OUTDOOR UNIT FOR AIR-CONDITIONING APPARATUS
In an outdoor unit for an air-conditioning apparatus, an upper end of an upper anchoring portion of a fan guard is bent toward a casing and then formed upward, a lower end of a lower anchoring portion is bent toward the casing, a lower anchoring distal end portion that is a distal end-side portion of the lower anchoring portion is bent such that a distal end is oriented downward, a front panel includes an upper temporary fixing groove in which the upper anchoring portion is inserted and that restricts movement of the upper anchoring portion in a right and left direction and a lower temporary fixing hole in which the lower anchoring portion is inserted and that restricts movement of the lower anchoring portion in a forward direction and in a downward direction, and the upper temporary fixing groove and the upper anchoring portion are covered with a top panel.
The present invention relates to an outdoor unit for an air-conditioning apparatus and, more specifically, to a structure of attaching a fan guard.
BACKGROUND ARTHitherto, an outdoor unit for an air-conditioning apparatus, which includes a fan guard, is known. The fan guard covers an air outlet opening of an air duct for sending air. The fan guard prevents a user from touching a rotating fan through the air outlet opening. For example, Patent Literature 1 describes a configuration that, in an outdoor unit, a fan guard is caused to slide along both sides of grooves on a casing from above and fitted to the grooves. With this configuration, when a top panel is attached, the fan guard is fixed, and thus fixing of the fan guard with a screw is not required.
CITATION LIST Patent LiteraturePatent Literature 1: Japanese Unexamined Patent Application Publication No. 2000-039186
SUMMARY OF INVENTION Technical ProblemWith the configuration of Patent Literature 1, the fan guard cannot be attached or detached without raising the fan guard by a distance corresponding to the height of the fan guard, and space having a height corresponding to the height of the fan guard is required above the outdoor unit. For example, when an outdoor unit is suspended in a veranda of an apartment, there is a problem that no work space for attaching or detaching the fan guard is ensured.
In order to cause the fan guard to smoothly slide along the grooves of the casing, clearance needs to be provided on the front, rear, right, and left sides of each slide portion. However, clearance between the fan guard and the casing causes repeated vibrations of the fan guard due to flow of outlet air through the fan guard during operation, so there is a problem of noise generation.
The present invention has been made to solve the above-described problems, and it is an object of the present invention to provide a highly reliable outdoor unit for an air-conditioning apparatus, which does not require work space above and which simplifies work in attaching a fan guard, and which reduces noise during operation.
Solution to ProblemAn outdoor unit for an air-conditioning apparatus of an embodiment of the present invention includes a casing and a fan guard. The casing includes a front panel and a top panel. The front panel has an opening. The fan guard is made up of a combination of a plurality of vertical bars and a plurality of horizontal bars, and covers the opening. The fan guard includes an upper anchoring portion and a lower anchoring portion. The upper anchoring portion is provided at an upper end of one of the vertical bars, located at a center, or each of upper ends of at least two of the vertical bars, located apart from each other in a right and left direction of the casing. The lower anchoring portion is provided at a lower end of a plurality of the vertical bars, located apart from each other in the right and left direction of the casing. The upper anchoring portion is provided such that the upper end is bent toward the casing and further bent upward. The lower anchoring portion is provided such that the lower end is bent toward the casing. A distal end of a lower anchoring distal end portion that is a distal end-side portion of the lower anchoring portion is bent so as to be oriented downward. The front panel includes an upper temporary fixing groove and a lower temporary fixing hole. The upper anchoring portion is inserted in the upper temporary fixing groove. The upper temporary fixing groove restricts movement of the upper anchoring portion in the right and left direction. The lower anchoring portion is inserted in the lower temporary fixing hole. The lower temporary fixing hole restricts movement of the lower anchoring portion in a forward direction and in a downward direction. The upper temporary fixing groove and the upper anchoring portion are covered with the top panel.
Advantageous Effects of InventionAccording to the embodiment of the present invention, the fan guard is temporarily fixed when the lower anchoring portion of the fan guard is inserted in the lower temporary fixing hole of the front panel and the upper anchoring portion is inserted in the upper temporary fixing groove, and the fan guard is fixed to the casing when the top panel is placed on the fan guard. Therefore, it is not required to fix the fan guard with a screw or raise the fan guard, and thus working space is reduced, and workability for attaching or detaching the fan guard improves. In addition, since movement of the fan guard in the right and left direction is restricted by the lower temporary fixing hole and the upper temporary fixing groove and movement of the fan guard in the forward direction is restricted by the top panel, vibrations during operation are reduced, and also noise due to vibrations may be suppressed.
