CN113465261A - Refrigerating and freezing device and fresh-keeping control method thereof - Google Patents
Refrigerating and freezing device and fresh-keeping control method thereof Download PDFInfo
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- CN113465261A CN113465261A CN202010239175.3A CN202010239175A CN113465261A CN 113465261 A CN113465261 A CN 113465261A CN 202010239175 A CN202010239175 A CN 202010239175A CN 113465261 A CN113465261 A CN 113465261A
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- 238000000034 method Methods 0.000 title claims abstract description 45
- 238000007710 freezing Methods 0.000 title claims abstract description 34
- 230000008014 freezing Effects 0.000 title claims abstract description 34
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 160
- 239000001301 oxygen Substances 0.000 claims abstract description 160
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 160
- 235000013305 food Nutrition 0.000 claims abstract description 115
- 239000000463 material Substances 0.000 claims abstract description 109
- 238000004321 preservation Methods 0.000 claims abstract description 60
- 239000007789 gas Substances 0.000 claims abstract description 59
- 230000001105 regulatory effect Effects 0.000 claims abstract description 14
- 230000002349 favourable effect Effects 0.000 claims abstract description 3
- 238000005057 refrigeration Methods 0.000 claims description 25
- 230000001276 controlling effect Effects 0.000 claims description 23
- 230000008859 change Effects 0.000 claims description 19
- 230000003750 conditioning effect Effects 0.000 claims description 13
- 230000008569 process Effects 0.000 claims description 8
- 239000003795 chemical substances by application Substances 0.000 claims description 5
- 238000006392 deoxygenation reaction Methods 0.000 claims description 4
- 230000009467 reduction Effects 0.000 claims description 4
- 238000004590 computer program Methods 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 230000029058 respiratory gaseous exchange Effects 0.000 abstract description 11
- 230000002035 prolonged effect Effects 0.000 abstract description 5
- 230000004099 anaerobic respiration Effects 0.000 abstract description 4
- 235000012055 fruits and vegetables Nutrition 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000005265 energy consumption Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 235000021022 fresh fruits Nutrition 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 235000013311 vegetables Nutrition 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000005187 foaming Methods 0.000 description 1
- 230000002401 inhibitory effect Effects 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 230000004060 metabolic process Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Images
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
- 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
- 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
- F25D17/042—Air treating means within refrigerated spaces
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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
- 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/003—Arrangement or mounting of control or safety devices for movable 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
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/005—Mounting of control 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
- 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
-
- 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
- F25D2317/0411—Treating air flowing to refrigeration compartments by purification by dehumidification
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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
-
- 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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/02—Sensors detecting door opening
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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
- F25D2700/00—Means for sensing or measuring; Sensors therefor
- F25D2700/16—Sensors measuring the temperature of products
Abstract
The invention provides a refrigerating and freezing device and a preservation control method thereof, the refrigerating and freezing device comprises a box body limited with a storage space, a gas regulating device, a circulating pump, a weight sensor and an oxygen concentration sensor, wherein the storage space is internally provided with a closed preservation subspace, the circulating pump is configured to enable gas in the preservation subspace to pass through the gas regulating device so as to form a gas atmosphere favorable for preserving food materials in the preservation subspace, and the control method comprises the following steps: acquiring the weight of the food material currently stored in the fresh-keeping subspace, which is detected by a weight sensor; acquiring a preset oxygen concentration corresponding to the weight of the currently stored food material; the oxygen concentration detected by the oxygen concentration sensor is obtained, and the circulating pump is correspondingly controlled, so that the oxygen concentration of the preservation subspace is kept at the preset oxygen concentration, the respiration of food materials is reduced, the basic respiration of the food materials is guaranteed, anaerobic respiration is avoided, and the preservation time of the food materials is prolonged.
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 preservation control method thereof.
Background
At present, in order to meet the demand of people for higher quality of life, the functions of refrigerators are continuously and iteratively upgraded, wherein the preservation of fresh fruits and vegetables purchased in daily life is particularly important, and the freshness of the fresh fruits and vegetables is reduced through respiration so as to deteriorate.
At present, a method for inhibiting fruit and vegetable respiration generally comprises the steps of carrying out oxygen extraction on a storage space where fruits and vegetables are located at intervals of a certain time, and reducing the oxygen concentration of the storage space where the fruits and vegetables are located, but because the types and the weights of the fruits and vegetables in the storage space can be changed frequently, and the proper oxygen concentrations required by the fruits and vegetables of different types and different weights are different, the optimal oxygen concentration can not be continuously provided for the fruits and vegetables only through the oxygen extraction at intervals of the certain time, and the fresh-keeping effect is influenced.
Disclosure of Invention
An object of the present invention is to provide a refrigerating and freezing apparatus and a freshness-retaining control method thereof which solve at least the above problems.
It is a further object of the present invention to provide suitable oxygen concentrations for food materials of different weights.
According to an aspect of the present invention, the present invention firstly provides a fresh-keeping control method for a refrigeration and freezing apparatus, the refrigeration and freezing apparatus comprises a box body defining a storage space, a gas regulating device, a circulating pump, a weight sensor and an oxygen concentration sensor, the storage space has a sealed fresh-keeping subspace, the weight sensor and the oxygen concentration sensor are both arranged in the fresh-keeping subspace, the circulating pump is configured to make gas in the fresh-keeping subspace pass through the gas regulating device so as to form a gas atmosphere favorable for food fresh-keeping in the fresh-keeping subspace, and the control method comprises:
acquiring the weight of the food material currently stored in the fresh-keeping subspace, which is detected by the weight sensor;
acquiring a preset oxygen concentration corresponding to the weight of the currently stored food material;
and acquiring the oxygen concentration detected by the oxygen concentration sensor, and correspondingly controlling the circulating pump so as to keep the oxygen concentration of the fresh-keeping subspace at the preset oxygen concentration.
Optionally, the step of acquiring the oxygen concentration detected by the oxygen concentration sensor comprises:
controlling the oxygen concentration sensor to collect the oxygen concentration of the fresh-keeping subspace once at intervals of first preset time;
acquiring the oxygen concentration detected by the oxygen concentration sensor each time;
the step of controlling the circulation pump accordingly includes:
when the oxygen concentration of the fresh-keeping subspace is equal to or lower than the difference between the preset oxygen concentration and the preset deviation of the oxygen concentration, closing the circulating pump;
and when the oxygen concentration of the fresh-keeping subspace is higher than the sum of the preset oxygen concentration and the preset deviation of the oxygen concentration, controlling the circulating pump to be started at a first preset power, and controlling the power of the circulating pump to be reduced along with the reduction of the oxygen concentration detected by the oxygen concentration sensor every time.
Optionally, before the step of obtaining the weight of the food material currently stored in the fresh-keeping subspace, which is detected by the weight sensor, the method further includes:
detecting an event of opening and closing the fresh-keeping subspace;
and in the process that the preservation subspace is opened and closed, detecting whether the food materials placed in the preservation subspace change or not, and executing the step of acquiring the weight of the food materials currently stored in the preservation subspace, which is detected by the weight sensor, when the food materials placed in the preservation subspace change.
Optionally, in the process that the fresh-keeping subspace is opened and closed, the step of detecting whether the food material placed in the fresh-keeping subspace changes includes:
when the preservation subspace is opened, acquiring the weight of the food materials placed in the preservation subspace, detected by the weight sensor, recording the weight as an initial weight value, and detecting the temperature of the food materials placed in the preservation subspace to obtain an initial temperature value;
when the preservation subspace is closed for a second preset time, acquiring the weight of the food materials placed in the preservation subspace and detected by the weight sensor, recording the weight as a current weight value, and detecting the temperature of the food materials placed in the preservation subspace to acquire a current temperature value;
calculating the absolute value of the difference value between the current weight value and the initial weight value, recording the absolute value as a weight difference, and calculating the absolute value of the difference value between the current temperature value and the initial temperature value, and recording the absolute value as a temperature difference;
the weight difference is greater than a preset weight difference threshold value, and when the temperature difference is greater than a preset temperature difference threshold value, the food materials placed in the fresh-keeping subspace are determined to change.
Optionally, the freshness keeping control method further includes:
controlling the circulation pump and the oxygen concentration sensor to remain off after determining that the fresh-keeping subspace is opened and not closed.
Optionally, the step of controlling the circulation pump accordingly further comprises:
and if the oxygen concentration detected by the oxygen concentration sensor is not within the preset effective range of the oxygen concentration sensor, outputting a warning of the fault of the oxygen concentration sensor, and controlling the circulating pump to start a third preset time at a second preset power and stop circulating work for a fourth preset time.
According to another aspect of the present invention, there is also provided a refrigeration and freezing apparatus comprising:
the refrigerator comprises a box body, a storage space and a fresh-keeping device, wherein the storage space is limited in the box body and is provided with a closed fresh-keeping subspace;
a gas conditioning device in communication with the fresh food subspace and configured to consume oxygen in the gas;
a circulation pump connected to the gas conditioning device and the freshness sub-space and configured to pass gas in the freshness sub-space through the gas conditioning device to reduce the oxygen concentration in the freshness sub-space;
the weight sensor is arranged in the fresh-keeping subspace and is configured to be controlled to detect the weight of the food materials stored in the fresh-keeping subspace;
an oxygen concentration sensor disposed within the fresh-keeping subspace and configured to be controlled to detect an oxygen concentration of the fresh-keeping subspace;
a controller comprising a memory and a processor, the memory having stored therein a computer program for implementing the freshness control method according to any one of claims 1 to 6 when executed by the processor.
Optionally, the refrigeration freezer further comprises:
an open-close detector configured to be controlled to detect an event that the freshness sub-space is opened or closed;
an infrared sensor configured to controllably detect a temperature of food material placed within the fresh food subspace.
Optionally, the gas regulating device comprises a deoxidizing pipe, a deoxidizing agent is contained in the deoxidizing pipe, and a gas inlet of the deoxidizing pipe is communicated with a gas outlet of the fresh-keeping subspace;
the fresh-keeping subspace is also provided with an air return port, and the air outlet of the deoxygenation pipe is communicated with the air return port of the fresh-keeping subspace so as to convey the deoxygenated gas into the fresh-keeping subspace again.
Optionally, a desiccant is further contained within the deoxygenation tube to dehumidify the gas entering the deoxygenation tube to regulate the humidity of the fresh-keeping subspace.
According to the refrigerating and freezing device and the preservation control method thereof, through the matching of the weight sensor and the oxygen concentration sensor, the weight change of the food materials in the preservation subspace can be known in time, the circulating pump is started in time, the oxygen concentration suitable for preserving the food materials with different weights is created for the preservation subspace, the efficiency of the circulating pump and the gas adjusting device is improved, the respiration effect of the food materials is reduced, the basic respiration of the food materials is ensured, the anaerobic respiration is avoided, the preservation time of the food materials is prolonged, and the intelligence of the refrigerating and freezing device is improved.
Further, according to the refrigeration and freezing device and the preservation control method thereof, the oxygen concentration of the preservation subspace is dynamically monitored in the operation process of the circulating pump, and the power of the circulating pump is gradually reduced according to the dynamic change of the oxygen concentration, so that the energy consumption of the circulating pump is reduced while the oxygen concentration of the preservation subspace is reduced to the preset oxygen concentration.
Furthermore, according to the refrigeration and freezing device and the preservation control method thereof, whether the value change of the weight sensor is caused by the putting of the new food material is verified according to the temperature change of the food material in the preservation subspace, and after the new food material is confirmed to be put in the preservation subspace, the circulating pump is started, the oxygen concentration in the preservation subspace is adjusted to be the preset oxygen concentration corresponding to the value of the weight sensor, the oxygen concentration for reducing respiration is provided for the new food material in time, and the preservation time of the new food material is ensured.
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:
fig. 1 is a schematic structural view of a refrigerating and freezing apparatus according to an embodiment of the present invention;
FIG. 2 is a schematic block diagram of the fresh food subspace and the distribution of the various components therein of a refrigeration chiller apparatus in accordance with one embodiment of the present invention;
FIG. 3 is a schematic connection diagram of the fresh food subspace, the circulation pump and the deoxygenator tube of a refrigeration freezer in accordance with one embodiment of the present invention;
FIG. 4 is a schematic block diagram of a refrigeration freezer apparatus according to one embodiment of the present invention;
fig. 5 is a schematic diagram of a freshness control method of a refrigeration freezer in accordance with one embodiment of the present invention; and
fig. 6 is an implementation flow of a freshness control method for a refrigerating and freezing apparatus applied to a refrigerator according to an embodiment of the present invention.
Detailed Description
The present embodiment provides a refrigerating and freezing apparatus 100 and a freshness keeping control method thereof, which will be described in detail below with reference to fig. 1 to 6.
As shown in fig. 1 to 4, the refrigerating and freezing apparatus 100 of the present embodiment may be a storage device having refrigerating and freezing functions, such as a refrigerator and a freezer, and includes a box body defining a storage space 110, a gas conditioning device 120, a circulation pump 103, a weight sensor 101, an oxygen concentration sensor 102, and a controller 130. The storage space 110 is provided with a sealed fresh-keeping subspace 111, the gas regulating device 120 is communicated with the fresh-keeping subspace 111 and is configured to consume oxygen in the gas, and the circulating pump 103 is configured to enable the gas in the fresh-keeping subspace 111 to pass through the gas regulating device 120 so as to reduce the oxygen concentration of the fresh-keeping subspace 111. The oxygen concentration sensor 102 and the weight sensor 101 are both disposed in the fresh-keeping subspace 111, the oxygen concentration sensor 102 is configured to be controlled to detect the oxygen concentration of the fresh-keeping subspace 111, and the weight sensor 101 is configured to be controlled to detect the weight of the food material stored in the fresh-keeping subspace 111, so as to determine the weight of the food material stored in the fresh-keeping subspace 111 at different periods, so as to adjust the oxygen concentration of the storage subspace according to the weight of the food material. The controller 130 includes a memory 132 and a processor 131, and a computer program 1321 is stored in the memory 132 and executed by the processor 131 to implement the freshness control method described below.
The refrigeration and freezing device 100 of this embodiment passes through the cooperation of weighing transducer 101 and oxygen concentration sensor 102, can in time know fresh-keeping subspace 111 eat material weight change, in time open circulating pump 103 according to fresh-keeping subspace 111's edible material weight, build the fresh-keeping oxygen concentration of the fresh-keeping subspace 111 that suitable different weight edible material, when improving circulating pump 103 and gas regulating device 120's efficiency, the respiration of eating the material has been reduced, guarantee the basic breathing of eating the material simultaneously, avoid anaerobic respiration, thereby the fresh-keeping time of eating the material is prolonged.
In some embodiments, the crisper subspace 111 may be defined by a push-pull drawer, the storage space 110 having a drawer space that receives the drawer, the drawer may have a drawer barrel and a drawer body, the crisper subspace 111 being formed by a drawer-type storage compartment, the drawer barrel may have a forward facing opening, the drawer body having an end plate that closes the forward facing opening, the drawer body being operable to move back and forth to open or close the crisper subspace 111.
In an alternative embodiment, the fresh-keeping subspace 111 may be any space of the refrigeration and freezing apparatus 100, for example, the refrigerating chamber of the refrigeration and freezing apparatus 100 is divided into a plurality of subspaces, any one of which may be used as the fresh-keeping subspace 111, for example, the fresh-keeping subspace 111 is a lowermost subspace of the refrigerating chamber and is used as the fresh-keeping subspace 111. The refrigerating and freezing device 100 may further have a door body installed outside the cabinet and configured to open or close the storage space 110 of the cabinet, and a small door may be further provided inside the door body to open or close the fresh-keeping sub-space 111 in order to ensure the sealing property of the fresh-keeping sub-space 111.
In some embodiments, the gas conditioning device 120 may include a deoxidizing pipe 121, a deoxidizing agent is disposed in the deoxidizing pipe 121, a gas inlet of the deoxidizing pipe 121 is communicated with a gas outlet 111a of the fresh-keeping subspace 111, the fresh-keeping subspace 111 is further formed with a gas return opening 111b, and a gas outlet of the deoxidizing pipe 121 is communicated with the gas return opening 111b of the fresh-keeping subspace 111 to deliver the deoxidized gas to the fresh-keeping subspace 111 again. In the embodiment, the deoxidizing pipe 121 containing the deoxidizing agent is used for absorbing oxygen in the gas in the fresh-keeping subspace 111, the structure is simple, the cost is low, and the deoxidizing agent can be replaced for repeated use.
In some embodiments, the deoxidizing pipe 121 may contain a drying agent, which can dehumidify the gas entering the deoxidizing pipe 121, adjust the humidity of the fresh-keeping subspace 111, and prevent the storage time of the food material from being affected by the excessive humidity of the fresh-keeping subspace 111.
In an alternative embodiment, the gas conditioning device 120 may comprise a modified atmosphere film, which allows only oxygen in the gas to pass through, thereby filtering out the oxygen in the gas and reducing the oxygen concentration in the fresh food subspace 111. However, the gas conditioning device 120 including the gas conditioning membrane is relatively expensive and relatively complex in construction. The present invention may preferably employ the deoxidation pipe 121.
The gas conditioning device 120 may be disposed in the foaming layer at the rear of the fresh-keeping subspace 111, and the circulation pump 103 may be disposed in the compressor compartment of the refrigeration and freezing apparatus 100, and both the air outlet 111a and the air return opening 111b of the fresh-keeping subspace 111 may be formed at the rear wall thereof. The air inlet end of the circulating pump 103 is connected with the air outlet end of the deoxidizing pipe 121 through a pipeline and is communicated with the air return port 111b of the fresh-keeping subspace 111 through another pipeline, so that the air in the fresh-keeping subspace 111 enters the deoxidizing pipe 121, and then the deoxidized air is made to flow back into the fresh-keeping subspace 111, and the oxygen concentration in the fresh-keeping subspace 111 is reduced.
The refrigerating and freezing apparatus 100 may further include an opening/closing detector 104 and an infrared sensor 105. The open/close detector 104 may be configured to be controlled to detect an event that the fresh food subspace 111 is opened or closed, the open/close detector 104 may detect whether the fresh food subspace 111 is opened or closed using a hall device, etc., and when the drawer-type storage compartment is used as the fresh food subspace 111, the open/close detector 104 may be respectively disposed on an end plate of the drawer body and a drawer cylinder. And the infrared sensor 105 may be configured to be controlled to detect the temperature of the food material placed within the fresh food subspace 111.
When the opening and closing detector 104 detects that the fresh-keeping subspace 111 is opened and the second preset time after the fresh-keeping subspace 111 is closed, the controller 130 may control the weight sensor 101 to detect the weight of the food material placed in the fresh-keeping subspace 111 respectively, and obtain the detection value of the weight sensor 101 respectively, that is, the initial weight value and the current weight value described below, and the controller 130 may also control the infrared sensor 105 to detect the temperature of the food material placed in the fresh-keeping subspace 111 respectively, and obtain the detection value of the infrared sensor 105 respectively, that is, the initial temperature value and the current temperature value described below.
The processor 131 of the controller 130 calculates an absolute value of a difference between the current weight value and the initial weight value, that is, a weight difference described below, and calculates an absolute value of a difference between the current temperature value and the initial temperature value, that is, a temperature difference described below, when the processor 131 determines that the weight difference is greater than a preset weight difference threshold and the temperature difference is greater than a preset temperature difference threshold, it is determined that the food material placed in the fresh-keeping subspace 111 changes, the weight of the food material detected by the weight sensor 101 after the fresh-keeping subspace 111 is closed can be obtained again, a preset oxygen concentration corresponding to the weight of the food material is obtained, the oxygen concentration detected by the oxygen concentration sensor 102 is obtained, and the circulation pump 103 is correspondingly controlled, so that the oxygen concentration of the fresh-keeping subspace 111 is within the preset oxygen concentration range.
Based on the refrigeration and freezing apparatus 100, as shown in fig. 5, the freshness protection control method of the present embodiment may include:
s502, acquiring the weight of the food material currently stored in the fresh-keeping subspace 111 detected by the weight sensor 101;
s504, acquiring a preset oxygen concentration corresponding to the weight of the currently stored food material;
s506, the oxygen concentration detected by the oxygen concentration sensor 102 is obtained, and the circulating pump 103 is correspondingly controlled, so that the oxygen concentration of the fresh-keeping subspace 111 is kept in the preset oxygen concentration range.
The preset oxygen concentration and the weight of the food material have a one-to-one correspondence relationship, and a mathematical model of the oxygen concentration and the weight of the food material is constructed in advance and stored in a database that can be retrieved by the processor 131. The embodiment detects the weight of the food material in the fresh-keeping subspace 111 through the weight sensor 101, and adjusts the oxygen concentration of the fresh-keeping subspace 111 to the preset oxygen concentration according to the preset oxygen concentration corresponding to the food material with different weights by using the gas regulating device 120, so that the metabolism of the food material is inhibited while the efficiency of the circulating pump 103 and the gas regulating device 120 is improved, and the fresh-keeping time of the food material is prolonged.
The step of acquiring the oxygen concentration detected by the oxygen concentration sensor 102 includes: and controlling the oxygen concentration sensor 102 to collect the oxygen concentration of the primary fresh-keeping subspace 111 at intervals of a first preset time, and obtaining the oxygen concentration detected by the oxygen concentration sensor 102 every time. The first preset time may be preset before the factory of the refrigeration and freezing apparatus 100, for example, the first preset time is 5s, so as to dynamically monitor the oxygen concentration of the fresh-keeping subspace 111 and adjust the oxygen concentration of the fresh-keeping subspace 111 accordingly.
And the step of controlling the circulation pump 103 accordingly may comprise:
when the oxygen concentration of the fresh-keeping subspace 111 is equal to or lower than the difference between the preset oxygen concentration and the preset deviation of the oxygen concentration, the circulating pump 103 is closed;
when the oxygen concentration of the fresh-keeping subspace 111 is higher than the sum of the preset oxygen concentration and the preset deviation of the oxygen concentration, the circulating pump 103 is controlled to be started at a first preset power, and the power of the circulating pump 103 is controlled to be reduced along with the reduction of the acquired oxygen concentration detected by the oxygen concentration sensor 102 every time.
That is, when the oxygen concentration of the fresh-keeping subspace 111 is reduced to a certain concentration, the circulation pump 103 is turned off, and when the oxygen concentration is increased to a certain concentration, the circulation pump 103 is turned on, so that the gas of the fresh-keeping subspace 111 is deoxygenated through the gas conditioning device 120, the oxygen concentration is gradually reduced, and along with the reduction of the oxygen concentration of the fresh-keeping subspace 111, the power of the circulation pump 103 is dynamically adjusted, the power of the circulation pump 103 is gradually reduced, so that the energy consumption of the circulation pump 103 is reduced while the oxygen concentration of the fresh-keeping subspace 111 is reduced to the preset oxygen concentration. Moreover, the embodiment introduces the oxygen concentration preset deviation to correct the preset oxygen concentration, and avoids frequent opening or closing of the circulating pump 103.
The corresponding relationship between the oxygen concentration and the power of the circulation pump 103 may be stored in the database in advance for the processor 131 to call when executing the steps of the aforementioned control method.
The control method may be continuously executed or executed at intervals of a fixed preset time during the operation of the refrigeration and freezing apparatus 100, but since the food material in the fresh-keeping subspace 111 may not change in a period of time, the continuous execution may increase the energy consumption of the refrigeration and freezing apparatus 100 and bring about ineffective work, and the execution at intervals of a fixed preset time may also bring about ineffective work due to uncertainty of the time of the change of the food material. Therefore, before the step of obtaining the weight of the food material currently stored in the fresh-keeping subspace 111 detected by the weight sensor 101, the control method of the embodiment further sets the following steps:
detecting an event of opening and closing the fresh-keeping subspace 111;
in the process that the fresh-keeping subspace 111 is opened and closed, whether the food material placed in the fresh-keeping subspace 111 changes or not is detected, and when the food material placed in the fresh-keeping subspace 111 changes, the step of acquiring the weight of the food material currently stored in the fresh-keeping subspace 111, which is detected by the weight sensor 101, is executed.
By detecting the state of the food material in the process of opening and closing the fresh-keeping subspace 111, the opportunity of the fresh-keeping subspace 111 for the change of the food material can be accurately grasped, and when the food material changes, the control method is started, so that the oxygen concentration of the fresh-keeping subspace 111 can be timely adjusted according to the change of the weight of the food material, the invalid work can be avoided, and the overall energy consumption of the refrigeration and freezing device 100 can be reduced.
The preservation control method can also comprise the following steps: after the fresh-keeping subspace 111 is determined to be opened and before the fresh-keeping subspace 111 is not closed, the circulation pump 103 and the oxygen concentration sensor 102 are controlled to be kept closed, and due to the process, air in the external environment can enter the fresh-keeping subspace 111 to cause unstable oxygen concentration in the fresh-keeping subspace 111, so that accurate oxygen concentration cannot be provided for the opening of the circulation pump 103.
The control method of the present embodiment may further consider a coping manner when the oxygen concentration sensor 102 is out of order, and specifically, the step of correspondingly controlling the circulation pump 103 may further include: if the oxygen concentration detected by the oxygen concentration sensor 102 is not within the preset effective range of the oxygen concentration sensor 102, outputting a warning of the fault of the oxygen concentration sensor 102, and controlling the circulating pump 103 to start at a second preset power for a third preset time and stop at a fourth preset time for circulating work. Therefore, when the oxygen concentration sensor 102 fails, the oxygen concentration in the fresh-keeping subspace 111 can be timely reduced, and a fault prompt is timely output so as to facilitate timely replacement.
In the process that the fresh-keeping subspace 111 is opened and closed, the step of detecting whether the food material placed in the fresh-keeping subspace 111 changes may specifically include:
when the fresh-keeping subspace 111 is opened, acquiring the weight of the food material placed in the fresh-keeping subspace 111, detected by the weight sensor 101, recording the weight as an initial weight value, and detecting the temperature of the food material placed in the fresh-keeping subspace 111 to acquire an initial temperature value;
when the preservation subspace 111 is closed for a second preset time, acquiring the weight of the food materials placed in the preservation subspace 111, detected by the weight sensor 101, recording the weight as a current weight value, and detecting the temperature of the food materials placed in the preservation subspace 111 to acquire a current temperature value;
calculating the absolute value of the difference value between the current weight value and the initial weight value, recording the absolute value as the weight difference, and calculating the absolute value of the difference value between the current temperature value and the initial temperature value, and recording the absolute value as the temperature difference;
when the weight difference is greater than the preset weight difference threshold value and the temperature difference is greater than the preset temperature difference threshold value, it is determined that the food materials placed in the fresh-keeping subspace 111 change.
The change of the value detected by the weight sensor 101 indicates that the food material in the fresh-keeping subspace 111 increases or decreases, the increase of the food material indicates that a new food material is put into the fresh-keeping subspace 111, and the decrease of the food material may be that the original food material is decreased and no new food material is put into the fresh-keeping subspace 111, or that the original food material is decreased and a new food material is put into the fresh-keeping subspace 111, which is more significant for prolonging the storage time of the new food material. Therefore, the present embodiment can utilize the temperature sensor, for example, the infrared sensor 105, to detect the change of the value to verify whether the fresh-keeping subspace 111 is filled with the new food material, and after determining that the fresh-keeping subspace 111 is filled with the new food material, the aforementioned steps of the control method are executed to ensure the storage time of the new food material.
Fig. 6 is an execution flow of the freshness keeping control method of the refrigerating and freezing apparatus 100 according to an embodiment of the invention, applied to a refrigerator, and the execution flow includes the following steps:
s602, detecting an event of opening and closing the fresh-keeping subspace 111;
s604, when the preservation subspace 111 is opened, acquiring the weight of the food material placed in the preservation subspace 111, detected by the weight sensor 101, recording the weight as an initial weight value, and detecting the temperature of the food material placed in the preservation subspace 111 to acquire an initial temperature value;
s606, when the preservation subspace 111 is closed for a second preset time, obtaining the weight of the food materials placed in the preservation subspace 111, detected by the weight sensor 101, recording the weight as a current weight value, detecting the temperature of the food materials placed in the preservation subspace 111, and obtaining a current temperature value;
s608, calculating the absolute value of the difference between the current weight value and the initial weight value, recording as the weight difference, and calculating the absolute value of the difference between the current temperature value and the initial temperature value, recording as the temperature difference;
s610, judging whether the weight difference is larger than a preset weight difference threshold value or not, and whether the temperature difference is larger than a preset temperature difference threshold value or not, if so, executing a step S612, otherwise, returning to the step S602;
s612, acquiring the weight of the food material currently stored in the fresh-keeping subspace 111 detected by the weight sensor 101;
s614, controlling the oxygen concentration sensor 102 to collect the oxygen concentration of the fresh-keeping subspace 111 once at intervals of first preset time, and acquiring the oxygen concentration detected by the oxygen concentration sensor 102 each time;
s616, when the oxygen concentration in the fresh-keeping subspace 111 is equal to or lower than the difference between the preset oxygen concentration and the preset deviation of the oxygen concentration, closing the circulating pump 103;
s618, when the oxygen concentration in the fresh-keeping sub-space 111 is higher than the sum of the preset oxygen concentration and the preset deviation of the oxygen concentration, controlling the circulation pump 103 to be turned on at a first preset power, and controlling the power of the circulation pump 103 to decrease with the decrease of the oxygen concentration detected by the oxygen concentration sensor 102 each time.
According to the refrigerating and freezing device 100 and the preservation control method thereof in the embodiment, through the matching of the weight sensor 101 and the oxygen concentration sensor 102, the weight change of the food materials in the preservation subspace 111 can be known in time, the circulating pump 103 is started in time according to the weight of the food materials in the preservation subspace 111, the oxygen concentration suitable for preservation of the food materials with different weights is built for the preservation subspace 111, when the efficiencies of the circulating pump 103 and the gas adjusting device 120 are improved, the respiration effect of the food materials is reduced, the basic respiration of the food materials is ensured, the anaerobic respiration is avoided, and the preservation time of the food materials is prolonged.
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 freshness control method for a refrigeration and freezing device, the refrigeration and freezing device comprises a box body defining a storage space, a gas regulating device, a circulating pump, a weight sensor and an oxygen concentration sensor, the storage space is internally provided with a sealed freshness sub-space, the weight sensor and the oxygen concentration sensor are both arranged in the freshness sub-space, the circulating pump is configured to enable gas in the freshness sub-space to pass through the gas regulating device when the circulating pump is operated so as to form a gas atmosphere favorable for food material freshness preservation in the freshness sub-space, and the control method comprises the following steps:
acquiring the weight of the food material currently stored in the fresh-keeping subspace, which is detected by the weight sensor;
acquiring a preset oxygen concentration corresponding to the weight of the currently stored food material;
and acquiring the oxygen concentration detected by the oxygen concentration sensor, and correspondingly controlling the circulating pump so as to keep the oxygen concentration of the fresh-keeping subspace at the preset oxygen concentration.
2. The freshness-keeping control method according to claim 1, wherein
The step of acquiring the oxygen concentration detected by the oxygen concentration sensor includes:
controlling the oxygen concentration sensor to collect the oxygen concentration of the fresh-keeping subspace once at intervals of first preset time;
acquiring the oxygen concentration detected by the oxygen concentration sensor each time;
the step of controlling the circulation pump accordingly includes:
when the oxygen concentration of the fresh-keeping subspace is equal to or lower than the difference between the preset oxygen concentration and the preset deviation of the oxygen concentration, closing the circulating pump;
and when the oxygen concentration of the fresh-keeping subspace is higher than the sum of the preset oxygen concentration and the preset deviation of the oxygen concentration, controlling the circulating pump to be started at a first preset power, and controlling the power of the circulating pump to be reduced along with the reduction of the oxygen concentration detected by the oxygen concentration sensor every time.
3. The freshness control method according to claim 1, further comprising, before the step of obtaining the weight of the food material currently stored in the freshness sub-space detected by the weight sensor, the steps of:
detecting an event of opening and closing the fresh-keeping subspace;
and in the process that the preservation subspace is opened and closed, detecting whether the food materials placed in the preservation subspace change or not, and executing the step of acquiring the weight of the food materials currently stored in the preservation subspace, which is detected by the weight sensor, when the food materials placed in the preservation subspace change.
4. The preservation control method of claim 3, wherein the step of detecting whether the food material placed in the preservation subspace changes while the preservation subspace is opened or closed comprises:
when the preservation subspace is opened, acquiring the weight of the food materials placed in the preservation subspace, detected by the weight sensor, recording the weight as an initial weight value, and detecting the temperature of the food materials placed in the preservation subspace to obtain an initial temperature value;
when the preservation subspace is closed for a second preset time, acquiring the weight of the food materials placed in the preservation subspace and detected by the weight sensor, recording the weight as a current weight value, and detecting the temperature of the food materials placed in the preservation subspace to acquire a current temperature value;
calculating the absolute value of the difference value between the current weight value and the initial weight value, recording the absolute value as a weight difference, and calculating the absolute value of the difference value between the current temperature value and the initial temperature value, and recording the absolute value as a temperature difference;
the weight difference is greater than a preset weight difference threshold value, and when the temperature difference is greater than a preset temperature difference threshold value, the food materials placed in the fresh-keeping subspace are determined to change.
5. The freshness control method according to claim 3 or 4, further comprising:
controlling the circulation pump and the oxygen concentration sensor to remain off after determining that the fresh-keeping subspace is opened and not closed.
6. The freshness-keeping control method according to claim 1, wherein
The step of controlling the circulation pump accordingly further comprises:
and if the oxygen concentration detected by the oxygen concentration sensor is not within the preset effective range of the oxygen concentration sensor, outputting a warning of the fault of the oxygen concentration sensor, and controlling the circulating pump to start a third preset time at a second preset power and stop circulating work for a fourth preset time.
7. A refrigeration chiller comprising:
the refrigerator comprises a box body, a storage space and a fresh-keeping device, wherein the storage space is limited in the box body and is provided with a closed fresh-keeping subspace;
a gas conditioning device in communication with the fresh food subspace and configured to consume oxygen in the gas;
a circulation pump connected to the gas conditioning device and the freshness sub-space and configured to pass gas in the freshness sub-space through the gas conditioning device to reduce the oxygen concentration in the freshness sub-space;
the weight sensor is arranged in the fresh-keeping subspace and is configured to be controlled to detect the weight of the food materials stored in the fresh-keeping subspace;
an oxygen concentration sensor disposed within the fresh-keeping subspace and configured to be controlled to detect an oxygen concentration of the fresh-keeping subspace;
a controller comprising a memory and a processor, the memory having stored therein a computer program for implementing the freshness control method according to any one of claims 1 to 6 when executed by the processor.
8. The refrigeration freezer of claim 7, further comprising:
an open-close detector configured to be controlled to detect an event that the freshness sub-space is opened or closed;
an infrared sensor configured to controllably detect a temperature of food material placed within the fresh food subspace.
9. A refrigerator-freezer according to claim 7, wherein the freezer is a refrigerator-freezer
The gas regulating device comprises a deoxidizing pipe, a deoxidizing agent is contained in the deoxidizing pipe, and a gas inlet of the deoxidizing pipe is communicated with a gas outlet of the fresh-keeping subspace;
the fresh-keeping subspace is also provided with an air return port, and the air outlet of the deoxygenation pipe is communicated with the air return port of the fresh-keeping subspace so as to convey the deoxygenated gas into the fresh-keeping subspace again.
10. A refrigerator-freezer according to claim 9, wherein the freezer is a refrigerator-freezer
And a drying agent is also contained in the deoxidizing pipe so as to dehumidify the gas entering the deoxidizing pipe, thereby regulating the humidity of the fresh-keeping subspace.
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Application publication date: 20211001 |