CN111780381A - Fan control method and device and air conditioner external unit - Google Patents
Fan control method and device and air conditioner external unit Download PDFInfo
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- CN111780381A CN111780381A CN202010486175.3A CN202010486175A CN111780381A CN 111780381 A CN111780381 A CN 111780381A CN 202010486175 A CN202010486175 A CN 202010486175A CN 111780381 A CN111780381 A CN 111780381A
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- input voltage
- temperature
- voltage
- air conditioner
- compressor
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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
- F24F11/70—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
- F24F11/87—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units
- F24F11/871—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling absorption or discharge of heat in outdoor units by controlling outdoor fans
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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
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/22—Arrangement or mounting thereof
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
- F24F2110/12—Temperature of the outside air
Abstract
The invention provides a control method and device of a fan and an air conditioner outdoor unit, wherein the method comprises the following steps: detecting input voltage of an intelligent power module IPM module and outer ring temperature of an air conditioner outer unit, wherein the IPM module is integrated on a compressor of the air conditioner outer unit; and controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature. The invention solves the technical problem that the outdoor unit of the air conditioner frequently triggers the frequency-limiting reduction protection under the high-temperature condition in the related technology, can ensure that the temperature of the IPM module can not trigger the frequency-limiting reduction point of the system when the outdoor unit operates under the severe working condition, thereby achieving the purpose that the system can continuously refrigerate to protect the stable operation of the system, protecting the IPM module of the compressor from being burnt due to overheating, reducing the temperature rise of an electric control component under the severe working condition, prolonging the service life of the component, avoiding the damage of the module caused by the overheating of the IPM module of the compressor under the severe working condition, and improving the working reliability of.
Description
Technical Field
The invention relates to the field of automation, in particular to a control method and device of a fan and an air conditioner outdoor unit.
Background
In the related art, an Intelligent Power Module (Intelligent Power Module) is mainly used in a variable frequency driving circuit to convert a direct current into an alternating current so as to drive a motor. In the design of the air conditioner external unit, the monitoring of the real-time temperature of the IPM module of the compressor plays a very important role, and the IPM module of the compressor is used as a key component of a drive plate of the compressor, if the IPM temperature of the compressor is not protected, the IPM module of the compressor can be burnt due to overheating, so that the system is shut down, and the customer experience and the reliability of the compressor are influenced.
Among many factors of the system, the IPM module temperature is determined by IPM current, and if the outdoor unit is in a severe working condition (for example, the external environment temperature is high, and the input voltage is low), under a certain power condition, in order to ensure the cooling capacity of the whole unit, the current is much higher than that of the outdoor unit under a normal working condition, so the module temperature will surge.
In the related art, a thermistor is built in a module to collect the junction temperature of the module, a frequency limiting and reducing protection point related to the module temperature is set in a system, and the temperature is controlled by collecting the temperature, but certain disadvantages exist at the same time: the refrigerating capacity of the whole machine and the temperature rise of the module under the severe working condition are not concerned about how to simultaneously meet the requirements to the maximum extent, once the temperature of the module is overhigh, the frequency limiting protection of the system is frequently triggered, the system is caused to run incoherently, and the refrigerating capacity of the whole machine is influenced.
In view of the above problems in the related art, no effective solution has been found at present.
Disclosure of Invention
The embodiment of the invention provides a control method and device of a fan and an air conditioner external unit, and aims to solve the technical problem that the air conditioner external unit frequently triggers frequency-limiting frequency reduction protection under a high-temperature condition in the related art.
According to an embodiment of the present invention, there is provided a control method of a fan, including: detecting input voltage of an intelligent power module IPM module and outer ring temperature of an air conditioner outer unit, wherein the IPM module is integrated on a compressor of the air conditioner outer unit; and controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
Optionally, controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature includes: judging whether the outer ring temperature meets a first preset condition or not, wherein the first preset condition is used for representing that the air conditioner external unit operates in a high-temperature state; if the outer ring temperature meets a first preset condition, judging whether the input voltage meets a second preset condition, wherein the second preset condition is used for representing that the air conditioner outer unit operates in a low-voltage state; if the input voltage does not meet a second preset condition, controlling the compressor to increase the current fan frequency to a first fan frequency; and if the input voltage meets a second preset condition, controlling the compressor to increase the current fan frequency to a second fan frequency, wherein the second fan frequency is greater than the first fan frequency.
Optionally, the determining whether the outer ring temperature meets a first preset condition includes: calculating the temperature difference of subtracting the outer ring temperature from a temperature threshold, wherein the temperature threshold is the maximum working temperature of the air conditioner external unit; judging whether the temperature difference is smaller than a preset value or not; if the temperature difference is smaller than a preset value, determining that the temperature of the outer ring meets a first preset condition; and if the temperature difference is greater than or equal to a preset value, determining that the outer ring temperature does not meet a first preset condition.
Optionally, the determining whether the input voltage meets a second preset condition includes: comparing the input voltage with a first voltage threshold, and comparing the input voltage with a second voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit, and the second voltage threshold is the rated voltage of the air conditioner outdoor unit; judging whether the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold; if the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, determining that the input voltage does not meet a second preset condition; and if the input voltage is equal to the first voltage threshold, determining that the input voltage meets a second preset condition.
Optionally, the method further includes: and if the outer ring temperature does not meet a first preset condition, controlling the compressor to maintain the current fan frequency.
Optionally, the method further includes: judging whether the input voltage is smaller than a first voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit; and if the input voltage is less than the first voltage threshold, closing the compressor.
Optionally, detecting the input voltage of the IPM module includes: collecting voltage values at two ends of a sampling resistor, wherein the sampling resistor is arranged at the input side of alternating-current voltage of the IPM module; converting the voltage value into an electrical signal; and amplifying the electric signal by using a linear amplifier to obtain the input voltage.
According to another embodiment of the present invention, there is provided a control apparatus of a fan including: the detection module is used for detecting the input voltage of the intelligent power module IPM module and the outer ring temperature of the air conditioner external unit, wherein the IPM module is integrated on a compressor of the air conditioner external unit; and the first control module is used for controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
Optionally, the first control module includes: the first judging unit is used for judging whether the outer ring temperature meets a first preset condition or not, wherein the first preset condition is used for representing that the air conditioner outdoor unit operates in a high-temperature state; the second judging unit is used for judging whether the input voltage meets a second preset condition or not if the outer ring temperature meets a first preset condition, wherein the second preset condition is used for representing that the air conditioner outdoor unit operates in a low-voltage state; the first control unit is used for controlling the compressor to increase the current fan frequency to a first fan frequency if the input voltage does not meet a second preset condition; and if the input voltage meets a second preset condition, controlling the compressor to increase the current fan frequency to a second fan frequency, wherein the second fan frequency is greater than the first fan frequency.
Optionally, the first determining unit includes: the calculation subunit is configured to calculate a temperature difference between a temperature threshold and the outer ring temperature, where the temperature threshold is a maximum working temperature of the air conditioner external unit; the judging subunit is used for judging whether the temperature difference is smaller than a preset value; the determining subunit is used for determining that the outer ring temperature meets a first preset condition if the temperature difference is smaller than a preset value; and if the temperature difference is greater than or equal to a preset value, determining that the outer ring temperature does not meet a first preset condition.
Optionally, the second judging unit includes: the comparison subunit is configured to compare the input voltage with a first voltage threshold, and compare the input voltage with a second voltage threshold, where the first voltage threshold is a lowest operating voltage of the air conditioner external unit, and the second voltage threshold is a rated voltage of the air conditioner external unit; the judging subunit is used for judging whether the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold; determining a unit element, configured to determine that the input voltage does not satisfy a second preset condition if the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold; and if the input voltage is equal to the first voltage threshold, determining that the input voltage meets a second preset condition.
Optionally, the first control module further includes: and the second control unit is used for controlling the compressor to maintain the current fan frequency if the outer ring temperature does not meet the first preset condition.
Optionally, the apparatus further comprises: the judging module is used for judging whether the input voltage is smaller than a first voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit; and the second control module is used for closing the compressor if the input voltage is smaller than the first voltage threshold.
