CN110864362B - Indoor unit of air conditioner - Google Patents

Indoor unit of air conditioner Download PDF

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Publication number
CN110864362B
CN110864362B CN201810942138.1A CN201810942138A CN110864362B CN 110864362 B CN110864362 B CN 110864362B CN 201810942138 A CN201810942138 A CN 201810942138A CN 110864362 B CN110864362 B CN 110864362B
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China
Prior art keywords
air
air outlet
pipe
shell
indoor unit
Prior art date
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CN201810942138.1A
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Chinese (zh)
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CN110864362A (en
Inventor
戴现伟
王永涛
孙亚琼
张蕾
王晓刚
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Qingdao Haier Air Conditioner Gen Corp Ltd
Haier Smart Home Co Ltd
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Application filed by Qingdao Haier Air Conditioner Gen Corp Ltd, Haier Smart Home Co Ltd filed Critical Qingdao Haier Air Conditioner Gen Corp Ltd
Priority to CN201810942138.1A priority Critical patent/CN110864362B/en
Publication of CN110864362A publication Critical patent/CN110864362A/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0011—Indoor units, e.g. fan coil units characterised by air outlets
    • F24F1/0014—Indoor units, e.g. fan coil units characterised by air outlets having two or more outlet openings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
    • F24F1/0007—Indoor units, e.g. fan coil units
    • F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
    • F24F1/0033—Indoor units, e.g. fan coil units characterised by fans having two or more fans
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F24F2013/205—Mounting a ventilator fan therein
    • 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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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Air-Conditioning Room Units, And Self-Contained Units In General (AREA)

Abstract

The invention provides an indoor unit of an air conditioner, which comprises a shell with an upper air outlet and a lower air outlet, a heat exchanger positioned in the shell, two air supply fans and a fresh air device, wherein the fresh air device comprises a fresh air pipe which is communicated with an outdoor environment and extends into the shell and a fresh air fan which causes outdoor environment air to flow to the heat exchanger through the fresh air pipe, one air supply fan is configured to cause part of air flow after heat exchange with the heat exchanger to flow upwards so as to blow out the part of air flow from the upper air outlet, and the other air supply fan is configured to cause part of air flow after heat exchange with the heat exchanger to flow downwards so as to blow out the part of air flow from the lower air outlet. The air conditioner indoor unit is provided with the two air outlets and the two air supply fans, so that the opening of the different air supply fans can be controlled according to different operation modes of the air conditioner indoor unit, and the refrigerating and heating experience can be improved; and the convection exchange of indoor and outdoor air can be realized by additionally arranging the fresh air device, so that the air quality of the indoor environment is improved.

Description

Indoor unit of air conditioner
Technical Field
The invention relates to the technical field of household appliances, in particular to an air conditioner indoor unit.
Background
The existing wall-mounted air conditioner indoor unit generally uses a cross-flow fan and a bent heat exchanger to supply air to an air outlet, the air supply range is limited, the air supply mode is fixed and inflexible, and the comfort and diversity requirements of users are difficult to meet.
Disclosure of Invention
In view of the above, it is an object of the present invention to provide an air conditioning indoor unit that overcomes or at least partially solves the above-mentioned problems.
It is a further object of the present invention to improve the indoor air quality and the air supply effect of the indoor unit.
The invention provides an air conditioner indoor unit, comprising:
the shell is provided with an air inlet area, an upper air outlet positioned at the upper part of the front side of the shell and a lower air outlet positioned at the lower part of the front side of the shell;
the heat exchanger is arranged at the inner side of the air inlet area in the shell so as to exchange heat with indoor ambient air entering through the air inlet area;
fresh air device includes:
the new air pipe is communicated with the outdoor environment and extends into the shell;
the fresh air fan is arranged in the shell and is connected and communicated with one end of the fresh air pipe extending into the shell and is configured to promote outdoor ambient air to flow to the heat exchanger through the fresh air pipe so that the outdoor ambient air enters the shell to exchange heat with the heat exchanger;
the indoor unit of the air conditioner further comprises:
and the two air supply fans are arranged in the accommodating space in the shell, wherein one air supply fan is configured to promote the flow of part of air after heat exchange with the heat exchanger to the upper part of the accommodating space so as to blow out the part of air flow from the upper air outlet, and the other air supply fan is configured to promote the flow of part of air after heat exchange with the heat exchanger to the lower part of the accommodating space so as to blow out the part of air flow from the lower air outlet.
Optionally, two air inlet areas are formed on two lateral sides of the shell and are distributed relatively;
the two heat exchangers are in one-to-one correspondence with the two air inlet areas and are respectively arranged on the inner sides of the corresponding air inlet areas in the shell so as to perform heat exchange with ambient air entering through the corresponding air inlet areas to form heat exchange airflow.
Optionally, the fresh air device is one, and the fresh air fan of the fresh air device is a centrifugal fan;
a fresh air duct of a fresh air device extends into the housing adjacent one of the heat exchangers, and the fresh air fan is configured to cause outdoor ambient air to flow through the fresh air duct toward the adjacent heat exchanger so that the outdoor ambient air enters the housing for heat exchange with the adjacent heat exchanger.
Optionally, the two fresh air devices are in one-to-one correspondence with the two heat exchangers, and the two fresh air fans of the two fresh air devices are centrifugal fans;
the two fresh air pipes of the two fresh air devices extend into the shell respectively and are close to the corresponding heat exchangers, and the two fresh air fans are respectively configured to promote outdoor ambient air to flow to the corresponding heat exchangers through the corresponding fresh air pipes so that the outdoor ambient air enters the shell to exchange heat with the corresponding heat exchangers.
Optionally, the fresh air device further comprises a purifying module, and the purifying module is arranged on an air inlet path between the fresh air pipe and the fresh air fan to purify outdoor ambient air entering the shell.
Optionally, the upper air outlet and the lower air outlet are recorded as two air outlets of the indoor unit of the air conditioner;
the two air supply fans are centrifugal fans, the centrifugal fans which cause part of air to flow to the upper part of the accommodating space are provided with upward fan air outlets, and the centrifugal fans which cause the other part of air to flow to the lower part of the accommodating space are provided with downward fan air outlets;
the air conditioner indoor unit further comprises two air guide covers which are in one-to-one correspondence with the two centrifugal fans, each air guide cover is provided with an air collecting cavity communicated with the fan air outlets of the corresponding centrifugal fans and a guide air duct communicated with the air collecting cavity, and a guide air outlet opposite to the corresponding air outlets is formed in the front side of the guide air duct so as to guide heat exchange air flow to the corresponding air outlets.
Optionally, the air conditioner indoor unit further includes:
two air outlet pipes extending forwards and backwards and distributed in the accommodating space up and down, wherein the air outlet pipe positioned above corresponds to the air guide sleeve positioned above, and the air outlet pipe positioned below corresponds to the air guide sleeve positioned below;
Each air outlet pipe comprises an outer pipe extending forwards and backwards and a first inner pipe connected to the inner peripheral wall of the outer pipe and extending from back to front in a gradually expanding manner to protrude out of the front side of the outer pipe, and the air inlet end of the outer pipe penetrates through the air guide outlet of the corresponding air guide cover and is positioned in the corresponding air guide duct so that heat exchange air flow enters the corresponding air outlet pipe;
the first inner tube air inlet end is located the position of outer tube inner near outer tube front end, and first inner tube air outlet end protrusion is in the air outlet front side that corresponds, and forms first interval space between outer tube inner peripheral wall and the first inner tube periphery wall to the heat exchange air current passes through.
Optionally, each air outlet pipe further comprises a second inner pipe, the second inner pipe extends in a gradually expanding mode from back to front in the corresponding first inner pipe, and a second interval space is formed between the outer peripheral wall of the second inner pipe and the inner peripheral wall of the corresponding first inner pipe so that heat exchange air flows through.
Optionally, each air outlet pipe is configured to controllably move along the front-rear direction between a position protruding from the front side of the corresponding air outlet and a position retracted to the corresponding air outlet;
when the air outlet pipe is retracted to the position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe is abutted with the inner peripheral wall of the corresponding air outlet so as to seal the first interval space, and heat exchange air flows are blown out from the second interval space and the second inner pipe to the front side respectively;
When the air outlet pipe is positioned at a position protruding out of the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes out of the front side of the corresponding air outlet so as to expose the first interval space, and therefore heat exchange air flows are blown out of the first interval space, the second interval space and the second inner pipe to the front side respectively.
Optionally, the shell comprises a rear shell with an open front side and a front panel positioned at the front side of the rear shell and forming an accommodating space with the rear shell;
the two air inlet areas are formed on two lateral sides of the rear shell, the upper air outlet and the lower air outlet are formed on the front panel and are respectively positioned on the upper part of the front panel and the lower part of the front panel.
The indoor unit of the air conditioner is provided with the two air outlets which are distributed up and down, the upper air outlet and the lower air outlet are mutually supported, the abrupt nature brought by one air outlet in vision is avoided, the overall appearance of the indoor unit is more harmonious and attractive, and the higher aesthetic requirement of a user is met; in addition, compared with the traditional air conditioner indoor unit with one air supply fan, the indoor unit is provided with two air supply fans with relatively smaller sizes, so that the internal accommodating space of the indoor unit is more reasonably distributed, and the overall volume and thickness of the air conditioner indoor unit are reduced; in addition, the two air supply fans can be independently controlled to operate, so that the opening of the different air supply fans can be controlled according to different operation modes of the indoor unit of the air conditioner, and the refrigerating and heating experience can be improved; in addition, the indoor unit is additionally provided with a new air pipe, so that convection exchange of indoor and outdoor air can be realized, and the air quality of the indoor environment is improved.
Furthermore, in the indoor unit of the air conditioner, the two air outlets are respectively provided with the air outlet pipes, and the air outlet range of the indoor unit is enlarged by utilizing the air outlet pipes with special structural design, so that the air supply uniformity and the air supply comfort are improved.
Furthermore, in the indoor unit of the air conditioner, the two air outlet pipes can be controlled to move back and forth, and the air outlet ranges, the air outlet distances, the air outlet uniformity and the air supply efficiency of the two air outlet pipes of the indoor unit can be respectively adjusted according to different operation modes of the indoor unit, so that the air supply effect of the indoor unit is further enhanced, and the user comfort experience is improved.
The above, as well as additional objectives, advantages, and features of the present invention will become apparent to those skilled in the art from the following detailed description of a specific embodiment of the present invention when read in conjunction with the accompanying drawings.
Drawings
Some specific embodiments of the invention will be described in detail hereinafter by way of example and not by way of limitation with reference to the accompanying drawings. The same reference numbers will be used throughout the drawings to refer to the same or like parts or portions. It will be appreciated by those skilled in the art that the drawings are not necessarily drawn to scale. In the accompanying drawings:
fig. 1 is a front view of an indoor unit of an air conditioner according to an embodiment of the present invention;
Fig. 2 is a schematic view illustrating an internal structure of an indoor unit of an air conditioner according to an embodiment of the present invention, in which a front panel is omitted to show the internal structure of the indoor unit;
fig. 3 is an exploded view of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 4 is a schematic structural view of a fresh air device of an indoor unit of an air conditioner according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a pod of an air conditioner indoor unit according to an embodiment of the present invention;
fig. 6 is a schematic structural view of one direction of an outlet duct of an indoor unit of an air conditioner according to an embodiment of the present invention; and
fig. 7 is a schematic cross-sectional view of an outlet duct of an indoor unit of an air conditioner according to an embodiment of the present invention.
Detailed Description
An air conditioning indoor unit 10 according to an embodiment of the present invention is described below with reference to fig. 1 to 7. Where the terms "front", "rear", "upper", "lower", "inner", "outer", "transverse" and the like are used in terms of orientation or positional relationship based on that shown in the drawings, they are merely for convenience of description and simplicity of description, and do not denote or imply that the referenced devices or elements must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention.
Fig. 1 is a front view of an air conditioning indoor unit 10 according to an embodiment of the present invention, fig. 2 is a schematic view of an internal structure of the air conditioning indoor unit 10 according to an embodiment of the present invention, wherein a front panel 12 is hidden to show the internal structure of the indoor unit 10, fig. 3 is an exploded schematic view of the air conditioning indoor unit 10 according to an embodiment of the present invention, and fig. 4 is a schematic configuration view of a fresh air device 108 of the air conditioning indoor unit 10 according to an embodiment of the present invention.
As shown in fig. 1 to 3, the air conditioning indoor unit 10 of the present embodiment is a wall-mounted air conditioning indoor unit, and includes a casing, two blower fans provided in an accommodation space inside the casing, and a heat exchanger 13 provided inside the casing. The housing is formed with an air inlet region 11a and two air outlets, one of which is formed at the upper portion of the front side of the housing and denoted as an upper air outlet 12a, and the other of which is formed at the lower portion of the front side of the housing and denoted as a lower air outlet 12b. One of the two air-sending fans is configured to cause a part of the air flow to flow from the air-intake area 11a toward the upper portion of the accommodating space so that the part of the air flow is blown out from the upper air outlet 12a, and the other air-sending fan is configured to cause a part of the air flow to flow from the air-intake area 11a toward the lower portion of the accommodating space so that the part of the air flow is blown out from the lower air outlet 12b.
The heat exchanger 13 is provided in the housing on the air inlet area 11a and the air inlet passage of the air supply fan so as to exchange heat with the ambient air entering through the air inlet area 11 a. In the embodiment in which two air inlet areas 11a are formed on two lateral sides of the housing, two heat exchangers 13 are respectively arranged inside the corresponding air inlet areas 11a in the housing and are in one-to-one correspondence with the two air inlet areas 11a, so as to perform heat exchange with the ambient air entering through the corresponding air inlet areas 11 a.
In some embodiments, the projection of the housing on the vertical plane carrying the air conditioning indoor unit 10 is circular, and the projections of the upper air outlet 12a and the lower air outlet 12b on the vertical plane are all circular, so that the overall air conditioning indoor unit 10 is unique and attractive in appearance, and is completely different from the existing long-strip wall-mounted air conditioning indoor unit 10, and the personalized aesthetic requirements of users are met.
In the prior art, the air conditioning indoor units 10 with similar shapes are provided with an air outlet and an air supply fan, so as to meet the air supply requirement of the air conditioning indoor units 10, the power of the air supply fan is larger, the size is larger, the overall thickness of the air conditioning indoor units 10 (the size in the front-back direction of the air conditioning indoor units 10) is larger, and the front side of the indoor units 10 is provided with the air outlet on the flat surface, so that the overall attractiveness of the indoor units 10 is affected. In this embodiment, the air conditioning indoor unit 10 with a circular appearance is completely new and improved, and the air conditioning indoor unit 10 is supplied by adopting two air supply fans, wherein the two air supply fans are relatively smaller in size, so that the accommodating space in the shell can be more reasonably distributed, and the overall volume and thickness of the air conditioning indoor unit 10 can be greatly reduced; and, through forming the upper air outlet 12a in casing front side upper portion, form the lower air outlet 12b in casing front side lower part, upper air outlet 12a and lower air outlet 12b set off each other, avoid an air outlet to bring suddenly in the vision for indoor set 10 whole appearance is harmonious more, pleasing to the eye, satisfies the higher aesthetic requirement of user.
In addition, since the indoor unit 10 has two independent air supply fans and two independent air outlets, the states of the two air supply fans can be controlled according to the operation mode of the indoor unit 10 to control the air outlet position, so as to achieve better heating/cooling effects and improve air supply comfort. For example, in the cooling mode, the air supply fan which causes part of the air flow to the upper part of the accommodating space in the shell can be controlled to be turned on, cold air flows to the upper part under the action of the air supply fan and is blown out forwards through the upper air outlet 12a, and the other air supply fan (the air supply fan which causes part of the air flow to the lower part of the accommodating space in the shell) keeps a closed state, and the cold air is blown out forwards only from the upper air outlet 12a, so that the cold air outlet position is raised, and discomfort to a user caused by direct downward blowing of the cold air is avoided. Because cold air has a sinking trend, the cold air is blown upwards as far as possible, the refrigerating effect is improved, and the influence on the refrigerating experience of a user caused by direct blowing of the cold air on a human body is avoided.
In the heating mode, the air supply fan which causes part of air flow to the lower part of the accommodating space in the shell can be controlled to be started, and the other air supply fan (the air supply fan which causes part of air flow to the upper part of the accommodating space in the shell) is controlled to be closed, so that hot air is blown out forwards only from the lower air outlet 12b, the hot air outlet position is reduced, and the problem that the temperature of the indoor lower space cannot be raised in time due to the rising of hot air is avoided, and the user heating body test is influenced. Because the hot air has an ascending trend, the hot air is blown downwards as much as possible, so that the indoor upper space temperature and the indoor lower space temperature are uniform, and the heating effect and the user heating experience are improved.
The indoor unit 10 further includes a fresh air device 108, and the fresh air device 108 includes a fresh air duct 108a and a fresh air fan 108c. The fresh air duct 108a is communicated with the outdoor environment and extends into the housing, and the fresh air fan 108c is disposed in the housing and connected to and communicated with one end of the fresh air duct 108a extending into the housing, and is configured to promote outdoor ambient air to flow to the heat exchanger 13 through the fresh air duct 108a (the straight arrow in fig. 2 indicates the flow direction of the outdoor ambient air entering the indoor unit 10), so that the outdoor ambient air enters the housing to exchange heat with the heat exchanger 13, thereby realizing convection exchange between indoor and outdoor air and keeping the indoor air clean.
In some embodiments, the number of air intake areas 11a may be two, and two air intake areas 11a may be formed on both lateral sides of the housing, with the lateral direction (also referred to as the left-right direction) being the direction indicated in fig. 2. The two heat exchangers 13 are in one-to-one correspondence with the two air inlet areas 11a, and are respectively arranged inside the corresponding air inlet areas 11a in the shell so as to perform heat exchange with the ambient air entering through the corresponding air inlet areas 11 a.
In one embodiment, as shown in fig. 4, the fresh air device 108 is one, the fresh air fan 108c of the fresh air device 108 may be a centrifugal fan, the fresh air duct 108a of one fresh air device 108 extends into the housing adjacent to one of the heat exchangers 13, and the fresh air fan 108c is configured to promote the flow of outdoor ambient air through the fresh air duct 108a toward the adjacent heat exchanger 13, such that the outdoor ambient air enters the housing to exchange heat with the adjacent heat exchanger 13.
In another embodiment, the two fresh air devices 108 are two, the two fresh air devices 108 are in one-to-one correspondence with the two heat exchangers 13, the two fresh air fans 108c of the two fresh air devices 108 are centrifugal fans, the two fresh air pipes 108a of the two fresh air devices 108 respectively extend into the housing and are adjacent to the corresponding heat exchangers 13, and the two fresh air fans 108c are respectively configured to promote the outdoor ambient air to flow to the corresponding heat exchangers 13 through the corresponding fresh air pipes 108a, so that the outdoor ambient air enters the housing to exchange heat with the corresponding heat exchangers 13.
As shown in fig. 1 to 3, one of the two fresh air ducts 108a of the two fresh air devices 108 extends into the housing from an upper end of one lateral side of the housing (one fresh air duct 108a is exemplarily shown in fig. 1 to 3 to extend into the housing from an upper end of the left side of the housing), and an air outlet end of the fresh air fan 108c of the fresh air device 108 faces the heat exchanger 13 located on the same side in the housing, and outdoor air is blown toward the heat exchanger 13. Another one of the fresh air ducts 108a extends into the housing from the lower end of the other lateral side of the housing (another fresh air duct 108a extends into the housing from the lower end of the right lateral side of the housing is exemplarily shown in fig. 1 to 3), and the air outlet end of the fresh air fan 108c of the fresh air device 108 faces the heat exchanger 13 located on the same side in the housing, and outdoor air is blown toward the heat exchanger 13. The outdoor air introduced into the casing by the two fresh air devices 108 and the indoor air introduced into the casing by the air inlet area 11a are guided to the corresponding air outlets (the upper air outlet 12a or the lower air outlet 12 b) of the indoor unit 10 after exchanging heat with the corresponding heat exchangers 13, and are blown forward to the indoor.
In some embodiments, as shown in fig. 4, the fresh air device 108 further includes a purifying module 108b, and the purifying module 108b is disposed on the air intake path between the fresh air duct 108a and the fresh air fan 108c to purify the outdoor ambient air entering the housing, so as to improve the indoor ambient quality.
In some embodiments, the two air intake areas 11a are symmetrically distributed with respect to the longitudinal center line of the casing, so as to further enhance the aesthetic appearance of the indoor unit 10. The projection of the heat exchanger 13 on the vertical plane bearing the air conditioner indoor unit 10 is arc-shaped to be matched with the corresponding air inlet area 11a, so that the air inlet area is increased, the air inlet resistance is reduced, and the heat exchange efficiency of the heat exchanger 13 is improved. The circle centers of the arc-shaped heat exchangers 13 can coincide with the circle centers of the shell, the two heat exchangers 13 are symmetrically distributed relative to the vertical center line of the shell, the size of the heat exchangers 13 is ensured, and sufficient residual space can be provided for the arrangement of an air supply fan and other components in the shell.
