CN116357616A

CN116357616A - Fan and refrigerator

Info

Publication number: CN116357616A
Application number: CN202310199918.2A
Authority: CN
Inventors: 郑皓宇; 张书锋; 李大伟; 张强; 刘建伟
Original assignee: Qingdao Haier Special Refrigerator Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Special Refrigerator Co Ltd; Haier Smart Home Co Ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-06-30

Abstract

The application relates to the technical field of refrigeration equipment and discloses a fan, which comprises a volute tongue component and a wind wheel arranged in the volute tongue component. The volute tongue component comprises a first volute, a first volute tongue, a second volute and a second volute tongue. The first volute and the first volute tongue are enclosed to form a first fan air outlet. The second volute and the second volute tongue are enclosed to form a second fan air outlet. The wind wheel center and the first volute tongue form a first auxiliary connecting line, the wind wheel center and the second volute tongue form a second auxiliary connecting line, and an included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 90 degrees and smaller than 180 degrees. Through setting the contained angle between first auxiliary connection line and the second auxiliary connection line to be greater than 90 and less than 180, the air supply channel of cooperation freezer realizes the accurate control to the air supply volume of inner space to reduce the temperature difference in different positions in the freezer, promote the samming nature of freezer, improve the forced air cooling effect of freezer. The application also discloses a refrigerator.

Description

Fan and refrigerator

Technical Field

The application relates to the technical field of refrigeration equipment, for example, to a fan and a refrigerator.

Background

At present, a refrigerating apparatus is widely used for storing articles at a low temperature, for example, a refrigerator, a freezer, etc. According to the refrigeration principle, the refrigerator is generally divided into a direct-cooling refrigerator and an air-cooling refrigerator. For a direct-cooling refrigerator, the temperature of the top in the refrigerator body is higher due to the influence of factors such as a used glass door, poor air circulation in the refrigerator body and the like; to the forced air cooling freezer, the influence of the setting position of the internal wind gap of cabinet makes the internal temperature of cabinet receive the wind circulation influence great, and the temperature that is close to wind gap department is lower, and the temperature of keeping away from wind gap department is higher.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:

in the related art, the temperature difference of different positions in the cabinet body of the refrigerator is larger, and the problems that the temperature uniformity in the cabinet body is poor, the refrigeration efficiency of the refrigerator is influenced and the energy consumption is higher exist.

Disclosure of Invention

The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.

The embodiment of the disclosure provides a fan and a refrigerator to reduce the temperature difference of different positions in the refrigerator, promote the samming nature of refrigerator, improve the forced air cooling effect of refrigerator, reduce the energy consumption.

In some embodiments, a fan includes a volute tongue assembly and a wind wheel disposed within the volute tongue assembly. The volute tongue component comprises a first volute, a first volute tongue, a second volute and a second volute tongue. The first volute and the first volute tongue are enclosed to form a first fan air outlet. The second volute and the second volute tongue are enclosed to form a second fan air outlet. The wind wheel center and the first volute tongue form a first auxiliary connecting line, the wind wheel center and the second volute tongue form a second auxiliary connecting line, and an included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 90 degrees and smaller than 180 degrees.

Optionally, an angle between the first auxiliary connection line and the second auxiliary connection line is greater than 100 ° and less than or equal to 140 °. Or, the included angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 130 degrees and less than or equal to 140 degrees. Alternatively, the included angle between the first auxiliary connection line and the second auxiliary connection line is greater than 170 ° and less than 180 °.

In some embodiments, the refrigerator includes a liner and a blower. The inner container encloses out the inner space, and the inner container includes first lateral wall, and first lateral wall is provided with first air supply wind channel and second air supply wind channel. And the fan comprises a first fan air outlet communicated with the first air supply duct and a second fan air outlet communicated with the second air supply duct. Wherein, the fan is above-mentioned fan.

Optionally, the first air supply duct is disposed at an upper portion of the first side wall, and the second air supply duct is disposed at a lower portion of the first side wall. The included angle between a second auxiliary connecting line formed by the center of the wind wheel and the second volute tongue and a vertical line is larger than or equal to 20 degrees and smaller than or equal to 60 degrees. Or, an included angle between a second auxiliary connecting line formed by the wind wheel center and the second volute tongue and a vertical line is larger than or equal to 20 degrees and smaller than or equal to 40 degrees.

Optionally, the first air supply duct includes a first diffuser duct directly connected to the air outlet of the first fan, and a first pressure stabilizing duct connected to the first diffuser duct. The second air supply duct comprises a second diffusion section duct which is directly communicated with the air outlet of the second fan, and a second pressure stabilizing section duct which is communicated with the second diffusion section duct. The total area of the air supply opening of the air duct of the first pressure stabilizing section is larger than that of the air supply opening of the air duct of the second pressure stabilizing section.

Optionally, the first air supply duct includes a first end air supply port far away from the fan, the second air supply duct includes a second end air supply port far away from the fan, and the inner container includes a terminal side wall near the first end air supply port and the second end air supply port. The horizontal distance between the first tail end air supply opening and the tail end side wall is a first tail end distance, the horizontal distance between the second tail end air supply opening and the tail end side wall is a second tail end distance, and the first tail end distance is smaller than the second tail end distance.

Optionally, the difference between the first end spacing and the second end spacing is greater than or equal to the length of one air supply port of the first air supply duct. Or the difference between the first end spacing and the second end spacing is greater than or equal to the length of one air supply port of the second air supply duct.

Optionally, the refrigerator further comprises a return air cover plate, an evaporator and a compressor. The return air apron is located the inner space to separate the inner space into storing chamber and evaporimeter chamber, the export in evaporimeter chamber is linked together with the entry in first air supply wind channel and second air supply wind channel, and the return air apron is equipped with the return air inlet, and the air current in the storing chamber can flow into the evaporimeter intracavity through the return air inlet. The evaporator is arranged in the evaporator cavity. And a compressor disposed at a lower portion of the evaporator chamber.

Optionally, the refrigerator further comprises a press cavity step. The step of the press cavity is arranged to be protruded upwards from the bottom wall of the inner container and is arranged at the lower part of the return air cover plate, and the step of the press cavity and the bottom wall of the inner container are enclosed together to form a press cavity for placing the compressor.

Optionally, the relationship between the total volume V of the evaporator and the total area S of the return air inlet is: ys=v, where y is greater than or equal to 50 and less than or equal to 1000.

The fan and the refrigerator provided by the embodiment of the disclosure can realize the following technical effects:

the refrigerator provided by the embodiment of the disclosure comprises an inner container and a fan. The inner container encloses and closes out the inner space, is provided with first air supply wind channel and second air supply wind channel on the first lateral wall of inner container, can provide the refrigeration air current for the inner space that the inner container encloses out to reduce the temperature of inner space. The fan comprises a volute tongue component and a wind wheel arranged in the volute tongue component. A first volute and a first volute tongue in the volute tongue assembly are surrounded to form a first fan air outlet, and a second volute tongue are surrounded to form a second fan air outlet. And the first air supply duct and the second air supply duct on the first side wall of the inner container are respectively communicated with the first fan air outlet and the second fan air outlet of the fan. Under the drive of the fan, the refrigerating air flow enters the inner container through the first air supply air duct and the second air supply air duct to enclose an inner space, so that the temperature of the inner space is reduced. The wind wheel center and the first volute tongue form a first auxiliary connecting line, and the wind wheel center and the second volute tongue form a second auxiliary connecting line. Through setting the contained angle between first auxiliary connection line and the second auxiliary connection line to be greater than 90 and less than 180, make the fan can carry out accurate control to different wind channel air supply volume, and then cooperate first air supply wind channel and second air supply wind channel to realize the accurate control to the air supply volume of inner space to reduce the temperature difference in different positions in the freezer, promote the samming nature of freezer, improve the forced air cooling effect of freezer, reduce the energy consumption.

The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.

Drawings

One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:

fig. 1 is a schematic view of a refrigerator according to an embodiment of the present disclosure;

FIG. 2 is a schematic view of a liner and return air cover in accordance with an embodiment of the present disclosure;

FIG. 3 is a schematic view of a liner mated with an evaporator set according to an embodiment of the present disclosure;

FIG. 4 is a schematic cross-sectional view of a liner and evaporator set according to an embodiment of the present disclosure;

FIG. 5 is a schematic view of a return air cover plate mated with an evaporator set according to an embodiment of the present disclosure;

FIG. 6 is a schematic view of another return air cover plate mated with an evaporator set provided in an embodiment of the present disclosure;

fig. 7 is a schematic structural view of the positional relationship of two evaporators provided by an embodiment of the present disclosure;

FIG. 8 is a schematic diagram of a configuration of two evaporators mated as provided by an embodiment of the present disclosure;

FIG. 9 is a schematic view of another return air cover plate mated with an evaporator set provided in an embodiment of the present disclosure;

FIG. 10 is a schematic diagram of a fan and air duct configuration according to an embodiment of the present disclosure;

FIG. 11 is a schematic diagram of a blower provided in an embodiment of the present disclosure;

fig. 12 is a schematic structural view of another fan provided in an embodiment of the present disclosure.

