CN109269019B - Defrosting control method and device and heating equipment - Google Patents
Defrosting control method and device and heating equipment Download PDFInfo
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- CN109269019B CN109269019B CN201811176888.9A CN201811176888A CN109269019B CN 109269019 B CN109269019 B CN 109269019B CN 201811176888 A CN201811176888 A CN 201811176888A CN 109269019 B CN109269019 B CN 109269019B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2140/00—Control inputs relating to system states
- F24F2140/20—Heat-exchange fluid temperature
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Abstract
The application relates to a defrosting control method and device and heating equipment, and belongs to the technical field of defrosting control. The defrosting control method comprises the following steps: acquiring outdoor fan current when heating equipment performs heating operation; determining whether to carry out defrosting control on the heating equipment according to the current of the outdoor fan; and when the defrosting control is determined, carrying out the defrosting control on the heating equipment. Through the application, unnecessary defrosting actions can be reduced, the problems that the unnecessary energy is wasted and the heating effect is reduced due to frequent defrosting under the condition of no frost or slight frosting can be solved, and then the heating effect is improved, and the experience comfort of a user is improved.
Description
Technical Field
The application belongs to the technical field of defrosting control, and particularly relates to a defrosting control method and device and heating equipment.
Background
When the surface temperature of the fins of the external fin heat exchanger of the air source heat pump chamber is lower than the dew point temperature of air and lower than 0 ℃, the surface of the fin heat exchanger can be frosted, the frosting increases the thermal resistance between the air and the fin heat exchanger, meanwhile, the frost layer increases the air flow resistance, reduces the air flow, and further reduces the heat exchange capacity of the fin heat exchanger.
The air source heat pump is seriously frosted under the working condition of low temperature and high humidity, and defrosting is needed to improve the heating effect of the unit in time. The most common defrosting control method at present is a time-temperature timing defrosting method which has a good effect under the conditions of low temperature and high humidity. However, the defrosting is easily misjudged under the condition of low temperature and low humidity, for example, the defrosting is still frequently carried out under the condition of no frost or slight frosting, so that unnecessary defrosting actions are generated, on one hand, energy waste is caused, on the other hand, the heating effect of the air source heat pump system is reduced, and the comfort of user experience is also reduced.
Disclosure of Invention
In order to overcome the problems in the related art at least to a certain extent, the application provides a defrosting control method, a defrosting control device and heating equipment, which are beneficial to reducing unnecessary defrosting actions, improving heating effects, reducing unnecessary energy waste and improving the experience comfort of users.
In order to achieve the purpose, the following technical scheme is adopted in the application:
in a first aspect,
the application provides a defrosting control method, which comprises the following steps:
acquiring outdoor fan current when heating equipment performs heating operation;
determining whether to carry out defrosting control on the heating equipment according to the outdoor fan current;
and when the defrosting control is determined, carrying out the defrosting control on the heating equipment.
Further, the acquiring of the outdoor fan current when the heating device is in heating operation includes:
judging whether the heating equipment enters a heating mode or not;
and if the heating mode is entered, acquiring the heating operation duration of the heating equipment, and acquiring the outdoor fan current of the heating equipment when the heating operation duration of the heating equipment reaches a first preset duration.
Further, the determining whether to perform defrosting control on the heating device according to the outdoor fan current includes:
obtaining the current change rate of the outdoor fan according to the current of the outdoor fan;
and determining whether to carry out defrosting control on the heating equipment according to the outdoor fan current and/or the outdoor fan current change rate.
Further, obtaining the outdoor fan current change rate according to the outdoor fan current includes:
and calculating the current change rate of the outdoor fan through a preset formula according to the current of the outdoor fan.
Further, the preset formula is as follows: Δ I ═ I (I)2-I1) V (T/2), where T is a preset duration and Δ I isRate of change of outdoor fan current, I1Is the average value of the outdoor fan current of the previous T/2 time length in the T time length, I2The average value of the outdoor fan current of the time length T/2 after the time length T.
Further, the determining whether to perform defrosting control on the heating device according to the outdoor fan current and/or the outdoor fan current change rate includes:
judging whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition, and determining to perform defrosting control on the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition; or,
judging whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, acquiring the temperature of an outdoor heat exchanger of the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, and judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition;
and if the current of the outdoor fan and/or the current change rate of the outdoor fan meet the first preset condition and the temperature of an outdoor heat exchanger of the heating equipment meets the second preset condition, determining to carry out defrosting control on the heating equipment.
