CN115111871A - Refrigerating and freezing device and defrosting control method thereof - Google Patents
Refrigerating and freezing device and defrosting control method thereof Download PDFInfo
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- CN115111871A CN115111871A CN202110287112.XA CN202110287112A CN115111871A CN 115111871 A CN115111871 A CN 115111871A CN 202110287112 A CN202110287112 A CN 202110287112A CN 115111871 A CN115111871 A CN 115111871A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/006—Defroster control with electronic control circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B21/00—Machines, plants or systems, using electric or magnetic effects
- F25B21/02—Machines, plants or systems, using electric or magnetic effects using Peltier effect; using Nernst-Ettinghausen effect
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D11/00—Self-contained movable devices, e.g. domestic refrigerators
- F25D11/02—Self-contained movable devices, e.g. domestic refrigerators with cooling compartments at different temperatures
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/02—Detecting the presence of frost or condensate
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
- F25D21/08—Removing frost by electric heating
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/006—General constructional features for mounting refrigerating machinery components
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The invention provides a refrigerating and freezing device and a defrosting control method thereof, wherein the refrigerating and freezing device comprises a first storage chamber and a semiconductor refrigerating system used for adjusting the temperature of the first storage chamber, the semiconductor refrigerating system comprises a semiconductor refrigerating sheet with a hot end and a cold heat exchanger connected with the cold end, the cold heat exchanger is configured to provide cold energy for the first storage chamber, the semiconductor refrigerating sheet is configured to release heat at the hot end when forward voltage is input to the semiconductor refrigerating sheet, the cold end absorbs heat, and is configured to absorb heat at the hot end and release heat at the cold end when reverse voltage is input to the semiconductor refrigerating sheet. The control method comprises the following steps: acquiring a trigger signal for starting defrosting of the cold heat exchanger; after a triggering signal for starting defrosting of the cold heat exchanger is received, a first reverse voltage is input to the semiconductor refrigerating sheet; detecting the temperature of the cold heat exchanger; the reverse voltage value input to the semiconductor refrigerating sheet is dynamically adjusted according to the temperature of the cold heat exchanger, so that the defrosting requirement of the cold heat exchanger is met, and meanwhile, the power consumption is reduced.
Description
Technical Field
The invention relates to the technical field of refrigeration and freezing storage, in particular to a refrigeration and freezing device and a defrosting control method thereof.
Background
For the refrigerating and freezing device utilizing the semiconductor refrigeration, when the semiconductor refrigeration piece is connected with forward voltage, the cold end of the semiconductor refrigeration piece refrigerates, the hot end of the semiconductor refrigeration piece generates heat, and the cold heat exchanger in contact with the cold end exchanges heat with the compartment to realize the refrigeration of the compartment.
Semiconductor refrigeration piece can pile up the frost layer on the cold heat exchanger in long-term refrigeration process, and current cold-stored refrigerating plant generally inputs fixed reverse voltage to semiconductor refrigeration piece for hot junction and cold junction conversion, hot junction absorbed heat, and the cold junction releases the heat, melts the frost layer on the cold heat exchanger, and the energy consumption is great.
Disclosure of Invention
An object of the present invention is to provide a refrigerating and freezing apparatus and a defrosting control method thereof which solve at least the above problems.
It is a further object of the present invention to reduce defrosting energy consumption.
Particularly, according to one aspect of the invention, the invention firstly provides a defrosting control method for a refrigerating and freezing device, wherein the refrigerating and freezing device comprises a first storage compartment and a semiconductor refrigerating system used for adjusting the temperature of the first storage compartment, the semiconductor refrigerating system comprises a semiconductor refrigerating sheet with a hot end and a cold heat exchanger connected with the cold end, the cold heat exchanger is configured to provide cold for the first storage compartment, the semiconductor refrigerating sheet is configured to release heat at the hot end when a forward voltage is input to the semiconductor refrigerating sheet, the cold end absorbs heat, and the hot end absorbs heat and the cold end releases heat when a reverse voltage is input to the semiconductor refrigerating sheet;
the control method comprises the following steps:
acquiring a trigger signal for starting defrosting of the cold heat exchanger;
after receiving a trigger signal for starting defrosting of the cold heat exchanger, executing a defrosting control process of the cold heat exchanger;
the defrosting control process of the cold heat exchanger comprises the following steps:
inputting a first reverse voltage to the semiconductor refrigeration chip;
detecting a temperature of the cold heat exchanger;
and dynamically adjusting the reverse voltage value input to the semiconductor refrigerating sheet according to the temperature of the cold heat exchanger.
Optionally, before the step of inputting the first reverse voltage to the semiconductor chilling plate, the method further includes:
detecting the power-on state of the semiconductor refrigerating sheet;
and powering off the semiconductor chilling plate which is in forward voltage operation for a first preset time.
Optionally, the step of dynamically adjusting the reverse voltage value input to the semiconductor chilling plate according to the temperature of the cold heat exchanger includes:
when the temperature of the cold heat exchanger is greater than or equal to a first preset temperature and less than a second preset temperature, inputting a second reverse voltage which is less than the first reverse voltage to the semiconductor refrigeration sheet;
when the temperature of the cold heat exchanger is greater than or equal to the second preset temperature and less than a third preset temperature, inputting a third reverse voltage which is less than the second reverse voltage to the semiconductor refrigeration sheet;
and when the temperature of the cold heat exchanger is greater than or equal to the third preset temperature, stopping inputting voltage to the semiconductor chilling plate.
