JP2010164259A - Temperature control device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature control device defrosting when necessary by accurately determining the necessity of defrosting and of suppressing effects on cooling operation, by selectively cooling a cabin for dozing on the rear side of a driver seat and the driver seat, even when frost is formed on an evaporator due to entry of outside air. <P>SOLUTION: A cooling unit 2 in which the evaporator in a refrigerant cycle driven by a storage battery 5 is stored within a temperature control chamber including a circulating fan, a blowout air course 28 and a return air course 29 and a compressor, a condenser and a heat release fan for cooling the compressor and the condenser are arranged within a machine chamber is mounted to inside of the cabin 4 for dozing on the rear side of the driver seat 3. Cold air or hot air generated by the evaporator is blown out to the driver seat 3, inside of the cabin 4 for dozing, or both of the driver seat 3 and inside of the cabin 4 for dozing to control temperature. Outlet side temperature of the evaporator is detected, and when the detected temperature is below predetermined temperature and a predetermined time or longer passes, defrosting timing is determined, to perform defrosting operation. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a configuration of a temperature control device that is installed in a nap cabin or the like in a truck cab and blows out cooled or warmed air.

  2. Description of the Related Art Conventionally, a driver's cab for a truck or the like is provided with a bedroom for sleeping in a cabin, and is configured to lie down at any time for rest and sleep. And when sleeping in the summer, we have secured a good sleep by driving a car air conditioner and air-conditioning the room, but the air conditioning of the whole room by operating the air conditioner consumes a large amount of power, and further idling Therefore, not only the power consumption, but also the impact on global warming due to the huge amount of carbon dioxide emission was significant.

  On the other hand, as shown in FIG. 10, an air conditioner having a heat exchanger (66) and a blower (68) in a sleeping bag (56) in which a space (78) in which a person (A) lies is formed ( The configuration in which the inside of the space is cooled by circulating the air from 52), and thereby the waste of energy resources and environmental pollution are suppressed by operating the refrigerator with low power. 1.

  Further, in Patent Document 2 shown in FIG. 11, heat exchange is performed at one end portion in a longitudinal direction of a horizontally and flatly extending mat (86) provided on a floor between a rear wall of a driver's cab and a driver's seat. Air circulation mat (81) provided with a heat exchanger to supply heat exchange air, and the supplied air flows in the air permeable mat (87) to provide a comfortable feeling for humans (A) The structure of is described.

  Further, for the sleeping bag described in Patent Document 1 and the mat device described in Patent Document 2, the present applicants attached a cooling unit driven by a storage battery in a nap cabin at the rear of the driver's seat and evaporated. Invented an in-vehicle temperature control apparatus configured to blow out cold air or warm air generated by a vessel into a driver's seat and / or a nap cabin, or both, and filed as Japanese Patent Application No. 2008-229394. .

JP 2007-098044 A JP 2007-105084 A

  However, when installing the sleeping bag described in Patent Document 1 and the mat device described in Patent Document 2 on a vehicle body such as a truck, the air conditioner must be installed together with the sleeping bag and the mat in a narrow cabin space. The work became extremely difficult, and there were many problems to be solved such as treatment of exhaust and dew condensation water, and the need to construct a structure that prevented external noise and heat from entering.

  In addition, the temperature control device described in the above-mentioned patent application suppresses resource waste and environmental pollution by idling stop, and easily attaches a cooling unit that blows out cooled or heated air to the interior of the driver's seat. In addition to the nap cabin, the driver's seat can be selectively cooled or heated, but when supplying cool air to the nap cabin or the driver's seat during a tropical night in the summer, Since the high-temperature and high-humidity outside air enters the cooling unit together with the indoor circulating cold air, the evaporator is frosted and becomes clogged, and the cooling performance is significantly deteriorated.

  The present invention has been made in view of the above circumstances, and by selectively cooling the nap cabin and the driver's seat at the rear of the driver's seat, even if the evaporator frosts due to intrusion of outside air, it is accurate. An object of the present invention is to provide a temperature control device capable of performing defrosting only when necessary by determining whether or not defrosting is necessary, and suppressing the influence on the cooling operation.

  In order to solve the above problems, a temperature control device of the present invention forms a refrigeration cycle by annularly connecting a compressor, a condenser, and an evaporator supplied with driving power by a storage battery, The evaporator is housed in a temperature control chamber formed of a heat insulating wall having a circulation fan and a blowout air passage and a return air passage, and the compressor, the condenser, and a heat dissipating fan for cooling them are disposed in the machine room. The temperature adjusting unit is mounted in the nap cabin at the rear of the driver's seat, the cool air or warm air generated by the evaporator is blown into the driver's seat and / or nap cabin, or both, and the temperature is adjusted. If the detected temperature is equal to or lower than the predetermined temperature and equal to or longer than the predetermined time, it is determined that the defrosting timing is reached and the defrosting operation is performed. The one in which the features.

  According to the present invention, it is possible to obtain a pleasant sleep with the engine stopped, and not only to circulate cold air or warm air in the sleeping bag but also in the cabin, thereby increasing the amount of frost formation on the evaporator. The defrosting can be performed at an appropriate timing, and the temperature can be adjusted without deteriorating the cooling performance.

It is a side view of the track provided with the temperature control device of one embodiment of the present invention. It is a top view of the temperature control apparatus installation part of FIG. It is a perspective view of the cooling unit in FIG. It is the front view which fractured | ruptured the front surface of the cooling unit of FIG. It is a top view of the machine room part of FIG. It is a schematic block diagram of the refrigerating cycle arrange | positioned in FIG. It is a cross-sectional view of the temperature control chamber in FIG. It is the schematic of the cooling mat in FIG. It is a schematic block diagram of the refrigerating cycle which shows the modification of FIG. It is sectional drawing which shows the sleeping bag of the prior art example of this invention. It is sectional drawing of the air circulation type mat | matte which shows the other prior art example of this invention.

  Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a side view of a front portion of a truck on which a temperature control device (1) according to the present invention is mounted, and FIG. 2 is a plan view thereof. The temperature control device (1) is a driver's seat used as a nap room. (3) A cooling unit (2) installed in the rear cabin (4) and a storage battery (5) for driving the cooling unit (2).

  In the rear cabin (4), the cooling unit (2) is arranged along the outer wall of the rear position on the passenger seat side, and the width direction of the vehicle body is the longitudinal direction with respect to the cooling unit (2). The cooling mat (6) for the user (A) to lie down is installed.

  The storage battery (5) is provided for driving power of the cooling unit (2) separately from the storage battery for trucks, and is charged when the automobile engine is driven. The rear cabin (4 ) Arranged in the lower part of the outside car body.

  The cooling unit (2) has a box-like outer shape formed by a thin steel plate outer plate (7) as shown in FIG. The central part of the direction is divided into upper and lower spaces by a heat insulating partition wall (8), and is bolted to a vehicle body bottom plate (4a) which is a floor surface of the rear cabin (4) via a gantry. .

  The space above the heat insulating partition wall (8) is a machine room (9), and compresses and discharges the refrigerant forming part of the refrigeration cycle (10) as shown in FIG. 4 and FIG. 5 which is a plan view. The compressor (11), the condenser (12) that receives the discharged high-temperature and high-pressure refrigerant and radiates and condenses, and the heat-dissipating fan (13) that cools high-temperature components such as these condensers (12) It is installed on a partition plate (14) made of a certain steel plate.

  As shown in FIG. 6, the refrigeration cycle (10) is formed by connecting the compressor (11), the condenser (12), a capillary tube (15) as a decompressor and an evaporator (16) in an annular shape, The refrigerant from the compressor (11) is circulated by driving according to (5) and is generated by the evaporator (16) to generate cold air. The compressor (11) includes the partition plate (14) It is arranged so as to be offset toward one side in the upper width direction, and is fixed via a cushion for absorbing vibration.

  The condenser (12) has a rectangular parallelepiped shape in which a meanderingly bent refrigerant pipe is fitted into a number of fins to reduce the depth dimension, and a suction opening ( A filter (18) is provided between the suction opening (17) and the condenser (12) to shield dust and the like.

