CN110805990B - Air conditioner, anti-condensation control method and device thereof, and computer readable storage medium - Google Patents

Air conditioner, anti-condensation control method and device thereof, and computer readable storage medium Download PDF

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Publication number
CN110805990B
CN110805990B CN201911152489.3A CN201911152489A CN110805990B CN 110805990 B CN110805990 B CN 110805990B CN 201911152489 A CN201911152489 A CN 201911152489A CN 110805990 B CN110805990 B CN 110805990B
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temperature
coil
air conditioner
dew point
power module
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CN110805990A (en
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席战利
李百战
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Chongqing University
GD Midea Air Conditioning Equipment Co Ltd
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Chongqing University
GD Midea Air Conditioning Equipment 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
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/41—Defrosting; Preventing freezing
    • 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
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/56—Remote control
    • F24F11/58—Remote control using Internet communication
    • 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
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/86—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling compressors within refrigeration or heat pump circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/88—Electrical aspects, e.g. circuits
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2140/00—Control inputs relating to system states
    • F24F2140/20—Heat-exchange fluid temperature

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Human Computer Interaction (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The invention discloses an air conditioner, an anti-condensation control method and an anti-condensation control device thereof, and a computer readable storage medium, wherein the method comprises the following steps: calculating the dew point temperature of a power module in the air conditioner according to the corresponding air temperature and air humidity of the power module; detecting the temperature of a coil of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner; and adjusting the frequency of a compressor of the air conditioner according to the dew point temperature and the coil temperature so as to increase the coil temperature and prevent condensation on the power module. The invention improves the temperature of the coil pipe through the change of the frequency of the compressor, so that the temperature of the coil pipe is higher than the dew point temperature, condensation on the power module is avoided, and the reliability and the safety of the power module when the air conditioner operates are ensured.

Description

Air conditioner, anti-condensation control method and device thereof, and computer readable storage medium
Technical Field
The invention relates to the technical field of air conditioner equipment, in particular to an air conditioner, an anti-condensation control method and device thereof and a computer readable storage medium.
Background
With the popularization of air conditioners, the use frequency of the air conditioners in daily life is higher and higher, and more people realize indoor temperature reduction in summer and indoor temperature rise in winter through the air conditioners. When the air conditioner is in cooling or heating operation, the power module in the air conditioner can generate heat, and if the heat is not dissipated timely, the working temperature of the power module is too high, so that the power module breaks down.
At present, the heat dissipation of the power module of the air conditioner mainly adopts an air cooling heat dissipation mode, namely, the temperature of the power module is reduced in a mode that normal temperature air flows through the power module to take away heat. When the outdoor environment temperature is too high, the air cooling heat dissipation mode has poor heat dissipation effect, and the reliable operation of the air conditioner in a high-temperature environment cannot be ensured. Therefore, patent cn201420635842.x proposes a scheme of radiating the power module by using a liquid refrigerant, which can improve the radiating effect of the air conditioner in a high-temperature environment; however, when the refrigerant heat dissipation scheme is used for throttling heat dissipation of the power module, the risk of condensation on the power module exists, the reliability and the safety of the power module are affected, and even the risk of burning the power module exists in severe cases.
Disclosure of Invention
The invention mainly aims to provide an air conditioner, an anti-condensation control method and device of the air conditioner and a computer readable storage medium, and aims to solve the technical problems that condensation is easily generated on a power module when the power module is radiated by a refrigerant, so that the use reliability and safety of the power module are influenced, and even the power module is burnt out in the prior art.
In order to achieve the above object, the present invention provides an anti-condensation control method for an air conditioner, including the steps of:
calculating the dew point temperature of a power module in the air conditioner according to the corresponding air temperature and air humidity of the power module;
detecting the temperature of a coil of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
and adjusting the frequency of a compressor of the air conditioner according to the dew point temperature and the coil temperature so as to increase the coil temperature and prevent condensation on the power module.
Preferably, the step of adjusting the compressor frequency of the air conditioner according to the dew point temperature and the coil temperature comprises:
judging whether the dew point temperature is greater than the coil temperature, if so, setting the coil temperature as the temperature before adjustment, and increasing the frequency of the compressor;
controlling the air conditioner to operate at the increased compressor frequency for a preset time, and detecting the adjusted temperature of the refrigerant heat dissipation coil;
and controlling the air conditioner to operate according to the magnitude relation between the temperature before adjustment and the temperature after adjustment.
Preferably, the step of controlling the operation of the air conditioner according to the magnitude relationship between the pre-conditioning temperature and the post-conditioning temperature includes:
judging whether the adjusted temperature is greater than or equal to the pre-adjustment temperature or not, and if so, updating the temperature of the coil pipe to the adjusted temperature;
and judging whether the updated coil temperature is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the increased compressor frequency.
Preferably, the step of determining if the updated coil temperature is greater than or equal to the dew point temperature is followed by:
if the updated coil temperature is less than the dew point temperature, setting the updated coil temperature to a pre-conditioning temperature and performing the step of turning up the compressor frequency until the updated coil temperature is greater than or equal to the dew point temperature.
