CN114838457A - Control method, control system, electronic device and medium for preventing freezing of air conditioner - Google Patents
Control method, control system, electronic device and medium for preventing freezing of air conditioner Download PDFInfo
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- CN114838457A CN114838457A CN202210261020.9A CN202210261020A CN114838457A CN 114838457 A CN114838457 A CN 114838457A CN 202210261020 A CN202210261020 A CN 202210261020A CN 114838457 A CN114838457 A CN 114838457A
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- 230000008014 freezing Effects 0.000 title claims abstract description 66
- 238000007710 freezing Methods 0.000 title claims abstract description 66
- 238000000034 method Methods 0.000 title claims abstract description 45
- 239000003507 refrigerant Substances 0.000 claims abstract description 38
- 230000001960 triggered effect Effects 0.000 claims abstract description 18
- 238000004590 computer program Methods 0.000 claims description 12
- 238000004891 communication Methods 0.000 description 42
- 238000010586 diagram Methods 0.000 description 5
- 238000010079 rubber tapping Methods 0.000 description 3
- 238000007791 dehumidification Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000003287 optical effect Effects 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/43—Defrosting; Preventing freezing of indoor units
-
- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F11/89—Arrangement or mounting of control or safety devices
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/02—Ducting arrangements
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
-
- 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
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
- F25B41/42—Arrangements for diverging or converging flows, e.g. branch lines or junctions
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
-
- 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
- F24F2110/20—Humidity
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Physics & Mathematics (AREA)
- Signal Processing (AREA)
- Thermal Sciences (AREA)
- Fuzzy Systems (AREA)
- Mathematical Physics (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The invention provides a control method, a control system, electronic equipment and a medium for preventing an air conditioner from freezing, wherein the control method comprises the steps of obtaining the temperature of a coil and a preset temperature; judging whether the air conditioner triggers a freezing protection mode or not; adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner; the operation state comprises the following steps: a variable shunt state and a fixed shunt state; during variable shunting, a refrigerant in a heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; when the flow is fixedly divided, the flow dividing state of the refrigerant in the heat exchanger is fixed. The control method for preventing the freezing of the air conditioner comprises the steps of firstly obtaining the temperature of the coil pipe and the preset temperature, judging whether the air conditioner triggers a freezing protection mode or not based on the temperature of the coil pipe and the preset temperature, adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner, switching the air conditioner between a variable shunt state and a fixed shunt state, changing the shunt state of a heat exchanger, and enabling the air conditioner not to be stopped due to freezing protection in a certain low-temperature interval.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method, a control system, electronic equipment and a medium for preventing an air conditioner from freezing.
Background
Air conditioners are now essential appliances for homes and offices, and are used for a long time especially in summer and winter. The air conditioner can refrigerate in summer and heat in winter, can adjust the indoor temperature to be warm in winter and cool in summer, and provides a comfortable environment for users.
When the air conditioner operates in a low-temperature high-humidity environment, the air conditioner can be used for freezing protection for the protection inner opportunity to prevent the evaporator from frosting, but the freezing phenomenon is easily caused due to the fact that the air conditioner cannot timely reduce the frequency under the high-humidity environment, or the performance of the air conditioner is relatively good, and under the condition that the environment temperature is too low, the air conditioner operates at the lowest frequency to easily cause the inner machine coil to trigger a protection point, so that the air conditioner is stopped, the temperature regulation requirement cannot be met at the moment, and the user experience is influenced.
Disclosure of Invention
The embodiment of the invention provides a control method, a control system, electronic equipment and a medium for preventing an air conditioner from freezing, and solves the problem that the existing heat exchanger adopts a fixed shunting state, and the air conditioner is operated at the lowest frequency to prevent frosting in a low-temperature and high-humidity environment, so that the air conditioner is very easy to stop.
The embodiment of the invention provides a control method for preventing an air conditioner from freezing, which comprises the following steps:
acquiring the temperature of a coil and a preset temperature;
judging whether the air conditioner triggers a freezing protection mode or not based on the coil temperature and the preset temperature;
adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner;
wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed flow distribution state, the flow distribution state of the refrigerant in the heat exchanger is fixed.
According to an embodiment of the present invention, in the control method for preventing freezing of an air conditioner, the step of adjusting the operation state of the air conditioner based on the operation mode triggered by the air conditioner includes:
if the air conditioner is not in the freezing protection mode, adjusting the air conditioner to be in a fixed shunting state;
and if the air conditioner is in the freezing protection mode, adjusting the air conditioner to be in a variable shunt state.
According to an embodiment of the present invention, if the air conditioner is in the freeze protection mode, the step of adjusting the air conditioner to the variable split state includes:
acquiring the current shunting state of the air conditioner; the shunting state comprises: single-path shunting and multi-path shunting;
if the air conditioner is in the single-path shunt state, the multi-path shunt state is adjusted to work;
and if the air conditioner is in the multi-path shunting state, keeping the multi-path shunting to work.
According to the control method for preventing the air conditioner from freezing provided by one embodiment of the invention, the step of judging whether the air conditioner triggers the freezing protection mode or not based on the coil temperature and the preset temperature comprises the following steps:
if the temperature of the coil pipe is greater than or equal to the preset temperature, the air conditioner keeps the current working mode;
and if the temperature of the coil pipe is less than the preset temperature, the air conditioner executes a freezing protection mode.
According to an embodiment of the present invention, the control method for preventing freezing of an air conditioner further includes, after the step of adjusting the operation state of the air conditioner based on the operation mode triggered by the air conditioner:
acquiring a set temperature, acquiring the temperature of the coil again, and judging the relationship between the acquired temperature of the coil and the set temperature;
and adjusting the rotating speed of the indoor fan based on the relationship between the temperature of the coil pipe and the set temperature acquired again.
According to the control method for preventing the freezing of the air conditioner provided by one embodiment of the invention, the step of adjusting the rotating speed of the indoor fan based on the relationship between the coil temperature and the set temperature obtained again comprises the following steps:
if the temperature of the coil pipe obtained again is higher than the set temperature, the rotating speed of the indoor fan is reduced;
if the temperature of the coil pipe obtained again is lower than the set temperature, increasing the rotating speed of the indoor fan;
and if the temperature of the coil pipe obtained again is equal to the set temperature, controlling the indoor fan to keep the current state.
According to the control method for preventing the freezing of the air conditioner provided by one embodiment of the present invention, after the step of adjusting the rotation speed of the indoor fan based on the relationship between the re-acquired coil temperature and the set temperature, the method further includes:
and returning to the step of obtaining the set temperature, obtaining the temperature of the coil again, and judging the relationship between the obtained temperature of the coil and the set temperature again.
The present invention also provides a control system for preventing freezing of an air conditioner, comprising:
the acquisition module is used for acquiring the temperature of the coil pipe and the preset temperature;
the judging module is used for judging whether the air conditioner triggers a freezing protection mode or not based on the temperature of the coil pipe and the preset temperature;
the execution module is used for adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner;
wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed flow distribution state, the flow distribution state of the refrigerant in the heat exchanger is fixed.
The embodiment of the invention also provides electronic equipment which comprises a memory, a processor and a computer program which is stored on the memory and can run on the processor, wherein the processor realizes the control method for preventing the freezing of the air conditioner when executing the program.
Embodiments of the present invention also provide a non-transitory computer-readable storage medium having a computer program stored thereon, where the computer program, when executed by a processor, implements the control method for preventing freezing of an air conditioner.
According to the control method, the control system, the electronic equipment and the medium for preventing the air conditioner from freezing, the temperature of the coil pipe and the preset temperature are firstly obtained, whether the air conditioner triggers a freezing protection mode or not is judged based on the temperature of the coil pipe and the preset temperature, the running state of the air conditioner is adjusted based on the working mode triggered by the air conditioner, the air conditioner is switched between a variable shunting state and a fixed shunting state, the shunting state of the heat exchanger is changed, and the air conditioner cannot be stopped due to freezing protection in a certain low-temperature interval.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a variable flow divider according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;
fig. 3 is a flowchart illustrating a control method for preventing freezing of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic flow chart illustrating a process of preventing an air conditioner from freezing into a variable split state according to an embodiment of the present invention;
fig. 5 is a flowchart illustrating a control method for preventing freezing of an air conditioner according to another embodiment of the present invention;
fig. 6 is a schematic structural diagram of a control system for preventing freezing of an air conditioner according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
reference numerals are as follows:
1. a first shunt line; 10. a one-way valve; 2. a second shunt line; 3. a diverter valve; 31. a first communication port; 32. a second communication port; 33. a third communication port; 34. a fourth communication port; 4. a heat exchange line; 610. an acquisition module; 620. a judgment module; 630. an execution module; 710. a processor; 720. a communication interface; 730. a memory; 740. a communication bus.
Detailed Description
The embodiments of the present invention will be described in further detail with reference to the drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.
In the description of the embodiments 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.
In the description of the embodiments of the present invention, it should be noted that the terms "connected" and "connected" are to be interpreted broadly, and may be, for example, a fixed connection, a detachable connection, or an integral connection, unless explicitly stated or limited otherwise; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the embodiments of the present invention can be understood in specific cases by those of ordinary skill in the art.
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 an embodiment 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.
The invention provides a control method for preventing an air conditioner from freezing, wherein the air conditioner can be a wall-mounted air conditioner, a cabinet air conditioner, a window air conditioner, a ceiling air conditioner and the like.
As shown in fig. 1 and 2, the indoor heat exchanger or the outdoor heat exchanger of the air conditioner is provided with a variable flow dividing device, and the indoor heat exchanger and the outdoor heat exchanger can be provided with the variable flow dividing device at the same time, and the variable flow dividing device comprises: the system comprises a reversing valve 3, a first shunt pipeline 1, a second shunt pipeline 2 and at least two heat exchange pipelines 4. The first tapping line 1 is connected to the second tapping line 2 via at least two heat exchange lines 4. The first branch pipeline 1 and the second branch pipeline 2 are respectively provided with a main pipeline and a plurality of branch pipelines, and a one-way valve 10 can be arranged in the middle branch pipeline according to requirements.
The change valve 3 is a two-position four-way change valve, and is provided with a first communicating port 31, a second communicating port 32, a third communicating port 33 and a fourth communicating port 34, and the change valve 3 has a first station and a second station. The first communication port 31 is connected to the refrigerant inlet, and the third communication port 33 is connected to the refrigerant outlet.
The air conditioner has a variable split state and a fixed split state. Under the condition of variable shunt state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunt state according to the working mode of the air conditioner. Under the condition of fixed flow dividing state, the flow dividing state of the refrigerant in the outdoor heat exchanger of the air conditioner is fixed.
The shunting state is divided into single-path shunting and multi-path shunting, and under the condition of multi-path shunting, refrigerant in the outdoor heat exchanger of the air conditioner is subjected to multi-path shunting to work. Under the condition of single-path flow division, the refrigerant in the outdoor heat exchanger of the air conditioner works in a single path. That is, the air conditioner switches between the one-way split and the multi-way split in the variable split state, and the air conditioner operates in the fixed-position one-way split or multi-way split in the fixed split state.
When the multi-path flow is divided, the change valve 3 is in the first position, the first communication port 31 is communicated with the second communication port 32, and the third communication port 33 is communicated with the fourth communication port 34. At this time, the second communication port 32 communicates with the first branch line 1, and the fourth communication port 34 communicates with the second branch line 2. The refrigerant of the refrigerant inlet enters from the first shunting pipeline 1, is shunted by the branch pipelines of the first shunting pipeline 1, respectively enters each heat exchange pipeline 4 to exchange heat with the indoor air, enters the main pipeline of the second shunting pipeline 2 by the branch pipelines, finally passes through the fourth communicating port 34 and the third communicating port 33, and is discharged from the refrigerant outlet, so that the heat exchange of a plurality of pipelines is realized.
When the single-path flow is branched, the selector valve 3 is in the second position, the first communication port 31 communicates with the fourth communication port 34, and the third communication port 33 communicates with the second communication port 32. At this time, the second communication port 32 communicates with the second branch line 2, and the fourth communication port 34 communicates with the first branch line 1. The refrigerant at the refrigerant inlet enters from the second shunting pipeline 2, and because the check valves 10 are arranged in part of pipelines in the first shunting pipeline 1, and under the limitation of the check valves, the refrigerant can only be subjected to heat exchange and discharged from part of the heat exchange pipelines 4, and at the moment, the heat exchange pipelines can be reduced.
In this embodiment, taking two heat exchange pipelines 4 as an example, the two heat exchange pipelines are respectively a first heat exchange pipeline and a second heat exchange pipeline. First reposition of redundant personnel pipeline 1 and second reposition of redundant personnel pipeline 2 all are equipped with a trunk line and two spinal branchs way. A one-way valve 10 is arranged in one branch pipeline of the first shunt pipeline 1. It is assumed that the non-return valve 10 is arranged in only one of the conduits of the first tapping line 1
When the multi-path flow is divided, the change valve 3 is in the first position, the first communication port 31 is communicated with the second communication port 32, and the third communication port 33 is communicated with the fourth communication port 34. At this time, the second communication port 32 communicates with the first branch line 1, and the fourth communication port 34 communicates with the second branch line 2. The refrigerant at the refrigerant inlet enters from the first shunting pipeline 1, is shunted by the branch pipeline of the first shunting pipeline 1, respectively enters the first heat exchange pipeline and the second heat exchange pipeline to exchange heat with the indoor air, enters the main pipeline of the second shunting pipeline 2 from the branch pipeline, finally passes through the fourth communicating port 34 and the third communicating port 33, and is discharged from the refrigerant outlet, so that the simultaneous heat exchange of the two pipelines is realized.
When the one-way flow is branched, the selector valve 3 is in the second position, the first communication port 31 communicates with the fourth communication port 34, and the third communication port 33 communicates with the second communication port 32. At this time, the second communication port 32 communicates with the second branch line 2, and the fourth communication port 34 communicates with the first branch line 1. The refrigerant at the refrigerant inlet enters from the second shunting pipeline 2, and because the check valve 10 is arranged in the branch pipeline in the first shunting pipeline 1, the refrigerant can only exchange heat in the first heat exchange pipeline 4 and be discharged under the limitation of the check valve, and at the moment, the heat exchange is carried out only through one heat exchange pipeline 4.
As shown in fig. 3, the control method for preventing freezing of the air conditioner includes the steps of:
step S110: and acquiring the temperature of the coil and a preset temperature.
Under the low-temperature and high-humidity environment, if the air conditioner starts a refrigeration or dehumidification mode, the air conditioner can acquire the indoor coil temperature and the preset temperature through the sensor. The preset temperature is a critical temperature for triggering the freeze protection mode, and the preset temperature can be adjusted according to the operating condition, for example, the preset temperature can be 1 to 8 ℃.
Step S120: and judging whether the air conditioner triggers a freezing protection mode or not based on the temperature of the coil pipe and the preset temperature.
After the coil pipe temperature and the preset temperature are obtained, whether the air conditioner triggers the freezing protection mode or not is judged based on the coil pipe temperature and the preset temperature.
If the temperature of the coil pipe is greater than or equal to the preset temperature, the air conditioner keeps the current working mode; and if the temperature of the coil is less than the preset temperature, the air conditioner executes a freezing protection mode. For example, when the preset temperature is 5 degrees celsius, if the temperature of the coil is 6 degrees celsius, the air conditioner keeps the current working mode without entering the freeze protection mode, and if the temperature of the coil is 4 degrees celsius, the air conditioner executes the freeze protection mode.
Step S130: and adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner.
And adjusting the running state of the air conditioner based on whether the air conditioner triggers the freezing protection mode or not, and controlling the air conditioner to switch between a variable shunting state and a fixed shunting state. Under the condition of variable shunt state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunt state according to the working mode of the air conditioner; under the condition of fixed flow dividing state, the flow dividing state of the refrigerant in the heat exchanger is fixed.
Specifically, if the air conditioner does not trigger the freeze protection mode and is not in the freeze protection mode, which indicates that the air conditioner can normally work in the current shunting state, the air conditioner is controlled to be in the fixed shunting state.
If the air conditioner triggers the freezing protection mode, the air conditioner is in the freezing protection mode, and the air conditioner can not normally work in the current shunting state, the air conditioner is controlled to be in the variable shunting state, and the shunting state is adjusted through the reversing valve. For example, when the indoor heat exchanger and/or the outdoor heat exchanger of the air conditioner is in a one-way shunting state, because the pressure in the system is relatively high during one-way shunting, the indoor heat exchanger and/or the outdoor heat exchanger of the air conditioner is controlled to be switched into multi-way shunting for heat exchange, so that the pressure in the indoor heat exchanger and the pressure in the outdoor heat exchanger are reduced, the temperature (condenser) in the outdoor heat exchanger is reduced, and the temperature of the indoor heat exchanger (evaporator) is increased.
The control method for preventing the freezing of the air conditioner comprises the steps of firstly obtaining the temperature of the coil pipe and the preset temperature, judging whether the air conditioner triggers a freezing protection mode or not based on the temperature of the coil pipe and the preset temperature, adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner, switching the air conditioner between a variable shunt state and a fixed shunt state, changing the shunt state of a heat exchanger, and enabling the air conditioner not to be stopped due to freezing protection in a certain low-temperature interval.
After the step of adjusting the air conditioner to be in the variable split state when the air conditioner triggers the freeze protection mode and is in the freeze protection mode, as shown in fig. 4, the method further includes:
step S410: acquiring the current shunting state of the air conditioner; the shunting state comprises the following steps: single-pass shunting and multi-pass shunting.
And acquiring the current shunting state of the air conditioner. The shunting state mainly comprises: single-pass shunting and multi-pass shunting. Three or four heat exchange pipelines can be arranged according to the requirement, so that the shunting state can also be set to be a partially shunted intermediate state, and the selection can be carried out according to the requirement in the operation process.
Step S420: if the air conditioner is in single-path shunting, the air conditioner is adjusted to multi-path shunting to work.
In the process of refrigeration or dehumidification at the air conditioner, because the pressure in the pipeline has been increased in the reposition of redundant personnel of one way, if judge and know that the air conditioner is in the reposition of redundant personnel of one way, because normal work can't be guaranteed to current reposition of redundant personnel state, then adjust to the reposition of redundant personnel of multichannel and carry out work, utilize a plurality of heat transfer pipelines to carry out the heat transfer, realize the heat transfer by many pipelines.
If the air conditioner is also provided with a partial shunting intermediate device, the state of single-path shunting can be adjusted to be a partial shunting state, and partial heat exchange pipelines are utilized for heat exchange.
Step S430: if the air conditioner is in multi-path shunting, the multi-path shunting is kept to work.
If the air conditioner is in multi-path shunting, the pressure in the pipeline can be reduced due to the multi-path shunting, and the pressure cannot be adjusted through shunting at the moment, so that the multi-path shunting is kept to work.
In order to realize the fine temperature control after adjusting the operation state of the air conditioner, as shown in fig. 5, step S130: based on the working mode triggered by the air conditioner, the step of adjusting the running state of the air conditioner further comprises the following steps:
step S140: and acquiring the set temperature, acquiring the temperature of the coil again, and judging the relationship between the acquired temperature of the coil and the set temperature.
After the running state of the air conditioner is adjusted, the air conditioner acquires the temperature of the coil pipe again through the sensor, and the relationship between the acquired temperature of the coil pipe and the set temperature is judged.
Step S150: and adjusting the rotating speed of the indoor fan based on the relationship between the temperature of the coil pipe and the set temperature acquired again.
If the temperature of the coil pipe obtained again is higher than the set temperature, the rotating speed of the indoor fan is reduced; and if the temperature of the coil pipe obtained again is less than the set temperature, increasing the rotating speed of the indoor fan. And if the temperature of the coil pipe obtained again is equal to the set temperature, controlling the indoor fan to keep the current state.
For example, when the set temperature is 10 degrees celsius, if the coil temperature obtained again is 11 degrees celsius, which indicates that the current temperature is high and the air volume is too large, the air supply temperature is too high, and then the rotation speed of the indoor fan is reduced. If the temperature of the coil pipe obtained again is 8 ℃, the current temperature is low, and the air supply temperature is too low due to too small air quantity, so that the rotating speed of the indoor fan is increased. And if the temperature of the coil pipe obtained again is 10 ℃, controlling the indoor fan to keep the current state.
After the rotating speed of the indoor fan is adjusted, in order to keep the air supply temperature constant, the steps of obtaining the set temperature, obtaining the coil temperature again, judging the relationship between the coil temperature obtained again and the set temperature, and adjusting the rotating speed of the indoor fan again based on the relationship between the coil temperature obtained again and the set temperature.
The control system for preventing freezing of an air conditioner according to an embodiment of the present invention is described below, and the control system for preventing freezing of an air conditioner described below and the control method described above may be referred to in correspondence with each other.
As shown in fig. 6, the control system for preventing freezing of the air conditioner includes: an acquisition module 610, a determination module 620 and an execution module 630.
The acquiring module 610 is configured to acquire a coil temperature and a preset temperature; the judging module 620 is configured to judge whether the air conditioner triggers the freezing protection mode based on the coil temperature and the preset temperature; the execution module 630 is configured to adjust an operation state of the air conditioner based on a working mode triggered by the air conditioner; wherein, the running state includes: a variable shunt state and a fixed shunt state; under the condition of variable shunt state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunt state according to the working mode of the air conditioner; under the condition of fixed flow dividing state, the flow dividing state of the refrigerant in the heat exchanger is fixed.
Fig. 7 illustrates a physical structure diagram of an electronic device, and as shown in fig. 7, the electronic device may include: a processor (processor)710, a communication Interface (Communications Interface)720, a memory (memory)730, and a communication bus 740, wherein the processor 710, the communication Interface 720, and the memory 730 communicate with each other via the communication bus 740. Processor 710 may call logic instructions in memory 730 to perform the control method comprising: acquiring the temperature of a coil and a preset temperature; judging whether the air conditioner triggers a freezing protection mode or not based on the coil temperature and the preset temperature; adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner; wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed flow distribution state, the flow distribution state of the refrigerant in the heat exchanger is fixed.
It should be noted that, when being implemented specifically, the electronic device in this embodiment may be a server, a PC, or other devices, as long as the structure includes the processor 710, the communication interface 720, the memory 730, and the communication bus 740 shown in fig. 7, where the processor 710, the communication interface 720, and the memory 730 complete mutual communication through the communication bus 740, and the processor 710 may call the logic instructions in the memory 730 to execute the above method. The embodiment does not limit the specific implementation form of the electronic device.
In addition, the logic instructions in the memory 730 can be implemented in the form of software functional units and stored in a computer readable storage medium when the software functional units are sold or used as independent products. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes.
Further, an embodiment of the present invention discloses a computer program product, the computer program product comprising a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions, when the program instructions are executed by a computer, the computer being capable of executing the control method provided by the above method embodiments, the control method comprising: acquiring the temperature of a coil and a preset temperature; judging whether the air conditioner triggers a freezing protection mode or not based on the coil temperature and the preset temperature; adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner; wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed flow distribution state, the flow distribution state of the refrigerant in the heat exchanger is fixed.
In another aspect, an embodiment of the present invention further provides a non-transitory computer-readable storage medium, on which a computer program is stored, where the computer program is implemented to perform the control method provided in the foregoing embodiments when executed by a processor, where the control method includes: acquiring the temperature of a coil and a preset temperature; judging whether the air conditioner triggers a freezing protection mode or not based on the coil temperature and the preset temperature; adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner; wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed flow distribution state, the flow distribution state of the refrigerant in the heat exchanger is fixed.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
The above embodiments are merely illustrative of the present invention and are not to be construed as limiting the invention. Although the present invention has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that various combinations, modifications or equivalents may be made to the technical solution of the present invention without departing from the spirit and scope of the technical solution of the present invention, and the technical solution of the present invention is covered by the claims of the present invention.
Claims (10)
1. A control method for preventing freezing of an air conditioner is characterized by comprising the following steps:
acquiring the temperature of a coil and a preset temperature;
judging whether the air conditioner triggers a freezing protection mode or not based on the coil temperature and the preset temperature;
adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner;
wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed flow distribution state, the flow distribution state of the refrigerant in the heat exchanger is fixed.
2. The control method for preventing freezing of an air conditioner according to claim 1, wherein the step of adjusting the operation state of the air conditioner based on the operation mode triggered by the air conditioner comprises:
if the air conditioner is not in the freezing protection mode, adjusting the air conditioner to be in a fixed shunting state;
and if the air conditioner is in the freezing protection mode, adjusting the air conditioner to be in a variable shunt state.
3. The control method for preventing the air conditioner from freezing according to claim 2, wherein the step of adjusting the air conditioner to the variable split state if the air conditioner is in the freeze protection mode is followed by:
acquiring the current shunting state of the air conditioner; the shunting state comprises: single-path shunting and multi-path shunting;
if the air conditioner is in the single-path shunt state, the multi-path shunt state is adjusted to work;
and if the air conditioner is in the multi-path shunting state, keeping the multi-path shunting to work.
4. The control method for preventing the freezing of the air conditioner according to any one of the claims 1 to 3, wherein the step of determining whether the air conditioner triggers the freezing protection mode based on the coil temperature and the preset temperature comprises:
if the temperature of the coil pipe is greater than or equal to the preset temperature, the air conditioner keeps the current working mode;
and if the temperature of the coil pipe is less than the preset temperature, the air conditioner executes a freezing protection mode.
5. The control method for preventing the freezing of the air conditioner according to any one of claims 1 to 3, wherein the step of adjusting the operation state of the air conditioner based on the operation mode triggered by the air conditioner further comprises the following steps:
acquiring a set temperature, acquiring the temperature of the coil again, and judging the relationship between the acquired temperature of the coil and the set temperature;
and adjusting the rotating speed of the indoor fan based on the relationship between the temperature of the coil pipe and the set temperature acquired again.
6. The control method for preventing freezing of an air conditioner according to claim 5, wherein the step of adjusting the rotation speed of the indoor fan based on the relationship between the coil temperature and the set temperature obtained again includes:
if the temperature of the coil pipe obtained again is higher than the set temperature, the rotating speed of the indoor fan is reduced;
if the temperature of the coil pipe obtained again is lower than the set temperature, increasing the rotating speed of the indoor fan;
and if the temperature of the coil pipe obtained again is equal to the set temperature, controlling the indoor fan to keep the current state.
7. The control method for preventing freezing of an air conditioner according to claim 5, wherein the step of adjusting the rotation speed of the indoor fan based on the relationship between the re-acquired coil temperature and the set temperature further includes, after the step of:
and returning to the step of obtaining the set temperature, obtaining the temperature of the coil again, and judging the relationship between the obtained temperature of the coil and the set temperature again.
8. A control system for preventing freezing of an air conditioner, comprising:
the acquisition module is used for acquiring the temperature of the coil pipe and the preset temperature;
the judging module is used for judging whether the air conditioner triggers a freezing protection mode or not based on the temperature of the coil pipe and the preset temperature;
the execution module is used for adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner;
wherein the operating state comprises: a variable shunt state and a fixed shunt state; under the condition of the variable shunting state, the refrigerant in the heat exchanger of the air conditioner adjusts the shunting state according to the working mode of the air conditioner; and under the condition of the fixed shunting state, the shunting state of the refrigerant in the heat exchanger is fixed.
9. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the control method for preventing freezing of an air conditioner according to any one of claims 1 to 7 when executing the program.
10. A non-transitory computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements the control method for preventing freezing of an air conditioner according to any one of claims 1 to 7.
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