CN114992765A - Air conditioning system and self-cleaning control method thereof - Google Patents
Air conditioning system and self-cleaning control method thereof Download PDFInfo
- Publication number
- CN114992765A CN114992765A CN202210495332.6A CN202210495332A CN114992765A CN 114992765 A CN114992765 A CN 114992765A CN 202210495332 A CN202210495332 A CN 202210495332A CN 114992765 A CN114992765 A CN 114992765A
- Authority
- CN
- China
- Prior art keywords
- heat exchanger
- outdoor heat
- self
- cleaning
- outdoor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000004140 cleaning Methods 0.000 title claims abstract description 95
- 238000004378 air conditioning Methods 0.000 title claims abstract description 70
- 238000000034 method Methods 0.000 title claims abstract description 55
- 238000004891 communication Methods 0.000 claims abstract description 28
- 239000003507 refrigerant Substances 0.000 claims abstract description 21
- 230000001276 controlling effect Effects 0.000 claims description 48
- 238000005057 refrigeration Methods 0.000 claims description 18
- 238000001816 cooling Methods 0.000 claims description 13
- 230000000875 corresponding effect Effects 0.000 claims description 9
- 230000002596 correlated effect Effects 0.000 claims description 7
- 230000000694 effects Effects 0.000 abstract description 14
- 239000007788 liquid Substances 0.000 description 5
- 239000000428 dust Substances 0.000 description 2
- 230000001954 sterilising effect Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/90—Cleaning of purification apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention relates to the technical field of air conditioners, and particularly provides an air conditioning system and a self-cleaning control method thereof, aiming at solving the problem that the self-cleaning effect of an outdoor heat exchanger of the existing air conditioning system is poor. Therefore, the air conditioning system comprises a refrigerant circulation loop, and a compressor, an indoor heat exchanger, an indoor electronic expansion valve, a first outdoor heat exchange branch, a second outdoor heat exchange branch and a plurality of control valves which are arranged on the refrigerant circulation loop, wherein the first outdoor heat exchange branch is provided with the first outdoor heat exchanger and the first outdoor electronic expansion valve; the air conditioning system of the invention enables the outdoor heat exchanger to be self-cleaned by controlling the communication state of the control valves, and controls the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned, so as to further improve the cleaning effect.
Description
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides an air conditioning system and a self-cleaning control method thereof.
Background
With the development of economic level, people have higher and higher requirements on the comfort level of the air conditioner, and especially, people pay more attention to the problem that the air conditioner is easy to cause air conditioner diseases after long-term air blowing. The dust on the surface of the regularly cleaned heat exchanger can not only ensure the heat exchange effect of the air conditioner, but also effectively ensure the air supply quality of the indoor unit of the air conditioner, thereby effectively ensuring the health of a user. However, the self-cleaning mode of the existing air conditioning system is usually to remove dust on the surface of the outdoor heat exchanger after heating and defrosting, and the outdoor heat exchanger cannot be cleaned and sterilized when the air conditioning system is in operation of a refrigeration main body, and untimely cleaning and sterilization not only affects the heat exchange effect of the air conditioning system, but also threatens the health of users.
Accordingly, there is a need in the art for a new air conditioning system and a self-cleaning control method thereof to solve the above problems.
Disclosure of Invention
The invention aims to solve the technical problem, namely, the problem that the self-cleaning effect of an outdoor heat exchanger of the existing air-conditioning system is poor is solved.
In a first aspect, the present invention provides a self-cleaning control method for an air conditioning system, where the air conditioning system includes a refrigerant circulation loop, and a compressor, an indoor heat exchanger, an indoor electronic expansion valve, a first outdoor heat exchange branch, a second outdoor heat exchange branch, and multiple control valves that are arranged on the refrigerant circulation loop, where the first outdoor heat exchange branch is provided with the first outdoor heat exchanger and the first outdoor electronic expansion valve, the second outdoor heat exchange branch is provided with the second outdoor heat exchanger and the second outdoor electronic expansion valve, and the multiple control valves are arranged to change a refrigerant flow path;
the self-cleaning control method comprises the following steps:
when the air conditioning system is in the operation of a refrigeration main body and the outdoor heat exchanger needs self-cleaning, controlling the communication state of the control valves so that the outdoor heat exchanger needing self-cleaning serves as an evaporator and the other outdoor heat exchanger serves as a condenser;
and controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned.
