CN112050364B - Control method and control device for defrosting of air conditioner and air conditioner - Google Patents

Control method and control device for defrosting of air conditioner and air conditioner Download PDF

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Publication number
CN112050364B
CN112050364B CN201910492355.XA CN201910492355A CN112050364B CN 112050364 B CN112050364 B CN 112050364B CN 201910492355 A CN201910492355 A CN 201910492355A CN 112050364 B CN112050364 B CN 112050364B
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temperature
water
storage device
control valve
water storage
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CN112050364A (en
Inventor
许文明
代传民
王飞
齐兆乾
罗荣邦
于文文
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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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
    • 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
    • F24F11/62—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
    • 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
    • F24F11/89—Arrangement or mounting of control or safety devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S20/00—Solar heat collectors specially adapted for particular uses or environments
    • F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
    • F24S80/00—Details, accessories or component parts of solar heat collectors not provided for in groups F24S10/00-F24S70/00
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B10/00—Integration of renewable energy sources in buildings
    • Y02B10/20—Solar thermal

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Fuzzy Systems (AREA)
  • Mathematical Physics (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Thermal Sciences (AREA)
  • Air Conditioning Control Device (AREA)

Abstract

The application relates to a control method and a control device for defrosting of an air conditioner and the air conditioner. The control method comprises the following steps: when the air conditioner operates in a heating mode, adjusting the control valve to a first flow opening according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device; when a control valve of the air conditioner runs for a set time length according to the first flow opening and the water temperature of the water storage device does not meet the defrosting water temperature condition, the control valve is adjusted to the second flow opening based on temperature attenuation information, so that the water temperature in the water storage device meets the defrosting water temperature condition. The control method for defrosting the air conditioner provided by the embodiment of the disclosure enables spray water of the air conditioner in the process of executing the defrosting mode to always meet the water temperature requirement for realizing a better defrosting effect, thereby effectively reducing the problem that the defrosting effect is influenced due to uncontrollable water temperature caused by the influence of an outdoor environment in the related art.

Description

Control method and control device for defrosting of air conditioner and air conditioner
Technical Field
The present application relates to the field of air conditioner defrosting technologies, and for example, to a control method and a control device for air conditioner defrosting, and an air conditioner.
Background
Along with the improvement of living standard of people, air conditioning equipment has also walked into thousands of households, the use of domestic air conditioners and central air conditioners is more and more common, the requirement of users on the comfort level of the air conditioner is also more and more high, the problems existing in the use process of the air conditioner are also gradually exposed, and one of the problems is the problem that an outdoor unit of the air conditioner is frosted and frozen when the air conditioner operates in severe cold climate. When the air conditioner operates in a low-temperature area or an area with large wind and snow, the condensed water flow on the outer surface of the condenser of the outdoor unit can drop on the base plate, the condenser and the base plate of the air conditioner can be frozen under the condition that the air conditioner operates for a long time, the condensed ice layer on the outdoor unit can obstruct the heat exchange between the internal refrigerant and the outdoor environment, the refrigerating efficiency of the air conditioner is reduced, in order to ensure the heating effect of the air conditioner, the air conditioner has to operate with increased power, and the extra consumption of electric energy and the use cost of a user are increased.
Therefore, some conventional air conditioners have a defrosting function for defrosting an outdoor unit of the air conditioner by spraying a liquid such as an antifreeze solution or water, for example, by heating the outdoor unit with a heating device provided in the outdoor unit, defrosting an outdoor heat exchanger with a high-temperature refrigerant discharged from a compressor, or defrosting the outdoor unit with a high-temperature refrigerant.
In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in the related art:
for the air-conditioning products that adopt liquids such as spray water to defrost, often have the not good problem of defrosting effect when in actual application, the main reason is that the outdoor environment that influences the outdoor unit frost freezing not only can constitute the influence to the outdoor unit, can also influence the relevant device that stores and sprays above-mentioned liquid simultaneously, for example the defrosting water can freeze the phenomenon by the influence of temperature under the low temperature environmental condition, can not normally spray the operation when the air conditioner needs to defrost, therefore the air conditioner defrosting purpose that just can't realize.
Disclosure of Invention
The following presents a simplified summary in order to provide a basic understanding of some aspects of the disclosed embodiments. This summary is not an extensive overview and is intended to neither identify key/critical elements nor delineate the scope of such embodiments, but is intended to be a prelude to the more detailed description that is presented later.
The embodiment of the disclosure provides a control method and a control device for defrosting of an air conditioner and the air conditioner, and aims to solve the technical problem that an air conditioner product which is defrosted by liquid such as spray water is affected by outdoor environment in the practical application process to cause poor defrosting effect.
In some embodiments, the control method comprises:
when the air conditioner runs in a heating mode, the control valve is adjusted to a first flow opening degree according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device;
when a control valve of the air conditioner runs for a set time length by the first flow opening degree and the water temperature of the water storage device does not meet the defrosting water temperature condition, the control valve is adjusted to the second flow opening degree based on temperature attenuation information so that the water temperature in the water storage device meets the defrosting water temperature condition.
In some embodiments, the control device comprises:
a first opening adjusting module configured to adjust the control valve to a first flow opening according to an indoor ambient temperature, an indoor coil temperature and a water temperature in the water storage device when the air conditioner operates in a heating mode;
and the second opening degree adjusting module is configured to adjust the control valve to a second flow opening degree based on temperature attenuation information when the control valve of the air conditioner runs for a set time at the first flow opening degree and the water temperature of the water storage device does not meet the defrosting water temperature condition, so that the water temperature in the water storage device meets the defrosting water temperature condition.
In some embodiments, the air conditioner comprises an indoor unit, an outdoor unit and an outdoor defrosting device, wherein the outdoor defrosting device comprises an exhaust branch, a water storage device, a spraying device and a control valve; the two ends of the exhaust branch are respectively connected in parallel with an exhaust pipeline of a compressor of the outdoor unit and a liquid outlet pipeline of an indoor heat exchanger of the indoor unit in a heating mode, and the exhaust branch is connected with the water storage device and is set to heat water stored in the water storage device by utilizing the exhaust heat of the compressor; the spraying device is communicated with the water storage device and is arranged to controllably spray water in the water storage device to the outdoor heat exchanger of the outdoor unit; the control valve comprises a first control valve arranged in the exhaust pipeline and a second control valve arranged in the exhaust branch; the air conditioner also comprises the control device.
