CN111609665B - Defrosting control method and device - Google Patents
Defrosting control method and device Download PDFInfo
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- CN111609665B CN111609665B CN202010413962.5A CN202010413962A CN111609665B CN 111609665 B CN111609665 B CN 111609665B CN 202010413962 A CN202010413962 A CN 202010413962A CN 111609665 B CN111609665 B CN 111609665B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D21/00—Defrosting; Preventing frosting; Removing condensed or defrost water
- F25D21/002—Defroster control
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/02—Timing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2600/00—Control issues
- F25D2600/06—Controlling according to a predetermined profile
Abstract
The invention provides a defrosting control method and a defrosting control device, wherein the method comprises the following steps: under the condition that the unit is in a defrosting state, determining whether a defrosting exit condition is met; if the defrosting exit condition is met, controlling the unit to exit defrosting and enter a refrigerating state; acquiring a first real-time refrigerating capacity of the unit; and comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity to adjust a defrosting exit condition. By means of the technical scheme, the technical problem that the existing defrosting control accuracy is not high is solved, and the technical effects of effectively improving the defrosting control accuracy and improving the defrosting efficiency are achieved.
Description
Technical Field
The invention relates to the technical field of equipment control, in particular to a defrosting control method and device.
Background
With the increasing of refrigeration needs, a condensing unit is more and more widely applied to various refrigerators and plays roles of storage, storage and precooling in a cold chain, wherein the working condition of the unit application is generally lower than that of an air conditioner, the running time is long, and the problem of frosting is relatively serious, while the current defrosting mode usually enters, stops defrosting at fixed time or reaches a certain temperature, and the operation method is simple.
In view of the above problems, no effective solution has been proposed.
Disclosure of Invention
The embodiment of the invention provides a defrosting control method and device, and aims to achieve efficient defrosting control.
In one aspect, a defrosting control method is provided, including:
under the condition that the unit is in a defrosting state, determining whether a defrosting exit condition is met;
if the defrosting exit condition is met, controlling the unit to exit defrosting and enter a refrigerating state;
acquiring a first real-time refrigerating capacity of the unit;
and comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity to adjust a defrosting exit condition.
In one embodiment, before determining whether the defrost exit condition is reached, further comprising:
under the condition of unit refrigeration, acquiring a second real-time refrigerating capacity of the unit;
determining whether the second real-time refrigerating capacity reaches a preset defrosting entering standard refrigerating capacity or not;
and if the second real-time refrigerating capacity reaches the defrosting standard refrigerating capacity, controlling the unit to enter a defrosting state.
In one embodiment, obtaining the second real-time cooling capacity of the unit comprises:
acquiring the temperature, pressure and flow of an inlet and an outlet of an evaporator of a unit in a refrigerating state;
and calculating to obtain a second real-time refrigerating capacity according to the temperature, the pressure and the flow.
In one embodiment, the defrost exit condition comprises: a defrosting exit time and/or a defrosting exit temperature.
In one embodiment, comparing the first real-time cooling capacity with a preset frost-free cooling capacity to adjust the defrosting exit condition comprises:
determining whether the frost is cleaned and defrosted;
under the condition that the defrosting is determined to be cleaned, increasing the defrosting exit time by a preset time amount to be used as the defrosting exit time after the defrosting exit time is reset;
and under the condition that the defrosting is not determined to be cleaned, increasing the defrosting exit temperature by a preset temperature amount to be used as the defrosting exit temperature after the defrosting exit temperature is reset.
In one embodiment, determining whether the frost has been cleaned comprises:
comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity;
if the frostless refrigerating capacity is reached, determining that the frost is cleaned and removed;
and if the frostless refrigerating capacity is not reached, determining that the frost is not cleaned and defrosted.
In one embodiment, obtaining a first real-time cooling capacity of the unit comprises:
acquiring the temperature, pressure and flow of an inlet and an outlet of an evaporator of a unit in a refrigerating state;
and calculating to obtain a first real-time refrigerating capacity according to the temperature, the pressure and the flow.
