CN104566645A - Multi-slit air conditioner, air conditioner anti-freezing protection method and air conditioner anti-freezing protection system - Google Patents
Multi-slit air conditioner, air conditioner anti-freezing protection method and air conditioner anti-freezing protection system Download PDFInfo
- Publication number
- CN104566645A CN104566645A CN201410748716.XA CN201410748716A CN104566645A CN 104566645 A CN104566645 A CN 104566645A CN 201410748716 A CN201410748716 A CN 201410748716A CN 104566645 A CN104566645 A CN 104566645A
- Authority
- CN
- China
- Prior art keywords
- indoor set
- temperature
- air conditioner
- outlet refrigerant
- compressor
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The invention provides a multi-slit air conditioner, an air conditioner anti-freezing protection method and an air conditioner anti-freezing protection system. The multi-split air conditioner comprises a plurality of indoor units, temperature sensors and an outdoor unit, wherein each indoor unit is connected with the outdoor unit of the multi-slit air conditioner through a low-pressure valve air return pipe, each temperature sensor is arranged on the corresponding low-pressure valve air return pipe, and is used for detecting the temperature of a coolant output of the corresponding indoor unit connected with the corresponding low-pressure valve air return pipe in a refrigeration mode or a dehumidifying mode, and sending the detection result to the outdoor unit, and the outdoor unit is used for receiving the detection result from each temperature sensor, and judging whether the temperature of the coolant outlet of each indoor unit meets the preset anti-freezing condition or not according to the detection result, and decreasing the efficiency of a compressor of the outdoor unit when the temperature of the coolant outlet of each indoor unit meets the preset anti-freezing condition. By adopting the technical scheme, the multi-slit air conditioner has the advantage that the efficiency of the compressor of the outdoor unit can be decreased according to the temperature of the coolant outlet of each indoor unit, so the freezing of an evaporator of the corresponding indoor unit is prevented, and the corresponding compressor does not need to stop running.
Description
Technical field
The present invention relates to field of terminal technology, in particular to a kind of multi-split air conditioner, a kind of air-conditioning anti-frost protection method and a kind of air-conditioning anti-frost protection system.
Background technology
At present, the multi-split air conditioner on market is when freezing, and evaporimeter and the outdoor pipeline of the off-premises station of multi-split air conditioner easily produce frost.In the prior art, generally meeting set temperature sensor on the evaporimeter of indoor set, when temperature sensor detects that the temperature of evaporimeter is below the freezing point, will carry out regular deicing to indoor set.In this ice detachment, the compressor of off-premises station can quit work, and indoor set is automatic dissolving frost under the brushing of natural wind.
But, multi-split air conditioner has the advantages that to use room more, temperature needed for its different room is different, the use habit of user is also different, if the temperature of an indoor set reaches the freezing point with regard to the compressor of off-premises station out of service, the indoor set that other room will be caused to install can not continue refrigeration.But if produce frost in an indoor set, and the compressor of off-premises station also continues to run, and the refrigerant getting back to compressor will be caused to be in back liquid status for a long time, make compressor easily produce liquid hammer situation.
Therefore, how while the security of compressor of outdoor unit ensureing multi-split air conditioner, prevent the evaporator freeze of indoor set, become current problem demanding prompt solution.
Summary of the invention
The present invention, just based on the problems referred to above, proposes a kind of new technical scheme, while the security of compressor of outdoor unit ensureing multi-split air conditioner, can prevent the evaporator freeze of indoor set.
For this reason, one object of the present invention is to propose a kind of multi-split air conditioner.
Another object of the present invention is to propose a kind of air-conditioning anti-frost protection method.
Another object of the present invention is to propose a kind of air-conditioning anti-frost protection system.
For achieving the above object, the embodiment of a first aspect of the present invention proposes a kind of multi-split air conditioner, comprising: multiple indoor set, and each indoor set in described multiple indoor set is connected to the off-premises station of described multi-split air conditioner by low pressure valve muffler; Temperature sensor, is arranged on described low pressure valve muffler, under refrigeration mode or dehumidification mode, detects the outlet refrigerant temperature of the described indoor set be connected with described low pressure valve muffler, and testing result is sent to described off-premises station; Described off-premises station, for receiving the described testing result from described temperature sensor, and according to described testing result, judge whether the described outlet refrigerant temperature of described indoor set meets and preset anti-freeze condition, and when described outlet refrigerant temperature meets described default anti-freeze condition, reduce the compressor frequency of described off-premises station.
According to the multi-split air conditioner of the embodiment of the present invention, when multi-split air conditioner is under refrigeration mode or dehumidification mode, by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
According to one embodiment of present invention, described default anti-freeze condition comprises: described outlet refrigerant temperature is less than or equal to the first preset temperature in predetermined time interval; Or described outlet refrigerant temperature is less than or equal to the second preset temperature; Wherein said first preset temperature is greater than described second preset temperature.
According to the multi-split air conditioner of the embodiment of the present invention, the actual needs that predetermined time interval, the first preset temperature, the second preset temperature can run according to multi-split air conditioner is arranged, wherein, preferably, predetermined time interval is 250s, first preset temperature is 4 DEG C, and the second preset temperature is 0 DEG C.
The embodiment of a second aspect of the present invention proposes a kind of air-conditioning anti-frost protection method, comprising: under refrigeration mode or dehumidification mode, is detected the outlet refrigerant temperature of multiple indoor sets of described multi-split air conditioner by the temperature sensor on low pressure valve muffler; According to testing result, determine whether to have in described multiple indoor set the described outlet refrigerant temperature of arbitrary indoor set to meet and preset anti-freeze condition; When determining that the described outlet refrigerant temperature of described arbitrary indoor set meets described default anti-freeze condition, close the expansion valve on the described low pressure valve muffler of described arbitrary indoor set, and reduce the compressor frequency of the off-premises station of described multi-split air conditioner, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; when multi-split air conditioner is under refrigeration mode or dehumidification mode; by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
According to one embodiment of present invention, also comprise: before the described refrigeration mode of operation or described dehumidification mode, and during the compressor off-duty of described off-premises station, judge whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the first preset temperature; When judged result is for being, the normal described compressor running described off-premises station, when judged result is no, directly cuts out the described expansion valve on the described low pressure valve muffler of described arbitrary indoor set, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; multi-split air conditioner is before running refrigerating pattern or dehumidification mode; if the compressor of off-premises station also off-duty; directly antifreeze process can be carried out when detecting that outlet refrigerant temperature is more than or equal to the first preset temperature; thus ensure that multi-split air conditioner can normally run when starting, improve practicality and the Consumer's Experience of multi-split air conditioner.Wherein, the actual needs that the first preset temperature can run according to multi-split air conditioner is arranged, and preferably, the first preset temperature is 4 DEG C.
According to one embodiment of present invention, after starting to carry out described anti-freeze process, also comprise: determine whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the 3rd preset temperature; When determining that described outlet refrigerant temperature is more than or equal to described 3rd preset temperature, judge whether the time of carrying out described anti-freeze process exceedes the predetermined anti-freeze processing time; When judged result is for being, open the described expansion valve on the described low pressure valve muffler of arbitrary indoor set, and recover the described compressor frequency of described off-premises station; When judged result is no, proceed described anti-freeze process.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; after anti-freeze process is carried out to indoor set; if the outlet refrigerant temperature of indoor set has gone up to the 3rd predetermined temperature; and be continued above the predetermined anti-freeze processing time; illustrate that the evaporimeter of indoor set recovers normal condition, now, the compressor frequency of off-premises station can be recovered; to recover normal refrigeration or to remove wet condition, to ensure the safe operation of multi-split air conditioner.Wherein, the actual needs that the 3rd preset temperature can run according to multi-split air conditioner is arranged, and preferably, the 3rd preset temperature is 8 DEG C.
According to one embodiment of present invention, after proceeding described anti-freeze process, comprise: when described outlet refrigerant temperature is less than or equal to the 4th preset temperature, every first scheduled time, described compressor frequency is reduced the first predetermined value, until described compressor frequency is reduced to predetermined low-limit frequency; And when described outlet refrigerant temperature is more than or equal to the 5th preset temperature, every second scheduled time, described compressor frequency is raised the second predetermined value, until described compressor frequency is increased to the target frequency of described compressor.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; carry out in the process of antifreeze process at indoor set; when outlet refrigerant temperature is lower than the 4th preset temperature; compressor frequency can be reduced the first predetermined value every first scheduled time; to ensure normally carrying out of work of thawing, one is made to drag many air-conditionings to recover normal operating conditions as early as possible.When outlet refrigerant temperature is more than or equal to the 5th preset temperature, illustrate that the evaporator temperature of indoor set gos up, the situation of freezing has certain improvement, therefore, compressor frequency can be raised the second predetermined value every second scheduled time, reduce Thawing Rate, make the compressor frequency of off-premises station slowly recover normal condition.Wherein, the actual needs that 4th preset temperature, first scheduled time, the first predetermined value, the 5th preset temperature, second scheduled time, the second predetermined value can be run according to multi-split air conditioner is arranged, wherein, preferably, the 4th preset temperature is 5 DEG C, and first scheduled time was 60s, first predetermined value is generally the size of a compressor gear value, 5th preset temperature is 7 DEG C, and second scheduled time was 120s, and the second predetermined value is generally the size of a compressor gear value.
The embodiment of a third aspect of the present invention proposes a kind of air-conditioning anti-frost protection system, comprise: detecting unit, under refrigeration mode or dehumidification mode, detected the outlet refrigerant temperature of multiple indoor sets of described multi-split air conditioner by the temperature sensor on low pressure valve muffler; Whether determining unit, according to testing result, determine to have in described multiple indoor set the described outlet refrigerant temperature of arbitrary indoor set to meet and preset anti-freeze condition; Anti-freeze processing unit, when determining that the described outlet refrigerant temperature of described arbitrary indoor set meets described default anti-freeze condition, close the expansion valve on the described low pressure valve muffler of described arbitrary indoor set, and reduce the compressor frequency of the off-premises station of described multi-split air conditioner, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection system of the embodiment of the present invention; when multi-split air conditioner is under refrigeration mode or dehumidification mode; by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
According to one embodiment of present invention, also comprise: the first judging unit, before the described refrigeration mode of operation or described dehumidification mode, and during the compressor off-duty of described off-premises station, judge whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the first preset temperature, wherein, when judged result is for being, the described compressor of the described off-premises station of normal operation, when judged result is no, described expansion valve on the described low pressure valve muffler of the described arbitrary indoor set of direct closedown, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection system of the embodiment of the present invention; multi-split air conditioner is before running refrigerating pattern or dehumidification mode; if the compressor of off-premises station also off-duty; directly antifreeze process can be carried out when detecting that outlet refrigerant temperature is more than or equal to the first preset temperature; thus ensure that multi-split air conditioner can normally run when starting, improve practicality and the Consumer's Experience of multi-split air conditioner.Wherein, the actual needs that the first preset temperature can run according to multi-split air conditioner is arranged, and preferably, the first preset temperature is 4 DEG C.
According to one embodiment of present invention, described determining unit also for: after starting to carry out described anti-freeze process, determine whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the 3rd preset temperature; And described air-conditioning anti-frost protection system also comprises: the second judging unit; when determining that described outlet refrigerant temperature is more than or equal to described 3rd preset temperature; judge whether the time of carrying out described anti-freeze process exceedes the predetermined anti-freeze processing time; wherein; when judged result is for being, open the described expansion valve on the described low pressure valve muffler of arbitrary indoor set, and recover the described compressor frequency of described off-premises station; when judged result is no, proceed described anti-freeze process.
