JPS5824106Y2 - air conditioner - Google Patents

Description

[Detailed explanation of the idea] This proposal relates to an air conditioner having a plenum room.

Conventionally, as shown in Figs. 1 to 3, a plenum chamber 2 has an air outlet 1 formed in the front surface and an opening 3 formed in the bottom surface, and the outlet faces the opening 3, and the direction of air blowing is upward. In an air conditioner in which a sirocco type blower 4 is disposed below the plenum chamber 2 as shown in FIG. Since the longitudinal cross-sectional shape is rectangular, the air discharged from the opening 3 of the plenum chamber 2 is
When the air flows into the air, it rapidly expands and contracts, which causes a significant increase in flow resistance, resulting in a decrease in air flow characteristics, and also causes noise disturbances in the air flow.

In view of these problems, this proposal was made to improve the air volume characteristics and reduce the amount of noise generated.As shown in FIG. A ventilation guide plate 6 made of a sound absorbing and insulating material that expands from the rear to the front is connected from the opening 3 to the air outlet 1.
It has been set up over a period of time.

Therefore, since the air discharged from the opening 3 into the plenum chamber 2 flows along the air guide plate 6, it is not rapidly expanded or contracted as in the conventional case, so the flow resistance is reduced, and the turbulence is reduced. The amount of noise leaking from the plenum chamber 2 to the outside is reduced by reducing the amount of noise generated by the flow and improving the sound absorption effect by forming a double sound absorption wall of the heat insulating member 5 and the air guide plate 6 on the inner circumference of the plenum chamber 2. Reduced.

Incidentally, the shape of the air blow guide member 6 may be as shown in FIG. 5 or 6.

The one in Fig. 5 is an example in which the expanded shape is not linear but curved, and the one in Fig. 6 has a double wall part formed also behind the opening 3. This is possible because it is not displaced rearward as in the embodiment shown in FIG.

7 is a partition plate for attaching the blower 4.

The material of the ventilation guide plate 6 may be a porous material such as Tex board, rock wool, glass wool, or sponge-like plastic as shown in Figs. 4 to 6, or a plywood board, metal plate, etc. as shown in Fig. 7. It is a perforated plate with many small holes,
With the exception of some metal plates, the materials are generally expected to have not only sound-absorbing effects but also heat-insulating effects, and can be used to prevent dew formation in cooling air conditioners.

Furthermore, in order to achieve the object of the present invention to a higher degree, it is necessary to improve the aspect of the longitudinal section of the plenum chamber 2.

That is, the embodiments shown in FIGS. 8, 9, and 10 avoid sudden changes in the air flow discharged from the opening 3 to reduce flow resistance and prevent turbulence, and furthermore, a double wall is provided. The bottom wall 5a of the heat insulating member 5 and the air guide plate 6 are provided to improve the sound absorption effect.

In particular, in the embodiment shown in FIG. 10, the bottom wall and earthen wall of the plenum chamber 2 are provided at an angle, and the blower 4 is attached to the partition plate 7 so that the air blowing direction is inclined slightly backward. Due to the directional inclination and the inclination of the bottom wall 5a, sound is reflected many times within the plenum chamber 2, and the amount of noise leaking from the air outlet 1 can be reduced.

The embodiments shown in FIGS. 11 and 12 also have a structure in which the front part is easily trapped in the plenum chamber 2, similar to the embodiment shown in FIG. 10, so that the amount of noise leaking from the plenum chamber 2 can be reduced.

As mentioned above, the present invention has a plenum chamber with an air outlet formed in the front surface and an opening formed in the bottom surface, and a blower is installed below the plenum chamber so that the outlet faces the opening and the air blowing direction is upward. A sound-absorbing and heat-insulating member is installed around the periphery of the plenum chamber, and a ventilation guide plate made of a sound-absorbing material whose cross-sectional shape expands from the rear of the plenum chamber toward the front is used to direct air from the opening. Since it is provided over the air outlet, the rapid expansion and contraction of the air discharged from the opening is alleviated, and the reduction in flow resistance is closely related to the reduction in the amount of noise generated, thereby providing an air conditioner with less noise. can.

[Brief explanation of drawings]

Fig. 1 is a front view of the main parts of an air conditioner, Fig. 2 is a sectional view taken along the line II-II of Fig. 1 of the conventional example, and Fig. 3 is a sectional view taken along the line Ill-III of Fig. 1 of the conventional example. 4 to 7 are cross-sectional views taken along the line II-II in FIG.
12 are diagrams showing different examples of cross-sectional views taken along the line III--III in FIG. 1 of the same embodiment. 1...Air outlet, 2...Plenum room, 3...Opening, 4...Blower, 5...
...Sound absorbing and heat insulating member, 6...Blower guide plate.

Claims (1)

[Scope of utility model registration request] It has a plenum chamber with an air outlet formed in the front and an opening formed in the bottom, and a blower is arranged below the plenum chamber so that the outlet faces the opening and the direction of air blowing is upward. A sound-absorbing and heat-insulating member is attached to the periphery of the plenum chamber, and a ventilation guide image made of a sound-absorbing material whose cross-sectional shape expands from the rear of the plenum chamber toward the front is provided from the opening to the air outlet. An air conditioner characterized by: