Refrigerator

Abstract

The embodiment of the utility model belongs to the refrigeration technology and provides a refrigerator which comprises a refrigerator body, a freezing air duct and a refrigerating air duct which are circularly connected with a main air duct are arranged in the refrigerator body, and an evaporator and a heater are arranged in the main air duct. When the surface of the evaporator is frosted, the heater is started to defrost the evaporator. The circulating air outlet end of the main air duct is connected with the freezing air duct and the refrigerating air duct, so that cold air in the main air duct can enter the freezing air duct and the refrigerating air duct for refrigeration, and the circulating air return end of the main air duct is connected with the freezing air duct and the refrigerating air duct. And air in the freezing air duct and the refrigerating air duct can flow back to the main air duct to exchange heat with the evaporator again so as to form cold air circulation. The connecting positions of the freezing air duct and the circulating air outlet end and the circulating air inlet end can be closed, so that cold air in the freezing chamber cannot circularly flow back into the main air duct, the temperature in the main air duct can be increased to a certain extent, and the defrosting efficiency of the evaporator is higher.

Description

Technical Field

[0001] The embodiments of the present application relate to refrigeration technology, and more particularly to a refrigerator. Background Art

[0002] After long-term use, frost will form on the evaporator of the refrigerator, which will reduce the refrigeration effect of the refrigerator. Therefore, it is necessary to deal with the frost on the evaporator. Specifically, an electric heater can be installed near the evaporator in the refrigerator. After the electric heater is powered on and heated, the frost on the evaporator can be melted.

[0003] At present, the heating effect of the electric heater on the side of the evaporator relatively far from the electric heater in the single-cycle refrigerator is relatively poor, which will lead to incomplete defrosting of the evaporator and further lead to poor refrigeration effect of the refrigerator. Utility Model Content

[0004] The embodiment of the present application provides a refrigerator, which can solve the problem of poor defrosting effect of refrigerators in the related art.

[0005] The present application provides a refrigerator, comprising:

[0006] A box body, wherein the box body has a main air duct, a freezing air duct and a refrigerating air duct, the main air duct has a circulating return air end and a circulating air outlet end, one end of the refrigerating air duct is connected to the circulating air outlet end, and the other end of the refrigerating air duct is connected to the circulating return air end;

[0007] an evaporator, arranged in the main air duct;

[0008] A heater is arranged in the main air duct;

[0009] Among them, one end of the refrigeration air duct is configured to be connected or disconnected with the circulating air outlet end, and the other end of the refrigeration air duct is configured to be connected or disconnected with the circulating air return end.

[0010] In the refrigerator proposed in the present application, the evaporator arranged in the main air duct can exchange heat with the air in the main air duct, so that the air temperature in the main air duct can be reduced to form cold gas. The circulating air outlet end of the main air duct is connected to both the freezing air duct and the refrigerating air duct, so that the cold gas in the main air duct can enter the freezing air duct and the refrigerating air duct for refrigeration, and the circulating air return end of the main air duct is connected to both the freezing air duct and the refrigerating air duct, so that the gas in the freezing air duct and the refrigerating air duct can flow back to the main air duct and exchange heat with the evaporator again to form a cold gas circulation. When frost appears on the surface of the evaporator, the heater is started to defrost the evaporator. The connection between the freezing air duct and the circulating air outlet end and the circulating air inlet end can be closed, so that the cold gas in the freezer cannot circulate back to the main air duct, thereby increasing the temperature in the main air duct to a certain extent, thereby making the evaporator defrosting more efficient.

[0011] In some embodiments of the present application, the refrigerator further comprises a first damper and a second damper, the freezing air duct has a first air inlet connected to the circulating air outlet end, the freezing air duct further has a first air outlet connected to the circulating air return end, the first damper is movably disposed at the first air inlet, and the first damper is configured to open and close the first air inlet;

[0012] The second damper is movably disposed at the first air outlet, and the second damper is configured to open and close the first air outlet.

[0013] The first air inlet and the first air outlet can be opened and closed by setting the first air door and the second air door, so that the freezing air duct can be connected or disconnected with the main air duct circulation.

[0014] In some embodiments of the present application, the first damper includes a plurality of first plates, the plurality of first plates are rotatably disposed at the first air inlet, and the plurality of first plates are disposed along the length or width direction of the first air inlet;

[0015] When the plurality of first plates are rotated to form gaps between adjacent first plates, the first air inlet is connected to the circulating air outlet end; when the plurality of first plates are rotated to form connections between adjacent first plates, the first air inlet is disconnected from the circulating air outlet end.