In a preferred embodiment of the above self-cleaning control method, the step of "when the air conditioning system is in operation in a refrigeration main body and the outdoor heat exchanger needs self-cleaning, controlling the communication states of the control valves so that the outdoor heat exchanger needing self-cleaning is used as an evaporator and the other outdoor heat exchanger is used as a condenser" specifically includes:
when the air conditioning system is in a refrigeration main body operation and the first outdoor heat exchanger needs self-cleaning, controlling the communication state of the plurality of control valves so that the first outdoor heat exchanger is used as an evaporator and the second outdoor heat exchanger is used as a condenser;
the step of controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned specifically comprises the following steps:
and controlling the opening degree of the first outdoor electronic expansion valve according to the difference value between the outlet temperature and the inlet temperature of the first outdoor heat exchanger.
In a preferred embodiment of the above self-cleaning control method, the step of controlling the opening degree of the first outdoor electronic expansion valve according to a difference between an outlet temperature and an inlet temperature of the first outdoor heat exchanger specifically includes:
the difference value of the outlet temperature and the inlet temperature of the first outdoor heat exchanger is positively correlated with the opening degree of the first outdoor electronic expansion valve.
In a preferred technical solution of the above self-cleaning control method, when the air conditioning system is in operation in a refrigeration main body and the first outdoor heat exchanger needs to be self-cleaned, the control method further includes:
and controlling the second outdoor electronic expansion valve to operate at the maximum opening degree.
In a preferred technical solution of the above self-cleaning control method, when the air conditioning system is in operation in a refrigeration main body and the first outdoor heat exchanger needs to be self-cleaned, the control method further includes:
and controlling the opening degree of the indoor electronic expansion valve according to the superheat degree of the indoor heat exchanger.
In a preferred embodiment of the above self-cleaning control method, the step of controlling the communication states of the control valves so that the outdoor heat exchanger to be self-cleaned serves as an evaporator and the other outdoor heat exchanger serves as a condenser when the air conditioning system is in operation in a cooling main body and the outdoor heat exchanger needs to be self-cleaned specifically includes:
when the air conditioning system is in a refrigeration main body operation state and the second outdoor heat exchanger needs self-cleaning, controlling the communication states of the plurality of control valves so that the second outdoor heat exchanger is used as an evaporator and the first outdoor heat exchanger is used as a condenser;
the step of controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned specifically comprises the following steps:
and controlling the opening degree of the second outdoor electronic expansion valve according to the difference value between the outlet temperature and the inlet temperature of the second outdoor heat exchanger.
In a preferred embodiment of the above self-cleaning control method, the step of controlling the opening degree of the second outdoor electronic expansion valve according to a difference between an outlet temperature and an inlet temperature of the second outdoor heat exchanger includes:
the difference value of the outlet temperature and the inlet temperature of the second outdoor heat exchanger is positively correlated with the opening degree of the second outdoor electronic expansion valve.
In a preferred technical solution of the above self-cleaning control method, when the air conditioning system is in operation in a refrigeration main body and the second outdoor heat exchanger needs to be self-cleaned, the control method further includes:
and controlling the first outdoor electronic expansion valve to operate at the maximum opening degree.
In a preferred technical solution of the above self-cleaning control method, when the air conditioning system is in operation in a refrigeration main body and the second outdoor heat exchanger needs to be self-cleaned, the control method further includes:
and controlling the opening degree of the indoor electronic expansion valve according to the superheat degree of the indoor heat exchanger.
In another aspect, the present invention further provides an air conditioning system comprising a controller configured to perform the self-cleaning control method described in any of the above preferred embodiments.
Under the condition of adopting the technical scheme, the air conditioning system disclosed by the invention realizes the purposes of effectively cleaning and sterilizing the outdoor heat exchanger when the air conditioning system is in operation of a refrigeration main body by controlling the communication state of the control valves so that the outdoor heat exchanger needing self-cleaning is used as an evaporator and the other outdoor heat exchanger is used as a condenser, and controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger needing self-cleaning, thereby effectively ensuring the heat exchange effect and the air supply quality of the air conditioning system.
Drawings
Preferred embodiments of the present invention are described below in conjunction with the appended drawings, wherein:
fig. 1 is a schematic view of the overall structure of an air conditioning system of the present invention;
FIG. 2 is a flow chart of the main steps of the self-cleaning control method of the present invention;
FIG. 3 is a flowchart illustrating the detailed steps of a first preferred embodiment of the self-cleaning control method of the present invention;
FIG. 4 is a flowchart illustrating the detailed steps of a second preferred embodiment of the self-cleaning control method of the present invention;
reference numerals:
1. a refrigerant circulation circuit;
2. a compressor;
3. an indoor heat exchanger;
4. an indoor electronic expansion valve;
5. a first outdoor heat exchange branch; 51. a first outdoor heat exchanger; 52. a first outdoor electronic expansion valve;
6. a second outdoor heat exchange branch; 61. a second outdoor heat exchanger; 62. a second outdoor electronic expansion valve;
7. a control valve; 71. a first four-way valve; 72. a second four-way valve; 73. a third four-way valve;
8. a plate heat exchanger;
9. a gas-liquid separator;
10. and connecting the branch.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. For example, the present invention does not set any limit to the specific application object of the self-cleaning control method, the self-cleaning control method may be used in a wall-mounted air conditioning system, a ceiling air conditioning system, or a cabinet air conditioning system, which are not restrictive, and technicians may set the application object of the self-cleaning control method according to actual needs. Such changes in the application object do not depart from the basic principle of the present invention and belong to the protection scope of the present invention.
