Heat exchanging system

Heat exchange – With adjustor for heat – or exchange material – flow – Flow reversed or crossed within temperature modifying zone

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Details

55388, 55269, 165 54, F28F 2702

Patent

active

045821291

DESCRIPTION:

BRIEF SUMMARY
FIELD OF TECHNOLOGY

This invention relates to a heat exchanging system applicable in an air conditioning ventilating device for the purpose of ventilating by heat exchange between air drawn from the outdoor air and air to be exhausted from the indoor air. More particularly, this invention relates to a heat exchanging system wherein heat transmissive partition plates are stacked in predetermined space relation to each other to form a laminated structure having laminar spaces defined between adjacent partition plates for the alternate flow of primary and secondary streams of air therethrough, the primary and secondary air streams being cyclically alternately passed through the laminar spaces.


BACKGROUND ART

Hitherto, as a plate-type heat exchanger element generally used in an air conditioning ventilating fan, a transmission-type total heat exchanging element wherein papers or the like which are permeable and moisture are used as partition plates and a sensible heat exchanging element wherein the partition plates are applied with a moisture-impermeable, heat conductive material such as metal or plastics is used. By allowing the drawn air and the exhaust air to flow simultaneously in respective predetermined directions through alternate laminar spaces each defined between the adjacent partition plates of the heat exchanging element, the total heat exchange, or the heat exchange reflecting temperature change (hereinafter referred to as "sensible heat exchange") takes place. In general, the total heat exchange efficiency is 55-60% while, in the case of the sensible heat exchanging element, the sensible heat exchange efficiency is about 65%.


SUMMARY OF THE INVENTION

This invention is intended to increase the heat exchange efficiency over that according to the prior art by allowing primary and secondary air to flow cyclically through alternate laminar spaces defined between adjacent partition plates which are the constituent elements of the heat exchanger element and which are heat transmissive and also to further increase the heat exchange efficiency by properly designing the direction of flow through each laminar space during ventilation. In addition, it is possible to provide a totally novel total heat exchanging system of high efficiency where the partition plates are impermeable to moisture and are hygroscopic .


BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a fragmental perspective view, with a portion cut away, of a heat exchanging element forming a part of the heat exchanger device in one embodiment of this invention,
FIGS. 2(a) and (b) and
FIGS. 3(a) and (b) are sectional views of partition plates,
FIGS. 4(a) to 4(d) are schematic diagrams of the embodiment for the measurement of the difference in heat exchange efficiency for different combinations of directions of flow of air streams when the air streams entering laminar spaces between the adjacent partition plates of the heat exchanging element are alternated,
FIG. 5 is a diagram showing the results of the heat exchange efficiency measurements,
FIGS. 6(a) to 6(c) are schematic diagrams showing a temperature distribution of the partition plate,
FIGS. 7 and 8 are exploded and cross-sectional views, respectively, of the total heat exchanger device in the embodiment of this invention,
FIGS. 9(a) and 9(b) and
FIGS. 10(a) and 10(b) are schematic cross-sectional views of an air conditioning ventilating fan according to different embodiments of this invention, respectively.


DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

While the details of this invention will be described in connection with the embodiments thereof, the heat exchange system providing the basis for this invention will first be described. FIG. 1 illustrates a fragmental outer appearance of a laminate-type heat exchanging element used in one embodiment of this invention, wherein reference numeral 1 represents partition plates and reference numeral 2 represents spacer plates. FIGS. 2(a) and 2(b) are sectional views of a partition plate 1 using a flame-proofed kraft paper, illustrating

REFERENCES:
patent: 2788065 (1957-04-01), Lockman
patent: 4341539 (1982-07-01), Gidaspow et al.
patent: 4391321 (1983-07-01), Thunberg
patent: 4429735 (1984-02-01), Nomaguchi et al.

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