JPS6120417Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a fan coil unit for air conditioning with a thin structure, and in particular aims to improve heat exchange efficiency by averaging the distribution of airflow passing through the heat exchange coil over the entire surface of the coil. , relates to an air conditioning fan coil unit that can reduce fan noise.

A conventional thin fan coil unit has a structure as shown in FIG. 3, in which wind blown from a Sirotskov fan 8 is directly applied to a heat exchange coil 9, and a blow grill 5 is interposed to blow out the conditioned air after passing through the coil 9. The air is discharged indoors from an air outlet 4.

In this case, in order to make the casing 1 thin and compact, the distance between the discharge port 13 of the Sirotskov fan 8 and the heat exchange coil 9 has to be shortened. The air flow blown from 8 is transferred to heat exchange coil 9
It is extremely difficult to distribute the heat evenly over the entire front area of the heat exchanger coil 9, and when the cooling heat source is used for cooling the unit by circulating it through the heat exchange coil 9, it is difficult to distribute the heat through the coil 9 due to condensation. Since the air resistance increases, the air resistance tends to be uniform in the vertical direction, but it is uneven in the horizontal direction.On the other hand, when a heating heat source is passed through the coil 9 and the unit is used for heating, the air flowing through the coil 9 Since the resistance is small, it is uneven in both the vertical and horizontal directions, and therefore the heat exchange area of the heat exchange coil 9 cannot be used effectively in either case, and as a result, the heat exchange rate decreases, so the heat exchange As the coil 9 had to be made larger, problems such as an increase in device cost and a larger fan coil unit were unavoidable.

Furthermore, although the air blown from the Sirotskov fan 8 is mediated by the heat exchange coil 9, the air blown from the air outlet 4
Since the air flows through a short-circuit path directed toward the air, wind noise from the Shirotsuko fan 8 leaks directly into the room from the air outlet 4, resulting in an increase in operating noise.

In view of the fact that conventional devices of this kind have various defects, the present invention has been devised to improve the invention, and the specific contents thereof are shown in the attached drawings as an example. This will be explained in detail below with reference to .

1 and 2 are a side sectional view and a front sectional view schematically showing the structure of an example of the unit of the present invention,
Although the illustrated example is a floor-standing type with a shallow depth, the present invention can of course be applied to various other types such as a ceiling-suspended type and a wall-mounted type.

The casing 1 in this unit has an elongated rectangular cross section perpendicular to the back plate 11, and extends in the longitudinal direction of the cross section (vertical direction in the illustrated floor-standing type) and in the partition plate 7 provided perpendicularly to the back plate 11. Then,
The interior of the casing 1 is divided into two chambers: a coil chamber 2 having an air outlet 4 with an air outlet grille 5 interposed therein, and a fan chamber 3 having an inlet 6. 2 house heat exchange coils 9, respectively.

Note that 17 is a service space formed on the side inside the casing 1, and operating equipment, connection ends of piping, etc. are housed in this space all at once.

The suction port 6 is not limited to the bottom plate part as in the illustrated example, but may be a front plate part or a rear plate part, but on the other hand,
As for the air outlet 4, its location is limited, and it is spaced apart from the partition plate 7 and located on the back plate 11.
The opening is made over almost the entire width of the coil chamber 2 at a location near the corner facing the face plate, that is, at the upper part of the front panel, the top plate, or both parts thereof. It has an opening in the face plate.

The Shirotsuko fan 8 is, for example, a double-shaft motor 1.
Two units are arranged side by side, one on each side of the coil chamber 6, to form a double structure, and the discharge ports 13 are arranged upward so that they penetrate through the partition plate 7 and open into the coil chamber 2. There is.

On the other hand, in the heat exchange coil 9 made of a cross-fin coil type heat exchanger, the corner portions that exist in the opposing relationship are the portion of the back plate 11 near the air outlet 4 and the face plate facing the back plate 11 (in the illustrated example, the front The coils are housed in the coil chamber 2 in an oblique arrangement so that they can approach the parts of the face plate near the partition plate 7, but the air blown from the Shirotsuko fan 8 does not bypass and flow in these parts. Of course, it is necessary to treat the back plate 11 airtightly.
On the side, the corners of the heat exchange coil 9 are brought into direct contact with the back plate 11, while on the front plate side, the air is tightly covered with a suitable shielding member.

Therefore, in the Shirotsuko fan 8, the tongue portion 14 is located on the back plate 11 side, and the discharge port 13 is located on the back plate 11 side.
1, the arrangement is arranged so as to face rearward, and after blowing most of the airflow from the discharge port 13 onto the back plate 11 and turning it over, the heat exchanger It is constructed so as to extend to the coil 9.

In FIG. 1, as shown in a preferred embodiment, the heat exchange coil 9 is arranged diagonally at a backward angle of about 35° with respect to the perpendicular directly above the Sirotskov fan 8; Part 14
The side plate 15 extending from the discharge port 13, that is, the discharge port 1
The arrangement is such that the plates parallel to the direction of the airflow from No. 3 have a backward inclination angle of about 33 degrees with respect to the perpendicular.

Furthermore, in the present invention, a rectifying plate 12 is disposed in the coil chamber 2 in order to enhance the dispersion effect of the blown airflow, and this rectifying plate 12 is arranged along the side plate 15 and in contact with the back plate 11. It is being extended.

In the fan coil unit having the configuration described above, the majority of the air blown from the Sirotskov fan 8 does not directly reach the front surface of the inflow side of the heat exchange coil 9, but after flowing along the back plate 11 and the rectifying plate 12. ,
Since it changes direction and reaches the heat exchange coil 9, it diffuses within the chamber formed between the inflow side front surface of the heat exchange coil 9 and the back wall consisting of the back plate 11 and the rectifier plate 12, and the heat exchange coil 9 As a result, the velocity part of the total pressure of the blown air turns into static pressure, and as a result, it flows uniformly over the entire surface of the inflow side of the heat exchange coil 9, and thus the upper and lower parts of the heat exchange coil 9.・It is possible to equalize the wind speed in both left and right directions.

Furthermore, by providing the rectifying plate 12, the space surrounded by the rectifying plate 12, the back plate 11, and the partition plate 7, that is, the area where airflow is likely to be disturbed and stagnate, is closed. The wind speed uniformity effect and noise reduction effect are further demonstrated.

As described in detail above, the present invention provides partitions that are provided within the casing 1, which has an elongated square cross section perpendicular to the back plate 11 facing the ceiling, wall, etc., and intersect with the longitudinal direction of the cross section and the back plate 11. By plate 7,
It is divided into two chambers, a coil chamber 2 having an air outlet 4 and a fan chamber 3 having an inlet 6, and the discharge outlet 13 of the Sirotskov fan 8 housed in the fan chamber 3 is inserted through the partition plate 7. In a fan coil unit in which the heat exchange coil 9 is opened into the coil chamber 2 and the heat exchange coil 9 is housed in the coil chamber 2, the air outlet 4 is located in a corner away from the partition plate 7 and facing the back plate 11. An opening is opened in a nearby face plate over almost the entire width of the coil chamber 2, and the opposing corner portions of the heat exchange coil 9 face the outlet 4 of the back plate 11 and the back plate 11. The Sirotsukofan 8 is provided in an oblique arrangement close to the partition plate 7 of the face plate to prevent bypass airflow, and the tongue portion 14 is located on the back plate 11 side, and the discharge port 13 is located on the back plate 11 side. along the side plate 15 that is provided opposite to the tongue portion 14 and extends from the tongue portion 14 to the discharge port 13;
The rectifying plate 12 reaching the back plate 11 is placed in the coil chamber 2.
Since the air is disposed within the heat exchanger coil 9, the air blown from the fan 8 can be diffused and blown within the chamber formed on the upstream side of the heat exchange coil 9, without directly blowing it against the heat exchange coil 9. As a result, Air can be sent at a substantially uniform wind speed to the entire heat exchange surface of the heat exchange coil 9, thereby improving the efficiency of the heat exchange coil 9 and further promoting compactness.

Further, since the discharge port 13 does not directly face the blow-off port 4, wind noise does not leak directly from the blow-off port 4, and quiet operation is achieved.

Furthermore, by providing the rectifying plate 12, the chamber has no part where air flow is disturbed or stagnates, and the chamber functions as a sound-absorbing chamber by allowing the air to flow uniformly. This invention has the effect of further reducing noise, and exhibits various excellent features as described above, making it a truly useful invention.

[Brief explanation of the drawing]

1 and 2 are a cross-sectional side view and a front view of the structure of one example of the present invention, and FIG. 3 is a schematic side view of a conventional fan coil unit. DESCRIPTION OF SYMBOLS 1... Casing, 2... Coil chamber, 3... Fan chamber, 4... Air outlet, 6... Suction port, 7... Partition plate, 8... Sirotskov fan, 9... Heat exchange coil, 11... Rear plate, 12... Rectifier plate, 13...
Discharge port, 14...tongue, 15...side plate.

Claims (1)

[Scope of utility model registration request] The inside of the casing 1, which has an elongated rectangular cross section orthogonal to the back plate 11 that faces the ceiling, dust, etc., is divided into a coil having an air outlet 4 by a partition plate 7 provided so as to intersect the longitudinal direction of the cross section and the back plate 11. room 2
and a fan chamber 3 having a suction port 6, and a Sirotskov fan 8 stored in the fan chamber 3.
In a fan coil unit in which the heat exchange coil 9 is housed in the coil chamber 2 while the discharge port 13 is opened into the coil chamber 2 through the partition plate 7, the discharge port 4 is opened into the coil chamber 2 through the partition plate 7. away from 7,
In addition, an opening is formed in the face plate at a location close to the corner facing the back plate 11 over almost the entire width of the coil chamber 2, and the heat exchange coil 9 is opened so that the opposite corner part is open to the back plate 11. The sirotsukofan 8 is provided in an oblique arrangement close to the outlet 4 and close to the partition plate 7 of the face plate facing the back plate 11 so as to prevent bypass air flow.
A rectifier plate 12 is provided in the coil chamber 2 and extends along the side plate 15 which is located on the side and has a discharge port 13 facing the back plate 11 and further extends from the tongue portion 14 to the discharge port 13 and reaches the back plate 11. An air conditioning fan coil unit characterized by the following: