CN111692705A - Control method, control device, air conditioning system, and computer-readable storage medium - Google Patents

Control method, control device, air conditioning system, and computer-readable storage medium Download PDF

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Publication number
CN111692705A
CN111692705A CN202010512642.5A CN202010512642A CN111692705A CN 111692705 A CN111692705 A CN 111692705A CN 202010512642 A CN202010512642 A CN 202010512642A CN 111692705 A CN111692705 A CN 111692705A
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CN
China
Prior art keywords
heating device
valve
heat exchanger
temperature
outdoor unit
Prior art date
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Granted
Application number
CN202010512642.5A
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Chinese (zh)
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CN111692705B (en
Inventor
尚亚浩
甄锦鹏
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Publication date
Application filed by GD Midea Air Conditioning Equipment Co Ltd filed Critical GD Midea Air Conditioning Equipment Co Ltd
Priority to CN202010512642.5A priority Critical patent/CN111692705B/en
Publication of CN111692705A publication Critical patent/CN111692705A/en
Priority to PCT/CN2021/089676 priority patent/WO2021249047A1/en
Priority to EP21820958.3A priority patent/EP4137751A4/en
Application granted granted Critical
Publication of CN111692705B publication Critical patent/CN111692705B/en
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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
    • 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
    • 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
    • F24F11/67—Switching between heating and cooling modes
    • 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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0096—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater combined with domestic apparatus
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B13/00—Compression machines, plants or systems, with reversible cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F25B47/022—Defrosting cycles hot gas defrosting
    • F25B47/025—Defrosting cycles hot gas defrosting by reversing the cycle
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2221/00—Details or features not otherwise provided for
    • F24F2221/18—Details or features not otherwise provided for combined with domestic apparatus
    • F24F2221/183—Details or features not otherwise provided for combined with domestic apparatus combined with a hot-water boiler
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/003—Indoor unit with water as a heat sink or heat source
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2313/00—Compression machines, plants or systems with reversible cycle not otherwise provided for
    • F25B2313/023—Compression machines, plants or systems with reversible cycle not otherwise provided for using multiple indoor units

Abstract

The invention discloses a control method, a control device, an air conditioning system and a computer readable storage medium, wherein the air conditioning system comprises an outdoor unit and a heating device, the outdoor unit comprises an outdoor unit heat exchanger and a first valve, the heating device is connected with the outdoor unit heat exchanger through a first valve pipeline, and the control method comprises the following steps: detecting the on-off state of the heating device under the condition of acquiring a defrosting signal; under the condition that the heating device is in an opening state, controlling the first valve to be opened so as to conduct a pipeline between the heating device and an external machine heat exchanger, and enabling the heating device to participate in defrosting operation; under the condition that the heating device is in a closed state, the first valve is controlled to be closed so as to cut off a pipeline between the heating device and an outdoor unit heat exchanger, and further the heating device does not participate in defrosting operation; and under the condition that the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, controlling the first valve to be closed or finishing the defrosting operation.

Description

Control method, control device, air conditioning system, and computer-readable storage medium
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a control method, a control device, an air conditioning system, and a computer-readable storage medium.
Background
In the related art, an air conditioning device is provided with a hydraulic device for heating, and when the air conditioning device is defrosted, the hydraulic device is often in a low-temperature environment due to the participation of defrosting, so that a pipeline in the hydraulic device is easily frozen, and normal use is affected.
Disclosure of Invention
Embodiments of the present invention provide a control method, a control apparatus, an air conditioning system, and a computer-readable storage medium.
The control method provided by the embodiment of the invention is used for an air conditioning system, the air conditioning system comprises an outdoor unit and a heating device, the outdoor unit comprises an outdoor unit heat exchanger and a first valve, the heating device is connected with the outdoor unit heat exchanger through a first valve pipeline, and the control method comprises the following steps:
detecting the on-off state of the heating device under the condition of acquiring a defrosting signal;
under the condition that the heating device is in an opening state, controlling the first valve to be opened so as to conduct a pipeline between the heating device and the external machine heat exchanger, and enabling the heating device to participate in defrosting operation;
under the condition that the heating device is in a closed state, controlling the first valve to be closed so as to cut off a pipeline between the heating device and the outdoor unit heat exchanger, and further enabling the heating device not to participate in defrosting operation;
and under the conditions that the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, controlling the first valve to be closed or finishing the defrosting operation.
In the control method, the heating device is enabled to participate in defrosting when being in an open state, is not enabled to participate in defrosting when being in a closed state, and is not enabled to participate in defrosting when the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, so that the heating device can be fully utilized for defrosting and is not frozen, and the air conditioning system can normally run.
In some embodiments, the air conditioning system includes an indoor unit, the outdoor unit includes a second valve, the second valve connects the indoor unit and the outdoor unit heat exchanger, and the control method includes:
detecting the current working mode of the indoor unit under the condition of acquiring the defrosting signal;
under the condition that the heating device is in a closed state or the mode of the heating device conflicts with that of the indoor unit, controlling the first valve to be closed so as to disconnect a pipeline between the heating device and the outdoor unit heat exchanger and further enable the heating device not to participate in defrosting operation, and controlling the second valve to be opened so as to enable a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger to be communicated and further enable the indoor unit to participate in defrosting operation;
under the condition that the heating device is in an opening state and the mode conflict does not exist between the heating device and the indoor unit, controlling the first valve to be opened so as to conduct a pipeline between the heating device and the outdoor unit heat exchanger, and enabling the heating device to participate in defrosting operation;
and under the condition that the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, controlling the first valve to be closed, and controlling the second valve to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, so that the indoor unit participates in defrosting operation.
In certain embodiments, the control method comprises:
and under the condition that the heating device is in an opening state and the mode conflict does not exist between the heating device and the indoor unit, controlling the second valve to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, and further enabling the indoor unit to participate in defrosting operation.
In some embodiments, the temperature of the heating device comprises an inlet water temperature and an outlet water temperature, the preset condition comprises a defrosting temperature threshold,
the control method comprises the following steps:
and under the condition that the smaller temperature of the water inlet temperature and the water outlet temperature is not greater than the defrosting temperature threshold value, determining that the temperature of the heating device meets the preset condition.
In certain embodiments, the defrosting temperature threshold is in the range of (0 ℃,10 ℃).
The control device for an air conditioning system provided by an embodiment of the present invention includes an outdoor unit and a heating device, the outdoor unit includes an outdoor unit heat exchanger and a first valve, the heating device is connected to the outdoor unit heat exchanger through the first valve pipe, and the control device includes:
the acquiring module is used for acquiring a defrosting signal;
the detection module is used for detecting the on-off state of the heating device;
the control module is used for controlling the first valve to be opened under the condition that the heating device is in an opening state so as to conduct a pipeline between the heating device and the outer machine heat exchanger, and further enabling the heating device to participate in defrosting operation; and
the first valve is controlled to be closed under the condition that the heating device is in a closed state, so that a pipeline between the heating device and the outdoor unit heat exchanger is disconnected, and the heating device does not participate in defrosting operation; and
and the first valve is controlled to be closed or the defrosting operation is finished under the conditions that the heating device participates in the defrosting operation and the temperature of the heating device meets the preset condition.
In the control device, the heating device participates in defrosting when being in an open state, does not participate in defrosting when being in a close state, and does not participate in defrosting when the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, so that the heating device can be fully utilized for defrosting and can not be frozen, and the air conditioning system can normally run.
In some embodiments, the air conditioning system includes an indoor unit, the outdoor unit includes a second valve, the second valve connects the indoor unit and the outdoor unit heat exchanger, the detecting module is configured to detect a current operating mode of the indoor unit when the defrosting signal is obtained,
the control module is used for controlling the first valve to be closed to disconnect a pipeline between the heating device and the outdoor unit heat exchanger under the condition that the heating device is in a closed state or the heating device and the indoor unit have mode conflict, so that the heating device does not participate in defrosting operation, and controlling the second valve to be opened to conduct the pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, so that the indoor unit participates in defrosting operation; and
the first valve is controlled to be opened to conduct a pipeline between the heating device and the outdoor unit heat exchanger under the condition that the heating device is in an opening state and the mode conflict does not exist between the heating device and the indoor unit, so that the heating device participates in defrosting operation; and
and the second valve is controlled to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, and further the indoor unit participates in the defrosting operation.
In some embodiments, the control module is configured to control the second valve to open to conduct a pipe between the corresponding indoor unit and the outdoor unit heat exchanger when the heating device is in an on state and there is no mode conflict between the heating device and the indoor unit, so that the indoor unit participates in a defrosting operation.
In some embodiments, the temperature of the heating device comprises an inlet water temperature and an outlet water temperature, the preset condition comprises a defrosting temperature threshold,
the control module is used for determining that the temperature of the heating device meets the preset condition under the condition that the smaller temperature of the water inlet temperature and the water outlet temperature is not greater than the defrosting temperature threshold value.
In certain embodiments, the defrosting temperature threshold is in the range of (0 ℃,10 ℃).
An air conditioning system provided by an embodiment of the invention comprises the control device of any one of the embodiments.
In the air conditioning system, the heating device participates in defrosting when being in an open state, does not participate in defrosting when being in a close state, and does not participate in defrosting when the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, so that the heating device can be fully utilized for defrosting and can not be frozen, and the air conditioning system can normally operate.
An embodiment of the present invention provides an air conditioning system, which includes a memory, a processor, and computer-executable instructions stored in the memory and executable on the processor, where the processor is configured to execute the computer-executable instructions to implement the steps of the control method according to any one of the above embodiments.
In the air conditioning system, the heating device participates in defrosting when being in an open state, does not participate in defrosting when being in a close state, and does not participate in defrosting when the heating device participates in defrosting operation and the temperature of the heating device meets preset conditions, so that the heating device can be fully utilized for defrosting and can not be frozen, and the air conditioning system can normally operate.
Embodiments of the present invention provide a non-transitory computer-readable storage medium containing computer-executable instructions, which, when executed by one or more processors, cause the processors to perform the steps of the control method of any of the above embodiments.
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 above 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 flow chart of a control method of an embodiment of the present invention;
fig. 2 is a partial structural schematic view of an air conditioning system according to an embodiment of the present invention;
FIG. 3 is a block diagram of a control apparatus according to an embodiment of the present invention;
FIG. 4 is another schematic structural diagram of a portion of an air conditioning system according to an embodiment of the present invention;
fig. 5 is a schematic view showing a structure of still another part of the air conditioning system according to the embodiment of the present invention;
FIG. 6 is another flow chart of a control method of an embodiment of the present invention;
FIG. 7 is still another flowchart of a control method of the embodiment of the invention;
FIG. 8 is still another flowchart of a control method of an embodiment of the present invention;
fig. 9 is a block diagram of an air conditioning system according to an embodiment of the present invention.
Description of the main element symbols:
air conditioning system 100, control device 200, and air conditioning system 300;
the outdoor unit 11, the heating device 13, the water inlet 131, the water outlet 133, the outdoor unit heat exchanger 15 and the first valve 17;
a compressor 21, a four-way valve 23, a first heat exchanger 25, an indoor unit 27, and a second valve 29;
an electric heating element 31, a heating coil 33 and a water tank 35;
the device comprises an acquisition module 110, a detection module 130 and a control module 150;
memory 210, processor 230.
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 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 accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The disclosure herein provides many different embodiments or examples for implementing different configurations of the invention. To simplify the disclosure of the present invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.
Referring to fig. 1 and 2, a control method according to an embodiment of the present invention is applied to an air conditioning system 100. The air conditioning system 100 includes an outdoor unit 11 and a heating device 13. The outdoor unit 11 includes an outdoor unit heat exchanger 15 and a first valve 17. The heating device 13 is connected with the external machine heat exchanger 15 through a first valve 17.
The control method comprises the following steps:
step S110: detecting the on-off state of the heating device 13 under the condition of acquiring a defrosting signal;
step S130: under the condition that the heating device 13 is in an open state, controlling the first valve 17 to be opened to conduct a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 to participate in defrosting operation;
step S150: under the condition that the heating device 13 is in a closed state, controlling the first valve 17 to be closed so as to cut off a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 not to participate in defrosting operation;
step S170: and controlling the first valve 17 to be closed or ending the defrosting operation when the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset condition.
The control method according to the embodiment of the present invention can be realized by the control device 200 according to the embodiment of the present invention. Specifically, referring to fig. 3, the control device 200 includes an obtaining module 110, a detecting module 130, and a control module 150. The acquiring module 110 is used for acquiring a defrosting signal. The detection module 130 is used for detecting the on-off state of the heating device 13. The control module 150 is configured to control the first valve 17 to open to conduct a pipe between the heating device 13 and the outdoor unit heat exchanger 15 when the heating device 13 is in an open state, so that the heating device 13 participates in a defrosting operation; and is used for controlling the first valve 17 to close under the condition that the heating device 13 is in a closed state so as to cut off a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 not to participate in defrosting operation; and is used for controlling the first valve 17 to close or ending the defrosting operation under the condition that the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset conditions.
In the control method and the control device 200, the heating device 13 is turned on to participate in defrosting, and is turned off to not participate in defrosting, and when the heating device 13 participates in defrosting and the temperature of the heating device 13 meets the preset conditions, the heating device 13 does not participate in defrosting, so that the heating device 13 can be fully utilized to defrost and is not frozen, and the air conditioning system 100 can normally operate.
Specifically, in the air conditioning system 100 of the embodiment shown in fig. 2, the outdoor unit 11 includes a compressor 21 and a four-way valve 23. The heating device 13 includes a first heat exchanger 25. The compressor 21 is a power of the air conditioning system 100, and in the air conditioning system 100, the purpose of the compressor 21 is to compress a low-temperature refrigerant into a high-temperature refrigerant, and finally the refrigerant exchanges heat with other media in the external heat exchanger 15. The compressor 21 may be a displacement compressor, a speed compressor, or the like. The four-way valve 23 switches different channels, so that the high-temperature refrigerant compressed by the compressor 21 flows through different pipelines, thereby realizing that the air conditioning system 100 can switch between a cooling function and a heating function. In the illustrated embodiment, the four-way valve 23 communicates the ports D and E and the ports C and S, thereby realizing the heating function of the air conditioning system 100.
The first heat exchanger 25 is configured to exchange heat of the high-temperature refrigerant in the heating device 13, thereby realizing a heating function of the heating device 13. The first heat exchanger 25 includes, but is not limited to, a floating head heat exchanger, a fixed tube and plate heat exchanger, a U-shaped tube and plate heat exchanger, and the like. In one embodiment, the first heat exchanger 25 is a plate heat exchanger.
Referring to fig. 2 and fig. 3, in another embodiment, a temperature sensing element (not shown) may be disposed on the outdoor unit heat exchanger 15, and the obtaining module 110 may obtain the temperature of the outdoor unit heat exchanger 15 through the temperature sensing element. The temperature of the outdoor unit heat exchanger 15 may be the temperature inside the outdoor unit heat exchanger 15 or the ambient temperature around the outdoor unit heat exchanger 15.
In an embodiment, the temperature sensing element may be an environment temperature sensing bulb for detecting an environment temperature around the external machine heat exchanger 15, and the environment temperature sensing bulb performs corresponding feedback when the environment temperature around the external machine heat exchanger 15 is less than or equal to a preset temperature, so that the obtaining module 110 obtains the defrosting signal. In other embodiments, the temperature-sensitive element may be a temperature sensor or an infrared sensor.
In the embodiment shown in fig. 3, the defrosting signal is sent to the detection module 130, and the detection module 130 detects the on-off state of the heating apparatus 13 according to the defrosting signal. It is understood that in other embodiments, the defrosting signal may be sent to the control module 150, so that the control module 150 controls the detection module 130 to detect the on/off state of the heating apparatus 13.
In addition, the defrosting signal may be sent to a terminal in wireless communication with the air conditioning system 100, including but not limited to a cell phone, a tablet, a personal computer, a wearable device, other air conditioning system 100, etc. The wireless communication can be realized by Bluetooth, WIFI, infrared, mobile network communication (such as 4G, 5G and the like) and other modes. In other embodiments, the defrosting signal may be generated by a remote controller of the air conditioning system 100 or the terminal and transmitted to the control device 200.
Referring to fig. 3 again, when the control device 200 receives the defrosting signal, the detecting module 130 detects an on/off state of the heating device 13, and sends information of the on/off state of the heating device 13 to the control module 150, so that the control module 150 can perform corresponding operations.
More specifically, in the case where the heating apparatus 13 is in the on state, the control module 150 controls the first valve 17 to be opened, so that the pipe between the heating apparatus 13 and the outdoor unit heat exchanger 15 is conducted. In this case, referring to fig. 2 again, the high-temperature refrigerant generated in the compressor 21 sequentially passes through the ports D and E and enters the first heat exchanger 25 in the heating device 13, and finally flows to the outdoor unit heat exchanger 15, so that the heating device 13 participates in the defrosting operation of the outdoor unit heat exchanger 15.
In the case where the heating apparatus 13 is in the off state, the control module 150 controls the first valve 17 to be closed such that the pipe between the heating apparatus 13 and the outdoor unit heat exchanger 15 is disconnected. In this case, it is possible to avoid that the internal piping of the heating apparatus 13 is frozen when the heating apparatus 13 participates in the defrosting operation, which affects the subsequent normal operation of the heating apparatus 13.
After the heating device 13 participates in the defrosting operation, if the temperature of the heating device 13 meets the preset condition, it is determined that the heating device 13 is no longer suitable for participating in the defrosting operation, so that the heating device 13 exits the defrosting operation of the external unit heat exchanger 15, and the freezing of the internal pipeline of the heating device 13 is avoided. The preset condition functions to prevent the heating device 13 from being damaged due to excessively low temperature. The preset condition may be understood as a low temperature prevention condition or an anti-freezing condition.
The temperature of the heating apparatus 13 may be the temperature of any pipe in the heating apparatus 13, or may be the temperature of other elements in the heating apparatus 13. In one embodiment, the preset condition comprises a defrost temperature threshold, the heating means 13 being provided with a temperature sensing element. When the temperature sensing element senses that the temperature of the heating device 13 is less than or equal to the defrosting temperature threshold, the control module 150 may control the first valve 17 to close, or control the outdoor unit 11 to stop defrosting to finish the defrosting operation, so as to prevent the temperature of the heating device 13 from further decreasing. The temperature sensing element includes, but is not limited to, a bulb, a temperature sensor, an infrared sensor, etc. In other embodiments, the preset condition may also be to detect the change amplitude of the temperature of the heating device 13 within a preset time period, and is not described in detail herein.
It can be understood that, when the heating apparatus 13 is in the on state, the heating apparatus 13 heats and has a higher temperature. In this case, the pipes inside the heating device 13 are not easily frozen, thereby facilitating the heating device 13 to participate in the defrosting operation. When the heating apparatus 13 is in the off state, the temperature in the heating apparatus 13 is low. In this case, the heating device 13 is not involved in the defrosting operation, so that the pipes inside the heating device 13 are not easily frozen to protect the heating device 13 from being affected.
In addition, the first valve 17 includes, but is not limited to, valves having different power sources, such as a solenoid valve, a hydraulic valve, a pneumatic valve, and a back pressure valve, and valves having different opening/closing modes, such as a gate valve, a stop valve, a plug valve, a ball valve, a butterfly valve, a diaphragm valve, a check valve, a throttle valve, and a pressure reducing valve. In one embodiment, the first valve 17 is an electronic expansion valve.
In addition, in other embodiments, the first valve 17 has an opening degree. By adjusting the opening of the first valve 17, the flow speed or flow rate of the high-temperature refrigerant in the heating device 13 can be controlled, and the control accuracy is improved. In one embodiment, the maximum opening of the first valve 17 is 480.
In addition, the heating device 13 may be used to heat and generate domestic hot water. Referring to fig. 2, 4 and 5, the heating device 13 includes an electric heating element 31. Specifically, the heating device 13 may perform a heating function by delivering a high-temperature refrigerant to the first heat exchanger 25 through the compressor 21, or may perform a domestic hot water generation by delivering a high-temperature refrigerant and heating the high-temperature refrigerant by the electric heating element 31. In the embodiment shown in fig. 5, the air conditioning system 100 includes a heating coil 33, the heating coil 33 may be installed in a room, and the heating device 13 may generate heating air from the heating coil 33 by heating. The air conditioning system 100 further includes a water tank 35, and the heating device 13 can supply domestic hot water to the water tank 35, so as to meet the requirement of a user for heating water through the heating device 13. Specifically, in the embodiment shown in fig. 2, the heating device 13 includes a water inlet 131 and a water outlet 133, the water inlet 131 is used for inputting cold water, and the water outlet 133 is used for outputting hot water. In one example, the electrical heating element 31 is an electrically heated tank.
Since the heating device 13 is in a high-temperature environment for a long time, if the pipes in the heating device 13 are frozen while participating in the defrosting operation, the pipes in the heating device 13 may be deformed or even broken due to long-term expansion and contraction with heat, which may affect the normal use of the heating device 13 and endanger the life safety of users.
It should be noted that, in some embodiments, in the case that the heating device 13 participates in the defrosting operation, please refer to fig. 3, the control module 150 may send a signal to the heating device 13, so that the heating device 13 sends a prompt of participating in defrosting. Specifically, in one embodiment, the air conditioning system 100 includes a reminder (not shown). The prompting component includes but is not limited to a buzzer, an LED lamp, a display screen, a speaker, etc., and the heating device 13 may send out a prompting message that the heating device 13 participates in defrosting to the user through at least one of an alarm prompting sound, a light with a specific change rule, a character on the display screen, and a voice.
Referring to fig. 4 and 5, in some embodiments, the air conditioning system 100 includes an indoor unit 27. The outdoor unit 11 includes a second valve 29, and the second valve 29 connects the indoor unit 27 and the outdoor unit heat exchanger 15. Referring to fig. 6, the control method includes:
step S210: detecting the current working mode of the indoor unit 27 under the condition of acquiring the defrosting signal;
step S230: under the condition that the heating device 13 is in a closed state or the mode conflict exists between the heating device 13 and the indoor unit 27, controlling the first valve 17 to be closed so as to disconnect a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, further enabling the heating device 13 not to participate in the defrosting operation, and controlling the second valve 29 to be opened so as to conduct a pipeline between the corresponding indoor unit 27 and the corresponding outdoor unit heat exchanger 15, further enabling the indoor unit 27 to participate in the defrosting operation;
step S250: under the condition that the heating device 13 is in an open state and the mode conflict does not exist between the heating device 13 and the indoor unit 27, controlling the first valve 17 to be opened so as to conduct a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 to participate in defrosting operation;
step S270: and under the condition that the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset conditions, controlling the first valve 17 to be closed, and controlling the second valve 29 to be opened so as to conduct the pipeline between the corresponding indoor unit 27 and the outdoor unit heat exchanger 15, thereby leading the indoor unit 27 to participate in the defrosting operation.
The control method according to the embodiment of the present invention can be realized by the control device 200 according to the embodiment of the present invention. Specifically, referring to fig. 3, the detecting module 130 is configured to detect a current operating mode of the indoor unit 27 when the defrosting signal is acquired. The control module 150 is configured to, when the heating device 13 is in a closed state or the heating device 13 and the indoor unit 27 have a mode conflict, control the first valve 17 to be closed to disconnect a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, so that the heating device 13 does not participate in the defrosting operation, and control the second valve 29 to be opened to conduct a pipeline between the corresponding indoor unit 27 and the outdoor unit heat exchanger 15, so that the indoor unit 27 participates in the defrosting operation; and is used for controlling the first valve 17 to be opened to conduct the pipeline between the heating device 13 and the outdoor unit heat exchanger 15 under the condition that the heating device 13 is in an opening state and the mode conflict does not exist between the heating device 13 and the indoor unit 27, so that the heating device 13 participates in defrosting operation; and the control unit is used for controlling the first valve 17 to be closed and controlling the second valve 29 to be opened to conduct the pipeline between the corresponding indoor unit 27 and the outdoor unit heat exchanger 15 under the conditions that the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset condition, so that the indoor unit 27 participates in the defrosting operation. In this way, the heating device 13 and the indoor unit 27 can cooperatively participate in the defrosting operation.
Specifically, referring to fig. 4 and 5, in the illustrated embodiment, the air conditioning system 100 has two indoor units 27 and two second valves 29. Each indoor unit 27 is communicated with the compressor 21 and the outdoor unit heat exchanger 15 to form corresponding and mutually independent pipeline loops. A second valve 29 is arranged in each pipe circuit, which second valve 29 is used to open and close the pipe circuit. It can be understood that the indoor unit 27 can be switched between the modes by changing the interface communicated by the four-way valve 23. In other embodiments, the number of indoor units 27 may also be other numbers, such as one, or more than two (e.g., three or more), and may be selected according to specific situations, and the specific principle is similar to that of the above embodiments, and will not be described in detail herein.
Referring to fig. 3, when the obtaining module 110 obtains the defrosting signal, the control module 150 may detect the operating mode of the indoor unit 27 through the detecting module 130. Specifically, the detection module 130 may receive the operating mode information of the indoor unit 27 through wired or wireless communication. The control module 150 determines the current operation mode of the indoor unit 27 according to the operation mode information of the corresponding indoor unit 27. The operation mode of the indoor unit 27 may include a cooling mode, a heating mode, a dehumidifying mode, a fresh air mode (or an air blowing mode), and the like.
In the embodiment shown in fig. 4 and 5, in the case where the heating apparatus 13 is in the off state or there is a mode conflict between the heating apparatus 13 and the indoor unit 27, the control module 150 may determine that the heating apparatus 13 does not have a condition for participating in the defrosting operation (i.e., the heating apparatus 13 cannot continuously heat up), thereby controlling the first valve 17 to be closed and the second valve 29 to be opened, so that the heating apparatus 13 does not participate in the defrosting operation and the indoor unit 27 participates in the defrosting operation. In this way, the defrosting operation can be performed by the indoor unit 27 while avoiding freezing of the heating apparatus 13. The indoor units 27 participating in the defrosting operation means that the control module 150 controls the second valve 29 to open to communicate with the pipe loop where the corresponding indoor unit 27 is located, so that the high-temperature refrigerant reaches the outdoor unit heat exchanger 15 through the indoor unit 27.
In the case where the heating apparatus 13 is in the on state and there is no mode conflict between the heating apparatus 13 and the indoor unit 27, the control module 150 may determine that the heating apparatus 13 has a condition for participating in the defrosting operation (i.e., the heating apparatus 13 can be in a higher temperature state due to heating), so as to control the first valve 17 to be opened, so that the heating apparatus 13 participates in the defrosting operation.
In the case that the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 satisfies the preset condition, that is, it is determined that the inside of the heating device 13 has a low temperature, in this case, please refer to fig. 3, the control module 150 closes the first valve 17 and opens the second valve 29, so that the heating device 13 exits the defrosting operation of the external machine heat exchanger 15, and the external machine 11 participates in the defrosting operation, and the defrosting operation of the external machine heat exchanger 15 can be continued even when the internal pipe of the heating device 13 is prevented from freezing.
In addition, the air conditioning system 100 may detect the current operation mode of the heating device 13 and the indoor unit 27 to perform the mode processing. Specifically, in the case where the control module 150 determines that the indoor unit 27 is in the on state and that the mode of the heating device 13 and the mode of the indoor unit 27 are in the conflict state, it can be confirmed that there is a mode conflict between the heating device 13 and the outdoor unit 11. In the case where there is a mode conflict, the heating apparatus 13 may be in a standby state or not operated or turned off, so that the heating apparatus 13 cannot be turned on. Mode conflicts may be determined on a case by case basis. In one embodiment, when the indoor unit 27 is in the on state and the heating apparatus 13 is in the off state, the heating apparatus 13 is turned on, so that the heating apparatus 13 is in the standby state with a mode conflict. For example, in the case where the indoor unit 27 operates in the cooling mode, the heating device 13 is turned on, and at this time, the heating device 13 heats while the indoor unit 27 cools, so that there is a mode conflict.
It can be understood that when the mode of the heating device 13 and the mode of the indoor unit 27 are not in a conflict state, it is confirmed that there is no mode conflict between the heating device 13 and the outdoor unit 11.
In addition, the second valve 29 includes, but is not limited to, valves having different power sources, such as a solenoid valve, a hydraulic valve, a pneumatic valve, and a back pressure valve, and valves having different opening modes, such as a gate valve, a stop valve, a plug valve, a ball valve, a butterfly valve, a diaphragm valve, a check valve, a throttle valve, and a pressure reducing valve. In one example, the second valve 29 is an electronic expansion valve.
In other embodiments, the second valve 29 has an opening degree. By adjusting the opening of the second valve 29, the flow speed or flow rate of the high-temperature refrigerant in the indoor unit 27 can be controlled, and the control accuracy is improved. In one embodiment, the maximum opening of the second valve 29 is 480.
It should be noted that, in some embodiments, in the case that the indoor unit 27 participates in the defrosting operation, the control module 150 may send a signal to the indoor unit 27, so that the indoor unit 27 sends a prompt of participating in defrosting. Specifically, the indoor unit 27 has a prompt (not shown). The prompting element includes but is not limited to a buzzer, an LED lamp, a display screen, a speaker, etc., and the indoor unit 27 can send out a prompting message for participating in defrosting to the user through at least one of an alarm prompting sound, a light with a specific change rule, characters on the display screen, and voice.
In other embodiments, the air conditioning system 100 may omit the indoor unit 27. Specifically, in such an embodiment, in the heating apparatus 13 shown in fig. 2, the water inlet 131 is connected to the F port in fig. 5, and the water outlet 133 is connected to the E port in fig. 5. In addition, the water inlet 131 may be communicated with a water supply pipeline to supply water to the heating device 13.
Referring to fig. 4, 5 and 7, in some embodiments, the control method includes:
step S310: when the heating device 13 is in the on state and there is no mode conflict between the heating device 13 and the indoor unit 27, the second valve 29 is controlled to be opened to conduct the pipe between the corresponding indoor unit 27 and the outdoor unit heat exchanger 15, so that the indoor unit 27 participates in the defrosting operation.
The control method according to the embodiment of the present invention can be realized by the control device 200 according to the embodiment of the present invention. Specifically, referring to fig. 3, the control module 150 is configured to control the second valve 29 to open to conduct a pipe between the corresponding indoor unit 27 and the outdoor unit heat exchanger 15 when the heating device 13 is in the on state and there is no mode conflict between the heating device 13 and the indoor unit 27, so that the indoor unit 27 participates in the defrosting operation. As such, the speed of the defrosting operation of the air conditioning system 100 may be increased.
Specifically, in the embodiment shown in fig. 4 and 5, when the control module 150 confirms that there is no mode conflict between the heating device 13 and the indoor unit 27, the first valve 17 and the second valve 29 may be controlled to be opened, so that the defrosting operation is performed by the heating device 13 and the indoor unit 27, and thus the defrosting speed to the outdoor unit heat exchanger 15 may be increased.
Referring to fig. 8, in some embodiments, the temperature of the heating device 13 includes an inlet water temperature and an outlet water temperature. The preset conditions include a defrosting temperature threshold. The control method comprises the following steps:
step S510: and under the condition that the smaller temperature of the inlet water temperature and the outlet water temperature is not greater than the defrosting temperature threshold, determining that the temperature of the heating device 13 meets the preset condition.
The control method according to the embodiment of the present invention can be realized by the control device 200 according to the embodiment of the present invention. Specifically, referring to fig. 3, the control module 150 is configured to determine that the temperature of the heating device 13 satisfies the preset condition when the smaller temperature of the inlet water temperature and the outlet water temperature is not greater than the defrosting temperature threshold. In this way, it is possible to accurately determine whether or not the current heating device 13 has the condition for participating in the defrosting operation.
Referring to fig. 2 and 4, in particular, the heating device 13 has a water inlet 131 and a water outlet 133. The temperature of the incoming water corresponds to the temperature of the inlet 131. The outlet water temperature corresponds to the temperature of the outlet 133. The heating device 13 is provided with temperature sensing elements (not shown) respectively at the water inlet 131 and the water outlet 133, and the water inlet temperature and the water outlet temperature can be detected by the temperature sensing elements. It will be appreciated that by comparing the inlet water temperature and the outlet water temperature, the smaller of the two can be derived.
In the case where the heating apparatus 13 is engaged in the defrosting operation, in the case where the smaller temperature of the water inlet 131 and the water outlet 133 is less than or equal to the defrosting temperature threshold, the control module 150 may determine that the pipes in the heating apparatus 13 are at a lower temperature and are likely to be frozen. It will be appreciated that in this case, the preset condition is that the smaller temperature of the water inlet 131 and the water outlet 133 is less than or equal to the defrosting temperature threshold, so that the control module 150 closes the first valve 17 and the heating device 13 does not participate in the defrosting operation.
In some embodiments, the defrosting temperature threshold is in the range of (0 ℃,10 ℃). Specifically, the defrosting temperature threshold can be adjusted according to specific conditions, and can also be calibrated through testing. In one example, the defrost temperature threshold is 5 ℃.
Referring to fig. 4 and 5, an air conditioning system 100 according to an embodiment of the present invention includes a control device 200 according to any of the above embodiments.
In the air conditioning system 100, the heating device 13 participates in defrosting when being in the on state, does not participate in defrosting when being in the off state, and the heating device 13 does not participate in defrosting when being in the defrosting operation and the temperature of the heating device 13 meets the preset conditions, so that the heating device 13 can be fully utilized for defrosting and is not frozen, and the air conditioning system 100 can normally operate.
It should be noted that the above explanation of the embodiments and advantageous effects of the control method and the control device 200 of the air conditioning system 100 is also applicable to the air conditioning system 100 of the present embodiment, and is not detailed herein to avoid redundancy.
Referring to fig. 9, an air conditioning system 300 according to an embodiment of the present invention includes a memory 210, a processor 230, and computer-executable instructions stored in the memory 210 and executable on the processor 230, where the processor 230 is configured to execute the computer-executable instructions to implement the steps of the control method according to any of the above embodiments.
In the air conditioning system 300, the heating device 13 participates in defrosting when being in the on state, does not participate in defrosting operation when being in the off state, and the heating device 13 does not participate in defrosting when the heating device 13 participates in defrosting operation and the temperature of the heating device 13 meets the preset conditions, so that the heating device 13 can be fully utilized for defrosting and is not frozen, and the air conditioning system 100 can normally operate.
For example, the processor 230 is configured to control the first valve 17 to open to conduct a pipe between the heating device 13 and the outdoor unit heat exchanger 15 when the heating device 13 is in the on state, so as to enable the heating device 13 to participate in the defrosting operation; and is used for controlling the first valve 17 to close under the condition that the heating device 13 is in a closed state so as to cut off a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 not to participate in defrosting operation; and is used for controlling the first valve 17 to close or ending the defrosting operation under the condition that the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset conditions.
In particular, the memory 210 and the processor 230 may be integrated in the controller, or in the control board, or in the control box, etc. The Processor 230 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), a Field-Programmable gate array (FPGA) or other Programmable logic device, discrete gate or transistor logic device, discrete hardware component, etc.
Embodiments of the present invention provide a non-transitory computer-readable storage medium containing computer-executable instructions which, when executed by one or more processors, cause the processors to perform the steps of the control method of any of the above embodiments.
For example, in the case where the program is executed by a processor, the steps of the following control method are implemented:
step S110: detecting the on-off state of the heating device 13 under the condition of acquiring a defrosting signal;
step S130: under the condition that the heating device 13 is in an open state, controlling the first valve 17 to be opened to conduct a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 to participate in defrosting operation;
step S150: under the condition that the heating device 13 is in a closed state, controlling the first valve 17 to be closed so as to cut off a pipeline between the heating device 13 and the outdoor unit heat exchanger 15, and further enabling the heating device 13 not to participate in defrosting operation;
step S170: and controlling the first valve 17 to be closed or ending the defrosting operation when the heating device 13 participates in the defrosting operation and the temperature of the heating device 13 meets the preset condition.
The computer-readable storage medium may be provided in the air conditioning system 300, or may be provided in a terminal such as a server, and the air conditioning system 300 may communicate with the terminal to obtain the corresponding program.
It is understood that the computer-readable storage medium may include: any entity or device capable of carrying a computer program, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-only Memory (ROM), Random Access Memory (RAM), software distribution medium, and the like. The computer program includes computer program code. The computer program code may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable storage medium may include: any entity or device capable of carrying computer program code, recording medium, U-disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), software distribution medium, and the like.
In some embodiments of the present invention, the controller is a single chip integrated with a processor, a memory, a communication module, and the like. The processor may refer to a processor included in the controller. The processor may be a Central Processing Unit (CPU), other general purpose processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic, discrete hardware components, etc.
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 specific logical functions or steps of the 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, such as 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, processing module-containing system, or other system that can fetch the instructions from the instruction execution system, apparatus, or device and execute the instructions.
It should be understood that portions of embodiments 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. For example, 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.
In the description of the specification, references to the terms "one embodiment", "some embodiments", "certain embodiments", "illustrative embodiments", "examples", "specific examples", 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, schematic representations of the above terms do not necessarily 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.
While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (13)

1. A control method for an air conditioning system, the air conditioning system including an outdoor unit and a heating device, the outdoor unit including an outdoor unit heat exchanger and a first valve, the heating device being connected to the outdoor unit heat exchanger through a first valve pipe, the control method comprising:
detecting the on-off state of the heating device under the condition of acquiring a defrosting signal;
under the condition that the heating device is in an opening state, controlling the first valve to be opened so as to conduct a pipeline between the heating device and the external machine heat exchanger, and enabling the heating device to participate in defrosting operation;
under the condition that the heating device is in a closed state, controlling the first valve to be closed so as to disconnect a pipeline between the heating device and the external machine heat exchanger, and further enabling the heating device not to participate in the defrosting operation;
and under the conditions that the heating device participates in the defrosting operation and the temperature of the heating device meets a preset condition, controlling the first valve to be closed or finishing the defrosting operation.
2. The control method of claim 1, wherein the air conditioning system comprises an indoor unit, the outdoor unit comprises a second valve, and the second valve connects the indoor unit and the outdoor unit heat exchanger, and the control method comprises:
detecting the current working mode of the indoor unit under the condition of acquiring the defrosting signal;
under the condition that the heating device is in a closed state or the mode of the heating device conflicts with that of the indoor unit, controlling the first valve to be closed so as to disconnect a pipeline between the heating device and the outdoor unit heat exchanger and further enable the heating device not to participate in the defrosting operation, and controlling the second valve to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger and further enable the indoor unit to participate in the defrosting operation;
under the condition that the heating device is in an opening state and the mode conflict does not exist between the heating device and the indoor unit, controlling the first valve to be opened so as to conduct a pipeline between the heating device and the outdoor unit heat exchanger, and enabling the heating device to participate in the defrosting operation;
and under the condition that the heating device participates in the defrosting operation and the temperature of the heating device meets the preset conditions, controlling the first valve to be closed, and controlling the second valve to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, so that the indoor unit participates in the defrosting operation.
3. The control method according to claim 2, characterized by comprising:
and under the condition that the heating device is in an opening state and the mode conflict does not exist between the heating device and the indoor unit, controlling the second valve to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, and further enabling the indoor unit to participate in the defrosting operation.
4. The control method according to any one of claims 1 to 3, wherein the temperature of the heating device includes an inlet water temperature and an outlet water temperature, the preset condition includes a defrosting temperature threshold,
the control method comprises the following steps:
and under the condition that the smaller temperature of the water inlet temperature and the water outlet temperature is not greater than the defrosting temperature threshold value, determining that the temperature of the heating device meets the preset condition.
5. The control method according to claim 4, characterized in that the defrosting temperature threshold has a value ranging from (0 ℃,10 ℃).
6. A control apparatus for an air conditioning system, the air conditioning system including an outdoor unit and a heating apparatus, the outdoor unit including an outdoor unit heat exchanger and a first valve, the heating apparatus being connected to the outdoor unit heat exchanger through the first valve pipe, the control apparatus comprising:
the acquiring module is used for acquiring a defrosting signal;
the detection module is used for detecting the on-off state of the heating device;
the control module is used for controlling the first valve to be opened under the condition that the heating device is in an opening state so as to conduct a pipeline between the heating device and the outer machine heat exchanger, and further enabling the heating device to participate in defrosting operation; and
the first valve is controlled to be closed under the condition that the heating device is in a closed state, so that a pipeline between the heating device and the outer machine heat exchanger is disconnected, and the heating device does not participate in the defrosting operation; and
and the first valve is controlled to be closed or the defrosting operation is finished under the conditions that the heating device participates in the defrosting operation and the temperature of the heating device meets the preset condition.
7. The control device of claim 6, wherein the air conditioning system comprises an indoor unit, the outdoor unit comprises a second valve, the second valve connects the indoor unit and the outdoor unit heat exchanger, the detection module is configured to detect a current operation mode of the indoor unit when the defrosting signal is obtained,
the control module is used for controlling the first valve to be closed to disconnect a pipeline between the heating device and the outer machine heat exchanger under the condition that the heating device is in a closed state or the heating device and the indoor machine have mode conflict, so that the heating device does not participate in the defrosting operation, and controlling the second valve to be opened to conduct the pipeline between the corresponding indoor machine and the outer machine heat exchanger, so that the indoor machine participates in the defrosting operation; and
the first valve is controlled to be opened to conduct a pipeline between the heating device and the outdoor unit heat exchanger under the condition that the heating device is in an opening state and the mode conflict does not exist between the heating device and the indoor unit, so that the heating device participates in the defrosting operation; and
and the second valve is controlled to be opened so as to conduct a pipeline between the corresponding indoor unit and the outdoor unit heat exchanger, and further the indoor unit participates in the defrosting operation.
8. The control device of claim 7, wherein the control module is configured to control the second valve to open to conduct a pipe between the corresponding indoor unit and the outdoor unit heat exchanger when the heating device is in the on state and there is no mode conflict between the heating device and the indoor unit, so that the indoor unit participates in the defrosting operation.
9. The control device of any one of claims 6 to 8, wherein the temperature of the heating device comprises an inlet water temperature and an outlet water temperature, the preset condition comprises a defrosting temperature threshold,
the control module is used for determining that the temperature of the heating device meets the preset condition under the condition that the smaller temperature of the water inlet temperature and the water outlet temperature is not greater than the defrosting temperature threshold value.
10. The control device according to claim 9, characterized in that said defrosting temperature threshold has a value ranging from (0 ℃,10 ℃).
11. An air conditioning system, characterized by comprising a control device according to any one of claims 6-10.
12. An air conditioning system, characterized in that the air conditioning system comprises a memory, a processor and computer executable instructions stored on the memory and executable on the processor for executing the computer executable instructions to implement the steps of the control method according to any one of claims 1 to 5.
13. A non-transitory computer-readable storage medium containing computer-executable instructions that, if executed by one or more processors, cause the processors to perform the steps of the control method of any one of claims 1-5.
CN202010512642.5A 2020-06-08 2020-06-08 Control method, control device, air conditioning system, and computer-readable storage medium Active CN111692705B (en)

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CN202010512642.5A CN111692705B (en) 2020-06-08 2020-06-08 Control method, control device, air conditioning system, and computer-readable storage medium
PCT/CN2021/089676 WO2021249047A1 (en) 2020-06-08 2021-04-25 Control method, control device, air conditioning system and computer-readable storage medium
EP21820958.3A EP4137751A4 (en) 2020-06-08 2021-04-25 Control method, control device, air conditioning system and computer-readable storage medium

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