CN114440569A - Control method and system of heat pump drying equipment, storage medium and equipment - Google Patents

Control method and system of heat pump drying equipment, storage medium and equipment Download PDF

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Publication number
CN114440569A
CN114440569A CN202210128831.1A CN202210128831A CN114440569A CN 114440569 A CN114440569 A CN 114440569A CN 202210128831 A CN202210128831 A CN 202210128831A CN 114440569 A CN114440569 A CN 114440569A
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China
Prior art keywords
heat pump
pump drying
preset
self
drying equipment
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CN202210128831.1A
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Chinese (zh)
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CN114440569B (en
Inventor
张世航
贺春辉
卢浩贤
林声杰
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
    • F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B30/00—Heat pumps
    • F25B30/02—Heat pumps of the compression type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/001—Drying-air generating units, e.g. movable, independent of drying enclosure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/004—Nozzle assemblies; Air knives; Air distributors; Blow boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply
    • F26B21/08—Humidity
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B2200/00—Drying processes and machines for solid materials characterised by the specific requirements of the drying good
    • F26B2200/22—Tobacco leaves

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Drying Of Solid Materials (AREA)

Abstract

The invention provides a control method, a control system, a storage medium and a control device of heat pump drying equipment, wherein the heat pump drying equipment comprises an indoor heat exchanger, and the control method comprises the following steps: when the heat pump drying equipment starts a self-cleaning mode, acquiring the accumulated running time of the heat pump drying equipment; comparing the accumulated running time with a preset accumulated running time and determining a corresponding self-cleaning program; controlling the heat pump drying equipment to enter a self-cleaning program to self-clean the indoor heat exchanger; according to the method, the heat pump drying equipment is controlled to start the corresponding self-cleaning program during the accumulated operation, the matching degree of the accumulated operation time and the self-cleaning program is improved, accurate and efficient cleaning is realized, the cleaning efficiency is improved, the cleanliness of the surface of an indoor heat exchanger is ensured, the problems that the air supply resistance is large and the system operation energy consumption is high due to the fact that impurities on the surface of the indoor heat exchanger are more, and the problem that the cleaning effect is poor due to the fact that the accumulated operation time of the heat pump drying equipment is not matched with the self-cleaning program is solved.

Description

Control method and system of heat pump drying equipment, storage medium and equipment
Technical Field
The invention relates to the technical field of drying, in particular to a control method and system of heat pump drying equipment, a storage medium and equipment.
Background
With the continuous improvement of the environmental protection requirement and the further improvement of the baking quality of tobacco leaves, in recent years, tobacco departments begin to have tobacco baking rooms with heat pump drying equipment in the major provinces of tobacco production such as Yunnan, Henan, Fujian and the like. The heat pump drying equipment has the following advantages: high efficiency, energy saving and heat efficiency 3-8 times of that of conventional drying; the drying quality is good, and no tobacco leaf cracks appear; safe and reliable, and no pollution. The heat pump drying equipment for the tobacco runs under the environment of high temperature and high humidity and is filled with a large amount of tobacco leaf biomass transpiration volatilization, after the drying procedure is finished, the indoor heat exchanger is easy to stick more biomass impurities and part of soil dust, so that the air supply resistance of the indoor heat exchanger is increased, the system running energy consumption is increased, the anti-corrosion effect of the equipment is reduced, and the service life is damaged; because the heat pump drying equipment and the tobacco flue-curing house are provided with the fixed heat preservation air ducts, the cleaning, maintenance and maintenance work of the indoor heat exchanger is extremely inconvenient.
Disclosure of Invention
In view of the above, the invention provides a control method, a control system, a storage medium and a control device for a heat pump drying device, so as to solve the problems that an indoor heat exchanger in the prior art is large in air supply resistance, high in system operation energy consumption, complex and inconvenient in cleaning process and the like.
The invention provides a control method of heat pump drying equipment, wherein the heat pump drying equipment comprises an indoor heat exchanger, and the control method comprises the following steps:
when the heat pump drying equipment starts a self-cleaning mode, acquiring the accumulated running time of the heat pump drying equipment;
comparing the accumulated operation time length with a preset accumulated operation time length and determining a self-cleaning program corresponding to the preset accumulated operation time length;
and controlling the heat pump drying equipment to enter the self-cleaning program so as to self-clean the indoor heat exchanger.
Further optionally, the control method further includes:
under the self-cleaning program, controlling the heat pump drying equipment to circularly perform: and frosting operation, namely frosting the indoor heat exchanger, and after the frosting operation is finished, controlling the heat pump drying equipment to carry out defrosting operation so as to defrost the indoor heat exchanger, and circulating for corresponding preset times.
Further optionally, the heat pump drying device further includes a fresh air device, and the control method further includes:
acquiring a humidity value of a curing barn where the indoor heat exchanger is located;
judging whether the humidity value is greater than or equal to a preset relative humidity or not;
if not, the fresh air device is controlled to operate, and the humidity value is larger than or equal to the preset relative humidity.
Further optionally, control the operation of new trend device, make humidity value more than or equal to preset relative humidity includes:
and controlling the fresh air device to start and operate for a second preset time at intervals of a first preset time.
Further optionally, the heat pump drying device further includes an electronic expansion valve, a four-way valve, a compressor, an indoor fan, and an outdoor fan, and the control method further includes:
in the frosting operation process, the electronic expansion valve is controlled to reset and the running of the preset frosting steps is kept, the four-way valve is controlled to be electrified, the compressor is controlled to be started and run at a first preset frosting frequency, the indoor fan is controlled to stop running, and the outdoor fan is controlled to run at a second preset frosting frequency;
in the defrosting operation control process, the heat pump drying equipment is controlled to be powered off and then on, the electronic expansion valve is controlled to reset and keep running of preset defrosting steps, the four-way valve is controlled to be powered off, the compressor is controlled to be started and run at a first preset defrosting frequency, the indoor fan is controlled to stop running, and the outdoor fan is controlled to run at a second preset defrosting frequency.
Further optionally, the controlling the outdoor fan to operate at a second preset frosting frequency includes:
controlling the outdoor fan to run at a preset initial frequency and timing;
acquiring the output pressure of the compressor and determining the second preset frosting frequency;
and when the timing duration reaches the preset frosting duration, controlling the outdoor fan to operate at the second preset frosting frequency.
Further optionally, the controlling the outdoor fan to operate at a second preset defrosting frequency includes:
controlling the outdoor fan to run at a preset initial frequency and timing;
when the timing duration reaches a preset defrosting duration, controlling the outdoor fan to operate at the second preset defrosting frequency;
the second preset defrosting frequency is greater than the second preset frosting frequency.
Further optionally, the control method further includes:
in the frosting operation process, acquiring the tube temperature of the indoor heat exchanger, and judging whether the tube temperature is always less than or equal to a first preset tube temperature in a first preset time period;
if yes, judging that the frosting operation is finished;
in the defrosting operation process, acquiring the tube temperature of the indoor heat exchanger, and judging whether the tube temperature is always greater than a second preset tube temperature in a second preset time period;
and if so, judging that the defrosting operation is finished.
Further optionally, the drying program of the heat pump drying apparatus includes a plurality of drying cycles, each drying cycle including a drying phase and a moisture regaining phase; when the heat pump drying equipment operates each drying cycle, the heat pump drying equipment firstly enters the drying stage and then enters the moisture regaining stage;
the acquiring of the accumulated operation time of the heat pump drying equipment comprises:
and recording the running time of the heat pump drying equipment in the drying stage of each drying cycle, and accumulating to obtain the accumulated running time.
Further optionally, the self-cleaning mode comprises a first self-cleaning mode, and the control method further comprises:
when the heat pump drying equipment starts the first self-cleaning mode, the heat pump drying equipment enters the moisture regaining stage, and the heat pump drying equipment is in a standby mode;
and after the heat pump drying equipment enters a moisture regain stage of the drying cycle which is the closest to the accumulated running time and passes through a third preset time, controlling the heat pump drying equipment to enter the first self-cleaning mode from the standby mode.
Further optionally, the self-cleaning mode further comprises a second self-cleaning mode, and the control method further comprises:
when the heat pump drying equipment starts the second self-cleaning mode, after a drying program of the heat pump drying equipment is finished and a fourth preset time period passes, controlling the heat pump drying equipment to enter the second self-cleaning mode;
and the fourth preset time length is greater than the third preset time length.
Further optionally, the heat pump drying apparatus comprises a control panel, the control panel is provided with a first option and a second option; when the first option is selected to be turned on, the heat pump drying equipment can be controlled to turn on the first self-cleaning mode; when the second option selects 'on', the heat pump drying equipment can be controlled to start the second self-cleaning mode.
Further optionally, the self-cleaning program comprises a first self-cleaning program, a second self-cleaning program and a third self-cleaning program, and the control method further comprises:
when the accumulated running time is longer than or equal to a first preset accumulated running time, controlling the heat pump drying equipment to enter a first self-cleaning program;
when the accumulated running time is longer than or equal to a second preset accumulated running time and is shorter than a third preset accumulated running time, controlling the heat pump drying equipment to enter a second self-cleaning program;
when the accumulated running time is longer than or equal to a third preset accumulated running time, controlling the heat pump drying equipment to enter a third self-cleaning program;
wherein the first preset accumulated operating time length is less than the second preset accumulated operating time length; the preset times corresponding to the first self-cleaning program are smaller than the preset times corresponding to the second self-cleaning program; the second preset accumulated operation time length is smaller than the third preset accumulated operation time length, and the preset times corresponding to the second self-cleaning program are smaller than the preset times corresponding to the third self-cleaning program.
The invention also provides a control system of the tobacco heat pump drying equipment, which comprises the following components:
the acquisition unit is used for acquiring the accumulated running time of the tobacco heat pump drying equipment when the tobacco heat pump drying equipment starts a self-cleaning mode;
and the comparison unit is used for comparing the accumulated running time length with a preset accumulated running time length and determining a self-cleaning program corresponding to the preset accumulated running time length.
The invention also provides a control system of the tobacco heat pump drying equipment, which comprises the following components:
a memory for storing programs or instructions;
and the processor is used for realizing the control method of the heat pump drying equipment in any one of the above modes when processing the program or the instructions.
The present invention also provides a readable storage medium comprising:
a memory for storing a program or instructions which, when executed by the processor, implement the control method of the heat pump drying apparatus as defined in any one of the above.
The invention also provides tobacco heat pump drying equipment, which comprises:
the control system of the tobacco heat pump drying equipment is characterized in that the control system comprises a control system control module; and/or
The control system of the tobacco heat pump drying equipment is characterized in that the control system comprises a control system control module; and/or
A readable storage medium as described above.
Compared with the prior art, the invention has the following beneficial effects:
(1) comparing the accumulated running time of the heat pump drying equipment with the preset accumulated running time to determine a corresponding self-cleaning program, controlling the heat pump drying equipment to enter the self-cleaning program and self-clean the indoor heat exchanger, wherein different accumulated running times are used for different self-cleaning programs, so that the matching degree of the accumulated running time and the self-cleaning program is improved, the accurate and efficient cleaning is realized, the cleaning range is expanded, and the cleaning efficiency is improved; the problem of poor cleaning effect caused by mismatching of the accumulated running time of the heat pump drying equipment and a self-cleaning program is solved;
(2) by the operation of frosting and defrosting on the surface of the indoor heat exchanger, the indoor heat exchanger is automatically cleaned in time, extra cleaning equipment and cleaning water are not needed, the waste of water resources is avoided, the surface cleanliness of the indoor heat exchanger is ensured, and the problems of large occupied space, complex structure and high processing, assembling and maintaining costs of a cleaning device are solved; the uniformity of frosting and defrosting is ensured, and the self-cleaning effect of the indoor heat exchanger is further ensured;
(3) the humidity of a baking room where the drying equipment is located is monitored in real time, whether a fresh air device needs to be started to introduce outdoor wet air or not is intelligently judged, the humidity value of the baking room is improved, the frosting amount of a heat exchanger is enhanced, quick, large-coverage and effective frosting is realized, the frosting time is shortened, and the frosting efficiency is improved;
(4) the cleaning process of the indoor heat exchanger is optimized, and the problems of complexity, inconvenience in cleaning, incompleteness and incompleteness of the cleaning process of the indoor heat exchanger are solved; biomass impurities and partial soil dust adhered to the indoor heat exchanger in the baking process are effectively removed, the cleaning effect is improved, the system operation energy consumption is reduced, and the service life of equipment is prolonged;
(5) when the heat pump drying equipment starts the first self-cleaning mode, the heat pump drying equipment enters a moisture regain stage of the latest drying period and enters the first self-cleaning mode after a third preset time length, an indoor heat exchanger is cleaned in time, and the indoor heat exchanger is guaranteed to operate effectively; when the heat pump drying equipment starts the second self-cleaning mode, the drying program of the heat pump drying equipment is finished, and the heat pump drying equipment enters the second self-cleaning mode after a fourth preset time period, the self-cleaning program and the drying program are not interfered with each other, and the cleaning effect and the drying effect are ensured at the same time;
(6) the self-cleaning program comprises a first self-cleaning program, a second self-cleaning program and a third self-cleaning program, the corresponding times of frosting and defrosting are gradually increased, the degree of automation is high, the accumulated running time of the drying equipment is intelligently obtained, the corresponding self-cleaning program is automatically entered according to the accumulated running time, and labor saving and high efficiency are realized;
(7) and (3) spraying a cleaning agent on the surface of the indoor heat exchanger, and combining a third self-cleaning program to deeply clean the indoor heat exchanger, so that the removal of stubborn stain residues is more effective.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It should be apparent that the drawings in the following description are merely exemplary, and that other embodiments can be derived from the drawings provided by those of ordinary skill in the art without inventive effort.
