CN111473427A - Air return mesh enclosure for delaying heating and frosting, control method, air conditioner and storage medium - Google Patents

Air return mesh enclosure for delaying heating and frosting, control method, air conditioner and storage medium Download PDF

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Publication number
CN111473427A
CN111473427A CN202010387089.7A CN202010387089A CN111473427A CN 111473427 A CN111473427 A CN 111473427A CN 202010387089 A CN202010387089 A CN 202010387089A CN 111473427 A CN111473427 A CN 111473427A
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CN
China
Prior art keywords
surface temperature
heating
relative humidity
temperature
preset
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Pending
Application number
CN202010387089.7A
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Chinese (zh)
Inventor
赵攀
侯丽峰
赵虹宇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Aux Air Conditioning Co Ltd
Ningbo Aux Electric Co Ltd
Original Assignee
Ningbo Aux Electric Co Ltd
Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd
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Application filed by Ningbo Aux Electric Co Ltd, Ningbo Aux Intelligent Commercial Air Conditioning Manufacturing Co Ltd filed Critical Ningbo Aux Electric Co Ltd
Priority to CN202010387089.7A priority Critical patent/CN111473427A/en
Publication of CN111473427A publication Critical patent/CN111473427A/en
Pending legal-status Critical Current

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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
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/46—Component arrangements in separate outdoor units
    • F24F1/48—Component arrangements in separate outdoor units characterised by air airflow, e.g. inlet or outlet airflow
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
    • F24F1/56—Casing or covers of separate outdoor units, e.g. fan guards
    • 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
    • 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
    • F24F11/56—Remote control
    • 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
    • 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
    • F24F11/70—Control systems characterised by their outputs; Constructional details thereof
    • F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
    • F24F11/873—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling refrigerant heaters
    • 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
    • F24F11/88—Electrical aspects, e.g. circuits
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/10—Temperature
    • F24F2110/12—Temperature of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/20—Humidity
    • F24F2110/22—Humidity of the outside air

Abstract

The invention provides an air return net cover for delaying heating and frosting, a control method, an air conditioner and a storage medium, which relate to the technical field of air conditioners and comprise the following components: acquiring the working state of the air conditioner; acquiring the ambient temperature, the relative humidity and the surface temperature according to the working state, wherein the relative humidity is the relative humidity of outdoor air of the return air net cover, and the surface temperature is the humidity of the inner side of the net cover of the return air net cover; and the heating and frosting are delayed according to the control of the environmental temperature, the relative humidity and the surface temperature. According to the invention, through judging the environmental temperature, the relative humidity and the surface temperature, the air return mesh enclosure is utilized to accurately control and delay heating and frosting, the heating effect and the system reliability of the whole air conditioning unit are improved, and the reduction of the heat exchange capacity of the outdoor unit caused by too thick frosting or incomplete defrosting is avoided.

Description

Air return mesh enclosure for delaying heating and frosting, control method, air conditioner and storage medium
Technical Field
The invention relates to the technical field of air conditioners, in particular to an air return net cover for delaying heating and frosting, a control method, an air conditioner and a storage medium.
Background
When the air conditioner is in heating operation, because the outdoor environment temperature is low, the evaporation temperature of a refrigerant in a heat exchanger of the outdoor unit is lower than 0 ℃, so that moisture in the air is condensed into frost on fins of the heat exchanger of the outdoor unit, and the thickness of a frost layer is thicker and thicker along with the lengthening of time, so that the heating heat exchange effect of the air conditioner is poorer and poorer. Therefore, in the heating operation of the air conditioner, defrosting is the key for ensuring the heating effect.
In the existing air conditioner, an air return net cover is usually arranged outside a heat exchanger of the outdoor unit, so that the heat exchanger fins of the outdoor unit are prevented from being full of dust, the occurrence of fin inversion in transportation is avoided, and the requirement of attractiveness is met. However, the installation of the return air screen causes the problem of frosting of the fins of the outdoor unit heat exchanger, because in the case of heating, especially in the extremely harsh environment of low temperature and high humidity, the frosting speed of the outdoor unit heat exchanger is faster, the frosting thickness is thicker, and a part of the frosting adheres to the return air screen, which causes serious frost accumulation.
In the prior defrosting technology, a plurality of control methods are usually adopted to defrost the fins of the heat exchanger, and the influence of the return air net cover on frosting is usually ignored. Because the heat conduction of heat exchanger to the return air screen panel is limited, lead to after the defrosting, can have some remaining comdenstion water or frost layer to adhere to on the return air screen panel, can not melt completely and flow to outer quick-witted chassis and discharge to remaining comdenstion water or frost layer can form frost once more and constantly accumulate on the heat exchanger when leading to heating, seriously influence the heat transfer of outer machine of air conditioner, long-time overload operation can lead to unit protective fault even. In summary, the defrosting technology in the prior art only considers defrosting the heat exchanger fins, and fails to achieve the purpose of overall and effective defrosting of the air conditioning unit.
Disclosure of Invention
The invention solves the problem of comprehensively and effectively defrosting the air conditioner unit.
In order to solve the above problems, the present invention provides a return air mesh enclosure for delaying heating and frosting, wherein the return air mesh enclosure comprises an electric heating wire and a mesh enclosure, and the electric heating wire is wound around and fixed on the surface of the mesh enclosure in a U shape along a plurality of meshes of the mesh enclosure.
