JP2009121711A - Adsorption heat exchanger - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To improve performance by reducing flow channel resistance near an inlet/outlet of a water vapor passage 25. <P>SOLUTION: The inside of a case 3 is composed of a first area A1 having an adsorbent filling layer 22 and a second area A2 free from the adsorbent filling layer 22, the water vapor passage 25A is formed from the second area A2 toward the inside of the adsorbing filling layer 22, and an area of the water vapor passage 25A at an inlet/outlet side opened to the second area A2 is wider than an area of the passage of the inside. Thus the flow channel resistance near the inlet/outlet of the water vapor passage 25A having a high flow rate of the water vapor, can be reduced. As an adsorbed medium can smoothly enter into the inside of the water vapor passage 25A when the passage is formed into the tapered shaped without changing the inside area of each water vapor passage 25A and the total amount of the adsorbent from that of the straight shape, the performance can be improved by just that much. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to an adsorption heat exchanger in which an adsorbent performs a heat exchange action through desorption of an adsorbed medium whose phase changes between a liquid phase and a gas phase. The present invention is suitable for application to an adsorption-type refrigeration apparatus that evaporates the adsorbed medium using the adsorbing action and exhibits the refrigerating ability by the latent heat of evaporation.

In the following Patent Document 1, a heat transfer tube is arranged in a mixed powder in which copper powder and an adsorbent are mixed, and the copper powder is sintered to form a heat transfer fin. An adsorbent heat exchanger to be joined is shown. According to this, by using a sintered body of copper powder as a heat transfer fin, the contact area with the adsorbent filled in the heat transfer fin is increased and the heat transfer characteristics are improved. Heat transfer characteristics with the heat transfer tube are also improved.
JP-A-4-148194

  In order to reduce the diffusion resistance of the adsorbed medium, the inventors have provided an adsorbed medium passage inside the adsorbent packed bed so that both the heat transfer characteristics can be improved and the diffusion resistance of the adsorbed medium can be reduced. Has been devised and filed. FIG. 9 is an end view of the adsorption module 2 as a premise of the present invention, and FIG. 10 is a cross-sectional view taken along the line XX in FIG.

  As shown in FIGS. 9 and 10, the adsorption module 2 includes a plurality of hot water pipes (heat medium tubes) 21 through which a heat exchange medium (hot water in the present embodiment, and hence the following is referred to as hot water) 21 and their respective hot water. It has an adsorbent packed layer 22 formed so as to be coupled to the outer surface of the pipe 21.

  Further, in the adsorbent packed layer 22 between the hot water pipes 21, a water vapor passage (adsorbed medium passage) 25 through which a medium to be adsorbed (water vapor in the present embodiment, and hence, hereinafter referred to as water vapor) flows is formed. 11 is a partially enlarged view of FIG. 9, and FIG. 12 is a schematic cross-sectional view showing the adsorbent packed layer 22 in FIG.

  As shown in FIG. 12, the adsorbent packed bed 22 is bonded to the outer surface of each hot water pipe 21 by filling the adsorbent 24 in a powder, particulate or fibrous metal powder 23b and sintering it. It is formed. In this embodiment, a fibrous metal having excellent thermal conductivity is used as the porous sintered fin (porous heat transfer body) 23, and this fibrous metal is heated and sintered without melting. It is made into the sintered compact.

  In this embodiment, copper or copper alloy is used as the fibrous metal. The porous sintered fins 23 may be made of, for example, powder or particulate metal. Such porous fins 23 form fine pores 23a as shown in FIG. The pores 23a are fine pores suitable for filling the adsorbent 24 having a fine particle diameter.

  The adsorbent 24 is formed into a large number of fine particles, and is made of, for example, a material such as silica gel or zeolite. A large number of adsorbents 24 are filled in the pores 23 a of the porous fins 23. The porous fins 23 are sinter-bonded to the periphery of the hot water pipe 21 made of copper or a copper alloy.

  The adsorbent packed bed 22 composed of these is formed around the plurality of hot water pipes 21 so as to extend in the axial direction of the hot water pipe 21, and in this embodiment, the entire shape is cylindrical. ing. Further, as described above, the water vapor passage 25 through which water vapor flows is disposed in the adsorbent packed bed 22 between the hot water pipes 21.

  The water vapor passage 25 plays a role of promptly penetrating the inside of the adsorbent packed bed 22 around the hot water pipe 21 through water vapor from an evaporator (not shown) during adsorption. Further, at the time of desorption, the steam discharged from the adsorbent packed bed 22 around the hot water pipe 21 plays a role of promptly leading to a condenser (not shown) through the steam passage 25.

  The adsorbent packed layer 22 corresponds to the thickness L (see FIG. 12) of the porous sintered fin 23 that is sintered and bonded around the hot water pipe 21. In setting the thickness L of the porous sintered fin 23, as shown in FIGS. 11 and 12, the penetration depth r2 of water vapor toward the hot water pipe 21 and the distance from the hot water pipe 21 (hereinafter referred to as heat transfer). It is preferable to arrange the water vapor passage 25 between the hot water pipes 21 so that the distance r1 is substantially equal.

  The penetration depth r2 is the distance from the inner peripheral surface of the water vapor passage 25 to the outer peripheral surface of the hot water pipe 21. As described above, by disposing the water vapor passage 25 between the hot water pipes 21 so that the penetration depth r2 related to the adsorption and desorption speed is substantially equal to the heat transfer distance r1, the diffusion resistance of water vapor is reduced. In addition, it is possible to provide a high-performance adsorption heat exchanger that has excellent heat transfer characteristics and can reduce the time required for adsorption and desorption. This is the optimum porous sintered fin thickness L.

  However, the water vapor passage 25 of the base technology has a constant passage area from one end to the other end. (A)-(c) of FIG. 13 is a fragmentary sectional view explaining the subject of this invention. First, FIG. 13A shows the adsorbent packed bed 22 and the water vapor passage 25 of the base technology described above. In the vicinity of the passage entrance / exit where the water vapor flow rate is high, the flow resistance increases, and there is a problem that the water vapor cannot be sufficiently diffused to the inside or the water vapor desorbed inside is difficult to come out.

  FIG. 13B shows a case where the passage area of the water vapor passage 25 is increased in order to reduce the flow passage resistance in the vicinity of the passage entrance / exit. There is a problem. FIG. 13C shows a state in which a passage forming jig 40 for forming the water vapor passage 25 is inserted into the adsorbent packed bed 22 of the base technology described above. The passage forming jig 40 is pulled out after sintering, but the adsorbent-filled layer 22 and the passage-forming jig 40 are combined, and not only a large force is required for pulling out, but also the adsorbent-filled layer at the time of pulling out. There is a possibility that part of 22 may be destroyed.

  The present invention has been made paying attention to the problems existing in such a prerequisite technology, and its first object is to improve the performance by reducing the flow resistance near the entrance and exit of the water vapor passage. An object of the present invention is to provide an adsorption heat exchanger that can handle the above. Moreover, the 2nd objective is to provide the adsorption heat exchanger which can make it easy to form a water vapor path.

In order to achieve the above object, the present invention employs the following technical means. That is, in the first aspect of the invention, the casing (3) in which the heat exchange medium and the adsorbed medium circulate, and a plurality of heat medium tubes (in the casing (3)) through which the heat exchange medium circulates ( 21) and an adsorbent filling layer formed between the heat medium pipe (21) and an adsorbent packed bed (22) formed by adsorbing or desorbing a medium to be adsorbed, and the heat medium pipe (21). Adsorption heat exchange having an adsorbed medium passage (25A, 25B) formed in the layer (22) in parallel with the axial direction of the heat medium pipe (21) and supplying the adsorbed medium to the adsorbent packed bed (22). In vessel (1)
The interior of the casing (3) constitutes a first region (A1) where the adsorbent packed layer (22) is formed and a second region (A2) where the adsorbent packed layer (22) is not formed. The adsorbed medium passages (25A, 25B) are formed from the second region (A2) toward the inside of the adsorbent packed bed (22), and the adsorbed medium passages (25A, 25B) The passage area on the entrance / exit side opened in the second region (A2) is wider than the passage area on the side.

  According to the first aspect of the present invention, the flow path resistance in the vicinity of the entrance / exit of the adsorbed medium passage (25A, 25B) having a large adsorbed medium flow rate can be reduced. This is because, for example, if the passage shape is formed so that the inner area of each adsorbed medium passage (25A, 25B) and the total amount of the adsorbent are not different from the straight shape, the adsorbed medium is covered. The performance can be improved by the amount that can smoothly enter and exit the inside of the adsorption medium passage (25A, 25B).

  Similarly, in the same passage volume, the mouth-opening shape is easier to insert and remove the passage-forming jig (40) that forms the passage than the straight shape, and the passage when the passage-forming jig (40) is pulled out. Since the contact surface between the forming jig (40) and the adsorbent-filled layer (22) is changed from shear peeling to interfacial peeling, there is no possibility that a part of the adsorbent-filled layer (22) may be broken at the time of drawing. be able to.

  In the invention according to claim 2, in the adsorption heat exchanger according to claim 1, the adsorbed medium passage (25A) is formed in a taper shape from the inlet / outlet side to the inner side. . According to the second aspect of the present invention, specifically, when the adsorbed medium passage (25A) is formed in a tapered shape, the invention of the first aspect can be easily realized.

  In the invention according to claim 3, in the adsorption heat exchanger according to claim 1, the adsorbed medium passage (25B) is formed in a stepped shape from the inlet / outlet side to the inner side. Yes. According to the third aspect of the invention, specifically, the invention of the first aspect can be realized even if the adsorbed medium passage (25A) is formed in a stepped shape. However, for example, in the case of a step with a straight cylinder or the like, it is not possible to change the shear peeling to the interface peeling. Therefore, it is preferable that the step is tapered as much as possible.

  Moreover, in invention of Claim 4, in the adsorption heat exchanger of any one of Claim 1 thru | or 3, 2nd area | region (A2) exists in the both sides of an adsorbent packed bed (22), The adsorbed medium passages (25A, 25B) are formed from the second regions (A2) on both sides thereof toward the inside. According to the fourth aspect of the present invention, by providing the entrance / exit of the adsorbed medium in the second regions (A2) on both sides, adsorption of the adsorbed medium from both sides of the adsorbent packed bed (22), An efficient adsorption heat exchanger for desorption can be configured.

  In the invention according to claim 5, the adsorption heat exchanger according to claim 4 is characterized in that the adsorbed medium passages (25A, 25B) are arranged so as to face each other. Further, in the invention according to claim 6, in the adsorption heat exchanger according to claim 4, the adsorbed medium passages (25A, 25B) are alternately arranged so as to be adjacent from both sides. .

  According to the invention described in claim 5 and claim 6, the adsorbed medium passages (25A, 25B) provided from both sides of the adsorbent packed bed (22) may be arranged so as to face each other, or adjacent to each other. You may arrange | position alternately so that it may fit. In particular, when alternately arranged so as to be adjacent from both sides, the thickness of the adsorbent packed bed (22) between the adsorbed medium passages (25A, 25B) can be made substantially constant, so that the entire adsorbent packed bed (22) can be made. It can be used efficiently. In addition, the code | symbol in the parenthesis as described in a claim and said each means is an example which shows a corresponding relationship with the specific means as described in embodiment mentioned later.

(First embodiment)
Hereinafter, the adsorption heat exchanger in 1st Embodiment of this invention is demonstrated in detail using FIGS. 1-4. First, FIG. 1 is an external side view showing an adsorption heat exchanger 1A according to the first embodiment of the present invention, and FIG. 2 is a longitudinal sectional view showing an internal structure of the adsorption heat exchanger 1A of FIG. The adsorption heat exchanger 1A of the present embodiment uses an action in which an adsorbent contained therein adsorbs a gas-phase adsorbed medium (in this embodiment, water vapor, and hence, hereinafter referred to as water vapor). It utilizes the refrigeration ability by latent heat of vaporization.

  Therefore, it is suitable for use in an air conditioning apparatus for a vehicle by using it in an adsorption refrigeration apparatus or the like. Hereinafter, an adsorption heat exchanger 1A formed integrally with the adsorption module 2A inside the case (casing) 3 will be described. The adsorption heat exchanger 1A generally has a structure in which the adsorption module 2A is housed in the case body 31, the partition plates 32 and 33 are fitted on both end faces, and the tanks 34 and 35 are assembled on both end faces and integrally joined. Yes.

  The case body 31 is formed in a cylindrical shape, and the columnar suction module 2A is accommodated therein. Moreover, the opening parts at both ends of the case body 31 are formed so as to be able to be sealed by the partition plates 32 and 33. And the inside of the case main body 31 comprises 1st area | region A1 in which the adsorbent filling layer 22 is formed, and 2nd area | region A2 in which the adsorbent filling layer 22 is not formed. In the present embodiment, the second region A2 where the adsorbent filling layer 22 is not formed is configured only on one side (upper side) of the first region A1 where the adsorbent filling layer 22 is formed.

  That is, the adsorbent packed layer 22 of the adsorption module 2A described above is configured to be closer to the lower side in FIG. 2, is in close contact with the lower partition plate 32, and has no space therebetween. A space is provided only between the upper partition plate 33 and this space is used as a water vapor entrance / exit space.

  That is, a water vapor inlet 36 and a water vapor outlet 37, which will be described later, communicate with this space, water vapor from the evaporator is supplied, and water vapor after desorption also exits from this space. Accordingly, a later-described water vapor passage 25A is also opened only on this space side. That is, a bottom portion is formed at a portion that is in close contact with the lower partition plate 32 of the adsorbent packed bed 22, and the water vapor passage 25 </ b> A is a bottomed hole.

  As shown in FIG. 2, the adsorption module 2 </ b> A includes a plurality of hot water pipes (heat medium pipes) 21 through which a heat exchange medium (hot water in this embodiment, and hence the following is referred to as hot water) 21, and each of the hot water pipes 21. And an adsorbent packed layer 22 formed so as to be bonded to the outer surface. Further, in the adsorbent packed bed 22 between the hot water pipes 21, a water vapor passage (adsorbed medium passage) 25A through which water vapor flows is arranged.

  As a feature of the present embodiment, the water vapor passage 25A is formed from the second region A2 toward the inside of the adsorbent packed bed 22, and the water vapor passage 25A is a second region with respect to the inner passage area. It is formed in a tapered shape so that the passage area on the entrance / exit side opened to A2 is widened. The cross-sectional shape of the water vapor passage 25A is a circle in this embodiment, but may be an ellipse, a rectangle, or the like.

  The partition plates 32 and 33 that seal both end surfaces of the case body 31 have a plurality of hot water pipes 21 protruding from the adsorption module 2 </ b> A toward the both end surface sides so as to correspond to the positions of the hot water pipes 21. Hot water pipe holes 32a and 33a are provided. The case body 31, the partition plates 32 and 33, and the hot water pipe holes 32a and 33a of the partition plate 32 and the hot water pipe 21 are airtightly joined by brazing or the like.

  Thus, by sealing the case main body 31 with the partition plate 32, the inside can be maintained in a vacuum. This prevents other gases from entering the internal sealed space formed by the case body 31 and the partition plate 32 in addition to water vapor as an adsorbed medium.

  1 and 2, a water vapor inlet 36 for introducing water vapor from an evaporator (not shown) into the main adsorption heat exchanger 1A at the time of adsorption is provided on the right side near the upper end of the case body 31. Further, on the left side in the vicinity of the upper end of the case body 31, there is provided a water vapor outlet 37 for deriving water vapor from the adsorption heat exchanger 1A to a condenser (not shown) during desorption.

  During the adsorption, the water vapor is distributed from the evaporator side to the water vapor passage 25A of the adsorption module 2A through the water vapor inlet 36. The water vapor distributed to the water vapor passage 25 </ b> A penetrates into the adsorbent packed bed 22. 1 and 2, the lower tank 34 is provided with a hot water inlet 38 that guides hot water as a heat exchange medium at the time of desorption, and the upper tank 35 is provided with a hot water outlet for deriving hot water. 39 is provided.

  The hot water flows into the hot water inlet 38 of the tank 34 and is distributed to a number of hot water pipes 21, which are heated while flowing upward in the adsorbent packed bed 22. Then, the hot water after heat exchange with each hot water pipe 21 gathers in the tank 35 and flows out from the hot water outlet 39. At the time of desorption, water vapor is discharged from the heated adsorbent packed bed 22, and the discharged water vapor is led out from each water vapor passage 25A through the water vapor outlet 37 to the condenser side. Further, cold water flows through the hot water pipe 21 during adsorption, and cools while flowing upward in the adsorbent packed bed 22.

  The case body 31, the partition plates 32 and 33, the tanks 34 and 35, and the inlet and outlet pipes 36 to 39 are formed of copper or a copper alloy and are airtightly and integrally joined by brazing or the like. The The case 3 and the hot water pipe 21 may have any shape such as a cylindrical shape, an elliptical shape, and a rectangular shape in a radial cross section.

  Next, the outline of the manufacturing method of the adsorption heat exchanger 1A mentioned above is demonstrated. First, the hot water pipe 21 is inserted into the lower partition plate 32 and the case main body 31 is set on the partition plate 32. The steam inlet / outlet pipes 36 and 37 may be assembled later, but are assembled to the case body 31 first.

  FIG. 3 is a partial cross-sectional view showing the water vapor passage 25A and a passage forming jig 40A for forming the water vapor passage 25A. Next, after setting a passage forming jig 40A for forming the water vapor passage 25A in the case body 31, the gap is filled with mixed powder in which fibrous copper powder and adsorbent are mixed. And after pressing this mixed powder with the jig | tool which is not shown in figure, the passage formation jig | tool 40A is gently wiped off and the hole space of the water vapor | steam passage 25A is ensured.

  Next, the upper partition plate 33 is inserted into the hot water pipe 21 to assemble the central portion of the heat exchanger, and the tanks 34 and 35 are set above and below the central portion to complete the heat exchanger. In addition, the partition plates 32 and 33 into which the hot water pipe 21 is inserted are fixed by expanding the hot water pipe 21 (expanding the mouth).

  Further, the hot water outlet / inlet pipes 38 and 39 may be assembled later, but are previously assembled in the tanks 34 and 35. Finally, the assembly is placed in a furnace to sinter the adsorbent packed layer 22 and the components are brazed together to complete the heat exchanger. The above assembly method is an example, and the present invention is not limited to this. For example, the passage forming jig 40A may be a method of inserting the mixed powder into the case main body 31 and then inserting it from above. Moreover, (a)-(c) of FIG. 4 is a fragmentary sectional view which shows the other bottom shape of 25 A of water vapor paths. The bottom shape of the water vapor passage 25A may be a plane, a cone, a hemisphere, or the like.

  Next, the features and effects of this embodiment will be described. First, the inside of the case 3 constitutes a first region A1 where the adsorbent filling layer 22 is formed and a second region A2 where the adsorbent filling layer 22 is not formed, and the water vapor passage 25A is a second region. In addition, the water vapor passage 25A is formed so that the passage area on the inlet / outlet side opened to the second region A2 is wider than the passage area on the inner side. ing.

  According to this, the flow path resistance in the vicinity of the entrance / exit of the water vapor passage 25A having a large water vapor flow rate can be reduced. This is because, for example, if the passage shape is formed so that the inner area of each water vapor passage 25A and the total amount of the adsorbent are not different from those of the straight shape, the adsorbed medium can smoothly reach the inside of the water vapor passage 25A. The performance can be improved by the amount that can be entered and exited.

  Similarly, in the same passage volume, the mouth opening shape is easier to insert and remove the passage forming jig 40A that forms the passage than the straight shape, and the passage forming jig 40A for pulling out the passage forming jig 40A is also easy. Since the surface that contacts the adsorbent-filled layer 22 changes from shear peeling to interfacial peeling, it is possible to eliminate the possibility that a part of the adsorbent-filled layer 22 may be destroyed at the time of drawing. Further, the water vapor passage 25A is formed in a tapered shape from the entrance / exit side to the inside side. According to this, specifically, if the water vapor passage 25A is formed in a tapered shape, the above-described effect can be easily realized.

(Second Embodiment)
Next, a second embodiment will be described. FIG. 5 is a longitudinal sectional view showing the internal structure of the adsorption heat exchanger 1B in the second embodiment of the present invention. In the following embodiments, the same components as those in the first embodiment described above are denoted by the same reference numerals, description thereof will be omitted, and different features will be described.

  In the adsorption heat exchanger 1B of the present embodiment, the second region A2 in which the adsorbent packed layer 22 is not formed is on both sides of the adsorbent packed layer 22, and the water vapor passage 25A is connected to the inside from the second region A2 on both sides. The suction module 2B is formed toward the surface. Therefore, the adsorption / desorption water vapor inlet / outlet port 36 </ b> A is common, and the adsorbent packed bed 22 has both ends.

  According to this, by providing the water vapor inlet / outlet in the second region A2 on both sides, an efficient adsorption heat exchanger for adsorbing / desorbing the adsorbed medium from both sides of the adsorbent packed bed 22 is configured. can do. Further, the water vapor passage 25A is arranged so as to face from both sides. According to this, the water vapor passage 25 </ b> A provided from both sides of the adsorbent packed bed 22 may be arranged to face each other as in the present embodiment.

(Third embodiment)
Next, a third embodiment will be described. FIG. 6 is a longitudinal sectional view showing the internal structure of the adsorption heat exchanger 1C in the third embodiment of the present invention. The adsorption heat exchanger 1 </ b> C of the present embodiment is an adsorption module 2 </ b> C that is alternately arranged so that the water vapor passage 25 </ b> A is adjacent from both sides.

  According to this, the water vapor passages 25A provided from both sides of the adsorbent packed bed 22 may be alternately arranged so as to be adjacent to each other as in the present embodiment. In particular, when alternately arranged so as to be adjacent from both sides, the entire adsorbent packed bed 22 can be used efficiently because the thickness of the adsorbent packed bed 22 between the water vapor passages 25A can be made substantially constant.

(Fourth embodiment)
Next, a fourth embodiment will be described. FIG. 7 is a longitudinal sectional view showing the internal structure of the adsorption heat exchanger 1D in the fourth embodiment of the present invention. The adsorption heat exchanger 1D of the present embodiment is an adsorption module 2D in which the water vapor passage 25B is formed in a stepped shape from the inlet / outlet side to the inner side. FIG. 8 is a partial cross-sectional view showing the water vapor passage 25B and a passage forming jig 40B that forms the water vapor passage 25B.

  According to this, even if the water vapor passage 25B is formed in a stepped shape, the flow resistance in the vicinity of the entrance / exit of the water vapor passage 25B having a large water vapor flow rate can be reduced and the performance can be improved as in the first embodiment. Can be improved. However, in the case of a step such as a straight cylinder as shown in FIG. 8, the contact surface between the passage forming jig 40 </ b> B and the adsorbent filling layer 22 when the passage forming jig 40 </ b> B is pulled out remains sheared. It is preferable that the taper shape is stepped as much as possible.

(Other embodiments)
The present invention is not limited to the above-described embodiments, and can be modified or expanded as follows. For example, the upper and lower second regions A2 in the second and third embodiments described above may be communicated with each other through the water vapor passage 25A, or the bottom region is formed in the water vapor passage 25A to form the second region. A2 may have a structure that does not communicate with each other.

  Further, the water vapor passage 25B of the above-described fourth embodiment may be an adsorption heat exchanger formed on the adsorbent packed layer 22 from the upper and lower surfaces as in the second and third embodiments. In the above-described embodiment, Copper is used for the hot water pipe 21 and the porous fin 23, but it may be made of stainless steel or aluminum. Moreover, the structure where the evaporator 1 and the condenser 3 are united may be sufficient.

It is an appearance side view showing adsorption heat exchanger 1A in a 1st embodiment of the present invention. It is a longitudinal cross-sectional view which shows the internal structure of 1 A of adsorption heat exchangers of FIG. It is a fragmentary sectional view showing water vapor passage 25A and passage formation jig 40A which forms it. (A)-(c) is a fragmentary sectional view which shows the other bottom part shape of 25 A of water vapor paths. It is a longitudinal cross-sectional view which shows the internal structure of the adsorption heat exchanger 1B in 2nd Embodiment of this invention. It is a longitudinal cross-sectional view which shows the internal structure of 1 C of adsorption heat exchangers in 3rd Embodiment of this invention. It is a longitudinal section showing the internal structure of adsorption heat exchanger 1D in a 4th embodiment of the present invention. It is a fragmentary sectional view showing water vapor passage 25B and passage formation jig 40B which forms it. It is an end view of the adsorption | suction module 2 used as the premise of this invention. It is XX sectional drawing in FIG. FIG. 10 is a partially enlarged view of FIG. FIG. 12 is a schematic cross-sectional view showing an adsorbent packed layer 22 in FIG. 11. (A)-(c) is a fragmentary sectional view explaining the subject of this invention.

Explanation of symbols

1 ... Adsorption heat exchanger 3 ... Case (casing)
21 ... Hot water pipe (heat medium pipe)
22 ... Adsorbent packed bed 25A, 25B ... Water vapor passage (adsorbed medium passage)
A1 ... first area A2 ... second area

Claims (6)

A casing (3) in which the heat exchange medium and the adsorbed medium flow,
A plurality of heat medium tubes (21) disposed in the casing (3) and through which the heat exchange medium flows;
An adsorbent packed bed (22) formed to be bonded to the outer peripheral surface of the heat medium pipe (21) and adsorbing or desorbing the adsorbed medium;
The adsorbent packed bed (22) between the heat medium pipes (21) is formed in parallel with the axial direction of the heat medium pipe (21), and the adsorbed medium is put on the adsorbent packed bed (22). In the adsorption heat exchanger (1) having the adsorbed medium passage (25A, 25B) to be supplied,
The inside of the casing (3) includes a first region (A1) where the adsorbent packed layer (22) is formed and a second region (A2) where the adsorbent packed layer (22) is not formed. Configured
The adsorbed medium passages (25A, 25B) are formed from the second region (A2) toward the inside of the adsorbent packed bed (22), and the adsorbed medium passages (25A, 25B) are The adsorption heat exchanger is characterized in that the passage area on the inlet / outlet side opened in the second region (A2) is wider than the passage area on the inner side.   2. The adsorption heat exchanger according to claim 1, wherein the adsorbed medium passage (25 </ b> A) is formed in a tapered shape from the inlet / outlet side to the inner side.   The adsorption heat exchanger according to claim 1, wherein the adsorbed medium passage (25B) is formed in a stepped shape from the inlet / outlet side to the inner side.   The second region (A2) is on both sides of the adsorbent packed bed (22), and the adsorbed medium passages (25A, 25B) are formed from the second region (A2) on both sides to the inside. The adsorption heat exchanger according to any one of claims 1 to 3, wherein the adsorption heat exchanger is provided.   The adsorption heat exchanger according to claim 4, wherein the adsorption medium passages (25A, 25B) are arranged so as to face each other from both sides.   The adsorption heat exchanger according to claim 4, wherein the adsorption medium passages (25A, 25B) are arranged so as to be adjacent to each other from both sides.

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