CN219810100U

CN219810100U - Refrigerating apparatus

Info

Publication number: CN219810100U
Application number: CN202320825124.8U
Authority: CN
Inventors: 刘建伟; 郑皓宇; 张强; 王瑞; 李大伟
Original assignee: Qingdao Haier Special Refrigerator Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Special Refrigerator Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2023-04-13
Filing date: 2023-04-13
Publication date: 2023-10-10
Anticipated expiration: 2033-04-13

Abstract

This application relates to the technical field of electrical equipment, and discloses a refrigeration equipment, including an inner tank, a return air cover and an evaporator. An inner bladder encloses an interior space, and the inner bladder includes a bottom wall. The return air cover encloses the evaporator cavity, and in the vertical direction, the return air cover is set higher than the bottom wall of the inner tank. The evaporator is arranged in the evaporator cavity. Among them, the ratio of the width of the return air cover to the width of the inner tank is 15%-40%. By setting the ratio of the width of the return air cover to the width of the inner tank to 15%-40%, it is possible to ensure the cooling effect of the refrigeration equipment on the basis of facilitating users to access items and meet the actual needs of users.

Description

Refrigerating apparatus

Technical Field

The application relates to the technical field of electrical equipment, in particular to refrigeration equipment.

Background

At present, a refrigerating apparatus is widely used for storing articles at a low temperature, for example, a refrigerator, a freezer, etc. The refrigerator commonly used in the market at present is mainly divided into a vertical refrigerator and a horizontal refrigerator. Wherein, vertical freezer's advantage lies in: the articles are convenient to store and store in a classified way, and the odor tainting is prevented; the disadvantages are: the storage space is small, the storage capacity is limited, and the articles with large volumes cannot be stored. The horizontal refrigerator has large storage space, can store more articles, and can store articles with larger volume. However, the horizontal refrigerator generally has a certain depth, and a user is very inconvenient to access the articles. In the related art, in order to take out objects from the inside of the horizontal refrigerator, a side door is arranged on one side of the main body of the horizontal refrigerator.

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, in order to facilitate a user to take out the article from the horizontal refrigerator, a side door is arranged on one side of the horizontal refrigerator body, so that the sealing performance of the horizontal refrigerator body is deteriorated, and the refrigerating effect of the horizontal refrigerator is affected.

It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the utility model and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.

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 refrigeration equipment, which makes the width setting of the return air cover plate of the refrigeration equipment more reasonable, so that the refrigeration equipment can effectively refrigerate on the basis of conveniently storing and taking articles, and the actual use demands of users are met.

In some embodiments, a refrigeration appliance includes a liner, a return air cover, and an evaporator. The inner container encloses an inner space, and comprises a bottom wall. The return air cover plate encloses the synthetic evaporator cavity, and in the vertical direction, the setting height of return air cover plate is higher than the diapire of inner bag. The evaporator is disposed in the evaporator chamber. Wherein, the ratio of the width of the return air cover plate to the width of the liner is 15% -40%.

Optionally, the ratio of the width of the return air cover plate to the width of the liner is 18% -32%.

Optionally, the ratio of the width of the return air cover plate to the width of the liner is 20% -25%.

Optionally, the difference in height between the top surface and the bottom wall of the return air cover plate is greater than or equal to 300mm.

Optionally, the inner container defines an air supply duct with an air supply port, and the return air cover plate is provided with a return air port.

Optionally, the liner includes a first sidewall and a second sidewall disposed along a width direction. Wherein, the air supply outlet is offered to first lateral wall and/or second lateral wall.

Optionally, the refrigeration device 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 the step of the press cavity is enclosed to form a press cavity for placing the compressor. Wherein, the press chamber sets up in the lower part in evaporimeter chamber, and the evaporimeter transversely sets up in the evaporimeter intracavity.

Optionally, the evaporator comprises a first end plate and a second end plate which are respectively arranged at two sides, and a heat conduction fin and a heat exchange tube which are arranged between the first end plate and the second end plate, and an effective heat exchange part of the evaporator is formed by the heat conduction fin and the heat exchange tube. The ratio of the width of the effective heat exchange part of the evaporator to the width of the return air cover plate is 70-95%.

Optionally, the ratio of the width of the active heat exchange portion of the evaporator to the width of the return air cover plate is 85% -95%.

