CN116718237A - Air energy heat pump working data monitoring method - Google Patents
Air energy heat pump working data monitoring method Download PDFInfo
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- CN116718237A CN116718237A CN202311000357.5A CN202311000357A CN116718237A CN 116718237 A CN116718237 A CN 116718237A CN 202311000357 A CN202311000357 A CN 202311000357A CN 116718237 A CN116718237 A CN 116718237A
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- 238000000034 method Methods 0.000 title claims abstract description 67
- 238000012544 monitoring process Methods 0.000 title claims abstract description 22
- 238000010257 thawing Methods 0.000 claims abstract description 108
- 238000005265 energy consumption Methods 0.000 claims abstract description 42
- 238000010438 heat treatment Methods 0.000 claims description 35
- 230000020169 heat generation Effects 0.000 claims description 15
- 230000011218 segmentation Effects 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 4
- 238000006243 chemical reaction Methods 0.000 claims description 3
- 238000012545 processing Methods 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 5
- 239000002699 waste material Substances 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
- 230000005856 abnormality Effects 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
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- 230000007423 decrease Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/06—Heat pumps characterised by the source of low potential heat
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
- G01D21/02—Measuring two or more variables by means not covered by a single other subclass
Abstract
The invention relates to the technical field of data processing, in particular to an air energy heat pump working data monitoring method, which comprises the following steps: acquiring working data of an air energy heat pump to be detected and performance indexes of the air energy heat pump; judging whether the air energy heat pump to be detected is frosted normally or not according to the working data of the air energy heat pump to be detected; acquiring the frosting degree of the air energy heat pump to be detected when the air energy heat pump is frosted normally; obtaining defrosting cost and frosting cost of the air energy heat pump to be detected according to the frosting degree of the air energy heat pump to be detected when the air energy heat pump to be detected normally frosts; judging whether defrosting is needed according to the defrosting cost and the frosting cost of the air-source heat pump to be detected, and further adjusting the defrosting state of the air-source heat pump to be detected in real time. The invention monitors the data in real time when the air energy heat pump works, judges proper defrosting time, improves the operation efficiency of the air energy heat pump, and balances the energy consumption when the machine operates.
Description
Technical Field
The invention relates to the technical field of data processing, in particular to a method for monitoring working data of an air source heat pump.
Background
The air energy heat pump is a device for heating and refrigerating by utilizing air heat energy, and is an efficient and energy-saving energy utilization mode. Along with the development of science and technology, people are increasingly conscious of environmental protection and energy conservation, the demand of the air energy heat pump is larger and larger, every time the air energy heat pump is used in winter, the biggest challenge to the air energy heat pump is to frost, once the unit is frosted, if the unit is not timely frosted, the heating effect is not only influenced, the extra energy consumption is increased, and the unit hardware is damaged seriously, so that the unit is damaged, and the normal work is influenced.
In order to avoid the problems of abnormality, low energy utilization efficiency, high operation cost and reduced service life of the air energy heat pump equipment when the air energy heat pump is operated, the working data of the air energy heat pump is required to be monitored in real time, the defrosting state of the air energy heat pump is adjusted in real time, the operation effect and reliability of an air energy heat pump system are improved, and the energy consumption and maintenance cost are reduced.
Disclosure of Invention
The invention provides a method for monitoring working data of an air source heat pump, which aims to solve the existing problems.
The invention relates to an air energy heat pump working data monitoring method which adopts the following technical scheme:
an embodiment of the present invention provides a method for monitoring working data of an air-source heat pump, comprising the steps of:
acquiring working data of an air energy heat pump to be detected and performance indexes of the air energy heat pump;
obtaining the time required from the initial surface temperature of the air energy heat pump to be detected to the frosting starting temperature of the air energy heat pump according to the working data of the air energy heat pump to be detected; judging whether the air energy heat pump to be detected is frosted normally or not according to the time required by the initial surface temperature of the air energy heat pump to be detected to the frosting starting temperature of the air energy heat pump;
when the air energy heat pump to be detected normally frosts, acquiring the energy efficiency ratio of the air energy heat pump to be detected when the energy efficiency ratio reaches a stable state and the frosting area of the surface of the air energy heat pump to be detected; obtaining the frosting degree of the air energy heat pump to be detected according to the energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected is stable and the frosting area of the surface of the air energy heat pump to be detected;
obtaining defrosting time of the air energy heat pump to be detected according to the frosting degree of the air energy heat pump to be detected; obtaining defrosting cost of the air energy heat pump to be detected according to the defrosting time of the air energy heat pump to be detected and the performance index of the air energy heat pump; obtaining heat generation amount in the defrosting time of the air energy heat pump to be detected according to the defrosting time of the air energy heat pump to be detected; obtaining the frosting cost of the air energy heat pump to be detected according to the frosting degree of the air energy heat pump to be detected and the heat generation amount in the defrosting time of the air energy heat pump to be detected;
judging whether defrosting is needed according to the defrosting cost and the frosting cost of the air-source heat pump to be detected, and adjusting the defrosting state of the air-source heat pump to be detected.
Preferably, the acquiring the working data of the air energy heat pump to be detected and the performance index of the air energy heat pump includes the following specific steps:
collecting working data of the air energy heat pump to be detected through a sensor on the air energy heat pump to be detected, comprising: acquiring the temperature of the air energy heat pump to be detected and the indoor temperature of the air energy heat pump to be detected through a temperature sensor of the air energy heat pump to be detected; obtaining heat generated by the air energy heat pump to be detected through a heat meter of the air energy heat pump to be detected; obtaining electric energy consumed by the air energy heat pump to be detected through an electric energy meter of the air energy heat pump to be detected; acquiring an image of an external frosting area of the air energy heat pump to be detected through an image sensor of the air energy heat pump to be detected;
acquiring performance indexes of the air energy heat pump, including the frosting starting temperature of the air energy heat pump and the power consumption of unit power when the air energy heat pump is defrosted; surface heating of air energy heat pumpThe required energy consumption; the room temperature falling speed after the air energy heat pump stops heating; energy consumption required by the air energy heat pump from heating to defrosting; energy consumption required by the conversion of the air energy heat pump from defrosting to heating; air energy heat pumpIs a thermal conductivity coefficient of (c).
Preferably, the time required from the initial surface temperature of the air-source heat pump to be detected to the frosting starting temperature of the air-source heat pump is obtained according to the working data of the air-source heat pump to be detected, and the specific steps are as follows:
in the method, in the process of the invention,representing the time required from the initial surface temperature when the air-source heat pump to be detected starts to operate to the frosting starting temperature of the air-source heat pump; />The temperature of the air energy heat pump for starting frosting is shown; />The initial surface temperature of the air energy heat pump to be detected when the air energy heat pump starts to operate is represented; />Indicating the rate of rise of the surface temperature of the air-source heat pump to be detected.
Preferably, the judging whether the air energy heat pump to be detected is frosted normally is completed according to the time required by the initial surface temperature of the air energy heat pump to be detected to the frosting starting temperature of the air energy heat pump, and the method comprises the following specific steps:
acquiring the energy efficiency ratio from when the air energy heat pump to be detected starts to operate to when the air energy heat pump to be detected starts to operateThe time of beginning to descend is recorded as first time; and stopping the operation of the air energy heat pump energy to be detected if the first time is less than the time required by the initial surface temperature of the air energy heat pump to be detected when the air energy heat pump starts to operate to the temperature of the air energy heat pump to be detected for starting frosting.
Preferably, the method for obtaining the energy efficiency ratio of the air energy heat pump to be detected and the frosting area of the surface of the air energy heat pump to be detected when the energy efficiency ratio reaches a stable state comprises the following specific steps:
preset parametersObtaining the energy efficiency ratio of the air energy heat pump to be detected>Floating up and down to->When the energy efficiency ratio of the air energy heat pump to be detected reaches a steady state time period, taking the average value of the energy efficiency ratio of the air energy heat pump to be detected in the time period as the energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected reaches steady state; acquiring an image of an external frosting area of the air energy heat pump to be detected by using an image sensor of the air energy heat pump to be detected, and dividing the frosting area in the image of the external frosting area of the air energy heat pump to be detected from other areas except the frosting area by using semantic segmentation; and counting the number of pixels of the frosting area of the segmentation result to obtain the number of pixels of the frosting area of the air energy heat pump to be detected, and taking the number of pixels as the frosting area of the surface of the air energy heat pump to be detected.
Preferably, the frosting degree of the air energy heat pump to be detected is obtained according to the energy efficiency ratio of the air energy heat pump to be detected reaching stable and the frosting area of the surface of the air energy heat pump to be detected, and the method comprises the following specific steps:
in the method, in the process of the invention,indicating the frosting degree of the air energy heat pump to be detected; />The energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected reaches a stable state is represented; />Representing the frosting area of the surface of the air source heat pump to be detected; />Is a natural constant.
Preferably, the defrosting time of the air source heat pump to be detected is obtained according to the frosting degree of the air source heat pump to be detected, and the method comprises the following specific steps:
in the method, in the process of the invention,the defrosting time of the air energy heat pump to be detected is represented; />Indicating the frosting degree of the air source heat pump to be detected.
Preferably, the specific formula for obtaining the defrosting cost of the air energy heat pump to be detected according to the defrosting time of the air energy heat pump to be detected and the performance index of the air energy heat pump is as follows:
in the method, in the process of the invention,representing defrosting cost of the air source heat pump to be detected; />The defrosting time of the air energy heat pump to be detected is represented; />The unit power consumption of the air energy heat pump during defrosting is represented; />Heat pump for representing air energySurface temperature rise->The required energy consumption; />The indoor temperature when the air energy heat pump to be detected stops heating and starts defrosting is represented; />The room temperature descending speed after the air energy heat pump to be detected stops heating is represented; />Representing the energy consumption required by the air energy heat pump to convert from heating to defrosting; />Representing the energy consumption required for the air-source heat pump to switch from defrost to heating.
Preferably, the method for obtaining the heat generation amount in the defrosting time of the air source heat pump to be detected according to the defrosting time of the air source heat pump to be detected comprises the following specific steps:
according to the law of heat conduction, the heat generation amount of the air energy heat pump to be detected in the defrosting timeWherein, the method comprises the steps of, wherein,representing the thermal conductivity of an air-source heat pump, +.>Indicating the frosting area of the surface of the air source heat pump to be detected, < ->Indicating the temperature difference between the air-source heat pump to be tested and the environment,/->And the defrosting time of the air energy heat pump to be detected is represented.
Preferably, the method for obtaining the frosting cost of the air source heat pump to be detected according to the frosting degree of the air source heat pump to be detected and the heat generation amount in the defrosting time of the air source heat pump to be detected comprises the following specific steps:
in the method, in the process of the invention,representing frosting cost of the air energy heat pump to be detected; />The heat generation amount in the defrosting time of the air energy heat pump to be detected is represented; />Indicating the frosting degree of the air energy heat pump to be detected; />Representing the frosting area of the surface of the air source heat pump to be detected; />A logarithmic function based on a natural constant is represented.
The technical scheme of the invention has the beneficial effects that: aiming at the problem that if the air energy heat pump frosts in time, the heating effect is not affected, extra energy consumption is increased, and the hardware of the unit is damaged when serious, so that the unit is failed and the normal work is affected; according to the invention, whether normal frosting is carried out is judged according to the temperature of the frosting point, under the normal frosting state, the energy consumption of defrosting is compared with the energy consumption of non-defrosting under different degrees according to the change of frosting degree, and whether defrosting is started is judged; and then data are monitored in real time when the air energy heat pump works, proper defrosting time is judged, the running efficiency of the air energy heat pump is improved, and the energy consumption when the machine runs is balanced.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a flow chart of the steps of a method for monitoring the working data of an air source heat pump according to the present invention.
Detailed Description
In order to further describe the technical means and effects adopted by the invention to achieve the preset aim, the following is a detailed description of the specific implementation, structure, characteristics and effects of an air energy heat pump working data monitoring method according to the invention with reference to the accompanying drawings and the preferred embodiment. In the following description, different "one embodiment" or "another embodiment" means that the embodiments are not necessarily the same. Furthermore, the particular features, structures, or characteristics of one or more embodiments may be combined in any suitable manner.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
The following specifically describes a specific scheme of the air source heat pump working data monitoring method provided by the invention with reference to the accompanying drawings.
Referring to fig. 1, a flowchart of steps of a method for monitoring operation data of an air-source heat pump according to an embodiment of the invention is shown, the method includes the following steps:
step S001: and acquiring working data of the air energy heat pump to be detected and performance indexes of the air energy heat pump.
