CN114543259A - Air conditioner - Google Patents

Air conditioner Download PDF

Info

Publication number
CN114543259A
CN114543259A CN202210218830.6A CN202210218830A CN114543259A CN 114543259 A CN114543259 A CN 114543259A CN 202210218830 A CN202210218830 A CN 202210218830A CN 114543259 A CN114543259 A CN 114543259A
Authority
CN
China
Prior art keywords
controller
outdoor
indoor unit
value
set value
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
Application number
CN202210218830.6A
Other languages
Chinese (zh)
Other versions
CN114543259B (en
Inventor
王江南
夏兴祥
石磊
董辰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Original Assignee
Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao Hisense Hitachi Air Conditioning System Co Ltd filed Critical Qingdao Hisense Hitachi Air Conditioning System Co Ltd
Priority to CN202210218830.6A priority Critical patent/CN114543259B/en
Publication of CN114543259A publication Critical patent/CN114543259A/en
Application granted granted Critical
Publication of CN114543259B publication Critical patent/CN114543259B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/36—Responding to malfunctions or emergencies to leakage of heat-exchange fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
    • F24F11/63—Electronic processing
    • F24F11/64—Electronic processing using pre-stored data
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioning device, which comprises an outdoor unit, at least one indoor unit and a controller, wherein the outdoor unit comprises a first outdoor unit and a second outdoor unit; the indoor unit is connected with the outdoor unit; the outdoor unit comprises a compressor and an outdoor heat exchanger; the indoor unit comprises an indoor heat exchanger; the controller is provided with a refrigerant leakage detection mode, and when the controller is started, the outdoor unit is controlled to operate a refrigeration mode; and executing indoor unit superheat degree control, system high pressure control and evaporation temperature control; the controller is provided with a compressor operation set time and configured to determine whether the operation time of the compressor in the refrigerant leakage amount detection mode reaches the compressor operation set time; if yes, obtaining the supercooling degree of the outdoor heat exchanger, and calculating the refrigerant quantity of the system; the system refrigerant leakage amount is equal to the difference of the system refrigerant amounts of the two adjacent refrigerant leakage amount detection modes. The invention improves the precision of refrigerant quantity leakage detection, is convenient for troubleshooting system problems and improves the maintenance efficiency.

Description

Air conditioner
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner.
Background
In the operation process of the air conditioning system, leakage exists due to poor system sealing, and the refrigerant quantity in the system is abnormal due to long-term accumulation. When the refrigerant quantity in the air conditioning system is abnormal, the refrigerating and heating effects of the unit can be influenced, and even the operation reliability of the unit can be influenced when the refrigerant quantity is serious. Therefore, the leakage amount of the refrigerant can be accurately measured in the using process of the air conditioning system, the problems can be solved for after-sales personnel, great convenience is provided for system maintenance and the like, and the service level can be improved.
At present, the air conditioning system refrigerant leakage amount judgment application range of partial manufacturers in the industry is small, and the error is relatively large.
Disclosure of Invention
The invention provides an air conditioner, which can obtain the leakage amount of the system refrigerant by accurately calculating the difference value of the system refrigerant amount between the current point and the previous point under the set working condition, greatly improve the detection precision of the refrigerant leakage amount and improve the maintenance efficiency.
In some embodiments of the present application, an air conditioning apparatus includes an outdoor unit, at least one indoor unit, and a controller; the indoor unit is connected with the outdoor unit; the outdoor unit comprises a compressor and an outdoor heat exchanger; the indoor unit comprises an indoor heat exchanger; the controller is provided with a refrigerant leakage detection mode, and when the controller is started, the outdoor unit is controlled to operate a refrigeration mode; and executing indoor unit superheat degree control, system high pressure control and evaporation temperature control;
the controller is provided with a compressor operation set time and configured to determine whether the operation time of the compressor in the refrigerant leakage amount detection mode reaches the compressor operation set time; if yes, obtaining the supercooling degree of the outdoor heat exchanger, and calculating the refrigerant quantity of the system;
the system refrigerant leakage amount is equal to the difference of the system refrigerant amounts of the two adjacent refrigerant leakage amount detection modes.
The distribution state and the density of the refrigerant in the indoor unit are controlled to be a specific value by controlling the superheat degree of the indoor unit, controlling the high pressure of the system and controlling the evaporation temperature of the system, controlling the density of the refrigerant in the outdoor unit to be the specific value, wherein the refrigerant quantity in the system is only related to the supercooling degree of the outdoor heat exchanger, the refrigerant quantity of the system at a certain moment can be accurately calculated by the supercooling degree of the system, and then the refrigerant leakage quantity is obtained by calculating the refrigerant quantity difference value between the moment and the last moment without adopting correction parameters for correction, so that the influence of uncontrollable factors such as different indoor and outdoor unit connection combinations and different indoor and outdoor environment temperature changes on the refrigerant quantity leakage detection is avoided, and the refrigerant quantity leakage detection precision is greatly improved.
In some embodiments of the present application, the controller is further configured with an outdoor unit internal volume and each indoor unit internal volume; the system refrigerant amount is calculated as follows:
MC=（（RCa*SCz2+RCb*SCz+RCc）*Vo）/Vos；
MC is the system refrigerant quantity;
SCz is the supercooling degree of the outdoor heat exchanger;
vo is the internal volume of the outdoor unit;
vos is the internal volume of the indoor unit which is online;
RCa, RCb, and RCc are coefficients.
In some embodiments of the present application, the controller is configured to first perform an ambient temperature determination when the refrigerant leakage amount detection mode is selected;
the controller is configured with an outdoor environment temperature threshold value and an indoor environment temperature threshold value, is configured to acquire an outdoor environment temperature and an indoor environment temperature, compares the outdoor environment temperature with the outdoor environment temperature threshold value, compares the indoor environment temperature with the indoor environment temperature threshold value, and starts the refrigerant leakage amount detection mode when the outdoor environment temperature is within the outdoor environment temperature threshold value range and the indoor environment temperature is within the indoor environment temperature threshold value range.
In some embodiments of the present application, the controller is configured with a compressor discharge temperature variation threshold, an indoor unit superheat minimum threshold, an indoor unit superheat maximum threshold, and a time threshold;
the controller is configured to cyclically acquire the exhaust temperature of the compressor and the superheat degree of the indoor unit when the refrigerant leakage detection mode is started and the running time of the compressor is longer than the set running time of the compressor, and compare the change value of the exhaust temperature of the compressor with the change threshold of the exhaust temperature of the compressor, the minimum value of the superheat degree of the indoor unit with the minimum threshold of the superheat degree of the indoor unit, and the maximum value of the superheat degree of the indoor unit with the maximum threshold of the superheat degree of the indoor unit;
and when the change value of the exhaust temperature of the compressor is judged to be smaller than the change threshold of the exhaust temperature of the compressor, the minimum value of the superheat degree of the indoor unit is larger than the minimum threshold of the superheat degree of the indoor unit, and the duration time that the maximum value of the superheat degree of the indoor unit is smaller than the maximum threshold of the superheat degree of the indoor unit exceeds the time threshold, calculating the refrigerant quantity of the system.
In some embodiments of the present application, the indoor unit superheat degree control includes the following contents;
the indoor unit also comprises an indoor unit expansion valve which is connected with the controller and is arranged in front of the inlet of the indoor heat exchanger;
the controller is configured with an initial opening value of an expansion valve, a preset superheat degree, a first set value and a second set value, and is configured to control the expansion valve of the indoor unit to operate at the initial opening value of the expansion valve, obtain the superheat degree of the indoor unit and compare the superheat degree of the indoor unit with the preset superheat degree;
when the difference between the superheat degree of the indoor unit and the preset superheat degree is larger than the first set value, controlling the expansion valve of the indoor unit to increase the opening degree;
when the difference between the superheat degree of the indoor unit and the preset superheat degree is smaller than the second set value, controlling the expansion valve of the indoor unit to reduce the opening degree;
the first set value and the second set value are both constants, and the first set value is larger than the second set value.
In some embodiments of the present application, the system high voltage control comprises the following;
the outdoor unit also comprises an outdoor fan which is connected with the controller; the controller is configured with an initial operating frequency of the outdoor fan, a preset high-pressure value, a third set value and a fourth set value, and is configured to control the outdoor fan to operate at the initial operating frequency of the outdoor fan, obtain a system high pressure and compare the system high pressure with the preset high-pressure value;
when the difference between the system high pressure and the preset high pressure value is larger than the third set value, controlling the running frequency of the outdoor fan to increase;
when the difference between the system high pressure and the preset high pressure value is smaller than the fourth set value, controlling the running frequency of the outdoor fan to be reduced;
the third set value and the fourth set value are both constants, and the third set value is larger than the fourth set value.
In some embodiments of the present application, the evaporation temperature control includes the following;
the controller is configured with a compressor operation frequency initial value, a preset evaporation temperature, a fifth set value and a sixth set value, and is configured to control the compressor to operate at the compressor operation frequency initial value, obtain the evaporation temperature, and compare the evaporation temperature with the preset evaporation temperature;
when the difference between the evaporation temperature and the preset evaporation temperature is larger than the fifth set value, controlling the running frequency of the compressor to increase;
when the difference between the evaporation temperature and the preset evaporation temperature is smaller than the sixth set value, controlling the running frequency of the compressor to be reduced;
the fifth set value and the sixth set value are both constants, and the fifth set value is greater than the sixth set value.
In some embodiments of the present application, the system further comprises a display module connected to the controller; the controller is configured with a plurality of codes; each code corresponds to different range values of the system refrigerant leakage quantity;
the controller is configured to judge the code corresponding to the refrigerant leakage amount and control the display module to display the code.
In some embodiments of the present application, the system further comprises a line controller, which comprises a display and a line controller; the line controller is configured with a refrigerant leakage detection mode;
the controller comprises an indoor controller, an outdoor controller and a wire controller; the indoor controller is respectively in communication connection with the wire controller and the outdoor controller; the code is controlled by the line controller for display by the display.
In some embodiments of the present application, the controller comprises an indoor controller, an outdoor controller, communicatively coupled thereto; the outdoor unit comprises an outdoor electric control board which is provided with a refrigerant leakage detection execution switch; the outdoor controller is arranged on the outdoor electric control board and is connected with the refrigerant leakage detection execution switch;
and when the refrigerant leakage detection execution switch is operated, the outdoor controller controls the refrigerant leakage detection mode to operate.
Drawings
Fig. 1 is a schematic view of a system configuration of a cooling and heating type embodiment of an air conditioning apparatus of the present invention;
FIG. 2 is a schematic diagram of a cooling only system configuration of an embodiment of the air conditioning apparatus of the present invention;
FIG. 3 is a schematic diagram of the control system connections of an embodiment of the air conditioning apparatus of the present invention;
FIG. 4 is a schematic diagram of the control system connections of an embodiment of the air conditioning apparatus of the present invention;
fig. 5 is a control flowchart of an embodiment of the air conditioner of the present invention;
fig. 6 is a control flowchart of an embodiment of the air conditioner of the present invention;
fig. 7 is a control flowchart of an embodiment of the air conditioner of the present invention;
FIG. 8 is a flow chart of superheat degree control of the indoor unit;
FIG. 9 is a system high pressure control flow chart;
fig. 10 is an evaporation temperature control flowchart.
Reference numerals:
1. a compressor; 2. a four-way valve; 3. an outdoor heat exchanger; 4. an outdoor fan; 5. an outdoor unit expansion valve; 7. an indoor unit expansion valve; 8. an indoor heat exchanger; 12. a display module; 13. an indoor temperature sensor; 14. an evaporation temperature sensor; 15. an outdoor temperature sensor; 16. an exhaust gas temperature sensor; 17. an exhaust pressure sensor; 18. a main liquid pipe temperature sensor; 19. an evaporator outlet temperature sensor; y, a wire controller; c1, a wire controller; c2, indoor controller; c3, outdoor sensors; MC, system refrigerant quantity; SCz, supercooling degree; vo, the indoor unit internal volume; vos, internal volume of the integrated machine; delta MC, leakage quantity of system refrigerant; TW, outdoor ambient temperature; TN, indoor ambient temperature; td, exhaust temperature; Δ T, exhaust temperature change threshold; SH, the superheat degree of an indoor unit; SH0, and presetting the superheat degree; SH1, minimum threshold; SH2, maximum threshold; t, a time threshold; tg, evaporator exit temperature; EVI, expansion valve opening degree; EVI0, an initial value of the opening degree of the expansion valve; a. a first set value; b. a second set value; pd, system high pressure; PdO, presetting system high pressure; FO, outdoor fan operating frequency; FO0, and an initial value of the running frequency of the outdoor fan; c. a third set value; d. a fourth set value; tl, evaporation temperature; TlO, presetting an evaporation temperature; tc, saturation temperature; te, main liquid pipe temperature; te _ ave, main liquid pipe average temperature; hi. Compressor operating frequency; hi0, initial value of running frequency of the compressor; e. a fifth set value; f. and a sixth set value.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, it is to be understood that the terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The invention provides an air conditioning device, which comprises an outdoor unit and at least one indoor unit, wherein the outdoor unit is connected with the indoor unit; the outdoor unit comprises a compressor 1, an outdoor heat exchanger 3, an outdoor unit expansion valve 5 and an outdoor fan 4; the indoor unit comprises an indoor heat exchanger 8 and an indoor unit expansion valve 7. The air conditioner performs a refrigeration cycle by using the compressor 1, the outdoor heat exchanger 3, the outdoor expansion valve 5, the indoor expansion valve 7, and the indoor heat exchanger 8. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation to refrigerate the indoor space.
When the outdoor unit of the air conditioner comprises the four-way valve 2, the flow direction of a refrigerant in the air conditioner is changed by changing the communication direction of the four-way valve 2, so that the functions of the outdoor heat exchanger 3 and the indoor heat exchanger 8 are changed, and the refrigerating and heating functions of the air conditioner are realized.
A specific procedure is as follows, the indoor heat exchanger 8 and the outdoor heat exchanger 3 are used as a condenser or an evaporator. When the indoor heat exchanger 8 functions as a condenser and the outdoor heat exchanger 3 functions as an evaporator, the air conditioning apparatus performs a heating mode; when the indoor heat exchanger 8 functions as an evaporator and the outdoor heat exchanger 3 functions as a condenser, the air conditioning device performs a cooling mode. The indoor expansion valve 7 and the outdoor expansion valve 5 are collectively called expansion valves, and are used for throttling.
The low-temperature and low-pressure refrigerant enters the compressor 1, and the compressor 1 compresses the refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the high-temperature and high-pressure liquid-phase refrigerant condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve, and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor 1. The evaporator can achieve a cooling effect by heat exchange with a material to be cooled using latent heat of evaporation of a refrigerant.
The indoor heat exchanger 8 and the outdoor heat exchanger 3 are switched to be used as a condenser or an evaporator, and the four-way valve 2 is generally adopted, and specific reference is made to the arrangement of a conventional air conditioner, which is not described herein again.
The refrigeration working principle of the air conditioner is as follows: the compressor 1 works to enable the interior of the indoor heat exchanger 8 (in an indoor unit, at the moment, an evaporator) to be in an ultralow pressure state, liquid refrigerants in the indoor heat exchanger 8 quickly evaporate and absorb heat, air blown out by an indoor fan is cooled through a coil pipe of the indoor heat exchanger 8 to become cold air and blow the cold air to the indoor, the evaporated and vaporized refrigerants are pressurized by the compressor 1 and then are condensed into liquid in a high-pressure environment in the outdoor heat exchanger 3 (in an outdoor unit, at the moment, a condenser) to release heat, the heat is dissipated into the atmosphere through the outdoor fan 4, and the refrigeration effect is achieved through the circulation.
The heating working principle of the air conditioner is as follows: the gaseous refrigerant is pressurized by the compressor 1 to become high-temperature and high-pressure gas, and the high-temperature and high-pressure gas enters the indoor heat exchanger 8 (in this case, a condenser), is condensed, liquefied and released heat to become liquid, and simultaneously heats indoor air, thereby achieving the purpose of increasing the indoor temperature. The liquid refrigerant is decompressed by the throttle device, enters the outdoor heat exchanger 3 (in this case, an evaporator), is evaporated, gasified, absorbs heat, turns into gas, absorbs heat of outdoor air (the outdoor air becomes cooler), turns into a gaseous refrigerant, and enters the compressor 1 again to start the next cycle.
Referring to fig. 1, 2, 3, 4, and 5, according to some embodiments of the present disclosure, the air conditioner further includes a controller configured with a refrigerant leakage amount detection mode.
When the refrigerant leakage detection mode is started, the controller controls the outdoor unit to operate in a refrigeration mode, executes indoor unit superheat degree control, system high-pressure control and evaporation temperature control, and continuously operates for a specific time to keep the distribution and density of the refrigerant in the indoor unit, the distribution and density of the refrigerant in the outdoor unit and the density of the refrigerant in the distribution pipe at specific values, so that the refrigerant amount in the system is only related to the supercooling degree SCz of the outdoor heat exchanger 3.
The controller is also configured with a compressor operation set time, and is configured to circularly judge whether the operation time of the compressor 1 reaches the compressor operation set time in the refrigerant leakage amount detection mode, and when the operation time of the compressor 1 is not less than the compressor operation set time, the degree of supercooling SCz of the outdoor heat exchanger 3 is obtained, and the system refrigerant amount MC is calculated.
And then the controller calculates the leakage amount of the system refrigerant. That is, the system refrigerant leakage amount Δ MC is equal to the difference between the system refrigerant amounts MC during two adjacent refrigerant leakage amount detection mode operations.
The air conditioning device of the embodiment controls the distribution state and the density of the refrigerant in the indoor unit to be at a specific value and the density of the refrigerant in the outdoor unit to be at the same specific value by controlling the superheat degree, the high pressure and the evaporation temperature of the indoor unit when the system runs, and the refrigerant quantity in the system is only related to the supercooling degree SCz of the outdoor heat exchanger 3 at the moment; the refrigerant quantity of a system at a certain moment can be accurately judged through the supercooling degree SCz of the system, and then the refrigerant leakage quantity is calculated according to the refrigerant quantity difference value between the moment and the previous moment without adopting correction parameters for correction, so that the influence of uncontrollable factors such as different indoor and outdoor unit connection combinations and different indoor and outdoor environment temperature changes on refrigerant quantity leakage detection is avoided, and the refrigerant quantity leakage detection precision is greatly improved.
The system refrigerant quantity MC in the system is judged at two different time points respectively, and the refrigerant leakage quantity in the period is determined through the difference value of the system refrigerant quantity MC of the two time points, so that after-sales personnel can obtain the leakage quantity of the system refrigerant in the period in a short time, the system problem is checked according to the leakage quantity, great convenience is provided for system maintenance and the like, and the service level is favorably improved.
It should be noted that the reason why the system high pressure control and the evaporation temperature control can control the density of the refrigerant of the indoor unit and the outdoor unit to be a specific value is that the pressure of the refrigerant in the system determines the density of the refrigerant, the density of the refrigerant in the condenser can be controlled by controlling the system high pressure Pd, and the evaporation temperature Tl, that is, the system low pressure, can be controlled to control the density of the refrigerant in the evaporator.
The inlet and outlet states of the indoor heat exchanger 8 are related to the system low pressure, the indoor unit superheat degree SH and the supercooling degree SCz of the outdoor heat exchanger 3, and the system low pressure and the indoor unit superheat degree SH are controlled to be at set levels, so that the state and the average density of a refrigerant in the indoor heat exchanger are only related to the supercooling degree SCz of the outdoor heat exchanger 3.
The density of the refrigerant in the pipe is basically determined, and the quality is fixed.
The inlet and outlet states of the outdoor heat exchanger 3 are related to the system high pressure Pd and the supercooling degree SCz of the outdoor heat exchanger 3. Therefore, when the system high pressure Pd is controlled at a specific value, the refrigerant quantity of the outdoor heat exchanger 3 is only related to the supercooling degree SCz of the outdoor heat exchanger 3; the larger the supercooling degree SCz is, the larger the proportion of the liquid refrigerant is, the higher the average density is, and the refrigerant amount of the exterior heat exchanger 3 becomes larger.
Therefore, the superheat degree of the indoor unit, the high-pressure control of the system and the evaporation temperature control are carried out, the density of the system refrigerant is controlled to be a specific value, the system refrigerant quantity MC is only related to the supercooling degree SCz of the outdoor heat exchanger 3, the system refrigerant quantity MC is calculated only through the supercooling degree SCz of the outdoor heat exchanger 3, and the calculation accuracy of the system refrigerant quantity MC is improved.
Referring to fig. 1, 2, 3, 4, 5, 6 and 7, according to some embodiments of the present application, the controller is further configured with an outdoor unit internal volume Vo, and indoor unit internal volumes; the system refrigerant quantity MC is calculated as follows.
MC=（（RCa*SCz2+RCb*SCz+RCc）*Vo）/Vos；
MC is system refrigerant quantity;
SCz is the supercooling degree of the outdoor heat exchanger 3;
vo is the internal volume of the outdoor unit;
vos is the internal volume of the integrated machine;
RCa, RCb, and RCc are coefficients.
Then Δ MC = MCn-1;
delta MC is the system refrigerant leakage amount detected by the refrigerant leakage amount detection mode;
MCn is the system refrigerant quantity detected by the refrigerant leakage quantity detection mode;
MCn-1 is the system refrigerant quantity detected in the last refrigerant leakage quantity detection mode.
The air conditioner of the embodiment calculates the system refrigerant quantity MC and the system refrigerant leakage quantity Δ MC by the correlation function of the supercooling degree SCz of the outdoor heat exchanger 3, so that the system refrigerant quantity MC and the system refrigerant leakage quantity Δ MC are digitized, and the detection precision of the system refrigerant leakage quantity Δ MC is improved.
In some embodiments of the present application, a main liquid pipe temperature sensor 18 is disposed at the outlet of the outdoor heat exchanger 3, and is connected to the controller for detecting the main liquid pipe temperature Te and transmitting the detected main liquid pipe temperature to the controller. System refrigerant quantity function MC = ((RCa) = SCz)2In + RCb SCz + RCc) Vo)/Vos, the supercooling degree SCz of the outdoor heat exchanger 3 is the average supercooling degree at the main liquid pipe temperature sensor 18, and can be calculated by the difference between the refrigerant saturation temperature Tc corresponding to the maximum system discharge pressure and the main liquid pipe average temperature Te _ ave.
The outdoor unit internal volume Vo is prestored in the controller; the on-line indoor unit internal volume is calculated by each indoor unit internal volume prestored in the controller; RCa, RCb and RCc are coefficients, and can be obtained by performing function fitting on system experiment results.
In some embodiments of the present application, referring to fig. 1, fig. 2, fig. 3, fig. 4, and fig. 6, the air conditioner includes an indoor temperature sensor and an outdoor temperature sensor, which are respectively connected to the controller, and are configured to detect an indoor ambient temperature TN and an outdoor ambient temperature TW, and transmit the detected indoor ambient temperature and outdoor ambient temperature TW to the controller.
When the operation refrigerant leakage amount detection mode is selected, the ambient temperature is judged firstly. The controller is configured with an outdoor ambient temperature threshold, an indoor ambient temperature threshold, and is configured to receive an outdoor ambient temperature TW, an indoor ambient temperature TN, compare the outdoor ambient temperature TW to the outdoor ambient temperature threshold, and compare the indoor ambient temperature TN to the indoor ambient temperature threshold. And starting a refrigerant leakage amount detection mode when the outdoor environment temperature TW is within the range of the outdoor environment temperature threshold and the indoor environment temperature TN is within the range of the indoor environment temperature threshold.
The air conditioner of this embodiment ensures its can stable operation refrigeration mode through the judgement of indoor ambient temperature TN and outdoor ambient temperature TW, prevents that the unstable system that causes of system refrigerant volume MC from revealing that the detection fails or is inaccurate, improves the reliability and the stability that the refrigerant lets out the volume and detects.
In some embodiments of the present application, the outdoor ambient temperature threshold is a range value (TW 1, TW 2); the TW1 is more than or equal to-20 ℃; TW2 is less than or equal to 43 ℃; the indoor environment temperature threshold is a range value (TN 1, TN 2); TN1 is more than or equal to 10 ℃; TN2 is less than or equal to 35 ℃.
In some embodiments of the present application, referring to fig. 1, 2, 3, 4, 5, 6 and 7, the air conditioning apparatus includes a discharge air temperature sensor 16 connected to the controller, disposed at the outlet of the compressor 1, for detecting and transmitting a compressor discharge air temperature Td to the controller.
The controller is provided with a compressor exhaust temperature change threshold delta T, an indoor unit superheat minimum value threshold SH1, an indoor unit superheat maximum value threshold SH2 and a time threshold T.
The controller is configured to cyclically acquire the discharge temperature Td of the compressor and the superheat degree SH of the indoor unit when the detection mode of the leakage amount of the refrigerant is started and the running time of the compressor 1 is longer than the set running time of the compressor, and compare the variation value of the discharge temperature Td of the compressor with the variation threshold delta T of the discharge temperature of the compressor, the minimum value of the superheat degree SH of the indoor unit with the minimum threshold value of the superheat degree of the indoor unit, and the maximum value of the superheat degree SH of the indoor unit with the threshold value SH2 of the maximum value of the superheat degree of the indoor unit.
And when the variation value of the discharge temperature Td of the compressor is judged to be smaller than the variation threshold delta T of the discharge temperature of the compressor, the minimum value of the superheat degree SH of the indoor unit is larger than the minimum threshold SH1 of the superheat degree of the indoor unit, and the duration time that the maximum value of the superheat degree SH of the indoor unit is smaller than the maximum threshold SH2 of the superheat degree of the indoor unit exceeds a time threshold T, calculating the system refrigerant quantity MC.
The embodiment of the invention ensures the stable system operation of the air conditioning device through the judgment of the exhaust temperature Td of the compressor and the judgment of the superheat SH of the indoor unit, and improves the accuracy and the reliability of the refrigerant quantity calculation.
In some embodiments of the present application, the set time of the compressor operation ranges from 10min to 20 min; the value range of the delta T of the exhaust temperature change threshold of the compressor is 2-4 ℃. The minimum threshold SH1 of the superheat degree of the indoor unit is preferably 2 ℃; the maximum value threshold SH2 of the superheat degree of the indoor unit is preferably 8 ℃; the value range of the time threshold t is preferably 2 min-5 min.
The air conditioner device also comprises an evaporator outlet temperature sensor 19 and an evaporation temperature sensor 14 which are respectively connected with the controller, respectively arranged at the outlet of the indoor heat exchanger 8 and the inlet of the indoor heat exchanger 8 and used for detecting the evaporator outlet temperature Tg and the evaporation temperature Tl and transmitting the detected temperature Tg and the evaporation temperature Tl to the controller. The indoor unit superheat degree SH is an outlet superheat degree of the indoor heat exchanger 8, and is calculated by a difference between an outlet temperature of the indoor heat exchanger 8 and the evaporation temperature Tl.
In some embodiments of the present application, referring to fig. 1, 2, 3, 4, 5, 6, 7, and 8, the indoor unit superheat degree control includes the following.
The indoor unit expansion valve 7 is connected with the controller; the controller is configured with an expansion valve opening initial value EVI0, a preset superheat SH0, a first set value a and a second set value b, and is configured to control the indoor unit expansion valve 7 to start operation at the expansion valve opening initial value EVI0, and cyclically acquire the indoor unit superheat SH and compare the indoor unit superheat SH with the preset superheat SH 0.
And when the difference between the indoor unit superheat SH and the preset superheat SH0 is larger than a first set value a, controlling the indoor unit expansion valve 7 to increase the opening degree for operation. That is, the expansion valve opening degree EVI increases.
And when the difference between the indoor unit superheat degree SH and the preset superheat degree SH0 is smaller than a second set value b, controlling the opening degree of the indoor unit expansion valve 7 to be reduced. That is, the expansion valve opening degree EVI decreases. The first set value a is greater than the second set value b.
The air conditioner of the embodiment maintains the superheat SH of the indoor unit in a stable range through the superheat control of the indoor unit, improves the stability of system operation, and enables the system refrigerant quantity MC to be only related to the supercooling SCz of the outdoor heat exchanger 3.
In some embodiments of the present application, the first set value a is a constant, which is greater than 0. The second set value b is a constant, which is less than 0.
In some embodiments of the present application, the value range of the first setting value a is (0, 10). The value range of the second set value b is (-10, 0).
In some embodiments of the present application, referring to fig. 1, 2, 3, 4, 5, 6, 7, and 9, the system high voltage control includes the following.
The outdoor fan 4 is connected with the controller. The air conditioner further comprises an exhaust pressure sensor 17 which is connected with the controller, arranged on the high-pressure side of the piping and used for detecting the system high pressure Pd and transmitting the system high pressure Pd to the controller.
The controller is configured with an initial value FO0 of the operating frequency of the outdoor fan, presets the system high voltage PdO, a third set value c and a fourth set value d, and is configured to control the outdoor fan 4 to start operation with the initial value FO0 of the operating frequency of the outdoor fan; the controller circularly obtains the system high pressure Pd and compares the system high pressure Pd with a preset system high pressure PdO.
And when the difference between the system high pressure Pd and the preset system high pressure PdO is larger than a third set value c, controlling the operation frequency FO of the outdoor fan to increase. .
And when the difference between the system high pressure Pd and the preset system high pressure PdO is smaller than a fourth set value d, controlling the operation frequency FO of the outdoor fan to be reduced.
The third set value c and the fourth set value d are both constants, and the third set value c is larger than the fourth set value d.
The air conditioning device of the embodiment enables the distribution of the refrigerant in the outdoor heat exchanger 3 to be stable and uniform and the density to be stable at a specific value through system high pressure control, and the refrigerant quantity in the outdoor heat exchanger 3 is only related to the supercooling degree SCz of the outdoor heat exchanger 3, so that the accuracy and the reliability of the calculation of the refrigerant quantity in the outdoor heat exchanger 3 are improved.
In some embodiments of the present application, the preset system high pressure PdO is set according to the ambient temperature. That is, the ambient temperature is different, and the preset system high pressure PdO is set to different values. The value range of the high pressure PdO of the system is (1.0, 4.0) and the unit is MPa.
In some embodiments of the present application, the third setting value c is greater than 0, and the value range is (0, 1.0). The fourth set value d is less than 0 and has a value range of (-1.0, 0).
In some embodiments of the present application, referring to fig. 1, 2, 3, 4, 5, 6, 7, and 10, the evaporation temperature control includes the following.
The air conditioner further comprises an evaporation temperature sensor 14 which is connected with the controller, is arranged in front of the inlet of the indoor heat exchanger 8, and is used for detecting the evaporation temperature Tl and transmitting the evaporation temperature Tl to the controller; the controller is configured with an initial compressor operating frequency value Hi0, a preset evaporating temperature TlO, a fifth set value e, and a sixth set value f, and is configured to control the compressor 1 to operate at the initial compressor operating frequency value Hi0, cyclically acquire the evaporating temperature Tl, and compare the evaporating temperature Tl with the preset evaporating temperature TlO.
And when the difference between the evaporation temperature Tl and the preset evaporation temperature TlO is greater than a fifth set value e, controlling the running frequency Hi of the compressor to increase.
And when the difference between the evaporation temperature Tl and the preset evaporation temperature TlO is less than a sixth set value, controlling the running frequency Hi of the compressor to be reduced.
The fifth set value e and the sixth set value f are both constants, and the fifth set value e is larger than the sixth set value f.
The air conditioning apparatus of the present embodiment controls the evaporation temperature Tl by adjusting the compressor operating frequency Hi to be maintained within a specific range, that is, controls the system low pressure to be maintained within a specific range, so that the distribution of the refrigerant in the indoor heat exchanger 8 is stable, the density is maintained at a specific value, and the accuracy and stability of the calculation of the amount of the refrigerant in the indoor heat exchanger 8 are improved.
In some embodiments of the present application, the fifth setting value e is greater than 0, and the value range is (0, 5). The sixth set value f is less than 0 and has a value range of (-5, 0).
In some embodiments of the present application, referring to fig. 3 and 4, the air conditioner further includes a display module 12 connected to the controller.
The controller is provided with a plurality of codes which respectively correspond to different refrigerant leakage quantity grades. That is, different codes correspond to refrigerant leakage amounts in different level ranges.
The controller is configured to determine a code corresponding to the system refrigerant leakage amount Δ MC and control the display module 12 to display the code.
The air conditioner of the embodiment enables maintenance personnel to read the code in a mode that the display module 12 displays the code to directly obtain the range of the leakage quantity delta MC of the system refrigerant, so that the leakage fault type of the refrigerant is judged, the display is simplified, the display cost is reduced, and the detection and maintenance efficiency is improved.
In some embodiments of the present application, when the refrigerant leakage detection mode is operated for the first time, the previous system refrigerant quantity MC value is not available, and the system refrigerant leakage quantity Δ MC cannot be detected, and the controller calculates the system refrigerant quantity MC and then controls the display module 12 to display that the detection is finished.
In some embodiments of the present application, the controller is pre-stored with an initial value of the refrigerant amount. When the refrigerant leakage detection mode is operated for the first time, the system refrigerant leakage delta MC is equal to the difference between the current system refrigerant MC and the pre-stored initial value of the refrigerant quantity, and is used for judging whether the system leaks relative to the initial value.
In some embodiments of the present application, referring to fig. 3, the air conditioning system further comprises a drive-by-wire Y comprising a display 121, a drive-by-wire controller C1; the display 121 is a display module 12, which is connected to the line controller C1, and the line controller C1 controls the display of corresponding codes.
The line controller C1 is configured with a refrigerant leakage detection mode; the display 121 is a touch display, and is provided with a refrigerant leakage amount detection mode button, and a refrigerant leakage amount detection mode is operated by the touch refrigerant leakage amount detection mode button.
In some embodiments of the present application, referring to fig. 3, the air conditioning system further comprises a drive-by-wire Y comprising a display 121, a drive-by-wire controller C1; the display 121 is a display module 12, which is connected to the line controller C1, and the line controller C1 controls the display of corresponding codes.
The line controller C1 is configured with a refrigerant leakage detection mode; the drive-by-wire device Y also comprises a plurality of mechanical keys which are respectively connected with the drive-by-wire device controller C1; the refrigerant leakage amount detection mode is operated by operating at least one mechanical key.
When the system refrigerant leakage quantity Δ MC is detected to operate in the mode, the line controller C1 controls the display 121 to display the corresponding mode operation identifier.
The air conditioning device of the embodiment prevents a user from starting a refrigerant leakage amount detection mode by misoperation to influence the user use experience.
In some embodiments of the present application, referring to fig. 3, the controllers include a line controller C1, an indoor controller C2, an outdoor controller C3; the indoor controller C2 is in communication connection with the outdoor controller C3 and the line controller C1 respectively; the contents of the controller configuration are respectively configured in any one or more of the line controller C1, the indoor controller C2, and the outdoor controller C3.
In some embodiments of the present application, referring to fig. 4, the controllers include an indoor controller C2, an outdoor controller C3; the indoor controller C2 is in communication connection with the outdoor controller C3; the outdoor unit also comprises an outdoor electric control board which is provided with a refrigerant leakage detection execution switch; the outdoor controller C3 is arranged on the outdoor electric control board and is connected with the refrigerant leakage detection execution switch. The contents of the controller configuration are respectively configured in one or more of the indoor controller C2 and the outdoor controller C3.
When the refrigerant leakage amount detection execution switch is operated, the outdoor controller C3 controls the operation of the refrigerant leakage amount detection mode.
The air conditioning device of this embodiment realizes the control of the operation of refrigerant leakage quantity detection mode through outdoor automatically controlled board, reduce cost, and thoroughly avoids user's maloperation, promotes user experience.
In some embodiments of the present application, the outdoor electronic control board may enable and disable the refrigerant leakage amount detection mode through the dial switch.
In some embodiments of the present application, the outdoor electronic control board further includes at least one LED lamp, which displays a code by flashing, reducing the cost of the display module.
The foregoing is directed to preferred embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims (10)

1. An air conditioning device comprises an outdoor unit, at least one indoor unit and a controller; the indoor unit is connected with the outdoor unit; the outdoor unit comprises a compressor and an outdoor heat exchanger; the indoor unit comprises an indoor heat exchanger and is characterized in that the controller is provided with a refrigerant leakage amount detection mode, and when the controller is started, the controller controls the outdoor unit to operate a refrigeration mode; and executing indoor unit superheat degree control, system high pressure control and evaporation temperature control;
the controller is provided with a compressor operation set time and configured to determine whether the operation time of the compressor in the refrigerant leakage amount detection mode reaches the compressor operation set time; if yes, obtaining the supercooling degree of the outdoor heat exchanger, and calculating the refrigerant quantity of the system;
the system refrigerant leakage amount is equal to the difference of the system refrigerant amounts of the two adjacent refrigerant leakage amount detection modes.
2. The air conditioning apparatus according to claim 1, wherein the controller is further provided with an outdoor unit internal volume and indoor unit internal volumes; the system refrigerant amount is calculated as follows:
MC=（（RCa*SCz2+RCb*SCz+RCc）*Vo）/Vos；
MC is the system refrigerant quantity;
SCz is the supercooling degree of the outdoor heat exchanger;
vo is the internal volume of the outdoor unit;
vos is the internal volume of the indoor unit which is online;
RCa, RCb, and RCc are coefficients.
3. The air conditioner as claimed in claim 1, wherein the controller is configured to first make an ambient temperature judgment when the refrigerant leakage amount detection mode is selected;
the controller is configured with an outdoor environment temperature threshold value and an indoor environment temperature threshold value, is configured to acquire an outdoor environment temperature and an indoor environment temperature, compares the outdoor environment temperature with the outdoor environment temperature threshold value, compares the indoor environment temperature with the indoor environment temperature threshold value, and starts the refrigerant leakage amount detection mode when the outdoor environment temperature is within the outdoor environment temperature threshold value range and the indoor environment temperature is within the indoor environment temperature threshold value range.
4. The air conditioner as claimed in claim 1, wherein the controller is configured with a compressor discharge temperature variation threshold, an indoor unit superheat minimum threshold, an indoor unit superheat maximum threshold, and a time threshold;
the controller is configured to cyclically acquire the exhaust temperature of the compressor and the superheat degree of the indoor unit when the refrigerant leakage detection mode is started and the running time of the compressor is longer than the set running time of the compressor, and compare the change value of the exhaust temperature of the compressor with the change threshold of the exhaust temperature of the compressor, the minimum value of the superheat degree of the indoor unit with the minimum threshold of the superheat degree of the indoor unit, and the maximum value of the superheat degree of the indoor unit with the maximum threshold of the superheat degree of the indoor unit;
and when the change value of the exhaust temperature of the compressor is judged to be smaller than the change threshold of the exhaust temperature of the compressor, the minimum value of the superheat degree of the indoor unit is larger than the minimum threshold of the superheat degree of the indoor unit, and the duration time that the maximum value of the superheat degree of the indoor unit is smaller than the maximum threshold of the superheat degree of the indoor unit exceeds the time threshold, calculating the refrigerant quantity of the system.
5. An air conditioning apparatus according to claim 1, wherein said indoor unit superheat degree control includes the following;
the indoor unit also comprises an indoor unit expansion valve which is connected with the controller and is arranged in front of the inlet of the indoor heat exchanger;
the controller is configured with an initial opening value of an expansion valve, a preset superheat degree, a first set value and a second set value, and is configured to control the expansion valve of the indoor unit to operate at the initial opening value of the expansion valve, obtain the superheat degree of the indoor unit and compare the superheat degree of the indoor unit with the preset superheat degree;
when the difference between the superheat degree of the indoor unit and the preset superheat degree is larger than the first set value, controlling the expansion valve of the indoor unit to increase the opening degree;
when the difference between the superheat degree of the indoor unit and the preset superheat degree is smaller than the second set value, controlling the expansion valve of the indoor unit to reduce the opening degree;
the first set value and the second set value are both constants, and the first set value is larger than the second set value.
6. The air conditioning apparatus according to claim 1, wherein the system high-pressure control includes the following;
the outdoor unit also comprises an outdoor fan which is connected with the controller; the controller is configured with an initial operating frequency of the outdoor fan, a preset high-pressure value, a third set value and a fourth set value, and is configured to control the outdoor fan to operate at the initial operating frequency of the outdoor fan, obtain a system high pressure and compare the system high pressure with the preset high-pressure value;
when the difference between the system high pressure and the preset high pressure value is larger than the third set value, controlling the running frequency of the outdoor fan to increase;
when the difference between the system high pressure and the preset high pressure value is smaller than the fourth set value, controlling the running frequency of the outdoor fan to be reduced;
the third set value and the fourth set value are both constants, and the third set value is larger than the fourth set value.
7. The air conditioner apparatus as claimed in claim 1, wherein said evaporation temperature control includes the following;
the controller is configured with a compressor operation frequency initial value, a preset evaporation temperature, a fifth set value and a sixth set value, and is configured to control the compressor to operate at the compressor operation frequency initial value, obtain the evaporation temperature and compare the evaporation temperature with the preset evaporation temperature;
when the difference between the evaporation temperature and the preset evaporation temperature is larger than the fifth set value, controlling the running frequency of the compressor to increase;
when the difference between the evaporation temperature and the preset evaporation temperature is smaller than the sixth set value, controlling the running frequency of the compressor to be reduced;
the fifth set value and the sixth set value are both constants, and the fifth set value is greater than the sixth set value.
8. The air conditioning apparatus according to any one of claims 1 to 7, further comprising a display module connected to the controller; the controller is configured with a plurality of codes; each code corresponds to different range values of the system refrigerant leakage quantity;
the controller is configured to judge the code corresponding to the refrigerant leakage amount and control the display module to display the code.
9. The air conditioning apparatus of claim 8, further comprising a line controller including a display, a line controller; the line controller is configured with a refrigerant leakage detection mode;
the controller comprises an indoor controller, an outdoor controller and a wire controller; the indoor controller is respectively in communication connection with the wire controller and the outdoor controller; the code is controlled by the line controller for display by the display.
10. The air conditioning unit of claim 8, wherein the controller comprises an indoor controller, an outdoor controller, communicatively coupled; the outdoor unit comprises an outdoor electric control board which is provided with a refrigerant leakage detection execution switch; the outdoor controller is arranged on the outdoor electric control board and is connected with the refrigerant leakage detection execution switch;
and when the refrigerant leakage detection execution switch is operated, the outdoor controller controls the refrigerant leakage detection mode to operate.
CN202210218830.6A 2022-03-08 2022-03-08 Air conditioner Active CN114543259B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210218830.6A CN114543259B (en) 2022-03-08 2022-03-08 Air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210218830.6A CN114543259B (en) 2022-03-08 2022-03-08 Air conditioner

Publications (2)

Publication Number Publication Date
CN114543259A true CN114543259A (en) 2022-05-27
CN114543259B CN114543259B (en) 2023-10-17

Family

ID=81662796

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210218830.6A Active CN114543259B (en) 2022-03-08 2022-03-08 Air conditioner

Country Status (1)

Country Link
CN (1) CN114543259B (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114963299A (en) * 2022-06-30 2022-08-30 海信空调有限公司 Air conditioner

Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000227259A (en) * 1999-02-02 2000-08-15 Mitsubishi Electric Corp Cooler
JP2008096051A (en) * 2006-10-13 2008-04-24 Mitsubishi Heavy Ind Ltd Coolant charged amount determining method and coolant leakage detecting method for multiple type air conditioning system
CN103712309A (en) * 2012-10-04 2014-04-09 Tcl空调器(中山)有限公司 Air-conditioner refrigerant flow control method
CN105890116A (en) * 2016-04-27 2016-08-24 芜湖美智空调设备有限公司 Detection method and system for leakage of refrigerant of air conditioner
JP2017075761A (en) * 2015-10-16 2017-04-20 ダイキン工業株式会社 Water heating device
CN106679085A (en) * 2016-12-27 2017-05-17 广东美的暖通设备有限公司 Multi-split system and control method thereof
CN106766439A (en) * 2016-12-31 2017-05-31 广州市粤联水产制冷工程有限公司 A kind of refrigerant leakage detecting device and detection method
CN107289599A (en) * 2017-08-10 2017-10-24 四川长虹电器股份有限公司 A kind of apparatus and method for detecting air conditioner coolant amount of leakage
CN109073304A (en) * 2016-04-15 2018-12-21 三菱电机株式会社 Refrigerating plant
US20190323917A1 (en) * 2018-04-13 2019-10-24 Carrier Corporation Air cooling heat pump system, refrigerant leakage detection method and detection system air cooling heat pump system thereof
CN113405243A (en) * 2020-03-16 2021-09-17 青岛海尔空调电子有限公司 Control method of air conditioning system
CN113465240A (en) * 2021-06-29 2021-10-01 青岛海信日立空调系统有限公司 Refrigerant filling method and device
CN113865029A (en) * 2021-09-30 2021-12-31 青岛海信日立空调系统有限公司 Air conditioner

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000227259A (en) * 1999-02-02 2000-08-15 Mitsubishi Electric Corp Cooler
JP2008096051A (en) * 2006-10-13 2008-04-24 Mitsubishi Heavy Ind Ltd Coolant charged amount determining method and coolant leakage detecting method for multiple type air conditioning system
CN103712309A (en) * 2012-10-04 2014-04-09 Tcl空调器(中山)有限公司 Air-conditioner refrigerant flow control method
JP2017075761A (en) * 2015-10-16 2017-04-20 ダイキン工業株式会社 Water heating device
CN109073304A (en) * 2016-04-15 2018-12-21 三菱电机株式会社 Refrigerating plant
CN105890116A (en) * 2016-04-27 2016-08-24 芜湖美智空调设备有限公司 Detection method and system for leakage of refrigerant of air conditioner
CN106679085A (en) * 2016-12-27 2017-05-17 广东美的暖通设备有限公司 Multi-split system and control method thereof
CN106766439A (en) * 2016-12-31 2017-05-31 广州市粤联水产制冷工程有限公司 A kind of refrigerant leakage detecting device and detection method
CN107289599A (en) * 2017-08-10 2017-10-24 四川长虹电器股份有限公司 A kind of apparatus and method for detecting air conditioner coolant amount of leakage
US20190323917A1 (en) * 2018-04-13 2019-10-24 Carrier Corporation Air cooling heat pump system, refrigerant leakage detection method and detection system air cooling heat pump system thereof
CN113405243A (en) * 2020-03-16 2021-09-17 青岛海尔空调电子有限公司 Control method of air conditioning system
CN113465240A (en) * 2021-06-29 2021-10-01 青岛海信日立空调系统有限公司 Refrigerant filling method and device
CN113865029A (en) * 2021-09-30 2021-12-31 青岛海信日立空调系统有限公司 Air conditioner

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114963299A (en) * 2022-06-30 2022-08-30 海信空调有限公司 Air conditioner
CN114963299B (en) * 2022-06-30 2023-11-03 海信空调有限公司 Air conditioner

Also Published As

Publication number Publication date
CN114543259B (en) 2023-10-17

Similar Documents

Publication Publication Date Title
CN110940055B (en) Heating and defrosting control method and device for air conditioner and air conditioner
US6807815B2 (en) Air conditioning system and method for operating the same
US8069682B2 (en) Air conditioner that corrects refrigerant quantity determination based on refrigerant temperature
CN111578460B (en) Air conditioner
US20160245570A1 (en) Air conditioner and method for controlling the same
CN113865029B (en) Air conditioner
EP3730875B1 (en) Air conditioner and control method therefor
KR102365378B1 (en) Air conditioner and control method thereof
WO2020115935A1 (en) Air conditioning system
CN111780382A (en) Air conditioner
KR20180081212A (en) Air conditioner and control method thereof
JPH11211292A (en) Refrigerant leakage detector and refrigerant leakage detection method for freezer
KR20190035060A (en) Air conditional and control method thereof
CN114543259B (en) Air conditioner
CN111981654A (en) Control method for optimizing energy efficiency of air conditioner
CN116123663A (en) Air conditioner
JP2019002639A (en) Refrigerant leakage detection method of ari conditioner, and air conditioner
JP3668750B2 (en) Air conditioner
CN111279141B (en) Refrigeration and air conditioning apparatus and control device
CN113883579B (en) Water system air conditioner
JP2017227356A (en) Freezer and actuation determination method of pressure switch
US20220146165A1 (en) Air conditioning apparatus
KR100736794B1 (en) Apparatus and method for preventing evaporator over cooling in air-conditioning system of vehicle
CN114857664B (en) Multi-split air conditioner system
CN114543305B (en) Air conditioner control method and device and air conditioner

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