JP7209844B2 - 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. Cold 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, an air outlet, which is an opening formed in an air outlet grill, is provided with vertical blades 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, the indoor unit disclosed in Patent Document 1 is not provided with vertical blades at the end of the outlet. Therefore, the air flowing through the end of the outlet becomes a straight flow. Therefore, when the straight airflow hits the airflow whose direction is controlled by the vertical blades, there is a possibility that the airflow whose direction is controlled by the vertical blades is prevented from going sideways.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems. It provides an apparatus.

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. and a shielding portion projecting from the widthwise end of the opening in the frame toward the side louver, the space A and the distance between the upstream end of the side louver and the shielding portion The length B satisfies the condition of B≧(2/3)×A. and a front end projecting forward of the frame from the front end of the portion .

According to the present invention, the shield blocks the air flowing to the widthwise end of the opening in the frame. Therefore, it is possible to prevent a straight flow from flowing to the widthwise end of the opening of the frame. Therefore, when the straight airflow hits the airflow whose direction is controlled by the side louvers, it does not prevent the airflow whose direction is controlled by the side louvers from going sideways.

1 is a circuit diagram showing air conditioner 1 according to Embodiment 1. FIG. Fig. 2 is a perspective view showing the indoor unit 3 according to Embodiment 1; Fig. 2 is a perspective cross-sectional view showing the indoor unit 3 according to Embodiment 1; Fig. 3 is a side sectional view showing the indoor unit 3 according to Embodiment 1; 3 is a perspective view showing the blowout grill 30 according to Embodiment 1. FIG. Fig. 2 is a front view showing the blow-out grill 30 according to the first embodiment; 3 is a top cross-sectional view showing the blowout grill 30 according to Embodiment 1. FIG. FIG. 4 is a schematic diagram showing side louvers 80 and shielding portions 90 according to Embodiment 1; 4 is a distribution diagram showing the distribution of airflow according to Embodiment 1. FIG. 8 is a schematic diagram showing a side louver 80 according to Comparative Example 2. 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 constituent member may differ from the actual one. Also, 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-in 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, 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 indoor heat exchanger 11 acting as an evaporator, and in the indoor heat exchanger 11, heat is 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, and in the outdoor heat exchanger 8, heat is exchanged with the outdoor air sent by the outdoor fan 9 to evaporate and gasify. 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 type indoor unit 3 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 blower 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 51 through which air is sucked, and is formed on the rear surface of the housing 20 . The air outlet 22 is an opening 51 through which air is blown, 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, the duct connection surface 40, the frame 50, the louver motor 60, the upper and lower louvers 70, the side louvers 80, and the shielding portion 90 (see FIG. 8). have.

(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 that faces the blowout port 22 of the housing 20 when connected to the housing 20 , and has an opening 51 for the most part. 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 where the opening 51 is not formed. 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. A lower portion 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.

(Shielding part 90)
FIG. 8 is a schematic diagram showing the side louver 80 and the shielding part 90 according to the first embodiment. As shown in FIG. 8 , the shielding part 90 protrudes from the widthwise end of the opening 51 in the frame 50 toward the side louvers 80 . Specifically, the shielding part 90 is provided between the widthwise end of the opening 51 in the frame 50 and the upstream end 82 of the side louver 80 . The shielding portion 90 is a plate-like member and has an extension portion 91 and a tip portion 92 . The extending portion 91 extends from the widthwise end of the opening 51 in the frame 50 toward the side louvers 80 . The tip portion 92 protrudes from the tip of the extension portion 91 toward the front of the frame 50 . 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 about which the side louver 80 rotates.

According to the first embodiment, the shielding part 90 blocks the air flowing to the widthwise end of the opening 51 of the frame 50 . That is, the shielding part 90 intentionally blocks a part of the air passage between the widthwise end of the opening 51 in the frame 50 and the side louvers 80 . Therefore, the straight flow Y (see FIG. 10) is suppressed from flowing to the widthwise end of the opening 51 in the frame 50 . Therefore, when the straight flow Y hits the airflow X whose direction is controlled by the side louvers 80, it does not prevent the airflow X whose direction is controlled by the side louvers 80 from going sideways. Thus, in the first embodiment, the directivity of the airflow X whose direction is controlled by the side louvers 80 is improved.

Here, as shown in FIG. 8, A is the distance between the adjacent side louvers 80, and B is the length between the upstream end 82 of the side louver 80 and the tip of the extending portion 91 of the shielding portion 90. do. The first embodiment satisfies the condition B≧(2/3)×A.

FIG. 9 is a distribution diagram showing the airflow distribution according to the first embodiment. FIG. 9 shows the result of numerical analysis of the wind velocity distribution of the airflow. 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 diagram in the upper left column is a standard diagram of the blowout grill 130 of Comparative Example 1 satisfying B=(1/3)×A. In FIG. 9, the diagram in the upper right column is an enlarged diagram of the blowout grill 130 of Comparative Example 1 satisfying B=(1/3)×A. In FIG. 9, the diagram in the lower left column is a standard diagram of the outlet grill 30 of the first embodiment that satisfies B=(2/3)×A. In FIG. 9, the figure in the lower right column is an enlarged view of the outlet grille 30 of the first embodiment that satisfies B=(2/3)×A. In all the views of FIG. 9 , the upper side is the rear side of the blowout grille 30 and the lower side is the front side of the blowout grille 30 .

As shown in FIG. 9, in the blowout grill 130 of Comparative Example 1 satisfying B=(1/3)×A, the width between the shielding portion 90 and the side louver 80 is excessively narrow. As a result, warm air, which is secondary air in the room, is drawn into the space between the shielding portion 90 and the side louvers 80 during the cooling operation. In this way, there is a risk that condensation will occur on the surface of the side louvers 80 due to the warm air coming into contact with the side louvers 80 that have been cooled by the cooling operation.

On the other hand, as shown in FIG. 9, in the case of the outlet grille 30 of the first embodiment satisfying B=(2/3)×A, the width between the shielding portion 90 and the side louver 80 is slightly wider. As a result, in the cooling operation, the airflow flows along the side louvers 80 , so that warm air, which is secondary air in the room, is not involved and does not flow between the shielding portion 90 and the side louvers 80 . In the first embodiment, since B=(2/3)×A or more, it is possible to suppress condensation on the side louvers 80 during cooling operation.

FIG. 10 is a schematic diagram showing a side louver 80 according to Comparative Example 2. As shown in FIG. As shown in FIG. 10 , the outlet grille 230 of Comparative Example 2 does not have the blocking portion 90 . In this case, the airflow at the end of the width direction of the opening 51 in the frame 50 becomes the straight flow Y. As shown in FIG. In Comparative Example 2, the straight flow Y collides with the airflow whose direction is controlled by the vertical blades, and may hinder the airflow whose direction is controlled by the vertical blades from going sideways.

On the other hand, the blowout grill 30 according to Embodiment 1 has a shielding portion 90 as shown in FIG. The shielding part 90 blocks the air flowing to the widthwise end of the opening 51 in the frame 50 . That is, the shielding part 90 intentionally blocks a part of the air passage between the widthwise end of the opening 51 in the frame 50 and the side louvers 80 . Therefore, the straight flow Y is suppressed from flowing to the widthwise end of the opening 51 in the frame 50 . Therefore, when the straight flow Y hits the airflow X whose direction is controlled by the side louvers 80, it does not hinder the airflow X whose direction is controlled by the side louvers 80 from going sideways.

Also, the distance A and the length B between the upstream end 82 of the side louver 80 and the shielding portion 90 satisfy the condition of B≧(2/3)×A. As a result, as shown in FIG. 9, in the cooling operation, the air flows along the side louvers 80, so that the warm air, which is the secondary air in the room, is not involved, and the warm air flows between the shielding portion 90 and the side louvers 80. do not flow in between. Therefore, condensation on the side louvers 80 can be suppressed during cooling operation.

Further, the shielding portion 90 includes an extending portion 91 extending from the widthwise end of the opening 51 in the frame 50 toward the side louver 80 and a front end of the extending portion 91 projecting forward of the frame 50 . and a tip 92 that In this way, since the tip portion 92 protrudes forward from the tip of the extension portion 91 toward the front of the frame 50, as shown in FIG. flow is guided.

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 motor, 70 upper and lower louvers, 80 side louvers, 81 downstream end, 82 upstream end, 90 shielding part, 91 extending part, 92 tip part, 130 blowout grille, 230 blowout grille, X air flow, Y straight flow.

Claims (3)

a frame having an opening through which air is blown;
a plurality of side louvers provided in the opening of the frame at intervals in the width direction, extending in the vertical direction, and swinging in the width direction about the vertical direction as an axis;
a shielding portion projecting from a widthwise end of the opening in the frame toward the side louver;
with
The distance A and the length B between the upstream end of the side louver and the shielding portion satisfy the condition of B≧(2/3)×A,
The shielding part is
an extending portion extending from a widthwise end of the opening in the frame toward the side louver;
and a tip portion projecting forward from the tip of the extension portion toward the front of the frame.
blowout grill. 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 , which is provided at the blowout port of the housing;
indoor unit. The indoor unit according to claim 2 ;
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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