CN107560079B - Control method and device for preventing frost, and air conditioner - Google Patents
Control method and device for preventing frost, and air conditioner Download PDFInfo
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Abstract
本发明公开了一种用于防结霜的控制方法，属于空调技术领域。该方法包括：在制冷模式下，采集两条或两条以上室内盘管支路温度；根据两条或两条以上室内盘管支路温度调节压缩机的工作频率。在本发明中，采集多个室内盘管支路的温度，综合多个室内盘管支路的温度确定压缩机的工作频率，提高了对压缩机的工作频率调节的精确度，在室内换热器出现分流不均时，能够有效防止结霜现象产生。本发明还公开了一种用于防结霜的控制装置及空调。
The invention discloses a control method for preventing frost, belonging to the technical field of air conditioners. The method includes: in the cooling mode, collecting the temperature of two or more indoor coil branch circuits; and adjusting the operating frequency of the compressor according to the temperature of the two or more indoor coil branch circuits. In the present invention, the temperature of multiple indoor coil branches is collected, and the temperature of the multiple indoor coil branches is combined to determine the operating frequency of the compressor, thereby improving the accuracy of adjusting the operating frequency of the compressor, and exchanging heat indoors. When the shunt is uneven, it can effectively prevent the occurrence of frosting. The invention also discloses a control device and an air conditioner for preventing frost.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a control method and device for preventing frosting and an air conditioner.
Background
The prior art discloses a control method for preventing an indoor heat exchanger from frosting during the refrigerating operation of a variable frequency air conditioner, which comprises the following steps: in the refrigerating operation, detecting the coil temperature Tm of the indoor heat exchanger in real time as a judgment basis; in the normal state, the control process is that Tm is gradually reduced after the variable frequency compressor is started, and when Tm is reduced to 8-9 ℃, the variable frequency compressor slowly increases the frequency at the speed of 10-15 s/Hz; at the moment, Tm continuously decreases, when Tm decreases to 3-5 ℃, the current running frequency of the variable frequency compressor is defined as the highest frequency, the stable running of the highest frequency is maintained, and the Tm is stabilized within the optimal temperature range of 3-5 ℃ for a long time; when the heat absorption capacity is slightly insufficient due to the change of the heat exchange condition of the indoor heat exchanger, Tm continuously decreases after reaching the optimal temperature range between 3 and 5 ℃, when Tm decreases to between 1 and 2 ℃, the variable frequency compressor slowly reduces the frequency at the speed of 5 to 10s/Hz until Tm rises to between 5 and 6 ℃ again, the frequency reduction is stopped, and the current frequency is kept to stably operate; when the heat absorption capacity is seriously insufficient due to the abnormal heat exchange condition of the indoor heat exchanger, Tm is rapidly reduced, and when Tm is reduced to-1 to-2 ℃, the variable frequency compressor is stopped; and after the shutdown, when the Tm is increased to be within the range of 7-9 ℃, restoring the slow frequency increase under the normal state, and if the Tm is decreased to be between-1 and-2 ℃ after the operation of the variable frequency compressor is restored, stopping the shutdown and reporting the fault. Although the method can solve the problems that when the temperature of the coil pipe of the indoor heat exchanger is too low, the coil pipe is directly stopped or the compressor is greatly reduced in frequency, so that the room temperature is greatly fluctuated and people feel uncomfortable, the method is limited by the installation position of the temperature detection device, and when the indoor heat exchanger has uneven flow distribution, the frosting phenomenon cannot be effectively prevented.
Disclosure of Invention
The embodiment of the invention provides a control method and device for preventing frosting and an air conditioner, and aims to solve the problem that the frosting phenomenon cannot be effectively prevented when uneven flow distribution occurs in an indoor heat exchanger in the prior art. 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. Its sole purpose is to present some concepts in a simplified form as a prelude to the more detailed description that is presented later.
According to a first aspect of embodiments of the present invention, there is provided a method for preventing frosting, comprising: in a refrigeration mode, collecting the temperatures of two or more indoor coil pipe branches; and adjusting the working frequency of the compressor according to the temperatures of two or more indoor coil branch circuits.
Optionally, the determining and adjusting the operating frequency of the compressor according to the temperatures of the two or more indoor coil branches includes: determining the minimum temperature value of the temperatures of two or more indoor coil branch circuits as an adjusting temperature; and adjusting the working frequency of the compressor according to the adjusting temperature.
Optionally, one of the indoor coil branches is a main pipe of the liquid inlet pipe group or the coil branch adjacent to the valve is the liquid inlet pipe group.
Optionally, the determining and adjusting the operating frequency of the compressor according to the temperatures of the two or more indoor coil branches includes: calculating the average temperature value of the temperatures of two or more indoor coil branch circuits, and determining the average temperature value as an adjusting temperature; and adjusting the working frequency of the compressor according to the adjusting temperature.
Optionally, the determining and adjusting the operating frequency of the compressor according to the temperatures of the two or more indoor coil branches includes: calculating the average temperature value of the temperatures of two or more indoor coil branch circuits; calculating the difference value of the average temperature value minus the minimum temperature values of the temperatures of two or more indoor coil branch circuits; when the difference is greater than or equal to a first set temperature, determining the minimum temperature value of the temperatures of two or more indoor coil branch circuits as an adjusting temperature; when the difference value is smaller than a first set temperature, determining the average temperature value as an adjusting temperature; and adjusting the working frequency of the compressor according to the adjusting temperature.
Optionally, the adjusting the operating frequency of the compressor according to the adjustment temperature includes: calculating a difference value delta t of the second set temperature minus the regulating temperature; and determining an adjusting scheme of the working frequency of the compressor according to the difference value delta t.
Optionally, determining an adjustment scheme of the operating frequency of the compressor according to the difference Δ t includes: calculating a difference value delta t of the second set temperature minus the regulating temperature; when the difference value delta t is larger than or equal to a first set temperature difference value, adjusting the working frequency of the compressor to periodically reduce according to a first frequency value; when the difference value delta t is larger than or equal to a second set temperature difference value and smaller than the first set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a second frequency value; when the difference value delta t is larger than or equal to a third set temperature difference value and smaller than the second set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a third frequency value; and when the difference value delta t is smaller than the third set temperature difference value, the compressor keeps operating at the current working frequency for a first set time.
Optionally, the operating frequency of the compressor is greater than or equal to the set frequency F.
According to a second aspect of embodiments of the present invention, there is provided a device for preventing frosting, comprising: the acquisition unit is used for acquiring the temperatures of two or more indoor coil pipe branches in a refrigeration mode; and the adjusting unit is used for adjusting the working frequency of the compressor according to the temperatures of the two or more indoor coil pipe branches.
Optionally, the adjusting unit is further configured to adjust an operating frequency of the compressor according to a minimum temperature value of temperatures of two or more indoor coil branches.
Optionally, the first calculating unit is configured to calculate an average temperature value of temperatures of two or more indoor coil branches, and determine the average temperature value as an adjustment temperature; the adjusting unit is further used for calculating the working frequency of the temperature adjusting compressor according to the first calculating unit.
Optionally, the second calculating unit is configured to calculate an average temperature value of the temperatures of the two or more indoor coil branch circuits, and calculate a difference between the average temperature value and a minimum temperature value of the temperatures of the two or more indoor coil branch circuits subtracted by the average temperature value; the adjusting unit is further used for adjusting the working frequency of the compressor according to the minimum temperature value of the temperatures of the two or more indoor coil pipe branches when the difference value is greater than or equal to a first set temperature; and when the determined difference value is smaller than the first set temperature, adjusting the working frequency of the compressor according to the average temperature value.
Optionally, the method further comprises: a third calculating unit for calculating a difference Δ t of the second set temperature minus the adjustment temperature; and the adjusting unit is also used for determining an adjusting scheme of the working frequency of the compressor according to the difference value delta t.