[0016] The first air inlet can be opened and closed by rotating the multiple first plates, making the opening and closing of the first air inlet simple. Moreover, the volume of a single first plate among the multiple first plates is relatively small, and the range of motion of a single first plate when rotating is relatively small.

[0017] In some embodiments of the present application, the refrigerator also includes a third damper, the refrigeration air duct has a second air inlet connected to the circulating air outlet end, the refrigeration air duct also has a second air outlet connected to the circulating air return end, the third damper is movably arranged at the second air inlet, and the third damper is configured to open and close the second air inlet.

[0018] By setting the third air door, the refrigeration air duct and the main air duct can be controlled to be connected or disconnected. When the refrigerator needs to defrost the evaporator, the refrigeration air duct is connected to the main air duct, and the relatively high temperature gas in the refrigeration air duct can enter the main air duct, so that the temperature in the main air duct increases, thereby improving the defrosting efficiency.

[0019] In some embodiments of the present application, the refrigerator further includes a fan, which is disposed in the main air duct and configured to drive the gas in the main air duct to flow from the circulating air return end to the circulating air outlet end.

[0020] By setting up a fan, the gas in the main air duct can flow from the circulating air return end to the circulating air outlet end.

[0021] In some embodiments of the present application, the main air duct also includes a first air duct section and a second air duct section connected to each other, the circulating return air end is located on a side of the first air duct section away from the second air duct section, the circulating air outlet end is located on a side of the second air duct section away from the first air duct section, the evaporator and the heater are arranged in the first air duct section, and the fan is arranged between the first air duct section and the second air duct section.

[0022] By arranging the fan, evaporator and heater at different positions in the main air duct, the fan, evaporator and heater can be prevented from interfering with each other. The volume of the second air duct section is smaller than that of the first air duct section, so that the air pressure in the second air duct section is relatively higher, so that the gas in the main air duct can be more efficiently input into the freezing air duct and the refrigeration air duct.

[0023] In some embodiments of the present application, the box body has a partition located between the first air duct section and the second air duct section, the partition is provided with a mounting hole, and the fan is embedded in the mounting hole.

[0024] The fan can be conveniently installed in the main air duct by setting a partition.

[0025] In some embodiments of the present application, the axial direction of the fan is perpendicular to the flow direction of the gas in the first air duct segment.

[0026] By arranging the axial direction of the fan to be perpendicular to the gas flow direction in the first air duct section, the fan can be arranged more compactly in the main air duct.

[0027] In some embodiments of the present application, the orientation of the first air inlet is parallel to the axial direction of the fan, and the orientation of the second air inlet is perpendicular to the axial direction of the fan.

[0028] By arranging the first air inlet in parallel with the axial direction of the fan, the gas flow rate outputted by the fan through the first air inlet can be relatively larger. By arranging the second air inlet in perpendicular to the axial direction of the fan, the gas flow rate outputted by the fan through the second air inlet can be relatively smaller.

[0029] In some embodiments of the present application, the fan and the first air inlet are staggered.

[0030] In this way, it can be avoided that the gas flow output by the fan through the first air inlet is too large, ensuring that the temperature in the freezing air duct will not be too low and the temperature in the refrigeration air duct will not be too high. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0032] Figure 1 A schematic diagram of a refrigerator according to an embodiment of the present application;

[0033] Figure 2 A schematic diagram of a refrigeration air duct of a refrigerator according to an embodiment of the present application;

[0034] Figure 3 A schematic diagram of a main air duct of a refrigerator according to an embodiment of the present application;

[0035] Figure 4 for Figure 3 A schematic diagram showing the enlarged display of the middle A area;

[0036] Figure 5 A schematic diagram of a first plate body of a refrigerator according to an embodiment of the present application;

[0037] Figure 6 A schematic diagram of a freezing air duct of a refrigerator according to an embodiment of the present application;

[0038] Figure 7 A schematic diagram of a fan of a refrigerator according to an embodiment of the present application;

[0039] Figure 8 for Figure 6 Schematic cross-section of the middle BB;

[0040] Fig. 9 A schematic diagram of a second air inlet in a refrigerator according to an embodiment of the present application;

[0041] Fig.10 This is a schematic diagram of the circulating air outlet end of the refrigerator according to an embodiment of the present application.

