JP2871596B2 - Vehicle cooling system - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner for a vehicle capable of cooling air in a nap room of a truck even when parking (when the engine is stopped). 2. Description of the Related Art Conventionally, a vehicle cooling system disclosed in Japanese Utility Model Laid-Open Publication No. 58-58919 has been disclosed as a prior art in which a nap room or the like in a vehicle compartment can be cooled even when parking (when the engine is stopped). There is a device. According to this prior art, the first cooling unit cools mainly the front seat in the vehicle interior, and the second cooling unit cools the nap room in the vehicle interior. More specifically, the first cooling unit is provided with a first evaporator and a blower of a refrigeration cycle. When the blower is operated, the air blown from the blower is cooled by the first evaporator, and the cool air is blown out toward the front seat in the passenger compartment, thereby mainly cooling the space on the front seat side. . The second cooling unit includes a regenerative heat exchanger in which the second evaporator of the refrigeration cycle is provided, and a part that projects into the vehicle interior and another part is provided in the regenerative heat exchanger. A heat pipe which is inserted therein and has a working fluid sealed therein which evaporates on the high temperature side and condenses on the low temperature side is provided. Then, the cold storage operation is performed by opening the operation valve as needed to allow the refrigerant to flow through the cold storage heat exchanger. [0004] However, the above-mentioned prior art
The technology has no configuration to indicate when cold storage is complete.
As a driver, the second cooling unit
It is clear when to start cooling in the nap room
The problem of not knowing arises. Therefore, an object of the present invention is to solve the above problems. [0006] In order to achieve the above object, the invention described in claims 1 to 4 is characterized in that the cold storage opening
Refrigerant from the start instruction means (4) to the second refrigerant evaporator (28)
When the supply instruction is given, the cold storage operation is terminated.
Temperature is lower than the first set temperature for starting or restarting.
Higher than the second set temperature to indicate that the
It is characterized by doing. [0007] In the case of the above configuration, a cold storage start instruction is issued.
When the cold storage is started under the instruction from the means (4), the cold storage
When the temperature of the material (29, 29a) falls below the first set temperature
The cold storage is terminated and the cold storage material (29, 29
When the temperature of a) becomes equal to or higher than the first set temperature, cold storage is restarted.
This is repeated, but the basis of this repeated operation
Whether to display the completion of cold storage more than the standard first set temperature
The second set temperature, which is a criterion for determining whether or not
Thus, the display state of the display member (8) is linked to the above-described repeated operation.
It does not move and changes, and a stable display state
realizable. The present invention will be described below with reference to an embodiment shown in the drawings. FIGS. 1 and 2 show a first embodiment. FIG. 1 shows an automotive refrigeration cycle for cooling a driver's cab and a nap room in a vehicle such as a truck. It is connected to a drive shaft of an automobile engine (not shown) via a clutch 20. In this embodiment, a 10-cylinder swash plate compressor is used as the compressor 21, of which 8 cylinders are configured as a main compression section 21a for an operator's cab, and the remaining 2 cylinders are sub-compressors for a nap room. The compression unit 21b is configured. in this case,
Each of the compressors 21a and 21b of the compressor 21 is provided with a cab main suction port 21e and a nap room sub suction port 21f independently of each other. Each compression section independently sets a different suction pressure. I am getting it. For example, the suction pressure of 2.0 kg / cm ² G at the main suction port 21e for the cab and the suction pressure of 1.2 kg / cm ² G at the sub suction port 21f for the nap room can be independently set. And the nap room sub-compressor 21b are communicated with each other by a communication passage 21d,
The refrigerants (R12) having different pressures respectively sucked from the respective suction ports 21e and 21f are communicated by the communication passages 21d before being compressed by the respective compression units 21a and 21b, and are increased to the pressure of the refrigerant on the cab side. After that, each compression unit 21a, 2
1b, each is compressed, and discharged from the common discharge port 21c to the outside of the compressor. The compressor 21 of such a type is known in Japanese Patent Application Laid-Open No. 60-48463, which has been previously proposed by the present applicant, and a detailed description of the structure will be omitted. Here, the compressor 21 can be applied to a vane type compressor in addition to the above-mentioned swash plate type multi-cylinder type. In this case, if the auxiliary suction port 21f for the nap room and the main suction port 21e for the cab are opened in ascending pressure order along the rotation direction of the rotor, the compression sections 21b and 21
In all cases, the compression can be started in a state where the suction pressure reaches the highest of 2.0 kg / cm ² . As described above, each of the compressors 21a and 21b of the compressor 21 of the present embodiment is provided with an independent suction port 21e and 21f, so that the suction pressure of each compressor can be set independently. Becomes As shown in FIG. 1, a discharge port 21c of the compressor 21 is connected to a condenser 22, and a discharge side of the condenser 22 is connected to a receiver 23. On the discharge side of the receiver 23, a cab cooling decompression device, in this embodiment, a temperature-operated expansion valve 24, and an cab evaporator 2 connected thereto.
5 (first evaporator) is provided, and a cooling air blower 26 (first blower) is disposed upstream of the evaporator 25 in the air. The refrigerant outlet side of the evaporator 25 is connected to the cab main suction port 21 e of the compressor 21 by the cab suction pipe 45. In the present embodiment, a first cooling unit A for cab cooling is configured by the above-described devices 24, 25, 26, and the like. On the other hand, a constant-pressure expansion valve 27, which is a specific example of the nap-room decompression device, and a nap-room evaporator 28 (second evaporator) connected to the constant-pressure expansion valve 27 are provided with the above-mentioned cab expansion valve. It is provided in parallel with the valve 24 and the evaporator 25. Nap room evaporator 28 and cool storage material 29 cooled by the evaporator 28
Is disposed in a cool storage material container 30 (case), and a check valve 33 that allows the refrigerant gas to pass in only one direction to the compressor suction side is connected to the outlet side of the nap room evaporator 28. The discharge side of the check valve 33 is connected to a nap room sub suction port 21f of the compressor 21 by a nap room suction pipe 46.
It is connected to the. The constant pressure expansion valve 27 opens when the downstream pressure thereof, that is, the pressure of the nap room evaporator 28 drops below a set pressure (for example, 1.2 kg / cm ² ), and sets the downstream pressure. Maintain pressure. In the present embodiment, the devices 27 to 30 and 33 constitute a second cooling unit B for nap room cooling. A communication pipe 47 is provided between the driver's cab suction pipe 45 and the nap room suction pipe 46, and a communication valve 47 (valve) is provided in the communication pipe 47. 48
By opening the valve, the suction pipes 45 and 46 communicate with each other. Next, the electric circuit of the present embodiment will be described. Reference numeral 1 denotes an on-vehicle battery, and a first control circuit 3 is connected to the battery 1 via a cab cooling switch 2. Reference numeral 4 denotes a nap room cold storage switch (cool storage start instruction means), which is connected to the battery 1 via the cab cooling switch 2, and a second control circuit 5 is connected to the nap room cold storage switch 4. I have. Reference numeral 6 denotes a temperature sensor provided on the air blowing side of the operator's cab evaporator 25, which comprises a thermistor and is connected to the first control circuit 3. In order to prevent the cab evaporator 25 from freezing, the resistance of the temperature sensor 6 increases when the evaporator blow-out temperature falls below the set temperature.
Detects the change in the resistance value, turns off the power supply to the electromagnetic clutch 20, and stops the compressor 21. Reference numeral 7 denotes a temperature sensor provided to sense the temperature of the cold storage material in the cold storage material container 30 cooled by the nap room evaporator 32, and is constituted by a thermistor. The temperature sensor 7 is connected to the second control circuit 5, and when the temperature detected by the temperature sensor 7 becomes lower than the set temperature, the second control circuit 5 cuts off the power supply to the electromagnetic valve 48, and Is opened. When the temperature detected by the temperature sensor 7 drops to another set value slightly higher than the set temperature, the second control circuit 5 turns on a display device 8 such as a lamp or an LED to display the completion of cold storage. It is supposed to. The display device 8 is arranged on an instrument panel or the like in the cab described later. Since there is a correlation between the temperature of the cold storage material in the container 30 and the temperature of the outer surface of the container 30, the temperature sensor 7 is closely fixed to the outer surface of the container 30 to detect the temperature of the outer surface of the container 30. You may do it. FIG. 2 illustrates a specific mounting structure of the refrigeration cycle portion shown in FIG. 1 on a vehicle.
Is a cab of a truck, and 51 is a nap room formed behind the cab 50, and is separated from the cab 50 by a partition member 51a such as a curtain. 52 is a bed in the nap room 51. Reference numeral 53 denotes an instrument panel located at the front of the cab 50, and the first cooling unit A for cab cooling is disposed below the instrument panel 53. Reference numeral 54 denotes an outlet (first outlet) for blowing out cool air, which is opened above the instrument panel 53. The cool air cooled by the evaporator 25 is supplied to the occupants (driver and passenger seat occupants) in the cab. ) Blow toward the upper body. 55 is a floor of the cab 50 and the nap room 51. In addition, the compressor 21 etc.
5 in the vehicle engine room. On the other hand, the second cooling unit B for nap room cooling is provided with a nap room 51.
Inside, it is disposed on the side wall at the rear position of the bed 52. The cold storage material container 30 of the second cooling unit B includes
It is formed in a thin box shape as shown in the figure by a metal such as stainless steel, and has an evaporator 28 and a cold storage material 29 sealed therein. Although various materials can be used as the cold storage material 29, in the present embodiment, salt water having a freezing temperature of −5 ° C. is used. Almost the entire outer surface of the cool storage material container 30 is directly exposed to the nap room 51.
Almost the entire outer surface of the container 30 forms a heat exchange surface with the nap room air. That is, the air is in contact with the outer surface of the cold storage material container 30 to exchange heat by natural convection indicated by an arrow a. Reference numeral 56 denotes a drain water receiving tray on which the bottom of the cold storage material container 30 is placed. Drain water in the receiving tray 56 is discharged to the outside by a drain pipe 57 disposed through the floor 55. In FIG. 2, the constant-pressure expansion valve 27 and the check valve 33 are shown below the floor 55 for convenience of illustration.
Reference numerals 7 and 33 are integrally formed with the container 33, the drain water receiving tray 56, and the like above the floor 55 to constitute one unit B. Next, the operation of the present embodiment will be described. FIG.
Is a Mollier chart of the refrigeration cycle, in which the cycle indicated by a solid line 90 indicates the operation characteristics of the refrigeration cycle for cab cooling, and the chain line 91 indicates the operation characteristics of the refrigeration cycle for nap room cooling. When the operator cab cooling switch 2 is turned on, power is supplied to the first control circuit 3. However, at the start of cooling, the temperature of the air blown out of the operator cab evaporator 25 is higher than a set temperature (for example, 3 ° C.). 3 compares the detection signal of the temperature sensor 6 with the reference signal, outputs a “Hi” level output, and energizes the electromagnetic clutch 20. Then, the electromagnetic clutch 20 is brought into the connected state, and the driving force of the vehicle engine is transmitted to the compressor 21, so that the compressor 21 rotates and compresses the refrigerant gas. In the above state, when the nap room cold storage switch 4 is further turned on, power is supplied to the second control circuit 5,
At the time of starting, the temperature of the cold storage material 29 is set to a set temperature (for example, −8).
° C), the second control circuit 5 compares the detection signal of the temperature sensor 7 with the reference signal, outputs an output at the "Hi" level, and energizes the solenoid valve 48, so that the solenoid valve 48 remains closed. And the display device 8 is given a "Lo" level output, so that the display device 8 remains off. Since the solenoid valve 48 is closed, the cab-side refrigerant from the cab suction pipe 45 is supplied to the main suction port 21e of the compressor 21 and to the nap room from the nap room cooling suction pipe 46. Is independently sucked into the sub suction port 21f of the compressor 21. Here, as described above, the sub-compression unit 21b for the nap room in the compressor 21 communicates with the main compression unit 21a for the cab through the communication passage 21d at the end of the suction process (near bottom dead center). The pressure in the compression section 21b rises to the same pressure as the cab side, that is, 2.0 kg / cm ² due to the inflow of the refrigerant from the main compression section 21a (P _{6 in} FIG. 3 →
P ₃ ). Therefore, both the compression units 21a and 21b compress the refrigerant at a pressure of 2.0 kg / cm ² (P ₃ → FIG. 3).
P ₄ ). The compressed refrigerant gas is both mixed discharged from the discharge port 21c, is cooled by the condenser 22 (P ₄ → P ₁ in FIG. 3). This liquefied refrigerant is stored in the receiver 23,
The pressure is reduced (P ₁ → P ₅ and P ₁ → P ₂ ) by the action of the constant-pressure expansion valve 27 and the temperature-operated expansion valve 24, and thereafter, the evaporation (P
₅ → P ₆ and P ₂ → P ₃ ). Here, P ₁ represents the state of the high-pressure refrigerant on the inlet side of the temperature-operated expansion valve 24,
P ₂ represents the state of the refrigerant on the discharge side of the expansion valve 24, and P ₃
Represents the state of the refrigerant in the suction port 21e of the cab for cooling main compression portion 21a, P ₄ represents the state of the refrigerant in the discharge port 21c. In the first cooling unit A for cab cooling,
The air blown by the blower 26 is cooled by the evaporator 25 to form cool air, and the cool air is blown out from the outlet 54 into the operation room 50, thereby cooling the operation room 50. On the other hand, in the cycle for sleeping chamber, by appropriately setting the opening pressure of the constant pressure expansion valve 27, it sets the state of the refrigerant downstream of the constant pressure expansion valve 27 to P _5. Specifically, the operation of the constant pressure expansion valve 27 allows the evaporation pressure of the evaporator 28 to be maintained at 1.2 kg / cm ² . As described above, by maintaining the evaporating pressure in the evaporator 28 for the nap room at 1.2 kg / cm ² , the refrigerant evaporating temperature is maintained at −10 ° C., and the cool storage material 29 is cooled and gradually frozen. It is possible to When the amount of the cold storage material in the container 30 is, for example, 12 liters, the freezing of the cold storage material 29 is completed by running the vehicle for about 3 hours (in other words, the cold storage is completed), and the temperature detected by the temperature sensor 7 becomes the set temperature. When the temperature falls to (for example, −6 ° C.), the second control circuit 5 determines the detection signal of the temperature sensor 7 and gives an output of “Hi” level to the display device 8.
The display device 8 is turned on to display the completion of freezing (cooling) of the cold storage material 29 to the driver. When the temperature detected by the temperature sensor 7 drops to another set value temperature (for example, -8.degree. C.) lower than the set temperature, the second control circuit 5 determines the detection signal of the temperature sensor 7, A "Lo" level output is given to the valve 48, and the solenoid valve 48 is opened. Then, the communication pipe 47
Is opened, so that the refrigerant in the cab side flows into the sub-suction port 21f of the compressor 21 via the communication pipe 47. As a result, the pressure in the suction pipe 46 for the nap room rises to the refrigerant pressure (2.0 kg / cm ² ) in the cab side, so that the constant-pressure expansion valve 27 remains closed, and the compressor 21 All cylinders are used for cab cooling. The check valve 33 prevents the refrigerant in the operator's cab from flowing back to the evaporator 28 in the nap room.
8 keeps a low temperature state for a while. The reason why the temperature (for example, -8.degree. C.) for opening the solenoid valve 48 is lower than the temperature for turning on the display device 8 (for example, -6.degree. C.) is as follows.
This is to prevent a problem that the temperature of the cold storage material 29 rises in a short time due to the opening of the valve and the display device 8 returns to the light-off state. As described above, when the cold storage material 29 of the second cooling unit B for nap room cooling completes freezing, the vehicle engine stops as in parking, and even if the compressor 21 stops, the inside of the nap room 51 remains long. Good cooling time. More specifically, the cooling effect of the nap room 51 during parking will be described.
When a 10-cylinder swash plate compressor 21 having a discharge capacity of 150 cc is used, eight cylinders are used as the main compression section 21a for the driver's cab, two cylinders are used as the sub-compression section 21b for the nap room, and the cold storage material 29 having a freezing temperature of −5 ° C. When the amount of water is 12 liters, the cold storage of the cold storage material can be completed by running the vehicle for about 3 hours, and the cooling capacity by the completion of the cold storage becomes 1000 kcal. It can be cooled to the following temperature for about 2 hours. As described above, in the present embodiment, the first
The evaporator 25 of the cooling unit A and the evaporator 28 of the second cooling unit B have the same refrigeration cycle, and
Since the cooling unit A is provided below the instrument panel 53, if the second cooling unit B is provided on the ceiling, the refrigerant pipe of the refrigeration cycle must be brought from below to the ceiling. There is a problem in turning,
In the present embodiment, since the second cooling unit is provided on the side wall at the rear position of the bed 52, the second cooling unit B
The arrangement of the refrigerant pipes is simplified as compared with the case where the air conditioner is provided on the ceiling. Next, a second embodiment of the present invention will be described with reference to FIG.
