CN113983550B - Fresh air device and air conditioner of machine in air conditioning - Google Patents
Fresh air device and air conditioner of machine in air conditioning Download PDFInfo
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- CN113983550B CN113983550B CN202111162568.XA CN202111162568A CN113983550B CN 113983550 B CN113983550 B CN 113983550B CN 202111162568 A CN202111162568 A CN 202111162568A CN 113983550 B CN113983550 B CN 113983550B
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- 238000004378 air conditioning Methods 0.000 title claims description 8
- 230000030279 gene silencing Effects 0.000 claims description 16
- 238000009423 ventilation Methods 0.000 claims description 9
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000903 blocking effect Effects 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000000694 effects Effects 0.000 description 5
- 239000007789 gas Substances 0.000 description 5
- 238000001914 filtration Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 231100000331 toxic Toxicity 0.000 description 2
- 230000002588 toxic effect Effects 0.000 description 2
- 230000006866 deterioration Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003584 silencer Effects 0.000 description 1
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Classifications
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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
- F24F1/0035—Indoor units, e.g. fan coil units characterised by introduction of outside air to the room
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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
- F24F1/0018—Indoor units, e.g. fan coil units characterised by fans
- F24F1/0022—Centrifugal or radial fans
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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
- F24F1/0018—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
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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
- F24F1/0071—Indoor units, e.g. fan coil units with means for purifying supplied air
- F24F1/0073—Indoor units, e.g. fan coil units with means for purifying supplied air characterised by the mounting or arrangement of filters
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/08—Air-flow control members, e.g. louvres, grilles, flaps or guide plates
- F24F13/10—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers
- F24F13/14—Air-flow control members, e.g. louvres, grilles, flaps or guide plates movable, e.g. dampers built up of tilting members, e.g. louvre
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/28—Arrangement or mounting of filters
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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
- F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
- F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
- F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structures Of Non-Positive Displacement Pumps (AREA)
Abstract
The invention discloses a fresh air device of an indoor unit of an air conditioner and the air conditioner. The new trend device includes: establish first fan section, second air inlet section and the second fan section that forms new trend air supply flow path in proper order series connection, first fan section includes: the first volute, a first fan arranged in the first volute and a damper assembly arranged at the inlet of the first fan; the second fan segment includes: a second volute and a second fan disposed within the second volute; the second air inlet section includes: and the second air inlet cavity shell is provided with a second air inlet cavity inlet connected with the first volute outlet and a second air inlet cavity outlet connected with the second volute inlet.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a fresh air device of an indoor unit of an air conditioner and the air conditioner.
Background
People's attention to fresh air promotes gradually, and health consciousness strengthens gradually, promotes by a wide margin to the attention of the healthy class air conditioner that has the new trend function. The fresh air system of the air conditioner is mainly divided into two types of one-way fresh air and two-way fresh air, the one-way fresh air fan only has an air supply function or an air exhaust function, the two-way fresh air fan has the air supply function and the air exhaust function, and the one-way fresh air system is widely adopted by various manufacturers.
At present, a plurality of air conditioner manufacturers are dedicated to improving the air volume of fresh air of an air conditioner. The air volume of the fresh air of the air conditioner is used as an important index of the performance of a fresh air fan, and represents the capability of the air conditioner to dilute toxic and harmful gases in a room and discharge the toxic and harmful gases to the air in the room.
Research shows that the performance of the fresh air fan cannot be fully exerted due to the fact that the air inlet resistance of the fresh air fan of the air conditioner is large. Taking a fresh air inlet pipe connected to a wall-mounted indoor unit air conditioner as an example, many manufacturers adopt an air inlet pipe with the length of 1m and the inner diameter of 40mm to obtain larger fresh air volume, but if a user wants to adopt an air inlet pipe with the inner diameter of 40mm, the air conditioning holes reserved in a house need to be subjected to hole expanding treatment. If the hole expanding treatment is not carried out, the new air quantity of the air inlet pipe with the inner diameter of 30mm is 55 percent less than that of the air inlet pipe with the inner diameter of 40mm according to the influence result of the fresh air pipe diameter on the new air quantity. Therefore, if the user chooses not to perform reaming treatment on the reserved air conditioning hole, the user cannot enjoy large fresh air volume. The fresh air device of the existing air-conditioning indoor unit, such as CN211146686U, CN209181235U, CN108507013A, adopts a single fan structure, so that the capacity of the fresh air fan for overcoming air inlet resistance is limited, and the performance of the fan is seriously influenced by the diameter of an air inlet pipe.
Disclosure of Invention
In view of this, the invention discloses a fresh air device of an air conditioner indoor unit and an air conditioner, which are used for at least solving the problem of insufficient air supply of the fresh air device of the air conditioner.
In order to achieve the above object, the invention adopts the following technical scheme:
the invention discloses a fresh air device of an indoor unit of an air conditioner, which comprises: a first fan section, a second air inlet section and a second fan section which are sequentially connected in series to form a fresh air supply flow path,
the first fan segment includes: the first volute, a first fan arranged in the first volute and a damper assembly arranged at the inlet of the first fan;
the second fan segment includes: a second volute and a second fan disposed within the second volute;
the second air inlet section includes: and the second air inlet cavity shell is provided with a second air inlet cavity inlet connected with the first volute outlet and a second air inlet cavity outlet connected with the second volute inlet.
Further optionally, the damper assembly comprises:
the first fan air door is fixed on the inlet side of the first fan, and a first air hole correspondingly communicated with the inlet of the first fan is formed in the first fan air door;
the first fan air door baffle is rotatably arranged on the first fan air door, and the first fan air door baffle is provided with a closing position capable of closing and blocking the first air hole and an opening position capable of opening the first air hole on a rotating path;
when the first fan air door baffle is in a closed position, fresh air enters the second air inlet section through a bypass formed by bypassing the first fan in the first volute; when the first fan air door baffle is in the opening position, fresh air enters the second air inlet section in the first volute through two paths, namely the first fan interior and the bypass.
Further optionally, the first volute employs a cylindrical housing,
the cylindric casing with first fan coaxial setting, just be formed with between the internal perisporium of cylindric casing and the periphery of first fan and predetermine the ventilation gap in order to be regarded as the bypass makes the new trend flow direction the second air inlet section.
Further optionally, the first fan air door is fixed to the first volute, and a second air hole correspondingly communicated with the preset ventilation gap is formed in the first fan air door.
Further optionally, the first fan air door adopts a circular plate-shaped structure corresponding to the cylindrical shell, a plurality of support arms distributed around the circumference of the first fan air door are further formed on the first fan air door, and the plurality of support arms are connected with the first volute.
Further optionally, the first fan segment further comprises: a first fan support plate fixing the first fan,
the first fan support plate is connected with the first volute, and a third air hole for fresh air to flow to the second air inlet section is formed between the first fan support plate and the inner peripheral wall of the first volute in a matched mode.
Further optionally, the fresh air device further comprises: and the resonance silencing cavity is arranged in the second air inlet cavity shell.
Further optionally, the second air intake section further comprises: the silencing plate is arranged in the second air inlet cavity shell,
the muffling plate is provided with muffling holes penetrating through two sides of the plate body, and the muffling plate is matched with the first fan support plate to form the resonance muffling cavity to muffle the fresh air device.
Further optionally, the first fan supporting plate is of a circular plate-shaped structure, and the silencer plate is of a curved plate shell structure covering the first fan supporting plate.
Further optionally, the fresh air device further comprises: the first air inlet section is provided with a first air inlet section,
the first air inlet section includes: the first air inlet cavity shell forms an air inlet of the fresh air device and a first air inlet cavity shell outlet connected with the first volute inlet.
Further optionally, the first air intake section further comprises:
the filter screen is arranged in the first air inlet cavity shell;
and the filter screen bracket is arranged in the first air inlet cavity shell and used for fixing the filter screen.
Further optionally, the first fan is a centrifugal fan, and/or the second fan is a centrifugal fan.
Further optionally, the damper assembly comprises:
the first fan air door is fixed on the inlet side of the first fan, and a first air hole correspondingly communicated with the inlet of the first fan is formed in the first fan air door;
the first fan air door baffle is rotatably arranged on the first fan air door, and the first fan air door baffle is provided with a closing position capable of closing and blocking the first air hole and an opening position capable of opening the first air hole on a rotating path;
the first volute adopts a cylindrical shell, the cylindrical shell is coaxially arranged with the first fan, and a preset ventilation gap is formed between the inner peripheral wall of the cylindrical shell and the periphery of the first fan to serve as a bypass for supplying fresh air to flow to the second air inlet section;
when the first fan air door baffle is in a closed position, fresh air enters the second air inlet section through the bypass in the first volute; when the first fan air door baffle is in the opening position, fresh air enters the second air inlet section in the first volute through two paths, namely the first fan interior and the bypass.
A second aspect of the present invention discloses an air conditioner, comprising: a fresh air device as claimed in any preceding claim.
Has the advantages that: the fresh air device of the air-conditioning indoor unit designed by the invention adopts a double-fan structure, and the high resistance of the air inlet section is overcome by the form of serial connection of the double fans, so that the effect of ultra-large fresh air volume is achieved. The fresh air device is provided with the fan air door structure, so that air flow can avoid the fan which does not operate, and the flow resistance is reduced.
Drawings
The above and other objects, features and advantages of the present disclosure will become more apparent by describing in detail exemplary embodiments thereof with reference to the attached drawings. The drawings described below are merely exemplary embodiments of the present disclosure, and other drawings may be derived by those skilled in the art without inventive effort.
Fig. 1 is a view showing an appearance structure of a fresh air device of an indoor air conditioner according to an embodiment;
fig. 2 is an exploded view of a fresh air device of an indoor air conditioner according to an embodiment;
FIG. 3 is a sectional view of a fresh air device damper closed in an indoor air conditioner according to an embodiment;
fig. 4 is a sectional view showing an opening of a damper of a fresh air device of an indoor air conditioner according to an embodiment.
Wherein: 1. a first air intake cavity shell; 2. a first volute; 3. a second air intake cavity shell; 4. a second volute; 5. a filter screen; 6. a filter screen bracket; 7. a first fan damper; 8. a first fan damper; 9. a damper flap motor; 10. a first fan impeller; 11. a first fan support plate; 12. A resonant sound-deadening chamber; 13. a second fan wheel.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular forms "a", "an", and "the" as used in the examples of the present invention and the appended claims are intended to include the plural forms as well, and "a plurality" typically includes at least two, but does not exclude the inclusion of at least one, unless the context clearly indicates otherwise.
It should be understood that the term "and/or" as used herein is merely a relational relationship that describes a relational object, meaning that three relationships may exist, e.g., a and/or B, may represent: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a good or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such good or system. Without further limitation, an element defined by the phrase "comprising a … …" does not exclude the presence of additional like elements in a commodity or system comprising the element.
The air inlet section resistance of the existing air conditioner fresh air device is too large, if the size of a house wall hole limits the diameter of a fresh air pipe, the layout of an air conditioner pipeline needs the fresh air pipe to be bent and arranged, the higher the filtration grade of a fresh air filter screen is, the larger the resistance is, and the like. The resistance of the air inlet section seriously influences the performance of the new fan, the new air volume is realized by mainly improving the rotating speed of the fan, the effect of improving the air inlet volume is not obvious, and the problem of noise deterioration of the new fan is brought by increasing the rotating speed. The invention provides a fresh air device of an indoor unit of an air conditioner, which adopts a double-fan series structure to overcome the high resistance of an air inlet section of a fresh air system and achieve the effect of ultra-large fresh air volume. In addition, the control to the air door assembly is matched, the single fan operates in the low fresh air volume gear, and the double fans operate simultaneously in the high fresh air volume gear. The invention also provides a resonance silencing cavity structure between the air ducts of the double fans, which can eliminate the vortex noise in the fresh air duct, improve the noise tone quality of the air ducts in which the double fans operate simultaneously, and simultaneously adjust the shape of the air inlet cavity flow passage to reduce the vortex in the flow passage.
To further illustrate the technical solution of the present invention, the following specific examples are provided as shown in fig. 1 to 4.
As shown in fig. 1 to fig. 4, in this embodiment, a fresh air device of an indoor unit of an air conditioner is provided, and the fresh air device includes: the first fan section, the second air inlet section and the second fan section which form a fresh air supply flow path are sequentially connected in series. The first fan section includes: the first volute 2, a first fan arranged in the first volute 2 and a damper assembly arranged at the inlet of the first fan; the second fan section includes: a second volute 4 and a second fan disposed in the second volute 4; the second air inlet section includes: and a second air inlet cavity shell 3, wherein a second air inlet cavity inlet connected with the outlet of the first volute 2 and a second air inlet cavity outlet connected with the inlet of the second volute 4 are formed on the second air inlet cavity shell 3.
The fresh air device of the air-conditioning indoor unit adopts a double-fan series structure to overcome the high resistance of the air inlet section of the fresh air system, and achieves the effect of ultra-large fresh air volume.
