CN216868909U

CN216868909U - Double-fan polar freezing air duct and refrigerator

Info

Publication number: CN216868909U
Application number: CN202122345787.3U
Authority: CN
Inventors: 张鑫; 王士生; 刘杰
Original assignee: Hefei Snowky Electric Co Ltd
Current assignee: Hefei Snowky Electric Co Ltd
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-07-01
Anticipated expiration: 2031-09-27

Abstract

The utility model provides a double-fan polar freezing air duct and a refrigerator, wherein the double-fan polar freezing air duct comprises air ducts arranged among a refrigerating chamber, a polar freezing chamber and a freezing chamber, and the air ducts comprise a first air duct communicated with the freezing chamber, a second air duct communicated with the refrigerating chamber and a third air duct communicated with the polar freezing chamber; a centrifugal fan is arranged at the intersection of the first air channel and the second air channel, and an axial flow fan is arranged at the third air channel; when the extreme freezing chamber does not start the extreme freezing function, the centrifugal air is started and runs at a high rotating speed, the axial flow fan is closed, when the extreme freezing chamber starts the extreme freezing function, the second air duct is closed, the centrifugal fan is started and runs at a low rotating speed, and the axial flow fan is started and runs at a high rotating speed; the refrigerator is provided with the double-fan extreme freezing air duct. The utility model can not only meet the normal refrigeration requirement of the refrigerator, but also realize the rapid cooling of the extreme freezing chamber.

Description

Double-fan polar freezing air duct and refrigerator

Technical Field

The utility model belongs to the technical field of refrigerators, and particularly relates to a double-fan polar freezing air duct.

Background

Publication No. CN111678286A, entitled "refrigerator and quick-freezing method of refrigerator", discloses a technical scheme that a single fan realizes quick-freezing (extremely-freezing) chamber quick-freezing, and the air cooled by an evaporator is controlled by utilizing an air door assembly to completely enter the quick-freezing chamber so as to realize the quick-freezing function. But still has certain improvement space on quick-freezing effect and quick-freezing duration.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide the double-fan polar freezing air duct capable of quickly cooling the polar freezing chamber.

A double-fan extreme freezing air duct comprises air ducts arranged among a refrigerating chamber, an extreme freezing chamber and a freezing chamber, wherein each air duct comprises a first air duct communicated with the freezing chamber, a second air duct communicated with the refrigerating chamber and a third air duct communicated with the extreme freezing chamber; a centrifugal fan is arranged at the intersection of the first air duct and the second air duct, and an axial flow fan is arranged at the third air duct; when the extreme freezing chamber is not opened and the extreme function is frozen, centrifugal wind starts and high rotational speed operation, and axial fan closes, and when the extreme freezing chamber is opened and the extreme function is frozen, the second wind channel is closed, and centrifugal fan starts and low rotational speed operation, and axial fan starts and high rotational speed operation.

The utility model also provides a refrigerator which is provided with the double-fan extreme freezing air duct.

The utility model utilizes the arrangement of the double fans in the air duct, and can meet the normal refrigeration requirement of the refrigerator and realize the rapid cooling of the extremely frozen chamber according to the opening, closing and rotating speed of the fans, and has the advantages of convenient control, rapid quick freezing speed and stable performance.

Additional features and advantages of the utility model will be set forth in the detailed description which follows.

Drawings

FIG. 1 is a schematic view of the mounting structure of the present invention;

FIG. 2 is a schematic structural view of an air duct according to the present invention;

FIG. 3 is a schematic view of an exploded structure of the air duct of the present invention;

FIG. 4 is a schematic view of the structure of the cover plate of the air duct of the present invention;

fig. 5 is a schematic view of the installation structure of the drawer according to the present invention.

Detailed Description

Referring to fig. 1 and fig. 2, the dual-fan polar freezing air duct provided in this embodiment includes an air duct 400 disposed between a refrigerating compartment 100, a polar freezing compartment 200, and a freezing compartment 300, and referring to fig. 3, the air duct 400 includes a first air duct 401 communicated with the freezing compartment 300, a second air duct 402 communicated with the refrigerating compartment 100, and a third air duct 403 communicated with the polar freezing compartment 200, in order to solve the technical problem described in the background art, in the technical solution of this embodiment, a centrifugal fan 501 is disposed at an intersection of the first air duct 401 and the second air duct 402, and an axial flow fan 502 is disposed at the third air duct 403; when the extreme freezing function is not started in the extreme freezing chamber 200, the centrifugal fan 501 is started and operates at a high rotating speed, the axial flow fan 502 is closed, when the extreme freezing function is started in the extreme freezing chamber 200, the second air duct 402 is closed, the centrifugal fan 501 is started and operates at a low rotating speed, and the axial flow fan 502 is started and operates at a high rotating speed.

