refrigerator

Abstract

The present invention discloses a refrigerator comprising: a water tank for receiving and collecting defrost water; a heat exchanger disposed within the water tank; and a centrifugal fan disposed above the heat exchanger, the heat exchanger being located at the air inlet of the centrifugal fan. The refrigerator of the present invention effectively solves the problem of poor heat dissipation in existing built-in refrigerators.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigerators, and in particular to a refrigerator. Background Art

[0002] With the advent of the trend of home integration, built-in refrigerators are becoming increasingly popular. Refrigerators placed in cabinets or specially designed decorative cabinets have become a new product. Built-in refrigerators refer to refrigerators that can be embedded in cabinets, integrating with the cabinets to enhance the overall sense of integration.

[0003] Compared to traditional refrigerators, built-in refrigerators offer the following advantages: Aesthetics: Because they're embedded within cabinets, they don't protrude, enhancing the overall aesthetics of the kitchen. Space-saving: Built-in refrigerators are typically thinner than traditional refrigerators, making better use of kitchen space while minimizing floor space usage. Convenience: Built-in refrigerators are typically located in the center of the kitchen, making food and drinks easily accessible and cleanup simple.

[0004] However, built-in refrigerators also have many problems. For example, the refrigerator is sealed all around, resulting in poor heat dissipation. Ordinary heat dissipation methods are difficult to meet the needs, which will cause the exhaust and condensation temperatures to rise. In severe cases, the external condensation fan will be overheated and deformed.

[0005] Existing solutions for cooling built-in refrigerators offer numerous solutions, most of which rely on limited bottom height cooling, resulting in poor cooling performance. For example, a wine cabinet with bottom cooling uses a single-sided air intake and exhaust system. This approach inevitably prevents heat from entering when the door is opened, resulting in limited cooling performance.

[0006] In summary, the heat dissipation effect of the built-in refrigerator in the prior art is poor. Summary of the Invention

[0007] A refrigerator is provided in an embodiment of the present invention to solve the problem of poor heat dissipation effect of built-in refrigerators in the prior art.

[0008] To achieve the above-mentioned purpose, the present invention provides a refrigerator, comprising: a water tank for receiving defrost water collected in the refrigerator; a heat exchanger arranged inside the water tank; a centrifugal fan arranged above the heat exchanger, and the heat exchanger is located at the air inlet position of the centrifugal fan.

[0009] Furthermore, the heat exchanger has fins; a predetermined distance L0 is defined between the bottom surface of the heat exchanger and the bottom surface of the water tank; and a maximum height of the defrost water accumulated inside the water tank is L1, where L1 is less than L0.

[0010] Furthermore, the centrifugal fan includes:

[0011] a first centrifugal fan, wherein the rated speed of the first centrifugal fan is a first speed N1;

[0012] a second centrifugal fan, wherein the rated speed of the second centrifugal fan is a second speed N2, and the second centrifugal fan is arranged side by side with the first centrifugal fan;

[0013] The first centrifugal fan and the second centrifugal fan can operate independently, and N2>N1.

[0014] Furthermore, the area of ​​the heat exchanger covered by the first centrifugal fan is the same as the area of ​​the heat exchanger covered by the second centrifugal fan;

[0015] The heat exchanger completely covers the air inlet of the first centrifugal fan and the air inlet of the second centrifugal fan.

[0016] Furthermore, an air inlet hole communicating with the air inlet area of ​​the refrigerator is provided on the side wall of the water tank, and the air inlet hole is provided at a position higher than the maximum height at which the defrost water accumulates inside the water tank;

[0017] An air guide duct is formed inside the water tank, the air guide duct is communicated with the air inlet, and an air outlet end of the air guide duct is located at the bottom of the water tank;

[0018] The guide air duct is used to guide the air entering from the air inlet hole into the bottom of the water tank, and then enter the air inlet of the centrifugal fan from the bottom of the water tank through the heat exchanger.

