JPH0961001A - Adsorption-cooling apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To achieve a cooled-down effect in operation without enlarging the main adsorption device or increasing the number of the main adsorption devices in use. SOLUTION: In the initial stage following the start of the cooling operation a first main adsorption device 1 or a second main adsorption device 2, functioning as the one on the desorption side, communicates with an auxiliary adsorption device 15. Since, in such a stage, vaporized refrigerant desorbed by the main adsorption device on the desorption side is adsorbed by an adsorbent 20 in the auxiliary adsorption device 15, the rate at which the refrigerant is adsorbed by the adsorbent 20 decreases below the ordinary state in which the desorbed vaporized refrigerant is supplied to a condenser 10. Next, when the main adsorption device on the desorption side is switched to the adsorption side, the low rate of adsorption of the adsorbent causes the vaporized refrigerant to be adsorbed in a larger quantity from a vaporizer 12, which phenomenon means accelerating the vaporization of the liquid refrigerant in the vaporizer 12, hence possibility of a cooled-down effect in operation by cooling at an increased cooling capacity of the vaporizer 12.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption type cooling device having a main adsorber for adsorbing / desorbing a refrigerant, and more particularly to an adsorbing type cooling device capable of coping with the case where a high cooling capacity is required.

[0002]

2. Description of the Related Art An adsorption cooling device is provided with two adsorbers containing an adsorbent that adsorbs and desorbs a refrigerant. The adsorbers are connected to the condenser and the evaporator so that the refrigerant flows in one direction and circulates, and when one of the adsorbers performs the desorption operation, the other performs the adsorption operation. The desorption operation and the adsorption operation are alternately repeated.

Unlike the compression type cooling device, such an adsorption type cooling device does not need to use a CFC gas that may destroy the ozone layer as a refrigerant, and does not need to use an engine output. It is considered to be used as a cooling device for car air conditioners. In this case, a heating medium and a cooling medium for heating or cooling the adsorbent are necessary for the adsorber to perform the desorption operation and the adsorption operation, but in the car air conditioner, heating for the desorption operation is required. Engine cooling water is used as a medium.

By the way, in the adsorption type cooling device, its cooling capacity depends on the evaporation amount of the liquid refrigerant in the evaporator. The evaporation amount of the liquid refrigerant in the evaporator is determined by the refrigerant adsorption amount of the adsorbent within a fixed time from the start to the end of the adsorption operation of the adsorber. And the refrigerant adsorption rate at the end. Therefore,
Since the refrigerant adsorption rate of the adsorbent at the end of the adsorption operation is constant, lowering the refrigerant adsorption rate at the start of the adsorption operation leads to higher cooling capacity.
It is preferable to desorb as much refrigerant as possible during the desorption operation to reduce the refrigerant adsorption rate of the adsorbent at the end of the desorption operation.

In the adsorption type cooling device disclosed in Japanese Unexamined Patent Publication No. 5-133638, at the time of idling immediately after the start of the engine of the automobile, the engine cooling water is still cooled and the desorption amount of the refrigerant from the adsorbent is small (refrigerant suction). Adsorption rate is high), and the amount of refrigerant adsorbed at the time of adsorbing operation next decreases, and only a low cooling capacity can be obtained.Therefore, in order to eliminate such a state early, during idling operation,
It is described that by slightly increasing the fuel consumption of the engine through the idle-up device, the temperature of the engine cooling water can be raised quickly and the adsorbent desorption capacity can be enhanced early.

[0006]

In a car air conditioner, for example, when a car parked under the scorching sun is run, in order to cool the interior of the car rapidly, the cooling capacity of the evaporator is increased to operate (cool). It is necessary to drive down).

However, in the conventional adsorption type cooling device, in order to cope with the case where the above high cooling capacity is required, the cooling operation is continued even if the request is temporary. In order to do so, it is necessary to increase the amount of adsorbent by increasing the size of the adsorber that repeats the adsorption operation and desorption operation alternately, or by increasing the number of these adsorbers. The sex becomes worse.

The adsorption cooling device described in Japanese Patent Laid-Open No. 5-133638 described above increases the fuel consumption amount during idling operation of the engine and accelerates the temperature rise of the engine cooling water, thereby desorbing the adsorbent. Since it is designed to bring the vehicle into a normal state at an early stage, not only the demand for cool-down driving can be dealt with but also the fuel efficiency of the vehicle is deteriorated.

The present invention has been made in view of the above circumstances, and an object thereof is to enlarge an adsorber in which desorption operation and adsorption operation are alternately repeated for cooling operation, or to increase the number thereof. Even without doing so, it is an object of the present invention to provide an adsorption type cooling device that can make an evaporator exhibit a high cooling capacity at the beginning of the cooling operation.

[0010]

The first means (claim 1) of the present invention for achieving the above object comprises at least two main adsorbers containing an adsorbent, and the main adsorbers are provided. Are configured to alternately perform desorption operation and adsorption operation, the vapor refrigerant desorbed from the desorption side main adsorber is condensed by the condenser and evaporated by the evaporator, and then adsorbed by the other main adsorber. In the adsorption-type cooling device that performs the cooling operation by the above, an auxiliary adsorber containing an adsorbent is provided, and at the start of the cooling operation, the auxiliary adsorber is the main adsorber that performs the desorption operation of the main adsorbers. It is characterized in that the vapor refrigerant, which is in communication with the main adsorber and is desorbed from the main adsorber, is adsorbed to the auxiliary adsorber.

According to the first means, since the main adsorber on the desorption side is communicated with the auxiliary adsorber at the start of the cooling operation, the desorption of the refrigerant of the adsorbent of the main adsorber is promoted and the refrigerant adsorption rate is increased. Is lower than usual. Therefore, when the adsorption operation is performed next time, a larger amount of the refrigerant is adsorbed from the evaporator.

The second means of the present invention for achieving the above object (claim 3) is to provide at least two main adsorbers containing an adsorbent, and the main adsorbers are alternately desorbed. The cooling operation is configured by performing the operation and the adsorption operation, and the vapor refrigerant desorbed from the desorption side main adsorber is condensed by the condenser and evaporated by the evaporator, and then adsorbed by the other main adsorber. In the adsorption cooling device for performing the above, an auxiliary adsorber containing an adsorbent is provided, and when the cooling operation is stopped, the auxiliary adsorber is connected to at least the main adsorber that has performed the desorption operation among the main adsorbers. It is characterized in that the vapor refrigerant of the main adsorber is adsorbed to the auxiliary adsorber.

According to the second means, the main adsorber which has performed the desorption operation is communicated with the auxiliary adsorber, and the refrigerant adsorbed by the adsorbent is adsorbed by the adsorbent of the auxiliary adsorber to adsorb the refrigerant. Since the rate becomes even lower, the amount of refrigerant adsorbed from the evaporator increases when the adsorption operation is performed at the start of the next cooling operation.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION A first embodiment in which the present invention is applied to a cooling device for an automobile air conditioner will be described below with reference to FIGS. As shown in FIG. 1, the adsorption cooling device is provided with first and second main adsorbers 1 and 2. These main adsorbers 1 and 2 are configured by filling a hollow container with adsorbents 3 and 4 that adsorb and desorb a refrigerant. Here, water having a large latent heat is used as the refrigerant. Further, as the refrigerant adsorbent, silica gel, zeolite, activated carbon,
Although there are activated alumina and the like, silica gel is used as the adsorbents 3 and 4 in this embodiment.

Inside the first and second main adsorbers 1 and 2, there are provided heating pipes 5 and 6 constituting a heat exchanger for heating as a heating means, and cooling as a cooling means. Are provided with cooling pipes 7 and 8 constituting a heat exchanger for a vehicle, cooling water of the engine is supplied to the heating pipes 5 and 6 as a heating medium, and the cooling pipes 7 and 8 are cooled by the air outside the vehicle. The water from is supplied as a cooling medium.

Then, the first and second main adsorbers 1 and 2
Among them, when one performs the desorption operation, the other performs the adsorption operation, the heating pipe 5 and the cooling pipe 7 of the first main adsorber 1 and the heating pipe 6 and the cooling pipe 8 of the second main adsorber 2. Is configured so that engine cooling water that is a heating medium and cold water that is a cooling medium are selectively and alternately supplied.

The first and second main adsorbers 1 and 2 have two
One outlet 1a, 1b and 2a, 2b and one inlet 1c and 2c are provided. Of these, exits 1a and 2b
Is an inlet 9 of an outflow side three-way switching valve 9 as a flow path switching means.
The outlet 9c of the three-way switching valve 9 is connected to the evaporator 12 via the condenser 10 and the check valve 11 in that order. The evaporator 12 is connected to the inlet 13a of the inflow side three-way switching valve 13 as a flow path switching means, and the outlets 13b and 13c of the three-way switching valve 13 are connected to the first and second main adsorbers 1 and 2. It is connected to the inlets 1c and 2c.

Now, the remaining inlets 1b and 2b of the first and second main adsorbers 1 and 2 are connected to the inlets 14a and 14b of the auxiliary side three-way switching valve 14 as a flow path switching means, and these three-way switching valves are connected. The outlet 14c of 14 is connected to the inlet 15a of the auxiliary adsorber 15. The auxiliary adsorber 15 has two outlets 15b and 15c, one outlet 15b is connected to the condenser 10 through the check valve 16 and the on-off valve 17 in order, and the other outlet 15c is on-off valve 18. And the check valve 19 in this order and connected to the evaporator 12.

Like the first and second main adsorbers 1 and 2, the auxiliary adsorber 15 has a hollow container filled with an adsorbent 20 for adsorbing and desorbing a refrigerant. in this case,
The adsorbent 20 of the auxiliary adsorber 15 has a larger adsorption capacity than the adsorbents 3 and 4 made of silica gel of the first and second main adsorbers 1 and 2 in order to reduce the size of the auxiliary adsorber 15. Agents such as zeolites are used.

Further, an exhaust gas pipe 21 which constitutes a heating heat exchanger as a heating means is provided in the auxiliary adsorber 15, and a cooling pipe 22 which constitutes a cooling heat exchanger as a cooling means. Is provided. Here, the exhaust gas pipe 21 is connected to a bypass pipe (not shown) branched from the exhaust pipe of the engine so that the engine exhaust gas as a heating medium flows. Further, like the cooling pipes 7 and 8 of the main adsorbers 1 and 2, water is supplied to the cooling pipe 22 from a tank cooled by the air outside the vehicle as a cooling medium.

The reason why the auxiliary adsorber 15 is heated by the engine exhaust gas is that the adsorbent 20 is zeolite.
Although it has better adsorbability than silica gel, it requires a higher temperature than silica gel to desorb the adsorbed refrigerant, so engine exhaust gas is used instead of engine cooling water. It should be noted that the exhaust gas pipe 21 may be a heating fluid that has exchanged heat with the exhaust gas of the engine and its flow path instead of the bypass pipe.

Next, the operation of the above configuration will be described. Now, the engine is just starting and the engine cooling water is kept at a low temperature.
If the car air conditioner switch is turned on in this state, the first
And, one of the second main adsorbers 1 and 2 is set to be the adsorption side and the other is the desorption side, and the cooling operation is started. In this case, of the first and second main adsorbers 1 and 2, the desorption side at the end of the previous cooling operation becomes the adsorption side at the start of the current cooling operation, and the adsorption side at the end of the previous cooling operation. The one that was on the side is set to become the desorption side at the start of the current cooling operation. Here, which of the desorption side and the adsorption side at the end of the previous cooling operation is stored in the memory of the control device (not shown), and the control device determines whether the first and second main units are based on the stored contents of the memory. One of the adsorbers 1 and 2 is set on the adsorption side and the other is set on the desorption side.

During the cooling operation, the first and second main adsorbers 1
And 2 are alternately switched to the adsorption side and the desorption side. The desorption side main adsorber is normally communicated with the condenser 10, but at the beginning of the cooling operation, the main adsorber is communicated with the auxiliary adsorber 15 in a state where the communication with the condenser 10 is cut off.

By the start of the cooling operation, first of all,
It is assumed that the main adsorber 1 is set to the adsorption side and the second main adsorber 2 is set to the desorption side. Then, as shown in FIG. 1, the inflow side three-way switching valve 13 operates so as to communicate the inlet 13a and the outlet 13b to communicate the first adsorption unit 1 on the adsorption side with the evaporator 12, and Cold water is supplied to the cooling pipe 7 of the main adsorber 1.

Further, the auxiliary side three-way switching valve 14 has an inlet 14b.
And the outlet 14c so as to communicate with each other, and the second side on the detachable side
The outlet 2b of the main adsorber 2 is communicated with the auxiliary adsorber 15, and the high temperature engine cooling water is supplied to the heating pipe 8 of the second main adsorber 2. At this time, the outflow side three-way switching valve 9 is in the fully closed state, and the first side of the adsorption side with respect to the condenser 10 is located.
Not only the adsorber 1 but also the second main adsorber 2 on the desorption side is shut off.

From the above, the adsorbent 3 of the first main adsorber 1
Is cooled by cold water and adsorbs the vapor refrigerant, so that the pressure in the evaporator 12 decreases. As a result, the liquid refrigerant previously stored in the evaporator 12 is evaporated, and the latent heat at that time cools the air sent to the vehicle interior. And
The refrigerant evaporated in the evaporator 12 is adsorbed by the adsorbent 3 of the first main adsorber 1, and the latent heat released from the vapor refrigerant during this adsorption is taken away by the cold water flowing in the cooling pipe 7.

On the other hand, in the second main adsorber 2, the refrigerant is desorbed from the adsorbent 4 by communicating with the auxiliary adsorbed gas 15, and the desorbed vapor refrigerant is adsorbed on the adsorbent 18 of the auxiliary adsorber 15. Adsorbed. The latent heat released from the vapor refrigerant during this adsorption is taken away by the cold water flowing through the cooling pipe 22.

When the adsorbent 3 of the first main adsorber 1 completes the adsorption and the adsorbent 4 of the second main adsorber 2 completes the desorption, the second main adsorber 2 becomes the first on the adsorption side. 1 main adsorber 1
2, the inflow side three-way switching valve 13 is switched to operate so that the inlet 13a and the outlet 13c communicate with each other and the second main adsorber 2 is operated.
Is connected to the evaporator 12, and the auxiliary side three-way switching valve 1
4 operates to switch so that the inlet 14a and the outlet 14c communicate with each other to communicate the first main adsorber 1 with the auxiliary adsorber 15. Further, high-temperature engine cooling water is supplied to the heating pipe 5 of the first main adsorber 1 and the second main adsorber 2
Cold water is supplied to the cooling pipe section 8.

As a result, the second main adsorber 2 now adsorbs the vapor refrigerant and the liquid refrigerant accumulated in the evaporator 12 is continuously evaporated, and at the same time, the first main adsorber 1 The desorbed vapor refrigerant comes to be adsorbed by the adsorbent 20 of the auxiliary adsorber 15. When the second main adsorber 2 completes the adsorption and the first main adsorber 1 completes the desorption, the first main adsorber 1 is on the adsorption side in the same manner as described above. The main adsorber 2 is switched to the desorption side.

Thus, at the beginning of the cooling operation, the desorption side of the first and second main adsorbers 1 and 2 is communicated with the auxiliary adsorber 15. The alternating communication of the first and second main adsorbers 1 and 2 with respect to the auxiliary adsorber 15 is performed until the adsorbent 20 of the auxiliary adsorber 15 rises to a predetermined refrigerant adsorption rate. The above-mentioned predetermined adsorption rate means, for example, the adsorption rate at the time when the internal pressure of the auxiliary adsorber 15 becomes equal to the internal pressure of the condenser 10.

By the way, the refrigerant adsorption rate of the adsorbents 3 and 4 is
During the adsorption operation, it depends on the temperature of the cold water supplied to the cooling pipes 7 and 8, and during the desorption operation, it depends on the temperature of the engine cooling water. Now, assuming that the adsorbents 3 and 4 have the adsorption rate shown by A in FIG. 4 at the start of the desorption operation, the adsorption rate gradually decreases as the desorption progresses, but the desorption side main adsorber is replaced by the condenser 10. In the normal state of communication, the refrigerant adsorption rate of the adsorbents 3 and 4 upon completion of desorption depends on the temperature of the engine cooling water that is the heating medium, and therefore the adsorption rate shown by B in FIG.

However, at the beginning of the cooling operation, the main adsorber on the desorption side as described above is communicated with the auxiliary adsorber 15, and the vapor refrigerant desorbed from the adsorbents 3 and 4 is adsorbed by the auxiliary adsorber 15. Since it is adsorbed by the agent 18, the adsorption rate of the adsorbents 3 and 4 at the end of the desorption operation is much lower than in the normal state, and the adsorption rate shown by C in FIG. 4 is low. Since the cooling capacity of the evaporator 12 is determined by the difference in the adsorption rate between the start and end of the adsorption operation of the adsorbents 3 and 4, as described above, the adsorbent 2 of the auxiliary adsorber 15 is
Adsorbents 3 and 4 whose refrigerant adsorption rate is further reduced by 0
Causes the evaporator 12 to exert a greater cooling capacity.

Therefore, during the desorption operation, the adsorbents 3 and 4 which are communicated with the auxiliary adsorber 15 and whose adsorption rate is further reduced,
At the time of the next adsorption operation, a larger amount of vapor refrigerant is adsorbed from the evaporator 12, and the evaporator 12 has a large cooling capacity to cool the air blown into the vehicle interior (cool-down operation). Therefore, at the beginning of the operation of the car cooler, the temperature of the air sent into the vehicle compartment through the evaporator 12 is high, and the evaporator 12
Even if the thermal load is heavy, it exerts a large cooling capacity to cool the passenger compartment rapidly.

If the adsorbent 20 of the auxiliary adsorber 15 rises to a predetermined adsorption rate in the state of FIG. 2, the next switching state shown in FIG. The first main adsorber 1 switched to the above is communicated with the evaporator 12 by the inflow side three-way switching valve 13, and
The second main adsorber 2 switched to the desorption side is connected to the condenser 10 by the outflow side three-way switching valve 9. In addition, cold water is supplied to the cooling pipe 7 of the first main adsorber 1, and
Hot engine cooling water is supplied to the heating pipe 6 of the second main adsorber 2.

On the other hand, the auxiliary three-way switching valve 14 is fully closed to cut off the communication between the auxiliary adsorber 15 and the first and second main adsorbers 1 and 2, and the on-off valve 17 is opened instead. The auxiliary adsorber 15 is connected to the condenser 10, and the engine exhaust gas is supplied to the exhaust gas pipe 21 of the auxiliary adsorber 15.

The adsorbent 3 in the first main adsorber 1 is heated by high-temperature engine cooling water to desorb the vapor refrigerant, and the desorbed vapor refrigerant is supplied to the condenser 10. Further, the adsorbent 18 in the auxiliary adsorber 15 is heated by the engine exhaust gas to desorb the vapor refrigerant, and the desorbed vapor refrigerant is supplied to the condenser 10, where the first main adsorber 1
It is condensed with the vapor refrigerant supplied from.

The refrigerant condensed in the condenser 10 is supplied to the check valve 1
It is supplied to the evaporator 12 via 1 and evaporates while being stored in the evaporator 12 and exhibits a cooling effect. And the first
When the main adsorber 1 completes the desorption and the second main adsorber 2 completes the adsorption, next, the first main adsorber 1 is on the adsorption side and the second main adsorber 2 is on the desorption side. Then, the first and second main adsorbers 1 and 2 are switched so that they are alternately on the adsorption side and the desorption side.
And to the condenser 10.

When the thermal load on the evaporator 12 is reduced, the on-off valve 17 is closed and the on-off valve 18 is opened to directly supply the vapor refrigerant desorbed by the auxiliary adsorber 15 to the evaporator 12. The state is set, or the open / close valve 18 is opened while the open / close valve 17 is open, so that the vapor refrigerant desorbed in the auxiliary adsorber 15 is supplied to the condenser 10 and the evaporator 12. Then, by desorbing the refrigerant adsorbed by the adsorbent 20 of the auxiliary adsorber 15 in this manner, the refrigerant can be adsorbed from the first and second main adsorbers 1 and 2 at the start of the next cooling operation. To do.

As described above, according to the present embodiment, the refrigerant desorbed from the first and second main adsorbers 1 and 2 at the beginning of the cooling operation is adsorbed to the auxiliary adsorber 15 so that the first and second refrigerants are adsorbed. Since the adsorption rates of the adsorbents 3 and 4 of the main adsorbers 1 and 2 of 2 can be made lower than usual, the cooling operation in which the evaporator 12 is required to exhibit a high cooling capacity (cool down operation) At the beginning, the request can be addressed.

Moreover, in response to a temporary cool-down operation request, the first and second main adsorbers 1 and 2 for operation in which the desorption operation and the adsorption operation are alternately repeated to continue the cooling operation are enlarged. Since it is possible to deal with the problem without increasing the number, it is possible to avoid an increase in the size of the adsorption cooling device as a whole and it is excellent in vehicle mountability.

FIG. 5 shows a second embodiment of the present invention.
The difference from the first embodiment is that the auxiliary adsorber 1 is designed so that the cold engine cooling water warms up quickly when the car air conditioner is turned on at the same time when the engine is started.
When the adsorbent 20 of 5 adsorbs the vapor refrigerant, the engine cooling water is heated by the latent heat released from the vapor refrigerant.

That is, the auxiliary adsorber 15 is provided with a heat receiving pipe 23 which constitutes a heat exchanger for the adsorbent 20 and the engine cooling water, and supplies cold water to the cooling pipe 22 when the engine is started. Heat receiving pipe 23 in the state of being refused
Is configured to be supplied with engine cooling water.

However, when the switch of the car air conditioner is turned on at the same time as the start of the engine and the cooling operation of the adsorption cooling device is started, the initial operation is the same as the above-mentioned first and second operations. Of the main adsorbers 1 and 2, the main adsorber on the desorption side is communicated with the auxiliary adsorber 15.

Now, as shown in FIG. 4, the second main adsorber 2
Is the desorption side and is communicated with the auxiliary adsorber 15 via the auxiliary three-way switching valve 14, the adsorbent 20 of the auxiliary adsorber 15 adsorbs the vapor refrigerant in the second main adsorber 2. As a result, the internal pressure of the second main adsorber 2 decreases, so that the vapor refrigerant is desorbed from the adsorbent 4, and the desorbed vapor refrigerant is adsorbed by the adsorbent 20. Then, when the adsorbent 20 adsorbs the vapor refrigerant, the engine cooling water flowing through the heat receiving pipe 23 is heated by the latent heat of the refrigerant.

When the first main adsorber 1 is switched to the desorption side and the second main adsorber 2 is switched to the adsorption side, the adsorbent 3 of the first main adsorber 2 is likewise changed to the vapor refrigerant. Is desorbed, and the latent heat when the vapor refrigerant is adsorbed by the adsorbent 20 heats the engine cooling water flowing through the heat receiving pipe 23. When the engine cooling water rises to a predetermined temperature, the supply of engine cooling water to the heat receiving pipe 23 is stopped and the cooling water is supplied to the cooling pipe 22.

When the refrigerant vapor desorbed from the desorption side main adsorber in this way is adsorbed by the adsorbent 20, the latent heat of the refrigerant heats the engine cooling water flowing through the heat receiving pipe 23. For this reason, the engine cooling water starts to warm up early, and the first main adsorber 1 or the second main adsorber 2 is heated.
When it becomes the desorption side, the adsorbents 3 and 4 are heated early by the engine cooling water supplied to the heating pipes 5 or 6, and a sufficient desorption operation is performed early. Therefore, the adsorbents 3 and 4 of the first and second main adsorbers 1 and 2 are
Along with the fact that a sufficient desorption operation is performed early from the engine start time and the desorption is promoted by the adsorption action of the adsorbent 20 of the auxiliary adsorber 15, the adsorption rate is lower than in the normal state. To do.

From the above, even if the car air conditioner is turned on at the same time when the engine is started, the evaporator 12 exhibits a high cooling capacity, and it is possible to meet the demand for the cool-down operation at the initial stage of the cooling operation. Moreover, since the engine cooling water that is cold at the time of starting the engine is heated by the latent heat when the adsorbent 20 of the auxiliary adsorber 15 adsorbs the vapor refrigerant, it is not necessary to increase the fuel consumption of the engine, and unnecessary fuel consumption is required. Can be eliminated.

FIG. 6 shows a third embodiment of the present invention.
The difference from the first embodiment is that after the cooling operation is stopped, the adsorption rates of the adsorbents 3 and 4 of the first and second main adsorbers 1 and 2 are lowered, and the cooling at the beginning of the cooling operation to be performed next is started. It's just in preparation for down driving.

That is, when the switch of the car air conditioner is turned off and the cooling operation of the adsorption type cooling device is stopped, as shown in FIG. 6, the auxiliary side three-way switching valve 14 opens the two inlets 14a and 14b from the fully closed state. Both are switched to communicate with the outlet 14c, and both the first and second main adsorbers 1 and 2 are communicated with the auxiliary adsorber 15.

In this state, high temperature engine cooling water is supplied to the heating pipes 5 and 6 of the first and second main adsorbers 1 and 2 to heat the adsorbents 3 and 4. As a result, the refrigerant adsorbed on the adsorbents 4 and 4 is desorbed, and the desorbed vapor refrigerant is adsorbed on the adsorbent 20 of the auxiliary adsorber 15. Therefore, of the first and second main adsorbers 1 and 2, the adsorption rate of the adsorbent of the main adsorber, which was on the desorption side until just before the cooling operation was stopped, further decreases, and also on the adsorption side. The adsorption rate of the adsorbent in the main adsorber also became lower than usual, preparing for the cool-down operation at the beginning of the next cooling operation. In such a cool down standby operation after the cooling operation is stopped, even if the engine is stopped at the same time as the cooling operation is stopped, the engine cooling water remains at a high temperature. It can be performed by heating with cooling water.

The refrigerant adsorbed by the adsorbent 20 of the auxiliary adsorber 15 is desorbed by supplying high-temperature exhaust gas to the exhaust gas pipe 21 during the next cooling operation, and the desorbed vapor refrigerant is As in the embodiment, the heat is supplied to the condenser 10 and the evaporator 12 depending on the thermal load of the condenser 10 or the evaporator 12.

Here, zeolite is used as the adsorbent 20 of the auxiliary adsorber 15. Zeolite has a larger adsorptive power than silica gel used as the adsorbents 3 and 4 of the first and second main adsorbers 1 and 2, so that the first and second main adsorbers 1 and 2 after cooling operation are stopped. Even if 2 is communicated with the auxiliary adsorber 15, the adsorbents 3 and 4 are still adsorbed by the adsorbent 20.
Is sufficiently adsorbed on the desorbed vapor refrigerant and the refrigerant adsorption rate of the adsorbents 3 and 4 can be made lower than usual.

The adsorbent 20 of the auxiliary adsorber 15 includes
Silica gel may be used. Adsorbent 2 of auxiliary adsorber 15
When silica gel is used for 0, when both the first and second main adsorbers 1 and 2 are connected to the auxiliary adsorber 15,
Since the adsorption rate of the adsorbents 3 and 4 cannot be lowered sufficiently, in this case, of the first and second main adsorbers 1 and 2, the main adsorber that was on the adsorption side immediately before the cooling operation was stopped. It suffices to make only the adsorbent 15 communicate with the auxiliary adsorber 15 to reduce the adsorption rate of only the adsorbent in one of the main adsorbers to prepare for the cool-down operation.

Further, in the third embodiment, both the first and second main adsorbers 1 and 2 are made to communicate with the auxiliary adsorber 15 at the same time at the end of the cooling operation, but the first and second main adsorbers 15 are connected. Of the adsorbers 1 and 2, the main adsorber that was on the desorption side immediately before stopping was connected to the auxiliary adsorber 15, and then the main adsorber that was on the adsorbing side immediately before stopping was desorbed with engine cooling water. It may be made to communicate with the auxiliary adsorber 15. Further, just the main adsorber on the desorption side immediately before the stop of the cooling operation may be connected to the auxiliary adsorber.

The present invention is not limited to the embodiment described above and shown in the drawings, but the first and second main adsorbers 1
Zeolites may be used as the adsorbents 3 and 4 of 2 and 2, and a plurality of auxiliary adsorbers 15 may be provided, and various modifications can be made without departing from the scope.

[0056]

As described above, according to the present invention, when the cooling operation is started or stopped, the main adsorber is connected to the auxiliary adsorber to reduce the refrigerant adsorption rate of the adsorbent of the main adsorber. Therefore, the cool-down operation can be performed at the beginning of the cooling operation without increasing the size and the number of the main adsorbers (claims 1 and 3).

Further, when the cooling operation is performed at the same time when the engine is started, the engine cooling water is heated by the latent heat released from the refrigerant when the adsorbent in the auxiliary adsorber adsorbs the vapor refrigerant, so that the engine cooling water is heated. The cooling water can be warmed early (claim 2).

[Brief description of drawings]

FIG. 1 is a configuration diagram showing a first embodiment of the present invention and showing an example of a communication state at the beginning of a cooling operation.

FIG. 2 is a configuration diagram showing a communication state at the beginning of the cooling operation in a state different from that in FIG.

FIG. 3 is a configuration diagram showing an example of a normal communication state.

FIG. 4 is a graph showing changes in adsorption rate due to adsorption / desorption of an adsorbent.

FIG. 5 is a view corresponding to FIG. 1 showing a second embodiment of the present invention.

FIG. 6 is a configuration diagram showing a third embodiment of the present invention and showing a communication state when a cooling operation is stopped.

[Explanation of symbols]

In the figure, 1 and 2 are first and second main adsorbers, 3 and 4 are adsorbents, 5 and 6 are heating pipes, 7 and 8 are cooling pipes, 10 is a condenser, 12 is an evaporator, and 15 is Auxiliary adsorber,
20 is an adsorbent, 21 is an exhaust gas pipe, 22 is a cooling pipe, and 23 is a heat receiving pipe.

Claims (3)

[Claims] 1. A vapor desorbed from the main adsorber on the desorption side, wherein at least two main adsorbers containing an adsorbent are provided, and the main adsorbers are configured to alternately perform desorption and adsorption operations. In an adsorption type cooling device that performs cooling operation by condensing the refrigerant in a condenser and evaporating it in the evaporator, then adsorbing it to the other main adsorber, an auxiliary adsorber containing an adsorbent is provided to perform cooling operation. At the start of, the auxiliary adsorber is connected to a main adsorber of the main adsorber that performs desorption operation, and the vapor refrigerant desorbed by the main adsorber is adsorbed to the auxiliary adsorber. Adsorption cooling device. 2. The auxiliary adsorber mounted on a vehicle is configured to be capable of exchanging heat with engine cooling water, and the auxiliary adsorber is cooled by the engine cooling water when the engine is started during adsorption operation. The adsorption cooling device according to claim 1, wherein the adsorption cooling device is provided. 3. A vapor which is desorbed from the main adsorber on the desorption side, wherein at least two main adsorbers containing an adsorbent are provided, and the main adsorbers are configured to alternately perform desorption operation and adsorption operation. In an adsorption type cooling device that performs cooling operation by condensing the refrigerant in a condenser and evaporating it in the evaporator, then adsorbing it to the other main adsorber, an auxiliary adsorber containing an adsorbent is provided to perform cooling operation. The auxiliary adsorber is connected to at least the desorbing main adsorber of the main adsorber and the vapor refrigerant of the main adsorber is adsorbed to the auxiliary adsorber when Adsorption cooling device.