Therefore, the return air mesh enclosure provided by the invention comprises the mesh enclosure and the heating wire, wherein the mesh enclosure is used for preventing the heat exchanger fins of the outdoor unit from being full of dust, and simultaneously avoiding the occurrence of fin inversion in transportation. The heating wire is wound in a U shape and fixed on the surface of the mesh enclosure, and the heating wire is started to heat, so that the residual condensed water or frost layer on the mesh enclosure is removed, and further the fins of the heat exchanger are prevented from being further frosted due to the residual condensed water or frost layer of the return air mesh enclosure. The electric heating wire is in a U-shaped winding along the meshes of the mesh enclosure to ensure that the mesh enclosure is effectively heated, and the aim of effectively defrosting is further fulfilled. In conclusion, on the basis of ensuring the original functions, the air return mesh enclosure provided by the invention avoids the problem of defrosting caused by the air return mesh enclosure through the electric heating wire fixed on the surface of the air return mesh enclosure, comprehensively considers the whole air conditioning unit, improves the heating effect and the system reliability of the whole unit, effectively avoids the problem of heat exchange capacity reduction caused by too thick frost formation or incomplete frost formation, and ensures the effectiveness of the air conditioner in the continuous operation process.
Further, the U-shaped winding includes a positive winding, a negative winding, and a turning winding, the positive winding and the negative winding are alternately performed, and the turning winding is used to make the positive winding and the negative winding mutually converted, wherein in the positive winding, the heating wire is straight along the mesh from one side to the other side of the mesh enclosure, in the negative winding, the heating wire is straight along the mesh from the other side to the one side of the mesh enclosure, and in the turning winding, the heating wire is bent in an arc to convert the direction.
From this, the heating wire along positive and negative winding in turn of a plurality of nets of screen panel guarantees that the screen panel is effectively heated, further reaches the purpose of effective defrosting, adopts to turn to the winding simultaneously, makes the heating wire be the crooked converting direction of radian, effectively, guarantees safely to turn to.
Furthermore, a wiring port of the heating wire is electrically connected with an outdoor unit controller and is used for keeping communication with the outdoor unit controller.
Therefore, the connection port of the heating wire is electrically connected with the outdoor unit controller, so that the communication between the heating wire and the outdoor unit controller is ensured, the heating wire can be timely opened and closed under the control of the outdoor unit controller, and the timeliness and effectiveness of defrosting are ensured.
Further, the return air screen cover further comprises at least one of an ambient temperature sensor, a relative humidity sensor and a surface temperature sensor, wherein the ambient temperature sensor is used for detecting ambient temperature, the relative humidity sensor is used for detecting relative humidity, and the surface temperature sensor is used for detecting the surface temperature of the screen cover.
From this, through setting up ambient temperature sensor, the ambient temperature that effective monitoring return air screen panel was located utilizes the ambient temperature of monitoring to carry out effective defrosting. Through setting up the relative humidity sensor, the relative humidity of the outdoor air that the effective monitoring return air screen panel located utilizes the relative humidity of monitoring to carry out effective defrosting. Through setting up surface temperature sensor, the inboard surface temperature of screen panel of effective monitoring return air screen panel utilizes the surface temperature of monitoring to carry out effective defrosting.
Further, a plurality of the surface temperature sensors are fixed to an inner side of the mesh cover.
Therefore, the surface temperature sensor is fixed on the inner side of the mesh enclosure, so that the surface temperature of the inner side of the mesh enclosure is effectively monitored, and the surface temperature of the inner side of the mesh enclosure is accurately measured, and further effective defrosting is facilitated.
Further, the return air mesh enclosure further comprises a hook-shaped component, and the hook-shaped component is used for being fixed with the outdoor unit.
Therefore, the hook-shaped component is used for fixing the return air net cover, and the return air net cover is guaranteed to participate in the operation of the whole air conditioning unit. The function of defrosting is realized.
The second objective of the present invention is to provide a control method for delaying heating and frost formation, wherein the return air mesh enclosure is used to accurately control and delay heating and frost formation by determining the environmental temperature, the relative humidity and the surface temperature, so as to improve the heating effect and the system reliability of the whole air conditioning unit, and avoid the reduction of the heat exchange capacity of the outdoor unit due to too thick frost formation or incomplete frost formation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a control method for delaying heating and frosting comprises the following steps:
acquiring the working state of the air conditioner;
acquiring the ambient temperature, the relative humidity and the surface temperature according to the working state, wherein the relative humidity is the relative humidity of outdoor air of a return air net cover, the surface temperature is the humidity of the inner side of the net cover of the return air net cover, and the return air net cover is the return air net cover for delaying heating and frosting as required by any one of the claims 1-7;
and controlling and delaying heating and frosting according to the environment temperature, the relative humidity and the surface temperature.
The control method for delaying heating and frosting provided by the invention is based on the air return net cover, and comprehensively judges the defrosting condition of the air return net cover according to the environmental temperature, the relative humidity and the surface temperature of the air return net cover, so that the heating and frosting can be effectively delayed. In conclusion, the invention combines various temperature and humidity parameters of the return air net cover, avoids the defrosting problem caused by the return air net cover, effectively carries out defrosting judgment, accurately controls and delays heating and frosting, and improves the heating effect and the system reliability of the whole air conditioning unit.
Further, the acquiring the ambient temperature, the relative humidity and the surface temperature according to the working state comprises: and when the working state is a heating mode and the starting operation reaches a preset time length, acquiring the environment temperature, the relative humidity and the surface temperature.
Therefore, effective judgment is carried out according to the working state, the control of delaying heating and frosting is carried out in time when needed, and unnecessary defrosting operation is effectively avoided.
Further, the controlling the retarding of heating frost according to the ambient temperature, the relative humidity, and the surface temperature includes: and controlling the opening and closing of the electric heating wire according to the environment temperature, the relative humidity and the surface temperature.
Therefore, the opening and closing of the heating wires fully distributed on the surface of the air return net cover are controlled, and the defrosting problem caused by the addition of the air return net cover of the heat exchanger is effectively avoided.
Further, the controlling of the opening and closing of the heating wire according to the ambient temperature, the relative humidity, and the surface temperature includes:
and controlling the on-off of the electric heating wire according to whether the environmental temperature, the relative humidity and the surface temperature meet preset defrosting conditions.
From this, set up effectual defrosting condition of predetermineeing, combine ambient temperature, relative humidity and surface temperature to carry out accurate judgement to this high-efficient opening and closing of the heating wire that control return air screen panel surface is covered with guarantees the accuracy of defrosting operation.
Further, the preset defrosting condition includes a preset temperature and humidity condition, and the controlling of the on/off of the heating wire includes:
judging whether the preset temperature and humidity condition is met or not according to the environment temperature and the relative humidity;
and if so, controlling the opening and closing of the electric heating wire according to the surface temperature.
From this, set up effectual preset temperature humidity condition, combine ambient temperature, relative humidity earlier and carry out accurate judgement, if satisfy corresponding condition, combine surface temperature to judge again to this substep is judged many times, and the opening and closing of the heating wire that the high-efficient control return air screen panel surface was covered with guarantees the accuracy of defrosting operation.
Further, the preset defrosting condition includes a preset temperature and humidity condition, and the controlling of the on/off of the heating wire includes:
judging whether the preset temperature and humidity condition is met or not according to the environment temperature and the relative humidity;
if not, controlling the heating wire to be closed.
From this, set up effectual preset temperature humidity condition, combine ambient temperature, relative humidity earlier to carry out accurate judgement, the opening and closing of the heating wire that the high-efficient control return air screen panel surface was covered with guarantees the accuracy of defrosting operation.
Further, the preset temperature and humidity conditions include: the environment temperature is less than a preset environment temperature and the relative humidity is greater than a preset relative humidity.
Therefore, the effective preset temperature and humidity condition is set, the low-temperature damp state is determined, and the defrosting operation is guaranteed to be carried out in time in the low-temperature damp state.
Further, the preset defrosting condition includes a preset surface temperature condition, and the controlling of the opening and closing of the heating wire according to the surface temperature includes:
judging whether the preset surface temperature condition is met or not according to the surface temperature;
and if so, controlling the heating wire to be opened.
Therefore, under the condition that the environmental temperature and the relative humidity meet the preset temperature and humidity conditions, the effective preset surface temperature conditions are set, effective judgment is carried out according to the surface temperature, and the accuracy of defrosting operation is guaranteed.
Further, the preset defrosting condition includes a preset surface temperature condition, and the controlling of the opening and closing of the heating wire according to the surface temperature includes:
judging whether the preset surface temperature condition is met or not according to the surface temperature;
if not, controlling the heating wire to be closed.
Therefore, under the condition that the environmental temperature and the relative humidity meet the preset temperature and humidity conditions, the effective preset surface temperature conditions are set, effective judgment is carried out according to the surface temperature, and the accuracy of defrosting operation is guaranteed.
Further, the preset surface temperature conditions include: the difference between the average surface temperature and the ambient temperature is less than a preset temperature difference, wherein the average surface temperature is an average value of the surface temperatures of the mesh enclosure detected by the plurality of surface temperature sensors, and the surface temperature sensors are used for detecting the surface temperature of the mesh enclosure.
Therefore, the effective preset surface temperature condition is set, the condition that the surface temperature of the inner side of the mesh enclosure is too low is determined, and the defrosting operation is timely carried out under the condition that the surface temperature of the inner side of the mesh enclosure is too low.
Further, the acquiring the ambient temperature, the relative humidity and the surface temperature includes: and acquiring the ambient temperature, the relative humidity and the surface temperature again every preset time.
Therefore, the defrosting operation is detected again at preset intervals, a new round of control is performed to delay heating frosting, and timeliness, effectiveness and continuity of the defrosting operation are guaranteed.
The third objective of the present invention is to provide a control device for delaying heating and frost formation, which accurately controls and delays heating and frost formation by using a return air mesh enclosure through determining an ambient temperature, a relative humidity and a surface temperature, so as to improve the heating effect and system reliability of the whole air conditioning unit, and avoid the reduction of heat exchange capacity of an outdoor unit due to too thick frost formation or incomplete frost formation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a control device for retarding heating and frost formation, comprising:
the acquisition unit is used for acquiring the working state of the air conditioner; the air return net cover is used for delaying heating and frosting, and is characterized by also being used for acquiring the ambient temperature, the relative humidity and the surface temperature according to the working state, wherein the relative humidity is the relative humidity of outdoor air of the air return net cover, the surface temperature is the humidity of the inner side of the net cover of the air return net cover, and the air return net cover is the air return net cover for delaying heating and frosting;
and the control unit is used for controlling and delaying heating and frosting according to the environment temperature, the relative humidity and the surface temperature.
Compared with the prior art, the control device for delaying heating frosting and the control method for delaying heating frosting have the same beneficial effects, and are not repeated herein.
A fourth objective of the present invention is to provide an air conditioner, which utilizes the return air mesh enclosure to accurately control and delay heating and frost formation by determining the ambient temperature, the relative humidity and the surface temperature, so as to improve the heating effect and the system reliability of the whole air conditioning unit, and avoid the reduction of the heat exchange capacity of the outdoor unit due to too thick frost formation or incomplete frost formation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
an air conditioner comprises a computer readable storage medium and a processor, wherein a computer program is stored in the computer readable storage medium, and when the computer program is read and executed by the processor, the control method for delaying heating and frosting is realized.
Compared with the prior art, the air conditioner and the control method for delaying heating and frosting have the same beneficial effects, and are not repeated herein.
A fifth objective of the present invention is to provide a computer-readable storage medium, which utilizes a return air mesh enclosure to accurately control and delay heating and frost formation by determining an ambient temperature, a relative humidity and a surface temperature, so as to improve the heating effect and system reliability of the whole air conditioning unit, and avoid a reduction in heat exchange capacity of an outdoor unit due to too thick frost formation or incomplete frost formation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a computer-readable storage medium, which stores a computer program that, when read and executed by a processor, implements the above-described control method for delaying heating and frost formation.
The beneficial effects of the computer readable storage medium and the control method for delaying heating frosting are the same as those of the prior art, and are not described herein again.
Drawings
Fig. 1 is a schematic structural view of an air return net cover for delaying heating and frosting according to an embodiment of the present invention;
FIG. 2 is a schematic flow chart illustrating a method for delaying heating and frost formation according to an embodiment of the present invention;
FIG. 3 is a schematic diagram illustrating a process for controlling the opening and closing of a heating wire according to an embodiment of the present invention;
FIG. 4 is a schematic view illustrating a process of controlling the heating wire to be turned on and off according to the surface temperature according to an embodiment of the present invention;
FIG. 5 is a schematic structural diagram of a control device for retarding heating and frost formation according to an embodiment of the present invention;
description of reference numerals:
1-mesh enclosure, 2-heating wire, 21-wiring port, 3-ambient temperature sensor, 4-relative humidity sensor, 501-first surface temperature sensor, 502-second surface temperature sensor, 503-third surface temperature sensor, 504-fourth surface temperature sensor, 6-hook type component.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the existing air conditioner, an air return net cover is usually arranged outside a heat exchanger of the outdoor unit, so that the heat exchanger fins of the outdoor unit are prevented from being full of dust, the occurrence of fin inversion in transportation is avoided, and the requirement of attractiveness is met. However, in heating operation, the installation of the return air net cover can cause the problem of heat exchanger frosting, and under the heating condition, especially under extremely severe low-temperature and high-humidity environment, the frosting speed of the outdoor unit heat exchanger can be faster, and the frosting thickness can be thicker, so that a part of frosting is attached to the return air net cover, and the frost accumulation is caused. In the prior defrosting technology, a plurality of control methods are generally adopted to defrost the fins of the heat exchanger, and the problem of frosting caused by the return air net cover is ignored. In the prior art of defrosting, because the heat exchanger is limited in heat conduction to the return air screen cover, after defrosting is finished, a little residual condensed water or frost layer still exists on the return air screen cover and is attached to the return air screen cover, and the condensed water or the frost layer which remains can form frost on the heat exchanger again and continuously accumulate when heating is caused, so that heat exchange of an air conditioner outdoor unit is seriously influenced, long-time overload operation is realized, and even unit protective faults can be caused. In summary, the defrosting technology in the prior art only considers defrosting the heat exchanger fins, and fails to achieve the purpose of overall and effective defrosting of the air conditioning unit.
Referring to fig. 1, fig. 1 is a schematic structural view of a return air mesh enclosure for delaying heating and frost formation according to an embodiment of the present invention, where the return air mesh enclosure includes a mesh enclosure 1 and an electric heating wire 2, and the electric heating wire 2 is wound around and fixed on the surface of the mesh enclosure 1 along a plurality of meshes of the mesh enclosure 1 in a U-shape. Therefore, the return air mesh enclosure provided by the invention comprises the mesh enclosure 1 and the heating wire 2, wherein the mesh enclosure 1 is used for preventing the heat exchanger fins of the outdoor unit from being full of dust, and simultaneously, the occurrence of fin inversion in transportation is avoided. The heating wire 2 is wound back and fixed on the surface of the mesh enclosure 1 in a U shape, and the heating wire 2 is opened to heat, so that the residual condensed water or frost layer on the mesh enclosure 1 is removed, and further the heat exchanger fins are prevented from further frosting due to the residual condensed water or frost layer of the return air mesh enclosure. Wherein, the heating wire 2 is a U-shaped winding along a plurality of meshes of the screen panel 1 to ensure that the screen panel 1 is effectively heated, thereby further achieving the purpose of effective defrosting. In conclusion, on the basis of ensuring the original functions, the air return mesh enclosure provided by the invention avoids the problem of defrosting caused by the air return mesh enclosure through the electric heating wire 2 fixed on the surface of the air return mesh enclosure, comprehensively considers the whole air conditioning unit, improves the heating effect and the system reliability of the whole unit, effectively avoids the problem of heat exchange capacity reduction caused by too thick frost formation or incomplete frost formation, and ensures the effectiveness of the air conditioner in the continuous operation process.
Optionally, the U-shaped winding includes a positive winding, a negative winding, and a turning winding, the positive winding and the negative winding are alternately performed, and the turning winding is used to convert the positive winding and the negative winding, wherein in the positive winding, the heating wire is straight along the mesh from one side of the mesh enclosure to the other side, in the negative winding, the heating wire is straight along the mesh from the other side of the mesh enclosure to the one side, and in the turning winding, the heating wire is bent in a radian to change direction. From this, the heating wire is along the positive and negative winding in turn of a plurality of nets of screen panel, guarantees that the screen panel is effectively heated, further reaches the purpose of effective defrosting, adopts to turn to the winding simultaneously, makes the heating wire be the crooked converting direction of radian, effectively, guarantees safely to turn to.
Alternatively, the connection port 21 of the heating wire 2 is electrically connected to the outdoor unit controller for communication with the outdoor unit controller. Therefore, the connection port 21 of the heating wire 2 is electrically connected with the outdoor unit controller, so that the communication between the heating wire 2 and the outdoor unit controller is ensured, the heating wire 2 can be timely opened and closed under the control of the outdoor unit controller, and the timeliness and effectiveness of defrosting are ensured.
Optionally, the return air mesh enclosure further comprises an ambient temperature sensor 3, and the ambient temperature sensor 3 is used for detecting the ambient temperature. From this, through setting up ambient temperature sensor 3, the ambient temperature that the effective monitoring return air screen panel located utilizes the ambient temperature of monitoring to carry out effective defrosting.
Preferably, the ambient temperature sensor 3 is fixed on the bracket of the return air net cover and is completely exposed to the outdoor air, so that the ambient temperature can be efficiently monitored.
Optionally, the return air net cover further comprises a relative humidity sensor 4, and the relative humidity sensor 4 is used for detecting relative humidity. From this, through setting up relative humidity sensor 4, the relative humidity of the outdoor air that the effective monitoring return air screen panel located utilizes the relative humidity of monitoring to effectively defrost.
Preferably, the relative humidity sensor 4 is fixed to the bracket of the return air net cover and is completely exposed to the outdoor air, so that the relative humidity can be effectively monitored.
Optionally, the return air screen further comprises a plurality of surface temperature sensors for detecting the surface temperature of the screen 1. From this, through setting up surface temperature sensor, the surface temperature of the screen panel 1 inboard of effective monitoring return air screen panel utilizes the surface temperature of monitoring to carry out effective defrosting.
Alternatively, a plurality of surface temperature sensors are fixed inside the mesh cover 1. Therefore, the surface temperature sensor is fixed on the inner side of the mesh enclosure 1, so that the surface temperature of the inner side of the mesh enclosure 1 is effectively monitored, and the surface temperature of the inner side of the mesh enclosure 1 is accurately measured, and further effective defrosting is facilitated.
Preferably, the plurality of surface temperature sensors are evenly distributed on the inner side of the mesh cover 1, reducing monitoring errors.
Preferably, as seen in fig. 1, the plurality of surface temperature sensors includes a first surface temperature sensor 501, a second surface temperature sensor 502, a third surface temperature sensor 503 and a fourth surface temperature sensor 504, wherein the first surface temperature sensor 501, the second surface temperature sensor 502, the third surface temperature sensor 503 and the fourth surface temperature sensor 504 are uniformly distributed on the mesh of the mesh enclosure 1, thereby performing effective surface temperature measurement.
Optionally, the return air net cover further comprises a hook member 6, and the hook member 6 is used for fixing with the outdoor unit. From this, set up hook type part 6 and be used for fixed return air screen panel, guarantee that the return air screen panel participates in the operation of whole air conditioning unit, realize the function of defrosting.
Preferably, the hook-shaped member 6 is screwed with a hole on a metal plate of the outdoor unit, so as to fix the return air net cover. Since the return air screen is typically located on the back of the outdoor unit and in contact with the condenser fins, the return air screen is effectively secured by the hook member 6.
The air return mesh enclosure for delaying heating and frosting provided by the invention avoids the problem of defrosting caused by the air return mesh enclosure through the electric heating wire 2 fixed on the surface of the air return mesh enclosure on the basis of ensuring the original function, ensures that the electric heating wire 2 is wound in a U shape to ensure that the mesh enclosure 1 is effectively heated, and further achieves the purpose of effectively defrosting, thereby comprehensively and effectively defrosting the air conditioner unit.
In another embodiment of the present invention, based on the above-mentioned air return mesh enclosure for delaying heating frosting, referring to fig. 2, fig. 2 is a schematic flow chart of the method for delaying heating frosting according to the embodiment of the present invention, which includes steps S1 to S3, wherein:
in step S1, the operating state of the air conditioner is acquired. Therefore, accurate judgment is carried out according to the working state.
In step S2, according to the operating state, the ambient temperature, the relative humidity and the surface temperature are obtained, where the relative humidity is the relative humidity of the outdoor air of the return air net cover, the surface temperature is the surface temperature of the inside of the net cover 1 of the return air net cover, and the return air net cover is the return air net cover for delaying heating and frosting as described above. Therefore, effective environmental temperature, relative humidity and surface temperature are obtained, and heating and frosting are effectively delayed.
In step S3, heating frosting is delayed according to the ambient temperature, the relative humidity and the surface temperature control. Therefore, the control method for delaying heating and frosting provided by the invention is based on the return air net cover, and comprehensively judges the defrosting condition of the return air net cover according to the environmental temperature, the relative humidity and the surface temperature of the return air net cover, so that the heating and frosting can be effectively delayed. In conclusion, the invention combines various temperature and humidity parameters of the return air net cover, avoids the defrosting problem caused by the return air net cover, effectively carries out defrosting judgment, accurately controls and delays heating and frosting, and improves the heating effect and the system reliability of the whole air conditioning unit.
Optionally, the obtaining the ambient temperature, the relative humidity, and the surface temperature according to the operating state includes: and when the working state is a heating mode and the starting operation reaches a preset duration, acquiring the ambient temperature, the relative humidity and the surface temperature. Therefore, effective judgment is carried out according to the working state, the control of delaying heating and frosting is carried out in time when needed, and unnecessary defrosting operation is effectively avoided.
Preferably, the value of the preset time is 5 minutes, and the effective preset time is set, so that the effectiveness of the defrosting operation is ensured, and unnecessary defrosting operation is avoided.
Optionally, the delaying of heating and frosting according to the control of the ambient temperature, the relative humidity and the surface temperature comprises: the opening and closing of the heating wire 2 is controlled according to the ambient temperature, the relative humidity, and the surface temperature. Therefore, the opening and closing of the electric heating wires 2 fully distributed on the surface of the air return net cover are controlled, and the defrosting problem caused by the addition of the air return net cover of the heat exchanger is effectively avoided.
Alternatively, the above controlling the opening and closing of the heating wire 2 according to the ambient temperature, the relative humidity, and the surface temperature includes: the opening and closing of the heating wire 2 is controlled according to whether the environmental temperature, the relative humidity and the surface temperature meet the preset defrosting condition. From this, set up effectual defrosting condition of predetermineeing, combine ambient temperature, relative humidity and surface temperature to carry out accurate judgement to this high-efficient opening and closing of the heating wire 2 that control return air screen panel surface is covered with guarantees the accuracy of defrosting operation.
In the embodiment of the present invention, the preset defrosting condition includes a preset temperature and humidity condition, and referring to fig. 3, fig. 3 is a schematic flow chart illustrating the operation of controlling the heating wire 2 to open and close according to the embodiment of the present invention, and step S3 includes steps S31 to S33, where:
in step S31, it is determined whether a preset temperature-humidity condition is satisfied based on the ambient temperature and the relative humidity. Therefore, the effective preset temperature and humidity condition is set, and the accuracy of defrosting operation is ensured.
If the temperature is satisfied in step S32, the opening and closing of the heating wire 2 is controlled according to the surface temperature. From this, set up effectual preset temperature humidity condition, combine ambient temperature, relative humidity earlier and carry out accurate judgement, if satisfy corresponding condition, combine surface temperature to judge again to this substep is judged many times, and the opening and closing of the heating wire 2 that the high-efficient control return air screen panel surface was covered with guarantees the accuracy of defrosting operation.
In step S33, if not, the heating wire 2 is controlled to be turned off. From this, set up effectual preset temperature humidity condition, combine ambient temperature, relative humidity earlier to carry out accurate judgement, the opening and closing of the heating wire 2 that the high-efficient control return air screen panel surface was covered with guarantees the accuracy of defrosting operation.
Optionally, the preset temperature and humidity conditions include: the ambient temperature is less than the preset ambient temperature and the relative humidity is greater than the preset relative humidity. Therefore, the effective preset temperature and humidity condition is set, the low-temperature damp state is determined, and the defrosting operation is guaranteed to be carried out in time in the low-temperature damp state.
Specifically, the value range of the preset environment temperature is-1 ℃ to 1 ℃, and preferably 0 ℃, so that the effective preset environment temperature is set to ensure the accuracy of the defrosting operation.
Specifically, the value of the preset relative humidity ranges from 75% to 85%, preferably 80%, thereby setting the effective preset relative humidity to ensure the accuracy of the defrosting operation.
In the embodiment of the present invention, the preset defrosting condition includes a preset surface temperature condition, and referring to fig. 4, fig. 4 is a schematic flow chart illustrating the operation of controlling the heating wire 2 to open and close according to the surface temperature according to the embodiment of the present invention, and step S32 includes steps S321 to S323, in which:
in step S321, it is determined whether a preset surface temperature condition is satisfied according to the surface temperature. Therefore, the effective preset surface temperature condition is set, and the accuracy of defrosting operation is ensured.
In step S322, if the result is satisfied, the heating wire 2 is controlled to be turned on. Therefore, under the condition that the environmental temperature and the relative humidity meet the preset temperature and humidity conditions, the effective preset surface temperature conditions are set, effective judgment is carried out according to the surface temperature, and the accuracy of defrosting operation is guaranteed.
In step S323, if not, the heating wire 2 is controlled to be turned off. Therefore, under the condition that the environmental temperature and the relative humidity meet the preset temperature and humidity conditions, the effective preset surface temperature conditions are set, effective judgment is carried out according to the surface temperature, and the accuracy of defrosting operation is guaranteed.
Optionally, the preset surface temperature conditions include: the difference between the average surface temperature and the ambient temperature is smaller than a preset temperature difference, wherein the average surface temperature is an average value of the surface temperatures of the mesh enclosure 1 detected by the plurality of surface temperature sensors, and the surface temperature sensors are used for detecting the surface temperature of the mesh enclosure 1. Therefore, the effective preset surface temperature condition is set, the condition that the surface temperature of the inner side of the mesh enclosure 1 is too low is determined, and the defrosting operation is timely carried out under the condition that the surface temperature of the inner side of the mesh enclosure 1 is too low.
Specifically, the value range of the preset temperature difference is 2 ℃ to 4 ℃, and preferably 3 ℃, so that the effective preset temperature difference is set to ensure the accuracy of the defrosting operation.
Optionally, step S2 specifically includes: and acquiring the ambient temperature, the relative humidity and the surface temperature again every preset time. Therefore, the defrosting operation is detected again at preset intervals, a new round of control is performed to delay heating frosting, and timeliness, effectiveness and continuity of the defrosting operation are guaranteed.
Preferably, the preset duration is 10S. Therefore, reasonable preset time is set, and the defrosting operation is continuously re-detected and re-controlled, so that the timeliness, effectiveness and continuity of the defrosting operation are ensured.
In one embodiment of the invention, a return air screen, T, as shown in FIG. 1 is usedaoIndicating the ambient temperature, R, detected by the ambient temperature sensorHIndicating the relative humidity, T, detected by the relative humidity sensorc1Indicating a first surface temperature, T, detected by a first surface temperature sensorc2Indicating a second surface temperature, T, detected by a second surface temperature sensorc3Indicating a third surface temperature, T, detected by a third surface temperature sensorc4Indicating the fourth surface temperature detected by the fourth surface temperature sensor. Preset ambient temperature Tao' the value is 0 ℃, and the preset relative humidity RH' the value is 80%, and the preset temperature difference TDifference valueThe value of (A) is 3 ℃. Firstly, the ambient temperature T is detectedaoIs-2 ℃ and less than a predetermined ambient temperature Tao', and the relative humidity R detected at this timeH85% higher than the preset relative humidity RH' so that the preset temperature and humidity condition is satisfied, the opening and closing of the heating wire 2 is continuously controlled according to the surface temperature. Continuously detecting the first surface temperature Tc1A second surfaceTemperature Tc2Third surface temperature Tc3And a fourth surface temperature Tc4Average value of (A) Tcm. Mean value T at this timecmI.e. the average surface temperature, measured at-1 deg.C, determining the average value TcmAnd ambient temperature TaoIs 1 ℃ and is less than a preset temperature difference TDifference valueAnd the heating wire 2 is controlled to be opened when the preset surface temperature condition is met.
According to the control method for delaying heating frosting, provided by the invention, through judging the environmental temperature, the relative humidity and the surface temperature, the heating frosting is accurately delayed by utilizing the return air net cover, the heating effect and the system reliability of the whole air conditioning unit are improved, and the reduction of the heat exchange capacity of the outdoor unit caused by too thick frosting or incomplete defrosting is avoided.
Fig. 5 is a schematic structural diagram of a control apparatus 500 for delaying heating and frost formation according to an embodiment of the present invention, and includes an obtaining unit 5001 and a control unit 5002.
An acquiring unit 5001 for acquiring an operating state of the air conditioner; the air return net cover is used for obtaining the ambient temperature, the relative humidity and the surface temperature according to the working state, wherein the relative humidity is the relative humidity of outdoor air of the air return net cover, the surface temperature is the humidity of the inner side of the net cover 1 of the air return net cover, and the air return net cover is the air return net cover for delaying heating and frosting;
and a control unit 5002 for controlling the delay of heating and frosting according to the ambient temperature, the relative humidity and the surface temperature.
According to the control device for delaying heating frosting, provided by the invention, through judging the environmental temperature, the relative humidity and the surface temperature, the heating frosting is accurately delayed by utilizing the return air net cover, the heating effect and the system reliability of the whole air conditioning unit are improved, and the reduction of the heat exchange capacity of the outdoor unit caused by too thick frosting or incomplete defrosting is avoided.
In another embodiment of the present invention, an air conditioner includes a computer readable storage medium storing a computer program and a processor, wherein the computer program is read and executed by the processor to implement the above control method for delaying heating and frosting. Therefore, the air return net cover is used for accurately controlling and delaying heating and frosting, the heating effect and the system reliability of the whole air conditioning unit are improved, and the reduction of the heat exchange capacity of the outdoor unit caused by too thick frosting or incomplete defrosting is avoided.
Still another embodiment of the present invention further provides a computer-readable storage medium, which stores a computer program, and when the computer program is read and executed by a processor, the method for controlling heating and frosting delay as above is implemented. Therefore, the air return net cover is used for accurately controlling and delaying heating and frosting, the heating effect and the system reliability of the whole air conditioning unit are improved, and the reduction of the heat exchange capacity of the outdoor unit caused by too thick frosting or incomplete defrosting is avoided.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one skilled in the art without departing from the spirit and scope of the invention as defined in the appended claims.

Claims (20)

1. The utility model provides a delay return air screen panel that heats and frosts which characterized in that, return air screen panel includes screen panel (1) and heating wire (2), heating wire (2) along a plurality of meshes of screen panel (1) are the U type and fix in the surface of screen panel (1) is convoluteed.
2. A return air screen for delaying heating and frost formation according to claim 1, wherein said U-shaped return winding includes a positive winding, a negative winding and a turning winding, said positive winding and said negative winding are alternately performed, said turning winding is used for converting said positive winding and said negative winding to each other, wherein in said positive winding, said heating wire (2) is linearly arranged along said screen from one side of said screen (1) to the other side thereof, in said negative winding, said heating wire (2) is linearly arranged along said screen from said other side of said screen (1) to said one side thereof, and in said turning winding, said heating wire (2) is arcuately turned in a direction.
3. A return air mesh enclosure for delaying heating and frost formation as claimed in claim 1, wherein the connection port (21) of the heating wire (2) is used for electrical connection with an outdoor unit controller.
4. A return air screen for delaying heating and frost formation according to claim 1, further comprising at least one of an ambient temperature sensor (3), a relative humidity sensor (4) and a surface temperature sensor, wherein the ambient temperature sensor (3) is used for detecting ambient temperature, the relative humidity sensor (4) is used for detecting relative humidity, and the surface temperature sensor is used for detecting surface temperature of the screen (1).
5. A return air screen for delaying heating and frost formation as defined in claim 4, wherein said surface temperature sensor is fixed to the inside of said screen (1).
6. A return air cover for delaying heating and frost formation as defined in claim 1, further comprising a hook member (6), wherein said hook member (6) is used for fixing with an outdoor unit.
7. A control method for delaying heating and frosting is characterized by comprising the following steps:
acquiring the working state of the air conditioner;
acquiring an ambient temperature, a relative humidity and a surface temperature according to the working state, wherein the relative humidity is the relative humidity of outdoor air of a return air net cover, the surface temperature is the surface temperature of the inner side of the net cover of the return air net cover, and the return air net cover is the return air net cover for delaying heating and frosting as claimed in any one of claims 1-6;
and controlling and delaying heating and frosting according to the environment temperature, the relative humidity and the surface temperature.
8. The method for delaying heating and frost formation of claim 7, wherein the obtaining of the ambient temperature, the relative humidity and the surface temperature according to the operating state comprises:
and when the working state is a heating mode and the starting operation reaches a preset time length, acquiring the environment temperature, the relative humidity and the surface temperature.
9. The method of claim 7, wherein the controlling of the delayed heating frost according to the ambient temperature, the relative humidity, and the surface temperature comprises:
and controlling the on-off of the electric heating wire (2) according to the environment temperature, the relative humidity and the surface temperature.
10. The control method for delaying heating and frost formation of claim 9, wherein said controlling the opening and closing of said heating wire (2) according to said ambient temperature, said relative humidity and said surface temperature comprises:
and controlling the on-off of the electric heating wire (2) according to whether the environmental temperature, the relative humidity and the surface temperature meet the preset defrosting condition.
11. The control method for delaying heating and frost formation of claim 10, wherein the preset defrosting condition comprises a preset temperature and humidity condition, and the controlling of the on and off of the heating wire (2) comprises:
judging whether the preset temperature and humidity condition is met or not according to the environment temperature and the relative humidity;
if so, controlling the opening and closing of the electric heating wire (2) according to the surface temperature.
12. The control method for delaying heating and frost formation of claim 10, wherein the preset defrosting condition comprises a preset temperature and humidity condition, and the controlling of the on and off of the heating wire (2) comprises:
judging whether the preset temperature and humidity condition is met or not according to the environment temperature and the relative humidity;
if not, the electric heating wire (2) is controlled to be closed.
13. The method for delaying heating and frost formation of claim 11 or 12, wherein the preset temperature and humidity conditions include:
the environment temperature is less than a preset environment temperature and the relative humidity is greater than a preset relative humidity.
14. The control method for delaying heating frosting according to claim 11, wherein the preset defrosting condition includes a preset surface temperature condition, and the controlling the heating wires (2) to be turned on and off according to the surface temperature includes:
judging whether the preset surface temperature condition is met or not according to the surface temperature;
if so, controlling the heating wire (2) to be opened.
15. The control method for delaying heating frosting according to claim 11, wherein the preset defrosting condition includes a preset surface temperature condition, and the controlling the heating wires (2) to be turned on and off according to the surface temperature includes:
judging whether the preset surface temperature condition is met or not according to the surface temperature;
if not, the electric heating wire (2) is controlled to be closed.
16. The control method for delaying heating frost formation of claim 14 or 15, wherein the preset surface temperature condition comprises:
the difference between the average surface temperature and the ambient temperature is less than a preset temperature difference, wherein the average surface temperature is the average value of the inside surface temperature of the mesh enclosure (1) detected by a plurality of surface temperature sensors, and the surface temperature sensors are used for detecting the inside surface temperature of the mesh enclosure (1).
17. The method for delaying heating frost control of claim 7 wherein said obtaining ambient temperature, relative humidity and surface temperature comprises: and acquiring the ambient temperature, the relative humidity and the surface temperature again every preset time.
18. A control device for retarding heating and frost formation, comprising:
the acquisition unit is used for acquiring the working state of the air conditioner; the air return net cover is used for obtaining the ambient temperature, the relative humidity and the surface temperature according to the working state, wherein the relative humidity is the relative humidity of the outdoor air of the air return net cover, the surface temperature is the surface temperature of the inner side of the net cover of the air return net cover, and the air return net cover is the air return net cover for delaying heating and frosting as claimed in any one of claims 1-6;
and the control unit is used for controlling and delaying heating and frosting according to the environment temperature, the relative humidity and the surface temperature.
19. An air conditioner comprising a computer-readable storage medium storing a computer program and a processor, wherein the computer program is read by the processor and executed to implement the control method for delaying heating and frost formation according to any one of claims 7 to 17.
20. A computer-readable storage medium, characterized in that the computer-readable storage medium stores a computer program which, when read and executed by a processor, implements the control method for delaying heating frosting according to any one of claims 7 to 17.
CN202010387089.7A 2020-05-09 2020-05-09 Air return mesh enclosure for delaying heating and frosting, control method, air conditioner and storage medium Pending CN111473427A (en)

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