In some embodiments, the maximum value of the lateral distance between the heat exchanger 13 and the corresponding air inlet area 11a is 30 to 40 mm, and the size of the heat exchanger 13 is enough to cover the position opposite to the air inlet area 11a, so as to ensure the heat exchange efficiency of the heat exchanger 13.
In some embodiments, the housing includes a rear case 11 with an open front side and a front panel 12 disposed on the front side of the rear case 11 to form an accommodating space with the rear case 11, and accordingly, the rear case 11 and the front panel 12 are both circular in projection on a vertical plane carrying the indoor unit 10. The rear case 11 is formed with the air inlet region 11a, the upper air outlet 12a is formed at the upper portion of the front panel 12, and the lower air outlet 12b is formed at the lower portion of the front panel 12.
In some embodiments, the diameter of the upper air outlet 12a is equal to the diameter of the lower air outlet 12b, and the ratio of the diameter of the upper air outlet 12a to the diameter of the housing is in the range of 0.2:1 to 0.3:1, for example, the ratio of the diameter size of the upper air outlet 12a to the diameter size of the housing is 0.26. In some embodiments, the upper air outlet 12a and the lower air outlet 12b are symmetrically distributed with respect to the lateral center line of the casing, and by designing the upper air outlet 12a and the lower air outlet 12b to be circular and designing the upper air outlet 12a and the lower air outlet 12b to be symmetrically distributed, the aesthetic standard of the public is met, and the aesthetic property and the coordination of the indoor unit 10 are further increased.
In some embodiments, the ratio of the distance dimension of the center point of the upper air outlet 12a to the center point of the lower air outlet 12b to the diameter dimension of the housing ranges from 0.6:1 to 0.75:1, for example, the ratio of the distance dimension of the center point of the upper air outlet 12a to the center point of the lower air outlet 12b to the diameter dimension of the housing is 0.66. The positions and dimensions of the upper air outlet 12a and the lower air outlet 12b are designed in such a way that the dimensions and positions of the upper air outlet 12a and the lower air outlet 12b can be more harmoniously matched with the overall dimensions of the front panel 12, thereby further increasing the aesthetic appearance and coordination of the indoor unit 10.
In some embodiments, as shown in fig. 2, the indoor unit 10 further includes a water tray 16, where the water tray 16 is located at the bottom of the heat exchanger 13 in the accommodating space inside the housing, for receiving condensed water formed by the heat exchanger 13. In the scheme of two heat exchangers 13, two water receiving discs 16 are arranged, the two water receiving discs 16 are in one-to-one correspondence with the two heat exchangers 13, and are respectively positioned at the bottoms of the corresponding heat exchangers 13. A drain port (not shown) is formed at the bottom of each of the drip trays 16, and is connected to a drain pipe through which condensed water received in the drip tray 16 is drained.
Referring again to fig. 2 and 3, in some embodiments, both supply fans of the indoor unit 10 are centrifugal fans or both axial fans (not shown), wherein the centrifugal fans may be single suction centrifugal fans 14 or double suction centrifugal fans (not shown). The rotation axis of the centrifugal fan should extend in the lateral direction, and the vertical plane carrying the air conditioning indoor unit 10 refers to a plane in which the air conditioning indoor unit 10 is vertically suspended on a vertical wall, and if the air conditioning indoor unit 10 itself is taken as a reference, the projection of the housing of the air conditioning indoor unit 10 on the plane parallel to the rotation axis of the centrifugal fan should be circular.
As shown in fig. 2 and 3, for the solution that the two air supply fans are single-suction centrifugal fans 14, it is preferable that one air inlet area 11a is formed on each of two lateral sides of the housing, the rotating shafts of the two single-suction centrifugal fans 14 extend laterally, the two single-suction centrifugal fans 14 are located on two lateral sides of the vertical center line of the housing, the fan air inlet 14a of one single-suction centrifugal fan 14 faces the air inlet area 11a located on the same side as the single-suction centrifugal fan 14, and the fan air inlet 14a of the other single-suction centrifugal fan 14 faces the air inlet area 11a located on the same side as the single-suction centrifugal fan 14, that is, the fan air inlets 14a of the two single-suction centrifugal fans 14 face opposite to each other, that is, face the corresponding air inlet areas 11a, so as to promote ambient air around the indoor unit 10 to enter the housing through the corresponding air inlet areas 11 a.
The fan outlet 14b of one of the single suction centrifugal fans 14 is upward, the fan outlet 14b of the other single suction centrifugal fan 14 is downward, and the single suction centrifugal fan 14 with the fan outlet 14b upward is configured to cause a part of the air flow to enter the housing through the air inlet region 11a corresponding to the single suction centrifugal fan 14, exchange heat with the corresponding heat exchanger 13, and flow toward the upper portion of the accommodating space so that the part of the air flow is blown out from the upper air outlet 12 a. The downward single suction centrifugal fan 14 of the fan air outlet 14b is configured to cause a part of the air to flow through the air inlet region 11a corresponding to the single suction centrifugal fan 14 into the housing, exchange heat with the corresponding heat exchanger 13, and flow toward the lower portion of the accommodating space, so that the part of the air is blown out from the lower air outlet 12b, and the air is blown out from both the upper air outlet 12a and the lower air outlet 12 b.
In some embodiments, as shown in fig. 2 and 3, to guide the air flow to the upper air outlet 12a and the lower air outlet 12b, respectively, the indoor unit 10 further includes two air guide hoods 15 corresponding to the two single suction centrifugal fans 14 one by one, the air guide hoods 15 being configured to guide the air flow of the fan air outlets 14b of the corresponding single suction centrifugal fans 14 to the corresponding air outlets, that is, the air guide hoods 15 corresponding to the single suction centrifugal fans 14 with the fan air outlets 14b upward guide the air flow of the fan air outlets 14b of the single suction centrifugal fans 14 to the upper air outlet 12a so that the air flow is blown out forward from the upper air outlet 12 a; the air guide cover 15 corresponding to the single suction centrifugal fan 14 with the fan outlet 14b facing downward guides the air flow of the fan outlet 14b of the single suction centrifugal fan 14 to the lower outlet 12b so that the air flow is blown out forward from the lower outlet 12 b.
Fig. 5 is a schematic structural view of a pod 15 of the air conditioning indoor unit 10 according to one embodiment of the present invention.
In some embodiments, as shown in fig. 5, each of the fairings 15 has a wind collecting chamber communicating with the fan outlet 14b of the corresponding single suction centrifugal fan 14 and a wind guiding duct communicating with the wind collecting chamber, and a wind guiding outlet 15b opposite to the corresponding outlet (the upper outlet 12a or the lower outlet 12 b) is formed at a front side of the wind guiding duct to guide the air flow to the corresponding outlet.
In some embodiments, as shown in fig. 6, the pod 15 includes a horizontal wall 151 extending front and back, a curved wall 152, a front sidewall 153, a rear sidewall (not identified), and an arcuate dividing wall 154. Wherein, the horizontal wall 151 is formed with a diversion air inlet 15a communicated with a fan air outlet 14b of the corresponding single suction centrifugal fan 14, one end of the curved wall 152 in the circumferential direction is connected with one end of the horizontal wall 151 in the transverse direction, and the other end of the curved wall 152 in the circumferential direction is connected with the other end of the horizontal wall 151 in the transverse direction, so as to define a cavity with the horizontal wall 151; the front side wall 153 connects the front side of the horizontal wall 151 and the front side of the curved wall 152, closes the front side of the pod 15 to close the front side of the cavity, and the rear side wall connects the rear side of the horizontal wall 151 and the rear side of the curved wall 152, closes the rear side of the pod 15 to close the rear side of the cavity; an arc-shaped partition wall 154 is formed in the cavity to divide the cavity into the aforementioned wind collecting chamber and the diversion tunnel, the arc-shaped partition wall 154 is formed with an opening communicating the wind collecting chamber and the diversion tunnel, and the front sidewall 153 is formed with the aforementioned diversion air outlet 15b opposite to the diversion tunnel. The air guide sleeve 15 formed by the method is provided with an air collecting cavity, and air flow flowing out from the fan air outlet 14b of the single-suction centrifugal fan 14 enters the air collecting cavity of the air guide sleeve 15 and is mixed in the air collecting cavity, so that the air outlet uniformity is ensured; and, utilize the above-mentioned special shape kuppe 15 to cooperate with the centrifugal fan 14 of single inhaling, realize smooth transition air supply, can reduce the air current loss, reduce the turbulent flow to improve air supply efficiency and noise reduction.
In some embodiments, as shown in fig. 3, the air guiding duct defined by the curved partition wall 154 and the curved wall 152 is preferably in a cylindrical structure, that is, the portion of the curved wall 152 opposite to the curved partition wall 154 forms a circular arc shape with the curved partition wall 154, so that the air guiding duct defined by the cylindrical structure matches with the shape of the corresponding circular air outlet, and the air flow of the air guiding duct is blown out directly forward through the corresponding air outlet, so that the smoothness of air flow conveying is improved, the air flow loss is reduced, and the air supply efficiency is further improved.
It will be appreciated that the single suction centrifugal fan 14 generally includes a volute 141 having a chamber and an impeller (not shown) disposed in the chamber, the chamber in this embodiment should extend laterally, the chamber has a fan inlet 14a, the volute 141 has a fan outlet 14b in communication with the chamber, and the impeller is rotatable about a lateral axis relative to the volute 141.
In some embodiments, in order to reduce the overall size of the indoor unit 10, two efficient centrifugal fans are required to supply air, so as to improve the performance requirements on the basis of meeting the external dimensions of the indoor unit 10. According to the pressure loss of the centrifugal fan, by means of simulation analysis, the present embodiment preferably adopts two single-suction type backward centrifugal fans as the two air supply fans of the present embodiment, and the backward centrifugal fans refer to centrifugal fans with blade-mounted air outlets smaller than 90 °.
In this embodiment, the blade mounting outlet angle βb2 of the impeller of each single suction type backward centrifugal fan satisfies 30 ° or more and βb2 or less than 40 °, for example, the blade mounting outlet angle βb2 of each single suction type backward centrifugal fan is 35 °. The specific rotation speed ns of each single-suction type backward centrifugal fan is 58-ns-60, for example, the specific rotation speed ns of each single-suction type backward centrifugal fan is 59.48. The peripheral speed u2 of each single suction type backward centrifugal fan is 11.ltoreq.u2.ltoreq.12 m/s, for example, the peripheral speed u2 of each single suction type backward centrifugal fan is 11.83 m/s. The full pressure coefficient ψ of each single suction type backward centrifugal fan satisfies 0.7.ltoreq.ψ.ltoreq.0.9, for example, the full pressure coefficient ψ of each single suction type backward centrifugal fan is 0.88.
As described above, by adopting the single suction type backward centrifugal fan as the blower fan of the present embodiment, the blower efficiency is higher than that of the forward centrifugal fan, and the single suction type backward centrifugal fan can alleviate the degree of non-uniformity caused by the difference in the air flow speed due to the difference in the speed of the air flow caused by the centrifugal force due to the curve She Daoliu of the air flow passing through the blower fan. In addition, by limiting the installation outlet angle beta b2, the specific rotation speed ns, the circumferential speed u2 and the full pressure coefficient ψ of the single suction type backward centrifugal fan to the above-described specific numerical ranges, the pressure loss of the single suction type backward centrifugal fan can be reduced, and the air intake of the single suction type backward centrifugal fan can be improved. Meanwhile, on the premise of ensuring the better performance of the single-suction type backward centrifugal fans, the size of each single-suction type backward centrifugal fan can be adjusted to be lower, for example, each single-suction type backward centrifugal fan meets the following conditions: phi 120 x 80mm, i.e. the diameter of the volute is 120 mm and the thickness is 80 mm.
This ensures that the overall size of the indoor unit 10 can be adjusted to a low size, for example, the overall size of the casing is Φ500×200mm, that is, the diameter size of the casing is 500 mm, and the thickness size is 220 mm. The diameter sizes of the upper air outlet 12a and the lower air outlet 12b can be 120 mm, so that the overall size of the indoor unit 10 is reduced on the premise of ensuring the air supply performance of the indoor unit 10, and the miniaturized appearance requirement of a user on the indoor unit 10 of the air conditioner is met.
Fig. 6 is a schematic structural view of one direction of the outlet duct 18 of the air conditioning indoor unit 10 according to one embodiment of the present invention, and fig. 7 is a schematic sectional view of the outlet duct 18 of the air conditioning indoor unit 10 according to one embodiment of the present invention.
In some embodiments, referring again to fig. 2 and 3, and referring to fig. 6, the indoor unit 10 further includes two air outlet pipes 18 extending back and forth and distributed up and down in the accommodating space, the air outlet pipe 18 located above corresponds to the air guide cover 15 located above, and the air outlet pipe 18 located below corresponds to the air guide cover 15 located below.
Each air outlet pipe 18 comprises an outer pipe 181 extending front and back and a first inner pipe 182 connected to the inner peripheral wall of the outer pipe 181 and extending from back to front in a gradually expanding manner to protrude out of the front side of the outer pipe 181, and the air inlet end of the outer pipe 181 passes through the air guide outlet 15b of the corresponding air guide cover 15 and is positioned in the corresponding air guide duct, so that heat exchange air flows from the air guide duct into the corresponding air outlet pipe 18 through the air inlet end of the outer pipe 181. The air inlet end of the first inner tube 182 is located at a position, close to the front end of the outer tube 181, in the outer tube 181, the air outlet end of the first inner tube 182 protrudes out of the front side of the corresponding air outlet, and a first interval space 103 is formed between the inner peripheral wall of the outer tube 181 and the outer peripheral wall of the first inner tube 182, that is, the first inner tube 182 is in a horn-shaped structure from back to front, the outer tube 181 and the first inner tube 182 form a return tube, part of heat exchange air flow can flow forwards through the inner space of the first inner tube 182, and part of heat exchange air flow can flow forwards through the first interval space 103. Thereby increasing the air outlet range and realizing better air supply effect.
In some embodiments, each air outlet pipe 18 further includes a second inner pipe 183, the second inner pipe 183 extends from back to front in the corresponding first inner pipe 182 in a diverging manner, and a second spacing space 104 is formed between an outer peripheral wall of the second inner pipe 183 and an inner peripheral wall of the corresponding first inner pipe 182. The heat exchange air flowing toward the upper part of the housing accommodating space enters the outer tube 181 and is divided into three parts, part of the heat exchange air is blown out forward through the space in the second inner tube 183, part of the heat exchange air is blown out forward through the first spacing space 103, and part of the heat exchange air is blown out forward through the second spacing space 104; the heat exchange wind flowing toward the lower portion of the housing accommodating space enters the outer tube 181 and is equally divided into three portions and blown out toward the front side. Therefore, the air flow is blown forward more dispersedly, and the air supply uniformity and the comfort are further improved.
In this embodiment, by designing each air outlet pipe 18 to have a shape of a circle as described above, the air outlet range can be enlarged, and the wide area air supply effect can be achieved; and the heat exchange air flow is diffused to the periphery of the front side of the air outlet corresponding to the indoor unit 10, and the surrounding air is sucked forward, so that the air supply uniformity is further improved, the air is softer and more natural, and the user can feel cool and not cool when blowing on the human body, and the comfort of the user is improved.
The first inner tube 182 is connected to the inner peripheral wall of the outer tube 181 by a bracket (not shown in fig. 7), and the second inner tube is connected to the inner peripheral wall of the first inner tube 182 by another bracket (not shown in fig. 7), which serves to fix the first inner tube 182 and the second inner tube 183, and is small in size, avoiding blocking the forward flow of the air flow. For example, the outer peripheral wall of the first inner tube 182 is provided with a plurality of first connecting rods (not shown) at intervals in the circumferential direction, which constitute the aforementioned bracket, and the first inner tube 182 is fixed to the outer tube by the plurality of first connecting rods at intervals. Accordingly, a plurality of second connecting rods (not shown) constituting the aforementioned other bracket are distributed to the outer peripheral wall of the second inner tube 183, and the second inner tube 183 is fixed to the first inner tube 182 by the plurality of second connecting rods distributed at intervals.
In some embodiments, each of the air outlet pipes 18 is configured to controllably move in the front-rear direction between a position protruding from the front side of the air outlet of the corresponding indoor unit 10 and a position retracted into the air outlet of the corresponding indoor unit 10, that is, the air outlet pipe 18 located above is configured to controllably move in the front-rear direction between a position protruding from the front side of the upper air outlet 12a and a position retracted into the upper air outlet 12a, and the air outlet pipe 18 located below is configured to controllably move in the front-rear direction between a position protruding from the front side of the lower air outlet 12b and a position retracted into the lower air outlet 12 b.
Specifically, when the air outlet duct 18 is controlled to retract rearward to a position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner tube 182 abuts against the corresponding air outlet inner peripheral wall to close the first spacing space 103, so that a part of the air flow is blown out from the second inner tube 183 toward the front side, and a part of the air flow is blown out from the second spacing space 104 toward the front side. That is, when the upper air outlet duct 18 is controlled to retract to the position in the upper air outlet 12a, the outer peripheral wall of the air outlet end of the first inner tube 182 of the air outlet duct 18 abuts against the inner peripheral wall of the upper air outlet 12a, and a part of the air flow flowing toward the upper portion of the housing accommodating space is blown out forward from the second inner tube 183 of the upper air outlet duct 18, and a part of the air flow is blown out forward from the second compartment 104; when the lower air outlet duct 18 is retracted to the position in the lower air outlet 12b, the outer peripheral wall of the air outlet end of the first inner tube 182 of the air outlet duct 18 abuts against the inner peripheral wall of the lower air outlet 12b, and a part of the air flow flowing toward the lower portion of the housing accommodating space is blown forward from the second inner tube 183 of the lower air outlet duct 18, and a part of the air flow is blown forward from the second space 104.
When the air outlet pipe 18 is controlled to move forward to a position protruding from the front side of the corresponding air outlet, the air outlet end of the first inner pipe 182 protrudes from the front side of the corresponding air outlet, and as the first inner pipe 182 is gradually expanded from back to front, it can be understood that the outer diameter of the front section of the first inner pipe 182 is larger than that of the rear section, when the air outlet pipe 18 moves forward, the air outlet end of the first inner pipe 182 is separated from the inner peripheral wall of the corresponding air outlet, and the air outlet end of the first inner pipe 182 protrudes from the front side of the corresponding air outlet, so that the space (the first interval space 103) between the outer wall of the first inner pipe 182 and the inner wall of the outer pipe 181 is exposed, and thus, airflows in the first interval space 103, the second interval space 104 and the second inner pipe 183 are blown forward.
The movement of the two outlet pipes 18 and the states of the two blower fans may be controlled according to the operation mode of the air conditioning indoor unit 10. For example, in the cooling mode, the air outlet pipe 18 corresponding to the upper air outlet 12a is controlled to move to a position protruding from the front side of the upper air outlet 12a, and the air supply fan for forcing part of the air flow to the upper part of the accommodating space in the housing is controlled to be turned on; the air outlet pipe 18 corresponding to the lower air outlet 12b can be kept in the lower air outlet 12b and does not move forward, and accordingly, the air supply fan corresponding to the air outlet pipe (namely, the air supply fan for promoting part of air flow to the lower part of the accommodating space in the shell) keeps a closed state, and cold air is blown forward only through the air outlet pipe 18 positioned at the upper part, so that the cold air outlet position is raised, and discomfort of a user caused by downward direct blowing of the cold air to the user is avoided. Because cold air has a sinking trend, the cold air is blown upwards as far as possible, the refrigerating effect is improved, and the influence on the refrigerating experience of a user caused by direct blowing of the cold air on a human body is avoided. In addition, as the air outlet pipe 18 at the upper part moves forwards to protrude out of the front side of the upper air outlet 12a, the air supply range is enlarged, the air supply uniformity is improved, and the refrigerating comfort experience of a user is further enhanced.
In the heating mode, the air outlet pipe 18 corresponding to the lower air outlet 12b can be controlled to move to a position protruding out of the front side of the lower air outlet 12b, and the air supply fan corresponding to the air outlet pipe (namely, the air supply fan which promotes part of air flow to the lower part of the accommodating space in the shell) is controlled to be turned on, while the air outlet pipe 18 corresponding to the upper air outlet 12a can be kept in the upper air outlet 12a and does not move forward, accordingly, the air supply fan corresponding to the air outlet pipe (namely, the air supply fan which promotes part of air flow to the upper part of the accommodating space in the shell) keeps a closed state, and hot air is blown forward only through the air outlet pipe 18 positioned at the lower part, so that the air outlet position of the hot air is reduced, and the problem that the temperature of the indoor lower space cannot be raised in time due to the upward hot air is avoided, and the user heating body test is affected. Because the hot air has an ascending trend, the hot air is blown downwards as much as possible, so that the indoor upper space temperature and the indoor lower space temperature are uniform, and the heating effect and the user heating experience are improved. In addition, as the air outlet pipe 18 at the lower part moves forwards to protrude out of the front side of the lower air outlet 12b, the air supply range is enlarged, the air supply uniformity is improved, and the heating comfort experience of a user is further enhanced.
In this embodiment, referring again to fig. 2 and 3, the air conditioning indoor unit 10 further includes an electric control board 17, the electric control board 17 is disposed between the two air supply fans, the electric control board 17 is configured to control the operation of the two air supply fans, and in some embodiments, the electric control board 17 further controls the movement of the two air outlet pipes 18. By arranging the electric control board 17 in the space between the two air supply fans, the arrangement of all the components in the shell is compact and orderly, and the overall size of the indoor unit 10 is further reduced.
In some embodiments, as shown in fig. 7, the inner peripheral wall of the outer tube 181 of each air outlet tube 18 includes a rear wall section 181a and a front wall section 181b that are sequentially connected in a direction from the air inlet end of the outer tube 181 to the air outlet end, the rear wall section 181a is a hollow truncated cone gradually expanding forward from the air inlet end of the outer tube 181, the front wall section 181b is a hollow truncated cone gradually expanding toward the air outlet end of the outer tube 181 from a position connected to the rear wall section 181a, and the taper angle 2e of the rear wall section 181a is larger than the taper angle 2c of the front wall section 181b. It will be understood that the inner peripheral wall of the outer tube 181 is divided into two sections from the rear end to the front end of the outer tube 181, namely a rear wall section 181a and a front wall section 181b, the rear wall section 181a is flared from back to front, the front wall section 181b is flared from back to front, and the rear wall section 181a is flared to a greater extent than the front wall section 181b. As shown in fig. 7, the angle e is the angle between the wall surface of the rear wall section 181a and the horizontal line extending front and back, and the taper angle of the rear wall section 181a is 2e; the angle c is the included angle between the wall surface of the front wall section 181b and the horizontal line extending forwards and backwards, and the taper angle of the front wall section 181b is 2c.
The air inlet end of the first inner tube 182 is located in the space formed by the front wall section 181b, so that a first interval space 103 is formed between the front wall section 181b and the peripheral wall of the first inner tube 182, air flow is ensured to enter the outer tube 181, mixing and carding are performed in the rear wall section 181a of the outer tube 181, and then forward flowing is performed to blow out along different flow paths, so that vortex loss is reduced. The air inlet end of the first inner tube 182 (i.e., the rear end of the first inner tube 182) is spaced from the rear end of the front wall section 181b of the outer tube 181 by approximately the same distance as the front end of the front wall section 181b (i.e., the air outlet end of the outer tube 181).
In some embodiments, as shown in fig. 7, the first inner tube 182 has a hollow truncated cone shape with a uniform wall thickness and gradually expanding from the air inlet end to the air outlet end, and the cone angle 2b of the first inner tube 182 is larger than the cone angle 2c of the front wall section 181b of the outer tube 181, which is also understood as that the first inner tube 182 has a gradually expanding horn shape from the rear end to the front end thereof.
In some embodiments, as shown in fig. 7, the second inner tube 183 of the air outlet pipe 18 extends from back to front in the corresponding first inner tube 182, and it is understood that the second inner tube 183 is entirely disposed in the first inner tube 182, and has a flared shape from back to front, and the peripheral wall of the second inner tube 183 has a truncated cone shape from back to front. The inner circumferential wall of the second inner tube 183 is a truncated cone shape gradually expanding from the air inlet end to the air outlet end of the second inner tube 183, that is, the inner circumferential wall of the second inner tube 183 is a truncated cone shape gradually expanding from back to front. The taper angle 2d of the inner peripheral wall of the second inner tube 183 is larger than the taper angle 2a of the outer peripheral wall of the second inner tube 183, and the taper angle 2a of the outer peripheral wall of the second inner tube is equal to the taper angle 2c of the front wall section 181b of the outer tube 181.
By defining the inner peripheral wall of the outer tube 181 as the above structure, and defining the shapes of the first inner tube 182 and the second inner tube 183 as the above structure, the first space 103 (the space between the outer tube 181 and the first inner tube 182), the second space 104 (the space between the first inner tube 182 and the second inner tube 183), and the space within the second inner tube 183 defined thereby divide the air flow, thereby expanding the air outlet range, and at the same time, further reducing the vortex loss and improving the air supply efficiency; and the air outlet is softer and more uniform.
In some embodiments, the taper angle 2c of the front wall segment 181b satisfies: the taper angle 2e of the rear wall section 181a satisfies 0 ° < 2a=2c+.40°:0 <2 e.ltoreq.50°, for example, the taper angle 2c of the front wall section 181b is 7.8 ° and the taper angle 2e of the rear wall section 181a is 46.2 °. In some embodiments, the taper angle 2b of the first inner tube 182 may satisfy: the taper angle 2d of the inner peripheral wall of the second inner tube 183 may satisfy: 30 ° <2 d. Ltoreq.60°, for example, the taper angle 2b of the first inner tube 182 is 60 °, and the taper angle 2d of the inner peripheral wall of the second inner tube 183 is 45 °. The air outlet pipe 18 thus formed can further reduce the eddy current loss and improve the air supply efficiency.
As shown in fig. 2 and 6, where the racks in fig. 2 are not numbered, the indoor unit 10 of the air conditioner of the present embodiment further includes two driving units, where the two driving units are in one-to-one correspondence with the two air outlet pipes 18, each driving unit may include a rack 102, a gear (not shown), and a motor (not shown) for driving the gear to rotate, where the motor is disposed in the accommodating space of the housing, and the gear is meshed with the rack 102 to drive the corresponding air outlet pipe 18 to move between a position protruding from the front side of the corresponding air outlet and a position retracted into the corresponding air outlet in the front-rear direction.
The length dimension of the tooth segment meshed by the rack 102 and the gear can be equal to or greater than the distance dimension between the air outlet end of the corresponding outer pipe 181 and the air outlet end of the first inner pipe 182, so as to ensure that the air outlet pipe 18 moves forwards to the position that the part of the first inner pipe 182 positioned at the front side of the outer pipe 181 completely extends out of the air outlet corresponding to the indoor unit 10, thereby further increasing the air outlet range and the air supply distance, and improving the air supply efficiency and the air outlet uniformity.
In the solution where both the two air supply fans are single-suction centrifugal fans 14, in one embodiment, referring to fig. 5, the air inlet ends of the two air outlet pipes 18 (i.e. the air inlet ends of the outer pipes 181) may pass through the air guiding outlets 15b of the corresponding air guiding hoods 15 to be located in the air guiding channels, and the air inlet ends of the air outlet pipes 18 are in sliding contact with the corresponding air guiding channels. In the process of the front-back movement of the air outlet pipe 18, the rear part section of the air outlet pipe 18 is always positioned in the guide air channel of the corresponding guide cover 15. It will be appreciated that the size of the air outlet pipe 18, the size of the air guide duct, and the size of the opening formed by the arcuate partition wall 154 that communicates the air collecting chamber with the air guide duct ensure that the heat exchanging air can enter the air guide duct through the air collecting chamber when the air outlet pipe 18 moves forward or backward.
In some implementations of the present embodiment, the racks 102 may be formed at the outer peripheral wall of the corresponding air outlet duct 18, extending from front to rear. The two air guide channels of the two air guide covers 15 are formed with notches (not shown) which are matched with the racks 102 on the corresponding air outlet pipes 18 and extend forwards and backwards, the racks 102 penetrate through the notches 15c to enable teeth of the racks 102 to be exposed out of the air guide channels of the air guide covers 15 so as to be meshed with corresponding gears, so that the air outlet pipes 18 can move forwards and backwards, the sealing performance of the air guide channels is kept, the length of the racks 102 is enough to extend to the rear sides of the air guide channels along the corresponding notches 15c, and therefore when the air outlet pipes 18 move forwards, the notches 15c of the air guide channels are always covered by the racks 102, and the sealing performance of the air guide channels is guaranteed.
By now it should be appreciated by those skilled in the art that while a number of exemplary embodiments of the invention have been shown and described herein in detail, many other variations or modifications of the invention consistent with the principles of the invention may be directly ascertained or inferred from the present disclosure without departing from the spirit and scope of the invention. Accordingly, the scope of the present invention should be understood and deemed to cover all such other variations or modifications.

Claims (8)

1. An indoor unit of an air conditioner, comprising:
the shell is provided with an air inlet area, an upper air outlet positioned at the upper part of the front side of the shell and a lower air outlet positioned at the lower part of the front side of the shell;
the heat exchanger is arranged on the inner side of the air inlet area in the shell so as to exchange heat with indoor environment air entering through the air inlet area;
fresh air device includes:
the new air pipe is communicated with the outdoor environment and extends into the shell;
the fresh air fan is arranged in the shell and is connected and communicated with one end of the fresh air pipe extending into the shell and is configured to promote outdoor ambient air to flow to the heat exchanger through the fresh air pipe so that the outdoor ambient air enters the shell to exchange heat with the heat exchanger;
The indoor unit of the air conditioner further comprises:
two air supply fans arranged in the accommodating space inside the shell, wherein one air supply fan is configured to promote part of air flow after heat exchange with the heat exchanger to flow to the upper part of the accommodating space so as to blow out the part of air flow from the upper air outlet, and the other air supply fan is configured to promote part of air flow after heat exchange with the heat exchanger to flow to the lower part of the accommodating space so as to blow out the part of air flow from the lower air outlet; the upper air outlet and the lower air outlet are recorded as two air outlets of the air conditioner indoor unit;
the two air supply fans are centrifugal fans, the centrifugal fans which cause part of air to flow to the upper part of the accommodating space are provided with upward fan air outlets, and the centrifugal fans which cause the other part of air to flow to the lower part of the accommodating space are provided with downward fan air outlets;
the indoor unit of the air conditioner further comprises two air guide covers which are in one-to-one correspondence with the two centrifugal fans, each air guide cover is provided with an air collecting cavity communicated with the corresponding fan air outlet of the centrifugal fan and an air guide channel communicated with the air collecting cavity, and the front side of the air guide channel is provided with an air guide air outlet opposite to the corresponding air outlet so as to guide air flow to the corresponding air outlet;
The indoor unit of the air conditioner further comprises:
the two air outlet pipes extend forwards and backwards and are distributed in the accommodating space up and down, the air outlet pipe positioned above corresponds to the air guide sleeve positioned above, and the air outlet pipe positioned below corresponds to the air guide sleeve positioned below;
each air outlet pipe comprises an outer pipe extending forwards and backwards and a first inner pipe connected to the inner peripheral wall of the outer pipe and extending from back to front in a gradually expanding manner to protrude out of the front side of the outer pipe, and the air inlet end of the outer pipe penetrates through the corresponding air guide outlet of the air guide cover and is positioned in the corresponding air guide duct so that air flow enters the corresponding air outlet pipe;
the first inner pipe air inlet end is located at a position, close to the front end of the outer pipe, in the outer pipe, the first inner pipe air outlet end protrudes out of the front side of the corresponding air outlet, and a first interval space is formed between the inner peripheral wall of the outer pipe and the outer peripheral wall of the first inner pipe, so that air flows through.
2. The indoor unit of claim 1, wherein
The two air inlet areas are formed on two lateral sides of the shell and are distributed relatively;
the two heat exchangers are in one-to-one correspondence with the two air inlet areas, and are respectively arranged on the inner sides of the corresponding air inlet areas in the shell so as to perform heat exchange with ambient air entering through the corresponding air inlet areas, thereby forming heat exchange airflow.
3. The indoor unit of claim 2, wherein
The fresh air device is one, and the fresh air fan of the fresh air device is a centrifugal fan;
the fresh air pipe of one fresh air device extends to the position, close to one of the heat exchangers, in the shell, and the fresh air fan is configured to enable outdoor environment air to flow to the position, close to the heat exchanger, of the fresh air device through the fresh air pipe, so that the outdoor environment air enters the shell to exchange heat with the position, close to the heat exchanger, of the shell.
4. The indoor unit of claim 2, wherein
The two fresh air devices are in one-to-one correspondence with the two heat exchangers, and the two fresh air fans of the two fresh air devices are centrifugal fans;
the two fresh air pipes of the two fresh air devices extend into the shell respectively and are close to the corresponding heat exchangers, and the two fresh air fans are respectively configured to enable outdoor ambient air to flow to the corresponding heat exchangers through the corresponding fresh air pipes so that the outdoor ambient air enters the shell to exchange heat with the corresponding heat exchangers.
5. The air conditioning indoor unit according to any one of claims 1 to 4, wherein
The fresh air device further comprises a purification module, wherein the purification module is arranged on an air inlet path between the fresh air pipe and the fresh air fan, so as to purify outdoor ambient air entering the shell.
6. The indoor unit of claim 1, wherein
Each air outlet pipe further comprises a second inner pipe, the second inner pipe gradually expands from back to front in the corresponding first inner pipe, and a second interval space is formed between the outer peripheral wall of the second inner pipe and the inner peripheral wall of the corresponding first inner pipe so that air flows pass through.
7. The indoor unit of claim 6, wherein
Each air outlet pipe is configured to controllably move along the front-rear direction between a position protruding out of the front side of the corresponding air outlet and a position retracted back to the corresponding air outlet;
when the air outlet pipe is retracted to the position in the corresponding air outlet, the outer peripheral wall of the air outlet end of the first inner pipe is abutted with the inner peripheral wall of the corresponding air outlet so as to seal the first interval space, and air flows are blown out of the second interval space and the second inner pipe to the front side respectively;
when the air outlet pipe is positioned at a position protruding from the front side of the corresponding air outlet, the air outlet end of the first inner pipe protrudes from the front side of the corresponding air outlet so as to expose the first interval space, so that air flows are blown out of the first interval space, the second interval space and the second inner pipe to the front side respectively.
8. The indoor unit of claim 2, wherein
The shell comprises a rear shell with an open front side and a front panel positioned at the front side of the rear shell and forming an accommodating space with the rear shell;
the two air inlet areas are formed on two lateral sides of the rear shell, the upper air outlet and the lower air outlet are formed on the front panel and are respectively positioned on the upper part of the front panel and the lower part of the front panel.
CN201810942138.1A 2018-08-17 2018-08-17 Indoor unit of air conditioner Active CN110864362B (en)

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CN102748810A (en) * 2012-05-30 2012-10-24 广东美的制冷设备有限公司 Air conditioner indoor unit capable of supplying air up and down and control method thereof
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