CN113701444A - Control method of refrigerating and freezing device - Google Patents
Control method of refrigerating and freezing device Download PDFInfo
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- CN113701444A CN113701444A CN202010442900.7A CN202010442900A CN113701444A CN 113701444 A CN113701444 A CN 113701444A CN 202010442900 A CN202010442900 A CN 202010442900A CN 113701444 A CN113701444 A CN 113701444A
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- defrosting
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- 238000000034 method Methods 0.000 title claims abstract description 61
- 238000007710 freezing Methods 0.000 title claims abstract description 49
- 230000008014 freezing Effects 0.000 title claims abstract description 49
- 239000003570 air Substances 0.000 claims abstract description 148
- 238000010257 thawing Methods 0.000 claims abstract description 88
- 238000001816 cooling Methods 0.000 claims abstract description 68
- 238000003860 storage Methods 0.000 claims abstract description 31
- 239000012080 ambient air Substances 0.000 claims abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 31
- 238000005057 refrigeration Methods 0.000 claims description 26
- 238000004321 preservation Methods 0.000 claims description 13
- 230000000903 blocking effect Effects 0.000 claims description 5
- 230000000873 masking effect Effects 0.000 claims description 5
- 230000003020 moisturizing effect Effects 0.000 claims description 3
- 238000007599 discharging Methods 0.000 claims description 2
- 238000005265 energy consumption Methods 0.000 abstract description 8
- 230000000694 effects Effects 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000004891 communication Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003213 activating effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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Classifications
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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
-
- 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
-
- 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
- F25D17/00—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces
- F25D17/04—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection
- F25D17/06—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation
- F25D17/062—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators
- F25D17/065—Arrangements for circulating cooling fluids; Arrangements for circulating gas, e.g. air, within refrigerated spaces for circulating air, e.g. by convection by forced circulation in household refrigerators with 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
- F25D21/002—Defroster control
- F25D21/008—Defroster control by timer
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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
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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
-
- 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
- F25D21/14—Collecting or removing condensed and defrost water; Drip trays
-
- 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
- F25D2317/00—Details or arrangements for circulating cooling fluids; Details or arrangements for circulating gas, e.g. air, within refrigerated spaces, not provided for in other groups of this subclass
- F25D2317/04—Treating air flowing to refrigeration compartments
- F25D2317/041—Treating air flowing to refrigeration compartments by purification
- F25D2317/0413—Treating air flowing to refrigeration compartments by purification by humidification
- F25D2317/04131—Control means therefor
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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
- F25D2600/02—Timing
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Cold Air Circulating Systems And Constructional Details In Refrigerators (AREA)
Abstract
The invention relates to a control method of a refrigerating and freezing device, the refrigerating and freezing device comprises a box body which is limited with a cooling chamber and a storage chamber, an evaporator which is arranged in the cooling chamber and is used for providing cold energy for the storage chamber, and an air guide pipe which is communicated with the cooling chamber and the external environment space of the box body, wherein a fan is arranged in the air guide pipe, and the control method comprises the following steps: receiving a first trigger signal for indicating the fan to rotate reversely, wherein the first trigger signal is generated when the evaporator starts defrosting or is generated after the evaporator starts defrosting for a first preset time, and the first preset time is less than the total defrosting time of the evaporator; and the fan is controlled to rotate reversely, so that the ambient air in the external environment space of the box body flows to the cooling chamber through the air guide pipe, the evaporator is defrosted by the ambient air, the defrosting efficiency of the evaporator is improved, the energy consumption caused by defrosting of the refrigerating and freezing device is reduced, and the refrigerating and freezing device is simple in structure.
Description
Technical Field
The invention relates to a refrigeration and freezing technology, in particular to a control method of a refrigeration and freezing device.
Background
At present, the air-cooled refrigerator generally adopts a mode of arranging a defrosting heater below an evaporator to defrost the evaporator. The evaporator is defrosted only by the heat generated by the defrosting heater, the defrosting efficiency is limited to a certain extent, and the energy consumption generated by the defrosting heater is higher.
Disclosure of Invention
It is an object of the present invention to overcome at least one of the drawbacks of the prior art and to provide a control method for a refrigeration and freezing apparatus with high defrosting efficiency and low energy consumption.
A further object of the invention is to reduce the effect of the defrosting operation of the evaporator on the temperature in the storage compartment, further reducing the energy consumption.
It is another further object of the present invention to improve the efficiency and uniformity of evaporator defrosting.
