CN115200175A - Air conditioning system and control method thereof - Google Patents
Air conditioning system and control method thereof Download PDFInfo
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- CN115200175A CN115200175A CN202110390719.0A CN202110390719A CN115200175A CN 115200175 A CN115200175 A CN 115200175A CN 202110390719 A CN202110390719 A CN 202110390719A CN 115200175 A CN115200175 A CN 115200175A
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 172
- 238000000034 method Methods 0.000 title claims abstract description 30
- 238000003491 array Methods 0.000 claims abstract description 7
- 230000003247 decreasing effect Effects 0.000 claims description 35
- 238000001704 evaporation Methods 0.000 claims description 21
- 230000008020 evaporation Effects 0.000 claims description 20
- 230000033228 biological regulation Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- 238000001816 cooling Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 4
- 230000005494 condensation Effects 0.000 description 4
- 238000012986 modification Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 238000011038 discontinuous diafiltration by volume reduction Methods 0.000 description 2
- 230000008092 positive effect Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 238000012217 deletion Methods 0.000 description 1
- 230000037430 deletion Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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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
- F24F11/72—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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention provides an air conditioning system and a control method thereof, wherein the air conditioning system comprises at least three fans and a control unit; the fans are divided into a plurality of groups, the plurality of groups comprise at least one single group and at least one complex group, the single group comprises one fan, the complex group comprises at least two fans, and the fans belonging to the complex group respond to the same control instruction; the control unit is respectively coupled with each single array and the plurality of arrays; the control unit selects and controls one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to the fans with different numbers. Through the design, the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
Description
Technical Field
The invention relates to the technical field of air conditioning systems, in particular to an air conditioning system and a control method of the air conditioning system.
Background
For an air-cooled heat pump air conditioning system (such as an air-cooled screw type water chilling unit) applying a plurality of fans, in order to ensure that the internal pressure (condensing pressure during refrigeration and evaporating pressure during heating) of a heat exchanger of the unit is in a target range under various environmental conditions, a control scheme for each fan is to control 1 fan by adopting 1 fan contactor, namely to control each fan independently. However, although the above existing solutions can achieve air volume adjustment, for the control output end, each fan contactor needs to correspond to 1 controller output port, and often the fan contactor needs to be additionally expanded due to the limited controller output ports, and the fan contactors are more in number, resulting in large consumption of the fan control part.
Disclosure of Invention
It is a primary object of the present invention to overcome at least one of the above-mentioned drawbacks of the prior art and to provide an air conditioning system that achieves air volume regulation with a simplified layout and a less costly control scheme.
In order to achieve the purpose, the invention adopts the following technical scheme:
according to an aspect of the present invention, there is provided an air conditioning system, comprising at least three fans and a control unit; the fans are divided into a plurality of groups, each group comprises at least one single array and at least one complex group, each single array comprises one fan, each complex group comprises at least two fans, and each fan belonging to one complex group responds to the same control instruction; the control unit is respectively coupled to each single array and the plurality of arrays; the control unit selects and controls one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to different numbers of fans.
According to one embodiment of the invention, the number of the fans is n, n is a positive integer, and n is more than or equal to 3; the number of the air volume grades is equal to that of the fans, and the number of the fans corresponding to each air volume grade is 1, 8230, n-1 and n respectively.
According to one embodiment of the present invention, the number of the unit arrays included in the plurality of sets is one.
According to one embodiment of the present invention, the number of the fans is even, and in the plurality of groups, the number of the fans of the group having the largest number of the fans is m 1 And m is 1 N/2 or less; or the number of the fans is odd, and the number of the fans of the group containing the most fans in the plurality of groups is m 2 And m is 2 ≤(n+1)/2。
According to one of the embodiments of the present invention, n =10; wherein the fans are divided into four groups, and the number of the fans in the four groups is 1,2,3,4; or the fans are divided into four groups, and the number of the fans in the four groups is 1,2,2,5; or the fans are divided into five groups, and the number of the fans in the five groups is 1,2 and 3 respectively.
According to one embodiment of the present invention, at least one of the fans is a variable frequency fan; and/or the control unit is coupled to each of the plurality of units and the plurality of units through a fan contactor respectively.
According to the technical scheme, the air conditioning system has the advantages and positive effects that:
according to the air conditioning system provided by the invention, the fans are divided into a plurality of groups including at least one single group and at least one complex group, and the control unit is utilized to select and control one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to fans with different numbers. Through the design, the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
Another main object of the present invention is to overcome at least one of the above-mentioned drawbacks of the prior art and to provide a control method of an air conditioning system that is capable of simplifying layout and reducing cost.
In order to realize the purpose, the invention adopts the following technical scheme:
according to another aspect of the present invention, there is provided a control method of an air conditioning system including at least three fans, comprising the steps of:
dividing the fans into a plurality of groups, wherein each group comprises at least one single group and at least one complex group, the single group comprises one fan, the complex group comprises at least two fans, and each fan belonging to one complex group responds to the same control instruction;
and selecting and controlling one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to different numbers of fans.
According to one embodiment of the invention, the number of the fans is n, n is a positive integer, and n is more than or equal to 3; in the step of controlling the air conditioning system to work at the plurality of air volume grades, the number of the air volume grades is equal to that of the fans, and the number of the fans corresponding to each air volume grade is 1, \ 8230;, n-1, n respectively.
According to one embodiment of the invention, the air volume grades are 1 grade, \8230; [ n-1] grade, n grade; wherein, still include the following step:
when the air conditioning system is controlled to increase the air volume, the air conditioning system is controlled to output gradually increasing air volume grades; and/or
And when the air conditioning system is controlled to reduce the air volume, the air conditioning system is controlled to output the air volume grade which is gradually decreased step by step.
According to one embodiment of the present invention, the step of controlling the air conditioning system to operate at the plurality of air volume levels further comprises the steps of:
the air conditioning system sets at least two increasing set values and at least two decreasing set values which are increased progressively for the condensing pressure in a refrigerating mode, wherein each increasing set value corresponds to an increasing delay period with a numerical value in an inverse correlation, and each decreasing set value corresponds to a decreasing delay period with a numerical value in a positive correlation; detecting the condensing pressure of the air conditioning system, controlling the air conditioning system to increase from the current air volume grade to the next air volume grade when the condensing pressure is greater than an increase set value and less than or equal to the next increase set value and continues for a corresponding increase delay period, and controlling the air conditioning system to decrease from the current air volume grade to the next air volume grade when the condensing pressure is less than a decrease set value and greater than or equal to the next decrease set value and continues for a corresponding decrease delay period; and/or
The air conditioning system is provided with at least two decreasing set values and at least two increasing set values which are set for the evaporation pressure in a decreasing mode, each increasing set value is respectively corresponding to an increasing delay period with a positive correlation of numerical values, and each decreasing set value is respectively corresponding to a decreasing delay period with a negative correlation of numerical values; detecting the evaporation pressure of the air conditioning system, controlling the air conditioning system to increase from the current air volume grade to the next air volume grade when the evaporation pressure is less than an increase set value and greater than or equal to the next increase set value and continues for a corresponding increase delay period, and controlling the air conditioning system to decrease from the current air volume grade to the next air volume grade when the evaporation pressure is greater than a decrease set value and less than or equal to the next decrease set value and continues for a corresponding decrease delay period.
According to the technical scheme, the control method of the air conditioning system has the advantages and positive effects that:
the control method of the air conditioning system provided by the invention divides the fans into a plurality of groups comprising at least one single array and at least one complex array, and utilizes the control unit to select and control one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to different numbers of fans. Through the design, the control method of the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
Drawings
Various objects, features and advantages of the present invention will become more apparent from the following detailed description of preferred embodiments of the invention, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the invention and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:
FIG. 1 is a schematic diagram of a fan grouping for an air conditioning system according to an exemplary embodiment;
FIG. 2 is a schematic diagram of a fan grouping for an air conditioning system according to another exemplary embodiment;
FIG. 3 is a schematic diagram of a fan grouping for an air conditioning system according to another exemplary embodiment;
fig. 4 is a graph showing an air volume control in a cooling mode according to a control method of an air conditioning system in an exemplary embodiment;
fig. 5 is a graph illustrating an air volume control in a heating mode by a control method of an air conditioning system according to an exemplary embodiment.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
Exemplary embodiments that embody features and advantages of the invention are described in detail below. It is to be understood that the invention is capable of other and different embodiments and its several details are capable of modification without departing from the scope of the invention, and that the description and drawings are accordingly to be regarded as illustrative in nature and not as restrictive.
In the following description of various exemplary embodiments of the invention, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the invention may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized and structural and functional modifications may be made without departing from the scope of the present invention. Moreover, although the terms "over," "between," "within," and the like may be used in this specification to describe various example features and elements of the invention, these terms are used herein for convenience only, e.g., in accordance with the orientation of the examples as described in the figures. Nothing in this specification should be construed as requiring a specific three dimensional orientation of structures in order to fall within the scope of this invention.
Referring to fig. 1, a fan grouping diagram of an air conditioning system according to the present invention is representatively illustrated. In the exemplary embodiment, the air conditioning system provided by the present invention is described by taking an air-cooled screw chiller as an example. Those skilled in the art will readily appreciate that various modifications, additions, substitutions, deletions, or other changes may be made to the specific embodiments described below in order to utilize the teachings of the present invention in other types of air-cooled heat pump air conditioning systems or other air conditioning systems, and still be within the scope of the principles of the air conditioning systems as taught herein.
As shown in fig. 1, the air conditioning system provided by the present invention includes ten fans and a control unit. The fans are divided into four groups, and the 1 st group is a single group, that is, only one fan is included, for example, the 1.0 fan in fig. 1. The other three groups are complex groups, namely, the three groups comprise a plurality of fans, and each fan belonging to one complex group responds to the same control instruction. Specifically, group 2 includes two fans, such as the 2.1 fan and the 2.2 fan of fig. 1, group 3 includes three fans, such as the 3.1 fan, the 3.2 fan, and the 3.3 fan of fig. 1, and group 4 includes four fans, such as the 4.1 fan, the 4.2 fan, the 4.3 fan, and the 4.4 fan of fig. 1. On this basis, the control unit is coupled respectively in each fan group, and the control unit can select and control a set of or multiunit fan work, and makes air conditioning system can work with a plurality of amount of wind grades corresponding to different quantity fans. Through the design, the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
In this embodiment, the control unit selects and controls one or more sets of fans to operate, so that the air conditioning system can operate at ten air volume levels, which are 1 level to 10 levels, specifically referring to table 1 below:
| air volume grade | Number of working fans | Working fan set | Air volume grade | Number of working fans | Working fan set |
| Level 1 | 1 | 1 | Grade 6 | 6 | 2+4 or 1+2+3 |
| Stage 2 | 2 | 2 | Stage 7 | 7 | 3+4 or 1+2+ |
| Grade 3 | 3 | 3 or 1+2 | Stage 8 | 8 | 1+3+4 |
| 4 stage | 4 | 4 or 1+3 | Grade 9 | 9 | 2+3+4 |
| Grade 5 | 5 | 1+4 or 2+3 | Grade 10 | 10 | 1+2+3+4 |
TABLE 1
In this embodiment, the number of fans operating at each air volume level is different. In other words, in some preferred embodiments according to the design concept of the present invention, the number of the air volume grades that can be output by the air conditioning system may be equal to the number of the fans, that is, when the number of the fans is n (n is a positive integer, and n ≧ 3), the number of the air volume grades is n, and the number of the fans corresponding to each air volume grade is 1, \8230;, n-1, n, respectively.
It should be understood that in other embodiments, the number of air volume levels that can be output by the air conditioning system may be less than the number of fans based on other groupings of fans. Taking an example that the air conditioning system includes ten fans (i.e., n = 10), the fans may be divided into three groups, and when the 1 st group includes one fan, the 2 nd group includes three fans, and the 3 rd group includes six fans, the number of air volume levels that the air conditioning system can output is seven, which are respectively 1 level to 7 levels, specifically referring to the following table 2:
| air volume grade | Number of working fans | Working fan set | Air volume grade | Number of working fans | Working fan set |
| Level 1 | 1 | 1 | Grade 5 | 7 | 1+3 |
| Stage 2 | 3 | 2 | Grade 6 | 9 | 2+3 |
| Grade 3 | 4 | 1+2 | Stage 7 | 10 | 1+2+3 |
| 4 stage | 6 | 3 |
TABLE 2
In summary, in various possible embodiments consistent with the design concept of the present invention, the air conditioning system may include at least three fans, the fans may be divided into multiple groups (only two groups when three fans are included), and the fan groups include at least one single group and at least one plural group, the single group includes one fan, and the plural group includes at least two fans. When the plurality of sets are plural, the number of the fans included in each of the plurality of sets may be equal, not completely equal, or not equal. Each fan belonging to a plurality of groups responds to the same control instruction. On the basis, the control unit is respectively coupled to each single array and the plurality of arrays. Accordingly, the control unit selects and controls one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume levels corresponding to fans of different numbers.
Alternatively, as shown in fig. 1, on the basis of the design that the number of the air volume levels that can be output by the air conditioning system is equal to the number of the fans, in this embodiment, the number of the single arrays may be one. In other words, for all the fans, only one of the fans is a group, and the rest of the fans are respectively included in each of the plurality of groups. Therefore, when the air conditioning system realizes accurate gradual regulation and control by taking the number of the fans as the number of the air volume grades, the control layout of the control unit corresponding to the fans can be further simplified by limiting the fans to only contain one single array when the fans are grouped, and the consumption of the control scheme is further reduced.
In this regard, taking an air conditioning system including ten fans as an example, the grouping manner of the fans adopted in this embodiment reduces the number of the fan groups to a minimum, that is, four groups, while realizing accurate step-by-step regulation and control of the air conditioning system using the number of the fans as the number of air volume levels. It should be understood that when the air conditioning system includes four and more fans, the grouping of the fans need not be limited to one way to achieve the above design objectives.
For example, referring to fig. 2, a fan grouping diagram of an air conditioning system in another embodiment of the present invention is representatively illustrated. In this embodiment, an example in which the air conditioning system includes ten fans is still described. Wherein, these fans are divided into four groups, the 1 st group is a single array, such as the 1.0 fan in fig. 2. The other three groups are plural groups. Specifically, group 2 includes two fans, such as the 2.1 fan and the 2.2 fan in fig. 2, group 3 includes two fans, such as the 3.1 fan and the 3.2 fan in fig. 2, and group 4 includes five fans, such as the 4.1 fan, the 4.2 fan, the 4.3 fan, the 4.4 fan, and the 4.5 fan in fig. 2. In this embodiment, the control unit selects and controls one or more sets of fans to operate, and the air conditioning system can still operate at ten air volume levels, which are 1 level to 10 levels, specifically referring to the following table 3:
| air volume grade | Number of working fans | Working fan set | Air volume grade | Number of working fans | Working fan set |
| Level 1 | 1 | 1 | Grade 6 | 6 | 1+4 |
| Stage 2 | 2 | 2 or 3 | Stage 7 | 7 | 2+4 or 3+4 |
| Grade 3 | 3 | 1+2 or 1+3 | Stage 8 | 8 | 1+2+4 or 1+3+4 |
| 4 stage | 4 | 2+3 | Grade 9 | 9 | 2+3+4 |
| Grade 5 | 5 | 1+2+3 or 4 | Grade 10 | 10 | 1+2+3+4 |
TABLE 3
For another example, referring to fig. 3, a fan grouping diagram of an air conditioning system in another embodiment of the present invention is representatively illustrated. In this embodiment, an example in which the air conditioning system includes ten fans is still described. Wherein, these fans are divided into five groups, and the 1 st group is a single array, such as the 1.0 fan in fig. 3. The other four groups are a plurality of groups. Specifically, group 2 includes two fans, such as the 2.1 fan and the 2.2 fan in fig. 3, group 3 includes three fans, such as the 3.1 fan, the 3.2 fan, and the 3.3 fan in fig. 3, group 4 includes two fans, such as the 4.1 fan and the 4.2 fan in fig. 3, and group 5 includes two fans, such as the 5.1 fan and the 5.2 fan in fig. 3. In this embodiment, the control unit selects and controls one or more sets of fans to operate, and the air conditioning system can still operate at ten air volume levels, which are 1-10 levels, specifically referring to the following table 4:
| air volume grade | Number of working fans | Working fan set |
| Level 1 | 1 | 1 |
| Stage 2 | 2 | 2 or 4 or 5 |
| Grade 3 | 3 | 1+2 or 1+4 or 1+5 |
| 4 stage | 4 | 1+3, 2+4, 2+5 or 4+5 |
| Grade 5 | 5 | 1,2, 4, 1,2, 5, 1, 4, 5, 3,4, 3, 5 |
| Grade 6 | 6 | 1,2,3, 1, 3,4, 1, 3, 5, 4, 5 |
| Stage 7 | 7 | 1+2+4, 2+3+5, 3+4+5 |
| Stage 8 | 8 | 1,2,3, 5, 1, 3,4, 5 |
| Grade 9 | 9 | 2+3+4+5 |
| Grade 10 | 10 | 1+2+3+4+5 |
TABLE 4
Alternatively, as shown in fig. 1 to fig. 3, in various possible embodiments according to the design concept of the present invention, when the air conditioning system is to perform gradual control using the number of fans as the number of air volume levels, the fans may be grouped in a plurality of different ways, but the number of some fan groups is limited. The method comprises the following specific steps:
when the number of the fans included in the air conditioning system is even, the number of the fans of the group including the largest fans in the plurality of groups of fans is m 1 And m is 1 N is less than or equal to n/2, n is more than or equal to 4, namely the number of the fans of the group containing the most fans is not more than half of the total number of the fans.
When the number of the fans included in the air conditioning system is odd, the number of the fans of the group including the largest number of the fans in the plurality of groups of fans is m 2 And m is 2 Not more than (n + 1), n not less than 3, i.e. the number of the fans of the group containing the most fansThe amount is not more than half of the total number of fans plus one.
Optionally, in this embodiment, the fan may be a variable frequency fan. On the basis, the control unit can specifically control the selected fan set to synchronously perform frequency modulation control on the fans of the fan set, so that the air conditioning system can further realize an accurate frequency modulation control function under each air volume grade. In other embodiments, the fan may also be a fixed-frequency fan, or one part of the fan may be a variable-frequency fan and the other part is a fixed-frequency fan, which are not limited to this embodiment.
Optionally, in this embodiment, the control unit may be coupled to each of the single array and the plurality of arrays through the blower contactor, respectively.
It should be noted herein that the air conditioning systems shown in the drawings and described in this specification are only a few examples of the wide variety of air conditioning systems that can employ the principles of the present invention. It should be clearly understood that the principles of this disclosure are in no way limited to any of the details of the air conditioning system or any of the components of the air conditioning system shown in the drawings or described in this specification.
For example, the air conditioning system proposed by the present invention is not limited to the fan units in the double-row layout shown in fig. 1 to fig. 3, but may also be applied to other types of units such as a V-fin heat exchanger unit, a single-row or multi-row fan unit, an inverted M-fin heat exchanger, etc., and the specific arrangement and layout of the fans do not affect the application of the air conditioning system proposed by the present invention in various possible embodiments.
In summary, the air conditioning system provided by the present invention divides the fans into a plurality of groups including at least one single group and at least one plural group, and uses the control unit to select and control one or more groups of fans to operate, so that the air conditioning system can operate at a plurality of air volume levels corresponding to different numbers of fans. Through the design, the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
Based on the above detailed description of several exemplary embodiments of the air conditioning system proposed by the present invention, an exemplary embodiment of a control method of the air conditioning system proposed by the present invention will be described below with reference to fig. 4 and 5.
In this embodiment, the control method of an air conditioning system provided by the present invention is used for controlling an air conditioning system including at least three fans, and the control method at least includes the following steps:
the method comprises the following steps of dividing fans into a plurality of groups, wherein the plurality of groups comprise at least one single-number group and at least one complex-number group, the single-number group comprises one fan, the complex-number group comprises at least two fans, and the fans belonging to the complex-number group respond to the same control instruction;
one or more groups of fans are selected and controlled to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to different numbers of fans.
Through the design, the control method of the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
Optionally, in this embodiment, the number of the fans is n, n is a positive integer, and n ≧ 3. On the basis, in the step of controlling the air conditioning system to work at a plurality of air volume grades, the number of the air volume grades can be equal to the number of the fans, and the number of the fans corresponding to each air volume grade is 1, \ 8230;, n-1, n respectively. Therefore, the control method can realize accurate step-by-step regulation and control of the air conditioning system by taking the number of the fans as the number of air volume grades.
Further, based on the design that the number of the air volume grades is equal to the number of the fans, in this embodiment, the air volume grades are defined as 1 grade, \8230 [ [ n-1] grade, and n grade, respectively, then the control method may further include the following steps:
when the air conditioning system is controlled to increase the air volume, the air conditioning system is controlled to output gradually increasing air volume grades. Specifically, the current output air volume level of the air conditioning system is defined as x level (x < n), and when the output air volume level of the air conditioning system needs to be increased, the air conditioning system is controlled to be adjusted in an increasing manner in the order of x level → 8230 \8230 [ \ 8230 [ [ n-1] level → n level. The above-described sequence is merely an example, and does not limit the adjustment to be increased to the highest air volume level (n levels) every time the adjustment is increased, that is, the adjustment may be increased by only the number of levels 1 to [ n-x-1], but may be increased in stages in accordance with the above-described sequence.
And when the air conditioning system is controlled to reduce the air volume, the air conditioning system is controlled to output the air volume grade which is gradually decreased step by step. Specifically, the current output air volume level of the air conditioning system is defined as x level (x is more than or equal to 2), and when the output air volume level of the air conditioning system needs to be reduced, the air conditioning system is controlled to be adjusted in an increasing manner in the order of x level → 8230 \ 8230; 2 level → 1 level. The above sequence is merely an example, and it is not limited that the air volume level must be increased to the highest air volume level (n levels) each time the adjustment is increased, that is, only the number of levels 1 to [ n-x-1] may be increased, but the air volume level may be increased in steps in accordance with the above sequence.
Optionally, as shown in fig. 4, in this embodiment, the step of controlling the air conditioning system to operate at multiple air volume levels may further include the following steps:
the air conditioning system sets at least two increasing set values which are increased progressively and at least two decreasing set values (namely the unit of the set values is a pressure unit) which are decreased progressively for the condensing pressure under a refrigerating mode, each increasing set value corresponds to an increasing delay period (namely the unit of the increasing delay period is a time unit) with a numerical value in a reverse correlation respectively, and each decreasing set value corresponds to a decreasing delay period (namely the unit of the decreasing delay period is a time unit) with a numerical value in a positive correlation respectively;
and detecting the condensation pressure of the air conditioning system, controlling the air conditioning system to increase from the current air volume grade to the next air volume grade when the condensation pressure is greater than an increase set value and less than or equal to the next increase set value and continues for the corresponding increase delay period, and controlling the air conditioning system to decrease from the current air volume grade to the next air volume grade when the condensation pressure is less than a decrease set value and greater than or equal to the next decrease set value and continues for the corresponding decrease delay period.
Specifically, in the present embodiment, for the condensing pressure, three decreasing set values and three increasing set values may be set in increments, the three decreasing set valuesOther than Pd 1 、Pd 2 And Pd 3 The three increasing set values are respectively Pd 4 、Pd 5 And Pd 6 The meaning of the above-mentioned "increment" is specifically: pd 1 ＜Pd 2 ＜Pd 3 ＜Pd 4 ＜Pd 5 ＜Pd 6 . On the basis of the above three reduction set values Pd 1 、Pd 2 、Pd 3 Corresponding to three reduced delay periods T respectively 1 、T 2 、T 3 The meaning of the above-mentioned "positive correlation" is specifically: t is a unit of 1 ＜T 2 ＜T 3 . The three increase set values Pd 4 、Pd 5 、Pd 6 Corresponding to three increased delay periods T respectively 4 、T 5 、T 6 The meaning of the above-mentioned "anti-correlation" is specifically: t is a unit of 4 ＞T 5 ＞T 6 . In other embodiments, the decreasing setting value set for the condensing pressure may be two or more than three, and the increasing setting value may be two or more than three, all of which are not limited in this embodiment.
As shown in fig. 4, in the present embodiment, the set value Pd is decreased in the cooling mode 3 And increasing the set value Pd 4 The included interval is the target condensing pressure interval, i.e. Pd 3 ≤Pd 0 ≤Pd 4 (Pd 0 Measured value of condensing pressure), which is also an air volume maintaining interval. Decrease the set value Pd 1 、Pd 2 And Pd 3 The included interval is the air volume reduction interval, namely Pd is more than or equal to 0 0 ＜Pd 3 The interval of (2). Increase the set value Pd 4 、Pd 5 And Pd 6 The section included is an air volume increase section, namely Pd 0 ＞Pd 4 The interval of (2). On the basis, the measured value of the condensing pressure is smaller than the reduction set value Pd through the design of the reduction delay period and the increase delay period 3 The more, the faster the reduction of the air volume level is, and the measured value of the condensation pressure is made larger than the increase set value Pd 4 The more, the faster the increase in the air volume level. In other words, the more the currently measured condensing pressure of the air conditioning system deviates from the air volume maintaining intervalAnd the shorter the time delay regulation and control period is, the faster the air volume regulation rate is. See table 5 below for details:
TABLE 5
Further, based on the above design of the preferred control scheme in the cooling mode of the air conditioning system, in the present embodiment, the delay period T is reduced 3 May be equal to increasing the delay period T 4 。
Further, based on the above design of the preferred control scheme in the cooling mode of the air conditioning system, in the present embodiment, the delay period T is reduced 2 May be equal to increasing the delay period T 5 。
Further, based on the above design of the preferred control scheme in the cooling mode of the air conditioning system, in the present embodiment, the delay period T is reduced 1 May be equal to increasing the delay period T 6 。
In view of the above, taking an air-conditioning system as an air-cooled screw water chiller unit including ten fans as an example, based on the above design of the preferred control scheme in the cooling mode of the air-conditioning system, in this embodiment, pd is used as the reference 1 ＝7.0bar，Pd 2 ＝7.5bar，Pd 3 ＝8.0bar，Pd 4 ＝10.0bar，Pd 5 ＝10.5bar，Pd 6 =11.0bar, and, T 1 ＝10s，T 2 ＝20s，T 3 ＝30s，T 4 ＝30s，T 5 ＝20s，T 6 ＝10s。
On the basis, the current air volume grade of the air-conditioning system is assumed to be 6 grades, and Pd is more than or equal to 8.0bar 0 And when the pressure is less than or equal to 10.0bar, the measured value of the condensing pressure is in the air volume maintaining interval, the air conditioning system is controlled to maintain the current state, and the air volume grade is not increased or decreased.
Assuming that the current air volume grade of the air conditioning system is 6 grades, when Pd 0 And when the pressure is more than 10.5bar and the duration time reaches 20s, controlling the air volume level of the air conditioning system to be increased to 7 levels.
Assuming the current air volume of the air conditioning systemGrade 6 when Pd 0 And when the pressure is less than 8.0bar and the duration time reaches 30s, controlling the air volume level of the air conditioning system to be reduced to 5 levels.
Supposing that the current air volume grade of the air conditioning system is 6 grades, when Pd 0 And when the pressure is less than 7.0bar and the duration reaches 10s, controlling the air volume level of the air conditioning system to be reduced to 5 levels.
Optionally, as shown in fig. 5, in this embodiment, the step of controlling the air conditioning system to operate at multiple air volume levels may further include the following steps:
in the heating mode of the air conditioning system, at least two increasing set values and at least two decreasing set values are set for the evaporation pressure, wherein the unit of the set values is a pressure unit, each increasing set value corresponds to an increasing delay period (namely the unit of the increasing delay period is a time unit) with a positive correlation of numerical values, and each decreasing set value corresponds to a decreasing delay period (namely the unit of the decreasing delay period is a time unit) with a negative correlation of the numerical values;
detecting the evaporation pressure of the air-conditioning system, controlling the air-conditioning system to increase from the current air volume grade to the next air volume grade when the evaporation pressure is less than an increase set value and is greater than or equal to the next increase set value and continues for a corresponding increase delay period, and controlling the air-conditioning system to decrease from the current air volume grade to the next air volume grade when the evaporation pressure is greater than a decrease set value and is less than or equal to the next decrease set value and continues for a corresponding decrease delay period.
Specifically, in the present embodiment, three increasing set values and three decreasing set values that are increased in increments, ps, may be set for the evaporation pressure 1 、Ps 2 And Ps 3 The three reduction setting values are respectively Ps 4 、Ps 5 And Ps 6 The meaning of the above-mentioned "increasing" is specifically: ps 1 ＜Ps 2 ＜Ps 3 ＜Ps 4 ＜Ps 5 ＜Ps 6 . On the basis, the three increase set values Ps 1 、Ps 2 、Ps 3 Corresponding to three increased delay periods T respectively 1 ’、T 2 ’、T 3 ', the meaning of the above-mentioned "positive correlation" is specifically: t is a unit of 1 ’＜T 2 ’＜T 3 '. The three reduction set values Ps mentioned above 4 、Ps 5 、Ps 6 Corresponding to three reduced delay periods T respectively 4 ’、T 5 ’、T 6 ', the meaning of the above-mentioned "anti-correlation" is specifically: t is 4 ’＞T 5 ’＞T 6 '. In other embodiments, the set increasing value for the evaporation pressure may be two or more than three, and the set decreasing value may be two or more than three, all of which are not limited in this embodiment.
As shown in fig. 5, in the present embodiment, the set value Ps is increased in the heating mode 3 And decreasing the set value Ps 4 The included interval is a target evaporation pressure interval, i.e., ps 3 ≤Ps 0 ≤Ps 4 (Ps 0 A measured value of the evaporation pressure), which is also an air volume maintaining interval. Increase the set value Ps 1 、Ps 2 And Ps 3 The included interval is an air volume increase interval, namely, ps is more than or equal to 0 0 ＜Ps 3 The interval of (c). Decrease the set value Ps 4 、Ps 5 And Ps 6 The included section is an air volume reduction section, namely Ps 0 ＞Ps 4 The interval of (c). On the basis, the measured value of the evaporation pressure is smaller than the increase set value Ps through the design of the increase delay period and the decrease delay period 3 The more, the faster the increase of the air volume level and the greater the measured value of the evaporation pressure than the reduction set value Ps 4 The more, the faster the reduction of the air volume level. In other words, the farther the currently measured evaporation pressure of the air conditioning system deviates from the air volume retention interval, the shorter the period of the delay regulation and control, and the faster the rate of the air volume regulation. See table 5 below for details:
TABLE 5
Further, based on the air conditionerDesign of the preferred control scheme in the heating mode of the system, in this embodiment, the delay period T is increased 3 ' may equal a reduced delay period T 4 ’。
Further, based on the above design of the preferred control scheme in the heating mode of the air conditioning system, in the present embodiment, the delay period T is increased 2 ' may equal a reduced delay period T 5 ’。
Further, based on the above design of the preferred control scheme in the heating mode of the air conditioning system, in the present embodiment, the delay period T is increased 1 ' may equal a reduced delay period T 6 ’。
In view of the above, taking an air-conditioning system as an air-cooled screw water chiller including ten fans as an example, based on the above design of the preferred control scheme in the heating mode of the air-conditioning system, in this embodiment, ps 1 ＝7.0bar，Ps 2 ＝7.5bar，Ps 3 ＝8.0bar，Ps 4 ＝10.0bar，Ps 5 ＝10.5bar，Ps 6 =11.0bar, and, T 1 ’＝10s，T 2 ’＝20s，T 3 ’＝30s，T 4 ’＝30s，T 5 ’＝20s，T 6 ’＝10s。
On the basis, the current air volume grade of the air conditioning system is assumed to be 6 grades, and when the current air volume grade is less than or equal to 8.0bar and less than or equal to Ps 0 And when the pressure is less than or equal to 10.0bar, the measured value of the evaporation pressure is in the air volume maintaining interval, the air conditioning system is controlled to maintain the current state, and the air volume grade is not increased or decreased.
Assuming that the current air volume grade of the air conditioning system is 6 grades, when Ps 0 And when the pressure is more than 10.5bar and the duration time reaches 20s, controlling the air volume level of the air conditioning system to be increased to 7 levels.
Supposing that the current air volume grade of the air conditioning system is 6 grades, when Ps 0 And when the pressure is less than 8.0bar and the duration time reaches 30s, controlling the air volume level of the air conditioning system to be reduced to 5 levels.
Supposing that the current air volume grade of the air conditioning system is 6 grades, when Ps 0 And when the pressure is less than 7.0bar and the duration time reaches 10s, controlling the air volume level of the air conditioning system to be reduced to 5 levels.
It should be noted herein that the control methods of the air conditioning system shown in the drawings and described in the present specification are only a few examples of the many kinds of control methods that can employ the principles of the present invention. It should be clearly understood that the principles of the present invention are in no way limited to any of the details or any of the steps of the control method of the air conditioning system shown in the drawings or described in this specification.
In summary, the control method of the air conditioning system provided by the present invention divides the fans into a plurality of groups including at least one single array and at least one plural array, and uses the control unit to select and control one or more groups of fans to operate, so that the air conditioning system can operate at a plurality of air volume levels corresponding to different numbers of fans. Through the design, the control method of the air conditioning system provided by the invention can meet various air output requirements in a mode of combining the fan sets, greatly simplifies the control layout of the control unit corresponding to the fan, and obviously reduces the consumption of a control scheme.
Exemplary embodiments of an air conditioning system and a control method of an air conditioning system according to the present invention are described and/or illustrated in detail above. Embodiments of the invention are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.
While the air conditioning system and the control method of the air conditioning system of the present invention have been described in terms of various specific embodiments, those skilled in the art will recognize that the invention can be practiced with modification within the spirit and scope of the claims.
Claims (10)
1. An air conditioning system, comprising:
the system comprises at least three fans and a control unit, wherein the fans are divided into a plurality of groups, the plurality of groups comprise at least one single group and at least one complex group, the single group comprises one fan, the complex group comprises at least two fans, and each fan belonging to one complex group responds to the same control command;
a control unit coupled to each of the plurality of units and the plurality of sets, respectively;
the control unit selects and controls one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to different numbers of fans.
2. The air conditioning system as claimed in claim 1, wherein the number of the fans is n, n is a positive integer, and n is greater than or equal to 3; the number of the air volume grades is equal to that of the fans, and the number of the fans corresponding to each air volume grade is 1, 8230, n-1, n.
3. The air conditioning system as claimed in claim 2, wherein the number of the unit arrays included in the plurality of sets is one.
4. The air conditioning system of claim 2, wherein the number of the fans is even, and the number of the fans of the group including the largest number of the fans among the plurality of groups is m 1 And m is 1 N/2 or less; or the number of the fans is odd, and in the multiple groups, the number of the fans of the group containing the most fans is m 2 And m is 2 ≤(n+1)/2。
5. Air conditioning system according to claim 3 or 4, characterized in that n =10; wherein the fans are divided into four groups, and the number of the fans in the four groups is 1,2,3,4; or the fans are divided into four groups, and the number of the fans in the four groups is 1,2,2,5; or the fans are divided into five groups, and the number of the fans in the five groups is 1,2 and 3 respectively.
6. The air conditioning system of claim 1, wherein at least one of the fans is an inverter fan; and/or the control unit is coupled to each of the plurality of units and the plurality of units through a fan contactor respectively.
7. A control method of an air conditioning system, wherein the air conditioning system comprises at least three fans, is characterized by comprising the following steps:
dividing the fans into a plurality of groups, wherein the plurality of groups comprise at least one single array and at least one complex array, the single array comprises one fan, the complex array comprises at least two fans, and each fan belonging to one complex array responds to the same control instruction;
and selecting and controlling one or more groups of fans to work, so that the air conditioning system can work at a plurality of air volume grades corresponding to different numbers of fans.
8. The control method of the air conditioning system according to claim 1, wherein the number of the fans is n, n is a positive integer, and n is greater than or equal to 3; in the step of controlling the air conditioning system to work at the plurality of air volume grades, the number of the air volume grades is equal to that of the fans, and the number of the fans corresponding to each air volume grade is 1, \ 8230;, n-1, n respectively.
9. The control method of an air conditioning system according to claim 8, wherein the air volume ratings are class 1, \8230; [ n-1], class n; wherein, still include the following step:
when the air conditioning system is controlled to increase the air volume, the air conditioning system is controlled to output gradually increasing air volume grades; and/or
And when the air conditioning system is controlled to reduce the air volume, the air conditioning system is controlled to output the gradually decreased air volume grade.
10. The method of claim 8, wherein the step of controlling the air conditioning system to operate at the plurality of air volume levels further comprises the steps of:
the air conditioning system sets at least two increasing set values and at least two decreasing set values which are increased progressively for the condensing pressure in a refrigerating mode, wherein each increasing set value corresponds to an increasing delay period with a numerical value in an inverse correlation, and each decreasing set value corresponds to a decreasing delay period with a numerical value in a positive correlation; detecting the condensing pressure of the air conditioning system, controlling the air conditioning system to increase from the current air volume grade to the next air volume grade when the condensing pressure is greater than an increase set value and less than or equal to the next increase set value and lasts for a corresponding increase delay period, and controlling the air conditioning system to decrease from the current air volume grade to the next air volume grade when the condensing pressure is less than a decrease set value and greater than or equal to the next decrease set value and lasts for a corresponding decrease delay period; and/or
The air conditioning system is provided with at least two decreasing set values and at least two increasing set values which are set for the evaporation pressure in a decreasing mode, each increasing set value is respectively corresponding to an increasing delay period with a positive correlation of numerical values, and each decreasing set value is respectively corresponding to a decreasing delay period with a negative correlation of numerical values; detecting the evaporation pressure of the air conditioning system, controlling the air conditioning system to increase from the current air volume grade to the next air volume grade when the evaporation pressure is less than an increase set value and is greater than or equal to the next increase set value and continues for a corresponding increase delay period, and controlling the air conditioning system to decrease from the current air volume grade to the next air volume grade when the evaporation pressure is greater than a decrease set value and is less than or equal to the next decrease set value and continues for a corresponding decrease delay period.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN202792404U (en) * | 2012-09-06 | 2013-03-13 | 广东美的电器股份有限公司 | Air conditioner and outdoor unit thereof |
| CN110332620A (en) * | 2019-05-28 | 2019-10-15 | 广东申菱环境系统股份有限公司 | A kind of control method of air cooled heat pump condensation fan |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN202792404U (en) * | 2012-09-06 | 2013-03-13 | 广东美的电器股份有限公司 | Air conditioner and outdoor unit thereof |
| CN110332620A (en) * | 2019-05-28 | 2019-10-15 | 广东申菱环境系统股份有限公司 | A kind of control method of air cooled heat pump condensation fan |
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