JPS61115756A - Hot washer apparatus for vehicle - Google Patents

Abstract

PURPOSE:To effectually remove frozen materials on a window glass at cold temperature by installing hot window washer means including a heat exchanger with superior heat exchanging rate and keeping warm ability. CONSTITUTION:Sealed vessel 4 for a heat exchanger is installed on passages 51 and 52 supplying washer liquid to a nozzle 3 and on the routes of circulating passages 61 and 62 for circulating a heat medium. The sealed vessel 4 includes an adiabatic layer 41 at its whole periphery and the inside of the vessel 4 is divided into upper and lower chamber 4a and 4b by a partition wall 42 having good thermal conduction. The pointed end of the pipe 51 sending out the washer liquid from a washer tank 2 is opened in the lower portion of the upper chamber 4a, and the pointed end of the pipe 52 communicating the nozzle 3 is opened in the upper portion of the upper chamber 4a. Further, a heat medium supplying source 1 is coupled with the lower chamber 4b through the pipes 61 and 62.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention is directed to a hot windshield that supplies high-temperature washer fluid to a window washer nozzle of a vehicle. This article relates to the Wotsunya device, and particularly to the structure of the heat exchanger used in this device.

[Conventional technology]

A hot window washer device supplies high-temperature washer fluid to a window washer nozzle, and is capable of effectively melting and cleaning frozen matter from vehicle window glass, especially in cold weather.

In such a washer device, a heat exchanger is provided in the washer fluid supply path, and one in which the washer fluid is heated by engine cooling water or the like introduced as a heat medium has been proposed (Japanese Patent Application Laid-Open No. 1983-1999). No. 53549), it is economical in that it does not require a special heater. Here, there is a need for a heat exchanger with a simple structure and high efficiency for use in the above-mentioned washer device.

[Problem that the invention seeks to solve]

In view of such demands, an object of the present invention is to provide a hot window bathing device that has a simple structure and is equipped with a heat exchanger that is excellent in heat exchange efficiency and heat retention. .

[Means for solving problems]

The configuration of the present invention is shown in FIG. In the figure, 1 is an engine as a heat medium supply source, 2 is a washer tank, and 3 is a nozzle. A sealed container 4 for heat exchange is provided midway between the supply passage 51.52 for supplying washer fluid to the nozzle/I/3 and the circulation passage 61.62 for circulating the heat medium.

The sealed container 4 has a heat insulating layer 41 around the entire circumference, and the inside of the container is partitioned into an upper chamber 4a and a lower chamber 4b by a partition wall 42 having good thermal conductivity.

The tip of the washer fluid delivery pipe 51 that delivers the washer fluid from the washer tank 2 is opened at the lower part of the upper chamber 4a, and the end of the washer fluid supply pipe 52 that supplies the washer fluid from the delivery pipe 51 to the nozzle A/3. is opened at the upper part of the upper chamber 4a. Further, the tip of the heat medium delivery pipe 61 that sends out the heat medium from the supply source 1 is opened at the lower part of the lower chamber 4b, and the heat medium reflux vibro 2 that causes the heat medium from the delivery vibro 1 to flow back to the supply source. The tip is opened at the upper part of the lower chamber 4b.

[Action and effect of the invention]

The high-temperature heat medium flows into the lower chamber 4b through the heat medium delivery vibro 1 opened at the bottom of the lower chamber 4b, quickly rises, and heats the washer liquid in the upper chamber 4a via the partition wall 42. , f! opens near the partition wall 42. Medium reflux vibro 2
It leaks out. Convection occurs in the upper chamber 4a due to heating,
The entire temperature of the washer fluid is quickly raised.

A washer fluid delivery pipe 51 that opens at the bottom of the upper chamber 4a
The lower-temperature washer liquid flowing in forms a layer without mixing with the heated high-temperature washer liquid and stays in the lower part of the upper chamber 4a, and flows out through the washer liquid supply pipe 52 and reaches the nozzle y3.

Further, the heated washer fluid is effectively kept warm by the heat insulating layer formed around the entire circumference of the sealed container 4.

As can be seen, the sealed container for heat exchange provided in the hot water brewing apparatus of the present invention has a simple structure and is excellent in instant heating properties and heat retention properties.

[Example 1] In Fig. 1, 1 is a water-cooled vehicle engine, and the carrot cooling water discharged from the water pump unit absorbs the heat generated by the engine 1 while flowing through the water jacket 12. Temperature rises. Most of the warmed cooling water flows into the radiator 13, is cooled, and circulates within the engine 1 again. On the other hand, a portion of the warmed cooling water is sent to the heat exchange sealed container 4, the detailed structure of which will be described later, through a heat medium delivery pipe 61t branched to the outlet of the water jacket 12. The cooling water sent to the sealed container 4 is returned to the suction side of the water pump 11 by the heat medium reflux vibro 2. The delivery vibro 1 is provided with a solenoid valve 63 for water passage, which is opened when the cooling water in the water jacket 12 rises to a predetermined temperature or higher in response to an output signal from a water temperature detector in the circuit.

The washer fluid stored in the washer tank 2 is sent to the heat exchange sealed container 4 via the washer fluid delivery pipe 51 by a washer pump 53 that is driven by an operation switch in the vehicle interior. The washer fluid, which has been externally heated by heat exchange with the high-temperature engine cooling water in the sealed container 4, reaches the nozzle Iv3 via the washer fluid supply pipe 52.

FIG. 2 shows the detailed structure of the heat exchange sealed container n4.

The sealed container 4 is an oval spherical double container, with an inner container 43a.
and an outer container 43b arranged with a gap 41 around the outer periphery of each container 43a.

43b is manufactured by butt welding hemispheres. The gap 41 is a high-vacuum heat insulating layer of less than 0OTOrr. A partition wall 42 is provided in the inner container 43a to partition the inner container into upper and lower parts.
is formed.

The partition wall 42 is entirely curved upward in a convex shape, and a portion thereof has a protruding portion 421 that further protrudes upward in a semicircular shape. Note that as the partition wall 42, a thin metal plate such as steel μ or aluminum having good thermal conductivity is used.

The sealed container 4 has a washer liquid delivery pipe 51 from below.
A heat medium delivery vibro 1, a washer fluid supply pipe 52, and a heat medium return pipe 62 are inserted. That is,
These pipes 51, 52, 61, 62 are the planar bottom wall 431a of the inner container 43a and the outer container 431),
431b, through which the washer fluid delivery pipe 51 is inserted through the axial center of the heat medium delivery vibro 1, and the washer fluid supply pipe 52 is inserted through the axial center of the heat medium return pipe 62. Each of them is a double pipe. In this state, the inner container 43a is attached to its bottom wall 431a.
The heat medium supply vibro 1 and the heat medium return vibro 2 are fixedly supported on the outer peripheries of the heat medium supply vibro 1 and the heat medium return vibro 2, which pass through the heat medium supply vibro 1 and the heat medium return vibro 2, respectively.

The washer fluid delivery pipe 51 has its tip connected to the partition wall 4.
2 and reaches the lower part of the upper chamber 4a, and the tip thereof is bent downward so that the opening faces the upper surface of the partition wall 42. Further, the washer liquid supply pipe 52 has its tip penetrating the partition wall 42 to reach the upper part of the upper chamber 4a, and opens near the top wall 432. The tip of the heat medium delivery vibro 1 opens near the bottom wall 431a of the lower chamber 4b, and the tip of the heat medium return vibro 2 reaches the upper part of the lower chamber 4b and faces the lower surface of the top 42a of the protrusion 421 of the partition wall 42. It is open.

Note that the gap 41 forming the vacuum insulation layer is formed by the bottom wall 43xa,
The area between aslbs is larger than the other areas.

The operation of the hot water dispenser having the above structure will be explained below.

When the high temperature carrot cooling water is supplied into the lower chamber 4b through the heat medium delivery vibro 1, the high temperature cooling water is supplied to the lower chamber 41.
), the heat medium quickly moves upwardly upward in the lower chamber 4b while drawing in the low-temperature cooling water remaining in the heat medium 4b, and flows into the heat medium reflux vibro 2 opened near the top of the partition wall 42 (arrow in FIG. 2). Through this process, the inside of the lower chamber 4b is quickly replaced with high-temperature cooling water, and the washer fluid inside the upper chamber 4a is heated through the partition wall 42. At this time, the bubbles flowing into the lower chamber 4b together with the high-temperature cooling water move to the top 42a of the partition wall 42 that curves upward in a convex manner, and enter the heat medium reflux vibro 2 opened there. Inflow. Therefore, bubbles with high heat transfer resistance do not remain on the lower surface of the partition wall 42, and heat is efficiently transferred to the washer fluid. At this time, inside the upper chamber 4a, the heated washer fluid near the partition wall 42 rises, and the low-temperature washer fluid descends, creating convection, thereby quickly heating the washer fluid.

