CN113124623A - Defrosting control method and device for refrigeration equipment and condensing unit - Google Patents
Defrosting control method and device for refrigeration equipment and condensing unit Download PDFInfo
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- CN113124623A CN113124623A CN202110454076.1A CN202110454076A CN113124623A CN 113124623 A CN113124623 A CN 113124623A CN 202110454076 A CN202110454076 A CN 202110454076A CN 113124623 A CN113124623 A CN 113124623A
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- 238000010257 thawing Methods 0.000 title claims abstract description 547
- 238000005057 refrigeration Methods 0.000 title claims abstract description 291
- 238000000034 method Methods 0.000 title claims abstract description 70
- 238000003860 storage Methods 0.000 claims description 22
- 238000001816 cooling Methods 0.000 claims description 8
- 238000001514 detection method Methods 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 14
- 230000007613 environmental effect Effects 0.000 description 11
- 238000010586 diagram Methods 0.000 description 4
- 230000033228 biological regulation Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004378 air conditioning Methods 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 238000009920 food preservation Methods 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/06—Removing frost
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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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
- 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
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- Combustion & Propulsion (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting control method and device for refrigeration equipment and a condensing unit, wherein the method comprises the following steps: when the refrigeration equipment meets the defrosting exit condition, controlling the refrigeration equipment to exit defrosting; determining the defrosting completion condition according to the defrosting exit condition; correcting defrosting entry conditions according to defrosting completion conditions; and the corrected defrosting entry condition is used for judging whether the refrigeration equipment enters defrosting or not. The invention solves the problems of incomplete defrosting or overlong defrosting time caused by simple defrosting control scheme in the prior art, corrects defrosting entry conditions according to defrosting completion conditions, and improves the intellectuality and defrosting effect of defrosting control.
Description
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a defrosting control method and device for the refrigeration equipment and a condensing unit.
Background
With the great support of the country on the aspect of freezing and refrigerating, the application of freezing and refrigerating is increasingly diversified, wherein the condensing unit is widely applied to various cold storages and plays roles of storing, storing and precooling in a cold chain. The application working condition of the condensing unit is generally lower than that of an air conditioner, the running time is long, the problem of frosting is relatively serious, the existing defrosting mode usually enters and exits at fixed time or only exits from defrosting after reaching a certain temperature, and the operation means is simple. If the defrosting time is inaccurate, the defrosting is early to quit, the problem of incomplete defrosting exists, and even the evaporator is frosted more and more seriously after a plurality of frosting cycles. If the defrosting time is set too long, electric energy is wasted, the temperature of the refrigeration house is easy to rise, and the food preservation in the refrigeration house is influenced.
Aiming at the problems of incomplete defrosting or overlong defrosting time caused by simple defrosting control schemes in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides a defrosting control method and device for refrigeration equipment and a condensing unit, and at least solves the problems of incomplete defrosting or overlong defrosting time caused by a simple defrosting control scheme in the prior art.
To solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided a defrosting control method for a refrigeration apparatus, including: when the refrigeration equipment meets the defrosting exit condition, controlling the refrigeration equipment to exit defrosting; determining the defrosting completion condition according to the defrosting exit condition; correcting defrosting entry conditions according to defrosting completion conditions; and the corrected defrosting entry condition is used for judging whether the refrigeration equipment enters defrosting or not.
Further, the defrosting entry conditions are as follows: the refrigeration attenuation coefficient is continuously smaller than the preset refrigeration attenuation coefficient within the first preset time.
Further, when the refrigeration equipment meets the defrosting exit condition, before controlling the refrigeration equipment to exit defrosting, the method further comprises the following steps: detecting the current refrigerating capacity of the refrigerating equipment; calculating a refrigeration attenuation coefficient according to the current refrigeration capacity; judging whether the refrigeration equipment meets defrosting entry conditions or not according to the refrigeration attenuation coefficient; when the defrosting entry condition is met, controlling the refrigeration equipment to keep operating in a refrigeration mode for a preset time; and judging whether the refrigeration equipment meets the defrosting operation condition, and controlling the refrigeration equipment to enter defrosting if the refrigeration equipment meets the defrosting operation condition.
Further, calculating a refrigeration attenuation coefficient according to the current refrigeration capacity comprises the following steps: and calculating the ratio of the current refrigerating capacity to the refrigerating capacity of the refrigerating equipment in the frostless operation, and determining the ratio as a refrigerating attenuation coefficient. Judging whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient, judging whether the refrigeration equipment meets the defrosting operation condition or not according to the refrigeration attenuation coefficient, and judging whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient
Further, judging whether the refrigeration equipment meets defrosting operation conditions or not comprises the following steps: detecting the refrigerating operation time and the indoor environment temperature of the refrigerating equipment; and judging whether the refrigeration equipment meets defrosting operation conditions or not according to the refrigeration operation time and/or the environment temperature.
Further, whether the refrigeration equipment meets the defrosting operation condition or not is judged according to the refrigeration operation time and/or the environment temperature, and the method comprises the following steps: when the refrigerating operation time is longer than a second preset time, or the environmental temperature is higher than defrosting entering temperature, or the refrigerating operation time is longer than a third preset time and the environmental temperature is not reduced within the third preset time, determining that the refrigerating equipment meets defrosting operation conditions; and the second preset time is greater than the third preset time.
Further, before judging whether the refrigeration equipment meets the defrosting entry condition according to the refrigeration attenuation coefficient, the method further comprises the following steps: detecting the indoor environment temperature of the refrigeration equipment; judging whether the attenuation coefficient is smaller than a first preset coefficient or not and whether the environmental temperature is larger than a first temperature threshold or not; if yes, controlling the refrigeration equipment to enter defrosting; otherwise, triggering to judge whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient.
Further, whether the refrigeration equipment meets the defrosting exit condition or not is detected, and the method comprises the following steps: detecting the defrosting temperature of the refrigeration equipment and the indoor environment temperature of the refrigeration equipment; judging whether the refrigeration equipment meets a defrosting exit condition or not according to the defrosting temperature and the environment temperature; wherein the defrosting exit condition at least comprises one of the following conditions: the defrosting temperature is greater than or equal to a defrosting exit temperature, the defrosting temperature is greater than or equal to a first preset temperature, the environment temperature is greater than or equal to a second preset temperature, the defrosting temperature is less than the first preset temperature, and the environment temperature is greater than or equal to a third preset temperature; the first preset temperature is higher than the defrosting exit temperature, and the second preset temperature is lower than the third preset temperature.
Further, determining the defrosting completion condition according to the defrosting exit condition, including: when the defrosting exit condition is that the defrosting temperature is greater than or equal to the defrosting exit temperature, determining that the defrosting completion condition is complete; when the defrosting exit condition is that the defrosting temperature is greater than or equal to a first preset temperature and the environment temperature is greater than or equal to a second preset temperature, determining that the defrosting completion condition is mostly completed; and when the defrosting exit condition is that the defrosting temperature is lower than the first preset temperature and the environmental temperature is higher than or equal to the third preset temperature, determining that the defrosting completion condition is partially completed.
Further, the defrosting completion condition comprises the following steps: complete, mostly complete and less complete; when the defrosting completion condition is completely completed or mostly completed, the defrosting entry condition is corrected according to the defrosting completion condition, and the method comprises the following steps: detecting the refrigerating capacity of the refrigerating equipment after the defrosting is stopped; calculating the attenuation coefficient of the refrigerating capacity after defrosting is exited, and correcting the preset refrigerating attenuation coefficient according to the attenuation coefficient of the refrigerating capacity after defrosting is exited; when the defrosting completion condition is the completion of a small part, correcting the defrosting entry condition according to the defrosting completion condition, wherein the method comprises the following steps: and correcting the preset refrigeration attenuation coefficient according to a preset rule.
Further, the step of correcting the preset refrigeration attenuation coefficient according to the attenuation coefficient of the refrigerating capacity after the defrosting is finished comprises the following steps: when the attenuation coefficient of the refrigerating capacity after defrosting is quitted is larger than the second preset coefficient and smaller than or equal to the third preset coefficient, increasing the preset refrigerating attenuation coefficient by a first preset value; when the attenuation coefficient of the refrigerating capacity after defrosting is quitted is smaller than a second preset coefficient, increasing the preset refrigerating attenuation coefficient by a second preset value; the second preset coefficient is smaller than the third preset coefficient, and the first preset value is smaller than the second preset value; correcting the preset refrigeration attenuation coefficient according to a preset rule, comprising the following steps: and increasing the preset refrigeration attenuation coefficient by a second preset value.
Further, after the preset refrigeration attenuation coefficient is increased by a second preset value, the method further comprises the following steps: operating an auxiliary defrosting mode; the auxiliary defrosting mode is exited after the refrigeration equipment meets the defrosting exiting condition; and in the next operation period, judging whether defrosting is started or not according to the corrected defrosting starting condition.
Further, operating an assisted defrost mode comprising: controlling the refrigeration equipment to enter defrosting after the running time of the refrigeration equipment reaches a fourth preset time; or, recalculating the refrigeration attenuation coefficient according to the current refrigerating capacity of the refrigeration equipment, and controlling the refrigeration equipment to enter defrosting when the refrigeration attenuation coefficient is smaller than the preset refrigeration attenuation coefficient; or after the refrigeration equipment runs for the fifth preset time, controlling the refrigeration equipment to enter defrosting.
Further, after the defrosting entry condition is adjusted according to the defrosting completion condition, the method further comprises the following steps: and under the condition that the defrosting entry condition is not corrected in the continuous first preset number of operation cycles, reducing the preset refrigeration attenuation coefficient in the defrosting entry condition by a third preset value.
Further, after the defrosting entry condition is adjusted according to the defrosting completion condition, the method further comprises the following steps: if the defrosting exit conditions met by the refrigeration equipment in the second preset number of continuous operation cycles are as follows: correcting the defrosting exit condition if the defrosting temperature is greater than or equal to a first preset temperature and the environment temperature is greater than or equal to a second preset temperature; and if the refrigeration attenuation coefficient of the refrigeration equipment is smaller than the fourth preset coefficient in the continuous third preset number of operation cycles, resetting the defrosting exit condition to the condition before correction.
Further, correcting the defrosting exit condition comprises: and modifying the defrosting exit temperature in the defrosting exit condition into the difference value between the defrosting temperature and the preset temperature threshold value.
According to another aspect of the embodiments of the present invention, there is provided a defrosting control apparatus for a refrigeration apparatus, including: the detection module is used for controlling the refrigeration equipment to quit defrosting when the refrigeration equipment meets defrosting quit conditions; the determining mode is used for determining defrosting completion conditions according to defrosting exit conditions; the adjusting module is used for correcting defrosting entry conditions according to defrosting completion conditions; and the corrected defrosting entry condition is used for judging whether the refrigeration equipment enters defrosting or not.
According to a further aspect of the embodiment of the invention, a condensing unit is provided, which comprises the refrigeration equipment control device.
According to yet another aspect of an embodiment of the present invention, there is provided a storage medium containing computer executable instructions for performing the refrigeration appliance defrosting control method as described above when executed by a computer processor.
According to the defrosting control scheme of the refrigeration equipment, after the refrigeration equipment meets a defrosting exit condition and exits defrosting, a defrosting completion condition is determined according to the defrosting exit condition, and then a defrosting entry condition is corrected according to the defrosting completion condition, namely, a defrosting control mode is adjusted in real time to improve a defrosting effect, so that the problems of incomplete defrosting or overlong defrosting time caused by a simple defrosting control scheme in the prior art are solved, and the intelligence and the defrosting effect of defrosting control are improved.
Drawings
FIG. 1 is an alternative flow chart of a defrosting control method for a refrigeration equipment according to an embodiment of the invention;
FIG. 2 is an alternative flow diagram of a defrosting entry control method according to an embodiment of the invention;
FIG. 3 is an alternative flow chart of a defrost exit control method according to an embodiment of the present invention;
FIG. 4 is an alternative flow diagram of a defrosting entry condition correction method according to an embodiment of the invention; and
fig. 5 is an alternative structure block diagram of the defrosting control device of the refrigeration equipment according to the embodiment of the invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In the preferred embodiment 1 of the present invention, a defrosting control method for a refrigeration apparatus is provided, which can be directly applied to various air conditioning units, especially a condensing unit, the condensing unit is widely applied to various refrigeration houses, the application working condition is lower than that of a common air conditioner, the operation time is long, and the problem of frosting is relatively serious. In particular, fig. 1 shows an alternative flow chart of the method, which, as shown in fig. 1, comprises the following steps S102-S106:
s102: when the refrigeration equipment meets the defrosting exit condition, controlling the refrigeration equipment to exit defrosting;
s104: determining the defrosting completion condition according to the defrosting exit condition;
s106: and correcting the defrosting entry condition according to the defrosting completion condition, wherein the corrected defrosting entry condition is used for judging whether the refrigeration equipment enters defrosting or not, namely, in the next operation period, the time for the refrigeration equipment to enter defrosting is determined according to the corrected defrosting entry condition.
In the above embodiment, a defrosting control scheme for a refrigeration apparatus is provided, where after the refrigeration apparatus meets a defrosting exit condition and exits defrosting, a defrosting completion condition is determined according to the defrosting exit condition, and then a defrosting entry condition is corrected according to the defrosting completion condition, that is, a defrosting control mode is adjusted in real time to improve a defrosting effect, so that the problems of incomplete defrosting or long defrosting time caused by a simple defrosting control scheme in the prior art are solved, and the intelligence and defrosting effect of defrosting control are improved.
When the refrigeration plant satisfies the condition of withdrawing from defrosting, before control refrigeration plant withdraws from defrosting, still include: detecting the current refrigerating capacity of the refrigerating equipment; calculating a refrigeration attenuation coefficient according to the current refrigeration capacity; judging whether the refrigeration equipment meets defrosting entry conditions or not according to the refrigeration attenuation coefficient; when the defrosting entry condition is met, controlling the refrigeration equipment to keep operating in a refrigeration mode for a preset time; and judging whether the refrigeration equipment meets the defrosting operation condition, and controlling the refrigeration equipment to enter defrosting if the refrigeration equipment meets the defrosting operation condition. When the defrosting condition is met, defrosting is not immediately carried out, but refrigeration operation is carried out firstly, a rapid refrigeration mode can be selected for the refrigeration operation, and a compressor and a fan operate at high frequency, so that the indoor environment temperature is rapidly reduced, and the indoor temperature is prevented from being increased too fast in the defrosting process. After the refrigeration operation, the time for entering into defrosting needs to be determined, namely whether the refrigeration equipment meets defrosting operation conditions or not is judged, and if yes, the refrigeration equipment is controlled to enter into defrosting.
In the process, calculating the refrigeration attenuation coefficient according to the current refrigeration capacity comprises the following steps: and calculating the ratio of the current refrigerating capacity to the refrigerating capacity of the refrigerating equipment in the frostless operation, and determining the ratio as a refrigerating attenuation coefficient. In the specific implementation, a temperature sensor, a pressure sensor and a flowmeter are arranged at the inlet and the outlet of the evaporator, and the refrigerating capacity of the evaporator is calculated by using the measured temperature, pressure and flow. During the frostless refrigerating operation of the unit, the indoor and outdoor temperature is measured, the current working condition parameters are recorded, the outlet pressure and temperature of the evaporator and the inlet pressure and temperature of the evaporator are measured, the pressure is converted into an enthalpy value, meanwhile, the flow of the refrigerant is measured, the refrigerating capacity obtained under the current working condition is calculated and recorded, and the refrigerating capacity is set as the refrigerating capacity of the refrigerating equipment under the frostless operation. And then, determining the current refrigerating capacity, and calculating the refrigerating attenuation coefficient according to the current refrigerating capacity and the refrigerating capacity of the refrigerating equipment during the frostless operation.
The specific judgment process of the defrosting operation condition of the refrigeration equipment, namely determining the time for entering defrosting, comprises the following steps: detecting the refrigerating operation time and the indoor environment temperature of the refrigerating equipment; and judging whether the refrigeration equipment meets defrosting operation conditions or not according to the refrigeration operation time and/or the environment temperature. When the refrigerating operation time is longer than a second preset time, or the environmental temperature is higher than defrosting entering temperature, or the refrigerating operation time is longer than a third preset time and the environmental temperature is not reduced within the third preset time, determining that the refrigerating equipment meets defrosting operation conditions; and the second preset time is greater than the third preset time. For example, when the current cooling capacity is continuously less than the evaporator frostless standard cooling capacity, which corresponds to the cooling capacity of the refrigeration equipment during frostless operation, and the refrigeration attenuation ratio corresponds to the current cooling capacity, the condensing unit enters the refrigeration operation (compressor, fan high-frequency operation). The condensing unit is a condensing unit and is arranged in the refrigeration house, so the ambient temperature is the temperature of the refrigeration house, and when the temperature of the refrigeration house reaches the defrosting entrance temperature (the set temperature is minus 3 ℃) or runs for 5min, the condensing unit enters the defrosting state. If the unit operates for 3min and the temperature of the warehouse does not drop, the unit also enters defrosting.
Before judging whether the refrigeration equipment meets the defrosting entry condition according to the refrigeration attenuation coefficient, the method further comprises the following steps: detecting the indoor environment temperature of the refrigeration equipment; judging whether the attenuation coefficient is smaller than a first preset coefficient or not and whether the environmental temperature is larger than a first temperature threshold or not; if yes, controlling the refrigeration equipment to enter defrosting; otherwise, triggering to judge whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient. For example, the current refrigerating capacity/evaporator frostless standard refrigerating capacity is less than 0.5, and the continuous 3min storage temperature is more than or equal to the storage temperature set value +2 ℃, which indicates that the frosting is serious, the refrigerating capacity of the refrigerating equipment is seriously insufficient, and the storage temperature is increased, so that the condensing unit is controlled to enter the defrosting mode.
Another defrosting entry control method is also provided in preferred embodiment 1 of the present invention, specifically, fig. 2 shows an optional flowchart of the method, and as shown in fig. 2, the method includes the following steps S201 to S211:
s201: starting refrigeration;
s202: refrigerating operation;
s203: it is determined whether the refrigeration decay is < 50% (i.e., the first predetermined factor in the above embodiment) or not. If yes, the process goes to S204, otherwise, the process goes to S205;
s204: continuously for 3min, the reservoir temperature is more than or equal to the reservoir temperature set value +2 ℃ (namely the first temperature threshold value in the embodiment); the frosting is serious, the refrigerating capacity of the condensing unit is seriously insufficient, and the storage temperature is increased, so that the condensing unit is controlled to defrost;
s205: the current refrigerating capacity is less than the evaporator frostless standard refrigerating capacity and the refrigerating attenuation ratio continuously for 3 minutes;
s206: at this time, in order to avoid that the ambient temperature (the storage temperature) drops too fast during defrosting, the preset duration of the refrigeration mode needs to be maintained, for example, forced refrigeration (namely, high-frequency operation of a compressor of a condensing unit) can be selected, and the current storage temperature Ts is recorded;
s207: judging whether the temperature Ts of the warehouse is less than or equal to the standard value, namely judging whether the real-time warehouse temperature is reduced; if yes, go to S209, otherwise, go to S208;
s208: the running time is not less than 3min (i.e. the third preset time in the above embodiment), and then the process proceeds to S211; if the unit operates for 3min and the temperature of the warehouse does not drop, the unit also enters defrosting;
s209: judging whether the defrosting entering temperature is less than or equal to the reservoir temperature, if so, entering S211, otherwise, entering S210; when the storage temperature reaches the defrosting entering temperature (for example, the set temperature is minus 3 ℃), the unit enters defrosting;
s210: judging whether the running time is greater than or equal to 5min (namely the second preset time in the embodiment) or not, and if so, entering S211; when the unit operates for 5min, the unit enters defrosting;
s211: and (4) defrosting.
The defrosting control method can ensure that the condensing unit can timely enter the defrosting mode, avoid long-time running of the condensing unit under the frosting condition, waste energy, easily cause temperature rise in the refrigeration house and influence the use of the refrigeration house.
A plurality of defrosting exit conditions are also set in the invention, so that defrosting exit is more intelligent. Specifically, whether the refrigeration equipment meets the defrosting exit condition or not is detected, and the method comprises the following steps: detecting the defrosting temperature of the refrigeration equipment and the indoor environment temperature of the refrigeration equipment; judging whether the refrigeration equipment meets a defrosting exit condition or not according to the defrosting temperature and the environment temperature; wherein the defrosting exit condition at least comprises one of the following conditions: the defrosting temperature is greater than or equal to a defrosting exit temperature, the defrosting temperature is greater than or equal to a first preset temperature, the environment temperature is greater than or equal to a second preset temperature, the defrosting temperature is less than the first preset temperature, and the environment temperature is greater than or equal to a third preset temperature; the first preset temperature is higher than the defrosting exit temperature, and the second preset temperature is lower than the third preset temperature; specifically, the second preset temperature is equal to the sum of the set temperature and a second difference, the third preset temperature is equal to the sum of the set temperature and a third difference, and the third difference is greater than the second difference.
When the defrosting exit condition is that the defrosting temperature is greater than or equal to the defrosting exit temperature, determining that the defrosting completion condition is complete; when the defrosting exit condition is that the defrosting temperature is greater than or equal to a first preset temperature and the environment temperature is greater than or equal to a second preset temperature, determining that the defrosting completion condition is mostly completed; and when the defrosting exit condition is that the defrosting temperature is lower than the first preset temperature and the environmental temperature is higher than or equal to the third preset temperature, determining that the defrosting completion condition is partially completed.
After the defrosting completion condition is determined, the defrosting entering condition is corrected according to the defrosting completion condition so as to adjust the next defrosting time and improve the defrosting process. And for the defrosting completion condition, the defrosting entrance condition is corrected according to the defrosting completion condition, wherein the defrosting completion condition is completely completed or mostly completed, and the method comprises the following steps: detecting the refrigerating capacity of the refrigerating equipment after the defrosting is stopped; calculating the attenuation coefficient of the refrigerating capacity after defrosting is exited, and correcting the preset refrigerating attenuation coefficient according to the attenuation coefficient of the refrigerating capacity after defrosting is exited; when the attenuation coefficient of the refrigerating capacity after defrosting is quitted is larger than a second preset coefficient and smaller than or equal to a third preset coefficient, increasing a first preset value by a preset refrigerating attenuation coefficient; when the attenuation coefficient of the refrigerating capacity after defrosting is quitted is smaller than a second preset coefficient, the preset refrigerating attenuation coefficient is increased by a second preset value; otherwise, the preset refrigeration attenuation coefficient is not corrected; the second preset coefficient is smaller than the third preset coefficient, and the first preset value is smaller than the second preset value; correcting the preset refrigeration attenuation coefficient according to a preset rule, comprising the following steps: the preset refrigeration attenuation coefficient is increased by a second preset value. The larger the attenuation coefficient of the refrigerating capacity after the defrosting is exited is, the more thorough the defrosting is indicated, namely, the better the defrosting effect is, the smaller the attenuation coefficient of the refrigerating capacity after the defrosting is exited is, the more incomplete the defrosting is indicated, therefore, the preset refrigeration attenuation coefficient can be correspondingly increased according to the attenuation coefficient of the refrigerating capacity after the defrosting is exited, so that the next defrosting entering is more consistent with the previous defrosting completion condition. When the previous defrosting is not complete, the preset refrigeration attenuation coefficient is increased, so that the next defrosting is started in advance, and the defrosting effect is improved.
After the preset refrigeration attenuation coefficient is increased by a second preset value, the method further comprises the following steps: operating an auxiliary defrosting mode; the auxiliary defrosting mode is exited after the refrigeration equipment meets the defrosting exiting condition; and in the next operation period, judging whether defrosting is started or not according to the corrected defrosting starting condition. The purpose of the operation auxiliary defrosting is to finish the frosting which is not finished before so as to realize the complete defrosting. Specifically, the auxiliary defrosting mode is operated, and comprises the following steps: controlling the refrigeration equipment to enter defrosting after the running time of the refrigeration equipment reaches a fourth preset time; or, recalculating the refrigeration attenuation coefficient according to the current refrigerating capacity of the refrigeration equipment, and controlling the refrigeration equipment to enter defrosting when the refrigeration attenuation coefficient is smaller than the preset refrigeration attenuation coefficient; or after the refrigeration equipment runs for the fifth preset time, controlling the refrigeration equipment to enter defrosting. When the defrosting is finished mostly, controlling the refrigeration equipment to enter defrosting after the running time of the refrigeration equipment reaches a fourth preset time; or, recalculating the refrigeration attenuation coefficient according to the current refrigerating capacity of the refrigeration equipment, and controlling the refrigeration equipment to enter defrosting when the refrigeration attenuation coefficient is smaller than the preset refrigeration attenuation coefficient. And when the defrosting is completed in a small part, controlling the refrigeration equipment to enter defrosting after the refrigeration equipment runs for a fifth preset time.
After the defrosting entry condition is adjusted according to the defrosting completion condition, further adjustment of the defrosting entry condition and the defrosting exit condition is performed, which specifically comprises the following steps: and under the condition that the defrosting entry condition is not corrected in the continuous first preset number of operation cycles, reducing the preset refrigeration attenuation coefficient in the defrosting entry condition by a third preset value. If the defrosting exit conditions met by the refrigeration equipment in the second preset number of continuous operation cycles are as follows: correcting the defrosting exit condition if the defrosting temperature is greater than or equal to a first preset temperature and the environment temperature is greater than or equal to a second preset temperature; and if the refrigeration attenuation coefficient of the refrigeration equipment is smaller than the fourth preset coefficient in the continuous third preset number of operation cycles, resetting the defrosting exit condition to the condition before correction. Wherein, revise the condition that withdraws from frosting, include: and modifying the defrosting exit temperature in the defrosting exit condition into the difference value between the defrosting temperature and the preset temperature threshold value.
When the defrosting is completed in a small part, the defrosting effect is poor, more frosting remains, but the temperature of the storage is raised at the moment, and refrigeration is required to be carried out immediately, so that after refrigeration or before refrigeration, the preset refrigeration attenuation coefficient is corrected according to the preset rule, for example, the preset refrigeration attenuation coefficient is increased by 10%, and the next defrosting is enabled to enter the threshold to be reduced.
In preferred embodiment 1 of the present invention, there is further provided a defrosting exit control method, and specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S301 to S315:
s301: defrosting is carried out;
s302: judging whether the defrosting temperature T1 is greater than or equal to the defrosting exit temperature Tt, if so, entering S303; when the defrosting temperature T1 measured by the defrosting thermal bulb is more than or equal to the defrosting exit temperature Tt, the defrosting is finished and the defrosting is directly exited;
s303: removing defrosting;
s304: judging whether the current refrigerating capacity/evaporator frostless standard refrigerating capacity is less than 0.95 (namely the third preset coefficient in the embodiment) or not, if so, entering S306, and if not, entering S305;
s305: no correction is made; after defrosting is quitted, calculating refrigerating capacity and comparing the refrigerating capacity with evaporator frostless standard refrigerating capacity, and if the current refrigerating capacity/evaporator frostless standard refrigerating capacity is 0.95-1, determining that the parameters are proper and not correcting;
s306: judging whether the current refrigerating capacity/evaporator frostless standard refrigerating capacity is less than 0.8 (namely the second preset coefficient in the embodiment) or not, if so, entering S308, and if not, entering S307;
s307: refrigeration attenuation ratio + 5% (first preset value); if the current refrigerating capacity/evaporator frostless standard refrigerating capacity is 0.8-0.95, the refrigerating attenuation ratio is + 5%;
s308: the refrigeration attenuation ratio is + 10%, and the refrigeration operation T/2 or the current refrigerating capacity is less than the evaporator frostless standard refrigerating capacity and the refrigeration attenuation ratio enters defrosting; t is the running period; if the current refrigerating capacity/the standard refrigerating capacity of frostless evaporator is less than 0.8, the defrosting is not thorough enough, the refrigerating attenuation ratio is + 10%, and the refrigerating operation is T/2 (the defrosting is rapidly carried out) or the current refrigerating capacity is less than the standard refrigerating capacity of frostless evaporator and the refrigerating attenuation ratio is carried out, and a defrosting mode is carried out; here, 10% is a second preset value, T/2 is a fourth preset time, and the refrigeration attenuation ratio is a preset refrigeration attenuation coefficient;
s309: judging whether the defrosting temperature T1 is more than or equal to 2 ℃ (the first preset temperature) and the storage temperature is more than or equal to the storage temperature set temperature plus 3 ℃ (the second preset temperature) or not, if yes, entering S10, and if not, entering S312; when the defrosting temperature T1 measured by the defrosting temperature sensing bulb is more than or equal to 2 ℃, and the storage temperature is more than or equal to the storage temperature set temperature plus 3 ℃, recording the measured temperature T1 of the defrosting temperature sensing bulb, and stopping defrosting of the unit; at the moment, the defrosting completion condition is judged to be that a part of frost still remains, the operation is not influenced, and defrosting is quitted according to the storage temperature;
s310: removing defrosting;
s311: it is determined whether the current cooling capacity/evaporator frost-free standard cooling capacity is less than 0.98, at this time, 0.98 corresponds to the third predetermined coefficient in the above embodiment, and the coefficient may also take the value of 0.95. If yes, the process proceeds to S306, and if not, the process proceeds to S305; if the current refrigerating capacity/evaporator frostless standard refrigerating capacity is 0.98-1, the parameters are appropriate, and no correction is carried out; if the current refrigerating capacity/the frostless standard refrigerating capacity of the evaporator is 0.8-0.99, refrigerating attenuation ratio is + 5%, if the current refrigerating capacity/the frostless standard refrigerating capacity of the evaporator is less than 0.8, refrigerating attenuation ratio is + 10%, and refrigerating operation is T/2 or the current refrigerating capacity is less than the frostless standard refrigerating capacity of the evaporator and refrigerating attenuation ratio, entering defrosting;
s312: judging whether the defrosting temperature T1 is less than 2 ℃ (the first preset temperature) and the storage temperature is more than or equal to the storage temperature set temperature plus 5 ℃ (the third preset temperature) or not, if yes, entering S313, and if not, entering S301; when the measured temperature T1 of the defrosting bulb is less than 2 ℃ and the reservoir temperature is more than or equal to the reservoir temperature set temperature plus 5 ℃, the defrosting completion condition is judged to be that defrosting is not completely finished but the reservoir temperature is too high and defrosting needs to be quitted;
s313: refrigeration attenuation ratio + 10% (second preset value);
s314: removing defrosting;
s315: and (5) operating the unit for 10min (fifth preset time), and forcibly defrosting the unit. And (4) after the unit operates for 10min, entering a defrosting mode to defrost as soon as possible.
In preferred embodiment 1 of the present invention, there is further provided a defrosting entry condition correcting method, and specifically, fig. 4 shows an alternative flowchart of the method, and as shown in fig. 4, the method includes the following steps S401 to S408:
s401: the frost inlet conditions were not adjusted for 3 consecutive (first preset number in the above example) operating cycles;
s402: refrigeration attenuation ratio-5%;
s403: whether the defrosting exit condition is' the defrosting temperature T1 is more than or equal to 2 ℃ and the storage temperature is more than or equal to the storage temperature set temperature +3 ℃ or not in 3 continuous (the second preset number in the embodiment) running periods;
s404: not correcting; namely, the condition that most of defrosting is finished is not corrected;
s405: tt-1-1 ℃, namely the defrosting exit temperature Tt is modified to be the difference value between the defrosting temperature and the preset temperature threshold, wherein 1 ℃ is the preset temperature threshold;
s406: in 3 operating cycles, the current refrigerating capacity/evaporator frostless standard refrigerating capacity is more than or equal to 0.95 (fourth preset coefficient in the above embodiment) at the end of defrosting;
s407: tt is reset to before change;
s408: and exiting the correction.
After the defrosting entry condition is adjusted, further correction is carried out according to the adjustment result, so that the defrosting entry condition and the defrosting exit condition are more in line with the actual defrosting condition.
