CN114440529B - Energy-saving control method for refrigerating system of refrigerator and refrigerator - Google Patents
Energy-saving control method for refrigerating system of refrigerator and refrigerator Download PDFInfo
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- CN114440529B CN114440529B CN202011208596.6A CN202011208596A CN114440529B CN 114440529 B CN114440529 B CN 114440529B CN 202011208596 A CN202011208596 A CN 202011208596A CN 114440529 B CN114440529 B CN 114440529B
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- 238000000034 method Methods 0.000 title claims abstract description 71
- 238000007710 freezing Methods 0.000 claims abstract description 193
- 230000008014 freezing Effects 0.000 claims abstract description 193
- 238000005057 refrigeration Methods 0.000 claims abstract description 54
- 230000008569 process Effects 0.000 claims abstract description 26
- 238000001816 cooling Methods 0.000 claims abstract description 17
- 238000012544 monitoring process Methods 0.000 claims abstract description 9
- 230000008859 change Effects 0.000 claims description 28
- XOFYZVNMUHMLCC-ZPOLXVRWSA-N prednisone Chemical compound O=C1C=C[C@]2(C)[C@H]3C(=O)C[C@](C)([C@@](CC4)(O)C(=O)CO)[C@@H]4[C@@H]3CCC2=C1 XOFYZVNMUHMLCC-ZPOLXVRWSA-N 0.000 claims description 14
- 239000008186 active pharmaceutical agent Substances 0.000 claims description 9
- 230000000630 rising effect Effects 0.000 claims description 5
- 230000007613 environmental effect Effects 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 238000004364 calculation method Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000010257 thawing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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
- F25D17/06—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
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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
- F25D19/00—Arrangement or mounting of refrigeration units with respect to devices or objects to be refrigerated, e.g. infrared detectors
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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
- F25D29/005—Mounting of control devices
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
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- 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
- F25D2700/12—Sensors measuring the inside temperature
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- 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)
- Devices That Are Associated With Refrigeration Equipment (AREA)
Abstract
The invention provides an energy-saving control method of a refrigerator refrigerating system, which comprises a compressor, a condenser, a capillary tube and an evaporator which are sequentially connected in series to form a loop; the energy-saving control method comprises the following steps: when the refrigerating conditions are met, firstly precooling an evaporator, and then refrigerating; monitoring the temperature of a freezing chamber in the refrigerating process, and increasing the rotation speed of a compressor and a fan to perform refrigeration when the temperature of the freezing chamber rises; freezing and refrigerating after the cold storage and refrigerating are finished; the invention relates to an energy-saving control method for a refrigerator refrigerating system, which comprises the steps of pre-cooling an evaporator, refrigerating, controlling the temperature by freezing and refrigerating in sequence; the influence on the temperature of the freezing chamber in the refrigerating process is effectively reduced, and the refrigerating efficiency after the refrigerating process is finished is improved, so that the whole refrigerating process is optimized, and the aim of saving energy is fulfilled.
Description
Technical Field
The invention belongs to the technical field of household refrigerators, and particularly relates to an energy-saving control method of a refrigerating system of a refrigerator and the refrigerator.
Background
According to the EU refrigerator energy efficiency directives (EC) No 643/2009 and (EU) No 1060/2010, new energy efficiency standards of the EU are issued on 12/5 of 2019 and are required to be enforced on 1 of 3/2021. The new EEI value calculation method is also different when the double standard is implemented during 11 months 2020 to 3 months 2021, and the standard requirement energy efficiency level is divided into a to G. According to the new EEI value calculation method, the current EEI limit value of A++ +30+.about.15.4 is converted into the new EEI value which is equivalent to 51, it is possible to fall just into the new class B (41 < EEI. Ltoreq.51), the current EEI limit for a+++20% ∈ is 17.6, the new EEI value is converted to 59, and falls into a new C level (51 is less than or equal to 64), the current EEI limit value of A++ is 22, the new EEI value is converted to 73, and falls into a new D level (64 is less than or equal to 80). About half of the A+ products (33 < present EEI < 42, converted to new standards of about 110 < new EEI < 140) will be banned by the market in 2020, depending on the minimum admission energy requirements of the instruction draft (new EEI < 125). After the new energy efficiency instruction is implemented, the average energy saving is expected to be pushed by about 30%, and the new energy efficiency instruction provides energy saving requirements for the energy consumption of the refrigerator.
The existing refrigerator products have two or more temperature areas, such as refrigeration generally requires within 0-8 degrees, refrigeration requires below-18 degrees, and whether single-system air door control or double-system control is adopted, the temperature of a freezing chamber can rise during refrigeration. When the refrigerating chamber is refrigerated and cooled, the compressor is started, the fan is started, the air door in the refrigerating chamber is started, the temperature in the refrigerating chamber is reduced, and because the refrigerating chamber is a single-system product, the air in the refrigerating chamber also enters the freezing chamber through the evaporator, and because the temperature in the refrigerating chamber is high, the hot air enters the freezing chamber, so that the temperature in the freezing chamber is increased, and the temperature in the freezing chamber is raised and fluctuates; after the refrigeration is finished, the door is closed, and when the temperature is reduced, the refrigeration temperature is reduced, the time is prolonged, and the power consumption is increased.
In view of this, the present invention has been proposed.
Disclosure of Invention
The invention provides an energy-saving control method for a refrigerating system of a refrigerator aiming at the technical problems.
In order to achieve the above purpose, the invention adopts the following technical scheme:
an energy-saving control method for a refrigerating system of a refrigerator,
the refrigerator refrigerating system comprises a compressor, a condenser, a capillary tube and an evaporator which are sequentially connected in series to form a loop; the energy-saving control method comprises the following steps:
when the refrigerating conditions are met, firstly precooling an evaporator, and then refrigerating;
monitoring the temperature of a freezing chamber in the refrigerating process, and increasing the rotation speed of a compressor and a fan to perform refrigeration when the temperature of the freezing chamber rises;
and after the refrigeration is finished, refrigerating.
Preferably, the temperature of the freezing chamber during the pre-cooling of the evaporator is recorded as the initial temperature T of the freezing chamber D0 The method comprises the steps of carrying out a first treatment on the surface of the The evaporator pre-cooling includes:
the compressor works;
acquisition of evaporator temperature T z0 Initial freezing chamber temperature T D0 And the evaporator temperature T z0 And initial freezing chamber temperature T D0 Comparing;
when T is z0 ＜T D0 -△T 0 When the precooling of the evaporator is finished; wherein DeltaT 0 > 0 ℃ and is constant.
Preferably, deltaT 0 ∈[2，8]Units: DEG C.
Preferably, the refrigerating and refrigerating includes:
obtaining the ambient temperature T h According to the ambient temperature T h Determining a corresponding compressor speed R yi Corresponding fan rotating speed R f ；
The compressor rotates at a speed R yi Running and rotating the fan at a speed R fi Operating, and simultaneously carrying out freezing temperature control on the freezing chamber;
when the freezing temperature is controlled to the freezing chamber temperature and the return rise is stopped, obtaining the refrigerating chamber temperature T C Temperature T of refrigerating chamber C And a refrigerating temperature threshold T C0 Comparing the temperature T of the refrigerating chamber C Reaching the refrigerating temperature threshold T C0 And ending the refrigeration.
Preferably, the compressor speed R is determined yi Corresponding fan rotating speed R f The specific method of (a) is as follows:
presetting n-1 temperature intervals [ T ] with sequentially increased temperature values 1 ，T 2 )、[T 2 ，T 3 )……[T i ，T i+1 )……、[T n-1 ，T n ) Wherein n is more than or equal to 1, i is a positive integer;
obtaining the ambient temperature T h And determining the ambient temperature T h At a preset temperature interval [ T ] i ，T i+1 ) The method comprises the steps of carrying out a first treatment on the surface of the Determining the corresponding compressor rotation speed R according to the determination result yi Corresponding fan rotating speed R fi 。
Preferably, the freezing temperature control includes:
acquiring a freezing chamber temperature T of a freezing chamber D1 And the temperature T of the freezing chamber D1 And the institute are connected withInitial freezing chamber temperature T during evaporator precooling D0 Comparing;
when T is D ＞T D0 And when the rotation speed of the compressor is increased, the rotation speed of the fan is increased.
Preferably, the rotation speed of the compressor is divided into a plurality of gears from low to high according to the rotation speed value; the rotating speed of the fan is divided into a plurality of gears from low to high according to the rotating speed value; when T is D ＞T D0 During the process, the rotation speed of the compressor is increased by one gear, and the rotation speed of the fan is increased by one gear.
Preferably, the stopping and returning of the temperature of the freezing chamber is specifically: obtaining the temperature change delta E of the freezing chamber D The temperature change delta E of the freezing chamber D When delta E is compared with 0 D And when the temperature is less than or equal to 0, judging that the temperature of the freezing chamber stops rising.
Preferably, the refrigeration specifically comprises:
acquiring the temperature change rate alpha of the freezing chamber D And the temperature change rate alpha of the freezing chamber D And a freezing chamber temperature change rate threshold alpha D0 Comparing;
when alpha is D ＞α D0 When the rotation speed of the compressor is reduced to the rated rotation speed R y0 And at rated rotation speed R y0 Operating; the rotating speed of the fan is reduced to the rated rotating speed R f0 And at rated rotation speed R f0 Operating;
at this time, the freezing chamber temperature T is obtained D1 And freezing chamber temperature T D1 And a freezing shutdown temperature threshold T DS Comparing; when the temperature T of the freezing chamber D1 Reaching the freezing shutdown temperature threshold T DS And when the compressor and the fan stop working, the refrigeration is finished.
A refrigerator for implementing the refrigerator refrigerating system energy-saving control method as described above.
Compared with the prior art, the invention has the advantages and positive effects that:
the invention provides an energy-saving control method of a refrigerator refrigerating system, which comprises a compressor, a condenser, a capillary tube and an evaporator which are sequentially connected in series to form a loop; the energy-saving control method comprises the following steps: when the refrigerating conditions are met, firstly precooling an evaporator, and then refrigerating; monitoring the temperature of a freezing chamber in the refrigerating process, and increasing the rotation speed of a compressor and a fan to perform refrigeration when the temperature of the freezing chamber rises; freezing and refrigerating after the cold storage and refrigerating are finished; the invention relates to an energy-saving control method for a refrigerator refrigerating system, which comprises the steps of pre-cooling an evaporator, refrigerating, controlling the temperature by freezing and refrigerating in sequence; the influence on the temperature of the freezing chamber in the refrigerating process is effectively reduced, and the refrigerating efficiency after the refrigerating process is finished is improved, so that the whole refrigerating process is optimized, and the aim of saving energy is fulfilled.
Drawings
Fig. 1 is a schematic view of a refrigerator according to the present invention;
FIG. 2 is a schematic view of a refrigerator system according to the present invention;
FIG. 3 is a graph showing temperature change of a refrigerating chamber, a freezing chamber and an evaporator of a conventional refrigerator during refrigeration;
FIG. 4 is a schematic block diagram of a defrosting system of the refrigerator of the present invention;
FIG. 5 is an overall control flow chart of the energy saving control method of the refrigeration system of the refrigerator of the present invention;
fig. 6 is a flowchart illustrating a specific control method of the energy saving control method of the refrigerating system of the refrigerator according to the present invention.
In the above figures: a compressor 1; a condenser 2; an evaporator 3; a fan 4; a capillary 5; a refrigerating damper 6;
a refrigerating air inlet duct 7; a refrigerating return air duct 8; a refrigerating chamber 10; a freezing chamber 11;
a control system 01; a setting module 20; a temperature acquisition module 30; a judgment module 40; a control module 50.
Detailed Description
The present invention will be further described with reference to specific examples so that those skilled in the art may better understand the present invention and practice it, but the scope of the present invention is not limited to the scope described in the specific embodiments. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be arbitrarily combined with each other.
It should be noted that the description of "first", "second", etc. in this disclosure is for descriptive purposes only and is not to be construed as indicating or implying a relative importance or implying an indication of the number of technical features being indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature.
In addition, the technical solutions of the embodiments may be combined with each other, but it is necessary to base that the technical solutions can be realized by those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should be considered to be absent and not within the scope of protection claimed in the present invention.
A refrigerator, as shown in fig. 1 to 2, includes a refrigerating chamber 10 and a freezing chamber 11; a main air duct with two ends communicated with the freezing chamber 11 is formed on the rear wall of the freezing chamber 11, and an evaporator 3 and a fan 4 are arranged in the main air duct; the back wall of the refrigerating chamber 10 is provided with a refrigerating air inlet duct 7 and a refrigerating air return duct 8. Wherein, one end of the main air duct is communicated with the refrigerating return air duct 8, and the other end is communicated with the refrigerating air inlet duct 7; in the embodiment, a refrigeration air door 6 is arranged between the main air duct and the refrigeration air inlet duct 7; to control connectivity between the main duct and the refrigerated return duct 8. The refrigerator has a refrigeration system; as shown in fig. 2, the refrigerating system of the single-system refrigerator includes a compressor 1, a condenser 2 communicating with an outlet of the compressor 1, a capillary tube 5, an evaporator 3 for providing cold to a freezing chamber 11 and a refrigerating chamber 10, a blower 4 for diffusing the cold generated by the evaporator 3 into the freezing chamber 11 and the refrigerating chamber 10, and a heating wire for defrosting the evaporator 3. Wherein the compressor 1, the condenser 2, the capillary tube 5 and the evaporator 3 are sequentially connected in series to form a loop.
During refrigeration, the refrigeration air door 6 is closed; under the action of the fan 4, air in the freezing chamber 11 enters the main air duct from one end of the main air duct, passes through the evaporator 3 in the main air duct, and returns to the freezing chamber 11 after being cooled by the evaporator 3, thereby realizing the cooling of the freezing chamber 11.
When in refrigeration, the refrigeration throttle 6 is opened; under the action of the fan 4, the air in the refrigerating chamber sequentially passes through the refrigerating return air duct 8, the main air duct, the refrigerating air door 6 and the refrigerating air inlet duct 7 and then returns to the refrigerating chamber 10. Wherein when passing through the main air duct, the air is cooled under the action of the evaporator 3 in the main air duct, thereby realizing the cooling of the refrigerating chamber. However, in the refrigerating process, when the air in the refrigerating chamber enters the main air duct, the air enters the freezing chamber through the connecting port of the main air duct and the freezing chamber; as shown in fig. 3, since the temperature of the air flowing out of the refrigerating chamber is high, the temperature of the freezing chamber is increased, causing the rise and fluctuation of the temperature of the freezing chamber; after the refrigeration is completed, the refrigeration air door is closed, and when the refrigeration is cooled, the refrigeration cooling time is prolonged, and the power consumption is increased.
As shown in fig. 4, the refrigerator is provided with a control system 01 for controlling the operation states of various components of the refrigerator to realize the control of the refrigerator. The control system 01 includes a setting module 20, a temperature acquisition module 30, a judgment module 40, and a control module 50.
The setting module 20 is configured to obtain various standard parameters of the refrigerator operation, including, but not limited to, a temperature parameter, a time parameter, and the like. In this embodiment, the setting module 20 obtains the temperature difference threshold Δt during the refrigerating process 0 Threshold value T of refrigerating temperature C0 Threshold value alpha of freezing temperature change rate D0 Threshold value T of freeze stop temperature DS . In this embodiment, the setting module 20 obtains a first preset temperature T 1 A second preset temperature T 2 … … ith preset temperature T i … … and nth preset temperature T n . Wherein T is 1 ＜T 2 ＜……＜T i ＜……＜T n . Wherein T is 1 And T is n The boundary values of the two environmental temperature ranges are set to specific values according to the actual environmental temperature range, and the actual environmental temperature range is set to the set environmental temperature range [ T ] 1 ，T n ]Is a subset of (a); accordingly, T 1 、T 2 、……T i ……、T n Ambient temperature range to be set [ T ] 1 ，T n ]Divided into n-1 temperature intervals [ T ] with sequentially increased temperature values i ，T i+1 ) N is more than or equal to 1, i is a positive integer. The setting module 20 is also usedAnd acquiring the corresponding relation between the ambient temperature and the rotating speed of the compressor and the corresponding relation between the ambient temperature and the rotating speed of the fan in the refrigerating and refrigerating process.
The temperature collection module 30 is used for collecting the freezing chamber temperature T of the freezing chamber in real time D Refrigerating chamber temperature T of refrigerating chamber C Evaporator temperature T of evaporator Z Ambient temperature T of the refrigerator h . Specifically, the temperature acquisition module 30 may include a freezing sensor disposed within a freezing chamber, a refrigerating sensor disposed within a refrigerating chamber, an evaporator sensor disposed on an evaporator, and an ambient temperature sensor in contact with an external environment. The freezing sensor is used for sensing and obtaining the freezing temperature and is used for obtaining the initial freezing temperature T during the precooling of the evaporator D0 And a freezing chamber temperature T during refrigeration and freezing D1 The refrigerating sensor is used for sensing and obtaining the temperature T of the refrigerating chamber C The evaporator sensor is used for sensing and obtaining the evaporator temperature T Z The ambient temperature sensor is used for sensing and obtaining the ambient temperature T h 。
Of course, in other embodiments, the freezing sensor, the refrigerating sensor and the evaporator sensor are all provided in plurality, and the temperature acquisition module 30 further includes a data processing unit for receiving the temperature values of the freezing chamber sensed by the plurality of freezing sensors respectively and processing the plurality of temperature values according to preset logic to obtain the initial freezing temperature T D0 And a freezing chamber temperature T during refrigeration and freezing D1 And during the refrigerating and refrigerating period, the data processing unit monitors the temperature T of the freezing chamber continuously twice according to preset logic D1 Processing to obtain the temperature change delta E of the freezing chamber D The method comprises the steps of carrying out a first treatment on the surface of the During refrigeration. The data processing unit monitors the temperature T of the freezing chamber continuously for a plurality of times (twice or more) according to preset logic D1 Processing to obtain the freezing temperature change rate alpha D . The data processing unit is also used for receiving the temperature values of the refrigerating chambers respectively sensed by the plurality of refrigerating sensors and processing the plurality of temperature values according to preset logic to obtain the temperature T of the refrigerating chambers C The method comprises the steps of carrying out a first treatment on the surface of the The data processing unit is also used forReceiving the temperature values of the environment sensed by the environment sensors and processing the temperature values according to preset logic to obtain an environment temperature T h 。
The judging module 40 is configured to receive the initial freezing temperature T obtained by the temperature collecting module 30 D0 Degree of cold temperature T D1 Temperature T of refrigerating chamber C Temperature variation delta E of freezing chamber D Rate of change of freezing temperature alpha D Ambient temperature T h The method comprises the steps of carrying out a first treatment on the surface of the And judging the temperature T of the freezing chamber at the set node D1 Initial freezing temperature T of freezing chamber when precooling with evaporator D0 Or the size relation of the freezing chamber temperature T D1 And a freezing shutdown temperature threshold T DS Is a size relationship of (2); the judging module 40 also judges the temperature T of the refrigerating chamber C A refrigeration temperature threshold T corresponding to the temperature threshold C0 Is a size relationship of (a). In addition, the judging module 40 is used for judging the temperature change delta E of the freezing chamber D Magnitude relation with 0, and freezing temperature change rate alpha D And a freezing temperature change rate threshold alpha D0 Is a size relationship of (a). The judging module 40 is used for receiving the ambient temperature T acquired by the temperature acquisition module 30 h And judge the ambient temperature T h And a first preset temperature T 1 A second preset temperature T 2 … … ith preset temperature T i … … and nth preset temperature T n To determine the ambient temperature T h Temperature interval [ T ] of i ，T i+1 )。
The control module 50 is connected to the setting module 20, the temperature collecting module 30, and the judging module 40, and performs information interaction with the setting module 20, the temperature collecting module 30, and the judging module 40, and controls the opening and closing states of the refrigeration system, the fan 4, the fan 6, the heating wire, and the like.
Specifically, as shown in fig. 5 to 6, an energy-saving control method for a refrigeration system of a refrigerator specifically includes: the evaporator pre-cooling is carried out preferentially during refrigeration, and refrigeration is carried out when the temperature of the evaporator reaches a set temperature; in the refrigerating and refrigerating process, the temperature of the freezing chamber is monitored, and when the temperature of the freezing chamber rises, the rotation speed of the compressor and the fan is increased so as to control the temperature of the freezing chamber to prevent the temperature from rising again; and stopping refrigerating when the temperature of the refrigerating chamber reaches a set refrigerating temperature threshold value, and refrigerating the freezing chamber.
The method comprises the following specific steps:
s1: precooling an evaporator; the method specifically comprises the following steps:
s11: the refrigerating conditions are met, and the compressor works; the evaporator sensor acquires the evaporator temperature T z0 The freezing sensor acquires an initial freezing chamber temperature T of the freezing chamber during pre-cooling of the evaporator D0 。
Specifically, when the temperature of the refrigerating chamber is higher than a set value, the refrigerating condition is met; it is of course not limited to the above condition settings.
S12: judgment T z0 ＜T D0 -△T 0 ? If yes, executing step S2; if not, executing the step S1;
when the refrigerating conditions are met, the evaporator is precooled, and the temperature T of the evaporator is kept z0 Temperature T of freezing chamber lower than synchronous temperature D0 (noted as initial freezing temperature) to ensure that when the refrigeration damper is opened and refrigeration is performed, the temperature of the evaporator is lower than the temperature of the freezing chamber, thereby reducing the influence of the refrigeration return air on the freezing chamber and controlling the temperature of the freezing chamber.
Delta T in this embodiment 0 > 0 ℃ and constant; in the present embodiment is set as DeltaT 0 ∈[2，8]Units: DEG C. The evaporator is precooled to enable the temperature of the evaporator to be lower than the temperature of the freezing chamber in the same period, when refrigeration is carried out, although refrigerating return air flow in the refrigerating process can enter the freezing chamber to affect the temperature of the freezing chamber, meanwhile, air passing through the evaporator is cooled and then returns to the freezing chamber to supplement cold energy of the freezing chamber, and therefore the influence of the refrigerating return air flow on the temperature of the freezing chamber is weakened and even offset. At least in the initial stage of the refrigerating and refrigerating in the step S2, the temperature in the refrigerating chamber can be effectively controlled.
S2: refrigerating, refrigerating and freezing to control the temperature; the method specifically comprises the following steps:
s21: monitoring ambient temperature T h Determining the ambient temperature T h The preset environment is locatedTemperature interval [ T ] i ，T i+1 )；
Specifically, the ambient temperature T is monitored h Judging the ambient temperature T h And a first preset temperature T 1 A second preset temperature T 2 … … ith preset temperature T i … … and nth preset temperature T n To determine the ambient temperature T h The preset environmental temperature interval [ T ] is located i ，T i+1 )；
S22: according to T h Determining the rotational speed R of the compressor yi Corresponding fan rotating speed R fi ；
The method comprises the following steps: by the following table setting, according to [ T ] determined in step S21 i ，T i+1 ) Determining a corresponding compressor speed R yi Fan speed R fi ；
| Ambient temperature T h | Compressor rotational speed | Fan speed |
| [T 1 ,T 2 ) | R y1 | R f1 |
| [T 2 ,T 3 ) | R y2 | R f2 |
| …… | …… | …… |
| [T i ,T i+1 ) | R yi | R fi |
| …… | …… | …… |
| [T n-1 ,T n ) | R y(n-1) | R f(n-1) |
Wherein a=t i+1 -T i ，A∈[3，11]Units: DEG C.
As the temperature value of the ambient temperature interval increases, the compressor speed R yi Fan speed R fi In an increasing trend; in this embodiment, B is E [250, 350 ]]Units: rpm.
S23: the compressor rotates at a speed R yi Running and rotating the fan at a speed R fi In operation, the freezing sensor acquires the freezing chamber temperature T of the freezing chamber D1 ；
In step S23, the rotational speeds of the compressor and the fan are both specific rotational speeds at the corresponding ambient temperatures. So as to more save energy and efficiently cool down.
S24: temperature T of freezing chamber D1 And initial freezing chamber temperature T D0 Comparing and judging T D ＞T D0 ? If yes, the rotation speed of the compressor is increased, and the rotation speed of the fan is increased; if not, executing step S23;
in step S24, the real-time freezing temperature is compared with the initial freezing temperature, the temperature change condition of the freezing chamber is obtained in time, and when the temperature of the freezing chamber is increased, the rotation speed of the compressor and the rotation speed of the fan are increased, so that the refrigeration efficiency is improved, the freezing chamber is further supplemented with cold, and the temperature of the freezing chamber is effectively controlled.
In the embodiment, the gears of the rotation speeds of the compressor and the fan are divided; specifically, in this embodiment, the rotation speed of the compressor is divided into ten gear steps from low to high according to the rotation speed value; the rotating speed of the fan is divided into three gears from low to high according to the rotating speed value; in this embodiment, the compression speed is first gear every 300 rpm. It should be understood that the specific number of gear divisions is not limited to the above settings, which may be divided according to the specific circumstances.
In the present invention, the compressor and the fan rotational speed in step S21 are not the highest gear set, and there is room for increasing the gear. In this embodiment, in step S24, the rotation speed of the compressor is increased by one gear, and the rotation speed of the fan is also increased by one gear.
In the pre-cooling process of the evaporator in the step S1, only the compressor works, the fan does not operate, heat exchange between the evaporator and the freezing chamber is slow, the temperature of the freezing chamber is less influenced by the temperature reduction of the evaporator, and the temperature of the freezing chamber is kept relatively stable during the pre-cooling process of the evaporator. Initial freezing chamber temperature T in this step S22 D0 The freezing temperature obtained by the freezing evaporator for many times can be used as the initial freezing chamber temperature T in the pre-cooling process of the evaporator in the step S1 D0 . In this embodiment, the first judgment in the pre-cooling process of the evaporator is set to satisfy T z0 ＜T D0 -△T 0 The temperature of the freezing chamber at the time of ending in step S1 and entering step S2 is taken as the initial freezing temperature T D0 。
S25: obtaining the temperature change delta E of the freezing chamber D ；
The freezing sensor monitors and acquires the temperature of the freezing chamber, and the freezing chamber temperature obtained by two continuous times is subjected to difference to obtain the temperature variation delta E of the freezing chamber D . Specifically, in this embodiment, the temperature of the freezing chamber is obtained twice in succession and is denoted as T D11 、T D12 Subtracting the temperature of the freezing chamber obtained in the previous time from the temperature of the freezing chamber obtained in the previous time to obtain the variation delta E of the temperature of the freezing chamber D ，△E D ＝T D12 -T D11 . To characterize coldTrend of temperature change in freezing chamber.
S26: the temperature change delta E of the freezing chamber D Comparing with 0, determining DeltaE D Is less than or equal to 0? If yes, go to step S27; if not, executing step S25;
through delta E D The relative relation with 0 can judge whether the temperature of the freezing chamber is in a rising state or not so as to realize monitoring and timely controlling the temperature of the freezing chamber when the temperature of the freezing chamber rises. In the invention, the rotation speed is increased through both the compressor and the fan to timely supplement the cooling capacity to the freezing chamber in the temperature rise process, and the temperature of the freezing chamber is timely controlled; meanwhile, the temperature reduction speed of the refrigerating chamber is increased, and the influence on the temperature of the freezing chamber is reduced. The method can effectively control the temperature of the freezing chamber during the refrigeration and refrigeration, can maintain the temperature of the freezing chamber in a relatively stable low-temperature state, and can accelerate the reduction of the temperature of the refrigeration chamber.
