CN117029184A - Heat pump air conditioning system, control method and control device of heat pump air conditioning system - Google Patents
Heat pump air conditioning system, control method and control device of heat pump air conditioning system Download PDFInfo
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- CN117029184A CN117029184A CN202310945832.XA CN202310945832A CN117029184A CN 117029184 A CN117029184 A CN 117029184A CN 202310945832 A CN202310945832 A CN 202310945832A CN 117029184 A CN117029184 A CN 117029184A
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- indoor
- defrosting
- air conditioning
- heat pump
- conditioning system
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- 238000004378 air conditioning Methods 0.000 title claims abstract description 83
- 238000000034 method Methods 0.000 title claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 237
- 238000010257 thawing Methods 0.000 claims abstract description 167
- 125000001153 fluoro group Chemical group F* 0.000 claims abstract description 20
- 230000002035 prolonged effect Effects 0.000 claims description 6
- 238000005336 cracking Methods 0.000 abstract description 8
- 230000001276 controlling effect Effects 0.000 description 49
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 16
- 229910052731 fluorine Inorganic materials 0.000 description 16
- 239000011737 fluorine Substances 0.000 description 16
- 238000003860 storage Methods 0.000 description 7
- 238000004891 communication Methods 0.000 description 6
- 238000004590 computer program Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 230000002441 reversible effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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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
- F24F11/42—Defrosting; Preventing freezing of outdoor 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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/52—Indication arrangements, e.g. displays
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
-
- 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
-
- 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
- F24F11/65—Electronic processing for selecting an operating mode
-
- 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
-
- 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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
- F24F3/06—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units
- F24F3/065—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the arrangements for the supply of heat-exchange fluid for the subsequent treatment of primary air in the room units with a plurality of evaporators or condensers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Signal Processing (AREA)
- Physics & Mathematics (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Human Computer Interaction (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a heat pump air conditioning system, a control method and a control device of the heat pump air conditioning system. The heat pump air conditioning system comprises a plurality of indoor units which are formed by a plurality of indoor water units and a plurality of indoor fluorine units, wherein the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel and share one outdoor unit; the method comprises the following steps: receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water capacity ratio of the total rated capacity of all indoor units in the total rated capacity of the indoor units; and generating execution logic according to the capacity ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic. According to the control method and the control device, the capacity ratio coefficient of the water machine is added to serve as the judging basis for switching the defrosting control program, and the indoor water machine is controlled to be kept in different working states in different defrosting control programs, so that thorough defrosting of the outdoor machine is realized, the risk of frost cracking of the indoor water machine can be reduced, and stable and efficient operation of the system is facilitated.
Description
Technical Field
The invention relates to the technical field of electric appliances, in particular to a heat pump air conditioning system, a control method and a control device of the heat pump air conditioning system.
Background
In the related art, the frosting of the air conditioner can increase the heat resistance of the heat exchanger, so that the heat exchange capacity of the air conditioner is reduced, and the defrosting method commonly used at present is reverse refrigeration defrosting, namely when the control module detects that the air conditioner meets the defrosting condition, the four-way valve switches the flow direction of the refrigerant, and the four-way valve is switched from a heating state to a refrigerating state, and the outdoor heat exchanger dissipates heat to defrost.
In the air conditioning system in which the fluorine machine and the water machine are mixed, water flows in the water machine pass through, and the water flows in the water machine possibly freeze under the condition of low temperature, so that the heat exchanger of the water machine is frozen, therefore, it can be understood that in a defrosting mode, if the water machine participates in a defrosting cycle, the risk of the heat exchanger in the water machine being frozen is high, but if the water machine does not participate in the defrosting cycle, namely, the electronic expansion valve is closed to enable the electronic expansion valve not to participate in the defrosting process, the evaporation capacity of the external machine is possibly insufficient, the problem of incomplete defrosting is caused, and thorough defrosting of the outdoor machine is difficult to realize.
Disclosure of Invention
The invention provides a heat pump air conditioning system, a control method and a control device of the heat pump air conditioning system, which are used for solving the defects in the prior art and realizing the following technical effects: the energy duty ratio coefficient of the water machine is added as a judging basis for switching defrosting control programs, and the indoor water machine is controlled to be kept in different working states in different defrosting control programs, so that thorough defrosting of the outdoor machine is realized, the risk of frost cracking of the heat exchanger in the indoor water machine can be reduced, and stable and efficient operation of the system is facilitated.
