CN111578441A - Non-stop defrosting control method and device and air conditioner - Google Patents
Non-stop defrosting control method and device and air conditioner Download PDFInfo
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- CN111578441A CN111578441A CN202010396436.2A CN202010396436A CN111578441A CN 111578441 A CN111578441 A CN 111578441A CN 202010396436 A CN202010396436 A CN 202010396436A CN 111578441 A CN111578441 A CN 111578441A
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/62—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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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- Air Conditioning Control Device (AREA)
Abstract
The invention provides a defrosting control method without shutdown, a device and an air conditioner, wherein the method comprises the following steps: acquiring the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of an outdoor condenser in the heating mode of the air conditioner; judging whether the air conditioner falls into a defrosting temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of the outdoor condenser; and if the air conditioner falls into the defrosting temperature range, controlling the electromagnetic valve to be opened. Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting control method and device without shutdown and an air conditioner.
Background
In the heating mode of the air conditioner, the condenser of the outdoor unit needs to evaporate and absorb heat, and the outdoor environment temperature needing to heat is low, so that the outer side temperature of the condenser is easily too low to frost.
After a condenser of an existing air conditioner is frosted, the existing air conditioner is generally switched to be in a refrigeration mode from a heating mode through switching the working state of a four-way valve, and in the refrigeration mode, an outdoor unit condenser is condensed to release heat, so that the frosting on the outer side of the condenser is melted, and the defrosting effect is achieved.
However, in this defrosting method, since the air conditioner is switched from the heating mode to the cooling mode, the indoor unit cannot continue heating, and the normal operation of the air conditioner is disturbed, which reduces comfort and deteriorates user experience.
Disclosure of Invention
The invention solves the problem that the heating of the existing air conditioner needs to be stopped when defrosting, so that the user experience is poor.
In order to solve the above problems, the present invention firstly provides a defrosting control method without shutdown, which includes:
under the heating mode of the air conditioner, acquiring the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of an outdoor condenser, wherein the air outlet of a compressor of the air conditioner is connected with the air inlet of the outdoor condenser through a pipeline assembly with an electromagnetic valve;
judging whether the air conditioner falls into a defrosting temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of the outdoor condenser;
and if the air conditioner falls into the defrosting temperature range, controlling the electromagnetic valve to be opened.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Optionally, when the following conditions are satisfied, determining that the air conditioner falls within the defrosting temperature range:
the outdoor environment temperature is greater than or equal to zero and the outdoor coil temperature is less than the temperature difference between zero and a first temperature threshold;
or, the outdoor environment temperature is less than zero degrees and the outdoor coil temperature is less than the temperature difference between the outdoor environment temperature and the first temperature threshold.
And setting a first temperature threshold value to define whether frosting reaches a certain thickness or not, so that defrosting is carried out after the frosting reaches the certain thickness, and the interference of frosting on a normal heating mode is prevented.
Optionally, it is also determined that the air conditioner falls within the defrosting temperature range when the following conditions are satisfied:
the air conditioner receives a defrosting instruction.
Therefore, after the defrosting instruction is received, detection data such as outdoor environment temperature and the like are not considered, the fact that the air conditioner falls into the defrosting temperature range is directly judged, defrosting operation is carried out in time, the defrosting instruction is executed, and the consequences that the user comfort degree is reduced due to the fact that the execution is not in time are avoided.
Optionally, after determining whether the outdoor ambient temperature, the outdoor coil temperature, and the outdoor condenser inlet pipe temperature fall within the defrosting temperature range, the method further includes:
and if the air conditioner does not fall into the defrosting temperature range, maintaining the closing state of the electromagnetic valve.
In this way, by maintaining the closing state of the electromagnetic valve, the closing of the passage between the air outlet of the compressor and the air inlet of the condenser is ensured, thereby eliminating the influence of the arrangement of the passage on the running state of the normal air conditioner.
Optionally, if the air conditioner falls into the defrosting temperature range, after controlling the electromagnetic valve to open, the method further includes:
the outdoor environment temperature and the outdoor coil temperature are obtained again, and the defrosting time is recorded;
judging whether the air conditioner falls into a frost-out temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the defrosting time;
and if the air conditioner falls into the frost-out temperature range, controlling the electromagnetic valve to be closed.
Therefore, after defrosting is finished, the air outlet of the compressor and the air inlet communicating channel of the condenser are disconnected, and normal heating operation is recovered, so that the refrigerant in the air outlet of the compressor is prevented from entering the condenser through the channel, normal heating operation of the air conditioner is kept, and comfort and experience are improved. Through the solenoid valve break-make, both kept fine controllability, still make the disconnection of intercommunication passageway comparatively complete, avoided the refrigerant of disconnection back passageway to reveal.
Optionally, determining that the air conditioner falls into the frost-out temperature range when the following conditions are satisfied:
the outdoor ambient temperature is less than a second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold.
Like this, judge through the minimum temperature of condenser whether remove clean frost layer, more guarantee like this to the clear effect on frost layer, avoid the frost layer to clear away not enough, and then appear frequently defrosting and act the normal condition of heating the operation that influences the air conditioner.
Optionally, it is also determined that the air conditioner falls within the frost-out temperature range when the following conditions are satisfied:
the outdoor ambient temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold;
or, the outdoor environment temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to zero degrees and is smaller than the third temperature threshold for a first preset time.
Therefore, under the condition that the outdoor environment temperature is easier to defrost, the constraint condition of exiting defrosting is relaxed, so that the defrosting time is substantially reduced, and the influence of defrosting on normal heating operation is further reduced.
Optionally, it is also determined that the air conditioner falls within the frost-out temperature range when the following conditions are satisfied:
the defrosting time exceeds a second preset time;
or, the air conditioner receives an exit defrosting instruction.
Therefore, after the defrosting quitting instruction is received or the defrosting time is exceeded, the detection data such as the outdoor environment temperature and the like are not considered, the air conditioner is directly judged to fall into the defrosting-to-the-utmost temperature range, then quitting operation is carried out in time, the defrosting quitting instruction is executed, and the consequences that the comfort level of a user is reduced or normal heating operation of the air conditioner is influenced due to untimely execution or overlong defrosting time are avoided.
Optionally, after determining whether the air conditioner falls into the frost-out temperature range according to the outdoor environment temperature, the outdoor coil temperature and the defrosting time, the method further includes:
and if the air conditioner does not fall into the frost-out temperature range, maintaining the opening state of the electromagnetic valve.
Like this, maintain the defrosting operation when not reaching the defrosting effect, until reaching the defrosting effect to guaranteed the defrosting effect, avoided frequent defrosting.
Secondly provide a defrosting controlling means that does not shut down, it includes:
the system comprises an acquisition unit, a control unit and a control unit, wherein the acquisition unit is used for acquiring the outdoor environment temperature, the outdoor coil pipe temperature and the inlet pipe temperature of an outdoor condenser in the heating mode of the air conditioner, and the air outlet of a compressor of the air conditioner is connected with the air inlet of the outdoor condenser through a pipeline assembly with an electromagnetic valve;
the judging unit is used for judging whether the air conditioner falls into a defrosting temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of the outdoor condenser;
and the control unit is used for controlling the electromagnetic valve to be opened if the air conditioner falls into the defrosting temperature range.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
There is provided an air conditioner again comprising a computer readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the non-stop defrost control method as described above.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Finally, a computer-readable storage medium is provided, in which a computer program is stored, and when the computer program is read and executed by a processor, the non-stop defrosting control method is implemented.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Drawings
FIG. 1 is a flow chart of a non-stop defrost control method according to one embodiment of the present invention;
FIG. 2 is a flow chart of a non-stop defrost control method according to another embodiment of the present invention;
FIG. 3 is a flow chart of a non-stop defrost control method according to yet another embodiment of the present invention;
FIG. 4 is a flow chart of a non-stop defrost control method according to yet another embodiment of the present invention;
fig. 5 is a block diagram of a non-stop defrosting control apparatus according to an embodiment of the present invention.
Description of reference numerals:
1-an acquisition unit, 2-a judgment unit and 3-a control unit.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
For easy understanding, in the present invention, technical problems therein need to be elaborated.
In the heating mode of the air conditioner, the condenser of the outdoor unit needs to evaporate and absorb heat, and the outdoor environment temperature needing to heat is low, so that the outer side temperature of the condenser is easily too low to frost.
After a condenser of an existing air conditioner is frosted, the existing air conditioner is generally switched to be in a refrigeration mode from a heating mode through switching the working state of a four-way valve, and in the refrigeration mode, an outdoor unit condenser is condensed to release heat, so that the frosting on the outer side of the condenser is melted, and the defrosting effect is achieved.
In the normal heating mode, the air outlet of the indoor unit always blows out warm air until the whole indoor environment temperature reaches the preset temperature; however, in this defrosting method, since the indoor unit cannot continue the heating operation by switching the air conditioner from the heating mode to the cooling mode, the actual blowing situation is: heating and blowing warm air; the frost is formed, the stop of the inner fan is converted into the refrigeration and defrosting, and at the moment, the fan of the indoor unit stops and does not blow air any more; after defrosting, the indoor unit switches to heating, and the indoor unit blows out warm air again (the temperature of the warm air at the moment is different from the temperature of the warm air before). In this way, the air conditioner provides the user with a feeling of experience, that is, intermittent heating, and thus the comfort is reduced and the feeling of experience is deteriorated.
In the field of air conditioners, the names of the heat exchangers of the indoor unit and the outdoor unit are divided into two cases, one is named according to different installation positions, namely, the heat exchanger on the indoor unit side is called as an evaporator, and the heat exchanger on the outdoor unit side is called as a condenser; one is named according to the difference in the functions of the heat exchangers, that is, the heat exchanger functioning to evaporate and absorb heat (for the internal refrigerant) is called an evaporator, and the heat exchanger functioning to condense and release heat (for the internal refrigerant) is called a condenser, so that the heat exchanger on the indoor unit side is called an evaporator, the heat exchanger on the outdoor unit side is called a condenser, and the heat exchanger on the indoor unit side is called a condenser, and the heat exchanger on the outdoor unit side is called an evaporator in the heating mode.
In this application, to prevent confusion, the condenser is a heat exchanger provided on the outdoor unit side, and the evaporator is a heat exchanger provided on the indoor unit side.
The embodiment of the disclosure provides a non-stop defrosting control method, which can be executed by a non-stop defrosting control device, and the non-stop defrosting control device can be integrated in electronic equipment such as an air conditioner, a multi-split air conditioner, an air conditioner control device and the like. Fig. 1 is a flowchart of a non-stop defrosting control method according to an embodiment of the present invention; the non-stop defrosting control method comprises the following steps:
the air outlet of the compressor is communicated with the air inlet of the condenser of the outdoor unit, and the on-off of the communication channel is controlled by the electromagnetic valve. Thereby defrosting without stopping the machine.
The outdoor environment temperature may be obtained by a temperature sensor, or may be obtained by other means such as a network.
The outdoor coil temperature refers to the coil temperature of the heat exchanger of the outdoor unit of the air conditioner, and the actual measurement of the outdoor coil temperature in the application is the temperature of the air outlet of the condenser due to the arrangement position of the temperature sensor on the outdoor coil temperature. It can be obtained by a temperature sensor arranged on the external coil, or can be obtained directly or indirectly by other means.
Here, it should be noted that, in the condenser, since the flow direction of the internal refrigerant is different between the heating mode and the cooling mode, the positions of the air outlet and the air inlet are also changed, in this application, the air outlet of the condenser refers to a port through which the refrigerant flows out in the heating mode, and the air inlet of the condenser refers to a port through which the refrigerant flows in the heating mode.
The temperature of the inlet pipe of the outdoor condenser is the temperature of the air inlet of the condenser, and can be measured by a temperature sensor arranged at the air inlet of the condenser, or can be directly or indirectly obtained by other modes.
falling into the defrosting temperature range means that a frost layer with a certain thickness is generated outside the condenser, which brings great obstruction to the normal heat exchange of the condenser, and frost needs to be removed or thinned, so that the obstruction caused by the frost layer is reduced or even eliminated.
And 300, if the air conditioner falls into the defrosting temperature range, controlling the electromagnetic valve to be opened.
The electromagnetic valve is opened, that is, the air outlet of the compressor is communicated with the air inlet of the condenser, and the high-temperature and high-pressure refrigerant generated by the air outlet of the compressor can enter the condenser through the communication channel to defrost.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Optionally, when the following conditions are satisfied, determining that the air conditioner falls within the defrosting temperature range:
the outdoor environment temperature is greater than or equal to zero and the outdoor coil temperature is less than the temperature difference between zero and a first temperature threshold;
or, the outdoor environment temperature is less than zero degrees and the outdoor coil temperature is less than the temperature difference between the outdoor environment temperature and the first temperature threshold.
Wherein, divide into two kinds of situations through the zero degree with outdoor ambient temperature, divide into the environment of easily frosting and the environment of difficult frosting based on the zero degree with it to specifically prescribe separately, like this, improved the degree of accuracy to falling into the definition of defrosting temperature scope, thereby improve the degree of accuracy of judging the defrosting opportunity.
The outdoor unit condenser plays a role in evaporation and heat absorption in a heating mode, and absorbs heat from the external environment under the action of refrigerant evaporation; however, if the outside of the condenser is frosted (frosted to a certain thickness), the heat exchange between the refrigerant and the external environment is disturbed, and the refrigerant cannot absorb enough heat from the external environment, so that the temperature at the outlet of the condenser (the temperature of the outdoor coil) is lowered.
In addition, when the outdoor environment is greater than zero degree, whether the temperature of the outdoor coil pipe is smaller than zero degree by more than a first temperature threshold value is directly judged, so that the condition that frosting still can be formed under the environment condition is defined, and the definition is more accurate.
And setting a first temperature threshold value to define whether frosting reaches a certain thickness or not, so that defrosting is carried out after the frosting reaches the certain thickness, and the interference of frosting on a normal heating mode is prevented.
Optionally, the value range of the first temperature threshold is 4-6 ℃. Thus, if the difference between the outdoor coil temperature and the outdoor environment temperature exceeds the temperature threshold, it means that the refrigerant fails to absorb enough heat from the outdoor environment, and thus it can be determined that the frosting degree obviously affects the heat absorption effect of the refrigerant, and the range needing defrosting is defined.
Optionally, the first temperature threshold is 5 ℃. Therefore, the range needing defrosting can be defined, so that the defrosting operation can be timely executed, and the interference of frosting on the normal operation of the air conditioner is reduced.
Optionally, it is also determined that the air conditioner falls within the defrosting temperature range when the following conditions are satisfied:
the air conditioner receives a defrosting instruction.
The defrosting instruction can be sent by a remote controller, or can be sent by other authorized equipment in the air conditioner, such as a mobile phone, a computer and the like in a wired/wireless mode.
Therefore, after the defrosting instruction is received, detection data such as outdoor environment temperature and the like are not considered, the fact that the air conditioner falls into the defrosting temperature range is directly judged, defrosting operation is carried out in time, the defrosting instruction is executed, and the consequences that the user comfort degree is reduced due to the fact that the execution is not in time are avoided.
It should be noted that, the judgment that the air conditioner receives the defrosting instruction is only considered that the air conditioner falls into the defrosting temperature range for convenience of description, and whether the air conditioner receives the defrosting exit instruction or not can be directly detected after being powered on, and defrosting is directly started after being received.
Optionally, as shown in fig. 2, after the step 200 of determining whether the outdoor environment temperature, the outdoor coil temperature, and the outdoor condenser inlet pipe temperature fall within the defrosting temperature range, the method further includes:
and step 400, if the air conditioner does not fall into the defrosting temperature range, maintaining the closing state of the electromagnetic valve.
In this step, while maintaining the closed state of the electromagnetic valve, step 100 is executed again, and in the heating mode of the air conditioner, the outdoor environment temperature, the outdoor coil temperature and the outdoor condenser inlet pipe temperature are obtained, so that the circulation operation is performed without falling into the defrosting temperature range, and the defrosting operation is started only when falling into the defrosting temperature range.
The electromagnetic valve controls the on-off of a passage between the air outlet of the compressor and the air inlet of the condenser, and when defrosting is not needed, the opening of the passage between the air outlet of the compressor and the air inlet of the condenser needs to be guaranteed, so that the heating efficiency of the air conditioner is prevented from being reduced due to the fact that part of refrigerant leaks to the air inlet of the condenser from the air outlet of the compressor.
Therefore, the closing state of the electromagnetic valve is maintained, the closing of a passage between the air outlet of the compressor and the air inlet of the condenser is ensured, and the influence of the arrangement of the passage on the running state of a normal air conditioner is eliminated (the heating efficiency of the air conditioner is reduced due to the fact that part of refrigerant leaks to the air inlet of the condenser from the air outlet of the compressor, and the like).
Optionally, as shown in fig. 3, in the step 300, if the air conditioner falls into the defrosting temperature range, after controlling the electromagnetic valve to open, the method further includes:
the outdoor environment temperature may be obtained by a temperature sensor, or may be obtained by other means such as a network.
The outdoor coil temperature refers to the coil temperature of the heat exchanger of the outdoor unit of the air conditioner, and the actual measurement of the outdoor coil temperature in the application is the temperature of the air outlet of the condenser due to the arrangement position of the temperature sensor on the outdoor coil temperature. It can be obtained by a temperature sensor arranged on the external coil, or can be obtained directly or indirectly by other means.
The duration of the defrosting of the air conditioner is recorded after the defrosting is started (after the electromagnetic valve is opened).
among them, falling into the frost-out temperature range means that the thickness of the frost layer outside the condenser is very thin or has disappeared, and the obstruction to the normal heat exchange of the condenser is very small or cannot be brought about.
And 700, if the air conditioner falls into the frost-out temperature range, controlling the electromagnetic valve to be closed.
Closing the electromagnetic valve means disconnecting the communication channel between the air outlet of the compressor and the air inlet of the condenser, thereby preventing the high-temperature and high-pressure refrigerant generated by the air outlet of the compressor from entering the condenser through the communication channel, and recovering the normal heating operation.
Therefore, after defrosting is finished, the air outlet of the compressor and the air inlet communicating channel of the condenser are disconnected, and normal heating operation is recovered, so that the refrigerant in the air outlet of the compressor is prevented from entering the condenser through the channel, normal heating operation of the air conditioner is kept, and comfort and experience are improved. Through the solenoid valve break-make, both kept fine controllability, still make the disconnection of intercommunication passageway comparatively complete, avoided the refrigerant of disconnection back passageway to reveal.
Optionally, determining that the air conditioner falls into the frost-out temperature range when the following conditions are satisfied:
the outdoor ambient temperature is less than a second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold.
In the application, the temperature of the outdoor coil pipe is the temperature of a refrigerant outflow port of the condenser, in the defrosting process, a high-temperature and high-pressure refrigerant is introduced into the condenser, and the refrigerant flows in the condenser to radiate heat outwards, so that a frost layer on the outer side of the condenser is melted and removed; the refrigerant reduces along with the flowing temperature constantly, the temperature reaches the lowest at the port department that the refrigerant flows out, that is to say, the port department temperature that the refrigerant flows out is the minimum temperature of whole condenser, like this, judge whether to remove clean the frost layer through the minimum temperature of condenser, can guarantee more like this to the clear away of frost layer (minimum temperature all can show to clear away the frost layer to acceptable range, the frost layer of the remaining part is clear away can be cleaner, more can accept) the effect, avoid the frost layer to clear away inadequately, and then the condition that the normal heating operation of air conditioner is influenced in frequent defrosting action appears.
Optionally, the value range of the third temperature threshold is 7 ℃ to 10 ℃. The outdoor coil temperature is defined, so that the frost layer at the position corresponding to the outdoor coil temperature can be removed, and further the frost layer cleaning effect of other parts of the condenser is ensured.
Optionally, the third temperature threshold is 10 ℃. Therefore, the frosting of the condenser can be greatly removed, the defrosting effect is ensured, the normal use of the air conditioner is maintained, and the poor heating effect caused by frosting is eliminated.
Optionally, the second temperature threshold ranges from-6 ℃ to (-4 ℃). Like this, through setting up the second temperature threshold value, separate the difficult condition of defrosting of outdoor ambient temperature to set up different defrosting condition of withdrawing from, guarantee the defrosting effect.
Optionally, the value range of the second temperature threshold is-5 ℃. Therefore, the conditions that outdoor environment temperature is difficult to defrost and easy to defrost are defined, the accuracy of defrosting control is improved, defrosting is timely quitted under the condition that the defrosting effect is guaranteed, and the interference of long-time defrosting on the normal heating operation of the air conditioner is reduced.
Optionally, it is also determined that the air conditioner falls within the frost-out temperature range when the following conditions are satisfied:
the outdoor ambient temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold;
or, the outdoor environment temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to zero degrees and is smaller than the third temperature threshold for a first preset time.
The outdoor environment temperature is greater than or equal to the second temperature threshold, which means that for the current outdoor environment temperature, the normal defrosting speed is not delayed or is delayed very little, and defrosting is easier to perform.
Therefore, under the condition that the outdoor environment temperature is easier to defrost, the constraint condition of exiting defrosting is relaxed, so that the defrosting time is substantially reduced, and the influence of defrosting on normal heating operation is further reduced.
Optionally, the value range of the first preset duration is 1min to 2min, and 1min is preferably selected. Therefore, the defrosting time of the outer frost layer of the condenser is restricted through the first preset time, so that the defrosting effect is improved by ensuring the defrosting time under the condition that the temperature of the outdoor coil does not reach the preset third temperature threshold value, the defrosting effect is further ensured, and the normal operation of the air conditioner is maintained.
Optionally, it is also determined that the air conditioner falls within the frost-out temperature range when the following conditions are satisfied:
the defrosting time exceeds a second preset time;
or, the air conditioner receives an exit defrosting instruction.
The defrosting instruction can be sent by a remote controller, or can be sent by other authorized equipment in the air conditioner, such as a mobile phone, a computer and the like in a wired/wireless mode.
The second preset time period may be preset in the air conditioner, or may be directly or indirectly obtained through other methods.
Therefore, after the defrosting quitting instruction is received or the defrosting time is exceeded, the detection data such as the outdoor environment temperature and the like are not considered, the air conditioner is directly judged to fall into the defrosting-to-the-utmost temperature range, then quitting operation is carried out in time, the defrosting quitting instruction is executed, and the consequences that the comfort level of a user is reduced or normal heating operation of the air conditioner is influenced due to untimely execution or overlong defrosting time are avoided.
It should be noted that, the judgment that the air conditioner receives the instruction to quit defrosting is only considered that the air conditioner falls into the defrosting-out temperature range for convenience of description, and it may also be directly detected whether the instruction to quit defrosting is received after the defrosting operation is performed and the defrosting is directly quitted after the instruction is received.
Optionally, the value range of the second preset time period is 10min to 12min, and is preferably 12 min. Therefore, the negative influence on normal heating operation caused by long-term defrosting operation of the air conditioner and the damage on devices such as a condenser and the like caused by long-term defrosting operation can be avoided through the second preset duration.
Optionally, as shown in fig. 4, the step 600, after determining whether the air conditioner falls into a frost-out temperature range according to the outdoor environment temperature, the outdoor coil temperature and the defrosting time, further includes:
In the step, while the opening state of the electromagnetic valve is maintained, the step 500 is executed again, the outdoor environment temperature and the outdoor coil temperature are obtained again, and the defrosting time is recorded, so that the circulating operation under the condition that the outdoor environment temperature and the outdoor coil temperature do not fall into the frost-free temperature range is formed, the defrosting operation is only quitted when the outdoor environment temperature and the outdoor coil temperature fall into the frost-free temperature range, and the defrosting effect is ensured.
Like this, maintain the defrosting operation when not reaching the defrosting effect, until reaching the defrosting effect to guaranteed the defrosting effect, avoided frequent defrosting.
The embodiment of the disclosure provides a non-stop defrosting control device, which is used for executing the non-stop defrosting control method, and the non-stop defrosting control device is described in detail below.
As shown in fig. 5, the non-stop defrost control apparatus includes:
the system comprises an acquisition unit 1, a control unit and a control unit, wherein the acquisition unit is used for acquiring outdoor environment temperature, outdoor coil pipe temperature and outdoor condenser inlet pipe temperature in an air conditioner heating mode, and an air outlet of an air conditioner compressor is connected with an air inlet of an outdoor condenser through a pipeline assembly with an electromagnetic valve;
the judging unit 2 is used for judging whether the air conditioner falls into a defrosting temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of the outdoor condenser;
and the control unit 3 is used for controlling the electromagnetic valve to be opened if the air conditioner falls into the defrosting temperature range.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Optionally, when the following conditions are satisfied, determining that the air conditioner falls within the defrosting temperature range:
the outdoor environment temperature is greater than or equal to zero and the outdoor coil temperature is less than the temperature difference between zero and a first temperature threshold; or, the outdoor environment temperature is less than zero degrees and the outdoor coil temperature is less than the temperature difference between the outdoor environment temperature and the first temperature threshold.
Optionally, it is also determined that the air conditioner falls within the defrosting temperature range when the following conditions are satisfied: the air conditioner receives a defrosting instruction.
Optionally, the control unit 3 is further configured to: and if the air conditioner does not fall into the defrosting temperature range, maintaining the closing state of the electromagnetic valve.
Optionally, the obtaining unit 1 is further configured to: the outdoor environment temperature and the outdoor coil temperature are obtained again, and the defrosting time is recorded;
the judging unit 2 is further configured to: judging whether the air conditioner falls into a frost-out temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the defrosting time;
the control unit 3 is further configured to: and if the air conditioner falls into the frost-out temperature range, controlling the electromagnetic valve to be closed.
Optionally, determining that the air conditioner falls into the frost-out temperature range when the following conditions are satisfied: the outdoor ambient temperature is less than a second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold.
Optionally, it is also determined that the air conditioner falls within the frost-out temperature range when the following conditions are satisfied: the outdoor ambient temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold; or, the outdoor environment temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to zero degrees and is smaller than the third temperature threshold for a first preset time.
Optionally, it is also determined that the air conditioner falls within the frost-out temperature range when the following conditions are satisfied: the defrosting time exceeds a second preset time; or, the air conditioner receives an exit defrosting instruction.
Optionally, the control unit 3 is further configured to: and if the air conditioner does not fall into the frost-out temperature range, maintaining the opening state of the electromagnetic valve.
The embodiment of the disclosure provides an air conditioner, which comprises a computer readable storage medium and a processor, wherein the computer readable storage medium is used for storing a computer program, and the computer program is read by the processor and runs to realize the non-stop defrosting control method.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
The embodiment of the present disclosure also provides a computer-readable storage medium, which stores instructions, and when the instructions are loaded and executed by a processor, the method for controlling non-stop defrosting can be implemented.
The technical solution of the embodiment of the present invention essentially or partially contributes to the prior art, or all or part of the technical solution 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 an air conditioner, a refrigeration device, a personal computer, a server, or a network device, etc.) or a processor (processor) to execute all or part of the steps of the method of the embodiment of the present invention. And the aforementioned storage medium includes: various media capable of storing program codes, such as a U disk, a removable hard disk, a ROM, a RAM, a magnetic disk, or an optical disk.
Like this, when needs defrost, with the gas outlet of compressor and the air inlet intercommunication of condenser, directly let in the high-temperature high-pressure refrigerant that the compressor gas outlet produced in the condenser and defrost to need not to switch the operation mode of air conditioner, can accomplish the defrosting purpose, thereby avoided the travelling mode to switch the travelling comfort that leads to and experienced the condition that feels the variation, maintained the normal operating condition of air conditioner, improved comfort level and experience and felt.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (12)
1. A defrosting control method without stopping is characterized by comprising the following steps:
under the heating mode of the air conditioner, acquiring the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of an outdoor condenser, wherein the air outlet of a compressor of the air conditioner is connected with the air inlet of the outdoor condenser through a pipeline assembly with an electromagnetic valve;
judging whether the air conditioner falls into a defrosting temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the inlet pipe temperature of the outdoor condenser;
and if the air conditioner falls into the defrosting temperature range, controlling the electromagnetic valve to be opened.
2. The non-stop defrosting control method according to claim 1, wherein it is determined that the air conditioner falls in the defrosting temperature range when the following condition is satisfied:
the outdoor environment temperature is greater than or equal to zero and the outdoor coil temperature is less than the temperature difference between zero and a first temperature threshold;
or, the outdoor environment temperature is less than zero degrees and the outdoor coil temperature is less than the temperature difference between the outdoor environment temperature and the first temperature threshold.
3. The non-stop defrost control method of claim 2, wherein the air conditioner is also determined to fall within the defrost temperature range when the following conditions are satisfied:
the air conditioner receives a defrosting instruction.
4. The non-stop defrost control method of any one of claims 1-3, wherein said determining whether the outdoor ambient temperature, the outdoor coil temperature, the outdoor condenser service temperature fall within a defrost temperature range further comprises:
and if the air conditioner does not fall into the defrosting temperature range, maintaining the closing state of the electromagnetic valve.
5. The non-stop defrosting control method according to any one of claims 1 to 3, further comprising, after controlling the electromagnetic valve to open if the air conditioner falls within the defrosting temperature range:
the outdoor environment temperature and the outdoor coil temperature are obtained again, and the defrosting time is recorded;
judging whether the air conditioner falls into a frost-out temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the defrosting time;
and if the air conditioner falls into the frost-out temperature range, controlling the electromagnetic valve to be closed.
6. The non-stop defrosting control method according to claim 5, wherein it is determined that the air conditioner falls within the frost-up temperature range when the following conditions are satisfied:
the outdoor ambient temperature is less than a second temperature threshold and the outdoor coil temperature is greater than or equal to a third temperature threshold.
7. The non-stop defrosting control method according to claim 6, wherein it is also determined that the air conditioner falls within the frost-up temperature range when the following conditions are satisfied:
the outdoor ambient temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to the third temperature threshold;
or, the outdoor environment temperature is greater than or equal to the second temperature threshold and the outdoor coil temperature is greater than or equal to zero degrees and is smaller than the third temperature threshold for a first preset time.
8. The non-stop defrosting control method according to claim 6, wherein it is also determined that the air conditioner falls within the frost-up temperature range when the following conditions are satisfied:
the defrosting time exceeds a second preset time;
or, the air conditioner receives an exit defrosting instruction.
9. The non-stop defrosting control method according to claim 5, wherein after determining whether the air conditioner falls within a frost-out temperature range based on the outdoor environment temperature, the outdoor coil temperature, and the defrosting time, further comprising:
and if the air conditioner does not fall into the frost-out temperature range, maintaining the opening state of the electromagnetic valve.
10. A non-stop defrosting control device, comprising:
the system comprises an acquisition unit (1) and a control unit, wherein the acquisition unit is used for acquiring outdoor environment temperature, outdoor coil pipe temperature and outdoor condenser inlet pipe temperature in the heating mode of the air conditioner, and an air outlet of an air conditioner compressor is connected with an air inlet of an outdoor condenser through a pipeline assembly with an electromagnetic valve;
the judging unit (2) is used for judging whether the air conditioner falls into a defrosting temperature range or not according to the outdoor environment temperature, the outdoor coil temperature and the outdoor condenser inlet pipe temperature;
and the control unit (3) is used for controlling the electromagnetic valve to be opened if the air conditioner falls into the defrosting temperature range.
11. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, the computer program being read and executed by the processor to implement the non-stop defrost control method according to any one of claims 1-9.
12. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the non-stop defrost control method according to any of claims 1-9.
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| CN115751611A (en) * | 2022-10-20 | 2023-03-07 | 宁波奥克斯电气股份有限公司 | Partial load non-stop defrosting control method and device and variable frequency air conditioner |
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