CN113959192B - Method and device for self-cleaning of heat pump dryer, heat pump dryer and storage medium - Google Patents
Method and device for self-cleaning of heat pump dryer, heat pump dryer and storage medium Download PDFInfo
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- CN113959192B CN113959192B CN202111205815.XA CN202111205815A CN113959192B CN 113959192 B CN113959192 B CN 113959192B CN 202111205815 A CN202111205815 A CN 202111205815A CN 113959192 B CN113959192 B CN 113959192B
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- 238000004140 cleaning Methods 0.000 title claims abstract description 56
- 238000000034 method Methods 0.000 title claims abstract description 48
- 238000007791 dehumidification Methods 0.000 claims abstract description 152
- 238000001035 drying Methods 0.000 claims abstract description 92
- 239000003507 refrigerant Substances 0.000 claims description 23
- 238000010438 heat treatment Methods 0.000 claims description 12
- 238000007664 blowing Methods 0.000 claims description 8
- 238000010257 thawing Methods 0.000 abstract description 11
- 230000001960 triggered effect Effects 0.000 description 17
- 239000007788 liquid Substances 0.000 description 15
- 238000010586 diagram Methods 0.000 description 11
- 238000004891 communication Methods 0.000 description 5
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- 238000005057 refrigeration Methods 0.000 description 5
- 238000004590 computer program Methods 0.000 description 4
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- 238000005485 electric heating Methods 0.000 description 1
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Classifications
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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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- 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
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- 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
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- 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
- F26B21/10—Temperature; Pressure
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
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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
Abstract
The application relates to the technical field of heat pump dryers, and discloses a method for self-cleaning of a heat pump dryer, which comprises the following steps: triggering the first drying system to be in a stop running state, and triggering the second electronic expansion valve to be in a closed state; adjusting the valve opening degree of the dehumidification electronic expansion valve to enable the temperature of a coil of the dehumidification evaporator to be within a set temperature range; and triggering the second compressor to stop running after the temperature of the coil of the dehumidification evaporator is in the set temperature interval for a preset duration. The second electronic expansion valve is closed by stopping the operation of the first drying system, the second evaporator stops refrigerating, the valve opening of the electronic expansion valve is adjusted, the surface of the dehumidifying evaporator frosts, and the second compressor is stopped after the operation lasts for the preset time, so that the surface of the dehumidifying evaporator stops refrigerating and defrosting are carried out, and self-cleaning of the heat pump dryer is achieved. The application also discloses a device for self-cleaning of the heat pump dryer, the heat pump dryer and a storage medium.
Description
Technical Field
The present disclosure relates to the field of heat pump dryer technologies, and for example, to a method and an apparatus for self-cleaning a heat pump dryer, and a storage medium.
Background
At present, the heat pump dryer is widely applied to various fields, including the fields of chemical industry, medicine, products, wood, agricultural and sideline products and the like, and has the advantages of safety, environmental protection, energy conservation, high efficiency and the like. Most of existing heat pump dryers adopt two refrigerant circulating systems to run in parallel, each system is provided with a compressor, and the two compressors running in parallel are used for heating control so as to meet the drying requirements. The heat pump dryer needs to dehumidify return air in the drying process, so that dust and tar generated by materials in the drying process can be attached to the dehumidifying part, the dehumidifying efficiency is reduced, and the service life of the dehumidifying part can be reduced. Cleaning of the dehumidifying part is therefore required.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for self-cleaning of a heat pump dryer, the heat pump dryer and a storage medium, so as to be capable of self-cleaning a dehumidifying part of the heat pump dryer.
In some embodiments, the heat pump dryer includes a first drying system and a second drying system; the first drying system and the second drying system are both used for controlled heating, and the second drying system comprises a first refrigerant loop consisting of a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system also comprises a dehumidification evaporator and a dehumidification electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of a drying room in a controlled manner, and the dehumidification electronic expansion valve is used for controlling and adjusting the refrigerant flow of the dehumidification evaporator; the method for self-cleaning of the heat pump dryer comprises the following steps: triggering the first drying system to be in a stop running state, and triggering the second electronic expansion valve to be in a closed state; adjusting the valve opening degree of the dehumidification electronic expansion valve to enable the temperature of a coil of the dehumidification evaporator to be within a set temperature range; and triggering the second compressor to stop running after the temperature of the coil of the dehumidification evaporator is in a set temperature interval for a preset duration.
