CN115200194A - Control method and device for outdoor unit of multi-split air conditioner, air conditioner and medium - Google Patents
Control method and device for outdoor unit of multi-split air conditioner, air conditioner and medium Download PDFInfo
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- CN115200194A CN115200194A CN202210967811.3A CN202210967811A CN115200194A CN 115200194 A CN115200194 A CN 115200194A CN 202210967811 A CN202210967811 A CN 202210967811A CN 115200194 A CN115200194 A CN 115200194A
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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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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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
- F24F11/41—Defrosting; Preventing freezing
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method and a control device for an outdoor unit of a multi-split air conditioner, an air conditioner and a medium, wherein the control method comprises the following steps: carrying out multi-split heating operation; acquiring a discharge pressure parameter, a suction pressure parameter and a condenser temperature parameter of a first outdoor unit to be detected; judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions or not; if any two of the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions, the reversing of a four-way valve of the first outdoor unit is abnormal; and controlling and changing the running state of the first outdoor unit. The invention solves the problem of how to more accurately determine and control the outdoor unit with abnormal reversing of the four-way valve.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device for an outdoor unit of a multi-split air conditioner, an air conditioner and a medium.
Background
With the development of air conditioners, when a multi-split air conditioner operates in parallel heating, due to the fact that the number of outdoor units is large, reversing abnormality of a four-way valve of one outdoor unit often occurs, and therefore the whole system cannot heat.
Therefore, how to more accurately determine and control the outdoor unit with abnormal reversing of the four-way valve becomes a problem which needs to be solved urgently.
Disclosure of Invention
The invention solves the problem of how to more accurately determine and control the outdoor unit with abnormal reversing of the four-way valve.
In order to solve the above problems, the present invention provides a method for controlling an outdoor unit of a multi-split air conditioner, including: carrying out multi-split heating operation; acquiring a discharge pressure parameter, a suction pressure parameter and a condenser temperature parameter of a first outdoor unit to be detected; judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions or not; if any two of the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions, reversing of the four-way valve of the first outdoor unit is abnormal; the operation state of the first outdoor unit is controlled to be changed.
Compared with the prior art, the effect that this scheme can reach: the method comprises the steps of judging whether an exhaust pressure parameter meets a preset condition or not by obtaining an exhaust pressure parameter of a first outdoor unit, meanwhile obtaining a suction pressure parameter of the first outdoor unit, judging whether the suction pressure parameter meets the preset condition or not, meanwhile obtaining a condenser temperature parameter of the first outdoor unit, judging whether the condenser temperature parameter meets the preset condition or not, and judging whether a four-way valve in the first outdoor unit is abnormal in reversing or not by a single judgment result which meets the preset condition, but misjudgment caused by the single condition is easy to occur.
In one embodiment of the present invention, the determining whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter satisfy the preset conditions includes: judging whether the exhaust pressure parameter is greater than or equal to a first preset value or not; when P is present 1 ≥P min When the pressure is + A, the exhaust pressure parameter meets the preset condition; when P is present 1 ＜P min When the pressure is + A, the exhaust pressure parameter does not meet the preset condition; wherein, P 1 I.e. the discharge pressure parameter, P, of the first outdoor unit min Is the minimum discharge pressure in multiple running outdoor units, A is a constant parameter, and the first preset value is P min +A。
Compared with the prior art, the effect that this scheme can reach: when P is 1 ≥P min And when the pressure of the exhaust gas is + A, the exhaust pressure parameter meets a preset condition, namely the exhaust pressure of the current first outdoor unit is obviously higher than the minimum exhaust pressure, and the high-pressure side of the first outdoor unit is not directly communicated with the high-pressure sides of other outdoor units, so that the outdoor unit with abnormal reversing of the four-way valve can be more accurately determined.
In one embodiment of the present invention, the determining whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter satisfy the preset conditions includes: judging whether the suction pressure parameter is less than or equal to a second preset value; when P is present 2 ≤P min When B is higher than the preset value, the suction pressure parameter meets the preset condition; when P is present 2 ＞P min When B is higher than the preset value, the air suction pressure parameter does not meet the preset condition; wherein, P 2 I.e. the suction pressure parameter of the first outdoor unit, B is a constant parameter, and the second preset value is P min -B。
Compared with the prior art, the effect that this scheme can reach: when P is 2 ≤P min B, the suction pressure parameter satisfies the preset condition, which indicates the current first outdoor unitThe suction pressure is lower, at the moment, the low-pressure side of the first outdoor unit communicates with the high-pressure sides of other outdoor units, and the pressure difference is small, so that the outdoor unit with abnormal reversing of the four-way valve can be more accurately determined.
In one embodiment of the invention, the condenser temperature parameters include: the temperature of the inlet pipe of the condenser and the defrosting temperature of the condenser.
Compared with the prior art, the effect that this scheme can reach: through the combination judgment of the condenser inlet pipe temperature and the condenser defrosting temperature, whether the four-way valve is abnormal in reversing can be determined more accurately.
In one embodiment of the present invention, the determining whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter satisfy the preset conditions includes: judging whether the temperature of an inlet pipe of the condenser is higher than the ambient temperature or not; judging whether the defrosting temperature of the condenser is higher than the ambient temperature; and if and only if the condenser inlet pipe temperature is greater than the ambient temperature and the condenser defrosting temperature is greater than the ambient temperature, the condenser temperature parameter meets the preset condition.
Compared with the prior art, the effect that this scheme can reach: when the temperature of the inlet pipe of the condenser is higher than the ambient temperature and the defrosting temperature of the condenser is higher than the ambient temperature, the first outdoor unit is in a refrigerating state at the moment, so that whether the four-way valve is abnormal in reversing can be determined more accurately.
In one embodiment of the present invention, the controlling of changing the operation state of the first outdoor unit includes: stopping operating the compressor and the fan of the first outdoor unit; closing a stop valve of an air pipe and a liquid pipe of the first outdoor unit; the first outdoor unit enters a state to be maintained.
Compared with the prior art, the effect that this scheme can reach: shut down the compressor and the fan of first off-premises station, close the stop valve of the trachea of first off-premises station and liquid pipe simultaneously to when can avoiding first off-premises station fault to shut down, other off-premises stations operation leads to the refrigerant to flow into the outer machine of trouble, thereby reach the first off-premises station that accurate shielding broke down, ensure that other off-premises stations can normally heat among the entire system, so do not influence user's use and experience.
In an embodiment of the present invention, the method for controlling outdoor units of a multi-split air conditioner further includes: the second outdoor unit where the four-way valve which is normally reversed is located enters a strong effect mode; the strong mode comprises the following steps: the maximum operating frequency of the compressor and the fan is increased.
Compared with the prior art, the effect that this scheme can reach: the heating use effect of the user is ensured.
In one embodiment of the present invention, there is provided a control apparatus of a multi-split air conditioner including: the detection module is used for detecting an exhaust pressure parameter, a suction pressure parameter and a condenser temperature parameter of the outdoor unit under the condition that the multi-split air conditioner runs in a heating mode; the judging module is used for judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions or not; and the control module is used for controlling the running state of the outdoor unit under the condition that the four-way valve is in abnormal reversing.
Compared with the prior art, the effect that this scheme can reach: the control device can realize the steps of the control method of any embodiment of the present invention, and thus has the advantageous effects of any of the embodiments described above.
In one embodiment of the present invention, there is provided an air conditioner including: a processor, a memory and a program or instructions stored on the memory and executable on the processor, the program or instructions when executed by the processor implementing the steps of the control method as claimed in any one of the above.
Compared with the prior art, the effect that this scheme can reach: the air conditioner in this embodiment can execute the control method in any of the embodiments described above, so that the air conditioner has the beneficial effects of any of the embodiments described above, which are not described herein again, and the processor can run all the instructions and programs in the memory, so that the air conditioner can respond quickly and with high precision when implementing the instructions.
In one embodiment of the invention, there is provided a readable storage medium on which a program or instructions are stored, which when executed by a processor, implement the steps of the control method as any one of the above.
Compared with the prior art, the effect that this scheme can reach: the readable storage medium is used for implementing the steps of the control method according to any embodiment of the present invention, so that the readable storage medium has all the advantages of the method according to any embodiment of the present invention, and further description is omitted here.
Drawings
Fig. 1 is a flowchart illustrating steps of a method for controlling outdoor units of a multi-split air conditioner according to some embodiments;
fig. 2 is a schematic diagram illustrating an outdoor unit of a multi-split air conditioner according to some embodiments;
FIG. 3 is a schematic diagram of the control device;
fig. 4 is a schematic structural diagram of an air conditioner.
Description of the reference numerals:
100. a control device; 101. a detection module; 102. a judgment module; 103. a control module; 200. an air conditioner; 201. a processor; 202. a memory.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments of the present invention are described in detail.
The first embodiment is as follows:
referring to fig. 1, the present embodiment provides a method for controlling an outdoor unit of a multi-split air conditioner, including: s10, carrying out multi-split heating operation; step 20, acquiring a discharge pressure parameter, a suction pressure parameter and a condenser temperature parameter of the first outdoor unit to be detected; step S30, judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions; step S401, if any two of the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions, the reversing of a four-way valve of the first outdoor unit is abnormal; step S50 controls to change the operation state of the first outdoor unit.
In this embodiment, it should be noted that the step S401 is only performed if any two of the discharge pressure parameter, the suction pressure parameter and the condenser temperature parameter satisfy the preset conditions, and if only one of the discharge pressure parameter, the suction pressure parameter and the condenser temperature parameter satisfies the preset conditions, the step S402 is performed, and if the four-way valve of the first outdoor unit is normally switched, the operation state of the first outdoor unit does not need to be adjusted.
The control method in the embodiment is suitable for the working condition that the multi-split air conditioner is in heating operation. Meanwhile, when a plurality of outdoor units are connected in parallel for heating operation, as shown in fig. 2, the outdoor unit comprises a first outdoor unit, a second outdoor unit and a third outdoor unit, wherein the outdoor units correspond to the indoor units one by one, the outdoor unit corresponds to the indoor unit one, the outdoor unit two corresponds to the indoor unit two, and the outdoor unit three corresponds to the indoor unit three. Specifically, the first outdoor unit in this embodiment may be any one of the first outdoor unit, the second outdoor unit, and the third outdoor unit.
When a plurality of outdoor units are connected in parallel for heating, if the four-way valve of one outdoor unit is abnormally reversed, the abnormal outdoor unit is equivalent to operate in a cooling state, the outdoor unit is referred to as a first outdoor unit in the embodiment, and the low-pressure side of the first outdoor unit is communicated with the high-pressure sides of the other outdoor units which normally operate, so that the discharge pressure parameter of the first outdoor unit at the moment is increased, meanwhile, the suction pressure parameter of the first outdoor unit is reduced, and similarly, the temperature parameter of the condenser is changed.
Therefore, in this embodiment, the discharge pressure parameter of the first outdoor unit is obtained to determine whether the discharge pressure parameter meets the preset condition, and at the same time, the suction pressure parameter of the first outdoor unit is obtained to determine whether the suction pressure parameter meets the preset condition, and at the same time, the condenser temperature parameter of the first outdoor unit is obtained to determine whether the condenser temperature parameter meets the preset condition, and a single determination result meeting the preset condition may indicate that the four-way valve is abnormally reversed, but erroneous determination caused by a single condition is likely to occur.
Further, the present embodiment can combine the determination results of the three above, that is, the required exhaust pressure parameter meets the preset condition, the suction pressure parameter meets the preset condition, and the condenser temperature parameter meets the preset condition, and the three parameters need to be met at the same time, so that the accuracy of the detection result can be further improved.
The second embodiment:
in this embodiment, determining whether the exhaust pressure parameter, the suction pressure parameter, and the condenser temperature parameter satisfy the preset conditions includes: judging whether the exhaust pressure parameter is greater than or equal to a first preset value or not; when P is present 1 ≥P min When the pressure is + A, the exhaust pressure parameter meets the preset condition; when P is present 1 ＜P min When the pressure is + A, the exhaust pressure parameter does not meet the preset condition; wherein, P 1 I.e. the discharge pressure parameter, P, of the first outdoor unit min Is the minimum discharge pressure in multiple running outdoor units, A is a constant parameter, and the first preset value is P min +A。
Wherein, the preset conditions in this embodiment include: judging whether the exhaust pressure parameter is greater than or equal to a first preset value, wherein the first preset value is a factory preset value and can be set automatically according to specific use conditions of a user, and preferably, the first preset value in the embodiment is P min + A, A is a constant parameter, and A recommends values of [0.3,0.6]Closed interval, unit MPa, when P 1 ≥P min And + a, the discharge pressure parameter satisfies the preset condition, that is, at this time, it indicates that the discharge pressure of the current first outdoor unit is significantly higher than the minimum discharge pressure, and the high-pressure side of the first outdoor unit is not directly communicated with the high-pressure sides of the other outdoor units, so that it may indicate that the four-way valve of the first outdoor unit is in an abnormal reversing state.
Example three:
in this embodiment, determining whether the exhaust pressure parameter, the suction pressure parameter, and the condenser temperature parameter satisfy the preset conditions includes: judging whether the suction pressure parameter is less than or equal to a second preset value; when P is present 2 ≤P min When B is higher than the preset value, the suction pressure parameter meets the preset condition; when P is present 2 ＞P min When B is higher than the preset value, the air suction pressure parameter does not meet the preset condition; wherein, P 2 I.e. the suction pressure parameter of the first outdoor unit, B is a constant parameter, and the second preset value is P min -B。
In this embodiment, the preset conditions further include: judging whether the suction pressure parameter is less than or equal to a second preset value, wherein similarly, the second preset value is a factory preset value and can be set according to the use condition of the user min B and B are constant parameters which are obtained by multiple experiments as well as constant parameter A, and the value range of B is preferably [0.05,0.25 ]]Closed interval, unit MPa, when P 2 ≤P min When the suction pressure parameter meets the preset condition B, the suction pressure parameter indicates that the suction pressure of the first outdoor unit is lower, the low-pressure side of the first outdoor unit communicates with the high-pressure sides of other outdoor units at the moment, the pressure difference is small, and therefore the reversing abnormality of the four-way valve of the first outdoor unit can be indicated at the moment.
Example four:
in this embodiment, the condenser temperature parameters include: the temperature of the inlet pipe of the condenser and the defrosting temperature of the condenser.
Through the combination judgment of the condenser inlet pipe temperature and the condenser defrosting temperature, whether the four-way valve is abnormal in reversing can be determined more accurately.
Wherein, judge whether exhaust pressure parameter, suction pressure parameter and condenser temperature parameter satisfy the preset condition, include: judging whether the inlet pipe temperature of the condenser is higher than the ambient temperature or not; judging whether the defrosting temperature of the condenser is higher than the ambient temperature; and if and only if the condenser inlet pipe temperature is greater than the ambient temperature and the condenser defrosting temperature is greater than the ambient temperature, the condenser temperature parameter meets the preset condition.
In this embodiment, the preset conditions further include: and when the condenser inlet pipe temperature is greater than the ambient temperature and the condenser defrosting temperature is greater than the ambient temperature, the first outdoor unit is in a refrigerating state at the moment, and the four-way reversing valve is abnormal in reversing.
Example five:
in this embodiment, the controlling and changing the operation state of the first outdoor unit includes: stopping operating the compressor and the fan of the first outdoor unit; closing a stop valve of an air pipe and a liquid pipe of the first outdoor unit; the first outdoor unit enters a state to be maintained.
In this embodiment, in combination with the above embodiments, the first outdoor unit with the abnormal reversing of the four-way valve can be accurately determined and determined, and then the first outdoor unit with the abnormal reversing of the four-way valve needs to be accurately controlled, so that the use of other normally-operated outdoor units is not affected while the operation state of the first outdoor unit is changed, and the heating requirement of a user is ensured.
Wherein particularly, when the cross valve switching-over of first off-premises station is unusual, need shut down the compressor and the fan of first off-premises station this moment, close the stop valve of the trachea of first off-premises station and liquid pipe simultaneously, the purpose then is the break-make of control trachea and liquid pipe, thereby when avoiding first off-premises station fault shutdown, other off-premises stations operation leads to the refrigerant to flow into the outer machine of trouble, thereby reach the first off-premises station that accurate shielding broke down, ensure that other off-premises stations can normally heat among the entire system, from not influencing user's use experience. Preferably, the stop valve of trachea and liquid pipe selects trachea solenoid valve and liquid pipe solenoid valve.
Further, when the first outdoor unit enters a state to be maintained, the controller sends fault information, or, for example, the line controller displays a fault code or remotely pushes the fault information, thereby prompting after-sales maintenance.
Further, after the first outdoor unit is maintained, the control of the outdoor unit of the multi-split air conditioner in this embodiment is exited after the power is turned off or the outdoor unit is reset (function key or monitoring software), the air pipe solenoid valve and the liquid pipe solenoid valve of the first outdoor unit are opened, the compressor, the fan and the four-way valve of the first outdoor unit are controlled in a conventional manner, that is, the first outdoor unit and other outdoor units whose four-way valves are normally switched are controlled in the same manner.
Example six:
in this embodiment, the method for controlling the outdoor units of the multi-split air conditioner further includes: the second outdoor unit where the four-way valve which is normally reversed is located enters a strong effect mode; the robust mode includes: the maximum operating frequency of the compressor and the fan is increased.
It should be noted that the second outdoor unit represents an outdoor unit that normally operates and an outdoor unit that can indicate that the four-way valve is normally switched. In this embodiment, since the first outdoor unit with abnormal reversing enters the maintenance state, the heating requirement of the user is affected by the conventional setting, and therefore in this embodiment, the second outdoor unit enters the high efficiency mode, the maximum operating frequency of the compressor and the fan of the second outdoor unit is increased, preferably, the maximum operating frequency is increased by 10%, so that the maximum capacity output is improved, and the heating use effect of the user is ensured.
Example seven:
referring to fig. 3, the present embodiment provides a control device 100 of a multi-split air conditioner 200, including: the detection module 101 is used for detecting a discharge pressure parameter, a suction pressure parameter and a condenser temperature parameter of the outdoor unit under the condition that the multi-split air conditioner runs in a heating mode; the judging module 102, the judging module 102 is used for judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet the preset conditions; and the control module 103 is used for controlling the running state of the outdoor unit under the condition that the four-way valve is in abnormal reversing.
Example eight:
referring to fig. 4, the present embodiment provides an air conditioner 200, the air conditioner 200 including: a processor 201, a memory 202 and a program or instructions stored on the memory 202 and executable on the processor 201, which program or instructions, when executed by the processor 201, implement the steps of the control method as any one of the above.
Since the air conditioner 200 in this embodiment can execute the control method of any one of the embodiments, the air conditioner 200 in this embodiment can implement the solutions and beneficial effects of any one of the embodiments, and is not described herein again.
Example nine:
the present embodiments provide a readable storage medium on which a program or instructions are stored, which when executed by a processor implement the steps of the control method as described in any one of the above.
The readable storage medium may be any combination of one or more readable media, which may be a readable signal medium or a readable storage medium, and may include, for example and without limitation, an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any combination thereof. More specific examples of the readable storage medium include: an electrical connection having one or more wires, a portable diskette, a hard disk, a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disc read-only memory, an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected by one skilled in the art without departing from the spirit and scope of the invention, as defined in the appended claims.
Claims (10)
1. A method for controlling an outdoor unit of a multi-split air conditioner, comprising:
the multi-connected machine is in hot operation;
acquiring a discharge pressure parameter, a suction pressure parameter and a condenser temperature parameter of a first outdoor unit to be detected;
judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions or not;
if any two of the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet the preset conditions, reversing of a four-way valve of the first outdoor unit is abnormal;
and controlling to change the running state of the first outdoor unit.
2. The control method according to claim 1, wherein the determining whether the exhaust pressure parameter, the suction pressure parameter, and the condenser temperature parameter satisfy preset conditions includes:
judging whether the exhaust pressure parameter is greater than or equal to a first preset value;
when P is present 1 ≥P min When the pressure is + A, the exhaust pressure parameter meets the preset condition;
when P is 1 ＜P min When the pressure is + A, the exhaust pressure parameter does not meet the preset condition;
wherein, the P 1 I.e. the discharge pressure parameter, P, of the first outdoor unit min The minimum exhaust pressure in a plurality of running outdoor units, A is a constant parameter, and the first preset value is P min +A。
3. The control method according to claim 2, wherein the determining whether the exhaust pressure parameter, the suction pressure parameter, and the condenser temperature parameter satisfy preset conditions includes:
judging whether the suction pressure parameter is less than or equal to a second preset value;
when P is 2 ≤P min B, the suction pressure parameter meets the preset condition;
when P is 2 ＞P min B, the suction pressure parameter does not meet the preset condition;
wherein, the P is 2 The suction pressure parameter of the first outdoor unit, B is a constant parameter, and the second preset value is P min -B。
4. The control method of claim 1, wherein the condenser temperature parameter comprises:
the temperature of the inlet pipe of the condenser and the defrosting temperature of the condenser.
5. The control method according to claim 4, wherein the determining whether the exhaust pressure parameter, the suction pressure parameter, and the condenser temperature parameter satisfy preset conditions includes:
judging whether the inlet pipe temperature of the condenser is higher than the ambient temperature or not; and the combination of (a) and (b),
judging whether the defrosting temperature of the condenser is higher than the ambient temperature or not;
and if and only if the condenser inlet pipe temperature is greater than the ambient temperature and the condenser defrosting temperature is greater than the ambient temperature, the condenser temperature parameter meets the preset condition.
6. The control method of claim 1, wherein the controlling changes an operation state of the first outdoor unit, comprising:
stopping operating the compressor and the fan of the first outdoor unit;
closing a stop valve of an air pipe and a liquid pipe of the first outdoor unit;
and the first outdoor unit enters a state to be maintained.
7. The control method according to any one of claims 1 to 6, characterized by further comprising:
the second outdoor unit where the four-way valve is normally reversed enters a strong effect mode;
the robust mode includes: the maximum operating frequency of the compressor and the fan is increased.
8. A control apparatus of a multi-split air conditioner, comprising:
the detection module is used for detecting an exhaust pressure parameter, a suction pressure parameter and a condenser temperature parameter of the outdoor unit under the condition that the multi-split air conditioner runs in a heating mode;
the judging module is used for judging whether the exhaust pressure parameter, the suction pressure parameter and the condenser temperature parameter meet preset conditions or not;
and the control module is used for controlling the running state of the outdoor unit under the condition that the four-way valve is in abnormal reversing.
9. An air conditioner, characterized in that the air conditioner comprises:
a processor, a memory and a program or instructions stored on the memory and executable on the processor, which when executed by the processor implement the steps of the control method of any one of claims 1 to 7.
10. A readable storage medium, characterized in that it stores thereon a program or instructions which, when executed by a processor, implement the steps of the control method according to any one of claims 1 to 7.
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| CN202210967811.3A CN115200194B (en) | 2022-08-12 | 2022-08-12 | Control method and device of outdoor unit of multi-split air conditioner, air conditioner and medium |
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| CN202210967811.3A CN115200194B (en) | 2022-08-12 | 2022-08-12 | Control method and device of outdoor unit of multi-split air conditioner, air conditioner and medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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