Further, the first preset condition includes:
the current of the outdoor fan is greater than or equal to a preset threshold current;
the current change rate of the outdoor fan is greater than or equal to a preset threshold current change rate; or,
within a second preset time, the outdoor fan current is continuously smaller than the preset threshold current, and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate.
Further, the method further comprises:
the current of the outdoor fan is obtained, and meanwhile, the frequency of the outdoor fan is also obtained;
acquiring a preset threshold current and a preset threshold current change rate corresponding to the outdoor fan frequency according to a preset corresponding relationship, wherein the acquired preset threshold current and the acquired preset threshold current change rate are used for being compared with the outdoor fan current and the outdoor fan current change rate in a one-to-one correspondence manner, and the corresponding relationship comprises the following steps: at least one outdoor fan frequency, each outdoor fan frequency corresponding to a preset threshold current and a preset threshold current change rate.
Further, the second preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is less than or equal to a first preset threshold temperature.
Further, when it is determined to perform defrosting control, performing defrosting control on the heating apparatus includes:
when the defrosting control is determined, controlling the heating equipment to start defrosting;
in the defrosting process, acquiring the temperature of an outdoor heat exchanger of the heating equipment;
judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a third preset condition or not, and controlling the heating equipment to stop defrosting and controlling the heating equipment to heat again when the third preset condition is met.
Further, the third preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is greater than a second preset threshold temperature.
In a second aspect of the present invention,
the application provides a defrosting control device includes:
the acquisition module is used for acquiring outdoor fan current when the heating equipment is in heating operation;
the determining module is used for determining whether defrosting control is carried out on the heating equipment according to the outdoor fan current;
and the control module is used for carrying out defrosting control on the heating equipment when the defrosting control is determined.
Further, the obtaining module is specifically configured to:
judging whether the heating equipment enters a heating mode or not;
and if the heating mode is entered, acquiring the heating operation duration of the heating equipment, and acquiring the outdoor fan current of the heating equipment when the heating operation duration of the heating equipment reaches a first preset duration.
Further, the determining module is specifically configured to:
obtaining the current change rate of the outdoor fan according to the current of the outdoor fan;
and determining whether to carry out defrosting control on the heating equipment according to the outdoor fan current and/or the outdoor fan current change rate.
Further, obtaining the outdoor fan current change rate according to the outdoor fan current includes:
and calculating the current change rate of the outdoor fan through a preset formula according to the current of the outdoor fan.
Further, the preset formula is as follows: Δ I ═ I (I)2-I1) (T/2), wherein T is preset time length, delta I is current change rate of the outdoor fan, and I1Is the average value of the outdoor fan current of the previous T/2 time length in the T time length, I2The average value of the outdoor fan current of the time length T/2 after the time length T.
Further, the determining whether to perform defrosting control on the heating device according to the outdoor fan current and/or the outdoor fan current change rate includes:
judging whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition, and determining to perform defrosting control on the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition; or,
judging whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, acquiring the temperature of an outdoor heat exchanger of the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, and judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition;
and if the current of the outdoor fan and/or the current change rate of the outdoor fan meet the first preset condition and the temperature of an outdoor heat exchanger of the heating equipment meets the second preset condition, determining to carry out defrosting control on the heating equipment.
Further, the first preset condition includes:
the current of the outdoor fan is greater than or equal to a preset threshold current;
the current change rate of the outdoor fan is greater than or equal to a preset threshold current change rate; or,
within a second preset time, the outdoor fan current is continuously smaller than the preset threshold current, and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate.
Further, the current of the outdoor fan is obtained, and meanwhile, the frequency of the outdoor fan is also obtained;
acquiring a preset threshold current and a preset threshold current change rate corresponding to the outdoor fan frequency according to a preset corresponding relationship, wherein the acquired preset threshold current and the acquired preset threshold current change rate are used for being compared with the outdoor fan current and the outdoor fan current change rate in a one-to-one correspondence manner, and the corresponding relationship comprises the following steps: at least one outdoor fan frequency, each outdoor fan frequency corresponding to a preset threshold current and a preset threshold current change rate.
Further, the second preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is less than or equal to a first preset threshold temperature.
Further, the control module is specifically configured to: when the defrosting control is determined, controlling the heating equipment to start defrosting;
in the defrosting process, acquiring the temperature of an outdoor heat exchanger of the heating equipment;
judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a third preset condition or not, and controlling the heating equipment to stop defrosting and controlling the heating equipment to heat again when the third preset condition is met.
Further, the third preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is greater than a second preset threshold temperature.
In a third aspect,
the application provides a heating apparatus, comprising: a controller employing the method of any one of the above.
Further, the heating equipment is an air source heat pump.
This application adopts above technical scheme, possesses following beneficial effect at least:
whether this application is right according to obtaining the outdoor fan current when heating equipment heats the operation the heating equipment control of defrosting can help reducing the unnecessary defrosting action, can solve and frequently change the problem that the frost leads to the unnecessary energy waste and reduce the effect of heating under the slight condition of frostless or frosting, and then realize promoting the effect of heating to and promote user's experience travelling comfort.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic flow chart of a defrosting control method according to an embodiment of the present application;
fig. 2 is a schematic structural diagram of a defrosting control device according to an embodiment of the present application;
fig. 3 is a schematic structural diagram of a heating apparatus according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be described in detail below. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without making any creative effort, shall fall within the protection scope of the present application.
When the defrosting control is performed by setting the defrosting timing time in the related art, for example, defrosting is still frequently performed under the condition of no frost or slight frosting, so that unnecessary defrosting actions are generated, on one hand, energy waste is caused, on the other hand, the heating effect of the air source heat pump system is reduced, and accordingly, the comfort of user experience is also reduced.
In order to solve the above problems, the present application provides a solution for performing defrosting control according to an outdoor fan current, and the feasibility of performing defrosting control according to an outdoor fan current in the present application is described below by taking air source heat pump heating as an example.
When air source heat pump heats, fin heat exchanger frosts, and the frost layer blocks up passageway between the fin, has increased the air flow resistance, under this condition, can lead to the increase of outdoor fan electric current, and the frost layer is knot thicker more and thicker more, and the air flow resistance is bigger and bigger, and fan electric current can be bigger and bigger simultaneously. Thus, defrosting control can be performed according to the outdoor fan current.
Fig. 1 is a schematic flow chart of a defrosting control method according to an embodiment of the present application, and as shown in fig. 1, the defrosting control method includes the following steps:
and S101, acquiring outdoor fan current when heating equipment is in heating operation.
For obtaining the outdoor fan current, the current obtained to the outdoor fan may be detected by a current sensor.
For the timing of obtaining the current of the outdoor fan, in an embodiment, the current data of the outdoor fan is obtained in real time after the heating device enters the heating mode. In this way, there may be a problem that the acquired outdoor fan current data is more, which causes a greater pressure for data processing.
It should be noted that although there is the above-mentioned problem that the real-time acquisition of outdoor fan current data is started after the heating device enters the heating mode, it is not represented in this application as an option to exclude this as a feasible solution.
In another embodiment, the obtaining of the outdoor fan current when the heating device is in heating operation includes:
judging whether the heating equipment enters a heating mode or not;
and if the heating mode is entered, acquiring the heating operation duration of the heating equipment, and acquiring the outdoor fan current of the heating equipment when the heating operation duration of the heating equipment reaches a first preset duration, for example, 15 minutes.
According to the scheme of the embodiment, the outdoor fan current is not acquired during the first preset time, the outdoor fan current is acquired only after the first preset time, and the outdoor heat exchanger does not frost immediately after the heating equipment enters the heating mode.
The time for acquiring the current of the outdoor fan is controlled through the first preset time length, so that the processing pressure on the current data can be effectively reduced. In practical application, the preferable specific duration of the first preset duration can be obtained according to multiple tests so as to obtain a preferable time for obtaining the current of the outdoor fan.
And S102, determining whether defrosting control is carried out on the heating equipment or not according to the outdoor fan current.
In one embodiment, whether to perform the defrosting control on the heating apparatus may be determined only according to the outdoor fan current, and in comparison with the determination of whether to perform the defrosting control according to time, in the case of no frost or slight frost, whether to perform the defrosting control only according to the outdoor fan current may also achieve an effect of reducing unnecessary defrosting actions.
