CN112682989B - Compressor rotating speed control method, device and equipment and refrigerator - Google Patents
Compressor rotating speed control method, device and equipment and refrigerator Download PDFInfo
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Abstract
The invention relates to a compressor rotating speed control method, a device, equipment and a refrigerator, belonging to the technical field of refrigerators, wherein the method comprises the steps of obtaining the current working condition of the refrigerator, and matching the current working condition with the running characteristic of the refrigerator so as to determine the target rotating speed corresponding to the current working condition; the total refrigerating capacity required by the refrigerator to reach the set temperature is calculated, the time length for reaching the preset temperature when the refrigerator runs at the target rotating speed is calculated according to the total refrigerating capacity, and therefore the rotating speed of the compressor is adjusted according to the time length, the refrigerating efficiency of the refrigerator can be met, and meanwhile the refrigerating performance index of the refrigerator can be maintained to be optimal. The technical problems that the running performance of the refrigerator at different gears is difficult to guarantee and energy waste is generated to a certain degree by a rotating speed control method of fixing a set temperature corresponding to a fixed compressor rotating speed gear in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of refrigerators, and particularly relates to a method, a device and equipment for controlling the rotating speed of a compressor and a refrigerator.
Background
The improvement of living standard makes the refrigerator widely used in the family of the residents. In order to improve the energy saving performance of the refrigerator, different refrigerator operation control strategies can be formulated. Particularly for the frequency conversion refrigerator, the advantages and disadvantages of the control strategy of the frequency conversion refrigerator are of great importance for fresh keeping and energy saving of the refrigerator.
In the prior art, the control of the operation condition of the refrigerator is usually achieved by controlling the rotating speed of a compressor in the variable frequency refrigerator. The method for controlling the rotating speed of the compressor generally includes dividing the compressor into different operating gears, selecting a corresponding gear according to a set temperature during operation of the refrigerator, and generally, each set temperature corresponds to a high gear and a low gear of the rotating speed of the compressor, which are fixed according to the temperature value. The method for selecting the gear according to the working condition can control the refrigerating assembly of the refrigerator to generate refrigerating capacity matched with actual load, and ensures that the temperature of the compartment fluctuates in a certain range.
However, the operation efficiency of the same refrigerator is different at different gears under the same working condition, and the rotation speed control method of the prior art, in which the fixed set temperature corresponds to the fixed compressor rotation speed gear, makes the operation performance of the refrigerator at different gears difficult to guarantee and generates a certain degree of energy waste.
Disclosure of Invention
The invention provides a compressor rotating speed control method, a compressor rotating speed control device, equipment and a refrigerator, and aims to solve the technical problems that in the prior art, the running performance of the refrigerator at different gears is difficult to guarantee and energy waste is generated to a certain extent due to a rotating speed control method of fixing a set temperature corresponding to a fixed compressor rotating speed gear.
The technical scheme provided by the invention is as follows:
in one aspect, a method for controlling a rotational speed of a compressor is applied to a refrigerator, and the method includes:
acquiring the working condition of the refrigerator, wherein the working condition comprises the following steps: the ambient temperature, the actual temperature of the target compartment and the set temperature of the target compartment;
determining a target rotation speed corresponding to the working condition based on the operating characteristics of the refrigerator;
calculating the total refrigerating capacity required by the target compartment to reach the set temperature;
calculating the time length required by the target compartment to reach the set temperature when a compressor of the refrigerator runs at the target rotating speed according to the total refrigerating capacity;
and adjusting the rotating speed of the compressor according to the time length.
Optionally, the adjusting the rotation speed of the compressor according to the time duration includes:
judging whether the duration is less than or equal to a first duration threshold, and if the duration is less than or equal to the first duration threshold, reducing the rotating speed of the compressor;
if the duration is greater than a first duration threshold, judging whether the duration is less than or equal to a second duration threshold, and if the duration is less than or equal to the second duration threshold, controlling the compressor to operate at the target rotating speed; and if the duration is greater than the second duration threshold, increasing the rotating speed of the compressor.
Optionally, the operation characteristic of the refrigerator is obtained by detecting a target rotation speed of the refrigerator under each working condition through a performance testing device, and recording the working condition and the corresponding target rotation speed to generate the operation characteristic of the refrigerator; the target rotating speed is the rotating speed of the compressor when the performance index of the refrigerator is within a preset performance index threshold range.
Optionally, the calculating the total cooling capacity required by the target compartment to reach the set temperature includes:
and determining the output refrigerating capacity of the compressor, and determining the total refrigerating capacity according to the output refrigerating capacity of the compressor.
Optionally, the calculating, according to the total cooling capacity, a time period required for the target compartment to reach the set temperature when the compressor of the refrigerator operates at the target rotation speed includes:
acquiring the leakage heat load, the storage heat load, the door opening and closing heat load and the heating heat load of the refrigerator, and calculating the total heat load of the refrigerator within the time length required by the target compartment to reach the set temperature;
and calculating the time required for the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
In another aspect, a rotational speed control apparatus for a compressor, applied to a refrigerator, includes: the device comprises an acquisition module, a determination module, a first calculation module, a second calculation module and an adjustment module;
the acquisition module is used for acquiring the working condition of the refrigerator, and the working condition comprises the following steps: the ambient temperature, the actual temperature of the target compartment and the set temperature of the target compartment;
the determining module is used for determining a target rotating speed corresponding to the working condition based on the running characteristic of the refrigerator;
the first calculating module is used for calculating the total refrigerating capacity required by the target compartment to reach the set temperature;
the second calculating module is used for calculating the time length required by the target compartment to reach the set temperature when the compressor of the refrigerator runs at the target rotating speed according to the total refrigerating capacity;
and the adjusting module is used for adjusting the rotating speed of the compressor according to the time length.
Optionally, the adjusting module is configured to determine whether the duration is less than or equal to a first duration threshold, and if the duration is less than or equal to the first duration threshold, reduce the rotation speed of the compressor; if the duration is greater than a first duration threshold, judging whether the duration is less than or equal to a second duration threshold, and if the duration is less than or equal to the second duration threshold, controlling the compressor to operate at the target rotating speed; and if the duration is greater than the second duration threshold, increasing the rotating speed of the compressor.
Optionally, the second calculating module is configured to obtain a heat leakage load, a storage heat load, a door opening/closing heat load, and a heating heat load of the refrigerator, and calculate a total heat load of the refrigerator within a time period required for the target compartment to reach the set temperature; and calculating the time required for the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
In still another aspect, a compressor rotation speed control apparatus includes: a processor, and a memory coupled to the processor;
the memory is used for storing a computer program at least for executing the compressor rotating speed control method;
the processor is used for calling and executing the computer program in the memory.
In still another aspect, a refrigerator includes: a compressor and the compressor speed control device; the compressor is connected with the compressor rotating speed control device.
The invention has the beneficial effects that:
according to the compressor rotating speed control method, the compressor rotating speed control device, the compressor rotating speed control equipment and the refrigerator, the current working condition of the refrigerator is obtained, and the current working condition is matched with the running characteristic of the refrigerator, so that the target rotating speed corresponding to the current working condition is determined; the total refrigerating capacity of the refrigerator, which is required to reach the set temperature, is calculated, the time length for reaching the preset temperature when the refrigerator runs at the target rotating speed is calculated according to the total refrigerating capacity, so that the rotating speed of the compressor is adjusted according to the time length, the refrigerating efficiency of the refrigerator can be met, and meanwhile, the refrigerating performance index of the refrigerator can be maintained to be optimal. The technical problems that the running performance of the refrigerator at different gears is difficult to guarantee and energy waste is generated to a certain degree by a rotating speed control method of fixing a set temperature corresponding to a fixed compressor rotating speed gear in the prior art are solved.
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In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a relationship between a set temperature and a compressor gear of a variable frequency refrigerator according to an embodiment of the present invention;
FIG. 2 is a schematic diagram illustrating a trend of a refrigeration performance index of a refrigerator according to an embodiment of the present invention;
FIG. 3 is a flow chart illustrating a method for controlling a rotational speed of a compressor according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a rotational speed control apparatus for a compressor according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a rotational speed control apparatus for a compressor according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Fig. 1 is a schematic diagram illustrating a corresponding relationship between a set temperature and a compressor gear of an inverter refrigerator according to the prior art, please refer to fig. 1, in the prior art, some inverter refrigerators generally correspond to a fixed compressor gear at each set temperature stage, for example, the set temperature is 10 ℃ to-15 ℃ at a fixed interval of 5 ℃, and respectively correspond to the compressor gear F1 to the compressor gear F6, and the lower the set temperature is, the higher the corresponding compressor gear is, and the higher the compressor rotation speed is.
COP (Coefficient Of Performance), also sometimes referred to as CP or COP, is used to indicate the ratio Of useful heating or cooling provided compared to the desired output. The higher the COP, the higher the efficiency and the lower the operating cost. For a refrigerator, the higher the value of the refrigerator COP, the higher the efficiency of the refrigerator, and the lower the operating cost.
Fig. 2 is a schematic diagram illustrating a trend of a refrigeration performance index of a refrigerator according to an embodiment of the present invention, referring to fig. 2, in some refrigerators, the refrigeration performance index of the refrigerator gradually increases with an increase in a rotation speed of a compressor, and after the refrigeration performance index of the refrigerator gradually decreases with an increase in the rotation speed of the compressor after the refrigeration performance index of the refrigerator gradually increases to a certain degree. Therefore, the rotation speed of the compressor is not completely proportional to the index of the refrigerating performance of the refrigerator. It is worth noting that fig. 2 herein is an exemplary illustration of the trend of the index of refrigeration performance of some refrigerators according to the rotation speed.
Based on the above, the embodiment of the invention provides a method for controlling the rotating speed of a compressor.
Fig. 3 is a schematic flow chart of a method for controlling a rotational speed of a compressor according to an embodiment of the present invention, referring to fig. 3, the method according to the embodiment of the present invention may include the following steps:
s31, acquiring the working condition of the refrigerator, wherein the working condition comprises the following steps: ambient temperature, actual temperature of the target compartment, and set temperature of the target compartment.
In some embodiments, optionally, the operation characteristic of the refrigerator is obtained by detecting a target rotation speed of the refrigerator under each working condition by the performance testing device, and recording the working condition and the corresponding target rotation speed to generate the operation characteristic of the refrigerator; the target rotation speed is the compressor rotation speed when the performance index of the refrigerator is within a preset performance index threshold range.
In a specific compressor rotation speed control process, any refrigerator can be defined as the refrigerator of the embodiment, and the compressor rotation speed control method provided by the application is applied to the refrigerator of the embodiment.
In the design stage of the refrigerator, various working conditions of the refrigerator are adjusted by utilizing a performance testing device of the refrigerator, the running characteristics of the refrigerator are recorded, the target rotating speed of the refrigerator under different working conditions is obtained, and the target rotating speed is the rotating speed of a compressor when the performance index of the refrigerator is within the range of the preset performance index threshold value, and the target rotating speed is recorded. Wherein, the working condition can include: the ambient temperature of the refrigerator, the actual temperature of the target compartment, and the set temperature of the target compartment. The performance index threshold range may be [1.75,2], for example, the performance index may be 2, and the corresponding compressor rotation speed when the performance index is 2 is determined as the target rotation speed, that is, the optimal rotation speed; when the performance index cannot be met and is 2, the performance index can be gradually reduced, the rotating speed of the compressor corresponding to the maximum value in the range is taken as the target rotating speed, namely the optimal rotating speed, and the target rotating speed is recorded. It should be noted that the specific values of the performance index threshold range are merely exemplary and not limiting.
When the refrigerator runs, the working condition of the refrigerator can be acquired through the temperature sensor of the refrigerator, for example, the ambient temperature of the refrigerator and the actual temperature of the target compartment can be acquired through the temperature sensor, and the set temperature of the target compartment can be acquired. The target compartment may be a refrigerating compartment or a freezing compartment, and is not particularly limited herein.
And S32, determining a target rotating speed corresponding to the working condition based on the running characteristic of the refrigerator.
For example, since the operation characteristic of the refrigerator, that is, the target rotation speed corresponding to the operating condition is stored in advance, after the operating condition of the refrigerator is obtained, the target rotation speed corresponding to the operating condition may be matched and confirmed in the operation characteristic stored in advance according to the current operating condition of the refrigerator, for example, the target rotation speed is the optimal rotation speed.
For example, when the ambient temperature is 20 ℃, the set temperature is-5 ℃ and the actual temperature is 0 ℃, the corresponding target rotating speed is 2000 rpm of the compressor at third gear, and the target rotating speed of the compressor is determined to be the rotating speed at third gear. It should be noted that the operating conditions and operating characteristics are merely exemplary and not limiting.
And S33, calculating the total cooling capacity required by the target compartment to reach the set temperature.
In some embodiments, optionally, comprising: and determining the output refrigerating capacity of the compressor, and determining the total refrigerating capacity according to the output refrigerating capacity of the compressor.
For example, in the present embodiment, the total cooling capacity required for the target compartment to reach the set temperature may be calculated according to the following method:
the heat load of the refrigerator is equivalent to a refrigerating rate, and the total value of the heat load in the time span, namely the refrigerating capacity required by the time span, is obtained by accumulating the refrigerating rate in the time span.
For example, after the door is opened and closed, the refrigeration loss is generated, and the refrigeration loss at the moment can be understood as a heat load fluctuation of the refrigerator in the running state, the refrigeration loss caused by opening and closing the door is obtained through experiments, and the heat load fluctuation caused by opening and closing the door in the whole time period is solved according to the total running time and the door opening and closing probability.
The heat load is an important parameter of the refrigerator, is related to the structure, volume and door body material of the refrigerator, and mainly comprises a leakage heat load Qa, a storage heat load Qb, a door opening and closing heat load Qc and a heating heat load Qd. The leakage heat load is the most important heat load, and the door opening and closing heat load and the heating heat load are measured through experiments.
Wherein K is the heat transfer coefficient, F is the heat transfer area, TOuter coverIs the external ambient temperature, TInner partIs the refrigerator interior temperature.
QT(t)＝Qa(t)+Qb(t)+Qc(t)+Qd(t) (2)
Wherein Q isTIs the total heat load.
In a specific implementation process, the operation condition of the refrigerator can be detected, so that the total heat load of the refrigerator is obtained according to the formula (2). And calculating the total cooling capacity required by the target compartment to reach the set temperature according to the total heat load.
The total heat load over a period of time is the total cooling capacity over a period of time.
And defining the temperature variation of the interval time delta T of the last stage as delta T, and the output refrigerating capacity of the compressor as Qo.
In equation (3), a temperature change, i.e., T, is setInner partIn this formula, TInner partIs a variable, the end result is TInner partReaches a set temperature Tb. Therefore, according to equation (3), the value of the output cooling capacity Qo of the compressor is: a value corresponding to the rotational speed of the compressor. And the total refrigerating capacity is the accumulation of Qo in the time length. When Qo is known, Q can be calculated by equation (3)bThe value of (c). The storage heat load is calculated according to the formula (3) to obtain a reference value of the current refrigerator.
And S34, calculating the time length required for the target compartment to reach the set temperature when the compressor of the refrigerator runs at the target rotating speed according to the total refrigerating capacity.
For example, after the total cooling capacity required for the target compartment to reach the set temperature is obtained through calculation, the time length required for the target compartment to reach the set temperature when the compressor of the refrigerator runs at the target rotating speed is calculated according to the total cooling capacity and the time length calculation formula.
In some embodiments, optionally, the leakage heat load, the storage heat load, the door opening and closing heat load, and the heating heat load of the refrigerator are obtained, and the total heat load of the refrigerator in the time length required for the target compartment to reach the set temperature is calculated; and calculating the time length required by the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
For example, the calculation method may be:
and defining the time of the refrigerator chamber reaching the set temperature as t, and obtaining the estimated time according to a formula (4).
In the formula (4), the left side is the total cooling capacity output by the compressor, i.e. the compressor output cooling capacity QoAnd multiplying by time, wherein Qo is the output refrigerating capacity corresponding to the compressor under the optimal rotating speed, and confirming according to the specific compressor model. On the right is the total heat load during this time T, including the leakage heat load Qa, the storage heat load Qb, the door opening and closing heat load Qc, and the heating heat load Qd, wherein mainly the leakage heat load is related to the internal temperature and the external temperature of the refrigerator, and T is the temperature of the refrigeratorInner partIs continuously changed along with the operation of the refrigerator, and finally TInner partReaches the set temperature. Therefore, the magnitude of the time t can be obtained from equation (4).
And S35, adjusting the rotation speed of the compressor according to the time length.
For example, the rotation of the compressor may be adjusted according to the time period.
In some embodiments, optionally, adjusting the speed of the compressor based on the duration comprises: judging whether the duration is less than or equal to a first duration threshold, and reducing the rotating speed of the compressor if the duration is less than or equal to the first duration threshold; if the duration is greater than the first duration threshold, judging whether the duration is less than or equal to a second duration threshold, and if the duration is less than or equal to the second duration threshold, controlling the compressor to operate at the target rotating speed; and if the duration is greater than the second duration threshold, increasing the rotating speed of the compressor.
For example, in a specific implementation process, the first duration threshold and the second duration threshold may be set according to a requirement, and the second duration threshold is greater than the first duration threshold. When the calculated time length is less than or equal to the first time length threshold value, the refrigeration is too fast, necessary energy waste is generated, and the rotating speed of the compressor can be reduced. When the calculated length of time is between the first length of time threshold (excluding the first time threshold) and the second length of time threshold (including the second length of time threshold), indicating that the refrigeration rate is satisfactory, the compressor may be controlled to operate at the determined template speed. And when the calculated time length is higher than a second time length threshold value, the refrigerating speed is slow, and the running speed of the compressor is increased.
According to the compressor rotating speed control method provided by the embodiment of the invention, the target rotating speed corresponding to the current working condition is determined by acquiring the current working condition of the refrigerator and matching the current working condition with the running characteristic of the refrigerator; the total refrigerating capacity of the refrigerator, which is required to reach the set temperature, is calculated, the time length for reaching the preset temperature when the refrigerator runs at the target rotating speed is calculated according to the total refrigerating capacity, so that the rotating speed of the compressor is adjusted according to the time length, the refrigerating efficiency of the refrigerator can be met, and meanwhile, the refrigerating performance index of the refrigerator can be maintained to be optimal. The technical problems that the running performance of the refrigerator at different gears is difficult to guarantee and energy waste is generated to a certain degree by a rotating speed control method of fixing a set temperature corresponding to a fixed compressor rotating speed gear in the prior art are solved.
Acquiring the cold loss of the refrigerator in a preset time period, and calculating the total refrigerating capacity required by the target compartment to reach a set temperature according to the cold loss;
based on a general inventive concept, embodiments of the present invention also provide a compressor rotation speed control apparatus.
Fig. 4 is a schematic structural diagram of a rotational speed control apparatus of a compressor according to an embodiment of the present invention, referring to fig. 4, the apparatus according to the embodiment of the present invention may include the following structures: an acquisition module 41, a determination module 42, a first calculation module 43, a second calculation module 44, and an adjustment module 45.
The obtaining module 41 is configured to obtain an operating condition of the refrigerator, where the operating condition includes: the ambient temperature, the actual temperature of the target compartment and the set temperature of the target compartment;
a determination module 42 for determining a target rotation speed corresponding to the operation condition based on the operation characteristic of the refrigerator;
the first calculating module 43 is used for calculating the total refrigerating capacity required by the target compartment to reach the set temperature;
the second calculating module 44 is configured to calculate, according to the total refrigerating capacity, a time period required for the target compartment to reach a set temperature when the compressor of the refrigerator operates at the target rotational speed;
and the adjusting module 45 is used for adjusting the rotating speed of the compressor according to the time length.
Optionally, the adjusting module 45 is configured to determine whether the duration is less than or equal to a first duration threshold, and reduce the rotation speed of the compressor if the duration is less than or equal to the first duration threshold; if the duration is greater than the first duration threshold, judging whether the duration is less than or equal to a second duration threshold, and if the duration is less than or equal to the second duration threshold, controlling the compressor to operate at the target rotating speed; and if the duration is greater than the second duration threshold, increasing the rotating speed of the compressor.
Optionally, the second calculating module 44 is configured to obtain a heat leakage load, a storage heat load, a door opening/closing heat load, and a heating heat load of the refrigerator, and calculate a total heat load of the refrigerator within a time period required for the target compartment to reach the set temperature; and calculating the time length required by the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
Optionally, the system further comprises an obtaining module, configured to detect a target rotation speed of the refrigerator under each working condition through a performance testing device, and record the working condition and a corresponding target rotation speed to generate an operating characteristic of the refrigerator; the target rotating speed is the rotating speed of the compressor when the performance index of the refrigerator is within a preset performance index threshold range.
Optionally, the first calculating module 43 is configured to determine an output cooling capacity of the compressor, and determine the total cooling capacity according to the output cooling capacity of the compressor.
Optionally, the second calculating module 44 is configured to obtain a heat leakage load, a storage heat load, a door opening/closing heat load, and a heating heat load of the refrigerator, and calculate a total heat load of the refrigerator within a time period required for the target compartment to reach the set temperature; and calculating the time required for the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
According to the compressor rotating speed control device provided by the embodiment of the invention, the target rotating speed corresponding to the current working condition is determined by acquiring the current working condition of the refrigerator and matching the current working condition with the running characteristic of the refrigerator; the total refrigerating capacity of the refrigerator, which is required to reach the set temperature, is calculated, the time length for reaching the preset temperature when the refrigerator runs at the target rotating speed is calculated according to the total refrigerating capacity, so that the rotating speed of the compressor is adjusted according to the time length, the refrigerating efficiency of the refrigerator can be met, and meanwhile, the refrigerating performance index of the refrigerator can be maintained to be optimal. The technical problems that the running performance of the refrigerator at different gears is difficult to guarantee and energy waste is generated to a certain degree by a rotating speed control method of fixing a set temperature corresponding to a fixed compressor rotating speed gear in the prior art are solved.
Based on one general inventive concept, embodiments of the present invention also provide a compressor rotation speed control apparatus.
Fig. 5 is a schematic structural diagram of a rotational speed control apparatus of a compressor according to an embodiment of the present invention, referring to fig. 5, the rotational speed control apparatus of a compressor according to an embodiment of the present invention includes: a processor 51, and a memory 52 connected to the processor.
The memory 52 is used for storing a computer program at least used for the compressor rotation speed control method described in any of the above embodiments;
the processor 51 is used for calling and executing computer programs in the memory
Based on one general inventive concept, the embodiment of the invention also provides a refrigerator.
Fig. 6 is a schematic structural diagram of a refrigerator according to an embodiment of the present invention, referring to fig. 6, the refrigerator according to the embodiment of the present invention includes: compressor a and the compressor rotational speed control apparatus described in the above embodiments; the compressor is connected with a compressor speed control device B.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that the terms "first," "second," and the like in the description of the present invention are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present invention, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as representing modules, segments, or portions of code which include one or more executable instructions for implementing specific logical functions or steps of the process, and alternate implementations are included within the scope of the preferred embodiment of the present invention in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the present invention.
It should be understood that portions of the present invention may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present invention may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (8)
1. A method for controlling the rotating speed of a compressor is characterized by being applied to a refrigerator and comprising the following steps:
acquiring the working condition of the refrigerator, wherein the working condition comprises the following steps: the ambient temperature, the actual temperature of the target compartment and the set temperature of the target compartment;
determining a target rotation speed corresponding to the working condition based on the operating characteristics of the refrigerator;
calculating the total refrigerating capacity required by the target compartment to reach the set temperature;
calculating the time length required by the target compartment to reach the set temperature when a compressor of the refrigerator runs at the target rotating speed according to the total refrigerating capacity;
adjusting the rotation speed of the compressor according to the time length;
the adjusting the rotation speed of the compressor according to the time length comprises the following steps:
judging whether the duration is less than or equal to a first duration threshold, and if the duration is less than or equal to the first duration threshold, reducing the rotating speed of the compressor;
if the duration is greater than a first duration threshold, judging whether the duration is less than or equal to a second duration threshold, and if the duration is less than or equal to the second duration threshold, controlling the compressor to operate at the target rotating speed; and if the duration is greater than the second duration threshold, increasing the rotating speed of the compressor.
2. The method according to claim 1, wherein the operational characteristics of the refrigerator are obtained by detecting a target rotational speed of the refrigerator under each operating condition by a performance testing device, and recording the operating condition and the corresponding target rotational speed to generate the operational characteristics of the refrigerator; the target rotating speed is the rotating speed of the compressor when the performance index of the refrigerator is within a preset performance index threshold range.
3. The method of claim 1, wherein said calculating a total cooling capacity required for said target compartment to reach said set temperature comprises:
and determining the output refrigerating capacity of the compressor, and determining the total refrigerating capacity according to the output refrigerating capacity of the compressor.
4. The method of claim 1, wherein calculating a time period required for the target compartment to reach the set temperature when the compressor of the refrigerator is operated at the target rotational speed based on the total cooling capacity comprises:
acquiring the leakage heat load, the storage heat load, the door opening and closing heat load and the heating heat load of the refrigerator, and calculating the total heat load of the refrigerator within the time length required by the target compartment to reach the set temperature;
and calculating the time required for the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
5. A compressor rotation speed control device is characterized by being applied to a refrigerator, and the device comprises: the device comprises an acquisition module, a determination module, a first calculation module, a second calculation module and an adjustment module;
the acquisition module is used for acquiring the working condition of the refrigerator, and the working condition comprises the following steps: the ambient temperature, the actual temperature of the target compartment and the set temperature of the target compartment;
the determining module is used for determining a target rotating speed corresponding to the working condition based on the running characteristic of the refrigerator;
the first calculating module is used for calculating the total refrigerating capacity required by the target compartment to reach the set temperature;
the second calculating module is used for calculating the time length required by the target compartment to reach the set temperature when the compressor of the refrigerator runs at the target rotating speed according to the total refrigerating capacity;
the adjusting module is used for adjusting the rotating speed of the compressor according to the duration;
the adjusting module is used for judging whether the duration is less than or equal to a first duration threshold, and reducing the rotating speed of the compressor if the duration is less than or equal to the first duration threshold; if the duration is greater than a first duration threshold, judging whether the duration is less than or equal to a second duration threshold, and if the duration is less than or equal to the second duration threshold, controlling the compressor to operate at the target rotating speed; and if the duration is greater than the second duration threshold, increasing the rotating speed of the compressor.
6. The apparatus of claim 5, wherein the second calculating module is configured to obtain a heat leakage load, a storage heat load, a door opening/closing heat load, and a heating heat load of the refrigerator, and calculate a total heat load of the refrigerator for a period of time required for a target compartment to reach the set temperature; and calculating the time required for the target compartment to reach the set temperature according to the total refrigerating capacity and the total heat load.
7. A compressor rotation speed control apparatus, characterized by comprising: a processor, and a memory coupled to the processor;
the memory is used for storing a computer program, and the computer program is at least used for executing the compressor rotating speed control method of any one of claims 1 to 4;
the processor is used for calling and executing the computer program in the memory.
8. A refrigerator, characterized by comprising: a compressor and a compressor rotational speed control apparatus as recited in claim 7 above; the compressor is connected with the compressor rotating speed control device.
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| CN113503684B (en) * | 2021-07-21 | 2022-10-28 | 珠海格力电器股份有限公司 | Refrigerator energy-saving control method, refrigerator and computer readable storage medium |
| CN113865257B (en) * | 2021-10-11 | 2023-01-20 | 珠海格力电器股份有限公司 | Refrigerator control method, device and system and refrigerator |
| CN115978903A (en) * | 2023-01-09 | 2023-04-18 | 珠海格力电器股份有限公司 | Refrigerator compartment temperature control method and device and refrigerator |
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