This will be described with reference to FIG. FIG. 4 shows a second embodiment of the present invention. In the second cooling unit B for nap room cooling, a small-sized motor-driven blower operated by using the vehicle-mounted battery 1 as a power source at the upper rear side of the cold storage material container 30. 58 is additionally provided, the suction port of the blower 58 is provided toward the lower rear of the container 30, and the air outlet 58 a is provided toward the nap room 51. According to the second embodiment shown in FIG. 4, when the napping room 51 is cooled during parking, when the small blower 58 is operated by using the vehicle-mounted battery 1 as a power source, the airflow indicated by the arrow A due to natural convection is generated. In addition, since the airflow of the arrow B is formed by forced convection, the inside of the nap room 51 can be cooled at a uniform temperature, and the occupant on the bed 52 can be blown by wind by forced convection. Cooling feeling can be improved. Next, a third embodiment of the present invention will be described with reference to FIGS. 5 to 8 show a third embodiment, in which the second cooling unit B is compactly formed in a vertically long box-shaped case 60, and the lowermost part of the case 60 has a nap room evaporator. A drain tray 61 for receiving drain water (condensed water) generated in the vessel 28 is arranged, and the tray 61 is provided so as to be able to be drawn out to the front of the case 60 for drain water treatment. In the present embodiment, the nap room evaporator 28 is configured as shown in FIG. 7, and is configured as a regenerative heat exchanger. That is, it has a multi-hole flat tube 28a through which the refrigerant flows, a refrigerant inlet pipe 28b, and a refrigerant outlet pipe 28c. Further, the flat tube 28a is formed in a meandering shape, and is formed on both front and back surfaces of a parallel portion of the flat tube 28a. In this example, a plurality of cold storage material packs 29a in which a cold storage material is sealed in a deformable bag (made of resin, aluminum foil, etc.) are fixedly attached by means such as bonding. The nap room evaporator 28 is disposed in the case 60 so that the flat tube 28a meanders in the vertical direction as shown in FIG. On the front surface of the case 60, a suction port 62 for sucking air in the napping room 51 is provided at a position between the napping room evaporator 28 and the drain pan 61. In the case 60, the nap room evaporator 28
Above the two blowers 6 using an axial fan
3 and 63 (second blower) are installed in parallel, and an outlet 64 (second blowout) for blowing air into the napping room 51 is provided on the front surface of the case 60 and above the blowers 63 and 63. ing. In this embodiment, the temperature sensor 7 for sensing the temperature of the cold storage material is tightly fixed on the outer surface of the cold storage material pack 29a fixed to the portion of the flat tube 28a located closest to the refrigerant outlet. The surface is covered with a heat insulating material so that the air temperature is not sensed. 6
Reference numeral 5 denotes a temperature sensor formed of a thermistor for sensing the room temperature of the nap room 51.
Small hole 66 drilled in the region between
It is installed in. That is, the blower 6
The temperature sensor 65 is located in the flow path of the room air sucked into the suction side of the nap room 3 or 63 to sense the room temperature of the nap room 51. In FIG. 8, reference numerals 28d and 28e denote refrigerant pipes for circulating the refrigerant through the nap room evaporator 28.
In FIG. 5, reference numeral 68 denotes a cooling start switch (cooling start instruction means) for the nap room 51, and reference numeral 69 denotes a relay. Next, the operation of the third embodiment will be described. The cold storage material pack 2 during the operation of the vehicle engine (the operation of the refrigeration cycle)
Since the cold storage operation to 9a is performed in the same manner as in the first embodiment, the description is omitted. On the other hand, when cooling the nap room 51 during parking, the cooling start switch 68 is turned on. As a result, the power supply voltage is applied to the contact 69a of the relay 69 and the second control circuit 5. When the room temperature of the nap room 51 detected by the temperature sensor 65 is higher than a set temperature (for example, 26 ° C.), the coil 69b of the relay 69 is energized by the second control circuit 5, and the contact 69a is closed.
3 is energized, and the blower 63 operates. Thereby, the nap room air is sucked into the case 60 from the suction port 62 of the case 60, and the flat tube 28a of the nap room evaporator 28 is formed.
Rises along the surface of the cold storage material pack 29a that is fixed to the storage space, and during this time, the intake air is cooled by the latent heat of melting of the cold storage material to become cool air, and is blown out from the outlet 64 into the napping room 51 to cool the napping room 51. Do. When the room temperature of the nap room 51 drops to the set temperature (26 ° C.), the power to the relay 69 is cut off based on the detection signal of the temperature sensor 65, and the contact 69a is opened, so that the blower 63 is stopped. I do. Thus, nap room 5
By automatically interrupting the operation of the blower 63 in accordance with the room temperature of 1, the nap room 51 is prevented from being too cold, and the frozen state of the cool storage material pack 29a is maintained for as long as possible, so that the nap during parking is performed. The cooling effect of the chamber 51 can be exerted for a long time. The present invention can be variously modified without being limited to the above-described illustrated embodiments, and representative modified examples will be listed below. In the first embodiment and the second embodiment, if the detachable heat insulating sheet is coated on the cold storage material container 30 when the vehicle is running, the cold storage time of the cold storage material 29 can be reduced. As shown in FIG. 1, the refrigerating cycle has a structure in which a compressor 21 having two suction ports 21e and 21f is used to allow a refrigerant to flow continuously between the cab side and the nap room side. As disclosed in JP-A-59-50828, a configuration has been changed in which a solenoid circuit is intermittently opened and closed by a timer circuit, and refrigerant is alternately circulated between a cab side and a nap room side. You may. As the pressure reducing device on the nap room side, in addition to the constant-pressure expansion valve 27, a temperature-operated expansion valve, a combination of a solenoid valve and a fixed throttle, or the like can be used. In the second cooling unit B for the nap room in the first embodiment and the second embodiment, a configuration in which the evaporator 28 is closely arranged outside the cold storage material container 30 to cool the cold storage material 29 may be adopted. In this case, an arrangement in which the evaporator 28 is interposed between the two containers 30 may be adopted. In the third embodiment, when the evaporator 28 integrated with the cool storage material pack 29a is installed in the case 60, the meandering direction of the flat tube 28a coincides with the vertical direction (air flow direction) of the case 60. Although the evaporator 28 is installed in such a manner, the evaporator 28 may be installed so that the meandering direction of the flat tube 28a is horizontal (in a direction perpendicular to the air flow). If you do this,
The ventilation resistance of air decreases. In this case, a plurality of evaporators 28 may be vertically stacked. In the above-described third embodiment, the operation of the blower 63 is automatically interrupted by the detection signal of the temperature sensor 65 for detecting the room temperature of the nap room 51. When the temperature rises as described above and the cooling function cannot be performed, the blower 63 is stopped by the detection signal of the temperature sensor 7 or the on-board battery 1
In order to prevent overdischarge of the air conditioner, a timer means is provided in the second control circuit 5, and when a predetermined time elapses after the cooling start switch 68 is turned on, the operation of the blower 63 is automatically stopped by the timer means. Is also good. In each of the above-described embodiments, the case where the present invention is applied to a cooling device for cooling the cab 50 and the nap room 51 in a truck has been described. ) Can be similarly applied to a cooling device for cooling the front seat (driver's seat and passenger seat) and a cooling device for cooling the rear seat.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a refrigeration cycle diagram showing a first embodiment of the present invention. FIG. 2 is a schematic sectional view showing a state in which the device of the present invention based on the first embodiment is mounted on a vehicle. FIG. 3 is a Mollier diagram for explaining operation. FIG. 4 is a schematic sectional view showing a second embodiment of the present invention. FIG. 5 is a refrigeration cycle diagram showing a third embodiment of the present invention. FIG. 6 is a schematic sectional view showing a state in which the device of the present invention based on the third embodiment is mounted on a vehicle. 7 is a perspective view of the nap room evaporator 28 shown in FIG. 8 is a perspective view of a second cooling unit B shown in FIG. [Explanation of Signs] 4 Sleeping room cold storage switch (cool storage start instructing means) 5 Second control circuit (cool storage control means, cooling control means) 25 Operating room evaporator (first evaporator) 26 Blower (first blower) 28 Nap Room Evaporator (Second Evaporator) 29 Cold Storage Material 29a Cold Storage Material Pack 30 Cold Storage Container (Case) 48 Solenoid Valve (Valve) 50 Operating Room, 51 Nap Room (Predetermined Area in Vehicle Interior) 54 (First air outlet) 60 Case 62 Inlet 63 Air blower (second air blower) 64 Air outlet (second air outlet) 68 Cooling start switch (cooling start instructing means) A First cooling unit B Second cooling unit

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) B60H 1/32 621 B60H 1/20

Claims (1)

(57) [Claims] A first evaporator (25) of a refrigeration cycle driven by a vehicle engine, a first blower (26) that blows air toward the first evaporator (25), and cooled by the first evaporator (25). A first cooling outlet provided to blow the cool air into the passenger compartment, and to cool the passenger compartment by blowing the cool air into the passenger compartment from the first outlet; A unit (A), a second evaporator (28) provided in the refrigeration cycle, and the second evaporator (2) during operation of the refrigeration cycle.
8) cold storage material (2
9, 29a), and at least the second evaporator (2
8) and a case (30, 60) for storing the cold storage material (29, 29a). The heat exchange between the cold storage material (29, 29a) and a predetermined area in the vehicle compartment cools the predetermined area. And a valve (48) for switching between a state in which the refrigerant of the refrigeration cycle is supplied to the second evaporator (28) and a state in which the refrigerant is not supplied to the second evaporator (28).
And a cold storage material temperature for detecting a temperature of the cold storage material (29, 29a).
Temperature detecting means (7), and the storage of the cold storage material (29, 29a).
A display member (8) to indicate that cooling is completed, the second evaporator and the cold storage start instruction means for instructing the supply of refrigerant to the (28) (4), from the cold storage start instruction means (4)
An instruction to supply the refrigerant to the second evaporator (28) is issued.
Detection by the cool storage material temperature detecting means (7)
When the temperature is equal to or higher than the first set temperature, the second evaporator (2
8) controlling the valve (48) so as to supply the refrigerant.
From the cold storage control means (5) and the cold storage start instructing means (4).
8) while the instruction to supply the refrigerant to 8) is given.
The temperature detected by the cold material temperature detecting means (7) is equal to the first setting.
When the temperature is equal to or lower than the temperature, the refrigerant is supplied to the second evaporator (28).
Cold storage stop for controlling the valve (48) to stop the supply
Control means (5) and the cold storage start instructing means (4).
8) while the instruction to supply the refrigerant to 8) is given.
The temperature detected by the cold material temperature detecting means (7) is equal to the first set temperature.
When the temperature is equal to or lower than the second set temperature higher than the constant temperature, the cold storage
The display unit indicates that the cold storage of the materials (29, 29a) has been completed.
Material vehicular cooling device comprising a this <br/> and a display control means for displaying (8) (5). 2. An air inlet (62) and a second outlet (64) are formed in the case (60). The cold storage material (29a) extends from the inlet (62) to the second outlet (64). A second blower (63) that blows air into the case (60) along the line; cooling start instruction means (68) for instructing activation of the second blower (63); and cooling start instruction means (68). ) Based on the signal from
The cooling start instructing means (68) is provided by the second blower (6).
When the start of 3) is instructed, the second blower (63) is driven to cool the cold air from the cold storage material (29a) into the second blower.
Cooling control means (5) for blowing out the predetermined area from an air outlet (64), wherein the predetermined area is cooled by blowing cool air from the second air outlet (64) to the predetermined area. The vehicle cooling device according to claim 1, wherein: 3. The suction port (62) is formed at a lower part of a front surface of the case (60), and the second outlet (64) is formed at an upper part of a front surface of the case (60). The vehicle cooling device according to claim 2, wherein 4. The said predetermined area | region is a nap room of a truck, The said 2nd air outlet (64) opens toward the space above the bed of the nap room. The claim 2 characterized by the above-mentioned. Or the cooling device for vehicles according to claim 3.