperature-controlled air duct; a second through hole is provided in the middle of the second sealing plate; The second drive motor is disposed inside the second slot plate; The second rotating plate is rotatably disposed on one side of the second groove plate; the second drive motor is connected to the second rotating plate and is used to drive the second rotating plate to rotate, so as to open or close the second through hole.

[0014] Furthermore, the right half of the housing has a slot on its side wall, and the left half of the housing has a block on its side wall. The block engages with the slot to connect the left half of the housing to the right half of the housing.

[0015] Compared with the prior art, the beneficial effects of the present invention are: In this invention, by adding independent first and second variable temperature air ducts and matching dampers to the existing dual refrigeration system of refrigeration and freezing, the cooling capacity of the two systems is reused to supply the two variable temperature spaces. There is no need to add an evaporator, matching pipelines and control components to each variable temperature space. This overcomes the shortcomings of existing dual variable temperature refrigerators with multiple evaporators, which have complicated pipelines, many assembly processes and high production costs. It can greatly simplify the overall refrigeration pipeline layout, reduce the number of pipeline joints and matching parts, simplify the assembly process of the production line and improve assembly efficiency, while reducing the overall production cost of the refrigerator. It can also achieve precise temperature control of two independent temperature zones, and take into account the refined preservation needs of diverse foods. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of the first and second variable temperature spaces of the present invention.

[0017] Figure 2 This is a schematic diagram of the first and second variable temperature air ducts of the present invention.

[0018] Figure 3 This is a schematic diagram of the first damper structure of the present invention.

[0019] Figure 4 This is a schematic diagram of the second damper and the right half of the shell structure of the present invention.

[0020] Figure 5 This is a schematic diagram of the outer shell structure of the present invention.

[0021] The numbers in the diagram represent: 1. Outer shell; 11. Refrigerator compartment; 12. Freezer compartment; 13. Refrigerator air duct plate; 14. Refrigerator evaporator; 15. Freezer air duct plate; 2. First variable temperature space; 3. First variable temperature air duct; 4. First air damper; 41. First slot plate; 42. First sealing plate; 43. First rotating plate; 5. Second variable temperature space; 6. Second variable temperature air duct; 61. Left half shell; 62. Right half shell; 7. Second air damper; 71. Second slot plate; 72. Second sealing plate; 73. Second rotating plate. Detailed Implementation

[0022] To make the objectives, technical solutions, and effects of this invention clearer and more explicit, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0023] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined with "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0025] In view of the shortcomings of the prior art, this embodiment provides a dual-system refrigerator with dual variable temperature space, as detailed below: As attached Figure 1 and attached Figure 5As shown, a dual-system refrigerator with dual variable temperature spaces includes an outer shell 1, a refrigerator air duct, a freezer air duct, a first variable temperature space 2, a first variable temperature air duct 3, a first air damper 4, a second variable temperature space 5, a second variable temperature air duct 6, and a second air damper 7. The outer shell 1 serves as the main housing, and internally has two independent air supply channels: a refrigerator air duct and a freezer air duct, corresponding to the refrigerator and freezer refrigeration systems, respectively. The first variable temperature space 2 is located inside the outer shell 1 and is used to achieve variable temperature storage in the upper-zero range. One end of the first variable temperature air duct 3 is connected to the refrigerator air duct, and the other end is connected to the first variable temperature space 2, serving as the air supply channel for the refrigerator system. The first variable temperature space 2 is a dedicated channel for delivering cold air; the first damper 4 is installed inside the first variable temperature air duct 3 to control the opening and closing of the first variable temperature air duct 3 and adjust the air volume; the second variable temperature space 5 is arranged side by side with the first variable temperature space 2 inside the outer shell 1 to achieve variable temperature storage in the sub-zero range; one end of the second variable temperature air duct 6 is connected to the refrigeration air duct, and the other end is connected to the second variable temperature space 5, serving as a dedicated channel for the refrigeration system to deliver cold air to the second variable temperature space 5; the second damper 7 is installed inside the second variable temperature air duct 6 to control the opening and closing of the second variable temperature air duct 6 and adjust the air volume.

[0026] The refrigerator consists of several components: the outer shell 1 serves as the external support and insulation shell, while the interior is divided into different functional compartments by a foam layer; the refrigeration air duct is the main air supply channel of the refrigeration system, carrying the cold air generated by the refrigeration evaporator 14 to cool each space in the refrigeration compartment; the freezer air duct is the main air supply channel of the freezer system, carrying the cold air generated by the freezer evaporator to cool each space in the freezer compartment; the first variable temperature space 2 is an independent variable temperature compartment refrigerated by the refrigeration system, with a temperature range of 0℃-4℃, suitable for precise preservation of fruits, vegetables, dairy products, and other food items; and the first variable temperature air duct 3 connects the main refrigeration air duct and the first variable temperature space 2. The system features a dedicated bypass air duct for directional delivery of cold energy; the first damper 4 is an actuator that controls the opening and closing of the first variable temperature air duct 3, adjusting the amount of cold energy delivered to the first variable temperature space 2 by opening and closing; the second variable temperature space 5 is an independent variable temperature chamber supplied by the refrigeration system, with a temperature range covering -4℃ to 0℃, suitable for the needs of meat micro-freezing and chilled storage; the second variable temperature air duct 6 is a dedicated bypass air duct connecting the main refrigeration air duct and the second variable temperature space 5, enabling upward delivery of refrigerated cold energy; the second damper 7 is an actuator that controls the opening and closing of the second variable temperature air duct 6, adjusting the amount of cold energy delivered to the second variable temperature space 5 by opening and closing.

[0027] Specifically, during operation, the cold air generated by the refrigeration system circulates within the refrigeration duct. When the first variable temperature space 2 needs cooling, the first damper 4 automatically opens, and some of the cold air in the refrigeration duct is sent into the first variable temperature space 2 through the first variable temperature duct 3. Once the first variable temperature space 2 reaches the set temperature, the first damper 4 automatically closes, stopping the cooling supply. Simultaneously, the cold air generated by the freezing system circulates within the freezing duct. When the second variable temperature space 5 needs cooling, the second damper 7 automatically opens, and some of the cold air in the freezing duct is sent into the second variable temperature space 5 through the second variable temperature duct 6. Once the second variable temperature space 5 reaches the set temperature, the second damper 7 automatically closes, stopping the cooling supply. The two variable temperature spaces reuse the original refrigeration and freezing systems of the refrigerator for cooling, each adjusting independently without interfering with the other, eliminating the need for additional independent evaporators and refrigeration circuits.

[0028] Compared to existing technologies, current dual-temperature refrigerators mostly employ a multi-evaporator independent refrigeration scheme. Each temperature-changing compartment requires a separate evaporator, refrigeration pipes, connecting fittings, and control components, resulting in a complex overall piping layout, numerous pipe joints, cumbersome assembly processes, low production efficiency, and a significant increase in overall production costs. This solution reuses the refrigerator's original refrigeration and freezing systems, supplying cooling to the two temperature-changing compartments through independent variable-temperature air ducts and independent dampers. It eliminates the need for additional evaporators and matching refrigeration pipes, fundamentally solving the core problems of complex piping, difficult assembly, and high production costs associated with dual-temperature refrigerators.

[0029] Through the above technical solution, this application adopts a combination structure of dual-system reuse + independent variable temperature air duct + independent air damper. Without adding an evaporator and refrigeration circuit, it realizes independent cooling and independent temperature control of two variable temperature spaces, which greatly simplifies the overall pipeline layout, reduces the number of pipeline joints, and reduces assembly difficulty and production cost. At the same time, the two variable temperature spaces are adapted to the cooling characteristics of the refrigeration and freezing systems respectively, and can cover different temperature zones of 0℃-4℃ and -4℃-0℃, which broadens the variable temperature range of the refrigerator compartment 11 and improves the temperature zone flexibility and food preservation ability of the refrigerator.

[0030] In this embodiment, as shown in the appendix Figure 5 As shown, a dual-system refrigerator with dual temperature-changing spaces also includes a refrigerator compartment 11, which is located inside the outer shell 1. A first temperature-changing space 2 and a second temperature-changing space 5 are slidably arranged side-by-side inside the refrigerator compartment 11. The refrigerator compartment 11 serves as the main compartment for above-zero temperature preservation, occupying the upper area inside the outer shell 1. The first temperature-changing space 2 and the second temperature-changing space 5 are arranged side-by-side and installed inside the refrigerator compartment 11 by a sliding mechanism, sharing the same door. Users can open the refrigerator compartment 11 door to access food in both temperature-changing spaces.

[0031] Among them, the sliding setting refers to the use of a drawer-type sliding rail installation structure for the variable temperature space, which can be pulled out and pushed back to close in the horizontal direction, so that food can be stored and retrieved without opening a separate cabinet door; the side-by-side arrangement means that two variable temperature spaces are arranged adjacent to each other inside the refrigerator 11, making full use of the horizontal space of the refrigerator 11, with a compact layout and high space utilization.

[0032] Through the above technical solution, the two variable temperature compartments are integrated into the refrigerator compartment 11 in the form of side-by-side pull-out drawers, making full use of the unused space inside the refrigerator compartment 11. There is no need to add an additional independent compartment and door, which reduces the overall size of the refrigerator and improves the effective volume utilization rate of the refrigerator. At the same time, users can open the refrigerator compartment 11 door to store and retrieve food from the two variable temperature compartments. The operation is convenient, reduces the number of times the door is opened and the loss of cold air, and improves the convenience of use and energy saving effect.

[0033] In this embodiment, temperature sensors are installed in both the first variable-temperature space 2 and the second variable-temperature space 5. Each of the two variable-temperature spaces is independently equipped with its own temperature sensor, which collects the internal temperature data of the corresponding compartment in real time, providing accurate temperature data for the control of their respective dampers, and realizing independent and precise temperature control of the two variable-temperature spaces.

[0034] Among them, the temperature sensing probe is a temperature detection element that uses the thermistor principle. It has the characteristics of high detection accuracy and fast response speed and is the core data acquisition component of the refrigerator temperature control system. Each temperature-changing space is independently equipped with a probe, which can obtain its own real-time temperature. This avoids the temperature detection deviation and temperature control asynchrony problems caused by sharing probes and provides data support for independent temperature adjustment.

[0035] Specifically, during assembly, a temperature sensor is installed in the middle of the side wall inside the first temperature-changing space 2, avoiding the area directly blown by the air outlet, to accurately detect the average air temperature inside the space; another temperature sensor is installed in the corresponding position inside the second temperature-changing space 5, also avoiding the area directly blown by the air outlet; the two sensors are electrically connected to the refrigerator's main control board. During operation, the sensors collect the temperature data of the corresponding temperature-changing space in real time and transmit it to the main control board. The main control board sends an opening angle signal and an opening duration signal to the corresponding damper based on the difference between the user-set temperature and the actual temperature, adjusting the air volume to stabilize the room temperature within the set range.

[0036] Through the above technical solution, each of the two variable temperature spaces is equipped with an independent temperature sensing probe, which can accurately collect their internal temperature in real time, providing accurate temperature basis for the independent adjustment of the damper, greatly improving the temperature control accuracy of each variable temperature space, reducing the temperature fluctuation range, better matching the preservation temperature requirements of different ingredients, and improving the preservation effect and storage time of the ingredients.

[0037] In this embodiment, as shown in the appendix Figure 1 and attached Figure 2 As shown, a dual-system refrigerator with dual variable temperature space also includes a refrigerator air duct plate 13, which is located on the rear side of the refrigerator compartment 11; a refrigerator evaporator 14 is located on the refrigerator air duct plate 13, and both the refrigerator air duct and the first variable temperature air duct 3 are located on the refrigerator air duct plate 13; an integrated refrigerator air duct plate 13 is provided on the rear side of the refrigerator compartment 11, and the refrigerator evaporator 14 is fixedly installed on the back area of ​​the refrigerator air duct plate 13. The main refrigerator air duct and the first variable temperature air duct 3 are integrated on the plate body of the refrigerator air duct plate 13 to form a modular refrigerator air supply system that can be assembled and maintained as a whole.

[0038] Among them, the refrigerated air duct plate 13 is a plate carrier that integrates the refrigerated air duct and installation components. It is made of food-grade plastic injection molding and has the dual functions of air duct guidance and component installation. It is the integrated base of the refrigerated air supply system. The refrigerated evaporator 14 is the core heat exchange component of the refrigeration system. It absorbs the heat of the surrounding air through refrigerant evaporation to generate cold air and provide a cold source for the refrigerated area. The air duct integration design means that the main refrigerated air duct and the first variable temperature air duct 3 are integrated on the same air duct plate. There is no need to set up separate air duct components. The structure is compact and highly integrated.

[0039] Through the above technical solution, the integrated refrigerated air duct plate 13 realizes the integrated integration of the refrigerated evaporator 14, the main air duct, and the variable temperature air duct, which greatly reduces the number of parts in the refrigerated air supply system, simplifies the assembly process, and improves production efficiency; at the same time, the integrated air duct has fewer connections and better sealing performance, which effectively reduces the loss of cold energy caused by air leakage, improves refrigeration efficiency, and reduces the energy consumption of the whole machine.

[0040] In this embodiment, as shown in the appendix Figure 2 and attached Figure 3 As shown, the first damper 4 includes a first groove plate 41, a first sealing plate 42, a first drive motor, and a first rotating plate 43. A first mounting groove is provided on the side wall of the first temperature-changing air duct 3. The first groove plate 41 is located in the first mounting groove and is disposed in the first temperature-changing air duct 3. The first sealing plate 42 is disposed on the side of the first groove plate 41 facing the first temperature-changing air duct 3 and is sealed to the inner wall of the first temperature-changing air duct 3. A first through hole is provided in the middle of the first sealing plate 42. The first drive motor is disposed in the first groove plate 41. The first rotating plate 43 is rotatably disposed on one side of the first groove plate 41. The first drive motor is connected to the first rotating plate 43 and is used to drive the first rotating plate 43 to rotate, so as to open or close the first through hole.

[0041] The first damper 4 adopts an embedded rotating structure, consisting of a first groove plate 41, a first sealing plate 42, a first drive motor, and a first rotating plate 43. The first groove plate 41 is embedded in the first mounting groove on the side wall of the first temperature-controlled air duct 3. The first sealing plate 42 fits against the inner wall of the air duct to achieve circumferential sealing. The first through hole in the middle of the sealing plate is the ventilation opening of the air duct. The first drive motor drives the first rotating plate 43 to rotate, and the opening and closing of the air duct and the air volume adjustment are achieved by blocking or exposing the first through hole.

[0042] The first groove plate 41 is the supporting base of the damper, used to install the drive motor and the rotating plate, and is also embedded in the mounting groove of the air duct for overall fixation. The first mounting groove is a groove on the side wall of the first variable temperature air duct 3 that matches the size of the groove plate, which facilitates the embedded installation and disassembly maintenance of the damper. The first sealing plate 42 is a plate used to seal the gap between the damper and the inner wall of the air duct. It can adopt a soft sealing edge structure to prevent air leakage at the edge of the damper. The first through hole is the ventilation hole of the air duct and is the core channel for cold air circulation. The size of the through hole determines the maximum ventilation volume. The first drive motor is the power component of the damper, which provides driving force for the rotation of the rotating plate and can precisely control the rotation angle. The first rotating plate 43 is a movable plate used to block the through hole. The ventilation area can be adjusted by rotating the angle to achieve stepless adjustment of the air volume.

[0043] Specifically, during assembly, the first drive motor is first installed in the internal cavity of the first slot plate 41, and the first rotating plate 43 is rotatably mounted on the front side of the first slot plate 41, so that the output shaft of the first drive motor is fixedly connected to the center of the first rotating plate 43 (the first drive motor can also be connected to the first rotating plate 43 through gear transmission). Then, the first sealing plate 42 is fixed to the front edge of the first slot plate 41 to form a complete damper assembly. Then, the entire damper assembly is horizontally inserted into the duct from the first mounting groove on the side wall of the first temperature-changing duct 3, so that the periphery of the first sealing plate 42 is tightly fitted and sealed to the inner wall of the first temperature-changing duct 3, and the first through hole is aligned with the air supply path of the first temperature-changing duct 3. When the first damper 4 needs to be opened, the first drive motor drives the first rotating plate 43 to rotate, so that the first rotating plate 43 is completely offset from the first through hole, and the cold air can pass through smoothly. When the first damper 4 needs to be closed, the first drive motor drives the first rotating plate 43 to rotate until it completely blocks the first through hole, blocking the flow of cold air.

[0044] Through the above technical solution, the rotary embedded first damper 4 has a compact structure, occupies little space in the first variable temperature air duct 3, and is easy to install, disassemble and maintain. The first sealing plate 42 fits tightly with the inner wall of the first variable temperature air duct 3, and the first rotating plate 43 can completely block the ventilation hole when closed, with excellent sealing performance, effectively avoiding the problem of air leakage after the first damper 4 is closed, and improving the temperature control accuracy of the first variable temperature space 2. At the same time, the modular damper assembly can be disassembled and installed separately, making maintenance and replacement convenient and reducing after-sales maintenance costs.

[0045] In this embodiment, as shown in the appendix Figure 1 and attached Figure 2 As shown, a dual-system refrigerator with dual variable temperature space also includes a freezer compartment 12 and a freezer air duct plate 15; the interior of the outer shell 1 adopts an upper and lower layout, with the refrigerator compartment 11 located at the upper part and the freezer compartment 12 located at the lower part. An integrated freezer air duct plate 15 is installed on the rear side of the freezer compartment 12. The main freezer air duct is integrally formed on the freezer air duct plate 15. A first air outlet is opened at the top of the freezer air duct plate 15. The first air outlet is directly connected to the air inlet of the second variable temperature air duct 6, so as to introduce the cold air of the freezer system upward into the second variable temperature space 5.

[0046] Among them, the freezer compartment 12 is the core sub-zero storage compartment of the refrigerator, and the temperature is usually maintained at around -18℃. It is used for long-term frozen storage of meat, seafood and other food. The freezer air duct plate 15 is a plate carrier that integrates the freezer air duct and installation components. It corresponds to the refrigerator air duct plate 13 and is made of plastic injection molding. It is the integrated base of the freezer air supply system. The first air outlet is an air supply interface specially opened at the top of the freezer air duct for the second variable temperature space 5. It is used to guide the cold air in the freezer air duct to the second variable temperature air duct 6 to realize the upward delivery of freezing cold energy.

[0047] Specifically, the unit adopts a classic top-and-bottom door layout with the refrigerator compartment on top and the freezer compartment on the bottom. The freezer air duct plate 15 is installed on the rear wall of the freezer compartment 12, and the freezer evaporator is fixed to the back of the freezer air duct plate 15. The generated cold air enters the freezer air duct. The front of the freezer air duct has three rows of six air outlets, which evenly deliver air to the main freezer compartment to ensure uniform temperature in the freezer compartment 12. The top right of the freezer air duct has a first air outlet, which connects upward to the air inlet of the second variable temperature air duct 6. When cooling is needed for the second variable temperature space 5, the cold air in the freezer air duct enters the second variable temperature air duct 6 through the top first air outlet and is then delivered upward to the second variable temperature space 5 inside the refrigerator compartment 11.

[0048] Through the above technical solution, the integrated refrigeration air duct plate 15 has a first air outlet directly connected to the second variable temperature air duct 6 at the top. The second variable temperature air duct 6 is directly connected, which shortens the cold air delivery path, reduces the loss of cold air during the delivery process, and improves the refrigeration efficiency. At the same time, the refrigeration air duct and the variable temperature interface are integrated on the same plate, which reduces the number of external air duct components, simplifies the assembly process, improves production efficiency, and reduces production costs.

[0049] In this embodiment, the second variable temperature air duct 6 is located within the foam layer between the refrigerator compartment 11 and the freezer compartment 12. The second variable temperature air duct 6, which connects the freezer air duct and the second variable temperature space 5, is entirely embedded inside the foam insulation layer of the cabinet between the refrigerator compartment 11 and the freezer compartment 12. The air duct is completely wrapped by the foam insulation material, so it does not occupy the internal storage space of either the refrigerator compartment 11 or the freezer compartment 12, while providing good insulation.

[0050] Among them, the foam layer is a polyurethane insulation foam layer filled inside the refrigerator body. It is the core insulation structure of the refrigerator and is used to isolate heat transfer between the inside and outside of the refrigerator and between different compartments to ensure stable compartment temperature. The built-in foam layer of the air duct means that the second variable temperature air duct 6 is completely embedded in the insulation foam material, without occupying internal storage space. At the same time, the insulation performance of the foam layer is used to reduce the loss of cold air in the air duct and prevent condensation on the outer wall of the air duct.

[0051] Through the above technical solution, the second variable temperature air duct 6 is built into the foam layer between the refrigerator compartment 11 and the freezer compartment 12, without occupying the internal storage space of the two compartments, thus improving the effective volume utilization rate of the refrigerator. At the same time, the excellent heat insulation performance of the foam layer can effectively reduce the loss of cold air during the air duct transportation process, improve the cooling efficiency, reduce energy consumption, and also avoid the condensation problem caused by the exposed air duct, thereby improving the reliability of the refrigerator operation and the user experience.

[0052] In this embodiment, as shown in the appendix Figure 2 As shown, the second variable temperature air duct 6 includes a left half shell 61 and a right half shell 62. The second variable temperature air duct 6 adopts a split and assembled structure, consisting of two parts: the left half shell 61 and the right half shell 62. The two half shells have semi-groove channels on opposite sides. After the two half shells are joined together, the channels on both sides are merged to form a complete closed air outlet channel, realizing the directional delivery of cold air from the refrigeration air duct to the second variable temperature space 5.

[0053] Among them, the left half shell 61 is the left half component of the air duct, and the right half shell 62 is the right half component of the air duct. Both are food-grade plastic injection molded parts. The split structure greatly simplifies the mold design and molding difficulty. The semi-groove channel refers to the semi-closed groove opened on each half shell. After the two half shells are spliced ​​together, they form a complete rectangular ventilation section, which constitutes a complete air outlet channel to ensure smooth flow of cold air.

[0054] Through the above technical solution, the split-type modular second temperature-changing air duct 6 has a simple structure. The two half-shells can be injection molded separately using simple molds, which greatly reduces the mold development cost and molding difficulty, and improves the production yield. At the same time, the modular structure is flexible in assembly, and the length of the air duct can be flexibly adjusted according to the cabinet of different heights, adapting to different models of refrigerators, making it more versatile and more efficient in production.

[0055] In this embodiment, as shown in the appendix Figure 4 As shown, the second damper 7 includes a second groove plate 71, a second sealing plate 72, a second drive motor, and a second rotating plate 73. The second damper 7 is integrated into the right half of the housing 62 of the second variable temperature air duct 6. It is composed of the second groove plate 71, the second sealing plate 72, the second drive motor, and the second rotating plate 73. The second sealing plate 72 is sealed to the inner wall of the air duct. The second through hole in the middle of the sealing plate is the ventilation opening of the air duct. The second drive motor drives the second rotating plate 73 to rotate, controlling the opening and closing of the second through hole, thereby realizing the opening and closing of the second variable temperature air duct 6 and the adjustment of the air volume.

[0056] The second groove plate 71 is the supporting base of the second damper 7, integrated into the internal mounting position of the right half shell 62, and closely fits with the right half shell 62; the second sealing plate 72 is used to seal the gap between the damper and the inner wall of the air duct to prevent cold air from leaking from the edge of the damper; the second through hole is the ventilation hole of the second variable temperature air duct 6, which is the core channel for cold air circulation; the second drive motor is the power component of the second damper 7, which provides driving force for the rotation of the rotating plate and can precisely control the rotation angle; the second rotating plate 73 is a movable plate used to block the through hole, and the ventilation area is adjusted by rotation to realize the air volume adjustment.

[0057] Through the above technical solution, the second damper 7 is integrated into the right half shell 62 of the second temperature-changing air duct 6, realizing the modular integration of the second temperature-changing air duct 6 and the second damper 7. During assembly, the installation of the second temperature-changing air duct 6 and the second damper 7 can be completed by directly splicing the two half shells, which greatly simplifies the assembly process and improves production efficiency. At the same time, the fitting precision between the second damper 7 and the right half shell 62 is higher, the sealing performance is better, the air leakage problem is effectively reduced, and the temperature control accuracy and operational stability of the second temperature-changing space 5 are improved.

[0058] In this embodiment, the side wall of the right half shell 62 is provided with a slot, and the side wall of the left half shell 61 is provided with a block. The block engages with the slot to connect the left half shell 61 and the right half shell 62.

[0059] Other embodiments of the invention will readily occur to those skilled in the art upon consideration of the specification and practice of the solutions disclosed herein. This invention is intended to cover any variations, uses, or adaptations of the invention that follow the general principles of the invention and include common knowledge or customary techniques in the art not disclosed herein. The specification and examples are to be considered exemplary only, and the true scope and spirit of the invention are indicated by the claims.

Claims

1. A dual-system refrigerator with dual variable temperature spaces, characterized in that, include: The outer shell has a refrigeration air duct and a freezing air duct inside; The first temperature-changing space is located inside the outer casing; The first variable temperature air duct is connected at one end to the refrigeration air duct and at the other end to the first variable temperature space. The first damper is installed inside the first variable temperature air duct and is used to open or close the first variable temperature air duct. The second temperature-changing space is disposed inside the outer shell and arranged side by side with the first temperature-changing space; The second variable temperature air duct is connected at one end to the refrigeration air duct and at the other end to the second variable temperature space. The second damper is installed inside the second variable temperature air duct and is used to open or close the second variable temperature air duct.

2. A dual-system refrigerator with dual variable temperature spaces according to claim 1, characterized in that, It also includes: The cold storage compartment is located inside the outer shell; The first temperature-changing space and the second temperature-changing space are slidably arranged side by side inside the refrigerator compartment.

3. A dual-system refrigerator with dual variable temperature spaces according to claim 2, characterized in that, Temperature sensors are installed in both the first and second temperature-changing spaces.

4. A dual-system refrigerator with dual variable temperature spaces according to claim 2, characterized in that, It also includes: A refrigerated air duct panel is installed on the rear side of the refrigerated compartment; A refrigerated evaporator is installed on the refrigerated air duct plate; Both the refrigerated air duct and the first variable temperature air duct are located on the refrigerated air duct plate.

5. A dual-system refrigerator with dual variable temperature spaces according to claim 4, characterized in that, The first damper includes: A first groove plate is disposed within the first variable temperature air duct; a first mounting groove is provided on the side wall of the first variable temperature air duct, and the first groove plate is located within the first mounting groove. A first sealing plate is disposed on one side of the first groove plate and is sealed to the inner wall of the first temperature-controlled air duct; a first through hole is provided in the middle of the first sealing plate. A first drive motor is disposed within the first slot plate; A first rotating plate is rotatably disposed on one side of the first groove plate; a first drive motor is connected to the first rotating plate and is used to drive the first rotating plate to rotate, so as to open or close the first through hole.

6. A dual-system refrigerator with dual variable temperature spaces according to claim 2, characterized in that, It also includes: A freezer compartment is disposed within the outer shell and located at the bottom of the refrigerator compartment; A refrigeration air duct plate is disposed on the rear side of the refrigeration chamber; the refrigeration air duct is disposed on the refrigeration air duct plate, and a first air outlet connected to the second variable temperature air duct is disposed on the top of the refrigeration air duct plate.

7. A dual-system refrigerator with dual variable temperature spaces according to claim 6, characterized in that, The second variable temperature air duct is located within the foam layer between the refrigerator compartment and the freezer compartment.

8. A dual-system refrigerator with dual variable temperature spaces according to claim 1, characterized in that, The second variable temperature air duct includes a left half shell and a right half shell. Each half shell has a channel on the opposite side. The two channels cooperate to form an air outlet channel, which is used to deliver the cold air from the refrigeration air duct to the second variable temperature space.

9. A dual-system refrigerator with dual variable temperature spaces according to claim 8, characterized in that, The second damper includes: The second groove plate is disposed inside the right half of the shell; The second sealing plate is disposed on one side of the second groove plate and is sealed to the inner wall of the second temperature-controlled air duct; a second through hole is provided in the middle of the second sealing plate; The second drive motor is disposed inside the second slot plate; The second rotating plate is rotatably disposed on one side of the second groove plate; the second drive motor is connected to the second rotating plate and is used to drive the second rotating plate to rotate, so as to open or close the second through hole.

10. A dual-system refrigerator with dual variable temperature spaces according to claim 8, characterized in that, The right half of the housing has a slot on its side wall, and the left half of the housing has a block on its side wall. The block engages with the slot to connect the left half of the housing to the right half of the housing.

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