CN107270518B - Air conditioning system, and control device and method of air conditioning system - Google Patents
Air conditioning system, and control device and method of air conditioning system Download PDFInfo
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- CN107270518B CN107270518B CN201710620472.0A CN201710620472A CN107270518B CN 107270518 B CN107270518 B CN 107270518B CN 201710620472 A CN201710620472 A CN 201710620472A CN 107270518 B CN107270518 B CN 107270518B
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/30—Arrangement or mounting of heat-exchangers
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Abstract
The invention discloses an air conditioning system, a control device and a control method of the air conditioning system, wherein a first port of an outdoor heat exchanger is connected with a compressor through a first pipeline, a second port of the outdoor heat exchanger is connected with an indoor heat exchanger through a second pipeline, and the device comprises: n branches connected in parallel with the first pipeline, wherein N is an integer greater than 1; the N valve components are correspondingly arranged on the N branches, and each valve component is used for controlling the opening or closing of the corresponding branch; the flow detection unit is used for detecting the refrigerant flow of the air conditioning system; and the control unit is respectively connected with the N valve assemblies and the flow detection unit and is used for controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system. Therefore, the flow of the refrigerant of the air conditioning system can be controlled by controlling the opening or closing of the valve component, so that the refrigerant entering the indoor heat exchanger is ensured not to be overheated, and the refrigerating performance of the air conditioner is improved.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a control device for an air conditioning system, a control method for an air conditioning system, and a non-transitory computer-readable storage medium.
Background
In the related technology, the evaporator and the condenser of the frequency conversion energy-efficient air conditioning system are both larger in volume, and the refrigerant filling amount of the system is 30% higher than that of a common air conditioning system. However, the related art has problems that the high Energy Efficiency system generally adopts a compressor with a small displacement, the refrigerant amount exceeds the maximum charge amount of the compressor, and there is a great safety hazard to the liquid return, oil return and reliability of the compressor, and when the compressor operates in a low frequency state, the flow rate of the system is small, the refrigerant is basically accumulated in the condenser, so that the refrigerant in the evaporator is relatively little, the return air temperature of the compressor fluctuates and the temperature is relatively high, the refrigeration amount of the system decreases, and the EER (Energy Efficiency Ratio, the refrigeration performance coefficient of the air conditioner) significantly decreases.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art. Therefore, a first object of the present invention is to provide a control device for an air conditioning system, which can ensure that the refrigerant entering the evaporator does not overheat, and the return air temperature of the compressor does not fluctuate or become higher.
A second object of the present invention is to provide an air conditioning system.
A third object of the present invention is to provide a control method of an air conditioning system.
A fourth object of the invention is to propose a non-transitory computer-readable storage medium.
In order to achieve the above object, a first aspect of the present invention provides a control device for an air conditioning system, the air conditioning system including a compressor, an outdoor heat exchanger and an indoor heat exchanger, a first port of the outdoor heat exchanger being connected to the compressor through a first pipeline, a second port of the outdoor heat exchanger being connected to the indoor heat exchanger through a second pipeline, the device including: the N branches are connected in parallel or connected in series with the first pipeline, wherein N is an integer greater than 1; the N valve components are correspondingly arranged on the N branches, and each valve component is used for controlling the opening or closing of the corresponding branch; the flow detection unit is used for detecting the refrigerant flow of the air conditioning system; and the control unit is respectively connected with the N valve assemblies and the flow detection unit and is used for controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system.
According to the control device of the air conditioning system provided by the embodiment of the invention, the first pipeline connected with the compressor at the first port of the outdoor heat exchanger is connected with the N branches in parallel, the N branches are correspondingly provided with the N valve assemblies, each valve assembly is used for controlling the opening or closing of the corresponding branch, and the control unit detects the refrigerant flow of the air conditioning system through the flow monitoring unit and controls the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system. Therefore, the device provided by the embodiment of the invention can control the flow of the refrigerant of the air conditioning system by controlling the opening or closing of the valve component, so that the refrigerant entering the indoor heat exchanger is prevented from overheating, and the return air temperature of the compressor is prevented from fluctuating and having a high temperature, thereby improving the refrigeration performance of the air conditioner, improving the reliability of the compressor and improving the user experience.
According to an embodiment of the present invention, the control device of the air conditioning system configures a plurality of flow intervals, and the plurality of flow intervals correspond to a plurality of opening numbers, respectively, wherein the control unit is further configured to acquire a flow interval to which a refrigerant flow of the air conditioning system belongs, and control the N valve assemblies according to the opening number corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs.
According to an embodiment of the present invention, when the air conditioning system performs cooling, the control unit is further configured to: when the refrigerant flow of the air conditioning system is smaller than a first flow, controlling any one of the N valve assemblies to be opened; when the refrigerant flow of the air conditioning system is greater than or equal to the first flow and less than or equal to the second flow, controlling any M of the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N; and when the refrigerant flow of the air conditioning system is greater than the second flow, controlling the N valve assemblies to be opened.
According to an embodiment of the present invention, the N branches may be disposed at a first port of the outdoor heat exchanger, and the flow rate detecting unit is disposed at a second port of the outdoor heat exchanger, so as to obtain a refrigerant flow rate of the air conditioning system by detecting the refrigerant flow rate at the second port of the outdoor heat exchanger.
According to an embodiment of the present invention, the control unit may be further configured to obtain an operating frequency of the air conditioning system, and control the N valve assemblies according to a refrigerant flow of the air conditioning system when the operating frequency of the air conditioning system is less than a preset frequency.
In order to achieve the above object, a second aspect of the present invention provides an air conditioning system, including the control device of the air conditioning system.
According to the air conditioning system provided by the embodiment of the invention, the control device of the air conditioning system ensures that the refrigerant entering the indoor heat exchanger cannot be overheated and the return air temperature of the compressor cannot be fluctuated and has a higher temperature, so that the refrigeration performance of the air conditioner is improved, the reliability of the compressor is improved and the user experience is improved.
In order to achieve the above object, a third embodiment of the present invention provides a method for controlling an air conditioning system, where the air conditioning system includes a compressor, an outdoor heat exchanger, an indoor heat exchanger, N branches, and N valve assemblies, a first port of the outdoor heat exchanger is connected to the compressor through a first pipeline, a second port of the outdoor heat exchanger is connected to the indoor heat exchanger through a second pipeline, the N branches are connected in parallel, the N branches connected in parallel are connected in parallel or in series with the first pipeline, the N valve assemblies are correspondingly disposed on the N branches, each valve assembly is configured to control opening or closing of a corresponding branch, N is an integer greater than 1, and the method includes the following steps: detecting the refrigerant flow of the air conditioning system; and controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system.
According to the control method of the air conditioning system provided by the embodiment of the invention, the opening or closing of the N valve assemblies is controlled by detecting the refrigerant flow of the air conditioning system and then controlling the refrigerant flow of the air conditioning system. Therefore, the method provided by the embodiment of the invention can control the flow of the refrigerant of the air conditioning system by controlling the opening or closing of the valve component, so that the refrigerant entering the indoor heat exchanger is prevented from overheating, and the return air temperature of the compressor is prevented from fluctuating and having a high temperature, thereby improving the refrigeration performance of the air conditioner, improving the reliability of the compressor and improving the user experience.
According to an embodiment of the present invention, a plurality of flow intervals are configured, the plurality of flow intervals respectively correspond to a plurality of opening numbers, the opening or closing of the N valve assemblies is controlled according to a refrigerant flow of the air conditioning system, and the control method of the air conditioning system may include: acquiring a flow interval to which the refrigerant flow of the air conditioning system belongs; and controlling the N valve assemblies according to the opening number corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs.
According to an embodiment of the present invention, when the air conditioning system performs cooling, the method for controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system may include: when the refrigerant flow of the air conditioning system is smaller than a first flow, controlling any one path of the N valve components to be opened; when the refrigerant flow of the air conditioning system is greater than or equal to the first flow and less than or equal to the second flow, controlling any M paths of the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N; and when the refrigerant flow of the air conditioning system is greater than the second flow, controlling the N valve assemblies to be opened.
According to an embodiment of the present invention, the control method of the air conditioning system may obtain the refrigerant flow rate of the air conditioning system by detecting the refrigerant flow rate of the second port of the outdoor heat exchanger.
According to an embodiment of the present invention, the control method of the air conditioning system may further include: acquiring the operating frequency of the air conditioning system; and when the operating frequency of the air conditioning system is less than the preset frequency, controlling the N valve assemblies according to the refrigerant flow of the air conditioning system.
To achieve the above object, a fourth aspect of the present invention provides a non-transitory computer-readable storage medium having a computer program stored thereon, the computer program implementing the control method of the air conditioning system when executed by a processor.
According to the non-transitory computer readable medium provided by the embodiment of the invention, by executing the control method of the air conditioning system, the refrigerant entering the indoor heat exchanger is ensured not to be overheated, and the return air temperature of the compressor is ensured not to be fluctuated and the temperature is higher, so that the refrigeration performance of the air conditioner is improved, the reliability of the compressor is improved, and the user experience is improved.
Drawings
Fig. 1 is a block schematic diagram of a control device of an air conditioning system according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of an air conditioning system according to one embodiment of the present invention;
FIG. 3 is a block schematic diagram of an air conditioning system according to an embodiment of the present invention;
fig. 4 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention;
fig. 5 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention; and
fig. 6 is a flowchart of a control method of an air conditioning system according to another embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
A control device of an air conditioning system, and a control method of an air conditioning system according to embodiments of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a block schematic diagram of a control apparatus of an air conditioning system according to an embodiment of the present invention. Wherein, according to the embodiment of fig. 2, the air conditioning system may include a compressor 1, an outdoor heat exchanger 2, and an indoor heat exchanger 3, a first port of the outdoor heat exchanger 2 is connected to the compressor 1 through a first pipe 6, and a second port of the outdoor heat exchanger 2 is connected to the indoor heat exchanger 3 through a second pipe 7. Further, as shown in fig. 2, the second port of the outdoor heat exchanger 2 is connected to the second port of the indoor heat exchanger 3 through a second pipe 7, and the first port of the indoor heat exchanger 3 is connected to the compressor 1 through a third pipe 8.
Specifically, as shown in fig. 2, the air conditioning system may further include a throttling device 4 and a four-way valve 5, wherein a first end C of the four-way valve 5 is connected to a first port of the outdoor heat exchanger 2, a second end S of the four-way valve 5 is connected to a gas outlet of the compressor 1, that is, the first port of the outdoor heat exchanger 2 may be connected to the gas outlet of the compressor 1 through the four-way valve 5, a third end E of the four-way valve 5 is connected to a first port of the indoor heat exchanger 3, a fourth end D of the four-way valve 5 is connected to a return port of the compressor 1, that is, the first port of the indoor heat exchanger 3 may be connected to a return port of the compressor 1 through the four-way valve, the second port of the outdoor heat exchanger 2 is connected to the indoor heat.
As shown in fig. 1 and 2, a control device of an air conditioning system according to an embodiment of the present invention includes: n branches 10, N valve assemblies 11, a flow detection unit 30 and a control unit 20 connected in parallel.
The N parallel branches 10 are connected in parallel or in series with the first pipeline 6, where N is an integer greater than 1; for example, as shown in fig. 2, N branches 10 connected in parallel are connected in parallel with the first pipeline 6, and N valve assemblies 11 are correspondingly disposed in the N branches 10, each valve assembly being capable of being connected in series with a corresponding branch, each valve assembly being used for controlling the opening or closing of the corresponding branch; the flow detection unit 30 is used for detecting the refrigerant flow of the air conditioning system; the control unit 20 is connected to the N valve assemblies 11 and the flow detection unit 30, respectively, and the control unit 20 is configured to control opening or closing of the N valve assemblies 11 according to a refrigerant flow of the air conditioning system.
It should be noted that the N branches 10 may be connected in parallel between the first end C of the four-way valve 5 and the first port of the outdoor heat exchanger 2, and the flow detection unit 30 is disposed between the second port of the outdoor heat exchanger 2 and the throttling device 4, specifically, as shown in fig. 2, the N branches 10 may be disposed at the first port of the outdoor heat exchanger 2, and the flow detection unit 30 may be disposed at the second port of the outdoor heat exchanger 2, so as to obtain the refrigerant flow of the air conditioning system by detecting the refrigerant flow at the second port of the outdoor heat exchanger 2, and further, the control unit 20 controls the opening or closing of the N valve assemblies 11 according to the refrigerant flow of the air conditioning system.
Specifically, in the air conditioning system, a first port of the outdoor heat exchanger 2 is connected to the compressor 1 through a first pipeline 6, the first pipeline 6 is connected to the N branches 10 in parallel, each branch is provided with a valve assembly for controlling the opening or closing of the branch, the flow detection unit 30 can detect the refrigerant flow of the air conditioning system in real time and send the detected refrigerant flow of the air conditioning system to the control unit 20, and the control unit 20 controls the opening or closing of the N valve assemblies 11 according to the refrigerant flow of the air conditioning system.
From this, can control air conditioning system's refrigerant flow through opening or closing of control valve subassembly, and then guarantee that the overheated phenomenon can not appear in the refrigerant that gets into indoor heat exchanger to guarantee that the return air temperature of compressor can not appear undulant and the phenomenon that the temperature is higher than usual, thereby improve the refrigerating output of air conditioner, improve the reliability of compressor, promote user's experience.
According to an embodiment of the present invention, a plurality of flow intervals are configured, and the plurality of flow intervals correspond to the plurality of opening numbers, respectively, wherein the control unit 20 is further configured to obtain a flow interval to which a refrigerant flow of the air conditioning system belongs, and control the N valve assemblies 11 according to the opening number corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs.
It should be noted that a plurality of flow intervals of the refrigerant flow may be configured according to the refrigerant flow of the second port of the outdoor heat exchanger 2, and the plurality of flow intervals may correspond to the opening numbers of the plurality of valve assemblies, that is, each flow interval may correspond to one opening number, where each opening number may be an integer greater than 0 and less than or equal to N.
