Magnetic refrigeration device for a domestic refrigeration appliance and domestic refrigeration appliance

Abstract

The present application provides a magnetic refrigeration device for a household refrigeration appliance, comprising: a rotatable magnetic working substance bed having a plurality of fluid channels and a magnetic working substance; a magnetic field assembly for magnetizing and demagnetizing the magnetic working substance bed in a first angular range and a second angular range; at least one valve assembly. Each valve assembly comprises: a moving valve which is movably coupled to the magnetic working substance bed, a first moving valve channel and a second moving valve channel of the moving valve opening to the fluid channels at an inner side of the moving valve and opening at different radial positions at an outer side of the moving valve respectively; a static valve which is rotatably coupled to the outer side of the moving valve, a first static valve channel of the static valve opening to the first moving valve channel in the first angular range and connecting the first moving valve channel to a first opening, a second static valve channel of the static valve opening to the second moving valve channel in the second angular range and connecting the second moving valve channel to a second opening. The present application also provides a corresponding household refrigeration appliance. According to certain embodiments of the present application, the mixing of the heat exchange fluid can be prevented.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of household appliances, in particular to a magnetic refrigeration device for a household refrigeration appliance and to a household refrigeration appliance. BACKGROUND

[0002] Nowadays, with the improvement of people's living standards, refrigeration appliances have entered thousands of households, such as refrigerators, wine cabinets, etc. The current mainstream refrigeration method is mechanical vapor compression cycle refrigeration. This refrigeration technology not only has high energy consumption, but also uses refrigerants that can destroy the ozone environment in the upper atmosphere. The current alternative working medium has a high greenhouse effect index and flammability, which not only has low refrigeration efficiency, but also seriously affects the use of energy and the living environment of human beings.

[0003] In recent years, magnetic refrigeration technology has attracted much attention due to its high theoretical efficiency, no pollution, no noise, safety and reliability, etc. Magnetic refrigeration technology does not require the use of refrigerants that can destroy the ozone layer and exacerbate global warming, but is based on the magnetic heat effect of magnetic working medium to achieve refrigeration, i.e. the temperature of the magnetic working medium increases when it is magnetized and decreases when it is demagnetized.

[0004] In the existing magnetic refrigeration device, the rotary magnetic refrigeration device has the advantages of compact structure, high operating frequency, and good refrigeration effect. The rotary magnetic refrigeration device makes the magnetic working medium bear a changing magnetic field through the relative rotation between the magnetic field and the magnetic working medium bed, so that the magnetic working medium periodically undergoes a magnetic heat reaction. The heat exchange fluid exchanges heat with the magnetic working medium in the magnetic working medium bed and is heated and cooled, and then is pumped to the hot end heat exchanger and the cold end heat exchanger, respectively. The flow of the heat exchange fluid cooperates with the relative rotation between the magnetic field and the magnetic working medium bed, thereby realizing continuous refrigeration. However, in order to guide the circulating flow of the heat exchange fluid, the magnetic refrigeration device often has the problems of complex fluid flow path, non-compact structure, easy mixing of the heat exchange fluid, existence of a large amount of heat exchange fluid that does not participate in the refrigeration cycle, low refrigeration efficiency, etc. SUMMARY

[0005] It is an object of embodiments of the present application to provide an improved magnetic refrigeration device for a household refrigeration appliance and a corresponding household refrigeration appliance to overcome at least one of the above-mentioned deficiencies of the prior art.

[0006] According to a first aspect of the present invention, embodiments of the present invention provide a magnetic refrigeration device for a household refrigeration appliance, wherein the magnetic refrigeration device comprises: a magnetic working fluid bed arranged to be rotatable about a longitudinal axis, the magnetic working fluid bed forming a plurality of fluid channels extending in the direction of the longitudinal axis, and including a magnetic working fluid capable of heat exchange with heat exchange fluids within the fluid channels; a magnetic field assembly configured to apply a magnetic field to the magnetic working fluid bed relative to the longitudinal axis within a first angular range, and to demagnetize the magnetic working fluid bed within a second angular range different from the first angular range; and at least one valve assembly. Each valve assembly includes: a moving valve kinetically coupled to a longitudinal end of a magnetic working fluid bed, the moving valve having a first moving valve passage and a second moving valve passage, wherein, on the inner side of the moving valve facing the magnetic working fluid bed, the first moving valve passage and the second moving valve passage open to a fluid passage, and on the outer side of the moving valve facing away from the magnetic working fluid bed, the first moving valve passage and the second moving valve passage are respectively open relative to the longitudinal axis at a first radial position and a second radial position where they do not overlap; and a stationary valve rotatably connected to the outer side of the moving valve, the stationary valve having a first stationary valve passage and a second stationary valve passage, the first stationary valve passage at the first radial position opening to the first moving valve passage within a first angular range and communicating with a first opening, and the second stationary valve passage at the second radial position opening to the second moving valve passage within a second angular range and communicating with a second opening.

[0007] The aforementioned valve assembly guides the heat exchange fluid through the first opening, the first stationary valve channel, and the first moving valve channel into or out of the fluid channels within the first angular range of the magnetic working fluid bed, where the heat exchange fluid is heated. Simultaneously, it guides the heat exchange fluid through the second moving valve channel, the second stationary valve channel, and the second opening into or out of the fluid channels within the second angular range of the magnetic working fluid bed, where the heat exchange fluid is cooled. Since the first and second moving valve channels are open at non-overlapping first and second radial positions, respectively, and the first stationary valve channel at the first radial position connects to the first moving valve channel within the first angular range, and the second stationary valve channel at the second radial position connects to the second moving valve channel within the second angular range, mixing of the heat exchange fluid at the boundary between the first and second angular ranges is prevented. This valve assembly has a compact structure and small size. In particular, while preventing mixing of the heat exchange fluid, it allows as many, if not all, of the fluid channels flowing through the magnetic working fluid bed as possible to be connected to the first or second opening by the valve assembly, thereby reducing the amount of heat exchange fluid trapped and unable to participate in the refrigeration cycle. This improves refrigeration efficiency.

[0008] According to an optional embodiment of the invention, the magnetic working fluid bed is connected to the moving valve such that each of the plurality of fluid channels leads to at least one first moving valve channel and at least one second moving valve channel at the longitudinal end. This ensures that the heat exchange fluid in each fluid channel can be guided to the corresponding first or second opening as required by the refrigeration cycle.

