CN111947350A - Defrosting control method, defrosting control system and air source heat pump device - Google Patents
Defrosting control method, defrosting control system and air source heat pump device Download PDFInfo
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- CN111947350A CN111947350A CN201910399726.XA CN201910399726A CN111947350A CN 111947350 A CN111947350 A CN 111947350A CN 201910399726 A CN201910399726 A CN 201910399726A CN 111947350 A CN111947350 A CN 111947350A
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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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- 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
Abstract
The invention relates to a defrosting control method, a defrosting control system and an air source heat pump device, wherein the defrosting control method comprises the following steps: obtaining the regional humidity a of the region where the air source heat pump device is locatedMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenser(ii) a And starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t. The humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule, and according to defrostingThe defrosting operation is started on the surface of the evaporator by the frost interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
Description
Technical Field
The invention relates to the technical field of heat pump defrosting, in particular to a defrosting control method, a defrosting control system and an air source heat pump device.
Background
The air source heat pump device can be an air source heat pump water heater or an air source heat pump air conditioner. When the ambient temperature is low, the evaporation temperature of an outdoor main machine of the air source heat pump device is often far lower than 0 ℃, and the temperature of 0 ℃ is the frost point of water molecules under normal pressure, so that a frost layer is easily attached to the surface of an evaporator after the outdoor main machine operates for a period of time, particularly when the air humidity is high, the frost layer is known as frost in the industry, the frost phenomenon seriously hinders heat exchange between the evaporator and the air, and the performance of the system and the service life of a compressor are greatly reduced. Generally, an air-source heat pump apparatus generally activates a defrosting function according to preset conditions, such as: a timed defrost method, a time + temperature defrost method, a time + dual temperature defrost method, and the like. However, conventional mainstream air source heat pump devices do not use humidity sensors due to their cost and lifetime limitations. However, air source heat pump devices without humidity sensing do not have very accurate defrost initiation strategies, may produce premature defrost initiation that reduces performance of the main unit, and may initiate defrost too late that affects compressor life.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide a defrosting control method, which can perform defrosting operation in time, improve product performance and service life, and reduce product cost.
The second technical problem to be solved by the present invention is to provide a defrosting control system, which can perform defrosting operation in time, improve product performance and prolong service life.
The third technical problem to be solved by the present invention is to provide an air source heat pump device, which can perform defrosting operation in time, improve product performance and prolong service life.
The first technical problem is solved by the following technical scheme:
a defrosting control method comprises the following steps:
obtaining the regional humidity a of the region where the air source heat pump device is locatedMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenser；
According to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule;
and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t.
Compared with the background technology, the defrosting control method of the invention has the following beneficial effects: the humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule, and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
In one embodiment, the humidity a is based on the regionMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserThe method comprises the following steps of calculating defrosting interval time delta t according to a preset rule, and comprises the following steps:
carrying out simulation experiment, providing a test air source heat pump device, and counting the humidity a of the test air source heat pump device in a plurality of different areasSimulation 1A plurality of different ambient temperatures TEnvironmental simulation 1A plurality of different condenser outlet temperatures TCondenser simulation 1Time t required from no frost to full frostSimulation 1For a certain number of discrete times tSimulation 1Analyzing and calculating the value, and establishing a mathematical function model eta (a, T) of frosting timeEnvironment(s),TCondenser)；
According to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserThe step of calculating the defrosting interval time delta t according to a preset rule comprises the following steps:
according to eta (a, T)Environment(s),TCondenser) Region humidity aMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t by using the aging correction coefficient beta corresponding to the preset interval time period in which the air source heat pump device operates.
In one embodiment, the method for obtaining the aging correction coefficient β corresponding to the preset interval time period in which the air source heat pump device operates includes:
carrying out an aging simulation experiment, providing a test air source heat pump device, and dividing the normal working time of the test air source heat pump device into a plurality of preset interval time periods;
at the same local humidity aSimulation 2Ambient temperature TEnvironmental simulation 2Condenser outlet temperature TCondenser simulation 2Under the condition, acquiring the time t required by the test air source heat pump device to operate from frostless to full frosting in a plurality of different preset interval time periodsSimulation 2For a plurality of discrete times tSimulation 2Carrying out analysis operation, and establishing a mathematical function model theta (L) of the aging correction coefficient beta, wherein L is the accumulated operation time of the air source heat pump device to be tested;
according to the preset interval time period L between theta (L) and the operation of the air source heat pump devicePractice ofAnd obtaining an aging correction coefficient.
In one embodiment, the defrost control method further comprises the steps of:
acquiring the ambient temperature and the coil temperature, acquiring the accumulated running time of the heating work of the compressor after the last defrosting operation is finished, and acquiring the continuous running time of the continuous heating work of the compressor before the defrosting operation; and when the environment temperature is judged to be smaller than a first set value, the coil temperature is smaller than a second set value, the accumulated running time is larger than the defrosting interval time delta t, and the continuous running time is larger than a third set value, defrosting operation is carried out.
Therefore, whether defrosting operation is carried out or not is controlled according to the environment temperature, the coil temperature, the defrosting interval time delta t and the continuous operation time, defrosting can be more accurate, and misdefrosting is avoided.
In one embodiment, the defrost control method further comprises the steps of:
and when the temperature of the coil is judged to be greater than a fourth set value or the defrosting time is judged to be greater than the preset maximum defrosting time, the defrosting operation is closed.
In one embodiment, the area humidity a of the area where the air source heat pump device is located is obtainedMeasured in factThe specific method comprises the following steps:
obtaining the region humidity a of the region where the air source heat pump device is located through an internet network moduleMeasured in fact。
The second technical problem is solved by the following technical solutions:
a defrost control system comprising:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring the region humidity a of the region where the air source heat pump device is locatedMeasured in factThe second obtaining module is used for obtaining the ambient temperature T of the air source heat pump deviceEnvironmental surveyAnd the third acquisition module is used for acquiring the outlet temperature T of the condenserActual measurement of condenser；
A calculation module for calculating the humidity a of the regionMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule;
a defrosting module for initiating a defrosting operation on a surface of the evaporator according to the defrosting interval time Δ t.
According to the inventionThe defrosting control system has the following beneficial effects compared with the background art: the humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule, and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
In one embodiment, the defrost control system further comprises:
the defrosting control device comprises a fourth acquisition module, a fifth acquisition module, a sixth acquisition module and a seventh acquisition module, wherein the fourth acquisition module is used for acquiring the ambient temperature, the fifth acquisition module is used for acquiring the temperature of the coil, the sixth acquisition module is used for acquiring the accumulated running time of the heating work of the compressor after the last defrosting operation is finished, and the seventh acquisition module is used for acquiring the continuous running time of the continuous heating work of the compressor before the defrosting operation;
and the defrosting module is used for defrosting when the environment temperature is judged to be less than a first set value, the coil temperature is judged to be less than a second set value, the accumulated running time is greater than the defrosting interval time delta t, and the continuous running time is greater than a third set value.
In one embodiment, the defrosting control system further comprises a defrosting off module and an eighth obtaining module, wherein the eighth obtaining module is used for obtaining defrosting time; and the defrosting closing module is used for performing defrosting closing operation when judging that the temperature of the coil is greater than a fourth set value or judging that the defrosting time is greater than a preset maximum defrosting time.
The third technical problem is solved by the following technical scheme:
an air source heat pump device comprises the defrosting control system.
The invention is said toCompared with the background art, the air source heat pump device has the following beneficial effects: the humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule, and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
Drawings
FIG. 1 is a flowchart illustrating a defrosting control method according to a first embodiment of the present invention;
FIG. 2 is a flowchart illustrating a defrosting control method according to a second embodiment of the present invention;
FIG. 3 is a flowchart illustrating a defrosting control method according to a third embodiment of the present invention;
FIG. 4 is a flowchart illustrating a defrosting control method according to a fourth embodiment of the present invention;
FIG. 5 is a flowchart illustrating a defrosting control method according to a fifth embodiment of the present invention;
fig. 6 is a schematic structural diagram of a defrosting control system according to an embodiment of the present invention.
Reference numerals:
610. the first obtaining module, 620, the second obtaining module, 630, the third obtaining module, 640, the calculating module, 650, the defrosting module, 660, the fourth obtaining module, 670, the fifth obtaining module, 680, the sixth obtaining module, 691, the seventh obtaining module, 692, the closing defrosting module, 693, and the eighth obtaining module.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.
In the description of the present invention, it is to be understood that the terms "first", "second" and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In one embodiment, referring to fig. 1, a defrosting control method includes the following steps:
s110, acquiring the region humidity a of the region where the air source heat pump device is locatedMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenser；
S120, according to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule;
and S130, starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t.
Compared with the background technology, the defrosting control method of the invention has the following beneficial effects: the humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule, and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
Further, before the step S120, steps S210-S220 are further included:
s210, carrying out simulation experiments, providing a test air source heat pump device, and counting the humidity a of the test air source heat pump device in a plurality of different areasSimulation 1A plurality of different ambient temperatures TEnvironmental simulation 1A plurality of different condenser outlet temperatures TCondenser simulation 1Time t required from no frost to full frostSimulation 1；
S220, for a certain number of discrete time tSimulation 1Analyzing and calculating the value, and establishing a mathematical function model eta (a, T) of frosting timeEnvironment(s),TCondenser)。
Specifically, mathematical function modeling tools such as MATLAB are adopted to analyze and operate a certain number of discrete time T values, and a mathematical function model eta (a, T) of frosting time is establishedEnvironment(s),TCondenser)。
Further, the full frost state may be set according to actual conditions, and for example, a full frost state may be regarded when the thickness of the frost layer on the surface of the evaporator is 0.3cm or 0.5 cm.
In addition, test air source heat pump devices typically employ new products that have not been run.
The step S120 includes: according to eta (a, T)Environment(s),TCondenser) Region humidity aMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd obtaining the defrosting interval time delta t through calculation.
Generally, the test air source heat pump device is aged gradually as the operation time is longer, and the test air source heat pump devices in different operation time periods have the same regional humidity aMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd then, the corresponding defrosting interval time delta t is different. In one embodiment, the step S120 specifically includes: according to eta (a, T)Environment(s),TCondenser) Region humidity aMeasured in factAmbient temperature TEnvironmental surveyCondenser outlet temperature TActual measurement of condenserAndand calculating the defrosting interval time delta t by using the aging correction coefficient beta corresponding to the preset interval time period in which the air source heat pump device operates. Specifically, the regional humidity aMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserSubstituted into η (a, T)Environment(s),TCondenser) And then multiplying the aging correction coefficient beta to obtain the defrosting interval time delta t.
Therefore, the aging of the test air source heat pump device along with the increase of the operation time is considered, and the defrosting interval time delta t calculated under the corresponding aging degree is accurate.
In an embodiment, referring to fig. 3, the method for obtaining the aging correction coefficient β corresponding to the preset interval time period in which the air source heat pump device operates includes:
s310, carrying out an aging simulation experiment, providing a test air source heat pump device, and dividing the normal working time of the test air source heat pump device into a plurality of preset interval time periods;
the preset interval time period may be 1 day, 2 days, or 1 week.
S320, humidity a in the same regionSimulation 2Ambient temperature TEnvironmental simulation 2Condenser outlet temperature TCondenser simulation 2Under the condition, acquiring the time t required by the test air source heat pump device to operate from frostless to full frosting in a plurality of different preset interval time periodsSimulation 2；
For example, one of the test data, regional humidity a, is providedSimulation 2At 50%, ambient temperature TEnvironmental simulation 2At 20 ℃ and a condenser outlet temperature TCondenser simulation 2At 5 ℃, the time t from no frost to full frost formation of the test air source heat pump device when the test air source heat pump device operates on days 1, 2 and 3 … … and 100 daysSimulation 2。
S330, for a plurality of discrete times tSimulation 2Carrying out analysis operation, and establishing a mathematical function model theta (L) of the aging correction coefficient beta, wherein L is the time of testing the accumulative operation of the air source heat pump deviceThe time (namely the preset interval time period in which the test air source heat pump device operates);
specifically, for example, the test air source heat pump device is operated for the time t from no frost to full frost on days 1, 2 and 3, … …, 100Simulation 2And carrying out comparative analysis operation, and establishing a mathematical function model theta (L) of the aging correction coefficient beta.
