CN111457654A

CN111457654A - Air supply device and refrigerator

Info

Publication number: CN111457654A
Application number: CN201910047042.3A
Authority: CN
Inventors: 苗松涛; 韩晓蕾; 王国靖; 邱林杰
Original assignee: Panasonic Intellectual Property Management Co Ltd
Current assignee: Panasonic Intellectual Property Management Co Ltd
Priority date: 2019-01-18
Filing date: 2019-01-18
Publication date: 2020-07-28
Anticipated expiration: 2039-01-18
Also published as: CN111457654B

Abstract

The invention provides an air supply device and a refrigerator with the same, wherein the air supply device (100) comprises: a housing (10) having at least one air inlet (15) and a plurality of air outlets (16, 17); a fan (20) which is provided in the housing (10), and which is capable of sucking air through the air inlet (15) and discharging air through the air outlets (16, 17); a plurality of shielding sections (30) that are provided in correspondence with the plurality of air outlets (16, 17), respectively, and that open and close the air outlets (16, 17); a guide section (40) fixed in the housing (10) and supporting and guiding the shielding section (30); and a drive unit (50) that drives the shield unit (30) and moves the shield unit (30) along the guide unit (40) to open and close the air outlets (16, 17). According to the air blowing device of the present invention, the air blowing amount in each air blowing passage can be appropriately adjusted.

Description

Air supply device and refrigerator

Technical Field

The present invention relates to an air supply device capable of adjusting the amount of air supplied to each air supply passage, and a refrigerator having the same.

Background

In the existing refrigerator, cold air is generated through a built-in evaporator and circularly flows to each storage compartment of the refrigerator through an air duct to realize refrigeration. However, if the amount of cold air is not adjusted and the cold air is allowed to flow randomly through the air duct, and particularly, the air volume of the freezing chamber of many refrigerators is adjusted without providing a baffle, the freezing chamber is cooled at the same time when the refrigerator is cooled, so that the evaporation temperature is lowered, and the efficiency of the cooling system of the refrigerator is lowered. In addition, when defrosting is performed, heat may enter the compartment, raising the temperature in the compartment, and causing a large temperature fluctuation. Therefore, a blower device capable of adjusting the amount of air blown to each duct is required.

In addition, in the conventional refrigerator, a structure in which the fan and the baffle are separately provided is generally used. For example, a cold room or a freezer compartment damper is separately provided for adjusting the amount of air supplied to each compartment. However, the separate provision of the baffle requires a large space, which affects the storage space inside the refrigerator.

The prior art also discloses an air supply device integrating a fan and a baffle, wherein a circular rotary baffle is arranged on the air outlet side of the fan, and the air outlet area can be adjusted by rotating the baffle. However, in such a configuration, the applicable air outlet area is small, which results in a large pressure loss, and the sealing performance is also poor because a gap is formed between the rotating member and the casing due to the rotating structure.

Disclosure of Invention

The present invention has been made in view of the above problems, and it is an object of the present invention to provide a blower device in which a fan and a baffle are integrally combined, and in which the amount of air blown into each air blowing duct can be increased and the amount of air blown into each air blowing duct can be adjusted over a wide range, and a refrigerator having the blower device.

An air blowing device according to an embodiment of the present invention includes: a housing having at least one air inlet and a plurality of air outlets; a fan disposed in the housing, capable of sucking air into the housing through the air inlet and discharging the air through the air outlet; a plurality of shielding portions that are provided corresponding to the plurality of outlets, respectively, and that open and close the outlets; a guide portion fixed in the housing for supporting and guiding the shielding portion; and a driving unit that drives the shielding unit to move the shielding unit along the guide unit within the housing to open and close the outlet.

In the blower device according to the present invention, it is preferable that the fan is a centrifugal fan, and the plurality of shielding portions are disposed on an outer periphery of the fan so as to surround an air outlet surface of the fan.

In the blower device according to the present invention, it is preferable that a wind guide member for guiding the gas flowing to the outlet is provided in the casing.

In the blower device according to the present invention, it is preferable that each of the plurality of shielding portions is formed to be movable independently of each other.

In the blower device according to the present invention, it is preferable that a rack portion is formed at one end of the shielding portion, the driving portion is a stepping motor having an output gear, and the shielding portion is driven by engaging the output gear with the rack portion of the shielding portion.

In the blower device according to the present invention, it is preferable that the housing includes a first support body and a second support body disposed to face each other, and the drive unit moves the shielding unit between the first support body and the second support body along the guide unit.

In the blower device according to the present invention, it is preferable that a protruding portion protruding toward the first support body is formed in the second support body, the fan is fixed to the protruding portion, the driving portion opens the outlet port by moving the shielding portion toward the protruding portion along the guide portion, and closes the outlet port by moving the shielding portion toward the first support body along the guide portion.

In the blower device according to the present invention, it is preferable that the guide portion includes a shaft portion provided on the first support body or the second support body so as to stand with respect to a support surface of the first support body or the second support body, and the shielding portion is movable along the shaft portion.

In the blower device according to the present invention, it is preferable that the guide portion includes a plate-like object that is provided on the first support body or the second support body so as to stand on the support surface of the first support body or the second support body and is located between end portions of the plurality of shielding portions, and the shielding portions are movable along end edges of the plate-like object.

In addition, another object of the present invention is to provide a refrigerator, comprising: the air supply device; a cooling unit for cooling the gas; and the air supply channel is communicated with the chamber of the refrigerator and supplies cold air to the chamber of the refrigerator, the air inlet of the air supply device is communicated to the cooling unit and used for sucking the cold air from the cooling unit, and the air outlet of the air supply device is communicated to the air supply channel.

In the refrigerator according to the present invention, it is preferable that the refrigerator further includes a control unit for controlling the driving unit according to temperatures of different compartments in the refrigerator to move the shielding unit by a predetermined amount along the guide unit, thereby adjusting an opening/closing degree of the outlet.

In the refrigerator according to the present invention, it is preferable that the plurality of outlets of the air blowing device are respectively communicated to different air blowing passages in the refrigerator, and the plurality of shielding portions are respectively formed to be movable independently of each other.

In addition, in the refrigerator of the present invention, preferably, the plurality of air outlets include: a first air outlet communicated to an air supply channel of a refrigerating chamber of the refrigerator; and a second air outlet communicated to an air supply channel of a freezing chamber of the refrigerator.

In the refrigerator according to the present invention, it is preferable that the control unit completely closes the second outlet of the air blowing passage communicating with the freezing chamber when the temperature of the refrigerating chamber is controlled.

In addition, in the refrigerator of the present invention, it is preferable that the control part completely closes the plurality of air outlets during defrosting of the refrigerator.

ADVANTAGEOUS EFFECTS OF INVENTION

According to the air supply device and the refrigerator, the fan and the baffle plate, namely the shielding part which are separately arranged originally can be combined into a whole, so that the storage space in the refrigerator is enlarged, compared with the structure of the circular rotary baffle plate in the prior art, the air supply quantity in each air supply channel can be enlarged, the air supply quantity of each air supply channel can be adjusted in a larger range, and the temperature of each compartment can be accurately controlled.

Drawings

Fig. 1 is an exploded perspective view of an air blower according to embodiment 1 of the present invention.

Fig. 2 is a partially enlarged view showing an air blowing device according to embodiment 1 of the present invention.

Fig. 3 is a schematic view showing that the blower device according to embodiment 1 of the present invention is mounted on a refrigerator.

Fig. 4 is a cross-sectional view showing a case where all of a plurality of shielding portions of the blower according to embodiment 1 of the present invention are closed.

Fig. 5 is a sectional view showing a case where a plurality of shielding portions of the blower device according to embodiment 1 of the present invention are all opened.

Fig. 6 is a cross-sectional view showing a blower according to embodiment 1 of the present invention with one of the shielding portions fully opened.

Fig. 7 is a cross-sectional view showing a blower according to embodiment 1 of the present invention in which one side shield portion is partially opened and the other side shield portion is fully opened.

Fig. 8 is a partially enlarged view showing an air blowing device according to embodiment 2 of the present invention.

Fig. 9 is a partially enlarged view showing a blower according to a modification of embodiment 2 of the present invention.

Detailed Description

Hereinafter, preferred embodiments of a refrigerator according to the present invention will be described in detail with reference to the accompanying drawings. In the description of the drawings, the same or corresponding portions are denoted by the same reference numerals, and redundant description is omitted.

< embodiment 1>

Fig. 1 is an exploded perspective view showing an air blowing device 100 according to embodiment 1 of the present invention, and fig. 2 is a partially enlarged view of the air blowing device 100.

As shown in fig. 1 and 2, air blower 100 according to embodiment 1 of the present invention includes a casing 10 and a fan 20 provided in casing 10. The casing 10 includes a first support body 11 and a second support body 12 disposed opposite to each other, and has at least one air inlet 15 provided in the first support body 11 so as to penetrate the first support body 11, and a plurality of air outlets (for example, an upper air outlet 16 and a lower air outlet 17 described later) formed between the first support body 11 and the second support body 12, that is, surrounded by the first support body 11, the second support body 12, and the like.

Further, for example, the first support body 11 in the casing 10 is provided with a wind guide member 14 capable of guiding and discharging the gas flowing to the wind outlet 16 upward, for example. A projection 13 projecting toward the first support body 11 is formed on the second support body 12, and the fan 20 is fixed to a surface of the projection 13 on the first support body 11 side and is disposed so as to face the air inlet 15. By operating the fan 20, air can be sucked into the casing 10 through the air inlet 15 and discharged in a plurality of different directions or air supply passages through the plurality of air outlets, the air guide member 14, and the like. In fig. 1, only the air guide member 14 for guiding the air upward is provided in the casing 10, but a plurality of air guide members may be separately provided as necessary, and the air in the casing 10 may be guided in a plurality of different directions or air blowing passages, for example, upward or downward, through the plurality of air guide members.

Further, air blowing device 100 includes: a plurality of shielding portions 30 each including, for example, an upper shielding portion 31 and a lower shielding portion 32, the upper shielding portion 31 and the lower shielding portion 32 being provided in one-to-one correspondence with the plurality of air outlets, respectively, and opening and closing the plurality of air outlets to adjust an air output amount of the gas discharged from the air blower 100 through the air outlets; a guide section 40 fixed to the first support body 11 or the second support body 12 in the housing 10, for supporting and guiding the plurality of shade sections 10; and a driving unit 50 for driving the plurality of shutters 10 to reciprocate the shutters 10 along the guide unit 40 between the first support body 11 and the second support body 12, thereby opening and closing the plurality of outlets and adjusting the air output of the plurality of outlets. The shielding portion 30 has a shape capable of completely sealing the outlet when closed. The upper shield portion 31 and the lower shield portion 32 of the shield portion 30 have, for example, arc-shaped curved surfaces, that is, curved surfaces corresponding to the air outlet surface of the fan 20. However, the blocking portion 30 of the present invention is not limited thereto, and may be a flat plate as long as it can open and close the plurality of outlets.

Here, the fan 20 may be a centrifugal fan or an axial fan. However, from the viewpoint of downsizing, a centrifugal fan is preferably used. In the case where the fan 20 is a centrifugal fan, since the air outlet direction of the fan 20 is perpendicular to the rotation axis of the fan, the plurality of shielding portions 30 are preferably arranged on the outer periphery of the fan 20 so as to surround the air outlet surface of the fan 20, that is, the surface in the blade rotation direction of the fan 20. Therefore, the air flow from the fan 20 to the air outlet can be better shielded, and a better air output adjusting effect is achieved. In this case, a wind guide member may be provided near the wind outlet surface (i.e., the surface opposite to the wind inlet surface) of the fan 20 to guide the airflow to the wind outlet.

It is preferable that each of the plurality of shielding portions 30 is formed to be movable independently of each other, so that any one of the shielding portions 30 can be driven independently via the driving portion 50, and the opening/closing degree of the outlet corresponding to the shielding portion 30 can be controlled independently, thereby controlling the air output of the outlet.

In fig. 2, the guide portion 40 is formed of, for example, a plurality of shaft portions (columnar members), and includes 4 shaft portions, i.e.,

upper shaft portions

41 and 42 positioned on the upper side and

lower shaft portions

43 and 44 positioned on the lower side, and the

upper shaft portions

41 and 42 and the

lower shaft portions

43 and 44 are provided on the first support body 11 or the second support body 12 so as to stand on the support surface of the first support body 11 or the second support body 12. The

upper shaft portions

41 and 42 support the upper shield portion 31 inside the housing 10 so as to penetrate both left and right ends of the upper shield portion 31, and guide the upper shield portion 31. The

lower shaft portions

43 and 44 support the lower shielding portion 32 inside the housing 10 so as to penetrate through both left and right ends of the lower shielding portion 32, and guide the lower shielding portion 32. The present invention is not limited to this, and for example, one shielding portion 30 may be supported and guided by 1 or 3 or more shaft portions, and the guide portion 40 may be formed by a plurality of shaft portions, or may be formed by a member having another shape such as a plate-like member. The guide portion 40 may be provided perpendicular to the support surface or may be provided obliquely to the support surface, as long as the shielding portion 30 can be stably fixed in the housing 10 and guided.

The driving unit 50 drives the upper shield 31 and the lower shield 32 to move along the guide unit 40, so that the opening/closing degree of the outlet port in the air flow path from the outlet face of the fan 20 to the different air blowing passages can be controlled based on the movement amounts of the upper shield 31 and the lower shield 32, thereby adjusting the air outlet amount.

The driving section 50 may be, for example, a stepping motor, is provided at one end side of the upper shield section 31 and the lower shield section 32, which are the plurality of shield sections 30, and has an output gear, not shown, and drives the upper shield section 31 and the lower shield section 32 by engaging the output gear with the rack sections 31a and 31b provided at the one end side of the upper shield section 31 and the lower shield section 32. In the case where it is necessary to independently drive the upper shield portion 31 or the lower shield portion 32, respectively, the driving portion 50 may have two output gears which are engaged with the rack portions 31a and 31b, respectively, to independently drive the upper shield portion 31 or the lower shield portion 32, respectively. The driving unit 50 is not limited to the above configuration, and for example, one driving unit 50 may be provided at each of the left and right ends of the upper shield portion 31 and the lower shield portion 32 to drive the upper shield portion 31 and the lower shield portion 32. In addition, 3 or more driving portions 50 may be provided according to the number of the shielding portions 30. The driving unit 50 is not limited to the above-described driving method, and may be another driving method, for example, a belt-type driving method, as long as the shielding unit 10 can be reciprocated between the first support body 11 and the second support body 12 along the guide unit 40.

Fig. 3 is a schematic view showing that air blowing device 100 according to embodiment 1 is attached to refrigerator 1. As shown in fig. 3, the air blowing device 100 according to embodiment 1 is provided between the evaporator 400 and the air blowing passage in the cold air flow path, the air inlet 15 is connected to the evaporator 400 and can suck the cold air from the evaporator 400 into the casing 10 of the air blowing device 100, and the plurality of air outlets are respectively connected to the air blowing passages of the compartments of the refrigerator 1. Here, the cold air flow path is a flow path in which cold air having exchanged heat with the evaporator 400 is sent to each compartment through the air blowing duct starting from the evaporator 400, and then returned to the evaporator 400 from the return air inlet of each compartment through the return air duct. Further, the air blowing device 100 is not limited to being provided between the evaporator 400 and the air blowing duct, and may be provided in an air blowing duct leading to a certain chamber.

According to the above configuration, the cold air cooled by evaporator 400 is sucked into casing 10 of air blower 100 by fan 20 through air inlet 15 of air blower 100, and after the air blowing amount is adjusted by air blower 100, flows into the air blowing duct through the air outlet of air blower 100 and is sent to each compartment of refrigerator 1. Here, the plurality of air outlets include, for example, an upper air outlet 16 and a lower air outlet 17, the upper air outlet 16 communicates with the air supply passage 201 of the refrigerating compartment 200 of the refrigerator 1, and the lower air outlet 17 communicates with the air supply passage 301 of the freezing compartment 300 of the refrigerator 1. In this way, the cold air sucked into the casing 10 of the air blowing device 100 by the fan 20 can be sent to the refrigerating compartment 201 through the upper air outlet 16 and the air blowing duct 201, and can also be sent to the freezing compartment 300 through the lower air outlet 17 and the air blowing duct 301. A control unit (not shown) of the refrigerator 1 controls the amount of movement of the upper shield portion 31 and the lower shield portion 32 along the guide portion 40 according to the temperatures of the different compartments in the refrigerator 1, and thus can adjust the degree of opening and closing of the outlet, that is, the amount of cold air supplied, and realize accurate control of the temperatures of the compartments.

Fig. 4 is a cross-sectional view showing a case where all of the plurality of shielding portions 30 of the blower 100 according to embodiment 1 are closed. As shown in fig. 4, the driving unit 50 moves both the upper shield portion 31 and the lower shield portion 32 toward the first support body 11 along the guide portion 40, so that both the upper outlet 16 and the lower outlet 17 are closed. At this time, the cold air heat-exchanged with evaporator 400 cannot be supplied to each compartment of refrigerator 1 via blower device 100.

Fig. 5 is a sectional view showing a state where all of the plurality of shielding portions 30 of the blower 100 according to embodiment 1 are open. As shown in fig. 5, the driving unit 50 moves both the upper shield portion 31 and the lower shield portion 32 along the guide portion 40 toward the protruding portion 13, that is, toward the second support body 12, so that both the upper outlet 16 and the lower outlet 17 are opened. At this time, the cold air heat-exchanged with evaporator 400 can be supplied to each compartment of refrigerator 1 through upper outlet 16 and lower outlet 17 of blower 100.

Fig. 6 is a cross-sectional view showing a state where one side shielding portion 30 of air blower 100 according to embodiment 1 is fully opened. As shown in fig. 6, the driving unit 50 drives the upper shielding portion 31 and the lower shielding portion 32, respectively, to move the upper shielding portion 31 toward the first supporting body 11 along the guiding portion 40, and move the lower shielding portion 32 toward the protruding portion 13 along the guiding portion 40, so that the upper outlet 16 is closed and the lower outlet 17 is opened. At this time, the cold air heat-exchanged with evaporator 400 can be supplied to freezing chamber 300, which is a part of the compartments of refrigerator 1, through lower outlet 17 of blower 100.

Fig. 7 is a cross-sectional view showing a state where one side shield portion 30 of the blower 100 according to embodiment 1 is partially opened and the other side shield portion 30 is fully opened. As shown in fig. 7, in the state shown in fig. 6, the driving unit 50 moves the upper shield portion 31 to the protruding portion 13 side by a predetermined distance along the guide portion 40, and the upper outlet 16 is in a partially opened state. In this case, not only can cool air be supplied to freezing compartment 300, which is a part of the compartments of refrigerator 1, through lower outlet 17 of blower 100, but also cool air of an amount corresponding to the degree of opening of upper outlet 16 can be supplied to refrigerating compartment 200, which is another compartment, through upper outlet 16.

According to embodiment 1, not only the storage space inside the refrigerator can be increased by integrating the fan 20 and the shutter, i.e., the shielding portion 30, but also the air blowing amount in each air blowing passage can be increased and adjusted in a wide range as compared with the structure of the circular rotary shutter in the related art, and the temperature of each compartment can be accurately controlled.

When controlling the temperature of the refrigerating compartment 200 of the refrigerator 1, the control unit controls the driving unit 50 to drive the upper shielding portion 31 and the lower shielding portion 32, respectively, to move the upper shielding portion 31 toward the protruding portion 13 along the guide portion 40, and to move the lower shielding portion 32 toward the first support body 11 along the guide portion 40, thereby opening the upper outlet 16 and closing the lower outlet 17. Therefore, the freezing chamber is not cooled simultaneously when the refrigerator is cooled, so that the reduction of the evaporation temperature is not caused, the refrigeration efficiency of the cooling system can be improved, and the effect of reducing the energy consumption is achieved.

During defrosting of the refrigerator 1, the control unit controls the drive unit 50 to move both the upper shield portion 31 and the lower shield portion 32 along the guide portion 40 toward the first support body 11, and to close both the upper outlet 16 and the lower outlet 17. This prevents heat from entering the compartment through the air duct and increasing the temperature in the compartment, thereby preventing temperature fluctuation from increasing, shortening the defrosting time of the refrigerator 1, and saving energy consumption of the refrigerator 1.

In embodiment 1, the air blower 100 includes the upper shield portion 31 and the lower shield portion 32, the upper shield portion 31 and the lower shield portion 32 are disposed on the outer periphery of the fan 20 so as to surround the air outlet surface of the fan 20, and the driving portion 50 is provided on the left end side of the upper shield portion 31 and the lower shield portion 32.

In contrast, the blower 100 according to the modification of embodiment 1 may have 2 shielding portions 30 located on the upper side and 2 shielding portions 30 located on the lower side, and the 4 shielding portions may be arranged on the outer periphery of the fan 20 so as to surround the air outlet surface of the fan 20. The 4 shielding parts respectively open and close air outlets communicated to different air supply channels. The blower device 100 according to the present modification further includes 2 driving units 50, the 2 driving units 50 being provided on the left and right sides of the fan 20, the left driving unit 50 driving the left upper and lower 2 shielding units 30, and the right driving unit 50 driving the right upper and lower 2 shielding units 30.

According to air blower 100 of the present modification, the same effects as those of air blower 100 of the above-described embodiment can be obtained, and the amount of air blown into more compartments can be adjusted.

The size of the plurality of shielding portions 30 is not limited, and may be the same or different, and may be set as appropriate according to the sectional size of the air blowing duct, the required air blowing amount, and the like.

(embodiment mode 2)

Fig. 8 is a partially enlarged view showing an air blowing device according to embodiment 2 of the present invention. The air blower of the second embodiment differs from the first embodiment in that the guide portion 40 is not formed by a plurality of independent shaft portions, but is formed by 2 plate-

like members

45, 46 positioned on both the left and right sides of the upper shield portion 31 and the lower shield portion 32.

The 2 plate-

like members

45 and 46 are provided on the first support body 11 or the second support body 12 so as to stand on the support surface of the first support body 11 or the second support body 12, and are located between the end portions of the upper shield portion 31 and the lower shield portion 32. The upper and lower end edges of the 2 plate-

like members

45, 46 are engaged with both end edges of the upper shield 31 and the lower shield 32, respectively. Thus, the 2 plate-

like members

45, 46 can support the upper shield portion 31 and the lower shield portion 32, and the upper shield portion 31 and the lower shield portion 32 can be moved along the end edges of the 2 plate-

like members

45, 46.

According to the blower device of embodiment 2, since the guide portion 40 is constituted by the 2 plate-

like members

45 and 46 positioned on both the left and right sides of the upper shield portion 31 and the lower shield portion 32, it is possible to prevent side leakage and achieve excellent sealing performance.

The present invention is not limited to the guide portion 40 being constituted by only the plate-like member or only the shaft portion, and the guide portion 40 may be constituted by appropriately combining the plate-like member 45 and the

shaft portions

47 and 48 as necessary as in the modification shown in fig. 9, for example.

The guide portion 40 is not limited to being formed by a plurality of separate members, and 2 plate-

like members

45, 46 or the plate-like member 45 may be formed integrally with the

shaft portions

47, 48, and the upper shield portion 31 and the lower shield portion 32 may be moved and supported by opening corresponding portions in the upper shield portion 31 and the lower shield portion 32. This can further prevent air leakage and realize excellent sealing performance.

The air blowing device of the present invention is not limited to the use in a refrigerator, and may be applied to a device having an air blowing duct and requiring adjustment of the amount of air blown to each air blowing duct.

While the invention has been specifically described above in connection with the drawings and examples, it will be understood that the above description is not intended to limit the invention in any way. Those skilled in the art can make modifications and variations to the present invention as needed without departing from the true spirit and scope of the invention, and such modifications and variations are within the scope of the invention.

Claims

1. An air supply device, comprising:

a housing having at least one air inlet and a plurality of air outlets;

a fan disposed in the housing, capable of sucking air into the housing through the air inlet and discharging the air through the air outlet;

a plurality of shielding portions that are provided corresponding to the plurality of outlets, respectively, and that open and close the outlets;

a guide portion fixed in the housing for supporting and guiding the shielding portion; and

and a driving unit that drives the shielding unit to move the shielding unit along the guide unit within the housing to open and close the outlet.

2. The air supply apparatus of claim 1, wherein:

the fan is a centrifugal fan, and the plurality of shielding portions are arranged on the outer periphery of the fan so as to surround the air outlet surface of the fan.

3. The air supply apparatus as claimed in claim 1 or 2, wherein:

and a wind guide part for guiding the gas flowing to the wind outlet is arranged in the shell.

4. The air supply apparatus as claimed in claim 1 or 2, wherein:

the plurality of shielding portions are respectively formed to be movable independently of each other.

5. The air supply apparatus as claimed in claim 1 or 2, wherein:

a rack portion is formed at one end of the shielding portion,

the driving portion is a stepping motor having an output gear, and drives the shielding portion by engaging the output gear with the rack portion of the shielding portion.

6. The air supply apparatus as claimed in claim 1 or 2, wherein:

the housing is composed of a first support body and a second support body disposed opposite to each other,

the drive unit moves the shielding unit along the guide unit between the first support body and the second support body.

7. The air supply apparatus of claim 6, wherein:

a protrusion protruding toward the first support is formed on the second support, and the fan is fixed to the protrusion,

the driving unit opens the outlet by moving the shielding unit to the protruding unit side along the guide unit, and closes the outlet by moving the shielding unit to the first support unit side along the guide unit.

8. The air supply apparatus of claim 6, wherein:

the guide portion includes a shaft portion provided on the first support body or the second support body so as to stand on a support surface of the first support body or the second support body, and the shielding portion is movable along the shaft portion.

9. The air supply apparatus of claim 6, wherein:

the guide portion includes a plate-like object that is provided on the first support body or the second support body so as to stand on a support surface of the first support body or the second support body, and that is located between end portions of the plurality of shielding portions, and the shielding portions are movable along end edges of the plate-like object.

10. A refrigerator, characterized in that:

an air supply device according to any one of claims 1 to 9;

a cooling unit for cooling the gas; and

an air supply passage communicating with the compartment of the refrigerator to supply cold air to the compartment of the refrigerator,

the air inlet of the air supply device is communicated to the cooling unit and used for sucking cold air from the cooling unit, and the air outlet of the air supply device is communicated to the air supply channel.

11. The refrigerator of claim 10, wherein:

the refrigerator further comprises a control part, wherein the control part controls the driving part according to the temperatures of different chambers in the refrigerator, so that the shielding part moves for a specified amount along the guide part to adjust the opening and closing degree of the air outlet.

12. The refrigerator of claim 11, wherein:

the air outlets of the air supply device are respectively communicated to different air supply channels in the refrigerator, and the shielding parts are respectively formed to be capable of moving independently.

13. The refrigerator of claim 12, wherein:

the plurality of air outlets include:

a first air outlet communicated to an air supply channel of a refrigerating chamber of the refrigerator; and

and the second air outlet is communicated to an air supply channel of a freezing chamber of the refrigerator.

14. The refrigerator of claim 13, wherein:

when the temperature of the refrigerating chamber is controlled, the control part completely closes the second air outlet of the air supply channel communicated to the freezing chamber.

15. The refrigerator of claim 11, wherein:

the control part completely closes the plurality of air outlets during defrosting of the refrigerator.