According to the air-conditioning anti-frost protection system of the embodiment of the present invention; after anti-freeze process is carried out to indoor set; if the outlet refrigerant temperature of indoor set has gone up to the 3rd predetermined temperature; and be continued above the predetermined anti-freeze processing time; illustrate that the evaporimeter of indoor set recovers normal condition, now, the compressor frequency of off-premises station can be recovered; to recover normal refrigeration or to remove wet condition, to ensure the safe operation of multi-split air conditioner.Wherein, the actual needs that the 3rd preset temperature can run according to multi-split air conditioner is arranged, and preferably, the 3rd preset temperature is 8 DEG C.
According to one embodiment of present invention, described anti-freeze processing unit also for: after proceeding described anti-freeze process, when described outlet refrigerant temperature is less than or equal to the 4th preset temperature, every first scheduled time, described compressor frequency is reduced the first predetermined value, until described compressor frequency is reduced to predetermined low-limit frequency, and when described outlet refrigerant temperature is more than or equal to the 5th preset temperature, every second scheduled time, described compressor frequency is raised the second predetermined value, until described compressor frequency to be increased to the target frequency of described compressor.
According to the air-conditioning anti-frost protection system of the embodiment of the present invention; carry out in the process of antifreeze process at indoor set; when outlet refrigerant temperature is lower than the 4th preset temperature; compressor frequency can be reduced the first predetermined value every first scheduled time; to ensure normally carrying out of work of thawing, one is made to drag many air-conditionings to recover normal operating conditions as early as possible.When outlet refrigerant temperature is more than or equal to the 5th preset temperature, illustrate that the evaporator temperature of indoor set gos up, the situation of freezing has certain improvement, therefore, compressor frequency can be raised the second predetermined value every second scheduled time, reduce Thawing Rate, make the compressor frequency of off-premises station slowly recover normal condition.Wherein, the actual needs that 4th preset temperature, first scheduled time, the first predetermined value, the 5th preset temperature, second scheduled time, the second predetermined value can be run according to multi-split air conditioner is arranged, wherein, preferably, the 4th preset temperature is 5 DEG C, and first scheduled time was 60s, first predetermined value is generally the size of a compressor gear value, 5th preset temperature is 7 DEG C, and second scheduled time was 120s, and the second predetermined value is generally the size of a compressor gear value.
By above technical scheme, when multi-split air conditioner is under refrigeration mode or dehumidification mode, by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
Accompanying drawing explanation
Figure 1A shows the block diagram of multi-split air conditioner according to an embodiment of the invention;
Figure 1B shows the electrical block diagram of the multi-split air conditioner in Figure 1A;
Fig. 2 shows the flow chart of air-conditioning anti-frost protection method according to an embodiment of the invention;
Fig. 3 shows the flow chart of air-conditioning anti-frost protection method according to another embodiment of the invention;
Fig. 4 shows the block diagram of air-conditioning anti-frost protection system according to an embodiment of the invention.
Detailed description of the invention
In order to more clearly understand above-mentioned purpose of the present invention, feature and advantage, below in conjunction with the drawings and specific embodiments, the present invention is further described in detail.It should be noted that, when not conflicting, the feature in the embodiment of the application and embodiment can combine mutually.
Set forth a lot of detail in the following description so that fully understand the present invention; but; the present invention can also adopt other to be different from other modes described here and implement, and therefore, protection scope of the present invention is not by the restriction of following public specific embodiment.
Figure 1A shows the block diagram of multi-split air conditioner according to an embodiment of the invention, and Figure 1B shows the electrical block diagram of the multi-split air conditioner in Figure 1A.
As shown in Figure 1A, multi-split air conditioner 100 according to an embodiment of the invention, comprising: multiple indoor set 102, and each indoor set in multiple indoor set 102 is connected to the off-premises station 106 of multi-split air conditioner by low pressure valve muffler; Temperature sensor 104, is arranged on low pressure valve muffler, under refrigeration mode or dehumidification mode, detects the outlet refrigerant temperature of the indoor set be connected with low pressure valve muffler, and testing result is sent to off-premises station 106; Off-premises station 106, for receiving the testing result from temperature sensor 104, and according to testing result, judging whether the outlet refrigerant temperature of indoor set meets and presetting anti-freeze condition, and when outlet refrigerant temperature meets default anti-freeze condition, reduce the compressor frequency of off-premises station 106.
According to the multi-split air conditioner of the embodiment of the present invention, when multi-split air conditioner is under refrigeration mode or dehumidification mode, by set temperature sensor 104 on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station 106 can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping off-premises station 106 compressor operating is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of off-premises station 106 compressor of multi-split air conditioner.
According to one embodiment of present invention, preset anti-freeze condition to comprise: outlet refrigerant temperature is less than or equal to the first preset temperature in predetermined time interval; Or outlet refrigerant temperature is less than or equal to the second preset temperature; Wherein the first preset temperature is greater than the second preset temperature.
According to the multi-split air conditioner of the embodiment of the present invention, the actual needs that predetermined time interval, the first preset temperature, the second preset temperature can run according to multi-split air conditioner is arranged, wherein, preferably, predetermined time interval is 250s, first preset temperature is 4 DEG C, and the second preset temperature is 0 DEG C.
Fig. 2 shows the flow chart of air-conditioning anti-frost protection method according to an embodiment of the invention.
As shown in Figure 2, air-conditioning anti-frost protection method according to an embodiment of the invention, comprising:
Step 202, under refrigeration mode or dehumidification mode, detects the outlet refrigerant temperature of multiple indoor sets of described multi-split air conditioner by the temperature sensor on low pressure valve muffler.
Whether step 204, according to testing result, determine to have in described multiple indoor set the described outlet refrigerant temperature of arbitrary indoor set to meet and preset anti-freeze condition.
Step 206, when determining that the described outlet refrigerant temperature of described arbitrary indoor set meets described default anti-freeze condition, close the expansion valve on the described low pressure valve muffler of described arbitrary indoor set, and reduce the compressor frequency of the off-premises station of described multi-split air conditioner, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; when multi-split air conditioner is under refrigeration mode or dehumidification mode; by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
According to one embodiment of present invention, also comprise: before the described refrigeration mode of operation or described dehumidification mode, and during the compressor off-duty of described off-premises station, judge whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the first preset temperature; When judged result is for being, the normal described compressor running described off-premises station, when judged result is no, directly cuts out the described expansion valve on the described low pressure valve muffler of described arbitrary indoor set, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; multi-split air conditioner is before running refrigerating pattern or dehumidification mode; if the compressor of off-premises station also off-duty; directly antifreeze process can be carried out when detecting that outlet refrigerant temperature is more than or equal to the first preset temperature; thus ensure that multi-split air conditioner can normally run when starting, improve practicality and the Consumer's Experience of multi-split air conditioner.Wherein, the actual needs that the first preset temperature can run according to multi-split air conditioner is arranged, and preferably, the first preset temperature is 4 DEG C.
According to one embodiment of present invention, after starting to carry out described anti-freeze process, also comprise: determine whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the 3rd preset temperature; When determining that described outlet refrigerant temperature is more than or equal to described 3rd preset temperature, judge whether the time of carrying out described anti-freeze process exceedes the predetermined anti-freeze processing time; When judged result is for being, open the described expansion valve on the described low pressure valve muffler of arbitrary indoor set, and recover the described compressor frequency of described off-premises station; When judged result is no, proceed described anti-freeze process.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; after anti-freeze process is carried out to indoor set; if the outlet refrigerant temperature of indoor set has gone up to the 3rd predetermined temperature; and be continued above the predetermined anti-freeze processing time; illustrate that the evaporimeter of indoor set recovers normal condition, now, the compressor frequency of off-premises station can be recovered; to recover normal refrigeration or to remove wet condition, to ensure the safe operation of multi-split air conditioner.Wherein, the actual needs that the 3rd preset temperature can run according to multi-split air conditioner is arranged, and preferably, the 3rd preset temperature is 8 DEG C.
According to one embodiment of present invention, after proceeding described anti-freeze process, comprise: when described outlet refrigerant temperature is less than or equal to the 4th preset temperature, every first scheduled time, described compressor frequency is reduced the first predetermined value, until described compressor frequency is reduced to predetermined low-limit frequency; And when described outlet refrigerant temperature is more than or equal to the 5th preset temperature, every second scheduled time, described compressor frequency is raised the second predetermined value, until described compressor frequency is increased to the target frequency of described compressor.
According to the air-conditioning anti-frost protection method of the embodiment of the present invention; carry out in the process of antifreeze process at indoor set; when outlet refrigerant temperature is lower than the 4th preset temperature; compressor frequency can be reduced the first predetermined value every first scheduled time; to ensure normally carrying out of work of thawing, one is made to drag many air-conditionings to recover normal operating conditions as early as possible.When outlet refrigerant temperature is more than or equal to the 5th preset temperature, illustrate that the evaporator temperature of indoor set gos up, the situation of freezing has certain improvement, therefore, compressor frequency can be raised the second predetermined value every second scheduled time, reduce Thawing Rate, make the compressor frequency of off-premises station slowly recover normal condition.Wherein, the actual needs that 4th preset temperature, first scheduled time, the first predetermined value, the 5th preset temperature, second scheduled time, the second predetermined value can be run according to multi-split air conditioner is arranged, wherein, preferably, the 4th preset temperature is 5 DEG C, and first scheduled time was 60s, first predetermined value is generally the size of a compressor gear value, 5th preset temperature is 7 DEG C, and second scheduled time was 120s, and the second predetermined value is generally the size of a compressor gear value.
Fig. 3 shows the flow chart of air-conditioning anti-frost protection method according to another embodiment of the invention.
As shown in Figure 3, air-conditioning anti-frost protection method according to another embodiment of the invention, comprising:
Step 302, multi-split air conditioner, under refrigeration mode or dehumidifier pattern, detects the temperature T of indoor-unit cooling-medium mouth with temperature sensor.
Step 304, as T>=8 DEG C, and has performed antifreeze process 3 minutes, has entered step 310.
Step 306, as T<=4 DEG C, and T maintains in this temperature range for continuous 250 seconds, enters step 312.
Step 308, as T<=0 DEG C, enters step 314.
Step 310, terminates antifreeze process, opens electric expansion valve.
Step 312, closes electric expansion valve, performs antifreeze process, and as T<5 DEG C, enters step 314, as T>7 DEG C, enter step 316.
Step 314, as T<5 DEG C, the compressor frequency of 1 gear of falling per minute is until low-limit frequency.
Step 316, as T>7 DEG C, compressor rises 1 gear frequency for every 2 minutes until target frequency.
Fig. 4 shows the block diagram of air-conditioning anti-frost protection system according to an embodiment of the invention;
As shown in Figure 4, air-conditioning anti-frost protection system 400 according to an embodiment of the invention, comprise: detecting unit 402, under refrigeration mode or dehumidification mode, detected the outlet refrigerant temperature of multiple indoor sets of described multi-split air conditioner by the temperature sensor on low pressure valve muffler; Whether determining unit 404, according to testing result, determine to have in described multiple indoor set the described outlet refrigerant temperature of arbitrary indoor set to meet and preset anti-freeze condition; Anti-freeze processing unit 406, when determining that the described outlet refrigerant temperature of described arbitrary indoor set meets described default anti-freeze condition, close the expansion valve on the described low pressure valve muffler of described arbitrary indoor set, and reduce the compressor frequency of the off-premises station of described multi-split air conditioner, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection system 400 of the embodiment of the present invention; when multi-split air conditioner is under refrigeration mode or dehumidification mode; by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
According to one embodiment of present invention, also comprise: the first judging unit 408, before the described refrigeration mode of operation or described dehumidification mode, and during the compressor off-duty of described off-premises station, judge whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the first preset temperature, wherein, when judged result is for being, the described compressor of the described off-premises station of normal operation, when judged result is no, described expansion valve on the described low pressure valve muffler of the described arbitrary indoor set of direct closedown, to carry out anti-freeze process.
According to the air-conditioning anti-frost protection system 400 of the embodiment of the present invention; multi-split air conditioner is before running refrigerating pattern or dehumidification mode; if the compressor of off-premises station also off-duty; directly antifreeze process can be carried out when detecting that outlet refrigerant temperature is more than or equal to the first preset temperature; thus ensure that multi-split air conditioner can normally run when starting, improve practicality and the Consumer's Experience of multi-split air conditioner.Wherein, the actual needs that the first preset temperature can run according to multi-split air conditioner is arranged, and preferably, the first preset temperature is 4 DEG C.
According to one embodiment of present invention, described determining unit 404 also for: after starting to carry out described anti-freeze process, determine whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the 3rd preset temperature; And described air-conditioning anti-frost protection system 400 also comprises: the second judging unit 410; when determining that described outlet refrigerant temperature is more than or equal to described 3rd preset temperature; judge whether the time of carrying out described anti-freeze process exceedes the predetermined anti-freeze processing time; wherein; when judged result is for being; open the described expansion valve on the described low pressure valve muffler of arbitrary indoor set; and recover the described compressor frequency of described off-premises station; when judged result is no, proceed described anti-freeze process.
According to the air-conditioning anti-frost protection system 400 of the embodiment of the present invention; after anti-freeze process is carried out to indoor set; if the outlet refrigerant temperature of indoor set has gone up to the 3rd predetermined temperature; and be continued above the predetermined anti-freeze processing time; illustrate that the evaporimeter of indoor set recovers normal condition, now, the compressor frequency of off-premises station can be recovered; to recover normal refrigeration or to remove wet condition, to ensure the safe operation of multi-split air conditioner.Wherein, the actual needs that the 3rd preset temperature can run according to multi-split air conditioner is arranged, and preferably, the 3rd preset temperature is 8 DEG C.
According to one embodiment of present invention, described anti-freeze processing unit 406 also for: after proceeding described anti-freeze process, when described outlet refrigerant temperature is less than or equal to the 4th preset temperature, every first scheduled time, described compressor frequency is reduced the first predetermined value, until described compressor frequency is reduced to predetermined low-limit frequency, and when described outlet refrigerant temperature is more than or equal to the 5th preset temperature, every second scheduled time, described compressor frequency is raised the second predetermined value, until described compressor frequency to be increased to the target frequency of described compressor.
According to the air-conditioning anti-frost protection system 400 of the embodiment of the present invention; carry out in the process of antifreeze process at indoor set; when outlet refrigerant temperature is lower than the 4th preset temperature; compressor frequency can be reduced the first predetermined value every first scheduled time; to ensure normally carrying out of work of thawing, one is made to drag many air-conditionings to recover normal operating conditions as early as possible.When outlet refrigerant temperature is more than or equal to the 5th preset temperature, illustrate that the evaporator temperature of indoor set gos up, the situation of freezing has certain improvement, therefore, compressor frequency can be raised the second predetermined value every second scheduled time, reduce Thawing Rate, make the compressor frequency of off-premises station slowly recover normal condition.Wherein, the actual needs that 4th preset temperature, first scheduled time, the first predetermined value, the 5th preset temperature, second scheduled time, the second predetermined value can be run according to multi-split air conditioner is arranged, wherein, preferably, the 4th preset temperature is 5 DEG C, and first scheduled time was 60s, first predetermined value is generally the size of a compressor gear value, 5th preset temperature is 7 DEG C, and second scheduled time was 120s, and the second predetermined value is generally the size of a compressor gear value.
In the present invention, term " first ", " second ", " the 3rd " " 4th " " the 5th " object only for describing, and instruction or hint relative importance can not be interpreted as; Term " multiple " represents two or more; Term " is connected ", " connection " etc. all should be interpreted broadly, and such as, can be fixedly connected with, also can be removably connect, or connect integratedly; Can be directly be connected, also indirectly can be connected by intermediary.For the ordinary skill in the art, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
More than be described with reference to the accompanying drawings technical scheme of the present invention, when multi-split air conditioner is under refrigeration mode or dehumidification mode, by set temperature sensor on low pressure valve muffler, can be judged by the outlet refrigerant temperature detected that the evaporimeter of indoor set is the need of carrying out anti-freeze process.Wherein, if outlet refrigerant temperature meets preset anti-freeze condition, with regard to frost that explanation evaporimeter has condensed, now, the compressor frequency of off-premises station can be reduced, expansion valve opening is reduced, even be reduced to zero, thus promote evaporating temperature, accelerate frost and thaw, prevent the evaporator freeze of indoor set, improve Consumer's Experience.In addition, the scheme stopping compressor of outdoor unit running is instead of in prior art by the technical program, thus the refrigerant getting back to compressor can be avoided to be in back liquid status for a long time, stop the generation of compressor liquid hammer situation, improve the security of the compressor of outdoor unit of multi-split air conditioner.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. a multi-split air conditioner, is characterized in that, comprising:
Multiple indoor set, each indoor set in described multiple indoor set is connected to the off-premises station of described multi-split air conditioner by low pressure valve muffler;
Temperature sensor, is arranged on described low pressure valve muffler, under refrigeration mode or dehumidification mode, detects the outlet refrigerant temperature of the described indoor set be connected with described low pressure valve muffler, and testing result is sent to described off-premises station;
Described off-premises station, for receiving the described testing result from described temperature sensor, and according to described testing result, judge whether the described outlet refrigerant temperature of described indoor set meets and preset anti-freeze condition, and when described outlet refrigerant temperature meets described default anti-freeze condition, reduce the compressor frequency of described off-premises station.
