Refrigeration air duct system and double-system air-cooled refrigerator

Abstract

The application provides a refrigeration air duct system and a double-system air-cooled refrigerator, comprising a refrigeration evaporator, a refrigeration fan, a refrigeration air duct, a refrigeration evaporator, a refrigeration fan, a freezing air duct, a refrigeration chamber and a variable-temperature air door. The refrigeration evaporator and the refrigeration fan are arranged in the refrigeration air duct, and the refrigeration fan is arranged above the refrigeration evaporator. One end of the refrigeration air duct is provided with a refrigeration air outlet, and the other end is provided with a refrigeration air return port. One end of the freezing air duct is provided with a freezing air outlet, and the other end is communicated with the refrigeration chamber. The refrigeration fan is arranged in the freezing air duct close to the refrigeration chamber, the refrigeration evaporator is arranged in the refrigeration chamber, and the other end of the refrigeration chamber away from the freezing air duct is provided with a freezing air return port. The variable-temperature air door is arranged below the refrigeration fan, so that the variable-temperature air door is communicated with the freezing air duct in the open state. The refrigeration air duct system can reduce the loss of refrigeration air volume, and refrigerate the refrigeration chamber alone to improve the refrigeration effect of each chamber in the refrigerator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of refrigeration, in particular to a refrigeration air duct system and a double-system air-cooled refrigerator. BACKGROUND

[0002] With the development of refrigeration technology, the refrigerator has become an essential household appliance in every family, and the types of refrigerators are becoming more and more diverse. Taking a side-by-side refrigerator as an example, the refrigeration chamber and the freezer chamber of the side-by-side refrigerator are arranged side by side, and the doors of the refrigeration chamber and the freezer chamber are arranged side by side. The side-by-side refrigerator has an intelligent control platform and can run automatically, and can realize the partition storage of articles. However, due to the side-by-side arrangement of the storage area of the side-by-side refrigerator, the horizontal storage space is reduced, resulting in that some large-size articles cannot be stored.

[0003] In order to increase the storage space of the side-by-side refrigerator, a refrigeration compartment is arranged below the side-by-side arranged refrigeration chamber and freezer chamber to form a wide temperature zone variable temperature chamber. In this way, the refrigeration chamber, the refrigeration chamber and the variable temperature chamber need to distribute the cooling capacity generated by the evaporator in the refrigerator through multiple circulating air paths to realize the refrigeration of multiple compartments.

[0004] However, since the return air of each compartment converges in the same evaporator, the air between the compartments is easily mixed together, and the humidity effect of the refrigeration chamber is affected. Moreover, when distributing the cooling capacity of the evaporator through the circulating air path, a large amount of cooling capacity is easily lost, resulting in poor refrigeration effect of each compartment and reducing the refrigeration efficiency of the evaporator. SUMMARY

[0005] The present application provides a refrigeration air duct system and a double-system air-cooled refrigerator to solve the problem of low refrigeration efficiency of the evaporator.

[0006] In a first aspect, the present application provides a refrigeration air duct system, comprising: a first circulating channel and a second circulating channel, wherein:

[0007] The first circulating channel comprises a refrigeration evaporator, a refrigeration fan and a refrigeration air duct; the refrigeration evaporator and the refrigeration fan are arranged in the refrigeration air duct; the refrigeration fan is arranged above the refrigeration evaporator in the vertical direction; one end of the refrigeration air duct is provided with a refrigeration air outlet, and the other end of the refrigeration air duct is provided with a refrigeration air return port;

[0008] The second circulation channel comprises a refrigeration evaporator, a refrigeration fan, a refrigeration air duct, a refrigeration chamber and a variable-temperature air door; one end of the refrigeration air duct is provided with a refrigeration air outlet, and the other end of the refrigeration air duct is in communication with the refrigeration chamber; the refrigeration fan is arranged in the refrigeration air duct; the distance between the refrigeration fan and the refrigeration chamber is less than the distance between the refrigeration fan and the refrigeration air outlet; the refrigeration evaporator is arranged in the refrigeration chamber, and one end of the refrigeration chamber away from the refrigeration air duct is provided with a refrigeration air return port; the variable-temperature air door is arranged below the refrigeration fan in the vertical direction, so that the variable-temperature air door is in communication with the refrigeration air duct in the open state.

