CN220750240U - Air conditioner - Google Patents
Air conditioner Download PDFInfo
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- CN220750240U CN220750240U CN202322235126.4U CN202322235126U CN220750240U CN 220750240 U CN220750240 U CN 220750240U CN 202322235126 U CN202322235126 U CN 202322235126U CN 220750240 U CN220750240 U CN 220750240U
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- 238000010438 heat treatment Methods 0.000 claims abstract description 60
- 238000005485 electric heating Methods 0.000 claims description 35
- 230000008929 regeneration Effects 0.000 claims description 23
- 238000011069 regeneration method Methods 0.000 claims description 23
- 238000001179 sorption measurement Methods 0.000 claims description 16
- 239000002250 absorbent Substances 0.000 claims description 2
- 230000002745 absorbent Effects 0.000 claims description 2
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 230000001965 increasing effect Effects 0.000 description 60
- 239000003507 refrigerant Substances 0.000 description 48
- 238000000034 method Methods 0.000 description 37
- 230000008569 process Effects 0.000 description 30
- 238000007791 dehumidification Methods 0.000 description 26
- 230000008859 change Effects 0.000 description 19
- 238000004891 communication Methods 0.000 description 16
- 239000007788 liquid Substances 0.000 description 14
- 238000001816 cooling Methods 0.000 description 13
- 238000005192 partition Methods 0.000 description 13
- 230000002708 enhancing effect Effects 0.000 description 12
- 230000007613 environmental effect Effects 0.000 description 12
- 230000003014 reinforcing effect Effects 0.000 description 12
- 238000001514 detection method Methods 0.000 description 11
- 230000000694 effects Effects 0.000 description 8
- 238000005057 refrigeration Methods 0.000 description 8
- 230000002787 reinforcement Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000010257 thawing Methods 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 238000012937 correction Methods 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 230000017525 heat dissipation Effects 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 238000005728 strengthening Methods 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000003463 adsorbent Substances 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000010267 cellular communication Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 229940075875 delta d3 Drugs 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000001172 regenerating effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
The application discloses an air conditioner belongs to air treatment technical field. The air conditioner comprises: an outdoor unit; the outdoor unit includes: a first air duct is arranged in the shell; the outdoor heat exchanger is arranged in the first air duct; the outdoor fan is used for driving outdoor air in the first air duct to flow; the shell is also internally provided with a second air channel, one end of the second air channel is communicated with the outside of the room, and the other end of the second air channel is provided with a fresh air outlet which is connected with a fresh air pipe; the rotating wheel is rotatably connected in the shell and is provided with a first part positioned in the first air duct and a second part positioned in the second air duct; the heating device is arranged in the second air duct and is used for heating fresh air in the second air duct; in the air conditioning operation, the outdoor heat exchanger is used as an evaporator, and the outdoor air is ventilated by the rotor, so that the outdoor air is absorbed by the rotor and then flows to the outdoor heat exchanger. The air conditioner avoids frosting of the outdoor heat exchanger.
Description
Technical Field
The application relates to the technical field of air treatment, in particular to an air conditioner.
Background
An air conditioner is a device that controls temperature and humidity suitable for human activities using a refrigeration cycle. When the air conditioner performs a heating mode in winter, the outdoor heat exchanger serves as an evaporator, and when the evaporation temperature is lower than 0 ℃, the surface of the outdoor heat exchanger is easily frosted.
A common defrost mode in the prior art is defrosting by reversing the refrigeration system.
The defrosting mode has long preparation time, absorbs heat from the room during defrosting, and the temperature of the air outlet rises slowly after defrosting, so that the indoor temperature fluctuation is serious, and the comfort of a user is influenced.
Disclosure of Invention
The application provides an air conditioner, utilizes the runner to dehumidify the outside air and then passes through the outdoor heat exchanger, has avoided outdoor heat exchanger frosting.
In one aspect of the present application, an air conditioner includes: an outdoor unit; the outdoor unit includes: the shell is internally provided with a first air duct, and two ends of the first air duct are respectively communicated with the outside; the outdoor heat exchanger is arranged in the first air duct and is used for exchanging heat with outdoor air in the first air duct; the outdoor fan is used for driving outdoor air in the first air duct to flow; the shell is internally provided with a second air channel, one end of the second air channel is communicated with the outside of the room, and the other end of the second air channel is provided with a fresh air outlet which is connected with a fresh air pipe and used for feeding fresh air into the room; the rotating wheel is rotatably connected in the shell and is provided with a first part positioned in the first air duct and a second part positioned in the second air duct; the heating device is arranged in the second air duct and is used for heating fresh air in the second air duct; when the air conditioner is in thermal operation, the outdoor heat exchanger is used as an evaporator, the first part of the rotating wheel is an adsorption zone, the second part of the rotating wheel is a regeneration zone, and outdoor wind is ventilated in the adsorption zone, so that the outdoor wind is absorbed by the adsorption zone and then flows to the outdoor heat exchanger; the fresh air heated by the heating device is ventilated in the regeneration zone, so that the moisture absorbed by the rotating wheel is separated.
In some embodiments, the heating device is a fresh air heat exchanger; when the outdoor heat exchanger is used as an evaporator, the fresh air heat exchanger is used as a condenser; when the outdoor heat exchanger is used as a condenser, the fresh air heat exchanger is used as an evaporator.
In some embodiments, further comprising: the compressor, the four-way valve and the second stop valve; a first electromagnetic valve is connected in series between the exhaust end of the compressor and a D pipe of the four-way valve, and an E pipe of the four-way valve is connected in series with a second electromagnetic valve and then is connected to a second stop valve; the switching valve further comprises a first interface, a second interface, a third interface and a fourth interface; the exhaust end of the compressor is connected to a first interface of the switching valve, a second interface of the switching valve is connected to the input end of the fresh air heat exchanger, a third interface of the switching valve is connected between the second electromagnetic valve and the second stop valve, and a fourth interface of the switching valve is blocked; the output end of the fresh air heat exchanger is connected with the D pipe of the four-way valve to form a first branch, the output end of the fresh air heat exchanger is connected with the suction end of the compressor to form a second branch, the first branch is connected with a third electromagnetic valve in series, and the second branch is connected with a fourth electromagnetic valve in series.
In some embodiments, the outdoor unit further comprises: the fresh air fan is arranged in the second air channel and used for driving fresh air in the second air channel to flow to the fresh air pipe.
In some embodiments, the space of the housing is divided into a fan cavity and a press cavity; the first air channel is positioned in the fan cavity, and the second air channel is positioned at one side of the fan cavity, which is close to the press cavity.
In some embodiments, the rotor is positioned on a windward side of the outdoor heat exchanger when the outdoor fan rotates in a first direction; the outdoor fan is positioned at an air outlet side of the outdoor heat exchanger when rotated in a second direction opposite to the first direction so that the outdoor air heated by the outdoor heat exchanger is blown toward the wheel when the air conditioner is operated in a cooling mode.
In some embodiments, the outdoor fan is located on a side of the outdoor heat exchanger remote from the rotor, or the outdoor fan is located between the rotor and the outdoor heat exchanger.
In some embodiments, the heating device comprises a fresh air heat exchanger and an electrical heating device; the electric heating device is positioned between the fresh air heat exchanger and the rotating wheel.
In some embodiments, the second portion is smaller in volume than the first portion.
In another aspect of the present application, an air conditioner includes: an outdoor unit; the outdoor unit includes: a first air duct is arranged in the shell; the outdoor heat exchanger is arranged in the first air duct and is used for exchanging heat with outdoor air in the first air duct; the outdoor fan is used for driving outdoor wind to flow; wherein, a second air duct is also arranged in the shell; the heating device is arranged in the second air duct and is used for heating air in the second air duct when the air conditioner heats; the rotating wheel is rotatably connected in the shell and is provided with a first part positioned in the first air duct and a second part positioned in the second air duct; when the air conditioner is in heating operation, the first part is positioned on the windward side of the outdoor heat exchanger and used for absorbing moisture in outdoor wind, and the second part is positioned on the air outlet side of the heating device and used for receiving air heated by the heating device so as to regenerate the absorbent of the rotating wheel.
Drawings
FIG. 1 illustrates a schematic diagram of an air conditioner according to some embodiments;
fig. 2 illustrates an interior overhead view of an outdoor unit of an air conditioner according to some embodiments;
fig. 3 illustrates an interior plan view of an outdoor unit of an air conditioner according to other embodiments;
fig. 4 illustrates an exploded view of an outdoor unit of an air conditioner according to some embodiments;
FIG. 5 illustrates a schematic diagram of a refrigerant circuit in which fresh air is not dehumidified in a cooling mode of an air conditioner according to some embodiments;
FIG. 6 illustrates a schematic diagram of a refrigerant circuit for fresh air dehumidification of an air conditioner in a cooling mode in accordance with some embodiments;
FIG. 7 illustrates a schematic diagram of a refrigerant circuit with fresh air not humidified in a heating mode of an air conditioner according to some embodiments;
FIG. 8 illustrates a schematic diagram of a refrigerant circuit for fresh air humidification in a heating mode of an air conditioner according to some embodiments;
fig. 9 illustrates a control signal flow block diagram of an air conditioner according to some embodiments.
In the above figures: in the above figures, 100, an outdoor unit; 1. a housing; 10. a partition plate; 11. a fan cavity; 12. a press cavity; 13. an outdoor inlet; 14. an outdoor outlet; 15. a first air duct; 16. a second air duct; 17. a first separator; 18. a second separator; 3. an outdoor fan; 5. a fresh air module; 51. fresh air shell; 511. a fresh air inlet; 512. a fresh air outlet; 52. fresh air blower; 6. a rotating wheel; 61. a first portion; 62. a second portion; 7. a heating device; 71. a fresh air heat exchanger; 72. an electric heating device; 111. a compressor; 112. an outdoor heat exchanger; 113. a four-way valve; 114. an outdoor expansion valve; 1151. a first stop valve; 1152. a second shut-off valve; 1161. a first electromagnetic valve; 1162. a second electromagnetic valve; 1163. a third electromagnetic valve; 1164. a fourth electromagnetic valve; 117. a switching valve; 200. an indoor unit; 210. an indoor unit main body; 211. an indoor unit suction inlet; 212. an indoor unit exhaust port; 213. fresh air supply port; 300. a controller; 310. a memory; 320. a communication module; 330. fresh air humidity detection device; 340. an indoor humidity detection device; 350. an outdoor temperature and humidity detection device; 360. a coil temperature detection device; 400. and a new air pipe.
Detailed Description
For purposes of clarity and implementation of the present application, the following description will make clear and complete descriptions of exemplary implementations of the present application with reference to the accompanying drawings in which exemplary implementations of the present application are illustrated, it being apparent that the exemplary implementations described are only some, but not all, of the examples of the present application.
In the description of the present application, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted", "connected" and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the terms in this application will be understood by those of ordinary skill in the art in a specific context.
Reference will now be made in detail to embodiments of the present application, examples of which are illustrated in the accompanying drawings.
Referring to fig. 1, an air conditioner according to an embodiment of the present application includes: an outdoor unit 100 located in an outdoor space for performing heat exchange between a refrigerant and outdoor air; and an indoor unit 200 located in the indoor space for performing heat exchange between the refrigerant and the indoor air.
Wherein the indoor unit 200 includes an indoor unit main body 210; an indoor unit suction port 211 provided at a top surface of the indoor unit body 210 for collecting indoor air to enter the indoor unit body 210; the indoor unit exhaust port 212 is provided at a position lower than the front of the indoor unit main body 210, for exhausting the heat-exchanged air. The above description is given by taking the indoor unit 200 as an example of a wall-mounted structure. In other embodiments, for example, the indoor unit 200 has a cabinet structure, and then the indoor unit suction port 211 is disposed at the rear of the indoor unit main body 210, and the indoor unit discharge port 212 is disposed at the front of the indoor unit main body 210.
Referring to fig. 2 to 4, the outdoor unit 100 includes a housing 1, forming an overall appearance of the outdoor unit 100.
The interior of the housing 1 is divided by a partition plate 10 into a fan chamber 11 and a press chamber 12. Typically, the fan chamber 11 and the press chamber 12 are arranged in a transverse arrangement.
An outdoor heat exchanger 112, an outdoor fan 3, and the like in the outdoor unit 100 are provided in the fan chamber 11, and a compressor 111, an outdoor expansion valve 114, and the like of the outdoor unit 100 are provided in the compressor chamber 12.
An outdoor inlet 13 and an outdoor outlet 14 are provided on a set of opposite side walls of the housing 1, respectively. The outdoor inlet 13 communicates with the fan chamber 11 and the outdoor atmosphere, and the outdoor outlet 14 communicates with the fan chamber 11 and the outdoor atmosphere.
The fan chamber 11 includes a first air duct 15 and a second air duct 16.
Both ends of the first air duct 15 are respectively communicated with the outdoor inlet 13 and the outdoor outlet 14, and the outdoor heat exchanger 112 and the outdoor fan 3 are both arranged in the first air duct 15. The outdoor fan 3 circulates the outdoor air between the first air duct 15 and the outdoor atmosphere, and the outdoor heat exchanger 112 is used to exchange heat with the outdoor air in the first air duct 15. The outdoor air enters the first duct 15 from the outdoor inlet 13, exchanges heat with the outdoor heat exchanger 112, and is then blown out of the room through the outdoor outlet 14.
One end of the second air duct 16 is communicated with the outdoor inlet 13, the other end of the second air duct 16 is provided with a fresh air outlet 512, the fresh air outlet 512 is connected with a fresh air pipe 400, and the fresh air pipe 400 extends indoors to realize the communication between the second air duct 16 and the indoor space.
The air conditioner may include a fresh air fan 52 for driving air in the second duct 16 to flow indoors. For convenience of description, the air in the first air duct 15 is also referred to as outdoor air, and the air in the second air duct 16 is also referred to as fresh air.
The fresh air fan 52 may be disposed within the second duct 16 such that fresh air in the outdoor atmosphere enters the second duct 16 from the outdoor inlet 13 and then enters the room along the fresh air duct 400.
The indoor end of the new air pipe 400 can directly send fresh air into the room; alternatively, in connection with fig. 1, the indoor end of the fresh air duct 400 may be connected to the indoor unit 200, and then fresh air is fed into the room through the fresh air feeding port 213 of the indoor unit 200.
In embodiments where the fresh air duct 400 supplies air through the indoor unit 200, the fresh air fan 52 may also be disposed within the indoor unit 200.
With continued reference to fig. 2 and 3, the outdoor unit 100 further includes a rotating wheel 6 for dehumidification. The rotor 6 is made of a hygroscopic material and comprises an adsorption zone and a regeneration zone, one of which is located in the first air duct 15 and the other in the second air duct 16.
When the temperature of the air passing through the rotating wheel 6 is relatively low, the part of the rotating wheel 6 is an adsorption area, so that moisture in the air can be adsorbed; when the temperature of the air passing through the rotating wheel 6 is relatively high, the part of the rotating wheel 6 is a regeneration zone, and the high-temperature air enables moisture in the regeneration zone to be separated, so that the adsorbent in the regeneration zone is regenerated.
The rotor 6 is rotatably connected within the housing 1 and located on the windward side of the outdoor heat exchanger 112, each portion of the rotor 6 constantly changing between adsorption and regeneration zones as the rotor 6 rotates.
It can be understood that when the outdoor air temperature in the first air duct 15 is higher and the fresh air temperature in the second air duct 16 is lower, the part of the rotating wheel 6 located in the first air duct 15 is a regeneration zone, and the part located in the second air duct 16 is an adsorption zone; when the outdoor air temperature in the first air duct 15 is relatively low and the fresh air temperature in the second air duct 16 is relatively high, the part of the rotating wheel 6 positioned in the first air duct 15 is an adsorption area, and the part positioned in the second air duct 16 is a regeneration area.
Referring to fig. 4, since the adsorption zone and the regeneration zone vary according to the temperature of the air in the air duct, a portion of the wheel 6 located in the first air duct 15 is referred to as a first portion 61 and a portion of the wheel 6 located in the second air duct 16 is referred to as a second portion 62 for convenience of description.
The area of the second portion 62 of the wheel 6 is smaller than the area of the first portion 61, and in particular the area of the second portion 62 may be arranged not to be larger than 1/3 of the area of the first portion 61.
Illustratively, the area of the second portion 62 occupies one quarter of the area of the rotating wheel 6, so that the first partition 17 is at a right angle to the portion near the axis of the rotating wheel 6, so that the shape of the second air duct 16 can be more regular as much as possible, and the appearance of the fresh air heat exchanger 71 adapted to the second air duct 16 is more regular, thereby reducing the manufacturing difficulty.
The outdoor heat exchanger 112 has a larger area to ensure heat exchange capability of the outdoor side, and thus the first air duct 15 has a larger area than the second air duct 16.
Referring to fig. 2 and 3, the outdoor unit 100 further includes a heating device 7, where the heating device 7 is disposed in the second air duct 16 and located on the windward side of the rotating wheel 6, and is used to heat the fresh air in the second air duct 16, so that the temperature of the fresh air increases, and thus, the moisture in the regeneration zone of the rotating wheel 6 is removed.
The heating means 7 may be a fresh air heat exchanger, an electric heating means or a combination of both. That is, in one embodiment, only the fresh air heat exchanger 71 is provided on the windward side of the wheel 6, and the fresh air heat exchanger 71 functions as a condenser when the air conditioner is in heating operation; in another embodiment, the windward side of the wheel 6 is provided with only an electric heating device 72, such as an electric heating wire or the like, and the electric heating device 72 is operated by energizing the electric heating device 72; in another embodiment, the windward side of the rotor 6 is provided with a fresh air heat exchanger 71 and an electrical heating device 72, wherein the electrical heating device 72 is located between the fresh air heat exchanger 71 and the rotor 6.
When the air conditioner performs a heating mode in winter, the outdoor heat exchanger 112 serves as an evaporator, and the surface of the evaporator is easily frosted, thereby affecting the heating capacity of the air conditioner.
According to the outdoor heat exchanger, the rotating wheel 6 is arranged on the windward side of the outdoor heat exchanger 112, so that outdoor wind is absorbed by the rotating wheel 6 and then flows to the outdoor heat exchanger 112, the air flowing to the outdoor heat exchanger 112 is guaranteed to be dry low-temperature air, and the problem that the outdoor heat exchanger 112 is prone to frosting in winter is avoided.
In other embodiments, the outlet end of the second air duct 16 may not be connected to the new air duct 400, and the outlet end of the second air duct 16 is also connected to the outside, and the outdoor air enters the second air duct 16 from the outdoor inlet 13, passes through the heating device 7 and the rotating wheel 6, and is recycled to the outside.
According to an embodiment of the present application, in the first air duct 15, the outdoor heat exchanger 112 may be located between the wheel 6 and the outdoor fan 3, or the outdoor fan 3 may be located between the wheel 6 and the outdoor heat exchanger 112.
Referring to fig. 2, the first partition 17 extends from the windward side edge of the second portion of the rotor 6 to the outdoor inlet 13, and the second partition 18 extends from the windward side edge of the second portion of the rotor 6 to the side wall of the outdoor outlet 14 in a direction away from the rotor 6, so that the first and second partitions 17 and 18 enclose the second air duct 16 with the top wall of the casing 1 and the partition plate 10.
The fresh air outlet 512 is located on the top wall of the housing 1; the second air duct 16 is removed from the fan chamber 11, and the remainder constitutes the first air duct 15.
In some embodiments of the present application, referring to fig. 3, the outdoor unit 100 includes a fresh air module 5, the fresh air module 5 includes a fresh air case 51 and a fresh air fan 52, and the fresh air fan 52 is disposed within the fresh air case 51.
The fresh air shell 51 is provided with a fresh air inlet 511 and a fresh air outlet 512, the fresh air inlet 511 faces the rotating wheel 6, and the fresh air outlet 512 faces upwards. Since the structure of the fresh air module 5 is suitable for the prior art, it will not be described in detail here.
The fresh air module 5 can be arranged at an upper position in the fan cavity 11 so as to facilitate the exposure of the fresh air outlet 512 from the top of the shell 1; the fresh air module 5 is again located closer to the partition plate 10, so that the second air duct 16 is located closer to the press chamber 12, and the length of the connection of the refrigerant pipe between the fresh air heat exchanger 71 and the compressor 111 can be reduced.
The first partition 17 extends from the windward side edge of the second part of the rotor 6 to the outdoor inlet 13, and the second partition 18 extends from the air outlet side edge of the second part of the rotor 6 to the fresh air inlet end of the fresh air module 5, so that the first partition 17 and the second partition 18 enclose a second air duct 16 with the top wall of the casing 1 and the partition plate 10.
In some embodiments, the outdoor inlet 13 may be provided in two spaced apart communication, one communicating with the first duct 15 as an inlet for outdoor air and the other communicating with the second duct 16 as an inlet for fresh air.
Referring to fig. 5 to 8, in a refrigerant circuit of an air conditioner, a compressor 111 compresses a refrigerant; the outdoor heat exchanger 112 performs heat exchange between the outdoor wind and the refrigerant; the four-way valve 113 selectively guides the refrigerant compressed by the compressor 111 to the outdoor heat exchanger 112 or the indoor unit 200 according to a heating mode or a cooling mode; the outdoor expansion valve 114 decompresses the refrigerant that is led to the outdoor heat exchanger 112 or flows out of the outdoor heat exchanger 112.
The compressor 111 receives external power to compress the low-pressure gaseous refrigerant to a high pressure.
The four-way valve 113 guides the refrigerant compressed in the compressor 111 to the outdoor heat exchanger 112 in the cooling mode, and guides the refrigerant compressed in the compressor 111 to the indoor unit 200 in the heating mode.
The outdoor heat exchanger 112 condenses the refrigerant compressed by the compressor 111 in the cooling mode, and evaporates the refrigerant decompressed by the indoor unit 200 in the heating mode.
Further, a first shut-off valve 1151 and a second shut-off valve 1152 are provided on the gas pipe and the liquid pipe between the outdoor unit 100 and the indoor unit 200, respectively. The first shut-off valve 1151 is located between the outdoor heat exchanger 112 and the indoor unit 200, and the second shut-off valve 1152 is located between the four-way valve 113 and the indoor unit 200.
Specifically, the output end of the compressor 111 is connected to the D pipe of the four-way valve 113, the C pipe of the four-way valve 113 is connected to one end of the outdoor heat exchanger 112, the other end of the outdoor heat exchanger 112 is connected in series with the first stop valve 1151 and then connected to one end of the indoor unit 200, the E pipe of the four-way valve 113 is connected in series with the second stop valve 1152 and then connected to the other end of the indoor unit 200, and the S pipe of the four-way valve 113 is connected to the input end of the compressor 111.
In some embodiments of the present application, the output end of the compressor 111 is connected in series with the first solenoid valve 1161 and then connected to the D pipe of the four-way valve 113, and the E pipe of the four-way valve 113 is connected in series with the second solenoid valve 1162 and then connected to the second stop valve 1152.
The outdoor unit 100 further includes a switching valve 117, and the switching valve 117 is also a four-way valve having four ports.
The output end of the compressor 111 is connected to a first port of the switching valve 117, a second port of the switching valve 117 is connected to an input end of the fresh air heat exchanger 71, a third port of the switching valve 117 is connected between the second solenoid valve 1162 and the second stop valve 1152, and a fourth port of the switching valve 117 is blocked.
The output end of the fresh air heat exchanger 71 is divided into two branches, a first branch is connected to a D pipe of the four-way valve 113, and a second branch is connected to the input end of the compressor 111. The first branch is connected in series with a third solenoid valve 1163 and the second branch is connected in series with a fourth solenoid valve 1164.
In other embodiments, the three-way valve may be replaced by the switching valve 117 described above, one port of the three-way valve is connected to the input of the fresh air heat exchanger 71, the two ports of the three-way valve are connected to the output of the compressor 111, and the three ports of the three-way valve are connected between the second solenoid valve 1162 and the second stop valve 1152.
The following describes the operation mode of the air conditioner in conjunction with the refrigerant circuit:
refrigeration mode
Working state 1: the fresh air function is not on and the fresh air fan 52 and the rotating wheel 6 do not work.
The states of the valves in the refrigerant circuit in this state are shown in table 1.
TABLE 1
The four-way valve 113 is in the OFF state: the pipe D is communicated with the pipe C, and the pipe E is communicated with the pipe S;
the switching valve 117 is in the ON state: the first interface is communicated with the second interface, and the third interface is communicated with the fourth interface.
Refrigerant circuit: referring to fig. 5, arrows in the drawing illustrate the flow direction of the refrigerant, the high-temperature and high-pressure refrigerant is discharged from the compressor 111 through the discharge pipe, passes through the first solenoid valve 1161, reaches the four-way valve 113, then reaches the outdoor heat exchanger 112 (as a condenser) to exchange heat with outdoor wind, turns into low-temperature and high-pressure liquid or gas-liquid two-phase refrigerant, then passes through the outdoor expansion valve 114 to throttle and reduce pressure to become low-temperature and low-pressure liquid refrigerant, then passes through the first stop valve 1151 to flow into the indoor unit 200, exchanges heat with indoor air in the indoor unit 200 to become low-temperature and low-pressure gas refrigerant, returns to the outdoor unit 100 through the second stop valve 1152, and returns to the air suction port of the compressor through the second solenoid valve 1162 and the four-way valve 113, thus completing one refrigeration cycle.
