JP2005291617A - Ventilation type heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation type heat exchanger capable of suppressing an air conditioning load at all times according to the temperature and humidity conditions of the outside air and the inside air. <P>SOLUTION: This ventilation type heat exchanger capable of indirectly exchanging the inside air and the outside air with each other through a heat exchange element 10 comprises a heat exchange element group 1 formed of a plurality of heat exchange elements 10 with different latent or sensible heat exchange efficiencies thereof and an element switching means 2 switching at least one of the heat exchange elements 10 selected from the heat exchange element group 1 so as to form an indirect exchange flow passage for the outside air and the inside air. Also, the heat exchange element group 1 may comprise at least the sensible heat exchange element 11 mainly performing sensible heat exchange and the latent heat exchange element 12 mainly performing latent heat exchange. <P>COPYRIGHT: (C)2006,JPO&amp;NCIPI

Description

  The present invention relates to a ventilated heat exchanger that performs sensible heat or latent heat exchange.

  A ventilated heat exchanger equipped with a heat exchange element is mainly composed of an inflow path and an outflow path for fresh air that is fresh air and an inflow path and an outflow path for inside air that is contaminated air, with the heat exchange element as the center. Have. Two types of air consisting of outside air and inside air are exchanged by a heat exchange element while performing first type ventilation, thereby suppressing an air conditioning load related to temperature and humidity. This heat exchange element is formed by laminating a plurality of heat exchange membranes at predetermined intervals. By alternately circulating outside air and inside air at each lamination interval, outside air and inside air are passed through the heat exchange membrane. To exchange the total heat of the outside air and the inside air (that is, sensible heat and latent heat).

  With regard to this ventilation heat exchanger, there has conventionally been one in which a bypass path for bypassing the heat exchange element is provided in each of the inflow path and the outflow path of the outside air and the inside air. (For example, refer to Patent Document 1). By switching the two types of ventilation air to the bypass path, ventilation is performed without alternating current with the heat exchange element. Thereby, for example, when the temperature of the outside air is lower than the room temperature during cooling, the air conditioning load can be suppressed as compared with the case where the heat exchange element is used for AC.

However, in the conventional ventilation heat exchanger, only one type of heat exchange can be switched on / off in the ventilation operation. For this reason, depending on the temperature and humidity conditions of the outside air and the inside air, the air conditioning load may not be efficiently suppressed.
JP-A-5-322254

  Then, this invention makes it a subject to provide the ventilation type heat exchanger which can always suppress an air-conditioning load according to the temperature and humidity conditions of outside air and inside air.

  In order to solve the above problems, the following means (1) to (6) are adopted in the present invention.

  (1) That is, the ventilated heat exchanger according to the present invention is a ventilated heat exchanger that can indirectly exchange the inside air and the outside air via the heat exchange element 10, and it (the heat exchange element 10) itself. A heat exchange element group 1 composed of a plurality of heat exchange elements 10 having different latent heat exchange efficiency or sensible heat exchange efficiency, and at least one of the heat exchange elements 10 selected from the heat exchange element group 1 is indirect of outside air and inside air. And an element switching means for switching so as to be an AC path.

  If it is such, the element switching means 2 can select any one or a plurality of heat exchange elements 10 to be an indirect AC path so as to have an arbitrary latent heat exchange efficiency or sensible heat exchange efficiency. . Thereby, it becomes possible to perform heat exchange of a plurality of patterns having different sensible heat exchange efficiency and latent heat exchange (humidity adjustment) efficiency, and the air conditioning load of the air conditioner used in combination can be efficiently reduced.

  Here, the outside air and the inside air refer to air from outside and inside the room, respectively.

  In addition, indirect alternating current (and indirect alternating current path) in the present invention means that two types of air in different flow paths exchange with each other only through the heat exchange film of the heat exchange element without allowing each other to flow (and Thus, it refers to a channel that indirectly exchanges in this way.

  Since the heat exchange membrane constituting the main part of the heat exchange element is poor in air permeability, the two types of air blocked by the heat exchange membrane pass through the respective flow paths without passing through each other. Therefore, the two types of air do not directly exchange with each other, but indirectly exchange with each other through the heat exchange membrane. By indirectly alternating current, heat exchange can be performed without ventilation.

  (2) The heat exchange element group 1 may include at least a sensible heat exchange element 11 that mainly performs sensible heat exchange and a latent heat exchange element 12 that mainly performs latent heat exchange. At this time, the element switching means 2 switches one or both of the sensible heat exchange element 11 and the latent heat exchange element 12 to a state where two air indirect AC paths are used, or both are indirect AC paths. You can switch to a state that does not.

  In such a case, it is possible to select whether only the sensible heat exchange, the latent heat exchange only, or both the sensible heat and latent heat exchange is performed. It is possible to easily meet detailed air conditioning management requirements regarding heat exchange.

  Here, “mainly performing sensible heat exchange” for the sensible heat exchange element 11 means that the latent heat exchange efficiency (latent heat exchange efficiency) is poor and the sensible heat exchange efficiency (sensible heat exchange efficiency) is greater than or equal to an effective value. . Further, “latent heat exchange is mainly performed” for the latent heat exchange element 12 means that the sensible heat exchange efficiency (sensible heat exchange efficiency) is poor and the latent heat exchange efficiency (latent heat exchange efficiency) is a predetermined value or more).

  (3) The device further includes an element bypassing means 3 capable of switching each flow path so that the flow paths of the outside air and the internal air bypass the heat exchange element group 1 without indirect alternating current. The switching means 2 may switch so that only one heat exchange element 10 selected from the heat exchange element group 1 is used as an indirect AC path of outside air and inside air.

  If it is such, it can also be set as the state which performs only 1st type ventilation, without performing heat exchange of external air and internal air by an element detour means. Such a state is preferably selected when, for example, the outside air temperature is lower than the room temperature. It is possible to reduce the power of each air conditioner while ventilating, and to save energy in air conditioning management.

  Further, with such an element switching means 2, it is possible to easily switch the heat exchange element 10 while keeping the ventilation air flow constant.

  (4) The latent heat exchange element 12 of (2) includes a foamed plastic heat insulating material 121 provided with a plurality of moisture permeable holes 121h in the thickness direction, and a hydrophilic organic material provided so as to cover the moisture permeable holes 121h. It is preferable to have a latent heat exchange membrane 12F composed of the polymer membrane 122 and perform latent heat exchange with this latent heat exchange membrane 12F.

  If it is such, it will become a latent heat exchange film | membrane excellent in the latent heat exchange efficiency.

  (5) Alternatively, the ventilated heat exchanger of the present invention can indirectly exchange the outside air and the inside air via the heat exchange element 10, and the ventilation exhaust path Ev for exhausting the inside air (outside the room). And the ventilation intake path Sv for supplying outside air (into the room) to the heat exchange element 10 by the exchange air flow path v formed by indirect alternating current through the heat exchange element 10, the inside air circulation path Ic, and the outside air circulation path Oc. It is characterized by comprising a flow path switching means 4 which can switch between the circulation air flow path c formed by indirect alternating current.

  If it is such, it can be set as the state which only performs heat exchange, without ventilating by setting it as a circulatory flow path by a flow-path switching means.

  (6) It is preferable that the flow path switching means 4 is configured to switch the discharge destinations of the outside air and the inside air that have passed through the heat exchange element 10 to each selected among the indoor and the outdoor.

  In such a case, since only the discharge destination after the outside air and the inside air are indirectly exchanged is switched, the pressure loss of the heat exchange flow path is hardly changed even by the switching operation of the flow path switching means. The element can exhibit stable heat exchange efficiency.

