JP2007320393A - On-vehicle air conditioner and its driving method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle air conditioner formed so as to condition air in a bed room provided at a driver's seat back surface position of a truck even during stopping of an engine, having a simple structure, and easily being attached later; and its driving method. <P>SOLUTION: The on-vehicle air conditioner has a control circuit portion 36 connected to an on-vehicle power source 38, Peltier element 30 connected so as to be fed by the control circuit portion 36, and a heat absorbing/radiating portion 38 integrally provided so as to transmit heat with the Peltier element 30. A ventilating fan 34 circulating and discharging air heat-exchanged with the heat absorbing/radiating portion 28 to a bed room 14, and a heat exchanger 18 coupled to the heat absorbing/radiating portion 28 and formed so as to circulate heat exchanging fluid are provided. A thermal storage portion 16 is provided, which stores the heat exchanger 18, is installed at a lower part of a bed main body 46 such as a bed mat in the bed room 14, and filled with thermal storage material. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to an in-vehicle air conditioner that cools and heats a nap break bedroom provided on a truck, and a driving method thereof.

  2. Description of the Related Art Conventionally, trucks used for long-distance transportation, large trucks, and the like have been provided with a nap bedroom behind the driver's seat. The air conditioner in this bedroom is air-conditioned by switching the air conditioner that air-conditions the driver's seat and passenger seat.

  Patent Document 1 discloses a vehicle air conditioner that performs air conditioning using a Peltier element as an air conditioner. The heat radiation part of the Peltier element is exposed to the outside of the vehicle so that the heat radiation when the interior of the vehicle is cooled can be released to the outside of the vehicle. Is formed. Further, Patent Document 2 discloses a seat air conditioner that uses a Peltier element to cool or heat from the inside of the seat.

In addition, Patent Document 3 discloses an automotive air conditioner that cools and cools cooling water in the form of a sherbet or warm water while the engine is running, and can cool and heat the engine even when the engine is stopped.
JP-A-8-11517 JP-A-10-922 JP 2001-150943 A

  However, since the refrigerant used for cooling is compressed by a compressor driven by the engine and radiated by a heat exchanger, and engine cooling water is used for heating, for example, a resting area such as a nap in a highway service area When performing air conditioning when taking off, it was necessary to keep the engine idling. For this reason, it is not economical because it consumes fuel and exhaust gas is discharged.

  In addition, as a system that can cool the truck cabin even when the engine is stopped, the cool storage material is frozen during driving and the interior of the cabin is cooled by using the latent heat of melting of the cool storage material during a nap break to use the engine. Possible cooling systems are known. However, in order to store heat in the heat storage material, it is necessary to connect a cooling device or a heating device assembled to the truck to a pipe or the like, which is difficult to be retrofitted and also costs installation costs. In addition, since separate devices are used for cooling and heating, the structure is complicated, and it is expensive and expensive to install the cooling device later.

  In Patent Document 1, it is possible to improve the immediate effect of cooling and heating at the time of starting the engine. However, in the case of continuously cooling and heating using a Peltier element, current must be continuously supplied. For this reason, in order to prevent the battery from being consumed, the truck engine must always be in an idling state, which is not economical and the exhaust gas does not affect the environment. In Patent Document 2, since the heat released from the Peltier element is released to the outside by the heat exchanger via the refrigerant, the heat exchange rate of the Peltier element is high, but in order to operate continuously, the current continues to flow even when the truck is stopped. There was a need. Therefore, as in Patent Document 1, in order to prevent the battery from being consumed, the engine must be in an idling state.

  In Patent Document 3, during the operation of the engine, in order to exchange heat by circulating in the heat storage material that is cooled in a sherbet shape, is heated by a heater, or is stored in a heat storage material, using a refrigerant such as water used for cooling and heating chambers. Air conditioning is possible even when the engine is stopped. However, the structure is complicated and expensive. In addition, installation space for heat storage materials and auxiliary equipment is necessary, retrofitting is not easy, and installation cost is high.

  The present invention has been made in view of the above-described problems of the prior art, and the bedroom provided at the back of the driver's seat of the truck can be air-conditioned even when the engine is stopped. It is another object of the present invention to provide an on-vehicle cooling / heating device and a driving method thereof.

  The present invention is an in-vehicle air conditioner for cooling and heating a truck bedroom, and includes a control circuit unit connected to an in-vehicle power source, a Peltier element connected to be fed by the control circuit unit, and the Peltier element. The heat absorbing / dissipating part integrally provided so as to be able to conduct heat, the blower fan that circulates and discharges air exchanged between the heat absorbing / dissipating part to the bedroom, and the heat exchange fluid connected to the heat absorbing / dissipating part. An in-vehicle air conditioner comprising: a heat exchanger formed to be circulatable; and a heat storage unit that houses the heat exchanger and is installed at a lower portion of a bed body such as a bed mat in the bedroom and is filled with a heat storage material. . A plurality of heat exchangers of the heat storage unit are formed to be connectable.

  The present invention also relates to a driving method of an in-vehicle air conditioner for cooling and heating a bedroom of a truck, a control circuit unit connected to an in-vehicle power source, a Peltier element connected to be fed by the control circuit unit, and the Peltier device The heat absorbing / dissipating part integrally provided so as to be able to conduct heat with the element, the blower fan for circulating and discharging the air exchanged heat with the heat absorbing / dissipating part to the bedroom, and connected to the heat absorbing / dissipating part An engine of the truck, comprising: a heat exchanger formed to circulate a heat exchange fluid; and a heat storage unit that houses the heat exchanger and is installed at a lower part of a bed body in the bedroom and is filled with a heat storage material. During operation, power is supplied to the Peltier element from the in-vehicle power supply by the control circuit unit, and the part of the Peltier element that contacts the heat supply / radiation unit cools or generates heat, and heat exchange is performed by the heat absorption / radiation unit. The heat is stored in the heat storage material of the heat storage unit by the fluid, the power supply to the Peltier element is stopped after the engine is stopped, the heat exchanging fluid is circulated by a circulation pump, and the heat absorbing and radiating unit is moved to the heat storage unit. This is a driving method for an in-vehicle air conditioner that cools or heats the air and heats the air that has been exchanged on the surface of the heat-absorbing and radiating portion by the blower fan into the bedroom.

  According to the in-vehicle air conditioner and the driving method thereof of the present invention, the bed portion of the bedroom provided in the position of the back of the driver's seat of the truck is also used as a heat storage unit, and heat is efficiently stored by the Peltier element during engine operation. During the stop, it is formed so as to be capable of cooling and heating by the heat storage of the heat storage section, the number of mounting parts is small, and the mounting is easy. Furthermore, since heat is stored in the heat storage section by the Peltier element, piping is not required between the vehicle-mounted air conditioner and retrofit is possible.

  DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an in-vehicle cooling / heating device and a driving method thereof according to the present invention will be described with reference to FIGS. The in-vehicle air conditioner 10 of this embodiment is used as an air conditioner for a bedroom 14 provided on the back of a driver's seat of a truck 12 that performs long-distance transportation or the like.

  As shown in FIG. 1, the in-vehicle air conditioner 10 of this embodiment is provided with a metal flat box-shaped heat storage unit 16 having an appropriate thickness. A heat exchanger 18 is accommodated in the heat storage unit 16, and a space outside the heat exchanger 18 in the heat storage unit 16 is filled and sealed with a heat storage material (not shown) such as paraffin or water. The outer surface of the heat storage unit 16 is covered and insulated by a heat insulating material (not shown). The heat exchanger 18 is formed of a resin pipe having flexibility, and is formed so that a heat exchanging fluid such as water or ethylene glycol can be circulated. And the heat storage part 16 is each connected with the ventilation unit 22 by the resin-made connection pipes 20a and 20b which have flexibility.

  The blower unit 22 is formed in a wide rectangular parallelepiped shape from resin or the like, and a suction port 24 is provided below the blower unit 22 and a blower outlet 26 is provided above. Inside the blower unit 22, a heat absorbing / dissipating part 28, which is a metal heat exchanger in which a heat exchange fluid is circulated by a circulation pump 25, and a Peltier element 30 integrally connected to the heat absorbing / dissipating part 28 so as to conduct heat. The heat exchange part 32 formed by these is provided. Connection pipes 20a and 20b are connected to both ends of the heat exchange pipe line in the heat absorbing / dissipating part 28, and a heat exchanging fluid is provided in the heat absorbing / dissipating part 28 so that it can circulate.

  Of the both side surfaces of the Peltier element 30, a radiator (not shown) is provided on the side surface that is not in contact with the heat absorbing / dissipating part 28, so that heat can be exchanged between the atmosphere and the Peltier element 30. In addition, a blower fan 34 is provided in the vicinity of the heat absorbing / dissipating part 28 of the heat exchanging part 32, and the air sucked from the suction port 24 is in contact with the surface of the heat absorbing / dissipating part 28 to exchange heat, and is discharged from the blower outlet 26. Arranged to be possible. Thereby, air circulates in the vehicle interior space and the space around the heat absorbing / dissipating part 28, and the temperature of the vehicle interior space is adjusted. Therefore, the surface area of the heat absorbing / dissipating part 28 should be large, and is formed in a heat radiating fin shape or the like. In addition, a control circuit portion 36 is provided in the vehicle body so as to be able to control power supply to the Peltier element 30.

  Here, the heat exchanger 18 accommodated in the heat storage unit 16 will be described. As shown in FIG. 4, the heat exchanger 18 is fixed and accommodated inside the heat storage unit 16 by a method not shown. The heat exchanger 18 includes a supply-side main pipe 40 and a return-side main pipe 42, and both ends of a plurality of thin heat-exchange pipes 44 are welded between the supply-side main pipe 40 and the return-side main pipe 42. It is connected. In addition, pipe connection portions 40 a and 42 a are respectively provided at one end portions of the supply side main pipe 40 and the return side main pipe 42. The supply-side main pipe 40 is connected to the supply-side connection pipe 20a via a pipe connection part 40a, and the return-side main pipe 42 is connected to the return-side connection pipe 20b via a pipe connection part 42b.

  Next, the attachment method of the vehicle-mounted air conditioning apparatus 10 of this embodiment is demonstrated. As shown in FIG. 2, for example, a heat storage unit 16 is installed as a mattress under the bed main body 46 in the bedroom 14 provided at the driver seat back position of the truck 12. Further, the blower unit 22 connected to the heat storage unit 16 and the heat absorbing / dissipating unit 28 of the heat exchanging unit 32 by the connecting pipes 20 a and 20 b is installed at an appropriate position such as a corner of the bedroom 14. And the power supply of the ventilation unit 22 is connected to the vehicle-mounted power supply 38. FIG. At this time, the connection with the in-vehicle power supply 38 may be simply made by using a cigarette lighter socket in the case of retrofitting.

  Next, the drive method of the vehicle-mounted air conditioning apparatus 10 of this embodiment is demonstrated. As shown in FIG. 3, when the engine of the truck 12 is in operation, the control circuit unit 36 connected to the in-vehicle power supply 38 supplies power to the Peltier element 30 of the heat exchange unit. First, when a cooling / heating changeover switch (not shown) connected to the control circuit unit 36 is set to cooling, the control circuit unit 36 has a surface that is in contact with the heat absorbing / dissipating unit 28 of the Peltier element 30 as a cooling surface by heat absorption. The surface is controlled to be a heat generating surface. As a result, the surface of the heat absorbing / dissipating part 28 that is in close contact with the Peltier element 30 is cooled, and the heat exchange fluid circulating inside is also cooled.

  In the heat exchange unit 32, the heat exchange fluid is circulated by the circulation pump 25. The heat exchange fluid flows through the connection pipe 20 a on the supply side and flows into the heat exchanger 18 of the heat storage unit 16. The inflowing heat exchange fluid circulates through the heat exchanger 18 and flows out to the return-side connecting pipe 20b. At this time, when the heat storage material filled in the heat storage unit 16 is heat-exchanged with the heat exchange fluid and is cooled, the cold heat is gradually stored.

  Next, when the engine of the truck 12 is stopped, the control circuit 36 stops power feeding to the Peltier element 30. Also at this time, power is supplied to the circulation pump 25 of the heat exchange fluid that circulates through the heat exchanger 18 of the heat storage unit 16 and continues to operate. The heat exchange fluid circulating in the heat storage unit 16 is cooled by the cold energy of the heat storage material during cooling, flows out to the return-side connecting pipe 20b, and flows into the blower unit 22. The heat exchange fluid that has flowed into the blower unit 22 circulates through the heat exchange section 32 and flows out to the supply-side connecting pipe 20a. At this time, the heat absorbing / dissipating part 28 is cooled by heat exchange with the heat exchange fluid flowing inside. The motor of the blower fan 34 continues to operate even when the engine is stopped, and the air in the bedroom 14 is sucked from the suction port 24 by the blower fan 34, and the sucked air is in contact with the surface of the heat radiating and radiating portion 28 and is heated. It replaces, it cools, and it blows off into the bedroom 14 from the blower outlet 26 of the ventilation unit 22. FIG.

  Next, in the case of heating, as in the case of the above cooling, first, a cooling / heating switching switch (not shown) connected to the control circuit unit 36 is switched to heating. While the engine of the truck 12 is in operation, the Peltier element 30 fed from the control circuit unit 36 is controlled by the control circuit unit 36 so that the surface in contact with the heat absorbing / dissipating unit 28 becomes a heat generating surface and the opposite surface becomes a cooling surface by heat absorption. Be controlled. The heat absorbing / dissipating part 28 in contact with the heat generating surface of the Peltier element 30 is heated, and the heat exchanging fluid circulating inside is also heated. The heated heat exchange fluid flows through the supply-side connecting pipe 20 a and flows into the heat exchanger 18 of the heat storage unit 16. The heated heat exchange fluid circulates through the heat exchanger 18 and flows out to the connection pipe 20b on the return side. At this time, the heat storage material filled in the heat storage unit 16 is heat-exchanged with the heat exchange fluid, and the heat is gradually stored.

  Next, when the engine of the truck 12 is stopped, the control circuit unit 36 stops power feeding to the Peltier element 30. Also at this time, the circulation pump 25 of the heat exchange fluid circulating through the heat exchanger 18 of the heat storage unit 16 continues to operate. The heat exchange fluid circulating in the heat storage unit 16 is warmed by the heat of the heat storage material, flows out to the connection pipe 20b on the return side, and flows into the blower unit 22. The heat exchange fluid that has flowed into the blower unit 22 circulates through the heat exchange section 32 and flows out to the supply-side connecting pipe 20a. At this time, the heat absorbing / dissipating part 28 is heat-exchanged by the heat exchanging fluid flowing inside. While the engine is stopped, the motor of the blower fan 34 is continuously powered and operated, and the air in the bedroom 14 is sucked from the suction port 24 by the blower fan 34, and the sucked air is in contact with the surface of the heat absorbing / dissipating part 28. The air is warmed up and blown into the bedroom 14 from the air outlet 26 of the air blowing unit 22.

  According to the in-vehicle cooling / heating device 10 and the driving method thereof according to this embodiment, the cooling / heating of the bedroom 14 provided at the driver seat back position of the truck 12 can be cooled / heated by the cooling / heating heat stored in the heat storage unit 16. Therefore, even when the vehicle is at rest, for example, the bed main body 46 is cooled or warmed by the heat storage unit 16, and the air conditioning in the bedroom 14 is performed only by operating the air blowing fan 40 and the circulation pump. It is economical and environmentally friendly because the load on the vehicle is small and idling is unnecessary. In addition, the heat source is formed by the Peltier element 30 and the heat energy is stored in the heat storage unit 16, and it is possible to easily retrofit because there is no need for piping connection with an in-vehicle air conditioner or the like. .

  In addition, since the heat storage section 16 connects the pipe connection ports 40a and 42a of the heat exchanger 18 and the heat exchange fluid can be circulated, it matches the size of the bedroom 14 and the size of the bed main body 46. A plurality of them may be used in combination.

  In addition, the vehicle-mounted cooling / heating device and the driving method thereof according to the present invention are not limited to the above-described embodiment, and the size of the heat storage unit can be appropriately set according to the size of the bedroom or the bed body. Furthermore, since the capability of a Peltier element should just have the emitted-heat amount which can be stored in a thermal storage part, a magnitude | size can be set suitably. Furthermore, the shape and material of each member can be appropriately changed.

It is a schematic perspective view which shows the vehicle-mounted air conditioning apparatus of one Embodiment of this invention. It is the schematic which shows the installation state of the vehicle-mounted air conditioning apparatus of this embodiment. It is a schematic diagram which shows operation | movement of the vehicle-mounted air conditioning apparatus of this embodiment. It is the schematic plan view (a) which shows the heat exchanger used for the thermal storage part of the vehicle-mounted air conditioning apparatus of this embodiment, and a side view (b).

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 In-vehicle air conditioner 12 Truck 14 Bedroom 16 Heat storage part 18 Heat exchanger 22 Blower unit 25 Circulation pump 28 Absorption and radiation part 30 Peltier element 32 Heat exchange part 34 Blower fan 36 Control circuit part 38 In-vehicle power supply 44 Heat exchange pipe 46 Bed body

Claims (3)

  In an in-vehicle cooling / heating device for cooling / heating a truck bedroom, a control circuit unit connected to an in-vehicle power source, a Peltier element connected to be able to supply power by the control circuit unit, and the Peltier element are integrated so as to be able to conduct heat The air-absorbing and radiating part provided in the air-cooling unit and the air-cooling fan that circulates and discharges the air exchanged between the heat-absorbing and radiating part to the bedroom, and the heat-absorbing and radiating part is connected to be circulated. An in-vehicle cooling / heating device comprising: a heat exchanger; and a heat storage unit that houses the heat exchanger and is installed at a lower portion of a bed body in the bedroom and is filled with a heat storage material.   The heat exchanger of the heat storage unit includes a supply side main pipe and a return side main pipe through which a heat exchange fluid circulates, and a plurality of thin heat exchange pipes are connected between the supply side main pipe and the return side main pipe. The in-vehicle air conditioner according to claim 1, wherein the heat storage unit is formed so that a plurality of the heat exchangers can be connected. In a driving method of an in-vehicle air conditioner for cooling / heating a truck bedroom, heat conduction between a control circuit unit connected to an in-vehicle power source, a Peltier element connected to be fed by the control circuit unit, and the Peltier element The heat absorbing / dissipating part integrally provided, the blower fan that circulates and releases the air heat-exchanged between the heat absorbing / dissipating part, and the heat exchanging part connected to the heat absorbing / dissipating part can be circulated. And a heat storage unit that is installed in the lower part of the bed main body in the bedroom and is filled with a heat storage material, from the on-vehicle power source during engine operation of the truck Power is supplied to the Peltier element by the control circuit unit, and the part of the Peltier element that is in contact with the power supply / radiation unit cools or generates heat. Stores heat in the heat storage material of the heat storage unit, stops power supply to the Peltier element after the engine is stopped, circulates the heat exchange fluid, cools or heats the heat absorbing and radiating unit by the heat storage unit, A method for driving an in-vehicle air conditioner, wherein air exchanged on the surface of the heat absorbing / dissipating part by a blower fan is discharged into the bedroom for air conditioning.

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