Optionally, the refrigeration device further comprises a fan, wherein the fan comprises a volute tongue component and a wind wheel arranged in the volute tongue component. The volute tongue assembly includes: 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. And 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. The included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 90 degrees and smaller than 180 degrees. Or, the included angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 100 degrees and less than or equal to 140 degrees. 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 °.

Optionally, a first air supply duct and a second air supply duct are arranged on the first side wall of the inner container. Wherein, the first fan air outlet of fan is linked together with first air supply wind channel, and the second fan air outlet of fan is linked together with second air supply wind channel.

Optionally, the first air supply duct is disposed at an upper portion of the second air supply duct.

The refrigerating equipment provided by the embodiment of the disclosure can realize the following technical effects:

the refrigerating equipment provided by the embodiment of the disclosure comprises an inner container, a return air cover plate and an evaporator. Wherein, the inner bag encloses out the inner space, and the inner bag includes the diapire. The return air apron encloses into the evaporimeter chamber, and the diapire that highly is higher than the inner bag is arranged to the setting of return air apron in vertical direction, and the upper portion in evaporimeter chamber can form the thing platform of putting that has a take height like this, and convenience of customers is put the thing platform and is accessed article. The evaporator is arranged in the evaporator cavity, and when the refrigeration equipment operates, air flow in the evaporator cavity is sent into the inner container to enclose an inner space after the temperature of the air flow in the evaporator cavity is reduced, so that the temperature of the inner space is reduced. The ratio of the width of the return air cover plate to the width of the liner is 15% -40%, so that the refrigerating effect of the refrigerating equipment can be ensured on the basis of facilitating a user to access articles on the article placing platform, and the actual use requirement of the user is met.

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 structural view of a refrigeration apparatus 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 another liner mated with a return air cover provided in an embodiment of the present disclosure;

FIG. 4 is a schematic view of a liner mated with an 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; 3141: a heat exchange tube; 315: a first heating tube group; 316: a first heat conduction fin group; 3161: a heat exchange tube; 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;

d1: the width of the inner container; d2: the width of the return air cover plate; d3: the width of the effective heat exchange part;

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;

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, an embodiment of the present disclosure provides a refrigeration apparatus, including a case and a door 7, where the door 7 is movably disposed above the case. 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 length direction and the left-right direction as the width direction.

The embodiment of the disclosure provides a refrigeration device, 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 disposed along a 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 refrigeration equipment 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 refrigeration equipment is realized, and the air cooling refrigeration of the refrigeration equipment 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 refrigeration device.

The refrigeration device 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 refrigeration effect of the refrigeration equipment is improved, and the energy consumption is reduced.

In some embodiments, the refrigeration appliance includes a liner 1, a return air cover 2, and an evaporator. The inner container 1 encloses an inner space, said inner container 1 comprising a bottom wall 13. The return air cover plate 2 encloses the evaporator cavity, and in the vertical direction, the setting height of the return air cover plate 2 is higher than the bottom wall 13 of the liner 1. The evaporator is disposed in the evaporator chamber. The ratio of the width D2 of the return air cover plate to the width D1 of the liner is 15% -40%.

The refrigerating equipment provided by the embodiment of the disclosure comprises an inner container 1, a return air cover plate 2 and an evaporator. Wherein, the inner container 1 encloses an inner space, and the inner container 1 comprises a bottom wall 13. The return air cover plate 2 encloses into the evaporator cavity, and the setting height of return air cover plate 2 is higher than the diapire 13 of inner bag 1 in vertical direction, and the upper portion in evaporator cavity can form the thing platform of putting that has a take height like this, makes things convenient for the user to access article on putting the thing platform. The evaporator is arranged in the evaporator cavity, and when the refrigeration equipment operates, air flow in the evaporator cavity is sent into the liner 1 to enclose an inner space after the temperature of the air flow in the evaporator cavity is reduced, so that the temperature of the inner space is reduced. The ratio of the width D2 of the return air cover plate to the width D1 of the liner is 15% -40%, so that the refrigerating effect of the refrigerating equipment can be ensured on the basis of facilitating a user to access articles on the article placing platform, and the actual use requirement of the user is met.

It will be appreciated that, as shown in fig. 3, the width D1 of the liner is the distance between the left and right sidewalls of the liner, and the width D2 of the return air cover plate 2 is the width of the upper portion of the return air cover plate 2. The width D1 of the liner is in mm, i.e., millimeters, and the width D2 of the return air cover is in mm, i.e., millimeters. The width ratio shown in tables 1 and 2 is the ratio of the width D2 of the return air cover plate to the width D1 of the liner.

Optionally, the ratio of the width D2 of the return air cover plate to the width D1 of the liner is 18% -32%.

In the embodiment of the disclosure, the ratio of the width D2 of the return air cover plate to the width D1 of the liner is in the range of 18% -32%, so that the refrigerating effect of the refrigerating equipment can be ensured on the basis of facilitating a user to access articles on the article placing platform, and the actual use requirement of the user is met.

TABLE 1

Examples	Liner volume-L	Width of liner-mm	Width of return air cover plate-mm	Width ratio of
					1	120	605	190	31.4％
2	200	805	190	23.6％
					3	245	875	230	26.29％
4	480	1425	270	18.95％
					5	675	1720	345	20.06％

With reference to table 1, by measuring a plurality of parameters of the refrigerating devices with different volumes of the inner containers 1, the optimal width ratio of the width D2 of the return air cover plate of the refrigerating device with different volumes of the inner containers 1 to the width D1 of the inner container is tested under the condition that the refrigerating effect of the refrigerating device is ensured on the basis that a user can conveniently access articles on the article placing platform. The optimal width ratio of the width D2 of the return air cover plate to the width D1 of the liner of the refrigeration equipment with the liner volume of 120L is 31.4%; the optimal width ratio of the width D2 of the return air cover plate to the width D1 of the liner of the refrigeration equipment with the liner volume of 200L is 23.6%; the optimal width ratio of the width D2 of the return air cover plate to the width D1 of the liner of the refrigeration equipment with the liner volume of 245L is 26.29%; the optimal width ratio of the width D2 of the return air cover plate to the width D1 of the liner of the refrigeration equipment with the liner volume of 480L is 18.95%; the optimal width ratio of the width D2 of the return air cover plate to the width D1 of the liner of the refrigeration equipment with the liner volume of 675L is 20.06%. It can be seen that the ratio of the width D2 of the return air cover plate to the width D1 of the liner is between 18% and 32%, so that the refrigerating effect of the refrigerating equipment is ensured on the basis that a user can conveniently access articles on the article placing platform, and the actual use requirement of the user is met.

The determination of the optimum width ratio of the width D2 of the return air flap to the width D1 of the liner is obtained by comparing, for example: convenient object taking space, space in the box, refrigeration effect, evaporator cost and space satisfaction. It is to be understood that: the convenient object taking space is an object placing platform at the upper part of the evaporator cavity formed by the return air cover plate 2; the space in the box is the usable space of the volume of the liner 1 of the refrigeration equipment; the refrigeration effect is the refrigeration efficiency of the evaporator; the space satisfaction is the convenience of using the refrigeration equipment to access the articles, wherein, in order to be satisfied in the convenient article taking space, the satisfaction coefficient is 1.2, and is unsatisfied in other space access articles, the satisfaction coefficient is 0.8, and then the space satisfaction = 1.2 +0.8 of the convenient article taking space (the space in the box-the convenient article taking space).

Optionally, the ratio of the width D2 of the return air cover plate to the width D1 of the liner is 20% -25%.

It will be appreciated that the convenient access space and the space within the bin are in units of L, i.e. litres. The volume of the liner 1 of the refrigeration apparatus is 200L, for example, for explanation.

TABLE 2

As can be seen from table 2, as the ratio of the width D2 of the return air cover plate to the width D1 of the liner increases, the refrigeration effect of the refrigeration equipment also increases. From the aspect of the refrigerating effect of the refrigerating equipment in the practical application process, the practical refrigerating requirement is met by the refrigerating effect of the refrigerating equipment at more than 80%, so that the width ratio of the width D2 of the return air cover plate to the width D1 of the liner is more than 20%. From the aspect of space satisfaction in the practical application process of the refrigeration equipment, after the width ratio of the width D2 of the return air cover plate to the width D1 of the liner is 20%, the space satisfaction gradually decreases along with the increase of the width ratio of the width D2 of the return air cover plate to the width D1 of the liner, so that the best space satisfaction can be obtained within the range of 20% -30% of the width ratio of the width D2 of the return air cover plate to the width D1 of the liner. When the volume of the liner of the refrigeration equipment is 200L, the optimal width ratio of the width D2 of the return air cover plate to the width D1 of the liner is 23.6 percent and is in the range of 20 to 30 percent. Namely, when the volume of the liner of the refrigeration equipment is 200L, the ratio of the width D2 of the return air cover plate to the width D1 of the liner can be selected within the range of 20-25%.

In the use process of the refrigeration equipment, the internal space enclosed by the liner 1 has a certain depth, so that articles are inconvenient to store and take in the actual use process. Therefore, the upper part of the return air cover plate 2 which is enclosed into the evaporator cavity is provided with a storage platform for conveniently storing and taking articles. The height difference between the top surface of the return air cover plate 2 and the bottom wall 13 of the liner 1 is greater than or equal to 300mm, so that a user can more conveniently access articles on the storage platform when the refrigerating equipment is in actual use in the upper part of the evaporator cavity surrounded by the return air cover plate 2.

Specifically, the height difference between the top surface of the return air cover plate 2 and the bottom wall 13 of the liner 1 may be 300mm, 325mm, 340mm, 355mm, 370mm, 380mm, 400mm, 410mm, 415mm.

Optionally, the inner container 1 defines an air supply duct with an air supply port, and the return air cover plate 2 is provided with a return air port.

So arranged, the liner 1 defines an air supply duct having an air supply opening 15, and a fan 5 is provided in the air supply duct. When the refrigeration equipment is operated, 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 refrigeration equipment can be reduced to the set temperature so as to meet the actual refrigeration requirement of a user.

Alternatively, the liner 1 includes a first side wall 11 and a second side wall 12 disposed in the width direction. Wherein, the first side wall 11 and/or the second side wall 12 are/is provided with an air supply outlet.

The arrangement is that the air supply opening is arranged on the first side wall 11 and the second side wall 12 of the liner 1, so that air flow of the refrigeration equipment flows out from the first side wall 11 and the second side wall 12 and returns from the air return opening of the air return cover plate 2, the flowing distance of the flowing air flow can be shortened, the blocking of other parts in the flowing process of the air flow is reduced, and the refrigeration effect of the refrigeration equipment is improved.

Optionally, the refrigeration device further comprises a press cavity step. The step of the press cavity is arranged to be protruded upwards from the bottom wall 13 of the liner 1, and the step of the press cavity is enclosed to form a press cavity for placing the compressor. Wherein, the press chamber sets up in the lower part in evaporimeter chamber, and the evaporimeter transversely sets up in the evaporimeter intracavity.

So set up, the compressor chamber step 14 that refrigeration apparatus set up protruding from the diapire 13 of the inner container 1 encloses the shape compressor chamber together with diapire 13 of the inner container 1 can be used for placing the 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 press cavity is arranged at the lower part of the evaporator cavity, and the evaporator is transversely arranged in the evaporator cavity. So the evaporator is in the transverse evaporator cavity, namely the evaporator is positioned above the step 14 of the pressing machine cavity, so that the evaporator cannot occupy too much inner space of the liner 1, the storage volume of the storage cavity is ensured, the evaporator cavity is more compact, and the practical space of the refrigeration equipment is increased.

Alternatively, the evaporator includes a first end plate and a second end plate provided on both sides, respectively, and a heat conduction fin 3161 and a heat exchange tube 3141 provided between the first end plate and the second end plate, and an effective heat exchange portion of the evaporator is constituted by the heat conduction fin 3161 and the heat exchange tube 3141. The ratio of the width D3 of the effective heat exchange part of the evaporator to the width D2 of the return air cover plate is 70% -95%.

The first evaporator is exemplified as shown in fig. 6. The first and second end plates at both sides of the evaporator are provided with heat conductive fins 3161 and heat exchange tubes 3141 for effective heat exchange of the evaporator, and the heat conductive fins 3161 and the heat exchange tubes 3141 constitute an effective heat exchange portion of the evaporator. Wherein, the distance between the first end plate and the second end plate at two sides of the evaporator is the width D3 of the effective heat exchange part of the evaporator. The ratio of the width D3 of the effective heat exchange part of the evaporator to the width D2 of the return air cover plate is set to 70% -95%, so that the evaporator can perform effective heat exchange, and the actual refrigeration requirement of refrigeration equipment is met.

Optionally, the ratio of the width D3 of the effective heat exchange portion of the evaporator to the width D2 of the return air cover plate is 85% -95%.

In the actual use process of the refrigeration equipment, the heat exchange efficiency of the evaporator can be further improved by setting the ratio of the width D3 of the effective heat exchange part of the evaporator to the width D2 of the return air cover plate to be 85% -95%, so that the actual refrigeration requirement of the refrigeration equipment is met.

In some embodiments, the refrigeration appliance includes a liner 1, a return air cover 2, and an evaporator package 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 fig. 8, the refrigeration apparatus 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 refrigeration equipment is in operation, 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, and after the articles in the storage cavity are refrigerated, 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 that communicates the first evaporator 31 and the second evaporator 32, so that the provision of two communicating evaporators can improve the refrigerating efficiency of the refrigerating apparatus. By setting the distance between at least part of the communicating pipe 33 and the heat conduction fin group to be smaller than or equal to the heat transfer distance, it is possible to avoid all frosting of the communicating pipe 33 or to defrost the communicating pipe 33 as soon as possible after frosting, thereby ensuring the heat exchange efficiency of the evaporator, and improving the refrigeration effect of the refrigeration apparatus.

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.

The arrangement is that a return air cavity is arranged between the first evaporator 31 and the second evaporator 32, so that air flow in the refrigeration equipment flows into the return air cavity through the return air inlet and then flows to the first evaporator 31 and the second evaporator 32 on two sides respectively, and mutual interference of the air flows to the two evaporators can be avoided. 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 a heating defrosting device of the refrigeration equipment, 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 refrigerating equipment is improved.

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

Optionally, the refrigeration apparatus further comprises 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 configured, the refrigeration equipment needs to house the components of the compressor 4, the condenser, etc., and therefore, the press cavity step 14 protruding upward from the bottom wall 13 of the liner 1 and the bottom wall 13 of the liner 1 together enclose a press cavity that can be used for housing the 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 refrigeration plant's practical space.

Optionally, the refrigeration device further includes a fan 5, where the fan 5 includes a volute tongue assembly 52 and a wind wheel 51 disposed in the volute tongue assembly 52. The volute tongue assembly 52 includes: 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. In addition, the center of the wind wheel 51 and the first volute tongue 522 form a first auxiliary connecting line l1, and the center of the wind wheel 51 and the second volute tongue 524 form a second auxiliary connecting line l2. The included angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 is greater than 90 degrees and smaller than 180 degrees. Or, 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 l2 is greater than 170 ° and less than 180 °.

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 refrigeration plant's samming nature, improve refrigeration plant's forced air cooling effect, 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.

Optionally, the first side wall 11 of the liner 1 is provided with a first air supply duct 111 and a second air supply duct 112. Wherein, the first fan air outlet 53 of the fan 5 is communicated with the first air supply duct 111, and the second fan air outlet 54 of the fan 5 is communicated with the second air supply duct 112.

Alternatively, the first air supply duct 111 is disposed at an upper portion of the second air supply duct 112.

In some embodiments, the refrigeration device 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.

The refrigerating equipment 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 refrigeration plant's samming nature, improve refrigeration plant's forced air cooling effect, 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 l2 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 refrigeration equipment is operated, in the air circulation process, the fan 5 utilizes the first air supply duct 111 and the second air supply duct 112 to convey refrigeration 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 this disclosed embodiment, wind wheel center 511 forms first auxiliary line l1 and second auxiliary line l2 with first volute tongue 522 and second volute tongue 524 respectively, sets the contained angle between first auxiliary line l1 and the second auxiliary line l2 to be greater than 90 and less than 180, makes fan 5 carry out the accurate control of the air supply to first air supply wind channel 111 and second air supply wind channel 112 through first fan air outlet 53 and second fan air outlet 54 respectively, and then realizes the accurate control to the air supply of inner space to promote refrigeration plant's samming nature, improve refrigeration plant's forced air cooling effect, reduce 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 the volume of the refrigeration equipment as 200L, 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 example that 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 is 32 degrees, the temperature difference in the refrigeration equipment 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 uniformity of the temperature of the refrigeration equipment is improved, the air cooling effect of the refrigeration equipment is improved, and the energy consumption is reduced. See, in particular, tables 3 and 4.

TABLE 3 Table 3

TABLE 4 Table 4

As can be seen from table 3, 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 4, the lowest temperature of the inner space of the inner container 1 of the refrigeration equipment in example 1 was-20.6 ℃ at the center of the bottom wall 13 of the inner container 1, and the highest temperature was-19.3 ℃ at the front left of the top of the inner container 1. Thus, it can be obtained that the temperature difference between the highest temperature and the lowest temperature of the inner space of the inner container 1 of the refrigeration equipment is 1.3 ℃, and the data indicate that the temperature difference between the positions of the inner space of the inner container 1 of the refrigeration equipment is very small, that is, indicate, in the embodiment of the present disclosure, the air speeds of the first air supply duct 111 and the second air supply duct 112 are different, so that the temperature difference between the different positions of the refrigeration equipment is reduced, and the temperature uniformity of the refrigeration equipment is improved.