In some embodiments, the heat pump dryer includes a first drying system and a second drying system; the first drying system and the second drying system are both used for controlled heating, and the second drying system comprises a first refrigerant loop consisting of a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system also comprises a dehumidification evaporator and a dehumidification electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of a drying room in a controlled manner, and the dehumidification electronic expansion valve is used for controlling and adjusting the refrigerant flow of the dehumidification evaporator; the device for self-cleaning of the heat pump dryer comprises: the first triggering module is configured to trigger the first drying system to be in a stop operation state and trigger the second electronic expansion valve to be in a closed state; the adjusting module is configured to adjust the valve opening degree of the dehumidification electronic expansion valve to enable the temperature of a coil of the dehumidification evaporator to be in a set temperature interval; the second triggering module is configured to trigger the second compressor to stop running after the temperature of the coil of the dehumidification evaporator is in a set temperature interval for a preset time period.
In some embodiments, the apparatus for self-cleaning of heat pump dryer includes a processor and a memory storing program instructions, and the processor is configured to execute the above method for self-cleaning of heat pump dryer when executing the program instructions.
In some embodiments, the heat pump dryer includes: the device for self-cleaning of the heat pump dryer is described above.
In some embodiments, the storage medium stores program instructions that, when executed, perform the above-described method for heat pump dryer self-cleaning.
The method and the device for self-cleaning of the heat pump dryer, the heat pump dryer and the storage medium provided by the embodiment of the disclosure can realize the following technical effects: the method comprises the steps of triggering a first drying system to be in a stop operation state, triggering a second electronic expansion valve to be in a closed state, stopping refrigeration of a second evaporator, adjusting the valve opening degree of a dehumidification electronic expansion valve to enable the temperature of a coil of the dehumidification evaporator to be in a set temperature range, enabling the dehumidification evaporator to refrigerate, reducing the air temperature of an area near the dehumidification evaporator, enabling the surface of the dehumidification evaporator to be frosted, triggering a second compressor to stop operation after the temperature of the coil of the dehumidification evaporator is in the set temperature range for a preset duration, enabling the surface of the dehumidification evaporator to stop refrigeration and defrosting by stopping the second compressor after the surface of the dehumidification evaporator is frosted, and self-cleaning of a dehumidification part, namely the dehumidification evaporator, of the heat pump dryer.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated in the accompanying drawings, which correspond to the accompanying drawings and not in a limiting sense, in which elements having the same reference numeral designations represent like elements, and in which:
fig. 1 is a schematic structural diagram of a heat pump dryer according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram illustrating the circuit principle of a heat pump dryer according to an embodiment of the present disclosure;
FIG. 3 is a schematic diagram of a method for self-cleaning of a heat pump dryer provided in an embodiment of the present disclosure;
FIG. 4 is a schematic diagram of another method for heat pump dryer self-cleaning provided by an embodiment of the present disclosure;
FIG. 5 is a schematic view of an apparatus for self-cleaning of a heat pump dryer provided in accordance with an embodiment of the present disclosure;
fig. 6 is a schematic view of another device for self-cleaning of a heat pump dryer provided by the embodiment of the present disclosure.
Reference numerals:
1: a first evaporator; 2: a second evaporator; 3: a first gas-liquid separator; 4: a second gas-liquid separator; 5: a first low-voltage switch; 6: a second low voltage switch; 7: a first compressor; 8: a second compressor; 9: a first high voltage switch; 10: a second high voltage switch; 11: a first condenser; 12: a second condenser; 13: a first filter; 14: a second filter; 15: a dehumidification evaporator; 16: a first electronic expansion valve; 17: a second electronic expansion valve; 18: a dehumidification electronic expansion valve; 19: a condenser side fan; 20: a dehumidification evaporator side fan; 21: a fresh air valve; 22: an exhaust valve; 23: a control unit.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more, unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
The term "correspond" may refer to an association or binding relationship, and a corresponds to B refers to an association or binding relationship between a and B.
Referring to fig. 1, an embodiment of the present disclosure provides a heat pump dryer, and fig. 1 is a schematic structural diagram of the heat pump dryer. The heat pump dryer comprises a first system, a second system and a dehumidifying evaporator 15, wherein the first system comprises a first compressor 7, a first electronic expansion valve 16, a first evaporator 1, a first filter 13, a first condenser 11, a first low-pressure switch 5, a first high-pressure switch 9 and a first gas-liquid separator 3, and the second system comprises a second compressor 8, a second electronic expansion valve 17, a third electronic expansion valve 18, a second evaporator 2, a second filter 14, a second condenser 12, a second low-pressure switch 6, a second high-pressure switch 10 and a second gas-liquid separator 4. One end of a first compressor is connected with one end of a first high-pressure switch, the other end of the first compressor is connected with one end of a first low-pressure switch, the other end of the first low-pressure switch is connected with one end of a first gas-liquid separator, the other end of the first gas-liquid separator is connected with one end of a first evaporator, the other end of the first evaporator is connected with one end of a first electronic expansion valve, the other end of the first electronic expansion valve is connected with one end of a first filter, the other end of the first filter is connected with one end of a first condenser, and the other end of the first condenser is connected with the other end of the first high-pressure switch; one end of a second compressor is connected with one end of a second high-pressure switch, the other end of the second compressor is connected with one end of a second low-pressure switch, the other end of the second low-pressure switch is connected with one end of a second gas-liquid separator, the other end of the second gas-liquid separator is connected with one end of a second evaporator, the other end of the second evaporator is connected with one end of a second electronic expansion valve, the other end of the second electronic expansion valve is connected with one end of a second filter, the other end of the second filter is connected with one end of a second condenser, and the other end of the second condenser is connected with the other end of the second high-pressure switch; the other end of the second electronic expansion valve is also connected with one end of a third electronic expansion valve, the other end of the third electronic expansion valve is connected with one end of a dehumidification evaporator, and the other end of the dehumidification evaporator is connected with one end of the second evaporator.
Like this, through setting up first vapour and liquid separator and second vapour and liquid separator, can follow the gas-liquid that flows out in first evaporimeter and the second evaporimeter with liquid and gas separation, prevent that liquid refrigerant from getting into first compressor and second compressor and arousing the liquid volume, can guarantee first compressor and second compressor normal operating, avoid leading to first compressor and second compressor trouble because of the liquid volume.
Referring to fig. 2, the embodiment of the present disclosure provides a schematic diagram of a circuit principle of a heat pump dryer, as shown in fig. 2, the heat pump dryer controls a first compressor 7, a second compressor 8, a first electronic expansion valve 16, a second electronic expansion valve 17, a dehumidification electronic expansion valve 18, a condenser side fan 19, a dehumidification evaporator side fan 20, a fresh air valve 21, and an exhaust air valve 22 through a control unit 23; the control unit controls the opening of the first electronic expansion valve to enable the first system to heat; the second electronic expansion valve is arranged between the second evaporator and the second filter, the third electronic expansion valve is arranged between the dehumidification evaporator and the second filter, and the control unit controls the second electronic expansion valve to be opened and the third electronic expansion valve to be closed so that the second system can perform heating; the control unit controls the second electronic expansion valve to be closed and the third electronic expansion valve to be opened, so that the second system performs dehumidification; under the condition that the first system and the second system are used for heating, the control unit controls the auxiliary electric heating device to be started for heating; under the condition of frosting, adjusting the valve opening of the dehumidification electronic expansion valve to refrigerate the dehumidification evaporator and frosting the dehumidification evaporator; under the condition of frosting, opening a fresh air valve and an exhaust valve to prevent the dehumidifying evaporator and the second condenser from being in the same closed space; stopping operating the second compressor after the temperature of the coil of the dehumidifying evaporator is in the set temperature interval for a preset time period, so that the dehumidifying evaporator defrosts; the control unit improves the frosting or defrosting efficiency by controlling the condenser side fan and the condenser side fan.
Referring to fig. 3, an embodiment of the present disclosure provides a method for self-cleaning of a heat pump dryer, the heat pump dryer including a first drying system and a second drying system; the first drying system and the second drying system are used for controlled heating, and the second drying system comprises a first refrigerant loop consisting of a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system also comprises a dehumidification evaporator and a dehumidification electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of the drying room in a controlled manner, and the dehumidification electronic expansion valve is used for regulating the refrigerant flow of the dehumidification evaporator in a controlled manner; the method comprises the following steps:
and S301, triggering the first drying system to be in a stop operation state, and triggering the second electronic expansion valve to be in a closed state.
Step S302, adjusting the valve opening of the electronic dehumidification expansion valve to enable the dehumidification evaporator to refrigerate and enable the temperature of a coil of the dehumidification evaporator to be in a set temperature range.
And step S303, triggering the second compressor to stop running after the temperature of the coil of the dehumidification evaporator is in the set temperature interval for a preset time.
By adopting the method for self-cleaning the heat pump dryer provided by the embodiment of the disclosure, the first drying system is triggered to be in a stop operation state, the second electronic expansion valve is triggered to be in a closed state, the second evaporator stops refrigerating, then the temperature of the coil of the dehumidifying evaporator is in a set temperature interval by adjusting the valve opening degree of the dehumidifying electronic expansion valve, the dehumidifying evaporator is refrigerated, the air temperature in the area near the dehumidifying evaporator is reduced, the surface of the dehumidifying evaporator is frosted, and the second compressor is triggered to stop operating after the temperature of the coil of the dehumidifying evaporator is in the set temperature interval for a preset duration, so that after the surface of the dehumidifying evaporator is frosted, the second compressor is stopped to stop refrigerating the surface of the dehumidifying evaporator, and defrosting is performed, thereby self-cleaning a dehumidifying part, namely the dehumidifying evaporator, of the heat pump dryer, and self-cleaning of the heat pump dryer is realized.
Optionally, any value in the set temperature interval is less than or equal to the frosting temperature of the dehumidifying evaporator. Optionally, the temperature interval is set to-15 to-12 degrees celsius.
In some embodiments, the predetermined time period is 30 minutes.
Optionally, the heat pump dryer further comprises a condenser side fan and a dehumidification evaporator side fan; the condenser side fan is used for blowing air at the condenser side to the drying room, and the dehumidification evaporator side fan is used for blowing air to the dehumidification evaporator; when the valve opening degree of the dehumidification electronic expansion valve is adjusted, the method further comprises the following steps: and triggering the side fan of the condenser to operate at the highest wind speed, and triggering the side fan of the dehumidification evaporator to operate at the lowest wind speed.
Therefore, the temperature of the coil of the dehumidification evaporator is in a set temperature range by adjusting the opening degree of the dehumidification electronic expansion valve, the temperature of the air in the area near the dehumidification evaporator can be lower, the air side fan is triggered to operate at the highest wind speed, the air with lower temperature is blown to the second condenser and the drying room, the second condenser is enabled to exchange heat quickly, the refrigeration speed and efficiency of the dehumidification evaporator are accelerated, the air side fan is triggered to operate at the lowest wind speed, the heat exchange between the air with lower temperature in the area near the dehumidification evaporator and the air with higher temperature in other areas can be reduced, the air with lower temperature stays in the area near the dehumidification evaporator for a long time, and the surface frosting of the dehumidification evaporator is accelerated.
Optionally, the heat pump dryer further comprises a fresh air valve and an exhaust air valve; when the valve opening degree of the dehumidification electronic expansion valve is adjusted, the method further comprises the following steps: and triggering the fresh air valve and the exhaust valve to be in an opening state.
Because the dehumidification evaporator is less than preset distance with the second condenser, the distance is nearer promptly, so heat and the dehumidification evaporator is in the condition in a confined space with the second condenser at the second condenser, hardly fall the temperature of dehumidification evaporator below the temperature that frosts, consequently, be in the on-state through triggering fresh air valve and exhaust valve for dehumidification evaporator is in an unclosed space with the second condenser, makes the temperature of dehumidification evaporator easily fall below the temperature that frosts, saves the electric quantity.
Optionally, after triggering the second compressor to stop operating, the method further includes: and triggering a dehumidification evaporator side fan to operate at the maximum air quantity. Therefore, after the second compressor is triggered to stop running, the dehumidification evaporator side fan is triggered to run at the maximum air volume, so that after the dehumidification evaporator stops refrigerating, heat exchange between air with lower temperature in the area near the dehumidification evaporator and air with higher temperature in other areas is increased, the temperature of the air in the area near the dehumidification evaporator is rapidly increased, defrosting is accelerated, and self-cleaning is achieved.
Optionally, before triggering the first drying system to stop operating and triggering the second electronic expansion valve to close, the method further includes: determining whether the current date is a preset self-cleaning date; triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state, comprising the following steps: and under the condition that the current date is a preset self-cleaning date, triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state.
Optionally, the preset self-cleaning date is a start time of the frequent use of the heat pump dryer.
Optionally, before triggering the first drying system to stop operating and triggering the second electronic expansion valve to close, the method further includes: acquiring the operation time of the heat pump dryer; triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state, comprising the following steps: and under the condition that the running time of the heat pump dryer reaches a preset time threshold, triggering the first drying system to be in a running stop state and triggering the second electronic expansion valve to be in a closed state.
In some embodiments, the duration threshold is 400 hours.
Optionally, before triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state, the method further includes: setting a frequency of a second compressor of the second drying system to a preset frequency. Optionally, the preset frequency is 75Hz. Thus, by setting the frequency of the second compressor to 75Hz, not only can the second compressor be prevented from being failed due to load, but also the chips can be prevented from being overheated, and therefore the service lives of the second compressor and the chips are prolonged. Optionally, the chip has control of the frequency of the second compressor.
Referring to fig. 4, an embodiment of the present disclosure provides a method for self-cleaning of a heat pump dryer, the heat pump dryer including a first drying system and a second drying system; the first drying system and the second drying system are used for controlled heating, and the second drying system comprises a first refrigerant loop consisting of a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system also comprises a dehumidification evaporator and a dehumidification electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of the drying room in a controlled manner, and the dehumidification electronic expansion valve is used for regulating the refrigerant flow of the dehumidification evaporator in a controlled manner; the method for self-cleaning the heat pump dryer comprises the following steps:
step S401, obtaining the operation time of the heat pump dryer.
Step S402, under the condition that the running time of the heat pump dryer reaches a preset time threshold, triggering the first drying system to be in a running stop state and triggering the second electronic expansion valve to be in a closed state.
Step S403, adjusting the valve opening of the electronic dehumidification expansion valve to enable the dehumidification evaporator to refrigerate and enable the temperature of a coil of the dehumidification evaporator to be within a set temperature range; triggering a fan at the side of the condenser to operate at the highest wind speed, and triggering a fan at the side of the dehumidification evaporator to operate at the lowest wind speed; and triggering the fresh air valve and the exhaust valve to be in an opening state.
And step S404, after the temperature of the coil pipe of the dehumidification evaporator is in the set temperature interval for a preset time, triggering the second compressor to stop running.
And step S405, triggering a dehumidification evaporator side fan to operate at the maximum air quantity.
Thus, by obtaining the operation time of the heat pump dryer, and under the condition that the operation time reaches the preset time threshold, triggering the first drying system to stop operating and the second electronic expansion valve to close, then adjusting the valve opening of the electronic dehumidification expansion valve to make the coil temperature of the dehumidification evaporator at the frosting temperature, and by triggering the side fan of the condenser to operate at the highest wind speed, the heating efficiency of the second evaporator is improved, the side fan of the dehumidification evaporator is triggered to operate at the lowest wind speed, so as to reduce the heat exchange between the air with lower temperature in the area near the dehumidification evaporator and the air with higher temperature in other areas, so that the air with lower temperature stays in the area near the dehumidification evaporator for a long time, and the frosting on the surface of the dehumidification evaporator is accelerated, then triggering a fresh air valve and an exhaust valve to be in an opening state so as to enable the dehumidification evaporator and a second condenser to be in an unsealed space, reducing the difficulty of reducing the temperature of the dehumidification evaporator to the frosting temperature and accelerating the frosting, then triggering a second compressor to stop running after the temperature of a coil of the dehumidification evaporator is in a set temperature interval for a preset time, stopping the refrigeration of the dehumidification evaporator to prepare for defrosting, finally triggering a fan at the side of the dehumidification evaporator to run with the maximum air volume to accelerate the heat exchange between the air with lower temperature in the area near the dehumidification evaporator and the air with higher temperature in other areas so as to realize rapid defrosting, and continuously refrigerating the dehumidification evaporator to realize complete frosting after the temperature of the coil of the dehumidification evaporator is in the set temperature interval for the preset time; after the temperature of the coil pipe of the dehumidifying evaporator is in a set temperature interval for a preset time, the second compressor is triggered to stop running, namely, the dehumidifying evaporator is not enabled to refrigerate any more, defrosting is carried out, and therefore the dehumidifying part of the heat pump dryer, namely the dehumidifying evaporator, can be automatically cleaned.
Referring to fig. 5, an embodiment of the present disclosure provides an apparatus for self-cleaning of a heat pump dryer, where the heat pump dryer includes a first drying system and a second drying system; the first drying system and the second drying system are used for controlled heating, and the second drying system comprises a first refrigerant loop consisting of a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system also comprises a dehumidification evaporator and a dehumidification electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of the drying room in a controlled manner, and the dehumidification electronic expansion valve is used for regulating the refrigerant flow of the dehumidification evaporator in a controlled manner; the apparatus comprises a first triggering module 501, an adjusting module 502 and a second triggering module 503. The first triggering module 501 is configured to trigger the first drying system to be in a stop operation state and trigger the second electronic expansion valve to be in a closed state; the adjusting module 502 is configured to adjust the valve opening of the electronic dehumidification expansion valve, so that the dehumidification evaporator performs refrigeration and the coil temperature of the dehumidification evaporator is in a set temperature range; the second triggering module 503 is configured to trigger the second compressor to stop operating after the coil temperature of the dehumidification evaporator is in the set temperature interval for a preset duration.
By adopting the device for self-cleaning of the heat pump dryer provided by the embodiment of the disclosure, the first drying system is triggered to be in a stop operation state, the second electronic expansion valve is triggered to be in a closed state, the second evaporator stops refrigerating, then the temperature of the coil of the dehumidifying evaporator is in a set temperature interval by adjusting the valve opening degree of the dehumidifying electronic expansion valve, the dehumidifying evaporator is refrigerated, the air temperature of the area near the dehumidifying evaporator is reduced, the surface of the dehumidifying evaporator is frosted, and the second compressor is triggered to stop operating after the temperature of the coil of the dehumidifying evaporator is in the set temperature interval for a preset duration, so that after the surface of the dehumidifying evaporator is frosted, the surface of the dehumidifying evaporator stops refrigerating and defrosting are carried out by stopping the second compressor, and therefore the dehumidifying part of the heat pump dryer, namely the dehumidifying evaporator, can be self-cleaned.
Optionally, the heat pump dryer further comprises a condenser side fan and a dehumidification evaporator side fan; the condenser side fan is used for blowing air at the second condenser side to the drying room, and the dehumidification evaporator side fan is used for blowing air to the dehumidification evaporator; the device for self-cleaning the heat pump dryer also comprises a third triggering module; and the third triggering module is configured to trigger the condenser side fan to operate at the highest wind speed and trigger the dehumidification evaporator side fan to operate at the lowest wind speed.
Optionally, the heat pump dryer further comprises a fresh air valve and an exhaust air valve; the device for self-cleaning the heat pump dryer also comprises a fourth trigger module; and the fourth triggering module is configured to trigger the fresh air valve and the exhaust air valve to be in an opening state.
Optionally, the device for self-cleaning of heat pump dryer further comprises a fifth trigger module; and the fifth trigger module is configured to trigger the dehumidification evaporator side fan to operate at the maximum air quantity.
Optionally, the device for self-cleaning of heat pump dryer further comprises a fifth trigger module; the fifth triggering module is configured to trigger the first drying system to be in a stop operation state and trigger the second electronic expansion valve to be in a closed state, and further comprises: determining whether the current date is a preset self-cleaning date; triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state, comprising the following steps: and under the condition that the current date is a preset self-cleaning date, triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state.
Optionally, the device for self-cleaning of a heat pump dryer further comprises a fifth triggering module; the fifth triggering module is configured to trigger the first drying system to be in a stop operation state and trigger the second electronic expansion valve to be in a closed state, and further includes: acquiring the operation time of the heat pump dryer; triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state, comprising the following steps: and under the condition that the running time of the heat pump dryer reaches a preset time threshold, triggering the first drying system to be in a running stop state and triggering the second electronic expansion valve to be in a closed state.
As shown in fig. 6, an embodiment of the present disclosure provides an apparatus for self-cleaning of a heat pump dryer, including a processor (processor) 600 and a memory (memory) 601. Optionally, the apparatus may also include a Communication Interface 602 and a bus 603. The processor 600, the communication interface 602, and the memory 601 may communicate with each other via a bus 603. The communication interface 602 may be used for information transfer. Processor 600 may invoke logic instructions in memory 601 to perform the method for heat pump dryer self-cleaning of the above-described embodiment.
In addition, the logic instructions in the memory 601 may be implemented in the form of software functional units and stored in a computer readable storage medium when the logic instructions are sold or used as a stand-alone product.
The memory 601 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 600 executes functional applications and data processing by executing program instructions/modules stored in the memory 601, namely, implements the method for self-cleaning of a heat pump dryer in the above-described embodiment.
The memory 601 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. In addition, the memory 601 may include a high speed random access memory, and may also include a non-volatile memory.
By adopting the device for self-cleaning of the heat pump dryer provided by the embodiment of the disclosure, the first drying system is triggered to be in a stop operation state, the second electronic expansion valve is triggered to be in a closed state, the second evaporator stops refrigerating, then the temperature of the coil of the dehumidifying evaporator is in a set temperature interval by adjusting the valve opening degree of the dehumidifying electronic expansion valve, the dehumidifying evaporator is refrigerated, the air temperature of the area near the dehumidifying evaporator is reduced, the surface of the dehumidifying evaporator is frosted, and the second compressor is triggered to stop operating after the temperature of the coil of the dehumidifying evaporator is in the set temperature interval for a preset duration, so that after the surface of the dehumidifying evaporator is frosted, the surface of the dehumidifying evaporator stops refrigerating and defrosting are carried out by stopping the second compressor, and therefore the dehumidifying part of the heat pump dryer, namely the dehumidifying evaporator, can be self-cleaned.
The embodiment of the disclosure provides a heat pump dryer, which comprises the device for self-cleaning of the heat pump dryer.
The heat pump dryer provided by the embodiment of the disclosure is adopted, and the first drying system is in a stop operation state and is triggered, the second electronic expansion valve is in a closed state, the second evaporator stops refrigerating, then the temperature of the coil of the dehumidifying evaporator is in a set temperature interval by adjusting the valve opening degree of the dehumidifying electronic expansion valve, the dehumidifying evaporator is refrigerated, the air temperature of the area near the dehumidifying evaporator is reduced, the surface of the dehumidifying evaporator is frosted, and the second compressor is triggered after the temperature of the coil of the dehumidifying evaporator is in the set temperature interval for a preset duration, so that the second compressor stops operating, the surface of the dehumidifying evaporator stops refrigerating and defrosting are performed by stopping the second compressor after the surface of the dehumidifying evaporator is frosted, and therefore the dehumidifying part of the heat pump dryer, namely the dehumidifying evaporator can be automatically cleaned.
Embodiments of the present disclosure provide a storage medium storing computer-executable instructions configured to perform the above-described method for heat pump dryer self-cleaning.
Embodiments of the present disclosure provide a computer program product comprising a computer program stored on a computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to perform the above-described method for heat pump dryer self-cleaning.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, which is stored in a storage medium and includes one or more instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising a" \8230; "does not exclude the presence of additional like elements in a process, method or apparatus comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and simplicity of description, the specific working processes of the above-described systems, apparatuses, and units may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than disclosed in the description, and sometimes there is no specific order between different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (9)
1. A method for self-cleaning of a heat pump dryer, the heat pump dryer comprising a first drying system and a second drying system; the first drying system and the second drying system are both used for controlled heating, and the second drying system comprises a first refrigerant loop formed by a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system is characterized by further comprising a dehumidification evaporator and a dehumidification electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of a drying room in a controlled manner, and the dehumidification electronic expansion valve is used for controlling and adjusting the refrigerant flow of the dehumidification evaporator; the method comprises the following steps:
triggering the first drying system to be in a stop running state, and triggering the second electronic expansion valve to be in a closed state;
adjusting the valve opening degree of the dehumidification electronic expansion valve to enable the dehumidification evaporator to refrigerate and enable the temperature of a coil pipe of the dehumidification evaporator to be within a set temperature range;
triggering the second compressor to stop running after the temperature of the coil of the dehumidification evaporator is in a set temperature interval for a preset time;
the heat pump dryer also comprises a condenser side fan and a dehumidification evaporator side fan; the condenser side fan is used for blowing air at the second condenser side to the drying room, and the dehumidification evaporator side fan is used for blowing air to the dehumidification evaporator; when adjusting dehumidification electronic expansion valve's valve opening degree, still include: and triggering the condenser side fan to operate at the highest wind speed, and triggering the dehumidification evaporator side fan to operate at the lowest wind speed.
2. The method of claim 1, the heat pump dryer further comprising a fresh air valve and an exhaust air valve; its characterized in that, the adjustment when dehumidification electronic expansion valve's valve opening degree still includes:
and triggering the fresh air valve and the exhaust valve to be in an opening state.
3. The method of claim 1, after triggering the second compressor to stop operating, further comprising:
and triggering the dehumidification evaporator side fan to operate at the maximum air quantity.
4. The method of any one of claims 1 to 3, wherein before triggering the first drying system to stop operation and triggering the second electronic expansion valve to close, further comprising:
determining whether the current date is a preset self-cleaning date;
the triggering the first drying system to be in a stop operation state and the triggering the second electronic expansion valve to be in a closed state includes: and under the condition that the current date is a preset self-cleaning date, triggering the first drying system to be in a stop operation state and triggering the second electronic expansion valve to be in a closed state.
5. The method of any one of claims 1 to 3, wherein before triggering the first drying system to stop operation and triggering the second electronic expansion valve to close, further comprising:
acquiring the running time of the heat pump dryer;
the triggering the first drying system to be in a stop operation state and the triggering the second electronic expansion valve to be in a closed state includes: and under the condition that the running time of the heat pump dryer reaches a preset time threshold, triggering the first drying system to be in a running stop state and triggering the second electronic expansion valve to be in a closed state.
6. An apparatus for self-cleaning of a heat pump dryer, the heat pump dryer comprising a first drying system and a second drying system; the first drying system and the second drying system are both used for controlled heating, and the second drying system comprises a first refrigerant loop formed by a second evaporator, a second compressor, a second condenser and a second electronic expansion valve; the second drying system is characterized by further comprising a dehumidifying evaporator and a dehumidifying electronic expansion valve; the second compressor, the second condenser, the dehumidification evaporator and the dehumidification electronic expansion valve form a second refrigerant loop; the dehumidification evaporator is used for dehumidifying return air of a drying room in a controlled manner, and the dehumidification electronic expansion valve is used for controlling and adjusting the refrigerant flow of the dehumidification evaporator; the device comprises:
the first triggering module is configured to trigger the first drying system to be in a stop operation state and trigger the second electronic expansion valve to be in a closed state;
the adjusting module is configured to adjust the valve opening degree of the dehumidification electronic expansion valve to enable the temperature of a coil of the dehumidification evaporator to be in a set temperature interval;
the second triggering module is configured to trigger the second compressor to stop running after the temperature of the coil of the dehumidification evaporator is in a set temperature interval for a preset time;
the heat pump dryer also comprises a condenser side fan and a dehumidification evaporator side fan; the condenser side fan is used for blowing air on the second condenser side to a drying room, and the dehumidification evaporator side fan is used for blowing air to the dehumidification evaporator; the device for self-cleaning of the heat pump dryer further comprises: the third triggering module is configured to trigger the condenser side fan to operate at the highest wind speed, and trigger the dehumidification evaporator side fan to operate at the lowest wind speed.
7. An apparatus for self-cleaning of heat pump dryer, comprising a processor and a memory storing program instructions, for application to a heat pump dryer, wherein the processor is configured to perform the method for self-cleaning of heat pump dryer as claimed in any one of claims 1 to 5 when running the program instructions.
8. A heat pump dryer characterized by comprising the device for heat pump dryer self-cleaning as claimed in claim 7.
9. A storage medium storing program instructions, characterized in that said program instructions, when executed, perform a method for heat pump dryer self-cleaning as claimed in any one of claims 1 to 5.
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| CN114440569B (en) * | 2022-02-11 | 2023-02-17 | 珠海格力电器股份有限公司 | Control method and system of heat pump drying equipment, storage medium and equipment |
| CN117606093A (en) * | 2022-05-25 | 2024-02-27 | 青岛海信日立空调系统有限公司 | Central air conditioner |
| CN115523742B (en) * | 2022-08-09 | 2024-03-19 | 青岛海尔空调器有限总公司 | Dehumidification control method and device of heat pump dryer and heat pump dryer |
| CN115317634B (en) * | 2022-08-15 | 2024-02-27 | 浙江吉利控股集团有限公司 | Automobile air conditioner sterilization system and method |
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| JP3028473U (en) * | 1996-02-27 | 1996-09-03 | 廉正 赤澤 | Auxiliary equipment structure for vehicle air conditioners |
| JP2006038362A (en) * | 2004-07-28 | 2006-02-09 | Daikin Ind Ltd | Freezing device |
| KR101224287B1 (en) * | 2010-12-28 | 2013-01-21 | 이대진 | A domestic animal urinate evaporator system |
| RU2510479C1 (en) * | 2012-09-25 | 2014-03-27 | Федеральное государственное бюджетное образовательное учреждение высшего профессионального образования "Воронежский государственный университет инженерных технологий" (ФГБОУ ВПО "ВГУИТ") | Control method of grain drying and storage processes |
| CN106247846B (en) * | 2016-08-23 | 2019-01-08 | 广东美的制冷设备有限公司 | The evaporator cleaning method and device of single cooler |
| CN107525220B (en) * | 2017-07-31 | 2020-11-27 | 青岛海尔空调器有限总公司 | Air conditioner and outdoor unit self-cleaning control method thereof |
| CN208901667U (en) * | 2018-09-20 | 2019-05-24 | 广州速潽捷环境科技有限公司 | A kind of combined heat pump dehumidification system with heat extraction heat absorption defrost coupling function |
| CN109237925B (en) * | 2018-10-29 | 2020-08-28 | 江苏天舒电器有限公司 | Heat pump control system for dehumidification and drying |
| CN109373504B (en) * | 2018-11-22 | 2020-01-17 | 珠海格力电器股份有限公司 | Evaporator self-cleaning method for increasing frost layer thickness and air conditioner |
| CN110131804A (en) * | 2019-06-17 | 2019-08-16 | 广东石油化工学院 | A kind of double refrigeration system cooling and dehumidifying units |
| CN110500701A (en) * | 2019-08-23 | 2019-11-26 | 珠海格力电器股份有限公司 | A kind of self cleaning method, device, storage medium and air-conditioning |
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