CN110454950B - Air conditioning system and control method thereof - Google Patents

Air conditioning system and control method thereof Download PDF

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Publication number
CN110454950B
CN110454950B CN201910716029.2A CN201910716029A CN110454950B CN 110454950 B CN110454950 B CN 110454950B CN 201910716029 A CN201910716029 A CN 201910716029A CN 110454950 B CN110454950 B CN 110454950B
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China
Prior art keywords
compressor
temperature
conditioning system
air conditioning
rotating speed
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CN201910716029.2A
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Chinese (zh)
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CN110454950A (en
Inventor
王侃
吴楠
李丰
杜顺开
陈枫
单方坚
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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Midea Group Co Ltd
GD Midea Air Conditioning Equipment Co Ltd
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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
    • 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
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • 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
    • F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
    • F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans

Abstract

The invention provides an air conditioning system and a control method thereof, wherein the method comprises the following steps: after the air conditioning system is determined to enter a quick cooling mode or a quick heating mode, acquiring a current temperature parameter of a compressor of the air conditioning system; according to the current temperature parameter of the compressor, the operation frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased, so that the air volume and the air speed passing through the outdoor heat exchanger can be increased, the energy margin of the compressor is utilized as much as possible, the air conditioner is enabled to be operated in a rapid cooling or heating mode, and the temporary high-capacity output requirement is met.

Description

Air conditioning system and control method thereof
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air conditioning system and a control method thereof.
Background
On the premise of determining the number of air conditioners, the air conditioning system may have problems of slow indoor temperature change, insufficient cooling capacity and the like in the process of adjusting the temperature of a slightly large space.
Disclosure of Invention
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, a first objective of the present invention is to provide a control method for an air conditioning system, which can enable an air conditioner to perform a fast cooling or heating operation to meet a temporary high-capacity output requirement.
A second object of the present invention is to provide an air conditioning system.
A third object of the invention is to propose a computer-readable storage medium.
In order to achieve the above object, an embodiment of a first aspect of the present invention provides a control method for an air conditioning system, including the following steps: after the air conditioning system is determined to enter a quick cooling mode or a quick heating mode, acquiring a current temperature parameter of a compressor of the air conditioning system; and according to the current temperature parameter of the compressor, the running frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased.
According to the control method of the air conditioning system provided by the embodiment of the invention, after the air conditioning system enters the rapid cooling mode or the rapid heating mode, the operation frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased according to the current temperature parameter of the compressor, so that the air volume and the air speed passing through the outdoor heat exchanger are increased, the energy margin of the compressor is utilized as much as possible, the air conditioning is enabled to operate in rapid cooling or heating, and the temporary high-capacity output requirement is met.
According to an embodiment of the present invention, when the air conditioning system is in the rapid cooling mode, the increasing the operating frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan according to the current temperature parameter of the compressor includes: and according to the current exhaust temperature of the compressor, increasing the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan.
According to an embodiment of the present invention, the increasing the operating frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan according to the current discharge temperature of the compressor includes: before the rotating speed of the outdoor fan is increased every time, whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not is judged; if the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to the first threshold value, increasing the running frequency of the compressor; and if the temperature difference value between the limit value of the exhaust temperature of the compressor and the current exhaust temperature of the compressor is smaller than the first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, increasing the rotating speed of the outdoor fan.
According to an embodiment of the present invention, when the air conditioning system is in a fast heating mode, the increasing the operating frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan according to the current temperature parameter of the compressor includes: and according to the current exhaust temperature of the compressor and the current suction temperature of the compressor, increasing the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan.
According to an embodiment of the present invention, the increasing the operation frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan according to the current discharge temperature of the compressor and the current suction temperature of the compressor includes: before the rotating speed of the outdoor fan is increased every time, whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not and whether the temperature difference value between the current suction temperature of the compressor and the suction temperature limit value of the compressor is larger than or equal to a second threshold value or not are judged; increasing an operating frequency of the compressor if a temperature difference between a discharge temperature limit of the compressor and a current discharge temperature of the compressor is greater than or equal to a first threshold and a temperature difference between a current suction temperature of the compressor and a suction temperature limit of the compressor is greater than or equal to a second threshold; and if the temperature difference between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is smaller than a first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, or the temperature difference between the current suction temperature of the compressor and the suction temperature limit value of the compressor is smaller than a second threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, increasing the rotating speed of the outdoor fan.
According to an embodiment of the present invention, when the rotation speed of the outdoor fan is increased to the maximum rotation speed, the rotation speed of the outdoor fan and the operation frequency of the compressor are maintained to be constant.
According to an embodiment of the present invention, before increasing the operating frequency of the compressor of the air conditioning system and the rotational speed of the outdoor fan according to the current temperature parameter of the compressor, the method further includes: and increasing the rotating speed of the outdoor fan to a target rotating speed.
According to an embodiment of the present invention, before increasing the operating frequency of the compressor of the air conditioning system and the rotational speed of the outdoor fan according to the current temperature parameter of the compressor, the method further includes: and increasing the rotating speed of the indoor fan to the maximum rotating speed.
According to an embodiment of the present invention, the outdoor fan has a plurality of wind wheels, and the increasing the rotation speed of the outdoor fan includes: sequentially increasing the rotating speeds of the plurality of wind wheels according to a preset priority, wherein the rotating speed of one wind wheel in the plurality of wind wheels is increased each time; or, simultaneously increasing the rotational speed of the plurality of wind wheels.
According to one embodiment of the invention, when the rotation speeds of the plurality of wind wheels are sequentially increased according to the preset priority, the rotation speed of the wind wheel with the current priority is increased to the rotation speed of the wind wheel with the previous priority each time.
According to an embodiment of the present invention, the control method of the air conditioning system further includes: controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to an instruction input by a user; or controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to the outdoor environment temperature, the indoor set temperature and the current exhaust temperature of the compressor of the air conditioning system.
According to an embodiment of the present invention, the controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to an outdoor ambient temperature, an indoor set temperature, and a current discharge temperature of a compressor of the air conditioning system includes: when the temperature difference between the indoor environment temperature and the indoor set temperature is greater than or equal to a first temperature threshold, the outdoor environment temperature is less than or equal to a second temperature threshold, and the current exhaust temperature of the compressor is less than or equal to a third temperature threshold, controlling the air conditioning system to enter the rapid cooling mode; and when the temperature difference between the indoor environment temperature and the indoor set temperature is smaller than or equal to a first temperature threshold, the outdoor environment temperature is larger than or equal to a second temperature threshold, and the current exhaust temperature of the compressor is smaller than or equal to a third temperature threshold, controlling the air conditioning system to enter the rapid heating mode.
In order to achieve the above object, an embodiment of a second aspect of the present invention provides an air conditioning system, including: an outdoor fan; a compressor; the control device is connected with the outdoor fan and the compressor, and is used for obtaining the current temperature parameter of the compressor after determining that the air conditioning system enters a quick refrigeration mode or a quick heating mode, and increasing the running frequency of the compressor and the rotating speed of the outdoor fan according to the current temperature parameter of the compressor.
