CN114608258A - Defrosting control method of refrigerator refrigerating system based on electronic expansion valve - Google Patents
Defrosting control method of refrigerator refrigerating system based on electronic expansion valve Download PDFInfo
- Publication number
- CN114608258A CN114608258A CN202210235671.0A CN202210235671A CN114608258A CN 114608258 A CN114608258 A CN 114608258A CN 202210235671 A CN202210235671 A CN 202210235671A CN 114608258 A CN114608258 A CN 114608258A
- Authority
- CN
- China
- Prior art keywords
- defrosting
- refrigerator
- time
- expansion valve
- electronic expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000010257 thawing Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000005057 refrigeration Methods 0.000 claims abstract description 49
- 238000001704 evaporation Methods 0.000 claims description 20
- 230000008020 evaporation Effects 0.000 claims description 17
- 230000009471 action Effects 0.000 claims description 9
- 238000005265 energy consumption Methods 0.000 abstract description 6
- 230000008859 change Effects 0.000 abstract description 5
- 239000003507 refrigerant Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
- F25D21/008—Defroster control by timer
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2347/00—Details for preventing or removing deposits or corrosion
- F25B2347/02—Details of defrosting cycles
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting control method of a refrigerator refrigerating system based on an electronic expansion valve, and relates to the technical field of refrigerating equipment. The invention comprises the following steps: presetting system parameters; including a time threshold TM(ii) a Step two: recording the time from the first normal refrigeration operation to the shutdown after the refrigerator is defrosted and recording as T1Recording the time from the ith normal refrigeration to the shutdown of the refrigerator as Ti(ii) a Step three: judging defrosting starting conditions; involving calculating the time increment value Δ T, i.e. Δ T ═ Ti‑T1(ii) a And comparing Δ T with a time threshold TMIf Δ T < TMReturning to the step two; if Δ T is not less than TMThen the refrigerating system is started to defrost,and returning to the step two after defrosting is finished. The invention detects the time increment value delta T of the refrigeration time change of the refrigeration system and compares the delta T with the time threshold value TMTherefore, the frosting degree of the evaporator can be accurately judged, and the problem that the energy consumption of the refrigerator is increased due to the fact that the frosting degree cannot be accurately judged at present is solved.
Description
Technical Field
The invention belongs to the technical field of refrigeration equipment, and particularly relates to a defrosting control method of a refrigerator refrigeration system based on an electronic expansion valve.
Background
At present, in a refrigeration system of a common air-cooled refrigerator in the market, a finned evaporator is generally adopted as an evaporator, and air heat exchange is carried out in a fan forced air circulation mode. When the refrigerator operates and the temperature of a refrigerant in the evaporator is far below 0 ℃, moisture of indoor air in the refrigerator is gradually condensed in the evaporator to form a frosting layer, and the heat absorption capacity of the evaporator, the efficiency of the system and the COP are obviously reduced along with the increase of the frosting degree; when the frosting layer reaches a certain thickness and even blocks the fins of the evaporator to influence the air circulation, the refrigeration system of the refrigerator must be shut down at the moment, and the evaporator is defrosted in time.
However, it is difficult to accurately determine the frost formation, and the frost formation process and degree are related to many factors, such as the ambient temperature of the air around the evaporator, the ambient humidity, the wind speed blowing through the evaporator, and so on.
The starting defrosting judgment condition of various existing defrosting control schemes usually takes the fixed time of the accumulative running of a compressor in a refrigerator refrigerating system as a defrosting interval reference value; or according to the ambient temperature of the refrigerator, a fixed natural defrosting time is preset in the refrigerator controller in advance, so that the influence of various factors on the frosting phenomenon is difficult to be comprehensively considered in the conventional refrigerator defrosting control scheme, and the defrosting cannot be accurately and efficiently performed.
In the process of using the refrigerator, along with the change of the ambient temperature, humidity and wind speed of the evaporator, the difference of the opening and closing of the door of the refrigerator, the ambient temperature and the load condition of food, the natural defrosting time based on the accumulated running time of the compressor or the solidification of the ambient temperature is only used as the defrosting judgment condition, so that the frosting degree is difficult to accurately judge and defrosting is difficult to carry out in time.
Therefore, the defrosting action can be started either too early or too late, defrosting can not be carried out as required, frosting is serious in some cases, and the defrosting action is still not started by a refrigerator refrigerating system; and if some frosts are slightly frosted or even not frosted, the refrigerator refrigerating system starts the defrosting action, so that the energy consumption of the refrigerator is increased.
Disclosure of Invention
The invention aims to provide a defrosting control method of a refrigerator refrigerating system based on an electronic expansion valve, which detects the change of refrigerating time of the refrigerating systemBy increasing the value of time Δ T and by comparing Δ T with a time threshold TMTherefore, the frosting degree of the evaporator can be accurately judged, and the problem that the energy consumption of the refrigerator is increased due to the fact that the frosting degree cannot be accurately judged at present is solved.
In order to solve the technical problems, the invention is realized by the following technical scheme:
the invention relates to a defrosting control method of a refrigerator refrigerating system based on an electronic expansion valve, which comprises the following steps:
the method comprises the following steps: presetting system parameters; including a time threshold TM；
Step two: recording the time from normal refrigeration to shutdown in the first operation after defrosting of the refrigerator, and recording as T1Recording the time from the ith normal refrigeration to the shutdown of the refrigerator as TiWherein i is 2, 3 … N;
step three: judging defrosting starting conditions; involving calculating the time increment value Δ T, i.e. Δ T ═ Ti-T1(ii) a And comparing Δ T with a time threshold TMIf Δ T < TMReturning to the step two; if Δ T is not less than TMAnd starting the refrigeration system for defrosting, and returning to the step two after defrosting is finished.
As a preferred embodiment of the present invention, the time threshold T is set to be greater than a predetermined threshold valueMIs 120-180 min.
As a preferred technical solution of the present invention, the first step further includes: presetting a system parameter total time threshold TMAX；
Step two, the accumulated running time of the compressor, which is calculated after the defrosting action is finished, is recorded as T;
step three also comprises comparing the accumulated running time T of the compressor with the total time threshold value TMAXIf T is less than TMAXReturning to the step two; if T is greater than or equal to TMAXAnd starting the refrigeration system for defrosting, and returning to the step two after defrosting is finished.
As a preferred technical solution of the present invention, the total time threshold T isMAXIs 16-72 h.
Ice according to claim 4, based on an electronic expansion valveThe defrosting control method of the tank refrigerating system is characterized in that the total time threshold T isMAXIs 8-16 h.
As a preferred technical solution of the present invention, the first step further includes presetting a system parameter evaporation temperature threshold TEMP(ii) a The second step also comprises detecting the temperature of the evaporator and recording as TZ；
Step three also comprises a comparison TZWith a threshold value T of the evaporation temperatureEMPIf T isZ＜TEMPIf yes, starting the refrigerating system for defrosting, and returning to the step two after defrosting is finished; if TZ≥TEMPAnd returning to the step two.
As a preferable technical scheme of the invention, the evaporation temperature threshold TEMPIs-26 ℃ to 40 ℃ and has an evaporation temperature threshold TEMPIs divided into a plurality of gradients in sequence and is in positive correlation with the ambient temperature.
The invention has the following beneficial effects:
the invention is used for the time T from the normal refrigeration of the first operation to the shutdown1And the time T from the ith normal refrigeration to the shutdown of the refrigeratoriAnd calculating the time increment value delta T of the refrigeration time change of the refrigeration system and comparing the delta T with the time threshold value TMWhether the refrigerating time of the refrigerator is increased or not is determined through a comparison result, so that the frosting degree of the evaporator is accurately judged, the refrigerating system of the refrigerator can accurately defrost, the normal and efficient operation of the refrigerating system of the refrigerator is guaranteed, and the whole energy consumption of the refrigerator is favorably reduced.
Of course, it is not necessary for any product in which the invention is practiced to achieve all of the above-described advantages at the same time.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a flow chart of a defrosting control method for a refrigeration system of a refrigerator based on an electronic expansion valve according to the present invention;
FIG. 2 is a schematic diagram of a refrigerator refrigeration system based on an electronic expansion valve according to the present invention;
in the drawings, the components represented by the respective reference numerals are listed below:
1-compressor, 2-condenser, 3-electronic expansion valve, 4-evaporator, 51-first temperature sensor, 52-second temperature sensor.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example one
Referring to fig. 2, an air-cooled refrigerator refrigeration system, which is a refrigerator refrigeration system based on an electronic expansion valve according to the present application, includes a refrigeration cycle loop formed by sequentially connecting a compressor 1, a condenser 2, an electronic expansion valve 3, and an evaporator 4 in series. Meanwhile, the evaporator 4 is provided with a first temperature sensor 51 and a second temperature sensor 52.
As shown in fig. 1, the invention relates to a defrosting control method for a refrigerator refrigeration system based on an electronic expansion valve, which comprises the following steps:
the method comprises the following steps: presetting system parameters; including a time threshold TMTime threshold value TMIs 120-180 min.
Step two: recording the time from the first normal refrigeration operation to the shutdown after the refrigerator is defrosted and recording as T1In the condition, the time from normal refrigeration to shutdown of the refrigerator under the condition of no frost is adopted; recording the time from the ith normal refrigeration to the shutdown of the refrigerator as TiWherein i is 2, 3 … N, N is positive integer, and the frosting condition is more increased along with the use of the refrigerator, and T is in turniIncreases as the number of times of cooling increases.
Step three: judging defrosting starting conditions; involving calculating the time increment value Δ T, i.e. Δ T ═ Ti-T1(ii) a And comparing Δ T with a time threshold TMIf Δ T < TMAnd explaining the time from the current refrigeration to the end of the refrigerator, and if the fluctuation of the refrigeration time is in the range compared with the refrigeration time under the condition of no frost, judging that no frost is formed or the frost forming degree does not need to start defrosting at the moment, and returning to the step two.
If Δ T is not less than TMThe time from the refrigeration to the end is explained, compared with the condition of no frost, the fluctuation of the refrigeration time is larger, namely, the frosting on the surface of the evaporator is judged, so that the time from the refrigeration to the shutdown temperature of the refrigerator is influenced, the compressor needs longer time to refrigerate the refrigerator to the target temperature, therefore, the defrosting needs to be carried out on the evaporator at the moment, the defrosting is started through the refrigeration system, the step two is returned after the defrosting is finished, namely, the T is collected again1And Ti。
At the same time, the time threshold TMThe proportional threshold K can be replaced by a proportional relation delta (T) instead, the value of the K is 50% -100%, and the time increment value delta T can be replaced by a proportional relation delta (T)i-T1)/T1Similarly, when delta is smaller than K, the defrosting is judged to be unnecessary, and when delta is larger than or equal to K, the refrigerating system is started to defrost.
The refrigerator refrigerating system can gradually reduce the heat absorption capacity of the evaporator and the evaporation capacity of the refrigerant along with the occurrence of frosting on the evaporator and the deepening of the frosting degree, and in order to maintain the stability of the temperature of the refrigerator compartment, the opening degree of the electronic expansion valve can automatically and continuously reduce to adapt to the continuous aggravation of the frosting of the evaporator, so that the refrigerating time is prolonged.
Therefore, according to the change of the operation parameter of the refrigeration system after the opening degree of the electronic expansion valve is changed, the delta T is compared with the time threshold value TMTherefore, the frosting degree of the evaporator is accurately judged, the defrosting action is timely and accurately started, the normal and efficient operation of a refrigerator refrigerating system is ensured, and the reduction of the overall energy consumption of the refrigerator is facilitated.
Example two
As shown in the figure1, on the basis of the first implementation, the first step further comprises: presetting a total time threshold T of system parametersMAX；TMAXThe accumulated running time of the compressor counted from the end of the last defrosting action or the total duration of the power-on cooling of the refrigerator.
TMAXIt is generally closely related to the ambient temperature, the higher its TMAXThe smaller the value, the cumulative operating time T of the compressor is generally used in refrigeratorsMAXThe refrigerating time T is usually 8-16 h and is defined by the natural operation timeMAXThe total duration of the refrigerator power-on refrigeration is 16-72 h.
And step two, recording the accumulated running time of the compressor, which is counted after the defrosting action is finished, as T.
Judging the starting condition of defrosting in the third step, and comparing the accumulated running time T of the compressor with the total time threshold TMAXIf T is less than TMAXIf the accumulated running time of the compressor is not up to the set value, the refrigerating running time of the compressor is short, and therefore the evaporator is not frosted, defrosting is not needed, and the step two is returned.
If T is greater than or equal to TMAXAnd if yes, the accumulated compression running time is longer, and the evaporator is easy to frost due to long-time refrigeration, so that the defrosting is started through the refrigeration system, and the step two is returned after the defrosting is finished, namely the accumulated compressor running time is collected again and recorded as T.
The accumulated running time T of the compressor is compared with the total time threshold T in the embodimentMAXThe judgment of the defrosting start condition is executed in parallel with the first embodiment, namely, the delta T is more than or equal to TMAnd T is not less than TMAXWhen any one of the conditions is met, the refrigerating system starts defrosting.
EXAMPLE III
As shown in fig. 1, on the basis of the first embodiment or the second embodiment, the first step further includes presetting a system parameter evaporating temperature threshold TEMP. Wherein the evaporation temperature threshold TEMPIs-26 ℃ to 40 ℃ and has an evaporation temperature threshold TEMPIs divided into a plurality of gradients, e.g. six, in turn and is related to the ambient temperaturePositive correlation, taking a refrigerator with refrigerant R600a as an example, the evaporation temperature threshold TEMPThe correspondence with ambient temperature is shown in the following table:
the opening degree of the electronic expansion valve under the combination of various environmental temperatures and various frequencies of a compressor in the refrigeration system under the working condition of no frosting is measured, and then the opening degree of the electronic expansion valve under the working condition of frosting in different degrees is measured, and the related numerical values of the start-up and shutdown time of the refrigeration system, the temperature of an evaporator and the like under the condition of the opening degree are measured, so that the data of the upper rule are obtained.
I.e. the evaporation temperature threshold TEMPIs a dynamic value, when the ambient temperature changes, the evaporation temperature threshold TEMPThe value of (A) is automatically adjusted correspondingly, if the ambient temperature is 25 ℃, the evaporation temperature threshold value T isEMPThe value is between-32 ℃ and-36 ℃.
Step two also includes detecting the evaporator temperature and recording as TZ. I.e. the real time temperature of the evaporator.
Judging defrosting starting conditions, and comparing TZWith a threshold value T of the evaporation temperatureEMPIf T isZ＜TEMPThen, the evaporator temperature T is indicatedZBelow the evaporation temperature threshold T at the ambient temperature at that timeEMPAnd judging that the evaporator is frosted, so that the refrigeration system is started to defrost, and returning to the step two after defrosting is finished.
If TZ≥TEMPIf the temperature of the evaporator is normal, judging that the frosting does not occur, returning to the step, collecting the measured temperature of the evaporator again and recording the temperature as TZ。
In this example, the defrosting start condition was judged by comparing TZWith a threshold value T of the evaporation temperatureEMPIn parallel with embodiment one, i.e. Δ T ≧ TMAnd TZ＜TEMPWhen any one of the conditions is met, the refrigerating system starts defrosting.
Meanwhile, the embodiment can be implemented on the basis of the implementation two, namely, Delta T is more than or equal to TM、T≥TMAXAnd TZ＜TEMPThree conditions are implemented in parallel, when any one of the three conditions is met, the refrigerating system starts defrosting, so that the refrigerating system of the refrigerator is combined with the refrigerating running time of the refrigerator, and compared with the refrigerating time in the normal running condition without frosting, the increment delta T of the refrigerating time, the accumulated running time T of the compressor and the evaporator temperature T under the environment temperature factorZThe starting defrosting device has the advantages that starting and stopping time, evaporating temperature and the like and the ambient temperature are fully considered in starting defrosting adjustment, so that the frosting degree of the evaporator can be accurately judged, timely and accurate starting defrosting action is realized, normal and efficient operation of a refrigerator refrigerating system is guaranteed, and the whole energy consumption of the refrigerator is favorably reduced.
In the description herein, references to the description of "one embodiment," "an example," "a specific example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the invention disclosed above are intended to be illustrative only. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, to thereby enable others skilled in the art to best utilize the invention. The invention is limited only by the claims and their full scope and equivalents.
Claims (7)
1. A defrosting control method of a refrigerator refrigerating system based on an electronic expansion valve is characterized by comprising the following steps:
the method comprises the following steps: presetting system parameters; including a time threshold TM；
Step two: recording the time from the first normal refrigeration operation to the shutdown after the refrigerator is defrosted and recording as T1Recording the time from the ith normal refrigeration to the shutdown of the refrigerator as TiWherein i is 2, 3 … N;
step three: judging defrosting starting conditions;
involving calculating the time increment value Δ T, i.e. Δ T ═ Ti-T1(ii) a And comparing Δ T with a time threshold TMIf Δ T < TMReturning to the step two; if Δ T is not less than TMAnd starting the refrigeration system for defrosting, and returning to the step two after defrosting is finished.
2. The electronic expansion valve-based defrosting control method for a refrigeration system of a refrigerator as claimed in claim 1, wherein the time threshold T is setMIs 120-180 min.
3. The defrosting control method for a refrigeration system of a refrigerator based on an electronic expansion valve as claimed in claim 1, wherein the first step further comprises: presetting a system parameter total time threshold TMAX；
Step two, the accumulated running time of the compressor, which is calculated after the defrosting action is finished, is recorded as T;
step three also comprises comparing the accumulated running time T of the compressor with the total time threshold value TMAXIf T is less than TMAXReturning to the step two; if T is greater than or equal to TMAXAnd starting the refrigeration system for defrosting, and returning to the step two after defrosting is finished.
4. The electronic expansion valve-based defrosting control method for a refrigeration system of a refrigerator as claimed in claim 1, wherein the total time threshold T isMAXIs 16-72 h.
5. The refrigeration system of claim 4 of a refrigerator based on an electronic expansion valve-A unified frost control method, characterized in that said total time threshold TMAXIs 8-16 h.
6. The defrosting control method of a refrigerator refrigeration system based on an electronic expansion valve as claimed in claim 1 or 3, wherein the step one further comprises presetting a system parameter evaporating temperature threshold TEMP(ii) a Step two also includes detecting the evaporator temperature and recording as TZ；
Step three also comprises a comparison TZWith a threshold value T of the evaporation temperatureEMPIf T isZ＜TEMPIf yes, starting the refrigerating system for defrosting, and returning to the step two after defrosting is finished; if TZ≥TEMPAnd returning to the step two.
7. The electronic expansion valve-based defrosting control method for a refrigeration system of a refrigerator as claimed in claim 6, wherein the evaporation temperature threshold T is set toEMPIs-26 ℃ to 40 ℃ and has an evaporation temperature threshold TEMPIs divided into a plurality of gradients in sequence and is in positive correlation with the ambient temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210235671.0A CN114608258A (en) | 2022-03-11 | 2022-03-11 | Defrosting control method of refrigerator refrigerating system based on electronic expansion valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210235671.0A CN114608258A (en) | 2022-03-11 | 2022-03-11 | Defrosting control method of refrigerator refrigerating system based on electronic expansion valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114608258A true CN114608258A (en) | 2022-06-10 |
Family
ID=81863976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210235671.0A Pending CN114608258A (en) | 2022-03-11 | 2022-03-11 | Defrosting control method of refrigerator refrigerating system based on electronic expansion valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114608258A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115717806A (en) * | 2022-11-23 | 2023-02-28 | 江苏省精创电气股份有限公司 | Intelligent defrosting method, device, storage medium and electronic terminal for cold storage |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030147A1 (en) * | 1999-02-19 | 2000-08-23 | Ranco Incorporated of Delaware | Controller and method for controlling the temperature in a refrigerator |
| DE202005012456U1 (en) * | 2005-07-08 | 2006-11-16 | Liebherr-Hausgeräte Ochsenhausen GmbH | Fridge and / or freezer |
| CN102954666A (en) * | 2012-11-21 | 2013-03-06 | 广东奥马电器股份有限公司 | Defrosting control method for refrigerator |
| CN104236004A (en) * | 2013-06-19 | 2014-12-24 | 广东美的制冷设备有限公司 | Defrosting control method and device for heat pump system |
| CN107940873A (en) * | 2017-11-17 | 2018-04-20 | 合肥美的电冰箱有限公司 | Defrosting method, defrosting system, computer-readable recording medium and refrigeration plant |
| CN108036556A (en) * | 2017-12-22 | 2018-05-15 | 珠海恩盛能源科技有限公司 | One kind defrosting and the relevant heat pump control mode of ambient temperature and humidity |
| CN110873504A (en) * | 2018-08-31 | 2020-03-10 | 沈阳海尔电冰箱有限公司 | Refrigerator defrost control method and refrigerator |
| CN113108539A (en) * | 2021-04-19 | 2021-07-13 | 长虹美菱股份有限公司 | Defrosting condition detection and control method for air-cooled refrigerator |
-
2022
- 2022-03-11 CN CN202210235671.0A patent/CN114608258A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030147A1 (en) * | 1999-02-19 | 2000-08-23 | Ranco Incorporated of Delaware | Controller and method for controlling the temperature in a refrigerator |
| DE202005012456U1 (en) * | 2005-07-08 | 2006-11-16 | Liebherr-Hausgeräte Ochsenhausen GmbH | Fridge and / or freezer |
| CN102954666A (en) * | 2012-11-21 | 2013-03-06 | 广东奥马电器股份有限公司 | Defrosting control method for refrigerator |
| CN104236004A (en) * | 2013-06-19 | 2014-12-24 | 广东美的制冷设备有限公司 | Defrosting control method and device for heat pump system |
| CN107940873A (en) * | 2017-11-17 | 2018-04-20 | 合肥美的电冰箱有限公司 | Defrosting method, defrosting system, computer-readable recording medium and refrigeration plant |
| CN108036556A (en) * | 2017-12-22 | 2018-05-15 | 珠海恩盛能源科技有限公司 | One kind defrosting and the relevant heat pump control mode of ambient temperature and humidity |
| CN110873504A (en) * | 2018-08-31 | 2020-03-10 | 沈阳海尔电冰箱有限公司 | Refrigerator defrost control method and refrigerator |
| CN113108539A (en) * | 2021-04-19 | 2021-07-13 | 长虹美菱股份有限公司 | Defrosting condition detection and control method for air-cooled refrigerator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115717806A (en) * | 2022-11-23 | 2023-02-28 | 江苏省精创电气股份有限公司 | Intelligent defrosting method, device, storage medium and electronic terminal for cold storage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP4365378B2 (en) | Defrosting operation control device and defrosting operation control method | |
| CN102679685B (en) | Air-cooled refrigerator and energy-saving defrosting control method thereof | |
| CN100483049C (en) | Refrigerating storage cabinet | |
| CN112283993B (en) | Refrigeration control method and device and refrigeration equipment | |
| CN110513949B (en) | Defrosting control method and device | |
| CN114777378B (en) | Refrigerator and control method thereof | |
| CN101644511A (en) | Parallel flow evaporator and anti-freezing method thereof | |
| CN115095954A (en) | Air conditioner and defrosting control method thereof | |
| CN113959063A (en) | Air conditioner control method, control device and air conditioner | |
| CN114608258A (en) | Defrosting control method of refrigerator refrigerating system based on electronic expansion valve | |
| CN114857749B (en) | Air conditioner and method for controlling defrosting of air conditioner | |
| CN115183400B (en) | Air conditioner and defrosting control method thereof | |
| CN113865259B (en) | Defrosting control method and device, air cooler and refrigeration house | |
| CN202613892U (en) | Air-cooled refrigerator | |
| CN115031351A (en) | Air conditioner and defrosting control method thereof | |
| CN115031352B (en) | Air conditioner and defrosting control method thereof | |
| CN115014040B (en) | Refrigerator control method and refrigerator | |
| CN113587539B (en) | Defrosting control method and refrigerator | |
| CN115031353A (en) | Air conditioner and defrosting control method thereof | |
| CN112344623B (en) | Defrosting control method and device for refrigerator evaporator and refrigerator | |
| CN113758072A (en) | Refrigeration energy-saving control method and refrigeration energy-saving control system based on intelligent defrosting | |
| CN115218346A (en) | Heat storage defrosting control method and air conditioning unit | |
| CN111578603A (en) | Defrosting control method | |
| CN115183401A (en) | Air conditioner and defrosting control method thereof | |
| CN115325754B (en) | Defrosting control method and system for refrigeration house |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220610 |