[0042] Reference numerals:

[0043] 100-box, 110-main air duct, 111-circulation return air end, 112-circulation air outlet end, 113-first air duct section, 114-second air duct section, 120-freezing air duct, 121-first air inlet, 122-first air outlet, 130-refrigeration air duct, 131-second air inlet, 132-second air outlet, 140-first air door, 141-first plate, 150-second air door, 160-third air door, 170-partition, 171-installation hole,

[0044] 200-evaporator,

[0045] 300-heater,

[0046] 400-Blower. DETAILED DESCRIPTION

[0047] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0048] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their ordinary and common meanings.

[0049] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0050] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0051] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0052] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0053] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0054] After long-term use, frost will form on the evaporator of the refrigerator, which will reduce the refrigeration effect of the refrigerator. Therefore, it is necessary to deal with the frost on the evaporator. Specifically, an electric heater can be installed near the evaporator in the refrigerator. After the electric heater is powered on and heated, the frost on the evaporator can be melted.

[0055] At present, the heating effect of the electric heater on the side of the evaporator relatively far from the electric heater in the single-cycle refrigerator is relatively poor, which will lead to incomplete defrosting of the evaporator and further lead to poor refrigeration effect of the refrigerator.

[0056] In the refrigerator proposed in the present application, the evaporator arranged in the main air duct can exchange heat with the air in the main air duct, so that the air temperature in the main air duct can be reduced to form cold gas. The circulating air outlet end of the main air duct is connected to both the freezing air duct and the refrigerating air duct, so that the cold gas in the main air duct can enter the freezing air duct and the refrigerating air duct for refrigeration, and the circulating air return end of the main air duct is connected to both the freezing air duct and the refrigerating air duct, so that the gas in the freezing air duct and the refrigerating air duct can flow back to the main air duct and exchange heat with the evaporator again to form a cold gas circulation. When frost appears on the surface of the evaporator, the heater is started to defrost the evaporator. The connection between the freezing air duct and the circulating air outlet end and the circulating air inlet end can be closed, so that the cold gas in the freezer cannot circulate back to the main air duct, thereby increasing the temperature in the main air duct to a certain extent, thereby making the evaporator defrosting more efficient.

[0057] This application proposes a refrigerator, referring to Figure 1 to Figure 2 As shown, the refrigerator includes a box 100, which is a basic component of the refrigerator of the present application. The box 100 can provide a mounting base for at least part of other components of the refrigerator and protect at least part of other components. The box 100 can be made of metal material, so that the box 100 has a better structural strength, thereby making the durability and reliability of the box 100 better. Of course, the box 100 can also be made of polymer material, so that the box 100 has a better structural strength and is relatively light, which can make the weight of the refrigerator lighter.

[0058] The refrigerator further includes an evaporator 200, which is disposed in the housing 100. A coolant can flow in the evaporator 200. The evaporator 200 can exchange heat with the air in the housing 100 to reduce the temperature of the air. Specifically, the housing 100 has a main air duct 110, which is an inner cavity structure in the housing 100. The main air duct 110 has a circulating return air end 111 and a circulating air outlet end 112. The gas in the main air duct 110 can circulate in the direction from the circulating return air end 111 to the circulating air outlet end 112. The evaporator 200 is disposed in the main air duct 110, and the gas flowing through the main air duct 110 can contact and exchange heat with the evaporator 200, so that the temperature of the gas is reduced.

[0059] The box body 100 also has a refrigeration air duct 130, one end of which can be connected to the circulating return air end 111 of the main air duct 110, and the other end of which can be connected to the circulating air outlet end 112 of the main air duct 110. The refrigeration air duct 130 can also be connected to the refrigeration chamber in the box body 100 of the refrigerator. The gas cooled by the evaporator 200 in the main air duct 110 can enter the refrigeration air duct 130 through the circulating air outlet end 112, and enter the refrigeration chamber, so that the temperature of the refrigeration chamber can be reduced to the refrigeration temperature. The gas in the refrigeration chamber can flow back to the refrigeration air duct 130, and flow back to the main air duct 110 through the circulating return air end 111 of the main air duct 110 to exchange heat with the evaporator 200 again to reduce the temperature. The gas that has been heat exchanged and cooled again in the main air duct 110 can be circulated into the refrigeration air duct 130 again, so that the temperature in the refrigeration air duct 130 can be maintained at a refrigeration temperature.

[0060] The housing 100 also has a freezing air duct 120, one end of which can be connected to the circulating return air end 111 of the main air duct 110, and the other end of which can be connected to the circulating air outlet end 112 of the main air duct 110, and the freezing air duct 120 can also be communicated with the freezing chamber in the housing 100 of the refrigerator. The gas cooled by the evaporator 200 in the main air duct 110 can enter the freezing air duct 120 through the circulating air outlet end 112, and enter the freezing chamber, so that the temperature of the freezing chamber can be reduced to a freezing temperature. The gas in the freezing chamber can flow back to the freezing air duct 120, and flow back to the main air duct 110 through the circulating return air end 111 of the main air duct 110 to exchange heat with the evaporator 200 again to cool down. The gas cooled by heat exchange again in the main air duct 110 can be circulated to the freezing air duct 120 again, so that the temperature in the freezing air duct 120 can be kept at a freezing temperature.

[0061] The refrigerator of the present application also includes a heater 300, which is arranged in the main air duct 110 of the box 100. It should be understood that the evaporator 200 maintains a low temperature state for a long time during the operation of the refrigerator, and the moisture in the main air duct 110 contacts the evaporator 200 and frosts on the surface of the evaporator 200, thereby reducing the performance of the evaporator 200. The heater 300 can generate heat, so that the temperature in the main air duct 110 is increased, so that the frost on the surface of the evaporator 200 in the main air duct 110 can be melted, and then the evaporator 200 can work normally. Specifically, the electric heater 300 can specifically adopt a resistance wire structure, and the resistance wire can generate heat after being energized. The electric heater 300 can be arranged close to the evaporator 200, so that the electric heater 300 can melt the frost on the surface of the evaporator 200 better.

[0062] One end of the freezing air duct 120 in the housing 100 is configured to be connectable or disconnectable with the circulating air outlet end 112, and the other end of the freezing air duct 120 is configured to be connectable or disconnectable with the circulating air return end 111. When the freezing air duct 120 is disconnected from both the circulating air outlet end 112 and the circulating air return end 111, the gas in the main air duct 110 cannot enter the freezing air duct 120 after being discharged through the circulating air outlet end 112, and the cold gas with a relatively lower temperature in the freezing air duct 120 cannot flow back into the main air duct 110 through the circulating air return end 111 of the main air duct 110, thereby preventing the cold gas in the freezing air duct 120 from entering the main air duct 110 and further reducing the temperature of the main air duct 110. Therefore, when the evaporator 200 needs to be defrosted, the two ends of the freezing air duct 120 can be disconnected from the circulating return air end 111 and the circulating air outlet end 112 of the main air duct 110, and the electric heater 300 can be started. The temperature in the main air duct 110 can be further increased, so that the frost on the surface of the evaporator 200 can be fully melted, thereby improving the defrosting effect of the evaporator 200.

[0063] In some embodiments, reference Figure 1 and Figure 6As shown, the freezing air duct 120 in the box 100 of the present application has a first air inlet 121 connected to the circulating air outlet end 112 of the main air duct 110, and the cold gas in the main air duct 110 can enter the freezing air duct 120 through the first air inlet 121. In order to make one end of the freezing air duct 120 be connected or disconnected with the circulating air outlet end 112. The refrigerator of the present application also includes a first air door 140, wherein the first air door 140 is movably arranged at the first air inlet 121 of the freezing air duct 120, and the first air door 140 can be moved to block the first air inlet 121, so that the circulating air outlet end 112 of the main air duct 110 is disconnected from the freezing air duct 120. The first air door 140 can also be moved to open the first air inlet 121, so that the circulating air outlet end 112 of the main air duct 110 is connected to the freezing air duct 120, thereby realizing the connection or disconnection of the circulating air outlet end 112 of the main air duct 110 with the freezing air duct 120.

[0064] The freezing air duct 120 in the box 100 of the present application has a first air outlet 122 connected to the circulating return air end 111 of the main air duct 110, and the gas in the freezing air duct 120 can flow back into the main air duct 110 through the first air outlet 122. In order to make the other end of the freezing air duct 120 be configured to be connectable or disconnectable with the circulating return air end 111. The refrigerator of the present application also includes a second air door 150, wherein the second air door 150 is movably arranged at the first air outlet 122 of the freezing air duct 120, and the second air door 150 can be moved to block the first air outlet 122, so that the circulating return air end 111 of the main air duct 110 is disconnected from the freezing air duct 120. The second air door 150 can also be moved to open the first air outlet 122, so that the circulating return air end 111 of the main air duct 110 is connected to the freezing air duct 120, thereby realizing the connection or disconnection of the circulating return air end 111 of the main air duct 110 with the freezing air duct 120.