According to the air conditioning system provided by the embodiment of the invention, after the air conditioning system enters the rapid cooling mode or the rapid heating mode, the control device increases the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan according to the current temperature parameter of the compressor, so that the air quantity and the air speed passing through the outdoor heat exchanger are increased, the energy margin of the compressor is utilized as much as possible, the air conditioning system is enabled to operate in rapid cooling or heating, and the temporary high-capacity output requirement is met.
In order to achieve the above object, a readable storage medium is provided according to a third aspect of the present invention, on which a control program of an air conditioning system is stored, and when the control program of the air conditioning system is executed by a processor, the control method of the air conditioning system according to the foregoing embodiment is implemented.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a flowchart illustrating a control method of an air conditioning system according to an embodiment of the present invention;
fig. 2 is a flowchart illustrating a rapid cooling control method of an air conditioning system according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for controlling rapid cooling of an air conditioning system according to an embodiment of the present invention;
fig. 4 is a flowchart illustrating a method for controlling rapid heating of an air conditioning system according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a method for controlling rapid heating of an air conditioning system according to an embodiment of the present invention; and
fig. 6 is a block schematic diagram of an air conditioning system according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
An air conditioning system and a control method of the air conditioning system according to an embodiment of the present invention are described below with reference to the accompanying drawings.
Fig. 1 is a flowchart illustrating a control method of an air conditioning system according to an embodiment of the present invention. The air conditioning system comprises an indoor unit and an outdoor unit, wherein the outdoor unit comprises an outdoor heat exchanger, an outdoor fan and a compressor, the indoor unit comprises an indoor heat exchanger and an indoor fan, the outdoor fan can be a counter-rotating fan, the counter-rotating fan can comprise two-stage wind wheels, or can comprise three-stage or more than three-stage wind wheels.
Therefore, the counter-rotating fan adopts the multi-stage wind wheels, so that the air volume and the air speed of the outdoor heat exchanger can be obviously improved.
According to the embodiment of fig. 1, the control method of the air conditioning system includes the steps of:
s1: after the air conditioning system is determined to enter a quick cooling mode or a quick heating mode, the current temperature parameter of a compressor of the air conditioning system is obtained.
It is understood that when it is determined that the air conditioning system enters the rapid cooling mode or the rapid heating mode, the state of the air conditioning system may be recorded, for example, the initial rotation speed Fr of the compressor, the initial opening Lr of the throttling device, the initial rotation speed of the outdoor fan, for example, the initial rotation speed n01 of the primary wind wheel of the outdoor fan in the air conditioning system, and the initial rotation speed n02 of the secondary wind wheel.
The current temperature parameter of the compressor can be the current exhaust temperature of the compressor, the current exhaust temperature can be the temperature acquired in real time through an exhaust temperature sensor arranged on an exhaust pipe of the compressor, the current temperature parameter of the compressor can also be the current suction temperature of the compressor, and the current suction temperature can be the temperature acquired in real time through a suction temperature sensor arranged on a suction pipe of the compressor.
According to an embodiment of the present invention, the control method of the air conditioning system further includes:
controlling the air conditioning system to enter a rapid cooling mode or a rapid heating mode according to an instruction input by a user;
or controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to the outdoor ambient temperature, the indoor set temperature and the current exhaust temperature of the compressor of the air conditioning system.
Specifically, controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to the outdoor ambient temperature, the indoor set temperature, and the current discharge temperature of the compressor of the air conditioning system includes:
when the temperature difference between the indoor environment temperature and the indoor set temperature is greater than or equal to a first temperature threshold, the outdoor environment temperature is less than or equal to a second temperature threshold, and the current exhaust temperature of the compressor is less than or equal to a third temperature threshold, controlling the air-conditioning system to enter a rapid refrigeration mode;
and when the temperature difference between the indoor environment temperature and the indoor set temperature is smaller than or equal to a first temperature threshold, the outdoor environment temperature is larger than or equal to a second temperature threshold, and the current exhaust temperature of the compressor is smaller than or equal to a third temperature threshold, controlling the air conditioning system to enter a quick heating mode.
That is, during the cooling operation of the air conditioner, the air conditioning system is controlled to enter the rapid cooling mode when at least one of the following conditions is satisfied.
1) After receiving the indoor set temperature set by the user, determining that T1-Tt is more than or equal to Tx1, T4 is more than or equal to Tx2, and Tp is more than or equal to Tx3, wherein T1 is the indoor ambient temperature, Tt is the indoor set temperature, T4 is the outdoor ambient temperature, Tp is the exhaust temperature of the compressor, Tx1 is a first temperature threshold, Tx2 is a second temperature threshold, and Tx3 is a third temperature threshold.
The normal operation of the air conditioner can be protected by judging that T4 is less than or equal to Tx2 and Tp is less than or equal to Tx 3.
2) And receiving a quick refrigeration instruction selected by a user, wherein the user can input the quick refrigeration instruction by selecting a quick refrigeration key.
For example, when the air conditioning system performs cooling operation, a user can select a rapid cooling key through a control terminal, such as an air conditioning remote controller, the control terminal sends a command for selecting rapid cooling input by the user to the control device, and the control device can control the air conditioning system to enter a rapid cooling mode according to the received command. Or, when the air conditioning system carries out cooling operation, if the indoor set temperature Tt is set, and T1-Tt is detected to be more than or equal to Tx1, T4 is more than or equal to Tx2, and Tp is more than or equal to Tx3, the rapid cooling mode is directly entered.
Similarly, in the process of heating operation of the air conditioner, when at least one of the following conditions is met, the air conditioning system is controlled to enter a rapid heating mode.
1) After receiving the indoor set temperature set by the user, determining T1-Tt is less than or equal to Tx1, T4 is more than or equal to Tx2, and Tp is less than or equal to Tx3, wherein T1 is the indoor ambient temperature, Tt is the indoor set temperature, T4 is the outdoor ambient temperature, Tp is the exhaust temperature of the compressor, Tx1 is a first temperature threshold, Tx2 is a second temperature threshold, and Tx3 is a third temperature threshold.
Wherein, the normal operation of the air conditioner can be protected by judging that T4 is more than or equal to Tx2 and Tp is less than or equal to Tx 3.
2) And receiving a quick heating instruction selected by a user, wherein the user can input the quick heating instruction by selecting a quick heating key.
For example, when the air conditioning system performs heating operation, a user may select a fast heating button through a control terminal, such as an air conditioning remote controller, the control terminal sends an instruction for selecting fast heating input by the user to the control device, and the control device may control the air conditioning system to enter a fast heating mode according to the received instruction. Or, when the air conditioning system is in heating operation, if the indoor set temperature Tt is set, and T1-Tt is detected to be less than or equal to Tx1, T4 is detected to be more than or equal to Tx2, and Tp is detected to be less than or equal to Tx3, then the rapid heating mode is directly entered.
S2: and according to the current temperature parameter of the compressor, the running frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are improved.
In one embodiment of the present invention, the outdoor fan has a plurality of wind wheels, and increasing the rotation speed of the outdoor fan comprises: sequentially increasing the rotating speeds of the plurality of wind wheels according to a preset priority, wherein the rotating speed of one wind wheel in the plurality of wind wheels is increased each time; or, the rotational speed of multiple wind wheels is increased simultaneously.
When the rotating speeds of the wind wheels are sequentially increased according to the preset priority, the rotating speed of the wind wheel with the current priority is increased to the rotating speed of the wind wheel with the previous priority each time.
Taking two-stage wind wheels as an example, if the priority of the first-stage wind wheel is lower than that of the second-stage wind wheel, the rotating speeds of the two-stage wind wheels can be increased according to the sequence from high to low, namely the rotating speed of the second-stage wind wheel can be increased firstly, and then the first-stage wind wheel is increased and supplemented, so that the rotating speed increasing mode of increasing the first-stage wind wheel and then supplementing the second-stage wind wheel is repeated continuously. Or the rotating speeds of the two stages of wind wheels can be increased according to the sequence of the priority levels from low to high, namely the rotating speed of the first stage of wind wheel can be increased firstly, and then the second stage of wind wheel is increased and supplemented, so that the rotating speed increasing mode of first-stage increase and then second-stage supplement is continuously repeated; or, the rotating speed of the second-stage wind wheel and the rotating speed of the first-stage wind wheel can be simultaneously increased; alternatively, at least two of the three lifting modes mentioned above may be used to increase the rotation speed of the two-stage wind wheel, for example, the lifting mode of first-stage lifting and then first-stage supplementing may be alternated with the lifting mode of first-stage lifting and then second-stage supplementing.
Therefore, according to the control method provided by the embodiment of the invention, after the air-conditioning system enters the rapid cooling mode or the rapid heating mode, the operating frequency of the compressor of the air-conditioning system and the rotating speed of the outdoor fan are increased according to the current temperature parameter of the compressor, so that the air quantity and the air speed passing through the outdoor heat exchanger are increased, the energy margin of the compressor is utilized as much as possible, the air-conditioning system is enabled to operate in rapid cooling or heating, the temporary high-capacity output requirement is met, and the indoor temperature is adjusted to the set temperature as soon as possible.
The following describes the method for controlling rapid cooling of an air conditioning system according to an embodiment of the present invention in detail, taking the cooling mode as an example.
According to an embodiment of the present invention, when the air conditioning system is in the rapid cooling mode, increasing the operating frequency of the compressor and the rotational speed of the outdoor fan of the air conditioning system according to the current temperature parameter of the compressor includes:
and according to the current exhaust temperature of the compressor, the running frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased.
Specifically, according to the current exhaust temperature of the compressor, the operation frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased, and the method comprises the following steps:
before the rotating speed of the outdoor fan is increased every time, whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not is judged;
if the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is greater than or equal to a first threshold value, increasing the operating frequency of the compressor;
and if the temperature difference value between the limit value of the exhaust temperature of the compressor and the current exhaust temperature of the compressor is smaller than a first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, increasing the rotating speed of the outdoor fan.
When the rotating speed of the outdoor fan is increased to the maximum rotating speed, the rotating speed of the outdoor fan and the operating frequency of the compressor are kept unchanged.
It should be noted that the maximum rotation speed value is the maximum value under the condition that the outdoor fan is not stalled, the rotation speed of the outdoor fan reaching the maximum rotation speed value may mean that the rotation speeds of the plurality of wind wheels of the cyclone fan all reach the maximum value, taking a two-stage wind wheel as an example, the rotation speed of the outdoor fan reaching the maximum rotation speed value may mean that the rotation speed n1 of the first-stage wind wheel reaches the maximum rotation speed value n1max, and the rotation speed n2 of the second-stage wind wheel reaches the maximum rotation speed value n2max, that is, n1 is greater than or equal to n1max and n2 is greater than or equal. The discharge temperature limit Tpmax is the maximum acceptable discharge temperature of the compressor.
It can be understood that when the air conditioning system enters the rapid cooling mode, the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan can be increased according to the current exhaust temperature of the compressor.
In particular, it can be determined whether the temperature difference between the discharge temperature limit Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold Tpx, i.e. whether Tpmax-Tp ≧ Tpx is true, wherein the first threshold can be zero degrees Centigrade or close to zero degrees Centigrade, for example 5 ℃.
If the situation is true, i.e. Tpmax-Tp ≧ Tpx, it indicates that the current discharge temperature Tp of the compressor is greatly different from the discharge temperature limit value Tpmax of the compressor, and the operating frequency of the compressor has a room to be increased, at this time, the operating frequency of the compressor is increased, e.g. each time f Hz is increased, f can be a fixed value. Then, whether Tpmax-Tp is more than or equal to Tpx is judged again, and if yes, the operation frequency of the compressor is increased again. The circulation is carried out until Tp is close to Tpmax, namely, Tpmax-Tp < Tpx, so that the capacity margin of the compressor is consumed, the energy margin of the compressor is utilized as much as possible, and the exhaust temperature Tp is lower than the exhaust temperature limit value Tpmax, so that the reliability of the air conditioning system can be ensured.
If the temperature difference between the current exhaust temperature Tp of the compressor and the exhaust temperature limit value Tpmax of the compressor is smaller than the first threshold value Tpx, namely Tpmax-Tp < Tpx, the capacity margin of the compressor is consumed, and at the moment, the rotating speed of the outdoor fan can be increased according to the current exhaust temperature of the compressor.
If the rotating speed of the outdoor fan after being promoted does not reach the maximum rotating speed, judging whether the temperature difference value Tpx between the exhaust temperature limit value Tpmax of the compressor and the current exhaust temperature Tp of the compressor is larger than or equal to the first threshold value again, if Tpmax-Tp is smaller than Tpx, promoting the rotating speed of the outdoor fan again until the rotating speed of the outdoor fan is promoted to the maximum rotating speed. If the rotating speed of the outdoor fan is increased to the maximum rotating speed, the next steps are not carried out, and the existing state is kept, namely the rotating speed of the existing outdoor fan and the operating frequency of the compressor are kept unchanged until the working condition changes, such as the user changes the indoor set temperature or the environmental temperature changes.
In addition, according to an embodiment of the present invention, before increasing the operating frequency of the compressor and the rotational speed of the outdoor fan of the air conditioning system according to the current temperature parameter of the compressor, the method further includes:
and increasing the rotating speed of the outdoor fan to a target rotating speed.
According to an embodiment of the present invention, before increasing the operating frequency of the compressor and the rotational speed of the outdoor fan of the air conditioning system according to the current temperature parameter of the compressor, the method further includes:
and the rotating speed of the indoor fan is increased to the maximum rotating speed.
It is understood that the rotation speed of the outdoor fan may be increased to a target rotation speed before the operation frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan are increased according to the current temperature parameter of the compressor, so that the rotation speed of the outdoor fan is increased to the target rotation speed before the rotation speed of the outdoor fan is increased, for example, the rotation speed n1 of the primary wind wheel is increased to n11, and the rotation speed n2 of the secondary wind wheel is increased to n21, wherein the target rotation speed is less than the maximum rotation speed of the outdoor fan, that is, the rotation speed n1 of the primary wind wheel is less than the maximum rotation speed value n1max, and/or the rotation speed n2 of the secondary wind wheel is less than the maximum rotation speed value n2max, so that the adjustment. Or before the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased according to the current temperature parameter of the compressor, the rotating speed of the indoor fan can be increased to the maximum rotating speed, so that the output capacity of the air conditioning system can be further increased. In addition, before the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased according to the current temperature parameter of the compressor, the rotating speed of the outdoor fan can be increased to a target rotating speed, and meanwhile, the rotating speed of the indoor fan is increased to the maximum rotating speed.
According to the embodiment of fig. 2, the refrigeration control method of the air conditioning system according to one embodiment of the present invention includes the steps of:
s201: entering a rapid cooling mode, and recording the state of the air conditioning system, such as the rotation speed Fr of the compressor, the opening Lr of the electronic expansion valve and the initial rotation speed of the outdoor fan.
S202: and increasing the rotating speed of the outdoor fan to a target rotating speed.
S203: it is determined whether the temperature difference Tpx between the discharge temperature limit Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold.
If yes, executing step S204; if not, step S205 is performed.
S204: the operation frequency of the compressor is increased, and the process returns to step S203.
S205: and the rotating speed of the outdoor fan is increased.
S206: and judging whether the rotating speed of the outdoor fan reaches the maximum rotating speed or not.
If yes, go to step S207; if not, return to step S203.
S207: and keeping the existing state, namely keeping the rotating speed of the existing outdoor fan and the running frequency of the compressor unchanged.
The method for increasing the rotating speed of the outdoor fan in the rapid refrigeration control method is further described by taking a two-stage wind wheel as an example.
It can be understood that before the rotation speed of the outdoor fan is increased each time, whether the temperature difference between the exhaust temperature limit value Tpmax of the compressor and the current exhaust temperature Tp of the compressor is greater than or equal to the first threshold value Tpx or not can be judged, wherein the maximum rotation speed value n2max of the secondary wind wheel can be greater than or equal to the maximum rotation speed value n1max of the primary wind wheel, namely n2max is greater than or equal to n1 max. If Tpmax-Tp is more than or equal to Tpx, the running frequency of the compressor is increased; and if the Tpmax-Tp is less than the Tpx, the rotating speed of the primary wind wheel and/or the secondary wind wheel is increased.
Specifically, the rotation speed of the two-stage wind wheel is increased, the rotation speed of the two-stage wind wheel may be increased, for example, the rotation speed n2 to n2+ nx of the two-stage wind wheel is increased, wherein if n2+ nx is greater than or equal to n2max, n2 is made equal to n2max, that is, if the rotation speed n2 of the two-stage wind wheel reaches the maximum rotation speed value n2max, the rotation speed is not increased, then it is determined whether the temperature difference between the exhaust temperature limit value Tpmax of the compressor and the current exhaust temperature Tp of the compressor is greater than or equal to a first threshold value Tpx (for the exhaust temperature to be lower than the limit temperature to ensure the reliability of the air conditioner, the temperature difference between Tpmax and Tp is made smaller than Tpx), if Tpmax-Tp < Tpx, the rotation speed of the one-stage wind wheel is increased, specifically, the rotation speed of the one-stage wind wheel may be increased to the rotation speed of the two-stage wind wheel, for example, the rotation speed n1 to n2+ nx of the one-stage wind wheel is increased, wherein if n2+ nx n1 is greater than, if the rotational speed n1 of the primary rotor has reached the maximum rotational speed value n1max, it is not increased any more. And then judging whether the rotating speed n1 of the primary wind wheel reaches a maximum rotating speed value n1max and the rotating speed n2 of the secondary wind wheel reaches a maximum rotating speed value n2max, if n1 does not reach n1max or n2 does not reach n2max, judging whether the temperature difference value between the exhaust temperature limit value Tpmax of the compressor and the current exhaust temperature Tp of the compressor is larger than or equal to a first threshold value Tpx again, repeating the steps to increase the rotating speed of the secondary wind wheel and the rotating speed of the primary wind wheel until the rotating speed of the secondary wind wheel is increased to the maximum rotating speed value n2max, and increasing the rotating speed of the primary wind wheel to the maximum rotating speed value n1 max.
It should be noted that, because the second-stage wind wheel is raised first and then the first-stage wind wheel is supplemented, the first-stage wind wheel can also be raised under the condition that the rotating speed of the second-stage wind wheel can be raised, at this time, the rotating speed judgment is only made after the rotating speed of the second-stage wind wheel and the rotating speed of the first-stage wind wheel are both raised once, that is, after the rotating speed of the second-stage wind wheel is raised, the rotating speed of the default first-stage wind wheel does not reach n1max, and therefore the rotating speed judgment is not made.
Or, the rotation speed of the two-stage wind wheel is increased, the rotation speed of the one-stage wind wheel is increased, for example, the rotation speed n1 to n1+ nx of the one-stage wind wheel is increased, wherein if n1+ nx is greater than or equal to n1max, n1 is made equal to n1max, that is, if the rotation speed n1 of the one-stage wind wheel reaches the maximum rotation speed value n1max, the rotation speed is not increased, then it is determined whether the temperature difference between the limit value Tpmax of the discharge temperature of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold Tpx (the temperature difference between Tpmax and Tp is smaller than Tpx in order to make the discharge temperature lower than the limit temperature for ensuring the reliability of the air conditioner), if Tpmax-Tp < Tpx, the rotation speed of the two-stage wind wheel is increased, specifically, the rotation speed of the two-stage wind wheel is increased to the current rotation speed of the one-stage wind wheel, for example, n2 to n1+ nx, wherein if n1+ nx 2max, n2, that is greater than or equal to n1max, if the rotational speed n2 of the secondary rotor has reached the maximum rotational speed value n2max, it is not increased any more. And then judging whether the rotating speed n1 of the primary wind wheel reaches a maximum rotating speed value n1max and the rotating speed n2 of the secondary wind wheel reaches a maximum rotating speed value n2max, if n1 does not reach n1max or n2 does not reach n2max, judging whether the temperature difference value between the exhaust temperature limit value Tpmax of the compressor and the current exhaust temperature Tp of the compressor is larger than or equal to a first threshold value Tpx again, repeating the steps to increase the rotating speed of the primary wind wheel and the rotating speed of the secondary wind wheel until the rotating speed of the secondary wind wheel is increased to the maximum rotating speed value n2max, and increasing the rotating speed of the primary wind wheel to the maximum rotating speed value n1 max.
It should be noted that, because the first-stage raising and the second-stage supplementing are adopted, the second-stage wind wheel can be raised under the condition that the rotating speed of the first-stage wind wheel can be raised, at the moment, the rotating speed judgment is only carried out after the rotating speed of the first-stage wind wheel and the rotating speed of the second-stage wind wheel are raised once, namely, after the rotating speed of the first-stage wind wheel is raised, the rotating speed of the default second-stage wind wheel does not reach n2max, and therefore the rotating speed judgment is not carried out.
Or, the rotation speed of the two-stage wind wheel is increased, the rotation speed of the first-stage wind wheel and the rotation speed of the second-stage wind wheel can be increased at the same time, for example, the rotation speed n1 to n1+ nx of the first-stage wind wheel is increased, wherein if n1+ nx is greater than or equal to n1max, n1 is made equal to n1max, that is, if the rotation speed n1 of the first-stage wind wheel has reached the maximum rotation speed value n1max, then the rotation speed n2 to n2+ ny is increased, wherein if n2+ ny is greater than or equal to n2max, n2 is made equal to n2max, that is, if the rotation speed n2 of the second-stage wind wheel has reached the maximum rotation speed value n2max, then the increase is not performed, then it is determined whether the rotation speed n1 of the first-stage wind wheel has reached the maximum rotation speed value n1max and the rotation speed n2 of the second-stage wind wheel has reached the maximum rotation speed value n2max, if n1 has not reached the maximum rotation speed value n1max, then it is determined whether the exhaust temperature limit Tpmax of the compressor is greater than or equal to the first exhaust temperature limit Tpmax, and if the temperature difference between Tpmax and Tp is smaller than Tpx), if Tpmax-Ttp is smaller than Tpx, the rotating speed of the primary wind wheel and the rotating speed of the secondary wind wheel are continuously increased. And repeating the steps to increase the rotating speed of the primary wind wheel and the rotating speed of the secondary wind wheel until the rotating speed of the secondary wind wheel is increased to the maximum rotating speed value n2max and the rotating speed of the primary wind wheel is increased to the maximum rotating speed value n1 max.
It should be noted that, in the embodiment of the present invention, after the rotation speed of the outdoor fan is changed or the operating frequency of the compressor is changed, if there are determination conditions, for example, whether the temperature difference between the discharge temperature limit Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to the first threshold Tpx, and whether the rotation speed of the outdoor fan reaches the maximum rotation speed, the determination is performed after waiting for the preset time Xs.
According to the embodiment of fig. 3, the refrigeration control method of the air conditioning system according to one embodiment of the present invention includes the following steps:
s301: receiving a quick refrigeration instruction selected by a user, or T1-Tt is more than or equal to Tx1, T4 is less than or equal to Tx2, and Tp is less than or equal to Tx 3.
S302: when the air conditioning system is determined to enter the quick cooling mode, recording the initial rotating speed n01 of the first-stage wind wheel and the initial rotating speed n02 of the second-stage wind wheel of the outdoor fan in the air conditioning system, and recording the exhaust temperature Tp0 of the compressor.
S303: and raising the rotating speed of the indoor fan to the maximum rotating speed, raising the rotating speed n1 of the primary wind wheel to a target rotating speed n11, and raising the rotating speed n2 of the secondary wind wheel to a target rotating speed n 21.
S304: it is determined whether the temperature difference Tpx between the discharge temperature limit Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold.
If yes, go to step S305; if not, step S306 is performed.
S305: the operation frequency F of the compressor is increased to F + F, and the process returns to step S304.
S306: and increasing the rotating speed n1 to n1+ nx of the first-stage wind wheel, wherein if n1+ nx is larger than or equal to n1max, n1 is equal to n1 max.
S307: it is determined whether the temperature difference Tpx between the discharge temperature limit Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold.
If yes, go to step S305; if not, step S308 is performed.
S308: and increasing the rotation speed n2 to n2+ nx of the second-stage wind wheel, wherein if n2+ nx is larger than or equal to n2max, n2 is equal to n2 max.
S309: and judging whether the rotating speed n1 of the primary wind wheel of the outdoor fan reaches the maximum rotating speed value n1max or not, and whether the rotating speed n2 of the secondary wind wheel reaches the maximum rotating speed value n2max or not.
If yes, go to step S310; if not, return to step S304.
S310: and keeping the existing state, namely keeping the rotating speed of the existing outdoor fan and the running frequency of the compressor unchanged until the use is changed by a user or the environment is changed.
As an example, when it is detected that the air conditioning system is cooling, if the set indoor set temperature Tt is 17 ℃, and T1 is 32 ℃, T1-Tt is 15 ℃ or more, T4 is 35 ℃ or less and 40 ℃, Tp is 72 ℃ or more and 98 ℃, the rapid cooling mode may be directly entered;
recording n 1-n 2-600 r/min, and recording compressor exhaust temperature Tp 0-74 ℃;
the rotating speed of the indoor fan is increased to 1500r/min at most, the rotating speed n1 of the first-stage wind wheel of the outdoor fan is increased to 650r/min from 600r/min, and the rotating speed n2 of the second-stage wind wheel is increased to 650r/min from 600 r/min;
determining whether Tpmax-Tp is greater than or equal to Tpx: 98-72 ═ 26 ℃, greater than 5 ℃, increasing the operating frequency of the compressor from 51hz to 52hz, waiting for Xs;
determining whether Tpmax-Tp is greater than or equal to Tpx: 98-73 ═ 25 ℃, greater than 5 ℃, increasing the operating frequency of the compressor from 52hz to 53hz, waiting for Xs;
…
determining whether Tpmax-Tp is greater than or equal to Tpx: 98-94 deg.C, 4 deg.C, less than 5 deg.C;
increasing the rotation speed n1 of the primary wind wheel to 650 r/min-700 r/min, and waiting for Xs;
determining whether Tpmax-Tp is greater than or equal to Tpx: 98-94 deg.C, 4 deg.C, less than 5 deg.C;
increasing the rotation speed n2 of the primary wind wheel to 650 r/min-700 r/min, and waiting for Xs;
determining whether Tpmax-Tp is greater than or equal to Tpx: 98-91 ═ 7 ℃ greater than 5, increase compressor frequency 51hz to 52hz, wait for Xs;
…
determining whether Tpmax-Tp is greater than or equal to Tpx: 98-94 deg.C, 4 deg.C, 5 deg.C less;
n1 and n2 have reached the maximum rotation speed of 1100r/min, and the existing state is maintained.
Therefore, the rotating speed of the outdoor fan is increased to improve the air volume and the air speed of the outdoor heat exchanger, and the energy margin of the compressor is utilized as much as possible, so that the air conditioner can be rapidly refrigerated and operated, and the temporary high-capacity output requirement is met.
The following describes a method for controlling rapid heating in an air conditioning system according to an embodiment of the present invention in detail, taking a heating mode as an example.
According to an embodiment of the present invention, when the air conditioning system is in the rapid heating mode, increasing the operating frequency of the compressor and the rotational speed of the outdoor fan of the air conditioning system according to the current temperature parameter of the compressor includes:
and according to the current exhaust temperature of the compressor and the current suction temperature of the compressor, the running frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased.
Specifically, according to the current exhaust temperature of the compressor and the current suction temperature of the compressor, the operation frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased, and the method comprises the following steps:
before the rotating speed of the outdoor fan is increased every time, whether the temperature difference between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not and whether the temperature difference between the current suction temperature of the compressor and the suction temperature limit value of the compressor is larger than or equal to a second threshold value or not are judged;
if the temperature difference between the discharge temperature limit value of the compressor and the current discharge temperature of the compressor is greater than or equal to a first threshold value and the temperature difference between the current suction temperature of the compressor and the suction temperature limit value of the compressor is greater than or equal to a second threshold value, increasing the operating frequency of the compressor;
and if the temperature difference between the limit value of the discharge temperature of the compressor and the current discharge temperature of the compressor is smaller than a first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, or the temperature difference between the current suction temperature of the compressor and the limit value of the suction temperature of the compressor is smaller than a second threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, increasing the rotating speed of the outdoor fan.
