CN112050357B - 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 PDFInfo
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- CN112050357B CN112050357B CN201910491604.3A CN201910491604A CN112050357B CN 112050357 B CN112050357 B CN 112050357B CN 201910491604 A CN201910491604 A CN 201910491604A CN 112050357 B CN112050357 B CN 112050357B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/41—Defrosting; Preventing freezing
- F24F11/42—Defrosting; Preventing freezing of outdoor units
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/65—Electronic processing for selecting an operating mode
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/89—Arrangement or mounting of control or safety devices
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- 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
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- 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
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/10—Temperature
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
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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 runs in a heating mode, acquiring the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device; and controlling the flow opening of the control valve according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device, so that the water temperature in the water storage device meets the defrosting water temperature condition. 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, so that the water temperature in the water storage device can meet the preset defrosting water temperature condition, the spraying 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 the fact that the water temperature is uncontrollable due to the influence of the outdoor environment in the related technology is effectively solved.
Description
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 gone 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 conditioners is more and more high, the problems existing in the use process of the air conditioners 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 to solve the problem of frosting and freezing of the outdoor unit of the air conditioner, for example, the outdoor unit is heated by a heating device provided in the outdoor unit, or an outdoor heat exchanger is defrosted and ice-melted by a high-temperature refrigerant discharged from a compressor, or the outdoor unit is defrosted by spraying a liquid such as an antifreeze solution or water.
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 nor is intended to identify key/critical elements or to delineate the scope of such embodiments but rather as 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 operates in a heating mode, acquiring the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device;
and controlling the flow opening of the control valve according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device, 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 obtaining module configured to obtain an indoor environment temperature, an indoor coil temperature and a water temperature in the water storage device when the air conditioner operates in a heating mode;
an opening control module configured to control a flow opening of the control valve according to the indoor ambient temperature, the indoor coil temperature, and the water temperature in the water storage device, such that the water temperature in the water storage device satisfies a defrost water temperature condition.
In some embodiments, the air conditioner includes an indoor unit, an outdoor unit, and an outdoor defrosting device including a discharge branch, a water storage device, a spray 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 pipe temperature and the water temperature of the water storage device, so that the water temperature in the water storage device can meet the preset defrosting water temperature condition, the spraying 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 the fact that the water temperature is uncontrollable due to 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 schematic structural diagram of a control device for defrosting of an air conditioner according to an embodiment of the present disclosure;
fig. 4 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 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 also provided with a power adjusting component, and the heating rate of the resistance wire component can be changed by changing the current or voltage supplied to the resistance wire component, 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 through fins and the like, and the heat generated by the compressor during working can be conducted to the heat conduction pipe, so that the heat of the heat conduction pipe is increased;
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 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 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 thermal storage apparatus may be connected in parallel, and a bypass control valve may be provided on each parallel pipe, so that the heating function of the solar heating apparatus and the thermal storage apparatus may be turned on or off by controlling the on/off state of each bypass 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 replenishing device comprises a water replenishing pipe, one end of the water replenishing pipe is communicated with the water storage cavity, the other end of the water replenishing pipe can be communicated with a household water source, a fourth water pump is arranged on the water replenishing 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 replenished.
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, acquiring indoor environment temperature, indoor coil temperature and water temperature in a water storage device when an air conditioner runs in a heating mode;
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; step S101, acquiring the real-time temperature of the coil of the indoor unit detected by the temperature sensor, and taking the real-time temperature as the temperature of the indoor coil;
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; step S101, acquiring the real-time temperature of the indoor environment detected by the temperature sensor, and taking the real-time temperature 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; step S101, acquiring the real-time temperature of the water detected by the temperature sensor and using the real-time temperature as the water temperature of the water storage device;
and S102, controlling the flow opening of the control valve according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device so as to enable the water temperature in the water storage device to meet the defrosting water temperature condition.
Optionally, the execution process of step S102 includes: calculating the temperature difference between the indoor coil temperature and the indoor environment temperature; and controlling the flow opening of the control valve according to the temperature difference, the temperature of the indoor coil and the water temperature in the water storage device.
Here, under the circumstance that the outdoor environment is relatively harsh, the outdoor low-temperature environment may simultaneously affect the air conditioner and the indoor environment where the air conditioner is located, for example, the outdoor low-temperature environment causes frost condensation on the outdoor heat exchanger, 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 also reduced; and although the outdoor environment and the outdoor environment are blocked 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 is 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 temperature difference between the indoor environment temperature and the indoor coil temperature is; conversely, the smaller the temperature difference between the indoor ambient temperature and the indoor coil temperature.
Therefore, the disclosed embodiment controls the 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 condition in the water storage device.
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 that the spraying device is started 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 at the moment, so that the heat carried by the sprayed 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, so that the water temperature in the water storage device can meet the preset defrosting water temperature condition, the spraying 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 the fact that the water temperature is uncontrollable due to 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, an embodiment of the present disclosure further provides a control method for defrosting an air conditioner, which includes the steps of:
s201, acquiring the indoor environment temperature, the indoor coil temperature and the water temperature in a water storage device when the air conditioner operates in a heating mode;
in the embodiment of the present disclosure, the specific implementation manner of step S201 is referred to the foregoing embodiments, and is not described herein again.
S202, judging whether the water temperature in the water storage device meets a first water temperature condition, if so, executing a step S206, and if not, executing a step S203;
optionally, the first water temperature condition comprises: the water temperature in the water storage device is larger than or equal to a first set water temperature.
Optionally, the value range of the first set water temperature is 13 ℃ to 17 ℃;
s203, calculating a temperature difference value between the indoor coil temperature and the indoor environment temperature;
here, for convenience of calculation, the absolute value of the temperature difference between the two is taken;
s204, judging whether the temperature difference value meets a temperature difference condition and whether the temperature of the indoor coil meets the temperature condition, if so, executing a step S205, and if not, ending the process;
optionally, the temperature difference condition comprises: the temperature difference value between the indoor coil temperature and the indoor environment temperature is smaller than the set temperature difference threshold value.
Optionally, the temperature conditions include: the indoor coil temperature is less than the set temperature threshold.
Here, when the temperature of the indoor coil meets the temperature condition, it indicates that the outdoor environmental condition has an adverse effect on the normal heating performance of the air conditioner, and the temperature of the indoor coil is so low that the indoor environmental temperature cannot be raised to the heating temperature desired by the user;
s205, controlling to open a second control valve; the flow is finished;
s206, controlling to close the second control valve; the flow ends.
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 pipe 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 great influence on the indoor environment temperature and the indoor coil pipe temperature, the air conditioner may trigger the execution of the defrosting mode, so that the second control valve is controlled to be opened to heat the water in the water storage device, so that the water can meet the water temperature requirement required by the defrosting mode; 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 winter severe cold climate is ensured.
In an alternative embodiment, the set temperature difference threshold of the temperature difference condition in step S204 and the set temperature threshold of the temperature condition are preset fixed values.
In yet another alternative embodiment, the set temperature difference threshold and/or the set temperature threshold in step S204 are 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 S204 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.
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 the water level data of the water stored in the water storage cavity, and thus the air conditioner can calculate the real-time water amount in the water storage cavity according to the height change of the stored water level data.
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 degree of frosting of the outdoor unit of the air conditioner.
In an optional embodiment, the estimation of the frosting degree of the outdoor unit can be implemented according to the current outdoor environment temperature, for example, when the outdoor environment temperature is lower, the outdoor environment is worse, the estimated frosting degree of the air conditioner is higher, and at this time, the spraying device needs more water to achieve a better defrosting effect, so that the set water threshold value can be set to a higher value, such as 1/2,2/3 and the like of the total water amount; 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 water supplement is a domestic water source, the temperature thereof 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. 3 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. 3, an embodiment of the present disclosure also provides a control device for defrosting of 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 3 includes:
a first obtaining module 31, configured to obtain an indoor environment temperature, an indoor coil temperature and a water temperature in the water storage device when the air conditioner operates in a heating mode;
an opening control module 32 configured to control the flow opening of the control valve based on the indoor ambient temperature, the indoor coil temperature, and the water temperature in the water storage device such that the water temperature in the water storage device meets the defrost water temperature condition.
In an alternative embodiment, the opening control module 32 is configured to:
calculating the temperature difference between the indoor coil temperature and the indoor environment temperature;
and controlling the flow opening of the control valve according to the temperature difference, the temperature of the indoor coil and the water temperature in the water storage device.
In an alternative embodiment, the opening control module 32 is configured to:
when the temperature difference value meets a preset temperature difference condition, the temperature of the indoor coil pipe meets a preset temperature condition, and the water temperature in the water storage device does not meet a first water temperature condition, controlling to open a second control valve;
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 first water temperature condition comprises: the water temperature in the water storage device is less than a first set water temperature.
In an alternative embodiment, the temperature differential condition comprises: the temperature difference between the indoor coil temperature and the indoor environment temperature 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 set temperature difference threshold value and/or the set temperature threshold value is determined according to the wind speed gear of an internal fan of the air conditioner.
In an optional embodiment, according to a preset incidence relation, a set 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 in the incidence relation is in a corresponding relation with the set temperature difference threshold value and/or the set temperature threshold value in a negative correlation.
In an alternative embodiment, the opening control module 32 is further configured to: and when the air conditioner enters the defrosting mode, controlling to close the second control valve.
In an optional embodiment, the control device 3 further comprises a water replenishing control module configured to control replenishing water to the water storage device when the water amount in the water storage device does not satisfy a preset 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, and 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, 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 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.
The embodiment of the present disclosure also provides a computer-readable storage medium storing computer-executable instructions configured to execute the control method for defrosting an air conditioner provided in the above embodiment.
Embodiments of the present disclosure also provide a computer program product comprising a computer program stored on a computer-readable storage medium, the computer program comprising 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. 4, where the electronic device includes:
at least one processor (processor)400, one processor 400 being illustrated in FIG. 4; and a memory (memory)401, and may also include a Communication Interface (Communication Interface)402 and a bus 403. The processor 400, the communication interface 402, and the memory 401 may communicate with each other through a bus 403. The communication interface 402 may be used for information transfer. The processor 400 may call logic instructions in the memory 401 to execute the control method for air conditioner defrosting provided in the above-described embodiment.
In addition, the logic instructions in the memory 401 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 401 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 400 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 401, that is, implements the control method for defrosting an air conditioner in the above-described method embodiment.
The memory 401 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 401 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 portable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk or an optical disk, and other 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 only and are not intended to limit 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 other like elements in a process, method or apparatus that comprises 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 technical 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 place, or may be distributed on a plurality of 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, acquiring the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device;
controlling the flow opening of the control valve according to the indoor environment temperature, the indoor coil temperature and the water temperature in the water storage device so as to enable the water temperature in the water storage device to meet the defrosting water temperature condition,
when the air conditioner enters a defrosting mode, controlling to close the second control valve;
wherein, according to indoor ambient temperature, indoor coil pipe temperature and the temperature of water in the water storage device, control the flow aperture of control valve includes:
calculating a temperature difference between the indoor coil temperature and the indoor ambient temperature;
controlling the flow opening of the control valve according to the temperature difference, the temperature of the indoor coil and the water temperature in the water storage device;
wherein, according to the temperature difference, indoor coil pipe temperature with the temperature of the water in the water storage device, control the flow aperture of control valve includes:
when the temperature difference value meets a temperature 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 to open the second control valve;
and when the water temperature in the water storage device meets the first water temperature condition, controlling to close the second control valve.
2. The control method according to claim 1,
the first water temperature condition comprises that the water temperature in the water storage device is less than a first set water temperature;
the temperature difference condition comprises that the temperature difference value between the indoor coil temperature and the indoor environment temperature is smaller than a set temperature difference threshold value;
the temperature condition includes that the indoor coil temperature is less than a set temperature threshold.
3. The control method according to claim 2, 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.
4. The control method according to claim 3, wherein the determining the set temperature difference threshold value and/or the set temperature threshold value according to the wind speed gear of the internal fan of the air conditioner comprises:
according to a preset incidence relation, matching to obtain the set temperature difference threshold value and/or the set temperature threshold value corresponding to the wind speed gear;
and the wind speed gear and the set temperature difference threshold value and/or the set temperature threshold value in the association relationship are in a negative correlation corresponding relationship.
5. The control method according to any one of claims 1 to 4, characterized by further comprising:
and when the water quantity in the water storage device does not meet the preset water quantity condition, controlling the water storage device to supplement water.
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 pipeline, 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 pipeline;
the control device includes:
the first acquisition module is configured to acquire an indoor environment temperature, an indoor coil temperature and a water temperature in the water storage device when the air conditioner operates in a heating mode;
an opening control module configured to control a flow opening of the control valve according to the indoor ambient temperature, the indoor coil temperature and the water temperature in the water storage device so that the water temperature in the water storage device meets a defrosting water temperature condition;
when the air conditioner enters a defrosting mode, controlling to close the second control valve;
wherein, according to indoor ambient temperature, indoor coil pipe temperature and the temperature of water in the water storage device, control the flow aperture of control valve includes:
calculating a temperature difference between the indoor coil temperature and the indoor ambient temperature;
controlling the flow opening of the control valve according to the temperature difference, the temperature of the indoor coil and the water temperature in the water storage device;
wherein, according to the temperature difference, indoor coil pipe temperature with the temperature in the water storage device, control the flow aperture of control valve includes:
when the temperature difference value meets a temperature 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 to open the second control valve;
and when the water temperature in the water storage device meets the first water temperature condition, controlling to close the second control valve.
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, the exhaust branch is connected with the water storage device and is set to heat water stored in the water storage device by utilizing 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.
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| JP6493370B2 (en) * | 2016-01-25 | 2019-04-03 | 株式会社デンソー | Heat pump system |
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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 |
| 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 |
| CN103574860A (en) * | 2012-07-30 | 2014-02-12 | 青岛海信日立空调系统有限公司 | Air conditioner defrosting circulation system |
| CN107702293A (en) * | 2017-09-20 | 2018-02-16 | 青岛海尔空调电子有限公司 | Air conditioner defrosting control method |
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Address after: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant before: QINGDAO HAIER JOINT STOCK Co.,Ltd. |
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Effective date of registration: 20220507 Address after: No.1 Gangcheng South Road, Jiangbei District, Chongqing, 400026 Applicant after: CHONGQING HAIER AIR-CONDITIONER Co.,Ltd. Applicant after: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant after: Haier Zhijia Co.,Ltd. Address before: 266101 Haier Industrial Park, 1 Haier Road, Laoshan District, Shandong, Qingdao Applicant before: QINGDAO HAIER AIR CONDITIONER GENERAL Corp.,Ltd. Applicant before: Haier Zhijia Co.,Ltd. |
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