Further, the mathematical model function θ (L) is created using a mathematical function modeling tool such as MATLAB.
Further, specifically, in order to improve the accuracy of the mathematical function model θ (L) of the aging correction coefficient β:
on one hand, the time t required from no frost to full frost formation when the test air source heat pump device operates in the different preset interval time periods as much as possible can be obtainedSimulation 2For as many discrete times t as possibleSimulation 2An analytical operation is performed to obtain θ (L). Specifically, the time t required from the absence of frost to the frost formation on the 100 th day of … … on days 1, 2, and 3 may be acquiredSimulation 2The time t from no frost to full frost on days 1 to 200 can be obtained by comparative analysisSimulation 2And carrying out comparative analysis operation.
On the other hand, the regional humidity aSimulation 2Ambient temperature TEnvironmental simulation 2Condenser outlet temperature TCondenser simulation 2A plurality of humidity a in the area form a plurality of groupsSimulation 2Ambient temperature TEnvironmental simulation 2Condenser outlet temperature TCondenser simulation 2Sequentially acquiring humidity a in the plurality of groups of regionsSimulation 2Ambient temperature TEnvironmental simulation 2Condenser outlet temperature TCondenser simulation 2Under the condition that the test air source heat pump device runs for the time t from no frost to full frost in a plurality of different preset interval time periodsSimulation 2Thus, a plurality of groups of t are corresponding to the operation in different preset interval time periodsSimulation 2A plurality of discrete time t groups in different preset interval time periodsSimulation 2And (5) carrying out analysis operation, and establishing a mathematical function model theta (L) of the aging correction coefficient beta. In particular, one set of test data is selected, for example, the regional humidity aSimulation 2At 50%, ambient temperature TEnvironmental simulation 2At 20 ℃ and a condenser outlet temperature TCondenser simulation 2Is 5 ℃; another set of test data is selected, for example, the regional humidity aSimulation 230% of ambient temperature TEnvironmental simulation 2At 30 ℃ and a condenser outlet temperature TCondenser simulation 2Is 10 ℃; a further set of test data is selected, for example, the regional humidity aSimulation 260% of ambient temperature TEnvironmental simulation 2At 10 ℃ and a condenser outlet temperature TCondenser simulation 2Is 2 ℃. Under the 3 sets of test data, the time t from frostless to full frosting of the test air source heat pump device to be operated on days 1, 2 and 3 … … and 100 is obtained in sequenceSimulation 2. Thus, the accuracy of the mathematical function model θ (L) of the aging correction coefficient β can be improved while reducing the error as much as possible.
It is understood that, for example, when the preset interval period is counted as 1 day, and the air source heat pump device is on the 100 th day of continuous operation, L is 100, and the aging correction coefficient is obtained by substituting L into θ (L).
It should be noted that the normal operating time refers to an operating time period, which may be a total operating time period of the air source heat pump device, or a total operating time period of the air source heat pump device, and is different from a placement time period, where the placement time period includes an operating time period and a non-operating time period during which no operation is performed.
S340, operating the air source heat pump device according to the theta (L) and the preset interval time period LPractice ofAnd obtaining an aging correction coefficient.
In one embodiment, referring to fig. 4, the defrosting control method further includes the following steps:
s410, acquiring the region humidity a of the region where the air source heat pump device is locatedMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenser；
S420, according to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule;
s430, acquiring the ambient temperature and the coil temperature, and acquiring the accumulated running time of the heating work of the compressor after the last defrosting operation is finished;
s440, judging whether the environment temperature is smaller than a first set value, if so, entering a step S450, and if not, entering a step S430;
s450, judging whether the temperature of the coil is smaller than a second set value, if so, entering the step S460, and if not, entering the step S430;
s460, judging whether the accumulated heating operation time of the compressor is greater than the defrosting interval time delta t after the last defrosting operation is finished, entering a step S430 when the accumulated heating operation time is greater than the defrosting interval time delta t, and entering a step S490 when the accumulated heating operation time is less than the defrosting interval time delta t;
step S490, a defrosting operation is performed.
The first set value and the second set value can be set according to actual conditions. Typically, when the coil temperature is above 0 ℃ and the ambient temperature is above 7 ℃, defrosting is not performed.
Therefore, whether defrosting operation is carried out or not is controlled according to the environment temperature, the coil temperature and the defrosting interval time delta t, defrosting can be more accurate, and misdefrosting is avoided.
In one embodiment, referring to fig. 4, a step S470 and a step S480 are further included between the step S460 and the step S490:
s470, acquiring the continuous operation time of the continuous heating work of the compressor before the defrosting operation;
and S480, judging whether the continuous operation time is greater than the defrosting interval time delta t, entering the step S480 when the continuous operation time is greater than the defrosting interval time delta t, and entering the step S470 when the continuous operation time is less than the defrosting interval time delta t.
Therefore, whether defrosting operation is carried out or not is controlled according to the environment temperature, the coil temperature, the defrosting interval time delta t and the continuous operation time, defrosting can be more accurate, and misdefrosting is avoided.
In an embodiment, the sequence of the steps S410, S430, and S470 may be adjusted as needed, or may be performed synchronously, which is not limited in this embodiment.
In an embodiment, the sequence of the steps S440, S450, S460, and S480 may be adjusted as needed, or may be performed synchronously, which is not limited in this embodiment.
In one embodiment, referring to fig. 5, the defrosting control method further includes the following steps:
s510, acquiring the temperature of a coil and defrosting time;
s520, when the temperature of the coil is judged to be larger than a fourth set value or the defrosting time is judged to be larger than the preset maximum defrosting time, the step S530 is executed; otherwise, if the temperature of the coil is not greater than the fourth setting value and the defrosting time is not greater than the preset maximum defrosting time, the process goes to step S510.
And S530, closing the defrosting operation.
In one embodiment, the acquiring of the region humidity a of the region where the air source heat pump device is locatedMeasured in factThe specific method comprises the following steps: obtaining the region humidity a of the region where the air source heat pump device is located through an internet network moduleMeasured in fact. Therefore, the area humidity a of the area where the air source heat pump device is located is obtained through the internet network moduleMeasured in factAccording to the regional humidity aMeasured in factThe defrosting interval time of the air source heat pump device is adjusted in real time, so that the defrosting operation of the heat pump can be accurately and effectively carried out. In addition, the humidity state of the environment where the evaporator is located is obtained through the additionally arranged humidity sensor without additionally arranging the humidity sensor in the air source heat pump device, and therefore the humidity state of the environment where the evaporator is located is obtainedThe manufacturing cost of the air source heat pump device can be reduced, and the phenomenon that the service life of the device is shortened due to the fact that the humidity sensor is easy to damage can be avoided.
Further, the environmental temperature information T is also acquired through the Internet network moduleEnvironmental surveySo as to obtain the environmental temperature information T according to the Internet network moduleEnvironmental surveyAnd comparing the ambient temperature information with the ambient temperature information acquired by the temperature sensor attached to the air source heat pump device, judging whether the temperature sensor attached to the air source heat pump device has a fault according to the comparison result, and performing alarm operation when the temperature sensor attached to the air source heat pump device has the fault. On the other hand, the defrosting interval time delta t can be calculated according to the environment temperature information acquired by the internet network module, so that a temperature sensor does not need to be arranged in the air source heat pump device, and the manufacturing cost of the air source heat pump device can be reduced.
In one embodiment, referring to fig. 6, a defrost control system includes a first obtaining module 610, a second obtaining module 620, a third obtaining module 630, a calculating module 640, and a defrost module 650. The first obtaining module 610 is used for obtaining the area humidity a of the area where the air source heat pump device is locatedMeasured in factThe second obtaining module 620 is configured to obtain an ambient temperature T of the air source heat pump deviceEnvironmental surveyThe third obtaining module 630 is used for obtaining the outlet temperature T of the condenserActual measurement of condenser. Specifically, the first obtaining module 610 and the second obtaining module 620 may be integrated into an internet network module, and the internet network module obtains the regional humidity aMeasured in factAnd/or ambient temperature TEnvironmental survey. The calculating module 640 is used for calculating the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule. The defrosting module 650 is configured to initiate a defrosting operation on the surface of the evaporator according to the defrosting interval Δ t.
The defrosting control system of the invention is similar to the background artThe beneficial effects are as follows: the humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule, and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
In one embodiment, the defrost control system further includes a fourth acquisition module 660, a fifth acquisition module 670, and a sixth acquisition module 680. The fourth obtaining module 660 is configured to obtain an ambient temperature, the fifth obtaining module 670 is configured to obtain a coil temperature, and the sixth obtaining module 680 is configured to obtain an accumulated operation time of the heating operation of the compressor after the last defrosting operation is finished. The defrosting module 650 is configured to perform a defrosting operation when it is determined that the ambient temperature is less than a first set value, the coil temperature is less than a second set value, and the accumulated operation time is greater than the defrosting interval time Δ t.
In one embodiment, the defrost control system further includes a seventh acquisition module 691. The seventh acquiring module 691 is configured to acquire a continuous operation time of the continuous heating operation of the compressor before the defrosting operation.
The defrosting module 650 is configured to perform a defrosting operation when it is determined that the ambient temperature is less than a first set value, the coil temperature is less than a second set value, the accumulated operation time is greater than the defrosting interval time Δ t, and the continuous operation time is greater than a third set value.
In one embodiment, the defrost control system further includes a close defrost module 692 and an eighth acquisition module 693. The eighth obtaining module 693 is configured to obtain a defrosting time. The close defrost module 692 is configured to perform a close defrost operation when the coil temperature is determined to be greater than a fourth set value or the defrost time is determined to be greater than a preset maximum defrost time.
The modules in the defrost control system described above may be implemented in whole or in part by software, hardware, and combinations thereof. The modules can be embedded in a hardware form or independent from a processor in the computer device, and can also be stored in a memory in the computer device in a software form, so that the processor can call and execute operations corresponding to the modules.
In one embodiment, an air-source heat pump device comprises the defrosting control system of any one of the above embodiments.
Compared with the background technology, the air source heat pump device of the invention has the following beneficial effects: the humidity sensor is not required to be adopted to obtain the humidity state of the environment where the evaporator is located, but the humidity of the area where the air source heat pump device is located can be obtained through an internet network module, and the humidity can be obtained according to the humidity a of the areaMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd calculating the defrosting interval time delta t according to a preset rule, and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t, so that the product performance and the service life can be improved, and the product cost can be reduced.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A defrosting control method is characterized by comprising the following steps:
obtaining the regional humidity a of the region where the air source heat pump device is locatedMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenser；
According to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule;
and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t.
2. The defrost control method of claim 1,
according to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserThe method comprises the following steps of calculating defrosting interval time delta t according to a preset rule, and comprises the following steps:
carrying out simulation experiment, providing a test air source heat pump device, and counting the humidity a of the test air source heat pump device in a plurality of different areasSimulation 1A plurality of different ambient temperatures TEnvironmental simulation 1A plurality of different condenser outlet temperatures TCondenser simulation 1Time t required from no frost to full frostSimulation 1For a certain number of discrete times tSimulation 1Analyzing and calculating the value, and establishing a mathematical function model eta (a, T) of frosting timeEnvironment(s),TCondenser)；
According to the region humidity aMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserThe step of calculating the defrosting interval time delta t according to a preset rule comprises the following steps:
according to eta (a, T)Environment(s),TCondenser) Region humidity aMeasured in factAmbient temperature TEnvironmental surveyAnd condenser outlet temperature TActual measurement of condenserAnd a preset interval in which the air source heat pump device operatesAnd calculating the aging correction coefficient beta corresponding to the time interval to obtain defrosting interval time delta t.
3. The defrosting control method according to claim 2, wherein the aging correction coefficient β corresponding to the preset interval time period in which the air source heat pump device operates is obtained by:
carrying out an aging simulation experiment, providing a test air source heat pump device, and dividing the normal working time of the test air source heat pump device into a plurality of preset interval time periods;
at the same local humidity aSimulation 2Ambient temperature TEnvironmental simulation 2Condenser outlet temperature TCondenser simulation 2Under the condition, acquiring the time t required by the test air source heat pump device to operate from frostless to full frosting in a plurality of different preset interval time periodsSimulation 2For a plurality of discrete times tSimulation 2Carrying out analysis operation, and establishing a mathematical function model theta (L) of the aging correction coefficient beta, wherein L is the accumulated operation time of the air source heat pump device to be tested;
according to the preset interval time period L between theta (L) and the operation of the air source heat pump devicePractice ofAnd obtaining an aging correction coefficient.
4. The defrost control method of claim 1 further comprising the steps of:
acquiring the ambient temperature and the coil temperature, acquiring the accumulated running time of the heating work of the compressor after the last defrosting operation is finished, and acquiring the continuous running time of the continuous heating work of the compressor before the defrosting operation; and when the environment temperature is judged to be smaller than a first set value, the coil temperature is smaller than a second set value, the accumulated running time is larger than the defrosting interval time delta t, and the continuous running time is larger than a third set value, defrosting operation is carried out.
5. The defrost control method of claim 4 further comprising the steps of:
and when the temperature of the coil is judged to be greater than a fourth set value or the defrosting time is judged to be greater than the preset maximum defrosting time, the defrosting operation is closed.
6. Defrosting control method according to any of claims 1 to 5, characterized in that the area humidity a of the area where the air source heat pump device is located is obtainedMeasured in factThe specific method comprises the following steps:
obtaining the region humidity a of the region where the air source heat pump device is located through an internet network moduleMeasured in fact。
7. A defrost control system, comprising:
the system comprises a first acquisition module, a second acquisition module and a third acquisition module, wherein the first acquisition module is used for acquiring the region humidity a of the region where the air source heat pump device is locatedMeasured in factThe second obtaining module is used for obtaining the ambient temperature T of the air source heat pump deviceEnvironmental surveyAnd the third acquisition module is used for acquiring the outlet temperature T of the condenserActual measurement of condenser；
A calculation module for calculating the humidity a of the regionMeasured in factThe ambient temperature TEnvironmental surveyAnd the condenser outlet temperature TActual measurement of condenserCalculating to obtain defrosting interval time delta t according to a preset rule;
a defrosting module for initiating a defrosting operation on a surface of the evaporator according to the defrosting interval time Δ t.
8. The defrost control system of claim 7, further comprising:
the defrosting control device comprises a fourth acquisition module, a fifth acquisition module, a sixth acquisition module and a seventh acquisition module, wherein the fourth acquisition module is used for acquiring the ambient temperature, the fifth acquisition module is used for acquiring the temperature of the coil, the sixth acquisition module is used for acquiring the accumulated running time of the heating work of the compressor after the last defrosting operation is finished, and the seventh acquisition module is used for acquiring the continuous running time of the continuous heating work of the compressor before the defrosting operation;
and the defrosting module is used for defrosting when the environment temperature is judged to be less than a first set value, the coil temperature is judged to be less than a second set value, the accumulated running time is greater than the defrosting interval time delta t, and the continuous running time is greater than a third set value.
9. The defrost control system of claim 8, further comprising a defrost deactivation module and an eighth acquisition module, the eighth acquisition module configured to acquire a defrost time; and the defrosting closing module is used for performing defrosting closing operation when judging that the temperature of the coil is greater than a fourth set value or judging that the defrosting time is greater than a preset maximum defrosting time.
10. An air-source heat pump apparatus comprising a defrost control system according to any one of claims 9 to 12.
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| CN111947350B (en) | 2023-05-12 |
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