JP2014095496A - Indoor unit of air conditioner - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an indoor unit of an air conditioner having high air-blow performance.SOLUTION: The tip of a tongue part 14 of a stabilizer 3 constituting an air-blow channel of a cross-flow fan is formed to be a substantially circular-arc and a groove 15 is disposed in a direction vertical to the radial direction which divides the substantially circular-arc into substantially two equal parts on the tip of the tongue part. Therein, the groove 15 has a constitution formed so as to repeat a recessed part and a protruded part on an area in which the air speed of blowing wind is high other than areas in which the air speed of blowing wind from an outlet in the cross-flow fan longitudinal direction is low. Thereby, part of wind flowing out of the cross-flow fan collides against the stabilizer 3, the flow of wind when again returning to the cross-flow fan is improved and, on a low air speed part on which the energy loss due to installation of the groove 15 is larger than improvement of the flow, the groove 15 is not disposed and, as the result, an indoor unit of an air conditioner in which air-blow performance is improved and a fan motor input is reduced, that is, high air-blow performance is provided, can be provided.

Description

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

  Generally, since an indoor unit of an air conditioner is installed in a room, a noise reduction configuration is adopted (for example, see Patent Document 1).

  FIG. 6 shows an indoor unit of an air conditioner described in Patent Document 1. The indoor unit includes a front grill 51, an air filter 52, an indoor heat exchanger 53, a cross flow fan 54, a water receiver 55, a stabilizer 56, left and right blades 57, upper and lower blades 58, and a rear guider 61. ing. A flow is generated by the rotation of the cross flow fan 54, and the air sucked from the front grill 51 through the air filter 52 exchanges heat with the refrigerant in the indoor heat exchanger 53, and then formed by the stabilizer 56 and the rear guider 61. The air passes through the air blowing path, crosses the left and right blades 57 and the upper and lower blades 58, and blows out air from the outlet 60 to the room where the indoor unit is installed.

  Here, the stabilizer 56 has an arc shape in which a cross-sectional shape in a direction perpendicular to the axis of the cross flow fan 54 is parallel to the cross flow fan 54 and is orthogonal to the axis of the cross flow fan 54. In addition, the cross section cut along a plane parallel to the axis of the crossflow fan 54 has a shape in which rectangular convex portions and concave portions are alternately repeated. Therefore, the circulating flow returning from the stabilizer 56 back to the cross flow fan 54 passes through different flow paths corresponding to the rectangular convex portions and the concave portions, and the winds passing through the different flow passages intermittently have a time difference. Since it crosses the 54 blades, the frequency of the wing pitch sound is dispersed, and it is possible to reduce the wing pitch sound that is audibly deaf.

Japanese Examined Patent Publication No. 7-52016

  However, in the configuration of the conventional indoor unit described above, the shape in which the convex portion and the concave portion provided in the longitudinal direction of the cross flow fan facing surface of the stabilizer 56 are repeated causes the flow of wind at the convex portion to be different from the flow of wind at the concave portion. This is provided to cause a time difference between the time when the wind reaches the stabilizer 56 and the time when it reaches the blades of the cross flow fan 54. Although the noise value can be lowered, the effect of improving the blowing performance (for blowing The problem that the fan motor input reduction effect) cannot be obtained remains.

  This invention is made | formed in view of such a point, and provides the indoor unit of an air conditioner with high ventilation performance.

  In order to solve the conventional problems, an indoor unit of an air conditioner according to the present invention includes an indoor heat exchanger, a crossflow fan, a stabilizer, a rear guider, and an outlet from which wind is blown out. The tip of the tongue is formed in a substantially arc shape, and a groove is provided in the tip of the tongue in a direction perpendicular to the radial direction that roughly bisects the substantially arc, and the groove is the outlet in the longitudinal direction of the cross flow fan. The concave portion and the convex portion are formed so as to be repeated only in the fast region among the fast region and the slow region of the blown wind from.

  As a result, in the part where the wind speed of the wind from the cross flow fan is fast, the wind flow when colliding with the stabilizer and returning to the cross flow fan is improved, so the air blowing performance is improved and the fan motor input is reduced. That is, it can be set as the indoor unit of an air conditioner with high ventilation performance. That is, in the concave portion of the tongue portion provided with the groove, the flow of air in the groove deteriorates due to the viscosity of the air itself and the resistance of the wall portion of the groove, forming a stagnation region, and the air accumulated in the stagnation region However, it comes to play a role of a cushion like an air cushion against the wind flowing toward the stabilizer. For this reason, when there is no groove in the tongue, the wind is peeled off at the moment of collision with the stabilizer made of solid (resin or metal, etc.), and the flow is disturbed. When the groove is provided, the energy at the time of collision is relaxed by the air accumulated in the stagnation region of the recess, and smoothly flows without causing separation and reaches the crossflow fan again as reflux. On the other hand, when the wind velocity from the outlet is slow and the energy when the wind collides with the stabilizer is small, for example, in the side wall portion, if a groove is provided to provide an air stagnation region, the energy loss becomes larger. No groove is provided here. As a result, the air blowing performance can be improved and the input of the fan motor for air blowing can be reduced, so that energy saving can be promoted. The synergistic action of these two parts improves the flow of wind when a part of the wind coming out of the crossflow fan collides with the stabilizer and returns to the crossflow fan. Energy saving can be promoted by reducing input.

  The indoor unit of the air conditioner of the present invention improves the blowing performance because a part of the wind coming out of the cross flow fan collides with the stabilizer and the flow of the wind when returning to the cross flow fan is improved. The fan motor input can be reduced, that is, the air conditioner indoor unit has high air blowing performance and high energy saving performance.

Sectional drawing which shows the indoor unit of the air conditioner in Embodiment 1 of this invention External perspective view of the indoor unit of the air conditioner The perspective view which shows the stabilizer of the indoor unit of the air conditioner Cross section of the stabilizer of the indoor unit of the air conditioner The perspective view which shows the stabilizer of the indoor unit of the air conditioner in Embodiment 2 of this invention. Sectional drawing which shows the indoor unit of the conventional air conditioner

  A first invention includes an indoor heat exchanger, a cross flow fan, a stabilizer, a rear guider, and a blowout port from which air is blown, and the tip of the tongue is formed in a substantially arc shape, and the tip of the tongue Is provided with a groove in a direction perpendicular to the radial direction that bisects the substantially circular arc, and the groove is the fastest or slowest of the blowout air blown from the blowout port in the longitudinal direction of the crossflow fan. Only the region is formed so that the concave portion and the convex portion are repeated.

As a result, air is first accumulated in the groove provided in the stabilizer due to its own viscosity and the resistance of the wall portion of the groove, and the air accumulated in this groove is generated when the wind flowing from the cross flow fan collides with the stabilizer. Since energy is relaxed, it is possible to create a smooth flow without disturbing the wind due to separation. As a result, the air blowing performance can be improved, the input of the fan motor for air blowing can be reduced, and energy saving can be promoted. In addition, the wind speed of the wind from the outlet is slow, and the energy when the wind collides with the stabilizer is reduced.For example, in the side wall portion, if a groove is provided to provide a stagnation region of the air, the energy loss becomes larger. Therefore, no groove is provided here. As a result, the air blowing performance can be improved and the input of the fan motor for air blowing can be reduced, so that energy saving can be promoted. And by these synergistic actions, the air blowing performance can be improved, the input of the fan motor for air blowing can be reduced, and the energy saving can be promoted.

  The second invention includes an indoor heat exchanger, a cross flow fan, a stabilizer, a rear guider, and a blowout port from which wind is blown, and the tongue portion tip of the stabilizer is formed in a substantially arc shape, and the tongue portion A groove is provided at the tip in a direction perpendicular to the radial direction that roughly bisects a substantially circular arc, the groove is formed to repeat a recess and a protrusion in the longitudinal direction of the crossflow fan, and the recess and the The convex portions are configured differently in a region where the wind speed of the blowing air from the outlet is high and a region where the air velocity is slow.

  Thus, as in the first aspect of the invention, the energy at the time of the collision with the stabilizer is eased at the portion where the wind speed is high, so that a smooth flow can be created without turbulence of the wind due to separation, and the air blowing performance is improved. be able to. And by optimizing the groove shape and dimensions even in areas where the wind speed is slow, the energy loss due to the air stagnation area caused by providing the groove is minimized, and the effect of preventing wind separation is improved and the air blowing performance is improved. Energy saving can be promoted by reducing the input of the fan motor for blowing air.

  According to a third aspect, in the first or second aspect, the central portion in the longitudinal direction of the cross flow fan is a region having a high wind speed, and the side wall portion of the cross flow fan is a region having a low wind speed.

  As a result, similar to the first and second inventions, it is possible to improve the air blowing performance and reduce the fan motor input.

  According to a fourth invention, in the first to third inventions, the bottom shape of the groove repeated in the longitudinal direction of the cross flow fan is a flat surface.

  Thereby, it becomes easy to keep a stagnation area | region in the tongue part vicinity, and to hold | maintain the stagnation area | region, and it can improve ventilation performance more.

  According to a fifth invention, in the first or third invention, the concave portion and the convex portion provided in the longitudinal direction of the cross flow fan are configured such that the width A of the concave portion is equal to or less than the width B of the convex portion.

  This makes it easier to form a stagnation region near the tongue while suppressing an increase in flow resistance due to the recess, and the flow of the air cushion is increased and the collision with the tongue of the stabilizer can flow more smoothly downstream. The performance can be further improved.

  According to a sixth aspect of the present invention, in the first or third aspect of the invention, the width A of the concave portion and the width B of the convex portion provided in the longitudinal direction of the cross flow fan are the same as the width A of the concave portion and the width B of the convex portion. It is set as the structure made into the same shape altogether over the longitudinal direction.

  Thereby, the speed distribution of the uneven | corrugated structure part of a cross flow fan longitudinal direction becomes a substantially uniform flow, and can improve a ventilation performance further.

  According to a seventh aspect of the present invention, in the first or third aspect of the invention, the depth C of the groove that forms the concave portion and the convex portion in the longitudinal direction of the cross flow fan is the same depth in the longitudinal direction of the cross flow fan. is there.

Thereby, the stagnation area | region of the substantially same magnitude | size can be formed in the uneven | corrugated structure part whole area of a cross flow fan longitudinal direction, and the further improvement of ventilation performance is attained.

  In an eighth aspect of the invention, in particular, in the second or third aspect of the invention, the distance between the convex portion and the concave portion is different between a region where the wind speed from the outlet is high and a region where the wind speed is slow.

  As a result, the air blowing performance is improved by changing the optimum dimensions and shape of the groove in the vicinity of the side wall where the wind speed is low, for example, in the vicinity of the side where the wind speed is high, for example, and the other part is high, and the input of the fan motor is reduced. This will enable further energy saving.

  In the ninth invention, in particular, in the second, third, or eighth invention, the depth of the groove forming the convex portion and the concave portion is different between the region where the wind speed from the blowout port is fast and the region where the wind speed is slow. .

  As a result, the air blowing performance is improved by changing the optimum dimensions and shape of the groove in the vicinity of the side wall where the wind speed is slow, for example, and the other part where the wind speed is fast, for example, the center portion, and the input of the fan motor for air blowing is reduced. This will enable further energy saving.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
FIG. 1 is a sectional view showing an indoor unit of an air conditioner according to Embodiment 1 of the present invention, and FIG. 2 is an external perspective view of the indoor unit of the air conditioner.

  1 and 2, the indoor unit includes an indoor heat exchanger 1, a crossflow fan 2, a stabilizer 3, a rear guider 4, left and right blades 5, an upper blade 6, a lower blade 7, and an air filter 8. have. Then, the cross flow fan 2 is rotated to suck air from the front suction port 9 and the upper suction port 10 and exchange heat with the refrigerant in the indoor heat exchanger 1, and then formed by the stabilizer 3 and the rear guider 4. The air is blown out from the blowout port 11 to the room where the indoor unit 13 is installed. In addition, 12 shown in FIG. 2 is the left and right side walls in the outlet 11 of the indoor unit.

  FIG. 3 is a perspective view showing the stabilizer 3 of the indoor unit of the air conditioner, and FIG. 4 is a cross-sectional view of the stabilizer 3.

  3 and 4, the tip of the tongue 14 of the stabilizer 3 is formed in a substantially arc shape, and a groove 15 is provided in a direction perpendicular to the radial direction that divides the substantially arc shape into approximately two equal parts, and the cross section is crossed. The flow fan 2 has a shape in which the concave and convex portions are repeated in the longitudinal direction.

  In the indoor unit of the air conditioner having the stabilizer 3 having such a tongue configuration, the air flow as described above is generated in the indoor unit of the air conditioner when the cross flow fan 2 rotates. The wind flow that collides with

That is, when the width and depth of the groove 15 are sufficiently small, in the recess formed by providing the groove 15, the air flows poorly in the groove 15 due to the viscosity of the air itself and the resistance of the wall portion of the groove 15. Thus, the stagnation region is formed, and the air accumulated in the stagnation region plays a role of a cushion such as an air cushion against the wind flowing toward the stabilizer. Therefore, when there is no groove 15 in the tongue portion 14, when the wind collides with the stabilizer 3 made of solid (resin or metal, etc.), the flow is disturbed due to the momentum, and the groove 15 is provided. As a result, the air accumulated in the stagnation region relaxes the energy at the time of collision, flows smoothly without causing separation, and reaches the crossflow fan 2 again as reflux. As a result, a part of the wind emitted from the cross flow fan 2 collides with the stabilizer 3 and the flow of the wind when returning to the cross flow fan 2 again is improved, and the air blowing performance is improved.

  On the other hand, in the flow that collides with the stabilizer 3, the wind flowing in the vicinity of the side wall 12 of the outlet 11 is slow due to the resistance of the side wall 12, and the energy when the wind collides with the stabilizer is small. When the groove 15 is provided, the energy loss when the wind collides with the portion where the air is accumulated and the stagnation region is formed becomes larger than the effect obtained when the disturbance of the flow due to the separation after the collision is eliminated. Therefore, as shown in FIG. 3, the groove 15 is not provided in the vicinity of the side wall 12 of the outlet 11 of the stabilizer 3. Thereby, it is possible to eliminate the loss caused by providing the groove 15 in the vicinity of the side wall where the wind speed is slow. That is, compared with the case where the concave portion and the convex portion are repeatedly provided in the longitudinal direction of the cross flow fan 2 facing surface of the stabilizer 3, the air blowing performance can be improved, the fan motor input can be reduced, and energy saving is promoted. it can.

  And this indoor unit combines the actions of both of the above, so that the flow of wind when a part of the wind coming out of the cross flow fan collides with the stabilizer and returns to the cross flow fan again improves the air blowing performance. It is possible to improve and reduce fan motor input.

  Here, in the configuration of the indoor unit 13, when the wind speed near the side wall 12 is faster than the central portion, conversely, the groove 15 is provided only in the vicinity of the side wall 12 and is not provided in the center. Thus, the same effect as described above can be obtained. That is, the above-described effect can be obtained by providing the groove 15 in the portion where the wind speed of the wind from the outlet 11 is high and not providing the groove 15 in the portion where the wind speed is slow.

  The vicinity of the side wall 12 of the outlet 11 where the wind speed increases in the longitudinal direction of the stabilizer 3 refers to the following range. For example, the cross flow fan 2 is composed of a combination of divided parts called a plurality of (for example, 8 to 9) series (not shown) in the longitudinal direction (not shown), and indicates the length of one each of the left and right of the series, No groove is provided in this range. In addition, it refers to a length of 10 to 20% of the length of the stabilizer 3 in the longitudinal direction, and no groove is provided in this range.

  Further, in this embodiment and the second embodiment described below, in the groove 15 provided in the tongue portion 14, when the bottom shape of the groove 15 repeated in the longitudinal direction of the cross flow fan 2 is a curved surface, The stagnation region formed in the vicinity of the tongue portion 14 is difficult to be held. Therefore, in each of these embodiments, the bottom shape of all the grooves 15 repeated in the longitudinal direction of the cross flow fan 2 is a flat surface, so that it is easy to keep the stagnation region in the vicinity of the tongue portion 14 and hold the stagnation region. Thus, the air blowing performance can be improved more reliably.

  Further, in the first embodiment, in the groove 15 provided in the tongue portion 14, when the width A of the concave portion is large, it tends to be resistant to the flow. Therefore, in this embodiment, the width A of the concave portion is set to be equal to or smaller than the width B of the convex portion, thereby making it easier to form a stagnation region in the vicinity of the tongue portion 14 while suppressing an increase in resistance. As a result, the action of the air cushion is enhanced, and the flow that collides with the tongue portion 14 of the stabilizer 3 is allowed to flow more smoothly downstream so that the blowing performance can be further improved.

  Similarly, in the groove 15 provided in the tongue portion 14, when the width A of the concave portion and the width B of the convex portion that are repeated in the longitudinal direction of the cross flow fan 2 are different from each other, the velocity distribution in the longitudinal direction of the cross flow fan 2 is different. However, a different flow occurs. Therefore, in this embodiment, the widths A of the recesses are all the same and the widths B of the projections are all the same, so that the velocity distribution is almost uniform in the longitudinal direction of the crossflow fan, The air blowing performance can be further improved.

  Further, in the groove 15 provided in the tongue portion 14, when the depth C of the groove 15 repeated in the longitudinal direction of the cross flow fan 2 is different, the stagnation region formed in the vicinity of the tongue portion 14 is the cross flow fan 2. It will have different thicknesses in the longitudinal direction. For this reason, in this embodiment, the depths C of all the grooves 15 are made equal, thereby forming a stagnation region with less unevenness having a thickness substantially equal to the longitudinal direction of the cross flow fan 2. It is possible to further improve the blowing performance.

(Embodiment 2)
FIG. 5 is a perspective view showing a stabilizer of the indoor unit of the air conditioner according to the second embodiment. Hereinafter, only the configuration and operational effects of the parts different from the first embodiment will be described.

  In FIG. 5, the concave portion and the convex portion provided at the tip of the tongue portion 14 of the stabilizer 3 so as to repeat in the longitudinal direction of the cross flow fan 2 are different between the portion where the wind speed of the wind blown from the blowout port 11 is fast and the slow portion. It is. For example, in this embodiment, the shape, size, and interval are different between the vicinity of the side wall 12 where the wind speed is slow and the central part where the wind speed is fast.

  That is, the width and depth of the groove 15 may be changed between a portion with a low wind speed near the side wall 12 and a portion with a high wind speed at the other central portion, or the shape of the groove 15 may be changed as necessary. The air blowing performance is further improved by setting the optimal size, shape, and spacing of the groove 15 according to each of the slow wind speed portion near the side wall 12 and the fast wind speed portion of the central portion. It is possible to reduce energy consumption and promote energy saving.

  Specifically, in FIG. 5, the width D of the groove 15 in the portion where the wind speed is low near the side wall 12 of the outlet 11 is narrower than the width A of the groove 15 in the portion where the wind speed is high in the center. This is because the air accumulated in the stagnation region in the groove 15 in the vicinity of the side wall 12 where the wind speed is slow relaxes the energy of the wind that collides toward the stabilizer 3 and suppresses the disturbance of the flow due to separation after the collision, This is because it is not as large as the central part.

  Further, the same effect can be obtained when the size of the convex portion E in the portion of the air outlet 11 in FIG. 5 near the side wall 12 where the wind speed is slow is longer than the size of the convex portion B in the central portion where the wind speed is fast. .

  Furthermore, the dimension of the convex part E of the slow wind speed portion in the vicinity of the side wall 12 of the air outlet 11 of FIG. 5 is made longer than the dimension of the convex part B of the central part where the wind speed is fast, and the side wall 12 of the air outlet 11. There is also a method in which the size of the width D of the groove 15 in the vicinity of the portion where the wind speed is slow is the same as the size of the width A of the groove 15 in the portion where the wind speed is fast in the center.

  The same effect can be obtained by making the depth of the groove 15 near the side wall 12 of the blowout outlet 11 shallower than the depth of the groove 15 at the central portion where the wind speed is high.

  On the other hand, if the wind speed near the side wall 12 is faster than the central part due to the configuration of the indoor unit, conversely, the width of the groove 15 near the side wall 12 is reduced and the depth is reduced, and the groove 15 in the central part is reduced. By adopting a configuration in which the width is increased and the depth is increased, the same effect as described above can be obtained.

  As described above, the indoor unit of the air conditioner according to the present invention improves the flow of wind when a part of the wind emitted from the crossflow fan collides with the stabilizer and returns to the crossflow fan. Improve performance and reduce fan motor input, that is, air conditioner indoor unit with high air blowing performance and high energy saving, air blowing related technology such as air conditioner with cross flow fan and stabilizer, and Applicable to products, equipment and parts.

DESCRIPTION OF SYMBOLS 1 Indoor heat exchanger 2 Cross flow fan 3 Stabilizer 4 Rear guider 11 Outlet 13 Indoor unit 14 Tongue part 15 Groove

Claims (9)

An indoor heat exchanger, a cross-flow fan, a stabilizer, a rear guider, and a blow-out port from which wind is blown are formed, and the tip of the tongue of the stabilizer is formed in a substantially circular arc, and the substantially circular arc is formed in the tip of the tongue A groove is provided in a direction perpendicular to the radial direction that roughly bisects the groove, and the groove is recessed only in an early region of the fast and slow regions of the blown air blown from the outlet in the longitudinal direction of the crossflow fan. And air conditioner indoor unit formed to repeat the convex part. An indoor heat exchanger, a cross-flow fan, a stabilizer, a rear guider, and a blow-out port from which wind is blown are formed. The tip of the tongue of the stabilizer is formed in a substantially arc shape, and the stabilizer has a substantially arc shape. A groove is provided in a direction perpendicular to the radial direction that bisects, the groove is formed so as to repeat a concave portion and a convex portion in the longitudinal direction of the cross flow fan, and the concave portion and the convex portion are formed in the outlet port. The indoor unit of the air conditioner which was made into the structure which differs in the area | region where the wind speed of the blowing wind from a wind is early and slow. The indoor unit of an air conditioner according to claim 1 or 2, wherein a central portion in the longitudinal direction of the cross flow fan is a region having a high wind speed, and a side wall portion of the cross flow fan is a region having a low wind speed. The indoor unit of an air conditioner according to any one of claims 1 to 3, wherein a bottom shape of a groove repeated in the longitudinal direction of the cross flow fan is a plane. The indoor unit of the air conditioner according to claim 1 or 3, wherein the concave portion and the convex portion provided in the longitudinal direction of the cross flow fan have a width A of the concave portion equal to or less than a width B of the convex portion. The width A of the concave portion and the width B of the convex portion provided in the longitudinal direction of the cross flow fan are both equal in shape to the width A of the concave portion and the width B of the convex portion in the longitudinal direction of the cross flow fan. The indoor unit of the air conditioner described in 3. The indoor unit of an air conditioner according to claim 1 or 3, wherein the depth C of the groove forming the concave portion and the convex portion in the longitudinal direction of the cross flow fan is all equal in the longitudinal direction of the cross flow fan. The indoor unit of the air conditioner according to claim 2 or 3, wherein the interval between the convex portion and the concave portion is different between a region where the wind speed of the wind from the outlet is fast and a region where the wind velocity is slow. The indoor unit of an air conditioner according to claim 2, 3 or 8, wherein the depth of the groove forming the convex part and the concave part is different between a region where the wind speed from the outlet is fast and a region where the wind speed is slow.

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