Refrigerator defrosting air duct structure and refrigerator

Abstract

The utility model relates to the technical field of refrigeration equipment, and provides a refrigerator defrosting air duct structure and a refrigerator, the refrigerator defrosting air duct structure comprises a box body, a wind shield and a shape memory alloy spring, the box body comprises a refrigeration air duct and a ventilation opening, the refrigeration air duct communicates with a refrigeration chamber of the refrigerator through the ventilation opening, and the wind shield is movably arranged at the ventilation opening; the shape memory alloy spring is connected with the wind shield and used for driving the wind shield to close the ventilation opening when the temperature is higher than the first temperature. The shape memory alloy spring drives the wind shield to move to close the ventilation opening, and in the defrosting process, when the electric heater starts to work and the temperature in the air duct rises, the shape memory alloy spring can respond to temperature change and drive the wind shield to close the ventilation opening through the unique thermally-induced deformation characteristic of the shape memory alloy spring. High-temperature air in the air duct is effectively isolated and prevented from flowing into the refrigeration chamber, so that the temperature of the refrigeration chamber is prevented from rising, and the stability of a food storage environment in the refrigeration chamber is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration equipment, and in particular to a refrigerator defrosting air duct structure and a refrigerator. BACKGROUND

[0002] In the current evaporator defrosting technology, an electric heater is generally used for heating, which is usually installed at the bottom of the finned evaporator. During the defrosting process, the electric heater is started to work, while the compressor is in a shutdown state. With the gradual rise of the surface temperature of the electric heater, the frost layer on the surface of the evaporator is melted through the heat radiation of the heater surface and the heat convection of the air around the evaporator. However, during the defrosting process, the temperature in the evaporator area rises significantly, while the temperature in the freezer compartment is relatively low, resulting in hot air flowing into the freezer compartment through the freezer air outlet, causing the temperature in the freezer compartment to rise, which adversely affects food storage. CONTENT OF THE UTILITY MODEL

[0003] The refrigerator defrosting air duct structure and the refrigerator provided by the embodiments of the present application solve the problem of temperature rise in the freezer compartment during the defrosting process of the existing refrigerator.

[0004] In a first aspect, the embodiments of the present application provide a refrigerator defrosting air duct structure, comprising:

[0005] a cabinet comprising a refrigeration air duct and a ventilation opening, the refrigeration air duct being connected to a refrigeration compartment of the refrigerator through the ventilation opening;

[0006] a wind baffle movably arranged at the ventilation opening;

[0007] a shape memory alloy spring connected to the wind baffle, the shape memory alloy spring driving the wind baffle to close the ventilation opening when the temperature is higher than a first temperature.

[0008] In some embodiments of the present application, the shape memory alloy spring is in a contracted state when the temperature is lower than a second temperature, and the wind baffle opens the ventilation opening, and the first temperature is greater than the second temperature.

[0009] In some embodiments of the present application, the refrigerator defrosting air duct structure further comprises a mounting seat, the mounting seat is mounted on the cabinet, and the two ends of the shape memory alloy spring are respectively connected to the mounting seat and the wind baffle.

[0010] In some embodiments of the present application, the cabinet is provided with a plurality of adjusting holes along the length direction of the shape memory alloy spring, and the mounting seat is detachably connected to the adjusting holes.

[0011] In some embodiments of the present application, the defrosting air duct structure of the refrigerator further comprises a guide seat, the guide seat is installed on the cabinet, and the guide seat is formed with a guide clamping groove, and the baffle plate is slidingly arranged in the guide clamping groove.

[0012] In some embodiments of the present application, the guide seat comprises a connecting portion and guide portions formed by bending opposite ends of the connecting portion, the guide portions are formed with the guide clamping groove, and the connecting portion and the guide portions are arranged around the outer side of the air vent.

[0013] In some embodiments of the present application, the guide clamping groove is provided with a first limiting portion for limiting the baffle plate from being separated from the guide clamping groove.

[0014] And / or, the guide clamping groove is provided with a second limiting portion away from one end of the shape memory alloy spring.

[0015] In some embodiments of the present application, the baffle plate is connected with the shape memory alloy spring on opposite sides.

[0016] In some embodiments of the present application, the number of air vents is multiple, and each air vent is provided with the baffle plate and the shape memory alloy spring.

[0017] In a second aspect, the embodiments of the present application further provide a refrigerator, which comprises the defrosting air duct structure of the refrigerator according to the above embodiments.

[0018] The defrosting air duct structure of the refrigerator provided by the embodiments of the present application comprises a cabinet, a baffle plate and a shape memory alloy spring, the cabinet comprises a refrigeration air duct and an air vent, the refrigeration air duct is connected to a refrigeration compartment of the refrigerator through the air vent, the baffle plate is movably arranged in the air vent, the shape memory alloy spring is connected with the baffle plate, and the shape memory alloy spring drives the baffle plate to close the air vent when the temperature is higher than a first temperature. The baffle plate is driven to move by the shape memory alloy spring to close the air vent. During the defrosting process, when the electric heater starts to work and the temperature in the air duct rises to the first temperature, the shape memory alloy spring utilizes its unique thermal deformation characteristics to respond to the temperature change and drive the baffle plate to close the air vent, so that the high-temperature air in the air duct is effectively isolated and prevented from flowing into the refrigeration compartment, thereby avoiding the temperature rise of the refrigeration compartment and ensuring the stability of the food storage environment in the refrigeration compartment.

[0019] Additional aspects and advantages of the present application will be in part apparent and in part pointed out hereinafter. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments will be briefly introduced. Obviously, the drawings in the following description only constitute some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0021] In order to more completely understand the present application and its beneficial effects, the following will be described with reference to the drawings. In the following description, the same reference numbers represent the same parts.

[0022] Figure 1 The structure diagram of the defrosting air duct structure of the refrigerator provided in the embodiments of the present application Figure 1 .

[0023] Figure 2 The partial enlarged diagram of A in the embodiments of the present application Figure 1

[0024] Figure 3 The installation diagram of the shape memory alloy spring provided in the embodiments of the present application Figure 1 .

[0025] Figure 4 The installation diagram of the shape memory alloy spring provided in the embodiments of the present application Figure 2 .

[0026] Figure 5 The structure diagram of the guide seat provided in the embodiments of the present application

[0027] Reference signs:

[0028] 100, cabinet; 110, air vent;

[0029] 200, baffle;

[0030] 300, shape memory alloy spring;

[0031] 400, mounting seat;

[0032] 500, guide seat; 510, connecting part; 520, guiding part. DETAILED DESCRIPTION

[0033] The embodiments of the present application will be further described in detail below with reference to the drawings and embodiments. The following embodiments are used to illustrate the present application, but cannot be used to limit the scope of the present application.

[0034] ​In the description of the embodiments of this application, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application. In addition, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" 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. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this application based on the specific circumstances.

[0036] In the embodiments of this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0037] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the embodiments of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0038] With the popularization of air-cooled refrigerators, single-system air-cooled refrigerators with high refrigeration efficiency and cost performance gradually become the mainstream of consumption. The refrigeration system of a refrigerator is composed of an evaporator, a compressor, a condenser, a drying filter and a capillary tube. The evaporator is generally located in the freezer compartment. Its main function is to maintain the low temperature of the compartment by absorbing the heat of the compartment through heat exchange when the refrigerator is running. When the evaporator exchanges heat with the air in the compartment, water vapor in the compartment adheres to the surface of the evaporator to form frost, so the fin evaporator needs to be defrosted regularly.

[0039] The defrosting of the fin evaporator is generally heated by an electric heater, which is located at the bottom of the fin evaporator. When the evaporator is defrosted, the heater works and the compressor stops. As the surface temperature of the heater gradually rises, the defrosting effect is achieved through heat radiation of the heater surface and heat convection formed by the air around the evaporator. However, during defrosting, the temperature in the evaporator space is relatively high, and the temperature in the freezer compartment is relatively low. Hot air will flow from the freezer air outlet to the freezer compartment, thereby increasing the temperature of the freezer compartment and adversely affecting food storage and defrosting rate and effect.

[0040] The refrigerator defrosting air duct structure and the refrigerator provided by the embodiments of the present application can be applied to a refrigerator. The refrigerator can be a single-door refrigerator, a double-door refrigerator or a triple-door refrigerator, which is not limited in the present application. Figures 1-5 The refrigerator defrosting air duct structure and the refrigerator provided by the embodiments of the present application can be applied to a refrigerator. The refrigerator can be a single-door refrigerator, a double-door refrigerator or a triple-door refrigerator, which is not limited in the present application.