  Since the present invention is configured as described above, it is possible to easily obtain a ventilated heat exchanger that can always suppress the air conditioning load according to the temperature and humidity conditions of the outside air and the inside air.

  The best mode for carrying out the present invention will be described below with reference to the drawings (FIGS. 1 to 8) shown as embodiments. 1 and 2 are perspective explanatory views for explaining the switching states (a) to (d) by the element switching means 2, wherein (a) uses the latent heat exchange element 11 as an AC path, and (b) shows the apparent state. The heat exchange element 12 is an AC path, (c) is a state where the total heat exchange element 13 is an AC path, and (d) is a state where the non-heat exchange element 34 is an AC path.

  3 and 4 are explanatory views in plan view showing the state shown in FIG. 1 and FIG. 5 and 6 are cross-sectional explanatory views in FIGS. 1 and 2, respectively.

  1, FIG. 3 and FIG. 5 of FIG. 1 to FIG. 6 are flow path systems of an exchange air flow path v (exchange air flow channel) composed of a ventilation discharge path Ev and a ventilation intake path Sv. 2, FIG. 4 and FIG. 6 show a flow path system of a circulation air flow path c (circulation air exhaust channel) composed of an inside air circulation path Ic and an outside air circulation path Oc. Each flow path system is switched by the flow path switching means 4.

  FIG. 7 is a perspective external view showing one heat exchange element 10 among the plurality of heat exchange elements 10 constituting the heat exchange element group 2. FIG. 8 is a cross-sectional explanatory view illustrating the structure of the latent heat exchange membrane 12F of the latent heat exchange element 12 among them.

  The ventilated heat exchanger of the present invention is capable of indirect alternating current between the inside air and outside air via the heat exchange element 10. With this indirect alternating current, heat can be exchanged without allowing the inside air and the outside air to vent each other.

  The ventilated heat exchanger according to the present invention includes a heat exchange element group 1 composed of a plurality of heat exchange elements 10 and one or more heat exchange elements 10 selected from the heat exchange element group 1 for the outside air and the inside air. And an element switching means for switching so as to be an indirect AC path.

(Heat exchange element 10)
The plurality of heat exchange elements 10 have different latent heat exchange efficiencies or sensible heat exchange efficiencies. At least one of the latent heat exchange efficiency and the sensible heat exchange efficiency may be different.

  Here, the latent heat exchange efficiency is a transfer rate of water vapor in the air, and is a value calculated from the absolute humidity of indoor and outdoor air. The sensible heat exchange efficiency is a value calculated from the indoor and outdoor air temperatures.

  As a preferable aspect of the plurality of heat exchange elements 10, in the embodiment, the sensible heat exchange element 11 that mainly performs sensible heat exchange, the latent heat exchange element 12 that mainly performs latent heat exchange, and heat exchange of both sensible heat and latent heat. And a total heat exchange element 13 that performs total heat exchange in the present invention. Among these, it is only necessary to have at least the sensible heat exchange element 11 and the latent heat exchange element 12, and may have no total heat exchange element 13, or may have another heat exchange element 10.

  Each heat exchange element 10 is formed by alternately stacking heat exchange membranes 10F and spacers 10S that are fixed on the heat exchange membranes 10F and maintain the intervals between the heat exchange membranes 10F. Thereby, the plurality of heat exchange membranes 10F are arranged in parallel at equal intervals, and the spacers 10S are fixed to each layer between the heat exchange membranes 10F.

  The heat exchange membrane 10F exchanges latent heat and sensible heat of two kinds of air flowing through the front surface and the back surface thereof. Specifically, a large number of heat exchange membranes 10F are stacked, and the outside air and the inside air are circulated alternately between the heat exchange membranes. Thereby, the total heat (latent heat and sensible heat) exchange between the outside air and the inside air alternately flowing between the heat exchange membranes 10F via the heat exchange membrane 10F, or heat mainly composed of either latent heat or sensible heat. Exchange. It is preferable for the high heat exchange efficiency and the low pressure loss that the parallel arrangement interval between the heat exchange membranes 10F adjacent to each other by lamination is about 1.5 to 2.0 mm, and further about 1.7 mm.

  The spacer 10S is composed of a plurality of protrusions that are fixed in parallel so as to be parallel to each other on the heat exchange membrane. While maintaining the interval between the heat exchange membranes arranged side by side, the shape of the ventilation heat exchanger is maintained by fixing a plurality of parallel wires, and the flow direction of the ventilation air is induced. .

  In addition, the parallel fixed angle in plan view of the spacer 10S is set to a substantially constant angle in every other layer between the heat exchange films, and is set to a different fixed angle in each layer between the remaining heat exchange films. Thereby, indoor air and outdoor air are induced | guided | derived to a mutually different parallel fixed angle in each layer between heat exchange films | membranes. In plan view, room air and outdoor air intersect at a certain angle in the flow direction. The greater the crossing angle between the heat exchange airs, the higher the heat exchange efficiency. In the embodiment, the crossing angle between adjacent layers is approximately 90 degrees.

  In addition, as the spacer 10S fixed in parallel between the heat exchange films 10F of the present invention, a plurality of protrusions formed by solidifying and bonding a plurality of hot melt beads layered in the thickness direction are used.

  The hot melt bead is a line (bead) -like body formed by extracting a hot melt resin (thermomelt resin) that has been viscously melted at a melting point exceeding room temperature. This hot melt resin is a material of the spacer 10S, and is hardened or hardened at room temperature.

(Sensible heat exchange element 11)
The sensible heat exchange element 11 has poor latent heat exchange efficiency and has a sensible heat exchange efficiency of an effective value or more. Specifically, for example, it is preferable that the exchange efficiency calculated from the indoor and outdoor air temperature is at least 50% or more, preferably 60% or more, and there is no latent heat exchange at this time.

  The sensible heat exchange element 11 performs sensible heat exchange with a sensible heat exchange membrane 11F (not shown). The material of the sensible heat exchange element is preferably composed mainly of metal.

(Latent heat exchange element 12)
The latent heat exchange element 12 has a latent heat exchange efficiency (latent heat exchange efficiency) of a predetermined value or more and a sensible heat exchange efficiency (sensible heat exchange efficiency) less than an effective value. Specifically, for example, the latent heat exchange efficiency calculated from the absolute humidity of indoor and outdoor air is at least 20% or more, preferably about 60% or more, and at this time, the sensible heat exchange efficiency is at least less than about 50%, preferably Less than about 30% and small enough are suitable.

  In the embodiment, the latent heat exchange membrane 12F includes a foamed plastic heat insulating material 121 provided with a plurality of moisture permeable holes 121h in the thickness direction, a hydrophilic organic polymer membrane 122 provided so as to cover the moisture permeable holes 121h, Consists of.

  The foamed plastic heat insulating material 121 is a hard or medium-hard plastic foam having closed cells.

  A plurality of moisture permeable holes 121h are provided substantially equally in the width direction of the foamed plastic heat insulating material 121 and penetrating through the thickness direction as a moisture permeable path.

  The hydrophilic organic polymer film 122 is provided so as to cover the moisture permeable holes 121h. The material of the hydrophilic organic polymer film 122 is mainly composed of a sulfonic acid polymer. In the examples, the sulfonic acid polymer is impregnated from both the front and back surfaces of the nonwoven fabric, and only one surface of the film is coated with a thin film.

  The total heat exchange membrane 1 of Example 1 is formed by fixing a hydrophilic organic polymer membrane as a synthetic resin that performs total heat exchange. Specifically, the synthetic resin that performs total heat exchange has a structure of a hydrophilic sulfonated polymer of a terpolymer represented by the following general formula [Chemical Formula 1].

  Specifically, the hydrophilic sulfonated polymer of this terpolymer is ethylene / styrene comprising 50 to 30% by weight of ethylene as an olefin monomer and 50 to 70% by weight of styrene as an allyl vinyl monomer.・ The main component is a random copolymer. The electrolyte membrane made of the hydrophilic sulfonated polymer has high moisture permeability, high latent heat exchange efficiency, and high total heat exchange efficiency. That is, the electrolyte membrane according to the present invention has a very high moisture permeability (about 75% heat exchange efficiency) which has not been obtained in the past due to moisture diffusion in the hydrophilic ion channel of the microstructure.

  The total heat exchange element 13 includes a total heat exchange membrane 13F that simultaneously exchanges latent heat and sensible heat. The total heat exchange element 13 performs total heat exchange with a total heat exchange membrane 13F (not shown).

(Element switching means 2)
And the element switching means 2 is in the single selection state which makes the indirect alternating current path of 2 types of air ventilated in the Example only one heat exchange element 10 selected from the said heat exchange element group 1. It can be switched.

  The element switching means 2 only needs to switch at least one of the heat exchange elements 10 to be an indirect AC path of outside air and inside air. In addition, a plurality of the indirect AC paths selected from the heat exchange element group 1 may be used. It is good also as what can be switched to the multiple selection state made into the combination of the heat exchange element 10 of. In addition, it can also switch to the non-selection state which does not select one from the heat exchange element group 1 by the detour element means 3 mentioned later.

  Specifically, the element switching means 2 in the embodiment has an intake port for inside air and outside air in at least one of the plurality of heat exchange elements 10 constituting the heat exchange element group 1. An automatic damper that can be covered is provided.

  In the embodiment, the automatic damper is composed of a folded plate-like body that covers the intake ports for the inside air and the outside air. The respective intake ports for the inside air and the outside air in each heat exchange element are interlocked by changing the bending angle, and both are opened or both are closed.

  In the embodiment, the sensible heat exchange element 11, the latent heat exchange element 12, and the total heat exchange element 13 are composed of first, second, and third automatic dampers 11d, 12d, and 13d that cover the respective intake ports. The fourth automatic damper 34d (fourth automatic damper) that covers the intake port of the non-heat exchange element 34 as the element bypassing means 3 described below has the same configuration.

  The first, second, third, and fourth automatic dampers 11d, 12d, 13d, and 34d are automatically operated as shown in Table 1 by sensors.

  Hereinafter, each operation state will be described.

  The case where only the first automatic damper 11d is opened will be described in detail. In a cooling condition where ventilation is performed and a heating condition where ventilation is not performed, the inside air temperature is lower than the outside air temperature and the inside air absolute humidity is higher than the outside air absolute humidity. On the other hand, the inside air temperature is higher than the outside air temperature and the inside air absolute humidity is lower than the outside air absolute humidity under the heating condition where ventilation is performed and the cooling condition where ventilation is not performed. The first automatic damper 11d is detected by a sensor and automatically operates to be in an open state, and the second, third, and fourth automatic dampers 12d, 13d, and 34d are automatically closed. Operates to.

  The case where only the second automatic damper 12d is opened will be described in detail. In a cooling condition where ventilation is performed and a heating condition where ventilation is not performed, the inside air temperature is higher than the outside air temperature and the inside air absolute humidity is lower than the outside air absolute humidity. On the other hand, the inside air temperature is lower than the outside air temperature and the inside air absolute humidity is higher than the outside air absolute humidity under heating conditions where ventilation is performed and cooling conditions where ventilation is not performed. The second automatic damper 12d is detected by a sensor and automatically operates so as to be in an open state. At the same time, the first, third, and fourth automatic dampers 11d, 13d, and 34d are automatically closed. Operates with.

  The case where only the third automatic damper 13d is opened will be described in detail. The inside air temperature and the inside air absolute humidity are both lower than the outside air temperature and the outside air absolute humidity under the cooling condition where ventilation is performed and the heating condition where ventilation is not performed. On the other hand, the inside air temperature and the inside air absolute humidity are both higher than the outside air temperature and the outside air absolute humidity under heating conditions in which ventilation is performed and cooling conditions in which ventilation is not performed. The third automatic damper 13d is detected by the sensor and automatically operates to the open state. At the same time, the first, second, and fourth automatic dampers 11d, 12d, and 34d automatically operate to the closed state. To do.

  The case where only the fourth automatic damper 34d is opened will be described in detail. The inside air temperature and the inside air absolute humidity are both higher than the outside air temperature and the outside air absolute humidity under the cooling condition where ventilation is performed and the heating condition where ventilation is not performed. On the other hand, in a heating condition where ventilation is performed and a cooling condition where ventilation is not performed, the inside air temperature and the inside air absolute humidity are both lower than the outside air temperature and the outside air absolute humidity. The fourth automatic damper 34d is also automatically actuated so as to be opened by the sensor. At the same time, the first, second and third automatic dampers 11d, 12d and 13d are automatically closed. Operate.

(Element bypass means 3)
The element bypass means 3 is capable of switching the external air and internal air flow paths so that the external air and internal air flow paths do not indirectly exchange and bypass the heat exchange element group 1. Specifically, the heat exchange element group 1 is provided with a non-heat exchange element 34 that does not perform heat exchange. The non-heat exchange element 34 is provided with an automatic damper 34d that can cover the intake port for the inside air and the outside air.

  In addition, each of the ventilation discharge path Ev and the ventilation intake path Sv may be provided with an exhaust bypass path and an air supply bypass path that bypass the heat exchange element. In addition, both the outside air circulation path Oc and the inside air circulation path Ic may be provided with an outside air bypass circuit and an inside air bypass circuit that bypass the heat exchange element. Both the exhaust bypass route and the supply air bypass route, or both the outside air bypass route and the inside air bypass route are provided with automatic dampers that are both closed or both open.

  This automatic damper is the fourth automatic damper in the embodiment. When the temperature and absolute humidity of the outside air are both lower than the inside air under the cooling condition, or both the temperature and absolute humidity of the outside air are higher than the inside air under the heating condition. In some cases, this is triggered by the sensor detecting it.

(Flow path switching means 4)
The ventilation heat exchanger according to the present invention is configured such that a ventilation exhaust path Ev for exhausting the inside air (to the outside) and a ventilation intake path Sv for supplying the outside air (to the room) are indirectly exchanged by the heat exchange element 10. An exchange air flow path v (exchange air exhaust channel);
A flow path switching means 4 that can switch between a circulation air flow path c (circulation air exhaust channel) in which the inside air circulation path Ic and the outside air circulation path Oc are indirectly exchanged by the heat exchange element 10. It is characterized by comprising.

  The flow path switching means 4 can switch the exchange air flow path v and the circulation air flow path c to each other, and can be changed to any arbitrary flow path by switching.

  That is, the flow path switching means 4 connects the exhaust passage EA and the air supply passage SA, which are the communication destinations of the return air passage RA and the outside air passage OA, so as to exchange each other, and supplies the respective communication destinations. These are switched to the path SA and the exhaust path EA. In the embodiment, the discharge destinations of the outside air and the inside air that have passed through the heat exchange element 10 can be switched so as to be distributed to selected ones of the inside and the outside.

  Switching of the discharge destination is performed by reconnecting the discharge connection immediately after the two flow paths pass through the heat exchange element group or the non-heat exchange element. Specifically, after passing through the heat exchange element, the indoor air supply path and the outdoor exhaust path are connected to each other, or before passing through the heat exchange element, the outside air (fresh air) path and the return air path are mutually connected. Reconnect. In the embodiment, the chamber m is provided immediately after the inside air and the outside air pass through the heat exchange element 10. Each chamber m communicates with both the supply passage SA and the exhaust passage EA. At the same time, an air supply path communication damper and an exhaust path communication damper are provided in each communication path. Each communication damper links the air supply path SA to the indoor and the exhaust path EA to the outdoor by linking one open state and the other closed state.

  In the embodiment, the sensible heat exchange element 11, the latent heat exchange element 12, the total heat exchange element 13, and the non-heat exchange element 34 are each composed of an inside air chamber Im and an outside air chamber Om. . Hereinafter, the interlocking operation of each communication damper will be described in detail.

  When the air supply path communication damper ISd of the inside air chamber Im communicating with the air supply path SA is closed, the air supply path communication damper OSd of the outside air chamber Om is linked and the exhaust air path communication of the inside air chamber Im is performed. The damper IEd is opened, and the exhaust passage communication damper OEd of the outside air chamber Om is closed in conjunction with the damper IEd. At this time, the outside air passage OA and the air supply passage SA, the return air passage RA and the exhaust passage EA are respectively communicated to form an exchange air passage v (FIG. 3).

  On the other hand, when the air supply path communication damper ISd of the inside air chamber Im communicating with the air supply path SA is in the open state, the air supply path communication damper OSd of the outside air chamber Om is linked and the exhaust of the inside air chamber Im is interlocked. The road communication damper IEd is closed, and the exhaust path communication damper OEd of the outside air chamber Om is opened in conjunction with the road communication damper IEd. At this time, the return air path RA and the air supply path SA, the outside air path OA, and the exhaust path EA are communicated with each other to form a circulation air path c (FIG. 4).

  First, the exchange air flow path v (exchange air exhaust channel) will be described. The channel switching means 4 can switch to the exchange air channel v.

  The exchange air flow path v is a flow path for first-type ventilation of the outside air, that is, outdoor fresh air, and the inside air, that is, indoor contaminated air. The ventilation intake path Sv for taking outside air into the room and the ventilation exhaust path Ev for discharging inside air to the outside are indirectly exchanged by the heat exchange element. Alternatively, the element detour means 3 can be used to eliminate indirect alternating current by selection. By performing indirect alternating current with the heat exchange element, ventilation can be performed while performing heat exchange, and by not performing alternating current, ventilation can be performed without performing heat exchange.

  The ventilation intake path Sv is a flow path that takes in fresh air as outdoor air and supplies it to the room. Specifically, an outside air (fresh air) path OA that takes in outside air from the communicated outdoor room and an air supply path SA that supplies the taken outside air to the communicating room are connected with the heat exchange element 10 as a boundary.

  The ventilation discharge path Ev is a flow path for discharging contaminated air, which is room air, to the outside of the room. Specifically, the return air path RA that takes in the inside air from the communicating room and the exhaust path EA that discharges the taken inside air to the outside of the communicating room are connected with the heat exchange element 10 as a boundary.

  Next, the circulation air channel c (circulation air exhaust channel) will be described. The discharge path switching means 4 can be switched from the exchange air flow path v to the circulation flow path c by switching the connection of the two flow paths to each other at any location before or after the heat exchange membrane.

  The circulation channel c is a channel that performs only heat exchange without ventilating outdoor fresh air and indoor contaminated air, and the outdoor circuit and the indoor circuit are indirectly exchanged by a heat exchange element. Become.

  The air supply path is a flow path for supplying outdoor air into the room. An outside air (fresh air) path that takes in outside air from the communicated outdoor room and an indoor air supply path that supplies the taken outside air to the communicating room are connected via a heat exchange element.

  The exhaust path is a flow path for exhausting room air to the outside. A return air path for taking in the inside air from the communicating room and an outdoor exhaust path for discharging the taken in air to the outside of the communicating room are connected via a heat exchange element.

  The ventilated heat exchanger of the embodiment obtained in this way can always perform the first type ventilation while performing efficient heat exchange, so in any combination of temperature and humidity conditions of outside air and inside air, The air conditioning load of other air conditioners can be reduced while preventing air pollution. Furthermore, since only heat exchange can be performed without ventilation, the air conditioning load of other air conditioners can be reduced even in a state where ventilation is not necessary.

  In addition, the specific configuration of each part is not limited to the above-described embodiments, and various modifications can be made without departing from the spirit of the present invention.

  The ventilated heat exchanger of the present invention can also be used as an integrated air conditioner. It can also be used as a heat exchange air conditioning system including a duct and a jet outlet.

It is a perspective explanatory view explaining each switching state in the channel system of exchange air channel v of the present invention. It is a perspective explanatory view explaining each switching state in the channel system of circulating air channel c of the present invention. FIG. 2 is an explanatory plan view showing the state of FIG. FIG. 3 is an explanatory plan view showing the state of FIG. It is sectional view explanatory drawing which shows the state in FIG. FIG. 3 is a cross-sectional view illustrating the state in FIG. 2. 4 is a perspective external view showing one heat exchange element 10 among a plurality of heat exchange elements 10 constituting the heat exchange element group 2. FIG. FIG. 4 is a cross-sectional view illustrating the structure of a latent heat exchange membrane 12F of the latent heat exchange element 12.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heat exchange element group 10 Heat exchange element 11 Sensible heat exchange element 12 Latent heat exchange element 12F Latent heat exchange film 121 Foamed plastic heat insulating material 121h Breathable hole 122 Hydrophilic organic polymer film 2 Element switching means 3 Element detour means 4 Flow path switching Means v Ventilation channel Ev Ventilation discharge channel Sv Ventilation intake channel c Circulating air channel Ic Inside air circuit Oc Outside air circuit

Claims (6)

  A heat exchange element group comprising a plurality of heat exchange elements 10 having different latent heat exchange efficiency or sensible heat exchange efficiency, which is a ventilated heat exchanger capable of indirect alternating current between inside air and outside air via the heat exchange element 10 1 and element switching means 2 for switching at least one of the heat exchange elements 10 selected from the heat exchange element group 1 to be an indirect alternating current path between the outside air and the inside air. Exchanger.   The ventilated heat exchanger according to claim 1, wherein the heat exchange element group 1 includes at least a sensible heat exchange element 11 that mainly performs sensible heat exchange and a latent heat exchange element 12 that mainly performs latent heat exchange.   Each of the flow paths of the outside air and the inside air is not indirectly exchanged, and includes an element bypassing means 3 that can switch each flow path so as to bypass the heat exchange element group 1, and the element switching means 2 includes the heat exchange element. The ventilated heat exchanger according to claim 1 or 2, wherein only one heat exchange element 10 selected from the element group 1 is switched to be an indirect AC path of outside air and inside air.   The latent heat exchange element 12 is a latent heat exchange comprising a foamed plastic heat insulating material 121 provided with a plurality of moisture permeable holes 121h in the thickness direction and a hydrophilic organic polymer film 122 provided so as to cover the moisture permeable holes 121h. The ventilated heat exchanger according to claim 2 or 3, further comprising a membrane 12F and performing latent heat exchange with the latent heat exchange membrane 12F.   The outside air and the inside air can be indirectly exchanged via the heat exchange element 10, and a ventilation discharge path Ev for exhausting the inside air and a ventilation intake path Sv for supplying the outside air are in the heat exchange element 10. An exchange air flow path v formed by indirect alternating current and a circulation air flow path c formed by indirect alternating current exchange between the inside air circulation path Ic and the outside air circulation path Oc by the heat exchange element 10 can be switched to each other. A ventilated heat exchanger comprising a path switching means 4.   The ventilated heat exchange according to claim 5, wherein the flow path switching means 4 switches the discharge destinations of the outside air and the inside air that have passed through the heat exchange element 10 to each selected among the indoor and the outdoor. vessel.

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