JP2010197021A - Temperature regulating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a temperature regulating device capable of properly performing a cooling operation by surely performing defrosting in frost formation without disposing a temperature sensor on an evaporator, and providing a comfortable cooling space by preventing a user from being excessively cooled even in using a sleeping bag. <P>SOLUTION: In this temperature regulating device in which cold air produced by a cooling unit in which the evaporator in a refrigerating cycle is received in a cooling chamber composed of a circulation fan and a heat insulating wall body having a supply air trunk and a return air trunk, and a compressor, a condenser and a radiation fan for cooling them are disposed in a machine chamber, is circulated by being supplied to a cooled object by the circulation fan and the supply air trunk, and returned to the return air trunk, a temperature of the returned cold air is detected by an air temperature sensor disposed in the return air trunk, and a room temperature sensor is disposed, so that a defrosting operation of the refrigerating cycle is controlled on the basis of the detection temperature of the room temperature sensor, and temperature difference between the room temperature sensor and the air temperature sensor. <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 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) However, when installing these sleeping bags and mat devices on the body of a truck, etc., it is necessary to install the air conditioner together with the sleeping bags and mats in a narrow cabin space, making the installation configuration and installation work extremely difficult. Therefore, there are many problems to be solved such as treatment of exhaust gas and condensed water, and a configuration that prevents external noise and heat from entering.

  For the sleeping bag described in Patent Document 1 and the mat device described in Patent Document 2, the applicants of the present patent application attach a cooling unit driven by a storage battery in a nap cabin at the rear of the driver's seat, and use an evaporator. An in-vehicle temperature control device configured to control the temperature by blowing out the generated cold air or warm air into the driver's seat and / or the nap cabin, or both, has been filed as Japanese Patent Application No. 2008-229394.

JP 2007-098044 A JP 2007-105084 A

  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 inside of the vehicle. In addition to the cabin, the driver's seat can be selectively cooled or heated. However, if the cool air is supplied to the nap cabin or the driver's seat during a tropical night in the summer, etc., the cooling unit Since high temperature and high humidity outside air intrudes into the room along with the indoor circulation cold air, the evaporator is frosted and becomes clogged, and the cooling performance is remarkably deteriorated.

  As for frost formation on the evaporator, a temperature sensor is attached to the refrigerant pipe part of the evaporator, and the operation of the cooling unit is stopped by detecting that the evaporator temperature is below freezing point, thereby raising the evaporator temperature. However, as described above, since the cooling unit must be installed in the narrow cabin, the installation space for the evaporator is naturally reduced, and the installation space for the temperature sensor is secured due to the structure of the evaporator. It was in a difficult state, and when a temperature sensor was installed, there was a problem that the cost increased accordingly.

  In addition, when the operation of the cooling unit is controlled by detecting the evaporator temperature, particularly when the cooling method is set to the continuous operation by cooling the inside of the sleeping bag with cooling air, the heat leakage Since the amount is small, the temperature in the sleeping bag becomes extremely low, and there is a possibility that the user may be adversely affected by being too cold.

  The present invention has been made in consideration of the above circumstances, and can perform defrosting at the time of frosting reliably without installing a temperature sensor in the evaporator, and can perform a good cooling operation. It is an object of the present invention to provide a temperature control device that can prevent a user from getting too cold and can form a comfortable cooling space.

  In order to solve the above problems, a temperature control device of the present invention forms a refrigeration cycle by connecting a compressor, a condenser, and an evaporator in an annular shape, and the evaporator in the refrigeration cycle is connected to a circulation fan and a blow-off air. Cold air generated by a cooling unit that is housed in a cooling chamber formed of a heat insulating wall having a passage and a return air passage and that has the compressor, the condenser, and a heat-dissipating fan that cools the compressor, the condenser, and the cooling chamber. In the temperature control device that circulates the object to be cooled by the circulation fan and the blowing air passage and returns to the return air passage, the temperature of the return cold air is detected by an air temperature sensor provided in the return air passage, and the cooling is performed. A room temperature sensor for detecting the room temperature at which the unit is installed is provided, and the temperature difference between the room temperature sensor and the air temperature sensor is determined by the temperature detected by the room temperature sensor. It is characterized in that for controlling the defrosting operation of the refrigeration cycle Te.

  According to the present invention, when the frost detection temperature sensor is frosted without being installed in the evaporator, it can be surely defrosted, and further, it is used even when cooling is performed by circulating cold air in the sleeping bag. Can prevent the person from getting too cold.

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 cooling chamber in FIG. It is the schematic of the cooling mat in FIG. It is a control flowchart of the cooling unit 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 a controller (22) for setting the control specifications of the cooling unit (2) and starting the operation is provided outside the main body.

  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). In addition, a rigid heat insulation wall (24) is provided at the bottom portion to form a cooling chamber (25) having a heat insulation space inside, and as shown in the cross-sectional view of FIG. The evaporator (16) that generates the low-temperature cold air by receiving the refrigerant from the evaporator (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 placed on the side of the cooling chamber (25) at one end of the evaporator (16), that is, on the left side in FIG. It is juxtaposed over the depth direction of the cooling chamber (25) so as to be orthogonal to the longitudinal direction of 16).

  On the bottom surface of the cooling 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) In the cooling operation, the molten water after defrosting of the frost adhering to the evaporator (16) 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.

  FIG. 8 shows a schematic structure that is connected to the front portion of the circulating fan (26) in the cooling chamber (25) 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 one end side of the evaporator (16) in the cooling chamber (25) through the return air passage (29). I have to.

  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 set temperature. A room temperature sensor (32) for detecting the room temperature is attached to the outer surface of the electrical compartment (21) of the cooling unit (2).

  Since the cooling unit (2) has the cooling chamber (25) disposed below the machine chamber (9) as described above, the cooling air blowing air passage (28) and the return air passage from the cooling chamber (25) are provided. The position of (29) is the lower part of the cooling unit (2). In particular, in the case where the object to be cooled is arranged near the floor, such as the air circulation type cooling mat (6), the connection configuration is It becomes extremely easy and heat transfer efficiency can be improved because there is little heat loss. 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 user (A) takes a nap in the rear cabin (4), when the compressor (11) in the cooling unit (2) is operated by setting the cooling temperature and the operation time, the condenser By evaporating the refrigerant from (12), the temperature of the evaporator (16) is lowered to cool the air in the cooling chamber (25), and the generated cold air is blown from the blowing air passage (28) by the circulation fan (26). The cooling mat (6) is blown out from the cold air intake (6a) on the cooling mat (6) side, which is the object to be cooled, to cool the inside of the cooling mat (6), and after the circulation air path (6c) is circulated. Through the return port (6b), the cooling air circulation is repeated by flowing into the evaporator (16) in the cooling chamber (25) from the return air passage (29) and cooling again.

  The cooling temperature at this time is obtained by controlling the drive of the compressor (11) by the air temperature sensor (31) in the return air passage (29). For example, the cooling air detected by the air temperature sensor (31) The temperature is divided into three levels, with 21-23 ° C being “strong”, 24-26 ° C being “suitable”, and 27-29 ° C being “weak”. Then, the compressor (11) is turned on and off at the upper and lower set temperatures to cool to a predetermined temperature.

  Thus, during a nap such as during long-distance transportation with a truck equipped with the temperature control device (1) in summer, etc., the cooling temperature and operating time of the cooling unit (2) by the controller (22) The compressor (11) is started according to the setting, and the generated cold air is blown from the circulation fan (28), supplied to the cooling mat (6), cooled and used as bedding. When cooling to the cooling mat (6) by circulating through the circulation air passage (6c) and cooling, the cool air circulates from the cooling chamber (25) to the circulation air passage (6c), and heat leakage to the outside is relatively small. Therefore, the temperature rise is suppressed and the temperature of the return cold air to the return air passage (29) is lowered.

  In particular, when the compressor (11) is in a continuous operation state due to an erroneous operation of the controller (22), the cold air temperature becomes lower and overcooling over time, and the amount of frost on the evaporator (16) However, since the cooling power is reduced and the evaporator (16) needs to be defrosted, the nap is affected by being too cold.

  The defrosting operation in this case is controlled as in the flowchart shown in FIG. The cooling unit (2) is driven by setting the cooling temperature and operation time by operating the controller (22) (step 1), the evaporator (16) is cooled by the operation of the compressor (11), and the circulation fan (26 ) Is generated from the blowout air passage (28), circulates in the circulation air passage (6c) of the cooling mat (6), and flows into the return air passage (29). Is detected by the air temperature sensor (31) and the room temperature (Tr) in the rear cabin (4) is detected by the room temperature sensor (32) (step 2). Next, a temperature difference between the detected temperature (Tr) and the detected temperature (Ts) of the air temperature sensor (31) is detected (step 3).

  Then, when the temperature (Tr) of the room temperature sensor (32) is not more than a predetermined temperature, for example, 28 ° C. or less in the step 2, and the temperature difference is not less than a predetermined value, for example, 3 deg in the step 3, Assuming that it is the frost timing, the compressor (11) is stopped for a predetermined time, for example, 5 minutes and then repeatedly operated for 30 minutes. The frost adhering to 16) is melted and removed, and the above control is repeated over the set operation time (step 4) while the temperature difference condition is satisfied (step 4). It is detected whether or not the time has been reached (step 5), and when the set operation time is reached, the defrosting operation is terminated.

  The defrosting method is not limited to the above method, and the frost may be removed immediately by heating the heater, and the compressor (11) is stopped and only the circulation fan (26) is driven. Heat exchange with positive temperature air by introducing the air in the circulation air passage (6c) of the cooling mat (6) and the air in the rear cabin (4) into the evaporator (16) of the cooling chamber (25). The frost may be thawed. 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.

  As described above, when the user desires, the cooling unit (2) is driven to blow out the cold air generated in the cooling chamber (25), thereby allowing a nap space such as the cooling mat (6) or the rear cabin (4). When the user takes a nap in an automobile such as a truck or a passenger car, the user can quickly obtain a cool atmosphere by cold air and can take a nap comfortably. At the same time, when the amount of frost formation on the evaporator (16) increases due to continuous operation specifications or the like and defrosting is necessary, defrosting can be performed automatically and promptly at an appropriate timing.

  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.

  Further, 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 on-vehicle use, but can be used for personal use at home and for hospital use. It can be widely deployed and used 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 22 Controller 25 Cooling chamber
26 Circulating fan 27 Dew receiving bowl 28 Air outlet
29 Return air passage 30 Extension duct 31 Air temperature sensor
32 Room temperature sensor A User

Claims (3)

A compressor, a condenser, and an evaporator are annularly connected to form a refrigeration cycle, and the evaporator in the refrigeration cycle is formed by a heat insulating wall body having a circulation fan, a blowout air passage, and a return air passage. Cold air generated by a cooling unit that is housed in a cooling chamber and has the compressor, the condenser, and a heat radiating fan that cools the compressor, and is blown out to the object to be cooled by the circulation fan and the blowing air passage, In the temperature control device that circulates back to the return air path,
An air temperature sensor provided in the return air path detects a temperature of the return cold air and a room temperature sensor that detects a room temperature in which the cooling unit is installed is provided, and a detection temperature of the room temperature sensor, the room temperature sensor, the air temperature sensor, And a temperature difference between the refrigeration cycle and the temperature control device.   The room temperature sensor detects a temperature lower than a predetermined value, and when the temperature difference between the air temperature sensor and the room temperature sensor is larger than the predetermined value, the operation of the compressor in the refrigeration cycle is stopped for a predetermined time. The temperature control device according to claim 1.   The cooling target of the cooling unit can be selected from at least one of a cooling mat that cools by introducing cold air into the internal cavity and an arbitrary space that is cooled by an extension duct attached to the blowout air passage. The temperature control device according to claim 1.

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