JPH07253257A - Adsorption type refrigerating apparatus - Google Patents

Abstract

PURPOSE:To eliminate the possibility of causing a problem in that supplying of a refrigerant liquid to an evaporator is insufficient and the refrigerant liquid is collected in the evaporator, even when heat load is large in an evaporator. CONSTITUTION:When the temperature detected by a temperature sensor 77 of an evaporator 64 is higher than a temperature detected by a temperature sensor 76 of a condenser 58, a solenoid opening and closing valve 75 of a communicating pipe 74 is opened. Then a refrigerant vapor having evaporated in the evaporator 64 flows into the condenser 58 through the communicating pipe 74 to be again condensed. Accordingly, even when a large quantity of refrigerant liquid is supplied to the evaporator 64, it evaporates wholly, and a receiver 60 will not run short of the refrigerant liquid.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adsorption type refrigerating apparatus equipped with an adsorbing / desorbing device for adsorbing / desorbing a refrigerant, and more particularly, to a refrigerant liquid for the evaporator when the thermal load of the evaporator is large. The present invention relates to an adsorption type refrigerating device which is designed to eliminate supply shortage.

[0002]

2. Description of the Related Art As a conventional adsorption type refrigerating apparatus, for example, there is one shown in Japanese Utility Model Laid-Open No. 5-42966. The same publication exemplifies the one used for air conditioning, and this will be described with reference to FIG. 4. In this adsorption type refrigerating apparatus, first and second adsorbents 1 and 2 filled with adsorbents are provided. Sucking
The desorption devices 3 and 4 are provided. When the refrigerant vapor is desorbed by the first adsorber / desorber 3 and the refrigerant vapor is adsorbed by the second adsorber / desorber 4, the heating fluid is supplied to the supply pipe 5, the three-way switching valve 6, and the first A heat exchanger 7 provided in the adsorption / desorption device 3,
The cooling fluid is discharged from the discharge pipe 9 via the three-way switching valve 8, and the cooling fluid is supplied to the supply pipe 10, the three-way switching valve 11, and the second pipe.
It is discharged from the discharge pipe 14 through the heat exchanger 12 and the three-way switching valve 13 provided in the suction / desorption device 4.

When the heating fluid flows through the heat exchanger 7, the adsorbent 1 in the first adsorption / desorption device 3 is heated, and the refrigerant adsorbed by the adsorbent 1 is evaporated and desorbed. This refrigerant vapor enters the condenser 16 via the three-way switching valve 15, where it is branched from the supply pipe 10 and exchanges heat with the cooling fluid flowing to the discharge pipe 14 via the condenser 16 to condense and become the refrigerant liquid. Become. The refrigerant liquid flowing out from the condenser 16 is the receiver 1
After being temporarily stored in the evaporator 7, the evaporator 1 is pumped by the pump 18.
9, the room air is cooled to evaporate and vaporize. This refrigerant vapor is passed through the three-way switching valve 20 to the second
The adsorbing / desorbing device 4 enters and is adsorbed by the adsorbent 2. The heat generated during the adsorption of the refrigerant vapor is taken away by the cooling fluid flowing through the heat exchanger 12.

By the above operation, when a predetermined amount of refrigerant is desorbed from the adsorbent 1 or when the adsorbent 2 adsorbs a predetermined amount of refrigerant, the three-way switching valves 6, 8, 11, 13, 15, 20.
Is switched from the state shown by the solid line to the state shown by the broken line. As a result, contrary to the above, the heating fluid flows through the heat exchanger 12 of the second adsorption / desorption device 4, and the cooling fluid flows through the heat exchanger 7 of the first adsorption / desorption device 3. , The second adsorption / desorption device 4 is on the desorption side, the first adsorption / desorption device 3 is on the adsorption side, and the refrigerant vapor desorbed from the adsorbent 2 is condensed by the condenser 16 and then evaporated by the evaporator 19. Then, it is adsorbed by the adsorbent 1, and the heat generated during the adsorption is taken away by the cooling fluid flowing through the heat exchanger 7.

