CN111059839B

CN111059839B - Control method for refrigerating and freezing device and refrigerating and freezing device

Info

Publication number: CN111059839B
Application number: CN201911382744.3A
Authority: CN
Inventors: 刘煜森; 李靖; 万新明; 孙永升; 陶瑞涛
Original assignee: Qingdao Haier Refrigerator Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Current assignee: Qingdao Haier Refrigerator Co Ltd; Qingdao Haier Smart Technology R&D Co Ltd; Haier Smart Home Co Ltd
Priority date: 2019-12-27
Filing date: 2019-12-27
Publication date: 2023-06-20
Anticipated expiration: 2039-12-27
Also published as: CN111059839A

Abstract

The invention provides a control method for a refrigeration and freezing device and the refrigeration and freezing device. The refrigeration and freezer includes a housing defining at least one compartment, a vapor compression refrigeration system for cooling the at least one compartment, and a Stirling refrigeration system for cooling the at least one compartment. The control method comprises the following steps: judging whether the condition that the vapor compression refrigeration system and the Stirling refrigeration system are simultaneously switched from the off state to the on state is met; if yes, starting the Stirling refrigerating system, controlling the Stirling refrigerator to rise to target power from preset initial power at preset first time intervals, starting the vapor compression refrigerating system and the Stirling refrigerating system to supply cold together after the power of the Stirling refrigerator reaches the target power, so as to reduce vibration noise of the compressor and the Stirling refrigerator, reduce the maximum power of the whole machine, and improve the refrigerating efficiency in the initial stage of refrigeration by utilizing lower cold end temperature of the Stirling refrigerator.

Description

Control method for refrigerating and freezing device and refrigerating and freezing device

Technical Field

The present invention relates to the field of refrigeration, and more particularly, to a control method for a refrigeration and freezing apparatus and a refrigeration and freezing apparatus.

Background

With the importance of people on health, the household reserve of high-end food materials is also increasing. Through researches, the storage temperature of the food material is lower than the vitrification temperature of the food material, the property of the food material is relatively stable, and the quality guarantee period is greatly prolonged. Wherein the glass transition temperature of the food material is mostly concentrated at-80 ℃ to-30 ℃.

The existing domestic refrigerators are refrigerated by adopting a vapor compression mode, and refrigerators adopting semiconductor, magnetic refrigeration and other modes are developed in recent years, but the temperature in the refrigerator is difficult to reach below-30 ℃ due to the limitation of refrigeration efficiency. The Stirling refrigerating system is adopted for refrigerating in the fields of aerospace, medical treatment and the like, and the refrigerating temperature of the Stirling refrigerating system can be lower than minus 200 ℃. Similar to a compressor, however, stirling refrigeration systems produce vibratory noise when operated.

Disclosure of Invention

It is an object of a first aspect of the present invention to overcome at least one of the drawbacks of the prior art and to provide a control method for a refrigeration chiller.

A further object of the first aspect of the invention is to reduce vibration noise.

It is a further object of the first aspect of the present invention to improve the refrigeration efficiency.

It is an object of a first aspect of the present invention to provide a refrigeration and freezer.

According to a first aspect of the present invention there is provided a control method for a refrigeration and freezing apparatus comprising a cabinet defining at least one storage compartment, a vapour compression refrigeration system for cooling at least one of the storage compartments and a stirling refrigeration system for cooling at least one of the storage compartments, the control method comprising:

judging whether the condition that the vapor compression refrigeration system and the Stirling refrigeration system are simultaneously switched from a closed state to an open state is met;

if yes, starting the Stirling refrigerating system, controlling the Stirling refrigerator to rise to target power from preset initial power at preset first time intervals at preset cooling step length, and starting the vapor compression refrigerating system and the Stirling refrigerating system to supply cooling together after the power of the Stirling refrigerator reaches the target power.

Optionally, the at least one storage compartment comprises a cryogenic compartment and a common cold compartment, the vapor compression refrigeration system is configured to cool the cryogenic compartment and the common cold compartment, and the stirling refrigeration system is configured to cool the cryogenic compartment, wherein the control method further comprises:

Judging whether the condition for cooling the common cooling chamber is met or not;

if yes, when judging that the condition that the vapor compression refrigeration system and the Stirling refrigeration system are simultaneously switched from the off state to the on state is met, starting the vapor compression refrigeration system to cool the common cooling compartment, and starting the Stirling refrigeration system to cool together with the vapor compression refrigeration system after a preset time;

and if not, executing the step of starting the Stirling refrigerating system and controlling the Stirling refrigerating machine to rise to the target power from the preset initial power at each preset first time interval by a preset cooling step when judging that the condition that the vapor compression refrigerating system and the Stirling refrigerating system are simultaneously switched from the off state to the on state is met.

Optionally, the at least one storage compartment comprises a cryogenic compartment, and the stirling refrigeration system is configured to provide cooling to the cryogenic compartment, wherein the control method further comprises:

the target power is determined based on a difference between the compartment temperature of the cryogenic compartment and a set cryogenic temperature and an ambient temperature surrounding the refrigeration chiller.

Optionally, the step of cooling the vapor compression refrigeration system together with the stirling refrigeration system after the power of the stirling refrigerator reaches the target power includes:

and starting the vapor compression refrigeration system, and controlling the compressor of the vapor compression refrigeration system to rise to the target rotating speed from the preset initial rotating speed at preset second time intervals at preset rotating speed step steps.

and when the vapor compression refrigeration system supplies cold for the cryogenic compartment, determining the target rotating speed according to the set cryogenic temperature, the set common cooling temperature and the ambient temperature around the refrigeration and freezing device.

Optionally, the at least one storage compartment includes a cryogenic compartment and a common cold compartment, the vapor compression refrigeration system is configured to cool the cryogenic compartment and the common cold compartment, and the stirling refrigeration system is configured to cool the cryogenic compartment, wherein in a quick-freeze mode of the cryogenic compartment, the control method further comprises:

When the room temperature of the cryogenic room is greater than or equal to a preset switching temperature and greater than or equal to a set cryogenic temperature, controlling the vapor compression refrigeration system and the Stirling refrigeration system to supply cold to the cryogenic room; and

and when the room temperature of the cryogenic room is smaller than a preset switching temperature and is larger than or equal to a set cryogenic temperature, controlling the Stirling refrigerating system to supply cold to the cryogenic room, and stopping the vapor compression refrigerating system from supplying cold to the cryogenic room.

when the room temperature of the cryogenic room is larger than or equal to a set cryogenic temperature and the set cryogenic temperature is larger than or equal to a preset switching temperature, controlling the vapor compression refrigeration system and the Stirling refrigeration system to supply cold to the cryogenic room; and

when the room temperature of the cryogenic room is larger than or equal to a set cryogenic temperature and the set cryogenic temperature is smaller than a preset switching temperature, controlling the vapor compression refrigeration system and the Stirling refrigeration system to cool the cryogenic room in a preset time in a first refrigeration period, and controlling the Stirling refrigeration system to cool the cryogenic room only after the preset time; in other refrigeration cycles, the Stirling refrigeration system is controlled to provide cooling to the cryogenic compartment and the vapor compression refrigeration system ceases to provide cooling to the cryogenic compartment.

Optionally, the at least one storage compartment comprises a cryogenic compartment and a common cold compartment, the vapor compression refrigeration system is configured to cool the cryogenic compartment and the common cold compartment, and the stirling refrigeration system is configured to cool the cryogenic compartment, wherein in a normal mode of the cryogenic compartment, the control method further comprises:

and controlling one of the vapor compression refrigeration system and the Stirling refrigeration system to cool the cryogenic compartment when the compartment temperature of the cryogenic compartment is greater than or equal to a set cryogenic temperature.

Optionally, the control method further includes:

if the Stirling refrigerating system is judged to meet the condition of switching from the off state to the on state when the vapor compression refrigerating system supplies cold, the Stirling refrigerating system is immediately started and the Stirling refrigerator is controlled to rise to the target power from the preset initial power at each preset first time interval by a preset cold supply step; and/or

If the vapor compression refrigeration system is judged to meet the condition of switching from the off state to the on state when the Stirling refrigeration system supplies cold, the vapor compression refrigeration system is immediately started and the compressor is controlled to rise to the target rotation speed at a preset rotation speed step length from a preset initial rotation speed at a preset second time interval.

According to a second aspect of the present invention, there is provided a refrigeration and freezing apparatus comprising:

the box body is limited with at least one storage compartment;

a vapor compression refrigeration system for cooling the at least one storage compartment;

a Stirling refrigeration system for cooling the at least one storage compartment; and

a controller configured to perform any of the control methods described above.

When the condition that the vapor compression refrigerating system and the Stirling refrigerating system are simultaneously switched from the off state to the on state is met, the Stirling refrigerating system is started firstly, and then the vapor compression refrigerating system and the Stirling refrigerating system are started to supply cold together after the power of the Stirling refrigerating machine is increased to the target power, so that the vibration noise of a compressor and the Stirling refrigerating machine can be reduced, the maximum power of the whole machine can be reduced, the characteristic of lower cold end temperature of the Stirling refrigerating machine can be utilized, the refrigerating efficiency in the initial stage of refrigeration can be improved, the temperature can be quickly reduced, and the preservation quality of food can be improved.

Further, when the compressor and the Stirling refrigerator are started, the compressor is respectively increased to the target rotating speed from the preset initial rotating speed at the preset second time interval at each preset interval, the Stirling refrigerator is increased to the target power from the preset initial power at the preset first time interval at each preset interval at the preset cooling step, vibration noise generated by the compressor and the Stirling refrigerator is further reduced, and the service lives of the compressor and the Stirling refrigerator are prolonged.

Further, the working speed of the compressor of the vapor compression refrigeration system is determined according to the set cryogenic temperature, the set normal cooling temperature and the ambient temperature around the refrigeration and freezing device, and the working power of the Stirling refrigerator of the Stirling refrigeration system is determined according to the difference between the room temperature of the cryogenic room and the set cryogenic temperature and the ambient temperature around the refrigeration and freezing device, so that the efficiency of refrigerating the normal cooling room is not reduced, the high-efficiency refrigeration of the cryogenic room is realized, the power of the refrigeration and freezing device is reasonably distributed, the unexpected energy waste is avoided, and the user experience is improved.

The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.

Drawings

Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:

FIG. 1 is a schematic cross-sectional view of a refrigerated freezer according to one embodiment of the invention;

FIG. 2 is a schematic partial rear view of the refrigeration and freezer of FIG. 1;

FIG. 3 is a schematic rear view of the refrigeration and freezer of FIG. 2 with the device chamber cover plate removed;

FIG. 4 is a schematic rear view of the refrigeration and freezer of FIG. 3 with one of the half shells, one of the resilient feet, and the insulating cover removed;

FIG. 5 is a schematic partial enlarged view of region A of FIG. 4;

FIG. 6 is a schematic side view of the heat exchanger of FIG. 1;

FIG. 7 is a schematic block diagram of a controller of one embodiment of the present invention;

FIG. 8 is a flow chart of a control method for a refrigeration and chiller according to one embodiment of the present invention;

fig. 9 is a detailed flowchart of a control method for a refrigerating and freezing apparatus according to an embodiment of the present invention;

fig. 10 is a detailed flowchart of a control method for a refrigerating and freezing apparatus according to another embodiment of the present invention;

fig. 11 is a detailed flowchart of a control method for a refrigerating and freezing apparatus according to still another embodiment of the present invention.

Detailed Description

Fig. 1 is a schematic cross-sectional view of a refrigerated chiller 100 according to one embodiment of the present invention; fig. 2 is a schematic partial rear view of the refrigeration and freezer 100 of fig. 1; fig. 3 is a schematic rear view of the refrigeration and freezer 100 of fig. 2 with the cover 118 of the device chamber 117 removed. Referring to fig. 1 through 3, a refrigeration and freezing apparatus 100 may include a cabinet defining at least one storage compartment, at least one door for opening and closing the at least one storage compartment, a stirling refrigeration system for refrigerating the at least one storage compartment and a vapor compression refrigeration system for refrigerating the at least one storage compartment, respectively, and a controller 190 for controlling operation of the vapor compression refrigeration system and the stirling refrigeration system. The refrigerating and freezing apparatus 100 may be a refrigerator, a freezer, or the like.

The case may include an outer case 111, at least one inner container disposed in the outer case 111, and a heat insulation layer 112 disposed between the outer case 111 and the at least one inner container. Wherein, at least one inner container is limited with at least one storing compartment respectively.

In the illustrated embodiment, the cabinet includes a supercooled liner 113, a supercooled liner 114, a supercooled liner 115, and a supercooled liner 116. The vapor compression refrigeration system may be configured to provide cooling to the refrigerated compartment defined by the super-cooled liner 113, the super-cooled compartment defined by the super-cooled liner 114 and the super-cooled liner 115, and the super-cooled compartment defined by the super-cooled liner 116, and the stirling refrigeration system may be configured to provide cooling only to the super-cooled compartment defined by the super-cooled liner 116.

Illustratively, the storage temperature of the refrigerated compartment may be from 0 to +8 ℃; the preservation temperature of the common cooling chamber can be-14 to-24 ℃; the preservation temperature of the cryogenic compartment can cover the preservation temperature of the common cooling compartment and can be between-14 and 80 ℃.

Specifically, the vapor compression refrigeration system may include a compressor 131, a condenser tube, at least one throttling element, and a plurality of evaporator tubes 133. The plurality of evaporating pipes 133 may be disposed in the common cooling liner 113, the common cooling liner 114, and the cryogenic liner 116, respectively. The common cooling liner 115 may be in communication with the common cooling liner 114 via an air duct.

The Stirling refrigeration system may include at least one Stirling refrigerator 120, at least one cold guide 150 thermally coupled to a cold side of the at least one Stirling refrigerator 120, respectively, and at least one heat sink 160 thermally coupled to a hot side of the at least one Stirling refrigerator 120, respectively. In the illustrated embodiment, the number of Stirling coolers 120 is one.

Specifically, each Stirling cooler 120 may include a housing, a cylinder, a piston, and a drive mechanism to drive the movement of the piston. Wherein the housing may be composed of a body 121 and a cylindrical portion 122. The drive mechanism may be disposed within the body 121. The piston may be configured to reciprocate within barrel 122 to form a cold end and a hot end.

