CN110608514B - Control method of multi-connected air conditioning system and free distribution multi-connected air conditioning system - Google Patents
Control method of multi-connected air conditioning system and free distribution multi-connected air conditioning system Download PDFInfo
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- CN110608514B CN110608514B CN201910889853.8A CN201910889853A CN110608514B CN 110608514 B CN110608514 B CN 110608514B CN 201910889853 A CN201910889853 A CN 201910889853A CN 110608514 B CN110608514 B CN 110608514B
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- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000004378 air conditioning Methods 0.000 title claims abstract description 41
- 230000008859 change Effects 0.000 claims abstract description 56
- 230000008569 process Effects 0.000 claims abstract description 24
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000003044 adaptive effect Effects 0.000 claims description 2
- 239000007788 liquid Substances 0.000 description 8
- 230000002265 prevention Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 230000003584 silencer Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003507 refrigerant Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- 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
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
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- 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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method of a multi-connected air conditioning system, which is characterized in that in the whole machine load phi conversion operation process, a compressor, an outdoor fan and an expansion valve are processed according to the change rate of the whole machine load; the sudden operation change from high to low of the load of the whole machine is the change of the starting number of the internal machine or the change of the wind gear, or both, and in the sudden operation change from high to low of the load of the whole machine, the operation frequency of the compressor is reduced, and simultaneously the rotating speed of the outdoor fan is reduced or stopped as required, or the expansion valve is opened. The situations of complete machine halt, even part damage and the like are avoided, the operation reliability of the complete machine is improved, and the comfort experience of users is also improved.
Description
Technical Field
The invention relates to an air conditioning technology, in particular to a control method of a multi-connected air conditioning system and an air conditioner with the same.
Background
In the application of an air conditioner, the main purpose of high temperature prevention is to prevent parts such as a compressor and the like from being damaged due to overhigh load pressure of the whole machine, most of the existing heat pump air conditioning units are provided with a high temperature prevention control mode, namely, when the temperature of an inner pipe in a heating operation chamber of the unit reaches a certain preset value, the unit enters high temperature prevention protection, and at the moment, the unit is subjected to frequency reduction or air stop to reduce the high pressure of the system.
For the free distribution multi-connection system, the condition that the super-strong gear of a plurality of indoor units is manually operated to be switched to a single low wind gear may exist in the using process of a user, at the moment, the load of the whole machine is suddenly changed, and the pressure may be increased steeply. Due to the hysteresis of the inner pipe temperature detection, the unit may not enter the high temperature protection, and the parts exceed the pressure requirement condition to cause the damage of the parts.
Disclosure of Invention
In view of the above, the present invention provides a control method for a multi-connected air conditioning system, which processes a compressor, an outdoor fan and an expansion valve according to a change rate of a complete machine load Φ during a complete machine load Φ conversion operation process, thereby reducing shutdown processing during the load conversion process, improving user comfort experience, reducing pressure during the load conversion process, and improving complete machine operation reliability.
A control method of a multi-connected air conditioning system is provided, the whole multi-connected air conditioning system comprises an outdoor unit and a plurality of indoor units, the outdoor unit comprises an outdoor heat exchanger, an outdoor fan, a compressor and electronic expansion corresponding to the number of the indoor units, each indoor unit comprises an indoor heat exchanger and an indoor fan, and the indoor heat exchanger, the outdoor fan (2) and the expansion valve are processed according to the change rate of the load phi of the whole air conditioning system in the process of conversion operation of the load phi of the whole air conditioning system:
the calculation formula of the whole machine load is as follows:
Φ＝Σφi，
K＝(Φ1-Φ2)/Φ1
phi is the load of the whole machine;
phi 1-the load of the whole machine before receiving the user command;
phi 2-the overall machine load after receiving the user command;
phi i is the indoor unit load corresponding to the indoor unit i;
k-load change rate before and after receiving user command.
Preferably, the load Σ Φ i of the indoor unit depends on the number of indoor units turned on and/or the wind level of the indoor unit.
Preferably, the user command is a remote control instruction generated by a user through a remote controller.
Preferably, the load change of the whole machine comprises the change of the starting number of the internal machines and the change of the wind gear.
Preferably, when the load change rate before and after receiving the user command is greater than a first preset value, the outdoor fan is stopped; and when the load change rate is greater than a second preset value, quickly opening the electronic expansion valve.
Preferably, in the process of suddenly switching the load of the whole machine from high to low, the running frequency of the compressor is reduced, and simultaneously, the rotating speed of the outdoor fan is reduced or stopped, or the expansion valve is quickly opened.
Preferably, the sudden high-to-low switching operation condition is that the number of indoor machines which are switched into operation from the high-to-low sudden switching operation condition is suddenly reduced and/or the wind level of the indoor fan in operation is changed.
The invention also provides a control method of the multi-connected air conditioning system, which is characterized in that: the method specifically comprises the following steps:
s1: the indoor unit receives a user remote control instruction: part of the indoor units are shut down, or the wind shield of the indoor fan is changed;
s2: the controller calculates the load change rate according to the starting number of the indoor units and the wind gear of the indoor fan before and after a user remote control instruction;
s3: performing adaptive treatment on a compressor, an outdoor fan and an expansion valve according to the change rate of the load phi of the whole machine:
s31: if the load change rate is larger than a first preset value, the outdoor fan is stopped;
s32: and if the load change rate is greater than a second preset value, quickly opening the electronic expansion valve.
Preferably, if the load change rate is greater than a first preset value, the outdoor fan is shut down, the frequency of the compressor is adjusted according to the load of the whole machine, the electronic expansion valve is controlled according to normal logic, and/or if the load change rate is greater than a second preset value, the frequency of the compressor is adjusted according to the load of the whole machine, and the rotating speed of the outdoor fan is reduced or shut down.
The invention also provides a free distribution multi-connected air conditioning system which is provided with a controller and executes the control method of the multi-connected air conditioning system.
The invention provides a control method of a multi-connected air conditioning system, which reduces or stops the rotating speed of an outdoor fan while reducing the frequency of the multi-connected air conditioning system in the load conversion operation process, and simultaneously carries out quick opening processing on an expansion valve, thereby reducing the instantaneous pressure in the load conversion process and improving the reliability of the system.
The following beneficial effects are realized:
1. shutdown processing in the load conversion process is reduced, and the comfort experience of a user is improved;
2. the pressure in the load conversion process is reduced, and the operation reliability of the whole machine is improved.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely some embodiments of the present disclosure, and other drawings may be derived from those drawings by those of ordinary skill in the art without inventive effort.
Fig. 1 is a flowchart illustrating a control method of a multi-connected air conditioning system according to an embodiment of the present invention;
fig. 2 is a schematic view of a multi-connected air conditioner with 4 indoor units according to an embodiment 1 of the present invention;
fig. 3 is a schematic view of a multi-connected air conditioner with 4 indoor units according to an embodiment 2 of the present invention;
in the figure:
1-a filter; 2-outdoor fan; 3-an outdoor heat exchanger; 4-a four-way valve; 5-a compressor; 6-high voltage switch; 7-an exhaust muffler; 8-a gas-liquid separator; rin-the indoor part; rout-outdoor part; RA-a first indoor unit; RB-a second indoor unit; RC-third indoor unit; RD-fourth indoor unit; EA-a first heat exchanger; EB-second heat exchanger; an EC-third heat exchanger; ED — fourth heat exchanger; RA1 — first filter; RB 1-second Filter; RC 1-third filter; RD 1-fourth filter; RA2 — first electronic expansion valve; RB2 — second electronic expansion valve; RC 2-third electronic expansion valve; RD 2-fourth electronic expansion valve;
a1, A2, A3, A4, A5, B1, B2, B3, B4 and B5 are all connecting nodes; a. b, c and d are four interfaces of a four-way valve; s1 — first branch; s2-second branch
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, and "a" and "an" generally include at least two, but do not exclude at least one, unless the context clearly dictates otherwise.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The multi-split air conditioning system is a type of central air conditioner for users, commonly called as 'one split multiple air conditioning', and refers to a primary refrigerant air conditioning system in which one outdoor unit is connected with two or more indoor units through a pipe. The multi-split system is widely applied to small and medium-sized buildings and part of public buildings at present. However, in the process of load conversion operation of the multi-connected air conditioning system, due to improper control of coping with load changes, the comfort experience of users is poor, and the operation reliability of the whole air conditioning system is poor.
In order to solve the problems, the control method of the multi-connected air-conditioning system provided by the invention processes the compressor, the outdoor fan and the expansion valve according to the change rate of the load phi of the whole machine in the load phi conversion operation process of the whole machine.
The following specifically describes embodiments of the present invention with reference to examples.
Example 1:
the multi-split air conditioner is preferably a freely-distributed air conditioner type and is a household freely-distributed multi-split air conditioner type, specifically 1 outdoor unit and a plurality of indoor units, each indoor unit is provided with a corresponding stop valve on the outdoor side, the electronic expansion valves are uniformly arranged on the outdoor units, the connecting pipes are directly connected to the indoor units through the stop valves corresponding to the outdoor units, the maximum number of the indoor units is determined by the number of the stop valves designed by the outdoor units, and the indoor units can be freely selected and combined.
Specifically, as shown in fig. 2, the embodiment takes a multi-connected air conditioner with 4 indoor units as an example for explanation. The air conditioning system of the present embodiment includes an indoor part Rin and an outdoor part Rout, and two connection branches are provided between the indoor part Rin and the outdoor part Rout to form a refrigeration cycle, i.e., a first branch S1 and a second branch S2.
Wherein:
the outdoor part Rout comprises a compressor 5, a four-way valve 4, an outdoor heat exchanger 3 and a filter 1, wherein the outdoor heat exchanger is provided with an outdoor fan 2; an exhaust port of the compressor 5 is connected with a port d of the four-way valve, a port c of the four-way valve is connected with the outdoor heat exchanger 3, and the other end of the outdoor heat exchanger is connected with a first branch S1; the port b of the four-way valve is connected with the suction port of the compressor, and the port a of the four-way valve is connected with the second branch S2.
The indoor part Rin comprises 4 indoor units, a first indoor unit RA, a second indoor unit RB, a third indoor unit RC and a fourth indoor unit RD, and each indoor unit is provided with a heat exchanger with a fan, namely: a first heat exchanger EA provided with a first indoor fan RA3, a second heat exchanger EB provided with a second indoor fan RB3, a third heat exchanger EB provided with a third indoor fan RC3, and a fourth heat exchanger EB provided with a fourth indoor fan RAD 3; each heat exchanger is connected with a filter and a throttling device in series to form a heat exchange branch, and specifically:
the first heat exchanger EA is sequentially connected with a first filter RA1 and a second electronic expansion valve RA2 to form a first indoor heat exchange branch LA;
the second heat exchanger EB is sequentially connected with a second filter RB1 and a second electronic expansion valve RB2 to form a second indoor heat exchange branch LB;
the third heat exchanger EB is sequentially connected with a second filter RC1 and a third electronic expansion valve RC2 to form a third indoor heat exchange branch LC;
the fourth heat exchanger EB forms a fourth indoor heat exchanging branch LD with a fourth filter RD1 and a fourth electronic expansion valve RD2 in this order.
The end sides of the first indoor heat exchange branch LA, the second indoor heat exchange branch LB, the third indoor heat exchange branch LC and the fourth indoor heat exchange branch LD, which are provided with the electronic expansion valves, are connected to the first branch S1 to form connection points a1, a2, A3 and a4, respectively, and the end sides far away from the electronic expansion valves are connected to the second branch S2 to form connection points B1, B2, B3 and B4, respectively.
It is further preferred that a connection point B1 of the first indoor heat exchange branch LA and the second branch S2 is located near a position B5 where a port of the four-way valve a is connected with the second branch S2.
Further preferably, a connection point a1 of the first indoor heat exchange branch LA and the second branch S1 is connected to a position a5 of the first branch S1 near the other end of the outdoor heat exchanger.
The connection points A1, A2, A3 and A4 of the first indoor heat exchange branch LA, the second indoor heat exchange branch LB, the third indoor heat exchange branch LC and the fourth indoor heat exchange branch LD are connected in sequence of A1, A2, A3 and A4 on the branch S1, and the first indoor heat exchange branch LA, the second indoor heat exchange branch LA, the third indoor heat exchange branch LC and the fourth indoor heat exchange branch LD are connected in sequence of the branch S2,
The connection sequence of the connection points B1, B2, B3 and B4 of the second indoor heat exchange branch LB, the third indoor heat exchange branch LC and the fourth indoor heat exchange branch LD is B1, B2, B3 and B4 in sequence, preferably, a bent suction pipeline of the outdoor compressor realizes the gas-liquid separation effect, and the liquid impact of the compressor is prevented.
It should be noted that the fifth filter 1, the first filter RA1, the second filter RB1, and the second filter RC1 are only provided for obtaining a better heat exchange effect, and are not necessarily required.
Example 2:
as shown in fig. 3, in this embodiment, a high-pressure switch 7, an exhaust muffler 6, and a gas-liquid separator 8 are added on the basis of embodiment 2, and the compressor adopts a variable-frequency compressor, specifically: the exhaust silencer 6 and the high-voltage switch 7 are sequentially connected in series between a d port of the four-way valve and the variable-frequency compressor 5, and the gas-liquid separator 8 is connected between a b valve port of the four-way valve and a suction port of the compressor, wherein the high-voltage switch prevents the device from being damaged by overhigh gas pressure, and the exhaust silencer reduces the sound generated when the gas is exhausted, so that better experience is provided for a user; the gas-liquid separator separates gas and liquid to avoid the liquid to block and damage other structures.
Example 3
The following describes the control method of the multi-connected air conditioning system in detail by taking fig. 2-3 as an example (of course, the method of the present invention is not limited to the examples of fig. 2 and 3).
As shown in fig. 1, the air conditioner in this embodiment has a control method of a multi-connected air conditioning system, and during the entire load Φ switching operation, the compressor 5, the outdoor fan 2, and the expansion valves RA2, RB2, RC2, RD2 are processed according to the rate of change of the entire load Φ:
the calculation formula of the whole machine load is as follows:
Φ＝Σφi，
K＝(Φ1-Φ2)/Φ1
phi is the load of the whole machine;
phi 1-the load of the whole machine before receiving the user command;
phi 2-the overall machine load after receiving the user command;
phi i is the load of the indoor unit corresponding to the indoor unit i, and is determined by the indoor and outdoor ambient temperatures corresponding to the indoor unit, the temperature set by a user and the wind gear;
k-load change rate before and after receiving user command.
Preferably, the indoor unit load Σ Φ i depends on the number of indoor units RA, RB, RC, RD turned on and the indoor unit wind level.
Preferably, the user command is a remote control instruction generated by a user through a remote controller.
Preferably, the load change condition of the whole machine comprises the change of the starting number of the internal machines or the change of the wind gear, and in the load change, the load change is the largest, and the condition that various protection shut-down easily occurs is that the load of the whole machine is suddenly switched from high to low: such as a sudden decrease in the number of operating indoor machines and/or a change in the operating indoor fan profile. For example, the fully-opened super-strong gear is changed into the single-opened low-wind gear, that is, the fully-opened super-strong gear of all the indoor units is changed into the low-wind gear of 1 indoor unit, and all other indoor units are turned off.
Preferably, in the process of suddenly switching the load of the whole machine from high to low, the running frequency of the compressor 5 is reduced, and simultaneously, the rotating speed of the outdoor fan 2 is reduced or stopped, and the expansion valve is quickly opened.
Preferably, the operation mode of reducing or stopping the rotation speed of the outdoor fan 2 while reducing the operation frequency of the compressor 5, and performing the rapid expansion process on the expansion valve may be the following two control modes, and may be a separate control mode:
when the load change rate before and after receiving a user command is larger than a first preset value, the indoor unit fan is stopped, the frequency of the compressor is adjusted according to the load of the whole machine, and the electronic expansion valve is controlled according to normal logic;
when the load change rate is larger than a second preset value, the electronic expansion valve is quickly opened, the frequency of the compressor is adjusted according to the load of the whole machine, and the rotating speed of the outdoor fan is reduced or stopped.
The method specifically comprises the following steps:
s1: in the using process of the air conditioner, calculating the current complete machine load phi 1 according to the current indoor machine condition, the starting number of the indoor machines of the air conditioner, the wind gear of an indoor fan for operating the indoor machines and other parameters;
s2: the indoor unit receives a user remote control instruction: partial indoor units are shut down, such as the indoor unit A and the indoor unit B are shut down, or the air gears of the indoor fans RA3/RB3/RC3/RD3 are changed;
s3: the controller recalculates the whole machine load phi 2 after receiving the user instruction according to the indoor machine conditions before and after the user remote control instruction, namely the starting number of the indoor machines of the air conditioner and the wind gear of the indoor fan 2RA3/RB3/RC3/RD3 running the indoor machines, and calculates the load change rate K according to the whole machine loads phi 1 and phi 2 after receiving the user instruction;
s3: the compressor 5, the outdoor fan 2 and the expansion valves RA2, RB2, RC2 and RD2 are processed according to the change rate of the load phi of the whole machine:
s31: comparing the load change rate with a first preset value, and judging whether the outdoor fan 2 is started or stopped; and when the load change rate before and after receiving the user command is greater than a first preset value, the outdoor fan is stopped. At this time, preferably, the frequency of the compressor is adjusted according to the load of the whole machine, and the electronic expansion valve is controlled according to normal logic, that is, according to target operation parameters, generally according to the exhaust temperature or the exhaust superheat degree, and different control strategies are adopted by different manufacturers.
S32: comparing the load change rate with a second preset value, and judging whether the electronic expansion valve is rapidly opened or not; when the load change rate is greater than a second preset value, the electronic expansion valves, namely the electronic expansion valve A and the electronic expansion valve B, are quickly opened; at this time, preferably, the frequency of the compressor is adjusted according to the load of the whole machine, and the rotating speed of the outdoor fan is reduced or stopped. The fan and the electronic expansion valve are separately controlled, the fan is controlled according to a first preset value, and the electronic expansion valve is controlled according to a second preset value without simultaneous limitation. The above-described steps of S31 and S32 may be separately controlled.
The specific first and second preset values can be confirmed according to experiments such as actual operation pressure conditions under different working conditions.
For the above control, the control of the present invention may further include the controller controlling the above process. Namely:
it should be noted that: on the common tractor type, the load change of the whole machine corresponding to the patent only has the wind gear change, and the load change caused by the change of the number of the internal machines is avoided.
In the multi-connected air conditioner with 4 indoor units provided in this embodiment, a control method of a multi-connected air conditioning system is provided, after receiving a user operation signal, the air conditioner determines a change situation of a complete machine load Φ, and performs corresponding processing according to the load change situation. If the load change is overlarge, the running frequency of the unit frequency reduction compressor is reduced, the outdoor fan is forcibly stopped, the rotating speed of the outdoor fan is forcibly stopped, the throttling element expansion valve is rapidly opened, and after a period of time, the fan and the expansion valve are controlled according to the requirement. Through the special control, the pressure of the unit is maintained in a normal operation range when the load of the whole unit suddenly changes. The conditions of complete machine halt, even part damage and the like are avoided, and the operation reliability of the complete machine is improved.
In conclusion, the invention provides a control method of a multi-connected air conditioning system, in the process of the load conversion operation of the whole air conditioning system, a compressor, an outdoor fan and an expansion valve are processed according to the change rate of the load of the whole air conditioning system; the whole machine load is suddenly switched from high to low to change the operation condition from full-open super strong gear to single-open low wind gear, and in the sudden switching operation process from high to low of the whole machine load, the operation frequency of the compressor is reduced, the rotating speed of the outdoor fan is reduced or stopped, and the expansion valve is quickly opened. The control method reduces the shutdown processing of the air conditioner with the control method in the load conversion process, and improves the comfort experience of users; the pressure in the load conversion process is reduced in the same row, and the operation reliability of the whole air conditioner is improved.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (7)
1. A control method of a multi-connected air conditioning system is provided, the whole multi-connected air conditioning system comprises an outdoor unit and a plurality of indoor units, the outdoor unit comprises an outdoor heat exchanger, an outdoor fan, a compressor and electronic expansion corresponding to the number of the indoor units, each indoor unit comprises an indoor heat exchanger and an indoor fan, and the control method is characterized in that: in the whole machine load phi conversion operation process, the compressor (5), the outdoor fan (2) and the expansion valve are processed according to the change rate of the whole machine load phi:
the calculation formula of the whole machine load is as follows:
Φ＝Σφi，
K＝(Φ1-Φ2)/Φ1
phi is the load of the whole machine;
phi 1-the load of the whole machine before receiving the user command;
phi 2-the overall machine load after receiving the user command;
phi i is the indoor unit load corresponding to the indoor unit i;
k is the load change rate before and after receiving the user command;
when the load change rate before and after receiving a user command is larger than a first preset value, the outdoor fan is stopped; and when the load change rate is greater than a second preset value, quickly opening the electronic expansion valve to reduce the running frequency of the compressor (5) and simultaneously reduce or stop the rotating speed of the outdoor fan (2).
2. The control method of a multi-connected air conditioning system as claimed in claim 1, wherein: the load of the indoor units is equal to or greater than the load of the indoor units.
3. The control method of a multi-connected air conditioning system as claimed in claim 1, wherein: the user command is a remote control instruction generated by a user through a remote controller.
4. The control method of a multi-connected air conditioning system as claimed in claim 1, wherein: the load change of the whole machine comprises the change of the starting number of the internal machines and the change of the wind gear.
5. The control method of a multi-connected air conditioning system as claimed in claim 1, wherein: the operation condition is suddenly changed from high to low, the number of the operated indoor machines is suddenly reduced, and/or the wind gear of the indoor fan in operation is changed.
6. A control method of a multi-connected air conditioning system is characterized in that: the method specifically comprises the following steps:
s1: the indoor unit receives a user remote control instruction: part of the indoor units are shut down, or the wind gear of the indoor fan (2) is changed;
s2: the controller calculates the load change rate according to the starting number of the indoor units before and after the remote control instruction of the user and the wind gear of the indoor fan (2);
s3: the method comprises the following steps of performing adaptive processing on a compressor (5), an outdoor fan (2) and an expansion valve according to the change rate of the load phi of the whole machine:
s31: if the load change rate is larger than a first preset value, the outdoor fan is stopped, the frequency of the compressor is adjusted according to the load of the whole machine, and the electronic expansion valve is controlled according to normal logic;
s32: and if the load change rate is greater than a second preset value, quickly opening the electronic expansion valve, and simultaneously reducing the running frequency of the compressor (5) to reduce the rotating speed of the outdoor fan (2) or stop the outdoor fan.
7. A free-distribution multiple air-conditioning system having a controller that performs the control method of the multiple air-conditioning system as set forth in any one of claims 1 to 6.
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| CN111121249B (en) * | 2019-12-26 | 2021-12-10 | 宁波奥克斯电气股份有限公司 | Control method and control device of multi-split system and multi-split system |
| CN111895630B (en) * | 2020-07-31 | 2022-04-22 | 广东Tcl智能暖通设备有限公司 | Air conditioner operation control method, air conditioner and storage medium |
| CN112268348A (en) * | 2020-09-21 | 2021-01-26 | 广东Tcl智能暖通设备有限公司 | Air conditioner control method, system, equipment and storage medium |
| CN113865051B (en) * | 2021-09-30 | 2022-12-09 | 佛山市顺德区美的电子科技有限公司 | Control method of portable air conditioner, portable air conditioner and control device |
| CN113958997B (en) * | 2021-11-08 | 2022-10-28 | 珠海格力电器股份有限公司 | Frequency control method and device of multi-split air conditioner and air conditioning system |
| CN114135929B (en) * | 2021-11-22 | 2023-06-20 | 宁波奥克斯电气股份有限公司 | Control method and control device for multi-connected internal unit and air conditioning unit |
| CN115200182B (en) * | 2022-05-18 | 2023-03-21 | 宁波奥克斯电气股份有限公司 | High-pressure control method and device of multi-connected air conditioner and multi-connected air conditioner |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100438986B1 (en) * | 2002-04-30 | 2004-07-03 | 엘지산전 주식회사 | Remote metering system using multi airconditioner's power metering system |
| JP5054935B2 (en) * | 2006-05-31 | 2012-10-24 | 日立アプライアンス株式会社 | Air conditioner |
| CN102252475B (en) * | 2011-05-06 | 2012-10-10 | 宁波奥克斯电气有限公司 | Method for adjusting electronic expansion valve of turned-off indoor unit during heating of VRV (Varied Refrigerant Volume) air-conditioning system |
| CN102353117B (en) * | 2011-08-04 | 2013-06-05 | 宁波奥克斯电气有限公司 | System protection method for sudden indoor load change of variable refrigerant volume (VRV) air conditioner |
| CN102914025B (en) * | 2012-09-18 | 2014-09-17 | 宁波奥克斯电气有限公司 | Method for controlling direct current frequency conversion air-conditioner while operating in refrigeration mode |
| JP6080721B2 (en) * | 2013-07-31 | 2017-02-15 | 三菱電機株式会社 | Air conditioner |
| CN104879843B (en) * | 2015-06-12 | 2017-06-30 | 广东美的暖通设备有限公司 | Air conditioner controlling device, multi-split air conditioner and air-conditioner control method |
| CN108072204B (en) * | 2017-12-13 | 2020-07-03 | 宁波奥克斯电气股份有限公司 | Multi-connected engine oil balance control method and device |
| CN109323398B (en) * | 2018-09-30 | 2020-10-30 | 广东美的制冷设备有限公司 | Air conditioner control method and device and air conditioner |
| CN109114754B (en) * | 2018-10-19 | 2020-04-28 | 珠海格力电器股份有限公司 | Multi-split variable frequency air conditioner high temperature prevention protection control method |
| CN109579346A (en) * | 2018-11-27 | 2019-04-05 | 南京天加环境科技有限公司 | A kind of multi-connected machine in parallel that refrigerant distributes in due course and its control method |
| CN109945435B (en) * | 2019-03-25 | 2020-10-27 | 宁波奥克斯电气股份有限公司 | Multi-online indoor unit shutdown control method and multi-online unit |
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