freezer

Abstract

The present application relates to the technical field of refrigeration equipment and discloses a freezer. [Solution] A freezer includes a liner, a wind return cover, and an evaporator. The liner surrounds an interior space and defines a blower duct with a wind outlet. The wind return cover is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment. The outlet of the evaporator compartment is connected to the inlet of the wind duct, and the wind return cover is provided with a wind return opening, allowing airflow from the storage compartment to flow into the evaporator compartment through the wind return opening. The evaporator is located within the evaporator compartment. The relationship between the total volume V of the evaporator and the total area S of the wind return opening is yS = V, where y is 50 or greater. By setting the relationship between the total volume V of the evaporator and the total area S of the wind return opening to yS = V, where y is 50 or greater, the refrigeration demand of the freezer can be met. This makes the installation of the wind return opening in the freezer more rational, allowing the freezer to perform refrigeration effectively and meet actual refrigeration demand.

Description

[Technical Field]

[0001] This application is based on and claims priority from Chinese patent application number 202310197964.9, filed on March 3, 2023, Chinese patent application number 202320380409.5, filed on March 3, 2023, Chinese patent application number 202320391413.1, filed on March 3, 2023, Chinese patent application number 202310203157.3, filed on March 3, 2023, Chinese patent application number 202320385124.0, filed on March 3, 2023, and Chinese patent application number 2023101999918.2, filed on March 3, 2023. The entire contents of these Chinese patent applications are incorporated herein by reference.

[0002] The present application relates to the technical field of refrigeration devices, for example freezers. [Background technology]

[0003] Currently, refrigeration devices are widely used due to their ability to store food at low temperatures, and include refrigerators, freezers, etc. Based on the principle of refrigeration, freezers are generally divided into direct-cooling freezers and air-cooling freezers. Direct-cooling freezers are prone to frost formation on the box during use, while air-cooling freezers have the advantage of being frost-free, making them more popular with users. Summary of the Invention

[0004] In order to provide a basic understanding of some aspects of the disclosed embodiments, the following brief summary is presented. This summary is not a general description, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments. It is intended as a prelude to the detailed description that is presented below.

[0005] The embodiments of the present disclosure provide a freezer, which makes the installation of the air return port of the freezer more reasonable, so that the freezer can perform refrigeration effectively and meet the actual refrigeration demand.

[0006] In some embodiments, a freezer includes a liner, a wind return cover plate, and an evaporator. The liner surrounds and defines an interior space, and the liner defines an air duct having an air outlet. The wind return cover plate is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment, an outlet of the evaporator compartment communicates with an inlet of the air duct, and the wind return cover plate is provided with a wind return port, so that airflow within the storage compartment can flow into the evaporator compartment through the wind return port. The evaporator is located in the evaporator compartment. Here, the relationship between the total volume V of the evaporator and the total area S of the wind return port is yS=V, where y is 50 or greater. Optionally, y is 1000 or less. Optionally, y is 55 or greater and 700 or less.

[0007] Optionally, the air return cover plate includes a first cover plate portion and a second cover plate portion. The first cover plate portion is arranged horizontally. The second cover plate portion is arranged vertically and is connected to the first cover plate portion. Here, at least one of the first cover plate portion and the second cover plate portion is provided with an air return port.

[0008] Optionally, the freezer further includes a compressor chamber step, which protrudes upward from the bottom wall of the liner and includes a vertical step plate provided along the vertical direction and a horizontal step plate provided along the horizontal direction, and the compressor chamber step, together with the bottom wall of the liner, surrounds a compressor chamber in which the compressor is disposed, wherein the vertical step plate is connected to the second cover plate portion of the air return cover plate, and an air return port communicating with the evaporator chamber is provided in the vertical step plate at least at a position connected to the second cover plate portion, and the total area S of the air return ports is the sum of the areas of all the air return ports.

[0009] Optionally, a wind return cover plate is provided on top of the compressor chamber step.

[0010] Optionally, the evaporator includes a first evaporator and a second evaporator, the first evaporator being disposed at one end of the evaporator chamber and forming an angle with the horizontal direction that is equal to or smaller than a first angle, and the second evaporator being disposed at the other end of the evaporator chamber and forming an angle with the horizontal direction that is equal to or smaller than the first angle, where a total volume V of the evaporators is the sum of the volumes of the first evaporator and the second evaporator.

[0011] Optionally, the evaporator chamber includes a wind return chamber located between the first evaporator and the second evaporator, the first cover plate portion having a first wind return port located at a top of the wind return chamber, and the second cover plate portion having a second wind return port located at a side of the wind return chamber, wherein the area of ​​the first wind return port is equal to or greater than the area of ​​the second wind return port.

[0012] Optionally, the first air return port includes a plurality of first air return sections arranged in parallel, wherein a width of each first air return section is equal to or less than a first width threshold and / or a length of each first air return section is equal to or greater than a first length threshold.

[0013] Optionally, the liner includes a first sidewall, the first sidewall defining an air duct having an air outlet, wherein a fan is disposed within the air duct.

[0014] An embodiment of the present disclosure provides a freezer in which at least a portion of the connecting pipe is located within a foam layer in the evaporator chamber, thereby avoiding frost formation on all of the connecting pipes, which would affect the heat exchange efficiency of the connected evaporator, and thereby improving the refrigeration effect of the freezer.

[0015] In some embodiments, a freezer includes a liner, a wind return cover plate, and an evaporator group. The liner surrounds and defines an interior space, and defines an air duct having an air outlet. The wind return cover plate is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment. The outlet of the evaporator compartment communicates with the inlet of the air duct, and the wind return cover plate is provided with a wind return port, so that airflow within the storage compartment can flow into the evaporator compartment through the wind return port. The evaporator group includes a first evaporator and a second evaporator provided in the evaporator compartment, and a connecting pipe connecting the first evaporator and the second evaporator. Here, a foam layer is provided inside the evaporator compartment, and at least a portion of the connecting pipe is provided within the foam layer.

[0016] Optionally, the foam layer includes at least a bottom foam layer disposed at the bottom of the evaporator group, wherein at least a portion of the communicating pipe is disposed within the bottom foam layer.

[0017] Optionally, the first evaporator and the second evaporator are in series or parallel communication.

[0018] Optionally, the liner includes a first sidewall defining a first sidewall air duct having an air outlet, wherein a first fan is provided within the first sidewall air duct, and the first inlet and first outlet of the first evaporator are provided on a side adjacent to the first fan, and / or the liner includes a second sidewall defining a second sidewall air duct having an air outlet, wherein a second fan is provided within the second sidewall air duct, and the second inlet and second outlet of the second evaporator are provided on a side adjacent to the second fan.

[0019] Optionally, the communication pipe is provided below the first inlet and first outlet of the first evaporator, and / or the communication pipe is provided below the second inlet and second outlet of the second evaporator.

[0020] Optionally, the first evaporator includes a first group of heat exchange tubes and a first group of heated tubes at least partially disposed below the first group of heat exchange tubes, and / or the second evaporator includes a second group of heat exchange tubes and a second group of heated tubes at least partially disposed below the second group of heat exchange tubes.

[0021] Optionally, the freezer further comprises a compressor chamber step, the compressor chamber step being protruded upward from the bottom wall of the liner and being provided below the air return cover plate, and the compressor chamber step, together with the bottom wall of the liner, surrounds and forms a compressor chamber in which the compressor is disposed.

[0022] Optionally, the relationship between the sum V of the volumes of the first evaporator and the second evaporator and the total area S of the wind return ports is yS=V, where y is greater than or equal to 50. Optionally, y is less than or equal to 1000. Optionally, y is greater than or equal to 55 and less than or equal to 700.

[0023] An embodiment of the present disclosure provides a freezer, and by setting the distance between at least a portion of the connecting pipe and the heat transfer fin group to be equal to or less than the heat transfer distance, it is possible to prevent frost from forming on all of the connecting pipe, or to defrost the connecting pipe as quickly as possible after frost has formed, thereby improving the heat exchange efficiency of the evaporator and thereby increasing the refrigeration effect of the freezer.

[0024] In some embodiments, a freezer includes a liner, an air return cover plate, and an evaporator group. The liner surrounds and defines an interior space, and the liner defines an air duct having an air outlet. The air return cover plate is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment. The outlet of the evaporator compartment communicates with the inlet of the air duct, and the air return cover plate is provided with an air return port, so that airflow within the storage compartment can flow into the evaporator compartment through the air return port. The evaporator group includes a first evaporator and a second evaporator provided in the evaporator compartment, and a connecting pipe connecting the first evaporator and the second evaporator. Here, the evaporator group includes a heat transfer fin group and a heat exchange pipe group penetrating the heat transfer fin group, and the distance between at least a portion of the connecting pipe and the heat transfer fin group is equal to or less than a heat transfer distance.

[0025] Optionally, the heat transfer distance is 10 mm or less.

[0026] Optionally, the evaporator chamber includes a return air chamber located between the first evaporator and the second evaporator, wherein at least a portion of the communication pipe is provided in the return air chamber.

[0027] Optionally, the first evaporator includes a first heat transfer fin group, and the connecting pipe includes a first bent pipe segment that is spaced apart from the first heat transfer fin group by less than or equal to the heat transfer distance, and / or the second evaporator includes a second heat transfer fin group, and the connecting pipe includes a second bent pipe segment that is spaced apart from the second heat transfer fin group by less than or equal to the heat transfer distance.

[0028] Optionally, a first inlet and a first outlet of the first evaporator are provided toward the side of the return air chamber, and / or a second inlet and a second outlet of the second evaporator are provided toward the side of the return air chamber.

[0029] Optionally, the freezer further comprises a compressor, the compressor being disposed below said evaporator group.

[0030] The embodiments of the present disclosure provide a freezer that can more rationally install multiple evaporators at intervals, so that the freezer can effectively perform refrigeration and meet actual refrigeration demands.

[0031] In some embodiments, a freezer includes a liner, a wind return cover plate, and an evaporator group. The liner surrounds and defines an interior space, and defines a blowing duct having a blowing port. The wind return cover plate is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment, an outlet of the evaporator compartment communicates with an inlet of the blowing duct, and the wind return cover plate is provided with a wind return port so that airflow within the storage compartment can flow into the evaporator compartment through the wind return port. The evaporator group includes a first evaporator and a second evaporator located in the evaporator compartment, and the evaporator compartment includes a wind return chamber located between the first and second evaporators, and a distance L between the first and second evaporators satisfies L≧S / (a′+c′). Here, S is the total area of ​​the wind return port, a' and c' are the lengths of two different positions of the wind return chamber or the first evaporator, respectively, and at least one of the two different positions is close to the wind return port.

[0032] Optionally, the wind return cover plate includes a first cover plate portion provided along a horizontal direction, and the first cover plate portion is provided with a first wind return port located at a top of the wind return chamber, where a' is the length of a position in the wind return chamber close to the first wind return port, and a' is equal to or greater than the length of the first wind return port and equal to or less than the entire length of the first cover plate portion along the length direction of the first wind return port.

[0033] Optionally, the first evaporator includes a first rib proximate the first air return port and having a first length a, where the length of a' is equal to the first length a of the first rib.

[0034] Optionally, the wind return cover plate further includes a second cover plate portion provided along the vertical direction, and the second cover plate portion is provided with a second wind return port located on a side surface of the wind return chamber, where c' is the length of a position in the wind return chamber close to the second wind return port, and c' is equal to or greater than the length of the second wind return port and equal to or less than the total length of the second cover plate portion along the length direction of the second wind return port.

[0035] Optionally, the first evaporator includes a second rib proximate the second wind return port and having a second length c, where the length of c' is equal to the second length c of the second rib.

[0036] Optionally, the first evaporator is at an angle with the horizontal that is less than or equal to a first angle, and / or the second evaporator is at an angle with the horizontal that is less than or equal to a first angle.

[0037] Optionally, the relationship between the total volume V of the evaporator group and the total area S of the wind return ports is yS=V, where y is greater than or equal to 50. Optionally, y is less than or equal to 1000.

