CN113432249B - Defrosting control method and device based on fan state - Google Patents
Defrosting control method and device based on fan state Download PDFInfo
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- CN113432249B CN113432249B CN202110610213.6A CN202110610213A CN113432249B CN 113432249 B CN113432249 B CN 113432249B CN 202110610213 A CN202110610213 A CN 202110610213A CN 113432249 B CN113432249 B CN 113432249B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/54—Control or safety arrangements characterised by user interfaces or communication using one central controller connected to several sub-controllers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The embodiment of the application discloses a defrosting control method and device based on a fan state. According to the technical scheme provided by the embodiment of the application, the running rotating speed of the fan at the corresponding moment is recorded as the initial rotating speed of the fan, and the power of the fan at the corresponding moment is recorded as the initial power of the fan; determining a corresponding rotating speed threshold range based on the initial rotating speed, determining a corresponding power threshold based on the initial power, detecting the real-time rotating speed and the real-time power of the fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the power threshold based on the real-time power, obtaining a corresponding comparison result, and performing unit defrosting control operation based on the comparison result. By adopting the technical means, the defrosting operation opportunity can be accurately determined according to the power of the fan, the unit is accurately controlled to perform defrosting control operation, the defrosting operation effect is further optimized, the situations of mistaken defrosting and untimely defrosting are avoided, and the unit heating efficiency is improved.
Description
Technical Field
The embodiment of the application relates to the technical field of heat pumps, in particular to a defrosting control method and device based on a fan state.
Background
The heat pump often has the condition that the fin frosts in the use, in order not to influence heat pump efficiency and normal use, need control the heat pump and carry out the self-defrosting operation. At present, the conventional defrosting control mode of a heat pump system is mainly characterized in that temperature sensing heads are arranged at positions such as a unit fin coil pipe and a compressor return pipe, the temperature states of the positions such as the unit fin coil pipe and the compressor return pipe are obtained, the frosting condition of fins is judged based on the comparison of the temperature value and a preset value, and the machine is controlled to perform defrosting operation in cooperation with the running time of the machine.
The defrosting mode can accurately judge the frosting condition based on the temperature state detection of the unit under the working condition of the environment temperature of more than-10 ℃. However, under the working condition of the environmental temperature below-10 ℃, because the temperature is too low, the attenuation of the temperature state of the finned coil and the air return pipe of the compressor before and after frosting is not obvious during the operation at the low temperature, the frosting condition cannot be accurately judged, and the condition of false defrosting is easy to occur under the low-temperature working condition. In addition, under the working condition of the ambient temperature above-10 ℃ but higher humidity, the higher the ambient humidity is, the faster the machine frosts. The defrosting mechanism of the unit is limited by the shortest running time, and the defrosting can not be carried out in time before the shortest running time is not reached, so that the phenomena that fins are over-frosted seriously, a machine cannot work normally or the defrosting is not clean and the like are caused.
Disclosure of Invention
The embodiment of the application provides a defrosting control method and device based on a fan state, which can accurately determine defrosting operation time, optimize defrosting operation effect and improve unit heating efficiency.
In a first aspect, an embodiment of the present application provides a defrosting control method based on a fan state, including:
after the compressor is started to operate for a set time period, recording the operating speed of the fan at the corresponding moment as the initial speed of the fan, and recording the power of the fan at the corresponding moment as the initial power of the fan;
determining a corresponding rotation speed threshold range based on the initial rotation speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold;
detecting the real-time rotating speed and the real-time power of the fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power to obtain corresponding comparison results, and performing unit defrosting control operation based on the comparison results.
Further, the unit defrosting control operation is performed based on the comparison result, and the unit defrosting control operation includes:
and if the real-time rotating speed is within the rotating speed threshold range, and the real-time power is between the second power threshold and the third power threshold, controlling the unit to perform defrosting operation when the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit reach corresponding preset values.
Further, the unit defrosting control operation is performed based on the comparison result, and the method further includes:
and if the real-time rotating speed is within the rotating speed threshold range and the real-time power is larger than the fourth power threshold, directly controlling the unit to perform defrosting operation.
Further, the unit defrosting control operation is performed based on the comparison result, and the method further includes:
and if the real-time rotating speed is within the rotating speed threshold range, and the real-time power is smaller than the first power threshold, neglecting the detection results of the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit, and closing the defrosting function by default.
Further, the unit defrosting control operation is performed based on the comparison result, and the method further includes:
and if the real-time rotating speed exceeds the rotating speed threshold range, controlling the unit to defrost when the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit reach corresponding preset values.
Further, the first power threshold, the second power threshold, the third power threshold, and the fourth power threshold are multiple values corresponding to the initial power, and the range of the rotational speed threshold is obtained by adding or subtracting a set number of revolutions with the initial rotational speed as a median.
Further, after the unit defrosting control operation is performed based on the comparison result, the method further includes:
and judging whether to quit the defrosting control program or not based on a condition parameter threshold, wherein the condition parameter threshold is set by actually measuring the parameter value of the corresponding associated parameter when the unit is completely defrosted.
In a second aspect, an embodiment of the present application provides a defrosting control device based on a fan status, including:
the recording module is used for recording the running rotating speed of the fan at the corresponding moment as the initial rotating speed of the fan and recording the power of the fan at the corresponding moment as the initial power of the fan after the compressor is started to run for a set time period;
the determining module is used for determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is larger than or equal to the first power threshold, the third power threshold is larger than the second power threshold, and the fourth power threshold is larger than or equal to the third power threshold;
and the comparison module is used for detecting the real-time rotating speed and the real-time power of the fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power to obtain corresponding comparison results, and performing unit defrosting control operation based on the comparison results.
In a third aspect, an embodiment of the present application provides an electronic device, including:
a memory and one or more processors;
the memory for storing one or more programs;
when the one or more programs are executed by the one or more processors, the one or more processors are caused to implement the fan status based defrost control method according to the first aspect.
In a fourth aspect, embodiments of the present application provide a storage medium containing computer-executable instructions that, when executed by a computer processor, are configured to perform a fan status based defrost control method as described in the first aspect.
According to the method and the device, after the compressor is started to operate for a set time period, the operating speed of the fan at the corresponding moment is recorded as the initial speed of the fan, and the power of the fan at the corresponding moment is recorded as the initial power of the fan; determining a corresponding rotation speed threshold range based on the initial rotation speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold; the method comprises the steps of detecting the real-time rotating speed and the real-time power of a fan, comparing the rotating speed threshold range based on the real-time rotating speed, obtaining a corresponding comparison result based on the real-time power, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold, and carrying out unit defrosting control operation based on the comparison result.
Drawings
Fig. 1 is a flowchart of a defrosting control method based on a fan status according to an embodiment of the present disclosure;
FIG. 2 is a flowchart illustrating a defrosting operation according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a defrosting control device based on a fan state according to a second embodiment of the present application;
fig. 4 is a schematic structural diagram of an electronic device according to a third embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, specific embodiments of the present application will be described in detail with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of and not restrictive on the broad application. It should be further noted that, for the convenience of description, only some but not all of the relevant portions of the present application are shown in the drawings. Before discussing exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although a flowchart may describe the operations (or steps) as a sequential process, many of the operations can be performed in parallel, concurrently or simultaneously. In addition, the order of the operations may be re-arranged. The process may be terminated when its operations are completed, but may have additional steps not included in the figure. The processes may correspond to methods, functions, procedures, subroutines, subprograms, and the like.
The application provides a defrosting control method based on fan state aims at accurately determining the defrosting control opportunity of the unit according to the real-time detection of the running state of the fan, optimizing the defrosting operation effect and improving the heating efficiency of the unit. Compared with the traditional heat pump defrosting control mechanism, when defrosting control is carried out, the defrosting operation time is generally judged according to the temperature of the fin coil, the temperature of the return air pipe and the operation time of the unit, and when the temperature of the fin coil, the temperature of the return air pipe and the operation time of the unit reach preset values, the unit is controlled to carry out defrosting operation. Because the temperature changes before and after the defrosting operation of the temperature of the fin coil and the temperature of the air return pipe under the low-temperature environment are not obvious, the operation of the defrosting operation is limited to a certain extent by the operation time of the unit, and the control mode cannot accurately determine the defrosting control time, so that the problems of wrong defrosting and unclean defrosting are caused. Based on this. The defrosting control method based on the fan state is provided to solve the technical problems of wrong defrosting, inaccurate defrosting control time and unclean defrosting existing in the existing defrosting control mechanism.
The first embodiment is as follows:
fig. 1 is a flowchart of a defrosting control method based on a fan state according to an embodiment of the present disclosure, where the defrosting control method based on a fan state provided in this embodiment may be executed by a defrosting control device based on a fan state, the defrosting control device based on a fan state may be implemented in software and/or hardware, and the defrosting control device based on a fan state may be formed by two or more physical entities or may be formed by one physical entity. Generally, the defrosting control device based on the fan state can be a processing device such as a controller of a heat pump unit.
The following description will be given taking the fan state-based defrosting control apparatus as an example of a main body that performs a fan state-based defrosting control method. Referring to fig. 1, the defrosting control method based on the fan state specifically includes:
and S110, after the compressor is started to operate for a set time period, recording the operating rotating speed of the fan at the corresponding moment as the initial rotating speed of the fan, and recording the power of the fan at the corresponding moment as the initial power of the fan.
Specifically, when the defrosting control is performed, the defrosting operation time of the heat pump is detected and judged based on the running state of the fan. The defrosting operation method mainly comprises the steps of detecting the running rotating speed and the fan power of the fan, and judging whether the defrosting operation is carried out or not according to the running rotating speed and the fan power of the fan. It should be noted that, when the heat pump unit is at a fixed rotation speed, the fan operation power and the fan static pressure of the heat pump unit show an obvious positive correlation, and the fan static pressure and the fin frosting condition show a positive correlation, then whether the fins of the heat pump unit are frosted can be effectively judged through the fan power. Based on this, this application embodiment is through detecting fan operating speed and fan power to confirm the opportunity of defrosting operation.
Before that, the initial power and the initial rotation speed of the fan need to be determined, so as to set a rotation speed threshold range and a power threshold of the fan according to the initial power and the initial rotation speed, and determine whether the current heat pump unit needs to perform defrosting operation or not by using the rotation speed threshold range and the power threshold.
For example, in the embodiment of the present application, after a heat pump unit is powered on or a defrosting operation is completed, a time node after a compressor is started to operate for a set time period (for example, 3 to 5 minutes) detects a fan power and a fan rotation speed, the fan rotation speed of the time node is used as an initial fan rotation speed, and the fan power of the time node is used as the initial fan power. It can be understood that, after the heat pump unit is powered on or defrosting operation is completed, initial rotation speed and initial power are set once and are used as the initial rotation speed and initial power of the current defrosting period, and the initial rotation speed and the initial power are set again every time a defrosting period is subsequently performed, so that real-time change of the running state of the fan of the heat pump unit is used, and a more accurate defrosting time determination result is provided.
S120, determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold.
Further, based on the determined initial rotation speed and initial power, the embodiment of the present application sets a rotation speed threshold range and a power threshold based on the initial rotation speed and the initial power. The first power threshold, the second power threshold, the third power threshold and the fourth power threshold are multiple values corresponding to the initial power, the range of the rotating speed threshold takes the initial rotating speed as a median, and the range of the rotating speed threshold is obtained by adding or subtracting a set number of revolutions. It can be understood that the range of the rotating speed threshold value and the power threshold value are used for comparing with the real-time rotating speed and the real-time power of the fan, and then whether the defrosting operation is started or not is judged.
For example, in the embodiment of the present application, according to an actual test, a fan rotation speed threshold range is set to be within +/- (2-5) revolutions of the fan initial rotation speed, for example, the fan rotation speed threshold range is set to be [ V-2, V +2], where "V" represents the initial rotation speed, and a corresponding fan rotation speed threshold range is obtained by adding and subtracting two units of revolutions on the basis of the initial rotation speed, so as to be used for subsequent comparison of the fan operation state. Similarly, the first power threshold of the fan is set to be 108% -115% times of the initial power, the second power threshold of the fan is set to be 115% -120% times of the initial power, the third power threshold of the fan is set to be 140% -150% times of the initial power, and the fourth power threshold of the fan is set to be 150% -160% times of the initial power. For example, the first power threshold is "110% P", the second power threshold is "115% P", the third power threshold is "145% P", the second power threshold is "160% P", wherein "P" represents the initial power, and the multiple value of the initial power is used as the corresponding power threshold for the subsequent fan operating state comparison. It should be noted that, in the embodiment of the present application, the rotation speed threshold range and the power threshold are determined based on the initial rotation speed and the initial power, and a reasonable boundary is set on the basis of the initial detection value according to the actual test, so as to facilitate the subsequent fan state comparison.
S130, detecting the real-time rotating speed and the real-time power of the fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power to obtain corresponding comparison results, and performing unit defrosting control operation based on the comparison results.
Finally, based on the determined fan rotating speed threshold range and fan power threshold, the embodiment of the application compares the real-time rotating speed and the real-time power of the fan with the fan rotating speed threshold range and the fan power threshold respectively, and then performs defrosting control operation on the fan.
Referring to fig. 2, if the real-time rotating speed is within the rotating speed threshold range, and the real-time power is between the second power threshold and the third power threshold, when the temperature of the finned coil, the temperature of the return air pipe and the operating time of the unit reach corresponding preset values, controlling the unit to perform defrosting operation; if the real-time rotating speed is within the rotating speed threshold range and the real-time power is larger than the fourth power threshold, directly controlling the unit to perform defrosting operation; if the real-time rotating speed is within the rotating speed threshold range, and the real-time power is smaller than the first power threshold, neglecting the detection results of the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit, and turning off the defrosting function by default; and if the real-time rotating speed exceeds the rotating speed threshold range, controlling the unit to defrost when the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit reach corresponding preset values.
Illustratively, based on the detection result of the running state of the fan, if the current real-time rotating speed of the fan is within +/-2-5 revolutions of the initial rotating speed of the fan, and the current real-time power of the fan is less than (108% -115%) of the initial power of the fan, even if the temperature of a coil of a fin of a unit, the temperature of a return air pipe and the running time reach corresponding preset values, because the power of the fan does not obviously rise, the fin of the machine is considered not frosted actually at the moment, and therefore the operation of defrosting operation is not started all the time; if the current real-time rotating speed of the fan is within +/-2-5 revolutions of the initial rotating speed of the fan, and the initial power (115% -120%) of the fan is less than the current real-time power (140% -150%) of the fan, when the temperature of a fin coil of the unit, the temperature of a return air pipe and the operating time reach a defrosting preset value, the unit fin is considered to be normally frosted, and the unit is controlled to enter a defrosting operation mode to start defrosting operation. And if the current rotating speed of the fan is within +/-2-5 revolutions of the initial rotating speed of the fan, and the initial power (150-160%) of the fan is less than the current power of the fan, no matter whether the temperature of a coil pipe of the fin of the unit, the temperature of a return air pipe and the running time reach corresponding preset values or not, the fin of the unit is considered to be frosted seriously, the unit is controlled to immediately enter a defrosting operation mode, and the defrosting operation is started. In addition, for the condition that the current real-time rotating speed of the fan exceeds the initial rotating speed of the fan plus or minus (2-5) revolutions, the correlation between the current running state of the fan and fin frosting is weak, at the moment, the defrosting time is judged directly according to the temperature of the coil pipe of the fin of the unit, the temperature of the return air pipe and the running time, when the temperature of the coil pipe of the fin of the unit, the temperature of the return air pipe and the running time reach the defrosting preset value, the fin of the unit is considered to be frosted normally, at the moment, the unit is controlled to enter a defrosting operation mode, and defrosting operation is started. It can be understood that the defrosting of the unit is judged in an auxiliary mode through the power of the fan, the problem that the defrosting is mistakenly carried out due to the fact that the temperatures of a fin coil and a return air pipe of the unit are too low under the condition that the low-temperature working condition is not frosted can be effectively solved, and the heating efficiency of the machine is improved. Meanwhile, the problem that the unit can not enter the defrosting operation quickly and timely under the high-humidity working condition can be solved effectively.
After the compressor is started to operate for a set time period, recording the operating speed of the fan at the corresponding moment as the initial speed of the fan, and recording the power of the fan at the corresponding moment as the initial power of the fan; determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold; the method comprises the steps of detecting the real-time rotating speed and the real-time power of a fan, comparing the rotating speed threshold range based on the real-time rotating speed, obtaining a corresponding comparison result based on the real-time power, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold, and carrying out unit defrosting control operation based on the comparison result.
In one embodiment, the heat pump unit further includes, after performing the unit defrosting control operation based on the comparison result: and judging whether to quit the defrosting control program or not based on a condition parameter threshold, wherein the condition parameter threshold is set by actually measuring the parameter value of the corresponding associated parameter when the unit is completely defrosted.
Specifically, the embodiment of the application identifies the timing of the heat pump exiting the defrosting program by the condition parameter threshold. When the corresponding associated parameter of the heat pump reaches the condition parameter threshold, it indicates that the heat pump meets the exit condition of the defrosting program at this time, and the current defrosting cycle can be ended. Wherein the related parameters are the discharge pressure, the discharge temperature and the evaporator temperature of the heat pump compressor. Based on these associated parameters, the condition parameter thresholds then correspond to an exhaust pressure threshold, an exhaust temperature threshold, and an evaporator temperature threshold. When the condition parameter threshold is set, the exhaust pressure, the exhaust temperature and the evaporator temperature information of the heat pump compressor after the evaporator is defrosted completely are actually detected, and the parameter values corresponding to the relevant parameters when the evaporator is defrosted completely are used as the initial condition parameter threshold of the heat pump. The initial condition parameter threshold is used in the heat pump defrosting exit control method in the embodiment of the application, and is used as the condition parameter threshold of the initial defrosting cycle to determine the exit time of the defrosting program corresponding to the defrosting cycle. And each time the heat pump unit is electrified, the initial condition parameter threshold value is used as the exit time of the defrosting program for judging the initial defrosting period. It can be understood that, since the initial condition parameter threshold is set according to the actual measurement value of the corresponding related parameter when the evaporator is defrosted, when the heat pump starts defrosting, if it is detected that the corresponding related parameter of the heat pump reaches the initial condition parameter threshold, it can be considered that the evaporator is defrosted at present. In the subsequent defrosting period, because the real-time condition of the evaporator changes, the condition parameter threshold value needs to be corrected, so that the corrected condition parameter threshold value can be used for accurately identifying the time when the heat pump exits the defrosting program.
The method comprises the steps of presetting a condition parameter threshold for marking that the heat pump exits the defrosting program, determining the defrosting exiting time of each defrosting cycle of the heat pump based on the condition parameter threshold, determining the interval time of two adjacent defrosting cycles by combining the defrosting entering time of each defrosting cycle, judging whether the interval time is shortened or not by comparing the two adjacent interval times, and if the interval time is shortened, correcting the condition parameter threshold according to a set correction value. By adopting the technical means, the defrosting exit condition of the heat pump can be adaptively corrected, the frost layer of the evaporator can be removed as far as possible, the condition that frost layer accumulation is enlarged due to incomplete defrosting is avoided, the energy efficiency of the heat pump is further ensured, and operation faults are avoided.
The second embodiment:
on the basis of the above embodiments, fig. 3 is a schematic structural diagram of a defrosting control device based on a fan state according to a second embodiment of the present application. Referring to fig. 3, the defrosting control device based on the fan status provided in this embodiment specifically includes: a recording module 21, a determining module 22 and a comparing module 23.
The recording module 21 is configured to record an operating speed of the fan at a corresponding moment as an initial speed of the fan and record a power of the fan at the corresponding moment as an initial power of the fan after the compressor is started to operate for a set time period;
the determining module 22 is configured to determine a corresponding rotation speed threshold range based on the initial rotation speed, and determine a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, where the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold;
the comparison module 23 is configured to detect a real-time rotation speed and a real-time power of the fan, compare the rotation speed threshold range based on the real-time rotation speed, compare the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power, obtain a corresponding comparison result, and perform a unit defrosting control operation based on the comparison result.
After the compressor is started to operate for a set time period, recording the operating speed of the fan at the corresponding moment as the initial speed of the fan, and recording the power of the fan at the corresponding moment as the initial power of the fan; determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold; the method comprises the steps of detecting the real-time rotating speed and the real-time power of a fan, comparing the rotating speed threshold range based on the real-time rotating speed, obtaining a corresponding comparison result based on the real-time power, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold, and carrying out unit defrosting control operation based on the comparison result.
The defrosting control device based on the fan state provided by the second embodiment of the application can be used for executing the defrosting control method based on the fan state provided by the first embodiment of the application, and has corresponding functions and beneficial effects.
Example three:
an embodiment of the present application provides an electronic device, and with reference to fig. 4, the electronic device includes: the device comprises a processor, a memory, a communication module, an input device and an output device. The number of processors in the electronic device may be one or more, and the number of memories in the electronic device may be one or more. The processor, memory, communication module, input device, and output device of the electronic device may be connected by a bus or other means.
The memory, as a computer-readable storage medium, may be used to store software programs, computer-executable programs, and modules, such as program instructions/modules corresponding to the fan state based defrost control method as described in any of the embodiments of the present application (e.g., a recording module, a determining module, and a comparing module in the fan state based defrost control apparatus). The memory can mainly comprise a program storage area and a data storage area, wherein the program storage area can store an operating system and an application program required by at least one function; the storage data area may store data created according to use of the device, and the like. Further, the memory may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other non-volatile solid state storage device. In some examples, the memory may further include memory located remotely from the processor, and these remote memories may be connected to the device over a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The communication module is used for data transmission.
The processor executes various functional applications and data processing of the device by running software programs, instructions and modules stored in the memory, namely, the defrosting control method based on the fan state is realized.
The input device may be used to receive input numeric or character information and to generate key signal inputs relating to user settings and function controls of the apparatus. The output device may include a display device such as a display screen.
The electronic device provided by the embodiment can be used for executing the defrosting control method based on the fan state provided by the embodiment one, and has corresponding functions and beneficial effects.
Example four:
embodiments of the present application further provide a storage medium containing computer-executable instructions, which when executed by a computer processor, are configured to perform a fan status-based defrost control method, including: after the compressor is started to operate for a set time period, recording the operating speed of the fan at the corresponding moment as the initial speed of the fan, and recording the power of the fan at the corresponding moment as the initial power of the fan; determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold; detecting the real-time rotating speed and the real-time power of the fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power to obtain corresponding comparison results, and performing unit defrosting control operation based on the comparison results.
Storage medium-any of various types of memory devices or storage devices. The term "storage medium" is intended to include: mounting media such as CD-ROM, floppy disk, or tape devices; computer system memory or random access memory such as DRAM, DDR RAM, SRAM, EDO RAM, lanbas (Rambus) RAM, etc.; non-volatile memory, such as flash memory, magnetic media (e.g., hard disk or optical storage); registers or other similar types of memory elements, etc. The storage medium may also include other types of memory or combinations thereof. In addition, the storage medium may be located in a first computer system in which the program is executed, or may be located in a different second computer system connected to the first computer system through a network (such as the internet). The second computer system may provide program instructions to the first computer for execution. The term "storage medium" may include two or more storage media residing in different locations, e.g., in different computer systems connected by a network. The storage medium may store program instructions (e.g., embodied as a computer program) that are executable by one or more processors.
Of course, the storage medium provided in the embodiments of the present application contains computer-executable instructions, and the computer-executable instructions are not limited to the above-described defrosting control method based on the fan status, and may also perform related operations in the defrosting control method based on the fan status provided in any embodiment of the present application.
The fan state based defrost control apparatus, the storage medium, and the electronic device provided in the above embodiments may perform the fan state based defrost control method provided in any embodiments of the present application, and refer to the fan state based defrost control method provided in any embodiments of the present application without detailed technical details described in the above embodiments.
The foregoing is considered as illustrative of the preferred embodiments of the invention and the technical principles employed. The present application is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present application has been described in more detail with reference to the above embodiments, the present application is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present application, and the scope of the present application is determined by the scope of the claims.
Claims (6)
1. A defrosting control method based on a fan state is characterized by comprising the following steps:
after the compressor is started to operate for a set time period, recording the operating speed of the fan at the corresponding moment as the initial speed of the fan, and recording the power of the fan at the corresponding moment as the initial power of the fan;
determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is greater than or equal to the first power threshold, the third power threshold is greater than the second power threshold, and the fourth power threshold is greater than or equal to the third power threshold;
detecting real-time rotating speed and real-time power of a fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power to obtain corresponding comparison results, and performing unit defrosting control operation based on the comparison results, wherein if the real-time rotating speed is within the rotating speed threshold range and the real-time power is between the second power threshold and the third power threshold, the unit is controlled to perform defrosting operation when the temperature of a finned coil, the temperature of a return air pipe and the running time of the unit reach corresponding preset values; if the real-time rotating speed is within the rotating speed threshold range and the real-time power is larger than the fourth power threshold, directly controlling the unit to perform defrosting operation; if the real-time rotating speed is within the rotating speed threshold range, and the real-time power is smaller than the first power threshold, neglecting the detection results of the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit, and turning off the defrosting function by default; and if the real-time rotating speed exceeds the rotating speed threshold range, controlling the unit to defrost when the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit reach corresponding preset values.
2. The fan state-based defrosting control method according to claim 1, wherein the first power threshold, the second power threshold, the third power threshold, and the fourth power threshold are multiple values corresponding to the initial power, and the range of the rotational speed threshold is obtained by adding or subtracting a set number of revolutions with the initial rotational speed as a median.
3. The fan state-based defrosting control method according to claim 1, further comprising, after performing a unit defrosting control operation based on the comparison result:
and judging whether to exit the defrosting control program or not based on a condition parameter threshold value, wherein the condition parameter threshold value is set by actually measuring the parameter value of the corresponding associated parameter when the unit is completely defrosted.
4. The utility model provides a defrosting control device based on fan state which characterized in that includes:
the recording module is used for recording the running rotating speed of the fan at the corresponding moment as the initial rotating speed of the fan and recording the power of the fan at the corresponding moment as the initial power of the fan after the compressor is started to run for a set time period;
the determining module is used for determining a corresponding rotating speed threshold range based on the initial rotating speed, and determining a corresponding first power threshold, a second power threshold, a third power threshold and a fourth power threshold based on the initial power, wherein the second power threshold is larger than or equal to the first power threshold, the third power threshold is larger than the second power threshold, and the fourth power threshold is larger than or equal to the third power threshold;
the comparison module is used for detecting the real-time rotating speed and the real-time power of the fan, comparing the rotating speed threshold range based on the real-time rotating speed, comparing the first power threshold, the second power threshold, the third power threshold and the fourth power threshold based on the real-time power to obtain corresponding comparison results, and performing unit defrosting control operation based on the comparison results, wherein if the real-time rotating speed is within the rotating speed threshold range and the real-time power is between the second power threshold and the third power threshold, the unit is controlled to perform defrosting operation when the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit reach corresponding preset values; if the real-time rotating speed is within the rotating speed threshold range and the real-time power is larger than the fourth power threshold, directly controlling the unit to perform defrosting operation; if the real-time rotating speed is within the rotating speed threshold range, and the real-time power is smaller than the first power threshold, neglecting the detection results of the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit, and turning off the defrosting function by default; and if the real-time rotating speed exceeds the rotating speed threshold range, controlling the unit to defrost when the temperature of the finned coil, the temperature of the return air pipe and the running time of the unit reach corresponding preset values.
5. An electronic device, comprising:
a memory and one or more processors;
the memory to store one or more programs;
when executed by the one or more processors, cause the one or more processors to implement a fan status based defrost control method as defined in any of claims 1-3.
6. A storage medium containing computer executable instructions which when executed by a computer processor are operable to perform a fan condition based defrost control method according to any of claims 1-3.
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| CN105588267A (en) * | 2015-05-29 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Defrosting control method and device for automatically detecting frost quantity of heat pump system |
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| JP6071648B2 (en) * | 2013-03-01 | 2017-02-01 | 三菱電機株式会社 | Air conditioner |
| US10168067B2 (en) * | 2015-09-22 | 2019-01-01 | Lennox Industries Inc. | Detecting and handling a blocked condition in the coil |
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| CN104061650A (en) * | 2013-03-19 | 2014-09-24 | 约克广州空调冷冻设备有限公司 | Frosting judgment method of air-cooled heat pump air conditioner |
| CN105588267A (en) * | 2015-05-29 | 2016-05-18 | 青岛海信日立空调系统有限公司 | Defrosting control method and device for automatically detecting frost quantity of heat pump system |
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