According to the control method of the heat pump air conditioning system, which is provided by the embodiment of the first aspect of the invention, the heat pump air conditioning system comprises a plurality of indoor units which are formed by a plurality of indoor water units and a plurality of indoor fluorine units, and the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel and share one outdoor unit;
the control method comprises the following steps:
receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water capacity ratio of the total rated capacity of all the indoor units in the total rated capacity of the indoor units;
and generating execution logic according to the capacity ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
According to one embodiment of the present invention, the step of generating execution logic according to the capacity ratio of the water machine and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic specifically includes:
and controlling the heat pump air conditioning system to execute different defrosting control programs according to the capacity ratio of the water machine, wherein the opening degree of the electronic expansion valve of each indoor water machine is different under the different defrosting control programs.
According to an embodiment of the present invention, the step of controlling the heat pump air conditioning system to execute different defrosting control programs according to the water capacity ratio specifically includes:
and controlling all the electronic expansion valves of the indoor water machines in the heat pump air conditioning system to be closed according to the water machine capacity ratio smaller than the lowest capacity ratio, and controlling the heat pump air conditioning system to enter the defrosting mode after all the actions of the electronic expansion valves are executed.
According to an embodiment of the present invention, the step of controlling the heat pump air conditioning system to execute different defrosting control programs according to the water capacity ratio specifically includes:
acquiring the water inlet temperature of each indoor water machine according to the water machine capacity ratio being greater than or equal to the minimum capacity ratio;
and controlling and adjusting the opening of the electronic expansion valve of each indoor water machine according to the water inlet temperature of each indoor water machine, and controlling the heat pump air conditioning system to enter the defrosting mode after all the actions of the electronic expansion valves are executed.
According to one embodiment of the present invention, the step of controlling and adjusting the opening of the electronic expansion valve of each indoor water machine according to the water inlet temperature of each indoor water machine specifically includes;
controlling an electronic expansion valve of the indoor water machine to be closed according to the fact that the water inlet temperature of the indoor water machine is in a first temperature interval;
controlling the opening of the electronic expansion valve of the indoor water machine to be a first opening according to the fact that the water inlet temperature of the indoor water machine is in a second temperature interval;
controlling the opening of the electronic expansion valve of the indoor water machine to be a second opening according to the fact that the water inlet temperature of the indoor water machine is in a third temperature interval;
the first temperature interval is smaller than the second temperature interval, the second temperature interval is smaller than the third temperature interval, and the first opening is smaller than the second opening.
According to an embodiment of the present invention, the step of controlling the heat pump air conditioning system to enter the defrosting mode after all actions of the electronic expansion valves are performed specifically includes:
determining that the action of the electronic expansion valve is executed;
controlling the heat pump air conditioning system to enter the defrosting mode in the original defrosting duration under the condition that the Shui Jineng force duty ratio is in a first duty ratio interval;
acquiring the total rated capacity of all the indoor units in the current working state and the working capacity ratio of the total rated capacity of all the indoor units under the condition that the Shui Jineng force ratio is in a second ratio interval, determining new defrosting duration according to the working capacity ratio, and controlling the heat pump air conditioning system to enter the defrosting mode in the new defrosting duration;
wherein the first duty cycle interval is less than the second duty cycle interval.
According to one embodiment of the present invention, the step of determining a new defrosting duration according to the duty ratio specifically includes:
determining that the new defrosting duration is zero according to the duty cycle being smaller than a first duty cycle;
determining that the new defrosting duration is kept unchanged as the original defrosting duration according to the fact that the duty ratio of the working capacity is larger than the second duty ratio;
and determining the extension time length of the new defrosting time length compared with the original defrosting time length according to the interval range where the duty ratio is located.
According to an embodiment of the present invention, the step of determining the extended duration of the new defrosting duration compared to the original defrosting duration according to the range of the interval where the duty ratio is located specifically includes:
determining that the prolonged duration is a first duration according to the duty ratio of the working capacity being in a third duty ratio interval;
determining that the prolonged duration is a second duration according to the duty ratio of the working capacity in a fourth duty ratio interval;
the third duty ratio interval and the fourth duty ratio interval are both larger than or equal to the first duty ratio and smaller than or equal to the second duty ratio, the third duty ratio interval is larger than the fourth duty ratio interval, and the first time length is smaller than the second time length.
According to an embodiment of the present invention, after the step of determining a new defrosting duration according to the duty ratio, the control method of the heat pump air conditioning system further includes:
and determining the new defrosting time length to be zero, controlling the compressor to stop and sending out an alarm by the heat pump air conditioning system.
