JP2008190724A - Floor mounted air conditioner - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent leakage of sound from a blower through a suction hole, in a floor mounted air conditioner constructed so that the suction hole is formed in the front and the blower is disposed above the suction hole and on the downstream side of a heat exchanger. <P>SOLUTION: This floor mounted air conditioner 1 includes: a casing 2; a heat exchanger 3; the blower 4; a heat insulating material 9; and a sound absorbing material 10. The casing 2 is a substantially rectangular parallelepiped member including a front plate 21, a pair of side plates 22, 23, a back plate 24, a top plate 25 and a bottom plate 26, the interior of which is provided with an air passage S formed extending upward from the suction hole 21a. The heat exchanger 3 is disposed in the air passage S. The blower 4 is disposed above the suction hole 21a and on the downstream of the heat exchanger 3. The heat insulating material 9 is provided on the inner surface of a portion of a plurality of plates 21-29 constituting the casing 2, that is located on the downstream side of the heat exchanger 3. The sound absorbing material 10 is provided on a portion of the heat insulating material 9, that is disposed on the back plate 24. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a floor-mounted air conditioner, and more particularly to a floor-mounted air conditioner having a suction port on the front surface.

Conventionally, as shown in Patent Document 1, there is a floor-mounted air conditioner having a suction port in the front. Such a floor-standing air conditioner mainly includes a casing, a heat exchanger, and a blower. The casing has a front plate having a suction port, a pair of side plates, a back plate, a top plate, and a bottom plate, and has a substantially rectangular parallelepiped shape in which an air flow path upward is formed from the suction port. It is a member. The heat exchanger is disposed in the air flow path. The blower is disposed above the suction port and downstream of the heat exchanger.
Japanese Patent Laid-Open No. 11-304235

  In such a floor type air conditioner, there is a problem that condensation occurs on the surface of the casing when the temperature difference between the air cooled by passing through the heat exchanger and the air outside the casing becomes large. For this reason, a heat insulating material is affixed to the inner surface of the casing that forms the flow path on the downstream side of the heat exchanger in the air flow path, thereby suppressing the occurrence of condensation on the surface of the casing.

  Further, in such a floor-mounted air conditioner, sound from the blower leaks from the suction port, which causes noise.

  On the other hand, as described above, when the heat insulating material is attached to the inner surface of the casing, the heat insulating material can absorb the sound from the blower, so that the sound from the blower leaks from the suction port. Although some preventive effect can be obtained, the sound absorption effect is not sufficient.

  An object of the present invention is to provide a floor-type air conditioner in which a suction port is formed on the front surface and a blower is disposed above the suction port and downstream of the heat exchanger. There is to prevent.

  The floor-mounted air conditioning apparatus according to the first invention includes a casing, a heat exchanger, a blower, a heat insulating material, and a sound absorbing material. The casing has a front plate having a suction port, a pair of side plates, a back plate, a top plate, and a bottom plate, and has a substantially rectangular parallelepiped shape in which an air flow path upward is formed from the suction port. It is a member. The heat exchanger is disposed in the air flow path. The blower is disposed above the suction port and downstream of the heat exchanger. The heat insulating material is provided on the inner surface of a portion located on the downstream side of the heat exchanger among the plurality of plates constituting the casing. The sound absorbing material is provided on the surface of the portion of the heat insulating material provided on the back plate.

  The inventor of the present application, like this floor-mounted air conditioner, has a suction port formed in the front, and in a configuration in which the blower is arranged above the suction port and downstream of the heat exchanger, the blower leaks from the suction port. It was found that most of the sound from the sound was reflected from the back plate constituting the casing. Therefore, the inventor of the present application provided a sound absorbing material on the surface of the portion of the heat insulating material provided on the back plate in the floor-type air conditioner having such a configuration.

  As a result, in this floor-mounted air conditioner, it is possible to prevent the occurrence of condensation on the surface of the casing with the heat insulating material and to absorb the sound from the blower toward the back plate with the sound absorbing material. Sound can be prevented from leaking from the inlet. Moreover, when providing a sound absorbing material only on the surface of the part provided in the backplate among heat insulating materials, the effect of preventing the cost increase by a sound absorbing material as much as possible can also be acquired.

  The floor-mounted air conditioner according to the second aspect of the present invention is the floor-mounted air conditioner according to the first aspect of the present invention, wherein the sound absorbing material is provided below the blower.

  In this floor-mounted air conditioner, no sound absorbing material is provided on the upper part of the back plate where the sound of the blower is less likely to be reflected toward the suction port. The reflection of the sound from the lower part of the blower having a large influence on the leaking sound can be effectively prevented.

  A floor-mounted air conditioner according to a third invention is the floor-mounted air conditioner according to the first or second invention, wherein the heat insulating material is a material containing glass wool, and the sound absorbing material is a material containing resin fibers. is there.

  In this floor-type air conditioner, a resin fiber that has excellent heat insulation effect as a heat insulating material and uses an inexpensive material containing glass wool, and as a sound absorbing material, a resin fiber that has an effect of absorbing a wide range of sound compared to glass wool By using a material containing, it is possible to improve the sound absorption effect and reduce the thickness of the heat insulating material and the sound absorbing material.

  As described above, according to the present invention, the following effects can be obtained.

  In 1st invention, it can prevent reliably that the sound from an air blower leaks from an inlet.

  In 2nd invention, reflection of the sound from the lower part of a blower with a large influence with respect to the sound which leaks from an inlet port among backplates can be prevented effectively, preventing the cost increase by a sound-absorbing material.

  In the third aspect of the invention, it is possible to improve the sound absorption effect and reduce the thickness of the heat insulating material and the sound absorbing material.

  Hereinafter, an embodiment of a floor-standing air conditioner according to the present invention will be described based on the drawings.

(1) Configuration of Floor-mounted Air Conditioner FIG. 1 is a schematic front view of a floor-mounted air conditioner 1 according to an embodiment of the present invention. 2 is a schematic cross-sectional view taken along the line II of FIG. 1 (the inverter box 6 and the switch box 7 are shown not on the right side but on the right side). In this embodiment, the floor-type air conditioner 1 is connected to an outdoor unit (not shown) via a refrigerant communication pipe (not shown) to form a vapor compression refrigerant circuit, and at least an air-conditioned space It is possible to perform internal cooling.

  The floor-standing air conditioner 1 mainly includes a casing 2, a heat exchanger 3, and a blower 4.

  In the present embodiment, the casing 2 has a vertically long and substantially rectangular parallelepiped shape, and mainly includes a front plate 21, a pair of side plates 22, 23, a back plate 24, a top plate 25, and a bottom plate 26. Yes. The front plate 21 is a sheet metal member that mainly forms the front portion of the casing 2. A suction port 21 a that sucks air from the front of the casing 2 is formed in the middle portion of the front plate 21 in the vertical direction. A suction grill 27 (not shown in detail) is provided at the suction port 21a. The right side plate 22 is a sheet metal member mainly constituting the right side surface portion of the casing 2 (referring to the right side surface portion from the front of the casing 2). The left side plate 23 is a sheet metal member mainly constituting the left side surface portion of the casing 2 (referring to the left side surface portion from the front of the casing 2). The back plate 24 is a sheet metal member that mainly forms the back portion of the casing 2. In the present embodiment, the back plate 24 has an upper back plate 24a, an intermediate back plate 24b, and a lower back plate 24c. The middle back plate 24 b is a sheet metal member that forms the middle portion of the back surface of the casing 2 in the vertical direction. The upper back plate 24a is a sheet metal member that forms a portion from the upper end of the back surface of the casing 2 to the upper end of the middle back plate 24b. The lower back plate 24c is a sheet metal member that forms a portion from the lower end of the back surface of the casing 2 to the lower end of the middle back plate 24b. The top plate 25 is a sheet metal member that mainly forms the top surface portion of the casing 2. In the present embodiment, an air outlet 25a that blows out conditioned air is formed in a portion of the top plate 25 near the back plate 24. A duct 5 for sending conditioned air to the conditioned space is connected to the air outlet 25a. The bottom plate 26 is a sheet metal member that mainly forms the bottom surface portion of the casing 2. On the lower surface of the bottom plate 26, fixed legs 28 are provided for installation at the installation location. An air flow path S is formed in the casing 2 and extends upward from the suction port 21a. Further, an inverter box 6 as a first electrical component box is disposed inside the casing 2 so as to face the inner surface of the front plate 21. The inverter box 6 mainly accommodates an inverter control element (not shown) for controlling an operation frequency such as a blower drive motor 42 (described later). In the present embodiment, the inverter box 6 has a horizontally long and substantially rectangular parallelepiped shape, and is disposed above the suction port 21a with a gap between the inner surfaces of the pair of side plates 22 and 23. On the bottom plate 26, a switch box 7 as a second electrical component box is disposed. The switch box 7 mainly accommodates a terminal block (not shown) to which an electric wire drawn into the casing 2 from the outside of the casing 2 is connected and a control board (not shown) for controlling various devices. . The switch box 7 has a substantially rectangular parallelepiped shape in the present embodiment, and is located at a position slightly closer to the front plate 21 in the front-rear direction substantially in the center in the side view of the casing 2 and in the vicinity of the right side plate 22 in the front view of the casing 2. Is arranged.

  The heat exchanger 3 is a device for exchanging heat of air sucked into the casing 2 from the suction port 21a. In the present embodiment, the heat exchanger 3 is disposed in the air flow path S and is a plate constituting the casing 2. Of these, the primary side space S1 formed by the portion located on the upstream side of the heat exchanger 3 including the suction port 21a and the downstream side of the heat exchanger 3 including the outlet 25a among the plates constituting the casing 2 are positioned. It is divided into a secondary space S2 formed by the portion to be This heat exchanger 3 has a substantially panel-shaped form made up of a cross fin type fin-and-tube heat exchanger or the like, the front side portion thereof is located above, and the rear side The portion is inclined so as to be positioned below, and in this embodiment, extends from the back surface of the inverter box 6 toward the back plate 24 (more specifically, the lower back plate 24c). A drain pan 8 for receiving condensed water falling from the heat exchanger 3 is provided below the lower end of the heat exchanger 3.

  The blower 4 is a device that sucks air into the casing 2 from the suction port 21a and blows out air that has undergone heat exchange in the heat exchanger 3 from the blower port 25a. In the present embodiment, the blower 4 is disposed in the secondary space. Has been. More specifically, the blower 4 is disposed above the suction port 21 a and downstream of the heat exchanger 3. In the present embodiment, the blower 4 is a double-suction type sirocco fan that is a type of centrifugal fan, and mainly includes an impeller 41, a blower drive motor 42 that rotationally drives the impeller 41, and the impeller 41. The scroll casing 43 is provided. A rotating shaft 42 a of the blower drive motor 42 is connected to the impeller 41. Further, the scroll casing 43 is formed with two scroll inlets 43a for sucking air from the secondary side space S2 and a scroll outlet 43b for sending air to the outlet 25a.

  When the floor-mounted air conditioner 1 having such a configuration is operated, the blower 4 is driven, whereby air is sucked into the casing 2 from the suction port 21a, and the primary side space S1 of the air flow path S, The heat exchanger 3, the secondary space S2, and the blower 4 (specifically, the impeller 41 and the scroll casing 42) are passed through in this order, and are air-conditioned through the duct 5 from the outlet 25a to the outside of the casing 2 (in this embodiment). Blown into space). When this operation is a cooling operation, the air is cooled when passing through the heat exchanger 3, so that condensed water is generated on the surface of the heat exchanger 3. The condensed water falls from the heat exchanger 3 and is received by the drain pan 8. Further, the air that has passed through the heat exchanger 3 and has flowed into the secondary space S <b> 2 has a large temperature difference from the air outside the casing 2, so that condensation tends to occur on the surface of the casing 2.

  Therefore, in the floor-mounted air conditioner 1 of the present embodiment, the portion located on the downstream side of the heat exchanger among the plurality of plates 21 to 26 constituting the casing 2 (that is, the portion forming the secondary space S2). The heat insulating material 9 is provided on the inner surface of the casing 2 so as to suppress the occurrence of condensation on the surface of the casing 2. For example, as shown in FIGS. 2 to 7, a heat insulating material 9 a, a heat insulating material 9 b, and a heat insulating material 9 c are provided on the inner surfaces of the upper back plate 24 a, the middle back plate 24 b, and the lower back plate 24 c, respectively. Here, the heat insulating material 9a and the heat insulating material 9b are provided on almost the entire upper back plate 24a and the middle back plate 24b because the entire upper back plate 24a and the entire middle back plate 24b form the secondary space S2. However, since only the upper part of the lower back plate 24c (that is, the upper part of the lower end portion of the heat exchanger 3) of the heat insulating material 9c forms the secondary space S2, It is provided only in the upper part (that is, the upper part of the lower end part of the heat exchanger 3). In FIG. 2, only the heat insulating materials 9 a, 9 b, 9 c provided on the inner surface of the back plate 24 are illustrated, but the secondary side space S <b> 2 of the front plate 21, the side plates 22, 23, and the top plate 25. As in the case of the back plate 24, the heat insulating material 9 is also provided in the portion forming the. And as this heat insulating material 9, the raw material containing glass wool is used. In the present embodiment, although not shown in detail, the glass wool surface coated with glass fiber fabric is used, and it is difficult to cause a problem that the powdered glass wool is scattered due to aged deterioration or the like. Yes. Moreover, in this embodiment, the heat insulating material 9 is affixed on the inner surface of the casing 2 with an adhesive tape or the like, but also in this case, glass wool not covered with glass fiber is affixed to the inner surface of the casing 2. Compared to the above, problems such as peeling off are less likely to occur. In addition, although the thing of another material can also be used as the heat insulating material 9, it is desirable to use the glass wool which was cheap and excellent in heat insulation performance.

  In the form in which the suction port 21a is formed on the front surface and the blower 4 is disposed above the suction port 21a and downstream of the heat exchanger 3 as in the floor-type air conditioner 1, the blower in operation Since the sound from 4 leaks from the inlet 21a, it causes noise. The main cause of the sound leaking from the suction port 21a is the sound from the blower 4 that reflects the inner surface of the casing 2 and reaches the suction port 21a. In particular, the sound that reflects the back plate 24 that constitutes the casing 2 (for example, The influence of the arrow A in FIG. Moreover, as in this embodiment, when the duct 5 is connected to the air outlet 25a, the sound leaking from the air outlet 25a to the outside of the casing 2 is small, and the sound leaking from the air inlet 21a is conspicuous. .

  Therefore, in the floor-type air conditioner 1 of the present embodiment, the sound absorbing material 10 is provided on the surface of the heat insulating material 9 provided on the back plate 24 (in this embodiment, the heat insulating materials 9b and 9c). The sound from the blower 4 toward the back plate 24 is absorbed by the sound absorbing material 10, and the phenomenon that the sound from the blower 4 that is the main cause of the sound leaking from the suction port 21a is reflected on the back plate 24 is suppressed. As a result, the sound from the blower 4 is prevented from leaking from the suction port 21a. Moreover, in this embodiment, the sound absorbing material 10 is provided below the blower 4. More specifically, as shown in FIGS. 2 to 7, the sound absorbing material 10 b is provided on the surface of the heat insulating material 9 b provided on the middle back plate 24 b and the surface of the heat insulating material 9 c provided on the lower back plate 24 c. And the sound absorbing material 10c are provided, and no sound absorbing material is provided on the surface of the heat insulating material 9a provided on the upper back plate 24a. Here, the middle back plate 24b and the lower back plate 24c are a portion of the back plate 24 below the blower 4 and above the height position of the suction port 21a and a portion at the same height position as the suction port 21a. In view of the phenomenon in which the sound from the blower 4 reflects the back plate 24, the heat-insulating material 9b and the heat-insulating material are included because the reflected sound includes a portion that is likely to be directed to the suction port 21a. A sound absorbing material 10b and a sound absorbing material 10c are provided on the surface of the material 9c. On the other hand, the upper back plate 24 a constitutes a portion of the back plate 24 that is at the same height as the blower 4, and reflected from the viewpoint of the phenomenon that the sound from the blower 4 reflects the back plate 24. Since the sound is difficult to go to the suction port 21a, no sound absorbing material is provided on the surface of the heat insulating material 9a. Thus, in this embodiment, since the sound absorbing material is not provided on the upper portion of the back plate 24 where the sound of the blower 4 is difficult to be reflected toward the suction port 21a, the cost of the sound absorbing material 10 is prevented and the back is reduced. The reflection of the sound from the lower part of the blower 4 which has a large influence on the sound leaking from the suction port 21a in the face plate 24 can be effectively prevented. Further, although the sound absorbing material 10 may be provided in a portion other than the back plate 24, from the viewpoint of the phenomenon that the sound from the blower 4 reflects the back plate 24, the sound absorbing material 10 is provided in a portion other than the back plate 24. The effect of reducing the sound leaking from 21a is very small compared to the case where the sound absorbing material 10 is provided on the back plate 24, and is not desirable from the viewpoint of cost increase. In the case where the sound absorbing material 10 is provided only on the surface of the portion of the heat insulating material 9 provided on the back plate 24, it can be said that it also has the effect of preventing the cost increase by the sound absorbing material 10 as much as possible. And as this sound-absorbing material 10 (in this embodiment, the sound-absorbing materials 10b and 10c), the raw material containing resin fibers, such as polyester, is used. In the present embodiment, the sound absorbing material 10 is attached to the inner surface of the heat insulating material 9 (the heat insulating materials 9b and 9c in the present embodiment) with an adhesive tape or the like. Although other materials can be used as the sound absorbing material 10, resin fibers such as polyester, which absorbs a wide range of sound compared to glass wool, etc. (especially absorbs sound in the low range). Is better than glass wool) from the viewpoint of reducing the thickness of the sound absorbing material 10 and reducing the cost. In addition, when resin fibers such as polyester are used as the sound absorbing material 10, a relatively high heat insulating effect can be obtained, which contributes to the thinning of the heat insulating material 9. Thus, in this embodiment, the heat insulating material 9 is excellent in the heat insulating effect and uses an inexpensive material containing glass wool, and the sound absorbing material 10 is excellent in the effect of absorbing sound in a wide sound range compared to glass wool. By using a raw material containing resin fibers, it is possible to improve the sound absorption effect and reduce the thickness of the heat insulating material and the sound absorbing material.

(2) Features of the floor-mounted air conditioner of the present embodiment The floor-mounted air conditioner 1 of the present embodiment has the following features.

(A)
In the floor-mounted air conditioner 1 of the present embodiment, the heat insulating material 9 prevents the occurrence of condensation on the surface of the casing 2, and the sound absorbing material 10 can absorb the sound from the blower 4 toward the back plate 24. Therefore, it is possible to prevent the sound from the blower 4 from leaking from the suction port 21a. Further, when the sound absorbing material 10 is provided only on the surface of the portion of the heat insulating material 9 provided on the back plate 24, the effect of preventing the cost increase by the sound absorbing material 10 as much as possible can also be obtained.

(B)
In the floor-mounted air conditioner 1 according to the present embodiment, the sound absorbing material 10 is not provided on the upper portion of the back plate 24 where the sound of the blower 4 is difficult to reflect toward the suction port 21a, and thus the cost increase due to the sound absorbing material 10 is prevented. On the other hand, it is possible to effectively prevent reflection of sound from the lower part of the blower 4 that has a great influence on the sound leaking from the suction port 21a in the back plate 24.

(C)
In the floor-type air conditioner 1 of the present embodiment, the heat insulating material 9 is made of a material including glass wool that is excellent in heat insulating effect and inexpensive, and the sound absorbing material 10 absorbs sound in a wider sound range than glass wool. By using a material including a resin fiber having an excellent effect, it is possible to improve the sound absorption effect and reduce the thickness of the heat insulating material 9 and the sound absorbing material 10.

(3) Other Embodiments Although the embodiments of the present invention have been described with reference to the drawings, the specific configuration is not limited to these embodiments and can be changed without departing from the scope of the invention. It is.

  For example, the present invention can be applied to any floor-type air conditioner having a configuration in which a suction port is formed in the front and a blower is disposed above the suction port and downstream of the heat exchanger.

  If the present invention is used, in the floor-type air conditioner in which a suction port is formed in the front and the blower is disposed above the suction port and downstream of the heat exchanger, sound from the blower leaks from the suction port. Will be able to prevent.

1 is a schematic front view of a floor-mounted air conditioner according to an embodiment of the present invention. FIG. 2 is a schematic cross-sectional view taken along the line II of FIG. 1 (the inverter box and the switch box are shown not on the right side but on the right side). It is the figure which looked at the upper back board from the front side of the casing. It is the figure which looked at the middle back plate from the front side of the casing. It is the figure which looked at the lower back board from the front side of the casing. It is an enlarged view of the II section of FIG. It is an enlarged view of the III part and IV part of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floor type air conditioner 2 Casing 3 Heat exchanger 4 Blower 9, 9a, 9b, 9c Heat insulating material 10, 10b, 10c Sound absorbing material 21 Front plate 21a Suction port 22, 23 Side plate 24 Back plate 25 Top plate 26 Bottom plate S Air Flow path

Claims (3)

It has a front plate (21) having a suction port (21a), a pair of side plates (22, 23), a back plate (24), a top plate (25), and a bottom plate (26). A substantially rectangular parallelepiped casing (2) in which an air flow path (S) directed upward from the suction port is formed;
A heat exchanger (3) disposed in the air flow path;
A blower (4) disposed above the inlet and downstream of the heat exchanger;
A heat insulating material (9) provided on the inner surface of a portion located on the downstream side of the heat exchanger among the plurality of plates constituting the casing;
A sound absorbing material (10) provided on a surface of a portion of the heat insulating material provided on the back plate;
A floor-standing air conditioner (1) comprising:   The floor-mounted air conditioner (1) according to claim 1, wherein the sound absorbing material (10) is provided below the blower (4). The heat insulating material (9) is a material containing glass wool,
The sound absorbing material (10) is a material containing resin fibers.
The floor-mounted air conditioner (1) according to claim 1 or 2.

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