Axial flow fan and single system refrigerator

Abstract

The utility model relates to the technical field of refrigerator provides a kind of axial flow fan, including air duct, with air inlet end and air outlet end;The central position of air duct is equipped with main shaft;Air duct is also equipped with N spiral-shaped blades of same rotation direction around main shaft;The upper surface of each blade and the lower surface of adjacent blade form a gas flow channel, and N gas flow channels are formed in air duct;Air inlet end is also equipped with motor for driving main shaft rotation. Therefore, the utility model forms multiple independent gas flow channels in air duct by multiple spiral blades;When main shaft rotates, multiple blades rotate simultaneously, gas is sucked from air inlet end and sent from air outlet end;Each gas flow channel independently transports a gas flow. Compared with the same specification existing axial flow, the utility model improves the compression ratio and airflow velocity of fan;And reduce the turbulence degree of airflow, reduce noise, improve air volume.The utility model also provides a single-system refrigerator.

Description

Technical Field

[0001] This utility model belongs to the field of refrigerator technology, and in particular relates to an axial flow fan and a single-system refrigerator. Background Technology

[0002] Single-system refrigerators generate cooling capacity through a single evaporator, supplying cooling to two compartments, which simplifies the refrigerator's structure. This structure requires a relatively powerful fan for air circulation. However, existing axial fans have low compression ratios and insufficient airflow. Centrifugal fans, with their peripheral airflow design, make airflow distribution difficult. If each compartment uses its own fan, it increases the thickness of the air ducts, encroaching on the effective volume of the storage compartments.

[0003] In conclusion, the existing technology obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0004] To address the aforementioned shortcomings, this utility model primarily provides an axial flow fan that solves the technical problems of low air pressure and small air volume in existing axial flow fans.

[0005] To solve the above problems, this utility model provides an axial flow fan, including a duct that is open at both ends, with one end being the air inlet and the other end being the air outlet; The air duct is provided with a main shaft at its center; the air duct is also provided with N spiral blades arranged around the main shaft from the air inlet to the air outlet, with the same direction of rotation; when projected vertically from the air inlet or air outlet, the beginning or end of each blade is evenly arranged around the main shaft. The inner spiral edge of the blade is fixed to the main shaft, and the outer spiral edge extends to a position close to the inner wall of the air duct; an airflow channel is formed between the upper surface of each blade and the lower surface of the adjacent blade, and N airflow channels are formed inside the air duct; the air inlet end is also provided with a motor for driving the main shaft to rotate.

[0006] According to the axial flow fan of this utility model, the number of blades in the air duct is three or four.

[0007] According to the axial flow fan of this utility model, the diameter of the air inlet end of the air duct is smaller than the diameter of the air outlet end.

[0008] According to the axial flow fan of this utility model, the side of the air duct is a hyperboloid shape.

[0009] A single-system refrigerator, comprising: The refrigerator liner has a refrigerator compartment, and a refrigerator air duct panel is provided in the refrigerator compartment near its back side; a refrigerator air duct is opened in the refrigerator air duct panel; and a refrigerator air outlet connecting the refrigerator compartment and the refrigerator air duct is also provided on the refrigerator air duct panel. The refrigeration liner has a refrigeration compartment, which contains a cooling chamber located near its back side; the cooling chamber contains an evaporator; and the refrigeration compartment also contains a refrigeration air outlet. The refrigerated return air duct has one end connected to the refrigerated return air vent located in the refrigerated room, and the other end connected to the refrigeration chamber. The air distribution box has a fan chamber inside for installing the axial flow fan. The air distribution box is also equipped with: An air intake duct connecting the fan chamber and the cooling chamber; A refrigeration air distribution duct that connects the fan chamber and the refrigeration air duct; A refrigeration air distribution duct that connects the fan chamber and the refrigeration air outlet.

[0010] According to the single-system refrigerator of this utility model, the air distribution box is disposed between the refrigeration inner liner and the freezing inner liner.

[0011] According to the single-system refrigerator of this utility model, the freezing air outlet is located at the top of the freezing compartment.

[0012] According to the single-system refrigerator of this utility model, an air damper is provided at the connection position between the refrigeration air duct and the refrigeration branch air duct.

[0013] According to the single-system refrigerator of this utility model, the air distribution box is made of foam material.

[0014] According to the single-system refrigerator of this utility model, the exterior of the air distribution box is provided with an insulation plate.

[0015] In summary, the axial flow fan of this invention forms multiple independent airflow channels within the fan duct through multiple spiral blades. When the main shaft rotates, multiple blades rotate simultaneously, drawing gas in from the inlet and expelling it from the outlet. Each airflow channel independently delivers a stream of air. Compared to existing axial flow fans of the same specifications, this invention improves the fan's compression ratio and airflow velocity, reduces airflow turbulence, lowers noise, and increases air volume. This invention also provides a single-system refrigerator, utilizing the strong air supply capacity of the axial flow fan to supply air to both the refrigerator and freezer compartments. Through a single refrigeration system, one axial flow fan supplies cooling to both compartments, simplifying the refrigerator's structure and increasing its effective volume. Attached Figure Description

[0016] Figure 1 This is a structural schematic diagram of the axial flow fan of this utility model; Figure 2 This is a schematic diagram of the internal structure of the axial flow fan of this utility model; Figure 3 This is a structural schematic diagram of the single-system refrigerator of this utility model; Figure 4 yes Figure 1 Schematic diagram of the structure in direction A; Figure 5 yes Figure 4 Schematic diagram of the cross-sectional structure along the B direction; Figure 6 yes Figure 5 A schematic diagram of the structure of a local area in the middle; In the diagram: 1-Air duct, 11-Main shaft, 12-Blade, 13-Air inlet, 14-Air outlet, 15-Airflow channel; 2-Refrigerator inner liner, 21-Refrigerator compartment, 22-Refrigerator return air vent, 23-Refrigerator supply air vent, 24-Refrigerator return air duct, 25-Refrigerator air duct plate, 251-Refrigerator air duct; 3-Freezer inner liner, 31-Freezer compartment, 32-Refrigeration chamber, 33-Evaporator, 34-Freezer supply air vent; 4-Air distribution box, 41-Suction duct, 42-Refrigerator air distribution duct, 43-Freezer air distribution duct. Detailed Implementation

[0017] See Figure 1 This utility model provides an axial flow fan, including a duct 1 that is open at both ends, one end of which is an air inlet 13 and the other end is an air outlet 14. See Figure 2 The air duct 1 has a main shaft 11 at its center; the air duct 1 also has N spiral blades 12 arranged around the main shaft 11 and rotating in the same direction from the air inlet end 13 to the air outlet end 14; when projected vertically from the air inlet end 13 or the air outlet end 14, the beginning or end of each blade 12 is evenly arranged around the main shaft 11. The inner spiral edge of the blade 12 is fixed to the main shaft 11, and the outer spiral edge extends to a position close to the inner wall of the air duct 1; an airflow channel 15 is formed between the upper surface of each blade 12 and the lower surface of the adjacent blade 12, and N airflow channels 15 are formed inside the air duct 1; the air inlet end 13 is also provided with a motor for driving the main shaft 11 to rotate. Preferably, the number of blades 12 inside the air duct 1 is three or four.

[0018] The axial flow fan of this invention has multiple helical blades, forming multiple independent airflow channels 15 in the fan casing 1. When the main shaft 11 rotates, multiple blades 12 rotate simultaneously, and gas is drawn in from the inlet end 13 and sent out from the outlet end 14. Each airflow channel 15 independently delivers a stream of air. Compared with existing axial flow fans of the same specifications, this invention improves the fan's compression ratio and airflow velocity; it also reduces airflow turbulence, lowers noise, and increases air volume.

[0019] As one embodiment, the diameter of the air inlet end 13 of the air duct 1 is smaller than the diameter of the air outlet end 14; this reduces the airflow resistance at the air outlet end 14.

[0020] Furthermore, the side surface of the air duct 1 is hyperboloidal, which helps to evenly distribute airflow, reduce flow resistance, and increase the compression ratio. The hyperboloidal air duct design allows the airflow to maintain greater stability as it passes through, thereby achieving a larger air volume output.

[0021] See Figure 3 and 4 This utility model also provides a single-system refrigerator, comprising: The refrigerator inner liner 2 has a refrigerator compartment 21, and the refrigerator compartment 21 is provided with a refrigerator air duct plate 25 near its back side; combined with Figure 5 The refrigerated air duct plate 25 is provided with a refrigerated air duct 251; the refrigerated air duct plate 25 is also provided with a refrigerated air outlet 23 that connects the refrigerated compartment 21 and the refrigerated air duct 251. The freezing inner liner 3 has a freezing compartment 31, and a refrigeration chamber 32 is provided in the freezing compartment 31 near its back side; an evaporator 33 is provided in the refrigeration chamber 32; and a freezing air outlet 34 is also provided in the freezing compartment 31. The refrigerated return air duct 24 has one end connected to the refrigerated return air vent 22 located in the refrigerated compartment 21, and the other end connected to the refrigeration chamber 32; See Figure 6 The air distribution box 4 has a fan chamber inside for installing the axial flow fan. The air distribution box 4 is also equipped with: The air intake duct 41 connects the fan chamber and the cooling chamber 32; A cold storage air duct 42 connecting the fan chamber and the cold storage air duct 251; A refrigeration air distribution duct 43 connecting the fan chamber and the refrigeration air outlet 34; The air inlet 13 of the axial fan faces the air intake duct 41 and is connected to the refrigeration chamber 32 through the air distribution box 4. Taking advantage of the strong air supply capacity of the axial fan of this invention, air is delivered to the refrigerator compartment 21 and the freezer compartment 31 respectively. Through one refrigeration system, one axial fan supplies cooling to two compartments, simplifying the structure of the refrigerator and increasing the effective volume.