First wind channel: referring to fig. 2, the arrow above indicates the flow direction of the outdoor air, which passes through the rotating wheel 6 (not in operation) under the driving of the outdoor fan 3, and then passes through the outdoor heat exchanger 112, and at this time, the outdoor heat exchanger 112 acts as a condenser to dissipate heat to the outdoor air, and finally is discharged to the outside through the outdoor outlet 14, thereby completing the primary heat dissipation process of the outdoor heat exchanger 112.
Working state 2: the fresh air is started and dehumidification is not needed, the fresh air fan works, and the rotating wheel does not work.
The air flow in the refrigerant loop and the first air duct is the same as the working state 1 in the refrigeration mode, and the difference is that ventilation is arranged in the second air duct.
And a second air duct: referring to fig. 2, the arrow below indicates the flow direction of the fresh air, the fresh air passes through the fresh air heat exchanger 71 (not in operation) and then passes through the rotating wheel 6 (not in operation) under the driving of the fresh air fan 52, and then reaches the fresh air pipe 400 through the fresh air outlet 512 to be sent into a room, thereby completing the fresh air conveying process.
Working state 3: fresh air is started and dehumidification is needed, a fresh air fan works, and a rotating wheel works.
The states of the valves in the refrigerant circuit in this state are shown in table 2.
TABLE 2
The four-way valve 113 is in the OFF state: the pipe D is communicated with the pipe C, and the pipe E is communicated with the pipe S;
The switching valve 117 is in the OFF state: the first interface is communicated with the fourth interface, and the third interface is communicated with the second interface.
Refrigerant circuit: referring to fig. 6, arrows illustrate the flow direction of the refrigerant, the high-temperature and high-pressure refrigerant is discharged from the compressor 111 through the discharge pipe, passes through the first solenoid valve 1161, reaches the four-way valve 113, then reaches the outdoor heat exchanger 112 (as a condenser) to exchange heat with outdoor air, turns into a low-temperature and high-pressure liquid or gas-liquid two-phase refrigerant, then passes through the outdoor expansion valve 114 to throttle and decompress into a low-temperature and low-pressure liquid refrigerant, then passes through the first stop valve 1151 to flow into the indoor unit 200, exchanges heat with indoor air in the indoor unit 200 into a low-temperature and low-pressure gaseous refrigerant, returns to the outdoor unit 100 through the second stop valve 1152 to flow into the switching valve 117, flows to the fresh air heat exchanger 71 (as an evaporator) through the switching valve 117 to exchange heat with fresh air, and returns to the air suction port of the compressor through the fourth solenoid valve 1164, thus completing one refrigeration cycle.
First wind channel: referring to the arrow on fig. 2, the outdoor wind passes through the regeneration area of the rotating wheel 6 under the driving of the outdoor fan 3, regenerates the moisture in the rotating wheel 6, then passes through the outdoor heat exchanger 112, and the outdoor heat exchanger 112 is used as a condenser to dissipate heat to the outdoor wind, and finally is discharged to the outside from the outdoor outlet 14, thus completing the heat dissipation process of the outdoor heat exchanger 112.
And a second air duct: referring to the arrow below fig. 2, the fresh air is cooled by the fresh air fan 52 through the fresh air heat exchanger 71 (evaporator) to be changed into a low-temperature and high-humidity state, and then the moisture carried by the fresh air is absorbed in the rotating wheel through the absorption area of the rotating wheel 6, and then reaches the fresh air pipe 400 through the fresh air outlet 512 to be sent into a room, so that the fresh air cooling, dehumidifying and conveying process is completed once.
When the air conditioner introduces fresh air in a refrigerating mode, cooling and dehumidification of the fresh air can be achieved.
Heating mode
Working state 1: the fresh air is not started, and the fresh air fan 52 and the rotating wheel 6 do not work.
The states of the valves in the refrigerant circuit in this state are shown in table 3.
TABLE 3 Table 3
Refrigerant circuit: referring to fig. 7, arrows in the drawing illustrate the flow direction of the refrigerant, the high-temperature and high-pressure refrigerant is discharged from the compressor 111 through the discharge pipe, passes through the first solenoid valve 1161, reaches the four-way valve 113, passes through the second solenoid valve 1162 and the second stop valve 1152, reaches the indoor unit 200, exchanges heat with indoor air in the indoor unit 200, turns into low-temperature and high-pressure liquid or gas-liquid two-phase state refrigerant, returns to the outdoor unit 100 through the first stop valve 1151, turns into low-temperature and low-pressure liquid refrigerant through throttling and depressurization of the outdoor expansion valve 114, flows to the outdoor heat exchanger 112 (serving as an evaporator), exchanges heat with outdoor air in the outdoor heat exchanger 112 to become low-temperature and low-pressure gaseous refrigerant, and returns to the air suction port of the compressor through the four-way valve 113, thereby completing one heating cycle.
First wind channel: referring to the upper arrow in fig. 2, the outdoor wind passes through the rotating wheel 6 (not in operation) under the driving of the outdoor fan 3, then passes through the outdoor heat exchanger 112 (as an evaporator), is absorbed by the outdoor heat exchanger 112, and finally is discharged to the outside, thus completing the process of absorbing heat by the outdoor heat exchanger 112 once.
Working state 2: the fresh air is started, humidification is not needed, the fresh air fan 52 works, and the rotating wheel 6 does not work.
The air flow in the refrigerant loop and the first air channel is the same as the working state 1 in the heating mode, and the difference is that ventilation is arranged in the second air channel.
And a second air duct: referring to the lower arrow in fig. 2, the fresh air passes through the fresh air heat exchanger 71 (not in operation) and then passes through the rotating wheel 6 (not in operation) under the driving of the fresh air fan 52, and then reaches the fresh air pipe 400 through the fresh air outlet 512 to be sent into a room, so that the fresh air conveying process is completed once.
Working state 3: the fresh air is started, humidification is needed, the fresh air fan 52 works, and the rotating wheel 6 works.
The states of the valves in the refrigerant circuit in this state are shown in table 4.
TABLE 4 Table 4
Refrigerant circuit: referring to fig. 8, the high-temperature and high-pressure refrigerant is discharged from the compressor 111 through the discharge pipe, passes through the switching valve 117, reaches the fresh air heat exchanger 71 to exchange heat with fresh air, becomes a low-temperature and high-pressure gas-liquid two-phase refrigerant, flows into the indoor unit 200 through the third solenoid valve 1163, the four-way valve 113, the second solenoid valve 1162 and the second stop valve 1152, exchanges heat with indoor air in the indoor unit 200 to become a low-temperature and high-pressure liquid or gas-liquid two-phase refrigerant, returns to the outdoor unit 100 through the first stop valve 1151, becomes a low-temperature and low-pressure liquid refrigerant through the throttling and depressurization of the outdoor expansion valve 114, flows to the outdoor heat exchanger 112 (serving as an evaporator), exchanges heat with outdoor air in the outdoor heat exchanger 112 to become a low-temperature and low-pressure gas refrigerant, and returns to the air suction port of the compressor through the four-way valve 113, thereby completing one heating cycle.
First wind channel: referring to the upper arrow in fig. 2, the outdoor air enters the first air duct 15 from the outdoor inlet 13, passes through the adsorption area of the rotating wheel 6, and then passes through the outdoor heat exchanger 112 after the outdoor air has a certain temperature rise due to the reduction of the outdoor air, is absorbed by the outdoor heat exchanger 112, and is finally discharged to the outside to complete the process of absorbing heat by the outdoor heat exchanger 112 once.
Since the outdoor wind is dehumidified by the rotating wheel 6, the humidity is lowered, the temperature is raised, and the dew point temperature is lowered, so that the outdoor heat exchanger 112 is not easily frosted.
And a second air duct: referring to the lower arrow in fig. 2, fresh air enters the second air duct 16 from the outdoor inlet 13, is changed into a high-temperature low-humidity state through the fresh air heat exchanger 71, is separated from moisture in the fresh air through the regeneration zone of the rotating wheel 6, has a temperature increase and a temperature decrease, reaches the fresh air pipe 400 through the fresh air outlet 512, and is fed into a room to complete a fresh air heating, humidifying and conveying process.
Hereinafter, a signal flow between components included in the air conditioner will be described.
Referring to fig. 9, the air conditioner includes a controller 300, a memory 310, and a communication module 320.
The controller 300 is used to control the compressor 111, the valve, the outdoor fan 3, the wheel 6, and the fresh air fan 52 according to the operation mode, and to control the operation of the air conditioner based on the temperature and humidity information.
A memory 310 for storing programs and data related to the operation of the air conditioner; the memory 310 may be implemented by at least one of a nonvolatile memory such as a cache, a Read Only Memory (ROM), a Programmable ROM (PROM), an Erasable Programmable ROM (EPROM), and a flash memory, a volatile memory such as a Random Access Memory (RAM), or a storage medium such as a Hard Disk Drive (HDD) and a CD-ROM, but is not limited thereto.
A communication module 320 for implementing communication between the outdoor unit 100 and the indoor unit 200; for example, the information of the temperature and humidity detection of the outdoor unit 100 and the indoor unit 200 may be shared by the communication module 320.
The communication module 320 may be a wired communication or a wireless communication. The wireless communication may use at least one of fifth generation (5G) mobile communication, long Term Evolution (LTE), LTE-advanced (LTE-a), code Division Multiple Access (CDMA), wideband CDMA (WCDMA), universal Mobile Telecommunications System (UMTS), wireless broadband (WiBro), or global system for mobile communication (GSM), which is a cellular communication protocol; additionally, the wireless communication may include a local communication, which may include at least one of wireless fidelity (WiFi), bluetooth, or Near Field Communication (NFC); the wired communication may include at least one of Universal Serial Bus (USB), high Definition Multimedia Interface (HDMI), recommended standard 232 (RS-232), or Plain Old Telephone Service (POTS).
In some embodiments of the present application, when fresh air is introduced into a room, if the humidity of the fresh air is greatly different from the indoor humidity, the change of the indoor humidity may be caused, thereby affecting the experience of a user.
For example, when fresh air is introduced into a room, if the humidity of the fresh air is relatively high, the humidity of the room is increased, and the air conditioner is required to dehumidify the fresh air; if the humidity of the outdoor air is relatively low, the indoor humidity is reduced, and the air conditioner is required to humidify the fresh air.
Specifically, the controller 300 may control the air conditioner to perform enhanced dehumidification/humidification operations based on fresh air supply humidity and indoor humidity.
The air conditioner further includes a fresh air humidity detection device 330 and an indoor humidity detection device 340.
The fresh air humidity detecting device 330 may be disposed at the fresh air supply opening 213 for detecting the supply humidity of the fresh air.
An indoor humidity detecting means 340 may be provided at the indoor unit suction port 211 for detecting the humidity of the indoor air.
The humidity detected by the detecting means may be relative humidity or air moisture content.
The present application is presented by way of example with respect to moisture content: the fresh air humidity detection device 330 detects the fresh air supply humidity dsa, and the indoor humidity detection device 340 detects the indoor air humidity din.
< fresh air dehumidification control in refrigeration mode >
The control method in the refrigerating mode is introduced below, and the control method can realize that the fresh air supply humidity is not more than the indoor humidity so as to avoid the increase of the indoor humidity caused by introducing fresh air.
When the air conditioner runs in the working state 3 under the refrigeration mode, namely the fresh air fan and the rotating wheel are in the working state.
S11, judging whether dehumidification enhancing operation is needed or not based on fresh air supply moisture content dsa and indoor air moisture content din, if not, keeping the current state, and judging again at intervals of t 0; if necessary, S12: and (5) dehumidifying and reinforcing operation.
In step S11, the specific steps for judging whether the dehumidification enhancing operation is required based on the fresh air supply moisture content dsa and the indoor air moisture content din are as follows: judging whether dsa is less than or equal to din-APr/G is met, if so, indicating that the fresh air humidity is not high, judging that dehumidification enhancing operation is not needed, and maintaining the current state of the air conditioner; if not, it is determined that the dehumidification enhancing operation is required.
Pr represents the moisture dispersion of the indoor human body, G represents the fresh air supply quantity, and A is a correction coefficient.
S12, the step of dehumidification reinforcing operation specifically comprises the following steps:
s121, judging whether the discharge pressure Pd of the compressor meets the preset condition: pd.gtoreq.P1, P1 is a predetermined threshold in the compressor cooling mode, for example P1=3.2 MPa.
If Pd < P1, then S122: controlling the frequency of the compressor; if Pd is greater than or equal to P1, then S123: and controlling the rotating speed of the outdoor fan to increase the gear.
The dehumidification speed of the air conditioner can be increased by the frequency increasing of the compressor and the rotating speed increasing of the outdoor fan. The heat exchange capacity of the fresh air heat exchanger can be improved by increasing the frequency of the compressor, so that fresh air can be cooled and dehumidified better when passing through the fresh air heat exchanger; the rotating speed of the outdoor fan is increased, so that the air quantity of the outdoor air in the first air channel can be increased, and the rotating wheel can be regenerated more quickly under the action of a large amount of the outdoor air.
The dehumidification can be accelerated by increasing the frequency of the compressor or the rotation speed of the outdoor fan, so that the moisture content dsa of fresh air supply is reduced.
In the step of increasing the frequency of the compressor, the frequency of the compressor may be increased according to a preset increase β, that is, the compressor is increased by β on the basis of the current frequency every time the compressor is increased.
After each time of frequency raising of the compressor, whether dehumidification enhancing operation is needed or not is judged again after preset time t1, if so, the frequency of the compressor is increased by beta again until the frequency of the compressor reaches the upper limit value of the working frequency.
In other embodiments, the frequency of the compressor may be increased according to a multiplying factor, for example, the multiplying factor is 1.2, the frequency of the current compressor is h, and the frequency after the compressor is increased is 1.2h.
If it is judged that the dehumidification enhancing operation is still required when the frequency of the compressor reaches the upper limit value, S13 is performed: and controlling the outdoor fan to change the steering.
Similarly, in the step of increasing the rotation speed of the outdoor fan, the rotation speed of the outdoor fan is controlled to be increased by one gear, whether dehumidification enhancing operation is needed or not is judged again after the preset time t2, and if so, the rotation speed of the outdoor fan is increased by one gear again until the rotation speed of the outdoor fan reaches the upper limit value of the gear.
If it is judged that dehumidification enhancing operation is still needed when the rotation speed of the outdoor fan reaches the upper limit value, S13 is performed: and controlling the outdoor fan to change the steering.
When the outdoor fan changes the direction, the wind direction of the first air duct 15 changes: the outdoor air enters the first air duct 15 from the outdoor outlet 14, exchanges heat through the outdoor heat exchanger 112, flows to the rotating wheel 6, and finally circulates to the outdoor atmosphere from the outdoor inlet 13.
Since the outdoor heat exchanger 112 is a condenser, the temperature of the outdoor wind increases when the outdoor wind passes through the outdoor heat exchanger 112, and the regeneration speed of the rotating wheel 6 is increased by the high-temperature outdoor wind passing through the rotating wheel 6, thereby improving the dehumidification effect of the rotating wheel 6.
This application has reached the purpose that utilizes outdoor heat exchanger 112 condensation high temperature to give runner 6 regeneration through the counter-rotating of outdoor fan 3, compares in prior art at the front side of runner 6 sets up special heating device, and this application has omitted heating device, and the structure is simpler, and the cost is also lower.
After S13 controlling the change direction of the outdoor fan, S14: if the indoor relative humidity Hra is not greater than the preset relative humidity lower limit value H, that is, hra is less than or equal to H or it is judged that any one of two conditions of dehumidification enhancing operation is not needed, S15 is entered: the outdoor fan is controlled to change the steering again.
E.g., h=30%; if Hra is less than or equal to 30 percent, the indoor humidity is too dry, so that the normal steering of the outdoor fan is recovered under the condition to avoid excessive dehumidification.
If the dehumidification reinforcing operation is judged not to be needed, the fact that the moisture content of the fresh air supply meets the requirement is indicated, and the outdoor fan can resume normal steering.
After the outdoor fan resumes normal steering, the process returns to the step S11 after the time of t3 to judge the next round.
Under the condition of normal cooling operation of the air conditioner, the outdoor fan operates according to a normal first direction, for example, the first direction is a forward direction; when the frequency of the compressor is maximum and the dehumidification enhancing operation is required, or the rotating speed of the outdoor fan is maximum and the dehumidification enhancing operation is required, the outdoor fan is reversed and rotates reversely according to the second direction.
< fresh air humidification control for heating mode >
The control method under the heating mode is introduced below, and the control method can realize that the fresh air supply humidity is not less than the indoor humidity so as to avoid the reduction of the indoor humidity caused by introducing fresh air.
When the air conditioner runs in the working state 3 under the heating mode, namely the fresh air fan and the rotating wheel are in the working state.
S21, judging whether humidification strengthening operation is needed or not based on fresh air supply moisture content dsa and indoor air moisture content din, if not, keeping the current state, and judging again every t0 time; if necessary, S22 is performed: humidification reinforcing operation.
In step S21, the specific step of determining whether the humidification reinforcing operation is required based on the fresh air supply moisture content dsa and the indoor air moisture content din is: judging whether dsa is more than or equal to din-BPr/G or not, if so, judging that the reinforcing operation is not needed, and maintaining the current state of the air conditioner; if not, it is determined that the reinforcement operation is required.
Wherein Pr represents the moisture dispersion of the indoor human body, G represents the fresh air supply quantity, and B is a correction coefficient.
S22, the step of humidifying and reinforcing operation specifically comprises the following steps:
s221, judging whether the discharge pressure Pd of the compressor meets the preset condition: pd.ltoreq.P2, P2 is a preset critical value in the compression heating mode, for example P2=2.0 MPa.
If Pd is less than or equal to P2, S222: controlling the frequency of the compressor; if Pd > P2, then S223 is performed: and controlling the rotating speed of the outdoor fan to increase the gear.
The humidification speed of the air conditioner can be increased by the frequency increasing of the compressor and the rotating speed increasing of the outdoor fan. The heat exchange capacity of the fresh air heat exchanger can be improved by increasing the frequency of the compressor, so that the temperature rising speed of fresh air is increased, and the moisture in the rotating wheel is separated more quickly and enters a room; the rotating speed of the outdoor fan is increased, so that the air quantity of the outdoor air in the first air channel can be increased, and the rotating wheel can absorb more moisture.
The humidifying capacity can be improved by increasing the frequency of the compressor or the rotating speed of the outdoor fan, so that the moisture content dsa of fresh air supply is increased.
In the step of increasing the frequency of the compressor, the frequency of the compressor may be increased according to a preset increase β, that is, the compressor is increased by β on the basis of the current frequency every time the compressor is increased.
After each time of frequency raising of the compressor, whether dehumidification enhancing operation is needed or not is judged again after preset time t1, if so, the frequency of the compressor is increased by beta again until the frequency of the compressor reaches the upper limit value of the working frequency.
If it is judged that the humidification reinforcing operation is still required when the frequency of the compressor reaches the upper limit value, S23 is performed: and controlling the fresh air fan to reduce the speed.
Similarly, in the step of increasing the rotation speed of the outdoor fan, the rotation speed of the outdoor fan is controlled to be increased by one gear, whether humidification strengthening operation is needed or not is judged again after the preset time t2, and if so, the rotation speed of the outdoor fan is increased by one gear again until the rotation speed of the outdoor fan reaches the upper limit value of the gear.
If it is judged that the humidification reinforcing operation is still required when the rotation speed of the outdoor fan reaches the upper limit value, S23: and controlling the fresh air fan to reduce the speed.
The air supply amount of the fresh air can be reduced by the speed reduction of the fresh air fan, the absolute humidity of the fresh air supply is high, and the regeneration effect of the rotating wheel can be improved, so that the air supply moisture content dsa of the fresh air can be improved.
After the fresh air fan is lowered by one gear each time, returning to the step S21 after the time of t3 to judge the next round.
In the above control method, the purpose of the air conditioning operation is to ensure that fresh air does not cause an increase in indoor humidity during cooling and that fresh air does not cause a decrease in indoor humidity during heating.
< control to avoid frosting >
In some embodiments of the present application, to avoid frosting of the outdoor heat exchanger, the present application provides for control to avoid frosting based on outdoor environmental conditions.
Specifically, referring to fig. 9, the controller 300 may control the power of the electric heating device 72 based on whether the outdoor temperature and humidity are in the frosting prone region.
The air conditioner further includes an outdoor temperature and humidity sensing device 350 and a coil temperature sensing device 360.
The outdoor temperature and humidity detecting device 350 is disposed on the windward side of the outdoor heat exchanger, and is used for detecting the temperature and humidity of the outdoor wind.
The coil temperature detecting device 360 is provided on the coil of the outdoor heat exchanger, and detects the temperature Tp of the outdoor heat exchanger.
The control method for avoiding frosting of the outdoor heat exchanger comprises the following steps:
s31, judging whether the outdoor temperature and the humidity are in a preset frost-prone area or not in a heating mode, wherein the condition of the frost-prone area is that the outdoor temperature Toa is less than or equal to T0, the outdoor relative humidity Hoa is less than or equal to H0, and the T0 and the H0 are preset values, for example, T0=5 ℃, and H0=70%.
If the outdoor heat exchanger is not in the area easy to frost, namely Toa is less than or equal to 5 ℃ and Hoa is less than or equal to 70%, the outdoor heat exchanger is not easy to frost under the outdoor temperature and humidity condition, and the current state is maintained.
If the outdoor heat exchanger is in the area with easy frosting, namely Toa is less than or equal to 5 ℃ and Hoa is more than or equal to 70%, the outdoor temperature and humidity condition is indicated to easily cause frosting of the outdoor heat exchanger, and the process goes to S32.
S32, calculating the dew point temperature TL of the outdoor wind before the outdoor heat exchanger.
Since the dew point temperature TL can be calculated according to the temperature and humidity detected by the outdoor temperature and humidity detecting device 350, and belongs to the prior art, a specific calculation method will not be described in detail herein.
S33, judging whether the relation between the detection value Tp of the coil temperature detection device and the dew point temperature TL meets the preset frosting-prone condition or not: tp < tl+d, D being a preset value, e.g. d=1 ℃.
If the frosting-prone condition is not met, namely Tp is less than TL+D, the current state is maintained;
if the frosting prone condition is satisfied, that is, tp < tl+d is satisfied, which means that the outdoor heat exchanger has a high possibility of frosting, the process proceeds to S34.
S34, the electric heating device works.
When the electric heating device works, the regeneration temperature of the rotating wheel can be increased, so that the moisture of the rotating wheel is separated as soon as possible, the adsorption capacity of the rotating wheel is improved, the outdoor rheumatism degree is reduced, the temperature is increased, the temperature of the rotating wheel is also increased under the action of the heating device, and the temperature of outdoor wind is further increased, so that frosting of an outdoor heat exchanger is avoided.
After the electric heating device is started, returning to the S33 after the time t for re-judging, if the condition of easy frosting is still met, continuously increasing the power of the electric heating device, wherein the power of the electric heating device can be increased from low to high.
< one embodiment of humidification control >
When the moisture content of the outdoor air is relatively low, the indoor humidity is lowered when fresh air is introduced into the room, and thus, it is necessary to humidify the fresh air.
Specifically, the controller 300 may control the wheel speed, the outdoor fan speed, or the power of the electric heating device based on the indoor set humidity and the indoor return air humidity.
The control method of this embodiment includes:
s41, judging whether the outdoor humidity is in a low humidity area or not under the heating mode, wherein the condition of the low humidity area is that the outdoor relative humidity Hoa is less than H0.
If the outdoor humidity is in the low humidity region, the outdoor humidity is not in the frost-prone region, and control for humidification can be performed without considering control for avoiding frost formation.
If the indoor air is not in the low humidity area, namely Hoa is less than 70%, the outdoor air has higher moisture content, the indoor humidity cannot be reduced when fresh air is introduced into the indoor, and the current state is maintained.
If the outdoor air is in the low humidity area, that is, hoa < 70% is established, which means that the moisture content of the outdoor air is low, and the fresh air needs to be humidified, the process goes to S42.
S42, judging whether the indoor set humidity exceeds the sum of the indoor return air humidity and the first preset allowable value, namely whether Hs is more than or equal to Hra+M or ds is more than or equal to dra+N.
Wherein, hs represents indoor set relative humidity, hra represents indoor return air relative humidity, ds represents indoor set moisture content, dra represents indoor return air moisture content, and M, N is a preset value.
If not, then maintaining the current state; if it is determined that the indoor humidity is relatively small, humidification is required to achieve the indoor set humidity by the user, and the process proceeds to S43.
S43, controlling the rotating wheel to increase the rotating speed, the outdoor fan to increase the rotating speed or the electric heating device to work.
The rotating wheel can increase the rotating speed, the outdoor fan can increase the rotating speed or the electric heating device can work in three modes, so that the indoor humidity is increased by introducing the fresh air with high humidity into the indoor, and the indoor humidity can meet the indoor set humidity.
The rotating speed of the rotating wheel is increased, and the rotating speed of the outdoor fan is increased, so that the outdoor air quantity flowing through the rotating wheel can be increased, and the adsorption area of the rotating wheel can absorb more moisture to supply fresh air for humidification.
The electric heating device can work to increase the regeneration temperature of the regeneration zone of the rotating wheel, so that the moisture in the regeneration zone is separated more quickly, and the moisture content of fresh air is increased.
The following three ways of following steps are described:
mode one, the rotating wheel increases the rotating speed
After the rotation speed of the rotating wheel is increased, the process goes to S44 after the time t 1.
S44, judging whether the indoor return air humidity exceeds the sum of the indoor set humidity and a second preset allowable value, namely whether Hra is more than or equal to Hs+X or dra is more than or equal to ds+Y is met.
If so, indicating that the indoor return air humidity is close to the indoor set humidity, and maintaining the current rotating speed of the rotating wheel; if not, if the indoor return air humidity is not close to the indoor set humidity, the process proceeds to S45: the rotating speed of the rotating wheel is increased again by one gear, and after the time t1, the process returns to S44 to judge the next round.
It should be noted that the first preset allowable value and the second preset allowable value may be the same or different; when the two values are different, the first preset allowable value may be greater than the second preset allowable value, i.e., N > Y, M > X.
For example, in ds. Gtoreq. Dra+N, when this formula is established, since the first preset allowable value N is greater, this means that the indoor set humidity is greater than the indoor return air humidity, in which case measures (rotation wheel rotation speed increase, outdoor fan rotation speed increase or heating device operation) are necessary to increase the humidification speed; if the first preset allowable value N is smaller, the condition that the indoor set humidity is higher than the indoor return air humidity is less may exist, and at this time, the air conditioner maintains the current humidification speed, so that the indoor return air humidity is close to the indoor set humidity quickly, and no measures are necessary to improve the humidification speed.
Mode two, outdoor fan promotes rotational speed
After the rotation speed of the outdoor fan is increased, the process enters S44 after the time t 1.
S44, judging whether the indoor return air humidity exceeds the sum of the indoor set humidity and a second preset allowable value, namely whether Hra is more than or equal to Hs+X or dra is more than or equal to ds+Y is met.
If so, the indoor return air humidity is close to the indoor set humidity, and the outdoor fan maintains the current rotating speed; if not, if the indoor return air humidity has not been close to the indoor set humidity, the process proceeds to S46: the rotation speed of the outdoor fan is increased again by one gear, and after the time t1, the next round of judgment is carried out by returning to S44.
Mode three, operation of electric heating device
The electric heating device is started, and the process proceeds to S44 after time t 1.
S44, judging whether the indoor return air humidity exceeds the sum of the indoor set humidity and a second preset allowable value, namely whether Hra is more than or equal to Hs+X or dra is more than or equal to ds+Y is met.
If so, the electric heating device maintains the current state when the indoor return air humidity is close to the indoor set humidity; if not, if the indoor return air humidity has not been close to the indoor set humidity, the process proceeds to S47: the power of the electric heating device is increased by a first gear, and after the time t1, the process returns to S44 to judge the next round.
< another embodiment of humidification control >
In order to select the optimal humidification mode from the three modes, the application also provides the following embodiments:
s51, judging whether the outdoor environment is in a low-humidity area or not under the heating mode, wherein the condition of the low-humidity area is that the outdoor relative humidity Hoa is less than H0.
If the temperature is not in the low humidity area, namely Hoa is less than 70 percent, the current state is maintained; if in the low humidity region, hoa < 70% is true, the process proceeds to S52.
S52, judging whether the indoor set humidity exceeds the sum of the indoor return air humidity and the first preset allowable value, namely whether Hs is more than or equal to Hra+M or ds is more than or equal to dra+N.
If not, then maintaining the current state; if yes, the process proceeds to S53.
S53, judging the recording times of the current environment working condition in the memory.
If the recording times Z of the current environmental conditions meet the following conditions: z.ltoreq.n, S54 is performed, where n.gtoreq.0.
Wherein the current environmental conditions comprise the temperature and humidity of the outdoor environment and the indoor return air humidity dra i 。
If the recorded times Z of the current environmental conditions meet the following conditions: and if n+1 is not less than Z is not less than n+1+m, recording the current environmental working condition, and executing S55, wherein m is not less than 0.
If the recorded times Z of the current environmental conditions meet the following conditions: and if n+2+m is not less than Z and not more than n+2+m+p, recording the current environmental condition, and executing S56, wherein p is not less than 0.
If the number of times the current environmental condition is recorded satisfies Z.gtoreq.n+3+m+p, then S57 is executed.
S54, executing one of three reinforcement modes of rotating speed lifting first gear of the rotating wheel, rotating speed lifting first gear of the outdoor fan and starting the electric heating device, and calculating and recording the change rate delta d1 of the return air humidity in the current reinforcement mode after an interval t 2.
S55, selecting one of the reinforcement modes different from the reinforcement mode in S54, and calculating and recording the change rate delta d2 of the return air humidity in the current reinforcement mode after the interval t 2.
S56, selecting a reinforcing mode different from the reinforcing modes S54 and S55, and calculating and recording the change rate delta d3 of the return air humidity in the current reinforcing mode after the interval t 2.
S57, executing the reinforcement mode corresponding to the largest one of the Δd1, Δd2 and Δd3 in the record.
Illustratively, n=0, m=0, p=0.
When z=0, i.e. the current environmental condition is not recorded, entering S54, and executing a first gear of rotation speed increase of the rotating wheel; when z=1, i.e. the current environmental condition is recorded once, entering S55, and executing a first gear of rotation speed increase of the outdoor fan; when z=2, i.e. the current environmental condition is recorded twice, entering S56, and executing to start the electric heating device; when Z is more than or equal to 3, that is, the current environmental condition is recorded three times or more, the reinforcement mode corresponding to the largest one of Deltad1, deltad2 and Deltad 3 in S57 and execution record is entered.
The following three ways of following steps are described:
mode one, the rotating wheel increases the rotating speed
After the rotating speed of the rotating wheel is increased by one gear, the rotating wheel enters S58 after t1 (t 1 is more than or equal to t 2) time.
S58, judging whether the indoor return air humidity exceeds the sum of the indoor set humidity and a second preset allowable value, namely whether Hra is more than or equal to Hs+X or dra is more than or equal to ds+Y is met.
If yes, the rotating wheel maintains the current rotating speed; if not, the process advances to S59.
S59, the rotating speed of the rotating wheel is increased again by one gear, and after the time t1, the process returns to S58 to judge the next round.
In this mode, the return air humidity change rate Δd1 is calculated according to the following formula:
Δd1＝(dra i+1 -dra i )/Δw1
wherein dra i+1 The indoor return air moisture content after the first gear of rotation speed of the rotating wheel is increased;
dra i the indoor return air moisture content before the first gear is lifted for the rotating speed of the rotating wheel;
Δw1 is the power change value before and after the rotation speed adjustment of the rotating wheel.
Mode two, outdoor fan promotes rotational speed
The rotating speed of the outdoor fan is increased by one gear, and the fan enters S58 after t1 (t 1 is more than or equal to t 2) time.
S58, judging whether the indoor return air humidity exceeds the sum of the indoor set humidity and a second preset allowable value, namely whether Hra is more than or equal to Hs+X or dra is more than or equal to ds+Y is met.
If yes, maintaining the current rotating speed of the outdoor fan; if not, the process proceeds to S60.
S60, the rotating speed of the outdoor fan is increased again by one gear, and after the time t1, the process returns to S58 to judge the next round. In this mode, the return air humidity change rate Δd2 is calculated according to the following formula:
Δd2＝(dra i+1 -dra i )/Δw2
wherein dra i+1 The indoor return air moisture content after the first gear of the rotating speed of the outdoor fan is increased;
dra i the indoor return air moisture content before the first gear is increased for the rotating speed of the outdoor fan;
Δw2 is the power change value before and after the rotation speed of the outdoor fan is adjusted.
Mode three, operation of electric heating device
The electric heating device is started, and S58 is carried out after t1 (t 1 is more than or equal to t 2) time.
S58, judging whether the indoor return air humidity exceeds the sum of the indoor set humidity and a second preset allowable value, namely whether Hra is more than or equal to Hs+X or dra is more than or equal to ds+Y is met.
If yes, the electric heating device maintains the current state; if not, the process proceeds to S61.
S61, the power of the electric heating device is increased by first gear, and after t1 time, the process returns to S58 to carry out the judgment of the next round.
In this mode, the return air humidity change rate Δd3 is calculated according to the following formula:
Δd3＝(dra i+1 -dra i )/Δw3
wherein dra i+1 The indoor return air moisture content after the electric heating device works;
dra i the indoor return air moisture content before the electric heating device works;
Δw3 is the power change value before and after the electric heating device is started.
In this application, at the earlier stage of air conditioner new trend humidification operation, three kinds of enhancement modes are operated respectively to calculate the return air humidity change rate under various enhancement modes, just can obtain the best mode of humidification effect through the comparison of return air humidity change rate, thereby just can go on according to the best mode of humidification effect in the operation after the air conditioner.
In the first concept of the present application, the runner 6 is disposed on the windward side of the outdoor heat exchanger 112 of the outdoor unit, so that the moisture of the outdoor wind is absorbed by the runner 6 and then flows to the outdoor heat exchanger 112, the air flowing to the outdoor heat exchanger 112 is ensured to be dry low-temperature air, and the problem that the outdoor heat exchanger 112 is prone to frosting in winter is avoided.
The second concept of the present application is to set a second air duct in the outdoor unit, and set a fresh air heat exchanger or/and an electric heating device on the windward side of the rotating wheel 6, and when the heating operation is performed, the fresh air heat exchanger or/and the electric heating device is used as a heat source of the regeneration zone of the rotating wheel 6, so that the moisture in the rotating wheel 6 is separated, and the fresh air humidification is realized while the frosting of the outdoor heat exchanger 112 is avoided.
In the third concept of the present application, the second air duct is provided in the outdoor unit, and the fresh air heat exchanger or/and the electric heating device is provided on the windward side of the rotating wheel 6, so that the fresh air can be dehumidified and then sent into the inner room due to the adsorption of the rotating wheel 6 during the cooling operation.
The fourth concept of the present application determines whether or not a reinforced operation of dehumidification/humidification is required according to a comparison of fresh air supply humidity and indoor humidity, so that the fresh air does not cause an increase/decrease in indoor humidity, and a change in indoor humidity is avoided while the fresh air is introduced.
The fifth conception of the present application achieves the purpose of regenerating the rotating wheel 6 by utilizing the condensing high temperature of the outdoor heat exchanger 112 by the reverse rotation of the outdoor fan 3 when introducing fresh air indoors in the cooling mode, improves the dehumidifying effect of the system on fresh air, and omits the heating device compared with the prior art that a special heating device is arranged on the front side of the rotating wheel 6.
According to the sixth conception, whether the outdoor environment temperature and humidity are in the frost-prone area serves as a primary condition for avoiding frost formation control, so that entering time for avoiding the frost formation control is more accurate.
According to the seventh conception, three enhancement modes are operated respectively at the earlier stage of fresh air humidification operation of the air conditioner, the change rate of the return air humidity under various enhancement modes is calculated, and the mode with the best humidification effect can be obtained through comparison of the change rates of the return air humidity, so that the operation after the air conditioner can be performed according to the mode with the best humidification effect, and the humidification speed of the air conditioner is fastest.
The terms "first", "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" or the like may include one or more such features, either explicitly or implicitly. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
The terms "comprises," "comprising," and the like are used to specify the presence of stated features, integers, steps, operations, elements, components, or groups thereof, but do not preclude the presence or addition of one or more other features, elements, steps, operations, elements, components, or groups thereof.
Terms such as "unit," "portion," "block," "member" and "module" indicate a unit for processing at least one function or operation. For example, these terms may refer to at least one process processed by at least one piece of hardware, such as a Field Programmable Gate Array (FPGA), an Application Specific Integrated Circuit (ASIC), at least one piece of software stored in a memory or processor.
The identification code is used for ease of description, but is not intended to illustrate the order of each step. Unless the context clearly indicates otherwise, each step may be implemented in a different order than that shown.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
The foregoing description, for purposes of explanation, has been presented in conjunction with specific embodiments. However, the illustrative discussions above are not intended to be exhaustive or to limit the embodiments to the precise forms disclosed above. Many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles and the practical application, to thereby enable others skilled in the art to best utilize the embodiments and various embodiments with various modifications as are suited to the particular use contemplated.
Claims (10)
1. An air conditioner, comprising: an outdoor unit;
the outdoor unit includes:
the shell is internally provided with a first air duct, and two ends of the first air duct are respectively communicated with the outside;
the outdoor heat exchanger is arranged in the first air duct and is used for exchanging heat with outdoor air in the first air duct;
the outdoor fan is used for driving outdoor air in the first air duct to flow;
the shell is internally provided with a second air duct which is connected with a fresh air pipe and used for feeding fresh air into the room;
the outdoor unit further includes:
a wheel rotatably coupled within the housing, the wheel having a first portion positioned in the first air path and a second portion positioned in the second air path;
the heating device is arranged on the windward side of the second part and is used for heating fresh air flowing to the second part;
when the air conditioner is in heating operation, the outdoor heat exchanger is used as an evaporator, a first part of the rotating wheel is an adsorption zone, a second part of the rotating wheel is a regeneration zone, and outdoor wind is ventilated in the adsorption zone, so that the outdoor wind is absorbed by the adsorption zone and then flows to the outdoor heat exchanger; and the fresh air heated by the heating device is ventilated in the regeneration zone, so that the moisture absorbed by the rotating wheel is separated.
2. The air conditioner according to claim 1, wherein the heating means is a fresh air heat exchanger;
when the outdoor heat exchanger is used as an evaporator, the fresh air heat exchanger is used as a condenser; when the outdoor heat exchanger is used as a condenser, the fresh air heat exchanger is used as an evaporator.
3. The air conditioner of claim 2, further comprising: the compressor, the four-way valve and the second stop valve;
a first electromagnetic valve is connected in series between the exhaust end of the compressor and the D pipe of the four-way valve, and the E pipe of the four-way valve is connected in series with a second electromagnetic valve and then connected to the second stop valve;
the switching valve further comprises a first interface, a second interface, a third interface and a fourth interface;
the exhaust end of the compressor is connected to a first interface of the switching valve, a second interface of the switching valve is connected to the input end of the fresh air heat exchanger, a third interface of the switching valve is connected between the second electromagnetic valve and the second stop valve, and a fourth interface of the switching valve is plugged;
the output end of the fresh air heat exchanger is connected with the D pipe of the four-way valve to form a first branch, the output end of the fresh air heat exchanger is connected with the suction end of the compressor to form a second branch, a third electromagnetic valve is connected in series on the first branch, and a fourth electromagnetic valve is connected in series on the second branch.
4. The air conditioner of claim 1, wherein the outdoor unit further comprises:
and the fresh air fan is arranged in the second air channel and used for driving fresh air in the second air channel to flow to the fresh air pipe.
5. The air conditioner of claim 1, wherein the space of the housing is partitioned into a fan chamber and a press chamber; the first air duct is positioned in the fan cavity, and the second air duct is positioned at one side, close to the press cavity, of the fan cavity.
6. The air conditioner of claim 1, wherein the wheel is located on a windward side of the outdoor heat exchanger when the outdoor fan rotates in a first direction;
the outdoor fan is located at an air outlet side of the outdoor heat exchanger when rotated in a second direction opposite to the first direction, so that the outdoor air heated by the outdoor heat exchanger is blown toward the rotating wheel when the air conditioner is operated to cool.
7. The air conditioner of claim 1, wherein the outdoor fan is located at a side of the outdoor heat exchanger remote from the wheel, or the outdoor fan is located between the wheel and the outdoor heat exchanger.
8. The air conditioner according to claim 1, wherein the heating means comprises a fresh air heat exchanger and an electric heating means;
the electric heating device is positioned between the fresh air heat exchanger and the rotating wheel.
9. The air conditioner of claim 1, wherein the second portion is smaller in volume than the first portion.
10. An air conditioner, comprising: an outdoor unit;
the outdoor unit includes:
a first air duct is arranged in the shell;
the outdoor heat exchanger is arranged in the first air duct and is used for exchanging heat with outdoor air in the first air duct;
the outdoor fan is used for driving outdoor wind to flow;
wherein, a second air duct is also arranged in the shell;
the outdoor unit further includes:
the heating device is arranged in the second air duct and is used for heating air in the second air duct when the air conditioner heats;
a wheel rotatably coupled within the housing, the wheel having a first portion positioned in the first air path and a second portion positioned in the second air path; when the air conditioner is in heating operation, the first part is positioned on the windward side of the outdoor heat exchanger and used for absorbing moisture in outdoor wind, and the second part is positioned on the air outlet side of the heating device and used for receiving air heated by the heating device so as to regenerate the absorbent of the rotating wheel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322235126.4U CN220750240U (en) | 2023-08-18 | 2023-08-18 | Air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322235126.4U CN220750240U (en) | 2023-08-18 | 2023-08-18 | Air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220750240U true CN220750240U (en) | 2024-04-09 |
Family
ID=90559695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322235126.4U Active CN220750240U (en) | 2023-08-18 | 2023-08-18 | Air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220750240U (en) |
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2023
- 2023-08-18 CN CN202322235126.4U patent/CN220750240U/en active Active
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