In one embodiment, acquiring the temperature, pressure and flow rate of an inlet and an outlet of an evaporator of a unit in a refrigerating state comprises:
acquiring the temperature of an inlet and an outlet through a temperature sensor arranged at the inlet and the outlet of the evaporator;
acquiring the pressure of an inlet and an outlet through a pressure sensor arranged at the inlet and the outlet of the evaporator;
the flow of the inlet and the outlet is obtained by a flowmeter arranged at the inlet and the outlet of the evaporator.
In another aspect, there is provided a defrosting control apparatus including:
the first determining module is used for determining whether a defrosting exit condition is met or not under the condition that the unit is in a defrosting state;
the first control module is used for controlling the unit to exit defrosting and enter a refrigerating state under the condition that the defrosting exit condition is determined to be met;
the first acquisition module is used for acquiring a first real-time refrigerating capacity of the unit;
and the adjusting module is used for comparing the first real-time refrigerating capacity with a preset frost-free refrigerating capacity so as to adjust a defrosting exit condition.
In one embodiment, the above apparatus further comprises:
the second acquisition module is used for acquiring a second real-time refrigerating capacity of the unit under the refrigerating condition of the unit before determining whether the defrosting exit condition is met;
the second determining module is used for determining whether the second real-time refrigerating capacity reaches a preset defrosting entering standard refrigerating capacity or not;
and the second control module is used for controlling the unit to enter a defrosting state under the condition that the second real-time refrigerating capacity reaches the defrosting standard refrigerating capacity.
In still another aspect, there is provided an air conditioner including: the defrosting control apparatus of any one of the above.
In yet another aspect, a network device is provided, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.
In a further aspect, a non-transitory computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the above-mentioned method.
In still another aspect, there is provided an air conditioner including: the defrosting control device is provided.
In yet another aspect, a network device is provided, including: a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the steps of the above method when executing the computer program.
In a further aspect, a non-transitory computer-readable storage medium is provided, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method described above.
In the above embodiment, when the unit is in the defrosting state, it is determined whether a defrosting exit condition is met, and if the defrosting exit condition is met, the unit is controlled to exit from the defrosting state and enter the cooling state, a first real-time cooling capacity of the unit is obtained, and the first real-time cooling capacity is compared with a preset frostless cooling capacity to adjust the defrosting exit condition. Namely, whether the defrosting exit condition needs to be adjusted or not is determined according to the frostless refrigerating capacity of the current working condition, so that the effect of more accurate defrosting exit condition is achieved. By means of the technical scheme, the technical problem that the existing defrosting control accuracy is not high is solved, and the technical effects of effectively improving the defrosting control accuracy and improving the defrosting efficiency are achieved.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a method flow diagram of a defrosting control method according to an embodiment of the invention;
FIG. 2 is a schematic diagram of an assembly system according to an embodiment of the present invention;
FIG. 3 is a flow chart of logic for determining a defrost into refrigeration capacity value in accordance with an embodiment of the present invention;
FIG. 4 is a logic flow diagram of normal operation according to an embodiment of the present invention;
fig. 5 is a block diagram of a defrosting control apparatus according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.
In order to solve the problem that in the existing defrosting mode, if the defrosting time is not accurately controlled or the defrosting is exited early, the defrosting is incomplete, and even the problem that the evaporator is frosted more and more seriously after a few frosting cycles is caused, in this example, a defrosting control method is provided, as shown in fig. 1, the method may include the following steps:
s101: under the condition that the unit is in a defrosting state, determining whether a defrosting exit condition is met;
s102: if the defrosting exit condition is met, controlling the unit to exit defrosting and enter a refrigerating state;
s103: acquiring a first real-time refrigerating capacity of the unit;
specifically, the temperature, pressure and flow of an inlet and an outlet of an evaporator of the unit in a refrigeration state can be obtained; and calculating to obtain a second real-time refrigerating capacity according to the temperature, the pressure and the flow.
In order to obtain the temperature, pressure and flow of the inlet and outlet of the evaporator of the unit in the refrigeration state, a temperature sensor, a pressure sensor and a flow meter can be arranged at the inlet and outlet of the evaporator.
S104: and comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity to adjust a defrosting exit condition.
The preset frost-free refrigerating capacity can be the frost-free refrigerating capacity preset for the evaporator by measuring indoor and outdoor temperatures, recording current working condition parameters, measuring evaporator outlet pressure and temperature, and compressor outlet pressure and temperature, pressure conversion enthalpy values, measuring refrigerant flow and the like during frost-free refrigerating operation of the unit, calculating and recording the refrigerating capacity obtained under the current working condition, and setting the calculated refrigerating capacity as the refrigerating capacity under the working condition.
In the above embodiment, in the case that the unit is in the defrosting state, it is determined whether a defrosting exit condition is met, and if the defrosting exit condition is met, the unit is controlled to exit from the defrosting state and enter the cooling state, a first real-time cooling capacity of the unit is obtained, and the first real-time cooling capacity is compared with a preset frostless cooling capacity to adjust the defrosting exit condition. Namely, whether the defrosting exit condition needs to be adjusted or not is determined according to the frostless refrigerating capacity of the current working condition, so that the effect of more accurate defrosting exit condition is achieved. By means of the technical scheme, the technical problem that the existing defrosting control accuracy is not high is solved, and the technical effects of effectively improving the defrosting control accuracy and improving the defrosting efficiency are achieved.
Specifically, the defrosting entering condition may also be determined based on the cooling capacity, for example, in the case of unit cooling, the second real-time cooling capacity of the unit is obtained; determining whether the second real-time refrigerating capacity reaches a preset defrosting entering standard refrigerating capacity or not; and if the second real-time refrigerating capacity reaches the defrosting standard refrigerating capacity, controlling the unit to enter a defrosting state. That is, the standard refrigerating capacity for entering defrosting can be preset, that is, if the refrigerating capacity reaches the value, it indicates that the defrosting state needs to be entered.
The preset defrosting entering standard refrigerating capacity can be set by setting initial defrosting entering time and defrosting exiting time, measuring indoor and outdoor temperature, recording current working condition parameters, measuring evaporator inlet and outlet temperature, converting pressure into enthalpy value, measuring refrigerant flow, calculating and recording refrigerating capacity obtained under the current working condition when the unit enters defrosting, and setting the calculated refrigerating capacity as the refrigerating capacity under the working condition, so as to be the evaporator defrosting entering standard refrigerating capacity.
When the unit operates in a frostless mode, the temperature and the humidity of the current internal and external environments can be recorded, when the unit frosts, the heat exchange capacity is reduced, the temperature reduction speed of the refrigeration house is slow, even the temperature reduction speed cannot be reduced, the heat exchange quantity of the evaporator is relatively long under the same working condition relative to the frostless operation, and the frosting condition of the unit is judged by comparing with the heat exchange quantity in normal operation. Therefore, the current state of the unit can be determined according to the refrigerating capacity, the defrosting entering and exiting time can be reasonably judged based on the refrigerating capacity, and the unit is controlled to defrost, so that the problem of incomplete defrosting can be solved, the energy consumption can be saved, and meanwhile, the temperature is accurately controlled.
The second real-time cooling capacity can be obtained as follows: acquiring the temperature, pressure and flow of an inlet and an outlet of an evaporator of a unit in a refrigerating state; and calculating to obtain a second real-time refrigerating capacity according to the temperature, the pressure and the flow.
In one embodiment, the defrosting exit condition may include: a defrosting exit time and/or a defrosting exit temperature. That is, whether to exit the defrosting state may be determined by the defrosting exit time, and may also be determined by the defrosting exit temperature.
When the first real-time refrigerating capacity is compared with the preset frostless refrigerating capacity to adjust the defrosting exit condition, whether the defrosting is clean or not can be determined; under the condition that the defrosting is determined to be cleaned, increasing the defrosting exit time by a preset time amount to be used as the defrosting exit time after the defrosting exit time is reset; and under the condition that the defrosting is not determined to be cleaned, increasing the defrosting exit temperature by a preset temperature amount to be used as the defrosting exit temperature after the defrosting exit temperature is reset. That is, it is determined whether or not the defrosting is clean by the cooling capacity, and then it is determined whether or not the defrosting exit condition needs to be adjusted.