[0022] As a preferred embodiment, the air distribution box 4 is located between the refrigerated inner liner 2 and the frozen inner liner 3; making full use of the space between the two inner liners to increase the volume of the storage compartment.

[0023] Furthermore, the refrigeration air outlet 34 is located at the top of the refrigeration chamber 31; the cold airflow naturally descends within the refrigeration chamber 31, which is beneficial for uniform temperature within the chamber.

[0024] As one embodiment, a damper is provided at the connection position between the refrigerated air duct 251 and the refrigerated branch air duct 42, and the temperature inside the refrigerated compartment 21 is regulated by the damper.

[0025] As one embodiment, the air distribution box 4 is made of foam material, which has good thermal insulation properties and reduces cold leakage. Furthermore, the exterior of the air distribution box 4 is equipped with an insulation board to improve thermal insulation performance.

[0026] In summary, this invention provides an axial flow fan that forms multiple independent airflow channels within the fan duct using multiple spiral blades. When the main shaft rotates, all blades rotate simultaneously, drawing gas in from the inlet and expelling it from the outlet. Each airflow channel independently delivers a stream of air. Compared to existing axial flow fans of the same specifications, this invention improves the fan's compression ratio and airflow velocity, reduces airflow turbulence, lowers noise, and increases air volume. This invention also provides a single-system refrigerator that utilizes the strong air supply capacity of its axial flow fan to supply air to both the refrigerator and freezer compartments. Through a single refrigeration system and one axial flow fan, cooling is supplied to both compartments, simplifying the refrigerator's structure and increasing its effective volume.

[0027] Of course, there may be other embodiments of this utility model. Without departing from the spirit and essence of this utility model, those skilled in the art can make various corresponding changes and modifications based on this utility model, but these corresponding changes and modifications should all fall within the protection scope of the appended claims of this utility model.

Claims

1. An axial flow fan, characterized in that, It includes a ventilation duct that is open at both ends, with one end being the air inlet and the other end being the air outlet; The air duct is provided with a main shaft at its center; the air duct is also provided with N spiral blades arranged around the main shaft from the air inlet to the air outlet, with the same direction of rotation; when projected vertically from the air inlet or air outlet, the beginning or end of each blade is evenly arranged around the main shaft. The inner spiral edge of the blade is fixed to the main shaft, and the outer spiral edge extends to a position close to the inner wall of the air duct; an airflow channel is formed between the upper surface of each blade and the lower surface of the adjacent blade, and N airflow channels are formed inside the air duct; the air inlet end is also provided with a motor for driving the main shaft to rotate.

2. The axial flow fan as described in claim 1, characterized in that, The number of blades inside the air duct is three or four.

3. The axial flow fan as described in claim 1, characterized in that, The diameter of the air inlet end of the air duct is smaller than the diameter of the air outlet end.

4. The axial flow fan as described in claim 3, characterized in that, The side of the air duct is a hyperboloid shape.

5. A single-system refrigerator, characterized in that, include: The refrigerator liner has a refrigerator compartment, and a refrigerator air duct panel is provided in the refrigerator compartment near its back side; a refrigerator air duct is opened in the refrigerator air duct panel; and a refrigerator air outlet connecting the refrigerator compartment and the refrigerator air duct is also provided on the refrigerator air duct panel. The refrigeration liner has a refrigeration compartment, and the refrigeration compartment has a cooling chamber located near its back side; the cooling chamber has an evaporator; the refrigeration compartment also has a refrigeration air outlet; The refrigerated return air duct has one end connected to the refrigerated return air vent located in the refrigerated room, and the other end connected to the refrigeration chamber. The air distribution box has a fan chamber inside for installing the axial flow fan as described in any one of claims 1 to 4; The air distribution box is also equipped with: An air intake duct connecting the fan chamber and the cooling chamber; A refrigeration air distribution duct that connects the fan chamber and the refrigeration air duct; A refrigeration air distribution duct that connects the fan chamber and the refrigeration air outlet.

6. The single-system refrigerator as described in claim 5, characterized in that, The air distribution box is located between the refrigerated inner liner and the frozen inner liner.

7. The single-system refrigerator as described in claim 6, characterized in that, The refrigeration air outlet is located at the top of the refrigeration compartment.

8. The single-system refrigerator as described in claim 5, characterized in that, The connection point between the refrigerated air duct and the refrigerated branch air duct is equipped with an air damper.

9. The single-system refrigerator as described in claim 5, characterized in that, The air distribution box is made of foam material.

10. The single-system refrigerator as described in claim 5, characterized in that, The exterior of the air distribution box is equipped with an insulation panel.

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