CN114838457B - Control method, control system, electronic equipment and medium for preventing air conditioner from freezing - Google Patents
Control method, control system, electronic equipment and medium for preventing air conditioner from freezing Download PDFInfo
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- CN114838457B CN114838457B CN202210261020.9A CN202210261020A CN114838457B CN 114838457 B CN114838457 B CN 114838457B CN 202210261020 A CN202210261020 A CN 202210261020A CN 114838457 B CN114838457 B CN 114838457B
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- 238000007710 freezing Methods 0.000 title claims abstract description 62
- 230000008014 freezing Effects 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 41
- 239000003507 refrigerant Substances 0.000 claims abstract description 30
- 230000001960 triggered effect Effects 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000004891 communication Methods 0.000 claims description 68
- 238000004590 computer program Methods 0.000 claims description 8
- 230000001276 controlling effect Effects 0.000 description 4
- 238000004378 air conditioning Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000001105 regulatory effect Effects 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
- 238000006467 substitution reaction Methods 0.000 description 2
- 206010060904 Freezing phenomenon Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—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
-
- 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
-
- 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
-
- 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
Abstract
The invention provides a control method, a control system, electronic equipment and a medium for preventing an air conditioner from freezing, which comprise the steps of obtaining the temperature of a coil and the preset temperature; judging whether the air conditioner triggers a freezing protection mode or not; based on the working mode triggered by the air conditioner, adjusting the running state of the air conditioner; the running state comprises: a variable shunt state and a fixed shunt state; when the air conditioner is in variable split flow, the split flow state of the air conditioner is adjusted by cooling in a heat exchanger of the air conditioner according to the working mode of the air conditioner; when the split flow is fixed, the split flow state of the refrigerant in the heat exchanger is fixed. According to the control method for preventing the air conditioner from freezing, the coil temperature and the preset temperature are firstly obtained, whether the air conditioner triggers a freezing protection mode is judged based on the coil temperature 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 split state and a fixed split state, the split state of the heat exchanger is changed, and the air conditioner cannot stop in a certain low-temperature interval due to freezing protection.
Description
Technical Field
The present invention relates to the field of air conditioning technologies, and in particular, to a control method, a control system, an electronic device, and a medium for preventing freezing of an air conditioner.
Background
Air conditioning is now a necessary electrical appliance for home and office use, and particularly in summer and winter, air conditioning is used for a long time. The air conditioner can cool 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 freeze and protect the inner machine coil, so that the evaporator is prevented from frosting, but the freezing phenomenon is extremely easy to occur due to the fact that the air conditioner is not in time in a frequency-reducing mode in 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, the inner machine coil is extremely easy to trigger a protection point, the air conditioner is stopped, the temperature requirement cannot be met, 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, which solve the problem that the air conditioner is easy to stop because the air conditioner is operated at the lowest frequency in a low-temperature high-humidity environment in order to prevent frosting by adopting a fixed split flow state in the existing heat exchanger.
The embodiment of the invention provides a control method for preventing an air conditioner from freezing, which comprises the following steps:
obtaining the temperature of a coil pipe 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;
based on the working mode triggered by the air conditioner, adjusting the running state of the air conditioner;
wherein the operating state includes: a variable shunt state and a fixed shunt state; in the case of the variable split state, cooling in a heat exchanger of the air conditioner adjusts the split state according to the working mode of the air conditioner; and under the condition of the fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
According to an embodiment of the present invention, 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, the air conditioner is adjusted to be in a fixed split state;
and if the air conditioner is in the freezing protection mode, adjusting the air conditioner to be in a variable split state.
According to an embodiment of the present invention, in the method for controlling an air conditioner to prevent freezing, if the air conditioner is in a freezing protection mode, the step of adjusting the air conditioner to a variable bypass state includes:
acquiring the current split state of the air conditioner; the shunt state includes: single-path split flow and multi-path split flow;
if the air conditioner is in the single-path split, adjusting the air conditioner to work for the multi-path split;
and if the air conditioner is in the multi-way split, keeping the multi-way split to work.
According to an embodiment of the present invention, the step of determining whether the air conditioner triggers a freeze protection mode based on the coil temperature and the preset temperature includes:
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 smaller than the preset temperature, the air conditioner executes a freezing protection mode.
