CN109282423B - Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system - Google Patents
Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system Download PDFInfo
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- CN109282423B CN109282423B CN201811101944.2A CN201811101944A CN109282423B CN 109282423 B CN109282423 B CN 109282423B CN 201811101944 A CN201811101944 A CN 201811101944A CN 109282423 B CN109282423 B CN 109282423B
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- 238000004891 communication Methods 0.000 title claims abstract description 87
- 238000004378 air conditioning Methods 0.000 title claims abstract description 54
- 238000011084 recovery Methods 0.000 title claims abstract description 40
- 238000000034 method Methods 0.000 title claims abstract description 25
- 230000002159 abnormal effect Effects 0.000 claims abstract description 13
- 238000010438 heat treatment Methods 0.000 claims description 14
- 238000001816 cooling Methods 0.000 claims description 6
- 230000008859 change Effects 0.000 claims description 5
- 238000001514 detection method Methods 0.000 abstract description 2
- 239000003507 refrigerant Substances 0.000 description 5
- 238000012423 maintenance Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000005856 abnormality Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
Classifications
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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
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Signal Processing (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention discloses a method for detecting communication connection errors of a heat recovery multi-split air conditioning system, which comprises the following steps: step S1: judging whether the communication connection between the air conditioning unit and the pipeline control module is wrong or not by detecting whether the pipe temperature of the indoor unit is abnormal or not when the air conditioning unit operates, and marking the indoor unit with the wrong communication connection; step S2: and switching the control mode of the marked internal machine, and finding out the internal machine with the changed pipe temperature and the control mode from all other internal machines, wherein the found internal machine is the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine. The detection method of the invention can detect the communication connection error in time. The invention also discloses a heat recovery multi-split air conditioning system.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to a method for detecting communication connection errors of a heat recovery multi-split air conditioning system and the heat recovery multi-split air conditioning system.
Background
The heat recovery multi-online air conditioning system is a multi-online system which can realize the refrigeration of part of the indoor units and the heating of part of the indoor units at the same time. As shown in fig. 1, the heat recovery online air conditioning system controls the connection of the inner air pipe and the outer high-pressure air pipe or the outer low-pressure air pipe through the mode converter, so as to realize different modes of operation of the inner unit. When the heat recovery multi-split air conditioning system is installed, the mode converter is integrated with the plurality of pipeline control modules, and the pipeline control modules are respectively used for controlling the states of the electromagnetic valves in the pipelines of the corresponding internal machines, so that the corresponding pipelines are connected. When the indoor unit is installed, the communication line connection between the indoor unit and the pipeline control module in the mode converter is required to be corresponding, so that the pipeline connection state of the indoor unit is ensured to be consistent with the corresponding operation mode.
If the communication line is not connected to the pipeline control module in actual installation, for example, the communication line of the internal unit 1 and the internal unit 2 is connected to the pipeline control module of the other side, the pipeline connection state of the internal unit 1 is actually controlled by the operation mode of the internal unit 2, and it may happen that the operation mode of the internal unit 1 is refrigeration operation and the operation mode of the internal unit 2 is heating operation, but the air outlet temperature of the internal unit 1 is high and the air outlet temperature of the internal unit 2 is low.
The system can not detect the connection error of the communication line, and the abnormality occurs on the air outlet temperature only when the operation mode of the wrongly connected internal machine is not consistent with the pipeline state. If the communication line of the internal machine is wrongly connected when the machine set is installed, the communication line of the internal machine is probably not found immediately. If the user is abnormal in the using process, the comfort level of the user is seriously influenced; and for a multi-split system, the connection between the pipeline control module and the communication line is complex and difficult to check.
Disclosure of Invention
The invention aims to provide a method for detecting communication connection errors of a heat recovery multi-split air-conditioning system and the heat recovery multi-split air-conditioning system, aiming at the defect that the communication connection errors of the heat recovery multi-split air-conditioning system are difficult to check in the prior art.
The embodiment of the invention provides a method for detecting communication connection errors of a heat recovery multi-split air conditioning system, which comprises the following steps:
step S1: judging whether the communication connection between the air conditioning unit and the pipeline control module is wrong or not by detecting whether the pipe temperature of the indoor unit is abnormal or not when the air conditioning unit operates, and marking the indoor unit with the wrong communication connection;
step S2: and switching the control mode of the marked internal machine, and finding out the internal machine with the changed pipe temperature and the control mode from all other internal machines, wherein the found internal machine is the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine.
In the embodiment of the present invention, in step S2, before switching the control mode of the marked internal units, the marked internal units are shut down, and the electronic expansion valves of all the shut-down internal units are controlled to open.
In the embodiment of the present invention, in step S2, the control mode is switched from the cooling shutdown mode to the heating shutdown mode or from the heating shutdown mode to the cooling shutdown mode.
In the embodiment of the present invention, in step S2, when the control mode of the marked internal machine is switched, if the corresponding change value of the pipe inlet temperature of other internal machines within 10 seconds exceeds 5 ℃, it is determined that the internal machine is the internal machine actually controlled by the pipeline control module in communication connection with the marked internal machine.
In the embodiment of the present invention, after the internal machine actually controlled by the pipeline control module, which is in communication connection with the marked internal machine, is found, if the internal machine is not marked, the internal machine is marked, and the internal machine actually controlled by the pipeline control module, which is in communication connection with the internal machine, is found by adopting the method of step S2.
In the embodiment of the present invention, in step S2, after the control mode of the marked internal machine is switched, if an internal machine whose pipe temperature and the control mode are changed in accordance with the change is not found from all other internal machines, the marking of the internal machine is cancelled.
In the embodiment of the present invention, the method further includes step S3: after all the marked internal machines find the internal machines actually controlled by the pipeline control modules which are in communication connection with the marked internal machines, the air conditioning unit outputs the address of each marked internal machine and the address of the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine, and enters a temporary operation mode.
In the embodiment of the present invention, in the temporary operation mode,
when an inner machine of a certain mark is started to run and the inner machine which is in communication connection with the actual pipeline control module is in a shutdown mode, setting the inner machine which is in communication connection with the pipeline control module of the inner machine of the mark as the shutdown mode corresponding to the running mode of the inner machine of the mark;
when the inner machine of a certain mark is started to run and the inner machine which is in communication connection with the actual pipeline control module is in a running mode, the inner machine of the mark can only run in the same mode as the inner machine which is in communication connection with the actual pipeline control module;
if the plurality of marked internal machines are started to operate simultaneously, the machines are started in sequence from large to small according to the capacity of the internal machines.
In the embodiment of the invention, in the temporary operation mode, all marked internal machines indicate that the communication is connected in error on the display screen, and the current operation state is the temporary operation mode.
The embodiment of the invention also provides a heat recovery multi-split air-conditioning system, and the heat recovery multi-split air-conditioning system adopts the method for detecting the communication connection error of the heat recovery multi-split air-conditioning system when detecting the communication connection error.
Compared with the prior art, the heat recovery multi-split air conditioning system and the detection method for the communication connection errors of the heat recovery multi-split air conditioning system judge whether the communication connection between the heat recovery multi-split air conditioning system and the pipeline control module is wrong or not by detecting whether the temperature of the pipe of the indoor unit is abnormal or not when the air conditioning unit operates, and mark the indoor unit with the wrong communication connection; the marked internal machine is switched in a control mode, the pipe temperature and the internal machine which is changed in response to the control mode are found out from all other internal machines, the found internal machine is the internal machine which is actually controlled by the pipeline control module and is in communication connection with the marked internal machine, the connection error of the communication line of the internal machine can be automatically detected without stopping the machine, the correct connection mode is identified, after-sale maintenance is convenient, the normal operation of most internal machines can be ensured as far as possible when the connection error of the communication line of the internal machine is generated, and the use experience of a user is ensured.
Drawings
Fig. 1 is a schematic structural diagram of a heat recovery multi-split air conditioning system according to an embodiment of the present invention, in which:
1-a heat recovery outdoor unit; 2-a liquid pipe; 3-high pressure air pipe; 4-low pressure gas pipe; 5-an internal machine; a 6-mode converter; 7-an electromagnetic valve; 8-inner liquid inlet pipe; 9-inner air pipe.
Fig. 2 is a flowchart of a method for detecting a communication connection error of a heat recovery multi-split air conditioning system according to an embodiment of the present invention.
Fig. 3 is a schematic operation diagram of a heat recovery multi-split air conditioning system in a temporary operation mode according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method for detecting communication connection errors of a heat recovery multi-split air conditioning system, which comprises the steps S1-S3. The following description will be made separately.
Step S1: whether the communication connection between the indoor unit and the pipeline control module is wrong or not is judged by detecting whether the pipe temperature of the indoor unit is abnormal or not when the air conditioning unit operates, and the indoor unit with the wrong communication connection is marked.
The method for detecting the pipe temperature of each air conditioning unit comprises the following steps of:
the control mode of the internal machine is heating operation, the temperature of the inlet pipe of the internal machine is less than the high-pressure temperature of the system to minus 5 ℃, and the pipe temperature is abnormal;
the control mode of the internal machine is that when the internal machine operates in a refrigerating mode, the temperature of an inlet pipe of the internal machine is higher than the low-pressure temperature of the system and is plus 10 ℃, and the temperature of the inlet pipe is abnormal.
And all marked internal machines are numbered according to A1 ~ An in sequence, and the internal machines with all numbers are controlled to stop, so that the internal machines corresponding to the management control modules actually controlled by the internal machines are matched conveniently.
Step S2: and switching the control mode of the marked internal machine, and finding out the internal machine with the changed pipe temperature and the control mode from all other internal machines, wherein the found internal machine is the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine.
It should be noted that, in this step, the control modes of the internal units to be marked are switched one by one, and then the internal units whose pipe temperatures and the control modes are changed are found out from all other internal units. In step S2, before switching the control mode of the marked internal unit, the marked internal unit is shut down, and the electronic expansion valves of all the shut down internal units are controlled to open, so that the refrigerant can circulate in the internal unit, and the state change of the refrigerant caused by switching the pipelines can be detected in time. The control mode is switched from the cooling shutdown mode to the heating shutdown mode or from the heating shutdown mode to the cooling shutdown mode. When the control mode of the marked internal machine is switched, if the corresponding change value of the pipe inlet temperature of other internal machines within 10 seconds exceeds 5 ℃, the temperature of the refrigerant connected into the pipeline is changed rapidly, and the internal machine which is actually controlled by the pipeline control module in communication connection with the marked internal machine can be judged.
After finding out the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine, if the internal machine is not marked, marking the internal machine, and finding out the internal machine actually controlled by the pipeline control module which is in communication connection with the internal machine in step S2.
In step S2, after the control mode of the marked internal machine is switched, if the internal machine whose pipe temperature and the control mode pair are changed are not found from all other internal machines, it is indicated that the abnormal condition of the pipe temperature occurring in the marked internal machine is not caused by a communication connection error, possibly caused by other reasons, and at this time, the marking of the internal machine is cancelled.
Step S3: after all the marked internal machines find the internal machines actually controlled by the pipeline control modules which are in communication connection with the marked internal machines, the air conditioning unit outputs the address of each marked internal machine and the address of the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine, and enters a temporary operation mode.
It should be noted that, after all the marked internal machines find the internal machines actually controlled by the pipeline control module which is in communication connection with the marked internal machines, before the maintenance personnel do not correct the communication connection error, the air conditioning unit operates in a temporary mode, and ensures that most of the internal machines with the communication connection error can also normally operate,
when an inner machine of a certain mark is started to operate and the inner machine which is in communication connection with the actual pipeline control module is in a shutdown mode, the inner machine which is in communication connection with the pipeline control module of the inner machine of the mark is set to be in the shutdown mode corresponding to the operation mode of the inner machine of the mark, because the connection of the refrigerating/heating pipeline is conducted in the corresponding refrigerating/heating shutdown mode, the inner machine of the mark can also adopt the mode corresponding to the operation of the refrigerating/heating pipeline;
when an inner machine of a certain mark is started to operate and the inner machine which is in communication connection with the actual pipeline control module is in an operation mode, the inner machine of the mark can only operate in the same mode as the inner machine which is in communication connection with the actual pipeline control module, because a refrigerant pipeline connected with the inner machine is the same as a refrigerant pipeline connected with the inner machine which is in communication connection with the actual pipeline control module;
if the marked internal machines are started to operate simultaneously, the machines are started in sequence from large to small according to the capacity of the internal machines, and therefore the refrigerating capacity/heating capacity can meet the requirements of each internal machine.
Further, in the temporary operation mode, all the marked internal machines indicate that the communication is connected in error on the display screen, and the current operation state is the temporary operation mode.
The embodiment of the invention also provides a heat recovery multi-split air-conditioning system, and the heat recovery multi-split air-conditioning system adopts the method for detecting the communication connection error of the heat recovery multi-split air-conditioning system when detecting the communication connection error.
In summary, the heat recovery multi-split air conditioning system and the method for detecting the communication connection error of the heat recovery multi-split air conditioning system judge whether the communication connection between the heat recovery multi-split air conditioning system and the pipeline control module is wrong by detecting whether the temperature of the pipe of the indoor unit is abnormal when the air conditioning unit operates, and mark the indoor unit with the wrong communication connection; the marked internal machine is switched in a control mode, the pipe temperature and the internal machine which is changed in response to the control mode are found out from all other internal machines, the found internal machine is the internal machine which is actually controlled by the pipeline control module and is in communication connection with the marked internal machine, the connection error of the communication line of the internal machine can be automatically detected without stopping the machine, the correct connection mode is identified, after-sale maintenance is convenient, the normal operation of most internal machines can be ensured as far as possible when the connection error of the communication line of the internal machine is generated, and the use experience of a user is ensured.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (9)
1. A method for detecting communication connection errors of a heat recovery multi-split air conditioning system is characterized by comprising the following steps:
step S1: judging whether the communication connection between the air conditioning unit and the pipeline control module is wrong or not by detecting whether the pipe temperature of the indoor unit is abnormal or not when the air conditioning unit operates, and marking the indoor unit with the wrong communication connection;
step S2: switching the control mode of the marked internal machine, and finding out the internal machine which has the changed pipe temperature and the control mode from all other internal machines, wherein the found internal machine is the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine;
step S3: after all marked internal machines find the internal machines actually controlled by the pipeline control modules which are in communication connection with the marked internal machines, the air conditioning unit outputs the address of each marked internal machine and the address of the internal machine actually controlled by the pipeline control module which is in communication connection with the marked internal machine, and enters a temporary operation mode;
in the temporary mode of operation, the temporary operating mode,
when an inner machine of a certain mark is started to run and the inner machine which is in communication connection with the actual pipeline control module is in a shutdown mode, setting the inner machine which is in communication connection with the pipeline control module of the inner machine of the mark as the shutdown mode corresponding to the running mode of the inner machine of the mark;
when the inner machine of a certain mark is started to run and the inner machine which is in communication connection with the actual pipeline control module is in a running mode, the inner machine of the mark can only run in the same mode as the inner machine which is in communication connection with the actual pipeline control module;
if the plurality of marked internal machines are started to operate simultaneously, the machines are started in sequence from large to small according to the capacity of the internal machines.
2. The method for detecting the communication connection error of the heat recovery multi-split air conditioning system as claimed in claim 1, wherein the method for detecting whether the temperature of the indoor unit pipe of the air conditioning unit is abnormal is as follows:
the control mode of the internal machine is heating operation, the temperature of the inlet pipe of the internal machine is less than the high-pressure temperature of the system to minus 5 ℃, and the pipe temperature is abnormal;
the control mode of the internal machine is that when the internal machine operates in a refrigerating mode, the temperature of an inlet pipe of the internal machine is higher than the low-pressure temperature of the system and is plus 10 ℃, and the temperature of the inlet pipe is abnormal.
3. The method as claimed in claim 1, wherein in step S2, before switching the control mode of the marked indoor units, the marked indoor units are shut down and the electronic expansion valves of all the shut down indoor units are controlled to open.
4. The method for detecting a communication connection error of a heat recovery multi-split air conditioning system as recited in claim 3, wherein in step S2, the control mode is switched from the cooling shutdown mode to the heating shutdown mode or from the heating shutdown mode to the cooling shutdown mode.
5. The method for detecting the communication connection error of the heat recovery multi-split air conditioning system as claimed in claim 4, wherein in the step S2, when the control mode of the marked indoor unit is switched, if the corresponding variation value of the inlet pipe temperature of other indoor units within 10 seconds exceeds 5 ℃, the indoor unit is determined to be the indoor unit actually controlled by the pipeline control module in communication connection with the marked indoor unit.
6. The method as claimed in claim 1, wherein after finding out the indoor unit actually controlled by the pipeline control module in communication connection with the marked indoor unit, if it is not marked, marking the indoor unit, and finding out the indoor unit actually controlled by the pipeline control module in communication connection with the marked indoor unit in step S2.
7. The method for detecting communication connection errors of a heat recovery multi-split air conditioning system as recited in claim 1, wherein in step S2, after switching the control mode of the marked indoor unit, if an indoor unit whose pipe temperature and control mode pair should change is not found from all other indoor units, the marking of the indoor unit is cancelled.
8. The method as claimed in claim 1, wherein in the temporary operation mode, all marked indoor units indicate a communication connection error on a display screen and a current operation state is the temporary operation mode.
9. A heat recovery multi-split air conditioning system, characterized in that, when detecting a communication connection error, the heat recovery multi-split air conditioning system adopts the method for detecting a communication connection error of a heat recovery multi-split air conditioning system as claimed in any one of claims 1 to 8.
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| CN201811101944.2A CN109282423B (en) | 2018-09-20 | 2018-09-20 | Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system |
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| CN201811101944.2A CN109282423B (en) | 2018-09-20 | 2018-09-20 | Method for detecting communication connection error of heat recovery multi-split air conditioning system and heat recovery multi-split air conditioning system |
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| CN109282423B true CN109282423B (en) | 2019-12-24 |
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| CN111306699A (en) * | 2020-03-03 | 2020-06-19 | 青岛海尔空调器有限总公司 | Method and device for controlling multi-split air conditioner and air conditioner |
| CN111365827A (en) * | 2020-03-25 | 2020-07-03 | 广东美的暖通设备有限公司 | Air conditioner, control method of air conditioner, and computer-readable storage medium |
| CN111595003B (en) * | 2020-05-29 | 2021-09-07 | 广东美的暖通设备有限公司 | Air conditioner detection method and device and air conditioner |
| CN114278975A (en) * | 2021-12-27 | 2022-04-05 | 青岛海信日立空调系统有限公司 | Water multi-connected system |
| CN114811845B (en) * | 2022-03-28 | 2023-11-24 | 青岛海尔空调电子有限公司 | Multi-split system, control method, device, equipment and storage medium thereof |
| CN114838461B (en) * | 2022-05-16 | 2024-02-20 | 美的集团武汉暖通设备有限公司 | Control method of multi-split air conditioner, multi-split air conditioner and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11248234A (en) * | 1998-02-26 | 1999-09-14 | Hitachi Ltd | Air-conditioner |
| JPH11325559A (en) * | 1998-05-20 | 1999-11-26 | Mitsubishi Electric Corp | Method and device for diagnosing failure of air conditioner |
| JP2002147824A (en) * | 2000-11-14 | 2002-05-22 | Hitachi Ltd | Air conditioner |
| CN200979258Y (en) * | 2006-04-12 | 2007-11-21 | 广东美的电器股份有限公司 | Three-pipe heating and recovery air-conditioning system |
| CN102692328B (en) * | 2011-03-24 | 2014-08-27 | 珠海格力电器股份有限公司 | Multi-split air conditioner detection system and method |
| CN103940139A (en) * | 2014-04-15 | 2014-07-23 | 珠海格力电器股份有限公司 | Heat recovery multi-split air conditioner and control method |
| CN105091392B (en) * | 2014-04-15 | 2018-06-05 | 珠海格力电器股份有限公司 | Heat recovery multi-split system and control method thereof |
| CN105066349B (en) * | 2015-08-03 | 2017-10-27 | 珠海格力电器股份有限公司 | Indoor unit mode switching control method of heat recovery multi-split air conditioner and heat recovery multi-split air conditioner |
| CN106440282A (en) * | 2016-11-11 | 2017-02-22 | 珠海格力电器股份有限公司 | Multi-split air conditioner heat recovery system and multi-split air conditioner with same |
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