CN214892085U - Air duct assembly and refrigeration equipment - Google Patents

Abstract

The utility model discloses a wind channel subassembly and refrigeration plant. The refrigeration equipment comprises the air channel assembly, the air channel assembly comprises a fresh-keeping module, an air channel cover plate, an air channel back plate and a fan, a fan accommodating cavity and an air channel are arranged between the air channel cover plate and the air channel back plate, the fan is arranged in the fan accommodating cavity, and the air channel assembly is provided with an air outlet communicated with the air channel; the fresh-keeping module comprises an ion generating unit, the front side of the air duct cover plate is provided with a mounting hole communicated with the air duct, and the ion generating unit penetrates through the mounting hole from the front of the air duct cover plate and extends into the air duct. The ion generating unit of the fresh-keeping module generates the odor removal and sterilization substance in the air duct, and the air outlet of the air duct assembly blows the odor removal and sterilization substance in the air duct into the compartment of the refrigeration equipment, so that the fresh-keeping effect of the refrigeration equipment is improved. Thereby the ion generating unit passes the mounting hole and assembles on the wind channel apron, and fresh-keeping module's installation and dismantlement are simple and convenient.

Description

Air duct assembly and refrigeration equipment

Technical Field

The utility model relates to a refrigeration plant field, in particular to wind channel subassembly and refrigeration plant.

Background

In the use process of the refrigerator, foods in the refrigerator are subjected to biochemical actions such as oxidation and decomposition, peculiar smell is generated in the refrigerator, and the user experience is influenced. In order to improve the fresh-keeping effect, a fresh-keeping module is arranged in the refrigerator, and deodorizing and sterilizing substances such as superoxide radical, peroxy radical, ozone, hydrogen peroxide and the like are generated through the fresh-keeping module. The air duct component blows the odor removal and sterilization substances to the compartment of the refrigerator, and the fresh-keeping effect of the refrigerator is improved through the odor removal and sterilization substances. The existing preservation module is installed in the refrigerator air duct assembly, the installation process of the preservation module is complex, the air duct assembly needs to be disassembled after being taken down from the refrigerator when the preservation module is disassembled, and the operation is complex.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a wind channel subassembly and refrigeration plant with fresh-keeping module and fresh-keeping module installation and dismantlement are convenient.

In order to achieve one of the purposes of the utility model, one embodiment of the utility model provides an air channel assembly, which comprises a front air channel cover plate, a back air channel plate and a fan arranged between the air channel cover plate and the back air channel plate, wherein a fan accommodating cavity and an air channel which are communicated are arranged between the air channel cover plate and the back air channel plate;

the air duct assembly further comprises a fresh-keeping module, the fresh-keeping module comprises an ion generating unit, a mounting hole communicated with the air duct is formed in the front side of the air duct cover plate, and the ion generating unit penetrates through the mounting hole and extends into the air duct from the front side of the air duct cover plate.

As a further improvement of an embodiment of the present invention, the fresh-keeping module further includes a control unit, a connection the control unit with the connection cable of the ion generating unit, the front side of the air duct cover plate is provided with a receiving the first receiving groove of the control unit and a receiving the second receiving groove of the ion generating unit, the mounting hole set in the rear wall of the second receiving groove.

As an embodiment of the present invention, the ion generating unit has a rear side and supports the rear wall of the second receiving groove with the spacing portion that limits the backward movement of the ion generating unit, the lateral wall of the second receiving groove is provided with a buckle and holds the front side of the ion generating unit with the buckle that limits the forward movement of the ion generating unit and hold protrudingly, the spacing portion is provided with the locating hole that the fore-and-aft direction extends, the rear wall of the second receiving groove be provided with forward projection and with locating hole complex locating pin.

As a further improvement of an embodiment of the present invention, the connection cable is connected to a portion of the ion generating unit located in the second receiving groove, and a groove wall of the first receiving groove and the second receiving groove is provided with a guide for guiding the wire groove of the connection cable.

As an embodiment of the utility model provides a further improvement, the wind channel subassembly is still including installing the fresh-keeping module apron of wind channel apron front side, fresh-keeping module apron with inject sealed chamber between the wind channel apron, fresh-keeping module is acceptd sealed intracavity.

As an embodiment of the utility model provides a further improvement, the wind channel is including setting up first wind channel and the second wind channel of acceping the chamber left and right sides at the fan, the front side of wind channel apron be provided with the communicating freezer air outlet in first wind channel and second wind channel, the top of wind channel backplate be provided with the communicating reefer air outlet in first wind channel, ion generating unit stretches into in the first wind channel, and ion generating unit is adjacent in the chamber is acceptd to the fan.

As a further improvement of an embodiment of the present invention, the fan accommodates the chamber with be provided with the vent between the wind channel, the wind channel subassembly is still including setting up shielding device between wind channel apron and the wind channel backplate, shielding device is including setting up dog, the drive of intracavity are accommodated to the fan the dog removes so that the dog is opened or is closed the actuating mechanism of vent.

As an embodiment of the utility model provides a further improvement, the wind channel backplate is in the below of wind channel apron has the water receiving portion that stretches forward, the top of water receiving portion is provided with the water receiving tank, and the rear side of wind channel backplate is provided with the outlet with the water receiving tank intercommunication, the wind channel apron with be provided with the water guide passageway between the wind channel backplate, the top of water guide passageway with the chamber intercommunication is acceptd to the fan, the bottom with the water receiving tank intercommunication.

As an embodiment of the present invention, the water receiving portion is in the left and right sides of the water receiving tank have guiding inclined planes, the guiding inclined planes are kept away from the left and right directions, one end of the water receiving tank is higher than and close to one end of the water receiving tank.

In order to realize one of the purposes of the utility model, an embodiment of the utility model provides a refrigeration plant, include the box, open or close the door body of box the wind channel subassembly, the box is inside to have the compartment, the wind channel subassembly set up in the rear side of compartment, the bottom of wind channel subassembly with be provided with the return air passageway between the diapire of compartment.

Compared with the prior art, the beneficial effects of the utility model reside in that: the ion generating unit of the fresh-keeping module generates the odor removal and sterilization substance in the air duct, and the air outlet of the air duct assembly blows the odor removal and sterilization substance in the air duct into the compartment of the refrigeration equipment, so that the fresh-keeping effect of the refrigeration equipment is improved. Thereby the ion generating unit passes the mounting hole and assembles on the wind channel apron, and fresh-keeping module's installation and dismantlement are simple and convenient.

Drawings

Fig. 1 is a schematic structural view of a front view of an air duct assembly according to an embodiment of the present invention;

fig. 2 is a schematic rear view of an air duct assembly according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a cover plate of the air duct assembly hiding and fresh-keeping module according to an embodiment of the present invention;

FIG. 4 is an enlarged view of area A of FIG. 3;

FIG. 5 is an enlarged view of the area B in FIG. 4

Fig. 6 is a schematic structural diagram of an air duct cover plate according to an embodiment of the present invention;

FIG. 7 is an enlarged view of area C of FIG. 6;

fig. 8 is a schematic structural view of a hidden duct cover plate of the duct assembly according to an embodiment of the present invention;

FIG. 9 is an enlarged view of area D of FIG. 8;

fig. 10 is a schematic structural view of an air duct back plate according to an embodiment of the present invention;

fig. 11 is a schematic structural view of a shielding device according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a fresh-keeping module according to an embodiment of the present invention;

fig. 13 is a schematic structural view of a refrigeration apparatus according to an embodiment of the present invention;

100, an air duct assembly;

110. an air duct cover plate; 111. an air outlet of the freezing chamber; 112. a first receiving groove; 113. a second receiving groove; 1131. buckling the protrusion; 1132. positioning pins; 114. mounting holes;

120. an air duct back plate; 121. an air duct; 1211. a first air duct; 1212. a second air duct; 122. a fan accommodating cavity; 123. an air inlet; 124. an evaporator receiving chamber; 125. an air outlet of the refrigerating chamber; 126. a fan bracket; 127. a vent; 128. a water receiving part; 1281. a water receiving tank; 1282. a guide slope; 1283. a water outlet; 129. a water guide channel;

130. a fan;

140. a fresh-keeping module; 141. an ion generating unit; 1411. a limiting part; 1412. positioning holes; 142. a control unit; 143. connecting a cable;

150. a shielding device; 151. a stopper; 1511. a stopper body; 1512. a wind shield portion; 1513. a ring gear; 152. a drive mechanism; 1521. a motor; 1522. a gear;

160. a fresh-keeping module cover plate;

170. an air return section; 171. an air return channel;

200. a box body; 210. a refrigerated compartment; 220. a freezing compartment; 300. an evaporator;

Detailed Description

The present invention will be described in detail below with reference to specific embodiments shown in the drawings. However, these embodiments are not intended to limit the present invention, and structural, methodical, or functional changes that may be made by one of ordinary skill in the art based on these embodiments are all included in the scope of the present invention.

In the various figures of the present invention, certain dimensions of structures or portions are exaggerated relative to other structures or portions for ease of illustration, and thus, are used only to illustrate the basic structure of the subject matter of the present invention.

As shown in fig. 1, 2 and 3, the present invention provides an air duct assembly 100 for a refrigeration device, which includes an air duct cover plate 110, an air duct back plate 120, a fan 130 and a fresh-keeping module 140.

The duct cover 110 is disposed in front of the duct back 120, and the duct cover 110 is in front-to-back abutment with the duct back 120. The fan 130 is disposed between the duct cover 110 and the duct back 120. A cavity is disposed between the air duct cover plate 110 and the air duct back plate 120, and is used for accommodating the fan 130 and circulating air.

As shown in fig. 8, specifically, a fan accommodating cavity 122 and an air duct 121 which are communicated with each other are disposed between the air duct cover plate 110 and the air duct back plate 120, the fan 130 is disposed in the fan accommodating cavity 122, and the air duct assembly 100 has an air outlet which is communicated with the air duct 121.

As shown in fig. 4, 5, 6 and 7, the fresh keeping module 140 includes an ion generating unit 141, a mounting hole 114 communicating with the air duct 121 is formed at the front side of the air duct cover plate 110, and the ion generating unit 141 penetrates through the mounting hole 114 from the front side of the air duct cover plate 110 and extends into the air duct 121.

The ion generating unit 141 of the fresh keeping module 140 generates odor removing and sterilizing substances such as superoxide radical, peroxyl radical, ozone, hydrogen peroxide and the like in the air duct 121. When the fan 130 operates, the odor removing and sterilizing substance in the air duct 121 is blown into the compartment of the refrigeration equipment from the air outlet, so that the fresh-keeping effect of the refrigeration equipment is improved.

When the fresh keeping module 140 is installed, the ion generating unit 141 is inserted into the installation hole 114, so that the ion generating unit 141 and the air duct cover plate 110 can be assembled. When the fresh-keeping module 140 needs to be replaced, the ion generation unit 141 and the air duct cover plate 110 can be separated without disassembling the air duct assembly 100, so that the fresh-keeping module 140 is simple and convenient to mount and dismount.

The utility model discloses an in the embodiment, the edge of wind channel apron 110 and wind channel backplate 120 all has the kink of perpendicular bending type, and the kink of wind channel apron 110 and wind channel backplate 120 passes through the buckle to connect around messenger's wind channel apron 110 and wind channel backplate 120.

An air inlet 123 communicated with the fan accommodating cavity 122 is arranged on the air duct back plate 120, and the air inlet 123 corresponds to the position of the fan 130. The duct back 120 has a portion recessed forward below the air inlet 123 to form an evaporator receiving cavity 124 for receiving an evaporator 300 of the refrigeration equipment. The bottom of the duct back plate 120 has a forwardly projecting return air portion 170, and a return air passage 171 is provided below the return air portion 170. When the fan 130 operates, the air flows along the evaporator 300 cavity, the air inlet 123, the fan accommodating cavity 122, the air duct 121, the air outlet, the front side of the air duct assembly 100, and the return air channel 171 in sequence to form an air circulation.

As shown in fig. 8 and 10, the air duct 121 further includes a first air duct 1211 and a second air duct 1212 disposed at the left and right sides of the fan accommodating cavity 122, a plurality of freezing chamber air outlets 111 are disposed at the front side of the air duct cover 110, wherein a portion of the freezing chamber air outlets 111 is communicated with the first air duct 1211, and the remaining freezing chamber air outlets 111 are communicated with the second air duct 1212. The top of the air duct back plate 120 is provided with a refrigerating chamber air outlet 125 communicated with the first air duct 1211. When the air duct assembly 100 is installed in the refrigeration appliance, the freezing chamber air outlet 111 supplies air to the freezing chamber 220 of the refrigeration appliance, and the refrigerating chamber air outlet 125 supplies air to the refrigerating chamber 210 of the refrigeration appliance. The odor-removing and freshness-retaining substance generated by the ion generating unit 141 enters the freezing compartment 220 through the freezing compartment air outlet 111 and enters the refrigerating compartment 210 through the refrigerating compartment air outlet 125.