S27: the refrigerating sensor obtains the temperature T of the refrigerating chamber C ；
S28: temperature T of refrigerating chamber C And a refrigerating temperature threshold T C0 Comparing and judging T C ＞T C0 ? If yes, go to step S27; if not, closing the refrigeration air door, and executing the step S3;
under the condition of effectively controlling the temperature in the refrigerating chamber, the temperature in the refrigerating chamber is rapidly reduced; monitoring the temperature of the refrigerating chamber through steps S27 and S28, and comparing with a refrigerating temperature threshold T C0 Comparing to reach the set refrigerating temperature threshold T at the refrigerating chamber temperature C0 And closing the refrigeration air door to finish refrigeration.
In the invention, the step S2 effectively solves the problem that the temperature in the refrigerating chamber is influenced to rise during the refrigerating and refrigerating period, so as to control the temperature in the refrigerating chamber in a relatively stable low-temperature state.
S3: freezing and refrigerating; the method comprises the following steps:
s31: acquiring the temperature change rate alpha of the freezing chamber D ；
S32: judging alpha D ＞α D0 ? If yes, go to step S33; if not, executing step S32;
s33: the rotation speed of the compressor is reduced toRated rotation speed R y0 And at rated rotation speed R y0 The operation is carried out by the method,
the rotating speed of the fan is reduced to the rated rotating speed R f0 And at rated rotation speed R f0 Operating;
the temperature of the refrigerating chamber reaches a set refrigerating temperature threshold T C0 When the refrigerating air door is closed, the temperature of the evaporator is rapidly reduced due to the reduction of the heat load, and the improvement of the system efficiency is not facilitated. Steps S31-S33 monitoring the freezing chamber temperature change Rate alpha D And at the freezing chamber temperature change rate alpha D Greater than a set freezing chamber temperature change rate threshold alpha D0 When the rotation speeds of the compressor and the fan are reduced to their rated rotation speeds; the efficiency of the refrigerating system can be effectively improved.
Specifically, in step S31, the obtained freezing chamber temperature change rate α is obtained by continuously obtaining the freezing chamber temperature and the time corresponding thereto a plurality of times D The method comprises the steps of carrying out a first treatment on the surface of the In the present embodiment, it is set to be two times in succession at time t 1 When the freezing temperature T' is obtained D11 At time t 2 When the freezing temperature T' is obtained D12 Rate of change of freezer compartment temperature alpha D ＝(T` D12 -T` D11 )/(t 2 -t 1 )。
In addition, in this embodiment, the rotation speed of the compressor and the rotation speed of the fan are reduced step by step according to the set gear, and the rated rotation speed is maintained to run after being reduced to the respective rated rotation speeds.
S34: acquiring temperature T of freezing chamber D1 ；
S35, judging T D1 ＞T DS ? If yes, stopping the compressor and the fan; if not, executing step S34;
after the rotational speeds of the compressor and the blower are reduced to their rated rotational speeds, the temperature of the freezing chamber is monitored by steps S34 and S35 and is compared with a freezing stop temperature threshold T DS Comparing to reach the set freezing stop temperature threshold T at the temperature of the refrigerating chamber DS And when the compressor and the fan are stopped, the refrigeration is finished.
The step S3 is to further control the temperature of the freezing chamber after the refrigeration is finished; through the control of the steps S1 and S2, the temperature in the refrigerating chamber is maintained in a relatively stable low-temperature state, and the step S3 can rapidly finish refrigeration, so that the purposes of high efficiency and energy conservation are achieved.
The invention relates to an energy-saving control method of a refrigerator refrigerating system, which sequentially carries out pre-cooling, refrigeration, freezing and refrigerating of an evaporator; monitoring the temperature of a freezing chamber in the refrigerating process, and increasing the rotation speed of a compressor and a fan to perform refrigeration when the temperature of the freezing chamber rises; the control method can reduce the influence on the temperature of the freezing chamber in the refrigerating process, and improve the refrigerating efficiency after the refrigerating process is finished, thereby optimizing the whole refrigerating process and realizing the aim of saving energy; meanwhile, the fresh-keeping effect of the freezing chamber on food materials is effectively ensured.
The present invention is not limited to the above-mentioned embodiments, and any equivalent embodiments which can be changed or modified by the technical content disclosed above can be applied to other fields, but any simple modification, equivalent changes and modification made to the above-mentioned embodiments according to the technical substance of the present invention without departing from the technical content of the present invention still belong to the protection scope of the technical solution of the present invention.
Claims (8)
1. The energy-saving control method for the refrigerating system of the refrigerator is characterized by comprising the following steps of:
the refrigerator refrigerating system comprises a compressor, a condenser, a capillary tube and an evaporator which are sequentially connected in series to form a loop; the energy-saving control method comprises the following steps:
when the refrigerating conditions are met, firstly precooling an evaporator, and then refrigerating;
monitoring the temperature of a freezing chamber in the refrigerating process, and increasing the rotation speed of a compressor and a fan to perform refrigeration when the temperature of the freezing chamber rises;
freezing and refrigerating after the cold storage and refrigerating are finished;
the temperature of the freezing chamber during the pre-cooling of the evaporator is recorded as the initial temperature T of the freezing chamber D0 The method comprises the steps of carrying out a first treatment on the surface of the The evaporator pre-cooling includes:
the compressor works;
acquisition of evaporator temperature T z0 Initial freezing chamber temperature T D0 And the evaporator temperature T z0 And initial freezing chamber temperature T D0 Comparing;
when T is z0 ＜T D0 －△T 0 When the precooling of the evaporator is finished; wherein DeltaT 0 > 0 ℃ and constant;
the refrigeration comprises:
obtaining the ambient temperature T h According to the ambient temperature T h Determining a corresponding compressor speed R yi Corresponding fan rotating speed R f ；
The compressor rotates at a speed R yi Running and rotating the fan at a speed R fi Operating, and simultaneously carrying out freezing temperature control on the freezing chamber;
when the freezing temperature is controlled to the freezing chamber temperature and the return rise is stopped, obtaining the refrigerating chamber temperature T C Temperature T of refrigerating chamber C And a refrigerating temperature threshold T C0 Comparing the temperature T of the refrigerating chamber C Reaching the refrigerating temperature threshold T C0 And ending the refrigeration.
2. The energy saving control method of a refrigerating system of a refrigerator according to claim 1, wherein: deltaT 0 ∈[2，8]Units: DEG C.
3. The energy saving control method of a refrigerating system of a refrigerator according to claim 1, wherein: determining a compressor speed R yi Corresponding fan rotating speed R f The specific method of (a) is as follows:
presetting n-1 temperature intervals [ T ] with sequentially increased temperature values 1 ，T 2 )、[T 2 ，T 3 )……[T i ，T i+1 )……、[T n-1 ，T n ) Wherein n is more than or equal to 1, i is a positive integer;
obtaining the ambient temperature T h And determining the ambient temperature T h At a preset temperature interval [ T ] i ，T i+1 ) The method comprises the steps of carrying out a first treatment on the surface of the Determining a corresponding compressor rotation based on the determinationSpeed R yi Corresponding fan rotating speed R fi 。
4. The energy saving control method of a refrigerating system of a refrigerator according to claim 1, wherein: the freezing temperature control comprises:
acquiring a freezing chamber temperature T of a freezing chamber D1 And the temperature T of the freezing chamber D1 Initial freezing chamber temperature T when precooling with the evaporator D0 Comparing;
when T is D ＞T D0 And when the rotation speed of the compressor is increased, the rotation speed of the fan is increased.
5. The energy saving control method of a refrigerating system of a refrigerator according to claim 4, wherein: the rotation speed of the compressor is divided into a plurality of gears from low to high according to the rotation speed value; the rotating speed of the fan is divided into a plurality of gears from low to high according to the rotating speed value; when T is D ＞T D0 During the process, the rotation speed of the compressor is increased by one gear, and the rotation speed of the fan is increased by one gear.
6. The energy saving control method of a refrigerating system of a refrigerator according to claim 1, wherein: the freezing chamber temperature stop rising specifically comprises the following steps: obtaining the temperature change delta E of the freezing chamber D The temperature change delta E of the freezing chamber D When delta E is compared with 0 D And when the temperature is less than or equal to 0, judging that the temperature of the freezing chamber stops rising.
7. The energy saving control method of a refrigerating system of a refrigerator according to claim 1, wherein: the freezing refrigeration specifically comprises the following steps:
acquiring the temperature change rate alpha of the freezing chamber D And the temperature change rate alpha of the freezing chamber D And a freezing chamber temperature change rate threshold alpha D0 Comparing;
when alpha is D ＞α D0 When the rotation speed of the compressor is reduced to the rated rotation speed R y0 And at rated rotation speed R y0 Operating; the rotating speed of the fan is reduced to the rated rotating speed R f0 And at rated rotation speed R f0 Operating;
at this time, the freezing chamber temperature T is obtained D1 And freezing chamber temperature T D1 And a freezing shutdown temperature threshold T DS Comparing; when the temperature T of the freezing chamber D1 Reaching the freezing shutdown temperature threshold T DS And when the compressor and the fan stop working, the refrigeration is finished.
8. A refrigerator, characterized in that: the refrigerator is used for realizing the energy-saving control method of the refrigerating system of the refrigerator according to any one of claims 1 to 7.
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Address after: 266736 No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant after: Hisense refrigerator Co.,Ltd. Address before: 266736 No. 8 Haixin Avenue, Nancun Town, Pingdu City, Qingdao City, Shandong Province Applicant before: HISENSE (SHANDONG) REFRIGERATOR Co.,Ltd. |
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