CN107270517B - 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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- CN107270517B CN107270517B CN201710618837.6A CN201710618837A CN107270517B CN 107270517 B CN107270517 B CN 107270517B CN 201710618837 A CN201710618837 A CN 201710618837A CN 107270517 B CN107270517 B CN 107270517B
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- heat exchanger
- pressure
- outdoor heat
- air conditioning
- conditioning system
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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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- 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
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 pressure detection unit is used for detecting the refrigerant pressure of the outdoor heat exchanger; and the control unit is respectively connected with the N valve assemblies and the pressure detection unit and is used for controlling the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger. 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, an 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 pressure detection unit is used for detecting the refrigerant pressure of the outdoor heat exchanger; and the control unit is respectively connected with the N valve assemblies and the pressure detection unit and is used for controlling the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger.
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, the control unit detects the refrigerant pressure of the outdoor heat exchanger through the pressure detection unit and controls the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger. 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, a plurality of pressure sections are configured, and the plurality of pressure sections correspond to a plurality of opening numbers, respectively, wherein the control unit is further configured to obtain a pressure section to which a refrigerant pressure of the outdoor heat exchanger belongs, and control the N valve assemblies according to the opening number corresponding to the pressure section to which the refrigerant pressure of the outdoor heat exchanger 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 pressure of the outdoor heat exchanger is lower than a first pressure, any one of the N valve assemblies is controlled to be opened; when the refrigerant pressure of the outdoor heat exchanger is greater than or equal to the first pressure and less than or equal to the second pressure, 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 pressure of the outdoor heat exchanger is greater than the second pressure, controlling the N valve assemblies to be opened.
According to an embodiment of the present invention, the N branches are disposed at a first port of the outdoor heat exchanger, and the pressure detection unit is disposed at a second port of the outdoor heat exchanger, so as to obtain a refrigerant pressure of the outdoor heat exchanger by detecting the refrigerant pressure at the second port of the outdoor heat exchanger.
according to an embodiment of the present invention, 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 pressure of the outdoor heat exchanger 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 pressure of the outdoor heat exchanger; and controlling the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger.
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 components is controlled according to the refrigerant pressure of the outdoor heat exchanger by detecting the refrigerant pressure of the outdoor heat exchanger. 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, configuring a plurality of pressure sections, the plurality of pressure sections corresponding to a plurality of opening numbers, respectively, and controlling opening or closing of the N valve assemblies according to a refrigerant pressure of the outdoor heat exchanger includes: acquiring a pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs; and controlling the N valve assemblies according to the opening number corresponding to the pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs.
according to an embodiment of the present invention, when the air conditioning system performs cooling, the controlling the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger includes: when the refrigerant pressure of the outdoor heat exchanger is lower than a first pressure, any one path of the N valve components is controlled to be opened; when the refrigerant pressure of the outdoor heat exchanger is greater than or equal to the first pressure and less than or equal to the second pressure, controlling any M paths in the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N; and when the refrigerant pressure of the outdoor heat exchanger is greater than the second pressure, controlling the N valve assemblies to be opened.
According to an embodiment of the present invention, the refrigerant pressure of the outdoor heat exchanger is obtained by detecting the refrigerant pressure at the second port of the outdoor heat exchanger.
According to an embodiment of the present invention, the control method of an 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 pressure of the outdoor heat exchanger.
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 pressure 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, 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, N valve assemblies 11 are correspondingly disposed on the N branches 10, each valve assembly can be connected in series with a corresponding branch, and each valve assembly is used for controlling the opening or closing of the corresponding branch; the pressure detection unit 30 is used for detecting the refrigerant pressure of the outdoor heat exchanger 2; the control unit 20 is connected to the N valve assemblies 11 and the pressure detection unit 30, respectively, and the control unit 20 is configured to control opening or closing of the N valve assemblies 11 according to the refrigerant pressure of the outdoor heat exchanger 2.
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 pressure 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 pressure detection unit 30 may be disposed at the second port of the outdoor heat exchanger 2 to obtain the refrigerant pressure of the outdoor heat exchanger 2 by detecting the refrigerant pressure at the second port of the outdoor heat exchanger 2, so that the control unit 20 controls the opening or closing of the N valve assemblies 11 according to the refrigerant pressure of the outdoor heat exchanger 2.