Preferably, the step of judging whether the post-adjustment temperature is greater than or equal to the pre-adjustment temperature is followed by:
if the adjusted temperature is lower than the temperature before adjustment, the frequency of the compressor is adjusted to be low;
controlling the air conditioner to operate at the reduced compressor frequency for a preset time period, and detecting the temperature of the coil again;
and judging whether the coil temperature detected again is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the reduced frequency of the compressor.
Preferably, the step of determining whether the re-detected coil temperature is greater than or equal to the dew point temperature comprises:
if the re-detected coil temperature is less than the dew point temperature, the step of reducing the compressor frequency is executed until the re-detected coil temperature is greater than or equal to the dew point temperature.
Preferably, the refrigerant heat dissipation coil is further connected to a throttling component, and the step of adjusting the frequency of the compressor of the air conditioner according to the dew point temperature and the coil temperature includes:
when the frequency of the compressor is adjusted to reach a preset frequency, judging whether the dew point temperature is greater than the temperature of the coil pipe;
and if the dew point temperature is higher than the coil pipe temperature, adjusting the opening of the throttling component so as to increase the coil pipe temperature based on the opening adjustment of the throttling component and prevent condensation on the power module.
In order to achieve the above object, the present invention also provides an anti-condensation control device for an air conditioner, comprising:
the calculation module is used for calculating the dew point temperature of the power module according to the air temperature and the air humidity corresponding to the power module in the air conditioner;
the detection module is used for detecting the coil temperature of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
and the adjusting module is used for adjusting the frequency of a compressor of the air conditioner according to the dew point temperature and the coil temperature so as to improve the coil temperature and prevent condensation from being generated on the power module.
In order to achieve the above object, the present invention further provides an air conditioner including a processor, a memory storing a control program, the control program being executed by the processor and implementing the steps of the anti-condensation control method of the air conditioner as described above.
To achieve the above object, the present invention also provides a computer readable storage medium having stored thereon a control program, which when executed by a processor, implements the steps of the anti-condensation control method of an air conditioner as described above.
According to the air conditioner and the anti-condensation control method, device and computer readable storage medium thereof provided by the embodiment of the invention, firstly, the dew point temperature of a power module in the air conditioner is calculated according to the temperature and humidity corresponding to the power module, and the coil temperature of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner is detected; the dew point temperature represents the temperature of condensation generated on the power module, and the temperature of the coil is the temperature of a pipeline where a refrigerant for dissipating heat of the power module is located; when the coil temperature is below the dew point temperature, there is a risk of condensation on the power module. In order to avoid the generation of condensation, the frequency of a compressor of the air conditioner is adjusted according to the magnitude relation between the dew point temperature and the temperature of the coil pipe, the temperature of the coil pipe is increased through the change of the frequency of the compressor, so that the temperature of the coil pipe is higher than the dew point temperature, the condensation generated on the power module is avoided, and the reliability and the safety of the power module when the air conditioner operates are ensured.
Drawings
FIG. 1 is a schematic diagram of a terminal architecture of a hardware operating environment according to an embodiment of the present invention;
FIG. 2 is a flow chart illustrating a condensation preventing control method of an air conditioner according to a first embodiment of the present invention;
FIG. 3 is a flow chart illustrating a condensation preventing control method of an air conditioner according to a fourth embodiment of the present invention;
FIG. 4 is a schematic functional block diagram of an anti-condensation control apparatus for an air conditioner according to a preferred embodiment of the present invention;
fig. 5 is a schematic flow chart illustrating data processing in the anti-condensation control method of the air conditioner according to the first to third embodiments of the present invention;
fig. 6 is a schematic view of an air conditioner system in the condensation prevention control method of the air conditioner according to the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The main solution of the embodiment of the invention is as follows: firstly, calculating the dew point temperature of a power module in the air conditioner according to the temperature and the humidity of the power module, and detecting the temperature of a coil of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner; according to the size relation between the dew point temperature and the coil pipe temperature, the frequency of a compressor of the air conditioner is adjusted, and the temperature of the coil pipe is improved through the change of the frequency of the compressor, so that the temperature of the coil pipe is higher than the dew point temperature, condensation on a power module is avoided, and the reliability and the safety of the power module when the air conditioner operates are ensured.
Referring to fig. 1, fig. 1 is a schematic diagram illustrating an internal structure of an air conditioner in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the air conditioner may include: a processor 1001, such as a CPU, a network interface 1004, a user interface 1003, a memory 1005, a communication bus 1002. Wherein a communication bus 1002 is used to enable connective communication between these components. The user interface 1003 may include a Display screen (Display), an input unit such as a Keyboard (Keyboard), and the optional user interface 1003 may also include a standard wired interface, a wireless interface. The network interface 1004 may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface). The memory 1005 may be a high-speed RAM memory or a non-volatile memory (e.g., a magnetic disk memory). The memory 1005 may alternatively be a storage device separate from the processor 1001.
Those skilled in the art will appreciate that the internal structure of the air conditioner shown in fig. 1 does not constitute a limitation of the air conditioner, and may include more or fewer components than those shown, or some components in combination, or a different arrangement of components.
As shown in fig. 1, a memory 1005, which is a kind of computer storage medium, may include therein an operating system, a network communication module, a user interface module, and a control program.
In the air conditioner shown in fig. 1, the network interface 1004 is mainly used for connecting to a backend server and performing data communication with the backend server; the user interface 1003 is mainly used for connecting a client (user side) and performing data communication with the client; and the processor 1001 may be configured to call the control program stored in the memory 1005 and perform the following operations:
calculating the dew point temperature of a power module in the air conditioner according to the corresponding air temperature and air humidity of the power module;
detecting the temperature of a coil of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
and adjusting the frequency of a compressor of the air conditioner according to the dew point temperature and the coil temperature so as to increase the coil temperature and prevent condensation on the power module.
Further, the step of adjusting the compressor frequency of the air conditioner according to the dew point temperature and the coil temperature comprises:
judging whether the dew point temperature is greater than the coil temperature, if so, setting the coil temperature as the temperature before adjustment, and increasing the frequency of the compressor;
controlling the air conditioner to operate at the increased compressor frequency for a preset time, and detecting the adjusted temperature of the refrigerant heat dissipation coil;
and controlling the air conditioner to operate according to the magnitude relation between the temperature before adjustment and the temperature after adjustment.
Further, the step of controlling the operation of the air conditioner according to the magnitude relationship between the pre-conditioning temperature and the post-conditioning temperature comprises:
judging whether the adjusted temperature is greater than or equal to the pre-adjustment temperature or not, and if so, updating the temperature of the coil pipe to the adjusted temperature;
and judging whether the updated coil temperature is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the increased compressor frequency.
Further, the step of determining if the updated coil temperature is greater than or equal to the dew point temperature is followed by:
if the updated coil temperature is less than the dew point temperature, setting the updated coil temperature to a pre-conditioning temperature and performing the step of turning up the compressor frequency until the updated coil temperature is greater than or equal to the dew point temperature.
Further, the step of determining whether the post-conditioning temperature is greater than or equal to the pre-conditioning temperature may be followed by:
if the adjusted temperature is lower than the temperature before adjustment, the frequency of the compressor is adjusted to be low;
controlling the air conditioner to operate at the reduced compressor frequency for a preset time period, and detecting the temperature of the coil again;
and judging whether the coil temperature detected again is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the reduced frequency of the compressor.
Further, the step of determining whether the re-sensed coil temperature is greater than or equal to the dew point temperature comprises:
if the re-detected coil temperature is less than the dew point temperature, the step of reducing the compressor frequency is executed until the re-detected coil temperature is greater than or equal to the dew point temperature.
Further, the refrigerant heat dissipation coil is further connected to a throttling component, and after the step of adjusting the compressor frequency of the air conditioner according to the dew point temperature and the coil temperature, the processor 1001 may call a control program stored in the memory 1005 to perform the following operations:
when the frequency of the compressor is adjusted to reach a preset frequency, judging whether the dew point temperature is greater than the temperature of the coil pipe;
and if the dew point temperature is higher than the coil pipe temperature, adjusting the opening of the throttling component so as to increase the coil pipe temperature based on the opening adjustment of the throttling component and prevent condensation on the power module.
For a better understanding of the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.
In order to better understand the technical solution, the technical solution will be described in detail with reference to the drawings and the specific embodiments.
Referring to fig. 2, fig. 2 is a flowchart illustrating a condensation prevention control method of an air conditioner according to a first embodiment of the present invention. In this embodiment, the anti-condensation control method of the air conditioner includes the following steps:
step S10, calculating the dew point temperature of the power module according to the air temperature and the air humidity corresponding to the power module in the air conditioner;
the condensation prevention control method of the air conditioner is applied to an electric control system of the air conditioner, the air conditioner is preferably a variable frequency air conditioner, and the electric control system is used for realizing various detection and control on various parameters of the air conditioner. Meanwhile, the electric control system comprises a Power Module (IPM); the power module is internally composed of three groups (two in each group) of high-power switching triodes and is used for converting the direct-current voltage input into a three-phase alternating-current power supply for driving the compressor through the switching action of an IGBT (insulated gate bipolar transistor) in the power module; the operating frequency of the variable frequency compressor is completely controlled by the operating voltage output by the power module, and the higher the voltage output by the power module is, the higher the operating frequency and the output power of the compressor are; conversely, the lower the operating frequency and output power of the press.
Further, in order to dissipate heat of the power module during the operation of the air conditioner, the embodiment is provided with a mechanism for introducing the refrigerant in the air conditioner into the power module. Specifically, a pipeline for flowing of the refrigerant can be introduced to the position of the power module, and is used as the refrigerant heat dissipation coil to be wound on the outer surface of the power module, and the heat of the power module is taken away through the flowing of the refrigerant in the heat dissipation coil. In addition, a heat dissipation assembly can be arranged on the outer surface of the power module, and a refrigerant heat dissipation coil is arranged in the heat dissipation assembly and connected with a pipeline through which refrigerant flows, so that the refrigerant is introduced into the refrigerant heat dissipation pipeline to dissipate heat of the power module. It should be noted that, as long as the refrigerant heat dissipation pipeline and the outer surface of the power module are in a stacked relationship, the refrigerant can flow through the power module through the refrigerant heat dissipation coil to form a refrigerant heat dissipation coil corresponding to the power module in the air conditioner, and the specific connection relationship between the refrigerant heat dissipation pipeline and the outer surface of the power module is not limited.
Furthermore, the electric control system is also provided with a temperature and humidity sensor for detecting the air temperature and the air humidity around the power module, the temperature and humidity sensor transmits the detected air temperature and the detected air humidity around the power module to a control center of the electric control system as the air temperature and the air humidity of the power module, and the control center calculates the dew point temperature of the air around the power module according to a preset formula, so as to obtain the dew point temperature of the power module. In addition, a mapping table of dew point temperatures of all air temperatures under different air humidity can be preset, after the temperature and humidity sensors detect the air temperature and the air humidity around the power module, the mapping table is called, the dew point temperatures mapped by the detected air temperature and the detected air humidity in the mapping table are obtained through table lookup, and the dew point temperature of the power module is obtained. The dew point temperature represents a temperature condition required for generating condensation on the power module, when the temperature of the coil of the refrigerant heat dissipation coil is less than the dew point temperature, the risk of generating condensation on the power module is provided, otherwise, if the temperature of the coil of the refrigerant heat dissipation coil is greater than or equal to the dew point temperature, the risk of generating condensation on the power module is avoided.
It should be noted that, in order to ensure that the air temperature and the air humidity detected by the temperature and humidity sensor are stable, a delay detection mechanism is provided. The method comprises the steps that time delay duration is preset, when the air conditioner is detected to be started and operated, the air conditioner is stably operated when the operation duration reaches the time delay duration, and system parameters such as frequency, an electromagnetic expansion valve and a temperature point are stable, a control center sends a detection instruction to a temperature and humidity sensor or the temperature and humidity are automatically started. The temperature and humidity sensor detects the air temperature and the air humidity around the power module after receiving a detection instruction or automatically starting the power module, so that the accuracy of the dew point temperature obtained by calculating the detected air temperature and air humidity is ensured.
Step S20, detecting the coil temperature of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
understandably, in order to avoid condensation on the power module, the temperature of the coil of the refrigerant heat dissipation coil needs to be controlled not to meet the temperature condition required by condensation on the power module, namely the temperature of the coil is controlled to be greater than or equal to the dew point temperature; in order to determine the magnitude relationship between the coil temperature and the dew point temperature, the coil temperature needs to be detected first. Therefore, the temperature sensor used for detecting the temperature of the refrigerant heat dissipation coil is further arranged in the electric control system, the temperature sensor transmits the detected temperature of the coil to the control center of the electric control system, the temperature of the coil is ensured to be larger than or equal to the dew point temperature through the control center, and condensation is prevented from being generated on the power module.
And step S30, adjusting the frequency of the compressor of the air conditioner according to the dew point temperature and the coil temperature to increase the coil temperature and prevent the power module from generating condensation.
Further, after the dew point temperature representing condensation generated on the power module and the coil temperature of the refrigerant heat dissipation coil pipe corresponding to the power module are obtained, the control center adjusts the frequency of the compressor of the air conditioner according to the size relation between the dew point temperature and the coil temperature. Wherein the magnitude relationship between dew point temperature and coil temperature comprises: the coil temperature is greater than or equal to the dew point temperature, and the coil temperature is less than the dew point temperature. For the situation that the temperature of the coil pipe is greater than or equal to the dew point temperature, because the temperature of the coil pipe does not meet the temperature condition for generating condensation, the condensation can not be generated on the power module at the moment, the frequency of the compressor does not need to be adjusted, and the air conditioner is controlled to operate at the current frequency of the compressor. To the situation that the coil pipe temperature is less than the dew point temperature, the temperature condition of generating condensation is met due to the fact that the coil pipe temperature is low, condensation can be generated on the power module, the frequency of a compressor of the air conditioner needs to be adjusted, the heat productivity of the power module is increased due to the change of the frequency of the compressor, the effect of heating the refrigerant heat dissipation coil pipe is achieved, the coil pipe temperature of the refrigerant heat dissipation coil pipe is further improved, the coil pipe temperature is not less than the dew point temperature, condensation is prevented from being generated on the power module, and safe work of the power module is guaranteed.
According to the air conditioner and the anti-condensation control method, device and computer readable storage medium thereof provided by the embodiment of the invention, firstly, the dew point temperature of a power module in the air conditioner is calculated according to the temperature and humidity corresponding to the power module, and the coil temperature of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner is detected; the dew point temperature represents the temperature of condensation generated on the power module, and the temperature of the coil is the temperature of a pipeline where a refrigerant for dissipating heat of the power module is located; when the coil temperature is below the dew point temperature, there is a risk of condensation on the power module. In order to avoid the generation of condensation, the frequency of a compressor of the air conditioner is adjusted according to the magnitude relation between the dew point temperature and the temperature of the coil pipe, the temperature of the coil pipe is increased through the change of the frequency of the compressor, so that the temperature of the coil pipe is higher than the dew point temperature, the condensation generated on the power module is avoided, and the reliability and the safety of the power module when the air conditioner operates are ensured.
Further, a second embodiment of the condensation preventing control method of the air conditioner of the present invention is proposed based on the first embodiment of the condensation preventing control method of the air conditioner of the present invention, and in the second embodiment, the adjusting the frequency of the compressor of the air conditioner according to the dew point temperature and the coil temperature includes:
step S31, judging whether the dew point temperature is larger than the coil temperature, if so, setting the coil temperature as the temperature before adjustment, and increasing the frequency of the compressor;
step S32, controlling the air conditioner to operate for a preset time at the increased compressor frequency, and detecting the adjusted temperature of the refrigerant heat dissipation coil;
and step S33, controlling the air conditioner to operate according to the size relation between the temperature before adjustment and the temperature after adjustment.
In the process of adjusting the frequency of the compressor of the air conditioner according to the magnitude relation between the dew point temperature and the temperature of the coil, the control center compares the dew point temperature with the temperature of the coil to judge whether the dew point temperature is greater than the temperature of the coil. If the dew point temperature is judged to be greater than the coil temperature, the risk of generating condensation on the power module is indicated, and therefore the frequency of the compressor needs to be adjusted. The temperature of the coil pipe detected by the temperature sensor is used as the temperature before adjustment, and the frequency of the compressor is adjusted to be high. The increase of the frequency of the compressor can bring two effects on the heat dissipation of the power module, namely, the temperature of the refrigerant in the refrigerant heat dissipation coil is reduced, and the heat productivity of the power module is increased; when the cold quantity generated by the reduction of the temperature of the refrigerant in the refrigerant heat dissipation coil is lower than the heat productivity of the power module, the power module heats the refrigerant heat dissipation coil, so that the effect of improving the temperature of the coil is achieved.
Further, in the embodiment, a preset value for adjusting the frequency of the compressor is preset, for example, 10Hz, the frequency of the compressor is increased by the preset value, and the air conditioner is controlled to operate at the increased frequency of the compressor for a preset time period, which is a time length preset according to a requirement, for example, 5 min. And after the air conditioner runs for a preset time at the increased compressor frequency to ensure that all parameters of the air conditioner are stable, detecting the temperature of the refrigerant heat dissipation coil pipe, and taking the detected temperature as the adjusted temperature. The temperature after the detection of the refrigerant heat dissipation coil is relative to the temperature before the detection, the influence of the frequency increase of the compressor on the coil temperature of the refrigerant heat dissipation coil is represented, the coil temperature can be effectively improved by increasing the frequency of the compressor, the temperature after the adjustment is larger than the temperature before the adjustment, the temperature after the adjustment is not larger than the temperature before the adjustment, and the temperature after the adjustment is not larger than the temperature before the adjustment. For the difference of the influences, in order to prevent condensation from being generated on the power module, the air conditioners are operated in different modes; namely, the control center controls the air conditioner to operate in different modes according to the magnitude relation between the temperature before detection and the temperature after detection of the refrigerant heat dissipation coil. Specifically, the step of controlling the operation of the air conditioner according to the magnitude relationship between the pre-conditioning temperature and the post-conditioning temperature includes:
step S331, judging whether the adjusted temperature is greater than or equal to the pre-adjustment temperature, and if the adjusted temperature is greater than or equal to the pre-adjustment temperature, updating the temperature of the coil pipe to the adjusted temperature;
step S332, determining whether the updated coil temperature is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the increased compressor frequency.
Furthermore, the temperature after adjustment is compared with the temperature before adjustment, and whether the temperature after adjustment is greater than the temperature before adjustment is judged. If the temperature after the adjustment is higher than the temperature before the adjustment, the frequency of the compressor is increased, so that the cold quantity generated by the temperature reduction of the refrigerant heat dissipation coil is lower than the heat productivity of the power module; the frequency of the compressor is increased to heat the cooling medium heat dissipation coil pipe, so that the temperature of the coil pipe can be effectively increased. At this time, the temperature of the coil is updated to the adjusted temperature, and the temperature of the refrigerant heat dissipation coil is represented after the frequency of the compressor is increased.
Further, a comparison is made between the updated coil temperature and the dew point temperature to determine whether the updated coil temperature is greater than or equal to the dew point temperature. If the temperature is higher than or equal to the dew point temperature, the temperature of the coil pipe of the refrigerant heat dissipation coil pipe does not meet the condition of generating condensation after the frequency of the compressor is increased, the condensation cannot be generated on the power module, and therefore the air conditioner is controlled to operate at the increased frequency of the compressor. Conversely, if it is detected that the updated coil temperature is still less than the dew point temperature, it is indicated that the compressor frequency increase, although increasing the coil temperature, still increases the amount by less than the dew point temperature, and still risks causing condensation on the power module, i.e., the coil temperature increases by an insufficient amount. At the moment, the updated temperature of the coil is set as the temperature before adjustment, and the frequency of the compressor is continuously adjusted on the basis of the temperature before adjustment; and continuously increasing the frequency of the compressor until the temperature after adjustment is greater than or equal to the temperature before adjustment, and simultaneously, the updated temperature of the coil is greater than or equal to the dew point temperature, so that the condensation on the power module is effectively prevented.