Specifically, working data of the air energy heat pump to be detected are acquired through a related sensor of the air energy heat pump to be detected, wherein the temperature of the air energy heat pump to be detected, the indoor temperature of the air energy heat pump to be detected and the air temperature of the air energy heat pump to be detected are acquired through a temperature sensor of the air energy heat pump to be detected; obtaining heat generated by the air energy heat pump to be detected through a heat meter of the air energy heat pump to be detected; obtaining electric energy consumed by the air energy heat pump to be detected through an electric energy meter of the air energy heat pump to be detected; acquiring an image of an external frosting area of the air energy heat pump to be detected through an image sensor of the air energy heat pump to be detected; it should be noted that, in this embodiment, the time interval for collecting the working data of the air-source heat pump to be detected is two minutes, where the collecting time interval is not specifically limited, and depends on the specific implementation situation.
It should be noted that the performance index of the air-energy heat pump varies according to the specific heat pump design, application requirement and working condition, and reference is specifically made to the relevant specifications of the air-energy heat pump and documents provided by the manufacturer.
Specifically, the performance indexes of the air energy heat pump comprise the frosting starting temperature of the air energy heat pump and the power consumption of unit power when the air energy heat pump is defrosted; surface heating of air energy heat pumpThe required energy consumption; the room temperature falling speed after the air energy heat pump stops heating; energy consumption required by the air energy heat pump from heating to defrosting; energy consumption required by the conversion of the air energy heat pump from defrosting to heating; thermal conductivity of an air-source heat pump.
So far, the working data of the air energy heat pump to be detected and the performance index of the air energy heat pump are obtained.
Step S002: judging whether the air source heat pump to be detected is frosted normally or not according to the working data of the air source heat pump to be detected.
It should be noted that, whether the air source heat pump to be detected is normal frosting needs to be judged first, if not, the air source heat pump to be detected has a problem, the meaning of monitoring the subsequent data is not great, and the operation needs to be stopped. When the air-source heat pump to be detected can normally frost, the frost degree of the air-source heat pump to be detected needs to be judged, and whether the air-source heat pump to be detected is worth defrosting operation is considered according to the frost degree of the air-source heat pump to be detected.
It is further described that a certain time is required from the initial surface temperature when the air-source heat pump to be detected starts to operate to the frosting starting temperature of the air-source heat pump to be detected, so that the frosting phenomenon can only occur on the surface of the air-source heat pump to be detected, and if the frosting phenomenon starts to occur when the frosting point temperature of the air-source heat pump to be detected is not reached, the air-source heat pump to be detected has a problem.
Specifically, the air energy heat pump to be detected is operated for two minutes, the temperature of the air energy heat pump to be detected is continuously increased, the average rate of temperature change in the process of increasing the surface temperature of the air energy heat pump to be detected is calculated through the temperature in the process of increasing the temperature recorded by a temperature sensor of the air energy heat pump to be detected, the average rate of temperature change in the process of increasing the surface temperature of the air energy heat pump to be detected is used as the surface temperature increasing rate of the air energy heat pump to be detected, wherein the temperature recorded by the temperature sensor is recorded as the surface initial temperature when the air energy heat pump to be detected starts to operate just before the air energy heat pump to be detected starts to operate; obtaining the time required from the initial surface temperature of the air energy heat pump to be detected to the frosting starting temperature of the air energy heat pump according to the working data of the air energy heat pump to be detected, wherein the calculation expression is as follows:
in the method, in the process of the invention,representing the time required from the initial surface temperature when the air-source heat pump to be detected starts to operate to the frosting starting temperature of the air-source heat pump; />The temperature of the air energy heat pump for starting frosting is shown; />The initial surface temperature of the air energy heat pump to be detected when the air energy heat pump starts to operate is represented; />Representing air energy heat pump to be detectedRate of surface temperature rise.
When the air-source heat pump to be detected just starts to operate, the energy efficiency ratio of the air-source heat pump to be detectedIs gradually raised ()>Is the ratio of heat generated to electrical energy consumed), but gradually decreases and stabilizes at a level over time; the occurrence of frosting on the surface of the air-source heat pump to be detected can cause +.>Descending; however, if the air-source heat pump to be detected starts to operate, the air-source heat pump to be detected is not yet at the frost temperature>Descent, which is clearly abnormal, indicates that the air-source heat pump to be tested itself has problems, and requires stopping operation.