[0019] Furthermore, the air outlet of the centrifugal fan is connected to the air outlet area of ​​the refrigerator;

[0020] The refrigerator air inlet area and the refrigerator air outlet area are both located at the bottom of the refrigerator, and the refrigerator air inlet area and the refrigerator air outlet area are adjacent to each other and separated by a partition.

[0021] Furthermore, the refrigerator air outlet area is located below the water tank, and the refrigerator air outlet area completely covers the bottom area of ​​the water tank.

[0022] Furthermore, the air outlet of the centrifugal fan is connected to the air outlet area of ​​the refrigerator;

[0023] The air outlet end of the refrigerator air outlet area is located at the front of the refrigerator, the refrigerator door is arranged at the front of the refrigerator, and the air outlet end of the refrigerator air outlet area is located below the door;

[0024] A baffle is provided at the air outlet end of the refrigerator air outlet area, and the baffle closes the air outlet end of the refrigerator air outlet area when the door is opened, and opens the air outlet end of the refrigerator air outlet area when the door is closed.

[0025] Furthermore, the first end of the baffle is a wind shield portion for shielding the air outlet end of the refrigerator air outlet area, the second end of the baffle is an abutment portion for cooperating with the door, a pivot shaft is provided between the first end of the baffle and the second end of the baffle, and the baffle is connected to the refrigerator body through the pivot shaft;

[0026] The box door has a top-butting protrusion, and the box body is provided with an avoidance groove corresponding to the top-butting protrusion, and the abutting portion is located in the avoidance groove;

[0027] When the door is closed, the abutting protrusion is located in the avoidance groove and pushes the abutting portion. During the movement of the abutting portion, the wind shield portion is driven to rotate, and the wind shield portion opens the air outlet end of the refrigerator air outlet area;

[0028] When the door is opened, the abutting protrusion is located outside the avoidance groove and is separated from the abutting portion, and the wind shielding portion blocks and closes the air outlet end of the refrigerator air outlet area.

[0029] Furthermore, the distance between the first end of the baffle and the pivot axis is greater than the distance between the second end of the baffle and the pivot axis;

[0030] When the door is opened, the wind shield moves to a position shielding the air outlet end of the refrigerator air outlet area due to its own gravity.

[0031] Furthermore, the abutment portion is connected to an elastic return member, and the elastic return member applies an elastic force to the abutment portion, so that the abutment portion moves and drives the wind shield portion to rotate to a position that blocks the air outlet end of the refrigerator air outlet area.

[0032] The refrigerator introduces the defrost water in the water receiving tray into the bottom of the water tank. After the defrost water flows into the water tank, it accumulates at the bottom of the water tank. When the centrifugal fan rotates, it can absorb the accumulated water at the bottom of the water tank upwards, first forming a water film. Then, as it continues to move upwards, it will be broken up by the fins on the heat exchanger and separated into droplets that are distributed throughout the fins and heat exchange tubes of the heat exchanger. The defrost water effectively cools the heat exchanger. After the defrost water contacts the heat exchanger, it partially evaporates to form water vapor, which is discharged by the centrifugal fan, forming a water mist heat dissipation effect. The water cooling efficiency is higher than that of air cooling, so even if there is only a small bottom space, the heat dissipation effect is very outstanding. In summary, the refrigerator of the present invention can effectively dissipate heat. Even if it is an embedded refrigerator, it can ensure heat dissipation and improve the stability and energy efficiency of the refrigerator operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 This is a schematic structural diagram of the back of a refrigerator according to an embodiment of the present invention;

[0034] Figure 2 is a schematic diagram of the internal structure of a refrigerator according to an embodiment of the present invention;

[0035] Figure 3 Schematic diagram of heat dissipation and air outlet of a refrigerator according to an embodiment of the present invention;

[0036] Figure 4 Schematic diagram of the heat dissipation mechanism of the refrigerator according to an embodiment of the present invention;

[0037] Figure 5 is a schematic structural diagram of the front side of a refrigerator according to an embodiment of the present invention;

[0038] Figure 6 1 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention when the door is open;

[0039] Figure 7 2 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention when the door is closed. DETAILED DESCRIPTION

[0040] The present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments, but they are not intended to limit the present invention.

