CN115789864A - Multi-connected air conditioner outdoor unit defrosting control method and device, air conditioner and storage medium - Google Patents
Multi-connected air conditioner outdoor unit defrosting control method and device, air conditioner and storage medium Download PDFInfo
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- CN115789864A CN115789864A CN202211580225.XA CN202211580225A CN115789864A CN 115789864 A CN115789864 A CN 115789864A CN 202211580225 A CN202211580225 A CN 202211580225A CN 115789864 A CN115789864 A CN 115789864A
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- 238000010257 thawing Methods 0.000 title claims abstract description 138
- 238000000034 method Methods 0.000 title claims abstract description 54
- 238000003860 storage Methods 0.000 title claims description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 97
- 230000001276 controlling effect Effects 0.000 claims description 18
- 238000004590 computer program Methods 0.000 claims description 10
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 description 5
- 230000009471 action Effects 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 230000002035 prolonged effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000009467 reduction Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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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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Abstract
The invention provides a defrosting control method, device and equipment for an outdoor unit of a multi-connected air conditioner, relates to the technical field of air conditioners, and is designed for solving the problem that a compressor is damaged due to excessive increase of suction load. The multi-connected air conditioner outdoor unit defrosting control method is applied to a multi-connected air conditioner, the multi-connected air conditioner is provided with a heating outdoor unit and a defrosting outdoor unit, and the multi-connected air conditioner outdoor unit defrosting control method comprises the following steps: controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state; acquiring the exhaust pressure of a compressor of a heating outdoor unit or the suction pressure of a compressor of a defrosting outdoor unit; and if the exhaust pressure of the compressor of the heating outdoor unit or the suction pressure of the compressor of the defrosting outdoor unit is greater than the preset pressure value, controlling the compressor of the heating outdoor unit to reduce the rotating speed by a rotating speed adjusting value. The defrosting control method for the multi-connected air conditioner outdoor unit can prevent the suction pressure of the compressor of the defrosting outdoor unit from being damaged due to excessive increase of the suction load.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device for an outdoor unit of a multi-connected air conditioner, an air conditioner and a storage medium.
Background
When a multi-connected air conditioner connected with a plurality of outdoor units performs heating operation, in order to prevent the indoor units from stopping heating operation, the four-way valve of the outdoor unit which needs defrosting is switched to refrigeration only to defrost.
However, when defrosting is performed by the above method, a compressor of a corresponding defrosting outdoor unit (hereinafter, referred to as a defrosting outdoor unit) may suck a high-pressure gaseous refrigerant discharged from a compressor of an outdoor unit (hereinafter, referred to as a heating outdoor unit) performing a heating operation. There is a risk that the suction load is excessively increased to cause breakage of the compressor.
Although there is a related art in which an expansion valve is provided on a suction pipe of a compressor to reduce pressure of a refrigerant of a defrosting outdoor unit, the related art needs an expansion valve with high cost, which increases the overall cost of an air conditioner.
Disclosure of Invention
The invention aims to provide a defrosting control method for an outdoor unit of a multi-connected air conditioner, which aims to solve the technical problem that a compressor is damaged due to excessive increase of suction load.
In order to solve the technical problems, the invention provides a defrosting control method for an outdoor unit of a multi-connected air conditioner, which is applied to a multi-connected air conditioner, wherein the multi-connected air conditioner comprises a heating outdoor unit and a defrosting outdoor unit, and the defrosting control method for the outdoor unit of the multi-connected air conditioner comprises the following steps:
controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
acquiring the exhaust pressure of a compressor of a heating outdoor unit or the suction pressure of a compressor of a defrosting outdoor unit;
and if the exhaust pressure of the compressor of the heating outdoor unit or the suction pressure of the compressor of the defrosting outdoor unit is greater than a preset pressure value, controlling the compressor of the heating outdoor unit to reduce the rotating speed by a rotating speed adjusting value.
The defrosting control method for the outdoor unit of the multi-connected air conditioner has the beneficial effects that:
the defrosting outdoor unit compressor is used for defrosting the outdoor unit compressor, and the defrosting outdoor unit compressor is used for supplying air to the defrosting outdoor unit compressor.
