CN112361533A - Defrosting method for air conditioner with upper air outlet and lower air outlet - Google Patents
Defrosting method for air conditioner with upper air outlet and lower air outlet Download PDFInfo
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- CN112361533A CN112361533A CN202011085183.3A CN202011085183A CN112361533A CN 112361533 A CN112361533 A CN 112361533A CN 202011085183 A CN202011085183 A CN 202011085183A CN 112361533 A CN112361533 A CN 112361533A
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
- F24F11/77—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity by controlling the speed of ventilators
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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Abstract
The invention discloses a defrosting method of an air conditioner with upper air outlet and lower air outlet, relates to the technical field of air conditioners, and solves the technical problems that in the prior art, the air conditioning defrosting method is low in heat exchange efficiency of the whole machine and poor in defrosting effect. According to the defrosting method of the air conditioner with the upper air outlet and the lower air outlet, the indoor environment temperature T is obtained, the T is compared with the set temperature, and the defrosting mode is selected based on the comparison result, wherein the defrosting mode comprises a first defrosting mode, a second defrosting mode and a third defrosting mode, when the air conditioner with the upper air outlet and the lower air outlet is in the first defrosting mode, the second defrosting mode or the third defrosting mode, a first indoor fan of the air conditioner with the upper air outlet and the lower air outlet runs, the air outlet direction is the air outlet of an upper air duct, and the refrigerant flow of the upper path of an evaporator and the refrigerant flow of the lower path of the evaporator are adjusted based on the comparison result of the T. According to the defrosting method, the first indoor fan of the air conditioner is operated, and the air outlet direction is the air outlet direction of the upper air duct, so that the heat exchange efficiency of the whole machine can be improved, and the defrosting effect of the air conditioner can be improved.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a defrosting method of an air conditioner with upper and lower air outlets.
Background
When the air conditioning system is operated in heating in winter, the outdoor heat exchanger can be frosted. As the amount of frost increases, the heating capacity of the air conditioning system decreases significantly, and the comfort in the room decreases, so that it is necessary to defrost the air conditioning system. The defrosting principle of the existing air conditioning system is as follows: the air conditioning system is switched from heating operation to cooling operation, and the outdoor unit blows hot air in the cooling process, so that the temperature of a condenser on the outdoor side is increased to be above 0 ℃, and the defrosting purpose is achieved. However, in the existing defrosting scheme of the air conditioner, in order to prevent cold air blown out by the indoor unit from entering the room during the cooling process, the indoor side fan needs to be stopped. The indoor side fan stops running, which leads to low heat exchange efficiency of the whole machine, thereby leading to poor defrosting effect.
Chinese patent (application No. 202010353780.3) discloses a control method of an air conditioning system and an air conditioning system, and in an embodiment of the patent, defrosting is proposed as follows: when the indoor temperature is higher than the set value, the indoor fan operates at the minimum rotating speed, and simultaneously the electric auxiliary heat is started. However, the embodiment proposed in this patent lacks reliability for two reasons: (1) in the defrosting stage, in order to ensure that defrosting is clean, the compressor usually runs at a high frequency, which means that the power of the whole machine is very high, and under the background, the power of the whole machine is increased by one step when electric auxiliary heat is turned on, so that the potential safety hazard of electricity exists; (2) the defrosting stage, the indoor side of air conditioning system is for refrigerating the operation, and in the several minutes of defrosting, a large amount of condensation water can be gathered to the evaporimeter, and opens the electricity and assist the heat under the condition that the evaporimeter gathers a large amount of condensation water, can lead to the phenomenon that has the water smoke to blow out along with the wind, more probably has the hidden danger of interior machine flowing water.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a defrosting method capable of improving a defrosting effect.
Disclosure of Invention
The invention provides a defrosting method of an air conditioner with upper and lower air outlets, and solves the technical problems of low heat exchange efficiency of the whole machine and poor defrosting effect of a hollow defrosting method in the prior art. The various technical effects that can be produced by the preferred technical solution of the present invention are described in detail below.
In order to achieve the purpose, the invention provides the following technical scheme:
the invention relates to a defrosting method of an upper and lower air outlet air conditioner, which is characterized in that an indoor environment temperature T is obtained, the T is compared with a set temperature, and a defrosting mode is selected based on a comparison result, wherein the defrosting mode comprises a first defrosting mode, a second defrosting mode and a third defrosting mode, when the upper and lower air outlet air conditioner is in the first defrosting mode, the second defrosting mode or the third defrosting mode, a first indoor fan of the upper and lower air outlet air conditioner runs, the air outlet direction is the air outlet direction of an upper air duct, and the refrigerant flow of an upper path of an evaporator and the refrigerant flow of a lower path of the evaporator are adjusted based on the comparison result of the T and the set temperature.
According to a preferred embodiment, when T > 24 ℃, the upper and lower air outlet air conditioners are in a first defrosting mode; t is more than 23 ℃ and less than or equal to 24 ℃, and the upper air outlet air conditioner and the lower air outlet air conditioner are in a second defrosting mode; t is more than 22 ℃ and less than or equal to 23 ℃, and the upper and lower air outlet air conditioner is in a third defrosting mode.
According to a preferred embodiment, when the upper and lower outlet air conditioners are in the first defrosting mode, the refrigerant quantity of the evaporator upper path and the refrigerant quantity of the evaporator lower path are equivalent.
According to a preferred embodiment, when the upper and lower outlet air conditioners are in the second defrosting mode, the refrigerant flow of the evaporator upper path is the maximum value, and the refrigerant flow of the evaporator lower path is 0.
According to a preferred embodiment, when the up-down outlet air conditioner is in the third defrosting mode, the refrigerant flow rate of the evaporator up path is 0, and the refrigerant flow rate of the evaporator down path is the maximum value.
According to a preferred embodiment, when the upper and lower outlet air conditioner is in the first defrosting mode, the second defrosting mode or the third defrosting mode, the first indoor fan operates according to a medium wind gear, a medium and low wind gear, a low wind gear or a mute gear.
According to a preferred embodiment, when the upper and lower air outlet air conditioner is in a first defrosting mode, a second defrosting mode or a third defrosting mode, the first upper air duct baffle and the second upper air duct baffle are in a closed state, so that the upper air duct forms a diffusion angle and air is blown out through the upper air duct; and the first lower air duct baffle and the second lower air duct baffle are in an open state.
According to a preferred embodiment, the upper and lower outlet air conditioner further includes a fourth defrosting mode, and when the upper and lower outlet air conditioner is in the fourth defrosting mode, the first indoor fan stops operating.
According to a preferred embodiment, T is less than or equal to 22 ℃, and the upper air outlet and lower air outlet air conditioner is in a fourth defrosting mode.
According to a preferred embodiment, when the upper and lower air outlet air conditioner is in the fourth defrosting mode, the first upper air duct baffle and the second upper air duct baffle are in an open state, and the first lower air duct baffle and the second lower air duct baffle are in a closed state; or the first upper air duct baffle and the second upper air duct baffle are in a closed state, and the first lower air duct baffle and the second lower air duct baffle are in an open state.
The defrosting method of the air conditioner with upper and lower air outlets provided by the invention at least has the following beneficial technical effects:
according to the defrosting method of the air conditioner with the upper air outlet and the lower air outlet, the indoor environment temperature T is obtained, the T is compared with the set temperature, the defrosting mode is selected based on the comparison result, when the air conditioner with the upper air outlet and the lower air outlet is in the first defrosting mode, the second defrosting mode or the third defrosting mode, the first indoor fan of the air conditioner with the upper air outlet and the lower air outlet of the evaporator are operated, the air outlet direction is the air outlet direction of the upper air outlet, the air outlet direction of the upper air outlet is mainly located at the upper part of the room, and the temperature of the lower part of the room is hardly influenced. On the other hand, the refrigerant flow of the evaporator upper path and the evaporator lower path is adjusted based on the comparison result of the T and the set temperature, so that the heat exchange quantity of the whole machine can be maximized on the premise of ensuring the comfort of indoor heating body feeling, and the defrosting effect of the air conditioner is optimally improved.
The defrosting method of the air conditioner with the upper air outlet and the lower air outlet solves the technical problems of low heat exchange efficiency of the whole machine and poor defrosting effect in the prior air conditioning defrosting method by operating the first indoor fan of the air conditioner and enabling the air outlet direction to be the air outlet direction of the upper air duct.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a preferred embodiment of different defrosting mode judgment criteria according to the present invention;
FIG. 2 is a schematic view of the structure of the evaporator, the first throughflow and the second throughflow of the present invention;
FIG. 3 is a schematic side view of an evaporator, a first throughflow and a second throughflow of the present invention;
FIG. 4 is a schematic view of a preferred embodiment of the evaporator shunt device of the present invention;
FIG. 5 is a schematic view of the position of the air duct baffle when the air exits the upper air duct according to the present invention;
FIG. 6 is a schematic view of the position of the air duct baffle when the lower air duct is out of the air duct according to the present invention.
In the figure: 1. an evaporator; 11. a flow divider valve; 12. an evaporator is connected to the road; 13. an evaporator is arranged in a lower path; 2. a first through flow; 3. a second cross flow; 41. a first upper duct baffle; 42. a second upper duct baffle; 51. a first lower duct baffle; 52. and a second lower duct baffle.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The defrosting method of the air conditioner with upper and lower air outlets of the invention is described in detail below with reference to the accompanying drawings 1 to 6 and the embodiments 1 and 2 of the specification.
Example 1
The present embodiment describes the structure of the air conditioner with up and down air outlets in detail.
The air-out air conditioner includes wind channel and lower wind channel about this embodiment. As shown in fig. 2 or 3, the evaporator 1 of the air conditioner with upper and lower outlets of the present embodiment is provided with a first through flow 2 and a second through flow 3 in the up and down direction. The first through-flow 2 can also be called an upper through-flow fan blade or an upper through-flow fan blade, and the second through-flow 3 can also be called a lower through-flow fan blade or a lower through-flow fan blade. Preferably, the up-down air-out air conditioner further includes a first indoor fan for controlling the first cross flow 2 and a second indoor fan for controlling the second cross flow 3. When the upper and lower air outlet air conditioners are in a first defrosting mode, a second defrosting mode or a third defrosting mode, the first indoor fan operates, and cold air can flow out from the upper air duct; the second indoor fan stops and the lower air duct does not output air. When the upper air outlet air conditioner and the lower air outlet air conditioner are in the fourth defrosting mode, the first indoor fan and the second indoor fan stop, and the upper air duct and the lower air duct do not exhaust air.
The present embodiment mainly describes the structural difference between the upper and lower air outlet air conditioners and the common air conditioner. The air outlet of the existing air conditioner is a fixed position, and air supply in different areas is realized by adjusting the angle of the air deflector. However, even if the air deflector is turned to the uppermost angle, the air outlet of the air outlet cannot be prevented from blowing to people. Air-out air conditioner about this embodiment includes wind channel and lower wind channel, and wherein when going up the wind channel and going out wind, the wind that blows out is mainly located indoor top, and in indoor human activity range, can not have wind and blow. Therefore, in the defrosting stage, cold air of the air conditioner is blown out through the upper air duct and cannot blow towards people, and therefore user experience cannot be influenced. Therefore, air conditioner with upper and lower air outlets of the embodiment provides possibility for opening of the first indoor fan in the defrosting stage.
According to a preferred embodiment, the evaporator 1 is provided with a flow dividing device. Fig. 4 shows a schematic view of an evaporator with flow control, and as shown in fig. 4, the evaporator 1 includes a flow dividing valve 11, an evaporator upper line 12 and an evaporator lower line 13, and the flow dividing valve 11 is used for controlling the refrigerant flow in the evaporator upper line 12 and the evaporator lower line 13. Preferably, the flow rate of the refrigerant in the evaporator upper line 12 is adjusted to be between 0 and the maximum value by adjusting the flow dividing valve 11 on the premise that the total flow rate of the refrigerant is constant. It can be known that when the refrigerant flow rate in the evaporator upper path 12 is 0, the refrigerant flow rate in the evaporator lower path 13 is the maximum value; when the refrigerant flow rate in the evaporator upper line 12 is the maximum value, the refrigerant flow rate in the evaporator lower line 13 is 0.
According to a preferred embodiment, the upper duct comprises a first upper duct baffle 41 and a second upper duct baffle 42, and the lower duct comprises a first lower duct baffle 51 and a second lower duct baffle 52. Preferably, the upper duct further includes a first motor for controlling the opening and closing of the first upper duct baffle 41 and the second upper duct baffle 42. The lower duct further includes a second motor for controlling the opening and closing of the first lower duct baffle 51 and the second lower duct baffle 52. Preferably, when the first upper duct baffle 41 and the second upper duct baffle 42 are in a closed state, the upper duct forms a diffusion angle, so that air outlet of the upper duct of the air conditioner can be realized; at this time, the first lower duct baffle 51 and the second lower duct baffle 52 are in an open state for intake of air, as shown in fig. 5. When the first lower air duct baffle 51 and the second lower air duct baffle 52 are in a closed state, the lower air duct forms a diffusion angle, so that air outlet of the lower air duct of the air conditioner can be realized; at this time, the first uptake damper 41 and the second uptake damper 42 are in an open state for intake of air, as shown in fig. 6.
Preferably, when the up-down outlet air conditioner is in the off state, the first and second upper duct baffles 41 and 42, and the first and second lower duct baffles 51 and 52 are in the closed state.
It can be known, the air conditioner of air-out still includes parts such as compressor, heat exchanger about this embodiment, and no longer the repeated description here, it can be the same with the corresponding part of air conditioner among the prior art.
The air conditioner of air-out about this embodiment, when going up the wind channel and going out wind, can realize that the air-out is not blowing indoor user, provides probably for opening of the first indoor fan of defrosting stage.
Example 2
This embodiment describes in detail a defrosting method of an air conditioner with upper and lower outlets based on embodiment 1. Without being limited thereto, the defrosting method of the embodiment may also be used in other air conditioners with upper and lower outlets in the prior art.
According to the defrosting method of the air conditioner with the upper air outlet and the lower air outlet, the indoor environment temperature T is obtained, the T is compared with the set temperature, and the defrosting mode is selected based on the comparison result. The defrosting mode comprises a first defrosting mode, a second defrosting mode and a third defrosting mode, when the upper air outlet air conditioner and the lower air outlet air conditioner are in the first defrosting mode, the second defrosting mode or the third defrosting mode, a first indoor fan of the upper air outlet air conditioner and the lower air outlet air conditioner run, the air outlet direction is the air outlet of an upper air channel, and the refrigerant flow of the evaporator upper path 12 and the evaporator lower path 13 is adjusted based on the comparison result of T and the set temperature. Preferably, when the air conditioner with the upper air outlet and the lower air outlet meets the defrosting condition, the indoor environment temperature T at the moment is recorded. More preferably, after the compressor is operated for 40min, the temperature of the outer pipe is detected to be less than 0 ℃, the indoor environment temperature T at the moment is recorded, and the defrosting program is started.
According to the defrosting method of the air conditioner with the upper air outlet and the lower air outlet, the air outlet direction of the air conditioner is the air outlet direction of the upper air duct, the air outlet direction of the upper air duct is mainly located at the upper indoor part, and the temperature of the lower indoor part is hardly influenced. On the other hand, the refrigerant flow of the evaporator upper path 12 and the evaporator lower path 13 is adjusted based on the comparison result of the T and the set temperature, so that the heat exchange quantity of the whole machine can be maximized on the premise of ensuring the comfort of indoor heating body feeling, and the defrosting effect of the air conditioner is optimally improved.
In the defrosting method of the air conditioner with the upper air outlet and the lower air outlet, the first indoor fan of the air conditioner is operated, and the air outlet direction is the air outlet direction of the upper air duct, so that the technical problems that the overall heat exchange efficiency is low and the defrosting effect is poor in the air conditioning defrosting method in the prior art are solved.
According to a preferred embodiment, the upper and lower outlet air conditioner further includes a fourth defrosting mode, and when the upper and lower outlet air conditioner is in the fourth defrosting mode, the first indoor fan stops operating.
Preferably, when T is more than 24 ℃, the air conditioner with upper and lower air outlets is in a first defrosting mode; t is more than 23 ℃ and less than or equal to 24 ℃, and the air conditioner with upper air outlet and lower air outlet is in a second defrosting mode; t is more than 22 ℃ and less than or equal to 23 ℃, and the air conditioner with upper air outlet and lower air outlet is in a third defrosting mode as shown in figure 1. Preferably, T is less than or equal to 22 ℃, and the air conditioner with upper and lower air outlets is in a fourth defrosting mode as shown in figure 1. The set temperature is not limited to 22 deg.C, 23 deg.C and 24 deg.C, and may be the remaining temperatures.
The defrosting method of the air conditioner with the upper air outlet and the lower air outlet is characterized in that different defrosting modes are selected based on the indoor temperature, so that the defrosting effect can be guaranteed, and the influence on the indoor comfort can be avoided. Specifically, in the defrosting method of the upper and lower air outlet air conditioner in the embodiment, when the upper and lower air outlet air conditioner is in the first defrosting mode, the second defrosting mode or the third defrosting mode, the first indoor fan is in the running state, so that the heat exchange efficiency of the whole air conditioner can be improved, and the defrosting effect of the air conditioner is improved; when air-out air conditioner was in the fourth mode of defrosting about, because indoor temperature has been lower, made first indoor fan bring to rest this moment, can avoid the cold wind that blows off to cause the indoor temperature to descend, reduces indoor travelling comfort, causes the poor technical problem of user experience.
Specifically, when T is more than 24 ℃, the air conditioner with upper and lower air outlets is in a first defrosting mode. In the first defrosting mode, the first indoor fan operates, the air outlet direction is the air outlet direction of the upper air duct, and at the moment, the flow divider valve 11 keeps default setting, that is, the refrigerant quantity of the evaporator upper path 12 is equivalent to that of the evaporator lower path 13. Because the heat exchange quantity of the air conditioner is in direct proportion to the heat exchange area, when the upper air-out air conditioner and the lower air-out air conditioner are in the first defrosting mode, the upper evaporator path 12 and the lower evaporator path 13 both participate in heat exchange, and the heat exchange area is the largest at the moment, so that the heat exchange quantity of the upper air-out air conditioner and the lower air-out air conditioner is the largest, and the defrosting effect at the outdoor side is the best. The first defrosting mode of the preferred technical scheme of the embodiment can also be called a powerful defrosting mode.
When air-out air conditioner was in first white mode from top to bottom, indoor temperature was high, and at the white stage of changing, even last wind channel goes out the air cooling and operates several minutes, can not cause the obvious fluctuation of indoor temperature yet, therefore can not influence user experience. By comparing the cloud pictures of the indoor temperature distribution after the upper and lower air outlet air conditioners are in the first defrosting mode and the first indoor fan is stopped to defrost, the indoor temperature distribution is basically consistent after the two defrosting modes in the area below 2m indoors; in the area with the size of more than 2m, the first defrosting mode is characterized in that the first indoor fan is in an operating state, air is discharged from the upper air duct, the temperature distribution of the area is lower than the temperature of the first indoor fan after defrosting is stopped, but the temperature difference between the first indoor fan and the first indoor fan is within 2 ℃, and a user cannot feel obvious change.
Specifically, T is more than 23 ℃ and less than or equal to 24 ℃, and the air conditioner with upper and lower air outlets is in a second defrosting mode. In the second defrosting mode, the first indoor fan operates, the air outlet direction is air outlet of the upper air duct, the flow divider valve 11 controls the refrigerant flow of the evaporator upper path 12 to be the maximum value, and the refrigerant flow of the evaporator lower path 13 is 0. When the upper air outlet air conditioner and the lower air outlet air conditioner are in the second defrosting mode, the evaporator upper path 12 participates in heat exchange, the heat exchange area is reduced at the moment, and the heat exchange amount is slightly lower than that in the first defrosting mode. The second defrosting mode of the preferred technical scheme of the embodiment can also be called an efficient defrosting mode.
According to the preferred technical scheme of the embodiment, when the upper and lower air-out air conditioners are in the second defrosting mode, the 12 refrigerant flow of the upper path of the evaporator is controlled to be the maximum value by the flow dividing valve 11, the 13 refrigerant flow of the lower path of the evaporator is 0, namely, when the upper and lower air-out air conditioners are in the second defrosting mode, only the 12 refrigerant flow of the upper path of the evaporator is involved in heat exchange, on one hand, the heat exchange area is reduced compared with the first defrosting mode, the rapid reduction of the indoor temperature caused by the blowing of large cold air can be avoided, so that the comfort of indoor heating body feeling can be ensured, on the other hand, the heat exchange quantity of the whole machine can be maximized, and the defrosting effect of the air conditioner is optimally improved (when the air is blown out.
Specifically, T is more than 22 ℃ and less than or equal to 23 ℃, and the air conditioner with upper and lower air outlets is in a third defrosting mode. In the third defrosting mode, the first indoor fan operates, the air outlet direction is the air outlet direction of the upper air duct, at the moment, the flow dividing valve 11 controls the refrigerant flow of the evaporator upper path 12 to be 0, and the refrigerant flow of the evaporator lower path 13 to be the maximum value. When the upper and lower air outlet air conditioners are in the third defrosting mode, the evaporator lower path 13 participates in heat exchange, and the heat exchange amount is slightly lower than that in the second defrosting mode. The third defrosting mode of the preferred technical scheme of the embodiment can also be called a secondary efficient defrosting mode.
The preferred technical scheme of this embodiment is when air conditioner is in the third defrosting mode from top to bottom, indoor temperature has been lower this moment, 12 refrigerant flows on the way are 0 for flow divider 11 control evaporimeter, 13 refrigerant flows on the way are the maximum value for the evaporimeter, when air conditioner is in the third defrosting mode from top to bottom promptly, only make 13 participation heat transfer on the way under the evaporimeter, on the one hand, the heat transfer area is compared in first defrosting mode and is reduced, participate in the heat transfer through keeping 13 on the way under the evaporimeter, can further avoid great cold volume cold wind to blow out and lead to indoor temperature sharply to descend, thereby can guarantee indoor heating body and feel the travelling comfort, on the other hand still can guarantee the heat transfer maximize of complete machine, the promotion air conditioner defrosting effect of optimization.
Specifically, T is less than or equal to 22 ℃, and the air conditioner with upper air outlet and lower air outlet is in a fourth defrosting mode. And under the fourth defrosting mode, the first indoor fan stops running. At this time, the evaporator upper line 12 and the evaporator lower line 13 pass only a small amount of refrigerant by pressure. When the upper air outlet air conditioner and the lower air outlet air conditioner are in the fourth defrosting mode, the evaporator upper path 12 and the evaporator lower path 13 do not participate in heat exchange, and the heat exchange amount is lower than that in the third defrosting mode. The fourth defrosting mode of the preferred technical scheme of the embodiment can also be called a conventional defrosting mode.
The preferred technical scheme of this embodiment is when air-out air conditioner is in the fourth mode of defrosting from top to bottom, and indoor temperature has been very low this moment, makes first indoor fan stop operation this moment, and evaporator upper run 12 and evaporator lower run 13 all do not participate in the heat transfer, and the cold wind that can avoid blowing off causes indoor temperature to descend, reduces indoor travelling comfort, causes the poor technical problem of user experience.
According to a preferred embodiment, when the upper and lower outlet air conditioner is in the first defrosting mode, the second defrosting mode or the third defrosting mode, the first indoor fan operates according to a medium wind gear, a medium and low wind gear, a low wind gear or a mute gear. Preferably, when the upper and lower air outlet air conditioners are in a first defrosting mode, a second defrosting mode or a third defrosting mode, the first indoor fan operates according to a medium wind gear. The preferred technical scheme of this embodiment is when air-out air conditioner is in first white mode, second white mode or third white mode from top to bottom, and first indoor fan moves according to well wind shelves, both can guarantee the heat transfer volume maximize of complete machine on the one hand, and the promotion air conditioner that optimizes changes the white effect, and on the other hand compares in high wind shelves, can avoid the cold wind volume that blows off too big to cause the indoor temperature to obviously descend again.
In the preferred technical scheme of the embodiment, the standards of the high wind gear, the medium wind gear, the low wind gear, the medium wind gear or the low wind gear or the mute gear are the same as those of the existing air conditioner, and the detailed description of the gears is omitted.
According to a preferred embodiment, when the up-down air outlet air conditioner is in the first defrosting mode, the second defrosting mode or the third defrosting mode, the first upper duct baffle 41 and the second upper duct baffle 42 are in a closed state, so that the upper duct forms a diffusion angle and the air is blown out through the upper duct; and the first lower duct shutter 51 and the second lower duct shutter 52 are in an open state. In the preferred technical scheme of this embodiment, when the up-and-down air-out air conditioner is in the first defrosting mode, the second defrosting mode or the third defrosting mode, the first upper duct baffle 41 and the second upper duct baffle 42 are in the closed state, so that air can be blown out through the upper duct, the blown air is mainly located above the room, and no air can be blown out within the range of motion of the indoor human body; and the first lower duct baffle 51 and the second lower duct baffle 52 are in the open state, so that the air intake effect can be increased.
According to a preferred embodiment, when the up-down outlet air conditioner is in the fourth defrosting mode, the first upper air duct baffle 41 and the second upper air duct baffle 42 are in an open state, and the first lower air duct baffle 51 and the second lower air duct baffle 52 are in a closed state; alternatively, the first upper duct flap 41 and the second upper duct flap 42 are in the closed state, and the first lower duct flap 51 and the second lower duct flap 52 are in the open state. In the preferred technical scheme of the embodiment, when the air conditioner with the upper air outlet and the lower air outlet is in the fourth defrosting mode, the first indoor fan stops running, and only one of the two baffles in the upper air duct and the lower air duct needs to be in a closed state, and the other baffle in the upper air duct and the lower air duct needs to be in an open state, so that air can enter from one of the upper air duct and the lower air duct and flow out from the other.
In the description of the present invention, it is to be noted that, unless otherwise specified, "a plurality" means two or more; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as appropriate to those of ordinary skill in the art.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. A defrosting method of an air conditioner with upper and lower air outlets is characterized in that indoor environment temperature T is obtained, T is compared with a set temperature, and a defrosting mode is selected based on a comparison result, wherein the defrosting mode comprises a first defrosting mode, a second defrosting mode and a third defrosting mode,
when the upper and lower air outlet air conditioners are in a first defrosting mode, a second defrosting mode or a third defrosting mode, the first indoor fans of the upper and lower air outlet air conditioners operate, the air outlet direction is the air outlet direction of the upper air duct, and the refrigerant flow of the upper path of the evaporator and the refrigerant flow of the lower path of the evaporator are adjusted based on the comparison result of the T and the set temperature.
2. The defrosting method of an upper and lower air outlet air conditioner according to claim 1, wherein when T > 24 ℃, the upper and lower air outlet air conditioner is in a first defrosting mode;
t is more than 23 ℃ and less than or equal to 24 ℃, and the upper air outlet air conditioner and the lower air outlet air conditioner are in a second defrosting mode;
t is more than 22 ℃ and less than or equal to 23 ℃, and the upper and lower air outlet air conditioner is in a third defrosting mode.
3. The defrosting method of an upper and lower outlet air conditioner according to claim 1, wherein when the upper and lower outlet air conditioner is in the first defrosting mode, the refrigerant amount in the upper evaporator path is equivalent to that in the lower evaporator path.
4. The defrosting method of an upper and lower outlet air conditioner according to claim 1, wherein when the upper and lower outlet air conditioner is in the second defrosting mode, the flow rate of the refrigerant in the upper path of the evaporator is the maximum value, and the flow rate of the refrigerant in the lower path of the evaporator is 0.
5. The defrosting method of an upper and lower outlet air conditioner according to claim 1, wherein when the upper and lower outlet air conditioner is in the third defrosting mode, the refrigerant flow rate of the evaporator upper path is 0, and the refrigerant flow rate of the evaporator lower path is the maximum.
6. The defrosting method of an upper and lower outlet air conditioner according to claim 1, wherein when the upper and lower outlet air conditioner is in the first defrosting mode, the second defrosting mode, or the third defrosting mode, the first indoor fan operates according to a medium wind gear, a medium and low wind gear, a low wind gear, or a silent gear.
7. The defrosting method of an upper and lower air outlet air conditioner according to claim 1, wherein when the upper and lower air outlet air conditioner is in a first defrosting mode, a second defrosting mode or a third defrosting mode, the first upper duct baffle and the second upper duct baffle are in a closed state, so that the upper duct forms a diffusion angle and air is blown out through the upper duct; and the first lower air duct baffle and the second lower air duct baffle are in an open state.
8. The defrosting method of an upper and lower outlet air conditioner according to any one of claims 1 to 7, wherein the upper and lower outlet air conditioner further includes a fourth defrosting mode, and when the upper and lower outlet air conditioner is in the fourth defrosting mode, the first indoor fan is stopped.
9. The defrosting method of an upper and lower air outlet air conditioner according to claim 8, wherein T is less than or equal to 22 ℃, and the upper and lower air outlet air conditioner is in a fourth defrosting mode.
10. The defrosting method of an upper and lower air outlet air conditioner according to claim 8, wherein when the upper and lower air outlet air conditioner is in the fourth defrosting mode, the first upper duct baffle and the second upper duct baffle are in an open state, and the first lower duct baffle and the second lower duct baffle are in a closed state;
or the first upper air duct baffle and the second upper air duct baffle are in a closed state, and the first lower air duct baffle and the second lower air duct baffle are in an open state.
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| CN112361533B (en) | 2022-04-22 |
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