JP2007040592A - Adsorber - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adsorber capable of obtaining good heat transfer characteristics by a simple structure. <P>SOLUTION: The adsorber is provided with a first internal fin member 221 holding adsorbent 223 and having a heat transfer surface for exchanging heat with the adsorbent 223, a second internal fin member 231 having a heat transfer surface for exchanging heat with a refrigerant, first and second casings 220a, 230a having a chamber of an airtight structure arranged oppositely, and distributing heat medium externally. The first internal fin member 221 is joined on an inner side of the first casing 220a through an adhesive sheet 220b, and the second internal fin member 231 is housed so as to abut on the second casing 230a. Thereby, the good heat transfer characteristics can be obtained. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to an adsorber, and is particularly effective when applied to an air conditioner.

  Conventionally, as this type of adsorber, for example, a housing in which a refrigerant is enclosed, and a first heat exchange member that is disposed on the upper side in the housing and is filled with an adsorbent that adsorbs and desorbs the refrigerant. And a heat exchanger that is a second heat exchange member that is disposed on the lower side in the housing and exchanges heat between the fluid supplied from the outside and the refrigerant is known. It has been.

  Then, the liquid phase refrigerant such as water is evaporated on the heat exchanger side in the case kept in a substantially vacuum, and the refrigeration capacity is obtained by the latent heat of evaporation, and the vapor phase refrigerant (water vapor) is adsorbed by the adsorption core. By adsorbing with an agent, evaporation is promoted and the refrigeration capacity is continuously exerted.

In addition, when the adsorption capacity of the adsorbent is saturated, the adsorbent is heated to evaporate and desorb (regenerate) the adsorbed refrigerant (water), and the desorbed gas-phase refrigerant (water vapor) is removed. It cools and condenses on the heat exchanger side and returns to the liquid phase refrigerant (see, for example, Patent Document 1).
JP 2001-82831 A

  However, according to Patent Document 1, the adsorption core and the heat exchanger are configured by a general heat exchanger including fins and tubes. In other words, heat is exchanged with the heat of adsorbent adsorption, desorption action, or refrigerant condensation and evaporation action through the heat medium and fins circulating in the tube, so each adsorption core and heat exchanger It becomes large.

  Furthermore, since the adsorbing core and the heat exchanger are accommodated in one housing for exchanging heat between the adsorbent and the refrigerant, there is a problem that the adsorber body is inevitably large. Therefore, in order to reduce the size of the adsorber, the inventors form an airtight structure with a simple shape and promote heat exchange between the adsorbent or refrigerant filled inside and the heat medium circulating outside. The application is characterized in that the adsorber is formed as described above (for example, see Japanese Patent Application No. 2005-16065).

  More specifically, the first and second housings that are formed in a box shape and are arranged to face each other to form an airtight chamber and the heat medium circulates outside, and the action of the adsorbent or the refrigerant There are first and second internal fin members having heat transfer surfaces for promoting heat exchange of heat generated in step (b).

  The adsorption core that is the first heat exchange member exchanges heat between the heat of adsorption and desorption of the adsorbent heat-exchanged by the first internal fin member and the heat medium circulating outside the first housing. The heat exchanger as the second heat exchange member is configured to exchange heat between the heat of the refrigerant condensing and evaporating heat exchanged by the second internal fin member and the heat medium circulating outside the second housing. The adsorption core and the heat exchanger are oppositely joined.

  Further, each of the first and second internal fin members is bonded to the first and second casings via a bonding material, respectively. As a result, the adsorber can be reduced in size. However, according to the subsequent studies by the inventors, the first internal fin member holding the adsorbent and the second internal fin member contacting the refrigerant have different heat transfer characteristics. Found to have. That is, it has been found that the second internal fin member that is in contact with the refrigerant does not need to use a bonding material having thermal resistance if the refrigerant is present.

  In view of the above, an object of the present invention is to provide an adsorber capable of obtaining good heat transfer characteristics with a simple configuration.

In order to achieve the above object, the technical means described in claims 1 to 6 are employed. That is, in the invention according to claim 1, in the adsorber in which the refrigerant and the adsorbent (223) that adsorbs the vapor of the refrigerant are accommodated in the sealed containers (220a, 230a),
A first member having a heat transfer surface for holding the adsorbent (223) and exchanging heat with the adsorbent (223) while being bonded to the upper side of the sealed container (220a, 230a) via the bonding member (220b). It is characterized by comprising an internal fin member (221) and a second internal fin member (231) that contacts the lower side of the sealed container (220a, 230a) and has a heat transfer surface for exchanging heat with the refrigerant. Yes.

  According to this invention, the heat generated by the adsorption / desorption action of the adsorbent (223) can be transferred to the sealed containers (220a, 230a) via the joining member (220b). On the other hand, the heat generated by the condensation / evaporation action of the refrigerant can be transferred to the sealed containers (220a, 230a) without using a joining member if the refrigerant is interposed in the second internal fin member (231). .

  Therefore, since the second internal fin member (231) does not have to be joined to the sealed container (220a, 230a) via the joining member, the amount of the joining member (230b) used is reduced by half, thereby reducing the manufacturing cost. Can be planned.

  In the invention according to claim 2, the closed containers (220a, 230a) are box-shaped and are arranged to face each other to form an airtight chamber between them, and a heat medium is provided outside. It is characterized by comprising first and second casings (220a, 230a) that circulate. Specifically, according to the present invention, good heat transfer characteristics can be obtained by forming the sealed containers (220a, 230a) in a simple shape.

  In the invention described in claim 3, the first internal fin member (221) is formed in a corrugated shape, and at least a bent portion joined to the first housing (220a) is formed in a flat shape. It is characterized by.

  According to this invention, the adsorption | suction performance of adsorption agent (223) improves because the heat-transfer area of a junction part increases. That is, if the planar bent portion is formed in a shape having a predetermined length, the adsorber (200) can be downsized. Moreover, the adsorption performance of the adsorbent 223 can be improved by increasing the heat transfer area by setting the length of the bent portion formed in a planar shape to a predetermined length.

  In the invention according to claim 4, the second internal fin member (231) is formed in a corrugated shape, and at least a bent portion that contacts the second housing (230a) is formed in a curved shape. It is a feature.

  According to the present invention, in the molding process in which the curved portion forms the corrugated fin rather than the bent portion is formed in a flat shape, the curved portion can be formed with a simple roller mold.

  In the fifth aspect of the present invention, the second internal fin member (231) is formed in a corrugated shape, and at least a bent portion that comes into contact with the second housing (230a) is formed in a flat shape. It is a feature.

  According to this invention, the heat transfer area in contact with the second casing (230a) increases, so that the evaporation and condensation performance of the refrigerant can be slightly improved compared to the curved portion.

  In the invention according to claim 6, the variation tolerance of the fin height of the second internal fin member (231) is h, the maximum inclination angle of the adsorber (200) is θ, and the longitudinal direction of the second casing (230a) is When the length is L, the area of the second housing (230a) is s, and the total amount of adsorbed refrigerant is Q, the minimum amount Q1 of refrigerant in the adsorber (200) is Q1 = s × (L × tan θ + h) + Q It is characterized by being.

  According to this invention, the refrigerant | coolant more than the minimum enclosure amount Q1 is enclosed in an airtight container (220a, 230a). For this reason, even if the adsorbent (223) adsorbs the total adsorbed refrigerant amount Q, the refrigerant remains on the bottom surface of the sealed container (220a, 230a). Moreover, the amount of the refrigerant is set to an amount capable of obtaining good heat transfer characteristics even when the bottom surface of the adsorber (200) is inclined.

  As a result, good heat transfer characteristics can be obtained without joining the second internal fin member (231) with the joining member.

  In addition, the code | symbol in the bracket | parenthesis of each said means shows a corresponding relationship with the specific means of embodiment mentioned later.

(First embodiment)
Hereinafter, an adsorber that can be used in the adsorption refrigerator according to the first embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a schematic diagram showing an overall configuration of an adsorption refrigeration machine in which the adsorption machine is applied to an adsorption chiller for a vehicle air conditioner. FIG. 2 is a schematic diagram showing the overall configuration of the adsorber 200. FIG. 3 is an exploded perspective view showing the overall configuration of the adsorber 200.

  As shown in FIG. 1, the adsorption refrigerator of the present embodiment is a water-cooled engine (water-cooled internal combustion engine) 100 for running a vehicle. Reference numeral 200 denotes an adsorber according to the present embodiment. Two adsorbers are provided, and when one performs an adsorption action, the other performs a desorption action.

  And when adsorption | suction action is complete | finished, one side performs desorption action and the other performs adsorption | suction action. Reference numeral 400 denotes an air conditioning case that forms a passage for air blown into the room. A centrifugal blower (hereinafter referred to as a blower) 410 that circulates air in the air conditioning case 400 is provided on the upstream side of the air flow of the air conditioning case 400.

  Reference numeral 420 denotes an indoor heat exchanger that cools the air flowing through the air conditioning case 400. This indoor heat exchanger obtains refrigeration capacity from the adsorber 200 via a heat medium. In the present embodiment, a fluid in which ethylene glycol antifreeze is mixed with water (the same as the cooling water of the engine 100) is used as the heat medium.

  Reference numeral 500 denotes an outdoor heat exchanger that exchanges heat between the heat medium flowing out of the adsorber 200 and outdoor air and cools the heat medium. 510 and 520 are switching valves for switching the circulation path of the heat medium. The operation of these switching valves 510 and 520, a pump (not shown) for circulating the heat medium, and the blower 410 are controlled by an electronic control device (not shown).

Here, as shown in FIG. 1 to FIG. 3, the adsorber 200 includes a first heat exchange member 220, a second heat exchange member 230, a partition member 240, a heat insulation strength member 245, a first circulating water casing 250, and a first heat exchange member 250. It is composed of two circulating water casings 260.

  The first heat exchange member 220 is filled with an adsorbent 223 to form an adsorption / desorption layer. The first casing 220a, which is a sealed container, a first internal fin member 221, and an adsorbent 223 are included. The first housing 220a is a box-shaped housing that forms an airtight chamber by facing and joining a second housing 230a, which is a sealed container described later.

  The first internal fin member 221 is a fin having a heat transfer surface for promoting heat exchange of heat generated by the adsorption / desorption action of the adsorbent 223. Specifically, as shown in FIGS. 2 to 4, the adsorbent 223 is held between adjacent corrugated heat transfer surfaces having a louver shape.

  And the bending part used as the return surface of a heat-transfer surface is formed in planar shape. Then, one end side (here, the upper end side) of the bent portion is joined to the inside of the first casing 220a, and heat generated by the adsorption and desorption action of the adsorbent 223 is transferred to the first casing 220a. It is configured to do. The optimum length L1 of the bent portion on the upper end side formed in a planar shape will be described later.

  By the way, the 1st internal fin member 221 of this embodiment is formed with several corrugated members 221c-221g as shown in FIG. 3, and the water vapor path which is a steam path between the several corrugated members 221c-221g The first housing 220a is arranged in parallel so as to be partitioned by 220c.

  The water vapor passage 220c is a space formed between adjacent corrugated members 221c to 221g and has a groove shape. That is, water vapor can flow in the packed layer thickness direction of the adsorbent 223 filled between adjacent heat transfer surfaces.

  Further, reference numeral 221a shown in FIG. 3 is a louver formed by cutting and raising a plane. The louver 221 a is formed so that the cut length of the louver 221 a is 70% or more of the fin height, and the cut-and-raised angle is larger than the maximum particle size of the adsorbent 223.

  According to this, when the predetermined amount of adsorbent (for example, silica gel) 223 is filled in the first internal fin member 221 after the first internal fin member 221 is joined to the first housing 220a, a closed space is formed. The adsorbent 223 can be filled on the heat transfer surface side.

  Next, the second heat exchange member 230 condenses and condenses a refrigerant inside to form an evaporation surface layer. The second housing 230a and the second internal fin member 231 are included. The second housing 220a has a box shape and is a housing that forms an airtight structure by facing and joining the first housing 220a.

  The second internal fin member 231 is a fin having a heat transfer surface for promoting heat exchange of heat generated by the condensation and evaporation of the refrigerant. Specifically, it is formed in a corrugated shape with a louver, and the refrigerant is brought into contact with the wavy heat transfer surface. And the bending part used as the return surface of a heat-transfer surface is formed in the curved surface form. Then, one end side (here, the lower end side) of the bent portion is accommodated so as to contact the inside of the second casing 230a, and heat generated by the condensation and evaporation of the refrigerant is transferred to the second casing 230a. It is configured to do.

  As shown in FIG. 3, the second internal fin member 231 uses a single corrugated member without being divided into a plurality of corrugated members. In addition, reference numeral 231a shown in FIG. 3 is a louver formed by cutting and raising a plane. This is for sealing the coolant on the heat transfer surface side that becomes a closed space when a predetermined amount of coolant is sealed after the second internal fin member 231 is joined to the second housing 230a.

  By the way, a flat outer peripheral edge (not shown) is formed on the outer periphery of each of the first and second casings 220a, and the outer peripheral edges are overlapped so that the first and second casings 220a face each other. The first and second housings 220a are coupled so as to maintain a substantially vacuum state.

  Next, the partition member 240 is provided between the first heat exchange member 220 and the second heat exchange member 230. This partition member 240 is a partition plate formed in a mesh shape made of a metal material having a low thermal conductivity (in this embodiment, a stainless steel material). And the water splash which generate | occur | produces when the refrigerant | coolant enclosed inside the 2nd heat exchange member 230 evaporates does not hit the upper adsorbent 223 directly.

  The heat insulating strength member 245 disposed above the partition member 240 is made of an inorganic ceramic material or glass material having a low thermal conductivity. And it is the intensity | strength holding member which the hole or space | gap through which water vapor | steam distribute | circulates in the thickness direction formed. The first heat exchanging member 220 and the second heat exchanging member 230 are arranged to be opposed to each other, thereby serving to both block heat transfer inside and prevent deformation of the hermetic structure that is in a vacuum state.

  The first circulating water casing 250 and the second circulating water casing 260 are water jackets formed so as to cover the outside of the first heat exchange member 220 or the second heat exchange member 230, respectively. The first circulating water casing 250 covers the outside on the first heat exchange member 220 side, and the second circulating water casing 260 covers the outside on the second heat exchange member 220 side.