According to the control device of the heat pump air conditioning system, the heat pump air conditioning system comprises a plurality of indoor units which are formed by a plurality of indoor water units and a plurality of indoor fluorine units, wherein the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel and share one outdoor unit;
the control device includes:
the acquisition module is used for receiving a signal for controlling the indoor unit to enter a defrosting mode and acquiring the water capacity ratio of the total rated capacity of all the indoor units in the total rated capacity of the indoor units;
and the execution module is used for generating execution logic according to the capacity ratio of the water machine and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
According to a third aspect of the present invention, a heat pump air conditioning system includes a control device of the heat pump air conditioning system according to the second aspect of the present invention, and further includes an outdoor unit and a plurality of indoor units;
the indoor units are composed of a plurality of indoor water units and a plurality of indoor fluorine units, the indoor water units and the indoor fluorine units are connected in parallel and share an outdoor unit, and each indoor unit is correspondingly provided with an electronic expansion valve.
According to the control method of the heat pump air conditioning system, the capacity ratio coefficient of the water machine is added to serve as the judging basis for switching defrosting control programs, and the indoor water machine is controlled to be kept in different working states in different defrosting control programs, so that the capacity of the indoor machine which is started currently is guaranteed to meet the defrosting requirement of the outdoor machine, thorough defrosting of the outdoor machine is achieved, the risk of frost cracking of the heat exchanger in the indoor water machine can be reduced, and stable and efficient operation of the system is facilitated.
Drawings
In order to more clearly illustrate the invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the invention, and other drawings can be obtained according to the drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic flow chart of a control method of a heat pump air conditioning system provided by the invention;
fig. 2 is a schematic structural diagram of a control device of the heat pump air conditioning system provided by the invention;
fig. 3 is a schematic structural diagram of an electronic device provided by the present invention.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The control method and control device of the heat pump air conditioning system and the heat pump air conditioning system provided by the invention are described below with reference to the accompanying drawings. Before the embodiments of the present invention are described in detail, the entire application scenario is described. The control method, the control device, the electronic equipment and the computer readable storage medium of the heat pump air conditioning system can be applied to the local air conditioner, cloud platforms in the Internet field, cloud platforms in other kinds of Internet fields or third party equipment. The third party device may include a mobile phone, a tablet computer, a notebook computer, a vehicle-mounted computer, and other intelligent terminals.
In the following, a control method applicable to a heat pump air conditioning system is only described as an example, and it should be understood that the control method according to the embodiment of the present invention may also be applicable to a cloud platform and a third party device.
It should be noted that the control method of the present invention is based on the following heat pump air conditioning system, specifically, the heat pump air conditioning system includes a plurality of indoor units and an outdoor unit, each indoor unit is correspondingly provided with an electronic expansion valve, the plurality of indoor units are composed of a plurality of indoor water units and a plurality of indoor fluorine units, and the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel and share one outdoor unit. The indoor fluorine machine is used for realizing indoor temperature adjustment, and the indoor water machine is used for realizing hot water or cold water production.
As shown in fig. 1, a control method of a heat pump air conditioning system according to an embodiment of a first aspect of the present invention includes:
step S1, receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water machine capacity ratio of the total rated capacity of all indoor units in the total rated capacity of the indoor units;
and S2, generating execution logic according to the energy duty ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
In the related art, the frosting of the air conditioner can increase the heat resistance of the heat exchanger, so that the heat exchange capacity of the air conditioner is reduced, and the defrosting method commonly used at present is reverse refrigeration defrosting, namely when the control module detects that the air conditioner meets the defrosting condition, the four-way valve switches the flow direction of the refrigerant, and the four-way valve is switched from a heating state to a refrigerating state, and the outdoor heat exchanger dissipates heat to defrost.
In the air conditioning system in which the fluorine machine and the water machine are mixed, water flows in the water machine pass through, and the water flows in the water machine possibly freeze under the condition of low temperature, so that the heat exchanger of the water machine is frozen, therefore, it can be understood that in a defrosting mode, if the water machine participates in a defrosting cycle, the risk of the heat exchanger in the water machine being frozen is high, but if the water machine does not participate in the defrosting cycle, namely, the electronic expansion valve is closed to enable the electronic expansion valve not to participate in the defrosting process, the evaporation capacity of the external machine is possibly insufficient, the problem of incomplete defrosting is caused, and thorough defrosting of the outdoor machine is difficult to realize.
