CN115523610B - Multi-split blocking control method and device and multi-split - Google Patents
Multi-split blocking control method and device and multi-split Download PDFInfo
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- CN115523610B CN115523610B CN202211055359.XA CN202211055359A CN115523610B CN 115523610 B CN115523610 B CN 115523610B CN 202211055359 A CN202211055359 A CN 202211055359A CN 115523610 B CN115523610 B CN 115523610B
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- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000000903 blocking effect Effects 0.000 title claims abstract description 27
- 238000004891 communication Methods 0.000 claims description 11
- 238000012423 maintenance Methods 0.000 claims description 8
- 238000004590 computer program Methods 0.000 claims description 7
- 238000005057 refrigeration Methods 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000001816 cooling Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000002222 downregulating effect Effects 0.000 description 1
- 230000003828 downregulation Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/38—Failure diagnosis
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
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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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- 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
- F24F11/65—Electronic processing for selecting an operating mode
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/88—Electrical aspects, e.g. 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
- F24F2140/00—Control inputs relating to system states
- F24F2140/10—Pressure
- F24F2140/12—Heat-exchange fluid pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- 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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- Engineering & Computer Science (AREA)
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- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
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- Mathematical Physics (AREA)
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a multi-split blocking control method, a device and a multi-split; wherein the method comprises the following steps: if the multi-split air conditioner operates in a refrigerating mode, acquiring operation parameters of each outdoor unit; judging whether the corresponding outdoor unit is blocked or not according to the operation parameters; if so, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode; and in the independent control mode, the target low-pressure interval of the second outdoor unit is adjusted downwards according to the preset adjustment value so as to increase the operating frequency of the second outdoor unit. In the control mode, whether the corresponding outdoor unit is blocked or not is judged through the operation parameters, and when the first outdoor unit is blocked, the operation frequency of the second outdoor unit is increased, so that the integral capacity of the multi-split air conditioner is improved, the reliable operation of the multi-split air conditioner is ensured, and the comfort level of a user is improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a multi-split blocking control method and device and a multi-split.
Background
At present, for a multi-split air conditioner with multiple outdoor units running in parallel, the frequency control of the outdoor units is mainly determined according to a target low-pressure interval, wherein the target low-pressure interval comprises a target low-pressure upper limit and a target low-pressure upper limit, when the actual low pressure is larger than the target low-pressure upper limit, the frequency raising control is performed, when the actual low pressure is smaller than the target low-pressure lower limit, the frequency lowering control is performed, and when the actual low pressure meets the target low-pressure interval, the current frequency is maintained. In practical application, when the low pressure side (i.e. the large valve) of a certain outdoor unit is blocked, the frequencies of all outdoor units cannot be increased due to the influence of lower low pressure and higher exhaust temperature, so that the output capacity of the multi-split system is reduced, the effect of the multi-split system is reduced, and poor experience is brought to users.
Disclosure of Invention
Accordingly, the present invention is directed to a method and an apparatus for controlling the blockage of a multi-split air conditioner, and a multi-split air conditioner, so as to alleviate the problem that the output capacity of the multi-split air conditioner becomes smaller due to the blockage of a part of outdoor units in the multi-split air conditioner.
In a first aspect, an embodiment of the present invention provides a multi-split blocking control method, which is applied to a controller of a multi-split; the multi-split air conditioner further comprises an outdoor side assembly in communication connection with the controller, wherein the outdoor side assembly comprises a plurality of outdoor units connected in parallel, and the method comprises the following steps: if the multi-split air conditioner operates in a refrigerating mode, acquiring operation parameters of each outdoor unit; the operation parameters comprise a low pressure value, an exhaust temperature, a high pressure value and a fan rotating speed; judging whether the corresponding outdoor unit is blocked or not according to the operation parameters; if so, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode; and in the independent control mode, the target low-pressure interval of the second outdoor unit is adjusted downwards according to the preset adjustment value so as to increase the operating frequency of the second outdoor unit.
According to the multi-split air conditioner blockage control method, whether the corresponding outdoor unit is blocked or not is judged through the operation parameters, and when the first outdoor unit is blocked, the operation frequency of the second outdoor unit is increased, so that the overall capacity of the multi-split air conditioner is improved, the reliable operation of the multi-split air conditioner is ensured, and the comfort level of a user is improved.
Preferably, the method further comprises: in the independent control mode, setting first priority information of the first outdoor unit and second priority information of the second outdoor unit; wherein the second priority information is higher than the first priority information.
Preferably, the step of determining whether the corresponding outdoor unit is blocked according to the operation parameters includes: for each outdoor unit, judging: (1) Whether the sum of the low-voltage value and the first preset value is smaller than the low-voltage average value of all the outdoor units or not; (2) Whether the exhaust temperature is greater than the sum of the average exhaust value of all the outdoor units and a second preset value; (3) Whether the sum of the high pressure value and the third preset value is smaller than the maximum high pressure value of all the outdoor units; (4) Whether the sum of the fan rotating speed and the fourth preset value is smaller than the maximum value of the fan rotating speeds of all the outdoor units; if the above (1) - (4) are all yes, the corresponding outdoor unit is blocked.
Preferably, the first preset value is 1bar, the second preset value is 25 ℃, the third preset value is 2bar, and the fourth preset value is 500rpm.
Preferably, the method further comprises: and generating alarm information of the first outdoor unit to prompt maintenance personnel to maintain the first outdoor unit.
Preferably, the preset adjustment value is 3.
In a second aspect, the embodiment of the invention also provides a multi-split blocking control device, which is applied to a controller of the multi-split; the multi-split air conditioner further comprises an outdoor side assembly in communication connection with the controller, wherein the outdoor side assembly comprises a plurality of outdoor units connected in parallel, and the device comprises: the acquisition module is used for acquiring the operation parameters of each outdoor unit if the multi-split air conditioner operates in a refrigerating mode; the operation parameters comprise a low pressure value, an exhaust temperature, a high pressure value and a fan rotating speed; the judging module is used for judging whether the corresponding outdoor unit is blocked or not according to the operation parameters; a switching module for taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode if the blockage is detected; and the adjusting module is used for adjusting the target low-pressure interval of the second outdoor unit downwards according to a preset adjusting value in the independent control mode so as to increase the operating frequency of the second outdoor unit.
Preferably, the apparatus further comprises: in the independent control mode, setting first priority information of the first outdoor unit and second priority information of the second outdoor unit; wherein the second priority information is higher than the first priority information.
In a third aspect, an embodiment of the present invention further provides a multi-split air conditioner, including a memory, a processor, and a computer program stored in the memory and capable of running on the processor, where the processor executes the computer program to implement the steps of the method of the first aspect.
In a fourth aspect, embodiments of the present invention also provide a computer readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the method of the first aspect described above.
The embodiment of the invention has the following beneficial effects:
The embodiment of the invention provides a multi-split blocking control method, a multi-split blocking control device and a multi-split, wherein when the multi-split is in refrigeration operation, the operation parameters of each outdoor unit are obtained; the operation parameters comprise a low pressure value, an exhaust temperature, a high pressure value and a fan rotating speed; judging whether the corresponding outdoor unit is blocked or not according to the operation parameters; if so, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode; and in the independent control mode, the target low-pressure interval of the second outdoor unit is adjusted downwards according to the preset adjustment value so as to increase the operating frequency of the second outdoor unit. In the control mode, whether the corresponding outdoor unit is blocked or not is judged through the operation parameters, and when the first outdoor unit is blocked, the operation frequency of the second outdoor unit is increased, so that the integral capacity of the multi-split air conditioner is improved, the reliable operation of the multi-split air conditioner is ensured, and the comfort level of a user is improved.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and drawings.
In order to make the above objects, features and advantages of the present invention more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are needed in the description of the embodiments or the prior art will be briefly described, and it is obvious that the drawings in the description below are some embodiments of the present invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a multi-split air conditioner according to an embodiment of the present invention;
FIG. 2 is a flowchart of a multi-split blocking control method according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of a multi-split blocking control device according to an embodiment of the present invention;
Fig. 4 is a schematic structural diagram of another multi-split air conditioner according to an embodiment of the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In order to facilitate understanding of the present embodiment, a detailed description of a multi-split blocking control method provided by the embodiment of the present invention is first provided below. The execution main body is a controller of the multi-split air conditioner, as shown in fig. 1, the multi-split air conditioner further comprises an outdoor side assembly and an indoor side assembly, the outdoor side assembly is in communication connection with the controller, the outdoor side assembly comprises a plurality of outdoor units 11 connected in parallel, and the indoor side assembly comprises a plurality of indoor units 21 connected in parallel. Specifically, for each outdoor unit 11, it includes, but is not limited to: the compressor 111, the gas-liquid separator 112, the oil separator 113, the four-way valve 114, the outdoor heat exchanger 115, and the high pressure sensor 116 are provided on the connection line between the oil separator 113 and the four-way valve 114, the low pressure sensor 117 is provided on the connection line between the compressor 111 and the gas-liquid separator 112, the outdoor heat exchanger 115 is connected with the outdoor electronic expansion valve 118, the outdoor heat exchanger 115 is provided with a fan, the four-way valve 114 is also connected with a plurality of parallel indoor units 21 through a large valve 1191, and the outdoor electronic expansion valve 118 and the outdoor heat exchanger 115 are connected with a plurality of parallel indoor units 21 through a small valve 1192.
In addition, the outdoor unit 11 and the indoor unit 21 in the multi-split air conditioner are connected through an inner unit connecting pipe and an outer unit connecting pipe, wherein the inner unit connecting pipe and the outer unit connecting pipe comprise an air pipe connecting pipe and a liquid pipe connecting pipe, an air pipe branch pipe is further arranged between each outdoor unit 11 and the air pipe connecting pipe, and a liquid pipe branch pipe is arranged between the liquid pipe connecting pipes. It should be noted that, for the specific structure of the indoor unit 21 and the parts not mentioned in the multi-split air conditioner, reference may be made to the existing air conditioner, and the embodiments of the present invention are not described in detail herein.
Based on the multi-split air conditioner, an embodiment of the present invention provides a multi-split air conditioner blocking control method, as shown in fig. 2, comprising the following steps:
Step S202, if the multi-split air conditioner operates in refrigeration mode, operation parameters of each outdoor unit are obtained;
The operation parameters comprise a low pressure value, an exhaust temperature, a high pressure value and a fan rotating speed; specifically, the low pressure value refers to a low pressure value of a compressor in the outdoor unit, and is obtained according to detection of a low pressure sensor; the exhaust temperature refers to the exhaust temperature of the compressor, and can be obtained according to a temperature sensor or a temperature sensing bulb; the high pressure value refers to the high pressure value of the compressor and can be obtained according to a high pressure sensor; and the fan rotating speed refers to the rotating speed of an outdoor fan in the outdoor unit. In the multi-split air conditioner refrigeration operation, the controller respectively obtains the operation parameters of each outdoor unit so as to judge whether the outdoor unit is blocked according to the operation parameters, wherein the blocking refers to the blocking between the air pipe branch pipe of the outdoor unit and the low pressure sensor, such as the blocking at the large valve 1191 at the low pressure side of the outdoor unit 11.
Step S204, judging whether the corresponding outdoor unit is blocked according to the operation parameters;
specifically, for each outdoor unit, it is determined that: (1) Whether the sum of the low-voltage value and the first preset value is smaller than the low-voltage average value of all the outdoor units or not; (2) Whether the exhaust temperature is greater than the sum of the average exhaust value of all the outdoor units and a second preset value; (3) Whether the sum of the high pressure value and the third preset value is smaller than the maximum high pressure value of all the outdoor units; (4) Whether the sum of the fan rotating speed and the fourth preset value is smaller than the maximum value of the fan rotating speeds of all the outdoor units; if the above (1) - (4) are all yes, the corresponding outdoor unit is blocked.
In practical application, a plurality of outdoor units connected in parallel in the multi-split air conditioner operate in a refrigerating mode, and the low pressure of each outdoor unit is communicated and the low pressure value is relatively close. If a large valve of an outdoor unit is blocked, the outdoor unit has large pressure loss, low pressure value, small refrigerant flow and high exhaust temperature; the outdoor unit which is not blocked has small pressure loss, more refrigerant flow, higher low-pressure value and normal exhaust temperature. In addition, the exhaust flow of the compressor in the outdoor unit which is blocked is small, and the high pressure value is slightly low; and, because the outdoor fan controls the high-pressure value in the cooling mode, because the high-pressure value is low, the rotational speed of the outdoor fan is reduced, therefore, for the outdoor unit which is blocked, the low-pressure value is smaller, the exhaust temperature is higher, the high-pressure value is smaller, and the rotational speed of the fan is smaller, i.e. whether the outdoor unit is blocked can be judged according to the difference of the low-pressure value, the exhaust temperature, the high-pressure value and the rotational speed of the fan.
For example, for N (N is greater than or equal to 2) outdoor units operating in parallel, after a period of time of stable cooling operation, the operation parameters of each outdoor unit are obtained, for example, for the ith outdoor unit, the operation parameters include: low pressure value Psi, exhaust temperature Tdi, high pressure value Pdi and fan speed Ri, if simultaneously: (1) psi+A < PSAVERAGE; a represents a first preset value, PSAVERAGE represents a low-voltage average value of all outdoor units; (2) Tdi > TDAVERAGE +B; b represents a second preset value, TDAVERAGE represents an average value of the exhaust gas of all the outdoor units; (3) pdi+c < Pdmax; c represents a third preset value, and Pdmax represents the maximum high pressure value of all outdoor units; (4) Ri+D < Rmax; d represents a fourth preset value, rmax represents the maximum value of the fan speeds of all the outdoor units; it is determined that the i-th outdoor unit is blocked, that is, that the valve of the outdoor unit is blocked. The blocking judgment of the other outdoor units can refer to the ith outdoor unit, and the detailed description of the embodiment of the present invention is omitted.
Wherein the value range of the first preset value A is 0.5 bar-5 bar, preferably 1bar, the value range of the second preset value B is 10-50 ℃, preferably 25 ℃, the value range of the third preset value C is 0.5 bar-5 bar, preferably 2bar, and the value range of the fourth preset value D is 200 rpm-1000 rpm, preferably 500rpm.
Step S206, if yes, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode;
Specifically, when the outdoor unit is blocked, in order to facilitate the distinction, the outdoor unit with the blocked outdoor unit is taken as a first outdoor unit, the outdoor unit without the blocked outdoor unit is taken as a second outdoor unit, where the first outdoor unit and the second outdoor unit are only used for distinguishing the outdoor units in different states, and the actual number of the first outdoor unit and the second outdoor unit can be set according to the actual situation, for example, for four outdoor units running in parallel, one outdoor unit is blocked, and the other three outdoor units are not blocked, at this time, the number of the first outdoor units is 1, and the number of the second outdoor units is 3.
In addition, since the low-voltage value of the first outdoor unit is low and the exhaust temperature is high, in order to avoid limiting the frequencies of all the outdoor units, the controller is required to solve the limitation of the first outdoor unit to the second outdoor unit which is not blocked, and the controller is further configured to switch the first outdoor unit and the second outdoor unit from the parallel control mode to the independent control mode, so that the second outdoor unit is controlled by itself only in the independent control mode, and further, the frequency of the second outdoor unit is improved.
In step S208, in the single control mode, the target low pressure interval of the second outdoor unit is adjusted down according to the preset adjustment value to increase the operating frequency of the second outdoor unit.
Specifically, since the operating frequency control of the outdoor unit is mainly determined according to the target low pressure interval, that is, when the actual low pressure is greater than the target low pressure upper limit, the frequency raising control is performed, when the actual low pressure is less than the target low pressure lower limit, the frequency lowering control is performed, and when the actual low pressure meets the target low pressure interval, the current frequency is maintained, so that in order to increase the operating frequency of the second outdoor unit, the target low pressure interval of the second outdoor unit needs to be reduced, that is, the target low pressure interval of the second outdoor unit needs to be adjusted downwards according to the preset adjustment value, so that the actual low pressure value of the second outdoor unit is higher than the adjusted target low pressure upper limit, thereby improving the operating frequency of the second outdoor unit.
Wherein, the value range of the preset adjustment value X is 1-10, preferably 3. It should be noted that, for the plurality of second outdoor units, the corresponding target low-pressure intervals are adjusted according to the preset adjustment values X respectively; and in the down-regulation process, the preset adjustment value X of each second outdoor unit may be the same or different, and may specifically be set according to the actual situation.
Further, the method comprises the following steps: in the independent control mode, setting first priority information of the first outdoor unit and second priority information of the second outdoor unit; wherein the second priority information is higher than the first priority information. In consideration of wear and oil distribution of the multi-connected unit, the controller preferentially controls the second outdoor unit which is not blocked to operate in a single control mode so as to ensure the output capacity of the multi-connected unit; and after the capacity requirement is met, the first outdoor unit which is blocked is controlled to operate, so that the comfort of the multi-split air conditioner is improved, and the reliability of the multi-split air conditioner is also improved.
