A frost-free refrigerator with continuous refrigeration
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- QINGDAO ABLE WELL ELECTRICAL APPLIANCE
- Filing Date
- 2023-10-30
- Publication Date
- 2026-07-21
AI Technical Summary
Frost easily forms on the evaporator during the cooling cycle, affecting the cooling effect. Existing technologies are unable to effectively reduce frost formation on the evaporator without affecting the cooling effect.
The non-stop defrosting mechanism, which adopts a semiconductor cooling chip and grid plate structure, switches the current polarity between the condensation box and the standby box through the thermoelectric effect, thereby cooling the condensation box and heating the standby box, and defrosting periodically without affecting the cooling effect.
It achieves uninterrupted cooling in frost-free refrigerators, avoiding the problem of frost affecting the cooling effect and maintaining a stable temperature inside the refrigerator.
Smart Images
Figure CN117516002B_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of household appliances, and in particular to a frost-free refrigerator with uninterrupted cooling. Background Technology
[0002] A refrigerator is a refrigeration device that maintains a constant low temperature; it is also a consumer product that keeps food or other items at a constant low temperature. Inside the refrigerator is a compressor, an ice maker, a cabinet or box for freezing ice, and a storage box with a refrigeration unit. The capacity of a household refrigerator typically ranges from 20 to 500 liters.
[0003] A refrigerator is a device that uses the cooling effect of refrigerant compression, condensation, expansion and evaporation in the refrigeration circuit to maintain the interior of the refrigerator at a low temperature, thereby preserving food. The device is equipped with [missing information].
[0004] Frost-free refrigerators are also known as air-cooled refrigerators. Like direct-cooling refrigerators, they use evaporators to absorb heat, but unlike direct-cooling refrigerators, air-cooled refrigerators use a fan to circulate the cold air from the evaporator into the refrigerator.
[0005] Frost-free refrigerators remove moisture from food, and some of this moisture condenses into frost as it travels through the airflow to the evaporator. Furthermore, due to high summer temperatures and low temperatures inside the refrigerator, frequent opening of the refrigerator allows air to enter. Moisture in this air condenses as it travels through the airflow and reaches the evaporator, where it suddenly cools and condenses into frost. Therefore, even frost-free refrigerators can experience frost buildup on their evaporators. Designing a system to reduce moisture in the airflow circulation to minimize condenser frost is a pressing issue. Summary of the Invention
[0006] In order to provide uninterrupted cooling and reduce frost buildup inside the refrigerator during air-cooling circulation, this application provides a frost-free refrigerator with uninterrupted cooling.
[0007] The frost-free refrigerator with uninterrupted cooling provided in this application adopts the following technical solution: A frost-free refrigerator with uninterrupted cooling includes a cabinet with multiple interconnected storage cavities. A mezzanine is formed on the side of the cabinet away from the door, and a freezing evaporator pipe is fixedly connected to the bottom of the mezzanine. Each storage cavity has a venting channel perpendicular to the side wall of the door, connecting the storage cavity and the mezzanine. A circulation channel is formed on the side of the cabinet away from the door, with the mezzanine located between the circulation channel and the storage cavities. The top of the circulation channel communicates with the storage cavities, and the bottom of the circulation channel communicates with the mezzanine. A continuous defrosting system is installed within the circulation channel. The non-stop defrosting mechanism includes a defrosting box and a spare box disposed within the circulation channel. The defrosting box and the spare box have the same structure, with both ends of the defrosting box and the spare box being open. A semiconductor cooling chip is disposed between the defrosting box and the spare box. The n-type semiconductor of the semiconductor cooling chip is fixedly connected to the outer wall of the defrosting box, and the p-type semiconductor is fixedly connected to the outer wall of the spare box. A baffle plate one for controlling the opening or closing of the end of the defrosting box is disposed near the top of the defrosting box, and a baffle plate two for controlling the opening or closing of the end of the spare box is disposed near the top of the spare box.
[0008] By adopting the above technical solution, during user operation, air circulates in the storage cavity, circulation channel, and interlayer. By controlling baffle one to rotate to a vertical position and baffle two to rotate to a horizontal position, the condenser box opens to allow airflow, while the spare box closes. When the thermoelectric cooler is energized, current flows from the n-type semiconductor material to the p-type semiconductor material. Electrons in the n-type semiconductor material move to the p-type semiconductor material, while holes in the p-type semiconductor material move to the n-type semiconductor material. This movement of electrons and holes generates a potential difference at the thermocouple contact point. This potential difference causes heat to be transferred from the condenser box to the spare box, thus... The frost box achieves cooling by heating the spare box and cooling the frost box, causing water vapor in the air to adhere and frost inside the frost box. The thermoelectric cooler heats the spare box to defrost the frost inside. After a period of time, the positive and negative poles of the current are switched, controlling baffle two to rotate to a vertical position and controlling baffle one to rotate to a horizontal position, opening the spare box to allow airflow and closing the frost box. The thermoelectric cooler is then energized to heat and defrost the frost box, while the thermoelectric cooler cools the spare box, causing water vapor in the air to adhere and frost on the inner wall of the spare box. This sequential switching allows for periodic defrosting of the frost-free refrigerator without affecting its cooling performance.
[0009] Optionally, a vertically arranged partition plate is provided at the connection between the top of the frost box and the spare box inside the box. A rotating shaft one and a rotating shaft two are rotatably connected to the box near the partition plate. The rotating shaft one is located at the top of the frost box, and the rotating shaft two is located at the top of the spare box. A motor one is fixedly connected to the end of the rotating shaft one away from the rotating shaft two, and a baffle one is fixedly connected to the rotating shaft one. The motor one is used to drive the baffle one to rotate 90 degrees. A motor two is fixedly connected to the end of the rotating shaft two away from the rotating shaft one, and a baffle two is fixedly connected to the rotating shaft two.
[0010] By adopting the above technical solution, when the user uses the device, when motor one drives baffle one to rotate to a horizontal position, it blocks the end of the condensation box, allowing the airflow to pass completely through the spare box. When motor one drives baffle one to rotate 90 degrees to a vertical position, the airflow can enter the condensation box. When motor two drives baffle two to rotate to a horizontal position, it blocks the end of the spare box, allowing the airflow to pass completely through the condensation box. When motor two drives baffle two to rotate 90 degrees to a vertical position, the airflow can enter the spare box.
[0011] Optionally, the inner wall of the frost box is provided with multiple rows of grid plates, each row of grid plates is composed of multiple grid plates, and gaps are formed between adjacent grid plates to allow airflow to pass through. The grid plates are made of aluminum material.
[0012] By adopting the above technical solution, when the user uses the grating, the grating is made of aluminum material, which enables the grating to conduct heat and transfer cold. When refrigerating, the grating can increase the adhesion area of moisture in the air, making the frost formation more thorough. When defrosting, the aluminum grating can transfer heat, which facilitates the rapid melting of frost.
[0013] Optionally, attachment fins are provided between adjacent grid plates. The attachment fins are made of aluminum and have through holes.
[0014] By adopting the above technical solution, when the user uses the device, the through hole does not affect the airflow passing through the attached fins. The attached fins are made of aluminum material, and the auxiliary fins can increase the adhesion area of moisture in the air, making the frosting of moisture in the air more thorough.
[0015] Optionally, a heat dissipation vent is provided on the side of the box away from the door, and the heat dissipation vent is located at the top of the condensate box and the spare box; a drain outlet is provided at the bottom of the circulation channel of the box, and a drain pipe is fixedly connected to the drain outlet.
[0016] By adopting the above technical solution, when the user uses the device, the heat dissipation vent can discharge the steam generated when the condensation box and the spare box are heated, and the water collection tank is used to collect the water generated by the heating water.
[0017] Optionally, a through hole is provided on the inner wall of the box corresponding to the position of the air guide channel, the through hole connecting the air guide channel and the inner layer, and a heat dissipation vent is provided on the air guide channel.
[0018] By adopting the above technical solution, when the user uses the air guide hole, it connects the air guide channel and the inner layer. The air guide channel is provided with a heat dissipation port, so that the cold air in the inner layer enters the air guide channel through the air guide hole and finally enters the storage cavity through the heat dissipation port on the air guide channel.
[0019] Optionally, an air inlet is provided on the inner wall of the box at the location of the storage cavity and the circulation channel, and a fan is fixedly connected to the box at the location of the air inlet. An air outlet is provided at the bottom of the circulation channel and the connection between the interlayer, and a fan is provided at the location of the air outlet.
[0020] By adopting the above technical solution, when the user uses the device, the first fan generates negative pressure, which allows the air in the storage cavity to enter the circulation channel. The second fan generates negative pressure, which allows the cold air in the circulation channel to enter the interlayer, so that the cold air circulates repeatedly in the interlayer, the storage cavity and the circulation channel. Attached Figure Description
[0021] Figure 1 This is a structural schematic diagram of an embodiment of this application; Figure 2 This is a cross-sectional view of an embodiment of this application excluding the cabinet door; Figure 3 This is an exploded view of an embodiment of this application; Figure 4 yes Figure 3 Enlarged view of part A; Figure 5 This is a structural diagram designed to highlight the positional relationship between the frost box and the spare box.
[0022] Explanation of reference numerals in the attached drawings: 1. Cabinet; 11. Cabinet door; 12. Storage cavity; 13. Cavity; 14. Interlayer; 15. Freezing evaporator tube; 16. Air guide channel; 161. Air guide hole; 17. Through hole; 2. Circulation channel; 21. Air inlet; 22. Fan 1; 23. Air vent; 24. Fan 2; 3. Defrosting mechanism without stopping; 31. Frost box; 311. Grille plate; 312. Attached fins; 313. Through hole; 32. Spare box; 33. Semiconductor cooling chip; 34. Divider plate; 35. Shaft 1; 351. Motor 1; 352. Baffle 1; 36. Shaft 2; 361. Motor 2; 362. Baffle 2; 37. Heat dissipation vent; 38. Drain outlet; 381. Drain pipe; 39. Water collection tank. Detailed Implementation
[0023] The following is in conjunction with the appendix Figure 1-5 This application will be described in further detail.
[0024] This application discloses a frost-free refrigerator with uninterrupted cooling, referring to... Figure 1 and Figure 2 The system includes a cabinet 1, with a door 11 hinged to one side. Multiple storage chambers 12 are provided inside the cabinet 1, and these chambers are interconnected. The interconnected storage chambers 12 shown in the figure are preservation areas, and a freezer compartment is located at the bottom of each storage chamber 12. A cavity 13 is formed at the bottom of the cabinet 1 to accommodate electrical components such as a compressor. A mezzanine 14 is formed on the side of the cabinet 1 away from the door 11. A freezer evaporator pipe 15 is fixedly connected to the bottom of the mezzanine 14. The freezer evaporator pipe 15 is located on the inner wall of the mezzanine 14 near the freezer compartment, used to cool the freezer compartment and also to cool the air flowing within the mezzanine 14.
[0025] Each storage cavity 12 is provided with an air guide channel 16 perpendicular to the side wall of the door 11. A through hole 17 is provided on the inner wall of the box body 1 at the position corresponding to the air guide channel 16. The through hole 17 connects the air guide channel 16 and the inner layer 14. An air guide hole 161 is provided on the air guide channel 16 so that the cold air in the inner layer 14 enters the air guide channel 16 through the through hole 17, and finally enters the storage cavity 12 through the air guide hole 161 on the air guide channel 16.
[0026] A circulation channel 2 is provided on the side of the box body 1 away from the door. The circulation channel 2 is located on the inner wall of the box body 1. The interlayer 14 is located between the circulation channel 2 and the storage cavity 12. An air inlet 21 is provided on the inner wall of the box body 1 at the position of the storage cavity 12 and the circulation channel 2. A fan 1 22 is fixedly connected to the box body 1 at the position of the air inlet 21. An air outlet 23 is provided at the bottom of the circulation channel 2 and the connection of the interlayer 14. A fan 24 is provided on the box body 1 at the position of the air outlet 23. When the fan 1 22 works, it generates negative pressure, which allows the air in the storage cavity 12 to enter the circulation channel 2. When the fan 24 works, it generates negative pressure, which allows the cold air in the circulation channel 2 to enter the interlayer 14, so that the cold air circulates back and forth in the interlayer 14, the storage cavity 12 and the circulation channel 2.
[0027] Reference Figure 3 and Figure 4To reduce frost formation on the evaporator tube 15, a non-stop defrosting mechanism 3 is installed in the circulation channel 2. The non-stop defrosting mechanism 3 includes a condensation box 31 installed on the inner wall of the circulation channel 2. The side walls of the condensation box 31 are fixedly connected to the inner wall of the circulation channel 2. The two ends of the condensation box 31 are open, and the width of the condensation box 31 is half the width of the circulation channel 2. Multiple rows of grid plates 311 are installed on the inner wall of the condensation box 31. Each row of grid plates 311 consists of multiple grid plates 311 of the same size, horizontally distributed. The two sides of the grid plates 311 are fixedly connected to the inner wall of the condensation box 31, and gaps are formed between adjacent grid plates 311 to allow airflow. The grid plates 311 are made of aluminum. The grille plate 311 can conduct heat and transfer cold. Adhesive fins 312 are arranged between adjacent grille plates 311. The adhesive fins 312 are V-shaped, with their open ends facing upwards. Through holes 313 are provided on the adhesive fins 312 for airflow. The adhesive fins 312 are made of aluminum, and their two sides are fixedly connected to the inner wall of the condenser box 31. A spare box 32 with the same structure as the condenser box 31 is provided on the inner wall of the circulation channel 2 of the housing 1. The structure of the spare box 32 will not be described in detail here. The spare box 32 and the condenser box 31 are located at the same height within the circulation channel 2, ensuring that airflow within the circulation channel 2 can only pass through either the condenser box 31 or the spare box 32. A semiconductor cooling chip 33 is fixedly connected to the outer walls of both the condenser box 31 and the spare box 32. The semiconductor cooling chip 33 is composed of two different semiconductor materials: an n-type semiconductor and a p-type semiconductor. When these two semiconductor materials come into contact, they form a structure called a thermocouple. When current passes through this structure, a temperature difference is generated between the two semiconductor materials due to the thermoelectric effect. This temperature difference causes heat to be transferred from one semiconductor material to the other, thus achieving cooling on one side and heating on the other. In this thermoelectric cooling system 33, the n-type semiconductor is fixedly connected to the outer wall of the condenser box 31, and the p-type semiconductor is fixedly connected to the outer wall of the spare box 32. When energized, as current flows from the n-type semiconductor to the p-type semiconductor, electrons in the n-type semiconductor move towards the p-type semiconductor, while holes in the p-type semiconductor move towards the n-type semiconductor. This movement of electrons and holes creates a potential difference at the thermocouple contact point. This potential difference causes heat to transfer from the condenser box 31 to the spare box 32, thus cooling the condenser box 31 and heating the spare box 32. This causes the moisture in the cold air passing through the condenser box 31 to frost and adhere to the grid plate 311 and the attachment fins 312. Simultaneously, the already frosted spare box 32 is heated to melt the frost. By switching the positive and negative terminals of the current, the condenser box 31 and the spare box 32 alternately perform cooling and heating. Furthermore, the cooling effect can be controlled by changing the current, providing flexible control.
[0028] Reference Figure 5 Inside the housing 1, at the connection between the top of the condenser box 31 and the spare box 32, a partition plate 34 is installed. The partition plate 34 is vertically positioned and separates the downward airflow. Near the partition plate 34, the housing 1 is rotatably connected to a rotating shaft 35 and a rotating shaft 36. The rotating shaft 35 is located on top of the condenser box 31, and the rotating shaft 36 is located on top of the spare box 32. A motor 351 is fixedly connected to the end of the rotating shaft 35 furthest from the rotating shaft 36. A baffle 352 is fixedly connected to the rotating shaft 35. The motor 351 drives the baffle 352 to rotate 90 degrees. When the motor 351 drives the baffle 352 to rotate horizontally... In this configuration, the end of the condenser box 31 is blocked, allowing airflow to pass completely through the spare box 32. When motor 351 drives baffle 352 to rotate 90 degrees to a vertical position, airflow can enter the condenser box 31. Motor 361 is fixedly connected to the end of the rotating shaft 36 away from the rotating shaft 35, and baffle 362 is fixedly connected to the rotating shaft 36. When motor 361 drives baffle 362 to rotate to a horizontal position, the end of the spare box 32 is blocked, allowing airflow to pass completely through the condenser box 31 and into the spare box 32. When motor 361 drives baffle 362 to rotate 90 degrees to a vertical position, airflow can enter the spare box 32.
[0029] To ensure uninterrupted cooling and defrosting without affecting airflow, the frost box 31 and the spare box 32 can be controlled so that one is open and the other is closed. Simultaneously, the box through which airflow passes is cooled, both to lower the air temperature and to frost the moisture in the air into the box. The other box is heated to remove the frost. Once the box through which airflow passes is frosted and the other box has finished defrosting, a baffle is first controlled to close the airflow passage to the frosted box, then the defrosted box is opened. Simultaneously, the positive and negative terminals of the current are switched to cool and frost the other box, while the closed box is heated for defrosting. This process does not require stopping the refrigerator for defrosting and does not affect air cooling and circulation. For example, control motor 351 drives baffle 352 to rotate to a vertical position, and control motor 361 drives baffle 362 to rotate to a horizontal position, opening the condensation box 31 to allow airflow through and closing the spare box 32. The thermoelectric cooler 33 is energized to cool the condensation box 31, causing water vapor in the air to adhere to and frost on the attachment fins 312 and the grid plate 311. The thermoelectric cooler 33 heats the spare box 32 to defrost the frost condensed inside. After a period of time, the positive and negative terminals of the current are switched to control... Motor 2 361 drives baffle 2 362 to rotate to a vertical position, and controls motor 1 351 to drive baffle 1 352 to rotate to a horizontal position, so that the spare box 32 opens to allow airflow to pass through, closes the condensation box 31, and powers on the semiconductor cooling chip 33 to heat and defrost the condensation box 31. The semiconductor cooling chip 33 cools the attachment fins 312 and the grid plate 311 in the spare box 32, so that water vapor in the air adheres to the attachment fins 312 and the grid plate 311 and frosts. This sequential switching can defrost the air-cooled refrigerator periodically without affecting the refrigerator's cooling.
[0030] A heat dissipation vent 37 is provided on the side of the cabinet 1 away from the door 11. The heat dissipation vent 37 is located at the top of the defrost box 31 and the spare box 32, and is arranged along the width of the cabinet 1 to discharge the steam generated when heating the defrost box 31 and the spare box 32. A drain outlet 38 is provided at the bottom of the circulation channel 2 of the cabinet 1. A drain pipe 381 is fixedly connected to the drain outlet 38. A water collection tank 39 is placed in the cavity 13, and the drain pipe 381 extends into the water collection tank 39. The water collection tank 39 is used to collect the water generated by heating.
[0031] The implementation principle of a frost-free refrigerator with uninterrupted cooling in this application embodiment is as follows: Fan 1 22 and Fan 2 24 operate to circulate the storage cavity 12, circulation channel 2, and interlayer 14. Motor 1 351 drives baffle 1 352 to rotate to a vertical position, and motor 2 361 drives baffle 2 362 to rotate to a horizontal position, opening the frost box 31 to allow airflow through and closing the spare box 32. The semiconductor cooling chip 33 is energized to cool the frost box 31, causing water vapor in the air to adhere to and frost on the attachment fins 312 and grille 311. The semiconductor cooling chip 33 heats the spare box 32, thus cooling the spare box. The frost condensed inside the 32 is defrosted by heating; after a period of time, the positive and negative poles of the current are switched, the second motor 361 drives the second baffle 362 to rotate to the vertical state, and the first motor 351 drives the first baffle 352 to rotate to the horizontal state, so that the spare box 32 opens to allow airflow to pass through, the frost box 31 is closed, the semiconductor cooling chip 33 is energized, and the frost box 31 is heated to defrost. The semiconductor cooling chip 33 cools the attached fins 312 and the grid plate 311 inside the spare box 32, so that water vapor in the air adheres to the attached fins 312 and the grid plate 311 and frosts. The sequential switching can defrost the air-cooled refrigerator periodically without affecting the refrigerator's cooling.
[0032] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A frost-free refrigerator with uninterrupted cooling, characterized in that: The box includes a housing (1), which has multiple interconnected storage cavities (12). A mezzanine (14) is provided on the side of the housing (1) away from the door (11). A freeze evaporation tube (15) is fixedly connected to the bottom of the mezzanine (14). Each storage cavity (12) has a gas guide channel (16) on the side wall perpendicular to the door (11). The gas guide channel (16) is used to connect the storage cavity (12) and the mezzanine (14). A circulation channel (2) is provided on the side of the housing (1) away from the door (11). The mezzanine (14) is located between the circulation channel (2) and the storage cavity (12). The top of the circulation channel (2) is connected to the storage cavity (12), and the bottom of the circulation channel (2) is connected to the mezzanine (14). A non-stop defrosting mechanism (3) is provided in the circulation channel (2). The non-stop defrosting mechanism (3) includes a condensation box (31) and a spare box (32) disposed in the circulation channel (2). The condensation box (31) and the spare box (32) have the same structure. Both ends of the condensation box (31) and the spare box (32) are open. A semiconductor cooling chip (33) is disposed between the condensation box (31) and the spare box (32). The n-type semiconductor of the semiconductor cooling chip (33) is fixedly connected to the outer wall of the condensation box (31), and the p-type semiconductor is fixedly connected to the outer wall of the spare box (32). A baffle (352) is disposed near the top of the condensation box (31) to control the opening or closing of the end of the condensation box (31). A baffle (362) is disposed near the top of the spare box (32) to control the opening or closing of the end of the spare box (32).
2. The frost-free refrigerator with uninterrupted cooling according to claim 1, characterized in that: A vertically arranged partition plate (34) is provided at the connection between the top of the frost box (31) and the spare box (32) inside the box (1). A rotating shaft one (35) and a rotating shaft two (36) are rotatably connected to the box (1) near the partition plate (34). The rotating shaft one (35) is located at the top of the frost box (31), and the rotating shaft two (36) is located at the top of the spare box (32). A motor (351) is fixedly connected to one end of the rotating shaft 1 (35) away from the rotating shaft 2 (36), and a baffle 1 (352) is fixedly connected to the rotating shaft 1 (35). The motor 1 (351) is used to drive the baffle 1 (352) to rotate 90 degrees. The end of the rotating shaft two (36) away from the rotating shaft one (35) is fixedly connected to the motor two (361), and the baffle two (362) is fixedly connected to the rotating shaft two (36).
3. The frost-free refrigerator with uninterrupted cooling according to claim 1, characterized in that: The inner wall of the frost box (31) is provided with multiple rows of grid plates (311). Each row of grid plates (311) is composed of multiple grid plates (311). A gap is formed between adjacent grid plates (311) to allow airflow to pass through. The grid plates (311) are made of aluminum.
4. A frost-free refrigerator with uninterrupted cooling according to claim 3, characterized in that: An attachment fin (312) is provided between the adjacent grid plates (311). The attachment fin (312) is made of aluminum material and has through holes (313).
5. A frost-free refrigerator with uninterrupted cooling according to claim 1, characterized in that: A heat dissipation vent (37) is provided on the side of the box (1) away from the box door (11). The heat dissipation vent (37) is located at the top of the condensation box (31) and the spare box (32). The box (1) has a drain outlet (38) at the bottom of the circulation channel (2), and a drain pipe (381) is fixedly connected to the drain outlet (38).
6. A frost-free refrigerator with uninterrupted cooling according to claim 1, characterized in that: The inner wall of the box (1) is provided with a through hole (17) corresponding to the position of the air guide channel (16). The through hole (17) connects the air guide channel (16) and the inner layer (14). The air guide channel (16) is provided with an air guide hole (16).
7. A frost-free refrigerator with uninterrupted cooling according to claim 1, characterized in that: The inner wall of the box (1) is provided with an air inlet (21) at the location of the storage cavity (12) and the circulation channel (2). A fan (22) is fixedly connected to the box (1) at the location of the air inlet (21). An air passage (23) is provided at the bottom of the circulation channel (2) and the connection between the interlayer (14). A fan (24) is provided at the location of the air passage (23) in the box (1).