In an optimal technical scheme, the preset pressure value is located in a preset pressure interval of a target pressure value floating fluctuation value, and an upper limit value of the preset pressure interval is smaller than an upper limit value of suction pressure of the compressor.
The preset pressure value is located in the preset pressure interval, and the upper limit value of the preset pressure interval is smaller than the upper limit value of the suction pressure of the compressor, so that the suction pressure of the compressor of the defrosting outdoor unit is smaller than the upper limit value of the suction pressure of the compressor, the compressor of the defrosting outdoor unit is located in the working range with proper suction load, and the service life of the compressor is prolonged.
In a preferred technical scheme, the defrosting control method for the outdoor unit of the multi-connected air conditioner further comprises the following steps: and if the exhaust pressure of the compressor of the heating outdoor unit or the suction pressure of the compressor of the defrosting outdoor unit is smaller than the lower limit value of the preset pressure interval, controlling the compressor of the heating outdoor unit to increase the rotating speed by a rotating speed adjusting value.
The rotation speed of the heating outdoor unit compressor is increased when the exhaust pressure of the heating outdoor unit compressor or the suction pressure of the defrosting outdoor unit compressor is set to be smaller than the lower limit value of the preset pressure interval, accordingly, the exhaust pressure of the heating outdoor unit compressor can be increased, the suction pressure of the defrosting outdoor unit compressor can be further improved, and the problem that defrosting capacity is insufficient due to the fact that the suction pressure of the defrosting outdoor unit compressor is too much reduced is solved.
In a preferred technical scheme, the target pressure value is 9bar-11bar.
In a preferred technical scheme, the fluctuation value is 1.5bar-2.5bar.
In the preferable technical scheme, the rotating speed adjusting value is 5% -15% of the maximum rotating speed of the compressor.
In a preferred technical scheme, the defrosting control method for the outdoor unit of the multi-connected air conditioner further comprises the following steps: and if the exhaust pressure of the heating outdoor unit compressor or the suction pressure of the defrosting outdoor unit compressor is more than or equal to the lower limit value of a preset pressure interval and less than or equal to a preset pressure value, keeping the rotating speed of the heating outdoor unit compressor unchanged.
Because the work of the heating outdoor unit compressor is not absolutely stable, the discharge pressure of the heating outdoor unit compressor fluctuates to a certain extent, therefore, a preset pressure interval is set, and when the discharge pressure of the heating outdoor unit compressor or the suction pressure of the defrosting outdoor unit compressor is in the interval, although the discharge pressure or the suction pressure of the defrosting outdoor unit compressor floats, the rotation speed of the heating outdoor unit compressor is not adjusted as long as the discharge pressure or the suction pressure of the heating outdoor unit compressor does not exceed the upper limit value or the lower limit value of the preset pressure interval, so that the service life of the compressor is prevented from being shortened due to frequent speed change.
The second object of the present invention is to provide a multiple air conditioner outdoor unit defrosting control device to solve the technical problem of compressor damage caused by excessive increase of suction load.
The invention provides a defrosting control device for an outdoor unit of a multi-connected air conditioner, which comprises:
the switching module is used for controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
the acquiring module is used for acquiring the exhaust pressure of a compressor of the heating outdoor unit or the suction pressure of a compressor of the defrosting outdoor unit;
and the speed regulation module is used for controlling the heating outdoor unit compressor to reduce the rotating speed by a rotating speed regulation value if the exhaust pressure of the heating outdoor unit compressor or the air suction pressure of the defrosting outdoor unit compressor is greater than a preset pressure value.
A third object of the present invention is to provide an air conditioner to solve the problem of damage to the compressor caused by excessive increase of the suction load.
The air conditioner provided by the invention comprises a computer readable storage medium and a processor, wherein the computer readable storage medium stores a computer program, and the computer program is read by the processor and runs to realize the control method.
A fourth object of the present invention is to provide a computer readable storage medium to solve the technical problem of compressor breakage caused by excessive increase of suction load.
A computer-readable storage medium, in which a computer program is stored which, when read and executed by a processor, implements the control method described above.
The defrosting control device of the multi-connected air conditioner outdoor unit, the air conditioner and the computer readable storage medium can achieve the same technical effect as the defrosting control method of the multi-connected air conditioner outdoor unit.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings needed to be used in the description of the embodiments or the background art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic diagram illustrating an entity apparatus of a defrosting control method for an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic flowchart of a defrosting control method for an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention;
fig. 3 is a schematic flowchart illustrating another defrosting control method for an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic flowchart illustrating another defrosting control method for outdoor units of a multi-connected air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic structural view illustrating a defrosting control device of an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention.
Description of the reference numerals:
101-an outdoor heat exchanger; 102-heating outdoor machine compressor; 103-defrosting outdoor machine compressor; 104-a four-way valve;
501-switching module; 502-an acquisition module; 503-speed regulating module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a schematic diagram of an entity device for applying a defrosting control method for an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention. The multi-connected air conditioner comprises a plurality of outdoor units, each outdoor unit comprises a compressor, an outdoor heat exchanger and a four-way valve, wherein an air inlet and an air outlet of the compressor are respectively connected with the four-way valve. When the whole multi-connected outdoor unit is in a heating mode, if the four-way valve conducts the air inlet of the compressor with the main pipeline and conducts the air outlet of the compressor with the outdoor heat exchanger, the outdoor heat exchanger is defrosted. When the whole multi-connected outdoor unit is in a heating mode, if the four-way valve conducts the exhaust port of the compressor with the main pipeline and conducts the suction port of the compressor with the outdoor heat exchanger, the outdoor unit is in a heating state. The heat generated by the outdoor unit can be utilized to defrost the outdoor unit needing defrosting.
Pressure sensors are arranged between the air inlet of each compressor and the four-way valve and between the air outlet of the compressor and the four-way valve so as to monitor the corresponding exhaust pressure or suction pressure of the compressor.
If the outdoor heat exchanger of one of the outdoor units is frosted, the outdoor unit is a defrosting outdoor unit, correspondingly, the compressor of the outdoor unit is a defrosting outdoor unit compressor, and the suction pressure detected by the pressure sensor outside the air inlet of the compressor of the outdoor unit is the suction pressure Ps of the defrosting outdoor unit compressor. Correspondingly, the other outdoor unit is a heating outdoor unit, the compressor of the outdoor unit is a heating outdoor unit compressor, and the discharge pressure detected by the pressure sensor outside the air outlet of the compressor of the outdoor unit is the discharge pressure Pd of the heating outdoor unit compressor.
Fig. 2 is a schematic flowchart of a defrosting control method for an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention; as shown in fig. 2, the defrosting control method of the outdoor unit of the multi-connected air conditioner may be applied to the multi-connected air conditioner, and the method includes:
s210, controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
s220, acquiring the exhaust pressure Pd of a compressor of a heating outdoor unit or the suction pressure Ps of a compressor of a defrosting outdoor unit;
and S230, if the discharge pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is greater than the preset pressure value Pi, controlling the compressor of the heating outdoor unit to reduce the rotating speed by the rotating speed adjusting value.
The defrosting outdoor machine compressor is damaged due to the fact that the air suction pressure Ps of the defrosting outdoor machine compressor is too high, so that when the exhaust pressure Pd of the heating outdoor machine compressor or the air suction pressure Ps of the defrosting outdoor machine compressor is larger than a preset pressure value Pi, the rotating speed of the heating outdoor machine compressor is reduced, the exhaust pressure Pd of the heating outdoor machine compressor can be reduced, namely the pressure of a pipeline between the heating outdoor machine compressor and the defrosting outdoor machine compressor is reduced, the air suction pressure Ps of the defrosting outdoor machine compressor is further reduced, the running stability of the defrosting outdoor machine compressor is improved, and the defrosting outdoor machine compressor is prevented from being damaged due to the fact that the air suction load is excessively increased.
In addition, since the sensor for detecting the discharge pressure of the compressor of the heating outdoor unit and the suction pressure of the compressor of the defrosting outdoor unit is also a sensor of the air conditioner itself, and is not a sensor newly added in the present embodiment, the manufacturing cost of the air conditioner is not increased significantly.
Particularly, the suction pressure Ps of the compressor of the defrosting outdoor unit can be directly obtained, and the compressor of the defrosting outdoor unit can be reliably prevented from being damaged without being influenced by the pressure drop of a valve or a pipeline. If the discharge pressure Pd of the heating outdoor unit compressor is obtained, since there is a pressure drop from the discharge port of the heating outdoor unit compressor to the suction port of the defrosting outdoor unit compressor, and the pressure drop is caused by the four-way valve, the pipeline, and the like, the suction pressure Ps of the defrosting outdoor unit compressor is inevitably smaller than the discharge pressure Pd of the heating outdoor unit compressor. That is, the discharge pressure Pd of the heating outdoor unit compressor is adjusted to be less than or equal to the preset pressure value Pi, which means that the suction pressure Ps of the defrosting outdoor unit compressor is inevitably less than the preset pressure value Pi, and the operation stability of the defrosting outdoor unit compressor is further improved.
Specifically, the preset pressure value Pi is located in a preset pressure interval of the floating fluctuation value Δ P of the target pressure value Pt, and an upper limit value of the preset pressure interval is smaller than an upper limit value of suction pressure of the compressor.
More specifically, the preset pressure value Pi may be an upper limit value of a preset pressure interval, so that the discharge pressure Pd of the heating outdoor unit compressor or the suction pressure Ps of the defrosting outdoor unit compressor is within the whole preset pressure interval, the rotating speed of the heating outdoor unit compressor does not need to be changed, and the service life of the compressor is prevented from being shortened due to frequent speed change of the heating outdoor unit compressor.
Generally, if the upper limit value of the compressor suction pressure Ps of the defrosting outdoor unit is 30bar, the upper limit value of the preset pressure interval may be controlled to be smaller than 1/2 of the upper limit value of the compressor suction pressure, or about 1/3 or 40%, that is, the upper limit value of the preset pressure interval is smaller than 15bar, and may be 10bar or 12bar.
The preset pressure value Pi is located in the preset pressure interval, and the upper limit value of the preset pressure interval is smaller than the upper limit value of the suction pressure of the compressor, so that the suction pressure Ps of the compressor of the defrosting outdoor unit is smaller than the upper limit value of the suction pressure of the compressor, the compressor of the defrosting outdoor unit is located in the working range with proper suction load, and the service life of the compressor is prolonged.
And S240, if the exhaust pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is smaller than the lower limit value of the preset pressure interval, controlling the compressor of the heating outdoor unit to increase the rotating speed by the rotating speed adjusting value.
By setting the discharge pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit to be less than the lower limit value of the preset pressure interval, the rotating speed of the compressor of the heating outdoor unit is increased, accordingly, the discharge pressure Pd of the compressor of the heating outdoor unit can be increased, the suction pressure Ps of the compressor of the defrosting outdoor unit can be further increased, and the insufficient defrosting capacity caused by the excessive reduction of the suction pressure Ps of the compressor of the defrosting outdoor unit is prevented.
And if the discharge pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is in a preset pressure interval, keeping the rotating speed of the compressor of the heating outdoor unit unchanged.
Because the work of the heating outdoor unit compressor is not absolutely stable, the discharge pressure Pd of the heating outdoor unit compressor also fluctuates to a certain extent, therefore, a preset pressure interval is set, when the discharge pressure Pd of the heating outdoor unit compressor or the suction pressure Ps of the defrosting outdoor unit compressor is in the interval, although the discharge pressure Pd or the suction pressure Ps of the defrosting outdoor unit compressor floats, the rotation speed of the heating outdoor unit compressor is not adjusted as long as the discharge pressure Pd or the suction pressure Ps of the defrosting outdoor unit compressor is not more than the upper limit value or the lower limit value of the preset pressure interval, and the service life shortening caused by frequent speed change of the compressor is avoided.
Wherein the target pressure value Pt is 9-11 bar. Further, it may be 10bar. And the fluctuation value DeltaP is 1.5bar-2.5bar. Further, it may be 2bar. And the rotating speed adjusting value is 5% -15% of the maximum rotating speed of the compressor. Further, the rotation speed adjustment value is 10% of the maximum rotation speed of the compressor.
That is, in this embodiment, the lower limit value of the preset pressure interval is 10-2=8bar, and the upper limit value of the preset pressure interval is 10+2=12bar. When the discharge pressure Pd of the heating outdoor machine compressor or the suction pressure Ps of the defrosting outdoor machine compressor is in the interval range of [8bar,12bar ], the rotating speed of the heating outdoor machine compressor is kept unchanged, and when the discharge pressure Pd of the heating outdoor machine compressor or the suction pressure Ps of the defrosting outdoor machine compressor is more than 12bar, the rotating speed of the heating outdoor machine compressor is reduced by 10% of the maximum rotating speed. And when the discharge pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is less than 8bar, the rotating speed of the discharge pressure Pd of the compressor of the heating outdoor unit is increased by 10 percent of the maximum rotating speed.
And S250, if a defrosting ending operation instruction is received, the rotating speed of the compressor of the heating outdoor unit is not controlled according to the suction pressure Ps of the compressor of the defrosting outdoor unit and the discharge pressure Pd of the compressor of the heating outdoor unit.
Fig. 3 is a schematic flowchart illustrating another defrosting control method for outdoor units of a multi-connected air conditioner according to an embodiment of the present invention, where the method includes:
s301, controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
s302, obtaining the exhaust pressure Pd of the heating outdoor unit compressor;
s303, judging whether the exhaust pressure Pd of the compressor of the heating outdoor unit is greater than a preset pressure value Pi, if so, executing S304, and if not, executing S305;
s304, reducing the rotating speed of the compressor of the heating outdoor unit by 10% of the maximum rotating speed, and executing S303;
s305, judging whether the exhaust pressure Pd of the compressor of the heating outdoor unit is smaller than the lower limit value of a preset pressure interval, if so, executing S306, and if not, executing S307;
s306, increasing the rotating speed of the compressor of the heating outdoor unit by 10% of the maximum rotating speed, and executing S303;
s307, judging whether a defrosting operation ending instruction is received, if so, executing S308, otherwise, executing S303;
and S308, ending.
Fig. 4 is a schematic flowchart of another defrosting control method for an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention, where the method includes:
s401, controlling a four-way valve of a defrosting outdoor unit to be switched to a refrigerating state;
s402, acquiring suction pressure Ps of a compressor of the defrosting outdoor unit;
s403, judging whether the suction pressure Ps of the compressor of the defrosting outdoor unit is greater than a preset pressure value Pi, if so, executing S404, otherwise, executing S405;
s404, reducing the rotating speed of the compressor of the heating outdoor unit by 10% of the maximum rotating speed, and executing S403;
s405, judging whether the suction pressure Ps of the compressor of the defrosting outdoor unit is smaller than the lower limit value of a preset pressure interval, if so, executing S406, and if not, executing S407;
s406, increasing the rotating speed of the compressor of the heating outdoor unit by 10% of the maximum rotating speed, and executing S403;
s407, judging whether a defrosting operation ending instruction is received or not, if so, executing S408, and if not, executing S403;
and S408, ending.
Fig. 5 is a defrosting control device of an outdoor unit of a multi-connected air conditioner according to an embodiment of the present invention, and the defrosting control device of the outdoor unit of the multi-connected air conditioner includes:
the switching module 501 is used for controlling the four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
an obtaining module 502, configured to obtain a discharge pressure Pd of a heating outdoor unit compressor or a suction pressure Ps of a defrosting outdoor unit compressor;
the speed regulating module 502 is configured to control the heating outdoor unit compressor to reduce the rotation speed by the rotation speed adjustment value if the discharge pressure Pd of the heating outdoor unit compressor or the suction pressure Ps of the defrosting outdoor unit compressor is greater than the preset pressure value Pi.