Some technical solutions provided by the embodiments of the present disclosure can achieve the following technical effects:
according to the control method for defrosting of the air conditioner, the heating device is controlled according to the indoor environment temperature, the indoor coil temperature and the water temperature of the water storage device, the water temperature in the water storage device can not meet the preset defrosting water temperature condition, and the control condition is further carried out according to the temperature attenuation information, so that the water temperature requirement for achieving a better defrosting effect can be always met by spray water of the air conditioner in the process of executing a defrosting mode, and the problem that the defrosting effect is influenced due to uncontrollable water temperature caused by the influence of the outdoor environment in the related technology is effectively solved.
The foregoing general description and the following description are exemplary and explanatory only and are not restrictive of the application.
Drawings
One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the accompanying drawings and not in limitation thereof, in which elements having the same reference numeral designations are shown as like elements and not in limitation thereof, and wherein:
fig. 1 is a schematic flowchart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure;
fig. 2 is a schematic flow chart of a control method for defrosting an air conditioner according to another embodiment of the present disclosure;
fig. 3 is a flowchart illustrating a control method for defrosting an air conditioner according to another embodiment of the present disclosure;
fig. 4 is a schematic structural diagram of a control device for defrosting an air conditioner according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of an electronic device provided in an embodiment of the present disclosure.
Detailed Description
So that the manner in which the features and elements of the disclosed embodiments can be understood in detail, a more particular description of the disclosed embodiments, briefly summarized above, may be had by reference to the embodiments, some of which are illustrated in the appended drawings. In the following description of the technology, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown in simplified form in order to simplify the drawing.
The embodiment of the disclosure provides an air conditioner, which comprises an indoor unit, an outdoor unit and an outdoor defrosting device.
The indoor unit comprises an indoor evaporator, an indoor fan and other components, wherein the indoor evaporator is set to exchange heat with the indoor environment so as to cool the indoor environment when the air conditioner operates in a cooling mode or heat the indoor environment when the air conditioner operates in a heating mode.
The outdoor unit includes an outdoor heat exchanger, a compressor, etc., and the outdoor heat exchanger is configured to exchange heat with an outdoor environment to discharge heat absorbed by the indoor heat exchanger to the outdoor environment when the air conditioner operates in a cooling mode, or to absorb heat from the outdoor environment and to transfer the heat to the indoor environment by the indoor heat exchanger when the air conditioner operates in a heating mode.
When the air conditioner operates in winter severe cold weather, frost is easily condensed on the outdoor heat exchanger due to the low temperature of the outdoor environment, and the condensed frost can block the heat exchange efficiency of the outdoor heat exchanger and the outdoor environment; aiming at the problem of frost condensation and formation of the outdoor heat exchanger, the outdoor defrosting device is set to be capable of defrosting the outdoor heat exchanger so as to reduce the amount of frost condensed on the outdoor heat exchanger and ensure the heating performance of the air conditioner in winter in severe cold weather.
In the embodiment of the disclosure, the outdoor defrosting device mainly comprises a heating device, a water storage device, a spraying device and the like; the water storage device is set to store water which can be used for defrosting, the heating device is set to controllably heat the water stored in the water storage device, and the spraying device is set to controllably spray the water in the water storage device to the outdoor heat exchanger of the outdoor unit, so that the heat of hot water is utilized to melt frost on the outdoor heat exchanger, and the purpose of defrosting and defrosting the outdoor unit is achieved.
In an alternative embodiment, the water storage means is a water storage tank having a water storage chamber defined therein in which water for defrosting can be stored; optionally, the outside of the water storage cavity is wrapped with a heat insulation layer, so that heat exchange between water in the water storage cavity and the external environment is isolated by the heat insulation layer, and the influence of the external environment on the temperature of the water in the water storage cavity is reduced.
Optionally, the water storage device further comprises a heating water outlet pipeline, a heating water return pipeline and a defrosting water outlet pipeline which are respectively communicated with the water storage cavity;
the heating water outlet pipeline and the heating water return pipeline are respectively communicated with the heating device, so that the water storage cavity and the heating device form a circulating flow path for heating water, low-temperature water to be heated flows out of the heating water outlet pipeline to the heating device, the heating device heats the low-temperature water into high-temperature water, and then the high-temperature water flows back to the water storage cavity through the heating water return pipeline.
The heating water outlet pipeline is provided with a first water pump, and the first water pump is used for driving water to flow from the water storage cavity to the heating device along the heating water outlet pipeline; and a second water pump is arranged on the heating water return pipeline and used for driving water to flow back to the water storage cavity from the heating device along the heating water return pipeline.
The defrosting water outlet pipeline is communicated with the spraying device, and a third water pump is arranged on the defrosting pipeline and is used for driving water to flow to the spraying device from the water storage cavity along the defrosting water storage pipeline, so that the spraying device can spray hot water in the water storage cavity onto the outdoor heat exchanger of the outdoor unit.
Optionally, the heating device comprises a solar heating device, which can convert the radiation energy of the sun into heat energy and use the converted heat energy to heat the low-temperature water delivered by the heating water outlet pipeline.
The solar heating device mainly comprises a heat absorbing plate, a cover plate, a shell and the like, wherein a space for accommodating the heat absorbing plate is defined in the shell, the cover plate covers one side face of the shell, sunlight is radiated on the heat absorbing plate through the cover plate, and the heat absorbing plate can absorb energy of solar radiation and convert the energy into heat energy.
The heat absorption plate is internally provided with a working medium flow path, two ports of the working medium flow path are respectively communicated with a heating water outlet pipeline and a heating water return pipeline, water conveyed by the heating water outlet pipeline is heated and heated in the process of flowing through the working medium flow path, and then flows back to the water storage cavity through the heating water return pipeline, so that heat energy converted by the heat absorption plate is transferred to circulating water.
Optionally, the heating device includes an electric heating device, which can convert electric energy into heat energy, and the converted heat energy is used to heat the low-temperature water delivered by the heating water outlet pipeline.
In one embodiment, the electric heating device comprises a resistance wire assembly and a power supply assembly, wherein the resistance wire assembly can be directly arranged in the water storage cavity, and after the resistance wire assembly is electrified, the resistance wire assembly can generate a large amount of heat for directly heating water in the water storage cavity; the power supply assembly is electrically connected with the resistance wire assembly, and the power supply assembly can be a battery or a power line and other parts which can be connected with an external power supply.
Here, the electric heating device is further provided with a power adjusting assembly, and the heating rate of the resistance wire assembly can be changed by changing the current or voltage supplied to the resistance wire assembly, so that the heating power of the electric heating device can be adjusted.
Alternatively, the heating device includes a heat storage device configured to store heat of a compressor of the outdoor unit.
The heat storage device comprises a heat conduction pipe which is arranged around the outer side of the compressor body, the heat conduction pipe can be in direct heat conduction contact with the compressor or in indirect heat conduction contact with the compressor through fins and the like, and the heat generated by the compressor during operation can be conducted to the heat conduction pipe so as to increase the heat of the heat conduction pipe;
the heat conducting pipe is internally used as a working medium flow path, two ends of the heat conducting pipe are respectively communicated with the heating water outlet pipeline and the heating water return pipeline, water in the process of being conveyed by the heating water outlet pipeline is heated and heated in the process of flowing through the working medium flow path, and then the water flows back to the water storage cavity through the heating water return pipeline, so that heat energy converted by the heat absorbing plate is transferred to circulating water.
Optionally, the heating device includes an exhaust branch, two ends of the exhaust branch are respectively connected in parallel to an exhaust pipe of a compressor of the outdoor unit and a liquid outlet pipe of an indoor heat exchanger of the indoor unit in the heating mode, and the exhaust branch can heat water in the water storage device by using heat of a high-temperature refrigerant discharged from the compressor through an exhaust port.
At least part of pipelines of the exhaust branch are arranged in the water storage cavity and are made of heat conduction materials; the high temperature refrigerant discharged from the air outlet of the compressor partially flows along the original exhaust pipeline of the air conditioner, and the other part flows along the exhaust branch and exchanges heat with the refrigerant in the water storage cavity when flowing through the partial pipelines so as to heat the water in the water storage cavity by using the heat of the high temperature refrigerant.
In this embodiment, the air conditioner is further provided with two control valves, wherein the two control valves include a first control valve arranged in the exhaust pipe, and the first control valve can be used for controlling the on-off state and the refrigerant flow rate of a refrigerant flow path flowing through the exhaust pipe; and the second control valve is arranged on the exhaust branch and can be used for controlling the on-off state and the refrigerant flow of the refrigerant flow path flowing through the exhaust branch.
In various embodiments of the present disclosure, the heating device of the air conditioner may be one or more of the above-described various heating device types, so that the water in the water storage device can be heated by one of the heating devices alone, or by more than one water storage device simultaneously.
Optionally, if the heating device of the air conditioner comprises a solar heating device and a heat storage device, the solar heating device and the heat storage device are both communicated with the water storage cavity of the water storage device through a heating water outlet pipeline and a heating water return pipeline; here, in order to simplify the number of pipes, both the solar heating apparatus and the heat storage apparatus may be connected in parallel, and a branch control valve may be provided on each parallel pipe, respectively, so that the opening or closing operation of the heating function of the solar heating apparatus and the heat storage apparatus may be achieved by controlling the opening and closing state of each branch control valve.
When the branch control valve is in an open state, the parallel pipeline where the corresponding solar heating device or heat storage device is located is conducted, so that the heating function of the solar heating device or heat storage device on water flowing through the parallel pipeline is started; when the branch control valve is in a closed state, the parallel pipeline where the corresponding solar heating device or heat storage device is located is blocked, so that the heating function of the solar heating device or heat storage device on water is closed.
Optionally, the power supply assembly of the electric heating device is provided with a switch assembly, and the switch assembly can be used for controlling the on-off device of the power supply assembly to the power supply circuit of the resistance wire assembly, so as to switch on the power supply circuit when the switch assembly is in an on state, and switch off the power supply circuit when the switch assembly is in an off state, thereby realizing the on-off operation of the electric heating device.
Optionally, the heating device using the exhaust branch may implement the on-off operation of the heating function of the heating device of this type by controlling the on-off state of the second control valve disposed in the exhaust branch.
In an embodiment of the disclosure, the spray device comprises a spray pipe.
The spray pipe is arranged along the longitudinal direction or the transverse direction of the outdoor heat exchanger, or the spray pipe is arranged above the outdoor heat exchanger; one or more than one spraying hole is formed in the spraying pipe, and water pumped by the third water pump can be sprayed to the outdoor heat exchanger under the action of water pressure.
Here, the number of the spray pipes is one or more than one; the plurality of spray pipes are arranged in parallel or in a cross mode, so that water sprayed out by the spray pipes can cover most of the area of the outdoor heat exchanger, the defrosting effect of the outdoor heat exchanger is guaranteed, and excessive condensation of local frost is avoided.
Optionally, the outdoor defrosting device further comprises a water replenishing device, and the water replenishing device can be used for replenishing water into the water storage device of the water storage device.
In one embodiment, the water supplementing device comprises a water supplementing pipe, one end of the water supplementing pipe is communicated with the water storage cavity, the other end of the water supplementing pipe can be communicated with a household water source, a fourth water pump is arranged on the water supplementing pipe, and the fourth water pump can be used for driving water to be conveyed from one end of the household water source to one end of the water storage cavity, so that water consumed in the water storage cavity can be supplemented.
Fig. 1 is a schematic flow chart of a control method for defrosting an air conditioner according to an embodiment of the present disclosure.
As shown in fig. 1, an embodiment of the present disclosure provides a control method for defrosting an air conditioner, including:
s101, when the air conditioner runs in a heating mode, adjusting a control valve to a first flow opening according to the indoor environment temperature, the indoor coil temperature and the water temperature in a water storage device;
generally, the problem of frost formation of an indoor unit of an air conditioner mainly occurs in cold weather in winter, and at the moment, a user generally sets the air conditioner to operate in a heating mode so as to heat and raise the temperature of an indoor environment by using the air conditioner; therefore, the control method for defrosting an air conditioner of the embodiment of the present disclosure is a related control flow executed in the case of the air conditioner operating in the heating mode.
Optionally, a temperature sensor is arranged at a coil pipe position of an indoor unit of the air conditioner, and the temperature sensor can be used for detecting the real-time temperature of the coil pipe of the indoor unit; therefore, before step S101, the real-time temperature of the coil of the indoor unit detected by the temperature sensor is obtained and is used as the indoor coil temperature;
optionally, the indoor unit of the air conditioner is further provided with a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the indoor environment where the indoor unit is located; therefore, before step S101, the real-time temperature of the indoor environment detected by the temperature sensor is obtained and taken as the indoor environment temperature;
optionally, the water storage device further comprises a temperature sensor, and the temperature sensor can be used for detecting the real-time temperature of the water stored in the water storage device; therefore, before step S101, the real-time temperature of the water detected by the temperature sensor is obtained and used as the water temperature of the water storage device;
in step S101, adjusting the control valve to a first flow opening according to the indoor ambient temperature, the indoor coil temperature and the water temperature in the water storage device corresponding to the air conditioner includes: calculating the temperature difference between the indoor coil temperature and the indoor environment temperature; and adjusting the control valve to a first flow opening degree according to the temperature difference, the temperature of the indoor coil and the water temperature in the water storage device.
