JP2009274605A - Defrosting device for vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To melt ice sticking onto a window glass 1b while materializing space saving of an engine room. <P>SOLUTION: A defrosting device 50 forces openings of bypass passages 74a, 74b to be reduced and opening of hot water piping to be gradually increased as an operation lever 60 is rotated in an arrow R direction. By so doing, the amount of heat radiated to cold wind by a heater core 73 is increased with the rotation of the operation lever 60. As a result, a temperature of air-conditioning air blown off through blowout ports 75a, 75b is increased. Since the rotating force of the operation lever 60 is transmitted to a defroster door 51 through the medium of the wire harness 53, the defroster door 51 rotates with the rotation of the operation lever 60 to gradually increase the opening of a blowout port 30. At that time, hot wind blown off from an electric blower 12 is blown off onto the window glass 1b through the blowout port 30. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle defrost device for melting ice adhering to a window glass of a vehicle.

2. Description of the Related Art Conventionally, in a vehicle defrost device, for example, as shown in Patent Document 1, a fan that sucks exhaust gas from an engine and a duct that guides exhaust gas sucked by the fan toward a window glass are arranged in an engine room. There is one in which the exhaust gas blown out from the glass is blown toward the window glass to melt the ice adhering to the window glass.
Japanese Patent Laid-Open No. 5-308561

  In the above-mentioned vehicle defrost device, exhaust gas can be blown toward the window glass to melt the ice adhering to the window glass, but a space for storing a dedicated duct or a dedicated fan is provided in the engine room. is required.

  The present invention has been made in view of the above points, and an object of the present invention is to provide a vehicle defrost device that melts ice adhering to a window glass while saving space in an engine room.

In order to achieve the above object, according to the invention described in claim 1, a blower (12) disposed in the engine room and a heat exchanger (13, 14) for releasing hot air by radiating air to the blown air from the blower. And applied to a vehicle comprising:
An air outlet (30) formed in a bonnet (20) disposed on the upper side of the engine room;
A defroster door (51) supported so as to freely open and close the outlet;
A drive device (60, 80, 81, 53, 53a) for opening the defroster door,
When the defroster door is opened by the driving device, the hot air blown from the heat exchanger is blown from the outlet to the window glass on the rear side of the bonnet.

  As a result, it is not necessary to provide a space for storing a dedicated duct or a dedicated fan in the engine room, and hot air can be blown onto the window glass. The attached ice can be melted.

  According to a second aspect of the present invention, the drive device drives the defroster door in conjunction with a temperature adjustment door of the air-conditioning air in a vehicle air-conditioning device that blows the air-conditioning air into the passenger compartment. When the door reaches a position where the temperature of the conditioned air reaches a maximum temperature, the defroster door is driven so that the air outlet is fully opened.

In the invention according to claim 3, when the temperature adjusting door is located at a position where the temperature of the conditioned air is an intermediate temperature, the defroster door fully closes the outlet.
The drive device is configured to gradually open the air outlet from the fully closed state as the temperature adjusting door is displaced from a position where the temperature of the conditioned air is an intermediate temperature toward a position where the temperature reaches the maximum temperature. The defroster door is driven.

  In the invention according to claim 4, the defroster door is provided with a guide (53) for guiding the warm air so as to blow the warm air from the outlet through the width direction of the window glass. It is characterized by.

In the invention according to claim 5, the defroster door includes a plate-like door (51 a) arranged in the air outlet and a rotating shaft (52) arranged in the vehicle front-rear direction middle portion of the plate-like door. )
The plate door is configured to open and close the air outlet by rotating about the rotation axis,
When the defroster door opens the air outlet, the plate-like door is inclined with respect to the vehicle front-rear direction, and the hot air is guided by the plate-like door to blow out the window glass. It is characterized by.

  In addition, the code | symbol in the bracket | parenthesis of each means described in this column and the claim shows the correspondence with the specific means as described in embodiment mentioned later.

(First embodiment)
1 to 3 show a first embodiment of a special vehicle to which a vehicle defrost device according to the present invention is applied. FIG. 1 is a view of a special vehicle as viewed from the vehicle width direction, and FIG. 2 is a view of the special vehicle as viewed from the front of the vehicle. FIG. 3 is an enlarged view of portion A in FIG. In FIG. 1, the rear arrow indicates the vehicle rear side, and the front arrow indicates the vehicle front side.

  The special vehicle of this embodiment is a general term for large construction machines such as bulldozers and excavators and agricultural machines such as tractors.

  Hereinafter, the special vehicle of this embodiment is demonstrated.

  On the rear side of the special vehicle, as shown in FIGS. 1 and 2, a cabin 1 constituting a passenger compartment (driver's cab) is provided. Cabin frames 1 a are arranged at the four corners of the cabin 1. A driver's seat 2 and a steering wheel 3 are provided in the cabin 1.

  A window glass 1 b is disposed on the front side of the cabin 1. An engine room 10 is provided on the front side of the cabin 1. In the engine room 10, an electric blower 12, a radiator 13, and a condenser 14 are disposed on the front side of the engine 11.

  The electric blower 12 is disposed on the rear side of the radiator 13. The radiator 13 is disposed on the rear side of the capacitor 14. The electric blower 12 allows air (air outside the passenger compartment) to pass through the radiator 13 and the condenser 14 as indicated by an arrow Y.

  The radiator 13 is a heat exchanger that cools the engine cooling water by dissipating heat from the engine cooling water to the air blown from the electric blower 12.

  The condenser 14 constitutes a refrigeration cycle apparatus together with an evaporator described later, and is a heat exchanger that cools the refrigerant by dissipating heat from the refrigerant to the blown air from the electric blower 12. A bonnet 20 constituting a trunk lit is provided on the upper side of the engine room 10.

  Next, the configuration of the defrost device 50 will be described.

  First, the defrost device 50 includes a defroster door 51 as shown in FIG. The defroster door 51 is a door that opens and closes the air outlet 30 of the bonnet 20. The blower outlet 30 is an opening that opens upward in the bonnet 20.

  The defroster door 51 includes a plate-like door 51 a arranged in the air outlet 30, and a rotating shaft 52 arranged on the front side of the plate-like door 51 a and rotatably supported with respect to the bonnet 20. The plate-like door 51 a rotates (swings) about the rotation shaft 52 to open and close the rear side of the outlet 30.

  A lever 52a is provided on the back side of the plate-like door 51a, and the lever 52a is formed so as to protrude from the plate-like door 51a to the engine room 10 inside. The lever 52a is fixed to the plate door 51a.

  Thereby, the lever 52a rotates with the plate-like door 51a around the rotation shaft 52. One end of the wire harness 53 is connected to the distal end side of the lever 52a. The wire harness 53 is supported by a support member 64. As shown in FIG. 1, the wire harness 53 is disposed through the cabin frame 1 a to the ceiling 1 c side of the cabin 1.

  As shown in FIG. 4, the wire harness 53 is connected to the end of the operation lever 60 of the ceiling portion 1 c. FIG. 4 is an enlarged view of the ceiling 1c of the cabin 1 as viewed from the upper side of the vehicle. The operation lever 60 is formed in a rod shape. The operation lever 60 is rotatably supported with respect to the ceiling portion 1c. The operation lever 60 is operated by the driver, and rotates around the central portion 61 in the longitudinal direction.

  Here, the wire harness 53 is connected to the valve 90 via the wire harness 53a. The wire harness 53a is fixed to the wire harness 53 by a fixing member Ka.

  The valve 90 is a flow control valve that adjusts the hot water flow rate by opening and closing a hot water pipe disposed between a heater core 73 and an engine 11 described later. The hot water pipe is a pipe for circulating engine cooling water between the heater core 73 and the engine 11.

  The operation lever 60 is connected to the temperature adjusting door 76 a of the indoor air conditioning unit 70 via the link lever 80. One end of the link lever 80 is rotatably connected to the operation lever 60. One end of the link lever 80 is rotatably connected to the temperature adjusting door 71.

  The indoor air conditioning unit 70 is disposed on the ceiling 1c side. The indoor air conditioning unit 70 includes a casing 70a, an electric blower 71, an evaporator 72, and a heater core 73.

  The electric blower 71 is disposed in the casing 70a, and is a centrifugal multiblade blower that draws in air from a passenger compartment through a suction port (not shown) and blows out as indicated by an arrow W. The evaporator 72 exchanges heat between the refrigerant and the blown air from the electric blower 71, and cools the air blown out from the electric blower 71 by the evaporation of the refrigerant.

The heater core 73 is disposed on the front side of the evaporator 72, and the heater core 73 exchanges heat between the engine coolant and the cold air blown from the evaporator 72.
Cold air blown out from the evaporator 72 is heated by engine cooling water.

  A bypass passage 74a is provided on one end side (the upper side in the figure) of the heater core 73 in the vehicle width direction. A bypass passage 74b is provided on the other end side (lower side in the drawing) of the heater core 73 in the vehicle width direction. The bypass passages 74a and 74b are passages that allow the cool air from the evaporator 72 to flow through the heater core 73 to the outlets 75a and 75b. The air outlets 75a and 75b each open toward the passenger compartment.

  A temperature adjusting door 76a is disposed in the bypass passage 74a. The temperature adjusting door 76a is supported with respect to the casing 70a so as to be rotatable about a rotating shaft 77a. The temperature adjusting door 76a adjusts the opening degree of the bypass passage 74a by its rotation.

  A temperature adjusting door 76b is disposed in the bypass passage 74b. The temperature adjusting door 76b is supported with respect to the casing 70a so as to be rotatable about the rotating shaft 77b. The temperature adjusting door 76b adjusts the opening degree of the bypass passage 74b by its rotation.

  The temperature adjusting doors 76a and 76b are blown out from the air outlets 75a and 75b by changing the ratio of the amount of air passing through the bypass passages 74a and 74b and the amount of air passing through the heater core 73 by adjusting the opening of the doors. Adjust the air temperature.

  One end side of the link lever 81 is rotatably supported by the temperature adjusting door 76b. The other end side of the link lever 81 is rotatably supported by the temperature adjusting door 76a.

  The operation lever 60, the link levers 80 and 81, and the wire harnesses 53 and 53a constitute a driving device.

  Next, the operation of this embodiment will be described.

  First, in the max cool shown in FIG. 4, the temperature adjusting door 76a opens the bypass passage 74a, and the temperature adjusting door 76b opens the bypass passage 74b. The valve 90 closes the hot water pipe. For this reason, the inflow of engine cooling water to the heater core 73 is stopped.

  For this reason, some of the cool air from the evaporator 72 flows to the heater core 73 side, but heat is not exchanged with the engine coolant. Therefore, the cold air that has passed through the heater core 73 and the cold air that has passed through the bypass passages 74a and 74b are mixed and blown out from the outlets 75a and 75b into the passenger compartment as conditioned air. At this time, the air temperature of the conditioned air blown out from the outlets 75a and 75b is the lowest temperature. At this time, the defroster door 51 fully closes the outlet 30.

  Thereafter, when the operation lever 60 is rotated in the direction of the arrow R, the rotational force of the operation lever 60 is transmitted to the temperature adjusting door 76a via the link lever 80. Further, the temperature is transmitted from the temperature adjusting door 76 a to the temperature adjusting door 76 b through the link lever 81.

  Here, as the operation lever 60 rotates, the temperature adjusting door 76a rotates clockwise in FIG. The opening degree of the bypass passage 74a decreases as the temperature adjusting door 76a rotates clockwise in FIG.

  In addition, with the rotation of the operation lever 60, the temperature adjusting door 76b rotates in the direction Tb in FIG. As the temperature adjusting door 76b rotates clockwise in FIG. 5, the opening degree of the bypass passage 74b decreases.

  In addition, the rotational force of the operation lever 60 is transmitted to the valve 90 via the wire harnesses 53 and 53a. For this reason, the opening degree of the hot water pipe is gradually increased by rotating the valve 90 as the operation lever 60 rotates. That is, the amount of hot water flowing from the engine 11 to the heater core 73 increases.

  As described above, as the operation lever 60 is rotated in the direction of the arrow R, the opening degree of the bypass passages 74a and 74b is reduced, and the opening degree of the hot water pipe is gradually increased. As a result, the amount of heat radiated to the cold air by the heater core 73 increases as the operation lever 60 rotates. Accordingly, the temperature of the conditioned air blown out from the outlets 75a and 75b increases.

  Further, the rotational force of the operation lever 60 is transmitted to the defroster door 51 via the wire harness 53. For this reason, the defroster door 51 rotates with the rotation of the operation lever 60 to gradually increase the opening degree of the outlet 30.

  At this time, air blown out from the electric blower 12 is blown out from the blower outlet 30. The air is warm air heated by passing through the radiator 13 and the condenser 14. And the warm air which blown off from the blower outlet 30 is sprayed on the window glass 1b. For this reason, when ice has adhered to the window glass 1b, it can be further warmed and melted by warm air.

  Further, when the operation lever 60 is rotated to the state shown in FIG.

  At this time, the bypass passages 74a and 74b are closed, and the opening degree of the hot water pipe is maximized. As a result, the amount of heat radiated to the cold air by the heater core 73 is maximized. Therefore, the temperature of the conditioned air blown out from the outlets 75a and 75b becomes the highest temperature.

  Moreover, since the opening degree of the blower outlet 30 becomes the maximum, the air volume of the conditioned air blown from the blower outlets 75a and 75b becomes the maximum.

  In this embodiment, when the opening degree of the hot water pipe is 50%, the opening degree of the outlet 30 is 50%. The opening degree is the ratio of the opening area when the hot water pipe (or outlet) is 0% when it is fully closed and 100% when it is fully open.

  In the present embodiment described above, the defrost device 50 is configured using the defroster door 51, the temperature adjusting door 76a, the link levers 80 and 81, and the wire harnesses 53 and 53a. Therefore, it is not necessary to store in a dedicated duct or a dedicated fan engine room. For this reason, the ice adhering to the window glass can be melted while saving the space of the engine room.

(Second Embodiment)
In the above-described first embodiment, the example in which the rotation shaft 52 is arranged on the vehicle rear side of the plate-like door 51a as the defroster door 51 is shown, but instead, as shown in FIG.
As for the rotating shaft 52 of the defroster door 51, the plate-like door 51a may be arranged in the vehicle front-rear direction intermediate portion of the plate-like door 51a.

  In this case, in the defroster door 51, the plate-like door 51a is inclined with respect to the vehicle longitudinal direction and opens the rear side of the air outlet 30. Therefore, the warm air blown from the electric blower 12 is guided by the plate-like door 51a as indicated by the arrow Bb and blown to the window glass 1a. In FIG. 6, the same reference numerals as those in FIG.

(Third embodiment)
Next, a third embodiment in which a guide is provided on the defroster door to adjust the direction of hot air will be described.

  7A is a view of the defroster door 51 as viewed from the back side (inside the engine room), and FIG. 7B is a view of the defroster door 51 as viewed from the longitudinal direction of the rotation shaft 52.

  7A and 7B, the same reference numerals as those in FIG.

  A plurality of guides 53 (seven guides 53 are shown in the figure) are provided on the back side of the plate-like door 51a of the defroster door of the present embodiment. The plurality of guides 53 are arranged such that the intervals 53a are widened in the vehicle width direction from the front side toward the rear side.

  For this reason, the warm air blown out from the electric blower 12 is guided by the plurality of guides 53 and blown out in the vehicle width direction with respect to the window glass 1a. For this reason, the window glass 1a can be warmed over a vehicle width direction.

(Fourth embodiment)
In the fourth embodiment described above, the opening degree of the air outlet 30 is changed from 0% to 100% as the temperature of the conditioned air changes from the lowest temperature to the highest temperature as the opening degree of the temperature adjusting door 76a (76b) changes. However, instead of this, when the temperature of the conditioned air is an intermediate temperature, the opening degree of the outlet 30 is set to 0%, and as the temperature of the conditioned air changes from the intermediate temperature to the maximum temperature, This 4th Embodiment which changes the opening degree of the blower outlet 30 from 0% to 100% is shown.

  In the present embodiment, as shown in FIG. 9, the wire harness 53 extending from the defroster door 51 side, the wire harness 53 b extending from the operation lever 60 side, and the wire harness 53 a extending from the valve 90 side are connected via the link plate 100. ing.

  Each end part of the wire harnesses 53a and 53b is fixed to the link plate 100. A stopper 102 is provided on the end side of the wire harness 53b in a state where the wire harness 53b passes through the arc-shaped groove 101 in the link plate 100. As a result, the stopper 102 slides in the arc-shaped groove 101 of the link plate 100.

  The operation of this embodiment configured as described above will be described.

  First, in the Max School state, as shown in FIG. 8, the stopper 102 is positioned on one end side of the groove portion 101 of the link plate 100.

  Thereafter, when the operation lever 60 is operated and rotated, the temperature adjusting doors 76 a and 76 b are driven via the link levers 80 and 81. Thereby, the opening degree of the bypass passages 74a and 74b is gradually reduced.

Further, the link plate 100 is rotated clockwise through the wire harness 53b by the rotation of the operation lever 60. Along with this, the wire harness 53a is pulled to drive the valve 90 and gradually increase the opening degree of the hot water pipe. As a result, the temperature of the conditioned air gradually increases.
On the other hand, with the rotation of the link plate 100, the stopper 102 slides in the groove portion 101 of the link plate 100.

  As a result, the rotational force of the operation lever 60 is not transmitted to the defroster door 51 through the wire harness 53, and the defroster door 51 maintains a state where the blowout port 30 is fully closed.

  Thereafter, when the temperature adjusting doors 76a and 76b are driven by the rotation of the operation lever 60, and the link plate 100 drives the valve 90 via the wire harness 53a to increase the opening degree of the hot water pipe, the temperature of the conditioned air becomes intermediate. Reach temperature.

  Further, when the operation lever 60 is operated to rotate the link plate 100, the stopper 102 reaches the other end in the groove portion 101 of the link plate 100 as shown in FIG. Thereafter, when the link plate 100 further rotates, the link plate 100 pulls the wire harness 53 to transmit the rotational force to the defroster door 51. For this reason, the defroster door 51 gradually increases the opening degree of the air outlet 30 from the fully closed state.

  Further, when the link plate 100 is rotated to the state shown in FIG. At this time, the defroster door 51 is in a state where the air outlet 30 is fully opened.

  According to this embodiment described above, as the temperature adjusting doors 76a and 76b are displaced from the position where the conditioned air temperature is the intermediate temperature toward the maximum temperature, the defroster door 55 opens all the outlets 30. The opening is gradually increased from the closed state.

(Other embodiments)
In each of the above-described embodiments, an example in which the defroster door 51 and the valve 90 are driven by the operation lever 60 has been described, but instead, the defroster door 51 and the valve 90 may be driven by an electric motor.

It is a figure showing a 1st embodiment of a special vehicle in a 1st embodiment of the present invention. It is the figure which looked at the special vehicle in FIG. 1 from the vehicle front. It is an enlarged view of A part in FIG. It is the enlarged view which looked at the ceiling part of the cabin from the vehicle upper side. It is the enlarged view which looked at the ceiling part of the cabin from the vehicle upper side. It is a figure which shows the defroster door in 2nd Embodiment of this invention. It is a figure which shows the defroster door in 3rd Embodiment of this invention. It is a figure which shows the link plate in 4th Embodiment of this invention. It is a figure which shows the link plate in the above-mentioned 4th Embodiment. It is a figure which shows the link plate in the above-mentioned 4th Embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Cabin 10 Engine room 11 Engine 20 Bonnet 30 Outlet 51a Plate-shaped door 52a Lever 53 Wire harness 52 Rotating shaft 70 Indoor air conditioning unit 70a Casing,
DESCRIPTION OF SYMBOLS 71 Electric blower 72 Evaporator 73 Heater core 75a Outlet 75b Outlet 76a Temperature adjustment door 76b Temperature adjustment door 80 Link lever 81 Link lever 90 Valve

Claims (5)

It is applied to a vehicle including a blower (12) arranged in an engine room and a heat exchanger (13, 14) that radiates heat to the blown air from the blower and blows out hot air.
An air outlet (30) formed in a bonnet (20) disposed on the upper side of the engine room;
A defroster door (51) supported so as to freely open and close the outlet;
A drive device (60, 80, 81, 53, 53a) for opening the defroster door,
A vehicle characterized in that when the defroster door is opened by the driving device, warm air blown from the heat exchanger is blown from the outlet to a window glass on the rear side of the bonnet of the vehicle. Defrost equipment.   The driving device drives the defroster door in conjunction with a temperature adjusting door for the air conditioning air in the vehicle air conditioning device that blows the air conditioning air into the vehicle interior, and the temperature adjusting door has the highest temperature of the air conditioning air. 2. The vehicle defrost device according to claim 1, wherein the defroster door is driven so that the air outlet is fully opened when the temperature reaches a position. When the temperature adjusting door is located at a position where the temperature of the conditioned air is an intermediate temperature, the defroster door is configured to fully close the outlet.
The drive device is configured to gradually open the air outlet from the fully closed state as the temperature adjusting door is displaced from a position where the temperature of the conditioned air is an intermediate temperature toward a position where the temperature reaches the maximum temperature. The vehicle defrost device according to claim 2, wherein the defroster door is driven.   The guide (53) which guides a warm air is provided in the said defroster door so that a warm air may be blown over the vehicle width direction of the said window glass from the said blower outlet. The vehicle defrost device according to any one of the above. The defroster door includes a plate-like door (51a) arranged in the outlet, and a rotating shaft (52) arranged in a middle portion in the vehicle front-rear direction of the plate-like door,
The plate door is configured to open and close the air outlet by rotating about the rotation axis,
When the defroster door opens the air outlet, the plate-like door is inclined with respect to the vehicle front-rear direction, and the hot air is guided by the plate-like door to blow out the window glass. The vehicle defrost device according to any one of claims 1 to 4, wherein the vehicle defrost device is provided.

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