JP6111947B2 - Air conditioner - Google Patents

Description

  The present invention relates to an air conditioner in which a fan guard is provided in an air passage.

  For example, as shown in Patent Document 1, a conventional air conditioner prevents an accident that occurs when a finger is inserted into a blower passage from an air inlet of an air conditioner to a blower outlet and contacts a blower fan. Some fan guards are provided for this purpose. The fan guard is configured in a grille shape in which a plurality of vertical bars and horizontal bars made of wire intersect each other so that a finger is not inserted.

  The air conditioner blower passage is provided with a vertical airflow direction plate at the air outlet, and a support column having a shaft support portion that pivotally supports the vertical airflow direction plate is provided by connecting the upper wall and the lower wall of the airflow path. It has been. The shaft support portion is formed so as to protrude from the center of the support column toward the vertical wind direction plate. The fan guard is provided with an opening formed by cutting a horizontal beam between adjacent vertical beams, and the opening is inserted into a shaft support portion of the column and attached to the front side of the column. Further, a part of the horizontal rail of the fan guard is locked by a hook provided at the base of the shaft support portion of the support column.

Japanese Patent No. 4698384

In the above-described conventional example, the opening of the fan guard is formed by cutting a horizontal beam between adjacent vertical beams, so that the interval between the column and the vertical beam at the end of the opening of the fan guard is narrow. A part of the crosspiece of the fan guard comes into contact by being locked by a hook provided at the base of the shaft support portion of the support column. The struts, the shaft support portions of the struts, and the opening of the fan guard are located in the air passage, and the space between the fan guard and the struts is narrow and partly in contact, so that air in that portion is difficult to flow. On the other hand, the fan guard is cooled by the cold air cooled by the indoor heat exchanger of the air conditioner. Since there is a temperature difference between the air between the columns and the fan guard, the fan guard is likely to be dewed. The dew on the fan guard is blown into the room, causing discomfort to the user of the air conditioner.
In order to prevent dew condensation, there is a way to widen the gap between adjacent vertical beams of the fan guard opening, but in that case there is no horizontal beam in the opening, which makes it easier to insert fingers and accidents. It is not suitable for the purpose of prevention.

  Therefore, the present invention provides a fan guard with a support provided in the air passage and a fan guard that is provided with an opening for inserting the support and is attached to the front of the support so as not to obstruct the flow of wind in the air passage. An object of the present invention is to provide an air conditioner that prevents the dew condensation.

In order to achieve the above object, the present invention comprises a casing that supports a blower fan and a blower fan to form a blower passage in a housing, and the leeward side of the blower passage serves as a blower outlet, and a vertical wind direction plate is provided at the blower outlet. In the air conditioner having a support column provided with a shaft support portion for supporting the vertical wind direction plate connected to the upper wall and the lower wall of the casing and having a fan guard between the support column and the vertical wind direction plate. The support part of the column protrudes downward from the extension line of the lower wall of the casing, and the fan guard covers the air outlet in the form of a grille made up of a plurality of vertical bars and a plurality of horizontal bars made of wire. The vertical beam located at the center is a U-shaped column beam having a connecting portion at the lower end with the column at the center, and the column beam is formed by opening the connecting portion to extend downward. Insert the connecting part into the support part of the column and connect the connecting part to the support part. Engaged on the back side.
Further, the inner dimension from the support pillar to one of the support pillars is set to 7 mm or more and 10 mm or less.

  In the air conditioner of the present invention, the fan guard and the column are supported by locking the connecting portion of the fan guard to the back side of the shaft support portion of the column that protrudes downward from the extension line of the lower wall of the casing forming the air passage. However, there is no contact in the air passage, and it is possible to prevent the fan guard attached to the support from being exposed. Moreover, it becomes possible to prevent dew of the fan guard attached to a support | pillar by making the internal dimension from a support | pillar to one support | pillar crossing 7 mm or more and 10 mm or less.

It is a front side perspective view of the indoor unit of the air conditioner in this invention. It is sectional drawing of the indoor unit of the air conditioner in this invention. It is the figure which showed the blower outlet of the indoor unit of the air conditioner in this invention. It is the figure which showed the fan guard of the air conditioner in this invention. It is the figure which showed the latching state of the support | pillar and fan guard of the air conditioner in this invention. It is a bottom view of the blower outlet of the air harmony machine in the present invention. It is the figure which showed the passage of the finger of the air conditioner in the present invention, and the dew result.

In an air conditioner according to the present invention, an outdoor unit (not shown) installed outdoors and an indoor unit 10 installed in an air-conditioned room are connected via a refrigerant pipe to constitute a refrigeration cycle. FIG. 1 is an external view of an indoor unit 10 attached to a wall surface near the ceiling of the air conditioning room, and FIG. 2 is a longitudinal sectional view of the indoor unit 10. The indoor unit 10 includes a casing 100 formed in a horizontally long rectangular shape, and the casing 100 is covered with a front panel 101 except for the back surface. Suction ports 102 are provided on the upper surface and the front surface of the front panel 101, an air outlet 103 is opened on the bottom surface on the front side, and an up / down air direction plate 131 that adjusts the air direction of the blown air up and down in the air outlet 103. And an up-and-down wind direction plate (hereinafter referred to as a diffuser) 132 that is pivotally supported by a column 141 described later. A human detection sensor 104 is provided on the right side of the air outlet 103, and a display unit 105 is provided on the human detection sensor 104.
A suction panel 106 is attached to the front surface of the front panel 101 so as to cover both the left and right ends of the front panel 101 and the upper end of the air outlet 103 to the front of the suction port 102.

  In FIG. 1, the surface with the suction panel 106 of the indoor unit 10 is the front surface, the front surface is the back surface, the surface with the air outlet 103 is the bottom surface, the bottom surface is the flat surface, and the human detection sensor 104 is provided. In the following description, the side surface on the right side is the right side, and the opposite side of the right side is the left side. The internal parts will be described in the same manner.

  As shown in FIG. 2, a cross flow fan type blower fan 109 arranged in parallel to the longitudinal direction of the case 100 and heat exchangers 110 a and 110 b surrounding the blower fan 109 are disposed inside the case 100. Prepare. Moreover, the casing 108 which forms from the ventilation fan 109 of the ventilation path 107 which connects the suction inlet 102 and the blower outlet 103 to the blower outlet 103 is provided. The blower fan 109 is pivotally supported by a fan motor (not shown) on the right side in the housing 100. The fan motor and the heat exchangers 110a and 110b are supported by the casing 108. The casing 108 includes a lower wall 116 that connects the rear-side rear guider 111 that guides air to the blower fan 109 and the lower end of the outlet 103, and a front-side stabilizer 113 that guides air to the blower fan 109 and the upper end of the outlet 103. A part of the air passage 107 is formed by the upper wall 114 to be connected. The upper wall 114 also serves as the drain pan 115a of the front heat exchanger 110a, and the wall extending from the rear guider 111 of the lower wall 116 to the back side becomes the drain pan 115b of the rear heat exchanger 110b. The upper wall 114 has a locking hole 117 for locking a locking claw portion 223 described later.

  A left and right wind direction plate 121 is provided in the air passage 107 between the air blowing fan 109 and the air outlet 103. As shown in FIGS. 2 and 3, the left and right wind direction plates 121 include a plurality of blades 122 arranged in parallel to the axial direction of the blower fan 109 and a drive shaft 123 that supports the front of the blades 122. The blade 122 is pivotally supported by the lower wall 116, and the front of the blade 122 is moved by the drive shaft 123 moving to the left and right to deflect the flow of air blown from the outlet 103 in the left-right direction. The drive shaft 123 is driven by a motor (not shown) on the right side of the air outlet 103.

  As shown in FIG. 2, the indoor unit 10 is configured to cool or warm air by exchanging heat of the indoor air taken from the suction port 102 with the refrigerant by the heat exchangers 110 a and 110 b when the blower fan 109 is rotated by a fan motor (not shown). Instead, the wind direction is adjusted by the left and right wind direction plates 121, the upper and lower wind direction plates 131 and the diffuser 132, and blown out from the air outlet 103 to the air conditioning chamber.

  Between the blades 122 of the left and right wind direction plates 121, a support column 141 that is formed integrally with the casing 108 and connects the upper wall 114 and the lower wall 116 is provided. The support post 141 is arranged in a direction perpendicular to the axial direction of the blower fan 109 and is provided in parallel at two places. The plate thickness of the column 141 is about 3 mm. The support column 141 includes a shaft support portion 141a that supports the diffuser 132 shown in FIG. 5, and the shaft support portion 141a protrudes below a virtual extension line 116a that extends the lower wall 116 of the casing 108 toward the blower outlet 103. . Therefore, the shaft support portion 141 a is located at a place away from the air blowing path 107.

  As shown in FIG. 2, a fan guard 200 that is located on the leeward side of the left and right wind direction plate 121 and covers the entire outlet 103 is provided in the casing 108. This is to prevent an accident that occurs when a finger or the like is inserted from the air outlet 103 and touches the blower fan 109. As shown in FIG. 4, the fan guard 200 is fixed by welding with a plurality of horizontal rails 210 (10 in the present invention) extending in the longitudinal direction of the air outlet 103 and orthogonal to the horizontal rails 210. A plurality of vertical bars 220 (12 in the present invention) extending in the short direction of the air outlet 103 are configured in a grill shape. The gap formed by the horizontal rail 210 and the vertical rail 220 is adjusted to a gap that does not allow human fingers to enter. The horizontal beam 210 uses a wire rod having a diameter of about 1.2 mm, and the vertical beam 220 uses a wire rod having a diameter of about 1.6 mm.

As shown in FIG. 3 and FIG. 4, the vertical rail 220 is bent along the shape of the blade 122 of the left and right wind direction plate 121. Further, the vertical beam 220 has the lower end aligned with the lowermost beam 210b. The vertical beam 220 has a first vertical beam 221 whose upper end is aligned with the uppermost beam 210a of the horizontal beam 210, and a locking claw portion 223 that extends upward from the uppermost beam 210a and bends in two steps on the front side. The second vertical bar 222 is formed. The second vertical bars 222 are arranged so as to jump substantially between the first vertical bars 221 at both ends.
The right ends of the horizontal rails 210 are bent toward the back, and the end portions are welded to the auxiliary rails 230. The auxiliary bar 230 has a central portion of the auxiliary bar 230 cut out, and the cut portion and the horizontal bar 210 form a gap portion 231 into which the drive shaft 123 is inserted.

  When the fan guard 200 is attached to the casing 108, the column 141 is centered on a portion adjacent to the column 141, and two vertical beams 241, 242 (hereinafter referred to as adjacent vertical beams) adjacent to both sides are at the lower end. It has a U-shaped support bar 240 having a connecting part 245 connected thereto. The support post 240 has an upper end aligned with the uppermost crosspiece 210a, and a connecting portion 245 protruding downward from the lowermost crosspiece 210b. Note that the lowermost horizontal beam 210b is cut between the adjacent vertical beams 241 and 242. An opening 244 is formed by the horizontal beam 210c, the adjacent vertical beams 241 and 242 and the connecting portion 245, which are one level higher than the lowermost horizontal beam 210b.

  Next, attachment of the fan guard 200 will be described. After the left and right wind direction plates 121 are attached to the casing 108, the fan guard 200 is attached. First, the opening 244 of the support post 240 is inserted into the shaft support 141 a of the support 141. Next, the connecting portion 245 is locked to the back side of the shaft support portion 141a. As shown in FIG. 5, there is a gap 141b between the casing 108 and the shaft support part 141a on the back side of the shaft support part 141a. The portion 245 is restrained by an arcuate bulge, and the connecting portion 245 is accommodated. Next, the upper end of the fan guard 200 is moved backward so that the drive shaft 123 of the left and right wind direction plate 121 is inserted into the gap 231 of the fan guard 200. Then, the locking claw portion 223 of the fan guard 200 is fitted into the locking hole 117 of the upper wall 114 of the casing 108 from below. Further, an S-shaped hook (not shown) is provided at the lower end of the second vertical beam 222 at the right end and the left end of the fan guard 200, and the S-shaped hook is screwed to the lower wall 116 to fix the fan guard 200. Is done.

Next, based on FIG. 6 and FIG. 7, an internal dimension (hereinafter referred to as an internal dimension L) from the support post 141 of the present invention to any one of the adjacent vertical bars 241 and 242 will be described.
The fan guard 200 needs to prevent a finger from passing through in order to prevent a finger or the like from coming into contact with the blower fan 109. Between the vertical bars other than the vicinity of the column 141, for example, between the first vertical bar 221 and the second vertical bar 222, the horizontal bar 210 is evenly arranged, so that there is no possibility of a finger entering and an interval of about 50 mm is provided. ing. However, since the opening portion 244 is cut off from the lowermost horizontal rail 210b and the connecting portion 245 protrudes downward, the opening portion 244 is wide in the vertical direction so that a finger does not enter the opening portion 244. The size of the inner dimension L from the column 141 to the adjacent vertical beam 241 or 242 is important.
FIG. 7A shows a table indicating whether or not the finger passes when the inner dimension L is changed to 12 mm, 10 mm, 7 mm, and 5 mm. As shown in FIG. 7A, when the inner dimension L is 12 mm, the gap between the support post 141 and the adjacent vertical bars 241 and 242 is wide, and there is a problem in safety because the finger passes. On the other hand, when the inner dimension L is 10 mm, 7 mm, and 5 mm, the gap between the support post 141 and the adjacent vertical bars 241 and 242 is narrow, so that the finger does not pass and safety can be ensured.

Next, FIG. 7B is a table showing whether or not dew is attached to the adjacent longitudinal bars 241 and 242 when the inner dimension L is set to 10 mm, 7 mm, and 5 mm and the air conditioner is performing cooling operation. . As shown in FIG. 7B, when the inner dimension L is 5 mm, dew is attached to the adjacent vertical bars 241 and 242, but when the inner dimension L is 7 mm, it is attached to the adjacent vertical bars 241 and 242. The dew becomes a very small amount, and when the inner dimension L is 10 mm, no dew is attached to the adjacent vertical bars 241 and 242. This is because the conditioned air cooled by the heat exchangers 110a and 110b easily flows into the gap as the inner dimension L increases, that is, as the gap between the support post 141 and the adjacent vertical bars 241 and 242 becomes wider. A temperature difference between the air flowing through the gap and the fan guard 200 is less likely to occur, and the fan guard is less likely to be dewed.
This is because that.

  From the above two tables, it can be seen that the inner dimension L that satisfies the condition that the finger does not pass and the fan guard 200 is difficult to be dewed is 7 mm or more and 10 mm or less.

  As described above, the air conditioner of the present invention locks the connecting portion 245 of the fan guard 200 on the back side of the support portion 141a of the support column 141 protruding downward from the extension line 116a of the casing 108 forming the air passage 107. As a result, the fan guard 200 and the support post 141 are not in contact with each other in the air passage 107, and the inner dimension from the support post 141 to one support post 250 is set to 7 mm or more and 10 mm or less. It is possible to prevent the finger from passing through the opening 244 and prevent the fan guard 200 adjacent to the support post 141 from being exposed.

DESCRIPTION OF SYMBOLS 10 Indoor unit 100 Housing | casing 101 Front panel 102 Inlet 103 Outlet 107 Air passage 108 Casing 121 Left and right wind direction plate 131 Up and down air direction plate 132 Diffuser 141 Prop 200 Fan guard 210 Horizontal beam 220 Vertical beam 240 Post beam 241 242 Crosspiece 244 opening 245 connection part

Claims (2)

The casing is provided with a casing that supports the blower fan and the blower fan to form a blower passage, the leeward side of the blower passage serves as a blower outlet, and the blower outlet includes a vertical airflow direction plate. In an air conditioner provided with a support provided with a shaft support part for supporting a plate by connecting the upper wall and the lower wall of the casing, and provided with a fan guard between the support and the vertical wind direction plate,
The support portion of the column protrudes below the extension line of the lower wall of the casing,
The fan guard covers the air outlet with a grille made up of a plurality of vertical bars and a plurality of horizontal bars made of wire, and the vertical bars located on the left and right of the column are connected at the lower end with the column as a center. A U-shaped support bar having a portion, and the support post forms an opening by extending the connecting portion downward, and the opening is inserted into a shaft support portion of the support to connect the connection An air conditioner characterized in that the portion is locked to the back side of the shaft support portion. 2. The air conditioner according to claim 1, wherein an inner dimension from the support column to one of the support beam is 7 mm or more and 10 mm or less.

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