CN112781175B - Heat exchanger filth blockage detection method and device, air conditioning equipment and storage medium - Google Patents
Heat exchanger filth blockage detection method and device, air conditioning equipment and storage medium Download PDFInfo
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- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000004378 air conditioning Methods 0.000 title claims abstract description 24
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- 238000004590 computer program Methods 0.000 claims description 11
- 238000004364 calculation method Methods 0.000 claims description 6
- 238000012935 Averaging Methods 0.000 claims description 5
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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
- F24F11/32—Responding to malfunctions or emergencies
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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
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—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
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/86—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
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
Abstract
The application discloses a heat exchanger filth blockage detection method, a device, air conditioning equipment and a storage medium, wherein the heat exchanger filth blockage detection method comprises the following steps: acquiring the flow of a refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger; obtaining the current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference; obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger; and judging whether the heat exchanger is dirty and blocked or not according to the current heat exchange capacity value and the standard heat exchange capacity value. Compared with the prior art, the scheme comprehensively judges whether the heat exchanger is dirty or not by analyzing various parameters, and improves the accuracy of detecting the dirty or blocked heat exchanger.
Description
Technical Field
The application belongs to the technical field of air conditioners, and particularly relates to a heat exchanger filth blockage detection method and device, air conditioning equipment and a storage medium.
Background
The heat exchanger is a core component of the air conditioner, is generally arranged in an air conditioner outdoor unit and plays an important role in an air conditioning system. The heat exchanger structure comprises pipelines and densely distributed fins, the fins are inserted in series on the pipelines and are densely distributed, gaps among the fins are extremely small, and the area of the fins is relatively large for sufficient heat exchange, so that dust and impurities in air are easily attached to the fins to cause dirt blockage when air flow passes through the fins in the operation of the air conditioner.
For example, the outdoor unit of the multi-split air conditioning system is often installed on the top of an outdoor building, and the heat exchanger exposed in the environment is easily fouled by dust, rainwater and the like on the surface of the fin, so that the heat exchanger is fouled. Once the heat exchanger is dirty and blocked, the heat exchange efficiency of the multi-split air-conditioning system can be greatly reduced, the heat exchanger can be corroded after dirt is not cleared for a long time, the service life of the heat exchanger is shortened, and the overall reliability of the multi-split air-conditioning system is reduced. Therefore, it is very necessary to find the heat exchanger dirty blocking in time, the existing heat exchanger dirty blocking method has a high misjudgment rate, and a large amount of manpower is wasted due to the fact that the number of the external units of the multi-split air conditioning system is large and the misjudgment of the heat exchanger dirty blocking is carried out.
Disclosure of Invention
In view of this, embodiments of the present application provide a heat exchanger filth blockage detection method and apparatus, an air conditioning device, and a storage medium, so as to solve at least one of the above technical problems.
An embodiment of a first aspect of the present application provides a method for detecting filth blockage of a heat exchanger, including:
acquiring the flow of a refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger;
obtaining the current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference;
obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger;
and judging whether the heat exchanger is dirty and blocked or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
According to the heat exchanger filth blockage detection method in the embodiment of the first aspect of the application, the current heat exchange capacity value of the heat exchanger is obtained according to the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of the inlet and the outlet of the heat exchanger; obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger; and judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
In some embodiments of the present application, the obtaining of the refrigerant flow rate through the heat exchanger and the inlet-outlet enthalpy difference of the heat exchanger includes:
collecting compressor operation parameters and ambient temperature, wherein the compressor operation parameters comprise compressor exhaust temperature and pressure and compressor operation frequency;
obtaining the inlet temperature and pressure of the heat exchanger, the outlet temperature and pressure of the heat exchanger and the return air temperature and pressure of the compressor according to the operating parameters of the compressor, the ambient temperature and a predetermined first fitting equation;
obtaining the refrigerant flow of the compressor according to the compressor exhaust temperature and pressure, the compressor return air temperature and pressure and a compressor ten-coefficient model, wherein the refrigerant flow of the compressor is the refrigerant flow passing through the heat exchanger;
and obtaining the inlet-outlet enthalpy difference of the heat exchanger according to the inlet temperature and pressure of the heat exchanger, the outlet temperature and pressure of the heat exchanger and a predetermined second fitting equation.
In some embodiments of the present application, the determining whether dirty blockage occurs in the heat exchanger according to the current heat exchange capacity value and the standard heat exchange capacity value includes:
obtaining a current heat exchange capacity difference value of the heat exchanger according to the current heat exchange capacity value and the standard heat exchange capacity value;
averaging the heat exchange capacity difference values obtained in a preset time period to obtain an average value;
and if the average value is larger than or equal to a preset average value threshold value, determining that the heat exchanger is dirty and blocked.
In some embodiments of the present application, the method further comprises:
if the average value is smaller than a preset average value threshold value, obtaining the filth blockage rate corresponding to each heat exchange capacity difference value in the preset time period according to the corresponding relation between the heat exchange capacity difference value of the heat exchanger and the filth blockage rate which is determined in advance;
and if the filth blockage rates are the same and are larger than a preset filth blockage rate threshold value, determining that the heat exchanger is filth-blocked.
In some embodiments of the present application, the method further comprises:
and if the filth blockage rates are different and increase in time sequence, determining that the heat exchanger is filth-blocked.
The dirty stifled detection device of heat exchanger of this application second aspect embodiment includes:
the acquisition module is used for acquiring the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger;
the module is used for obtaining the current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference; obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger;
and the judging module is used for judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
According to the heat exchanger filth blockage detection device in the embodiment of the second aspect of the application, the current heat exchange capacity value of the heat exchanger is obtained according to the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of the inlet and the outlet of the heat exchanger; obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger; and judging whether the heat exchanger is clogged or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
In some embodiments of the present application, the obtaining module is specifically configured to:
collecting compressor operation parameters and ambient temperature, wherein the compressor operation parameters comprise compressor exhaust temperature and pressure and compressor operation frequency;
obtaining the inlet temperature and pressure of the heat exchanger, the outlet temperature and pressure of the heat exchanger and the return air temperature and pressure of the compressor according to the operating parameters of the compressor, the ambient temperature and a predetermined first fitting equation;
obtaining the refrigerant flow of the compressor according to the compressor exhaust temperature and pressure, the compressor return air temperature and pressure and a compressor ten-coefficient model, wherein the refrigerant flow of the compressor is the refrigerant flow passing through the heat exchanger;
and obtaining the inlet-outlet enthalpy difference of the heat exchanger according to the inlet temperature and pressure of the heat exchanger, the outlet temperature and pressure of the heat exchanger and a predetermined second fitting equation.
In some embodiments of the present application, the determining module is specifically configured to:
obtaining a current heat exchange capacity difference value of the heat exchanger according to the current heat exchange capacity value and the standard heat exchange capacity value;
averaging the heat exchange capacity difference values obtained in a preset time period to obtain an average value;
and if the average value is larger than or equal to a preset average value threshold value, determining that the heat exchanger is dirty and blocked.
In some embodiments of the present application, the determining module is further specifically configured to:
if the average value is smaller than a preset average value threshold value, obtaining the filth blockage rate corresponding to each heat exchange capacity difference value in the preset time period according to the corresponding relation between the heat exchange capacity difference value of the heat exchanger and the filth blockage rate which is determined in advance;
and if the filth blockage rates are the same and are larger than a preset filth blockage rate threshold value, determining that the heat exchanger is filth-blocked.
In some embodiments of the present application, the determining module is further specifically configured to:
and if the filth blockage rates are different and increase in time sequence, determining that the heat exchanger is filth-blocked.
An air conditioning apparatus according to an embodiment of a third aspect of the present application includes: the heat exchanger fouling detection method comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, and is characterized in that the processor executes the computer program when running the computer program to realize the heat exchanger fouling detection method of the embodiment of the first aspect.
A computer-readable storage medium of an embodiment of a fourth aspect of the present application has computer-readable instructions stored thereon, which are executable by a processor to implement the heat exchanger fouling detection method of an embodiment of the first aspect.
Drawings
Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:
fig. 1 is a flow chart illustrating a method for detecting fouling of a heat exchanger according to an embodiment of the present application;
fig. 2 is a flow chart of a specific method for detecting fouling of a heat exchanger according to an embodiment of the present application;
FIG. 3 is a schematic diagram showing that the electric quantity is consumed more under different working conditions when the filth blockage rate of a heat exchanger in the air conditioning equipment is 40%;
fig. 4 shows a schematic diagram of a heat exchanger fouling detection device according to an embodiment of the present application.
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
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as upper, lower, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specified otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
The application provides a heat exchanger filth blockage detection method, a heat exchanger filth blockage detection device, air conditioning equipment and a storage medium, wherein the current heat exchange capacity value of a heat exchanger is obtained by calculating according to the flow of a refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger; calculating to obtain a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger; and judging whether the heat exchanger is clogged or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the present application are described in detail below.
Example one
Fig. 1 is a flowchart of a method for detecting fouling of a heat exchanger according to an embodiment of the present disclosure; fig. 2 is a flowchart illustrating a specific method for detecting a dirty plug of a heat exchanger according to an embodiment of the present disclosure. As shown in fig. 1, the method for detecting fouling of a heat exchanger includes:
step S101: acquiring the flow of a refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger;
step S102: obtaining the current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference;
step S103: obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger;
step S104: and judging whether the heat exchanger is dirty and blocked or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
In step S101, the refrigerant flow passing through the heat exchanger and the inlet-outlet enthalpy difference of the heat exchanger may be obtained through the following steps:
collecting compressor operation parameters and environment temperature, wherein the compressor operation parameters comprise compressor exhaust temperature Td, pressure Pd and compressor operation frequency; the compressor is connected with the heat exchanger in the air conditioner external unit. In practice, the above data can be collected by sensors already installed on the air-conditioning apparatus, for example to obtain the compressor discharge temperature Td and the pressure Pd from spot-check parameters.
Calculating to obtain the inlet temperature Tc _ in and the pressure Pc _ in of the heat exchanger, the outlet temperature Tc _ out and the pressure Pc _ out of the heat exchanger, and the return air temperature Ts and the pressure Ps of the compressor according to the operating parameters of the compressor, the ambient temperature and a predetermined first fitting equation; the above parameters calculated by fitting equations can be understood as parameters acquired by the virtual sensors, as shown in fig. 2.
Calculating the refrigerant flow of the compressor according to the discharge temperature Td and the pressure Pd of the compressor, the return temperature Ts and the pressure Ps of the compressor and a compressor ten-coefficient model, wherein the refrigerant flow of the compressor is the refrigerant flow q passing through the heat exchanger t As shown in fig. 2.
And calculating to obtain the inlet-outlet enthalpy difference delta H of the heat exchanger according to the inlet temperature Tc _ in and the pressure Pc _ in of the heat exchanger, the outlet temperature Tc _ out and the pressure Pc _ out of the heat exchanger and a predetermined second fitting equation, as shown in FIG. 2.
And the first fitting equation and the second fitting equation are obtained by fitting according to relevant theories of the compressor and the heat exchanger and a large amount of laboratory data.
In the application, various parameters of the heat exchanger can be obtained without additionally adding a sensor, so that the filthy blockage fault of the heat exchanger can be detected quickly and accurately in time.
In step S102, a current heat exchange amount of the heat exchanger may be calculated according to the refrigerant flow passing through the heat exchanger and an inlet-outlet enthalpy difference of the heat exchanger, and the obtained current heat exchange amount is used as a current heat exchange capacity value of the heat exchanger, that is, according to the refrigerant flow q t Calculating the enthalpy difference delta H of the inlet and the outlet in real time to obtain a heat exchange capacity value Q t As shown in fig. 2.
In step S103, a standard heat exchange capacity value of the heat exchanger under the current working condition is calculated according to the capacity value base plane of the heat exchanger. The base surface of the heat exchanger capacity value can be obtained by pushing a large amount of experimental data of the heat exchanger under various working conditions, and then the standard heat exchange capacity value Q of the heat exchanger under various working conditions can be obtained by real-time calculation according to the base surface of the heat exchanger capacity value 0 。
In step S104, it may be determined whether the heat exchanger is dirty or not by the following steps:
according to the current heat exchange capacity value Q t And standard heat transfer capacity value Q 0 Calculating to obtain the current heat exchange capacity difference value delta Q of the heat exchanger t ；
Calculating the difference value delta Q of the heat exchange capacity in a preset time period t The average is obtained to obtain the average value Δ Q, as shown in fig. 2.
And if the average value delta Q is larger than or equal to a preset average value threshold value A, determining that the heat exchanger is dirty and blocked. If Δ Q is less than A, a further determination is made, as shown in FIG. 2.
According to some embodiments of the present application, if the average value Δ Q is smaller than the preset average value threshold a, the heat exchanger filth blockage rate couful% and the heat exchange capability difference Δ Q are determined according to the predetermined t Calculating to obtain the filth blockage rate CouFoul corresponding to each heat exchange capacity difference value in the preset time period; the corresponding relation is obtained by training laboratory data of the heat exchange capacity difference value and the filth blockage rate of the heat exchanger in advance,the method can be used for calculating the filth blockage rate of the heat exchanger in real time.
And if the obtained filth blockage rates in the preset time period are the same and are greater than the preset filth blockage rate threshold value, determining that the heat exchanger is filth-blocked. In practice, the preset filth blockage rate threshold value can be set to be 10%, if the real-time filth blockage rate CouFoul% of the heat exchanger is kept unchanged for a certain time and exceeds 10%, the heat exchanger can be judged to be filth-blocked, and the filth blockage rate of the heat exchanger at the moment can be accurately calculated according to the relation equation.
According to some embodiments of the application, if the filth blockage rates obtained within the preset time period are different and increase in time sequence, the filth blockage of the heat exchanger can be determined, and the filth blockage rate of the heat exchanger at the time can be accurately calculated according to the relational equation.
The heat exchanger multi-parameter comprehensive utilization method and the heat exchanger multi-parameter comprehensive utilization system have the advantages that various parameters of the heat exchanger can be integrated, the filth blockage rate of the heat exchanger in each air conditioner outdoor unit can be accurately calculated by adopting the relation between the heat exchange capacity difference value and the filth blockage rate, the position of the filth blockage heat exchanger is accurately positioned, and the filth blockage condition is determined.
As the heat exchanger is dirty and blocked, the heat exchange capacity of the heat exchanger is influenced, and more electricity consumption is brought to air conditioning equipment.
According to some embodiments of the application, the electric quantity consumed by subsequent refrigeration and the heating thermal comfort time reduction ratio of the air conditioning equipment can be predicted according to the filth blockage rate of the heat exchanger, and a filth blockage hazard report is generated. And feeding back the filth blockage rate of the heat exchanger and the generated filth blockage damage report to an after-sales maintenance department so as to assist the after-sales maintenance department in positioning the filth blockage heat exchanger and cleaning the heat exchanger.
Fig. 3 is a schematic diagram showing that the electric power is consumed more under different working conditions when the filth blockage rate of the heat exchanger in the air conditioning equipment is 40%. As can be seen from FIG. 3, the amount of electricity consumed per hour in the cold state (35 ℃ C.) was 1.85 kW.h.
Aiming at the heating working condition, the air outlet temperature of an internal machine is 32 ℃ as a comfort standard, the air return temperature of the internal machine under different working conditions is calculated by simulation software, the thermal comfort hour occupancy ratio under different heat exchanger filth blockage rates is respectively calculated under the annual heating working condition (15 ℃), and is compared with the thermal comfort hour occupancy ratio of a normally-operated machine set, and the thermal comfort hour occupancy ratio reduction rate is calculated under different heat exchanger filth blockage rates.
According to the heat exchanger filth blockage detection method, the current heat exchange capacity value of the heat exchanger is obtained through calculation according to the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of the inlet and the outlet of the heat exchanger; calculating to obtain a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger; and judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
Example two
The embodiment of the application provides a heat exchanger filth blockage detection device, which corresponds to the heat exchanger filth blockage detection method of the embodiment one, and relevant points can be obtained by referring to part of the description of the embodiment one. The method embodiments described below are merely illustrative.
Fig. 4 is a schematic diagram of a heat exchanger filth blockage detection device provided in an embodiment of the present application, and as shown in fig. 4, the device 10 includes:
the acquiring module 101 is used for acquiring the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger;
the calculation module 102 is used for obtaining a current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference; obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger;
and the judging module 103 is used for judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
In some embodiments of the present application, the obtaining module 101 is specifically configured to:
collecting compressor operation parameters and ambient temperature, wherein the compressor operation parameters comprise compressor exhaust temperature and pressure and compressor operation frequency;
obtaining the inlet temperature and pressure of a heat exchanger, the outlet temperature and pressure of the heat exchanger and the return air temperature and pressure of the compressor according to the operating parameters of the compressor and the ambient temperature;
obtaining the refrigerant flow of the compressor according to the exhaust temperature and pressure of the compressor, the return temperature and pressure of the compressor and a compressor ten-coefficient model, wherein the refrigerant flow of the compressor is the refrigerant flow passing through the heat exchanger;
and obtaining the enthalpy difference of the inlet and the outlet of the heat exchanger according to the temperature and the pressure of the inlet of the heat exchanger and the temperature and the pressure of the outlet of the heat exchanger.
In some embodiments of the present application, the determining module 103 is specifically configured to:
obtaining a current heat exchange capacity difference value of the heat exchanger according to the current heat exchange capacity value and the standard heat exchange capacity value;
averaging the heat exchange capacity difference values obtained in a preset time period to obtain an average value;
and if the average value is larger than or equal to the preset average value threshold value, determining that the heat exchanger is dirty and blocked.
In some embodiments of the present application, the determining module 103 is further specifically configured to:
if the average value is smaller than the preset average value threshold value, obtaining the filth blockage rate corresponding to each heat exchange capacity difference value in the preset time period according to the corresponding relation between the heat exchange capacity difference value of the heat exchanger and the filth blockage rate;
and if the filth blockage rates are the same and are larger than a preset filth blockage rate threshold value, determining that the heat exchanger is filth-blocked.
In some embodiments of the present application, the determining module 103 is further specifically configured to:
and if the filth blockage rates are different and increase in time sequence, determining that the heat exchanger is filth-blocked.
According to the heat exchanger filth blockage detection device, the current heat exchange capacity value of the heat exchanger is obtained through calculation according to the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of the inlet and the outlet of the heat exchanger; calculating to obtain a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger; and judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value.
EXAMPLE III
The embodiment of the present application further provides an air conditioning equipment, including: the heat exchanger fouling detection system comprises a memory, a processor and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the heat exchanger fouling detection method of any one of the embodiment I. The air conditioning equipment may be a multi-split air conditioning equipment or the like, which is not limited in this application.
Specifically, the air conditioning apparatus may include: the system comprises a processor, a memory, a bus and a communication interface, wherein the processor, the communication interface and the memory are connected through the bus; the memory stores a computer program that can be executed on the processor, and the processor executes the method for detecting dirty blockage of a heat exchanger provided by any one of the foregoing embodiments when executing the computer program.
The Memory may include a high-speed Random Access Memory (RAM) and may also include a non-volatile Memory (non-volatile Memory), such as at least one disk Memory. The communication connection between the network element of the system and at least one other network element is realized through at least one communication interface (which may be wired or wireless), and the internet, a wide area network, a local network, a metropolitan area network, and the like may be used.
The bus may be an ISA bus, a PCI bus, an EISA bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. The memory is used for storing a program, and the processor executes the program after receiving an execution instruction, and the method for detecting fouling of a heat exchanger disclosed by any one of the foregoing embodiments of the present application may be applied to or implemented by the processor.
The processor may be an integrated circuit chip having signal processing capabilities. In implementation, the steps of the above method may be performed by integrated logic circuits of hardware in a processor or instructions in the form of software. The Processor may be a general-purpose Processor, and includes a Central Processing Unit (CPU), a Network Processor (NP), and the like; but may also be a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf programmable gate array (FPGA) or other programmable logic device, discrete gate or transistor logic, discrete hardware components. The various methods, steps, and logic blocks disclosed in the embodiments of the present application may be implemented or performed. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of the method disclosed in connection with the embodiments of the present application may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in a memory, and a processor reads information in the memory and completes the steps of the method in combination with hardware of the processor.
The air conditioning equipment provided by the embodiment of the application and the heat exchanger filth blockage detection method provided by the embodiment of the application have the same inventive concept and have the same beneficial effects as the method adopted, operated or realized by the air conditioning equipment.
Example four
The present embodiments also provide a computer-readable storage medium having computer-readable instructions stored thereon, where the computer-readable instructions are executable by a processor to implement the heat exchanger fouling detection method according to any one of the embodiments.
Examples of the computer-readable storage medium may also include, but are not limited to, phase change memory (PRAM), static Random Access Memory (SRAM), dynamic Random Access Memory (DRAM), other types of Random Access Memory (RAM), read Only Memory (ROM), electrically Erasable Programmable Read Only Memory (EEPROM), flash memory, or other optical and magnetic storage media, which are not described in detail herein.
The computer-readable storage medium provided by the above-mentioned embodiment of the present application and the heat exchanger filth blockage detection method provided by the embodiment of the present application have the same inventive concept, and have the same beneficial effects as the method adopted, operated or implemented by the application program stored in the computer-readable storage medium.
It should be noted that:
in the description provided herein, numerous specific details are set forth. However, it is understood that embodiments of the application may be practiced without these specific details. In some instances, well-known methods, structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the application, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the application and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed method should not be interpreted as reflecting an intention that: this application is intended to cover such departures from the present disclosure as come within known or customary practice in the art to which this invention pertains. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.
Those skilled in the art will appreciate that the modules in the device in an embodiment may be adaptively changed and disposed in one or more devices different from the embodiment. The modules or units or components in the embodiments may be combined into one module or unit or component, and furthermore, may be divided into a plurality of sub-modules or sub-units or sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the processes or elements of any method or apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features and/or processes or elements are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features included in other embodiments, rather than other features, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the following claims, any of the claimed embodiments may be used in any combination.
The various component embodiments of the present application may be implemented in hardware, or in software modules running on one or more processors, or in a combination thereof. Those skilled in the art will appreciate that a microprocessor or Digital Signal Processor (DSP) may be used in practice to implement some or all of the functions of some or all of the components in the creation apparatus of a virtual machine according to embodiments of the present application. The present application may also be embodied as apparatus or device programs (e.g., computer programs and computer program products) for performing a portion or all of the methods described herein. Such programs implementing the present application may be stored on a computer readable medium or may be in the form of one or more signals. Such a signal may be downloaded from an internet website or provided on a carrier signal or in any other form.
It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. 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 application 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.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (6)
1. A heat exchanger filth blockage detection method is characterized by comprising the following steps:
acquiring the flow of a refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger;
obtaining the current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference;
obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger;
judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value;
and judging whether the heat exchanger is dirty and blocked according to the current heat exchange capacity value and the standard heat exchange capacity value, wherein the judging step comprises the following steps:
obtaining a current heat exchange capacity difference value of the heat exchanger according to the current heat exchange capacity value and the standard heat exchange capacity value;
averaging the heat exchange capacity difference values obtained in a preset time period to obtain an average value;
if the average value is larger than or equal to a preset average value threshold value, determining that the heat exchanger is dirty and blocked;
if the average value is smaller than the preset average value threshold value, obtaining the filth blockage rate corresponding to each heat exchange capacity difference value in the preset time period according to the corresponding relation between the heat exchange capacity difference value of the heat exchanger and the filth blockage rate which is determined in advance;
if the filth blockage rates corresponding to the heat exchange capacity difference values are the same and are greater than a preset filth blockage rate threshold value, determining that the heat exchanger is filth-blocked;
and if the filth blockage rates corresponding to the heat exchange capacity difference values are different and increase in time sequence, determining that the heat exchanger is filth-blocked.
2. The method for detecting dirty plugging of a heat exchanger according to claim 1, wherein the obtaining of the refrigerant flow rate through the heat exchanger and the inlet-outlet enthalpy difference of the heat exchanger comprises:
collecting compressor operation parameters and ambient temperature, wherein the compressor operation parameters comprise compressor exhaust temperature and pressure and compressor operation frequency;
obtaining the inlet temperature and pressure of the heat exchanger, the outlet temperature and pressure of the heat exchanger and the return air temperature and pressure of the compressor according to the operating parameters of the compressor and the ambient temperature;
obtaining the refrigerant flow of the compressor according to the compressor exhaust temperature and pressure, the compressor return air temperature and pressure and a compressor ten-coefficient model, wherein the refrigerant flow of the compressor is the refrigerant flow passing through the heat exchanger;
and obtaining the enthalpy difference of the inlet and the outlet of the heat exchanger according to the temperature and the pressure of the inlet of the heat exchanger and the temperature and the pressure of the outlet of the heat exchanger.
3. A heat exchanger filth blockage detection device is characterized by comprising:
the acquisition module is used for acquiring the flow of the refrigerant passing through the heat exchanger and the enthalpy difference of an inlet and an outlet of the heat exchanger;
the calculation module is used for obtaining the current heat exchange capacity value of the heat exchanger according to the refrigerant flow and the inlet-outlet enthalpy difference; obtaining a standard heat exchange capacity value of the heat exchanger under the current working condition according to the capacity value base plane of the heat exchanger;
the judging module is used for judging whether the heat exchanger is dirty or not according to the current heat exchange capacity value and the standard heat exchange capacity value;
the judgment module is specifically configured to:
calculating to obtain a current heat exchange capacity difference value of the heat exchanger according to the current heat exchange capacity value and the standard heat exchange capacity value;
averaging the heat exchange capacity difference values obtained by calculation in a preset time period to obtain an average value;
if the average value is larger than or equal to a preset average value threshold value, determining that the heat exchanger is dirty and blocked;
if the average value is smaller than the preset average value threshold value, obtaining the filth blockage rate corresponding to each heat exchange capacity difference value in the preset time period according to the corresponding relation between the heat exchange capacity difference value of the heat exchanger and the filth blockage rate which is determined in advance;
if the filth blockage rates corresponding to the heat exchange capacity difference values are the same and are greater than a preset filth blockage rate threshold value, determining that the heat exchanger is filth-blocked;
and if the filth blockage rates corresponding to the heat exchange capacity difference values are different and increase in time sequence, determining that the heat exchanger is filth-blocked.
4. The heat exchanger filth blockage detection device according to claim 3, wherein the obtaining module is specifically configured to:
collecting compressor operation parameters and ambient temperature, wherein the compressor operation parameters comprise compressor exhaust temperature and pressure and compressor operation frequency;
obtaining the inlet temperature and pressure of a heat exchanger, the outlet temperature and pressure of the heat exchanger and the return air temperature and pressure of the compressor according to the operating parameters and the ambient temperature of the compressor;
calculating the refrigerant flow of the compressor according to the compressor exhaust temperature and pressure, the compressor return air temperature and pressure and a compressor ten-coefficient model, wherein the refrigerant flow of the compressor is the refrigerant flow passing through the heat exchanger;
and obtaining the enthalpy difference of the inlet and the outlet of the heat exchanger according to the temperature and the pressure of the inlet of the heat exchanger and the temperature and the pressure of the outlet of the heat exchanger.
5. An air conditioning apparatus comprising: memory, processor and computer program stored on the memory and executable on the processor, characterized in that the processor executes when executing the computer program to implement the method according to any of claims 1 to 2.
6. A computer readable storage medium having computer readable instructions stored thereon which are executable by a processor to implement the method of any one of claims 1 to 2.
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| CN113408130B (en) * | 2021-06-22 | 2023-10-27 | 珠海格力电器股份有限公司 | Method for diagnosing abnormality of equipment in enthalpy difference laboratory, control equipment for enthalpy difference laboratory, and computer-readable storage medium |
| CN113760003B (en) * | 2021-09-07 | 2022-03-29 | 苏州海宇新辰医疗科技有限公司 | Temperature control method, device and storage medium |
| CN114235451B (en) * | 2021-11-15 | 2023-09-26 | 青岛海尔空调电子有限公司 | Heat exchanger detection method, storage medium and electronic equipment |
| CN114354233A (en) * | 2021-12-31 | 2022-04-15 | 北京百度网讯科技有限公司 | Anomaly determination method, device, apparatus, medium, and product |
| CN114484729A (en) * | 2022-03-18 | 2022-05-13 | 上海美控智慧建筑有限公司 | Air conditioner fault tolerance control method and device, air conditioner and storage medium |
| CN114659159A (en) * | 2022-03-28 | 2022-06-24 | 青岛海尔空调器有限总公司 | Method for judging whether indoor unit of air conditioner is dirty or not and air conditioner |
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