Classifications

• • 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
  • F24F13/02—Ducting arrangements
  • F24F13/06—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser
  • F24F13/068—Outlets for directing or distributing air into rooms or spaces, e.g. ceiling air diffuser formed as perforated walls, ceilings or floors

Definitions

• Patent application title Indoor unit of air conditioner
• the present invention relates to an indoor unit of an air conditioner, and in particular, sucks air from the inside of a room through a centrifugal fan provided in a housing and passes a heat exchanger provided on the blowout side of the centrifugal fan.
• the apparatus relates to an apparatus configured to blow air toward a room after cold air P or heating the air.
• the air conditioner includes a compressor for compressing a refrigerant, an indoor heat exchanger for exchanging heat between the refrigerant and room air, and an expansion valve for reducing the pressure of the refrigerant in a refrigerant circulation flow path in which the refrigerant is enclosed.
• An outdoor heat exchanger for heat exchange between the refrigerant and the outside air is sequentially arranged to constitute a refrigeration cycle.
• the air conditioner has an outdoor unit and an indoor unit, and the room unit includes a case, an outdoor heat exchanger stored in the case, and air in the outdoor heat exchanger.
• the indoor unit includes a housing, an indoor heat exchanger stored in the housing, and a fan transmitting indoor air to the indoor heat exchanger.
• the indoor unit there are various types of indoor units corresponding to stationary places.
• the so-called ceiling embedded cassette type in which a housing is embedded in a ceiling and air is sucked and blown out through a decorative panel installed on the ceiling, has become the mainstream of indoor units. ing.
• the indoor unit 100 includes a housing 1 embedded in the ceiling, and a decorative panel 2 attached to the housing 1 so as to cover the lower surface of the housing and disposed at the position of the ceiling surface.
• a suction port 2a is provided at the center of the decorative panel 2, and a suction grill 3 is provided at the suction port 2a.
• an outlet 5 provided with a wind direction plate 4 is disposed around the suction grill 3 of the decorative panel 2.
• a centrifugal fan 6a and a centrifugal fan 6 for holding a motor 6b for rotating the centrifugal fan 6a are installed in the housing 1, and the centrifugal fan 6a is operated by operating the motor 6b.
• the room air passes through the suction grille 3 and the filter 16 installed on the suction grille 3, as shown by the arrow 15 in FIG. It is guided to the mouse 10, sucked into the suction port of the centrifugal fan 6a, and discharged from the discharge port of the centrifugal fan 6a as shown by the arrow [8].
• an indoor heat exchanger 8 is disposed in the housing 1 so as to surround the periphery of the centrifugal blower 6, and the air discharged from the centrifugal fan 6 a is received by the indoor heat exchanger 8.
• a drain van 9 for receiving condensed water generated in the indoor heat exchanger 8 at the time of cooling is installed.
• the suction grill 3 is configured to be removable from the decorative panel 2 together with the filter 16;
• the structure of the filter 16 is easy to clean.
• the structure is one that can be easily maintained.
• the bellmouth 10 is attached to the inner periphery of the drain pan 9, and opening the suction grille 3 and removing the bellmouth 10 facilitates maintenance such as replacement of the centrifugal fan 6a and the motor 6b. It is configured to go to Reference numeral 28 denotes a heat insulating material provided on the inner side surface of the housing 1.
• FIG. 8 is a plan sectional view of the indoor unit 100 shown in FIG. 7 as viewed from the top plate la side of the housing 1 and shows a cross section of a portion passing through the discharge port of the centrifugal fan 6a.
• the indoor heat exchanger 8 is constituted by a straight portion and a bent portion so as to surround the centrifugal fan 6a.
• a drain pump 21 is installed at one corner of the indoor heat exchanger 8 for discharging condensation water generated in the drevan 9 (see FIG. 7) to the outside of the machine (outside the indoor unit).
• the indoor heat exchanger 8 at a portion corresponding to this corner is bent so as to avoid the drain pump 21.
• a machine room 22 for storing piping and accessories connected to the indoor heat exchanger 8.
• the blowout port 5 shown in FIG. 7 is provided on four sides of the indoor heat exchanger 8 in the indoor unit 100 on the outer peripheral side as shown by a short dashed line in FIG. It is not provided on the remote station side of the corner.
• Patent Document 1 JP-A-2000 205589
• Patent Document 1 Japanese Patent Application Laid-Open No. 2000-205589
• the indoor heat exchanger 8 is composed of a fin-and-tube heat exchanger, and is constructed by stacking a large number of aluminum plate fins in the longitudinal direction. Therefore, the air passing through the indoor heat exchanger 8 can move in the thickness direction of the heat exchanger (direction parallel to the fins), but moves in the longitudinal direction of the heat exchanger (lamination direction of the fins). Can not. For this reason, the air discharged from the centrifugal fan 6 a changes the ease of passing the air passing through the indoor heat exchanger 8 due to the difference in the angle of incidence to the indoor heat exchanger 8.
• FIG. 9 shows a wind speed distribution chart showing the velocity of the air discharged from the centrifugal fan 6 a passing through the indoor heat exchanger 8.
• the wind speed on the upper side of the indoor heat exchanger 8 is increased.
• the air discharged from the centrifugal fan 6 a in the part on the counter rotation direction side of the centrifugal fan 6 a Since the force is incident on the heat exchanger in a direction close to perpendicular (parallel to the fins), the passage resistance of air is small and air can easily pass.
• the wind speed is fast at the upper part of the indoor heat exchanger 8 and on the side opposite to the rotational direction of the centrifugal fan in the straight portion, and the straight portion in the section of the indoor heat exchanger 8
• the wind speed tends to be slower on the side of the rotational direction of the centrifugal fan.
• the heat transfer performance on the lower side of the indoor heat exchanger 8 is lowered due to the wind velocity distribution, there is a problem that the ventilation resistance of the air passing through the indoor heat exchanger 8 is also increased.
• the width of the upstream weir (upper side) of the outlet flow passage is made smaller than the width of the downstream side (lower side), so that the wind speed distribution of the air passing through the heat exchanger becomes uniform.
• making the width on the upstream side smaller than the width on the downstream side over the entire circumferential direction of the outlet flow passage increases the ventilation resistance of the outlet flow passage, and the indoor unit There is a problem that the overall volume of air flow is reduced and the blowing noise of indoor units is increased.
• the purpose of the present invention is to improve the wind speed distribution of the air passing through the indoor heat exchanger and to reduce the air flow resistance, thereby suppressing the reduction of the air volume and the increase of the blowing noise.
• a housing a centrifugal fan provided in the housing, sucking a room air, and discharging the sucked air to the periphery, and a discharge side of the centrifugal fan.
• An indoor heat exchanger disposed so as to surround the centrifugal fan; an outlet flow passage formed by the outer peripheral surface side of the indoor heat exchanger and an inner surface of the housing; and a downstream side of the outlet flow passage.
• An indoor unit of an air conditioner provided with a blowout port, wherein a resistor for narrowing the width of the blowout flow path is provided in a portion of the blowout flow path corresponding to the counter rotation direction side of the centrifugal fan in the blowout port. Make it special.
• the features of the fill of the present invention are a housing, a centrifugal fan provided in the housing, sucking in the room air, and discharging the sucked air to the surroundings, and surrounding the centrifugal fan on the discharge side of the centrifugal fan Indoor heat exchanger, an outlet channel formed by the inner peripheral surface of the indoor heat exchanger and the inner surface of the housing, and an outlet provided downstream of the outlet channel.
• An indoor unit of an air conditioner including an outlet, wherein the blowout flow passage corresponding to a corner of the inner surface of the housing is provided with a resistor that narrows the width of the blowout flow passage.
• the present invention it is possible to improve the wind speed distribution of air passing through the indoor heat exchanger and to reduce the air flow resistance, thereby suppressing the reduction of the air volume and the increase of the blowing noise.
• FIG. 1 is a plan view showing an implementation of the indoor unit of the air conditioner according to the present invention.
• FIG. 2 A sectional view taken along line A----A of Fig. 1.
• FIG. 3 is a plan view of a new example of the indoor unit of the air conditioner according to the present invention.
• FIG. 4 is a cross-sectional view taken along the line B-B in FIG.
• FIG. 5 is a plan view of a new example of the indoor unit of the air conditioner according to the present invention.
• FIG. 6 is a plan view in elevation showing a modification of the indoor unit shown in FIG. 5;
• FIG. 7 is a longitudinal sectional view showing an example of a conventional air conditioner indoor unit.
• FIG. 8 is a plan sectional view of the indoor unit shown in FIG. 7;
• FIG. 9 is a wind speed distribution of air passing through a heat exchanger in the indoor unit of the conventional air conditioner.
• FIG. 1 is a plan sectional view showing an indoor unit of the air conditioner according to a first embodiment of the present invention, wherein a cross section perpendicular to the rotation axis of the centrifugal fan and passing through the outlet of the centrifugal fan is shown in FIG. It is the figure seen from the side. Also, Fig. 2 is a view taken along line A---A of Fig. 1.
• the indoor unit 100 includes a housing 1 embedded in the ceiling, and a decorative panel 2 attached to the housing 1 so as to cover the lower surface of the housing and disposed at the position of the ceiling surface.
• a suction port 2 a is provided at the center of the cosmetic spring 2, and a suction grill 3 is provided at the suction port 2 a.
• an outlet 5 provided with a wind direction plate 4 is disposed around the suction grill 3 of the decorative panel 2.
• a centrifugal fan 6a and a centrifugal fan 6 for holding a motor 6b for rotating the centrifugal fan 6a are installed, and the centrifugal fan 6 is operated by operating the motor 6b.
• the room air passes through suction grille 3 and filter 16 installed on suction grille 3, and the housing 1 is moved. It is guided by the bell mouth 10 installed inside, sucked into the insertion port of the centrifugal fan 6 a, and discharged from the centrifugal fan 6 a as shown by the arrow 18.
• FIG. 2 is not a wedge surface passing through the rotation shaft of the centrifugal fan 6a.
• an indoor heat exchanger 8 is disposed in the housing 1 so as to surround the periphery of the centrifugal blower 6, and the air discharged from the centrifugal fan 6 a is transferred to the indoor heat exchanger 8.
• a drain van 9 for receiving condensed water generated in the indoor heat exchanger 8 at the time of cooling is installed.
• the above-mentioned suction-and-suction-incorporated guguriruru 33 together with the above-mentioned Fufir rutata 11 66 is constituted to the attachment-detachment removal ⁇ function from the above-mentioned notation cosmetic makeup panel panel nelle 22 Front and rear,
• the structure of the above-mentioned ⁇ ⁇ ⁇ ⁇ ⁇ ⁇ 11 11 66 has become easy to clean and clean. .
• the electric and electrical goods box 11 11 which has been delivered to him has been set up, and it is possible to open the above-mentioned suction and suction, and the opening and closing of the gguril rill 33 here.
• the electrical and mechanical goods box 11 11 of the above-mentioned electrical and mechanical goods box 11 has become a structure with easy and easily possible structure .
• the above-mentioned Bevell Mamousus 1100 is attached to the inner circumference part of the above-mentioned Dodrenren-papann 99 by means of lower hand from the lower side, a screw and a screw stop etc.
• FIG. 1 is a plan sectional view of the indoor unit 100 shown in FIG. 2 as viewed from the top plate la side of the housing 1 and shows a cross section of a portion passing through the outlet 6 aa of the centrifugal fan 6 a.
• the indoor heat exchanger 8 is configured in a substantially rectangular shape with a straight portion and a bent portion so as to surround the centrifugal fan 6 a.
• a drain pump 21 is provided at one corner of the indoor heat exchanger 8 for discharging condensation water produced in the drain pan 9 (see FIG. 2) to the outside of the machine (outside of the indoor unit), The indoor heat exchanger 8 at a portion corresponding to this corner is bent so as to avoid the drain pump 21.
• a machine room 22 for storing piping and accessories connected to the indoor heat exchanger 8.
• Reference numeral 28 denotes a thermal insulation material provided on the inner side surface (inner peripheral side) of the housing 1 described above.
• the blower outlet 5 shown in FIG. 2 is provided on four sides of the indoor heat exchanger 8 in the indoor unit 100 on the outer peripheral side as shown by a rectangular broken line in FIG. It is not provided on the outer peripheral side of the part.
• resistors 24 for narrowing the air flow path are provided at portions corresponding to the respective sides of the indoor heat exchanger 8.
• the resistor 24 can suppress excessive flow of air to the portion of the indoor heat exchanger 8 where air can easily pass, and can facilitate flow of air to the portion of the indoor heat exchanger 8 where air can not easily pass. Therefore, the wind speed distribution of the air passing through the indoor heat exchanger 8 can be made more uniform. Furthermore, the position where the resistor 24 is attached is not the whole of the blowout flow passage 20 in the indoor unit 100 (a part of the centrifugal fan in the upper part of the blowout flow passage 20 and the blowout port 5 in the S direction) Since the ventilation resistance can be reduced over the entire circumferential direction of the blowout flow passage 20 compared to the case where the width on the upstream side is made smaller than the width on the downstream side, the air volume is reduced. And increase in blowing noise can be suppressed.
• the end of the resistor 24 on the counter rotating direction side of the centrifugal fan 6 a is located at a position corresponding to the starting point of the bent portion of the indoor heat exchanger 8. It is preferable to do.
• the length in the longitudinal direction of the resistor 24 is the length of the linear portion of the indoor heat exchanger 8 or the length of the linear portion in the indoor heat exchanger 8 in order to suppress an increase in the ventilation resistance in the blowout flow passage 20 and the outlet 5. It is preferable that the length of the blowout port 5 be approximately 1 to 2/4.
• the length of the resistor 24 a provided in the blowout flow passage 20 between the drain pump 21 and the machine chamber 22 is the length of the other three resistors 24. Also, the increase in ventilation resistance in this part is suppressed. Furthermore, it is preferable that the length in the short direction of the resistor 24 be about 1 to 2 ⁇ 3 of the width of the flow passage 20.
• FIGS. 3 and 4 the portions given the same reference numerals as in FIGS. 1 and 2 indicate the same or corresponding portions, and the description will be made focusing on the portions different from FIGS. 1 and 2.
• FIG. 3 is a plan sectional view showing Embodiment 2 of the indoor unit of the air conditioner according to the present invention, wherein the cross section perpendicular to the rotation axis of the centrifugal fan and passing through the outlet of the centrifugal fan is It is the figure seen from. 4 is a cross-sectional view taken along the line B-B in FIG.
• the resistor 24 is provided on the linear portion of the indoor heat exchanger 8 or on the side of the rotational direction of the centrifugal fan 6 a in the outlet 5 .
• the corner corresponding to the corner of the inner surface of the casing in the circumferential outlet flow passage 20 formed on the inner surface of the casing 1 that is, the corner corresponding to the corner of the indoor heat exchanger Resistors 25 and 26 are provided to narrow the width of 20 (the channel width).
• the three resistors 25 and 26 are provided at the three corners excluding the machine chamber 22, that is, the three corners of the outlet flow passage 20. There is.
• the resistor 25 is provided at the corner where the drain pump 21 is provided as shown in FIG. 4, and this resistor 25 is a drain pump 21. Provided only at the top of the Since the resistor 26 provided at the other two corner portions does not have the drain pump 21, it is provided from the entire height of the blowout passage 20, that is, from the top surface of the housing 2 to the drain pan 9.
• the lower part of the rotation direction stool I of the centrifugal fan 6a is the position where the air is most difficult to pass. Therefore, by providing the resistors 25 and 26 at the corners in contact with the i to make it difficult for air to pass through the corners of the indoor heat exchanger 8, a centrifugal fan in the straight portion of the indoor heat exchanger 8 is provided. 6 a Air can flow to the lower part on the rotational direction side. Moreover, since no blowout is provided at each corner, even if the resistors 25 and 26 are provided over the entire height of this part, the ventilation resistance of the blowout flow passage 20 is hardly deteriorated as a whole. .
• the drain pump 21 since the drain pump 21 itself also functions as a resistor, the resistor 25 is provided only on the top of the drain pump 21 where a large space is formed. Just do it. [0037]
• the wind speed distribution of the air passing through the indoor heat exchanger 8 can be improved, and the air flow resistance can be reduced, so that the air volume reduction and the air flow noise increase can be suppressed.
• An indoor unit of an air conditioner can be obtained.
• resistors 25 and 26 are provided at three corners of the outlet flow passage 20 . However, at least one or more of the three corners are provided.
• the resistor 25 or 26 may be provided in the part.
• FIG. 3 A third embodiment of the present invention will now be described using FIG.
• the parts denoted by the same reference numerals as in FIGS. 1 to 4 indicate the same or corresponding parts, and parts different from the embodiment shown in FIGS. 1 to 4 will be mainly described.
• FIG. 5 is a plan sectional view showing Embodiment 3 of the indoor unit of the air conditioner according to the present invention, wherein a cross section perpendicular to the rotary shaft of the centrifugal fan and passing through the outlet of the centrifugal fan is It is the figure seen from.
• both the resistor 24 in the first embodiment shown in FIGS. 1 and 2 and the resistors 25 and 26 in the second embodiment shown in FIGS. 3 and 4 are provided. It is.
• a resistor 24 for narrowing the width of the blowout passage is provided in a portion of the blowout passage 20 corresponding to the counter rotation direction side of the centrifugal fan 6 a in the blowout port 5.
• the corners of the inner surface of the casing in the outlet flow passage 20 are also provided with resistors 26 and 27 for reducing the width of the outlet flow passage 20.
• the resistor 27 is a resistor (see the resistor 25 in FIG. 3) provided on the top of the drain pump 2 ] (see FIGS. 1 and 4), and the centrifugal fan 6a in the counter-rotating direction at the outlet 5
• a resistor (see the resistor 24a in FIG. 1) provided in the portion of the blowout flow passage 20 corresponding to the side is integrally configured.
• the antibody 24 provided at a position corresponding to the outlet 5 (the straight portion of the indoor heat exchanger 8) is provided only on the upper side of the outlet flow passage 20 as in the first embodiment.
• the resistors 26 provided at the corners are installed over the entire height of the blowout flow path 20 (the entire height from the upper surface of the housing 2 to the drain pan 9) as in the case of the embodiment.
• the resistor 27 provided on the upper portion of the drain pump 21 is provided in the upper space, and the portion 27a corresponding to the position of the outlet 5 of the resistor 27 is Similar to the resistor 24 shown in FIG. 2, it is provided only on the upper side of the outlet flow passage 20.
• the portion where the air is most likely to flow (the portion of the outlet flow passage 20 corresponding to the centrifugal fan 6 a in the opposite rotational direction side of the outlet 5) and the portion where the air is most difficult to
• the resistors 26 and 27 in the rain direction of the blowout flow path corresponding to the air flow, air can flow from the hardest flow area, and the wind speed of the air passing through the indoor heat exchanger 8 The distribution can be made more uniform.
• the resistor 24 provided in the portion of the blowout flow passage 20 corresponding to the counter rotation direction side of the centrifugal fan 6a in the blowout port 5, and the casing in the blowout flow passage 20 The resistor 26 provided at the corner of the inner surface of the body is spaced apart by a predetermined distance.
• the predetermined distance may be, for example, 0.7 to 1.0 times the width of the blower outlet 5 in the width direction.
• a resistor provided at the upper part of the lens pump 21 and a resistor provided at a portion of the blowout flow path 20 corresponding to the centrifugal fan 6a counter rotation direction side at the blowout port 5 are integrated to form a resistor 27 It is configured as
• the resistor 27 is formed by integrating the resistor at the upper portion of the drain pump 21 and the resistor at the upper portion of the outlet 5. However, the resistor 27 at the upper portion of the drain pump 21 and the upper portion of the outlet 5 are The resistor may be separated. However, when the resistor 27 is integrated, manufacture becomes easier.
• FIG. 6 is a plan sectional view of the indoor unit, which corresponds to FIG. 5, and the portions given the same reference numerals as in FIGS. 1 to 5 are the same or corresponding portions.
• the inner peripheral side of the housing 1 is made of a heat insulating material 28, often. Therefore, in the weir array shown in FIG. 6, the resistors 24, 26, 27 shown in FIG. 5 are integrally formed with the above-mentioned heat insulating material 28 to form the heat insulating material 29 having the resistors. For example, manufacturing cost can be reduced by manufacturing the heat insulating material 29 having a resistor by forming the heat insulating material 28 and the resistors 24, 26, 27 in a body by using expanded polystyrene.
• the present invention includes various modifications that are not limited to the above-described embodiments.
• the resistor is provided in a portion of the outlet flow passage 20 corresponding to all the straight portions of the indoor heat exchanger 8 or the corners of the housing 1 Depending on the wind speed distribution of the air passing through the heat exchanger 8, it may be provided in a part of them.

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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)
• Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)
• Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)

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Citations (5)

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• 2015
  • 2015-09-01 JP JP2015171807A patent/JP6704695B2/ja active Active
• 2016
  • 2016-08-09 WO PCT/IB2016/054782 patent/WO2017037556A1/ja active Application Filing

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