The front side of the air duct back plate 120 has a plurality of air guiding ribs protruding forward, and the air guiding ribs form the side walls of the first air duct 1211 and the second air duct 1212. The front side of the air duct back plate 120 is further provided with a fan bracket 126, and the fan accommodating cavity 122 is formed in the fan bracket 126.

A vent 127 is disposed between the fan accommodating chamber 122 and the air duct 121. Specifically, the first air duct 1211 corresponds to two air vents 127, and one air vent 127 is adjacent to the refrigerating compartment air outlet 125. The second air channel 1212 corresponds to one of the vents 127.

As shown in fig. 8, in an embodiment of the present invention, the air duct assembly 100 further includes a shielding device 150 disposed between the air duct cover plate 110 and the air duct back plate 120. The shielding device 150 functions to open or close the ventilation opening 127 between the blower receiving chamber 122 and the air duct 121. When the ventilation opening 127 is opened, the fan housing chamber 122 communicates with the air duct 121, and the air duct assembly 100 provides cool air for the refrigeration apparatus. When the refrigeration equipment performs the defrosting operation, the shielding device 150 closes the vent 127, so as to prevent the defrosting water of the evaporator 300 and the water vapor evaporated from the defrosting water from being brought into the air duct 121 and the compartment of the refrigeration equipment, and prevent the humidity of the compartment of the refrigeration equipment from increasing.

As shown in fig. 11, the shielding apparatus 150 includes a stopper 151 disposed in the blower housing chamber 122, and a driving mechanism 152 driving the stopper 151 to move so that the stopper 151 opens or closes the vent 127.

The stopper 151 includes a stopper main body 1511 coaxial with the fan 130, a plurality of wind blocking portions 1512 extending rearward from the stopper main body 1511 and disposed around the fan 130, and a ring gear 1513 disposed at the stopper main body 1511 and coaxial with the fan 130. The number of the wind blocking portions 1512 corresponds to the number of the ventilation openings 127, and the width thereof is larger than the ventilation openings 127 to ensure that the wind blocking portions 1512 cover the ventilation openings 127.

The driving mechanism 152 includes a motor 1521 and a gear 1522 connected to an output shaft of the motor 1521. Gear 1522 is geared to gear ring 1513 of stop body 1511. When the motor 1521 is started, the driving gear 1522 rotates, and the stopper 151 is driven to rotate, so that the wind blocking portion 1512 of the stopper 151 shields or exposes the wind gap, and the fan accommodating cavity 122 is connected with or disconnected from the wind channel 121. When the evaporator 300 is defrosted, the wind blocking portion 1512 shields the vent 127 to prevent the defrosted water from entering the air duct 121 from the vent 127 after being evaporated.

In an embodiment of the present invention, the air duct assembly 100 further has a structure for guiding out the condensed water drops in the fan accommodating chamber 122 during defrosting.

As shown in fig. 8, 9 and 10, specifically, the air duct back plate 120 has a water receiving portion 128 protruding forward below the air duct cover plate 110, a water receiving tank 1281 is disposed at the top of the water receiving portion 128, a water outlet 1283 communicated with the water receiving tank 1281 is disposed at the rear side of the air duct back plate 120, a water guide channel 129 is disposed between the air duct cover plate 110 and the air duct back plate 120, the top end of the water guide channel 129 is communicated with the fan accommodating cavity 122, and the bottom end of the water guide channel 129 is communicated with the water receiving tank 1281. When the refrigeration equipment defrosts, condensed water drops in the fan accommodating cavity 122 enter the water receiving tank 1281 from the water guide channel 129 and are then discharged from the water receiving tank 1281 through the water outlet 1283, so that the phenomenon that the freshness preservation effect is reduced due to the fact that the humidity of the compartment of the refrigeration equipment is increased because of condensed water in the air duct assembly 100 is avoided.

The water receiving portion 128 has guide inclined surfaces 1282 on left and right sides of the water receiving tank 1281, and one end of the guide inclined surfaces 1282, which is far away from the water receiving tank 1281 in the left and right directions, is higher than one end of the guide inclined surfaces which is close to the water receiving tank 1281. The guide slope 1282 guides the condensed water that does not enter the water receiving chamber 1281 into the water receiving chamber 1281.

