CN116529535A - Indoor unit of ceiling embedded air conditioner - Google Patents
Indoor unit of ceiling embedded air conditioner Download PDFInfo
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- CN116529535A CN116529535A CN202180073754.8A CN202180073754A CN116529535A CN 116529535 A CN116529535 A CN 116529535A CN 202180073754 A CN202180073754 A CN 202180073754A CN 116529535 A CN116529535 A CN 116529535A
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- Prior art keywords
- heat exchanger
- center
- suction port
- air
- ceiling
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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
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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
- F24F1/0043—Indoor units, e.g. fan coil units characterised by mounting arrangements
- F24F1/0047—Indoor units, e.g. fan coil units characterised by mounting arrangements mounted in the ceiling or at the ceiling
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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
- F24F1/0059—Indoor units, e.g. fan coil units characterised by heat exchangers
- F24F1/0063—Indoor units, e.g. fan coil units characterised by heat exchangers by the mounting or arrangement of the heat exchangers
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Air Filters, Heat-Exchange Apparatuses, And Housings Of Air-Conditioning Units (AREA)
Abstract
An indoor unit of a ceiling-embedded air conditioner of the present invention includes: a housing which is embedded in the ceiling and has a suction port formed at the rear and a discharge port formed at the front when viewed from the front; a blower fan that discharges air sucked into the casing from the suction port to the outside of the casing from the discharge port; and a heat exchanger that exchanges heat between the refrigerant and air sucked into the casing from the suction port by the blower fan, wherein the blower fan is disposed between a forefront position, which is the front end, and a rearmost position, which is the rear end, of the front end and the rear end of the heat exchanger, the blower fan being disposed closer to one end of the longer air path distance from the center of the end to the center of the suction port, and in the front-rear direction.
Description
Technical Field
The present disclosure relates to an indoor unit of a ceiling-embedded air conditioner, and more particularly to an arrangement of an air blower fan.
Background
Since the indoor units of the ceiling-embedded air conditioner are installed so as to be embedded in the ceiling, high performance and a small size that does not occupy a space in the ceiling are required. Further, in order to further improve the performance of the indoor unit, it is important to improve the heat exchange efficiency.
Conventionally, there is an indoor unit of a ceiling-embedded air conditioner, which includes a casing having a suction port and a discharge port formed in a lower surface thereof, and a blower fan and a heat exchanger disposed in an air passage formed in the casing to circulate air from the suction port to the discharge port, the suction port being divided into 2 (for example, refer to patent document 1). In the indoor unit of the ceiling-embedded air conditioner of patent document 1, the heat exchange efficiency is improved by dividing the suction port into 2 so that air is efficiently supplied from the suction port to the heat exchanger.
Patent document 1: japanese patent application laid-open No. 2018-165592
However, when a plurality of suction ports are formed as in the indoor unit of the ceiling-embedded air conditioner of patent document 1, there is a problem that the number or area of filters disposed in the suction ports increases and the structure becomes complicated.
Disclosure of Invention
The present disclosure has been made to solve the above-described problems, and an object of the present disclosure is to provide an indoor unit of a ceiling-embedded air conditioner capable of improving heat exchange efficiency without providing a plurality of suction ports.
An indoor unit of a ceiling-embedded air conditioner of the present disclosure includes: a housing which is embedded in the ceiling and has a suction port formed at the rear and a discharge port formed at the front when viewed from the front; a blower fan that discharges air sucked into the casing from the suction port to the outside of the casing from the discharge port; and a heat exchanger that performs heat exchange between the refrigerant and the air sucked into the casing from the suction port by the blower fan, wherein the blower fan is disposed between a forefront position of the front end and a rearmost position of the rear end of the front end of the heat exchanger, the forefront position being a position of the rear end of the heat exchanger, and the end having a longer air path distance from the center of the end to the center of the suction port.
Further, an indoor unit of a ceiling-embedded air conditioner according to the present disclosure includes: a housing which is embedded in the ceiling and has a suction port formed at the rear and a discharge port formed at the front when viewed from the front; a blower fan that discharges air sucked into the casing from the suction port to the outside of the casing from the discharge port; and a plurality of heat exchangers that exchange heat between the refrigerant and the air sucked into the casing from the suction port by the blower fan, wherein the blower fan is disposed between a position at the forefront of an end portion located at the forefront of the heat exchanger and a position at the rearrear of an end portion located at the rearrear of the heat exchanger, in the front-rear direction, in the heat exchanger having a longer air path distance than the heat exchanger having a shorter air path distance from the center of the heat exchanger to the center of the suction port.
According to the indoor unit of the ceiling-embedded air conditioner of the present disclosure, the blower fan is disposed near one of the front end and the rear end of the heat exchanger, which is longer in the air passage distance from the center of the end to the center of the suction port, and is disposed between the forefront position of the front end and the rearmost position of the rear end in the front-rear direction. Alternatively, the blower fan is disposed closer to a heat exchanger having a longer air path distance than a heat exchanger having a shorter air path distance from the center of the heat exchanger to the center of the suction port, among the plurality of heat exchangers, and is disposed between a forefront position, which is an end portion located forward of the forefront heat exchanger, and a rearmost position, which is an end portion located rearward of the rearmost heat exchanger, in the front-rear direction.
Here, the closer to the blower fan, the faster the wind speed, so that the passing wind volume of the heat exchanger increases. Therefore, the blower fan is disposed near one of the front end and the rear end of the heat exchanger, which has a longer air passage distance from the center of the end to the center of the suction port, or near the heat exchanger, which has a longer air passage distance than the heat exchanger, which has a shorter air passage distance from the center of the heat exchanger to the center of the suction port, of the plurality of heat exchangers. In this way, the air flow rate of the heat exchanger or the end portion of the heat exchanger which is far from the suction port and has a small air flow rate can be increased, so that the air flow rate flowing into the entire heat exchanger can be made uniform, and the heat exchange efficiency can be improved. The blower fan is disposed between a forward-most position of an end portion that is a forward direction and a rearward-most position of an end portion that is a rearward direction, or between a forward-most position of an end portion that is a forward direction of the forward-most heat exchanger and a rearward-most position of an end portion that is a rearward direction of the rearward-most heat exchanger. In this way, the range in which the air can be sucked by the blower fan is widened, so that a large amount of air flow can be ensured, and the air blowing efficiency is improved. As a result, the heat exchange efficiency can be improved without providing a plurality of suction ports.
Drawings
Fig. 1 is a schematic cross-sectional view of an indoor unit of a ceiling-embedded air conditioner according to embodiment 1, as seen from the side.
Fig. 2 is a schematic cross-sectional view illustrating the arrangement of an air blower fan of an indoor unit of a ceiling-embedded air conditioner according to embodiment 1.
Fig. 3 is a schematic cross-sectional view of an indoor unit of a ceiling-embedded air conditioner according to modification 1 of embodiment 1, viewed from the side.
Fig. 4 is a schematic cross-sectional view illustrating the arrangement of an air blower fan of a ceiling-embedded air conditioner according to modification 1 of embodiment 1.
Fig. 5 is a schematic cross-sectional view of an indoor unit of a ceiling-embedded air conditioner according to modification 2 of embodiment 1, viewed from the side.
Fig. 6 is a schematic cross-sectional view of an indoor unit of a ceiling-embedded air conditioner according to embodiment 2, as seen from the side.
Fig. 7 is a schematic cross-sectional view of an indoor unit of a ceiling-embedded air conditioner according to modification 1 of embodiment 2, viewed from the side.
Fig. 8 is a schematic cross-sectional view of an indoor unit of a ceiling-embedded air conditioner according to modification 2 of embodiment 2, viewed from the side.
Fig. 9 is a view of the heat exchanger of fig. 8 viewed in the direction of arrow X.
Fig. 10 is a view of the heat exchanger of fig. 8 viewed in the direction of arrow Y.
Detailed Description
Embodiments of the present disclosure are described below based on the drawings. Further, the present disclosure is not limited by the embodiments described below. In the following drawings, the size relationship of each component may be different from that of the actual component.
Embodiment 1
Fig. 1 is a schematic cross-sectional view of an indoor unit 100 of a ceiling-embedded air conditioner according to embodiment 1, as viewed from the side.
The following describes the structure of the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 1. In the following description, terms indicating directions, such as "upper", "lower", "right", "left", "front", "rear", etc., are used as appropriate for ease of understanding, and are used for illustration, and these terms are not limiting of the embodiments. In embodiment 1, "up", "down", "right", "left", "front", "rear", and the like are used in a state where the indoor unit 100 of the ceiling-embedded air conditioner is viewed from the front (as viewed from the direction of arrow a in fig. 1).
The indoor unit 100 of the ceiling-embedded air conditioner is provided so as to be embedded in the ceiling 200, and includes a casing 1 having a box shape and embedded in the ceiling 200, as shown in fig. 1. A suction port 5 for sucking indoor air into the inside is formed on the rear lower surface of the casing 1, and a discharge port 8 for discharging air-conditioned air to the outside is formed on the front lower surface of the casing 1. The suction port 5 is provided with a flat plate-like suction grill 6 having an opening and forming an external decorative surface, and a filter 7 covering the opening of the suction grill 6. Accordingly, the indoor air sucked from the suction port 5 is sucked into the casing 1 through the opening of the suction grill 6 and the filter 7. The discharge port 8 is provided with an upper and lower vane 9 for changing the wind direction in a predetermined range in the up-down direction.
The casing 1 is provided therein with a blower fan 2 rotatably disposed to generate a flow of air, a motor (not shown) coupled to the blower fan 2 to be driven in rotation, a plurality of heat exchangers 3a and 3b disposed in a state inclined with respect to a horizontal plane to exchange heat between indoor air sucked into the casing 1 from the suction port 5 by the blower fan 2 and refrigerant to produce air-conditioning air, and a drain pan 4 disposed below the heat exchangers 3a and 3b to collect drain water from the heat exchangers 3a and 3b. In addition, an air passage 20 is formed in the casing 1 so that air flows from the intake port 5 to the discharge port 8 through the heat exchangers 3a and 3b, and the blower fan 2 and the heat exchangers 3a and 3b are disposed in the air passage 20. In embodiment 1, the total number of heat exchangers 3a and 3b is 2, but the present invention is not limited thereto, and 3 or more heat exchangers may be provided.
Next, the operation of the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 1 will be described.
When the motor is rotationally driven, the blower fan 2 connected to the motor rotates, and indoor air is sucked through the suction port 5, and the indoor air is sucked into the casing 1 through the filter 7. The indoor air sucked by the blower fan 2 is discharged toward the heat exchangers 3a and 3b, and when the heat exchangers 3a and 3b pass, heat exchange is performed at the heat exchangers, so that the air is converted into air-conditioned air, and is discharged from the outlet 8 toward the indoor. At this time, the direction of the air-conditioning air discharged from the discharge port 8 is changed according to the direction of the upper and lower blades 9.
Next, the arrangement of the blower fan 2 according to embodiment 1 will be described.
Fig. 2 is a schematic cross-sectional view illustrating the arrangement of the blower fan 2 of the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 1. In fig. 2, arrow A1 indicates the flow of air from the center of the suction port 5 to the center of the heat exchanger 3a, and arrow B1 indicates the flow of air from the center of the suction port 5 to the center of the heat exchanger 3B.
As shown in fig. 2, the distance from the center of the heat exchanger 3a to the air passage 20 at the center of the suction port 5 (hereinafter referred to as the air passage distance) is relatively short for the plurality of heat exchangers 3a and 3b, and the distance from the center of the heat exchanger 3b to the air passage 20 at the center of the suction port 5 is long, and the blower fan 2 is disposed close to the heat exchanger 3b having a long air passage distance among the plurality of heat exchangers 3a and 3b.
Here, the closer to the blower fan 2, the faster the wind speed, so that the ventilation amount of the heat exchangers 3a, 3b increases. Therefore, the blower fan 2 is disposed closer to the heat exchanger 3B, and the air path distance (length of arrow B1 in fig. 2) from the center of the heat exchanger 3B to the center of the suction port 5 is longer in the plurality of heat exchangers 3a, 3B than in the heat exchanger 3a having a shorter air path distance (length of arrow A1 in fig. 2) from the center to the center of the suction port 5. In this way, the air quantity flowing into the whole heat exchanger is uniformized, and the heat exchange efficiency can be improved. The arrangement of the blower fan 2 close to each other means that: the same applies to the following case where the suction port (not shown) of the blower fan 2 is disposed so as to be close to each other.
The blower fan 2 is disposed between a forefront position B2, which is a front end 3B1 of the forefront heat exchanger 3B, and a rearmost position A2, which is a rear end 3a1 of the rearmost heat exchanger 3a, in the front-rear direction.
In this way, the blower fan 2 is disposed between the forefront position B2, which is the front end 3B1 of the forefront heat exchanger 3B, and the rearmost position A2, which is the rear end 3a1 of the rearmost heat exchanger 3a, in the front-rear direction. In this way, the range C in which the blower fan 2 can suck air is widened, so that a large amount of air flow can be ensured, and the blower efficiency is improved. As a result, the heat exchange efficiency can be improved without providing a plurality of suction ports 5.
Fig. 3 is a schematic cross-sectional view of an indoor unit 100 of a ceiling-embedded air conditioner according to modification 1 of embodiment 1, viewed from the side.
In modification 1 of embodiment 1, as shown in fig. 3, only 1 heat exchanger 30 is provided instead of a plurality of heat exchangers. Other structures are the same as those of embodiment 1.
Next, the arrangement of the blower fan 2 according to modification 1 will be described.
Fig. 4 is a schematic cross-sectional view illustrating the arrangement of the blower fan 2 of the indoor unit 100 of the ceiling-embedded air conditioner according to modification 1 of embodiment 1. In fig. 4, arrow A1 indicates the flow of air from the center of the suction port 5 to the center of the rear end 31 of the heat exchanger 30, and arrow B1 indicates the flow of air from the center of the suction port 5 to the center of the front end 32 of the heat exchanger 30.
As shown in fig. 4, the blower fan 2 is disposed near one end 32 of the front end 32 and the rear end 31 of the heat exchanger 30, which has a longer air passage distance from the center to the center of the suction port 5.
Here, the closer to the blower fan 2, the faster the wind speed is, so that the passing wind volume of the heat exchanger 30 increases. Therefore, the front end 32 and the rear end 31 of the heat exchanger 30 have a short air path distance (length of arrow A1 in fig. 4) from the center of the end 31 to the center of the suction port 5, and the air path distance (length of arrow B1 in fig. 4) from the center of the end 32 to the center of the suction port 5 is long, so that the blower fan 2 is disposed close to the front end 32 and the rear end 32 of the heat exchanger 30, respectively, and the air path distance is long at the end 32 of the rear end 31. In this way, the air quantity flowing into the whole heat exchanger is uniformized, and the heat exchange efficiency can be improved.
The blower fan 2 is disposed between a forefront position B2 of the front end 32 of the heat exchanger 30 and a rearmost position A2 of the rear end 31 in the front-rear direction.
In this way, the blower fan 2 is disposed between the forefront position B2 of the front end portion 32 of the heat exchanger 30 and the rearmost position A2 of the rear end portion 31 in the front-rear direction. In this way, since the range C in which the blower fan 2 can suck air is widened, a large amount of air blowing can be ensured, and the air blowing efficiency is improved. As a result, the heat exchange efficiency can be improved without providing a plurality of suction ports 5.
Fig. 5 is a schematic cross-sectional view of an indoor unit 100 of a ceiling-embedded air conditioner according to modification 2 of embodiment 1, viewed from the side.
In modification 2 of embodiment 1, as shown in fig. 5, a suction port 5 for sucking indoor air into the inside is formed in the rear surface of the casing 1, and a discharge port 8 for discharging air-conditioning air to the outside is formed in the front surface of the casing 1. Other structures are the same as those of embodiment 1.
As described above, the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 1 includes: a housing 1 which is embedded in the ceiling 200 and has a suction port 5 formed at the rear and a discharge port 8 formed at the front when viewed from the front; a blower fan 2 that discharges air sucked into the casing 1 from the suction port 5 to the outside of the casing 1 through the discharge port 8; and a heat exchanger 30 that exchanges heat between the refrigerant and air sucked into the casing 1 from the suction port 5 by the blower fan 2. The blower fan 2 is disposed near one of the front end 32 and the rear end 31 of the heat exchanger 30, which has a longer air passage distance from the center of the end to the center of the suction port 5, and is disposed between a position B2 that is the forefront end 32 and a position A2 that is the rearmost end 31 in the front-rear direction.
Alternatively, the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 1 includes: a housing 1 which is embedded in the ceiling 200 and has a suction port 5 formed at the rear and a discharge port 8 formed at the front when viewed from the front; a blower fan 2 that discharges air sucked into the casing 1 from the suction port 5 to the outside of the casing 1 through the discharge port 8; and a plurality of heat exchangers 3a and 3b that exchange heat between the refrigerant and air sucked into the casing 1 from the suction port 5 by the blower fan 2. The air passage distance from the center of the heat exchanger 3a to the center of the suction port 5 is short, and the air passage distance from the center of the heat exchanger 3B to the center of the suction port 5 is long, and the blower fan 2 is disposed close to the heat exchanger 3B having a long air passage distance among the plurality of heat exchangers 3a, 3B, and is disposed between the position B2 at the front end 3B1 located at the front of the heat exchanger 3B and the position A2 at the rear end 3a1 located at the rear of the heat exchanger 3a located at the rear in the front-rear direction.
According to the indoor unit 100 of the ceiling-embedded air conditioner of embodiment 1, the blower fan 2 is disposed near one of the front end 32 and the rear end 31 of the heat exchanger 30, which has a longer air passage distance from the center of the end to the center of the suction port 5, and is disposed between the forefront position B2 of the front end 32 and the rearmost position A2 of the rear end 31 in the front-rear direction. Alternatively, the blower fan 2 is disposed between a position B2 located at the forefront of the end 3B1 located at the forefront of the heat exchanger 3B and a position A2 located at the rearmost of the end 3a1 located at the rearmost of the heat exchangers 3a in the front-rear direction, near the heat exchanger 3B having a longer air path distance than the heat exchanger 3a having a shorter air path distance from the center of the heat exchanger to the center of the suction port 5, among the plurality of heat exchangers 3a, 3B.
Here, the closer to the blower fan 2, the faster the wind speed becomes, and the passing wind volume of the heat exchangers 30, 3a, 3b increases. Therefore, the blower fan 2 is disposed near one of the front end 32 and the rear end 31 of the heat exchanger 30, which has a longer air path distance from the center of the end to the center of the suction port 5, or near the heat exchanger 3b, which has a longer air path distance than the heat exchanger 3a, which has a shorter air path distance from the center of the heat exchanger to the center of the suction port 5, of the plurality of heat exchangers 3a and 3b. In this way, the air flow rate passing through the end portion 32 of the heat exchanger 30 or the heat exchanger 3b, which is far from the suction port 5 and has a small air flow rate, can be increased, and therefore the air flow rate flowing into the entire heat exchanger can be made uniform, and the heat exchange efficiency can be improved. The blower fan 2 is disposed between a forefront position B2 of the front end 32 and a rearmost position A2 of the rear end 31 in the front-rear direction, or between a forefront position B2 of the front end 3B1 of the forefront heat exchanger 3B and a rearmost position A2 of the rear end 3a1 of the rearmost heat exchanger 3a in the front-rear direction. In this way, since the range C in which the blower fan 2 can suck air is widened, a large amount of air supply volume can be ensured, and the blower efficiency can be improved. As a result, the heat exchange efficiency can be improved without providing a plurality of suction ports 5.
Embodiment 2
Hereinafter, embodiment 2 will be described, but the description of the portions overlapping with embodiment 1 will be omitted, and the same or corresponding portions as those in embodiment 1 will be denoted by the same reference numerals.
Fig. 6 is a schematic cross-sectional view of the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 2, as seen from the side. Fig. 7 is a schematic cross-sectional view of an indoor unit 100 of a ceiling-embedded air conditioner according to modification 1 of embodiment 2, viewed from the side. Fig. 8 is a schematic cross-sectional view of an indoor unit 100 of a ceiling-embedded air conditioner according to modification 2 of embodiment 2, viewed from the side.
Fig. 9 is a view of the heat exchanger 3a of fig. 8 viewed in the direction of arrow X. Fig. 10 is a view of the heat exchanger 3b of fig. 8 viewed in the direction of arrow Y. In fig. 6 to 8, arrow A1 indicates the flow of air from the center of the suction port 5 to the center of the heat exchanger 3a, and arrow B1 indicates the flow of air from the center of the suction port 5 to the center of the heat exchanger 3B.
As shown in fig. 8 to 10, the plurality of heat exchangers 3a and 3b include heat pipes 10a and 10b (not shown in fig. 9 and 10) and fins 40a and 40b, respectively. As shown in fig. 6, among the plurality of heat exchangers 3a and 3b, the heat exchanger 3a having a short air path distance from the center of the heat exchanger to the center of the suction port 5 has a different specification from the heat exchanger 3b having a long air path distance. Specifically, the ventilation resistance of the heat exchanger 3B having a longer air passage distance (length of arrow B1 in fig. 6) from the center of the heat exchanger to the center of the suction port 5 among the plurality of heat exchangers 3a, 3B is lower than the specification of the heat exchanger 3a having a shorter air passage distance (length of arrow A1 in fig. 6) from the center of the heat exchanger to the center of the suction port 5. The number of columns of the heat transfer tubes 10a of the heat exchanger 3a is 2, whereas the number of columns of the heat transfer tubes 10b of the heat exchanger 3b is 1. That is, the number of columns of the heat transfer tubes 10b of the heat exchanger 3b is smaller than the number of columns of the heat transfer tubes 10a of the heat exchanger 3 a.
In addition, the structure may be as follows: as shown in fig. 7, the ventilation resistance of the heat exchanger 3b having a long air passage distance from the center of the heat exchanger to the center of the suction port 5 is lower than the specification of the heat exchanger 3a having a short air passage distance from the center of the heat exchanger to the center of the suction port 5, and the layer spacing Dpb of the heat transfer pipe 10b of the heat exchanger 3b is made wider than the layer spacing Dpa of the heat transfer pipe 10a of the heat exchanger 3 a. As shown in fig. 8, the structure may be as follows: the diameter T phi b of the heat transfer tube 10b of the heat exchanger 3b is made smaller than the diameter T phi a of the heat transfer tube 10a of the heat exchanger 3 a. In addition, the structure may be as follows: the column pitch LPb of the heat transfer tubes 10b of the heat exchanger 3b is made narrower than the column pitch LPa of the heat transfer tubes 10a of the heat exchanger 3 a. As shown in fig. 9 and 10, the structure may be as follows: the fin pitch FPb of the fins 40b of the heat exchanger 3b is made wider than the fin pitch FPa of the fins 40a of the heat exchanger 3 a. In addition, the structure may be as follows: the slit 42b of the fin 40b of the heat exchanger 3b is made thicker than the slit 42a of the fin 40a of the heat exchanger 3 a. At this time, the slit 42a of the fin 40a is formed to be thinner in the heat exchanger 3a than in the heat exchanger 3b. In order to expand the area of the fins 40a and 40b, the fins 40a and 40b are cut up, whereby the slits 42a and 42b are formed together with the cut-up portions 41a and 41 b. In addition, the cut-and-raised portions 41b of the fins 40b of the heat exchanger 3b are formed thicker than the cut-and-raised portions 41a of the fins 40a of the heat exchanger 3 a. The heat exchanger 3b is formed such that the cut-and-raised portions 41b are longer in the air flow direction (the up-and-down direction in fig. 9 and 10) between the fins 40b than the heat exchanger 3 a. In addition, the structure may be as follows: the thickness LTb of the fins 40b of the heat exchanger 3b is made thinner than the thickness LTa of the fins 40a of the heat exchanger 3 a. In addition, if the ventilation resistance of the heat exchanger 3b having a long air passage distance from the center of the heat exchanger to the center of the suction port 5 is lower than the specification of the heat exchanger 3a having a short air passage distance from the center of the heat exchanger to the center of the suction port 5, other configurations may be adopted.
In the case where the heat exchanger 30 is not provided in plural but in 1, the specification of the portion on the side of the end portion 31 having a short air passage distance from the center of the end portion to the center of the suction port 5 and the specification of the portion on the side of the end portion 32 having a long air passage distance are different in the front end portion 32 and the rear end portion 31 of the heat exchanger 30. Specifically, the ventilation resistance of the portion of the front end 32 and the rear end 31 of the heat exchanger 30 on the side of the end 32 having a longer air passage distance from the center of the end to the center of the suction port 5 is lower than the specification of the portion of the end 31 having a shorter air passage distance from the center of the end to the center of the suction port 5.
As described above, the ventilation resistance of the heat exchanger 3b having a long air passage distance from the center of the heat exchanger to the center of the suction port 5 is lower than the specification of the heat exchanger 3a having a short air passage distance from the center of the heat exchanger to the center of the suction port 5. In this way, the air flow rate of the heat exchanger 3b, which is far from the suction port 5 and has a small air flow rate, can be increased, so that the air flow rate into the entire heat exchanger can be made uniform, and the heat exchange efficiency can be improved.
As described above, in the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 2, the plurality of heat exchangers 3a and 3b include the fins 40a and 40b and the heat transfer pipes 10a and 10b, and at least one of the plurality of heat exchangers 3a and 3b is different from the other heat exchangers 3a and 3b in the specification that affects the ventilation resistance, and the ventilation resistance of the heat exchanger 3b having a longer air path distance is lower than that of the heat exchanger 3a having a shorter air path distance from the center of the heat exchanger to the center of the suction port 5.
According to the indoor unit 100 of the ceiling-embedded air conditioner of embodiment 2, at least one of the plurality of heat exchangers 3a, 3b is different from the other heat exchangers 3a, 3b in the specification that affects the ventilation resistance, and the ventilation resistance of the heat exchanger 3b having a longer air path distance is lower than that of the heat exchanger 3a having a shorter air path distance from the center of the heat exchanger to the center of the suction port 5. Therefore, the air flow rate of the heat exchanger 3b, which is far from the suction port 5 and has a small air flow rate, can be increased, and the air flow rate into the entire heat exchanger can be made uniform, thereby improving the heat exchange efficiency.
In the indoor unit 100 of the ceiling-embedded air conditioner according to embodiment 2, the front end 32 side portion and the rear end 31 side portion of the heat exchanger 30 are different in the specification that affects the ventilation resistance, and the ventilation resistance is lower in the portion on the end 32 side where the air passage distance is longer than in the portion on the end 31 side where the air passage distance is shorter from the center of the end to the center of the suction port 5.
According to the indoor unit 100 of the ceiling-embedded air conditioner of embodiment 2, the front end 32 side portion and the rear end 31 side portion of the heat exchanger 30 are different in the specification that affects the ventilation resistance, and the ventilation resistance of the portion on the end 32 side, where the air passage distance is longer, is lower than that of the portion on the end 31 side, where the air passage distance is shorter from the center of the end to the center of the suction port 5. Therefore, the air flow rate of the front end 32 side portion of the one heat exchanger 30, which is far from the suction port 5 and has a small air flow rate, can be increased, and therefore the air flow rate into the entire heat exchanger can be made uniform, and the heat exchange efficiency can be improved.
Reference numerals illustrate:
1 … shell; 2 … air supply fan; 3a … heat exchanger; 3a1 … end; 3b … heat exchanger; 3b1 … end; 4 … drain pan; 5 … suction inlet; 6 … suction grille; 7 … filter; 8 … outlet; 9 … upper and lower blades; 10a … heat pipes; 10b … heat pipes; 20 … wind path; 30 … heat exchanger; 31 … end; 32 … end; 40a … fins; 40b … fins; 41a … cut-out; 41b … cut-out; 42a … slit; 42b … slit; 100 … indoor units; 200 … ceiling.
Claims (8)
1. An indoor unit of a ceiling-embedded air conditioner, comprising:
a housing which is embedded in the ceiling and has a suction port formed at the rear and a discharge port formed at the front when viewed from the front;
a blower fan that discharges air sucked into the casing from the suction port to the outside of the casing from the discharge port; and
a heat exchanger for exchanging heat between the refrigerant and the air sucked into the casing from the suction port by the blower fan,
the blower fan is disposed between a forward-most position of the front end and a rearward-most position of the rear end of the heat exchanger, the forward-most position being a position of the front end and the rearward-most position being a position of the rear end, the one of the front end and the rear end having a longer air passage distance from a center of the end to a center of the suction port.
2. An indoor unit of a ceiling-embedded air conditioner, comprising:
a housing which is embedded in the ceiling and has a suction port formed at the rear and a discharge port formed at the front when viewed from the front;
a blower fan that discharges air sucked into the casing from the suction port to the outside of the casing from the discharge port; and
a plurality of heat exchangers for exchanging heat between the refrigerant and the air sucked into the housing from the suction port by the blower fan,
the blower fan is disposed between a forefront position, which is an end portion of the heat exchanger located forefront, and a rearmost position, which is an end portion of the heat exchanger located rearmost, and the blower fan is disposed between the forefront position, which is an end portion of the heat exchanger located rearmost, and the blower fan, which is disposed forefront, and the blower fan, which is disposed rearmost, among the plurality of heat exchangers, in the front-rear direction, in comparison with the heat exchanger having a shorter air path distance from the center of the heat exchanger to the center of the suction port.
3. The indoor unit of a ceiling-embedded air conditioner according to claim 1, wherein,
the portion on the front side of the end portion of the heat exchanger and the portion on the rear side of the end portion are different in specification that affects ventilation resistance,
the ventilation resistance of the portion of the end portion having the longer air passage distance is lower than the portion of the end portion having the shorter air passage distance from the center of the end portion to the center of the suction port.
4. The indoor unit of a ceiling-embedded air conditioner according to claim 2, wherein,
a plurality of the heat exchangers have fins and heat transfer tubes,
at least one of the plurality of heat exchangers is different from the other heat exchangers in a specification having an effect on ventilation resistance,
the heat exchanger having a longer air path distance has a lower ventilation resistance than the heat exchanger having a shorter air path distance from the center of the heat exchanger to the center of the suction port.
5. The indoor unit of a ceiling-embedded air conditioner according to claim 4, wherein,
the fin pitch of the heat exchanger having the longer air path distance is wider than the heat exchanger having the shorter air path distance from the center of the heat exchanger to the center of the suction port.
6. The indoor unit of a ceiling-embedded air conditioner according to claim 4 or 5, wherein,
a cut-up portion is provided in each of the fins of the plurality of heat exchangers,
the cut-up portion of the heat exchanger having a longer air path distance is longer in the air flow direction between the fins than the heat exchanger having a shorter air path distance from the center of the heat exchanger to the center of the suction port.
7. The indoor unit of a ceiling-embedded air conditioner according to any one of claims 4 to 6, wherein,
the heat transfer pipe of the heat exchanger having a longer air passage distance has a smaller diameter than the heat exchanger having a shorter air passage distance from the center of the heat exchanger to the center of the suction port.
8. The indoor unit of a ceiling-embedded air conditioner according to any one of claims 4 to 7, wherein,
the number of rows of the heat transfer pipes of the heat exchanger having a longer air passage distance is smaller than the heat exchanger having a shorter air passage distance from the center of the heat exchanger to the center of the suction port.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/JP2020/041329 WO2022097223A1 (en) | 2020-11-05 | 2020-11-05 | Indoor unit of ceiling-embedded air conditioner |
| JPPCT/JP2020/041329 | 2020-11-05 | ||
| PCT/JP2021/014976 WO2022097316A1 (en) | 2020-11-05 | 2021-04-09 | Ceiling-embedded air conditioner indoor unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN116529535A true CN116529535A (en) | 2023-08-01 |
Family
ID=81457014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202180073754.8A Pending CN116529535A (en) | 2020-11-05 | 2021-04-09 | Indoor unit of ceiling embedded air conditioner |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP7446477B2 (en) |
| CN (1) | CN116529535A (en) |
| WO (2) | WO2022097223A1 (en) |
Family Cites Families (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07190477A (en) * | 1993-12-24 | 1995-07-28 | Matsushita Electric Ind Co Ltd | Indoor unit for air conditioner |
| JPH08327083A (en) * | 1995-06-06 | 1996-12-10 | Mitsubishi Heavy Ind Ltd | Ceiling suspended type air conditioner |
| JP3757680B2 (en) * | 1999-05-27 | 2006-03-22 | 松下電器産業株式会社 | Air conditioner |
| JP2001304605A (en) * | 2000-04-21 | 2001-10-31 | Hitachi Ltd | Air conditioner |
| JP2005337571A (en) * | 2004-05-26 | 2005-12-08 | Daikin Ind Ltd | High-place installed air-conditioner |
| JP2006003001A (en) * | 2004-06-17 | 2006-01-05 | Rinnai Corp | Air temperature adjusting machine |
| JP2008275231A (en) * | 2007-04-27 | 2008-11-13 | Daikin Ind Ltd | Air conditioner |
| JP2008275230A (en) * | 2007-04-27 | 2008-11-13 | Daikin Ind Ltd | Air conditioner |
| WO2018062540A1 (en) * | 2016-09-30 | 2018-04-05 | ダイキン工業株式会社 | Cross-flow blower and indoor unit of air-conditioning device equipped with same |
| JP6369522B2 (en) * | 2016-11-21 | 2018-08-08 | ダイキン工業株式会社 | Indoor unit of air conditioner |
| JP2018165592A (en) * | 2017-03-28 | 2018-10-25 | 株式会社富士通ゼネラル | Indoor unit of ceiling embedded type air conditioner |
| JP2019143907A (en) * | 2018-02-22 | 2019-08-29 | パナソニックＩｐマネジメント株式会社 | Indoor unit for air conditioner |
| JP6534783B1 (en) * | 2019-03-08 | 2019-06-26 | 日立ジョンソンコントロールズ空調株式会社 | Air conditioner |
-
2020
- 2020-11-05 WO PCT/JP2020/041329 patent/WO2022097223A1/en active Application Filing
-
2021
- 2021-04-09 CN CN202180073754.8A patent/CN116529535A/en active Pending
- 2021-04-09 JP JP2022560633A patent/JP7446477B2/en active Active
- 2021-04-09 WO PCT/JP2021/014976 patent/WO2022097316A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2022097223A1 (en) | 2022-05-12 |
| WO2022097316A1 (en) | 2022-05-12 |
| JPWO2022097316A1 (en) | 2022-05-12 |
| JP7446477B2 (en) | 2024-03-08 |
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