Optionally, the detection module includes: the sampling unit is used for collecting voltage values at two ends of a sampling resistor, wherein the sampling resistor is arranged at the input side of alternating-current voltage of the IPM module; the conversion unit is used for converting the voltage value into an electric signal; and the amplifying unit is used for amplifying the electric signal by adopting a linear amplifier to obtain the input voltage.
According to another embodiment of the present invention, there is also provided an outdoor unit of an air conditioner, including a compressor and a controller, wherein the controller is the apparatus as described in the above embodiments.
According to a further embodiment of the present invention, there is also provided a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps in any of the apparatus embodiments described above when executed.
According to yet another embodiment of the present invention, there is also provided an electronic device, including a memory in which a computer program is stored and a processor configured to execute the computer program to perform the steps in any of the above method embodiments.
By the invention, the input voltage of the IPM module of the intelligent power module and the outer ring temperature of the air conditioner outer unit are detected, then the fan frequency of the compressor is controlled according to the input voltage and the outer ring temperature, the fan frequency is cooperatively controlled through the input voltage and the outer ring temperature to reduce the temperature of the IPM module, the technical problem that the air conditioner outdoor unit frequently triggers the frequency limiting and reducing protection under the high temperature condition in the related technology is solved, can ensure that the temperature of the IPM module can not trigger the frequency limiting point of the system when the outer unit operates under the severe working condition, therefore, the system can continuously refrigerate to protect the system from running stably, the IPM module of the compressor is protected from being burnt due to overheating, the temperature rise of an electric control component under a severe working condition is reduced, the service life of the component is prolonged, the damage of the module due to the overheating of the IPM module of the compressor under the severe working condition is avoided, and the working reliability of the compressor is improved; the problem of component temperature rise caused by excessive heating of the IPM module of the compressor under severe working conditions is avoided, the service life of the whole machine is prolonged, frequent protection of the compressor is avoided, air conditioner operation is not consistent, and customer experience is influenced.
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 embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 is a block diagram of a structure of a fan controlled air conditioner according to an embodiment of the present invention;
FIG. 2 is a flow chart of a method for controlling a fan according to an embodiment of the present invention;
FIG. 3 is a system block diagram of an embodiment of the present invention;
FIG. 4 is a system control logic flow diagram of an embodiment of the present invention;
fig. 5 is a block diagram of a control device of a fan according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order.
Example 1
The method provided by the first embodiment of the present application may be executed in a processor, an air conditioner, an outdoor unit of an air conditioner, a controller, or similar electronic devices. Taking operation on an air conditioner as an example, fig. 1 is a structural block diagram of a fan-controlled air conditioner according to an embodiment of the present invention. As shown in fig. 1, the air conditioner 10 may include one or more (only one shown in fig. 1) processors 102 (the processors 102 may include, but are not limited to, a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data, and optionally, an input and output device 108. It will be understood by those skilled in the art that the structure shown in fig. 1 is only an illustration, and it does not limit the structure of the air conditioner. For example, the air conditioner 10 may also include more or fewer components than shown in FIG. 1, or have a different configuration than shown in FIG. 1.
The memory 104 may be used to store an air conditioning program, for example, a software program and a module of application software, such as an air conditioning program corresponding to a control method of a blower in an embodiment of the present invention, and the processor 102 executes various functional applications and data processing by running the air conditioning program stored in the memory 104, that is, implementing the above-described method. The 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 located remotely from the processor 102, which may be connected to the air conditioner 10 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 for receiving or transmitting data via a network. Specific examples of the network described above may include a wireless network provided by a communication provider of the air conditioner 10. In one example, the transmission device 106 includes a Network adapter (NIC), which can be connected to other Network devices through a base station so as to communicate with the internet. In one example, the transmission device 106 may be a Radio Frequency (RF) module, which is used for communicating with the internet in a wireless manner.
In this embodiment, a method for controlling a fan is provided, and fig. 2 is a flowchart of a method for controlling a fan according to an embodiment of the present invention, as shown in fig. 2, the flowchart includes the following steps:
step S202, detecting the input voltage of an intelligent power module IPM module and the outer ring temperature of an air conditioner external unit, wherein the IPM module is integrated on a compressor of the air conditioner external unit;
in this embodiment, the outer ring temperature is the outdoor temperature of the air conditioner external unit, the input voltage is the voltage of the alternating current at the input end of the IPM module, the outer ring temperature can be collected by the temperature sensor, and the input voltage is collected by the sampling resistor.
And S204, controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
The fan frequency of this embodiment is the rotational frequency of compressor fan, and the frequency is big more, and the heat dissipation is faster, through controlling fan frequency, can control the outward appearance temperature of IPM module, prevents overheated.
The IPM module temperature is mainly influenced by the IPM current, the IPM current is mainly influenced by the working condition, for the air-cooled radiating unit, if the outer machine is in the working condition that the outer ring temperature is high and the input voltage is low, the current can be increased under the condition of certain power, the frequency of the fan can be controlled under the condition, so that the temperature of the IPM module does not exceed the maximum allowable temperature under the severe working condition, the frequency of the system can not be reduced, and the system can not operate stably.
Through the steps, the input voltage of the intelligent power module IPM module and the outer ring temperature of the air conditioner outer unit are detected, then the fan frequency of the compressor is controlled according to the input voltage and the outer ring temperature, the fan frequency is cooperatively controlled through the input voltage and the outer ring temperature to reduce the temperature of the IPM module, the technical problem that the air conditioner outdoor unit frequently triggers the frequency limiting and reducing protection under the high temperature condition in the related technology is solved, can ensure that the temperature of the IPM module can not trigger the frequency limiting point of the system when the outer unit operates under the severe working condition, therefore, the system can continuously refrigerate to protect the system from running stably, the IPM module of the compressor is protected from being burnt due to overheating, the temperature rise of an electric control component under a severe working condition is reduced, the service life of the component is prolonged, the damage of the module due to the overheating of the IPM module of the compressor under the severe working condition is avoided, and the working reliability of the compressor is improved; the problem of component temperature rise caused by excessive heating of the IPM module of the compressor under severe working conditions is avoided, the service life of the whole machine is prolonged, frequent protection of the compressor is avoided, air conditioner operation is not consistent, and customer experience is influenced.
In one embodiment of this embodiment, controlling the fan frequency of the compressor based on the input voltage and the outer loop temperature comprises:
s11, judging whether the outer ring temperature meets a first preset condition, wherein the first preset condition is used for representing that the air conditioner outer unit operates in a high-temperature state;
optionally, the determining whether the outer ring temperature meets the first preset condition includes: calculating the temperature difference of subtracting the outer ring temperature from the temperature threshold, wherein the temperature threshold is the maximum working temperature of the air conditioner external unit; judging whether the temperature difference is smaller than a preset value or not; if the temperature difference is smaller than a preset value, determining that the temperature of the outer ring meets a first preset condition; and if the temperature difference is greater than or equal to the preset value, determining that the outer ring temperature does not meet the first preset condition.
Optionally, the preset value is set to 8 ℃, and may also be adjusted according to the type of the air conditioner, the type of the compressor, or the operating environment of the entire machine, the temperature threshold is the maximum heat content of the external machine, that is, the maximum allowable operating temperature Tmax of the machine set, which may be set to 45 ℃ (factory setting), or may be set according to the actual operating environment, when the difference between the maximum allowable operating temperature of the external machine and the outer ring temperature value is greater than 8 ℃, the outer ring temperature of the external machine of the air conditioner is relatively large, the temperature difference is relatively small, the external machine reaches a high temperature state, and it needs to be determined whether it needs to be protected, for example, S12, further determination is performed by inputting voltage, whether the IPM module needs to be protected by controlling the.
S12, if the outer ring temperature meets a first preset condition, judging whether the input voltage meets a second preset condition, wherein the second preset condition is used for representing that the air conditioner outer unit operates in a low-voltage state;
the low-voltage state of the present embodiment is a low-voltage operating state, that is, the operating voltage is lower than the rated voltage.
Optionally, the determining whether the input voltage meets the second preset condition includes: comparing the input voltage with a first voltage threshold, and comparing the input voltage with a second voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit, and the second voltage threshold is the rated voltage of the air conditioner outdoor unit; judging whether the input voltage is less than or equal to a second voltage threshold and greater than a first voltage threshold; if the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, determining that the input voltage does not meet a second preset condition; and if the input voltage is equal to the first voltage threshold, determining that the input voltage meets a second preset condition.
In this embodiment, the first voltage threshold Umin1 is the minimum allowable input voltage of the outdoor unit, and if the input voltage is less than Umin1, the outdoor unit cannot operate; the second voltage threshold Umin2 is a low input voltage, which is greater than Umin1, at which the outdoor unit can operate. In one example, the outdoor unit of the air conditioner 165VAC is the lowest allowable input voltage, 220VAC is the rated voltage, 265VAC is the high input voltage, Umin2 is between the lowest allowable input voltage and the rated voltage, and the value ranges are as follows: 165VAC < Umin2<220 VAC.
S13, if the input voltage does not meet a second preset condition, controlling the compressor to increase from the current fan frequency to the first fan frequency; and if the input voltage meets a second preset condition, controlling the compressor to increase the current fan frequency to a second fan frequency, wherein the second fan frequency is greater than the first fan frequency.
In the embodiment, a first voltage threshold (Umin1), a second voltage threshold (Umin2), a first fan Frequency (FA), a second fan Frequency (FB), a temperature threshold Tmax, and a difference value Δ T (Δ T is Tmax-T) between the maximum allowable operation temperature of the unit and the outdoor real-time environment temperature (outer ring temperature) are set, wherein Umin2> Umin1, FB > FA > F (current frequency) are set for the service life of the whole machine, the cooling operation of the module is started only when the outdoor unit is operated at the maximum allowable operation temperature, a margin should be left, and the module is cooled in advance, so when Δ T (the difference between the maximum allowable operation temperature of the outdoor unit and the actual value of the outer ring temperature) is set to be less than 8 ℃, the outdoor unit is considered to be in a high-temperature working condition and needs to be cooled down by the fan, and when the module is heated seriously, the fan frequency is increased to be the module on the basis of the existing fan operation frequency, therefore, the IPM module and the external unit work at normal temperature, and the stability and the service life of the whole air conditioner are improved.
In some scenes, the air conditioner outdoor unit operates in a safe and stable state, the outdoor unit does not have the risk of heating, and the current frequency of the fan can be maintained. And if the outer ring temperature does not meet the first preset condition, controlling the compressor to maintain the current fan frequency.
If the running state of the air conditioner outdoor unit does not meet the first preset condition, namely the temperature difference is greater than or equal to the preset value, the current temperature of the air conditioner outdoor unit can be determined to be appropriate, the temperature reduction is not needed, the current fan frequency is maintained, the running stability of the air conditioner can be ensured, and the phenomenon that the air conditioner is unstable or the refrigerating or heating effect of the air conditioner is influenced due to frequent adjustment of the fan frequency is prevented.
In a scenario of this embodiment, the air conditioner external unit may also be protected by turning off the compressor. The method comprises the following steps: judging whether the input voltage is smaller than a first voltage threshold, wherein the first voltage threshold is the lowest working voltage of an air conditioner outdoor unit; and if the input voltage is less than the first voltage threshold, closing the compressor.
Through closing the compressor, can prevent that the outer machine of air conditioner from moving under extreme condition and components and parts that cause damage to reduce the life of air conditioner, after closing the compressor, can also export the prompt message, remind the user
Optionally, detecting the input voltage of the IPM module includes: collecting voltage values at two ends of a sampling resistor, wherein the sampling resistor is arranged at the input side of alternating voltage of the IPM module; converting the voltage value into an electrical signal; and amplifying the electric signal by using a linear amplifier to obtain an input voltage.
An input voltage detection unit can be arranged on an input side of alternating voltage of the IPM module and used for detecting the size of the input voltage, the input voltage can be detected in a sampling resistor adding and operational amplifier mode, electric signals which are output by two ends of a sampling resistor and are in direct proportion to input voltage values are input to a linear amplifier, and the electric signals are amplified by the linear amplifier and then transmitted to a control chip to obtain input voltage data. Therefore, conversion from analog signals to digital signals is achieved, the digital signals are input to the processor for centralized processing, and processing efficiency is improved.
Fig. 3 is a system structure diagram of an embodiment of the present invention, which includes an input voltage detection unit, a variable frequency control chip, and an outer loop temperature detection unit, and when the system is in operation, the input voltage is monitored in real time according to the input voltage detection unit connected to the ac voltage input side, and the external machine environment temperature is detected in real time according to the outer loop temperature detection unit of the external machine, if it is determined that the outdoor environment temperature is high and the input voltage is low, the current increases and the module temperature increases under a certain power condition, and the external machine is controlled to run faster, so as to perform fan frequency control for dissipating heat from the module, thereby implementing IPM module temperature control, and avoiding limitation caused by module temperature increase under a severe working condition.
FIG. 4 is a flow chart of system control logic according to an embodiment of the present invention, including:
s41, after the external machine is started, the input voltage detection unit collects the voltage of the alternating current input end, the outer ring temperature detection unit detects the outer ring temperature, and the collected signals are transmitted to the control chip and then transmitted to the control chip;
s42, comparing the real-time input voltage with preset voltage values Umin1 and Umin2, judging whether the value of delta t is less than 8 ℃, and then controlling the running frequency of the fan S43, wherein the specific logic comprises the following steps:
s431, if Δ t is less than 8 ℃, and ac input voltage Umin1, Uin ═ Umin2, then the outer ring temperature is considered to be high temperature, the input voltage is low voltage, but the system can also normally operate, and in order to radiate heat to the module, the fan is controlled to operate at FA frequency;
s432, if delta t is less than 8 ℃, and the alternating-current input voltage Uin is equal to Umin1, the outer ring temperature is considered to be high temperature at the moment, the input voltage is the lowest allowable input voltage of the unit, the temperature rise of the module is more serious at the moment, in order to ensure the stable operation of the system, the fan is controlled to operate at the frequency FB, and the frequency FB > FA > F is in a normal working condition;
and S433, if delta t is less than 8 ℃, and the alternating-current input voltage Uin is less than Umin1, the outer ring temperature is considered to be high temperature at the moment, and under the input voltage, the unit cannot normally operate, a driving signal of the compressor IPM module is immediately turned off, such as a Pulse Width Modulation (PWM) signal, an input voltage too low fault is reported, and a user is indicated to check whether a power grid connected with the unit is normal.
By adopting the scheme of the embodiment, the temperature of the IPM module can be ensured not to trigger the system drop limiting frequency point when the air-cooled heat dissipation unit operates under the severe working condition, so that the system can continuously refrigerate, the IPM heat dissipation unit is suitable for air-cooled heat dissipation units, the stable operation of the system is protected, the compressor IPM module is protected from being burnt due to overheating, the temperature rise of an electric control component under the severe working condition is reduced, the service life of the component is prolonged, the damage of the module due to the overheating of the compressor IPM module under the severe working condition is avoided, and the working reliability of the compressor; the problem of component temperature rise caused by excessive heating of the IPM module of the compressor under severe working conditions is avoided, the service life of the whole machine is prolonged, frequent protection of the compressor is avoided, air conditioner operation is not consistent, and customer experience is influenced.
Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal device (such as a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.
Example 2
In this embodiment, a control device of a fan and an air conditioner external unit are further provided for implementing the above embodiments and preferred embodiments, which have already been described and will not be described again. As used below, the term "module" may be a combination of software and/or hardware that implements a predetermined function. Although the means described in the embodiments below are preferably implemented in software, an implementation in hardware, or a combination of software and hardware is also possible and contemplated.
The embodiment provides a control device of a fan, and fig. 5 is a block diagram of a control device of a fan according to an embodiment of the present invention, where the control device includes: a detection module 50, a first control module 52, wherein,
the detection module 50 is configured to detect an input voltage of an intelligent power module IPM module and an outer ring temperature of an air conditioner external unit, where the IPM module is integrated on a compressor of the air conditioner external unit;
a first control module 52 configured to control a fan frequency of the compressor according to the input voltage and the outer loop temperature.
Optionally, the first control module includes: the first judging unit is used for judging whether the outer ring temperature meets a first preset condition or not, wherein the first preset condition is used for representing that the air conditioner outdoor unit operates in a high-temperature state; the second judging unit is used for judging whether the input voltage meets a second preset condition or not if the outer ring temperature meets a first preset condition, wherein the second preset condition is used for representing that the air conditioner outdoor unit operates in a low-voltage state; the first control unit is used for controlling the compressor to increase the current fan frequency to a first fan frequency if the input voltage does not meet a second preset condition; and if the input voltage meets a second preset condition, controlling the compressor to increase the current fan frequency to a second fan frequency, wherein the second fan frequency is greater than the first fan frequency.
Optionally, the first determining unit includes: the calculation subunit is configured to calculate a temperature difference between a temperature threshold and the outer ring temperature, where the temperature threshold is a maximum working temperature of the air conditioner external unit; the judging subunit is used for judging whether the temperature difference is smaller than a preset value; the determining subunit is used for determining that the outer ring temperature meets a first preset condition if the temperature difference is smaller than a preset value; and if the temperature difference is greater than or equal to a preset value, determining that the outer ring temperature does not meet a first preset condition.
Optionally, the second judging unit includes: the comparison subunit is configured to compare the input voltage with a first voltage threshold, and compare the input voltage with a second voltage threshold, where the first voltage threshold is a lowest operating voltage of the air conditioner external unit, and the second voltage threshold is a rated voltage of the air conditioner external unit; the judging subunit is used for judging whether the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold; determining a unit element, configured to determine that the input voltage does not satisfy a second preset condition if the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold; and if the input voltage is equal to the first voltage threshold, determining that the input voltage meets a second preset condition.
Optionally, the first control module further includes: and the second control unit is used for controlling the compressor to maintain the current fan frequency if the outer ring temperature does not meet the first preset condition.
Optionally, the apparatus further comprises: the judging module is used for judging whether the input voltage is smaller than a first voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit; and the second control module is used for closing the compressor if the input voltage is smaller than the first voltage threshold.
Optionally, the detection module includes: the sampling unit is used for collecting voltage values at two ends of a sampling resistor, wherein the sampling resistor is arranged at the input side of alternating-current voltage of the IPM module; the conversion unit is used for converting the voltage value into an electric signal; and the amplifying unit is used for amplifying the electric signal by adopting a linear amplifier to obtain the input voltage.
The embodiment also provides an outdoor unit of an air conditioner, which comprises a compressor and a controller, wherein the controller comprises the device described in the embodiment.
It should be noted that, the above modules may be implemented by software or hardware, and for the latter, the following may be implemented, but not limited to: the modules are all positioned in the same processor; alternatively, the modules are respectively located in different processors in any combination.
Example 3
Embodiments of the present invention also provide a storage medium having a computer program stored therein, wherein the computer program is arranged to perform the steps of any of the above method embodiments when executed.
Alternatively, in an aspect of the present embodiment, the storage medium may be configured to store a computer program for executing the steps of:
s1, detecting the input voltage of an intelligent power module IPM module and the outer ring temperature of an air conditioner outer unit, wherein the IPM module is integrated on a compressor of the air conditioner outer unit;
and S2, controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
Optionally, in this embodiment, the storage medium may include, but is not limited to: various media capable of storing computer programs, such as a usb disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic disk, or an optical disk.
Embodiments of the present invention also provide an electronic device comprising a memory having a computer program stored therein and a processor arranged to run the computer program to perform the steps of any of the above method embodiments.
Optionally, the electronic apparatus may further include a transmission device and an input/output device, wherein the transmission device is connected to the processor, and the input/output device is connected to the processor.
Optionally, in an aspect of this embodiment, the processor may be configured to execute the following steps by a computer program:
s1, detecting the input voltage of an intelligent power module IPM module and the outer ring temperature of an air conditioner outer unit, wherein the IPM module is integrated on a compressor of the air conditioner outer unit;
and S2, controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation manners, and this embodiment is not described herein again.
It will be apparent to those skilled in the art that the modules or steps of the present invention described above may be implemented by a general purpose computing device, they may be centralized on a single computing device or distributed across a network of multiple computing devices, and alternatively, they may be implemented by program code executable by a computing device, such that they may be stored in a storage device and executed by a computing device, and in some cases, the steps shown or described may be performed in an order different than that described herein, or they may be separately fabricated into individual integrated circuit modules, or multiple ones of them may be fabricated into a single integrated circuit module. Thus, the present invention is not limited to any specific combination of hardware and software.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the principle of the present invention should be included in the protection scope of the present invention.
Claims (11)
1. A control method of a fan is characterized by comprising the following steps:
detecting input voltage of an intelligent power module IPM module and outer ring temperature of an air conditioner outer unit, wherein the IPM module is integrated on a compressor of the air conditioner outer unit;
and controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
2. The method of claim 1, wherein controlling the fan frequency of the compressor based on the input voltage and the outer loop temperature comprises:
judging whether the outer ring temperature meets a first preset condition or not, wherein the first preset condition is used for representing that the air conditioner external unit operates in a high-temperature state;
if the outer ring temperature meets a first preset condition, judging whether the input voltage meets a second preset condition, wherein the second preset condition is used for representing that the air conditioner outer unit operates in a low-voltage state;
if the input voltage does not meet a second preset condition, controlling the compressor to increase the current fan frequency to a first fan frequency; and if the input voltage meets a second preset condition, controlling the compressor to increase the current fan frequency to a second fan frequency, wherein the second fan frequency is greater than the first fan frequency.
3. The method of claim 2, wherein determining whether the outer loop temperature satisfies a first predetermined condition comprises:
calculating the temperature difference of subtracting the outer ring temperature from a temperature threshold, wherein the temperature threshold is the maximum working temperature of the air conditioner external unit;
judging whether the temperature difference is smaller than a preset value or not;
if the temperature difference is smaller than a preset value, determining that the temperature of the outer ring meets a first preset condition; and if the temperature difference is greater than or equal to a preset value, determining that the outer ring temperature does not meet a first preset condition.
4. The method of claim 2, wherein determining whether the input voltage satisfies a second predetermined condition comprises:
comparing the input voltage with a first voltage threshold, and comparing the input voltage with a second voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit, and the second voltage threshold is the rated voltage of the air conditioner outdoor unit;
judging whether the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold;
if the input voltage is less than or equal to the second voltage threshold and greater than the first voltage threshold, determining that the input voltage does not meet a second preset condition; and if the input voltage is equal to the first voltage threshold, determining that the input voltage meets a second preset condition.
5. The method of claim 2, further comprising:
and if the outer ring temperature does not meet a first preset condition, controlling the compressor to maintain the current fan frequency.
6. The method of claim 1, further comprising:
judging whether the input voltage is smaller than a first voltage threshold, wherein the first voltage threshold is the lowest working voltage of the air conditioner outdoor unit;
and if the input voltage is less than the first voltage threshold, closing the compressor.
7. The method of claim 1, wherein detecting the input voltage of the IPM module comprises:
collecting voltage values at two ends of a sampling resistor, wherein the sampling resistor is arranged at the input side of alternating-current voltage of the IPM module;
converting the voltage value into an electrical signal;
and amplifying the electric signal by using a linear amplifier to obtain the input voltage.
8. A control device of a fan, comprising:
the detection module is used for detecting the input voltage of the intelligent power module IPM module and the outer ring temperature of the air conditioner external unit, wherein the IPM module is integrated on a compressor of the air conditioner external unit;
and the first control module is used for controlling the fan frequency of the compressor according to the input voltage and the outer ring temperature.
9. An outdoor unit for an air conditioner, comprising a compressor and a controller, wherein the controller comprises the apparatus of claim 8.
10. A storage medium, in which a computer program is stored, wherein the computer program is arranged to perform the method of any of claims 1 to 7 when executed.
11. An electronic device comprising a memory and a processor, wherein the memory has stored therein a computer program, and wherein the processor is arranged to execute the computer program to perform the method of any of claims 1 to 7.
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Cited By (1)
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| CN112710072A (en) * | 2020-12-29 | 2021-04-27 | 宁波奥克斯电气股份有限公司 | Outdoor unit temperature control method and device and air conditioner |
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| CN111780381B (en) | 2021-08-03 |
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