When the rotating speed of the outdoor fan is increased to the maximum rotating speed, the rotating speed of the outdoor fan and the operating frequency of the compressor are kept unchanged.
In addition, according to an embodiment of the present invention, before increasing the operating frequency of the compressor and the rotational speed of the outdoor fan of the air conditioning system according to the current temperature parameter of the compressor, the method further includes:
and increasing the rotating speed of the outdoor fan to a target rotating speed.
According to an embodiment of the present invention, before increasing the operating frequency of the compressor and the rotational speed of the outdoor fan of the air conditioning system according to the current temperature parameter of the compressor, the method further includes:
and the rotating speed of the indoor fan is increased to the maximum rotating speed.
It can be understood that the control flow of the rapid heating mode is basically consistent with the control flow of the rapid cooling mode, and the difference is that the judgment condition of the exhaust temperature in the rapid cooling mode is modified into the judgment conditions of the exhaust temperature and the suction temperature, and the specific judgment condition is as follows: whether Tpmax-Tp is larger than or equal to Tpx and Ts-Tsmin is larger than or equal to Tsx or not is established, if yes, the Tpmax-Tp is larger than or equal to Tpx and Ts-Tsmin is larger than or equal to Tsx, the operating frequency of the compressor is increased. If not, namely Tpmax-Tp is less than Tpx or Ts-Tsmin is less than Tsx, the rotating speed of the outdoor fan is increased until the maximum rotating speed is reached. Wherein Ts is the current suction temperature of the compressor, Tsmin is the suction temperature limit value of the compressor, Tsmin is the minimum acceptable return air temperature of the compressor, and Tsx is a second threshold value.
According to the embodiment of fig. 4, the heating control method of the air conditioning system according to one embodiment of the present invention includes the steps of:
s401: the state of the air conditioning system, for example, the rotation speed Fr of the compressor, the opening Lr of the electronic expansion valve, and the initial rotation speed of the outdoor fan are recorded.
S402: and increasing the rotating speed of the outdoor fan to a target rotating speed.
S403: and judging whether the temperature difference value Tpx between the discharge temperature limit value Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold value or not and whether the temperature difference value between the current suction temperature Ts of the compressor and the suction temperature limit value Tsmin of the compressor is greater than or equal to a second threshold value Tsx or not.
If so, i.e. Tpmax-Tp is more than or equal to Tpx, and Ts-Tsmin is more than or equal to Tsx, executing step S404; if not, i.e., Tpmax-Tp < Tpx or Ts-Tsmin < Tsx, step S405 is executed.
S404: the operating frequency of the compressor is increased and the process returns to step S403.
S405: and the rotating speed of the outdoor fan is increased.
S406: and judging whether the rotating speed of the outdoor fan reaches the maximum rotating speed or not.
If yes, go to step S407; if not, return to step S403.
S407: and keeping the existing state, namely keeping the rotating speed of the existing outdoor fan and the running frequency of the compressor unchanged.
According to the embodiment of fig. 5, the heating control method of the air conditioning system according to an embodiment of the present invention includes the steps of:
s501: receiving a quick heating instruction selected by a user, or T1-Tt is less than or equal to Tx1, T4 is more than or equal to Tx2, and Tp is less than or equal to Tx 3.
S502: when the air conditioning system is determined to enter the rapid heating mode, the initial rotating speed n01 of the first-stage wind wheel and the initial rotating speed n02 of the second-stage wind wheel of the outdoor fan in the air conditioning system are recorded, and the exhaust temperature Tp0 of the compressor is recorded.
S503: and raising the rotating speed of the indoor fan to the maximum rotating speed, raising the rotating speed n1 of the primary wind wheel to a target rotating speed n11, and raising the rotating speed n2 of the secondary wind wheel to a target rotating speed n 21.
S504: and judging whether the temperature difference between the discharge temperature limit value Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold value Tpx or not and whether the temperature difference between the current suction temperature Ts of the compressor and the suction temperature limit value Tsmin of the compressor is greater than or equal to a second threshold value Tsx or not.
If yes, i.e. Tpmax-Tp is more than or equal to Tpx, and Ts-Tsmin is more than or equal to Tsx, executing step S505; if not, i.e., Tpmax-Tp < Tpx or Ts-Tsmin < Tsx, step S506 is executed.
S505: the operation frequency F of the compressor is increased to F + F, and the process returns to step S504.
S506: and increasing the rotating speed n1 to n1+ nx of the first-stage wind wheel, wherein if n1+ nx is larger than or equal to n1max, n1 is equal to n1 max.
S507: and judging whether the temperature difference between the discharge temperature limit value Tpmax of the compressor and the current discharge temperature Tp of the compressor is greater than or equal to a first threshold value Tpx or not and whether the temperature difference between the current suction temperature Ts of the compressor and the suction temperature limit value Tsmin of the compressor is greater than or equal to a second threshold value Tsx or not.
If yes, i.e. Tpmax-Tp is more than or equal to Tpx, and Ts-Tsmin is more than or equal to Tsx, executing step S505; if not, i.e., Tpmax-Tp < Tpx or Ts-Tsmin < Tsx, step S508 is executed.
S508: and increasing the rotation speed n2 to n2+ nx of the second-stage wind wheel, wherein if n2+ nx is larger than or equal to n2max, n2 is equal to n2 max.
S509: and judging whether the rotating speed n1 of the primary wind wheel of the outdoor fan reaches the maximum rotating speed value n1max or not, and whether the rotating speed n2 of the secondary wind wheel reaches the maximum rotating speed value n2max or not.
If yes, go to step S510; if not, return to step S504.
S510: and keeping the existing state, namely keeping the rotating speed of the existing outdoor fan and the running frequency of the compressor unchanged until the use is changed by a user or the environment is changed.
It should be noted that, after the method according to the embodiment of the present invention is adopted to increase the operating frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan, if the finally obtained discharge temperature of the compressor is greater than the sum of the discharge temperature limit Tpmax and the third threshold Tpa, the operating frequency of the compressor is decreased by a small amount.
In summary, according to the control method of the air conditioning system provided by the embodiment of the invention, after the air conditioning system enters the fast cooling mode or the fast heating mode, the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased according to the current temperature parameter of the compressor, so that the air volume and the air speed passing through the outdoor heat exchanger are increased, the energy margin of the compressor is utilized as much as possible, the air conditioning system is enabled to operate in fast cooling or heating, and the temporary high-capacity output requirement is met.
In order to realize the embodiment, the invention further provides an air conditioning system.
Fig. 6 is a block schematic diagram of an air conditioning system according to an embodiment of the present invention. As shown in fig. 6, the air conditioning system includes: the air conditioner comprises an outdoor fan 10, a compressor 20 and a control device 30, wherein the control device 30 is connected with the outdoor fan 10 and the compressor 20, and the control device 30 is used for obtaining the current temperature parameter of the compressor 20 after determining that the air conditioner system enters a quick cooling mode or a quick heating mode, and increasing the operating frequency of the compressor 20 and the rotating speed of the outdoor fan 10 according to the current temperature parameter of the compressor 20.