2. multi-split air conditioner according to claim 1, is characterized in that, described default anti-freeze condition comprises:
Described outlet refrigerant temperature is less than or equal to the first preset temperature in predetermined time interval; Or
Described outlet refrigerant temperature is less than or equal to the second preset temperature; Wherein
Described first preset temperature is greater than described second preset temperature.
3. an air-conditioning anti-frost protection method, for multi-split air conditioner as claimed in claim 1 or 2, is characterized in that, comprising:
Under refrigeration mode or dehumidification mode, detected the outlet refrigerant temperature of multiple indoor sets of described multi-split air conditioner by the temperature sensor on low pressure valve muffler;
According to testing result, determine whether to have in described multiple indoor set the described outlet refrigerant temperature of arbitrary indoor set to meet and preset anti-freeze condition;
When determining that the described outlet refrigerant temperature of described arbitrary indoor set meets described default anti-freeze condition, close the expansion valve on the described low pressure valve muffler of described arbitrary indoor set, and reduce the compressor frequency of the off-premises station of described multi-split air conditioner, to carry out anti-freeze process.
4. air-conditioning anti-frost protection method according to claim 3, is characterized in that, also comprise:
Before the described refrigeration mode of operation or described dehumidification mode, and during the compressor off-duty of described off-premises station, judge whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the first preset temperature;
When judged result is for being, the normal described compressor running described off-premises station,
When judged result is no, directly close the described expansion valve on the described low pressure valve muffler of described arbitrary indoor set, to carry out anti-freeze process.
5. the air-conditioning anti-frost protection method according to claim 3 or 4, is characterized in that, after starting to carry out described anti-freeze process, also comprises:
Determine whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the 3rd preset temperature;
When determining that described outlet refrigerant temperature is more than or equal to described 3rd preset temperature, judge whether the time of carrying out described anti-freeze process exceedes the predetermined anti-freeze processing time;
When judged result is for being, open the described expansion valve on the described low pressure valve muffler of arbitrary indoor set, and recover the described compressor frequency of described off-premises station;
When judged result is no, proceed described anti-freeze process.
6. air-conditioning anti-frost protection method according to claim 5, is characterized in that, after proceeding described anti-freeze process, comprising:
When described outlet refrigerant temperature is less than or equal to the 4th preset temperature, every first scheduled time, described compressor frequency is reduced the first predetermined value, until described compressor frequency is reduced to predetermined low-limit frequency; And
When described outlet refrigerant temperature is more than or equal to the 5th preset temperature, every second scheduled time, described compressor frequency is raised the second predetermined value, until described compressor frequency is increased to the target frequency of described compressor.
7. an air-conditioning anti-frost protection system, for multi-split air conditioner as claimed in claim 1 or 2, is characterized in that, comprising:
Detecting unit, under refrigeration mode or dehumidification mode, detects the outlet refrigerant temperature of multiple indoor sets of described multi-split air conditioner by the temperature sensor on low pressure valve muffler;
Whether determining unit, according to testing result, determine to have in described multiple indoor set the described outlet refrigerant temperature of arbitrary indoor set to meet and preset anti-freeze condition;
Anti-freeze processing unit, when determining that the described outlet refrigerant temperature of described arbitrary indoor set meets described default anti-freeze condition, close the expansion valve on the described low pressure valve muffler of described arbitrary indoor set, and reduce the compressor frequency of the off-premises station of described multi-split air conditioner, to carry out anti-freeze process.
8. air-conditioning anti-frost protection system according to claim 7, is characterized in that, also comprise:
First judging unit, before the described refrigeration mode of operation or described dehumidification mode, and during the compressor off-duty of described off-premises station, judge whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the first preset temperature, wherein, when judged result is for being, the described compressor of the described off-premises station of normal operation, when judged result is no, described expansion valve on the described low pressure valve muffler of the described arbitrary indoor set of direct cut out, to carry out anti-freeze process.
9. the air-conditioning anti-frost protection system according to claim 7 or 8, is characterized in that, described determining unit also for:
After starting to carry out described anti-freeze process, determine whether the described outlet refrigerant temperature of described arbitrary indoor set that described temperature sensor detects is more than or equal to the 3rd preset temperature; And
Described air-conditioning anti-frost protection system also comprises:
Second judging unit, when determining that described outlet refrigerant temperature is more than or equal to described 3rd preset temperature, judge whether the time of carrying out described anti-freeze process exceedes the predetermined anti-freeze processing time, wherein, when judged result is for being, open the described expansion valve on the described low pressure valve muffler of arbitrary indoor set, and recover the described compressor frequency of described off-premises station, when judged result is no, proceed described anti-freeze process.
10. air-conditioning anti-frost protection system according to claim 9, is characterized in that, described anti-freeze processing unit also for:
After proceeding described anti-freeze process, when described outlet refrigerant temperature is less than or equal to the 4th preset temperature, every first scheduled time, described compressor frequency is reduced the first predetermined value, until described compressor frequency is reduced to predetermined low-limit frequency, and when described outlet refrigerant temperature is more than or equal to the 5th preset temperature, every second scheduled time, described compressor frequency is raised the second predetermined value, until described compressor frequency is increased to the target frequency of described compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410748716.XA CN104566645B (en) | 2014-12-08 | 2014-12-08 | Multi-split air conditioner, air-conditioning anti-frost protection method and air-conditioning anti-frost protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410748716.XA CN104566645B (en) | 2014-12-08 | 2014-12-08 | Multi-split air conditioner, air-conditioning anti-frost protection method and air-conditioning anti-frost protection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104566645A true CN104566645A (en) | 2015-04-29 |
| CN104566645B CN104566645B (en) | 2018-06-05 |
Family
ID=53083321
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410748716.XA Active CN104566645B (en) | 2014-12-08 | 2014-12-08 | Multi-split air conditioner, air-conditioning anti-frost protection method and air-conditioning anti-frost protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104566645B (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157172A (en) * | 2015-08-31 | 2015-12-16 | Tcl空调器(中山)有限公司 | Method and device for controlling air conditioner |
| CN107131616A (en) * | 2017-06-13 | 2017-09-05 | 珠海格力电器股份有限公司 | Convertible frequency air-conditioner and its anti-freezing method, device and system |
| CN108224703A (en) * | 2017-12-25 | 2018-06-29 | 青岛海尔空调电子有限公司 | The control method of air-conditioning |
| CN109084443A (en) * | 2018-07-26 | 2018-12-25 | 四川长虹空调有限公司 | A kind of condenser for outdoor unit of air conditioner frosting suppressing method and air-conditioning |
| CN109084444A (en) * | 2018-07-26 | 2018-12-25 | 四川长虹空调有限公司 | A kind of method and air-conditioning inhibiting condenser for outdoor unit of air conditioner frosting |
| CN109210699A (en) * | 2018-09-10 | 2019-01-15 | 青岛海尔空调器有限总公司 | The control method of air-conditioning anti-freeze protection |
| CN111609519A (en) * | 2020-06-04 | 2020-09-01 | 宁波奥克斯电气股份有限公司 | Controller, air-conditioning floor heating system and anti-freezing control method thereof |
| EP3734178A4 (en) * | 2017-12-25 | 2021-05-05 | Qingdao Haier Air-Conditioning Electronic Co., Ltd | Control method for air conditioner |
| CN112762593A (en) * | 2021-01-06 | 2021-05-07 | 青岛海尔空调器有限总公司 | Control method and device for preventing freezing of air conditioner evaporator and cabinet air conditioner |
| CN112963934A (en) * | 2021-03-17 | 2021-06-15 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN113483451A (en) * | 2021-07-12 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method and module for air conditioner operation, air conditioner and computer storage medium |
| CN113503628A (en) * | 2021-07-13 | 2021-10-15 | 珠海格力电器股份有限公司 | Air conditioning unit parameter adjusting method and device, electronic equipment and storage medium |
| CN113739338A (en) * | 2021-09-14 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Liquid collection control method and system of air conditioner and air conditioner |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006322626A (en) * | 2005-05-17 | 2006-11-30 | Daikin Ind Ltd | Air conditioner |
| KR100652799B1 (en) * | 2004-12-20 | 2006-12-01 | 삼성전자주식회사 | Control method for multi type air conditioner |
| CN1991264A (en) * | 2005-12-29 | 2007-07-04 | 三星电子株式会社 | Air-conditioner and control method thereof |
| CN101464033A (en) * | 2007-12-19 | 2009-06-24 | 海尔集团公司 | Antifreeze method and system for indoor unit of air conditioner |
| CN101509692A (en) * | 2009-03-16 | 2009-08-19 | 宁波海诚电器有限公司 | Antifreezing control method of air conditioner evaporator |
| CN103115417A (en) * | 2013-03-19 | 2013-05-22 | 海尔集团公司 | Refrigeration method of low temperature environment air conditioner |
| CN103982980A (en) * | 2014-04-30 | 2014-08-13 | 广东美的制冷设备有限公司 | Anti-freezing control method and device for air conditioner heat exchanger |
-
2014
- 2014-12-08 CN CN201410748716.XA patent/CN104566645B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100652799B1 (en) * | 2004-12-20 | 2006-12-01 | 삼성전자주식회사 | Control method for multi type air conditioner |
| JP2006322626A (en) * | 2005-05-17 | 2006-11-30 | Daikin Ind Ltd | Air conditioner |
| CN1991264A (en) * | 2005-12-29 | 2007-07-04 | 三星电子株式会社 | Air-conditioner and control method thereof |
| CN101464033A (en) * | 2007-12-19 | 2009-06-24 | 海尔集团公司 | Antifreeze method and system for indoor unit of air conditioner |
| CN101509692A (en) * | 2009-03-16 | 2009-08-19 | 宁波海诚电器有限公司 | Antifreezing control method of air conditioner evaporator |
| CN103115417A (en) * | 2013-03-19 | 2013-05-22 | 海尔集团公司 | Refrigeration method of low temperature environment air conditioner |
| CN103982980A (en) * | 2014-04-30 | 2014-08-13 | 广东美的制冷设备有限公司 | Anti-freezing control method and device for air conditioner heat exchanger |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105157172B (en) * | 2015-08-31 | 2018-03-30 | Tcl空调器(中山)有限公司 | The control method and device of air conditioner |
| CN105157172A (en) * | 2015-08-31 | 2015-12-16 | Tcl空调器(中山)有限公司 | Method and device for controlling air conditioner |
| CN107131616A (en) * | 2017-06-13 | 2017-09-05 | 珠海格力电器股份有限公司 | Convertible frequency air-conditioner and its anti-freezing method, device and system |
| WO2019128396A1 (en) * | 2017-12-25 | 2019-07-04 | 青岛海尔空调电子有限公司 | Control method for air conditioner |
| CN108224703A (en) * | 2017-12-25 | 2018-06-29 | 青岛海尔空调电子有限公司 | The control method of air-conditioning |
| US11506436B2 (en) | 2017-12-25 | 2022-11-22 | Qingdao Haier Air-Conditioning Electronic Co., Ltd | Method for controlling freezing of indoor unit, outdoor unit and/or unit connection pipe of air conditioner |
| EP3734178A4 (en) * | 2017-12-25 | 2021-05-05 | Qingdao Haier Air-Conditioning Electronic Co., Ltd | Control method for air conditioner |
| CN109084444A (en) * | 2018-07-26 | 2018-12-25 | 四川长虹空调有限公司 | A kind of method and air-conditioning inhibiting condenser for outdoor unit of air conditioner frosting |
| CN109084443B (en) * | 2018-07-26 | 2021-06-22 | 四川长虹空调有限公司 | Air conditioner outdoor unit condenser frosting inhibition method and air conditioner |
| CN109084443A (en) * | 2018-07-26 | 2018-12-25 | 四川长虹空调有限公司 | A kind of condenser for outdoor unit of air conditioner frosting suppressing method and air-conditioning |
| CN109210699B (en) * | 2018-09-10 | 2020-11-27 | 青岛海尔空调器有限总公司 | Control method for anti-freezing protection of air conditioner |
| CN109210699A (en) * | 2018-09-10 | 2019-01-15 | 青岛海尔空调器有限总公司 | The control method of air-conditioning anti-freeze protection |
| CN111609519A (en) * | 2020-06-04 | 2020-09-01 | 宁波奥克斯电气股份有限公司 | Controller, air-conditioning floor heating system and anti-freezing control method thereof |
| CN111609519B (en) * | 2020-06-04 | 2021-10-19 | 宁波奥克斯电气股份有限公司 | Controller, air-conditioning floor heating system and anti-freezing control method thereof |
| CN112762593A (en) * | 2021-01-06 | 2021-05-07 | 青岛海尔空调器有限总公司 | Control method and device for preventing freezing of air conditioner evaporator and cabinet air conditioner |
| CN112963934B (en) * | 2021-03-17 | 2022-10-04 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN112963934A (en) * | 2021-03-17 | 2021-06-15 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method and device, air conditioner and storage medium |
| CN113483451A (en) * | 2021-07-12 | 2021-10-08 | 珠海格力电器股份有限公司 | Control method and module for air conditioner operation, air conditioner and computer storage medium |
| CN113483451B (en) * | 2021-07-12 | 2022-06-14 | 珠海格力电器股份有限公司 | Control method and module for air conditioner operation, air conditioner and computer storage medium |
| CN113503628B (en) * | 2021-07-13 | 2022-06-14 | 珠海格力电器股份有限公司 | Air conditioning unit parameter adjusting method and device, electronic equipment and storage medium |
| CN113503628A (en) * | 2021-07-13 | 2021-10-15 | 珠海格力电器股份有限公司 | Air conditioning unit parameter adjusting method and device, electronic equipment and storage medium |
| CN113739338A (en) * | 2021-09-14 | 2021-12-03 | 宁波奥克斯电气股份有限公司 | Liquid collection control method and system of air conditioner and air conditioner |
| CN113739338B (en) * | 2021-09-14 | 2022-10-11 | 宁波奥克斯电气股份有限公司 | Liquid collection control method and system of air conditioner and air conditioner |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104566645B (en) | 2018-06-05 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104566645A (en) | Multi-slit air conditioner, air conditioner anti-freezing protection method and air conditioner anti-freezing protection system | |
| CN108317669B (en) | Anti-freezing control method for indoor unit of air conditioner | |
| CN111006355B (en) | Air conditioning unit and running state monitoring method and device thereof | |
| CN107560112B (en) | A kind of control method of air conditioner refrigerating high temperature-proof protection | |
| CN103134142B (en) | Method for detecting complete blockage of air conditioning system | |
| CN111271821B (en) | Four-way valve reversing abnormity control method, storage medium and air conditioner | |
| CN108444034B (en) | Anti-freezing control method for indoor unit of air conditioner and air conditioner | |
| CN104930674A (en) | Defrosting control method and defrosting control device for outdoor unit of air conditioning unit as well as air conditioning system | |
| CN104896711A (en) | Automatic cleaning system, air conditioner and control method | |
| EP3734177B1 (en) | Control method for air conditioner | |
| CN101464033A (en) | Antifreeze method and system for indoor unit of air conditioner | |
| CN110220269B (en) | Anti-freezing control method and system for fan coil and air conditioner | |
| EP3620724A1 (en) | Control method and device for air conditioner | |
| CN101871684A (en) | Defrosting control method of air conditioner | |
| CN203501580U (en) | Anti-freezing protective device for operation of air-cooling heat pump type water chilling unit | |
| CN109210698A (en) | A kind of control method of air-conditioning freeze protection | |
| CN108413564B (en) | Anti-freezing control method for indoor unit of air conditioner and air conditioner | |
| CN211372822U (en) | Anti-freezing heat pump water chiller-heater unit | |
| CN114636225A (en) | Method and device for air conditioner freezing protection, air conditioner and storage medium | |
| CN103791561B (en) | A kind of indoor apparatus of air conditioner | |
| CN105091260A (en) | Anti-freezing protection device and method for air-conditioning unit water system | |
| CN112797688B (en) | Control method and device of ice cold storage system and ice cold storage system | |
| CN109373513B (en) | Control method and device for preventing chassis from being frozen and air conditioner | |
| CN112449672A (en) | Air conditioner | |
| CN114646127B (en) | Air conditioning system and refrigerant circulation abnormality detection method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |