CN112146260A - Method and device for preventing condensation of air conditioner and air conditioner - Google Patents
Method and device for preventing condensation of air conditioner and air conditioner Download PDFInfo
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- CN112146260A CN112146260A CN202010948651.9A CN202010948651A CN112146260A CN 112146260 A CN112146260 A CN 112146260A CN 202010948651 A CN202010948651 A CN 202010948651A CN 112146260 A CN112146260 A CN 112146260A
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
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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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- 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
- F24F11/70—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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/22—Means for preventing condensation or evacuating condensate
- F24F2013/221—Means for preventing condensation or evacuating condensate to avoid the formation of condensate, e.g. dew
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Abstract
The application relates to the technical field of air conditioners and discloses a method for preventing condensation of an air conditioner. The method for preventing condensation of the air conditioner comprises the following steps: when the air conditioner operates in a refrigerating mode, whether the indoor unit meets a condensation condition is determined; and when the indoor unit meets the condensation condition, controlling to heat a liquid inlet refrigerant of the indoor unit, wherein the heating power is obtained according to the running frequency of the compressor. The method for preventing condensation of the air conditioner provided by the embodiment of the disclosure is characterized in that when an indoor unit meets a condensation condition, a refrigerant flowing into the indoor unit is heated, so that the condensation temperature condition of the indoor unit is changed in a manner of raising the temperature of the refrigerant; the heating power is adjusted according to the running frequency of the compressor in the control process, the heating power is changed to serve as a supplementary regulation measure for limiting influence of the running frequency of the compressor on regulation and control of the temperature of the liquid inlet refrigerant, and the condensation problem of the indoor unit is reduced by coordinating the heating power and the running frequency of the compressor. The application also provides a device and an air conditioner for preventing condensation of the air conditioner.
Description
Technical Field
The application relates to the technical field of intelligent household appliances, in particular to a method and a device for preventing condensation of an air conditioner and the air conditioner.
Background
With the development and progress of society and science and technology, daily electric products which benefit thousands of households are also emerging, for example, air-conditioning products which effectively improve and maintain indoor comfortable temperature environment under the conditions of high temperature in summer or severe cold weather in winter, and the popularization of household air conditioners, central air conditioners and the like can gradually expose problems existing in the use process while improving the living standard of residents, wherein one problem is that the air conditioner is easy to be condensed in an indoor unit when running under the high-humidity environment.
The reason for causing the air conditioner to generate the condensation mainly comprises external factors and internal factors, wherein the external factors are that the temperature and the humidity of the indoor environment where the air conditioner is located at present are high, the amount of water vapor contained in the air is large, and the internal factors are that the temperature of a refrigerant flowing into the indoor unit is too low during the refrigeration operation of the air conditioner, so that a large amount of water vapor in the air flowing through the indoor unit is condensed and condensed into liquid condensation drops, and the condensation problem is caused.
Aiming at the air conditioner condensation problem, a part of air conditioner products are additionally provided with an anti-condensation function so as to inhibit the condensation amount and even eliminate the condensation by starting the anti-condensation function when the air conditioner has the condensation problem.
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:
in the related art, the anti-condensation function is mainly achieved by adjusting the frequency of a compressor (for example, reducing the frequency) or the throttle opening degree of an electronic expansion valve (for example, increasing the opening degree), and the like, wherein the adjustment of the frequency of the compressor can cause the change of the quantity of the discharged refrigerant, and the adjustment of the throttle opening degree of the electronic expansion valve can also cause the change of the inflow flow rate of an indoor unit.
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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a method and a device for preventing condensation of an air conditioner and the air conditioner, and aims to solve the technical problem that condensation is easy to occur when an indoor unit is operated in a refrigerating mode in the related art.
In some embodiments, a method for air conditioning anti-condensation, comprising:
when the air conditioner operates in a refrigerating mode, whether the indoor unit meets a condensation condition is determined;
and when the indoor unit meets the condensation condition, controlling to heat a liquid inlet refrigerant of the indoor unit, wherein the heating power is obtained according to the running frequency of the compressor.
In some alternative embodiments, the obtaining of the heating power according to the operating frequency of the compressor comprises:
acquiring corresponding heating power from a preset incidence relation according to the running frequency of the compressor; wherein the correlation includes a one-to-one correspondence of operating frequency and heating power of one or more sets of compressors.
In some optional embodiments, the preset association relationship comprises a target association relationship;
before acquiring corresponding heating power from a preset incidence relation according to the operating frequency of the compressor, the method for preventing condensation of the air conditioner further comprises the following steps:
acquiring temperature change trends of liquid inlet refrigerants of the indoor unit, wherein the temperature change trends comprise a temperature rise trend and a temperature drop trend;
determining a target incidence relation from a preset incidence relation set based on the temperature variation trend; the incidence relation set comprises a first incidence relation corresponding to one or more temperature rising trends and a second incidence relation corresponding to one or more temperature lowering trends.
In some optional embodiments, in the first correlation, the operation power of the compressor and the heating power are positively correlated; and/or in the second correlation, the running power of the compressor and the heating power are in negative correlation.
In some optional embodiments, determining the target association relationship from a preset association relationship set includes: determining the temperature rising rate of the temperature rising trend of the liquid inlet refrigerant; acquiring a target incidence relation from a plurality of first incidence relations according to the temperature rise rate; and/or the presence of a gas in the gas,
determining a target incidence relation from a preset incidence relation set, wherein the target incidence relation comprises the following steps: determining the cooling rate of the cooling trend of the liquid inlet refrigerant; and acquiring a target incidence relation from the plurality of second incidence relations according to the temperature rise rate.
In some optional embodiments, the liquid inlet refrigerant of the indoor unit is heated by a heating device;
the method for preventing condensation of the air conditioner further comprises the following steps:
when a liquid inlet refrigerant of an indoor unit is heated, the running current of a heating device is obtained;
and executing corresponding protection actions according to an overcurrent protection strategy based on the operating current of the heating device.
In some alternative embodiments, the overcurrent protection strategy includes:
when A is1＝A0When the frequency is lower than the current running frequency, the compressor of the air conditioner maintains the current running frequency or reduces the frequency;
when A is1＞A0When the temperature is higher than the set temperature, the heating power of the heating device is reduced;
when A is1＞A0And P is1＝PMinimum sizeReducing the frequency of a compressor of the air conditioner;
wherein A is1For the operating current of the heating device, A0Is the current protection threshold of the heating device, P1Is the heating power of the heating device,Pminimum sizeIs the minimum heating power of the heating device.
In various alternative embodiments described above, the condensation conditions include:
Tinner coiled pipe-TDew point≤△T1；
Wherein, TInner coiled pipeIs the temperature of the inner coil, TDew pointThe delta T1 is the preset temperature difference threshold value for the current indoor dew point temperature.
In some embodiments, the device for preventing condensation of an air conditioner comprises a processor and a memory storing program instructions, and is characterized in that the processor is configured to execute any one of the air supply control methods shown in the above embodiments when executing the program instructions.
In some embodiments, the air conditioner disclosed in the embodiments of the present disclosure includes a device for preventing condensation of the air conditioner as shown in the above embodiments.
The method for preventing condensation of the air conditioner, provided by the embodiment of the disclosure, can realize the following technical effects:
the method for preventing condensation of the air conditioner provided by the embodiment of the disclosure is characterized in that when an indoor unit meets a condensation condition, namely, under the condition that the indoor unit possibly has or already has a condensation problem, a refrigerant flowing into the indoor unit is heated, so that the temperature condition of condensation of the indoor unit is changed in a manner of increasing the temperature of the refrigerant, and the purpose of reducing condensation is achieved; heating power is adjusted according to the operating frequency of compressor in the control process to adjust and control the limited supplementary regulation and control measure of influence as compressor operating frequency to feed liquor refrigerant temperature regulation and control through changing heating power, therefore this application can coordinate heating power and compressor operating frequency, reduces the appearance of indoor set condensation problem jointly.
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 in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic structural diagram of an indoor heat exchanger of an air conditioner provided in an embodiment of the present disclosure;
FIG. 2 is a schematic flow chart diagram illustrating a method for preventing condensation of an air conditioner according to an embodiment of the present disclosure;
FIG. 3 is a schematic flow chart diagram illustrating a method for preventing condensation of an air conditioner according to still another embodiment of the present disclosure;
FIG. 4 is a schematic view of an apparatus for preventing condensation of an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic view illustrating an apparatus for preventing condensation of an air conditioner according to still another embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. 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 be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The terms "first," "second," and the like in the description and in the claims, and the above-described drawings of embodiments of the present disclosure, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It should be understood that the data so used may be interchanged under appropriate circumstances such that embodiments of the present disclosure described herein may be made. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
The term "plurality" means two or more unless otherwise specified.
In the embodiment of the present disclosure, the character "/" indicates that the preceding and following objects are in an or relationship. For example, A/B represents: a or B.
The term "and/or" is an associative relationship that describes objects, meaning that three relationships may exist. For example, a and/or B, represents: a or B, or A and B.
In an optional embodiment, the air conditioner comprises an indoor unit and an outdoor unit, wherein the indoor unit is provided with an indoor heat exchanger, an indoor fan and the like and can be used for realizing the functions of heat exchange and the like between a refrigerant and an indoor environment in a matching way; the outdoor unit is provided with an outdoor heat exchanger, an outdoor fan, a throttle valve, a compressor, a gas-liquid separator and the like, and can be used for realizing the functions of heat exchange, refrigerant compression, refrigerant throttling and the like by matching with a refrigerant and an outdoor environment.
The indoor heat exchanger, the outdoor heat exchanger, the throttle valve, the compressor, the gas-liquid separator and other components are connected through refrigerant pipelines to form a refrigerant circulating system for circularly conveying the refrigerant between the indoor unit and the outdoor unit; optionally, the refrigerant circulation system is at least limited to two refrigerant flow directions respectively used for a refrigeration mode or a heating mode, specifically, when the air conditioner operates in the refrigeration mode, the refrigerant circulation system conveys the refrigerant in a first refrigerant flow direction, and after being discharged from the compressor, the refrigerant sequentially flows through the outdoor heat exchanger, the throttle valve and the indoor heat exchanger, and then flows back to the compressor through the gas-liquid separator; and when the air conditioner operates in a heating mode, the refrigerant circulating system conveys the refrigerant in a second refrigerant flow direction, and the refrigerant flows through the indoor heat exchanger, the throttle valve and the outdoor heat exchanger in sequence after being discharged from the compressor and then flows back to the compressor through the gas-liquid separator.