To sum up, in order to improve the overall output capability of the multi-split air conditioner, two main ways are included: one way is to increase the operating frequency of the second outdoor unit, mainly by down-regulating the target low-pressure zone of the second outdoor unit; the second mode is to control the second outdoor unit to operate preferentially, and control the first outdoor unit to operate after the output capacity is guaranteed, so that the comfort of the multi-split air conditioner is improved, and the reliability of the multi-split air conditioner is also improved.
According to the multi-split air conditioner blockage control method provided by the embodiment of the invention, when the multi-split air conditioner is in refrigeration operation, whether the corresponding outdoor unit is blocked or not is judged according to the operation parameters; if so, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode; in the independent control mode, the target low-pressure interval of the second outdoor unit is adjusted downwards according to a preset adjusting value so as to increase the operating frequency of the second outdoor unit; in the control mode, whether the corresponding outdoor unit is blocked or not is judged through the operation parameters, and when the first outdoor unit is blocked, the operation frequency of the second outdoor unit is increased, so that the integral capacity of the multi-split air conditioner is improved, the reliable operation of the multi-split air conditioner is ensured, and the comfort level of a user is improved.
Furthermore, the method comprises the following steps: and generating alarm information of the first outdoor unit to prompt maintenance personnel to maintain the first outdoor unit. The controller also generates alarm information corresponding to the blockage fault for the first outdoor unit with blockage, so that a maintainer can determine that the valve of the outdoor unit is blocked according to the alarm information, and timely maintain the outdoor unit.
For easy understanding, the multi-split air conditioner is described herein as including 3 outdoor units connected in parallel. When the multi-split air conditioner operates stably in the refrigeration mode for 30min, the operation parameters of each outdoor unit are obtained, the low-pressure value of the No.1 outdoor unit is 4.64bar, the exhaust temperature is 105.7 ℃, the high-pressure value is 22.37bar, the fan rotating speed is 555rpm, and the operation frequency is 55Hz; the low pressure value of the No.2 outdoor unit is 9.49bar, the exhaust temperature is 75 ℃, the high pressure value is 24.19bar, the rotating speed of the fan is 1005rpm, and the operating frequency is 55Hz; the 3# outdoor unit had a low pressure of 9.45bar, a discharge temperature of 73 c, a high pressure of 24.32bar, a fan speed of 1005rpm, and an operating frequency of 55Hz.
As is clear from an analysis of the above-described operation parameters of the 3 outdoor units, the large valve of the #1 outdoor unit was blocked, and the # 2 outdoor unit and the # 3 outdoor unit were not blocked. Meanwhile, since the discharge temperature of the 1# outdoor unit is high, the operating frequencies of the 2# outdoor unit and the 3# outdoor unit cannot be increased. At this time, the target low pressure interval of the 2# outdoor unit and the 3# outdoor unit is adjusted down from [0,3] to [ -4, -1] by the preset adjustment value X (where X is 4), and the operating frequencies of the 2# outdoor unit and the 3# outdoor unit are both increased from 55Hz to 90Hz in the individual control mode without being affected by the discharge of the 1# outdoor unit. And, the priorities of the 2# outdoor unit and the 3# outdoor unit are higher than those of the 1# outdoor unit, i.e., the partial loads are only the 2# outdoor unit and the 3# outdoor unit. Meanwhile, the failure alarm information of the No. 1 outdoor unit is sent to after-sales maintenance personnel, so that the maintenance personnel can maintain the No. 1 outdoor unit in time.
In summary, the multi-connected air conditioner blockage control method provided by the embodiment of the invention obtains the operation parameters of each outdoor unit, intelligently judges whether the outdoor unit is blocked according to the operation parameters, and redistributes the output capacity of the outdoor unit by increasing the operation frequency of the second outdoor unit when the first outdoor unit is blocked, so as to ensure the output of the outdoor side component to the maximum extent, and informs the maintenance personnel of the blocked first outdoor unit, so that the maintenance personnel can maintain the blocked outdoor unit in time.
Corresponding to the embodiment of the method, the embodiment of the invention also provides a multi-split blocking control device which is applied to a controller of the multi-split; the multi-split air conditioner further comprises an outdoor side assembly which is in communication connection with the controller, and the outdoor side assembly comprises a plurality of outdoor units which are connected in parallel. As shown in fig. 3, the apparatus includes: the device comprises an acquisition module 31, a judgment module 32, a switching module 33 and an adjustment module 34; wherein, the functions of each module are as follows:
The obtaining module 31 is configured to obtain an operation parameter of each outdoor unit if the multi-split air conditioner is in refrigeration operation; the operation parameters comprise a low pressure value, an exhaust temperature, a high pressure value and a fan rotating speed;
A judging module 32, configured to judge whether a corresponding outdoor unit is blocked according to the operation parameters;
A switching module 33, configured to switch the first outdoor unit and the second outdoor unit from the parallel control mode to the individual control mode, if yes, using the outdoor unit having the blockage as the first outdoor unit and using the outdoor unit having no blockage as the second outdoor unit;
The adjusting module 34 is configured to, in the single control mode, adjust the target low pressure interval of the second outdoor unit according to a preset adjustment value, so as to increase the operating frequency of the second outdoor unit.
According to the multi-split blocking control device provided by the embodiment of the invention, when the multi-split refrigerating operation is performed, whether the corresponding outdoor unit is blocked or not is judged according to the operation parameters; if so, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode; in the independent control mode, the target low-pressure interval of the second outdoor unit is adjusted downwards according to a preset adjusting value so as to increase the operating frequency of the second outdoor unit; in the control mode, whether the corresponding outdoor unit is blocked or not is judged through the operation parameters, and when the first outdoor unit is blocked, the operation frequency of the second outdoor unit is increased, so that the integral capacity of the multi-split air conditioner is improved, the reliable operation of the multi-split air conditioner is ensured, and the comfort level of a user is improved.
Preferably, the apparatus further comprises: in the independent control mode, setting first priority information of the first outdoor unit and second priority information of the second outdoor unit; wherein the second priority information is higher than the first priority information.
Preferably, the judging module 32 is further configured to: for each outdoor unit, judging: (1) Whether the sum of the low-voltage value and the first preset value is smaller than the low-voltage average value of all the outdoor units or not; (2) Whether the exhaust temperature is greater than the sum of the average exhaust value of all the outdoor units and a second preset value; (3) Whether the sum of the high pressure value and the third preset value is smaller than the maximum high pressure value of all the outdoor units; (4) Whether the sum of the fan rotating speed and the fourth preset value is smaller than the maximum value of the fan rotating speeds of all the outdoor units; if the above (1) - (4) are all yes, the corresponding outdoor unit is blocked.
Preferably, the first preset value is 1bar, the second preset value is 25 ℃, the third preset value is 2bar, and the fourth preset value is 500rpm.
Preferably, the apparatus further comprises: and generating alarm information of the first outdoor unit to prompt maintenance personnel to maintain the first outdoor unit.
Preferably, the preset adjustment value is 3.
The multi-split blocking control device provided by the embodiment of the invention has the same technical characteristics as the multi-split blocking control method provided by the embodiment, so that the same technical problems can be solved, and the same technical effects can be achieved.
The embodiment of the invention also provides a multi-split air conditioner, which comprises a processor and a memory, wherein the memory stores machine executable instructions which can be executed by the processor, and the processor executes the machine executable instructions to realize the multi-split air conditioner blocking control method.
Referring to fig. 4, the multi-split air conditioner includes a processor 100 and a memory 101, wherein the memory 101 stores machine executable instructions executable by the processor 100, and the processor 100 executes the machine executable instructions to implement the multi-split air conditioner blocking control method.
Further, the multi-split air conditioner shown in fig. 4 further includes a bus 102 and a communication interface 103, and the processor 100, the communication interface 103 and the memory 101 are connected through the bus 102.
The memory 101 may include a high-speed random access memory (RAM, random Access Memory), and may further include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is implemented via at least one communication interface 103 (which may be wired or wireless), and may use the internet, a wide area network, a local network, a metropolitan area network, etc. Bus 102 may be an ISA (Industrial Standard Architecture, industry standard architecture) bus, PCI (PERIPHERAL COMPONENT INTERCONNECT, peripheral component interconnect standard) bus, or EISA (Enhanced Industry Standard Architecture, extended industry standard architecture) bus, among others. The buses may be classified into address buses, data buses, control buses, and the like. For ease of illustration, only one bi-directional arrow is shown in FIG. 4, but not only one bus or type of bus.
The processor 100 may be an integrated circuit chip with signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in the processor 100 or by instructions in the form of software. The processor 100 may be a general-purpose processor, including a central processing unit (Central Processing Unit, abbreviated as CPU), a network processor (Network Processor, abbreviated as NP), etc.; but may also be a digital signal Processor (DIGITAL SIGNAL Processor, DSP), application Specific Integrated Circuit (ASIC), field-Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware components. The disclosed methods, steps, and logic blocks in the embodiments of the present invention may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present invention may be embodied directly in the execution of a hardware decoding processor, or in the execution of a combination of hardware and software modules in a decoding processor. The software modules may be located in a random access memory, flash memory, read only memory, programmable read only memory, or electrically erasable programmable memory, registers, etc. as well known in the art. The storage medium is located in the memory 101, and the processor 100 reads the information in the memory 101 and, in combination with its hardware, performs the steps of the method of the previous embodiment.
The embodiment also provides a machine-readable storage medium, wherein the machine-readable storage medium stores machine-executable instructions, and when the machine-executable instructions are called and executed by a processor, the machine-executable instructions cause the processor to realize the multi-online blocking control method.
The multi-split blocking control method, the multi-split blocking control device and the multi-split computer program product provided by the embodiment of the invention comprise a computer readable storage medium storing program codes, the instructions included in the program codes can be used for executing the method described in the method embodiment, and specific implementation can be seen in the method embodiment and will not be repeated here.
It will be clear to those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described system and apparatus may refer to corresponding procedures in the foregoing method embodiments, which are not described herein again.
In addition, in the description of embodiments of the present invention, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a non-volatile computer readable storage medium executable by a processor. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a usb disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In the description of the present invention, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Finally, it should be noted that: the above examples are only specific embodiments of the present invention, and are not intended to limit the scope of the present invention, but it should be understood by those skilled in the art that the present invention is not limited thereto, and that the present invention is described in detail with reference to the foregoing examples: any person skilled in the art may modify or easily conceive of the technical solution described in the foregoing embodiments, or perform equivalent substitution of some of the technical features, while remaining within the technical scope of the present disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention, and are intended to be included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A multi-split blocking control method is characterized by being applied to a controller of the multi-split; the multi-split air conditioner further comprises an outdoor side assembly in communication connection with the controller, wherein the outdoor side assembly comprises a plurality of outdoor units connected in parallel, and the method comprises the following steps:
If the multi-split air conditioner operates in a refrigerating mode, acquiring operation parameters of each outdoor unit; wherein the operating parameters include a low pressure value, an exhaust temperature, a high pressure value, and a fan speed;
judging whether the corresponding outdoor unit is blocked or not according to the operation parameters;
If so, taking the outdoor unit with the blockage as a first outdoor unit, taking the outdoor unit without the blockage as a second outdoor unit, and switching the first outdoor unit and the second outdoor unit from a parallel control mode to a single control mode;
In the independent control mode, the target low-pressure interval of the second outdoor unit is adjusted downwards according to a preset adjusting value so as to increase the operating frequency of the second outdoor unit;
The step of judging whether the corresponding outdoor unit is blocked according to the operation parameters comprises the following steps: for each outdoor unit, judging: (1) Whether the sum of the low-voltage value and the first preset value is smaller than the low-voltage average value of all the outdoor units or not; (2) Whether the exhaust temperature is greater than the sum of the average exhaust value of all the outdoor units and a second preset value; (3) Whether the sum of the high pressure value and the third preset value is smaller than the maximum high pressure value of all the outdoor units; (4) Whether the sum of the fan rotating speed and the fourth preset value is smaller than the maximum value of the fan rotating speeds of all the outdoor units; if the above (1) - (4) are all yes, the corresponding outdoor unit is blocked.
2. The method according to claim 1, wherein the method further comprises:
setting first priority information of the first outdoor unit and second priority information of the second outdoor unit in the individual control mode; wherein the second priority information is higher than the first priority information.
3. The method according to claim 1, wherein the first preset value is 1bar, the second preset value is 25 ℃, the third preset value is 2bar, and the fourth preset value is 500rpm.
4. The method according to claim 1, wherein the method further comprises:
And generating alarm information of the first outdoor unit to prompt maintenance personnel to maintain the first outdoor unit.
5. The method of claim 1, wherein the preset adjustment value is 3.
6. The multi-split blocking control device is characterized by being applied to a controller of the multi-split; the multi-split air conditioner further comprises an outdoor side assembly in communication connection with the controller, wherein the outdoor side assembly comprises a plurality of outdoor units connected in parallel, and the device comprises:
The acquisition module is used for acquiring the operation parameters of each outdoor unit if the multi-split air conditioner operates in a refrigerating mode; wherein the operating parameters include a low pressure value, an exhaust temperature, a high pressure value, and a fan speed;
the judging module is used for judging whether the corresponding outdoor unit is blocked or not according to the operation parameters;
A switching module, configured to take the outdoor unit with the blockage as a first outdoor unit, take the outdoor unit without the blockage as a second outdoor unit, and switch the first outdoor unit and the second outdoor unit from a parallel control mode to an independent control mode if the blockage occurs;
The adjusting module is used for adjusting the target low-pressure interval of the second outdoor unit downwards according to a preset adjusting value under an independent control mode so as to increase the operating frequency of the second outdoor unit;
Wherein, the judging module is used for: for each outdoor unit, judging: (1) Whether the sum of the low-voltage value and the first preset value is smaller than the low-voltage average value of all the outdoor units or not; (2) Whether the exhaust temperature is greater than the sum of the average exhaust value of all the outdoor units and a second preset value; (3) Whether the sum of the high pressure value and the third preset value is smaller than the maximum high pressure value of all the outdoor units; (4) Whether the sum of the fan rotating speed and the fourth preset value is smaller than the maximum value of the fan rotating speeds of all the outdoor units; if the above (1) - (4) are all yes, the corresponding outdoor unit is blocked.
7. The apparatus of claim 6, wherein the apparatus further comprises:
setting first priority information of the first outdoor unit and second priority information of the second outdoor unit in the individual control mode; wherein the second priority information is higher than the first priority information.
8. A multi-split machine comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the processor implements the steps of the method of any of the preceding claims 1-5 when executing the computer program.
9. A computer-readable storage medium, characterized in that it has stored thereon a computer program which, when executed by a processor, performs the steps of the method according to any of the preceding claims 1-5.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023424A (en) * | 2019-12-27 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and system and air conditioner |
| CN113091207A (en) * | 2021-05-10 | 2021-07-09 | 宁波奥克斯电气股份有限公司 | Air return port blockage judging method and device and air conditioner |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100631540B1 (en) * | 2004-10-26 | 2006-10-09 | 엘지전자 주식회사 | Gas-pipes cut-off detection system and method for heat pump type multi air conditioner |
| KR20140141127A (en) * | 2013-05-31 | 2014-12-10 | 삼성전자주식회사 | Diagnosis method of air conditioner |
| US11137157B2 (en) * | 2017-09-18 | 2021-10-05 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Method for controlling multi-split air conditioner, multi-split air conditioner system, and computer-readable storage medium |
| CN107676933B (en) * | 2017-09-18 | 2019-09-20 | 广东美的暖通设备有限公司 | Control method, system and the computer readable storage medium of multi-connected air conditioner |
| CN109297136B (en) * | 2018-11-14 | 2021-02-02 | 宁波奥克斯电气股份有限公司 | Expansion valve blockage judging method and air conditioner |
| CN110410936B (en) * | 2019-07-23 | 2021-07-30 | 宁波奥克斯电气股份有限公司 | Multi-split system fault detection method and device and multi-split system |
| CN111023429B (en) * | 2019-12-27 | 2022-06-14 | 宁波奥克斯电气股份有限公司 | Control method and system and air conditioner |
| CN113339944A (en) * | 2021-05-10 | 2021-09-03 | 广东Tcl智能暖通设备有限公司 | Air conditioning system blockage detection method and device, storage medium and air conditioning system |
| CN113432254B (en) * | 2021-06-18 | 2022-11-15 | Tcl空调器(中山)有限公司 | Air conditioner blockage identification method and device, air conditioner and readable storage medium |
| CN113834180B (en) * | 2021-10-19 | 2022-07-08 | 宁波奥克斯电气股份有限公司 | Self-adaptive method, device and system for multi-split long-connected pipe output |
| CN114877488A (en) * | 2022-05-23 | 2022-08-09 | 青岛海信日立空调***有限公司 | Air conditioning system and filth blockage determining method thereof |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111023424A (en) * | 2019-12-27 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Control method and system and air conditioner |
| CN113091207A (en) * | 2021-05-10 | 2021-07-09 | 宁波奥克斯电气股份有限公司 | Air return port blockage judging method and device and air conditioner |
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