CN113280398B - Air conditioning unit and control method thereof - Google Patents
Air conditioning unit and control method thereof Download PDFInfo
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- CN113280398B CN113280398B CN202110656975.XA CN202110656975A CN113280398B CN 113280398 B CN113280398 B CN 113280398B CN 202110656975 A CN202110656975 A CN 202110656975A CN 113280398 B CN113280398 B CN 113280398B
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/0003—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station characterised by a split arrangement, wherein parts of the air-conditioning system, e.g. evaporator and condenser, are in separately located units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention discloses an air conditioning unit and a control method thereof, wherein the air conditioning unit comprises: an outdoor unit; one end of the refrigerant branch is connected with the first connecting point, and the other end of the refrigerant branch is connected with the second connecting point; the first connecting point is positioned on a pipeline of a refrigerant outlet of the outdoor unit, and the second connecting point is positioned on a pipeline between the first connecting point and the refrigerant outlet of the outdoor unit; the refrigerant inlet of the indoor unit is connected with the refrigerant branch, and the refrigerant outlet of the indoor unit is connected with the refrigerant inlet of the outdoor unit; and the flow regulating valve is positioned at the joint of the refrigerant inlet of the indoor unit and the refrigerant branch and is used for regulating the flow of the refrigerant entering the indoor unit. The invention solves the problem of unreasonable refrigerant distribution of a plurality of inner machines of the one-driving-more condensing unit in the prior art, enables the refrigerant flow of each inner machine to be matched with the requirement, and improves the heat exchange effect of the whole machine.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning unit and a control method thereof.
Background
The multi-connected air conditioning unit, such as a condensing unit with multiple indoor units, has multiple indoor units, and each branch of the condensing unit with multiple indoor units has unbalanced flow distribution, so that the heat exchange effect of refrigerant of part of the indoor units is poor. In addition, when the one-driving-multiple condensing unit adopts electric heating defrosting, the refrigerant in the inner machine can absorb heat generated by electric heating, the defrosting time of the inner machine is prolonged, and the power consumption of defrosting is increased.
Aiming at the problem of unreasonable refrigerant distribution of a plurality of inner machines of a one-driving-more condensing unit in the related art, no effective solution is provided at present.
Disclosure of Invention
The invention provides an air conditioning unit and a control method thereof, which at least solve the problem of unreasonable refrigerant distribution of a plurality of inner units of a multi-split condensing unit in the prior art.
In order to solve the above technical problem, according to an aspect of an embodiment of the present invention, there is provided an air conditioning unit including: an outdoor unit 1; one end of the refrigerant branch is connected with the first connecting point, and the other end of the refrigerant branch is connected with the second connecting point; wherein, the first connection point is positioned on the pipeline of the refrigerant outlet of the outdoor unit 1, and the second connection point is positioned on the pipeline between the first connection point and the refrigerant outlet of the outdoor unit 1; the indoor unit 2 is provided with a refrigerant inlet of the indoor unit 2 connected with a refrigerant branch, and a refrigerant outlet of the indoor unit 2 connected with a refrigerant inlet of the outdoor unit 1; and the flow regulating valve 3 is positioned at the joint of the refrigerant inlet of the indoor unit 2 and the refrigerant branch and is used for regulating the flow of the refrigerant entering the indoor unit 2.
Further, the flow control valve 3 is a three-way valve, an inlet and a first outlet of the three-way valve are both connected with the refrigerant branch, and a second outlet of the three-way valve is connected with the refrigerant inlet of the indoor unit 2.
Further, the method also comprises the following steps: and a circulation pump 4 disposed between a refrigerant outlet of the indoor unit 2 and a refrigerant inlet of the outdoor unit 1, for extracting the refrigerant remaining in the indoor unit 2 when the indoor unit 2 defrosts.
Further, still include: and the first check valve 5 is positioned on a pipeline between the refrigerant outlet of the indoor unit 2 and the circulating pump 4.
Further, still include: and the second one-way valve 6 is positioned on the refrigerant branch between the flow regulating valve 3 and the second connecting point.
Further, still include: the indoor unit mainboard 7 is connected with the indoor unit 2, the flow regulating valve 3 and the circulating pump 4 and is used for collecting the operation parameters of the indoor unit 2 and controlling the operation of the indoor unit 2, the flow regulating valve 3 and the circulating pump 4; and the outdoor unit mainboard 8 is connected with the outdoor unit 1 and the indoor unit mainboard 7 and is used for collecting the operation parameters of the outdoor unit 1, controlling the operation of the outdoor unit 1 and controlling the indoor unit mainboard 7.
Further, the indoor units 2 include one or more; when the indoor units 2 comprise a plurality of indoor units, a flow regulating valve 3 is correspondingly arranged at the joint of the refrigerant inlet of each indoor unit 2 and the refrigerant branch.
Further, the indoor unit 2 further includes: and the electric heating device is used for heating and defrosting the indoor unit 2.
According to another aspect of the embodiments of the present invention, there is provided an air conditioning unit control method, applied to the air conditioning unit, including: detecting the running state of the indoor unit; and controlling a flow regulating valve corresponding to the indoor unit according to the running state so as to regulate the flow of the refrigerant entering the indoor unit.
Further, the operation state includes at least a cooling operation; when the running state is when refrigerating the operation, according to the flow control valve that the running state control indoor set corresponds, include: and detecting the superheat degree of the refrigerant at the outlet of the indoor unit, and adjusting the opening of the flow regulating valve according to the superheat degree of the refrigerant.
Furthermore, the opening degree of the flow regulating valve is regulated according to the superheat degree of the refrigerant, and the method comprises the following steps: when the superheat degree of the refrigerant is smaller than a preset value, controlling a flow regulating valve to reduce the refrigerant flow of the first branch; the first branch is a passage of the flow regulating valve to a refrigerant inlet of the indoor unit; when the superheat degree of the refrigerant is larger than a preset value, controlling a flow regulating valve to increase the refrigerant flow of the first branch; when the superheat degree of the refrigerant is equal to a preset value, the flow control valve is controlled to keep the refrigerant flow of the first branch unchanged.
Further, the operation state at least comprises defrosting operation; when the running state is for defrosting the operation, according to the flow control valve that the running state control indoor set corresponds, include: and controlling the flow regulating valve to be closed.
Further, after controlling the flow control valve corresponding to the indoor unit according to the operation state, the method further comprises the following steps: controlling a circulating pump corresponding to the indoor unit to be started, and pumping out the refrigerant reserved in the indoor unit; after all the refrigerants reserved in the indoor unit are pumped out, the circulating pump is controlled to be closed, and the electric heating device in the indoor unit is controlled to be opened.
Further, after detecting the operation state of the indoor unit, the method further includes: when the running states of all the indoor units are defrosting running, controlling the outdoor unit to shut down; otherwise, controlling the outdoor unit to keep running.
According to yet another aspect of an embodiment of the present invention, there is provided a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
The invention provides a multi-split condensing unit, wherein a flow regulating valve is respectively arranged at the inlet of a branch corresponding to each indoor unit, and the flow regulating valves regulate and distribute the flow of a refrigerant of the corresponding branch, so that the heat exchange effect of the indoor units meets the requirement, the problem of unreasonable refrigerant distribution of a plurality of indoor units of the multi-split condensing unit in the prior art is effectively solved, the refrigerant flow of each indoor unit is matched with the requirement, and the heat exchange effect of the whole condensing unit is improved.
Drawings
Fig. 1 is a schematic view of an alternative configuration of an air conditioning assembly according to an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating an alternative connection relationship between an inner unit main board and an outer unit main board according to an embodiment of the present invention;
FIG. 3 is an alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention;
fig. 4 is another alternative flow chart of an air conditioning unit control method according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present invention. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the invention, as detailed in the appended claims.
Example 1
In a preferred embodiment 1 of the present invention, an air conditioning unit is provided, which may be a heat pump unit or a condensing unit, especially a multi-split condensing unit. In particular, fig. 1 shows an alternative structural schematic of the air conditioning assembly, which, as shown in fig. 1, comprises:
an outdoor unit (1);
one end of the refrigerant branch is connected with the first connecting point, and the other end of the refrigerant branch is connected with the second connecting point; wherein, the first connection point is positioned on the pipeline of the refrigerant outlet of the outdoor unit 1, and the second connection point is positioned on the pipeline between the first connection point and the refrigerant outlet of the outdoor unit 1;
the indoor unit 2, the refrigerant inlet of the indoor unit 2 is connected with the refrigerant branch, and the refrigerant outlet of the indoor unit 2 is connected with the refrigerant inlet of the outdoor unit 1; the indoor units 2 include one or more indoor units, and fig. 1 shows a case where the number of the indoor units 2 is plural;
and the flow regulating valve 3 is positioned at the joint of the refrigerant inlet of the indoor unit 2 and the refrigerant branch and is used for regulating the flow of the refrigerant entering the indoor unit 2. When the indoor units 2 include a plurality of flow control valves 3, the flow control valves 3 are disposed in one-to-one correspondence with the indoor units 2, and one flow control valve 3 is disposed at a connection between a refrigerant inlet of each indoor unit 2 and a refrigerant branch. As shown in fig. 1, the indoor unit 2 includes a plurality of indoor units 21 and 22. . . 2N; correspondingly, the flow control valve 3 also includes a plurality of valves 31 and 32. . . 3N, N indicates the number of indoor units 2.
In the above embodiment, a one-driving-multiple condensing unit is provided, wherein a flow regulating valve is respectively arranged at a branch inlet corresponding to each internal unit, and the flow regulating valve regulates and distributes the flow of the refrigerant of the corresponding branch, so that the heat exchange effect of the internal units meets the requirement, the problem that the refrigerant of the multiple internal units of the one-driving-multiple condensing unit is unreasonable in the prior art is effectively solved, the refrigerant flow of each internal unit is adapted to the requirement, and the heat exchange effect of the whole unit is improved.
As shown in fig. 1, the flow control valve 3 is a three-way valve, an inlet and a first outlet of the three-way valve are both connected to the refrigerant branch, and a second outlet of the three-way valve is connected to the refrigerant inlet of the indoor unit 2. The three-way valve is provided with two refrigerants and comprises a first branch and a second branch, wherein the first branch is a passage leading the flow regulating valve 3 to the refrigerant inlet of the indoor unit 2, namely a passage between the inlet and the second outlet of the three-way valve; the second branch is a flow rate which is a passage between the inlet and the first outlet of the three-way valve; the flow regulating valve 3 is used for regulating the flow of the refrigerant entering the indoor unit 2, and specifically, the flow of the first branch is regulated by regulating the opening degree of the first branch, that is, the flow of the refrigerant entering the indoor unit 2 is regulated, so that the heat exchange effect of the indoor unit is optimal.
In addition to the above-mentioned multiple indoor units defrosting individually, the present solution further includes a circulating pump 4, which is located between the refrigerant outlet of the indoor unit 2 and the refrigerant inlet of the outdoor unit 1, and is used for extracting the refrigerant remaining in the indoor unit 2 when the indoor unit 2 defrosts. As shown in fig. 1, when the indoor unit 2 includes a plurality of circulation pumps 41 and 42, respectively, the circulation pumps correspond to the plurality of indoor units. . . 4N, and (3).
When the multi-split condensing unit adopts electric heating for defrosting, the refrigerant in the inner machine can absorb the heat generated by electric heating, thereby prolonging the defrosting time of the inner machine and increasing the power consumption of defrosting. Consequently, adopt circulating pump 4 to take out the refrigerant of interior machine in this scheme to accelerate the defrosting process, avoid the unnecessary energy loss of defrosting in-process, solve the defrosting time that leads to because of the refrigerant during the electrical heating defrosting, power consumptive many problem, energy-conserving power saving.
In addition, in order to prevent the refrigerant from flowing reversely, the unit further comprises: and the first check valve 5 is positioned on a pipeline between the refrigerant outlet of the indoor unit 2 and the circulating pump 4. As shown in fig. 1, when the indoor unit 2 includes a plurality of first check valves, the first check valve includes a plurality of first check valves 51 and 52. . . 5N, is added. And the second one-way valve 6 is positioned on the refrigerant branch between the flow regulating valve 3 and the second connecting point. As shown in fig. 1, the second outlet of the three-way valve N is connected to the inner unit N, the first outlet is connected to the outlet of the outer unit N, and a check valve is disposed therebetween, and during cooling or defrosting of each inner unit, the excessive refrigerant flows through the check valve via the first outlet of the three-way valve N and flows back to the refrigerant outlet of the outer unit.
In order to realize accurate control of each component of the air conditioner unit, the air conditioner unit further comprises an inner unit main board 7 and an outer unit main board 8, and fig. 2 shows a connection mode of the inner unit main board 7 and the outer unit main board 8, as shown in fig. 2: the indoor unit mainboard 7 is connected with the indoor unit 2, the flow regulating valve 3 and the circulating pump 4 and is used for acquiring the operation parameters of the indoor unit 2 and controlling the operation of the indoor unit 2, the flow regulating valve 3 and the circulating pump 4; and the outdoor unit main board 8 is connected with the outdoor unit 1 and the indoor unit main board 7 and is used for collecting the operation parameters of the outdoor unit 1, controlling the operation of the outdoor unit 1 and controlling the indoor unit main board 7.
In the air conditioning unit, each internal machine is provided with a corresponding internal machine mainboard, the state parameters of the corresponding internal machine are detected, a three-way valve is respectively arranged at the inlet of a branch circuit corresponding to each internal machine, and a one-way valve and a circulating pump are respectively arranged at the outlet of the branch circuit corresponding to each internal machine. When the internal machine performs refrigeration operation, the corresponding three-way valve adjusts and distributes the refrigerant flow of the corresponding branch according to the state of the internal machine, so that the heat exchange effect of the internal machine meets the design requirement; when the internal machine carries out electric heating defrosting, the corresponding three-way valve carries out flow regulation distribution, so that no refrigerant flows through the corresponding branch, the circulating pump runs, the refrigerant in the internal machine is pumped out of the internal machine and then stops running, the electric heating is started to carry out defrosting mode until defrosting of the corresponding branch is finished, and the state is restored to the state when refrigerating is carried out.
Through the arrangement, each branch of the air conditioning unit is balanced in shunting, the heat exchange effect of the refrigerant of each internal unit is optimal, the problems of long defrosting time and high power consumption caused by the refrigerant during electric heating defrosting are solved, and energy and power are saved.
Example 2
In a preferred embodiment 2 of the present invention, there is provided an air conditioning unit control method applied to the air conditioning unit in the above embodiment 1. Specifically, fig. 3 shows an alternative flowchart of the method, and as shown in fig. 3, the method includes the following steps S302-S304:
s302: detecting the running state of the indoor unit;
s304: and controlling a flow regulating valve corresponding to the indoor unit according to the running state so as to regulate the flow of the refrigerant entering the indoor unit.
In the above embodiment, a one-driving-multiple condensing unit is provided, wherein a flow regulating valve is respectively arranged at a branch inlet corresponding to each internal unit, and the flow regulating valve regulates and distributes the flow of the refrigerant of the corresponding branch, so that the heat exchange effect of the internal units meets the requirement, the problem that the refrigerant of the multiple internal units of the one-driving-multiple condensing unit is unreasonable in the prior art is effectively solved, the refrigerant flow of each internal unit is adapted to the requirement, and the heat exchange effect of the whole unit is improved.
Wherein, the operation state at least comprises refrigeration operation and defrosting operation; when the running state is during refrigeration operation, according to the flow control valve that running state control indoor set corresponds, include: and detecting the superheat degree of the refrigerant at the outlet of the indoor unit, and adjusting the opening of the flow regulating valve according to the superheat degree of the refrigerant. When the superheat degree of the refrigerant is smaller than a preset value, the flow regulating valve is controlled to reduce the refrigerant flow of the first branch; the first branch is a passage of the flow regulating valve to a refrigerant inlet of the indoor unit; when the superheat degree of the refrigerant is larger than a preset value, controlling a flow regulating valve to increase the refrigerant flow of the first branch; when the superheat degree of the refrigerant is equal to a preset value, the flow control valve is controlled to keep the refrigerant flow of the first branch unchanged. In the air conditioning unit, each internal machine is provided with a corresponding internal machine mainboard, the state parameters of the corresponding internal machine are detected, a three-way valve is respectively arranged at the inlet of a branch circuit corresponding to each internal machine, and a one-way valve and a circulating pump are respectively arranged at the outlet of the branch circuit corresponding to each internal machine. When the inner machine performs cooling operation, the corresponding three-way valve adjusts and distributes the refrigerant flow of the corresponding branch according to the state of the inner machine, so that the heat exchange effect of the inner machine reaches the design requirement.
When the running state is for defrosting the operation, according to the flow control valve that the running state control indoor set corresponds, include: the flow control valve is controlled to close. After controlling the flow control valve corresponding to the indoor unit according to the operation state, the method further comprises the following steps: controlling a circulating pump corresponding to the indoor unit to be started, and extracting the refrigerant reserved in the indoor unit; after all the refrigerants remained in the indoor unit are pumped out, the circulating pump is controlled to be closed, and the electric heating device in the indoor unit is controlled to be opened. When the internal machine carries out electric heating defrosting, the corresponding three-way valve carries out flow regulation distribution, so that no refrigerant flows through the corresponding branch, the circulating pump runs, the refrigerant in the internal machine is pumped out of the internal machine and then stops running, the electric heating is started to carry out defrosting mode until defrosting of the corresponding branch is finished, and the state is restored to the state when refrigerating is carried out.
In addition to the control process of the indoor units, the scheme also comprises the control of the outdoor unit, specifically, after the running states of the indoor units are detected, when the running states of all the indoor units are defrosting running, the outdoor unit is controlled to be shut down; otherwise, controlling the outdoor unit to keep running.
In a preferred embodiment 2 of the present invention, another air conditioning unit control method is further provided, and specifically, fig. 4 shows an optional flowchart of the method, and as shown in fig. 4, the method includes the following steps S401 to S413:
s401: collecting parameters by an internal machine mainboard; each internal machine mainboard acquires the operation parameters of a corresponding internal machine;
s402: collecting parameters by an external machine mainboard; meanwhile, an external unit main board acquires the operation parameters of an external unit;
s403: detecting whether a defrosting entry condition is met;
s404: if not, the corresponding internal machine keeps refrigeration operation; during the refrigeration operation, the corresponding control methods of the inner machines are the same, taking the inner machine 1 as an example, when the inner machine 1 enters a refrigeration mode, the circulating pump 1 at the branch outlet of the inner machine 1 does not operate, and the three-way valve 1 at the branch inlet corresponding to the inner machine 1 performs opening adjustment, specifically: (1) when the superheat degree of the refrigerant at the outlet of the indoor unit 1 (the superheat degree of the refrigerant at the outlet of the indoor unit) is less than a preset value, the three-way valve 1 adjusts the opening degree to reduce the flow of the refrigerant flowing to the indoor unit 1, so that the superheat degree of the refrigerant at the outlet of the indoor unit is equal to the preset value. (2) When the superheat degree of the refrigerant at the outlet of the inner machine 1 is larger than the preset value, the three-way valve 1 adjusts the opening degree to increase the flow of the refrigerant flowing to the inner machine 1, so that the actually measured superheat degree of the refrigerant at the outlet of the three-way valve is equal to the preset value. (3) When the actually measured superheat degree of the refrigerant at the outlet of the inner machine 1 is equal to a preset value, the opening degree of the three-way valve 1 is kept unchanged. The refrigeration modes of other internal machines are the same;
s405: if yes, further determining whether all the internal machines meet defrosting entry conditions;
s406: if all the internal machines meet the defrosting entry condition, the external machines stop running; when at least one internal machine operates in a refrigerating mode, the external machine continues to operate; when all the internal machines run in a defrosting mode, the external machines stop running;
s407: all the internal machines enter a defrosting mode;
s408: if all the internal machines do not meet the defrosting entry condition, the corresponding internal machines meeting the defrosting entry condition enter a defrosting mode;
s409: the corresponding inner machine three-way valve is adjusted according to the opening degree, the circulating pump runs for a period of time according to the running condition, then the operation is stopped, and the electric heating is started; the defrosting operation is carried out, each internal machine mainboard acquires state parameters of a corresponding internal machine, and defrosting action control is carried out on the internal machines meeting the defrosting condition, the control method corresponding to each internal machine is the same, taking the internal machine 1 as an example, the internal machine 1 enters a defrosting mode, the opening degree of a three-way valve 1 corresponding to a branch inlet of the internal machine 1 is adjusted, so that the refrigerant coming from the external machine does not flow through the internal machine 1, meanwhile, the refrigerant reserved in the internal machine can absorb heat generated by electric heating, the defrosting time of the internal machine is prolonged, the power consumption of defrosting is increased, a circulating pump 1 operates, the refrigerant reserved in the internal machine 1 is pumped out of the internal machine and then stops operating, and the electric heating is started to carry out the defrosting mode;
s410: detecting parameters of the defrosting internal machine; after the electric heating of the internal machine 1 is started, detecting the state parameters of the internal machine;
s411: judging whether defrosting exit conditions are met or not according to the internal machine parameters;
s412: if yes, exiting the defrosting mode, and performing refrigerating operation; when the defrosting exit condition is reached, the electric heating of the inner machine 1 is closed, and the three-way valve 1 of the inlet of the branch corresponding to the inner machine 1 recovers the action opening during the refrigerating operation. The other internal machines are in the defrosting mode and the same reason is adopted;
s413: otherwise, continuing defrosting.
In the air conditioning unit, when an internal machine performs refrigeration operation, the corresponding three-way valve adjusts and distributes the refrigerant flow of the corresponding branch according to the state of the internal machine, so that the heat exchange effect of the internal machine meets the design requirement; when the internal unit carries out electrical heating defrosting, the three-way valve that it corresponds carries out flow control distribution for it does not have the refrigerant to flow through to its branch road, and the circulating pump operation is taken out the refrigerant of internal unit the back stop motion of leaving the internal unit, and electrical heating opens and changes the mode of defrosting, and the state when resuming to the refrigeration operation is ended to the defrosting that corresponds the branch road. Through the arrangement, each branch of the air conditioning unit is balanced in shunting, the heat exchange effect of the refrigerant of each internal unit is optimal, the problems of long defrosting time and high power consumption caused by the refrigerant during electric heating defrosting are solved, and energy and power are saved.
Example 3
Based on the air conditioning unit control method provided in embodiment 2 above, there is also provided in a preferred embodiment 3 of the present invention a storage medium containing computer-executable instructions for performing the air conditioning unit control method as described above when executed by a computer processor.
In the above embodiment, a one drags many condensing units is provided, a flow control valve is respectively arranged at the inlet of the branch path corresponding to each internal unit, and the flow control valve adjusts and distributes the refrigerant flow of the corresponding branch path, so that the heat exchange effect of the internal units reaches the requirement, the problem that the refrigerant of a plurality of internal units of one drags many condensing units in the prior art is unreasonable in flow distribution is effectively solved, the refrigerant flow of each internal unit is adapted to the requirement, and the heat exchange effect of the whole machine is improved.
Other embodiments of the invention will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This application is intended to cover any variations, uses, or adaptations of the invention following, in general, the principles of the invention and including such departures from the present disclosure as come within known or customary practice within the art to which the invention pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the invention being indicated by the following claims.
It will be understood that the invention is not limited to the precise arrangements that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (13)
1. An air conditioning assembly, comprising:
an outdoor unit (1);
one end of the refrigerant branch is connected with the first connecting point, and the other end of the refrigerant branch is connected with the second connecting point; the first connecting point is positioned on a pipeline of a refrigerant outlet of the outdoor unit (1), and the second connecting point is positioned on a pipeline between the first connecting point and the refrigerant outlet of the outdoor unit (1);
the refrigerant inlet of each indoor unit (2) is connected with the refrigerant branch, and the refrigerant outlet of each indoor unit (2) is connected with the refrigerant inlet of the outdoor unit (1);
the flow regulating valve (3) is positioned at the joint of a refrigerant inlet of each indoor unit (2) and the refrigerant branch and is used for regulating the flow of the refrigerant entering the indoor units (2);
and the second check valve (6) is positioned on the refrigerant branch between the flow regulating valve (3) and the second connecting point.
2. Air conditioning unit according to claim 1, characterized in that said flow control valve (3) is a three-way valve, the inlet and the first outlet of which are connected to said refrigerant branch, the second outlet of which is connected to the refrigerant inlet of said indoor unit (2).
3. The air conditioning assembly as set forth in claim 1, further comprising:
and the circulating pump (4) is positioned between a refrigerant outlet of the indoor unit (2) and a refrigerant inlet of the outdoor unit (1) and is used for extracting the refrigerant reserved in the indoor unit (2) when the indoor unit (2) defrosts.
4. The air conditioning assembly as set forth in claim 3, further comprising:
and the first check valve (5) is positioned on a pipeline between a refrigerant outlet of the indoor unit (2) and the circulating pump (4).
5. The air conditioning assembly as set forth in claim 3, further comprising:
the indoor unit main board (7) is connected with the indoor unit (2), the flow regulating valve (3) and the circulating pump (4) and is used for collecting the operation parameters of the indoor unit (2) and controlling the operation of the indoor unit (2), the flow regulating valve (3) and the circulating pump (4);
and the outdoor unit main board (8) is connected with the outdoor unit (1) and the indoor unit main board (7) and is used for collecting the operation parameters of the outdoor unit (1), controlling the operation of the outdoor unit (1) and controlling the indoor unit main board (7).
6. Air conditioning assembly according to claim 1, characterized in that said indoor unit (2) further comprises:
and the electric heating device is used for heating and defrosting the indoor unit (2).
7. An air conditioning unit control method applied to the air conditioning unit according to any one of claims 1 to 6, characterized by comprising:
detecting the running state of the indoor unit;
and controlling a flow regulating valve corresponding to the indoor unit according to the running state so as to regulate the flow of the refrigerant entering the indoor unit.
8. The method of claim 7, wherein the operating state includes at least cooling operation; when the running state is during the cooling operation, according to the flow control valve that running state control indoor set corresponds, include:
and detecting the superheat degree of a refrigerant at the outlet of the indoor unit, and adjusting the opening of the flow regulating valve according to the superheat degree of the refrigerant.
9. The method as claimed in claim 8, wherein adjusting the opening degree of the flow rate adjustment valve according to the refrigerant superheat degree comprises:
when the superheat degree of the refrigerant is smaller than a preset value, controlling the flow regulating valve to reduce the refrigerant flow of the first branch; the first branch is a passage of the flow regulating valve to a refrigerant inlet of the indoor unit;
when the superheat degree of the refrigerant is larger than the preset value, controlling the flow regulating valve to increase the refrigerant flow of the first branch;
and when the superheat degree of the refrigerant is equal to the preset value, controlling the flow regulating valve to keep the refrigerant flow of the first branch unchanged.
10. The method according to claim 7, wherein the operating conditions further comprise at least a defrost operation; when the running state is defrosting operation, the flow regulating valve corresponding to the indoor unit is controlled according to the running state, and the method comprises the following steps:
and controlling the flow regulating valve to be closed.
11. The method of claim 10, further comprising, after controlling the corresponding flow control valve of the indoor unit according to the operation state:
controlling a circulating pump corresponding to the indoor unit to be started so as to pump out the refrigerant reserved in the indoor unit;
and after all the refrigerants reserved in the indoor unit are pumped out, controlling the circulating pump to be closed, and controlling an electric heating device in the indoor unit to be opened.
12. The method of claim 10, further comprising, after detecting the operation state of the indoor unit:
when the running states of all the indoor units are defrosting running, controlling the outdoor unit to shut down;
otherwise, controlling the outdoor unit to keep running.
13. A storage medium containing computer executable instructions for performing the air conditioning unit control method of any of claims 7 to 12 when executed by a computer processor.
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