[0009] In combination with the first aspect, in an implementable manner, the refrigeration air duct system further comprises a sealing and heat-insulating layer, and the sealing and heat-insulating layer comprises a first sealing and heat-insulating layer and a second sealing and heat-insulating layer; the first sealing and heat-insulating layer is arranged in close contact with the upper surface of the refrigeration evaporator, and the second sealing and heat-insulating layer is arranged in close contact with the lower surface of the refrigeration evaporator.

[0010] In combination with the first aspect, in an implementable manner, the first sealing and heat-insulating layer and the second sealing and heat-insulating layer are made of polyurethane foam material.

[0011] In combination with the first aspect, in an implementable manner, the refrigeration evaporator is arranged in an inclined manner in the horizontal direction; the second sealing and heat-insulating layer has the same inclination angle as the refrigeration evaporator.

[0012] In combination with the first aspect, in an implementable manner, the refrigeration air duct system further comprises a water collecting tray and a drain pipe; the water collecting tray is arranged between the refrigeration evaporator and the second sealing and heat-insulating layer; and the drain pipe is arranged at the bottom of the water collecting tray.

[0013] In combination with the first aspect, in an implementable manner, the second circulation channel further comprises a heater; the heater is arranged between the refrigeration evaporator and the water collecting tray.

[0014] In combination with the first aspect, in an implementable manner, the heater comprises a spiral heating pipe.

[0015] In combination with the first aspect, in an implementable manner, the refrigeration air duct system further comprises a variable-temperature air duct and a variable-temperature air return port; one end of the variable-temperature air duct is in contact with the variable-temperature air door, and the other end of the variable-temperature air duct is provided with a variable-temperature air outlet; when the variable-temperature air door is opened, the variable-temperature air duct is in communication with the refrigeration air duct; and the variable-temperature air return port penetrates through the inner wall of the refrigeration chamber, and the variable-temperature air return port is arranged below the refrigeration evaporator in the vertical direction.

[0016] In a second aspect, the application further provides a double-system air-cooled refrigerator, comprising a refrigeration chamber, a freezing chamber, a variable-temperature chamber, and the refrigeration air duct system of the first aspect, wherein:

[0017] The refrigeration chamber and the freezing chamber are arranged side by side, and the variable-temperature chamber is arranged below the refrigeration chamber and the freezing chamber in the vertical direction;

[0018] The refrigeration evaporator, the refrigeration fan, and the refrigeration air duct are arranged at the back of the refrigeration chamber; the refrigeration air outlet and the refrigeration air return are in communication with the refrigeration chamber;

[0019] The refrigeration interval chamber is arranged below the freezing chamber in the vertical direction, and the freezing air return and the freezing air return are in communication with the freezing chamber; the freezing air duct is arranged at the back of the freezing chamber;

[0020] The variable-temperature air door is arranged between the refrigeration interval chamber and the variable-temperature chamber.

[0021] In an implementable manner in combination with the second aspect, the application further comprises a cabinet; the refrigeration chamber, the freezing chamber, the variable-temperature chamber, and the refrigeration air duct system are arranged in the cabinet, and the cabinet is made according to a foaming process.

[0022] As can be seen from the above technical solutions, the refrigeration air duct system and the double-system air-cooled refrigerator provided by some embodiments of the application comprise a refrigeration evaporator, a refrigeration fan, a refrigeration air duct, a refrigeration evaporator, a refrigeration fan, a freezing air duct, a refrigeration interval chamber, and a variable-temperature air door. The refrigeration evaporator and the refrigeration fan are arranged in the refrigeration air duct, and the refrigeration fan is arranged above the refrigeration evaporator. One end of the refrigeration air duct is provided with a refrigeration air outlet, and the other end is provided with a refrigeration air return. One end of the freezing air duct is provided with a freezing air outlet, and the other end is in communication with the refrigeration interval chamber. The refrigeration fan is arranged in the freezing air duct close to the refrigeration interval chamber, the refrigeration evaporator is arranged in the refrigeration interval chamber, and one end of the refrigeration interval chamber away from the freezing air duct is provided with a freezing air return. The variable-temperature air door is arranged below the refrigeration fan, so that the variable-temperature air door is in communication with the freezing air duct in the open state. The refrigeration air duct system can reduce the loss of refrigeration air volume, and simultaneously refrigerate the refrigeration chamber, so as to improve the refrigeration effect of each chamber in the refrigerator. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can also be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0024] Figure 1The internal structure of the double-system air-cooled refrigerator according to some embodiments of the present application is shown in the cross-sectional view;

[0025] Figure 2 The side cross-sectional view of the refrigeration chamber according to some embodiments of the present application is shown in the cross-sectional view;

[0026] Figure 3 The side cross-sectional view of the refrigeration chamber according to some embodiments of the present application is shown in the cross-sectional view;

[0027] Figure 4 The side cross-sectional view of the refrigeration chamber according to some embodiments of the present application is shown in the cross-sectional view;

[0028] Figure 5 The structure of the heater according to some embodiments of the present application is shown in the schematic view.

