CN112128889B - External fan control method of photovoltaic air conditioning unit - Google Patents

External fan control method of photovoltaic air conditioning unit Download PDF

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Publication number
CN112128889B
CN112128889B CN202010898149.1A CN202010898149A CN112128889B CN 112128889 B CN112128889 B CN 112128889B CN 202010898149 A CN202010898149 A CN 202010898149A CN 112128889 B CN112128889 B CN 112128889B
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rotating speed
preset
fan
main fan
frequency
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CN112128889A (en
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肖克强
张蕾
宁贻江
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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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
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • 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
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
    • F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
    • F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0046—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground
    • F24F2005/0064—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater using natural energy, e.g. solar energy, energy from the ground using solar energy
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Signal Processing (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Fluid Mechanics (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention belongs to the technical field of air conditioners, and particularly provides an external fan control method of a photovoltaic air conditioning unit. The invention aims to solve the problem that the existing outdoor unit fan is difficult to simultaneously consider both the heat exchange effect and the power consumption. To this end, the external fan control method of the present invention includes: acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit; selectively acquiring the operating frequency of the variable frequency compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; under the condition of obtaining the operating frequency of the variable frequency compressor, determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable frequency compressor; under the condition that the operating frequency of the variable frequency compressor is not obtained, determining the operating rotating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; and controlling the actual running rotating speed of the main fan and the solar fan according to the determined running rotating speed of the main fan so as to simultaneously take account of the heat exchange effect of the outdoor unit and the power consumption of the air conditioning unit.

Description

External fan control method of photovoltaic air conditioning unit
Technical Field
The invention belongs to the technical field of air conditioners, and particularly provides an external fan control method of a photovoltaic air conditioning unit.
Background
With the continuous development of air conditioning technology, users also put forward higher and higher requirements on the comprehensive performance of the air conditioning unit, particularly the energy consumption requirement of the air conditioning unit. In recent years, technicians have proposed various schemes for effectively improving the heat exchange effect of the air conditioning unit and simultaneously reducing the power consumption of the air conditioning unit, but it is still difficult to simultaneously consider both the heat exchange effect and the power consumption. Specifically, in order to effectively improve the heat dissipation effect of the outdoor unit and further improve the refrigerant conversion rate of the outdoor unit, two fans are configured for the outdoor unit in the existing part of the air conditioning unit, and although the heat exchange effect of the air conditioning unit can be effectively improved by the mode, the two fans need to be powered by a household power supply, so that the power saving effect cannot be achieved; or, the solar fan is adopted in the existing part of outdoor units, and although the mode can achieve the power saving effect, the heat dissipation effect of the outdoor units is often difficult to guarantee only by the solar fan for heat dissipation, so that the problem of poor user experience is caused.
Accordingly, there is a need in the art for a new external fan control method for a photovoltaic air conditioning unit to solve the above problems.
Disclosure of Invention
In order to solve the above problems in the prior art, that is, to solve the problem that the existing outdoor unit fan is difficult to simultaneously consider both the heat exchange effect and the power consumption, the present invention provides an external fan control method for a photovoltaic air conditioning unit, wherein the photovoltaic air conditioning unit includes an outdoor unit, the outdoor unit includes a variable frequency compressor, an outdoor heat exchanger, a main fan and a solar fan, the main fan and the solar fan are respectively arranged on two sides of the outdoor heat exchanger, and the external fan control method includes: acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit; selectively acquiring the operating frequency of the variable-frequency compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; under the condition of obtaining the operating frequency of the variable frequency compressor, determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable frequency compressor; under the condition that the operating frequency of the variable frequency compressor is not obtained, determining the operating rotating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; and controlling the actual running rotating speeds of the main fan and the solar fan according to the determined running rotating speed of the main fan.
In a preferred technical solution of the above-mentioned external fan control method, "selectively obtaining the operating frequency of the inverter compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit" specifically includes: under the condition that the photovoltaic air conditioning unit operates in a refrigeration mode, if the outdoor temperature is lower than a first refrigeration preset temperature, acquiring the operating frequency of the variable frequency compressor; under the condition that the photovoltaic air conditioning unit operates in the refrigeration mode, the step of determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable-frequency compressor specifically comprises the following steps: if the outdoor temperature is less than or equal to a second refrigeration preset temperature, determining that the rotating speed of the main fan is a first preset rotating speed when the operating frequency of the variable frequency compressor is less than a first preset frequency, determining that the rotating speed of the main fan is a second preset rotating speed when the operating frequency of the variable frequency compressor is greater than or equal to the first preset frequency and less than or equal to a second preset frequency, and determining that the rotating speed of the main fan is a third preset rotating speed when the operating frequency of the variable frequency compressor is greater than the second preset frequency; if the outdoor temperature is higher than the second refrigeration preset temperature and lower than the first refrigeration preset temperature, determining that the rotating speed of the main fan is the second preset rotating speed when the operating frequency of the variable frequency compressor is lower than the first preset frequency, determining that the rotating speed of the main fan is the third preset rotating speed when the operating frequency of the variable frequency compressor is higher than or equal to the first preset frequency and lower than or equal to the second preset frequency, and determining that the rotating speed of the main fan is the fourth preset rotating speed when the operating frequency of the variable frequency compressor is higher than the second preset frequency; the first preset rotating speed is less than the second preset rotating speed, and the third preset rotating speed is less than the fourth preset rotating speed.
In a preferred technical solution of the above-mentioned external fan control method, in a case where the photovoltaic air conditioning unit operates in the cooling mode, the step of "determining the operating rotation speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit" specifically includes: and if the outdoor temperature is greater than or equal to the first refrigeration preset temperature, determining the rotating speed of the main fan to be the fourth preset rotating speed.
In the above preferred technical solution of the external fan control method, "controlling the actual operating speeds of the main fan and the solar fan according to the determined operating speed of the main fan" specifically includes: further acquiring the electric quantity of the solar fan, and if the determined operation rotating speed of the main fan is less than the first preset rotating speed and the electric quantity of the solar fan is greater than the first preset electric quantity, controlling the main fan to stop rotating and controlling the solar fan to rotate at the determined operation rotating speed of the main fan; and/or if the determined operation rotating speed of the main fan is greater than or equal to the first preset rotating speed and less than or equal to the third preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a first correction rotating speed from the determined operation rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the first correction rotating speed by a first correction coefficient; and/or if the determined running rotating speed of the main fan is greater than the third preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a second correction rotating speed from the determined running rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the second correction rotating speed by a second correction coefficient; wherein the first correction coefficient is smaller than the second correction coefficient.