Hereinafter, an outdoor unit 100 for an air-conditioning apparatus according to Embodiment of the present invention will be described. The mode described in the drawings is an example, and is not restrictive. In the drawings, the same reference signs denote the same or corresponding components, and this applies to the entire text of the specification. In the drawings, the magnitude relations among components can be different from the actual ones.
<Overall Configuration of Outdoor Unit 100>
<Configuration of Front Panel 1>
<Configuration of Fan Guard 5>
The vertical bars 5b include first vertical bars 51b and second vertical bars 52b. The first vertical bars 51b are disposed at two portions located apart in the right and left direction of the casing 10. The second vertical bars 52b are disposed at two portions located apart in the right and left direction of the casing 10 and located closer to the center than the first vertical bars 51b.
Each of the first vertical bars 51b has an upper anchoring portion 51b2. The upper anchoring portion 51b2 is bent toward the casing 10 at its upper end, and then the distal end portion of the upper anchoring portion 51b2 is bent upward. In addition, each of the first vertical bars 51b has a lower anchoring portion 51b5 at its lower end. The lower anchoring portion 51b5 is bent toward the casing 10, and then a lower anchoring distal end portion 51b4 that is the distal end portion of the lower anchoring portion 51b5 is bent downward.
Each of the second vertical bars 52b has a contact portion 52b3 at its upper end and a contact portion 52b3 at its lower end. The contact portion 52b3 is bent toward the casing 10, and the distal end of the contact portion 52b3 is oriented at an angle close to a direction perpendicular to the surface 1h of the front panel 1.
Numbers of the horizontal bars 5a and vertical bars 5b are not limited to the specific numbers illustrated in the drawings. The locations of the first vertical bars 51b and the second vertical bars 52b are also not limited to the illustrated locations. The number of locations of the first vertical bars 51b is not limited to two, and may be one at the center or three or more in the right and left direction of the casing 10. The number of locations of the second vertical bars 52b is also not limited to two, and may be one at the center or may be three or more. However, it is desirable that the first vertical bars 51b and the second vertical bars 52b both be disposed equally in the right and left direction relative to the center of the fan guard 5. The fan guard 5 may be made up of resin, not metal wires.
As illustrated in
As indicated by the dashed line in
As illustrated in
The upper temporary fixing groove 1b is formed so as to have a depth equal to the diameter of the wire of the upper anchoring portion 51b2, and restricts movement, in the front and rear direction, of the upper anchoring portion 51b2 sandwiched by the side peripheral portion 3a of the top panel 3 and the surface 1h of the front panel 1. A portion of the upper anchoring portion 51b2, being exposed from the opening of the upper temporary fixing groove 1b, is pressed by the side peripheral portion 3a of the top panel 3, and movement of the upper anchoring portion 51b2 in the forward direction is restricted. Movement of the upper anchoring portion 51b2 in the rearward direction is restricted by the upper temporary fixing groove 1b having a shape recessed toward the backside. The depth of the upper temporary fixing groove 1b only needs to be a depth that allows the upper anchoring portion 51b2 to be sandwiched by the side peripheral portion 3a of the top panel 3 and the surface 1h of the front panel 1, and may be less than the diameter of the wire.
Since the upper anchoring portion 51b2 is press-fitted in the upper temporary fixing groove 1b, movement of the fan guard 5 in the right and left direction is restricted. Since the upper anchoring portion 51b2 is sandwiched by the front panel 1 and the top panel 3, movement of the fan guard 5 in the front and rear direction is restricted. Therefore, movement of the fan guard 5 due to vibrations during operation of the air-conditioning apparatus is prevented, and thus generation of noise is suppressed.
<Procedure to Attach Fan Guard 5>
The fan guard 5 is attached before the top panel 3 is attached to the casing 10.
First, in a position in which the upper anchoring portions 51b2 of the fan guard 5 are placed above and the lower anchoring portions 51b5 are placed below, the fan guard 5 is located in front of the front panel 1. At this time, the fan guard 5 is inclined by tilting the upper ends of the upper anchoring portions 51b2 forward of the casing 10. After that, the lower anchoring distal end portions 51b4 of the lower anchoring portions 51b5 are brought close to the lower portion of the front panel 1 and inserted into the lower temporary fixing holes 1c formed in the front panel 1, and the lower anchoring portions 51b5 are engaged with the lower temporary fixing holes 1c.
Subsequently, about the lower anchoring portions 51b5, the fan guard 5 is pivoted in a direction in which the upper ends of the upper anchoring portions 51b2 are brought closer to the upper portion of the front panel 1. Then, the upper anchoring portions 51b2 are moved to the locations of the upper temporary fixing grooves 1b formed in the front panel 1. At this time, the lower anchoring portions 51b5 contact with the lower edges 1p of the lower temporary fixing holes 1c, and movement of the lower anchoring portions 51b5 in the front and rear direction and in the downward direction is restricted. Therefore, the upper anchoring portions 51b2 move along predetermined trajectories and reliably reach the locations of the upper temporary fixing grooves 1b.
Subsequently, the upper anchoring portions 51b2 are pushed in toward the front panel 1 while being caused to contact with the lower edges 1p of the upper temporary fixing grooves 1b, and fitted into the upper temporary fixing grooves 1b. Thus, the upper anchoring portions 51b2 are engaged with the upper temporary fixing grooves 1b. It is desirable that the lower edges 1p of the upper temporary fixing grooves 1b have a curved surface 1f. This is because, when the lower edges 1p have the curved surfaces 1f, the upper anchoring portions 51b2 move along the curved surfaces 1f and easily engage with the upper temporary fixing grooves 1b.
The upper anchoring portions 51b2 and the lower anchoring portions 51b5 of the fan guard 5 are respectively engaged with the upper temporary fixing grooves 1b and the lower temporary fixing holes 1c, and the fan guard 5 is preliminarily fixed at a predetermined location of the casing 10. Thus, the fan guard 5 is temporarily fixed.
In a state where the fan guard 5 is temporarily fixed, the upper anchoring portions 51b2 are inserted in the upper temporary fixing grooves 1b, and movement of the fan guard 5 in the front and rear direction and in the right and left direction is restricted. In addition, the upper anchoring portions 51b2 of the fan guard 5 are press-fitted in the upper temporary fixing grooves 1b. Therefore, the fan guard 5 does not fall forward of the casing 10, and the fan guard 5 is kept attached to the casing 10. Hence, a worker does not need to hold the fan guard 5.
Finally, the top panel 3 is disposed on the casing 10 to which the fan guard 5 is temporarily fixed, and the four side peripheral portions 3a of the top panel 3 are fitted to the upper portion of the casing 10. Thus, the top panel 3 is placed to cover the casing 10. In this manner, the upper anchoring portions 51b2 of the fan guard 5 are sandwiched by the side peripheral portion 3a of the top panel 3 and the surface 1h of the front panel 1. Thus, the fan guard 5 is fixed to the casing 10. Attachment of the fan guard 5 completes.
Since the fan guard 5 is firmly fixed by the top panel 3, a forward drop-off of the fan guard 5 at the time when a large impact acts on the casing 10 is reduced. In addition, movement of the upper anchoring portions 51b2 and the lower anchoring portions 51b5 of the fan guard 5 in the front and rear direction and in the right and left direction is restricted, thus vibrations during operation are reduced, and noise due to vibrations is reduced. Furthermore, since the fan guard 5 is fixed by disposing the top panel 3 through clearance above the casing 10 and placing the top panel 3 to cover the casing 10, space required for attachment is reduced. In addition, fastening with a screw is not required, and therefore attachment is facilitated.
At the time of detaching the fan guard 5, the top panel 3 is detached, and the fan guard 5 is placed in a temporary fixed state. Then, the upper anchoring portions 51b2 are pulled out from the upper temporary fixing grooves 1b, the upper end of the fan guard 5 is pivoted in a direction to move forward, and then the fan guard 5 is raised upward to pull the lower anchoring portions 51b5 out from the lower temporary fixing holes 1c. Thus, detaching of the fan guard 5 completes.
In this case as well, no tool or other devices to release a screw are required. Even after the fan guard 5 is fixed, the fan guard 5 is kept in a temporarily fixed state unless the fan guard 5 is pulled out from the upper temporary fixing grooves 1b, and therefore a worker does not need to hold the fan guard 5. Therefore, in detaching of the fan guard 5 as well, improvement in workability is expected.
In the above description, the upper anchoring portion 51b2 and the lower anchoring portion 51b5 both are provided in the first vertical bar 51b. Instead, the upper anchoring portion 51b2 and the lower anchoring portion 51b5 may be respectively provided in different vertical bars. It is desirable that each of the set of upper anchoring portions 51b2 and the set of lower anchoring portions 51b5 be provided at bilaterally symmetric locations. This is because, with this configuration, forces that act on the fan guard 5 reach equilibrium. Furthermore, the upper anchoring portion 51b2 may be provided at least in one vertical bar located at the center.
<Modification>
As illustrated in
When the upper anchoring portion 51b2 is press-fitted into the upper temporary fixing groove 11b, the upper anchoring portion 51b2 is held by the protrusions 11b2, and movement in the right and left direction and in the forward direction is restricted. With the thus configured protrusions 11b2, the upper anchoring portion 51b2 is prevented from coming off from the upper temporary fixing groove 11b. In addition, for example, even when the outdoor unit 100 is manufactured without dimensional control for press-fitting, the upper anchoring portion 51b2 is held, and movement in the right and left direction and in the front and rear direction due to vibrations is restricted.
With the above-described outdoor unit 100 for an air-conditioning apparatus according to Embodiment, the upper anchoring portions 51b2 and lower anchoring portions 51b5 of the fan guard 5 are inserted into the upper temporary fixing grooves 1b and lower temporary fixing holes 1c of the front panel 1, and the fan guard 5 is temporarily fixed to the casing 10. Then, when the top panel 3 is placed on the casing 10 to which the fan guard 5 is temporarily fixed, the fan guard 5 is fixed. In a temporarily fixed state, movement of the upper anchoring portions 51b2 in the up and down direction is restricted by the upper temporary fixing grooves 1b, and movement of the lower anchoring portions 51b5 in the up and down direction and in the front and rear direction is restricted by the lower temporary fixing holes 1c. Therefore, a worker is not required to hold the fan guard 5. In addition, in a fixed state, movement of the upper anchoring portions 51b2 in the front and rear direction is restricted by the top panel 3 and the front panel 1. Therefore, vibrations during operation are reduced, so noise is reduced. In a temporarily fixed state or in a fixed state, since no fastening with a screw is required, attachment is facilitated, and workability of attaching and detaching of the fan guard 5 improves. Since the casing 10 is fixed when the top panel 3 is placed to cover the casing 10, work space to be ensured above the casing 10 may be small. Since the fan guard 5 is fixed in a temporarily fixed state, the fan guard 5 also does not need to be held at the time of detaching the fan guard 5.
The upper temporary fixing groove 1b is an opening that opens on the front of the casing, and allows the upper anchoring portion 51b2 to be inserted therein when the upper anchoring portion 51b2 is pushed in. Therefore, attachment is facilitated, and a member, such as a screw, that needs to be fixed is not required.
Since the upper temporary fixing groove 1b has a cylindrical shape, the upper anchoring portion 51b2 that has moved along the curved surface 1f can reach the upper temporary fixing groove 1b and engage with the upper temporary fixing groove 1b.
By allowing the width of the upper temporary fixing groove 1b to be equal to or less than the diameter of the upper anchoring portion 51b2, movement of the upper anchoring portion 51b2 press-fitted in the upper temporary fixing groove 1b, in the right and left direction can be restricted, and the upper anchoring portion 51b2 can be held.
With the protrusions 11b2 of the upper temporary fixing groove 11b, the upper anchoring portion 51b2 is prevented from coming off from the upper temporary fixing groove 11b. In addition, even when the outdoor unit 100 is manufactured without dimensional control for press-fitting, the upper anchoring portion 51b2 is held, and movement of the upper anchoring portion 51b2 in the right and left direction and in the front and rear direction due to vibrations is restricted.
Since the lower temporary fixing holes 1c open upward and the lower anchoring portions 51b5 are inserted in the lower temporary fixing holes 1c, the lower anchoring portions 51b5 contact with the lower temporary fixing holes 1c when the lower anchoring portions 51b5 move, and movement of the fan guard 5 in the front and rear direction and in the right and left direction is restricted.
With the lower edge 1p located at a further front side than the upper edge 1q of the lower temporary fixing hole 1c, the lower anchoring portion 51b5 contacts with the lower edge 1p when the lower anchoring portion 51b5 moves forward, and movement of the lower anchoring portion 51b5 in the forward direction is restricted.
The contact portions 52b3 and lower anchoring distal end portions 51b4 of the fan guard 5 contact with the casing 10, and apply opposite forces to the fan guard 5. Therefore, movement of the fan guard 5 in the forward direction is restricted by the contact portions 52b3, movement of the fan guard 5 in the rearward direction is restricted by the lower anchoring portions 51b5, and movement of the fan guard 5 due to vibrations is reduced.
REFERENCE SIGNS LIST1 front panel 1a opening 1b upper temporary fixing groove 1b3 inner wall surface 1c lower temporary fixing hole 1d, 1e edge portion 1f curved surface 1h surface 1n groove 1p lower edge 1q upper edge 2 side panel 3 top panel 3a side peripheral portion 4 fan 5 fan guard 5a horizontal bar 5b vertical bar 6 back panel 6a air inlet 7 fixing member motor 10 casing 11b upper temporary fixing groove 11b1 ridge 11b2 protrusion 15 heat exchanger 51b first vertical bar 51b2 upper anchoring portion 51b4 lower anchoring distal end portion 51b5 lower anchoring portion 52b second vertical bar 52b3 contact portion 100 outdoor unit
Claims
1. An outdoor unit for an air-conditioning apparatus, the outdoor unit comprising:
- a casing including a front panel and a top panel, the front panel having an opening; and
- a fan guard made up of a combination of a plurality of vertical bars and a plurality of horizontal bars, the fan guard covering the opening, wherein
- the fan guard includes an upper anchoring portion formed at an upper end of one of the vertical bars, located at a center in a right and left direction of the casing, or each of upper ends of at least two of the vertical bars, located apart from each other in a right and left direction of the casing, and a lower anchoring portion formed at a lower end of a plurality of the vertical bars, located apart from each other in the right and left direction of the casing,
- the upper anchoring portion is formed such that the upper end is bent toward the casing and further bent upward,
- the lower anchoring portion is formed such that the lower end is bent toward the casing,
- a distal end of a lower anchoring distal end portion that is a distal end-side portion of the lower anchoring portion is bent so as to be oriented downward,
- the front panel includes an upper temporary fixing groove in which the upper anchoring portion is inserted and that restricts movement of the upper anchoring portion in the right and left direction, and a lower temporary fixing hole in which the lower anchoring portion is inserted and that restricts movement of the lower anchoring portion in a forward direction and in a downward direction, and
- the upper temporary fixing groove and the upper anchoring portion are covered with the top panel.
2. The outdoor unit for an air-conditioning apparatus of claim 1, wherein
- the upper temporary fixing groove opens on the front of the casing.
3. The outdoor unit for an air-conditioning apparatus of claim 1, wherein
- the upper temporary fixing groove has a curved surface recessed in a cylindrical shape.
4. The outdoor unit for an air-conditioning apparatus of claim 1, wherein
- a width of the upper temporary fixing groove is equal to or less than a width of the upper anchoring portion.
5. The outdoor unit for an air-conditioning apparatus of claim 1, wherein
- the upper temporary fixing groove has a protrusion at a front of the upper temporary fixing groove.
6. The outdoor unit for an air-conditioning apparatus of claim 1, wherein
- the lower temporary fixing hole opens upward.
7. The outdoor unit for an air-conditioning apparatus of claim 1, wherein
- the lower temporary fixing hole is defined by a lower edge located at a lower side of the front panel and an upper edge located at an upper side of the front panel, and
- the lower edge is located at a further front side of the casing than the upper edge.
8. The outdoor unit for an air-conditioning apparatus of claim 1, further comprising:
- a contact portion provided at the lower end of the vertical bar in which the lower anchoring portion is not formed, the contact portion contacting with a surface of the front panel, wherein
- a force that acts on the fan guard by contact between the contact portion and the surface of the front panel is opposite to a force that acts on the fan guard by contact between the lower anchoring distal end portion and a portion of the casing forward of the lower temporary fixing hole.
Type: Application
Filed: Feb 23, 2017
Publication Date: Dec 5, 2019
Inventors: Hayato KURINO (Tokyo), Toshiyuki KUBONO (Tokyo)
Application Number: 16/466,664