JP2013073533A - Temperature control device and temperature control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature control device and a temperature control method of electrical equipment or an electronic component device loaded on a vehicle and construction machinery configured by adding a heating function at low temperature without making it unnecessary to install any new heat source by using coolant to be used for an engine cooling circuit of a main power source as a heat source.SOLUTION: In order to control electrical equipment or an electronic component device loaded on a vehicle and construction machinery loaded with an engine in a proper temperature range, when the temperature of the electrical equipment or the electronic component device is lower than first temperature, the waste heat of engine coolant is used to warm the electrical equipment or the electronic component device, and when the temperature of the electrical equipment or the electronic component device is higher than second temperature, the electrical equipment or the electronic component device is cooled with coolant cooled by an exclusive cooling device for controlling the electrical equipment or the electronic component device in the range of the first temperature and the second temperature. Thus, it is possible to control the electrical equipment or the electronic component device in the proper temperature range even under any environmental temperature by switching a switching valve in accordance with the temperature detected by a temperature sensor.

Description

  The present invention relates to a temperature control device for allowing an electric device or an electronic component device mounted on a hybrid type vehicle and a construction machine equipped with both engine and motor drive devices to continue to operate normally at any external environmental temperature, and This relates to a temperature control method, which uses an engine cooling circuit at a low temperature to warm an electrical device or electronic component device using a coolant whose temperature has been increased by heat generated by the engine, and at a higher temperature than an engine coolant. By switching to a specially equipped cooling circuit to control to a low temperature range, it cools electrical equipment or electronic components without requiring new parts such as heaters not only at high temperatures but also at low temperatures. In particular, the present invention relates to a temperature control device and a temperature control method that enable temperature control.

  Conventionally, in hybrid type vehicles and construction machines equipped with both engine and motor drive devices, control of abnormal temperature rises in electric devices such as electric motors and generators or electronic component devices that control these electric devices. Therefore, various cooling devices and cooling methods are employed. For example, Patent Document 1 describes a cooling device and a cooling method for an electric / electronic device mounted on a hybrid hydraulic excavator. The arrangement of the cooling device or a cooling method is described in order to avoid adverse effects due to a temperature rise.

  However, in many cases, vehicles and construction machines operate even under extremely cold conditions such as an air temperature of −40 ° C. In this case, it is obvious that measures for low temperature of electric equipment or electronic component devices are also required.

  In the present invention, the process taken when the vehicle and the construction machine are operated in an extremely cold time is examined. In addition, the present invention provides a cooling / warming circuit that can be efficiently operated even in high temperature and low temperature environments.

JP 2010-270555 A

  In general, with regard to the influence of the external environmental temperature of electrical equipment or electronic component devices mounted on vehicles and construction machinery etc. equipped with engines, etc., high temperature countermeasures are mainly preceded, and various cooling devices are installed. There was no function to warm the electrical equipment or electronic component device at the time. However, since construction machines and the like often operate in extremely cold regions and require quick start of work when starting at low temperatures, it is necessary to equip equipment warming functions at low temperatures. The coolant used in the engine cooling circuit is used as a heat source. When the ambient temperature is low, the warmed coolant is used. When the temperature is high, the engine is switched to a dedicated cooling circuit to control the temperature range lower than the engine coolant. It aims at adding the warming function at the time of low temperature, without requiring a new heat source by switching by a valve.

  In order to achieve the above object, a temperature control device according to the present invention provides an electric device or electronic component for controlling an electric device or electronic component device mounted on a vehicle equipped with an engine and a construction machine to an appropriate temperature range. When the device is cooler than the first temperature, the electrical equipment or electronic component device is warmed using the residual heat of the engine coolant, and when the electrical device or electronic component device is hotter than the second temperature, the electrical In order to cool the electric device or electronic component device with a coolant cooled by a dedicated cooling device to control the device or electronic component device to the first temperature range and the second temperature range, the temperature sensor detects By switching the switching valve according to temperature, select whether the device connected to the electrical equipment or electronic component device is an engine cooling device or a dedicated cooling device And controlling the proper temperature range in any environment temperatures by Rukoto.

  The switching valve is connected to a control unit connected to the temperature sensor, and when the temperature sensor detects a temperature higher than the second temperature, the switching valve receives the pressure oil discharged from the pilot pump to drive the spool. It is characterized by changing.

  In order to achieve the above object, a temperature control method according to the present invention is a method for controlling an electric device or an electronic component device mounted on a vehicle equipped with an engine and a construction machine to an appropriate temperature range, and the electric device or When the electronic component device is lower than the first temperature, warm the electric device or electronic component device using the residual heat of the engine coolant, and when the electric device or electronic component device is higher than the second temperature, In order to cool the electric device or electronic component device with a coolant cooled by a dedicated cooling device in order to control the electric device or electronic component device to a range between the first temperature and the second temperature, a temperature sensor Whether the device connected to the electrical equipment or electronic component device is an engine cooling device or a dedicated cooling device by switching the switching valve according to the detected temperature And controlling the proper temperature range in any environment temperatures by selecting.

  Further, the switching valve is connected to a control unit connected to the temperature sensor, and when the temperature sensor detects a temperature higher than the second temperature, the switching valve receives the pressure oil discharged from the pilot pump and drives the spool. It is characterized by changing.

  According to the present invention, a cooling device is mainly mounted as a countermeasure for high temperature with respect to the influence of the environmental temperature of electrical equipment or electronic component devices mounted on vehicles and construction machines mounted with engines and the like. The warming function of the electrical equipment or electronic component device as a countermeasure was not provided. However, since construction machines and the like often operate in extremely cold regions and require quick start of work when starting at low temperatures, it is necessary to equip equipment warming functions at low temperatures. By using the coolant used in the cooling circuit as a heat source, it is possible to add a warming function at low temperatures without the need for a new heat source. It is possible to fasten.

It is a block diagram of the temperature control apparatus which concerns on this invention. It is a block diagram of the temperature control apparatus which concerns on this invention. It is an operation | movement diagram with respect to the temperature of the solenoid in the temperature control apparatus which concerns on this invention. It is an operation | movement diagram with respect to the temperature of the water pump in the temperature control apparatus which concerns on this invention.

  Hereinafter, preferred embodiments of the present invention will be described in detail.

  The temperature control device 2 according to the present invention is a device for controlling the temperature of the inverter 4 and the electric motor 6, and uses the cooling liquid sent to the inverter 4 and the electric motor 6 as the cooling liquid via the engine 8 or the electric equipment to be mounted. Alternatively, it is a device that controls the temperature by switching the switching valve 12 to determine whether to use the coolant via the radiator 10 equipped exclusively for the electronic component device. Details will be described with reference to FIGS.

  FIG. 1 shows a temperature control device 2 according to the present invention. In particular, the flow of hydraulic signals and electrical signals in the temperature control device 2 when the environmental temperature is 20 ° C. or higher is shown by arrows.

  The inverter 4 is a power converter and a power source for driving the electric motor 6. In this embodiment, the power supply line is not shown. On the other hand, piping (not shown) of coolant for cooling the inside of the inverter is provided in the inverter. External ports 15 and 16 are provided at the ends of the inverter 4 body. The external port 15 is connected to the switching valve 12 via the pipe 20.

  The electric motor 6 is an electric motor for driving the construction machine according to the present invention. Since the electric motor 6 becomes a high temperature during driving, a piping (not shown) of a cooling liquid for cooling is provided in the interior in the same manner as the inverter 4. Ports of this piping are provided at the end of the electric motor 6 as 22 and 24. The port 16 of the inverter 4 and the port 22 of the electric motor 6 are connected by a pipe 26. The port 24 is connected to the switching valve 12 through a pipe 28.

  The engine 8 is provided with piping for cooling, but a water jacket 30 for cooling more extensively covers the engine, and the water jacket 30 is connected to the first radiator 34 via the piping 32. Connected. The pipe 32 is also connected to the pipe 36 of the switching valve 12.

  The first radiator 34 is connected to a thermostat valve 38 via a pipe 37. Between the first radiator 34 and the engine body, a first radiator cooling propeller 40 attached to the rotating shaft of the engine is provided. The rotation of the first radiator cooling propeller 40 cools the coolant in the first radiator 34.

  The thermostat valve 38 is connected to the first water pump 44 via a pipe 42. The thermostat valve 38 is a valve that controls opening and closing of the coolant that passes through the valve depending on the temperature of the coolant. The thermostat valve 38 is also connected to the pipe 54 from the switching valve 12.

  The first water pump 44 is connected to the water jacket 30 via a pipe 48. The first water pump 44 is driven by the engine 8 or hydraulic pressure or electric drive, and operates to send the coolant in the pipe from the first radiator 34 to the water jacket 30 with a screw provided in the pipe.

  The second radiator 10 is a device that cools the cooling liquid in the same manner as the first radiator 34, and is an air-cooled type that causes convection by a propeller fan, a water-cooled type that is cooled by other water, a halogenated hydrocarbon, butane, A cooling device such as a compressor type using a refrigerant such as isobutane, hydrogen, helium, ammonia, water, carbon dioxide, or a Peltier type using a Peltier element can be used. In the second radiator 10, there is a pipe through which a coolant such as a cooling liquid passes, and ports 46 and 50 are provided at the end of the second radiator 10 as ports. The port 46 is connected to the switching valve 12 by a pipe 45. The port 50 is connected to the second water pump 53 via a pipe 52.

  In the switching valve 12, a spool 56 is disposed at the center of the housing 14, the pipes 36 and 54 are engine cooling lines, the pipe 45 is connected to the second radiator 10 line, and the pipe line 28 is the port 24 of the electric motor 6. Connected to On the other hand, the pipe 20 is connected to 15 which is a port of the inverter 4. 56a, 56b, and 56c are large diameter portions of the spool 56, and 56d and 56e are small diameter portions of the spool 56.

  The switching valve 12 has ports 58a, 58b, 58c, 58d, and 58e. The port 58a is connected to the pipe 20 and is also connected to the check valve 60 at the same time. The port 58b is connected to the pipe 28. The port 58c is connected to the pipe 36. The port 58d is connected to the pipe 45. The port 58e is connected to the pipe 54.

  Both ends of the spool 56 are housed in caps 60a and 60b, and an oil chamber 62 is formed between the spool 56 and the cap 60a. Pilot oil pressure from a solenoid valve 64 is supplied to the oil chamber 62 through a port 66. A spring 68 for returning the spool 56 to neutral is provided in the cap 60b.

  In FIG. 1, the spool 56 is positioned at the end on the side without the spring 68. At this time, the port 58a corresponds to the small diameter portion 56d of the spool 56, and the port 58c corresponds to the large diameter portion 56b of the spool 56. Therefore, the port 58a and the port 58c do not communicate with any port. On the other hand, since the port 58b and the port 58d correspond to the small diameter portion 56e of the spool 56, the port 58b and the port 58d communicate with each other. However, since the port 58e corresponds to the large diameter portion 56c of the spool 56, the port 58e does not communicate.

  The input side of the second water pump 53 is connected to the port 50 of the second radiator 10 via a pipe 52, and is connected to the check valve 60 via a pipe 70. The second water pump 53 is electrically connected by a controller 74 and a conducting wire 76. The check valve 60 is connected to the port 15 of the inverter 4 and the port 58 a of the switching valve 12 through the pipe 20.

  The temperature sensor 78 is connected to the pipe 20 and measures its temperature. The temperature sensor 78 is electrically connected to the controller 74. The controller 74 is connected to an electromagnetic coil of the solenoid valve 64.

  The solenoid valve 64 is connected to the port 66 of the switching valve 12 via a pipe 80. On the other hand, the solenoid valve 64 is connected to a tank line 84 connected to the tank 82 and a pump line 88 connected to the pilot pump 86. A relief valve 90 is provided between the tank line 84 and the pump line 88. The pilot pump 86 is also connected to the tank 82.

  The operation of the temperature control device 2 according to the present invention in the state shown in FIG. 1 will be described above.

  In this case, it is assumed that the environmental temperature is 20 ° C. or higher. When the coolant inlet temperature of the control target device becomes 20 ° C. or higher, the temperature sensor 78 detects the temperature of the coolant passing through the pipe 20 between the check valve 60 and the inverter 4.

  This temperature sensor operates as shown in the solenoid valve control diagram shown in FIG. 3, and the solenoid valve 64 is turned off by the controller 74 at 20 ° C. or higher. Below 0 ° C., the solenoid valve 64 is turned on by the controller 74. However, the temperature change characteristic has a hysteresis characteristic, and when the temperature changes from low temperature to high temperature, the solenoid valve 64 is turned off until it rises to 20 ° C., but when it changes from high temperature to low temperature. Is turned on after falling to 0 ° C. Therefore, ON / OFF between 0 ° C. and 20 ° C. depends on the temperature so far.

  Assuming the above characteristics, the temperature sensor 78 detects a temperature of 20 ° C. or higher when the coolant inlet temperature of the control target device in FIG. The controller 74 detects that the temperature detected by the temperature sensor 78 is 20 ° C. or higher, so the solenoid valve 64 is closed and the spool 56 of the switching valve 12 is in the current state. That is, since the pipe 80 is reduced to the tank pressure, the spool 56 is stopped on the upper side of the drawing by the spring force of the spring 68.

  On the other hand, according to FIG. 4, the second water pump 53 has characteristics opposite to those of the solenoid valve 64. The second water pump 53 is turned off by the controller 74 at 0 ° C. or lower. Above 20 ° C., the second water pump 53 is turned on by the controller 74. However, the temperature change characteristic has a hysteresis characteristic. When the temperature is changed from low temperature to high temperature, the second water pump 53 is turned on until it rises to 20 ° C., but changes from high temperature to low temperature. When turning off, the temperature drops to 0 ° C and then turns OFF. Therefore, ON / OFF between 0 ° C. and 20 ° C. depends on the temperature so far.

  Due to the above characteristics, the second water pump 53 is turned on at 20 ° C. or higher. Accordingly, the coolant discharged from the second water pump 53 pushes open the check valve 60, cools the inverter 4 and the electric motor 6 through the pipe 20, and becomes hot at the port 58 b of the switching valve 12 through the pipe 28. Then, it returns to the second radiator 10 from the port 58d via the pipe 45 and is cooled. The cooled coolant is returned to the second water pump 53 via the pipe 52 and continued.

  On the other hand, since the port 58c and the port 58e of the switching valve 12 are closed, the coolant from the engine 8 is not sent to other devices.

  Subsequently, the operation when the environmental temperature is 0 ° C. or lower will be described with reference to FIG.

  The temperature sensor 78 detects a temperature of 0 ° C. or lower when the coolant inlet temperature of the device to be controlled in FIG. 2 becomes 0 ° C. or lower. In the controller 74, since the temperature detected by the temperature sensor 78 is 0 ° C. or less, the solenoid valve 64 is opened, and the spool 56 is located in the lower part of the drawing from the high temperature state shown in FIG. That is, since the pipe 80 rises to the pressure set by the relief valve, the spool 56 overcomes the spring force of the spring 68 and stops at the lower side of the drawing. For this reason, since the port 58a and the port 58c correspond to the spool 56 small diameter part 56d, both ports communicate. Further, since the port 58b and the port 58e correspond to the small diameter portion 56d of the spool 56, both ports communicate with each other. Further, the second water pump 53 is OFF as a characteristic.

  Accordingly, the coolant of the engine 8 enters the switching valve 12 from the port 58 c through the pipe 32 and the pipe 36, and flows from the port 58 a to the inverter 4 and the electric motor 6 through the pipe 20. The coolant flowing out from the motor port 24 flows into the port 58b of the switching valve 12 through the pipe 28, flows out of the port 58e, and is sucked into the first water pump 44 through the pipe 54 through the thermostat valve 38. , The flow continues. At this time, in the water jacket 30 located around the cylinder in the engine 8, heat exchange between the water jacket 30 main body and the engine coolant is performed. Due to this heat exchange, the coolant becomes high temperature, and the inverter 4 and the electric motor 6 are warmed via the switching valve 12. Still, when the temperature sensor 78 rises to 20 ° C. or more, it switches to the second radiator 10.

2 Temperature control device 4 Inverter 6 Electric motor 8 Engine 10 Second radiator 12 Switching valve 14 Housing 15 Port 16 Port 20 Piping 22 and 24 Port 26 Piping 28 Piping 30 Water jacket 32 Piping 34 First radiator 36 Piping 37 Piping 38 Thermostat Valve 40 First radiator cooling propeller 42 Piping 44 First water pump 45 Piping 46 Port 48 Piping 50 Port 52 Piping 53 Second water pump 56 Spool 36, 54 Piping 56a, 56b, 56c Large diameter portion of spool,
56d, 56e Spool small diameter portion 58a, 58b, 58c, 58d, 58e Port 60 Check valve 60a, 60b Cap 62 Oil chamber 64 Solenoid valve 66 Port 68 Spring 70 Piping 76 Lead wire 74 Controller 78 Temperature sensor 80 Piping 82 Tank 84 Tank line 86 Pilot pump 88 Pump line 90 Relief valve

Claims (4)

In order to control the electric device or electronic component device mounted on the vehicle and the construction machine on which the engine is mounted to an appropriate temperature range, when the electric device or electronic component device is lower than the first temperature, When the electric device or electronic component device is warmed using residual heat and the electric device or electronic component device is higher than the second temperature, the electric device or electronic component device is set to the first temperature and the second temperature. In order to cool the electrical equipment or electronic component device with a coolant cooled by a dedicated cooling device in order to control to the range of
By switching the switching valve according to the temperature detected by the temperature sensor, it is possible to select any environmental temperature by selecting whether the device connected to the electric device or electronic component device is an engine cooling device or a dedicated cooling device. A temperature control device characterized by controlling to an appropriate temperature range even underneath.   The switching valve is connected to a control unit connected to the temperature sensor, and when the temperature sensor detects a temperature higher than the second temperature, it changes the flow path by receiving the pressure oil discharged from the pilot pump and driving the spool. The temperature control device according to claim 1, wherein: A method for controlling an electric device or an electronic component device mounted on a vehicle and a construction machine on which an engine is mounted to an appropriate temperature range, wherein the engine cooling is performed when the electric device or the electronic component device is lower than a first temperature. When the electric device or electronic component device is warmed using the remaining heat of the liquid and the electric device or electronic component device is higher than the second temperature, the electric device or electronic component device is set to the first temperature and the second temperature. In order to cool the electric device or electronic component device with a coolant cooled by a dedicated cooling device to control the temperature range of
By switching the switching valve according to the temperature detected by the temperature sensor, it is possible to select any environmental temperature by selecting whether the device connected to the electric device or electronic component device is an engine cooling device or a dedicated cooling device. The temperature control method characterized by controlling to an appropriate temperature range also under.   The switching valve is connected to a control unit connected to the temperature sensor, and when the temperature sensor detects a temperature higher than the second temperature, it changes the flow path by receiving the pressure oil discharged from the pilot pump and driving the spool. The temperature control method according to claim 3, wherein:

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