[0038] The embodiment of the present disclosure provides a freezer, and by providing a horizontal insulating gap between the evaporator and the side cover plate, the evaporator is insulated, thereby avoiding loss of cooling capacity of the evaporator and ensuring the heat exchange effect between the airflow inside the freezer and the evaporator, thereby improving the refrigeration effect of the freezer.

[0039] In some embodiments, a freezer includes a liner, a wind return cover plate, an evaporator, and a compressor. The liner surrounds and defines an interior space, and the liner defines an air duct having an air outlet. The wind return cover plate is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment in which an evaporator is provided. The outlet of the evaporator compartment communicates with the inlet of the air duct, and the wind return cover plate is provided with a wind return opening, allowing airflow within the storage compartment to flow into the evaporator compartment through the wind return opening. The compressor is provided below the evaporator. Here, the wind return cover plate includes a side cover plate portion, and a horizontal insulating gap m is provided between the evaporator and the side cover plate portion.

[0040] Optionally, the horizontal insulating spacing m is 2 mm or more, and / or the horizontal insulating spacing m is 50 mm or less.

[0041] Optionally, the air return cover plate includes a first cover plate portion arranged along a horizontal direction, wherein a vertical insulating gap n is provided between the evaporator and the first cover plate portion.

[0042] Optionally, the vertical adiabatic spacing n is 2 mm or more, and / or the vertical adiabatic spacing n is 50 mm or less.

[0043] Optionally, horizontal insulation interval m is filled with insulation material, and / or vertical insulation interval n is filled with insulation material.

[0044] Optionally, the liner includes a first sidewall, the first sidewall defining an air duct having an air outlet, wherein a fan is disposed within the air duct.

[0045] Optionally, the depth g of the volute casing of the fan is greater than or equal to 50 mm, and / or the depth g of the volute casing of the fan is less than or equal to 150 mm.

[0046] Optionally, the distance h between the outside of the volute casing of the fan and the evaporator is 10 mm or more, and / or the distance h between the outside of the volute casing of the fan and the evaporator is 200 mm or less.

[0047] Optionally, the freezer further comprises a compressor chamber step, the compressor chamber step being protruded upward from the bottom wall of the liner and being provided below the air return cover plate, and the compressor chamber step, together with the bottom wall of the liner, surrounds and forms a compressor chamber in which the compressor is disposed.

[0048] The embodiments of the present disclosure provide a fan and a freezer, which can reduce the temperature difference between different positions in the freezer, improve the temperature uniformity of the freezer, enhance the air-cooling effect of the freezer, and reduce energy consumption.

[0049] In some embodiments, the fan includes a volute casing and volute tongue assembly and a wind turbine disposed within the volute casing and volute tongue assembly. The volute casing and volute tongue assembly includes a first volute casing and a first volute tongue and a second volute casing and a second volute tongue. The first volute casing and the first volute tongue surround and define a first fan outlet. The second volute casing and the second volute tongue surround and define a second fan outlet. The center of the wind turbine and the first volute tongue form a first auxiliary connecting line, and the center of the wind turbine and the second volute tongue form a second auxiliary connecting line, with an angle between the first auxiliary connecting line and the second auxiliary connecting line being greater than 90° and less than 180°.

[0050] Optionally, the angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 100° and less than or equal to 140°, or greater than 130° and less than or equal to 140°, or greater than 170° and less than 180°.

[0051] In some embodiments, a freezer includes a liner and a fan. The liner surrounds and defines an interior space, and includes a first sidewall, with a first air duct and a second air duct provided in the first sidewall. The fan includes a first fan outlet communicating with the first air duct and a second fan outlet communicating with the second air duct. Here, the fan is the fan described above.

[0052] Optionally, the first blowing duct is provided in an upper part of the first side wall, and the second blowing duct is provided in a lower part of the first side wall, wherein an angle between a second auxiliary connecting line formed by the center of the wind turbine and the second spiral tongue and a vertical line is between 20° and 60°, or between 20° and 40°.

[0053] Optionally, the first blower duct includes a first expanded pressure section duct directly communicating with the first fan outlet and a first constant pressure section duct communicating with the first expanded pressure section duct. The second blower duct includes a second expanded pressure section duct directly communicating with the second fan outlet and a second constant pressure section duct communicating with the second expanded pressure section duct. Here, the total area of ​​the outlets of the first constant pressure section duct is larger than the area of ​​the outlets of the second constant pressure section duct.

[0054] Optionally, the first air duct includes a first end outlet remote from the fan, the second air duct includes a second end outlet remote from the fan, and the liner includes end sidewalls proximate to the first and second end outlets, wherein a horizontal distance between the first end outlet and the end sidewall is a first end spacing, and a horizontal distance between the second end outlet and the end sidewall is a second end spacing, and the first end spacing is less than the second end spacing.

[0055] Optionally, the difference between the first end spacing and the second end spacing is equal to or greater than the length of one air outlet of the first air duct, or the difference between the first end spacing and the second end spacing is equal to or greater than the length of one air outlet of the second air duct.

[0056] Optionally, the freezer further includes a wind return cover plate, an evaporator, and a compressor. The wind return cover plate is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment, the outlet of the evaporator compartment is connected to the inlets of the first air duct and the second air duct, and the wind return cover plate is provided with a wind return port, so that airflow within the storage compartment can flow into the evaporator compartment through the wind return port. The evaporator is provided in the evaporator compartment. The compressor is provided below the evaporator compartment. The freezer provided by the embodiments of the present disclosure can achieve the following technical effects.

[0057] A freezer provided by an embodiment of the present disclosure includes a liner, a return airflow cover, and an evaporator. The liner defines a blower duct with a blower outlet, providing a cooling airflow to an interior space enclosed by the inner liner, thereby lowering the temperature of the interior space. The return airflow cover is provided with a return airflow. During operation, airflow in the evaporator chamber passes through the evaporator to cool it down, then flows into the blower duct by the drive of a fan, then flows through the blower outlet into the storage chamber, cooling the items in the storage chamber, and then returns to the evaporator chamber through the return airflow. The relationship between the total volume V of the evaporator and the total area S of the return airflows satisfies yS=V, where y is set to be 50 or greater to meet the refrigeration demand of the freezer. This allows for more flexibility in the installation of the return airflows of the freezer, allowing the freezer to perform refrigeration effectively and meet the actual refrigeration demand.

[0058] A freezer provided by an embodiment of the present disclosure includes a liner, a wind return cover plate, and an evaporator group. The evaporator group includes a first evaporator and a second evaporator provided in an evaporator chamber, and a connecting pipe connecting the first evaporator and the second evaporator. By providing two connected evaporators in this manner, the refrigeration efficiency of the freezer can be improved. By providing at least a portion of the connecting pipe within a foam layer in the evaporator chamber, frost formation on all of the connecting pipes can be prevented from affecting the heat exchange efficiency of the connected evaporators, thereby improving the refrigeration efficiency of the freezer.

[0059] A freezer provided by an embodiment of the present disclosure includes a liner, an air return cover plate, and an evaporator group. The evaporator group includes a first evaporator and a second evaporator provided in an evaporator chamber, and a connecting pipe connecting the first evaporator and the second evaporator. By providing two connected evaporators in this manner, the refrigeration efficiency of the freezer can be improved. By setting the distance between at least a portion of the connecting pipe and the heat transfer fin group to be equal to or less than the heat transfer distance, it is possible to prevent frost from forming on all of the connecting pipe or to defrost the connecting pipe as quickly as possible after frost has formed, thereby improving the heat exchange efficiency of the evaporator and thereby increasing the refrigeration effect of the freezer.

[0060] A freezer provided by an embodiment of the present disclosure includes a liner, a wind return cover plate, and an evaporator group. The evaporator group includes a first evaporator and a second evaporator disposed in an evaporator chamber, and the evaporator chamber includes a wind return chamber located between the first and second evaporators. Airflow within the freezer flows through a wind return port into the wind return chamber and then flows to the first and second evaporators on both sides, respectively, thereby preventing mutual interference between the airflows flowing through the two evaporators. The distance L between the first and second evaporators is set to satisfy the formula L≧S / (a'+c'), where S is the total area of ​​the wind return port, and a' and c' are the lengths of two different positions of the wind return chamber or the first evaporator, respectively. Since at least one of the two different positions is adjacent to the wind return port, the spacing between the evaporators can be more rational, allowing the freezer to perform efficient refrigeration and meet actual refrigeration demand.

[0061] A freezer provided by an embodiment of the present disclosure includes a liner, a wind return cover plate, an evaporator, and a compressor, wherein the wind return cover plate includes a side cover plate portion, and a horizontal insulating gap m is provided between the evaporator and the side cover plate portion to insulate the evaporator, thereby preventing loss of cooling capacity of the evaporator and ensuring the heat exchange effect between the airflow in the freezer and the evaporator, thereby improving the refrigeration effect of the freezer.

[0062] A freezer provided by an embodiment of the present disclosure includes a liner and a fan. The liner surrounds and forms an interior space, and a first air duct and a second air duct are provided on a first side wall of the liner, providing cooling airflow into the interior space surrounded by the liner and lowering the temperature of the interior space. The fan includes a volute casing and volute tongue assembly and a windmill provided within the volute casing and volute tongue assembly. The first volute casing and the first volute tongue of the volute casing and volute tongue assembly surround and form a first fan outlet, and the second volute casing and the second volute tongue surround and form a second fan outlet. The first air duct and the second air duct on the first side wall of the liner are connected to the first fan outlet and the second fan outlet, respectively. When the fan is driven, cooling air flows through the first and second air ducts and enters the interior space surrounded by the liner, thereby lowering the temperature of the interior space. The center of the fan and the first spiral tongue form a first auxiliary connecting line, and the center of the fan and the second spiral tongue form a second auxiliary connecting line. The angle between the first auxiliary connecting line and the second auxiliary connecting line is set to be greater than 90° but less than 180°, allowing for precise control of the amount of air blown into each duct by the fan. This allows for precise control of the amount of air blown into the interior space by the first and second air ducts, thereby reducing the temperature difference between different locations in the freezer, improving the temperature uniformity of the freezer, enhancing the air-cooling effect of the freezer, and reducing energy consumption.

[0063] The general description above and the following description are exemplary and explanatory only and are not intended to be limiting of the present application. [Brief explanation of the drawings]

[0064] One or more embodiments are illustratively described with accompanying drawings. These illustrative descriptions and drawings are not intended to be limiting of the embodiments, and elements in the drawings having the same reference numerals are designated as similar elements, and the drawings are not intended to be limiting to scale. [Figure 1]FIG. 1 is a schematic diagram illustrating the structure of a freezer provided by an embodiment of the present disclosure. [Figure 2] 1 is a schematic diagram showing a combined structure of a liner and a wind return cover plate provided by an embodiment of the present disclosure. [Figure 3] 1 is a schematic diagram illustrating a combined structure of a liner and evaporator group provided by an embodiment of the present disclosure. [Figure 4] 1 is a schematic diagram illustrating a cross-sectional structure of a liner and evaporator group provided by an embodiment of the present disclosure. [Figure 5] FIG. 2 is a schematic diagram showing the combined structure of the air return cover plate and the evaporator group provided by an embodiment of the present disclosure. [Figure 6] FIG. 10 is a schematic diagram showing another combination structure of a return air cover plate and an evaporator group provided by an embodiment of the present disclosure. [Figure 7] FIG. 2 is a schematic diagram illustrating the relative positional structure of two evaporators provided by an embodiment of the present disclosure. [Figure 8] FIG. 2 is a schematic diagram showing a combined structure of two evaporators provided by an embodiment of the present disclosure. [Figure 9] FIG. 10 is a schematic diagram showing another combination structure of a return air cover plate and an evaporator group provided by an embodiment of the present disclosure. [Figure 10] FIG. 2 is a schematic diagram illustrating a combined structure of a fan and a blower duct provided by an embodiment of the present disclosure. [Figure 11] FIG. 1 is a schematic diagram illustrating a structure of a fan provided by an embodiment of the present disclosure. [Figure 12] FIG. 10 is a schematic diagram illustrating another fan structure provided by an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0065] In order to more fully understand the features and technical contents of the embodiments of the present disclosure, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference purposes only and are not intended to limit the embodiments of the present disclosure. In the following technical description, for ease of explanation, several details are described to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments can still be implemented without these details. In other cases, well-known structures and devices may be shown in simplified form to simplify the drawings.

[0066] In the description and claims of the embodiments of the present disclosure, as well as in the above-described drawings, the terms "first," "second," etc. are used to distinguish between similar objects without being used to describe a particular order or priority. It should be understood that data so used are interchangeable where appropriate to describe the embodiments described in this disclosure. Furthermore, the terms "comprises," "has," and "have," as well as variations thereof, are intended to cover a non-exclusive inclusion.

[0067] In the embodiments of the present disclosure, the orientations or positional relationships indicated by terms such as "upper," "lower," "inner," "middle," "outer," "front," and "rear" are orientations or positional relationships based on the drawings. These terms are primarily intended to better describe the embodiments of the present disclosure and the embodiments thereof, and are not intended to limit the illustrated devices, elements, or components to have a specific orientation or to be configured and operated in a specific orientation. Furthermore, some of the above terms can be used to express orientations or positional relationships, as well as to express other meanings. For example, the term "upper" can also be used to express a dependency or connection relationship in some cases. The specific meanings of these terms in the embodiments of the present disclosure can be understood by those skilled in the art depending on the specific circumstances.

[0068] Furthermore, terms such as "provide," "connect," and "fixed" should be understood broadly. For example, "connect" may mean a fixed connection, a detachable connection, or an integral connection, a mechanical connection, an electrical connection, a direct connection, an indirect connection via an intermediate medium, or an internal communication between two devices, elements, or components. The specific meanings of the above terms in the embodiments of the present disclosure can be understood by those skilled in the art depending on the specific circumstances.

[0069] Unless otherwise specified, the term "plurality" means two or more.

[0070] The term "and / or" describes an associative relationship between objects and means that a triple relationship can exist, for example, A and / or B represents a triple relationship with A, or B, or A and B.

[0071] It should be noted that the embodiments and features of the embodiments of the present disclosure can be combined with each other as long as they do not conflict.

[0072] As shown in Figures 1 to 9, an embodiment of the present disclosure provides a freezer, particularly an air-cooled freezer, specifically an air-cooled horizontal freezer. The freezer includes a case and a door 7, and the door 7 is movably disposed above the case. The case includes a housing 6, a liner 1, and a thermal insulation material, and the liner 1 is located inside the housing 6, and the thermal insulation material is located between the housing 6 and the liner 1.

[0073] The liner 1 includes a bottom wall 13 and side walls, which include a front wall, a rear wall, a left side wall, and a right side wall. The front wall and the rear wall are opposed to each other and are located at the front and rear ends of the bottom wall 13, respectively, and both the front wall and the rear wall extend upward. The left side wall and the right side wall are opposed 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 wall, the rear wall, the left side wall, and the right side wall collectively enclose and form an internal space. The internal space has an opening that faces upward, and the door 7 movably covers the opening above.

[0074] In the present application, for ease of explanation, the front-rear direction is defined as the width direction, and the left-right direction is defined as the length direction.

[0075] An embodiment of the present disclosure provides a freezer, in which a 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 being arranged along the width direction of the liner 1, and the first side wall 11 and the second side wall 12 both defining an air duct having an air outlet 15. Here, the first side wall 11 and the second side wall 12 may be arranged along the width direction of the liner 1, i.e., the first side wall 11 may be a rear side wall or a front side wall, and accordingly, the second side wall 12 may be a front side wall or a rear side wall. It can be understood that the front side wall and the rear side wall both define an air duct having an air outlet 15. This allows air to be blown out of the interior space, thereby achieving air cooling.

[0076] The freezer further includes a ventilation cover plate 2, which is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment. The outlet of the evaporator compartment is connected to the inlet of the air supply duct. The ventilation cover plate 2 is provided with a ventilation port, through which airflow from the storage compartment can flow into the evaporator compartment. The storage compartment is used to store items that require freezing, such as meat, seafood, and tea leaves. The evaporator compartment is used to generate cool air, which flows from the evaporator compartment to the ventilation duct and enters the storage compartment through the ventilation port 15. After exchanging heat with the items in the storage compartment, the cool air returns to the evaporator compartment and is cooled again. The cooled air then flows back into the ventilation duct and circulates. This realizes air circulation within the freezer and achieves air-cooled refrigeration in the freezer.

[0077] The air return cover plate 2 may have various shapes, such as an L-shape or an inclined shape. The evaporator chamber may have a variety of shapes and be located at different positions in the interior space. For example, the evaporator chamber may be located at the left end, middle, or right end of the interior space. In actual application, the layout of the evaporator chamber and storage chamber can be determined according to the structure of the interior space of the freezer.

[0078] The freezer further includes an evaporator and a fan 5 disposed in the evaporator compartment. Optionally, the fan 5 and the air duct are located on the same side wall, and the fan 5 is connected to the air duct. The fan 5 can drive the airflow through the evaporator compartment, the air duct, and the storage compartment, and then return to the evaporator compartment through the air return port, thus forming a circulating airway. Here, the evaporator is used to exchange heat with the airflow in the evaporator compartment to generate cool air. The fan 5 provides power for the airflow. Because the fan 5 and the air duct are both located on the same side wall, the airflow from the fan 5 does not need to pass through a right-angle corner before flowing into the air duct, reducing airflow loss, improving the refrigeration effect of the freezer, and reducing energy consumption.

[0079] In some embodiments, a freezer includes a liner 1, a wind return cover plate 2, and an evaporator. The liner 1 surrounds and defines an interior space, defining a blower duct with a blower opening 15. The wind return cover plate 2 is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment. The outlet of the evaporator compartment is connected to the inlet of the blower duct. The wind return cover plate 2 is provided with a wind return opening, allowing airflow within the storage compartment to flow into the evaporator compartment through the wind return opening. The evaporator is located within the evaporator compartment. The relationship between the total volume V of the evaporator and the total area S of the wind return opening is yS=V, where y is 50 or greater.

[0080] As shown in Figure 9, taking two evaporators and two air return ports as an example, if the total volume of the two evaporators is V, the area of ​​the first air return port 211 is S1, and the area of ​​the second air return port 221 is S2, the total area S of the air return ports is the sum of the areas of the first air return port 211 and the second air return port 221. Optionally, y is 1000 or less.

[0081] In this way, depending on the actual refrigeration temperature requirement, the actual refrigeration demand when the user uses the freezer can be met by setting y to 1000 or less, provided that the relationship between the total volume V of the evaporator and the total area S of the air return port satisfies yS=V (where y is 50 or more).

[0082] The air return cover plate 2 is provided with an air return port. During freezer operation, airflow from the evaporator chamber passes through the evaporator to cool. Driven by fan 5, it then flows into the air duct and then through air outlet 15 into the storage chamber, freezing the items in the storage chamber before returning through the air return port into the evaporator chamber, thereby forming a circulation airway for the freezer. During the air circulation process, if the air pressure is constant and the width of the air duct and the area of ​​air outlet 15 are sufficiently large, the size or area of ​​the air return port is one of the major factors affecting the amount of air blown during the air circulation process. In the embodiment of the present disclosure, 50≦y≦1000 is satisfied, improving the amount of air blown from air outlet 15 in the circulation airway of the freezer.

[0083] The total volume of the evaporator, V, is in mm 3 , i.e., cubic millimeters, and the total area S of the wind return port is in mm 2 , i.e., square millimeters, and it can be understood that the value of y can be calculated in this measurement unit. y can also be a unitless constant.

[0084] Optionally, y is greater than or equal to 55 and less than or equal to 700.

[0085] In the embodiment of the present disclosure, both the temperature drop rate and the freezing depth of the freezer are improved when 55≦y≦700. Hereinafter, an example will be described in which the number of evaporators in the evaporator chamber is one. JPEG2026504528000002.jpg62170

[0086] As can be seen from Table 1 above, if the length, width and height of the evaporator are 196mm, 180mm and 100mm respectively, the volume of the evaporator is 3528000mm. 3 According to the formula yS=V, different y values ​​can be calculated when the total area of ​​the wind return port is different.

[0087] In Table 1, the y value of Example 1 is 50, the y value of Example 2 is 56, the y value of Example 3 is 216, the y value of Example 4 is 266, the y value of Example 5 is 574, and the y value of Example 6 is 985. Here, the energy efficiency levels of Examples 3 and 4 are Grade 1, and the energy efficiency levels of Examples 2 and 5 are Grade 2, which are significantly higher than the energy efficiency levels of Examples 1 and 6, which are Grade 3. That is, when 55≦y≦700, the freezer can have a good energy efficiency level. Optionally, 100≦y≦500.

[0088] In terms of the parameter "temperature drop rate," the temperature drop rates of Examples 1, 2, 3, and 4 are 97 minutes, 83 minutes, 90 minutes, and 121 minutes, respectively, which are significantly faster than the temperature drop rates of Examples 5 and 6. Furthermore, in terms of the parameter "freezing depth," the freezing depths of Examples 3 and 4 are -29°C and -27.6°C, respectively, which are significantly lower than the freezing depths of Examples 1, 2, 5, and 6. Here, the temperature drop rate refers to the length of time it takes for a freezer to drop from ambient temperature to -18°C, and the freezing depth refers to the lowest temperature the freezer can reach. Furthermore, in terms of the parameter "power consumption," the power consumptions of Examples 3 and 4 are 1.03 kW·h / 24h and 1.14 kW·h / 24h, respectively, which are significantly lower than the power consumptions of Examples 1, 2, 5, and 6. Optionally, 100≦y≦500.

[0089] Considering the three test parameters of cooling rate, freezing depth, and power consumption, when the y values ​​of Examples 3 and 4 are 216 and 266 respectively, the freezers can guarantee a constant cooling rate, while achieving low freezing depth and low power consumption, which are in the first-class energy efficiency category, and are significantly superior to Examples 1, 2, 5, and 6.

[0090] It can be understood that even when the value of y is other values ​​between 100 and 500, the freezer can achieve the effect of the primary energy efficiency of Example 3 or Example 4.

[0091] Optionally, the wind return cover plate 2 includes a first cover plate portion 21 and a second cover plate portion 22. The first cover plate portion 21 is provided along the horizontal direction. The second cover plate portion 22 is provided along the vertical direction and is connected to the first cover plate portion 21. Here, at least one of the first cover plate portion 21 and the second cover plate portion 22 is provided with a wind return port.

[0092] 2 and 5, the air return cover plate 2 includes a first cover plate portion 21 provided horizontally and a second cover plate portion 22 provided vertically, and the first cover plate portion 21 and the second cover plate portion 22 are connected to each other. Here, the first cover plate portion 21 and the second cover plate portion 22 may be connected detachably or non-detachably. Furthermore, an air return port is provided in at least one of the first cover plate portion 21 and the second cover plate portion 22 to circulate air within the freezer when the freezer is in operation.

[0093] It can be understood that one or more wind return ports are provided in the wind return cover plate 2. For example, when there is one wind return port, the wind return port is provided in the first cover plate part 21, or the wind return port is provided in the second cover plate part 22. When there are multiple wind return ports, the wind return ports may be provided only in the first cover plate part 21 or the second cover plate part 22, or some may be provided in the first cover plate part 21 and the other parts may be provided in the second cover plate part 22.

[0094] Optionally, the freezer also includes a compressor chamber step 14. The compressor chamber step 14 is provided to protrude upward from the bottom wall 13 of the liner 1 and includes a vertical step plate provided along the vertical direction and a horizontal step plate provided along the horizontal direction, and the compressor chamber step 14, together with the bottom wall 13 of the liner 1, surrounds and forms a compressor chamber in which the compressor 4 is disposed. Here, the vertical step plate is connected to the second cover plate portion 22 of the air return cover plate 2, and an air return port communicating with the evaporator chamber is provided in the vertical step plate at least at a position connected to the second cover plate portion 22, and the total area S of the air return ports is the sum of the areas of all the air return ports.

[0095] Since components such as the compressor 4 and condenser need to be placed in the liner, the compressor chamber step 14 protruding upward from the bottom wall 13 of the liner 1 includes a vertical step plate provided along the vertical direction and a horizontal step plate provided along the horizontal direction, and together with the bottom wall 13 of the liner 1, can surround and form a compressor chamber for placing the compressor 4. Furthermore, at the position where the vertical step plate and the second cover plate portion 22 are connected, an air return port communicating with the evaporator chamber is provided, which can be used to circulate air inside the freezer. Optionally, a wind return cover plate 2 is provided on top of the compressor chamber step 14 .

[0096] It can be seen that the air return cover plate 2 is provided above the compressor chamber step 14, so that the air return cover plate 2, the compressor chamber step 14 and the liner 1 can form an evaporator chamber surrounding the evaporator chamber for arranging the evaporator. In this way, the evaporator is located above the compressor chamber step 14, so that the evaporator does not occupy excessively the internal space of the liner 1, ensuring the storage volume of the storage chamber and making the evaporator chamber more compact, reducing the feeling of heaviness inside the freezer.

[0097] Optionally, the evaporator includes a first evaporator 31 and a second evaporator 32. The first evaporator 31 is provided at one end of the evaporator chamber and forms an angle with the horizontal direction that is equal to or smaller than a first angle. The second evaporator 32 is provided at the other end of the evaporator chamber and forms an angle with the horizontal direction that is equal to or smaller than the first angle. Here, the total volume V of the evaporator is the sum of the volumes of the first evaporator 31 and the second evaporator 32.

[0098] By arranging the first evaporator 31 and the second evaporator 32 so 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 refrigeration efficiency inside the freezer can be improved. Furthermore, by setting the angle between the first evaporator 31 and the second evaporator 32 and the horizontal to be equal to or less than a first angle, the first evaporator 31 and the second evaporator 32 can be inclined, which helps to discharge defrost water. Specifically, the first angle may be 10°, 15°, 20°, 25°, or 30°. Both the first evaporator 31 and the second evaporator 32 are provided with drain ports, and the first evaporator 31 and the second evaporator 32 are inclined toward the drain ports so that defrost water generated in the first evaporator 31 and the second evaporator 32 can flow out of the freezer through the drain ports.

[0099] Optionally, the evaporator chamber includes a wind return chamber located between the first evaporator 31 and the second evaporator 32, the first cover plate portion 21 being provided with a first wind return port 211 located at an upper portion of the wind return chamber, and the second cover plate portion 22 being provided with a second wind return port 221 located at a side surface of the wind return chamber. Here, the area of ​​the first wind return port 211 is equal to or larger than the area of ​​the second wind return port 221.

[0100] In this way, a wind return chamber is provided between the first evaporator 31 and the second evaporator 32, and the airflow inside the freezer flows into the wind return chamber through the wind return port and then flows into the first evaporator 31 and the second evaporator 32 on both sides, thereby preventing the airflows flowing into the two evaporators from interfering with each other. Furthermore, the first cover plate 21 and the second cover plate 22 are each provided with a first wind return port 211 located at the top of the wind return chamber and a second wind return port 221 located on the side of the wind return chamber, which can further increase the return efficiency and therefore the air circulation efficiency inside the freezer.

[0101] Optionally, the first wind return port 211 includes a plurality of first wind return sections 2111 arranged in parallel, wherein the width of the first wind return section 2111 is equal to or less than a first width threshold, and / or the length of the first wind return section 2111 is equal to or greater than a first length threshold.

[0102] In this way, by arranging multiple first air return sections 2111 side by side in the first air return port 211, the airflow can pass through the first air return port 211 more effectively and enter the air return chamber, thereby improving the airflow return efficiency. Furthermore, the width of the first air return section 2111 may be set to be equal to or less than the first width threshold, or the length of the first air return section 2111 may be set to be equal to or greater than the first length threshold, or the width of the first air return section 2111 may be set to be equal to or less than the first width threshold and the length of the first air return section 2111 may be set to be equal to or greater than the first length threshold. This makes it possible to maintain a constant air return area for the first air return section 2111, and ultimately ensures the airflow return efficiency of the entire first air return port 211.

[0103] Optionally, a wind return guide plate 2112 is provided above the first wind return port 211 .

[0104] As shown in Figure 5, by providing a wind return guide plate 2112 above the first wind return port 211, the flow diversion effect of the wind return guide plate 2112 allows the airflow to flow directly into the wind return chamber and then to the evaporator, thereby reducing airflow turbulence.

[0105] Optionally, the liner 1 includes a first sidewall 11, which defines an air duct having an air outlet 15. Here, a fan 5 is provided within the air duct.

[0106] In this way, the first side wall 11 of the liner 1 defines an air duct having an air outlet 15, and a fan 5 is installed in the air duct. When the freezer is in operation, the air in the evaporator chamber passes through the evaporator to reduce its temperature, then flows into the air duct by the operation of the fan 5, and then flows into the storage chamber through the air outlet 15, cooling the items in the storage chamber, before returning to the evaporator chamber through the air return port. This allows the temperature inside the freezer to be reduced to the set temperature, meeting the user's actual refrigeration needs.

[0107] In some embodiments, a freezer includes a liner 1, a wind return cover plate 2, and an evaporator group 3. The liner 1 surrounds and defines an interior space, and defines an air duct having an air outlet 15. The wind return cover plate 2 is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment in which an evaporator is provided. The outlet of the evaporator compartment communicates with the inlet of the air duct, and the wind return cover plate 2 is provided with a wind return port, so that airflow within the storage compartment can flow into the evaporator compartment through the wind return port. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator compartment. The evaporator compartment includes a wind return chamber located between the first evaporator 31 and the second evaporator 32. The distance L between the first evaporator 31 and the second evaporator 32 satisfies L≧S / (a′+c′). Here, S is the total area of ​​the wind return port, a' and c' are the lengths of two different positions of the wind return chamber or the first evaporator 31, respectively, and at least one of the two different positions is close to the wind return port.

[0108] As shown in FIGS. 3 and 7, the evaporator group 3 includes a first evaporator 31 and a second evaporator 32 installed in an evaporator chamber, which includes a return air chamber located between the first evaporator 31 and the second evaporator 32. Airflow in the freezer enters the return air chamber through the return air outlet and then flows to the first evaporator 31 and the second evaporator 32 on both sides, preventing interference between the airflows flowing through the two evaporators. By ensuring that the distance L between the first evaporator 31 and the second evaporator 32 satisfies L≧S / (a'+c'), where S is the total area of ​​the return air outlets, a' and c' are the lengths of the return air chamber or two different positions of the first evaporator 31, respectively, and at least one of the two different positions is adjacent to the return air outlet, the spacing between the evaporators can be more rationalized, allowing the freezer to perform refrigeration effectively and meet actual refrigeration demand.

[0109] As mentioned above, for yS=V, if the length, width, and height of the first and second evaporators are a, b, and c, respectively, and the volume of each is V, then L≧2V / y(a'+c') or L≧2abc / y(a'+c').

[0110] Optionally, the wind return cover plate 2 includes a first cover plate portion 21 provided along the horizontal direction, and the first cover plate portion 21 is provided with a first wind return port 211 located at the top of the wind return chamber. Here, a' is the length of a position in the wind return chamber close to the first wind return port 211, and a' is equal to or greater than the length of the first wind return port 211 and equal to or less than the entire length of the first cover plate portion 21 along the length direction of the first wind return port 211.

[0111] In this way, the first cover plate portion 21 is provided with the first air return port 211 located at the top of the air return chamber, and the return efficiency of the airflow inside the freezer can be increased as it flows into the air return chamber through the first air return port 211, thereby increasing the airflow circulation efficiency inside the freezer compartment. The length of the position inside the air return chamber close to the first air return port 211 is defined as a', and by making a' equal to or greater than the length of the first air return port 211 and equal to or less than the entire length of the first cover plate portion 21 along the length direction of the first air return port 211, the contact surface between the airflow entering the air return chamber from the first air return port 211 and the evaporator can be increased, thereby increasing the heat exchange efficiency of the evaporator.

[0112] Optionally, the first evaporator 31 includes a first rib 311 adjacent to the first air return port 211 and having a first length a, where the length a′ is equal to the first length a of the first rib 311.

[0113] In this way, the first evaporator 31 includes a first rib 311 that is close to the first air return port 211 and has a first length a, i.e., one side of the airflow surface of the first evaporator 31. By setting the length of a' equal to the first length a of the first rib 311, it is possible to increase the contact area between the airflow surface of the first evaporator 31 and the air return chamber, thereby further improving the heat exchange efficiency of the evaporator.

[0114] Optionally, the wind return cover plate 2 further includes a second cover plate portion 22 provided along the vertical direction, and the second cover plate portion 22 is provided with a second wind return port 221 located on a side surface of the wind return chamber. Here, c' is the length of a position in the wind return chamber close to the second wind return port 221, and c' is equal to or greater than the length of the second wind return port 221 and equal to or less than the entire length of the second cover plate portion 22 along the length direction of the second wind return port 221.

[0115] In this way, the second cover plate portion 22 is provided with the second air return chamber 221 located on the side of the air return chamber, which can further increase the return efficiency of the airflow inside the freezer flowing into the air return chamber through the second air return port 221, and therefore can further increase the airflow circulation efficiency inside the freezer. By setting the length of a position inside the air return chamber close to the second air return port 221 to c' and making c' equal to or greater than the length of the second air return port 221 and equal to or less than the entire length of the second cover plate portion 22 along the length direction of the second air return port 221, the contact surface between the airflow entering the air return chamber from the second air return port 221 and the evaporator can be increased, and therefore the heat exchange efficiency of the evaporator can be increased.

[0116] Optionally, the first evaporator 31 includes a second rib 312 adjacent to the second air return port 221 and having a second length c, where the length of c' is equal to the second length c of the second rib 312. That is, L≧2V / y(a+c) or L≧2abc / y(a+c).

[0117] In this way, the first evaporator 31 includes the second rib 312 that is close to the second air return port 221 and has the second length c, i.e., the other side of the airflow surface of the first evaporator 31. By setting the length of c' equal to the second length c of the second rib 312, it is possible to increase the contact area between the airflow surface of the first evaporator 31 and the air return chamber, thereby increasing the heat exchange efficiency of the evaporator.

[0118] In some embodiments, the freezer includes a liner 1, a wind return cover plate 2, an evaporator, and a compressor 4. The liner 1 surrounds and defines an internal space, defining an air duct having an air outlet 15. The wind return cover plate 2 is located within the internal space and divides the internal space into a storage compartment and an evaporator compartment in which an evaporator is provided. The outlet of the evaporator compartment communicates with the inlet of the air duct, and the wind return cover plate 2 is provided with a wind return opening, allowing airflow within the storage compartment to flow into the evaporator compartment through the wind return opening. The compressor 4 is provided below the evaporator. Here, the wind return cover plate 2 includes a side cover plate portion, and a horizontal insulating gap m is provided between the evaporator and the side cover plate portion.

[0119] As shown in Figure 6, the freezer comprises a liner 1, an air return cover plate 2, an evaporator, and a compressor 4. Here, the air return cover plate 2 includes a side cover plate portion, and a horizontal insulating gap m is provided between the evaporator and the side cover plate portion to insulate the evaporator, thereby preventing loss of the evaporator's cooling capacity and ensuring the heat exchange effect between the airflow inside the freezer and the evaporator, thereby improving the refrigeration effect of the freezer.

[0120] Optionally, the horizontal insulating spacing m is 2 mm or more, and / or the horizontal insulating spacing m is 50 mm or less.

[0121] By setting the horizontal insulation gap m to 2 mm or more, the temperature insulation requirement within the evaporator compartment can be met, thereby ensuring the refrigeration effect of the freezer. Furthermore, by setting the horizontal insulation gap m to 50 mm or less, more space can be saved while the horizontal insulation gap m meets the temperature insulation requirement within the evaporator compartment. At the same time, more filler material can be saved. If the horizontal insulation gap m is set to less than 2 mm, the temperature insulation effect within the evaporator compartment will be poor. On the other hand, if the horizontal insulation gap m is set to more than 50 mm, more space will be occupied and more filler material will be wasted.

[0122] Optionally, the air return cover plate 2 includes a first cover plate portion 21 arranged along the horizontal direction, where a vertical insulation gap n is provided between the evaporator and the first cover plate portion 21.

[0123] By providing a vertical insulation gap n between the evaporator and the first cover plate portion 21, the evaporator is insulated, preventing loss of the evaporator's cooling capacity and ensuring the heat exchange effect between the airflow inside the freezer and the evaporator, thereby improving the freezing effect of the freezer.

[0124] Optionally, the vertical adiabatic spacing n is 2 mm or more, and / or the vertical adiabatic spacing n is 50 mm or less.

[0125] By setting the vertical insulation gap n to 2 mm or more, the temperature insulation requirements within the evaporator compartment can be met, thereby ensuring the refrigeration effect of the freezer. Furthermore, by setting the vertical insulation gap n to 50 mm or less, more space can be saved while the vertical insulation gap n meets the temperature insulation requirements within the evaporator compartment. At the same time, more filler material can be saved. If the vertical insulation gap n is set to less than 2 mm, the temperature insulation effect within the evaporator compartment will be poor. On the other hand, if the vertical insulation gap n is set to more than 50 mm, more space will be occupied and more filler material will be wasted.

[0126] Optionally, horizontal insulation interval m is filled with insulation material, and / or vertical insulation interval n is filled with insulation material.

[0127] A heat insulating material such as foam is filled at a horizontal insulation interval m or a vertical insulation interval n. Because the temperature inside the evaporator compartment is low, such a foam with a certain thickness can effectively suppress heat exchange between the evaporator compartment and the air inside the freezer outside the evaporator compartment wall, thereby maintaining the temperature inside the evaporator compartment and ultimately ensuring the heat exchange effect between the airflow inside the freezer and the evaporator. At the same time, the foam with a certain thickness can also serve to support the side cover plate or first cover plate 21. Furthermore, heat insulating material can be filled at both the horizontal insulation interval m and the vertical insulation interval n, thereby improving the heat retention effect of the heat insulating material inside the evaporator compartment.

[0128] Optionally, the volute depth g of the fan 5 is equal to or greater than 50 mm, and / or the volute depth g of the fan 5 is equal to or less than 150 mm.

[0129] As shown in Figure 4, by setting the volute casing depth g of the fan 5 to 50 mm or more, the operation of the fan 5 is not interfered with and effective air circulation within the freezer is ensured. Furthermore, by setting the volute casing depth g of the fan 5 to 150 mm or less, more space can be saved while ensuring that the operation of the fan 5 is not interfered with. Setting the volute casing depth g of the fan 5 to less than 50 mm may affect the normal operation of the fan 5. On the other hand, setting the volute casing depth g of the fan 5 to more than 150 mm will occupy more space.

[0130] Optionally, the distance h between the outside of the volute casing of the fan 5 and the evaporator is 10 mm or more, and / or the distance h between the outside of the volute casing of the fan 5 and the evaporator is 200 mm or less.

[0131] As shown in Figure 6, by setting the distance h between the outside of the volute casing of the fan 5 and the evaporator to 10 mm or more, a sufficient distance is ensured for the returned airflow to be re-rectified and enter the volute casing duct of the fan 5 after heat exchange with the evaporator, ensuring effective circulation. Furthermore, by setting the distance h between the outside of the volute casing of the fan 5 and the evaporator to 200 mm or less, a sufficient distance is ensured for the returned airflow to be re-rectified and enter the volute casing duct of the fan 5 after heat exchange with the evaporator, ensuring effective circulation, and saving space in the evaporator chamber. Setting the distance h between the outside of the volute casing of the fan 5 and the evaporator to less than 10 mm will affect the efficiency of the returned airflow re-entering the volute casing duct of the fan 5 after heat exchange with the evaporator, which will ultimately affect the effective circulation of airflow in the freezer. On the other hand, if the distance h between the outside of the volute casing of the fan 5 and the evaporator is set to be greater than 200 mm, the space in the evaporator chamber will be wasted.

[0132] Optionally, the freezer further includes a compressor chamber step 14. The compressor chamber step 14 protrudes upward from the bottom wall 13 of the liner 1 and is provided below the air return cover plate 2, and together with the bottom wall 13 of the liner 1, the compressor chamber step 14 surrounds and forms a compressor chamber in which the compressor 4 is disposed.

[0133] In this way, since the freezer needs to accommodate components such as the compressor 4 and condenser, the compressor chamber step 14 protruding upward from the bottom wall 13 of the liner 1, together with the bottom wall 13 of the liner 1, surrounds and forms a compressor chamber in which the compressor 4 can be installed. By providing the compressor chamber step 14 below the air return cover plate 2, it can be seen that the air return cover plate 2, the compressor chamber step 14, and the inner wall of the liner 1 can surround and form an evaporator chamber in which an evaporator is to be installed. Such an evaporator is located above the compressor chamber step 14, so that the evaporator does not occupy excessive internal space of the liner 1, ensuring the storage volume of the storage chamber and making the evaporator chamber more compact, reducing the feeling of heaviness inside the freezer.

[0134] In some embodiments, a freezer includes a liner 1, a wind return cover plate 2, and an evaporator group 3. The liner 1 surrounds and defines an interior space, defining an air duct having an air outlet 15. The wind return cover plate 2 is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment. The outlet of the evaporator compartment is connected to the inlet of the air duct, and the wind return cover plate 2 is provided with a wind return port, allowing airflow within the storage compartment to flow into the evaporator compartment through the wind return port. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator compartment, and a connecting pipe 33 connecting the first evaporator 31 and the second evaporator 32. A foam layer is provided inside the evaporator compartment, and at least a portion of the connecting pipe 33 is provided within the foam layer.

[0135] The freezer includes a liner 1, a wind return cover plate 2, and an evaporator group 3. The liner 1 defines an air duct with an air outlet 15 that can supply cool air to the interior space enclosed by the liner 1 to lower the temperature of the interior space. The wind return cover plate 2 is provided with a wind return port. During operation of the freezer, airflow in the evaporator chamber passes through the evaporator to reduce its temperature, then flows into the air duct by the drive of a fan 5, then flows through the air outlet 15 into the storage chamber, cooling items in the storage chamber, and then returns to the evaporator chamber through the wind return port. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator chamber and a connecting pipe 33 connecting the first evaporator 31 and the second evaporator 32. By providing two connected evaporators, the freezer's refrigeration efficiency can be improved. By providing at least a part of the communication pipe 33 in the foam layer in the evaporator chamber, it is possible to avoid the influence on the heat exchange efficiency of the evaporator that is connected to the communication pipe 33 when frost forms on the entire communication pipe 33, thereby improving the refrigeration effect of the freezer.

[0136] Optionally, the foam layer includes at least a bottom foam layer provided at the bottom of the evaporator group 3. At least a portion of the communication pipe 33 is provided in the bottom foam layer.

[0137] In this way, by providing at least a portion of the connecting pipe 33 in the bottom foam layer at the bottom of the evaporator group 3, it is possible to prevent frost from forming on all of the connecting pipes 33, which would affect the heat exchange efficiency of the connected evaporators. At the same time, it is possible to reduce the uncertainty of the connecting pipe 33 being pulled by hanging in the air, and to avoid damage to the connecting pipe 33.

[0138] Optionally, the first evaporator 31 and the second evaporator 32 are connected in series or in parallel.

[0139] In this way, when the first evaporator 31 and the second evaporator 32 are installed in series and communicated with each other, the temperatures of the first evaporator 31 and the second evaporator 32 can be uniformly adjusted and controlled so that the temperatures of the airflows flowing out of the air ducts of the first evaporator 31 and the second evaporator 32 are close or identical. When the first evaporator 31 and the second evaporator 32 are installed in parallel and communicated with each other, each evaporator can be adjusted and controlled independently, and thus the airflow temperatures of the air ducts of the first evaporator 31 and the second evaporator 32 can be controlled independently, thereby avoiding mutual interference between the two evaporators.

[0140] Optionally, the liner 1 includes a first side wall 11, which defines a first air duct 111 having a first air outlet 15, a first fan 5 provided within the first air duct 111, and a first inlet and a first outlet of the first evaporator 31 provided on a side adjacent to the first fan 5. And / or the liner 1 includes a second side wall 12, which defines a second air duct 112 having a second air outlet 15, a second fan 5 provided within the second air duct 112, and a second inlet and a second outlet of the second evaporator 32 provided on a side adjacent to the second fan 5.

[0141] In this way, the liner 1 includes a first side wall 11, which has an air outlet 15 and defines a first air duct 111 having a first fan 5 therein, and by providing a first inlet and a first outlet of the first evaporator 31 on the side adjacent to the first fan 5, the airflow in the freezer can be circulated from the first side wall 11 through the air return port of the air return cover plate 2 to the first evaporator 31. The second side wall 12 of the liner 1 has an air outlet 15 and defines a second air duct 112 having a second fan 5 therein, and by providing a second inlet and a second outlet of the second evaporator 32 on the side adjacent to the second fan 5, the airflow in the freezer can be circulated from the second side wall 12 through the air return port of the air return cover plate 2 to the second evaporator 32. In this way, the airflow in the freezer flows out from the first side wall 11 and the second side wall 12 and returns through the air return port of the air return cover plate 2, shortening the flow distance of the outflowing airflow and reducing the obstruction of the airflow by other components during its flow, thereby enhancing the air-cooled refrigeration effect of the freezer.

[0142] Optionally, 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 provided below the second inlet and the second outlet of the second evaporator 32.

[0143] In this way, the communicating pipe 33 is provided below the first inlet and first outlet of the first evaporator 31, or the communicating pipe 33 is provided below the second inlet and second outlet of the second evaporator 32, which helps the refrigerant to circulate between the first evaporator 31 and the second evaporator 32. At the same time, the communicating pipe 33 can be provided close to the bottom of the evaporator chamber, which reduces bending of the communicating pipe 33, shortens the length of the communicating pipe 33, and makes the connecting pipe 33 easier to install.

[0144] Optionally, the first evaporator 31 includes a first group of heat exchange tubes 314 and a first group of heated tubes 315 at least partially disposed below the first group of heat exchange tubes 314. And / or the second evaporator 32 includes a second group of heat exchange tubes 321 and a second group of heated tubes 322 at least partially disposed below the second group of heat exchange tubes 321.

[0145] In this way, by locating at least a portion of the first heated tube group 315 of the first evaporator 31 below the first heat exchange tube group 314, the first evaporator 31 can be heated for defrosting. Alternatively, by locating at least a portion of the second heated tube group 322 of the second evaporator 32 below the second heat exchange tube group 321, the second evaporator 32 can be heated for defrosting. Furthermore, by locating at least a portion of the first heated tube group 315 of the first evaporator 31 and at least a portion of the second heated tube group 322 of the second evaporator 32 below the first heat exchange tube group 314 and the second heat exchange tube group 321, respectively, the first evaporator 31 and the second evaporator 32 can be heated for defrosting, respectively, without affecting the heat exchange efficiency of the first evaporator 31 and the second evaporator 32.

[0146] In some embodiments, the freezer includes a liner 1, a wind return cover plate 2, and an evaporator group 3. The liner 1 surrounds and defines an interior space, and the liner 1 defines an air duct having an air outlet 15. The wind return cover plate 2 is located within the interior space and divides the interior space into a storage compartment and an evaporator compartment, an outlet of the evaporator compartment communicates with an inlet of the air duct, and the wind return cover plate 2 is provided with a wind return port, so that airflow within the storage compartment can flow into the evaporator compartment through the wind return port. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator compartment, and a connecting pipe 33 connecting the first evaporator 31 and the second evaporator 32. The evaporator group 3 includes a heat transfer fin group and a heat exchange tube group passing through the heat transfer fin group, and the distance between at least a portion of the communication tube 33 and the heat transfer fin group is equal to or less than the heat transfer distance.

[0147] As shown in FIG. 8, the freezer includes a liner 1, a wind return cover plate 2, and an evaporator group 3. The liner 1 defines an air duct with an air outlet 15 that can supply cool air to the interior space enclosed by the liner 1 to lower the temperature of the interior space. The wind return cover plate 2 is provided with a wind return port. During operation of the freezer, airflow in the evaporator chamber passes through the evaporator to reduce its temperature, then flows into the air duct by the drive of the fan 5, then flows through the air outlet 15 into the storage chamber, cooling items in the storage chamber, and then returns to the evaporator chamber through the wind return port. The evaporator group 3 includes a first evaporator 31 and a second evaporator 32 provided in the evaporator chamber and a connecting pipe 33 connecting the first evaporator 31 and the second evaporator 32. By providing two connected evaporators, the freezer's refrigeration efficiency can be improved. By making the distance between at least a part of the communicating pipe 33 and the heat transfer fin group equal to or less than the heat transfer distance, it is possible to prevent frost from forming on the entire communicating pipe 33 and to defrost the communicating pipe 33 as quickly as possible after frost has formed, thereby ensuring the heat exchange efficiency of the evaporator and improving the refrigeration effect of the freezer.

[0148] Optionally, the heat transfer distance is 10 mm or less.

[0149] In this way, by setting the heat transfer distance to 10 mm or less, it is possible to avoid frost formation on the connecting pipe 33 and accelerate defrosting, thereby ensuring the heat exchange efficiency of the evaporator. Setting the heat transfer distance to be greater than 10 mm affects heat transfer to the connecting pipe by the heat transfer fins, which in turn affects the defrosting efficiency after frost has formed on the connecting pipe 33.

[0150] Optionally, the evaporator chamber includes a wind return chamber located between the first evaporator 31 and the second evaporator 32. At least a portion of the communication pipe 33 is provided in the wind return chamber.

[0151] In this way, a wind return chamber is provided between the first evaporator 31 and the second evaporator 32, whereby the airflow inside the freezer flows into the wind return chamber through the wind return port and then flows into the first evaporator 31 and the second evaporator 32 on both sides, preventing the airflows flowing into the two evaporators from interfering with each other. If at least a part of the communicating pipe 33 is provided inside the wind return chamber, the airflow flowing in from the wind return port passes through the communicating pipe 33, which allows it to be closer to the heating defrosting device in the freezer and allows the communicating pipe 33 to be defrosted more effectively.

[0152] Optionally, the first evaporator 31 includes a first heat transfer fin group 316, and the connecting pipe 33 includes a first bent pipe segment 331, the distance between which is the first heat transfer fin group 316 is equal to or less than the heat transfer distance. And / or, the second evaporator 32 includes a second heat transfer fin group 323, and the connecting pipe 33 includes a second bent pipe segment 332, the distance between which is the second heat transfer fin group 323 is equal to or less than the heat transfer distance.

[0153] In this way, setting the distance between the first bent pipe segment 331 of the connecting pipe and the first heat transfer fin to be equal to or less than the heat transfer distance ensures that the first heat transfer fin can effectively transfer heat to the first bent pipe segment 331 of the connecting pipe, thereby preventing frost from forming on the entire connecting pipe 33 and enabling frost to be defrosted as quickly as possible after frost has formed on the connecting pipe 33. At the same time, setting the distance between the second bent pipe segment 332 of the connecting pipe and the second heat transfer fin to be equal to or less than the heat transfer distance ensures that the second heat transfer fin can effectively transfer heat to the second bent pipe segment 332 of the connecting pipe, thereby preventing frost from forming on the entire connecting pipe 33 and enabling frost to be defrosted as quickly as possible after frost has formed on the connecting pipe 33.

[0154] Optionally, the first inlet and the first outlet of the first evaporator 31 are provided toward the side of the return air chamber, and / or the second inlet and the second outlet of the second evaporator 32 are provided toward the side of the return air chamber.

[0155] In this way, the first inlet and first outlet of the first evaporator 31 are provided facing the air return chamber, which helps the refrigerant in the first evaporator 31 to flow to the second evaporator 32. The second inlet and second outlet of the second evaporator 32 are provided facing the air return chamber, which helps the refrigerant in the second evaporator 32 to flow to the first evaporator 31. At the same time, when the first inlet and first outlet of the first evaporator 31 and the second inlet and second outlet of the second evaporator 32 are all provided facing the air return chamber, this helps the refrigerant to flow between the first evaporator 31 and the second evaporator 32, thereby improving the freezing effect of the freezer compartment.

[0156] Optionally, the freezer further comprises a compressor 4. The compressor 4 is provided below the evaporator group 3.

[0157] Optionally, the freezer further includes a compressor chamber step 14. The compressor chamber step 14 protrudes upward from the bottom wall 13 of the liner 1 and is provided below the air return cover plate 2, and the compressor chamber step 14, together with the bottom wall 13 of the liner 1, surrounds and forms a compressor chamber in which the compressor 4 is disposed.

[0158] In this way, since the freezer needs to accommodate components such as the compressor 4 and condenser, a compressor chamber step 14 protruding upward from the bottom wall 13 of the liner 1 surrounds and forms, together with the bottom wall 13 of the liner 1, a compressor chamber in which the compressor 4 can be installed. By providing the compressor chamber step 14 below the air return cover plate 2, it can be seen that the air return cover plate 2, the compressor chamber step 14, and the inner wall of the liner 1 can surround and form an evaporator chamber in which the evaporator is installed. In this way, the evaporator is located above the compressor chamber step 14, so that the evaporator does not occupy excessive internal space of the liner 1, ensuring the storage volume of the storage chamber and making the evaporator chamber more compact, thereby increasing the actual usable space of the freezer.

[0159] In some embodiments, the fan 5 includes a volute casing and volute tongue assembly 52 and a wind turbine 51 disposed within the volute casing and volute tongue assembly 52. ​​Here, the volute casing and volute tongue assembly 52 includes a first volute casing 521 and a first volute tongue 522, and a second volute casing 523 and a second volute tongue 524. The first volute casing 521 and the first volute tongue 522 surround and form a first fan outlet 53. The second volute casing 523 and the second volute tongue 524 surround and form a second fan outlet 54. Here, the center 511 of the wind turbine and the first spiral tongue 522 form a first auxiliary connecting line, and the center 511 of the wind turbine and the second spiral tongue 524 form a second auxiliary connecting line, and the angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 90° and less than 180°.

[0160] 11, the fan 5 includes a volute casing and volute tongue assembly 52 and a wind turbine 51 installed in the volute casing and volute tongue assembly 52. ​​Within the volute casing and volute tongue assembly 52, a first volute casing 521 and a first volute tongue 522 surround a first fan outlet 53, and a second volute casing 523 and a second volute tongue 524 surround a second fan outlet 54. Here, the center 511 of the wind turbine forms a first auxiliary connection line l1 and a second auxiliary connection line l2 with the first volute tongue 522 and the second volute tongue 524, respectively. By setting the angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 to be greater than 90° and less than 180°, the amount of air blown by the fan 5 to different ducts can be precisely controlled, and thus the amount of air blown to the interior space can be precisely controlled, thereby improving the temperature uniformity of the freezer, enhancing the air-cooling effect of the freezer, and reducing energy consumption.

[0161] In some embodiments, the first volute tongue 522 in the volute casing and volute tongue assembly 52 in the fan 5 has an arc shape, as shown in Fig. 12. Here, the wind turbine center 511 forms a first auxiliary connection line l1 with the first volute tongue 522 and a second auxiliary connection line l2 with the second volute tongue 524, respectively. In this case, the first auxiliary connection line l1 is a connection line between the wind turbine center 511 and the arc end of the first volute tongue 522 that is close to the first fan outlet 53.

[0162] Specifically, the angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 can be 95°, 100°, 110°, 120°, 130°, 140°, 150°, 160°, 170°, or 175°, and can be selected and set according to the ratio of different air flow speeds for the first air duct 111 and the second air duct 112.

[0163] In some embodiments, the freezer includes an internal duct 1 and a fan 5. The liner 1 surrounds and forms an internal space, and includes a first side wall 11, in which a first air duct 111 and a second air duct 112 are provided. The fan 5 includes a first fan outlet 53 communicating with the first air duct 111 and a second fan outlet 54 communicating with the second air duct 112. The fan 5 is the fan 5 described above.

[0164] A freezer provided according to an embodiment of the present disclosure includes a liner 1 and a fan 5. The liner 1 surrounds and forms an interior space, and a first side wall 11 of the liner 1 is provided with a first air duct 111 and a second air duct 112, which can supply cool air to the interior space surrounded by the liner 1 to lower the temperature of the interior space. The fan 5 includes a volute casing and volute tongue assembly 52 and a pinwheel 51 provided within the volute casing and volute tongue assembly 52. ​​A first volute casing 521 and a first volute tongue 522 of the volute casing and volute tongue assembly 52 surround and form a first fan outlet 53, and a second volute casing 523 and a second volute tongue 524 surround and form a second fan outlet 54. The first and second air ducts 111 and 112 on the first side wall 11 of the liner 1 are connected to the first and second air outlets 53 and 54 of the fan 5, respectively. When the fan 5 is driven, refrigerated air flows through the first and second air ducts 111 and 112 into the interior space enclosed by the liner 1, thereby lowering the temperature of the interior space. The center 511 of the fan 5 and the first spiral tongue 522 form a first auxiliary connecting line l1, and the center 511 of the fan 5 and the second spiral tongue 524 form a second auxiliary connecting line l2. By setting the angle between the first and second auxiliary connecting lines to be greater than 90° and less than 180°, the amount of air blown by the fan 5 to the different ducts can be precisely controlled, thereby achieving precise control of the amount of air blown into the interior space. This improves the temperature uniformity of the freezer, enhances the air-cooling effect of the freezer, and reduces energy consumption.

[0165] Optionally, the first blower duct 111 is provided at an upper part of the first side wall 11, and the second blower duct 112 is provided at a lower part of the first side wall 11. Here, the angle between the second auxiliary connecting line l2 formed by the center 511 of the wind turbine and the second spiral tongue 524 and the perpendicular line l3 is between 20° and 60°. Optionally, the angle between the second auxiliary connecting line l2 formed by the center 511 of the wind turbine and the second spiral tongue 524 and the perpendicular line l3 is between 20° and 40°.

[0166] In this way, the installation position of the second spiral tongue can be determined according to the angle between the second auxiliary connecting line l2 and the perpendicular line l3, and the installation position of the first spiral tongue can be determined based on the angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2, that is, the fan 5 can accurately blow air to the first air duct 111 and the second air duct 112.

[0167] Optionally, the 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°. Optionally, the 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°. Optionally, the angle between the first auxiliary connection line l1 and the second auxiliary connection line l3 is greater than 170° and less than 180°.

[0168] As shown in Figures 10 and 11, a first air duct 111 and a second air duct 112 are provided at the top and bottom of the first side wall 11 of the liner 1, respectively. The first air duct 111 is provided with a first duct outlet 1113, and the second duct 112 is provided with a second duct outlet 1123. During air circulation during operation of the freezer, the fan 5 uses the first air duct 111 and the second air duct 112 to transport cool air through the first duct outlet and the second duct outlet into the interior space surrounded by the liner 1. When the air pressure is constant, there is natural settling of the cool air, so the proportional relationship between the airflow rates of the first air duct 111 and the second air duct 112 is one of the main factors affecting the temperature uniformity within the liner. In the embodiment of the present disclosure, the center 511 of the wind turbine forms the first auxiliary connecting line l1 and the second auxiliary connecting line l2 with the first spiral tongue 522 and the second spiral tongue 524, respectively, and the angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 is set to be greater than 90° and less than 180°, so that the fan 5 can precisely control the airflow to the first air duct 111 and the second air duct 112 through the first fan outlet 53 and the second fan outlet 54, respectively, and thus precisely control the airflow to the internal space, thereby improving the temperature uniformity in the liner, enhancing the air-cooling effect of the liner, and reducing energy consumption.

[0169] In an embodiment of the present disclosure, the angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 is greater than 130° and less than or equal to 140°, and the angle between the second auxiliary connecting line l2 formed by the center 511 of the wind turbine and the second spiral tongue 524 and the perpendicular line l3 is greater than or equal to 20° and less than or equal to 40°.

[0170] Next, let's take the freezer compartment volume as an example: 200L, with natural settling of the cool air, the angle between the first auxiliary connecting line l1 and the second auxiliary connecting line l2 as 135°, and the angle between the second auxiliary connecting line formed by the pinwheel center 511 and the second spiral tongue 524 and the perpendicular line l3 as 32°. By combining the first duct outlet 1113 in the first air duct 111 and the second duct outlet 1123 in the second air duct 112, the temperature difference within the freezer can be reduced, the temperature uniformity can be improved, the cooling effect can be enhanced, and energy consumption can be reduced. See Tables 2 and 3 for details.

[0171] JPEG2026504528000003.jpg42170

[0172] JPEG2026504528000004.jpg32170

[0173] As can be seen from Table 2 above, when the angle between the first auxiliary connecting line and the second auxiliary connecting line is 135° and the angle between the second auxiliary connecting line formed by the wind turbine center 511 and the second spiral tongue 524 and the perpendicular line is 32°, detection was performed twice under the same conditions, and the detection results are shown in Example 1 and Example 2. In Example 1, the wind speed ratios of the first blower duct 111 and the second blower duct 112 are 64.00% and 36.00%, respectively, and the final blower air volume is 1047.56 L / min. In Example 2, the wind speed ratios of the first blower duct 111 and the second blower duct 112 are 63.76% and 36.24%, respectively, and the final blower air volume is 1040.57 L / min. As can be seen from the results of Examples 1 and 2, the airflow speeds of the fans for the first airflow duct 111 and the second airflow duct 112 are different, taking into account the natural settling of cool air. Furthermore, referring to Table 3, it can be seen that the minimum temperature in the interior space of the freezer liner 1 in Example 1 is −20.6°C at the center of the bottom wall 13 of the liner 1, and the maximum temperature is −19.3°C at the front left of the top of the liner 1. Thus, the temperature difference between the maximum and minimum temperatures in the interior space of the freezer liner 1 is 1.3°C, and this data indicates that the temperature difference between different positions in the interior space of the freezer liner 1 is small. That is, in the examples of the present disclosure, by varying the airflow speeds for the first airflow duct 111 and the second airflow duct 112, the temperature difference between different positions in the liner can be reduced, improving the temperature uniformity of the liner.

[0174] It can be seen that if the angle between the first auxiliary connecting line and the second auxiliary connecting line is set to be greater than 90° and less than 180°, and the angle between the second auxiliary connecting line formed by the center 511 of the wind turbine and the vertical line is set to a value other than 20° or more and 60° or less, the freezer can also obtain test results equivalent to those of Example 1 in terms of air flow rate and temperature difference, and ultimately can obtain similar effects.

[0175] Optionally, the first blower duct 111 includes a first expanded pressure section duct 1111 directly communicating with the first fan outlet 53, and a first constant pressure section duct 1112 communicating with the first expanded pressure section duct 1111. The second blower duct 112 includes a second expanded pressure section duct 1121 directly communicating with the second fan outlet 54, and a second constant pressure section duct 1122 communicating with the second expanded pressure section duct 1121. Here, the total area of ​​the blower openings 15 of the first constant pressure section duct 1112 is larger than the area of ​​the blower openings 15 of the second constant pressure section duct 1122.

[0176] By providing the first air supply duct 111 with a first pressure expansion section duct 1111 that directly communicates with the first fan outlet 53 and a first constant pressure section duct 1112 that communicates with the first pressure expansion section duct 1111, it is possible to further stabilize the airflow of cool air entering the interior space from the first air supply duct 111. By providing the second air supply duct 112 with a second pressure expansion section duct 1121 that directly communicates with the second fan outlet 54 and a second constant pressure section duct 1122 that communicates with the second pressure expansion section duct 1121, it is possible to further stabilize the airflow of cool air entering the interior space from the second air supply duct 112. Furthermore, since the total amount of cool air allocated to the first air supply duct 111 is large, by setting the total area of ​​the air outlet 15 of the first constant pressure section duct 1112 larger than the area of ​​the air outlet 15 of the second constant pressure section duct 1122, the cool air can enter the interior space more effectively through the air outlet 15 of the first air supply duct 111.

[0177] Optionally, the first air duct 111 includes a first end outlet 15 remote from the fan 5, the second air duct 112 includes a second end outlet 15 remote from the fan 5, and the liner 1 includes end sidewalls proximate to the first end outlet 15 and the second end outlet 15, wherein a horizontal distance between the first end outlet 15 and the end sidewall is a first end spacing, and a horizontal distance between the second end outlet 15 and the end sidewall is a second end spacing, and the first end spacing is smaller than the second end spacing.

[0178] By making the first end spacing smaller than the second end spacing, i.e., by making the horizontal distance between the first end air outlet 15 and the end side wall smaller than the horizontal distance between the second end air outlet 15 and the end side wall, the distribution of the air flow from the second air outlet 15 of the second air duct 112 can be made more uniform, and the temperature difference at different positions in the internal space surrounded by the liner 1 can be reduced, thereby better improving the temperature uniformity of the freezer.

[0179] Optionally, the difference between the first end spacing and the second end spacing is equal to or greater than the length of one air outlet 15 of the first air duct 111. Alternatively, the difference between the first end spacing and the second end spacing is equal to or greater than the length of one air outlet 15 of the second air duct 112.

[0180] In this way, the difference between the first end spacing and the second end spacing is set to be equal to or greater than the length of one air outlet 15 of the first air duct 111. Alternatively, by setting the difference between the first end spacing and the second end spacing to be equal to or greater than the length of one air outlet 15 of the second air duct 112, the length of one air outlet 15 of the first air duct 111 or the length of one air outlet 15 of the second air duct 112 can be made shorter than that of the first air duct 111, thereby making it possible to more uniformly distribute the air volume of the second air outlet 15 of the second air duct 112, thereby reducing the temperature difference at different positions in the internal space surrounded by the liner 1 and further improving the temperature uniformity of the liner.

[0181] The above description and accompanying drawings sufficiently illustrate embodiments of the present disclosure to enable one skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless explicitly required, distinct parts and functions are optional, and the order of operations may be changed. Portions and features of some embodiments may be included in, or substituted for, portions and features of other embodiments. The embodiments of the present disclosure are not limited to the configurations already described above and illustrated in the accompanying drawings, and various modifications and variations are possible without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims. [Explanation of symbols]

[0182] 1 liner 11 First side wall 111 First ventilation duct 1111 First expansion duct 1112 First constant pressure duct 1113 First duct outlet 112 Second ventilation duct 1121 Second expansion duct 1122 Second constant pressure duct 1123 Second duct outlet 12 Second side wall 13 Bottom wall 14 Compressor room step 15 Air vent 2 Wind return cover plate 21 1st cover plate part 211 First Wind Return Port 2111 First wind return section 2112 Wind return guide plate 22 2nd cover plate part 221 Second Wind Return Port 3 Evaporator Group 31 First evaporator 311 First Rib 312 Second Rib 313 Third Rib 314 No. 1 Heat Exchange Tube Group 315 No. 1 Heating Tube Group 316 First heat transfer fin group 32 Second evaporator 321 Second heat exchange tube group 322 No. 2 Heating Tube Group 323 Second heat transfer fin group 33 Communication pipe 331 First bent pipe segment 332 Second bent pipe segment 4. Compressor 5 Fans 51 Windmill 511 Windmill center 52 Volute casing, volute tongue, assembly 521 First spiral casing 522 First spiral tongue 523 Second spiral casing 524 Second spiral tongue 53 First fan outlet 54 Second fan outlet 6. Housing 7 Door body a Length of the first rib c Length of the second rib L Distance between the first and second evaporators m Horizontal insulation spacing n Vertical insulation interval g Fan volute casing depth h Distance between the outside of the fan volute casing and the evaporator S1 Area of ​​the first wind return port S2 Area of ​​the second wind return port S Total area of ​​all wind return openings V is the total volume of all evaporator groups l1 1st auxiliary connection line l2 1st auxiliary connection line l3 perpendicular line d1 First end distance d2 Second end distance

Claims

1. A freezer, a liner that surrounds and forms an interior space and defines an air duct having an air outlet; a wind return cover plate located within the internal space and dividing the internal space into a storage chamber and an evaporator chamber, the outlet of the evaporator chamber being connected to the inlet of the air supply duct, and the wind return cover plate being provided with a wind return port, so that airflow within the storage chamber can flow into the evaporator chamber through the wind return port; an evaporator located in the evaporator chamber; The relationship between the total volume V of the evaporator and the total area S of the air return port is yS = V, where y is 50 or more. freezer.

2. The y is 1000 or less. The freezer of claim 1.

3. y is equal to or greater than 55 and equal to or less than 700; The freezer of claim 2.

4. The air return cover plate is a first cover plate portion provided along a horizontal direction; a second cover plate portion provided along a vertical direction and connected to the first cover plate portion, At least one of the first cover plate portion and the second cover plate portion is provided with a wind return port. The freezer of claim 1.

5. The freezer is a compressor chamber step including a vertical step plate provided along the vertical direction and a horizontal step plate provided along the horizontal direction, the compressor chamber step being provided so as to protrude upward from the bottom wall of the liner, the compressor chamber step surrounding and forming a compressor chamber in which a compressor is disposed together with the bottom wall of the liner; Here, the vertical step plate is connected to the second cover plate portion of the wind return cover plate, and a wind return port communicating with the evaporator chamber is provided at least at a position on the vertical step plate connected to the second cover plate portion, and the total area S of the wind return port is the sum of the areas of all the wind return ports. The freezer of claim 4.

6. The air return cover plate is provided on the upper part of the compressor chamber step. The freezer of claim 5.

7. The evaporator comprises: a first evaporator provided at one end of the evaporator chamber, the first evaporator forming an angle with respect to a horizontal direction that is equal to or smaller than a first angle; a second evaporator provided at the other end of the evaporator chamber, the second evaporator forming an angle with the horizontal direction that is equal to or smaller than the first angle; Here, the total volume V of the evaporator is the sum of the volumes of the first evaporator and the second evaporator. The freezer of claim 4.

8. The evaporator chamber includes a wind return chamber located between a first evaporator and a second evaporator, the first cover plate portion is provided with a first wind return port located at a top of the wind return chamber, and the second cover plate portion is provided with a second wind return port located at a side surface of the wind return chamber, Here, the area of ​​the first wind return port is equal to or greater than the area of ​​the second wind return port. The freezer of claim 7.

9. the first wind return port includes a plurality of first wind return sections arranged in parallel, Here, the width of the first wind return section is equal to or less than a first width threshold, and / or the length of the first wind return section is equal to or greater than a first length threshold. The freezer of claim 8.

10. the liner includes a first sidewall, the first sidewall defining an air duct having the air outlet; Here, a fan is provided in the air duct. A freezer according to any one of claims 1 to 9.

11. A freezer, a liner that surrounds and forms an interior space and defines an air duct having an air outlet; a wind return cover plate located within the internal space and dividing the internal space into a storage chamber and an evaporator chamber, the outlet of the evaporator chamber being connected to the inlet of the air supply duct, and the wind return cover plate being provided with a wind return port, so that airflow within the storage chamber can flow into the evaporator chamber through the wind return port; an evaporator group including a first evaporator and a second evaporator provided in the evaporator chamber, and a communication pipe connecting the first evaporator and the second evaporator, Here, a foam layer is provided inside the evaporator chamber, and at least a portion of the communication pipe is provided within the foam layer. freezer.

12. the foam layer includes at least a bottom foam layer provided at a bottom of the evaporator group; wherein at least a portion of the communicating pipe is provided within the bottom foam layer. The freezer of claim 11.

13. The first evaporator and the second evaporator are connected in series or in parallel. The freezer of claim 11.

14. the liner includes a first sidewall, the first sidewall defining a first sidewall air duct having an air outlet, wherein a first fan is disposed within the first sidewall air duct, and the first inlet and first outlet of the first evaporator are disposed adjacent to the first fan; and / or the liner includes a second sidewall, the second sidewall defining a second sidewall air duct having an air outlet, wherein a second fan is provided within the second sidewall air duct, and a second inlet and a second outlet of the second evaporator are provided on a side adjacent to the second fan. A freezer according to any one of claims 11 to 13.

15. the communicating pipe is provided below a first inlet and a first outlet of the first evaporator; and / or The communication pipe is provided below the second inlet and the second outlet of the second evaporator.

15. The freezer of claim 14.

16. the first evaporator includes a first group of heat exchange tubes and a first group of heating tubes at least partially disposed below the first group of heat exchange tubes; and / or the second evaporator includes a second heat exchange tube group and a second heating tube group, at least a portion of which is provided below the second heat exchange tube group. The freezer of claim 11.

17. The freezer is The compressor chamber step is provided so as to protrude upward from the bottom wall of the liner and is provided below the air return cover plate, and the compressor chamber step, together with the bottom wall of the liner, surrounds and forms a compressor chamber in which a compressor is disposed. The freezer of claim 11.

18. The relationship between the sum V of the volumes of the first evaporator and the second evaporator and the total area S of the air return port is yS=V, where y is 50 or more. The freezer of claim 11.

19. The y is 1000 or less.

19. The freezer of claim 18.

20. y is equal to or greater than 55 and equal to or less than 700; 20. The freezer of claim 19.

21. A freezer, a liner that surrounds and forms an interior space and defines an air duct having an air outlet; a wind return cover plate located within the internal space and dividing the internal space into a storage chamber and an evaporator chamber, the outlet of the evaporator chamber being connected to the inlet of the air supply duct, and the wind return cover plate being provided with a wind return port, so that airflow within the storage chamber can flow into the evaporator chamber through the wind return port; an evaporator group including a first evaporator and a second evaporator provided in the evaporator chamber, and a communication pipe connecting the first evaporator and the second evaporator, wherein the evaporator group includes a heat transfer fin group and a heat exchange tube group penetrating the heat transfer fin group, and the distance between at least a portion of the communicating tube and the heat transfer fin group is equal to or less than a heat transfer distance. freezer.

22. The heat transfer distance is 10 mm or less.

22. The freezer of claim 21.

23. The evaporator chamber includes a return air chamber located between the first evaporator and the second evaporator, Here, at least a portion of the communication pipe is provided in the air return chamber.

22. The freezer of claim 21.

24. the first evaporator includes a first heat transfer fin group, and the connecting pipe includes a first bent pipe segment, the distance between which is equal to or less than the heat transfer distance and the first heat transfer fin group; and / or the second evaporator includes a second heat transfer fin group, and the communication pipe includes a second bent pipe segment, the distance between the second heat transfer fin group being equal to or less than the heat transfer distance; 24. The freezer of claim 23.

25. The first inlet and the first outlet of the first evaporator are provided toward the air return chamber, and / or The second inlet and the second outlet of the second evaporator are provided toward the air return chamber.

25. The freezer of claim 24.

26. The freezer is Further comprising a compressor provided below the evaporator group.

22. The freezer of claim 21.

27. The freezer is The compressor chamber step is provided so as to protrude upward from the bottom wall of the liner and is provided below the air return cover plate, and the compressor chamber step, together with the bottom wall of the liner, surrounds and forms a compressor chamber in which a compressor is disposed.

27. The freezer of claim 26.

28. The relationship between the sum V of the volumes of the first evaporator and the second evaporator and the total area S of the air return port is yS=V, where y is 50 or more.

22. The freezer of claim 21.

29. The y is 1000 or less.

29. The freezer of claim 28.

30. y is equal to or greater than 55 and equal to or less than 700; 30. The freezer of claim 29.

31. Being a fan, a volute casing and volute tongue assembly; and a wind turbine mounted within the volute casing and volute tongue assembly, wherein the volute casing / volute tongue assembly comprises: a first volute casing and a first volute tongue portion that surround and form a first fan outlet; a second volute casing and a second volute tongue that surround and define the second fan outlet, wherein the center of the wind turbine and the first spiral tongue form a first auxiliary connecting line, and the center of the wind turbine and the second spiral tongue form a second auxiliary connecting line, and the angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 90° and less than 180°; fan.

32. The angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 100° and less than or equal to 140°; or The angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 130° and less than or equal to 140°; or the angle between the first auxiliary connecting line and the second auxiliary connecting line is greater than 170° and less than 180°; 32. The fan of claim 31.

33. A freezer, a liner surrounding an interior space, the liner including a first side wall, the first side wall having a first air duct and a second air duct; a fan including a first fan outlet communicating with the first air blower duct and a second fan outlet communicating with the second air blower duct; wherein the fan is a fan according to claim 31 or 32. freezer.

34. the first air duct is provided in an upper portion of the first side wall, and the second air duct is provided in a lower portion of the first side wall, wherein the angle between the second auxiliary connecting line formed by the center of the wind turbine and the second spiral tongue and the vertical line is between 20° and 60°, or the angle between the second auxiliary connecting line formed by the center of the wind turbine and the second spiral tongue and the vertical line is between 20° and 40°.

34. The freezer of claim 33.

35. the first blower duct includes a first pressure expansion section duct directly communicating with the first fan outlet and a first constant pressure section duct communicating with the first pressure expansion section duct, the second blower duct includes a second pressure expansion section duct directly communicating with the second fan outlet and a second constant pressure section duct communicating with the second pressure expansion section duct, Here, a total area of ​​the air outlets of the first constant pressure section duct is larger than an area of ​​the air outlets of the second constant pressure section duct.

35. The freezer of claim 34.

36. the first air duct includes a first end air outlet remote from the fan, the second air duct includes a second end air outlet remote from the fan, the liner includes end sidewalls proximate the first end vent and the second end vent; Here, a horizontal distance between the first end outlet and the end sidewall is a first end spacing, a horizontal distance between the second end outlet and the end sidewall is a second end spacing, and the first end spacing is smaller than the second end spacing.

35. The freezer of claim 34.

37. The difference between the first end spacing and the second end spacing is equal to or greater than the length of one air outlet of the first air duct, or a difference between the first end distance and the second end distance being equal to or greater than the length of one air outlet of the second air duct; 37. The freezer of claim 36.

38. The freezer is a wind return cover plate located within the internal space and separating the internal space into a storage chamber and an evaporator chamber, the outlet of the evaporator chamber being connected to the inlets of the first air supply duct and the second air supply duct, and the wind return cover plate being provided with a wind return port so that airflow within the storage chamber can flow into the evaporator chamber through the wind return port; an evaporator provided in the evaporator chamber; Further comprising a compressor provided in the lower part of the evaporator chamber.

38. A freezer according to any one of claims 33 to 37.

39. The freezer is The compressor chamber step is provided so as to protrude upward from the bottom wall of the liner and is provided below the air return cover plate, and the compressor chamber step, together with the bottom wall of the liner, surrounds and forms a compressor chamber in which a compressor is disposed.

39. The freezer of claim 38.

40. The relationship between the total volume V of the evaporator and the total area S of the air return port is yS=V, where y is 50 or more and 1000 or less.

39. The freezer of claim 38.

41. A freezer, a liner that surrounds and forms an interior space and defines an air duct having an air outlet; a wind return cover plate located within the internal space and dividing the internal space into a storage chamber and an evaporator chamber, the outlet of the evaporator chamber being connected to the inlet of the air supply duct, and the wind return cover plate being provided with a wind return port, so that airflow within the storage chamber can flow into the evaporator chamber through the wind return port; an evaporator group including a first evaporator and a second evaporator provided in the evaporator chamber, the evaporator chamber including a wind return chamber located between the first evaporator and the second evaporator, and a distance L between the first evaporator and the second evaporator satisfies L≧S / (a′+c′); where S is the total area of ​​the wind return port, a' and c' are the lengths of two different positions of the wind return chamber or the first evaporator, respectively, and at least one of the two different positions is adjacent to the wind return port. freezer.

42. The wind return cover plate includes a first cover plate portion provided along a horizontal direction, and the first cover plate portion is provided with a first wind return port located at a top of the wind return chamber, Here, a' is the length of a position in the air return chamber close to the first air return port, and a' is equal to or greater than the length of the first air return port and equal to or less than the total length of the first cover plate portion along the length direction of the first air return port.

42. The freezer of claim 41.

43. the first evaporator includes a first rib adjacent to the first air return port and having a first length a; wherein the length a' is equal to the first length a of the first rib; 43. The freezer of claim 42.

44. The air return cover plate further includes a second cover plate portion provided along a vertical direction, and the second cover plate portion is provided with a second air return port located on a side surface of the air return chamber, Here, c' is the length of a position in the air return chamber close to the second air return port, and c' is equal to or greater than the length of the second air return port and equal to or less than the total length of the second cover plate portion along the length direction of the second air return port.

43. The freezer of claim 42.

45. the first evaporator includes a second rib adjacent to the second air return port and having a second length c; wherein the length of c' is equal to the second length c of the second rib; 45. The freezer of claim 44.

46. the first evaporator is at an angle with respect to the horizontal that is equal to or less than a first angle; and / or the second evaporator has an angle with respect to the horizontal direction that is equal to or smaller than the first angle; 42. The freezer of claim 41.

47. The relationship between the total volume V of the evaporator group and the total area S of the wind return port is yS=V, where y is 50 or more.

42. The freezer of claim 41.

48. The y is 1000 or less.

48. The freezer of claim 47.

49. the liner includes a first sidewall, the first sidewall defining an air duct having the air outlet; Here, a fan is provided in the air duct.

49. A freezer according to any one of claims 41 to 48.

50. A freezer, a liner that surrounds and forms an interior space and defines an air duct having an air outlet; an air return cover plate located within the internal space and dividing the internal space into a storage chamber and an evaporator chamber in which an evaporator is provided, the outlet of the evaporator chamber being connected to the inlet of the air supply duct, and the air return cover plate being provided with an air return port so that airflow within the storage chamber can flow into the evaporator chamber through the air return port; a compressor provided below the evaporator, Here, the air return cover plate includes a side cover plate portion, and a horizontal insulation gap m is provided between the evaporator and the side cover plate portion. freezer.

51. The horizontal insulation spacing m is 2 mm or more, and / or The horizontal insulation interval m is 50 mm or less.

51. The freezer of claim 50.

52. The air return cover plate includes a first cover plate portion provided along a horizontal direction, Here, a vertical insulation gap n is provided between the evaporator and the first cover plate portion.

52. The freezer of claim 51.

53. The vertical adiabatic spacing n is 2 mm or more, and / or The vertical insulation interval n is 50 mm or less.

53. The freezer of claim 52.

54. The horizontal insulation interval m is filled with insulation material, and / or A thermal insulating material is filled at the position of the vertical thermal insulating interval n.

53. The freezer of claim 52.

55. the liner includes a first sidewall, the first sidewall defining an air duct having the air outlet; Here, a fan is provided in the air duct.

55. A freezer according to any one of claims 50 to 54.

56. The depth g of the volute casing of the fan is 50 mm or more, and / or The depth g of the volute casing of the fan is 150 mm or less.

56. The freezer of claim 55.

57. The gap h between the outside of the volute casing of the fan and the evaporator is 10 mm or more; and / or The distance h between the outside of the volute casing of the fan and the evaporator is 200 mm or less.

56. The freezer of claim 55.

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