Double-temperature air-cooled refrigerator

Abstract

The technical scheme belongs to the technical field of refrigerators and specifically relates to a double-temperature air-cooled refrigerator, which comprises a cabinet and a door body, the cabinet is internally provided with a freezing chamber, a refrigerating chamber and an evaporating chamber, the evaporating chamber is internally provided with a refrigeration element, the refrigerating chamber is located at one end of the freezing chamber away from the evaporating chamber, the evaporating chamber is provided with a first air supply channel and a first return air channel which are in communication with the freezing chamber, the cabinet is further provided with a fan, and the fan is used for conveying cold air in the evaporating chamber to the freezing chamber along the first air supply channel; the door body is provided with a second air supply channel, the second air supply channel is in communication with the refrigerating chamber and the freezing chamber, and the refrigerating chamber is further provided with a second return air channel which is in communication with the evaporating chamber. The freezing chamber and the refrigerating chamber are separated by a partition plate, the second return air channel is arranged on the door body, and the air flow is guided by a guide groove, so that the air duct structure is simple, the air supply efficiency is high, the installation is more convenient, and the heat preservation performance at the middle beam is better.

Description

Technical Field

[0001] This technical solution relates to the field of freezer technology, specifically a dual-temperature air-cooled freezer. Background Technology

[0002] Air-cooled freezers are characterized by their frost-free nature. An example of an existing air-cooled freezer is Chinese Patent Publication No. CN116608629A, which discloses a high-efficiency dual-temperature air-cooled freezer, comprising a cabinet and a door. The cabinet contains a freezer compartment, a refrigerator compartment, and an evaporator compartment. The evaporator compartment contains a refrigeration element and a first fan. The evaporator compartment contains a first air supply channel and a first air return channel, both connecting the evaporator compartment and the freezer compartment. The intake end of the first fan is connected to the first air return channel. The refrigerator compartment contains a second air supply channel and a second air return channel. The second air supply channel is located between the freezer and refrigerator compartments. The refrigerator compartment contains a second fan. The second air supply channel connects the evaporator compartment and the refrigerator compartment, and the second air return channel connects the refrigerator compartment and the second air supply channel.

[0003] Existing dual-temperature air-cooled freezers achieve dual-temperature functionality by connecting a first air supply duct and a first return air duct between the evaporator and freezer compartments, and a second air supply duct and a second return air duct between the evaporator and refrigerator compartments. However, this design requires a second air supply duct located between the freezer and refrigerator compartments, necessitating the installation of a second fan near the refrigerator compartment. The overall installation structure is cumbersome and requires improvement. Summary of the Invention

[0004] This technical solution aims to improve the cumbersome installation of dual-temperature air-cooled freezers by providing a dual-temperature air-cooled freezer.

[0005] The purpose of this technical solution is achieved as follows: A dual-temperature air-cooled freezer includes a cabinet and a door. The cabinet contains a freezer compartment, a refrigerator compartment, and an evaporator compartment. The evaporator compartment contains a refrigeration element. The refrigerator compartment is located at the end of the freezer compartment away from the evaporator compartment. The evaporator compartment has a first air supply duct and a first air return duct communicating with the freezer compartment. The cabinet also has a fan for delivering cold air from the evaporator compartment to the freezer compartment along the first air supply duct. The door has a second air supply duct communicating with the refrigerator compartment and the freezer compartment. The refrigerator compartment also has a second air return duct communicating with the evaporator compartment.

[0006] Because the installation of the freezer requires the components to be installed upside down, and the existing design requires the second air supply duct to be located between the freezer and refrigerator compartments, the smaller the gap between the freezer and refrigerator compartments is usually, the better the space utilization of the freezer. This makes the installation of the second air supply duct troublesome in practice.

[0007] The technical solution of this application integrates a second air supply duct into the door, allowing the cold air from the evaporator chamber to first pass through the freezer compartment and then enter the refrigerator compartment, achieving a dual-temperature effect. Installing the second air supply duct within the door reduces the complexity of installing a specific structure in the confined space between the refrigerator and freezer compartments, making overall installation more convenient. Furthermore, while existing dual-temperature freezers typically employ a double-door structure, this application, based on the design of the second air supply duct, integrates the door into a single unit, resulting in better sealing of the upper openings of both the refrigerator and freezer compartments and improved insulation performance at the central beam.

[0008] Preferably, the air outlet of the first air supply channel extends upward at an angle toward the door and toward the refrigerator compartment; the end face of the door facing the freezer compartment is provided with a guide groove, which is used to guide the cold air discharged from the first air supply channel to the second air supply channel.

[0009] Through the above technical solution, the inclined setting of the air outlet, combined with the guiding effect of the guide channel, makes the airflow towards the refrigerator compartment smoother and the air delivery efficiency higher.

[0010] Preferably, the guide channel is provided with a diversion strip, which is fixed to the bottom of the guide channel to divert the cold air to the lower area.

[0011] By using the above technical solution, a diversion strip is set up to divert cold air to the lower area, so that the cold air channels in the freezer compartment are more fully covered and the temperature in the freezer compartment is more uniform.

[0012] Preferably, the box is equipped with a partition, with a refrigerator compartment and a freezer compartment on each side of the partition; The door includes a cover plate and an isolation seat disposed on the cover plate, the isolation seat being used to abut against the isolation plate to form a seal; the second air supply channel is disposed on the isolation seat.

[0013] The above technical solution divides the cabinet into a refrigerator compartment and a freezer compartment using an isolation panel, making the construction of these compartments easier. The second air supply duct is located on the isolation base, further facilitating its construction and overall installation.

[0014] Preferably, the lower end face of the isolation seat is provided with a groove for the isolation plate to be embedded in, and a sealing strip is installed at the bottom of the groove, the sealing strip being used to press against the isolation plate and the bottom of the groove.

[0015] The above technical solution strengthens the seal between the isolation seat and the isolation plate by using sealing strips to abut against each other, resulting in better insulation at the central beam.

[0016] Preferably, the isolation seat is slidably connected to an adjustment plate, which is used to adjust the size of the second air supply channel.

[0017] The above technical solution allows for adjustment of the size of the second air supply channel by sliding the adjustment plate, thereby controlling the temperature of the refrigerator compartment. Compared with the existing technology that uses heating elements for temperature control, the solution of this application makes the temperature regulation of the refrigerator compartment more energy-efficient and environmentally friendly.

[0018] Preferably, the isolation seat is provided with an adjustment groove that communicates with the second air supply channel, the adjustment plate is located in the adjustment groove and slides along the adjustment groove, the adjustment plate is provided with a lever, the lever extends to the outside of the isolation seat to drive the adjustment plate to slide.

[0019] Through the above technical solution, the adjustment groove guides the sliding of the adjustment plate, and the lever extends to the outside of the isolation seat to facilitate the sliding of the adjustment plate, making the adjustment operation of the adjustment plate more convenient.

[0020] Preferably, both the freezer compartment and the refrigerator compartment are provided with raised wire mesh at the bottom, and the connection between the first return air duct and the freezer compartment and the connection between the second return air duct and the refrigerator compartment are located below the corresponding raised wire mesh.

[0021] The above technical solution uses an elevated wire mesh frame to support the materials in the freezer and refrigerator compartments, reducing the likelihood of materials blocking the corresponding return air channels and making refrigeration more stable.

[0022] Preferably, the housing is provided with a reflux pipe, one end of which is connected to the refrigerator compartment and the other end of which is connected to the evaporation compartment, and the second return air channel is the channel inside the reflux pipe.

[0023] The above technical solution forms a second return air channel through a return pipe, making the formation of the return air channel more convenient.

[0024] Preferably, the cross-sectional area of ​​the first return air duct is greater than the cross-sectional area of ​​the second return air duct.

[0025] With the above technical solution, the large size of the first return air duct allows a large proportion of the cold air to be used to cool the freezer compartment during the internal air circulation, while a small portion of the cold air enters the refrigerator compartment to cool it, facilitating dual-temperature control.

[0026] The key and beneficial technical effects of this technical solution compared to existing technologies are: This technical solution uses an isolation plate to separate the freezer compartment and the refrigerator compartment. A second return air duct is installed in the door, and air is guided by a guide channel, which makes the air duct structure simple, the air supply efficiency high, the installation more convenient, and the insulation performance at the middle beam better. Attached Figure Description

[0027] Figure 1 This is a cross-sectional schematic diagram of the overall structure of the embodiment; Figure 2 for Figure 1 Enlarged diagram of section A in the middle; Figure 3 This is a schematic diagram of the door structure in an embodiment; Figure 4 This is a schematic diagram of the isolation seat structure in an embodiment; Figure 5 A partial structural cross-sectional view of an embodiment.

[0028] Reference numerals: 1. Cabinet; 11. Outer shell; 12. First inner liner; 13. Second inner liner; 2. Door; 21. Cover plate; 22. Isolation seat; 3. Isolation plate; 4. Freezer compartment; 5. Refrigerator compartment; 6. Evaporator compartment; 7. Elastic sealing ring; 8. Groove; 9. Sealing strip; 10. Refrigeration element; 14. First air supply duct; 15. First return air duct; 16. Fan; 17. Guide groove; 18. Second air supply duct; 19. Diverter bar; 20. Adjustment groove; 23. Adjustment plate; 24. Long groove; 25. Lever; 26. Return pipe; 27. Second return air duct; 28. Elevated grid frame. Detailed Implementation

[0029] The specific implementation of this technical solution will be further described in detail below with reference to the accompanying drawings.

[0030] Example: A dual-temperature air-cooled freezer, see [link / reference] Figure 1 and Figure 2The system includes a housing 1 and a door 2. The housing 1 includes an outer shell 11, a first inner liner 12, and a second inner liner 13. The outer shell 11 is fixed to the outside of the first inner liner 12 and the second inner liner 13. The first inner liner 12 is fixed with a partition plate 3, which divides the first inner liner 12 into a freezer compartment 4 and a refrigerator compartment 5. The freezer compartment 4 and the refrigerator compartment 5 are distributed one-to-one on both sides of the partition plate 3 along the horizontal direction. In actual production, the first inner liner 12 can be integrally formed, and then the partition plate 3 is embedded and fixed inside the first inner liner 12; alternatively, the first inner liner 12 can include a first half and a second half, with the partition plate 3 located between the first half and the second half, and both the first half and the second half fixedly installed on the partition plate 3. The second inner liner 13 has an evaporation chamber 6, wherein the first inner liner 12 and the second inner liner 13 are distributed along the horizontal direction, and the refrigerator compartment 5 is located at the end of the freezer compartment 4 away from the evaporation chamber 6. The second inner liner 13 can be an independent liner, or it can be assembled by directly adding a plate to the outer peripheral wall of the first liner, as shown in this example.

[0031] See Figure 1 and Figure 3 The door 2 covers the cabinet 1, sealing the freezer compartment 4 and the refrigerator compartment 5 to form a closed chamber. The door 2 includes a cover plate 21 and an isolation seat 22. The cover plate 21 is provided with an elastic sealing ring 7 at the upper opening of the first inner liner 12. When the cover plate 21 closes the cabinet 1, the elastic sealing ring 7 enhances the sealing effect of the upper opening of the first inner liner 12. The isolation seat 22 is fixedly installed on the cover plate 21. The position of the isolation seat 22 corresponds to the isolation plate 3. The lower end face of the isolation seat 22 is provided with a groove 8. A sealing strip 9 is installed at the bottom of the groove 8. When the door 2 closes the cabinet 1, the isolation plate 3 is embedded in the groove 8, and the sealing strip 9 is pressed against the bottom of the groove 8 to form a seal.

[0032] A refrigeration element 10, typically an evaporator, is installed inside the evaporator chamber 6. The evaporator operates to cool the gas inside the evaporator chamber 6, forming cold air. The evaporator chamber 6 has a first air supply duct 14 and a first air return duct 15 that communicate with the freezer chamber 4. One end of the first air supply duct 14 connects to the upper part of the evaporator chamber 6, and the other end connects to the area above the middle of the freezer chamber 4. The end of the first air supply duct 14 that connects to the freezer chamber 4 is an air outlet. A space is left between the air outlet and the door 2, and the air outlet faces the door 2 and extends upwards at an angle towards the refrigerator compartment 5. One end of the first air return duct 15 connects to the freezer chamber 4 near the bottom, and the other end connects to the evaporator chamber 6 near the bottom.

[0033] The cabinet 1 is also equipped with a fan 16, which is located inside the second inner liner 13 and near the air outlet of the first air supply channel 14. The fan 16 operates to exhaust the cold air in the evaporator 6 along the air outlet of the first air supply channel 14 into the freezer compartment 4. The isolation seat 22 is also provided with a second air supply channel 18, which connects the refrigerator compartment 5 and the freezer compartment 4. A guide groove 17 is provided on the end face of the cover plate 21 facing the freezer compartment 4. The length direction of the guide groove 17 extends along the distribution direction of the freezer compartment 4 and the refrigerator compartment 5. In this example, the length direction of the guide groove 17 is parallel to the length direction of the door 2. There are multiple guide grooves 17. In this example, there are four guide grooves 17, which are spaced apart along the width direction of the door 2. There are also multiple second air supply channels 18 along the width direction of the door 2. The number of second air supply channels 18 is the same as that of the guide grooves 17, and their positions correspond one-to-one to achieve interconnection. When the fan 16 discharges the cold air in the evaporation chamber 6 from the air outlet of the first air supply channel 14, the cold air flow tilts upward and rushes towards the guide groove 17 and is transported along the guide groove 17 to the second air supply channel 18.

[0034] When cold air enters the freezer compartment 4, based on the principle that hot air rises and cold air sinks, some of the cold air will sink. Since the first air supply duct 14 is located near the upper end of the freezer compartment 4, and the first return air duct 15 connects to the lower end of the freezer compartment 4, an internal circulation is formed, resulting in a wider cold air coverage area. However, the area above the connection between the first return air duct 15 and the freezer compartment 4 is primarily covered by sinking cold air, resulting in a relatively smaller supply of cold air. Therefore, a diverter strip 19 is fixed within the guide channel 17. The diverter strip 19 is fixed to the bottom of the guide channel 17, and a guide surface is formed on the side of the diverter strip 19 near the air outlet of the first air supply duct 14. This guide surface is either a guide slope or a guide arc. When the cold air flow needs to pass through the diverter strip 19 along the guide channel 17, some of the cold air flow is diverted to the area below the diverter strip 19 under the guidance of the guide surface, thus achieving cold air supply above the connection between the first return air duct 15 and the freezer compartment 4. In this example, the cross-section of the flow divider 19 is semi-circular to form a guide arc surface.

[0035] See Figure 4The isolation seat 22 is provided with an adjustment groove 20, which extends along the width direction of the door body 2. In this example, there are two adjustment grooves 20, and the two adjustment grooves 20 correspond one-to-one with the two second air supply channels 18, and the adjustment groove 20 is connected to the corresponding second air supply channel 18. Each adjustment groove 20 is provided with an adjustment plate 23, which slides along the length direction of the adjustment groove 20 and is connected to the isolation seat 22. The sliding of the adjustment plate 23 moves the position of the adjustment plate 23, thereby realizing the adjustment of the channel size of the second air supply channel 18. In order to facilitate the adjustment of the position of the adjustment plate 23, a long groove 24 communicating with the adjustment groove 20 is provided through the lower end of the adjustment seat. The long groove 24 extends along the sliding direction of the adjustment plate 23. A lever 25 is fixed on the adjustment plate 23. The lever 25 passes through the outside of the isolation seat 22 along the long groove 24. By moving the lever 25, the adjustment plate 23 is slidable to realize the adjustment of the size of the second air supply channel 18.

[0036] The cabinet 1 is also equipped with a return pipe 26, which is fixed to the lower outer wall of the first inner liner 12. One end of the return pipe 26 is connected to the refrigerator compartment 5 near the bottom, and the other end is connected to the evaporator compartment 6. The flow channel inside the return pipe 26 serves as a second return air channel 27, which, together with the second air supply channel 18 and the first air supply channel 14, forms an internal circulation of cold air. The cross-sectional area of ​​the second return air channel 27 is smaller than that of the first return air channel 15. Due to the larger channel size of the first return air channel 15, a large proportion of the cold air in the internal air circulation of the cabinet 1 is used to cool the freezer compartment 4, while a small portion of the cold air enters the refrigerator compartment 5 to cool it, thus achieving dual-temperature control.

[0037] See Figure 5 Elevated wire mesh frames 28 are provided at the bottom of both the freezer compartment 4 and the refrigerator compartment 5. The connection between the first return air duct 15 and the freezer compartment 4 and the connection between the second return air duct 27 and the refrigerator compartment 5 are both located below the corresponding elevated wire mesh frames 28. The elevated wire mesh frames 28 can support the materials in the freezer compartment 4 and the refrigerator compartment 5, reducing the possibility of materials blocking the corresponding return air ducts.

[0038] The specific work process of this plan is as follows: When the dual-temperature air-cooled freezer is operating, the refrigeration element 10 cools the gas in the evaporator chamber 6, forming cold air. The fan 16 then propels this cold air along the first air supply duct 14 into the freezer chamber 4. After entering the freezer chamber 4, most of the cold air flows within it under the influence of the distribution strip 19 and the first return air duct 15, eventually returning to the evaporator chamber 6 along the first return air duct 15. A portion of the cold air flows along the guide groove 17 through the second air supply duct 18 into the refrigerator chamber 5, and then returns to the evaporator chamber 6 through the second return air duct 27. The gas returning to the evaporator chamber 6 then flows through the refrigeration element 10 again, forming cold air, and this cycle continues. The size of the second air supply duct 18 can be adjusted by moving the adjustment plate 23, thereby controlling the amount of cold air entering the refrigerator chamber 5 and regulating the temperature of the refrigerator chamber 5.

[0039] The foregoing has shown and described the basic principles, main features, and advantages of this technical solution. Those skilled in the art should understand that this technical solution is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this technical solution. Various changes and modifications can be made to this technical solution without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed technical solution. The scope of protection of this technical solution is defined by the appended claims and their equivalents.

Claims

1. A dual-temperature air-cooled freezer, comprising a cabinet (1) and a door (2), wherein the cabinet (1) is provided with a freezer compartment (4), a refrigerator compartment (5) and an evaporation compartment (6), and the evaporation compartment (6) is provided with a refrigeration element (10), characterized in that: The refrigerator compartment (5) is located at the end of the freezer compartment (4) away from the evaporator compartment (6). The evaporator compartment (6) is provided with a first air supply duct (14) and a first return air duct (15) communicating with the freezer compartment (4). The cabinet (1) is also provided with a fan (16), which is used to transport the cold air in the evaporator compartment (6) to the freezer compartment (4) along the first air supply duct (14). The door (2) is provided with a second air supply duct (18), which connects the refrigerator compartment (5) and the freezer compartment (4). The refrigerator compartment (5) is also provided with a second return air duct (27) communicating with the evaporator compartment (6). The air outlet of the first air supply channel (14) extends upward towards the door (2) and towards the refrigerator compartment (5); the end face of the door (2) facing the freezer compartment (4) is provided with a guide groove (17), which is used to guide the cold air discharged from the first air supply channel (14) to the second air supply channel (18). The box (1) is equipped with a partition (3), and the two sides of the partition (3) are a refrigerator compartment (5) and a freezer compartment (4). The door (2) includes a cover plate (21) and an isolation seat (22) disposed on the cover plate (21), the isolation seat (22) being used to abut against the isolation plate (3) to form a seal; the second air supply channel (18) is disposed on the isolation seat (22); The position of the isolation seat (22) corresponds to that of the isolation plate (3).

2. The dual-temperature air-cooled freezer according to claim 1, characterized in that: The guide channel (17) is provided with a diversion strip (19), which is fixed to the bottom of the guide channel (17) to divert the cold air to the lower area.

3. A dual-temperature air-cooled freezer according to claim 1, characterized in that: The lower end face of the isolation seat (22) is provided with a groove (8) for the isolation plate (3) to be embedded. A sealing strip (9) is installed at the bottom of the groove (8). The sealing strip (9) is used to press against the isolation plate (3) and the bottom of the groove (8).

4. A dual-temperature air-cooled freezer according to claim 1, characterized in that: The isolation seat (22) is slidably connected to an adjustment plate (23), which is used to adjust the channel size of the second air supply channel (18).

5. A dual-temperature air-cooled freezer according to claim 4, characterized in that: The isolation seat (22) is provided with an adjustment groove (20) that communicates with the second air supply channel (18). The adjustment plate (23) is located in the adjustment groove (20) and slides along the adjustment groove (20). The adjustment plate (23) is provided with a lever (25). The lever (25) extends to the outside of the isolation seat (22) to drive the adjustment plate (23) to slide.

6. A dual-temperature air-cooled freezer according to claim 1, characterized in that: Both the freezer compartment (4) and the refrigerator compartment (5) are equipped with raised wire mesh frames (28) at their bottoms. The connection between the first return air duct (15) and the freezer compartment (4) and the connection between the second return air duct (27) and the refrigerator compartment (5) are located below the corresponding raised wire mesh frames (28).

7. A dual-temperature air-cooled freezer according to claim 6, characterized in that: The housing (1) is provided with a return pipe (26), one end of which is connected to the refrigerator compartment (5) and the other end is connected to the evaporation compartment (6). The second return air channel (27) is the channel inside the return pipe (26).

8. A dual-temperature air-cooled freezer according to claim 1, characterized in that: The cross-sectional area of ​​the first return air duct (15) is greater than the cross-sectional area of ​​the second return air duct (27).

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