JPH031719Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an air conditioning system equipped with a heat recovery type return air device and a heat exchange unit.

(Prior art) Conventionally, there is a heat recovery type ventilation device that performs heat exchange between indoor polluted air and outdoor fresh air for ventilation, and a heat recovery type ventilation device that performs heat exchange between indoor contaminated air and outdoor fresh air. In an air conditioning system equipped with a heat exchange unit that exchanges heat with return air using a heat exchanger and supplies the returned air into the room, cooling or heating and ventilation, and
Air conditioning systems are known in which the heat exchange unit is provided with a damper for only ventilation.

(Problems to be solved by the invention) The conventional air conditioning system has the following problems.

Since it is necessary to blow a large amount of heat exchange air into the room, the blower of the heat exchange unit becomes large in size, but the suction sound of the blower and the sound of the blower's motor leak, resulting in extremely loud noise.

Further, although the blower is required to be designed compactly in order to save space, the motor of the blower tends to overheat due to the large amount of air blown.

When increasing the air volume of the blower, a large amount of fresh air after the heat exchange is drawn into the heat exchange unit, which may disturb the indoor air supply balance or reduce the heat exchange efficiency of the heat recovery type ventilation system. lower.

The damper control is manually performed, which is inconvenient.

(Purpose of the invention) In view of the above-mentioned conventional problems, the present invention has low noise, cools the blower motor, does not disturb the supply balance of indoor heat exchange air, and furthermore, can control the damper. The aim is to provide an automatic air conditioning system.

(Means for Solving the Problems) In order to achieve the above-mentioned object, the present invention provides a heat recovery type ventilation device for performing ventilation by exchanging heat between indoor polluted air and outdoor fresh air, and the heat recovery type ventilation device. In an air conditioning system equipped with a heat exchange unit that exchanges heat between the fresh air after heat exchange and return air from a room using a heat exchanger and supplies the air into the room, the inside of the case body of the heat exchange unit is A partition plate that partitions a return air passage and an air intake passage provided with a blower and is provided with a damper port that communicates each passage, a sound absorbing material attached to the return air passage and the air intake passage, and the air intake. After the heat exchange is completed, the fresh air outlet is connected to the air passageway and is provided opposite to the motor of the blower, and when the blower is driven, the damper opening is opened by the return air pressure in the return air passage. When the blower is stopped, it is closed by the pressure of the fresh air after the heat exchange is completed, and a wind pressure check damper that guides the return air in the return air passage to face the fresh air in the air intake passage. It is characterized by having the following.

(Function) According to the present invention, the suction sound of the blower and the motor sound are muffled by the sound absorbing material. The motor is cooled by fresh air blown from the outlet after heat exchange. When the damper opening is opened by the return air pressure when the blower is driven, the return air pressure restricts the fresh air from flowing into the heat exchange unit.

(Embodiment) FIGS. 1 to 3 show an embodiment of the present invention, in which 10 is a heat exchange unit, for example, a hot air heating device, 30 is a heat recovery type ventilation device, and 40 is a hot water boiler.

The heat exchange unit 20 is provided with a first partition plate 12 extending from side to side within its case body 11, and hot water from the hot water boiler 40 flows between the partition plate 12 and the upper plate 11a of the case body 11. A heat exchanger 13 is provided. Further, the first partition plate 12
and the lower plate 11b, two second partition plates 14 extending vertically are provided at a predetermined interval, and an air suction passage 15 is provided between each partition plate 14.
A return air passage 16 is provided between each passage 15 and the side plate 11c, and a sound absorbing material 1 is provided on the inner peripheral surface of each passage 15, 16.
5a and 16a, and a heat exchange blower 17 is provided in the air suction path 15 for blowing air to the heat exchanger 13 through the first partition plate 12.

Further, the upper plate 11a of the case body 11 has an air supply duct 18 communicating with the room, and the lower plate 11b has an air filter 19 communicating with the return air passage 16.
The first partition plate 12 is provided with a cooling duct 21 having one end facing the heat exchanger 13 and the other end facing the motor 17a of the heat exchange blower 17. .

Further, the second partition plate 14 is provided with a square damper port 22, and the damper port 22 is provided with a square damper port 22.
A wind pressure non-return damper 23 for opening and closing the damper port 22 is rotatably provided on the periphery of the damper port 22, and when the heat exchange blower 17 and the ventilation blower 35 to be described later are driven, the wind pressure damper 23 prevents the return air from flowing. The damper port 22 is opened by the return air flowing through the passage 16, and when the heat exchange blower 17 is stopped, it is closed by the fresh air flowing through the ventilation duct 36, which will be described later. There is. Further, the wind pressure check damper 23 guides the return air in the return air passage 16 so as to face the fresh air in the air intake passage 15.

The heat recovery type ventilation device 30 is a well-known device in which a contaminated air introduction duct 31 communicating indoors and a fresh air introduction duct 32 communicating outdoors are connected, and heat exchange is performed between the contaminated air and the fresh air. Furthermore, the contaminated air is blown into an exhaust duct 34 by an exhaust blower 33, and the fresh air is blown into a ventilation duct 36 by a ventilation blower 35. Further, one end (air outlet 36a) of the ventilation duct 36 is connected to the center of the lower plate 11b of the heat exchange unit 10, communicates with the air intake passage 15, and faces the motor 17a of the heat exchange blower 17. I am here to help.

According to this embodiment, each of the blowers 17, 33,
35, the heat recovery type ventilation device 3
At 0, heat is exchanged between fresh air (solid line in FIG. 1) and contaminated air (dotted chain line in FIG. 1), and the contaminated air is exhausted outdoors through the exhaust duct 34.
Fresh air after the heat exchange is passed through the ventilation duct 36 to the air intake passage 15 of the heat exchange unit 10.
It is squirted inside. At this time, the air outlet 36 of the ventilation duct 36 is connected to the motor 17 of the heat exchange blower 17.
Since the motor 17a faces the motor 17a, the motor 17a is cooled.

On the other hand, the return air (broken line in FIG. 1) flows through the ventilation suction section 20 to the return air passage 16 of the heat exchange unit 10, and further passes through the wind pressure check damper 2.
3 to open the damper port 22, and the air flows into the air suction path 15. At this time, the wind pressure non-return damper 23 guides the return air in the return air passage 16 to face the fresh air in the air intake passage 15, so that the return air pressure allows a large amount of fresh air to flow in. limited.

Then, the ring air and the fresh air are blown to the heat exchanger 13 by the heat exchange blower 17, heat exchanged, and then fed into the room from the air supply duct 18 as heating air.

Further, when only the heat exchange blower 17 is driven, as described above, the return air flows into the air suction passage 15 and is blown to the heat exchanger 13, but the first partition plate 14 One end is connected to the heat exchanger 13,
Since cooling ducts 21 are provided whose other ends face the motors 17a of the heat exchange blower 17, a part of the air blown to the heat exchanger 13 is passed through the cooling ducts 21 to the air intake passage 15. backflow inside,
The motor 17a is cooled.

Further, when the heat exchange blower 17 is stopped and the exhaust blower 33 and the ventilation blower 35 are driven, the fresh air in the ventilation duct 36 flows into the air intake passage 16 as described above, and then, The air is supplied into the room from the air supply duct 18. At this time, the air pressure check damper 23 is rotated by the fresh air pressure, and the damper port 22 is closed. This prevents the fresh air from flowing into the return air passage 16.

Furthermore, the suction sound of the heat exchange blower 17 and the motor sound of the motor 17a are caused by the air suction path 1.
5 through the damper port 22, further conducts downward through the return air passage 16, and is emitted from the ventilation suction section 20. The conduction passage is bent, and the air intake passage 15 and the return air passage 1
Since sound absorbing materials 15a and 16b are attached to the inner circumferential surface of 6, the sound is muffled within the conduction path and the noise is reduced.

In the above embodiment, hot water from the hot water boiler 40 is circulated through the heat exchanger 13, but when an indoor heat exchanger of a heat pump cycle is installed in place of the heat exchanger 13, heating and cooling may be It can be carried out.

(Effects of the invention) As explained above, according to the invention, since the sound-absorbing material is attached to the return air passage and the air intake passage, there is an advantage that the sound-absorbing material muffles the suction sound of the blower and the motor noise. have Furthermore, since the outlet for the fresh air after the heat exchange is completed is connected to the air suction path and is provided opposite to the motor of the blower, the motor is cooled by the fresh air blown from the outlet. This has the advantage that overheating of the motor is prevented. Further, the wind pressure check damper opens the damper opening by the return air pressure in the return air passage when the blower is operating, and closes it by the fresh air pressure after the heat exchange is completed when the blower is stopped. At the same time, since the return air in the return air passage is guided to face the fresh air in the air suction passage, when the damper opening is opened by the return air pressure when the blower is driven, the return air pressure This has the advantage that a large amount of fresh air is prevented from flowing into the heat exchange unit, so that the heat exchange efficiency of the heat recovery type ventilation device does not decrease and the indoor air supply balance is not disturbed. Since the check damper is automatically opened and closed by each of the air pressures, there is an advantage that it is not necessary to manually open and close the wind pressure check damper as in the past.

[Brief explanation of the drawing]

Figures 1 to 3 show one embodiment of the present invention, with Figure 1 being a schematic diagram showing an air conditioning system, and Figure 2 being a schematic diagram showing an air conditioning system.
This figure is a perspective view showing the heat exchange unit, and FIG. 3 is a perspective view showing the main parts of the present invention. In the figure, 10... heat exchange unit, 14... partition plate (second partition plate), 15... air suction path,
16...Return air passage, 17...Blower, 17a...
Motor, 22... damper port, 23... wind pressure check damper, 30... heat recovery type ventilation device.

Claims (1)

[Scope of utility model registration request] A heat recovery type ventilation device that performs heat exchange between indoor contaminated air and fresh air from outside for ventilation, and a heat recovery type ventilation device that performs heat exchange between the fresh air and return air from the room after the heat exchange of the heat recovery type ventilation device is completed. In an air conditioning system equipped with a heat exchange unit that exchanges heat with a heat exchanger and supplies the air into the room, the case body of the heat exchange unit is partitioned into a return air passage and an air intake passage in which a blower is disposed, and each passage is separated. A partition plate provided with a communicating damper port, a sound absorbing material installed in the return air passage and the air intake passage, and a sound absorbing material installed in the air intake passage and in communication with the air intake passage and facing the motor of the blower after the heat exchange is completed. When the blower is operating, the damper port is opened by the return air pressure in the return air passage, and when the blower is stopped, the damper port is closed by the fresh air pressure after the heat exchange is completed. What is claimed is: 1. An air conditioning system comprising: a wind pressure check damper for guiding return air in the return air passage so as to face fresh air in the air intake passage;