CN106196788A - The control method for frequency of compressor of air conditioner and device - Google Patents

The control method for frequency of compressor of air conditioner and device Download PDF

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Publication number
CN106196788A
CN106196788A CN201610555466.7A CN201610555466A CN106196788A CN 106196788 A CN106196788 A CN 106196788A CN 201610555466 A CN201610555466 A CN 201610555466A CN 106196788 A CN106196788 A CN 106196788A
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China
Prior art keywords
compressor
time period
frequency
temperature difference
current time
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Granted
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CN201610555466.7A
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Chinese (zh)
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CN106196788B (en
Inventor
张永良
康月
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Hisense Air Conditioning Co Ltd
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Hisense Shandong Air Conditioning Co Ltd
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Priority to CN201610555466.7A priority Critical patent/CN106196788B/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B49/00—Arrangement or mounting of control or safety devices
    • F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
    • F25B49/022—Compressor control arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B29/00—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously
    • F25B29/003—Combined heating and refrigeration systems, e.g. operating alternately or simultaneously of the compression type system
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
    • F25B47/02—Defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2347/00—Details for preventing or removing deposits or corrosion
    • F25B2347/02—Details of defrosting cycles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B2600/00—Control issues
    • F25B2600/02—Compressor control
    • F25B2600/021—Inverters therefor

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The embodiment of the present invention provides control method for frequency and the device of a kind of compressor of air conditioner.The method includes: according to second temperature difference in first temperature difference in current time period, and the upper a period of time adjacent with current time period, it is thus achieved that the first difference variation value of adjacent two time cycles；According to described first difference variation value, described first temperature difference and the first default mapping relations, determine the first frequency adjusted value of current time period inner compressor；According to compressor target frequency in upper a period of time and described first frequency adjusted value, determine compressor target frequency in current time period.The embodiment of the present invention by determining the first frequency adjusted value of current time period from two dimensions of difference variation value of the temperature difference He former and later two time cycles, so that it is less to the span of the FREQUENCY CONTROL of compressor, the running frequency of compressor can be accurately controlled, substantially increase the temperature control degree of accuracy of air-conditioning, improve the experience of user.

Description

Frequency control method and device for air conditioner compressor
Technical Field
The embodiment of the invention relates to a frequency control technology, in particular to a frequency control method and device of an air conditioner compressor.
Background
With the continuous development of social economy, the air conditioner becomes an increasingly common electric appliance in the life of people. The inverter air conditioner is gradually accepted and purchased by more and more people due to the characteristics that the rotating speed of the compressor is variable, the flow rate of the circulating refrigerant of the system can be changed along with the change of the environment and the energy is relatively saved. The inverter air conditioner controls the indoor temperature to achieve the effects of energy saving and comfort through the running frequency (or the rotating speed) of the compressor, the frequency control of the compressor is one of the core technologies of the inverter air conditioner, and the reliability, the comfort and the energy saving effect of the inverter air conditioner are determined by the quality of the control method.
In the prior art, a frequency control method for a compressor of a common inverter air conditioner mainly adjusts the operating frequency of the compressor according to the temperature difference between the ambient temperature and the set temperature, and specifically includes: the operating frequency range of the whole compressor is divided into a plurality of frequency gears, the difference between every two gears is several hertz or dozens of hertz, and the temperature difference of different intervals corresponds to different frequency gears. Therefore, the frequency of the compressor which should be operated at present can be determined according to the corresponding relation between the temperature difference and the frequency gear and the temperature difference calculated at present.
However, the frequency control method of the compressor in the prior art has inaccurate temperature control and low user experience.
Disclosure of Invention
The embodiment of the invention provides a frequency control method and device of an air conditioner compressor, which are used for solving the technical problems that the temperature control of the frequency control method of the compressor in the prior art is not accurate and the user experience is not high.
In a first aspect, the present invention provides a frequency control method for an air conditioner compressor, including:
obtaining a first temperature difference change value of two adjacent time periods according to a first temperature difference in the current time period and a second temperature difference in the last time period adjacent to the current time period;
determining a first frequency adjustment value of the compressor in the current time period according to the first temperature difference change value, the first temperature difference and a preset first mapping relation; the first mapping relation comprises mapping relations among different temperature difference change values, different temperature differences and different frequency adjustment values;
and determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjustment value.
In a possible implementation manner, the determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjustment value specifically includes:
and adding the target frequency of the compressor in the last time period and the first frequency adjustment value to determine the target frequency of the compressor in the current time period.
In another possible implementation manner, the obtaining a first temperature difference change value of two adjacent time periods according to a first temperature difference in a current time period and a second temperature difference in a previous time period adjacent to the current time period specifically includes:
and subtracting the difference value of the second temperature difference from the first temperature difference to determine the first temperature difference change value.
In yet another possible embodiment, the method further comprises:
if the set temperature of the air conditioner changes in the current time period, re-determining a new first temperature difference change value and a new first temperature difference, and determining a new first frequency adjustment value according to the new first temperature difference change value, the new first temperature difference and the first mapping relation;
and determining a new target frequency of the compressor in the current time period according to the new first frequency adjustment value.
In another possible embodiment, the method further comprises:
if the operation mode of the air conditioner changes in the current time period, determining that the target frequency of the compressor in the current time period is 0;
the method comprises the steps of indicating the compressor to run by adopting a preset initial frequency, and re-determining the target frequency of the compressor in the current time period after the compressor runs for a preset time length by adopting the preset initial frequency; wherein the operation modes include: at least one of a cooling mode, a heating mode, a defrost mode, an auto mode, a timed mode, and a protection mode.
In another possible embodiment, the method further comprises:
if the target frequency of the compressor in the current time period is greater than the maximum operation frequency of the compressor, determining that the target frequency of the compressor in the current time period is equal to the maximum operation frequency, and indicating that the compressor adopts the maximum operation frequency in actual operation;
or,
if the target frequency of the compressor in the current time period is less than the minimum running frequency of the compressor, indicating the compressor to adopt the minimum running frequency in actual running;
or,
if the air conditioner works in a defrosting mode, indicating that the compressor adopts a preset defrosting operation frequency in actual operation;
or,
and if the air conditioner is in the protection mode, indicating that the compressor adopts a preset protection mode operation frequency in the actual operation, and indicating that the compressor adopts the target frequency in the current time period in the actual operation after the protection mode is released.
In a second aspect, the present invention provides a frequency control device of an air conditioner compressor, comprising:
the acquisition module is used for acquiring a first temperature difference change value of two adjacent time periods according to a first temperature difference in the current time period and a second temperature difference in the last time period adjacent to the current time period;
the first determining module is used for determining a first frequency adjusting value of the compressor in the current time period according to the first temperature difference change value, the first temperature difference and a preset first mapping relation; the first mapping relation comprises mapping relations among different temperature difference change values, different temperature differences and different frequency adjustment values;
and the second determining module is used for determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjusting value.
In a possible implementation manner, the second determining module is specifically configured to determine the target frequency of the compressor in the current time period as a sum of the target frequency of the compressor in the previous time period and the first frequency adjustment value.
In another possible implementation manner, the obtaining module is specifically configured to determine a difference value obtained by subtracting the second temperature difference from the first temperature difference as the first temperature difference change value.
In yet another possible embodiment, the apparatus further comprises:
and the processing module is used for re-determining a new first temperature difference change value and a new first temperature difference when the set temperature of the air conditioner changes in the previous time period, determining a new first frequency adjustment value according to the new first temperature difference change value, the new first temperature difference and the first mapping relation, and determining a new target frequency of the compressor in the current time period according to the new first frequency adjustment value.
In another possible embodiment, the processing module is further configured to determine that the target frequency of the compressor in the current time period is 0 when the operation mode of the air conditioner changes in the current time period; the compressor is instructed to operate at a preset initial frequency, and after the compressor operates at the preset initial frequency for a preset time period, the target frequency of the compressor in the current time period is determined again; wherein the operation modes include: at least one of a cooling mode, a heating mode, a defrost mode, an auto mode, a timed mode, and a protection mode.
In another possible embodiment, the processing module is further configured to determine that the target frequency of the compressor in the current time period is equal to the maximum operating frequency and instruct the compressor to adopt the maximum operating frequency when the compressor is actually operated, when the target frequency of the compressor in the current time period is greater than the maximum operating frequency of the compressor;
or,
when the target frequency of the compressor in the current time period is less than the minimum operating frequency of the compressor, indicating the compressor to adopt the minimum operating frequency in actual operation;
or,
when the air conditioner works in a defrosting mode, indicating the compressor to adopt a preset defrosting operation frequency in actual operation;
or,
and when the air conditioner is in the protection mode, indicating the compressor to adopt a preset protection mode operation frequency in the actual operation, and after the protection mode is released, indicating the compressor to adopt the target frequency in the current time period in the actual operation.
According to the frequency control method and device of the air conditioner compressor, the first temperature difference change value of two adjacent time periods is obtained, the first frequency adjustment value of the compressor in the current time period is determined according to the first temperature difference change value, the first temperature difference in the current time period and the preset first mapping relation, and therefore the target frequency of the compressor in the current time period is determined according to the target frequency of the compressor in the last time period and the first frequency adjustment value. According to the method, the first frequency adjustment value of the current time period is determined from two dimensions of the temperature difference and the change value (or the change amplitude of the temperature difference) of the temperature difference of the two time periods before and after the temperature difference, so that the span of frequency control of the compressor is small, the running frequency of the compressor can be accurately controlled, the temperature control accuracy of the air conditioner is greatly improved, and the user experience is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a first embodiment of a frequency control method for an air conditioner compressor according to the present invention;
fig. 2 is a schematic flow chart of a second embodiment of a frequency control method for an air conditioner compressor according to the present invention;
fig. 3 is a schematic flow chart of a third embodiment of a frequency control method for an air conditioner compressor according to the present invention;
FIG. 4 is a schematic structural diagram of a first embodiment of a frequency control apparatus of an air conditioner compressor according to the present invention;
fig. 5 is a schematic structural diagram of a second embodiment of a frequency control device of an air conditioner compressor according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be understood that the described embodiments are only some embodiments of the invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
It should be understood that although the terms first, second, third, etc. may be used to describe XXX in embodiments of the present invention, these XXX should not be limited to these terms. These terms are only used to distinguish XXX from each other. For example, a first XXX may also be referred to as a second XXX, and similarly, a second XXX may also be referred to as a first XXX, without departing from the scope of embodiments of the present invention. In addition, the first temperature difference of the current time period and the second temperature difference of the previous time period according to the embodiments of the present invention are intended to illustrate that, as long as the temperature differences calculated in the current time period are all the first temperature differences, the temperature differences calculated in the previous time period adjacent to the current time period are all the second temperature differences, and when the time reaches the next time period, the next time period is the new current time period, and the first temperature difference of the previous current time period is equivalent to one second temperature difference for the next time period.
The words "if", as used herein, may be interpreted as "at … …" or "at … …" or "in response to a determination" or "in response to a detection", depending on the context. Similarly, the phrases "if determined" or "if detected (a stated condition or event)" may be interpreted as "when determined" or "in response to a determination" or "when detected (a stated condition or event)" or "in response to a detection (a stated condition or event)", depending on the context.
It is also noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a commodity or system that includes the element.
The frequency control method and the frequency control device of the air conditioner compressor provided by the embodiment of the invention can be suitable for variable frequency air conditioners with any type, any size and any structure, for example, the frequency control device can be suitable for wall-mounted air conditioners, cabinet air conditioners, window air conditioners, ceiling air conditioners and the like. The embodiment of the invention provides a frequency control method and device of an air conditioner compressor, and aims to solve the technical problem that the frequency control of the air conditioner compressor in the prior art is not accurate enough, so that the temperature control accuracy of an air conditioner is low. In the embodiment of the invention, the target frequency of the compressor in the current time period is determined by two dimensions of the temperature difference and the change value of the temperature difference, so that the precision of frequency control of the compressor is greatly improved, and the precision of temperature control of the air conditioner is further improved.
Optionally, the execution main body in the embodiment of the present invention may be a frequency control device of an air conditioner compressor, or may be an air conditioner integrating the frequency control device of the air conditioner compressor, where the frequency control device of the air conditioner compressor may be implemented by software, hardware, or a combination of software and hardware. The main body of execution in the following embodiments is described by taking an air conditioner as an example.
The technical solution of the present invention will be described in detail below with specific examples. The following several specific embodiments may be combined with each other, and details of the same or similar concepts or processes may not be repeated in some embodiments.
Fig. 1 is a schematic flowchart of a first embodiment of a frequency control method for an air conditioner compressor according to an embodiment of the present invention. The present embodiment relates to a specific process in which the frequency control means determines the target frequency of the compressor for the current time period by two dimensions from the temperature difference and the variation value of the temperature difference. As shown in fig. 1, the method may include the steps of:
s101: and obtaining a first temperature difference change value of two adjacent time periods according to the first temperature difference in the current time period and the second temperature difference in the last time period adjacent to the current time period.
Specifically, after the air conditioner receives an indoor starting instruction, the compressor is started; optionally, after the air conditioner receives the indoor startup instruction, the current indoor temperature difference may be calculated first, and the specific calculation process is as follows: setting the indoor environment temperature as Tin, the set temperature of an air conditioner remote controller as Tset and the indoor temperature difference as E, wherein when the air conditioner operates in heating, the E is Tset-Tin (formula 1); when the air conditioner operates in a cooling mode, E is Tin-Tset (formula 2). After the air conditioner obtains the current indoor temperature difference, whether the current indoor temperature difference is larger than or equal to a preset temperature difference threshold value (for example, whether the current indoor temperature difference is larger than or equal to-2 ℃) or not is judged, if the current indoor temperature difference is larger than or equal to the temperature difference threshold value, the compressor is indicated to be started, the compressor is enabled to operate to a preset initial frequency value F0, and in order to maintain the balance of the air conditioning system, after the frequency of the compressor rises to F0, the compressor is operated for a period of time at the frequency of F0 (t _ first).
After the air conditioner operates for a period of time at the frequency of F0, the operating frequency of the compressor tends to be stable, and at this time, the air conditioner obtains a first temperature difference E (n) in a current time period and a second temperature difference E (n-1) in a previous time period adjacent to the current time period, and specifically, the first temperature difference E (n) and the second temperature difference E (n-1) are obtained by calculating using the above formula 1 or formula 2. Then, a first temperature difference change value Δ e (n) of two adjacent time periods is obtained according to the first temperature difference and the second temperature difference, and optionally, the Δ e (n) may be a positive value or a negative value, and the Δ e (n) may be equal to a difference between the first temperature difference and the second temperature difference, or may be a weighted value of the difference between the first temperature difference and the second temperature difference, or may be a value obtained by performing other operations on the first temperature difference and the second temperature difference (for example, a ratio between the first temperature difference and the second temperature difference, and the like).
S102: and determining a first frequency adjustment value of the compressor in the current time period according to the first temperature difference change value, the first temperature difference and a preset first mapping relation.
The first mapping relation comprises mapping relations among different temperature difference change values, different temperature differences and different frequency adjustment values.
Specifically, the first mapping relationship related to this embodiment includes mapping relationships between different temperature difference change values Δ E, different temperature differences E, and different frequency adjustment values Δ F, and it should be noted that the temperature difference change value here is a dimension, the temperature difference is another dimension, a temperature difference and a temperature difference change value corresponding to the temperature difference form a two-dimensional group, and each two-dimensional group corresponds to a frequency adjustment value, so that different temperature difference change values and different first temperature differences correspond to different frequency adjustment values. For example, the mapping relationship can be seen in table 1, where "X1" and "Xn" and "…" in table 1 each represent a frequency adjustment value.
TABLE 1
As can be seen from table 1, different temperature differences, different temperature difference variation values, and different frequency adjustment values correspond one-to-one. Thus, after the air conditioner obtains the first temperature difference change value and the first temperature difference according to the step of S101, the first frequency adjustment value Δ f (n) in the current time period corresponding to the first temperature difference change value and the first temperature difference dimension can be determined according to the table 1. Optionally, the first frequency adjustment value may be a hertz value with units, or may also be a ratio, a multiple value, or the like.
Of course, table 1 is only an example of the first mapping relationship, and the expression form of the first mapping relationship is not limited in the embodiment of the present invention.
S103: and determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjustment value.
Specifically, after the air conditioner obtains the first frequency adjustment value, the target frequency f (n) of the compressor in the current time period may be determined according to the previously recorded target frequency in the last time period and the first frequency adjustment value in the current time period. Optionally, the target frequency of the compressor in the current time period may be a sum of the target frequency in the previous time period and the first frequency adjustment value in the current time period, or may be a weighted value of the sum of the target frequency in the previous time period and the first frequency adjustment value in the current time period, or may be a value obtained by performing other calculation processes on the target frequency in the previous time period and the first frequency adjustment value in the current time period, for example, assuming that the first frequency adjustment value is a ratio of a multiplication process or a division process performed on the target frequency in the previous time period, the target frequency of the compressor in the current time period may be equal to a result of the multiplication or the division of the target frequency in the previous time period by the first frequency adjustment value, and therefore, the embodiment of the present invention does not obtain the target frequency of the compressor in the current time period according to the first frequency adjustment value and the target frequency in the previous time period And (5) limiting. In this way, the target frequency of the compressor in the current time period can be obtained. In addition, when the set temperature, the control mode, and the like of the air conditioner are not changed, the target frequency of the compressor in the new current time period still needs to be calculated according to the processes of S101 to S103 for the different time periods when the air conditioner runs to the different time periods, that is, when the time reaches the next time period (that is, the next time period is the new current time period), that is, for the different time periods, the target frequency of the compressor needs to be recalculated.
It should be noted that the target frequency of the compressor in the current time period or the target frequency of the compressor in the last time period in the embodiment of the present invention may be the actual operating frequency of the compressor, or may also be the theoretical calculated frequency of the compressor (i.e. there is a possibility that the actual operating frequency of the compressor is different from the theoretical calculated frequency of the compressor), for example, if the target frequency f (n) of the compressor in the current time period obtained above is less than the minimum operating frequency of the compressor, the compressor may be operated at the minimum operating frequency but when the time reaches the next time period (i.e., the next time period is a new current time period, and the original current time period is a new previous time period), f (n) is still used as the target frequency of the previous time period, rather than the minimum operating frequency.
In summary, in the prior art, when the frequency of the compressor is controlled, a single-dimensional control mode is often adopted, and the span range of frequency control is large, but in the embodiment of the present invention, the first frequency adjustment value of the current time period is determined from two dimensions, namely, the temperature difference and the change value (or the change amplitude of the temperature difference) of the temperature difference between the previous time period and the next time period, so that the span of frequency control of the compressor is small, the operation frequency of the compressor can be accurately controlled, and the temperature control accuracy of the air conditioner is greatly improved.
According to the frequency control method of the air conditioner compressor provided by the embodiment of the invention, the first temperature difference change value of two adjacent time periods is obtained, and the first frequency adjustment value of the compressor in the current time period is determined according to the first temperature difference change value, the first temperature difference in the current time period and the preset first mapping relation, so that the target frequency of the compressor in the current time period is determined according to the target frequency of the compressor in the last time period and the first frequency adjustment value. According to the method, the first frequency adjustment value of the current time period is determined from two dimensions of the temperature difference and the change value (or the change amplitude of the temperature difference) of the temperature difference of the two time periods before and after the temperature difference, so that the span of frequency control of the compressor is small, the running frequency of the compressor can be accurately controlled, the temperature control accuracy of the air conditioner is greatly improved, and the user experience is improved.
Optionally, as a possible implementation manner of the embodiment of the present invention, when the first frequency adjustment value represents a specific frequency compensation value of the compressor, the step S103 may specifically be: and adding the target frequency F (n-1) of the compressor in the last time period and the first frequency adjustment value DeltaF (n) to determine the target frequency F (n) of the compressor in the current time period, namely F (n) ═ F (n-1) + DeltaF (n).
Optionally, as a possible implementation manner of the embodiment of the present invention, when the change in the temperature difference between two adjacent time periods is characterized by the difference between the temperature differences between the two time periods, the step S101 may specifically be: and subtracting the difference value of the second temperature difference E (n-1) from the first temperature difference E (n) to determine a first temperature difference change value delta E (n).
Fig. 2 is a flowchart illustrating a second method for controlling a frequency of an air conditioner compressor according to an embodiment of the present invention. On the basis of the above embodiments, the present embodiment relates to a specific process of how to control the operating frequency of the compressor when the user changes the current set temperature of the air conditioner. As shown in fig. 2, the method may include the steps of:
s201: and if the set temperature of the air conditioner changes in the current time period, re-determining a new first temperature difference change value and a new first temperature difference, and determining a new first frequency adjustment value according to the new first temperature difference change value, the new first temperature difference and the first mapping relation.
S202: and determining a new target frequency of the compressor in the current time period according to the new first frequency adjustment value.
Specifically, when the user changes the current set temperature of the air conditioner, the air conditioner needs to obtain a new first temperature difference change value again at this time according to the step of S101, which is because the first temperature difference in the current time period changes once the set temperature of the air conditioner changes, the corresponding first temperature difference change value changes, and the first temperature difference change value change, the corresponding first frequency adjustment value changes, and as a result, the target frequency of the compressor in the current time period also changes, so that if the user changes the set temperature of the air conditioner in the current time period, the air conditioner will automatically re-determine the new first temperature difference change value and the new first temperature difference according to the steps of S101 to S103, and according to the new first temperature difference change value, the new first temperature difference and the first mapping relationship, the new first frequency adjustment value is determined, and then the new target frequency of the compressor in the current time period is determined according to the new first frequency adjustment value, so that the temperature control of the air conditioner is combined with the use scene of the user, and the accurate adjustment is made aiming at the use scene, thereby greatly improving the frequency control precision of the compressor, enabling the temperature control of the air conditioner to be more accurate on the basis of combining the use scene of the user, and greatly improving the user experience.
According to the frequency control method of the air conditioner compressor provided by the embodiment of the invention, when the current set temperature of the air conditioner is changed by a user, the new target frequency of the compressor in the current time period is immediately determined again, so that the temperature control of the air conditioner is combined with the use scene of the user, and the accurate adjustment is made aiming at the use scene, therefore, the frequency control precision of the compressor is greatly improved, the temperature control of the air conditioner is more accurate on the basis of combining the use scene of the user, and the user experience is greatly improved.
Fig. 3 is a flowchart illustrating a third method for controlling a frequency of an air conditioner compressor according to an embodiment of the present invention. On the basis of the above embodiments, the present embodiment relates to a specific process of how to control the operating frequency of the compressor when the operating mode of the air conditioner changes in the current time period. As shown in fig. 3, the method may include the steps of:
s301: and if the operation mode of the air conditioner is changed in the current time period, determining that the target frequency of the compressor in the current time period is 0.
S302: and indicating the compressor to operate at a preset initial frequency, and re-determining the target frequency of the compressor in the current time period after the compressor operates at the preset initial frequency for a preset time period.
Wherein the operation modes include: at least one of a cooling mode, a heating mode, a defrost mode, an auto mode, a timed mode, and a protection mode.
Specifically, as described in the first embodiment, after the compressor is started, the compressor is continuously operated for a period of time at an initial frequency F0 to ensure that the frequency of the compressor is stable, so that when the operation mode of the air conditioner changes in the current time period, the air conditioner determines that the target frequency of the compressor in the current time period is 0, then instructs the compressor to operate at the preset initial frequency for a preset time period, and after the compressor operates at the preset initial frequency for the preset time period, re-determines the target frequency of the compressor in the current operation mode in the current time period according to the specific processes of S101 to S103 in the above embodiments, so that the temperature control of the air conditioner is combined with the current usage scenario and is accurately adjusted according to the usage scenario, thereby greatly improving the frequency control accuracy of the compressor, making the temperature control of the air conditioner more accurate on the basis of combining with the current usage scenario, the user experience is greatly improved.
Optionally, as a possible implementation manner of the embodiment of the present invention, when the target frequency of the compressor in the current time period is greater than the maximum operating frequency of the compressor, the air conditioner may determine that the target frequency of the compressor in the current time period is equal to the maximum operating frequency (i.e., the target frequency values calculated in S101 to S103 are discarded before), and instruct the compressor to operate at the maximum operating frequency during actual operation. When the time reaches the next time period (namely the next time period is a new current time period, and the original current time period is a new previous time period), the maximum operation frequency is taken as the target frequency of the previous time period, and then the target frequency of the compressor in the new current time period is calculated.
Optionally, as another possible implementation manner of the embodiment of the present invention, when the target frequency of the compressor in the current time period is less than the minimum operating frequency of the compressor, the air conditioner may instruct the compressor to adopt the minimum operating frequency when the compressor is actually operated, but the target frequency of the compressor in the current time period is still based on the results calculated in S101 to S103, that is, when the time reaches the next time period (that is, the next time period is a new current time period, and the original current time period is a new previous time period), the results calculated in S101 to S103 are taken as the target frequency of the previous time period, but not the minimum operating frequency of the compressor.
Optionally, as another possible implementation manner of the embodiment of the present invention, when the air conditioner operates in the defrosting mode, the air conditioner instructs the compressor to adopt the preset defrosting operation frequency during actual operation, but the target frequency of the compressor in the current time period is still based on the results calculated in S101 to S103, that is, when the time reaches the next time period (that is, the next time period is a new current time period, and the original current time period is a new previous time period), the results calculated in S101 to S103 are used as the target frequency of the previous time period, but not the defrosting operation frequency of the compressor.
Optionally, as another possible implementation manner of the embodiment of the present invention, when the air conditioner is in the protection mode, the air conditioner instructs the compressor to adopt the preset protection mode operating frequency during actual operation, but the target frequency of the compressor in the current time period is still based on the results calculated in S101 to S103, that is, when the time reaches the next time period (that is, the next time period is a new current time period, and the original current time period is a new previous time period), the results calculated in S101 to S103 are taken as the target frequency of the previous time period, but not the protection mode operating frequency of the compressor. When the protection mode of the fast air conditioner is released, the air conditioner instructs the compressor to adopt the target frequency in the current time period calculated through the above steps S101 to S103 when the compressor is actually operated.
In summary, the frequency control method of the air conditioner compressor provided by the embodiment of the invention can be used for controlling the frequency of the compressor in combination with the current use scene, so that the frequency control precision of the compressor is improved, the temperature control of the air conditioner is more accurate on the basis of combining the use scene of a user, and the user experience is also improved.
Those of ordinary skill in the art will understand that: all or a portion of the steps of implementing the above-described method embodiments may be performed by hardware associated with program instructions. The program may be stored in a computer-readable storage medium. When executed, the program performs steps comprising the method embodiments described above; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
Fig. 4 is a schematic structural diagram of a first embodiment of a frequency control device of an air conditioner compressor according to the present invention. As shown in fig. 4, the frequency control apparatus of the air conditioner compressor may include: an acquisition module 10, a first determination module 11 and a second determination module 12.
The acquiring module 10 is configured to acquire a first temperature difference change value of two adjacent time periods according to a first temperature difference in a current time period and a second temperature difference in a previous time period adjacent to the current time period;
the first determining module 11 is configured to determine a first frequency adjustment value of the compressor in a current time period according to the first temperature difference change value, the first temperature difference, and a preset first mapping relationship; the first mapping relation comprises mapping relations among different temperature difference change values, different temperature differences and different frequency adjustment values;
and a second determining module 12, configured to determine the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjustment value.
The frequency control device of the air conditioner compressor provided by the invention can execute the method embodiment, the realization principle and the technical effect are similar, and the details are not repeated.
Further, the second determining module 12 is specifically configured to determine the sum of the target frequency of the compressor in the last time period and the first frequency adjustment value as the target frequency of the compressor in the current time period.
Further, the obtaining module 10 is specifically configured to determine a difference value obtained by subtracting the second temperature difference from the first temperature difference as the first temperature difference change value.
Fig. 5 is a schematic structural diagram of a second embodiment of a frequency control device of an air conditioner compressor according to the present invention. On the basis of the above-mentioned embodiment shown in fig. 4, as shown in fig. 5, the frequency control device of the air conditioner compressor may further include a processing module 13.
The processing module 13 is configured to, when the set temperature of the air conditioner changes in the previous time period, re-determine a new first temperature difference change value and a new first temperature difference, determine a new first frequency adjustment value according to the new first temperature difference change value, the new first temperature difference, and the first mapping relationship, and determine a new target frequency of the compressor in the current time period according to the new first frequency adjustment value.
Optionally, the processing module 13 is further configured to determine that the target frequency of the compressor in the current time period is 0 when the operation mode of the air conditioner changes in the current time period; the compressor is instructed to operate at a preset initial frequency, and after the compressor operates at the preset initial frequency for a preset time period, the target frequency of the compressor in the current time period is determined again; wherein the operation modes include: at least one of a cooling mode, a heating mode, a defrost mode, an auto mode, a timed mode, and a protection mode.
Optionally, the processing module 13 is further configured to determine that the target frequency of the compressor in the current time period is equal to the maximum operating frequency when the target frequency of the compressor in the current time period is greater than the maximum operating frequency of the compressor, and instruct the compressor to adopt the maximum operating frequency when the compressor is actually operated;
or,
when the target frequency of the compressor in the current time period is less than the minimum operating frequency of the compressor, indicating the compressor to adopt the minimum operating frequency in actual operation;
or,
when the air conditioner works in a defrosting mode, indicating the compressor to adopt a preset defrosting operation frequency in actual operation;
or,
and when the air conditioner is in the protection mode, indicating the compressor to adopt a preset protection mode operation frequency in the actual operation, and after the protection mode is released, indicating the compressor to adopt the target frequency in the current time period in the actual operation.
The frequency control device of the air conditioner compressor provided by the invention can execute the method embodiment, the realization principle and the technical effect are similar, and the details are not repeated.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. A frequency control method of an air conditioner compressor is characterized by comprising the following steps:
obtaining a first temperature difference change value of two adjacent time periods according to a first temperature difference in the current time period and a second temperature difference in the last time period adjacent to the current time period;
determining a first frequency adjustment value of the compressor in the current time period according to the first temperature difference change value, the first temperature difference and a preset first mapping relation; the first mapping relation comprises mapping relations among different temperature difference change values, different temperature differences and different frequency adjustment values;
and determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjustment value.
2. The method according to claim 1, wherein the determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the previous time period and the first frequency adjustment value specifically comprises:
and adding the target frequency of the compressor in the last time period and the first frequency adjustment value to determine the target frequency of the compressor in the current time period.
3. The method according to claim 2, wherein obtaining the first temperature difference change value of two adjacent time periods according to the first temperature difference in the current time period and the second temperature difference in the previous time period adjacent to the current time period specifically comprises:
and subtracting the difference value of the second temperature difference from the first temperature difference to determine the first temperature difference change value.
4. The method of claim 3, further comprising:
if the set temperature of the air conditioner changes in the current time period, re-determining a new first temperature difference change value and a new first temperature difference, and determining a new first frequency adjustment value according to the new first temperature difference change value, the new first temperature difference and the first mapping relation;
and determining a new target frequency of the compressor in the current time period according to the new first frequency adjustment value.
5. The method of claim 3, further comprising:
if the operation mode of the air conditioner changes in the current time period, determining that the target frequency of the compressor in the current time period is 0;
the method comprises the steps of indicating the compressor to run by adopting a preset initial frequency, and re-determining the target frequency of the compressor in the current time period after the compressor runs for a preset time length by adopting the preset initial frequency; wherein the operation modes include: at least one of a cooling mode, a heating mode, a defrost mode, an auto mode, a timed mode, and a protection mode.
6. The method according to any one of claims 1-5, further comprising:
if the target frequency of the compressor in the current time period is greater than the maximum operation frequency of the compressor, determining that the target frequency of the compressor in the current time period is equal to the maximum operation frequency, and indicating that the compressor adopts the maximum operation frequency in actual operation;
or,
if the target frequency of the compressor in the current time period is less than the minimum running frequency of the compressor, indicating the compressor to adopt the minimum running frequency in actual running;
or,
if the air conditioner works in a defrosting mode, indicating that the compressor adopts a preset defrosting operation frequency in actual operation;
or,
and if the air conditioner is in the protection mode, indicating that the compressor adopts a preset protection mode operation frequency in the actual operation, and indicating that the compressor adopts the target frequency in the current time period in the actual operation after the protection mode is released.
7. A frequency control device of an air conditioner compressor, comprising:
the acquisition module is used for acquiring a first temperature difference change value of two adjacent time periods according to a first temperature difference in the current time period and a second temperature difference in the last time period adjacent to the current time period;
the first determining module is used for determining a first frequency adjusting value of the compressor in the current time period according to the first temperature difference change value, the first temperature difference and a preset first mapping relation; the first mapping relation comprises mapping relations among different temperature difference change values, different temperature differences and different frequency adjustment values;
and the second determining module is used for determining the target frequency of the compressor in the current time period according to the target frequency of the compressor in the last time period and the first frequency adjusting value.
8. The apparatus of claim 7, wherein the second determining module is specifically configured to determine the target frequency of the compressor in the current time period as a sum of the target frequency of the compressor in the previous time period and the first frequency adjustment value.
9. The apparatus of claim 8, wherein the obtaining module is specifically configured to determine a difference value obtained by subtracting the second temperature difference from the first temperature difference as the first temperature difference change value.
10. The apparatus of claim 8, further comprising:
and the processing module is used for re-determining a new first temperature difference change value and a new first temperature difference when the set temperature of the air conditioner changes in the previous time period, determining a new first frequency adjustment value according to the new first temperature difference change value, the new first temperature difference and the first mapping relation, and determining a new target frequency of the compressor in the current time period according to the new first frequency adjustment value.
CN201610555466.7A 2016-07-14 2016-07-14 Frequency control method and device for air conditioner compressor Active CN106196788B (en)

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