JP2021032498A - Air conditioner - Google Patents

Abstract

To solve the problem that an intermediate blade 15 located at a vertical center of a blowout port 3 becomes ventilation resistance to deteriorate blowing performance when three pieces of vertical blades 13 changing a blowout direction of air blowing out into a room through a blowout port 3 of an indoor unit 1 to a vertical direction.SOLUTION: An air conditioner includes a suction port, a blowout port, blowing means sucking air through the suction port and blowing out the air through the blowout port, and a heat exchanger subjecting the air sucked through the suction port to heat exchange. The blowout port is provided with lateral blades for separately blowing the blown-out air in a horizontal direction, and vertical blades for separately blowing the blown-out air in a vertical direction. The vertical blades comprise an upper blade, an intermediate blade and a lower blade arranged in the vertical direction. When the blade angles of the upper blade, the intermediate blade and the lower blade are the same, a space (B) between the intermediate blade and the lower blade is made wider than a space (A) between the upper blade and the intermediate blade.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an indoor unit of an air conditioner.

Patent Document 1 discloses an indoor unit of an air conditioner having three upper and lower blades. This air conditioner includes three upper and lower blades, an upper blade, a middle blade, and a lower blade.

Japanese Unexamined Patent Publication No. 2018-91585

This disclosure solves the conventional problem that the air blowing performance is deteriorated because the middle blade is provided in the substantially center of the air outlet where the air velocity is high and the mainstream exists, and the air blowing performance can be improved. Provide an air conditioner that can.

In order to explain the above problems, the air conditioner of the present invention has a suction port, an air outlet, an air blowing means for sucking air from the suction port and blowing air from the air outlet, and heat exchange with the air sucked from the suction port. The air outlet has left and right blades for blowing the air blown out from the air outlet in the left-right direction and upper and lower blades for blowing the air in the vertical direction. It is provided with three blades, an upper blade, a middle blade, and a lower blade, which are arranged in the vertical direction, and the distance between the middle blade and the lower blade is wider than the distance between the upper blade and the middle blade.

As a result, the ventilation performance can be improved and energy can be saved.

The air conditioner in the present disclosure can provide an air conditioner having high ventilation performance even if the air conditioner has three blades, an upper blade, a middle blade, and a lower blade at the air outlet.

Sectional drawing of the indoor unit of the air conditioner according to Embodiment 1. Numerical analysis (simulation) diagram comparing the ventilation performance depending on the position of the middle blade of the indoor unit of the air conditioner according to the first embodiment.

At the time when the inventors came up with the present disclosure, the indoor unit of the air conditioner was an air conditioner with the issue of how to finely blow air into the indoor space to improve the comfort of the user. It was common to devise the configuration of the wind direction blades of the air outlet, for example, to provide three blades arranged one above the other and to finely control the blowing direction.

Under such circumstances, the inventors go beyond simply increasing the number of blades to control the wind direction, and where to place the optimum position of the middle blades so that the ventilation performance is not deteriorated even if the number of blades is increased to three. I got the question of whether it would be optimal if it was placed. Then, the inventors have come to construct the subject matter of the present disclosure in order to solve the problem.

Therefore, the present disclosure includes a suction port, an air outlet, an air blowing means for sucking air from the suction port and blowing air from the air outlet, and a heat exchanger for exchanging heat with the air sucked from the suction port. Has left and right blades for blowing air blown out from the air outlet in the left-right direction and upper and lower blades for blowing air in the vertical direction. By providing three lower blades and making the distance between the middle blade and the lower blade wider than the distance between the upper blade and the middle blade, an air exchanger having three blades and good ventilation performance is provided.

Hereinafter, embodiments will be described in detail with reference to the drawings. However, more detailed explanation than necessary may be omitted. For example, detailed explanations of already well-known matters or duplicate explanations for substantially the same configuration may be omitted.

It should be noted that the accompanying drawings and the following description are provided for those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

(Embodiment 1)
Hereinafter, embodiments of the present invention will be described with reference to the drawings. The present invention is not limited to this embodiment.

The air conditioner according to the first embodiment of the present invention is a so-called separate type air conditioner in which the indoor unit and the outdoor unit are connected to each other by a refrigerant pipe, a control wiring, or the like. A heat pump is composed of an indoor unit and an outdoor unit, and the outdoor unit is provided with a compressor. The indoor unit is a wall-mounted indoor unit that is attached to the wall surface of the room.

FIG. 1 is a cross-sectional view of an indoor unit of an air conditioner according to the first embodiment of the present invention. FIG. 2 is a numerical analysis (simulation) diagram comparing the ventilation performance depending on the position of the middle blade of the indoor unit of the air conditioner.

In FIG. 1, the main body 1 of the indoor unit includes a front opening 2a and an upper surface opening 2b serving as air suction ports, and an air outlet 3 for blowing out heat-exchanged air.

Inside the main body 1 of the indoor unit, there is a filter 5 for removing dust contained in the indoor air, a heat exchanger 6 for heat exchange of the sucked indoor air, and a heat exchanger 6 for heat exchange and an outlet. Control to control the operation of the blower means 7, which is a once-through fan for generating an air flow from 3 to the room, the motor (not shown) for driving the blower means 7, the motor, and other components described below. The device 9 is provided.

Further, in the main body 1 of the indoor unit, the ventilation passage 10 from the openings 2a and 2b through the ventilation means 7 to the air outlet 3 is arranged on the downstream side of the ventilation means 7 to guide the air flow with the rear guider 11. A stabilizer 12 arranged to face the rear guider 11 and inner walls (not shown) on both side surfaces of the main body 1 of the indoor unit are provided.

The air outlet 3 is provided with an upper blade 14, a middle blade 15, and a lower blade 16 as upper and lower blades 13 that open and close the air outlet 3 and change the blowing direction of the air blown into the room in the vertical direction. ..
Further, the upper left and right blades 17 and the lower left and right blades 18 that change the blowing direction of the air blown into the room to the left and right are between the upper blade 14 and the middle blade 15, and between the middle blade 15 and the lower blade 16, respectively. It is provided in.

The operation and operation of the air conditioner configured as described above will be described below.
When the air conditioner starts operation, the upper and lower blades 13 rotate to open as shown in FIG. 1, and the air blower 7 is driven to suck the wind sucked from the front opening 2a and the upper opening 2b. After passing through the filter 5 and the heat exchanger 6, the air is blown out from the air outlet 3 through the ventilation passage 10. The wind blown out can be sent to any place in the room by changing the blade angles of the upper and lower blades 13, the upper left and right blades 17, and the lower left and right blades 18 in the vertical direction and the horizontal direction, respectively.

The upper and lower blades 13 are composed of three blades, an upper blade 14, a middle blade 15, and a lower blade 16, and by changing the angle of each blade, the wind is blown in any two directions in the vertical direction in the room. be able to. In particular, as compared with the case where the upper and lower blades 13 are two, the user can see either the upper direction in the room (or a position far from the air conditioner) or the lower direction in the room (or a position closer to the air conditioner). You can have more choices of blowing the wind. In addition, since the left and right blades for blowing in the left-right direction also include the upper left and right blades 17 and the lower left and right blades 18, the left and right blades are blown in two directions in the vertical direction and are blown in any of the two directions. It is possible.

Specifically, for example, while tilting the blade angles of the upper blade 14 and the middle blade 15 so as to blow upward, the blade angle of the lower blade 16 is lowered so as to blow downward, and the upper left and right blades 17 are further blown air. By directing the lower left and right blades 18 to the right when viewed from the harmonizer 1, the wind can be sent to the right back and front left of the room when viewed from the air harmonizer 1. By such an operation, when there are a plurality of users in the room, it is possible to blow in the direction preferred by each person.

In this way, when there are three upper and lower blades 13 and two sets of left and right blades, there is a choice of indoor locations where the upper and lower blades 13 can be blown at the same time compared to the case of two upper and lower blades 13 or one set of left and right blades. Increases and improves comfort for the user.
This allows each user to, for example, have a person who likes to receive direct wind and a person who does not like it in the same room, or a person who has the same preference for direct wind in a remote location in the same room. It is possible to provide the desired wind.