[0009] According to an optional embodiment of the invention, the number of fluid channels leading to any one of the first actuating valve channels is no more than one; and / or the number of fluid channels leading to any one of the second actuating valve channels is no more than one. This helps to prevent mixing of the heated and cooled heat exchange fluids within the magnetic working fluid bed.

[0010] According to an optional embodiment of the invention, the first and second actuating valve channels are arranged alternately in a circumferential direction around the longitudinal axis. This arrangement makes the actuating valve structure simple and easy to manufacture.

[0011] According to an optional embodiment of the invention, at least one of the first and second actuating valve channels extends obliquely relative to the longitudinal axis. This structure enables the first and second actuating valve channels to open at different radial positions on the outside of the actuating valve, while also making the first and second actuating valve channels easy to manufacture.

[0012] According to an optional embodiment of the present invention, the first actuating valve passage and the second actuating valve passage extend parallel to the longitudinal axis. The first actuating valve passage is spaced a first distance from the longitudinal axis, and the second actuating valve passage is spaced a second distance from the longitudinal axis that is not equal to the first distance. This allows the first and second actuating valve passages to open at different radial positions on the outside of the actuating valve, and also helps to reduce the resistance to the heat exchange fluid.

[0013] According to an optional embodiment of the invention, the stationary valve blocks the second moving valve passage within a first angular range towards the inside of the moving valve, and blocks the first moving valve passage within a second angular range. Thus, a simple structure can be used to prevent fluid passages from being connected to an incorrect first or second opening.

[0014] According to an optional embodiment of the present invention, a first stationary valve passage includes a first arcuate groove disposed on the inner side of the stationary valve facing the moving valve, located within a first angular range. The first arcuate groove extends along an arc centered on a longitudinal axis, and its radial position relative to the longitudinal axis matches a first radial position and is opposite to at least two first moving valve passages. A second stationary valve passage includes a second arcuate groove disposed on the inner side of the stationary valve facing the moving valve, located within a second angular range. The second arcuate groove extends along an arc centered on a longitudinal axis, and its radial position matches a second radial position and is opposite to at least two second moving valve passages. This stationary valve structure is simple and can particularly effectively connect the first moving valve passages within the first angular range to a first opening and the second moving valve passages within the second angular range to a second opening.

[0015] According to an optional embodiment of the present invention, the first static valve passage further includes a first circular hole disposed on the outer side of the static valve opposite to the moving valve, each first circular hole connecting a first arc-shaped groove to a first opening; the second static valve passage further includes a second circular hole disposed on the outer side of the static valve opposite to the moving valve, each second circular hole connecting a second arc-shaped groove to a first opening. The shapes of the first and second circular holes facilitate connection with fluid pipelines. By combining the first circular hole with the first arc-shaped groove and / or the second circular hole with the second arc-shaped groove, the heat exchange fluid can be split and / or merged.

[0016] According to an optional embodiment of the present invention, the stationary valve includes a first component and a second component. A first arcuate groove and a second arcuate groove are formed in the first component and extend through the first component in the direction of the longitudinal axis. A first circular hole and a second circular hole are formed in the second component and extend through the second component in the direction of the longitudinal axis. The first component is fixedly connected to the second component. The separate first and second components can be manufactured separately, which helps to simplify the processing.

[0017] According to an alternative embodiment of the invention, the stationary valve is constructed as a single unit. This simplifies the assembly process and reduces the risk of heat exchange fluid leakage.

[0018] According to an optional embodiment of the invention, in the circumferential direction around the longitudinal axis, the arc interval between adjacent first and second arc grooves is set to be less than the arc spanned by the opening of either the first or second actuating valve passage on the inner side of the actuating valve. Alternatively or additionally, in the circumferential direction, the arc interval between adjacent first and second arc grooves is set to be less than 5 degrees. This allows for full utilization of all fluid channels. This is beneficial for reducing the size of the magnetic refrigeration device and improving refrigeration efficiency.

[0019] According to an optional embodiment of the present invention, a first angular range and a second angular range together form a complete circumference in the circumferential direction around the longitudinal axis; the first angular range includes two magnetized regions symmetrical about the longitudinal axis, and the second angular range includes two demagnetized regions symmetrical about the longitudinal axis, with the magnetized and demagnetized regions arranged alternately in the circumferential direction; the stationary valve is provided with two first arc-shaped grooves and two second arc-shaped grooves, each of the first arc-shaped grooves spanning an angular range corresponding to the angular range spanned by a corresponding magnetized region, and each of the second arc-shaped grooves spanning an angular range corresponding to the angular range spanned by a corresponding demagnetized region. This is beneficial for reducing the overall volume of the magnetic refrigeration device and making full use of the magnetic field space.

[0020] According to an optional embodiment of the invention, the valve assembly includes a sealing ring disposed between a stationary valve and a moving valve around a longitudinal axis. The sealing ring includes at least one of the following: a first sealing ring disposed radially inner to a first radial position and a second radial position relative to the longitudinal axis; a second sealing ring disposed radially between the first and second radial positions relative to the longitudinal axis; and a third sealing ring disposed radially outer to the first and second radial positions relative to the longitudinal axis. This prevents leakage or mixing of the heat exchange fluid.

[0021] According to an optional embodiment of the invention, a sealing groove for arranging a sealing ring is provided on the outer side of the moving valve and / or the inner side of the stationary valve facing the moving valve. This allows the sealing ring to be stably arranged between the stationary and moving valves. In particular, the sealing effect of the sealing ring can still be ensured even when the moving valve rotates relative to the stationary valve.

[0022] According to an optional embodiment of the invention, at least one of the sealing rings includes, in the direction of the longitudinal axis, a first soft layer adjacent to the moving valve, a second soft layer adjacent to the stationary valve, and an intermediate hard layer located between the first soft layer and the second soft layer, wherein the elasticity of the intermediate hard layer is less than that of the first soft layer and the second soft layer. This three-layer sealing ring has good sealing performance, especially good dynamic sealing performance.

[0023] According to an optional embodiment of the present invention, a first soft layer is fixedly connected to a moving valve, and an intermediate hard layer is fixedly connected to a stationary valve together with a second soft layer. One side of the intermediate hard layer has a cross-section that narrows towards the first soft layer and presses against the first soft layer. The second soft layer is fixedly connected to the stationary valve, and the intermediate hard layer is fixedly connected to the moving valve together with the first soft layer. One side of the intermediate hard layer has a cross-section that narrows towards the second soft layer and presses against the second soft layer. This improves the sealing effect.

[0024] According to a second aspect of the present invention, an embodiment of the present invention provides a household refrigeration appliance, wherein the household refrigeration appliance includes the magnetic refrigeration device according to the present invention. Attached Figure Description

[0025] The invention will now be described in more detail with reference to the accompanying drawings, which will provide a better understanding of its principles, features, and advantages. The drawings include:

[0026] Figure 1 A household refrigeration appliance according to an exemplary embodiment of the present invention is illustrated schematically;

[0027] Figure 2 A cross-sectional view of a magnetic refrigeration device according to an exemplary embodiment of the present invention is shown schematically;

[0028] Figure 3 schematically shown Figure 2 An exploded view of some components of the magnetic refrigeration device shown;

[0029] Figure 4 The driven valve is schematically shown from the perspective of its orientation toward the inside of the magnetic working fluid bed. Figure 3 A perspective view of the moving valve shown;

[0030] Figure 5 A side view of a magnetic working fluid bed according to an exemplary embodiment of the present invention is schematically shown, wherein the openings of the first moving valve passage and the second moving valve passage at the inside of the moving valve are shown;

[0031] Figure 6 A side view of a magnetic working fluid bed according to an exemplary embodiment of the present invention is schematically shown, wherein the openings of the first moving valve passage and the second moving valve passage at the inside of the moving valve are shown;

[0032] Figure 7 A perspective view of a stationary valve according to an exemplary embodiment of the present invention is schematically shown from the viewpoint of the stationary valve toward the inside of the moving valve.

[0033] Figure 8 A schematic view from the outside of the driven valve is shown. Figure 7 A perspective view of the moving valve in the illustrated embodiment;

[0034] Figure 9 An exploded view of a stationary valve according to an exemplary embodiment of the present invention is schematically shown; and

[0035] Figure 10 A sealing ring according to an exemplary embodiment of the present invention is illustrated schematically.

[0036] List of reference numerals

[0037] 1. Magnetic Refrigeration Device

[0038] 10 Magnetic working fluid bed

[0039] 11 Fluid Channels

[0040] 20 Magnetic Field Components

[0041] 21 Internal magnet

[0042] 22 External magnets

[0043] 23 Magnetic circuit yoke

[0044] 30 Valve Assembly

[0045] 31. Dynamic valve

[0046] 311 First moving valve passage

[0047] 312 Second moving valve passage

[0048] 32 Static Valve

[0049] 321 First static valve channel

[0050] 3211 First arc groove

[0051] 3212 First round hole

[0052] 322 Second static valve passage

[0053] 3221 Second arc groove

[0054] 3222 Second round hole

[0055] 323 First Component

[0056] 324 Second Component

[0057] O1 First Opening

[0058] O2 Second Opening

[0059] 33 Sealing ring

[0060] 331 First sealing ring

[0061] 332 Second sealing ring

[0062] 333 Third sealing ring

[0063] 334 First Soft Layer

[0064] 335 Intermediate Hard Layer

[0065] 336 Second soft layer

[0066] 313 Sealing groove

[0067] 325 Sealing Groove

[0068] 2. Heat exchange fluid

[0069] 3. Cold end heat exchanger

[0070] 4. Hot-end heat exchanger

[0071] 5 pumps

[0072] 6. Shell

[0073] L longitudinal axis

[0074] R1 First Angle Range

[0075] R2 Second Angle Range Detailed Implementation

[0076] To make the technical problems to be solved, the technical solutions, and the beneficial technical effects of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and several exemplary embodiments. It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of protection of this invention.

[0077] First, to facilitate understanding, let's return to the description in the background section. Existing magnetic refrigeration devices for household refrigeration appliances suffer from problems such as complex fluid flow paths, non-compact structures, easy mixing of heat exchange fluids, a large amount of stagnant heat exchange fluid that does not participate in the refrigeration cycle, and low refrigeration efficiency.

[0078] To address at least one of the aforementioned technical problems or other possible technical problems, an exemplary embodiment of the present invention provides a magnetic refrigeration device for a household refrigeration appliance, wherein the magnetic refrigeration device comprises: a magnetic working fluid bed arranged to be rotatable about a longitudinal axis, the magnetic working fluid bed forming a plurality of fluid channels extending in the direction of the longitudinal axis, and including a magnetic working fluid capable of heat exchange with heat exchange fluids within the fluid channels; a magnetic field assembly configured to apply a magnetic field to the magnetic working fluid bed relative to the longitudinal axis within a first angular range, and to demagnetize the magnetic working fluid bed within a second angular range different from the first angular range; and at least one valve assembly. Each valve assembly includes: a moving valve kinetically coupled to a longitudinal end of a magnetic working fluid bed, the moving valve having a first moving valve passage and a second moving valve passage, wherein, on the inner side of the moving valve facing the magnetic working fluid bed, the first moving valve passage and the second moving valve passage open to a fluid passage, and on the outer side of the moving valve facing away from the magnetic working fluid bed, the first moving valve passage and the second moving valve passage are respectively open relative to the longitudinal axis at a first radial position and a second radial position where they do not overlap; and a stationary valve rotatably connected to the outer side of the moving valve, the stationary valve having a first stationary valve passage and a second stationary valve passage, the first stationary valve passage at the first radial position opening to the first moving valve passage within a first angular range and communicating with a first opening, and the second stationary valve passage at the second radial position opening to the second moving valve passage within a second angular range and communicating with a second opening.

[0079] To better understand the present invention, exemplary embodiments of the present invention will now be described with reference to the accompanying drawings.

[0080] Before proceeding with the detailed description, it should be noted that the directional terms used in the description refer to the normal usage of household refrigeration appliances for ease of description, and should not be interpreted as absolute limitations on the corresponding characteristics.

[0081] Figure 1 A household refrigeration appliance according to an exemplary embodiment of the present invention is schematically illustrated. The household refrigeration appliance is configured herein as a refrigerator, comprising a magnetic refrigeration device 1 and a heat exchange fluid 2 flowing through the magnetic refrigeration device 1. The magnetic refrigeration device 1 is configured to heat and cool the heat exchange fluid 2 using the magnetocaloric effect. The magnetocaloric effect refers to the change in the ordered arrangement of magnetic moments of a magnetic material (i.e., a magnetic working fluid) when a change in an applied magnetic field occurs, causing the magnetic working fluid to absorb or release heat. The heat exchange fluid 2 can be, for example, water. The heat exchange fluid 2 can also be other fluids with good thermal conductivity, such as alcohol, ethylene glycol, glycerol, a solution doped with microscale graphite powder, or mixtures thereof. Figure 1An exemplary refrigerator is shown with a single compartment, which may be a refrigerator compartment or a freezer compartment. In another embodiment, the household refrigeration appliance may also be configured with multiple compartments, for example, configured as a combined refrigerator-freezer unit. Furthermore, the invention can be applied, as needed, to other household refrigeration appliances besides refrigerators, such as wine cabinets, air conditioners, etc.

[0082] like Figure 1 As shown, the household refrigeration appliance may further include: a cold-end heat exchanger 3 connected to a first end of the magnetic refrigeration device 1; a hot-end heat exchanger 4 connected to a second end of the magnetic refrigeration device 1; and a pump 5 for pumping heat exchange fluid 2, allowing the heat exchange fluid 2 to flow through the magnetic refrigeration device 1, the cold-end heat exchanger 3, and the hot-end heat exchanger 4. The household refrigeration appliance may also include a housing 6 defining a compartment for storing items to be cooled. The housing 6 may be formed as an insulated enclosure, for example comprising insulating foam formed by a foaming process.

[0083] The heat exchange fluid 2 flowing through the magnetic refrigeration device 1 exchanges heat with the magnetic working medium within the device, thereby being cooled and heated. The cooled heat exchange fluid 2 within the magnetic refrigeration device 1 can flow out from the first end of the device and be pumped to the cold-end heat exchanger 3 for cooling the chamber. Then, the heat exchange fluid 2 returns from the cold-end heat exchanger 3 to the magnetic refrigeration device 1 via the first end and is heated. The heated heat exchange fluid 2 within the magnetic refrigeration device 1 can flow out from the second end of the device and be pumped to the hot-end heat exchanger 4 to release heat, for example, to the external environment. Then, the heat exchange fluid 2 returns from the hot-end heat exchanger 4 to the magnetic refrigeration device 1 via the second end and is cooled again. Thus, a refrigeration cycle is achieved.

[0084] The following is combined Figure 2 and Figure 3 The magnetic refrigeration device 1 according to the present invention will be described in more detail. Figure 2 A cross-sectional view of a magnetic refrigeration device 1 according to an exemplary embodiment of the present invention is shown schematically. Figure 3 schematically shown Figure 2 An exploded view of some components of the magnetic refrigeration device 1 shown.

[0085] like Figure 2 As shown, the magnetic refrigeration device 1 includes: a magnetic working fluid bed 10, which is arranged to rotate about a longitudinal axis L, the magnetic working fluid bed 10 forming a plurality of fluid channels 11 extending in the direction of the longitudinal axis L, and including a magnetic working fluid capable of exchanging heat with the heat exchange fluid 2 in the fluid channels 11; and a magnetic field assembly 20, which is configured to apply a magnetic field to the magnetic working fluid bed 10 relative to the longitudinal axis L within a first angular range R1, and to demagnetize the magnetic working fluid bed 10 within a second angular range R2 different from the first angular range R1 (see [reference]). Figure 3The system includes at least one valve assembly 30. Each valve assembly 30 includes a moving valve 31 and a stationary valve 32. The moving valve 31 is kinetically coupled to the longitudinal end of the magnetic working fluid bed 10 and forms a first moving valve passage 311 and a second moving valve passage 312. On the inner side of the moving valve 31 facing the magnetic working fluid bed 10, the first moving valve passage 311 and the second moving valve passage 312 open to the fluid passage 11. On the outer side of the moving valve 31 facing away from the magnetic working fluid bed 10, the first moving valve passage 311 and the second moving valve passage 312 are open relative to the longitudinal axis L at a first radial position and a second radial position that do not overlap. The stationary valve 32 is rotatably connected to the outer side of the moving valve 31 and forms a first stationary valve passage 321 and a second stationary valve passage 322. The first stationary valve passage 321 opens at a first radial position to the first moving valve passage 311 within a first angular range R1 and connects to the first opening O1. The second stationary valve passage 322 opens at a second radial position to the second moving valve passage 312 within a second angular range R2 and connects to the second opening O2. Specifically, the stationary valve 32 and the magnetic field assembly 20 can be arranged statically. During operation of the magnetic refrigeration device 1, the magnetic field assembly 20 can generate a stationary magnetic field. This magnetic field covers the first angular range R1 but avoids the second angular range R2. Alternatively, the magnetic field has a larger magnetic field strength in the first angular range R1 and a smaller magnetic field strength in the second angular range R2. For example, as... Figure 2 As shown, the magnetic field assembly 20 may include an inner magnet 21 arranged radially inward of the magnetic working fluid bed 10, an outer magnet 22 arranged radially outward of the magnetic working fluid bed 10, and a magnetic loop yoke 23. The outer magnet 22 surrounds the magnetic working fluid bed 10 only radially outward within a first angular range R1, thereby forming a magnetic field covering the first angular range R1 together with the inner magnet 21. The magnetic loop yoke 23 surrounds the outer magnet 22 radially outward to further reduce the influence of the magnetic field on a second angular range R2. The magnetic working fluid bed 10 rotates about its longitudinal axis L, such that the fluid channel 11 of the magnetic working fluid bed 10 periodically passes through a magnetized region (i.e., the first angular range R1) covered by a stronger magnetic field and a demagnetized region (i.e., the second angular range R2) covered by a weaker magnetic field or even not covered by a magnetic field. The actuating valve 31 rotates with the magnetic working fluid bed 10 and opens to the fluid channel 11 through a first actuating valve channel 311 and a second actuating valve channel 312. The stationary valve 32 selectively connects the first moving valve passage 311 and the second moving valve passage 312 to the first opening O1 and the second opening O2. The first opening O1 and the second opening O2 can then be connected to the cold end heat exchanger 3 or the hot end heat exchanger 4 via fluid pipelines.

[0086] The valve assembly 30 described above guides the heat exchange fluid 2 into or out of the fluid channel 11 of the magnetic working fluid bed 10, located within the first angle range R1, via the first opening O1, the first stationary valve channel 321, and the first moving valve channel 311, where the heat exchange fluid 2 is heated. Simultaneously, it guides the heat exchange fluid 2 into or out of the fluid channel 11 of the magnetic working fluid bed 10, located within the second angle range R2, via the second moving valve channel 312, the second stationary valve channel 322, and the second opening O2, where the heat exchange fluid 2 is cooled. Since the first moving valve channel 311 and the second moving valve channel 312 are open at a first radial position and a second radial position respectively, without overlapping, and the first stationary valve channel 321 connects to the first moving valve channel 311 within the first angle range R1 at the first radial position, and the second stationary valve channel 322 connects to the second moving valve channel 312 within the second angle range R2 at the second radial position, mixing of the heat exchange fluid 2 at the boundary between the first angle range R1 and the second angle range R2 can be prevented. This improves refrigeration efficiency.

[0087] exist Figure 2 In the illustrated embodiment, the at least one valve assembly 30 includes two valve assemblies 30, respectively arranged at two longitudinal ends of the magnetic working fluid bed 10. For example, one of the two valve assemblies 30 may be arranged such that the first opening O1 of its stationary valve 32 is connected via a fluid line to the outlet of the cold-end heat exchanger 3, and the second opening O2 of its stationary valve 32 is connected via a fluid line to the inlet of the cold-end heat exchanger 3. Correspondingly, the other of the two valve assemblies 30 may be arranged such that the first opening of its stationary valve is connected via a fluid line to the inlet of the hot-end heat exchanger 4, and the second opening of its stationary valve is connected via a fluid line to the outlet of the hot-end heat exchanger 4.

[0088] Figure 3 The magnetic working fluid bed 10 and the valve assembly 30 connected to one of its longitudinal ends are shown schematically in an exploded view. Figure 3 The diagram illustrates a first angular range R1 and a second angular range R2. In a circumferential direction around the longitudinal axis L, the first angular range R1 and the second angular range R2 together form a complete circle. The first angular range R1 may include two magnetization regions symmetrical about the longitudinal axis L, and the second angular range R2 may include two demagnetization regions symmetrical about the longitudinal axis L. The magnetization and demagnetization regions are arranged alternately in the circumferential direction.

[0089] like Figure 3As shown, the magnetic working fluid bed 10 can be constructed as a cylinder around a longitudinal axis L, with the plurality of fluid channels 11 uniformly distributed in its circumferential direction. Adjacent fluid channels 11 are separated by partition walls. This magnetic working fluid bed 10 is particularly suitable for rotary magnetic refrigeration devices 1 and is advantageous for making full use of the magnetic field space. The magnetic working fluid can, for example, be filled within the fluid channels 11, thereby enabling direct contact with the heat exchange fluid 2 flowing through the fluid channels 11 for sufficient heat exchange. The magnetic working fluid bed 10 can be made of a material with good thermal insulation properties, such as stainless steel or plastic with good thermal insulation properties. The magnetic working fluid bed 10 can also be manufactured by nesting a plastic layer within a stainless steel material. The magnetic working fluid is a material with a magnetocaloric effect, including but not limited to metallic room-temperature magnetocaloric materials (e.g., gadolinium, gadolinium-dysprosium alloy, manganese-arsenic alloy, nickel-manganese-gallium alloy, etc.), ceramic room-temperature magnetocaloric materials (e.g., perovskite-structured lanthanum-calcium-manganese-oxygen materials, etc.), or combinations thereof. The magnetic working fluid may include a composite room-temperature magnetocaloric material with high thermal conductivity, i.e., a material obtained by combining a high thermal conductivity material with a room-temperature magnetocaloric material. The actuating valve 31 may be provided with a connecting flange for connecting to the magnetic working fluid bed 10, which, for example, has multiple connecting holes, allowing the actuating valve 31 to be fixed to the magnetic working fluid bed 10 by bolts or the like passing through the connecting holes. Additionally, the actuating valve 31 may have a boss located on its outer side, and the stationary valve 32 may be fitted onto this boss.

[0090] exist Figure 3 In the diagram, the moving valve 31 is shown only on its outer side facing away from the magnetic working fluid bed 10. Figure 4 The view of the driven valve 31 toward the inside of the magnetic working fluid bed 10 is schematically shown. Figure 3 The diagram shows a perspective view of the actuating valve 31. In this embodiment, the first actuating valve passage 311 and the second actuating valve passage 312 are arranged alternately in a circumferential direction around the longitudinal axis L. Inside the actuating valve 31, the first actuating valve passage 311 and the second actuating valve passage 312 may, for example, open at at least approximately the same radial position, such as... Figure 4 As shown. This facilitates aligning the first moving valve channel 311 and the second moving valve channel 312 both inside the moving valve 31 with the fluid channel 11 arranged along the circumferential direction of the magnetic working fluid bed 10.

[0091] Figure 5 A schematic side view of a magnetic working fluid bed 10 according to an exemplary embodiment of the present invention is shown, illustrating the openings of the first moving valve channel 311 and the second moving valve channel 312 inside the moving valve 31. Figure 5As shown, the magnetic working fluid bed 10 is connected to the actuating valve 31 such that each of the plurality of fluid channels 11 leads at its longitudinal end to at least one first actuating valve channel 311 and at least one second actuating valve channel 312 (here, exactly one first actuating valve channel 311 and exactly one second actuating valve channel 312). This ensures that the heat exchange fluid 2 within each fluid channel 11 can be guided to the corresponding first opening O1 or second opening O2 as required by the refrigeration cycle.

[0092] Optionally, the number of fluid channels 11 leading to any one of the first actuating valve channels 311 shall not exceed one. This prevents mixing of the heated and cooled heat exchange fluids 2 within the magnetic working fluid bed 10. Similarly, the number of fluid channels 11 leading to any one of the second actuating valve channels 312 shall not exceed one.