Optionally, the semiconductor refrigeration system further comprises a hot heat exchanger connected to the hot side to dissipate heat from the hot side;
the refrigeration and freezing device further comprises a second storage chamber, a compressor, a first capillary tube, a first evaporator and a first heating device for defrosting the first evaporator, wherein the first evaporator is configured to provide cold for the second storage chamber, and the heat exchanger is arranged between the outlet end of the first capillary tube and the inlet end of the first evaporator, so that a refrigerant flows through the heat exchanger to dissipate heat of the hot end, and the first storage chamber is lowered to a cryogenic temperature lower than that of the second storage chamber;
the control method further comprises the following steps:
acquiring a trigger signal for starting defrosting of the first evaporator;
executing a defrosting control process of the first evaporator after receiving a triggering signal for starting defrosting of the first evaporator;
the defrosting control process of the first evaporator includes:
turning off the compressor, and after a second preset time, turning on the first heating device to defrost the first evaporator;
and when the temperature of the first evaporator is greater than or equal to a fourth preset temperature, closing the first heating device.
Optionally, before the defrosting control process of the cold heat exchanger is executed, the method further includes:
when a trigger signal for starting defrosting of the first evaporator is received, a defrosting control process of the first evaporator is executed firstly, and then a defrosting control process of the cold heat exchanger is executed;
and, the control method further includes:
and in the defrosting control process of the cold heat exchanger, when the second storage chamber needs to refrigerate, the compressor is started.
Optionally, the refrigeration and freezing device further comprises a third storage compartment and a second evaporator, the second evaporator is configured to provide cold energy to the third storage compartment, and an outlet of the second evaporator is communicated with an inlet of the hot heat exchanger;
the control method further comprises the following steps:
acquiring a trigger signal for starting defrosting of the second evaporator;
after the trigger signal for starting defrosting of the second evaporator is received, when the trigger signal for starting defrosting of the first evaporator is received, the defrosting control process of the first evaporator is executed firstly, and then the defrosting control process of the second evaporator is executed.
Optionally, the refrigerating and freezing device further comprises a second capillary tube, a condenser and a switching valve, wherein an inlet end of the switching valve is communicated with an outlet end of the condenser, a first outlet end of the switching valve is connected with an inlet end of the first capillary tube, a second outlet end of the switching valve is connected with an inlet end of the second capillary tube, and an inlet end of the second evaporator is connected with an outlet end of the second capillary tube;
the control method further comprises the following steps:
in the defrosting control process of the second evaporator, the switching valve is controlled to conduct the first outlet end of the switching valve and the inlet end of the first capillary tube, and the compressor is started when the first storage chamber needs to be refrigerated and/or the second storage chamber needs to be refrigerated;
in the defrosting control process of the cold heat exchanger, when the second storage chamber needs to be refrigerated and/or the third storage chamber needs to be refrigerated, the compressor is started, when the third storage chamber needs to be refrigerated, the switching valve is controlled to conduct the second outlet end of the switching valve and the inlet end of the second capillary tube, and when the second storage chamber needs to be refrigerated, the switching valve is controlled to conduct the first outlet end of the switching valve and the inlet end of the first capillary tube.
Optionally, the refrigeration chiller further comprises a second heating device for defrosting the second evaporator;
the defrosting control process of the second evaporator includes:
turning on the second heating device;
judging whether the temperature of the second evaporator is greater than or equal to a fifth preset temperature or not;
if yes, the second heating device is closed.
According to another aspect of the present invention, there is also provided a refrigeration and freezing apparatus comprising:
the refrigerator comprises a refrigerator body, a first storage chamber and a second storage chamber, wherein the first storage chamber is defined in the refrigerator body;
the semiconductor refrigeration system comprises a semiconductor refrigeration piece with a hot end and a cold end, and a cold heat exchanger connected with the cold end, wherein the cold heat exchanger is configured to provide cold for the first storage compartment, the semiconductor refrigeration piece is configured to release heat at the hot end when being electrified with forward voltage, the cold end absorbs heat, and the hot end absorbs heat and the cold end releases heat when being electrified with reverse voltage;
a controller having a memory and a processor, and a computer program stored in the memory, the computer program being executable by the processor to implement a defrosting control method for a refrigeration and freezing apparatus of any one of the preceding claims.
Optionally, the semiconductor refrigeration system further comprises a hot heat exchanger connected to the hot side to dissipate heat from the hot side;
the refrigerator body is also provided with a second storage compartment, and the refrigerating and freezing device further comprises a compressor, a first capillary tube, a first evaporator and a first heating device for defrosting the first evaporator;
the first evaporator is configured to provide cold energy for the second storage chamber, and the heat exchanger is arranged between the outlet end of the first capillary tube and the inlet end of the first evaporator, so that a refrigerant flows through the heat exchanger to dissipate heat of the hot end, and the first storage chamber is reduced to a cryogenic temperature lower than that of the second storage chamber.
Optionally, the box body further defines a third storage compartment;
the refrigerating and freezing device also comprises a second evaporator, a second capillary tube, a condenser, a switching valve and a second heating device for defrosting the second evaporator;
the second evaporator is configured to provide cold energy to the third storage compartment, the inlet end of the second evaporator is connected with the outlet end of the second capillary tube, the outlet end of the second evaporator is communicated with the inlet end of the heat exchanger, the inlet end of the switching valve is communicated with the outlet end of the condenser, the first outlet end of the switching valve is connected with the inlet end of the first capillary tube, and the second outlet end of the switching valve is connected with the inlet end of the second capillary tube.
According to the refrigerating and freezing device and the defrosting control method thereof, the reverse voltage value input to the semiconductor refrigerating sheet is dynamically adjusted according to the temperature of the cold heat exchanger, the gradually changing defrosting requirement of the cold heat exchanger in the defrosting process can be adaptively matched with the input reverse voltage value, and the power consumption is reduced while the defrosting requirement of the cold heat exchanger is met.
Further, according to the refrigeration and freezing device and the defrosting control method thereof, when the first evaporator and the second evaporator and/or the cold heat exchanger need defrosting at the same time, defrosting of the first evaporator is preferentially ensured, and the compressor or the semiconductor refrigeration system can be started according to refrigeration requirements in the defrosting process of the second evaporator or the cold heat exchanger, so that the refrigeration requirements of the storage compartments are balanced, and the refrigeration efficiency is improved.
The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments thereof, taken 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 in the drawings identify the same or similar elements or components. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale. In the drawings:
fig. 1 is a schematic structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention;
figure 2 is a schematic diagram of a refrigeration system of a refrigerated freezer according to one embodiment of the present invention;
FIG. 3 is a schematic view of a semiconductor refrigeration system of a refrigeration chiller according to one embodiment of the present invention;
fig. 4 is a schematic diagram of a defrosting control method of a refrigerating and freezing apparatus according to an embodiment of the present invention;
fig. 5 is a detailed flow diagram of a defrosting control method of a refrigerating and freezing apparatus according to an embodiment of the present invention;
fig. 6 is a flow chart of defrosting control of the cold heat exchanger in the defrosting control method of the refrigerating and freezing apparatus according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating a defrosting control of a first evaporator in a defrosting control method of a refrigerating and freezing apparatus according to an embodiment of the present invention;
fig. 8 is a flowchart illustrating a defrosting control of the second evaporator in the defrosting control method of the refrigerating and freezing apparatus according to an embodiment of the present invention; and
figure 9 is a schematic diagram of the connection of components of a refrigeration freezer apparatus according to one embodiment of the present invention.
Detailed Description
For convenience of description, the directions of "up", "down", "front", "back", "top", "bottom", "lateral" and the like referred to in the specification are defined according to the spatial position relationship of the refrigeration and freezing apparatus 10 in the normal operation state.
The refrigerating and freezing apparatus 10 of the present embodiment will be described in detail below with reference to fig. 1 to 3 and 9.
The refrigerating and freezing apparatus 10 of the present embodiment may be an apparatus having a refrigerating and freezing function, such as a refrigerator or freezer. The refrigerating and freezing device 10 comprises a first storage compartment 110, a semiconductor refrigeration system 150 for regulating the temperature of the first storage compartment 110, the semiconductor refrigeration system 150 comprising a semiconductor refrigeration sheet 155 having a hot end 153 and a cold end 154, and a cold heat exchanger 152 connected to the cold end 154, the cold heat exchanger 152 being configured to provide cold energy to the first storage compartment 110, the semiconductor refrigeration sheet 155 being configured such that when it is supplied with a forward voltage, the hot end 153 releases heat, the cold end 154 absorbs heat, and being configured such that when it is supplied with a reverse voltage, the hot end 153 absorbs heat, and the cold end 154 releases heat.
As is well known to those skilled in the art, the semiconductor refrigeration system 150 mainly utilizes the peltier effect, when current passes through a galvanic couple formed by two different semiconductor materials connected in series, heat can be absorbed and released at two ends of the galvanic couple respectively, so as to achieve the purpose of refrigeration. The semiconductor cooling fins 155 generate a temperature difference between the hot side 153 and the cold side 154 after being energized, and when the temperature of the hot side 153 is lowered, the temperature of the cold side 154 is lowered. Therefore, to lower the temperature of cold end 154, the heat released from hot end 153 needs to be dissipated continuously to maintain the reduced temperature of cold end 154.
In this embodiment, the hot end 153 of the semiconductor refrigeration system 150 may dissipate heat by means of a compression refrigeration system, specifically, the semiconductor refrigeration system 150 further includes a hot heat exchanger 151 connected to the hot end 153 to dissipate heat from the hot end 153, the refrigeration and freezing device 10 further includes a second storage compartment 130, a compressor 101, a first capillary tube 106, and a first evaporator 104, the first evaporator 104 is configured to provide cold energy to the second storage compartment 130, and the hot heat exchanger 151 is disposed between an output end of the first capillary tube 106 and an input end of the first evaporator 104, so that a refrigerant flows through the hot heat exchanger 151 to dissipate heat from the hot end 153, thereby lowering the first storage compartment 110 to a cryogenic temperature lower than that of the second storage compartment 130.
Refrigerant gas in a high-temperature and high-pressure state discharged from an outlet of the compressor 101 enters the condenser 102, is condensed into refrigerant liquid in a high-pressure and normal-temperature state by the condenser 102, enters the first capillary tube 106, is throttled by the first capillary tube 106 to become a low-temperature and low-pressure refrigerant, enters the heat exchanger 151, and exchanges heat with the hot end 153. When the semiconductor refrigeration sheet 155 is applied with forward voltage, the refrigerant evaporates and absorbs heat in the hot heat exchanger 151 to quickly take away heat of the hot end 153, the hot end 153 is maintained in a low-temperature environment, further temperature reduction of the cold end 154 is realized by means of refrigeration temperature difference of the semiconductor, deep refrigeration of the first storage room 110 is realized through heat exchange of the cold heat exchanger 152 in an indirect contact or forced convection mode, and the deep refrigeration requirement is met.
Further, the refrigerating and freezing device 10 may further include a third storage compartment 120 and a second evaporator 103, the second evaporator 103 is configured to provide cold energy to the third storage compartment 120, and an outlet of the second evaporator 103 is communicated with an inlet of the heat exchanger 151.
In order to meet the refrigeration requirements of different set temperatures of the second storage compartment 130 and the third storage compartment 120, the refrigeration and freezing device 10 of the present embodiment may further include a second capillary 107 and a switching valve 105, an inlet of the switching valve 105 is communicated with an outlet of the condenser 102, a first outlet of the switching valve 105 is connected to an inlet of the first capillary 106, a second outlet of the switching valve 105 is connected to an inlet of the second capillary 107, and an inlet of the second evaporator 103 is connected to an outlet of the second capillary 107.
When the first storage room 110 and/or the second storage room 130 need to be refrigerated, the switching valve 105 is controlled to conduct the first outlet of the switching valve and the inlet of the first capillary 106, and when the third storage room 120 needs to be refrigerated, the switching valve 105 is controlled to cause the second outlet of the switching valve and the inlet of the second capillary 107.
The flow rate of the first capillary 106 is smaller than that of the second capillary 107, the flow rate of the first capillary 106 is smaller, the throttling effect is stronger, when the switching valve 105 is switched to conduct the first outlet end of the first capillary 106 with the inlet end of the first capillary, the temperatures of the first evaporator 104 and the heat exchanger 151 can be lower, so that the cryogenic requirement of the first storage room 110 and the low temperature requirement of the second storage room 130 are realized, when the switching valve 105 is switched to conduct the second outlet end of the switching valve with the inlet end of the second capillary 107, the temperature of the second evaporator 103 can be reduced, the temperature requirement of the third storage room 120 is realized, so that the temperature of the third storage room 120 is higher than that of the second storage room 130, and three storage rooms with different temperature intervals are formed.
As above, the first storage compartment 110 may be a deep cooling compartment, the second storage compartment 130 may be a freezing compartment, and the third storage compartment 120 may be a refrigerating compartment. The temperature range of the deep cooling chamber may be-30 to-40 ℃, the temperature range of the freezing chamber may be-15 to-24 ℃, the temperature range of the refrigerating chamber may be 1 to 9 ℃, and the foregoing temperature ranges are merely examples and the present invention is not limited thereto.
To accelerate cooling of each storage compartment, the refrigeration freezer 10 may further include a first fan 156, a second fan 108, and a third fan 109, the first fan 156 configured to cause airflow to circulate between the cold heat exchanger 152 and the first storage compartment 110, thereby accelerating cooling of the first storage compartment 110; the second fan 108 is configured to promote the circulation of the airflow between the first evaporator 104 and the second storage compartment 130, and accelerate the cooling of the second storage compartment 130; the third fan 109 is configured to promote the circulation of the airflow between the second evaporator 103 and the third storage compartment 120, and accelerate the cooling of the third storage compartment 120.
As shown in the drawings, the refrigerating and freezing device 10 of the present embodiment may further include an ice making compartment 140, and the second evaporator 103 may provide cooling capacity to the ice making compartment 140. One of the distribution patterns of the compartments of the refrigeration and freezing apparatus 10 may be: the ice making compartment 140 and the first storage compartment 110 may be distributed in the transverse direction, the second storage compartment 130 is located below the ice making compartment 140 and the first storage compartment 110, and the third storage compartment 120 is located above the ice making compartment 140 and the first storage compartment 110.
The refrigerator freezer 10 may further include a first heating device 170 for defrosting the first evaporator 104 and a second heating device 180 for defrosting the second evaporator 103. The first heating device 170 and the second heating device 180 may be heating wires, and when the first heating device and the second heating device are powered on, the corresponding evaporators are defrosted.
For defrosting of the cold heat exchanger 152, in the conventional semiconductor refrigeration system 150, a fixed reverse voltage is generally input to the semiconductor refrigeration sheet 155, so that the hot end 153 and the cold end 154 are switched, the hot end 153 absorbs heat, the cold end 154 releases heat, a frost layer on the cold heat exchanger 152 is melted, and the purpose of defrosting the cold heat exchanger 152 is achieved. However, during defrosting, the reverse voltage input to the semiconductor cooling plate 155 is always constant, which increases power consumption and causes unnecessary energy waste.
For this reason, based on the aforementioned refrigeration and freezing apparatus 10, referring to fig. 4 to 8, the present embodiment provides a defrosting control method of the refrigeration and freezing apparatus 10.
First, regarding defrosting of the cold heat exchanger 152, the present embodiment provides a control manner for dynamically adjusting the reverse voltage input to the semiconductor cooling plate 155, and specifically, as shown in fig. 4, the control method of the present embodiment includes:
s402, acquiring a trigger signal for starting defrosting of the cold heat exchanger 152;
s404, after receiving a trigger signal for starting defrosting of the cold heat exchanger 152, executing a defrosting control process of the cold heat exchanger 152;
the defrosting control process of the cold heat exchanger 152 includes:
s406, inputting a first reverse voltage to the semiconductor chilling plate 155;
s408, detecting the temperature of the cold heat exchanger 152;
s410, dynamically adjusting the reverse voltage value input to the semiconductor cooling plate 155 according to the temperature of the cold heat exchanger 152.
The refrigerating and freezing device 10 can determine the triggering time for starting the cold heat exchanger 152 to defrost according to the accumulated door opening time of the first storage compartment 110 and the accumulated running time of the forward voltage input to the semiconductor refrigerating sheet 155, so as to avoid the influence on the refrigerating efficiency caused by the over-thick frost layer of the cold heat exchanger 152 and ensure the timely defrosting of the cold heat exchanger 152.
The defrosting control method of this embodiment dynamically adjusts the reverse voltage value input to the semiconductor cooling plate 155 according to the temperature of the cold heat exchanger 152, and can adaptively match the gradually changing defrosting requirement of the cold heat exchanger 152 during the defrosting process with the input reverse voltage value, thereby reducing the power consumption while satisfying the defrosting requirement of the cold heat exchanger 152.
In one embodiment, the step of dynamically adjusting the reverse voltage value input to the semiconductor chilling plate 155 according to the temperature of the cold heat exchanger 152 comprises:
when the temperature of the cold heat exchanger 152 is greater than or equal to the first preset temperature and less than the second preset temperature, inputting a second reverse voltage less than the first reverse voltage to the semiconductor chilling plate 155;
when the temperature of the cold heat exchanger 152 is greater than or equal to the second preset temperature and less than the third preset temperature, a third reverse voltage less than the second reverse voltage is input to the semiconductor chilling plate 155;
when the temperature of the cold heat exchanger 152 is equal to or higher than the third preset temperature, the input of the voltage to the semiconductor chilling plate 155 is stopped.
In the process of defrosting the cold heat exchanger 152, in the initial defrosting stage, as the temperature of the cold heat exchanger 152 is lower and the thickness of the frost layer is thicker, more heat is needed to raise the temperature of the cold heat exchanger 152, for this reason, a larger first reverse voltage is firstly input to the semiconductor chilling plate 155, the cold heat exchanger 152 with more frost can fully utilize the heat released by the cold end 154, as the temperature of the cold heat exchanger 152 gradually rises, the frost layer gradually melts, the thickness of the frost layer becomes smaller and smaller, and the reverse voltage value input to the semiconductor chilling plate 155 is gradually reduced until the voltage input to the semiconductor chilling plate 155 is stopped when the temperature of the cold heat exchanger 152 rises to a certain degree.
The control method of the embodiment divides the temperature change of the cold heat exchanger 152 into three preset reference values, and as the temperature of the cold heat exchanger 152 increases, the frost layer melts, and the value of the reverse voltage input to the semiconductor chilling plate 155 is smaller until the power is cut off, so that the defrosting requirement of the cold heat exchanger 152 is met, and the energy consumption is reduced.
The first reverse voltage may be a maximum reverse voltage of the semiconductor chilling plate 155, the second reverse voltage may be a rated reverse voltage, and the third reverse voltage may be a minimum reverse voltage, so as to simplify control of the power supply of the semiconductor chilling plate 155.
The first preset temperature, the second preset temperature and the third preset temperature can be preset according to experimental tests, wherein the third preset temperature should be higher than 0 ℃ to ensure that the temperature of the cold heat exchanger 152 is above zero when the power is off, so that the frost layer of the cold heat exchanger 152 can be melted in time. For example, the first preset temperature, the second preset temperature and the third preset temperature can be-5 ℃, 1 ℃ and 6 ℃ respectively.
When a trigger signal for starting defrosting of the cold heat exchanger 152 is received, the semiconductor refrigeration system 150 may be in an energized state to provide cold energy to the first storage compartment 110, or the first storage compartment 110 reaches a shutdown point and the semiconductor refrigeration system 150 is in a power-off state, so that before a reverse voltage is input to the semiconductor chilling plate 155, the energized state of the semiconductor chilling plate 155 needs to be detected, the semiconductor chilling plate 155 which is in operation with a forward voltage is powered off for a first preset time, and then a first reverse voltage is input to the semiconductor chilling plate 155. When the semiconductor cooling plate 155 is operated, the temperature of the cold end 154 and the temperature of the cold heat exchanger 152 are low, and before reverse voltage is input, the semiconductor cooling plate 155 is powered off for a period of time, so that residual cold of the cold heat exchanger 152 can be continuously transferred to the first storage compartment 110, the phenomenon that the input reverse voltage is too early and the defrosting control process of the cold heat exchanger 152 is prolonged is avoided, energy waste is caused, and energy consumption is increased.
The first evaporator 104 also has a frosting problem in the process of supplying cold to the second storage compartment 130, and the control method of the embodiment further provides a defrosting control mode of the first evaporator 104, and specifically, the control method further includes:
acquiring a trigger signal for starting defrosting of the first evaporator 104;
after receiving a trigger signal for starting defrosting of the first evaporator 104, executing a defrosting control process of the first evaporator 104;
the defrosting control process of the first evaporator 104 includes:
turning off the compressor 101, and after a second preset time, turning on the first heating device 170 to defrost the first evaporator 104;
when the temperature of the first evaporator 104 is greater than or equal to the fourth preset temperature, the first heating device 170 is turned off.
The refrigeration and freezing device 10 can determine the trigger time for the first evaporator 104 to turn on defrosting according to the accumulated refrigeration time of the first evaporator 104 and the accumulated door opening time of the second storage compartment 130, so as to defrost the first evaporator 104 in time and ensure the refrigeration efficiency.
In the defrosting process of the first evaporator 104, the compression refrigeration system and the semiconductor refrigeration system 150 need to be both in a closed state, and after the compressor 101 is closed, the first heating device 170 is started after a period of time, so that the second storage compartment 130 is continuously refrigerated by using the residual cold of the first evaporator 104, and the waste of energy caused by starting the first heating device 170 immediately after the compressor 101 is closed is avoided.
The frost layer is gradually melted as the temperature of the first evaporator 104 is gradually increased, and when the first evaporator 104 is increased to a certain temperature, the defrosting is substantially completed and the first heating device 170 should be timely turned off.
The control method of the present embodiment further defines the defrosting timing of the first evaporator 104 and the cold heat exchanger 152, and specifically, before executing the defrosting control process of the cold heat exchanger 152, the control method further includes:
when the trigger signal for starting the defrosting of the first evaporator 104 is received, the defrosting control process of the first evaporator 104 is executed first, and then the defrosting control process of the cold heat exchanger 152 is executed.
That is, when it is determined that both the cold heat exchanger 152 and the first evaporator 104 need to be turned on for defrosting, the defrosting control process of the cold heat exchanger 152 is not directly performed, but the defrosting control process of the first evaporator 104 is performed first, and then the defrosting control process of the cold heat exchanger 152 is performed.
Because the first evaporator 104 is located at the end of the compression refrigeration system, the compressor 101 needs to be in a shutdown state in the defrosting process of the first evaporator 104, and the heat dissipation of the hot end 153 in the semiconductor refrigeration system 150 needs to depend on the compression refrigeration system, when the compressor 101 is shutdown, the semiconductor refrigeration system 150 needs to be in a shutdown state because the first storage compartment 110 cannot be reduced to a set temperature, which causes that other compartments cannot be refrigerated in the defrosting process of the first evaporator 104; during defrosting of the cold heat exchanger 152, the cold generated by the hot end 153 is transferred to the refrigerant through the hot heat exchanger 151, and the compression refrigeration system can be in normal refrigeration control.
Therefore, when the first evaporator 104 and the cold heat exchanger 152 both need defrosting, the defrosting requirement of the first evaporator 104 needs to be preferentially ensured, and after the first evaporator 104 finishes defrosting, the cold heat exchanger 152 is defrosted, so that the refrigeration requirements of the second storage compartment 130 and the first storage compartment 110 can be considered, and the refrigeration effect is ensured.
As previously described, the compression refrigeration system may be in normal refrigeration control during defrosting of the cold heat exchanger 152. That is, the control method further includes: in performing the defrosting control of the cold heat exchanger 152, the compressor 101 may be turned on when the second storage compartment 130 needs to be cooled, so that cooling of the second storage compartment 130 is not affected.
Further, the control method may further include:
acquiring a trigger signal for starting defrosting of the second evaporator 103;
after receiving the trigger signal for turning on the defrosting of the second evaporator 103, when receiving the trigger signal for turning on the defrosting of the first evaporator 104, the defrosting control process of the first evaporator 104 is executed first, and then the defrosting control process of the second evaporator 103 is executed, so as to preferentially ensure the defrosting of the first evaporator 104.
Because the compressor 101 needs to be stopped when the first evaporator 104 defrosts, and the compressor 101 and the semiconductor refrigeration system 150 can be started according to the refrigeration requirements of the third storage compartment 120 and the first storage compartment 110 when the second evaporator 103 defrosts, and the compressor 101 can be started according to the refrigeration requirements of the second storage compartment 130 and the third storage compartment 120 when the cold heat exchanger 152 defrosts, the defrosting of the first evaporator 104 can be preferentially ensured, and the compressor 101 or the semiconductor refrigeration system 150 can be started according to the refrigeration requirements in the defrosting process of the second evaporator 103 or the cold heat exchanger 152, so that the refrigeration requirements of the storage compartments can be balanced, and the refrigeration efficiency can be improved.
Specifically, in the process of performing the defrosting control of the second evaporator 103, the switching valve 105 is controlled to connect the first outlet of the switching valve with the inlet of the first capillary 106, and the compressor 101 is turned on when the first storage compartment 110 needs to be refrigerated and/or the second storage compartment 130 needs to be refrigerated;
in the defrosting control process of the cold heat exchanger 152, when the second storage compartment 130 needs to be refrigerated and/or the third storage compartment 120 needs to be refrigerated, the compressor 101 is turned on, when the third storage compartment 120 needs to be refrigerated, the switching valve 105 is controlled to conduct the second outlet of the switching valve and the inlet of the second capillary 107, and when the second storage compartment 130 needs to be refrigerated, the switching valve 105 is controlled to conduct the first outlet of the switching valve and the inlet of the first capillary 106.
The defrosting control process of the second evaporator 103 may include:
turning on the second heating means 180;
judging whether the temperature of the second evaporator 103 is greater than or equal to a fifth preset temperature;
if so, the second heating device 180 is turned off.
Before the second heating device 180 is turned on, the defrosting control process of the second evaporator 103 may further include controlling the third fan 109 to operate at a preset rotation speed for a preset time, so as to preheat the second evaporator 103 by using the air in the third storage compartment 120, and meanwhile, the residual cooling of the second evaporator 103 is used to achieve an energy saving effect.
To more clearly understand the defrosting control method of the present embodiment, as shown in fig. 5, the present embodiment provides a flow of the defrosting control method of the refrigeration and freezing device 10, and specifically, the defrosting control method includes:
s502, respectively obtaining corresponding trigger signals for starting defrosting of the cold heat exchanger 152, the first evaporator 104 and the second evaporator 103;
s504, only receiving a trigger signal for starting defrosting of the cold heat exchanger 152, executing the first step, only receiving a trigger signal for starting defrosting of the first evaporator 104, executing the second step, only receiving a trigger signal for starting defrosting of the second evaporator 103, executing the third step, and executing the third step and/or the fourth step when receiving corresponding trigger signals for starting defrosting of the first evaporator 104, the second evaporator 103 and/or the cold heat exchanger 152.
Wherein, the defrosting control process of the cold heat exchanger 152 is shown in fig. 6, and the defrosting control process of the cold heat exchanger 152 specifically includes:
s602, controlling the compressor 101 and the switching valve 105 according to the refrigeration demands of the second storage compartment 130 and the third storage compartment 120;
s604, turning off the first fan 156, and inputting the maximum reverse voltage to the semiconductor chilling plate 155 after 5 min;
s606, detecting the temperature of the cold heat exchanger 152;
s608, when the temperature of the cold heat exchanger 152 is more than or equal to minus 5 ℃ and less than 1 ℃, adjusting the voltage input to the semiconductor refrigeration sheet 155 to be a rated reverse voltage;
s610, when the temperature of the cold heat exchanger 152 is more than or equal to 1 ℃ and less than 6 ℃, adjusting the voltage input to the semiconductor chilling plate 155 to be the minimum reverse voltage;
and S612, when the temperature of the cold heat exchanger 152 is greater than or equal to 6 ℃, closing the voltage.
Wherein, the second is a defrosting control process of the first evaporator 104, as shown in fig. 7, the defrosting control process of the first evaporator 104 specifically includes:
s702, the compressor 101 is closed, and the forward voltage input to the semiconductor chilling plate 155 is stopped;
s704, after 5min, starting the first heating device 170, and detecting the temperature of the first evaporator 104;
s706, when the temperature of the first evaporator 104 is greater than or equal to 6 ℃, the first heating device 170 is turned off.
Third, a defrosting control process of the second evaporator 103 is shown in fig. 8, and the defrosting control process of the second evaporator 103 specifically includes:
s802, the switching valve 105 is controlled to conduct the first outlet end of the switching valve and the inlet end of the first capillary 106, the compressor 101 is controlled according to the refrigeration requirements of the first storage chamber 110 and the second storage chamber 130, and the third fan 109 is controlled to operate at the minimum rotating speed;
s804, after 10min, starting the second heating device 180, and detecting the temperature of the second evaporator 103;
and S806, when the temperature of the second evaporator 103 is greater than or equal to 6 ℃, closing the second heating device 180.
In the defrosting control method of the embodiment, when the first evaporator 104 and the second evaporator 103 and/or the cold heat exchanger 152 need defrosting at the same time, defrosting of the first evaporator 104 is preferentially ensured, and the compressor 101 or the semiconductor refrigeration system 150 can be started according to refrigeration requirements in the defrosting process of the second evaporator 103 or the cold heat exchanger 152, so that the refrigeration requirements of the storage compartments are balanced, and the refrigeration efficiency is improved. In addition, in the control process of the cold heat exchanger 152, the reverse voltage value input to the semiconductor cooling plate 155 is dynamically adjusted according to the temperature of the cold heat exchanger 152, so that the defrosting requirement gradually changing in the defrosting process of the cold heat exchanger 152 can be adaptively matched with the input reverse voltage value, and the power consumption is reduced while the defrosting requirement of the cold heat exchanger 152 is met.
Based on the defrosting control method of any one of the foregoing embodiments, as shown in fig. 9, the refrigeration and freezing apparatus 10 of the present embodiment further includes a controller 160 having a memory 161 and a processor 162, and a computer program 1611 is stored in the memory 161, and the computer program 1611 is executed by the processor 162 to implement the defrosting control method of any one of the foregoing embodiments.
The processor 162 may be a Central Processing Unit (CPU), a digital processing unit, or the like. The processor 162 transceives data through the communication interface. The memory 161 is used for storing programs executed by the processor 162. The memory 161 is any medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer, or a combination of multiple memories 161. The computer program 1611 described above may be downloaded from a computer readable storage medium to a corresponding computing/processing device or to a computer or external storage device via a network, such as the internet, a local area network, a wide area network, and/or a wireless network.
The computer program 1611 may be executed entirely on the local computing device, as a stand-alone software package, partly on the local computing device and partly on a remote computing device, or entirely on a remote computing device or server (including a cloud-side device).
Thus, it should be appreciated by those skilled in the art that while various exemplary embodiments of the invention have been shown and described in detail herein, many other variations or modifications which are consistent with the principles of this invention may be determined or derived directly from the disclosure of the present invention without departing from the spirit and scope of the invention. Accordingly, the scope of the invention should be understood and interpreted to cover all such other variations or modifications.
Claims (11)
1. A defrosting control method of a refrigerating and freezing device comprises a first storage compartment and a semiconductor refrigerating system used for adjusting the temperature of the first storage compartment, wherein the semiconductor refrigerating system comprises a semiconductor refrigerating sheet with a hot end and a cold heat exchanger connected with the cold end, the cold heat exchanger is configured to provide cold for the first storage compartment, the hot end of the semiconductor refrigerating sheet is configured to release heat when a forward voltage is input to the semiconductor refrigerating sheet, the cold end of the semiconductor refrigerating sheet absorbs heat, the hot end of the semiconductor refrigerating sheet absorbs heat when a reverse voltage is input to the semiconductor refrigerating sheet, and the cold end of the semiconductor refrigerating sheet releases heat when the reverse voltage is input to the semiconductor refrigerating sheet;
the control method comprises the following steps:
acquiring a trigger signal for starting defrosting of the cold heat exchanger;
after receiving a trigger signal for starting defrosting of the cold heat exchanger, executing a defrosting control process of the cold heat exchanger;
the defrosting control process of the cold heat exchanger comprises the following steps:
inputting a first reverse voltage to the semiconductor refrigeration chip;
detecting a temperature of the cold heat exchanger;
and dynamically adjusting the reverse voltage value input to the semiconductor refrigerating sheet according to the temperature of the cold heat exchanger.
2. The defrosting control method of claim 1, further comprising, before the step of inputting the first reverse voltage to the semiconductor chilling plate:
detecting the power-on state of the semiconductor refrigerating sheet;
and powering off the semiconductor chilling plate which is in forward voltage operation for a first preset time.
3. The defrosting control method according to claim 1, wherein the step of dynamically adjusting the reverse voltage value input to the semiconductor chilling plate according to the temperature of the cold heat exchanger comprises:
when the temperature of the cold heat exchanger is greater than or equal to a first preset temperature and less than a second preset temperature, inputting a second reverse voltage which is less than the first reverse voltage to the semiconductor refrigeration sheet;
when the temperature of the cold heat exchanger is greater than or equal to the second preset temperature and less than a third preset temperature, inputting a third reverse voltage which is less than the second reverse voltage to the semiconductor refrigeration sheet;
and when the temperature of the cold heat exchanger is greater than or equal to the third preset temperature, stopping inputting voltage to the semiconductor chilling plate.
4. The defrosting control method according to claim 1, wherein
The semiconductor refrigeration system also comprises a hot heat exchanger connected with the hot end to dissipate heat of the hot end;
the refrigeration and freezing device further comprises a second storage chamber, a compressor, a first capillary tube, a first evaporator and a first heating device for defrosting the first evaporator, wherein the first evaporator is configured to provide cold energy for the second storage chamber, and the heat exchanger is arranged between the outlet end of the first capillary tube and the inlet end of the first evaporator, so that a refrigerant flows through the heat exchanger to dissipate heat of the hot end, and the first storage chamber is lowered to a cryogenic temperature lower than that of the second storage chamber;
the control method further comprises the following steps:
acquiring a trigger signal for starting defrosting of the first evaporator;
executing a defrosting control process of the first evaporator after receiving a triggering signal for starting defrosting of the first evaporator;
the defrosting control process of the first evaporator includes:
turning off the compressor, and after a second preset time, turning on the first heating device to defrost the first evaporator;
and when the temperature of the first evaporator is greater than or equal to a fourth preset temperature, closing the first heating device.
5. The defrosting control method according to claim 4, further comprising, before performing the defrosting control process of the cold heat exchanger:
when a trigger signal for starting defrosting of the first evaporator is received, a defrosting control process of the first evaporator is executed firstly, and then a defrosting control process of the cold heat exchanger is executed;
and, the control method further comprises:
and in the defrosting control process of the cold heat exchanger, when the second storage chamber needs to be refrigerated, the compressor is started.
6. The defrosting control method according to claim 5, wherein
The cold storage and refrigeration device also comprises a third storage chamber and a second evaporator, the second evaporator is configured to provide cold energy for the third storage chamber, and the outlet end of the second evaporator is communicated with the inlet end of the hot heat exchanger;
the control method further comprises the following steps:
acquiring a trigger signal for starting defrosting of the second evaporator;
after the trigger signal for starting defrosting of the second evaporator is received, when the trigger signal for starting defrosting of the first evaporator is received, the defrosting control process of the first evaporator is executed firstly, and then the defrosting control process of the second evaporator is executed.
7. The defrosting control method according to claim 6, wherein
The refrigerating and freezing device further comprises a second capillary tube, a condenser and a switching valve, wherein the inlet end of the switching valve is communicated with the outlet end of the condenser, the first outlet end of the switching valve is connected with the inlet end of the first capillary tube, the second outlet end of the switching valve is connected with the inlet end of the second capillary tube, and the inlet end of the second evaporator is connected with the outlet end of the second capillary tube;
the control method further comprises the following steps:
in the defrosting control process of the second evaporator, the switching valve is controlled to conduct the first outlet end of the switching valve and the inlet end of the first capillary, and the compressor is started when the first storage chamber needs to be refrigerated and/or the second storage chamber needs to be refrigerated;
in the defrosting control process of the cold heat exchanger, when the second storage chamber needs to be refrigerated and/or the third storage chamber needs to be refrigerated, the compressor is started, when the third storage chamber needs to be refrigerated, the switching valve is controlled to conduct the second outlet end of the switching valve and the inlet end of the second capillary tube, and when the second storage chamber needs to be refrigerated, the switching valve is controlled to conduct the first outlet end of the switching valve and the inlet end of the first capillary tube.
8. The defrosting control method of claim 6, wherein the refrigerating and freezing device further comprises a second heating device for defrosting the second evaporator;
the defrosting control process of the second evaporator includes:
turning on the second heating device;
judging whether the temperature of the second evaporator is greater than or equal to a fifth preset temperature or not;
if yes, the second heating device is closed.
9. A refrigeration chiller comprising:
the refrigerator comprises a refrigerator body, a first storage chamber and a second storage chamber, wherein the first storage chamber is defined in the refrigerator body;
the semiconductor refrigeration system comprises a semiconductor refrigeration piece with a hot end and a cold end, and a cold heat exchanger connected with the cold end, wherein the cold heat exchanger is configured to provide cold for the first storage compartment, the semiconductor refrigeration piece is configured to release heat at the hot end when being electrified with forward voltage, the cold end absorbs heat, and the hot end absorbs heat and the cold end releases heat when being electrified with reverse voltage;
a controller having a memory and a processor, and a computer program stored in the memory, the computer program being executable by the processor to implement a defrost control method for a refrigeration freezer as claimed in any one of claims 1 to 8.
10. A refrigerator-freezer according to claim 9, wherein the freezer is a refrigerator-freezer
The semiconductor refrigeration system also comprises a hot heat exchanger connected with the hot end so as to dissipate heat of the hot end;
the refrigerator body is also limited with a second storage compartment, and the refrigerating and freezing device also comprises a compressor, a first capillary tube, a first evaporator and a first heating device for defrosting the first evaporator;
the first evaporator is configured to provide cold energy for the second storage chamber, and the heat exchanger is arranged between the outlet end of the first capillary tube and the inlet end of the first evaporator, so that a refrigerant flows through the heat exchanger to dissipate heat of the hot end, and the first storage chamber is reduced to a cryogenic temperature lower than that of the second storage chamber.
11. A refrigerator freezer according to claim 10 wherein the freezer is arranged to cool air from the freezer
The box body is also provided with a third storage compartment;
the refrigeration and freezing device also comprises a second evaporator, a second capillary tube, a condenser, a switching valve and a second heating device for defrosting the second evaporator;
the second evaporator is configured to provide cold energy to the third storage compartment, the inlet end of the second evaporator is connected with the outlet end of the second capillary tube, the outlet end of the second evaporator is communicated with the inlet end of the heat exchanger, the inlet end of the switching valve is communicated with the outlet end of the condenser, the first outlet end of the switching valve is connected with the inlet end of the first capillary tube, and the second outlet end of the switching valve is connected with the inlet end of the second capillary tube.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287112.XA CN115111871A (en) | 2021-03-17 | 2021-03-17 | Refrigerating and freezing device and defrosting control method thereof |
| PCT/CN2022/071766 WO2022193807A1 (en) | 2021-03-17 | 2022-01-13 | Refrigerating and freezing apparatus and defrosting control method therefor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110287112.XA CN115111871A (en) | 2021-03-17 | 2021-03-17 | Refrigerating and freezing device and defrosting control method thereof |
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| CN115111871A true CN115111871A (en) | 2022-09-27 |
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| CN202110287112.XA Pending CN115111871A (en) | 2021-03-17 | 2021-03-17 | Refrigerating and freezing device and defrosting control method thereof |
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| WO (1) | WO2022193807A1 (en) |
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| WO2024082246A1 (en) * | 2022-10-20 | 2024-04-25 | 深圳市虎一科技有限公司 | Cooking apparatus and defrosting method thereof |
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| CN106403442A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔智能技术研发有限公司 | Refrigerator and defrosting method thereof |
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| CN111550964A (en) * | 2020-04-29 | 2020-08-18 | 珠海格力电器股份有限公司 | Defrosting method, refrigeration equipment, defrosting control method and commercial refrigeration unit |
| KR20200105288A (en) * | 2019-02-28 | 2020-09-07 | 엘지전자 주식회사 | Control method for refrigerator |
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2021
- 2021-03-17 CN CN202110287112.XA patent/CN115111871A/en active Pending
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| JP2000065463A (en) * | 1998-08-25 | 2000-03-03 | Fujitsu General Ltd | Freezing refrigerator |
| CN106403442A (en) * | 2015-07-31 | 2017-02-15 | 青岛海尔智能技术研发有限公司 | Refrigerator and defrosting method thereof |
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| KR20200105288A (en) * | 2019-02-28 | 2020-09-07 | 엘지전자 주식회사 | Control method for refrigerator |
| CN211084550U (en) * | 2019-09-29 | 2020-07-24 | 青岛海尔电冰箱有限公司 | Refrigerator with a door |
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