Reference numerals:

1: an inner container; 11: a first sidewall; 111: a first air supply duct; 1111: the first diffusion section air duct; 1112: the first pressure stabilizing section air duct; 1113: a first air duct air supply outlet; 112: a second air supply duct; 1121: the second diffusion section air duct; 1122: the second pressure stabilizing section air duct; 1123: a second air duct air supply outlet; 12: a second sidewall; 13: a bottom wall; 14: a press cavity step; 15: an air supply port;

2: a return air cover plate; 21: a first cover plate portion; 211: a first return air inlet; 2111: a first return air part; 2112: a return air guide plate; 22: a second cover plate portion; 221: a second return air inlet;

3: an evaporator group; 31: a first evaporator; 311: a first edge; 312: a second edge; 313: a third edge; 314: a first heat exchange tube group; 315: a first heating tube group; 316: a first heat conduction fin group; 32: a second evaporator; 321: a second heat exchange tube group; 322: a second heating tube group; 323: a second heat conduction fin group; 33: a communicating pipe; 331: a first bent tube section; 332: a second bent tube section;

4: a compressor;

5: a blower; 51: a wind wheel; 511: the center of the wind wheel; 52: a volute tongue assembly; 521: a first volute; 522: a first volute tongue; 523: a second volute; 524: a second volute tongue; 53: an air outlet of the first fan; 54: an air outlet of the second fan;

6: a case shell;

7: a door body;

a: the length of the first edge; c: the length of the second edge;

l: a distance between the first evaporator and the second evaporator;

m: a horizontal spacer Wen Jianju; n: vertical spacers Wen Jianju;

g: the depth of the fan volute; h: the distance between the outer side of the volute of the fan and the evaporator;

s1: the area of the first air return port; s2: the area of the second air return opening;

s: the total area of all the air return openings; v: the total volume of all evaporator groups;

l1: a first auxiliary connection line; l2: a first auxiliary connection line; l3: a vertical line;

d1: a first end pitch; d2: second end pitch.

Detailed Description

So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.

The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.

In the embodiments of the present disclosure, the terms "upper", "lower", "inner", "middle", "outer", "front", "rear", and the like indicate an azimuth or a positional relationship based on that shown in the drawings. These terms are used primarily to better describe embodiments of the present disclosure and embodiments thereof and are not intended to limit the indicated device, element, or component to a particular orientation or to be constructed and operated in a particular orientation. Also, some of the terms described above may be used to indicate other meanings in addition to orientation or positional relationships, for example, the term "upper" may also be used to indicate some sort of attachment or connection in some cases. The specific meaning of these terms in the embodiments of the present disclosure will be understood by those of ordinary skill in the art in view of the specific circumstances.

In addition, the terms "disposed," "connected," "secured" and "affixed" are to be construed broadly. For example, "connected" may be in a fixed connection, a removable connection, or a unitary construction; may be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements, or components. The specific meaning of the above terms in the embodiments of the present disclosure may be understood by those of ordinary skill in the art according to specific circumstances.

The term "plurality" means two or more, unless otherwise indicated.

The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.

It should be noted that, without conflict, the embodiments of the present disclosure and features of the embodiments may be combined with each other.

As shown in fig. 1-9, embodiments of the present disclosure provide a refrigerator, in particular an air-cooled refrigerator, and specifically an air-cooled horizontal refrigerator. The refrigerator comprises a box body and a door body 7, wherein the door body 7 is movably positioned above the box body. The box body comprises a box shell 6, an inner container 1 and a heat insulation material, wherein the inner container 1 is positioned inside the box shell 6, and the heat insulation material is positioned between the box shell 6 and the inner container 1.

The liner 1 includes a bottom wall 13 and side walls including a front side wall, a rear side wall, a left side wall, and a right side wall. The front side wall and the rear side wall are disposed opposite to each other and are located at the front and rear ends of the bottom wall 13, respectively, and both extend upward. The left side wall and the right side wall are disposed opposite to each other, and are located at the left and right ends of the bottom wall 13, respectively, and extend upward. The bottom wall 13, the front side wall, the rear side wall, the left side wall, and the right side wall enclose an inner space together. The inner space is provided with an opening, the opening is upward, and the door body 7 is movably covered above the opening.

For convenience of description, the present application defines the front-rear direction as the width direction, and the left-right direction as the length direction.

The embodiment of the disclosure provides a refrigerator, the liner 1 includes a first side wall 11 and a second side wall 12, the first side wall 11 and the second side wall 12 are arranged along the width direction of the liner 1, and the first side wall 11 and the second side wall 12 each define an air supply duct having an air supply opening 15. Here, the first sidewall 11 and the second sidewall 12 are disposed along the width direction of the liner 1, that is, the first sidewall 11 may be a rear sidewall or a front sidewall, and the second sidewall 12 may be a front sidewall or a rear sidewall, respectively. It can be understood that: the front and rear side walls each define an air supply duct having an air supply opening 15 therein. Thus, the air outlet of the inner space can be realized, and the air cooling is further realized.

The refrigerator further comprises a return air cover plate 2, the return air cover plate 2 is located in the inner space and divides the inner space into a storage cavity and an evaporator cavity, an outlet of the evaporator cavity is communicated with an inlet of the air supply duct, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity can flow into the evaporator cavity through the return air inlet. Here, the storage chamber is used for holding articles to be frozen, such as meat, seafood, tea leaves, etc. The evaporator cavity is used for generating refrigerating air flow, the refrigerating air flow can flow from the evaporator cavity to the air supply duct, flows into the storage cavity from the air supply port 15, exchanges heat with objects in the storage cavity, flows back into the evaporator cavity for cooling again, and flows to the air supply duct for circulation after cooling. Thus, the air path circulation of the refrigerator is realized, and the air cooling refrigeration of the refrigerator is realized.

It should be noted that the return air cover plate 2 may have various shapes, such as L-shape, inclined shape, etc. The evaporator chamber can also be of various shapes and located in different locations in the interior space. For example, the evaporator cavity may be located at the left end, the middle portion or the right end of the inner space, and in practical application, the evaporator cavity and the storage cavity may be laid out according to the structure of the inner space of the refrigerator.

The refrigerator further comprises an evaporator and a fan 5, the evaporator being located in the evaporator chamber. Alternatively, the fan 5 and the air supply duct are located in the same side wall, and the fan 5 is communicated with the air supply duct. The fan 5 can drive air flow to flow through the evaporator cavity, the air supply duct and the storage cavity and then flow back to the evaporator cavity through the air return opening, so that a circulating air path is formed. Here, the evaporator is used to exchange heat with the air flow in the evaporator chamber to form a refrigerant air flow. The fan 5 provides power for the airflow. The fan 5 and the air supply duct are all located on the same side wall, so that the air flow flowing out of the fan 5 does not need to pass through a right-angle corner, the loss of the air flow can be reduced, the refrigerating effect of the refrigerator is improved, and the energy consumption is reduced.

In some embodiments, the refrigerator comprises a liner 1, a return air cover plate 2 and an evaporator. The inner container 1 encloses an inner space, and the inner container 1 defines an air supply duct having an air supply opening 15. The return air cover plate 2 is located in the inner space and divides the inner space into a storage cavity and an evaporator cavity, an outlet of the evaporator cavity is communicated with an inlet of the air supply duct, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity can flow into the evaporator cavity through the return air inlet. The evaporator is located within the evaporator cavity. The relation between the total volume V of the evaporator and the total area S of the return air inlet is as follows: ys=v, where y is greater than or equal to 50.

Referring to fig. 9, taking two evaporators and two air return openings as an example, the total volume of the two evaporators is V, the area of the first air return opening 211 is S1, the area of the second air return opening 221 is S2, and the total area S of the air return openings is the sum of the areas of the first air return opening 211 and the second air return opening 221.

Optionally, y is less than or equal to 1000.

So set up, according to actual refrigeration temperature requirement, can satisfy the relation between total volume V of evaporimeter and the total area S of return air inlet: ys=v, wherein y is less than or equal to 1000 on the premise that y is greater than or equal to 50, so that the actual refrigeration requirement of a user using the refrigerator can be met.

The return air cover plate 2 is provided with a return air inlet, when the refrigerator runs, air flow in the evaporator cavity flows into the air supply duct under the drive of the fan 5 after the temperature of the evaporator is reduced, then flows into the storage cavity through the air supply inlet 15, refrigerates articles in the storage cavity, and then flows back into the evaporator cavity through the return air inlet, so that a circulating air path of the refrigerator is formed. In the air circulation process, when the air pressure is constant and the width of the air supply duct and the area of the air supply opening 15 are sufficiently large, the size or area of the air return opening becomes one of the main factors affecting the air supply quantity in the air circulation process. In the embodiment of the disclosure, y is more than or equal to 50 and less than or equal to 1000, so that the air supply quantity of the air supply port 15 in the circulation air path of the refrigerator is improved.

