CN111947350B - 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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- CN111947350B CN111947350B CN201910399726.XA CN201910399726A CN111947350B CN 111947350 B CN111947350 B CN 111947350B CN 201910399726 A CN201910399726 A CN 201910399726A CN 111947350 B CN111947350 B CN 111947350B
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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
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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 located Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The method comprises the steps of carrying out a first treatment on the surface of the 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 acquire 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 acquired through an internet network module, for example, and the humidity a is based on the humidity a of the area Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is reduced.
Description
Technical Field
The present invention relates to the field of heat pump defrosting technologies, and 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 the outdoor host of the air source heat pump device is often far lower than 0 ℃, and as the 0 ℃ is the frost point of water molecules under normal pressure, after the outdoor host operates for a period of time, particularly when the air humidity is high, a frost layer is easy to adhere to the surface of the evaporator, and the phenomenon of frost formation is called as frosting in the industry, and seriously hinders heat exchange between the evaporator and the air, so that the performance of the system and the service life of the compressor are greatly reduced. Generally, an air source heat pump device generally enables a defrosting function according to preset conditions, such as: a timing control defrosting method, a time+temperature defrosting method, a time+dual temperature defrosting method, and the like. The conventional mainstream air source heat pump device does not use the humidity sensor because of the price and life limitation of the sensor. However, air source heat pump devices without humidity sensing do not have a very accurate defrost initiation strategy, which may lead to premature initiation of defrost that reduces host performance, or may affect 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 timely perform defrosting operation, 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 timely perform defrosting operation, and improve product performance and service life.
The third technical problem to be solved by the invention is to provide an air source heat pump device which can timely defrost, improve the product performance and prolong the service life.
The first technical problem is solved by the following technical scheme:
a defrost control method comprising the steps of:
obtaining the regional humidity a of the region where the air source heat pump device is located Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement ；
According to the regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement Calculating according to a preset rule to obtain defrosting interval time delta t;
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 has the following beneficial effects: the humidity sensor need not be used to obtain the humidity state of the environment in which the evaporator is located, but may be, for example, via an internet networkThe module acquires the regional humidity of the region where the air source heat pump device is located and according to the regional humidity a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is reduced.
In one embodiment, the method is based on the regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement The step of calculating the defrosting interval time delta t according to a preset rule further comprises the following steps:
performing a simulation experiment, providing a test air source heat pump device, and counting humidity a of the test air source heat pump device in a plurality of different areas Simulation 1 A plurality of different ambient temperatures T Environmental simulation 1 A plurality of different condenser outlet temperatures T Condenser simulation 1 The time t from no frost to full frost Simulation 1 For a certain number of discrete times t Simulation 1 The values are analyzed and calculated, and a mathematical function model eta (a, T) of frosting time is established Environment (environment) ,T Condenser )；
Said controlling said humidity of said area a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement The step of calculating the defrosting interval time delta t according to a preset rule comprises the following steps:
according to eta (a, T Environment (environment) ,T Condenser ) Humidity of area a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement And calculating an aging correction coefficient beta corresponding to a preset interval time period in which the air source heat pump device operates to obtain defrosting interval time delta t.
In one embodiment, the method for obtaining the aging correction coefficient β corresponding to the preset interval period in which the air source heat pump device operates includes:
performing 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;
humidity a in the same region Simulation 2 Ambient temperature T Environmental simulation 2 Condenser outlet temperature T Condenser simulation 2 Under the condition, the time t required by the test air source heat pump device to run in a plurality of different preset interval time periods from no frost to full frost is obtained Simulation 2 For a plurality of discrete times t Simulation 2 Performing analysis operation, and establishing a mathematical function model theta (L) of an aging correction coefficient beta, wherein L is accumulated running time of the test air source heat pump device;
according to θ (L) and a preset interval period L in which the air source heat pump device operates Actual practice is that of And obtaining an ageing correction coefficient.
In one embodiment, the defrosting control method further includes the steps of:
acquiring the environment temperature and the coil temperature, acquiring the accumulated running time of the compressor heating operation after the last defrosting operation is finished, and acquiring the continuous running time of the compressor continuous heating operation before the defrosting operation; and when the environment temperature is judged to be smaller than a first set value, the coil temperature is judged to be smaller than a second set value, the accumulated running time is longer than the defrosting interval time delta t, and the continuous running time is longer than a third set value, defrosting operation is carried out.
Therefore, whether the defrosting operation is performed or not is controlled according to the ambient temperature, the coil temperature, the defrosting interval time delta t and the continuous operation time, so that the defrosting is more accurate, and the false defrosting is avoided.
In one embodiment, the defrosting control method further includes the steps of:
and when judging that the temperature of the coil is larger than a fourth set value or judging that the defrosting time is larger than a preset maximum defrosting time, closing the defrosting operation.
In one embodiment, the method obtains the regional humidity a of the region where the air source heat pump device is located Actual measurement The specific method of (a) is as follows:
acquiring the regional humidity a of the region where the air source heat pump device is located through an Internet network module Actual measurement 。
The second technical problem is solved by the following technical scheme:
a defrost control system comprising:
the first acquisition module is used for acquiring the regional humidity a of the region where the air source heat pump device is located Actual measurement The second acquisition module is used for acquiring the ambient temperature T of the air source heat pump device Environmental actual measurement The third acquisition module is used for acquiring the outlet temperature T of the condenser Condenser actual measurement ；
A calculation module for calculating the humidity a of the region Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement Calculating according to a preset rule to obtain defrosting interval time delta t;
and the defrosting module is used for 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 system has the beneficial effects that: the humidity sensor is not required to be adopted to acquire 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 acquired through an internet network module, for example, and the humidity a is based on the humidity a of the area Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is reduced.
In one embodiment, the defrost control system further comprises:
the system 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 coil temperature, the sixth acquisition module is used for acquiring the accumulated running time of the compressor heating work after the last defrosting operation is finished, and the seventh acquisition module is used for acquiring the continuous running time of the compressor continuous heating work before the defrosting operation;
and the defrosting module is used for performing defrosting operation when judging that the ambient temperature is smaller than a first set value, the coil temperature is smaller than a second set value, the accumulated running time is longer than the defrosting interval time delta t, and the continuous running time is longer than a third set value.
In one embodiment, the defrosting control system further includes a closing defrosting module and an eighth acquiring module, where the eighth acquiring module is configured to acquire a defrosting time; and the closing defrosting module is used for closing defrosting operation when judging that the temperature of the coil is larger than a fourth set value or judging that the defrosting time is larger 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.
Compared with the background technology, the air source heat pump device has the following beneficial effects: the humidity sensor is not required to be adopted to acquire 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 acquired through an internet network module, for example, and the humidity a is based on the humidity a of the area Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is reduced.
Drawings
FIG. 1 is a flowchart of a defrosting control method according to a first embodiment of the present invention;
FIG. 2 is a flowchart of a defrosting control method according to a second embodiment of the present invention;
FIG. 3 is a flow chart of a third embodiment of a defrost control method in accordance with an embodiment of the present invention;
FIG. 4 is a flowchart of a defrosting control method according to a fourth embodiment of the present invention;
FIG. 5 is a flowchart of 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 acquiring module 620, the second acquiring module 630, the third acquiring module 640, the calculating module 650, the defrosting module 660, the fourth acquiring module 670, the fifth acquiring module 680, the sixth acquiring module 691, the seventh acquiring module 692, the closing defrosting module 693 and the eighth acquiring module.
Detailed Description
In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.
In the description of the present invention, it should 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 a relative importance or number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.
In one embodiment, referring to fig. 1, a defrosting control method includes the steps of:
s110, acquiring the regional humidity a of the region where the air source heat pump device is located Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement ；
S120, according to the regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement Calculating according to a preset rule to obtain defrosting interval time delta t;
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 has the following beneficial effects: the humidity sensor is not required to be adopted to acquire 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 acquired through an internet network module, for example, and the humidity a is based on the humidity a of the area Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is reduced.
Further, the method further comprises steps S210 to S220 before the step S120:
s210, performing a simulation experiment, providing a test air source heat pump device, and counting humidity a of the test air source heat pump device in a plurality of different areas Simulation 1 A plurality of different ambient temperatures T Environmental simulation 1 A plurality of different condenser outlet temperatures T Condenser simulation 1 The time t from no frost to full frost Simulation 1 ；
S220, for a certain number of discrete times t Simulation 1 The values are analyzed and calculated, and a mathematical function model eta (a, T) of frosting time is established Environment (environment) ,T Condenser )。
Wherein, a mathematical function modeling tool such as MATLAB is specifically adopted to analyze and calculate a certain number of discrete time T values, and a mathematical function model eta (a, T) of frosting time is established Environment (environment) ,T Condenser )。
Further, the full frost state may be set according to actual conditions, and for example, a full frost state may be considered 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 operated.
The step S120 includes: according to eta (a, T Environment (environment) ,T Condenser ) Humidity of area a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement And obtaining the calculated defrosting interval time delta t.
In general, the test air source heat pump device gradually ages as the operating time becomes longer, and the test air source heat pump devices in different operating time periods are at the same regional humidity a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement And the corresponding defrosting interval time delta t is different. In one embodiment, further, the step S120 specifically includes: according to eta (a, T Environment (environment) ,T Condenser ) Humidity of area a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement And calculating an aging correction coefficient beta corresponding to a preset interval time period in which the air source heat pump device operates to obtain defrosting interval time delta t. Specifically, the regional humidity a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement Substituted into eta (a, T Environment (environment) ,T Condenser ) And multiplying the obtained product by the ageing correction coefficient beta to obtain defrosting interval time delta t.
Therefore, the aging of the test air source heat pump device along with the longer running time is considered, and the defrosting interval time deltat calculated under the corresponding aging degree is more accurate.
In one embodiment, referring to fig. 3, the method for obtaining the aging correction coefficient β corresponding to the preset interval period in which the air source heat pump device is operated includes:
s310, performing 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 period may specifically be 1 day, 2 days or 1 week.
S320, humidity a in the same region Simulation 2 Ambient temperature T Environmental simulation 2 Condenser outlet temperature T Condenser simulation 2 Under the condition, the time t required by the test air source heat pump device to run in a plurality of different preset interval time periods from no frost to full frost is obtained Simulation 2 ；
Specifically, for example, one of the test data is provided, and the regional humidity a Simulation 2 50% of ambient temperature T Environmental simulation 2 20 ℃ and condenser outlet temperature T Condenser simulation 2 At 5 ℃, sequentially acquiring the time t required by the test air source heat pump device to run from no frost to full frost on, for example, 1 day, 2 days, 3 days … … and 100 days Simulation 2 。
S330, for a plurality of discrete times t Simulation 2 Performing analysis operation to establish a mathematical function model theta (L) of an aging correction coefficient beta, wherein L is accumulated running time of the test air source heat pump device (namely a preset interval time period in which the test air source heat pump device runs);
specifically, for example, the test air source heat pump device is operated at, for example, day 1, day 2, and day 3, day … …, and time t required from no frost to full frost Simulation 2 And (3) performing comparative analysis operation, and establishing a mathematical function model theta (L) of the ageing correction coefficient beta.
In addition, the mathematical model function θ (L) is established 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 the one hand, the time t required from no frost to full frost in the test air source heat pump device operating in as many different preset interval time periods as possible can be obtained Simulation 2 For as many discrete times t as possible Simulation 2 And performing analysis operation to obtain theta (L). Specifically, the time t from no frost to full frost on, for example, 1 day, 2 days, 3 days … …, and 100 days can be obtained Simulation 2 The time t from no frost to full frost can be obtained by performing a comparative analysis operation Simulation 2 And performing contrast analysis operation.
On the other hand, the regional humidity a Simulation 2 Ambient temperature T Environmental simulation 2 Condenser outlet temperature T Condenser simulation 2 Are all multiple to form multiple groups of regional humidity a Simulation 2 Ambient temperature T Environmental simulation 2 Condenser outlet temperature T Condenser simulation 2 Sequentially acquiring humidity a in the multiple groups of areas Simulation 2 Ambient temperature T Environmental simulation 2 Condenser outlet temperature T Condenser simulation 2 Under the condition of (a), the time t required for the test air source heat pump device to operate from no frost to full frost in a plurality of different preset interval time periods Simulation 2 In this way, a plurality of groups t are correspondingly arranged in each different preset interval time period Simulation 2 A plurality of groups of discrete times t in the different preset interval time periods are respectively processed Simulation 2 And (3) performing analysis operation to establish a mathematical function model theta (L) of the aging correction coefficient beta. Specifically, one of the test data is selected, for example, the regional humidity a Simulation 2 50% of ambient temperature T Environmental simulation 2 20 ℃ and condenser outlet temperature T Condenser simulation 2 5 ℃; another set of test data is selected, for example, the regional humidity a Simulation 2 30% of ambient temperature T Environmental simulation 2 30 ℃ and condenser outlet temperature T Condenser simulation 2 10 ℃; a further set of test data is selected, for example, the regional humidity a Simulation 2 60% of ambient temperature T Environmental simulation 2 At 10 ℃ and condenser outlet temperature T Condenser simulation 2 Is 2 ℃. Under the 3 groups of test data, the test air source heat pump device is sequentially acquired from frostless to knots when running on, for example, 1 day, 2 days, 3 days … … and 100 daysTime t required for full frost Simulation 2 . Thus, the error can be reduced as much as possible, and the accuracy of the mathematical function model θ (L) of the aging correction coefficient β can be improved.
It will be appreciated that, for example, when the preset interval period is calculated according to 1 day and the air source heat pump device is on the 100 th day of continuous operation, substituting L as 100 into θ (L) results in the aging correction coefficient.
It should be noted that, the normal operation time refers to an operation time, which may be a total time of continuous operation of the air source heat pump device, or a total time of accumulated operation of the air source heat pump device, which is different from a placement time, where the placement time includes an operation time and a non-operation time when the air source heat pump device is not operated.
S340, according to θ (L) and a preset interval period L where the air source heat pump device operates Actual practice is that of And obtaining an ageing correction coefficient.
In one embodiment, referring to fig. 4, the defrosting control method further includes the following steps:
s410, acquiring the regional humidity a of the region where the air source heat pump device is located Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement ；
S420, according to the regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement Calculating according to a preset rule to obtain defrosting interval time delta t;
s430, acquiring the environment temperature and the coil temperature, and acquiring the accumulated running time of the compressor heating work after the last defrosting operation is finished;
s440, judging whether the ambient temperature is smaller than a first set value, entering step S450 when the ambient temperature is smaller than the first set value, and entering step S430 when the ambient temperature is not smaller than the first set value;
s450, judging whether the coil temperature is smaller than a second set value, entering a step S460 when judging that the coil temperature is smaller than the second set value, and entering a step S430 when judging that the coil temperature is not smaller than the second set value;
s460, judging whether the accumulated running time of heating is larger than the defrosting interval time delta t after the last defrosting operation of the compressor is finished, entering a step S430 when the accumulated running time is judged to be larger than the defrosting interval time delta t, and entering a step S490 when the accumulated running time is judged to be smaller than the defrosting interval time delta t;
step S490, a defrosting operation is performed.
The first setting value and the second setting value can be set according to actual conditions. Generally, no defrosting is performed when the coil temperature is above 0 ℃ and the ambient temperature is above 7 ℃.
Therefore, whether defrosting operation is performed or not is controlled according to the ambient temperature, the coil temperature and the defrosting interval time delta t, so that defrosting is more accurate, and error defrosting is avoided.
In one embodiment, referring to fig. 4, step S470 and step S480 are further included between step S460 and step S490:
s470, acquiring continuous operation time of continuous heating operation of the compressor before defrosting operation;
s480, judging whether the continuous operation time is larger than the defrosting interval time delta t, if so, entering step S480, and if so, entering step S470.
Therefore, whether the defrosting operation is performed or not is controlled according to the ambient temperature, the coil temperature, the defrosting interval time delta t and the continuous operation time, so that the defrosting is more accurate, and the false defrosting is avoided.
In one embodiment, the sequence of steps S410, S430, and S470 may be adjusted as required, or may be performed synchronously, which is not limited in this embodiment.
In one embodiment, the sequence of steps S440, S450, S460 and S480 may be adjusted according to needs, 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 and defrosting time of the coil;
s520, when the coil temperature is judged to be larger than a fourth set value or the defrosting time is judged to be larger than a preset maximum defrosting time, the step S530 is carried out; otherwise, if the coil temperature is not greater than the fourth set value and the defrosting time is not greater than the preset maximum defrosting time, step S510 is performed.
S530, closing the defrosting operation.
In one embodiment, the air source heat pump device is arranged in the region to obtain the region humidity a Actual measurement The specific method of (a) is as follows: acquiring the regional humidity a of the region where the air source heat pump device is located through an Internet network module Actual measurement . Thus, the regional humidity a of the region where the air source heat pump device is located is obtained through the Internet network module Actual measurement According to the regional humidity a Actual measurement The defrosting interval time of the air source heat pump device is adjusted in real time, so that the heat pump defrosting operation can be accurately and effectively performed. In addition, the humidity sensor does not need to be additionally arranged in the air source heat pump device, and the humidity state of the environment where the evaporator is located is obtained through the additionally arranged humidity sensor, so that the manufacturing cost of the air source heat pump device can be reduced, and the problem that the service life of the device is reduced due to the fact that the humidity sensor is easy to damage can be avoided.
Further, the environment temperature information T is also obtained through the Internet network module Environmental actual measurement Thereby according to the environmental temperature information T acquired by the Internet network module Environmental actual measurement The method comprises the steps of comparing the temperature information with the environmental temperature information obtained 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 fails according to the comparison result, and performing alarm operation when judging that the temperature sensor attached to the air source heat pump device fails. On the other hand, the defrosting interval time delta t can be calculated according to the environmental temperature information acquired by the Internet network module, so that a temperature sensor is not required to be arranged in the air source heat pump device, and the air source heat pump device can be used forThe 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 acquisition module 610, a second acquisition module 620, a third acquisition module 630, a calculation module 640, and a defrost module 650. The first obtaining module 610 is configured to obtain a regional humidity a of a region where the air source heat pump device is located Actual measurement The second obtaining module 620 is configured to obtain an ambient temperature T of the air source heat pump device Environmental actual measurement The third obtaining module 630 is configured to obtain a condenser outlet temperature T Condenser actual measurement . Specifically, the first acquiring module 610 and the second acquiring module 620 may be integrated in an internet network module, and the internet network module acquires the regional humidity a Actual measurement And/or ambient temperature T Environmental actual measurement . The calculation module 640 is configured to calculate the regional humidity a according to the regional humidity Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement And calculating according to a preset rule to obtain defrosting interval time delta t. The defrosting module 650 is configured to start a defrosting operation of a surface of the evaporator according to the defrosting interval Δt.
Compared with the background technology, the defrosting control system has the beneficial effects that: the humidity sensor is not required to be adopted to acquire 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 acquired through an internet network module, for example, and the humidity a is based on the humidity a of the area Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is 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 running time of the compressor heating operation 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 point, the coil temperature is less than a second set point, and the accumulated running time is greater than the defrosting interval time Δt.
In one embodiment, the defrost control system further includes a seventh acquisition module 691. The seventh acquisition module 691 is configured to acquire a continuous operation time of the compressor for continuous heating operation before a 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 operating time is greater than the defrosting interval Δt, and the continuous operating time is greater than a third set value.
In one embodiment, the defrost control system further includes a shut-down defrost module 692 and an eighth acquisition module 693. The eighth acquisition module 693 is configured to acquire a defrosting time. The off defrost module 692 is configured to perform an off 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 various modules in the defrost control system described above may be implemented in whole or in part by software, hardware, and combinations thereof. The above modules may be embedded in hardware or may be independent of a processor in the computer device, or may be stored in software in a memory in the computer device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, an air source heat pump apparatus includes the defrost control system of any one of the embodiments described above.
Compared with the background technology, the air source heat pump device has the following beneficial effects: the humidity sensor is not required to be adopted to acquire 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 acquired through an internet network module, for example, and the humidity a is based on the humidity a of the area Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement The defrosting interval time delta t is calculated according to a preset rule, and defrosting operation is started 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 is reduced.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A defrosting control method, characterized by comprising the steps of:
performing a simulation experiment, providing a test air source heat pump device, and counting humidity a of the test air source heat pump device in a plurality of different areas Simulation 1 A plurality of different ambient temperatures T Environmental simulation 1 A plurality of different condenser outlet temperatures T Condenser simulation 1 The time t from no frost to full frost Simulation 1 For a certain number of discrete times t Simulation 1 The values are analyzed and calculated, and a mathematical function model eta (a, T) of frosting time is established Environment (environment) ,T Condenser )；
Obtaining the regional humidity a of the region where the air source heat pump device is located Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement ；
According to eta (a, T Environment (environment) ,T Condenser ) Said regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement Calculating according to a preset rule to obtain defrosting interval time delta t;
and starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t.
2. The defrosting control method according to claim 1, characterized in that the flow rate of the refrigerant in the evaporator is controlled in accordance with η (a, T Environment (environment) ,T Condenser ) Said regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement The step of calculating the defrosting interval time delta t according to a preset rule comprises the following steps: according to eta (a, T Environment (environment) ,T Condenser ) Humidity of area a Actual measurement Ambient temperature T Environmental actual measurement Condenser outlet temperature T Condenser actual measurement And calculating an aging correction coefficient beta corresponding to a preset interval time period in which the air source heat pump device operates to obtain defrosting interval time delta t.
3. The defrosting control method according to claim 2, characterized in that the method for acquiring the aging correction coefficient β corresponding to the preset interval period in which the air source heat pump device operates is as follows:
performing 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;
humidity a in the same region Simulation 2 Ambient temperature T Environmental simulation 2 Condenser outlet temperature T Condenser simulation 2 Under the condition, the time t required by the test air source heat pump device to run in a plurality of different preset interval time periods from no frost to full frost is obtained Simulation 2 For a plurality of discrete times t Simulation 2 Performing analysis operation, and establishing a mathematical function model theta (L) of an aging correction coefficient beta, wherein L is accumulated running time of the test air source heat pump device;
according to θ (L) and a preset interval period L in which the air source heat pump device operates Actual practice is that of And obtaining an ageing correction coefficient.
4. The defrosting control method as set forth in claim 1, further comprising the step of:
acquiring the environment temperature and the coil temperature, acquiring the accumulated running time of the compressor heating operation after the last defrosting operation is finished, and acquiring the continuous running time of the compressor continuous heating operation before the defrosting operation; and when the environment temperature is judged to be smaller than a first set value, the coil temperature is judged to be smaller than a second set value, the accumulated running time is longer than the defrosting interval time delta t, and the continuous running time is longer than a third set value, defrosting operation is carried out.
5. The defrosting control method as set forth in claim 4, further comprising the step of:
and when judging that the temperature of the coil is larger than a fourth set value or judging that the defrosting time is larger than a preset maximum defrosting time, closing the defrosting operation.
6. The defrosting control method according to any one of claims 1 to 5, characterized in that the obtaining of the regional humidity a of the region where the air source heat pump device is located Actual measurement The specific method of (a) is as follows:
acquiring the regional humidity a of the region where the air source heat pump device is located through an Internet network module Actual measurement 。
7. A defrost control system, comprising:
the mathematical function model establishment module is used for performing simulation experiments, providing a test air source heat pump device and counting humidity a of the test air source heat pump device in a plurality of different areas Simulation 1 A plurality of different ambient temperatures T Environmental simulation 1 A plurality of different condenser outlet temperatures T CondenserSimulation 1 The time t from no frost to full frost Simulation 1 For a certain number of discrete times t Simulation 1 The values are analyzed and calculated, and a mathematical function model eta (a, T) of frosting time is established Environment (environment) ,T Condenser )；
The first acquisition module is used for acquiring the regional humidity a of the region where the air source heat pump device is located Actual measurement The second acquisition module is used for acquiring the ambient temperature T of the air source heat pump device Environmental actual measurement The third acquisition module is used for acquiring the outlet temperature T of the condenser Condenser actual measurement ；
A calculation module for calculating a mean value according to η (a, T Environment (environment) ,T Condenser ) Said regional humidity a Actual measurement Said ambient temperature T Environmental actual measurement The condenser outlet temperature T Condenser actual measurement Calculating according to a preset rule to obtain defrosting interval time delta t;
and the defrosting module is used for starting defrosting operation on the surface of the evaporator according to the defrosting interval time delta t.
8. The defrost control system of claim 7, further comprising:
the system 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 coil temperature, the sixth acquisition module is used for acquiring the accumulated running time of the compressor heating work after the last defrosting operation is finished, and the seventh acquisition module is used for acquiring the continuous running time of the compressor continuous heating work before the defrosting operation;
and the defrosting module is used for performing defrosting operation when judging that the ambient temperature is smaller than a first set value, the coil temperature is smaller than a second set value, the accumulated running time is longer than the defrosting interval time delta t, and the continuous running time is longer than a third set value.
9. The defrost control system of claim 8, further comprising a shut-down defrost module and an eighth acquisition module for acquiring defrost time; and the closing defrosting module is used for closing defrosting operation when judging that the temperature of the coil is larger than a fourth set value or judging that the defrosting time is larger than a preset maximum defrosting time.
10. An air source heat pump apparatus comprising a defrost control system as claimed in any one of claims 7 to 9.
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| CN114234486B (en) * | 2021-12-20 | 2023-03-31 | 广东芬尼克兹节能设备有限公司 | Heat pump defrosting control method and device, computer equipment and storage medium |
| CN114440447B (en) * | 2022-03-01 | 2023-10-03 | 温岭煌格科技咨询有限公司 | Air energy water heater capable of realizing rapid defrosting and stable water temperature and use method |
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