CN116592490A - Anti-freezing control method and device for air conditioner, air conditioner and storage medium - Google Patents
Anti-freezing control method and device for air conditioner, air conditioner and storage medium Download PDFInfo
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- CN116592490A CN116592490A CN202310531434.3A CN202310531434A CN116592490A CN 116592490 A CN116592490 A CN 116592490A CN 202310531434 A CN202310531434 A CN 202310531434A CN 116592490 A CN116592490 A CN 116592490A
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- 238000007710 freezing Methods 0.000 title claims abstract description 77
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000003507 refrigerant Substances 0.000 claims abstract description 37
- 230000002528 anti-freeze Effects 0.000 claims description 9
- 108010053481 Antifreeze Proteins Proteins 0.000 claims description 8
- 238000005057 refrigeration Methods 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 12
- 230000002411 adverse Effects 0.000 abstract description 5
- 230000008014 freezing Effects 0.000 description 12
- 238000004891 communication Methods 0.000 description 7
- 230000006870 function Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 6
- 230000002265 prevention Effects 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 238000001816 cooling Methods 0.000 description 4
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 230000001960 triggered effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000004590 computer program Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000008054 signal transmission Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- F24F11/89—Arrangement or mounting of control or safety devices
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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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The application relates to the technical field of air conditioners, and discloses an anti-freezing control method for an air conditioner, wherein a refrigerant flowing through a main refrigerant flow path flows into an indoor heat exchange coil through an indoor heat exchanger inlet after being split-flow treatment, and the method comprises the following steps: under the condition that the air conditioner operates in an anti-freezing mode, acquiring a temperature value of an inlet of the indoor heat exchanger and a temperature value of the indoor heat exchange coil; obtaining target frequency of the compressor according to the matching condition of the temperature value of the inlet of the indoor heat exchanger and the first target temperature range and the matching condition of the temperature value of the indoor heat exchange coil and the second target temperature range; the compressor is controlled to run at a target frequency to realize the anti-freezing protection of the indoor heat exchanger. The application can integrate the anti-freezing requirements of the refrigerant liquid inlet pipe and the middle coil pipe of the indoor heat exchanger, and reduce the adverse influence of the anti-freezing protection operation on the refrigeration of the air conditioner. The application also discloses an anti-freezing control device for the air conditioner, the air conditioner and a storage medium.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to an anti-freezing control method and device for an air conditioner, the air conditioner and a storage medium.
Background
At present, when the air conditioner operates in a refrigeration mode, if the indoor heat exchanger is frosted or frozen, the refrigeration capacity of the air conditioner is affected, the situation of attenuation of the refrigeration capacity occurs, and even the situation of water blowing or ice blowing occurs. Therefore, how to implement the anti-freezing protection when the air conditioner is operated in the cooling mode is a technical problem that needs to be solved currently.
The related art discloses a control method for preventing freezing of an air conditioner, the air conditioner comprises an indoor heat exchanger and a compressor, a liquid inlet of the indoor heat exchanger is provided with a first sensor for detecting the temperature of a liquid inlet pipe of a refrigerant, and the middle part of the air conditioner is provided with a second sensor for detecting the temperature of a middle pipe of the indoor heat exchanger. The control method comprises the following steps: acquiring the temperature of a refrigerant liquid inlet pipe and a middle pipe of an indoor heat exchanger when an air conditioner operates in a refrigeration mode; determining whether a preset freezing prevention condition is met according to the minimum tube temperature in the refrigerant liquid inlet tube temperature and the middle tube temperature of the indoor heat exchanger; and responding to the minimum pipe temperature to meet the preset anti-freezing condition, and determining and controlling the air conditioner to switch to the corresponding anti-freezing mode according to the minimum pipe temperature. Wherein, if the minimum tube Wen Manzu is in the first temperature condition, the anti-freeze mode includes reducing the frequency of the compressor. In this way, the control method is characterized in that a temperature sensor is additionally arranged at the refrigerant liquid inlet pipe orifice of the indoor heat exchanger and is used for detecting the temperature of the refrigerant liquid inlet pipe before the refrigerant is shunted to a plurality of heat exchange pipelines of the indoor heat exchanger. And then the freezing prevention judgment operation is carried out by using the minimum tube temperature in the refrigerant liquid inlet tube temperature and the middle tube temperature of the indoor heat exchanger and the freezing prevention condition, so that the real-time sensing of the whole temperature condition of the indoor heat exchanger is effectively improved, and the freezing prevention judgment device can also respond in time to the freezing of the local heat exchange pipeline of the indoor heat exchanger.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
when the air conditioner operates in a refrigeration mode, the temperature of the refrigerant liquid inlet pipe is smaller than that of the middle pipe, the antifreezing requirements of the refrigerant liquid inlet pipe and the middle coil pipe of the indoor heat exchanger are different, and the situation that the refrigerant liquid inlet pipe needs antifreezing protection and the middle coil pipe of the indoor heat exchanger does not need freezing protection temporarily exists. In this case, if the anti-freezing protection is triggered, the heat exchange capacity of the indoor heat exchanger is reduced, and the refrigerating effect of the air conditioner is affected.
It should be noted that the information disclosed in the above background section is only for enhancing understanding of the background of the application and thus may include information that does not form the prior art that is already known to those of ordinary skill in the art.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview, and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended as a prelude to the more detailed description that follows.
The embodiment of the disclosure provides an anti-freezing control method and device for an air conditioner, the air conditioner and a storage medium, so as to synthesize the anti-freezing requirements of a refrigerant liquid inlet pipe and a middle coil pipe of an indoor heat exchanger and reduce the adverse influence of anti-freezing protection operation on the refrigeration of the air conditioner.
In some embodiments, the refrigerant flowing through the main refrigerant flow path is diverted to flow into the indoor heat exchange coil through the indoor heat exchanger inlet, the method comprising: under the condition that the air conditioner operates in an anti-freezing mode, acquiring a temperature value of an inlet of the indoor heat exchanger and a temperature value of the indoor heat exchange coil; obtaining target frequency of the compressor according to the matching condition of the temperature value of the inlet of the indoor heat exchanger, the first target temperature range and the matching condition of the temperature value of the indoor heat exchange coil and the second target temperature range; the compressor is controlled to run at a target frequency to realize the anti-freezing protection of the indoor heat exchanger.
In some embodiments, the apparatus comprises: a processor and a memory storing program instructions, the processor being configured to perform the anti-freeze control method for an air conditioner as described above when the program instructions are executed.
In some embodiments, the air conditioner includes: a main refrigerant flow path configured with a first sensor for detecting a temperature value of an inlet of the indoor heat exchanger; the indoor heat exchanger is provided with an indoor heat exchange coil and a second sensor for detecting the temperature value of the indoor heat exchange coil, and the refrigerant flowing through the main refrigerant flow path flows into the indoor heat exchange coil through the diversion treatment after passing through the inlet of the indoor heat exchanger to realize heat exchange treatment; and the anti-freezing control device for the air conditioner is installed on the indoor heat exchanger.
In some embodiments, the storage medium stores program instructions that, when executed, perform an anti-freeze control method for an air conditioner as described above.
The anti-freezing control method and device for the air conditioner, the air conditioner and the storage medium provided by the embodiment of the disclosure can realize the following technical effects:
according to the embodiment of the disclosure, whether the indoor heat exchanger inlet needs to execute anti-freezing protection or not can be known according to the matching condition of the temperature value of the indoor heat exchanger inlet and the first target temperature range, and whether the indoor heat exchange coil needs to execute anti-freezing protection or not can be known according to the matching condition of the temperature of the indoor heat exchange coil and the second target temperature range. And then the target frequency of the compressor is determined by combining the matching conditions, so that the operating frequency of the compressor can be considered to meet the anti-freezing protection requirements of both the indoor heat exchanger inlet and the indoor heat exchange coil, and the adverse influence on the refrigeration of the air conditioner caused by executing the anti-freezing protection operation is reduced.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example and not limitation in the figures of the accompanying drawings, in which like references indicate similar elements, and in which like reference numerals refer to similar elements, and in which:
fig. 1 is a schematic structural view of an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic diagram of an anti-freezing control method for an air conditioner according to an embodiment of the present disclosure;
fig. 3 is a schematic view of another anti-freezing control method for an air conditioner provided in an embodiment of the present disclosure;
fig. 4 is a schematic view of another anti-freezing control method for an air conditioner provided in an embodiment of the present disclosure;
fig. 5 is a schematic view of another anti-freezing control method for an air conditioner provided in an embodiment of the present disclosure;
fig. 6 is a schematic view of an anti-freezing control device for an air conditioner according to an embodiment of the present disclosure;
fig. 7 is a schematic view of an air conditioner according to an embodiment of the present disclosure.
