CN110726207A - Multi-system air conditioner control method and device - Google Patents
Multi-system air conditioner control method and device Download PDFInfo
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- CN110726207A CN110726207A CN201911031593.7A CN201911031593A CN110726207A CN 110726207 A CN110726207 A CN 110726207A CN 201911031593 A CN201911031593 A CN 201911031593A CN 110726207 A CN110726207 A CN 110726207A
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- air conditioning
- conditioning units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/49—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring ensuring correct operation, e.g. by trial operation or configuration checks
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
Abstract
The invention relates to a multi-system air conditioner control method and a device, wherein the method comprises the following steps: when any one of the air conditioning units breaks down and stops, judging whether the external environment is destructive to the air conditioning unit; and when the external environment does not damage the air conditioning units, controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate, and improving the refrigerating capacity or the heating capacity of the rest normal air conditioning units. The multi-system air conditioner control method is suitable for the multi-system air conditioner, when any one of a plurality of air conditioning units of the multi-system air conditioner is in fault shutdown, if the external environment does not damage the air conditioning units, the rest normal air conditioning units continue to operate, and synchronous protection shutdown of the rest normal air conditioning units is not needed. Therefore, the normal air conditioning unit which continuously operates can be used for refrigerating or heating, and a certain refrigerating capacity or heating capacity is increased, so that the refrigerating or heating requirements of the indoor environment temperature are met, and the normal life and work of a user cannot be influenced.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-system air conditioner control method and device.
Background
When one system of the traditional double-system air conditioner is stopped due to the fault of the compressor, the other system can be simultaneously stopped in a protection mode, so that components of the unit can be protected from being damaged under the abnormal operation condition, and the integral operation consistency of the unit is ensured.
However, when the unit is in a high-temperature environment and is in a fault shutdown state, the indoor environment temperature is increased, and the normal life and work of a user are affected.
Disclosure of Invention
Therefore, a multi-system air conditioner control method for preventing influence on normal life and work of users is needed.
A multi-system air conditioner control method comprises the following steps:
when any one of the air conditioning units breaks down and stops, judging whether the external environment is destructive to the air conditioning unit;
and when the external environment does not damage the air conditioning units, controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate, and improving the refrigerating capacity or the heating capacity of the rest normal air conditioning units.
The multi-system air conditioner control method is suitable for multi-system air conditioners, such as dual-system air conditioners. When any one of the air conditioning units of the multi-system air conditioner is in fault shutdown, if the external environment does not damage the air conditioning unit, the rest normal air conditioning units continue to operate, and the rest normal air conditioning units do not need to be synchronously protected and shut down. Therefore, the normal air conditioning unit which continuously operates can be used for refrigerating or heating, and a certain refrigerating capacity or heating capacity is increased, so that the refrigerating or heating requirements of the indoor environment temperature are met, and the normal life and work of a user cannot be influenced.
In one embodiment, the step of determining whether the external environment is destructive to the air conditioning unit specifically includes:
when the operation parameters of the remaining normal air conditioning units in the plurality of air conditioning units are within the fault proximity range, the external environment is destructive to the air conditioning units;
and when the operation parameters of the rest normal air conditioning units in the plurality of air conditioning units are positioned outside the fault approaching range, the external environment has no destructiveness to the air conditioning units.
In one embodiment, the fault proximity range is a range between a proximity parameter value and a fault parameter value; wherein the proximity parameter value is less than the failure parameter value.
In one embodiment, the proximity parameter value and the fault parameter value are an exhaust temperature proximity value and an exhaust temperature fault value, respectively, and the exhaust temperature proximity value and the exhaust temperature fault value are different by 5 ℃.
In one embodiment, the proximity parameter value and the malfunction parameter value are an exhaust pressure proximity value and an exhaust pressure malfunction value, respectively, and the exhaust pressure proximity value and the exhaust pressure malfunction value differ by 0.1 MPA.
In one embodiment, the step of increasing the cooling capacity of the normal air conditioning unit specifically includes:
and when the outdoor environment temperature is within the preset range, improving the running frequency of the compressor in the normal air conditioning unit.
In one embodiment, the step of increasing the operating frequency of the compressor in the normal air conditioning unit when the outdoor temperature is within the preset range includes:
when the outdoor temperature is within a first preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a first amplitude;
when the outdoor temperature is within a second preset range, the operating frequency of a compressor in the normal air conditioning unit is increased by a second amplitude;
the maximum value of the first preset range is smaller than or equal to the minimum value of the second preset range, and the first amplitude is larger than the second amplitude.
In one embodiment, the step of increasing the operating frequency of the compressor in the normal air conditioning unit when the outdoor temperature is within the preset range further includes:
and when the outdoor temperature is smaller than the minimum value of the first preset range, the operating frequency of the compressor in the normal air conditioning unit is increased by the second amplitude.
In one embodiment, the step of increasing the operating frequency of the compressor in the normal air conditioning unit when the outdoor temperature is within the preset range includes:
when the outdoor environment temperature is within a third preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a third amplitude;
when the outdoor environment temperature is lower than the minimum value of the third preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a fourth amplitude; wherein the fourth amplitude is less than the third amplitude.
In one embodiment, the step of increasing the cooling capacity of the normal air conditioning unit further includes:
and when the outdoor environment temperature is greater than the maximum value of the preset range, the running frequency of the compressor in the normal air conditioning unit is kept unchanged.
The present invention also provides a multi-system air conditioner control device, including:
the judging module is used for judging whether the external environment has destructiveness to the air conditioning unit when any one of the plurality of air conditioning units breaks down and stops;
and the control module is used for controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate and improving the refrigerating capacity or the heating capacity of the normal air conditioning units when the external environment does not damage the air conditioning units.
The invention also provides a multi-system air conditioner which comprises a compressor, an evaporator and a condenser which are sequentially connected end to end, wherein the compressor operates according to the control method.
Drawings
Fig. 1 is a flowchart illustrating a multi-system air conditioner control method according to an embodiment of the present invention.
Detailed Description
To facilitate an understanding of the invention, the invention will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
As shown in fig. 1, in an embodiment of the present invention, a multi-system air conditioner control method is provided, including the following steps:
and step S100, when any one of the air conditioning units breaks down and stops, judging whether the external environment is destructive to the air conditioning unit. The destructiveness of the external environment on the air conditioning unit can be understood as that the external wind sand blocks the air conditioning unit, and the storm snow freezes the air conditioning unit, so that the normal heat dissipation of the air conditioning unit and the external air is influenced, the heat exchange load of the air conditioning unit is increased, and the air conditioning unit is damaged when in overload operation.
Specifically, when the operation parameters of the remaining normal air conditioning units in the plurality of air conditioning units are within the fault proximity range, the external environment is destructive to the air conditioning units; when the operation parameters of the rest normal air conditioning units in the plurality of air conditioning units are located outside the fault approaching range, the external environment has no destructiveness to the air conditioning units.
That is to say, in the process of simultaneously operating a plurality of air conditioning units, when one air conditioning unit is found to be out of order and shut down, the operating parameters of other remaining normal air conditioning units which are not shut down are judged, if the operating parameters of the remaining normal air conditioning units enter the failure approaching range, the normal air conditioning units can be exposed to the risk of failure during continuous operation, most of the plurality of air conditioning units are out of order, and the external environment is bad and destructive. If the operating parameters of the normal air conditioning units are located outside the fault proximity range, the operating parameters of the normal air conditioning units are normal, no fault limit exists, the fault units in the multiple air conditioning units are not reached by the external environment, and the external environment is not destructive.
Further, the fault proximity range is a range between a proximity parameter value and a fault parameter value; wherein the proximity parameter value is less than the failure parameter value. When the operating parameters of the normal air conditioning unit are located between the adjacent parameter values and the fault parameter values, the fact that the operating parameters of the air conditioning unit are close to the fault parameter values is proved, faults are likely to occur, all the air conditioning units tend to break down, and the external environment where the air conditioning units are located is likely to be destructive. When the operation parameter of the normal air conditioning unit is smaller than the adjacent parameter value, the operation parameter of the air conditioning unit is far away from the fault parameter value, and the air conditioning unit is in a normal state.
Optionally, the approach parameter value and the fault parameter value are respectively an exhaust temperature approach value and an exhaust temperature fault value, and the difference between the exhaust temperature approach value and the exhaust temperature fault value is 5 ℃; when the exhaust temperature of the normal air conditioning unit is less than 5 ℃ away from the exhaust temperature fault value, the exhaust temperature is within the fault proximity range, and the external environment is destructive to the air conditioning unit; when the exhaust temperature of the normal air conditioning unit is more than 5 ℃ away from the exhaust temperature fault value, the exhaust temperature is out of the fault proximity range, and the external environment is proved to have no damage to the air conditioning unit. Or the proximity parameter value and the fault parameter value are respectively an exhaust pressure proximity value and an exhaust pressure fault value, and the difference between the exhaust pressure proximity value and the exhaust pressure fault value is 0.1 MPA; when the exhaust pressure of the normal air conditioning unit is less than 0.1MPA from the exhaust pressure fault value, the exhaust pressure is located in the fault proximity range, and the external environment is destructive to the air conditioning unit; when the exhaust pressure of the normal air conditioning unit is larger than 0.1MPA from the exhaust pressure fault value, the exhaust pressure is positioned outside the fault proximity range, and the external environment does not have destructiveness to the air conditioning unit.
And step S300, when the external environment does not damage the air conditioning units, controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate, and improving the refrigerating capacity or the heating capacity of the rest normal air conditioning units so as to provide enough refrigerating capacity or heating capacity as far as possible when part of the air conditioning units fail to operate.
That is to say, compensation calculation is carried out on the remaining normal air conditioning units, the rotating speeds of the compressor and the fan are increased as much as possible within a reliable operation range, and the refrigerating capacity or the heating capacity of a single normal air conditioning unit is increased.
Therefore, when any one of the plurality of air conditioning units of the multi-system air conditioner is in fault shutdown, if the external environment does not damage the air conditioning units, the rest normal air conditioning units continue to operate, and the rest normal air conditioning units do not need to be synchronously protected and shut down. Therefore, the normal air conditioning unit which continuously operates can be used for refrigerating or heating, and a certain refrigerating capacity or heating capacity is increased, so that the refrigerating or heating requirements of the indoor environment temperature are met, and the normal life and work of a user cannot be influenced.
The following description will be made with respect to a multi-system air conditioning unit under a refrigeration condition.
Further, step S300 includes step S310 and step S330.
And S310, when the outdoor environment temperature is within the preset range, increasing the running frequency of the compressor in the normal air conditioning unit so as to increase the rotating speed of the compressor and further increase the refrigerating capacity of the normal air conditioning unit. And the outdoor environment temperature is in the preset range, the running frequency of the compressor is improved, the exhaust pressure and the temperature cannot exceed the standard, and the bearing range of components cannot be exceeded.
And step S330, when the outdoor temperature is greater than the maximum value of the preset range, keeping the running frequency of the compressor in the normal air conditioning unit unchanged. At this time, the outside temperature is already high, and the operating frequency of the compressor is increased, so that problems such as untimely heat dissipation and the like may occur, and therefore, the operating frequency of the compressor cannot be continuously increased in order to ensure the reliability of the component devices of the air conditioner.
In some embodiments, step S310 includes the steps of:
step S311, when the outdoor temperature is within a first preset range, increasing the running frequency of a compressor in the normal air conditioning unit by a first amplitude;
step 313, when the outdoor temperature is within a second preset range, increasing the operating frequency of the compressor in the normal air conditioning unit by a second amplitude; the maximum value of the first preset range is smaller than or equal to the minimum value of the second preset range, namely the temperature in the second preset range is higher than the temperature in the first preset range, and the first amplitude is larger than the second amplitude.
That is, when the outdoor temperature is within the first preset range and the temperature is low, the operating frequency of the compressor is increased by a first large margin. Because the outdoor temperature is lower, more exhaust temperature can be emitted, and more compressor operation frequency can be increased to generate more refrigerating capacity. When the outdoor temperature is within the second preset range and the temperature is higher, the operation frequency of the compressor is improved by a second smaller amplitude, so that the phenomenon that the excessive exhaust temperature is generated and the heat cannot be dissipated in time in the external environment with higher temperature is avoided.
And step S315, when the outdoor temperature is smaller than the minimum value of the first preset range, increasing the running frequency of the compressor in the normal air conditioning unit by a second amplitude. At the moment, the outdoor temperature is lower, the working frequency of the compressor does not need to be too high, and the indoor temperature can reach the target refrigerating temperature, so that the running frequency of the compressor in the air conditioning unit is increased by a second smaller amplitude.
Optionally, in this particular embodiment, the first predetermined range is 24-35 deg.C, the second predetermined range is 35-43 deg.C, the first amplitude is 20Hz, and the second amplitude is 10 Hz.
In some other embodiments, step S310 includes the steps of:
step S312, when the outdoor environment temperature is within a third preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a third amplitude;
step S314, when the outdoor environment temperature is lower than the minimum value of the third preset range, the running frequency of the compressor in the normal air conditioning unit is increased by a fourth amplitude; wherein the fourth amplitude is less than the third amplitude.
For example, for some air conditioning units with better heat dissipation performance in a higher temperature environment, if the outdoor temperature is in the third temperature range, the outdoor temperature is higher, the operating frequency of a compressor in the air conditioning unit is increased by a higher amplitude (i.e., the third amplitude), the air conditioning unit can also complete heat dissipation through the better heat dissipation performance, the situation of overhigh exhaust temperature or pressure is avoided, and meanwhile, more cooling capacity can be generated. And when the outdoor environment temperature is lower than the minimum value of the third preset range, properly increasing the running frequency of the compressor.
Optionally, the third temperature range is 38 ℃ to 48 ℃, the third amplitude is 20HZ, and the fourth amplitude is 10 HZ.
Based on the multi-system air conditioner control method, the invention also provides a multi-system air conditioner control device which comprises a judgment module and a control module. And the judging module is used for judging whether the external environment has destructiveness to the air conditioning unit when any one of the air conditioning units breaks down and stops. And the control module is used for controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate and improving the refrigerating capacity or the heating capacity of the normal working units when the external environment does not damage the air conditioning units.
The multi-system air conditioner control device is used for controlling a multi-system air conditioner, such as a dual-system air conditioner. When any one of the air conditioning units of the multi-system air conditioner is in fault shutdown, if the external environment does not damage the air conditioning unit, the rest normal air conditioning units continue to operate, and the rest normal air conditioning units do not need to be synchronously protected and shut down. Therefore, the normal air conditioning unit which continuously operates can be used for refrigerating or heating, and a certain refrigerating capacity or heating capacity is increased, so that the refrigerating or heating requirements of the indoor environment temperature are met, and the normal life and work of a user cannot be influenced.
The invention also provides a multi-system air conditioner which comprises a compressor, an evaporator and a condenser which are sequentially connected end to end, wherein the compressor operates according to the control method. The compressor is controlled to operate according to the target frequency, high-temperature and high-pressure refrigerants are generated and enter the evaporator to be evaporated and radiated, the low-temperature refrigerants subjected to evaporation and radiation enter the condenser to be condensed and absorb heat, the indoor temperature is reduced, and the refrigerating effect is achieved.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (12)
1. A multi-system air conditioner control method is characterized by comprising the following steps:
when any one of the air conditioning units breaks down and stops, judging whether the external environment is destructive to the air conditioning unit;
and when the external environment does not damage the air conditioning units, controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate, and improving the refrigerating capacity or the heating capacity of the rest normal air conditioning units.
2. The multi-system air conditioner control method according to claim 1, wherein the step of judging whether the external environment is destructive to the air conditioning unit is specifically:
when the operation parameters of the remaining normal air conditioning units in the plurality of air conditioning units are within the fault proximity range, the external environment is destructive to the air conditioning units;
and when the operation parameters of the rest normal air conditioning units in the plurality of air conditioning units are positioned outside the fault approaching range, the external environment has no destructiveness to the air conditioning units.
3. The multi-system air conditioner control method according to claim 2, wherein the failure proximity range is a range between a proximity parameter value and a failure parameter value; wherein the proximity parameter value is less than the failure parameter value.
4. The multi-system air conditioning control method according to claim 3, wherein the proximity parameter value and the fault parameter value are an exhaust temperature proximity value and an exhaust temperature fault value, respectively, and the difference between the exhaust temperature proximity value and the exhaust temperature fault value is 5 ℃.
5. The multi-system air conditioner control method according to claim 3, wherein the proximity parameter value and the failure parameter value are a discharge pressure proximity value and a discharge pressure failure value, respectively, and the difference between the discharge pressure proximity value and the discharge pressure failure value is 0.1 MPA.
6. The multi-system air conditioner control method according to any one of claims 1 to 5, wherein the step of increasing the cooling capacity of the remaining normal air conditioning units is specifically:
and when the outdoor environment temperature is within the preset range, improving the running frequency of the compressors in the rest normal air conditioning units.
7. The multi-system air conditioner control method as claimed in claim 6, wherein the step of increasing the operating frequency of the compressor in the normal air conditioning unit when the outdoor temperature is within the preset range comprises:
when the outdoor temperature is within a first preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a first amplitude;
when the outdoor temperature is within a second preset range, the operating frequency of a compressor in the normal air conditioning unit is increased by a second amplitude;
the maximum value of the first preset range is smaller than or equal to the minimum value of the second preset range, and the first amplitude is larger than the second amplitude.
8. The multi-system air conditioning control method according to claim 7, wherein the step of increasing the operating frequency of the compressor in the normal air conditioning unit when the outdoor temperature is within the preset range further comprises:
and when the outdoor temperature is smaller than the minimum value of the first preset range, the operating frequency of the compressor in the normal air conditioning unit is increased by the second amplitude.
9. The multi-system air conditioner control method as claimed in claim 6, wherein the step of increasing the operating frequency of the compressor in the normal air conditioning unit when the outdoor temperature is within the preset range comprises:
when the outdoor environment temperature is within a third preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a third amplitude;
when the outdoor environment temperature is lower than the minimum value of the third preset range, the running frequency of a compressor in the normal air conditioning unit is increased by a fourth amplitude; wherein the fourth amplitude is less than the third amplitude.
10. The multi-system air conditioning control method according to claim 6, wherein the step of increasing the cooling capacity of the normal air conditioning unit further comprises:
and when the outdoor environment temperature is greater than the maximum value of the preset range, the running frequency of the compressor in the normal air conditioning unit is kept unchanged.
11. A multi-system air conditioning control apparatus, comprising:
the judging module is used for judging whether the external environment has destructiveness to the air conditioning unit when any one of the plurality of air conditioning units breaks down and stops;
and the control module is used for controlling the rest normal air conditioning units in the plurality of air conditioning units to continue to operate and improving the refrigerating capacity or the heating capacity of the rest normal air conditioning units when the external environment does not damage the air conditioning units.
12. A multi-system air conditioner comprising a compressor, an evaporator and a condenser in serial end-to-end communication, said compressor operating according to the control method of any of the preceding claims 1-10.
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| CN110726207B (en) | 2021-02-05 |
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