JP7118264B2 - Exhaust grill, indoor unit and air conditioner - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blowout grill, an indoor unit, and an air conditioner having an opening through which air is blown out.

2. Description of the Related Art Conventionally, a blowout grill attached to a ceiling-embedded indoor unit of an air conditioner is known as a blowout grill having an opening through which air is blown out. In a ceiling-embedded indoor unit, generally, an air outlet portion formed in a housing of the indoor unit and an air outlet grille installed on the ceiling surface are connected by a duct. Cool air or warm air blown out from the indoor unit is blown into the room from the blow-out grill via the duct. Further, in recent years, a ceiling-embedded indoor unit has been installed in a downward ceiling or the like, and an air outlet grill has been proposed that is directly attached to an air outlet portion formed in the housing of the indoor unit.

The blow-out grill has louvers that change the blow-out direction of the air. Conventionally, outlet grills with manually operated louvers have been the mainstream, but in recent years, outlet grills with electrically controlled louvers, which are often used in home wall-mounted indoor units, have also been proposed. In the outlet grille, a plurality of louvers for controlling airflow are arranged at appropriate intervals.

Patent Document 1 discloses an indoor unit having a panel that is an outlet grille with vertical and horizontal blades. In Patent Document 1, when the vertical blades swing at the maximum angle, the downstream end of the vertical blade on the downstream side of the air and the upstream end of the adjacent vertical blade on the upstream side of the air overlap in the width direction. there is

Chinese Utility Model No. 203231493

However, in the indoor unit disclosed in Patent Document 1, the downstream end of the vertical blade on the air downstream side and the upstream end of the adjacent vertical blade on the air upstream side overlap in the width direction. As a result, the air passage through which the air flows is narrowed, resulting in an increase in pressure loss.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and provides an outlet grill, an indoor unit, and an air conditioner that reduce pressure loss.

The blowout grille according to the present invention includes a frame body having an opening through which air is blown out, and a plurality of blowout grilles provided in the opening of the frame body at intervals in the width direction, extending in the vertical direction, and extending in the width direction with the vertical direction as an axis. a downstream end of the side louver on the downstream side of the air in the depth direction and an upstream side of the air of the side louver adjacent to the moving direction side of the downstream end of the side louver. The upstream end of the side louver is spaced in the width direction when the side louver is swinging at the maximum angle, the space C, the length B from the downstream end to the upstream end of the side louver, A parameter L indicating the relationship with the maximum angle θ is given by L=(B·sin θ+C)/(B·sin θ), and satisfies the relationship 1<L<1.5.

According to the present invention, the downstream end of the side louver on the downstream side of the air and the upstream end of the air on the upstream side of the side louver adjacent to the side louver are arranged such that the side louver swings at the maximum angle. are spaced in the width direction. Therefore, it is possible to secure an air passage through which the air current flows. Therefore, pressure loss can be reduced.

1 is a circuit diagram showing an air conditioner according to Embodiment 1. FIG. 1 is a perspective view showing an indoor unit according to Embodiment 1; FIG. 1 is a perspective cross-sectional view showing an indoor unit according to Embodiment 1. FIG. Fig. 2 is a side sectional view showing the indoor unit according to Embodiment 1; 1 is a perspective view showing a blow-out grill according to Embodiment 1; FIG. 1 is a front view showing a blowout grill according to Embodiment 1; FIG. FIG. 2 is a top cross-sectional view showing the blowout grille according to Embodiment 1; FIG. 4 is a schematic diagram showing a side louver according to Embodiment 1; 4 is a distribution diagram showing the distribution of airflow according to Embodiment 1. FIG. 4 is a distribution diagram showing the distribution of airflow according to Embodiment 1. FIG. 4 is a graph showing distribution of airflow according to Embodiment 1. FIG.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of a blowout grill, an indoor unit, and an air conditioner according to the present invention will be described with reference to the drawings. In addition, this invention is not limited by embodiment described below. In addition, in the following drawings including FIG. 1, the size relationship of each component may differ from the actual size. In addition, in the following description, directional terms are used as appropriate to facilitate understanding of the present invention, but these terms are for the purpose of describing the present invention, and these terms are intended to limit the scope of the present invention. is not. Directional terms include, for example, "up", "down", "right", "left", "front" or "back".

Embodiment 1.
FIG. 1 is a circuit diagram showing an air conditioner 1 according to Embodiment 1. FIG. An air conditioner 1 is a device that adjusts indoor air, and includes an outdoor unit 2 and an indoor unit 3 as shown in FIG. The outdoor unit 2 is provided with, for example, a compressor 6, a channel switching device 7, an outdoor heat exchanger 8, an outdoor fan 9, and an expansion section 10. The indoor unit 3 is provided with an indoor heat exchanger 11 and an indoor fan 12, for example.

A refrigerant circuit 4 is configured by connecting a compressor 6 , a flow path switching device 7 , an outdoor heat exchanger 8 , an expansion section 10 and an indoor heat exchanger 11 through refrigerant pipes 5 . The compressor 6 sucks in a low-temperature, low-pressure refrigerant, compresses the sucked refrigerant, converts it into a high-temperature, high-pressure refrigerant, and discharges it. The flow switching device 7 switches the direction in which the refrigerant flows in the refrigerant circuit 4, and is, for example, a four-way valve. The outdoor heat exchanger 8 exchanges heat, for example, between outdoor air and refrigerant. The outdoor heat exchanger 8 acts as a condenser during cooling operation and acts as an evaporator during heating operation. The outdoor blower 9 is a device that sends outdoor air to the outdoor heat exchanger 8 .

The expansion unit 10 is a pressure reducing valve or an expansion valve that reduces the pressure of the refrigerant to expand it. The expansion section 10 is, for example, an electronic expansion valve whose opening is adjusted. The indoor heat exchanger 11 exchanges heat, for example, between indoor air and refrigerant. The indoor heat exchanger 11 acts as an evaporator during cooling operation, and acts as a condenser during heating operation. The indoor fan 12 is a device that sends indoor air to the indoor heat exchanger 11 . The refrigerant may be water, an antifreeze liquid, or a refrigerant.

(Operating mode, cooling operation)
Next, operation modes of the air conditioner 1 will be described. First, the cooling operation will be explained. In the cooling operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow switching device 7 and flows into the outdoor heat exchanger 8 acting as a condenser. It is heat-exchanged with the outdoor air sent by 9, condenses and liquefies. The condensed liquid refrigerant flows into the expansion section 10 and is expanded and decompressed in the expansion section 10 to become a low-temperature, low-pressure gas-liquid two-phase refrigerant. Then, the gas-liquid two-phase refrigerant flows into the indoor heat exchanger 11 acting as an evaporator, where it is heat-exchanged with the indoor air sent by the indoor fan 12 to evaporate and gasify. do. At this time, the indoor air is cooled, and cooling is performed in the room. The vaporized low-temperature, low-pressure gaseous refrigerant passes through the flow switching device 7 and is sucked into the compressor 6 .

(Operating mode, heating operation)
Next, the heating operation will be explained. In the heating operation, the refrigerant sucked into the compressor 6 is compressed by the compressor 6 and discharged in a high-temperature and high-pressure gas state. The high-temperature and high-pressure gaseous refrigerant discharged from the compressor 6 passes through the flow switching device 7 and flows into the indoor heat exchanger 11 acting as a condenser. It is heat-exchanged with the indoor air sent by 12 and condenses and liquefies. At this time, the indoor air is warmed, and heating is performed in the room. The condensed liquid refrigerant flows into the expansion section 10, where it is expanded and decompressed to become a low-temperature, low-pressure gas-liquid two-phase refrigerant. Then, the gas-liquid two-phase refrigerant flows into the outdoor heat exchanger 8 that acts as an evaporator, where it exchanges heat with the outdoor air sent by the outdoor fan 9 and evaporates into gas. do. The vaporized low-temperature, low-pressure gaseous refrigerant passes through the flow switching device 7 and is sucked into the compressor 6 .

(Indoor unit 3)
2 is a perspective view showing the indoor unit 3 according to Embodiment 1, and FIG. 3 is a perspective sectional view showing the indoor unit 3 according to Embodiment 1. FIG. 4 is a side sectional view showing the indoor unit 3 according to Embodiment 1. FIG. Next, the indoor unit 3 will be described in detail. The indoor unit 3 is, for example, a ceiling-embedded indoor unit that is embedded in the ceiling. As shown in FIGS. 2 to 4, the indoor unit 3 includes a housing 20 and a blowout grill 30. As shown in FIGS.

(Case 20)
The housing 20 has a rectangular parallelepiped shape and is a box having a hollow inside. An indoor heat exchanger 11 and an indoor fan 12 are provided inside the housing 20 . The indoor heat exchanger 11 is provided in front of the interior of the housing 20 . The indoor fan 12 is provided at the rear inside the housing 20 and has a motor 12a and two fans 12b. The motor 12a is provided between the two fans 12b and rotationally drives the two fans 12b. The fan 12b is rotationally driven by the motor 12a and sends air to the indoor heat exchanger 11. As shown in FIG.

A suction port 21 and a blowout port 22 are formed in the housing 20 . The suction port 21 is an opening through which air is sucked, and is formed on the rear surface of the housing 20 . The air outlet 22 is an opening through which air is blown out, and is formed on the front surface of the housing 20 . The indoor blower 12 sucks indoor air from the suction port 21 and sends the sucked air to the indoor heat exchanger 11. - 特許庁The indoor fan 12 blows out the air heat-exchanged with the refrigerant in the indoor heat exchanger 11 from the outlet 22 .

(Blow-out grill 30)
5 is a perspective view showing the outlet grill 30 according to the first embodiment, and FIG. 6 is a front view showing the outlet grill 30 according to the first embodiment. FIG. 7 is a top sectional view showing the blowout grill 30 according to the first embodiment. The blowout grille 30 may be directly connected to the housing 20 of the indoor unit 3 or indirectly connected to the housing 20 of the indoor unit 3 via a duct or the like. As shown in FIGS. 5 to 7, it has a duct connection surface 40, a frame 50, a louver motor 60, an upper and lower louver 70, and a side louver 80. As shown in FIGS.

(Duct connection surface 40)
The duct connection surface 40 is a plate-shaped member extending in the width direction, and is attached to a duct (not shown) when the housing 20 and the blowout grille 30 are connected via the duct. The duct connection surface 40 has a blowout surface 41 and a flat surface 42 . The blowout surface 41 is a portion facing the blowout port 22 of the housing 20 when connected to the housing 20, and is mostly open. The blowout surface 41 is a portion to which the frame 50 is attached. The flat surface 42 is provided on the side of the blowout surface 41 and is a flat portion without an opening. An expansion unit (not shown) or the like for expanding the function of the indoor unit 3 is attached to the flat surface 42 . Note that the expansion unit is not illustrated in the first embodiment.

(Frame body 50)
The frame body 50 is a frame-shaped decorative panel having an opening 51 through which air is blown out, and is attached to the blowout surface 41 of the duct connection surface 40 . Here, the opening 51 has a rectangular parallelepiped shape. The upper part of the frame 50 is chamfered so that the thickness becomes thinner upward. The lower part of the frame 50 is chamfered so that the thickness becomes thinner downward.

(louver motor 60)
The louver motor 60 is provided between the frame 50 and the duct connecting surface 40 at one end of the frame 50 and drives the upper and lower louvers 70 and the side louvers 80 to rotate. The louver motor 60 receives a signal or the like transmitted from a remote controller (not shown) or the like provided in the indoor unit 3, and rotates the upper and lower louvers 70 and the side louvers 80 based on the received signal. .

(Upper and lower louvers 70)
A plurality of upper and lower louvers 70 are provided in the opening 51 of the frame 50 at intervals in the vertical direction, and are elongated members extending in the width direction. The vertical louver 70 is driven by the louver motor 60 to swing vertically about the width direction. The vertical louver 70 controls the vertical traveling direction of the air blown out from the air outlet 22 of the housing 20 by the swinging angle.

(Side louver 80)
A plurality of side louvers 80 are provided in the opening 51 of the frame 50 at intervals in the width direction, and are elongated members extending in the vertical direction. The side louvers 80 are driven by the louver motor 60 to swing in the width direction about the vertical axis. The side louver 80 controls the traveling direction in the width direction of the air blown out from the air outlet 22 of the housing 20 by the swinging angle.

FIG. 8 is a schematic diagram showing the side louver 80 according to Embodiment 1. FIG. Here, the downstream end 81 and the upstream end 82 of the side louvers 80 will be described. The downstream end 81 of the side louver 80 is the end of the side louver 80 on the downstream side of the air in the depth direction, and is the end opposite to the axis around which the side louver 80 rotates. The upstream end 82 of the side louver 80 is the air upstream end of the side louver 80 in the depth direction and is integral with the axis around which the side louver 80 rotates. In the first embodiment, as shown in FIG. 8, the downstream end 81 of the side louver 80 and the upstream end 82 of the side louver 80 adjacent to the moving direction side of the downstream end 81 are spaced apart in the width direction. Vacant.

Specifically, there is a gap in the width direction between the downstream end 81 of the side louver 80 and the upstream end 82 of the adjacent side louver 80 when the side louver 80 is swinging at the maximum angle. ing. In this case, the interval is C [mm], the length from the downstream end 81 to the upstream end 82 of the side louver 80 is B [mm], and the maximum angle is θ [deg]. A parameter L indicating the relationship between the interval C, the length B, and the maximum angle θ is expressed by L=(B·sin θ+C)/(B·sin θ). In the first embodiment, the relationship 1<L<1.5 is satisfied. The interval A between the side louvers 80 can be obtained from the formula A=B·sin θ+C.

FIG. 9 is a distribution diagram showing the airflow distribution according to the first embodiment. Here, the distribution of the airflow, which is the flow of air blown out from the blowout grill 30, will be described. In FIG. 9, the upper side is the outlet grill 30 side. The position of one end of the blowout grill 30 when the blowout grill 30 is viewed from the front is indicated by (1). In FIG. 9, each hatching indicates a difference in wind speed, the closer the position is to (1), the higher the wind speed, and the farther from (1), the lower the wind speed. Also, the position of the boundary between the wind speed of 0.1 [m/s] and the wind speed of 0.2 [m/s] is indicated as (2). The angle formed by a line extending vertically from (1) and a line segment connecting (1) and (2) is defined as an airflow angle x. It should be noted that the wind speed of 0.2 [m/s] is considered to be the wind speed at which humans can perceive the wind.

FIG. 10 is a distribution diagram showing the airflow distribution according to the first embodiment. Next, the airflow angle x when the interval A [mm] between the side louvers 80 or the parameter L is set to an arbitrary value will be described. In FIG. 10, when A = 25 or L = 0.95, when A = 30 or L = 1.14, when A = 35 or L = 1.34, and when A = 40 or L = 1 .53 case and airflow distribution.

As shown in FIG. 10, when A = 25 or L = 0.95, the airflow angle x = 61 [deg], and when A = 30 or L = 1.14, the airflow angle x = 62.5 [deg]. deg]. Further, when A=35 or L=1.34, the airflow angle x=61.5 [deg], and when A=40 or L=1.53, the airflow angle x=53 [deg]. Thus, the parameter L is used for numerical analysis of airflow distribution. As shown in FIG. 10, if 1<L<1.5, there is no change in directivity in the direction in which the airflow advances.

If the interval between the louvers is narrow, the number of louvers to be installed increases, which increases the manufacturing cost of the blowout grille, and also narrows the air passage through which the airflow flows, resulting in an increase in pressure loss. On the other hand, if the distance between the louvers is large, the airflow cannot be sent in the desired direction. In the first embodiment, the relationship 1<L<1.5 is satisfied. As a result, the airflow angle x can be kept high and the directivity of the airflow can be maintained. That is, regardless of the installation interval of the side louvers 80, the blow-out grille 30 can send the air blown out from the blow-out port 22 of the housing 20 in the same direction.

11 is a graph showing the airflow distribution according to the first embodiment. FIG. In FIG. 11, the horizontal axis is the parameter L, and the vertical axis is the airflow angle [deg]. As shown in FIG. 11, there is a large difference in airflow angle between L=1.35 and L=1.53. That is, for example, if 1<L<1.35, an airflow angle of 60 [deg] can be secured. Therefore, it is preferable to satisfy the relationship 1<L<1.35.

According to the first embodiment, the downstream end 81 of the side louver 80 on the downstream side of the air and the upstream end 82 of the side louver 80 on the upstream side of the air next to the side louver 80 There is a gap in the width direction when the louver 80 is swinging at the maximum angle θ. Therefore, the number of installed side louvers 80 is reduced. Therefore, the manufacturing cost of the blowout grill 30 can be suppressed. In addition, there is a gap in the width direction between the downstream end 81 of the side louver 80 on the downstream side of the air and the upstream end 82 of the side louver 80 on the upstream side of the side louver 80 next to the side louver 80 . , it is possible to secure an air passage through which the air current flows. Therefore, pressure loss can be reduced.

Also, the parameter L satisfies the relationship 1<L<1.5. As a result, the manufacturing cost of the blowout grille 30 can be suppressed to reduce the pressure loss, and the blowout grille 30 can send the air blown out from the blowout port 22 of the housing 20 in the same direction.

1 air conditioner, 2 outdoor unit, 3 indoor unit, 4 refrigerant circuit, 5 refrigerant pipe, 6 compressor, 7 flow path switching device, 8 outdoor heat exchanger, 9 outdoor fan, 10 expansion section, 11 indoor heat exchanger , 12 indoor blower, 12a motor, 12b fan, 20 housing, 21 suction port, 22 outlet, 30 outlet grille, 40 duct connection surface, 41 outlet surface, 42 flat surface, 50 frame, 51 opening, 60 louver 70 Upper and lower louvers 80 Side louvers 81 Downstream end 82 Upstream end.

Claims (4)

a frame having an opening through which air is blown;
a plurality of side louvers provided at intervals in the width direction in the opening of the frame, extending in the vertical direction, and swinging in the width direction about the vertical direction as an axis;
The downstream end of the side louver on the downstream side of the air in the depth direction and the upstream end of the side louver on the upstream side of the air adjacent to the moving direction side of the downstream end of the side louver are spaced apart in the width direction when the side louvers are swinging at the maximum angle ,
A parameter L indicating the relationship between the distance C, the length B from the downstream end to the upstream end of the side louver, and the maximum angle θ is L=(B·sin θ+C)/(B·sin θ) and satisfies the relationship 1<L<1.5
blowout grill. A parameter L indicating the relationship between the distance C, the length B from the downstream end to the upstream end of the side louver, and the maximum angle θ is L=(B·sin θ+ C )/(B·sin θ ) and satisfies the relationship 1 <L<1.35. an indoor heat exchanger that exchanges heat between a refrigerant and air; and an indoor fan that sends air to the indoor heat exchanger;
a blowout grill according to claim 1 or 2 , which is provided at the blowout port of the housing;
indoor unit. an indoor unit according to claim 3 ;
A compressor that is connected to the indoor unit by a pipe and compresses a refrigerant, an outdoor heat exchanger that exchanges heat between the refrigerant compressed by the compressor and air, and a refrigerant heat-exchanged by the outdoor heat exchanger. an outdoor unit having an expanding section that expands;
An air conditioner with.

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