Reference numerals:
10: a main refrigerant flow path; 10a: a first sensor;
20: an indoor heat exchanger; 20a: a second sensor;
30: a first dispenser;
40: a second dispenser;
300: an anti-freezing control device for an air conditioner;
400: a processor; 401: a memory; 402: a communication interface; 403: a bus;
600: an air conditioner.
Detailed Description
So that the manner in which the features and techniques of the disclosed embodiments can be understood in more detail, a more particular description of the embodiments of the disclosure, briefly summarized below, may be had by reference to the appended drawings, which are not intended to be limiting of the embodiments of the disclosure. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may still be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawing.
The terms first, second and the like in the description and in the claims of the embodiments of the disclosure and in the above-described figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe embodiments of the present disclosure. Furthermore, the terms "comprise" and "have," as well as any variations thereof, are intended to cover a non-exclusive inclusion.
The term "plurality" means two or more, unless otherwise indicated.
In the embodiment of the present disclosure, the character "/" indicates that the front and rear objects are an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes an object, meaning that there may be three relationships. For example, a and/or B, represent: a or B, or, A and B.
The term "corresponding" may refer to an association or binding relationship, and the correspondence between a and B refers to an association or binding relationship between a and B.
Referring to fig. 1, an embodiment of the present disclosure provides an air conditioner including an indoor unit and an outdoor unit. The outdoor unit includes a compressor and a main refrigerant flow path 10. The main refrigerant flow path 10 is provided with a first sensor 10a. The indoor unit includes a plurality of indoor heat exchangers 20. Each indoor heat exchanger 20 is provided with an indoor heat exchange coil and a second sensor 20a for detecting a temperature value of the indoor heat exchange coil. The refrigerant flowing through the main refrigerant flow path 10 passes through the inlet of the indoor heat exchanger, is subjected to split-flow treatment, and flows into the indoor heat exchange coil. The first sensor 10a and the second sensor 20a are both temperature sensors. Alternatively, the main refrigerant flow path 10 is branched by the first distributor 30 after passing through the indoor heat exchanger inlet, and then flows into the indoor heat exchange coil through the indoor heat exchanger inlet. The refrigerant flowing through the indoor heat exchange coil is subjected to heat exchange treatment and then is subjected to confluence treatment by the second distributor 40, and then flows back to the main refrigerant flow path 10. Alternatively, the first sensor 10a is installed at the inlet of the first distributor 20, and the first sensor 10a is used to detect a temperature value at the inlet of the indoor heat exchanger 20.
By adopting the air conditioner provided by the embodiment of the disclosure, the temperature value of the inlet of the indoor heat exchanger is obtained through the first sensor, so that the temperature condition of the pipeline before flowing into the indoor heat exchanger is obtained. Meanwhile, the temperature value of the indoor heat exchange coil is obtained through the second sensor, so that the temperature condition of the indoor heat exchanger is obtained. Thus, the embodiment of the disclosure can synthesize respective temperature conditions before and after the refrigerant is split, and improve the accuracy of temperature detection.
As shown in fig. 2, an embodiment of the present disclosure provides an anti-freezing control method for an air conditioner, including:
and S01, the processor acquires the temperature value of the inlet of the indoor heat exchanger and the temperature value of the indoor heat exchange coil under the condition that the air conditioner operates in an anti-freezing mode.
S02, the processor obtains the target frequency of the compressor according to the matching condition of the temperature value of the inlet of the indoor heat exchanger and the first target temperature range and the matching condition of the temperature value of the indoor heat exchange coil and the second target temperature range.
S03, the processor controls the compressor to run at a target frequency so as to realize the anti-freezing protection of the indoor heat exchanger.
By adopting the anti-freezing control method for the air conditioner, which is provided by the embodiment of the disclosure, whether the indoor heat exchanger inlet needs to execute anti-freezing protection or not can be obtained according to the matching condition of the temperature value of the indoor heat exchanger inlet and the first target temperature range, and whether the indoor heat exchange coil needs to execute anti-freezing protection or not can be obtained according to the matching condition of the temperature of the indoor heat exchange coil and the second target temperature range. And then the target frequency of the compressor is determined by combining the matching conditions, so that the operating frequency of the compressor can be considered to meet the anti-freezing protection requirements of both the indoor heat exchanger inlet and the indoor heat exchange coil, and the adverse influence on the refrigeration of the air conditioner caused by executing the anti-freezing protection operation is reduced.
Referring to fig. 3, the processor obtains a target frequency of the compressor according to a matching condition of a temperature value of an inlet of the indoor heat exchanger and a first target temperature range and a matching condition of a temperature value of the indoor heat exchange coil and a second target temperature range, including:
s11, the processor determines a first frequency change rate according to the matching condition of the temperature value of the inlet of the indoor heat exchanger and the first target temperature range.
And S12, the processor determines a second frequency change rate according to the matching condition of the temperature value of the indoor heat exchange coil and a second target temperature range.
And S13, the processor obtains the target frequency of the compressor according to the current frequency, the first frequency change rate and the second frequency change rate.
Wherein T is imin 、T imax Representing a lower threshold value and an upper threshold value of the first target temperature range, respectively. T (T) pmin 、T pmax Representing a lower threshold value and an upper threshold value of the second target temperature range, respectively. First target temperature range= [ T imin ,T imax ) Second target temperature range= [ T pmin ,T pmax )，T pmin ＝T imin -ΔT，T pmax ＝T imax Delta T, delta T representing T pmin And T is imin And represents T pmax And T is imax And DeltaT of the difference of (1)>0℃。
Thus, when the air conditioner is operated in the cooling mode, the temperature value of the inlet of the indoor heat exchanger is smaller than the temperature value of the indoor heat exchange coil. For this purpose, different target temperature ranges are set for the indoor heat exchanger inlet and the indoor heat exchange coil, respectively. Meanwhile, the upper threshold of the first target temperature range is higher than the upper threshold of the second target temperature range, and the lower threshold of the first target temperature range is higher than the lower threshold of the second target temperature range. Compared with the control method adopted by the related art, the anti-freezing protection is not triggered in advance.
It should be noted that, because the temperature value of the inlet of the indoor heat exchanger is not equal to the temperature value of the indoor heat exchange coil, in the refrigeration mode, the temperature value of the inlet of the indoor heat exchanger is smaller than the temperature value of the indoor heat exchange coil. Provided T is taken imin And T is imax The setting of the temperature value of the indoor heat exchanger inlet and the indoor heat exchange coil is smaller or the same target temperature range is set, so that the anti-freezing protection can be triggered in advance. To this end, embodiments of the present disclosure set different target temperature ranges for the temperature values of the indoor heat exchanger inlet and the indoor heat exchange coil. At the same time T imin Above T pmin And T is imax Above T pmax To avoid triggering the freeze protection in advance.
Alternatively, the temperature is 2 ℃ or more and the temperature is less than or equal to 3 ℃. It should be noted that the specific value of Δt may be set according to the actual anti-freezing requirement.
Optionally, as shown in connection with fig. 4, the processor obtains the target frequency of the compressor according to the current frequency, the first frequency change rate, and the second frequency change rate, including:
s21, the processor adjusts the current frequency according to the first frequency change rate to obtain a first frequency.
In this step, the first rate of change of frequency is greater than zero and less than or equal to 0.5Hz/s.
And S22, the processor adjusts the current frequency according to the second frequency change rate to obtain a second frequency.
In this step, the second rate of change of frequency is greater than zero and less than or equal to 0.5Hz/s.
S23, the processor selects the minimum value of the first frequency and the second frequency as the target frequency of the compressor.
As an example, the first rate of change of frequency is 0.2Hz/s. The second rate of change of frequency is 0.5Hz/s. The processor adjusts the current frequency according to the first frequency change rate to obtain a first frequency, including: the processor decreases the current frequency at 0.2Hz/s to obtain a first frequency. The processor adjusts the current frequency according to the second frequency change rate to obtain a second frequency, comprising: the processor decreases the current frequency at 0.5Hz/s to obtain a second frequency.
As such, embodiments of the present disclosure adjust the current frequency according to a first rate of change of frequency to obtain a first frequency and adjust the current frequency according to a second rate of change of frequency to obtain a second frequency. And selecting the minimum value of the two as the target frequency of the compressor. If the maximum value of the two is selected as the target frequency of the compressor under the low-temperature refrigeration working condition of the air conditioner, the condition that the frequency of the compressor is reduced too fast can occur, so that the refrigeration effect is obviously deteriorated. Therefore, the method and the device select the minimum value of the two as the target frequency of the compressor under the low-temperature refrigeration working condition, and realize the tiny adjustment of the frequency of the compressor, thereby taking into account the anti-freezing protection requirements of the inlet of the indoor heat exchanger and the indoor heat exchange coil pipe, and ensuring the refrigeration effect of the air conditioner.
Optionally, the processor determines the first rate of change of frequency according to a match between the temperature value of the indoor heat exchanger inlet and the first target temperature range, including:
the processor is at T imin ≤T i <T imax In the case of (2), the first frequency change rate is determined to be 0.
The processor is at T limin ≤T i <T imin In the case of (2), the first frequency change rate is determined to be Δf.
The processor is at T i <T limin In the event of a compressor shutdown is determined.
Wherein T is i Representing the temperature value of the inlet of the indoor heat exchanger, T limin Representing a first lower threshold.
Thus, at T imin ≤T i <T imax And when the temperature value of the inlet of the indoor heat exchanger is in the first target temperature range, the freezing prevention protection is not needed, and the frequency of the compressor is not needed to be regulated. At T limin ≤T i <T imin And when the temperature value of the inlet of the indoor heat exchanger is lower than the lower limit threshold value of the first target temperature range and is greater than or equal to the first lower limit threshold value, the frequency of the compressor needs to be finely adjusted to achieve anti-freezing protection at the inlet of the indoor heat exchanger, and the first frequency change rate is determined to be delta f. At T i <T limin I.e. the temperature value at the inlet of the indoor heat exchanger is less than the first lower limit threshold, indicating that the temperature at the inlet of the indoor heat exchanger is very low. At this time, it is not preferable to continuously perform the cooling mode. Therefore, a compressor shutdown is determined. Thus, the frequency change rate can be set according to the matching condition of the temperature value at the inlet of the indoor heat exchanger, the first target temperature range and the first lower limit critical value, and the accurate adjustment of the frequency of the compressor at the inlet of the indoor heat exchanger is realized.
Optionally, the processor determines a second rate of change of frequency according to a match of the temperature value of the indoor heat exchange coil to a second target temperature range, including:
the processor is at T pmin ≤T p <T pmax In the case of (2), the second frequency change rate is determined to be 0.
The processor is at T lpmin ≤T p <T pmin In the case of (2), the second frequency change rate is determined to be Δf.
The processor is at T p <T lpmin In the event of a compressor shutdown is determined.
Wherein T is p Indicating the temperature value of the indoor heat exchange coil, T lpmin Represents a second lower threshold and T lpmin ＝T limin -ΔT。
Thus, at T pmin ≤T p <T pmax And when the temperature value of the indoor heat exchange coil is in the second target temperature range, the freezing prevention protection is not needed, and the frequency of the compressor is not needed to be regulated. At T lpmin ≤T p <T pmin When the temperature value of the indoor heat exchange coil is lower than the lower threshold value of the second target temperature range and is greater than or equal to the second lower threshold value, the frequency of the compressor needs to be finely adjusted to realize the anti-freezing protection of the indoor heat exchange coil, and the second frequency change is determinedThe rate is Δf. At T p <T lpmin I.e. when the temperature value of the indoor heat exchange coil is less than the second lower limit critical value, the temperature of the indoor heat exchange coil is extremely low. At this time, it is not preferable to continuously perform the cooling mode. Therefore, a compressor shutdown is determined. Therefore, the frequency change rate can be set according to the matching condition of the temperature value of the indoor heat exchange coil, the second target temperature range and the second lower limit critical value, and accurate adjustment of the frequency of the compressor of the indoor heat exchange coil is achieved.
As shown in fig. 5, an embodiment of the present disclosure provides another anti-freezing control method for an air conditioner, including:
s31, the processor acquires the temperature value of the inlet of the indoor heat exchanger and the temperature value of the indoor heat exchange coil under the condition that the air conditioner operates in an anti-freezing mode.
S32, the processor obtains the target frequency of the compressor according to the matching condition of the temperature value of the inlet of the indoor heat exchanger and the first target temperature range and the matching condition of the temperature value of the indoor heat exchange coil and the second target temperature range.
S33, the processor controls the compressor to run at a target frequency so as to realize the anti-freezing protection of the indoor heat exchanger.
S34, the processor acquires the new temperature value of the inlet of the indoor heat exchanger and the new temperature value of the indoor heat exchange coil again.
S35, the new temperature value of the processor at the inlet of the indoor heat exchanger is greater than or equal to T imax +2 ℃ and the new temperature value of the indoor heat exchange coil is greater than or equal to T imax In the case of ΔT+2deg.C, the anti-freeze mode is stopped.
By adopting the anti-freezing control method for the air conditioner, which is provided by the embodiment of the disclosure, after the compressor is controlled to run at the target frequency, the temperature value of the inlet of the indoor heat exchanger and the temperature value of the indoor heat exchange coil are continuously monitored, and the new temperature value of the inlet of the indoor heat exchanger is greater than or equal to T imax +2 ℃ and the new temperature value of the internal heat exchange coil is greater than or equal to T imax at-DeltaT+2deg.C, it is determined that antifreeze at the inlet of the indoor heat exchanger and at the indoor heat exchange coil has been successfully achievedAnd (5) junction protection. Therefore, the execution of the freeze-proof mode is stopped. Therefore, the embodiment of the disclosure can prevent the indoor heat exchanger from frosting or even freezing according to the respective frostproofing requirements reflected by the inlet of the indoor heat exchanger, the temperature value and the temperature value of the indoor heat exchanger coil pipe aiming at the air conditioner under the low-temperature refrigeration working condition, and the adverse effect on the refrigeration of the air conditioner caused by the frosting or freezing of the indoor heat exchanger is reduced as much as possible.
Optionally, the processor determines that the air conditioner is operating in the anti-freeze mode as follows:
the processor obtains the outdoor temperature value T ao ；
The processor is at T ao ≤T threshold In the case of (2), the freeze-proof mode is performed.
Wherein, T is more than or equal to 8 DEG C threshold ≤16℃。
Thus, when the outdoor temperature value is low, for example, when the air conditioner is installed in a space with refrigeration requirements such as a monitoring room and a control room, the user can cause discomfort when the wind speed of the indoor fan is too high in the space, so that the wind speed value of the indoor fan is set to be a low value to ensure the comfort of the user. Under the condition, the indoor heat exchanger cannot exchange heat sufficiently due to low-wind-speed operation of the indoor fan, and the indoor heat exchanger is extremely prone to frosting and even icing. To this end, embodiments of the present disclosure are described at T ao ≤T threshold And executing an anti-freezing mode to avoid the freezing condition of the indoor heat exchanger.
In practical application, the anti-freezing control method for the air conditioner specifically executes the following steps:
s101: the processor obtains the temperature value T of the inlet of the indoor heat exchanger under the condition that the air conditioner operates in the anti-freezing mode i Temperature value T of indoor heat exchange coil p 。
S102: confirmed T limin ≤T i <T imin And determining the first frequency change rate as delta f, and adjusting the current frequency according to delta f to obtain the first frequency.
S103: is confirmed byLet T pmin ≤T p <T pmax The second frequency change rate is determined to be 0 and the current frequency is determined to be the second frequency.
S104: the processor selects the minimum value of the first frequency and the second frequency as a target frequency, and controls the compressor to run at the target frequency so as to realize the anti-freezing protection of the indoor heat exchanger.
S105: the processor re-acquires a new temperature value T of the inlet of the indoor heat exchanger i * New temperature value T of indoor heat exchange coil p *。
S106, confirmed, T i *≥T imax +2 ℃ and T p *≥T imax - Δt+2deg.C, the anti-freeze mode is exited.
As shown in connection with fig. 6, an embodiment of the present disclosure provides an anti-freezing control apparatus 300 for an air conditioner, including a processor (processor) 400 and a memory (memory) 401. Optionally, the apparatus may further comprise a communication interface (Communication Interface) 402 and a bus 403. The processor 400, the communication interface 402, and the memory 401 may communicate with each other via the bus 403. The communication interface 402 may be used for information transfer. The processor 400 may call logic instructions in the memory 401 to perform the anti-freezing control method for an air conditioner of the above-described embodiment.
Further, the logic instructions in the memory 401 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.
The memory 401 is a computer readable storage medium, and may be used to store a software program, a computer executable program, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 400 performs functional applications and data processing by executing program instructions/modules stored in the memory 401, i.e., implements the anti-freezing control method for an air conditioner in the above-described embodiment.