According to the implementation, the frequency of the compressor is increased, so that the cold quantity generated by the reduction of the temperature of the refrigerant in the refrigerant heat dissipation coil is lower than the increased heat productivity of the power module, the temperature of the coil of the refrigerant heat dissipation coil is increased, the temperature of the coil is higher than or equal to the dew point temperature, condensation on the power module is avoided, and the safety and the reliability of the power module are ensured.
Further, a third embodiment of the condensation preventing control method of the air conditioner of the present invention is proposed based on the second embodiment of the condensation preventing control method of the air conditioner of the present invention, and in the third embodiment, the step of determining whether the post-adjustment temperature is greater than or equal to the pre-adjustment temperature includes, after the step of determining whether the post-adjustment temperature is greater than or equal to the pre-adjustment temperature:
step S334, if the adjusted temperature is lower than the temperature before adjustment, the frequency of the compressor is adjusted to be low;
step S335, controlling the air conditioner to operate at the reduced compressor frequency for a preset time, and detecting the temperature of the coil again;
step S336, determining whether the re-detected coil temperature is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the reduced compressor frequency.
Furthermore, if the adjusted temperature is lower than the temperature before adjustment, it indicates that the compressor frequency is increased and the cooling capacity generated by reducing the temperature of the refrigerant heat-dissipating coil cannot be lower than the heating capacity of the power module. The frequency of the compressor is increased, the refrigerant heat dissipation coil cannot be heated, the temperature of the coil of the refrigerant heat dissipation coil is reduced, and the temperature of the coil cannot be effectively increased. At the moment, the frequency of the compressor is reduced, and the reduction of the frequency of the compressor can also bring two effects on the heat dissipation of the power module, namely the temperature of the refrigerant heat dissipation coil pipe is increased, and the heat productivity of the power module is reduced. Although the heat productivity of the power module is reduced, as long as the power module generates heat, the heat productivity is still higher than the temperature of the refrigerant heat dissipation coil; therefore, no matter the temperature of the refrigerant heat dissipation coil rises or the heat productivity of the power module is reduced, the temperature of the refrigerant heat dissipation coil can be promoted to rise, and the effect of improving the temperature of the coil is achieved.
Similarly, in order to ensure the stability of various parameters of the air conditioner, the temperature of the coil pipe of the refrigerant heat dissipation coil pipe is detected again after the air conditioner runs for a preset time at the reduced frequency of the compressor, and the temperature of the coil pipe obtained by the secondary detection is compared with the dew point temperature to judge whether the temperature is greater than or equal to the dew point temperature. If the temperature is higher than or equal to the dew point temperature, the temperature of the coil pipe of the refrigerant heat dissipation coil pipe does not meet the condition of generating condensation after the frequency of the compressor is reduced, and the condensation cannot be generated on the power module, so that the air conditioner is controlled to operate at the reduced frequency of the compressor. On the contrary, if it is determined that the re-detected coil temperature is still less than the dew point temperature, it indicates that the decreasing of the compressor frequency may increase the coil temperature, but the increase amount is still less than the dew point temperature, which still has a risk of generating condensation on the power module, i.e. the increase amount of the coil temperature is insufficient. At this point, the compressor frequency continues to be adjusted based on the re-sensed coil temperature, and the compressor frequency continues to be adjusted down until the re-sensed coil temperature is greater than or equal to the dew point problem, to effectively prevent condensation on the power module. It should be noted that, for a specific processing flow of data in the first to third embodiments, reference may be made to fig. 5, and a specific implementation manner of each step in fig. 5 has a corresponding relationship with the description portion in the first to third embodiments, and details are not repeated herein.
This implementation can not realize improving the coil pipe problem to be greater than the dew point temperature with compressor frequency increase under the circumstances, through the mode of will compressing the compressor frequency and turning down for refrigerant heat dissipation coil's temperature risees and the power module generates heat, improves refrigerant heat dissipation coil's coil pipe temperature with this, makes the coil pipe temperature be greater than or equal to dew point temperature, in order to avoid producing the condensation on the power module, has ensured power module's security and reliability.
Further, referring to fig. 3, a fourth embodiment of the condensation prevention control method of an air conditioner according to the present invention is provided based on the first, second, and third embodiments of the condensation prevention control method of an air conditioner according to the present invention, in the fourth embodiment, the refrigerant heat dissipation coil is further connected to a throttling component, and the step of adjusting the frequency of the compressor of the air conditioner according to the dew point temperature and the coil temperature includes:
step S40, when the adjusting times of the compressor frequency reach the preset times, judging whether the dew point temperature is larger than the coil temperature;
and step S50, if the dew point temperature is greater than the coil temperature, adjusting the opening of the throttling member to increase the coil temperature based on the adjustment of the opening of the throttling member, thereby preventing the power module from generating condensation.
Referring to fig. 6, the air conditioner of the present embodiment further includes a throttling component in addition to the electronic control system 160, the power module 161 and the temperature sensor 162, and the throttling component includes a first throttling component 140 for throttling and adjusting temperature and a second throttling component 150 for recovering flow after adjusting temperature, and further includes a compressor 110, a condenser 120 and an evaporator 130. The first end and the second end of the compressor 110 are respectively connected with the first end of the condenser 120 and the first end of the evaporator 130 through refrigerant pipelines, the second end of the condenser 120 is connected with the first end of the first throttling part 140 through refrigerant pipelines, the second end of the first throttling part 140 is connected with the first end of the second throttling part 150 through refrigerant pipelines, and the second end of the second throttling part 150 is connected with the second end of the evaporator 130 through refrigerant pipelines; the refrigerant pipeline between the first throttling part 140 and the second throttling part 150 forms a refrigerant heat dissipation coil, and the whole refrigerant pipeline and each device form a refrigerant circulation system of the air conditioner, so that the refrigeration or heating of the air conditioner is realized.
Further, the present embodiment increases the coil temperature by a combination of the first throttling part 140 of the throttling part and adjusting the compressor frequency. Specifically, preset adjustment times representing the number of times of frequency adjustment of the compressor are preset, and after the number of times of frequency adjustment of the compressor reaches the preset times, whether the dew point temperature is still greater than the temperature of the coil pipe after the frequency adjustment of the compressor is judged, and if the dew point temperature is still greater than the temperature of the coil pipe, the effect of improving the temperature of the coil pipe in a mode of frequency adjustment of the compressor is poor. At this time, the opening degree of the first throttling part 140 in the throttling part is adjusted to adjust the flow rate of the refrigerant flowing through the refrigerant heat dissipation coil according to the opening degree, so as to increase the temperature of the coil and prevent the power module from generating condensation.
The embodiment realizes the improvement of the temperature of the coil pipe by combining the mode of adjusting the throttling component and the frequency of the compressor, and can ensure the effective adjustment of the improvement of the temperature of the coil pipe. In addition, the opening degree of the throttling component and the frequency of the compressor can be adjusted at the same time, namely the opening degree of the throttling component can be adjusted only after the adjusting frequency of the compressor reaches the preset frequency. Meanwhile, the temperature of the coil pipe can be improved by various modes such as firstly adjusting the opening of the throttling part and then adjusting the frequency of the compressor; by achieving an increase in the coil temperature with diversification, the effectiveness of preventing dew from being generated on the power module is ensured.
The invention also provides an anti-condensation control device of the air conditioner.
Referring to fig. 4 and 4, which are schematic functional block diagrams of a condensation prevention control device of an air conditioner according to a first embodiment of the present invention, the condensation prevention control device of an air conditioner includes:
the calculation module 10 is configured to calculate a dew point temperature of the power module according to an air temperature and an air humidity corresponding to the power module in the air conditioner;
the detection module 20 is used for detecting the coil temperature of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
and the adjusting module 30 is used for adjusting the frequency of the compressor of the air conditioner according to the dew point temperature and the coil temperature so as to increase the coil temperature and prevent condensation from being generated on the power module.
Further, the calculation module includes:
the judging unit is used for judging whether the dew point temperature is greater than the temperature of the coil pipe or not, if the dew point temperature is greater than the temperature of the coil pipe, the temperature of the coil pipe is set to be a temperature before adjustment, and the frequency of the compressor is increased;
the detection unit is used for controlling the air conditioner to operate at the increased compressor frequency for a preset time and detecting the adjusted temperature of the refrigerant heat dissipation coil;
and the control unit is used for controlling the operation of the air conditioner according to the size relation between the temperature before adjustment and the temperature after adjustment.
Further, the control unit is configured to:
judging whether the adjusted temperature is greater than or equal to the pre-adjustment temperature or not, and if so, updating the temperature of the coil pipe to the adjusted temperature;
and judging whether the updated coil temperature is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the increased compressor frequency.
Further, the control unit is configured to:
if the updated coil temperature is less than the dew point temperature, setting the updated coil temperature to a pre-conditioning temperature and performing the step of turning up the compressor frequency until the updated coil temperature is greater than or equal to the dew point temperature.
Further, the control unit is configured to:
if the adjusted temperature is lower than the temperature before adjustment, the frequency of the compressor is adjusted to be low;
controlling the air conditioner to operate at the reduced compressor frequency for a preset time period, and detecting the temperature of the coil again;
and judging whether the coil temperature detected again is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the reduced frequency of the compressor.
Further, the control unit is configured to:
if the re-detected coil temperature is less than the dew point temperature, the step of reducing the compressor frequency is executed until the re-detected coil temperature is greater than or equal to the dew point temperature.
Further, the anti-condensation control device of the air conditioner further comprises:
the judging module is used for judging whether the dew point temperature is greater than the temperature of the coil pipe or not when the adjusting times of the compressor frequency reach the preset times;
the adjusting module is further used for adjusting the opening degree of the throttling component if the dew point temperature is larger than the coil temperature, so that the coil temperature is increased based on the opening degree adjustment of the throttling component, and condensation is prevented from being generated on the power module.
In addition, the present invention also provides a computer-readable storage medium for storing a control program for a processor to execute and implement the steps of the anti-condensation control method of the air conditioner as described in all the above embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It should be noted that in the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The word "comprising" does not exclude the presence of elements or steps not listed in a claim. The word "a" or "an" preceding an element does not exclude the presence of a plurality of such elements. The invention may be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In the unit claims enumerating several means, several of these means may be embodied by one and the same item of hardware. The usage of the words first, second and third, etcetera do not indicate any ordering. These words may be interpreted as names.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims (9)

1. An anti-condensation control method of an air conditioner is characterized by comprising the following steps:
calculating the dew point temperature of a power module in the air conditioner according to the corresponding air temperature and air humidity of the power module;
detecting the temperature of a coil of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
adjusting the compressor frequency of the air conditioner according to the dew point temperature and the coil temperature to increase the coil temperature and prevent condensation on the power module;
wherein the step of adjusting the compressor frequency of the air conditioner according to the dew point temperature and the coil temperature comprises:
judging whether the dew point temperature is greater than the coil temperature, if so, setting the coil temperature as the temperature before adjustment, and increasing the frequency of the compressor;
controlling the air conditioner to operate at the increased compressor frequency for a preset time, and detecting the adjusted temperature of the refrigerant heat dissipation coil;
and controlling the air conditioner to operate according to the magnitude relation between the temperature before adjustment and the temperature after adjustment.
2. The anti-condensation control method of an air conditioner according to claim 1, wherein the controlling of the operation of the air conditioner according to the magnitude relationship between the pre-conditioning temperature and the post-conditioning temperature comprises:
judging whether the adjusted temperature is greater than or equal to the pre-adjustment temperature or not, and if so, updating the temperature of the coil pipe to the adjusted temperature;
and judging whether the updated coil temperature is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the increased compressor frequency.
3. The anti-condensation control method of an air conditioner according to claim 2, wherein the step of determining whether the updated coil temperature is greater than or equal to the dew point temperature is followed by:
if the updated coil temperature is less than the dew point temperature, setting the updated coil temperature to a pre-conditioning temperature and performing the step of turning up the compressor frequency until the updated coil temperature is greater than or equal to the dew point temperature.
4. The anti-condensation control method of an air conditioner according to claim 2, wherein the step of determining whether the post-conditioning temperature is greater than or equal to the pre-conditioning temperature is followed by:
if the adjusted temperature is lower than the temperature before adjustment, the frequency of the compressor is adjusted to be low;
controlling the air conditioner to operate at the reduced compressor frequency for a preset time period, and detecting the temperature of the coil again;
and judging whether the coil temperature detected again is greater than or equal to the dew point temperature, and if so, controlling the air conditioner to operate at the reduced frequency of the compressor.
5. The anti-condensation control method of an air conditioner according to claim 4, wherein the step of judging whether the re-detected coil temperature is greater than or equal to the dew point temperature comprises:
if the re-detected coil temperature is less than the dew point temperature, the step of reducing the compressor frequency is executed until the re-detected coil temperature is greater than or equal to the dew point temperature.
6. The anti-condensation control method of the air conditioner according to any one of claims 1 to 5, wherein the refrigerant heat dissipation coil is further connected with a throttling part, and the step of adjusting the frequency of the compressor of the air conditioner according to the dew point temperature and the coil temperature comprises the following steps:
when the frequency of the compressor is adjusted to reach a preset frequency, judging whether the dew point temperature is greater than the temperature of the coil pipe;
and if the dew point temperature is higher than the coil pipe temperature, adjusting the opening of the throttling component so as to increase the coil pipe temperature based on the opening adjustment of the throttling component and prevent condensation on the power module.
7. An anti-condensation control device of an air conditioner, comprising:
the calculation module is used for calculating the dew point temperature of the power module according to the air temperature and the air humidity corresponding to the power module in the air conditioner;
the detection module is used for detecting the coil temperature of a refrigerant heat dissipation coil corresponding to the power module in the air conditioner;
the adjusting module is used for adjusting the frequency of a compressor of the air conditioner according to the dew point temperature and the coil temperature so as to increase the coil temperature and prevent condensation from being generated on the power module;
the calculation module comprises:
the judging unit is used for judging whether the dew point temperature is greater than the temperature of the coil pipe or not, if the dew point temperature is greater than the temperature of the coil pipe, the temperature of the coil pipe is set to be a temperature before adjustment, and the frequency of the compressor is increased;
the detection unit is used for controlling the air conditioner to operate at the increased compressor frequency for a preset time and detecting the adjusted temperature of the refrigerant heat dissipation coil;
and the control unit is used for controlling the operation of the air conditioner according to the size relation between the temperature before adjustment and the temperature after adjustment.
8. An air conditioner, characterized in that the air conditioner comprises a processor, a memory, the memory storing a control program, the control program being executed by the processor and implementing the steps of the anti-condensation control method of the air conditioner according to any one of claims 1 to 6.
9. A computer-readable storage medium storing a control program for execution by a processor and implementing the steps of the anti-condensation control method of the air conditioner according to any one of claims 1 to 6.
CN201911152489.3A 2019-11-21 2019-11-21 Air conditioner, anti-condensation control method and device thereof, and computer readable storage medium Expired - Fee Related CN110805990B (en)

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