When the washer pump 53 is driven, low-temperature washer fluid is supplied into the upper chamber 4a through the washer tank 2 and the fluid delivery pipe 51. The pipe 51 may be opened at the lower part of the upper chamber 4a, and the opening may be connected to the partition wall 4.
2, the low-temperature, high-density washer fluid that flows out spreads along the partition wall 42 and mixes with the washer fluid that has already been heated to a high temperature and is present in the upper chamber 4a. The liquid forms a layer as shown by diagonal lines in the figure without mixing, and pushes up the high temperature washer liquid. The pushed up washer fluid at a temperature of 100 mL flows into the washer fluid supply pipe 52iC which opens near the top wall 432 of the upper chamber 4a (arrow in FIG. 2) and is supplied to the nozzle /I/3. In this way, only sufficiently heated washer fluid is fed to the nozzle 3.

Note that even if the engine 1 is stopped and the circulation of high-temperature cooling water is stopped, the heating of the liquid will continue due to the high-temperature cooling water that has already flowed in, and furthermore, there is a vacuum heat insulating layer around the outer periphery of the inner container 43a. Since the washer fluid is formed, the heated washer fluid is well kept warm. Furthermore, in this embodiment, since each pipe 51, 52, 61, 62 is inserted downward into the sealed container 4, the tip of each pipe 51, 52, 61, 62 inside the sealed container 4 is opening,
Therefore, convection within the pipe toward the outside of the container 4 does not occur, and heat radiation is prevented.

Also, since the gap 41 between the bottom walls 431a and 431b through which each of the pipes 51.52.61.62 passes is made larger to thicken the vacuum insulation layer, each of the pipes 51.52.61.
Heat transfer through 62 is effectively prevented.

By the way, according to the inventors' experiments, the total amount of engine cooling water and washer fluid was 1.84, and the same temperature Fjso°
When the liquid was left in a sealed container 4 at a temperature of -10° C., the liquid temperature remained at a temperature of about 50° C., which was sufficient for use even after 15 hours at an outside temperature of -10° C.

In this example, pipes 51, 61 and 5
Since the 2.62 is a double pipe, the only pipe that touches and penetrates the high vacuum gap 41 is the Vibro 1.62, and there are no welded or brazed joints that require special attention to gas leakage. This results in improved manufacturability and reliability. Furthermore, since the low-temperature washer fluid delivery pipe 51 and the high-temperature washer fluid supply pipe 52 are separated into double pipes, losses occur due to heat exchange between the low-temperature washer fluid flowing in and the high-temperature washer fluid flowing out. There isn't.

Regarding the structural strength of the sealed container 4, when the device is in operation, the upper chamber 4a is loaded with the pressurizing force of the washer pump, and the lower chamber 4'b is loaded with the engine cooling water pressure.
2 is reinforced. Furthermore, the inner container 43
A is supported and fixed to the outer container 43b via the double outer tube, that is, the vibro 1.62, which is advantageous for ensuring vibration resistance.

[Embodiment 2] In FIG. 3, a cap 48 is provided with a slight gap above the tip of the washer fluid delivery pipe 51 that opens in the upper chamber 4aK, and the washer fluid flowing out from the opening is directed toward the partition wall 42. (arrow shown). Further, the bottom wall 431a of the lower chamber 4b is made to protrude inward.
The gap 41 between 1431b and 1431b is made larger than that in the above embodiment to prevent heat radiation.

This embodiment also has the same effect as the above embodiment.

[Embodiment 3] In FIG. 4, the entire partition wall 42 is curved upward in a convex shape, with the center thereof being the apex 42a. and,
The washer fluid supply pipe 52 and the heat medium recirculation pipe 62, which constitute a double pipe, are bent toward the center of the partition wall 42 in the lower chamber 4b, and the vibro 2 is opposed to the lower surface of the top 42a at the center of the partition g42. It is well located. According to this structure K, there is no need to provide the protrusion 421 on the partition wall 42 as in each of the above embodiments.

This embodiment also has the same effects as the above embodiments.

In each of the above embodiments, the heat insulating layer does not necessarily have to be a vacuum heat insulating layer, and may be formed of a heat insulating material such as foamed urethane resin. In this case, the outer container 43
b is not particularly required.

In addition, as a heating medium, instead of engine cooling water, F-TEX
:y Shinoi lv may be used.

[Brief explanation of drawings]

FIG. 1 is an overall configuration diagram of the apparatus, and FIGS. 2 to 4 are overall sectional views of sealed containers for heat exchange showing first to third embodiments of the present invention. 1... Engine (heat medium supply source) 2...
・Washer tank 3 --- Nozzle 4 --- Sealed container for heat exchange 4a --- Upper chamber 4b --- Lower chamber 41
...Insulating layer 42...-Partition wall 42a
...Top part 43a...-Inner container 43
b...Outer container 431a, 4311)...-Bottom wall 48...-Cap 51...-Washer liquid delivery pipe 52...
・Washer fluid supply vibrator 1... - Heat medium delivery vibrator 62... - Heat medium reflux pipe 1st turn Fig. 2 Fig. 3

Claims (10)

[Claims] (1) A partition wall with a heat insulating layer and good thermal conductivity is installed around the entire circumference of the washer liquid supply passage that supplies the washer liquid to the nozzle and the heat medium circulation passage that circulates the heat medium to connect the upper chamber. A hot washer device for a vehicle is provided with a heat exchange sealed container partitioned into a lower chamber, and the end of a washer fluid delivery pipe for delivering washer fluid from a washer tank is opened at the lower part of the upper chamber. The tip of the washer fluid supply pipe that supplies the washer fluid from the washer fluid delivery pipe to the nozzle is opened in the upper part of the upper chamber, and the end of the heat medium delivery pipe that delivers the heat medium from the supply source is opened in the lower part of the lower chamber. 1. A hot washer device for a vehicle, characterized in that a heating medium recirculation pipe for causing the heating medium from the heating medium delivery pipe to flow back to the heating medium supply source is opened at the upper part of the lower chamber. (2) The sealed container for heat exchange is a double container consisting of an inner container and an outer container, and a vacuum insulation layer is formed between these containers, and a partition wall is provided in the inner container. 2. The vehicle hot-washing device described in Section 1. (3) The washer fluid delivery pipe penetrates the bottom wall and partition wall of the sealed heat exchange container from below and opens into the lower part of the upper chamber, and the washer fluid supply pipe extends from the bottom of the sealed container from below. The heat medium delivery pipe penetrates the walls and partition walls and opens at the top of the upper chamber, and the heat medium delivery pipe penetrates the bottom wall from below the sealed container and opens at the bottom of the lower chamber, and the heat medium return pipe opens at the bottom of the lower chamber. 2. A vehicle hot washer device as set forth in claim 1, wherein said sealed container penetrates through its bottom wall from below and opens into the upper part of the lower chamber. (4) At the portion where the washer fluid delivery pipe and the heat medium delivery pipe penetrate the sealed container for heat exchange, the washer fluid delivery pipe is inserted into the heat medium delivery pipe to form a double pipe, and the washer fluid is supplied. 4. The hot water washer device for a vehicle according to claim 3, wherein the washer liquid supply pipe is inserted into the heat medium reflux pipe to form a double pipe at a portion where the pipe and the heat medium reflux pipe penetrate the sealed container. (5) The vehicle hot washer device according to claim 3, wherein the heat-insulating layer of the sealed container for heat exchange is thicker at the bottom wall of the sealed container than at other parts. (6) The hot washer device for a vehicle according to claim 1, wherein the washer liquid delivery pipe that opens into the upper chamber has a distal end bent downward so that the opening faces the upper surface of the partition wall. (7) A patent in which a cap is provided with a slight gap above the tip of the washer fluid delivery pipe that opens into the upper chamber, and the washer fluid flowing out from the opening is diverted toward the partition wall. A hot washer device for a vehicle according to claim 3. (8) The vehicle according to claim 3, wherein the partition wall is formed into a curved surface that curves upward in a convex shape, and the tip opening of the heat medium recirculation pipe is opposed to the lower surface of the top of the partition wall. Hot water supply device. (9) A hot water washer device for a vehicle according to claim 1, wherein engine cooling water is used as the heat medium. (10) A hot water washer device for a vehicle according to claim 1, wherein engine oil is used as the heat medium.