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 refrigeration device can obtain the same test result as the 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 far from the fan 5, the second air supply duct 112 includes a second end air supply opening far from the fan 5, and the liner 1 includes end side walls near the first end air supply opening and the second end air supply opening. 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.

Through setting up to make first terminal interval be less than the interval of second terminal, be the horizontal distance between first terminal supply-air outlet to the terminal lateral wall be less than the horizontal distance between second terminal supply-air outlet to the terminal lateral wall, can make the supply air volume distribution of the 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 refrigeration plant's samming nature 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 the air supply amount distribution of the 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 refrigeration equipment better.

In some embodiments, the refrigeration equipment comprises a liner 1, a return air cover plate 2 and an evaporator. The inner container 1 encloses out the inner space, and inner container 1 defines the apron 2 that has supply-air outlet 15 and is located the inner space to separate into storing chamber and evaporimeter chamber with the inner space, the export in evaporimeter chamber is linked together with the entry in supply-air wind channel, and return air apron 2 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 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, where y is less than or equal to 1000 on the premise that y is greater than or equal to 50, so as to satisfy the actual refrigeration requirement of the user using the refrigeration device.

The return air cover plate 2 is provided with a return air inlet, when the refrigerating equipment is in operation, 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, and after the articles in the storage cavity are refrigerated, flows back into the evaporator cavity through the return air inlet, so that a circulating air path of the refrigerating equipment 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 circulating air path of the refrigeration equipment 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 refrigeration equipment are improved. In the following, the number of evaporators in the evaporator chamber is 1 as an example.

TABLE 5

As can be seen from Table 5 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 y values are calculated for different total areas of the return air inlets.

In Table 5, 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 refrigerating equipment can have better energy efficiency level. 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 refrigerating equipment to be cooled to-18 ℃ from the ambient temperature, and the refrigerating depth is the lowest temperature which can be reached by the refrigerating equipment. 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 refrigeration device has lower refrigeration depth and lower power consumption on the basis of ensuring a certain cooling speed, and belongs to the primary energy efficiency. Is significantly better than example 1, example 2, example 5 and example 6.

It will be appreciated that the refrigeration apparatus can achieve the same primary energy efficiency effect as that of embodiment 3 or embodiment 4 when y has a value of 100 or more and 500 or less.

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 refrigeration equipment circulates when the refrigeration equipment is operated.

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 refrigeration apparatus further comprises 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 refrigerating equipment 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 inner container 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 can be used for placing the compressor 4 together with the bottom wall 13 of the inner container 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 refrigeration equipment.

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 sense in the refrigeration equipment 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 providing the first evaporator 31 and the second evaporator 32 such that the first evaporator 31 is located at one end of the evaporator chamber and the second evaporator 32 is located at the other end of the evaporator chamber, the refrigerating efficiency inside the refrigerating apparatus can be made 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 refrigeration appliance from the drain port.

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.

The arrangement is that a return air cavity is arranged between the first evaporator 31 and the second evaporator 32, so that air flow in the refrigeration equipment flows into the return air cavity through the return air inlet and then flows to the first evaporator 31 and the second evaporator 32 on two sides respectively, and mutual interference of the air flows to the two evaporators can be avoided. Further, the first air return opening 211 located at the top of the air return cavity and the second air return opening 221 located at the side surface of the air return cavity are respectively arranged on the first cover plate portion 21 and the second cover plate portion 22, so that the air return efficiency is higher, and the air flow circulation efficiency in the refrigeration equipment 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 refrigeration equipment is operated, 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 refrigeration equipment can be reduced to the set temperature so as to meet the actual refrigeration requirement of a user.

In some embodiments, the refrigeration appliance includes a liner 1, a return air cover 2, and an evaporator package 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. 4 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. Thus, the air flow in the refrigeration equipment 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 two sides respectively, so that the mutual interference of the air flows flowing 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 refrigeration plant 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 refrigeration plant flow through first return air inlet 211 and flow into the return air chamber return air efficiency higher, and then make the air current circulation efficiency in the refrigeration plant 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 refrigeration plant 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 refrigeration plant 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 refrigeration appliance includes a liner 1, a return air cover 2, and an evaporator package 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 refrigeration equipment 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 refrigeration equipment is in operation, 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, and after the articles in the storage cavity are refrigerated, 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 that communicates the first evaporator 31 and the second evaporator 32, so that the provision of two communicating evaporators can improve the refrigerating efficiency of the refrigerating apparatus. 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, and therefore the refrigerating effect of the refrigerating equipment 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 therein, 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 refrigeration equipment can flow out from the first side wall 11 and flow through the first evaporator 31 from the air return opening of the air return cover plate 2 for air flow 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, and the second inlet and the second outlet of the second evaporator 32 are arranged on one side close to the second fan 5, so that air flow of the refrigeration equipment can flow out of the second side wall 12 and flow through the second evaporator 32 from the air return opening of the air return cover plate 2 for air flow circulation. Like this, refrigeration plant's air current 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 refrigeration plant's forced air cooling refrigeration effect.

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.

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. A refrigeration appliance, comprising:

the inner container encloses an inner space and comprises a bottom wall;

the return air cover plate surrounds the evaporator cavity, and in the vertical direction, the setting height of the return air cover plate is higher than the bottom wall of the liner; and, a step of, in the first embodiment,

the evaporator is arranged in the evaporator cavity,

wherein, the ratio of the width of the return air cover plate to the width of the liner is 15% -40%.

2. A refrigeration device according to claim 1, wherein,

the ratio of the width of the return air cover plate to the width of the liner is 18% -32%.

3. A refrigeration device according to claim 2, wherein,

the ratio of the width of the return air cover plate to the width of the liner is 20% -25%.

4. A refrigerating apparatus as recited in any one of claims 1 to 3, wherein,

the height difference between the top surface and the bottom wall of the return air cover plate is greater than or equal to 300mm.

5. A refrigerating apparatus as recited in any one of claims 1 to 3, wherein,

the inner container defines an air supply duct with an air supply opening, and the return air cover plate is provided with a return air opening.

6. A refrigeration device according to claim 5, wherein,

the inner container comprises a first side wall and a second side wall which are arranged along the width direction,

wherein, the air supply outlet is offered to first lateral wall and/or second lateral wall.

7. The refrigeration appliance of claim 6 further comprising:

a step of a press cavity, which is arranged to be protruded upwards from the bottom wall of the inner container to enclose a press cavity for placing the compressor,

wherein, the press chamber sets up in the lower part in evaporimeter chamber, and the evaporimeter transversely sets up in the evaporimeter intracavity.

8. A refrigeration device according to claim 7, wherein,

the evaporator comprises a first end plate and a second end plate which are respectively arranged at two sides, and a heat conduction fin and a heat exchange tube which are arranged between the first end plate and the second end plate, wherein the heat conduction fin and the heat exchange tube form an effective heat exchange part of the evaporator,

The ratio of the width of the effective heat exchange part of the evaporator to the width of the return air cover plate is 70-95%.

9. A refrigeration device according to claim 8, wherein,

the ratio of the width of the effective heat exchange part of the evaporator to the width of the return air cover plate is 85% -95%.

10. A refrigeration device according to claim 9, wherein,

the refrigeration plant still includes the fan, and the fan includes spiral case volute tongue subassembly and sets up the wind wheel in spiral case volute tongue subassembly, and spiral case volute tongue subassembly includes:

the first volute and the first volute tongue are enclosed to form a first fan air outlet; and, a step of, in the first embodiment,

the second volute and the second volute tongue are enclosed to form a second fan air outlet, a first auxiliary connecting line is formed between the center of the wind wheel and the first volute tongue, a second auxiliary connecting line is formed between the center of the wind wheel and the second volute tongue,

the included angle between the first auxiliary connecting line and the second auxiliary connecting line is larger than 90 degrees and smaller than 180 degrees; or,

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,

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,

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.

11. A refrigeration device according to claim 10, wherein,

a first air supply duct and a second air supply duct are arranged on the first side wall of the inner container,

wherein, the first fan air outlet of fan is linked together with first air supply wind channel, and the second fan air outlet of fan is linked together with second air supply wind channel.

12. A refrigeration device according to claim 11, wherein,

the first air supply duct is arranged at the upper part of the second air supply duct.