JPS61119937A - Air conditioning unit - Google Patents

Abstract

PURPOSE:To blow off hot air with nearly uniform temperature from respective blow-off ports by a structure wherein heat exchangers, each of which is bent so as to face to a centrifugal type fan on its delivery side, are arranged and auxiliary heated are housed in elbowrooms between the bent parts of the heat exchangers and the fan. CONSTITUTION:Auxiliary heaters 15a and 15b for heating are housed in elbowrooms 17a and 17b between the bent parts 16a and 16b of heat exchangers 14 and a turbo fan 8. Discharged air with high static pressure, which are sucked in the turbo fan 8 passes nearly uniformly through plate fins against the draft resistance and is cooled or heated at the heat exchangers 14. In addition, when heating is intended, said air is heated by the auxiliary heaters 15a and 15b and, while being mixed with discharged air, which does not contact with the auxiliary heaters 15a and 15b, goes round in the clockwise direction so as to pass through the heat exchangers 14, resulting in blowing-off the warm air with nearly uniform temperature through blowing-off passages to four directions from blow-off ports 6-6 in order to order to heat a room uniformly.

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an air conditioning unit suitable for a ceiling-embedded air conditioner.

(B) Conventional technology A ceiling-embedded air conditioning unit was put into production in 1982, with the unit body embedded in the ceiling, sucking indoor air from the center of a ventilation grille, and blowing out conditioned air into the room from two directions.
It is presented in Publication No. 172721.

In this proposed unit structure, a heater is provided in each outlet air passage after passing through a heat exchanger to supplementally heat the outlet air during heating.

→ Problems to be Solved by the Invention In the conventional unit described above, the temperature of the air blown from each outlet cannot be made uniform unless an auxiliary heater is installed individually in the air passage on the outlet side. The blowout unit structure requires four auxiliary heaters, and each auxiliary heater must be provided with a protection device such as a bimetal thermostat or a temperature fuse, and there is a problem in that the installation work is time-consuming.

B) Means for Solving the Problems In view of the above-mentioned problems, the present invention provides a bent heat exchanger on the discharge side of a centrifugal fan facing the fan, and a bent portion of the heat exchanger. An auxiliary heater for space heating is housed in the extra space between the fan and the centrifugal fan.

(E) Operation The air discharged from the centrifugal fan in the fully open force direction is heated by the auxiliary heater during heating, and part of it passes through the heat exchanger, and the remainder of this heated air comes into contact with the auxiliary heater. mixed with discharge air that does not pass through a heat exchanger, and
Since the heat exchanger is warmed by the discharged air heated by the auxiliary heater and the refrigerant condensation pressure is increased, hot air having a substantially uniform temperature is blown out from each outlet.

(f) Example One embodiment of the present invention will be explained based on FIGS. 1 and 2. FIG. 1 is a cross-sectional view of the unit of the present invention, and FIG. 2 is a cross-sectional view of the unit of the present invention, and FIG. It is a longitudinal cross-sectional view of the unit in the direction of arrows,
The unit body (3) is made of sheet metal with heat insulating material (21) pasted on the inner wall, the suction grill (4) is installed in the center, and the
Air outlet (6) with wind direction change plate (5) on the side (61 (6)
(It is composed of a ventilation decorative panel (7) provided with 61.

(81 is a turbo fan, which is a type of centrifugal fan, (9
) is a turbo fan (
8) The nozzle port that guides the K suction, the fan motor attached to the nozzle plate Uυ with support legs (not shown), (one is the inner rising part (13a) and the outer rising part (13a)
3b), a drain pan made of Styrofoam into an angular ring shape, α41+! This heat exchanger consists of a pair of plate-fin type heat exchange coils (14a) and (14b) bent on the discharge side of a turbo fan (8) to face the fan.

(15a) (15b) are heat exchangers (141 bends 1ts
(16a) (16b) and the turbo fan (8) are auxiliary heaters for heating stored in the extra space (17a) (17b).
b), and the remaining space (17a) (
17b) from below and penetrates the top plate Qυ of the unit body (3) and is fixed to the support bin (22a).
) (22b) to the respective mounting plates (19a) (19b)
The blind lids (23a) (23b) are fitted by fitting the holes (not shown) in the
) from below with screws @, openings (20a) (20b
) are covered with the blind lids (23a) (23b), and the auxiliary heaters (15a) (15b) are fixed, and the auxiliary heaters (15a) (15b) tilt due to vibrations during transportation, etc., and the turbo fan (8) Supporting bins (22a) (22b)
This is prevented by fitting the

Thus, the above-mentioned heat exchanger (141 is a tube plate (25a) of a pair of plate-fin type heat exchange coils (14a) (14b)
) (25b), (25a) (25b) and the primary side air discharged from the turbo fan (8) by interposing the pressure sealing material 4 with the heat insulating material (2) of the top plate 01). The heat exchanger (14) completely separates the air from the air outlet (61) and the secondary air blown out from the air outlet (61 (61).
), ＠ is the inlet pipe and outlet pipe for the refrigerant led out to the outside of the unit body (3), and ■■■ω is the outlet (6 )(6)(
61+61 is the blowout passage.

C31) In C31), push the unit body (3) into the ceiling space (b) through the three ceiling holes in the ceiling plate t, and install the ceiling beam (
2) This is a hanging bolt for hanging and fixing.

The structure is as described above, and the indoor air sucked into the turbo fan (8) from the suction grill (4) through the nozzle port (9) is directed to the turbo fan (8) as shown by the solid line arrow in FIG.
) is discharged while curving in the entire circumferential direction.

Moreover, since the air is discharged from the outlet of the vane 06) under extremely high static pressure, and this discharged airflow is surrounded by the heat exchanger I, the discharged air with high static pressure has no ventilation resistance between the plate fins. The heat passes through the heat exchanger I almost evenly, and is cooled during cooling and heated during heating.

At the same time, during heating, the air discharged from the turbo fan (8) is heated by the auxiliary heaters (15a) and (15b), and part of the air passes through the heat exchanger α4, and the rest of the heated air is heated by the auxiliary heaters (15b). 15a) While being mixed with the discharged air that does not come into contact with (15b), it goes around clockwise and passes through the heat exchanger <141, and the heat exchanger side is heated by the room air heated by the auxiliary heater, and the refrigerant is heated. Due to the increase in condensation pressure, the somewhat lower discharge air that does not come into contact with the auxiliary heaters (15a) (15b) is also heated to a high temperature, and the blowout passage ■
■Warm air with approximately uniform temperature is blown out from the air outlet (6) (61 (6) (6)) in four directions through the ring, heating the room evenly.

Also, when servicing the auxiliary heaters (15a) (15b), remove the ventilation decorative panel (7) or suction grill (4) and open the auxiliary heaters (15a) (15b) together with the blind lids (23a) (23b). (20a) Just pull it out in the direction from (20b). Also, initially, an auxiliary heater (15
a) (1, 5b) is not installed and the unit body (
When installing the auxiliary heaters (15a) (15b) after installing 3), remove the ventilation decorative spring A/(7) or the suction grille (4), remove the blind lids (23a) (23b), and install the openings ( 20a) (, 20b), the extra space (17
a) Just push it inside (17b) and fix it.

FIG. 3 is a longitudinal sectional view of a unit showing another embodiment of the present invention in place of FIG. 1, in which a plate fin type heat exchanger Q4
This is an annular needle-fin type heat exchanger (39) formed by stacking heat exchange pipes (39) wrapped around needle-like fins C3η in multiple stages in a spiral shape instead of 1, as shown in Figure 1. Other components that are the same as the above will be given the same reference numerals and their explanations will be omitted. Since the ventilation resistance is large, the air discharged from the turbo fan (8) and heated by the auxiliary heaters (15a) (15b) is mixed with unheated air on the primary side of the needle-fin type heat exchanger 01 (
After being sufficiently mixed in the suction side) space, it passes through the needle fin type heat exchanger C31, so compared to the case where the plate fin type heat exchanger α
From 1 (6), the temperature becomes 5, which blows out warm air with a more even temperature.

In both of the above embodiments, a turbo fan (8) was used as the centrifugal fan, but a sirocco fan may be used instead. However, the sirocco fan is a turbo fan (8)
The static pressure obtained at the blade outlet is small compared to the full-circle blowout type, which requires the use of a scroll section that gradually increases this pressure and blows out the air, and cannot obtain the original air blowing characteristics. It is not very preferable to use a sirocco fan as the fan in terms of ventilation efficiency.

(G) Effects of the Invention According to the present invention, since the bent heat exchanger is disposed on the discharge side of the centrifugal fan to face the fan, the air conditioning unit can be made thin, and the heat exchanger Since the auxiliary heater for heating is housed in the remaining space between the bent part of the container and the centrifugal fan, the width of the air conditioning unit can be minimized without being influenced by the inclusion of the auxiliary heater.

In particular, the primary side air (suction air) of the heat exchanger discharged from the centrifugal fan is heated by partially contacting the auxiliary heater, and this heated air is heated by the discharge air that does not come into contact with the auxiliary heater. After being mixed on the primary side of the exchanger, it passes through the heat exchanger, and the heat exchanger is warmed by the discharge air heated by the auxiliary heater, increasing the refrigerant condensation pressure.
Since each outlet blows hot air at a roughly uniform temperature, it is possible to reduce the number of auxiliary heaters and protective devices attached to them, such as bimetal thermostats and temperature fuses, to less than the number of outlets. This reduces manufacturing costs and simplifies installation work.

Furthermore, by using a turbo fan that can maintain a large static pressure at the blade outlet as a centrifugal fan, a desired air volume can be secured with low noise.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of an air conditioning unit showing one embodiment of the present invention, FIG. 2 is a longitudinal cross-sectional view of the unit taken along arrows ■-■ in FIG. 1, and FIG. 3 is another embodiment of the present invention. FIG. 2 is a cross-sectional view of the air conditioning unit. Applicant: SANYO Electric Co., Ltd., and 1 other representative: Shizuo Sano, patent attorney Figure 1 Figure 2

Claims (2)

[Claims] (1) A bent heat exchanger is placed on the discharge side of the centrifugal fan, facing the fan, and an auxiliary heater for heating is housed in the space between the bent part of the heat exchanger and the centrifugal fan. An air conditioning unit characterized by: (2) The air conditioning unit according to claim 1, wherein the centrifugal fan is a turbo fan.