CN114992820A - Control method and device of compressor and unit - Google Patents

Control method and device of compressor and unit Download PDF

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Publication number
CN114992820A
CN114992820A CN202210703880.3A CN202210703880A CN114992820A CN 114992820 A CN114992820 A CN 114992820A CN 202210703880 A CN202210703880 A CN 202210703880A CN 114992820 A CN114992820 A CN 114992820A
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China
Prior art keywords
current value
compressor
frequency
value
upper limit
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Pending
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CN202210703880.3A
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Chinese (zh)
Inventor
植雄智
江标
张铭钊
梁万林
张奕强
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Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN202210703880.3A priority Critical patent/CN114992820A/en
Publication of CN114992820A publication Critical patent/CN114992820A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/24—Means for preventing or suppressing noise
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Abstract

The invention discloses a control method, a control device and a control unit of a compressor. The control method is applied to a unit, the unit comprises an internal fan and a compressor, and the control method comprises the following steps: acquiring an actual current value of the inner fan; adjusting the upper limit value of the frequency of the compressor according to the actual current value of the indoor unit fan; and controlling the compressor to operate according to the upper limit value of the compressor frequency. By the invention, the heat exchange effect requirement and the noise requirement can be considered.

Description

Control method and device of compressor and unit
Technical Field
The invention relates to the technical field of units, in particular to a control method and device of a compressor and a unit.
Background
The service environment of the unit (for example, the ducted air conditioner) is complicated various, and the air-out static pressure of the unit is also changeable, and if the air pressure of the service environment of the unit is not matched with the air-out static pressure of the unit, the air pressure needs to be adjusted.
For example, when the atmospheric pressure of service environment is lower than the air-out static pressure, the problem of too much wind noise can appear, the user generally reduces the fan gear of the indoor unit, and simultaneously, in order to avoid the problem of noise of the indoor unit caused by the compressor transmission, when the fan gear of the indoor unit is reduced, the frequency of the compressor can be adjusted downwards according to a fixed proportion, if the frequency of the compressor is adjusted downwards too much, the refrigerating or heating effect can be poor, if the frequency of the compressor is adjusted downwards too little, the problem of noise protrusion can appear due to too high transmission sound of the compressor.
Aiming at the problem that the unit in the prior art can not give consideration to the requirements of heat exchange effect and noise when adjusting the frequency of the compressor, an effective solution is not provided at present.
Disclosure of Invention
The embodiment of the invention provides a control method, a control device and a unit of a compressor, and aims to solve the problem that the unit in the prior art cannot give consideration to both the heat exchange effect requirement and the noise requirement when the frequency of the compressor is adjusted.
In order to solve the technical problem, the invention provides a control method of a compressor, which is applied to a unit, wherein the unit comprises an internal fan and the compressor, and the control method comprises the following steps:
acquiring an actual current value of the inner fan;
adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan;
and controlling the compressor to operate according to the upper limit value of the compressor frequency.
Further, adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan comprises:
judging whether the actual current value of the inner fan is equal to the rated current value of the inner fan;
if yes, controlling the upper limit value of the frequency of the compressor to be kept unchanged;
and if not, modifying the upper limit value of the frequency of the compressor according to the actual current value of the inner fan.
Further, modifying the upper limit value of the frequency of the compressor according to the actual current value of the inner fan, including:
determining a test current value closest to the actual current value of the inner fan;
modifying the upper limit value of the frequency of the compressor into the upper limit value of the frequency of the compressor corresponding to the test current value; wherein, the corresponding relation between the test current value and the upper limit value of the compressor frequency is preset.
Further, before adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan, the method further comprises:
controlling the inner fan to operate under different test current values respectively, and adjusting the frequency of the compressor to adjust the noise of the unit;
and determining the maximum frequency which can be reached by the compressor under the condition that the noise of the unit meets the noise requirement under each test current value, taking the maximum frequency as the upper limit value of the frequency of the compressor corresponding to the test current value, and further determining the corresponding relation between the test current value and the upper limit value of the frequency of the compressor.
Further, determining a test current value closest to the actual current value of the inner blower includes:
determining a first test current value which is larger than the actual current value of the inner fan and is closest to the actual current value of the inner fan; determining a second test current value which is smaller than the actual current value of the inner fan and is closest to the actual current value of the inner fan;
calculating a first difference value between the actual current value of the inner fan and the first test current value and a second difference value between the actual current value of the inner fan and the second test current value;
comparing the magnitude relationship between the absolute value of the first difference and the absolute value of the second difference;
if the absolute value of the first difference is smaller than or equal to the absolute value of the second difference, determining that the first test current value is the test current value closest to the actual current value of the inner fan;
and if the absolute value of the first difference is larger than the absolute value of the second difference, determining the second test current value as the test current value closest to the actual current value of the inner fan.
Further, controlling the operation of the compressor according to the upper limit value of the compressor frequency comprises:
judging whether a frequency limiting instruction or a frequency reducing instruction is received;
if so, adjusting the frequency of the compressor according to the frequency limiting instruction or the frequency reducing instruction;
and if not, controlling the compressor to operate according to the upper limit value of the compressor frequency.
The invention also provides a control device of the compressor, which is applied to a machine set, wherein the machine set comprises an internal machine fan and the compressor, and the control device comprises:
the current acquisition module is used for acquiring the actual current value of the inner fan;
the adjusting module is used for adjusting the upper limit value of the frequency of the compressor according to the actual current value of the indoor unit fan;
and the control module is used for controlling the compressor to operate according to the upper limit value of the frequency of the compressor.
The invention also provides a machine set, which comprises an internal machine fan, a compressor and the control device.
Further, the unit is a variable frequency air conditioning unit.
The present invention also provides a computer-readable storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described control method.
By applying the technical scheme of the invention, the upper limit value of the frequency of the compressor is adjusted according to the actual current value of the inner fan; and controlling the compressor to operate according to the upper limit value of the compressor frequency. Adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan; and controlling the compressor to operate according to the upper limit value of the compressor frequency. The actual current value of the inner fan can reflect the wind gear of the inner fan, the upper limit value of the frequency of the compressor matched with the actual current value of the inner fan is determined according to the actual current value of the inner fan, the upper limit value of the frequency of the compressor can be matched with the wind gear of the inner fan, and therefore when the unit operates under each wind gear, the frequency of the compressor is guaranteed to reach the maximum value, and the heat exchange effect requirement and the noise requirement are met.
Drawings
FIG. 1 is a block diagram of an assembly to which the present invention is applied;
fig. 2 is a flowchart of a control method of a compressor according to an embodiment of the present invention;
fig. 3 is a flowchart of a control method of a compressor according to another embodiment of the present invention;
fig. 4 is a block diagram of a control device 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 present invention will be described in further detail with reference to the accompanying drawings. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to 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, and "a plurality" typically includes at least two.
It should be understood that the term "and/or" as used herein is merely one type of association that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should be understood that although the terms first, second, etc. may be used to describe the test current values in embodiments of the present invention, these test current values should not be limited to these terms. These terms are only used to distinguish between different test current values. For example, the first test current value may also be referred to as a second test current value, and similarly, the second test current value may also be referred to as a first test current value without departing from the scope of embodiments of the present invention.
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 an article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such article or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional like elements in the article or device in which the element is contained.
Alternative embodiments of the present invention are described in detail below with reference to the accompanying drawings.
Example 1
The present embodiment provides a control method for a compressor, which is applied to a unit, and fig. 1 is a structural diagram of a unit to which the present invention is applied, and as shown in fig. 1, the unit includes: the air conditioner comprises a main board 1, an internal fan 2, an evaporator 3 and an air duct 4, wherein the internal fan comprises a motor and fan blades; outer quick-witted fan 5 also contains motor and fan blade, condenser 6, compressor 8, still includes: and a control device 7 for implementing the control method of the present embodiment.
Fig. 2 is a flowchart of a control method of a compressor according to an embodiment of the present invention, as shown in fig. 2, the control method including:
and S101, acquiring an actual current value of the inner fan.
The actual current value of the inner fan refers to the current actually input by the motor in the inner fan, and the actual current value of the inner fan can be detected through a current sensor, a Hall element and the like during specific implementation.
And S102, adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan.
And S103, controlling the compressor to operate according to the upper limit value of the frequency of the compressor.
According to the control method of the compressor, the upper limit value of the frequency of the compressor is adjusted according to the actual current value of the inner fan; and controlling the compressor to operate according to the upper limit value of the compressor frequency. Adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan; and controlling the compressor to operate according to the upper limit value of the compressor frequency. The actual current value of the inner fan can reflect the wind gear of the inner fan, the upper limit value of the compressor frequency matched with the actual current value of the inner fan is determined according to the actual current value of the inner fan, and the upper limit value of the compressor frequency can be matched with the wind gear of the inner fan, so that when the unit operates under each wind gear, the frequency of the compressor can be guaranteed to reach the maximum value on the premise of meeting the noise requirement, and the heat exchange effect requirement and the noise requirement are met.
When the specific implementation, if the air-out static pressure of the unit is the rated static pressure, that is, the actual current value of the internal fan is equal to the rated current value of the internal fan, then the gear of the fan does not need to be adjusted, and the upper limit value of the compressor frequency does not need to be adjusted naturally, and then the compressor frequency is adjusted (after the upper limit value of the compressor frequency is increased, the actual operation frequency of the compressor also can be increased), only when the air-out static pressure of the unit is not the rated static pressure, that is, the actual current value of the internal fan is not equal to the rated current value of the internal fan, the upper limit value of the compressor frequency needs to be adjusted, therefore, the upper limit value of the compressor frequency is adjusted according to the actual current value of the internal fan, including: judging whether the actual current value of the inner fan is equal to the rated current value of the inner fan; if yes, controlling the upper limit value of the frequency of the compressor to be kept unchanged; and if not, modifying the upper limit value of the frequency of the compressor according to the actual current value of the inner fan.
In the mainboard of the unit, the corresponding relation table between the testing current value obtained by the pre-testing and the upper limit value of the compressor frequency is stored, and under the condition that the difference value delta I between the actual current value of the internal fan and the testing current value is more than or equal to 0, the corresponding relation between the testing current value and the upper limit value of the compressor frequency is as shown in the following table 1:
TABLE 1 table of correspondence between test current value and compressor frequency upper limit value (Δ I ≧ 0)
Figure BDA0003705457670000061
In Table 1, the test current gradually increases from I1 to In, and the upper limit of the compressor frequency gradually increases from Hz1 to Hzn.
When the difference Δ I between the actual current value of the internal fan and the test current value is smaller than 0, the corresponding relationship between the test current value and the upper limit value of the compressor frequency is as shown in the following table 2:
TABLE 2 table of correspondence between test current value and compressor frequency upper limit value (Δ I < 0)
Figure BDA0003705457670000062
In table 2, the test current gradually decreases from In to I1, and the upper limit of the compressor frequency gradually decreases from Hzn to Hz 1.
Because it is impossible to cover all current values during testing, only a limited number of current values can be tested, and there may be a test current value equal to the actual current value of the current internal fan in the corresponding relation table, or there may not be a test current value, therefore, the upper limit value of the compressor frequency is modified according to the actual current value of the internal fan, including: determining a test current value closest to the actual current value of the inner fan; modifying the upper limit value of the frequency of the compressor into the upper limit value of the frequency of the compressor corresponding to the test current value; wherein, the corresponding relation between the test current value and the upper limit value of the compressor frequency is preset.
In order to ensure that the noise requirement is met simultaneously and the change of the heat exchange amount is reduced as much as possible, before the upper limit value of the frequency of the compressor is adjusted according to the actual current value of the inner fan, the method further comprises the following steps: controlling the inner fan to operate under different test current values respectively, and adjusting the frequency of the compressor to adjust the noise of the unit; and determining the maximum frequency which can be reached by the compressor under the condition that the noise of the unit meets the noise requirement under each test current value, and taking the maximum frequency as the upper limit value of the frequency of the compressor corresponding to the test current value, thereby determining the corresponding relation between the test current value and the upper limit value of the frequency of the compressor.
In order to accurately determine a test current value closest to an actual current value of an inner fan, the method for determining the test current value closest to the actual current value of the inner fan comprises the following steps: determining a first test current value which is larger than the actual current value of the inner fan and is closest to the actual current value of the inner fan; determining a second test current value which is smaller than the actual current value of the inner fan and is closest to the actual current value of the inner fan; calculating a first difference value between the actual current value of the inner fan and the first test current value and a second difference value between the actual current value of the inner fan and the second test current value; comparing the magnitude relationship between the absolute value of the first difference and the absolute value of the second difference; if the absolute value of the first difference is smaller than or equal to the absolute value of the second difference, the first test current value is closer to the actual current value of the inner fan, and the first test current value is determined to be the test current value closest to the actual current value of the inner fan; and if the absolute value of the first difference is larger than the absolute value of the second difference, indicating that a second test current value is closer to the actual current value of the inner fan, determining that the second test current value is the test current value closest to the actual current value of the inner fan.
Generally, under the control of the unit internal control logic, the upper limit value of the compressor frequency is increased, and the operating frequency of the compressor is increased, but if a frequency limiting instruction or a frequency reducing instruction is received, the operation of the compressor is preferentially controlled according to the frequency limiting instruction or the frequency reducing instruction, so that the operation of the compressor is controlled according to the upper limit value of the compressor frequency, including: judging whether a frequency limiting instruction or a frequency reducing instruction is received; if so, adjusting the frequency of the compressor according to the frequency limiting instruction or the frequency reducing instruction; and if not, controlling the compressor to operate according to the upper limit value of the compressor frequency.
The following description is made in conjunction with a specific example. Fig. 3 is a flowchart of a control method of a compressor according to another embodiment of the present invention, as shown in fig. 3, the method including:
and S1, after the wind gear of the internal engine is changed, adjusting the frequency of the compressor.
S2, obtaining the rated current value I of the inner fan Rated value And detecting the actual current value I of the inner fan.
S3, judgment of I-I Rated value If yes, step S4 is executed, and if no, step S5 is executed.
And S4, controlling the upper limit value of the compressor frequency to be kept unchanged.
S5, judgment of I-I Rated value If > 0 is true, if yes, step S6 is executed, if no, step S10 is executed.
S6, calculating and determining a test current value In +1 which is larger than the actual current value I of the inner fan and is closest to the actual current value of the inner fan; and determining a test current value In which the current value is less than the actual current value I of the inner fan and is closest to the actual current value of the inner fan, calculating a first difference value delta I1 between the actual current value I of the inner fan and the test current value In +1 by using a formula delta I1-I +1, and calculating a second difference value delta I2 between the actual current value I of the inner fan and the test current value In by using a formula delta I2-I-In.
S7, judging whether the result is that the < I < delta > I1 </I > - < delta > I2 is not less than 0, if so, executing step S8, otherwise, executing step S9.
And S8, selecting the upper limit value of the compressor frequency corresponding to the test current value In as the frequency reference of the compressor operation.
And S9, selecting the upper limit value of the compressor frequency corresponding to the test current value In +1 as the frequency reference of the compressor operation.
S10, calculating and determining a test current value In which is smaller than the actual current value I of the inner fan and is closest to the actual current value of the inner fan; and determining a test current value In-1 which is greater than or equal to the actual current value I of the inner fan and is closest to the actual current value of the inner fan, calculating a first difference value Δ I1 between the actual current value I of the inner fan and the test current value In by using a formula Δ I1 ═ I-In, and calculating a second difference value Δ I2 between the actual current value I of the inner fan and the second test current value In by using a formula Δ I2 ═ I-1.
S11, judging whether Δ I1- | Δ I2| ≧ 0, if yes, executing step S12, and if no, executing step S13.
S12, selecting the upper limit value of the compressor frequency corresponding to the test current value In-1 as the frequency reference of the compressor operation.
And S13, selecting the upper limit value of the compressor frequency corresponding to the test current value In as the frequency reference of the compressor operation.
According to the embodiment, the frequency of the air conditioner compressor is automatically adjusted under different static pressure using environments according to the corresponding relation between the current value of the inner fan and the upper limit value of the compressor operating frequency, so that the purposes of optimizing the refrigeration/heat effect and improving the compressor transmission sound problem are achieved.
Example 2
The present embodiment provides a control device for a compressor, which is applied to a machine set, as shown in fig. 1, the machine set includes: the air conditioner comprises a main board 1, an internal fan 2, an evaporator 3 and an air duct 4, wherein the internal fan comprises a motor and fan blades; outer quick-witted fan 5 also contains motor and fan blade, condenser 6, and compressor 8 still includes: and a control device 7 for implementing the control method of the present embodiment.
Fig. 4 is a block diagram of a control device according to an embodiment of the present invention, and as shown in fig. 4, the control device 7 includes:
and the current obtaining module 71 is connected with the inner fan and used for obtaining the actual current value of the inner fan.
The adjusting module 72 is used for adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan;
and the control module 73 is connected with the compressor and used for controlling the compressor to operate according to the upper limit value of the frequency of the compressor.
The control device of this embodiment adjusts the upper limit value of the compressor frequency according to the actual current value of the internal blower by the adjusting module 72; and controlling the compressor to operate according to the upper limit value of the compressor frequency through a control module 73. The actual current value of the inner fan can reflect the wind gear of the inner fan, the upper limit value of the frequency of the compressor matched with the actual current value of the inner fan is determined according to the actual current value of the inner fan, the upper limit value of the frequency of the compressor can be matched with the wind gear of the inner fan, and therefore when the unit operates under each wind gear, the frequency of the compressor is guaranteed to reach the maximum value, and the heat exchange effect requirement and the noise requirement are met.
When the air conditioner is specifically implemented, if the outlet static pressure of the unit is the rated static pressure, that is, the actual current value of the internal fan is equal to the rated current value of the internal fan, the gear of the fan does not need to be adjusted, and thus the upper limit value of the frequency of the compressor does not need to be adjusted naturally, and then the frequency of the compressor is adjusted (after the upper limit value of the frequency of the compressor is increased in general), only when the outlet static pressure of the unit is not the rated static pressure, that is, the actual current value of the internal fan is not equal to the rated current value of the internal fan, the upper limit value of the frequency of the compressor needs to be adjusted, and therefore, the adjusting module 72 is specifically configured to: judging whether the actual current value of the inner fan is equal to the rated current value of the inner fan; if yes, controlling the upper limit value of the frequency of the compressor to be kept unchanged; and if not, modifying the upper limit value of the frequency of the compressor according to the actual current value of the inner fan.
Because during the test, it is impossible to cover all current values, only a limited number of current values can be tested, and a corresponding relation table may have a test current value equal to the actual current value of the current internal blower, or may not have the test current value, the adjusting module 72 is further specifically configured to: determining a test current value closest to the actual current value of the inner fan; modifying the upper limit value of the frequency of the compressor into the upper limit value of the frequency of the compressor corresponding to the test current value; wherein, the corresponding relation between the test current value and the upper limit value of the compressor frequency is preset.
In order to ensure that the noise requirements are met at the same time and to reduce as much as possible the variation in the amount of heat exchange, the adjustment module 72 is also arranged to: before adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan, the inner fan is controlled to operate under different test current values, and the frequency of the compressor is adjusted to adjust the noise of the unit; and determining the maximum frequency which can be reached by the compressor under the condition that the noise of the unit meets the noise requirement under each test current value, taking the maximum frequency as the upper limit value of the frequency of the compressor corresponding to the test current value, and further determining the corresponding relation between the test current value and the upper limit value of the frequency of the compressor.
In order to accurately determine a test current value closest to an actual current value of an inner fan, the determining of the test current value closest to the actual current value of the inner fan comprises the following steps: determining a first test current value which is larger than the actual current value of the inner fan and is closest to the actual current value of the inner fan; determining a second test current value which is smaller than the actual current value of the inner fan and is closest to the actual current value of the inner fan; calculating a first difference value between the actual current value of the inner fan and the first test current value and a second difference value between the actual current value of the inner fan and the second test current value; comparing the magnitude relationship between the absolute value of the first difference and the absolute value of the second difference; if the absolute value of the first difference is smaller than or equal to the absolute value of the second difference, the first test current value is closer to the actual current value of the inner fan, and the first test current value is determined to be the test current value closest to the actual current value of the inner fan; and if the absolute value of the first difference is larger than the absolute value of the second difference, indicating that a second test current value is closer to the actual current value of the inner fan, determining that the second test current value is the test current value closest to the actual current value of the inner fan.
Generally, under the control of the unit internal control logic, the upper limit value of the compressor frequency is increased, and the operating frequency of the compressor is also increased, but if a frequency limiting instruction or a frequency reducing instruction is received, the compressor is preferentially controlled to operate according to the frequency limiting instruction or the frequency reducing instruction, so the control module 73 is specifically configured to: judging whether a frequency limiting instruction or a frequency reducing instruction is received; if so, adjusting the frequency of the compressor according to the frequency limiting instruction or the frequency reducing instruction; and if not, controlling the compressor to operate according to the upper limit value of the compressor frequency.
Example 3
The embodiment provides a unit, which comprises an internal fan, a compressor and a control device in the embodiment. In one embodiment of the invention, the unit is a variable frequency air conditioner unit.
Example 4
The present embodiment provides a computer-readable storage medium on which a computer program is stored, which when executed by a processor implements the control method in the above-described embodiments.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims (10)

1. A control method of a compressor is applied to a unit, the unit comprises an internal fan and the compressor, and the control method is characterized by comprising the following steps:
acquiring an actual current value of the inner fan;
adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan;
and controlling the compressor to operate according to the upper limit value of the compressor frequency.
2. The method according to claim 1, wherein adjusting the compressor frequency upper limit value according to the actual current value of the inner blower comprises:
judging whether the actual current value of the inner fan is equal to the rated current value of the inner fan;
if yes, controlling the upper limit value of the frequency of the compressor to be kept unchanged;
and if not, modifying the upper limit value of the frequency of the compressor according to the actual current value of the inner fan.
3. The method of claim 2, wherein modifying the compressor frequency upper limit value based on the actual current value of the inner blower comprises:
determining a test current value closest to the actual current value of the inner fan;
modifying the upper limit value of the frequency of the compressor into the upper limit value of the frequency of the compressor corresponding to the test current value; wherein, the corresponding relation between the test current value and the upper limit value of the compressor frequency is preset.
4. The method according to claim 1, wherein before adjusting the compressor frequency upper limit value according to the actual current value of the inner blower, the method further comprises:
controlling the inner fan to operate under different test current values respectively, and adjusting the frequency of the compressor to adjust the noise of the unit;
and determining the maximum frequency which can be reached by the compressor under the condition that the noise of the unit meets the noise requirement under each test current value, taking the maximum frequency as the upper limit value of the frequency of the compressor corresponding to the test current value, and further determining the corresponding relation between the test current value and the upper limit value of the frequency of the compressor.
