CN113280465B - Air conditioner control method and device and air conditioning unit - Google Patents
Air conditioner control method and device and air conditioning unit Download PDFInfo
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- CN113280465B CN113280465B CN202110656987.2A CN202110656987A CN113280465B CN 113280465 B CN113280465 B CN 113280465B CN 202110656987 A CN202110656987 A CN 202110656987A CN 113280465 B CN113280465 B CN 113280465B
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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
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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
- F24F11/70—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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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Abstract
The invention discloses an air conditioner control method, an air conditioner control device and an air conditioner unit, wherein the method comprises the following steps: detecting whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner; when the multi-cylinder compressor can meet the current capacity requirement, determining the first cylinder number of the multi-cylinder compressor meeting the current capacity requirement; and determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number, and controlling the operation of the multi-cylinder compressor according to the second cylinder number. The invention solves the problem that the energy efficiency of the multi-cylinder compressor in the prior art is difficult to maintain in an optimal state, not only can meet the requirements of a unit, but also effectively improves the energy efficiency of an air conditioner.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioner control method and device and an air conditioning unit.
Background
With the rapid development of economy and the gradual improvement of living standard of people, the refrigeration field is rapidly developed. The rotor compressor can meet the requirements of a plurality of temperature areas from high temperature to low temperature, and is widely applied to the refrigeration field of household air conditioners and the like. For the multi-cylinder rotor compressor, because the plurality of cylinder bodies are arranged in an overlapping mode, two or multi-stage compression can be realized, idling of part of the cylinder bodies can be realized, the heating effect at low temperature can be improved, the operation energy efficiency under low working conditions can be improved, and the multi-cylinder rotor compressor is increasingly researched in air conditioner application in recent years.
However, in the actual use process, the time-to-time ratio of the full-load operation of the multi-split air-conditioning system is not high, and the multi-split air-conditioning system does not operate at the optimal energy efficiency point of the compressor, so that the energy efficiency of the operation of the air conditioner is not in the optimal state. Meanwhile, in a multi-split system, when the compressor is reduced to the lowest frequency during low-load operation, the condition that the trolley is pulled by the large horse still exists.
Aiming at the problem that the energy efficiency of a multi-cylinder compressor in the related technology is difficult to maintain the optimal state, an effective solution is not provided at present.
Disclosure of Invention
The invention provides an air conditioner control method, an air conditioner control device and an air conditioning unit, and at least solves the problem that the energy efficiency of a multi-cylinder compressor in the prior art is difficult to maintain in an optimal state.
In order to solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioner control method, where a compressor of an air conditioner is a multi-cylinder compressor, the method including: detecting whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner; when the multi-cylinder compressor can meet the current capacity requirement, determining the first cylinder number of the multi-cylinder compressor meeting the current capacity requirement; and determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number, and controlling the operation of the multi-cylinder compressor according to the second cylinder number.
Further, whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner or not is detected, and the method comprises the following steps: acquiring the operation capacity range of the multi-cylinder compressor corresponding to each cylinder number; determining the current capacity requirement of the air conditioner; judging whether the current capacity requirement is within the operation capacity range corresponding to each cylinder number; if so, determining that the multi-cylinder compressor can meet the current capacity requirement of the air conditioner; otherwise, determining that the multi-cylinder compressor cannot meet the current capacity requirement of the air conditioner.
Further, determining a current capacity demand of the air conditioner includes: acquiring the capacity requirement of the started internal machine; and detecting a difference value between the set temperature of the air conditioner and the current environment temperature, and correcting the capacity requirement of the started internal machine according to the difference value to be used as the current capacity requirement.
Further, correcting the capacity requirement of the started internal machine according to the difference value, comprising: determining a corresponding correction coefficient according to the difference; and calculating the product of the correction coefficient and the capability requirement of the started internal machine as the current capability requirement.
Further, determining a first number of cylinders of the multi-cylinder compressor to meet a current capacity requirement includes: and determining the number of cylinders including the current capacity requirement in the operation capacity range corresponding to each cylinder number as a first cylinder number.
Further, determining a second cylinder number corresponding to the optimal energy efficiency from among the first cylinder numbers includes: determining the operating frequency of each cylinder number in the first cylinder number, which can meet the current capacity requirement; judging whether the operating frequency has the frequency with the best energy efficiency; if yes, determining the number of cylinders corresponding to the frequency with the best energy efficiency as a second number of cylinders; and if the first number of cylinders does not exist, determining that the maximum number of cylinders in the first number of cylinders is the second number of cylinders.