Here, by arranging the upper surface of the lower blade 16 so as to be located on the extension line of the rear guider 11, the wind flowing from the rear guider smoothly flows on the upper surface of the lower blade 16 and is convenient for the ventilation performance. However, the extension line of the rear guider 11 and the upper surface of the lower blade 16 do not necessarily have to be in a straight line, and the upper surface of the lower blade 16 may be slightly lowered as compared with the extension line of the rear guider 11. Further, the installation position of the lower blade 16 having the best ventilation performance changes depending on the blade angle of the lower blade 16.

In FIG. 1, when the blade angles of the upper blade 14, the middle blade 15, and the lower blade 16 are the same, the distance (B) between the middle blade 15 and the lower blade 16 is set to the distance between the upper blade 14 and the middle blade 15 (A). ) Should be wider than. Since the wind blown out from the outlet is mainly the wind along the scroll, the interval (B) is wider than the interval (A), and the interval (B) with a larger air volume is wider. This is because the performance is improved.

In FIG. 2, the figure of A> B on the left shows the numerical analysis performed under the condition that the position of the middle blade 15 is arranged closer to the lower blade 16 and the interval (A) is wider than the interval (B). In the figure of B <A on the right, the middle blade 15 is arranged on the upper blade 14 and the numerical analysis is performed under the condition that the interval (B) is wider than the interval (A).

The arrows in the figure represent the wind vector, and the longer the arrow, the faster the wind speed, and the higher the density of the long arrows, the wider the region where the wind speed is fast. Further, the blade angles of the upper blade 14, the middle blade 15, and the lower blade 16 are all the same. Comparing the two figures on the left and right of FIG. 2, when comparing the density of the arrows in the portion sandwiched between the middle blade 15 and the lower blade 16 of the interval (B), it is compared with A> B on the left. It can be seen that the density of the arrows at the interval (B) is higher when A <B on the right. In this way, when the interval (B) is widened, the density of the arrows increases, so it can be seen that the mainstream of the wind is in the area of the interval (B) at the outlet 3, and A <B is better than A> B. However, it became clear that the ventilation performance was improved.

As a method of measuring the interval (A) and the interval (B), for example, when the upper and lower surfaces of the upper blade 14 and the middle blade 15 are substantially parallel and the cross-sectional shape is substantially straight, and the cross section of the upper surface of the lower blade 16 is formed. When the shape is substantially straight, when the respective blades have the same angle, the length of the perpendicular line drawn from the lower surface of the upper blade 14 to the upper surface of the middle blade 15 is the interval (A), and the length from the lower surface of the middle blade 15 to the lower blade is set. The length of the perpendicular line drawn on the upper surface of 16 is defined as the interval (B).

On the other hand, if the upper and lower surfaces of the upper blade 14 and the middle blade 15 are not parallel, or the cross-sectional shape is not straight, or if the cross-sectional shape of the upper surface of the lower blade 16 is not straight, the three blades of the upper and lower blades 13 When the cross-sectional shapes of the upper surface and the lower surface are not straight but curved, for example, the upstream end and the downstream end of the lower surface of the upper blade 14 are connected by a straight line, and the upstream end and the downstream end of the upper surface of the middle blade 15 are connected. The blade angles of the upper blade 14 and the middle blade 15 are matched so that the parallel lines are at the same angle, and the line connecting the upstream end and the downstream end of the lower surface of the middle blade 15 and the upstream end of the upper surface of the lower blade 16 After adjusting the blade angle of the lower blade 16 so that the line connecting the lower blade and the downstream end have the same angle, the line connecting the upstream end and the downstream end of the lower surface of the upper blade 14 and the upstream end of the upper surface of the middle blade 15 The length of the line connecting the downstream ends is the interval (A), and the length of the line connecting the upstream end and the downstream end of the lower surface of the middle blade 15 and the length of the line connecting the upstream end and the downstream end of the upper surface of the lower blade 16 Let it be the interval (B).

The three upper and lower blades 13, the upper blade 14, the middle blade 15, and the lower blade 16, may each be composed of one blade in the longitudinal direction (horizontal direction) of each blade, two blades, or the like. It may be divided into a plurality of sheets. When it is divided, the choice of the position where the wind blown from the indoor unit 1 is blown in the vertical direction (or the front-back direction of the room) is further expanded.

Further, the upper left and right blades 17 and the lower left and right blades 18 are each composed of a plurality of blades, and the plurality of blades are attached to the stabilizer 12 and the lower blade 16 substantially in parallel, and one of them is attached at an angle. When the direction is changed around the rotation axis in the left-right direction, the other left and right blades are also configured to face the same angle. At this time, for example, all the left and right blades of the upper left and right blades 17 have the same direction in the longitudinal direction. It may be configured to face, or it may be divided into two in the longitudinal direction, and each of the divided sets may be oriented in the left-right direction at the same angle, and the two sets may have different left-right angles. The same applies to the lower left and right blades 18. In the latter case, for example, one set of left and right blades on the right side of the air conditioner faces to the right, and another set of left and right blades on the left side faces to the left. It can be blown in the direction. As a result, the choice of the position where the wind blown from the indoor unit 1 is blown in the left-right direction is further expanded.

The length of the middle blade 15 of the three upper and lower blades 13 is shorter than that of the upper blade 14 and / or the lower blade 16. Since the middle blade 15 is located near the center of the air outlet 3, the short middle blade 15 can reduce the area where the middle blade 15 obstructs the flow of wind, so that the ventilation resistance in the vicinity of the air outlet 3 can be reduced. As a result, the air blowing performance of the air blown from the air outlet 3 can be further improved, and the rotation speed of the air blowing means 7 and the motor input at the same air volume can be reduced. It saves energy.

Further, it is preferable that the length of the lower blade 16 is the longest among the three upper and lower blades 13. The upper surface of the lower blade 16 is located on an extension line from the rear guider 11 in the air passage 10, and after the wind exits from the air outlet 3 through the rear guider 11, the dynamic pressure is recovered along the lower blade 16. Therefore, due to the diffuser effect, the ventilation performance can be improved as compared with the case where the upper surface of the lower blade 16 is not on the extension line of the rear guider 11. In addition, by lengthening the lower blade 16 provided so that the upper surface is located on the extension line of the rear guider 11, the diffuser effect can be further obtained, and the ventilation performance is further improved. In this way, by making the lower blade 16 the longest among the three upper and lower blades 13, the ventilation performance is improved and energy is saved. In particular, as described above, by shortening the middle blade 15 and lengthening the lower blade 16, the diffuser effect can be obtained while reducing the ventilation resistance near the center of the air outlet 3, so that the ventilation performance can be improved and energy can be saved. it can.

As described above, in the air conditioner according to the present invention, of the three upper and lower blades provided at the outlet of the indoor unit, the distance between the middle blade and the lower blade is larger than the distance between the upper blade and the middle blade. It is useful for air conditioners used for business purposes and general households because it is widened to improve ventilation efficiency.

1 Main body of indoor unit 2a Front opening (suction port)
2b Top surface opening (suction port)
3 Air outlet 5 Filter 6 Heat exchanger 7 Blower 9 Control device 10 Ventilation path 11 Rear guider 12 Stabilizer 13 Upper and lower blades 14 Upper blades 15 Middle blades 16 Lower blades 17 Upper left and right blades 18 Lower left and right blades

Claims (3)

The air outlet is provided with a suction port, an air outlet, a blower means for sucking air from the suction port and blowing air from the air outlet, and a heat exchanger for exchanging heat with the air sucked from the suction port. Has left and right blades for blowing air blown out from the outlet in the left-right direction and upper and lower blades for blowing air in the vertical direction, and the upper and lower blades are upper blades and middle blades arranged in the vertical direction. An air exchanger comprising three lower blades, wherein the distance between the middle blade and the lower blade (B) is wider than the distance between the upper blade and the middle blade (A). The air conditioner according to claim 1, wherein the middle blade has a shorter length in the wind flow direction than the upper blade and / or the lower blade. The air conditioner according to any one of claims 1 or 2, wherein the lower blade is the longest among the upper blade, the middle blade, and the lower blade.

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