JP5447566B2 - Air conditioning indoor unit - Google Patents

Description

  The present invention relates to an air conditioning indoor unit, and more particularly to a wall-hanging type air conditioning indoor unit.

  There is a separate type of air conditioner composed of an outdoor unit installed outdoors and an indoor unit installed indoors. In particular, the indoor unit includes a wall-hanging type that is attached to an indoor wall surface or the like.

  As a wall-hanging type indoor unit, for example, one disclosed in Patent Document 1 (Japanese Patent Laid-Open No. 2001-311530) is known. The indoor unit according to Patent Document 1 has a top surface suction port on the top surface, and has a bottom surface suction port and an air outlet on the bottom surface. According to this indoor unit, the indoor air is sucked from both the suction ports and heat-exchanged by the heat exchanger, and then blown out into the room through the air outlet.

  By the way, the environmental conditions of the place where an indoor unit is installed differ for every place. Then, as in Patent Document 1, in an indoor unit having a suction port not only on the top surface but also on the bottom surface, depending on the environmental conditions of the place where the indoor unit is installed, the air is mainly on the top surface. It will be sucked in from the suction port, and on the other hand, the phenomenon that it is hardly sucked from the suction port on the lower surface may occur. In particular, wall-mounted indoor units are installed in a portion that is relatively close to the ceiling even indoors, and the gap between the top surface of the indoor unit and the ceiling is often narrow. As a result, the performance of the indoor unit varies as compared with the case where the performance evaluation is performed in a state where the gap between the ceiling and the ceiling of the indoor unit is large.

  Therefore, an object of the present invention is to suppress the occurrence of a phenomenon in which the suction port on the lower surface does not function depending on circumstances because environmental conditions are different.

An air conditioning indoor unit according to a first aspect of the present invention is a wall-hanging type air conditioning indoor unit, and includes a casing, a fan, a heat exchanger, and a suction resistance unit. The casing has a top surface suction port and a bottom surface suction port. The top surface suction port is provided from the front side to the rear side of the top surface. The lower surface suction port is provided on the lower surface. The fan is located inside the casing, and generates a flow of air sucked from the top surface suction port and the bottom surface suction port. The heat exchanger is formed by combining a front heat exchange part and a rear heat exchange part in a substantially inverted V shape in a side view inside the casing. The front heat exchange part covers the front of the fan, and the rear heat exchange part covers the rear side of the fan. The suction resistance unit obstructs the flow of air sucked from the top surface suction port. Furthermore, the suction resistance portion increases the suction resistance at the top surface suction port portion corresponding to the rear heat exchange portion rather than the suction resistance at the top surface suction port portion corresponding to the front side heat exchange portion. And a fan produces | generates the flow of the air which is inhaled from a top | upper surface suction inlet and a lower surface suction inlet, and flows in into a rear side heat exchange part. The suction resistance unit is located at the top surface suction port corresponding to the rear heat exchange unit. In particular, the suction resistance portion is constituted by a part of the casing.

  According to this air conditioning indoor unit, the amount of room air sucked from the top surface suction port is suppressed by the suction resistance portion. Therefore, even when an air-conditioning indoor unit is installed under an environmental condition that increases the indoor air sucked from the top surface suction port, the increase in the indoor air sucked from the top surface suction port To some extent. Therefore, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port can be reduced, and the bottom surface suction port does not function in some cases due to different environmental conditions. Occurrence of the phenomenon can be suppressed.

In particular, the suction resistance portion is constituted by a part of the casing. Thereby, a suction resistance part can be comprised easily and cost does not need to be compared with the case where a suction resistance part is formed with another member.

  The air conditioning indoor unit according to the second aspect of the present invention is the air conditioning indoor unit according to the first aspect, wherein the suction resistance portion is located at a rear portion of the top surface suction port corresponding to the rear heat exchange portion.

Thereby, the amount of indoor air sucked from the rear side portion of the top surface suction port is reduced. Therefore, the variation degree of the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port can be further reduced .

The air conditioning indoor unit according to the third aspect of the present invention is the air conditioning indoor unit according to the first or second aspect, wherein the suction resistance portion is provided over the entire length in the longitudinal direction of the top surface suction port.

  Thereby, the suction resistance part can block | cover the top | upper surface suction inlet over the full length of a longitudinal direction.

The air conditioning indoor unit according to the fourth aspect of the present invention is the air conditioning indoor unit according to any one of the first to third aspects, wherein the suction resistance portion covers about 30% or more of the rear side portion of the top surface suction port. It is out.

  Thereby, the variation degree of the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port can be reduced, and the lower surface suction port can be made to function reliably.

According to a fifth aspect of the present invention, in the air conditioning indoor unit according to the fourth aspect , the suction resistance portion blocks about 50% or more of the rear side portion of the top surface suction port.

  Thereby, the dispersion | variation degree of the ratio of the quantity of the indoor air suck | inhaled from a top | upper surface suction inlet and the quantity of the indoor air suck | inhaled from a lower surface suction inlet can be made smaller.

According to a sixth aspect of the present invention, in the air conditioning indoor unit according to any one of the first to fifth aspects, the wind speed of the air sucked from the lower surface suction port is about 0.5 m / sec or more.

  Here, the indoor air sucked from at least a part of the top surface suction port corresponding to the rear heat exchange section is sucked so that the wind speed of the air sucked from the lower surface suction port becomes about 0.5 m / sec or more. Resistor block. This reliably suppresses the degree of variation in the ratio between the amount of room air sucked from the top air inlet and the amount of room air sucked from the lower air inlet depending on the environmental conditions where the air conditioning indoor unit is installed. Can do.

According to the air conditioning indoor unit pertaining to the first aspect of the present invention, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port can be reduced, and the environmental conditions are different. Therefore, occurrence of a phenomenon that the lower surface suction port does not function can be suppressed depending on circumstances. Furthermore, according to this air conditioning indoor unit, the suction resistance portion can be configured easily, and the cost can be reduced as compared with the case where the suction resistance portion is formed of a separate member.

According to the air conditioning indoor unit pertaining to the second aspect of the present invention, the degree of variation in the ratio between the amount of room air sucked from the top surface inlet and the amount of room air sucked from the lower surface inlet can be made smaller .

According to the air conditioning indoor unit pertaining to the third aspect of the present invention, the suction resistance unit can block the top surface suction port over the entire length in the longitudinal direction.

According to the air conditioning indoor unit pertaining to the fourth aspect of the present invention, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port is reduced, and the lower surface suction port Can function reliably.

According to the air conditioning indoor unit pertaining to the fifth aspect of the present invention, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port can be further reduced. .

According to the air conditioning indoor unit pertaining to the sixth aspect of the present invention, depending on the environmental conditions in which the air conditioning indoor unit is installed, the amount of room air sucked from the top suction port and the amount of room air sucked from the bottom suction port The degree of variation in the ratio can be reliably suppressed.

The external view of the air-conditioning indoor unit which concerns on this embodiment. Sectional drawing at the time of cut | disconnecting the air-conditioning indoor unit which concerns on this embodiment by the II-II line of FIG. It is a general view inside a casing in case the supporting member which concerns on this embodiment is being fixed in the casing, Comprising: The figure at the time of removing a casing, a bottom frame, and an indoor fan from an air-conditioning indoor unit. Overview of the cleaning unit. The figure which expanded the cleaning unit vicinity in FIG. The figure at the time of removing a filter from a supporting member in FIG. FIG. 3 is an enlarged view of the vicinity of the top plate according to FIG. 2, and a view in which a support member and a filter are omitted from FIG. 2. The figure of the top surface vicinity of an air-conditioning indoor unit at the time of seeing the air-conditioning indoor unit which concerns on this embodiment from the top.

  Hereinafter, an air conditioning indoor unit according to the present invention will be described in detail with reference to the drawings. The following embodiments are specific examples of the present invention and do not limit the technical scope of the present invention.

(1) Configuration FIG. 1 is an external view of an air conditioning indoor unit 100 according to an embodiment of the present invention. The air conditioning indoor unit 100 is attached to an indoor wall surface or the like, and is connected to an outdoor unit (not shown) installed outside the room via a refrigerant pipe (not shown). The air conditioning indoor unit 100 can perform an automatic cleaning operation for automatically cleaning the filter 25 and the brush 33 (FIG. 2) in addition to the indoor cooling operation and the heating operation.

  As shown in FIGS. 1 to 5, the air conditioning indoor unit 100 mainly includes a casing 11, an indoor heat exchanger 13, an indoor fan 15, a bottom frame 17, a filter 25, a cleaning unit 30, and a support member. 40 and a suction resistance unit 50.

  In the following description, expressions indicating directions such as “up”, “down”, “left”, “right”, “front”, “rear”, etc. are used as appropriate. Each direction in the state installed in the wall surface etc. of a room in the state is represented.

(1-1) Casing As shown in FIG. 1, the casing 11 has a box-like shape elongated in the lateral direction (W direction in FIG. 1). Specifically, as shown in FIGS. 1 and 2, the casing 11 forms a three-dimensional space by the top plate 11 a, the front plate 11 b and the back plate 11 c, and the indoor heat exchanger 13, the indoor fan 15, The bottom frame 17, the cleaning unit 30, the support member 40, and the suction resistance part 50 are accommodated. The top plate 11 a mainly constitutes the top surface of the casing 11, and the front plate 11 b mainly constitutes the front surface of the casing 11. The front plate 11b has an upper end rotatably supported by a part of the top plate 11a and can operate in a hinged manner. The back plate 11 c mainly constitutes the back surface of the casing 11. The air conditioning indoor unit 100 is installed on the indoor wall surface by attaching the back plate 11c to a mounting plate (not shown) installed on the indoor wall surface with screws or the like.

  The top plate 11a of the casing 11 is provided with a top suction port 21 from the front side to the rear side of the surface 11a. From the top surface suction port 21, indoor air in the vicinity of the suction port 21 is taken into the casing 11 by driving the indoor fan 15, and the front heat exchange parts 13a and 13b (described later) of the indoor heat exchanger 13 and It is sent to each of the rear heat exchange units 13c (described later). In addition, the dotted arrow A of FIG. 2 represents the flow of the indoor air sent to the indoor fan 15 via the top | upper surface inlet 21 and the front side heat exchange part 13b as an example.

  The lower surface of the casing 11 is mainly constituted by a bottom portion 17a (described later) of the bottom frame 17, and a lower surface suction port 22 and an air outlet 23 are formed on the lower surface. The lower surface suction port 22 is provided on the wall side of the air outlet 23 and is connected to the inside of the casing 11 by the suction flow path 16. From the lower surface suction port 22, indoor air in the vicinity of the suction port 22 is taken into the casing 11 by driving the indoor fan 15, passes through the suction flow path 16, and the rear heat exchange part 13 c of the indoor heat exchanger 13. (To be described later). A dotted arrow B in FIG. 2 represents, as an example, a flow of indoor air sent from the lower surface suction port 22 to the rear heat exchange unit 13c. The outlet 23 is provided on the front side of the air conditioning indoor unit 100 with respect to the lower surface inlet 22, and is connected to the inside of the casing 11 by the outlet channel 18. From the blower outlet 23, the room air that has been sucked in from the suction openings 21 and 22 and heat-exchanged by the indoor heat exchanger 13 is blown out into the room through the blowout flow path 18. A dotted arrow C in FIG. 2 represents the flow of air sent from the blowout flow path 18 into the room through the blowout opening 23.

  The suction flow path 16 is formed from the lower surface suction port 22 along a flow path forming portion 17 b (described later) of the bottom frame 17. The blowout flow path 18 is formed along the flow path forming portion 17 b of the bottom frame 17 from the blowout opening 23. That is, it can be said that the suction flow channel 16 and the blow flow channel 18 are located adjacent to each other with the flow channel forming portion 17 b of the bottom frame 17 interposed therebetween.

  A horizontal flap 23 a is attached to the casing 11 so as to be rotatable in the vicinity of the air outlet 23. The horizontal flap 23 a can be driven by a flap motor (not shown), and opens and closes the air outlet 23 according to the operating state of the air conditioning indoor unit 100. Further, the horizontal flap 23a plays a role of changing the blowing direction of the room air so that the room air blown out from the blower outlet 23 is guided in the direction desired by the user.

(1-2) Indoor heat exchanger The indoor heat exchanger 13 includes a plurality of fins and a plurality of heat transfer tubes. The indoor heat exchanger 13 is attached to a part of the bottom frame 17 inside the casing 11. The indoor heat exchanger 13 functions as an evaporator or a condenser according to the operating state of the air conditioning indoor unit 100, thereby exchanging heat between the refrigerant and the air passing through the heat exchanger 13.

  In particular, as shown in FIG. 2, the indoor heat exchanger 13 according to the present embodiment has a substantially inverted V shape in which both ends are bent downward in a side view, and an indoor fan 15 is disposed below the indoor heat exchanger 13. positioned. In the present embodiment, for convenience of the following description, among the indoor heat exchanger 13 having such a shape, the heat exchange part that covers the front of the indoor fan 15 is referred to as “front heat exchange parts 13a and 13b”. The heat exchange part that covers the rear side of the fan 15 is referred to as a “rear heat exchange part 13c”. That is, the indoor heat exchanger 13 according to the present embodiment has a substantially inverted V shape in which the front heat exchange units 13a and 13b and the rear heat exchange unit 13c are connected at the apex 13d.

  In FIG. 2, as an example, the front heat exchange units 13 a and 13 b have a shape that is further bent in front of the indoor fan 15. That is, the front heat exchanging parts 13a and 13b are configured to be divided into a part (ie, the front heat exchanging part 13a) positioned below in the vertical direction and a part (ie, the front heat exchanging part 13b) located above. Yes. However, the front heat exchanging parts 13a and 13b only need to be positioned so as to cover the front of the indoor fan 15, and may not be configured to be vertically separated as shown in FIG.

(1-3) Indoor Fan The indoor fan 15 is located inside the casing 11 and is a cross-flow fan having a substantially cylindrical shape elongated in the W direction shown in FIG. The indoor fan 15 is driven to be sucked in from the top surface suction port 21 and the bottom surface suction port 22, respectively, and the indoor heat exchanger 13 (specifically, the front side heat exchange units 13 a and 13 b and the rear side heat exchange unit 13 c). ), And then flows through the heat exchanger 13 and is supplied into the room through the outlet 23 (see dotted arrows A, B, and C in FIG. 2).

  The drive shaft of the indoor fan 15 is connected to the output shaft of an indoor fan motor (not shown). When the indoor fan motor is driven, the output of the motor is transmitted to the drive shaft of the indoor fan 15 via the output shaft, so that the indoor fan 15 can be driven.

(1-4) Bottom frame The bottom frame 17 is comprised by the bottom part 17a and the flow-path formation part 17b.

  The bottom portion 17 a is an element that constitutes at least a part of the lower surface of the casing 11, and is exposed to the outside of the air conditioning indoor unit 100 in the bottom frame 17. Therefore, in the bottom view of the air conditioning indoor unit 100, the user can visually observe the bottom portion 17a.

  The flow path forming portion 17 b is an element located inside the casing 11 in the bottom frame 17. The flow path forming portion 17 b extends upward from one end of the bottom portion 17 a and has a shape curved along the shape of the indoor fan 15.

(1-5) Filter The filter 25 is mainly disposed between the top plate 11a of the casing 11 and the indoor heat exchanger 13, that is, on the upstream side in the indoor air flow direction with respect to the indoor heat exchanger 13. It is detachably mounted inside the casing 11. The filter 25 covers the front heat exchange units 13a and 13b and the rear heat exchange unit 13c. And the filter 25 has the shape where the rear side edge part 25b in the front-back direction of the filter 25 is located below the vertex 13d of the indoor heat exchanger 13. More specifically, the filter 25 according to the present embodiment has a substantially central portion extending along the top plate 11a of the casing 11, and further includes a front end 25a and a rear end 25b in the front-rear direction. It has a so-called substantially inverted U shape that covers the upper side of the indoor heat exchanger 13 by hanging downward from the apex 13 d of the indoor heat exchanger 13.

  In the present embodiment, the rear end portion 25b of the filter 25 reaches a position that substantially covers the rear heat exchange portion 13c, and the front end portion 25a of the filter 25 covers the entire front heat exchange portion 13b. However, it has reached a position that partially covers the upper portion of the front heat exchange section 13a. Thereby, the part of the filter 25 corresponding to the rear side heat exchange part 13c can remove dust from the indoor air mainly sucked from the lower surface suction port 22. The part of the filter 25 corresponding to the front heat exchange units 13 a and 13 b can remove dust from the indoor air mainly sucked from the top surface suction port 21. That is, it can be said that the filter 25 is for preventing the surface of the indoor heat exchanger 13 from being contaminated by dust in the indoor air.

  Such a filter 25 is, for example, a net woven or twilled with a resin thread, is formed in a ring shape (that is, an endless belt shape), and is stretched over a support frame (not shown). ing. As shown in FIG. 3, two filters 25 laid across the support frame are provided so as to be arranged on the right side and the left side in the front view of the air conditioning indoor unit 100. Since these filters 25 are not provided with reinforcing edges and ribs as found in general filters, the filters 25 cannot maintain a stable shape by themselves. For this reason, the filter 25 is stretched over the support frame to maintain an annular shape.

(1-6) Cleaning Unit As shown in FIG. 5, the cleaning unit 30 is located in the casing 11 in the vicinity of the filter 25, more specifically, in the vicinity of the folded portion at the bottom of the filter 25. The cleaning unit 30 not only cleans the filter 25 but also cleans a brush 33 (to be described later) that directly cleans the filter 25. As shown in FIGS. A part 32, a brush 33, a brush drive part 34, a brush cleaning part 35, a dust receiving part 37, and a compression roller 38.

  As shown in FIG. 4, the cleaning unit frame 31 has an elongated shape along the longitudinal direction of the air conditioning indoor unit 100 (W direction in FIG. 1), and a brush 33 is detachably mounted therein. It has been. As shown in FIG. 5, an opening 31 a is formed on the upper surface of the cleaning unit frame 31, and the cleaning unit frame 31 is located further below the folded portion at the lower part of the filter 25. Therefore, a part of the brush 33 is exposed to the space above the cleaning unit frame 31 through the opening 31a of the frame 31, and can directly contact the filter 25 through the opening 31a. Yes.

  The filter driving unit 32 circulates the filter 25 and includes a roller 32a, a roller motor (not shown), and the like. A so-called pile-woven fabric base fabric is affixed to the peripheral surface of the roller 32a. The fabric base fabric on the peripheral surface of the roller 32 a enters the mesh of the filter 25, and slippage hardly occurs between the roller 32 a and the filter 25. The output shaft of the roller motor is connected to the rotation shaft of the roller 32a. When the roller motor is driven, the roller 32a rotates and the filter 25 can go around.

  As shown in FIG. 4, the brush 33 has an elongated shape along the longitudinal direction of the air conditioning indoor unit 100 as in the cleaning unit frame 31, and a cross section perpendicular to the longitudinal direction has a substantially circular shape. doing. The brush 33 removes dust from the filter 25 by directly contacting the filter 25. As shown in FIG. 5, the brush 33 includes a core member 33 a and a plurality of wire members 33 b provided on the peripheral surface of the core member 33 a, and the wire member 33 b can contact the filter 25. It has a length. The brush 33 is provided so as to be rotatable with respect to the cleaning unit frame 31.

  The brush drive unit 34 is for rotating the brush 33, and is composed of, for example, a stepping motor. That is, the output shaft of the brush drive unit 34, which is a motor, is connected to the rotation shaft of the brush 33, and the brush 33 can be rotated by driving the stepping motor. For example, when the brush 33 rotates, the movement of the filter 25 stops, and conversely, when the filter 25 moves, the brush 33 stops rotating. That is, the filter driving unit 32 and the brush driving unit 34 can relatively move the filter 25 or the brush 33.

  As shown in FIG. 4, the brush cleaning unit 35 is attached to the cleaning unit frame 31. As shown in FIG. 5, the brush cleaning unit 35 is disposed along the rotation axis direction of the brush 33, protrudes from the back surface of the cleaning unit frame 31 toward the brush 33, and further rotates in the rotation direction of the brush 33. In other words, it is inclined to oppose (in the direction of the arrow in the brush 33 portion of FIG. 5). Thereby, the brush cleaning part 35 can scrape off the dust between the wire 33b of the brush 33, when the brush 33 rotates in the direction of the arrow of FIG.

  As shown in FIGS. 2 and 5, the dust receiving portion 37 is disposed below the brush 33 and the brush cleaning portion 35 while being attached to the cleaning unit frame 31. In the dust receiving part 37, the dust scraped off from the brush 33 by the brush cleaning part 35 is stored. Further, since the dust receiving part 37 is detachably attached to the cleaning unit frame 31, the user takes out the dust receiving part 37 from the cleaning unit frame 31 and the casing 11 and puts it in the dust receiving part 37. Accumulated dust can be easily treated.

  The compression roller 38 is a cylindrical bar-like member, and is rotatably supported by the cleaning unit frame 31. Here, the compression roller 38 is positioned in contact with the brush 33 in the vicinity of the brush cleaning unit 35 as shown in FIG. Thus, when the brush 33 rotates in the direction of the arrow in FIG. 5, the brush 33 follows the rotation of the brush 33 and rotates in the direction opposite to the rotation direction of the brush 33. Since the dust accumulated in the dust receiving portion 37 is compressed by the compression roller 38, a relatively large amount of dust enters the dust receiving portion 37. Further, due to the rotation of the compression roller 38, relatively high-viscosity dust is reliably sent to the dust receiver 37.

(1-7) Support Member As shown in FIG. 2, the support member 40 is located above the front heat exchange units 13a and 13b and the rear heat exchange unit 13c, and as shown in FIGS. The filter driving unit 32 and the brush driving unit 34, which are a part of 30, are supported. When the filter 25 is attached to the air conditioning indoor unit 100, the filter 25 is inserted from the front side of the casing 11 along the support member 40 into the inside. The filter 25 is supported while being guided to the back side of the casing 11. Further, the support member 40 is a lower end of the member 40 and a rear end 40b which is also a rear end in the front-rear direction. The rear end 40b is lower and lower than the apex 13d of the indoor heat exchanger 13. It has the shape located in.

  More specifically, the support member 40 has a substantially central portion extending along the top plate 11a of the casing 11, and the front end 40a and the rear end 40b in the front-rear direction are indoor heat exchanges. It has the shape which covers the upper direction of the indoor heat exchanger 13 by hanging below the vertex 13d of the vessel 13. That is, paying attention only to the front end 40a and the rear end 40b, the support member 40 has a so-called substantially inverted U-shape.

  As shown in FIGS. 3 and 6, the support member 40 has a left side portion 42 and a right side portion 43 that are positioned with a partition portion 41 extending in the front-rear direction at a substantially center in the left-right direction of the member 40. As shown in FIG. 3, the filter 25 spanned on the support frame is mounted on the upper surfaces of the portions 42 and 43. When the filter 25 is attached to the casing 11, first, in the state of FIG. 6, the filter 25 is inserted into the casing 11 from the front side of the casing 11, and the rear end 25 b of the filter 25 is the rear end of the support member 40. It slides along the upper surface of the left part 42 and the right part 43 of the support member 40 until it reaches the vicinity of 40b. Thus, the filter 25 is mounted on the upper surface of the support member 40 as shown in FIG. Therefore, as shown in FIG. 6, in the front view of the support member 40, the left and right end portions 42 a, 42 b, 43 a, and 43 b of the left portion 42 and the right portion 43 are end surfaces of the filter 25 that spans the support frame. And a sliding mechanism for sliding the filter 25 is provided. Specifically, the slide mechanism is formed of a groove, a plurality of protrusions, and the like. That is, it can be said that the slide mechanisms at the left and right end portions 42a, 42b, 43a, 43b of the left portion 42 and the right portion 43 are configured to move the filter 25 on the support member 40. This is a useful configuration not only when the filter 25 is mounted on the casing 11 but also when the filter 25 is moved when the filter 25 is cleaned.

(1-8) Suction resistance part The suction resistance part 50 is for inhibiting the flow of the air suck | inhaled from the top | upper surface suction inlet 21, Comprising: As shown to FIG. It is located in the vicinity of the top surface inlet 21 corresponding to the part 13c. Here, FIG. 7 is an enlarged view of the section near the top plate 11a in the casing 11 in FIG. 2, and the support member 40 and the filter 25 are omitted from FIG. FIG. 8 is a view of the vicinity of the top panel 11a when the air conditioning indoor unit 100 is viewed from above.

  More specifically, the suction resistance unit 50 according to the present embodiment is configured as a separate member from the top plate 11a, the front plate 11b, and the back plate 11c constituting the casing 11, and corresponds to the rear heat exchange unit 13c. It is attached to the rear portion 21a of the top surface suction port 21. That is, the suction resistance portion 50 can be said to be a separate member located behind and above the indoor fan 15 in the top surface suction port 21. Furthermore, in other words, the suction resistance portion 50 is located above the rear heat exchanger 13c and rearward of the apex 13d of the indoor heat exchanger 13 in the front-rear direction of the air conditioning indoor unit 100. It can be said that it is a separate member located on the back plate 11c side rather than being located near the center of the top surface suction port 21. Here, the rear portion 21 a of the top surface inlet 21 refers to a portion between the apex 13 d of the indoor heat exchanger 13 and the back plate 11 d of the casing 11. Therefore, as shown in FIG. 8, the rear heat exchange portion 13 c is located inside the casing 11 corresponding to the rear portion 21 a, and conversely, from the top 13 d of the indoor heat exchanger 13 to the front plate of the casing 11. The front heat exchange parts 13a and 13b are located inside the casing 11 corresponding to the front part 21b that is between 11b and 11b.

  In addition, the material of the suction resistance part 50 can be comprised with resin similarly to the material of the casing 11, for example. Or the suction resistance part 50 can also be comprised with a metal etc.

  And the suction resistance part 50 is provided over the full length of the top | upper surface suction inlet 21 in the left-right direction (namely, the W direction of FIG. 8), and as shown in FIG. In a top view of 100, it has a substantially rectangular shape elongated in the left-right direction.

  2, 7, and 8 according to the present embodiment, as an example, the suction resistance portion 50 is in contact with the back plate 11 c of the casing 11 without a gap, and the front side of the casing 11 (that is, the front of the casing 11). The case where it extends to the face plate 11b side) is shown. Further, FIG. 8 shows a case where the suction resistance portion 50 is in contact with both the left end portion 11d and the right end portion 11e of the casing 11 as an example.

  As described above, the suction resistance portion 50 blocks the rear portion 21a of the top surface suction port 21, so that the amount of room air sucked from the rear portion 21a of the top surface suction port 21 is reduced, and the top surface of the casing 11 is reduced. The indoor air sucked into the casing 11 from the inside mainly passes through the portion of the top surface inlet 21 that is not blocked (specifically, the front portion 21b and a portion of the rear portion 21a that is not blocked). It will be sucked. Therefore, even if the air conditioning indoor unit 100 according to the present embodiment is installed under an environmental condition in which the indoor air sucked from the top surface suction port 21 increases unless the suction resistance unit 50 is provided, The increase in room air sucked from the top surface suction port 21 is suppressed to some extent by the suction resistance unit 50.

  The “environmental condition” is a condition indicating what kind of environment the place where the air conditioning indoor unit 100 is installed. Examples of the environmental condition include a relatively narrow distance between the indoor ceiling at the place where the air conditioning indoor unit 100 is installed and the top surface of the indoor unit 100.

  Here, how much the suction resistance portion 50 blocks the rear portion 21a of the top surface suction port 21 will be described. The suction resistance unit 50 according to the present embodiment has an air velocity of about 0.5 m from the lower surface suction port 22 regardless of the actual environmental conditions in which the air conditioning indoor unit 100 is installed. The top suction port 21 is closed to such an extent that it keeps at least / sec. Specifically, when the area of the rear portion 21a of the top surface suction port 21 is 100%, the suction resistance portion 50 closes about 30% or more of the rear portion 21a. Furthermore, it is preferable that the suction resistance portion 50 covers about 50% or more of the rear portion 21a. 2, 7, and 8 which concern on this embodiment represent the case where the suction resistance part 50 has obstruct | occluded about 60% of the rear side parts 21a as an example.

  As a result, the ratio between the amount of room air sucked from the top surface suction port 21 and the amount of room air sucked from the bottom surface suction port 22 varies depending on the environmental conditions in which the air conditioning indoor unit 100 is installed. Can be reliably suppressed. Therefore, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port 21 and the amount of room air sucked from the bottom surface suction port 22 can be reduced, and the environmental conditions in which the air conditioning indoor unit 100 is installed are different. In some cases, the phenomenon that the lower surface suction port 22 does not function can be suppressed.

  In addition, about the concrete numerical value of how much the suction resistance part 50 block | closes the rear side part 21a of the top | upper surface suction inlet 21, the conditions which make the air volume of the indoor fan 15 the minimum air volume, about 30% of this rear side part 21a In addition to the above conditions, or the condition that about 50% or more is blocked, the condition that the air velocity of the air sucked from the lower surface inlet 22 is about 0.5 m / sec or more, and further considering the pressure loss, etc., desktop calculations, simulations, and experiments It is determined appropriately based on the above.

(1-9) Other Configurations In addition to the above, the air conditioning indoor unit 100 includes an indoor control unit (not shown) that controls various devices constituting the indoor unit 100. The indoor control unit is a microcomputer including a CPU and a memory, and is housed in a front portion of the casing 11. For example, the indoor control unit is connected to a flap motor and an indoor fan motor, and controls the opening and closing of the horizontal flap 23a, angle control, and air volume control of the indoor fan 15 by performing drive control of these motors. .

(2) Features (2-1)
The air conditioning indoor unit 100 according to the present embodiment is provided with a top surface suction port 21 and a bottom surface suction port 22, but the top surface suction port 21 corresponding to the rear heat exchange unit 13 c is configured with a suction resistance unit 50. It is blocked by. Thus, the amount of room air sucked from the top surface suction port 21 is suppressed by the suction resistance unit 50. Therefore, even if the air conditioning indoor unit 100 according to the present embodiment is installed under an environmental condition in which the indoor air sucked from the top surface suction port 21 increases unless the suction resistance unit 50 is provided, The increase in room air sucked from the top surface suction port 21 is suppressed to some extent by the suction resistance unit 50. Therefore, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port 21 and the amount of room air sucked from the bottom surface suction port 22 can be reduced. Occurrence of a phenomenon that does not function can be suppressed.

  Furthermore, since the degree of variation in the ratio between the amount of room air sucked from the top surface suction port 21 and the amount of room air sucked from the bottom surface suction port 22 is reduced, the amount of room air flowing into the indoor heat exchanger 13 is reduced. Also, variations due to environmental conditions are reduced. That is, the amount of indoor air flowing into the indoor heat exchanger 13 is not limited to what environmental conditions the air conditioning indoor unit 100 is installed in, and can be substantially constant. Therefore, it is possible to prevent the performance of the air conditioning indoor unit 100 from being different depending on the installation location.

(2-2)
In particular, the suction resistance part 50 is located in the rear part 21a of the top | upper surface suction inlet 21 corresponding to the rear side heat exchange part 13c. Thereby, the amount of room air sucked from the rear portion 21a of the top surface suction port 21 is reduced. Therefore, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port 21 and the amount of room air sucked from the bottom surface suction port 22 can be further reduced.

(2-3)
Moreover, the suction resistance part 50 is simply comprised by the member different from the casing 11, and the rear side part 21a of the top | upper surface inlet 21 of the casing 11 is obstruct | occluded reliably.

(2-4)
The suction resistance unit 50 is provided over the entire length of the top surface suction port 21 in the longitudinal direction. Thereby, the suction resistance part 50 can block | cover the top | upper surface suction inlet 21 over the full length of a longitudinal direction.

(2-5)
Further, the suction resistance portion 50 closes about 30% or more of the rear portion 21 a of the top surface suction port 21, so that the amount of room air sucked from the top surface suction port 21 and the room air sucked from the bottom surface suction port 22. It is possible to make the lower surface inlet 22 function reliably by reducing the degree of variation in the ratio to the amount of.

(2-6)
In particular, the suction resistance portion 50 closes about 50% or more of the rear portion 21 a of the top surface suction port 21, so that the amount of room air sucked from the top surface suction port 21 and the room air sucked from the bottom surface suction port 22. The degree of variation in the ratio to the amount of can be further reduced.

(2-7)
Further, in the present embodiment, the indoor air sucked from the rear portion 21a of the top surface suction port 21 is sucked so that the wind speed of the room air sucked from the lower surface suction port 22 becomes about 0.5 m / sec or more. Resistor 50 interferes. This ensures that the degree of variation in the ratio between the amount of room air sucked from the top surface suction port 21 and the amount of room air sucked from the bottom surface suction port 22 depends on the environmental conditions in which the air conditioning indoor unit 100 is installed. Can be suppressed.

(3) Modifications Although the embodiment of the present invention has been described with reference to the drawings, the specific configuration is not limited to the above-described embodiment, and can be changed without departing from the gist of the invention.

(3-1) Modification A
In the said embodiment, it demonstrated that the suction resistance part 50 was comprised by the member different from the casing 11. As shown in FIG. However, the suction resistance unit 50 may be configured by a part of the casing 11. In this case, the suction resistance unit 50 is configured by, for example, the top plate 11a of the casing 11 extending so as to make the top suction port 21 small.

  Thereby, the suction resistance part 50 can be comprised easily and cost does not need to be compared with the case where the suction resistance part 50 is formed with another member.

(3-2) Modification B
2, 7, and 8 of the said embodiment, the case where the suction resistance part 50 was contacting with the backplate 11c of the casing 11 without a clearance gap, and extended to the front side of the casing 11 was represented. However, the suction resistance unit 50 may block at least a part of the rear portion 21a of the top surface suction port 21 in a state separated from the back plate 11c.

  Moreover, in FIG. 8 of the said embodiment, the case where the suction resistance part 50 was in contact with both the left side edge part 11d and the right side edge part 11e of the casing 11 was represented. However, the suction resistance portion 50 may be separated from the left end portion 11d and / or the right end portion 11e of the casing 11 instead of being in contact therewith.

(3-3) Modification C
Moreover, the suction | inhalation resistance part which concerns on this invention is provided in order to obstruct the flow of the indoor air inhaled from the rear side part 21a of the top | upper surface inlet 21 as already stated. Therefore, the suction resistance portion may be provided so as to block at least a part of the rear portion 21a at a position away from the top plate 11a of the casing 11 downward.

  As described above, according to the present invention, the degree of variation in the ratio between the amount of room air sucked from the top surface suction port and the amount of room air sucked from the bottom surface suction port can be reduced, and the environmental conditions are different. Depending on the case, it is possible to suppress the occurrence of a phenomenon that the lower surface suction port does not function. Therefore, the air conditioning indoor unit according to the present invention is useful as a wall-hanging type indoor unit that is installed under various environmental conditions.

100 Air-conditioning indoor unit 11 Casing 11a Top plate 11b Front plate 11c Rear plate 13 Indoor heat exchangers 13a, 13b Front heat exchange unit 13c Rear heat exchange unit 15 Indoor fan 17 Bottom frame 21 Top surface inlet 21a Top surface inlet Rear portion 22a Front portion 22 of top surface suction port Lower surface suction port 23 Outlet 25 Filter 30 Cleaning unit 32 Filter drive unit 34 Brush drive unit 40 Support member 50 Suction resistance unit

JP 2001-311530 A

Claims (6)

A wall-hanging indoor unit,
A casing (11) having a top surface suction port (21) provided from the front side to the rear side of the top surface and a bottom surface suction port (22) provided on the bottom surface;
A fan (15) which is located inside the casing and generates a flow of air sucked from the top surface inlet and the lower surface inlet;
Inside the casing, a front heat exchange part (13a, 13b) that covers the front of the fan and a rear heat exchange part (13c) that covers the rear side of the fan are combined in a substantially inverted V shape in a side view. A heat exchanger (13) comprising:
It is for inhibiting the flow of the air sucked from the top surface suction port (21), and further, the rear side heat is higher than the suction resistance in the portion of the top surface suction port corresponding to the front side heat exchange unit. A suction resistance portion (50) for increasing the suction resistance in the portion of the top surface suction port corresponding to the exchange portion;
With
The fan generates a flow of air that is sucked from the top surface suction port and the bottom surface suction port and flows into the rear heat exchange part (13c),
The suction resistance portion (50) is located at the top surface suction port (21) corresponding to the rear heat exchange portion (13c) ,
The suction resistance portion (50) is constituted by a part of the casing (11).
Air conditioning indoor unit (100). The suction resistance portion (50) is located in a rear portion (21a) of the top surface suction port (21) corresponding to the rear heat exchange portion (13c).
The air conditioning indoor unit (100) according to claim 1. The suction resistance portion (50) is provided over the entire length in the longitudinal direction of the top surface suction port (21).
The air conditioning indoor unit (100) according to claim 1 or 2 . The suction resistance portion (50) closes about 30% or more of the rear portion (21a) of the top surface suction port (21).
The air conditioning indoor unit (100) according to any one of claims 1 to 3 . The suction resistance portion (50) closes about 50% or more of the rear portion (21a) of the top surface suction port (21).
The air conditioning indoor unit (100) according to claim 4 . The wind speed of the air sucked from the lower surface suction port (22) is about 0.5 m / sec or more.
The air conditioning indoor unit (100) according to any one of claims 1 to 5 .

Images