The condensation problem related to the embodiments of the present disclosure mainly occurs in a high-temperature and high-humidity environment in summer, and at this time, the operation mode of the air conditioner is generally a cooling mode, so the embodiments of the present disclosure mainly perform corresponding control on the air conditioner in a refrigerant flow direction in the cooling mode.
In an optional embodiment, a refrigerant inflow port of the indoor heat exchanger in the cooling mode is provided with a heating device, and the heating device can be controlled to start or stop heating and can heat the refrigerant flowing through the refrigerant inflow port when the heating device starts heating; through the heating of the heating device, the heat of the refrigerant flowing through the refrigerant inflow port can be increased, the temperature of the refrigerant is increased, and therefore the refrigerant can flow into the indoor heat exchanger at a higher temperature compared with the refrigerant after being throttled by the throttle valve.
Here, the surface temperature of the indoor heat exchanger of the indoor unit is mainly affected by the temperature of the refrigerant flowing through the indoor heat exchanger, and the temperatures of the indoor heat exchanger and the refrigerant are in a positive correlation relationship, that is, if the temperature of the refrigerant flowing into the indoor heat exchanger is low, the surface temperature of the indoor heat exchanger affected by the temperature is also low; otherwise, the surface temperature of the indoor heat exchanger is high. Like this, through the heating control to heating device, can be through exerting the influence to the refrigerant temperature that flows in, and then change indoor heat exchanger's surface temperature to take place the necessary temperature conditions of condensation and adjust on the indoor heat exchanger, in order to reach the effect that reduces the condensation and clear away the condensation even.
Alternatively, the type of heating device includes, but is not limited to, a resistive heating device, an electromagnetic heating device, and the like. It should be understood that other types of heating devices in the related art that can be applied to directly heat a fluid or to heat a pipe to indirectly heat a fluid can be applied to the air conditioner of the present application, and thus, should be covered within the scope of the present application.
Fig. 1 shows an alternative embodiment of an indoor heat exchanger provided with an electromagnetic heating device 2 at a refrigerant inflow port 11, and the indoor heat exchanger includes a heat exchanger body 1, and a refrigerant inflow port 11 and a refrigerant outflow port 12, where the definition of refrigerant inflow or outflow corresponds to the cooling flow direction defined by a cooling mode. The electromagnetic heating device 2 is disposed at the refrigerant inflow port 11 of the heat exchanger body 1, and the refrigerant flowing into the indoor heat exchanger through the refrigerant inflow port 11 in the refrigeration mode is a throttled low-temperature refrigerant, so that the temperature of the throttled refrigerant can be effectively increased by starting the electromagnetic heating device 2 to heat the refrigerant.
Alternatively, the electromagnetic heating device 2 includes a heating tube body connected in series to the refrigerant inflow port 11, and a heating coil spirally wound around the periphery of the heating tube body, and the heating coil is connectable to a power supply circuit of the air conditioner, so that start/stop control of the electromagnetic heating device can be realized by on/off control of the power supply circuit of the heating coil, and adjustment of heating power/heating amount of the electromagnetic heating device can be changed by control of parameters such as current/voltage supplied to the heating coil.
In some embodiments, the heating tube body may be made of a metal material having a magnetic conductive property, such as iron and aluminum alloy, and the material is selected to meet the requirement of the magnetic conductive property, and because the heating tube body is connected in series to the refrigerant circulation pipeline, the connection position between the heating tube body and the refrigerant circulation pipeline is easily subjected to more stress, and meanwhile, the refrigerant impact pressure may also greatly affect the strength of the tube body and the stress at the connection position, so that the selected material also needs to meet a certain strength requirement.
In addition, the heating pipe body generates more heat under the action of electromagnetism, and the temperature of the heating pipe body is easy to rise to higher temperature, so that the selected material also needs to have certain temperature deformation resistance requirement, adverse effects such as thermal expansion deformation caused by the temperature rise of the pipe body are reduced, and the problems of deformation, breakage and the like of the pipeline are reduced.
Referring to fig. 2, an embodiment of the present disclosure provides a method for preventing condensation of an air conditioner, which can be applied to condensation prevention control of indoor units of various air conditioners, such as a wall-mounted air conditioner, a floor air conditioner, a window air conditioner, and a central air conditioner; the method mainly comprises the following steps:
s201, when an air conditioner operates in a refrigerating mode, whether an indoor unit meets a condensation condition is determined;
in some optional embodiments, before performing step S201, the step further includes acquiring a current operation mode of the air conditioner; if the current operation mode of the air conditioner is the refrigeration mode, executing step S201; if the current operation mode of the air conditioner is not the cooling mode, the control flow in this embodiment is not executed.
Here, when the current operation mode of the air conditioner is not the cooling mode, such as the heating mode, the problem of condensation generally does not occur inside the indoor unit under the indoor working condition at this time, and the air conditioner does not have a condensation prevention requirement, so the control flow in this embodiment is not executed.
In some alternative embodiments, the condensation conditions include:
Tinner coiled pipe-TDew point≤△T1；
Wherein, TInner coiled pipeIs the temperature of the inner coil, TDew pointThe delta T1 is the preset temperature difference threshold value for the current indoor dew point temperature.
In some optional embodiments, the value range of Δ T1 is 0.5-1.5 ℃, and the specific value can be determined according to actual needs, such as 0.5 ℃, 1 ℃, 1.5 ℃, and the like.
The dew point temperature is the temperature corresponding to the saturation of water vapor in the air; when the actual temperature is lower than the dew point temperature, part of water vapor in the air can be condensed into liquid dew. The reason why the air conditioner has the condensation problem is that the temperature of the refrigerant flowing into the indoor heat exchanger is low, the surface temperature of the indoor heat exchanger is reduced, and more water vapor in the indoor air flowing through the indoor heat exchanger driven by the indoor fan is gradually condensed into liquid dew on the indoor heat exchanger.
Although the mode of comparing the temperature of the inner coil of the indoor heat exchanger with the condensation temperature can intuitively determine whether the temperature condition of condensation is met, when the temperature of the inner coil is determined to be lower than the condensation temperature, the condensation problem generally occurs at the moment, and the indoor heat exchanger is condensed with dew water drops, so that the problem of hysteresis exists in the judging mode; compared with the above judgment method, the condensation condition shown in this embodiment is that the magnitude relation between the temperature difference value between the temperature of the inner coil and the current indoor dew point temperature and the preset temperature difference threshold is compared, and when the temperature difference is smaller than or equal to the preset temperature difference threshold, it is described that the current surface temperature state of the indoor heat exchanger of the air conditioner is close to the temperature state of condensation but no condensation occurs yet, so that the corresponding condensation preventing operation is controlled to be executed when the condensation condition is met, the surface temperature of the indoor heat exchanger can be directly changed, the temperature state of condensation is adjusted to be not generated, and the purpose of avoiding condensation in advance is achieved.
In some optional embodiments, a temperature sensor is arranged at the coil position of the indoor unit, and the temperature sensor can detect the temperature of the coil position of the indoor unit in real time; therefore, the temperature of the inner coil pipe for determining the condensation condition in the embodiment can be obtained by the temperature sensor.
S202, when the indoor unit meets a condensation condition, acquiring the running frequency of a compressor;
in this embodiment, when the indoor unit meets the condensation condition, it is described that the current operation state of the air conditioner has a tendency of condensation of the indoor unit, and therefore, a preset condensation preventing operation needs to be controlled and executed, and the condensation tendency is delayed or eliminated through the condensation preventing operation, so that the air conditioner can always maintain a state of little condensation or no condensation in the cooling mode, and the overall operation performance of the air conditioner is improved.
In this embodiment, the preset anti-condensation operation is to adjust and control the heating power of the heating device to change the temperature of the refrigerant flowing into the indoor unit; here, the heating power of the heating device in the present application is the operating frequency of the compressor, so step S202 needs to be executed to obtain the current operating frequency of the compressor.
And S203, acquiring heating power according to the running frequency of the compressor, and heating the liquid inlet refrigerant of the indoor unit according to the heating power control.
In some optional embodiments, the operation of controlling to heat the liquid refrigerant entering the indoor unit in step S203 is implemented by the heating device shown above; specifically, when the indoor unit satisfies the condensation condition, the liquid inlet refrigerant of the indoor unit is heated by heat generated by the heating device, and when the indoor unit does not satisfy the condensation condition, the heating device is kept in a stop state, and at the moment, the refrigerant is not heated by the heating device. The method for preventing condensation of the air conditioner provided by the embodiment of the disclosure is to heat the refrigerant flowing into the indoor unit when the indoor unit meets the condensation condition, namely, under the condition that the indoor unit possibly has or has the condensation problem, so as to change the temperature condition of the indoor unit, which has condensation, in a manner of raising the temperature of the refrigerant, thereby achieving the purpose of reducing condensation.
In the process that the air conditioner operates in a mode that condensation easily occurs in an indoor unit such as a refrigeration mode, a refrigerant is discharged by the compressor and then sequentially flows into the indoor heat exchanger after passing through the outdoor heat exchanger and the throttling device, wherein the high and low of the discharge temperature of the compressor are greatly influenced by the current operating frequency of the compressor, the high and low of the discharge temperature of the compressor basically form a positive correlation relationship, and the high and low of the discharge temperature can further influence the temperature of the refrigerant flowing into the indoor heat exchanger, so that the current operating frequency of the compressor can influence the condensation state of the air conditioner in the refrigeration mode; the refrigerant flow of above-mentioned injecing is down, the refrigerant flows through the height of the outdoor environment that outdoor heat exchanger corresponds, throttling arrangement's aperture size also can influence the temperature state of refrigerant, therefore the operating frequency of compressor is more limited and the error appears easily to the regulation and control influence of indoor set feed liquor refrigerant temperature, then adjust heating power according to the operating frequency of compressor in this embodiment, with regard as compressor operating frequency to the limited supplementary regulation and control measure of feed liquor refrigerant temperature regulation and control influence through changing heating power, make heating arrangement's actual heating power can be more accurate match compressor current running state, also can avoid the extra consumption that heating power too high and cause simultaneously, this application reduces the appearance of indoor set condensation problem jointly through coordinating heating power and compressor operating frequency.
In some optional real-time modes, the step S203 of "obtaining heating power according to the operating frequency of the compressor" includes: and acquiring corresponding heating power from a preset incidence relation according to the running frequency of the compressor.
The air conditioner is preset with at least one incidence relation, and the incidence relation comprises one-to-one correspondence relation between the operating frequency and the heating power of one or more groups of compressors. Illustratively, table 1 shows an optional correlation that collectively defines n sets of operating frequencies and heating powers, as shown in the following table,
TABLE 1
Therefore, in step S203, the heating power matched with the current operating frequency of the compressor can be obtained by looking up the correlation shown in table 1, and the operating state of the heating device is adjusted according to the heating power.
In still other alternative embodiments, the association relationship selected each time the control flow is executed is defined as a target association relationship.
When the air conditioner operates in a cooling mode, the change of factors such as outdoor environment temperature, indoor environment temperature, self operating parameters of the air conditioner and the like can enable the temperature of the refrigerant flowing into the indoor heat exchanger to show a certain temperature change trend in certain time intervals, for example, when the compressor operates in an up-conversion mode, the exhaust temperature is increased along with the increase of the operating frequency of the compressor, and the temperature of the refrigerant flowing into the indoor heat exchanger also shows a certain up-conversion trend; or, under the condition that the outdoor environment temperature is reduced, the refrigerant flows through the outdoor heat exchanger to increase the heat dissipation capacity, so that the temperature of the refrigerant flowing into the indoor heat exchanger also presents a certain descending trend, and the like; in this embodiment, the corresponding association relationship is further selected according to the temperature variation trend of the refrigerant flowing into the indoor heat exchanger, so that the adjusted heating power can be adapted to the current temperature variation trend and the state of the compressor.
In this embodiment, before obtaining the corresponding heating power from the preset association relationship according to the operating frequency of the compressor, the method for preventing condensation of the air conditioner further includes: acquiring the temperature change trend of a liquid inlet refrigerant of an indoor unit; and determining a target incidence relation from a preset incidence relation set based on the temperature change trend.
Optionally, the temperature change trend includes a temperature increase trend and a temperature decrease trend. The temperature rising trend refers to a trend that the temperature generally shows a gradual rising change, and the temperature falling trend refers to a trend that the temperature generally shows a gradual falling change.
Here, taking the time when the indoor unit satisfies the condensation condition as the reference time, the temperature change in the first set time period before the reference time may be selected as the reference temperature for determining the temperature change trend, for example, setting the reference time as T0, and setting the time corresponding to the first set time period before the reference time as T1(T1 is before T0), where the temperature of the inlet refrigerant corresponding to the time T0 is T0, and the temperature of the inlet refrigerant corresponding to the time T1 is T1, and comparing the magnitudes of the temperature values between T0 and T1 may determine the temperature change trend, specifically including: when T0 is more than T1, the temperature change trend is a cooling trend; in the case of T0 < T1, the temperature trend is a rising temperature trend.
Optionally, the first set time period is 30s, 1min, 2min, and so on.
Similarly, optionally, the temperature change in the second set time period after the reference time may be used as the reference temperature for determining the temperature change trend, for example, if the time corresponding to the second set time period after the reference time is T2(T2 is after T0), and the temperature of the inlet refrigerant corresponding to the time T2 is T2, the temperature change trend may be determined by comparing the temperature values between T0 and T2.
Here, within the second set time period, the heating device does not heat the liquid inlet refrigerant until the target association relation is selected, so as to avoid the heating influence of the starting of the heating device on the temperature of the liquid inlet refrigerant.
Optionally, the second set time period is 30s, 1min, 2min, and so on.
In this embodiment, the association set includes a first association corresponding to one or more temperature increasing trends and a second association corresponding to one or more temperature decreasing trends. Therefore, when the temperature of the liquid inlet refrigerant of the indoor heat exchanger is determined to be in a temperature rising trend, one of the first incidence relations is selected as a target incidence relation; or when the temperature of the liquid inlet refrigerant of the indoor heat exchanger is determined to be in a temperature reduction trend, one of the second incidence relations is selected as a target incidence relation, and then the heating power matched with the running frequency of the compressor is obtained from the selected target incidence relation.
As an example, table 2 shows an optional correlation comprising a one-to-one correspondence between the compressor operating frequency and the heating power corresponding to each of the temperature increase tendency and the temperature decrease tendency, as shown in the following table,
TABLE 2
In the association shown in Table 2, f1To fnGradually increases in frequency value. Corresponding, P11To P1nThe power value of the compressor is gradually increased, that is, in the first correlation, the operation power of the compressor is positively correlated with the heating power; and, P21To P2nAlso the power value of (a) is gradually reduced, i.e. in a second correlation, the operating power of the compressor is inversely related to the heating power.
Here, if the inlet temperature of the compressor can show a temperature rise trend when the compressor is operated at a frequency of a small value, it means that the amount of heat to be compensated by the heating device is small, and therefore the heating power of the heating device can be set to a small value, whereas if the inlet temperature shows a temperature drop trend, it means that the amount of heat to be compensated by the heating device is large, and therefore the heating power of the heating device is set to a large value. And if the compressor runs at a frequency with a larger value, the inlet liquid temperature can show a temperature rising trend, which indicates that more heat needs to be compensated by the heating device, so that the heating power of the heating device is set to be a larger value, and if the inlet liquid temperature shows a temperature falling trend, the inlet liquid temperature indicates that less heat needs to be compensated by the heating device, so that the heating power of the heating device needs to be set to be a smaller value.
Therefore, in this embodiment, the change of feed liquor temperature before the heating is influenced by the compressor running frequency greatly, and therefore the incidence relation that corresponds is selected according to the temperature change trend of difference in advance, and then the heating power that the compressor running frequency corresponds is determined for the heating power after the adjustment can carry out temperature regulation and control to this refrigerant feed liquor temperature change more, in order to satisfy the air conditioner and prevent the actual demand of condensation.
In some optional embodiments, the number of the first association relations preset by the air conditioner is multiple, and different first association relations correspond to temperature rising trends of different degrees respectively; and the preset second incidence relations are also multiple, and different second incidence relations correspond to the cooling trends of different degrees respectively. Here, the degree of the trend of temperature rise or temperature fall can reflect the influence of the current compression operating frequency on the temperature change of the liquid inlet refrigerant to a certain extent, so that more accurate temperature regulation and control can be realized by selecting corresponding heating power.
Determining a target incidence relation from a preset incidence relation set, wherein the target incidence relation comprises the following steps: determining the temperature rising rate of the temperature rising trend of the liquid inlet refrigerant; acquiring a target incidence relation from a plurality of first incidence relations according to the temperature rise rate; and/or determining the cooling rate of the cooling trend of the liquid inlet refrigerant; and acquiring a target incidence relation from the plurality of second incidence relations according to the temperature rise rate.
For example, the temperature increase rate or decrease rate v may be calculated by the following formula:
in this way, the corresponding first incidence relation can be determined as the target incidence relation according to the calculated temperature rise rate, or the corresponding second incidence relation group can be determined as the target incidence relation according to the calculated temperature fall rate.
Referring to fig. 3, another embodiment of the present disclosure provides a method for preventing condensation of an air conditioner, which includes the following main steps:
s301, refrigerating operation of an air conditioner;
in this embodiment, the air conditioner is operated in a cooling mode by default under a high-temperature working condition in summer.
S302, judging whether T is availableInner coiled pipe-TDew pointLess than or equal to 1 ℃; if yes, executing step S303, otherwise, returning to step S301 or ending the process;
in the present embodiment, TInner coiled pipe-TDew pointThe preset condensation condition is not more than 1 ℃, and the preset temperature difference threshold delta T1 is 1 ℃.
S303, acquiring the current liquid inlet refrigerant temperature T0 and the first liquid inlet refrigerant temperature T1;
in this embodiment, the current liquid refrigerant temperature T0 is a temperature of the refrigerant flowing into the indoor heat exchanger detected at the current time, and the first liquid refrigerant temperature T1 is a temperature of the refrigerant flowing into the indoor heat exchanger detected at a time corresponding to a first time period before the current time.
S304, judging that T0 is larger than T1, if so, executing a step S305, and if not, executing a step S306;
in this embodiment, by comparing the temperature values between T0 and T1, the temperature variation trend of the liquid refrigerant at the current operating frequency of the air conditioner compressor can be determined, if T0 > T1, the liquid refrigerant is in a temperature rising trend, and if T0 < T1, the liquid refrigerant is in a temperature lowering trend.
S305, acquiring heating power corresponding to the operating frequency of the compressor from the first correlation, and executing the step S307;
s306, acquiring heating power corresponding to the operating frequency of the compressor from the second association relation, and executing the step S307;
and S307, controlling to start the heating device to heat the liquid inlet refrigerant according to the heating power.
In this embodiment, the incidence relation that corresponds is selected according to the temperature variation trend of difference, and then determines the heating power that compressor operating frequency corresponds for the heating power after the adjustment can carry out temperature regulation and control to this refrigerant inlet temperature change more, in order to satisfy the actual demand that the condensation was prevented to the air conditioner.
In some optional embodiments, the adjustment of the heating power of the heating device may change the overall current of the air conditioner correspondingly, so as to reduce the safety risk that the current is too large when the air conditioner is operated at high power for safe operation of the air conditioner, and the method for preventing condensation of the air conditioner further includes: when a liquid inlet refrigerant of an indoor unit is heated, the running current of a heating device is obtained; and executing corresponding protection actions according to an overcurrent protection strategy based on the operating current of the heating device.
The corresponding protection action is controlled and executed by utilizing the preset overcurrent protection strategy, so that the safety and the operation stability of the circuit of the air conditioner can be effectively controlled under the condition of starting the heating device.
Optionally, the overcurrent protection strategy includes: when A is1＝A0When the frequency is lower than the current running frequency, the compressor of the air conditioner maintains the current running frequency or reduces the frequency; when A is1＞A0When the temperature is higher than the set temperature, the heating power of the heating device is reduced; when A is1＞A0And P is1＝PMinimum sizeThe compressor of the air conditioner reduces the frequency.
Wherein A is1For the operating current of the heating device, A0Is the current protection threshold of the heating device, P1Is the heating power of the heating device, PMinimum sizeIs the minimum heating power of the heating device.
Fig. 4 is a schematic view of an apparatus for preventing condensation of an air conditioner according to an embodiment of the present disclosure.
As shown in fig. 4, an embodiment of the present disclosure provides a device for preventing condensation of an air conditioner, which can be applied to condensation prevention control of indoor units of various air conditioners, such as a wall-mounted air conditioner, a floor air conditioner, a window air conditioner, and a central air conditioner, to control the air conditioner to perform the method for preventing condensation of an air conditioner shown in the foregoing embodiments.
This a device for air conditioner prevents condensation includes:
a condensation determination module 41 configured to: when the air conditioner operates in a refrigerating mode, whether the indoor unit meets a condensation condition is determined;
a refrigerant heating module 42 configured to: when the indoor unit meets the condensation condition, the heating unit controls the liquid inlet refrigerant of the indoor unit to be heated, wherein the heating power is obtained according to the running frequency of the compressor.
In some optional embodiments, the refrigerant heating module 42 is specifically configured to:
acquiring corresponding heating power from a preset incidence relation according to the running frequency of the compressor; wherein the correlation includes a one-to-one correspondence of operating frequency and heating power of one or more sets of compressors.
In some optional embodiments, the preset association relationship comprises a target association relationship;
the apparatus for preventing condensation of an air conditioner further includes a temperature change determination module configured to: before the refrigerant heating module 42 obtains the corresponding heating power from the preset association relationship according to the operating frequency of the compressor, obtaining a temperature change trend of a liquid inlet refrigerant of the indoor unit, wherein the temperature change trend comprises a temperature rising trend and a temperature reducing trend; determining a target incidence relation from a preset incidence relation set based on the temperature variation trend; the incidence relation set comprises a first incidence relation corresponding to one or more temperature rising trends and a second incidence relation corresponding to one or more temperature lowering trends.
In some optional embodiments, in the first correlation, the operation power of the compressor and the heating power are positively correlated; and/or in the second correlation, the running power of the compressor and the heating power are in negative correlation.
In some optional embodiments, the temperature variation determination module is specifically configured to: determining the temperature rising rate of the temperature rising trend of the liquid inlet refrigerant; acquiring a target incidence relation from a plurality of first incidence relations according to the temperature rise rate; and/or the presence of a gas in the gas,
determining a target incidence relation from a preset incidence relation set, wherein the target incidence relation comprises the following steps: determining the cooling rate of the cooling trend of the liquid inlet refrigerant; and acquiring a target incidence relation from the plurality of second incidence relations according to the temperature rise rate.
In some optional embodiments, the liquid inlet refrigerant of the indoor unit is heated by a heating device;
the device for preventing condensation of the air conditioner further comprises:
a current acquisition module configured to: when a liquid inlet refrigerant of an indoor unit is heated, the running current of a heating device is obtained;
a current protection module configured to: and executing corresponding protection actions according to an overcurrent protection strategy based on the operating current of the heating device.
In some optional embodiments, the overcurrent protection strategy comprises:
when A is1＝A0When the frequency is lower than the current running frequency, the compressor of the air conditioner maintains the current running frequency or reduces the frequency;
when A is1＞A0When the temperature of the water is higher than the set temperature,reducing the heating power of the heating device;
when A is1＞A0And P is1＝PMinimum sizeReducing the frequency of a compressor of the air conditioner;
wherein A is1For the operating current of the heating device, A0Is the current protection threshold of the heating device, P1Is the heating power of the heating device, PMinimum sizeIs the minimum heating power of the heating device.
In various alternative embodiments described above, the condensation conditions include:
Tinner coiled pipe-TDew point≤△T1；
Wherein, TInner coiled pipeIs the temperature of the inner coil, TDew pointThe delta T1 is the preset temperature difference threshold value for the current indoor dew point temperature.
As shown in fig. 5, an embodiment of the present disclosure provides an apparatus for preventing condensation of an air conditioner, which includes a processor (processor)500 and a memory (memory) 501. Optionally, the apparatus may also include a Communication Interface 502 and a bus 503. The processor 500, the communication interface 502, and the memory 501 may communicate with each other via a bus 503. Communication interface 502 may be used for information transfer. The processor 500 may call logic instructions in the memory 501 to perform the method for air conditioner anti-condensation of the above-described embodiment.
In addition, the logic instructions in the memory 501 may be implemented in the form of software functional units and may be stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 501 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 500 executes functional applications and data processing by executing program instructions/modules stored in the memory 501, that is, implements the method for preventing condensation of an air conditioner in the above-described embodiment.
The memory 501 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 501 may include a high-speed random access memory and may also include a nonvolatile memory.
The embodiment of the disclosure provides an air conditioner, which comprises the device for preventing condensation of the air conditioner.
Embodiments of the present disclosure provide a computer-readable storage medium storing computer-executable instructions configured to perform the above-described method for preventing condensation of an air conditioner.
Embodiments of the present disclosure provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising program instructions that, when executed by a computer, cause the computer to perform the above-described method for air conditioner anti-condensation.
The computer-readable storage medium described above may be a transitory computer-readable storage medium or a non-transitory computer-readable storage medium.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify 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. Furthermore, the words used in the specification are words of description only and are not intended to limit the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "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 application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, 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 an …" does not exclude the presence of other like elements in a process, method or apparatus that comprises the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would 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 may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be merely a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart 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 disclosed in the description, and sometimes there is no specific order between the different operations or steps. For example, two sequential operations or steps may in fact be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.
Claims (10)
1. A method for preventing condensation of an air conditioner is characterized by comprising the following steps:
when the air conditioner operates in a refrigerating mode, whether the indoor unit meets a condensation condition is determined;
and when the indoor unit meets the condensation condition, controlling to heat a liquid inlet refrigerant of the indoor unit, wherein the heating power is obtained according to the running frequency of the compressor.
2. The method of claim 1, wherein deriving heating power from an operating frequency of the compressor comprises:
acquiring corresponding heating power from a preset incidence relation according to the running frequency of the compressor; wherein the correlation includes a one-to-one correspondence of operating frequency and heating power of one or more sets of compressors.
3. The method of claim 2, wherein the preset incidence relation comprises a target incidence relation;
before obtaining the corresponding heating power from the preset association relationship according to the operating frequency of the compressor, the method further includes:
acquiring a temperature change trend of a liquid inlet refrigerant of the indoor unit, wherein the temperature change trend comprises a temperature rise trend and a temperature reduction trend;
determining the target incidence relation from a preset incidence relation set based on the temperature change trend; the incidence relation set comprises one or more first incidence relations corresponding to the temperature rising trend and one or more second incidence relations corresponding to the temperature lowering trend.
4. The method according to claim 3, wherein in the first correlation, the operation power of the compressor and the heating power are positively correlated; and/or the presence of a gas in the gas,
in the second correlation, the operating power of the compressor and the heating power are inversely related.
5. The method of claim 3,
determining the target incidence relation from a preset incidence relation set, wherein the target incidence relation comprises the following steps: determining the temperature rising rate of the temperature rising trend of the liquid inlet refrigerant; acquiring the target incidence relation from the plurality of first incidence relations according to the temperature rise rate; and/or the presence of a gas in the gas,
determining the target incidence relation from a preset incidence relation set, wherein the target incidence relation comprises the following steps: determining the cooling rate of the cooling trend of the liquid inlet refrigerant; and acquiring the target incidence relation from the plurality of second incidence relations according to the temperature rise rate.
6. The method as claimed in claim 1, wherein the liquid refrigerant inlet of the indoor unit is heated by a heating device;
the method further comprises the following steps:
when a liquid inlet refrigerant of the indoor unit is heated, the running current of a heating device is obtained;
and executing corresponding protection actions according to an overcurrent protection strategy based on the operating current of the heating device.
7. The method of claim 6, wherein the over-current protection strategy comprises:
when A is1＝A0When the frequency of the air conditioner is reduced, the compressor of the air conditioner maintains the current running frequency or reduces the frequency;
when A is1＞A0When the temperature is higher than the set temperature, reducing the heating power of the heating device;
when A is1＞A0And P is1＝PMinimum sizeThe compressor of the air conditioner reduces the frequency;
wherein A is1For the operating current of the heating device, A0Is a current protection threshold, P, of the heating device1Is the heating power of the heating device, PMinimum sizeIs the minimum heating power of the heating device.
8. The method according to any one of claims 1 to 7, wherein the condensation conditions comprise:
Tinner coiled pipe-TDew point≤△T1；
Wherein, TInner coiled pipeIs the temperature of the inner coil, TDew pointThe delta T1 is the preset temperature difference threshold value for the current indoor dew point temperature.
9. An apparatus for preventing condensation for an air conditioner, the apparatus comprising a processor and a memory storing program instructions, the processor being configured to perform the above-described method for preventing condensation for an air conditioner when executing the program instructions.
10. An air conditioner characterized by comprising the device for preventing condensation of an air conditioner according to claim 9.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114216215A (en) * | 2021-11-19 | 2022-03-22 | 珠海格力电器股份有限公司 | Anti-freezing control method and device for water system and related equipment |
| CN114963491A (en) * | 2022-04-12 | 2022-08-30 | 青岛海尔空调器有限总公司 | Method and device for preventing condensation of air conditioner, air conditioner and storage medium |
| WO2022198978A1 (en) * | 2021-03-22 | 2022-09-29 | 青岛海尔空调器有限总公司 | Method and device for anti-condensation control of air conditioner, and air conditioner |
-
2020
- 2020-09-10 CN CN202010948651.9A patent/CN112146260A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022198978A1 (en) * | 2021-03-22 | 2022-09-29 | 青岛海尔空调器有限总公司 | Method and device for anti-condensation control of air conditioner, and air conditioner |
| CN114216215A (en) * | 2021-11-19 | 2022-03-22 | 珠海格力电器股份有限公司 | Anti-freezing control method and device for water system and related equipment |
| CN114963491A (en) * | 2022-04-12 | 2022-08-30 | 青岛海尔空调器有限总公司 | Method and device for preventing condensation of air conditioner, air conditioner and storage medium |
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