JP6671308B2 - Air conditioner indoor unit - Google Patents

Description

  TECHNICAL FIELD The present invention relates to an indoor unit of an air conditioner capable of uniforming an uneven wind speed distribution generated on a downstream side of a blower.

  BACKGROUND ART Conventionally, there has been an indoor unit of an air conditioner in which a blower and a heat exchanger are housed in a casing. For example, the air conditioner disclosed in Patent Document 1 has a casing in which an intake port is formed in an upper part and an outlet is formed in a lower part of a front surface part, and an axial flow type provided in a downstream side of the intake port in the casing. A diagonal flow type blower, and a heat exchanger that is provided downstream of the blower in the casing and upstream of the blower outlet and exchanges heat between the air and the refrigerant blown out from the blower, Configuration.

Japanese Patent No. 5425106

  The indoor unit of the air conditioner disclosed in Patent Document 1 has a configuration in which the wake of the air blower passes through the vicinity where the heat exchanger and the air blower are closest to each other, and passes through other parts. There is a possibility that a non-uniform wind speed distribution may occur in the rotation direction on the downstream side. In particular, when the structure installed downstream of the blower is a heat exchanger, a region where the wind speed is high appears in a portion where the heat exchanger and the blower are close to each other, and the performance of the heat exchanger may deteriorate. There is a possibility of inviting. Further, even when the equipment arranged downstream of the blower is not a heat exchanger, a large wind speed distribution may increase the pressure loss if there is a region where the wind speed is partially high, which may cause a decrease in performance of the equipment. .

  The present invention has been made in order to solve the above-described problem, and has a non-uniform wind speed distribution generated in the rotation direction on the downstream side of the blower, which is uniformed, and a device arranged on the downstream side of the blower. It is an object of the present invention to provide an indoor unit of an air conditioner that can prevent performance degradation of the air conditioner.

An indoor unit of an air conditioner according to the present invention includes a housing having an inlet and outlet, an internal of the housing, axial flow located downstream side of the suction plug mouth or mixed-flow -Type blower, and a heat exchanger that is provided on the downstream side of the blower in the housing and upstream of the blow-out port and exchanges heat blown from the blower with a refrigerant. The blower has a bell mouth, one opening of which is arranged to face the heat exchanger, and a blade installed on the inner peripheral side of the bell mouth and rotating around a rotation axis. The air sucked from the suction port is sent toward the heat exchanger and blown out from the outlet, and the heat exchanger has an inclined surface inclined with respect to a rotation axis of the blower. End portions of the heat exchanger and the bell mouth In the range of the end on the downstream side of the bell mouth located at a length of not more than half of the length at which the distance in the rotation axis direction of the blower is the maximum, for the bell mouth for the wind to escape radially An opening for a first bellmouth is formed as an opening, and is located at a position longer than half the length at which the distance in the rotation axis direction of the blower between the heat exchanger and the end of the bellmouth is maximized. In the range of the downstream end of the bell mouth, a second bell mouth opening is formed as a bell mouth opening for letting out wind in the radial direction, and the first bell mouth opening is formed. The opening area is larger than the opening area of the second bell mouth opening .

  According to the indoor unit of the air conditioner according to the present invention, the bell is located at a length equal to or less than half the length at which the distance between the heat exchanger and the end of the bell mouth in the rotation axis direction of the feeding device is the maximum. In the area of the end on the downstream side of the mouse, an opening for the bell mouth is formed to allow the wind to escape in the radial direction. Therefore, in the vicinity where the heat exchanger and the blower are closest, the opening for the bell mouth is provided. , A radial airflow that blows outward through the airflow can be generated. Therefore, since this indoor unit can reduce the region where the wind speed generated in the heat exchanger is high, the uneven wind speed distribution generated in the heat exchanger can be uniformed and the increase in pressure loss can be suppressed. In addition, the performance of the heat exchanger can be prevented from deteriorating.

FIG. 2 is a vertical sectional view showing the indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view showing a blower of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a perspective view showing a positional relationship between a blower and a heat exchanger of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 2 is an enlarged cross-sectional view of a main part of an inner peripheral surface side of a bellmouth constituting a blower of the indoor unit of the air conditioner according to Embodiment 1 of the present invention, which is developed in a plane. It is the principal part expanded sectional view which expanded and showed the inner peripheral surface side of the bell mouth which comprises the air blower of the indoor unit of the air conditioner which concerns on Embodiment 2 of this invention. FIG. 13 is an enlarged cross-sectional view of a main part, in which an outer peripheral surface side of a motor support unit that constitutes a blower of an indoor unit of an air conditioner according to Embodiment 3 of the present invention is developed in a plane. It is the principal part expanded sectional view which carried out plane development and showed the inner peripheral surface side of the bell mouth which comprises the air blower of the indoor unit of the air conditioner which concerns on Embodiment 4 of this invention. It is the principal part expanded sectional view which showed planarly the internal structure of the air blower of the indoor unit of the air conditioner which concerns on Embodiment 5 of this invention. FIG. 16 is an enlarged cross-sectional view of a main part of an inner peripheral surface side of a bellmouth constituting a blower of an indoor unit of an air conditioner according to Embodiment 6 of the present invention, which is developed in a plane.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the drawings, the same or corresponding portions are denoted by the same reference characters, and description thereof will be omitted or simplified as appropriate. Further, the configuration, size, arrangement, and the like of the configuration shown in each drawing can be appropriately changed within the scope of the present invention.

Embodiment 1 FIG.
FIG. 1 is a longitudinal sectional view showing the indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 2 is a longitudinal sectional view showing a blower of the indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 3 is a perspective view showing a positional relationship between a blower and a heat exchanger that constitute an indoor unit of the air conditioner according to Embodiment 1 of the present invention. FIG. 4 is a main part enlarged cross-sectional view showing the inner peripheral surface side of the bell mouth constituting the blower of the indoor unit of the air conditioner according to Embodiment 1 of the present invention, which is developed in a plane.

  The indoor unit 100 of the air conditioner according to Embodiment 1 supplies conditioned air to an area to be air-conditioned such as a room by using a refrigeration cycle for circulating a refrigerant. As shown in FIG. 1, the indoor unit 100 mainly has a housing 1 in which a suction port 10 for sucking indoor air into the inside and an air outlet 11 for supplying conditioned air to an area to be air-conditioned are formed. doing. The indoor unit 100 is housed in the housing 1, and is provided in a blower 2 that sucks room air from the inlet 10 and blows out conditioned air from the outlet 11, and an air passage from the blower 2 to the outlet 11. And a heat exchanger 9 for exchanging heat of air blown from the blower 2 with a refrigerant to produce conditioned air. An air path communicates with the inside of the housing 1 by these components.

  The suction port 10 is formed as an opening at the top of the housing 1. The air outlet 11 is formed in an opening at a lower portion of the housing 1 (more specifically, at a lower portion of a front portion of the housing 1). Further, the suction port 10 is provided with, for example, a vane or the like (not shown) as a mechanism for controlling the direction in which the air flows out. The blower 2 is installed downstream of the suction port 10 and upstream of the heat exchanger 9. A plurality of blowers 2 are arranged in parallel in the longitudinal direction of the housing 1 (perpendicular to the paper surface) according to the air volume required for the indoor unit 100 and the like.

  As shown in FIGS. 1 and 2, the blower 2 is an axial blower or a mixed flow blower in which a plurality of blades 50 are provided on an outer peripheral surface of a boss 5 serving as a rotation center of the fan 3. Specifically, the blower 2 includes a fan 3 and a cylindrical bell mouth 4 arranged with a gap on the outer peripheral side of the fan 3. That is, the fan 3 is housed inside the bell mouth 4.

  The fan 3 includes a boss 5 having a plurality of blades 50 provided on an outer peripheral surface, a motor 6 for driving to rotate, and a motor support 7 for supporting the motor 6. The boss 5 serves as a rotation center of the fan 3. As shown in FIG. 4, the blade 50 has a curved shape whose cross-sectional shape is curved along the rotation direction of the rotation axis P. The boss 5 and the blade 50 rotate around the rotation axis P by the driving force of the motor 6.

  The motor 6 is supported by a motor support 7 disposed downstream of the boss 5. The motor support 7 extends from the outer peripheral surface of the motor support 7 and is fixed to the bellmouth 4 by a plurality of arms 8 as motor supports connected to the inner peripheral surface of the bellmouth 4. As shown in FIG. 4, the arm portion 8 is a stationary blade having a cross-sectional shape having a curved shape opposite to the curved direction of the blade 50.

  The bell mouth 4 is for smoothly guiding the intake and exhaust to the fan 3. The bell mouth 4 has a substantially circular shape as shown in FIG. As shown in FIGS. 1 and 2, the bell mouth 4 has a substantially arc shape in which the upper end portion extends upward. A suction port is formed at the upper end of the bell mouth 4 (an arc portion on the suction side).

  The bell mouth 4 may be formed, for example, integrally with the housing 1 in order to reduce the number of components and improve the strength. Further, for example, the bell mouth 4, the blower 2, the motor 6, and the like may be modularized, and the housing 1 may be detachable from these components to improve maintainability.

  As shown in FIGS. 1 and 3, the heat exchanger 9 includes four heat exchangers 9 a to 9 d, and is located downstream of the blower 2 in the housing 1 and upstream of the outlet 11. It is provided in. As the heat exchanger 9, for example, a fin tube type heat exchanger may be used. Each of the heat exchangers 9 a to 9 is disposed so as to have an inclined surface inclined with respect to the rotation axis P of the blower 2. That is, the heat exchanger 9 is substantially W-shaped in the vertical section shown in FIG.

  In addition, the heat exchanger 9 shown in FIG. 4 is configured in a substantially W shape by four separately formed heat exchangers 9a to 9d, but is not limited to this configuration. For example, the four heat exchangers 9a to 9d constituting the heat exchanger 9 may be constituted by an integrated heat exchanger. Further, for example, each of the four heat exchangers 9a to 9d constituting the heat exchanger 9 may be constituted by a combination of a plurality of heat exchangers. Further, the shape of the heat exchanger 9 may be, for example, a V type, an N type, an M type, or the like.