In an embodiment of the present invention, the air duct assembly 100 further includes a fresh-keeping module cover plate 160 installed at the front side of the air duct cover plate 110, a sealing cavity is defined between the fresh-keeping module cover plate 160 and the air duct cover plate 110, and the fresh-keeping module 140 is accommodated in the sealing cavity. The fresh module cover 160 prevents the fresh module 140 from being exposed to the compartments of the refrigeration equipment, thereby protecting the fresh module 140, and simultaneously preventing moisture in the compartments from entering the fresh module 140 to reduce the service life of the fresh module 140.

As shown in fig. 12, the fresh food module 140 further includes a control unit 142 and a connection cable 143. The control unit 142 is connected to the ion generation unit 141 through a connection cable 143. The control unit 142 is configured to control opening and closing of the ion generating unit 141.

Referring to fig. 3, 4, 5, 6 and 7, the control unit 142 and the connection cable 143 are disposed in front of the duct cover 110. Specifically, the front side of the duct cover 110 is provided with a first receiving groove 112 for receiving the control unit 142 and a second receiving groove 113 for receiving the ion generating unit 141, and the mounting hole 114 is provided in the rear wall of the second receiving groove 113. By arranging the first receiving groove 112 and the second receiving groove 113, the air duct assembly 100 is prevented from being too wide in the front-rear direction, thereby improving the space utilization rate.

The ion generating unit 141 has a limiting portion 1411, the rear side of which abuts against the rear wall of the second accommodating groove 113 to limit the ion generating unit 141 from moving backwards, and the side wall of the second accommodating groove 113 is provided with a latching protrusion 1131 for latching the front side of the ion generating unit 141 to limit the ion generating unit 141 from moving forwards. The ion generating unit 141 is fixed in the second receiving groove 113 through the stopper 1411 and the latching protrusion 1131, and is easy and convenient to mount.

The stopper 1411 is provided with a positioning hole 1412 extending in the front-rear direction, and the rear wall of the second receiving groove 113 is provided with a positioning pin 1132 protruding forward and engaged with the positioning hole 1412. The positioning hole 1412 cooperates with the positioning pin 1132 to position the ion generating unit 141 during installation of the ion generating unit 141, and after the ion generating unit 141 is assembled, the cooperation of the positioning hole 1412 with the positioning pin 1132 may restrict the ion generating unit 141 from moving in a direction perpendicular to the front-rear direction.

The connection cable 143 is connected to a portion of the ion generating unit 141 located in the second housing groove 113, and a groove wall of the first housing groove 112 and the second housing groove 113 is provided with a wire groove for guiding the connection cable 143. Only the ion generating unit 141 of the fresh keeping module 140 partially penetrates through the air duct cover plate 110, and the control unit 142 and the ion generating unit 141 are both arranged in front of the air duct cover plate 110, so that the fresh keeping module 140 is convenient to mount and dismount.

The ion generating unit 141 extends into the first air passage 1211, and the ion generating unit 141 is adjacent to the blower receiving cavity 122. Further, the ion generating unit 141 is adjacent to the vent 127. When the ion generating unit 141 is operated, the odor removing and sterilizing substance generated by the ion generating unit 141 is diffused from the first air channel 1211 to between the fan blades of the fan 130, and the fan 130 blows the odor removing and sterilizing substance to the second air channel 1212 when being started. Therefore, the air outlet corresponding to the first air duct 1211 and the air outlet corresponding to the second air duct 1212 can both blow out the air containing the odor removing and sterilizing substance, thereby improving the fresh-keeping capability.

As shown in fig. 13, the present invention further provides a refrigeration device, which includes a box 200, a door opening or closing the box 200, a refrigeration system, and the air duct assembly 100 of the above embodiment. The cabinet 200 has a compartment therein, the duct assembly 100 is disposed at the rear side of the compartment, and a return air passage is disposed between the bottom of the duct assembly 100 and the bottom wall of the compartment.

Further, the compartments inside the cabinet 200 include a refrigerating compartment 210 and a freezing compartment 220 disposed below the refrigerating compartment 210, and the refrigerating compartment 210 and the freezing compartment 220 are separated by a partition. The duct assembly 100 is positioned behind the freezer compartment 220. The air outlet 111 of the freezing chamber of the air duct assembly 100 is communicated with the freezing chamber 220, and the air outlet 125 of the refrigerating chamber is communicated with the refrigerating chamber 210.

The refrigeration system includes a compressor, a condenser, a throttling device, and an evaporator 300, which are connected in sequence by pipes and form a refrigeration circuit. A refrigerant flows through the refrigeration circuit. The evaporator 300 is disposed in the evaporator receiving chamber 124 at the rear side of the air duct assembly 100. When the refrigeration loop works, the refrigerant is compressed into high-temperature and high-pressure gas by the compressor and then enters the condenser for heat exchange to form a medium-temperature and high-pressure liquid refrigerant. The liquid refrigerant passes through the throttling device, throttles and reduces the pressure, then the refrigerant enters the evaporator 300 to exchange heat and gasify, the evaporator 300 reduces the temperature of the gas in the evaporator accommodating cavity 124, and finally the gaseous refrigerant returns to the compressor to complete the refrigeration cycle. The throttling device is a capillary tube or an expansion valve.

The refrigerating equipment of the utility model is equipment for refrigerating or freezing articles such as refrigerators, wine cabinets, freezers and the like.

The above list of details is only for the practical implementation of the present invention, and they are not intended to limit the scope of the present invention, and all equivalent implementations or modifications that do not depart from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. An air duct assembly comprises an air duct cover plate, an air duct back plate and a fan, wherein the air duct cover plate and the air duct back plate are in front-back butt joint;

the air duct assembly is characterized by further comprising a fresh-keeping module, the fresh-keeping module comprises an ion generating unit, a mounting hole communicated with the air duct is formed in the front side of the air duct cover plate, and the ion generating unit penetrates through the mounting hole from the front side of the air duct cover plate and extends into the air duct.

2. The air duct assembly according to claim 1, wherein the fresh keeping module further comprises a control unit and a connection cable for connecting the control unit and the ion generating unit, a first receiving slot for receiving the control unit and a second receiving slot for receiving the ion generating unit are disposed on a front side of the air duct cover plate, and the mounting hole is disposed on a rear wall of the second receiving slot.

3. The air duct assembly according to claim 2, wherein the ion generating unit has a limiting portion having a rear side abutting against a rear wall of the second receiving groove to limit the backward movement of the ion generating unit, a side wall of the second receiving groove is provided with a retaining protrusion retaining a front side of the ion generating unit to limit the forward movement of the ion generating unit, the limiting portion is provided with a positioning hole extending in a front-rear direction, and the rear wall of the second receiving groove is provided with a positioning pin protruding forward and engaged with the positioning hole.

4. The air duct assembly according to claim 2, wherein the connection cable is connected to a portion of the ion generating unit located in the second receiving groove, and a groove wall of the first receiving groove and the second receiving groove is provided with a wire guiding groove for guiding the connection cable.

5. The air duct assembly of claim 1, further comprising a fresh module cover plate mounted to a front side of the air duct cover plate, wherein a sealed cavity is defined between the fresh module cover plate and the air duct cover plate, and the fresh module is received in the sealed cavity.

6. The air duct assembly according to claim 1, wherein the air duct includes a first air duct and a second air duct disposed on left and right sides of the fan housing chamber, a freezer air outlet communicated with the first air duct and the second air duct is disposed on a front side of the air duct cover plate, a refrigerator air outlet communicated with the first air duct is disposed on a top of the air duct back plate, the ion generating unit extends into the first air duct, and the ion generating unit is adjacent to the fan housing chamber.

7. The air duct assembly according to claim 1, wherein a vent is disposed between the fan receiving cavity and the air duct, the air duct assembly further comprises a shielding device disposed between the air duct cover plate and the air duct back plate, the shielding device comprises a stopper disposed in the fan receiving cavity, and a driving mechanism for driving the stopper to move so as to open or close the vent.

8. The air duct assembly according to claim 7, wherein the air duct back plate has a water receiving portion protruding forward below the air duct cover plate, a water receiving groove is formed in a top of the water receiving portion, a water outlet communicated with the water receiving groove is formed in a rear side of the air duct back plate, a water guide channel is formed between the air duct cover plate and the air duct back plate, a top end of the water guide channel is communicated with the fan accommodating cavity, and a bottom end of the water guide channel is communicated with the water receiving groove.

9. The air duct assembly according to claim 8, wherein the water receiving portion has guide slopes on left and right sides of the water receiving groove, and an end of the guide slope, which is far from the water receiving groove in the left-right direction, is higher than an end of the guide slope, which is close to the water receiving groove.

10. Refrigeration equipment is characterized by comprising a box body, a door body for opening or closing the box body and an air duct assembly as claimed in any one of claims 1 to 9, wherein a compartment is arranged in the box body, the air duct assembly is arranged on the rear side of the compartment, and a return air channel is arranged between the bottom of the air duct assembly and the bottom wall of the compartment.

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