[0029] Illustration:

[0030] wherein 1 is the refrigeration chamber, 101 is the refrigeration evaporator, 102 is the refrigeration fan, 103 is the refrigeration air duct, 104 is the refrigeration air outlet, 105 is the refrigeration air return, 2 is the refrigeration chamber, 201 is the refrigeration evaporator, 202 is the refrigeration fan, 203 is the refrigeration air duct, 204 is the refrigeration air outlet, 205 is the refrigeration air return, 206 is the first sealing insulation layer, 207 is the second sealing insulation layer, 208 is the heater, 209 is the water pan, 3 is the temperature-variable chamber, 301 is the temperature-variable air duct, 302 is the temperature-variable air outlet, 303 is the temperature-variable air door, 304 is the temperature-variable air return, and 4 is the drain pipe. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical solutions and advantages of the example embodiments of the present application clearer, the technical solutions in the example embodiments of the present application will be described clearly and completely below with reference to the drawings in the example embodiments of the present application. Obviously, the described example embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application.

[0032] The American refrigerator is a new type of refrigerator. The upper part of the American refrigerator is a cold room and a refrigeration room in a split layout, and the lower part is a wide temperature-variable room. The American refrigerator can make up for the defect of narrow storage width of the split-door refrigerator and increase the storage space of the refrigerator through the layout structure of the refrigeration room, the refrigeration room and the temperature-variable room. In order to meet the refrigeration requirements of multiple chambers, the refrigeration room, the refrigeration room and the temperature-variable room of the American refrigerator need to distribute the cold quantity generated by the evaporator during operation through multiple circulating air paths to achieve the refrigeration of multiple chambers.

[0033] However, when distributing the cooling capacity generated by the evaporator, the return air from each compartment converges within the same evaporator space, allowing air to circulate between compartments. This leads to odors mixing between multiple compartments and affects the cooling efficiency of each compartment, as well as the humidity control of the refrigerator compartment. Furthermore, having multiple compartments increases the airflow path between the freezer and variable temperature compartments, increasing airflow loss and reducing the evaporator's cooling efficiency. In addition, the temperature difference between the freezer and refrigerator compartments reduces the uniformity of evaporator cooling, negatively impacting the user experience.

[0034] Based on the above application scenarios, in order to improve the problem of low evaporator cooling efficiency, some embodiments of this application provide a cooling air duct system, including a first circulation channel and a second circulation channel.

[0035] Among them, such as Figure 1 As shown, the first circulation channel includes a refrigerated evaporator 101, a refrigerated fan 102, and a refrigerated air duct 103. The refrigerated evaporator 101 and the refrigerated fan 102 are disposed within the refrigerated air duct 103, with the refrigerated fan 102 positioned vertically above the refrigerated evaporator 101. The refrigerated evaporator 101 is used to cool the refrigerator compartment 1. After the refrigerated fan 102 starts operating, it rotates to accelerate airflow, transporting the cooling capacity generated by the refrigerated evaporator 101 through the refrigerated air duct 103 to the refrigerator compartment 1, thus forming a circulating air path for the refrigerator compartment 1.

[0036] like Figure 2 As shown, a refrigerated air outlet 104 is provided at one end of the refrigerated air duct 103, and a refrigerated air return outlet 105 is provided at the other end of the refrigerated air duct 103. The cooling capacity generated by the refrigerated evaporator 101 can circulate between the refrigerated compartment 1 and the refrigerated air duct 103 through the refrigerated air outlet 104 and the refrigerated air return outlet 105 to achieve cooling of the refrigerated compartment 1.