[0065] In some embodiments, reference Figure 1 , Figure 3 , Figure 4 and Figure 5As shown, the first damper 140 of the present application may be provided to include a plurality of first plates 141, and the plurality of first plates 141 may be rotatably provided at the first air inlet 121 of the freezing air duct 120, and the plurality of first plates 141 may be distributed along the width or length direction of the first air inlet 121. Among them, the plurality of first plates 141 may be rotated to be arranged at an angle with the plane where the first air inlet 121 is located or to be parallel. When the plurality of first plates 141 are rotated to be arranged at an angle with the plane where the first air inlet 121 is located, there is a gap between adjacent first plates 141, and the gas in the main air duct 110 may pass through the gap between the adjacent first plates 141 through the first air inlet 121 to enter the freezing air duct 120. When the plurality of first plates 141 rotate to be parallel to the plane where the first air inlet 121 is located, the plurality of first plates 141 can respectively block two parts of the first air inlet 121, so that the plurality of first plates 141 can jointly block the first air inlet 121, so that the circulating air outlet end 112 of the main air duct 110 is disconnected from the freezing air duct 120. In this way, by controlling the rotation of the plurality of first plates 141, the circulating air outlet end 112 of the main air duct 110 can be connected or disconnected from the freezing air duct 120.

[0066] The second damper 150 of the present application may be provided to include a plurality of second plates, which may be rotatably provided at the second air inlet 131 of the freezing air duct 120, and the plurality of second plates may be distributed along the width or length direction of the second air inlet 131. Among them, the plurality of second plates may be rotated to be arranged at an angle or parallel to the plane where the second air inlet 131 is located. When the plurality of second plates are rotated to be arranged at an angle to the plane where the second air inlet 131 is located, there is a gap between adjacent second plates, and the gas in the main air duct 110 may pass through the second air inlet 131 through the gap between adjacent second plates to enter the freezing air duct 120. When the plurality of second plates are rotated to be parallel to the plane where the second air inlet 131 is located, the plurality of second plates may respectively block the two parts of the second air inlet 131, so that the plurality of second plates may jointly block the second air inlet 131, so that the circulating return air end 111 of the main air duct 110 is disconnected from the freezing air duct 120. In this way, by controlling the rotation of the plurality of second plates, the circulating return air end 111 of the main air duct 110 can be connected to or disconnected from the freezing air duct 120 .

[0067] In some embodiments, reference Figure 2 , Figure 7 , Figure 8 , Fig. 9 and Fig.10As shown, the refrigerating air duct 130 of the present application may be provided with a second air inlet 131, and the second air inlet 131 of the refrigerating air duct 130 is provided at one end of the refrigerating air duct 130 connected to the circulating air outlet end 112 of the main air duct 110, and the gas in the main air duct 110 may enter the refrigerating air duct 130 through the second air inlet 131. The refrigerator of the present application may also be provided with a third air door 160, and the third air door 160 is movably provided at the second air inlet 131 of the refrigerating air duct 130, and the third air door 160 is configured to connect or disconnect the circulating air outlet end 112 of the main air duct 110 with the refrigerating air duct 130.

[0068] The refrigeration air duct 130 in the box 100 of the present application has a second air outlet 132 connected to the circulating return air end 111 of the main air duct 110 , and the gas in the refrigeration air duct 130 can flow back into the main air duct 110 through the second air outlet 132 .

[0069] It should be understood that since the gas in the refrigeration duct 130 needs to be passed into the refrigerator compartment of the refrigerator to refrigerate the food, and the refrigeration temperature can be set to 2°C-8°C, the temperature in the refrigeration duct 130 is higher than the temperature in the main duct 110 and the freezing duct 120. When the refrigerator of the present application needs to defrost the frost on the evaporator 200, the circulating air outlet end 112 of the main duct 110 can be connected to the refrigeration duct 130 through the third air door 160, so that the relatively high temperature gas in the refrigeration duct 130 can enter the main duct 110, so that the temperature in the main duct 110 increases, which is more conducive to defrosting the evaporator 200 in the main duct 110.

[0070] In addition, when the temperature in the refrigeration air duct 130 is too low, specifically below 2°C, the second air inlet 131 can be closed by the third air door 160. In this way, the relatively low temperature gas in the main air duct 110 no longer enters the refrigeration air duct 130 for circulation, so that the temperature of the refrigeration air duct 130 can be increased until the temperature of the refrigeration air duct 130 reaches the temperature required for refrigerating food.

[0071] In the present application, the second damper 150 and the third damper 160 may adopt a structure similar to that of the first damper 140. Specifically, both may include a plurality of rotatable plates, and the first air outlet 122, the second air inlet 131 and the second air outlet 132 may be opened and closed by rotating the plurality of plates.

[0072] In some embodiments, reference Figures 1 to 3As shown, the refrigerator of the present application may also be provided with a fan 400, which may be provided in the main air duct 110, and the fan 400 may drive the gas in the main air duct 110 to flow in the direction from the circulating return air end 111 to the circulating air outlet end 112. The main air duct 110 may be provided with a first air duct section 113 and a second air duct section 114, the first air duct section 113 is connected to the second air duct section 114, the circulating return air end 111 is located at a side of the first air duct section 113 away from the second air duct section 114, the circulating air outlet end 112 is located at a side of the second air duct section 114 away from the first air duct section 113, and the gas in the main air duct 110 may flow from the first air duct section 113 to the second air duct section 114. The evaporator 200 and the heater 300 can be arranged in the first air duct section 113, and the fan 400 can be arranged between the first air duct section 113 and the second air duct section 114, so that the evaporator 200 and the fan 400 can be installed in different positions in the main air duct 110 in an orderly manner.

[0073] In addition, the volume of the first air duct section 113 can be set to be larger than the volume of the second air duct section 114, so that the air pressure in the second air duct section 114 can be higher, so that the gas in the second air duct section 114 can be more efficiently input into the refrigeration air duct 130 and the freezing air duct 120.

[0074] In some embodiments, reference Figure 3 As shown, in order to form the first air duct section 113 and the second air duct section 114 in the main air duct 110 of the box 100, a partition 170 may be provided in the main air duct 110 of the box 100, and the partition 170 may separate the main air duct 110 into the first air duct section 113 and the second air duct section 114. A mounting hole 171 may be provided on the partition 170, and the fan 400 may be embedded in the mounting hole 171, so that the fan 400 can be fixed in the main air duct 110 of the box 100 and located between the first air duct section 113 and the second air duct section 114. The air inlet side of the fan 400 faces the first air duct section 113, and the air outlet side of the fan 400 faces the second air duct section 114, so that the gas in the first air duct section 113 can be input into the second air duct section 114 through the fan 400.

[0075] In some embodiments, reference Figure 1 to Figure 2As shown, the axial direction of the fan 400 in the present application can be set to be perpendicular to the flow direction of the gas in the first air duct section 113, and accordingly, the orientation of the mounting hole 171 is perpendicular to the extension direction of the first air duct section 113, so that the mounting hole 171 can be located on the side wall of the first air duct section 113. Specifically, when the first air duct section 113 is extended in the vertical direction, the fan 400 can also be arranged in the main air duct 110 in the vertical direction, so that the horizontal space occupied by the fan 400 in the main air duct 110 can be relatively small, so that the thickness of the main air duct 110 can be set to be relatively thinner, so that the structure of the refrigerator of the present application can be relatively more compact.

[0076] In some embodiments, reference Figure 1 to Figure 2 As shown, in the present application, the first air inlet 121 of the freezing air duct 120 is arranged to face the axial direction of the fan 400. Specifically, the fan 400 and the first air inlet 121 can be respectively located on the inner walls opposite to each other on the second air duct section 114, so that the fan 400 can more easily input the gas in the main air duct 110 into the freezing air duct 120 through the first air inlet 121. The second air inlet 131 of the refrigeration air duct 130 is arranged to intersect with the axial direction of the fan 400, and accordingly, the mounting hole 171 and the second air inlet 131 can be located on different side walls in the second air duct section 114, and the cold gas blown out by the fan 400 will not blow directly to the second air inlet 131, thereby reducing the flow rate of the cold gas entering the refrigeration air duct 130. As a result, the flow rate of cold air from the main air duct 110 to the freezing air duct 120 is larger, and the flow rate of cold air from the main air duct 110 to the refrigeration air duct 130 is relatively smaller, so that the temperature in the freezing air duct 120 is relatively lower, and the temperature in the refrigeration air duct 130 is relatively higher, so as to meet the needs of freezing and refrigerating storage of food.

[0077] In addition, the first air inlet 121 and the mounting hole 171 may be staggered, so that the air outlet side of the fan 400 is prevented from facing directly toward the first air inlet 121, and too much cold air in the main air duct 110 is prevented from entering the freezing air duct 120, which would result in too little cold air entering the refrigeration air duct 130, thereby allowing the freezing air duct 120 and the refrigeration air duct 130 to maintain the required temperature.

[0078] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0079] For the convenience of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A refrigerator, characterized in that: The refrigerator comprises: A box body (100), wherein the box body (100) has a main air duct (110), a freezing air duct (120) and a refrigerating air duct (130), the main air duct (110) has a circulating return air end (111) and a circulating air outlet end (112), one end of the refrigerating air duct (130) is connected to the circulating air outlet end (112), and the other end of the refrigerating air duct (130) is connected to the circulating return air end (111); An evaporator (200) is disposed in the main air duct (110); A heater (300) is disposed in the main air duct (110); One end of the refrigeration air duct (120) is configured to be connected to or disconnected from the circulating air outlet end (112), and the other end of the refrigeration air duct (120) is configured to be connected to or disconnected from the circulating air return end (111).

2. The refrigerator according to claim 1, characterized in that: The refrigerator further comprises a first air door (140) and a second air door (150); the freezing air duct (120) comprises a first air inlet (121) connected to the circulating air outlet end (112); the freezing air duct (120) further comprises a first air outlet (122) connected to the circulating air return end (111); the first air door (140) is movably arranged at the first air inlet (121); and the first air door (140) is configured to open and close the first air inlet (121); The second damper (150) is movably disposed at the first air outlet (122), and the second damper (150) is configured to open and close the first air outlet (122).

3. The refrigerator according to claim 2, characterized in that: The first air door (140) comprises a plurality of first plates (141), the plurality of first plates (141) being rotatably arranged on the first air inlet (121), and the plurality of first plates (141) being arranged along a length or width direction of the first air inlet (121); When the plurality of first plates (141) are rotated to a point where there is a gap between adjacent first plates (141), the first air inlet (121) is connected to the circulating air outlet end (112); when the plurality of first plates (141) are rotated to a point where there is a gap between adjacent first plates (141), the first air inlet (121) is disconnected from the circulating air outlet end (112).

4. The refrigerator according to claim 3, characterized in that: The refrigerator further comprises a third air door (160); the refrigerating air duct (130) comprises a second air inlet (131) connected to the circulating air outlet end (112); the refrigerating air duct (130) further comprises a second air outlet (132) connected to the circulating air return end (111); the third air door (160) is movably arranged at the second air inlet (131); and the third air door (160) is configured to be able to open and close the second air inlet (131).

5. The refrigerator according to claim 4, characterized in that: The refrigerator further comprises a fan (400), wherein the fan (400) is disposed in the main air duct (110), and the fan (400) is configured to drive the gas in the main air duct (110) to flow from the circulating air return end (111) to the circulating air outlet end (112).

6. The refrigerator according to claim 5, characterized in that: The main air duct (110) further comprises a first air duct section (113) and a second air duct section (114) which are connected to each other; the circulating return air end (111) is located on a side of the first air duct section (113) which is away from the second air duct section (114); the circulating air outlet end (112) is located on a side of the second air duct section (114) which is away from the first air duct section (113); the evaporator (200) and the heater (300) are arranged in the first air duct section (113); and the fan (400) is arranged between the first air duct section (113) and the second air duct section (114).

7. The refrigerator according to claim 6, characterized in that: The box body (100) has a partition (170) located between the first air duct section (113) and the second air duct section (114); a mounting hole (171) is provided on the partition (170); and the fan (400) is embedded in the mounting hole (171).

8. The refrigerator according to claim 6 or 7, characterized in that: The axial direction of the fan (400) is perpendicular to the flow direction of the gas in the first air duct section (113).

9. The refrigerator according to claim 8, characterized in that: The orientation of the first air inlet (121) is parallel to the axial direction of the fan (400), and the orientation of the second air inlet (131) is perpendicular to the axial direction of the fan (400).

10. The refrigerator according to claim 9, characterized in that: The fan (400) and the first air inlet (121) are arranged in a staggered manner.

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