Specifically, the heat generated by the air energy heat pump to be detected is obtained through the heat meter of the air energy heat pump to be detected, and the electric energy consumed by the air energy heat pump to be detected is obtained through the electric energy meter of the air energy heat pump to be detected; taking the ratio of the heat generated by the air energy heat pump to be detected and the electric energy consumed by the air energy heat pump to be detected as the energy efficiency ratio of the air energy heat pump to be detected; the energy efficiency ratio from when the air energy heat pump to be detected starts to operate to when the air energy heat pump to be detected starts to operateThe time of beginning to descend is recorded as first time; if the first time is less than the time required by the initial surface temperature of the air energy heat pump to be detected to reach the temperature of the air energy heat pump to be detected for starting frosting, the air energy heat pump to be detected has problems, and the operation needs to be stopped.
So far, the judgment of whether the air source heat pump to be detected is frosted normally is completed.
Step S003: and acquiring the frosting degree of the air energy heat pump to be detected when the air energy heat pump is frosted normally.
It should be noted that the air energy heat pump energy efficiency ratio to be detectedWhen the air energy heat pump to be detected starts to operate, the air energy heat pump to be detected gradually rises and finally the energy efficiency ratio of the air energy heat pump to be detected is +.>The air energy heat pump reaches a stable state when floating up and down to be 5%, and when frosting begins to appear on the surface of the air energy heat pump to be detected, the frost area of the surface of the air energy heat pump to be detected is increased along with the increase of the frosting area of the surface of the air energy heat pump to be detected, & lt & gt of the air energy heat pump to be detected>The trend of gradually falling is shown, when the air energy heat pump to be detected is fallen to a certain level, the air energy heat pump to be detected needs to be considered to start defrosting, and the air energy heat pump to be detected is +.>The relation between the air source heat pump to be detected and the frosting area of the surface of the air source heat pump to be detected reflects the frosting degree of the air source heat pump to be detected.
Specifically, the energy efficiency ratio of the air energy heat pump to be detected is obtainedWhen the vertical floating is 5%, the energy efficiency ratio of the air energy heat pump to be detected in the time period reaching the stable state is taken as the average value of the energy efficiency ratios of the air energy heat pumps to be detected in the time period, and the energy efficiency ratio reaches the energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected is stable; and for the surface frosting area of the air energy heat pump to be detected, acquiring an image of an external frosting area of the air energy heat pump to be detected by using an image sensor of the air energy heat pump to be detected, and dividing the frosting area in the image of the external frosting area of the air energy heat pump to be detected from other areas by using semantic segmentation. Counting the number of pixels of the frosting area of the segmentation result to obtain the number of pixels of the frosting area of the air energy heat pump to be detected, thereby obtaining the pixel to be detectedAnd measuring the frosting area of the surface of the air energy heat pump.
The frosting degree of the air energy heat pump to be detected is obtained according to the energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected is stable and the frosting area of the surface of the air energy heat pump to be detected, and the calculation expression is as follows:
in the method, in the process of the invention,indicating the frosting degree of the air energy heat pump to be detected; />The energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected reaches a stable state is represented; />Representing the frosting area of the surface of the air source heat pump to be detected; />Is a natural constant.
So far, the frosting degree of the air energy heat pump to be detected when the air energy heat pump is frosted normally is obtained.
Step S004: and obtaining the defrosting cost and the frosting cost of the air energy heat pump to be detected according to the frosting degree of the air energy heat pump to be detected when the air energy heat pump to be detected normally frosts.
It should be noted that, along with the increase of the frosting degree of the air energy heat pump to be detected, the defrosting cost of the air energy heat pump to be detected also gradually increases, but the air energy heat pump to be detected stops heating during defrosting, so that the room temperature is reduced, the user experience is affected, and the air energy heat pump to be detected does not defrost and additional operation energy consumption is increased. Therefore, the cost of defrosting the air-source heat pump to be detected needs to be obtained according to the frosting degree of the air-source heat pump to be detected, and whether the air-source heat pump to be detected is worth defrosting is judged.
Further stated, the defrosting cost factor of the air source heat pump to be detected consists of 4 parts: the energy consumption required by the air energy heat pump from heating to defrosting, the energy consumption required by the air energy heat pump from defrosting to heating, the energy consumption required by the air energy heat pump from stopping heating to recovering the temperature lost in the middle of heating again, and the defrosting energy consumption; the energy consumption of the air energy heat pump to be detected from the heating stop to the heating resumption and the defrosting energy consumption are both related to the defrosting time.
Specifically, the defrosting time of the air source heat pump to be detected is obtained according to the frosting degree of the air source heat pump to be detected, and the calculation expression is as follows:
in the method, in the process of the invention,the defrosting time of the air energy heat pump to be detected is represented; />Indicating the frosting degree of the air source heat pump to be detected.
Obtaining the defrosting cost of the air source heat pump to be detected according to the defrosting time of the air source heat pump to be detected, wherein the calculation expression is as follows:
in the method, in the process of the invention,representing defrosting cost of the air source heat pump to be detected; />The defrosting time of the air energy heat pump to be detected is represented;
the unit power consumption of the air energy heat pump during defrosting is represented; />Indicating the surface temperature rise of the air energy heat pumpThe required energy consumption; />The indoor temperature when the air energy heat pump to be detected stops heating and starts defrosting is represented; />The room temperature descending speed after the air energy heat pump to be detected stops heating is represented; />Representing the energy consumption required by the air energy heat pump to convert from heating to defrosting; />Representing the energy consumption required for the air-source heat pump to switch from defrost to heating.
It should be noted that, whether the air-source heat pump to be detected starts defrosting is defined only by the frosting degree of the air-source heat pump to be detected, which may cause frequent defrosting of the air-source heat pump to be detected, and the energy consumption problem is not considered, so that the frosting degree of the air-source heat pump to be detected needs to be combined to analyze the energy consumption aspect, and the cost of defrosting the air-source heat pump to be detected is obtained. The energy consumption is considered from two aspects: the defrosting cost of the air energy heat pump to be detected and the frosting cost of the air energy heat pump to be detected. The frequent defrosting of the air energy heat pump to be detected can cause energy consumption waste, the frosting of the air energy heat pump to be detected can also cause additional energy consumption, balance points need to be found in the two, the energy consumption waste of frequent defrosting is reduced as much as possible, and meanwhile, the influence caused by frosting is reduced as much as possible.
The frosting cost is mainly the pair of frosting and accumulation of the air source heat pump to be detectedThe impact of the drop and the additional energy consumed to maintain efficient operation. />Is the ratio of heat energy to electric energy, while maintaining the energy consumption for high-efficiency operation, which is the ratio of +.>When the energy consumption is reduced, more electric energy is required to be consumed for realizing the same heat energy, and the phase change is improved, so that the energy consumption which is required to be paid additionally is the frosting cost.
Specifically, the temperature sensor of the air energy heat pump to be detected is used for obtaining the surface temperature of the air energy heat pump to be detected and the air temperature after defrosting during defrosting, so that the temperature difference between the air energy heat pump to be detected and the environment can be obtained; calculating heat generation amount in defrosting time of the air energy heat pump to be detected by using a heat conduction law; the law of heat conduction indicates that the heat conductivity is equal to the thermal conductivity of an object multiplied by the temperature gradient, and the surface of the air-source heat pump to be tested is regarded as a medium for heat conduction.
According to the law of heat conduction, the heat generation amount of the air energy heat pump to be detected in the defrosting timeWherein (1)>Representing the thermal conductivity of an air-source heat pump, +.>Indicating the frosting area of the surface of the air source heat pump to be detected, < ->Indicating the temperature difference between the air-source heat pump to be tested and the environment,/->And the defrosting time of the air energy heat pump to be detected is represented.
Obtaining the frosting cost of the air source heat pump to be detected according to the frosting degree of the air source heat pump to be detected, wherein the calculation expression is as follows:
in the method, in the process of the invention,representing frosting cost of the air energy heat pump to be detected; />The heat generation amount in the defrosting time of the air energy heat pump to be detected is represented; />Indicating the frosting degree of the air energy heat pump to be detected; />Representing the frosting area of the surface of the air source heat pump to be detected; />A logarithmic function based on a natural constant is represented.
So far, the frosting cost and the defrosting cost of the air energy heat pump to be detected are obtained.
Step S005: judging whether defrosting is needed according to the defrosting cost and the frosting cost of the air-source heat pump to be detected, and further adjusting the defrosting state of the air-source heat pump to be detected in real time.
According to the frosting cost and the defrosting cost of the air energy heat pump to be detected, if the frosting cost of the air energy heat pump to be detected is larger than the defrosting cost of the air energy heat pump to be detected, the fact that more energy is consumed if the air energy heat pump to be detected does not defrost under the condition of generating the same heat is indicated, and therefore the air energy heat pump to be detected needs to start defrosting work.
And whether defrosting is needed or not is judged according to the defrosting cost and the frosting cost of the air energy heat pump to be detected, the defrosting state of the air energy heat pump to be detected is adjusted in real time, frosting generated during operation of the air energy heat pump is cleaned, the operation efficiency of the air energy heat pump is improved, and the heating energy consumption is saved.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather is intended to cover all modifications, equivalents, alternatives, and improvements that fall within the spirit and scope of the invention.
Claims (10)
1. An air energy heat pump working data monitoring method is characterized by comprising the following steps:
acquiring working data of an air energy heat pump to be detected and performance indexes of the air energy heat pump;
obtaining the time required from the initial surface temperature of the air energy heat pump to be detected to the frosting starting temperature of the air energy heat pump according to the working data of the air energy heat pump to be detected; judging whether the air energy heat pump to be detected is frosted normally or not according to the time required by the initial surface temperature of the air energy heat pump to be detected to the frosting starting temperature of the air energy heat pump;
when the air energy heat pump to be detected normally frosts, acquiring the energy efficiency ratio of the air energy heat pump to be detected when the energy efficiency ratio reaches a stable state and the frosting area of the surface of the air energy heat pump to be detected; obtaining the frosting degree of the air energy heat pump to be detected according to the energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected is stable and the frosting area of the surface of the air energy heat pump to be detected;
obtaining defrosting time of the air energy heat pump to be detected according to the frosting degree of the air energy heat pump to be detected; obtaining defrosting cost of the air energy heat pump to be detected according to the defrosting time of the air energy heat pump to be detected and the performance index of the air energy heat pump; obtaining heat generation amount in the defrosting time of the air energy heat pump to be detected according to the defrosting time of the air energy heat pump to be detected; obtaining the frosting cost of the air energy heat pump to be detected according to the frosting degree of the air energy heat pump to be detected and the heat generation amount in the defrosting time of the air energy heat pump to be detected;
judging whether defrosting is needed according to the defrosting cost and the frosting cost of the air-source heat pump to be detected, and adjusting the defrosting state of the air-source heat pump to be detected.
2. The method for monitoring the working data of the air-source heat pump according to claim 1, wherein the steps of obtaining the working data of the air-source heat pump to be detected and the performance index of the air-source heat pump include the following specific steps:
collecting working data of the air energy heat pump to be detected through a sensor on the air energy heat pump to be detected, comprising: acquiring the temperature of the air energy heat pump to be detected and the indoor temperature of the air energy heat pump to be detected through a temperature sensor of the air energy heat pump to be detected; obtaining heat generated by the air energy heat pump to be detected through a heat meter of the air energy heat pump to be detected; obtaining electric energy consumed by the air energy heat pump to be detected through an electric energy meter of the air energy heat pump to be detected; acquiring an image of an external frosting area of the air energy heat pump to be detected through an image sensor of the air energy heat pump to be detected;
acquiring performance indexes of the air energy heat pump, including the frosting starting temperature of the air energy heat pump and the power consumption of unit power when the air energy heat pump is defrosted; surface heating of air energy heat pumpThe required energy consumption; the room temperature falling speed after the air energy heat pump stops heating; energy consumption required by the air energy heat pump from heating to defrosting; energy consumption required by the conversion of the air energy heat pump from defrosting to heating; thermal conductivity of an air-source heat pump.
3. The method for monitoring the operation data of the air-source heat pump according to claim 2, wherein the time required from the initial surface temperature of the air-source heat pump to be detected to the frosting starting temperature of the air-source heat pump is obtained according to the operation data of the air-source heat pump to be detected, and the method comprises the following specific steps:
in the method, in the process of the invention,representing the time required from the initial surface temperature when the air-source heat pump to be detected starts to operate to the frosting starting temperature of the air-source heat pump; />The temperature of the air energy heat pump for starting frosting is shown; />The initial surface temperature of the air energy heat pump to be detected when the air energy heat pump starts to operate is represented; />Indicating the rate of rise of the surface temperature of the air-source heat pump to be detected.
4. The method for monitoring working data of an air-source heat pump according to claim 1, wherein the judging whether the air-source heat pump to be detected is frosted normally is completed according to the time required from the initial surface temperature when the air-source heat pump to be detected starts to operate to the frosting starting temperature of the air-source heat pump, and comprises the following specific steps:
acquiring the energy efficiency ratio from when the air energy heat pump to be detected starts to operate to when the air energy heat pump to be detected starts to operateThe time of beginning to descend is recorded as first time; and stopping the operation of the air energy heat pump energy to be detected if the first time is less than the time required by the initial surface temperature of the air energy heat pump to be detected when the air energy heat pump starts to operate to the temperature of the air energy heat pump to be detected for starting frosting.
5. The method for monitoring working data of an air-source heat pump according to claim 1, wherein the steps of obtaining the energy efficiency ratio of the air-source heat pump to be detected and the frosting area of the surface of the air-source heat pump to be detected when the energy efficiency ratio reaches a stable state comprise the following specific steps:
preset parametersObtaining the energy efficiency ratio of the air energy heat pump to be detected>Floating up and down to->When the energy efficiency ratio of the air energy heat pump to be detected reaches a steady state time period, taking the average value of the energy efficiency ratio of the air energy heat pump to be detected in the time period as the energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected reaches steady state; acquiring an image of an external frosting area of the air energy heat pump to be detected by using an image sensor of the air energy heat pump to be detected, and dividing the frosting area in the image of the external frosting area of the air energy heat pump to be detected from other areas except the frosting area by using semantic segmentation; and counting the number of pixels of the frosting area of the segmentation result to obtain the number of pixels of the frosting area of the air energy heat pump to be detected, and taking the number of pixels as the frosting area of the surface of the air energy heat pump to be detected.
6. The method for monitoring working data of an air-source heat pump according to claim 1, wherein the method for obtaining the frosting degree of the air-source heat pump to be detected according to the energy efficiency ratio of the air-source heat pump to be detected reaching steady state and the frosting area of the surface of the air-source heat pump to be detected comprises the following specific steps:
in the method, in the process of the invention,indicating the frosting degree of the air energy heat pump to be detected; />The energy efficiency ratio when the energy efficiency ratio of the air energy heat pump to be detected reaches a stable state is represented; />Representing the frosting area of the surface of the air source heat pump to be detected; />Is a natural constant.
7. The method for monitoring working data of an air-source heat pump according to claim 1, wherein the method for obtaining the defrosting time of the air-source heat pump to be detected according to the frosting degree of the air-source heat pump to be detected comprises the following specific steps:
in the method, in the process of the invention,the defrosting time of the air energy heat pump to be detected is represented; />Indicating the frosting degree of the air source heat pump to be detected.
8. The method for monitoring working data of an air-source heat pump according to claim 2, wherein the specific formula for obtaining the defrosting cost of the air-source heat pump to be detected according to the defrosting time of the air-source heat pump to be detected and the performance index of the air-source heat pump is as follows:
in the method, in the process of the invention,representing defrosting cost of the air source heat pump to be detected; />The defrosting time of the air energy heat pump to be detected is represented; />The unit power consumption of the air energy heat pump during defrosting is represented; />Represents the surface temperature rise of the air energy heat pump>The required energy consumption; />The indoor temperature when the air energy heat pump to be detected stops heating and starts defrosting is represented; />The room temperature descending speed after the air energy heat pump to be detected stops heating is represented; />Representing the energy consumption required by the air energy heat pump to convert from heating to defrosting; />Representing the energy consumption required for the air-source heat pump to switch from defrost to heating.
9. The method for monitoring working data of an air-source heat pump according to claim 2, wherein the method for obtaining heat generation amount in the defrosting time of the air-source heat pump to be detected according to the defrosting time of the air-source heat pump to be detected comprises the following specific steps:
according to the law of heat conduction, the heat generation amount of the air energy heat pump to be detected in the defrosting timeWherein->Representing the thermal conductivity of an air-source heat pump, +.>Indicating the frosting area of the surface of the air source heat pump to be detected, < ->Indicating the temperature difference between the air-source heat pump to be tested and the environment,/->And the defrosting time of the air energy heat pump to be detected is represented.
10. The method for monitoring working data of an air-source heat pump according to claim 1, wherein the method for obtaining the frosting cost of the air-source heat pump to be detected according to the frosting degree of the air-source heat pump to be detected and the heat generation amount in the defrosting time of the air-source heat pump to be detected comprises the following specific steps:
in the method, in the process of the invention,representing frosting cost of the air energy heat pump to be detected; />The heat generation amount in the defrosting time of the air energy heat pump to be detected is represented; />Indicating the frosting degree of the air energy heat pump to be detected; />Representing the frosting area of the surface of the air source heat pump to be detected; />A logarithmic function based on a natural constant is represented.
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