In the adsorption type refrigerating apparatus shown in Japanese Utility Model Laid-Open No. 5-42966, the receiver 17 and the outlet side of the evaporator 19 are connected by a bypass passage 21. In the middle of the bypass passage 21, An electromagnetic opening / closing valve 22 is provided. The bypass passage 21 allows the steam in the receiver 17 to flow to the outlet side of the evaporator 19 by opening the electromagnetic opening / closing valve 22 at the start of the operation, and at the start of the operation,
This is for preventing the pump 18 from sucking the refrigerant vapor that has been vaporized and vaporized in the receiver 17 and the pipes around it.

[0006]

By the way, in the adsorption type refrigerating apparatus of this type, generally, the evaporator 1 by the pump 18 is used.
The refrigerant liquid supply amount to 9 is controlled to increase as the thermal load on the evaporator 19 increases. Therefore, in the adsorption refrigeration system described above, when the operation is started in a state where the temperature of the evaporator 19 is high, the pump 18 supplies a large amount of refrigerant to the evaporator 19 accordingly, so that the receiver 17
The refrigerant liquid inside is depleted, and as a result, a large amount of refrigerant liquid commensurate with its thermal load cannot be sent to the evaporator 19.

The refrigerant liquid supplied to the evaporator 19 is
Since it rapidly boiles in the evaporator 19 and a large amount of refrigerant vapor is generated, the adsorbent on the adsorption side cannot sufficiently adsorb the large amount of refrigerant vapor, and the pressure in the evaporator 19 rises. Then, the refrigerant liquid cannot be completely evaporated in the evaporator 19, and the refrigerant liquid accumulates in the evaporator 19. In particular, as shown in FIG. 4, in the configuration in which the refrigerant vapor in the receiver 17 is bypassed to the outlet side of the evaporator 19 via the bypass passage 21, the pressure in the evaporator 19 is increased, and the evaporation is reversed. This causes a problem that the amount of the refrigerant liquid accumulated in the container 19 is increased.

The above-described phenomena of insufficient refrigerant supply to the evaporator 19 and refrigerant pooling in the evaporator 19 are particularly noticeable when used as an air conditioner for automobiles, and the inside of the automobile rapidly starts when operation is started. It becomes impossible to meet the demand for cooling. In order to solve such a problem, the adsorbents 1 and 2 may be increased in amount so as to increase the adsorption / desorption amount of the refrigerant vapor. Will turn into.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a shortage of the refrigerant liquid to be supplied to the evaporator at the time of starting the operation or to increase the amount of the refrigerant liquid without increasing the adsorbent. It is an object of the present invention to provide an adsorption type refrigerating apparatus which can solve the problem that the vaporizer cannot evaporate and accumulates.

[0010]

In order to achieve the above object, an adsorption type refrigerating apparatus of the present invention comprises an adsorbing / desorbing device filled with an adsorbent for adsorbing / desorbing refrigerant vapor, and the adsorbing / desorbing device. A condenser for condensing the refrigerant vapor desorbed from the evaporator, an evaporator for evaporating the refrigerant liquid by exchanging heat with the fluid to be cooled, and a pump for sending the refrigerant liquid condensed in the condenser to the evaporator. In the provided, while providing a communication passage for communicating the outlet side of the evaporator and the inlet side of the condenser,
An opening / closing means for opening the communication passage at a predetermined time is provided.

Further, the adsorption refrigeration system of the present invention compares a temperature sensor for detecting the temperature of the evaporator with the reference temperature, and when the temperature detected by the temperature sensor exceeds the reference temperature. , And a control means for opening the opening / closing means.

[0012]

When the thermal load on the evaporator is large, the opening / closing means is opened. Then, a large amount of the refrigerant vapor generated in the evaporator is returned to the condenser through the communication passage, so that the pressure increase in the evaporator can be prevented, and the refrigerant vapor returned to the condenser is re-condensed here by the pump. Since it is supplied to the evaporator, there is no fear that the amount of refrigerant liquid to be supplied to the evaporator will be insufficient.

In this case, if the control means compares the detected temperature of the temperature sensor with the reference temperature and opens the opening / closing means when the detected temperature exceeds the reference temperature, the thermal load of the evaporator is large or small. The opening / closing means can be opened when the amount of the refrigerant vapor evaporated and vaporized in the evaporator is large by properly judging the above.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment in which the present invention is applied to an automobile air conditioner called a car air conditioner will be described with reference to FIGS.
Will be described with reference to. The overall structure of the adsorption refrigeration system is shown in FIG. As shown in the figure, this adsorption type refrigerating apparatus is provided with first and second adsorbing / desorbing devices 31 and 32. These adsorbing / desorbing devices 31 and 32 are configured by filling a hollow container with adsorbents 33 and 34 for adsorbing / desorbing a refrigerant.

As the refrigerant, water, an alcohol aqueous solution obtained by adding alcohol to water, a chlorofluorocarbon refrigerant, or the like is used. However, water having a large latent heat is preferable, and the alcohol aqueous solution has an antifreezing effect. Also, the adsorbent 3
As 3, 34, a material that easily adsorbs a refrigerant, for example, silica gel, zeolite, activated carbon, activated alumina or the like is used.

Heat exchangers 35 and 36 are provided inside the first and second adsorbing / desorbing devices 31 and 32. The heat exchangers 35 and 36 are heated by engine cooling water. Water is supplied as a fluid, and water from a tank cooled by the air outside the vehicle is supplied as a cooling fluid. That is, the heating fluid supply pipe 37 is connected to the inlet 38 a of the three-way switching valve 38, and the three-way switching valve 38 is connected to the inlet 38 a.
The outlets 38b and 38c are connected to one ends of the heat exchangers 35 and 36 through pipes 39 and 40, respectively. The cooling fluid supply pipe 41 is connected to the inlet 42a of the three-way switching valve 42, and the outlet 42b of the three-way switching valve 42,
42c is connected to one end sides of the heat exchangers 35 and 36 via pipes 43 and 44, respectively. The other ends of the heat exchangers 35 and 36 are connected to the inlets 47a and 47b of the three-way switching valve 47 via the pipes 45 and 46, and the inlet of the three-way switching valve 50 via the pipes 48 and 49. 5
0a, 50b, a discharge pipe 51 for returning the heating fluid to the engine is connected to the outlet 47c of the three-way switching valve 47, and a discharge pipe 52 for returning the cooling fluid to the tank is connected to the outlet 50c of the three-way switching valve 50. It is connected.

Now, the first and second suction / desorption devices 31,
One end side of 32 is provided with an inlet 5 of a three-way switching valve 57 through outflow pipes 55 and 56 provided with electromagnetic switching valves 53 and 54 on the way.
The refrigerant vapors that are connected to 7a and 57b and are desorbed from the adsorbents 33 and 34 by being heated by the heat exchangers 35 and 36 flow out from these outflow pipes 55 and 56. The outlet 57c of the three-way switching valve 57 is connected to the inlet 58a of the condenser 58 for condensing the refrigerant vapor via the intermediate pipe 59, and the outlet 58b of the condenser 58 temporarily stores the condensed refrigerant liquid. Receiver 60 for
To the intermediate pipe 61.

The receiver 60 is the suction port 6 of the pump 62.
2a is connected via a suction pipe 63 to the pump 6
The second outlet 62b is an evaporator 64 for evaporating the refrigerant liquid.
Is connected to the inlet 64a of the through a discharge pipe 65. The outlet 64b of the evaporator 64 is connected to the intermediate pipe 66.
Is connected to the inlet 67a of the three-way switching valve 67, and the outlets 67b and 67c of the three-way switching valve 67 are connected to the solenoid opening / closing valve 6
8 and 69 are connected to the other end sides of the first and second suction / desorption devices 31 and 32 via return pipes 70 and 71 provided on the way.

Here, a blower 72 is attached to the condenser 58.
As a result, the air outside the vehicle is blown, and the refrigerant vapor supplied to the condenser 58 is cooled by exchanging heat with the air outside the vehicle. In addition, the evaporator 64
Is configured to exchange heat with the fluid to be cooled, that is, the air supplied into the vehicle by the blower 73 to cool the air. The three-way switching valves 38, 42, 47,
Numerals 50, 57 and 67 are driven by electromagnets or motors.

However, the outlet 64b side of the evaporator 64 is connected to the inlet 58a side of the condenser 58 by a communication pipe 74 as a communication passage, and an opening / closing means is provided in the middle of the communication pipe 74. An electromagnetic opening / closing valve 75 is provided. Further, the condenser 58 and the evaporator 64 are provided with temperature sensors 76 and 77, respectively, and detection signals of these temperature sensors 76 and 77 are input to a control circuit (not shown) serving as control means. This control circuit is mainly composed of a microcomputer and controls the entire adsorption refrigeration system according to a preset program.

Next, the operation of the above configuration will be described with reference to the flowchart of FIG. 2 showing the control contents of the control circuit. When the power is turned on, the control circuit starts executing the control program shown in the flowchart of FIG. 2, and first becomes in a state of monitoring whether or not the operation start operation of the adsorption refrigeration system is performed, until the start operation is performed. While the operation is stopped, all the solenoid on-off valves 53, 54, 68, 69, 75 are maintained in the closed state (repeat of steps S1 and S2). Then, when the operation start operation is performed (“YES” in step S2), the control circuit opens the other electromagnetic opening / closing valves 53, 54, 68, 69 of the communication pipe 74 excluding the electromagnetic opening / closing valve 75 (step S3). ), Three-way switching valves 38, 42, 47, 50, 5
7 and 67, for example, in the state shown by the solid line in FIG.
A pump (not shown) for supplying the heating fluid and the cooling fluid is started to start the operation of the adsorption refrigeration system (step S).
4). During operation, the control circuit operates according to the thermal load of the evaporator 64, for example, the temperature detected by the temperature sensor 77, to the pump 6
The amount of refrigerant liquid supplied to the evaporator 64 by 2 is controlled.

Now, the three-way switching valve 38 shown by the solid line in FIG.
The switching state of 42, 47, 50, 57, 67 is the first
In this state, the suction / desorption device 31 is on the refrigerant vapor desorption side and the second suction / desorption device 32 is on the refrigerant vapor adsorption side, and the heating fluid is the supply pipe 37, the three-way switching valve 38, and the first suction valve. -The heat exchanger 35 and the three-way switching valve 47 provided in the desorber 31 are discharged from the discharge pipe 51, and the cooling fluid is supplied to the supply pipe 41, the three-way switching valve 42, and the second suction / desorption device 3.
The heat is discharged from the discharge pipe 52 via the heat exchanger 36 and the three-way switching valve 50 provided in the inside 2.

When the heating fluid flows through the heat exchanger 35, the adsorbent 33 in the first adsorber / desorber 31 is heated, and the refrigerant adsorbed by the adsorbent 33 is evaporated and desorbed.
This refrigerant vapor enters the condenser 58 via the electromagnetic on-off valve 53 and the three-way switching valve 57, where it exchanges heat with the air blown from the blower 72 to be condensed and becomes a refrigerant liquid. After the refrigerant liquid flowing out from the condenser 58 is temporarily stored in the receiver 60,
It is supplied to the evaporator 64 by the pump 62, and the room air is cooled there to evaporate and vaporize. This refrigerant vapor enters the second adsorption / desorption device 32 via the three-way switching valve 67 and the electromagnetic opening / closing valve 69, and is adsorbed by the adsorbent 34. The heat generated during the adsorption of the refrigerant vapor is taken away by the cooling fluid flowing through the heat exchanger 36.

When the control circuit starts the operation of the adsorption type refrigerating apparatus as described above, it executes step S5 for judging whether or not the operation of stopping the operation is carried out next, and then the evaporator 6
Step S6 of comparing the detected temperature Te of the temperature sensor 77 of No. 4 with the detected temperature Tc of the temperature sensor 76 of the condenser 58, which is the reference temperature, and judging the magnitude relationship is executed. In step S6, if Te> Tc, "YES" is set and the electromagnetic opening / closing valve 75 of the communication pipe 74 is opened (step S7). If Te≤Tc, "NO" is set and the electromagnetic opening / closing valve 75 is closed. It is left as it is (step S8).

At the start of the operation, when Te ≦ Tc, the electromagnetic opening / closing valve 75 is kept closed,
At this time, since the thermal load of the evaporator 64 is not so large, the amount of the refrigerant liquid sent from the pump 62 to the evaporator 64 is not so large, so that the refrigerant vapor evaporated and vaporized in the evaporator 64 is smoothly transferred to the second Adsorbent 34 of adsorption / desorption device 32
Is adsorbed on. However, at the start of operation, Te>
When it is Tc, the thermal load on the evaporator 64 is large, so that a large amount of the refrigerant liquid is discharged from the pump 62 to the evaporator 6.
Sent to 4.

Then, a large amount of the refrigerant liquid sent to the evaporator 64 abruptly boils here to generate a large amount of the refrigerant vapor. Then, the adsorbent 34 of the second adsorbing / desorbing device 32 cannot completely adsorb the rapidly generated refrigerant vapor, and therefore the pressure of the evaporator 64 tends to increase. However, at this time, the control circuit proceeds to step S6.
In step S7, the electromagnetic on-off valve 75 of the communication pipe 74 is opened, so that the evaporator 64 is opened.
The refrigerant vapor that has been vaporized and vaporized in the above flows through the communication pipe 74 to the inlet 58a side of the condenser 58 on the low pressure side, and then flows into the condenser 58 together with the refrigerant vapor from the first adsorber / desorber 31. Is condensed again and stored in the receiver 60.

As described above, even if a large amount of refrigerant vapor is generated in the evaporator 64, the refrigerant vapor can be returned to the condenser 58 and recondensed. Therefore, the second suction / desorption device 3
Even if the adsorption capacity of 2 is limited, the refrigerant vapor is stagnated in the evaporator 64 and the internal pressure of the evaporator 64 rises, and the refrigerant liquid supplied to the evaporator 64 cannot evaporate and vaporize due to this internal pressure rise. There is no possibility of causing a problem that the liquid remains as it is,
The refrigerant liquid supplied into the evaporator 64 can be smoothly evaporated and vaporized. Moreover, when the thermal load on the evaporator 64 is large, even if there is a large amount of refrigerant liquid sent from the receiver 60 to the evaporator 64 by the pump 62,
The refrigerant vapor evaporated and vaporized in the evaporator 64 is liquefied again in the condenser 58 and accumulated in the receiver 60. Therefore, even if the refrigerant vapor supply capacity of the adsorbent 33 is limited, the refrigerant liquid in the receiver 60 may not be exhausted, and a large amount of refrigerant liquid corresponding to the thermal load can be sent to the evaporator 64. it can.

When the temperature of the evaporator 64 is lowered to Te≤Tc by continuing the operation with the electromagnetic opening / closing valve 75 opened, the control circuit determines "NO" in step S6, In the next step S8, the solenoid on-off valve 75
Close. At this time, the supply amount of the refrigerant liquid from the pump 62 to the evaporator 64 is reduced and the temperature of the evaporator 64 is also lowered, so that all the refrigerant vapor evaporated and vaporized in the evaporator 64 is in the second intake / desorption device. It is smoothly adsorbed by the adsorbent 34 of 32.

Now, when a predetermined time has passed from the start of operation,
A predetermined amount of the refrigerant is desorbed from the adsorbent 33, or the adsorbent 34 is in a state of adsorbing the predetermined amount of the refrigerant, so that the control circuit in step S4 operates the three-way switching valves 38, 42, 47, 5 respectively.
0, 57 and 67 are switched from the state shown by the solid line to the state shown by the broken line. As a result, contrary to the above, the heating fluid is
Since the cooling fluid flows through the heat exchanger 36 of the first adsorption / desorption device 32 and the cooling fluid flows through the heat exchanger 35 of the first adsorption / desorption device 31, the second adsorption / desorption device 32 is attached to the desorption side. , The first sucker
The desorber 31 is on the adsorption side, and the refrigerant vapor desorbed from the adsorbent 34 is condensed by the condenser 58, and then the evaporator 64.
Then, it is evaporated and is adsorbed by the adsorbent 33, and the heat generated during the adsorption is taken away by the cooling fluid flowing through the heat exchanger 35.

Thus, the first and second suction / desorption devices 3
By repeating the operation in which 1 and 32 are alternately on the desorption side and the adsorption side, the adsorbents 33 and 34 alternately repeat desorption and adsorption of the refrigerant, and the interior of the vehicle is cooled by the evaporator 64.
During such operation, the temperature Te detected by the temperature sensor 77 of the evaporator 64 is the temperature Tc detected by the temperature sensor 76 of the condenser 58.
When it exceeds the value, the electromagnetic opening / closing valve 75 of the communication pipe 74 is opened as described above. Then, when the operation to stop the operation is performed, the control circuit determines “YES” in step S5, returns to step S1, and returns to the electromagnetic opening / closing valves 53, 54, 6
8, 69 and 75 are closed and the pumps for supplying the heating fluid and the cooling fluid are stopped.

As described above, according to this embodiment, the evaporator 64
When the thermal load is large, the electromagnetic on-off valve 75 is opened to return the refrigerant vapor evaporated and vaporized in the evaporator 64 to the inlet 58a side of the condenser 58, which causes a problem of insufficient refrigerant liquid in the receiver 60. Instead, it is possible to supply a large amount of refrigerant liquid to the evaporator 64 and to vaporize and vaporize the entire liquid, and the temperature of the interior of the vehicle receiving the air cooled by the evaporator 64 is also lowered at an early stage.

FIG. 3 shows the temperature inside the vehicle with the elapse of time from the start of the operation when the thermal load on the evaporator is large in the case of the adsorption refrigeration system of the present invention and in the case of the conventional adsorption refrigeration system. From the figure, it is understood that the present invention shown by the solid line has a lower temperature and a superior cooling rising property than the conventional one shown by the broken line. .

Further, particularly in this embodiment, the solenoid opening / closing valve 75
Is determined by comparing the temperature Te detected by the temperature sensor 77 of the evaporator 64 and the temperature TC detected by the temperature sensor 76 of the condenser 58, the thermal load of the evaporator 64 is large and a large amount of The electromagnetic opening / closing valve 75 of the communication pipe 74 can be opened by properly determining the time when the refrigerant vapor is rapidly generated.

The present invention is not limited to the above embodiments, but can be modified or expanded as follows.
The reference temperature to be compared with the temperature detected by the temperature sensor 77 of the evaporator 64 may be a constant temperature. Although the temperature sensors 76 and 77 detect the surface temperatures of the condenser 58 and the evaporator 64, the present invention is not limited to this. For example, the temperature sensors 76 and 77 may detect the temperature of the refrigerant flowing through the condenser 58 and the evaporator 64, or the condenser 58. The temperature of the condenser 58 and the evaporator 64 may be detected by detecting the air temperature after heat exchange with the evaporator 64.

The timing for opening the electromagnetic opening / closing valve 75 of the communication pipe 74 may be set to a fixed time from the start of operation. Pipes 55, 59, 61, 63, 65, 66, 68, 69
Constitute a refrigerant passage, but these may be replaced with a hose. The three-way switching valves 57 and 67 are the first and second
Which corresponds to switching means for alternately switching the suction / desorption devices 31, 32 to the desorption side or the adsorption side.
67 may be omitted, and the first and second suction / desorption devices 31, 32 may be alternately switched to the desorption side and the adsorption side by selectively opening / closing the electromagnetic opening / closing valves 53, 54, 68, 69.

The opening / closing means is not limited to the electromagnetic opening / closing valve 75, for example, it can flow only from the evaporator 64 side to the condenser 58 side, and the pressure difference between the outlet side of the evaporator 64 and the inlet side of the condenser 58. It is also possible to use a check valve that opens when is a predetermined value. By doing so, the temperature sensor 76,
It is possible to eliminate the control means for controlling the 77 and the opening / closing means. INDUSTRIAL APPLICABILITY The adsorption refrigeration system of the present invention can be used not only for automobile air conditioners but also for general air conditioners, freezers, refrigerators, and the like.

[0037]

As described above, according to the present invention, the following effects can be obtained. In the adsorption refrigeration apparatus according to claim 1, when the amount of refrigerant evaporated in the evaporator is large, such as when the evaporator starts to operate with a large thermal load, the outlet side of the evaporator and the condenser are cooled. Since it is possible to communicate with the inlet side by a communication passage, even if the amount of adsorbent is not increased, there is no risk that the refrigerant liquid will not completely evaporate and accumulate in the evaporator, and the refrigerant vapor that has evaporated and vaporized in the evaporator Is returned to the condenser and is condensed again there, so that there is no fear that the amount of the refrigerant liquid supplied to the evaporator will be insufficient, and it is possible to meet the demand for rapid cooling and the like.

In the adsorption type refrigerating apparatus according to the second aspect, the control means compares the temperature detected by the temperature sensor with the reference temperature, and when the detected temperature exceeds the reference temperature, the opening / closing means is opened. The opening / closing means can be opened when the amount of the thermal load is properly judged and the amount of the refrigerant vapor evaporated and vaporized in the evaporator is large.

[Brief description of drawings]

FIG. 1 is a piping configuration diagram of an adsorption refrigeration system showing an embodiment of the present invention.

FIG. 2 is a flowchart showing control contents.

FIG. 3 is a diagram showing a temperature change in the vehicle accompanying the operation of the adsorption refrigeration system.

FIG. 4 is a view corresponding to FIG. 1 showing a conventional adsorption type refrigeration system.

[Explanation of symbols]

31 and 32 are first and second adsorbing / desorbing devices, 33 and 34 are adsorbents, 35 and 36 are heat exchangers, 58 is a condenser, 60 is a receiver, 62 is a pump, 64 is an evaporator, and 74 is Communication pipe (communication passage), 75 is an electromagnetic opening / closing valve (opening / closing means), 76,
Reference numeral 77 is a temperature sensor.

Claims (2)

[Claims] 1. An adsorber / desorber filled with an adsorbent for adsorbing / desorbing a refrigerant vapor, a condenser for condensing the refrigerant vapor desorbed from the adsorber / desorber, and a refrigerant liquid and a cooled fluid. In an adsorption type refrigeration system equipped with an evaporator that evaporates by being exchanged, and a pump that sends the refrigerant liquid condensed in the condenser to the evaporator, the outlet side of the evaporator and the inlet side of the condenser are An adsorption type refrigerating apparatus, characterized in that a communication passage communicating with the communication passage is provided and an opening / closing means for opening the communication passage at a predetermined time is provided. 2. A temperature sensor for detecting the temperature of the evaporator, and a control means for comparing the detected temperature of the temperature sensor with a reference temperature and opening the opening / closing means when the detected temperature of the temperature sensor exceeds the reference temperature. The adsorption type refrigerating apparatus according to claim 1, further comprising: