JP2017197065A - Vehicular deflector device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular deflector device which enables reduction of travel resistance of a vehicle while maintaining good freezing efficiency of a refrigerator.SOLUTION: The application includes: a cab; a cabo box mounted at a rear side of the cab and having an introduction port located at a front upper part and used to introduce travel wind to a condenser of a refrigerator; a movable deflector provided on an upper surface of the cab; load detection means which detects a refrigeration load of the refrigerator; and control means which controls an inclined angle of the movable deflector according to the refrigeration load.SELECTED DRAWING: Figure 1

Description

  The present disclosure relates to a vehicle deflector device for reducing air resistance that a vehicle receives during traveling.

  In a traveling vehicle, air resistance is generated by traveling wind received from the front of the vehicle. For example, in a commercial vehicle such as a truck having a cargo box behind the cab, it is known that an air resistance is generated when a traveling wind hits a step existing between the upper surface of the cab and the upper surface of the cargo box. Patent Document 1 discloses a vehicle in which a vehicle deflector for rectifying traveling wind received from the front of the vehicle to the rear of the vehicle is provided on the upper surface of the cab in order to reduce the air resistance caused by such a step. Yes.

  Patent Document 2 discloses a refrigerated vehicle capable of transporting cargo while keeping the inside of the cargo box 4 at a low temperature by a refrigerator built in the vehicle body as an example of a commercial vehicle having a cargo box. In this document, in particular, the condenser unit constituting the refrigerator is arranged at the front end of the packing box, so that heat exchange using traveling air is performed in the condenser unit.

JP 2013-129263 A JP-A-8-159539

  As in Patent Document 2, reduction in air resistance is also desired for a refrigerated vehicle in which heat exchange using traveling wind is performed in a condenser unit arranged at the front end of the packing box. In response to such a demand, it is conceivable to apply a technique for rectifying the traveling wind from the front of the vehicle by providing a deflector on the upper surface of the cab as in Patent Document 1, for example. However, if a deflector for reducing the air resistance is installed on the upper surface of the cab, the traveling wind supplied to the capacitor unit is reduced, the heat dissipation of the capacitor unit is lowered, and the refrigeration efficiency may be lowered. is there.

  At least 1 embodiment of this invention was made | formed in view of the above-mentioned situation, and it aims at providing the vehicle deflector apparatus which can reduce air resistance effectively, ensuring the refrigerating efficiency of a refrigerator favorable. And

  In order to solve the above problems, a vehicle deflector device according to at least one embodiment of the present invention is mounted on a cab and on the rear side of the cab, and on the upper front side, introduces running air to a condenser of a refrigerator. , A movable deflector provided on the upper surface of the cab and capable of adjusting an inclination angle with respect to the upper surface, load detection means for detecting a refrigeration load of the refrigerator, and controlling the inclination angle of the movable deflector Control means, and when the refrigeration load detected by the load detection means is less than or equal to a predetermined threshold value, the control means is configured to reduce the air resistance during travel of the vehicle. When the inclination angle is controlled and the refrigeration load detected by the load detection means is larger than the predetermined threshold, the control means Controlling the inclination angle of the movable deflector as traveling wind when is introduced into the inlet port.

  According to the above configuration, the movable deflector for rectifying the traveling wind received from the front of the vehicle during traveling is provided on the upper surface of the cab. The inclination angle of the movable deflector can be variably controlled by the control means. The control means controls the inclination angle of the deflector based on the refrigeration load in the vehicle. Specifically, when the refrigeration load is equal to or less than a predetermined threshold, the outside air required for the refrigerator (running air used for heat exchange in the condenser unit) can be reduced, so the inclination angle of the deflector is advantageous for reducing air resistance. The first angle is controlled. On the other hand, when the refrigeration load is larger than the predetermined threshold value, the deflector inclination angle is determined by taking the traveling wind into the inlet in order to sufficiently secure the outside air required for the refrigerator (running wind used for heat exchange in the condenser unit). Is controlled to a second angle that is advantageous to the above.

  Thus, by variably controlling the tilt angle of the deflector based on the refrigeration load, it is possible to effectively reduce the air resistance while ensuring good refrigeration efficiency of the refrigerator.

It is a schematic diagram which expands and shows the cab upper part vicinity of a vehicle provided with the deflector device for vehicles concerning this embodiment from the side. It is a flowchart which shows the control content implemented by the control means of FIG. 1 for every process. It is a schematic diagram which shows the flow path of a driving | running | working wind when the angle of a movable deflector is controlled to the 1st angle by step S3 of FIG. It is a schematic diagram which shows the flow path of a driving | running | working wind when the angle of a movable deflector is controlled to the 2nd angle by step S4 of FIG.

  Hereinafter, some embodiments of the present invention will be described with reference to the accompanying drawings. However, the dimensions, materials, shapes, relative arrangements, etc. of the components described in the embodiments or shown in the drawings are not intended to limit the scope of the present invention, but are merely illustrative examples. Absent.

FIG. 1 is an enlarged schematic view showing the vicinity of the upper part of a cab of a vehicle 1 including a vehicle deflector device according to the present embodiment from the side.
The vehicle 1 is a truck vehicle in which a cab 2 and a cargo box 4 are mounted on a chassis (not shown). The cab 2 is disposed in front of the vehicle and includes side doors on both sides that are used when passengers get on and off. The cargo box 4 is a bodywork that can accommodate cargo therein, and has a substantially rectangular parallelepiped shape.

  Here, as shown in FIG. 1, the upper surface of the cab 2 is lower than the upper surface of the cargo box 4, and a step Hb is formed between the cab 2 and the cargo box 4. Since the step Hb faces the vehicle 1 substantially perpendicularly to the traveling wind received from the front during traveling, the step Hb can be a factor that generates air resistance by receiving the traveling wind from the front. As a rectifying means for reducing such air resistance, the vehicle 1 includes a movable deflector (rectifying plate) 6 for rectifying traveling wind from the front of the vehicle on the upper surface of the cab 2.

  The movable deflector 6 has a predetermined inclination angle ω toward the rear of the vehicle with respect to the substantially horizontal upper surface of the cab 2. Particularly in the present embodiment, the movable deflector 6 is a movable deflector having a variable inclination angle ω. The movable deflector 6 is configured to be rotatable about a contact 8 with the upper surface of the cab 2 by an actuator (not shown), and by driving the actuator based on a control signal from the control means 10 that is a control unit, The tilt angle ω of the movable deflector 6 can be arbitrarily controlled.

  The vehicle 1 is a refrigerated vehicle capable of transporting cargo while keeping the inside of the cargo box 4 at a low temperature. The vehicle 1 is equipped with a refrigerator (not shown) for cooling the packing box 4, and FIG. 1 particularly shows a condenser unit 14 that constitutes a condensation process in the refrigeration cycle of the refrigerator. . The condenser unit 14 has an inlet 12 for introducing running air for heat exchange with the refrigerant circulating in the refrigeration cycle. The introduction port 12 is installed in the upper part of the cargo box 4 on the side facing the front of the vehicle (that is, on the step Hb) so that the introduction port 12 faces the front of the vehicle.

  The capacitor unit may be provided at a location (for example, the lower part of the vehicle body) away from the location indicated by reference numeral 14 in FIG. 1. In this case, the traveling wind introduced from the inlet 12 It may be configured to be guided to the capacitor unit via a duct).

  The vehicle 1 also includes load detection means 16 for detecting a refrigeration load in a refrigerator included in the vehicle 1. Here, the refrigeration load detected by the load detection means 16 is detected as, for example, power consumption in the refrigerator. The detection result in the load detection means 16 is sent to the control means 10 and is used for later-described control. The control means 10 is an electronic calculator such as an ECU (Electric Control Unit).

  Then, the control content implemented in the vehicle 1 which has the said structure is demonstrated. FIG. 2 is a flowchart showing the contents of control performed by the control means 10 of FIG. 1 for each process. The control means 10 controls the inclination angle ω of the movable deflector 6 according to the refrigeration load detected by the load detection means 16 by implementing the following control method.

  First, the control means 10 acquires the power consumption P (refrigeration load) in the refrigerator from the load detection means 16 (step S1). Then, it is determined whether or not the acquired power consumption P is smaller than a preset threshold value Pth (step S2). In this step, the power consumption P, which is an actual measurement value, is compared with a threshold value Pth, which is a determination reference value, so that the tilt angle ω of the movable deflector 6 is set to a first angle ω1 or second angle ω2 (<first It is selected whether the actuator is controlled so as to be any one of the angles ω1).

  When the power consumption P is smaller than the threshold value Pth (step S2: YES), the control means 10 controls the actuator so that the inclination angle ω of the movable deflector 6 becomes the first angle ω1 (step S3). In this case, the traveling wind from the front of the vehicle forms a flow path R1 shown in FIG. 3A by the movable deflector 6 having the first angle ω1. In this flow path R1, the traveling wind from the front is rectified by the movable deflector 6 so as to flow to the rear of the vehicle along the upper surface of the cargo box without interfering with the step difference Hb on the downstream side. For this reason, it is possible to reduce the air resistance generated when the traveling wind hits the step Hb. On the other hand, in the flow path R1, since the traveling wind flows so as to avoid the introduction port 12, the heat exchange efficiency in the capacitor unit 14 is reduced by reducing the traveling wind taken from the introduction port 12. However, since the refrigeration load is relatively small, the allowable range is satisfied.

  When the power consumption P is greater than or equal to the threshold value Pth (step S2: NO), the control unit 10 controls the actuator so that the inclination angle ω of the movable deflector 6 becomes the second angle ω2 (step S4). In this case, the traveling wind from the front of the vehicle forms a flow path R2 shown in FIG. 3B by the movable deflector 6 having the second angle ω2. In this flow path R2, the traveling wind from the front is rectified by the movable deflector 6 so as to be guided to the inlet 12 on the downstream side. Therefore, when the traveling wind taken from the inlet 12 increases, the heat exchange efficiency in the condenser unit 14 is improved, and a large refrigeration load can be handled. On the other hand, in the flow path R2, since the traveling wind hits the step Hb, the air resistance increases compared to the case of FIG. 3A.

  Thus, in steps S2 to S4, priority is given to reducing the air resistance of the vehicle 1 by letting the traveling wind escape above the cargo box 4 based on the magnitude relationship between the power consumption P, which is a refrigeration load, and the threshold value Pth. Alternatively, it is determined whether to give priority to the heat exchange efficiency of the condenser unit 14 by encouraging the intake of the traveling wind at the introduction port 12, and the inclination angle ω of the movable deflector 6 is controlled. That is, when the refrigeration load (power consumption) is relatively small, the heat exchange efficiency in the condenser unit 14 may be relatively low. Therefore, the inclination angle of the movable deflector 6 is set to the first angle so that reduction of air resistance is prioritized. Controlled by ω1. On the other hand, in the case where the refrigeration load (power consumption) is relatively large, in order to improve the heat exchange efficiency of the condenser unit 14, the air resistance from the inlet 12 is increased with a notice that the air resistance increases. The inclination angle of the movable deflector 6 is controlled to the second angle ω2 so as to give priority to the capture.

  Since the first angle ω1 and the second angle ω2 vary depending on the specifications of the vehicle 1, they are determined in advance by various experimental, theoretical, or simulation methods. For example, the height (Hb) of the packing box, the distance (Lb) from the movable deflector 6 (contact 8) to the front end of the packing box 4, the distance (Lr) from the movable deflector 6 (contact 8) to the front end of the capacitor unit 14, You may calculate geometrically based on the height (Hr) of the inlet 12 with respect to the upper surface of the cab 2, the shape of the movable deflector 6, etc.

  In this embodiment, the case where the control can be performed in two stages of the first angle ω1 and the second angle ω2 based on whether or not the refrigeration load exceeds the threshold value is illustrated. It may be controllable in stages or continuously. In this case, for example, as the refrigeration load increases, the traveling wind taken from the inlet 12 increases (that is, the flow angle R1 in FIG. 3A approaches the flow path R2 in FIG. 3B). It is good to control so that it may decrease gradually. In other words, as the refrigeration load decreases, the traveling wind rectified toward the rear of the vehicle so as not to interfere with the step Hb increases (that is, the flow path R1 in FIG. 3B to the flow path R1 in FIG. 3A). The inclination angle ω may be controlled so as to gradually increase so that the inclination angle ω increases. Such a relationship between the refrigeration load and the inclination angle ω may be stored in advance in a storage unit such as a memory as a map, and may be configured to be appropriately referred to by the control unit 10.

  As described above, according to the present embodiment, the air resistance is effectively improved while the refrigeration efficiency of the refrigerator is favorably secured by variably controlling the inclination angle ω of the movable deflector 6 based on the refrigeration load. A vehicle deflector device that can be reduced can be realized.

  In the above embodiment, the case where the air flow rate to the condenser unit 14 of the refrigerator is variably controlled by controlling the movable deflector 6 based on the refrigeration load and changing the flow path of the traveling wind is exemplified. The movable deflector 6 may be controlled based on other parameters. For example, in a vehicle equipped with a Rankine cycle circuit that recovers waste heat contained in engine exhaust gas, the Rankine cycle is controlled by controlling the movable deflector 6 based on the Rankine cycle operating rate to change the flow path of the traveling wind. The amount of air blown to the capacitor included may be variably controlled.

DESCRIPTION OF SYMBOLS 1 Vehicle 2 Cab 4 Cargo box 6 Movable deflector 8 Contact 10 Control means 12 Inlet 14 Capacitor unit 16 Load detection means Hb Step

Claims (1)

With the cab,
A cargo box mounted on the rear of the cab and having an inlet for introducing a running wind into the condenser of the refrigerator at the front upper part;
A movable deflector provided on an upper surface of the cab and capable of adjusting an inclination angle with respect to the upper surface;
Load detecting means for detecting a refrigeration load of the refrigerator;
Control means for controlling the tilt angle of the movable deflector;
With
When the refrigeration load detected by the load detection means is less than or equal to a predetermined threshold, the control means controls the inclination angle of the movable deflector so as to reduce the air resistance during travel of the vehicle, and the load When the refrigeration load detected by the detection unit is larger than the predetermined threshold, the control unit controls the inclination angle of the movable deflector so that the traveling wind during traveling of the vehicle is introduced into the introduction port. Deflector device.

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