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, the first pipeline 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 pressure detection unit 30 can detect the refrigerant pressure of the outdoor heat exchanger 2 in real time and send the detected refrigerant pressure of the outdoor heat exchanger 2 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 pressure of the outdoor heat exchanger 2.
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 pressure sections are configured, and the plurality of pressure sections correspond to the plurality of opening numbers, respectively, wherein the control unit is further configured to obtain a pressure section to which the refrigerant pressure of the outdoor heat exchanger 2 belongs, and control the N valve assemblies according to the opening number corresponding to the pressure section to which the refrigerant pressure of the outdoor heat exchanger 2 belongs.
It should be noted that a plurality of pressure intervals of the refrigerant pressure may be configured according to the refrigerant pressure of the second port of the outdoor heat exchanger 2, and the plurality of pressure intervals may correspond to the opening numbers of the plurality of valve assemblies, that is, each pressure 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 pressure intervals may be configured by presetting a plurality of pressure thresholds, for example, at least one pressure threshold may be set, a first pressure interval when the pressure is less than the pressure threshold, and a second pressure interval when the pressure is equal to or greater than the pressure threshold; for another example, two pressure thresholds may be set, a first pressure interval when the pressure is less than the first pressure threshold, a second pressure interval when the pressure is greater than or equal to the first pressure threshold and less than or equal to the second pressure threshold, and a third pressure interval when the pressure is greater than the second pressure threshold; for example, three pressure thresholds may be set, which are a first pressure interval when the pressure is less than the first pressure threshold, a second pressure interval when the pressure is greater than or equal to the first pressure threshold and less than or equal to the third pressure threshold, a third pressure interval when the pressure is greater than the second pressure threshold and less than or equal to the third pressure threshold, and a fourth pressure interval when the pressure is greater than the third pressure threshold. Each pressure interval has the opening number of the corresponding valve components, so that the refrigerant pressure of the outdoor heat exchanger is adjusted by controlling the opening of the valve components with the corresponding opening number.
Specifically, the control unit 20 may obtain the refrigerant pressure of the outdoor heat exchanger 2 through the pressure detection unit 30, determine a pressure interval to which the refrigerant pressure belongs according to the refrigerant pressure of the outdoor heat exchanger 2, and control the N valve assemblies 11 according to the opening number corresponding to the pressure interval to which the refrigerant pressure of the outdoor heat exchanger 2 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 pressure of the outdoor heat exchanger 2 is lower than the first pressure, any one of the N valve assemblies 11 is controlled to be opened; when the refrigerant pressure of the outdoor heat exchanger 2 is greater than or equal to a first pressure and less than or equal to a second pressure, controlling any M of the N valve assemblies 11 to be opened, wherein M is an integer greater than 1 and less than N; and when the refrigerant pressure of the outdoor heat exchanger 2 is higher than the second pressure, controlling the N valve assemblies 11 to be opened.
That is, the air conditioning system may be preset with two pressure thresholds, i.e. a first pressure and a second pressure, to construct three pressure intervals, wherein the first pressure interval corresponds to one valve assembly opening, the second pressure interval corresponds to M valve assemblies opening, and the third pressure interval corresponds to N valve assemblies 11 opening.
Specifically, when the air conditioning system performs refrigeration, the control unit 20 obtains the refrigerant pressure of the outdoor heat exchanger 2, and determines a refrigerant section to which the refrigerant pressure of the outdoor heat exchanger 2 belongs, that is, determines a relationship between the refrigerant pressure of the outdoor heat exchanger 2 and a preset pressure threshold, and if the refrigerant pressure of the outdoor heat exchanger 2 is smaller than a first pressure, the control unit 20 controls any one of the N valve assemblies 11 to be opened; if the refrigerant pressure of the outdoor heat exchanger 2 is greater than or equal to the first pressure and less than or equal to the second pressure, the control unit 20 controls any M of the N valve assemblies 11 to be opened; if the refrigerant pressure of the exterior heat exchanger 2 is higher than the second pressure, the control unit 20 controls the N valve assemblies 11 to be opened. Wherein the first pressure is less than the second pressure.
It can be understood that when the refrigerant pressure of the outdoor heat exchanger 2 is higher, that is, more refrigerant is needed for the indoor heat exchanger 3 to refrigerate, at this time, more valve assemblies 11 are opened, and the pressure of the refrigerant 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. Accordingly, the control unit 20 controls the opening or closing of the N valve assemblies 11 according to the refrigerant pressure of the exterior heat exchanger 2 to change the refrigerant pressure of the exterior heat exchanger 2.
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 pressure of the outdoor heat exchanger 2 is equal to or higher than the first pressure and equal to or lower than the second pressure, and the other N-3 valve assemblies (i.e., 3 valve assemblies) 11 are closed.
For example, when the air conditioning system performs cooling, the control unit 20 obtains the refrigerant pressure p of the exterior heat exchanger 2, and when the refrigerant pressure p of the exterior heat exchanger is less than the first pressure p0 (i.e., p < p0), 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 pressure p of the outdoor heat exchanger 2 is greater than or equal to the first pressure p0 and less than or equal to the second pressure p1 (i.e., p is greater than or equal to p0 and less than or equal to p1), 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 pressure p of the exterior heat exchanger 2 is greater than the second pressure (i.e., p > p1), the control unit 20 controls 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 the refrigerant pressure of the outdoor heat exchanger 2 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 pressure of the outdoor heat exchanger 2. 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 pressure of the outdoor heat exchanger through the pressure detection unit and controls the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger. 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.
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. According to the embodiment of fig. 2, the air conditioning system comprises a compressor, an outdoor heat exchanger and an indoor heat exchanger, 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, N branches are connected with the first pipeline in parallel, N valve assemblies are correspondingly arranged on the N branches, each valve assembly is used for controlling the opening or closing of the corresponding branch, and N is an integer greater than 1. 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 pressure of the outdoor heat exchanger.
It should be noted that, according to an embodiment of the present invention, the refrigerant pressure of the outdoor heat exchanger is obtained by detecting the refrigerant pressure at the second port of the outdoor heat exchanger. Specifically, as shown in fig. 2, the N branches may be disposed at the first port of the outdoor heat exchanger, and the pressure detection unit may be disposed at the second port of the outdoor heat exchanger.
S2: and controlling the opening or closing of the N valve components according to the refrigerant pressure of the outdoor heat exchanger.
specifically, when the air conditioner operates in a cooling mode, the refrigerant pressure of the outdoor heat exchanger is detected, and the opening or closing of the N valve assemblies is controlled according to the refrigerant pressure of the outdoor heat exchanger.
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, a plurality of pressure sections are configured, the plurality of pressure sections respectively correspond to a plurality of opening numbers, and the opening or closing of the N valve assemblies is controlled according to the refrigerant of the outdoor heat exchanger, as shown in fig. 5, the method for controlling an air conditioning system further includes:
S101: and acquiring a pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs.
S102: and controlling the N valve assemblies according to the opening number corresponding to the pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs.
It should be noted that a plurality of pressure intervals of the refrigerant pressure may be configured according to the refrigerant pressure of the second port of the outdoor heat exchanger, and the plurality of pressure intervals may correspond to the opening numbers of the plurality of valve assemblies, that is, each pressure 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 pressure intervals may be configured by presetting a plurality of pressure thresholds, for example, at least one pressure threshold may be set, a first pressure interval when the pressure is less than the pressure threshold, and a second pressure interval when the pressure is equal to or greater than the pressure threshold; for another example, two pressure thresholds may be set, a first pressure interval when the pressure is less than the first pressure threshold, a second pressure interval when the pressure is greater than or equal to the first pressure threshold and less than or equal to the second pressure threshold, and a third pressure interval when the pressure is greater than the second pressure threshold; for example, three pressure thresholds may be set, which are a first pressure interval when the pressure is less than the first pressure threshold, a second pressure interval when the pressure is greater than or equal to the first pressure threshold and less than or equal to the third pressure threshold, a third pressure interval when the pressure is greater than the second pressure threshold and less than or equal to the third pressure threshold, and a fourth pressure interval when the pressure is greater than the third pressure threshold. Each pressure interval has the opening number of the corresponding valve components, so that the refrigerant pressure of the outdoor heat exchanger is adjusted by controlling the opening of the valve components with the corresponding opening number.
Specifically, the refrigerant pressure of the outdoor heat exchanger can be obtained through the pressure detection unit, the pressure section to which the refrigerant pressure belongs is judged according to the refrigerant pressure of the outdoor heat exchanger, and the N valve assemblies are controlled according to the opening number corresponding to the pressure section to which the refrigerant pressure of the outdoor heat exchanger 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 the air conditioning system performs cooling, the controlling of the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger includes: when the refrigerant pressure of the outdoor heat exchanger is lower than the first pressure, any one of the N valve components is controlled to be opened; when the refrigerant pressure of the outdoor heat exchanger is greater than or equal to a first pressure and less than or equal to a second pressure, controlling any M valve assemblies in the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N; and when the refrigerant pressure of the outdoor heat exchanger is higher than the second pressure, controlling the N valve assemblies to be opened.
That is, the air conditioning system may be preset with two pressure thresholds, i.e. a first pressure and a second pressure, to construct three pressure intervals, wherein the first pressure interval corresponds to one valve assembly opening, the second pressure interval corresponds to M valve assemblies opening, and the third pressure interval corresponds to N valve assemblies opening.
Specifically, when the air conditioning system performs refrigeration, the refrigerant pressure of the outdoor heat exchanger is obtained, and a refrigerant section to which the refrigerant pressure of the outdoor heat exchanger belongs is judged, namely, the relationship between the refrigerant pressure of the outdoor heat exchanger and a preset pressure threshold is judged, and if the refrigerant pressure of the outdoor heat exchanger is smaller than a first pressure, any one of the N valve assemblies is controlled to be opened; if the refrigerant pressure of the outdoor heat exchanger is greater than or equal to the first pressure and less than or equal to the second pressure, controlling any M valve assemblies in the N valve assemblies to be opened; and if the refrigerant pressure of the outdoor heat exchanger is greater than the second pressure, controlling the N valve assemblies to be opened. Wherein the first pressure is less than the second pressure.
It can be understood that when the refrigerant pressure of the outdoor heat exchanger is higher, that is, more refrigerant is needed for the indoor heat exchanger to refrigerate, at the moment, more valve components are opened, and the pressure of the refrigerant flowing from the outdoor heat exchanger to the indoor heat exchanger is increased; the refrigerant in the indoor heat exchanger is sufficient, the temperature of the refrigerant flowing from the indoor heat exchanger to the compressor is ensured not to be higher, namely the return air temperature of the compressor is ensured not to be increased. Therefore, the opening or closing of the N valve components is controlled according to the refrigerant pressure of the outdoor heat exchanger, so that the refrigerant pressure of the outdoor heat exchanger 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, and M may be set to 3, that is, 3 valve assemblies may be opened when the refrigerant pressure of the outdoor heat exchanger is equal to or higher than the first pressure and equal to or lower than the second pressure, and the other N-3 valve assemblies (i.e., 3 valve assemblies) are closed.
for example, when the air conditioning system performs cooling, the control unit 20 obtains the refrigerant pressure p of the outdoor heat exchanger, and when the refrigerant pressure p of the outdoor heat exchanger is less than the first pressure p0 (i.e., p < p0), controls any one of the 6 valve assemblies to open, and controls the other 5 valve assemblies to close; when the refrigerant pressure p of the outdoor heat exchanger is greater than or equal to the first pressure p0 and less than or equal to the second pressure p1 (namely p0 is greater than or equal to p1), controlling any 3 of the 6 valve assemblies to be opened, and controlling the other 3 valve assemblies to be closed; when the refrigerant pressure p of the outdoor heat exchanger is higher than the second pressure p1 (i.e. p > p1), the 6 valve assemblies are all controlled to be opened. Wherein the first pressure P0 may be 2 mpa and the second pressure P1 may be 4 mpa.
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 pressure of the outdoor heat exchanger.
That is, when the air conditioning system performs cooling, if the compressor is operated at a low frequency, the N valve assemblies are controlled according to the refrigerant pressure of the outdoor heat exchanger. When the compressor 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, more valve components are opened, and the refrigerant quantity entering the indoor heat exchanger is ensured to be sufficient
In addition, according to an embodiment of the present invention, when the operation frequency of the air conditioning system is greater than or equal to the preset frequency, the N valve assemblies are controlled to be fully opened.
That is to say, when the air conditioning system performs refrigeration, if the compressor runs at high frequency, the whole pipeline of the outdoor heat exchanger takes part in action, that is, the N valve components are all opened, so as to meet the requirement of refrigerant circulation during high-frequency refrigeration 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 according to the refrigerant pressure of the outdoor heat exchanger by detecting the refrigerant pressure of the outdoor heat exchanger. 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.
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 pressure detection unit is used for detecting the refrigerant pressure of the outdoor heat exchanger;
The control unit is connected with the N valve assemblies and the pressure detection unit respectively, and is further used for acquiring the operating frequency of the air conditioning system, controlling the N valve assemblies to be completely opened when the operating frequency of the air conditioning system is greater than or equal to a preset frequency, and controlling the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger when the operating frequency of the air conditioning system is less than the preset frequency.
2. The control device of an air conditioning system according to claim 1, wherein a plurality of pressure sections are configured, the plurality of pressure sections corresponding to a plurality of opening numbers, respectively, wherein,
The control unit is further used for acquiring a pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs, and controlling the N valve assemblies according to the opening number corresponding to the pressure interval to which the refrigerant pressure of the outdoor heat exchanger 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 pressure of the outdoor heat exchanger is lower than a first pressure, any one of the N valve assemblies is controlled to be opened;
when the refrigerant pressure of the outdoor heat exchanger is greater than or equal to the first pressure and less than or equal to the second pressure, 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 pressure of the outdoor heat exchanger is greater than the second pressure, controlling the N valve assemblies to be opened.
4. The apparatus of claim 1, wherein the N branches are disposed at a first port of the outdoor heat exchanger, and the pressure detecting unit is disposed at a second port of the outdoor heat exchanger, so as to obtain the refrigerant pressure of the outdoor heat exchanger by detecting the refrigerant pressure at the second port of the outdoor heat exchanger.
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 assemblies, 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 assemblies are correspondingly arranged on the N branches, each valve assembly 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:
The method comprises the steps of obtaining the operating frequency of the air conditioning system, controlling the N valve assemblies to be completely opened when the operating frequency of the air conditioning system is larger than or equal to a preset frequency, detecting the refrigerant pressure of the outdoor heat exchanger when the operating frequency of the air conditioning system is smaller than the preset frequency, and controlling the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger.
7. The method as claimed in claim 6, wherein a plurality of pressure sections are configured, the plurality of pressure sections respectively correspond to a plurality of opening numbers, and the controlling of the opening or closing of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger comprises:
Acquiring a pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs;
And controlling the N valve assemblies according to the opening number corresponding to the pressure interval to which the refrigerant pressure of the outdoor heat exchanger belongs.
8. The method as claimed in claim 6 or 7, wherein the controlling of the N valve assemblies according to the refrigerant pressure of the outdoor heat exchanger to open or close when the air conditioning system performs cooling comprises:
When the refrigerant pressure of the outdoor heat exchanger is lower than a first pressure, any one path of the N valve components is controlled to be opened;
when the refrigerant pressure of the outdoor heat exchanger is greater than or equal to the first pressure and less than or equal to the second pressure, controlling any M paths in the N valve assemblies to be opened, wherein M is an integer greater than 1 and less than N;
And when the refrigerant pressure of the outdoor heat exchanger is greater than the second pressure, controlling the N valve assemblies to be opened.
9. The control method of the air conditioning system as claimed in claim 6, wherein the refrigerant pressure of the outdoor heat exchanger is obtained by detecting a refrigerant pressure at the second port of the outdoor heat exchanger.
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 6 to 9.
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| CN114459178B (en) * | 2022-03-29 | 2023-08-29 | 重庆美的通用制冷设备有限公司 | Heat exchange unit and air conditioning equipment |
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| JPH0821668A (en) * | 1994-07-05 | 1996-01-23 | Mitsubishi Electric Corp | Air conditioner |
| EP1857363A1 (en) * | 2006-05-19 | 2007-11-21 | Lebrun Nimy | Temperature regulating device |
| CN102635926B (en) * | 2012-04-26 | 2018-08-24 | 青岛海尔空调电子有限公司 | Air-conditioning system and pressure method of adjustment for air-conditioning system |
| KR101254934B1 (en) * | 2012-10-08 | 2013-04-16 | 주식회사 이지이엔씨 | High efficiency homoiothermic humidistat for clean room utilizing waste heat air conditioner for precision control |
| CN203907965U (en) * | 2014-04-30 | 2014-10-29 | 广东美的集团芜湖制冷设备有限公司 | An air-conditioner heat exchange system |
| CN205014725U (en) * | 2015-09-07 | 2016-02-03 | 杭州溢达机电制造有限公司 | Cold quick -witted dew point regulation and control system of doing |
| CN106403348B (en) * | 2016-11-28 | 2022-07-01 | 广州华凌制冷设备有限公司 | Air conditioner and refrigeration control method thereof |
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