CN117345681B - Control method of variable frequency fan, variable frequency air conditioner, storage medium and electronic device - Google Patents
Control method of variable frequency fan, variable frequency air conditioner, storage medium and electronic device Download PDFInfo
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- CN117345681B CN117345681B CN202311646752.0A CN202311646752A CN117345681B CN 117345681 B CN117345681 B CN 117345681B CN 202311646752 A CN202311646752 A CN 202311646752A CN 117345681 B CN117345681 B CN 117345681B
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- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000001276 controlling effect Effects 0.000 description 13
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- 238000005057 refrigeration Methods 0.000 description 7
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/004—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids by varying driving speed
Abstract
The invention provides a control method of a variable frequency fan, a variable frequency air conditioner, a storage medium and an electronic device, wherein the method comprises the following steps: acquiring real-time operation parameters of a variable frequency fan, wherein the variable frequency fan is formed by sequentially arranging a plurality of fans; calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters; determining the frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase; and if the variable frequency fans meet the independent adjustment condition, carrying out independent frequency modulation on the single fan in the variable frequency fans according to the frequency modulation type. By the scheme of the embodiment, the technical problem of operation fluctuation caused by integral frequency modulation of the fan under the low-load small-air-volume demand in the related technology is solved, and efficient and stable operation of the variable-frequency fan is ensured.
Description
Technical Field
The invention relates to the technical field of fan control, in particular to a control method of a variable frequency fan, a variable frequency air conditioner, a storage medium and an electronic device.
Background
In the existing air-cooled chiller, the variable frequency fans are generally integrally controlled in a group mode, but under the condition of low-load small-air-volume demand, the situation that the integral frequency of the fans is inconsistent with the demand of the whole machine and the energy efficiency is reduced can occur.
In the related art, the air quantity is regulated by using the air inlet temperature and the air return temperature, or the fan is selectively started or stopped according to the pressure ratio, but the technical problems that the high pressure and the low pressure of the unit are fluctuated along with the overall frequency-increasing and frequency-decreasing of the fan under the condition of low load and small air quantity, and the running state of the unit is unstable and even standby can not be solved.
In view of the above problems in the related art, an efficient and accurate solution has not been found.
Disclosure of Invention
The invention provides a control method of a variable frequency fan, a variable frequency air conditioner, a storage medium and an electronic device, and aims to solve the technical problem that operation fluctuation is caused by integral frequency modulation of the fan in the related art.
According to an embodiment of the present invention, there is provided a control method of a variable frequency fan, including: acquiring real-time operation parameters of the variable frequency fans, wherein the variable frequency fans are formed by sequentially arranging a plurality of fans; calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters; determining a frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase; and if the variable frequency fans meet the independent adjustment condition, carrying out independent frequency modulation on the single fan in the variable frequency fans according to the frequency modulation type.
Optionally, determining whether the variable frequency fan meets the condition of independent adjustment according to the real-time operation parameter includes: judging whether the real-time environment temperature is greater than or equal to a temperature threshold, judging whether the real-time operation load is greater than or equal to a load threshold, and judging whether the real-time frequency is greater than or equal to a frequency threshold, wherein the real-time operation parameters comprise the real-time environment temperature, the real-time frequency and the real-time operation load of the variable-frequency fan; if the ambient temperature is less than the temperature threshold, the running load is less than the load threshold, and the real-time frequency is less than the frequency threshold, judging that the variable frequency fan meets the condition of independent adjustment; and if the ambient temperature is greater than or equal to a temperature threshold, or the running load is greater than or equal to a load threshold, or the real-time frequency is greater than or equal to a frequency threshold, judging that the variable frequency fan does not meet the condition of independent adjustment.
Optionally, determining the frequency modulation type of the variable frequency fan according to the internal and external temperature difference includes: judging whether the internal and external temperature difference is smaller than a first temperature difference threshold value or not, and judging whether the internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not, wherein the second temperature difference threshold value is larger than the first temperature difference threshold value; if the internal-external temperature difference is smaller than a first temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency reduction; and if the internal and external temperature difference is greater than or equal to a second temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency-up.
Optionally, performing independent frequency modulation on a single fan in the variable frequency fans according to the frequency modulation type includes: in the independent frequency modulation period, the following steps are adopted to carry out frequency reduction on a single fan until the current internal and external temperature difference of the variable frequency fan is greater than or equal to a first temperature difference threshold value or the frequencies of all fans are 0: and selecting a target fan from the fans according to a preset sequence, if the current internal and external temperature difference is smaller than the first temperature difference threshold, performing frequency reduction on the target fan based on a first step length, detecting the current internal and external temperature difference of the variable frequency fan, judging whether the current internal and external temperature difference is smaller than the first temperature difference threshold, and if the current internal and external temperature difference is smaller than the first temperature difference threshold, selecting the next target fan from the fans according to the preset sequence until the internal and external temperature difference is larger than or equal to the first temperature difference threshold.
Optionally, the method further comprises: judging whether the fan frequencies of all fans of the variable-frequency fan are 0; and if the fan frequencies of all fans of the variable frequency fans are 0, closing the variable frequency fans.
Optionally, performing independent frequency modulation on a single fan in the variable frequency fans according to the frequency modulation type includes: obtaining the highest operation frequency of all fans of the variable frequency fan and the real-time operation load of the variable frequency fan at the current time, wherein the real-time operation parameters comprise the highest operation frequency; controlling all fans to raise the frequency to the highest operating frequency, and obtaining the current internal and external temperature difference of the variable frequency fans; judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not; and if the current internal and external temperature difference is greater than or equal to the second temperature difference threshold value, independently raising the frequency of a single fan in the variable frequency fans.
Optionally, performing independent frequency up-conversion on a single fan of the variable frequency fans includes: in the independent frequency modulation period, the following steps are adopted to carry out frequency up-conversion on a single fan until the current temperature difference between the inside and the outside of the variable frequency fan is smaller than the second temperature difference threshold value or the real-time operation load of the variable frequency fan is larger than or equal to the load threshold value: selecting a target fan from the fans according to a preset sequence, raising the frequency of the target fan based on a second step length, detecting the current internal and external temperature difference of the variable frequency fan, judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value, and selecting the next target fan from the fans according to the preset sequence if the current internal and external temperature difference is larger than or equal to the second temperature difference threshold value.
According to another embodiment of the present invention, there is provided a variable frequency air conditioner including: the acquisition module is used for acquiring real-time operation parameters of the variable frequency fans, wherein the variable frequency fans are formed by arranging a plurality of fans in sequence; the judging module is used for calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters; the determining module is used for determining the frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase; and the adjusting module is used for independently adjusting the frequency of a single fan in the variable frequency fan according to the frequency modulation type if the variable frequency fan meets the independent adjustment condition.
Optionally, the judging module includes: the judging unit is used for judging whether the real-time environment temperature is greater than or equal to a temperature threshold value, judging whether the real-time operation load is greater than or equal to a load threshold value and judging whether the real-time frequency is greater than or equal to a frequency threshold value, wherein the real-time operation parameters comprise the real-time environment temperature, the real-time frequency and the real-time operation load of the variable-frequency fan; the confirmation unit is used for judging that the variable frequency fan meets the condition of independent adjustment if the ambient temperature is smaller than the temperature threshold value, the running load is smaller than the load threshold value, and the real-time frequency is smaller than the frequency threshold value; and if the ambient temperature is greater than or equal to a temperature threshold, or the running load is greater than or equal to a load threshold, or the real-time frequency is greater than or equal to a frequency threshold, judging that the variable frequency fan does not meet the condition of independent adjustment.
Optionally, the determining module includes: the judging unit is used for judging whether the internal and external temperature difference is smaller than a first temperature difference threshold value or not and judging whether the internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not, wherein the second temperature difference threshold value is larger than the first temperature difference threshold value; the determining unit is used for determining that the frequency modulation type of the variable frequency fan is frequency reduction if the internal and external temperature difference is smaller than a first temperature difference threshold value; and if the internal and external temperature difference is greater than or equal to a second temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency-up.
Optionally, the adjustment module includes: the first selecting unit is used for selecting one target fan from the fans according to a preset sequence; the frequency reducing unit is used for reducing the frequency of the target fan based on a first step length if the current internal and external temperature difference is smaller than the first temperature difference threshold value; the detection unit is used for detecting the current internal and external temperature difference of the variable frequency fan; the judging unit is used for judging whether the current internal and external temperature difference is smaller than the first temperature difference threshold value, and the selecting unit is used for selecting the next target fan from the fans according to a preset sequence until the internal and external temperature difference is larger than or equal to the first temperature difference threshold value if the current internal and external temperature difference is smaller than the first temperature difference threshold value.
Optionally, the adjusting module further comprises: the judging unit is used for judging whether the fan frequencies of all fans of the variable-frequency fan are 0; and the closing unit is used for closing the variable frequency fans if the fan frequencies of all fans of the variable frequency fans are 0.
Optionally, the adjusting module further comprises: the acquisition unit is used for acquiring the highest running frequency of all fans of the variable-frequency fan and the real-time running load of the variable-frequency fan at the current time, wherein the real-time running parameters comprise the highest running frequency; the control unit is used for controlling all fans to be increased to the highest operating frequency and obtaining the current internal and external temperature difference of the variable-frequency fans; the judging unit is used for judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value; and the control unit is used for carrying out independent frequency raising on a single fan in the variable frequency fan if the current internal and external temperature difference is greater than or equal to the second temperature difference threshold value.
Optionally, the control unit includes: the first selecting subunit is used for selecting one target fan from the fans according to a preset sequence; the frequency-raising subunit is used for frequency-raising the target fan based on a second step length; the detection subunit is used for detecting the current internal and external temperature difference of the variable frequency fan; the judging subunit is used for judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value; and the second judging subunit is used for selecting a next target fan from the fans according to a preset sequence if the current internal and external temperature difference is greater than or equal to a second temperature difference threshold value.
According to a further embodiment of the invention, there is also provided a storage medium having stored therein a computer program, wherein the computer program is arranged to perform the steps of any of the apparatus embodiments described above when run.
According to a further embodiment of the invention there is also provided an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the device embodiments described above.
According to the embodiment of the invention, the real-time operation parameters of the variable frequency fan are obtained, wherein the variable frequency fan is formed by sequentially arranging a plurality of fans; calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters; determining a frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase; if the variable frequency fans meet the condition of independent adjustment, the single fans in the variable frequency fans are subjected to independent frequency modulation according to the frequency modulation type, the independent adjustment condition is met by controlling the variable frequency fans, the independent frequency modulation is performed on the single fans in a targeted manner under the condition that the variable frequency fans meet the condition, and when the internal and external temperature difference of the variable frequency fans meet the frequency modulation condition, the independent frequency modulation is performed on the single fans in the variable frequency fans, so that the technical problem of operation fluctuation caused by integral frequency modulation of the fans in the related art is solved, and efficient and stable operation of the variable frequency fans is ensured.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiments of the invention and together with the description serve to explain the invention and do not constitute a limitation on the invention. In the drawings:
fig. 1 is a hardware block diagram of a variable frequency air conditioner according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method of controlling a variable frequency fan according to an embodiment of the present invention;
FIG. 3 is a system block diagram of variable frequency fan operation according to an embodiment of the present invention;
FIG. 4 is a fan layout of a variable frequency fan according to an embodiment of the present invention;
FIG. 5 is an overall flow chart of a method of controlling the frequency down of a variable frequency fan according to an embodiment of the present invention;
FIG. 6 is an overall flowchart of a method of controlling the boost of a variable frequency fan according to an embodiment of the present invention;
fig. 7 is a block diagram of a variable frequency air conditioner according to an embodiment of the present invention.
Detailed Description
In order that those skilled in the art will better understand the present application, a technical solution in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application, and it is apparent that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art based on the embodiments herein without making any inventive effort, shall fall within the scope of the present application. It should be noted that, in the case of no conflict, the embodiments and features in the embodiments may be combined with each other.
It should be noted that the terms "first," "second," and the like in the description and claims of the present application and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be implemented in sequences other than those illustrated or otherwise described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Example 1
The method embodiment provided in the first embodiment of the present application may be performed in a variable frequency air conditioner, a variable frequency refrigerator, a refrigeration cycle system, or a similar computing device. Taking the operation on the variable frequency air conditioner as an example, fig. 1 is a hardware structure block diagram of the variable frequency air conditioner according to an embodiment of the present invention. As shown in fig. 1, the variable frequency air conditioner may include one or more (only one is shown in fig. 1) processors 102 (the processors 102 may include, but are not limited to, a microprocessor MCU, a programmable logic device FPGA, or the like) and a memory 104 for storing data, and optionally, a transmission device 106 for communication functions and an input-output device 108. It will be appreciated by those skilled in the art that the structure shown in fig. 1 is merely illustrative, and the structure of the inverter air conditioner is not limited thereto. For example, the inverter air conditioner may further include more or less components than those shown in fig. 1, or have a different configuration from that shown in fig. 1.
The memory 104 may be used to store a variable frequency air conditioning program, for example, a software program of application software and a module, such as a variable frequency air conditioning program corresponding to a control method of a variable frequency fan in an embodiment of the present invention, and the processor 102 executes the variable frequency air conditioning program stored in the memory 104, thereby performing various functional applications and data processing, that is, implementing the above-mentioned method. Memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include memory remotely located with respect to the processor 102, which may be connected to the variable frequency air conditioner via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The transmission device 106 is used to receive or transmit data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the variable frequency air conditioner. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, simply referred to as NIC) that can connect to other network devices through a base station to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is configured to communicate with the internet wirelessly.
In this embodiment, a control method of a variable frequency fan is provided, fig. 2 is a flowchart of a control method of a variable frequency fan according to an embodiment of the present invention, and as shown in fig. 2, the flowchart includes the following steps:
step S202, acquiring real-time operation parameters of the variable frequency fans, wherein the variable frequency fans are formed by sequentially arranging a plurality of fans;
FIG. 3 is a system structure diagram of the operation of a variable frequency fan according to an embodiment of the present invention, as shown in FIG. 3, the system includes a compressor 1, a condensing heat exchanger 2 (fan), a throttling device 3, and an evaporating heat exchanger 4, wherein the condensing heat exchanger is the variable frequency fan of the present invention; in the steam cycle, the condensing heat exchanger cools the gas or vapor to below its saturation temperature by transferring heat to condense it into a liquid, thereby saving energy and improving thermal efficiency; fig. 4 is a fan arrangement diagram of a variable frequency fan according to an embodiment of the present invention, as shown in fig. 4, the variable frequency fan is composed of an odd-numbered group fan and an even-numbered group fan, wherein fans 1, 3, 5, and 7.
The variable frequency fan of the embodiment can be applied to refrigerating or heating equipment or systems of air conditioners, refrigerators and the like.
Step S204, calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters;
optionally, the internal and external temperature difference is also referred to as a regulating end temperature difference, denoted by Δt=condensing temperature-ambient temperature+ambient temperature correction value Tx, wherein tx=1 when ambient temperature is less than or equal to 15 ℃; tx=0 when 15 ℃ < ambient temperature < 35 ℃; when the ambient temperature is more than or equal to 35 ℃, tx= -1. The condensing temperature represents the temperature of the refrigerant in the condensing heat exchanger.
Step S206, determining the frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency up-conversion;
in this embodiment, the temperature difference between the inside and outside is an important indicator for evaluating the performance of the refrigeration system. The performance of a refrigeration system is typically dependent on the difference between the condensing temperature and the ambient temperature; in a refrigeration cycle, a lower condensing temperature means a higher refrigeration efficiency, since a lower temperature difference reduces the compression power demand of the refrigerant in the compressor, however, changes in the ambient temperature may have a significant impact on the performance of the refrigeration system, at high ambient temperatures the refrigeration system requires more energy to drive the circulation of the refrigerant, and thus the frequency modulation type of the variable frequency fan is determined from the internal and external temperature differences.
And step S208, if the variable frequency fans meet the independent adjustment condition, independent frequency modulation is carried out on the single fans in the variable frequency fans according to the frequency modulation type.
In the embodiment, through detecting the operation load condition of the whole machine, the environment temperature and the temperature difference condition of the fan adjusting end, the independent frequency rising and falling adjustment is carried out on the single fan in the fan set in a targeted manner, the technical problem of operation fluctuation caused by integral frequency modulation of the fan in the related technology is solved, and the efficient and stable operation of the variable-frequency fan is ensured.
Through the steps, the real-time operation parameters of the variable frequency fan are obtained, wherein the variable frequency fan is formed by sequentially arranging a plurality of fans; calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters; determining a frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase; if the variable frequency fans meet the condition of independent adjustment, the single fans in the variable frequency fans are subjected to independent frequency modulation according to the frequency modulation type, the independent adjustment condition is met by controlling the variable frequency fans, the independent frequency modulation is performed on the single fans in a targeted manner under the condition that the variable frequency fans meet the condition, and when the internal and external temperature difference of the variable frequency fans meet the frequency modulation condition, the independent frequency modulation is performed on the single fans in the variable frequency fans, so that the technical problem of operation fluctuation caused by integral frequency modulation of the fans in the related art is solved, and efficient and stable operation of the variable frequency fans is ensured.
In this embodiment, determining whether the variable frequency fan satisfies the condition of independent adjustment according to the real-time operation parameter includes: judging whether the real-time environment temperature is greater than or equal to a temperature threshold, judging whether the real-time operation load is greater than or equal to a load threshold, and judging whether the real-time frequency is greater than or equal to a frequency threshold, wherein the real-time operation parameters comprise the real-time environment temperature, the real-time frequency and the real-time operation load of the variable-frequency fan; if the ambient temperature is less than the temperature threshold, the running load is less than the load threshold, and the real-time frequency is less than the frequency threshold, judging that the variable frequency fan meets the condition of independent adjustment; and if the ambient temperature is greater than or equal to a temperature threshold, or the running load is greater than or equal to a load threshold, or the real-time frequency is greater than or equal to a frequency threshold, judging that the variable frequency fan does not meet the condition of independent adjustment.
Optionally, the temperature threshold is 30-35 ℃, the load threshold is 35-50% of the unit load, and the frequency threshold is 35% of the maximum frequency of the fan; the method comprises the steps that whether the environmental temperature T is more than or equal to T0 is detected in the running process of a unit (T0 is generally set to be 30-35 ℃, the environmental temperature is higher than the environmental temperature, the condensing heat exchanger is required to be higher, independent adjustment is not carried out on a fan, whether the actual running load Q of the unit is more than or equal to Q0 or not is not, Q0 can be set to be 35% -50% of the unit load, the heat exchange requirement on the side of the fan is higher under the condition that the unit load is larger, the frequency of the fan is generally higher, independent adjustment of the fan is not carried out, whether the real-time frequency f of the fan is more than or equal to 35% f or not is not carried out, independent control of the fan is not carried out if any one of the conditions are met, and independent control of the fan is not carried out.
In this embodiment, determining the frequency modulation type of the variable frequency fan according to the internal and external temperature difference includes: judging whether the internal and external temperature difference is smaller than a first temperature difference threshold value or not, and judging whether the internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not, wherein the second temperature difference threshold value is larger than the first temperature difference threshold value; if the internal-external temperature difference is smaller than a first temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency reduction; and if the internal and external temperature difference is greater than or equal to a second temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency-up.
Optionally, the first temperature difference threshold Δt0 is 5-8 ℃, and the second temperature difference threshold Δt1 is usually set to 8-10 ℃; in the independent control of the fan, detecting whether the temperature difference delta T of the adjusting end of the fan is less than delta T0, if not, maintaining the current state to operate, if so, starting to perform the independent control of the fan, and determining the frequency modulation type of the variable frequency fan to be frequency reduction; and detecting whether the temperature difference delta T of the adjusting end of the fan is more than or equal to delta T1, if not, maintaining the current state operation, and if so, entering the independent adjustment of the fan, and determining that the frequency modulation type of the variable frequency fan is frequency-up.
In this embodiment, performing independent frequency modulation on a single fan of the variable frequency fans according to the frequency modulation type includes: in the independent frequency modulation period, the following steps are adopted to carry out frequency reduction on a single fan until the current internal and external temperature difference of the variable frequency fan is greater than or equal to a first temperature difference threshold value or the frequencies of all fans are 0:
S11, selecting a target fan from the fans according to a preset sequence, and if the current internal and external temperature difference is smaller than the first temperature difference threshold value, performing frequency reduction on the target fan based on a first step length;
optionally, in the independent control of the fan, firstly, whether the temperature difference delta T of the fan adjusting end is smaller than a first temperature difference threshold delta T0 is detected, if not, the current state operation is maintained, and if yes, the independent adjustment and frequency reduction control of the fan is started.
S12, detecting the current internal and external temperature difference of the variable frequency fans, judging whether the current internal and external temperature difference is smaller than the first temperature difference threshold value, and if the current internal and external temperature difference is smaller than the first temperature difference threshold value, selecting the next target fan from the fans according to a preset sequence until the internal and external temperature difference is larger than or equal to the first temperature difference threshold value.
Optionally, entering independent regulation control of the fan, firstly reducing the frequency of the fan 1 by 1% f0, and detecting whether the temperature difference delta T of the fan regulating end is smaller than delta T0 or not after the frequency reduction is finished, and if the temperature difference condition of the fan regulating end is not met, maintaining the current frequency of the fan; if the temperature difference condition of the fan adjusting end is met, the fan 3 is continuously subjected to frequency reduction by 1% f0, and then all odd-numbered groups of fans are adjusted by analogy, all even-numbered groups of fans are adjusted, all fans of the odd-numbered groups and the even-numbered groups are adjusted once to be regarded as one round, and after one round of adjustment is completed, the odd-numbered groups of fans 1 are continuously adjusted until the temperature difference condition of the fan adjusting end is not met any more, wherein the adjustment sequence of the odd-numbered groups and the even-numbered groups of fans can be adjusted.
In this embodiment, the method further includes: judging whether the fan frequencies of all fans of the variable-frequency fan are 0; and if the fan frequencies of all fans of the variable frequency fans are 0, closing the variable frequency fans.
Optionally, if the odd-numbered group fans are firstly down-converted, when the fans are down-converted to the needed states, the odd-numbered group fans 1 are still turned off.
In this embodiment, performing independent frequency modulation on a single fan of the variable frequency fans according to the frequency modulation type includes: obtaining the highest operation frequency of all fans of the variable frequency fan and the real-time operation load of the variable frequency fan at the current time, wherein the real-time operation parameters comprise the highest operation frequency; controlling all fans to raise the frequency to the highest operating frequency, and obtaining the current internal and external temperature difference of the variable frequency fans; judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not; and if the current internal and external temperature difference is greater than or equal to the second temperature difference threshold value, independently raising the frequency of a single fan in the variable frequency fans.
In this embodiment, performing independent frequency up-conversion on a single fan of the variable frequency fans includes: in the independent frequency modulation period, the following steps are adopted to carry out frequency up-conversion on a single fan until the current temperature difference between the inside and the outside of the variable frequency fan is smaller than the second temperature difference threshold value or the real-time operation load of the variable frequency fan is larger than or equal to the load threshold value: selecting a target fan from the fans according to a preset sequence, raising the frequency of the target fan based on a second step length, detecting the current internal and external temperature difference of the variable frequency fan, judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value, and selecting the next target fan from the fans according to the preset sequence if the current internal and external temperature difference is larger than or equal to the second temperature difference threshold value.
Optionally, independently adjusting and raising frequency control of the fans is carried out, the highest running frequency fheight of all fans is detected at the moment, and raising frequency of all fans is controlled to be fheight; then continuously detecting whether the delta T is more than or equal to delta T1, if not, maintaining the current state of the fan, if the delta T is still more than or equal to delta T1, synchronously detecting whether the load Q of the unit is more than or equal to Q0, if so, the load is higher, and exiting independent control of the fan; if Q is smaller than Q0, controlling the frequency of the even-numbered group fans 2 to rise by 1% f0, then synchronously detecting that DeltaT is larger than or equal to DeltaT 1, if not, maintaining the existing state, if yes, continuing to adjust the fans 4, and so on, firstly adjusting all the even-numbered group fans, and then adjusting all the odd-numbered group fans until the temperature difference condition inside and outside the fans is not met; when the dual-array fan is adjusted, the load of the unit is synchronously and continuously detected, and Q is more than or equal to Q0, namely the independent adjustment is exited; the adjustment of the fans in the odd groups is to synchronously detect the highest running frequency of the current fans, and when the fheight is more than or equal to 35% f0, the independent adjustment is stopped, wherein the adjustment sequence of the fans in the odd groups and the fans in the even groups can be exchanged.
Fig. 5 is an overall flowchart of a method for controlling the frequency-reducing of the variable frequency fan according to an embodiment of the present invention, as shown in fig. 5, the flowchart includes the following steps:
Detecting whether the environmental temperature T is more than or equal to T0, the actual running load Q of the unit is more than or equal to Q0 and the real-time frequency f of the fan is more than or equal to 35% f in the running process of the unit, and if any one of the environmental temperature T and the real-time frequency f is met, the unit does not enter independent control of the fan; otherwise, the air blower is independently controlled;
in the independent control of the fan, firstly detecting whether the temperature difference delta T of the adjusting end of the fan is less than delta T0, if not, maintaining the current state to operate, and if so, starting to perform independent adjustment control of the fan;
the independent regulation and control of the fan are carried out, the fan 1 is firstly subjected to frequency reduction by 1 percent f0, whether the temperature difference delta T of the regulating end of the fan is smaller than delta T0 is detected again after the frequency reduction is finished, and if the temperature difference delta T is not smaller than delta T0, the current frequency is maintained by the fan; if the temperature difference condition of the fan adjusting end is met, continuing to reduce the frequency of the fan 3 by 1% f0, and then analogizing, firstly adjusting all the fans of the odd numbered groups, then adjusting all the fans of the even numbered groups, adjusting all the fans of the odd numbered groups and the even numbered groups once to be regarded as one wheel, detecting whether the frequencies of all the fans are consistent, if the frequencies of all the fans are consistent, indicating that one wheel of adjustment is finished, and continuing to adjust from the fan 1 of the odd numbered groups after one wheel of adjustment is finished, until the temperature difference condition of the fan adjusting end is not met any more;
when the fans are down-converted to the required state, the fans are still turned off from the odd-numbered groups of fans 1.
Fig. 6 is an overall flowchart of an up-conversion control method of a variable frequency fan according to an embodiment of the present invention, as shown in fig. 6, the flowchart includes the following steps:
during the running process of the unit, firstly judging whether the fan of the unit is in independent regulation control, if not, maintaining the original state; if yes, detecting whether the temperature difference delta T of the fan adjusting end is more than or equal to delta T1, if not, maintaining the original state, and if yes, entering the fan independently adjusting and frequency-raising control;
the method comprises the steps of entering independent regulation and frequency-raising control of fans, detecting the highest running frequency fheight of all fans at the moment, and controlling the frequency-raising of all fans to fheight;
continuously detecting whether the delta T is more than or equal to delta T1, if not, maintaining the current state of the fan, if the delta T is still more than or equal to delta T1, synchronously detecting whether the load Q of the unit is more than or equal to Q0, if so, at the moment, the load is higher, and exiting independent control of the fan; if Q is less than Q0, entering S54 for adjustment;
controlling the frequency of the even-numbered group fans 2 to rise by 1% f0, then synchronously detecting that DeltaT is more than or equal to DeltaT 1, if not, maintaining the existing state, if yes, continuing to adjust the fans 4, and so on, firstly adjusting all the even-numbered group fans, and then adjusting all the odd-numbered group fans until the temperature difference condition of the fan adjusting end is not met; when the dual-array fan is adjusted, the load of the unit is synchronously and continuously detected, and Q is more than or equal to Q0, namely the independent adjustment is exited; and synchronously detecting the highest running frequency of the current fans when the odd-numbered group fans are regulated, and exiting independent regulation when the fheight is more than or equal to 35% f 0.
By adopting the scheme of the embodiment, under the condition of low load and small air volume requirement of the variable frequency fan, detecting load, ambient temperature and temperature difference of a fan adjusting end to judge whether the variable frequency fan enters independent adjustment, and according to the fan arrangement condition, independently reducing the frequency of the fan based on a preset step length; and the fan frequency raising is controlled according to the change condition of the fan load and the temperature difference inside and outside the fan; the variable frequency fan is controlled to meet the condition of independent adjustment, and the technical means of frequency rising and falling of the single fan is achieved under the condition that the variable frequency fan meets the condition, so that the technical problems of operation fluctuation and independent fan adjustment caused by integral frequency modulation of the fan under the low-load small-air-volume requirement are solved, fine adjustment under the low-load small-air-volume requirement is met, and efficient and stable operation of the variable frequency fan is guaranteed.
From the description of the above embodiments, it will be clear to a person skilled in the art that the method according to the above embodiments may be implemented by means of software plus the necessary general hardware platform, but of course also by means of hardware, but in many cases the former is a preferred embodiment. Based on such understanding, the technical solution of the present invention may be embodied essentially or in a part contributing to the prior art in the form of a software product stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) comprising instructions for causing a terminal device (which may be a mobile phone, a computer, a variable frequency air conditioner, or a network device, etc.) to perform the method according to the embodiments of the present invention.
Example 2
The embodiment also provides a variable frequency air conditioner, which is used for realizing the embodiment and the preferred implementation manner, and the description is omitted. The term "module" as used below may implement a combination of software and hardware for subscription functions. While the means described in the following embodiments are preferably implemented in software, implementations in hardware, or a combination of software and hardware, are also contemplated.
Fig. 7 is a block diagram of a variable frequency air conditioner according to an embodiment of the present invention, and as shown in fig. 7, the apparatus includes:
the acquisition module 70 is configured to acquire real-time operation parameters of the variable frequency fan, where the variable frequency fan is formed by sequentially arranging a plurality of fans;
a judging module 72, configured to calculate an internal and external temperature difference of the variable frequency fan according to the real-time operation parameter, and judge whether the variable frequency fan meets an independent adjustment condition according to the real-time operation parameter;
a determining module 74, configured to determine a frequency modulation type of the variable frequency fan according to the internal and external temperature difference, where the frequency modulation type includes frequency reduction and frequency up-conversion;
and the adjusting module 76 is configured to independently tune the frequency of each fan according to the frequency modulation type if the frequency conversion fans meet the independent adjustment condition.
Optionally, the judging module includes: the judging unit is used for judging whether the real-time environment temperature is greater than or equal to a temperature threshold value, judging whether the real-time operation load is greater than or equal to a load threshold value and judging whether the real-time frequency is greater than or equal to a frequency threshold value, wherein the real-time operation parameters comprise the real-time environment temperature, the real-time frequency and the real-time operation load of the variable-frequency fan; the confirmation unit is used for judging that the variable frequency fan meets the condition of independent adjustment if the ambient temperature is smaller than the temperature threshold value, the running load is smaller than the load threshold value, and the real-time frequency is smaller than the frequency threshold value; and if the ambient temperature is greater than or equal to a temperature threshold, or the running load is greater than or equal to a load threshold, or the real-time frequency is greater than or equal to a frequency threshold, judging that the variable frequency fan does not meet the condition of independent adjustment.
Optionally, the determining module includes: the judging unit is used for judging whether the internal and external temperature difference is smaller than a first temperature difference threshold value or not and judging whether the internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not, wherein the second temperature difference threshold value is larger than the first temperature difference threshold value; the determining unit is used for determining that the frequency modulation type of the variable frequency fan is frequency reduction if the internal and external temperature difference is smaller than a first temperature difference threshold value; and if the internal and external temperature difference is greater than or equal to a second temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency-up.
Optionally, the adjustment module includes: the first selecting unit is used for selecting one target fan from the fans according to a preset sequence; the frequency reducing unit is used for reducing the frequency of the target fan based on a first step length if the current internal and external temperature difference is smaller than the first temperature difference threshold value; the detection unit is used for detecting the current internal and external temperature difference of the variable frequency fan; the judging unit is used for judging whether the current internal and external temperature difference is smaller than the first temperature difference threshold value, and the selecting unit is used for selecting the next target fan from the fans according to a preset sequence until the internal and external temperature difference is larger than or equal to the first temperature difference threshold value if the current internal and external temperature difference is smaller than the first temperature difference threshold value.
Optionally, the adjusting module further comprises: the judging unit is used for judging whether the fan frequencies of all fans of the variable-frequency fan are 0; and the closing unit is used for closing the variable frequency fans if the fan frequencies of all fans of the variable frequency fans are 0.
Optionally, the adjusting module further comprises: the acquisition unit is used for acquiring the highest running frequency of all fans of the variable-frequency fan and the real-time running load of the variable-frequency fan at the current time, wherein the real-time running parameters comprise the highest running frequency; the control unit is used for controlling all fans to be increased to the highest operating frequency and obtaining the current internal and external temperature difference of the variable-frequency fans; the judging unit is used for judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value; and the control unit is used for carrying out independent frequency raising on a single fan in the variable frequency fan if the current internal and external temperature difference is greater than or equal to the second temperature difference threshold value.
Optionally, the control unit includes: the first selecting subunit is used for selecting one target fan from the fans according to a preset sequence; the frequency-raising subunit is used for frequency-raising the target fan based on a second step length; the detection subunit is used for detecting the current internal and external temperature difference of the variable frequency fan; the judging subunit is used for judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value; and the second judging subunit is used for selecting a next target fan from the fans according to a preset sequence if the current internal and external temperature difference is greater than or equal to a second temperature difference threshold value.
It should be noted that each of the above modules may be implemented by software or hardware, and for the latter, it may be implemented by, but not limited to: the modules are all located in the same processor; alternatively, the above modules may be located in different processors in any combination.
Example 3
An embodiment of the invention also provides a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the method embodiments described above when run.
Alternatively, in the present embodiment, the above-described storage medium may be configured to store a computer program for execution:
s1, acquiring real-time operation parameters of the variable frequency fan, wherein the variable frequency fan is formed by sequentially arranging a plurality of fans;
s2, calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters;
s3, determining a frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase;
s4, if the variable frequency fans meet the independent adjustment condition, independent frequency modulation is carried out on the single fan in the variable frequency fans according to the frequency modulation type.
Alternatively, in the present embodiment, the storage medium may include, but is not limited to: a usb disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing a computer program.
An embodiment of the invention also provides an electronic device comprising a memory having stored therein a computer program and a processor arranged to run the computer program to perform the steps of any of the method embodiments described above.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, where the transmission device is connected to the processor, and the input/output device is connected to the processor.
Alternatively, in the present embodiment, the above-described processor may be configured to execute the following steps by a computer program:
s1, acquiring real-time operation parameters of the variable frequency fan, wherein the variable frequency fan is formed by sequentially arranging a plurality of fans;
s2, calculating the internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters;
s3, determining a frequency modulation type of the variable frequency fan according to the internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase;
s4, if the variable frequency fans meet the independent adjustment condition, independent frequency modulation is carried out on the single fan in the variable frequency fans according to the frequency modulation type.
Alternatively, specific examples in this embodiment may refer to examples described in the foregoing embodiments and optional implementations, and this embodiment is not described herein.
The foregoing embodiment numbers of the present application are merely for describing, and do not represent advantages or disadvantages of the embodiments.
In the foregoing embodiments of the present application, the descriptions of the embodiments are emphasized, and for a portion of this disclosure that is not described in detail in this embodiment, reference is made to the related descriptions of other embodiments.
In the several embodiments provided in the present application, it should be understood that the disclosed technology content may be implemented in other manners. The above-described embodiments of the apparatus are merely exemplary, and are merely a logical functional division, and there may be other manners of dividing the apparatus in actual implementation, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be through some interfaces, units or modules, or may be in electrical or other forms.
The units described as separate units may or may not be physically separate, and units shown as units may or may not be physical units, may be located in one place, or may be distributed over a plurality of network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
In addition, each functional unit in each embodiment of the present application may be integrated in one processing unit, or each unit may exist alone physically, or two or more units may be integrated in one unit. The integrated units may be implemented in hardware or in software functional units.
The integrated units, if implemented in the form of software functional units and sold or used as stand-alone products, may be stored in a computer-readable storage medium. Based on such understanding, the technical solution of the present application may be embodied in essence or a part contributing to the prior art or all or part of the technical solution, in the form of a software product stored in a storage medium, including several instructions for causing a computer device (which may be a personal computer, a variable frequency air conditioner or a network device, etc.) to perform all or part of the steps of the methods of the embodiments of the present application. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a random access Memory (RAM, random Access Memory), a removable hard disk, a magnetic disk, or an optical disk, or other various media capable of storing program codes.
The foregoing is merely a preferred embodiment of the present application and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present application and are intended to be comprehended within the scope of the present application.
Claims (9)
1. The control method of the variable frequency fan is characterized by comprising the following steps of:
acquiring real-time operation parameters of the variable frequency fans, wherein the variable frequency fans are formed by sequentially arranging a plurality of fans;
calculating the current internal and external temperature difference of the variable frequency fan according to the real-time operation parameters, and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters;
determining a frequency modulation type of the variable frequency fan according to the current internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase;
if the variable frequency fans meet the independent adjustment condition, independent frequency modulation is carried out on single fans in the variable frequency fans according to the frequency modulation type;
wherein, according to the frequency modulation type, the independent frequency modulation of the single fan in the variable frequency fan comprises: obtaining the highest operation frequency of all fans of the variable frequency fan and the real-time operation load of the variable frequency fan at the current time, wherein the real-time operation parameters comprise the highest operation frequency; controlling all fans to raise the frequency to the highest operating frequency, and obtaining the current internal and external temperature difference of the variable frequency fans; judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not; and if the current internal and external temperature difference is greater than or equal to the second temperature difference threshold value, independently raising the frequency of a single fan in the variable frequency fans.
2. The method of claim 1, wherein determining whether the variable frequency fan satisfies an independent adjustment condition based on the real-time operating parameter comprises:
judging whether the real-time environment temperature is greater than or equal to a temperature threshold value, judging whether the real-time operation load is greater than or equal to a load threshold value, and judging whether the real-time frequency is greater than or equal to a frequency threshold value, wherein the real-time operation parameters comprise the real-time environment temperature, the real-time frequency and the real-time operation load of the variable-frequency fan;
if the real-time environment temperature is smaller than the temperature threshold, the real-time operation load is smaller than the load threshold, and the real-time frequency is smaller than the frequency threshold, judging that the variable frequency fan meets the condition of independent adjustment; and if the real-time environment temperature is greater than or equal to a temperature threshold, or the real-time running load is greater than or equal to a load threshold, or the real-time frequency is greater than or equal to a frequency threshold, judging that the variable frequency fan does not meet the condition of independent adjustment.
3. The method of claim 1, wherein determining the frequency modulation type of the variable frequency fan based on the current internal and external temperature difference comprises:
judging whether the current internal and external temperature difference is smaller than a first temperature difference threshold value or not, and judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value or not, wherein the second temperature difference threshold value is larger than the first temperature difference threshold value;
If the current internal-external temperature difference is smaller than a first temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency reduction; and if the current internal and external temperature difference is greater than or equal to a second temperature difference threshold value, determining that the frequency modulation type of the variable frequency fan is frequency-up.
4. The method of claim 1, wherein independently frequency modulating individual ones of the variable frequency fans according to the frequency modulation type comprises:
in the independent frequency modulation period, the following steps are adopted to carry out frequency reduction on a single fan until the current internal and external temperature difference of the variable frequency fan is greater than or equal to a first temperature difference threshold value or the frequencies of all fans are 0: and selecting one target fan from the fans according to a preset sequence, if the current internal and external temperature difference is smaller than the first temperature difference threshold, performing frequency reduction on the target fan based on a first step length, detecting the current internal and external temperature difference of the variable frequency fan, judging whether the current internal and external temperature difference is smaller than the first temperature difference threshold, and if the current internal and external temperature difference is smaller than the first temperature difference threshold, selecting the next target fan from the fans according to the preset sequence until the current internal and external temperature difference is larger than or equal to the first temperature difference threshold.
5. The method according to claim 4, wherein the method further comprises:
judging whether the fan frequencies of all fans of the variable-frequency fan are 0;
and if the fan frequencies of all fans of the variable frequency fans are 0, closing the variable frequency fans.
6. The method of claim 1, wherein independently upconverting a single one of the variable frequency fans comprises:
in the independent frequency modulation period, the following steps are adopted to carry out frequency up-conversion on a single fan until the current temperature difference between the inside and the outside of the variable frequency fan is smaller than the second temperature difference threshold value or the real-time operation load of the variable frequency fan is larger than or equal to the load threshold value: selecting a target fan from the fans according to a preset sequence, raising the frequency of the target fan based on a second step length, detecting the current internal and external temperature difference of the variable frequency fan, judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value, and selecting the next target fan from the fans according to the preset sequence if the current internal and external temperature difference is larger than or equal to the second temperature difference threshold value.
7. A variable frequency air conditioner, characterized by comprising:
the acquisition module is used for acquiring real-time operation parameters of the variable frequency fans, wherein the variable frequency fans are formed by sequentially arranging a plurality of fans;
The judging module is used for calculating the current internal and external temperature difference of the variable frequency fan according to the real-time operation parameters and judging whether the variable frequency fan meets the independent regulation condition according to the real-time operation parameters;
the determining module is used for determining the frequency modulation type of the variable frequency fan according to the current internal and external temperature difference, wherein the frequency modulation type comprises frequency reduction and frequency increase;
the adjusting module is used for independently adjusting the frequency of a single fan in the variable frequency fans according to the frequency modulation type if the variable frequency fans meet the independent adjustment condition;
wherein the adjustment module further comprises: the acquisition unit is used for acquiring the highest running frequency of all fans of the variable-frequency fan and the real-time running load of the variable-frequency fan at the current time, wherein the real-time running parameters comprise the highest running frequency; the control unit is used for controlling all fans to be increased to the highest operating frequency and obtaining the current internal and external temperature difference of the variable-frequency fans; the judging unit is used for judging whether the current internal and external temperature difference is larger than or equal to a second temperature difference threshold value; and the control unit is used for carrying out independent frequency raising on a single fan in the variable frequency fan if the current internal and external temperature difference is greater than or equal to the second temperature difference threshold value.
8. A storage medium, characterized in that the storage medium has stored therein a computer program, wherein the computer program is arranged to perform the method of any of claims 1 to 6 when run.
9. An electronic device comprising a memory and a processor, characterized in that the memory has stored therein a computer program, the processor being arranged to run the computer program to perform the method of any of claims 1 to 6.
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| CN102253700A (en) * | 2010-05-20 | 2011-11-23 | 英业达科技有限公司 | Fan control system |
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| WO2013090926A1 (en) * | 2011-12-16 | 2013-06-20 | Rembach Paul F | System and method for cooling and maintaining building containing heat generating electronics |
| CN104197466A (en) * | 2014-08-08 | 2014-12-10 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
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| US11034210B2 (en) * | 2019-08-16 | 2021-06-15 | Lennox Industries Inc. | Peak demand response operation of HVAC systems |
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| CN102253700A (en) * | 2010-05-20 | 2011-11-23 | 英业达科技有限公司 | Fan control system |
| CN102828943A (en) * | 2011-06-13 | 2012-12-19 | Lg电子株式会社 | Machine including compressor controlling apparatus and method |
| WO2013090926A1 (en) * | 2011-12-16 | 2013-06-20 | Rembach Paul F | System and method for cooling and maintaining building containing heat generating electronics |
| CN104197466A (en) * | 2014-08-08 | 2014-12-10 | 珠海格力电器股份有限公司 | Air conditioner and control method thereof |
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