Specifically, a plurality of flow rate intervals may be configured by presetting a plurality of flow rate thresholds, for example, at least one flow rate threshold may be set, which is a first flow rate interval when the flow rate is less than the flow rate threshold, and is a second flow rate interval when the flow rate is equal to or greater than the flow rate threshold; for another example, two flow rate thresholds may be set, which are a first flow rate interval when the flow rate is smaller than the first flow rate threshold, a second flow rate interval when the flow rate is greater than or equal to the first flow rate threshold and less than or equal to the second flow rate threshold, and a third flow rate interval when the flow rate is greater than the second flow rate threshold; for example, three flow rate thresholds may be set, which are a first flow rate interval when the flow rate is less than the first flow rate threshold, a second flow rate interval when the flow rate is greater than or equal to the first flow rate threshold and less than or equal to the third flow rate threshold, a third flow rate interval when the flow rate is greater than the second flow rate threshold and less than or equal to the third flow rate threshold, and a fourth flow rate interval when the flow rate is greater than the third flow rate threshold. Each flow interval has the opening number of the corresponding valve components, so that the refrigerant flow of the air conditioning system is adjusted by controlling the opening of the valve components with the corresponding opening number.
Specifically, the control unit 20 may obtain the refrigerant flow rate of the air conditioning system through the flow rate detection unit 30, determine a flow rate interval to which the refrigerant flow rate belongs according to the refrigerant flow rate of the air conditioning system, and control the N valve assemblies 11 according to the opening number corresponding to the flow rate interval to which the refrigerant flow rate of the air conditioning system belongs, that is, control the valve assemblies corresponding to the opening number in the N valve assemblies 11 to open.
According to an embodiment of the present invention, when the air conditioning system performs cooling, the control unit 20 is further configured to: when the refrigerant flow of the air conditioning system is smaller than a first flow, controlling any one of the N valve assemblies 11 to be opened; when the refrigerant flow of the air conditioning system is greater than or equal to a first flow and less than or equal to a second flow, controlling any M of the N valve assemblies 11 to be opened, wherein M is an integer greater than 1 and less than N; when the refrigerant flow of the air conditioning system is greater than the second flow, the N valve assemblies 11 are all controlled to be opened.
That is, the air conditioning system may be preset with two flow thresholds, i.e., a first flow and a second flow, to construct three flow intervals, wherein the first flow interval corresponds to one valve assembly being opened, the second flow interval corresponds to M valve assemblies being opened, and the third flow interval corresponds to N valve assemblies being opened.
Specifically, when the air conditioning system performs refrigeration, the control unit 20 obtains a refrigerant flow rate of the air conditioning system, and determines a refrigerant section to which the refrigerant flow rate of the air conditioning system belongs, that is, determines a relationship between the refrigerant flow rate of the air conditioning system and a preset flow rate threshold, and if the refrigerant flow rate of the air conditioning system is smaller than a first flow rate, the control unit 20 controls any one of the N valve assemblies 11 to be opened; if the refrigerant flow of the air conditioning system is greater than or equal to the first flow and less than or equal to the second flow, the control unit 20 controls any M of the N valve assemblies 11 to be opened; if the refrigerant flow rate of the air conditioning system is greater than the second flow rate, the control unit 20 controls the N valve assemblies 11 to be opened. Wherein the first flow rate is less than the second flow rate.
It can be understood that when the refrigerant flow of the air conditioning system is large, that is, more refrigerants are required for the indoor heat exchanger 3 to refrigerate, at this time, more valve assemblies 11 are opened, and the flow of the refrigerants flowing from the outdoor heat exchanger 2 to the indoor heat exchanger 3 is increased; the refrigerant in the indoor heat exchanger 3 is sufficient, and the temperature of the refrigerant flowing from the indoor heat exchanger 3 to the compressor 1 is ensured not to be higher, namely the return air temperature of the compressor is ensured not to be increased. Therefore, the control unit 20 controls the opening or closing of the N valve assemblies 11 according to the refrigerant flow of the air conditioning system, so as to change the refrigerant flow of the air conditioning system.
Wherein, according to an embodiment of the present invention, when N is an even number, M is N/2; when N is an odd number, M is (N + 1)/2. For example, N may be set to 6, M may be set to 3, that is, 3 valve assemblies 11 may be opened when the refrigerant flow rate of the air conditioning system is greater than or equal to the first flow rate and less than or equal to the second flow rate, and the other N-3 valve assemblies (i.e., 3 valve assemblies 11) are all closed.
