Refrigerator and control method thereof

Abstract

The application provides a single-system refrigerator and a control method thereof. The single-system refrigerator comprises a cabinet provided with a refrigeration compartment, a freezing compartment and an evaporator chamber at least communicating with the freezing compartment; an evaporator arranged in the evaporator chamber and at least supplying cold air to the freezing compartment; a magnetic control fresh-keeping assembly arranged in the cabinet and forming a fresh-keeping compartment; and an air duct assembly comprising a freezing air supply air duct communicating with the evaporator chamber and the freezing compartment and a fresh-keeping air supply air duct communicating with the evaporator chamber and the fresh-keeping compartment. The fresh-keeping air supply air duct at least partially extends to the wall surface adjacent to the refrigeration compartment to exchange heat with the air in the refrigeration compartment and increase the temperature of the air in the fresh-keeping air supply air duct. The fresh-keeping air supply air duct is extended to be adjacent to the refrigeration compartment, so that the temperature in the fresh-keeping air supply air duct is increased by exchanging heat with the refrigeration compartment, and low-temperature air is prevented from entering the fresh-keeping compartment to cause frost in the fresh-keeping compartment.

Description

Technical Field

[0001] This application relates to the field of refrigeration equipment technology, and in particular to a refrigerator and its control method. Background Technology

[0002] Existing magnetically controlled crisper compartments are all used in multi-system refrigerators, placed in the refrigerator compartment. The cooling capacity is provided by the refrigerator evaporator, which has a smaller cooling capacity but a higher temperature (compared to the freezer evaporator). This results in high-temperature airflow to the magnetically controlled crisper compartment, reducing the risk of condensation and frost buildup. However, when the magnetically controlled crisper compartment is used in a single-system refrigerator, the freezer evaporator has a larger cooling capacity and a lower airflow temperature, making it prone to frost buildup and even food freezing, leading to a poor user experience. Summary of the Invention

[0003] The purpose of this application is to provide a refrigerator in which a fresh-keeping air supply duct for cooling the fresh-keeping compartment is adjacent to the refrigerator compartment, and can exchange heat with the higher-temperature air in the refrigerator compartment, thereby raising the temperature inside the fresh-keeping air supply duct and solving the problem of easy frost formation in the compartment caused by the low temperature of the refrigeration air supply in the prior art.

[0004] To achieve one of the above-mentioned objectives, one embodiment of this application provides a refrigerator, comprising:

[0005] The cabinet includes a refrigerator compartment, a freezer compartment, and an evaporator compartment that communicates with at least the freezer compartment; An evaporator is disposed in the evaporator chamber and supplies cooling to at least the freezer chamber; A magnetically controlled preservation component is installed inside the box and forms a preservation compartment; The air duct assembly includes a refrigeration air duct connecting the evaporator chamber and the freezer chamber, and a fresh-keeping air duct connecting the evaporator chamber and the fresh-keeping chamber; the fresh-keeping air duct extends at least partially to be adjacent to the wall of the refrigeration chamber, so as to raise the temperature of the air in the fresh-keeping air duct after exchanging heat with the air in the refrigeration chamber.

[0006] In one embodiment of this application, the evaporator chamber is located behind the freezer compartment, and the fresh-keeping air duct extends toward the refrigerator compartment and then bends to connect with the fresh-keeping compartment.

[0007] In one embodiment of this application, the length of the preservation air supply duct is ≥300mm.

[0008] In one embodiment of this application, the air duct assembly further includes a refrigerated air supply duct connecting the evaporator chamber and the refrigerated compartment, and an air duct component disposed on the rear side of the refrigerated compartment, wherein the refrigerated air supply duct and the fresh-keeping air supply duct are disposed within the air duct component.

[0009] In one embodiment of this application, the refrigerated air supply duct includes an ascending section and a bending section. The duct component includes a main component forming a refrigerated air supply duct and an ascending section, and a refrigerated air supply component forming a bending section. The refrigerated air supply component forms a bending section duct groove with its opening facing the main component. The main component forms a first receiving groove corresponding to the shape of the refrigerated air supply component. The refrigerated air supply component is disposed in the first receiving groove and cooperates with the main component to form the bending section of the refrigerated air supply duct.