Further, after determining a first number of cylinders of the multi-cylinder compressor to meet the current capacity demand, the method further comprises the following steps: determining whether the reliability requirement is met when the multi-cylinder compressor operates according to the first cylinder number; if so, determining the number of cylinders of the multi-cylinder compressor meeting the reliability requirement as a first number of cylinders, and then triggering to determine a second number of cylinders corresponding to the optimal energy efficiency in the first number of cylinders; otherwise, controlling the single-cylinder operation of the multi-cylinder compressor.
Further, determining whether the reliability requirement is met when the multi-cylinder compressor operates according to the first cylinder number comprises: detecting operation parameters when the multi-cylinder compressor operates according to a first cylinder number; wherein the operating parameters include at least one of: exhaust temperature, exhaust superheat degree, suction temperature and suction superheat degree; judging whether the operation parameters exceed corresponding preset values or not; if so, determining that the reliability requirement cannot be met; otherwise, it is determined that the reliability requirement can be met.
Further, still include: when the multi-cylinder compressor cannot meet the current capacity requirement, judging whether the current capacity requirement is too small or not or whether the current capacity requirement is too large; if the pressure is too small, controlling the single cylinder operation of the multi-cylinder compressor; and if the maximum cylinder number is too large, controlling the multi-cylinder compressor to operate according to the maximum cylinder number.
Further, after controlling the operation of the multi-cylinder compressor according to the second cylinder number, the method further comprises the following steps: detecting the variable quantity of the current environment temperature; and correcting the current capacity requirement according to the variable quantity.
According to another aspect of the embodiments of the present invention, there is provided an air conditioner control device, a compressor of an air conditioner is a multi-cylinder compressor, the device including: the detection module is used for detecting whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner; the determining module is used for determining the first cylinder number of the multi-cylinder compressor meeting the current capacity requirement when the multi-cylinder compressor can meet the current capacity requirement; and the control module is used for determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number and controlling the operation of the multi-cylinder compressor according to the second cylinder number.
According to another aspect of the embodiment of the invention, an air conditioning unit is provided, which comprises the air conditioning control device.
According to still another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning control method as described above when executed by a computer processor.
In the invention, aiming at the problem that the energy efficiency of a multi-cylinder compressor is difficult to maintain in an optimal state, an air conditioner control method is provided, when the multi-cylinder compressor can meet the current capacity requirement, a first cylinder number of the multi-cylinder compressor meeting the current capacity requirement is determined, a second cylinder number corresponding to the optimal energy efficiency is determined in the first cylinder number, and the operation of the multi-cylinder compressor is controlled according to the second cylinder number. In the mode, the number of the operating cylinders of the multi-cylinder compressor can meet the requirement of the unit, the multi-cylinder compressor can operate at the optimal energy efficiency point when the multi-cylinder compressor operates at partial load, and the energy efficiency of the air conditioner is effectively improved.
Drawings
Fig. 1 is an alternative flowchart of an air conditioner control method according to an embodiment of the present invention;
fig. 2 is another alternative flowchart of an air conditioner control method according to an embodiment of the present invention;
fig. 3 is another alternative flowchart of an air conditioner control method according to an embodiment of the present invention; and
fig. 4 is a block diagram of an alternative configuration of an air conditioning control apparatus according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, there is provided an air conditioning control method which can be directly applied to various air conditioning units having a multi-cylinder compressor. In particular, fig. 1 shows an alternative flow chart of the method, which, as shown in fig. 1, comprises the following steps S102-S106:
s102: detecting whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner;
s104: when the multi-cylinder compressor can meet the current capacity requirement, determining the first cylinder number of the multi-cylinder compressor meeting the current capacity requirement;
s106: and determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number, and controlling the operation of the multi-cylinder compressor according to the second cylinder number.
In the above embodiment, in order to solve the problem that the energy efficiency of the multi-cylinder compressor is difficult to maintain in the optimal state, an air conditioner control method is provided, where when the multi-cylinder compressor can meet the current capacity requirement, a first number of cylinders of the multi-cylinder compressor meeting the current capacity requirement is determined, a second number of cylinders corresponding to the optimal energy efficiency is determined in the first number of cylinders, and the operation of the multi-cylinder compressor is controlled according to the second number of cylinders. In the mode, the number of the operating cylinders of the multi-cylinder compressor can meet the requirement of the unit, the multi-cylinder compressor can operate at the optimal energy efficiency point when the multi-cylinder compressor operates at partial load, and the energy efficiency of the air conditioner is effectively improved.
Whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner or not is detected, and the method comprises the following steps: acquiring the operation capacity range of the multi-cylinder compressor corresponding to each cylinder number; determining the current capacity requirement of the air conditioner; judging whether the current capacity requirement is within the operation capacity range corresponding to each cylinder number; if so, determining that the multi-cylinder compressor can meet the current capacity requirement of the air conditioner; otherwise, determining that the multi-cylinder compressor cannot meet the current capacity requirement of the air conditioner. The process firstly determines whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner, and when the current capacity requirement can be met, the next step of determining the optimal operation cylinder number, namely the second cylinder number, is carried out. Particularly, for the condition that the multi-cylinder compressor cannot meet the current capacity requirement, judging whether the current capacity requirement is too small or whether the current capacity requirement is too large; if the pressure is too small, controlling the single cylinder operation of the multi-cylinder compressor; and if the maximum cylinder number is too large, controlling the multi-cylinder compressor to operate according to the maximum cylinder number.
The method for determining the current capacity requirement of the air conditioner comprises the following steps: acquiring the capacity requirement of the started internal machine; and detecting a difference value between the set temperature of the air conditioner and the current environment temperature, and correcting the capacity requirement of the started internal machine according to the difference value to be used as the current capacity requirement. Correcting the capacity requirement of the started internal machine according to the difference value, wherein the correction comprises the following steps: determining a corresponding correction coefficient according to the difference; and calculating the product of the correction coefficient and the capability requirement of the started internal machine as the current capability requirement. For example, for a multi-split product, an outer unit is a capacity 16kw unit, an inner unit is collocated with a 4.0kw +5.0kw +7.1kw unit, an on-off inner unit is 4.0kw +5.0kw, the difference between the set temperature and the ambient temperature is 10 ℃, and the correction coefficient is 1.2 (if the difference between the set temperature and the ambient temperature is less than 5 ℃, the correction coefficient is 0.8, if the difference between 5 ℃ and 8 ℃ is less than 8 ℃, the correction coefficient is 1, the difference is more than 8 ℃, and the correction coefficient is 1.2), the capacity requirement of the outer unit is (4.0+5.0) × 1.2 ═ 10.8 kw.
After determining the current capacity demand, determining a first number of cylinders of the multi-cylinder compressor that meet the current capacity demand, comprising: and determining the number of cylinders including the current capacity requirement in the operation capacity range corresponding to each cylinder number as a first cylinder number.
Then, determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number specifically includes: determining the operating frequency of each cylinder number in the first cylinder number, which can meet the current capacity requirement; judging whether the operating frequency has the frequency with the optimal energy efficiency; if yes, determining the number of cylinders corresponding to the frequency with the best energy efficiency as a second number of cylinders; and if not, determining that the maximum cylinder number in the first cylinder number is the second cylinder number. The multi-cylinder compressor runs according to a certain running frequency when running with different cylinder numbers so as to meet the current capacity requirement. However, this frequency is not necessarily the frequency with the best energy efficiency, and therefore, if there is a frequency with the best energy efficiency, the number of cylinders corresponding to this frequency is determined as the second number of cylinders, and if there is no frequency with the best energy efficiency, the maximum number of cylinders among the first number of cylinders is determined as the second number of cylinders, and further, the multi-cylinder compressor is operated at a low frequency, thereby improving the energy efficiency.
When the multi-cylinder compressor cannot meet the current capacity requirement, judging whether the current capacity requirement is too small or not or whether the current capacity requirement is too large; if the pressure is too small, controlling the single cylinder operation of the multi-cylinder compressor; and if the maximum cylinder number is too large, controlling the multi-cylinder compressor to operate according to the maximum cylinder number. The above solution enables to meet the current capacity requirements as best as possible. For single-cylinder operation of the multi-cylinder compressor, if the output capacity of the multi-cylinder compressor is still larger than the current operation capacity, the energy efficiency is improved by adjusting the operation frequency of the multi-cylinder compressor, mainly in a mode of reducing the frequency.
After controlling the operation of the multi-cylinder compressor according to the second cylinder number, the method further comprises the following steps: detecting the variable quantity of the current environment temperature; and correcting the current capacity requirement according to the variable quantity. For example, when the difference between the ambient temperature and the set temperature decreases by a certain amount, the current capacity requirement is multiplied by a corresponding coefficient.
The scheme mainly considers the problem that the cylinder number and the frequency of the multi-cylinder compressor meet the current capacity requirement, and in addition, the invention also considers the reliability problem of the multi-cylinder compressor. After determining the first cylinder number of the multi-cylinder compressor meeting the current capacity requirement, the method further comprises the following steps: determining whether the reliability requirement is met when the multi-cylinder compressor operates according to the first cylinder number; if so, determining the number of cylinders of the multi-cylinder compressor meeting the reliability requirement as a first number of cylinders, and then triggering to determine a second number of cylinders corresponding to the optimal energy efficiency in the first number of cylinders; otherwise, controlling the single-cylinder operation of the multi-cylinder compressor. The operation frequency of the multi-cylinder compressor with single-cylinder operation can be improved, and the reliability of the multi-cylinder compressor can be ensured although the energy efficiency is not optimal.
Wherein, confirm whether multi-cylinder compressor satisfies the reliability demand when according to the operation of first jar number, include: detecting operation parameters when the multi-cylinder compressor operates according to a first cylinder number; wherein the operating parameters include at least one of: exhaust temperature, exhaust superheat degree, suction temperature and suction superheat degree; judging whether the operation parameters exceed corresponding preset values or not; if so, determining that the reliability requirement cannot be met; otherwise, it is determined that the reliability requirement can be met.
Another air conditioner control method is further provided in preferred embodiment 1 of the present invention, specifically, fig. 2 shows an alternative flowchart of the method, and as shown in fig. 2, the method includes the following steps S201 to S210:
s201: calculating the capacity range of the 1-n cylinder compressor; in the above embodiment, the single-cylinder operation, 2-cylinder operation to n-cylinder operation capability ranges (for example, the single-cylinder operation capability range is 1kw to 5kw, the 2-cylinder operation pressure capability range is 2.5kw to 8kw, the 3-cylinder operation capability range is 5kw to 12kw, the 4-cylinder operation capability range is 6kw to 14kw, and so on) are calculated according to the number of multi-cylinder compressor cylinders and the configuration of the multi-split system.
S202: calculating the current capacity requirement; and calculating the capacity requirement of the current outdoor unit according to the number of the started indoor units and the difference value between the set temperature and the current environment temperature.
S203: judging whether the frequency range of the 1-n cylinder compressor meets the current capacity requirement or not; whether the frequency range of the 1-n cylinder compressor includes the current capacity demand, if so, the process proceeds to S206, and if not, the frequency range is divided into a case S205 where the frequency range is smaller than the current capacity demand and a case S204 where the frequency range is larger than the current capacity demand.
S204: if the current capacity requirement is too small, the compressor operates in a single cylinder;
s205: if the current capacity requirement is overlarge, the n cylinders of the compressor are operated;
s206: selecting the number a-b (a is more than or equal to 1 and b is more than or equal to n) of the compressor cylinders meeting the current capacity requirement; and screening the range of the number of the operating cylinders (a is more than or equal to 1 and less than b and less than or equal to n) of the multi-cylinder compressor meeting the capacity according to the current capacity requirement, namely screening the number of the cylinders of which the operating capacity range covers the current capacity requirement.
S207: whether the compressor optimal energy efficiency point frequency exists or not; and according to the current capacity requirement, calculating the cylinder number of the multi-cylinder compressor in the range of [ a, b ] to find the frequency of the optimal energy efficiency of the multi-cylinder compressor.
S208: if not, the compressor b cylinder is operated; if the optimal energy efficiency point frequency does not exist, the multi-cylinder compressor is operated according to the number b of cylinders (namely, the maximum number of operating cylinders within the range meeting the capability and the reliability, so that the operating frequency of the multi-cylinder compressor is low, and the energy efficiency is improved).
S209: if the optimal energy efficiency point exists, the optimal energy efficiency point corresponds to the number of the cylinders of the compressor to operate; and if the energy efficiency point frequency exists, the multi-cylinder compressor operates according to the cylinder number of the multi-cylinder compressor corresponding to the optimal energy efficiency point frequency.
S210: detecting the change of the ring temperature; returning to S202. In the operation process, the current capacity requirement is corrected in real time along with the change of the environmental temperature, and therefore the multi-cylinder compressor is guaranteed to operate at the optimal energy efficiency point all the time.
Another air conditioner control method is further provided in preferred embodiment 1 of the present invention, and specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S301 to S312:
s301: calculating the capacity range of the 1-n cylinder compressor; in the above embodiment, the single-cylinder operation, 2-cylinder operation to n-cylinder operation capability ranges (for example, the single-cylinder operation capability range is 1kw to 5kw, the 2-cylinder operation pressure capability range is 2.5kw to 8kw, the 3-cylinder operation capability range is 5kw to 12kw, the 4-cylinder operation capability range is 6kw to 14kw, and so on) are calculated according to the number of multi-cylinder compressor cylinders and the configuration of the multi-split system.
S302: calculating the current capacity requirement; and calculating the capacity requirement of the current outdoor unit according to the number of the indoor units in the starting-up unit and the difference value between the set temperature and the current environment temperature.
S303: judging whether the frequency range of the 1-n cylinder compressor meets the current capacity requirement or not; and screening the operating cylinder number range (a is more than or equal to 1 and less than b and less than or equal to n) of the multi-cylinder compressor meeting the capacity according to the current capacity requirement. Whether the frequency range of the 1-n cylinder compressor includes the current capacity demand, if so, go to S306, if not, divide the frequency range into a case S305 where the frequency range is less than the current capacity demand and a case S304 where the frequency range is greater than the current capacity demand.
S304: if the current capacity requirement is too small, the compressor operates in a single cylinder;
s305: if the current capacity requirement is overlarge, the n cylinders of the compressor are operated;
s306: selecting the number a-b (a is more than or equal to 1 and b is more than or equal to n) of the compressor cylinders meeting the current capacity requirement; and screening the range of the number of the operating cylinders (a is more than or equal to 1 and less than b and less than or equal to n) of the multi-cylinder compressor meeting the capacity according to the current capacity requirement, namely screening the number of the cylinders of which the operating capacity range covers the current capacity requirement.
S307: judging whether the reliable operation of the compressor is met or not by combining the ring temperature; if the reliability is not high, the compressor operates in a single cylinder; and (2) judging whether the multi-cylinder compressors meet the problem of no reliability risk when the different multi-cylinder compressor cylinders operate according to the current capacity requirement by combining the current ring temperature (reliability judgment can be combined with parameters such as the exhaust temperature, the exhaust superheat degree, the suction temperature, the suction superheat degree and the like of the multi-cylinder compressors to judge whether the multi-cylinder compressors do not have the problem of reliability risk under the current requirement operation condition), and if not, operating the multi-cylinder compressors according to a horizontal bar (the operation frequency of the multi-cylinder compressors is improved when the multi-cylinder compressors operate by the single bar, and the reliability of the multi-cylinder compressors can be ensured although the energy efficiency is not optimal).
S308: selecting the number c-d (d is less than or equal to c, d is less than or equal to b) of the compressor cylinders meeting the current capacity requirement; if the requirement is met, selecting the number of the operating cylinders (a is more than or equal to 1 and less than or equal to c and d is more than or equal to d and less than or equal to b and less than or equal to n) of the multi-cylinder compressor meeting the exhaust superheat.
S309: whether the optimal energy efficiency point frequency of the compressor exists or not; and according to the current capacity requirement, calculating the cylinder number of the multi-cylinder compressor in the range of [ c, d ] to find the frequency of the optimal energy efficiency of the multi-cylinder compressor.
S310: if not, the compressor d cylinder is operated; if the cylinder number of the multi-cylinder compressor does not exist, the multi-cylinder compressor is operated according to the d cylinder number (namely, the maximum operation cylinder number within the range of meeting the capacity and the reliability is met, so that the multi-cylinder compressor is low in operation frequency, and the energy efficiency is improved).
S311: if the optimal energy efficiency point exists, the optimal energy efficiency point corresponds to the number of the cylinders of the compressor to operate; and if the energy efficiency point frequency exists, the multi-cylinder compressor operates according to the cylinder number of the multi-cylinder compressor corresponding to the optimal energy efficiency point frequency.
S312: detecting the change of the environmental temperature; returning to S302. In the operation process, the current capacity requirement is corrected in real time along with the change of the environmental temperature, so that the multi-cylinder compressor is ensured to operate at the optimal energy efficiency point all the time.
The invention realizes the operation of the multi-cylinder compressor at the optimal energy efficiency point during partial load operation by changing the number of the operating cylinder bodies of the multi-cylinder compressor, effectively solves the problem that the operating frequency of the multi-cylinder compressor is not at the optimal energy efficiency point during partial load of the same multi-split system, and also solves the problem that the multi-cylinder compressor is reduced to the lowest frequency but still has the condition of large horse-drawn trolley during low load operation.
Example 2
Based on the air conditioner control method provided in the foregoing embodiment 1, in a preferred embodiment 2 of the present invention, an air conditioner control device is further provided, and specifically, fig. 4 shows an alternative structural block diagram of the device, and as shown in fig. 4, the device includes:
a detecting module 402, configured to detect whether the multi-cylinder compressor can meet a current capacity requirement of the air conditioner;
the determining module 404 is configured to determine a first number of cylinders of the multi-cylinder compressor meeting the current capacity requirement when the multi-cylinder compressor can meet the current capacity requirement;
and the control module 406 is used for determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number, and controlling the operation of the multi-cylinder compressor according to the second cylinder number.
In the above embodiment, in order to solve the problem that the energy efficiency of the multi-cylinder compressor is difficult to maintain in the optimal state, an air conditioner control method is provided, where when the multi-cylinder compressor can meet the current capacity requirement, a first number of cylinders of the multi-cylinder compressor meeting the current capacity requirement is determined, a second number of cylinders corresponding to the optimal energy efficiency is determined in the first number of cylinders, and the operation of the multi-cylinder compressor is controlled according to the second number of cylinders. In the mode, the number of the operating cylinders of the multi-cylinder compressor can meet the requirement of the unit, the multi-cylinder compressor can operate at the optimal energy efficiency point when the multi-cylinder compressor operates at partial load, and the energy efficiency of the air conditioner is effectively improved.
The detection module 402 includes: the acquisition unit is used for acquiring the operation capacity range of the multi-cylinder compressor corresponding to each cylinder number; a first determination unit for determining a current capacity demand of the air conditioner; the first judgment unit is used for judging whether the current capacity requirement is located in the operation capacity range corresponding to each cylinder number; the second determining unit is used for determining that the multi-cylinder compressor can meet the current capacity requirement of the air conditioner if the multi-cylinder compressor can meet the current capacity requirement of the air conditioner; and the third determination unit is used for determining that the multi-cylinder compressor cannot meet the current capacity requirement of the air conditioner if not.
The first determination unit includes: the obtaining subunit is used for obtaining the capacity requirement of the started internal machine; and the correction subunit is used for detecting a difference value between the set temperature of the air conditioner and the current environment temperature, and correcting the capacity requirement of the started internal machine according to the difference value to serve as the current capacity requirement. The correction subunit includes: determining a corresponding correction coefficient according to the difference; and calculating the product of the correction coefficient and the capability requirement of the started internal machine as the current capability requirement.
The determination module 404 includes: and determining the number of cylinders including the current capacity requirement in the operation capacity range corresponding to each cylinder number as a first cylinder number.
The control module 406 includes: the fourth determining unit is used for determining the operating frequency of each cylinder number in the first cylinder number, which can meet the current capacity requirement; the second judgment unit is used for judging whether the frequency with the best energy efficiency exists in the operation frequencies; a fifth determining unit, configured to determine, if the frequency of the optimal energy efficiency corresponds to the second number of cylinders, that is, the number of cylinders corresponding to the frequency of the optimal energy efficiency is the second number of cylinders; a sixth determining unit configured to determine, if not present, that a maximum number of cylinders among the first number of cylinders is the second number of cylinders.
The device also comprises a reliability module, a first capacity module and a second capacity module, wherein the reliability module is used for determining whether the multi-cylinder compressor meets the reliability requirement when the multi-cylinder compressor runs according to the first cylinder number after determining that the multi-cylinder compressor meets the first cylinder number of the current capacity requirement; the single-cylinder module is used for controlling the single-cylinder operation of the multi-cylinder compressor if the single-cylinder operation is not the same as the single-cylinder operation; and the triggering module is used for determining the cylinder number of the multi-cylinder compressor meeting the reliability requirement as a first cylinder number if the first cylinder number is the first cylinder number, and then triggering to determine a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number.
The reliability module includes: the detection unit is used for detecting operation parameters when the multi-cylinder compressor operates according to a first cylinder number; wherein the operating parameters include at least one of: the exhaust temperature, the exhaust superheat degree, the suction temperature and the suction superheat degree; the third judging unit is used for judging whether the operation parameters exceed the corresponding preset values; a seventh determining unit for determining that the reliability requirement cannot be satisfied if yes; an eighth determining unit, configured to determine that the reliability requirement can be satisfied if not.
This device still includes feedback module, and feedback module includes: the fourth judging unit is used for judging whether the current capacity requirement is too small or not or whether the current capacity requirement is too large when the multi-cylinder compressor cannot meet the current capacity requirement; the first control unit is used for controlling the single-cylinder operation of the multi-cylinder compressor if the pressure is too small; and the second control unit is used for controlling the multi-cylinder compressor to operate according to the maximum cylinder number if the cylinder number is too large.
And the correction module is used for detecting the variation of the current environment temperature after controlling the operation of the multi-cylinder compressor according to the second cylinder number and correcting the current capacity requirement according to the variation.
With regard to the apparatus in the above embodiments, the specific manner in which each unit and each module performs operations has been described in detail in the embodiments related to the method, and will not be described in detail herein.
Example 3
Based on the air conditioning control device provided in the above embodiment 2, in a preferred embodiment 3 of the present invention, there is also provided an air conditioning unit including the air conditioning control device as described above.
In the above embodiment, in order to solve the problem that the energy efficiency of the multi-cylinder compressor is difficult to maintain in the optimal state, an air conditioner control method is provided, where when the multi-cylinder compressor can meet the current capacity requirement, a first number of cylinders of the multi-cylinder compressor meeting the current capacity requirement is determined, a second number of cylinders corresponding to the optimal energy efficiency is determined in the first number of cylinders, and the operation of the multi-cylinder compressor is controlled according to the second number of cylinders. In the mode, the number of the operating cylinders of the multi-cylinder compressor can meet the requirement of the unit, the multi-cylinder compressor can operate at the optimal energy efficiency point when the multi-cylinder compressor operates at partial load, and the energy efficiency of the air conditioner is effectively improved.
Example 4
Based on the air-conditioning control method provided in embodiment 1 above, there is also provided in preferred embodiment 4 of the present invention a storage medium containing computer-executable instructions for performing the air-conditioning control method as described above when executed by a computer processor.
In the above embodiment, in order to solve the problem that the energy efficiency of the multi-cylinder compressor is difficult to maintain in the optimal state, an air conditioner control method is provided, where when the multi-cylinder compressor can meet the current capacity requirement, a first number of cylinders of the multi-cylinder compressor meeting the current capacity requirement is determined, a second number of cylinders corresponding to the optimal energy efficiency is determined in the first number of cylinders, and the operation of the multi-cylinder compressor is controlled according to the second number of cylinders. In the mode, the number of the operating cylinders of the multi-cylinder compressor can meet the requirement of the unit, the multi-cylinder compressor can operate at the optimal energy efficiency point when the multi-cylinder compressor operates at partial load, and the energy efficiency of the air conditioner is effectively improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (12)
1. A control method of an air conditioner is characterized in that a compressor of the air conditioner is a multi-cylinder compressor, and the method comprises the following steps:
detecting whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner;
when the multi-cylinder compressor can meet the current capacity requirement, determining a first number of cylinders of the multi-cylinder compressor meeting the current capacity requirement; the first cylinder number is the number a-b of the compressor cylinders meeting the current capacity requirement, a is more than or equal to 1, b is less than or equal to n, and n is the maximum cylinder number of the compressor, namely the cylinder number of the compressor covering the current capacity requirement in the operation capacity range;
determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number, and controlling the operation of the multi-cylinder compressor according to the second cylinder number;
determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder numbers, wherein the second cylinder number comprises the following steps:
determining the operating frequency of each cylinder number in the first cylinder number, which can meet the current capacity requirement;
judging whether the operating frequency has the frequency with the best energy efficiency; according to the current capacity requirement, the frequency of the optimal energy efficiency of the multi-cylinder compressor is searched within the range of [ a, b ] according to the number of cylinders of the multi-cylinder compressor;
if so, determining the number of cylinders corresponding to the frequency with the optimal energy efficiency as the second number of cylinders;
and if the first number of cylinders does not exist, determining that the maximum number of cylinders in the first number of cylinders is the second number of cylinders.
2. The method of claim 1, wherein detecting whether the multi-cylinder compressor is capable of meeting the current capacity requirements of the air conditioner comprises:
acquiring the operating capacity range corresponding to each cylinder number of the multi-cylinder compressor;
determining a current capacity requirement of the air conditioner;
judging whether the current capacity requirement is within the operation capacity range corresponding to each cylinder number;
if so, determining that the multi-cylinder compressor can meet the current capacity requirement of the air conditioner;
otherwise, determining that the multi-cylinder compressor cannot meet the current capacity requirement of the air conditioner.
3. The method of claim 2, wherein determining the current capacity demand of the air conditioner comprises:
acquiring the capacity requirement of the started internal machine;
and detecting a difference value between the set temperature of the air conditioner and the current environment temperature, and correcting the capacity requirement of the started internal machine according to the difference value to be used as the current capacity requirement.
4. The method according to claim 3, wherein correcting the capability requirement of the started internal machine according to the difference value comprises:
determining a corresponding correction coefficient according to the difference;
and calculating the product of the correction coefficient and the capability requirement of the started internal machine as the current capability requirement.
5. The method of claim 2, wherein determining a first number of cylinders of the multi-cylinder compressor that meet the current capacity demand comprises:
and determining the number of cylinders including the current capacity requirement in the operation capacity range corresponding to each cylinder number as the first cylinder number.
6. The method of claim 1, after determining a first number of cylinders for the multi-cylinder compressor to meet the current capacity demand, further comprising:
determining whether the multi-cylinder compressor meets the reliability requirement when operating according to the first cylinder number;
if yes, determining the number of cylinders of the multi-cylinder compressor meeting the reliability requirement as the first number of cylinders, and triggering the second number of cylinders corresponding to the determined optimal energy efficiency in the first number of cylinders;
otherwise, controlling the multi-cylinder compressor to operate in a single cylinder.
7. The method of claim 6, wherein determining whether the reliability requirement is met when the multi-cylinder compressor is operating in accordance with the first number of cylinders comprises:
detecting operation parameters when the multi-cylinder compressor operates according to the first cylinder number; wherein the operating parameters include at least one of: exhaust temperature, exhaust superheat degree, suction temperature and suction superheat degree;
judging whether the operating parameters exceed corresponding preset values or not;
if so, determining that the reliability requirement cannot be met;
otherwise, it is determined that the reliability requirement can be met.
8. The method of claim 1, further comprising:
when the multi-cylinder compressor cannot meet the current capacity requirement, judging whether the current capacity requirement is too small or not or whether the current capacity requirement is too large;
if the pressure is too small, controlling the multi-cylinder compressor to operate in a single cylinder;
and if the maximum cylinder number is too large, controlling the multi-cylinder compressor to operate according to the maximum cylinder number.
9. The method of claim 1, further comprising, after controlling operation of the multi-cylinder compressor in accordance with the second cylinder number:
detecting the variable quantity of the current environment temperature;
and correcting the current capacity requirement according to the variable quantity.
10. An air conditioner control device, characterized in that, the compressor of air conditioner is multi-cylinder compressor, the device includes:
the detection module is used for detecting whether the multi-cylinder compressor can meet the current capacity requirement of the air conditioner;
the determining module is used for determining the first cylinder number of the multi-cylinder compressor meeting the current capacity requirement when the multi-cylinder compressor can meet the current capacity requirement; the first cylinder number is the number a-b of the compressor cylinders meeting the current capacity requirement, a is more than or equal to 1, b is less than or equal to n, and n is the maximum cylinder number of the compressor, namely the cylinder number of the compressor covering the current capacity requirement in the operation capacity range;
the control module is used for determining a second cylinder number corresponding to the optimal energy efficiency in the first cylinder number and controlling the multi-cylinder compressor to operate according to the second cylinder number;
the control module includes: the fourth determining unit is used for determining the operating frequency of each cylinder number in the first cylinder number, which can meet the current capacity requirement; the second judgment unit is used for judging whether the frequency with the best energy efficiency exists in the operation frequencies; according to the current capacity requirement, the frequency of the optimal energy efficiency of the multi-cylinder compressor is searched within the range of [ a, b ] according to the number of cylinders of the multi-cylinder compressor; a fifth determining unit, configured to determine, if the frequency of the optimal energy efficiency corresponds to the second number of cylinders, that is, the number of cylinders corresponding to the frequency of the optimal energy efficiency is the second number of cylinders; a sixth determining unit configured to determine, if not present, that a maximum number of cylinders among the first number of cylinders is the second number of cylinders.
11. An air conditioning assembly characterized by comprising the air conditioning control device according to claim 10.
12. A storage medium containing computer-executable instructions for performing the air conditioning control method of any one of claims 1 to 9 when executed by a computer processor.
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| JP2018048777A (en) * | 2016-09-23 | 2018-03-29 | アイシン精機株式会社 | Control method of heat pump |
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