5. The method of claim 3, wherein determining the test current value that is closest to the actual current value of the inner blower comprises:
determining a first test current value which is larger than the actual current value of the inner fan and is closest to the actual current value of the inner fan; determining a second test current value which is smaller than the actual current value of the inner fan and is closest to the actual current value of the inner fan;
calculating a first difference value between the actual current value of the inner fan and the first test current value and a second difference value between the actual current value of the inner fan and the second test current value;
comparing the magnitude relationship between the absolute value of the first difference and the absolute value of the second difference;
if the absolute value of the first difference is smaller than or equal to the absolute value of the second difference, determining that the first test current value is the test current value closest to the actual current value of the inner fan;
and if the absolute value of the first difference is larger than the absolute value of the second difference, determining the second test current value as the test current value closest to the actual current value of the inner fan.
6. The method of claim 1, wherein controlling the compressor operation based on the compressor frequency upper limit value comprises:
judging whether a frequency limiting instruction or a frequency reducing instruction is received;
if so, adjusting the frequency of the compressor according to the frequency limiting instruction or the frequency reducing instruction;
and if not, controlling the compressor to operate according to the upper limit value of the compressor frequency.
7. The utility model provides a controlling means of compressor, is applied to the unit, the unit includes interior machine fan and compressor, its characterized in that, controlling means includes:
the current acquisition module is used for acquiring the actual current value of the inner fan;
the adjusting module is used for adjusting the upper limit value of the frequency of the compressor according to the actual current value of the inner fan;
and the control module is used for controlling the compressor to operate according to the upper limit value of the frequency of the compressor.
8. A unit comprising an inner machine blower and a compressor, characterized by further comprising a control device according to claim 7.
9. The unit according to claim 8, characterized in that it is a variable frequency air conditioning unit.
10. A computer-readable storage medium on which a computer program is stored, the program, when being executed by a processor, implementing the control method according to any one of claims 1 to 6.
CN202210703880.3A 2022-06-21 2022-06-21 Control method and device of compressor and unit Pending CN114992820A (en)

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CN202210703880.3A CN114992820A (en) 2022-06-21 2022-06-21 Control method and device of compressor and unit

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0735391A (en) * 1993-07-20 1995-02-07 Fujitsu General Ltd Control device for air conditioner
CN104314796A (en) * 2014-10-21 2015-01-28 芜湖美智空调设备有限公司 Compressor frequency controlling method, compressor frequency controlling device and air conditioner
CN105928149A (en) * 2016-05-06 2016-09-07 广东美的暖通设备有限公司 Wind speed frequency limiting control method and system for direct current variable frequency air conditioner indoor unit and air conditioner
CN111023460A (en) * 2019-12-31 2020-04-17 宁波奥克斯电气股份有限公司 Air conditioner control method and device, air conditioner and storage medium
JP2021124228A (en) * 2020-02-03 2021-08-30 ダイキン工業株式会社 Refrigeration cycle device

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0735391A (en) * 1993-07-20 1995-02-07 Fujitsu General Ltd Control device for air conditioner
CN104314796A (en) * 2014-10-21 2015-01-28 芜湖美智空调设备有限公司 Compressor frequency controlling method, compressor frequency controlling device and air conditioner
CN105928149A (en) * 2016-05-06 2016-09-07 广东美的暖通设备有限公司 Wind speed frequency limiting control method and system for direct current variable frequency air conditioner indoor unit and air conditioner
CN111023460A (en) * 2019-12-31 2020-04-17 宁波奥克斯电气股份有限公司 Air conditioner control method and device, air conditioner and storage medium
JP2021124228A (en) * 2020-02-03 2021-08-30 ダイキン工業株式会社 Refrigeration cycle device

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Application publication date: 20220902