JPS6122184Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a terminal air conditioner that is easily individually controlled and used in a central air conditioning system.

In order to perform individual control according to load fluctuations in the air-conditioned space with a central air conditioning system, four-pipe fan coil unit method, four-pipe induction unit method,
Variable air volume system (VAV system), double duct system, etc. are available, but 4-pipe fan coil unit system,
Alternatively, in the case of a four-pipe induction unit system, it is necessary to install an automatic control valve for indoor temperature control in the piping near the terminal air conditioner, and the automatic control valve may be located under the ceiling. Furthermore, if the automatic control valve is disturbed by dust in the piping or if water pressure fluctuations are large, it may not operate properly, causing problems in terms of maintenance and control functions. Furthermore, with the single duct variable air volume system (VAV system), it is not possible to control cold and hot air separately for each air-conditioned space, and, along with the double duct system, the equipment space is large and equipment costs are also high.

The present invention solves the various drawbacks of the conventional devices described above, and is a terminal air conditioner that controls a blower inside the terminal air conditioner, and its configuration is as follows.

The inside of the casing is divided into a cooling room, a ventilation room, and a heating room by a boundary wall, and one boundary wall is equipped with a check damper that opens when the positive pressure in the ventilation chamber is applied, and the other boundary wall is equipped with a check damper that opens due to the negative pressure in the ventilation chamber. In addition to installing a check damper that opens at
This air conditioner has a cold water coil in the cooling chamber, a fan that can rotate forward and backward in the ventilation chamber, and a hot water coil in the heating chamber. Further, as an embodiment, it is possible to control the rotational speed of a fan that can rotate forward and backward.

Therefore, the fan in the ventilation chamber is rotated in the forward direction to suck air from the air-conditioned space into the ventilation chamber, and the positive pressure is used to open one check damper and close the other check damper, thereby opening the heating or cooling room. The conditioned air is supplied to the air-conditioned space through the air conditioner, the fan in the ventilation chamber is rotated in the opposite direction, the air is sent out from the ventilation chamber, and the negative pressure is used to open the other check damper and close the one check damper. Supply conditioned air from the cooling room or heating room to the air-conditioned space. Further, the air volume can be easily adjusted by controlling the rotation speed of the fan as in the embodiment.

Embodiments of the present invention will be described with reference to the drawings.

In the figure, 1 is a terminal air conditioner attached to a structural material such as a slag 17 in the ceiling of a building. It is divided into 3 rooms. In order to reduce the height of the terminal air conditioner 1 since it is installed in the ceiling, a cold water coil 8 is installed in the cooling room 5 at an angle with respect to the boundary wall 3.
A drain pan 9 is provided below the cold water coil 8 to receive dew condensation. On the other hand, a hot water coil 11 is arranged in the heating chamber 7 so as to be inclined with respect to the boundary wall 4, and therefore the hot water coil 11 and the cold water coil 8 are arranged in an inverted figure-eight shape. Between the upper ends of both boundary walls 3 and 4 and the casing 2, there is a reverse wall that connects the cooling chamber 5 and the ventilation chamber 6 and the ventilation chamber 6 and the heating chamber 7 by means of a stop or wind pressure. Stop dampers 13 and 14 are both provided so as to open to the right in the figure.
Both check dampers 13 and 14 may be of multi-stage type to prevent drifting.

10 and 12 are filters provided at the lower end openings of the cooling chamber 5 and the heating chamber 7, respectively.

Next, the central ventilation chamber 6 is provided with a fan 15 that can freely rotate in forward and reverse directions, and the rotation speed of the motor 16 can be controlled arbitrarily.

A suitable number of terminal air conditioners having the above configuration are installed in the ceiling of the building, and the cold water coil 8 and hot water coil 11 are connected to the respective pipes for sending cold water and hot water made in the machine room to form a central system. Configure the air conditioning system.

Therefore, when the fan 15 is rotated in the normal direction, the check damper 14 opens due to the positive pressure, and the check damper 13 closes to block the ventilation, so that the air drawn in through the lower end opening of the blower chamber 6 from the air-conditioning space passes through the hot water coil 11, is heated, and enters the heating chamber 7.
The air passes through filter 12 and is returned to the air-conditioned space. When fan 15 is rotated in the reverse direction, the negative pressure causes check damper 13 to open, and check damper 14 closes to block ventilation, so that air drawn in from the air-conditioned space through filter 10 at the lower opening of cooling chamber 5 passes through cold water coil 8, is cooled, and is sent to the air-conditioned space from the lower opening of blower chamber 6. The effect is essentially the same even if the cooling chamber and heating chamber are in opposite positions in the figure.

Note that load fluctuations in the air-conditioned space are usually dealt with by forward/reverse rotation of the fan 15 and by controlling the rotation speed of the motor 16, but if the load is particularly light, the return water temperature of the cold water is designed to prevent hunting. When the temperature of the hot water is lower than the design value, the cold water temperature is set higher or the water flow rate is throttled at the main pipe of the system, and when the hot water return temperature is higher than the design value, the hot water temperature is lowered or the water flow rate is reduced. It is best to narrow it down based on the person in charge of the system.

As can be understood from the above explanation, the terminal air conditioner in the central air conditioning system according to the present invention can freely adjust the temperature of the air-conditioned space by forward/reverse rotation of the fan and control of the rotation speed of the motor, and is simple. According to this structure, cold and hot air can be controlled separately, and the equipment cost is reduced, and an air conditioning system that is highly reliable and easy to maintain and manage is provided.

[Brief explanation of the drawing]

The figure is a partial sectional view of a terminal air conditioner according to the present invention. 2...Casing, 3, 4...Boundary wall, 5...Cooling room, 6...Blower room, 7...Heating room, 8...Cold water coil, 9...Drain pan, 11...Hot water coil, 13, 14... Check damper, 15... Fan, 16... Motor.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) The interior of the casing is divided into a cooling chamber, a ventilation chamber, and a heating chamber by a boundary wall, and one boundary wall is provided with a check damper that opens with positive pressure in the ventilation chamber. The other boundary wall is equipped with a check damper that opens with negative pressure in the ventilation chamber, and a cold water coil is installed in the cooling chamber, a fan that can rotate forward and backward in the ventilation chamber, and a hot water coil in the heating chamber. Characteristic air conditioner. (2) The air conditioner according to claim 1, wherein the fan that can be rotated in forward and reverse directions is a fan that can control the rotation speed.