CN116951865A

CN116951865A - Control method for refrigerating and freezing device and refrigerating and freezing device

Info

Publication number: CN116951865A
Application number: CN202310772357.0A
Authority: CN
Inventors: 孙永升; 朱小兵; 刘建如; 李靖; 万新明; 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: 2023-10-27
Also published as: CN111059835A; CN111059835B; CN116928942A

Abstract

The application provides a control method for a refrigeration and freezing device and the refrigeration and freezing device. A refrigeration and freezer includes a cabinet defining a cryogenic compartment, a vapor compression refrigeration system for providing refrigeration to the cryogenic compartment, and a stirling refrigeration system. The control method comprises the following steps: judging whether the room temperature of the cryogenic room is more than or equal to a set cryogenic temperature; if so, the vapor compression refrigeration system and the Stirling refrigeration system are controlled to alternately supply cold for the cryogenic compartment, so that the two systems are in the optimal working state, the refrigeration efficiency of the refrigeration and freezing device to the cryogenic compartment is improved as a whole, the energy consumption of the refrigeration and freezing device is reduced, and the service lives of the compressor and the Stirling refrigerator are prolonged.

Description

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

The application relates to a control method for a refrigeration and freezing device and a divisional application of the refrigeration and freezing device:

filing date of the original application: 20191227

Application number of the original application: 201911380189.0

The application of the original application creates the name: a control method for a refrigerating and freezing device and a refrigerating and freezing device.

Technical Field

The present application 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 ℃.

Disclosure of Invention

It is an object of the first aspect of the present application to provide a control method for a refrigeration and freezing apparatus, which can improve the overall refrigeration efficiency of the refrigeration and freezing apparatus.

A further object of the first aspect of the application is to avoid undesirable waste of energy.

It is a further object of the first aspect of the present application to avoid frequent opening and closing of the vapor compression refrigeration system and the stirling refrigeration system.

An object of the second aspect of the present application is to provide a refrigerating and freezing apparatus.

According to a first aspect of the present application there is provided a control method for a refrigeration chiller including a cabinet defining a cryogenic compartment, a vapour compression refrigeration system for providing refrigeration to the cryogenic compartment and a stirling refrigeration system, the control method comprising:

judging whether the room temperature of the cryogenic room is more than or equal to a set cryogenic temperature;

if yes, the vapor compression refrigeration system and the Stirling refrigeration system are controlled to alternately supply cold for the cryogenic compartment.

Optionally, the control method further includes:

judging whether the set cryogenic temperature is greater than or equal to a preset switching temperature;

if yes, controlling the vapor compression refrigeration system and the Stirling refrigeration system to alternately refrigerate in each refrigeration cycle;

if not, in the first refrigeration cycle, controlling the vapor compression refrigeration system to alternately refrigerate with the Stirling refrigeration system.

Optionally, the control method further includes:

and under the condition that the set cryogenic temperature is smaller than the preset switching temperature, in other refrigeration cycles except for a first refrigeration cycle, controlling the Stirling refrigeration system to cool the cryogenic compartment, and stopping the vapor compression refrigeration system from cooling the cryogenic compartment.

Optionally, the tank further defines a common cooling compartment, and the vapor compression refrigeration system is further configured to provide cooling to the common cooling compartment; the control method is characterized by further comprising the following steps:

determining a cool-supply time for each compressor refrigeration system to cool the cryogenic compartment in each alternating refrigeration cycle based on a set cryogenic temperature and an ambient temperature surrounding the refrigeration chiller; and/or

And determining the working rotation speed of a compressor of the vapor compression refrigeration system according to the set cryogenic temperature, the set common cooling temperature and the ambient temperature around the refrigeration and freezing device.

Optionally, the control method further includes:

determining the working power of a Stirling refrigerator of the Stirling refrigerating system according to the difference between the chamber temperature and the set cryogenic temperature and the ambient temperature around the refrigerating and freezing device; and/or

And determining the cooling time for cooling the cryogenic compartment by the Stirling refrigerating system each time in each alternate refrigerating cycle according to the set cryogenic temperature and the ambient temperature around the refrigerating and freezing device.