  On the back surface of the condenser (12), a heat radiating fan (13) that is driven in synchronization with the operation of the compressor (11) is opened at the bottom of one corner in a plane facing the compressor (11). (19) is erected facing the edge, and during driving, outside air is sucked into the front through the opening (17) to cool the condenser (12), and the heat exchanged air is put into the outer plate ( 7) from the exhaust port (19) toward the lower exhaust duct (20).

  At this time, as described above, the compressor (11) is located on the side of the machine room (9) and is not easily subjected to the cooling action by the heat radiating fan (13). Is disposed so that the heat radiating fan (13) and the compressor (11) do not overlap with each other in the depth direction, thereby reducing the depth dimension of the machine room (9). The upper part of the machine room (9) is an electrical component storage part (21) such as a substrate, and an operation panel (22) is arranged on the front side to control the operation of the cooling unit (2).

  In the space below the heat insulating partition wall (8), a heat insulating side wall (23) formed of the same heat insulating material is provided on the inner surface side of the outer plate (7) so as to be continuous with the heat insulating partition wall (8). The temperature control chamber (25) has a heat insulation space inside by providing a rigid heat insulation wall (24) at the bottom, and as shown in the cross-sectional view of FIG. The evaporator (16) that generates the cold air that has been cooled by receiving the refrigerant from the condenser (12) and evaporating the refrigerant is arranged in a standing state in the width direction.

  As with the condenser (12), the evaporator (16) has a predetermined width and height from a meandering refrigerant pipe and a large number of fins fitted to the refrigerant pipe, and the depth dimension is reduced. A circulation fan (26) made of a sirocco fan is provided on the side of the temperature control chamber (25) at one end of the evaporator (16), that is, on the left side in FIG. The temperature control chamber (25) is juxtaposed in the depth direction so as to be orthogonal to the longitudinal direction of (16).

  On the bottom surface of the temperature control chamber (25) corresponding to the lower surface of the evaporator (16), a dew receiving bowl (27) inclined downward toward one side is formed, and this dew receiving bowl (27) Thus, the molten water after defrosting of frost adhering to the evaporator (16) during the cooling operation is collected. The collected defrost water flows into the exhaust duct (20) communicating with the lower end of the inclined surface of the dew receiving bowl (27) and flows out to the outside.

  A schematic structure is shown in front of the installation section of the circulation fan (26) in the temperature control chamber (25), which is connected by a fan casing and arranged on the vehicle body bottom plate (4a) in the front side space of the cooling unit (2). A cylindrical blowing air passage (28) connected to the cold air inlet (6a) is projected outward so as to introduce cold air into the air circulation type cooling mat (6) shown in FIG.

  On the front surface of the evaporator (16) located on the opposite side of the blowing air passage (28) in the width direction, a return air passage (29) is provided so as to protrude in the same manner as the blowing air passage (28). The cold air circulated and cooled in the cooling mat (6) is caused to flow from the return port (6b) to the one end side of the evaporator (16) in the temperature control chamber (25) through the return air passage (29). I am doing so.

  And, as shown by a two-dot chain line in FIG. 1, an extension duct (30) for branching the cool air flow path and supplying cool air is connected to a part of the blowing air passage (28), and its end portion Is extended to the ceiling part space of the rear cabin (4) or to the upper part of the driver's seat (3) through this, and the blowing direction is changed with a louver or the like for adjusting the wind direction, whereby the evaporator (15 ) Can be supplied to the space of the driver's seat (3).

  At this time, the extension duct (30) has a shape that can be flexibly bent, for example, a tube formed of a soft resin material provided with a spiral core material or a bellows-like cylindrical body and has heat insulation properties. The material is formed so that its length can be adjusted, and is drawn out into the cabin to blow out cold air in a spot manner.

  An air temperature sensor (31) is disposed in a part of the return air passage (29). This air temperature sensor (31) detects the temperature of the air that flows in the circulation air passage (6c) of the cooling mat (6) and reaches the return air passage (29) from the return port (6b). The operation of the compressor (11) in the cooling unit (2) is controlled by this detected temperature, the cooled air is supplied into the circulating air passage (6c), and the inside of the cooling mat (6) is filled with the user (A). To cool to the desired temperature.

  Therefore, even if there are various load fluctuations such as heat leakage from the outer surface of the cooling mat (6) due to outside air and heat generation load due to the body temperature of the user (A), it flows in the circulation air passage (6c) and flows into the evaporator (16). By accurately detecting the temperature of the cold air that reaches the room, the sleeping space is always controlled to a comfortable temperature state. A room temperature sensor (32) for detecting room temperature is attached to the outer surface of the electrical compartment (21) of the cooling unit (2), and a temperature sensor is provided near the outlet pipe of the refrigerant flow path of the evaporator (16). (33) is installed to detect the outlet temperature of the evaporator (16).

  As described above, the cooling unit (2) has the temperature adjustment chamber (25) disposed below the machine room (9), so that the cooling air blowout path (28) and return air from the temperature adjustment chamber (25) The position of the air passage (29) is the lower part of the cooling unit (2). In particular, when the object to be cooled is arranged near the floor surface, such as the air circulation type cooling mat (6), the connection Since the configuration is extremely easy and heat loss is small, the efficiency of cold air transmission can be improved. In addition, the cold air intake (6a) and the return port (6b) of the cooling mat (6) installed in the vicinity of the floor surface may be directly connected to the cold air blowing air passage (28) and the return air passage (29). Therefore, a long duct member becomes unnecessary, and not only the duct space can be reduced, but also the number of parts and cost can be suppressed, and the duct member does not protrude, so that the appearance can be kept good.

  With the above configuration, when the compressor (11) in the cooling unit (2) is operated, the evaporator (16) is cooled down by evaporating the refrigerant from the condenser (12) and the temperature control chamber (25 The cooling air is cooled by the circulation fan (26) from the blowing air passage (28) to the cooling air inlet (6a) on the cooling mat (6) side which is the object to be cooled. ) To cool the inside of the cooling mat (6). After the circulation air passage (6c) is circulated, the air flows from the return air passage (29) through the return port (6b) into the temperature control chamber (25). The cooling air circulation is repeated by flowing into the evaporator (16) and cooling again.

  Therefore, in the summer, when the nap is carried out in the long-distance transportation by the truck equipped with the temperature control device (1), the compressor (11) of the cooling unit (2) is started and generated. The cooled air is blown out from the circulation fan (28) and supplied to the cooling mat (6) to be cooled. At this time, the cooling air is not limited to the circulation air path (6c) of the cooling mat (6), but also the extension. When used to cool the duct (30) by blowing it out to the rear cabin (4), the air in the rear cabin (4) is circulated and the outside air is returned to the cooling unit (2). Therefore, external moisture adheres to the evaporator (16) as frost. In particular, when the outside air is hot and humid, a large amount of moisture becomes frost and adheres to the evaporator (16), so that the surface is covered with frost and the cooling power as the evaporator is greatly reduced.

  Therefore, when the temperature of the evaporator (16) by the temperature sensor (33) is a reference temperature, for example, a state of −3 ° C. or less continues for a predetermined time, for example, 3 minutes or more, it is the defrost timing. It judges and controls so that a defrosting operation is performed.

  In the defrosting operation, the compressor (11) is stopped and only the circulation fan (26) is driven to control the temperature of the circulation air passage (6c) of the cooling mat (6) and the air in the rear cabin (4). By introducing it into the evaporator (16) part of the chamber (25), frost is melted by heat exchange with air at a positive temperature.

  As a result, the frost in the evaporator (16) can be removed at an early stage, and air that has been cooled by heat exchange with the frost by defrosting circulates in the circulation air passage (6c) and the like, so the influence of the defrost is small. Therefore, there is an effect that it is possible to promptly return to the steady cooling operation without giving the user a sense of incongruity.

  The defrosting control performs a defrosting operation at any time during frosting, and the cold air temperature after circulation is detected by detection of an air temperature sensor (31) disposed in a part of the return air passage (29). In the case where excessive frost is not observed due to continuing at a substantially constant temperature, or in an atmosphere state where the outside air temperature is relatively high, the defrosting operation may be performed periodically. For example, the rear cabin ( 4) When the internal temperature continues to be a high temperature of 25 ° C. or higher, it is always in a state where frost is easily formed. Therefore, the defrosting operation is performed every hour by a timer. Also good.

  The defrosting of the evaporator (16) is not limited to the above, and the discharge gas from the compressor (11) may be introduced into the evaporator (16) by a bypass circuit. That is, the refrigeration cycle (10 ') is the same as that shown in FIG. 6 as shown in FIG. ) And connecting the branching bypass pipe (35) via the check valve (36) between the capillary tube (15) and the evaporator (16), and the compressor (11) using the storage battery (5) During defrosting, the evaporator (16) is defrosted by introducing a high-temperature gas refrigerant from the compressor (11) by switching the circuit during defrosting.

  If it does in this way, defrosting can be completed promptly and the influence of defrosting can be lessened also to a user.

  By the above, when the user desires, the cooling unit (2) is driven by pressing the start button, and the cooling mat (6) or The nap space such as the rear cabin (4) will be cooled, and when taking a nap in a car such as a truck or a passenger car, the user can quickly get a cool atmosphere with cold air and take a nap comfortably. It is something that can be done. At the same time, when the amount of frost formation on the evaporator (16) increases due to use at high temperature and high humidity, etc., defrosting can be performed effectively and promptly at an appropriate timing. it can.

  In addition, although the said cooling mat (6) as a cooling target object in each said structure introduces cold air in an internal cavity, it cools the human body which enters the upper part or the inside, It is not restricted to this, What is necessary is just a structure which cannot integrate a cooling unit (2) and a cooling target object from the form and installation space.

  Moreover, about each said Example, although the cooling unit (2) produced | generated cold air and demonstrated the structure which blows off this to the cooling mat (6) side which is a cooling target object, it produces | generates warm air contrary to the said cold air. In this case, although not shown, the upstream side and the downstream side of the compressor (11) in the refrigeration cycle (10) are connected. The evaporator (16) is used as a condenser which is a heat exchanger on the high temperature side by providing a four-way valve and switching the refrigerant flow path so as to blow out warm air from the evaporator (16) which has reached a high temperature. You can do it.

  In each of the above embodiments, the temperature control device (1) used in a vehicle such as a truck has been described. However, the present invention is not limited to the vehicle-mounted device, but can be used for personal use at home or for hospital use. It can be used widely for outdoor use. The power source from these objects is not limited to a battery, and an AC power source may be used.

DESCRIPTION OF SYMBOLS 1 Temperature control device 2 Cooling unit 3 Driver's seat 4 Rear cabin 5 Storage battery 6 Cooling mat 6a Cold air intake 6b Return port 6c Circulation air path 9 Machine room 10 Refrigeration cycle 11 Compressor
12 Condenser 13 Radiating fan 16 Evaporator
19 Exhaust port 25 Temperature control chamber 26 Circulation fan
27 Dew catcher 28 Outlet air channel 29 Return air channel
30 Extension duct 31 Air temperature sensor 32 Room temperature sensor
33 Temperature sensor 34 Three-way valve 35 Bypass pipe A User

Claims (3)

  A compressor, a condenser, and an evaporator, which are supplied with driving power by a storage battery, are connected in an annular shape to form a refrigeration cycle, and the evaporator in the refrigeration cycle is connected to a circulation fan, a blowing air path, and a return air path. A temperature control unit, which is housed in a temperature control chamber formed by a heat insulating wall body and has the compressor, the condenser, and a heat radiating fan for cooling the compressor, is installed in the nap cabin at the rear of the driver's seat The cool air or warm air generated by the evaporator is blown out into the driver's seat and / or the nap cabin, or both, and the temperature at the outlet side of the evaporator is detected, and the detected temperature is below a predetermined temperature. And if it is more than predetermined time, it will be judged as a defrosting timing, and the defrosting operation was performed, The temperature control apparatus characterized by the above-mentioned.   The temperature control apparatus according to claim 1, wherein the defrosting operation is performed by stopping the compressor, rotating only the cooling fan, and circulating the air in the temperature control chamber to the evaporator to exchange heat.   2. The temperature control device according to claim 1, wherein the defrosting is performed by introducing a discharge gas from a compressor in the refrigeration cycle into the evaporator by a bypass circuit.

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