The rear bottom of the outer box 111 may also define a device chamber 117. In particular, the Stirling refrigerator 120 may be disposed within the device chamber 117 to facilitate installation and maintenance of the Stirling refrigerator 120 and to improve stability of the Stirling refrigerator 120, and to prevent resonance problems caused by vibrations generated by the Stirling refrigerator 120 being transmitted to the case to some extent.

In some embodiments, the refrigerator-freezer 100 can further include a bottom steel fixedly attached to the outer box 111. A bottom steel may be provided at the bottom of the device chamber 117 for supporting the stirling cooler 120.

In some embodiments, the cold end of Stirling cooler 120 may be disposed above the hot end thereof to facilitate transfer of cold generated at the cold end to the cryogenic compartment.

In some embodiments, the compressor 131 and the condenser 132 may also be disposed in the device chamber 117, so that the structure is compact, the box has a larger storage space, and installation, maintenance and circuit layout of the compressor 131, the condenser 132 and the Stirling refrigerator 120 are facilitated, and production cost is reduced.

In some embodiments, the refrigeration and freezer 100 can also include a thermal cover 175. The heat preservation cover 175 may be configured to separate the cold end and the hot end of the stirling cooler 120 from the inside and the outside thereof, so as to avoid the heat interference of the hot end and the cold end, and make most or all of the cold energy generated by the cold end be transmitted to the cryogenic compartment, thereby improving the refrigeration efficiency of the stirling cooler 120.

In some embodiments, the refrigerating and freezing apparatus 100 may further include a cover 170 covering the outside of the main body 121 of the stirling cooler 120 to prevent the heat generated by the compressor 131 from affecting the working efficiency of the stirling cooler 120 and to shield the vibration noise generated by the stirling cooler 120, thereby reducing the noise transferred to the surrounding environment and improving the user experience.

FIG. 4 is a schematic rear view of the refrigeration and freezer 100 of FIG. 3 with one half shell, one resilient pad, and the thermal cover 175 removed; fig. 5 is a schematic partial enlarged view of the area a in fig. 4. Referring to fig. 4 and 5, the enclosure 170 may be comprised of two half-shells that are mirror symmetrical about a longitudinal central plane of symmetry of the stirling cooler 120. I.e., the two halves of the housing 170 may be mirror symmetric about a plane coplanar with the direction of piston motion of the Stirling cooler 120 to facilitate assembly of the Stirling cooler 120 with the housing 170 and extraction of the cold and hot ends of the Stirling cooler 120.

The cold guide 150 may include a cold end adapter thermally coupled to the cold end of the Stirling refrigerator 120 and a plurality of cold guide tubes thermally coupled to the cold end adapter.

The cold end adapter may be provided with a plurality of tube holes. One end of each heat pipe can be arranged in each pipe hole and is thermally connected with the cold end adapter so as to receive cold energy of the cold end and guide out the cold energy.

Fig. 6 is a schematic side view of the heat exchanger 140 of fig. 1. Referring to fig. 6, the heat exchanger 140 may include a cold guide plate 142 and a refrigerating end adapter 141 thermally connected to the cold guide plate 142.

The cold guide plate 142 may be provided with a plurality of refrigerant holes, and the evaporation tube 133 may extend in a serpentine shape and pass through the plurality of refrigerant holes, so as to increase the contact area between the evaporation tube 133 and the cold guide plate 142.

The cold side adapter 141 may be provided with a plurality of heat pipe holes. The other ends of the plurality of heat pipes may be disposed in the plurality of heat pipe holes and thermally connected to the cooling end adapter 141, respectively, to transfer the received cooling power to the cooling plate 142.

In some embodiments, the refrigeration and freezer 100 can also include at least one electric heating tube 180. Each of the electric heating pipes 180 may be provided to be partially embedded in the cold guide plate 142 to defrost the heat exchanger 140.

In some embodiments, the refrigeration and chiller 100 may further include a cooling fan 134 disposed in the sub-ambient air space to provide more efficient heat exchange between the hot air and the cold air in the sub-ambient air space.

Fig. 7 is a schematic block diagram of a controller 190 according to an embodiment of the present invention. Referring to fig. 7, the controller 190 may include a processing unit 191 and a storage unit 192. The storage unit 192 stores therein a computer program 193 for implementing the control method of the embodiment of the present invention when the computer program 193 is executed by the processing unit 191.

In the first embodiment, the refrigerating and freezing apparatus 100 is provided with the normal mode. In the normal mode, the controller 190 may be configured to control the vapor compression refrigeration system to cool the cryogenic compartment and to control the stirling refrigeration system to stop cooling the cryogenic compartment when the compartment temperature of the cryogenic compartment is greater than or equal to the preset switching temperature and greater than or equal to the set cryogenic temperature; when the temperature of the cryogenic chamber is smaller than the preset switching temperature and larger than or equal to the set cryogenic temperature, the Stirling refrigerating system is controlled to cool the cryogenic chamber, and the vapor compression refrigerating system is controlled to stop cooling the cryogenic chamber.

In the present invention, the set cryogenic temperature is a user input or a default set storage temperature for the cryogenic compartment. The preset switching temperature may be greater than the minimum refrigeration temperature of the vapor compression refrigeration system, e.g., the minimum refrigeration temperature of the vapor compression refrigeration system is 40 ℃, and the switching temperature may be-25 ℃.

The refrigeration and freezing device 100 of the invention can cool the vapor compression refrigeration system to the cryogenic compartment when the compartment temperature is larger than or equal to the preset switching temperature in the normal mode, and can cool the Stirling refrigeration system to the cryogenic compartment when the compartment temperature is smaller than the preset switching temperature, thereby not only improving the refrigeration efficiency of the refrigeration and freezing device 100 to the cryogenic compartment as a whole, but also reducing the energy consumption of the refrigeration and freezing device 100 and prolonging the service life of the Stirling refrigerator 120.

Further, the controller 190 may be configured to determine the operating power of the Stirling cooler 120 based on the difference between the compartment temperature of the cryogenic compartment and the set cryogenic temperature and the ambient temperature surrounding the refrigerated freezer 100. That is, during the cooling process, the operating power of the Stirling refrigerator 120 is re-determined in real time according to the change of the temperature difference, so that energy is saved while the cooling efficiency is ensured.

In the case of the same ambient temperature, the operating power of Stirling refrigerator 120 may be approximately directly related to the difference between the compartment temperature of the cryogenic compartment and the set cryogenic temperature, i.e., the difference between the compartment temperature of the cryogenic compartment minus the set cryogenic temperature.

In the case where the difference between the compartment temperature of the cryogenic compartment and the set cryogenic temperature is the same, the operating power of the Stirling refrigerator 120 may be approximately positively correlated with the ambient temperature.

Table 1 shows the difference between the room temperature minus the set cryogenic temperature of the various cryogenic rooms, and the operating power of the stirling cooler 120 corresponding to the ambient temperature around the various refrigeration chiller 100, in watts (W), temperature difference and ambient temperature in degrees celsius (°c), in accordance with an exemplary embodiment of the present invention.

