JPH0536264U - Adsorption type heat exchanger - Google Patents

Abstract

(57) [Summary] [Purpose] The heat transfer performance of the heat transfer fins of an adsorption heat exchanger shall correspond to the heat load capacity. A heat transfer tube disposed in an adsorbent corresponding to an adsorbent or in an adsorbent corresponding to an adsorbent in an adsorption chamber and cooled or heated by latent heat of vaporization of the adsorbate or heat of condensation of the adsorbent; In the adsorption heat exchanger having the heat pipe provided with the fins in the week, the heat transfer area of the fins was made larger toward the portion closer to the heat transfer tube main body so as to correspond to the heat load capacity.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention proposes an adsorbent such as zeolite or silica gel that performs an adsorbing action and a desorbing action of the adsorbate, such as water, which undergoes a phase change between a gas phase and a liquid phase and a temperature change. In combination, it relates to the structure of the heat transfer tube part of an adsorption heat exchanger in which the latent heat of vaporization of the adsorbate during the adsorbing action of the adsorbent and the latent heat of condensation during the releasing action are used as, for example, a cooling and heating source for air conditioning. ..

[0002]

[Prior Art]

 As an adsorption type refrigerating device, one disclosed in Japanese Utility Model Laid-Open No. 64-41056 is conventionally known.

In this type of adsorption refrigeration system, the latent heat of vaporization / condensation associated with the adsorption / release of the adsorbate gas medium by the adsorbent is used as, for example, a heat source for air conditioning. As shown in the above-mentioned known example, generally, a heat exchanger with fins is provided in the adsorbate or adsorbent in the adsorption chamber of the adsorption heat exchanger to secure cold water or hot water. It is customary to use the heat exchanger as a heat source for cooling or heating in the heat exchanger inside the air conditioner.

[0004]

[Problems to be solved by the device]

 However, the above-mentioned conventional finned heat exchanger is composed of, for example, a plate fin having a constant plate thickness, a mesh fin having a constant mesh thickness and a fixed number of laminated plates, which are integrally joined to the outer peripheral surface of the heat transfer tube body. However, it was installed without considering the temperature deviation in the adsorbate or the adsorbent (which is caused by the difference in the heat load due to the difference in the distance from the heat transfer tube). Therefore, the fin portion does not always perform a good heat transfer function in relation to the temperature deviation, and there is a problem that the heat exchange performance as the heat exchanger is not sufficient.

[0005]

[Means for Solving the Problems]

 The invention described in each of claims 1 to 4 of the invention of the present application was made for the purpose of solving the above problems, and is configured as follows.

(1) Configuration of the device according to claim 1 The adsorption heat exchanger according to the invention as defined in claim 1 is, for example, as shown in FIGS. 1 to 6, an adsorbent 8 corresponding to an adsorbent 6 in an adsorption chamber. Alternatively, the heat transfer tubes 7a to 7d and 9a to 9d, which are arranged in the adsorbent 6 corresponding to the adsorbate 8 and are cooled or heated by the latent heat of vaporization of the adsorbate 8 or the heat of condensation of the adsorbent 6, and the heat transfer tube 7a. In the adsorption heat exchanger having fins 10 and 14 provided on the outer periphery of 7d to 9d to 9d, the heat transfer area of the fins 10 and 14 is close to that of the heat transfer tubes 7a to 7d and 9a to 9d. The feature is that it is made larger for the part.

(2) Configuration of the invention of claim 2 The adsorption heat exchanger of the invention of claim 2 is based on the configuration of the invention of claim 1 as shown in FIG. The fin 10 in the configuration is a plate-shaped fin, and the fins 10 are thicker as they are closer to the heat transfer tubes 7a to 7d and 9a to 9d.

(3) Structure of the invention according to claim 3 The adsorption heat exchanger of the invention according to claim 3 is based on the structure of the invention according to claim 1 as shown in FIG. The fins 14 in the structure are made of mesh fins, and the mesh distribution of the fins 14 is made denser toward the portions closer to the heat transfer tubes 7a to 7d and 9a to 9d.

(4) Configuration of the invention of claim 4 The adsorption heat exchanger of the invention of claim 4 is based on the configuration of the invention of claim 1 as shown in FIG. The fins 14 in the structure are composed of a plurality of mesh fin laminated bodies 14a to 14c, and the number of laminated layers is larger in the portions closer to the heat transfer tubes 7a to 7d and 9a to 9d. ..

[0010]

[Action]

 The inventions described in each of claims 1 to 4 of the present application are configured as described above. As a result, the following actions are achieved corresponding to each configuration.

(1) Operation of the device of claim 1 In the structure of the adsorption heat exchanger of the device of claim 1, first, the adsorbent 8 corresponding to the adsorbent 6 or the adsorbate 8 corresponds to the adsorbent 6 in the adsorption chamber. The heat transfer tubes 7a to 7d, 9a to 9d, which are arranged in the adsorbent 6 and are cooled or heated by the latent heat of vaporization of the adsorbate 8 or the heat of condensation of the adsorbent 6, and the heat transfer tubes 7a to 7d, 9a to 9d. Since the fins 10 and 14 provided on the outer periphery are provided, a cooling action by the latent heat of vaporization accompanying the evaporation of the adsorbate 8 and a heating action by the latent heat of condensation accompanying the desorption of the adsorbate 8 from the adsorbent 6 are realized respectively. To be done.

The fins 10 and 14 of the heat exchanger portion in the adsorbate 8 or the adsorbent 6 that realize the cooling or heating action in this case have the heat transfer areas thereof as heat transfer tubes 7a to 7d and 9a to 9d. Since the part closer to the main body is made larger, the absolute value of the heat transfer performance between the adsorbate 8 and the adsorbent 6 is improved, and the performance is affected by the temperature deviation in the adsorbate 8 and the adsorbent 6. Fluctuation becomes small.

(2) Operation of the invention according to claim 2 In the adsorption heat exchanger according to the invention according to claim 2, in addition to the same operation as the invention according to claim 1 due to the function of the basic constituent part, Since the fin 10 portion is made of a plate-like fin, and the thickness of the fin 10 is closer to the heat transfer tubes 7a to 7d and 9a to 9d, the space between the fin 8 and the adsorbent 6 is larger. The effect of improving the heat transfer performance is excellent, and the performance fluctuation due to the temperature deviation in the adsorbate 8 and the adsorbent 6 is sufficiently small.

(3) Operation of the invention according to claim 3 In the adsorption heat exchanger of the invention according to claim 3, in addition to the same operation as the invention according to claim 1 due to the function of its basic constituent part, in particular, Since the fins 14 are made of mesh fins, and the mesh distribution of the fins is closer to the heat transfer tubes 7a to 7d and 9a to 9d, the density is higher. The effect of improving the heat transfer performance is particularly good, and the performance fluctuation due to the influence of temperature deviation in the adsorbate 8 and the adsorbent 6 is sufficiently small.

(4) Operation of the invention of claim 4 In the adsorption heat exchanger of the invention of claim 4, in addition to the operation of the invention of claim 1 by the function of the basic constituent parts, In particular, since the fin 14 is composed of a laminated body of a plurality of mesh fins 14a to 14c, and the number of laminated layers is larger in the portion closer to the heat transfer tube main body, it is between the adsorbate 8 and the adsorbent 6 above. The effect of improving the heat transfer performance is particularly excellent as compared with the device of the invention described in claim 3, and the performance fluctuation due to the influence of the temperature deviation in the adsorbate 8 and the adsorbent 6 is much smaller.

[0016]

[Effect of the device]

 Therefore, according to the adsorption heat exchanger of the present invention, the heat transfer performance can be improved as much as possible regardless of the temperature deviation in the adsorbate or the adsorbent, which in turn improves the heat pump capacity of the air conditioner side. It can also contribute to the improvement of COP (heat exchange efficiency).

[0017]

【Example】

 Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First Embodiment First, FIGS. 2 and 3 show an adsorption refrigeration system 1 using an adsorption heat exchanger according to a first embodiment of the present invention.

The adsorption type refrigerating apparatus 1 is configured as a cooling water producing apparatus for producing cooling water for cooling using, for example, waste hot water.

First, the adsorption type refrigerating apparatus 1 is configured to include two sets of vacuum enclosures, a first vacuum enclosure 3a and a second vacuum enclosure 3b each having a vacuum chamber 2a, 2b formed therein. The vacuum chambers 2a and 2b of the first and second two sets of vacuum housings 3a and 3b are communicated with each other via a communication passage 4.

Then, the first vacuum chamber 2a in the first vacuum housing 3a is filled with a solid adsorbent 6 such as silica gel, and is placed in the solid adsorbent 6 to be heated by the first finned heat. The switch 7 is installed. Further, an evaporable adsorbate 8 such as water is housed in the second vacuum chamber 2b in the second vacuum housing 3b, and the second fin-equipped heat exchange is located in the adsorbate 8. A container 9 is installed.

The respective portions of the heat transfer tubes 7a to 7d and 9a to 9d of the first and second finned heat exchangers 7 and 9 are configured, for example, as shown in FIG.

That is, the heat transfer tubes 7a to 7d and 9a to 9d are integrally joined to the plate-like fins 10 on the outer peripheral surface thereof, and the plate-like fins 10 transfer heat from the outer end side. The plates are thicker as they are closer to the pipes 7a to 7d and 9a to 9d, and the heat transfer efficiency by contact with the solid adsorbent 6 or the adsorbate 8 is increased.

As shown in FIG. 2, cooling water W ₁ (30 ° C.) and cold water W ₂ (12 ° C.) are respectively placed in the heat transfer tubes 7a to 7d and 9a to 9d of the heat exchangers 7 and 9, respectively. It is supplied through the first and second pipes 11 and 12.

Therefore, as a result, the solid adsorbent 6 is cooled by the cooling water W _{1 having the} water temperature of 30 ° C. via the first heat exchanger with fins 7, and the active adsorption action is achieved. Therefore, the refrigerant vapor generated by the evaporation of the adsorbate 8 on the second vacuum chamber 2b side tends to be adsorbed through the communication passage 4.

As a result, the adsorbate 8 efficiently starts to evaporate, and the refrigerant vapor thereof is gradually adsorbed in the solid adsorbent 6. Then, due to the latent heat of vaporization at that time, the cold water W ₂ at 12 ° C. supplied from the second pipe 12 through the second heat exchanger 9 with fins is cooled to low temperature cold water W ₃ at 7 ° C. and discharged. . The low-temperature cold water W ₃ is sent to a secondary-side device such as an indoor air conditioner and used as cooling water for cooling. In this way, the freezing action by the adsorption action of the adsorbate 8 is realized.

On the other hand, when the refrigerating action due to the adsorption of the adsorbate 8 progresses as described above, the adsorption capacity of the adsorbent 6 eventually reaches a saturated state and the adsorption power decreases.

Then, hot water W ₄ (70 ° C.) is supplied from the first pipe 11 and flows into the heat transfer pipes 7 a to 7 d of the first finned heat exchanger 7 this time. Then, the solid adsorbent 6 is heated by the hot water W _{4 at} 70 ° C., and desorption of the adsorbed refrigerant vapor starts. The desorbed refrigerant vapor is returned to the inside of the second vacuum chamber 2b on the side of the second vacuum housing 3b via the communication passage 4 contrary to the time of the adsorption.

In this state, on the other hand, since the cooling water W ₅ having a water temperature of about 30 ° C. is supplied from the second pipe 12, the second finned heat exchanger 9 functions as a condenser. As a result, the refrigerant vapor is returned to the original liquid state.

In each of the above cases, in the configuration of the present embodiment, the fin portions of the first and second heat exchangers 7 and 9 with fins, in particular, the fin-shaped heat exchangers 7 and 9 have plate-like fins 10 The heat transfer tubes 7a to 7d and 9a to 9d are thicker as they are closer to the main body, so that the effect of improving the heat transfer performance with the adsorbent 8 or the adsorbent 6 is good, and the adsorbate 8 or the adsorbent 8 is adsorbed. The performance fluctuation due to the influence of the temperature deviation in the agent 6 becomes sufficiently small.

Second Embodiment Next, FIG. 4 shows a configuration of a main part of an adsorption heat exchanger according to a second embodiment of the present invention.

In the structure of the heat transfer tubes 7a to 7d and 9a to 9d of the first and second heat exchangers with fins 7 and 9 in the first embodiment, for example, plate-shaped fins are used. However, a mesh fin, for example, can be adopted as the fin. The mesh fins generally have a higher heat exchange performance than the plate fins, and it is relatively easy to change the heat transfer coefficient of each part of the fin surface by changing the mesh size.

Therefore, in this embodiment, as shown in FIG. 4, the fin portions of the first and second heat exchangers with fins 7 and 9 are constituted by the mesh fins 14, and the mesh fins 14 have a mesh structure. It is characterized in that the distribution of the heat transfer tubes 7a to 7d and 9a to 9d is closer to the main body.

As described above, when the fin portion is composed of the mesh fins 14 and the mesh distribution of the fin portions is closer to the heat transfer tubes 7a to 7d and 9a to 9d, the adsorbate 8 or the adsorbent 6 is formed. The effect of improving the heat transfer performance between and is particularly good, and the performance fluctuation due to the influence of the temperature deviation in the adsorbate 8 and the adsorbent 6 is sufficiently reduced.

(Third Embodiment) FIG. 5 shows a structure of a main part of an adsorption heat exchanger according to a third embodiment of the present invention.

When the mesh fins are used as in the second embodiment, the heat transfer performance itself is sufficiently improved.

If it is desired to further improve the heat transfer performance of the mesh fin, if a plurality of the mesh fins 14 are laminated to form a fin member, the heat transfer area is increased and the heat transfer efficiency is greatly improved.

Also in that case, as in the case of the third embodiment, the mesh density of each mesh fin 14a, 14b, 14c is increased as it gets closer to the heat transfer tubes 7a to 7d, 9a to 9d and the heat load. Of course, it is possible to secure an efficient heat transfer area commensurate with the capacity. However, in the case where, for example, the first to third plurality of laminated fins 14a to 14c are used as described above, FIG. As shown in Fig. 4, the width of each of the first and third mesh fins 14a, 14c is narrowed down by utilizing the feature, whereby the number of mesh fins laminated near the body of the heat transfer tubes 7a-7d, 9a-9d. It is also possible to realize a heat transfer performance distribution corresponding to the heat load capacity by increasing the relative amount.

(Fourth Embodiment) FIG. 6 shows a structure of a main part of an adsorption heat exchanger according to a fourth embodiment of the present invention.

When a plurality of mesh fins are laminated and used as in the third embodiment, a method of substantially changing the number of fins in the laminated portion by changing the width of each mesh fin as described above is used. Besides, it is also possible to change the heat transfer efficiency by changing the stacking pitch between the mesh fins as shown in FIG. 6, for example.

(Fifth Embodiment) In each of the above embodiments, the solid adsorbent 6 is assumed to be housed in the entire first vacuum container 3a. However, for example, when the plate-shaped fin 10 as in the first embodiment is adopted as the first heat exchanger 7, the solid adsorbent 6 itself is also plate-shaped and integrated with the fin itself as shown in FIG. 7, for example. It is also possible to polymerize them to improve the heat transfer efficiency.

[Brief description of drawings]

FIG. 1 is a perspective view showing a configuration of a heat transfer tube portion of an adsorption heat exchanger according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view in an adsorption step of an adsorption refrigeration apparatus configured using the adsorption heat exchanger.

FIG. 3 is a cross-sectional view in a desorption process of an adsorption refrigeration apparatus configured using the same adsorption heat exchanger.

FIG. 4 is a perspective view showing a configuration of a heat transfer tube portion of an adsorption heat exchanger according to a second embodiment of the present invention.

FIG. 5 is a perspective view showing a structure of a heat transfer tube portion of an adsorption heat exchanger according to a third embodiment of the present invention.

FIG. 6 is a cross-sectional view showing a configuration of a heat transfer tube portion of an adsorption heat exchanger according to a fourth embodiment of the present invention.

FIG. 7 is a perspective view showing a configuration of a main part of an adsorption heat exchanger according to a fifth embodiment of the present invention.

[Explanation of symbols]

1 is an adsorption refrigeration system, 2a is a first vacuum chamber, 2b is a second vacuum chamber, 3a is a first vacuum housing, 3b is a second vacuum housing,
Reference numeral 4 is a communication passage, 7a to 7d, 9a to 9d are heat transfer tubes, 10 is a plate fin, and 14 is a mesh fin.

Claims (4)

[Scope of utility model registration request] 1. An adsorbate (8) corresponding to the adsorbent (6) or an adsorbent (6) corresponding to the adsorbate (8) is disposed in the adsorption chamber, and the latent heat of vaporization of the adsorbate (8) or Heat transfer tubes (7a-7d), (9a-9) that are cooled or heated by the heat of condensation of the adsorbent (6)
d) and the fins (10) and (14) provided on the outer circumference of the heat transfer tubes (7a to 7d) and (9a to 9d), the fins (10), (14) ) Heat transfer area
(7a to 7d), (9a to 9d) An adsorption heat exchanger characterized in that it is made larger toward a portion closer to the main body. 2. The fin (10) is formed of a plate-shaped fin, and the thickness of the fin (10) is thicker in portions closer to the main bodies of the heat transfer tubes (7a-7d), (9a-9d). Item 1. The adsorption heat exchanger according to item 1. 3. The fins (14) are mesh fins, and the mesh distribution of the fins (14) is denser toward the heat transfer tubes (7a-7d), (9a-9d). The adsorption heat exchanger according to claim 1. 4. A portion in which the fin (14) is a laminate of a plurality of mesh fins (14a) to (14c), and the number of the laminate is close to the heat transfer tubes (7a to 7d), (9a to 9d) main body. The adsorption heat exchanger according to claim 1, wherein the adsorption heat exchanger has a large number of components.