Memory 401 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, at least one application program required for a function; the storage data area may store data created according to the use of the terminal device, etc. In addition, memory 401 may include high-speed random access memory, and may also include nonvolatile memory.
As shown in conjunction with fig. 7, an embodiment of the present disclosure provides an air conditioner 600, including: the main refrigerant flow path, the indoor heat exchanger, and the above-described anti-freezing control device 300 for an air conditioner. And a main refrigerant flow path configured with a first sensor for detecting the temperature value of the indoor heat exchanger inlet. An indoor heat exchanger is provided with an indoor heat exchange coil and a second sensor for detecting the temperature value of the indoor heat exchange coil. The refrigerant flowing through the main refrigerant flow path passes through the inlet of the indoor heat exchanger and then flows into the indoor heat exchange coil through the split-flow treatment to realize heat exchange treatment. The anti-freezing control device 300 for an air conditioner is installed at an indoor heat exchanger. The mounting relationships described herein are not limited to placement within a product, but include mounting connections to other components of a product, including but not limited to physical, electrical, or signal transmission connections, etc. It will be appreciated by those skilled in the art that the anti-freeze control device 300 for an air conditioner may be adapted to a viable product body, thereby achieving other viable embodiments.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described anti-freezing control method for an air conditioner.
The computer readable storage medium may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
Embodiments of the present disclosure may be embodied in a software product stored on a storage medium, including one or more instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of a method according to embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium including: a plurality of media capable of storing program codes, such as a usb 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 a transitory storage medium.
The above description and the drawings illustrate embodiments of the disclosure sufficiently to enable those skilled in the art to practice them. Other embodiments may involve structural, logical, electrical, process, and other changes. The embodiments represent only possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in, or substituted for, those of others. Moreover, the terminology used in the present application is for the purpose of describing embodiments only and is not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a," "an," and "the" (the) are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this disclosure is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, when used in the present disclosure, the terms "comprises," "comprising," and/or variations thereof, mean that the recited features, integers, steps, operations, elements, and/or components are present, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising one …" does not exclude the presence of other like elements in a process, method or apparatus comprising such elements. In this context, each embodiment may be described with emphasis on the differences from the other embodiments, and the same similar parts between the various embodiments may be referred to each other. For the methods, products, etc. disclosed in the embodiments, if they correspond to the method sections disclosed in the embodiments, the description of the method sections may be referred to for relevance.
Those of skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the solution. The skilled artisan may use different methods for each particular application to achieve the described functionality, but such implementation should not be considered to be beyond the scope of the embodiments of the present disclosure. It will be clearly understood by those skilled in the art that, for convenience and brevity of description, specific working procedures of the above-described systems, apparatuses and units may refer to corresponding procedures in the foregoing method embodiments, which are not repeated herein.
In the embodiments disclosed herein, the disclosed methods, articles of manufacture (including but not limited to devices, apparatuses, etc.) may be practiced in other ways. For example, the apparatus embodiments described above are merely illustrative, and for example, the division of the units may be merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. In addition, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interface, device or unit indirect coupling or communication connection, which may be in electrical, mechanical or other form. The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units may be selected according to actual needs to implement the present embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit.
The flowcharts and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. In the description corresponding to the flowcharts and block diagrams in the figures, operations or steps corresponding to different blocks may also occur in different orders than that disclosed in the description, and sometimes no specific order exists between different operations or steps. For example, two consecutive operations or steps may actually be performed substantially in parallel, they may sometimes be performed in reverse order, which may be dependent on the functions involved. Each block of the block diagrams and/or flowchart illustration, and combinations of blocks in the block diagrams and/or flowchart illustration, can be implemented by special purpose hardware-based systems which perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. An anti-freezing control method for an air conditioner, wherein refrigerant flowing through a main refrigerant flow path flows into an indoor heat exchange coil through a split-flow process after passing through an inlet of the indoor heat exchanger, the method comprising:
under the condition that the air conditioner operates in an anti-freezing mode, acquiring a temperature value of an inlet of the indoor heat exchanger and a temperature value of the indoor heat exchange coil;
obtaining target frequency of the compressor according to the matching condition of the temperature value of the inlet of the indoor heat exchanger and the first target temperature range and the matching condition of the temperature value of the indoor heat exchange coil and the second target temperature range;
the compressor is controlled to run at a target frequency to realize the anti-freezing protection of the indoor heat exchanger.
2. The method of claim 1, wherein the obtaining the target frequency of the compressor based on the matching of the temperature value of the indoor heat exchanger inlet to the first target temperature range and the matching of the temperature value of the indoor heat exchange coil to the second target temperature range comprises:
determining a first frequency change rate according to the matching condition of the temperature value of the inlet of the indoor heat exchanger and a first target temperature range;
determining a second frequency change rate according to the matching condition of the temperature value of the indoor heat exchange coil and a second target temperature range;
obtaining a target frequency of the compressor according to the current frequency, the first frequency change rate and the second frequency change rate;
wherein the first target temperature range= [ T ] imin ,T imax ) Second target temperature range= [ T pmin ,T pmax )，T pmin ＝T imin -ΔT，T pmax ＝T imax -ΔT，ΔT>0℃。
3. The method of claim 2, wherein obtaining the target frequency of the compressor based on the current frequency, the first rate of change of frequency, and the second rate of change of frequency comprises:
adjusting the current frequency according to the first frequency change rate to obtain a first frequency;
adjusting the current frequency according to the second frequency change rate to obtain a second frequency;
and selecting the minimum value of the first frequency and the second frequency as the target frequency of the compressor.
4. The method of claim 2, wherein determining the first rate of change of frequency based on a match of the temperature value of the indoor heat exchanger inlet to the first target temperature range comprises:
at T imin ≤T i <T imax In the above, determining that the first frequency change rate is 0;
at T limin ≤T i <T imin In the case of (2), determining that the first frequency change rate is Δf;
at T i <T limin Determining that the compressor is shut down;
wherein T is i Representing the temperature value of the inlet of the indoor heat exchanger, T limin Representing a first lower threshold.
5. The method of claim 2, wherein determining the second rate of change of frequency based on a match of the temperature value of the indoor heat exchange coil to the second target temperature range comprises:
at T pmin ≤T p <T pmax In the case of (2), determining that the second rate of change of frequency is 0;
at T lpmin ≤T p <T pmin In the case of (2), determining the second frequency change rate as Δf;
at T p <T lpmin Determining that the compressor is shut down;
wherein T is p Indicating the temperature value of the indoor heat exchange coil, T lpmin Represents a second lower threshold and T lpmin ＝T limin -ΔT。
6. The method of claim 2, wherein ΔT is 2 ℃ or less than 3 ℃.
7. The method of any one of claims 1 to 6, wherein the controlling the compressor to operate at the target frequency further comprises:
re-acquiring a new temperature value of an inlet of the indoor heat exchanger and a new temperature value of the indoor heat exchange coil;
the new temperature value at the inlet of the indoor heat exchanger is greater than or equal to T imax +2 ℃ and the new temperature value of the indoor heat exchange coil is greater than or equal to T imax In the case of ΔT+2deg.C, the anti-freeze mode is stopped.
8. An anti-freezing control device for an air conditioner, comprising a processor and a memory storing program instructions, characterized in that the processor is configured to execute the anti-freezing control method for an air conditioner according to any one of claims 1 to 7 when the program instructions are executed.
9. An air conditioner, comprising:
a main refrigerant flow path configured with a first sensor for detecting a temperature value of an inlet of the indoor heat exchanger;
the indoor heat exchanger is provided with an indoor heat exchange coil and a second sensor for detecting the temperature value of the indoor heat exchange coil, and the refrigerant flowing through the main refrigerant flow path flows into the indoor heat exchange coil through the diversion treatment after passing through the inlet of the indoor heat exchanger to realize heat exchange treatment; the method comprises the steps of,
the anti-freezing control device for an air conditioner as claimed in claim 8, mounted to the indoor heat exchanger.
10. A storage medium storing program instructions that, when executed, perform the anti-freezing control method for an air conditioner according to any one of claims 1 to 7.
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|---|---|---|---|
| CN202310531434.3A CN116592490A (en) | 2023-05-11 | 2023-05-11 | Anti-freezing control method and device for air conditioner, air conditioner and storage medium |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310531434.3A CN116592490A (en) | 2023-05-11 | 2023-05-11 | Anti-freezing control method and device for air conditioner, air conditioner and storage medium |
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| CN (1) | CN116592490A (en) |
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