JPH05113271A - Absorption cooling device - Google Patents

Abstract

PURPOSE:To increase the cooling capacity by coating a water-absorptive resin on inner surfaces of heat transfer tubes. CONSTITUTION:A water-absorptive polymer 564 is coated on the lower inner surface of an evaporation tube 562 and water-absorptive wicks 565 are closely attached on the surface of the water-absorptive polymer 564. Therefore, water is sucked up to an adequate height according to a capillary phenomenon of the water-absorptive polymer 564 and the wicks 565 formed on the inner surface. Thereby, the length of part of the evaporation tube 562 immersed in water is minimized and a liquid film is formed on the heat transfer surface by the wicks 565 so that a required amount of water is retained. As a result, liquid is uniformly, stably supplied over the whole heat transfer surface. Moreover, the voids inside the wicks 565 serve as vapor paths and causes vapor to escape easily, so that a maximum heat transfer amount can be achieved at a low pressure loss, thus the cooling capacity can be increased.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to an adsorption cooling device.

[0002]

2. Description of the Related Art For cooling a room and / or a refrigerator of a vehicle powered by an internal combustion engine such as an automobile, a construction machine, a marine boat, etc., as shown in FIG. Vapor compression cooling devices have been known for some time. Since this type of vapor compression cooling device uses a part of the output of the engine for running or working for cooling, it not only increases the load on the engine but also reduces the fuel consumption rate. There are some problems, and recently, Freon is exclusively used as a refrigerant. Therefore, due to the problem of ozone layer depletion, regulations such as total amount control and production reduction have been taken.

Therefore, for the purpose of coping with this, an automobile cooler that uses an adsorption refrigerator that uses exhaust heat of an engine as a heat source of a heating unit and does not use CFCs is disclosed in Japanese Utility Model No. 01-12.
No. 6811. In this proposal, as shown in FIG. 3, an evaporation unit 2, an adsorption unit 3 that adsorbs a refrigerant vapor generated from the evaporation unit 2, and an adsorbed refrigerant vapor are evaporated (understood as desorption) by heating. An adsorption refrigerator 1 having a heating part 4 and a condensing part 5 for condensing the vapor from the heating part is provided, and the heat exchanger 6 of the evaporating part 2 is connected to a cooling circuit 7 for cooling the interior of the vehicle for adsorption. The heat exchangers 8 and 9 of the section 3 and the condenser section 5 are connected to the closed air cooling circuit 10, and the heat exchanger 11 of the heating section 4 is connected to the engine heat supply circuit 12.
And uses part of the cooling exhaust heat of the automobile engine as a heat source.

To explain this structure in detail, as shown in FIG. 4, in the adsorption refrigerator 1, the adsorbent tank 14 and the steam tank 15 which are connected to each other by the steam passage 13 are hermetically sealed in a vacuum state. Two adsorbing / desorbing units A and B, which are respectively provided with heat exchangers respectively, are provided in both tanks 14 and 15, and the adsorbent tank 14 is provided with a silica-based solid adsorbent S adsorbing a certain amount of a refrigerant, for example, water. Fill. And the adsorbent tank 14 of the adsorption / desorption unit A
Is connected to the engine heat supply circuit 12 as the heat exchanger 11 of the heating section 4, and the heat exchangers in the steam tank 15 of the adsorption / desorption unit A and the adsorbent tank 14 of the adsorption / desorption unit B are respectively heat-exchanged. The cooling water is supplied by connecting to the air cooling circuit 10 as the vessels 9 and 8. Further, the heat exchanger of the steam tank 15 of the adsorption / desorption unit B is connected to the cooling circuit 7 as the heat exchanger 6 of the evaporator 2.

In this way, first, the solid adsorbent S in the adsorbent tank 14 of the adsorption / desorption unit A is heated by the supply of engine heat to evaporate the adsorbed refrigerant moisture and heat it through the vapor flow path 13. After condensing in the exchanger 9 (this is called desorption by the applicant), and in the adsorption / desorption unit B, after the desorption of the adsorption / desorption unit A is completed, the heat exchanger 8 of the adsorbent tank 14 is heated to about 30 ° C. By supplying cold water and passing the cold water of the cooling circuit 7 through the heat exchanger 6 of the steam tank 15, the refrigerant water is made to exhibit the adsorbing action of the refrigerant steam and condensed in the heat exchanger 6 of the steam tank 15. And the latent heat at that time causes the cooling circuit 7 to evaporate.
The cold water in the above is cooled to about 8 ° C. Here, the heat exchanger 11
And 8, 9 and 6 are operated in pairs, and the adsorbent tank 14 and the steam tank 15 connected by the steam flow path 13 are hermetically sealed under a vacuum condition to both tanks 14 and 15. The adsorbent tank 14 is filled with a silica-based solid adsorbent S that adsorbs a certain amount of a refrigerant, for example, water.
The adsorbent tank 14 of B is alternately heated and cooled, and the corresponding steam tanks 15 are respectively condensed by the condenser 5 (condenser) and the evaporator 2.
By alternately operating as an (evaporator) and switching and connecting the cooling circuit to the evaporating section at all times, an effective cooling operation is performed by latent heat accompanying evaporation of the refrigerant in the evaporating section.

[0006]

However, such an adsorption type refrigerator 1 has an adsorbent tank 14 and a steam tank 1, respectively.
Since two adsorbing / desorbing units A and B in which 5 are integrally connected by the vapor passage 13 are required, the adsorbent tank 14 requires a considerably large volume in the adsorbing amount characteristics of the solid adsorbent S currently available. Therefore, the required area of the heat exchanger for taking out latent heat of vaporization becomes considerably large. It has small size, light weight, low fuel consumption (high performance), and no pollution as criteria for evaluating the product value, such as for automobiles, and it has low fuel consumption and no pollution to CFCs for applications with extremely high mounting density of various equipment. Although this proposal is excellent in terms of points, there are some points to be improved as described below. (1) For vehicles and other equipment powered by an internal combustion engine,
Only by using the exhaust heat obtained from the cooling water for cooling the engine, the required temperature level and the amount of heat are insufficient during idling operation. (2) The integral construction of the adsorbent tank 14 and the steam tank 15 limits the degree of freedom of mounting. (3) It is advantageous to use both the heat exchanger 22 of the cooling circuit and the evaporation section 2 (steamer) of the adsorption refrigerator 1. (4) As a convenient heat source for desorption, it is preferable that the desorption temperature is high in order to increase the amount of refrigerant that contributes to evaporation by increasing the breathing amount of the solid adsorbent and to increase the cooling capacity. If the engine exhaust heat based on water is not sufficient, it is desirable to use the heat of the engine exhaust heat in combination.

Therefore, the present applicant has previously filed Japanese Patent Application No. 2-32.
With the No. 4856, the following adsorption type refrigeration system was proposed. That is, in FIG. 5, 100A, 100B
Is an adsorbent filling tank, 101 is a space in the adsorbent filling tank, 110 is a heat exchange member, 120 is a solid adsorbent, and 130 is a solid adsorbent.
Is a cylindrical container, 131A and 131B are heat medium supply ports, 20
Reference numeral 0 is a heating heat medium circuit, 210 is an engine cooling water circulation circuit, 211 is an engine, 212 is a radiator, 213 is a flow dividing valve, 214 is a pump, 215 is piping, 220 is an exhaust heat exchanger, 300 is a cooling water circulation circuit, 310 is an air cooler, 320 is a pump, 400 is a condenser, 500 is a condensed liquid storage container, 600 is an evaporator, 601 is a drain, 6
11 is a duct, 612 is a blower, 700 is a 4-way switching valve,
800 is a closed circulation system forming means, 810 is a steam passage, 81
Reference numeral 1 is a throttle valve, 900 is a direction switching valve of the heating medium circuit 200 for heating, 1000 is a direction switching valve of the cooling water circulation circuit 300,
1100 is a water refrigerant (adsorbate).

This adsorption-type cooling device includes two adsorbent-filled tanks 100A and 100B and a solid adsorbent 120, respectively.
The empty space 101 formed by is connected by a single steam passage 810 via a four-way switching valve 900, and each adsorbent filling tank 100A,
The heat exchange member 110 of 100B is connected in parallel to the heating heat medium circuit 200 and the cooling water circulation circuit 300 on the inlet side and the outlet side, respectively, via the direction switching valves 900 and 1000, and one of them is selectively switched by the direction switching valve. The adsorbent-filled tank can be heated and the other cooled. The condenser 400, the condensed liquid storage container 500, and the evaporator 600 are moved from the empty space of one adsorbent filling tank to the empty space of the other adsorbent filling tank via the closed circulation system forming means 800 and the four-way switching valve 700. The adsorbate vapor that is hermetically connected and desorbed (or released) from the adsorbent filling tank in the desorption process by the switching operation of the four-way switching valve 700 is unidirectionally directed toward the adsorbent filling tank in the adsorption process. To the steam passage 810. The vapor supplied to the vapor passage 810 is condensed in the condenser 400 and once stored in the condensed liquid storage container 500, and then the evaporator 600 removes the heat of vaporization from the cooling load 610 to evaporate the adsorbent in the adsorption step. Adsorbed by the adsorbent in the filling tank. The heating medium circuit 200 is, for example, an internal combustion engine 211 that serves as a power source for a vehicle.
Radiator 212 and pump 21 for cooling
4, piping 215, cooling water circulation circuit 210
The exhaust heat exchanger 220 is connected in series or in parallel, and the radiator 212 and the adsorbent filling tank are connected in parallel via the flow dividing valve 213. In this way, a higher temperature heat source obtained by cooling the cylinder portion of the engine 211 is obtained.
On the upstream side or the downstream side of the steam passage 810 from the evaporator 600, an appropriate throttle 811 is provided in order to supply steam suitable for the load.
To provide. The load of the evaporator 600 is, for example, the duct 611.
Air in the vehicle compartment sent from the blower 612 through
Since drainage naturally occurs with cooling, this is used for cooling the air cooler 310 and / or the condenser 400, that is, the cooling water circulation circuit 300 to improve performance. The four-way switching valve 700 and the directional switching valves 900 and 1000 may be two-way valves as shown in the modification of FIG.

Here, the adsorption isotherms when water acting as a refrigerant is an adsorbate and the adsorbent is (a) JIS A type silica gel (b) molecular 13X (c) molecular 4X are shown in FIG. As shown in FIGS. 8 and 9. For example, in the case of JIS A type silica gel and water, as shown in FIG. 7, water vapor partial pressure 42.2 mmHg (equivalent saturation temperature 35 ° C.) adsorbent temperature 85 ° C. adsorbed amount q _{t = 85} = 5% water vapor partial pressure 6 0.5 mmHg (equivalent saturation temperature 5 ° C.) When the adsorbent temperature is 35 ° C., the adsorption amount q _{t = 35} = 9%, which are different from each other. Since this change is a reversible change, it is possible to take in and out a predetermined amount of adsorbate by appropriately selecting the temperature of the adsorbent and the pressure of the corresponding adsorbate. Δq is 4%, that is, 40 g of water is transferred per 1 kg of the adsorbent. FIG. 10 shows the equilibrium respiration amount Δq of water of each adsorbent. This apparatus is provided with two containers, a container filled with an adsorbent and an adsorbate, and the above two levels of pressure and temperature at the interface between the adsorbent and the adsorbate in the container, respectively, when one is in the desorption process at a high level By selectively switching to a lower level adsorption process, the vapor released from one container (or the adsorbent in the container) in the desorption process is in the other container (or container) in the adsorption process. Is sucked by the adsorbent), and the other container (or the adsorbent in the container) acts as a kind of suction pump. The movement of the adsorbate to and from the container proceeds in the gas phase, so that it can proceed smoothly, that is, in order to make the contact of the adsorbate with the adsorbent and the separation from the adsorbent uniform, Is provided with a cavity serving as a passage for the adsorbate vapor, and vapor is moved through a flow path connected to the cavity.

Supply and removal of heat from the adsorbent interface: In order to raise or lower the temperature of the adsorbent, a heat source for heating and a cooling source for cooling are required. The heat exchange member 110 is provided so that the adsorbent covers the surface of the heat exchange member 110, and the heat medium passage is built in the heat exchange member 110 and communicates with the outside through the heat medium supply ports 131A and 131B. The adsorbent filling tanks 100A, 10
A pair of directional switching valves 900, 1000 for selectively connecting the inlets and outlets of the heat medium supply ports 131A, 131B of 0B to the heating heat medium circuit 200 and the cooling water circulation circuit 300 in parallel.
By connecting to the cooling water circulation circuit 300 including the heating medium circuit 200 for heating, which is a heating source of high temperature liquid, and the air cooler 310, which is a cooling source, heating and cooling are performed. As a result, desorption occurs at the interface of one adsorbent and adsorption progresses at the interface of the other adsorbent.

Condensation and evaporation of adsorbate vapor: Since the thermodynamic cooling action does not occur by simply moving the adsorbate vapor accompanying desorption and adsorption, the adsorbate vapor obtained by desorption is cooled in order to extract the latent heat of the adsorbate. Then, a process of once condensing and then evaporating this is indispensable. This desorption vapor is condensed through the condenser 400 cooled by the cooling water circulation circuit 300 having the air cooler 310, and the liquefied adsorbate condensed in the condenser 400 is evaporated in the evaporator 600, so that the desired medium is removed. It takes away heat, that is, takes out the cooling action. At that time, the pressures of the condenser 400 and the evaporator 600 are 4 as long as the condensation temperature is 35 ° C., for example, from the gas-liquid equilibrium relationship as an operating variable.
The temperature is 2.2 mmHg, and if the evaporation temperature is 5 ° C., it is 6.5 mmHg, and the condenser 400 and the evaporator 600 are designed so as to satisfy this condition involving heat transfer.

Switching of vapor flow paths: The insides of the two adsorbent-filled tanks are communicated with each other through the two flow paths of the four-way switching valve 700 and the other two flow paths of the four-way switching valve 700. The road is
From one side to the other side, the condenser 400, the liquid storage container 500, and the evaporator 600 are hermetically connected by the closed circulation system forming means 800 that is connected in this order to form a single vapor flow path. And they form a single vapor flow path,
Whereas the base adsorbent filling tank alternately repeats desorption and adsorption, the desorption side adsorbent filling tank is always on the inlet side of the condenser 400 and the adsorption side adsorbent filling tank is on the adsorbent side. It is connected to the outlet side of the evaporator 600 and produces a one-way steam flow.

Suppression of variation in vapor flow rate due to switching of desorption and adsorption: When the liquid storage container 500 is alternately switched between desorption and adsorption of two adsorbent-filled tanks, variation in vapor amount in the vapor passage is suppressed. Acts as a buffer.

Cooling action: The adsorbate liquefied in the condenser 400 self-cools to its pressure saturation temperature at the inlet of the evaporator 600, and then takes heat from the medium, which is a cooling load, and evaporates. For example, when the vaporization pressure saturation temperature is 5 ° C., the latent heat of vaporization of water is 594.
Since it is 6 Kcal / kg, a cooling effect of 23.8 Kcal per unit weight (1 kg) of the adsorbent is obtained.

Exhaust heat recovery of internal combustion engine: automobile, construction machine,
A cooling water circulation circuit 210 circulates cooling water around a cylinder of the engine to cool a vehicle such as a marine boat that uses an internal combustion engine as a power source or a facility equipped with a diesel generator or the like. Done. Exhaust heat exchanger 220 is connected to this cooling water circulation circuit 210 in series or in parallel to recover the exhaust heat of the engine to recover a higher temperature and a predetermined amount of heat than that recovered by the conventional cooling water circulation circuit 210 to desorb the adsorbent. It raises the temperature and the respiration rate of the adsorbate, thereby increasing the amount of steam generated per unit weight of the adsorbent and enhancing the cooling effect. Further, in addition to the same cooling effect, the adsorbent filling tank can be made smaller and lighter with a small amount of adsorbent. The cooling load of the vehicle varies depending on the type of vehicle, operating conditions, and weather conditions, but is as follows as an example. In other words, in the case of a passenger car with a displacement of 2000 cc, if the outside air temperature is 35 ° C and the passenger compartment temperature is 25 ° C, the vehicle speed is about 3500 Kcal / h when running and about 2500 Kcal / h when idling. On the other hand, especially when idling, paying attention to the amount of heat dissipated by the radiator in the existing cooling water system is about 2600 Kcal.
/ H. Regarding the amount of heat that contributes to cooling with respect to the amount of heat used for heating, the coefficient of performance of this type of cooling device is 0.
Considering that it is 5 to 0.7, it can be seen that there is a shortage. Here, if the heat quantity of the exhaust gas is recovered to about 200 ° C., the heat quantity recovered from the internal combustion engine as a whole is estimated to be about 4500 Kcal / h, which is a heat quantity that can sufficiently cover the cooling load. Heat can be calculated in the same way even under driving conditions, and exhaust heat recovery is required.

Air cooler and / or evaporator with increased condensation capacity 6
Since air containing water vapor acts as a cooling load on 00, the saturated partial pressure of water vapor in the air cooled by the evaporator decreases, and excess water vapor is separated as drain 601. If this cooled drain 601 is used for cooling the air cooler 310 of the cooling water circulation circuit 300 and / or the condenser 400 cooled by the cooling water circulation circuit 300, it helps prevent loss of cold heat and increases the capacity of the air cooler and / or condensation. ..

Selection of adsorbent: Once the adsorbate is determined and the adsorption temperature, desorption temperature, evaporation pressure, and condensation pressure are determined, the choice of adsorbent is a factor that controls the cooling capacity per unit weight of the adsorption cooler. Become. Water as the adsorbate, adsorption temperature /
The respiration rate of the adsorbent for desorption temperature = 35/85 ° C., evaporation temperature saturation pressure / condensation temperature saturation pressure = 6.5 / 42.2 mmHg is as follows: (1) 4.0% (2) 3. 2% (3) 2.5% (4) 1.
5% However, (1) JIS A type silica gel (2) Activated alumina (3) Zeolite 4A (4) Zeolite 13X, which is a granular porous JIS of Angstrom order
A type silica gel to activated alumina are suitable as the adsorbent.

However, in the subsequent studies, in the conventional evaporator used in such a cooling device, as shown in FIG. 11, the gas header and the lower liquid header are connected by a plurality of vertical evaporation pipes. Cage, water 4-7 mm
In order to evaporate with Hg, the evaporation ability greatly changes with respect to the height H of the evaporation tube according to the height h of the water level, as shown in FIG. This is because the evaporation temperature rises by the amount of water head, and the submerged part becomes difficult to evaporate, so when only the water surface boils and bubbles rise in the evaporation tube, a liquid film is formed on the heat transfer surface, and this liquid film By evaporating. The present invention has been proposed in view of such circumstances, and the adsorbent tank is miniaturized to increase the degree of freedom of arrangement of the device to increase the cooling capacity, and at the same time, to achieve the maximum capacity with low pressure loss. It is an object of the present invention to provide an energy- and pollution-free adsorption cooling device.

[0019]

To this end, according to the present invention, at least two adsorbent filling tanks containing a solid adsorbent and heat transfer tubes are provided, and each of the filling tanks produces a unidirectional vapor flow. In the adsorption-type cooling device, the condenser and the evaporator are connected so as to circulate, and the process is alternately switched so that when one of the filling tanks performs the adsorption process, the other performs the desorption process. Is a fin tube type evaporator in which the heat transfer tubes are arranged in the vertical direction, and a water absorbent resin is applied to the inner surface of the heat transfer tubes.

[0020]

According to such a configuration, the adsorbent filling tank 100
The inlet and outlet of the heat medium supply ports 131A and 131B of A and 100B are switched in parallel to the heating heat medium circuit 200 and the cooling water circulation circuit 300 by a pair of directional control valves 900 and 1000, respectively, to thereby form an adsorbent. It is possible to obtain an energy-saving and pollution-free adsorption type refrigeration system by downsizing the tank and increasing the degree of freedom of arrangement and equipment and increasing the cooling capacity. In addition, by minimizing the submerged portion of the evaporation tube, the wick forms a liquid film on the heat transfer surface, and a required amount of water is retained, so that the heat transfer surface is uniformly and stably supplied with a low temperature. Maximum cooling capacity with pressure loss.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to the drawings, an embodiment of the present invention will be described. FIG. 1 is a partial longitudinal sectional view of the evaporator, in which the same reference numerals as those in FIG. The difference from the structure in the figure is that a wick is applied to the inner surface of the evaporation tube. That is, in FIG.
Reference numeral 60 is a water-absorbent resin polymer that is applied to the lower portion of the inner surface of the evaporation pipe 562, and a water-absorbent wick 565 is closely attached to the surface thereof.

According to such an evaporator, water is sucked up to an appropriate height by the capillary phenomenon by the water absorbing polymer 560 and the wick 565 formed on the inner surface thereof. This minimizes the submerged portion of the evaporation pipe 562, and the wick 56
As a result, a liquid film is formed on the heat transfer surface by 5 and the required amount of water is retained, so that the liquid is uniformly and stably supplied to the entire heat transfer surface, and the inner space of the wick serves as a steam passage to discharge water vapor. The maximum heat transfer is obtained with low pressure loss. It goes without saying that the present invention can also be applied to the evaporator of the adsorption cooling device shown in FIG.

According to the adsorption cooling device having such an evaporator, the following effects can be obtained. (1) Since the adsorbent tank 14 (Fig. 4) and the steam tank 15 (Fig. 4) are configured separately from each other, their installation is quite free. (2) Heat exchanger 22 of cooling circuit (Fig. 4) and adsorption refrigerator 1
The structure is simplified by also using the evaporation unit 2 (evaporator) of FIG. 4 (FIG. 4). (3) As a heat source for desorption, it is preferable that the desorption temperature is high in order to increase the respiration rate of the specific adsorbent to increase the amount of refrigerant that contributes to evaporation and to increase the cooling capacity. When the exhaust heat of the engine based on the above is insufficient, the heat retained by the exhaust of the engine is also used to contribute to the increase of the respiration rate of the adsorbate, and the cooling capacity per unit weight of the cooling device is improved. (4) Since there is only one steam flow path, this type of cooling device has an extremely simple structure, which greatly contributes to downsizing and weight reduction. At the same time, an extremely simple structure can be expected to increase reliability. (5) Since the vehicle is lighter in weight and does not require engine power, vehicle transportation power is reduced and fuel efficiency is improved. (6) Since the cooling capacity can be taken out without using a CFC-based refrigerant, it greatly contributes to the prevention of ozone layer depletion.

[0024]

In summary, according to the present invention, at least two adsorbent filling tanks containing a solid adsorbent and a heat transfer tube are provided, and the refrigerant circulates in each of the filling tanks by generating a unidirectional vapor flow. In the adsorption type cooling device, in which the condenser and the evaporator are connected to each other so that one of the filling tanks performs the adsorption process and the other performs the desorption process alternately, the evaporator is connected to the heat transfer tube. Is a fin-tube type evaporator arranged vertically, and a water-absorbent resin is applied to the inner surface of the heat transfer tube, which reduces the size of the adsorbent tank and increases the degree of freedom in arranging the equipment, thus improving the cooling capacity. The present invention is extremely useful industrially because an energy-saving and pollution-free adsorption cooling device that achieves maximum capacity with low pressure loss can be obtained.

[Brief description of drawings]

FIG. 1 is a partial vertical sectional view of an evaporator according to an embodiment of the present invention.

FIG. 2 is a system diagram showing a car cooler system using known freon gas.

FIG. 3 is a system diagram showing a known adsorption type car cooler.

FIG. 4 is a detailed view of FIG.

FIG. 5: Japanese Patent Application No. 2-3248 proposed by the present applicant
It is the whole system diagram showing the adsorption type refrigeration equipment concerning No. 56.

FIG. 6 is an overall system diagram of the modification of FIG.

[Fig. 7]

[FIG. 8]

FIG. 9 is a diagram showing adsorption isotherms of typical adsorbents.

FIG. 10 is a diagram showing a comparative example of respiration rate of adsorbate.

FIG. 11 is a vertical sectional view showing the conventional evaporator used in FIG. 5 and an enlarged sectional view taken along the arrow thereof.

12 is a diagram showing the relationship between the evaporation amount of the evaporator of FIG. 11 and h / H.

[0025]

[Explanation of symbols]

 100A, 100B Adsorbent filling tank 101 Vacant in adsorbent filling tank 110 Heat exchange member 120 Solid adsorbent 130 Cylindrical vessel 131A, 131B Heat medium supply port 200 Heating heat medium circuit 210 Engine cooling water circulation circuit 211 Engine 212 Radiator 213 Dividing valve 214 Pump 215 Piping 220 Exhaust heat exchanger 300 Cooling water circulation circuit 310 Air cooler 320 Pump 400 Condenser 500 Condensed liquid storage container 550 Gas-liquid separator 560 Upper gas header 561 Lower liquid header 562 Evaporation pipe 563 Fin 564 Water-absorbent resin 565 Wick 600 Evaporator 601 Drain 610 Cooling load 611 Duct 612 Blower 700 4-way switching valve 800 Closed circulation system forming means 810 Steam passage 811 Throttle valve 900 Direction switching valve 1000 Direction switching Replacement valve 1100 Water refrigerant (adsorbate)

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Minoru Hanai 1 Takamichi, Iwazuka-cho, Nakamura-ku, Nagoya, Aichi Prefecture Mitsubishi Heavy Industries, Ltd. Nagoya Research Institute

Claims (1)

[Claims] 1. An adsorbent filling tank containing a solid adsorbent and a heat transfer tube is provided at least two tanks, and a condenser and an evaporator are provided so that the refrigerant circulates in each of the filling tanks by generating a unidirectional vapor flow. In the adsorption type cooling device, in which the heat exchanger tubes are connected to each other, and when one of the filling tanks performs the adsorption process, the other alternately performs the desorption process, the heat transfer tube is arranged in the vertical direction in the evaporator. The adsorption cooling device is characterized in that a fin-tube type evaporator is used and a water absorbent resin is applied to the inner surface of the heat transfer tube.