JP2017146003A - Indoor equipment of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To effectively prevent warm air from rising without limitation in appearance and design in a simple and low cost configuration.SOLUTION: A piece of indoor equipment of an air conditioner comprises: an air inlet 3a; heat exchangers 8A to 8C; a first air outlet 12A; a blower fan 10; and vertical wind direction plates 13A and 13B. The piece of indoor equipment further comprises: a second air outlet 12B formed downward in the front of the first air outlet 12A; a bypass air channel 16 formed between the first air outlet 12A and the blower fan 10 and the second air outlet 12B for cooling the circulating air; and a damper 14 that blocks the bypass air channel 16 during cooling operation and that guides a part of the air blown out from the blower fan 10 to the bypass air channel 16 during heating operation.SELECTED DRAWING: Figure 1

Description

  The present invention relates to an indoor unit of an air conditioner that suppresses warm air blown out during heating operation.

  As shown in FIG. 5, a general air conditioner indoor unit 300 includes a suction grill 31, a front plate 32 on which the suction grill 31 is openably and closably positioned on the front surface, a top plate 3 having an air suction port 3a, A housing 7 is formed by the back plate 4, the bottom plate 5, the left side plate 6, and the right side plate (not shown). The lower piece 31a of the suction grill 31 is in contact with the front plate 32, and an upper end (not shown) of the suction grill 31 is supported by the top plate 3 and is arranged to be opened and closed with the upper end as a fulcrum. A filter (not shown) is attached to the upper part of the front plate 32, that is, the back side of the suction grill 31.

  8A is a first heat exchanger, 8B is a second heat exchanger, and 8C is a third heat exchanger. 33A is a first drain pan for the first and second heat exchangers 8A and 8B, and 33B is a second drain pan for the third heat exchanger 8C.

  Reference numeral 10 denotes a blower fan, which is disposed on the air outflow side of the first to third heat exchangers 8A to 8C. 11 is a blowing guide plate. Reference numeral 12 denotes an air outlet, which is provided between the first drain pan 33 </ b> A and the outlet guide plate 11. The blower outlet 12 is provided with a first vertical wind direction plate 13A and a second vertical wind direction plate 13B. The first vertical wind direction plate 13A rotates about the shaft 13A1, and the second vertical direction plate 13B rotates about the shaft 13B1.

  In the indoor unit 300 of FIG. 5, since the cool air blown out during the cooling operation is heavier than the indoor air, the first and second up-and-down wind direction plates 13A and 13B are set sideways so that the cool air reaches far. On the other hand, since the warm air B blown out during the heating operation is lighter than the room air, the first and second up-and-down airflow direction plates 13A and 13B are oriented vertically as shown in FIG. 5 in order to suppress the rising of the air. Is set.

  However, even if the first and second up-and-down air direction plates 11A and 11B are set in the vertical direction during the heating operation, the warm-up of the warm air B cannot be effectively suppressed.

  Therefore, conventionally, an auxiliary heat exchanger having a smaller heat exchange amount is arranged in addition to the main heat exchanger together with an auxiliary blower fan, and in the auxiliary heat exchanger, the main flow warm air flowing out of the main heat exchanger during heating operation is more than that. However, it has been practiced to generate a sub-stream warm air having a low temperature and to blow the sub-stream warm air from above the main-stream warm air to prevent the main-stream warm air from blowing up (Patent Documents 1 and 2).

  In addition, an ion generating unit is arranged on the air inflow side of the heat exchanger, and the air passing through the unit is blown to the warm air coming out from the outlet without passing through the heat exchanger as a side flow. (Patent Document 3).

  Furthermore, a dedicated large wind direction plate is arranged, and warm air blown out from the outlet is made to reach far away by a curved surface of the wind direction plate (Patent Document 4).

JP 2001-074267 A JP 2001-074304 A JP 2003-227623 A JP 2009-103348 A

  However, the above-described conventional example has problems such as a complicated structure and an increase in cost, and restrictions on the appearance design.

  An object of the present invention is to provide an indoor unit of an air conditioner that can effectively prevent warm air from being blown up with a simple configuration at low cost and without being restricted in appearance design.

  In order to achieve the above object, an invention according to claim 1 includes a suction port for sucking air, a heat exchanger for exchanging heat between the air sucked from the suction port and a refrigerant, and heat exchange by the heat exchanger. A first air outlet that blows out the air, and a blower fan that is arranged between the first air outlet and the heat exchanger and blows air that has passed through the heat exchanger from the suction port to the first air outlet. And an up-and-down air direction plate that adjusts the upper and lower air blowing directions of the air blown from the first air outlet, in the indoor unit of the air conditioner, the second formed downward in front of the first air outlet A bypass air passage that cools the circulating air that is formed between the air outlet, the first air outlet, the blower fan, and the second air outlet, and the bypass air passage is shut off during cooling operation. And blown out from the blower fan to the bypass air duct during heating operation And to characterized in that the part of the air is provided a damper for guiding.

  According to a second aspect of the present invention, in the indoor unit for an air conditioner according to the first aspect, the bypass air duct is formed by a wall body, and at least a part of the outer side of the wall body is formed by the heat exchanger. It faces the air inflow side.

  According to a third aspect of the present invention, in the indoor unit for an air conditioner according to the second aspect of the present invention, the part of the wall body of the detour air guide path includes a heat exchange part.

  According to a fourth aspect of the present invention, in the indoor unit of the air conditioner according to the second or third aspect, a drain pan that receives and discharges drain water generated in the heat exchanger is disposed below the heat exchanger, The part of the wall body of the detour wind guide path is also used as a part of the drain pan.

  According to a fifth aspect of the present invention, in the indoor unit for an air conditioner according to any one of the first to fourth aspects, the bypass air guide path is in a path from the damper toward the second air outlet. It includes a path directed away from the second air outlet.

  The invention according to claim 6 is the air conditioner indoor unit according to any one of claims 1 to 5, wherein a plurality of the wind direction plates are formed, and the damper among the plurality of wind direction plates is formed on the damper. The near wind direction plate guides a part of the air blown from the blower fan during cooling operation forward and guides a part of the air blown from the blower fan during heating operation to the bypass air duct. And

  According to the present invention, during the heating operation, the warm air blown out from the second air outlet via the bypass air duct formed between the first air outlet and the blower fan and between the second air outlet is generated. Since it is cooled by the bypass air duct and blown from above the warm air blown from the first air outlet, it is possible to effectively prevent the main stream warm air from blowing up. Moreover, since only a detour air duct is required to be added to a normal indoor unit, cost reduction can be realized. Furthermore, since the detour air guide path is formed between the first air outlet and the blower fan and between the second air outlet, there is no great restriction on the appearance design of the indoor unit.

It is sectional drawing at the time of the cooling operation of the indoor unit of 1st Example of this invention. It is sectional drawing at the time of the heating operation of the indoor unit of FIG. It is sectional drawing at the time of the cooling operation of the indoor unit of 2nd Example of this invention. It is sectional drawing at the time of the heating operation of the indoor unit of FIG. It is sectional drawing at the time of the heating operation of the conventional indoor unit

<First embodiment>
FIG. 1 shows an indoor unit 100 according to a first embodiment of the present invention. The indoor unit 100 includes a suction grill 1, a front plate 2 on which the suction grill 1 is openably and closably positioned on the front surface, a top plate 3 having an air suction port 3a, a back plate 4, a bottom plate 5, a left side plate 6, and A housing 7 is formed by the right side plate that is not. The front plate 2 is formed with a vertical piece 2a positioned parallel to the lower back surface of the suction grill 1, and formed at the rear end of the horizontal piece 2b and a horizontal piece 2b extending from the upper part of the vertical piece 2a to the back side. It has an end 2c. A filter (not shown) is mounted on the upper portion of the front plate 2, that is, on the back side of the suction grill 1.

  8A is a first heat exchanger, 8B is a second heat exchanger, and 8C is a third heat exchanger. 9A is a first drain pan for receiving and discharging drain water generated in the first and second heat exchangers 8A and 8B, and 9B is a second drain pan for receiving and discharging drain water generated in the third heat exchanger 8C. It is. The first drain pan 9A includes a lower piece 9Aa for preventing drain water from splashing, a front piece 9Ab and a support piece 9Ac for supporting the first heat exchanger 8A, and a rear piece 9Ad for preventing rain water from splashing, and the front piece 9Ab. Is in contact with the rear end 2c of the front plate 2. An opening 9Aa1 is formed in the lower piece 9Aa.

  Reference numeral 10 denotes a blower fan, which is disposed on the air outflow side of the first to third heat exchangers 8A to 8C. 11 is a blowing guide plate. A first air outlet 12 </ b> A is provided between the first drain pan 9 </ b> A and the air outlet guide plate 11. A first up-and-down air direction plate 13A and a second up-and-down air direction plate 13B are disposed at the first air outlet 12A. The first vertical wind direction plate 13A rotates about the shaft 13A1, and the second vertical direction plate 13B rotates about the shaft 13B1.

  In the opening 9Aa1 formed in the lower piece 9Aa of the first drain pan 9A, a damper 14 that rotates about the shaft 14a is disposed. Further, on the side of the suction grill 1 of the damper 14, the front plate 9 </ b> Ab of the first drain pan 9 </ b> A, the front plate 2, and the lower plate 15 arranged in parallel to the first drain pan 9 </ b> A are surrounded by a wall body 16 a as a detour guide. An air passage 16 is formed, and the bypass air guide passage 16 communicates with the second air outlet 12B. That is, a part of the wall body 16a of the detour air guide path 16 is shared by the front piece 9Ab of the drain pan 9A. The second air outlet 12B opens downward due to the arrangement of the vertical piece 2a of the front plate 2 and the lower plate 15, and is located in front of the first air outlet 12A.

  As shown in FIG. 1, in the indoor unit 100, the first and second up-and-down air direction plates 13 </ b> A and 13 </ b> B are set sideways, and the bypass air guide path 16 is closed by the damper 14. For this reason, the cold air A generated by the heat exchange with the refrigerant by the first to third heat exchangers 8A to 8C and blown out by the blower fan 109 is blown out by the blowout guide plate 11 and the first and second up and down wind direction plates 13A and 13B. Are guided in the horizontal direction and blown forward as indicated by arrows.

  Next, as shown in FIG. 2, during the heating operation, the first up-and-down airflow direction plate 13A is rotated clockwise in FIG. 2, and the tip 13Aa comes into contact with the tip 9Aa2 of the lower piece 9Aa of the first drain pan 9A. Further, when the damper 14 is slightly rotated in the clockwise direction, the opening 9Aa1 of the lower piece 9Aa of the first drain pan 9A is opened. For this reason, the detour air guide path 16 makes communication between the first air outlet 12A and the second air outlet 12B. The second up-and-down wind direction plate 13B is turned in the vertical direction by rotating counterclockwise.

  Therefore, the mainstream warm air B1 that occupies most of the warm air blown by the blower fan 10 is guided by the blowout guide plate 11 and the second up-and-down airflow direction plate 13B, and is indoors as indicated by an arrow from the first blowout port 12A. It is blown out in front of the machine 100. At this time, the mainstream warm air B1 is lighter than the indoor air and thus has a strong tendency to blow up. On the other hand, a part of the warm air is guided in the direction of the bypass air guide path 16 by the first up-and-down wind direction plate 13A and the damper 14, and the arrow flows downward from the second outlet 12B via the bypass air guide path 16 As shown in FIG. Since this secondary flow warm air B2 goes through the bypass air guide path 16 and becomes more detour than the main flow warm air B1, the temperature is lowered by natural cooling, and the main flow warm air B1 blown out from the first air outlet 12A moves downward. It comes to press on.

  Accordingly, the main flow warm air B1 having a strong tendency to blow up is pressed down from above by the low temperature sub flow warm air B2, so that the main flow warm air B1 is prevented from being blown up, and the combined warm air that combines the main flow warm air B1 and the sub flow warm air B2. The straight traveling performance of B3 becomes stronger and reaches far from the indoor unit 100.

  In the present embodiment, the upper piece 2b of the front plate 2 forming the wall 16a of the bypass air guide passage 16 and the front piece 9Ab of the first drain pan 9A are in contact with the cold air flowing into the first heat exchanger 8A. Therefore, the bypass wind guide path 16 is forcibly cooled. For this reason, the substream warm air B2 passing through the detour air guide path 16 is further cooled by coming into contact with the wall body 16a, and the effect of suppressing the main stream warm air B1 from blowing up is further increased.

  Here, the upper piece 2b of the front plate 2 and the front piece 9Ab of the first drain pan 9A that form the wall body 16a of the bypass wind guide path 16 can lower the temperature of the sidestream warm air B2 as the thermal conductivity is higher. it can. For this reason, it is preferable to use a material having high thermal conductivity for the upper piece 2b and the front piece 9Ab and to form a heat exchange portion there. The material is preferably a metal such as a sheet metal. However, in the case of using a resin from the viewpoint of manufacturing, it is preferable to make the thickness as thin as the strength allows to increase the heat transfer coefficient.

  As described above, according to the indoor unit 100 of the present embodiment, the second air outlet 12B is formed in front of the first air outlet 12A, and the bypass air guide path from the first air outlet 12A to the second air outlet 12B. 16 and the bypass air duct 16 is configured to be communicated / blocked by the damper 14 so that the warm air can be effectively suppressed at low cost and the appearance design is restricted. Nor.

<Second embodiment>
FIG. 3 shows an indoor unit 200 according to the second embodiment of the present invention. The same components as those described in the indoor unit 100 in FIG. In the indoor unit 200 of the present embodiment, a substantially inverted L-shaped first guide plate 21 having an upper horizontal piece 21a, a vertical piece 21b, and a lower piece 21c is provided inside the lower portion of the suction grill 1, and the upper horizontal piece 21a It is attached so that the front end 21a1 faces the suction grill 1 and the lower piece 21c abuts on the front end 9Ab1 of the front piece 9Ab of the first drain pan 9A.

  Further, the second guide plate 22 is attached so as to enter the inside surrounded by the first guide 21 and the suction grill 1. The second guide plate 22 includes a vertical piece 22a whose upper end 22a1 faces the lower surface of the upper horizontal piece 21a of the first guide plate 21 in a non-contact manner, and a lower piece 22b whose rear end 22b1 contacts the lower plate 15, It is formed in a letter shape.

  By using the first guide plate 21 and the second guide plate 22 and the front piece 9Ab of the first drain pan 9A as a wall body 23a, a bypass air guide path from the opening 9Aa1 to which the damper 14 is attached to the second air outlet 12B. The path 23 has a folded shape. That is, the detour air guide path 23 includes a path 23b in a direction away from the second air outlet 12B in the path from the damper 14 to the second air outlet 12B.

  Thus, since the detour air guide path 23 includes the path 23b oriented away from the second air outlet 12B, a return path 23c corresponding to the path 23b is also added, so the detour air guide described with reference to FIG. Compared with the path 16, the path from the opening 9Aa1 to the second outlet 12B is longer, so the effect of naturally cooling the substream warm current B2 is increased. Further, since the total area of the first guide plate 21 in contact with the cold air flowing into the first heat exchanger 8A and the front piece 9Ab of the first drain pan 9A is increased, the first guide plate 21 and the front piece 9Ab are concerned. The amount of heat exchange in the heat exchange section formed by the above becomes larger, and the effect of forcibly cooling the substream warm flow B2 becomes larger.

  Therefore, during the heating operation, as shown in FIG. 4, the side flow warm air B2 introduced into the bypass air guide path 23 through the opening 9Aa1 where the opened damper 14 is located and blown out from the second outlet 12B is shown in FIG. Cools to a greater extent than indoor units. For this reason, the downward pressing effect with respect to the mainstream warm air B1 blown out from the first outlet 12A is increased, and the effect of suppressing the mainstream warm air B1 from being blown up is further increased.

  In the present embodiment, the first guide plate 21 that forms the wall 16a of the bypass air duct 16 and the front piece 9Ab of the first drain pan 9A are made of a material having high thermal conductivity, as in the first embodiment. It is preferable to use it.

100, 200, 300: indoor unit 1: suction grille 2: front plate, 2a: vertical piece, 2b: horizontal piece, 2c: rear end 3: top plate, 3a: suction port 4: back plate 5: bottom plate 6: Left side plate 7: Housing 8A, 8B, 8C: First to third heat exchangers 9A, 9B: First and second drain pans, 9Aa: Lower piece, 9Aa1: Open, 9Aa2: Tip, 9Ab: Front piece, 9Ac : Supporting piece, 9Ad: Rear piece 10: Blower fan 11: Blowing guide plate 12A, 12B: First and second outlets 13A, 13B: First and second vertical airflow direction plates, 13A1, 13B1: Shaft 14: Damper, 14a: Shaft 15: Lower piece 16: Detour air guide path, 16a: Wall body 21: First guide plate, 21a: Upper horizontal piece, 21a1: Front end, 21c: Lower piece 22: Second guide plate, 22a: Vertical piece 22a1: upper end, 22b: back end 23: detour air guide, 23a: Wall body, 23b, 23c: path 31: suction grille, 31a: lower piece 32: front plate 33A, 33B: first and second drain pans

Claims (6)

A suction port for sucking air, a heat exchanger for exchanging heat between the air sucked from the suction port and the refrigerant, a first blow-out port for blowing out the air heat-exchanged by the heat exchanger, and the first blow-out port, A blower fan that is arranged between the heat exchanger and blows air that has passed through the heat exchanger from the suction port to the first air outlet, and upper and lower air blown from the first air outlet In an indoor unit of an air conditioner having an up and down wind direction plate for adjusting the direction,
A second air outlet formed downward in front of the first air outlet, and a detour for cooling the air formed between the first air outlet and the blower fan and between the second air outlet. Air provided with an air guide path and a damper that blocks the bypass air guide path during cooling operation and guides part of the air blown from the blower fan to the bypass air guide path during heating operation The indoor unit of the harmony machine. In the indoor unit of the air conditioner according to claim 1,
The detour wind guide path is formed by a wall body, and at least a part of the wall body faces an air inflow side of the heat exchanger. The indoor unit of the air conditioner according to claim 2,
The indoor unit of an air conditioner, wherein the part of the wall body of the detour wind guide path includes a heat exchange unit. In the indoor unit of the air conditioner according to claim 2 or 3,
A drain pan that receives and discharges drain water generated in the heat exchanger is disposed at a lower portion of the heat exchanger, and the part of the wall body of the bypass air duct is also used as a part of the drain pan. An air conditioner indoor unit. In the indoor unit of the air conditioner according to any one of claims 1 to 4,
The detour wind guide path includes a path in a direction away from the second air outlet in a path from the damper toward the second air outlet. In the indoor unit of the air conditioner according to any one of claims 1 to 5,
A plurality of the wind direction plates are formed, and the wind direction plate close to the damper among the plurality of wind direction plates guides a part of the air blown from the blower fan forward during the cooling operation, and the air flow during the heating operation. An indoor unit of an air conditioner, wherein a part of air blown from a fan is guided to the bypass air guide path.

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