[0041] See also Figures 1 to 7 As shown, according to an embodiment of the present invention, a refrigerator is provided, which includes a water tank 10, a heat exchanger 20 and a centrifugal fan 30 arranged inside the box body, the water tank 10 is used to receive the defrost water collected in the refrigerator; the heat exchanger 20 is arranged inside the water tank 10; the centrifugal fan 30 is arranged above the heat exchanger 20, and the heat exchanger 20 is located at the air inlet position of the centrifugal fan 30.

[0042] The refrigerator introduces the defrost water in the water receiving tray into the bottom of the water tank. After the defrost water flows into the water tank, it accumulates at the bottom of the water tank. When the centrifugal fan rotates, it can absorb the accumulated water at the bottom of the water tank upwards, first forming a water film, and then continuing the upward process will be broken up by the fins on the heat exchanger and separated into droplets distributed throughout the fins and heat exchange tubes of the heat exchanger (condenser). The defrost water effectively cools the heat exchanger (condenser). After the defrost water contacts the heat exchanger (condenser), it partially evaporates to form water vapor, which is discharged by the centrifugal fan, forming a water mist heat dissipation effect. The water cooling efficiency is higher than that of air cooling, so even if there is only a narrow bottom space, the heat dissipation effect is also very outstanding. In summary, the refrigerator of the present invention can effectively dissipate heat, and even if it is an embedded refrigerator, it can ensure heat dissipation, thereby improving the stability and energy efficiency of the refrigerator operation.

[0043] Inside the compressor cavity at the back of the refrigerator, the compressor is placed on the left side and the water tank on the right. The heat exchanger (condenser) is placed inside the water tank and secured with a side panel. Only the fins of the heat exchanger (condenser) are exposed. A centrifugal fan is installed at a distance d above the heat exchanger (condenser), with only the air inlet exposed between the centrifugal fan and the condenser.

[0044] Preferably, the heat exchanger 20 has fins; there is a predetermined distance L0 between the bottom surface of the heat exchanger 20 and the bottom surface of the water tank 10 (not shown); the maximum height of the defrost water accumulated inside the water tank 10 is L1 (see Figure 3 ), L1<L0.

[0045] Since the amount of defrosting water is small, L1 is generally smaller than the distance L0 between the bottom of the condenser and the bottom of the water tank. This will prevent the fins from being directly immersed or partially immersed, thus avoiding the damage to the heat exchanger such as rust caused by fin immersion. This will extend the service life of the heat exchanger, ensure the long-term stability of the refrigerator, and extend the service life of the refrigerator.

[0046] See also Figure 3 When the speed of the centrifugal fan is N0, the adsorption force is F1, which can absorb the accumulated water at the bottom of the water tank upwards, forming a water film first, and then continuing the upward process will be broken up by the fins and separated into droplets distributed throughout the condenser fins and heat exchange tubes. The total adsorption height of the accumulated water is L2.

[0047] Combine Figure 2 and Figure 4 As shown, the centrifugal fan 30 includes a first centrifugal fan 31 and a second centrifugal fan 32. The rated speed of the first centrifugal fan 31 is a first speed N1; the rated speed of the second centrifugal fan 32 is a second speed N2. The second centrifugal fan 32 is arranged side by side with the first centrifugal fan 31; the first centrifugal fan 31 and the second centrifugal fan 32 can operate independently, and N2>N1.

[0048] Because defrost water is relatively small, at high centrifugal fan speeds and high adsorption capacity, it can quickly evaporate or be partially discharged as droplets, resulting in underutilized water. Furthermore, the temperature difference in heat exchange across the condenser is uneven, impacting overall performance. Therefore, to maximize defrost water utilization, the present invention employs two centrifugal fans (first centrifugal fan 31 and second centrifugal fan 32) with different speeds and coordinates them with the condenser flow path layout.

[0049] lie in Figure 4 The second centrifugal fan is on the left. It controls the heat exchange of the condenser. At this time, the condensation temperature is high. The speed is set to N2>N1, the adsorption force is large, and the adsorption height is L3. Figure 4The first centrifugal fan is on the right, with a relatively low rotation speed N1 and a small adsorption force. The adsorption height of the first centrifugal fan is L4, and L4 is less than L3. This differentiated adsorption effect allows the local fins and heat exchange tubes of the incoming condenser to exchange heat with the water film first, making it easier to evaporate and fully utilize. The heat exchange adsorption height of the condenser outlet is low, and the water film and water droplets are not easily directly sucked out and thrown out by the first centrifugal fan, thus avoiding waste. It can also make the refrigerant in the condenser condense into liquid (condensation temperature) within a shorter stroke, and when it flows out, it is cooled a second time by the water film adsorbed by the first centrifugal fan, achieving a greater degree of subcooling, which is beneficial to the performance of the entire machine.

[0050] Of course, when necessary, the first centrifugal fan 31 and the second centrifugal fan 32 can be controlled to operate separately. The first centrifugal fan 31 and the second centrifugal fan 32 can operate simultaneously or separately, and can be specifically adjusted according to the defrost water and actual needs.

[0051] To optimize the heat exchange performance of the heat exchanger (condenser) of the present invention by ensuring uniform heat exchange, in this embodiment, the area of ​​the heat exchanger 20 covered by the first centrifugal fan 31 is the same as the area covered by the second centrifugal fan 32; the heat exchanger 20 completely covers the air inlet of both the first centrifugal fan 31 and the second centrifugal fan 32. In other words, air entering from the bottom of the water tank must pass through the heat exchanger before entering the air inlet of both the first centrifugal fan 31 and the second centrifugal fan 32. Furthermore, the two centrifugal fans each cover the same heat exchanger area, allowing air to more evenly exchange heat with the fins and heat exchange tubes of the heat exchanger, fully utilizing the heat exchange area, improving heat exchange efficiency, and ultimately enhancing heat dissipation.

[0052] Preferably, see Figure 1 and Figure 2 The side wall of the water tank 10 is provided with an air inlet 11 connected to the refrigerator air inlet area 41, and the setting position of the air inlet 11 is higher than the maximum height of the defrost water accumulated inside the water tank 10;

[0053] An air guide duct 12 is formed inside the water tank 10 , and the air guide duct 12 is connected to the air inlet 11 , and an air outlet end of the air guide duct 12 is located at the bottom of the water tank 10 ;

[0054] The guide air duct 12 is used to guide the air entering through the air inlet 11 into the bottom of the water tank 10 , and then enter the air inlet of the centrifugal fan 30 from the bottom of the water tank 10 through the heat exchanger 20 .

[0055] The air inlet 11 is positioned to prevent defrost water from overflowing from the air inlet 11 and to prevent the incoming air from being unable to enter the water tank through the air inlet 11. The guide air duct 12 is formed by the internal structural plate of the water tank and surrounds the heat exchanger 20. Figure 2 The air flow direction indicated by the middle arrow is that the air entering the refrigerator air inlet area 41 passes through the air inlet hole 11 and enters the guide air duct 12, and then flows from top to bottom into the bottom of the water tank 10. The air brings up the accumulated water at the bottom and then enters the air inlet of the centrifugal fan 30 (the first centrifugal fan 31 and the second centrifugal fan 32).

[0056] Combine Figure 2 and Figure 3 As shown, the air outlet of the centrifugal fan 30 is connected to the refrigerator air outlet area 42; the refrigerator air inlet area 41 and the refrigerator air outlet area 42 are both located at the bottom of the refrigerator, and the refrigerator air inlet area 41 and the refrigerator air outlet area 42 are adjacently arranged and separated by a partition 43.

[0057] Because the refrigerator needs to be built into furniture, it is important to maximize the use of the refrigerator's internal space. In the present invention, the refrigerator air inlet area 41 and refrigerator air outlet area 42 are located at the bottom of the refrigerator and separated by a partition. Air intake and air outlet are conducted through the bottom of the refrigerator, which can minimize the size of the refrigerator and utilize the refrigerator's structure for layout. Furthermore, when a built-in refrigerator is built into furniture, the space is limited, resulting in limited heat dissipation space at the top and back. Therefore, arranging the refrigerator air inlet area 41 and refrigerator air outlet area 42 at the bottom can also improve the refrigerator's heat dissipation effect.

[0058] Preferably, the refrigerator air outlet area 42 is located below the water tank 10 and completely covers the bottom area of ​​the water tank 10. This further increases structural utilization, as the air flowing out of the refrigerator air outlet area 42 is heat-exchanged air, which has a relatively high temperature and can heat the sidewalls of the refrigerator air outlet area. The bottom area of ​​the water tank 10 is located just above the refrigerator air outlet area 42, meaning that the bottom of the water tank and the top plate of the refrigerator air outlet area are the same structural plate or are in adjacent contact. Therefore, only the temperature of the refrigerator air outlet area can heat the water inside the water tank, facilitating water evaporation. The evaporated water then helps dissipate heat from the heat exchanger fins.

[0059] See also Figure 3 and Figure 5The air outlet of the centrifugal fan 30 is connected to the refrigerator air outlet area 42; the air outlet end of the refrigerator air outlet area 42 is located at the front of the refrigerator, and the refrigerator door 51 is set at the front of the refrigerator, and the air outlet end of the refrigerator air outlet area 42 is located below the door 51; a baffle 60 is provided at the air outlet end of the refrigerator air outlet area 42, and the baffle 60 closes the air outlet end of the refrigerator air outlet area 42 when the door 51 is opened, and the baffle 60 opens the air outlet end of the refrigerator air outlet area 42 when the door 51 is closed.

[0060] The front of the refrigerator is the side facing the user, and the front of the refrigerator is flush with the front of the furniture. When a built-in refrigerator is embedded in furniture, the space is limited, and the heat dissipation space at the top and back is limited. Placing the air outlet of the refrigerator air outlet area 42 at the front of the refrigerator allows for timely discharge of heat-dissipating air, effectively improving heat dissipation. Compared to prior art methods that place the air outlet at the back or side of the refrigerator, this effectively prevents hot air from accumulating, preventing it from affecting air flow and heat dissipation.

[0061] Considering that the refrigerator door is also at the bottom, if the user opens the door, the hot air discharged from the bottom will directly enter the freezer compartment, causing large temperature fluctuations. Therefore, the present invention provides a baffle 60 that can close the outlet end of the refrigerator air outlet area 42 when the user opens the refrigerator door (such as the freezer door), preventing the hot air from being discharged directly into the freezer compartment. This not only prevents large temperature fluctuations in the freezer compartment, but also effectively saves energy and electricity.

[0062] Taking energy saving and structural stability into consideration, the present invention eliminates the electric structure and adopts a mechanical structure to design the structure of the baffle. Specifically:

[0063] The first end of the baffle 60 is a wind shield 61 for shielding the air outlet end of the refrigerator air outlet area 42. The second end of the baffle 60 is an abutment portion 62 for engaging with the refrigerator door 51. A pivot shaft 63 is provided between the first end and the second end of the baffle 60. The baffle 60 is connected to the refrigerator body 52 via the pivot shaft 63.

[0064] The box door 51 has a top-butting protrusion 51a, and the box body 52 is provided with an avoidance groove 52a corresponding to the top-butting protrusion 51a, and the abutting portion 62 is located in the avoidance groove 52a;

[0065] When the door 51 is closed, the abutting protrusion 51a is located in the avoidance groove 52a and pushes against the abutting portion 62. During the movement of the abutting portion 62, the wind shield 61 is driven to rotate, and the wind shield 61 opens the air outlet end of the refrigerator air outlet area 42.

[0066] When the door 51 is opened, the abutting protrusion 51 a is located outside the avoidance groove 52 a and is separated from the abutting portion 62 , and the wind shielding portion 61 blocks and closes the air outlet end of the refrigerator air outlet area 42 .

[0067] The present invention utilizes a specifically designed baffle structure to cooperate with the door's abutment protrusion 51a. This structure automatically blocks and closes the outlet of the refrigerator's air outlet area 42 when the refrigerator door is opened. When the refrigerator door is closed, the positional relationship of the structure automatically opens the outlet of the refrigerator's air outlet area 42, achieving full automation and intelligent structure. This not only offers a clever design but also saves energy and electricity. Compared to electrically operated systems, mechanical structures are more stable, durable, and less susceptible to damage.

[0068] It should be noted that the avoidance groove 52a is arranged at the air outlet end of the adjacent refrigerator air outlet area 42, the top protrusion 51a is a columnar structure, the abutting portion 62 is a paddle shape, and the wind shielding portion 61 is a plate-like structure whose shape is adapted to match the air outlet end of the refrigerator air outlet area 42.

[0069] Preferably, the distance between the first end of the baffle 60 and the pivot axis 63 is greater than the distance between the second end of the baffle 60 and the pivot axis 63;

[0070] When the door 51 is opened, the wind shield 61 moves to a position shielding the air outlet end of the refrigerator air outlet area 42 due to its own gravity.

[0071] By designing the windshield 61 and the baffle 60 and utilizing the principle of leverage, the windshield 61 automatically moves under its own gravity to a position shielding the outlet end of the refrigerator air outlet area 42 when the refrigerator door 51 is opened. This structure can utilize the baffle's own structural shape, eliminating the need for a reset mechanism, reducing structural complexity, and making the structure more stable, less prone to damage, and easier to maintain.

[0072] Of course, other structures can also be used to reset the baffle. In another embodiment not shown in the figure, the abutting portion 62 is connected to an elastic reset member, and the elastic reset member applies an elastic force to the abutting portion 62, causing the abutting portion 62 to move and drive the windshield 61 to rotate to a position that blocks the air outlet end of the refrigerator air outlet area 42. The elastic reset member is a spring, and a push-up protrusion is provided on the door. When the door is closed, the push-up protrusion will push against the abutting portion and compress the spring, causing the windshield to assume an open angle and discharge hot air. When the door is opened, the push-up protrusion leaves the avoidance groove, and the elastic force of the spring resets the windshield, directly blocking the air outlet end of the refrigerator air outlet area 42 at the bottom. At the same time, the refrigerator detects that the door (freezer door) is open, and the centrifugal fan stops or reduces its speed to reduce the discharge of hot air.

[0073] When the ambient temperature is detected to be high or the condensing temperature is too high, the centrifugal fan speed increases, the adsorption force increases, and the condenser heat exchange effect is better. At this time, setting the appropriate condenser thickness can prevent defrost water from being blown out directly with the centrifugal fan (that is, a condenser that is too thin has poor effect).

[0074] When the refrigerator's human sensing device detects user activity nearby and the condensing temperature is not too high, it reduces the speed of the centrifugal fan and weakens the hot air discharged from the bottom to avoid blowing on the user's feet and causing discomfort.

[0075] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, tasks, devices, components and / or combinations thereof.

[0076] It should be noted that the terms "first," "second," and the like in the specification and claims of this application and the accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein.

[0077] Of course, the above are preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the basic principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: A water tank (10) for receiving and collecting defrost water from the refrigerator; a heat exchanger (20) disposed inside the water tank (10); A centrifugal fan (30) is arranged above the heat exchanger (20), and the heat exchanger (20) is located at the air inlet of the centrifugal fan (30); An air inlet hole (11) communicating with the refrigerator air inlet area (41) is provided on a side wall of the water tank (10), and the air inlet hole (11) is provided at a position higher than the maximum height at which the defrost water accumulates inside the water tank (10); An air guide duct (12) is formed inside the water tank (10), the air guide duct (12) is communicated with the air inlet (11), and the air outlet end of the air guide duct (12) is located at the bottom of the water tank (10); The guide air duct (12) is used to guide the air entering through the air inlet (11) into the bottom of the water tank (10), and then enter the air inlet of the centrifugal fan (30) from the bottom of the water tank (10) through the heat exchanger (20).

2. The refrigerator according to claim 1, wherein: The heat exchanger (20) has fins; There is a predetermined distance L0 between the bottom surface of the heat exchanger (20) and the bottom surface of the water tank (10); The maximum height of the defrost water accumulated inside the water tank (10) is L1, and L1 < L0.

3. The refrigerator according to claim 2, characterized in that The centrifugal fan (30) comprises: a first centrifugal fan (31), wherein the rated speed of the first centrifugal fan (31) is a first speed N1; a second centrifugal fan (32), wherein the rated speed of the second centrifugal fan (32) is a second speed N2, and the second centrifugal fan (32) and the first centrifugal fan (31) are arranged side by side; The first centrifugal fan (31) and the second centrifugal fan (32) can operate independently, and N2>N1.

4. The refrigerator according to claim 3, characterized in that The area covered by the first centrifugal fan (31) of the heat exchanger (20) is the same as the area covered by the second centrifugal fan (32) of the heat exchanger (20); The heat exchanger (20) completely covers the air inlet of the first centrifugal fan (31) and the air inlet of the second centrifugal fan (32).

5. The refrigerator according to claim 1, wherein The air outlet of the centrifugal fan (30) is in communication with the air outlet area (42) of the refrigerator; The refrigerator air inlet area (41) and the refrigerator air outlet area (42) are both located at the bottom of the refrigerator. The refrigerator air inlet area (41) and the refrigerator air outlet area (42) are adjacently arranged and separated by a partition (43).

6. The refrigerator according to claim 5, characterized in that The refrigerator air outlet area (42) is located below the water tank (10), and the refrigerator air outlet area (42) completely covers the bottom area of ​​the water tank (10).

7. The refrigerator according to claim 1, wherein The air outlet of the centrifugal fan (30) is in communication with the air outlet area (42) of the refrigerator; The air outlet end of the refrigerator air outlet area (42) is located at the front of the refrigerator, the refrigerator door (51) is arranged at the front of the refrigerator, and the air outlet end of the refrigerator air outlet area (42) is located below the refrigerator door (51); A baffle (60) is provided at the air outlet end of the refrigerator air outlet area (42), and the baffle (60) closes the air outlet end of the refrigerator air outlet area (42) when the refrigerator door (51) is opened, and opens the air outlet end of the refrigerator air outlet area (42) when the refrigerator door (51) is closed.

8. The refrigerator according to claim 7, characterized in that The first end of the baffle (60) is a wind shield (61) for shielding the air outlet end of the refrigerator air outlet area (42); the second end of the baffle (60) is an abutment portion (62) that cooperates with the door (51); a pivot shaft (63) is provided between the first end of the baffle (60) and the second end of the baffle (60); and the baffle (60) is connected to the refrigerator body (52) via the pivot shaft (63); The box door (51) has a top-butting protrusion (51a), and the box body (52) is provided with an avoidance groove (52a) corresponding to the top-butting protrusion (51a), and the abutting portion (62) is located in the avoidance groove (52a); When the door (51) is closed, the abutting protrusion (51a) is located in the avoidance groove (52a) and pushes against the abutting portion (62). During the movement of the abutting portion (62), the wind shielding portion (61) is driven to rotate, and the wind shielding portion (61) opens the air outlet end of the refrigerator air outlet area (42); When the door (51) is opened, the abutting protrusion (51a) is located outside the avoidance groove (52a) and is separated from the abutting portion (62), and the wind shielding portion (61) blocks and closes the air outlet end of the refrigerator air outlet area (42).

9. The refrigerator according to claim 8, characterized in that The distance between the first end of the baffle (60) and the pivot axis (63) is greater than the distance between the second end of the baffle (60) and the pivot axis (63); When the door (51) is opened, the wind shield (61) moves to a position shielding the air outlet end of the refrigerator air outlet area (42) by its own gravity.

10. The refrigerator according to claim 8, characterized in that The abutting portion (62) is connected to an elastic reset member, and the elastic reset member applies an elastic force to the abutting portion (62), so that the abutting portion (62) moves and drives the wind shielding portion (61) to rotate to a position that blocks the air outlet end of the refrigerator air outlet area (42).

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