In order to solve the technical defects in the related art, the invention provides a control method, which is used for switching different defrosting control methods according to the capacity ratio coefficient of the water machine and adjusting the working state of the indoor water machine so as to thoroughly defrost the air conditioner.
Further, the specific working principle and working process of the control method of the heat pump air conditioning system provided by the invention are as follows: firstly, after the controller receives a signal for controlling the heat pump air conditioning system to enter a defrosting mode, the system does not enter the defrosting mode immediately, the controller firstly performs defrosting pre-preparation before the control system enters the defrosting mode, namely, the controller acquires the water machine capacity ratio and determines the working state of each indoor water machine, which is to be located in the defrosting mode, according to the water machine capacity ratio, so that each indoor water machine is controlled according to the working state after entering the defrosting mode.
It will be understood that the above water machine capacity ratio refers to the capacity ratio of the total rated capacity of all indoor water machines in the total rated capacity of all indoor water machines, where all indoor water machines refer to all indoor water machines connected to the outdoor machine that needs to be defrosted in the heat pump air conditioning system, all indoor machines refer to indoor machines connected to the outdoor machine that needs to be defrosted in the heat pump air conditioning system, and all indoor machines include all indoor water machines and all indoor fluorine machines at the same time.
Further, in the step S2, the working state of the indoor water machine includes an on state or an off state, that is, the controller in the step S2 determines the working state of each indoor water machine at the position corresponding to the position before and after entering the defrosting mode according to the water machine capacity ratio, and enters the defrosting mode according to the working state, so that the capacity of the indoor machine which is currently opened can be ensured to meet the defrosting requirement of the outdoor machine, thereby realizing thorough defrosting of the outdoor machine, and reducing the risk of frost cracking of the heat exchanger in the indoor water machine.
It can be understood that the capacity of the water machine can reflect the total capacity of the indoor water machine in all indoor machines, and when the capacity of the water machine is lower, the current indoor fluorine machine is higher in capacity, and at the moment, thorough defrosting of the air conditioner can be realized by only starting the indoor fluorine machine to participate in defrosting circulation, so that the indoor water machine can be controlled to be completely closed, and the risk of frost cracking of the heat exchanger in the indoor water machine is thoroughly avoided.
When the capacity of the water machine is higher, the current capacity of the indoor fluorine machine is lower, and the defrosting requirement of the air conditioner cannot be met by only starting the indoor fluorine machine at the moment, so that a small part of indoor water machines can be controlled to be started, namely, all the indoor fluorine machines and the small part of indoor water machines are controlled to participate in the defrosting cycle, the current defrosting requirement of the air conditioner is met, the thorough defrosting of the air conditioner is realized, and the risk that the heat exchanger in the indoor water machine is frosted can be reduced.
When the water machine occupation ratio is too high, the current indoor fluorine machine capability occupation ratio is low, and at the moment, most indoor water machines can be controlled to be started, namely all indoor fluorine machines and most indoor water machines are controlled to participate in defrosting circulation, so that the current defrosting requirement of an air conditioner is met, and thorough defrosting of the air conditioner is realized.
In summary, according to the control method of the heat pump air conditioning system provided by the embodiment of the invention, the capacity ratio coefficient of the water machine is added as the judging basis for switching the defrosting control program, and the indoor water machine is controlled to be kept in different working states in different defrosting control programs, so that the capacity of the indoor machine which is started currently is ensured to meet the defrosting requirement of the outdoor machine, the thorough defrosting of the outdoor machine is realized, the risk of frost cracking of the heat exchanger in the indoor water machine can be reduced, and the stable and efficient operation of the system is facilitated.
According to some embodiments of the present invention, the step of generating execution logic according to the capacity ratio of the water machine and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic specifically includes:
and controlling the heat pump air conditioning system to execute different defrosting control programs according to the water machine capacity ratio, wherein the opening degree of the electronic expansion valve of each indoor water machine is different under the different defrosting control programs.
In this embodiment, the controller controls the opening of the electronic expansion valve of each indoor water machine to control the working state of each indoor water machine, and it can be understood that in different defrosting control programs, each indoor water machine generally has three working states and includes a full opening, a closed state and a partial opening respectively, and the three working states respectively correspond to the three actions of the full opening, the full closing and the partial opening of the electronic expansion valve.
According to some embodiments of the present invention, the step of controlling the heat pump air conditioning system to execute different defrosting control programs according to the water capacity ratio specifically includes:
and controlling the electronic expansion valves of all indoor water machines in the heat pump air conditioning system to be closed according to the water machine capacity ratio smaller than the minimum capacity ratio, and controlling the heat pump air conditioning system to enter a defrosting mode after the actions of all the electronic expansion valves are executed.
In this embodiment, when the capacity ratio of the water machine is smaller than the minimum capacity ratio, it is indicated that the capacity ratio of the water machine is smaller, and at this time, the system can completely defrost the air conditioner by only turning on the indoor fluorine machine, so in order to avoid frost cracking of the indoor heat exchangers of the indoor water machine, the controller will control the electronic expansion valves of all indoor water machines to be closed, and maintain the above state to enter the defrost mode.
For example, the minimum capacity ratio may be 30%, i.e., when the water capacity ratio is less than 30%, all electronic expansion valves of the indoor water machine are closed.
According to another embodiment of the present invention, the step of controlling the heat pump air conditioning system to execute different defrosting control programs according to the capacity ratio of the water machine specifically includes:
acquiring the water inlet temperature of each indoor water machine according to the water machine capacity ratio being greater than or equal to the lowest capacity ratio;
and controlling and adjusting the opening of the electronic expansion valve of each indoor water machine according to the water inlet temperature of each indoor water machine, and controlling the heat pump air conditioning system to enter a defrosting mode after the actions of all the electronic expansion valves are executed.
In this embodiment, when the capacity ratio of the water machine is equal to or greater than the minimum capacity ratio, it is indicated that the capacity ratio of the water machine is relatively large, and at this time, if the system only turns on the indoor fluorine machine, the outdoor machine cannot implement complete defrosting, so the system needs to turn on a part of the indoor water machines to participate in the defrosting cycle to meet the defrosting requirement of the outdoor machine, and because the indoor water machines have frost crack risks when the water inlet temperature is too low, the controller will acquire the water inlet temperature of each indoor water machine and judge one by one, and only the indoor water machine with the water inlet temperature meeting the set requirement can be turned on and participate in the defrosting cycle, thereby avoiding frost crack of a part of the indoor water machines due to the too low water inlet temperature.
Therefore, on one hand, thorough defrosting of the outdoor unit is guaranteed, and on the other hand, the risk of frost cracking of the indoor water unit can be reduced to the minimum, so that stable and efficient operation of the system is guaranteed.
Further, according to the water inlet temperature of each indoor water machine, controlling and adjusting the opening degree of the electronic expansion valve of each indoor water machine, wherein the method specifically comprises the following steps;
according to the fact that the water inlet temperature of the indoor water machine is in a first temperature interval, the electronic expansion valve of the indoor water machine is controlled to be closed;
controlling the opening of the electronic expansion valve of the indoor water machine to be a first opening according to the fact that the water inlet temperature of the indoor water machine is in a second temperature interval;
controlling the opening of the electronic expansion valve of the indoor water machine to be a second opening according to the fact that the water inlet temperature of the indoor water machine is in a third temperature interval;
the first temperature interval is smaller than the second temperature interval, the second temperature interval is smaller than the third temperature interval, and the first opening is smaller than the second opening.
For example, when the temperature of the inlet water is lower than 10 ℃, the temperature of the water is too low, and the heat exchanger of the indoor water machine is very likely to be frozen and cracked, so that the electronic expansion valve of the indoor water machine is closed; when the temperature of the inlet water is more than or equal to 10 ℃ and less than or equal to 20 ℃, controlling the opening of an electronic expansion valve of the indoor water machine to be 100 steps; when the temperature of the inlet water is higher than 20 ℃, controlling the opening of the electronic expansion valve of the indoor water machine to be 150 steps.
Of course, the above-described embodiment is only one of many embodiments of the present invention, and does not constitute a specific limitation of the present invention.
Further, the step of controlling the heat pump air conditioning system to enter the defrosting mode after the actions of all the electronic expansion valves are executed specifically includes:
determining that the action of the electronic expansion valve is finished;
controlling the heat pump air conditioning system to enter a defrosting mode in the original defrosting time under the condition that the capacity duty ratio of the water machine is in a first duty ratio interval;
under the condition that the water machine capacity ratio is in a second ratio interval, acquiring the total rated capacity of all the indoor units in the current working state and the working capacity ratio of the total rated capacity of all the indoor units, determining new defrosting duration according to the working capacity ratio, and controlling the heat pump air conditioning system to enter a defrosting mode in the new defrosting duration;
wherein the first duty cycle interval is less than the second duty cycle interval.
In this embodiment, when the capacity ratio of the water machine is in the first duty ratio range, for example, in the range of 30% to 60%, although a part of indoor water machines are turned off due to too low water inlet temperature, the remaining opened indoor water machines and all opened indoor fluorine machines can meet all defrosting requirements of the air conditioner, so that the original defrosting duration can be kept unchanged in the defrosting process.
When the water machine capacity ratio is in the second higher ratio interval, for example, in the range of 60% to 100%, because the indoor water machine capacity ratio is too high, when part of indoor water machines are turned off due to too low water inlet temperature, the residual indoor machines (including the opened indoor water machines and all indoor fluorine machines) which are working may not meet the defrosting requirement of the air conditioner, so the controller needs to further judge the size of the working capacity ratio, that is, the ratio of the residual capacity of the indoor machines which are working in the total capacity of all indoor machines, and determine whether to prolong the defrosting time according to the size of the working capacity ratio, thereby meeting the requirement of thoroughly defrosting the air conditioner.
Further, when the water capacity duty ratio is in the second duty ratio interval, determining a new defrosting duration according to the working capacity duty ratio specifically includes:
determining that the new defrosting duration is zero according to the duty cycle being smaller than the first duty cycle;
determining that the new defrosting duration is kept unchanged as the original defrosting duration according to the fact that the duty ratio of the working capacity is larger than the second duty ratio;
and determining the extension time length of the new defrosting time length compared with the original defrosting time length according to the interval range where the duty ratio is located.
It can be understood that when the duty ratio is smaller than the first duty ratio, it indicates that the total capacity of the indoor unit that can be turned on at present is too low to satisfy the defrosting of the outdoor unit, so that the system is stopped, that is, the new defrosting duration is zero; when the duty ratio is larger than the second duty ratio, the total capacity of the indoor unit which can be started at present can be used for defrosting the outdoor unit, so that the defrosting duration can be kept unchanged; and when the duty ratio is greater than or equal to the first duty ratio and less than or equal to the second duty ratio, it is proved that the total capacity of the indoor unit which can be started currently cannot meet the requirement of defrosting the outdoor unit, so that the defrosting time is required to be prolonged to compensate the defrosting process, and thorough defrosting of the outdoor unit is achieved.
Further, the step of determining an extended period of time of the new defrosting time period compared with the original defrosting time period according to the range of the section where the duty ratio is located specifically includes:
determining that the extension time length is the first time length according to the working capacity duty ratio in the third duty ratio interval;
and determining the extension time period as the second time period according to the working capacity duty ratio in the fourth duty ratio interval.
The third duty ratio interval and the fourth duty ratio interval are both larger than or equal to the first duty ratio and smaller than or equal to the second duty ratio, the third duty ratio interval is larger than the fourth duty ratio interval, and the first duration is smaller than the second duration.
It will be appreciated that in this embodiment, the lower the duty ratio, the lower the extension period, that is, the range from the first duty ratio to the second duty ratio, the extension period and the duty ratio have a positive correlation.
Further, after the step of determining a new defrosting duration according to the duty ratio, the control method further includes:
and determining that the new defrosting time is zero, controlling the compressor to stop and sending out an alarm by the heat pump air conditioning system.
For example, when the water capacity ratio is in the range of 60% to 100%, each indoor water machine executes a water inlet temperature detection program respectively, only the indoor water machine with water inlet temperature not lower than 10 ℃ is started and participates in a defrosting cycle, the ratio (namely, working capacity ratio) of the total indoor water machine capacity of the current openable PMV (namely, the electronic expansion valve) and the total indoor fluorine machine capacity is calculated, and when the working capacity ratio is in the range of 80% to 100%, the system directly enters a defrosting mode without prolonging defrosting duration; when the duty ratio is in the range of 50% to 80%, the system enters a defrost mode and the defrost period is prolonged by 2 minutes from the original defrost period; when the duty ratio is in the range of 30% to 50%, the system enters a defrost mode and the defrost period is extended by 5 minutes from the original defrost period; when the duty cycle is in the range of 0% to 30%, the system is not allowed to enter defrost mode, the system alarms and the compressor is shut down.
The control device of the heat pump air conditioning system provided by the invention is described below, and the control device of the heat pump air conditioning system described below and the control method of the heat pump air conditioning system described above can be referred to correspondingly.
As shown in fig. 2, a control device of a heat pump air conditioning system according to a second aspect of the present invention includes a plurality of indoor units formed by a plurality of indoor water units and a plurality of indoor fluorine units, the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel to each other and share one outdoor unit, the control device includes:
an obtaining module 110, configured to obtain a water capacity ratio of a total rated capacity of all indoor water machines in a total rated capacity of the indoor machines, when receiving a signal for controlling to enter a defrosting mode;
the execution module 120 is configured to generate execution logic according to the water machine capacity ratio, and control and adjust the working state of the indoor water machine in the defrosting mode according to the execution logic.
According to the heat pump air conditioning system, the control device of the heat pump air conditioning system further comprises an outdoor unit and a plurality of indoor units.
The indoor units are composed of a plurality of indoor water units and a plurality of indoor fluorine units, the indoor water units and the indoor fluorine units are connected in parallel and share an outdoor unit, and each indoor unit is correspondingly provided with an electronic expansion valve.
According to the heat pump air conditioning system and the control device thereof provided by the embodiment of the invention, the water machine capacity duty ratio coefficient is added as a judging basis for switching the defrosting control method: and the opening degree and defrosting time of the electronic expansion valve are regulated by combining the water temperature monitoring result, so that the aim of defrosting is fulfilled, and the stable and efficient operation of the system is facilitated.
Fig. 3 illustrates a physical schematic diagram of an electronic device, as shown in fig. 3, where the electronic device may include: processor 810, communication interface (Communications Interface) 820, memory 830, and communication bus 840, wherein processor 810, communication interface 820, memory 830 accomplish communication with each other through communication bus 840. The processor 810 may invoke logic instructions in the memory 830 to perform a method of controlling a heat pump air conditioning system, the method comprising: receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water capacity ratio of the total rated capacity of all indoor units in the total rated capacity of the indoor units; and generating execution logic according to the capacity ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
Further, the logic instructions in the memory 830 described above may be implemented in the form of software functional units and may be stored in a computer-readable storage medium when sold or used as a stand-alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method of the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
In another aspect, the present invention also provides a computer program product, the computer program product comprising a computer program, the computer program being storable on a non-transitory computer readable storage medium, the computer program, when executed by a processor, being capable of executing a method of controlling a heat pump air conditioning system, the method comprising: receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water capacity ratio of the total rated capacity of all indoor units in the total rated capacity of the indoor units; and generating execution logic according to the capacity ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
In yet another aspect, the present invention also provides a non-transitory computer readable storage medium having stored thereon a computer program which when executed by a processor is implemented to perform a control method of a heat pump air conditioning system, the method comprising: receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water capacity ratio of the total rated capacity of all indoor units in the total rated capacity of the indoor units; and generating execution logic according to the capacity ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
The apparatus embodiments described above are merely illustrative, wherein elements illustrated as separate elements may or may not be physically separate, and elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on such understanding, the foregoing technical solutions may be embodied essentially or in part in the form of a software product, which may be stored in a computer-readable storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions to cause a computer device (which may be a personal computer, a server, or a network device, etc.) to perform the various embodiments or methods of some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (11)
1. The control method of the heat pump air conditioning system is characterized in that the heat pump air conditioning system comprises a plurality of indoor units which are formed by a plurality of indoor water units and a plurality of indoor fluorine units, and the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel and share one outdoor unit;
the control method comprises the following steps:
receiving a signal for controlling the indoor unit to enter a defrosting mode, and acquiring the water capacity ratio of the total rated capacity of all the indoor units in the total rated capacity of the indoor units;
and generating execution logic according to the capacity ratio of the water machine, and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
2. The method according to claim 1, wherein the step of generating execution logic according to the water machine capacity ratio and controlling and adjusting the operating state of the indoor water machine in the defrosting mode according to the execution logic specifically comprises:
and controlling the heat pump air conditioning system to execute different defrosting control programs according to the capacity ratio of the water machine, wherein the opening degree of the electronic expansion valve of each indoor water machine is different under the different defrosting control programs.
3. The method for controlling a heat pump air conditioning system according to claim 2, wherein the step of controlling the heat pump air conditioning system to execute different defrosting control programs according to the size of the water capacity ratio specifically comprises:
and controlling all the electronic expansion valves of the indoor water machines in the heat pump air conditioning system to be closed according to the water machine capacity ratio smaller than the lowest capacity ratio, and controlling the heat pump air conditioning system to enter the defrosting mode after all the actions of the electronic expansion valves are executed.
4. The method for controlling a heat pump air conditioning system according to claim 2, wherein the step of controlling the heat pump air conditioning system to execute different defrosting control programs according to the size of the water capacity ratio specifically comprises:
acquiring the water inlet temperature of each indoor water machine according to the water machine capacity ratio being greater than or equal to the minimum capacity ratio;
and controlling and adjusting the opening of the electronic expansion valve of each indoor water machine according to the water inlet temperature of each indoor water machine, and controlling the heat pump air conditioning system to enter the defrosting mode after all the actions of the electronic expansion valves are executed.
5. The method according to claim 4, wherein the step of controlling and adjusting the opening degree of the electronic expansion valve of each indoor unit according to the water inlet temperature of each indoor unit comprises;
controlling an electronic expansion valve of the indoor water machine to be closed according to the fact that the water inlet temperature of the indoor water machine is in a first temperature interval;
controlling the opening of the electronic expansion valve of the indoor water machine to be a first opening according to the fact that the water inlet temperature of the indoor water machine is in a second temperature interval;
controlling the opening of the electronic expansion valve of the indoor water machine to be a second opening according to the fact that the water inlet temperature of the indoor water machine is in a third temperature interval;
the first temperature interval is smaller than the second temperature interval, the second temperature interval is smaller than the third temperature interval, and the first opening is smaller than the second opening.
6. The method according to claim 4 or 5, wherein the step of controlling the heat pump air conditioning system to enter the defrosting mode after all the actions of the electronic expansion valves are performed, specifically comprises:
determining that the action of the electronic expansion valve is executed;
controlling the heat pump air conditioning system to enter the defrosting mode in the original defrosting duration under the condition that the Shui Jineng force duty ratio is in a first duty ratio interval;
acquiring the total rated capacity of all the indoor units in the current working state and the working capacity ratio of the total rated capacity of all the indoor units under the condition that the Shui Jineng force ratio is in a second ratio interval, determining new defrosting duration according to the working capacity ratio, and controlling the heat pump air conditioning system to enter the defrosting mode in the new defrosting duration;
wherein the first duty cycle interval is less than the second duty cycle interval.
7. The method of claim 6, wherein the step of determining a new defrosting time period according to the duty ratio comprises:
determining that the new defrosting duration is zero according to the duty cycle being smaller than a first duty cycle;
determining that the new defrosting duration is kept unchanged as the original defrosting duration according to the fact that the duty ratio of the working capacity is larger than the second duty ratio;
and determining the extension time length of the new defrosting time length compared with the original defrosting time length according to the interval range where the duty ratio is located.
8. The method according to claim 7, wherein the step of determining the extended time period of the new defrosting time period compared to the original defrosting time period according to the range of the interval in which the duty ratio is located, specifically comprises:
determining that the prolonged duration is a first duration according to the duty ratio of the working capacity being in a third duty ratio interval;
determining that the prolonged duration is a second duration according to the duty ratio of the working capacity in a fourth duty ratio interval;
the third duty ratio interval and the fourth duty ratio interval are both larger than or equal to the first duty ratio and smaller than or equal to the second duty ratio, the third duty ratio interval is larger than the fourth duty ratio interval, and the first time length is smaller than the second time length.
9. The method of controlling a heat pump air conditioning system according to claim 7, further comprising, after the step of determining a new defrosting duration based on the duty ratio:
and determining the new defrosting time length to be zero, controlling the compressor to stop and sending out an alarm by the heat pump air conditioning system.
10. The control device of the heat pump air conditioning system is characterized by comprising a plurality of indoor units which are formed by a plurality of indoor water units and a plurality of indoor fluorine units, wherein the plurality of indoor water units and the plurality of indoor fluorine units are connected in parallel and share one outdoor unit;
the control device includes:
the acquisition module is used for receiving a signal for controlling the indoor unit to enter a defrosting mode and acquiring the water capacity ratio of the total rated capacity of all the indoor units in the total rated capacity of the indoor units;
and the execution module is used for generating execution logic according to the capacity ratio of the water machine and controlling and adjusting the working state of the indoor water machine in the defrosting mode according to the execution logic.
11. A heat pump air conditioning system, characterized by comprising the control device of the heat pump air conditioning system according to claim 10, further comprising an outdoor unit and a plurality of indoor units;
the indoor units are composed of a plurality of indoor water units and a plurality of indoor fluorine units, the indoor water units and the indoor fluorine units are connected in parallel and share an outdoor unit, and each indoor unit is correspondingly provided with an electronic expansion valve.
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