In some alternatives, the damper assembly comprises: the first fan air door 8 is fixed on the inlet side of the first fan, and a first air hole correspondingly communicated with the inlet of the first fan is formed in the first fan air door 8; first fan air door baffle 7, first fan air door baffle 7 rotationally sets up on first fan air door 8, and wherein first fan air door baffle 7 has the closed position that can block first wind hole and open the position of opening first wind hole on its rotation path. When the first fan air door baffle is in a closed position, fresh air enters the second air inlet section through a bypass formed by bypassing the first fan in the first volute; when the first fan air door baffle is in the opening position, fresh air enters the second air inlet section through two paths of the interior of the first fan and the bypass in the first volute.
As shown in fig. 2, the first scroll casing 2 employs a cylindrical casing. The cylindric casing sets up with first fan is coaxial, and is formed with between the internal perisporium of cylindric casing and the periphery of first fan and predetermines the ventilation gap in order to make the new trend flow direction second air inlet section as the bypass. The air door assembly in the fresh air device is controlled in a matched mode, the air flow channel can be enabled to avoid the fan which does not operate when the fresh air volume is low, and therefore the resistance of the flow channel inside the air inlet cavity is reduced.
Preferably, the first fan damper 8 is fixed on the first scroll casing 2, and a second air hole correspondingly communicated with the preset ventilation gap is further formed on the first fan damper 8. In another alternative, the first fan damper 8 is a circular plate-shaped structure corresponding to the cylindrical housing, and a plurality of support arms are formed on the first fan damper 8 and distributed around the circumference of the first fan damper, and the plurality of support arms are connected with the first volute 2.
In this embodiment, the first fan segment further comprises: a first fan bracket plate 11 for fixing the first fan. The first fan support plate is connected with the first volute 2, and a third air hole for fresh air to flow to the second air inlet section is formed between the first fan support plate 11 and the inner peripheral wall of the first volute 2 in a matched manner. It should be noted that, the first fan includes the first fan wheel 10 and drives the driving motor of this first fan wheel 10, and the first fan mounting panel that adopts platelike structure can effectively support the fan when fixing first fan, and for saving the material, also can fix first fan on first spiral case 2 only through setting up corresponding support frame or many support arms etc. this moment because can leave great clearance between the support arm, does not add and establish corresponding ventilation hole structure and can not exert an influence to the new trend flow yet.
Specifically, as shown in fig. 2 to 4, the first fan section includes a first volute 2, a first fan damper 7, a first fan damper 8, a damper motor 9, a first fan impeller 10, and a first fan support plate 11. The first fan damper 8 is located above the first fan wheel 10, preferably: in this embodiment, the first fan air door is provided with 4 symmetrical first air holes, and the first air holes correspond to the air inlet area of the first fan impeller. The number of the first air holes may be any one of 1 to 6. First fan air door baffle can cover on the first wind hole of first fan air door to first fan air door baffle can drive the rotation through the air door baffle motor, makes the air door open or close. The air door baffle motor is fixed on the first fan air door, and the first fan air door and the first fan support plate can be fixed on the first volute. Preferably, the following components: the first fan wheel is a centrifugal fan, and the first fan type includes, but is not limited to, a multi-wing forward-curved centrifugal fan, and may also be a backward-curved centrifugal fan.
In some optional modes, the fresh air device is further provided with a resonance silencing cavity structure for eliminating pneumatic noise in the fresh air duct, and the noise of the air duct generated when the double fans operate simultaneously can be obviously eliminated. Preferably, the second air intake section further includes: and the sound-absorbing plate 12 is arranged in the second air inlet cavity shell. The muffling plate 12 is provided with muffling holes penetrating through two sides of the plate body, and the muffling plate 12 and the first fan support plate 11 are matched to form a resonance muffling cavity for muffling a fresh air device.
Preferably, the first fan support plate is of a circular plate-shaped structure, and the silencing plate is of a curved plate shell structure covering the first fan support plate. As shown in fig. 3 and 4, the second air intake section is provided with a resonance silencing cavity, and the resonance silencing cavity can weaken vortex sound of air flow in the air duct, so that certain help is provided for reducing cavity sound. The resonant sound-deadening cavity is in a perforated plate form, the perforated plate and the first fan support plate of the first volute 2 are combined into a resonant cavity, and gas in the cavity can resonate at a certain frequency. The sound-absorbing board 12 is designed to be a perforated plate structure and is taken as a cambered surface, and a certain number of sound-absorbing holes are arranged on the cambered surface. The frequency of the resonator is closely related to the geometry of the resonator and the size of the resonator, so the method for setting the diameter of the holes on the perforated plate and the distance between the holes needs to refer to the noise when the double-fan is started. The working principle of the resonant muffling chamber is that when sound waves are on the surface of the perforated plate, the sound waves interfere with the gas to be pushed or pushed out of the resonant chamber, so that the gas resonates. This resonance process converts acoustic energy into heat energy, which is ultimately dissipated.
This new trend device can eliminate the vortex noise in the new trend wind channel through being provided with resonance noise elimination cavity structure between the double fan wind channel, improves double fan simultaneous operation wind channel noise tone quality, still can adjust air inlet chamber runner shape simultaneously, reduces the vortex in the runner.
In some optional modes, the fresh air device further comprises: the first air inlet section can guide the flow of inlet air. The first air inlet section includes: the first air inlet cavity shell 1, the first air inlet cavity shell 1 forms the air inlet of the fresh air device and the first air inlet cavity shell 1 outlet connected with the first volute 2 inlet. Preferably: the first air inlet cavity shell 1 adopts a bell mouth structure gradually expanding along the direction of the fresh air flow, the large-mouth end of the bell mouth structure is connected with the first fan section, and the small-mouth end of the bell mouth structure is communicated with the outdoor or connected with other corresponding air-dispersing pipelines. Preferably, the first air intake section further comprises: the filter screen 5 is arranged in the first air inlet cavity shell 1; and the filter screen bracket 6 is arranged in the first air inlet cavity shell 1 and used for fixing the filter screen.
Specifically, as shown in fig. 2-4, the first air intake section includes a first air intake cavity housing 1, a filter screen 5 and a filter screen bracket 6. The filter screen is preferably: an air filtration HEPA mesh. The first air inlet chamber housing 1 has an air inlet which is connected to a fresh air inlet pipe. First air inlet chamber shell 1 and filter screen leg joint, and the HEPA net of air filtration is placed in first air inlet section.
In the present embodiment, the second fan section comprises a second volute 4 and a second fan wheel 13. The second fan is also a centrifugal fan of the type including, but not limited to, a multi-wing forward-curved centrifugal impeller.
The air conditioner fresh air device in the embodiment adopts a double-centrifugal fan blade layout, and aims to overcome the resistance of the air inlet section of the fresh air device and improve the fresh air volume. Meanwhile, the resonance silencing cavity structure is designed between the two fans, so that the air quantity is increased, the noise of the air conditioner fresh air device is reduced, and the tone quality of the fresh air device is improved.
In the fresh air device of the indoor unit of the air conditioner, the first fan impeller and the second fan impeller are independently controlled. The second fan impeller is mainly used, and the second fan impeller runs no matter the fresh air volume is any gear. The first fan impeller is assisted and is started to operate only at a gear with high fresh air volume.
As shown in fig. 3, when the fresh air device is operated at the medium air volume and below the medium air volume, the first fan impeller in the fresh air device does not operate, and meanwhile, the first fan air door is completely covered by the baffle of the first fan air door, and the air door is in a closed state. At the moment, after the air flow is sucked into the fresh air device through the air inlet, the air flow does not need to pass through the first fan impeller, the flowing resistance of the air flow passing through the first fan impeller is reduced, and the air flow directly flows into the second air inlet cavity and the second fan impeller through the bypass channel.
As shown in fig. 4, when the fresh air device is operated at a gear position above the medium wind amount, the first fan impeller in the fresh air device starts to operate, and the first fan damper is rotated to be opened. Because the first fan impeller rotates to enable the interior of the first fan impeller to be in a low-pressure state, airflow can preferentially enter the first fan after being sucked into the fresh air device through the air inlet, and then flows into the second fan in the low-pressure state after acting through the first fan.
According to the fresh air device of the indoor unit of the air conditioner, the fresh air quantity can be increased when the two fans work together, but the noise can also be increased at the same time, and the resonance silencing cavity arranged in the second air inlet section can achieve the effect of optimizing the air inlet cavity flow channel and can weaken the noise of the fresh air device.
Exemplary embodiments of the present disclosure are specifically illustrated and described above. It is to be understood that the present disclosure is not limited to the precise arrangements, instrumentalities, or instrumentalities described herein; on the contrary, the disclosure is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (13)
1. The utility model provides a new trend device of machine in air conditioning which characterized in that, new trend device includes: a first fan section, a second air inlet section and a second fan section which are sequentially connected in series to form a fresh air supply flow path,
the first fan segment includes: the first volute, a first fan arranged in the first volute and a damper assembly arranged at the inlet of the first fan; a preset ventilation gap is formed between the inner peripheral wall of the first volute and the outer periphery of the first fan, and the preset ventilation gap is a bypass;
the second fan segment includes: a second volute and a second fan disposed within the second volute;
the second air inlet section includes: the second air inlet cavity shell is provided with a second air inlet cavity inlet connected with the first volute outlet and a second air inlet cavity outlet connected with the second volute inlet;
the air door assembly comprises a first fan air door and a first fan air door baffle which is rotatably arranged on the first fan air door; a first air hole is formed in the first fan air door, the first fan air door baffle can be controlled to rotate, the first air hole is not communicated with the first fan inlet, and fresh air can enter the second air inlet section through the bypass; or the first air hole is communicated with the inlet of the first fan, and fresh air can enter the second air inlet section through the bypass and the inside of the first fan.
2. A fresh air device of an indoor unit of an air conditioner as claimed in claim 1, wherein the first fan damper has a closed position capable of blocking the first air hole and an open position capable of opening the first air hole on a rotation path thereof;
when the first fan air door baffle is in a closed position, fresh air bypasses the bypass in the first volute and enters the second air inlet section; when the first fan air door baffle is in the opening position, fresh air enters the second air inlet section in the first volute through two paths, namely the first fan interior and the bypass.
3. The fresh air device of an indoor unit of an air conditioner as claimed in claim 2, wherein the first scroll casing is a cylindrical casing, and the cylindrical casing is disposed coaxially with the first fan.
4. The fresh air device of the indoor unit of the air conditioner as claimed in claim 3, wherein the first fan damper is fixed to the first scroll casing, and a second air hole correspondingly communicated with the preset ventilation gap is formed in the first fan damper.
5. The fresh air device of the indoor unit of the air conditioner as claimed in claim 3, wherein the first fan damper has a circular plate-like structure corresponding to the cylindrical casing, and a plurality of support arms are formed on the first fan damper and distributed circumferentially around the first fan damper, and the plurality of support arms are connected to the first scroll casing.
6. The fresh air device of an indoor unit of an air conditioner as claimed in claim 1, wherein the first fan section further comprises: a first fan support plate fixing the first fan,
the first fan support plate is connected with the first volute, and a third air hole for fresh air to flow to the second air inlet section is formed between the first fan support plate and the inner peripheral wall of the first volute in a matched mode.
7. The fresh air device of an indoor unit of an air conditioner according to claim 6, further comprising: and the resonance silencing cavity is arranged in the second air inlet cavity shell.
8. The fresh air device of the indoor unit of an air conditioner as claimed in claim 7, wherein the second air intake section further comprises: the silencing plate is arranged in the second air inlet cavity shell,
the silencing plate is provided with silencing holes penetrating through two sides of the plate body, and the silencing plate and the first fan support plate are matched to form the resonance silencing cavity for silencing the fresh air device.
9. The fresh air device of an indoor unit of an air conditioner as claimed in claim 8, wherein the first fan support plate has a circular plate structure, and the sound-absorbing plate has a curved plate structure covering the first fan support plate.
10. The fresh air device of an indoor unit of an air conditioner according to claim 1, further comprising: the first air inlet section is provided with a first air inlet section,
the first air inlet section includes: the first air inlet cavity shell forms an air inlet of the fresh air device and a first air inlet cavity shell outlet connected with the first volute inlet.
11. The fresh air device of the indoor unit of an air conditioner as claimed in claim 10, wherein the first air intake section further comprises:
the filter screen is arranged in the first air inlet cavity shell;
and the filter screen bracket is arranged in the first air inlet cavity shell and used for fixing the filter screen.
12. The fresh air device of an indoor unit of an air conditioner as claimed in claim 1, wherein the first fan is a centrifugal fan, and/or the second fan is a centrifugal fan.
13. An air conditioner, characterized in that the air conditioner comprises: the fresh air device of any one of claims 1 to 12.
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| CN202111162568.XA CN113983550B (en) | 2021-09-30 | 2021-09-30 | Fresh air device and air conditioner of machine in air conditioning |
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| CN202111162568.XA CN113983550B (en) | 2021-09-30 | 2021-09-30 | Fresh air device and air conditioner of machine in air conditioning |
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