The structures, the proportions, the sizes, and the like shown in the specification are only used for matching with the contents disclosed in the specification, so that those skilled in the art can understand and read the present invention, and do not limit the conditions for implementing the present invention, so that the present invention has no technical essence, and any modifications of the structures, changes of the proportion relation, or adjustments of the sizes, should still fall within the scope of the technical contents disclosed in the present invention without affecting the efficacy and the achievable purpose of the present invention.
Fig. 1 is a schematic flow chart of an embodiment of a control method of a heat pump drying device provided by the present invention.
Detailed Description
The present invention is described in terms of particular embodiments, other advantages and features of the invention will become apparent to those skilled in the art from the following disclosure, and it is to be understood that the described embodiments are merely exemplary of the invention and that it is not intended to limit the invention to the particular embodiments disclosed. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely a relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
Current heat pump drying equipment for tobacco moves under the high temperature and high humidity and the volatile environment of being full of a large amount of transpirations of tobacco leaf living beings, and after the stoving procedure, indoor heat exchanger glues glutinous more impurity, leads to indoor heat exchanger's air supply resistance increase, and system operation energy consumption uprises, and the anticorrosive effect of equipment reduces and the life-span is impaired, and indoor heat exchanger's clean maintenance is extremely inconvenient with the maintenance work.
The invention creatively provides a control method of heat pump drying equipment, the heat pump drying equipment comprises an indoor heat exchanger, and the control method comprises the following steps: when the heat pump drying equipment starts a self-cleaning mode, acquiring the accumulated running time of the heat pump drying equipment; comparing the accumulated running time with a preset accumulated running time and determining a corresponding self-cleaning program; controlling the heat pump drying equipment to enter a self-cleaning program to self-clean the indoor heat exchanger; according to the method, the heat pump drying equipment is controlled to start the corresponding self-cleaning program during the accumulated operation, the matching degree of the accumulated operation time and the self-cleaning program is improved, accurate and efficient cleaning is realized, the cleaning range is expanded, the cleaning efficiency is improved, the cleanliness of the surface of the indoor heat exchanger is guaranteed, the problems that the air supply resistance is large and the system operation energy consumption is high due to the fact that impurities on the surface of the indoor heat exchanger are much caused are solved, and the problem that the cleaning effect is poor due to the fact that the accumulated operation time of the heat pump drying equipment is not matched with the self-cleaning program is solved.
< control method >
As shown in fig. 1, the present embodiment provides a control method of a heat pump drying apparatus, where the heat pump drying apparatus includes an indoor heat exchanger, and the control method includes:
s1, when the heat pump drying equipment starts a self-cleaning mode, acquiring the accumulated running time of the heat pump drying equipment;
s2, comparing the accumulated running time with a preset accumulated running time and determining a self-cleaning program corresponding to the preset accumulated running time;
s3, controlling the heat pump drying equipment to enter a self-cleaning program so as to self-clean the indoor heat exchanger;
in conclusion, the accumulated operation time of the drying equipment is intelligently acquired, the heat pump drying equipment is controlled to start the corresponding self-cleaning program according to the accumulated operation time, the matching degree of the accumulated operation time and the self-cleaning program is improved, accurate and efficient cleaning is realized, the cleaning range is expanded, the cleaning efficiency is improved, the cleanliness of the surface of the indoor heat exchanger is ensured, biomass impurities and part of soil dust which are adhered to the indoor heat exchanger in the baking process are effectively removed, the cleaning effect is improved, the system operation energy consumption is reduced, the service life of the equipment is prolonged, and the problem that the cleaning effect is poor due to the fact that the accumulated operation time of the heat pump drying equipment is not matched with the self-cleaning program is solved.
Further, the self-cleaning process includes a first self-cleaning process, a second self-cleaning process, and a third self-cleaning process, and S3 includes:
s31, when the accumulated running time is longer than or equal to a first preset accumulated running time, controlling the heat pump drying equipment to enter a first self-cleaning program;
s32, when the accumulated running time is longer than or equal to a second preset accumulated running time and is shorter than a third preset accumulated running time, controlling the heat pump drying equipment to enter a second self-cleaning program;
s33, when the accumulated operation time length is greater than or equal to a third preset accumulated operation time length, controlling the heat pump drying equipment to enter a third self-cleaning program;
the first preset accumulated running time length is less than the second preset accumulated running time length; the preset times corresponding to the first self-cleaning program is smaller than the preset times corresponding to the second self-cleaning program; the second preset accumulated operation time length is less than a third preset accumulated operation time length, and the preset times corresponding to the second self-cleaning program are less than the preset times corresponding to the third self-cleaning program; different accumulated operation durations correspond to different self-cleaning programs, so that labor is saved, the efficiency is high, the time required by cleaning is shortened, and the cleanliness of the indoor heat exchanger is ensured;
specifically, the first preset accumulated operation time is 500 hours, the second preset accumulated operation time is 1000 hours, and the third preset accumulated operation time is 1500 hours; the heat pump drying equipment comprises a control panel, wherein the control panel is provided with a first self-cleaning program flag bit, a second self-cleaning program flag bit and a third self-cleaning program flag bit, the first self-cleaning program flag bit is displayed as 1 when the heat pump drying equipment enters a first self-cleaning program, and the first self-cleaning program flag bit is displayed as 0 when the heat pump drying equipment does not enter the first self-cleaning program; when the heat pump drying equipment enters a second self-cleaning program, the flag bit of the second self-cleaning program is displayed as 1, and when the heat pump drying equipment does not enter the second self-cleaning program, the flag bit of the second self-cleaning program is displayed as 0; when the heat pump drying equipment enters the third self-cleaning program, the flag bit of the third self-cleaning program is displayed as 1, and when the heat pump drying equipment does not enter the third self-cleaning program, the flag bit of the third self-cleaning program is displayed as 0.
In addition, under the self-cleaning program, the heat pump drying equipment is controlled to circularly perform: the defrosting operation is carried out, so that the indoor heat exchanger frosts, and after the defrosting operation is finished, the heat pump drying equipment is controlled to carry out defrosting operation, so that the indoor heat exchanger defrosts, and corresponding preset times are circulated;
the cleaning is timely, extra cleaning equipment and cleaning water are not needed, waste of water resources is avoided, the surface cleanliness of the indoor heat exchanger is guaranteed, and the problems that a cleaning device is large in occupied space, complex in structure and high in processing, assembling and maintaining cost are solved; the uniformity of frosting and defrosting is guaranteed, the self-cleaning effect of the indoor heat exchanger is further guaranteed, the cleaning process of the indoor heat exchanger is optimized, and the problems that the cleaning process of the indoor heat exchanger is complicated, inconvenient to clean, incomplete and incomplete are solved.
Further, the heat pump drying equipment also comprises an electronic expansion valve, a four-way valve, a compressor, an indoor fan and an outdoor fan, and the control method also comprises the following steps:
in the frosting operation process, the electronic expansion valve is controlled to reset and the operation of the preset frosting steps is kept, the four-way valve is controlled to be powered on, the compressor is controlled to be started and operated at a first preset frosting frequency, the indoor fan is controlled to stop operating, and the outdoor fan is controlled to operate at a second preset frosting frequency;
in the process of controlling the defrosting operation, the heat pump drying equipment is controlled to be powered off and then on, the electronic expansion valve is controlled to reset and keep the operation of the preset defrosting steps, the four-way valve is controlled to be powered off, the compressor is controlled to be started and operate at the first preset defrosting frequency, the indoor fan is controlled to stop operating, and the outdoor fan is controlled to operate at the second preset defrosting frequency.
Preferably, the controlling the outdoor fan to operate at the second preset frosting frequency includes:
s341, controlling the outdoor fan to operate at a preset initial frequency and timing;
s342, acquiring the output pressure of the compressor and determining a second preset frosting frequency;
s343, when the timing duration reaches the preset frosting duration, controlling the outdoor fan to operate at a second preset frosting frequency; specifically, the output pressure of the compressor is obtained through a pressure sensor, and the frosting time is preset to be 1 min;
controlling the outdoor fan to operate at a second preset defrosting frequency comprises the following steps:
s351, controlling the outdoor fan to operate at a preset initial frequency and timing;
s352, when the timing duration reaches a preset defrosting duration, controlling the outdoor fan to operate at a second preset defrosting frequency; specifically, the preset defrosting time is 1 min;
the second preset defrosting frequency is greater than the second preset frosting frequency.
Further, during the frosting operation, the control method further comprises:
s361, obtaining the tube temperature of the indoor heat exchanger, and judging whether the tube temperature is always less than or equal to a first preset tube temperature in a first preset time period;
s362, if yes, judging that the frosting operation is finished; specifically, the first preset pipe temperature is t1, -10 ℃ or more and t1 or more and-50 ℃, preferably t1 or more and-10 ℃; the first preset time period is T1, and T1 is more than or equal to 5min and less than or equal to 45 min;
during the defrosting operation, the control method further comprises:
s371, acquiring the tube temperature of the indoor heat exchanger, and judging whether the tube temperature is always greater than a second preset tube temperature in a second preset time period;
s372, if yes, judging that the defrosting operation is finished; specifically, the second preset pipe temperature is t2, and t2 is more than 25 ℃; the second preset time period is T2, T1 ═ 10 s;
therefore, the frosting and defrosting process can be accurately controlled, the frosting and defrosting time is shortened, the frosting and defrosting coverage is enlarged, and the frosting and defrosting efficiency is improved.
Further, the heat pump drying equipment also comprises a fresh air device, and the control method also comprises the following steps:
s41, acquiring the humidity value of the curing barn where the indoor heat exchanger is located;
s42, judging whether the humidity value is larger than or equal to the preset relative humidity;
s43, if not, controlling the operation of the fresh air device to enable the humidity value to be larger than or equal to the preset relative humidity;
s44, if yes, controlling the fresh air device to stop running;
specifically, a temperature sensor is arranged in the curing barn where the indoor heat exchanger is located and used for detecting the temperature of a dry-wet bulb in the curing barn in real time and converting the temperature into corresponding relative humidity, and the preset relative humidity is 45%; control new trend device operation in S43, make humidity value more than or equal to preset relative humidity include:
controlling the fresh air device to start every first preset time interval and operate for a second preset time interval; specifically, the first preset time is 2min, and the second preset time is 30 s;
therefore, the humidity of the baking room where the drying equipment is located is monitored in real time, whether the fresh air device needs to be opened or not is intelligently judged, the outdoor wet air is introduced, the humidity value of the baking room is improved, the frosting amount of the heat exchanger is enhanced, quick frosting, large coverage and effective frosting are achieved, the frosting time is shortened, and the frosting efficiency is improved.
It should be noted that the operation of the fresh air device may be controlled before or during the frosting operation, and preferably, the operation of the fresh air device is controlled before the frosting operation.
Further, the drying program of the heat pump drying equipment comprises a plurality of drying cycles, and each drying cycle comprises a drying stage and a moisture regaining stage; when the heat pump drying equipment operates each drying cycle, firstly entering a drying stage and then entering a moisture regaining stage; specifically, the drying period is 140h +2d, 140h is the time required by the drying stage, 2d is the time required by the moisture regaining stage, and the curing barn is naturally placed during the moisture regaining stage;
the step of acquiring the accumulated operation time of the heat pump drying equipment in the step S1 includes:
and recording the operation time of the heat pump drying equipment in the drying stage of each drying cycle, and accumulating to obtain the accumulated operation time.
Further, the self-cleaning mode includes a first self-cleaning mode, and the control method further includes:
when the heat pump drying equipment starts a first self-cleaning mode, the heat pump drying equipment enters a moisture regaining stage, and the heat pump drying equipment is in a standby mode;
after the heat pump drying equipment enters a moisture regain stage of a drying period which is the closest to the accumulated running time and passes through a third preset time, controlling the heat pump drying equipment to enter a first self-cleaning mode from a standby mode;
therefore, the indoor heat exchanger can be cleaned in time, and the effective operation of the indoor heat exchanger is ensured.
In addition, the self-cleaning mode further includes a second self-cleaning mode, and the control method further includes:
when the heat pump drying equipment starts the second self-cleaning mode, after the drying program of the heat pump drying equipment is finished and a fourth preset time period passes, controlling the heat pump drying equipment to enter the second self-cleaning mode;
the fourth preset time length is longer than the third preset time length; specifically, the third preset time period is 36h, and the fourth preset time period is 72 h;
therefore, the drying program of the heat pump drying equipment is totally cleaned once, the self-cleaning program and the drying program are not interfered with each other, and the cleaning effect and the drying effect are ensured.
Preferably, the control panel is provided with a first option and a second option; when the first option is selected to be turned on, the heat pump drying equipment can be controlled to turn on a first self-cleaning mode; when the second option selects 'turn on', the heat pump drying equipment can be controlled to turn on a second self-cleaning mode; the user can flexibly select the first self-cleaning mode or the second self-cleaning mode according to actual needs.
Further, in order to improve the cleaning effect, before the self-cleaning mode is started, an observation window is maintained by combining an indoor unit, a cleaning agent is sprayed on the surface of the indoor heat exchanger, and then the first self-cleaning mode or the second self-cleaning mode is started; the control panel is also provided with a third option, when the third option is used for hooking and selecting 'opening', the heat pump drying equipment directly enters a third self-cleaning program, the opening is deep and clean, and the removal of stubborn stains and residues is more effective.
< control System >
This embodiment still provides a tobacco heat pump drying equipment's control system, and control system includes:
the acquisition unit is used for acquiring the accumulated running time of the tobacco heat pump drying equipment when the self-cleaning mode of the tobacco heat pump drying equipment is started;
and the comparison unit is used for comparing the accumulated operation time length with the preset accumulated operation time length and determining the self-cleaning program corresponding to the preset accumulated operation time length.
This embodiment still provides a tobacco heat pump drying equipment's control system, and control system includes:
a memory for storing programs or instructions;
and the processor is used for realizing the control method of the heat pump drying equipment in any one of the above modes when processing programs or instructions.
The present embodiments also provide a readable storage medium, comprising:
a memory for storing a program or instructions, which when executed by the processor, implements a control method of a heat pump drying apparatus as described in any one of the above.
< drying apparatus >
The embodiment also provides a tobacco heat pump drying equipment, includes:
the control system of the tobacco heat pump drying equipment is characterized in that the control system comprises a control system control module; and/or
The control system of the tobacco heat pump drying equipment is characterized in that the control system comprises a control system control module; and/or
A readable storage medium as described above.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.

Claims (17)

1. A control method of a heat pump drying device, wherein the heat pump drying device comprises an indoor heat exchanger, and the control method comprises the following steps:
when the heat pump drying equipment starts a self-cleaning mode, acquiring the accumulated running time of the heat pump drying equipment;
comparing the accumulated operation time length with a preset accumulated operation time length and determining a self-cleaning program corresponding to the preset accumulated operation time length;
and controlling the heat pump drying equipment to enter the self-cleaning program so as to carry out self-cleaning on the indoor heat exchanger.
2. The control method of a heat pump drying apparatus according to claim 1, further comprising:
under the self-cleaning program, controlling the heat pump drying equipment to circularly perform: and frosting operation, namely frosting the indoor heat exchanger, and after the frosting operation is finished, controlling the heat pump drying equipment to carry out defrosting operation so as to defrost the indoor heat exchanger, and circulating for corresponding preset times.
3. The control method of the heat pump drying equipment according to claim 2, wherein the heat pump drying equipment further comprises a fresh air device, the control method further comprising:
acquiring a humidity value of a curing barn where the indoor heat exchanger is located;
judging whether the humidity value is greater than or equal to a preset relative humidity;
if not, the fresh air device is controlled to operate, and the humidity value is larger than or equal to the preset relative humidity.
4. The control method of the heat pump drying equipment according to claim 3, wherein the controlling the fresh air device to operate so that the humidity value is greater than or equal to the preset relative humidity comprises:
and controlling the fresh air device to start and operate for a second preset time at intervals of a first preset time.
5. The control method of a heat pump drying apparatus according to claim 2, wherein the heat pump drying apparatus further comprises an electronic expansion valve, a four-way valve, a compressor, an indoor fan and an outdoor fan, the control method further comprising:
in the frosting operation process, the electronic expansion valve is controlled to reset and the running of the preset frosting steps is kept, the four-way valve is controlled to be electrified, the compressor is controlled to be started and run at a first preset frosting frequency, the indoor fan is controlled to stop running, and the outdoor fan is controlled to run at a second preset frosting frequency;
in the defrosting operation control process, the heat pump drying equipment is controlled to be powered off and then on, the electronic expansion valve is controlled to reset and keep running of preset defrosting steps, the four-way valve is controlled to be powered off, the compressor is controlled to be started and run at a first preset defrosting frequency, the indoor fan is controlled to stop running, and the outdoor fan is controlled to run at a second preset defrosting frequency.
6. The control method of a heat pump drying apparatus according to claim 5, wherein the controlling the outdoor fan to operate at a second preset frosting frequency includes:
controlling the outdoor fan to run at a preset initial frequency and timing;
acquiring the output pressure of the compressor and determining the second preset frosting frequency;
and when the timing duration reaches the preset frosting duration, controlling the outdoor fan to operate at the second preset frosting frequency.
7. The control method of the heat pump drying equipment according to claim 5, wherein the controlling the outdoor fan to operate at a second preset defrosting frequency comprises:
controlling the outdoor fan to run at a preset initial frequency and timing;
when the timing duration reaches a preset defrosting duration, controlling the outdoor fan to operate at the second preset defrosting frequency;
the second preset defrosting frequency is greater than the second preset frosting frequency.
8. The control method of the heat pump drying apparatus according to claim 5, further comprising:
in the frosting operation process, acquiring the tube temperature of the indoor heat exchanger, and judging whether the tube temperature is always less than or equal to a first preset tube temperature in a first preset time period;
if yes, judging that the frosting operation is finished;
in the defrosting operation process, acquiring the tube temperature of the indoor heat exchanger, and judging whether the tube temperature is always greater than a second preset tube temperature in a second preset time period;
and if so, judging that the defrosting operation is finished.
9. The control method of the heat pump drying apparatus according to any one of claims 1 to 8, wherein a drying program of the heat pump drying apparatus includes a plurality of drying cycles, each of the drying cycles including a drying phase and a moisture regain phase; when the heat pump drying equipment operates each drying cycle, the heat pump drying equipment firstly enters the drying stage and then enters the moisture regaining stage;
the acquiring of the accumulated operation time of the heat pump drying equipment comprises:
and recording the running time of the heat pump drying equipment in the drying stage of each drying cycle, and accumulating to obtain the accumulated running time.
10. The control method of a heat pump drying apparatus of claim 9, wherein the self-cleaning mode includes a first self-cleaning mode, the control method further comprising:
when the heat pump drying equipment starts the first self-cleaning mode, the heat pump drying equipment enters the moisture regaining stage, and the heat pump drying equipment is in a standby mode;
and after the heat pump drying equipment enters a moisture regain stage of the drying cycle which is the closest to the accumulated running time and passes through a third preset time, controlling the heat pump drying equipment to enter the first self-cleaning mode from the standby mode.
11. The control method of a heat pump drying apparatus of claim 10, wherein the self-cleaning mode further includes a second self-cleaning mode, the control method further comprising:
when the heat pump drying equipment starts the second self-cleaning mode, after a drying program of the heat pump drying equipment is finished and a fourth preset time period passes, controlling the heat pump drying equipment to enter the second self-cleaning mode;
and the fourth preset time length is greater than the third preset time length.
12. The control method of the heat pump drying equipment according to claim 11, wherein the heat pump drying equipment comprises a control panel, the control panel is provided with a first option and a second option; when the first option is selected to be turned on, the heat pump drying equipment can be controlled to turn on the first self-cleaning mode; when the second option selects 'on', the heat pump drying equipment can be controlled to start the second self-cleaning mode.
13. The control method of a heat pump drying apparatus according to claim 2, wherein the self-cleaning process includes a first self-cleaning process, a second self-cleaning process, and a third self-cleaning process, the control method further comprising:
when the accumulated running time is longer than or equal to a first preset accumulated running time, controlling the heat pump drying equipment to enter a first self-cleaning program;
when the accumulated running time is longer than or equal to a second preset accumulated running time and is shorter than a third preset accumulated running time, controlling the heat pump drying equipment to enter a second self-cleaning program;
when the accumulated running time is longer than or equal to a third preset accumulated running time, controlling the heat pump drying equipment to enter a third self-cleaning program;
the first preset accumulated running time length is less than the second preset accumulated running time length; the preset times corresponding to the first self-cleaning program are smaller than the preset times corresponding to the second self-cleaning program; the second preset accumulated operation time length is smaller than the third preset accumulated operation time length, and the preset times corresponding to the second self-cleaning program are smaller than the preset times corresponding to the third self-cleaning program.
14. A control system of tobacco heat pump drying equipment is characterized in that the control system comprises:
the acquisition unit is used for acquiring the accumulated running time of the tobacco heat pump drying equipment when the tobacco heat pump drying equipment starts a self-cleaning mode;
and the comparison unit is used for comparing the accumulated running time length with a preset accumulated running time length and determining a self-cleaning program corresponding to the preset accumulated running time length.
15. A control system of tobacco heat pump drying equipment is characterized in that the control system comprises:
a memory for storing programs or instructions;
a processor for implementing the control method of the heat pump drying apparatus according to any one of claims 1 to 13 when processing the program or instructions.
16. A readable storage medium, comprising:
a memory for storing a program or instructions which, when executed by the processor, implement the control method of the heat pump drying apparatus of any one of claims 1 to 13.
17. The utility model provides a tobacco heat pump drying equipment which characterized in that includes:
the control system of the tobacco heat pump drying apparatus of claim 14; and/or
The control system of the tobacco heat pump drying apparatus of claim 15; and/or
The readable storage medium of claim 16.
CN202210128831.1A 2022-02-11 2022-02-11 Control method and system of heat pump drying equipment, storage medium and equipment Active CN114440569B (en)

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