JP3726802B2 - Embedded floor air conditioning unit - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a floor-embedded air conditioning unit.
[0002]
[Prior art]
[Patent Document 1]
As disclosed in JP-A-7-19526, a conventional air-conditioning unit that can be ventilated has a structure that cannot select an operation for circulating and cooling the entire return air without exhausting it outside. In addition, the air is supplied from the ceiling surface, the return air is taken in from the ceiling surface, and air-conditioned by indoor air circulation.
[0003]
[Problems to be solved by the invention]
For this reason, the indoor upper layer, which is a non-residential space that does not require air conditioning, is also air-conditioned. Therefore, an object of the present invention is to provide a floor-embedded air conditioning unit that can perform various patterns of operation and perform floor radiation air conditioning with little air conditioning energy loss with respect to the living space.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the floor-embedded air conditioning unit of the present invention includes an exhaust air passage provided with an exhaust fan in a casing having an exhaust port, an air supply port, a return air intake port, and an outside air intake port, An air supply passage provided with a heat exchange coil and an air supply fan, a total heat exchanger, an air supply return air passage that directly leads the return air taken in from the return air intake to the air supply air passage, An exhaust return air passage that guides return air to the exhaust air passage via the total heat exchanger, an air supply outside air passage that directly guides outside air taken in from the outside air inlet to the air supply air passage, and the outside air Through the total heat exchanger to the supply air blowing path, a total heat outside air path, the supply air return air path, the exhaust return air path, the supply air outside path, and the total heat outside air And a damper mechanism for controlling the air flow to and from the road, and the casing is installed under the floor for floor radiation air conditioning, and the supply is made under the floor. In addition to communicating with the opening, an air outlet for blowing the air supplied from the air supply opening into the room was provided in the floor or in the vicinity of the floor of the room, and the room and the return air intake were made to communicate with each other. . Furthermore, a large number of rod-shaped heat transfer bodies, which are in contact with the supply air, are suspended from the lower surface of the floor directly or via a heat storage material. Further, the heat transfer tube of the heat exchange coil is an elliptical tube.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
1 and 2 show an embodiment of a floor-embedded air conditioning unit according to the present invention. The floor-embedded air conditioning unit includes an exhaust port 3, an air supply port 5, a return air intake port 2, and outside air. In the casing 1 having the intake 4, the exhaust air passage B provided with the exhaust fan 10, the air supply air passage A provided with the heat exchange coil 6 and the air supply fan 8, the total heat exchanger 7, and the return air A return air passage 19 for supplying air directly from the intake port 2 to the supply air passage A, and a return air passage for exhaust that leads the return air to the exhaust air passage B via the total heat exchanger 7 20, an air supply external air passage 21 that directly guides the external air taken in from the external air intake 4 to the air supply air passage A, and a total heat outdoor air that guides the external air to the air supply air passage A via the total heat exchanger 7. And a damper mechanism D for controlling the air volume of the supply air return passage 19, the exhaust return air passage 20, the supply outside air passage 21, and the total heat outside air passage 22. There. A thick solid arrow and a thick dotted arrow indicate the wind direction.
[0006]
An air supply port 5 and a return air intake port 2 are formed on one of the opposed surfaces of the outer peripheral side surface of the flat box-shaped casing 1 which is thin vertically (upper and lower), and an outside air intake port 4 and an exhaust port are formed on the other of the opposed surfaces. 3 is formed. The outside air intake 4 and the return air intake 2 face each other, and the supply air return passage 19 and the exhaust return air passage 20 are provided outside the supply air supply passage A and the exhaust air supply passage B on the both intake sides. The external air path 21 for heat, the external air path 22 for total heat, and the total heat exchanger 7 are provided. The total heat exchanger 7 is a static type, and the return air for exhaust gas is used so that the return air in the exhaust return air passage 20 and the outside air in the total heat outside air passage 22 pass through each other and exchange heat with each other. It is provided so as to straddle the passage 20 and the total heat outside air passage 22. The total heat exchanger 7 is formed in a rectangular parallelepiped shape in which the outer peripheral four surfaces form a ventilation surface, and is configured so that it can be pulled out and stored, and its longitudinal direction (center axis direction) is the vertical direction. The supply air passage A and the exhaust air passage B are arranged in parallel, and a suction type air supply fan 8 is provided in the lee of the heat exchange coil 6. In addition, arrangement | positioning of the heat exchange coil 6, the air supply fan 8, the exhaust fan 10, the total heat exchanger 7, the damper mechanism D, etc. can also be made into things other than the example of a figure. Further, the humidifier 30 may be provided on the lee of the heat exchange coil 6 or may be omitted. A heat transfer medium such as cold water or hot water flows through the heat transfer tubes of the heat exchange coil 6. The heat transfer tube of the heat exchange coil 6 is preferably an elliptical tube, but may be a circular tube.
[0007]
The casing 1 is installed on a floor slab or the like under the floor for floor radiation air conditioning. The air supply port 5 is communicated with the floor, and the air supply port 5 is connected to the floor 23 or the vicinity of the floor in the room. An air outlet 12 for blowing air into the room and a suction port 27 for taking in the return air in the room are provided, and the suction port 27 is connected to the return air inlet 2 to connect the room and the return air inlet. 2 communicate. The suction port 27, the return air intake port 2, the air supply port 5, and the floor are communicated with each other through a duct, and the exhaust port 3 and the outside air intake port 4 are communicated with each other outdoors through a duct, a gargle, and the like. On the lower surface of the floor 23, a large number of rod-shaped heat transfer bodies 24 that are in contact with the supply air are suspended via a heat storage material 25 while being spaced apart from each other, and the lower ends of the heat transfer bodies 24. A pressure gap is prevented and a turbulent flow effect is obtained. The floor is double-bottomed, and a heat insulating material 26 is provided in the middle partition (bottom) to enhance the heat storage effect, and air is supplied into the upper floor below to contact the heat transfer body 24 and the heat storage material 25. The air supply is circulated from the air outlet 12 to the air inlet 27 to transmit air supply heat to the floor 23 and radiate air conditioning, thereby air-conditioning the room. A maintenance hole is formed in the partition portion between the floor 23 and the double bottom, and the maintenance hole of the floor 23 is the same member as the floor 23 and the heat storage material 25 (as shown by a solid line and a virtual line in FIG. 1). ) Configure to be openable and closable. In addition, the heat storage material 25 may be omitted and the heat transfer body 24 may be suspended directly on the lower surface of the floor 23. Further, it is possible to omit the heat transfer bodies 24... And the heat insulating material 26, and it is also free to supply air into the floor under a single floor.
[0008]
The damper mechanism D includes an air supply return air damper 15 that controls the air amount of the air supply return air passage 19, an exhaust air return damper 16 that controls the air amount of the exhaust air return passage 20, and an air supply outside air passage. The outside air damper 17 for supplying air for controlling the air volume 21 and the outside air damper for total heat 18 for controlling the air volume of the total heat outside air passage 22 are used, and the air volume is controlled by various operation control devices. Each of the dampers 15, 16, 17, and 18 may have any structure in which only the full-close / full-open switching is performed or the arbitrary air volume can be varied.
[0009]
An operation example of this air conditioning unit will be described. In the ventilation heat recovery air conditioning operation, all the dampers 15, 16, 17, 18 are opened, and the outside air from the outside air intake 4 is returned to the return air via the total heat exchanger 7. Heat is exchanged with the return air from the intake port 2, the heat exchange outside air and the return air from the return air intake port 2 are mixed at a predetermined ratio, heat is exchanged with the heat exchange coil 6, and cold air or warm air is supplied to the air supply port Supply air from 5. The return air (indoor air) recovered by exhaust heat in the total heat exchanger 7 is exhausted from the exhaust port 3 to the outside by a predetermined amount. At this time, the exhaust return air damper 16, the total heat outside air damper 18, and the supply air outside damper 17 are fully closed, and only the return air is heat-exchanged by the heat exchange coil 6, thereby returning air circulation cooling / heating operation and warming up. Can drive. In the ventilation operation and the outside air cooling operation, the flow of the heat medium to the heat exchange coil 6 is stopped, the supply air return damper 15 and the all heat outside air damper 18 are fully closed, and only the outside air is supplied indoors from the supply outside air damper 17. Then, only the return air is exhausted from the exhaust return air damper 16 to the outside. In this way, energy is saved without wastefully using the heat transfer power and the blower power.
[0010]
【The invention's effect】
In the first aspect of the invention, one air conditioning unit can perform various patterns of operation such as air-conditioning operation using only return air circulation, air-conditioning operation with ventilation / heat recovery, outdoor air-cooling operation, and ventilation operation. The outside air intake to the air supply air passage A and the outside air intake to the exhaust air air passage B can be shared by one outside air inlet 4, and the return air intake to the air supply air passage A and the return to the exhaust air passage B Since the air intake can be shared by one return air intake 2, the number of parts is reduced, and the construction can be facilitated by reducing the size and cost. In addition to the radiation air conditioning from the floor 23, the air-conditioning air is circulated only in the living space from the floor to the indoor middle layer excluding the indoor upper layer, which is a non-residential space. If the air-conditioning area is the same, it will save energy. In addition to air conditioning, it can ventilate the space under the floor. The dead space under the floor can be used effectively as the location of the air conditioner, and the beauty of the interior and exterior is not impaired.
In the invention of claim 2, since the supply air is used as a radiant heat source, there is no need for a separate device or heat source such as an electric heater or a cold / hot water pipe, and the running cost and equipment cost can be reduced. Heat exchange between the air supply and the floor portion can be efficiently performed through the heat transfer body 24 to perform floor radiant air-conditioning. Moreover, since the heat transfer body 24 is formed in a bar shape, the pressure loss is small. If the heat storage material 25 is interposed between the heat transfer body 24 and the floor 23, heat is uniformly transferred to the entire floor, floor radiation air conditioning can be performed uniformly, and the amount of radiation heat and radiation time can be adjusted.
In the invention of claim 3, since the pressure loss is reduced and the heat exchange efficiency is improved, the small fans 8 and 10 can be used, and the noise can be reduced. The heat exchange coil 6 can also be miniaturized and the air conditioning unit can be made compact.
[Brief description of the drawings]
FIG. 1 is a side view showing an embodiment of the present invention.
2 is a plan view of FIG. 1. FIG.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Casing 2 Return air inlet 3 Exhaust port 4 Outside air inlet 5 Air supply port 6 Heat exchange coil 7 Total heat exchanger 8 Supply fan 10 Exhaust fan 12 Outlet 19 Supply return air path 20 Exhaust return air path 21 External Air Path 22 for Supply Air External Air Path 23 for Total Heat 24 Floor 24 Heat Transfer Body 25 Heat Storage Material A Supply Air Blow Path B Exhaust Air Path D Damper Mechanism

Claims (3)

An exhaust air passage B provided with an exhaust fan 10, a heat exchange coil 6 and an air supply fan 8 are provided in a casing 1 having an exhaust port 3, an air supply port 5, a return air intake port 2 and an outside air intake port 4. The supply air passage A, the total heat exchanger 7, the supply air return passage 19 that directly leads the return air taken in from the return air inlet 2 to the supply air passage A, and the return air to the entire supply air An exhaust return air passage 20 that leads to the exhaust air passage B via the heat exchanger 7, an external air passage 21 that directly guides the outside air taken in from the outside air inlet 4 to the supply air passage A, and A total heat outside air passage 22 for guiding outside air to the air supply air passage A via the total heat exchanger 7, the air supply return air passage 19, the exhaust air return passage 20, and the air supply outside air passage 21 and a damper mechanism D for controlling the air volume between the total heat outside air passage 22 and the casing 1 is installed under the floor for floor radiation air conditioning. The air supply port 5 is communicated with the floor 23 of the floor, and the air outlet 12 for blowing the air supplied from the air supply port 5 into the room is provided in the floor 23 or in the vicinity of the floor of the room, A floor-embedded air conditioning unit characterized in that the room and the return air intake 2 are communicated with each other. 2. The floor-embedded air conditioning unit according to claim 1, wherein a large number of rod-like heat transfer bodies 24 that are in contact with the supply air are suspended from the lower surface of the floor 23 directly or via a heat storage material 25 with a gap therebetween. The floor-embedded air conditioning unit according to claim 1 or 2, wherein the heat transfer tube of the heat exchange coil 6 is an elliptical tube.

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