In order to achieve the above object, the present invention provides a method for controlling a refrigerating and freezing apparatus, the refrigerating and freezing apparatus including a box body defining a cooling chamber and a storage compartment, an evaporator provided in the cooling chamber for supplying cooling energy into the storage compartment, and an air duct communicating the cooling chamber with an external environmental space in which the box body is located, the air duct being provided with a fan therein, the method comprising:
receiving a first trigger signal for indicating the fan to reversely rotate, wherein the first trigger signal is generated when the evaporator starts defrosting or is generated after the evaporator starts defrosting for a first preset time, and the first preset time is less than the total defrosting time of the evaporator; and
and controlling the fan to rotate reversely so as to enable the ambient air in the external environment space of the box body to flow to the cooling chamber through the air guide pipe, so that the evaporator is defrosted by the ambient air.
Optionally, a controllable shielding mechanism for selectively blocking and/or conducting the air guide pipe is further arranged at the air guide pipe; and is
After receiving the first trigger signal and before controlling the fan to reverse, the control method further includes: and opening the controllable shielding mechanism to conduct the air guide pipe.
Optionally, the control method further includes:
receiving a second trigger signal for indicating the end of defrosting of the evaporator;
and controlling the fan to rotate positively to promote the air in the cooling chamber to flow to the external environment space where the box body is located through the air guide pipe, so as to discharge heat generated when the evaporator is defrosted.
Optionally, after controlling the fan to rotate forward, the control method further includes:
judging whether the forward rotation time of the fan reaches a second preset time;
if yes, the fan is stopped.
Optionally, the control method further includes:
outputting a first fault prompt signal for indicating that the fan is in fault when any one of the following conditions is met:
detecting that the fan is not started within a third preset time after the fan is controlled to reversely rotate;
detecting that the fan stops or still rotates reversely within a fourth preset time after the fan is controlled to rotate forwardly;
detecting that the fan is not stopped within a fifth preset time after the fan is stopped; wherein
The third preset time length, the fourth preset time length and the fifth preset time length are equal or different.
Optionally, a controllable shielding mechanism for selectively blocking and/or conducting the air guide pipe is further arranged at the air guide pipe; and is
After receiving the first trigger signal and before controlling the fan to reverse, the control method further includes: opening the controllable shielding mechanism to conduct the air guide pipe;
after stopping the fan, the control method further includes: and closing the controllable shielding mechanism to block the air guide pipe.
Optionally, the control method further includes:
outputting a second fault indication signal for indicating that the controllable masking mechanism is faulty when any of the following conditions is met:
detecting that the controllable shielding mechanism is not opened within a sixth preset time after the controllable shielding mechanism is opened;
detecting that the controllable shielding mechanism is not closed within a seventh preset time period after the controllable shielding mechanism is closed; wherein
The sixth preset time period and the seventh preset time period are equal or different.
Optionally, the refrigeration and freezing device further comprises a defrosting heater disposed adjacently below the evaporator, and the starting end of the air guide pipe located in the cooling chamber is located below the defrosting heater; and is
If the first trigger signal is generated when the evaporator starts defrosting, the control method further comprises starting the defrosting heater after receiving the first trigger signal.
Optionally, the storage compartment is a refrigeration compartment, a moisture preservation drawer is arranged in the storage compartment, an air supply outlet communicated with the cooling chamber is formed in the rear side of the moisture preservation drawer, and an air supply air door is arranged at the air supply outlet; after controlling the fan to reverse, the control method further comprises:
detecting the humidity in the moisturizing drawer;
when humidity in the moisture preservation drawer is less than a first preset humidity threshold value, the air supply air door is controlled to be opened the air supply outlet to allow air in the cooling chamber to flow into through the air supply outlet the moisture preservation drawer is right space in the moisture preservation drawer is humidified until the air supply air door is controlled to be closed when the humidity in the moisture preservation drawer is greater than a second preset humidity threshold value, and the second preset humidity threshold value is greater than the first preset humidity threshold value.
Optionally, the refrigeration and freezing device further comprises a drain pipe mutually independent from the air guide pipe, the drain pipe extends from the cooling chamber to the outside of the box body and is used for discharging defrosting water generated by defrosting of the evaporator, the tail ends of the air guide pipe and the drain pipe, which extend outwards from the box body, are both located in a compressor bin of the refrigeration and freezing device, and a compressor and a water pan for collecting the defrosting water are arranged in the compressor bin.
The refrigerating and freezing device comprises an air guide pipe extending from a cooling chamber to the outside of a box body, and a fan is arranged in the air guide pipe. According to the control method, after the evaporator starts defrosting or starts defrosting for a period of time and before defrosting is finished, the fan is controlled to rotate reversely, and ambient air with higher temperature outside the box body can be made to flow to the cooling chamber through the air guide pipe, so that the evaporator is defrosted by the ambient air. Moreover, the structure of the box body of the existing refrigerating and freezing device is not required to be greatly changed, and only an air guide pipe is required to be added according to the assembly mode of the drain pipe of the traditional refrigerator, so that the structure of the refrigerating and freezing device is simplified.
Furthermore, when a second trigger signal for indicating the defrosting end of the evaporator is received, the fan is controlled to rotate in the positive direction, hot air generated in the cooling chamber due to defrosting of the evaporator can be discharged to the outside of the box body through the air guide pipe, and then dissipated to the environment space, and the influence of the defrosting operation of the evaporator on the temperature in the storage room is reduced. After the defrosting of the evaporator is finished, when the storage chamber is refrigerated again, the temperature in the storage chamber can be recovered to the temperature before the defrosting in a short time, so that the energy consumption of the refrigerating and freezing device is further reduced.
Furthermore, the refrigerating and freezing device also comprises a defrosting heater which is positioned below the evaporator and above the air guide pipe, when the evaporator starts defrosting, the defrosting heater is started, and the evaporator can be defrosted quickly by using the heat generated by the defrosting heater. Meanwhile, when the fan rotates reversely, the air flow sent into the cooling chamber through the air guide pipe can be promoted to flow through the defrosting heater and then flow through the evaporator, so that the heat generated by the defrosting heater can be conveniently and uniformly and quickly blown to the evaporator, the defrosting efficiency and uniformity of the evaporator are further improved, and the problems of quick defrosting at the lower part and slow defrosting at the upper part of the evaporator are solved.
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 illustration and not 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:
figure 1 is a schematic side view of a refrigerated freezer according to one embodiment of the invention;
figure 2 is a schematic front perspective view of a refrigerated freezer according to one embodiment of the invention;
FIG. 3 is a schematic block diagram of a duct according to an embodiment of the present invention in a closed position;
fig. 4 is a schematic flow chart of a method of controlling a refrigeration chiller according to one embodiment of the present invention;
FIG. 5 is a schematic flow chart diagram of a refrigeration chiller control method according to another embodiment of the present invention;
fig. 6 is a schematic flow diagram of a refrigeration chiller control method according to yet another embodiment of the present invention;
fig. 7 is a schematic flow chart of a method of controlling a refrigeration chiller according to yet another embodiment of the present invention;
fig. 8 is a schematic flow chart of a method of controlling a refrigeration chiller according to yet another embodiment of the present invention.
Detailed Description
Fig. 1 is a schematic side view of a refrigerator-freezer according to an embodiment of the present invention, and fig. 2 is a schematic front perspective view of the refrigerator-freezer according to an embodiment of the present invention. Referring to fig. 1 and 2, a refrigerating and freezing apparatus 1 according to the present invention includes a box 10. The cabinet 10 defines therein a cooling chamber 130 and a storage compartment 110 for storing articles. In the embodiment shown in fig. 1, the number of storage compartments 110 is one. In other embodiments, the number of storage compartments 110 may be two or more than three. Specifically, the container body 10 may include an inner container and an outer container, and an insulating layer is formed between the inner container and the outer container to insulate heat between the inside and the outside of the container body, so that the storage compartment 110 can maintain a low-temperature storage environment. The enclosure may include side panels on either side of the refrigerator-freezer 1, a bottom steel at the bottom of the refrigerator-freezer 1, and a back panel at the rear of the refrigerator-freezer 1. The refrigerating and freezing device 1 further comprises an evaporator 20, and the evaporator 20 is arranged in the cooling chamber 130 and is used for providing cold energy for the storage compartment 110. The evaporator 20 cools the air flowing from the storage compartment into the cooling chamber 130, and forms a cooling airflow to be supplied to the storage compartment 110. The refrigerating and freezing device 1 may further include a blower fan disposed in the cooling compartment 130 to promote circulation of air between the storage compartment and the cooling compartment 130.
Further, the refrigerating and freezing device 1 further includes an air duct 40 communicating the cooling chamber 130 with the external environment space of the cabinet 10, and fig. 3 is a schematic structural view of the air duct in a closed state according to an embodiment of the present invention. The air duct 40 extends from the cooling chamber 130 to the outside of the cabinet 10, and a fan 43 is provided inside the air duct 40. The fan 43 may rotate in the forward direction or in the reverse direction. When the fan 43 rotates forward, the air in the cooling chamber 130 can be discharged out of the cabinet 10 through the air guiding duct 40, and when the fan 43 rotates backward, the air outside the cabinet 10 can be driven to flow into the cooling chamber 130 through the air guiding duct 40.