[0037] like Figure 3As shown, the second circulation channel includes a refrigeration evaporator 201, a refrigeration fan 202, a refrigeration duct 203, a refrigeration compartment, and a variable temperature damper 303. One end of the refrigeration duct 203 has a refrigeration air outlet 204, and the other end connects to the refrigeration compartment. The refrigeration fan 202 is located within the refrigeration duct 203 to accelerate airflow within the refrigeration duct during operation. The distance between the refrigeration fan 202 and the refrigeration compartment is less than the distance between the refrigeration fan 202 and the refrigeration air outlet 204, meaning the refrigeration fan 202 is positioned close to the refrigeration evaporator 201. The refrigeration evaporator 201 is located within the refrigeration compartment, and the end of the refrigeration compartment furthest from the refrigeration duct 203 has a refrigeration return air outlet 205. In other words, the refrigeration compartment houses the refrigeration evaporator 201, and the refrigeration compartment is connected to the refrigeration duct 203 and the refrigeration compartment via the refrigeration air outlet 204 and the refrigeration return air outlet 205, respectively, to form the circulation path of the refrigeration compartment 2.

[0038] To isolate the freezer compartment 2 from the evaporator 201, in some embodiments, the refrigeration duct system further includes a sealing insulation layer. For example... Figure 4 As shown, the sealing and insulation layer includes a first sealing and insulation layer 206 and a second sealing and insulation layer 207; the first sealing and insulation layer 206 is attached to the upper surface of the refrigeration evaporator 201, and the second sealing and insulation layer 207 is attached to the lower surface of the refrigeration evaporator 201.

[0039] To ensure the thermal insulation effect of the sealing insulation layer, in some embodiments, the first sealing insulation layer 206 and the second sealing insulation layer 207 are made of polyurethane foam. It is understood that the sealing insulation layer in this embodiment may also be made of other materials with poor thermal conductivity to block the exchange of cold energy between the freezer compartment and the evaporator.

[0040] Furthermore, since the evaporator 201 defrosts during the refrigeration process, in order to ensure the timely drainage of the defrosting water generated by the evaporator 201, in some embodiments, the evaporator 201 is inclined in the horizontal direction, and the second sealing insulation layer 207 has the same inclination angle as the evaporator 201. By placing the evaporator 201 with a higher front end and a lower rear end, it is ensured that the defrosting water can be drained in a timely manner.

[0041] To minimize the space occupied by the tilted evaporator 201 while ensuring timely drainage of defrost water, in some embodiments, the tilt angle of the evaporator 201 relative to the horizontal direction is between 0° and 20°, meaning the angle between the evaporator 201 and the horizontal direction is greater than 0° and less than 20°. By setting the evaporator 201 within this angle range, defrost water can flow out smoothly while minimizing its internal space occupation within the refrigerator.

[0042] After the evaporator 201 discharges defrost water, in order to ensure the cooling effect of the refrigeration duct system, the defrost water also needs to be drained from the refrigerator. Therefore, in some embodiments, the refrigeration duct system also includes a drip tray 209 and a drain pipe 4. The drip tray 209 is located between the evaporator 201 and the second sealing insulation layer 207, and the drain pipe 4 is located at the bottom of the drip tray 209. In this way, the drip tray 209 can promptly collect the defrost water discharged from the evaporator 201, and the drain pipe 4 then drains the defrost water collected by the drip tray 209 to the outside of the refrigerator.

[0043] To achieve defrosting of the evaporator 201, in some embodiments, the second circulation channel further includes a heater 208, which is disposed between the evaporator 201 and the drip tray 209. Thus, when the evaporator 201 reaches the defrosting conditions, the heater 208 can be activated to increase the surface temperature of the evaporator 201, thereby defrosting the evaporator 201.

[0044] like Figure 5 As shown, in some embodiments, heater 208 includes a spiral heating tube to achieve uniform heating of refrigeration evaporator 201.

[0045] To achieve cooling of the variable temperature chamber 3, the cooling duct system is also equipped with a variable temperature damper 303 to distribute the cooling capacity generated by the evaporator 201 to the variable temperature chamber 3. Therefore, the variable temperature damper 303 is located below the refrigeration fan 202 in the vertical direction so that the variable temperature damper 303 connects to the refrigeration duct 203 when it is open.

[0046] In some embodiments, the refrigeration duct system further includes a variable temperature duct 301 and a variable temperature return air inlet 304. One end of the variable temperature duct 301 is in close contact with a variable temperature damper 303, and the other end of the variable temperature duct 301 is provided with a variable temperature air outlet 302. When the variable temperature damper 303 is open, the variable temperature duct 301 is connected to the refrigeration duct 203, at which time the variable temperature duct can receive the cooling capacity generated by the refrigeration chamber. The variable temperature return air inlet 304 penetrates the inner wall of the refrigeration chamber and is located below the refrigeration evaporator 201 to form a circulating air path for the variable temperature chamber 3.