TABLE 1

The controller 190 may regulate the operating power of the Stirling cooler 120 by regulating the input voltage to the Stirling cooler 120.

Further, the controller 190 may be further configured to determine the operating speed of the compressor 131 according to the set supercooling temperature, and the ambient temperature around the refrigerating and freezing apparatus 100, so as to make the power distribution of the refrigerating and freezing apparatus 100 more reasonable, and to achieve efficient cooling of the supercooling compartment while not reducing the efficiency of cooling the supercooling compartment.

In the invention, the set cooling temperature is set preservation temperature of the cooling chamber by user input or default of the system.

The operating speed of the compressor 131 may be approximately inversely related to the set sub-ambient temperature, with both the set sub-ambient temperature and the set sub-ambient temperature being the same.

In the case where the set sub-ambient temperature and the set sub-ambient temperature are the same, the operating speed of the compressor 131 may be approximately positively correlated with the ambient temperature.

Further, under the condition that the set normal cooling temperature and the environment temperature are the same and the vapor compression refrigeration system supplies cold for the cryogenic compartment, the working rotation speed of the compressor when the set cryogenic temperature is greater than or equal to the preset cryogenic temperature can be greater than or equal to the working rotation speed when the set cryogenic temperature is less than the preset cryogenic temperature, so that the efficiency of supplying cold for the cryogenic compartment is improved.

For example, the preset switching temperature is-25℃and the preset cryogenic temperature is-21 ℃. The working speed of the compressor can be more than or equal to the working speed of the compressor at the set temperature of more than or equal to minus 25 ℃ and less than minus 21 ℃ under the condition that other conditions are the same.

Specifically, table 2 shows the operating speeds of the compressors 131 corresponding to different set supercooling temperatures and different ambient temperatures around the refrigerating and freezing apparatus 100 when the compressor 131 cools the supercooling compartment and the set supercooling temperature is equal to or higher than the preset supercooling temperature in the normal mode according to an exemplary embodiment of the present invention, wherein the operating speed of the compressors 131 is expressed in revolutions per minute (rpm), and the set supercooling temperature and the ambient temperature are expressed in degrees celsius (°c).

TABLE 2

Table 3 shows the operating speeds of the compressors 131 corresponding to different set supercooling temperatures and different ambient temperatures around the refrigerating and freezing apparatus 100 when the compressor 131 cools the supercooling compartment and the set supercooling temperature is less than the preset supercooling temperature in the normal mode according to an exemplary embodiment of the present invention, wherein the operating speed of the compressor 131 is expressed in revolutions per minute (rpm), and the set supercooling temperature and the ambient temperature are expressed in degrees celsius (°c).

TABLE 3 Table 3

Further, in the case where the set supercooling temperature, and the ambient temperature are the same, the operating rotation speed of the compressor 131 when the stirling refrigerating system supplies cold to the supercooling compartment and the vapor compression refrigerating system supplies cold to the supercooling compartment may be equal to or less than the operating rotation speed of the compressor 131 when the vapor compression refrigerating system supplies cold to the supercooling compartment. That is, the operating speed of the compressor 131 when cooling only the sub-cooling compartment or simultaneously cooling at least one of the sub-cooling compartment and the other compartments (the refrigerating compartment and the general cooling compartment) is equal to or greater than the operating speed when stopping cooling the sub-cooling compartment and cooling at least one of the other compartments, so that the distribution of power is more reasonable.

Table 4 shows the operating speeds of the compressors 131 corresponding to different cooling temperatures and different ambient temperatures around the refrigeration and freezer 100 when the compressors 131 are only used for cooling at least one other storage compartment in the normal mode according to an exemplary embodiment of the present invention, wherein the operating speeds of the compressors 131 are expressed in revolutions per minute (rpm) and the cooling temperatures and the ambient temperatures are set in degrees celsius (°c).

TABLE 4 Table 4

Further, in the normal mode, the controller 190 may be configured to determine the duty cycle (the ratio of the operating speed to the rated speed) of the cooling fan 134 according to the set cryogenic temperature when the vapor compression refrigeration system is cooling the cryogenic compartment, in which case the duty cycle may be less than 100% to enable the hot air and the cold air in the cryogenic compartment to exchange heat more sufficiently, improve the refrigeration efficiency, avoid undesirable energy waste, and extend the service life of the cooling fan. Wherein the duty cycle of the refrigeration fan 134 may be inversely proportional to the set cryogenic temperature.

Specifically, table 5 shows the duty ratios of the cooling fans 134 corresponding to different set cryogenic temperatures when the compressor 131 supplies cold to the cryogenic compartment in the normal mode according to an exemplary embodiment of the present invention, wherein the set cryogenic temperatures are set in degrees celsius (°c).

TABLE 5

Further, in the normal mode, the controller 190 may be configured to control the refrigeration fan 134 to operate at a duty cycle of 100% when the Stirling refrigeration system is providing cooling to the cryogenic compartment to further increase the refrigeration efficiency and avoid too much concentrated cooling to reduce the useful life of the refrigeration fan 134.

Further, the refrigerating and freezing apparatus 100 may be further provided with a quick-freezing mode. The quick freezing mode may be operated when a quick freezing mode start instruction input by a user is received, or operated when the refrigerating and freezing apparatus 100 is first powered on (i.e., the temperature of the compartment from the first time the refrigerating and freezing apparatus 100 is powered on to the temperature of the cryogenic compartment is less than a set cryogenic temperature) even when the previous two times of power on, or operated immediately after defrosting of the cryogenic compartment is completed, so as to improve the preservation quality of foods in the cryogenic compartment.

In the quick-freeze mode, the controller 190 may be configured to control the vapor compression refrigeration system and the stirling refrigeration system to cool the cryogenic compartment when the compartment temperature of the cryogenic compartment is greater than or equal to a preset switching temperature and greater than or equal to a set cryogenic temperature; when the temperature of the cryogenic chamber is smaller than the preset switching temperature and is larger than or equal to the set cryogenic temperature, the Stirling refrigerating system is controlled to cool the cryogenic chamber, and the vapor compression refrigerating system is controlled to stop cooling the cryogenic chamber, so that the cooling efficiency of the cryogenic chamber is further improved.

Further, in the case that the normal cooling temperature and the ambient temperature are both set to be the same, the working rotation speed of the compressor 131 when cooling the cryogenic compartment in the quick freezing mode may be greater than or equal to the working rotation speed of the compressor when cooling the cryogenic compartment in the normal mode, so as to further improve the refrigeration efficiency while saving energy.

Table 6 shows the operating speeds of the compressors 131 corresponding to different set cooling temperatures and different ambient temperatures around the refrigerating and freezing apparatus 100 when the compressors 131 are used for cooling the deep-freezing compartment in the quick-freezing mode according to an exemplary embodiment of the present invention, wherein the operating speeds of the compressors 131 are expressed in revolutions per minute (rpm), and the set cooling temperatures and the ambient temperatures are expressed in degrees celsius (deg.c).

TABLE 6

Further, in the quick-freeze mode, the controller 190 may be configured to control the cooling fan 134 to operate at a 100% duty cycle to further increase the cooling efficiency, avoiding too concentrated cooling capacity to reduce the useful life of the cooling fan 134.

Further, in the normal mode and the quick-freeze mode, the controller 190 may be configured to control the vapor compression refrigeration system and the Stirling refrigeration system to stop cooling the cryogenic compartment when the compartment temperature is less than the set cryogenic temperature.

Further, the refrigerating and freezing apparatus 100 may further include a detecting means for detecting a compartment temperature of the deep-cooling compartment.

In the normal mode and the quick-freezing mode, the controller 190 may be configured to determine whether the compartment temperature is equal to or higher than a set cryogenic temperature, as the compartment temperature of the cryogenic compartment, a difference of the detected temperature detected by the detecting means minus a preset temperature fluctuation value; when judging whether the room temperature is smaller than the set cryogenic temperature, taking the sum of the detected temperature detected by the detection device and the preset temperature fluctuation value as the room temperature of the cryogenic room, so as to avoid frequent on-off of the part of the vapor compression refrigeration system for cooling the cryogenic room or frequent on-off of the Stirling refrigeration system.

In the present invention, the temperature fluctuation value may be any value of 1 to 3 ℃, for example, 1 ℃, 2 ℃, or 3 ℃.

In the normal mode and the quick-freezing mode, the controller 190 may be further configured to determine whether the compartment temperature is equal to or higher than a preset switching temperature in the case where the vapor compression refrigeration system supplies cold to the cryogenic compartment, and to use a difference obtained by subtracting a preset temperature fluctuation value from the detected temperature detected by the detection device as the compartment temperature of the cryogenic compartment; when the Stirling refrigerating system supplies cold for the cryogenic compartment, judging whether the compartment temperature is smaller than the preset switching temperature or not, taking the sum of the detected temperature detected by the detecting device and the preset temperature fluctuation value as the compartment temperature of the cryogenic compartment so as to avoid frequent switching between the vapor compression refrigerating system and the Stirling refrigerating system.

In the second embodiment, which is different from the first embodiment, in the normal mode, the controller 190 may be configured to control the vapor compression refrigeration system to cool the cryogenic compartment for a preset time when the compartment temperature of the cryogenic compartment is equal to or greater than a set cryogenic temperature, and the stirling refrigeration system stops cooling the cryogenic compartment; after the preset time, if the room temperature is still greater than or equal to the set cryogenic temperature, controlling the Stirling refrigerating system to cool the cryogenic room, and stopping the vapor compression refrigerating system from cooling the cryogenic room.

The refrigerating and freezing device 100 of the present invention switches the refrigerating systems by time so that both refrigerating systems are in the optimal working state, thereby not only improving the refrigerating efficiency of the refrigerating and freezing device 100 to the deep cooling compartment as a whole, but also prolonging the service lives of the compressor 131 and the stirling refrigerator 120.

Further, the controller 190 may be configured to control the vapor compression refrigeration system to cool the cryogenic compartment for a preset time during each refrigeration cycle when the set cryogenic temperature is greater than or equal to the preset switching temperature, and to restart the Stirling refrigeration system if the compartment temperature of the cryogenic compartment is still greater than or equal to the set cryogenic temperature; when the set cryogenic temperature is smaller than the preset switching temperature, the vapor compression refrigeration system is controlled to cool the cryogenic compartment for a preset time only in the first refrigeration cycle, and if the compartment temperature of the cryogenic compartment is still larger than or equal to the set cryogenic temperature, the Stirling refrigeration system is restarted, so that the refrigeration efficiency is improved, and meanwhile, the use requirement of a user is met.

In the present invention, the refrigeration cycle refers to a cycle from the vapor compression refrigeration system and/or the stirling refrigeration system cooling the cryogenic compartment to the vapor compression refrigeration system and the stirling refrigeration system stopping cooling the cryogenic compartment, i.e., a cycle from cooling the cryogenic compartment to completing the refrigeration. The first refrigeration cycle when the set cryogenic temperature is less than the preset switching temperature refers to the first refrigeration cycle when the set cryogenic temperature is adjusted from greater than or equal to the preset switching temperature to less than the preset switching temperature.

The controller 190 may be configured to control the vapor compression refrigeration system to stop cooling the cryogenic compartment during other refrigeration cycles than the first refrigeration cycle, in the event that the set cryogenic temperature is less than the preset switching temperature, to cause the compartment temperature of the cryogenic compartment to quickly drop to the set cryogenic temperature.

Further, the controller 190 may also be configured to determine the aforementioned preset time (i.e., the operating time of the compressor 131) based on the set cryogenic temperature and the ambient temperature surrounding the refrigeration chiller 100 to avoid undesirable energy waste.

In the case where the set cryogenic temperature is the same, the preset time may be positively correlated with the ambient temperature.

In the case of the same ambient temperature, the preset time may be inversely related to the set cryogenic temperature. That is, the lower the set cryogenic temperature, the longer the preset time.

Table 7 shows the operation time of the compressor 131 corresponding to different set cryogenic temperatures and different ambient temperatures around the refrigeration and freezing apparatus 100 when the compressor 131 provides the cooling capacity to the cryogenic compartment and the set cryogenic temperature is equal to or higher than the preset switching temperature in the normal mode according to an exemplary embodiment of the present invention, wherein the operation time of the compressor 131 is in minutes (min) and the set cryogenic temperature and the ambient temperature are in degrees celsius (deg.c).

TABLE 7

Further, in the case where the set cryogenic temperature and the ambient temperature are the same, the preset time when the set cryogenic temperature is less than the preset switching temperature may be greater than or equal to the preset time when the set cryogenic temperature is greater than or equal to the preset switching temperature, to extend the service life of the stirling cooler 120.

When the set cryogenic temperature is greater than or equal to the set cryogenic temperature, the preset time of the first refrigeration cycle may be greater than the preset time of the other refrigeration cycles to avoid undesirable energy waste and extend the life of the compressor 131.

Further, in the quick-freeze mode, the controller 190 may be configured to control the vapor compression refrigeration system and the stirling refrigeration system to provide refrigeration to the cryogenic compartment during each refrigeration cycle when the set cryogenic temperature is greater than or equal to the preset switching temperature; when the set cryogenic temperature is smaller than the preset switching temperature, the vapor compression refrigeration system and the Stirling refrigeration system are controlled to cool the cryogenic compartment for a preset time only in the first refrigeration cycle, and if the compartment temperature is still greater than or equal to the set cryogenic temperature after the preset time, the Stirling refrigeration system is controlled to cool the cryogenic compartment, and the vapor compression refrigeration system stops cooling the cryogenic compartment, so that the cooling efficiency of the cryogenic compartment is further improved.

The controller 190 may be configured to control the Stirling refrigeration system to cool the cryogenic compartment during other refrigeration cycles than the first refrigeration cycle when the set cryogenic temperature is less than the preset switching temperature, and the vapor compression refrigeration system to stop cooling the cryogenic compartment.

In the quick-freezing mode, the preset time when the set cryogenic temperature is less than the preset switching temperature may be greater than or equal to the preset time when the set cryogenic temperature is greater than or equal to the preset switching temperature in the quick-freezing mode. In the quick-freezing mode, the preset time when the set cryogenic temperature is equal to or greater than the preset switching temperature may be equal to or greater than the preset time when the set cryogenic temperature is less than the preset switching temperature in the normal mode.

In a third embodiment, which differs from the second embodiment in that, in the normal mode, the controller 190 may be configured to control the vapor compression refrigeration system and the stirling refrigeration system to alternately cool the cryogenic compartments when the compartment temperature of the cryogenic compartments is equal to or greater than a set cryogenic temperature. In each refrigeration cycle of alternate refrigeration, the stirling refrigeration system can initially cool the cryogenic compartment, so that the refrigeration efficiency of the refrigeration chiller 100 to the cryogenic compartment is improved as a whole and the energy consumption is reduced while both systems are in an optimal operating state.

Further, the controller 190 may be configured to control the vapor compression refrigeration system to alternately cool with the Stirling refrigeration system during each refrigeration cycle when the set cryogenic temperature is greater than or equal to the preset switching temperature; when the set cryogenic temperature is smaller than the preset switching temperature, the vapor compression refrigeration system and the Stirling refrigeration system are controlled to alternately refrigerate only in the first refrigeration cycle, so that the refrigeration efficiency is improved, and meanwhile the use requirement of a user is met.

Further, the controller 190 may be configured to determine the cool down time for each Stirling refrigeration system to cool down the cryogenic compartments and the cool down time for each vapor compression refrigeration system to cool down the cryogenic compartments in each alternating refrigeration cycle based on the set cryogenic temperature and the ambient temperature surrounding the refrigerated chiller 100 to avoid undesirable energy waste. The cooling time for each stirling cooler system cooling the cryogenic compartment and the cooling time for each vapor compression cooler system cooling the cryogenic compartment may be determined according to a table similar to table 7.

The time for cooling each stirling refrigeration system to cool the cryogenic compartment and the time for cooling each vapor compression refrigeration system to cool the cryogenic compartment in each alternating refrigeration cycle may be approximately inversely proportional to the set cryogenic temperature, with the ambient temperature being the same.

The time for cooling each stirling cooler and the time for cooling each vapor compression cooler for the cryogenic compartment in each alternating cool down cycle may be approximately proportional to the ambient temperature with the same set cryogenic temperature.

Further, in each alternate refrigeration cycle, the cooling time of the refrigeration system that cools the back-side cryogenic compartment may be greater than or equal to the cooling time of the refrigeration system that cools the front-side cryogenic compartment to avoid frequent switching of the two systems while ensuring the performance of the two refrigeration systems.

For refrigerators in which the lowest refrigeration temperature of the vapor compression refrigeration system is less than the lowest refrigeration temperature of the Stirling refrigeration system, the cooling times of the two refrigeration systems may be set such that the Stirling refrigeration system cools to a compartment temperature less than the set cryogenic temperature when the set cryogenic temperature is less than the lowest refrigeration temperature of the vapor compression refrigeration system.

In particular, the controller 190 may be configured to turn on the stirling refrigeration system and control the stirling refrigerator 120 to rise from a preset initial power to a target power at a preset first time interval every interval when it is determined that conditions for simultaneously switching the vapor compression refrigeration system and the stirling refrigeration system from the off state to the on state are satisfied, and to turn on the vapor compression refrigeration system and the stirling refrigeration system to supply cold together after the power of the stirling refrigerator 120 reaches the target power, so as to reduce vibration noise of the compressor 131 and the stirling refrigerator 120, reduce the maximum power of the whole machine, and further to improve the refrigeration efficiency at the initial stage of refrigeration by utilizing the characteristic that the cold end temperature of the stirling refrigerator 120 is lower, so that the temperature is rapidly reduced, and the preservation quality of food is improved.

The target power is the target operating power of the Stirling refrigerator 120, and may be determined by the method of determining the operating power of the Stirling refrigerator 120 of any of the embodiments described above.

In some exemplary embodiments, the preset initial power may be 5-10W, the first time interval may be 2-5 min, and the preset power step may be 4-6W.

The condition for switching the vapor compression refrigeration system and the stirling refrigeration system from the off state to the on state at the same time may be a condition for initially powering on the refrigeration chiller 100, for simultaneously cooling the vapor compression refrigeration system and the stirling refrigeration system to the cryogenic compartment when the vapor compression refrigeration system stops cooling the refrigeration compartment and the cryogenic compartment, and for cooling the vapor compression refrigeration system to the cryogenic compartment and for cooling the stirling refrigeration system to the cryogenic compartment.

Upon turning on the vapor compression refrigeration system (including in the case where it is determined that the condition that the vapor compression refrigeration system and the stirling refrigeration system are simultaneously switched from the off state to the on state is satisfied, and during operation of the stirling refrigerator 120), the controller 190 may be configured to control the compressor 131 to rise from the preset initial rotational speed to the target rotational speed at preset rotational speed steps per a preset second time interval to further reduce vibration noise. The target rotation speed is the target working rotation speed of the compressor 131, and may be determined by the method for determining the working rotation speed of the compressor 131 according to any of the foregoing embodiments.

In some exemplary embodiments, the preset initial rotational speed may be 1000 to 1500rpm, the second time interval may be 2 to 5 minutes, and the preset rotational speed step may be 300 to 600rpm.

During operation of the compressor 131, if the Stirling refrigeration system is turned on, the controller 190 may be configured to control the Stirling refrigerator 120 to rise from a preset initial power to a target power at preset cooling steps per a preset first time interval to further reduce vibration noise.

Further, in the case that it is determined that the condition that the vapor compression refrigeration system and the stirling refrigeration system are simultaneously switched from the off state to the on state is satisfied, if the condition that the cooling condition for the common cooling compartment is simultaneously satisfied, the controller 190 may be configured to turn on the vapor compression refrigeration system to cool the common cooling compartment, and after a preset time, turn on the stirling refrigeration system to cool together with the vapor compression refrigeration system, so as to cool the refrigeration compartment, the common cooling compartment, and the cryogenic compartment simultaneously on the basis of reducing vibration noise, thereby rapidly decreasing the temperatures of the three compartments and improving the preservation quality of the food material as a whole. In this embodiment, the preset time may be 20 to 40 minutes.

In the case where it is determined that the condition for simultaneously switching the vapor compression refrigeration system and the stirling refrigeration system from the off state to the on state is satisfied, if the cooling condition for the common cooling compartment is not satisfied at the same time, the controller 190 may be configured to first turn on the stirling refrigeration system and then turn on the vapor compression refrigeration system as described above.

Fig. 8 is a flowchart of a control method for the refrigerating and freezing apparatus 100 according to an embodiment of the present invention. Referring to fig. 8 (in the present invention, "Y" in the drawings indicates "yes" and "N" indicates "no"), the control method for the refrigerating and freezing apparatus 100, which is performed by the controller 190 of any of the above-described embodiments, of the present invention may include the steps of:

step S802: when the condition that the vapor compression refrigeration system and the Stirling refrigeration system are simultaneously switched from the off state to the on state is satisfied, whether the condition for cooling the common cooling chamber is also satisfied or not is satisfied. If yes, go to step S804; if not, go to step S806.

Step S804: the vapor compression refrigerating system is started to cool the common cooling chamber, and after the preset time, the Stirling refrigerating system is started to cool the common cooling chamber and the deep cooling chamber together with the vapor compression refrigerating system, so that the temperatures of the three chambers are quickly reduced on the basis of reducing vibration noise, and the preservation quality of food materials is improved as a whole.

Step S806: starting a Stirling refrigerating system, controlling a Stirling refrigerator to rise to target power at preset cooling step length from preset initial power at preset first time intervals, starting a compressor refrigerating system to cool together with the Stirling refrigerating system after the power of the Stirling refrigerator reaches the target power so as to reduce vibration noise, improving the refrigerating efficiency at the initial stage of cooling to a cryogenic compartment by utilizing the characteristic that the temperature of the cold end of the Stirling refrigerator 120 is lower, enabling the temperature to be rapidly reduced, and improving the preservation quality of food.

In other embodiments, a control method for the refrigerator-freezer 100 may include: judging whether the condition that the vapor compression refrigeration system and the Stirling refrigeration system are simultaneously switched from the off state to the on state is met; if yes, step S806 is performed to extend the service life of the compressor 131.

The step of turning on the vapor compression refrigeration system may include (including in the case where it is determined that conditions for simultaneously switching the vapor compression refrigeration system and the stirling refrigeration system from the off state to the on state are satisfied, and during operation of the stirling refrigerator 120): the compressor 131 is controlled to rise to the target rotation speed in a preset rotation speed step from a preset initial rotation speed every a preset second time interval to further reduce vibration noise.

The target rotation speed is the target working rotation speed of the compressor 131, and can be determined according to the set cryogenic temperature, the set general cooling temperature and the ambient temperature around the refrigerating and freezing device 100, so that the power distribution of the refrigerating and freezing device 100 is more reasonable, and the efficient refrigeration of the cryogenic compartment is realized while the efficiency of cooling the general cooling compartment is not reduced.

During operation of the compressor 131, the step of starting the Stirling refrigeration system may also include: the Stirling refrigerator 120 is controlled to rise from a preset initial power to a target power at preset cooling steps per a preset first time interval to further reduce vibration noise.

The target power is the target operating power of the Stirling refrigerator 120, and can be determined according to the difference between the compartment temperature of the sub-zero compartment and the set sub-zero temperature and the ambient temperature around the refrigerating and freezing apparatus 100, so as to save energy while ensuring the refrigerating efficiency.

The control method for the refrigerating and freezing apparatus 100 of the present invention may further include controlling one of the vapor compression refrigeration system and the stirling refrigeration system to cool the cryogenic compartment in the normal mode based on the control method shown in fig. 8, the vapor compression refrigeration system and the stirling refrigeration system not simultaneously operating, so as to reduce energy consumption and extend the service lives of the compressor 131 and the stirling refrigerator 120 while improving refrigeration efficiency.

The control method for the refrigerating and freezing apparatus 100 of the present invention may further comprise controlling the vapor compression refrigeration system and the stirling refrigeration system to simultaneously cool the cryogenic compartment in the cryogenic mode based on the control method shown in fig. 8, so as to further improve the refrigerating efficiency.

In particular, fig. 9 is a detailed flowchart of a control method for the refrigerating and freezing apparatus 100 according to one embodiment of the present invention. Referring to fig. 9, the control method for the refrigerating and freezing apparatus 100 of the present invention may specifically include the steps of:

Step S902: whether a quick-freezing mode starting instruction is received or whether the refrigerating and freezing device 100 is electrified for the first time or whether defrosting of the deep-cooling compartment is finished is judged. If yes, executing step S904, and starting to run a quick-freezing mode; if not, it is determined that the normal mode start command is received, step S912 is executed, and the normal mode starts to be operated.

Step S904: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature. If yes, go to step S906; if not, go to step S920. In some embodiments, in each quick-freezing mode operation period, when step S904 is performed for the first time, in order to determine whether the cryogenic compartment needs to be refrigerated, the temperature of the cryogenic compartment may be the difference obtained by subtracting the preset temperature fluctuation value from the detected temperature detected by the detecting device; and when the step S904 is operated again, in order to judge whether the chamber temperature of the cryogenic chamber is smaller than the set cryogenic temperature, namely, judge whether the refrigeration of the cryogenic chamber is finished, at this moment, the temperature of the cryogenic chamber can be the sum of the detected temperature detected by the detection device and a preset temperature fluctuation value, so as to avoid frequent on-off of a part of the vapor compression refrigeration system for supplying cold to the cryogenic chamber or frequent on-off of the Stirling refrigeration system.

Step S906: judging whether the room temperature of the cryogenic room is more than or equal to a preset switching temperature. If yes, go to step S908; if not, go to step S910. In some embodiments, during each quick-freeze mode operation cycle, the first time step S906 is operated, the temperature of the cryogenic compartment may be the detected temperature detected by the detection device at that time.

Step S908: the vapor compression refrigeration system and the Stirling refrigeration system are controlled to provide cooling for the cryogenic compartment. And returns to step S902. In some embodiments, when step S906 is performed after step S908, the sub-zero compartment temperature may be the difference between the detected temperature detected by the detection device minus a preset temperature fluctuation value to avoid frequent switching between the vapor compression refrigeration system and the stirling refrigeration system.

Step S910: the Stirling refrigerating system is controlled to cool the cryogenic compartment, and the vapor compression refrigerating system stops cooling the cryogenic compartment. And returns to step S902. In some embodiments, when step S906 is performed after step S910, the sub-zero compartment temperature may be the sum of the detected temperature detected by the detection device and a preset temperature fluctuation value to avoid frequent switching between the vapor compression refrigeration system and the stirling refrigeration system.

Step S912: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature. If yes, go to step S914; if not, go to step S920. In some embodiments, in each normal mode operation period, when step S912 is performed for the first time, in order to determine whether the cryogenic compartment needs to be refrigerated, the temperature of the cryogenic compartment may be the difference obtained by subtracting the preset temperature fluctuation value from the detected temperature detected by the detecting device; when the step S912 is performed again, in order to determine whether the chamber temperature of the cryogenic chamber is less than the set cryogenic temperature, that is, whether the refrigeration of the cryogenic chamber is completed, the temperature of the cryogenic chamber may be the sum of the detected temperature detected by the detecting device and the preset temperature fluctuation value, so as to avoid frequent on-off of the portion of the vapor compression refrigeration system supplying the cold to the cryogenic chamber or frequent on-off of the stirling refrigeration system.

Step S914: judging whether the room temperature of the cryogenic room is more than or equal to a preset switching temperature. If yes, go to step S916; if not, go to step S918. In some embodiments, during each normal mode operation period, the first time step S914 is performed, the temperature of the cryogenic compartment may be the detected temperature detected by the detection means at that time.

Step S916: the vapor compression refrigeration system is controlled to cool the cryogenic compartment, and the Stirling refrigeration system stops cooling the cryogenic compartment. And returns to step S902. In some embodiments, when step S914 is performed after step S916, the sub-zero chamber temperature may be the difference between the detected temperature detected by the detection device minus a preset temperature fluctuation value to avoid frequent switching between the vapor compression refrigeration system and the stirling refrigeration system.

Step S918: the Stirling refrigerating system is controlled to cool the cryogenic compartment, and the vapor compression refrigerating system stops cooling the cryogenic compartment. And returns to step S902.

Step S920: the vapor compression refrigeration system and the Stirling refrigeration system are controlled to stop cooling the cryogenic compartment. And returns to step S902.

Fig. 10 is a detailed flowchart of a control method for the refrigerating and freezing apparatus 100 according to another embodiment of the present invention. Referring to fig. 10, the control method for the refrigerating and freezing apparatus 100 of the present invention may specifically include the steps of:

step S1002: whether a quick-freezing mode starting instruction is received or whether the refrigerating and freezing device 100 is electrified for the first time or whether defrosting of the deep-cooling compartment is finished is judged. If yes, executing step S1004, and starting to operate the quick-freezing mode; if not, it is determined that the normal mode start command is received, step S1012 is executed, and the normal mode starts to be operated.

Step S1004: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature. If yes, go to step S1006; if not, go to step S1020.

Step S1006: judging whether the set cryogenic temperature is greater than or equal to a preset switching temperature. If yes, go to step S1008; if not, go to step S1010.

Step S1008: the vapor compression refrigeration system and the Stirling refrigeration system are controlled to cool the cryogenic compartment so as to improve refrigeration efficiency. And returns to step S1002.

Step S1010: in the first refrigeration cycle, the vapor compression refrigeration system and the Stirling refrigeration system cool the cryogenic compartment for a preset time, and the vapor compression refrigeration system stops cooling the cryogenic compartment beyond the preset time, and the Stirling refrigeration system cools the cryogenic compartment; in other refrigeration cycles, only the Stirling refrigeration system provides cooling to the cryogenic compartment. And returns to step S1002.

Step S1012: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature. If yes, go to step S1014; if not, go to step S1020.

Step S1014: judging whether the set cryogenic temperature is greater than or equal to a preset switching temperature. If yes, go to step S1016; if not, go to step S1018.

Step S1016: the vapor compression refrigeration system cools the cryogenic compartment for a preset time beyond which the vapor compression refrigeration system stops cooling the cryogenic compartment and the Stirling refrigeration system cools the cryogenic compartment. And returns to step S1002.

Step S1018: in the first refrigeration cycle, the vapor compression refrigeration system cools the cryogenic compartment for a preset time, and the vapor compression refrigeration system stops cooling the cryogenic compartment beyond the preset time, and the Stirling refrigeration system cools the cryogenic compartment; in other refrigeration cycles, only the Stirling refrigeration system provides cooling to the cryogenic compartment. And returns to step S1002.

Step S1020: the vapor compression refrigeration system and the Stirling refrigeration system are controlled to stop cooling the cryogenic compartment. And returns to step S1002.

Fig. 11 is a detailed flowchart of a control method for a refrigerating and freezing apparatus according to still another embodiment of the present invention. Referring to fig. 11, the control method for the refrigerating and freezing apparatus 100 of the present invention may specifically include the steps of:

step S1102: whether a quick-freezing mode starting instruction is received or whether the refrigerating and freezing device 100 is electrified for the first time or whether defrosting of the deep-cooling compartment is finished is judged. If yes, executing step S1104 to start the quick-freezing mode; if not, it is determined that the normal mode start command is received, step S1112 is executed, and the normal mode starts to be operated.

Step S1104: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature. If yes, go to step S1106; if not, go to step S1120.

Step S1106: judging whether the set cryogenic temperature is greater than or equal to a preset switching temperature. If yes, go to step S1108; if not, go to step S1110.

Step S1108: the vapor compression refrigeration system and the Stirling refrigeration system are controlled to cool the cryogenic compartment so as to improve refrigeration efficiency. And returns to step S1102.

Step S1110: in the first refrigeration cycle, the vapor compression refrigeration system and the Stirling refrigeration system cool the cryogenic compartment for a preset time, and the vapor compression refrigeration system stops cooling the cryogenic compartment beyond the preset time, and the Stirling refrigeration system cools the cryogenic compartment; in other refrigeration cycles, only the Stirling refrigeration system provides cooling to the cryogenic compartment. And returns to step S1102.

Step S1112: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature. If yes, go to step S1114; if not, go to step S1120.

Step S1114: judging whether the set cryogenic temperature is greater than or equal to a preset switching temperature. If yes, go to step S1116; if not, go to step S1118.

Step S1116: and controlling the vapor compression refrigeration system and the Stirling refrigeration system to alternately refrigerate. And returns to step S1102.

Step S1118: in a first refrigeration cycle, a vapor compression refrigeration system alternately cools with the Stirling refrigeration system; in other refrigeration cycles, only the Stirling refrigeration system provides cooling to the cryogenic compartment. And returns to step S1102.

Step S1120: the vapor compression refrigeration system and the Stirling refrigeration system are controlled to stop cooling the cryogenic compartment. And returns to step S1102.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims

1. A control method for a refrigeration chiller including a cabinet defining at least one storage compartment, a vapor compression refrigeration system for cooling at least one of the storage compartments, and a stirling refrigeration system for cooling at least one of the storage compartments, the control method comprising:

2. The control method of claim 1, the at least one storage compartment comprising a cryogenic compartment and a common cold compartment, the vapor compression refrigeration system configured to cool the cryogenic compartment and the common cold compartment, the stirling refrigeration system configured to cool the cryogenic compartment, the control method further comprising:

3. The control method of claim 1, wherein the at least one storage compartment comprises a cryogenic compartment, the stirling refrigeration system configured to provide cooling to the cryogenic compartment, the control method further comprising:

4. The control method of claim 1, wherein the step of cooling the vapor compression refrigeration system together with the stirling refrigeration system after the power of the stirling cooler reaches the target power comprises:

5. The control method of claim 4, said at least one storage compartment comprising a cryogenic compartment and a common cold compartment, said vapor compression refrigeration system configured to cool said cryogenic compartment and said common cold compartment, said stirling refrigeration system configured to cool said cryogenic compartment, said control method further comprising:

6. The control method of claim 1, wherein the at least one storage compartment comprises a cryogenic compartment and a common cold compartment, the vapor compression refrigeration system configured to cool the cryogenic compartment and the common cold compartment, the stirling refrigeration system configured to cool the cryogenic compartment, and wherein in a quick-freeze mode of the cryogenic compartment, the control method further comprises:

7. The control method of claim 1, wherein the at least one storage compartment comprises a cryogenic compartment and a common cold compartment, the vapor compression refrigeration system configured to cool the cryogenic compartment and the common cold compartment, the stirling refrigeration system configured to cool the cryogenic compartment, and wherein in a quick-freeze mode of the cryogenic compartment, the control method further comprises:

8. The control method of claim 1, said at least one storage compartment comprising a cryogenic compartment and a common cold compartment, said vapor compression refrigeration system configured to cool said cryogenic compartment and said common cold compartment, said stirling refrigeration system configured to cool said cryogenic compartment, wherein in a normal mode of said cryogenic compartment, said control method further comprises:

9. The control method according to claim 1, characterized by further comprising:

10. A refrigerated chiller comprising:

the box body is limited with at least one storage compartment;

a controller configured to perform the control method of any one of claims 1-9.