In the above embodiment, when the unit operates without frost, the current cooling capacity is recorded. When frosting, because heat transfer capacity descends, lead to freezer temperature decline speed slow, can't descend even, the evaporimeter heat transfer volume can be reduced for when frostless operation. When the unit frosts to a certain degree, the heat exchange quantity is attenuated to a certain proportion, and the unit is defrosted. When the unit reaches the defrosting exit temperature condition, the unit refrigerates again, the proportion of the refrigerating capacity without the defrosting refrigerating capacity is measured again, whether the unit defrosting entry condition is proper or not is judged, the refrigerating capacity attenuation ratio is automatically adjusted, the unit entering defrosting condition is ensured to be proper, frosting is avoided being too serious, defrosting is carried out in time, the refrigerating efficiency is improved, and meanwhile, the storage temperature is not beyond the range and the defrosting is ensured to be clean.
Example 2
Based on the defrosting control method for the refrigeration equipment provided in the above embodiment 1, in a preferred embodiment 2 of the present invention, there is further provided a defrosting control device for the refrigeration equipment, and specifically, fig. 5 shows an alternative structural block diagram of the device, and as shown in fig. 5, the device includes:
the detection module 502 is used for controlling the refrigeration equipment to quit defrosting when the refrigeration equipment meets the defrosting quit condition;
a determining mode 504, configured to determine a defrosting completion condition according to a defrosting exit condition;
and an adjusting module 506, configured to correct the defrosting entry condition according to the defrosting completion condition.
In the above embodiment, a defrosting control scheme for a refrigeration apparatus is provided, where after the refrigeration apparatus meets a defrosting exit condition and exits defrosting, a defrosting completion condition is determined according to the defrosting exit condition, and then a defrosting entry condition is corrected according to the defrosting completion condition, that is, a defrosting control mode is adjusted in real time to improve a defrosting effect, so that the problems of incomplete defrosting or long defrosting time caused by a simple defrosting control scheme in the prior art are solved, and the intelligence and defrosting effect of defrosting control are improved.
Wherein, the defrosting entry condition is as follows: the refrigeration attenuation coefficient is continuously smaller than the preset refrigeration attenuation coefficient within the first preset time. This device still includes: the refrigerating capacity detection module is used for detecting the current refrigerating capacity of the refrigerating equipment before the refrigerating equipment is controlled to quit defrosting when the refrigerating equipment meets defrosting quit conditions; the calculation module is used for calculating the refrigeration attenuation coefficient according to the current refrigeration capacity; the judging module is used for judging whether the refrigeration equipment meets defrosting entry conditions or not according to the refrigeration attenuation coefficient; the refrigeration module is used for controlling the refrigeration equipment to keep a refrigeration mode to operate for preset time when the defrosting entry condition is met; and the defrosting entering module is used for judging whether the refrigeration equipment meets defrosting operation conditions or not, and controlling the refrigeration equipment to enter defrosting if the defrosting operation conditions are met.
The calculation module comprises: and calculating the ratio of the current refrigerating capacity to the refrigerating capacity of the refrigerating equipment in the frostless operation, and determining the ratio as a refrigerating attenuation coefficient. The defrosting entry module includes: the detection submodule is used for detecting the refrigerating operation time and the indoor environment temperature of the refrigerating equipment; and the defrosting sub-module is used for judging whether the refrigeration equipment meets defrosting operation conditions or not according to the refrigeration operation time and/or the environment temperature.
The defrosting submodule comprises: when the refrigerating operation time is longer than a second preset time, or the environmental temperature is higher than defrosting entering temperature, or the refrigerating operation time is longer than a third preset time and the environmental temperature is not reduced within the third preset time, determining that the refrigerating equipment meets defrosting operation conditions; and the second preset time is greater than the third preset time.
This device still includes: the temperature detection module is used for detecting the indoor environment temperature of the refrigeration equipment before judging whether the refrigeration equipment meets the defrosting entry condition according to the refrigeration attenuation coefficient; the condition judgment module is used for judging whether the attenuation coefficient is smaller than a first preset coefficient or not and whether the environment temperature is larger than a first temperature threshold or not; if yes, controlling the refrigeration equipment to enter defrosting; and the triggering module is used for triggering whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient when the condition is not met.
The detection module 502 includes: the temperature detection submodule is used for detecting the defrosting temperature of the refrigeration equipment and the indoor environment temperature of the refrigeration equipment; the defrosting exit sub-module is used for judging whether the refrigeration equipment meets a defrosting exit condition or not according to the defrosting temperature and the environment temperature; wherein the defrosting exit condition at least comprises one of the following conditions: the defrosting temperature is greater than or equal to a defrosting exit temperature, the defrosting temperature is greater than or equal to a first preset temperature, the environment temperature is greater than or equal to a second preset temperature, the defrosting temperature is less than the first preset temperature, and the environment temperature is greater than or equal to a third preset temperature; the second preset temperature is equal to the sum of the set temperature and a second difference, the third preset temperature is equal to the sum of the set temperature and a third difference, and the third difference is larger than the second difference.
Determining the pattern 504 includes: when the defrosting exit condition is that the defrosting temperature is greater than or equal to the defrosting exit temperature, determining that the defrosting completion condition is complete; when the defrosting exit condition is that the defrosting temperature is greater than or equal to a first preset temperature and the environment temperature is greater than or equal to a second preset temperature, determining that the defrosting completion condition is mostly completed; and when the defrosting exit condition is that the defrosting temperature is lower than the first preset temperature and the environmental temperature is higher than or equal to the third preset temperature, determining that the defrosting completion condition is partially completed.
Wherein, the defrosting completion condition comprises: complete, mostly complete and less complete; the adjustment module 506 includes: the first adjusting sub-module is used for detecting the refrigerating capacity of the refrigerating equipment after the refrigerating equipment exits defrosting when the defrosting completion condition is that all or most of defrosting is completed; calculating the attenuation coefficient of the refrigerating capacity after defrosting is exited, and correcting the preset refrigerating attenuation coefficient according to the attenuation coefficient of the refrigerating capacity after defrosting is exited; and the second adjusting submodule is used for correcting the preset refrigeration attenuation coefficient according to a preset rule when the defrosting completion condition is that a small part is completed.
Wherein the first regulation submodule comprises: the first adjusting unit is used for increasing a first preset value by a preset refrigeration attenuation coefficient when the attenuation coefficient of the refrigeration capacity after defrosting is withdrawn is larger than a second preset coefficient and smaller than or equal to a third preset coefficient; the second adjusting unit is used for increasing a second preset value by the preset refrigeration attenuation coefficient when the attenuation coefficient of the refrigeration capacity after the defrosting is quitted is smaller than a second preset coefficient; otherwise, the preset refrigeration attenuation coefficient is not corrected; the second preset coefficient is smaller than the third preset coefficient, and the first preset value is smaller than the second preset value; the second regulation submodule is specifically configured to: correcting the preset refrigeration attenuation coefficient according to a preset rule, comprising the following steps: the preset refrigeration attenuation coefficient is increased by a second preset value. The adjustment module 506 further includes: the auxiliary defrosting sub-module is used for operating an auxiliary defrosting mode after the preset refrigeration attenuation coefficient is increased by a second preset value; and the defrosting exit sub-module is used for exiting the auxiliary defrosting mode after the refrigeration equipment meets the defrosting exit condition, and judging whether to enter defrosting according to the corrected defrosting entry condition in the next operating period.
The auxiliary defrosting module comprises: the first defrosting unit is used for controlling the refrigeration equipment to enter defrosting after the running time of the refrigeration equipment reaches a fourth preset time; the second defrosting unit is used for recalculating the refrigeration attenuation coefficient according to the current refrigerating capacity of the refrigeration equipment and controlling the refrigeration equipment to enter defrosting when the refrigeration attenuation coefficient is smaller than the preset refrigeration attenuation coefficient; and the third defrosting unit is used for controlling the refrigeration equipment to enter defrosting after the refrigeration equipment runs for a fifth preset time.
The adjustment module 506 further includes: and the third adjusting submodule is used for reducing the preset refrigeration attenuation coefficient in the defrosting entry condition by a third preset value under the condition that the defrosting entry condition is not corrected in the continuous first preset number of running cycles after the defrosting entry condition is adjusted according to the defrosting completion condition. And the fourth adjusting submodule is used for adjusting the defrosting entry condition according to the defrosting completion condition, and if the defrosting exit conditions met by the refrigerating equipment are all within a second continuous preset number of operation cycles: correcting the defrosting exit condition if the defrosting temperature is greater than or equal to a first preset temperature and the environment temperature is greater than or equal to a second preset temperature; and if the refrigeration attenuation coefficient of the refrigeration equipment is smaller than the fourth preset coefficient in the continuous third preset number of operation cycles, resetting the defrosting exit condition to the condition before correction. Wherein, revise the condition that withdraws from frosting, include: and modifying the defrosting exit temperature in the defrosting exit condition into the difference value between the defrosting temperature and the preset temperature threshold value.
With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.
Example 3
Based on the refrigeration equipment control device provided in the above embodiment 2, in a preferred embodiment 3 of the present invention, there is also provided a condensation unit, including the refrigeration equipment control device as described above.
In the above embodiment, a defrosting control scheme for a refrigeration apparatus is provided, where after the refrigeration apparatus meets a defrosting exit condition and exits defrosting, a defrosting completion condition is determined according to the defrosting exit condition, and then a defrosting entry condition is corrected according to the defrosting completion condition, that is, a defrosting control mode is adjusted in real time to improve a defrosting effect, so that the problems of incomplete defrosting or long defrosting time caused by a simple defrosting control scheme in the prior art are solved, and the intelligence and defrosting effect of defrosting control are improved.
Example 4
Based on the refrigeration apparatus defrosting control method provided in the above embodiment 1, there is also provided in a preferred embodiment 4 of the present invention a storage medium containing computer executable instructions for executing the refrigeration apparatus defrosting control method as described above when executed by a computer processor.
In the above embodiment, a defrosting control scheme for a refrigeration apparatus is provided, where after the refrigeration apparatus meets a defrosting exit condition and exits defrosting, a defrosting completion condition is determined according to the defrosting exit condition, and then a defrosting entry condition is corrected according to the defrosting completion condition, that is, a defrosting control mode is adjusted in real time to improve a defrosting effect, so that the problems of incomplete defrosting or long defrosting time caused by a simple defrosting control scheme in the prior art are solved, and the intelligence and defrosting effect of defrosting control are improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (19)
1. A defrosting control method for refrigeration equipment is characterized by comprising the following steps:
when the refrigeration equipment meets the defrosting exit condition, controlling the refrigeration equipment to exit defrosting;
determining the defrosting completion condition according to the defrosting exit condition;
correcting defrosting entry conditions according to the defrosting completion condition; and the corrected defrosting entry condition is used for judging whether the refrigeration equipment enters defrosting or not.
2. The method according to claim 1, wherein the defrosting entry condition is: the refrigeration attenuation coefficient is continuously smaller than the preset refrigeration attenuation coefficient within the first preset time.
3. The method of claim 2, wherein before controlling the refrigeration equipment to exit defrosting when the refrigeration equipment meets a defrosting exit condition, the method further comprises:
detecting the current refrigerating capacity of the refrigerating equipment;
calculating the refrigeration attenuation coefficient according to the current refrigeration capacity;
judging whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient;
and when the defrosting entering condition is met, controlling the refrigeration equipment to keep running in a refrigeration mode for a preset time, then judging whether the refrigeration equipment meets the defrosting running condition, and if the defrosting running condition is met, controlling the refrigeration equipment to enter defrosting.
4. The method of claim 3, wherein calculating the refrigeration attenuation factor based on the current capacity comprises:
and calculating the ratio of the current refrigerating capacity to the refrigerating capacity of the refrigerating equipment during the frostless operation, and determining the ratio as the refrigerating attenuation coefficient.
5. The method of claim 3, wherein determining whether the refrigeration appliance meets defrosting operating conditions comprises:
detecting the refrigerating operation time and the indoor environment temperature of the refrigerating equipment;
and judging whether the refrigeration equipment meets defrosting operation conditions or not according to the refrigeration operation time and/or the environment temperature.
6. The method of claim 5, wherein determining whether the refrigeration equipment meets defrosting operation conditions based on the cooling operation time and/or the ambient temperature comprises:
when the refrigerating operation time is longer than second preset time, or the environment temperature is higher than defrosting entering temperature, or the refrigerating operation time is longer than third preset time and the environment temperature does not decrease within the third preset time, determining that the refrigerating equipment meets defrosting operation conditions; and the second preset time is greater than the third preset time.
7. The method of claim 3, further comprising, prior to determining whether the refrigeration equipment satisfies the defrost entry condition based on the refrigeration attenuation factor:
detecting the indoor environment temperature of the refrigeration equipment;
judging whether the refrigeration attenuation coefficient is smaller than a first preset coefficient or not, and whether the indoor environment temperature of the refrigeration equipment is larger than a first temperature threshold or not;
if yes, controlling the refrigeration equipment to enter defrosting;
otherwise, triggering to judge whether the refrigeration equipment meets the defrosting entry condition or not according to the refrigeration attenuation coefficient.
8. The method of claim 1, wherein detecting whether the refrigeration equipment meets a defrost exit condition comprises:
detecting the defrosting temperature of the refrigeration equipment and the indoor environment temperature of the refrigeration equipment;
judging whether the refrigeration equipment meets a defrosting exit condition or not according to the defrosting temperature and the environment temperature; wherein the defrosting exit condition comprises at least one of: the defrosting temperature is greater than or equal to a defrosting exit temperature, the defrosting temperature is greater than or equal to a first preset temperature, the environment temperature is greater than or equal to a second preset temperature, the defrosting temperature is less than the first preset temperature, and the environment temperature is greater than or equal to a third preset temperature; the first preset temperature is higher than the defrosting exit temperature, and the second preset temperature is lower than the third preset temperature.
9. The method of claim 8, wherein determining a defrost completion based on the defrost exit condition comprises:
when the defrosting exit condition is that the defrosting temperature is greater than or equal to the defrosting exit temperature, determining that the defrosting completion condition is complete;
when the defrosting exit condition is that the defrosting temperature is greater than or equal to the first preset temperature and the environment temperature is greater than or equal to the second preset temperature, determining that the defrosting completion condition is mostly completed;
and when the defrosting exit condition is that the defrosting temperature is lower than the first preset temperature and the environment temperature is higher than or equal to the third preset temperature, determining that the defrosting completion condition is partially completed.
10. The method of claim 2, wherein the defrosting complete condition comprises: complete, mostly complete and less complete;
when the defrosting completion condition is the complete completion or the majority completion, correcting a defrosting entry condition according to the defrosting completion condition, including:
detecting the refrigerating capacity of the refrigerating equipment after defrosting;
calculating the attenuation coefficient of the refrigerating capacity after the defrosting is exited, and correcting the preset refrigerating attenuation coefficient according to the attenuation coefficient of the refrigerating capacity after the defrosting is exited;
when the defrosting completion condition is that the small part is completed, correcting a defrosting entry condition according to the defrosting completion condition, wherein the defrosting entry condition comprises the following steps:
and correcting the preset refrigeration attenuation coefficient according to a preset rule.
11. The method of claim 10,
correcting the preset refrigeration attenuation coefficient according to the attenuation coefficient of the refrigeration capacity after the defrosting is stopped, wherein the method comprises the following steps:
when the attenuation coefficient of the refrigerating capacity after defrosting is quitted is larger than a second preset coefficient and smaller than or equal to a third preset coefficient, increasing a first preset value for the preset refrigerating attenuation coefficient;
when the attenuation coefficient of the refrigerating capacity after defrosting is withdrawn is smaller than the second preset coefficient, increasing the preset refrigerating attenuation coefficient by a second preset value; the second preset coefficient is smaller than the third preset coefficient, and the first preset value is smaller than the second preset value;
correcting the preset refrigeration attenuation coefficient according to a preset rule, comprising the following steps:
and increasing the preset refrigeration attenuation coefficient by the second preset value.
12. The method of claim 10, further comprising, after the increasing of the preset refrigeration attenuation coefficient by the second preset value:
operating an auxiliary defrosting mode;
exiting the auxiliary defrosting mode after the refrigeration equipment meets the defrosting exit condition;
and in the next operation period, judging whether defrosting is started or not according to the corrected defrosting starting condition.
13. The method of claim 12, wherein the operating the assisted defrost mode comprises:
controlling the refrigeration equipment to enter defrosting after the running time of the refrigeration equipment reaches a fourth preset time; or the like, or, alternatively,
recalculating the refrigeration attenuation coefficient according to the current refrigerating capacity of the refrigeration equipment, and controlling the refrigeration equipment to enter defrosting when the refrigeration attenuation coefficient is smaller than the preset refrigeration attenuation coefficient; or the like, or, alternatively,
and after the refrigeration equipment runs for a fifth preset time, controlling the refrigeration equipment to enter defrosting.
14. The method according to claim 2, after correcting the defrosting entry condition according to the defrosting completion condition, further comprising:
and under the condition that the defrosting entry condition is not corrected in a first preset number of continuous operation cycles, reducing the preset refrigeration attenuation coefficient in the defrosting entry condition by a third preset value.
15. The method according to claim 8, after correcting the defrosting entry condition according to the defrosting completion condition, further comprising:
if the defrosting exit conditions met by the refrigeration equipment in the second preset number of continuous operation cycles are as follows: if the defrosting temperature is greater than or equal to the first preset temperature and the environment temperature is greater than or equal to the second preset temperature, correcting the defrosting exit condition;
and if the refrigeration attenuation coefficient of the refrigeration equipment is smaller than a fourth preset coefficient in a continuous third preset number of operation cycles after the continuous second preset number of operation cycles, resetting the defrosting exit condition to the condition before correction.
16. The method of claim 15, wherein modifying the defrost exit condition comprises:
and modifying the defrosting exit temperature in the defrosting exit condition into the difference value between the defrosting temperature and a preset temperature threshold value.
17. A refrigeration apparatus defrosting control apparatus, comprising:
the detection module is used for controlling the refrigeration equipment to quit defrosting when the refrigeration equipment meets defrosting quit conditions;
a determining mode, which is used for determining the defrosting completion condition according to the defrosting exit condition;
the adjusting module is used for correcting defrosting entry conditions according to the defrosting completion condition; and the corrected defrosting entry condition is used for judging whether the refrigeration equipment enters defrosting or not.
18. A condensing unit comprising a refrigeration apparatus defrosting control means as claimed in claim 17.
19. A storage medium containing computer executable instructions for performing the refrigeration appliance defrosting control method of any one of claims 1 to 16 when executed by a computer processor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110454076.1A CN113124623B (en) | 2021-04-26 | 2021-04-26 | Defrosting control method and device for refrigeration equipment and condensing unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110454076.1A CN113124623B (en) | 2021-04-26 | 2021-04-26 | Defrosting control method and device for refrigeration equipment and condensing unit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113124623A true CN113124623A (en) | 2021-07-16 |
| CN113124623B CN113124623B (en) | 2022-05-10 |
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| CN115711511A (en) * | 2022-11-11 | 2023-02-24 | 珠海格力电器股份有限公司 | Thermal fluorination defrosting control method and device and refrigeration equipment |
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| CN113124623B (en) | 2022-05-10 |
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