[0047] Based on the aforementioned refrigeration duct system, some embodiments of this application also provide a dual-system air-cooled refrigerator, including a refrigerator compartment 1, a freezer compartment 2, a variable temperature compartment 3, and the aforementioned refrigeration duct system. Wherein: [Example 1] Figure 1 As shown, the refrigerator compartment 1 and the freezer compartment 2 are arranged side by side, and the variable temperature compartment 3 is located below the refrigerator compartment 1 and the freezer compartment 2. The refrigerator evaporator 101, the refrigerator fan 102, and the refrigerator air duct 103 are located at the back of the refrigerator compartment 1. The refrigerator air outlet 104 and the refrigerator air return vent 105 are connected to the refrigerator compartment 1.

[0048] In other words, as can be seen from the above embodiments, the refrigeration evaporator 101 is vertically installed at the back of the refrigerator compartment 1, and the refrigeration fan 102 is installed inside the refrigeration air duct 103, above the refrigeration evaporator 101. The refrigeration air duct 103 has a refrigeration air outlet 104 and a refrigeration return air duct 105, which can form a circulating air path for the refrigerator compartment 1, achieving independent cooling for the refrigerator compartment 1. Furthermore, the refrigeration air outlet 104 is located at the back of the refrigerator compartment 1 to ensure the temperature uniformity of the middle compartment of the refrigerator compartment 1. Through the above structure, the refrigerator compartment 1 can have independence, improving the humidification effect and temperature uniformity of the refrigerator compartment 1.

[0049] The refrigeration compartment is located below the freezer compartment 1. The refrigeration return air vent 205 is connected to the freezer compartment 1, and the refrigeration air duct 203 is located at the rear of the freezer compartment 1. A variable temperature damper 303 is located between the refrigeration compartment and the variable temperature compartment 3. By placing the refrigeration air outlet 204 at the rear of the freezer compartment 2, temperature uniformity in the middle compartment of the freezer compartment 2 can be achieved. Furthermore, by installing the refrigeration evaporator 201 and the refrigeration fan 202 below the freezer compartment 1, the distance between the refrigeration fan 202 and the variable temperature compartment 3 is shortened, meeting the high airflow requirements of the variable temperature compartment 3, thus enabling the variable temperature compartment 3 to function as a freezer compartment.

[0050] In some embodiments, the dual-system air-cooled refrigerator further includes a cabinet. The refrigerator compartment 1, the freezer compartment 2, the variable temperature compartment 3, and the refrigeration air duct system are all disposed within the cabinet, and the cabinet is manufactured using a foaming process.

[0051] See Figures 1-5 The following example illustrates the dual-system air-cooled refrigerator provided in the application embodiment:

[0052] The upper part of the dual-system air-cooled refrigerator has a refrigerator compartment 1 and a freezer compartment 2 with a side-by-side layout. The refrigerator compartment 1 is located on the right side of the dual-system air-cooled refrigerator, and the freezer compartment 2 is located on the left side of the dual-system air-cooled refrigerator. The lower part of the dual-system air-cooled refrigerator has a variable temperature compartment 3.

[0053] The refrigeration evaporator 101 is vertically mounted at the rear of the refrigerator compartment 1. The refrigeration fan 102 is installed inside the refrigeration air duct 103, positioned above the refrigeration evaporator 101. The refrigeration air duct 103 has a refrigeration air outlet 104 and a refrigeration return air duct 105, forming a circulating air path for the refrigerator compartment 1 to achieve cooling. The refrigeration air outlet 104 is located at the rear of the refrigerator compartment 1 to ensure temperature uniformity.

[0054] Similarly, freezer compartment 2 is equipped with a refrigeration evaporator 201, a refrigeration fan 202, and a refrigeration air duct 203. The refrigeration air duct 203 is located at the back of freezer compartment 2 and has a refrigeration air outlet 204. Positioning the refrigeration air outlet 204 at the back of freezer compartment 2 ensures temperature uniformity. The refrigeration evaporator 201 is horizontally positioned at the bottom of freezer compartment 2, and is fixed with its front end higher than its rear end, at a 15° angle to the horizontal to ensure smooth drainage of defrost water.

[0055] A refrigeration return air vent 205 is located above the front end of the refrigeration evaporator 201. The refrigeration return air vent 205 is used to allow hot air from the freezer compartment 2 to circulate through the refrigeration compartment for cooling. To accelerate airflow, a refrigeration fan 202 is located at the rear end of the refrigeration evaporator 201, positioned at the back of the freezer compartment 2. A refrigeration air duct 203 is located above the refrigeration fan 202, forming the outlet channel for cold air from the freezer compartment 2.

[0056] A first sealing and insulation layer 206 is provided above the evaporator 201 to isolate the cold energy exchange between the freezer compartment 2 and the evaporator 201. A second sealing and insulation layer 207 is provided below the evaporator 201, and the inclination angle of the second sealing and insulation layer 207 is consistent with the inclination angle of the evaporator 201. The second sealing and insulation layer 207 can be a separate component or a protrusion in the interlayer between the freezer compartment 2 and the variable temperature compartment 3.

[0057] A drip tray 209 is provided between the evaporator 201 and the second sealing insulation layer 207 for collecting and draining water. A heater 208 is also provided between the evaporator 201 and the drip tray 209 to remove frost from the evaporator 201 and its surroundings. A drain pipe 4 is located at the bottom of the drip tray 209, passing through the foam layer of the refrigerator body and positioned inside the drip tray 5. Thus, the defrost water collected in the drip tray 209 can flow into the container of the drip tray 5 through the drain pipe 4 for timely drainage.

[0058] A temperature-controlled damper 303 is located below the refrigeration fan 202 to supply air to the variable temperature compartment 3 by opening and closing the damper 3. The temperature-controlled damper 303 is positioned within the space between the freezer compartment 2 and the variable temperature compartment 3. A temperature-controlled air duct 301 is located at the back of the variable temperature compartment 3, and it contacts the temperature-controlled damper 303 to connect with the freezer air duct 203 when the damper 303 is open. The temperature-controlled air duct 301 has a temperature-controlled air outlet 302 to form the air supply channel for the variable temperature compartment 3. A temperature-controlled return air inlet 304 is located below the front end of the refrigeration evaporator 201. The temperature-controlled return air inlet 304 penetrates the space between the freezer compartment 2 and the variable temperature compartment 3 to form the return air channel for the variable temperature compartment 3.

[0059] As can be seen from the above technical solutions, the refrigeration duct system and dual-system air-cooled refrigerator provided in some embodiments of this application include a refrigeration evaporator 101, a refrigeration fan 102, a refrigeration duct 103, a refrigeration evaporator 201, a refrigeration fan 202, a freezer duct 203, a refrigeration compartment, and a variable temperature damper 303. The refrigeration evaporator 101 and the refrigeration fan 102 are disposed within the refrigeration duct 103, with the refrigeration fan 102 positioned above the refrigeration evaporator 101. One end of the refrigeration duct 103 has a refrigeration air outlet 104, and the other end has a refrigeration air return vent 105. One end of the freezer duct 203 has a freezer air outlet 204, and the other end communicates with the refrigeration compartment. The refrigeration fan 202 is disposed within the freezer duct 203 near the refrigeration compartment, and the refrigeration evaporator 201 is disposed within the refrigeration compartment, with a freezer air return vent 205 located at the end of the refrigeration compartment away from the freezer duct 203. The variable temperature damper 303 is located below the refrigeration fan 202 so that when the variable temperature damper 303 is open, it connects to the freezer air duct 203. The refrigeration air duct system can reduce the loss of refrigeration air volume, while separately cooling the refrigerator compartment, thereby improving the cooling effect of each compartment in the refrigerator.

[0060] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

[0061] For ease of explanation, the above description has been provided in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or to limit the embodiments to the specific forms disclosed above. Various modifications and variations can be obtained based on the above teachings. The selection and description of the above embodiments are for the purpose of better explaining the principles and practical applications, thereby enabling those skilled in the art to better utilize the described embodiments and various different variations of embodiments suitable for specific use considerations.

Claims

1. A dual-system air-cooled refrigerator, characterized in that, The system includes a refrigeration duct system, a refrigerator compartment (1), a freezer compartment (2), and a variable temperature compartment (3). The refrigeration duct system includes a first circulation channel and a second circulation channel, wherein: The first circulation channel includes a refrigerated evaporator (101), a refrigerated fan (102), and a refrigerated air duct (103); the refrigerated evaporator (101) and the refrigerated fan (102) are disposed in the refrigerated air duct (103); the refrigerated fan (102) is disposed above the refrigerated evaporator (101) in the vertical direction; one end of the refrigerated air duct (103) is provided with a refrigerated air outlet (104), and the other end of the refrigerated air duct (103) is provided with a refrigerated air return outlet (105); The second circulation channel includes a refrigeration evaporator (201), a refrigeration fan (202), a refrigeration duct (203), a refrigeration chamber, and a variable temperature damper (303); one end of the refrigeration duct (203) is provided with a refrigeration air outlet (204), and the other end of the refrigeration duct (203) is connected to the refrigeration chamber; the refrigeration fan (202) is located inside the refrigeration duct (203); the distance between the refrigeration fan (202) and the refrigeration chamber is less than the distance between the refrigeration fan (202) and the refrigeration air outlet (204); the refrigeration evaporator (201) is located inside the refrigeration chamber, and the end of the refrigeration chamber away from the refrigeration duct (203) is provided with a refrigeration return air outlet (205); the variable temperature damper (303) is located below the refrigeration fan (202) in the vertical direction, so that the variable temperature damper (303) is connected to the refrigeration duct (203) when it is open. The refrigerator compartment (1) and the freezer compartment (2) are arranged side by side, and the variable temperature compartment (3) is located below the refrigerator compartment (1) and the freezer compartment (2) in the vertical direction; The refrigeration evaporator (101), refrigeration fan (102) and refrigeration air duct (103) are located at the back of the refrigeration chamber (1); the refrigeration air outlet (104) and the refrigeration air return outlet (105) are connected to the refrigeration chamber (1); The refrigeration chamber is located vertically below the freezer chamber (2), and the freezer return air inlet (205) is connected to the freezer chamber (2); the freezer air duct (203) is located at the back of the freezer chamber (2); The variable temperature damper (303) is located between the refrigeration room and the variable temperature room (3).

2. The dual-system air-cooled refrigerator according to claim 1, characterized in that, The refrigeration duct system further includes a sealing and insulation layer, which includes a first sealing and insulation layer (206) and a second sealing and insulation layer (207). The first sealing and insulation layer (206) is attached to the upper surface of the refrigeration evaporator (201), and the second sealing and insulation layer (207) is attached to the lower surface of the refrigeration evaporator (201).

3. The dual-system air-cooled refrigerator according to claim 2, characterized in that, The first sealing and insulation layer (206) and the second sealing and insulation layer (207) are made of polyurethane foam.

4. The dual-system air-cooled refrigerator according to claim 2, characterized in that, The refrigeration evaporator (201) is inclined in the horizontal direction; the second sealing and heat insulation layer (207) has the same inclination angle as the refrigeration evaporator (201).

5. The dual-system air-cooled refrigerator according to claim 2, characterized in that, The refrigeration duct system also includes a water receiving tray (209) and a drain pipe (4); the water receiving tray (209) is disposed between the refrigeration evaporator (201) and the second sealing insulation layer (207); the drain pipe (4) is disposed at the bottom of the water receiving tray (209).

6. The dual-system air-cooled refrigerator according to claim 5, characterized in that, The second circulation channel also includes a heater (208); the heater (208) is disposed between the refrigeration evaporator (201) and the water receiving tray (209).

7. The dual-system air-cooled refrigerator according to claim 6, characterized in that, The heater (208) includes a spiral heating tube.

8. The dual-system air-cooled refrigerator according to claim 1, characterized in that, The refrigeration duct system also includes a variable temperature duct (301) and a variable temperature return air inlet (304); one end of the variable temperature duct (301) is in contact with the variable temperature damper (303), and the other end of the variable temperature duct (301) is provided with a variable temperature air outlet (302); when the variable temperature damper (303) is open, the variable temperature duct (301) is connected to the refrigeration duct (203); the variable temperature return air inlet (304) penetrates the inner wall of the refrigeration chamber, and the variable temperature return air inlet (304) is located below the refrigeration evaporator (201) in the vertical direction.

9. The dual-system air-cooled refrigerator according to any one of claims 1-8, characterized in that, It also includes a cabinet; the refrigerator compartment (1), the freezer compartment (2), the variable temperature compartment (3) and the refrigeration duct system are installed in the cabinet, and the cabinet is made according to the foaming process.

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