The principle is as follows: when the extreme freezing function of the extreme freezing chamber 200 is turned off, the centrifugal fan 501 operates at a rotation speed required by normal refrigeration, and air cooled by the evaporator is respectively distributed into the freezing chamber 300, the refrigerating chamber 100 and the extreme freezing chamber 200 from the first air duct 401, the second air duct 402 and the third air duct 403, and the extreme freezing chamber 200 is a common refrigeration chamber; when the extreme freezing function of the extreme freezing chamber 200 is turned on, the second air duct 402 is closed, the air cooled by the evaporator does not enter the refrigerating chamber 100 at this time, the centrifugal fan 501 operates at a low rotation speed, so that the internal air pressure of the first air duct 401 is reduced, the cooled air enters the freezing chamber 300 in a small amount, and simultaneously, due to the fact that the axial flow fan 502 is started and operates at a high rotation speed, most of the cold air is brought into the extreme freezing chamber 200 by the axial flow fan 502, wherein the purpose of utilizing the low rotation speed operation of the centrifugal fan 501 is to obtain a lower air temperature cooled by the evaporator, and the purpose of starting and operating at the high rotation speed of the axial flow fan 502 is to enable the extreme freezing chamber 200 to obtain a higher air speed, and the fast freezing of articles such as food materials and the like in the extreme freezing chamber 200 can be realized by using the lower temperature and the higher air speed.

Through the experiments, the method has the advantages that,

when the extreme freezing chamber 200 is not opened for the extreme freezing function, the centrifugal fan 501 is started and runs at a high rotating speed, the axial flow fan 502 is closed, and the air temperature cooled by the evaporator is as follows:

it can be judged from the above table that the lower the rotational speed of the centrifugal fan, the lower the temperature of the air cooled by the evaporator;

when the extremely freezing chamber 200 is opened and extremely freezes the function, centrifugal fan 501 starts and low rotational speed operation, axial fan 502 starts and high rotational speed operation, and the air cooling time through the evaporator cooling is:

it can be determined from the above table that the lower the rotational speed of the centrifugal fan, the lower the temperature of the air cooled by the evaporator, and the faster the cooling time of the air cooled by the evaporator under the condition of high rotational speed of the axial flow fan.

Example 1

In this embodiment, the air duct 400 includes an air duct bottom plate 410 and an air duct cover plate 420 adapted to the air duct bottom plate 410, the first air duct 401 is disposed along a length direction of the air duct bottom plate 410, the air outlet is located at a top end of the air duct bottom plate 410, the second air duct 402 is disposed along a width direction of the air duct bottom plate 410, the air outlet is located at a bottom side end of the air duct bottom plate 410, the first air duct 401 and the second air duct 402 intersect at a middle portion of the air duct bottom plate 410, the centrifugal fan 501 is disposed at the intersection, the third air duct 403 is disposed through the air duct bottom plate 410 along a thickness direction, the air outlet is located at a back side of the air duct bottom plate 410, an induced draft cover 404 is disposed on the air outlet, an induced draft opening 405 close to the centrifugal fan 501 is formed between the air outlet and the induced draft cover 404, and the axial flow fan 502 is disposed at the induced draft opening 405. In the prior art, the air duct structure and the layout design of the two fans are adopted according to the arrangement mode of the refrigerating chamber 100, the extreme freezing chamber 200 and the freezing chamber 300 of the refrigerator, so that the distribution of wind direction and wind quantity can be effectively controlled, and the axial flow fan 502 is arranged at the air induction port 405, so that the extreme freezing chamber 200 can obtain high wind speed, and the rapid realization of the extreme freezing function is ensured.

Example 2

In this embodiment, on the basis of embodiment 1, referring to fig. 4, the air duct cover plate 420 is disposed along the periphery of the centrifugal fan 501 at the intersection between the first air duct 401 and the second air duct 402 in an archimedean spiral shape, and is disposed in an involute shape in the direction from the archimedean spiral shape toward the first air duct 401. The purpose is to reduce the air loss of the centrifugal fan 501, so that the first air duct 401 and the second air duct 402 can obtain larger air volume at the same rotation speed of the centrifugal fan 501.

Example 3

In this embodiment, on the basis of embodiment 1, the top of the air duct bottom plate 410 is bent toward the rear wall of the refrigerator. The purpose is that the first air duct 401 is bent toward the rear wall of the refrigerator at a position where the first air duct 401 leads to the freezing compartment 300, so that the first air duct 401 is guided by a section of inclined surface and then enters the freezing compartment 300, more cold air can be gathered at the second air duct 402 and the third air duct 403, the cold air requirements of the extreme freezing compartment 200 and the cold storage compartment 100 are met, and the rapid implementation of the extreme freezing function can be further ensured.

Example 4

In this embodiment, referring to fig. 5, a drawer 201 is disposed in the super-freezing chamber 200, a first cold air flow channel 202 is formed inside the drawer 201, a second cold air flow channel 203 is formed between the drawer 201 and the bottom of the super-freezing chamber 200, a first opening 204 leading to the first cold air flow channel 202 and a second opening 205 leading to the second cold air flow channel 203 are disposed on the third air duct 403, and a return air inlet 206 communicating with the first cold air flow channel 202 and the second cold air flow channel 204 is disposed at the front end of the bottom of the super-freezing chamber 200. The purpose is that the upper/lower surfaces of the drawer 201 are washed through the first opening 204 and the second opening 205, so that the drawer-like food and the like can be further rapidly cooled, and particularly, the bottom surface of the drawer 201 is provided with a hole, so that the function of rapid cooling can be further realized when the second opening 205 washes the bottom of the drawer; the air return opening 206 arranged at the front end of the bottom of the extreme freezing chamber 200 enables the air volume circulation of the extreme freezing chamber 200 to be smoother.

Example 5

In this embodiment, on the basis of embodiment 3, referring to fig. 5, the bottom of the drawer 201 is provided with an aluminum chassis 207 for obtaining better heat conduction effect, which can further ensure the quick implementation of the extreme freezing function.

Correspondingly, the extreme freezing method applying the double-fan extreme freezing air duct comprises the following steps:

s1, turning on the extreme freezing function of the extreme freezing chamber (for example, automatic turning on or direct manual turning on by sensor recognition can be used);

and S2, closing the second air duct, starting the centrifugal fan and running at a low rotating speed, and starting the axial flow fan and running at a high rotating speed.

Correspondingly, the refrigerator is provided with the double-fan extreme freezing air duct.

It will be evident to those skilled in the art that the utility model is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the utility model being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a double fan utmost point wind channel that freezes, is including setting up at the room between cold-stored, extremely freezing room and freezing wind channel between the room, the wind channel include with freezing room first wind channel that communicates, with cold-stored second wind channel that communicates with each other of room and extremely freezing the communicating third wind channel of room, its characterized in that: a centrifugal fan is arranged at the intersection of the first air duct and the second air duct, and an axial flow fan is arranged at the third air duct; when the extreme freezing chamber is not opened and the extreme function is frozen, centrifugal wind starts and high rotational speed operation, and axial fan closes, and when the extreme freezing chamber is opened and the extreme function is frozen, the second wind channel is closed, and centrifugal fan starts and low rotational speed operation, and axial fan starts and high rotational speed operation.

2. The double-fan extreme frozen air duct of claim 1, characterized in that: the air channel comprises an air channel bottom plate and an air channel cover plate matched with the air channel bottom plate, a first air channel is arranged along the length direction of the air channel bottom plate, an air outlet is located at the top end of the air channel bottom plate, a second air channel is arranged along the width direction of the air channel bottom plate, the air outlet is located at the bottom side end of the air channel bottom plate, the first air channel and the second air channel are intersected in the middle of the air channel bottom plate, the centrifugal fan is arranged at the intersection position of the first air channel and the second air channel, a third air channel penetrates through the third air channel along the thickness direction of the air channel bottom plate, the air outlet is located at the back of the air channel bottom plate, an induced draft cover is arranged on the air outlet, an induced draft opening close to the centrifugal fan is formed between the air outlet and the induced draft cover, and the axial flow fan is arranged at the induced draft opening.

3. The double-fan extremely-frozen air duct of claim 2, characterized in that: the air duct cover plate is arranged along the periphery of the centrifugal fan in an Archimedes spiral line shape at the intersection position corresponding to the first air duct and the second air duct, and is arranged in an involute line shape at the Archimedes spiral line shape towards the first air duct.

4. The double-fan extreme frozen air duct according to claim 2 or 3, characterized in that: the top of the air duct bottom plate is bent towards the rear wall of the refrigerator.

5. The double-fan extreme frozen air duct of claim 1, characterized in that: the utility model discloses a refrigerator, including utmost point freezer room, drawer, third wind channel, second wind channel, first air conditioning flow channel, the utmost point freezer room is equipped with the drawer in the utmost point freezer room, and drawer inside constitutes first air conditioning flow channel, constitutes second air conditioning flow channel between the bottom of drawer and utmost point freezer room, is equipped with the first opening that leads to first air conditioning flow channel on the third wind channel to and lead to the second opening of second air conditioning flow channel, and the bottom front end of utmost point freezer room is equipped with the communicating return air inlet with first air conditioning flow channel and second air conditioning flow channel.

6. The double-fan extremely-frozen air duct of claim 5, characterized in that: the bottom surface of the drawer is provided with a hole communicated with the second cold air flow channel.

7. The double-fan extremely-frozen air duct of claim 5, characterized in that: an aluminum chassis is arranged at the bottom of the drawer.

8. A refrigerator, characterized in that: a double fan ultra-frozen air duct according to any one of claims 1 to 7 is installed.