In the defrosting control device for the multi-connected air conditioner outdoor unit provided by this embodiment, since the suction pressure Ps of the compressor of the defrosting outdoor unit is too high, which may cause the compressor of the defrosting outdoor unit to be damaged due to an excessive increase of the suction load, when the discharge pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is greater than the preset pressure value Pi, the rotation speed of the compressor of the heating outdoor unit is reduced, which may reduce the discharge pressure Pd of the compressor of the heating outdoor unit, i.e. reduce the pressure of the pipeline from the compressor of the heating outdoor unit to the compressor of the defrosting outdoor unit, and further reduce the suction pressure Ps of the compressor of the defrosting outdoor unit, thereby improving the stability of the operation of the suction pressure Ps of the compressor of the defrosting outdoor unit, and preventing the suction pressure Ps of the compressor of the defrosting outdoor unit from being damaged due to an excessive increase of the suction load.
Optionally, as an embodiment, the preset pressure value Pi is located in a preset pressure interval of the floating fluctuation value Δ P of the target pressure value Pt, and an upper limit value of the preset pressure interval is smaller than an upper limit value of the suction pressure of the compressor.
Alternatively, as an example, the target pressure value Pt is 9bar to 11bar.
Alternatively, as an embodiment, the fluctuation value Δ P is 1.5bar-2.5bar.
Optionally, as an embodiment, the rotation speed adjustment value is 5% -15% of the maximum value of the rotation speed of the compressor.
Optionally, as an embodiment, the speed regulation module 502 is specifically configured to: and if the exhaust pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is smaller than the lower limit value of the preset pressure interval, controlling the compressor of the heating outdoor unit to increase the rotating speed by a rotating speed adjusting value.
Optionally, as an embodiment, the speed regulation module 502 is specifically configured to: and if the discharge pressure Pd of the compressor of the heating outdoor unit or the suction pressure Ps of the compressor of the defrosting outdoor unit is in a preset pressure interval, keeping the rotating speed of the compressor of the heating outdoor unit unchanged.
The embodiment of the invention also provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the control method.
The embodiment of the present invention further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is read and executed by a processor, the control method provided in the above embodiment is implemented, and the same technical effect can be achieved, and in order to avoid repetition, details are not repeated here. The computer-readable storage medium may be a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk.
Of course, those skilled in the art can understand that all or part of the processes in the methods according to the above embodiments may be implemented by instructing a control device to implement the methods according to the above embodiments by a computer, and the program may be stored in a computer-readable storage medium, and when executed, the program may include the processes according to the above method embodiments, where the storage medium may be a memory, a magnetic disk, an optical disk, or the like.
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.
Finally, it should also be noted that, in this document, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrases "comprising a," "8230," "8230," or "comprising" does not exclude the presence of additional like elements in a process, method, article, or apparatus that comprises the element.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The control device of the air conditioner and the air conditioner disclosed by the embodiment correspond to the control method of the air conditioner disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the description of the method part.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein 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 defrosting control method for an outdoor unit of a multi-connected air conditioner is applied to a multi-connected air conditioner, wherein the multi-connected air conditioner is provided with a heating outdoor unit and a defrosting outdoor unit, and the defrosting control method for the outdoor unit of the multi-connected air conditioner comprises the following steps:
controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
acquiring the exhaust pressure of a compressor of a heating outdoor unit or the suction pressure of a compressor of a defrosting outdoor unit;
and if the exhaust pressure of the compressor of the heating outdoor unit or the suction pressure of the compressor of the defrosting outdoor unit is greater than a preset pressure value, controlling the compressor of the heating outdoor unit to reduce the rotating speed by a rotating speed adjusting value.
2. A multi-connected air conditioner outdoor unit defrosting control method as claimed in claim 1, wherein the preset pressure value is within a preset pressure interval of a target pressure value floating fluctuation value, and an upper limit value of the preset pressure interval is smaller than an upper limit value of a suction pressure of a compressor.
3. The outdoor unit defrosting control method of a multi-connected air conditioner according to claim 2, further comprising: and if the exhaust pressure of the compressor of the heating outdoor unit or the suction pressure of the compressor of the defrosting outdoor unit is smaller than the lower limit value of the preset pressure interval, controlling the compressor of the heating outdoor unit to increase the rotating speed by the rotating speed adjusting value.
4. The outdoor unit defrosting control method of a multi-connected air conditioner according to claim 2, wherein the target pressure value is 9 to 11bar.
5. The outdoor unit defrosting control method of a multi-connected air conditioner according to claim 4, wherein the fluctuation value is 1.5bar to 2.5bar.
6. A multi-connected air conditioner outdoor unit defrosting control method as claimed in claim 1, wherein the rotation speed adjustment value is 5% to 15% of the maximum rotation speed of the compressor.
7. A multi-connected air conditioner outdoor unit defrosting control method as claimed in claim 2, wherein if the discharge pressure of the heating outdoor unit compressor or the suction pressure of the defrosting outdoor unit compressor is greater than or equal to the lower limit of the preset pressure interval and less than or equal to the preset pressure value, the rotation speed of the heating outdoor unit compressor is maintained.
8. The utility model provides a many online air condensing units defrosting controlling means which characterized in that includes:
the switching module is used for controlling a four-way valve of the defrosting outdoor unit to be switched to a refrigerating state;
the acquisition module is used for acquiring the exhaust pressure of a compressor of the heating outdoor unit or the suction pressure of a compressor of the defrosting outdoor unit;
and the speed regulating module is used for controlling the heating outdoor unit compressor to reduce the rotating speed by a rotating speed regulating value if the exhaust pressure of the heating outdoor unit compressor or the suction pressure of the defrosting outdoor unit compressor is greater than a preset pressure value.
9. An air conditioner characterized by comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the control method according to any one of claims 1 to 7.
10. A computer-readable storage medium, characterized in that it stores a computer program which, when read and executed by a processor, implements the control method of any one of claims 1 to 7.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211580225.XA CN115789864A (en) | 2022-12-09 | 2022-12-09 | Multi-connected air conditioner outdoor unit defrosting control method and device, air conditioner and storage medium |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008209022A (en) * | 2007-02-23 | 2008-09-11 | Mitsubishi Heavy Ind Ltd | Multi-air conditioner |
| CN108444140A (en) * | 2018-05-08 | 2018-08-24 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| US20180274836A1 (en) * | 2014-12-15 | 2018-09-27 | Daikin Industries, Ltd. | Air conditioning apparatus |
| JP2019132468A (en) * | 2018-01-30 | 2019-08-08 | ダイキン工業株式会社 | Air conditioner |
| WO2021134959A1 (en) * | 2019-12-31 | 2021-07-08 | 青岛海尔空调器有限总公司 | Air conditioner, and method and device for controlling defrosting of air conditioner |
| CN114812028A (en) * | 2022-06-13 | 2022-07-29 | 宁波奥克斯电气股份有限公司 | Air conditioner, control method and device thereof and readable storage medium |
| CN115087838A (en) * | 2021-01-18 | 2022-09-20 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting control method, device, equipment and storage medium |
-
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- 2022-12-09 CN CN202211580225.XA patent/CN115789864A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008209022A (en) * | 2007-02-23 | 2008-09-11 | Mitsubishi Heavy Ind Ltd | Multi-air conditioner |
| US20180274836A1 (en) * | 2014-12-15 | 2018-09-27 | Daikin Industries, Ltd. | Air conditioning apparatus |
| JP2019132468A (en) * | 2018-01-30 | 2019-08-08 | ダイキン工業株式会社 | Air conditioner |
| CN108444140A (en) * | 2018-05-08 | 2018-08-24 | 广东美的制冷设备有限公司 | Air conditioner and its control method and computer readable storage medium |
| WO2021134959A1 (en) * | 2019-12-31 | 2021-07-08 | 青岛海尔空调器有限总公司 | Air conditioner, and method and device for controlling defrosting of air conditioner |
| CN115087838A (en) * | 2021-01-18 | 2022-09-20 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting control method, device, equipment and storage medium |
| CN114812028A (en) * | 2022-06-13 | 2022-07-29 | 宁波奥克斯电气股份有限公司 | Air conditioner, control method and device thereof and readable storage medium |
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