It should be noted that in the description of the preferred embodiment, the terms of direction or positional relationship indicated by the terms "inside", "outside", and the like are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.
In addition, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" are to be construed broadly and may include, for example, direct connection, indirect connection through an intermediary, and communication between two elements. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Although the steps of the control method of the present invention are described herein in a particular order, the order is not limiting and those skilled in the art can perform the steps in a different order without departing from the basic principles of the invention.
Referring first to fig. 1, fig. 1 is a schematic view of an overall structure of an air conditioning system according to the present invention. As shown in fig. 1, the air conditioning system of the present invention includes a refrigerant circulation loop 1, and a compressor 2, an indoor heat exchanger 3, an indoor electronic expansion valve 4, a first outdoor heat exchange branch 5, a second outdoor heat exchange branch 6, and three control valves 7 which are disposed on the refrigerant circulation loop 1, wherein the first outdoor heat exchange branch 5 is provided with a first outdoor heat exchanger 51 and a first outdoor electronic expansion valve 52, the first outdoor electronic expansion valve 52 can control a communication state of the first outdoor heat exchange branch 5, the second outdoor heat exchange branch 6 is provided with a second outdoor heat exchanger 61 and a second outdoor electronic expansion valve 62, the second outdoor electronic expansion valve 62 can control a communication state of the second outdoor heat exchange branch 6, and the three control valves 7 are disposed to change a refrigerant flow path. Of course, it should be noted that the specific number of the outdoor heat exchange branches is not limited, and those skilled in the art can set the number according to actual use requirements.
In addition, it should be noted that, the present invention does not limit the specific structures of the compressor 2, the indoor heat exchanger 3, the first outdoor heat exchanger 51 and the second outdoor heat exchanger 61, and the compressor 2 may be a fixed-frequency compressor or an inverter compressor; the indoor heat exchanger 3, the first outdoor heat exchanger 51, and the second outdoor heat exchanger 61 may be plate type heat exchangers or may be shell and tube type heat exchangers, which are not restrictive. In addition, the present invention does not limit the specific types of the indoor electronic expansion valves 4, the first outdoor electronic expansion valves 52, the second outdoor electronic expansion valves 62, and the control valves 7, and the specific number and specific arrangement manner of the control valves 7, as long as one of the first outdoor heat exchanger 51 and the second outdoor heat exchanger 61 can be used as an evaporator and the other as a condenser by controlling the communication states or opening degrees of the first outdoor electronic expansion valve 52, the second outdoor electronic expansion valve 62, and the control valve 7, thereby alternately cleaning the first outdoor heat exchanger 51 and the second outdoor heat exchanger 61, which can be set by a person skilled in the art. Preferably, the number of the control valves 7 is three, and the first four-way valve 71, the second four-way valve 72, and the third four-way valve 73 are provided.
Further, the refrigerant circulation circuit 1 is further provided with a plate heat exchanger 8 and a gas-liquid separator 9, the plate heat exchanger 8 is disposed between the outdoor electronic expansion valve and the indoor electronic expansion valve 4, and the gas-liquid separator 9 is connected to the first four-way valve 71, the second four-way valve 72, and the third four-way valve 73. The air conditioning system further comprises a connecting branch 10, the connecting branch 10 is connected with the refrigerant circulation loop 1, one end of the connecting branch 10 is connected to the plate type heat exchanger 8, and the other end of the connecting branch 10 is connected between the gas-liquid separator 9 and the control valve 7.
It should be noted that the present invention does not set any limit to the specific structure of the plate heat exchanger 8 and the gas-liquid separator 9, nor to the specific structure of the air conditioning system, and those skilled in the art can set the structure according to the actual situation.
Further, the air conditioning system further includes a plurality of temperature sensors capable of detecting outlet and inlet temperatures of the first and second outdoor heat exchangers 51 and 61, respectively, and a controller capable of acquiring detection data of the plurality of temperature sensors, and also capable of controlling an operation state of the air conditioning system, for example, controlling a communication state of the control valve 7, controlling opening degrees of the first and second outdoor electronic expansion valves 52 and 62, and the like. It should be noted that, the invention does not limit the specific setting position, model and number of the temperature sensors, and the technicians in this field can set the setting according to the actual situation; in addition, the present invention does not set any limit to the specific structure and model of the controller, the controller may be the original controller of the air conditioning system, or may be a controller separately set for executing the self-cleaning control method of the present invention, and a person skilled in the art may set the structure and model of the controller according to the actual use requirement.
Referring next to fig. 2, a flow chart of the main steps of the self-cleaning control method of the present invention is shown. As shown in fig. 2, based on the air conditioning system described in the above embodiment, the self-cleaning control method of the present invention mainly includes the following steps:
s1: when the air conditioning system is in the operation of a refrigeration main body and the outdoor heat exchanger needs self-cleaning, controlling the communication state of the control valves so that the outdoor heat exchanger needing self-cleaning is used as an evaporator and the other outdoor heat exchanger is used as a condenser;
s2: and controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned.
First, in step S1, when the air conditioning system is in a cooling main body operation and the outdoor heat exchanger needs self-cleaning, the controller controls the communication state of the plurality of control valves 7 so that the outdoor heat exchanger that needs self-cleaning functions as an evaporator and the other outdoor heat exchanger functions as a condenser, so that the outdoor heat exchanger of the present invention can achieve self-cleaning.
It should be noted that, the present invention does not limit the specific operation state of the air conditioning system when the air conditioning system is in the refrigeration main body, and the person skilled in the art can set the operation state at will. In addition, it should be noted that, the present invention does not limit the specific determination method of whether the outdoor heat exchanger needs to be cleaned, and the determination may be performed according to the indoor air supply quality, or according to the operation duration or the heat exchange effect of the air conditioning system, which is not restrictive.
In addition, it should be noted that, the present invention does not limit the specific control manner of the plurality of control valves 7 by the controller, as long as the communication state of the control valves 7 can be controlled, so that the outdoor heat exchanger that needs to be self-cleaned is used as an evaporator and another outdoor heat exchanger is used as a condenser, thereby realizing self-cleaning of the outdoor heat exchanger, and a person skilled in the art can set the control manner according to actual situations.
Next, in step S2, the controller controls the opening degree of its corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger that needs self-cleaning and is obtained by the temperature sensor, so as to further improve the cleaning effect of the outdoor heat exchanger.
It should be noted that, the invention does not limit the specific obtaining mode and the specific obtaining time of the outlet temperature and the inlet temperature of the outdoor heat exchanger, and the temperature can be obtained in real time or at certain time intervals; the self-cleaning time of the outdoor heat exchanger is not limited, and the self-cleaning time can be acquired when the outdoor heat exchanger starts to self-clean, and the self-cleaning time can be acquired at any time in the self-cleaning process of the outdoor heat exchanger, and the self-cleaning time can be set by a person skilled in the art according to the actual situation.
In addition, it should be noted that, the present invention does not limit the specific opening degree of the outdoor electronic expansion valve at all, and those skilled in the art can set the opening degree according to the actual cleaning condition of the outdoor heat exchanger.
First preferred embodiment
Referring next to fig. 3, a flowchart of the detailed steps of the first preferred embodiment of the self-cleaning control method of the present invention is shown. As shown in fig. 3, based on the air conditioning system described in the above preferred embodiment, the first preferred embodiment of the self-cleaning control method of the present invention specifically includes the following steps:
s101: when the air conditioning system is in the operation of the refrigeration main body and the first outdoor heat exchanger needs self-cleaning, controlling the communication states of the plurality of control valves so that the first outdoor heat exchanger is used as an evaporator and the second outdoor heat exchanger is used as a condenser;
s102: the difference value of the outlet temperature and the inlet temperature of the first outdoor heat exchanger is positively correlated with the opening degree of the first outdoor electronic expansion valve;
s103: controlling the second outdoor electronic expansion valve to operate at the maximum opening degree;
s104: and controlling the opening of the indoor electronic expansion valve according to the superheat degree of the indoor heat exchanger.
First, in step S101, when the air conditioning system is in a cooling main operation and the first outdoor heat exchanger 51 needs to be self-cleaned, the controller controls the communication states of the plurality of control valves 7 so that the first outdoor heat exchanger 51 functions as an evaporator and the second outdoor heat exchanger 61 functions as a condenser, thereby cleaning the first outdoor heat exchanger 51.
It should be noted that, the present invention does not limit the specific operation state of the air conditioning system when the air conditioning system is in the refrigeration main body, and the person skilled in the art can set the operation state at will. In addition, it should be noted that the present invention does not limit the specific determination method of whether the first outdoor heat exchanger 51 needs to be cleaned, and the determination method may be performed according to the indoor air supply quality, or according to the operation duration or the heat exchange effect of the air conditioning system, which is not restrictive.
It should be noted that the present invention does not limit the specific control manner of the plurality of control valves 7 by the controller, as long as the first outdoor heat exchanger 51 that needs to be self-cleaned is used as an evaporator and the second outdoor heat exchanger 61 is used as a condenser by controlling the communication state of the control valves 7, so as to realize self-cleaning of the first outdoor heat exchanger 51, and a person skilled in the art can set the control manner according to actual situations.
In the present embodiment, when it is required to clean the first outdoor heat exchanger 51, the controller controls the first four-way valve 71 to be in the energized state, and the second and third four- way valves 72 and 73 to be in the de-energized state. Based on the communication state, the high-pressure refrigerant flowing out of the compressor 2 firstly enters the second outdoor heat exchanger 61 through the second four-way valve 72, and is divided after passing through the second outdoor electronic expansion valve 62, wherein a part of the refrigerant enters the indoor heat exchanger 3 through the plate heat exchanger 8 and the indoor electronic expansion valve 4, and the other part of the refrigerant enters the first outdoor heat exchanger 51 through the first outdoor electronic expansion valve 52, so that the first outdoor heat exchanger 51 is used as an evaporator, and further the cleaning function of the first outdoor heat exchanger 51 is realized.
Further, the controller obtains the outlet temperature and the inlet temperature of the first outdoor heat exchanger 51 detected by the temperature sensor, and controls the opening degree of the first outdoor electronic expansion valve 52 according to the outlet temperature and the inlet temperature of the first outdoor heat exchanger 51, so as to further improve the cleaning effect of the first outdoor heat exchanger 51.
It should be noted that the present invention does not limit the specific control manner of the opening degree of the first outdoor electronic expansion valve 52, for example, the controller may compare the outlet temperature and the inlet temperature of the first outdoor heat exchanger 51 with the preset outlet temperature and the preset inlet temperature, and then control the opening degree of the first outdoor electronic expansion valve 52 according to the comparison result, which is not restrictive, and the skilled person may set the opening degree according to the actual situation.
Preferably, in step S102, the controller controls the opening degree of the first outdoor electronic expansion valve 52 according to the magnitude of the difference between the outlet temperature and the inlet temperature of the first outdoor heat exchanger 51, specifically, the magnitude of the difference between the outlet temperature and the inlet temperature of the first outdoor heat exchanger 51 is positively correlated to the magnitude of the opening degree of the first outdoor electronic expansion valve 52.
It should be noted that the present invention does not limit the specific adjustment range of the opening degree of the first outdoor electronic expansion valve 52, and those skilled in the art can set the adjustment range according to the actual cleaning condition of the first outdoor heat exchanger 51.
Further, in step S103, the controller controls the second outdoor electronic expansion valve 62 to operate at the maximum opening degree, so as to further ensure the cleaning effect of the first outdoor heat exchanger 51.
Further preferably, in step S104, the controller further controls the opening degree of the indoor electronic expansion valve 4 according to the superheat degree of the indoor heat exchanger 3, so as to effectively ensure the heat exchange requirement of the user when the air conditioning system is in the cooling main body operation state.
It should be noted that the present invention does not limit the manner of obtaining the superheat of the indoor heat exchanger 3 and the adjustment range of the opening degree of the indoor electronic expansion valve 4, and those skilled in the art can set the superheat according to actual conditions.
In addition, it should be noted that, the present invention also does not set any limitation to the specific execution order of step S102, step S103, and step S104, and it may be executed simultaneously or sequentially without being divided into sequences, which is not limiting, and those skilled in the art can set the execution order according to the actual situation.
Second preferred embodiment
Referring next to fig. 4, a flowchart illustrating specific steps of a second preferred embodiment of the self-cleaning control method of the present invention is shown. As shown in fig. 4, based on the air conditioning system described in the above preferred embodiment, the second preferred embodiment of the self-cleaning control method of the present invention specifically includes the following steps:
s201: when the air conditioning system is in the operation of the refrigeration main body and the second outdoor heat exchanger needs self-cleaning, controlling the communication state of the plurality of control valves so that the second outdoor heat exchanger is used as an evaporator and the first outdoor heat exchanger is used as a condenser;
s202: the difference value of the outlet temperature and the inlet temperature of the second outdoor heat exchanger is positively correlated with the opening degree of the second outdoor electronic expansion valve;
s203: controlling the first outdoor electronic expansion valve to operate at the maximum opening degree;
s204: and controlling the opening of the indoor electronic expansion valve according to the superheat degree of the indoor heat exchanger.
First, in step S201, when the air conditioning system is in a cooling main operation and the second outdoor heat exchanger 61 needs to be self-cleaned, the controller controls the communication states of the plurality of control valves 7 so that the second outdoor heat exchanger 61 functions as an evaporator and the first outdoor heat exchanger 51 functions as a condenser, thereby cleaning the second outdoor heat exchanger 61.
It should be noted that the present invention does not limit the specific operation state of the air conditioning system when the air conditioning system is in the cooling main body, and the person skilled in the art can set the operation state by himself or herself. In addition, it should be noted that, the present invention does not limit the specific determination method of whether the second outdoor heat exchanger 61 needs to be cleaned, and the determination method may be performed according to the indoor air supply quality, or according to the operation time length or the heat exchange effect of the air conditioning system, which is not restrictive.
It should be noted that the present invention does not limit the specific control manner of the plurality of control valves 7 by the controller, as long as the second outdoor heat exchanger 61 that needs to be self-cleaned is used as an evaporator and the first outdoor heat exchanger 51 is used as a condenser by controlling the communication state of the control valves 7, so as to realize self-cleaning of the second outdoor heat exchanger 61, and a person skilled in the art can set the control manner according to actual situations.
In the present embodiment, when it is necessary to clean the second outdoor heat exchanger 61, the controller controls the second four-way valve 72 to be in the energized state, and the first four-way valve 71 and the third four-way valve 73 to be in the de-energized state. Based on the communication state, the high-pressure refrigerant flowing out of the compressor 2 firstly enters the first outdoor heat exchanger 51 through the first four-way valve 71 and is split after flowing through the first outdoor electronic expansion valve 52, wherein a part of the refrigerant enters the indoor heat exchanger 3 through the plate heat exchanger 8 and the indoor electronic expansion valve 4, and the other part of the refrigerant enters the second outdoor heat exchanger 61 through the second outdoor electronic expansion valve 62, so that the second outdoor heat exchanger 61 is used as an evaporator, and further the cleaning function of the refrigerant is realized.
Further, the controller obtains the outlet temperature and the inlet temperature of the second outdoor heat exchanger 61 detected by the temperature sensor, and controls the opening degree of the second outdoor electronic expansion valve 62 according to the outlet temperature and the inlet temperature of the second outdoor heat exchanger 61, so as to further improve the cleaning effect of the second outdoor heat exchanger 61.
It should be noted that the present invention does not limit the specific control manner of the opening degree of the second outdoor electronic expansion valve 62, for example, the controller may compare the outlet temperature and the inlet temperature of the second outdoor heat exchanger 61 with the preset outlet temperature and the preset inlet temperature, and then control the opening degree of the second outdoor electronic expansion valve 62 according to the comparison result, which is not restrictive, and the skilled person may set the opening degree according to the actual situation.
Preferably, in step S202, the controller controls the opening degree of the second outdoor electronic expansion valve 62 according to the magnitude of the difference between the outlet temperature and the inlet temperature of the second outdoor heat exchanger 61, specifically, the magnitude of the difference between the outlet temperature and the inlet temperature of the second outdoor heat exchanger 61 is in positive correlation with the magnitude of the opening degree of the second outdoor electronic expansion valve 62.
It should be noted that the present invention does not limit the specific adjustment range of the opening degree of the second outdoor electronic expansion valve 62, and those skilled in the art can set the adjustment range according to the actual cleaning condition of the second outdoor heat exchanger 61.
Further, in step S203, the controller controls the first outdoor electronic expansion valve 52 to operate at the maximum opening degree to further ensure the cleaning effect of the second outdoor heat exchanger 61.
Further preferably, in step S204, the controller further controls the opening degree of the indoor electronic expansion valve 4 according to the superheat degree of the indoor heat exchanger 3, so as to effectively ensure the heat exchange requirement of the user when the air conditioning system is in the cooling main operation state.
It should be noted that the present invention does not limit the manner of obtaining the superheat of the indoor heat exchanger 3 and the adjustment range of the opening degree of the indoor electronic expansion valve 4, and those skilled in the art can set the superheat according to actual conditions.
In addition, it should be noted that, the present invention also does not set any limitation to the specific execution order of step S202, step S203, and step S204, and the execution order may be executed simultaneously or sequentially without any order, which is not limiting, and the person skilled in the art may set the execution order according to the actual situation.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is apparent to those skilled in the art that the scope of the present invention is not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (10)
1. The self-cleaning control method for the air conditioning system is characterized in that the air conditioning system comprises a refrigerant circulation loop, and a compressor, an indoor heat exchanger, an indoor electronic expansion valve, a first outdoor heat exchange branch, a second outdoor heat exchange branch and a plurality of control valves which are arranged on the refrigerant circulation loop, wherein the first outdoor heat exchange branch is provided with the first outdoor heat exchanger and the first outdoor electronic expansion valve, the second outdoor heat exchange branch is provided with the second outdoor heat exchanger and the second outdoor electronic expansion valve, and the plurality of control valves are arranged to change the refrigerant circulation path;
the self-cleaning control method comprises the following steps:
when the air conditioning system is in the operation of a refrigeration main body and the outdoor heat exchanger needs self-cleaning, controlling the communication state of the control valves so that the outdoor heat exchanger needing self-cleaning serves as an evaporator and the other outdoor heat exchanger serves as a condenser;
and controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned.
2. The self-cleaning control method according to claim 1, wherein the step of controlling the communication states of the plurality of control valves so that the outdoor heat exchanger requiring self-cleaning functions as an evaporator and another outdoor heat exchanger functions as a condenser when the air conditioning system is in a cooling main body operation and the outdoor heat exchanger requires self-cleaning specifically comprises:
when the air conditioning system is in a refrigeration main body operation state and the first outdoor heat exchanger needs self-cleaning, controlling the communication states of the plurality of control valves so that the first outdoor heat exchanger is used as an evaporator and the second outdoor heat exchanger is used as a condenser;
the step of controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs to be self-cleaned specifically comprises the following steps:
and controlling the opening degree of the first outdoor electronic expansion valve according to the difference value between the outlet temperature and the inlet temperature of the first outdoor heat exchanger.
3. The self-cleaning control method of claim 2, wherein the step of controlling the opening degree of the first outdoor electronic expansion valve according to the difference between the outlet temperature and the inlet temperature of the first outdoor heat exchanger specifically comprises:
the difference value of the outlet temperature and the inlet temperature of the first outdoor heat exchanger is positively correlated with the opening degree of the first outdoor electronic expansion valve.
4. The self-cleaning control method of claim 2, wherein when the air conditioning system is in a cooling main body operation and the first outdoor heat exchanger needs to be self-cleaned, the control method further comprises:
and controlling the second outdoor electronic expansion valve to operate at the maximum opening degree.
5. The self-cleaning control method of claim 2, wherein when the air conditioning system is in a cooling main body operation and the first outdoor heat exchanger needs self-cleaning, the control method further comprises:
and controlling the opening degree of the indoor electronic expansion valve according to the superheat degree of the indoor heat exchanger.
6. The self-cleaning control method of claim 1, wherein the step of controlling the communication states of the plurality of control valves so that the outdoor heat exchanger requiring self-cleaning is used as the evaporator and another outdoor heat exchanger is used as the condenser when the air conditioning system is in a cooling main body operation and the outdoor heat exchanger requires self-cleaning specifically comprises:
when the air conditioning system is in a refrigeration main body operation state and the second outdoor heat exchanger needs self-cleaning, controlling the communication states of the plurality of control valves so that the second outdoor heat exchanger is used as an evaporator and the first outdoor heat exchanger is used as a condenser;
the step of controlling the opening degree of the corresponding outdoor electronic expansion valve according to the outlet temperature and the inlet temperature of the outdoor heat exchanger which needs self-cleaning specifically comprises the following steps:
and controlling the opening degree of the second outdoor electronic expansion valve according to the difference value between the outlet temperature and the inlet temperature of the second outdoor heat exchanger.
7. The self-cleaning control method of claim 6, wherein the step of controlling the opening degree of the second outdoor electronic expansion valve according to the difference between the outlet temperature and the inlet temperature of the second outdoor heat exchanger specifically comprises:
the difference value of the outlet temperature and the inlet temperature of the second outdoor heat exchanger is positively correlated with the opening degree of the second outdoor electronic expansion valve.
8. The self-cleaning control method of claim 6, wherein when the air conditioning system is in a cooling main body operation and the second outdoor heat exchanger needs self-cleaning, the control method further comprises:
and controlling the first outdoor electronic expansion valve to operate at the maximum opening degree.
9. The self-cleaning control method of claim 6, wherein when the air conditioning system is in a cooling main body operation and the second outdoor heat exchanger needs self-cleaning, the control method further comprises:
and controlling the opening degree of the indoor electronic expansion valve according to the superheat degree of the indoor heat exchanger.
10. An air conditioning system, characterized in that it comprises a controller configured to be able to perform the self-cleaning control method of any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210495332.6A CN114992765B (en) | 2022-05-07 | 2022-05-07 | Air conditioning system and self-cleaning control method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210495332.6A CN114992765B (en) | 2022-05-07 | 2022-05-07 | Air conditioning system and self-cleaning control method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114992765A true CN114992765A (en) | 2022-09-02 |
| CN114992765B CN114992765B (en) | 2024-02-20 |
Family
ID=83025722
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210495332.6A Active CN114992765B (en) | 2022-05-07 | 2022-05-07 | Air conditioning system and self-cleaning control method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114992765B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080043550A (en) * | 2006-11-14 | 2008-05-19 | 엘지전자 주식회사 | Air conditioner and control method of the same |
| WO2019024722A1 (en) * | 2017-07-31 | 2019-02-07 | 青岛海尔空调器有限总公司 | Air conditioner and self-cleaning control method for indoor unit thereof |
| CN110594961A (en) * | 2019-09-10 | 2019-12-20 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| CN210107620U (en) * | 2019-06-27 | 2020-02-21 | 薛尚秦 | Compensation type air conditioner heat exchange system |
| CN111426017A (en) * | 2020-05-12 | 2020-07-17 | 珠海格力电器股份有限公司 | Self-cleaning control method for outdoor heat exchanger of air conditioner, air conditioner and computer readable storage medium |
| JP2021124227A (en) * | 2020-02-03 | 2021-08-30 | 東芝ライフスタイル株式会社 | Outdoor unit of air conditioner and air conditioner |
| CN113551391A (en) * | 2020-04-14 | 2021-10-26 | 青岛海尔空调器有限总公司 | In-pipe self-cleaning control method of air conditioning system |
| KR20220029476A (en) * | 2020-09-01 | 2022-03-08 | 오텍캐리어 주식회사 | Air Conditioner with Evaporator Cleaning function |
-
2022
- 2022-05-07 CN CN202210495332.6A patent/CN114992765B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20080043550A (en) * | 2006-11-14 | 2008-05-19 | 엘지전자 주식회사 | Air conditioner and control method of the same |
| WO2019024722A1 (en) * | 2017-07-31 | 2019-02-07 | 青岛海尔空调器有限总公司 | Air conditioner and self-cleaning control method for indoor unit thereof |
| CN210107620U (en) * | 2019-06-27 | 2020-02-21 | 薛尚秦 | Compensation type air conditioner heat exchange system |
| CN110594961A (en) * | 2019-09-10 | 2019-12-20 | 青岛海尔空调器有限总公司 | Air conditioner control method and air conditioner |
| JP2021124227A (en) * | 2020-02-03 | 2021-08-30 | 東芝ライフスタイル株式会社 | Outdoor unit of air conditioner and air conditioner |
| CN113551391A (en) * | 2020-04-14 | 2021-10-26 | 青岛海尔空调器有限总公司 | In-pipe self-cleaning control method of air conditioning system |
| CN111426017A (en) * | 2020-05-12 | 2020-07-17 | 珠海格力电器股份有限公司 | Self-cleaning control method for outdoor heat exchanger of air conditioner, air conditioner and computer readable storage medium |
| KR20220029476A (en) * | 2020-09-01 | 2022-03-08 | 오텍캐리어 주식회사 | Air Conditioner with Evaporator Cleaning function |
Also Published As
| Publication number | Publication date |
|---|---|
| CN114992765B (en) | 2024-02-20 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10088211B2 (en) | Air-conditioning apparatus | |
| US11346570B2 (en) | Refrigerant leakage determination system and refrigeration cycle apparatus | |
| EP2863139B1 (en) | Air conditioning system | |
| US9410715B2 (en) | Air conditioning apparatus | |
| CN103411341A (en) | Constant-temperature dehumidifying air conditioner and dehumidifying method | |
| US20150276255A1 (en) | Air conditioning apparatus | |
| JP2012141113A (en) | Air conditioning/water heating device system | |
| CN111520890A (en) | Multi-split air conditioner and sterilization control method thereof | |
| CN113432264A (en) | Refrigerant circulation system, method for controlling air conditioner to dehumidify and air conditioner | |
| CN113432261A (en) | Refrigerant circulation system, method for controlling air conditioner to dehumidify and air conditioner | |
| US20210041128A1 (en) | Controller of air conditioning system, outdoor unit, relay unit, heat source apparatus, and air conditioning system | |
| CN114508837A (en) | Control method for three-pipe type multi-split air conditioning unit | |
| KR20040045095A (en) | Air-conditioner's noise reducing control method | |
| CN114992765B (en) | Air conditioning system and self-cleaning control method thereof | |
| CN114992800B (en) | Self-cleaning control method for shutdown stage of air conditioning system and air conditioning system | |
| CN113587249B (en) | Multi-split system | |
| CN111750490B (en) | Air conditioner and control method | |
| JP5535849B2 (en) | Air conditioner | |
| KR20100082521A (en) | Home appliance and controlling method for the same of | |
| CN112283895B (en) | Air conditioner and purifier self-starting noise control method | |
| CN114963442A (en) | Air conditioner and control method thereof | |
| JP6971400B2 (en) | Air conditioning system, air conditioning method, and program | |
| CN113915745A (en) | Air conditioner and control method of pre-sleep mode | |
| CN113623723B (en) | Air conditioning system and control method thereof | |
| US11965665B2 (en) | Air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |