CN106016870A - Defrosting and freezing judgment method and device for unit and heat pump hot water unit - Google Patents
Defrosting and freezing judgment method and device for unit and heat pump hot water unit Download PDFInfo
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- CN106016870A CN106016870A CN201610317625.XA CN201610317625A CN106016870A CN 106016870 A CN106016870 A CN 106016870A CN 201610317625 A CN201610317625 A CN 201610317625A CN 106016870 A CN106016870 A CN 106016870A
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- 238000010257 thawing Methods 0.000 title claims abstract description 288
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 101
- 238000000034 method Methods 0.000 title claims abstract description 63
- 230000008014 freezing Effects 0.000 title claims abstract description 39
- 238000007710 freezing Methods 0.000 title claims abstract description 39
- 230000002159 abnormal effect Effects 0.000 claims description 37
- 230000008859 change Effects 0.000 claims description 30
- 239000003507 refrigerant Substances 0.000 claims description 13
- 206010060904 Freezing phenomenon Diseases 0.000 claims description 9
- 238000004891 communication Methods 0.000 claims description 8
- 230000001105 regulatory effect Effects 0.000 claims description 3
- 230000007547 defect Effects 0.000 abstract description 4
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008569 process Effects 0.000 description 22
- 238000012360 testing method Methods 0.000 description 15
- 238000012545 processing Methods 0.000 description 13
- 238000012937 correction Methods 0.000 description 7
- 238000004458 analytical method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 238000012795 verification Methods 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 3
- 238000007599 discharging Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 2
- 230000008676 import Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 238000013499 data model Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 238000010977 unit operation Methods 0.000 description 1
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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
- Defrosting Systems (AREA)
Abstract
The invention discloses a defrosting and freezing judgment method and device for a unit and a heat pump hot water unit, wherein the method comprises the following steps: setting a defrosting standard database; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter; acquiring the current frosting condition and the current defrosting parameter of the unit; and determining whether the current defrosting parameters are normal or not according to the defrosting parameters corresponding to the same frosting conditions as the current frosting conditions in the database. The scheme of the invention can overcome the defects of long time consumption, poor accuracy, low reliability and the like in the prior art, and has the beneficial effects of short time consumption, good accuracy and high reliability.
Description
Technical Field
The invention belongs to the technical field of heat pumps, and particularly relates to a defrosting and freezing judgment method and device for a unit and a heat pump hot water unit, in particular to a heat pump defrosting and freezing judgment method and device based on GPRS (general packet radio service) big data and a heat pump hot water unit.
Background
A heat pump hot water unit is an energy-saving and environment-friendly hot water supply device which can replace a boiler and is not limited by resources, and green pollution-free cold coal is adopted to absorb heat in air and produce domestic hot water with the temperature of more than 50 ℃ by applying work through a compressor.
The defrosting is needed in the running process of the heat pump hot water unit in winter, when water shortage or water cut-off occurs in the defrosting process, the water side heat exchanger is easy to freeze, long-term water shortage can cause frost cracking of the water side heat exchanger, water enters a refrigerant system, and the unit is damaged. When the unit freezes in the past, the user feeds back the unit operation abnormity unless abnormal protection occurs. And (4) checking the operation parameters of the unit one by maintenance personnel according to the feedback information to find out the reason of the abnormality of the unit, otherwise, the unit is damaged due to water inflow finally. In the process of feedback processing, the time for sending the information fed back by the user to the people tends to be long, the accuracy of manual analysis is not easy to discriminate, and the problems of untimely processing or improper processing and the like easily occur.
In the prior art, the method has the defects of long time consumption, poor accuracy, low reliability and the like.
Disclosure of Invention
The invention aims to provide a defrosting and freezing judgment method and device for a unit and a heat pump hot water unit, aiming at overcoming the defects that in the prior art, the time for sending information fed back by a user to a person is long, and the effect of short time consumption is achieved.
The invention provides a defrosting and freezing judgment method for a unit, which comprises the following steps: setting a defrosting standard database; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter; acquiring the current frosting condition and the current defrosting parameter of the unit; and determining whether the current defrosting parameters are normal or not according to the defrosting parameters corresponding to the same frosting conditions as the current frosting conditions in the database.
Optionally, obtaining a current frosting condition of the unit includes: and acquiring the current frosting condition of the unit acquired by the wireless communication module.
Optionally, determining whether the current defrosting parameter is normal comprises: and when the current defrosting parameters are consistent with the defrosting parameters under the same frosting condition in the database, determining the current defrosting parameters as normal defrosting parameters.
Optionally, determining whether the current defrosting parameter is normal further comprises: when the current defrosting parameters are inconsistent with the defrosting parameters under the same frosting condition in the database, determining whether the current defrosting parameters and the defrosting parameters under the same frosting condition in the database meet a preset positive deviation rule: if so, determining that the current defrosting parameter is a normal defrosting parameter; otherwise, determining that the current defrosting parameter is a defrosting freezing abnormal parameter and reporting the current defrosting parameter as an abnormal condition.
Optionally, the frosting condition comprises: the ambient temperature of the environment in which the unit is located, and/or the water temperature condition of the unit; and/or, the defrosting parameters comprise: establishing a standard value of at least one of defrosting time length, air suction temperature and inlet and outlet water temperature difference based on the frosting condition; accordingly, the positive deviation rule includes: and the defrosting time length is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is reduced.
Optionally, the method further comprises: checking whether the unit notified by the abnormal condition really has a defrosting and freezing phenomenon: if yes, determining that the database is correct; otherwise, determining the deviation of the database, and correcting the database.
Optionally, the method further comprises: adaptively increasing the database when the condition of the unit increases; wherein the condition for the unit addition comprises: at least one of the temperature difference between the inlet pipe and the outlet pipe of the waterway heat exchanger, the resistance change of the refrigerant side of the waterway heat exchanger and the temperature change in the water side pipe.
In accordance with the above method, another aspect of the present invention provides a defrosting and freezing determining apparatus for an assembly, including: the setting unit is used for setting a defrosting standard database; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter; the acquiring unit is used for acquiring the current frosting condition and the current defrosting parameter of the unit; and the determining unit is used for determining whether the current defrosting parameters are normal or not according to the defrosting parameters corresponding to the same frosting conditions as the current frosting conditions in the database.
Optionally, the obtaining unit includes: and acquiring the current frosting condition of the unit acquired by the wireless communication module.
Optionally, the determining unit includes: and the consistency determining module is used for determining the current defrosting parameters as normal defrosting parameters when the current defrosting parameters are consistent with the defrosting parameters under the same frosting conditions in the database.
Optionally, the determining unit further includes: a positive deviation determining module, configured to determine whether the current defrosting parameter and the defrosting parameter under the same frosting condition in the database meet a preset positive deviation rule when the current defrosting parameter is inconsistent with the defrosting parameter under the same frosting condition in the database: if so, determining that the current defrosting parameter is a normal defrosting parameter; otherwise, determining that the current defrosting parameter is a defrosting freezing abnormal parameter and reporting the current defrosting parameter as an abnormal condition.
Optionally, the frosting condition comprises: the ambient temperature of the environment in which the unit is located, and/or the water temperature condition of the unit; and/or, the defrosting parameters comprise: establishing a standard value of at least one of defrosting time length, air suction temperature and inlet and outlet water temperature difference based on the frosting condition; accordingly, the positive deviation rule includes: and the defrosting time length is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is reduced.
Optionally, the method further comprises: the correcting unit is used for verifying whether the unit notified by the abnormal condition really has the defrosting and freezing phenomenon: if yes, determining that the database is correct; otherwise, determining the deviation of the database, and correcting the database.
Optionally, the method further comprises: a regulating unit for adaptively increasing the database when the condition of the unit increases; wherein the condition for the unit addition comprises: at least one of the temperature difference between the inlet pipe and the outlet pipe of the waterway heat exchanger, the resistance change of the refrigerant side of the waterway heat exchanger and the temperature change in the water side pipe.
In accordance with another aspect of the present invention, there is provided a heat pump hot water unit, comprising: the defrosting and freezing judgment device for the unit is described above.
According to the scheme, whether the unit has the risk of defrosting and freezing is rapidly and automatically analyzed and judged according to the data collected by the GPRS and the database samples, the automation degree is high, the processing timeliness is good, and the reliability is high.
Furthermore, according to the scheme of the invention, the heat pump defrosting data is collected through the GPRS to form a database, and the data collected in real time is compared and analyzed with the database, so that whether the unit has a defrosting risk or not is judged, the judgment result is accurate and reliable, and the processing effect is high.
Furthermore, according to the scheme of the invention, the unit with defrosting and freezing can be quickly and accurately judged by comparing and analyzing the data acquired in real time with the database, and the method and the device are strong in universality and good in safety.
Therefore, according to the scheme of the invention, the problem that the time for sending the information fed back by the user to the mouth-to-person is often long in the prior art is solved by using a mode of comparing and analyzing the acquired data with the database, so that the defects of long time consumption, poor accuracy and low reliability in the prior art are overcome, and the beneficial effects of short time consumption, good accuracy and high reliability are realized.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention.
The technical solution of the present invention is further described in detail by the accompanying drawings and embodiments.
Drawings
FIG. 1 is a flow chart of an embodiment of a defrosting freeze determination method for a unit according to the present invention;
FIG. 2 is a flow diagram of one embodiment of a positive offset determination process in the method of the present invention;
FIG. 3 is a flow chart of one embodiment of a verification process in the method of the present invention;
FIG. 4 is a schematic structural diagram of an embodiment of a defrosting and freezing determining device for an assembly according to the present invention;
fig. 5 is a schematic diagram of GPRS data analysis of an embodiment of the heat pump hot water unit of the present invention.
The reference numbers in the embodiments of the present invention are as follows, in combination with the accompanying drawings:
102-a setting unit; 104-an obtaining unit; 106-a determination unit; 1062-consistency determination module; 1064-positive bias determination module; 108-a verification unit; 110-a regulating unit.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. 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.
According to an embodiment of the present invention, a defrosting freeze judging method for a unit is provided, as shown in fig. 1, which is a flow chart of an embodiment of the method of the present invention. The defrosting and freezing judgment method for the unit comprises the following steps:
at step S110, a defrosting standard database is set; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter.
Optionally, the frosting condition may include: the ambient temperature of the environment in which the unit is located, and/or the water temperature condition of the unit.
For example: the frosting condition can represent a frosting model of the unit under the conditions of specific environment temperature and specific water temperature, such as: the environmental temperature is 5 ℃, the water inlet temperature is 9 ℃, the water outlet temperature is 15 ℃, and the defrosting is carried out after the unit operates for 3 hours. The characteristics of the process (such as parameter change of the frosting process and parameter change of the defrosting process) are recorded as corresponding defrosting parameter standards under the frosting conditions of' environment temperature 5 ℃, water inlet temperature 9 ℃, water outlet temperature 15 ℃.
Optionally, the defrosting parameters may include: and constructing at least one standard value of defrosting time, air suction temperature and inlet and outlet water temperature difference based on the frosting condition.
Therefore, the universality and the reliability of judgment can be improved by limiting the defrosting parameters and the specific forms of the frosting conditions.
In one example, the unit frosting condition can be collected through a GPRS module carried by the unit. A defrosting standard database is built according to the conditions of the ambient temperature and the water temperature, a defrosting parameter standard is built according to each condition of the ambient temperature (namely the ambient temperature can be obtained through an ambient temperature sensor for example) and the water temperature (can be obtained through a water temperature sensor for example), and the more units are installed, the more complete the database is.
For example: the resulting database is constructed, see the database format shown in table 1.
Table 1: database format
Therefore, by constructing the database, whether the unit has the risk of defrosting and freezing or not can be quickly and automatically analyzed and judged according to the data collected by the GPRS and the database sample, and the method is high in reliability and good in accuracy.
In another example, the database may also be configured by way of import. For example: the testing data of the unit can be obtained and imported into the preset database.
For example: the defrosting standard database can be used as a template by manually importing factory test data (such as test data of a unit).
Therefore, the database is obtained by importing the test data, so that the flexibility is good and the reliability is high.
In step S120, the current frosting condition and the current defrosting parameter of the unit are obtained.
Optionally, the step S120 of obtaining the current frosting condition of the unit may include: and acquiring the current frosting condition of the unit collected by a wireless communication module (such as a GPRS module). The current frosting condition is obtained through the wireless communication module, the obtaining mode is simple and reliable, and the obtaining efficiency is high.
For example: current frosting conditions may include: and acquiring real-time frosting conditions acquired by the GPRS module in real time.
Therefore, the current frosting condition and the current defrosting parameter are obtained to be used as the basis for judging the defrosting freezing, the obtaining mode is simple, and the reliability is high.
At step S130, it is determined whether the current defrosting parameters are normal according to the defrosting parameters corresponding to the same frosting conditions as the current frosting conditions in the database.
For example: after the database is preliminarily formed, aiming at real-time defrosting data, the defrosting time length T and the air suction temperature T are comparedSuction deviceTemperature difference t between inlet and outlet waterInflow water-tDischarging waterAnd (5) judging whether the real-time defrosting parameters meet the standard parameters or not according to the change rule of the parameters.
For example: defrosting parameters, which may include: and parameters such as environment temperature, water inlet and outlet temperature and the like acquired by GPRS or in-plant test data.
For example: the defrosting time of 1 ten thousand units at the ambient temperature of 5 ℃ and the water inlet temperature of 9 ℃ is recorded in the database and is 3-4 minutes, but now the fact that the defrosting time of a newly-installed unit exceeds 7 minutes under the ambient temperature and water temperature condition is found through GPRS, and then the fact that the newly-installed unit has defrosting abnormality is judged.
Therefore, by comparing the real-time defrosting parameters with the database, whether the real-time defrosting parameters are normal or not can be judged so as to preliminarily judge the unit defrosting freezing state, and the reliability and the safety are high.
Optionally, the step S130 of determining whether the current defrosting parameter is normal may include: and when the current defrosting parameters are consistent with the defrosting parameters under the same frosting condition in the database, determining the current defrosting parameters as normal defrosting parameters. Through the comparison of the real-time defrosting parameters and at least one parameter of the database, whether the real-time defrosting parameters are normal or not can be preliminarily judged, the operation mode is simple, the processing reliability is high, and the accuracy is good.
For example: whether the current defrosting parameters accord with the database or not can be judged by comparing the current defrosting parameters with the change rule of at least one parameter of defrosting time, air suction temperature and water inlet and outlet temperature difference in the database.
Therefore, when the real-time defrosting parameters accord with the database, the real-time defrosting parameters are determined to be normal defrosting parameters, and the units with defrosting freezing can be judged quickly and accurately.
Optionally, the step S130 determines whether the current defrosting parameter is normal, and may further include: and when the current defrosting parameters are inconsistent with the defrosting parameters under the same frosting condition in the database, carrying out a positive deviation processing procedure.
The specific process of the positive bias process is further described below with reference to the flowchart of fig. 2, which shows an embodiment of the positive bias determination process of the method of the present invention.
Step S210, when the current defrosting parameter is inconsistent with the defrosting parameter under the same frosting condition in the database, determining whether the current defrosting parameter and the defrosting parameter under the same frosting condition in the database meet a preset positive deviation rule: if yes, go to step S220; otherwise, step S230 is performed.
Optionally, the positive deviation rule, corresponding to the defrosting parameter, may include: and the defrosting time length is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is reduced.
For example: and when the current defrosting parameters are not consistent with the defrosting parameters under the same frosting condition in the database, continuing to perform the next step, namely judging whether the real-time parameters are positive deviations.
For example: and judging whether the current defrosting parameter accords with the positive deviation rule or not by comparing at least one deviation rule that the defrosting time length of the current defrosting parameter is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is shortened compared with the database.
And step S220, determining the current defrosting parameter as a normal defrosting parameter.
For example: and (3) real-time defrosting parameters, wherein the defrosting time is shorter, the air suction temperature is higher, the temperature difference between inlet water and outlet water is smaller, and the like, so that the defrosting parameters are also judged to be normal defrosting parameters.
Step S230, determining that the current defrosting parameter is a defrosting freezing abnormal parameter, and reporting the current defrosting parameter as an abnormal condition.
For example: and if the real-time defrosting parameters do not accord with the positive deviation rule, judging that the defrosting freezing is abnormal, and synchronously reporting the abnormal condition.
Therefore, when the real-time defrosting parameters do not accord with the database, the set which does not accord with the database is screened out through secondary comparison, and the reliability and the accuracy of judgment are improved.
In an alternative embodiment, in combination with step S130, the method may further include: and verifying the defrosting and freezing phenomenon of the unit notified by the abnormal condition.
The specific process of the verification process is further described with reference to the flowchart of fig. 3, which shows an embodiment of the verification process in the method of the present invention.
Step S310, verifying whether the unit notified by the abnormal condition really has a defrosting and freezing phenomenon: if yes, go to step S320; otherwise, step S330 is performed.
For example: after the abnormal condition is reported, collecting the actual condition of the abnormal unit again, such as: the method comprises the following steps of user complaints, abnormal protection of unit defrosting, compressor damage after the unit passes through a plurality of defrosting periods, unit refrigerant leakage and other information.
Step S320, determining that the database is correct.
Step S330, determining the deviation of the database, and correcting the database.
For example: and judging whether the unit is frozen or not, if so, proving that the standard database is correct and reliable, otherwise, indicating that the database data is deviated, and returning to the correction standard database. Through data accumulation, the accuracy of the database is gradually improved, and finally the purpose of fully automatic analysis and judgment is achieved.
Therefore, whether the database deviates or not is verified through checking the defrosting freezing phenomenon of the unit judged to be abnormal in defrosting, and timely correction is carried out when the database deviates, so that the accuracy and the reliability of subsequent judgment are improved.
In an alternative embodiment, in combination with step S110, the method may further include: adaptively adding the database when the condition of the unit increases. Wherein the condition for the unit addition comprises: at least one of the temperature difference between the inlet pipe and the outlet pipe of the waterway heat exchanger, the resistance change of the refrigerant side of the waterway heat exchanger and the temperature change in the water side pipe.
For example: the parameters for judgment (such as defrosting parameters in the database) can be increased according to the unit conditions: temperature difference between an inlet pipe and an outlet pipe of the waterway heat exchanger, resistance change of a refrigerant side of the waterway heat exchanger, temperature change in a water side pipe and the like.
Therefore, the database is adjusted in time and adaptively when the unit parameters change, and the accuracy and the reliability of the judgment based on the database are improved.
Through a large number of tests, the technical scheme of the embodiment is adopted, whether the unit has the risk of defrosting and freezing is judged through rapid and automatic analysis according to the data collected by GPRS and the database samples, the automation degree is high, the processing timeliness is good, and the reliability is high.
According to the embodiment of the invention, a defrosting and freezing judgment device for the unit is also provided, which corresponds to the defrosting and freezing judgment method for the unit. Referring to fig. 4, a schematic diagram of an embodiment of the apparatus of the present invention is shown. This a defrosting freezes judgement device for unit includes: a setting unit 102, an acquisition unit 104, and a determination unit 106.
In one embodiment, the setting unit 102 may be configured to set a defrosting criteria database; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter. The specific function and processing of the setting unit 102 are referred to in step S110.
Optionally, the frosting condition may include: the ambient temperature of the environment in which the unit is located, and/or the water temperature condition of the unit.
For example: the frosting condition can represent a frosting model of the unit at a specific environment temperature and a specific water temperature, such as: the environmental temperature is 5 ℃, the water inlet temperature is 9 ℃, the water outlet temperature is 15 ℃, and the defrosting is carried out after the unit operates for 3 hours. The characteristics of the process (such as parameter change of the frosting process and parameter change of the defrosting process) are recorded as corresponding defrosting parameter standards under the frosting conditions of' environment temperature 5 ℃, water inlet temperature 9 ℃, water outlet temperature 15 ℃.
Optionally, the defrosting parameters may include: and constructing at least one standard value of defrosting time, air suction temperature and inlet and outlet water temperature difference based on the frosting condition.
In one example, the unit frosting condition can be collected through a GPRS module carried by the unit. A defrosting standard database is built according to the conditions of the ambient temperature and the water temperature, a defrosting parameter standard is built according to each condition of the ambient temperature (namely the ambient temperature can be obtained through an ambient temperature sensor for example) and the water temperature (can be obtained through a water temperature sensor for example), and the more units are installed, the more complete the database is.
For example: the resulting database is constructed, see the database format shown in table 1.
Table 1: database format
Therefore, by constructing the database, whether the unit has the risk of defrosting and freezing or not can be quickly and automatically analyzed and judged according to the data collected by the GPRS and the database sample, and the method is high in reliability and good in accuracy.
In another example, the database may also be configured by way of import. For example: the testing data of the unit can be obtained and imported into the preset database.
For example: the defrosting standard database can be used as a template by manually importing factory test data (such as test data of a unit).
Therefore, the database is obtained by importing the test data, so that the flexibility is good and the reliability is high.
In an embodiment, the obtaining unit 104 may be configured to obtain a current frosting condition and a current frosting parameter of the unit. The specific function and processing of the acquisition unit 104 are referred to in step S120.
Optionally, the obtaining unit 104 may include: and acquiring the current frosting condition of the unit collected by a wireless communication module (such as a GPRS module). The current frosting condition is obtained through the wireless communication module, the obtaining mode is simple and reliable, and the obtaining efficiency is high.
For example: current frosting conditions may include: and acquiring real-time frosting conditions acquired by the GPRS module in real time.
Therefore, the current frosting condition and the current defrosting parameter are obtained to be used as the basis for judging the defrosting freezing, the obtaining mode is simple, and the reliability is high.
In an embodiment, the determining unit 106 may be configured to determine whether the current defrosting parameter is normal according to a defrosting parameter corresponding to the same frosting condition as the current frosting condition in the database. The specific function and processing of the determination unit 106 are referred to in step S130.
For example: after the database is preliminarily formed, aiming at real-time defrosting data, the defrosting time length T and the air suction temperature T are comparedSuction deviceTemperature difference t between inlet and outlet waterInflow water-tDischarging waterAnd (5) judging whether the real-time defrosting parameters meet the standard parameters or not according to the change rule of the parameters.
For example: defrosting parameters, which may include: and parameters such as environment temperature, water inlet and outlet temperature and the like acquired by GPRS or in-plant test data.
For example: the defrosting time of 1 ten thousand units at the ambient temperature of 5 ℃ and the water inlet temperature of 9 ℃ is recorded in the database and is 3-4 minutes, but now the fact that the defrosting time of a newly-installed unit exceeds 7 minutes under the ambient temperature and water temperature condition is found through GPRS, and then the fact that the newly-installed unit has defrosting abnormality is judged.
Therefore, by comparing the real-time defrosting parameters with the database, whether the real-time defrosting parameters are normal or not can be judged so as to preliminarily judge the unit defrosting freezing state, and the reliability and the safety are high.
Optionally, the determining unit 106 may include: consistency determination module 1062.
In one example, the consistency determining module 1062 is configured to determine that the current defrosting parameter is a normal defrosting parameter when the current defrosting parameter is consistent with the defrosting parameter under the same frosting condition in the database. Through the comparison of the real-time defrosting parameters and at least one parameter of the database, whether the real-time defrosting parameters are normal or not can be preliminarily judged, the operation mode is simple, the processing reliability is high, and the accuracy is good.
For example: whether the current defrosting parameters accord with the database or not can be judged by comparing the current defrosting parameters with the change rule of at least one parameter of defrosting time, air suction temperature and water inlet and outlet temperature difference in the database.
Therefore, when the real-time defrosting parameters accord with the database, the real-time defrosting parameters are determined to be normal defrosting parameters, and the units with defrosting freezing can be judged quickly and accurately.
Optionally, the determining unit 106 may further include: a positive offset determination module 1064.
In one example, the positive deviation determining module 1064 may be configured to determine whether the current defrosting parameter and the defrosting parameter under the same frosting condition in the database conform to a preset positive deviation rule when the current defrosting parameter and the defrosting parameter under the same frosting condition in the database do not conform to each other: if so, determining that the current defrosting parameter is a normal defrosting parameter; otherwise, determining that the current defrosting parameter is a defrosting freezing abnormal parameter and reporting the current defrosting parameter as an abnormal condition. The specific functions and processes of the positive deviation determination module 1064 are described in step S210 to step S230.
Optionally, the positive deviation rule, corresponding to the defrosting parameter, may include: and the defrosting time length is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is reduced.
For example: and when the current defrosting parameters are not consistent with the defrosting parameters under the same frosting condition in the database, continuing to perform the next step, namely judging whether the real-time parameters are positive deviations.
For example: and judging whether the current defrosting parameter accords with the positive deviation rule or not by comparing at least one deviation rule that the defrosting time length of the current defrosting parameter is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is shortened compared with the database.
For example: and (3) real-time defrosting parameters, wherein the defrosting time is shorter, the air suction temperature is higher, the temperature difference between inlet water and outlet water is smaller, and the like, so that the defrosting parameters are also judged to be normal defrosting parameters.
For example: and if the real-time defrosting parameters do not accord with the positive deviation rule, judging that the defrosting freezing is abnormal, and synchronously reporting the abnormal condition.
Therefore, when the real-time defrosting parameters do not accord with the database, the set which does not accord with the database is screened out through secondary comparison, and the reliability and the accuracy of judgment are improved.
In an alternative embodiment, the combination determination unit 106 may further include: and a correction unit 108.
In an example, the correcting unit 108 may be configured to verify whether the unit notified by the abnormal condition actually has a frost freezing phenomenon: if yes, determining that the database is correct; otherwise, determining the deviation of the database, and correcting the database. The specific functions and processes of the correction unit 108 are shown in steps S310 to S330.
For example: after the abnormal condition is reported, collecting the actual condition of the abnormal unit again, such as: the method comprises the following steps of user complaints, abnormal protection of unit defrosting, compressor damage after the unit passes through a plurality of defrosting periods, unit refrigerant leakage and other information.
For example: and judging whether the unit is frozen or not, if so, proving that the standard database is correct and reliable, otherwise, indicating that the database data is deviated, and returning to the correction standard database. Through data accumulation, the accuracy of the database is gradually improved, and finally the purpose of fully automatic analysis and judgment is achieved.
Therefore, whether the database deviates or not is verified through checking the defrosting freezing phenomenon of the unit judged to be abnormal in defrosting, and timely correction is carried out when the database deviates, so that the accuracy and the reliability of subsequent judgment are improved.
In an alternative embodiment, the combination setting unit 102 may further include: an adjustment unit 110.
In one example, the adjustment unit 110 may be configured to adaptively add the database when the condition of the unit increases. Wherein the condition for the unit addition comprises: at least one of the temperature difference between the inlet pipe and the outlet pipe of the waterway heat exchanger, the resistance change of the refrigerant side of the waterway heat exchanger and the temperature change in the water side pipe.
For example: the parameters for judgment (such as defrosting parameters in the database) can be increased according to the unit conditions: temperature difference between an inlet pipe and an outlet pipe of the waterway heat exchanger, resistance change of a refrigerant side of the waterway heat exchanger, temperature change in a water side pipe and the like.
Therefore, the database is adjusted in time and adaptively when the unit parameters change, and the accuracy and the reliability of the judgment based on the database are improved.
Since the processes and functions implemented by the apparatus of this embodiment substantially correspond to the embodiments, principles and examples of the method shown in fig. 1 to 3, the description of this embodiment is not detailed, and reference may be made to the related descriptions in the foregoing embodiments, which are not repeated herein.
Through a large number of tests, the technical scheme of the invention is adopted, the heat pump defrosting data is collected through the GPRS to form the database, and the data collected in real time is compared and analyzed with the database, so that whether the unit has the risk of defrosting and frosting is judged, the judgment result is accurate and reliable, and the treatment effect is high.
According to the embodiment of the invention, the heat pump hot water unit corresponding to the defrosting freezing judgment device for the unit is also provided. This heat pump hot water unit includes: the defrosting and freezing judgment device for the unit is described above.
For example: referring to an example shown in fig. 5, the defrosting and freezing judgment process of the heat pump hot water unit may include:
step 1, collecting unit defrosting parameters through a GPRS module. The unit defrosting parameters can comprise: the unit is located at ambient temperature and water temperature conditions.
For example: the defrosting parameters can comprise: the defrosting time is long, the defrosting water inlet and outlet temperature difference is small, the defrosting inlet pipe temperature is changed, the defrosting air suction and exhaust temperature is changed, and the defrosting low-pressure and high-pressure change is large.
For example: the parameters can be acquired by GPRS, the GPRS is randomly installed and used, each set is provided with a GPRS device, and the parameters can be collected into a database; in addition, the test parameters in the factory can be imported into the GPRS database.
And 2, constructing a defrosting standard database according to the environment temperature and water temperature conditions, constructing a defrosting parameter standard under each environment temperature and water temperature condition, and enabling the database to be more complete as more units are installed.
Alternatively, the defrosting standard database can be imported into factory test data manually as a template.
Step 3, after the database is preliminarily formed, aiming at real-time defrosting data, comparing defrosting time length T and air suction temperature TSuction deviceTemperature difference t between inlet and outlet waterInflow water-tDischarging waterAnd (5) judging whether the real-time defrosting parameters meet the standard parameters or not according to the change rule of the parameters. If yes, executing step 4; otherwise, step 5 is executed.
Step 4, judging the defrosting parameters to be normal if the defrosting parameters are met; if not, continuing to the next step, and judging whether the real-time parameter is a positive deviation, if so: and the defrosting time is shorter, the air suction temperature is higher, the temperature difference between inlet water and outlet water is smaller, and the like, so that the defrosting parameters are also judged to be normal defrosting parameters.
And 5, if not, judging that the defrosting is abnormal, and synchronously reporting the abnormal condition.
And 6, finally, collecting the actual conditions of the abnormal unit again, such as: the method comprises the steps of judging whether a unit is frozen or not according to information such as user complaints, unit defrosting abnormal protection, compressor damage after the unit passes through a plurality of defrosting periods, unit refrigerant leakage and the like, if so, proving that a standard database is correct and reliable, otherwise, explaining that the database data is deviated, and returning to a correction standard database. Through data accumulation, the accuracy of the database is gradually improved, and finally the purpose of fully automatic analysis and judgment is achieved.
For example: the process of revising the standard database may be: for example: the method comprises the steps of collecting parameters of a unit of a certain model for the first time and using the parameters as standard data, later finding that the unit is abnormal when running for a short time, collecting the running parameters of another unit of the model for the next time and having no problem, correcting the original standard data into the unit data collected for the second time, and obtaining more and more accurate standard data when more and more data models exist.
In addition, based on the above constructed and/or imported database, the parameters for judgment can be increased according to the unit conditions: temperature difference between an inlet pipe and an outlet pipe of the waterway heat exchanger, resistance change of a refrigerant side of the waterway heat exchanger, temperature change in a water side pipe and the like.
Since the processing and functions of the heat pump hot water unit of this embodiment are basically corresponding to the embodiment, principle and example of the device shown in fig. 4, the description of this embodiment is not given in detail, and reference may be made to the related description in the foregoing embodiment, which is not described herein again.
Through a large number of tests, the technical scheme of the invention can realize quick and accurate judgment of the units with frost melting and freezing by comparing and analyzing the data acquired in real time with the database, and has strong universality and good safety.
In summary, it is readily understood by those skilled in the art that the advantageous modes described above can be freely combined and superimposed without conflict.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (15)
1. A defrosting and freezing judgment method for a unit is characterized by comprising the following steps:
setting a defrosting standard database; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter;
acquiring the current frosting condition and the current defrosting parameter of the unit;
and determining whether the current defrosting parameters are normal or not according to the defrosting parameters corresponding to the same frosting conditions as the current frosting conditions in the database.
2. The method of claim 1, wherein obtaining current frost conditions of the unit comprises:
and acquiring the current frosting condition of the unit acquired by the wireless communication module.
3. The method of claim 1 or 2, wherein determining whether the current defrost parameter is normal comprises:
and when the current defrosting parameters are consistent with the defrosting parameters under the same frosting condition in the database, determining the current defrosting parameters as normal defrosting parameters.
4. The method of claim 3, wherein determining whether the current defrost parameter is normal further comprises:
when the current defrosting parameters are inconsistent with the defrosting parameters under the same frosting condition in the database, determining whether the current defrosting parameters and the defrosting parameters under the same frosting condition in the database meet a preset positive deviation rule:
if so, determining that the current defrosting parameter is a normal defrosting parameter;
otherwise, determining that the current defrosting parameter is a defrosting freezing abnormal parameter and reporting the current defrosting parameter as an abnormal condition.
5. The method of claim 4,
the frosting condition comprises: the ambient temperature of the environment in which the unit is located, and/or the water temperature condition of the unit; and/or the presence of a gas in the gas,
the defrosting parameters comprise: establishing a standard value of at least one of defrosting time length, air suction temperature and inlet and outlet water temperature difference based on the frosting condition; accordingly, the number of the first and second electrodes,
the positive deviation rule includes: and the defrosting time length is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is reduced.
6. The method of claim 4 or 5, further comprising:
checking whether the unit notified by the abnormal condition really has a defrosting and freezing phenomenon:
if yes, determining that the database is correct;
otherwise, determining the deviation of the database, and correcting the database.
7. The method of any one of claims 1-6, further comprising:
adaptively increasing the database when the condition of the unit increases; wherein,
the unit addition condition comprises the following steps: at least one of the temperature difference between the inlet pipe and the outlet pipe of the waterway heat exchanger, the resistance change of the refrigerant side of the waterway heat exchanger and the temperature change in the water side pipe.
8. A defrosting and freezing judgment device for a unit is characterized by comprising:
the setting unit is used for setting a defrosting standard database; the database, comprising: the corresponding relation between the frosting condition and the defrosting parameter;
the acquiring unit is used for acquiring the current frosting condition and the current defrosting parameter of the unit;
and the determining unit is used for determining whether the current defrosting parameters are normal or not according to the defrosting parameters corresponding to the same frosting conditions as the current frosting conditions in the database.
9. The apparatus of claim 8, wherein the obtaining unit comprises:
and acquiring the current frosting condition of the unit acquired by the wireless communication module.
10. The apparatus according to claim 8 or 9, wherein the determining unit comprises:
and the consistency determining module is used for determining the current defrosting parameters as normal defrosting parameters when the current defrosting parameters are consistent with the defrosting parameters under the same frosting conditions in the database.
11. The apparatus of claim 10, wherein the determining unit further comprises:
a positive deviation determining module, configured to determine whether the current defrosting parameter and the defrosting parameter under the same frosting condition in the database meet a preset positive deviation rule when the current defrosting parameter is inconsistent with the defrosting parameter under the same frosting condition in the database:
if so, determining that the current defrosting parameter is a normal defrosting parameter;
otherwise, determining that the current defrosting parameter is a defrosting freezing abnormal parameter and reporting the current defrosting parameter as an abnormal condition.
12. The apparatus of claim 11,
the frosting condition comprises: the ambient temperature of the environment in which the unit is located, and/or the water temperature condition of the unit; and/or the presence of a gas in the gas,
the defrosting parameters comprise: establishing a standard value of at least one of defrosting time length, air suction temperature and inlet and outlet water temperature difference based on the frosting condition; accordingly, the number of the first and second electrodes,
the positive deviation rule includes: and the defrosting time length is shortened, the air suction temperature is increased, and the temperature difference between inlet water and outlet water is reduced.
13. The apparatus of claim 11 or 12, further comprising:
the correcting unit is used for verifying whether the unit notified by the abnormal condition really has the defrosting and freezing phenomenon:
if yes, determining that the database is correct;
otherwise, determining the deviation of the database, and correcting the database.
14. The apparatus of any one of claims 8-13, further comprising:
a regulating unit for adaptively increasing the database when the condition of the unit increases; wherein,
the unit addition condition comprises the following steps: at least one of the temperature difference between the inlet pipe and the outlet pipe of the waterway heat exchanger, the resistance change of the refrigerant side of the waterway heat exchanger and the temperature change in the water side pipe.
15. A heat pump water heater assembly, comprising: a defrosting and freezing judgment device for an aggregate according to any one of claims 8 to 14.
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| CN201610317625.XA CN106016870B (en) | 2016-05-13 | 2016-05-13 | Defrosting and freezing judgment method and device for unit and heat pump hot water unit |
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| CN201610317625.XA CN106016870B (en) | 2016-05-13 | 2016-05-13 | Defrosting and freezing judgment method and device for unit and heat pump hot water unit |
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| CN110332716A (en) * | 2019-07-16 | 2019-10-15 | 珠海格力电器股份有限公司 | defrosting control method and device for heat pump water heater and heat pump water heater |
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| CN106016870B (en) | 2018-02-16 |
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