However, whether defrosting control is carried out or not is determined only according to the current of the outdoor fan, and in practical application, the formation of the defrosting time is determined only by a single determination, and the determined defrosting time is probably not the most suitable defrosting time.
It should be noted that although the determination of whether to perform defrosting control based on only the outdoor fan current has the problems indicated above, it is not intended to exclude this as a viable option in the present application.
In another embodiment, the determining whether to defrost the heating apparatus according to the outdoor fan current includes:
obtaining the current change rate of the outdoor fan according to the current of the outdoor fan;
and determining whether to carry out defrosting control on the heating equipment according to the outdoor fan current and/or the outdoor fan current change rate.
In the above embodiment, the current change rate of the outdoor fan is used as an optional confirmation object for determining whether to perform defrosting control on the heating device, so that prejudgment can be realized and defrosting can be performed in advance, and a problem that in some cases, although defrosting control is not performed according to the determination of the current of the outdoor fan, defrosting control needs to be started in practical application scenes, for example, in case of rapid defrosting, defrosting needs to be performed in advance to obtain a good defrosting effect.
In the above embodiment, three schemes for determining whether to perform defrosting control on the heating device may be formed by the outdoor fan current and/or the outdoor fan current change rate, specifically: determining whether to perform defrosting control on the heating equipment according to the outdoor fan current, determining whether to perform defrosting control on the heating equipment according to the outdoor fan current change rate, and determining whether to perform defrosting control on the heating equipment according to the outdoor fan current and the outdoor fan current change rate. The three determination schemes can realize comprehensive determination in multiple aspects, and defrosting control can be determined as long as any scheme is met, so that the most appropriate defrosting time can be comprehensively determined.
In one embodiment, the obtaining an outdoor fan current change rate according to the outdoor fan current includes:
and calculating the current change rate of the outdoor fan through a preset formula according to the current of the outdoor fan.
The current change rate of the outdoor fan can be customized by a preset formula. For example, in one embodiment, the preset formula is: Δ I ═ I (I)2-I1) (T/2), wherein T is preset time length, delta I is current change rate of the outdoor fan, and I1Is the average value of the outdoor fan current of the previous T/2 time length in the T time length, I2The average value of the outdoor fan current of the time length T/2 after the time length T.
For the above preset formula, in practical applications, T may be set according to specific requirements, for example, when T is set to 2 seconds, Δ I is a current change rate per second. For another example, when T is set to 60 seconds, Δ I is the average outdoor fan current for the last 30 seconds — the average outdoor fan current for the first 30 seconds)/30 seconds.
In one embodiment, the determining whether to perform defrosting control on the heating apparatus according to the outdoor fan current and/or the outdoor fan current change rate includes:
judging whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition, and determining to perform defrosting control on the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition; or,
judging whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, acquiring the temperature of an outdoor heat exchanger of the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, and judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition;
and if the current of the outdoor fan and/or the current change rate of the outdoor fan meet the first preset condition and the temperature of an outdoor heat exchanger of the heating equipment meets the second preset condition, determining to carry out defrosting control on the heating equipment.
The two schemes for determining whether to perform defrosting control on the heating equipment according to the outdoor fan current and/or the outdoor fan current change rate are provided.
For the first scheme, whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition or not is judged, and when the first preset condition is met, defrosting control on the heating equipment is determined.
According to the scheme, three selectable items are provided through the outdoor fan current and/or the outdoor fan current change rate, and defrosting control can be confirmed as long as one item meets a first preset condition.
With the first solution, in some cases, for example, the outdoor fan failure causes the fan to be jammed or the rotation resistance is increased, which may cause the outdoor fan current and/or the outdoor fan current change rate to satisfy the first preset condition, thereby triggering the defrosting control. Obviously, in this case, too, an unnecessary defrosting action is formed, resulting in unnecessary energy waste and a problem of lowering the heating effect.
For the second scheme, judging whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, acquiring the temperature of an outdoor heat exchanger of the heating equipment when the first preset condition is met, and judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition;
and if the current of the outdoor fan and/or the current change rate of the outdoor fan meet the first preset condition and the temperature of an outdoor heat exchanger of the heating equipment meets the second preset condition, determining to carry out defrosting control on the heating equipment.
In one embodiment, the second preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is less than or equal to a first preset threshold temperature.
After the first preset condition is judged, a second preset condition is further determined, and defrosting control is determined only when the first preset condition and the second preset condition are all met. According to the scheme, the first preset condition and the second preset condition form a double determination scheme for defrosting control, so that the situation that some fault problems cause that the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, and then unnecessary defrosting action is triggered can be prevented.
It should be noted that although the present application indicates the problem with the first solution, it does not represent an exclusion as a viable alternative.
In one embodiment, the first preset condition includes:
the current of the outdoor fan is greater than or equal to a preset threshold current;
the current change rate of the outdoor fan is greater than or equal to a preset threshold current change rate; or,
within a second preset time, the outdoor fan current is continuously smaller than the preset threshold current, and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate.
In practical application, when any sub-condition is met, defrosting control is triggered. And if the outdoor fan current is continuously smaller than the preset threshold current and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate within a second preset time, setting the sub-conditions to ensure the reliability of the unit. For example, in some cases, the unit does not make a valid determination of the outdoor fan current and the rate of change of the outdoor fan current, and thus, defrosting does not occur for a long time. Through a second preset time period, for example, in a specific application, the second preset time period may be set as 240 minutes of continuous heating operation of the heating device, if the heating device is operated for 240 minutes continuously, the outdoor fan current of the outdoor fan and the change rate of the outdoor fan current are both corresponding conditions for triggering, and in order to ensure the reliability of unit operation, the heating device performs defrosting control after being operated for 240 minutes continuously.
In one embodiment, the method further comprises:
the current of the outdoor fan is obtained, and meanwhile, the frequency of the outdoor fan is also obtained;
acquiring a preset threshold current and a preset threshold current change rate corresponding to the outdoor fan frequency according to a preset corresponding relationship, wherein the acquired preset threshold current and the acquired preset threshold current change rate are used for being compared with the outdoor fan current and the outdoor fan current change rate in a one-to-one correspondence manner, and the corresponding relationship comprises the following steps: at least one outdoor fan frequency, each outdoor fan frequency corresponding to a preset threshold current and a preset threshold current change rate.
For the above embodiment, in practical applications, the heating device may be a fixed-frequency heating device or a variable-frequency heating device. For a fixed-frequency heating apparatus, the preset threshold current and the preset threshold current change rate need only be one value. For the frequency conversion heating equipment, the working frequency is multiple, and the preset threshold current change rate corresponding to different frequencies are different. Therefore, according to the scheme of the embodiment, the preset threshold current and the preset threshold current change rate are obtained through the preset corresponding relation, when the method is applied to the variable-frequency heating equipment, defrosting control is further carried out in combination with working frequency, accurate defrosting control is further achieved, the occurrence of misjudgment is reduced, and unnecessary defrosting actions are further reduced.
And step S103, when the defrosting control is determined, carrying out defrosting control on the heating equipment.
In one embodiment, when it is determined to perform the defrosting control, performing the defrosting control on the heating apparatus includes:
when the defrosting control is determined, controlling the heating equipment to start defrosting;
in the defrosting process, acquiring the temperature of an outdoor heat exchanger of the heating equipment;
judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a third preset condition or not, and controlling the heating equipment to stop defrosting and controlling the heating equipment to heat again when the third preset condition is met.
With the above embodiment, when it is determined to perform the defrosting control, the defrosting control is performed according to the determination in step S102. After the heating equipment starts defrosting, the temperature of the outdoor heat exchanger can be obtained through detection of a temperature sensing bulb on the outdoor heat exchanger in the defrosting process, when the obtained temperature of the outdoor heat exchanger meets a third preset condition, the frost on the surface outdoor heat exchanger is removed, defrosting is triggered to stop through the third preset condition, and heating is carried out again.
In one embodiment, the third preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is greater than a second preset threshold temperature. In practical applications, the second preset threshold temperature should be greater than the first preset threshold temperature. For example, the first preset threshold temperature may be set to-5 ℃ and the second preset threshold temperature may be set to 15 ℃.
In summary, in the above-mentioned related embodiment, whether to perform defrosting control on the heating device is determined according to the outdoor fan current obtained when the heating device performs heating, which can help to reduce unnecessary defrosting actions, and can solve the problems of unnecessary energy waste and heating effect reduction caused by frequent defrosting under the condition of no frost or slight frosting, thereby improving the heating effect and improving the user experience comfort.
Fig. 2 is a schematic structural diagram of a defrosting control device according to an embodiment of the present application, and as shown in fig. 2, the defrosting control device 2 includes:
the acquiring module 21 is configured to acquire an outdoor fan current when the heating device performs heating;
the determining module 22 is configured to determine whether to perform defrosting control on the heating device according to the outdoor fan current;
and the control module 23 is configured to perform defrosting control on the heating apparatus when it is determined that the defrosting control is performed.
Further, the obtaining module 21 is specifically configured to:
judging whether the heating equipment enters a heating mode or not;
and if the heating mode is entered, acquiring the heating operation duration of the heating equipment, and acquiring the outdoor fan current of the heating equipment when the heating operation duration of the heating equipment reaches a first preset duration.
Further, the determining module 22 is specifically configured to:
obtaining the current change rate of the outdoor fan according to the current of the outdoor fan;
and determining whether to carry out defrosting control on the heating equipment according to the outdoor fan current and/or the outdoor fan current change rate.
Further, obtaining the outdoor fan current change rate according to the outdoor fan current includes:
and calculating the current change rate of the outdoor fan through a preset formula according to the current of the outdoor fan.
Further, the preset formula is as follows: Δ I ═ I (I)2-I1) (T/2), wherein T is preset time length, delta I is current change rate of the outdoor fan, and I1Is the average value of the outdoor fan current of the previous T/2 time length in the T time length, I2The average value of the outdoor fan current of the time length T/2 after the time length T.
Further, the determining whether to perform defrosting control on the heating device according to the outdoor fan current and/or the outdoor fan current change rate includes:
judging whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition, and determining to perform defrosting control on the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition; or,
judging whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, acquiring the temperature of an outdoor heat exchanger of the heating equipment when the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, and judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition;
and if the current of the outdoor fan and/or the current change rate of the outdoor fan meet the first preset condition and the temperature of an outdoor heat exchanger of the heating equipment meets the second preset condition, determining to carry out defrosting control on the heating equipment.
Further, the first preset condition includes:
the current of the outdoor fan is greater than or equal to a preset threshold current;
the current change rate of the outdoor fan is greater than or equal to a preset threshold current change rate; or,
within a second preset time, the outdoor fan current is continuously smaller than the preset threshold current, and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate.
Further, the current of the outdoor fan is obtained, and meanwhile, the frequency of the outdoor fan is also obtained;
acquiring a preset threshold current and a preset threshold current change rate corresponding to the outdoor fan frequency according to a preset corresponding relationship, wherein the acquired preset threshold current and the acquired preset threshold current change rate are used for being compared with the outdoor fan current and the outdoor fan current change rate in a one-to-one correspondence manner, and the corresponding relationship comprises the following steps: at least one outdoor fan frequency, each outdoor fan frequency corresponding to a preset threshold current and a preset threshold current change rate.
Further, the second preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is less than or equal to a first preset threshold temperature.
Further, the control module 23 is specifically configured to: when the defrosting control is determined, controlling the heating equipment to start defrosting;
in the defrosting process, acquiring the temperature of an outdoor heat exchanger of the heating equipment;
judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a third preset condition or not, and controlling the heating equipment to stop defrosting and controlling the heating equipment to heat again when the third preset condition is met.
Further, the third preset condition includes: the temperature of the outdoor heat exchanger of the heating equipment is greater than a second preset threshold temperature.
With regard to the apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
Fig. 3 is a schematic structural diagram of a heating apparatus according to an embodiment of the present application, and as shown in fig. 3, the heating apparatus 3 includes:
a controller 31, said controller 31 employing the method of any of the above.
Further, the heating device 3 is an air source heat pump.
With regard to the heating apparatus in the above-described embodiment, the specific manner in which each module performs the operation has been described in detail in the embodiment related to the method, and will not be elaborated here.
It is understood that the heating device is an air source heat pump, and is for illustrative purposes. It is not limited to this application, and in practical applications, the heating device may be an air conditioner, etc.
It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.
It should be noted that, in the description of the present application, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Further, in the description of the present application, the meaning of "a plurality" means at least two unless otherwise specified.
Any process or method descriptions in flow charts or otherwise described herein may be understood as: represents modules, segments or portions of code which include one or more executable instructions for implementing specific logical functions or steps of a process, and the scope of the preferred embodiments of the present application includes other implementations in which functions may be executed out of order from that shown or discussed, including substantially concurrently or in reverse order, depending on the functionality involved, as would be understood by those reasonably skilled in the art of the embodiments of the present application.
It should be understood that portions of the present application may be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, the various steps or methods may be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, any one or combination of the following techniques, which are known in the art, may be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application specific integrated circuit having an appropriate combinational logic gate circuit, a Programmable Gate Array (PGA), a Field Programmable Gate Array (FPGA), or the like.
It will be understood by those skilled in the art that all or part of the steps carried by the method for implementing the above embodiments may be implemented by hardware related to instructions of a program, which may be stored in a computer readable storage medium, and when the program is executed, the program includes one or a combination of the steps of the method embodiments.
In addition, functional units in the embodiments of the present application may be integrated into one processing module, or each unit may exist alone physically, or two or more units are integrated into one module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. The integrated module, if implemented in the form of a software functional module and sold or used as a stand-alone product, may also be stored in a computer readable storage medium.
The storage medium mentioned above may be a read-only memory, a magnetic or optical disk, etc.
In the description herein, reference to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.
Claims (18)
1. A defrosting control method is characterized by comprising the following steps:
acquiring outdoor fan current when heating equipment performs heating operation;
obtaining the current change rate of the outdoor fan according to the current of the outdoor fan;
judging whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition, and determining to perform defrosting control on the heating equipment according to whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, wherein the first preset condition comprises the following steps:
the current of the outdoor fan is greater than or equal to a preset threshold current;
the current change rate of the outdoor fan is greater than or equal to a preset threshold current change rate; or,
within a second preset time, the outdoor fan current is continuously smaller than the preset threshold current, and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate;
when the defrosting control is determined, carrying out defrosting control on the heating equipment;
the method further comprises the following steps:
the current of the outdoor fan is obtained, and meanwhile, the frequency of the outdoor fan is also obtained;
acquiring the preset threshold current and the preset threshold current change rate corresponding to the outdoor fan frequency according to a preset corresponding relationship, wherein the acquired preset threshold current and the acquired preset threshold current change rate are used for being compared with the outdoor fan current and the outdoor fan current change rate in a one-to-one correspondence manner, and the corresponding relationship comprises: at least one of the outdoor fan frequencies, each of the outdoor fan frequencies corresponding to one of the preset threshold current and the preset threshold current change rate.
2. The method of claim 1, wherein obtaining the outdoor fan current when the heating device is operating for heating comprises:
judging whether the heating equipment enters a heating mode or not;
and if the heating mode is entered, acquiring the heating operation duration of the heating equipment, and acquiring the outdoor fan current of the heating equipment when the heating operation duration of the heating equipment reaches a first preset duration.
3. The method of claim 1, wherein deriving an outdoor fan current rate of change from the outdoor fan current comprises:
and calculating the current change rate of the outdoor fan through a preset formula according to the current of the outdoor fan.
4. The method of claim 3,
the preset formula is as follows: Δ I ═ I (I)2-I1) (T/2), wherein T is preset time length, delta I is current change rate of the outdoor fan, and I1Is the average value of the outdoor fan current of the previous T/2 time length in the T time length, I2The average value of the outdoor fan current of the time length T/2 after the time length T.
5. The method according to claim 1, wherein the determining of defrosting control of the heating apparatus according to whether the first preset condition is satisfied includes:
if the first preset condition is met, determining to carry out defrosting control on the heating equipment; or,
if the first preset condition is met, acquiring the temperature of the outdoor heat exchanger of the heating equipment, judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition, and determining to carry out defrosting control on the heating equipment when the second preset condition is met.
6. The method according to claim 5, wherein the second preset condition comprises: the temperature of the outdoor heat exchanger of the heating equipment is less than or equal to a first preset threshold temperature.
7. The method according to claim 1, wherein the performing defrosting control on the heating apparatus when it is determined that defrosting control is performed includes:
when the defrosting control is determined, controlling the heating equipment to start defrosting;
in the defrosting process, acquiring the temperature of an outdoor heat exchanger of the heating equipment;
judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a third preset condition or not, and controlling the heating equipment to stop defrosting and controlling the heating equipment to heat again when the third preset condition is met.
8. The method according to claim 7, wherein the third preset condition comprises: the temperature of the outdoor heat exchanger of the heating equipment is greater than a second preset threshold temperature.
9. A defrosting control apparatus characterized by comprising:
the acquisition module is used for acquiring outdoor fan current when the heating equipment is in heating operation;
the determining module is used for obtaining the current change rate of the outdoor fan according to the current of the outdoor fan; judging whether the outdoor fan current and/or the outdoor fan current change rate meet a first preset condition, and determining to perform defrosting control on the heating equipment according to whether the outdoor fan current and/or the outdoor fan current change rate meet the first preset condition, wherein the first preset condition comprises the following steps:
the current of the outdoor fan is greater than or equal to a preset threshold current;
the current change rate of the outdoor fan is greater than or equal to a preset threshold current change rate; or,
within a second preset time, the outdoor fan current is continuously smaller than the preset threshold current, and the outdoor fan current change rate is continuously smaller than the preset threshold current change rate;
the control module is used for carrying out defrosting control on the heating equipment when the defrosting control is determined;
wherein the obtaining module is further configured to: the current of the outdoor fan is obtained, and meanwhile, the frequency of the outdoor fan is also obtained;
acquiring a preset threshold current and a preset threshold current change rate corresponding to the outdoor fan frequency according to a preset corresponding relationship, wherein the acquired preset threshold current and the acquired preset threshold current change rate are used for being compared with the outdoor fan current and the outdoor fan current change rate in a one-to-one correspondence manner, and the corresponding relationship comprises the following steps: at least one outdoor fan frequency, each outdoor fan frequency corresponding to a preset threshold current and a preset threshold current change rate.
10. The apparatus of claim 9, wherein the obtaining module is specifically configured to:
judging whether the heating equipment enters a heating mode or not;
and if the heating mode is entered, acquiring the heating operation duration of the heating equipment, and acquiring the outdoor fan current of the heating equipment when the heating operation duration of the heating equipment reaches a first preset duration.
11. The apparatus of claim 9, wherein said deriving an outdoor fan current rate of change from the outdoor fan current comprises:
and calculating the current change rate of the outdoor fan through a preset formula according to the current of the outdoor fan.
12. The apparatus of claim 11,
the preset formula is as follows: Δ I ═ I (I)2-I1) (T/2), wherein T is preset time length, delta I is current change rate of the outdoor fan, and I1Is the average value of the outdoor fan current of the previous T/2 time length in the T time length, I2The average value of the outdoor fan current of the time length T/2 after the time length T.
13. The apparatus of claim 9, wherein the determining of defrosting control of the heating device according to whether the first preset condition is satisfied comprises:
if the first preset condition is met, determining to carry out defrosting control on the heating equipment; or,
if the first preset condition is met, acquiring the temperature of the outdoor heat exchanger of the heating equipment, and judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a second preset condition or not; and when the second preset condition is met, determining to carry out defrosting control on the heating equipment.
14. The apparatus of claim 13, wherein the second preset condition comprises: the temperature of the outdoor heat exchanger of the heating equipment is less than or equal to a first preset threshold temperature.
15. The apparatus of claim 9, wherein the control module is specifically configured to: when the defrosting control is determined, controlling the heating equipment to start defrosting;
in the defrosting process, acquiring the temperature of an outdoor heat exchanger of the heating equipment;
judging whether the temperature of the outdoor heat exchanger of the heating equipment meets a third preset condition or not, and controlling the heating equipment to stop defrosting and controlling the heating equipment to heat again when the third preset condition is met.
16. The apparatus of claim 15, wherein the third preset condition comprises: the temperature of the outdoor heat exchanger of the heating equipment is greater than a second preset threshold temperature.
17. A heating apparatus, comprising: a controller employing the method of any one of claims 1-8.
18. Heating installation according to claim 17, characterized in that the heating installation is an air source heat pump.
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| CN110567125B (en) * | 2019-09-23 | 2021-09-17 | 宁波奥克斯电气股份有限公司 | Fan self-adaptive control method and device during frosting, air conditioner and storage medium |
| CN110567098A (en) * | 2019-09-23 | 2019-12-13 | 宁波奥克斯电气股份有限公司 | Defrosting control method and device, air conditioner and storage medium |
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