Stirling refrigerator

Abstract

The present application provides a Stirling refrigerator, comprising an outer shell, an inner liner, a first insulation layer, a refrigerator door, a refrigeration system, a cold-end air duct, and a hot-end air duct. The outer shell is provided with a first opening, the inner liner is disposed within the outer shell, the inner liner is provided with a second opening, the first insulation layer covers the outer shell, the first insulation layer is provided with a third opening, and the refrigerator door is rotatably mounted within the first opening. The refrigeration system includes a Stirling refrigerator, a cold-end fan, and a hot-end fan, the Stirling refrigerator being connected to a cold-end heat exchanger and a hot-end heat exchanger. The cold-end air duct is disposed between the first insulation layer and the inner liner, the cold-end fan and the cold-end heat exchanger being both disposed within the cold-end air duct. The hot-end air duct is disposed between the first insulation layer and the outer shell, the hot-end fan and the hot-end heat exchanger being both disposed within the hot-end air duct. Both the cold-end air duct and the hot-end air duct are filled with dust-free air or nitrogen. The present application is advantageous in reducing the failure rate of the cold-end fan and the hot-end fan, thereby increasing the service life of the refrigerator.

Description

Technical Field

[0001] The present application relates to the technical field of household appliances, and in particular to a Stirling refrigerator. Background Art

[0002] Refrigerators are a common type of refrigeration device used in daily life. They keep food and other items stored inside at a constant low temperature, thereby extending their shelf life. Traditional refrigerators primarily utilize a vapor compression refrigeration cycle using a chlorofluorocarbon (CFC) refrigerant. CFCs do not decompose when released into the atmosphere and can damage the ozone layer. With increasing awareness of environmental protection, refrigerators using Stirling refrigerators have been developed in recent years. Because Stirling refrigerators use helium as a medium, they achieve refrigeration without emitting harmful substances into the atmosphere, thus achieving environmental protection.

[0003] In related art solutions, refrigerators using a Stirling refrigerator primarily consist of an outer shell, an inner container, an insulation layer between the outer shell and the inner container, and a refrigeration system. The refrigeration system includes the Stirling refrigerator, a cold-end fan, and a hot-end fan. The Stirling refrigerator is connected to a cold-end heat exchanger and a hot-end heat exchanger. The cold-end fan and the cold-end heat exchanger are located inside the inner container and directly blow air to cool the air inside, thereby achieving the cooling function. The hot-end fan is used to blow the high-temperature air from the hot-end heat exchanger to the external environment of the refrigerator, thereby achieving heat dissipation.

[0004] However, with the solutions in the related art, the cold-end fan is exposed to the inner container, which is prone to frost and other problems; while the hot-end fan is exposed to the external environment, which is prone to dust accumulation. Both of these situations increase the failure rate of the refrigerator and shorten the service life of the refrigerator. Summary of the Invention

[0005] In order to overcome the above-mentioned defects in the related art, the purpose of the present application is to provide a Stirling refrigerator to reduce the failure rate of the cold end fan and the hot end fan and increase the service life of the refrigerator.

[0006] The present application provides a Stirling refrigerator, comprising:

[0007] a housing, wherein a first opening is provided on a first side surface of the housing along a first direction;

[0008] an inner liner, the inner liner being disposed in the outer shell, and having a second opening on a first side wall of the inner liner along the first direction, wherein the first side wall is the side wall of the inner liner closest to the first side surface;

[0009] a first thermal insulation layer, the first thermal insulation layer being coated on the outer surface of the inner liner, the first thermal insulation layer being provided with a third opening, the first opening, the second opening and the third opening being arranged opposite to each other;

[0010] a refrigerator door, the refrigerator door being rotatably mounted in the first opening and filled with a second insulation layer;

[0011] A refrigeration system, comprising a Stirling refrigerator, a cold-end fan, and a hot-end fan, wherein the Stirling refrigerator is connected to a cold-end heat exchanger and a hot-end heat exchanger;

[0012] a cold-end air duct, for performing heat exchange with the inner liner, the cold-end air duct being arranged between the first thermal insulation layer and the inner liner, the cold-end fan and the cold-end heat exchanger being both arranged in the cold-end air duct, and the cold-end air duct being filled with dust-free air or nitrogen;

[0013] The hot end air duct is used for heat exchange with the shell. The hot end air duct is arranged between the first insulation layer and the shell. The hot end fan and the hot end heat exchanger are both arranged in the hot end air duct. The hot end air duct is filled with dust-free air or nitrogen.

[0014] In the Stirling refrigerator as described above, optionally, the cold end air duct includes a cold end main body and a cold end heat exchange part connected to the cold end main body;

[0015] The cold end main body is arranged outside the top wall or bottom wall of the inner container along the second direction, and the cold end fan and the cold end heat exchanger are both arranged in the cold end main body;

[0016] The cold end heat exchange portion is connected to the cold end main body portion, and the cold end heat exchange portion is attached to at least the outside of the second side wall of the inner liner along the first direction, the outside of the third side wall of the inner liner along the third direction, and / or the outside of the fourth side wall of the inner liner along the third direction;

[0017] The hot end air duct includes a hot end main body and a hot end heat exchange part connected to the hot end main body;

[0018] The hot end main body is arranged on the same side as the cold end main body along the second direction, and the hot end fan and the hot end heat exchanger are both arranged in the hot end main body;

[0019] The hot end heat exchange portion is connected to the hot end main body, and the hot end heat exchange portion is at least attached to the second side surface of the shell along the first direction, the third side surface of the shell along the third direction, and / or the fourth side surface of the shell along the third direction.

[0020] In the Stirling refrigerator as described above, optionally, the cold end main body and the hot end main body are both arranged outside the top wall of the inner container;

[0021] The cold end heat exchange portion is arranged outside the third side wall of the inner liner along the third direction, outside the fourth side wall of the inner liner along the third direction, and outside the bottom wall of the inner liner;

[0022] The hot end heat exchange portion is disposed within a third side surface of the shell along the third direction, within a fourth side surface of the shell along the third direction, and within a bottom surface of the shell.

[0023] In the Stirling refrigerator as described above, optionally, the cold end main body and the hot end main body are both arranged outside the bottom wall of the inner container;

[0024] The cold end heat exchange portion is arranged outside the third side wall of the inner liner along the third direction, outside the fourth side wall of the inner liner along the third direction, and outside the top wall of the inner liner;

[0025] The hot end heat exchange portion is disposed within a third side surface of the shell along the third direction, within a fourth side surface of the shell along the third direction, and within a top surface of the shell.

[0026] In the Stirling refrigerator as described above, optionally, the cold end main body and the hot end main body are both arranged outside the top wall of the inner container;

[0027] The cold end heat exchange portion is arranged outside the second side wall of the inner tank along the first direction, and the cold end heat exchange portion is provided with a first interface and a second interface connected to the cold end main body, and the first interface and the second interface are respectively located at two ends of the cold end heat exchange portion in the third direction; a cold end partition is further provided in the cold end heat exchange portion, and the cold end partition is arranged along the second direction and located between the first interface and the second interface, and the cold end partition is provided with at least one first notch;

[0028] The hot end heat exchange portion is arranged within the second side surface of the shell along the first direction, and the hot end heat exchange portion is provided with a third interface and a fourth interface connected to the hot end main body, and the third interface and the fourth interface are respectively located at the two ends of the hot end heat exchange portion in the third direction; a hot end partition is also provided in the hot end heat exchange portion, and the hot end partition is arranged along the second direction and located between the third interface and the fourth interface, and at least one second notch is provided on the hot end partition.

[0029] In the Stirling refrigerator as described above, optionally, the cold end main body and the hot end main body are both arranged outside the top wall of the inner container;

[0030] The cold end heat exchange portion is arranged outside the third side wall of the inner liner along the third direction, outside the fourth side wall of the inner liner along the third direction, and outside the bottom wall of the inner liner;

[0031] The hot end heat exchange portion is disposed within a third side surface of the housing along the third direction, within a fourth side surface of the housing along the third direction, and within a second side surface of the housing along the first direction.

[0032] In the Stirling refrigerator as described above, optionally, the cold-end heat exchange portion is a sealed cavity connected to the cold-end main body portion, a cold-end bending plate is provided in the cold-end heat exchange portion, the cold-end bending plate is arranged along the second direction, and two sides of the cold-end bending plate are respectively connected to two opposite inner walls of the cold-end heat exchange portion to divide the cold-end heat exchange portion into a plurality of adjacent cold-end flow channels;

[0033] The hot end heat exchange portion is a sealed cavity connected to the hot end main body portion, and a hot end bending plate is provided in the hot end heat exchange portion. The hot end bending plate is arranged along the second direction, and the two sides of the hot end bending plate are respectively connected to the two opposite inner walls of the hot end heat exchange portion to divide the hot end heat exchange portion into a plurality of hot end flow channels adjacent to each other.

[0034] In the Stirling refrigerator as described above, optionally, in a plane perpendicular to the second direction, the cross-section of the cold end flow channel is triangular, trapezoidal, rectangular or U-shaped; the cross-section of the hot end flow channel is triangular, trapezoidal, rectangular or U-shaped.

[0035] In the Stirling refrigerator as described above, optionally, the cold end heat exchange portion includes a plurality of cold end flow channels arranged in parallel along the second direction, the plurality of cold end flow channels are arranged at equal intervals and are all connected to the cold end main body;

[0036] The hot end heat exchange portion includes a plurality of hot end flow channels arranged in parallel along the second direction. The plurality of hot end flow channels are arranged at equal intervals and are all connected to the hot end main body.

[0037] In the Stirling refrigerator as described above, optionally, in a plane perpendicular to the second direction, the cross-section of the cold end flow channel is triangular, trapezoidal, rectangular or U-shaped; the cross-section of the hot end flow channel is triangular, trapezoidal, rectangular or U-shaped.

[0038] The present application provides a Stirling refrigerator, comprising an outer shell, an inner liner, a first insulation layer, a refrigerator door, a refrigeration system, a cold-end air duct and a hot-end air duct, wherein the outer shell is provided with a first opening on a first side surface along a first direction; the inner liner is arranged in the outer shell, and a second opening is provided on a first side wall of the inner liner along the first direction, wherein the first side wall is the side wall of the inner liner closest to the first side surface; the first insulation layer is coated on the outer surface of the inner liner, and a third opening is provided on the first insulation layer, and the first opening, the second opening and the third opening are arranged opposite to each other; the refrigerator door is rotatably installed in the first opening, and the refrigerator door is filled with the second insulation layer. The second insulation layer; the refrigeration system includes a Stirling refrigerator, a cold-end fan and a hot-end fan, wherein the Stirling refrigerator is connected to a cold-end heat exchanger and a hot-end heat exchanger; the cold-end air duct is used for heat exchange with the inner liner, the cold-end air duct is arranged between the first insulation layer and the inner liner, the cold-end fan and the cold-end heat exchanger are both arranged in the cold-end air duct, and the cold-end air duct is filled with dust-free air or nitrogen; the hot-end air duct is used for heat exchange with the outer shell, the hot-end air duct is arranged between the first insulation layer and the outer shell, the hot-end fan and the hot-end heat exchanger are both arranged in the hot-end air duct, and the hot-end air duct is filled with dust-free air or nitrogen. The present application sets a cold-end air duct between the first insulation layer and the inner liner, and sets a cold-end fan and a cold-end heat exchanger in the cold-end air duct. The cold-end air duct is a sealed cavity filled with dust-free air or nitrogen. The cold-end fan is completely isolated from the space inside the inner liner during operation, so it is not easy to cause problems such as frost. The application sets a hot-end air duct between the first insulation layer and the outer shell, and sets a hot-end fan and a hot-end heat exchanger in the hot-end air duct. The hot-end air duct is a sealed cavity filled with dust-free air or nitrogen. The hot-end fan is completely isolated from the external environment during operation, so it is not easy to accumulate dust. From the above description, it can be seen that the present application is conducive to reducing the failure rate of the cold-end fan and the hot-end fan and improving the service life of the refrigerator. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following is a brief introduction to the drawings required for use in the embodiments or related technical descriptions. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0040] Figure 1 A cross-sectional view of a Stirling refrigerator provided in an embodiment of the present application at a first viewing angle;

[0041] Figure 2 A cross-sectional view of a Stirling refrigerator provided in an embodiment of the present application at a second viewing angle;

[0042] Figure 3 A cross-sectional view of a Stirling refrigerator provided in an embodiment of the present application from a third viewing angle;

[0043] Figure 4 A cross-sectional view of a Stirling refrigerator provided in accordance with another embodiment of the present application.

[0044] Reference numerals:

[0045] 100-housing;

[0046] 200- liner; 210- cavity;

[0047] 300-first insulation layer;

[0048] 400-refrigerator door;

[0049] 500-Stirling refrigerator; 510-cold end heat exchanger; 520-hot end heat exchanger;

[0050] 600-cold end fan;

[0051] 700-hot end fan;

[0052] 800-cold end air duct; 810-cold end main body; 820-cold end heat exchange part;

[0053] 900-hot end air duct; 910-hot end main body; 920-hot end heat exchange part;

[0054] X-first direction; Y-second direction; Z-third direction. DETAILED DESCRIPTION

[0055] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments.

[0056] Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0057] In related art solutions, refrigerators using a Stirling refrigerator primarily consist of an outer shell, an inner container, an insulation layer between the outer shell and the inner container, and a refrigeration system. The refrigeration system includes the Stirling refrigerator, a cold-end fan, and a hot-end fan. The Stirling refrigerator is connected to a cold-end heat exchanger and a hot-end heat exchanger. The cold-end fan and the cold-end heat exchanger are located inside the inner container and directly blow air to cool the air inside, thereby achieving the cooling function. The hot-end fan is used to blow the high-temperature air from the hot-end heat exchanger to the external environment of the refrigerator, thereby achieving heat dissipation.

[0058] However, with the solutions in the related art, the cold-end fan is exposed to the inner container, which is prone to frost and other problems; while the hot-end fan is exposed to the external environment, which is prone to dust accumulation. Both of these situations increase the failure rate of the refrigerator and shorten the service life of the refrigerator.

[0059] In view of this, the present application aims to provide a Stirling refrigerator, by respectively arranging sealed hot-end air duct and cold-end air duct on the outside and inside of the first insulation layer, and filling the hot-end air duct and the cold-end air duct with dust-free air or nitrogen, and arranging the cold-end fan in the cold-end air duct, so that the cold-end fan is not prone to frost and other problems; and arranging the hot-end fan in the hot-end air duct, so that the hot-end fan is not prone to dust accumulation, so as to achieve the purpose of reducing the failure rate of the cold-end fan and the hot-end fan and increasing the service life of the refrigerator.

[0060] The contents of the embodiments of the present application will be described in detail below with reference to the accompanying drawings so that those skilled in the art can understand the contents of the present application in more detail.

[0061] Figure 1 A cross-sectional view of a Stirling refrigerator provided in an embodiment of the present application at a first viewing angle; Figure 2 A cross-sectional view of a Stirling refrigerator provided in an embodiment of the present application at a second viewing angle; Figure 3 A cross-sectional view of a Stirling refrigerator provided in an embodiment of the present application from a third viewing angle.

[0062] Please refer to Figure 1-Figure 3 , this embodiment provides a Stirling refrigerator, comprising:

[0063] The housing 100 has a first opening on a first side surface along a first direction X. The shape of the housing 100 can be set as needed, for example, it can be a rectangular parallelepiped. The material of the housing 100 can be selected as needed, for example, it can be a metal housing with good thermal conductivity.

[0064] The liner 200 is disposed in the housing 100, and a second opening is provided on a first side wall of the liner 200 along the first direction X, wherein the first side wall is the side wall closest to the first side surface on the liner 200 (i.e., Figure 2 The inner container 200 is shaped to match the outer container 100 and may be, for example, rectangular. The material of the inner container 200 may be selected as needed, for example, it may be made of a metal with good thermal conductivity (e.g., aluminum alloy). A cavity 210 is formed within the inner container 200 for storing food or other items, allowing a user to place food or other items into the inner container 200.

[0065] The first insulation layer 300 is wrapped around the inner liner 200 to insulate the inner liner 200. The first insulation layer 300 can be made of polyurethane foam or a composite material of vacuum insulation panel and polyurethane foam. A third opening is defined in the first insulation layer 300, with the first opening, second opening, and third opening being positioned opposite each other.

[0066] Refrigerator door 400 is rotatably mounted within the first opening. When opened, door 400 reveals a second opening for users to access items. When closed, door 400 conceals the second opening, thereby providing insulation and preventing the escape of cold air from cavity 210. Door 400 is filled with a second insulation layer, which may also be made of polyurethane foam or a composite material of a vacuum insulation panel and polyurethane foam.

[0067] The refrigeration system includes a Stirling refrigerator 500, a cold-end fan 600, and a hot-end fan 700. The Stirling refrigerator 500 is connected to a cold-end heat exchanger 510 and a hot-end heat exchanger 520. The cold-end heat exchanger 510 can absorb heat to cool down, and the hot-end heat exchanger 520 can release heat to heat up.

[0068] The cold end air duct 800 is used for heat exchange with the inner liner 200; the cold end air duct 800 is arranged between the first insulation layer 300 and the inner liner 200, and the cold end fan 600 and the cold end heat exchanger 510 are both arranged in the cold end air duct 800, and the cold end air duct 800 is filled with dust-free air or nitrogen; dust-free air or nitrogen can be used as a medium for heat exchange with the inner liner 200, and heat exchange is carried out by contacting the side, bottom or top surface of the inner liner 200, so that the temperature in the cavity 210 of the inner liner 200 is reduced.

[0069] The hot-end air duct 900 is used for heat exchange with the outer shell 100. The hot-end air duct 900 is arranged between the first insulation layer 300 and the outer shell 100. The hot-end fan 700 and the hot-end heat exchanger 520 are both arranged in the hot-end air duct 900. The hot-end air duct 900 is filled with dust-free air or nitrogen. The dust-free air or nitrogen can be used as a medium for heat exchange with the outer shell 100. Heat is exchanged by contacting the side wall, bottom wall or top wall of the outer shell 100. The air in the external environment and the outer shell 100 then carry away the heat by natural convection.

[0070] In this embodiment, a cold-end air duct 800 is provided between the first insulation layer 300 and the inner liner 200, and a cold-end fan 600 and a cold-end heat exchanger 510 are provided within the cold-end air duct 800. The cold-end air duct 800 is a sealed cavity filled with dust-free air or nitrogen. During operation, the cold-end fan 600 is completely isolated from the space inside the inner liner 200, thereby preventing problems such as frost from forming. Furthermore, a hot-end air duct 900 is provided between the first insulation layer 300 and the outer shell 100, and a hot-end fan 700 and a hot-end heat exchanger 520 are provided within the hot-end air duct 900. The hot-end air duct 900 is a sealed cavity filled with dust-free air or nitrogen. During operation, the hot-end fan 700 is completely isolated from the external environment, thereby preventing dust from accumulating. As can be seen from the above description, this embodiment is beneficial for reducing the failure rate of the cold-end fan 600 and the hot-end fan 700, thereby improving the service life of the refrigerator.

[0071] In certain embodiments, the cold end air duct 800 of this embodiment includes a cold end main body 810 and a cold end heat exchange portion 820 connected to the cold end main body 810. The cold end main body 810 is disposed outside the top or bottom wall of the inner liner 200 along the second direction Y. The cold end main body 810 can be, for example, rectangular in shape, with a cavity formed therein. The cold end fan 600 and the cold end heat exchanger 510 are both disposed within the cold end main body 810. The cold end heat exchange portion 820 is connected to the cold end main body 810, and the two together form a closed space. The cold end heat exchange portion 820 is attached to at least the outside of the second side wall of the inner liner 200 along the first direction X, the outside of the third side wall of the inner liner 200 along the third direction Z, and / or the outside of the fourth side wall of the inner liner 200 along the third direction Z, so as to exchange heat with the inner liner 200.

[0072] The hot-end air duct 900 includes a hot-end main body 910 and a hot-end heat exchange portion 920 connected to the hot-end main body 910. The hot-end main body 910 is disposed on the same side as the cold-end main body 810 along the second direction Y. The hot-end main body 910 can be, for example, rectangular in shape, with a cavity formed therein. The hot-end fan 700 and the hot-end heat exchanger 520 are both disposed within the hot-end main body 910. The hot-end heat exchange portion 920 is connected to the hot-end main body 910, and the two together form an enclosed space. The hot-end heat exchange portion 920 is attached to at least the second side surface of the housing 100 along the first direction X, the third side surface of the housing 100 along the third direction Z, and / or the fourth side surface of the housing 100 along the third direction Z, to facilitate heat exchange with the housing 100.

[0073] In one possible implementation, Figure 1-Figure 3 As shown, the cold end main body 810 and the hot end main body 910 of this embodiment are both arranged outside the top wall of the inner container 200.

[0074] Specifically, the cold-end heat exchange portion 820 is disposed outside the third side wall of the inner liner 200 along the third direction Z, outside the fourth side wall of the inner liner 200 along the third direction Z, and outside the bottom wall of the inner liner 200; the cold-end heat exchange portion disposed outside the third side wall and the cold-end heat exchange portion disposed outside the fourth side wall are both connected to the cold-end main body and the cold-end heat exchange portion disposed outside the bottom wall, thereby forming a closed loop. The hot-end heat exchange portion 920 is disposed within the third side surface of the outer shell 100 along the third direction Z, within the fourth side surface of the outer shell 100 along the third direction Z, and within the bottom surface of the outer shell 100; the hot-end heat exchange portion disposed within the third side surface and the hot-end heat exchange portion disposed within the fourth side surface are both connected to the hot-end main body and the hot-end heat exchange portion disposed within the bottom surface, thereby forming a closed loop.

[0075] During heat exchange, the heat exchange medium in the cold-end air duct 800 is cooled within the cold-end heat exchanger 510. The low-temperature heat exchange medium is driven by the cold-end fan 600 toward the third sidewall, passing through the bottom wall and the fourth sidewall before reentering the cold-end heat exchanger 510 for cooling. During this flow, the heat exchange medium exchanges heat with the sidewalls and bottom wall of the inner liner 200, achieving a cooling effect. During this process, frost is less likely to form on the cold-end fan 600, thereby reducing the failure rate of the cold-end fan 600.

[0076] Similarly, the heat exchange medium within the hot-end air duct 900 is heated within the hot-end heat exchanger 520. The hot-end fan 700 then moves the high-temperature heat exchange medium toward the third side surface, passing through the bottom and fourth side surfaces before reentering the hot-end heat exchanger 520 for further heating. During this flow, the heat exchange medium exchanges heat with the side and bottom surfaces of the housing 100, achieving a heat dissipation effect. This process reduces dust accumulation on the hot-end fan 700, thereby reducing the risk of hot-end fan 700 failure.

[0077] In another possible implementation, the cold end main body 810 and the hot end main body 910 of this embodiment are both disposed outside the bottom wall of the inner container 200 .

[0078] The cold end heat exchange portion 820 is arranged outside the third side wall of the inner liner 200 along the third direction Z, outside the fourth side wall of the inner liner 200 along the third direction Z, and outside the top wall of the inner liner 200; the hot end heat exchange portion 920 is arranged inside the third side surface of the outer shell 100 along the third direction Z, inside the fourth side surface of the outer shell 100 along the third direction Z, and inside the top surface of the outer shell 100.

[0079] Similar to the above embodiment, this embodiment can also achieve heat exchange between the inner liner 200 and the outer shell 100 through the cold end air duct 800 and the hot end air duct 900, and can also effectively reduce the failure rate of the cold end fan 600 and the hot end fan 700.

[0080] In another possible implementation, the cold end main body 810 and the hot end main body 910 of this embodiment are both disposed outside the top wall of the inner container 200 .

[0081] The cold end heat exchange portion 820 is arranged outside the second side wall of the inner tank 200 along the first direction X. The cold end heat exchange portion 820 is provided with a first interface and a second interface connected to the cold end main body 810. The first interface and the second interface are respectively located at the two ends of the cold end heat exchange portion 820 in the third direction Z; a cold end partition is also provided in the cold end heat exchange portion 820. The cold end partition is arranged along the second direction Y and is located between the first interface and the second interface. At least one first notch is provided on the cold end partition.

[0082] The hot end heat exchange portion 920 is arranged within the second side surface of the shell 100 along the first direction X. The hot end heat exchange portion 920 is provided with a third interface and a fourth interface connected to the hot end main body 910. The third interface and the fourth interface are respectively located at the two ends of the hot end heat exchange portion 920 in the third direction Z; a hot end partition is also provided in the hot end heat exchange portion 920. The hot end partition is arranged along the second direction Y and is located between the third interface and the fourth interface. At least one second notch is provided on the hot end partition.

[0083] It is understandable that this embodiment can also circulate the heat exchange medium in the cold end air duct 800 and the hot end air duct 900, thereby smoothly achieving the purpose of heat exchange, and can also reduce the failure rate of the cold end fan 600 and the hot end fan 700.

[0084] In another possible implementation, the cold end main body 810 and the hot end main body 910 of this embodiment are both disposed outside the top wall of the inner container 200 .

[0085] The cold end heat exchange portion 820 is arranged outside the third side wall of the inner liner 200 along the third direction Z, outside the fourth side wall of the inner liner 200 along the third direction Z, and outside the bottom wall of the inner liner 200; the hot end heat exchange portion 920 is arranged inside the third side surface of the outer shell 100 along the third direction Z, inside the fourth side surface of the outer shell 100 along the third direction Z, and inside the second side surface of the outer shell 100 along the first direction X.

[0086] Different from the above embodiment, this embodiment increases the heat exchange area of the hot-end air duct 900 and can also effectively reduce the failure rate of the cold-end fan 600 and the hot-end fan 700.

[0087] Please continue to refer to Figure 1-Figure 3In one possible embodiment, the cold end heat exchange portion 820 of this embodiment is a sealed cavity connected to the cold end main body 810. A cold end bending plate is provided in the cold end heat exchange portion 820. The cold end bending plate arranged outside the side wall of the inner liner 200 is arranged along the second direction Y, and the cold end bending plate arranged outside the bottom wall of the inner liner 200 is arranged along the third direction Z. The two sides of the cold end bending plate are respectively connected to the two opposite inner walls of the cold end heat exchange portion 820 to divide the cold end heat exchange portion 820 into multiple adjacent cold end flow channels.

[0088] The above method can increase the heat exchange area in the cold end air duct 800, thereby helping to improve the overall heat exchange efficiency.

[0089] The hot end heat exchange portion 920 is a sealed cavity connected to the hot end main body 910. A hot end bending plate is provided in the hot end heat exchange portion 920. The hot end bending plate arranged in the side surface of the outer shell 100 is arranged along the second direction Y, and the hot end bending plate arranged in the bottom surface of the outer shell 100 is arranged along the third direction Z. The two sides of the hot end bending plate are respectively connected to the two opposite inner walls of the hot end heat exchange portion 920 to divide the hot end heat exchange portion 920 into multiple hot end flow channels adjacent to each other.

[0090] The above-mentioned method can increase the heat exchange area in the hot end air duct 900, thereby facilitating improvement of the overall heat exchange efficiency.

[0091] Optionally, in a plane perpendicular to the second direction Y, the cross-section of the cold-end flow channel disposed outside the side wall of the inner liner 200 is triangular, trapezoidal, rectangular, or U-shaped; the cross-section of the hot-end flow channel disposed within the side surface of the outer shell 100 is triangular, trapezoidal, rectangular, or U-shaped. In a plane perpendicular to the third direction Z, the cross-section of the cold-end flow channel disposed outside the bottom wall of the inner liner 200 is triangular, trapezoidal, rectangular, or U-shaped; the cross-section of the hot-end flow channel disposed within the bottom surface of the outer shell 100 is triangular, trapezoidal, rectangular, or U-shaped.

[0092] Figure 4 This is a cross-sectional view of a Stirling refrigerator provided in another embodiment of the present application. Figure 4 As shown, the cold end heat exchange portion 820 of this embodiment includes a plurality of cold end flow channels arranged parallel to each other along the second direction Y. The plurality of cold end flow channels are evenly spaced and connected to the cold end main body 810. The plurality of cold end flow channels and the cold end main body 810 together form a closed space. For example, the cold end flow channels can be formed by directly pressing corrugated board against the side wall of the inner liner 200.

[0093] The hot end heat exchange portion 920 includes a plurality of hot end flow channels arranged parallel to each other along the second direction Y. The plurality of hot end flow channels are evenly spaced and connected to the hot end main body 910. The plurality of hot end flow channels and the hot end main body 910 together form a closed space. For example, the hot end flow channels can be formed by directly pressing corrugated board against the outer surface of the first insulation layer 300.

[0094] Compared with the above embodiment, the method of this embodiment can save some materials of the cold-end heat exchange part 820 and the hot-end heat exchange part 920, which is conducive to the lightweight setting of the entire refrigerator.

[0095] Optionally, in a plane perpendicular to the second direction Y, the cross-section of the cold-end flow channel disposed outside the side wall of the inner liner 200 is triangular, trapezoidal, rectangular, or U-shaped; the cross-section of the hot-end flow channel disposed within the side surface of the outer shell 100 is triangular, trapezoidal, rectangular, or U-shaped. In a plane perpendicular to the third direction Z, the cross-section of the cold-end flow channel disposed outside the bottom wall of the inner liner 200 is triangular, trapezoidal, rectangular, or U-shaped; the cross-section of the hot-end flow channel disposed within the bottom surface of the outer shell 100 is triangular, trapezoidal, rectangular, or U-shaped.

[0096] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0097] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be interpreted broadly. For example, they may refer to fixed connection, detachable connection, or integration; they may refer to direct connection or indirect connection through an intermediate medium; they may refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0098] It should be noted that in the description of this application, the terms "first" and "second" are used solely to facilitate the description of different components and should not be understood to indicate or imply a sequential relationship, relative importance, or implicitly specify the number of technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0099] The various embodiments or implementation methods in this application are described in a progressive manner. Each embodiment focuses on the differences from other embodiments, and the same or similar parts between the various embodiments can be referenced to each other.

[0100] In the description of this application, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of this application. In this application, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in any appropriate manner in any one or more embodiments or examples.

[0101] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some or all of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A Stirling refrigerator, characterized in that: include: a housing, wherein a first opening is provided on a first side surface of the housing along a first direction; an inner liner, the inner liner being disposed in the outer shell, and having a second opening on a first side wall of the inner liner along the first direction, wherein the first side wall is the side wall of the inner liner closest to the first side surface; a first thermal insulation layer, the first thermal insulation layer being coated on the outer surface of the inner liner, the first thermal insulation layer being provided with a third opening, the first opening, the second opening and the third opening being arranged opposite to each other; a refrigerator door, the refrigerator door being rotatably mounted in the first opening and filled with a second insulation layer; A refrigeration system, comprising a Stirling refrigerator, a cold-end fan, and a hot-end fan, wherein the Stirling refrigerator is connected to a cold-end heat exchanger and a hot-end heat exchanger; a cold-end air duct, for performing heat exchange with the inner liner, the cold-end air duct being arranged between the first thermal insulation layer and the inner liner, the cold-end fan and the cold-end heat exchanger being both arranged in the cold-end air duct, and the cold-end air duct being filled with dust-free air or nitrogen; The hot end air duct is used for heat exchange with the shell. The hot end air duct is arranged between the first insulation layer and the shell. The hot end fan and the hot end heat exchanger are both arranged in the hot end air duct. The hot end air duct is filled with dust-free air or nitrogen.

2. The Stirling refrigerator according to claim 1, wherein: The cold end air duct includes a cold end main body and a cold end heat exchange part connected to the cold end main body; The cold end main body is arranged outside the top wall or bottom wall of the inner container along the second direction, and the cold end fan and the cold end heat exchanger are both arranged in the cold end main body; The cold end heat exchange portion is connected to the cold end main body portion, and the cold end heat exchange portion is attached to at least the outside of the second side wall of the inner liner along the first direction, the outside of the third side wall of the inner liner along the third direction, and / or the outside of the fourth side wall of the inner liner along the third direction; The hot end air duct includes a hot end main body and a hot end heat exchange part connected to the hot end main body; The hot end main body is arranged on the same side as the cold end main body along the second direction, and the hot end fan and the hot end heat exchanger are both arranged in the hot end main body; The hot end heat exchange portion is connected to the hot end main body, and the hot end heat exchange portion is at least attached to the second side surface of the shell along the first direction, the third side surface of the shell along the third direction, and / or the fourth side surface of the shell along the third direction.