  In addition, a circulating water passage through which the heat medium A circulates is formed inside the first circulating water housing 250, and a circulating water passage through which the heat medium B circulates is formed inside the second circulating water housing 250. Here, the first and second casings 220a and 230a, the first and second internal fin members 221 and 231 and the first and second circulating water casings 250 and 260 described above are metal materials having high thermal conductivity. (For example, a copper material or an alloy material containing copper, or aluminum or an alloy material containing aluminum).

  However, for aluminum-based materials, the enclosed refrigerant generates hydrogen gas, for example, due to the reaction between water and aluminum, so a special surface treatment (for example, a glass film) is required to prevent this. It is.

  By the way, the first heat exchanging member 220 configured as described above has a fin height (filled layer thickness) of the first internal fin member 221 based on the adsorption performance, adsorption speed, filling efficiency, and the like of the adsorbent 223 filled therein. The fin pitch, the water vapor passage 220c width, and the like are formed in an optimal shape to reduce the size of the adsorber 200.

  The first heat exchange member 220 determines the optimum shape by obtaining the heat transfer area of the second internal fin member 231 based on the heat exchange efficiency in the evaporating action and condensing action of the refrigerant sealed inside. . Here, it is necessary that the surface area of the heat transfer area be expanded to at least about 5 times the projected area (floor area) where the second internal fin member 231 contacts the second housing 230a. Incidentally, if the 2nd internal fin member 231 has a heat transfer area 5 times or more of the floor area of the 2nd housing | casing 230a, it may be the same shape as the 1st internal fin member 221.

  Here, the first heat exchanging member 220 and the second heat exchanging member 230 having the above-described configuration are each configured to be modularized by a laminated structure. This will be described with reference to FIG.

  FIG. 4 is an explanatory view showing an assembled form of the first heat exchange member 220 and the second heat exchange member 230. First, as shown in FIG. 4, the first heat exchange member 220 pre-coats an adhesive sheet 220b, which is a joining member made of a joining material, on the inside and outside of the first housing 220a. In addition, the adhesive sheet 220b is pre-coated only on the outside of the first casing 220a at a portion where the outer peripheral edge of the first circulating water casing 250 is joined.

  A plurality of corrugated members 221c to 221g are temporarily arranged inside the first casing 220a via the water vapor passage 220c, and the first circulating water casing 250 is temporarily arranged outside the first casing 220a. Put them in a furnace and join them together.

  On the other hand, the second heat exchange member 230 pre-coats the adhesive sheet 230b on the outside of the second housing 230a. At this time, the adhesive sheet 230b is pre-coated only at the portion where the outer peripheral edge of the second circulating water casing 260 is joined. Then, the second circulating water casing 260 is temporarily placed outside the second casing 230a, and is put into a high temperature furnace and integrally joined.

  Then, a predetermined amount of the adsorbent 223 is filled in the heat transfer surface of the first internal fin member 221 on the first heat exchange member 220 side. Before filling the adsorbent 223, a core or the like is placed in the water vapor passage 220c. At this time, although one surface of the heat transfer surface is a closed space, the closed space can be filled with the adsorbent 223 from the louver 221a. Then, the adsorbent 223 is baked and fixed in this state.

  Then, the second internal fin member 231 is accommodated in the second housing 230a, and the partition member 240, the heat insulating strength member 245, and the first housing 220a are stacked on the first housing 220a, the first housing 220a, The outer peripheral edges of the first and second casings 220a and 230a are joined by, for example, a low-temperature metal joint in which a joint portion such as ultrasonic joining does not reach a high temperature so that the inside of the 230a is maintained in a substantially vacuum state.

  And after the 1st heat exchange member 220 and the 2nd heat exchange member 230 couple | bond together, an airtight leak test | inspection is performed, the inside is made into a vacuum state, and a predetermined amount is injected into the 2nd heat exchange member 230 from the injection port which is not shown in figure. Enclose the refrigerant.

  Thereby, while the 1st internal fin member 221 hold | maintains the adsorption agent 223, the upper end side bending part of the 1st internal fin member 221 is joined to the inner side of the 1st housing | casing 220a via the adhesive sheet 220b. That is, the heat generated by the adsorption / desorption action of the adsorbent 223 is transferred to the first casing 220a through the upper end side bent portion and the adhesive sheet 220b.

  On the other hand, the bent portion on the lower end side of the second internal fin member 231 comes into contact with the inside of the second housing 220a and is in contact with the enclosed refrigerant. That is, in the second heat exchange member 230, heat generated by the evaporation and condensation of the refrigerant is transferred to the second casing 230a through the enclosed refrigerant.

  Here, the first internal fin member 221 is joined to the first housing 220a via the adhesive sheet 220b, and the second internal fin member 231 is accommodated in the second housing 230a. Will be described with reference to FIGS.

  FIG. 5 is a characteristic diagram showing the relationship between the method of assembling the second internal fin member 231 and the evaporation / condensation performance. FIG. 6 is the length L1 of the bent portion of the first internal fin member 221 and the heat transfer characteristics. 7 is a characteristic diagram showing the relationship between the length L1 of the bent portion obtained in FIG. 6 and the downsizing of the adsorber 200. FIG. These characteristic diagrams are characteristic diagrams obtained by experiments by the inventors.

  5A to 5C, as an assembling method, the second internal fin member 231 is joined to the second casing 230a through the adhesive sheet 230b in the same manner as the first internal fin member 221. The relationship between the evaporation performance and the condensation performance between the method (adhesion) and the method (adhesion-less) in which the second internal fin member 231 is accommodated in the second housing 230a as in the present embodiment without using the adhesive sheet 230b. Are comparing.

  More specifically, FIG. 5A shows the relationship between the assembling method and the evaporation performance, and exhibits the same evaporation performance for both adhesion and adhesion-free. FIG. 5B shows the relationship between the assembling method and the condensation performance when the refrigerant (water) is not sealed in the second housing 230a, and the performance without adhesion is inferior to the adhesion. ing. FIG. 5C shows the relationship between the assembling method and the condensation performance when the refrigerant (water) is sealed in the second casing 230a. is doing.

  This is because the refrigerant (water) is present at the interface between the second internal fin member 231 and the second housing 230a, and the refrigerant (water) having a higher thermal conductivity than the adhesive sheet 230b is present, and thus the adhesive is less. However, the performance is not degraded.

  Therefore, it has been found that if the refrigerant (water) is present in the second internal fin member 231, the same performance as that of adhesion can be obtained even if the evaporation and condensation performance is adhesion-free. As a result, the second internal fin member 231 of the present embodiment is an assembly method (adhesion-less) that is accommodated in the second housing 230a.

  However, in the case of this assembling method (adhesion-less), since the performance equivalent to the adhesion cannot be exhibited unless the refrigerant (water) is always present in the second internal fin member 231, the inventors have made the refrigerant. It was also found that the minimum amount Q1 was present. That is, it has been found that an enclosing amount that allows the refrigerant to intervene below the second internal fin member 231 is required even when the main body of the adsorber 200 is inclined.

  Therefore, in the present embodiment, the fin height variation tolerance h of the second internal fin member 231, the maximum inclination angle θ of the adsorber 200, and the length of the second housing 230 a in the longitudinal direction in the second housing 230 a. L1 is calculated as Q1 = s × (L × tan θ + h) + Q, where L is an area s of the second housing 230a, the total amount of adsorbed refrigerant Q, and the minimum amount Q1 of refrigerant in consideration of the influence of the inclination of the main body of the adsorber 200. It was decided to enclose a refrigerant with a minimum amount (Q1) or more. In the present embodiment, the refrigerant is water, and the total adsorption refrigerant amount Q is the total adsorption moisture amount.

  Here, the total amount of adsorbed water Q is the amount of water adsorbed by the adsorbent 223 when the first heat exchange member 220 side has an adsorbing action. Accordingly, even when the adsorber 200 installed in a vehicle or the like is inclined (for example, the maximum inclination angle is 5 degrees), the refrigerant having the minimum enclosed amount Q1 or more is always present in the second casing 230a, so that adhesion is achieved. The same performance can be obtained.

  Next, in FIG. 6, the length L1 of the bent portion and the transmission of the first internal fin member 221 are 10 mm, the fin pitch is 2.0 mm, and the adhesive sheet 220b is λ = 0.3 W / m · K. It is a characteristic view which shows the relationship with the heat-passage ratio which is one of the thermal characteristics. Here, when the length L1 of the bent portion is 0.015 mm, it is an effective bonding length when the bent portion is formed in a curved shape, and the heat passage ratio at this time is set to 1, and sequentially By increasing the length L1 of the bent portion, the heat transfer area of the bent portion is expanded and the heat transmission ratio is improved.

  Therefore, if at least the optimum length L1 of the bent portion is about 0.02 mm or more, the thermal resistance is increased by bonding through the adhesive sheet 220b, but the heat transfer area is increased and the heat transmission ratio is improved. be able to.

  FIG. 7 is a characteristic diagram for obtaining the size reduction rate of the adsorber 200 based on the length L1 of the bent portion obtained in FIG. If it is 035 mm, the heat passage ratio is increased by 1.1 times or more, and the size reduction rate of the adsorber 200 can be reduced by about 10%. Also here, the size reduction ratio is based on the effective bonding length when a bent portion having a bent portion length L1 of 0.015 mm is formed in a curved surface shape.

  In the present embodiment, the first sheet 220a is pre-coated with the adhesive sheet 220b and the first internal fin member 221 is joined. However, the present invention is not limited to this. A bonding material such as a brazing material having a low melting point may be clad (by rolling or the like), and the first internal fin member 221 may be bonded via the clad (by rolling or the like). According to this, the heat transfer characteristic of the joined portion is improved as compared with the adhesive sheet 220b.

  As described above, since the second internal fin member 231 does not have to be joined to the second casing 230a via the adhesive sheet 230b, the amount of the adhesive sheet 230b used can be reduced by half, thereby reducing the manufacturing cost.

  Next, the operation of the adsorption refrigerator having the above configuration will be described. First, as shown in FIG. 1, a pump (not shown) and a blower 410 are operated to circulate the heat medium and air, and the switching valves 510 and 520 are operated to operate the first adsorber 200 (hereinafter, left side). Between the first circulating water casing 250 on the side and the outdoor heat exchanger 500, the second circulating water casing 260 on the second adsorber 200 (hereinafter referred to as the right side adsorber) and the outdoor. Between the heat exchanger 500, between the engine 100 and the first circulating water casing 250 on the second adsorber 200 side, and between the second circulating water casing 260 and the indoor heat exchanger 420 on the first adsorber 200 side. Circulate the heat medium between. Hereinafter, such a state is referred to as a first state.

  At this time, since the heat medium heated by the air blown into the room circulates in the second circulating water casing 260 on the first adsorber 200 side, the liquid-phase refrigerant in the second heat exchange member 230 is evaporated. The air blown into the room is cooled by the heat medium cooled by the second heat exchange member 230 by the latent heat of vaporization during the evaporation of the liquid refrigerant.

  At the same time, the first heat exchange member 220 on the first adsorber 200 side adsorbs the vapor-phase refrigerant that has evaporated to promote evaporation. Note that the adsorbent 223 generates heat (condensation heat) when adsorbing the gas-phase refrigerant, and when the temperature of the adsorbent 223 increases, the moisture adsorption capacity decreases. A heat medium is circulated between the circulating water casing 250 and the temperature rise of the adsorbent 223 is suppressed. Hereinafter, the first adsorber 200 in such a state is referred to as an adsorber in an evaporation / adsorption state.

  On the other hand, since the cooling water of the engine 100 flows into the first circulating water casing 250 on the second adsorber 200 side, the adsorbent 223 bonded to the first heat exchange member 220 is heated and adsorbed. Release (desorb) moisture.

  At this time, since the heat medium cooled by the outdoor heat exchanger 500 is circulated through the second circulating water casing 260 on the second adsorber 200 side, the desorbed vapor phase refrigerant (water vapor) The second heat exchange member 230 cools and condenses. Hereinafter, the second adsorber 200 in such a state is referred to as an adsorber in a condensed / desorbed state.

  Thus, in the first state, on the first adsorber 200 side, evaporation of the refrigerant and adsorption of the evaporated gas phase refrigerant are performed, while on the second adsorber 200 side, the adsorbed moisture Is removed, and the evaporated vapor-phase refrigerant is cooled and condensed.

  Accordingly, the second heat exchange member 230 on the first adsorber 200 side functions as an evaporator for evaporating the liquid refrigerant, and the second heat exchange member 230 on the second adsorber 300 side is a condenser for condensing the gas-phase refrigerant. Function as.

  Next, when the operation in the first state has elapsed for a predetermined time, as shown in FIG. 8, the switching valves 510 and 520 are operated to exchange heat with the first circulating water casing 250 on the second adsorber 200 side. Between the adsorber 500, between the second circulating water casing 260 on the first adsorber 200 side and the outdoor heat exchanger 500, between the engine 100 and the first circulating water casing 250 on the first adsorber 200 side, In addition, the heat medium is circulated between the second circulating water casing 260 on the second adsorber 200 side and the indoor heat exchanger 420. Hereinafter, such a state is referred to as a second state.

  At this time, since the heat medium heated by the air blown into the room circulates in the second circulating water casing 260 on the second adsorber 200 side, the liquid-phase refrigerant in the second heat exchange member 230 is evaporated. The air blown into the room is cooled by the heat medium cooled by the second heat exchange member 230 by the latent heat of vaporization during the evaporation of the liquid refrigerant.

  At the same time, the first heat exchange member 220 on the second adsorber 200 side adsorbs the vapor-phase refrigerant that has evaporated to prevent the pressure in the first heat exchange member 220 from increasing, and the outdoor heat exchanger A heat medium is circulated between the first circulating water casing 250 and the first circulating water casing 250 to suppress the temperature rise of the adsorbent 223.

  On the other hand, since the coolant of the engine 100 flows into the first circulating water casing 250 on the first adsorber 200 side, the adsorbent 223 bonded to the first heat exchange member 220 in the first state is heated. , The adsorbed water is released (desorbed). At this time, since the heat medium cooled by the outdoor heat exchanger 500 is circulated through the second circulating water casing 260 on the first adsorber 200 side, the desorbed gas-phase refrigerant (water vapor) The second heat exchange member 230 cools and condenses.

  Thus, in the second state, on the second adsorber 200 side, the evaporation of the refrigerant and the adsorption of the evaporated gas phase refrigerant are performed. On the other hand, on the first adsorber 200 side, the adsorbed moisture is desorbed and the evaporated vapor phase refrigerant is cooled and condensed.

  Accordingly, the second heat exchange member 230 on the second adsorber 200 side functions as an evaporator for evaporating the liquid refrigerant, and the second heat exchange member 230 on the first adsorber 200 side is a condenser for condensing the gas-phase refrigerant. Function as.

  And when predetermined time passes, it will be set as the 1st state again. In this way, the adsorption refrigerator is continuously operated while repeating the first state and the second state every predetermined time. The predetermined time is selected based on the moisture adsorption performance of the adsorbent 223 of the first heat exchange member 220.

  According to the adsorption apparatus for adsorption type refrigerators in the first embodiment described above, the adsorbent 223 is held by being bonded to the upper sides of the first and second casings 220a and 230a, which are sealed containers, via the adhesive sheet 220b. In addition, the first internal fin member 221 having a heat transfer surface for exchanging heat with the adsorbent 223 and the lower side in the first and second casings 220a and 230a are in contact with each other to exchange heat with the refrigerant. And a second internal fin member 231 having a heat transfer surface.

  According to this, the heat generated by the adsorption / desorption action of the adsorbent 223 can be transferred to the first casing 220a via the adhesive sheet 220b. On the other hand, the heat generated by the condensation / evaporation action of the refrigerant can be transferred to the second casing 230a without using an adhesive sheet if the refrigerant is interposed in the second internal fin member 231.

  Accordingly, since the second internal fin member 231 does not have to be joined to the second casing 230a via the adhesive sheet, the manufacturing cost can be reduced by reducing the amount of the adhesive sheet used by half.

  The first and second casings 220a and 230a are formed in a box shape and are arranged to face each other to form an airtight chamber between them, and a first heat medium flows outside. Second housings 220a and 230a are provided. By forming the sealed container with a simple shape, good heat transfer characteristics can be obtained.

  In addition, the first internal fin member 221 is formed in a corrugated shape, and at least the bent portion joined to the first housing 220a is formed in a planar shape, thereby increasing the heat transfer area of the joined portion. Thus, the adsorption performance of the adsorbent 223 is improved.

  That is, if the planar bent portion is formed in a shape having a predetermined length, the adsorber 200 can be downsized. Moreover, the adsorption performance of the adsorbent 223 can be improved by increasing the heat transfer area by setting the length of the bent portion formed in a planar shape to a predetermined length.

  On the other hand, the second internal fin member 231 is formed in a corrugated shape, and at least the bent portion in contact with the second housing 230a is formed in a curved shape, thereby forming the bent portion in a flat shape. In the molding process in which the curved surface forms corrugated fins, the curved surface can be formed with a simple roller mold.

  Further, the adsorber 200 is filled with a refrigerant having a minimum enclosed amount Q1 or more given by Q1 = s × (L × tan θ + h) + Q. Thereby, even if the adsorbent 223 has adsorbed the total adsorbed refrigerant amount Q, a predetermined amount or more of the refrigerant remains on the second casing 230a, that is, the bottom surface of the sealed container.

  In the present embodiment, in consideration of the fact that the bottom surface of the adsorber 200 is inclined from the horizontal state, or the adsorber 200 is inclined as the vehicle is inclined, the amount of remaining refrigerant is s × The minimum enclosed amount Q1 was set so as to be not less than (L × tan θ + h) + Q. The residual refrigerant exists in the second casing 230a and is interposed between the second inner fin member 231 and the bottom surface, so that the second inner fin member 231 is attached to the second casing 230a using an adhesive sheet. Relatively good heat transfer characteristics can be obtained without bonding.

(Second Embodiment)
In the first embodiment described above, the first internal fin member 221 is formed such that the bent portion serving as the folded surface of the heat transfer surface is planar, but not limited thereto, specifically, As shown in FIG. 9, the bent portion on the lower end side may be formed in a curved surface shape. The bent portion on the upper end side is formed in a flat shape.

(Third embodiment)
In the above embodiment, the bent portion that becomes the folded surface of the heat transfer surface of the second internal fin member 231 housed in the second housing 230a is formed in a curved surface shape. As shown in FIG. 10, the second internal fin member 231 may be formed with a flat bent portion that serves as a folded surface of the heat transfer surface.

  According to this, since the heat transfer area in contact with the second housing 230a is increased, the refrigerant evaporation and condensation performance can be slightly improved as compared with the curved portion.

(Other embodiments)
In the above embodiment, a water jacket is formed by the first circulating water casing 250 or the second circulating water casing 260 outside the first casing 220a or the second casing 230a to form the first casing 220a or the second casing 230a. 2 It is configured to exchange heat with the heat medium flowing outside the housing 230a, but it is configured to provide an external fin member having the same shape as the second internal fin member 231 in these water jackets. Also good.

  According to this, heat exchange between the heat transferred to the first casing 220a or the second casing 230a and the heat medium flowing outside the first casing 220a or the second casing 230a can be promoted.

  Further, in the above embodiment, the substantially vertically symmetrical one-end opening type housings 220a and 230a are arranged to face each other to form a sealed container, and the upper surface and the bottom surface thereof are formed as heat transfer surfaces. And a lid-like body that covers the upper surface of the box-shaped housing.

  Furthermore, you may comprise by the baseplate which forms a bottom face, and the box-shaped housing | casing with a ceiling surface arrange | positioned on it. Also in these structures, the structure which joins the 1st internal fin member 221 to the upper surface in an airtight container, and makes the 2nd internal fin member 231 contact | abut on the bottom face of an airtight container can be taken.

  Further, in the above embodiment, the single adsorber 200 is configured. However, the present invention is not limited to this, and the adsorber 200 may be configured by stacking two or more. However, when the adsorbers 200 are stacked, if the first and second circulating water casings 250 and 260 are formed of a metal material as in the above embodiment, a heat loss occurs in the overlapping portion. It is preferable to provide a heat insulating member (not shown) or a resin plate having a low thermal conductivity in the portion.

  In the above embodiment, the present invention is applied to an adsorption refrigerator for a vehicle air conditioner. However, the present invention is not limited to this and may be applied to an adsorption refrigerator for home use or business use.

It is a schematic diagram which shows the whole structure of the adsorption | suction type refrigerator in 1st Embodiment of this invention. It is a mimetic diagram showing the whole adsorption machine 200 composition in a 1st embodiment of the present invention. It is a disassembled perspective view which shows the whole structure before the assembly | attachment of the adsorption device 200 in 1st Embodiment of this invention. It is explanatory drawing explaining the assembly | attachment form of the adsorption device 200 in 1st Embodiment of this invention. (A) thru | or (c) is a characteristic view which shows the relationship between the assembly | attachment method of the 2nd internal fin member 231, and evaporation and condensation performance. It is a characteristic view which shows the relationship between the length L1 of the bending part of the 1st internal fin member 221 and the heat transfer rate ratio which is a heat transfer characteristic. It is a characteristic view which shows the relationship between the length L1 of the bending part calculated | required in FIG. It is a schematic diagram which shows the 2nd state of the adsorption | suction type refrigerator in 1st Embodiment of this invention. It is a schematic diagram which shows the whole structure of the adsorption device 200 in 2nd Embodiment of this invention. It is a schematic diagram which shows the whole structure of the adsorption device 200 in 3rd Embodiment of this invention.

Explanation of symbols

220a: first casing 220b: adhesive sheet (joining member)
221 ... first internal fin member 230a ... second housing 231 ... second internal fin member 223 ... adsorbent

Claims (6)

In the adsorber in which the refrigerant and the adsorbent (223) that adsorbs the vapor of the refrigerant are accommodated in the sealed container (220a, 230a),
A heat transfer surface for holding the adsorbent (223) and exchanging heat with the adsorbent (223) is joined to the upper side of the sealed container (220a, 230a) via a joining member (220b). A first internal fin member (221) having;
An adsorber comprising: a second internal fin member (231) that contacts a lower side in the sealed container (220a, 230a) and has a heat transfer surface for exchanging heat with the refrigerant.   The sealed containers (220a, 230a) are box-shaped and are arranged opposite to each other to form an airtight chamber between them, and a first and second housing through which a heat medium flows. Adsorber according to claim 1, characterized in that it comprises a body (220a, 230a).   The first internal fin member (221) is formed in a corrugated shape, and at least a bent portion joined to the first housing (220a) is formed in a flat shape. Alternatively, the adsorber according to claim 2.   The said 2nd internal fin member (231) is formed in a corrugated shape, and the bending part which contact | abuts at least a said 2nd housing | casing (230a) is formed in the curved surface shape, or 1 characterized by the above-mentioned. The adsorber according to claim 2.   The said 2nd internal fin member (231) is formed in a corrugated shape, and the bending part which contact | abuts at least a said 2nd housing | casing (230a) is formed in planar shape, The Claim 1 characterized by the above-mentioned. The adsorber according to claim 2.   The variation tolerance of the fin height of the second internal fin member (231) is h, the maximum inclination angle of the adsorber (200) is θ, the longitudinal length of the second housing (230a) is L, the first The minimum enclosure amount Q1 of the refrigerant in the adsorber (200) is Q1 = s × (L × tan θ + h) + Q, where s is the area of the two housings (230a) and Q is the total amount of adsorbed refrigerant. The adsorber according to any one of claims 1 to 5.

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