[0093] To allow the first actuating valve passage 311 and the second actuating valve passage 312 to open at a first radial position and a second radial position that do not overlap, respectively, at least one of the first actuating valve passage 311 and the second actuating valve passage 312 can extend obliquely relative to the longitudinal axis L. This structure makes the first actuating valve passage 311 and the second actuating valve passage 312 easy to manufacture. Figure 2 As shown, both the first moving valve channel 311 and the second moving valve channel 312 can extend obliquely relative to the longitudinal axis L, and their oblique angles are different. Figure 2 In the illustrated embodiment, viewed from the inside out of the driven valve 31, both the first actuating valve passage 311 and the second actuating valve passage 312 are radially inward relative to the longitudinal axis L. This reduces the volume of the valve assembly 30. Here, the inclination angle of the first actuating valve passage 311 is smaller, so that at the outside of the actuating valve 31, the first actuating valve passage 311 is open radially outward of the second actuating valve passage 312. In another embodiment, one of the first actuating valve passage 311 and the second actuating valve passage 312 may extend parallel to the longitudinal axis L, while the other extends obliquely relative to the longitudinal axis L; or the first actuating valve passage 311 and the second actuating valve passage 312 may extend radially inward and radially outward relative to the longitudinal axis L, respectively.

[0094] Figure 6 A schematic side view of a magnetic working fluid bed 10 according to an exemplary embodiment of the present invention is shown, illustrating the openings of a first moving valve channel 311 and a second moving valve channel 312 at the inside of the moving valve 31. Figure 5Similar to the embodiment shown, the magnetic working fluid bed 10 is connected to the moving valve 31 such that each of the plurality of fluid channels 11 leads to a first moving valve channel 311 and a second moving valve channel 312 at the longitudinal end. Each first moving valve channel 311 leads to exactly one fluid channel 11, and each second moving valve channel 312 leads to exactly one fluid channel 11.

[0095] and Figure 5 The difference in the illustrated embodiment is that, Figure 6 In the illustrated embodiment, the first actuating valve passage 311 and the second actuating valve passage 312 extend parallel to the longitudinal axis L. The first actuating valve passage 311 is spaced a first distance from the longitudinal axis L, and the second actuating valve passage 312 is spaced a second distance from the longitudinal axis L that is not equal to the first distance. This helps to reduce the resistance to the heat exchange fluid 2.

[0096] The following is combined Figure 7 and Figure 8 A valve assembly 30 according to an exemplary embodiment of the present invention will be further described. Figure 7 A perspective view of the stationary valve 32, viewed from the inside of the moving valve 31, is schematically shown according to an exemplary embodiment of the present invention. Figure 8 A schematic view from the outside of the driven valve 31 shows Figure 7 A perspective view of the moving valve 31 in the illustrated embodiment.

[0097] like Figure 7 As shown, the first static valve passage 321 of the static valve 32 may include a first arcuate groove 3211 disposed on the inner side of the static valve 32 facing the moving valve 31 and located within a first angle range R1. The first arcuate groove 3211 extends along an arc centered on the longitudinal axis L. Figure 8 As shown, the radial position of the first arcuate groove 3211 relative to the longitudinal axis L (schematically shown here in dashed lines) matches a first radial position and is opposite to at least two first actuating valve passages 311. Similarly, the second stationary valve passage 322 may include a second arcuate groove 3221 disposed on the inner side of the stationary valve 32 facing the actuating valve 31, located within a second angular range R2, the second arcuate groove 3221 extending along an arc centered on the longitudinal axis L. The radial position of the second arcuate groove 3221 (schematically shown here in dashed lines) matches a second radial position and is opposite to at least two second actuating valve passages 312. Figure 7 It can be seen that the inner side of the static valve 32 blocks the second moving valve passage 312 within the first angle range R1, and blocks the first moving valve passage 311 within the second angle range R2.

[0098] In the radial direction, the first arc-shaped groove 3211 and the second arc-shaped groove 3221 are offset from each other. In the circumferential direction around the longitudinal axis L, the first arc-shaped groove 3211 and the second arc-shaped groove 3221 are adjacent to each other. In particular, in the circumferential direction, the arc interval between adjacent first arc-shaped grooves 3211 and second arc-shaped grooves 3221 can be set to be less than the arc spanned by the opening of either the first moving valve passage 311 or the second moving valve passage 312 on the inner side of the moving valve 31. Alternatively or additionally, in the circumferential direction, the arc interval between adjacent first arc-shaped grooves 3211 and second arc-shaped grooves 3221 can be set to be less than 5 degrees. Thus, all fluid passages 11 can be fully utilized. This is beneficial for reducing the volume of the magnetic refrigeration device 1 and improving the refrigeration efficiency.

[0099] In contrast, when all the moving valve passages of the moving valve 31 are open on the same circumference outside the moving valve 31, the first arcuate groove 3211 and the second arcuate groove 3221 of the stationary valve 32 are also correspondingly located on the same circumference. Sufficient distance must be maintained between adjacent first arcuate grooves 3211 and second arcuate grooves 3221; otherwise, mixing of the heat exchange fluid 2 can easily occur. Specifically, adjacent first arcuate grooves 3211 and second arcuate grooves 3221 need to be spaced at least the angular range spanned by a fluid channel 11, such that the at least one fluid channel 11 does not lead to either the first arcuate groove 3211 or the second arcuate groove 3221. Therefore, the heat exchange fluid 2 within the at least one fluid channel 11 is retained within the magnetic working fluid bed 10 and does not participate in the refrigeration cycle. The magnetic refrigeration device 1 according to an embodiment of the present invention can effectively prevent this from happening.

[0100] Preferably, the static valve 32 is provided with two first arc-shaped grooves 3211 and two second arc-shaped grooves 3221 to match the magnetization zone and the demagnetization zone. The angle range spanned by each of the first arc-shaped grooves 3211 is consistent with the angle range spanned by a corresponding magnetization zone, and the angle range spanned by each of the second arc-shaped grooves 3221 is consistent with the angle range spanned by a corresponding demagnetization zone.

[0101] See Figure 3 The first static valve passage 321 may further include a first circular hole 3212 disposed on the outer side of the static valve 32 opposite to the moving valve 31, each first circular hole 3212 connecting a first arc-shaped groove 3211 to a first opening O1. The combination of the first circular hole 3212 and the first arc-shaped groove 3211 allows for the diversion or convergence of the heat exchange fluid 2. The shape of the first circular hole 3212 facilitates connection to a fluid pipeline. Similarly, the second static valve passage 322 also includes a second circular hole 3222 disposed on the outer side of the static valve 32 opposite to the moving valve 31, each second circular hole 3222 connecting a second arc-shaped groove 3221 to a second opening O2. Figure 3In the illustrated embodiment, the stationary valve 32 is constructed as a single unit. This simplifies the assembly process and reduces the risk of leakage of the heat exchange fluid 2.

[0102] In other embodiments, such as... Figure 9 As shown, the stationary valve 32 includes a first component 323 and a second component 324. A first arcuate groove 3211 and a second arcuate groove 3221 are formed in the first component 323 and extend through the first component 323 in the direction of the longitudinal axis L. A first circular hole 3212 and a second circular hole 3222 are formed in the second component 324 and extend through the second component 324 in the direction of the longitudinal axis L. The first component 323 is fixedly connected to the second component 324. The first component 323 and the second component 324 can be manufactured separately, which simplifies the manufacturing process.

[0103] Now back Figure 2 In this embodiment, the valve assembly 30 further includes a sealing ring 33 arranged around the longitudinal axis L between the stationary valve 32 and the moving valve 31. The sealing ring 33 may include at least one of a first sealing ring 331, a second sealing ring 332, and a third sealing ring 333. The first sealing ring 331 is arranged radially inside a first radial position and a second radial position in the radial direction relative to the longitudinal axis L. The second sealing ring 332 is arranged between the first and second radial positions in the radial direction relative to the longitudinal axis L. The third sealing ring 333 is arranged radially outside the first and second radial positions in the radial direction relative to the longitudinal axis L. This prevents leakage or mixing of the heat exchange fluid 2.

[0104] See Figure 7 The inner side of the stationary valve 32 may be provided with a sealing groove 325 for arranging the sealing ring 33. Alternatively or additionally, see Figure 8 A sealing groove 313 for arranging a sealing ring 33 may be provided on the outer side of the actuating valve 31. Thus, the sealing ring 33 can be stably arranged between the stationary valve 32 and the actuating valve 31. In particular, the sealing effect of the sealing ring 33 can still be ensured even when the actuating valve 31 rotates relative to the stationary valve 32.

[0105] Figure 10 A sealing ring 33 according to an exemplary embodiment of the present invention is schematically shown. For example... Figure 10 As shown, at least one of the sealing rings 33 includes, in the direction of the longitudinal axis L, a first soft layer 334 adjacent to the moving valve 31, a second soft layer 336 adjacent to the stationary valve 32, and an intermediate hard layer 335 located between the first soft layer 334 and the second soft layer 336, wherein the elasticity of the intermediate hard layer 335 is less than that of the first soft layer 334 and the second soft layer 336. This three-layer sealing ring 33 has a good sealing effect, especially a good dynamic sealing effect.

[0106] Optionally, the first soft layer 334 may be fixedly connected to the moving valve 31, and the intermediate hard layer 335, together with the second soft layer 336, may be fixedly connected to the stationary valve 32. One side of the intermediate hard layer 335 may have a cross-section that narrows towards the first soft layer 334 and presses against the first soft layer 334. The first soft layer 334 and the second soft layer 336 may be applied, for example, by coating into the sealing grooves 313, 325 of the moving valve 31 and the stationary valve 32.

[0107] Alternatively, the second soft layer 336 may be fixedly connected to the stationary valve 32, and the intermediate hard layer 335 together with the first soft layer 334 may be fixedly connected to the dynamic valve 31. One side of the intermediate hard layer 335 has a cross-section that narrows toward the second soft layer 336 and presses against the second soft layer 336.

[0108] In addition, in such Figure 9 In the static valve 32 with a split configuration shown, seals may also be provided in the first component 323 and the second component 324 respectively to prevent leakage or mixing of the heat exchange fluid 2.

[0109] It should be understood that the terms "first," "second," etc., used herein are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include at least one of that feature. In this document, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0110] Although specific embodiments have been described above, these embodiments are not intended to limit the scope of the invention, even when only a single embodiment is described with respect to a particular feature. The feature examples provided in this disclosure are intended to be illustrative and not limiting, unless otherwise stated. In practice, multiple features may be combined with each other as needed and where technically feasible. In particular, features from different embodiments may also be combined with each other. Various substitutions, changes, and modifications are conceived without departing from the spirit and scope of the invention.

Claims

1. A magnetic refrigeration device (1) for a domestic refrigeration appliance, wherein, The magnetic refrigeration device (1) comprises: a magnetic regenerator bed (10) arranged rotatable about a longitudinal axis (L), the magnetic regenerator bed (10) being formed with a plurality of fluid channels (11) through in the direction of the longitudinal axis (L) and comprising a magnetic regenerator exchangeable with a heat exchange fluid (2) within the fluid channels (11); a magnetic field assembly (20) arranged to apply a magnetic field to the magnetic regenerator bed (10) within a first angular range (R1) relative to the longitudinal axis (L) and to demagnetize the magnetic regenerator bed (10) within a second angular range (R2) different from the first angular range (R1); and at least one valve assembly (30), each valve assembly (30) comprising: a dynamic valve (31) kinematically coupled to a longitudinal end of the magnetic regenerator bed (10), the dynamic valve (31) being formed with a first dynamic valve channel (311) and a second dynamic valve channel (312), wherein, on an inner side of the dynamic valve (31) facing the magnetic regenerator bed (10), the first dynamic valve channel (311) and the second dynamic valve channel (312) open into the fluid channels (11), on an outer side of the dynamic valve (31) facing away from the magnetic regenerator bed (10), the first dynamic valve channel (311) and the second dynamic valve channel (312) open relative to the longitudinal axis (L) at a first radial position and a second radial position, respectively, which are non-overlapping with each other; and a static valve (32) connected to the outer side of the dynamic valve (31) in a relatively rotatable manner, the static valve (32) being formed with a first static valve channel (321) and a second static valve channel (322), the first static valve channel (321) opening into the first dynamic valve channel (311) within the first angular range (R1) at the first radial position and communicating it to a first opening (01), the second static valve channel (322) opening into the second dynamic valve channel (312) within the second angular range (R2) at the second radial position and communicating it to a second opening (02).

2. The magnetic refrigeration device (1) according to claim 1, wherein the magnetic regenerator bed (10) is connected with the dynamic valve (31) such that: each of the plurality of fluid channels (11) opens into at least one first dynamic valve channel (311) and at least one second dynamic valve channel (312) at the longitudinal end; and / or the number of fluid channels (11) opening into any one first dynamic valve channel (311) is not more than one; and / or the number of fluid channels (11) opening into any one second dynamic valve channel (312) is not more than one.

3. The magnetic refrigeration device (1) according to claim 1 or 2, wherein the first dynamic valve channels (311) and the second dynamic valve channels (312) are arranged alternately in a circumferential direction around the longitudinal axis (L).

4. The magnetic refrigeration device (1) according to any one of claims 1 to 3, wherein at least one of the first dynamic valve channels (311) and the second dynamic valve channels (312) extends obliquely relative to the longitudinal axis (L); or the first dynamic valve channels (311) and the second dynamic valve channels (312) are arranged in a staggered manner relative to the longitudinal axis (L). The first (311) and second (312) dynamic valve passages extend parallel to the longitudinal axis (L), the first dynamic valve passages (311) being at a first distance from the longitudinal axis (L), the second dynamic valve passages (312) being at a second distance from the longitudinal axis (L) which is different from the first distance.

5. Magnetic refrigeration device (1) according to any one of claims 1 to 4, wherein The inner side of the static valve (32) facing the dynamic valve (31) blocks the second dynamic valve passages (312) in the first angular range (R1) and blocks the first dynamic valve passages (311) in the second angular range (R2).

6. Magnetic refrigeration device (1) according to any one of claims 1 to 5, wherein The first static valve passages (321) comprise first arc-shaped grooves (3211) provided on the inner side of the static valve (32) facing the dynamic valve (31) in the first angular range (R1), the first arc-shaped grooves (3211) extending along a circular arc centered on the longitudinal axis (L), the radial position of the first arc-shaped grooves (3211) matching the first radial position and being opposite the at least two first dynamic valve passages (311) with respect to the longitudinal axis (L); The second static valve passages (322) comprise second arc-shaped grooves (3221) provided on the inner side of the static valve (32) facing the dynamic valve (31) in the second angular range (R2), the second arc-shaped grooves (3221) extending along a circular arc centered on the longitudinal axis (L), the radial position of the second arc-shaped grooves (3221) matching the second radial position and being opposite the at least two second dynamic valve passages (312) with respect to the longitudinal axis (L).

7. Magnetic refrigeration device (1) according to claim 6, wherein The first static valve passages (321) further comprise first circular holes (3212) provided on the outer side of the static valve (32) facing away from the dynamic valve (31), each first circular hole (3212) respectively communicating one first arc-shaped groove (3211) to the first opening (01); The second static valve passages (322) further comprise second circular holes (3222) provided on the outer side of the static valve (32) facing away from the dynamic valve (31), each second circular hole (3222) respectively communicating one second arc-shaped groove (3221) to the second opening (02).

8. Magnetic refrigeration device (1) according to claim 7, wherein The static valve (32) comprises a first part (323) and a second part (324), the first arc-shaped grooves (3211) and the second arc-shaped grooves (3221) being formed in the first part (323) and passing through the first part (323) in the direction of the longitudinal axis (L), the first circular holes (3212) and the second circular holes (3222) being formed in the second part (324) and passing through the second part (324) in the direction of the longitudinal axis (L), the first part (323) being fixedly connected to the second part (324); or The static valve (32) is configured as a one-piece part.

9. Magnetic refrigeration device (1) according to any one of claims 6 to 8, wherein In a circumferential direction around the longitudinal axis (L), the first arcuate grooves (3211) and the second arcuate grooves (3221) are arranged at an angle apart from each other, which is: less than an angle spanned by the opening on the inner side of the moveable valve (31) of either the first moveable valve passage (311) or the second moveable valve passage (312); and / or less than 5 degrees.

10. The magnetic refrigeration device (1) according to any one of claims 6 to 9, wherein in a circumferential direction around the longitudinal axis (L), the first angular range (R1) and the second angular range (R2) together enclose a complete circumference; the first angular range (R1) comprises two magnetization zones which are symmetrical about the longitudinal axis (L), and the second angular range (R2) comprises two demagnetization zones which are symmetrical about the longitudinal axis (L), the magnetization zones and the demagnetization zones being arranged alternately in the circumferential direction; the static valve (32) is provided with two first arcuate grooves (3211) and two second arcuate grooves (3221), each of the first arcuate grooves (3211) spanning an angular range which is identical to that of a corresponding magnetization zone, and each of the second arcuate grooves (3221) spanning an angular range which is identical to that of a corresponding demagnetization zone.

11. The magnetic refrigeration device (1) according to any one of claims 1 to 10, wherein the valve assembly (30) comprises a sealing ring (33) arranged between the static valve (32) and the moveable valve (31) around the longitudinal axis (L), the sealing ring (33) comprising at least one of: a first sealing ring (331) arranged radially inside the first radial position and the second radial position in a radial direction relative to the longitudinal axis (L); a second sealing ring (332) arranged between the first radial position and the second radial position in the radial direction relative to the longitudinal axis (L); a third sealing ring (333) arranged radially outside the first radial position and the second radial position in the radial direction relative to the longitudinal axis (L).

12. The magnetic refrigeration device (1) according to claim 11, wherein the outer side of the moveable valve (31) and / or the inner side of the static valve (32) facing the moveable valve (31) is provided with a sealing groove (313, 325) for arranging the sealing ring (33).

13. The magnetic refrigeration device (1) according to claim 11 or 12, wherein at least one of the sealing rings (33) comprises, in the direction of the longitudinal axis (L), a first soft layer (334) abutting the moveable valve (31), a second soft layer (336) abutting the static valve (32), and an intermediate hard layer (335) between the first soft layer (334) and the second soft layer (336), wherein the intermediate hard layer (335) has a smaller elasticity than the first soft layer (334) and the second soft layer (336).

14. The magnetic refrigeration device (1) according to claim 13, wherein The first soft layer (334) is fixedly connected to the moving valve (31), the intermediate hard layer (335) is fixedly connected to the static valve (32) together with the second soft layer (336), one side of the intermediate hard layer (335) has a cross section narrowing in the direction of the first soft layer (334) and is pressed against the first soft layer (334); The second soft layer (336) is fixedly connected to the static valve (32), the intermediate hard layer (335) is fixedly connected to the moving valve (31) together with the first soft layer (334), one side of the intermediate hard layer (335) has a cross section narrowing in the direction of the second soft layer (336) and is pressed against the second soft layer (336).

15. A domestic refrigeration appliance comprising: The household refrigeration appliance comprises the magnetic refrigeration device (1) according to any one of claims 1-14.

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