JPH063330Y2 - Air-conditioning switching type air conditioner - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION << Industrial Application Field >> The present invention relates to an air conditioner for a building structure, and more particularly to an individually distributed cooling / heating switching air conditioner.

<< Prior Art >> As is well known, as one of the air conditioning systems for building structures, there is a system that uses the space above the ceiling of the structure as an air supply chamber. This method requires less duct work than the normal duct method, and has various advantages such as a shorter construction period, a lower construction cost, and a reduced blower capacity due to reduced ventilation resistance.

For this reason, the present applicant has previously applied for Japanese Patent Application No. 61-115381.

<Problems to be solved by the device> The same applies to the duct type, but in the ductless type as well, ceiling blowing and ceiling suction are common, so the temperature difference between the ceiling surface and the floor surface during heating is greater than that during cooling. It was too big.

For example, the ceiling blow-out duct system has a lower floor with a piloty, the ceiling is a double-ceiling structure, and a ceiling structure of a concrete structure with a heat insulating material installed has a ceiling height of 2600 mm.

That is, the floor surface is 18 ° C, the ceiling surface is over 26 ° C, 21.5 ° C at 300mm above the floor and 26 ° C at 2200mm above the floor. The situation was contrary to the temperature distribution.

The present invention has been made in view of the above circumstances, and an object thereof is to provide an individual dispersion type air conditioner capable of obtaining a good indoor temperature distribution during both heating and cooling.

<Means for Solving the Problem> In order to achieve the above object, the cooling and heating switching type air conditioner of the present invention comprises an underfloor chamber communicating with a floor outlet, and a ceiling chamber communicating with a ceiling outlet, In the communication passage that connects the underfloor chamber and the ceiling chamber, a reversible air blower and a heat exchange coil are arranged in series in the axial direction of the communication passage.

<< Operation >> At the time of cooling, first, at this time, the floor outlet is used as the inlet, the blower is operated in the direction of forming the circulation path for blowing the cool air from the ceiling outlet, and the cooling medium is circulated in the heat exchange coil. At the time of heating, the blower is rotated in the reverse direction, the ceiling outlet is used as an inlet, an air circulation path for blowing warm air from the floor outlet is formed, and a heating medium is circulated in the heat exchange coil.

<< Embodiment >> Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

In the embodiment, cold and warm water is used as a heat medium, and FIG. 1 shows a cooling operation and FIG. 2 shows a heating operation.

Reference numeral 1 in the figure is a fan coil unit. And
A free access floor 3 is provided on the floor slab 2, an air-conditioning underfloor chamber 4 is provided between the floors, and an intake port 5 (air outlet during heating) is provided at any appropriate position on the floor panel.
Are arranged. Further, the hollow portion obtained by making the ceiling a double ceiling also serves as a ceiling chamber 6 for air conditioning, and a ceiling outlet 7 (suction inlet during heating) is provided at an appropriate position.

The fan coil unit 1 is a box body that constitutes a communication path that connects the ceiling 8 and the floor panel 9, and partition plates that partition the interior into front and rear parts extend from the upper and lower parts to the middle part, respectively, and are located in the middle part of the middle part. Is equipped with a blower 10 that can switch dampers to reverse only the air flow.

Filters 11 and 11a are provided on the upper and lower sides of the blower plate sandwiching the blower 10 in the front part of the partition plate, and the cold water coil 1 is similarly provided on the rear part.
2, a hot water coil 13 is provided below.

Further, in the opening of the ceiling 8 facing the ceiling chamber 6, the upper switching damper 1 is provided above the filter 11 and the cold water coil 12.
4, 14a and filter 1 facing the underfloor chamber 4
1 and the lower switching damper 1 at the lower opening of the hot water coil 13
5, 15a are provided.

At the time of cooling, the lower switching damper 15a and the upper switching damper 14 are closed as shown in FIG. 1, and the indoor air passes from the suction port 5 through the underfloor chamber 4 to the damper 15 → filter 1
1a → blower 10 → cold water coil 12 → damper 14a →
After passing through the ceiling chamber 6, it blows out as cold air from the ceiling outlet 7.

At the time of heating, the suction port 5 is made to function as an outlet as shown in FIG. The air flow path is as follows. That is,
Contrary to the cooling operation, the dampers 14a and 15 are closed, the air flow is changed so that the air blow direction of the blower 10 goes from top to bottom, and the air in the room uses the ceiling outlet 7 as the suction port and the inside of the ceiling chamber 6 is changed. Through the damper 14, the filter 11, the blower 10, the hot water coil 13, the damper 15a, and the underfloor chamber 4, and the suction port 5 is used as an outlet to blow hot air into the room.

In the above-described embodiment, the ventilation passages are switched by the dampers 14, 14a-15, 15a and the blowing direction of the blower 10 is reversed, but the dampers 14, 15a are kept closed.
In the embodiment shown in the figure, the heat medium passing through the coil 12 is switched between cold and warm, and the blowing direction of the blower 10 is also switched to cool and warm so that the coil 13 and the dampers 14a, 1 are switched.
5 may be spared.

<Effect> As described in detail above, hot air is blown from the floor surface during cooling, and cool air is blown from the ceiling surface during cooling, so even if there is a difference in temperature between the upper and lower sides, a good sensible temperature gradient is achieved, so ideal air conditioning is possible. Has the effect of enabling.

[Brief description of drawings]

FIG. 1 is a side view showing an embodiment of the present invention during cooling, FIG. 2 is a side view showing its heating, and FIG. 3 is an explanatory view illustrating a temperature gradient by a conventional air conditioner. 1 …… Fan coil unit 2 …… Floor slab 3 …… Free access floor 4 …… Underfloor chamber 5 …… Suction port 6 …… Ceiling chamber, 7 …… Ceiling outlet 8 …… Ceiling, 9 …… Floor panel 10 ... Blower, 11 ... Filter 12 ... Cold water coil, 13 ... Hot water coil 14 ... Upper switching damper 15 ... Lower switching damper

Claims (1)

[Scope of utility model registration request] 1. An underfloor chamber communicating with a floor outlet,
A ceiling chamber communicating with the ceiling outlet, and a reversible blower and a heat exchange coil arranged in series in the axial direction of the communication passage in a communication passage connecting the underfloor chamber and the ceiling chamber. Air-conditioning switching air conditioner.