According to an embodiment of the present invention, when the air conditioning system is in the rapid cooling mode, the control device 30 is configured to increase the operating frequency of the compressor 20 and the rotational speed of the outdoor fan 10 of the air conditioning system according to the current discharge temperature of the compressor 20.
According to an embodiment of the present invention, the control device 30 is further configured to determine whether a temperature difference between the discharge temperature limit value of the compressor 20 and the current discharge temperature of the compressor 20 is greater than or equal to a first threshold value before the rotational speed of the outdoor fan 10 is increased each time; wherein if the temperature difference between the discharge temperature limit value of the compressor 20 and the current discharge temperature of the compressor 20 is greater than or equal to the first threshold, the control device 30 increases the operation frequency of the compressor 20; if the temperature difference between the discharge temperature limit value of the compressor 20 and the current discharge temperature of the compressor 20 is less than the first threshold value and the rotation speed of the outdoor fan 10 is not increased to the maximum rotation speed, the control device 30 increases the rotation speed of the outdoor fan 10 again.
According to an embodiment of the present invention, when the air conditioning system is in the rapid heating mode, the control device 30 is configured to increase the operating frequency of the compressor 20 and the rotational speed of the outdoor fan 10 of the air conditioning system according to the current discharge temperature of the compressor 20 and the current suction temperature of the compressor 20.
According to an embodiment of the present invention, the control device 30 is further configured to determine whether a temperature difference between a discharge temperature limit value of the compressor 20 and a current discharge temperature of the compressor 20 is greater than or equal to a first threshold value and whether a temperature difference between a current suction temperature of the compressor 20 and a suction temperature limit value of the compressor 20 is greater than or equal to a second threshold value before the rotational speed of the outdoor fan 10 is increased each time; wherein the control device 30 increases the operating frequency of the compressor 20 if the temperature difference between the discharge temperature limit value of the compressor 20 and the current discharge temperature of the compressor 20 is greater than or equal to a first threshold value and the temperature difference between the current suction temperature of the compressor 20 and the suction temperature limit value of the compressor 20 is greater than or equal to a second threshold value; if the temperature difference between the discharge temperature limit value of the compressor 20 and the current discharge temperature of the compressor 20 is less than the first threshold value and the rotation speed of the outdoor fan 10 is not increased to the maximum rotation speed, or if the temperature difference between the current suction temperature of the compressor 20 and the suction temperature limit value of the compressor 20 is less than the second threshold value and the rotation speed of the outdoor fan 10 is not increased to the maximum rotation speed, the control device 30 increases the rotation speed of the outdoor fan 10 again.
According to an embodiment of the present invention, the control device 30 is further configured to maintain the rotation speed of the outdoor fan 10 and the operation frequency of the compressor 20 constant when the rotation speed of the outdoor fan 10 is increased to the maximum rotation speed.
According to an embodiment of the present invention, the control device 30 is configured to increase the rotation speed of the outdoor fan 10 to the target rotation speed before increasing the operation frequency of the compressor 20 and the rotation speed of the outdoor fan 10 of the air conditioning system according to the current temperature parameter of the compressor 20.
According to an embodiment of the present invention, the control device 30 is configured to increase the rotation speed of the indoor fan to the maximum rotation speed before increasing the operation frequency of the compressor 20 and the rotation speed of the outdoor fan 10 of the air conditioning system according to the current temperature parameter of the compressor 20.
In addition, in some embodiments of the present invention, the control device 30 is further configured to increase the rotation speed of the outdoor fan 10 to the target rotation speed, and simultaneously increase the rotation speed of the indoor fan to the maximum rotation speed, before increasing the operation frequency of the compressor 20 of the air conditioning system and the rotation speed of the outdoor fan 10 according to the current temperature parameter of the compressor 20.
According to an embodiment of the present invention, the outdoor fan 10 has a plurality of wind wheels, and the control device 30 is configured to sequentially increase the rotation speed of the plurality of wind wheels according to a preset priority, wherein the rotation speed of one wind wheel in the plurality of wind wheels is increased each time; or, the rotational speeds of multiple wind wheels are simultaneously increased.
According to an embodiment of the present invention, the control device 30 is configured to increase the rotation speed of the wind wheel of the current priority to the rotation speed of the wind wheel of the previous priority each time when the rotation speeds of the plurality of wind wheels are sequentially increased according to the preset priority.
According to an embodiment of the present invention, the control device 30 is further configured to control the air conditioning system to enter a fast cooling mode or a fast heating mode according to a command input by a user; alternatively, the control device 30 is further configured to control the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to the outdoor ambient temperature, the indoor set temperature, and the current discharge temperature of the compressor 20 of the air conditioning system.
According to an embodiment of the present invention, when the temperature difference between the indoor ambient temperature and the indoor set temperature is greater than or equal to the first temperature threshold, the outdoor ambient temperature is less than or equal to the second temperature threshold, and the current discharge temperature of the compressor 20 is less than or equal to the third temperature threshold, the control device 30 controls the air conditioning system to enter the fast cooling mode; when the temperature difference between the indoor ambient temperature and the indoor set temperature is less than or equal to the first temperature threshold, the outdoor ambient temperature is greater than or equal to the second temperature threshold, and the current exhaust temperature of the compressor 20 is less than or equal to the third temperature threshold, the control device 30 controls the air conditioning system to enter the fast heating mode.
It should be noted that the foregoing explanation of the embodiment of the control method of the air conditioning system is also applicable to the air conditioning system of this embodiment, and is not repeated here.
According to the air conditioning system provided by the embodiment of the invention, after the air conditioning system enters the rapid cooling mode or the rapid heating mode, the control device increases the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan according to the current temperature parameter of the compressor, so that the air quantity and the air speed passing through the outdoor heat exchanger are increased, the energy margin of the compressor is utilized as much as possible, the air conditioning system is enabled to operate in rapid cooling or heating, and the temporary high-capacity output requirement is met.
In order to implement the above embodiments, the present invention also proposes a readable storage medium having stored thereon a control program of an air conditioning system, which when executed by a processor, implements the control method of the air conditioning system of the foregoing embodiments.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing steps of a custom logic function or process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
The logic and/or steps represented in the flowcharts or otherwise described herein, e.g., an ordered listing of executable instructions that can be considered to implement logical functions, can be embodied in any computer-readable medium for use by or in connection with an instruction execution system, apparatus, or device, such as a computer-based system, processor-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions. For the purposes of this description, a "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transport the program for use by or in connection with the instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of the computer-readable medium would include the following: an electrical connection (electronic device) having one or more wires, a portable computer diskette (magnetic device), a Random Access Memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber device, and a portable compact disc read-only memory (CDROM). Additionally, the computer-readable medium could even be paper or another suitable medium upon which the program is printed, as the program can be electronically captured, via for instance optical scanning of the paper or other medium, then compiled, interpreted or otherwise processed in a suitable manner if necessary, and then stored in a computer memory.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. If implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc. Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.

Claims (10)

1. A control method of an air conditioning system is characterized by comprising the following steps:
after the air conditioning system is determined to enter a quick refrigerating mode or a quick heating mode, acquiring a current temperature parameter of a compressor of the air conditioning system, wherein the current temperature parameter of the compressor is the current exhaust temperature or the current suction temperature of the compressor; according to the current temperature parameter of the compressor, the running frequency of the compressor of the air-conditioning system and the rotating speed of an outdoor fan of the air-conditioning system are increased,
wherein, when the air conditioning system is in a fast cooling mode, according to the current exhaust temperature of the compressor, the operation frequency of the compressor of the air conditioning system and the rotation speed of the outdoor fan are increased, including: before the rotating speed of the outdoor fan is increased every time, whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not is judged; if the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to the first threshold value, increasing the running frequency of the compressor; if the temperature difference value between the limit value of the exhaust temperature of the compressor and the current exhaust temperature of the compressor is smaller than the first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, increasing the rotating speed of the outdoor fan; and/or the presence of a gas in the gas,
when the air conditioning system is in a fast heating mode, according to the current exhaust temperature of the compressor and the current suction temperature of the compressor, the operation frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan are increased, and the method comprises the following steps: before the rotating speed of the outdoor fan is increased every time, judging whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not, and whether the temperature difference value between the current suction temperature of the compressor and the suction temperature limit value of the compressor is larger than or equal to a second threshold value or not; increasing an operating frequency of the compressor if a temperature difference between a discharge temperature limit of the compressor and a current discharge temperature of the compressor is greater than or equal to a first threshold and a temperature difference between a current suction temperature of the compressor and a suction temperature limit of the compressor is greater than or equal to a second threshold; and if the temperature difference between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is smaller than a first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, or the temperature difference between the current suction temperature of the compressor and the suction temperature limit value of the compressor is smaller than a second threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, increasing the rotating speed of the outdoor fan.
2. The control method of an air conditioning system according to claim 1, wherein when the rotation speed of the outdoor fan is increased to the maximum rotation speed, the rotation speed of the outdoor fan and the operation frequency of the compressor are maintained.
3. The control method of an air conditioning system according to claim 1, wherein before increasing the operating frequency of a compressor of the air conditioning system and the rotational speed of the outdoor fan according to the current temperature parameter of the compressor, the method further comprises:
and increasing the rotating speed of the outdoor fan to a target rotating speed.
4. The control method of an air conditioning system according to claim 1, wherein before increasing the operating frequency of a compressor of the air conditioning system and the rotational speed of the outdoor fan according to the current temperature parameter of the compressor, the method further comprises:
and increasing the rotating speed of an indoor fan of the air conditioning system to the maximum rotating speed.
5. The method of claim 1, wherein the outdoor fan has a plurality of wind wheels, and the increasing the rotation speed of the outdoor fan comprises:
sequentially increasing the rotating speeds of the plurality of wind wheels according to a preset priority, wherein the rotating speed of one wind wheel in the plurality of wind wheels is increased each time;
or, simultaneously increasing the rotational speed of the plurality of wind wheels.
6. The control method of the air conditioning system according to claim 5, wherein the rotation speed of the wind wheel of the current priority is increased to the rotation speed of the wind wheel of the previous priority each time when the rotation speeds of the plurality of wind wheels are sequentially increased according to a preset priority.
7. The control method of an air conditioning system according to claim 1, further comprising:
controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to an instruction input by a user;
or controlling the air conditioning system to enter the rapid cooling mode or the rapid heating mode according to the outdoor environment temperature, the indoor set temperature and the current exhaust temperature of the compressor of the air conditioning system.
8. The method of claim 7, wherein the controlling the air conditioning system into the rapid cooling mode or the rapid heating mode according to the outdoor ambient temperature, the indoor set temperature, and the current discharge temperature of the compressor of the air conditioning system comprises:
when the temperature difference between the indoor environment temperature and the indoor set temperature is greater than or equal to a first temperature threshold, the outdoor environment temperature is less than or equal to a second temperature threshold, and the current exhaust temperature of the compressor is less than or equal to a third temperature threshold, controlling the air conditioning system to enter the rapid cooling mode;
and when the temperature difference between the indoor environment temperature and the indoor set temperature is smaller than or equal to a first temperature threshold, the outdoor environment temperature is larger than or equal to a second temperature threshold, and the current exhaust temperature of the compressor is smaller than or equal to a third temperature threshold, controlling the air conditioning system to enter the rapid heating mode.
9. An air conditioning system, comprising:
an outdoor fan;
a compressor;
the control device is connected with the outdoor fan and the compressor, and is used for acquiring the current temperature parameter of the compressor after determining that the air conditioning system enters a quick refrigeration mode or a quick heating mode, and increasing the operating frequency of the compressor and the rotating speed of the outdoor fan according to the current temperature parameter of the compressor, wherein the current temperature parameter of the compressor is the current exhaust temperature or the current suction temperature of the compressor,
when the air conditioning system is in a rapid cooling mode, the control device is used for increasing the operating frequency of the compressor of the air conditioning system and the rotating speed of the outdoor fan according to the current exhaust temperature of the compressor, and the control device is also used for judging whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is greater than or equal to a first threshold value before increasing the rotating speed of the outdoor fan every time; if the temperature difference between the limit value of the discharge temperature of the compressor and the current discharge temperature of the compressor is greater than or equal to the first threshold, the control device increases the operating frequency of the compressor; if the temperature difference value between the limit value of the exhaust temperature of the compressor and the current exhaust temperature of the compressor is smaller than the first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, the control device increases the rotating speed of the outdoor fan; and/or the presence of a gas in the gas,
when the air conditioning system is in a quick heating mode, the control device is used for increasing the operating frequency of a compressor of the air conditioning system and the rotating speed of the outdoor fan according to the current exhaust temperature of the compressor and the current suction temperature of the compressor, and before the rotating speed of the outdoor fan is increased each time, the control device is also used for judging whether the temperature difference value between the exhaust temperature limit value of the compressor and the current exhaust temperature of the compressor is larger than or equal to a first threshold value or not and whether the temperature difference value between the current suction temperature of the compressor and the suction temperature limit value of the compressor is larger than or equal to a second threshold value or not; the control means increases the operating frequency of the compressor if the temperature difference between the discharge temperature limit value of the compressor and the current discharge temperature of the compressor is greater than or equal to a first threshold value and the temperature difference between the current suction temperature of the compressor and the suction temperature limit value of the compressor is greater than or equal to a second threshold value; if the temperature difference between the discharge temperature limit value of the compressor and the current discharge temperature of the compressor is smaller than a first threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, or the temperature difference between the current suction temperature of the compressor and the suction temperature limit value of the compressor is smaller than a second threshold value and the rotating speed of the outdoor fan is not increased to the maximum rotating speed, the control device increases the rotating speed of the outdoor fan.
10. A readable storage medium, having stored thereon a control program of an air conditioning system, which when executed by a processor, implements a control method of the air conditioning system according to any one of claims 1 to 8.
CN201910716029.2A 2019-08-05 2019-08-05 Air conditioning system and control method thereof Active CN110454950B (en)

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