According to the control method for preventing the air conditioner from freezing provided by the embodiment of the invention, the step of adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner further comprises the following steps:
acquiring a set temperature, acquiring a coil temperature again, and judging the relationship between the acquired coil temperature and the set temperature;
and adjusting the rotating speed of the indoor fan based on the relationship between the acquired coil temperature and the set temperature.
According to an embodiment of the present invention, in the control method for preventing freezing of an air conditioner, 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 acquired coil temperature is greater than the set temperature, reducing the rotating speed of the indoor fan;
if the acquired coil temperature is smaller than the set temperature, increasing the rotating speed of the indoor fan;
and if the acquired coil temperature is equal to the set temperature, controlling the indoor fan to keep the current state.
According to the control method for preventing the air conditioner from freezing provided by the embodiment of the invention, the step of adjusting the rotating speed of the indoor fan based on the relationship between the acquired coil temperature and the set temperature further comprises the following steps:
and returning to the step of acquiring the set temperature and acquiring the coil temperature again, and judging the relationship between the coil temperature acquired again and the set temperature.
The invention also provides a control system for preventing the air conditioner from freezing, which comprises:
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 coil temperature 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 includes: a variable shunt state and a fixed shunt state; in the case of the variable split state, cooling in a heat exchanger of the air conditioner adjusts the split state according to the working mode of the air conditioner; and under the condition of the fixed split state, the split 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 stored on the memory and capable of running on the processor, wherein the control method for preventing the air conditioner from freezing is realized when the processor executes the program.
The embodiment of the invention also provides a non-transitory computer readable storage medium, on which a computer program is stored, which when executed by a processor implements the control method for preventing the air conditioner from freezing.
According to the control method, the control system, the electronic equipment and the medium for preventing the air conditioner from freezing, the coil temperature and the preset temperature are firstly obtained, whether the air conditioner triggers a freezing protection mode is judged based on the coil temperature 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 in a certain low-temperature range due to freezing protection.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic view of a variable flow diversion device according to an embodiment of the present invention;
FIG. 2 is a schematic view of a heat exchanger according to an embodiment of the present invention;
FIG. 3 is a flow chart of 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 of an embodiment of the present invention for preventing an air conditioner from freezing into a variable diversion state;
fig. 5 is a flowchart of 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:
1. a first shunt line; 10. a one-way valve; 2. a second shunt line; 3. a reversing 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 pipeline; 610. an acquisition module; 620. a judging module; 630. an execution module; 710. a processor; 720. a communication interface; 730. a memory; 740. a communication bus.
Detailed Description
Embodiments of the present invention are described in further detail below with reference to the accompanying drawings and examples. The following examples are illustrative of the invention but are not intended to limit the scope of the invention.
In the description of embodiments of the present invention, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In describing embodiments of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "coupled," "coupled," and "connected" should be construed broadly, and may be either a fixed connection, a removable connection, or an integral connection, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the above terms in embodiments of the present invention will be understood in detail by those of ordinary skill in the art.
In the description of the present specification, a description referring to terms "one embodiment," "some embodiments," "examples," "specific examples," or "some examples," etc., means 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 embodiments of the present invention. In this specification, schematic representations of the above terms are not necessarily directed 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, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction.
The invention provides a control method for preventing an air conditioner from freezing, and the air conditioner can be a wall-mounted air conditioner, a vertical 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 diversion device, and the indoor heat exchanger and the outdoor heat exchanger can be simultaneously provided with the variable flow diversion device, and the variable flow diversion device comprises: the reversing valve 3, the first diversion pipeline 1, the second diversion pipeline 2 and at least two heat exchange pipelines 4. The first shunt line 1 is connected to the second shunt line 2 via at least two heat exchange lines 4. The first diversion pipeline 1 and the second diversion pipeline 2 are respectively provided with a main pipeline and a plurality of branch pipelines, and one-way valves 10 can be arranged in part of the branch pipelines according to the requirement.
The reversing valve 3 is a two-position four-way reversing valve, and is provided with a first communication port 31, a second communication port 32, a third communication port 33 and a fourth communication port 34, and the reversing valve 3 is provided with 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. In the case of a variable split state, the split state is adjusted by cooling in the heat exchanger of the air conditioner according to the operation mode of the air conditioner. In the case of the fixed split state, the split state of the refrigerant in the outdoor heat exchanger of the air conditioner is fixed.
The split state is divided into single-path split and multi-path split, and refrigerant multi-path split in the outdoor heat exchanger of the air conditioner works under the condition of multi-path split. Under the condition of single-way split flow, the refrigerant in the outdoor heat exchanger of the air conditioner works in a single way. That is, in the variable split state, the air conditioner is switched between the single split and the multi-split, and in the fixed split state, the air conditioner is fixed to operate in the single split or the multi-split.
When the multi-way flow is split, the reversing valve 3 is positioned at a first station, 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 shunt line 1, and the fourth communication port 34 communicates with the second shunt line 2. The refrigerant of the refrigerant inlet enters from the first diversion pipeline 1, is diverted in branch pipelines of the first diversion pipeline 1, respectively enters into each heat exchange pipeline 4 to exchange heat with indoor air, enters into a main pipeline of the refrigerant through branch pipelines of the second diversion pipeline 2, finally passes through the fourth communication port 34 and the third communication port 33, is discharged from a refrigerant outlet, and realizes the heat exchange of a plurality of pipelines.
When the single-way flow is split, the reversing valve 3 is at the second station, the first communication port 31 is communicated with the fourth communication port 34, and the third communication port 33 is communicated with the second communication port 32. At this time, the second communication port 32 communicates with the second split line 2, and the fourth communication port 34 communicates with the first split line 1. The refrigerant of the refrigerant inlet enters from the second diversion pipeline 2, and the one-way valve 10 is arranged in part of the pipelines in the first diversion pipeline 1, so that the refrigerant can only exchange heat and discharge in part of the heat exchange pipeline 4 under the limitation of the one-way valve, and the heat exchange pipeline can be reduced at the moment.
In this embodiment, two heat exchange pipelines 4 are taken as an example, and are a first heat exchange pipeline and a second heat exchange pipeline respectively. The first shunt pipeline 1 and the second shunt pipeline 2 are respectively provided with a main pipeline and two branch pipelines. One branch pipe in the first diversion pipeline 1 is provided with a one-way valve 10. It is assumed that the non-return valve 10 is provided in only one of the branch lines of the first shunt line 1.
When the multi-way flow is split, the reversing valve 3 is positioned at a first station, 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 shunt line 1, and the fourth communication port 34 communicates with the second shunt line 2. The refrigerant of the refrigerant inlet enters from the first diversion pipeline 1, is diverted in the branch pipeline of the first diversion pipeline 1, respectively enters into the first heat exchange pipeline and the second heat exchange pipeline to exchange heat with indoor air, enters into the main pipeline of the refrigerant through the branch pipeline of the second diversion pipeline 2, finally passes through the fourth communication port 34 and the third communication port 33, and is discharged from the refrigerant outlet, so that the simultaneous heat exchange of the two pipelines is realized.
When the single-way flow is split, the reversing valve 3 is at the second station, the first communication port 31 is communicated with the fourth communication port 34, and the third communication port 33 is communicated with the second communication port 32. At this time, the second communication port 32 communicates with the second split line 2, and the fourth communication port 34 communicates with the first split line 1. The refrigerant of the refrigerant inlet enters from the second diversion pipeline 2, and the one-way valve 10 is arranged in the branch pipeline in the first diversion pipeline 1, so that the refrigerant can only exchange heat and discharge in the first heat exchange pipeline 4 under the limitation of the one-way valve, and only exchanges heat through one heat exchange pipeline 4 at the moment.
As shown in fig. 3, the control method for preventing freezing of the air conditioner includes the steps of:
step S110: and obtaining the coil temperature and the preset temperature.
In a low-temperature 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 can be adjusted according to the running condition, for example, the preset temperature can be 1-8 ℃.
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 temperature and the preset temperature are obtained, judging whether the air conditioner triggers a freezing protection mode or not based on the coil 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 pipe is smaller than the preset temperature, the air conditioner executes a freezing protection mode. For example, when the preset temperature is 5 degrees celsius, if the coil temperature is 6 degrees celsius, the air conditioner keeps the current working mode without entering the freeze protection mode, and if the coil temperature 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.
Based on whether the air conditioner triggers a freezing protection mode, the running state of the air conditioner is adjusted, and the air conditioner is controlled to be switched between a variable split state and a fixed split state. In the case of a variable split state, the split state is adjusted by cooling in a heat exchanger of the air conditioner according to the working mode of the air conditioner; in the case of the fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
Specifically, if the air conditioner does not trigger the freezing protection mode and is not in the freezing protection mode, which means that the air conditioner can normally work in the current split state, the air conditioner is controlled to be in a fixed split state.
If the air conditioner triggers the freezing protection mode and is in the freezing protection mode, the air conditioner is controlled to be in a variable shunting state and the shunting state is adjusted through the reversing valve when the air conditioner is in the freezing protection mode and the air conditioner cannot normally work in the current shunting state. For example, when the indoor heat exchanger and/or the outdoor heat exchanger of the air conditioner are/is in the state of single-path split, the pressure in the system is relatively large during single-path split, and the indoor heat exchanger and/or the outdoor heat exchanger of the air conditioner are controlled to be switched into multi-path split to exchange heat, so that the pressure in the indoor heat exchanger and the outdoor heat exchanger is reduced, the temperature (condenser) in the outdoor heat exchanger is reduced, and the temperature of the indoor heat exchanger (evaporator) is raised.
According to the control method for preventing the air conditioner from freezing, the coil temperature and the preset temperature are firstly obtained, whether the air conditioner triggers a freezing protection mode is judged based on the coil temperature 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 split state and a fixed split state, the split state of the heat exchanger is changed, and the air conditioner cannot stop in a certain low-temperature interval due to freezing protection.
After the step of adjusting the air conditioner to the variable bypass state in the case where 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 split state of the air conditioner; the shunt state includes: single-pass splitting and multi-pass splitting.
And acquiring the current split state of the air conditioner. The shunt state mainly comprises: single-pass splitting and multi-pass splitting. Three or four heat exchange pipelines can be arranged according to the needs, so that the split state can be also provided with the intermediate state of partial split so as to ensure that the selection is carried out according to the needs in the operation process.
Step S420: if the air conditioner is in single-path split, the air conditioner is adjusted to be in multi-path split for working.
In the process that the air conditioner is in refrigeration or dehumidification, the pressure in the pipeline is increased due to single-way diversion, if the air conditioner is judged to be in single-way diversion, the current diversion state cannot ensure normal operation, the air conditioner is adjusted to be in multi-way diversion for operation, and a plurality of heat exchange pipelines are utilized for heat exchange, so that the heat exchange of a plurality of pipelines is realized.
If the air conditioner is also provided with a partial split intermediate device, the air conditioner can be adjusted from a single-path split state to a partial split state, and heat exchange is performed by utilizing a partial heat exchange pipeline.
Step S430: if the air conditioner is in multi-way split, keeping the multi-way split to work.
If the air conditioner is already in the multi-way split, the pressure in the pipeline can be reduced due to the multi-way split, and the pressure cannot be regulated through the split at the moment, so that the multi-way split is kept to work.
In order to achieve 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 coil temperature again, and judging the relationship between the acquired coil temperature and the set temperature.
After the running state of the air conditioner is adjusted, the air conditioner acquires the coil temperature again through the sensor, and the relationship between the acquired coil temperature and the set temperature is judged.
Step S150: and adjusting the rotating speed of the indoor fan based on the relationship between the acquired coil temperature and the set temperature.
If the acquired coil temperature is greater than the set temperature, reducing the rotating speed of the indoor fan; and if the acquired coil temperature is smaller than the set temperature, increasing the rotating speed of the indoor fan. And if the acquired coil temperature is equal to the set temperature, controlling the indoor fan to keep the current state.
For example, when the set temperature is 10 ℃, if the acquired coil temperature is 11 ℃, which means that the current temperature is higher, the air quantity is too large, so that the air supply temperature is too high, and the rotating speed of the indoor fan is reduced. If the temperature of the coil pipe obtained again is 8 ℃, the current temperature is lower, and the air quantity is too small, so that the air supply temperature is too low, and 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.
And after the rotating speed of the indoor fan is regulated, returning to obtain the set temperature and obtaining the coil temperature again in order to keep the constant air supply temperature, judging the relationship between the coil temperature obtained again and the set temperature, and regulating 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 the air conditioner from freezing provided by the embodiment of the invention is described below, and the control system for preventing the air conditioner from freezing and the control method described above can be referred to correspondingly.
As shown in fig. 6, the control system for preventing freezing of an air conditioner includes: an acquisition module 610, a determination module 620, and an execution module 630.
Wherein, the obtaining module 610 is configured to obtain a coil temperature and a preset temperature; the judging module 620 is configured to judge whether the air conditioner triggers a freeze protection mode based on the coil temperature and a preset temperature; the execution module 630 is configured to adjust an operation state of the air conditioner based on an operation mode triggered by the air conditioner; wherein, the running state includes: a variable shunt state and a fixed shunt state; in the case of a variable split state, the split state of the cooling air in the heat exchanger of the air conditioner is adjusted according to the working mode of the air conditioner; in the case of the fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
Fig. 7 illustrates a physical schematic diagram of an electronic device, as shown in fig. 7, which may include: processor 710, communication interface (Communications Interface) 720, memory 730, and communication bus 740, wherein processor 710, communication interface 720, memory 730 communicate with each other via communication bus 740. Processor 710 may invoke logic instructions in memory 730 to perform the control method including: obtaining the temperature of a coil pipe 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; based on the working mode triggered by the air conditioner, adjusting the running state of the air conditioner; wherein the operating state includes: a variable shunt state and a fixed shunt state; in the case of the variable split state, cooling in a heat exchanger of the air conditioner adjusts the split state according to the working mode of the air conditioner; and under the condition of the fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
It should be noted that, in this embodiment, the electronic device may be a server, a PC, or other devices in the specific implementation, so long as the structure of the electronic device includes a processor 710, a communication interface 720, a memory 730, and a communication bus 740 as shown in fig. 7, where the processor 710, the communication interface 720, and the memory 730 complete communication with each other through the communication bus 740, and the processor 710 may call logic instructions in the memory 730 to execute the above method. The embodiment does not limit a specific implementation form of the electronic device.
Further, the logic instructions in the memory 730 described above may be implemented in the form of software functional units and may be stored in a computer readable storage medium when sold or used as a stand alone product. Based on this understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art or in a part of the technical solution, in the form of a software product stored in a storage medium, comprising several instructions for causing a computer device (which may be a personal computer, a server, a network device, etc.) to perform all or part of the steps of the method 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, random Access Memory), a magnetic disk, or an optical disk, or other various media capable of storing program codes.
Further, an embodiment of the present invention discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the control method provided by the above-mentioned method embodiments, the control method comprising: obtaining the temperature of a coil pipe 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; based on the working mode triggered by the air conditioner, adjusting the running state of the air conditioner; wherein the operating state includes: a variable shunt state and a fixed shunt state; in the case of the variable split state, cooling in a heat exchanger of the air conditioner adjusts the split state according to the working mode of the air conditioner; and under the condition of the fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
In another aspect, embodiments of the present invention further provide a non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor, is implemented to perform the control method provided in the above embodiments, the control method including: obtaining the temperature of a coil pipe 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; based on the working mode triggered by the air conditioner, adjusting the running state of the air conditioner; wherein the operating state includes: a variable shunt state and a fixed shunt state; in the case of the variable split state, cooling in a heat exchanger of the air conditioner adjusts the split state according to the working mode of the air conditioner; and under the condition of the fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
The apparatus embodiments described above are merely illustrative, wherein the elements illustrated as separate elements may or may not be physically separate, and the elements shown as elements may or may not be physical elements, may be located in one place, or may be distributed over a plurality of network elements. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment. Those of ordinary skill in the art will understand and implement the present invention without undue burden.
From the above description of the embodiments, it will be apparent to those skilled in the art that the embodiments may be implemented by means of software plus necessary general hardware platforms, or of course may be implemented by means of hardware. Based on this understanding, the foregoing technical solution may be embodied essentially or in a part contributing to the prior art in the form of a software product, which may be stored in a computer readable storage medium, such as ROM/RAM, a magnetic disk, an optical disk, etc., including several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the method described in the respective embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
The above embodiments are only for illustrating the present invention, and are not limiting of the present invention. While the invention has been described in detail with reference to the embodiments, those skilled in the art will appreciate that various combinations, modifications, or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and it is intended to be covered by the scope of the claims of the present invention.
Claims (8)
1. A control method for preventing freezing of an air conditioner, characterized in that a heat exchanger of the air conditioner is provided with a variable flow diversion device, the variable flow diversion device comprising: the reversing valve is a two-position four-way reversing valve and is provided with a first communication port, a second communication port, a third communication port and a fourth communication port, the reversing valve is provided with a first station and a second station, the first communication port is connected with a refrigerant inlet, and the third communication port is connected with a refrigerant outlet; when the multi-way flow is split, the reversing valve is positioned at a first station, the first communication port is communicated with the second communication port, the third communication port is communicated with the fourth communication port, the second communication port is communicated with the first flow splitting pipeline, and the fourth communication port is communicated with the second flow splitting pipeline; when the single-way flow is split, the reversing valve is positioned at a second station, the first communication port is communicated with the fourth communication port, the third communication port is communicated with the second communication port, the second communication port is communicated with the second flow splitting pipeline, and the fourth communication port is communicated with the first flow splitting pipeline;
the control method for preventing the air conditioner from freezing comprises the following steps:
acquiring the temperature of a coil pipe in a room 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;
based on the working mode triggered by the air conditioner, adjusting the running state of the air conditioner; if the air conditioner is not in the freezing protection mode, the air conditioner is adjusted to be in a fixed split state;
if the air conditioner is in the freezing protection mode, the air conditioner is adjusted to be in a variable split state; acquiring the current split state of the air conditioner; the shunt state includes: single-path split flow and multi-path split flow; if the air conditioner is in the single-path split, adjusting the air conditioner to work for the multi-path split; if the air conditioner is in the multi-way split, keeping the multi-way split to work;
wherein the operating state includes: a variable shunt state and a fixed shunt state; in the case of a variable split state, the split state is adjusted by cooling in a heat exchanger of the air conditioner according to the working mode of the air conditioner; in the case of a fixed split state, the split state of the refrigerant in the heat exchanger is fixed.
2. The method of claim 1, wherein the step of determining whether the air conditioner triggers a freeze 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 is smaller than the preset temperature, the air conditioner executes a freezing protection mode.
3. The method for controlling 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 further comprises:
acquiring a set temperature, acquiring a coil temperature again, and judging the relationship between the acquired coil temperature and the set temperature;
and adjusting the rotating speed of the indoor fan based on the relationship between the acquired coil temperature and the set temperature.
4. The control method for preventing freezing of an air conditioner according to claim 3, wherein the step of adjusting the rotational speed of the indoor fan based on the re-acquired relationship between the coil temperature and the set temperature comprises:
if the acquired coil temperature is greater than the set temperature, reducing the rotating speed of the indoor fan;
if the acquired coil temperature is smaller than the set temperature, increasing the rotating speed of the indoor fan;
and if the acquired coil temperature is equal to the set temperature, controlling the indoor fan to keep the current state.
5. The method of claim 3, wherein the step of adjusting the rotational speed of the indoor fan based on the re-acquired relationship between the coil temperature and the set temperature further comprises:
and returning to the step of acquiring the set temperature and acquiring the coil temperature again, and judging the relationship between the coil temperature acquired again and the set temperature.
6. A control system for preventing freezing of an air conditioner that controls the control method for preventing freezing of an air conditioner according to any one of claims 1 to 5, comprising:
the acquisition module is used for acquiring the indoor coil temperature 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 coil temperature and the preset temperature;
and the execution module is used for adjusting the running state of the air conditioner based on the working mode triggered by the air conditioner.
7. 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 of preventing freezing of an air conditioner according to any one of claims 1 to 5 when executing the program.
8. A non-transitory computer readable storage medium having stored thereon a computer program, which when executed by a processor implements the control method of preventing freezing of an air conditioner according to any one of claims 1 to 5.
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