JPH0123045Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a ceiling-embedded air conditioner.

(Prior art) Conventionally, this type of ceiling-embedded air conditioner is described in, for example, Japanese Utility Model Application Publication No. 103624/1983, and
As shown in the figure, at least one pair of heat exchangers 2, 2 facing each other is disposed in the inner upper part of the casing 1, and a fan chamber 3 is formed in the inner lower part of the casing 1. A Sirotskov fan a is disposed in the chamber 3, and a suction port 12 that opens into the air-conditioned room is formed in the lower part of the casing 1 corresponding to the fan chamber 3. A blowout passage 11 is formed that opens into the air conditioning room and blows out conditioned air in multiple directions.

In this way, by rotationally driving the fan a, the air in the air-conditioned room is sucked in from the suction port 12 and sent to each of the heat exchangers 2, 2, and as it passes through each of the heat exchangers 2, 2, heat is exchanged. Then, the blowout passage 11
Conditioned air is blown out into the air-conditioned room.

(Problems to be Solved by the Invention) In the ceiling-embedded air conditioner as described above, a suction port 12 is provided at a lower position of the fan chamber 3 in the casing 1. Since the fan room 3 is open to the air-conditioned room through the fan room 3, the driving sound of the fan a installed in the fan room 3 is directly transmitted to the air-conditioned room, making the noise in the air-conditioning room loud and causing discomfort. There was the problem of inviting people. Furthermore, in the past, since the Sirotskov fan a was adopted and the Sirotskov fan a was installed inside the fan chamber 3, it was necessary to secure a large space for the fan chamber 3, especially the space in the vertical direction, and the casing 1 There is a problem in that the size of the air conditioner becomes larger and the overall structure of the air conditioner becomes larger.In order to solve this problem, it is conceivable to use a fan that does not have a fan housing, such as a mixed flow fan, but in this case, Another problem arises as follows.

That is, when air conditioning is performed by an air conditioner, the pressure component of the air sucked in from the suction port 12 and blown out from the blowout passage 11 by the rotational drive of the fan a has a static pressure higher than the dynamic pressure. This is more desirable, and by doing so, the fan performance of the fan a can be improved. However, in the case of the conventional air conditioner that employs the Sirotskov fan a, the rotation of the fan rotor improves the performance of the fan a. Since the given dynamic pressure is converted to static pressure within the fan housing, fan performance can be easily obtained, but when using a fan that does not have a fan housing, such as the mixed flow fan mentioned above, the dynamic pressure is converted to static pressure. Unless a converting part is formed separately, sufficient fan performance cannot be ensured and the fan cannot be put to practical use.For this reason, adding the converting part increases the number of parts and complicates the device structure. be.

The purpose of the present invention is to reduce the influence of fan operation noise by using a shielding plate, reduce the size of the entire device, and improve fan performance with a simple structure.

(Means for Solving the Problems) In order to solve the above problems, the present invention provides a casing 1 with at least one pair of heat exchangers 2 facing each other, and an intermediate between these heat exchangers 2. A fan 4 equipped with a motor 5 and a fan rotor 3 fixed to a drive shaft 6 of the motor 5 is disposed at the location so that the drive shaft 6 is in the vertical direction,
A guide wall 8b is provided outside the heat exchangers 2, 2, a suction passage 10 is provided inside the guide wall 8b, and a blowout passage 11 is provided outside the guide wall 8b.
A suction grill 13 is provided inside the lower part of b, and a drain receiver 14 is provided above the suction grill 13 and below the fan chamber 3 in which the fan 4 is disposed, and below the heat exchangers 2, 2. , 14 and closes the lower part of the fan chamber 3.
and at the upper part of the heat exchangers 2, 2,
A fan guide 8 continuous to the guide wall 8b is provided on the blowing side of the fan 4, and a differential user portion 9 is formed between the fan guide 8 and the top plate 1a of the casing 1. The outlet side of the user section 9 is communicated with the blowout passage 11.

(Function) During operation of the air conditioner, as the fan 4 installed in the fan chamber 3 is rotated, the air sucked from the air-conditioned room and heat exchanged with the heat exchanger 2 is transferred to the fan guide. Air is blown from the fan outlet side to the air-conditioned room along the line 8 through the differential user section 9, and when passing through the differential user section 9, the cross-sectional area of the differential user section 9 in the blowing direction is gradually expanded, As the flow velocity decreases and the swirling component decreases, the dynamic pressure of the blown air is effectively converted into static pressure to improve the fan performance of the fan 4, and the shield plate 15 provided at the lower part of the fan chamber 3 Thus, the noise generated due to the rotation of the fan 15 is blocked.

(Embodiments) The ceiling-embedded air conditioner according to the present invention will be described below with reference to embodiments of the drawings.

In FIGS. 1 and 2, 1 is a rectangular casing with an open bottom;
Inside, there are a pair of heat exchangers 2 facing each other,
Two sets of heat exchangers 2 are provided, and a fan chamber 3 is formed in the inner part surrounded by each heat exchanger 2, and a mixed flow fan 4 is disposed in the fan chamber 3.

The mixed flow fan 4 includes a motor 5 and a motor 5.
and a fan rotor blade 7 fixed to a drive shaft 6 of the casing 1.
The drive shaft 6 is vertically suspended, and the fan rotor 7 is supported at the tip of the drive shaft 6.

Further, in the casing 1, a top plate 1a of the casing 1 is provided on the top of each of the heat exchangers 2, 2.
A fan guide 8 extending parallel to the top plate 1a is provided at a predetermined interval between the fan guides 8 and the top plate 1a, and a differential user portion 9 is formed between the fan guide 8 and the top plate 1a. fan guide 8
A guide wall 8a facing into the fan chamber 3 and guiding air blown from the fan chamber 3 to the differential user part 9 is integrally formed at the inner end of the fan guide 8, Guide walls 8b extending downward at predetermined intervals are integrally formed between the heat exchanger 2 and each side wall 1b of the casing 1, and between the guide walls 8b and the heat exchanger 2, The suction passage 10 is formed, and the guide wall 8b
A blowout passage 11 is provided between the casing side wall 1b and the casing side wall 1b.
The air blown out from the fan chamber 3 is blown out from the air outlet passage 11 through the differential user section 9 into the air-conditioned room.

As described above, the differential user section 9 is formed by the fan guide 8 on the blowing side of the fan chamber 3, and the swirling component of the air blown from the fan chamber 3 is reduced in the differential user section 9. The air is blown out while being diffused outward in the radial direction, and the flow velocity of the blown air is gradually reduced by gradually increasing the cross-sectional area in the blowing direction, thereby effectively converting the dynamic pressure of the blown air into static pressure. , to improve the fan performance of the fan 4.

Also in the blowout passage 11 communicating with the differential user section 9, the dynamic pressure of the blowing air is converted into static pressure, thereby further enhancing the fan performance of the fan 4.

Further, a suction grill 13 having a large number of suction ports 12 is attached to the open lower end of the casing 1, and a drain receiver 14 is provided at the lower part of each heat exchanger 2. A shielding plate 15 for shielding the suction port 12 is attached, and the shielding plate 15 prevents the noise of the fan 4 in the fan room 3 from being transmitted from the suction port 12 to the air-conditioned room. The air sucked in from the suction port 12 is guided to the suction passage 10 by the plate 15, and is sent from the suction passage 10 into the fan chamber 3 via the heat exchanger 2.

Further, the heat exchanger 2, as shown in FIG.
It is possible to dispose it at an angle with respect to the suction passage 10, and in this case, the passage resistance of the heat exchanger 2 can be reduced.

The present invention is constructed as described above, and as the fan 4 is driven to rotate, the air in the air-conditioned room is sucked in from the suction port 12 of the suction grill 13, and is passed from the suction passage 10 through the heat exchanger 2. It is fed into the fan chamber 3 and heat exchanged as it passes through the heat exchanger 2.

The conditioned air that has passed through the heat exchanger 2 and reached the fan chamber 3 passes through the differential user section 9 provided on the outlet side of the fan 4, and as it passes through, the dynamic pressure changes to the static pressure. After passing through the differential user section 9, the air is blown out through the air outlet passage 11 into the air-conditioned room.

Also, when operating the air conditioner as described above,
Noise is generated in the fan chamber 3 as the fan 4 is driven to rotate, but since a shielding plate 15 is provided at the bottom of the fan chamber 3 to shield the suction port 12, the noise is not absorbed by the suction port 12. Comfortable air conditioning is achieved without air being transmitted from the port 12 to the air-conditioned room.

(Effect of the invention) As explained above, in the air conditioner according to the invention, at least one pair of heat exchangers 2, 2 facing each other is disposed in the casing 1, and at an intermediate position between these heat exchangers 2, 2, A fan 4 including a motor 5 and a fan rotor blade 7 fixed to a drive shaft 6 of the motor 5 is disposed so that the drive shaft 6 is in the vertical direction, and is located outside of the heat exchangers 2, 2. A guide wall 8b is provided inside the guide wall 8b, and a suction passage 10 is provided inside the guide wall 8b, and a blowout passage 11 is provided outside the guide wall 8b.
A suction grill 13 is provided inside the lower part of the guide wall 8b, and is provided above the suction grill 13 and below the fan chamber 3 in which the fan 4 is disposed, and below the heat exchangers 2, 2. A shielding plate 15 is provided which connects the lower surfaces of the drain receivers 14, 14 and closes the lower part of the fan chamber 3, and the heat exchanger 2,
2, a fan guide 8 continuous to the guide wall 8b is provided on the blowing side of the fan 4, and a differential user part 9 is formed between the fan guide 8 and the top plate 1a of the casing 1. However, since the outlet side of the differential user section 9 is communicated with the blowout passage 11, not only can the overall structure of the air conditioner be downsized, but also the suction air sucked from the suction grille 13 can be immediately transferred to the fan chamber 3. Since it is guided into the suction passage 10 through the shielding plate 15 and fed into the fan chamber 3 without being fed into the air, the fan driving noise generated in the fan chamber 3 can be shielded by the shielding plate 15, and the fan driving noise is reduced. Direct transmission to the air-conditioned room can be prevented, and quiet and comfortable operation can be achieved.Moreover, the fan is connected to the top plate 1a of the casing 1 and the guide wall 8a provided outside the heat exchangers 2, 2. By using the guide 8, the differential user section 9 can be formed with a simple configuration, and the differential user section 9 converts the dynamic pressure of the blown air into static pressure, thereby improving the fan performance of the fan 4. Furthermore, the dynamic pressure of the blown air is converted into static pressure in the blowout passage 11 communicating with the differential user section 9, making it possible to further improve fan performance.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a ceiling-embedded air conditioner according to the present invention, FIG. 2 is a simplified plan view of the same air conditioner, FIG. 3 is a drawing showing an example of installing a heat exchanger, FIG. 4 is a longitudinal sectional view showing a conventional example. DESCRIPTION OF SYMBOLS 1... Casing, 2... Heat exchanger, 3... Fan chamber, 4... Fan, 5... Motor, 6... Drive shaft, 7... Fan rotor, 8... Fan guide, 9... Diff user section, 15...shielding plate.

Claims (1)

[Scope of utility model registration request] At least a pair of heat exchangers 2, 2 facing each other is disposed in the casing 1, and a fan rotor 7 fixed to a motor 5 and a drive shaft 6 of the motor 5 is provided at an intermediate portion between the heat exchangers 2, 2. Fan 4 equipped with
The drive shaft 6 is arranged in a vertical direction, and a guide wall 8b is provided outside the heat exchangers 2, 2, and a suction passage 10 is provided inside the guide wall 8b.
Further, while a blowout passage 11 is provided outwardly, a suction grill 13 is provided inside the lower part of the guide wall 8b, and above this suction grill 13 and at the lower part of the fan chamber 3 in which the fan 4 is arranged, the heat exchanger 2,
A shielding plate 15 is provided which connects the lower surfaces of the drain receivers 14, 14 provided at the lower part of the heat exchanger 2, and closes the lower part of the fan chamber 3. A fan guide 8 continuous to the guide wall 8b is provided, a differential user portion 9 is formed between the fan guide 8 and the top plate 1a of the casing 1, and an exit side of the differential user portion 9 is provided. A ceiling-embedded air conditioner, characterized in that a ceiling-embedded air conditioner is connected to the blow-off passage 11.