Optionally, during each refrigeration cycle of alternating refrigeration, the stirling refrigeration system initially cools the cryogenic compartment; and/or

In each alternate refrigeration cycle, the cooling time of the refrigeration system which supplies cold to the cryogenic compartment is greater than or equal to the cooling time of the refrigeration system which supplies cold to the cryogenic compartment.

Optionally, a cooling fan is disposed in the deep cooling room, and the control method includes:

when the vapor compression refrigeration system supplies cold for the cryogenic compartment, the duty ratio of the refrigeration fan is determined according to the set cryogenic temperature, and the duty ratio is smaller than 100%; and/or

When the Stirling refrigerating system is used for cooling the cryogenic compartment, the duty ratio of the refrigerating fan is 100%.

Optionally, the control method further includes:

judging whether the room temperature is smaller than a set cryogenic temperature or not;

if yes, controlling the vapor compression refrigeration system and the Stirling refrigeration system to stop providing cold energy for the cryogenic compartment;

and if not, controlling the vapor compression refrigeration system or the Stirling refrigeration system to continuously provide cold energy for the cryogenic compartment.

Optionally, the refrigerating and freezing device further comprises a detecting device for detecting the temperature of the compartment, and is characterized in that,

when judging whether the room temperature is larger than or equal to a set cryogenic temperature, the room temperature is the difference value of the detected temperature detected by the detection device minus a preset temperature fluctuation value; and/or

And when judging whether the room temperature is smaller than the set cryogenic temperature, the room temperature is the sum of the detected temperature detected by the detection device and a preset temperature fluctuation value.

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

a box defining a cryogenic compartment;

a vapor compression refrigeration system and a Stirling refrigeration system for providing refrigeration to the cryogenic compartment; and

a controller configured to perform the control method of any one of the preceding claims.

The application makes the Stirling refrigerating system and the vapor compression refrigerating system alternately operate to supply cold to the cryogenic compartment, so that the two systems are in the optimal working state, thereby not only improving the refrigerating efficiency of the refrigeration refrigerating device to the cryogenic compartment, but also reducing the energy consumption of the refrigeration refrigerating device and prolonging the service lives of the compressor and the Stirling refrigerator.

Further, the working rotation speed of the compressor is determined according to the set cryogenic temperature, the set general cooling temperature and the environment temperature, the working power of the Stirling refrigerator of the Stirling refrigerating system is determined according to the difference between the room temperature of the cryogenic room and the set cryogenic temperature and the environment temperature, the cooling time of each compressor refrigerating system for cooling the cryogenic room and the cooling time of each Stirling refrigerating system for cooling the cryogenic room in each alternate refrigerating cycle are determined according to the set cryogenic temperature and the environment temperature, the efficiency of cooling the general cooling room is not reduced, the high-efficiency cooling of the cryogenic room is realized, the power of the refrigerating and freezing device is reasonably distributed, the unexpected energy waste is avoided, and the user experience is improved.

Further, the application determines the duty ratio of the refrigerating fan when the compressor supplies cold for the cryogenic compartment according to the set cryogenic temperature, so that the heat exchange between the hot air and the cold air in the cryogenic compartment is more sufficient, the refrigerating efficiency is improved, the unexpected energy waste is avoided, the cold energy is prevented from accumulating at the refrigerating fan, and the service life of the refrigerating fan is further prolonged.

Furthermore, the temperature value detected by the detection device is corrected by setting the temperature fluctuation value, so that frequent on-off of a part of the vapor compression refrigeration system for cooling the cryogenic compartment, even frequent on-off of a compressor or frequent on-off of the Stirling refrigeration system are avoided, and the service lives of the vapor compression refrigeration system and the Stirling refrigeration system are further prolonged.

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

Drawings

Some specific embodiments of the application 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 application;

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 application;

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

fig. 9 is a detailed flowchart of a control method for a refrigerating and freezing apparatus according to the present application.

Detailed Description

Fig. 1 is a schematic cross-sectional view of a refrigerated chiller 100 according to one embodiment of the present application; 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 common cold liner 113, the common cold compartment defined by the common cold liner 114 and the common cold liner 115, and the sub-cooled compartment defined by the sub-cooled liner 116, and the stirling refrigeration system may be configured to provide cooling only to the sub-cooled compartment defined by the sub-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 application. 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 application when the computer program 193 is executed by the processing unit 191.

In particular, the refrigeration and freezer 100 is provided with a normal mode. In the normal mode, fig. 7 is a schematic structural diagram of the controller 190 of one embodiment of the present application. 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 application when the computer program 193 is executed by the processing unit 191.

In particular, the refrigeration and freezer 100 is provided with a normal mode. 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 compartment when the compartment temperature of the cryogenic compartment is greater than or equal to a set cryogenic temperature.

In the present application, the set cryogenic temperature is a user input or a default set storage temperature for the cryogenic compartment.

The refrigerating and freezing device 100 of the present application starts the two systems from the stirling refrigerating system and alternately operates with the vapor compression refrigerating system to supply cold to the cryogenic compartment, so that both systems are in the optimal working state, not only the refrigerating efficiency of the refrigerating and freezing device 100 to the cryogenic compartment is improved as a whole, but also the energy consumption of the refrigerating and freezing device 100 is reduced, and the service lives of the compressor 131 and the stirling refrigerator 120 are prolonged.

In each alternate refrigeration cycle, the Stirling refrigeration system may initially cool the cryogenic compartment to further increase the refrigeration efficiency of the refrigeration chiller 100 to the cryogenic compartment as a whole while optimizing the operation of both systems.

In some embodiments, 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.

In the present application, 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 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 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.

In some embodiments, 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 application.

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.

In some embodiments, the controller 190 may be further configured to determine the operating speed of the compressor 131 based on the set cryogenic temperature, the set chilling temperature, and the ambient temperature surrounding the refrigeration chiller 100 to make the power distribution of the refrigeration chiller 100 more rational, while achieving efficient cooling of the cryogenic compartment without reducing the efficiency of cooling the cryogenic compartment.

In the application, 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, where the set sub-ambient temperature and the set sub-ambient temperature are the same.

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

Under the condition that the set normal cooling temperature is the same as the ambient temperature, when the set cryogenic temperature is greater than or equal to the preset cryogenic temperature, the working rotation speed of the compressor 131 can be greater than or equal to the working rotation speed when the set cryogenic temperature is less than the preset cryogenic temperature, so as to improve the refrigeration efficiency.

For example, 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 less than-21 ℃ when the set cryogenic temperature is more than or equal to-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 provides the supercooling amount to 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 application, 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 application, 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

In some embodiments, the controller 190 may be configured to determine the cool down time for each Stirling refrigeration system to cool down the cryogenic compartment and the cool down time for each compressor refrigeration system to cool down the cryogenic compartment in each alternating refrigeration cycle based on the set cryogenic temperature and the ambient temperature surrounding the refrigerated freezer 100 to avoid undesirable energy waste.

The time for cooling each stirling cooler system to cool the sub-ambient and the time for cooling each compressor cooler system to cool the sub-ambient in each alternating cool down cycle may be approximately inversely proportional to the set sub-ambient temperature.

The time for cooling each stirling cooler and the time for cooling each compressor cooler for the cryogenic compartments in each alternating refrigeration cycle may be approximately proportional to the ambient temperature, with the set cryogenic temperatures being the same.

Table 4 shows the different set common cooling temperatures when the compressor 131 provides cooling power to the sub-cooling compartments in the normal mode according to an exemplary embodiment of the present application, and the cooling time for the sub-cooling compartments to be cooled by the compressor refrigeration system each time in an alternate refrigeration cycle corresponding to the ambient temperature around the different refrigeration chiller 100, wherein the unit of the operation time of the compressor 131 is minutes (min), and the unit of the set common cooling temperature and the unit of the ambient temperature are degrees celsius (deg.c).

TABLE 4 Table 4

In some embodiments, the cooling time of the cooling system that supplies cooling to the cryogenic compartment in the next direction may be greater than or equal to the cooling time of the cooling system that supplies cooling to the cryogenic compartment in the previous direction in each alternating cooling cycle, so as to avoid frequent switching of the two systems while ensuring the performance of the two cooling 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 some further embodiments, the controller 190 may be configured to determine the duty cycle (ratio of operating speed to rated speed) of the refrigeration blower 134 based on a 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 allow the hot air in the cryogenic compartment to exchange heat with the cold air more fully, to increase refrigeration efficiency, to avoid undesirable energy waste, and to extend the useful life of the refrigeration blower. 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 application, wherein the set cryogenic temperatures are given in degrees celsius (°c).

TABLE 5

In some further embodiments, the controller 190 may be configured to control the refrigeration fan 134 to operate at a 100% duty cycle when the Stirling refrigeration system is cooling a cryogenic compartment to further increase refrigeration efficiency, avoiding too much concentration of cold to reduce the useful life of the refrigeration fan 134.

In some embodiments, the refrigerator-freezer 100 may also be provided with a quick-freeze 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 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.

Specifically, table 6 shows the different set cooling temperatures when the compressor 131 provides the cooling capacity to the deep-cooling compartment in the quick-freezing mode according to one exemplary embodiment of the present application, and the operating speeds of the compressor 131 corresponding to the ambient temperatures around the different refrigerating and freezing apparatuses 100, wherein the operating speeds of the compressor 131 are expressed in revolutions per minute (rpm), and the set cooling temperatures and the ambient temperatures are expressed in degrees celsius (°c).

TABLE 6

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

In some embodiments, in both 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 cease providing refrigeration to the cryogenic compartment when the compartment temperature is less than the set cryogenic temperature.

In some embodiments, the refrigeration and freezer 100 can further include a detection device for detecting the compartment temperature of the cryogenic 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.

Fig. 8 is a flowchart of a control method for the refrigerating and freezing apparatus 100 according to an embodiment of the present application. Referring to fig. 8 (in the present application, "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 application may include the steps of:

step S802: and judging whether the room temperature of the cryogenic room is greater than or equal to the set cryogenic temperature.

Step S804: if so, the vapor compression refrigeration system and the Stirling refrigeration system are controlled to alternately supply cold for the cryogenic compartment.

The control method of the application enables the two systems to be in the optimal working state by starting from the Stirling refrigerating system and alternately running with the vapor compression refrigerating system to supply cold to the cryogenic compartment, thus not only improving the refrigerating efficiency of the refrigerating and freezing device to the cryogenic compartment on the whole, but also reducing the energy consumption of the refrigerating and freezing device and prolonging the service lives of the compressor and the Stirling refrigerator.

In step S804, the stirling cooler system may initially cool the sub-ambient air during each of the alternating cooling cycles to further increase the cooling efficiency of the refrigeration chiller 100 to the sub-ambient air while optimizing operation of both systems.

In some embodiments, after step S802, it may further include:

judging whether the set cryogenic temperature is more than or equal to a preset switching temperature;

if yes, in each refrigeration cycle, step S804 is performed;

if not, in the first refrigeration cycle, step S804 is performed; in other refrigeration cycles except the first refrigeration cycle, the vapor compression refrigeration system is controlled to stop cooling the cryogenic compartment, and the Stirling refrigeration system is controlled to cool the cryogenic compartment, so that the refrigeration efficiency is improved, and meanwhile, the use requirement of a user is met.

In some embodiments, the operating speed of the compressor 131 may be determined according to the set cryogenic temperature, the set common cooling temperature, and the ambient temperature surrounding the refrigeration chiller 100 to make the power distribution of the refrigeration chiller 100 more reasonable, and to achieve efficient cooling of the cryogenic compartment without reducing the efficiency of cooling the common compartment.

In some embodiments, the operating power of the Stirling cooler 120 may be determined based on the difference between the compartment temperature of the cryogenic compartment and the set cryogenic temperature and the ambient temperature surrounding the refrigeration and chiller 100 to conserve energy while maintaining refrigeration efficiency.

The time for each vapor compression refrigeration system to cool the cryogenic compartment and the time for the stirling refrigeration system to cool the cryogenic compartment in each alternating refrigeration cycle may be determined based on the set cryogenic temperature and the ambient temperature surrounding the refrigeration chiller 100 to avoid undesirable energy waste.

In each alternate refrigeration cycle, the cooling time of the refrigeration system which supplies cold to the cryogenic compartment can be greater than or equal to the cooling time of the refrigeration system which supplies cold to the cryogenic compartment in the past, so as to avoid frequent switching of the two systems while ensuring the performance of the two refrigeration systems.

In some embodiments, the duty cycle (ratio of operating speed to rated speed) of the refrigeration fan 134 may be determined based on a set cryogenic temperature when the vapor compression refrigeration system is cooling a cryogenic compartment. The duty ratio can be smaller than 100%, so that the heat exchange between the hot air and the cold air in the deep cooling compartment is more sufficient, the refrigeration efficiency is improved, the undesirable energy waste is avoided, and the service life of the refrigeration fan is prolonged. The duty cycle of the refrigeration fan 134 may be inversely proportional to the set cryogenic temperature.

When the Stirling refrigeration system is used for cooling the cryogenic compartment, the refrigeration fan 134 can be operated with a duty cycle of 100% to further improve the refrigeration efficiency and avoid the service life of the refrigeration fan 134 from being reduced due to too concentrated cold.

Fig. 9 is a detailed flowchart of a control method for the refrigerating and freezing apparatus 100 according to the present application. Referring to fig. 9, the control method for the refrigerating and freezing apparatus 100 of the present application 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 set cryogenic temperature is greater than or equal to a preset switching temperature. If yes, go to step S908; if not, go to step S910.

Step S908: 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 S902.

Step S910: 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 S902.

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 set cryogenic temperature is greater than or equal to a preset switching temperature. If yes, go to step S916; if not, go to step S918.

Step S916: and controlling the vapor compression refrigeration system and the Stirling refrigeration system to alternately refrigerate. And returns to step S902.

Step S918: 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 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.

Further, the controller 190 may be configured to step up the input voltage to the Stirling refrigerator 120 each time the Stirling refrigerator 120 is started at full power to avoid cylinder collision of the Stirling refrigerator 120. For example, the Stirling refrigerator 120 is turned on and then increased from 0 volts (V) to a rated voltage in preset steps every preset time interval.

By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the application have been shown and described herein in detail, many other variations or modifications of the application consistent with the principles of the application may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the application. Accordingly, the scope of the present application 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 a cryogenic compartment, a vapor compression refrigeration system for providing refrigeration to the cryogenic compartment, and a stirling refrigeration system, the control method comprising:

if yes, controlling the vapor compression refrigeration system and the Stirling refrigeration system to alternately cool the cryogenic compartment; wherein, the liquid crystal display device comprises a liquid crystal display device,

in each refrigeration cycle of alternating refrigeration, the Stirling refrigeration system initially cools the cryogenic compartment.

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

3. The control method according to claim 2, characterized by further comprising:

4. The control method of claim 1, said housing further defining a common cooling compartment, said vapor compression refrigeration system further configured to provide cooling to said common cooling compartment; the control method is characterized by further comprising the following steps:

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

6. The control method according to claim 1, wherein a cooling fan is provided in the sub-cooling compartment, and the control method comprises:

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

8. The control method according to claim 7, wherein the refrigerating and freezing apparatus further comprises a detecting means for detecting the temperature of the compartment,

9. A refrigerated chiller comprising:

a box defining a cryogenic compartment;

a controller configured to perform the control method of any one of claims 1-8.