JP2744714B2 - Adsorption cooling device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption cooling device.

[0002]

2. Description of the Related Art As shown in FIG. 2, Freon gas is used as a refrigerant and the engine is used as a power source for cooling a room and / or a refrigerator of a vehicle using an internal combustion engine such as an automobile, a construction machine, and a marine boat as a power source. BACKGROUND ART A vapor compression type cooling device has been conventionally known. This kind of vapor compression type cooling device uses a part of the output of the engine for running or working for cooling, so that not only the load on the engine increases but also the fuel consumption rate decreases. There are problems, and recently, since freon is exclusively used as a refrigerant, regulations such as total amount control and production reduction have been taken due to the problem of ozone layer destruction.

To cope with this, an automobile cooler that uses an adsorption type refrigerator using exhaust heat of an engine as a heat source of a heating unit and does not use Freon gas has been proposed in Japanese Utility Model Laid-Open No. 01-12 / 1999.
6811. In this proposal, as shown in FIG. 3, the evaporating unit 2, an adsorbing unit 3 for adsorbing the refrigerant vapor generated from the evaporating unit 2, and evaporating the adsorbed refrigerant vapor by heating (understood meaning of desorption). An adsorption refrigerator 1 having a heating unit 4 and a condensing unit 5 for condensing vapor from the heating unit is provided, and a heat exchanger 6 of the evaporating unit 2 is connected to a cooling circuit 7 for cooling the interior of the vehicle, thereby adsorbing the adsorbent. The heat exchangers 8 and 9 of the condensing section 5 and the condensing section 5 are connected to a closed air cooling circuit 10, and the heat exchanger 11 of the heating section 4 is connected to an engine heat supply circuit 12.
To use a part of the cooling exhaust heat of the car engine as a heat source.

[0004] The structure of the adsorbent refrigerator 1 will be described in detail below. As shown in FIG. 4, the adsorbent refrigerating machine 1 keeps an adsorbent tank 14 and a vapor tank 15 connected by a vapor flow path 13 sealed in a vacuum state. The two tanks 14 and 15 are provided with two adsorption / desorption units A and B respectively provided with heat exchangers, and the adsorbent tank 14 contains a silica-based solid adsorbent S in which a certain amount of a refrigerant, such as water, is adsorbed. Fill. And the adsorbent tank 14 of the absorption / desorption unit A
Is connected to the engine heat supply circuit 12 as the heat exchanger 11 of the heating unit 4, and the heat exchangers in the steam tank 15 of the absorption / desorption unit A and the adsorbent tank 14 of the absorption / desorption unit B are respectively exchanged. The cooling water is supplied by connecting to the air cooling circuit 10 as devices 9 and 8. Further, the heat exchanger of the steam tank 15 of the absorption / desorption unit B is connected to the cooling circuit 7 as the heat exchanger 6 of the evaporator 2.

As described above, first, the solid adsorbent S in the adsorbent tank 14 of the adsorption / desorption unit A is heated by the supply of engine heat, and the adsorbed refrigerant moisture is evaporated through the vapor passage 13 while being evaporated. Condensed in the exchanger 9 (this is referred to as desorption by the present applicant), and in the adsorption / desorption unit B, when 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. Cold water is supplied, and the cold water of the cooling circuit 7 is passed through the heat exchanger 6 of the steam tank 15 so as to exert an effect of adsorbing the refrigerant vapor, thereby condensing the refrigerant water condensed in the heat exchanger 6 of the steam tank 15. Is evaporated, and the cooling circuit 7 is heated by the latent heat at that time.
Is cooled to about 8 ° C. Here, the heat exchanger 11
, 8, 9 and 6 are exchanged and operated, and the heat exchanger is connected to both tanks 14 and 15 while keeping the adsorbent tank 14 and the steam tank 15 connected by the steam flow path 13 sealed under vacuum. Are separately provided, and the adsorbent tank 14 is filled with a silica-based solid adsorbent S in which a certain amount of a refrigerant, for example, water, is adsorbed.
The adsorbent tank 14 of B is alternately heated and cooled, and the corresponding steam tanks 15 are respectively provided with the condenser 5 (condenser) and the evaporator 2.
The cooling circuit operates alternately as an evaporator, and the cooling circuit is always switched to the evaporator to perform an effective cooling operation by the latent heat associated with the evaporation of the refrigerant in the evaporator.

[0006]

However, such an adsorption refrigerator 1 has an adsorbent tank 14 and a steam tank 1 respectively.
5 requires two absorption / desorption units A and B integrally connected by a steam passage 13, so that the adsorbent tank 14 requires a considerably large volume in terms of the amount of solid adsorbent S currently available. Thus, the area required for the heat exchanger for extracting the latent heat of evaporation becomes considerably large. For applications such as automobiles, which have small, lightweight, low fuel consumption (high performance), and no pollution as criteria for evaluating commercial value. For applications with extremely high mounting density of various devices, low fuel consumption and non-polluting Although this proposal is excellent in terms of points, there are some points to be improved as follows. (1) For vehicles and other facilities powered by an internal combustion engine,
If only the exhaust heat obtained from the cooling water for cooling the engine is used, the required temperature level and the amount of heat are insufficient during idling operation. (2) Forming the adsorbent tank 14 and the steam tank 15 integrally limits the degree of freedom of mounting. (3) It is advantageous to use the heat exchanger 22 of the cooling circuit and the evaporator 2 (steam unit) of the adsorption refrigerator 1 together. (4) As a heat source convenient for desorption, in order to increase the amount of refrigerant that contributes to evaporation by increasing the respiratory volume of the solid adsorbent and increase the cooling capacity, it is preferable that the desorption temperature be high, and that the engine be cooled. If water-based engine exhaust heat alone is not sufficient, it is desirable to also use the heat retained by the engine exhaust heat.

Therefore, the applicant of the present invention has previously disclosed Japanese Patent Application No. 2-32.
No. 4856 proposed an adsorption refrigeration apparatus as described below. That is, in FIG.
Represents an adsorbent filling tank, 101 represents an empty space in the adsorbent filling tank, 110 represents a heat exchange member, 120 represents a solid adsorbent, and 130 represents a solid adsorbent.
Are cylindrical containers, 131A and 131B are heat medium supply ports, 20
0 is a heating medium circuit for heating, 210 is a cooling water circulation circuit of the engine, 211 is an engine, 212 is a radiator, 213 is a diverter valve, 214 is a pump, 215 is a 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 four-way switching valve,
800 is a closed circulation system forming means, 810 is a steam passage, 81
2 is an adjustment valve (position is slightly changed), 900 is a direction switching valve of the heating heat medium circuit 200, 1000 is a direction switching valve of the cooling water circulation circuit 300, and 1100 is a water refrigerant (adsorbate).

[0008] This adsorption type cooling device is composed of two adsorbent filling tanks 100A and 100B and a solid adsorbent 120, respectively.
The empty space 101 is connected by a single vapor 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 and outlet sides, respectively, via directional switching valves 900 and 1000, and one of the directional switching valves is selectively switched. The adsorbent filling tank can be heated and the other can be cooled. The condenser 400, the condensed liquid storage container 500, and the evaporator 600 are moved from the space of one adsorbent filling tank to the 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 desorbed (or released) from the adsorbent filling tank in the desorption step is unidirectionally directed to the adsorbent filling tank in the adsorption step by the switching operation of the four-way switching valve 700 in a hermetically connected manner. Is supplied to the steam passage 810. The vapor supplied to the vapor passage 810 is condensed in the condenser 400, temporarily stored in the condensed liquid storage container 500, and then evaporated by removing heat of evaporation from the cooling load 610 in the evaporator 600, and is adsorbed in the adsorption step. Adsorbed by the adsorbent in the filling tank. The heating heat medium circuit 200 is, for example, an internal combustion engine 211 serving as a power source of a vehicle.
Radiator 212 and pump 21 for cooling
4, the piping 215, the 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.
A valve 81 is provided upstream or downstream of the steam passage 810 from the evaporator 600 to supply steam suitable for the load.
2 is provided. The load of the evaporator 600 is, for example,
1 is the air in the vehicle cabin sent from the blower 612 via the air blower 1, and the drain naturally occurs with the cooling. Therefore, the air is used for cooling the air cooler 310 and / or the condenser 400, that is, the cooling water circulation circuit 300 to improve the performance. Aim. In addition, 4
The two-way valve may be used as the one-way switching valve 700 and the two-way switching valves 900 and 1000 as shown in the modified view of FIG.

FIG. 7 shows adsorption isotherms when water acting as a refrigerant is used as an adsorbate and the adsorbent is (a) JIS A type silica gel, (b) molecular 13X, and (c) molecular 4X. 8 and 9. For example, in the case of JIS A type silica gel and water, as shown in FIG. 7, the water vapor partial pressure 42.2 mmHg (equivalent saturation temperature 35 ° C.) The amount of adsorption qt _{= 85} = 5% at the adsorbent temperature 85 ° C. 0.5 mmHg (equivalent saturation temperature 5 ° C.) When the adsorbent temperature is 35 ° C., the adsorbed amount is different from q _{t = 85} = 9%. Since this change is a reversible change, by appropriately selecting the temperature of the adsorbent and the corresponding pressure of the adsorbate, a predetermined amount of adsorbate can be taken in and out. Δq is 4%, that is, the amount of water movement of 40 g per kg of the adsorbent. FIG. 10 shows the equilibrium respiratory volume Δq of water of each adsorbent. In this apparatus, two units of a container filled with an adsorbent and an adsorbate are provided, and the 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, the other is Is selectively switched to a low-level adsorption process, so that the vapor released from one container (or the adsorbent in the container) in the desorption process is discharged into the other container (or container) in the adsorption process. The other container (or the adsorbent in the container) acts as a kind of suction pump. Since the transfer of the adsorbate to or from the container proceeds in the gas phase, it should be placed in the container so that it proceeds smoothly, that is, to make the contact of the adsorbate with the adsorbent and the uniform separation from the adsorbent. Is provided with a space serving as a passage for the adsorbate vapor, and the vapor is moved through a flow path connected to the space.

Supply and removal of heat to the adsorbent interface: In order to raise and 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 a heat medium passage is built therein and communicates with the outside through heat medium supply ports 131A and 131B. This outside is connected to the adsorbent filling tanks 100A and 10A, respectively.
A pair of direction switching valves 900 and 1000 for selectively connecting the inlets and outlets of the heat medium supply ports 131A and 131B in parallel to the heat medium circuit 200 for heating and the cooling water circulation circuit 300 in parallel.
, A heating medium circuit 200 for heating a high-temperature liquid as a heating source and a cooling water circulation circuit 300 having an air cooler 310 as a cooling source are selectively connected to perform heating and cooling. As a result, desorption occurs at the interface of one adsorbent and adsorption proceeds at the interface of the other adsorbent.

Condensation and evaporation of adsorbate vapor: Since the thermodynamic cooling effect does not occur simply by the movement of the adsorbate vapor accompanying desorption and adsorption, the adsorbate vapor obtained by desorption is cooled to extract the latent heat of the adsorbate. Then, once condensed, a step of evaporating this is indispensable. The condensation of the desorbed vapor is performed through a condenser 400 cooled by a cooling water circulation circuit 300 having an air cooler 310, and the liquefied adsorbate condensed in the condenser 400 is evaporated in an evaporator 600, and a desired medium is removed. Take away heat, ie take out the cooling action. At this time, the pressure between the condenser 400 and the evaporator 600 is, for example, 4 if the condensing temperature is 35 ° C. from the relation of the gas-liquid equilibrium as an operating variable.
2.2 mmHg, evaporation temperature is 5 mm, 6.5 mmHg, and the condenser 4
00 and the evaporator 600 are designed.

Switching of steam flow paths: The interiors of the two adsorbent filling tanks communicate with each other through two flow paths of a four-way switching valve 700, and the other two flow paths of the four-way switching valve 700 flow. The road is
From one side to the other, a closed circulation system forming means 800 connected in order of the condenser 400, the liquid storage container 500, and the evaporator 600 forms a single vapor flow path. And they form a single steam channel, 2
While the base adsorbent-filled tank alternately repeats desorption and adsorption respectively, the space of the adsorbent-filled tank on the desorption side is always on the inlet side of the condenser 400, and the space of the adsorbent-filled tank on the adsorption side is always It is connected to the outlet side of the evaporator 600 and produces a one-way vapor flow.

Suppression of vapor flow fluctuation due to switching between desorption and adsorption operation: When liquid storage container 500 alternately switches between desorption and adsorption of two adsorbent filling tanks, it suppresses fluctuation of vapor flow in the vapor flow path. It acts as a buffer.

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

Waste heat recovery of internal combustion engine: automobile, construction machine,
Cooling of the internal combustion engine used for a vehicle powered by an internal combustion engine such as a marine boat, or equipment equipped with a diesel generator or the like is performed by cooling water circulating around a cylinder of the engine by a cooling water circulation circuit 210. Done. An exhaust heat exchanger 220 is connected in series or parallel to the cooling water circulation circuit 210 to recover the exhaust heat of the engine and to recover a predetermined amount of heat at a higher temperature than that recovered by the conventional cooling water circulation circuit 210, and to desorb the adsorbent. Increase the temperature, increase the respiration rate of the adsorbate, thereby increasing the amount of steam generated per unit weight of the adsorbent, and enhance the cooling effect. In addition, while obtaining the same cooling effect, the adsorbent filling tank can be reduced in size and weight with a small amount of adsorbent. The cooling load of the vehicle varies depending on the type of vehicle, driving conditions, and weather conditions. For example, the cooling load is as follows. That is, in the case of a passenger car having a displacement of 2000 cc class, when the outside air temperature is 35 ° C. and the vehicle interior temperature is 25 ° C., the vehicle speed is approximately 3500 Kcal / h at a speed of 40 km / h and approximately 2500 Kcal / h during idling operation. On the other hand, paying attention to idling operation, the heat radiation of the radiator in the existing cooling water system is about 2600 Kcal
/ H. The amount of heat that contributes to cooling with respect to the amount of heat used for heating is such that the coefficient of performance of this type of cooling device is 0.
Considering that it is 5 to 0.7, it turns out to be insufficient. Here, if the amount of heat held by the exhaust gas is recovered up to about 200 ° C., the amount of heat recovered from the internal combustion engine as a whole is estimated to be about 4500 Kcal / h, which is a heat amount that can sufficiently cover the cooling load. You can count on driving conditions as well,
Exhaust heat recovery is required.

Air cooler and / or evaporator 6 for increasing the condensation capacity
Since air containing water vapor acts as a cooling load at 00, the saturation partial pressure of water vapor in the air cooled by the evaporator decreases, and excess water vapor is separated as a drain 601. If this cooled drain 601 is used to cool 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 to prevent loss of cold heat and increase the capacity of the air cooler and / or condensation. .

Selection of the adsorbent: Once the adsorbate is determined and the adsorption temperature, desorption temperature, evaporation pressure and condensation pressure are determined, the selection of the adsorbent depends on the factors governing the cooling capacity per unit weight of the adsorption cooler. Become. Adsorbate is water, adsorption temperature /
Desorption temperature = 35/85 ° C, evaporation temperature saturation pressure / condensation temperature saturation pressure = 6.5 / 42.2 mmHg The respiratory volume of the adsorbent 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, JIS of granular porosity of angstrom order
Type A silica gel to activated alumina are preferred as adsorbents.

However, according to a subsequent study, in such a cooling apparatus, the temperature control of the medium to be cooled, that is, the air, is mainly performed by controlling the supply flow rate of the cooling medium to the evaporator as shown in FIG. Due to the adjustment performed through the valve, the flow rate is small and the liquid level is inevitably fluctuated, making it impossible to adjust the flow rate with high accuracy, making it difficult to control the air temperature. found. The present invention has been proposed in view of such circumstances. In addition to reducing the size of the adsorbent tank and increasing the degree of freedom of arrangement of the device to increase the cooling capacity, the air temperature is controlled by controlling the liquid level of the evaporator. It is an object of the present invention to provide an energy-saving and pollution-free adsorption type cooling device which facilitates the above.

[0019]

For this purpose, the present invention provides at least two adsorbent filling tanks each containing a solid adsorbent and a heat transfer tube, and a refrigerant generates a unidirectional vapor flow in each of the filling tanks. A condenser and an evaporator are connected so as to circulate, and when one of the filling tanks performs an adsorption step, a heating medium and a cooling medium are switched so that the other performs a desorption step. A refrigerant liquid storage container is provided on the outlet side of the condenser, the refrigerant liquid storage container is set slightly below the inlet header of the evaporator, and an on-off valve that opens and closes on the inlet side of the evaporator according to a cooling load. Is provided.

[0020]

According to such a configuration, the adsorbent filling tank 100
The adsorbent is switched by connecting the inlet and outlet of the heat medium supply ports 131A and 131B of the heat transfer mediums A and 100B to the heating heat medium circuit 200 and the cooling water circulation circuit 300 in parallel connection by a pair of direction switching valves 900 and 1000, respectively. It is possible to obtain an energy-saving and pollution-free adsorption type refrigeration apparatus by reducing the size of the tank, increasing the degree of freedom of arrangement and the apparatus, and increasing the cooling capacity. Further, the temperature of the medium to be cooled can be controlled with high accuracy only by a simple ON / OFF operation of fully opening and closing the flow control valve, and therefore, the flow rate of the medium to be cooled, that is, the air is not required.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. FIG. 1 is an overall schematic diagram of the same, in which the same reference numerals as in FIG. 5 denote the same members as in FIG. The different points are the vertical relationship between the refrigerant liquid storage container and the evaporator provided on the outlet side of the cold condenser and the on-off valve provided on the inlet side of the evaporator.

In the above figure, the temperature of the medium to be cooled, that is, the air is controlled by adjusting the supply flow rate of the cooling medium, that is, water, to the evaporator. The storage container 500 is installed so that the surface is at a relatively low level within about 25 cm with respect to the liquid level in the evaporator 600, and a flow control valve 813 is provided at a location near the evaporator in a pipe connecting the two. In addition, a throttle valve such as an orifice may be provided between the storage container 500 and the evaporator 600 in addition to the flow control valve in order to reduce a change in the flow when the flow control valve 813 is fully opened. According to such a structure, the liquid level of both the storage container 500 and the evaporator 600 is set so that the pressure head causing the flow is reduced. the pressure difference [Delta] P before and after the [Delta] P = P ₃ of _{(P E -γ · Δh 1)} P 3 = P C -γ · ΔP from (Δh-Δh ₁₎ of the relationship = P _C -P _E -γ · Δh becomes, The pressure head is reduced by γ · Δh and control becomes easier. Further, by providing a throttle valve, pressure loss due to the flow reduces the fluid moving ability. According to such a structure, the flow rate can be kept small even when the valve is fully opened by the flow control valve, so that the flow can be accurately controlled only by a simple ON / OFF operation of the fully closed and fully opened without fine adjustment of the valve opening. Adjustment is possible, and thus, the temperature of the medium to be cooled can be controlled. Needless to say, the present invention can be applied to the evaporator of the adsorption type cooling device shown in FIG.

As described above, according to the adsorption type cooling device having the condenser whose liquid level is lower than the evaporator and the on-off valve attached to the evaporator, the following effects can be obtained. (1) Since the adsorbent tank 14 (FIG. 4) and the steam tank 15 (FIG. 4) are separated from each other, their installation is considerably free. (2) Heat exchanger 22 (FIG. 4) in the cooling circuit and adsorption refrigerator 1
The structure is simplified by also using the evaporator 2 (evaporator) (FIG. 4). (3) As a heat source for desorption, in order to increase the amount of refrigerant that contributes to evaporation by increasing the respiratory volume of the specific adsorbent and increase the cooling capacity, the desorption temperature is preferably high, and the cooling water for the engine is preferably used. If the exhaust heat of the engine alone is not sufficient, the heat retained by the exhaust gas of the engine is also used to contribute to the increase in the respiratory volume of the adsorbate, and the cooling capacity of the cooling device per unit weight is improved. (4) The steam flow path is only one, and this type of cooling device has an extremely simple configuration, which greatly contributes to miniaturization and weight reduction, and can also be expected to increase reliability due to the extremely simple configuration. (5) As the weight is reduced and the engine power is not required, the transport power of the vehicle is reduced and the fuel efficiency is improved. (6) Since the cooling capacity can be obtained without using a chlorofluorocarbon-based refrigerant, it greatly contributes to prevention of ozone layer depletion. (7) Highly accurate temperature control of the medium to be cooled can be performed only by a simple on / off operation of fully opening and closing the flow control valve, so that it is not necessary to adjust the flow rate of the medium to be cooled, that is, air.

[0024]

In summary, according to the present invention, at least two adsorbent filling tanks each containing a solid adsorbent and a heat transfer tube are provided, and a refrigerant generates a one-way vapor flow and circulates through each of the filling tanks. A condenser and an evaporator are connected so that when one of the filling tanks performs an adsorption step, the other is a heating medium and a cooling medium that switches a cooling medium so as to perform a desorption step. A refrigerant liquid storage container was provided on the outlet side, the refrigerant liquid storage container was installed slightly below the inlet header of the evaporator, and an on-off valve that was opened and closed according to a cooling load was provided on the inlet side of the evaporator. This makes it possible to reduce the size of the adsorbent tank and increase the degree of freedom in arranging the equipment to increase the cooling capacity, and also to control the air temperature by controlling the liquid level of the evaporator. Book Akira is extremely useful on the industry.

[Brief description of the drawings]

FIG. 1 is an overall summary system diagram showing one embodiment of the present invention.

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

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

FIG. 4 is a detailed view of FIG. 3;

FIG. 5: Japanese Patent Application No. Hei 2-3248 proposed earlier by the present applicant.
It is the whole system diagram which shows the adsorption-type refrigeration apparatus which concerns on No. 56.

FIG. 6 is an overall system diagram showing a modification of FIG. 5;

FIG. 7 is a diagram showing adsorption isotherms of typical adsorbents.

FIG. 8 is a diagram showing adsorption isotherms of typical adsorbents.

FIG. 9 is a diagram showing an adsorption isotherm of a typical adsorbent.

FIG. 10 is a diagram showing a comparative example of a respiratory volume of an adsorbate.

FIG. 11 is a summary diagram of FIG. 5;

[Explanation of symbols]

 100A, 100B Adsorbent filling tank 101 Vacancy in adsorbent filling tank 110 Heat exchange member 120 Solid adsorbent 130 Cylindrical container 131A, 131B Heat medium supply port 200 Heating medium circuit for heating 210 Cooling water circuit of engine 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 Condensing unit 500 Condensed liquid storage container 600 Evaporator 601 Drain 610 Cooling load 611 Duct 612 Blower 700 Four-way switching valve 800 Hermetic Circulation system forming means 810 Steam passage 813 Flow control valve 900 Direction switching valve 1000 Direction switching valve 1100 Water refrigerant (adsorbate)

 ──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Harunobu Mizukami 1 Nagoya City, Nakamura-ku, Iwatsuka-cho, Takamichi 1 Mitsuhishi Heavy Industries, Ltd. Nagoya Research Laboratories (56) References JP-A-4-194561 (JP, A) 1983-190669 (JP, A)

Claims (1)

(57) [Claims] At least two adsorbent filling tanks each containing a solid adsorbent and a heat transfer tube are provided, and a condenser and an evaporator are provided in each of the filling tanks so that a refrigerant generates and circulates a unidirectional vapor flow. And an adsorption type cooling device that switches a heating medium and a cooling medium so that one of the filling tanks performs an adsorption step while the other performs a desorption step, and a refrigerant liquid storage container is provided at an outlet side of the condenser. And the refrigerant liquid storage container is installed slightly below the inlet header of the evaporator,
An adsorption type cooling device comprising an opening / closing valve which is opened and closed according to a cooling load at an inlet side of the evaporator.