Classifications

• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
  • F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
  • F28D9/0062—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by spaced plates with inserted elements
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
  • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
  • F24F3/14—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification
  • F24F3/147—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling by humidification; by dehumidification with both heat and humidity transfer between supplied and exhausted air
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F28—HEAT EXCHANGE IN GENERAL
  • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
  • F28F2275/00—Fastening; Joining
  • F28F2275/02—Fastening; Joining by using bonding materials; by embedding elements in particular materials
  • F28F2275/025—Fastening; Joining by using bonding materials; by embedding elements in particular materials by using adhesives

Definitions

• the present invention is used for air conditioning in spaces such as buildings and automobiles, and is equipped with a heat exchange element that exchanges heat between two fluids of air supply and exhaust during ventilation, and the same It relates to a heat exchange ventilator.
• the heat exchange elements installed in the heat exchange ventilators generally used in the air conditioning field have various shapes.
• the static heat exchange elements in which the elements themselves do not operate. Basically, a partition member that contacts two fluids on the front and back surfaces to exchange heat and moisture between the two fluids (in the case of a total heat exchange ventilator), and a two-fluid flow path that flows on the front and back surfaces of the partition member
• the interval holding member that secures a large number of layers is bonded and laminated with an adhesive or a pressure-sensitive adhesive.
• Examples of the structure of such a heat exchange element include a direct current type such as Patent Document 1 and a counterflow type such as Patent Document 2.
• a fan is installed in the two-fluid path of this heat exchange element, one introduces air from the outside to the flow path of the element, and the other introduces air from the indoor living space to the other flow path of the element. Introduce to When passing through the heat exchange element, heat exchange and moisture exchange are performed by the above structure. As a result, fresh outside air introduced from the outside is introduced with its temperature and humidity brought close to the air in the living space of the room, so that ventilation can be performed without impairing the comfort of the user.
• Patent Document 1 JP 2004-190921 PR
• Patent Document 2 Japanese Patent Laid-Open No. 2004-003824
• a heat exchange ventilator that can ventilate while exchanging heat between supply and exhaust and introduce fresh air into the living space. Since the concentration of volatile organic compounds in the air in the living space can be reduced while ensuring energy saving, it is useful because the influence of the compound in question on the human body can be reduced. Disclosure of the invention
• the heat exchange element mounted on the heat exchange ventilator achieves the purpose of exchanging heat and moisture, and therefore generally has a very large contact area with the airflow flowing therethrough.
• the structure is designed to have it. Therefore, if chemical substances such as volatile organic compounds are dissipated from the constituent materials of the heat exchange element even if a small amount, the total amount of chemical substances in the air flowing into the living space after heat exchange will become large. There was a problem.
• an emulsion-type bonding agent mainly containing water is used as a bonding agent (adhesive, adhesive, etc.) used for a heat exchange element of a heat exchanger.
• a bonding agent adhesive, adhesive, etc.
• adhesives and pressure-sensitive adhesives may contain plasticizers for ensuring low-temperature film-forming properties and flexibility of the cured resin, and organic solvents that can be added to adjust the viscosity. Force These also dissipate after curing, resulting in increased chemical emissions in the heat exchanger.
• a processing device for example, an activated carbon filter, a decomposition catalyst, or discharge is used to remove and decompose chemical substances in a portion downstream of the heat exchange element and upstream of the outlet to the living space
• these treatment devices must be large-scale, and more There was a problem of requiring large space and energy consumption. It is undesirable for heat exchange ventilators intended to save energy in ventilation.
• a method is preferred in which the concentration of indoor chemical substances is reduced by introducing fresh air from outside after suppressing the release of chemical substances generated from the heat exchange ventilator as much as possible. .
• An object of the present invention has been made in response to the above problems, and proposes a heat exchange element that suppresses as much as possible the diffusion of chemical substances that are not preferably present in a space, particularly a living space of human beings or living things. And installing it in a heat exchange ventilator will reduce the amount of chemical substances emitted from the device and increase the effect of reducing the concentration of chemical substances in the space when the device is used.
• An object of the present invention is to provide a heat exchange ventilator capable of
• the heat exchange element of the present invention is a heat exchange element that performs heat exchange between two fluids flowing in a space between an air supply and an exhaust, which are partitioned by a plurality of members, and is a volatile organic compound (VOC) or a force carbonyl.
• the plurality of members are bonded by a bonding agent (adhesive, adhesive, etc.) that contains compounds but does not dissipate more than ⁇ ⁇ g / hr of these chemical substances per lg.
• the method for confirming the amount of chemicals released is to put the target bonding agent in a clean container with a cross-sectional area of 2 to 3 cm 2 and dry it (for example, dry at 100 ° C for about 5 minutes) before bonding.
• the air on the agent is sampled and collected and analyzed by the method defined in JIS A 1901 (Measurement method for the emission of volatile organic compounds (VOC), formaldehyde and other carbonyl compounds in building materials-Small chamber method).
• the emission rate of the total volatile organic compounds obtained by the operation.
• the heat exchange element of the present invention a plurality of members constituting the heat exchange element are bonded by a bonding agent in which the amount of volatile organic compound emitted is 100 xg / hr or less per lg of the bonding agent used. Therefore, the amount of chemical substance released from the bonding agent is suppressed, and as a result, the amount of chemical substance released from the heat exchange element and the heat exchange ventilator equipped with the heat exchange element can be reduced. Therefore, the effect of reducing the concentration of chemical substances in the living space can be further enhanced by ventilation using the heat exchange ventilator of the present invention.
• a volatile organic compound having a low emission amount after drying a plasticizer, and an organic solvent are not included.
• the use of materials can greatly reduce the amount of chemical substances emitted from the heat exchange element or the heat exchange ventilator equipped with it.
• FIG. 1 is a perspective view of a heat exchange element according to Embodiment 1 of the present invention.
• FIG. 2 is a perspective view of a unit component member that constitutes the heat exchange element of FIG. 1.
• FIG. 1 is a perspective view of an example of a cross flow laminated heat exchange element 1 mounted on a heat exchange ventilator according to the present invention.
• a flat partitioning member 2 and a corrugated spacing member 3 are first bonded as shown in FIG. 2 to form a unit component, and the unit component is cut into a member 2 Are further stacked in the direction in which the spacing members 3 are stacked.
• the stacking is performed while rotating 90 degrees, and as a result, two orthogonal gas channels 4 and 5 are formed by the spacing member 3.
• a bonding agent such as an adhesive or a pressure-sensitive adhesive
• Conventionally known methods can be used for the method of applying the bonding agent, the method of creating the unit constituent members, the method of laminating the heat exchange elements, and the like.
• a resin emulsion dispersion type bonding agent containing water as a main solvent is often used as the bonding agent for bonding the partition member 2 and the spacing member 3.
• a resin emulsion dispersion type bonding agent containing water as a main solvent is often used.
• a resin serving as a base for adhesion is dispersed as fine particles in water, and the finely divided resins are fused and film-formed and cured by drying the water.
• the adhesive resin penetrates into the irregularities on the surface of the member that is in contact with the adhesive resin and hardens.
• butyl acetate resin emulsion adhesive acrylic resin emulsion adhesive, butyl acetate acrylate copolymer resin emulsion adhesive, ethylene butyl acetate copolymer resin (EVA) emulsion adhesive.
• EVA ethylene butyl acetate copolymer resin
• the emulsion type that uses water as the main solvent is often used in the same way as adhesives.
• Epoxy, synthetic rubber, polyurethane, acrylic, ethylene, etc. -Adhesives such as butyl acetate copolymer (EVA) and silicone are used.
• these bonding agents may contain unintended residues of the resin as the main component.
• the residue is obtained by polymerizing the monomer to obtain a polymer.
• the residual monomer and decomposition products that remain unreacted for example, butyl acetate resin and ethylene monoacetic acid.
• the residual monomer in obtaining a bulule copolymer (EVA) resin include a butyl acetate monomer and a decomposition product such as acetic acid and acetoaldehyde).
• EVA bulule copolymer
• These are volatile organic compounds (generally defined as organic compounds having a boiling point in the range of 50 to 260 ° C. In JIS A 1901, they are in the range from n-hexane to n_hexadecane by gas chromatography. And components with lower boiling points are included.
• JI SA 1901 JI SA 1901
• phthalic acid as a plasticizer or the like is used for the purpose of promoting film formation during film-forming and curing of emulsion dispersion type adhesives or pressure-sensitive adhesives or maintaining the flexibility of the resin after curing.
• phthalates such as n-butyl (DBP) and di-2-ethylhexyl phthalate (DOP) have been introduced. Some of these have relatively high boiling points and are not classified as volatile organic compounds.
• DBP and DOP of phthalic acid compounds the Ministry of Health, Labor and Welfare has established indoor concentration standard values. The concentration in it should be reduced.
• Emulsion dispersion type adhesives with water as the main solvent may use some organic solvents such as toluene, xylene, ethylbenzene, and styrene for viscosity adjustment purposes.
• organic solvents such as toluene, xylene, ethylbenzene, and styrene
• plasticizers and organic solvents are the majority of the chemical substances released when the adhesive is dried. Therefore, it is desirable to use an adhesive that does not contain these. Since these organic solvents have a relatively low boiling point, most of them are dissipated during film-forming curing, but some remain in the resin.
• some heat exchange ventilators are used under high humidity conditions.
• the partition member 2 and the spacing member 3 are prevented from being damaged by water absorption, and long-term reliability is also ensured for the bonding agent.
• water resistance is required.
• formaldehyde is used as a crosslinking agent to crosslink molecular chains when the bonding agent is cured in order to improve water resistance in some bonding agents. There may be.
• Formaldehyde has a very low boiling point (boiling point-about 19 degrees) and is not contained in volatile organic compounds, but it is suspected as a causative agent for sick house syndrome and the Ministry of Health, Labor and Welfare, together with cetaldehyde, Guideline values are provided.
• water-based emulsion dispersion type adhesives are characterized by resins with reduced residual monomers, and exhibit the same functions as conventional adhesives without the use of chemical substances such as plasticizers.
• Adhesives and adhesives that do not use organic solvents have been developed. Major examples are found in Japanese Patent No. 3299920, Japanese Patent Application Laid-Open No. 2004-155997, Japanese Patent Application Laid-Open No. 2001-152116, Japanese Patent Application Laid-Open No. 2002-179719, and Japanese Patent Application Laid-Open No. 2003-171639. These adhesives do not contain chemicals that can be released as a major component, and therefore, there is almost no release of chemicals during and after drying.
• the bonding is performed for chemical substances such as a volatile organic compound, a plasticizer, and an organic solvent.
• chemical substances such as a volatile organic compound, a plasticizer, and an organic solvent.
• the chemical substances that exist inside the agent and dissipate, and the chemical substances that can be re-adsorbed and dissipated by the heat exchange element, are significantly reduced compared to the conventional method. Therefore, in a heat exchange ventilator that introduces such a heat exchange element, the amount of chemical substances dissipated in fresh air introduced from outside the space is further reduced. The reduction effect can be further improved over conventional products.
• many volatile organic compounds, plasticizers, and organic solvents have odors, as a secondary effect, it is expected to reduce odors from equipment during use by suppressing their emission. it can.
• the partition member 2 and the spacing member 3 are used for the partition member 2 and the spacing member 3 depending on the purpose and application of the heat exchange element 1.
• the partition member 2 is required to have moisture permeability. Therefore, the moisture permeability and stretchability are generally improved by using various resins and chemicals on paper. Specially processed paper that has been subjected to special treatment, a single resin with improved moisture permeability, and a sheet of the resin bonded and welded to a base material to supplement strength, such as nonwoven fabric, are used.
• a sensible heat exchange element since there is no such required performance, the range of materials is further expanded, and in addition to paper, a resin film or a thin metal plate (metal film) may be used.
• the paper is specially covered with resin or the like so as to reduce the stretchability, the resin film and the nonwoven fabric.
• resin A wide range of materials are used, such as those bonded and welded to base materials to supplement strength, resin molded products, metals, and metal thin films attached to paper.
• the partition member 2 and the spacing member 3 constituting the heat exchange element 1 also have a very large contact area with air, they themselves have as little chemical emission as possible. It is desirable to select and use the material. However, natural ingredients such as paper, for example, may contain some volatile organic compounds from the beginning, so it may be difficult to prepare materials that are completely free of ingredients.
• the partition member 2 and the spacing member 3 are in the form of a roll that has been scraped after being processed into a sheet shape, or in the form of a cut rectangular sheet. Since chemical substances are often volatilized and dissipated, they may end up dead or close to that condition.
• heat exchange element 1 of the present invention specially processed paper formulated with an inorganic chemical is used for the partition member 2 and the spacing member 3, and acetic acid is used instead of the plasticizer described above as a bonding agent.
• EVA ethylene-vinyl acetate polymer
• the heat exchange ventilator equipped with the heat exchange element 1 can be used by using an adhesive that joins the partition member 2 and the gap maintaining member 3 constituting the heat exchange element 1 with a dissipation amount equal to or less than this amount.
• a suitable environment can be provided to the user.
• the heat exchange element 1 as a whole including the partition member 2, the spacing member 3 and the bonding agent for bonding them, dissipates more than 100 ⁇ g / hr of volatile organic compound or carbonyl compound per lg in total. It ’s a good thing to do.
• the present invention can be applied to any type of heat exchange ventilator that employs a bonding agent for bonding constituent members, and the effect can be expected.
• the heat exchange ventilator of the present invention can be used for automobiles and trains in addition to ventilation of rooms in buildings. It can be used in various spaces such as ventilation in moving bodies such as cars.

Landscapes

• Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Physics & Mathematics (AREA)
• Thermal Sciences (AREA)
• Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
• Adhesives Or Adhesive Processes (AREA)

Priority Applications (7)

Applications Claiming Priority (1)

Publications (1)

Family

ID=37683061

Family Applications (1)

Country Status (7)

Cited By (2)

Families Citing this family (7)

Citations (9)

Family Cites Families (9)

• 2005
  • 2005-07-27 CN CNB2005800357126A patent/CN100472168C/zh not_active Expired - Fee Related
  • 2005-07-27 EP EP05767390A patent/EP1818642B1/de not_active Expired - Fee Related
  • 2005-07-27 WO PCT/JP2005/013756 patent/WO2007013153A1/ja active Application Filing
  • 2005-07-27 US US11/662,525 patent/US20080105418A1/en not_active Abandoned
  • 2005-07-27 DE DE602005019776T patent/DE602005019776D1/de active Active
  • 2005-07-27 CA CA002580575A patent/CA2580575A1/en not_active Abandoned
  • 2005-07-27 JP JP2006534501A patent/JPWO2007013153A1/ja active Pending

Patent Citations (9)

Non-Patent Citations (1)

Also Published As

Similar Documents

Legal Events