Optionally, the adjusting unit is further configured to adjust the operating frequency of the compressor to be periodically decreased according to a first frequency value when the difference Δ t is greater than or equal to a first set temperature difference value; when the difference value delta t is larger than or equal to a second set temperature difference value and smaller than the first set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a second frequency value; when the difference value delta t is larger than or equal to a third set temperature difference value and smaller than the second set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a third frequency value; optionally, when the difference Δ t is smaller than the third set temperature difference value, the compressor keeps operating at the current operating frequency for a first set time.
Optionally, the operating frequency of the compressor is greater than or equal to the set frequency F.
According to a third aspect of embodiments of the present invention, there is provided an air conditioner comprising an indoor coil and a compressor, and further comprising any of the above-described devices.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
gather the temperature of a plurality of indoor coil pipe branches, synthesize the operating frequency of the temperature determination compressor of a plurality of indoor coil pipe branches, improved the accuracy of operating frequency regulation to the compressor, when indoor heat exchanger appearance reposition of redundant personnel is uneven, can effectively prevent frosting phenomenon and produce.
In the present embodiment, it is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and together with the description, serve to explain the principles of the invention.
FIG. 1 is a schematic flow diagram illustrating a method for preventing frosting according to an exemplary embodiment;
FIG. 2 is a schematic flow diagram illustrating a method for preventing frosting according to an exemplary embodiment;
FIG. 3 is a schematic flow diagram illustrating a method for preventing frosting according to an exemplary embodiment;
FIG. 4 is a schematic flow diagram illustrating a method for preventing frosting according to an exemplary embodiment;
FIG. 5 is a block diagram illustrating the structure of an apparatus for preventing frosting according to an exemplary embodiment;
FIG. 6 is a block diagram illustrating the structure of an apparatus for preventing frosting according to an exemplary embodiment;
fig. 7 is a block diagram illustrating a structure of an apparatus for preventing frosting according to an exemplary embodiment.
Detailed Description
The following description and the drawings sufficiently illustrate specific embodiments of the invention to enable those skilled in the art to practice them. 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. The scope of embodiments of the invention encompasses the full ambit of the claims, as well as all available equivalents of the claims. Embodiments may be referred to herein, individually or collectively, by the term "invention" merely for convenience and without intending to voluntarily limit the scope of this application to any single invention or inventive concept if more than one is in fact disclosed. Herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed. For the structures, products and the like disclosed by the embodiments, the description is relatively simple because the structures, the products and the like correspond to the parts disclosed by the embodiments, and the relevant parts can be just described by referring to the method part.
The invention relates to an indoor unit of an air conditioner applied indoors, which is provided with an indoor heat exchanger formed by serially connecting and combining a plurality of coil pipe branches, wherein the temperature of the coil pipe branches can be gradually reduced after a variable frequency compressor is started in a refrigeration mode, when the heat absorption capacity is insufficient due to abnormal heat exchange conditions of the indoor heat exchanger, the temperature of the coil pipe branches can be reduced, and the frosting phenomenon can be generated under the condition that the temperature of the coil pipe branches is too low. When some coil branches are abnormal, the local temperature of the indoor heat exchanger is too low. The control method provided by the invention mainly aims at the problem that the partial coil pipe branch of the air conditioner in the refrigeration mode is abnormal, and the traditional anti-frosting method cannot effectively prevent the indoor heat exchanger from frosting.
The working mode of the air conditioner is set by a user through an air conditioner remote controller, a control panel on an air conditioner indoor unit or a mobile terminal with a remote control function for the air conditioner. Such as: and the refrigeration mode of the air conditioner is controlled by clicking a refrigeration mode button on the remote controller.
FIG. 1 is a flow chart illustrating a control method for frost prevention according to an exemplary embodiment. As shown in fig. 1, includes:
and step S101, collecting temperatures of two or more indoor coil branch circuits in the refrigerating mode.
And S102, adjusting the working frequency of the compressor according to the temperatures of two or more indoor coil pipe branches.
The temperature sensors are arranged on the surfaces of two or more indoor coil branch circuits of the air conditioner and used for detecting the temperatures of different indoor coil branch circuits so as to improve the accuracy of adjusting the working frequency of the compressor.
In some embodiments, a temperature sensor is arranged on the main pipe of the liquid inlet pipe group of the indoor heat exchanger and used for detecting the temperature of the main pipe of the liquid inlet pipe group of the indoor heat exchanger. A valve is arranged between the indoor heat exchanger and the compressor to control the flow of the refrigerant entering the indoor heat exchanger. The coil pipe branch adjacent to the valve is a liquid inlet pipe group, the refrigerant flows to each indoor coil pipe branch from the liquid inlet pipe group, and the refrigerant absorbs heat in the flowing process. Thus, the indoor coil leg that first contacts the refrigerant is cooler. In some embodiments, one of the plurality of temperature sensors is disposed on a connection pipeline between the main pipe of the liquid inlet pipe set and the valve.
Wherein, the collected coil branch is selected to be adjacent or not adjacent. Preferably, the collected coil branches are not adjacent. Under the nonadjacent condition of coil pipe branch road of gathering, can guarantee that the temperature of gathering covers the condition of indoor heat exchanger totality, avoid appearing under the unusual condition in partial coil pipe branch road, the adjacent coil pipe branch road temperature of gathering influences each other, causes the operating frequency to the compressor and adjusts inaccurately to it is low excessively to be so that indoor heat exchanger local temperature, has potential risk of frosting.
In this embodiment, gather the temperature of a plurality of indoor coil pipe branches, synthesize the operating frequency of the temperature determination compressor of a plurality of indoor coil pipe branches, improved the accuracy of operating frequency regulation to the compressor, when indoor heat exchanger appearance reposition of redundant personnel is uneven, can effectively prevent frosting phenomenon and produce.
FIG. 2 is a flow chart illustrating a control method for frost prevention according to an exemplary embodiment. As shown in fig. 2, includes:
step S201, under the refrigeration mode, collecting the temperatures of two or more indoor coil pipe branches.
Step S202, determining the minimum temperature value of the temperatures of two or more indoor coil branch circuits as the adjusting temperature.
And S203, adjusting the working frequency of the compressor according to the adjusting temperature.
Under the unusual condition appears in some coil pipe branch roads, can cause the pipeline temperature uneven, adjust the operating frequency of compressor according to the minimum value in many coil pipe branch road temperatures of gathering, can prevent that indoor heat exchanger part from frosting.
FIG. 3 is a flow chart illustrating a control method for frost prevention according to an exemplary embodiment. As shown in fig. 3, includes:
step S301, under the refrigeration mode, collecting temperatures of two or more indoor coil pipe branches.
Step S302, calculating an average temperature value of the temperatures of two or more indoor coil branch circuits, and determining the average temperature value as an adjusting temperature.
And step S303, adjusting the working frequency of the compressor according to the adjusting temperature.
According to the difference of coil pipe branch road and feed liquor nest of tubes distance, there is the deviation in coil pipe branch road temperature, adjusts the operating frequency of compressor according to the average temperature value of many coil pipe branch road temperatures of gathering, can improve the accuracy that operating frequency carried out the regulation, effectively prevents to hang down because of local coil pipe branch road temperature is too high or low to the accuracy of operating frequency regulation, has the risk of frosting.
FIG. 4 is a flowchart illustrating a control method for frost prevention according to an exemplary embodiment. As shown in fig. 4, includes:
step S401, under the refrigeration mode, collecting temperatures of two or more indoor coil pipe branches.
Step S402, calculating the average temperature value of the temperatures of two or more indoor coil branch circuits.
And step S403, calculating the difference value of the average temperature value minus the minimum temperature values of the temperatures of two or more indoor coil branch circuits.
When the difference is greater than or equal to the first set temperature, executing step S404, determining the minimum temperature value of the temperatures of the two or more indoor coil branches as an adjustment temperature, and executing step S406, and adjusting the operating frequency of the compressor according to the adjustment temperature.
And when the difference value is smaller than the first set temperature, executing step S405, determining the average temperature value as the adjusting temperature, and executing step S406, and adjusting the working frequency of the compressor according to the adjusting temperature.
Optionally, the first set temperature is in a range of 1 ℃ to 5 ℃. Preferably, the first set temperature is 1 ℃, 3 ℃ or 5 ℃.
According to the difference of coil pipe branch road and feed liquor nest of tubes distance, there is the deviation coil pipe branch road temperature, adjust the operating frequency that can avoid causing because of coil pipe branch road position difference to the operating frequency of compressor according to the average temperature value of many coil pipe branch road temperatures, nevertheless, compromise the average temperature value of two or more than two indoor coil pipe branch road temperatures to and the average temperature value of two or more than two indoor coil pipe branch road temperatures, can effectively avoid appearing the hidden danger that frosts that causes unusually because of partial coil pipe branch road. For example: when the average temperature value of the temperatures of the two or more indoor coil branch circuits is calculated to be 24 ℃, the first set temperature is 3 ℃, and the minimum temperature value of the temperatures of the two or more indoor coil branch circuits is 20 ℃, the working frequency of the compressor is adjusted according to the minimum temperature value of 24 ℃; when the average temperature value of the temperatures of the two or more indoor coil branch circuits is calculated to be 24 ℃, the first set temperature is 3 ℃, and the minimum temperature value of the temperatures of the two or more indoor coil branch circuits is 22 ℃, the working frequency of the compressor is adjusted according to the average temperature value of 24 ℃.
In the foregoing embodiments, various embodiments of adjusting the operating frequency of the compressor according to the temperatures of the two or more indoor coil branches in step S102 are mainly listed, but not limited thereto. The collected temperatures of the two or more indoor coil branch circuits can be comprehensively used for determining the working frequency of the compressor according to other calculation formulas, and the method is not exhaustive, for example, the functional relation between the temperatures of the two or more indoor coil branch circuits and the working frequency of the compressor is determined according to multiple tests, so that the accuracy of adjusting the working frequency of the compressor is improved.
In any of the preceding embodiments, adjusting the operating frequency of the compressor based on the adjusted temperature comprises: calculating a difference value delta t of the second set temperature minus the regulating temperature; and determining an adjusting scheme of the working frequency of the compressor according to the difference value delta t.
Wherein the second set temperature range is 25-30 ℃. The value of the second set temperature is related to the ambient temperature and the heat exchange area of the indoor heat exchanger of the air conditioner. Such as: the second set temperature is greater as the ambient temperature is higher.
Specifically, when the difference value Δ t is greater than or equal to a first set temperature difference value, the operating frequency of the compressor is adjusted to be periodically reduced according to a first frequency value; when the difference value delta t is larger than or equal to and smaller than the first set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a second frequency value; when the difference value delta t is larger than or equal to and smaller than the second set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a third frequency value; and when the difference value delta t is smaller than the third set temperature difference value, the compressor keeps operating at the current working frequency for a first set time. The first set temperature difference value is larger than the second set temperature difference value, and the second set temperature difference value is larger than the third set temperature difference value. The first frequency value is greater than the second frequency value, and the second frequency value is greater than the third frequency value. Namely, when the difference value delta t is larger, the working frequency of the compressor is reduced more quickly, the temperature of each coil pipe branch is adjusted quickly, the temperature of each coil pipe branch is increased, and frosting is prevented.
Preferably, the first set temperature difference value is 5 ℃, the second set temperature difference value is 3 ℃ and the third set temperature difference value is 1 ℃. The first frequency value is 60Hz, the second frequency value is 12Hz, and the third frequency value is 6 Hz. The unit of the cycle is minutes. I.e. periodically decreasing by a first frequency value such that the frequency of the compressor in each minute is 60Hz less than the frequency of the compressor in the previous minute.
In some embodiments, the air conditioning system is pre-programmed with an operating frequency range of the compressor at which the compressor operates when the operating frequency of the compressor is determined to be less than a lower limit. The sudden stop of the air conditioner compressor is prevented, the running pressure of the air conditioner for closing and opening the compressor in a short time is reduced, and the energy consumption is saved.
In some embodiments, when the difference Δ t is smaller than the third set temperature difference value, the method further includes: and the outdoor fan stops running.
The invention discloses a control device for preventing frosting, which is used for executing the control method for preventing frosting in the previous embodiment.