Here, under the condition that the outdoor environment is relatively severe, the outdoor low-temperature environment can simultaneously affect the air conditioner and the indoor environment where the air conditioner is located, for example, frost on the outdoor heat exchanger is condensed due to the outdoor low-temperature environment, the heat exchange efficiency of the outdoor heat exchanger and the outdoor environment is reduced, and further the temperature of the indoor coil of the indoor unit is reduced; and although the outdoor environment and the outdoor environment are separated by the building wall, heat exchange still exists, heat of the indoor environment with higher temperature is conducted to the outdoor environment through the building wall and dissipated, and then the temperature of the indoor environment is reduced.
Thus, harsh outdoor environmental conditions can result in both a decrease in the indoor coil temperature and the indoor ambient temperature, with greater impact on the indoor ambient temperature; therefore, the worse the outdoor environment condition is, the larger the variation of the indoor environment temperature is, and the larger the difference of the temperature between the indoor environment temperature and the indoor coil temperature is; conversely, the smaller the difference in temperature between the indoor ambient temperature and the indoor coil temperature.
Therefore, the disclosed embodiment controls the first flow opening of the control valve according to the temperature difference between the indoor coil temperature and the indoor environment temperature, and by combining the temperature of the indoor coil and the water temperature in the water storage device.
In an alternative embodiment, the step of adjusting the control valve to a first flow opening based on the temperature differential, the indoor coil temperature and the water temperature in the reservoir comprises: when the temperature difference value meets the difference condition, the temperature of the indoor coil pipe meets the temperature condition, and the water temperature in the water storage device does not meet the first water temperature condition, controlling the second control valve to be opened at a first flow opening smaller than the maximum opening; and when the water temperature in the water storage device meets the first water temperature condition, controlling to close the second control valve.
Optionally, the first water temperature condition comprises: the water temperature in the water storage device is less than a first set water temperature. Here, the first set water temperature is set to a value ranging from 12 ℃ to 15 ℃.
Optionally, the difference condition includes: the temperature difference is smaller than a set temperature difference threshold.
Optionally, the temperature conditions include: the indoor coil temperature is less than the set temperature threshold.
In the embodiment of the disclosure, under the condition that the temperature difference value meets the preset temperature difference condition, the temperature of the indoor coil meets the preset temperature condition, and the water temperature in the water storage device does not meet the first water temperature condition, because the outdoor environment condition has a great influence on the indoor environment temperature and the indoor coil temperature, the air conditioner will trigger the defrosting mode to be executed, so that the second control valve is controlled to be opened to heat the water in the water storage device, and the water temperature requirement required by the defrosting mode can be met; and under the condition that the water temperature in the water storage device meets the first water temperature condition, the second control valve is closed at the moment, so that all refrigerants flow along the exhaust pipeline on the premise that the water temperature in the water storage device meets the defrosting water temperature requirement, and the heating performance of the air conditioner in cold weather in winter is ensured.
S102, when the control valve of the air conditioner runs for a set time length at a first flow opening and the water temperature of the water storage device does not meet the defrosting water temperature condition, adjusting the control valve to a second flow opening based on the temperature attenuation information so that the water temperature in the water storage device meets the defrosting water temperature condition.
Optionally, the set time period is 8 minutes to 12 minutes.
Optionally, the defrosting water temperature condition in step S102 includes: the water temperature in the water storage device is larger than or equal to a set water temperature threshold value.
In the embodiment of the disclosure, the defrosting mode comprises the step of starting a spraying device to spray and defrost the outdoor heat exchanger.
Here, the water temperature threshold is set to be a preset water temperature threshold for indicating that a good defrosting effect can be achieved. Therefore, when the spraying device sprays water with the water temperature which is greater than or equal to the set water temperature threshold value onto the outdoor heat exchanger, the water temperature is higher, so that the heat carried by the spraying water can melt frost condensed on the outdoor heat exchanger, and a higher defrosting and deicing effect is achieved.
Optionally, the value of the set water temperature threshold is a temperature value greater than or equal to 5 ℃, such as 5 ℃, 8 ℃, and the like.
According to the control method for defrosting of the air conditioner, the heating device is controlled according to the indoor environment temperature, the indoor coil pipe temperature and the water temperature of the water storage device, the water temperature in the water storage device can not meet the preset defrosting water temperature condition, and the control condition is further carried out according to the temperature attenuation information, so that the spray water of the air conditioner in the process of executing a defrosting mode can always meet the water temperature requirement for achieving a better defrosting effect, and the problem that the defrosting effect is influenced due to uncontrollable water temperature caused by the influence of the outdoor environment in the related technology is effectively solved.
Fig. 2 is a flowchart illustrating a control method for defrosting an air conditioner according to another embodiment of the present disclosure.
As shown in fig. 2, adjusting the control valve to the second flow opening based on the temperature decay information in step S102 includes:
s201, acquiring the temperature of an indoor coil and the water temperature in a water storage device;
here, the indoor coil temperature acquired in step S201 includes a temperature at an initial time and a temperature at an end time within a set time period to determine a decay value within the set time period from the two temperatures;
s202, calculating a first temperature attenuation value of the indoor coil temperature within a set time length;
calculating the difference between the indoor coil temperature corresponding to the initial time and the indoor coil temperature corresponding to the end time within the set time length to obtain a first temperature attenuation value;
s203, judging whether the first temperature attenuation value meets a preset attenuation condition, if so, executing a step S204, otherwise, returning to the step S201;
here, the preset attenuation conditions include: the temperature is greater than or equal to a preset first attenuation threshold.
Optionally, the first attenuation threshold value ranges from 15 ℃ to 18 ℃;
s204, judging whether the water temperature in the water storage device is a first water temperature condition or not, if not, executing a step S205, and if so, ending the process;
s205, controlling and increasing the opening of the second control valve;
in the disclosed embodiment, the opening degree of the second control valve controlled in step S205 is adjusted on the basis of the first flow rate opening degree.
Here, after the control valve of the air conditioner is operated for a set time period at the first flow opening, if a first temperature attenuation value of the indoor coil temperature within the set time period meets a preset attenuation condition and the water temperature of the water storage device does not meet a defrosting water temperature condition, it is indicated that the opening of the second control valve of the air conditioner is smaller at this time, the heating rate of water in the water storage device is slower, meanwhile, the outdoor environment condition is still worse and the heating influence on the indoor coil is larger, so that the situation that the water temperature does not meet the first water temperature condition when the air conditioner triggers the defrosting mode may be caused, and the defrosting effect of the defrosting mode is not good; therefore, the opening degree of the second control valve needs to be increased to increase the flow rate of the refrigerant flowing through the exhaust branch, so as to increase the heating rate of the water in the water storage device.
Fig. 3 is a flowchart illustrating a control method for defrosting an air conditioner according to another embodiment of the present disclosure.
As shown in fig. 3, adjusting the control valve to the second flow opening degree based on the temperature decay information in step S102 includes:
s301, acquiring the temperature of an indoor coil, the indoor environment temperature and the water temperature in a water storage device;
here, the indoor coil temperature acquired in step S301 includes a temperature at an initial time and a temperature at an end time within a set time period;
similarly, the indoor environment temperature obtained in step S301 includes the temperature at the initial time and the temperature at the end time within the set duration;
s302, calculating a second temperature attenuation value of the temperature difference value between the indoor coil temperature and the indoor environment temperature within a set time length;
calculating a difference value between the indoor coil temperature corresponding to the initial time within the set time length and the indoor environment temperature corresponding to the initial time to obtain a first temperature difference value;
calculating a difference value between the indoor coil temperature corresponding to the ending moment in the set time length and the indoor environment temperature corresponding to the ending moment to obtain a second temperature difference value;
further calculating a temperature difference value between the first temperature difference value and the second temperature difference value to obtain a second temperature attenuation value;
s303, judging whether the second temperature attenuation value meets a preset attenuation condition, if so, going to step S304, and if not, returning to step S301;
here, the preset attenuation conditions include: the temperature difference is greater than or equal to a preset second attenuation threshold.
S304, judging whether the water temperature in the water storage device is a first water temperature condition or not, if not, executing the step S305, and if so, ending the process;
s305, controlling to increase the opening of the second control valve;
in the disclosed embodiment, the opening degree of the second control valve controlled at step S305 is adjusted on the basis of the first flow rate opening degree.
Here, after the control valve of the air conditioner is operated for a set time period at the first flow opening, if the second temperature attenuation value of the temperature difference value in the set time period meets the preset attenuation condition and the water temperature of the water storage device does not meet the defrosting water temperature condition, it is described that the opening of the second control valve of the air conditioner is smaller at this time, the heating rate of the water in the water storage device is slower, meanwhile, the outdoor environment condition is still worse and the heating influence on the indoor coil is larger, so that the situation that the water temperature still does not meet the first water temperature condition when the air conditioner triggers the defrosting mode may be caused, and the defrosting effect of the defrosting mode is not good; therefore, the opening degree of the second control valve needs to be increased to increase the flow rate of the refrigerant flowing through the exhaust branch, so as to increase the heating rate of the water in the water storage device.
Alternatively, the adjustment manner of increasing the opening degree of the second control valve in step S205 or S305 in the above embodiment may be a stepwise adjustment manner.
For example, when the first temperature attenuation value or the second temperature attenuation value satisfies the attenuation condition and the water temperature in the water storage device does not satisfy the first water temperature condition, the second control valve of the air conditioner is opened at 1/3 with the maximum opening degree, and the heating time period is set to 10 minutes;
controlling to increase the opening degree of the second control valve to 2/3 of the maximum opening degree for 10 minutes if the water temperature in the water storage device does not satisfy the first water temperature condition after the second control valve is opened at 1/3 of the maximum opening degree for 10 minutes;
if the water temperature in the water storage device does not satisfy the first water temperature condition after the second control valve is opened at 2/3 of the maximum opening degree for 10 minutes, control increases the opening degree of the second control valve to the maximum opening degree.
Therefore, the problem that the flow of the exhaust pipeline is changed too much along with the change of the opening degree of the exhaust branch, and the indoor heating temperature is reduced and fluctuated can be avoided by adopting a step-type adjusting mode; meanwhile, the water in the water storage device can reach the set water temperature condition as soon as possible.
In an alternative embodiment, the set temperature difference threshold of the temperature difference condition and the set temperature threshold of the temperature condition related to step S101 are preset fixed values.
In yet another alternative embodiment, the set temperature difference threshold and/or the set temperature threshold referred to in the step S101 is determined according to a wind speed gear of an internal fan of the air conditioner.
Here, when the inner fan of the indoor unit of the air conditioner operates at different wind speeds, the heat exchange efficiency between the indoor environment and the indoor heat exchanger also changes, and therefore, in order to reduce the problem of the determination error caused by the operation of the inner fan of the indoor unit at different wind speed gears, before the step S101 is executed, the control method in the embodiment of the present disclosure further includes: acquiring a current wind speed gear of an inner fan of the air conditioner; and determining a set temperature difference threshold value and/or a set temperature threshold value according to the gear position.
Optionally, the air conditioner is preset with an association relationship, and the wind speed gear and the set temperature threshold and/or the set temperature threshold in the association relationship are/is a negative correlation corresponding relationship; therefore, the set temperature difference threshold value and/or the set temperature threshold value corresponding to the wind speed gear can be obtained through matching according to the preset incidence relation.
For example, table 1 shows the corresponding relationship between different wind speed gears of the internal fan and the set temperature difference threshold and the set temperature threshold, as shown in the following table:
wind speed gear Setting the temperature difference threshold (Unit:. degree. C.) Setting temperature threshold (Unit ℃)
Low wind gear 25 45
Apoplexy gear 20 42
High wind gear 20 42
TABLE 1
In an alternative embodiment, the second control valve is controlled to be closed when the air conditioner enters the defrosting mode.
Here, when the air conditioner operates in the defrosting mode, because the defrosting target is the outdoor heat exchanger, the influence of temperature disturbance on normal heating operation of the air conditioner may be caused, and therefore when the air conditioner enters the defrosting mode, the second control valve is controlled to be closed, so that all high-temperature refrigerants discharged by the compressor flow through the exhaust pipeline and flow to the indoor heat exchanger along with the refrigerant flow direction limited by the refrigeration mode.
In an optional embodiment, the control steps of the control method for defrosting an air conditioner further include: and when the water quantity in the water storage device does not meet the preset water quantity condition, controlling to supplement water to the water storage device.
In the implementation of the disclosure, a water level detector is further arranged in the water storage device, the water level detector can detect water level data of water stored in the water storage cavity, and thus the air conditioner can calculate the real-time water volume in the water storage cavity according to the height change of the water level data of the stored water.
Here, in the case where the water amount in the water storage device does not satisfy the water amount condition, when the air conditioner starts the defrosting mode next time, the process of spraying and defrosting may occur due to the insufficient water amount, and thus the water amount in the water storage device of the air conditioner needs to satisfy the water amount condition.
Optionally, the water amount conditions include: the water quantity in the water storage device is larger than or equal to the set water quantity threshold value.
Here, the set water amount threshold may be a fixed value such as 1/2, 1/3, etc. of the total water amount.
Alternatively, the set water volume threshold may be dynamically set according to an estimated frost formation degree of the outdoor unit of the air conditioner.
In an optional embodiment, the estimation of the frosting degree of the outdoor unit may be implemented according to the current outdoor environment temperature, for example, when the outdoor environment temperature is lower, the outdoor environment is worse, and the estimated frosting degree of the air conditioner is higher, at this time, the spraying device needs more water to achieve a better defrosting effect, so that the set water threshold may be set to a higher value, such as 1/2,2/3 and the like of the total water; when the outdoor environment temperature is high, the outdoor environment is good, the estimated frosting degree of the air conditioner is low, and at the moment, the water quantity required by the spraying device for realizing a good defrosting effect is small, so that the set water quantity threshold value can be set to be a low value, such as 1/4,1/3 and the like of the total water quantity.
Here, since the source of the replenishing water is a domestic water source, the temperature is generally low; if water is supplemented in the process of the air conditioner running in the defrosting mode, the water temperature of the water mixed in the water storage cavity is suddenly reduced, so that the air conditioner is easily interrupted and the defrosting mode is easily exited; therefore, the water replenishing operation of the water storage device in the embodiment of the disclosure is performed on the premise that the air conditioner does not enter the defrosting mode, so as to ensure the normal operation of the defrosting mode of the air conditioner.
Fig. 4 is a schematic structural diagram of a control device for defrosting of an air conditioner according to an embodiment of the present disclosure.
As shown in fig. 4, the embodiment of the present disclosure also provides a control apparatus for defrosting an air conditioner, which is applicable to an air conditioner, and enables the air conditioner to perform the control flow shown in the above embodiment; the control device 4 includes:
a first opening adjusting module 41 configured to adjust the control valve to a first flow opening according to the indoor ambient temperature, the indoor coil temperature and the water temperature in the water storage device when the air conditioner operates in the heating mode;
and a second opening degree adjusting module 42 configured to adjust the control valve to a second flow opening degree based on the temperature decay information so that the water temperature in the water storage device satisfies the defrosting water temperature condition when the control valve of the air conditioner operates at the first flow opening degree for a set length of time and the water temperature of the water storage device does not satisfy the defrosting water temperature condition.
In an alternative embodiment, the first opening degree adjusting module 41 is configured to:
calculating the temperature difference between the indoor coil temperature and the indoor environment temperature;
and adjusting the control valve to a first flow opening degree according to the temperature difference value, the temperature of the indoor coil and the water temperature in the water storage device.
In an alternative embodiment, the first opening degree adjusting module 41 is configured to:
when the temperature difference value meets the difference condition, the temperature of the indoor coil pipe meets the temperature condition, and the water temperature in the water storage device does not meet the first water temperature condition, controlling the second control valve to be opened at a first flow opening smaller than the maximum opening;
and when the water temperature in the water storage device meets the first water temperature condition, controlling to close the second control valve.
In an alternative embodiment, the second opening degree adjustment module 42 is configured to:
when a first temperature attenuation value of the indoor coil pipe temperature within a set time meets a preset attenuation condition and the water temperature in the water storage device does not meet the first water temperature condition, controlling to increase the opening degree of a second control valve; or,
and when a second temperature attenuation value of the temperature difference value in a set time length meets a preset attenuation condition and the water temperature in the water storage device does not meet the first water temperature condition, controlling to increase the opening degree of the second control valve.
In an alternative embodiment, the preset decay condition comprises: the temperature or the temperature difference is greater than or equal to a preset attenuation threshold.
In an alternative embodiment, the first water temperature condition comprises: the water temperature in the water storage device is smaller than a first set water temperature.
In an alternative embodiment, the difference condition comprises: the temperature difference is smaller than a set temperature difference threshold.
In an alternative embodiment, the temperature conditions include: the indoor coil temperature is less than the set temperature threshold.
In an alternative embodiment, the temperature difference threshold value and/or the set temperature threshold value is determined according to the wind speed gear of the internal fan of the air conditioner.
In an optional embodiment, according to a preset incidence relation, a temperature difference threshold value and/or a set temperature threshold value corresponding to a wind speed gear are obtained through matching;
and the wind speed gear and the temperature difference threshold value and/or the set temperature threshold value in the incidence relation are in a negative correlation corresponding relation.
In an alternative embodiment, the second opening degree adjusting module 42 is further configured to: and when the air conditioner enters the defrosting mode, controlling to close the second control valve.
In an alternative embodiment, the control device 4 further comprises a water replenishment control module configured to control replenishment of the water storage device when the amount of water in the water storage device does not satisfy the water amount condition.
The specific execution manner of the control flow executed by the control device to control the air conditioner in the present application may refer to the corresponding part of the foregoing embodiments of the control method, which is not described herein again.
The embodiment of the disclosure also provides an air conditioner, which comprises an indoor unit, an outdoor unit and an outdoor defrosting device, wherein the outdoor defrosting device comprises an exhaust branch, a water storage device, a spraying device and a control valve; the two ends of the exhaust branch are respectively connected in parallel with an exhaust pipeline of a compressor of the outdoor unit and a liquid outlet pipeline of an indoor heat exchanger of the indoor unit in a heating mode, the exhaust branch is connected with the water storage device and is set to heat water stored in the water storage device by utilizing the exhaust heat of the compressor; the spraying device is communicated with the water storage device and is set to controllably spray water in the water storage device to the outdoor heat exchanger of the outdoor unit; the control valve comprises a first control valve arranged in the exhaust pipeline and a second control valve arranged in the exhaust branch; the air conditioner further comprises the control device provided in the previous embodiment.
Embodiments of the present disclosure also provide a computer-readable storage medium storing computer-executable instructions configured to perform the control method for defrosting an air conditioner provided in the above embodiments.
Embodiments of the present disclosure also provide a computer program product including a computer program stored on a computer-readable storage medium, the computer program including program instructions that, when executed by a computer, cause the computer to perform the control method for defrosting an air conditioner provided in the above-described embodiments.
The computer readable storage medium described above may be a transitory computer readable storage medium or a non-transitory computer readable storage medium.
An embodiment of the present disclosure further provides an electronic device, a structure of which is shown in fig. 5, where the electronic device includes:
at least one processor (processor)500, such as processor 500 in FIG. 5; and a memory (memory)501, and may further include a Communication Interface 502 and a bus 503. The processor 500, the communication interface 502, and the memory 501 may communicate with each other via a bus 503. Communication interface 502 may be used for information transfer. The processor 500 may call logic instructions in the memory 501 to execute the control method for air conditioner defrosting provided in the above-described embodiment.
In addition, the logic instructions in the memory 501 may be implemented in the form of software functional units and may be stored in a computer readable storage medium when the logic instructions are sold or used as independent products.
The memory 501 is a computer-readable storage medium, and can be used for storing software programs, computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 500 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 501, that is, implements the control method for defrosting an air conditioner in the above-described method embodiment.
The memory 501 may include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required for at least one function; the storage data area may store data created according to the use of the terminal device, and the like. Further, the memory 501 may include a high speed random access memory and may also include a non-volatile memory.
The technical solution of the embodiments of the present disclosure may be embodied in the form of a software product, where the computer software product is stored in a storage medium and includes one or more instructions to enable a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method of the embodiments of the present disclosure. And the aforementioned storage medium may be a non-transitory storage medium comprising: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other various media capable of storing program codes, and may also be a transient storage medium.
The above description and drawings sufficiently illustrate embodiments of the disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, process, and other changes. The examples merely typify possible variations. Individual components and functions are optional unless explicitly required, and the sequence of operations may vary. Portions and features of some embodiments may be included in or substituted for those of others. The scope of the embodiments of the present disclosure includes the full ambit of the claims, as well as all available equivalents of the claims. As used in this application, although the terms "first," "second," etc. may be used in this application to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be termed a second element, and, similarly, a second element could be termed a first element, unless the meaning of the description changes, so long as all occurrences of the "first element" are renamed consistently and all occurrences of the "second element" are renamed consistently. The first and second elements are both elements, but may not be the same element. Furthermore, the words used in the specification are words of description for example only and are not limiting upon the claims. As used in the description of the embodiments and the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. Similarly, the term "and/or" as used in this application is meant to encompass any and all possible combinations of one or more of the associated listed. Furthermore, the terms "comprises" and/or "comprising," when used in this application, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of additional identical elements in the process, method or apparatus comprising the element. In this document, each embodiment may be described with emphasis on differences from other embodiments, and the same and similar parts between the respective embodiments may be referred to each other. For methods, products, etc. of the embodiment disclosures, reference may be made to the description of the method section for relevance if it corresponds to the method section of the embodiment disclosure.
Those of skill in the art would appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software may depend upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the disclosed embodiments. It can be clearly understood by the skilled person that, for convenience and brevity of description, the specific working processes of the system, the control apparatus and the unit described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the embodiments disclosed herein, the disclosed methods, products (including but not limited to devices, apparatuses, etc.) may be implemented in other ways. For example, the above-described apparatus embodiments are merely illustrative, and for example, the division of the units may be only one type of logical functional division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or may be integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form. The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one position, or may be distributed on multiple network units. Some or all of the units can be selected according to actual needs to implement the present embodiment. In addition, functional units in the embodiments of the present disclosure may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the present disclosure. In this regard, each block in the flowchart or block diagrams may represent a module, segment, or portion of code, which comprises one or more executable instructions for implementing the specified logical function(s). In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks shown in succession may, in fact, be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending upon the functionality involved. Each block of the block diagrams and/or flowchart illustrations, and combinations of blocks in the block diagrams and/or flowchart illustrations, can be implemented by special purpose hardware-based systems that perform the specified functions or acts, or combinations of special purpose hardware and computer instructions.

Claims (7)

1. The control method for defrosting of the air conditioner is characterized in that the air conditioner comprises an indoor unit, an outdoor unit and an outdoor defrosting device, wherein the outdoor defrosting device comprises an exhaust branch, a water storage device, a spraying device and a control valve; the two ends of the exhaust branch are respectively connected in parallel with an exhaust pipeline of a compressor of the outdoor unit and a liquid outlet pipeline of an indoor heat exchanger of the indoor unit in a heating mode, and the exhaust branch is connected with the water storage device and is set to heat water stored in the water storage device by utilizing the exhaust heat of the compressor; the spraying device is communicated with the water storage device and is arranged to controllably spray water in the water storage device to the outdoor heat exchanger of the outdoor unit; the control valve comprises a first control valve arranged on the exhaust pipeline and a second control valve arranged on the exhaust branch, the first control valve is used for controlling the on-off state and the refrigerant flow of a refrigerant flow path flowing through the exhaust pipeline, and the second control valve is used for controlling the on-off state and the refrigerant flow of the refrigerant flow path flowing through the exhaust branch;
the control method comprises the following steps:
when the air conditioner operates in a heating mode, adjusting the control valve to a first flow opening according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device;
when a control valve of the air conditioner runs for a set time at the first flow opening and the water temperature of the water storage device does not meet the defrosting water temperature condition, adjusting the control valve to a second flow opening based on temperature attenuation information so that the water temperature in the water storage device meets the defrosting water temperature condition;
wherein, according to the indoor ambient temperature that the air conditioner corresponds, indoor coil pipe temperature and the temperature of water in the water storage device, adjust control valve to first flow aperture includes:
calculating a temperature difference between the indoor coil temperature and the indoor ambient temperature;
adjusting the control valve to the first flow opening based on the temperature difference, the indoor coil temperature, and the water temperature within the water storage device;
wherein said adjusting said control valve to said first flow opening based on said temperature difference, said indoor coil temperature and said water temperature within said water storage device comprises:
when the temperature difference value meets a difference condition, the temperature of the indoor coil pipe meets a temperature condition, and the water temperature in the water storage device does not meet a first water temperature condition, controlling the second control valve to be opened at a first flow opening smaller than a maximum opening;
when the water temperature in the water storage device meets the first water temperature condition, controlling to close the second control valve;
wherein the first water temperature condition comprises a water temperature in the water storage device being less than a first set water temperature; the difference condition comprises that the temperature difference is smaller than a set temperature difference threshold; the temperature condition comprises that the temperature of the indoor coil is less than a set temperature threshold;
wherein said adjusting the control valve to a second flow opening based on temperature decay information comprises:
when a first temperature attenuation value of the indoor coil pipe temperature within a set time length meets a preset attenuation condition and the water temperature in the water storage device does not meet the first water temperature condition, controlling and improving the opening degree of the second control valve; or,
when a second temperature attenuation value of the temperature difference value in a set time length meets a preset attenuation condition and the water temperature in the water storage device does not meet the first water temperature condition, controlling and increasing the opening degree of the second control valve;
wherein the preset attenuation condition comprises that the temperature or the temperature difference is greater than or equal to a preset attenuation threshold; the adjustment mode of increasing the opening degree of the second control valve adopts a step-type adjustment mode.
2. The control method according to claim 1, wherein the set temperature difference threshold value and/or the set temperature threshold value is determined according to a wind speed gear of an internal fan of the air conditioner.
3. The control method according to claim 2, wherein determining the temperature difference threshold value and/or the set temperature threshold value according to a wind speed gear of an internal fan of the air conditioner comprises:
according to a preset incidence relation, matching to obtain the temperature difference threshold value and/or the set temperature threshold value corresponding to the wind speed gear;
and the wind speed gear and the temperature difference threshold value and/or the set temperature threshold value in the correlation are in negative correlation.
4. The control method according to any one of claims 1 to 3, characterized by further comprising:
and when the air conditioner enters a defrosting mode, controlling to close the second control valve.
5. The control method according to any one of claims 1 to 3, characterized by further comprising:
and when the water quantity in the water storage device does not meet the water quantity condition, controlling to supplement water to the water storage device.
6. A control device for defrosting of an air conditioner is characterized in that the air conditioner comprises an indoor unit, an outdoor unit and an outdoor defrosting device, wherein the outdoor defrosting device comprises an exhaust branch, a water storage device, a spraying device and a control valve; the two ends of the exhaust branch are respectively connected in parallel with an exhaust pipeline of a compressor of the outdoor unit and a liquid outlet pipeline of an indoor heat exchanger of the indoor unit in a heating mode, and the exhaust branch is connected with the water storage device and is set to heat water stored in the water storage device by utilizing the exhaust heat of the compressor; the spraying device is communicated with the water storage device and is arranged to controllably spray water in the water storage device to the outdoor heat exchanger of the outdoor unit; the control valve comprises a first control valve arranged on the exhaust pipeline and a second control valve arranged on the exhaust branch, the first control valve is used for controlling the on-off state and the refrigerant flow of a refrigerant flow path flowing through the exhaust pipeline, and the second control valve is used for controlling the on-off state and the refrigerant flow of the refrigerant flow path flowing through the exhaust branch;
the control device includes:
a first opening adjusting module configured to adjust the control valve to a first flow opening according to an indoor ambient temperature, an indoor coil temperature and a water temperature in the water storage device when the air conditioner operates in a heating mode;
a second opening adjustment module configured to adjust a control valve of the air conditioner to a second flow opening based on temperature decay information such that a water temperature within the water storage device satisfies a defrost water temperature condition when the control valve operates at the first flow opening for a set length of time and the water temperature of the water storage device does not satisfy the defrost water temperature condition;
wherein, according to the indoor ambient temperature that the air conditioner corresponds, indoor coil pipe temperature and the temperature of water in the water storage device, adjust control valve to first flow aperture includes:
calculating a temperature difference between the indoor coil temperature and the indoor ambient temperature;
adjusting the control valve to the first flow opening based on the temperature difference, the indoor coil temperature, and the water temperature within the water storage device;
wherein said adjusting said control valve to said first flow opening based on said temperature difference, said indoor coil temperature and said water temperature within said water storage device comprises:
when the temperature difference value meets a difference condition, the temperature of the indoor coil meets a temperature condition, and the water temperature in the water storage device does not meet a first water temperature condition, controlling the second control valve to be opened at a first flow opening smaller than a maximum opening;
controlling to close the second control valve when the water temperature in the water storage device meets the first water temperature condition;
wherein the first water temperature condition comprises a water temperature in the water storage device being less than a first set water temperature; the difference condition comprises that the temperature difference is smaller than a set temperature difference threshold; the temperature condition comprises that the temperature of the indoor coil is less than a set temperature threshold;
wherein said adjusting the control valve to a second flow opening based on temperature decay information comprises:
when a first temperature attenuation value of the indoor coil temperature within a set time meets a preset attenuation condition and the water temperature in the water storage device does not meet the first water temperature condition, controlling and increasing the opening degree of the second control valve; or,
when a second temperature attenuation value of the temperature difference value in a set time length meets a preset attenuation condition and the water temperature in the water storage device does not meet the first water temperature condition, controlling and increasing the opening degree of the second control valve;
wherein the preset attenuation condition comprises that the temperature or the temperature difference is greater than or equal to a preset attenuation threshold value; the adjustment mode of increasing the opening degree of the second control valve adopts a step-type adjustment mode.
7. The air conditioner is characterized by comprising an indoor unit, an outdoor unit and an outdoor defrosting device, wherein the outdoor defrosting device comprises an exhaust branch, a water storage device, a spraying device and a control valve; the two ends of the exhaust branch are respectively connected in parallel with an exhaust pipeline of a compressor of the outdoor unit and a liquid outlet pipeline of an indoor heat exchanger of the indoor unit in a heating mode, and the exhaust branch is connected with the water storage device and is set to heat water stored in the water storage device by utilizing the exhaust heat of the compressor; the spraying device is communicated with the water storage device and is arranged to controllably spray water in the water storage device to the outdoor heat exchanger of the outdoor unit; the control valve comprises a first control valve arranged in the exhaust pipeline and a second control valve arranged in the exhaust branch; the air conditioner further comprises a control device according to claim 6.
CN201910492355.XA 2019-06-06 2019-06-06 Control method and control device for defrosting of air conditioner and air conditioner Active CN112050364B (en)

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Citations (7)

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CN1796885A (en) * 2004-12-24 2006-07-05 珠海格力电器股份有限公司 Defroster control method for air-conditionner
KR20110139906A (en) * 2010-06-24 2011-12-30 (주)새한이엔브이 Heat pump style constant temperature humidifier
CN102116537A (en) * 2011-03-29 2011-07-06 清华大学 Solution spray type heat pump set
CN102141279A (en) * 2011-03-29 2011-08-03 广州市华德工业有限公司 Solution-spraying type air-conditioner heat pump unit
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