It will be appreciated that the total volume V of the evaporator is in mm ³ I.e. cubic mm, the total area S of the return air opening being in mm ² I.e. square millimeters, the value of y is calculated in this unit of measure. y may be a constant without units.

Optionally, y is greater than or equal to 55 and less than or equal to 700.

In the embodiment of the disclosure, y is more than or equal to 55 and less than or equal to 700, and meanwhile, the cooling speed and the cooling depth of the refrigerator are improved. In the following, the number of evaporators in the evaporator chamber is 1 as an example.

TABLE 1

As can be seen from Table 1 above, when the length, width and height of the evaporator were 196mm, 180mm and 100mm, respectively, the volume of the evaporator was 3528000mm ³ . According to the formula yS=V, different total areas of the return air inlets are calculated to obtain different valuesy value.

In table 1, the y value of example 1 is 50, the y value of example 2 is 56, the y value of example 3 is 216, the y value of example 4 is 266, the y value of example 5 is 574, and the y value of example 6 is 985. The energy efficiency levels of the embodiment 3 and the embodiment 4 are one level, the energy efficiency levels of the embodiment 2 and the embodiment 5 are two levels, and the energy efficiency levels are obviously higher than the three-level energy efficiency levels of the embodiment 1 and the embodiment 6. Namely, when y is more than or equal to 55 and less than or equal to 700, the refrigerator can have better energy efficiency grade. Alternatively, 100.ltoreq.y.ltoreq.500.

The cooling rates of examples 1, 2, 3 and 4 were 97 minutes, 83 minutes, 90 minutes and 121 minutes, respectively, which were significantly faster than those of examples 5 and 6, as viewed in the cooling rate parameter. Further, the refrigeration depths of example 3 and example 4 were-29 ℃ and-27.6 ℃ respectively, which are significantly lower than the refrigeration depths of example 1, example 2, example 5 and example 6, as viewed in terms of refrigeration depth. The cooling speed is the time for the refrigerator to be cooled to-18 ℃ from the ambient temperature, and the refrigerating depth is the lowest temperature which the refrigerator can reach. Further, the power consumption of example 3 and example 4 was 1.03 kW.h/24 h and 1.14 kW.h/24 h, respectively, which were significantly smaller than those of example 1, example 2, example 5 and example 6, respectively, in terms of the power consumption. Alternatively, 100.ltoreq.y.ltoreq.500.

When the y values of the embodiment 3 and the embodiment 4 are 216 and 266 respectively, the refrigerator has lower refrigeration depth and lower power consumption on the basis of ensuring a certain cooling speed, and belongs to primary energy efficiency. Is significantly better than example 1, example 2, example 5 and example 6.

It will be appreciated that when y is equal to or greater than 100 and equal to or less than 500, the refrigerator can achieve the same primary energy efficiency effect as that of embodiment 3 or embodiment 4.

Optionally, the return air cover 2 includes a first cover portion 21 and a second cover portion 22. The first cover plate portion 21 is disposed in the horizontal direction. The second cover plate portion 22 is disposed in the vertical direction and is connected to the first cover plate portion 21. At least one of the first cover plate portion 21 and the second cover plate portion 22 is provided with an air return port.

As shown in fig. 2 and 5, the return air cover plate 2 includes a first cover plate portion 21 disposed along a horizontal direction and a second cover plate portion 22 disposed along a vertical direction, and the first cover plate portion 21 is connected to the second cover plate portion 22, where the first cover plate portion 21 and the second cover plate portion 22 may be detachably connected, or may be non-detachably connected. Further, at least one of the first cover plate portion 21 and the second cover plate portion 22 is provided with an air return port, so that the air flow in the refrigerator circulates when the refrigerator is in operation.

It will be appreciated that the return air cover plate 2 is provided with one or more return air openings. For example, when the number of return air inlets is one, the return air inlets are provided at the first cover plate portion 21, or the return air inlets are provided at the second cover plate portion 22. When the number of the air return openings is plural, the air return openings may be provided only in the first cover plate portion 21 or the second cover plate portion 22, or may be provided partially in the first cover plate portion 21 and partially in the second cover plate portion 22.

Optionally, the refrigerator further includes a press cavity step 14. The press cavity step 14 is arranged to be protruded upwards from the bottom wall 13 of the liner 1, comprises a vertical step plate arranged along the vertical direction and a horizontal step plate arranged along the horizontal direction, and the press cavity step 14 and the bottom wall 13 of the liner 1 are enclosed together to form a press cavity for placing the compressor 4. The vertical step plate is connected with the second cover plate part 22 of the return air cover plate 2, and at least the connection part of the vertical step plate and the second cover plate part 22 is provided with a return air inlet communicated with the evaporator cavity, and the total area S of the return air inlet is the sum of the areas of all the return air inlets.

The refrigerator needs to be provided with components such as a compressor 4 and a condenser, and therefore, the press cavity step 14 protruding upwards from the bottom wall 13 of the liner 1 comprises a vertical step plate arranged in the vertical direction and a horizontal step plate arranged in the horizontal direction, and the press cavity can be used for placing the compressor 4 together with the bottom wall 13 of the liner 1. Further, the connection of the vertical step plate and the second cover plate 22 is provided with a return air inlet communicated with the evaporator cavity, which can be used for circulating air flow in the refrigerator.

Optionally, a return air cover plate 2 is provided on top of the press cavity step 14.

It will be appreciated that the return air cover plate 2 is disposed on the upper portion of the press cavity step 14 such that the return air cover plate 2, the press cavity step 14 and the side walls of the liner 1 can enclose the evaporator cavity for placement of the evaporator. The evaporator is located above the step 14 of the pressing cavity, so that the evaporator cannot occupy the inner space of the liner 1 excessively, the storage volume of the storage cavity is guaranteed, the evaporator cavity is more compact, and the heavy feeling in the refrigerator is reduced.

Alternatively, the evaporator includes a first evaporator 31 and a second evaporator 32. The first evaporator 31 is disposed at one end of the evaporator cavity, and an included angle between the first evaporator 31 and the horizontal direction is smaller than or equal to the first angle. The second evaporator 32 is disposed at the other end of the evaporator cavity, and an included angle between the second evaporator 32 and the horizontal direction is smaller than or equal to the first angle. Wherein the total volume V of the evaporators is the sum of the volumes of the first evaporator 31 and the second evaporator 32.

By arranging the first evaporator 31 and the second evaporator 32, the first evaporator 31 is positioned at one end of the evaporator cavity, and the second evaporator 32 is positioned at the other end of the evaporator cavity, so that the refrigerating efficiency inside the refrigerator can be higher. Further, the first evaporator 31 and the second evaporator 32 are inclined at an angle smaller than or equal to the first angle with respect to the horizontal direction, so that the first evaporator 31 and the second evaporator 32 are inclined, and the first evaporator 31 and the second evaporator 32 facilitate the discharge of the defrost water. Specifically, the first angle may be 10 °, 15 °, 20 °, 25 °, 30 °. The first evaporator 31 and the second evaporator 32 are each provided with a drain port, and the first evaporator 31 and the second evaporator 32 are each inclined toward the drain port so that defrost water generated by the first evaporator 31 and the second evaporator 32 flows out of the refrigerator through the drain ports.

Optionally, the evaporator chamber includes a return air chamber located between the first evaporator 31 and the second evaporator 32, the first cover plate portion 21 is provided with a first return air inlet 211 located at the top of the return air chamber, and the second cover plate portion 22 is provided with a second return air inlet 221 located at the side of the return air chamber. Wherein, the area of the first air return opening 211 is greater than or equal to the area of the second air return opening 221.

So set up, set up the return air chamber between first evaporimeter 31 and second evaporimeter 32, the air current in the freezer can flow to the first evaporimeter 31 and the second evaporimeter 32 of both sides respectively after flowing into the return air chamber through the return air inlet like this, can avoid the air current mutual interference that flows to two evaporimeters. Further, the first air return opening 211 positioned at the top of the air return cavity and the second air return opening 221 positioned at the side surface of the air return cavity are respectively arranged at the first cover plate part 21 and the second cover plate part 22, so that the air return efficiency is higher, and the air flow circulation efficiency in the refrigerator is higher.

Optionally, the first return air inlet 211 includes a plurality of first return air portions 2111 disposed side by side. Wherein, the width of the first return air portion 2111 is less than or equal to the first width threshold, and/or the length of the first return air portion 2111 is greater than or equal to the first length threshold.

So set up, set up a plurality of first return air portions 2111 side by side at first return air inlet 211, can make the air current get into the return air intracavity through first return air inlet 211 more effectively, improve the return air efficiency of air current. Further, the width of the first return air portion 2111 may be set to be less than or equal to the first width threshold, or the length of the first return air portion 2111 may be set to be greater than or equal to the first length threshold, or the width of the first return air portion 2111 may be set to be less than or equal to the first width threshold, while the length of the first return air portion 2111 is set to be greater than or equal to the first length threshold. This can maintain a certain return air area of the first return air portion 2111, and thus ensure the return air efficiency of the entire first return air port 211.

Optionally, a return air guide 2112 is provided at an upper portion of the first return air inlet 211.

As shown in fig. 5, by providing the return air guide plate 2112 at the upper portion of the first return air inlet 211, the air flow can directly flow into the return air cavity through the drainage effect of the return air guide plate 2112, and then flow to the evaporator, so that the turbulence of the air flow is reduced.

Optionally, the liner 1 includes a first sidewall 11, and the first sidewall 11 defines an air supply duct having an air supply opening 15. Wherein, the air supply duct is internally provided with a fan 5.

So arranged, the first side wall 11 of the liner 1 defines an air supply duct having an air supply opening 15, and a fan 5 is disposed in the air supply duct. When the refrigerator operates, the temperature of the air flow in the evaporator cavity is reduced, the air flow flows into the air supply duct under the drive of the fan 5, then flows into the storage cavity through the air supply opening 15, refrigerates the articles in the storage cavity, and then flows back into the evaporator cavity through the air return opening. Therefore, the temperature of the inner space of the refrigerator can be reduced to the set temperature, so that the actual refrigeration requirement of a user is met.

In some embodiments, the refrigerator includes a liner 1, a return air cover 2, and an evaporator set 3. The inner container 1 encloses an inner space, and the inner container 1 defines an air supply duct having an air supply opening 15. The return air cover plate 2 is located in the inner space, and separates the inner space into a storage cavity and an evaporator cavity provided with an evaporator, an outlet of the evaporator cavity is communicated with an inlet of the air supply duct, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity can flow into the evaporator cavity through the return air inlet. The evaporator group 3 comprises a first evaporator 31 and a second evaporator 32 which are arranged in an evaporator cavity, and the evaporator cavity comprises a return air cavity between the first evaporator 31 and the second evaporator 32, and the distance L between the first evaporator 31 and the second evaporator 32 is as follows: l is greater than or equal to S/(a '+c'). Where S is the total area of the return air inlet, and a 'and c' are the lengths of two different positions of the return air chamber or the first evaporator 31, respectively, and at least one of the two different positions is close to the return air inlet.

As shown in connection with fig. 3 and 7, the evaporator set 3 includes a first evaporator 31 and a second evaporator 32 disposed within an evaporator chamber, and the evaporator chamber includes a return air chamber between the first evaporator 31 and the second evaporator 32. The air flow in the refrigerator flows into the return air cavity through the return air opening and then flows to the first evaporator 31 and the second evaporator 32 at the two sides respectively, so that the mutual interference of the air flows to the two evaporators can be avoided. The space L between the first evaporator 31 and the second evaporator 32 is set so as to satisfy: l is greater than or equal to S/(a '+c'). Wherein S is the total area of return air inlet, and a 'and c' are the length of two different positions of return air chamber or first evaporimeter 31 respectively, and, at least one of two different positions is close to the return air inlet, so can make the interval setting of a plurality of evaporimeters more reasonable to make the freezer effectively refrigerate, satisfy actual refrigeration demand.

As described above, yS=V, and when the length, width and height of the first evaporator and the second evaporator are a, b and c, respectively, and the volume is V, L.gtoreq.2V/y (a '+c'), or L.gtoreq.2abc/y (a '+c').

Optionally, the return air cover plate 2 includes a first cover plate portion 21 disposed along a horizontal direction, and the first cover plate portion 21 is provided with a first return air inlet 211 located at the top of the return air cavity. Wherein a 'is the length of a position in the return air cavity near the first return air inlet 211, and a' is greater than or equal to the length of the first return air inlet 211 and less than or equal to the total length of the first cover plate 21 along the length direction of the first return air inlet 211.

So set up, set up the first return air inlet 211 that is located the return air chamber top at first apron portion 21, can make the air current in the freezer flow through first return air inlet 211 inflow return air chamber's return air efficiency higher, and then make the air current circulation efficiency in the freezer higher. The length of a position, close to the first air return opening 211, in the air return cavity is taken as a ', so that a' is greater than or equal to the length of the first air return opening 211 and less than or equal to the total length of the first cover plate part 21 along the length direction of the first air return opening 211, and therefore the contact surface between the air flow entering the air return cavity from the first air return opening 211 and the evaporator is larger, and the heat exchange efficiency of the evaporator is higher.

Optionally, the first evaporator 31 includes a first edge 311 adjacent to the first return opening 211 and having a first length a. Wherein the length value of a' is equal to the first length a of the first edge 311.

So configured, the first edge 311 of the first evaporator 31, which is close to the first air return opening 211 and has the first length a, is a windward side of the first evaporator 31. The length value of a' is equal to the first length a of the first edge 311, so that the contact area between the windward side of the first evaporator 31 and the return air cavity is larger, and the heat exchange efficiency of the evaporator is higher.

Optionally, the return air cover plate 2 further includes a second cover plate portion 22 disposed along a vertical direction, and the second cover plate portion 22 is provided with a second return air opening 221 located at a side of the return air cavity. Wherein c 'is the length of a position in the return air cavity near the second return air inlet 221, and c' is greater than or equal to the length of the second return air inlet 221 and less than or equal to the total length of the second cover plate portion 22 along the length direction of the second return air inlet 221.

So set up, set up the second return air inlet 221 that is located the return air chamber lateral part at second apron portion 22, can make the air current in the freezer flow through second return air inlet 221 and flow into the return air chamber return air efficiency higher, and then make the air current circulation efficiency in the freezer higher. The length of a position, close to the second air return opening 221, in the air return cavity is taken as c ', so that c' is greater than or equal to the length of the second air return opening 221 and less than or equal to the total length of the second cover plate part 22 along the length direction of the second air return opening 221, and therefore the contact surface between the air flow entering the air return cavity from the second air return opening 221 and the evaporator is larger, and the heat exchange efficiency of the evaporator is higher.

Optionally, the first evaporator 31 comprises a second edge 312 adjacent to the second return opening 221 and having a second length c. Wherein the length value of c' is equal to the second length c of the second edge 312. That is, L.gtoreq.2V/y (a+c), or L.gtoreq.2abc/y (a+c).

So configured, the second edge 312 of the first evaporator 31 adjacent to the second return air inlet 221 and having the second length c is the opposite side of the windward side of the first evaporator 31. The length value of c' is equal to the second length c of the second edge 312, so that the contact area between the windward side of the first evaporator 31 and the return air cavity is larger, and the heat exchange efficiency of the evaporator is higher.

In some embodiments, the refrigerator includes a liner 1, a return air cover 2, an evaporator, and a compressor 4. The inner container 1 encloses an inner space, and the inner container 1 defines an air supply duct having an air supply opening 15. The return air cover plate 2 is located in the inner space, and separates the inner space into a storage cavity and an evaporator cavity provided with an evaporator, an outlet of the evaporator cavity is communicated with an inlet of the air supply duct, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity can flow into the evaporator cavity through the return air inlet. The compressor 4 is provided at the lower portion of the evaporator. The return air cover plate 2 comprises a side cover plate part, and a horizontal heat insulation distance m is arranged between the evaporator and the side cover plate part.

As shown in connection with fig. 6, the refrigerator includes a liner 1, a return air cover plate 2, an evaporator and a compressor 4. Wherein, return air apron 2 includes side cover plate portion, through setting up horizontal interval Wen Jianju m between evaporimeter and side cover plate portion for carry out thermal-insulated processing to the evaporimeter, avoid the cold volume loss of evaporimeter, and then guarantee the heat transfer effect of air current and evaporimeter in the freezer, thereby improve the refrigeration effect of freezer.

Optionally, the horizontal thermal insulation distance m is greater than or equal to 2mm. And/or the horizontal spacing Wen Jianju m is less than or equal to 50mm.

The size of the horizontal partition Wen Jianju m is set to be more than or equal to 2mm, so that the heat preservation requirement on the temperature in the evaporator cavity can be met, and the refrigerating effect of the refrigerator is further guaranteed. Further, the horizontal spacing Wen Jianju m is set to be less than or equal to 50mm, so that the horizontal spacing Wen Jianju m can save more space on the basis of meeting the heat preservation requirement on the temperature in the evaporator cavity. At the same time, more filling material can be saved for the same. If the horizontal spacing Wen Jianju m is set to a size of less than 2mm, the heat preservation effect on the evaporator intra-cavity temperature is poor. While setting the horizontal spacing Wen Jianju m to be greater than 50mm takes up more space and wastes more filler material.

Alternatively, the return air cover plate 2 includes a first cover plate portion 21 disposed in a horizontal direction. Wherein a vertical thermal insulation distance n is provided between the evaporator and the first cover plate portion 21.

Through setting up vertical interval Wen Jianju n between evaporimeter and first apron portion 21 for carry out thermal-insulated processing to the evaporimeter, avoid the cold volume loss of evaporimeter, and then guarantee the heat transfer effect of air current and evaporimeter in the freezer, thereby improve the refrigeration effect of freezer.

Optionally, the vertical insulation distance n is greater than or equal to 2mm. And/or, the vertical spacing Wen Jianju n is less than or equal to 50mm.

The size of the vertical partition Wen Jianju n is set to be more than or equal to 2mm, so that the heat preservation requirement on the temperature in the evaporator cavity can be met, and the refrigerating effect of the refrigerator is further guaranteed. Further, the vertical partition Wen Jianju n is sized to be less than or equal to 50mm, which allows the vertical partition Wen Jianju n to save more space while meeting the thermal insulation requirements for the evaporator cavity temperature. At the same time, more filling material can be saved for the same. If the vertical spacing Wen Jianju n is set to a size less than 2mm, the insulation effect on the evaporator cavity temperature is poor. While setting the vertical spacing Wen Jianju n to be greater than 50mm takes up more space and wastes more filler material.

Optionally, the horizontal thermal insulation distance m is filled with a thermal insulation material. And/or the vertical thermal insulation distance n is filled with thermal insulation materials.

By filling a thermal insulation material, such as a foam material, at a distance of either the horizontal thermal insulation distance m or the vertical thermal insulation distance n. Because the temperature in the evaporator cavity is lower, the foam with certain thickness can effectively inhibit the heat exchange between the evaporator cavity and the air in the external cabinet body of the evaporator cavity wall, thereby playing a role in preserving the temperature in the evaporator cavity and further ensuring the heat exchange effect between the air flow in the refrigerator and the evaporator. Meanwhile, a certain thickness of foam may also support the side cover part or the first cover part 21. Furthermore, the heat insulation materials can be filled in the horizontal separation Wen Jianju m and the vertical separation distance n, so that the heat insulation effect of the heat insulation materials on the temperature in the evaporation cavity is better.

Optionally, the volute depth g of the fan 5 is greater than or equal to 50mm. And/or the volute depth g of the fan 5 is less than or equal to 150mm.

With reference to fig. 4, the size of the volute depth g of the fan 5 is set to be greater than or equal to 50mm, so that the fan 5 can be ensured to operate undisturbed, and the effective circulation of air flow in the refrigerator can be satisfied. Further, the size of the volute depth g of the fan 5 is set to be smaller than or equal to 150mm, so that more space can be saved on the basis of ensuring that the operation of the fan 5 is not disturbed. If the size of the volute depth g of the blower 5 is set to be less than 50mm, normal operation of the blower 5 may be affected. And the size of the volute depth g of the fan 5 is set to be larger than 150mm, so that more space is occupied.

Optionally, a distance h between the outside of the volute of the fan 5 and the evaporator is greater than or equal to 10mm. And/or, the distance h between the outer side of the volute of the fan 5 and the evaporator is smaller than or equal to 200mm.

With reference to fig. 6, the distance h between the outer side of the volute of the fan 5 and the evaporator is set to be greater than or equal to 10mm, so that after the return air flow exchanges heat with the evaporator, a sufficient distance is reserved for re-rectifying the return air flow and then the return air flow enters the volute air channel of the fan 5 to effectively circulate the air flow. Further, the distance h between the outer side of the volute of the fan 5 and the evaporator is set to be smaller than or equal to 200mm, so that after heat exchange between the return air flow and the evaporator is ensured, the space in the cavity of the evaporator is saved on the basis that the sufficient distance is reserved for re-rectifying the air flow entering the volute air channel of the fan 5 for effective circulation. If the distance h between the outer side of the volute of the fan 5 and the evaporator is smaller than 10mm, the efficiency of reentering the air channel of the volute of the fan 5 after heat exchange between the return air flow and the evaporator can be influenced, and then the effective circulation of the air flow in the refrigerator is influenced. And the space h between the outer side of the volute of the fan 5 and the evaporator is set to be larger than 200mm, so that the space of the evaporator cavity is wasted.

Optionally, the refrigerator further includes a press cavity step 14. The press cavity step 14 is arranged to be protruded upwards from the bottom wall 13 of the inner container 1 and is arranged at the lower part of the return air cover plate 2, and the press cavity step 14 and the bottom wall 13 of the inner container 1 are enclosed together to form a press cavity for placing the compressor 4.

So set up, the freezer needs to place components such as compressor 4, condenser, and so, and the press chamber step 14 that upwards protrudes from the diapire 13 of inner bag 1 and the diapire 13 of inner bag 1 enclose the shape press chamber together and can be used for placing compressor 4. It will be appreciated that the compressor chamber step 14 is disposed below the return air cover plate 2 such that the return air cover plate 2, the compressor chamber step 14 and the side walls of the liner 1 enclose the evaporator chamber for placement of the evaporator. The evaporator is located above the step 14 of the pressing cavity, so that the evaporator cannot occupy the inner space of the liner 1 excessively, the storage volume of the storage cavity is guaranteed, the evaporator cavity is more compact, and the heavy feeling in the refrigerator is reduced.

In some embodiments, the refrigerator includes a liner 1, a return air cover 2, and an evaporator set 3. The inner container 1 encloses an inner space, and the inner container 1 defines an air supply duct having an air supply opening 15. The return air cover plate 2 is located in the inner space and divides the inner space into a storage cavity and an evaporator cavity, an outlet of the evaporator cavity is communicated with an inlet of the air supply duct, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity can flow into the evaporator cavity through the return air inlet. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator chamber, and a communication pipe 33 that communicates the first evaporator 31 and the second evaporator 32. Wherein the evaporator chamber is provided with a foaming layer, and at least part of the communication pipe 33 is arranged in the foaming layer.

The refrigerator comprises an inner container 1, a return air cover plate 2 and an evaporator group 3. The inner container 1 defines an air supply duct with an air supply opening 15, and can provide refrigerating air flow for the inner space enclosed by the inner container 1 so as to reduce the temperature of the inner space. The return air cover plate 2 is provided with a return air inlet, when the refrigerator runs, air flow in the evaporator cavity flows into the air supply duct under the drive of the fan 5 after the temperature of the evaporator is reduced, then flows into the storage cavity through the air supply inlet 15, refrigerates articles in the storage cavity, and then flows back into the evaporator cavity through the return air inlet. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator chamber, and a communication pipe 33 communicating the first evaporator 31 with the second evaporator 32, so that the provision of two communicating evaporators can improve the refrigerating efficiency of the refrigerator. By arranging at least part of the communicating pipe 33 in the foaming layer in the evaporator cavity, the heat exchange efficiency of the communicating evaporator is prevented from being influenced by all frosting of the communicating pipe 33, so that the refrigerating effect of the refrigerator is improved.

Alternatively, the foaming layer includes at least a bottom foaming layer provided at the bottom of the evaporator group 3. Wherein at least part of the communication tube 33 is disposed in the bottom foaming layer.

By arranging at least part of the communicating pipe 33 in the bottom foaming layer at the bottom of the evaporator group 3, the heat exchange efficiency of the communicating evaporator can be prevented from being affected by the whole frost formation of the communicating pipe 33. At the same time, the uncertainty of the communicating tube 33 being suspended in the air and pulled can be reduced, and the communicating tube 33 is prevented from being damaged.

Alternatively, the first evaporator 31 communicates with the second evaporator 32 in series or in parallel.

Thus, when the first evaporator 31 and the second evaporator 32 are connected in series, the temperatures of the first evaporator 31 and the second evaporator 32 can be uniformly controlled, so that the temperatures of the air flows out of the air supply channels of the first evaporator 31 and the second evaporator 32 are similar or identical. When the first evaporator 31 and the second evaporator 32 are connected in parallel, each evaporator can be controlled independently, and the air outlet temperature of the air supply duct of the first evaporator 31 and the air outlet temperature of the air supply duct of the second evaporator 32 can be controlled independently, so that the mutual interference of the two evaporators can be avoided.

Optionally, the liner 1 includes a first sidewall 11, and the first sidewall 11 defines a first air supply duct 111 having an air supply port 15, where a first fan 5 is disposed in the first air supply duct 111, and a first inlet and a first outlet of the first evaporator 31 are disposed on a side close to the first fan 5. And/or, the liner 1 comprises a second side wall 12, the second side wall 12 defines a second air supply duct 112 with an air supply opening 15, wherein a second fan 5 is arranged in the second air supply duct 112, and a second inlet and a second outlet of the second evaporator 32 are arranged at one side close to the second fan 5.

So arranged, the first side wall 11 of the liner 1 defines the first air supply duct 111 with the air supply opening 15 and the first fan 5 arranged inside, so that the first inlet and the first outlet of the first evaporator 31 are arranged on one side close to the first fan 5, and thus the air flow of the refrigerator can flow out from the first side wall 11 and flows through the first evaporator 31 from the air return opening of the air return cover plate 2 for air circulation. The second side wall 12 of the inner container 1 defines a second air supply duct 112 with an air supply opening 15 and a second fan 5 arranged inside, so that the second inlet and the second outlet of the second evaporator 32 are arranged on one side close to the second fan 5, and thus the air flow of the refrigerator can flow out from the second side wall 12 and flows through the second evaporator 32 from the air return opening of the air return cover plate 2 for air flow circulation. Like this, the air current of freezer flows out from the return air inlet return air of return air apron 2 from first lateral wall 11 and second lateral wall 12, can shorten the flow distance of outflow air current, reduces the air current flow in-process and receives the blocking of other parts, improves the forced air cooling refrigeration effect of freezer.

Alternatively, the communication pipe 33 is provided below the first inlet and the first outlet of the first evaporator 31. And/or the communication pipe 33 is disposed below the second inlet and the second outlet of the second evaporator 32.

So configured, the communication tube 33 is disposed below the first inlet and the first outlet of the first evaporator 31, or the communication tube 33 is disposed below the second inlet and the second outlet of the second evaporator 32, which facilitates the circulation of the refrigerant between the first evaporator 31 and the second evaporator 32. Meanwhile, the communication pipe 33 may be disposed near the bottom of the evaporator chamber, which may reduce bending of the communication pipe 33, reduce the length of the communication pipe 33, and facilitate installation of the communication pipe 33.

Optionally, the first evaporator 31 includes a first heat exchange tube bank 314 and a first heating tube bank 315 disposed at least partially below the first heat exchange tube bank 314. And/or second evaporator 32 includes a second heat exchange tube group 321 and a second heating tube group 322 disposed at least partially below second heat exchange tube group 321.

So configured, at least a portion of the first heating tube group 315 of the first evaporator 31 is disposed below the first heat exchange tube group 314 for performing a defrosting process for heating the first evaporator 31. Alternatively, at least part of second heating tube group 322 of second evaporator 32 is disposed below second heat exchanging tube group 321 for performing a defrosting process for heating second evaporator 32. Further, at least part of the first heating tube group 315 of the first evaporator 31 and at least part of the second heating tube group 322 of the second evaporator 32 may be disposed below the first heat exchange tube group 314 and the second heat exchange tube group 321, respectively, to heat the first evaporator 31 and the second evaporator 32, respectively, to perform defrosting treatment, so that the heat exchange efficiency of the first evaporator 31 and the second evaporator 32 is not affected.

In some embodiments, the refrigerator includes a liner 1, a return air cover 2, and an evaporator set 3. The inner container 1 encloses an inner space, and the inner container 1 defines an air supply duct having an air supply opening 15. The return air cover plate 2 is located in the inner space, the inner space is divided into a storage cavity and an evaporator cavity, an outlet of the evaporator cavity is communicated with an inlet of the air supply duct, the return air cover plate 2 is provided with a return air inlet, and air flow in the storage cavity can flow into the evaporator cavity through the return air inlet. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator chamber, and a communication pipe 33 that communicates the first evaporator 31 and the second evaporator 32. Wherein the evaporator group 3 comprises a heat conduction fin group and a heat exchange tube group penetrating through the heat conduction fin group, and the distance between at least part of the communicating tube 33 and the heat conduction fin group is smaller than or equal to the heat transfer distance.

As shown in connection with fig. 8, the refrigerator includes a liner 1, a return air cover plate 2, and an evaporator set 3. The inner container 1 defines an air supply duct with an air supply opening 15, and can provide refrigerating air flow for the inner space enclosed by the inner container 1 so as to reduce the temperature of the inner space. The return air cover plate 2 is provided with a return air inlet, when the refrigerator runs, air flow in the evaporator cavity flows into the air supply duct under the drive of the fan 5 after the temperature of the evaporator is reduced, then flows into the storage cavity through the air supply inlet 15, refrigerates articles in the storage cavity, and then flows back into the evaporator cavity through the return air inlet. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator chamber, and a communication pipe 33 communicating the first evaporator 31 with the second evaporator 32, so that the provision of two communicating evaporators can improve the refrigerating efficiency of the refrigerator. By setting the distance between at least part of the communicating pipe 33 and the heat conducting fin group to be less than or equal to the heat transfer distance, the whole frosting of the communicating pipe 33 or the frosting of the communicating pipe 33 can be avoided, thereby ensuring the heat exchange efficiency of the evaporator and further improving the refrigerating effect of the refrigerator.

Optionally, the heat transfer distance is less than or equal to 10mm.

By setting the heat transfer distance to be less than or equal to 10mm, the communication pipe 33 can be ensured to avoid frosting or accelerate frosting, and the heat exchange efficiency of the evaporator can be further ensured. If the heat transfer distance is set to be greater than 10mm, heat transfer of the heat conduction fins to the connection pipe is affected, and thus defrosting efficiency after frosting of the connection pipe 33 is affected.

Optionally, the evaporator chamber includes a return air chamber located between the first evaporator 31 and the second evaporator 32. Wherein at least part of the communicating pipe 33 is disposed in the return air chamber.

So set up, set up the return air chamber between first evaporimeter 31 and second evaporimeter 32, the air current in the freezer can flow to the first evaporimeter 31 and the second evaporimeter 32 of both sides respectively after flowing into the return air chamber through the return air inlet like this, can avoid the air current mutual interference that flows to two evaporimeters. At least part of the communicating pipe 33 is arranged in the return air cavity, and then the air flow flowing in from the return air inlet passes through the communicating pipe 33, so that the air flow can be close to the heating defrosting device of the refrigerator, and the communicating pipe 33 can be defrosted better.

Optionally, the first evaporator 31 includes a first heat-conducting fin group 316, and the communicating tube 33 includes a first bent tube section 331 having a distance from the first heat-conducting fin group 316 less than or equal to the heat transfer distance. And/or, the second evaporator 32 includes a second heat conductive fin group 323, and the communication pipe 33 includes a second bent pipe section 332 having a distance from the second heat conductive fin group 323 less than or equal to the heat transfer distance.

So set up, set up the distance between first kink section 331 and the first heat conduction fin of connecting pipe less than or equal to heat transfer distance, then can guarantee that first heat conduction fin carries out the heat conduction effectively to the first kink section 331 of connecting pipe, and then can avoid communicating pipe 33 to frost entirely or make communicating pipe 33 frosted back as soon as possible. Meanwhile, the distance between the second bending tube section 332 of the connecting tube and the second heat conducting fin is set to be smaller than or equal to the heat transfer distance, so that the second heat conducting fin can be guaranteed to conduct heat effectively to the second bending tube section 332 of the connecting tube, and further all frosting of the communicating tube 33 can be avoided or the frosting of the communicating tube 33 can be quickly performed after the frosting of the communicating tube 33.

Optionally, the first inlet and the first outlet of the first evaporator 31 are disposed toward one side of the return air chamber. And/or the second inlet and the second outlet of the second evaporator 32 are disposed toward one side of the return air compartment.

So arranged, the first inlet and the first outlet of the first evaporator 31 are arranged towards one side of the return air cavity, which facilitates the circulation of the refrigerant in the first evaporator 31 to the second evaporator 32. The second inlet and the second outlet of the second evaporator 32 are provided toward one side of the return air chamber, thus facilitating the circulation of the refrigerant in the second evaporator 32 to the first evaporator 31. Meanwhile, the first inlet and the first outlet of the first evaporator 31 and the second inlet and the second outlet of the second evaporator 32 are arranged towards one side of the return air cavity, so that the circulation of the refrigerant between the first evaporator 31 and the second evaporator 32 is facilitated, and the refrigerating effect of the refrigerator is improved.

Optionally, the refrigerator further comprises a compressor 4. The compressor 4 is provided at a lower portion of the evaporator group 3.

Optionally, the refrigerator further includes a press cavity step 14. The press cavity step 14 protrudes upwards from the bottom wall 13 of the liner 1 and is arranged at the lower part of the return air cover plate 2, and the press cavity step 14 and the bottom wall 13 of the liner 1 are enclosed together to form a press cavity for placing the compressor 4.

So set up, the freezer needs to place components such as compressor 4, condenser, and so, and the press chamber step 14 that upwards protrudes from the diapire 13 of inner bag 1 and the diapire 13 of inner bag 1 enclose the shape press chamber together and can be used for placing compressor 4. It will be appreciated that the compressor chamber step 14 is disposed below the return air cover plate 2 such that the return air cover plate 2, the compressor chamber step 14 and the side walls of the liner 1 enclose the evaporator chamber for placement of the evaporator. So the evaporator is located the top of press chamber step 14, and the evaporator can not too much occupy inner bag 1 inner space like this, has guaranteed the storing volume in storing chamber to make the evaporator chamber compacter, increase the practical space of freezer.

In some embodiments, the fan 5 includes a volute tongue assembly 52 and a wind wheel 51 disposed within the volute tongue assembly 52. The volute tongue assembly 52 includes a first volute 521, a first volute tongue 522, a second volute 523, and a second volute tongue 524. The first volute 521 and the first volute tongue 522 enclose the first fan outlet 53. The second volute 523 and the second volute tongue 524 enclose the second fan outlet 54. The wind wheel center 511 and the first volute tongue 522 form a first auxiliary connecting line, the wind wheel center 511 and the second volute tongue 524 form a second auxiliary connecting line, and an included angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 90 degrees and smaller than 180 degrees.

As shown in fig. 11, the fan 5 includes a volute tongue assembly 52 and a wind wheel 51 disposed in the volute tongue assembly 52. The first volute 521 and the first volute tongue 522 in the volute tongue assembly 52 enclose a first fan outlet 53, and the second volute 523 and the second volute tongue 524 enclose a second fan outlet 54. The wind wheel center 511 forms a first auxiliary connecting line l1 and a second auxiliary connecting line l2 with the first volute tongue 522 and the second volute tongue 524 respectively. Through setting the contained angle between first auxiliary line l1 and the second auxiliary line l2 to be greater than 90 and less than 180, make fan 5 can carry out accurate control to different wind channel air supply volume, and then realize the accurate control to the air supply volume of inner space to promote the samming nature of freezer, improve the forced air cooling effect of freezer, reduce the energy consumption.

In some embodiments, the first volute tongue 522 in the volute tongue assembly 52 in the fan 5 is circular-arc shaped, as shown in fig. 12. The wind wheel center 511 forms a first auxiliary connecting line l1 and a second auxiliary connecting line l2 with the first volute tongue 522 and the second volute tongue 524 respectively. At this time, the first auxiliary connection line l1 is a connection line between the wind wheel center 511 and the arc end of the first volute tongue 522, which is close to the first fan air outlet 53.

Specifically, the included angle between the first auxiliary connection line l1 and the second auxiliary connection line l2 may be set to 95 °, 100 °, 110 °, 120 °, 130 °, 140 °, 150 °, 160 °, 170 °, 175 °, and may be selectively set according to different air speed ratio requirements of the first air supply duct 111 and the second air supply duct 112.

In some embodiments, the refrigerator includes a liner 1 and a blower 5. The inner container 1 encloses an inner space, the inner container 1 comprises a first side wall 11, and the first side wall 11 is provided with a first air supply duct 111 and a second air supply duct 112. The blower 5 includes a first blower outlet 53 in communication with the first supply air duct 111 and a second blower outlet 54 in communication with the second supply air duct 112. Wherein, fan 5 is above-mentioned fan 5.

The refrigerator provided by the embodiment of the disclosure comprises an inner container 1 and a fan 5. The inner container 1 encloses an inner space, and the first side wall 11 of the inner container 1 is provided with a first air supply duct 111 and a second air supply duct 112, so that a refrigerating air flow can be provided for the inner space enclosed by the inner container 1 to reduce the temperature of the inner space. The fan 5 includes a volute tongue assembly 52 and a wind wheel 51 disposed within the volute tongue assembly 52. The first volute 521 and the first volute tongue 522 of the volute tongue assembly 52 enclose a first fan outlet 53, and the second volute 523 and the second volute tongue 524 enclose a second fan outlet 54. The first air supply duct 111 and the second air supply duct 112 on the first side wall 11 of the liner 1 are respectively communicated with the first fan air outlet 53 and the second fan air outlet 54 of the fan 5. Under the driving of the fan 5, the refrigerating air flow enters the inner container 1 through the first air supply air duct 111 and the second air supply air duct 112 to enclose an inner space, so as to reduce the temperature of the inner space. The wind wheel center 511 and the first volute tongue 522 form a first auxiliary connection line l1, and the wind wheel center 511 and the second volute tongue 524 form a second auxiliary connection line l2. Through setting the contained angle between first auxiliary connection line and the second auxiliary connection line to be greater than 90, and be less than 180, make fan 5 can carry out accurate control to different wind channel air supply volume, and then realize the accurate control to the air supply volume of inner space to promote the samming nature of freezer, improve the forced air cooling effect of freezer, reduce the energy consumption.

Alternatively, the first air supply duct 111 is disposed at an upper portion of the first side wall 11, and the second air supply duct 112 is disposed at a lower portion of the first side wall 11. The included angle between the second auxiliary connecting line l2 formed by the wind wheel center 511 and the second volute tongue 524 and a perpendicular line l3 is greater than or equal to 20 degrees and less than or equal to 60 degrees. Or, the included angle between the second auxiliary connecting line l2 formed by the wind wheel center 511 and the second volute tongue 524 and a vertical line l3 is greater than or equal to 20 degrees and less than or equal to 40 degrees.

In this way, the setting position of the second volute tongue can be determined by the included angle between the second auxiliary connecting line l2 and a perpendicular line l3, and further, the setting position of the first volute tongue is determined according to the included angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2, that is, the precise air supply of the fan 5 to the first air supply duct 111 and the second air supply duct 112 is further realized.

Optionally, the included angle between the first auxiliary connection line l1 and the second auxiliary connection line l2 is greater than 100 ° and less than or equal to 140 °. Or, the included angle between the first auxiliary connection line l1 and the second auxiliary connection line l2 is greater than 130 ° and less than or equal to 140 °. Alternatively, the included angle between the first auxiliary connection line l1 and the second auxiliary connection line l3 is greater than 170 ° and less than 180 °.

As shown in fig. 10 and 11, the upper and lower parts of the first side wall 11 of the liner 1 are provided with a first air duct 111 and a second air duct 112, respectively, the first air duct 111 is provided with a first air duct air outlet 1113, and the second air duct 112 is provided with a second air duct air outlet 1123. When the refrigerator is in operation, in the air circulation process, the fan 5 utilizes the first air supply duct 111 and the second air supply duct 112 to convey refrigerating air flow to the inner space enclosed by the liner 1 through the first air duct outlet and the second air duct outlet. When the wind pressure is constant, the natural sinking of the cold wind causes a proportional relationship between the air supply amounts of the first air supply duct 111 and the second air supply duct 112 to be one of the main factors affecting the temperature uniformity inside the cabinet. In the embodiment of the disclosure, the wind wheel center 511 forms a first auxiliary connecting line l1 and a second auxiliary connecting line l2 with a first volute tongue 522 and a second volute tongue 524 respectively, an included angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 is set to be more than 90 degrees and less than 180 degrees, so that the fan 5 can accurately control the air quantity of the first air supply duct 111 and the second air supply duct 112 through the first fan air outlet 53 and the second fan air outlet 54 respectively, and further, the accurate control of the air quantity of the inner space is realized, thereby improving the temperature uniformity of the refrigerator, improving the air cooling effect of the refrigerator and reducing the energy consumption.

In the embodiment of the disclosure, the included angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 is set to be greater than 130 ° and less than or equal to 140 °, and the included angle between the second auxiliary connecting line l2 formed by the wind wheel center 511 and the second volute tongue 524 and a perpendicular line l3 is set to be greater than or equal to 20 ° and less than or equal to 40 °.

In the following, taking 200L of the volume of the refrigerator, on the basis that natural sedimentation exists in cold air, taking the included angle between a first auxiliary connecting line L1 and a second auxiliary connecting line L2 as 135 degrees, taking the included angle between a second auxiliary connecting line formed by a wind wheel center 511 and a second volute tongue 524 and a vertical line L3 as an example, the temperature difference in the refrigerator is smaller by matching with the first air channel air supply opening 1113 arranged in the first air supply channel 111 and the second air channel air supply opening 1123 arranged in the second air supply channel 112, the temperature uniformity of the refrigerator is improved, the air cooling effect of the refrigerator is improved, and the energy consumption is reduced. See, in particular, tables 2 and 3.