For example, when the air conditioning system performs cooling, the control unit 20 obtains a refrigerant flow n of the air conditioning system, and when the refrigerant flow n of the air conditioning system is smaller than a first flow n0 (i.e., n < n0), the control unit 20 controls any one of the 6 valve assemblies 11 to be opened and controls the other 5 valve assemblies 11 to be closed; when the refrigerant flow n of the air conditioning system is greater than or equal to the first flow n0 and less than or equal to the second flow n1 (i.e., n is greater than or equal to n0 and less than or equal to n is less than or equal to n1), the control unit 20 controls any 3 of the 6 valve assemblies 11 to be opened and controls the other 3 valve assemblies 11 to be closed; when the refrigerant flow rate n of the air conditioning system is greater than the second flow rate n1 (i.e. n > n1), the control unit 20 controls all of the 6 valve assemblies 11 to open.
Further, according to an embodiment of the present invention, the control unit 20 is further configured to obtain an operating frequency of the air conditioning system, and control the N valve assemblies 11 according to a refrigerant flow of the air conditioning system when the operating frequency of the air conditioning system is less than a preset frequency.
That is, if the compressor 1 is operated at a low frequency while the air conditioning system performs cooling, the N valve assemblies 11 are controlled according to the refrigerant flow rate of the air conditioning system. When the compressor 1 operates in low-frequency refrigeration, the flow rate of the refrigerant of the air conditioning system is low, the refrigerant quantity is easy to accumulate in the outdoor heat exchanger 2, more valve components 11 are opened, and the refrigerant quantity entering the indoor heat exchanger 3 is ensured to be sufficient
In addition, according to an embodiment of the present invention, the control unit 20 is further configured to control all of the N valve assemblies 11 to be opened when the operating frequency of the air conditioning system is greater than or equal to the preset frequency.
That is, when the air conditioning system performs cooling, if the compressor 1 operates at high frequency, the entire pipeline of the outdoor heat exchanger 2 is fully involved in operation, that is, all of the N valve assemblies 11 are opened, so as to satisfy the refrigerant circulation during high-frequency cooling of the air conditioning system.
In summary, according to the control device of the air conditioning system provided in the embodiment of the present invention, N branches are connected in parallel to the first pipeline connecting the first port of the outdoor heat exchanger and the compressor, N valve assemblies are correspondingly disposed on the N branches, each valve assembly is used for controlling the opening or closing of the corresponding branch, and the control unit detects the refrigerant flow of the air conditioning system through the flow monitoring unit and controls the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system. Therefore, the device provided by the embodiment of the invention can control the flow of the refrigerant of the air conditioning system by controlling the opening or closing of the valve component, so that the refrigerant entering the indoor heat exchanger is prevented from overheating, and the return air temperature of the compressor is prevented from fluctuating and having a high temperature, thereby improving the refrigerating capacity of the air conditioner, improving the reliability of the compressor and improving the user experience.
The embodiment of the invention also provides an air conditioning system.
Fig. 3 is a block schematic diagram of an air conditioning system according to an embodiment of the present invention. As shown in fig. 2, the air conditioning system 200 includes the control device 100 of the air conditioning system described above.
According to the air conditioning system provided by the embodiment of the invention, the control device of the air conditioning system ensures that the refrigerant entering the indoor heat exchanger cannot be overheated and the return air temperature of the compressor cannot be fluctuated and has a higher temperature, so that the refrigeration performance of the air conditioner is improved, the reliability of the compressor is improved and the user experience is improved.
Fig. 4 is a flowchart of a control method of an air conditioning system according to an embodiment of the present invention. Wherein, according to the embodiment of fig. 2, air conditioning system includes the compressor, outdoor heat exchanger and indoor heat exchanger, and the first port of outdoor heat exchanger links to each other with the compressor through first pipeline, and the second port of outdoor heat exchanger passes through the second pipeline and links to each other with indoor heat exchanger, N branch road parallel connection, and parallel connection's N branch road and first pipeline are parallelly connected or series connection, and N valve member corresponds and sets up in N branch road, and every valve member is used for controlling opening or closing of corresponding branch road, and N is for being greater than 1 integer. Further, as shown in fig. 2, the second port of the outdoor heat exchanger is connected to the second port of the indoor heat exchanger through a second pipeline, and the first port of the indoor heat exchanger is connected to the compressor through a third pipeline.
Specifically, as shown in fig. 2, the air conditioning system may further include a throttling device and a four-way valve, wherein a first end of the four-way valve is connected to a first port of the outdoor heat exchanger, a second end of the four-way valve is connected to a gas outlet of the compressor, that is, the first port of the outdoor heat exchanger may be connected to the gas outlet of the compressor through the four-way valve, a third end of the four-way valve is connected to a first port of the indoor heat exchanger, a fourth end of the four-way valve is connected to a return port of the compressor, that is, the first port of the indoor heat exchanger may be connected to a return port of the compressor through the four-way valve, the second port of the outdoor heat exchanger.
As shown in fig. 4, the control method of the air conditioning system according to the embodiment of the present invention includes the steps of:
s1: and detecting the refrigerant flow of the air conditioning system.
It should be noted that, according to an embodiment of the present invention, the refrigerant flow rate of the air conditioning system is obtained by detecting the refrigerant flow rate of the second port of the outdoor heat exchanger. Specifically, as shown in fig. 2, the N branches may be disposed at a first port of the outdoor heat exchanger, and the flow detection unit may be disposed at a second port of the outdoor heat exchanger.
S2: and controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system.
Specifically, when the air conditioner operates in a cooling mode, the refrigerant flow of the air conditioning system is detected, and the opening or closing of the N valve assemblies is controlled according to the refrigerant flow of the air conditioning system.
From this, can control air conditioning system's refrigerant flow through opening or closing of control valve subassembly, and then guarantee that the overheated phenomenon can not appear in the refrigerant that gets into the evaporimeter to guarantee that the return air temperature of compressor can not appear undulant and the phenomenon that the temperature is higher than usual, thereby improve the refrigerating output of air conditioner, improve the reliability of compressor, promote user's experience.
According to an embodiment of the present invention, as shown in fig. 5, a plurality of flow rate sections are configured, the plurality of flow rate sections correspond to a plurality of opening numbers, respectively, and the opening or closing of the N valve assemblies is controlled according to the refrigerant flow of the air conditioning system, as shown in fig. 5, the method for controlling the air conditioning system further includes:
s101: and acquiring a flow interval to which the refrigerant flow of the air conditioning system belongs.
S102: and controlling the N valve assemblies according to the opening number corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs.
It should be noted that a plurality of flow intervals of the refrigerant flow may be configured according to the refrigerant flow of the second port of the outdoor heat exchanger, and the plurality of flow intervals may correspond to the opening numbers of the plurality of valve assemblies, that is, each flow interval may correspond to one opening number, where each opening number may be an integer greater than 0 and less than or equal to N.
Specifically, a plurality of flow rate intervals may be configured by presetting a plurality of flow rate thresholds, for example, at least one flow rate threshold may be set, which is a first flow rate interval when the flow rate is less than the flow rate threshold, and is a second flow rate interval when the flow rate is equal to or greater than the flow rate threshold; for another example, two flow rate thresholds may be set, which are a first flow rate interval when the flow rate is smaller than the first flow rate threshold, a second flow rate interval when the flow rate is greater than or equal to the first flow rate threshold and less than or equal to the second flow rate threshold, and a third flow rate interval when the flow rate is greater than the second flow rate threshold; for example, three flow rate thresholds may be set, which are a first flow rate interval when the flow rate is less than the first flow rate threshold, a second flow rate interval when the flow rate is greater than or equal to the first flow rate threshold and less than or equal to the third flow rate threshold, a third flow rate interval when the flow rate is greater than the second flow rate threshold and less than or equal to the third flow rate threshold, and a fourth flow rate interval when the flow rate is greater than the third flow rate threshold. Each flow interval has the opening number of the corresponding valve components, so that the refrigerant flow of the air conditioning system is adjusted by controlling the opening of the valve components with the corresponding opening number.
Specifically, the refrigerant flow of the air conditioning system is obtained, the flow interval to which the refrigerant flow of the air conditioning system belongs is further obtained, and the N valve assemblies are controlled according to the opening number corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs, that is, the valve assemblies corresponding to the opening number in the N valve assemblies are controlled to be opened.
According to an embodiment of the present invention, when an air conditioning system performs cooling, controlling the opening or closing of N valve assemblies according to a refrigerant flow of the air conditioning system includes: when the refrigerant flow of the air conditioning system is smaller than the first flow, any one of the N valve components is controlled to be opened; when the refrigerant flow of the air conditioning system is greater than or equal to a first flow and less than or equal to a second flow, controlling any M paths of the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N; and when the refrigerant flow of the air conditioning system is greater than the second flow, controlling the N valve assemblies to be opened.
That is, the air conditioning system may be preset with two flow thresholds, i.e., a first flow and a second flow, to construct three flow intervals, wherein the first flow interval corresponds to one valve assembly being opened, the second flow interval corresponds to M valve assemblies being opened, and the third flow interval corresponds to N valve assemblies being opened.
Specifically, when the air conditioning system performs refrigeration, the refrigerant flow of the air conditioning system is obtained, and a refrigerant section to which the refrigerant flow of the air conditioning system belongs is judged, that is, the relationship between the refrigerant flow of the air conditioning system and a preset flow threshold value is judged, and if the refrigerant flow of the air conditioning system is smaller than a first flow, any one of the N valve assemblies is controlled to be opened; if the refrigerant flow of the air conditioning system is greater than or equal to the first flow and less than or equal to the second flow, controlling any M valve assemblies in the N valve assemblies to be opened; and if the refrigerant flow of the air conditioning system is greater than the second flow, controlling the N valve assemblies to be opened. Wherein the first flow rate is less than the second flow rate.
It can be understood that when the refrigerant flow of the air conditioning system is large, namely, more refrigerants are needed for the indoor heat exchanger to refrigerate, at the moment, more valve components are opened, the flow of the refrigerants flowing from the outdoor heat exchanger to the indoor heat exchanger is increased, so that the refrigerants in the indoor heat exchanger are sufficient, the temperature of the refrigerants flowing from the indoor heat exchanger to the compressor is ensured to rise, and namely, the return air temperature of the compressor is not high. Therefore, the opening or closing of the N valve assemblies is controlled according to the refrigerant flow of the air conditioning system, so that the refrigerant flow of the air conditioning system is changed.
Wherein, according to an embodiment of the present invention, when N is an even number, M is N/2; when N is an odd number, M is (N + 1)/2. For example, N may be set to 6, M may be set to 3, that is, 3 valve assemblies may be opened when the refrigerant flow rate of the air conditioning system is greater than or equal to the first flow rate and less than or equal to the second flow rate, and the other N-3 valve assemblies (i.e., 3 valve assemblies) are closed.
For example, when the air conditioning system performs cooling, the refrigerant flow n of the air conditioning system is obtained, and when the refrigerant flow n of the air conditioning system is smaller than the first flow n0 (i.e., n is smaller than n0), any one of the 6 valve components is controlled to be opened, and the other 5 valve components are controlled to be closed; when the refrigerant flow n of the air conditioning system is greater than or equal to a first flow n0 and less than or equal to a second flow n1 (namely n0 is greater than or equal to n and less than or equal to n1), controlling any 3 of the 6 valve assemblies to be opened, and controlling the other 3 valve assemblies to be closed; when the refrigerant flow rate n of the air conditioning system is greater than the second flow rate n1 (i.e. n > n1), the 6 valve assemblies are all controlled to be opened.
Further, according to an embodiment of the present invention, as shown in fig. 6, the control method of the air conditioning system further includes:
s201: acquiring the operating frequency of an air conditioning system;
s202: and when the operating frequency of the air conditioning system is less than the preset frequency, controlling the N valve assemblies according to the refrigerant flow of the air conditioning system.
That is, if the compressor 1 is operated at a low frequency while the air conditioning system performs cooling, the N valve assemblies 11 are controlled according to the refrigerant flow rate of the air conditioning system. When the compressor 1 operates in low-frequency refrigeration, the flow rate of the refrigerant of the air conditioning system is low, the refrigerant quantity is easy to accumulate in the outdoor heat exchanger 2, and more valve components are opened to ensure that the refrigerant quantity entering the indoor heat exchanger 3 is sufficient
In addition, according to an embodiment of the present invention, the control unit 20 is further configured to control all of the N valve assemblies 11 to be opened when the operating frequency of the air conditioning system is greater than or equal to the preset frequency.
That is, when the air conditioning system performs cooling, if the compressor 1 operates at high frequency, the entire pipeline of the outdoor heat exchanger 2 is fully involved in operation, that is, all of the N valve assemblies 11 are opened, so as to satisfy the refrigerant circulation during high-frequency cooling of the air conditioning system.
In summary, according to the control method of the air conditioning system provided by the embodiment of the invention, the opening or closing of the N valve assemblies is controlled by detecting the refrigerant flow of the air conditioning system and then controlling the flow rate of the refrigerant according to the refrigerant flow of the air conditioning system. Therefore, the method provided by the embodiment of the invention can control the flow of the refrigerant of the air conditioning system by controlling the opening or closing of the valve component, so that the refrigerant entering the indoor heat exchanger is prevented from overheating, and the return air temperature of the compressor is prevented from fluctuating and having a high temperature, thereby improving the refrigerating capacity of the air conditioner, improving the reliability of the compressor and improving the user experience.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the control method of the air conditioning system.
According to the non-transitory computer readable medium provided by the embodiment of the invention, by executing the control method of the air conditioning system, the refrigerant entering the indoor heat exchanger is ensured not to be overheated, and the return air temperature of the compressor is ensured not to be fluctuated and the temperature is higher, so that the refrigerating capacity of the air conditioner is improved, the reliability of the compressor is improved, and the user experience is improved.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the invention and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. The utility model provides an air conditioning system's controlling means, its characterized in that, air conditioning system includes compressor, outdoor heat exchanger and indoor heat exchanger, outdoor heat exchanger's first port through first pipeline with the compressor links to each other, outdoor heat exchanger's second port through the second pipeline with indoor heat exchanger links to each other, the device includes:
the N branches are connected in parallel or connected in series with the first pipeline, wherein N is an integer greater than 1;
the N valve components are correspondingly arranged on the N branches, and each valve component is used for controlling the opening or closing of the corresponding branch;
the flow detection unit is used for detecting the refrigerant flow of the air conditioning system;
the control unit is respectively connected with the N valve assemblies and the flow detection unit and is used for controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system;
the N branches are arranged at a first port of the outdoor heat exchanger, and the flow detection unit is arranged at a second port of the outdoor heat exchanger so as to obtain the refrigerant flow of the air-conditioning system by detecting the refrigerant flow of the second port of the outdoor heat exchanger.
2. The control device of an air conditioning system according to claim 1, characterized in that a plurality of flow rate sections are configured, the plurality of flow rate sections corresponding to a plurality of opening numbers, respectively, wherein,
the control unit is further configured to acquire a flow interval to which the refrigerant flow of the air conditioning system belongs, and control the N valve assemblies according to the number of openings corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs.
3. The control device of an air conditioning system according to claim 1 or 2, wherein when the air conditioning system performs cooling, the control unit is further configured to:
when the refrigerant flow of the air conditioning system is smaller than a first flow, controlling any one of the N valve assemblies to be opened;
when the refrigerant flow of the air conditioning system is greater than or equal to the first flow and less than or equal to the second flow, controlling any M of the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N;
and when the refrigerant flow of the air conditioning system is greater than the second flow, controlling the N valve assemblies to be opened.
4. The apparatus of claim 1, wherein the control unit is further configured to obtain an operating frequency of the air conditioning system, and control the N valve assemblies according to a refrigerant flow rate of the air conditioning system when the operating frequency of the air conditioning system is less than a preset frequency.
5. An air conditioning system characterized by comprising the control device of the air conditioning system according to any one of claims 1 to 4.
6. A control method of an air conditioning system is characterized in that the air conditioning system comprises a compressor, an outdoor heat exchanger, an indoor heat exchanger, N branches and N valve components, a first port of the outdoor heat exchanger is connected with the compressor through a first pipeline, a second port of the outdoor heat exchanger is connected with the indoor heat exchanger through a second pipeline, the N branches are connected in parallel, the N branches connected in parallel are connected with the first pipeline in parallel or in series, the N valve components are correspondingly arranged on the N branches, the N branches are arranged at the first port of the outdoor heat exchanger, a flow detection unit is arranged at the second port of the outdoor heat exchanger, each valve component is used for controlling the opening or closing of the corresponding branch, N is an integer greater than 1, and the method comprises the following steps:
acquiring the refrigerant flow of the air conditioning system by detecting the refrigerant flow of the second port of the outdoor heat exchanger;
and controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system.
7. The method as claimed in claim 6, wherein a plurality of flow intervals are configured, the flow intervals correspond to a plurality of opening numbers, and the controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system comprises:
acquiring a flow interval to which the refrigerant flow of the air conditioning system belongs;
and controlling the N valve assemblies according to the opening number corresponding to the flow interval to which the refrigerant flow of the air conditioning system belongs.
8. The method as claimed in claim 6 or 7, wherein the controlling the opening or closing of the N valve assemblies according to the refrigerant flow of the air conditioning system when the air conditioning system performs cooling comprises:
when the refrigerant flow of the air conditioning system is smaller than a first flow, controlling any one path of the N valve components to be opened;
when the refrigerant flow of the air conditioning system is greater than or equal to the first flow and less than or equal to the second flow, controlling any M paths of the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N;
and when the refrigerant flow of the air conditioning system is greater than the second flow, controlling the N valve assemblies to be opened.
9. The control method of an air conditioning system according to claim 6, further comprising:
acquiring the operating frequency of the air conditioning system;
and when the operating frequency of the air conditioning system is less than the preset frequency, controlling the N valve assemblies according to the refrigerant flow of the air conditioning system.
10. A non-transitory computer-readable storage medium having stored thereon a computer program, characterized in that the program, when executed by a processor, implements the control method of an air conditioning system according to any one of claims 5 to 9.
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| CN108758901A (en) * | 2018-03-22 | 2018-11-06 | 青岛海尔空调器有限总公司 | Air-conditioning system and the method and apparatus for controlling air-conditioning system hydrogen paths |
| CN109595721A (en) * | 2018-12-12 | 2019-04-09 | 江苏翼兰博特新能源科技有限公司 | A kind of leaving air temp control air-conditioning |
| CN110657550B (en) * | 2019-10-21 | 2021-11-16 | 宁波奥克斯电气股份有限公司 | Compressor oil return control method and device and air conditioner |
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| JP2009210138A (en) * | 2008-02-29 | 2009-09-17 | Mitsubishi Heavy Ind Ltd | Refrigerating cycle system |
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| CN201926224U (en) * | 2010-11-29 | 2011-08-10 | 珠海格力电器股份有限公司 | Valve component and multi-split air conditioning system |
| CN204115152U (en) * | 2014-09-30 | 2015-01-21 | 广东志高暖通设备股份有限公司 | A kind of interior machine controller of multiple on-line system |
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