Fig. 5 is a block diagram illustrating a control apparatus for preventing frosting according to an exemplary embodiment. As shown in fig. 5, includes: an acquisition unit 501 and an adjustment unit 502.
And the acquisition unit 501 is used for acquiring the temperatures of two or more indoor coil branch circuits in the refrigeration mode.
And the adjusting unit 502 is used for adjusting the working frequency of the compressor according to the temperatures of the two or more indoor coil branches.
In this embodiment, the temperature of a plurality of indoor coil pipe branches is gathered to the collection unit, and the operating frequency of the temperature regulation compressor of a plurality of indoor coil pipe branches is synthesized to the regulating unit, has improved the accuracy of operating frequency regulation to the compressor, when indoor heat exchanger appearance reposition of redundant personnel is uneven, can effectively prevent frosting phenomenon and produce.
In some embodiments, the adjusting unit 502 is configured to adjust the operating frequency of the compressor according to a minimum temperature value of the temperatures of the two or more indoor coil branches.
In some embodiments, as shown in fig. 6, a first calculating unit 601 is further included for calculating an average temperature value of two or more indoor coil branch temperatures, and determining the average temperature value as the regulated temperature.
And an adjusting unit 502 for adjusting the operating frequency of the temperature-adjusting compressor according to the adjustment temperature calculated by the first calculating unit 601.
In some embodiments, as shown in fig. 6, a second calculating unit 701 is further included, configured to calculate an average temperature value of two or more indoor coil branch temperatures, and calculate a difference value between the average temperature value and a minimum temperature value of the two or more indoor coil branch temperatures.
The adjusting unit 502 is configured to adjust the operating frequency of the compressor according to the minimum temperature values of the temperatures of the two or more indoor coil pipe branches when the difference value obtained by the second calculating unit 701 is greater than or equal to the first set temperature; and when the determined difference value is smaller than the first set temperature, adjusting the working frequency of the compressor according to the average temperature value.
In any of the foregoing embodiments, further comprising: a third calculating unit (not shown in the figure) for calculating a difference Δ t of the second set temperature minus the regulated temperature, and a regulating unit 502 for determining an adjustment scheme of the operating frequency of the compressor according to the difference Δ t calculated by the third calculating unit. Specifically, the operating frequency of the air conditioner compressor is adjusted according to the adjusting scheme implemented by the method.
The invention also provides an air conditioner comprising the control device for preventing frosting in any embodiment.
It is to be understood that the present invention is not limited to the procedures and structures described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the invention is limited only by the appended claims.
Claims (3)
1. A control method for frost prevention, comprising:
in a refrigeration mode, collecting the temperatures of two or more indoor coil pipe branches;
adjusting the working frequency of the compressor according to the temperatures of two or more indoor coil pipe branches;
the determining and adjusting the operating frequency of the compressor according to the temperatures of two or more indoor coil branch circuits comprises:
calculating the average temperature value of the temperatures of two or more indoor coil branch circuits;
calculating the difference value of the average temperature value minus the minimum temperature values of the temperatures of two or more indoor coil branch circuits;
when the difference is greater than or equal to a first set temperature, determining the minimum temperature value of the temperatures of two or more indoor coil branch circuits as an adjusting temperature;
when the difference value is smaller than a first set temperature, determining the average temperature value as an adjusting temperature;
adjusting the working frequency of the compressor according to the adjusting temperature;
the adjusting the operating frequency of the compressor according to the adjustment temperature includes:
calculating a difference value delta t of the second set temperature minus the regulating temperature; wherein the second set temperature is positively correlated with the ambient temperature;
determining an adjustment scheme of the working frequency of the compressor according to the difference value delta t;
when the difference value delta t is larger than or equal to a first set temperature difference value, adjusting the working frequency of the compressor to periodically reduce according to a first frequency value; when the difference value delta t is larger than or equal to a second set temperature difference value and smaller than the first set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a second frequency value; when the difference value delta t is larger than or equal to and smaller than the second set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a third frequency value; when the difference value delta t is smaller than a third set temperature difference value, the compressor keeps operating at the current working frequency for a first set time;
wherein the first set temperature difference value is greater than the second set temperature difference value; the second set temperature difference value is larger than the third set temperature difference value; the first frequency value is greater than the second frequency value; the second frequency value is greater than the third frequency value.
2. A control device for frost prevention, comprising:
the acquisition unit is used for acquiring the temperatures of two or more indoor coil pipe branches in a refrigeration mode;
the adjusting unit is used for adjusting the working frequency of the compressor according to the temperatures of the two or more indoor coil pipe branches;
further comprising: the second calculation unit is used for calculating the average temperature value of the temperatures of the two or more indoor coil branch circuits and calculating the difference value of the average temperature value minus the minimum temperature value of the temperatures of the two or more indoor coil branch circuits;
the adjusting unit is further used for adjusting the working frequency of the compressor according to the minimum temperature value of the temperatures of the two or more indoor coil pipe branches when the difference value is greater than or equal to a first set temperature; when the determined difference value is smaller than a first set temperature, adjusting the working frequency of the compressor according to the average temperature value;
a third calculating unit for calculating a difference Δ t of the second set temperature minus the adjustment temperature;
the adjusting unit is further configured to determine an adjustment scheme of the operating frequency of the compressor according to the difference Δ t, and includes: when the difference value delta t is larger than or equal to a first set temperature difference value, adjusting the working frequency of the compressor to periodically reduce according to a first frequency value; when the difference value delta t is larger than or equal to a second set temperature difference value and smaller than the first set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a second frequency value; when the difference value delta t is larger than or equal to and smaller than the second set temperature difference value, adjusting the working frequency of the compressor to be periodically reduced according to a third frequency value; when the difference value delta t is smaller than a third set temperature difference value, the compressor keeps operating at the current working frequency for a first set time;
wherein the first set temperature difference value is greater than the second set temperature difference value; the second set temperature difference value is larger than the third set temperature difference value; the first frequency value is greater than the second frequency value; the second frequency value is greater than the third frequency value.
3. An air conditioner comprising an indoor coil and a compressor, further comprising the apparatus of claim 2.
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| CN110057053A (en) * | 2019-04-16 | 2019-07-26 | 青岛海尔空调器有限总公司 | The temperature controlled method, apparatus of air conditioning evaporator coil and computer storage medium |
| CN114061186B (en) * | 2021-11-26 | 2022-11-11 | 珠海格力电器股份有限公司 | Operating frequency control method and device of air source heat pump water heater |
| CN114543299A (en) * | 2022-01-20 | 2022-05-27 | 青岛海尔空调器有限总公司 | Control method for air conditioner and air conditioner |
| CN114811909B (en) * | 2022-03-14 | 2023-12-15 | 青岛海尔空调器有限总公司 | Control method, device, equipment and medium for fan of indoor heat exchanger of air conditioner |
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| JP3611257B2 (en) * | 1995-03-27 | 2005-01-19 | 三菱重工業株式会社 | Heat pump air conditioner |
| KR100550218B1 (en) * | 2004-02-18 | 2006-02-08 | 위니아만도 주식회사 | Defroster for Air Conditioning |
| CN101504181B (en) * | 2009-03-04 | 2011-04-20 | 海信（山东）空调有限公司 | Defrosting method for air conditioner |
| WO2012046947A1 (en) * | 2010-10-06 | 2012-04-12 | Chungju National University Industrial Cooperation Foundation | Heat pump outdoor unit having two rows of coils of dual pipe structure and alternating type heat pump |
| CN104180571B (en) * | 2014-08-25 | 2016-11-09 | 广东美的集团芜湖制冷设备有限公司 | The defrosting control method of air-conditioner, the defrosting of air-conditioner control device and air-conditioner |
| CN105157172B (en) * | 2015-08-31 | 2018-03-30 | Tcl空调器(中山)有限公司 | control method and device of air conditioner |
| CN106288162B (en) * | 2016-08-08 | 2019-12-13 | 广东美的暖通设备有限公司 | Defrosting entry judgment method and system and air conditioner |
| CN106839325B (en) * | 2017-02-28 | 2019-07-23 | 广东美的制冷设备有限公司 | Air-conditioner control method, device and air conditioner |
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