Fig. 4 is a schematic flow chart of a control method of a refrigerating and freezing apparatus according to an embodiment of the present invention, which is suitable for a storage compartment with a storage temperature above 0 degrees, such as a so-called refrigerating compartment, a temperature-changing compartment with a temperature above 0 degrees, a fresh-keeping compartment, and the like; the control method of the present invention is also applicable to a storage compartment having a storage temperature of 0 ℃ or lower, such as a freezing compartment, a variable temperature compartment having a temperature of 0 ℃ or lower, and the like.
The control method of the refrigeration and freezing device comprises the following steps:
step S102, a first trigger signal for instructing the fan 43 to reverse is received. The first trigger signal is generated when the evaporator 20 starts defrosting or after the evaporator 20 starts defrosting for a first preset time period, and the first preset time period is less than the total defrosting time period of the evaporator 20. That is, the first trigger signal may be generated when the evaporator 20 starts defrosting, or may be generated during defrosting of the evaporator 20 (before defrosting is finished).
In step S104, the fan 43 is controlled to rotate reversely to promote the ambient air in the external ambient space of the box 10 to flow to the cooling chamber 130 through the air duct 40, so as to defrost the evaporator 20 with the ambient air.
It will be understood by those skilled in the art that the refrigerating and freezing device 1 may be used to air defrost the evaporator 20 in the cooling chamber 130 with only the above-mentioned ambient air, or may be used to defrost the evaporator 20 in combination with other defrosting devices of the refrigerating and freezing device 1, such as the defrosting heater 70 mentioned in the following embodiments.
The refrigerating and freezing apparatus 1 of the present invention includes an air guide duct 40 extending from the cooling chamber 130 to the outside of the cabinet 10, and a fan 43 is provided in the air guide duct 40. According to the control method, after the evaporator 20 starts defrosting or starts defrosting for a period of time and before defrosting is finished, the fan 43 is controlled to rotate reversely, so that high-temperature ambient air outside the box body 10 (the temperature of the ambient air is higher than that in the refrigerating and freezing device) can be forced to flow to the cooling chamber 130 through the air guide pipe 43, the evaporator 20 is defrosted by the ambient air, defrosting efficiency of the evaporator 20 is improved, and compared with a mode that the refrigerating and freezing device 1 is defrosted only by devices with high energy consumption, such as a heating device and the like, energy consumption generated by defrosting of the refrigerating and freezing device 1 is reduced. Moreover, the structure of the box body of the existing refrigerating and freezing device is not required to be greatly changed, and only an air guide pipe is required to be added according to the assembly mode of the drain pipe of the traditional refrigerator, so that the structure of the refrigerating and freezing device is simplified.
In other embodiments, a controllable shielding mechanism 45 for selectively blocking and/or conducting the air duct 40 is further disposed at the air duct 40. In these embodiments, after receiving the first trigger signal and before controlling the fan 43 to reverse, the control method of the present invention further includes: the controllable shutter mechanism 45 is opened to open the air duct 40. For example, in the schematic flowchart of the refrigeration freezer control method according to another embodiment shown in fig. 5, after step S102 and before step S104, the control method of the present invention further includes step S103: the controllable shutter mechanism 45 is opened to open the air duct 40.
Fig. 6 is a schematic flow chart of a method of controlling a refrigeration chiller according to yet another embodiment of the present invention. In some embodiments, the control method of the present invention further comprises:
step S105, receiving a second trigger signal for indicating the end of defrosting of evaporator 20;
step S106, the fan 43 is controlled to rotate forward to force the air in the cooling chamber 130 to flow to the external environment space of the cabinet 10 through the air duct 40, so as to discharge the heat generated by defrosting the evaporator 20.
That is, after defrosting of the evaporator 20 is completed, the heat generated when defrosting of the evaporator 20 is performed can be discharged out of the refrigerating and freezing device 1 by controlling the fan 43 to rotate forward. Thereby, the influence of the defrosting operation of the evaporator 20 on the temperature inside the storage compartment 110 is reduced. When the evaporator 20 finishes defrosting and the compartment 110 is cooled again, the temperature in the compartment 110 can be returned to the temperature before defrosting in a short time, and the energy consumption of the refrigerating and freezing device 1 can be further reduced.
Fig. 7 is a schematic flow chart of a method of controlling a refrigeration chiller according to yet another embodiment of the present invention. Further, after controlling the fan 43 to rotate forward, the control method of the present invention further includes:
step S107, judging whether the forward rotation time of the fan 43 reaches a second preset time; if yes, go to step S108;
step S108, the blower 43 is stopped.
When the forward rotation time of the fan 43 reaches the second preset time, the heat generated by the evaporator 20 can be basically exhausted. At this time, the rotation of fan 43 is stopped, and evaporator 20 resumes cooling.
Further, after stopping the fan 43, the control method of the present invention further includes step S111: the controllable shielding mechanism 45 is closed to block the air duct 40. Therefore, the cooling capacity in the cooling chamber 130 can be prevented from leaking to the outside through the air duct 40 when the fan 43 does not need to operate.
In particular, the controllable shielding mechanism 45 may be a shutter disposed outside the port of the distal end 42 of the air duct 40 and pivotally connected to the fan 43 to selectively shield and/or uncover the port of the distal end 42 of the air duct 40. When the shielding plate shields the end 42 of the air guide pipe 40, the communication between the air guide pipe 40 and the environment space is blocked, and when the end 42 of the air guide pipe 40 is opened, the communication between the air guide pipe 40 and the environment space is conducted. Further, a sealing element 46 is arranged on the inner side of the controllable shielding mechanism 45 facing the fan 43, so that when the controllable shielding mechanism 45 shields the end port of the air guide pipe 40, effective sealing between the controllable shielding mechanism 45 and the end port of the air guide pipe 40 is realized through the sealing element 46, the sealing between the controllable shielding mechanism 45 and the end port of the air guide pipe 40 is further enhanced, and the cold loss of the refrigerating and freezing device 1 is thoroughly avoided. In some alternative embodiments, the controllable shielding mechanism 45 may also be a controllable damper disposed inside the air duct 40. Further, a waterproof and air-permeable member 47 may be further disposed inside the starting end 41 of the air guiding pipe 40 to prevent the frost generated by the evaporator 20 from dropping on the starting end 41 of the air guiding pipe 40 and flowing toward the air guiding pipe 40. The waterproof breathable member 47 may be a waterproof breathable film or a waterproof breathable net, for example.
In some embodiments, the inner diameter of the beginning 41 of the air guide duct 40 communicating with the cooling chamber 130 gradually increases outwardly along the axial direction of the air guide duct 40. That is, the upper starting end 41 of the air guiding pipe 40 is gradually enlarged from bottom to top, so that the cross-sectional area of the air flowing out from the air guiding pipe 40 can be increased, the contact area between the air and the evaporator 20 is increased, and the defrosting uniformity of the evaporator 20 is further improved.
In some embodiments, the inner diameter of the end 42 of the duct 40 that extends outwardly of the case 10 gradually increases axially outwardly of the duct 40. That is to say, the lower end 42 of the air duct 40 is gradually enlarged from top to bottom, and the area of the port of the end 42 is increased, so that the air inlet area of the air duct 40 is enlarged when the fan 43 rotates in the reverse direction, and the air inlet amount and the auxiliary defrosting effect are improved.
The structure that the two ends of the air guide pipe 40 are thick and the middle part of the air guide pipe 40 is thin can ensure that the inner diameter of the part of the air guide pipe 40 in the heat insulation layer of the box body is small, so that the influence of the air guide pipe 40 on the heat insulation performance of the box body is reduced as much as possible.
In some embodiments, the control method of the present invention further comprises: outputting a first fault prompt signal for indicating that the fan 43 is in fault when any one of the following conditions is met:
detecting that the fan 43 is not started within a third preset time after the fan 43 is controlled to reversely rotate;
detecting that the fan 43 stops or still rotates reversely within a fourth preset time after controlling the fan 43 to rotate forwardly;
the non-stop of the blower 43 is detected within a fifth preset time period after the stop of the blower 43.
The third preset time period, the fourth preset time period and the fifth preset time period may be equal or different.
In some embodiments, the control method of the present invention further comprises: outputting a second failure indication signal for indicating that the controllable masking mechanism 45 is failed when any of the following conditions is satisfied:
detecting that the controllable shielding mechanism 45 is not opened within a sixth preset time period after the controllable shielding mechanism 45 is opened;
the non-closing of the controllable masking mechanism 45 is detected for a seventh preset period of time after the closing of the controllable masking mechanism 45.
The sixth preset duration and the seventh preset duration may be equal or different.
In some embodiments, the refrigerating and freezing apparatus 1 further includes a defrost heater 70 disposed adjacently below the evaporator 20, and the starting end of the air guide duct 40 located in the cooling chamber 130 is located below the defrost heater 70. When the first trigger signal is generated when the evaporator 20 starts defrosting, the control method of the present invention further includes activating the defrosting heater 70 after receiving the first trigger signal. Thus, the evaporator 20 can be defrosted quickly by the heat generated by the defrosting heater 70. Meanwhile, when the fan 43 rotates reversely, the airflow sent into the cooling chamber 130 through the air guide pipe 43 can be prompted to flow through the defrosting heater 70 and then flow through the evaporator 20, so that the heat generated by the defrosting heater 70 can be conveniently and uniformly and rapidly blown to the evaporator 20, the defrosting efficiency and uniformity of the evaporator 20 are further improved, and the problems of rapid defrosting at the lower part and slow defrosting at the upper part of the evaporator 20 are avoided.
In some embodiments, when the storage compartment 110 is a refrigerating compartment, a moisture preserving drawer 111 may be disposed therein, an air supply outlet 112 communicating with the cooling compartment 130 is opened at a rear side of the moisture preserving drawer 111, and an air supply damper 113 is disposed at the air supply outlet 112. Fig. 8 is a schematic flow chart of a method of controlling a refrigeration chiller according to yet another embodiment of the present invention. After controlling the fan 43 to rotate reversely, the control method of the present invention further includes:
step S109, detecting the humidity in the moisture preservation drawer 111;
step S110, when the humidity in the moisture preserving drawer 111 is smaller than the first preset humidity threshold, controlling the air supply damper 113 to open the air supply opening 112, so as to allow the air in the cooling chamber 130 to flow into the moisture preserving drawer 111 through the air supply opening 112 to humidify the space in the moisture preserving drawer 111, and controlling the air supply damper 113 to close the air supply opening 112 until the humidity in the moisture preserving drawer 111 is greater than the second preset humidity threshold. Wherein the second predetermined humidity threshold is greater than the first predetermined humidity threshold. Specifically, the first preset humidity threshold and the second preset humidity threshold may be relative humidity values preset in the refrigeration and freezing device, for example, the first preset humidity threshold may be any humidity value between 50% and 70%, and the second preset humidity threshold may be any humidity value between 85% and 95%.
It is understood that in some embodiments, the control method of the present invention may include the above steps S101 to S111 at the same time, and at this time, the steps S109 and S110 may occur between the steps S104 and S105.
In some embodiments, the refrigerating and freezing device 1 further includes a drain pipe 80 independent from the air duct 40, the drain pipe 80 extends from the cooling chamber 130 to the outside of the box body 10 for draining the defrosting water generated by defrosting the evaporator 20, the ends of the air duct 40 and the drain pipe 80 extending to the outside of the box body 10 are both located in a compressor compartment 140 of the refrigerating and freezing device 1, and the compressor compartment 140 is provided with a compressor 50 and a water pan 60 for collecting the defrosting water. Because the compressor bin 140 is communicated with the environmental space, and the compressor 50 and other components with larger heat generation quantity are arranged in the compressor bin 140, the temperature in the compressor bin is usually higher, and the defrosting water in the water pan 60 can be promoted to evaporate, so that the environmental humidity in the compressor bin 140 is higher. That is, both the temperature and the humidity within the compressor bin 140 are relatively high. This application extends to in the compressor storehouse 140 with terminal 42 of guide duct 40, not only can control the fan 43 reversal when evaporimeter 20 defrosts and make the higher ambient air of temperature in the compressor storehouse 140 get into supplementary evaporimeter 20 defrosting in the cooling chamber 130 through the guide duct 40, evaporator 20's defrosting effect has further been improved, and can also control the fan 43 reversal when needing to humidify in the storing room 110 and make the higher air current of humidity carry to the cooling chamber 130, thereby moisture in the air current is sent to storing room 110 along with cooling air current, the humidity in the storing space 110 has been improved fast, the efficiency of moisturizing and the effect of cold-stored refrigeration device 1 have been improved.
Specifically, the water tray 60 may be disposed above the compressor 50 to accelerate evaporation of the defrosted water collected in the water tray 60 by using heat generated when the compressor 50 operates. In other embodiments, the position of the water receiving tray 60 is not limited to above the compressor 50, for example, the water receiving tray 60 may be located beside the compressor 50 to drain or evaporate the defrosted water collected in the water receiving tray 60 in other manners.
Further, the compressor bin 140 may be located below the cooling chamber 130, with both the air deflection conduit 40 and the water discharge conduit 80 extending downward from the cooling chamber 130. Because the air guide pipe 40 and the water drain pipe 80 are independent, the structure of the water drain pipe of the existing refrigerating and freezing device 1 does not need to be changed, only one air guide pipe 40 needs to be added, the cost is low, and the structure is very simple.
Specifically, both the air guide duct 40 and the water discharge duct 80 extend vertically downward from the cooling compartment 130. In some alternative embodiments, the air duct 40 and the water discharge duct 80 may also extend obliquely downward from the cooling chamber 130.
In some embodiments, the bottom wall 132 of the cooling chamber 130 includes a plurality of inclined surfaces extending obliquely downward from the circumferential edge thereof toward the middle thereof, and a drain opening 131 is formed at the intersection or lowest end of the plurality of inclined surfaces, so that the defrosted water generated by the evaporator 20 converges along the plurality of inclined surfaces to the drain opening 131 to be discharged out of the cooling chamber 130 through the drain opening 131. The upper end of the drain pipe 80 is communicated with the drain port 131, so that the defrosting water discharged from the drain port 131 can be guided to the water receiving tray 60.
Specifically, the bottom wall 132 of the cooling chamber 130 may be a tapered slope, the lowest end of which forms the drain 131. The bottom wall 132 of the cooling chamber 130 may also include two or more inclined surfaces extending obliquely downward from the periphery of the bottom wall 132 toward the middle thereof, the two or more inclined surfaces having a junction at which the drain port 131 is formed, the junction having the lowest height.
Further, the water discharge pipe 80 is communicated with the water discharge port 131, and the starting end 41 of the air guide pipe 40 opposite to the tail end 42 thereof passes through the box body 10 and penetrates out through the part of the bottom wall of the cooling chamber 130 higher than the position of the water discharge port 131, and continues to extend a preset distance to the inside of the cooling chamber 130. That is, the air guiding pipe 40 passes through the other part of the cooling chamber bottom wall 132 except for the water outlet 131, and the starting end 41 (i.e., the upper end) of the air guiding pipe 40 is higher than the passing part of the cooling chamber bottom wall 132. Therefore, the defrosting water flowing on the cooling chamber bottom wall 132 can be prevented from entering the air guide pipe 40 through the starting end 41 of the air guide pipe 40, so that the air guide pipe 40 drips or the fan 43 is prevented from being soaked, and the damage or the potential safety hazard is avoided.
Specifically, the predetermined distance may be set to be greater than zero such that the beginning of the air guiding duct 40 is lower than the bottom end of the evaporator 20. That is, the starting end 41 of the air guiding pipe 40 is lower than the lowest end of the evaporator 20 and is located below the evaporator 20, so that the air flow sent into the cooling chamber 130 through the air guiding pipe 40 flows to the whole evaporator 20 from bottom to top, which is beneficial to uniformly defrosting the evaporator 20.
In some embodiments, the fan 43 is disposed inside the port at the end 42 of the duct 40 that extends outside the enclosure 10. That is, the fan 43 is located inside the air guide duct 40 and does not interfere with other structures, and the fan 43 is located at the end 42 of the air guide duct 40 and is easy to disassemble, assemble and maintain.
It will be appreciated by those skilled in the art that the refrigerator-freezer 1 to which the present invention relates may be a refrigerator, freezer, wine chest, cold can or other device having a refrigerating or freezing function. The control method of the refrigerating and freezing device of the present invention is particularly suitable for a refrigerating and freezing device having a single system refrigeration system, that is, the refrigerating and freezing device 1 has only one evaporator 20 regardless of the number of the storages 110. The control method flow chart in the present invention is provided in the drawings only in some embodiments, and in other embodiments, the control method of the present invention may further include more steps mentioned above.
It should also be understood by those skilled in the art that the terms "upper", "lower", "front", "rear", and the like used in the embodiments of the present invention to indicate orientation or positional relationship are based on the actual use state of the refrigeration and freezing apparatus 1, and these terms are only used for convenience of description and understanding of the technical solution of the present invention, and do not indicate or imply that the apparatus referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore, should not be construed as limiting the present invention.
Thus, it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been illustrated and described in detail herein, many other variations or modifications consistent with the principles of the invention may be directly determined or derived 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 (10)
1. A control method of a cold storage and refrigeration device comprises a box body, an evaporator and an air guide pipe, wherein the box body is limited with a cooling chamber and a storage chamber, the evaporator is arranged in the cooling chamber and used for providing cold energy for the storage chamber, the air guide pipe is communicated with the cooling chamber and an external environment space of the box body, a fan is arranged in the air guide pipe, and the control method comprises the following steps:
receiving a first trigger signal for indicating the fan to reversely rotate, wherein the first trigger signal is generated when the evaporator starts defrosting or is generated after the evaporator starts defrosting for a first preset time, and the first preset time is less than the total defrosting time of the evaporator; and
and controlling the fan to rotate reversely so as to enable the ambient air in the external environment space of the box body to flow to the cooling chamber through the air guide pipe, so that the evaporator is defrosted by the ambient air.
2. The control method according to claim 1, wherein a controllable shielding mechanism for selectively blocking and/or conducting the air guide pipe is further arranged at the air guide pipe; and is
After receiving the first trigger signal and before controlling the fan to reverse, the control method further includes: and opening the controllable shielding mechanism to conduct the air guide pipe.
3. The control method according to claim 1, further comprising:
receiving a second trigger signal for indicating the end of defrosting of the evaporator;
and controlling the fan to rotate positively to promote the air in the cooling chamber to flow to the external environment space where the box body is located through the air guide pipe, so as to discharge heat generated when the evaporator is defrosted.
4. The control method according to claim 3, wherein after controlling the fan to rotate forward, the control method further includes:
judging whether the forward rotation time of the fan reaches a second preset time;
if yes, the fan is stopped.
5. The control method according to claim 4, further comprising:
outputting a first fault prompt signal for indicating that the fan is in fault when any one of the following conditions is met:
detecting that the fan is not started within a third preset time after the fan is controlled to reversely rotate;
detecting that the fan stops or still rotates reversely within a fourth preset time after the fan is controlled to rotate forwardly;
detecting that the fan is not stopped within a fifth preset time after the fan is stopped; wherein
The third preset time length, the fourth preset time length and the fifth preset time length are equal or different.
6. The control method according to claim 4, wherein a controllable shielding mechanism for selectively blocking and/or conducting the air guide pipe is further arranged at the air guide pipe; and is
After receiving the first trigger signal and before controlling the fan to reverse, the control method further includes: opening the controllable shielding mechanism to conduct the air guide pipe;
after stopping the fan, the control method further includes: and closing the controllable shielding mechanism to block the air guide pipe.
7. The control method according to claim 6, further comprising:
outputting a second fault indication signal for indicating that the controllable masking mechanism is faulty when any of the following conditions is met:
detecting that the controllable shielding mechanism is not opened within a sixth preset time after the controllable shielding mechanism is opened;
detecting that the controllable shielding mechanism is not closed within a seventh preset time period after the controllable shielding mechanism is closed; wherein
The sixth preset time period and the seventh preset time period are equal or different.
8. The control method according to claim 1, wherein the refrigeration freezer further includes a defrost heater disposed adjacent to and below the evaporator, and a start end of the air duct located in the cooling chamber is located below the defrost heater; and is
If the first trigger signal is generated when the evaporator starts defrosting, the control method further comprises starting the defrosting heater after receiving the first trigger signal.
9. The control method according to claim 1, wherein the storage compartment is a refrigeration compartment, a moisture preservation drawer is arranged in the storage compartment, an air supply opening communicated with the cooling chamber is formed in the rear side of the moisture preservation drawer, and an air supply damper is arranged at the air supply opening; after controlling the fan to reverse, the control method further comprises:
detecting the humidity in the moisturizing drawer;
when humidity in the moisture preservation drawer is less than a first preset humidity threshold value, the air supply air door is controlled to be opened the air supply outlet to allow air in the cooling chamber to flow into through the air supply outlet the moisture preservation drawer is right space in the moisture preservation drawer is humidified until the air supply air door is controlled to be closed when the humidity in the moisture preservation drawer is greater than a second preset humidity threshold value, and the second preset humidity threshold value is greater than the first preset humidity threshold value.
10. The control method according to claim 1,
the refrigeration and freezing device further comprises a drain pipe which is independent from the air guide pipe, the drain pipe extends from the cooling chamber to the outside of the box body and is used for discharging defrosting water generated by defrosting of the evaporator, the tail ends of the air guide pipe and the drain pipe, which extend out of the box body, are both positioned in a compressor bin of the refrigeration and freezing device, and a compressor and a water receiving tray for collecting the defrosting water are arranged in the compressor bin.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010442900.7A CN113701444A (en) | 2020-05-22 | 2020-05-22 | Control method of refrigerating and freezing device |
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| CN202010442900.7A CN113701444A (en) | 2020-05-22 | 2020-05-22 | Control method of refrigerating and freezing device |
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Application publication date: 20211126 |