[0010] In one embodiment of this application, the main component forms a rearward-facing refrigerated air duct slot and an ascending section air duct slot. The air duct component also includes a back plate, which covers the openings of the refrigerated air duct slot and the ascending section air duct slot to form the refrigerated air supply duct and the ascending section.

[0011] In one embodiment of this application, the magnetically controlled preservation component includes a barrel having the preservation chamber and an air guide disposed on the top of the barrel. The air guide is provided with an air guide channel, which is connected to the preservation air supply duct.

[0012] In one embodiment of this application, the magnetically controlled preservation assembly further includes a heat insulation component disposed between the air guide and the top of the barrel.

[0013] In one embodiment of this application, the thickness of the heat insulation element is ≥2mm.

[0014] In one embodiment of this application, the magnetically controlled preservation component further includes a magnetic field module, which is disposed above the heat insulation component and below the air guide component.

[0015] One embodiment of this application also provides a control method for a refrigerator, wherein the refrigerator is as described above, and the refrigerator further includes a fresh-keeping air damper disposed in a fresh-keeping air supply duct. The control method includes the following steps: Detect the temperature T inside the fresh food storage room and compare it with the preset maximum temperature T inside the fresh food storage room. 高 Temperature difference comparison; If the temperature T inside the fresh food storage room is different from the preset maximum temperature Tpreset inside the fresh food storage room... 高 If the temperature difference is greater than the preset threshold, the preservation air damper will be kept open; otherwise, the preservation air damper will be controlled to perform intermittent opening and closing cycles. Continuously monitor the temperature T inside the fresh food storage room. If the temperature T inside the fresh food storage room is less than or equal to the preset minimum temperature T, then... 低 Then, the preservation air damper will be closed.

[0016] In one embodiment of this application, the intermittent opening and closing cycle of the preservation damper specifically includes: The timer starts after the preservation air damper is opened, and the opening time t is recorded.开 Compared with the first preset time a, if the preservation air damper is open for time t 开 If the time is greater than or equal to the first preset time a, then the preservation air damper will be closed. The timer starts after the preservation air damper is closed, and the closing time t of the preservation air damper is recorded. 关 Compared with the second preset time b, if the preservation air damper closes for time t 关 If the time is greater than or equal to the second preset time b, then the preservation air damper will be opened.

[0017] In one embodiment of this application, the air duct assembly further includes a refrigerated air supply duct connecting the evaporator chamber and the refrigerator compartment. The refrigerator also includes a refrigerated air damper disposed within the refrigerated air supply duct. The fresh-keeping air damper and the refrigerated air damper are controlled to open or close by a dual-control switch. When the temperature T in the fresh-keeping compartment is less than or equal to the preset minimum temperature T in the fresh-keeping compartment... 低 After the preservation air damper is closed, it remains closed for a third preset time c.

[0018] In one embodiment of this application, the first preset time a + the second preset time b ≥ 15 min, and the third preset time c ≥ 5 min.

[0019] One or more technical solutions provided in this application have at least the following technical effects or advantages: The refrigerator provided in this application has a refrigeration air duct that supplies cooling to the fresh food compartment adjacent to the refrigerator compartment. The cold air in the refrigeration air duct can exchange heat with the higher temperature air in the refrigerator compartment, which raises the temperature of the cold air in the refrigeration air duct and prevents low-temperature gas from entering the fresh food compartment, thus preventing frost from forming in the fresh food compartment. Attached Figure Description

[0020] Figure 1 This is a schematic diagram showing the cooperation between the air duct assembly and the magnetic preservation assembly in the embodiments of this application.

[0021] Figure 2 yes Figure 1 A schematic diagram of the structure of the central duct component after the explosion.

[0022] Figure 3 yes Figure 3 Another angle of the main component and the fresh-keeping air supply component.

[0023] Figure 4 yes Figure 1 Schematic diagram of cross section along line AA.

[0024] Figure 5 yes Figure 4 Enlarged view of section B in the middle.

[0025] 2. Magnetic control preservation component; 20. Preservation compartment; 21. Barrel body; 211. Second receiving slot; 22. Air guide component; 220. Air guide channel; 221. Air guide column; 23. Heat insulation component; 241. Upper magnetic field module; 242. Lower magnetic field module; 4. Air duct component; 41. Refrigerated air supply duct; 43. Preservation air supply duct; 431. Ascending section; 432. Bending section; 441. Main component; 4411. First receiving slot; 4412. Refrigerated air duct slot; 4413. Ascending section air duct slot; 4414. Refrigerated air outlet; 442. Preservation air supply component; 4421. Bending section air duct slot; 443. Back panel. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] The terms used in this document, such as “center,” “upper,” “lower,” “front,” “rear,” “left,” “right,” “vertical,” “horizontal,” “top,” “bottom,” “inner,” and “outer,” indicating spatial relative positions, are used for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative positions” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0028] For example, if the device in the figure is flipped, a unit described as being "below" or "under" other units or features will be "above" other units or features. Therefore, the exemplary term "below" can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise), and the spatially related descriptive terms used herein will be interpreted accordingly.

[0029] In the description of this application, it should be noted that, unless otherwise expressly 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 between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0030] Furthermore, it should be understood that although the terms "first," "second," etc., may be used herein to describe various elements or structures, the objects being described should not be limited by these terms. These terms are only used to distinguish these objects from one another. For example, a first receiving groove may be referred to as a second receiving groove, and similarly, a second receiving groove may be referred to as a first receiving groove, without departing from the scope of protection of this application.

[0031] This application provides a refrigerator, such as... Figures 1-5 As shown, the device includes a cabinet and an evaporator, a magnetically controlled preservation component 2, and an air duct assembly 4 disposed within the cabinet. The cabinet has a refrigerator compartment, a freezer compartment, and an evaporator compartment that connects to at least the freezer compartment; the evaporator is disposed within the evaporator compartment and supplies cooling to at least the freezer compartment; the magnetically controlled preservation component 2 forms a preservation compartment 20; the air duct assembly 4 includes a freezing air duct connecting the evaporator compartment and the freezer compartment, and a preservation air duct 43 connecting the evaporator compartment and the preservation compartment 20; the preservation air duct 43 extends at least partially to be adjacent to the wall of the refrigerator compartment, so as to raise the temperature of the air in the preservation air duct 43 after heat exchange with the air in the refrigerator compartment.

[0032] Since the evaporator needs to provide cooling to the freezer compartment, the evaporator temperature is low because the freezer compartment temperature is low. However, the food stored in the fresh food compartment 20 that requires preservation is mostly fruits, vegetables, and seafood with high water content, resulting in high humidity within the fresh food compartment 20. The low-temperature air from the evaporator compartment enters the fresh food compartment 20 directly through the fresh food air supply duct 43, and upon contact with the high-temperature, high-humidity air inside the fresh food compartment 20, it easily condenses into water or forms frost.

[0033] Therefore, this application designates at least part of the air supply duct 43 for supplying air to the fresh-keeping compartment 20 as adjacent to the cold storage compartment. When the air flows through the cold storage compartment, the low-temperature cold air in the air supply duct can exchange heat with the high-temperature air in the cold storage compartment, thereby increasing the temperature of the cold air in the air supply duct 43, reducing the temperature difference between the air in the air supply duct 43 and the fresh-keeping compartment 20, preventing the condensation of high-humidity air, and also providing localized cooling for the cold storage compartment.

[0034] The preservation air supply duct 43 extends to at least part of the cold storage compartment, making the preservation air supply duct 43 longer and also able to raise the temperature of the cold air in the preservation air supply duct 43 by extending the air supply path.

[0035] In some embodiments of this application, the magnetically controlled freshness preservation component 2 is disposed in the refrigerator compartment. The aforementioned refrigerator compartment adjacent to the freshness-preserving air duct 43 specifically refers to the space within the refrigerator compartment that is not occupied by the magnetically controlled freshness preservation component 2. In this embodiment of the application, the magnetically controlled freshness preservation compartment 20 is disposed in the refrigerator compartment as an example. Therefore, the refrigerator compartment mentioned in the preceding and following text refers to the space within the refrigerator compartment that is not occupied by the magnetically controlled freshness preservation component 2.

[0036] Of course, the magnetically controlled fresh-keeping compartment 20 can also be located in the space outside the refrigerator compartment and the freezer compartment in the cabinet, for example, between the refrigerator compartment and the freezer compartment. That is, the magnetically controlled fresh-keeping component 2 is not located in the refrigerator compartment, and in this case, the refrigerator compartment is the entire space of the refrigerator compartment.

[0037] In some embodiments of this application, the evaporator chamber is located behind the freezer chamber, and the fresh-keeping air duct 43 extends toward the refrigerator chamber and then bends to connect with the fresh-keeping chamber 20.

[0038] In this embodiment, the evaporator chamber is also connected to the refrigerator compartment, and the evaporator cools the refrigerator compartment, thus making this a single-system refrigerator. In a single-system refrigerator, the evaporator chamber is usually located behind the freezer compartment. To be adjacent to the refrigerator compartment, the fresh-keeping air duct 43 must extend from the evaporator chamber towards the refrigerator compartment until it is partially adjacent, then bend and extend in the opposite direction towards the fresh-keeping compartment 20, thus connecting with it. This ensures that the bend point of the fresh-keeping air duct 43 must be within the height range of the refrigerator compartment.

[0039] In some embodiments of this application, the length of the preservation air supply duct 43 is ≥300mm. This length is the extension length of the preservation air supply duct 43, that is, the length that the cold air in the preservation air supply duct 43 needs to flow through. By controlling the extension length of the preservation air supply duct 43 to be relatively long, the temperature of the cold air in the preservation air supply duct 43 is increased by extending the air supply path.

[0040] In some embodiments of this application, the air duct assembly 4 further includes a refrigerated air supply duct 41 connecting the evaporator chamber and the cold storage chamber, and an air duct component disposed at the rear of the cold storage chamber. The refrigerated air supply duct 41 and the fresh-keeping air supply duct 43 are disposed within the air duct component. The refrigerated air supply duct 41 and the fresh-keeping air supply duct 43 are disposed in the same air duct component, which makes the production and installation process more convenient.

[0041] Specifically, the refrigerator compartment is located above the freezer compartment, such as... Figure 2 The diagram shows the combination of the magnetic preservation component 2 and the air duct component 4 after the refrigerator liner of the single-system refrigerator is removed. It can be seen from the diagram that the magnetic preservation component 2 is set at the bottom of the refrigerator compartment. Therefore, the bottom of the preservation air duct 43 needs to be connected to the evaporator chamber at the back of the freezer compartment, and the top needs to be within the height range of the refrigerator compartment. Thus, the preservation air duct 43 includes an ascending section 431 and a bending section 432.

[0042] The bottom end of the rising section 431 connects to the evaporator chamber and extends upwards; one end of the bent section 432 connects to the top end of the rising section 431 and continues upwards to the height range of the cold storage compartment, then bends downwards and extends, with the other end connecting to the fresh-keeping compartment 20. Most of the bent section 432 (except for the parts that connect to the rising section 431 and the fresh-keeping compartment 20 at both ends respectively) is adjacent to the cold storage compartment. Its purpose is to increase the length of the air duct to raise the temperature of the cold air. Therefore, the upward and downward extension of the bent section 432 is not limited to vertical extension, inclined extension, or curved extension. The extension direction can be designed according to the required length of the fresh-keeping air supply duct 43.

[0043] In some embodiments of this application, the air duct component includes a main component 441 having a refrigerated air supply duct 41 and an ascending section 431, and a fresh-keeping air supply component 442 having a bent section 432. The fresh-keeping air supply component 442 forms a bent section air duct groove 4421 with an opening facing the main component 441. The main component 441 forms a first receiving groove 4411 corresponding to the shape of the fresh-keeping air supply component 442. The fresh-keeping air supply component 442 is disposed in the first receiving groove 4411 and cooperates with the main component 441 to form the bent section 432 of the fresh-keeping air supply duct 43.

[0044] Due to the unique shape of the bent section 432 of the preservation air supply duct 43, directly machining the preservation air supply duct 43 onto the duct component according to the required shape is a complex process. However, by dividing the duct component into a main component 441 and a preservation air supply component 442, and machining a corresponding bent section duct groove 4421 on the preservation air supply component 442 according to the shape of the bent section 432 of the preservation air supply duct 43, and by opening a first receiving groove 4411 on the main component 441 according to the shape of the preservation air supply component 442, the preservation air supply component 442 can be placed within the first receiving groove 4411, thus forming a single unit between the main component 441 and the preservation air supply component 442. Simultaneously, the bottom surface of the first receiving groove 4411 covers the opening of the bent section duct groove 4421, forming the bent section 432 of the preservation air supply duct 43.

[0045] This method facilitates production, eliminating the need for complex bending sections 432 of the preservation air supply duct 43 on the main component 441.

[0046] In some embodiments of this application, the main component 441 forms a rearward-facing refrigerated air duct 4412 and an ascending section air duct 4413. The air duct component also includes a back plate 443, which covers the openings of the refrigerated air duct 4412 and the ascending section air duct 4413, forming a refrigerated air supply duct 41 and an ascending section 431.

[0047] Since the air duct is a structure that is closed on all four sides and open at both ends, it is difficult to directly install it on the main component 441. Therefore, a refrigeration distribution duct with an opening on one side and an ascending section air duct 4413 are opened on the main component 441, and the openings of the refrigeration air duct 4412 and the ascending section air duct 4413 are covered by a back plate 443, forming the ascending section 431 of the closed refrigeration air supply duct 41 and the fresh-keeping air supply duct 43. After the openings of the ascending section air duct 4413 and the bend section air duct 4421 are covered, they are connected to form the aforementioned fresh-keeping air supply duct 43.

[0048] In some embodiments of this application, the main component 441 is also provided with a refrigeration air outlet 4414, which connects the refrigeration compartment and the refrigeration air supply duct 41, so that the cold air in the refrigeration air supply duct 41 can enter the refrigeration compartment to cool the refrigeration compartment.

[0049] In some embodiments of this application, the magnetically controlled preservation component 2 includes a barrel 21 having a preservation chamber 20 and an air guide 22 disposed on the top of the barrel 21. The air guide 22 is provided with an air guide channel 220, which is connected to the preservation air supply duct 43.

[0050] The magnetically controlled preservation component 2 is connected to the preservation air supply duct 43 through an air guide 22. The air guide 22 is located at the top of the barrel 21, which can prevent cold air from being blown directly into the barrel 21 and directly contacting the food in the preservation compartment 20, thus preventing the food from freezing.

[0051] Specifically, the air guide 220 of the air guide component 22 has an opening facing downwards, and the opening is covered by the structure at the top of the barrel 21 to form the air guide 220. The air guide component 22 is also provided with several air guide columns 221 located in the air guide 220. The air guide columns 221 are teardrop-shaped with the tip facing backwards and the arc end facing forwards, thereby guiding the cold air entering the air guide 220 from the rear end of the air guide component 22 forwards.

[0052] The air guide channel 220 increases in width from back to front in the left and right directions. The rear end of the air guide channel 220 is connected to the preservation air supply channel 43. Its air inlet occupies only a small part of the width of the barrel 21. When the cold air flows forward in the ventilation channel, the flow path gradually widens. Therefore, the width of the ventilation channel also gradually increases.

[0053] The ventilation channel forms a stepped section along its edge, and the magnetically controlled preservation component 2 also includes a sealing strip disposed on the stepped section. When the air guide 22 is installed on the top of the barrel 21, the stepped section and the top structure of the barrel 21 compress the sealing strip to ensure the airtightness of the ventilation channel.

[0054] In some embodiments of this application, the magnetically controlled preservation assembly 2 further includes a heat insulation member 23 disposed between the air guide member 22 and the top of the barrel 21.

[0055] Since the cold air comes from the evaporator chamber, after the extension of the fresh air supply duct 43 and the heat exchange with the cold storage compartment, the cold air in the fresh air supply duct 43 can be heated. However, the cold air flows in the fresh air supply duct 43, and the heat exchange efficiency with the cold storage compartment is limited, so the temperature rise of the cold air is also limited. After the cold air enters the air guide 22, the cold energy can radiate through the top of the barrel 21 into the fresh storage compartment 20, and come into contact with the high temperature and high humidity air in the fresh storage compartment 20, causing the high temperature and high humidity air to condense and produce condensation on the inner side of the top of the barrel 21.

[0056] A heat insulation component 23 is installed between the air guide channel 220 of the air guide component 22 and the top of the barrel 21 to prevent the cold radiation in the air guide channel 220 from entering the fresh food compartment 20, thereby preventing condensation from forming on the inner side of the top of the barrel 21. At the same time, it can further increase the circulation path of cold air and further increase the temperature.

[0057] In some embodiments of this application, the thickness of the heat insulation component 23 is ≥2mm, which avoids the heat insulation component 23 occupying too much space while achieving the effect of isolating the cold air in the air guide channel 220 from radiating to the fresh food compartment 20. The heat insulation component 23 is made of heat-insulating PE, and its size matches that of the air guide component 22. Ideally, the heat insulation component 23 and the air guide component 22 are exactly aligned, so that the air guide channel 220 on the heat insulation component 23 can be completely covered and blocked by the heat insulation component 23.

[0058] In some embodiments of this application, the top of the barrel 21 is provided with a second receiving groove 211 corresponding to the shape of the heat insulation member 23, and the heat insulation member 23 is disposed in the second receiving groove 211.

[0059] The second receiving groove 211 is recessed from the top wall of the barrel 21 toward the fresh-keeping compartment 20. The heat insulation member 23 is disposed in the second receiving groove 211, and the thickness of the heat insulation member 23 is the same as the depth of the second receiving groove 211. That is, the top of the heat insulation member 23 is flush with the edge of the opening of the second receiving groove 211, so that it does not occupy too much space in the fresh-keeping compartment 20, nor does it cause the heat insulation member 23 to bulge upward and occupy the external space of the barrel 21.

[0060] Of course, in addition to setting a heat insulation component 23 between the top of the air guide 22 and the barrel 21, a heating wire can also be set. When the fresh food compartment 20 needs to be cooled, the heating wire can be turned on to increase the air supply temperature and achieve the same effect.

[0061] In some embodiments of this application, the magnetically controlled preservation component 2 further includes a magnetic field module, which is disposed above the heat insulation component 23 and below the air guide component 22.

[0062] The magnetic field module specifically includes an upper magnetic field module 241 and a lower magnetic field module 242. The upper magnetic field module 241 is located at the top of the barrel 21, and the lower magnetic field module 242 is located at the bottom of the barrel 21. Since the heat insulation component 23 is located inside the second receiving groove 211 and is flush with the edge of the second receiving groove 211, the upper magnetic field module 241 located at the top of the barrel 21 can be placed above the heat insulation component 23, and the upper magnetic field module 241 can be used to shield the downward-facing ventilation channel of the air guide component 22.

[0063] Of course, the upper magnetic field module 241 can also be set above the air guide 22.

[0064] An embodiment of this application also provides a control method for a single-system refrigerator. The single-system refrigerator is the aforementioned single-system refrigerator, which further includes a fresh-keeping damper disposed within the fresh-keeping air supply duct 43. The control method includes the following steps: The temperature T inside the fresh food storage compartment 20 is detected and compared with the preset maximum temperature T inside the fresh food storage compartment 20. 高 Temperature difference comparison; If the temperature T inside the fresh food storage room 20 is the same as the preset maximum temperature T inside the fresh food storage room 20... 高 If the temperature difference is greater than the preset threshold, the preservation air damper will be kept open; otherwise, the preservation air damper will be controlled to perform intermittent opening and closing cycles. Continuously monitor the temperature T inside the fresh food storage compartment 20. If the temperature T inside the fresh food storage compartment 20 is less than or equal to the preset minimum temperature T inside the fresh food storage compartment 20... 低 Then, the preservation air damper will be closed.

[0065] When controlling the temperature of the fresh food storage compartment 20, the control scheme within the fresh food storage compartment 20 is divided into two stages. This occurs when the temperature T inside the fresh food storage compartment 20 is close to the preset maximum temperature Tpreset inside the fresh food storage compartment 20. 高 When the difference between the values ​​is greater than the preset threshold, it usually occurs after the fresh food compartment 20 is opened or after the refrigerator loses power, causing the temperature of the fresh food compartment 20 to rise and requiring timely cooling. At this time, the fresh food vent is kept open to allow a large amount of cold air to enter the fresh food compartment 20 quickly and cool it down rapidly.

[0066] The temperature T inside the fresh food storage compartment 20 is the same as the preset maximum temperature T inside the fresh food storage compartment 20. 高 When the difference between the values ​​is less than or equal to the preset threshold, it is the normal cooling stage of the fresh food compartment 20. At this time, the fresh food air damper is opened and closed intermittently to more accurately control the temperature T in the fresh food compartment 20, making the temperature T in the fresh food compartment 20 more stable and with a smaller fluctuation range, such as fluctuating within the range of 0.2-0.3℃.

[0067] Specifically, the intermittent opening and closing cycle of the preservation air damper includes: The timer starts after the preservation air damper is opened, and the opening time t is recorded. 开 Compared with the first preset time a, if the preservation air damper is open for time t 开 If the time is greater than or equal to the first preset time a, then the preservation air damper will be closed. The timer starts after the preservation air damper is closed, and the closing time t of the preservation air damper is recorded. 关 Compared with the second preset time b, if the preservation air damper closes for time t 关 If the time is greater than or equal to the second preset time b, then the preservation air damper will be opened.

[0068] During the first preset time 'a' when the preservation air damper is open, cold air enters the preservation compartment 20, causing the temperature inside the preservation compartment 20 to decrease. After the preservation air damper closes after the first preset time 'a', during the second preset time 'b' when the preservation air damper is closed, the cold air diffuses within the preservation compartment 20, causing the temperature inside the preservation compartment 20 to gradually become more uniform. Through multiple cycles of opening and closing of the preservation air damper, while the temperature inside the preservation compartment 20 decreases, the temperature distribution within the preservation compartment 20 becomes more uniform.

[0069] In some embodiments of this application, the single-system refrigerator further includes a refrigerator damper disposed within the refrigerator air duct 41, wherein the fresh-keeping damper and the refrigerator damper are controlled to open or close by a dual-control switch; when the temperature T in the fresh-keeping compartment 20 is less than or equal to the preset minimum temperature T in the fresh-keeping compartment 20. 低 After the preservation air damper is closed, it remains closed for a third preset time c.

[0070] The refrigeration and fresh-keeping air dampers are controlled by a dual-control switch, making it a one-to-two damper configuration. The frequent opening and closing of the fresh-keeping air damper during its intermittent opening and closing cycle can affect the switch. Therefore, the temperature T inside the fresh-keeping compartment 20 must be less than or equal to the preset minimum temperature T inside the fresh-keeping compartment 20. 低 Then keep it closed for a certain period of time.

[0071] In some embodiments of this application, the first preset time a + the second preset time b ≥ 15 min, and the third preset time c ≥ 5 min.

[0072] The first preset time a + the second preset time b ≥ 15 min, meaning the cycle of the preservation air damper opening and closing is greater than 15 min, ensuring uniform temperature within the preservation chamber 20 while avoiding excessively frequent opening and closing of the preservation air damper. The third preset time c is approximately equal to the second preset time b.

[0073] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0074] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A refrigerator, characterized in that, include: The cabinet includes a refrigerator compartment, a freezer compartment, and an evaporator compartment that communicates with at least the freezer compartment; An evaporator is disposed in the evaporator chamber and supplies cooling to at least the freezer chamber; A magnetically controlled fresh-keeping component (2) is disposed inside the box and forms a fresh-keeping compartment (20); The air duct assembly (4) includes a refrigeration air duct connecting the evaporator chamber and the freezer chamber and a fresh air duct (43) connecting the evaporator chamber and the fresh air duct (20); the fresh air duct (43) extends at least partially to be adjacent to the wall of the refrigeration chamber so as to raise the temperature of the air in the fresh air duct (43) after exchanging heat with the air in the refrigeration chamber.

2. The refrigerator according to claim 1, characterized in that, The evaporator chamber is located at the rear of the freezer chamber, and the fresh-keeping air duct (43) extends toward the refrigerator chamber and then bends to connect with the fresh-keeping chamber (20).

3. The refrigerator according to claim 2, characterized in that, The length of the fresh-keeping air supply duct (43) is ≥300mm.

4. The refrigerator according to claim 1, characterized in that, The air duct assembly (4) also includes a refrigerated air supply duct (41) connecting the evaporator chamber and the cold storage chamber, and an air duct component disposed on the rear side of the cold storage chamber, wherein the refrigerated air supply duct (41) and the fresh-keeping air supply duct (43) are disposed within the air duct component.

5. The refrigerator according to claim 4, characterized in that, The fresh-keeping air supply duct (43) includes an ascending section (431) and a bending section (432). The duct component includes a main component (441) forming the refrigerated air supply duct (41) and the ascending section (431), and a fresh-keeping air supply component (442) forming the bending section (432). The fresh-keeping air supply component (442) forms a bending section duct groove (4421) with its opening facing the main component (441). The main component (441) forms a first receiving groove (4411) corresponding to the shape of the fresh-keeping air supply component (442). The fresh-keeping air supply component (442) is disposed in the first receiving groove (4411) and cooperates with the main component (441) to form the bending section (432) of the fresh-keeping air supply duct (43).

6. The refrigerator according to claim 5, characterized in that, The main component (441) forms a rearward-facing refrigerated air duct slot (4412) and an ascending section air duct slot (4413). The air duct component also includes a back plate (443), which covers the openings of the refrigerated air duct slot (4412) and the ascending section air duct slot (4413) to form the refrigerated air supply duct (41) and the ascending section (431).

7. The refrigerator according to claim 1, characterized in that, The magnetically controlled preservation component (2) includes a barrel (21) having the preservation chamber (20) and an air guide (22) disposed on the top of the barrel (21). The air guide (22) is provided with an air guide channel (220) which is connected to the preservation air supply duct (43).

8. The refrigerator according to claim 7, characterized in that, The magnetically controlled preservation assembly (2) also includes a heat insulation component (23) disposed between the air guide (22) and the top of the barrel (21).

9. The refrigerator according to claim 8, characterized in that, The thickness of the heat insulation component (23) is ≥2mm.

10. The refrigerator according to claim 8, characterized in that, The magnetically controlled preservation component (2) also includes a magnetic field module, which is located above the heat insulation component (23) and below the air guide component (22).

11. A method for controlling a refrigerator, characterized in that, The refrigerator is the refrigerator according to claim 1, and the refrigerator further includes a fresh-keeping air damper disposed in the fresh-keeping air supply duct (43), and the control method includes the following steps: The temperature T inside the fresh food storage compartment (20) is detected and compared with the preset maximum temperature T inside the fresh food storage compartment (20). 高 Temperature difference comparison; If the temperature T inside the fresh food storage room (20) is different from the preset maximum temperature T inside the fresh food storage room (20) 高 If the temperature difference is greater than the preset threshold, the preservation air damper will be kept open; otherwise, the preservation air damper will be controlled to perform intermittent opening and closing cycles. Continuously monitor the temperature T inside the fresh food storage compartment (20). If the temperature T inside the fresh food storage compartment (20) is less than or equal to the preset minimum temperature T inside the fresh food storage compartment (20), then... 低 Then, the preservation air damper will be closed.

12. The refrigerator control method according to claim 11, characterized in that, The intermittent opening and closing cycle of the preservation air damper specifically includes: The timer starts after the preservation air damper is opened, and the opening time t is recorded. 开 Compared with the first preset time a, if the preservation air damper is open for time t 开 If the time is greater than or equal to the first preset time a, then the preservation air damper will be closed. The timer starts after the preservation air damper is closed, and the closing time t of the preservation air damper is recorded. 关 Compared with the second preset time b, if the preservation air damper closes for time t 关 If the time is greater than or equal to the second preset time b, then the preservation air damper will be opened.

13. The refrigerator control method according to claim 11, characterized in that, The air duct assembly (4) further includes a refrigeration air duct (41) connecting the evaporator chamber and the refrigerator compartment. The refrigerator also includes a refrigeration damper disposed in the refrigeration air duct (41). The fresh-keeping damper and the refrigeration damper are controlled to open or close by a dual-control switch. When the temperature T in the fresh-keeping compartment (20) is less than or equal to the preset minimum temperature T in the fresh-keeping compartment (20), the refrigerator is further protected by the refrigeration damper. 低 After the preservation air damper is closed, it remains closed for a third preset time c.

14. The refrigerator control method according to claim 13, characterized in that, The first preset time a + the second preset time b ≥ 15 min, and the third preset time c ≥ 5 min.

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