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EP-3926284-B1 - HEAT EXCHANGER

EP3926284B1EP 3926284 B1EP3926284 B1EP 3926284B1EP-3926284-B1

Inventors

  • KASAI, MASAYA
  • NAKAZAWA, Takema

Dates

Publication Date
20260513
Application Date
20200325

Claims (11)

  1. A heat exchanger, comprising: a plurality of flat sheet-like partition members (15); and spacing members (25, 55) alternately stacked with the partition members (15) to keep a space between an adjacent pair of the partition members (15), the partition members (15) each being sandwiched between a first passage (21) and a second passage (51) alternately formed, wherein the spacing members (25, 55) each have a frame portion (30, 60) formed along a periphery of the partition members (15), the frame portion (30, 60) includes a communication opening (22, 52) allowing the first passage (21) or the second passage (51) surrounded by the frame portion (30, 60) to communicate with the outside of the frame portion (30, 60), and an auxiliary rib (32, 62) extending along the communication opening (22, 52) and facing the frame portion (30, 60) of an adjacent one of the spacing members (25, 55), and the partition members (15) are each sandwiched between the auxiliary rib (32, 62) of one of a pair of the spacing members (25, 55) adjacent to the partition member (15) and the frame portion (30, 60) of the other spacing member (25, 55), characterized in that the frame portion (30, 60) of each of the spacing members (25, 55) includes an outer rib (33, 63) (i) protruding from a surface of the frame portion (30, 60) facing the auxiliary rib (32, 62) of an adjacent one of the spacing members (25, 55) and extending along an outer side of the auxiliary rib (32, 62), and a tip end face of the outer rib (33, 63) of each of the spacing members (25, 55) is flush with a surface of the auxiliary rib (32, 62) of one of the spacing members (25, 55) adjacent thereto in a protruding direction of the outer rib (33, 63), the surface being opposite to the partition member (15); or (ii) extending along an outer periphery of the spacing member (25, 55) over an entire perimeter of the spacing member (25, 55).
  2. The heat exchanger according to claim 1, wherein the frame portion (30, 60) includes a ridge (34, 64) formed on one of surfaces of the frame portion (30, 60) facing a stacking direction of the partition members (15) and extending in an extending direction of the frame portion (30, 60), and an elongated recess (35, 65) formed on the other surface of the frame portion (30, 60) and extending in the extending direction of the frame portion (30, 60), the ridge (34, 64) of one of an adjacent pair of the spacing members (25, 55) fits into the elongated recess (35, 65) of the other spacing member (25, 55), and the partition members (15) are each sandwiched between the ridge (34, 64) of one of a pair of the spacing members (25, 55) adjacent to the partition member (15) and the elongated recess (35, 65) of the other spacing member (25, 55).
  3. The heat exchanger according to claim 2, wherein the ridge (34, 64) and the elongated recess (35, 65) are formed on an outermost periphery of the frame portion (30, 60).
  4. The heat exchanger of any one of the preceding claims, wherein the auxiliary rib (32, 62) of each of the spacing members (25, 55) has a linear protrusion (36, 66) extending along the auxiliary rib (32, 62) and protruding toward a different one of the spacing members (25, 55) that the auxiliary rib (32, 62) faces, and the frame portion (30, 60) of each of the spacing members (25, 55) is provided with a linear recess (37, 67) for receiving the linear protrusion (36, 66) of an adjacent one of the spacing members (25, 55).
  5. The heat exchanger of claim 4, wherein the partition members (15) are each sandwiched between the linear protrusion (36, 66) of one of a pair of the spacing members (25, 55) adjacent to the partition member (15) and the linear recess (37, 67) of the other spacing member (25, 55).
  6. The heat exchanger of any one of the preceding claims, wherein an outer peripheral surface of a stack of the spacing members (25, 55) constitutes flat side surfaces of the heat exchanger (10).
  7. The heat exchanger of claim 1or 6, wherein the frame portion (30, 60) has an outer portion (33, 63) formed along the periphery of the frame portion (30, 60), and an inner portion (136, 166) formed along the outer portion (33, 63) and located inside the outer portion (33, 63), the partition members (15) are each sandwiched and held between the inner portion (136, 166) of the frame portion (30, 60) and one of the spacing members (25, 55) adjacent to the inner portion (136, 166), and an outer clearance (81) is formed between the outer portion (33, 63) of the frame portion (30, 60) and one of the spacing members (25, 55) adjacent to the outer portion (33, 63).
  8. The heat exchanger of claim 7, further comprising: an adhesive layer (85) provided to fill the outer clearance (81) and bonds the outer portion (33, 63) of the frame portion (30, 60) to the one of the spacing members (25, 55) adjacent to the outer portion (33, 63).
  9. The heat exchanger of claim 8, further comprising: a coating layer (86) made of the same material as the adhesive layer (85) and is formed continuously with the adhesive layer (85) to cover the outer surface of the heat exchanger (10).
  10. The heat exchanger of claim 8 or 9, wherein the adhesive layer (85) is made of an adhesive cured when exposed to ultraviolet rays, or the adhesive layer (85) contains an antibacterial component and an antifungal component.
  11. The heat exchanger of any one of claims 8 to 10, wherein the frame portion (30, 60) of each of the spacing members (25, 55) includes a positioning projection (137, 167) projecting from one of the surfaces of the frame portion (30, 60) facing the stacking direction of the partition members (15), and a positioning hole (138, 168) opening on the other surface of the frame portion (30, 60) and receiving the positioning projection (137, 167) of one of the spacing members (25, 55) adjacent to the frame portion (30, 60), and the adhesive layer (85) bonds the positioning projection (137, 167) and the surface of the frame portion (30, 60) of each of the spacing members (25, 55) provided with the positioning projection (137, 167) to a different one of the spacing members (25, 55) provided with the positioning hole (138, 168) for receiving the positioning projection (137, 167).

Description

TECHNICAL FIELD The present invention relates to a heat exchanger. BACKGROUND ART JP 2007 100997 A discloses a heat exchange element used in a ventilator. The heat exchange element is a heat exchanger that exchanges heat between supply air and exhaust air. This heat exchanger includes a plurality of resin frames and a plurality of heat transfer plates that are alternately stacked. This heat exchanger has air flow paths for the supply air and air flow paths for the exhaust air that are alternately formed in the stacking direction of the resin frames and the heat transfer plates. The heat transfer plate serves as a partition between an adjacent pair of air flow paths. This heat exchanger causes the air flowing through the air flow path for the supply air and the air flowing through the air flow path for the exhaust air to exchange sensible heat and latent heat (moisture) through the heat transfer plate. Further examples of conventional heat exchangers are derivable from US 2008/283217 A1, on which the preamble of claim 1 is based, WO 2013/157056 A1, JP 2003 314983 A, JP 2013 257106 A, WO 2018/132014 A1, JP 2008 122042 A, JP 2007 285691 A, as well as from WO 2005/078371 A2, which equally forms the basis for the two-part form of independent claim 1 of the present application. SUMMARY TECHNICAL PROBLEM In the heat exchanger of JP 2007 100997 A, each of the heat transfer plates is bonded to the resin frame with an adhesive. However, the heat transfer plate may peel off the resin frame due to poor adhesion or aging deterioration of the adhesive. The heat transfer plate, if peels off the resin frame, may block the flow of air. It is an object of the present invention to improve the reliability of a heat exchanger. SOLUTION TO THE PROBLEM This object is resolved by means of a heat exchanger according to independent claim 1. Distinct embodiments are derivable from the dependent claims. A first aspect of the present invention is directed to a heat exchanger including: a plurality of flat sheet-like partition members (15); and spacing members (25, 55) alternately stacked with the partition members (15) to keep a space between an adjacent pair of the partition members (15), the partition members (15) each being sandwiched between a first passage (21) and a second passage (51) alternately formed. The spacing members (25, 55) each have a frame portion (30, 60) formed along a periphery of the partition members (15). The frame portion (30, 60) includes a communication opening (22, 52) allowing the first passage (21) or the second passage (51) surrounded by the frame portion (30, 60) to communicate with the outside of the frame portion (30, 60), and an auxiliary rib (32, 62) extending along the communication opening (22, 52) and facing the frame portion (30, 60) of an adjacent one of the spacing members (25, 55). The partition members (15) are each sandwiched between the auxiliary rib (32, 62) of one of a pair of the spacing members (25, 55) adjacent to the partition member (15) and the frame portion (30, 60) of the other spacing member (25, 55). In the first aspect, the frame portion (30, 60) of each of the spacing members (25, 55) furthermore includes an outer rib (33, 63). The outer rib (33, 63) protrudes from a surface of the frame portion (30, 60) facing the auxiliary rib (32, 62) of an adjacent one of the spacing members (25, 55) and extending along an outer side of the auxiliary rib (32, 62). A tip end face of the outer rib (33, 63) of each of the spacing members (25, 55) is flush with a surface of the auxiliary rib (32, 62) of one of the spacing members (25, 55) adjacent thereto in a protruding direction of the outer rib (33, 63), the surface being opposite to the partition member (15). Alternatively, the outer rib (33, 63) extends along an outer periphery of the spacing member (25, 55) over an entire perimeter of the spacing member (25, 55). The heat exchanger (10) of the first aspect includes the partition members (15) and the spacing members (25, 55) that are alternately stacked, and the first passages (21) and the second passages (51) that are alternately formed. The heat exchanger (10) causes a fluid flowing through the first passage (21) and a fluid flowing through the second passage (51) to exchange at least sensible heat through the partition member (15). The partition members (15) of the heat exchanger (10) of the first aspect are each sandwiched between the auxiliary rib (32, 62) of one of an adjacent pair of the spacing members (25, 55) and the frame portion (30, 60) of the other spacing member (25, 55). Thus, each of the partition members (15) is held between a pair of the spacing members (25, 55) on both sides of the partition member (15). Further, a gap between the partition member (15) and the spacing member (25, 55) is sealed. According to the first aspect, even in the case of poor adhesion or deterioration of an adhesive, the partition member (15) can be held by the spacing members (25, 55) on both s