3. The Stirling refrigerator according to claim 2, wherein: The cold end main body and the hot end main body are both arranged outside the top wall of the inner container; The cold end heat exchange portion is arranged outside the third side wall of the inner liner along the third direction, outside the fourth side wall of the inner liner along the third direction, and outside the bottom wall of the inner liner; The hot end heat exchange portion is disposed within a third side surface of the shell along the third direction, within a fourth side surface of the shell along the third direction, and within a bottom surface of the shell.

4. The Stirling refrigerator according to claim 2, wherein: The cold end main body and the hot end main body are both arranged outside the bottom wall of the inner container; The cold end heat exchange portion is arranged outside the third side wall of the inner liner along the third direction, outside the fourth side wall of the inner liner along the third direction, and outside the top wall of the inner liner; The hot end heat exchange portion is disposed within a third side surface of the shell along the third direction, within a fourth side surface of the shell along the third direction, and within a top surface of the shell.

5. The Stirling refrigerator according to claim 2, wherein: The cold end main body and the hot end main body are both arranged outside the top wall of the inner container; The cold end heat exchange portion is arranged outside the second side wall of the inner tank along the first direction, and the cold end heat exchange portion is provided with a first interface and a second interface connected to the cold end main body, and the first interface and the second interface are respectively located at two ends of the cold end heat exchange portion in the third direction; a cold end partition is further provided in the cold end heat exchange portion, and the cold end partition is arranged along the second direction and located between the first interface and the second interface, and the cold end partition is provided with at least one first notch; The hot end heat exchange portion is arranged within the second side surface of the shell along the first direction, and the hot end heat exchange portion is provided with a third interface and a fourth interface connected to the hot end main body, and the third interface and the fourth interface are respectively located at the two ends of the hot end heat exchange portion in the third direction; a hot end partition is also provided in the hot end heat exchange portion, and the hot end partition is arranged along the second direction and located between the third interface and the fourth interface, and at least one second notch is provided on the hot end partition.

6. The Stirling refrigerator according to claim 2, wherein: The cold end main body and the hot end main body are both arranged outside the top wall of the inner container; The cold end heat exchange portion is arranged outside the third side wall of the inner liner along the third direction, outside the fourth side wall of the inner liner along the third direction, and outside the bottom wall of the inner liner; The hot end heat exchange portion is disposed within a third side surface of the housing along the third direction, within a fourth side surface of the housing along the third direction, and within a second side surface of the housing along the first direction.

7. The Stirling refrigerator according to any one of claims 2 to 6, characterized in that: The cold end heat exchange portion is a sealed cavity connected to the cold end main body portion, and a cold end bent plate is provided in the cold end heat exchange portion. The cold end bent plate is arranged along the second direction, and two sides of the cold end bent plate are respectively connected to two opposite inner walls of the cold end heat exchange portion to divide the cold end heat exchange portion into a plurality of adjacent cold end flow channels; The hot end heat exchange portion is a sealed cavity connected to the hot end main body portion, and a hot end bending plate is provided in the hot end heat exchange portion. The hot end bending plate is arranged along the second direction, and the two sides of the hot end bending plate are respectively connected to the two opposite inner walls of the hot end heat exchange portion to divide the hot end heat exchange portion into a plurality of hot end flow channels adjacent to each other.

8. The Stirling refrigerator according to claim 7, wherein: In a plane perpendicular to the second direction, the cross-section of the cold end flow channel is triangular, trapezoidal, rectangular or U-shaped; the cross-section of the hot end flow channel is triangular, trapezoidal, rectangular or U-shaped.

9. The Stirling refrigerator according to any one of claims 2 to 6, characterized in that: The cold end heat exchange portion includes a plurality of cold end flow channels arranged in parallel along the second direction, the plurality of cold end flow channels are arranged at equal intervals and are all connected to the cold end main body; The hot end heat exchange portion includes a plurality of hot end flow channels arranged in parallel along the second direction. The plurality of hot end flow channels are arranged at equal intervals and are all connected to the hot end main body.

10. The Stirling refrigerator according to claim 9, wherein: In a plane perpendicular to the second direction, the cross-section of the cold end flow channel is triangular, trapezoidal, rectangular or U-shaped; the cross-section of the hot end flow channel is triangular, trapezoidal, rectangular or U-shaped.

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