Specifically, comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity; if the frostless refrigerating capacity is reached, determining that the frost is cleaned and removed; and if the frostless refrigerating capacity is not reached, determining that the frost is not cleaned and defrosted.
For the first real-time refrigerating capacity, the temperature, the pressure and the flow of an inlet and an outlet of an evaporator of the unit in a refrigerating state can be obtained; and calculating to obtain a first real-time refrigerating capacity according to the temperature, the pressure and the flow. Specifically, obtaining the temperature, the pressure, and the flow rate of the inlet and the outlet of the evaporator of the unit in the refrigeration state may include: acquiring the temperature of an inlet and an outlet through a temperature sensor arranged at the inlet and the outlet of the evaporator; acquiring the pressure of an inlet and an outlet through a pressure sensor arranged at the inlet and the outlet of the evaporator; the flow of the inlet and the outlet is obtained by a flowmeter arranged at the inlet and the outlet of the evaporator.
The above method is described below with reference to a specific example, however, it should be noted that the specific example is only for better describing the present application and is not to be construed as limiting the present application.
As shown in fig. 2, a temperature sensor, a pressure sensor and a flow meter are arranged at the inlet and the outlet of the evaporator, and the measured temperature, pressure and flow are used to determine the cooling capacity at the inlet and the outlet of the evaporator. When the unit operates in a refrigerating mode, when the refrigerating capacity calculated in the working condition is close to the refrigerating capacity measured when the unit sets defrosting to enter, defrosting is carried out; when the unit reaches defrosting exit time or defrosting exit temperature, the unit refrigerates again, the refrigerating capacity is measured again to be compared with the frostless refrigerating capacity of the current working condition, whether the defrosting time of the unit is too much or too little is judged, the defrosting time is adjusted automatically, the unit is guaranteed to enter a defrosting condition and is not changed, the condition that frosting is too serious is avoided, defrosting can be carried out in time, refrigerating efficiency is improved, the defrosting exit time can be optimized, the problem that frosting is too much or too little is avoided, and defrosting efficiency is improved.
Specifically, a variable frequency compressor can be used for calculating the refrigerating capacity of the evaporator, and a temperature sensor, a pressure sensor and a flowmeter are arranged at an inlet and an outlet of the evaporator, so that the heat exchange energy of the evaporator can be automatically calculated. When the unit is operated without frost, the temperature and the humidity of the current internal and external environment are recorded, when the unit is frosted, the heat exchange capacity is reduced, the temperature reduction speed of the refrigeration house is low, even the temperature can not be reduced, when the heat exchange quantity of the evaporator is operated relative to the frostless environment, under the same working condition, the time required by temperature reduction is relatively long, the frosting condition of the unit is judged by comparing with the heat exchange quantity in normal operation, the defrosting entering and exiting time is reasonably judged, the unit defrosting is controlled, the problem of incomplete defrosting can be solved, the energy consumption can be saved, and meanwhile, the temperature is accurately controlled.
During the frostless refrigeration operation of the unit, indoor and outdoor temperatures are measured, current working condition parameters are recorded, the pressure and the temperature of an outlet of an evaporator and the pressure and the temperature of an outlet of a compressor are measured and converted into an enthalpy value, the flow of refrigerant is measured, the refrigerating capacity obtained under the current working condition is calculated and recorded, and the calculated refrigerating capacity is set as the refrigerating capacity under the working condition and is the frostless standard refrigerating capacity of the evaporator.
Setting initial defrosting entry time and defrosting exit time, measuring indoor and outdoor temperatures, recording current working condition parameters, measuring evaporator inlet and outlet temperatures, converting pressure into enthalpy, measuring refrigerant flow when the unit enters defrosting, calculating and recording refrigerating capacity obtained under the current working condition, and setting the calculated refrigerating capacity as the refrigerating capacity under the working condition, which is the standard refrigerating capacity for the evaporator entering defrosting.
The unit is started immediately, enters a logic operation mode for determining defrosting and entering a refrigerating capacity, enters a defrosting period, when the defrosting exit time is reached, the initial defrosting exit temperature is not reached, the unit exits defrosting, enters refrigerating operation, calculates the refrigerating capacity, compares the refrigerating capacity with the initial frostless refrigerating operation refrigerating capacity, if the unit is judged to be frostless, the unit parameters are not changed, the unit enters a normal operation logic mode as shown in figure 3, the defrosting condition is changed into that the evaporator enters a defrosting standard refrigerating capacity, and the defrosting time can be changed until the unit is automatically adjusted to the optimal defrosting mode. In the current state, when the refrigerating capacity reaches the defrosting standard refrigerating capacity, the refrigerator enters defrosting, and the defrosting time or the defrosting temperature is up and then quit, so that the defrosting is ensured to be clean.
When the refrigerating capacity measured by the evaporator reaches, if frost exists, the unit is still in a logic operation mode for determining that the defrosting enters the refrigerating capacity, then the defrosting entering time is shortened, if the refrigerating time is too short, the defrosting time is changed to be increased, the defrosting time is increased, and the refrigerating capacity when the defrosting enters is recorded again.
During defrosting, the unit reaches defrosting exit temperature, refrigerating operation is carried out, whether defrosting is clean in the current state is judged, if yes, the current defrosting time +1min is recorded as new defrosting exit time, the unit enters a normal operation logic mode shown in figure 4, defrosting conditions are changed into evaporator entering defrosting standard refrigerating capacity, and defrosting time can be changed until the unit automatically adjusts to an optimal defrosting mode. If the defrosting is not clean, the unit is still in a logic operation mode for determining that the defrosting enters the refrigerating capacity, and the defrosting exit temperature is increased.
And if the defrosting time is increased or decreased for 3 times in the normal operation logic mode, re-entering the logic operation mode for determining the defrosting and entering the refrigerating capacity.
Specifically, as shown in fig. 3, the logic for determining the amount of defrost into refrigeration may include the following steps:
s1: refrigerating and defrosting at regular time;
s2: determining whether a defrosting temperature is reached, if the defrosting temperature is reached, performing step S3, if the defrosting temperature is not reached, performing step S6;
s3: determining whether the frost is clean, if the frost is clean, performing step S5, and if the frost is not clean, performing step S4;
s4: the set temperature for defrosting withdrawal is increased;
s5: changing the initial defrosting time to be the current defrosting time plus 1min, and then executing the step S10;
s6: determining whether the frost is clean, if the frost is clean, performing step S10, and if the frost is not clean, performing step S7;
s7: determining whether the cooling time reaches a minimum value, if not, performing step S8, otherwise, performing step S9;
s8: the refrigeration operation cycle time is shortened;
s9: the defrosting time is increased;
s10: and the defrosting exit condition is that the defrosting exits the refrigerating capacity and enters a normal operation logic.
The normal operation logic, which may be shown in FIG. 4, includes:
s1: refrigerating, and defrosting according to logic;
s2: determining whether the frost is clean, if so, performing step S3, and if not, performing step S6;
s3: determining whether the defrosting temperature is reached, if so, performing step S4, and if not, performing step S5;
s4: the defrosting time is shortened, and the step S7 is executed;
s5: go to step S7 instead of changing;
s6: the defrosting time is prolonged, and the step S7 is executed;
s7: respectively recording the prolonging times and the shortening times of the defrosting time of the unit;
s8: determining whether unit defrosting is prolonged once and shortened once, and circulating for three times, if yes, executing S9, and if not, executing S1;
s9: and entering a defrosting determination mode and entering a refrigerating capacity logic operation mode.
In the above example, the defrosting condition of the unit is comprehensively judged by measuring the defrosting temperature of the unit and the temperature of the refrigeration house, comparing the refrigerating capacity of the compressor during operation with the refrigerating capacity during frosting, automatically adjusting the most suitable defrosting mode of the current refrigeration house, reducing the defrosting power consumption, solving the problem of incomplete defrosting, and simultaneously keeping the temperature of the refrigeration house stable.
Based on the same inventive concept, the embodiment of the present invention further provides a defrosting control device, as described in the following embodiments. Because the principle of solving the problems of the defrosting control device is similar to that of the defrosting control method, the implementation of the defrosting control device can refer to the implementation of the defrosting control method, and repeated parts are not described again. As used hereinafter, the term "unit" or "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated. Fig. 5 is a block diagram of a defrosting control apparatus according to an embodiment of the present invention, and as shown in fig. 5, the defrosting control apparatus may include: the first determining module 501, the first controlling module 502, the first obtaining module 503 and the adjusting module 504, which will be described below.
A first determining module 501, configured to determine whether a defrosting exit condition is met when the unit is in a defrosting state;
the first control module 502 is used for controlling the unit to exit defrosting and enter a refrigeration state under the condition that the defrosting exit condition is determined to be reached;
a first obtaining module 503, configured to obtain a first real-time cooling capacity of the unit;
an adjusting module 504, configured to compare the first real-time cooling capacity with a preset frost-free cooling capacity, so as to adjust a defrosting exit condition.
In one embodiment, the defrosting control apparatus may further include: the second acquisition module is used for acquiring a second real-time refrigerating capacity of the unit under the refrigerating condition of the unit before determining whether the defrosting exit condition is met; the second determining module is used for determining whether the second real-time refrigerating capacity reaches a preset defrosting entering standard refrigerating capacity or not; and the second control module is used for controlling the unit to enter a defrosting state under the condition that the second real-time refrigerating capacity reaches the defrosting standard refrigerating capacity.
In an embodiment, the second obtaining module may be specifically configured to obtain a temperature, a pressure, and a flow rate of an inlet and an outlet of an evaporator of the unit in a refrigeration state; and calculating to obtain a second real-time refrigerating capacity according to the temperature, the pressure and the flow.
In one embodiment, the defrosting exit condition may include: a defrosting exit time and/or a defrosting exit temperature.
In one embodiment, the adjusting module may be specifically configured to determine whether the frost has been cleaned and defrosted; under the condition that the defrosting is determined to be cleaned, increasing the defrosting exit time by a preset time amount to be used as the defrosting exit time after the defrosting exit time is reset; and under the condition that the defrosting is not determined to be cleaned, increasing the defrosting exit temperature by a preset temperature amount to be used as the defrosting exit temperature after the defrosting exit temperature is reset.
In one embodiment, the determining whether the frost is cleaned may include: comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity; if the frostless refrigerating capacity is reached, determining that the frost is cleaned and removed; and if the frostless refrigerating capacity is not reached, determining that the frost is not cleaned and defrosted.
In one embodiment, the first obtaining module may specifically obtain a temperature, a pressure, and a flow rate of an inlet and an outlet of an evaporator of the unit in a refrigeration state; and calculating to obtain a first real-time refrigerating capacity according to the temperature, the pressure and the flow.
In one embodiment, the first obtaining module may specifically obtain the temperature of the inlet and the outlet through a temperature sensor disposed at the inlet and the outlet of the evaporator; acquiring the pressure of an inlet and an outlet through a pressure sensor arranged at the inlet and the outlet of the evaporator; the flow of the inlet and the outlet is obtained by a flowmeter arranged at the inlet and the outlet of the evaporator.
In another embodiment, a software is provided, which is used to execute the technical solutions described in the above embodiments and preferred embodiments.
In another embodiment, a storage medium is provided, in which the software is stored, and the storage medium includes but is not limited to: optical disks, floppy disks, hard disks, erasable memory, etc.
From the above description, it can be seen that the embodiments of the present invention achieve the following technical effects: under the condition that the unit is in a defrosting state, whether a defrosting exit condition is met or not is determined, if the defrosting exit condition is met, the unit is controlled to exit from a defrosting state and enter a refrigerating state, a first real-time refrigerating capacity of the unit is obtained, and the first real-time refrigerating capacity is compared with a preset frostless refrigerating capacity to adjust the defrosting exit condition. Namely, whether the defrosting exit condition needs to be adjusted or not is determined according to the frostless refrigerating capacity of the current working condition, so that the effect of more accurate defrosting exit condition is achieved. By means of the technical scheme, the technical problem that the existing defrosting control accuracy is not high is solved, and the technical effects of effectively improving the defrosting control accuracy and improving the defrosting efficiency are achieved.
Although various specific embodiments are mentioned in the disclosure of the present application, the present application is not limited to the cases described in the industry standards or the examples, and the like, and some industry standards or the embodiments slightly modified based on the implementation described in the custom manner or the examples can also achieve the same, equivalent or similar, or the expected implementation effects after the modifications. Embodiments employing such modified or transformed data acquisition, processing, output, determination, etc., may still fall within the scope of alternative embodiments of the present application.
Although the present application provides method steps as described in an embodiment or flowchart, more or fewer steps may be included based on conventional or non-inventive means. The order of steps recited in the embodiments is merely one manner of performing the steps in a multitude of orders and does not represent the only order of execution. When an apparatus or client product in practice executes, it may execute sequentially or in parallel (e.g., in a parallel processor or multithreaded processing environment, or even in a distributed data processing environment) according to the embodiments or methods shown in the figures. The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, the presence of additional identical or equivalent elements in a process, method, article, or apparatus that comprises the recited elements is not excluded.
The devices or modules and the like explained in the above embodiments may be specifically implemented by a computer chip or an entity, or implemented by a product with certain functions. For convenience of description, the above devices are described as being divided into various modules by functions, and are described separately. Of course, in implementing the present application, the functions of each module may be implemented in one or more pieces of software and/or hardware, or a module that implements the same function may be implemented by a combination of a plurality of sub-modules, and the like. The above-described apparatus embodiments are merely illustrative, and for example, the division of the modules is merely a logical division, and other divisions may be realized in practice, for example, a plurality of modules or components may be combined or integrated into another system, or some features may be omitted, or not executed.
Those skilled in the art will also appreciate that, in addition to implementing the controller as pure computer readable program code, the same functionality can be implemented by logically programming method steps such that the controller is in the form of logic gates, switches, application specific integrated circuits, programmable logic controllers, embedded microcontrollers and the like. Such a controller may therefore be considered as a hardware component, and the means included therein for performing the various functions may also be considered as a structure within the hardware component. Or even means for performing the functions may be regarded as being both a software module for performing the method and a structure within a hardware component.
The application may be described in the general context of computer-executable instructions, such as program modules, being executed by a computer. Generally, program modules include routines, programs, objects, components, data structures, classes, etc. that perform particular tasks or implement particular abstract data types. The application may also be practiced in distributed computing environments where tasks are performed by remote processing devices that are linked through a communications network. In a distributed computing environment, program modules may be located in both local and remote computer storage media including memory storage devices.
From the above description of the embodiments, it is clear to those skilled in the art that the present application can be implemented by software plus necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, or the like, and includes several instructions for enabling a computer device (which may be a personal computer, a mobile terminal, a server, or a network device) to execute the method according to the embodiments or some parts of the embodiments of the present application.
The embodiments in the present specification are described in a progressive manner, and the same or similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. The application is operational with numerous general purpose or special purpose computing system environments or configurations. For example: personal computers, server computers, hand-held or portable devices, tablet-type devices, multiprocessor systems, microprocessor-based systems, set top boxes, programmable electronic devices, network PCs, minicomputers, mainframe computers, distributed computing environments that include any of the above systems or devices, and the like.
While the present application has been described by way of examples, those of ordinary skill in the art will appreciate that there are numerous variations and permutations of the present application that do not depart from the spirit of the present application and that the appended embodiments are intended to include such variations and permutations without departing from the present application.
Claims (11)
1. A defrosting control method is characterized by comprising the following steps:
under the condition that the unit is in a defrosting state, determining whether a defrosting exit condition is met; the defrosting exit condition comprises: defrosting exit time and/or defrosting exit temperature;
if the defrosting exit condition is met, controlling the unit to exit defrosting and enter a refrigerating state;
acquiring a first real-time refrigerating capacity of the unit;
comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity to adjust a defrosting exit condition; which comprises the following steps: determining whether the frost is cleaned and defrosted; under the condition that the defrosting is determined to be cleaned, increasing the defrosting exit time by a preset time amount to be used as the defrosting exit time after the defrosting exit time is reset; and under the condition that the defrosting is not determined to be cleaned, increasing the defrosting exit temperature by a preset temperature amount to be used as the defrosting exit temperature after the defrosting exit temperature is reset.
2. The method of claim 1, further comprising, prior to determining whether a defrost exit condition is reached:
under the condition of unit refrigeration, acquiring a second real-time refrigerating capacity of the unit;
determining whether the second real-time refrigerating capacity reaches a preset defrosting entering standard refrigerating capacity or not;
and if the second real-time refrigerating capacity reaches the defrosting standard refrigerating capacity, controlling the unit to enter a defrosting state.
3. The method of claim 2, wherein obtaining a second real-time capacity of the unit comprises:
acquiring the temperature, pressure and flow of an inlet and an outlet of an evaporator of a unit in a refrigerating state;
and calculating to obtain a second real-time refrigerating capacity according to the temperature, the pressure and the flow.
4. The method of claim 1, wherein determining whether the frost has been cleaned comprises:
comparing the first real-time refrigerating capacity with a preset frostless refrigerating capacity;
if the frostless refrigerating capacity is reached, determining that the frost is cleaned and removed;
and if the frostless refrigerating capacity is not reached, determining that the frost is not cleaned and defrosted.
5. The method of claim 1, wherein obtaining a first real-time capacity of the unit comprises:
acquiring the temperature, pressure and flow of an inlet and an outlet of an evaporator of a unit in a refrigerating state;
and calculating to obtain a first real-time refrigerating capacity according to the temperature, the pressure and the flow.
6. The method of claim 5, wherein obtaining the temperature, pressure and flow rate at the inlet and outlet of the evaporator of the unit in a refrigerated state comprises:
acquiring the temperature of an inlet and an outlet through a temperature sensor arranged at the inlet and the outlet of the evaporator;
acquiring the pressure of an inlet and an outlet through a pressure sensor arranged at the inlet and the outlet of the evaporator;
the flow of the inlet and the outlet is obtained by a flowmeter arranged at the inlet and the outlet of the evaporator.
7. A defrosting control apparatus for implementing the defrosting control method according to any one of claims 1 to 6, characterized by comprising:
the first determining module is used for determining whether a defrosting exit condition is met or not under the condition that the unit is in a defrosting state;
the first control module is used for controlling the unit to exit defrosting and enter a refrigerating state under the condition that the defrosting exit condition is determined to be met;
the first acquisition module is used for acquiring a first real-time refrigerating capacity of the unit;
and the adjusting module is used for comparing the first real-time refrigerating capacity with a preset frost-free refrigerating capacity so as to adjust a defrosting exit condition.
8. The apparatus of claim 7, further comprising:
the second acquisition module is used for acquiring a second real-time refrigerating capacity of the unit under the refrigerating condition of the unit before determining whether the defrosting exit condition is met;
the second determining module is used for determining whether the second real-time refrigerating capacity reaches a preset defrosting entering standard refrigerating capacity or not;
and the second control module is used for controlling the unit to enter a defrosting state under the condition that the second real-time refrigerating capacity reaches the defrosting standard refrigerating capacity.
9. An air conditioner, comprising: the defrosting control apparatus of any one of claims 7 to 8.
10. A network device, comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method according to any of claims 1 to 6 when executing the computer program.
11. A non-transitory computer readable storage medium, having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the steps of the method of any of claims 1 to 6.
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| CN202010413962.5A CN111609665B (en) | 2020-05-15 | 2020-05-15 | Defrosting control method and device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113124623B (en) * | 2021-04-26 | 2022-05-10 | 珠海格力电器股份有限公司 | Defrosting control method and device for refrigeration equipment and condensing unit |
| CN113928572B (en) * | 2021-10-21 | 2023-08-15 | 珠海格力电器股份有限公司 | Defrosting control method for double-machine auxiliary cooling system |
| CN114562851A (en) * | 2022-03-28 | 2022-05-31 | 长虹美菱股份有限公司 | Refrigerator and defrosting control method thereof |
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