JP3424385B2 - Adsorption refrigeration equipment and adsorption air conditioning equipment - 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 type refrigeration system utilizing adsorption / desorption of a vapor phase refrigerant by an adsorbent and an adsorption type air conditioning system utilizing the adsorption refrigeration system.

[0002]

2. Description of the Related Art For example, as a refrigerating device used in a refrigerator, an air conditioner or the like, an adsorption refrigerating device using water, alcohol or the like as a refrigerant has been considered. This type of adsorption refrigeration system is provided with a plurality of adsorption units containing an adsorbent, an evaporator that cools the outside air by vaporizing the refrigerant, and a condenser that liquefies the gas-phase refrigerant to give the refrigerant to the evaporator. By selectively connecting the adsorption unit to the evaporator and the condenser, the adsorption unit connected to the evaporator is operated for adsorption operation and the adsorption unit connected to the condenser is operated for desorption operation. Is configured to let.

The adsorbent contained in this adsorption unit is
It has the property of adsorbing the vapor phase refrigerant in a low temperature state and desorbing the vapor phase refrigerant in a high temperature state. Therefore, since the adsorption unit for adsorption operation, which is connected to the evaporator, adsorbs the vapor phase refrigerant evaporated in the evaporator, the evaporation of water in the evaporator can be promoted and a cooling effect can be exerted.

In this case, in the adsorption unit for adsorption operation, which is connected to the evaporator, the adsorbent heats up due to the heat of adsorption and the refrigerating capacity is lowered. The cooling medium is circulated between the radiator and the radiator so that the heat of adsorption is recovered in the cooling medium and is radiated by the radiator for the cooling medium.

On the other hand, in the adsorption unit for desorption operation connected to the condenser, since the vapor phase refrigerant can be desorbed by heating the adsorbent, the heating medium is circulated between the adsorption unit and the heating source. By doing so, the adsorbent is heated.

[0006] Then, by liquefying the vapor phase refrigerant from the adsorption unit for desorption operation into the refrigerant in the condenser and supplying it to the evaporator, the cooling capacity of the evaporator can be continuously exerted.

When the adsorbent housed in the adsorption unit for the adsorption operation is in the adsorption full state as the adsorption operation proceeds, the latent heat of vaporization of the vapor phase refrigerant evaporated in the evaporator decreases. As a result, the freezing capacity will decrease. Therefore,
When the adsorption capacity of the adsorption unit for adsorption operation decreases, the adsorption unit for adsorption operation is switched to desorption operation and the adsorption unit for desorption operation is switched to adsorption operation to improve the cooling capacity of the evaporator. It can be continued.

By the way, in recent years, it has been considered to apply the adsorption type refrigeration system to a vehicle air conditioner. in this case,
Cool the adsorption unit for adsorption operation with a cooling medium, heat the adsorption unit for desorption operation with a heating medium such as engine cooling water or exhaust gas, and further cool the air blown into the passenger compartment with an evaporator. To configure.

Here, when the adsorption unit for desorption operation is configured to be heated by utilizing the exhaust heat of the engine for traveling the vehicle, the heat capacity of the engine can be sufficiently secured while the vehicle is traveling. Since the heat capacity of the engine becomes small during idling of the engine, even if the adsorption unit for desorption operation is heated by the exhaust heat of the engine, it cannot be sufficiently heated. For this reason, there is a drawback that the regeneration of the adsorbent stored in the adsorption unit for desorption operation is insufficient and the refrigerant cannot be continuously supplied to the evaporator.

Therefore, in Japanese Patent Laid-Open No. 5-133638, the idle speed of the engine is increased in order to secure the heat quantity of the engine during idling. With such a configuration, the heat capacity of the engine can be sufficiently ensured even during idling of the engine, so that the adsorbent can be sufficiently regenerated by the exhaust heat of the engine even during idling.

[0011]

However, the above-mentioned Japanese Unexamined Patent Publication No. 5-133638 has a drawback that the fuel consumption is significantly deteriorated because it is necessary to increase the engine speed during idling. Further, since the state in which the heat capacity of the engine is low continues at the time of starting the engine or immediately after the starting, the problem that the regeneration of the adsorbent becomes insufficient due to the exhaust heat of the engine still remains.

The present invention has been made in view of the above circumstances, and an object thereof is to exhibit a cooling action by using an adsorbent that adsorbs a vapor phase refrigerant in a low temperature state and desorbs the vapor phase refrigerant in a high temperature state. In the configuration, when the temperature of the heating medium for heating the adsorbent is low, the adsorption type refrigerating apparatus and the adsorption type air conditioning apparatus can be provided that can recover the adsorption heat to the heating medium and efficiently promote the temperature rise. Especially.

[0013]

In the adsorption type refrigeration system of the present invention, a plurality of adsorption units containing an adsorbent that adsorbs the vapor phase refrigerant in a low temperature state and desorbs the vapor phase refrigerant in a high temperature state are provided. An adsorption unit for adsorption operation is provided with an evaporator for outflowing a vapor phase refrigerant, and a condenser for condensing the vapor phase refrigerant flowing from the adsorption unit for desorption operation into a refrigerant and providing it to the evaporator is provided for adsorption operation. A cooling means for cooling the adsorption unit is provided, and a heating source that forms a heating medium circulation path through which the heating medium passes between the adsorption unit for desorption operation is provided.
During the heating capacity lowering period when the temperature of the heating source is lower than the temperature of the adsorption unit for the adsorption operation, a switching means is provided for thermally connecting the adsorption unit and the heating source through the heating medium circulation path. (Claim 1).

In the above structure, the cooling means may stop the cooling operation during the heating capacity lowering period (claim 2).

The cooling means may be composed of a cooling medium radiator that forms a cooling medium circulation path through which the cooling medium passes between the cooling unit and the adsorption unit for the adsorption operation (claim 3).

Further, the switching means connects the adsorption unit for adsorption operation and the heating source in a heat transfer manner through the cooling medium circulation passage in addition to the heating medium circulation passage during the heating capacity lowering period. It may be (claim 4).

The adsorption type air conditioner of the present invention is provided with the adsorption type refrigeration system having the above-mentioned constitution, the heating source is constituted to be heated by the exhaust heat of the internal combustion engine, and the evaporator is blown into the room. May be configured to be cooled (Claim 5).

[0018]

In the adsorption type refrigerating apparatus according to the first aspect, since the adsorbent of the adsorption unit for adsorption operation adsorbs the vapor phase refrigerant flowing from the evaporator, evaporation of the refrigerant is promoted in the evaporator. As a result, the evaporator exhibits a cooling effect. At this time, since the adsorption unit for the adsorption operation is cooled by the cooling means, the adsorption operation can be continued.

On the other hand, since the heating medium circulation path through which the heating medium passes is formed between the adsorption unit for desorption operation and the heating source, the adsorbent of the adsorption unit for desorption operation is heated and the vapor phase refrigerant is cooled. Desorption. Then, the condenser condenses the vapor-phase refrigerant that has flowed in from the adsorption unit for desorption operation and sends it to the evaporator, so that the evaporator can continue the cooling action.

The temperature of the heating medium is low at the beginning of heating of the heating source. Therefore, even if the heating medium is supplied to the adsorption unit for desorption operation, the adsorbent in the adsorption unit can be heated. It becomes difficult to desorb the vapor phase refrigerant.

Therefore, the switching means thermally connects the adsorption unit and the heating source through the heating medium circulation path during the heating capacity lowering period when the temperature of the heating source is lower than the temperature of the adsorption unit for adsorption operation. As a result, the heating medium is heated by the adsorption unit that has generated heat due to the adsorption operation, so that the heat of adsorption can be efficiently collected in the heating medium and the temperature rise can be promoted.

In the adsorption type refrigerating apparatus according to the second aspect, the cooling means stops the cooling operation during the heating capacity lowering period, so that it is possible to prevent the adsorption unit for the adsorption operation from being unnecessarily cooled. The temperature rise of the heating medium can be accelerated.

In the adsorption type refrigerating apparatus according to the third aspect, the cooling medium circulation path is formed between the adsorption unit and the cooling medium radiator, and the cooling medium is cooled by the cooling medium radiator. The adsorption unit for the adsorption operation can be efficiently cooled and the adsorption of the vapor phase refrigerant can be continued.

In the adsorption refrigerating apparatus according to the fourth aspect, the switching means transfers the adsorption unit for adsorption operation and the heating source through the cooling medium circulation path in addition to the heating medium circulation path during the heating capacity lowering period. Since the heating medium is thermally connected, the heating medium is heated not only through the heating medium circulation passage but also through the cooling medium circulation passage, whereby the heat of adsorption can be efficiently collected in the heating medium and the temperature rise can be promoted.

In the adsorption type air conditioner according to the present invention, since the heating medium is heated by the exhaust heat during the internal combustion period, the temperature of the heating source is low at the start of the internal combustion period, and the temperature of the heating medium decreases accordingly. Although the state continues, the temperature rise of the heating medium can be promoted by the adsorption unit for the adsorption operation.

By supplying the heating medium having a sufficiently high temperature to the adsorption unit for desorption operation as described above, the adsorbent in the adsorption unit can be heated and sufficiently regenerated, so that evaporation Due to the cooling action of the container, it is possible to quickly blow the cool air into the vehicle interior.

[0027]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment in which the present invention is applied to a vehicle air conditioner (automatic air conditioner) will be described below with reference to FIG. FIG. 1 schematically shows the overall configuration. This Figure 1
In, the first adsorption unit 1 is connected to the condenser 3 and the evaporator 4 via the three-way valve 2, and the second adsorption unit 5
Is connected to the condenser 3 and the evaporator 4 via a three-way valve 6. Further, the condenser 3 and the evaporator 4 are connected via a receiver 7 and a pump 8. With the above configuration, the first adsorption unit 1 (second adsorption unit 5) passes through the evaporator 4 and the condenser 3 to the second adsorption unit 5
A closed space leading to the (first adsorption unit 1) is formed. In all three-way valves, the valves in the conductive state are shown in a white state and the valves in the closed state are shown in a painted state.

Here, the closed space is filled with a refrigerant. As the refrigerant, water, an alcohol aqueous solution obtained by adding alcohol to water, an ammonia-based refrigerant, or the like is used, but it is preferable to use water because the latent heat is large.

The first adsorption unit 1 and the second adsorption unit 5 are constructed by accommodating an adsorbent 10 in a hollow container 9. As the adsorbent 10, for example, silica gel, zeolite, activated carbon, activated alumina or the like having a property of adsorbing water is used.

A blower fan (not shown) is provided corresponding to the evaporator 4, and cool air is blown into the vehicle compartment through the evaporator 4 by the blower fan. A condenser fan (not shown) is provided corresponding to the condenser 3, and the condenser 3 is cooled by blowing air from the condenser fan.

On the other hand, the first and second adsorption units 1 and 5 are heated by the exhaust heat of the engine as an internal combustion engine. That is, the engine 11 has a water jacket 11a as a heating source, and the water jacket 11a is connected to the first and second adsorption units 1 and 5 via the three-way valve 12, and the three-way valve 1
According to the switching state of No. 2, the water jacket 11a and the first
Alternatively, the second adsorption unit 1 or 5 is thermally connected to the second adsorption unit 1 or 5 through a heating medium circulation path 13.

The first and second adsorption units 1 and 5 are cooled by the cooling medium radiator 14. That is, the cooling medium radiator 14 is connected to the first and second adsorption units 1 and 5 via the three-way valve 15, and the cooling medium radiator 14 and the first adsorption unit 1 and the second adsorption unit 1 are connected to each other in accordance with the switching state of the three-way valve 15. Alternatively, the second adsorption unit 1 or 5 is thermally connected to the second adsorption unit 1 or 5 through the cooling circulation passage 16. In this case, cooling water is sealed as a refrigerant in the radiator 14 for cooling medium and the circulation passage 16 for cooling, and the radiator 1 for cooling medium 1 is operated when the pump 25 is operating.
The cooling water circulates between the cooling water circulation passage 16 and the cooling circulation passage 16 and is cooled by the cooling medium radiator 14.

A temperature sensor 17 for detecting the temperature of the cooling water from the water jacket 11a is provided at the cooling water outlet of the water jacket 11a. Further, in the first and second adsorption units 1 and 5, a temperature sensor 18 for detecting the temperature of the cooling water from the adsorption units 1 and 5 is provided on the outlet side of the heating medium circulation path 13.

The arithmetic unit 19 calculates the temperature of the cooling water based on the detection signals from the temperature sensors 17 and 18,
The calculation result is notified to the control device 20 as the switching means. Then, the control device 20 switches the three-way valves 2, 6, 12, 15 according to the arithmetic processing by the arithmetic unit 19 and controls the operation of the pumps 8, 25.

Next, the operation of the above configuration will be described. In this case, it is assumed that the engine has finished warming up and the temperature of its cooling water is sufficiently high. Also,
The adsorbent 10 of the first adsorption unit 1 is in a regeneration completed state after the desorption operation, and the adsorbent 1 of the second adsorption unit 5 is
0 indicates the suction operation end state. Furthermore, each three-way valve 2,
It is assumed that 6, 12, 15 are switched as shown in FIG.

When the cooling operation is instructed, the controller 20 drives a blower fan (not shown). As a result, the air in the vehicle compartment or the outside air is blown into the vehicle compartment through the evaporator 4, so that the water in the evaporator 4 evaporates as water vapor. Therefore, since the evaporator 4 and the air passing through the evaporator 4 are heat-exchanged with each other, the blown air can be cooled into the vehicle interior.

At this time, since the evaporator 4 is in communication with the first adsorption unit 1 through the three-way valve 2, the adsorbent 10 contained in the first adsorption unit 1 absorbs the water vapor flowing from the evaporator 4. Adsorb. Further, the water stored in the receiver 7 is supplied to the evaporator 4 by driving the pump 8 by the control device 20. As a result, the water vapor pressure in the evaporator 4 is reduced, the evaporation of water in the evaporator 4 is promoted, and water is supplied to the evaporator 4, so that the evaporator 4 can continue the cooling action. .

In this case, although the temperature of the adsorbent 10 housed in the first adsorption unit 1 for adsorption operation rises due to the heat of adsorption, the first adsorption unit 1 for adsorption operation has a radiator for the cooling medium. Since it is connected to 14 and cooled by cooling water, the adsorption action can be continuously exerted.

On the other hand, since the cooling water as the heating medium is supplied from the water jacket 11a to the second adsorption unit 5, the adsorbent 10 accommodated in the second adsorption unit 5 is heated and the adsorption is carried out accordingly. The water adsorbed on the agent 10 becomes desorbed as water vapor. At this time, the second adsorption unit 5 passes through the three-way valve 6 and the condenser 3
Since it is in communication with the second adsorption unit 5, the water vapor in the second adsorption unit 5 moves to the condenser 3 and is cooled by the condenser 3 to be water and sent to the receiver 7.

As a result of the above operation, the second suction unit 5
In the closed space from the condenser 3 and the evaporator 4 to the first adsorption unit 1, an adsorption operation is performed in which the water vapor generated in the evaporator 4 is adsorbed by the adsorbent 10 of the first adsorption unit 1. The adsorbent 1 of the second adsorption unit 5
Since the desorption operation for desorbing the water that has been adsorbed with 0 is executed, and the series of operations for supplying the water condensed by the condenser 3 to the evaporator 4 through the receiver 7 are executed at the same time. The cooling action on the blown air by 4 can be continued.

Now, when the adsorption operation by the first adsorption unit 1 proceeds as described above, the cooling medium radiator 1
Regardless of the cooling by 4, the adsorbent 10 of the first adsorption unit 1 is in an adsorbed state and the adsorbing ability is lowered, and accordingly, the cooling ability of the evaporator 4 is lowered. On the other hand, in the second adsorption unit 5, the adsorbent 10 is in the desorption completion state due to the progress of the desorption operation, and accordingly, the amount of water supplied from the condenser 3 to the evaporator 4 decreases.

Therefore, the control device 20 switches the three-way valves 2 and 6 after a lapse of a predetermined time from the start of the cooling operation so that the second adsorption unit 5 and the evaporator 4 are communicated with each other and the first The adsorption unit 1 and the condenser 3 are communicated with each other, and the three-way valves 12 and 15 are switched to supply the cooling water of the water jacket 11a to the first adsorption unit 1 and the cooling water of the cooling medium radiator 14. Is supplied to the second adsorption unit 5.

As a result of the above control, the first adsorption unit 1 for the adsorption operation is switched to the desorption operation, and the second adsorption unit 5 for the desorption operation is switched to the adsorption operation. Since the second adsorption unit 5 adsorbs the water vapor from the evaporator 4 and the first adsorption unit 1 supplies the desorbed water vapor to the condenser 3, the cooling capacity of the evaporator 14 can be continued.

By the way, when the engine 11 is started from a stopped state for a long time, or when the engine 11 is idling, the engine 11 continues to have a low heat capacity. Therefore, the engine 1 with a low heat capacity
Since the cooling water from the water jacket 11a heated by 1 is supplied to the adsorption unit for desorption operation, the adsorption unit for desorption operation is cooled conversely and the adsorbent 10 of the adsorption unit is regenerated. Will be difficult.

Therefore, when executing the cooling operation, the control device 20 detects the outlet temperature of the water jacket 11a by the temperature sensor 17 and the temperature sensor 18 of the heating medium circulation path 13 from the adsorption units 1, 5. Detect the outlet temperature.

Then, the controller 20 switches the three-way valve 12 during the heating capacity lowering period in which the temperature of the cooling water in the water jacket 11a is lower than the outlet temperature of the heating medium circulation path 13 to switch the water jacket 11 and the adsorption operation. Of the first adsorption unit 1 of the heating medium circulation path 1
Connect through 3. At this time, the control device 20 disconnects the heat transfer connection between the cooling medium radiator 14 and the first adsorption unit 1 by stopping the pump 25.

In this case, the adsorbent 10 stored in the first adsorption unit 1 is cooled by the cooling water of the engine, so that the adsorbent 10 can exhibit its adsorbing capacity during adsorbing operation and It is possible to raise the temperature of the cooling water.

As a result of the above control, the water jacket 1
The cooling water from 1a is heated not only by the exhaust heat of the engine 11 but also by the adsorption heat of the adsorbent 10 housed in the first adsorption unit 1 for adsorption operation. The temperature rise can be accelerated.

When the temperature of the cooling water from the water jacket 11a exceeds the temperature of the cooling water from the first adsorption unit 1 for adsorption operation, the controller 20 causes the three-way valve 1 to operate.
By switching 2 the cooling water from the water jacket 11a is supplied to the second adsorption unit 5 for desorption operation. As a result, the adsorbent 10 of the second adsorption unit 5 for desorption operation is heated by the cooling water from the water jacket 11a and desorbs water vapor, so that water is supplied from the condenser 3 to the evaporator 4. Thus, the cooling capacity of the evaporator 4 can be exerted.

At this time, since the control device 20 drives the pump 25, the radiator 14 for the cooling medium and the first adsorption unit 1 are thermally conductively connected to each other, whereby the first adsorption unit 1 is connected. The stored adsorbent 10 can be efficiently cooled.

According to the above construction, the cooling water from the water jacket 11a has a temperature lower than the temperature of the adsorption units 1 and 5 for adsorption operation. , 5 so that the temperature of the cooling water for heating the adsorbent is increased by increasing the idling speed of the engine, compared with the conventional example in which the temperature of the cooling water for heating the adsorbent is increased. The temperature rise of the cooling water can be promoted to sufficiently regenerate the adsorbent 10 of the adsorption units 1 and 5 for desorption operation.

Further, even if the temperature of the cooling water drops during idling of the engine, the temperature of the cooling water of the engine is heated by the adsorption units 1 and 5 for the adsorption operation. It is not necessary to unnecessarily increase the idling speed of the vehicle and it is possible to prevent the fuel consumption from deteriorating.

FIG. 2 shows a second embodiment of the present invention,
The same parts as those in the first embodiment are designated by the same reference numerals, and the description thereof will be omitted. Only different parts will be described. In FIG. 2, the cooling medium circulation path 16 of the first and second adsorption units 1 and 5 is connected to the cooling medium radiator 14 and the water jacket 11a via three-way valves 21 and 22.
When the three-way valves 21 and 22 are switched as shown in the figure, the water jacket 11a and the first adsorption unit 1 are connected by a parallel passage of the heating medium circulation passage 13 and the cooling medium circulation passage 16. It

In the case of the second embodiment, the three-way valve 2
By switching between 1 and 22, for example, in the first adsorption unit 1 for adsorption operation, engine cooling water circulates through the cooling medium circulation passage 16 in addition to the heating medium circulation passage 13 with the water jacket 11a. Compared with the first embodiment, the cooling water of the engine can be heated by the entire first adsorption unit 1 for the adsorption operation, so that the temperature rise of the cooling water of the engine can be further promoted.

FIG. 3 shows a third embodiment of the present invention,
The same parts as those in the second embodiment are designated by the same reference numerals and the description thereof will be omitted. In FIG. 3, the cooling medium circulation path 16 of the first and second adsorption units 1 and 5 is connected to the water jacket 11a via the three-way valves 21 and 22 and the three-way valves 23 and 24, and the three-way valve 12 is Is connected to the heating medium circulation path 13 via each of the three-way valves 12, 15, 21-
When 24 is switched as shown in the figure, the water jacket 11a and the first adsorption unit 1 are connected through the cooling water circulation passage 16 and the heating medium circulation passage 13 in series.

According to this third embodiment, the three-way valves 12, 1
In the first adsorption unit 1 for adsorption operation by switching between 5, 21 and 24, the cooling water of the engine circulates through the cooling medium circulation path 16 and the heating medium circulation path 13 of the adsorption unit 1, so the second embodiment Similar to the above, the cooling water of the engine can be heated by the entire first adsorption unit 1 for the adsorption operation, and thus the temperature rise of the cooling water of the engine can be further promoted.

The present invention is not limited to the above embodiment, but can be modified or expanded as follows. As a means for detecting the temperature of the adsorption unit, the direct temperature of the adsorbent 10 may be detected. Instead of the radiator 14 for the cooling medium, the adsorption unit 1 or 5 for the adsorption operation may be cooled by the air blown by a fan or the inflow air by the traveling of the vehicle. The accumulator 7 and the pump 8 may be omitted. It may be applied to an air conditioner for home use and an electric heater may be used as a heating source.

[Brief description of drawings]

FIG. 1 is an overall schematic view showing a first embodiment of the present invention.

FIG. 2 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 3 is a view corresponding to FIG. 1 showing a third embodiment of the present invention.

[Explanation of symbols]

1 is the first adsorption unit, 2 is a three-way valve, 3 is a condenser, 4
Is an evaporator, 5 is a second adsorption unit, 6 is a three-way valve, 10
Is an adsorbent, 11 is an engine (internal combustion engine), 11a is a water jacket (heating source), 12 is a three-way valve, 13 is a heating medium circulation path, 14 is a cooling medium radiator, and 15 is a three-way valve,
16 is a cooling medium circulation path, 17 and 18 are temperature sensors, 19
Is an arithmetic unit, 20 is a control device, 21 to 24 are three-way valves, and 25 is a pump.

Claims (5)

(57) [Claims] 1. A plurality of adsorption units containing an adsorbent that adsorbs a vapor phase refrigerant in a low temperature state and desorbs the vapor phase refrigerant in a high temperature state, and an evaporator that flows out the vapor phase refrigerant to an adsorption unit for adsorption operation. A condenser for condensing the vapor-phase refrigerant flowing from the adsorption / desorption operation unit into a refrigerant and giving it to the evaporator; cooling means for cooling the adsorption unit for adsorption operation; and an adsorption unit for desorption operation. A heating source forming a heating medium circulation path through which a heating medium passes, and a heating capacity lowering period in which the temperature of the heating source is lower than the temperature of the adsorption unit for adsorption operation, the adsorption unit and the heating source are An adsorbing type refrigerating apparatus, comprising: a switching unit that is heat-conductively connected through the heating medium circulation path. 2. The adsorption type refrigerating apparatus according to claim 1, wherein the cooling means stops the cooling operation during the heating capacity lowering period. 3. The cooling means is constituted by a radiator for a cooling medium that forms a cooling medium circulation path through which a cooling medium passes between the cooling means and an adsorption unit for adsorption operation. Or the adsorption type refrigerating apparatus according to 2. 4. The switching means thermally connects the adsorption unit for adsorption operation and the heating source through the cooling medium circulation path in addition to the heating medium circulation path during the heating capacity lowering period. The adsorption type refrigerating apparatus according to claim 3, wherein 5. The adsorption refrigeration apparatus according to claim 1, wherein the heating source is configured to be heated by exhaust heat of an internal combustion engine, and the evaporator is installed in a room. An adsorption type air conditioner configured to cool the blown air.