In a preferred technical solution of the above-mentioned external fan control method, "selectively obtaining the operating frequency of the inverter compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit" specifically includes: under the condition that the photovoltaic air conditioning unit operates in a heating mode, if the outdoor temperature is lower than a first heating preset temperature, acquiring the operating frequency of the variable frequency compressor; under the condition that the photovoltaic air conditioning unit operates in the heating mode, the step of determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable-frequency compressor specifically comprises the following steps: if the outdoor temperature is less than or equal to a second heating preset temperature, determining that the rotating speed of the main fan is a fifth preset rotating speed when the operating frequency of the inverter compressor is less than a third preset frequency, and determining that the rotating speed of the main fan is a sixth preset rotating speed when the operating frequency of the inverter compressor is greater than or equal to the third preset frequency; if the outdoor temperature is higher than the second heating preset temperature and lower than the first heating preset temperature, determining that the rotating speed of the main fan is a seventh preset rotating speed when the operating frequency of the inverter compressor is lower than the third preset frequency, determining that the rotating speed of the main fan is a fifth preset rotating speed when the operating frequency of the inverter compressor is higher than or equal to the third preset frequency and lower than or equal to a fourth preset frequency, and determining that the rotating speed of the main fan is a sixth preset rotating speed when the operating frequency of the inverter compressor is higher than the fourth preset frequency; wherein the seventh preset rotating speed is less than the fifth preset rotating speed and less than the sixth preset rotating speed.
In a preferred technical solution of the above-mentioned external fan control method, in a case where the photovoltaic air conditioning unit operates in a heating mode, the step of "determining the operating rotation speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit" specifically includes: if the outdoor temperature is greater than or equal to the first heating preset temperature, determining that the rotating speed of the main fan is an eighth preset rotating speed; wherein the eighth preset rotating speed is less than the seventh preset rotating speed.
In the above preferred technical solution of the external fan control method, "controlling the actual operating speeds of the main fan and the solar fan according to the determined operating speed of the main fan" specifically includes: further acquiring the electric quantity of the solar fan, and if the determined operation rotating speed of the main fan is less than the eighth preset rotating speed and the electric quantity of the solar fan is greater than a second preset electric quantity, controlling the main fan to stop rotating and controlling the solar fan to rotate at the determined operation rotating speed of the main fan; and/or if the determined operating rotating speed of the main fan is greater than or equal to the eighth preset rotating speed and less than or equal to the fifth preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a third correction rotating speed from the determined operating rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the third correction rotating speed by a third correction coefficient; and/or if the determined running rotating speed of the main fan is greater than the fifth preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a fourth correction rotating speed from the determined running rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the fourth correction rotating speed by a fourth correction coefficient; wherein the third correction coefficient is smaller than the fourth correction coefficient.
In a preferred technical solution of the above-mentioned external fan control method, in a case that the photovoltaic air conditioning unit operates in a defrosting mode, the external fan control method further includes: when the main fan stops rotating, the solar fan is controlled to stop rotating; and when the main fan starts to rotate, controlling the solar fan to start to rotate.
In a preferred embodiment of the above-described outer fan control method, the outer fan control method further includes: when the electric quantity of the solar fan is smaller than a third preset electric quantity, controlling the solar fan to stop rotating, controlling the rotating speed of the main fan to increase by a first preset amplitude, and then controlling the rotating speed of the main fan to decrease by a second preset amplitude every first preset time period until the rotating speed of the main fan is decreased to the rotating speed before the increase; wherein the second preset amplitude is smaller than the first preset amplitude.
In a preferred embodiment of the above-described outer fan control method, the outer fan control method further includes: and under the condition that the solar fan breaks down, controlling the main fan to rotate at the determined running rotating speed of the main fan.
As can be understood by those skilled in the art, in the technical solution of the present invention, the photovoltaic air conditioning unit includes an outdoor unit, the outdoor unit includes a variable frequency compressor, an outdoor heat exchanger, a main fan and a solar fan, the main fan and the solar fan are respectively disposed on two sides of the outdoor heat exchanger, and the external fan control method of the present invention includes: acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit; selectively acquiring the operating frequency of the variable-frequency compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; under the condition of obtaining the operating frequency of the variable frequency compressor, determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable frequency compressor; under the condition that the operating frequency of the variable frequency compressor is not obtained, determining the operating rotating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; and controlling the actual running rotating speeds of the main fan and the solar fan according to the determined running rotating speed of the main fan. The operating speed of the main fan is determined according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit and by selectively combining the operating frequency of the variable frequency compressor, so that the heat exchange efficiency of the outdoor heat exchanger is effectively ensured; after the operation rotating speed of the main fan is determined, the actual operation rotating speeds of the main fan and the solar fan are controlled through the determined operation rotating speed of the main fan, so that the heat dissipation effect of the outdoor unit can be effectively guaranteed, the power saving effect can be effectively achieved, and the user experience is greatly improved.
Drawings
Fig. 1 is an internal structure view of an outdoor unit of a photovoltaic air conditioning unit according to the present invention;
FIG. 2 is a flow chart of the steps of the external fan control method of the present invention;
FIG. 3 is a flowchart of the detailed steps of the first preferred embodiment of the present invention;
FIG. 4 is a flowchart of the detailed steps of a second preferred embodiment of the present invention;
reference numerals:
11. an outdoor unit;
111. a variable frequency compressor; 112. an outdoor heat exchanger; 113. a main fan; 114. a solar fan.
Detailed Description
Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and are not intended to limit the scope of the present invention. And can be adjusted as needed by those skilled in the art to suit particular applications. It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "left", "right", "inside", "outside", etc. are based on the directions or positional relationships shown in the drawings, which are merely for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. In the description of the present invention, unless otherwise expressly specified or limited, the term "coupled" is to be construed broadly, e.g., as meaning directly coupled to or indirectly coupled through an intermediate member, or as meaning a communication between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Further, it should be noted that in the description of the present invention, although the steps of the control method of the present invention are described in a specific order in the present application, the order is not limited, and those skilled in the art may perform the steps in a different order without departing from the basic principle of the present invention. The terms "first," "second," "third," "fourth," "fifth," "sixth," "seventh," and "eighth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Referring first to fig. 1, the inside structure of an outdoor unit of a photovoltaic air conditioning unit according to the present invention is shown. Specifically, the photovoltaic air conditioning unit of the present invention includes a refrigerant circulation loop (not shown in the figure), and an indoor unit (not shown in the figure) and an outdoor unit 11 disposed on the refrigerant circulation loop, where the indoor unit and the outdoor unit 11 realize heat exchange through the refrigerant circulation loop, so as to change an indoor temperature to meet a heat exchange requirement of a user. It should be noted that, the present invention does not limit the specific arrangement manner of the refrigerant circulation circuit, as long as the indoor unit and the outdoor unit 11 realize heat exchange through the refrigerant circulation circuit. Further, as shown in fig. 1, the outdoor unit 11 includes an inverter compressor 111, an outdoor heat exchanger 112, a main fan 113, and a solar fan 114; the inverter compressor 111 and the outdoor heat exchanger 112 are disposed on the refrigerant circulation loop for realizing refrigerant circulation, and the main fan 113 and the solar fan 114 are disposed on the left and right sides of the outdoor heat exchanger 112 respectively for assisting the outdoor heat exchanger 112 in heat exchange. The main fan 113 is powered by the power supply of the photovoltaic air conditioning unit, and the solar fan 114 is powered by the solar storage battery. It should be noted that, the present invention does not limit the specific structure of the photovoltaic air conditioning unit, as long as the outdoor unit 11 includes the inverter compressor 111, the outdoor heat exchanger 112, the main fan 113 and the solar fan 114, and the main fan 113 and the solar fan 114 are respectively disposed at the left and right sides of the outdoor heat exchanger 112. Changes in this detailed construction can be made without departing from the basic principles of the invention and are intended to be within the scope of the invention.
In addition, it should be noted that the present invention does not limit the specific types of the main fan 113 and the solar fan 114, and the technical personnel can select the types according to the actual use requirement; moreover, the solar storage battery for supplying power to the solar fan 114 may belong to the photovoltaic air conditioning unit or may be an external component of the photovoltaic air conditioning unit, and a technician may set the solar storage battery according to actual use requirements.
In addition, the photovoltaic air conditioning unit further comprises a controller, the controller can acquire the outdoor temperature, the operation mode of the photovoltaic air conditioning unit, the operation frequency of the inverter compressor 111 and the electric quantity of the solar storage battery, and the controller can also control the operation rotating speeds of the main fan 113 and the solar fan 114. The photovoltaic air conditioning unit is at least provided with a refrigeration mode, a heating mode and a defrosting mode, and of course, the photovoltaic air conditioning unit can also be provided with other modes, and technicians can set the modes according to actual use requirements. It can be understood by those skilled in the art that the present invention does not limit the specific structure and model of the controller, and the controller may be the original controller of the photovoltaic air conditioning unit, or may be a controller separately configured to execute the external fan control method of the present invention, and the skilled person may set the specific structure and model of the controller according to the actual use requirement.
Referring next to fig. 2, fig. 2 is a flow chart illustrating the steps of the external fan control method of the present invention. As shown in fig. 2, based on the photovoltaic air conditioning unit described in the above embodiment, the external fan control method of the present invention mainly includes the following steps:
s1: acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit;
s2: selectively acquiring the operating frequency of the variable frequency compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit;
s3: under the condition of obtaining the operating frequency of the variable frequency compressor, determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable frequency compressor;
s4: under the condition that the operating frequency of the variable frequency compressor is not obtained, determining the operating rotating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit;
s5: and controlling the actual running rotating speeds of the main fan and the solar fan according to the determined running rotating speed of the main fan.
In step S1, the controller is capable of obtaining the outdoor temperature and the operation mode of the photovoltaic air conditioning unit; it can be understood that the controller can acquire the outdoor temperature through an outdoor temperature sensor arranged in the photovoltaic air conditioning unit, can acquire the outdoor temperature through an external outdoor temperature sensor, and can even acquire the outdoor temperature in a networking manner. In addition, it should be noted that the present invention does not limit the specific obtaining sequence of the two parameters, and the technical personnel can set the sequence according to the actual using requirement; for example, the controller may obtain the outdoor temperature first, may obtain the operation mode of the photovoltaic air conditioning unit first, or may obtain the outdoor temperature and the operation mode of the photovoltaic air conditioning unit at the same time. Such a change of the acquisition sequence does not depart from the basic principle of the present invention and belongs to the protection scope of the present invention.
In step S2, the controller selectively obtains the operating frequency of the inverter compressor 111 according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit; it should be noted that, the specific determination condition used in step S2 is not limited in the present invention, and a technician may set the determination condition according to actual requirements, and it is within the protection scope of the present invention as long as the controller determines whether to obtain the operation frequency of the inverter compressor 111 according to the outdoor temperature and the operation mode of the photovoltaic air conditioning unit.
Based on the judgment result of the step S2, in the case of obtaining the operation frequency of the inverter compressor 111, executing a step S3, that is, the controller determines the operation rotation speed of the main fan 113 according to the outdoor temperature, the operation mode of the photovoltaic air conditioning unit and the operation frequency of the inverter compressor 111; in the case that the operation frequency of the inverter compressor 111 is not obtained, step S4 is executed, that is, the controller determines the operation speed of the main fan 113 according to the outdoor temperature and the operation mode of the pv air conditioning unit. It should be noted that, the specific determination manner used in step S3 and step S4 is not limited in any way, and a technician may set the determination manner according to actual needs, as long as the controller determines the operation rotation speed of the main fan 113 according to the outdoor temperature, the operation mode of the photovoltaic air conditioning unit, and the operation frequency of the inverter compressor when the operation frequency of the inverter compressor 111 is obtained, and the controller determines the operation rotation speed of the main fan 113 according to the outdoor temperature and the operation mode of the photovoltaic air conditioning unit when the operation frequency of the inverter compressor 111 is not obtained, which belongs to the protection scope of the present invention.
In step S5, the controller controls the actual operating speeds of the main fan 113 and the solar fan 114 according to the determined operating speed of the main fan 113; it should be noted that, the present invention does not limit the control manner used in step S5, and a technician may set the control manner according to actual requirements, and it is within the protection scope of the present invention as long as the controller controls the actual operating speeds of the main fan 113 and the solar fan 114 according to the determined operating speed of the main fan 113.
Reference is now made to fig. 3, which is a flowchart illustrating the steps involved in a first preferred embodiment of the present invention. As shown in fig. 3, based on the photovoltaic air conditioning unit described in the above embodiment, a first preferred embodiment of the present invention specifically includes the following steps:
s101: acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit;
s102: judging whether the outdoor temperature is lower than a first refrigeration preset temperature or not; if yes, executing step S104; if not, executing step S103;
s103: determining the rotating speed of the main fan as a fourth preset rotating speed;
s104: acquiring the operating frequency of the variable frequency compressor;
s105: judging whether the outdoor temperature is less than or equal to a second refrigeration preset temperature or not; if yes, executing step S106 to step S108; if not, executing step S109 to step S111;
s106: when the operating frequency is lower than a first preset frequency, determining the rotating speed of the main fan as a first preset rotating speed;
s107: when the operating frequency is greater than or equal to a first preset frequency and less than or equal to a second preset frequency, determining the rotating speed of the main fan to be a second preset rotating speed;
s108: when the operating frequency is higher than the second preset frequency, determining the rotating speed of the main fan as a third preset rotating speed;
s109: when the operating frequency is lower than the first preset frequency, determining the rotating speed of the main fan as a second preset rotating speed;
s110: when the operating frequency is greater than or equal to a first preset frequency and less than or equal to a second preset frequency, determining the rotating speed of the main fan to be a third preset rotating speed;
s111: when the operating frequency is higher than the second preset frequency, determining the rotating speed of the main fan to be a fourth preset rotating speed;
s112: controlling the actual operating rotating speeds of the main fan and the solar fan according to the determined operating rotating speed of the main fan;
s1121: if the determined operation rotating speed of the main fan is less than a first preset rotating speed and the electric quantity of the solar fan is greater than a first preset electric quantity, controlling the main fan to stop rotating and controlling the solar fan to rotate at the determined operation rotating speed;
s1122: if the determined operation rotating speed of the main fan is greater than or equal to the first preset rotating speed and less than or equal to the third preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting the first correction rotating speed from the determined operation rotating speed of the main fan, and controlling the solar fan to rotate at a rotating speed obtained by multiplying the first correction rotating speed by the first correction coefficient;
s1123: and if the determined running rotating speed of the main fan is greater than a third preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting the second correction rotating speed from the determined running rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the second correction rotating speed by the second correction coefficient.
If the operation mode of the photovoltaic air conditioning unit acquired in step S101 is the cooling mode, step S102 is executed, that is, all the following steps are based on the premise that the operation mode of the photovoltaic air conditioning unit acquired in step S101 is the cooling mode. In step S102, the controller is capable of determining whether the outdoor temperature is lower than the first preset cooling temperature; it should be noted that, the present invention does not limit the specific value of the first refrigeration preset temperature, and a technician can set the first refrigeration preset temperature according to the actual use requirement, and preferably, the first refrigeration preset temperature is 29 ℃.
Based on the judgment result of the step S102, when the outdoor temperature is greater than or equal to the first preset refrigeration temperature, the controller does not need to obtain the operating frequency of the inverter compressor 111, so as to effectively simplify the determination process of the rotation speed of the main fan 113, and directly executes the step S103, that is, when the operating mode of the photovoltaic air conditioning unit is the refrigeration mode and the outdoor temperature is greater than or equal to the first preset refrigeration temperature, the rotation speed of the main fan 113 is directly determined as the fourth preset rotation speed, which is preferably the maximum rotation speed of the main fan 113, so that the outdoor heat exchanger 112 can dissipate heat most effectively, thereby effectively ensuring the heat exchange efficiency of the outdoor unit 11, and further effectively ensuring the heat exchange efficiency of the whole air conditioning unit. It should be noted that, in the present invention, no limitation is imposed on the specific value of the fourth preset rotation speed, and a technician may set the rotation speed according to the actual situation of the main fan 113. Meanwhile, when the outdoor temperature is lower than the first refrigeration preset temperature, step S104 is executed, that is, the controller obtains the operating frequency of the inverter compressor 111, so as to effectively ensure the accuracy of the determination result.
Further, under the condition that the operation mode of the photovoltaic air conditioning unit is a refrigeration mode and the outdoor temperature is lower than the first refrigeration preset temperature, the controller determines the operation rotating speed of the main fan 113 according to the value range of the outdoor temperature and the value range of the variable frequency compressor 111, so that the determined operation rotating speed of the main fan 113 can always meet the heat exchange requirement of the outdoor heat exchanger 112, and the energy efficiency is effectively improved.
Correspondingly, in step S106, when the outdoor temperature is less than or equal to the second refrigeration preset temperature and when the operating frequency of the inverter compressor 111 is less than the first preset frequency, determining the rotation speed of the main fan 113 as the first preset rotation speed; it should be noted that, the present invention does not limit the specific value of the second preset refrigeration temperature, and a technician can set the second preset refrigeration temperature according to the actual use requirement, preferably, the second preset refrigeration temperature is 22 ℃.
Correspondingly, in step S107, when the outdoor temperature is less than or equal to the second refrigeration preset temperature and when the operating frequency of the inverter compressor 111 is greater than or equal to the first preset frequency and less than or equal to the second preset frequency, the rotation speed of the main fan 113 is determined as the second preset rotation speed. It should be noted that, the present invention does not limit the specific values of the first preset frequency and the second preset frequency, and a technician can set the values according to the specific conditions of the inverter compressor 111; as a preferable setting, the first preset frequency is set to 51Hz, and the second preset frequency is set to 70 Hz.
Correspondingly, in step S108, when the outdoor temperature is less than or equal to the second refrigeration preset temperature and when the operating frequency of the inverter compressor 111 is greater than the second preset frequency, the rotation speed of the main fan 113 is determined as the third preset rotation speed.
Correspondingly, in step S109, when the outdoor temperature is greater than the second refrigeration preset temperature and less than the first refrigeration preset temperature, and the operating frequency of the inverter compressor 111 is less than the first preset frequency, the rotation speed of the main fan 113 is determined as the second preset rotation speed.
Correspondingly, in step S110, when the outdoor temperature is greater than the second refrigeration preset temperature and less than the first refrigeration preset temperature, and the operating frequency of the inverter compressor 111 is greater than or equal to the first preset frequency and less than or equal to the second preset frequency, the rotation speed of the main fan 113 is determined as the third preset rotation speed.
Correspondingly, in step S111, when the outdoor temperature is greater than the second refrigeration preset temperature and less than the first refrigeration preset temperature, and the operating frequency of the inverter compressor 111 is greater than the second preset frequency, the rotation speed of the main fan 113 is determined as the fourth preset rotation speed.
It should be noted that, in the present invention, specific values of the first preset rotation speed, the second preset rotation speed, the third preset rotation speed, and the fourth preset rotation speed are not limited, and a technician may set the values according to the actual situation of the main fan 113, as long as the specific set values meet the relationship between the first preset rotation speed and the second preset rotation speed, and the third preset rotation speed and the fourth preset rotation speed.
As a preferable example, the main fan 113 is a fan with a maximum rotation speed of 1000r/min, in which case, the first preset rotation speed is set to 500r/min, the second preset rotation speed is set to 650r/min, the third preset rotation speed is set to 800r/min, and the fourth preset rotation speed is set to 1000 r/min. It can be understood that, as a preferable setting mode, when the maximum rotation speed of the main fan 113 is changed, the values of the first preset rotation speed, the second preset rotation speed, the third preset rotation speed, and the fourth preset rotation speed may also be adjusted with reference to the above ratio.
Further, after the operation rotation speed of the main fan 113 is determined based on the above steps, the controller controls the actual operation rotation speed of the main fan 113 and the actual operation rotation speed of the solar fan 114 according to the determined operation rotation speed of the main fan 113.
Specifically, in step S1121, the controller is capable of further acquiring the electric quantity of the solar fan 114, that is, further acquiring the electric quantity of the solar storage battery, the acquisition timing and the acquisition mode are not limited in the present invention, and a technician can set the acquisition timing according to the actual use requirement as long as the acquisition timing is before step S1121. If the determined operation rotating speed of the main fan 113 is less than the first preset rotating speed and the electric quantity of the solar fan 114 is greater than the first preset electric quantity, the main fan 113 is controlled to stop rotating and the solar fan 114 is controlled to rotate at the determined operation rotating speed of the main fan 113. It should be noted that, the specific value of the first preset electric quantity is not limited in any way, and a technician can set the value according to actual use requirements, preferably, the first preset electric quantity is set to be 75% of the total electric quantity; as an example, when the main fan 113 selects a fan with a maximum rotation speed of 1000r/min, if the determined operation rotation speed of the main fan 113 is 300r/min and the electric quantity of the solar fan 114 is greater than 75%, the controller controls the main fan 113 to stop rotating and controls the solar fan 114 to rotate at 300 r/min.
In step S1122, if the determined operating speed of the main fan 113 is greater than or equal to the first preset speed and less than or equal to the third preset speed, the main fan 113 is controlled to rotate at a speed obtained by subtracting the first correction speed from the determined operating speed of the main fan 113, and the solar fan 114 is controlled to rotate at a speed obtained by multiplying the first correction speed by the first correction coefficient, wherein the first correction coefficient is preferably a value greater than 1, so as to effectively ensure the heat dissipation effect of the outdoor unit 11. It should be noted that, the specific values of the first correction rotating speed and the first correction coefficient are not limited, and a technician can set the values according to actual use requirements; preferably, the first correction rotational speed is set to one tenth of the maximum rotational speed of the main fan 113, and the first correction coefficient is set to 2. As an example, when the main fan 113 selects a fan with a maximum rotation speed of 1000r/min, if the determined operation rotation speed of the main fan 113 is 650r/min, the controller controls the main fan 113 to rotate at 550r/min and controls the solar fan 114 to rotate at 200 r/min.
In step S1123, if the determined operating speed of the main fan 113 is greater than the third preset speed, the main fan 113 is controlled to rotate at a speed obtained by subtracting the second correction speed from the determined operating speed of the main fan 113, and the solar fan 114 is controlled to rotate at a speed obtained by multiplying the second correction speed by the second correction coefficient, wherein the second correction speed is preferably greater than the first correction speed, and the second correction coefficient is preferably a value greater than 1, and the first correction coefficient is smaller than the second correction coefficient, so as to effectively ensure the heat dissipation effect of the outdoor unit 11. It should be noted that, the specific values of the second correction rotating speed and the second correction coefficient are not limited, and a technician can set the values according to actual use requirements; preferably, the second correction coefficient is set to 3. Further, as an example, when the main fan 113 selects a fan having a maximum rotation speed of 1000r/min, if the determined operation rotation speed of the main fan 113 is 1000r/min, the controller controls the main fan 113 to rotate at 900r/min and controls the solar fan 114 to rotate at 300 r/min.
Reference is now made to fig. 4, which is a flowchart illustrating the steps involved in a second preferred embodiment of the present invention. As shown in fig. 4, based on the photovoltaic air conditioning unit described in the above embodiment, a second preferred embodiment of the present invention specifically includes the following steps:
s201: acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit;
s202: judging whether the outdoor temperature is lower than a first heating preset temperature or not; if yes, executing step S204; if not, executing step S203;
s203: determining the rotating speed of the main fan as an eighth preset rotating speed;
s204: acquiring the operating frequency of the variable frequency compressor;
s205: judging whether the outdoor temperature is less than or equal to a second heating preset temperature or not; if yes, executing step S206 and step S207; if not, executing step S208 to step S210;
s206: when the operating frequency is lower than a third preset frequency, determining the rotating speed of the main fan to be a fifth preset rotating speed;
s207: when the operating frequency is greater than or equal to a third preset frequency, determining the rotating speed of the main fan to be a sixth preset rotating speed;
s208: when the operating frequency is lower than the third preset frequency, determining the rotating speed of the main fan to be a seventh preset rotating speed;
s209: when the operating frequency is greater than or equal to a third preset frequency and less than or equal to a fourth preset frequency, determining the rotating speed of the main fan to be a fifth preset rotating speed;
s210: when the operating frequency is higher than the fourth preset frequency, determining the rotating speed of the main fan as a sixth preset rotating speed;
s211: controlling the actual operating rotating speeds of the main fan and the solar fan according to the determined operating rotating speed of the main fan;
s2111: if the determined operation rotating speed of the main fan is less than the eighth preset rotating speed and the electric quantity of the solar fan is greater than the second preset electric quantity, controlling the main fan to stop rotating and controlling the solar fan to rotate at the determined operation rotating speed of the main fan;
s2112: if the determined running rotating speed of the main fan is greater than or equal to the eighth preset rotating speed and less than or equal to the fifth preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting the third correction rotating speed from the determined running rotating speed of the main fan, and controlling the solar fan to rotate at a rotating speed obtained by multiplying the third correction rotating speed by the third correction coefficient;
s2113: and if the determined running rotating speed of the main fan is greater than the fifth preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting the fourth correction rotating speed from the determined running rotating speed of the main fan, and controlling the solar fan to rotate at a rotating speed obtained by multiplying the fourth correction rotating speed by the fourth correction coefficient.
Based on the fact that the operation mode of the photovoltaic air conditioning unit acquired in step S201 is the heating mode, step S202 is executed, that is, all the following steps are based on the premise that the operation mode of the photovoltaic air conditioning unit acquired in step S201 is the heating mode. In step S202, the controller is capable of determining whether the outdoor temperature is less than the first heating preset temperature; it should be noted that, the present invention does not limit the specific value of the first preset heating temperature, and a technician may set the first preset heating temperature according to actual use requirements, and preferably, the first preset heating temperature is 16 ℃.
Based on the judgment result of step S202, under the condition that the outdoor temperature is greater than or equal to the first heating preset temperature, the controller does not need to acquire the operating frequency of the inverter compressor 111, so as to effectively simplify the determination process of the rotation speed of the main fan 113, and directly executes step S203, that is, under the condition that the operating mode of the photovoltaic air conditioning unit is the heating mode and the outdoor temperature is greater than or equal to the first heating preset temperature, the rotation speed of the main fan 113 is directly determined as the eighth preset rotation speed, which is preferably the minimum rotation speed of the main fan 113, so that the heat dissipation effect is effectively ensured, and meanwhile, the energy consumption can be effectively saved. It should be noted that, the present invention does not limit the specific value of the eighth preset rotation speed, and the technician can set the value according to the actual situation of the main blower 113. Meanwhile, in the case that the outdoor temperature is lower than the first heating preset temperature, step S204 is executed, that is, the controller obtains the operating frequency of the inverter compressor 111, so as to effectively ensure the accuracy of the determination result.
Further, under the condition that the operation mode of the photovoltaic air conditioning unit is a heating mode and the outdoor temperature is lower than the first heating preset temperature, the controller determines the operation rotating speed of the main fan 113 according to the value range of the outdoor temperature and the value range of the inverter compressor 111, so that the determined operation rotating speed of the main fan 113 can always meet the heat exchange requirement of the outdoor heat exchanger 112, and therefore the energy efficiency is effectively improved.
Correspondingly, in step S206, when the outdoor temperature is less than or equal to the second heating preset temperature and when the operating frequency of the inverter compressor 111 is less than the third preset frequency, determining the rotation speed of the main fan 113 as the fifth preset rotation speed; it should be noted that, the present invention does not limit the value of the second preset heating temperature, and a technician can set the second preset heating temperature according to the actual use requirement, and the second preset heating temperature is preferably 10 ℃.
Correspondingly, in step S207, when the outdoor temperature is less than or equal to the second heating preset temperature and when the operating frequency of the inverter compressor 111 is greater than or equal to the third preset frequency, the rotation speed of the main fan 113 is determined as the sixth preset rotation speed. It should be noted that, the present invention does not limit the specific value of the third preset frequency, and a technician can set the third preset frequency according to the specific condition of the inverter compressor 111; as a preferable setting, the third preset frequency is set to 51 Hz.
Correspondingly, in step S208, when the outdoor temperature is greater than the second heating preset temperature and less than the first heating preset temperature, and the operating frequency of the inverter compressor 111 is less than the third preset frequency, the rotation speed of the main fan 113 is determined as the seventh preset rotation speed.
Correspondingly, in step S209, when the outdoor temperature is greater than the second heating preset temperature and less than the first heating preset temperature, and the operating frequency of the inverter compressor 111 is greater than or equal to the third preset frequency and less than or equal to the fourth preset frequency, the rotation speed of the main fan 113 is determined as the fifth preset rotation speed. In addition, it should be noted that, the present invention does not limit the specific value of the fourth preset frequency, and a technician can set the value according to the specific condition of the inverter compressor 111; as a preferable setting, the fourth preset frequency is set to 90 Hz.
Correspondingly, in step S210, when the outdoor temperature is greater than the second heating preset temperature and less than the first heating preset temperature, and the operating frequency of the inverter compressor 111 is greater than the fourth preset frequency, the rotation speed of the main fan 113 is determined as the sixth preset rotation speed, and the sixth preset rotation speed is preferably the maximum rotation speed of the main fan 113.
It should be noted that, in the present invention, no limitation is imposed on specific values of the fifth preset rotation speed, the sixth preset rotation speed, the seventh preset rotation speed, and the eighth preset rotation speed, and a technician may set the values according to the actual situation of the main fan 113, as long as the specific set values meet the relationship between the eighth preset rotation speed and the seventh preset rotation speed and the fifth preset rotation speed and the sixth preset rotation speed.
As a preferable example, the main fan 113 is a fan with a maximum rotation speed of 1000r/min, in which case, the fifth preset rotation speed is set to 800r/min, the sixth preset rotation speed is set to 1000r/min, the seventh preset rotation speed is set to 700r/min, and the eighth preset rotation speed is set to 500 r/min. It can be understood by those skilled in the art that, as a preferable setting manner, when the maximum rotation speed of the main fan 113 is changed, values of the fifth preset rotation speed, the sixth preset rotation speed, the seventh preset rotation speed, and the eighth preset rotation speed may also be adjusted with reference to the above ratio.
Further, after the operation rotation speed of the main fan 113 is determined based on the above steps, the controller controls the actual operation rotation speed of the main fan 113 and the actual operation rotation speed of the solar fan 114 according to the determined operation rotation speed of the main fan 113.
Specifically, in step S2111, the controller can further acquire the electric quantity of the solar fan 114, that is, the electric quantity of the solar storage battery, the acquisition timing and the acquisition mode are not limited in the present invention, and a technician can set the acquisition timing according to actual use requirements as long as the acquisition timing is before step S2111. And if the determined running rotating speed of the main fan 113 is less than the eighth preset rotating speed and the electric quantity of the solar fan 114 is greater than the second preset electric quantity, controlling the main fan 113 to stop rotating and controlling the solar fan 114 to rotate at the determined running rotating speed of the main fan 113. It should be noted that, the specific value of the second preset electric quantity is not limited in any way, and a technician can set the second preset electric quantity according to actual use requirements, preferably, the second preset electric quantity is set to be 75% of the total electric quantity; as an example, when the main fan 113 selects a fan with a maximum rotation speed of 1000r/min, if the determined operation rotation speed of the main fan 113 is 300r/min and the electric quantity of the solar fan 114 is greater than 75%, the controller controls the main fan 113 to stop rotating and controls the solar fan 114 to rotate at 300 r/min.
In step S2112, if the determined operating speed of the main fan 113 is greater than or equal to the eighth preset speed and less than or equal to the fifth preset speed, the main fan 113 is controlled to rotate at a speed obtained by subtracting the third correction speed from the determined operating speed of the main fan 113, and the solar fan 114 is controlled to rotate at a speed obtained by multiplying the third correction speed by the third correction coefficient, wherein the third correction coefficient is preferably a value greater than 1, so as to effectively ensure the heat dissipation effect of the outdoor unit 11. It should be noted that, in the present invention, no limitation is imposed on specific values of the third correction rotation speed and the third correction coefficient, and a technician can set the values according to actual use requirements; preferably, the third correction rotation speed is set to one tenth of the maximum rotation speed of the main fan 113, and the third correction coefficient is set to 2. As an example, when the main fan 113 selects a fan with a maximum rotation speed of 1000r/min, if the determined operation rotation speed of the main fan 113 is 650r/min, the controller controls the main fan 113 to rotate at 550r/min and controls the solar fan 114 to rotate at 200 r/min.
In step S2113, if the determined operating speed of the main fan 113 is greater than the fifth preset speed, the main fan 113 is controlled to rotate at a speed obtained by subtracting the fourth correction speed from the determined operating speed of the main fan 113, and the solar fan 114 is controlled to rotate at a speed obtained by multiplying the fourth correction speed by the fourth correction coefficient, wherein the fourth correction speed is preferably greater than the third correction speed, and the fourth correction coefficient is preferably a value greater than 1, and the third correction coefficient is smaller than the fourth correction coefficient, so as to effectively ensure the heat dissipation effect of the outdoor unit 11. It should be noted that, in the present invention, no limitation is imposed on specific values of the fourth correction rotation speed and the fourth correction coefficient, and a technician can set the values according to actual use requirements; preferably, the fourth correction coefficient is set to 3. Further, as an example, when the main fan 113 selects a fan having a maximum rotation speed of 1000r/min, if the determined operation rotation speed of the main fan 113 is 1000r/min, the controller controls the main fan 113 to rotate at 900r/min and controls the solar fan 114 to rotate at 300 r/min.
In addition, it should be noted that the two preferred embodiments can be used separately or combined, and the specific use manner can be changed without departing from the basic principle of the present invention, and the present invention shall fall into the protection scope.
While the above two preferred embodiments are performed, the control method of the present invention further includes: whether the solar fan 114 has a fault or not is acquired in real time, and under the condition that the solar fan 114 has the fault, the main fan 113 is controlled to rotate at the determined running rotating speed of the main fan 113, so that the heat dissipation effect of the outdoor unit 11 is effectively ensured. In addition, under the condition that the solar fan 114 has a fault, the photovoltaic air conditioning unit can also inform a user or a maintenance service background of the fault condition of the solar fan 114, so that maintenance personnel can timely maintain the solar fan 114; of course, the way of informing the user may be a voice broadcast way, may be a screen display through the indoor unit, and may also be directly sent to the mobile client of the user, which is not limited in this invention. In addition, it should be noted that the acquiring process may be performed in real time or at preset time intervals.
Further, under the condition that the photovoltaic air conditioning unit of the invention operates in the defrosting mode, the external fan control method of the invention further comprises the following steps: and controlling the running state of the solar fan 114 according to the running state of the main fan 113 so as to effectively ensure the defrosting effect of the photovoltaic air conditioning unit. Specifically, when the main fan 113 stops rotating, the solar fan 114 is controlled to also stop rotating; when the main fan 113 starts to rotate, the solar fan 114 is also controlled to start to rotate.
In addition, as a preferred embodiment, the controller may further obtain the electric quantity of the solar fan 114 in real time, that is, the electric quantity of the solar storage battery, so as to selectively control the solar fan 114 to stop rotating and increase the rotation speed of the main fan 113 according to the electric quantity of the solar fan 114, thereby effectively ensuring the heat dissipation effect of the outdoor unit 11, and further effectively ensuring the heat exchange efficiency of the whole air conditioning unit. It should be noted that, the process of acquiring the electric quantity may be real-time, or may be separated by a preset time, and the present invention is not limited to this.
Specifically, when the electric quantity of solar fan 114 is less than when the third predetermines the electric quantity, in order to effectively guarantee radiating reliability, controller control solar fan 114 stall to control main fan 113's rotational speed promotion first predetermined range, then control main fan 113's rotational speed every first predetermined duration reduces the second predetermined range reduces to the rotational speed before promoting until main fan 113's rotational speed to avoid receiving the problem that influences and lead to the internal pressure of air conditioning unit to appear fluctuating by a wide margin because of the radiating effect, and then effectively guarantee heat transfer process's stability. It should be noted that, the third preset electric quantity, the first preset duration, the first preset amplitude and the second preset amplitude are not limited in particular, and a technician can set the values according to actual use requirements as long as the second preset amplitude is smaller than the first preset amplitude; as a preferable setting, the third preset electric quantity is set to 35% of the total electric quantity, the first preset time is set to 30s, the first preset amplitude is set to three tenths of the maximum rotation speed of the main fan 113, and the second preset amplitude is one twentieth of the maximum rotation speed of the main fan 113.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.

Claims (10)

1. An external fan control method of a photovoltaic air conditioning unit is characterized in that the photovoltaic air conditioning unit comprises an outdoor unit, the outdoor unit comprises a variable frequency compressor, an outdoor heat exchanger, a main fan and a solar fan, the main fan and the solar fan are respectively arranged on two sides of the outdoor heat exchanger, and the external fan control method comprises the following steps:
acquiring an outdoor temperature and an operation mode of the photovoltaic air conditioning unit;
selectively acquiring the operating frequency of the variable-frequency compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit;
under the condition of obtaining the operating frequency of the variable frequency compressor, determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable frequency compressor;
under the condition that the operating frequency of the variable frequency compressor is not obtained, determining the operating rotating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit;
and controlling the actual running rotating speeds of the main fan and the solar fan according to the determined running rotating speed of the main fan.
2. The external fan control method according to claim 1, wherein the step of selectively obtaining the operating frequency of the inverter compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit specifically comprises:
under the condition that the photovoltaic air conditioning unit operates in a refrigeration mode, if the outdoor temperature is lower than a first refrigeration preset temperature, acquiring the operating frequency of the variable frequency compressor;
under the condition that the photovoltaic air conditioning unit operates in the refrigeration mode, the step of determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable-frequency compressor specifically comprises the following steps:
if the outdoor temperature is less than or equal to a second refrigeration preset temperature, determining that the rotating speed of the main fan is a first preset rotating speed when the operating frequency of the variable frequency compressor is less than a first preset frequency, determining that the rotating speed of the main fan is a second preset rotating speed when the operating frequency of the variable frequency compressor is greater than or equal to the first preset frequency and less than or equal to a second preset frequency, and determining that the rotating speed of the main fan is a third preset rotating speed when the operating frequency of the variable frequency compressor is greater than the second preset frequency;
if the outdoor temperature is higher than the second refrigeration preset temperature and lower than the first refrigeration preset temperature, determining that the rotating speed of the main fan is the second preset rotating speed when the operating frequency of the variable frequency compressor is lower than the first preset frequency, determining that the rotating speed of the main fan is the third preset rotating speed when the operating frequency of the variable frequency compressor is higher than or equal to the first preset frequency and lower than or equal to the second preset frequency, and determining that the rotating speed of the main fan is the fourth preset rotating speed when the operating frequency of the variable frequency compressor is higher than the second preset frequency;
the first preset rotating speed is less than the second preset rotating speed, and the third preset rotating speed is less than the fourth preset rotating speed.
3. The external fan control method according to claim 2, wherein the step of determining the operating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit in the case that the photovoltaic air conditioning unit operates in the cooling mode specifically comprises:
and if the outdoor temperature is greater than or equal to the first refrigeration preset temperature, determining the rotating speed of the main fan to be the fourth preset rotating speed.
4. The external fan control method according to claim 2, wherein the step of controlling the actual operating speeds of the main fan and the solar fan according to the determined operating speed of the main fan specifically comprises:
further acquiring the electric quantity of the solar fan, and if the determined operation rotating speed of the main fan is less than the first preset rotating speed and the electric quantity of the solar fan is greater than the first preset electric quantity, controlling the main fan to stop rotating and controlling the solar fan to rotate at the determined operation rotating speed of the main fan; and/or
If the determined operation rotating speed of the main fan is greater than or equal to the first preset rotating speed and less than or equal to the third preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a first correction rotating speed from the determined operation rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the first correction rotating speed by a first correction coefficient; and/or
If the determined running rotating speed of the main fan is greater than the third preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a second correction rotating speed from the determined running rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the second correction rotating speed by a second correction coefficient;
wherein the first correction coefficient is smaller than the second correction coefficient.
5. The external fan control method according to claim 1, wherein the step of selectively obtaining the operating frequency of the inverter compressor according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit specifically comprises:
under the condition that the photovoltaic air conditioning unit operates in a heating mode, if the outdoor temperature is lower than a first heating preset temperature, acquiring the operating frequency of the variable frequency compressor;
under the condition that the photovoltaic air conditioning unit operates in the heating mode, the step of determining the operating rotating speed of the main fan according to the outdoor temperature, the operating mode of the photovoltaic air conditioning unit and the operating frequency of the variable-frequency compressor specifically comprises the following steps:
if the outdoor temperature is less than or equal to a second heating preset temperature, determining that the rotating speed of the main fan is a fifth preset rotating speed when the operating frequency of the inverter compressor is less than a third preset frequency, and determining that the rotating speed of the main fan is a sixth preset rotating speed when the operating frequency of the inverter compressor is greater than or equal to the third preset frequency;
if the outdoor temperature is higher than the second heating preset temperature and lower than the first heating preset temperature, determining that the rotating speed of the main fan is a seventh preset rotating speed when the operating frequency of the inverter compressor is lower than the third preset frequency, determining that the rotating speed of the main fan is a fifth preset rotating speed when the operating frequency of the inverter compressor is higher than or equal to the third preset frequency and lower than or equal to a fourth preset frequency, and determining that the rotating speed of the main fan is a sixth preset rotating speed when the operating frequency of the inverter compressor is higher than the fourth preset frequency;
wherein the seventh preset rotating speed is less than the fifth preset rotating speed and less than the sixth preset rotating speed.
6. The external fan control method according to claim 5, wherein, in the case that the photovoltaic air conditioning unit operates in the heating mode, the step of determining the operating speed of the main fan according to the outdoor temperature and the operating mode of the photovoltaic air conditioning unit specifically comprises:
if the outdoor temperature is greater than or equal to the first heating preset temperature, determining that the rotating speed of the main fan is an eighth preset rotating speed;
wherein the eighth preset rotating speed is less than the seventh preset rotating speed.
7. The external fan control method according to claim 6, wherein the step of controlling the actual operating speeds of the main fan and the solar fan according to the determined operating speed of the main fan specifically comprises:
further acquiring the electric quantity of the solar fan, and if the determined operation rotating speed of the main fan is less than the eighth preset rotating speed and the electric quantity of the solar fan is greater than a second preset electric quantity, controlling the main fan to stop rotating and controlling the solar fan to rotate at the determined operation rotating speed of the main fan; and/or
If the determined operation rotating speed of the main fan is greater than or equal to the eighth preset rotating speed and less than or equal to the fifth preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a third correction rotating speed from the determined operation rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the third correction rotating speed by a third correction coefficient; and/or
If the determined running rotating speed of the main fan is greater than the fifth preset rotating speed, controlling the main fan to rotate at a rotating speed obtained by subtracting a fourth correction rotating speed from the determined running rotating speed of the main fan and controlling the solar fan to rotate at a rotating speed obtained by multiplying the fourth correction rotating speed by a fourth correction coefficient;
wherein the third correction coefficient is smaller than the fourth correction coefficient.
8. The external fan control method according to any one of claims 5 to 7, wherein in a case where the photovoltaic air conditioning unit operates in a defrosting mode, the external fan control method further comprises:
when the main fan stops rotating, the solar fan is controlled to stop rotating;
and when the main fan starts to rotate, controlling the solar fan to start to rotate.
9. The outer fan control method according to any one of claims 1 to 7, further comprising:
when the electric quantity of the solar fan is smaller than a third preset electric quantity, controlling the solar fan to stop rotating, controlling the rotating speed of the main fan to increase by a first preset amplitude, and then controlling the rotating speed of the main fan to decrease by a second preset amplitude every first preset time period until the rotating speed of the main fan is decreased to the rotating speed before the increase;
wherein the second preset amplitude is smaller than the first preset amplitude.
10. The outer fan control method according to any one of claims 1 to 7, further comprising:
and under the condition that the solar fan breaks down, controlling the main fan to rotate at the determined running rotating speed of the main fan.
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