  The indoor unit of the air conditioner has a configuration in which the fan 3 rotates around the rotation axis P by the driving force of the motor 6, and the air flows from the inlet 10 to the outlet 11. The airflow that has passed through the blower 2 exchanges heat with the refrigerant flowing inside the heat exchanger 9 arranged on the downstream side to become conditioned air, and is supplied to the area to be conditioned from the outlet 11. Here, in the indoor unit 100, as shown in FIG. 1, when the distance H between the blower 2 and the portion of the heat exchanger 9 arranged on the downstream side that is closest to the blower 2 is close, the wind speed is reduced. Since a fast region appears, a large-scale wind speed distribution may occur in the heat exchanger 9 and the pressure loss may increase.

  As shown in FIGS. 1 and 3, the distance between the blower 2 and the heat exchanger 9 arranged downstream of the blower 2 differs for each rotation angle range around the rotation axis of the fan 3. For example, as shown in FIG. 1 and FIG. 3, the heat exchanger 9 and the end of the bell mouth 4 are located at a length equal to or less than half the length L at which the distance in the rotation axis direction of the blower 2 becomes maximum. The range of the end on the downstream side of the bell mouth 4 is defined as a rotation angle range A. Further, as shown in FIGS. 1 and 3, the bell located at a position longer than half the length L at which the distance in the rotation axis direction of the blower 2 between the heat exchanger 9 and the end of the bell mouth 4 is maximum. The range of the downstream end of the mouse 4 is defined as a rotation angle range B.

  The airflow that has passed through the blower 2 has a large axial component in the rotation angle range A. Therefore, the airflow entering the heat exchanger 9 in the region of the rotation angle range A collides with the heat exchanger 9 with the wind speed being high immediately below the fan 3, and does not spread as expected but weakens. On the other hand, in the rotation angle range B in which the blower 2 and the heat exchanger 9 are sufficiently separated, the airflow flows into the heat exchanger 9 while diffusing, so that a uniform airflow can be obtained in a wide range. In particular, when the stationary blade 8 is provided downstream of the fan 3, a part of the circumferential velocity component of the airflow passing through the fan 3 is converted by the stationary blade 8 into an axial velocity component. Therefore, the wind speed distribution in the region of the rotation angle range A and the wind speed distribution in the region of the rotation angle range B are more remarkably different. As described above, in the indoor unit of the air conditioner, since a large wind speed distribution is generated in the heat exchanger 9, the pressure loss increases, and there is a possibility that the performance of the heat exchanger 9 may be reduced.

  Therefore, in the indoor unit 100 of the air conditioner according to Embodiment 1, as shown in FIGS. 1, 3, and 4, the rotational axis direction of the blower 2 at the heat exchanger 9 and the end of the bell mouth 4. Of the bell mouth 4, which is located at a length of not more than half of the length L at which the distance is maximum, more preferably not more than の of the length L at which the effect is enhanced, or not more than ８ of the length L. In a range A of the downstream end, a first bellmouth opening 40 is formed as a bellmouth opening through which wind flows in the radial direction.

  Further, in the indoor unit 100, the distance in the rotation axis direction of the blower 2 between the heat exchanger 9 and the end of the bell mouth 4 is half the length L at which the maximum, and more preferably the length L at which the effect is enhanced. In the range B of the downstream end of the bell mouth 4 at a position longer than one quarter of the length of the bell mouth 4 or a length longer than one eighth of the length L, the bell mouth is formed as a bell mouth opening through which air flows in the radial direction. An opening 41 for a two-bell mouth is formed. The opening area of the first bellmouth opening 40 is formed larger than the opening area of the second bellmouth opening 41.

  Note that, as shown in FIG. 3, a plurality of rotation angle ranges A and rotation angle ranges B may be alternately arranged depending on the shape of the heat exchanger 9. In that case, it is preferable to form the first bellmouth opening 40 in each rotation angle range A and to form the second bellmouth opening 41 in each rotation angle range B. However, the first bellmouth opening 40 is formed in the rotation angle range A selected from the plurality of rotation angle ranges A, and the second bellmouth opening 40 is formed in the rotation angle range B selected from the plurality of rotation angle ranges B. A configuration in which the portion 41 is formed may be used.

  The first bellmouth opening 40 and the second bellmouth opening 41 are formed between the adjacent stationary blades 8 as shown in FIG. This is because wind is guided to the first bell mouth opening 40 and the second bell mouth opening 41 by the stationary blade 8. Note that the first bellmouth opening 40 and the second bellmouth opening 41 may be formed between a selected one of the stationary blades 8 among the adjacent stationary blades 8.

  The first bellmouth opening 40 and the second bellmouth opening 41 have a shape in which the downstream end of the bellmouth 4 is cut off. This is because the wind can efficiently escape in the radial direction from the first bellmouth opening 40 and the second bellmouth opening 41. However, although not shown in detail, the opening 40 for the first bellmouth and the opening 41 for the second bellmouth are not limited to the cutouts shown in the figure, and the downstream edge of the bellmouth 4 is not limited thereto. The hole may be formed as a circular or square hole whose periphery is surrounded immediately above.

  In the indoor unit 100 of the air conditioner according to Embodiment 1, the first bellmouth opening 40 and the second bellmouth opening 41 for allowing wind to escape in the radial direction are formed. A radial airflow that blows outward through the mouth opening 40 for the mouse and the opening 41 for the second bell mouth can be generated.

  In particular, in the indoor unit 100 of the air conditioner according to Embodiment 1, the opening area of the first bellmouth opening 40 is formed larger than the opening area of the second bellmouth opening 41. In a range A in which the distance H between the blower 2 and the portion of the heat exchanger 9 arranged on the downstream side closest to the blower 2 is short, it is possible to distribute a large amount of airflow toward the outer periphery of the bell mouth 4. it can. Therefore, the indoor unit 100 can reduce a region where the wind speed is high in the heat exchanger 9 disposed on the downstream side of the blower 2, so that the uneven wind speed distribution generated in the heat exchanger 9 is uniformed. It is possible to suppress an increase in pressure loss and prevent a decrease in performance of the heat exchanger 9.

  In the indoor unit 100, the length L at which the distance between the heat exchanger 9 and the end of the bell mouth 4 in the direction of the rotation axis of the blower 2 becomes maximum is sufficiently long so that the pressure loss does not increase. is there. In this case, the configuration may be such that only the first bellmouth opening 40 is formed without forming the second bellmouth opening 41. That is, in the indoor unit 100, the first air flow in the radial direction falls within the range A where the distance H between the blower 2 and the portion of the heat exchanger 9 located downstream that is closest to the blower 2 is short. Since the bell mouth opening 40 is formed, a large amount of air can be distributed toward the outer periphery of the bell mouth 4.

Embodiment 2 FIG.
Next, an indoor unit of an air conditioner according to Embodiment 2 of the present invention will be described with reference to FIG. FIG. 5 is a main part enlarged cross-sectional view showing the inner peripheral surface side of a bellmouth constituting a blower of an indoor unit of an air conditioner according to Embodiment 2 of the present invention, which is developed in a plane. Note that the same components as those of the indoor unit of the air conditioner described in Embodiment 1 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  In the indoor unit of the air conditioner according to Embodiment 2, as shown in FIG. 5, the indoor units are the most upstream edges of the first bellmouth opening 40 and the second bellmouth opening 41 having different opening areas. The first bellmouth opening 40 and the second bellmouth opening such that the points a, b, and c are located downstream of a dotted line R connecting the lower ends of the blades 50 of the blower 2. 41 is formed. That is, the indoor unit is configured such that the lower end of the blade 50 of the blower 2 is not exposed to the outside through the first bellmouth opening 40 and the second bellmouth opening 41.

  In general, in the indoor unit of the air conditioner, when the lower end of the blade 50 of the blower 2 is exposed from the bell mouth 4, noise or separation occurs due to periodic pressure fluctuation in the rotation direction of the blower 2, Operation efficiency may be reduced. Therefore, in the indoor unit of the air conditioner according to Embodiment 2, the lower end of the blade 50 of the blower 2 is not exposed from the first bellmouth opening 40 and the second bellmouth opening 41 so that the lower end is not exposed. The opening 40 for the first bellmouth and the opening 41 for the second bellmouth are formed to make the uneven wind speed distribution of the heat exchanger 9 arranged downstream of the blower 2 uniform and to reduce the operating efficiency. Is suppressed.

Embodiment 3 FIG.
Next, an indoor unit of an air conditioner according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 6 is an enlarged cross-sectional view of a main part of an outer peripheral surface side of a motor supporting portion constituting a blower of an indoor unit of an air conditioner according to Embodiment 3 of the present invention, which is developed in a plane. The same components as those of the indoor unit of the air conditioner described in Embodiments 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted as appropriate.

  When the blower 2 is constituted by a general axial flow blower, the downstream side of the motor support 7 is a downstream region, which is a region where the wind speed is very small. Therefore, in the heat exchanger 9 located on the downstream side of the motor support 7, almost no wind flows, and a region where the wind speed flowing into the heat exchanger 9 is small is formed. Therefore, in the air conditioner and the indoor unit according to the sixth embodiment, the first motor support opening 70 and the second motor support opening through which wind flows radially at the downstream end of the motor support 7. The configuration is such that a portion 71 is formed.

  Specifically, as shown in FIG. 6, the first motor support opening 70 has a length at which the distance between the heat exchanger 9 and the end of the bell mouth 4 in the direction of the rotation axis of the blower 2 is maximized. At least one is formed in a range A ′ of the downstream end of the motor support 7 opposite to the range A of the downstream end of the bell mouth 4 located at a length L of half or less of the length.

  The second motor support opening 71 is located at a position longer than half the length L at which the distance between the heat exchanger 9 and the end of the bell mouth 4 in the direction of the rotation axis of the blower 2 is maximized. At least one is formed in a downstream end range B ′ of the motor support 7 opposite to the downstream end range B of the motor 4. The opening area of the first motor support opening 70 is formed larger than the opening area of the second motor support opening 71. This is because the range A 'where the first motor support opening 70 is formed is a region where the wind speed is faster than the range B' where the second motor support opening 71 is formed.

  As shown in FIG. 6, the first motor support opening 70 and the second motor support opening 71 are formed between adjacent vanes 8 so as not to interfere with the vanes 8. . Note that the first motor support opening 70 and the second motor support opening 71 may be formed between a selected one of the stationary blades 8 among the adjacent stationary blades 8.

  In the indoor unit of the air conditioner according to the third embodiment, since the first motor support opening 70 and the second motor support opening 71 are formed in the motor support 7, the boss 5 side of the blower 2 is provided. The air volume can also be distributed to the downstream side of the motor support 7 in the above, and the uneven wind speed distribution generated in the heat exchanger 9 can be made uniform.

  In addition, in the indoor unit 100, the length L at which the distance between the heat exchanger 9 and the end of the bell mouth 4 in the direction of the rotation axis of the blower 2 is maximum is sufficiently long so that pressure loss does not occur. is there. In this case, only the first motor support opening 70 may be formed without forming the second motor support opening 71.

Embodiment 4 FIG.
Next, an indoor unit of an air conditioner according to Embodiment 4 of the present invention will be described with reference to FIG. FIG. 7 is an enlarged cross-sectional view of a main part of an inner peripheral surface side of a bell mouth constituting a blower of an indoor unit of an air conditioner according to Embodiment 4 of the present invention, which is developed in a plane. In addition, about the same structure as the indoor unit of the air conditioner demonstrated in Embodiments 1-3, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  In the indoor unit of the air conditioner according to Embodiment 4, at least two or more bell mouth openings having different opening areas are formed, and the size of the bell mouth opening and the mounting of the stationary blade 8 are provided. This is a configuration that defines the relationship with the angle. The attachment angle of the stationary blade 8 is an angle formed by a straight line parallel to the rotation axis P of the blower 2 and a straight line connecting the leading edge and the trailing edge of the stationary blade 8. As shown in FIG. 7, the bell mouth 4 has a bell mouth opening 4A, a bell mouth opening 4B, and a bell mouth opening 4C having different opening areas. The size of the opening area is as follows: bellmouth opening 4B> bellmouth opening 4A> bellmouth opening 4C.

In general, the smaller the mounting angle of the stationary blade 8, the greater the pressure generated on the pressure surface on the outer peripheral side (bellmouth side). Therefore, in the indoor unit of the air conditioner according to Embodiment 4, the mounting angle of the stationary blade having the pressure surface adjacent to the bell mouth opening having a large opening area is changed to the pressure surface by the bell mouth opening having a small opening area. Is smaller than the mounting angle of the adjacent stationary blade. Specifically, the mounting angle θ ₁ of the stationary blade 8A whose pressure surface is adjacent to the bell mouth opening 4A, the mounting angle θ ₂ of the stationary blade 8B whose pressure surface is adjacent to the bell mouth opening 4B, When the pressure surface in the opening 4C is a mounting angle theta ₃ adjacent stationary blade 8C, the size of the attachment angle theta ₁ through? ₃ of the stationary blade 8A~8C becomes _{θ 3> θ 1> θ 2} .

  Therefore, in the indoor unit of the air conditioner according to Embodiment 4, the mounting angle of the stationary blade having the pressure surface adjacent to the bell mouth opening having a large opening area is set to the pressure surface to the bell mouth opening having a small opening area. Is configured to be smaller than the mounting angle of the adjacent stationary blade, and the pressure generated on the pressure surface on the outer peripheral side (bellmouth side) of the stationary blade 8 is increased. The heat can be efficiently diffused to the outer peripheral side of the mouse 4 and the uneven wind speed distribution generated in the heat exchanger 9 can be made uniform.

  The bell mouth opening having a different opening area described in the indoor unit of the air conditioner according to Embodiment 4 may have a configuration in which only a plurality of first bell mouth openings 40 are formed, or a first bell mouth. A configuration in which a plurality of mouse openings 40 and a plurality of second bell mouth openings 41 are formed may be employed.

Embodiment 5 FIG.
Next, an indoor unit of an air conditioner according to Embodiment 5 of the present invention will be described with reference to FIG. FIG. 8 is an enlarged cross-sectional view of a main part of an internal structure of a blower of an indoor unit of an air conditioner according to Embodiment 5 of the present invention in a plan view. In addition, about the same structure as the indoor unit of the air conditioner demonstrated in Embodiments 1-3, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

In the indoor unit of the air conditioner according to Embodiment 5, at least two or more bellmouth openings having different opening areas are formed, and the size of the opening area of the bellmouth opening is reduced. This is a configuration in which the relationship with the forward angle of the wing 8 is defined. A forward angle, as shown in FIG. 8, when viewed blowing device 2 in plan, the center P ₀ of the rotation axis P of the blower 2, the stationary blade 8D attached at one end to the motor support section 7 the straight line L ₁ that connects the center P ₁ of the mounting portion 80, the center P ₀ of the rotation axis P of the blower 2, a central P ₂ of the attachment portion 81 of the stationary blade 8E fitted with the other end to the bell mouth 4 Are the angles θ ₄ and θ ₅ formed by the straight line L ₂ connecting. In the case of the fifth embodiment, the stationary blade 8 having a pressure surface adjacent to the bellmouth opening having a large opening area is referred to as a stationary blade 8D, and the stationary blade 8 having a pressure surface adjacent to the bellmouth opening having a small opening area. Is a stationary blade 8E.

In general, the smaller the advance angle of the stationary blade 8, the smaller the inward velocity vector in the radial direction of the airflow on the outer peripheral side (bellmouth side) of the stationary blade 8. Therefore, in the indoor unit of the air conditioner according to Embodiment 5, the advance angle θ ₄ of the stationary blade 8D whose pressure surface is adjacent to the bell mouth opening having a large opening area is set to the bell mouth opening having a small opening area. the pressure surface is smaller than the forward angle theta ₅ adjacent stator vane 8E, and to reduce the velocity vector of the inward in the radial direction on the outer peripheral side of the stationary blade 8 (bell mouth side). Therefore, in the indoor unit of the air conditioner according to Embodiment 5, since the wind efficiently diffuses from the bell mouth opening to the outer peripheral side of bell mouth 4, the uneven wind speed distribution generated in heat exchanger 9 is uniform. Can be

  The bell mouth opening having a different opening area described in the indoor unit of the air conditioner according to Embodiment 5 may have a configuration in which only a plurality of first bell mouth openings 40 are formed, or a first bell mouth. A configuration in which a plurality of mouse openings 40 and a plurality of second bell mouth openings 41 are formed may be employed.

Embodiment 6 FIG.
Next, an indoor unit of an air conditioner according to Embodiment 6 will be described with reference to FIG. FIG. 9 is an enlarged cross-sectional view of a main part of an inner peripheral surface side of a bell mouth constituting a blower of an indoor unit of an air conditioner according to Embodiment 6 of the present invention, which is developed in a plane. In addition, about the same structure as the indoor unit of the air conditioner demonstrated in Embodiments 1-3, the same code | symbol is attached | subjected and the description is abbreviate | omitted suitably.

  In the indoor unit of an air conditioner according to Embodiment 6, at least two or more bell mouth openings having different opening areas are formed, and the size of the opening area of the bell mouth opening is larger than that of the bell mouth opening. This is a configuration that defines the relationship between the edge and the chord line of the stationary blade 8 connecting the trailing edge. As shown in FIG. 9, the bellmouth 4 has a bellmouth opening 4D, a bellmouth opening 4E, and a bellmouth opening 4F having different opening areas. The size of the opening area is as follows: bellmouth opening 4E> bellmouth opening 4D> bellmouth opening 4F.

  In general, it is known that, as the length of the chord line of the stationary blade 8 is longer, the generated pressure on the pressure surface on the outer peripheral side (bellmouth side) increases. Therefore, in the indoor unit of the air conditioner according to Embodiment 6, the pressure surface is adjacent to the bellows opening having a large opening area and the pressure surface is adjacent to the bellmouth opening having a small opening area. The chord line is longer than that of the stationary blade. That is, the length of the chord line of the stationary blade 8F whose pressure surface is adjacent to the bellmouth opening 4D is X, and the length of the chord line of the stationary blade 8G whose pressure surface is adjacent to the bellmouth opening 4E is X. Y, assuming that the length of the chord line of the stationary blade 8H whose pressure surface is adjacent to the bell mouth opening 4F is Z, the length of the chord line is Y> X> Z.

  Therefore, in the indoor unit of the air conditioner according to Embodiment 6, the stationary surface 8 having the pressure surface adjacent to the bell mouth opening having a large opening area is adjacent to the pressure surface adjacent to the bell mouth opening having a small opening area. As compared with the stationary vane, the chord line connecting the leading edge and the trailing edge is configured to be longer and the generated pressure on the pressure surface of the stationary blade 8 is increased, so that the wind passes through the opening for the bell mouth. As a result, the heat is diffused efficiently to the outer peripheral side of the bell mouth 4 and the uneven wind speed distribution generated in the heat exchanger 9 can be made uniform.

  Note that the bell mouth opening having a different opening area described in the indoor unit of the air conditioner according to Embodiment 6 may have a configuration in which only a plurality of first bell mouth openings 40 are formed, or a first bell mouth. A configuration in which a plurality of mouse openings 40 and a plurality of second bell mouth openings 41 are formed may be employed.

  Although the present invention has been described based on the embodiment, the present invention is not limited to the configuration of the above-described embodiment. In the present embodiment, the form in which the heat exchanger 9 is brought close to the downstream of the blower 2 is shown, but the present invention is not limited to this. On the downstream side of the blower 2, other than the heat exchanger 9, there are, for example, members for improving the strength of the electric board or the housing 1, and these members are asymmetric with respect to the circumferential direction of the blower 2. There are cases. In the indoor unit of the air conditioner according to the present embodiment, even if the member is asymmetrical with respect to the circumferential direction of the blower 2, the region where the wind speed is high can be reduced, and the increase in pressure loss can be suppressed. Can be. In short, it should be noted that various changes, applications, and uses made by those skilled in the art as necessary are also included in the gist (technical range) of the present invention.

REFERENCE SIGNS LIST 1 housing, 2 blower, 3 fan, 4 bellmouth, 4A-4F bellmouth opening, 5 boss, 6 motor, 7 motor support, 8 stationary blade (arm), 8A-8H stationary blade, 9 heat exchanger, 9a to 9d heat exchanger, 10 suction plug mouth, 11 outlet, 40 the first bell mouth opening, 41 second bell mouth opening, 50 blade, 70 a first motor supporting portion opening , 71 second motor support opening, 80, 81 mounting, 100 indoor unit.

Claims (10)

A housing having an inlet and an outlet,
Inside the housing, an axial flow or mixed flow blower installed on the downstream side of the suction port,
A heat exchanger provided on the downstream side of the air blower in the housing and upstream of the air outlet, for exchanging heat between air blown from the air blower and a refrigerant,
The blower has a bell mouth, one opening of which is arranged to face the heat exchanger, and a blade installed on the inner peripheral side of the bell mouth and rotating around a rotation axis. The air sucked from is sent toward the heat exchanger, and is blown out from the outlet,
The heat exchanger is arranged to have an inclined surface inclined with respect to a rotation axis of the blower,
In the range of the end on the downstream side of the bell mouth, the heat exchanger and the end of the bell mouth are located at a length equal to or less than half the length where the distance in the rotation axis direction of the blower at the end is the maximum. A first bellmouth opening is formed as a bellmouth opening for allowing wind to escape in the radial direction,
In the range of the downstream end of the bell mouth, the heat exchanger and the end of the bell mouth are located at a position longer than a half of the length at which the distance in the rotation axis direction of the blower is the maximum, An opening for the second bellmouth is formed as an opening for the bellmouth for passing wind in the radial direction,
An indoor unit of an air conditioner, wherein an opening area of the first bellmouth opening is larger than an opening area of the second bellmouth opening. The blower,
A motor that rotationally drives the blade,
A motor support for supporting the motor at the center of the bell mouth,
A plurality of arms extending from the outer peripheral surface of the motor support portion toward the inner peripheral surface of the bell mouth, and connected to the inner peripheral surface of the bell mouth,
The motor support is disposed closer to the heat exchanger than the blade,
The indoor unit of the air conditioner according to claim 1, wherein the opening for the bell mouth is formed between the adjacent arms. A housing having an inlet and an outlet,
Inside the housing, an axial flow or mixed flow blower installed on the downstream side of the suction port,
A heat exchanger provided on the downstream side of the air blower in the housing and upstream of the air outlet, for exchanging heat between air blown from the air blower and a refrigerant,
The blower,
A bellmouth arranged with one opening facing the heat exchanger,
A blade that is installed on the inner peripheral side of the bell mouth and rotates around a rotation axis,
A motor that rotationally drives the blade,
A motor support portion, which is formed of a cylindrical body and is disposed closer to the heat exchanger than the blades and supports the motor at the center of the bell mouth,
A plurality of arms extending from the outer peripheral surface of the motor support portion toward the inner peripheral surface of the bell mouth, and connected to the inner peripheral surface of the bell mouth; and It is configured to send toward the heat exchanger and blow out from the outlet,
The heat exchanger is arranged to have an inclined surface inclined with respect to a rotation axis of the blower,
In the range of the end on the downstream side of the bell mouth, the heat exchanger and the end of the bell mouth are located at a length equal to or less than half the length where the distance in the rotation axis direction of the blower at the end is the maximum. An opening for a bell mouth for allowing wind to escape in the radial direction is formed between the adjacent arms,
In the range of the downstream end of the bell mouth, the heat exchanger and the end of the bell mouth are located at a length equal to or less than half of the length at which the distance in the rotation axis direction of the blower is the maximum. An indoor unit for an air conditioner, wherein an opening for a first motor support portion for allowing wind to escape in a radial direction is formed in a range of a downstream end portion of the opposed motor support portion. The heat exchanger and the end of the bell mouth are located at a position longer than a half of the length at which the distance in the rotation axis direction of the blower is maximum, and face a range of the end on the downstream side of the bell mouth. In the range of the downstream end portion of the motor support portion, a second motor support portion opening for allowing air to escape in the radial direction is formed,
The indoor unit of an air conditioner according to claim 3, wherein an opening area of the first motor support opening is larger than an opening area of the second motor support opening. The blade has a curved shape whose cross-sectional shape is curved along a rotation direction of a rotation axis of the blower,
The indoor unit of the air conditioner according to any one of claims 2 to 4, wherein the arm portion is a stationary blade having a cross-sectional shape having a curved shape opposite to a curved direction of the blade. A housing having an inlet and an outlet,
Inside the housing, an axial flow or mixed flow blower installed on the downstream side of the suction port,
A heat exchanger provided on the downstream side of the air blower in the housing and upstream of the air outlet, for exchanging heat between air blown from the air blower and a refrigerant,
The blower,
A bellmouth arranged with one opening facing the heat exchanger,
A blade that is installed on the inner peripheral side of the bell mouth and rotates around a rotation axis,
A motor that rotationally drives the blade,
A motor support for supporting the motor at the center of the bell mouth,
A plurality of arms extending from the outer peripheral surface of the motor support portion toward the inner peripheral surface of the bell mouth, and connected to the inner peripheral surface of the bell mouth; and It is configured to send toward the heat exchanger and blow out from the outlet,
The heat exchanger is arranged to have an inclined surface inclined with respect to a rotation axis of the blower,
The blade has a curved shape whose cross-sectional shape is curved along a rotation direction of a rotation axis of the blower,
The arm portion is a stationary blade having a cross-sectional shape having a curved shape opposite to the curved direction of the blade,
In the range of the end on the downstream side of the bell mouth, the heat exchanger and the end of the bell mouth are located at a length equal to or less than half the length where the distance in the rotation axis direction of the blower at the end is the maximum. , as an opening for air escapes radially, different for behenate Rumausu opening portion of the opening area are formed at least two or more,
Assuming that an angle between a straight line parallel to the rotation axis of the blower and a straight line connecting the leading edge and the trailing edge of the stationary blade is an attachment angle of the stationary blade,
The mounting angle of the stationary blade having a pressure surface adjacent to the bell mouth opening having a large opening area is smaller than the mounting angle of the stationary blade having a pressure surface adjacent to the bell mouth opening having a small opening area. , Air conditioner indoor unit. A housing having an inlet and an outlet,
Inside the housing, an axial flow or mixed flow blower installed on the downstream side of the suction port,
A heat exchanger provided on the downstream side of the air blower in the housing and upstream of the air outlet, for exchanging heat between air blown from the air blower and a refrigerant,
The blower,
A bellmouth arranged with one opening facing the heat exchanger,
A blade that is installed on the inner peripheral side of the bell mouth and rotates around a rotation axis,
A motor that rotationally drives the blade,
A motor support for supporting the motor at the center of the bell mouth,
A plurality of arms extending from the outer peripheral surface of the motor support portion toward the inner peripheral surface of the bell mouth, and connected to the inner peripheral surface of the bell mouth; and It is configured to send toward the heat exchanger and blow out from the outlet,
The heat exchanger is arranged to have an inclined surface inclined with respect to a rotation axis of the blower,
The blade has a curved shape whose cross-sectional shape is curved along a rotation direction of a rotation axis of the blower,
The arm portion is a stationary blade having a cross-sectional shape having a curved shape opposite to the curved direction of the blade,
In the range of the end on the downstream side of the bell mouth, the heat exchanger and the end of the bell mouth are located at a length equal to or less than half the length where the distance in the rotation axis direction of the blower at the end is the maximum. , as an opening for air escapes radially, different for behenate Rumausu opening portion of the opening area are formed at least two or more,
When the blower is viewed in a plan view,
A straight line connecting the center of the rotation axis of the blower and the center of the mounting portion of the stationary blade having one end mounted to the motor support,
Assuming that an angle formed by a rotation axis of the blower and a straight line connecting the center of the attachment portion of the stationary blade to which the other end is attached to the bell mouth is an advance angle of the stationary blade,
The advancing angle of the stator vane whose pressure surface is adjacent to the bell mouth opening having a large opening area is smaller than the advancing angle of the vane whose pressure surface is adjacent to the bell mouth opening having a small opening area. , Air conditioner indoor unit. A housing having an inlet and an outlet,
Inside the housing, an axial flow or mixed flow blower installed on the downstream side of the suction port,
A heat exchanger provided on the downstream side of the air blower in the housing and upstream of the air outlet, for exchanging heat between air blown from the air blower and a refrigerant,
The blower,
A bellmouth arranged with one opening facing the heat exchanger,
A blade that is installed on the inner peripheral side of the bell mouth and rotates around a rotation axis,
A motor that rotationally drives the blade,
A motor support for supporting the motor at the center of the bell mouth,
A plurality of arms extending from the outer peripheral surface of the motor support portion toward the inner peripheral surface of the bell mouth, and connected to the inner peripheral surface of the bell mouth; and It is configured to send toward the heat exchanger and blow out from the outlet,
The heat exchanger is arranged to have an inclined surface inclined with respect to a rotation axis of the blower,
The blade has a curved shape whose cross-sectional shape is curved along a rotation direction of a rotation axis of the blower,
The arm portion is a stationary blade having a cross-sectional shape having a curved shape opposite to the curved direction of the blade,
In the range of the end on the downstream side of the bell mouth, the heat exchanger and the end of the bell mouth are located at a length equal to or less than half the length where the distance in the rotation axis direction of the blower at the end is the maximum. , as an opening for air escapes radially, different for behenate Rumausu opening portion of the opening area are formed at least two or more,
The stationary blade having a pressure surface adjacent to the bell mouth opening having a large opening area has a leading edge and a rear edge, as compared with the stationary blade having a pressure surface adjacent to the bell mouth opening having a small opening area. An indoor unit of an air conditioner that has long tied chord lines.   The indoor unit of the air conditioner according to any one of claims 1 to 8, wherein the edge located at the most upstream side of the bellmouth opening is located downstream of the lower end of the blade.   The indoor unit for an air conditioner according to any one of claims 1 to 9, wherein the bellmouth opening has a shape in which a downstream end of the bellmouth is cut off.

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