[0041] The refrigerator defrosting air duct structure and the refrigerator provided by the embodiments of the present application can be applied to a refrigerator. The refrigerator can be a single-door refrigerator, a double-door refrigerator or a triple-door refrigerator, which is not limited in the present application.

[0042] According to one embodiment of the present application, as shown in Figure 1 and Figure 2 The refrigerator defrosting air duct structure and the refrigerator provided by the embodiments of the present application can be applied to a refrigerator. The refrigerator can be a single-door refrigerator, a double-door refrigerator or a triple-door refrigerator, which is not limited in the present application.

[0043] It can be understood that, in the present embodiment, the cabinet 100 includes a refrigeration air duct and a ventilation opening; the refrigeration compartment is the part of the refrigerator for storing food materials, which needs to be kept at a constant low temperature to preserve food, and the refrigeration compartment can include a refrigeration compartment, a freezer compartment or a variable temperature compartment. The ventilation opening 110 is located between the refrigeration air duct and the refrigeration compartment, and is used to allow cold air to flow from the refrigeration air duct into the refrigeration compartment for refrigeration in the normal refrigeration mode.

[0044] The baffle 200 is a movable component, which is arranged at the vent 110, and functions to prevent hot air from flowing into the refrigeration compartment from the cooling air duct during the defrosting process, thereby protecting the food from temperature fluctuation.

[0045] The shape memory alloy spring 300 has the property of shape memory, i.e. it can recover to a predetermined shape at a specific temperature. By connecting one end of the shape memory alloy spring 300 to the baffle 200 and fixing the other end at a proper position of the cabinet 100, when the refrigerator enters the defrosting mode and the heater starts to work, the temperature in the cooling air duct rises to a first temperature, the shape memory alloy spring 300 will change its shape due to the temperature change, and push the baffle 200 to move, thereby closing the vent 110. When the defrosting is completed and the temperature decreases, the shape memory alloy spring 300 returns to its original shape, and the baffle 200 opens, thereby restoring the normal air circulation between the cooling air duct and the refrigeration compartment.

[0046] In an alternative embodiment, the shape memory alloy spring 300 is arranged to be in an expanded state when the temperature is higher than the first temperature, and the baffle 200 closes the vent 110; the shape memory alloy spring 300 is arranged to be in a contracted state when the temperature is lower than a second temperature, and the baffle 200 opens the vent 110, and the first temperature is greater than the second temperature.

[0047] Alternatively, the shape memory alloy spring 300 can be arranged in the cooling air duct, and when the temperature in the cooling air duct is higher than a first temperature (a higher temperature threshold), the shape memory alloy spring 300 will trigger a phase change from martensite phase to austenite phase due to the temperature rise, and in this phase change process, the shape memory alloy spring 300 will recover to its predetermined shape, i.e. the expanded state, to drive the baffle 200 to move, thereby closing the vent 110, which can prevent hot air from flowing into the refrigeration compartment during the defrosting process of the refrigerator, and maintain the low temperature of the food storage environment.

[0048] When the temperature is lower than a second temperature (a lower temperature threshold), the shape memory alloy spring 300 remains in the martensite phase, and at this time it will be in a contracted state, and the contracted state of the shape memory alloy spring 300 is used to drive the baffle 200 to open the vent 110, allowing air circulation, so that the refrigerator can normally perform refrigeration.

[0049] In an alternative embodiment, the defrosting air duct structure of the refrigerator further comprises a mounting seat 400 mounted on the cabinet 100, and the two ends of the shape memory alloy spring 300 are connected to the mounting seat 400 and the baffle 200, respectively. Exemplarily, the mounting seat 400 is mounted near the air vent 110 to provide a stable support point for the shape memory alloy spring 300, so that the shape memory alloy spring 300 can drive the baffle 200 to move to an accurate position when the temperature changes, improving stability and reliability.

[0050] In an alternative embodiment, the cabinet 100 is provided with a plurality of adjusting holes (not shown in the figure) along the length direction of the shape memory alloy spring 300, and the mounting seat 400 is detachably connected to the adjusting holes. By providing a plurality of adjusting holes, the positions of the mounting seat 400 and the shape memory alloy spring 300 can be flexibly adjusted as needed to achieve the adjustment and optimization of the pre-tightening force of the shape memory alloy spring 300.

[0051] In an alternative embodiment, referring to Figure 2 and Figure 3 , the defrosting air duct structure of the refrigerator further comprises a guide seat 500 mounted on the cabinet 100, and the guide seat 500 is formed with a guide clamping groove (not shown in the figure), and the baffle 200 is slidingly arranged in the guide clamping groove.

[0052] In this embodiment, the guide seat 500 is provided to guide the movement of the baffle 200, and the guide clamping groove of the guide portion 520 provides an accurate sliding path for the baffle 200, ensuring the accurate position of the baffle 200 when opening and closing the air vent 110, so that the baffle 200 can move smoothly, thereby realizing that the baffle 200 can accurately close the air vent 110 during defrosting, and ensuring smooth switching between the defrosting and normal refrigeration states of the baffle 200.

[0053] In an alternative embodiment, in combination with Figure 2 and Figure 5 , the guide seat 500 comprises a connecting portion 510 and a guide portion 520 formed by bending the opposite ends of the connecting portion 510, the guide portion 520 is formed with a guide clamping groove, and the connecting portion 510 and the guide portion 520 are arranged around the outside of the air vent 110. The design of the connecting portion 510 and the guide portion 520 improves the compactness and stability of the guide seat 500, and the connecting portion 510 and the guide portion 520 are arranged around the outside of the air vent 110, ensuring that the baffle 200 can closely fit the edge of the air vent 110 when closed, effectively blocking the penetration of hot air during defrosting, improving the sealing performance of the air vent 110, and reducing the possibility of leakage.

[0054] In an optional embodiment, the guide slot is provided with a first limiting portion (not shown in the figure) for limiting the deflector 200 from being separated from the guide slot; in an optional embodiment, the guide slot is provided with a second limiting portion (not shown in the figure) at the end away from the shape memory alloy spring 300; in another optional embodiment, the guide slot is provided with both the first limiting portion and the second limiting portion.

[0055] In the present embodiment, the first limiting portion is provided for limiting the deflector 200 from being separated from the guide slot during sliding, thereby ensuring the stable position of the deflector 200 in the defrosting and non-defrosting states; the second limiting portion is located at the end of the guide slot away from the shape memory alloy spring 300, which provides a fixed stopping point for the deflector 200, thereby ensuring the accurate alignment of the deflector 200 in the fully open or closed position.

[0056] The first limiting portion and the second limiting portion can be in the form of buckles, protrusions or elastic elements, and the present embodiment does not make specific limitations thereon. Through the design of the limiting portions, the safety and reliability of the defrosting air duct structure of the refrigerator are improved.

[0057] In an optional embodiment, referring to Figure 4 , the deflector 200 is connected with the shape memory alloy spring 300 at opposite sides, so that the deflector 200 moves stably during movement along the guide slot, thereby ensuring that the deflector 200 can better close the air vent 110 and improve the sealing performance.

[0058] In an optional embodiment, referring to Figure 1 and Figure 2 , the number of air vents 110 is multiple, and each air vent 110 is provided with the deflector 200 and the shape memory alloy spring 300 correspondingly, the multiple air vents 110 can be connected to different refrigeration compartments or to the same refrigeration compartment, thereby improving the ventilation efficiency, and each air vent 110 is provided with the deflector 200 and the shape memory alloy spring 300 correspondingly, thereby ensuring that the defrosting state of the refrigeration air duct can be isolated from the refrigeration compartment, avoiding affecting the temperature of the refrigeration compartment, and improving the defrosting efficiency.

[0059] The refrigerator defrosting air duct structure provided by the embodiments of the present application comprises a cabinet 100, a baffle 200 and a shape memory alloy spring 300. The cabinet 100 comprises a refrigeration air duct and a ventilation opening 110. The refrigeration air duct is connected to a refrigeration compartment of the refrigerator through the ventilation opening 110. The baffle 200 is movably arranged at the ventilation opening 110. The shape memory alloy spring 300 is connected to the baffle 200 and drives the baffle 200 to close the ventilation opening 110 when the temperature is higher than a first temperature. The baffle 200 is driven to move by the shape memory alloy spring 300 to close the ventilation opening 110. During the defrosting process, when the electric heater starts to work and the temperature in the air duct rises to the first temperature, the shape memory alloy spring 300 can respond to the temperature change and drive the baffle 200 to close the ventilation opening 110 by using the unique thermal deformation characteristics of the shape memory alloy spring 300. The high-temperature air in the air duct is effectively isolated, which prevents the high-temperature air from flowing into the refrigeration compartment, thereby avoiding the temperature rise of the refrigeration compartment and ensuring the stability of the food storage environment in the refrigeration compartment.

[0060] Further, the baffle 200 separates the refrigeration air duct and the refrigeration compartment, so that the space around the evaporator (the refrigeration air duct) is a closed space. The hot air can be gathered around the evaporator, which improves the defrosting efficiency, shortens the defrosting time and reduces the overall energy consumption of the refrigerator.

[0061] In the second aspect, the embodiments of the present application further provide a refrigerator. The refrigerator comprises the refrigerator defrosting air duct structure according to any one of the above embodiments.

[0062] The refrigerator can be a single-door refrigerator, a double-door refrigerator or a triple-door refrigerator. By applying the refrigerator defrosting air duct structure according to the above embodiments, the refrigeration air duct and the refrigeration compartment can be separated during the defrosting process, the temperature in the refrigeration compartment is maintained stable, the storage of food materials in the refrigeration compartment is not affected, the defrosting efficiency of the refrigerator is improved and the energy consumption is saved.

[0063] It can be understood that the refrigerator defrosting air duct structure has the beneficial effects of the above embodiments, and the refrigerator accordingly has the beneficial effects of the above embodiments. The specific embodiments are referable to the above embodiments, which will not be described herein.

[0064] Finally, it should be noted that the above embodiments are only used to illustrate the present application, but not to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications or equivalent replacements of the technical solutions of the present application do not deviate from the spirit and scope of the present application, and should be covered in the protection scope of the present application.

Claims

1. A defrosting air duct structure of a refrigerator, characterized by, The refrigerator defrosting air duct structure comprises: a box body (100) comprising a refrigeration air duct and a ventilation opening; the refrigeration air duct is communicated with a refrigeration compartment of the refrigerator through the ventilation opening; a baffle (200) movably arranged at the ventilation opening (110); a shape memory alloy spring (300) connected with the baffle (200), the shape memory alloy spring (300) drives the baffle (200) to close the ventilation opening (110) when the temperature is higher than a first temperature.

2. The defrosting air duct structure of the refrigerator according to claim 1, characterized in that, the shape memory alloy spring (300) is in a contracted state when the temperature is lower than a second temperature, the baffle (200) opens the ventilation opening (110), and the first temperature is greater than the second temperature. 3.The defrosting air duct structure of a refrigerator according to claim 1, wherein The refrigerator defrosting air duct structure further comprises a mounting seat (400) mounted on the box body (100), and two ends of the shape memory alloy spring (300) are connected with the mounting seat (400) and the baffle (200) respectively. 4.The defrosting air duct structure of a refrigerator according to claim 3, characterized in that, The box body (100) is provided with a plurality of adjusting holes along the length direction of the shape memory alloy spring (300), and the mounting seat (400) is detachably connected with the adjusting holes. 5.The defrosting air duct structure of a refrigerator according to claim 1, wherein The refrigerator defrosting air duct structure further comprises a guide seat (500) mounted on the box body (100), and the guide seat (500) is formed with a guide clamping groove, and the baffle (200) is slidably arranged in the guide clamping groove. 6.The defrosting air duct structure of a refrigerator according to claim 5, wherein The guide seat (500) comprises a connecting portion (510) and a guide portion (520) formed by bending opposite ends of the connecting portion (510), the guide portion (520) is formed with the guide clamping groove, and the connecting portion (510) and the guide portion (520) are arranged outside the ventilation opening (110). 7.The defrosting air duct structure of a refrigerator according to claim 5, wherein The guide clamping groove is provided with a first limiting portion for limiting the baffle (200) from being separated from the guide clamping groove. And / or, the guide clamping groove is provided with a second limiting portion away from one end of the shape memory alloy spring (300). 8.The defrosting air duct structure of a refrigerator according to claim 1, wherein, The baffle (200) is connected with the shape memory alloy spring (300) on opposite sides. 9.The defrosting air duct structure of a refrigerator according to claim 1, wherein, The number of the ventilation openings (110) is plural, and each of the ventilation openings (110) is provided with the baffle (200) and the shape memory alloy spring (300) correspondingly.

10. A refrigerator characterized by comprising: The refrigerator comprises the refrigerator defrosting air duct structure according to any one of claims 1-9.

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