JPS6324226B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an air conditioning ventilation fan, and its purpose is to improve the heat exchange efficiency between the exhaust and supply air streams and to improve the durability of the heat exchange element. be.

Conventionally, as shown in FIG. 1, in an air conditioning ventilation fan, a heat exchange element 101 is fixed at the intersection of an exhaust ventilation passage and an air supply ventilation passage, and exhaust vanes 102 and supply air vanes 103 are installed.
The heat exchange element 101 is rotated by the motor 104.
was used to exchange heat. The heat exchanger plate of the heat exchange element 101 is generally made of moisture permeable paper or the like, but paper originally has a low thermal conductivity, and humidity is exchanged by passing through the paper, so the heat exchange rate is low. The temperature was not high enough, and dust in the exhaust air and air supply adhered to the surface of the paper, reducing the thermal conductivity and humidity exchange rate. For this reason, a filter 105 was installed at the exhaust air and air supply inlets of the heat exchange element 101 to remove dust, but minute particles passed through the filter 105, resulting in the reduction in heat exchange efficiency as described above. Further, the filter 105 itself becomes a resistance, which is not preferable.

The present invention solves these conventional drawbacks, and will be described below with reference to FIGS. 2 to 11.

In Figures 2 to 4, 1 is the outdoor suction port 2.
5 is a louver having an indoor suction port 6 and an indoor discharge port 7, and is fitted into the main body 1. 8 has a rotating shaft 9, a disc 10, and a fin 11, and the motor 1
This is a heat exchange element unit that is rotated and stopped and held at a predetermined position by a heat exchanger unit in which heat exchanger plates 13 made of a moisture-impermeable material with moisture-absorbing material on both sides and spacer plates 14 having moisture-absorbing properties are alternately laminated inside. It has a replacement element 15. 16a, 16b, and 16c are partition plates formed on the main body 1, and 17 is a partition plate formed on the louver 5, the ends of which are in contact with the disk 10 and fins provided on both end surfaces of the heat exchange element unit 8. ing. 18 is an exhaust vane, 19 is an exhaust casing, 20 is an air supply vane, 21 is an air supply casing, and 22 is a motor that rotates the exhaust vane 18 and the air supply vane 20.

In the above configuration, A→A' indicates an exhaust ventilation path, and indoor air enters the heat exchange element 15 provided in the heat exchange element unit 8 from the indoor side suction port 6 of the louver 5, passes through the exhaust casing 19, and then enters the motor. The air is discharged to the outside from the outdoor outlet 3 of the main body 1 by the exhaust vane 18 rotated by the air pump 22 . Also, B
→B' indicates the air supply ventilation path, in which outside air passes from the outdoor side suction port 2 of the main body 1 through the air supply casing 21, and is provided to the heat exchange element unit 8 by the air supply vane 20 rotated by the motor 22. The air enters the heated heat exchange element 15 and is supplied into the room from the indoor side discharge port 7 of the louver 5.

In this way, the indoor air flows along the exhaust ventilation path A→A', and the outside air flows along the supply air ventilation path B=B', and the heat exchange element 1 provided in the heat exchange element unit 8
5, sensible heat and latent heat (moisture) are exchanged, which will be described in detail below.

During cooling, the indoor air, which is lower in temperature and humidity than the outside air, enters the heat exchange element 15 along the exhaust ventilation path A→A' and passes through the heat exchanger plate 13 of the heat exchange element 15 to the supply air ventilation path B. Sensible heat is taken away from the outside air supplied into the room along B', and moisture is desorbed from the moisture absorption material of the heat transfer plate 13 and the spacer plate 14, becoming high temperature and high humidity and being exhausted to the outside. In this case, desorption heat (negative due to an endothermic reaction) is generated, which exchanges heat with the outside air and lowers the temperature of the high-temperature indoor air. It is effectively used as sensible heat is taken from the outside air. On the other hand, the outside air, which is hotter and more humid than the indoor air and enters the heat exchange element 15 along the supply air passage B〓B', passes through the heat exchanger plate 13 of the heat exchange element 15 to the exhaust air passage A. Sensible heat is imparted to the indoor air exhausted outdoors along →A', moisture is adsorbed by the moisture absorption material of the heat transfer plate 13 and the spacer plate 14, and the air is supplied indoors at a low temperature and low humidity. In this case, adsorption heat is generated and heat exchanges with the indoor air, raising the temperature of the cold outside air. It can be solved by applying it as heat.

Next, when the adsorption and desorption of moisture in the moisture absorbing material of the heat transfer plate 13 and the spacer plate 14 reaches near saturation, the heat exchange element unit 8 is moved to the motor 1 around the rotating shaft 9.
When the heat exchange element 15 is rotated 90 degrees and held in accordance with step 2, the outside air will pass through the layer of the heat exchange element 15 through which the indoor air passed before rotation, and the heat exchanger plate in this layer, which is kept at a low temperature and low humidity by the indoor air, 13 and the spacer plate, the sensible heat of the outside air is taken away, moisture is adsorbed, and the air is supplied into the room at a lower temperature and lower humidity than the outside air. Then, the sensible heat is accumulated in the heat exchanger plate 13 and the spacer plate, becomes saturated, and is taken away by the indoor air exhausted to the outside via the heat exchanger plate 13. In addition, heat of moisture adsorption is generated, but this is caused by the heat transfer plate 13 as described above.
is given to the exhausted indoor air through the On the other hand, indoor air will pass through the layer of the heat exchange element 15 through which the outside air has passed, and the heat exchanger plate 13 and the spacer plate 1 in this layer have become hot and humid due to the outside air.
4, sensible heat is imparted to the passing indoor air, moisture is desorbed, and the air becomes hotter and more humid than the indoor air and is exhausted outdoors. Then, the sensible heat stored in the heat exchanger plate 13 and the spacing plate 14 will be radiated soon,
Sensible heat is removed from the outside air supplied into the room via the heat transfer plate 13. In addition, desorption heat of moisture (negative due to endothermic reaction) is generated, but this is taken as sensible heat from the supplied outside air via the heat exchanger plate 13 as described above, and is effectively used. .

This operation is repeated to exchange total heat between the indoor air and the outside air, but the sensible heat is transferred to the heat transfer plate 1.
3, but also through heat storage and heat radiation. Moisture exchange is performed by adsorption and desorption between the moisture absorption material of the heat exchanger plate 13 and the spacing plate 14, and the heat of adsorption and desorption is also transferred to the heat exchanger plate 13. Since the heat exchanger can be used effectively by eliminating the problem of heat transfer through the heat transfer plate, the total heat exchange rate is considerably improved compared to the conventional method of exchanging sensible heat and moisture via a moisture-permeable heat transfer plate. do.

Incidentally, during heating, the heat exchange rate is improved by a similar effect.

In addition, even if dust adheres to the surface of the heat exchange element 15, which served as an inlet at a certain time in the exhaust ventilation passage and the supply air passage, the heat exchange element 15 rotates and serves as an exit, and the dust is blown away. In addition, by rotating the heat exchange element 15 on the heat exchange plate 13, the direction of the wind on the heat exchange plate 13 is reversed, so that even minute dust does not adhere and accumulate, and the heat exchange element 15 due to dust is prevented from accumulating. It is possible to prevent a decrease in the air volume and heat exchange rate caused by clogging of the surface and heat exchanger plate, and there is an advantage that there is no need for a filter and there is almost no need for cleaning.

Furthermore, due to the plurality of fins provided in the heat exchange element unit 8, even when the heat exchange element unit 8 rotates, outside air does not directly enter through the heat exchange element 15, and the indoor air is heated. Since the air is not exhausted outside without passing through the exchange element 15, it becomes possible to replace the air flowing through the heat exchange element 15 without changing the condition of the indoor air.

Furthermore, unless the heat exchange element 15 is rotated, moisture will not be exchanged and only sensible heat will be exchanged.
For example, in a basement where the temperature is low and humidity is high in the summer, sensible heat exchange air allows ventilation to lower the humidity while keeping the basement mostly at a low temperature, which is very effective.

FIG. 5 shows another embodiment, and the same numbers indicate the same parts as in the first embodiment. In Figure 5, 23
is a fin provided in the heat exchange element unit 24, which is raised from the surface of the heat exchange element 15 in a curved shape having an arbitrary curvature. By forming the fins 23 into such a shape, a force is applied to the heat exchange element unit 8 so that it rotates in the direction of arrow T by rotating the exhaust vanes 18 and the air supply vanes 20, and the brake ( It is possible to arbitrarily rotate or hold the heat exchange element unit 8 by operating the heat exchange element unit 8 (not shown), and a motor for rotating the heat exchange element unit 8 is not required.

6 to 7 show other embodiments, and the same numbers indicate the same parts as in the first embodiment. In the figure,
25 is an opening provided in the partition plate 26 for communicating the indoor side suction port 6 (functionally the discharge port) and the outdoor side suction port 2, and 27 is the indoor side discharge port 7 (functionally the suction port). An opening provided with a partition plate 28 for communicating with the outdoor outlet 3, 29 a damper for arbitrarily opening and closing the opening 25, and 30 a damper for arbitrarily opening and closing the opening 27. .

In the above configuration, if the motor 22 is operated with the dampers 29 and 30 open as shown in FIGS. 6 and 7, indoor air is sucked in from the indoor side discharge port 7 (functionally the suction port) of the louver 5. Rarely, arrow X→
The air is exhausted from the exhaust casing 19 to the outdoors from the outdoor outlet 3 by the exhaust vanes 18 through the opening 27 as indicated by X'. On the other hand, outside air arrow Y→
As indicated by
Air is supplied into the room from the indoor side suction port 6 (functionally, the discharge port) of the louver 5 through the louver 5 .

Therefore, the exhaust ventilation path A → A′ and the supply air ventilation path B
Since indoor air and outdoor air can be forced to be simultaneously supplied and exhausted without passing through the heat exchange element 15, which is a considerable resistance at B', the air volume inherent in the blower can be effectively used during the spring and autumn seasons. This also makes it possible to use outside air for cooling, especially before and after the cooling season.

8 to 11 show other embodiments, and the same numbers indicate the same parts as in the first and second embodiments. In the figure, 31 is a circulation opening provided in the partition plate 4, and includes an exhaust ventilation path A→A' and a supply air ventilation path B.
Connect B′. 32 is an external shutter 34 fixed parallel to the shutter rotation axis 33
and an internal shutter 35 fixed at right angles to the shutter rotation axis 33,
This is a shutter that opens and closes around a shutter rotation shaft 33. Shutter 3 as shown in Figures 8-9.
2, the outdoor side suction port 2 and the outdoor side discharge port 3 are opened to the outside air by the external shutter 34, and the circulation opening 31 is closed by the internal shutter 35. Shutter 3 as shown in Figures 10-11.
2, the outdoor side suction port 2 and the outdoor side discharge port are closed by the external shutter 34 and cut off from the outside air, and the internal shutter 35 closes the circulation opening 31.
will be released.

In the above configuration, when the shutter 32 is closed, the outdoor side suction port 2 and the outdoor side discharge port 3 are closed.
The circulation opening 31 is opened and the exhaust ventilation path A→
A' and the air supply ventilation path B〓B' are in communication, and the indoor air is sucked in from the indoor side discharge port 7 (functionally the suction port) as shown by the arrow Z→Z', and is exhausted through the opening 27. After the air is sent from the casing 19 to the circulation opening 31 by the exhaust vane 18, the air is fed into the air supply casing 2.
1 is discharged into the room from the indoor suction port 6 (functionally a discharge port) via the opening 25 by the air supply vane 20. Therefore, it has the function of a circulator, and for example, during heating, warm air accumulated near the ceiling can be blown downward, eliminating discomfort caused by uneven temperature distribution and increasing the heating effect. can be improved.

Note that in the first embodiment of the present invention, the heat exchange element 15
The heat exchanger plate 13 is made of a moisture-impermeable material with moisture absorbing material on both sides, but if it is made of a material that is moisture permeable and hygroscopic, sensible heat and moisture can be exchanged through the heat exchanger plate 13. , the heat exchange efficiency is improved compared to exchanging only sensible heat through a heat exchanger plate as in the first embodiment.
If the heat exchange element 15 is stationary as in the past, sensible heat and moisture are exchanged only through the heat exchanger plate, but according to the present invention, the heat exchange element 15 rotates and the heat exchanger plate 13 and the spacer plate 14, exchange is carried out through heat storage and radiation and adsorption and desorption of moisture, resulting in an advantage of improved efficiency.

Furthermore, if the heat transfer plate 13 and the spacing plate 14 of the heat transfer element 15 are made of moisture-impermeable and non-hygroscopic material, only sensible heat can be exchanged via the heat transfer plate 13. When the heat exchange element 15 is rotated, the heat exchange efficiency is improved due to the heat storage and heat dissipation effect of the heat transfer plate 13 and the spacer plate 14 as described above, and no moisture is exchanged, so it is not necessary to remove moisture, such as in a bathroom. This is extremely effective in cases where it is necessary to protect the bathroom from moisture damage and to recover the sensible heat released outside by exhaust to keep the bathroom warm.

As described above, according to the present invention, rotating the heat exchange element,
By adopting a structure in which the exhaust ventilation passage and the supply air ventilation passage within the heat exchange element can be interchanged, the heat exchange efficiency is improved, and at the same time, it is possible to prevent dust from accumulating on the heat exchange element, eliminating the need for a filter. This has the effect of preventing a decrease in heat exchange efficiency and air volume due to dust accumulation, and improving the durability of the heat exchange element.

[Brief explanation of the drawing]

FIG. 1 is a side sectional view of a conventional air conditioning ventilation fan, FIG. 2 is a plan sectional view of the first embodiment of the present invention, FIG. 3 is a side sectional view of the same, and FIG. 4 is a perspective view of the heat exchange element. Fifth
6 is a plan view of the third embodiment of the invention, FIG. 7 is a sectional view of the same side, and FIG. 8 is a sectional view of the fourth embodiment of the invention. Plane sectional view when the shutter is open, Figure 9 is a sectional view on the same side, Figure 10 is a sectional view of the same side.
The figure is a plan sectional view when the shutter is closed, and FIG. 11 is a side sectional view of the same. 1... Main body, 2... Outdoor side suction port, 3... Outdoor side discharge port, 4... Partition plate, 5... Louver, 6...
Indoor suction port, 7... Indoor discharge port, 8... Heat exchange element unit, 9... Rotating shaft, 10... Disc,
11...Fin, 12...Motor, 13...Heat transfer plate, 14...Spacer plate, 15...Heat exchange element, 16
...Dividing plate, 17... Partitioning plate, 18... Exhaust vane, 19... Exhaust casing, 20... Air supply vane, 21... Air supply casing, 22... Motor, 23... Fin , 24... heat exchange element unit, 25... opening, 26... division plate, 27...
Opening, 28... Partition plate, 29, 30... Damper, 31... Circulation opening, 32... Shutter,
33... Shutter rotation shaft, 34... External shutter, 35... Internal shutter.

Claims (1)

[Scope of Claims] 1. An exhaust ventilation passage that communicates with the indoor side suction port and the outdoor side discharge port and an air supply ventilation path that communicates with the indoor side discharge port and the outdoor side suction port are formed, and both the ventilation paths are separated. A heat exchange element formed by a main body having a partition wall, blades provided in the exhaust ventilation path and the supply air ventilation path, a motor for rotating the blades, and heat transfer plates arranged at predetermined intervals. A plurality of fins are provided inside the heat exchange element, and are provided with discs on both end faces in the stacking direction of the heat exchange element, and are in contact with both discs, and are raised from the surface of the heat exchange element toward the outer periphery of the disc. and a heat exchange element unit provided therein, the heat exchange element unit being rotatably and holdable at any position at the intersection of the exhaust ventilation passage and the supply air ventilation passage, and the exhaust air inside the heat exchange element being rotatable and held at any position. An air conditioning ventilation fan that allows the ventilation path and supply air path to be interchanged. 2. The air conditioning ventilation fan according to claim 1, wherein the fins provided on the heat exchange element unit are raised up from the surface of the heat exchange element in a curved shape having an arbitrary curvature. 3. The air conditioning ventilation fan according to claim 1, wherein the heat transfer plate of the heat exchange element has moisture permeability. 4. The air conditioning ventilation fan according to claim 1, wherein the heat transfer plate of the heat exchange element has no hygroscopicity and is moisture impermeable. 5. The air conditioning ventilation fan according to claim 1, wherein the heat transfer plate has a structure including a hygroscopic layer on the surface thereof.