TABLE 2

TABLE 3 Table 3

As can be seen from table 2 above, when the angle between the first auxiliary connection line and the second auxiliary connection line is set to 135 ° and the angle between the second auxiliary connection line formed by the wind wheel center 511 and the second volute tongue 524 and a perpendicular line is set to 32 °, the detection is performed twice under the same conditions, and the detection results are shown in example 1 and example 2, respectively. In embodiment 1, the air speeds of the first air supply duct 111 and the second air supply duct 112 are 64.00% and 36.00%, respectively, and the final air supply volume is 1047.56L/min. In embodiment 2, the air speeds of the first air supply duct 111 and the second air supply duct 112 are 63.76% and 36.24%, respectively, and the final air supply volume is 1040.57L/min. As can be seen from the results of examples 1 and 2, the blower fan has different blowing speeds to the first blowing duct 111 and the second blowing duct 112 in consideration of the natural settling of the cool air. Further, as can be seen from the combination of table 3, the lowest temperature of the inner space of the refrigerator liner 1 in example 1 was-20.6 ℃ at the center of the bottom wall 13 of the liner 1, and the highest temperature was-19.3 ℃ at the front left of the top of the liner 1. So can obtain, the temperature difference of the highest temperature and the minimum temperature of the inner space of freezer inner bag 1 is 1.3 ℃, and this data indicates that the temperature difference between each position of the inner space of freezer inner bag 1 is very little, and also indicates that, in this disclosed embodiment, through the different wind speed to first air supply wind channel 111 and second air supply wind channel 112, the temperature difference between the different positions of freezer has been reduced, has improved the samming nature of freezer.

It can be understood that, when the included angle between the first auxiliary connection line and the second auxiliary connection line is set to be greater than 90 ° and less than 180 °, and the included angle between the second auxiliary connection line formed by the wind wheel center 511 and the second volute tongue 524 and a perpendicular line is greater than or equal to 20 ° and less than or equal to other values of 60 °, the refrigerator can obtain the same test result as that of embodiment 1 in terms of the air supply volume and the temperature difference, and further obtain the same beneficial effects.

Optionally, the first supply air duct 111 includes a first diffuser duct 1111 in direct communication with the first fan outlet 53, and a first plenum duct 1112 in communication with the first diffuser duct 1111. The second supply air duct 112 includes a second diffuser duct 1121 in direct communication with the second fan outlet 54, and a second plenum duct 1122 in communication with the second diffuser duct 1121. The total area of the air supply openings 15 of the first pressure stabilizing section air duct 1112 is larger than the area of the air supply openings 15 of the second pressure stabilizing section air duct 1122.

By providing the first air supply duct 111 as the first diffuser duct 1111 in direct communication with the first fan outlet 53 and the first pressure stabilizing duct 1112 in communication with the first diffuser duct 1111, the flow of the refrigerant gas entering the inner space from the first air supply duct 111 can be made more stable. The second air supply duct 112 is provided with the second diffuser duct 1121 directly communicated with the second fan outlet 54 and the second pressure stabilizing duct 1122 communicated with the second diffuser duct 1121, so that the air flow of the refrigerant gas entering the inner space from the second air supply duct 112 can be more stabilized. Further, since the total amount of the refrigerant gas distributed by the first air supply duct 111 is large, the total area of the air supply ports 15 of the first pressure stabilizing section air duct 1112 is set to be larger than the area of the air supply ports 15 of the second pressure stabilizing section air duct 1122, so that the air supply ports 15 passing through the first air supply duct 111 can more effectively enter the internal space.

Optionally, the first air supply duct 111 includes a first end air supply opening 15 far from the fan 5, the second air supply duct 112 includes a second end air supply opening 15 far from the fan 5, and the liner 1 includes end side walls near the first end air supply opening 15 and the second end air supply opening 15. The horizontal distance between the first end air supply opening 15 and the end side wall is a first end distance, the horizontal distance between the second end air supply opening 15 and the end side wall is a second end distance, and the first end distance is smaller than the second end distance.

Through setting up to make first terminal interval be less than the second terminal interval, be that the horizontal distance between first terminal supply-air outlet 15 to the terminal lateral wall is less than the horizontal distance between second terminal supply-air outlet 15 to the terminal lateral wall, can make the supply air volume distribution of the second supply-air outlet 15 of second supply-air duct 112 more even like this, and then reduce the difference in temperature of the different positions of the inner space that inner bag 1 encloses, make the samming nature of freezer obtain promoting better.

Alternatively, the difference between the first end pitch and the second end pitch is greater than or equal to the length of one air supply port 15 of the first air supply duct 111. Alternatively, the difference between the first end spacing and the second end spacing is greater than or equal to the length of one supply port 15 of the second supply air duct 112.

So configured, the difference between the first end spacing and the second end spacing is set to be greater than or equal to the length of one air supply port 15 of the first air supply duct 111. Or, the difference between the first end interval and the second end interval is set to be greater than or equal to the length of one air supply opening 15 of the second air supply duct 112, so that the length of one air supply opening 15 of the first air supply duct 111 or the length of one air supply opening 15 of the second air supply duct 112 can be shortened by the second air supply duct 112 relative to the first air supply duct 111, and further, the air supply amount distribution of the second air supply opening 15 of the second air supply duct 112 is more uniform, thereby reducing the temperature difference of different positions of the enclosed inner space of the liner 1, and improving the temperature uniformity of the refrigerator better.

The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may include structural and other modifications. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. The embodiments of the present disclosure are not limited to the structures that have been described above and shown in the drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. The utility model provides a fan, its characterized in that includes spiral case volute tongue subassembly and set up in the wind wheel in the spiral case volute tongue subassembly, wherein, spiral case volute tongue subassembly includes:

the first volute and the first volute tongue are enclosed to form a first fan air outlet;

the second volute casing and the second volute tongue are enclosed to form a second fan air outlet,

the wind wheel center and the first volute tongue form a first auxiliary connecting line, the wind wheel center and the second volute tongue form a second auxiliary connecting line, and an included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 90 degrees and smaller than 180 degrees.

2. The fan as claimed in claim 1, wherein,

the included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 100 degrees and smaller than or equal to 140 degrees; or alternatively, the process may be performed,

the included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 130 degrees and smaller than or equal to 140 degrees; or alternatively, the process may be performed,

the included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 170 degrees and smaller than 180 degrees.

3. A refrigerator, comprising:

the inner container encloses an inner space and comprises a first side wall, and the first side wall is provided with a first air supply duct and a second air supply duct; and, a step of, in the first embodiment,

The fan comprises a first fan air outlet communicated with the first air supply duct and a second fan air outlet communicated with the second air supply duct,

wherein the fan is as claimed in claim 1 or 2.

4. The refrigerator according to claim 3, wherein,

the first air supply duct is arranged at the upper part of the first side wall, the second air supply duct is arranged at the lower part of the first side wall,

the included angle between a second auxiliary connecting line formed by the center of the wind wheel and the second volute tongue and a vertical line is larger than or equal to 20 degrees and smaller than or equal to 60 degrees; or, an included angle between a second auxiliary connecting line formed by the wind wheel center and the second volute tongue and a vertical line is larger than or equal to 20 degrees and smaller than or equal to 40 degrees.

5. The refrigerator according to claim 4, wherein,

the first air supply air duct comprises a first diffusion section air duct which is directly communicated with the air outlet of the first fan, and a first pressure stabilizing section air duct which is communicated with the first diffusion section air duct; the second air supply duct comprises a second diffusion section duct which is directly communicated with the air outlet of the second fan and a second pressure stabilizing section duct which is communicated with the second diffusion section duct,

The total area of the air supply outlets of the first pressure stabilizing section air duct is larger than the area of the air supply outlets of the second pressure stabilizing section air duct.

6. The refrigerator according to claim 4, wherein,

the first air supply duct comprises a first tail end air supply opening far away from the fan, the second air supply duct comprises a second tail end air supply opening far away from the fan, the inner container comprises tail end side walls close to the first tail end air supply opening and the second tail end air supply opening,

the horizontal distance from the first tail end air supply opening to the tail end side wall is a first tail end interval, the horizontal distance from the second tail end air supply opening to the tail end side wall is a second tail end interval, and the first tail end interval is smaller than the second tail end interval.

7. The refrigerator according to claim 6, wherein,

the difference between the first end spacing and the second end spacing is greater than or equal to the length of one air supply port of the first air supply duct; or alternatively, the process may be performed,

the difference between the first end spacing and the second end spacing is greater than or equal to the length of one air supply port of the second air supply duct.

8. The refrigerator of any one of claims 3 to 7, further comprising:

The air return cover plate is positioned in the inner space and divides the inner space into a storage cavity and an evaporator cavity, an outlet of the evaporator cavity is communicated with inlets of the first air supply air duct and the second air supply air duct, the air return cover plate is provided with an air return opening, and air flow in the storage cavity can flow into the evaporator cavity through the air return opening;

the evaporator is arranged in the evaporator cavity; and, a step of, in the first embodiment,

and the compressor is arranged at the lower part of the evaporator cavity.

9. The cooler of claim 8, further comprising:

the compressor cavity step is arranged from the bottom wall of the inner container to be upwards protruded and arranged at the lower part of the return air cover plate, and the compressor cavity step and the bottom wall of the inner container are enclosed together to form a compressor cavity for placing the compressor.

10. The refrigerator of claim 8 wherein the refrigerator comprises,

the relation between the total volume V of the evaporator and the total area S of the return air inlet is as follows:

ys=v, where y is greater than or equal to 50 and less than or equal to 1000.