JP5601942B2 - Cleaning liquid heating device - Google Patents

Description

  The present invention relates to a cleaning liquid heating apparatus for heating cleaning liquid and cleaning water for cleaning vehicle window glass and the like (herein, these are collectively referred to as cleaning liquid).

  There has been proposed a window washer device provided with a cleaning liquid heating device that performs deicing by heating a cleaning liquid when cleaning a window glass that has been frosted or iced during cold weather. In Patent Document 1, electric heating is performed so as to cover the periphery of a pipe body connected to a part of a cleaning liquid supply pipe between a cleaning tank storing cleaning liquid and an injection nozzle for injecting the cleaning liquid onto a window glass of an automobile. There has been proposed a technique in which a heating unit including a coil is provided, and the cleaning liquid flowing through the tube is heated by the heating unit and sprayed from the spray nozzle. Further, Patent Document 2 includes a liquid heating chamber in which a heating element is disposed in a liquid chamber in which the cleaning liquid is temporarily retained. The cleaning liquid is introduced into the liquid heating chamber and heated by the heating element. However, a technique has been proposed in which the heated cleaning liquid is supplied toward the jet nozzle.

JP-A-9-240436 Special table 2007-52202

  Since the technique of Patent Document 1 is configured to heat the cleaning liquid flowing through the pipe body from the peripheral surface of the pipe body, it is difficult to heat the liquid to a required temperature while moving a large amount of the cleaning liquid. In addition, the heating temperature of the cleaning liquid tends to be non-uniform between the central portion and the peripheral portion in the tube. In order to realize this, it is necessary to take measures such as designing the heating means to be long or increasing the heat capacity of the heating means, which increases the size of the heating device and increases power consumption. In the technique of Patent Document 2, since the cleaning liquid retained in the cleaning heating chamber is heated by the heating element, if the cleaning heating chamber is designed to have a capacity capable of retaining the cleaning liquid required for one cleaning, a considerable amount of cleaning liquid is obtained. Can be heated to a required temperature and sprayed. However, on the other hand, the apparatus becomes large in order to ensure the capacity of the cleaning and heating chamber.

In addition, since the cleaning liquid is introduced into the cleaning heating chamber through the introduction port and the cleaning liquid is led out toward the injection nozzle through the outlet port provided near the introduction port, the cleaning heating chamber is not sufficiently heated. The cleaning liquid may be led out through the outlet. Furthermore, both Patent Documents 1 and 2 use an electric resistance heating means such as a nichrome wire as a heating means or a heating element, and this electric resistance heating means has a high rate of temperature rise to heat the cleaning liquid in a short time. Although it is advantageous, when the energization is continued, the cleaning liquid is excessively heated to an unnecessarily high temperature, which may cause the user to be burned and cause a wasteful consumption of electric power.

  An object of the present invention is to provide a cleaning liquid heating apparatus that heats a cleaning liquid quickly and uniformly and that is small in size and has low power consumption.

The present invention relates to a cleaning liquid heating apparatus for heating a cleaning liquid provided in a cleaning apparatus that performs cleaning by spraying a cleaning liquid in a cleaning liquid tank from an injection nozzle, and a heating chamber through which the cleaning liquid flows, and a heating chamber A cleaning liquid introduction port for introducing the cleaning liquid into the heating chamber, a cleaning liquid outlet port for deriving the cleaning liquid in the heating chamber, and a heating means for heating the cleaning liquid inserted in the heating chamber. The front chamber communicated with the port and the rear chamber communicated with the cleaning liquid outlet port are divided into chambers, and the heating means is composed of a semiconductor heater, which is extended in the flow direction of the cleaning liquid and fitted to both ends in the extending direction. decorated in a state fitted to respective front chamber and rear chamber by the gasket, the cleaning liquid flows through the rear chamber from the front chamber, Characterized in that it is configured to be heated by respective heating means in the flow through the chamber.

  In the present invention, the cleaning liquid outlet port and the cleaning liquid introduction port are preferably opened on different surfaces of the heating chamber. The cleaning liquid outlet port is preferably opened on the upper surface of the heating chamber.

In the present invention, it has preferably be made substantially uniform cross-sectional area in the direction orthogonal to the flow direction of the cleaning liquid along the length of the heating chamber in the heating chamber.

According to the present invention, the heating chamber is divided into the front chamber and the rear chamber, and the cleaning liquid is heated by the heating means incorporated in each chamber while flowing the cleaning liquid from the front chamber through the rear chamber. Even if the dimension, that is, the length of the cleaning liquid heating device is designed to be short, the cleaning liquid is heated while flowing through a long distance. Therefore, since the heating effect can be enhanced, the time for raising the temperature of the cleaning liquid to a predetermined temperature can be shortened, and a cleaning apparatus having a high cleaning speed can be configured. Further, the heating means is constituted by a semiconductor heater, and is extended in the flow direction of the cleaning liquid, and is installed in a state of being fitted to each of the front chamber and the rear chamber by gaskets fitted to both ends of the extension direction. The heating means in the chamber can be positioned by the gasket, and the liquid tightness in the chamber can be secured.

According to the present invention, by opening the cleaning liquid outlet port and the cleaning liquid introduction port on different surfaces of the heating chamber, the cleaning liquid flowing in the heating chamber can be rectified and the heating effect by the heating means can be enhanced. In addition, since the cleaning liquid outlet port is opened on the upper surface of the heating chamber, the cleaning liquid that has been sufficiently heated is led out from the heating chamber, and the cleaning liquid immediately after being introduced into the heating chamber is not led out. In addition to heating, when bubbles are generated in the heating chamber, the bubbles can be easily extracted from the cleaning liquid outlet port, the bubbles stay in the heating chamber and the flow capacity of the cleaning liquid in the heating chamber decreases, The heating effect of the cleaning liquid is not reduced.

According to the present invention, since the flow cross-sectional area of the cleaning liquid in the heating chamber is made substantially uniform along the length direction of the heating chamber, the fluid pressure of the cleaning liquid flowing from the cleaning liquid tank toward the spray nozzle is reduced. It is possible to suppress and spray the cleaning liquid over a wide range of the windshield.

The conceptual block diagram of the windshield washing | cleaning apparatus provided with the washing | cleaning liquid heating apparatus of this invention. FIG. 3 is an external perspective view of the cleaning liquid heating apparatus according to the first embodiment. The front view of FIG. IV-IV sectional view taken on the line of FIG. VV sectional view taken on the line of FIG. The process chart explaining cleaning operation. The characteristic figure of a semiconductor heater. The front view of the washing | cleaning heating apparatus of Embodiment 2. FIG. IX-IX sectional view taken on the line of FIG. XX sectional drawing of FIG.

(Embodiment 1)
Next, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a conceptual diagram in which the present invention is applied to a windshield cleaning apparatus for an automobile. A cleaning liquid tank T for storing cleaning liquid, a pump P for pumping the cleaning liquid in the cleaning liquid tank T, and the vicinity of the windshield FG. There is provided an injection nozzle N which is disposed at a position and is connected to the cleaning liquid tank T by a supply pipe SP. The cleaning liquid heating device 1 according to the present invention is interposed in the middle of the supply pipe SP so as to heat the cleaning liquid pumped through the supply pipe SP to a required temperature. The driver's seat of the automobile is provided with a cleaning switch Sw operated when cleaning and a heating switch Sh for heating the cleaning liquid. Here, the heating switch Sh is integrally provided in a part of the display D including an LED or the like for displaying the operation state of the cleaning liquid heating apparatus 1. The cleaning switch Sw is connected to the pump P. When the cleaning switch Sw is turned on, the pump P is driven to pump the cleaning liquid in the cleaning liquid tank T. The display D (including the heating switch Sh) is electrically connected to the cleaning liquid heating device 1 by an electric harness EH. The electrical harness EH is also electrically connected to an in-vehicle battery BAT as a power source.

In this windshield cleaning device, when the driver operates the cleaning switch Sw when cleaning the windshield FG, and the pump P is driven accordingly, the cleaning liquid in the cleaning liquid tank T is pumped to the injection nozzle N through the supply pipe SP. , And is injected from the injection nozzle N onto the surface of the windshield FG. At this time, when the heating switch Sh is turned on, the cleaning liquid flowing through the supply pipe SP is heated by the cleaning liquid heating apparatus 1 and is sprayed from the spray nozzle N while being heated to a predetermined temperature. It becomes possible to quickly melt frost and ice adhering to the surface of the glass FG.

  2 is an external view of the cleaning liquid heating apparatus 1, FIG. 3 is a front view, FIG. 4 is a sectional view taken along the line IV-IV in FIG. 3, and FIG. 5 is a sectional view taken along the line VV in FIG. In these drawings, the cleaning liquid heating apparatus 1 includes a casing 2 having a container shape close to a rectangle having an opening 2a on one end side. The opening 2a of the casing 2 is sealed by a cap 3 that can be attached to and detached from the casing 2 by an engagement piece 3a or the like, and a heating chamber 21 for heating the cleaning liquid is formed inside the casing 2. An upstream pipe connected to the cleaning liquid tank T of the supply pipe SP can be connected to a position near the other end of the lower surface of the casing 2 so that the cleaning liquid is introduced to introduce the cleaning liquid from the cleaning liquid tank T into the heating chamber 21. A port 4 is provided, and a downstream pipe connected to the injection nozzle N in the supply pipe SP can be connected to a position near the other end of the upper surface of the casing 2 so that the cleaning liquid in the heating chamber is directed toward the injection nozzle N. A cleaning liquid outlet port 5 is provided for leading out. Here, the cleaning liquid introduction port 4 is disposed near the back surface of the casing 2, and the cleaning liquid outlet port 5 is disposed near the front surface of the casing 2.

  In the heating chamber 21, a flat partition wall plate 22 is formed so as to protrude from the other end surface of the heating chamber 21 toward the opening 2 a at a substantially central position in the front-rear direction (front-back direction) of the heating chamber 21. The heating chamber 21 is partitioned into front and rear chambers 21f and 21r. Therefore, the front chamber 21f is opened to communicate with the cleaning liquid outlet port 5, and the rear chamber 21r is opened to communicate with the cleaning liquid introduction port 4. Further, since the tip of the partition plate 22 is shorter than the length dimension of the heating chamber 21 (the dimension in the left-right direction in FIG. 4), the front and rear chambers 21f, The cleaning liquid introduced into the heating chamber 21 from the cleaning liquid introduction port 4 is first introduced into the rear chamber 21r, and then travels from the chamber 21r to the front end side region of the partition plate 22 to reach the front chamber. 21 f is led to the outside of the heating chamber 21 from the front chamber 21 f through the cleaning liquid outlet port 5.

  Heaters 6 are housed in the chambers 21f and 21r before and after the casing 2 through the openings 2a. These heaters 6 are formed in a flat plate shape having a size smaller than the front and rear chambers 21f and 21r by a predetermined size smaller than the height and length of the chambers 21f and 21r and the depth (front and rear direction). In the state of being housed in each chamber 21f, 21r, small gaps are formed on both sides of each heater 6 in the front-rear direction and in the width direction. Therefore, the cleaning liquid flows in the heating chamber 21 through the gap, and particularly when flowing from the rear chamber 21r to the front chamber 21f as described above, the cleaning liquid follows the surface of the heater 6 in each chamber. Will be passed through.

  Here, an area obtained by subtracting the cross-sectional area of each heater 6 in the same direction from the cross-sectional area of the flow of the cleaning liquid in the front chamber 21f and the rear chamber 21r, that is, the cross-sectional area in the direction perpendicular to the length direction of the chambers 21f and 21r. Is configured to have a uniform area. Therefore, the cleaning liquid that flows from the cleaning liquid introduction port 4 to the cleaning liquid outlet port 5 flows in a state where the flow cross-sectional area is substantially constant.

  Here, a semiconductor heater is used as each heater 6. Since an existing semiconductor heater can be used, a detailed description using the drawings is omitted here, but the semiconductor element is surrounded by aluminum to form a pair of electrodes 6a, and the surface thereof is an insulating sheet. It is coated with. By controlling the current flowing through the electrode 6a, the heater 6 can be controlled to a desired temperature, and in particular, the heater 6 can be easily controlled at a constant temperature. These heaters 6 are housed in a state of being fitted into the front chamber 21f and the rear chamber 21r by gaskets 61 and 62 fitted to both ends in the length direction. The gaskets 61 and 62 position the heaters 6 in the front and rear chambers 21f and 21r. In particular, the gasket 61 on the opening 2a side has liquid tightness with the cap 3 attached to the opening 2a. It is also provided to ensure that the cleaning liquid does not leak outside from the heating chamber 21. In addition, the electrode 6a of each heater 6 penetrates the said cap 3, and is derived | led-out outside, and the electrical harness EH shown in FIG. 1 is connected.

  A container-like cover 7 is detachably attached to the front surface of the casing 2 by an engagement piece 7a or the like, and a control circuit unit 8 having a circuit board 81 and a temperature sensor 82 in the cover 7. Is configured. The temperature sensor 82 is inserted into a small hole 2b opened in the front of the casing 2, and is configured to detect the temperature of the cleaning liquid in the front chamber 21f. The circuit board 81 is fixedly supported on the front surface of the casing 2, and is electrically connected to the temperature sensor 82, and various electronic components for constituting the control circuit unit 8 having a required function although not shown. Is installed. The cover 7 includes a connector 71 for electrically connecting the control circuit unit 8 to the electric harness EH.

In the windshield cleaning device 1 provided with this cleaning liquid heating device, the pump P is driven when the driver turns on the cleaning switch Sw in a state where the ignition switch of the automobile is turned on and the engine is started. The cleaning liquid flows through the supply pipe SP and is supplied to the cleaning liquid heating apparatus 1. The cleaning liquid flows through the heating chamber 21 from the cleaning liquid introduction port 4 of the cleaning liquid heating apparatus 1, and is further pumped from the cleaning liquid outlet port 5 to the injection nozzle N, and is injected from the injection nozzle N onto the surface of the windshield FG. At this time, if the heating switch Sh is OFF, the heater 6 of the cleaning liquid heating apparatus 1 does not generate heat, and the cleaning liquid flowing through the heating chamber 21 is not heated. Normally, when the cleaning switch Sw is turned on, the wiper W (FIG. 1) is driven simultaneously with the spraying of the cleaning liquid, so that the windshield FG is cleaned.

On the other hand, when frost or ice adheres to the windshield FG in a cold region, the frost and ice cannot be removed only by spraying the cleaning liquid. At this time, the driver turns on the heating switch Sh and then turns on the cleaning switch Sw. This will be described with reference to the process chart of FIG. When the ignition switch of the automobile is turned on and the engine is started (S1), when the driver turns on the heating switch Sh (S2), the control circuit 8 starts energizing the heater 6 to generate heat. The temperature of the cleaning liquid immediately before being derived from the cleaning liquid deriving port 5 in the front chamber 21f is detected by the temperature sensor 82. When the temperature is lower than the predetermined temperature, here, when the temperature is lower than T1, the display D composed of the LED provided in the driver's seat is blinked to display that the cleaning liquid heating device 1 is in the standby state (heating state) (S2). This temperature is a temperature at which the cleaning liquid is not sufficient, and even if the cleaning liquid is sprayed, the attached frost and ice cannot be melted effectively.

When the temperature sensor 82 detects that the cleaning liquid temperature is equal to or higher than T1, the control circuit unit 8 turns on the display D continuously (S3). Thus, the driver can recognize that the cleaning liquid is heated to a suitable temperature. When the temperature sensor 82 detects that the cleaning liquid temperature is equal to or higher than T2 (T1 <T2), the control circuit unit 8 stops energizing the heater 6 (S4). This is to prevent overheating of the cleaning liquid. Thereafter, when the driver turns on the cleaning switch Sw, the pump P is driven to pump the cleaning liquid in the cleaning liquid tank T to the supply pipe SP. As a result, the cleaning liquid in the supply pipe SP is sequentially pumped, and the cleaning liquid heated by the cleaning liquid heating device 1 is led out from the cleaning liquid lead-out port 5 and pumped to the spray nozzle N, and sprayed onto the windshield FG (S5). As the cleaning liquid in the cleaning liquid tank T is sequentially pumped to the cleaning liquid heating apparatus 1 in this way, the cleaning liquid before heating is supplied to the cleaning liquid heating apparatus 1, so that the temperature of the cleaning liquid in the cleaning liquid heating apparatus 1 decreases.

Thereafter, the control circuit unit 8 detects the temperature of the cleaning liquid, and when the temperature sensor 82 detects that the cleaning liquid temperature is less than T3 (T1> T3), the control circuit unit 8 starts energizing the heater 6. The heating of the cleaning liquid is started again, and the display D is blinked to display that the cleaning liquid superheater 1 is in a standby state (S6). Then, this heating is performed for a predetermined interval time (S7), and when the cleaning liquid temperature becomes T1 or higher again, the control circuit unit 8 stops energization of the heater 6 and continuously lights the display D (S8). Then, the cleaning liquid heated when the cleaning switch Sw is turned on again is sprayed onto the windshield FG, and cleaning is performed again (S9, S10). The above steps (S2) to (S10) are set as one cycle, and the one cycle time is set to X seconds. When X seconds have elapsed, it is assumed that one cycle is completed, and the control circuit unit 8 stops energizing the heater 6, turns off the display D, and ends the cleaning operation (S11). When performing further cycles of cleaning, it is necessary for the driver to operate the heating switch Sh and the cleaning switch Sw again.

Here, the cleaning liquid temperatures T1, T2, T3 and one cycle time X can be arbitrarily set, and it is particularly preferable to set them appropriately according to the environment in which the automobile is used. In addition, the number of cleaning liquid injections in one cycle and the time from the injection to the next injection (interval time) vary depending on the driver's usage status (number of seconds for one injection, etc.) and environment (outside temperature, cleaning liquid temperature in tank) . In addition, the time required for heating the cleaning liquid to the temperature T1 in the cleaning liquid heating apparatus 1 is measured in advance, and the time (interval time) from the previous injection is measured instead of detecting the temperature. It is also possible to have specifications that control blinking and continuous lighting on the display D for the next injection.

  As described above, the cleaning liquid heating apparatus 1 according to the embodiment can heat the cleaning liquid to a temperature at which frost and ice attached to the windshield FG can be melted. In particular, the heating chamber 21 is cleaned by the partition plate 22. The introduction port 4 is divided into a chamber 21r after the communication port is opened and a front chamber 21f where the cleaning solution outlet port 5 is opened. The cleaning solution introduced into the heating chamber 21 must flow through the rear chamber 21r without fail. Since the front chamber 21f is passed through and is heated by the heater 6 in each of the rear chamber 21r and the front chamber 21f, even if the length of the cleaning liquid heating device 1 is designed to be short, the cleaning liquid is approximately twice as much as that. It is heated while flowing through the length, and the heating effect can be enhanced. Therefore, the time for raising the temperature of the cleaning liquid to a predetermined temperature can be shortened, and a cleaning apparatus with a high cleaning speed can be configured. Further, since the cleaning liquid introduction port 4 is opened on the lower surface of the heating chamber 21 and the cleaning liquid outlet port 5 is opened on the upper surface of the heating chamber 21, the cleaning liquid introduced into the heating chamber 21 is filled in the heating chamber 21. Then, the cleaning liquid is sequentially derived from the cleaning liquid outlet port 5 from the upper layer cleaning liquid. Therefore, the cleaning liquid sufficiently heated in the heating chamber 21 is led out, and the cleaning liquid immediately after being introduced into the heating chamber 21 from the cleaning liquid introduction port 4 is not led out, and the cleaning liquid can be reliably heated. Further, since the cleaning liquid outlet port 5 is opened on the upper surface of the heating chamber 21, when bubbles are generated in the heating chamber 21, the bubbles can be easily extracted from the cleaning liquid outlet port 5. The flow capacity of the cleaning liquid in the heating chamber 21 is reduced and the heating effect of the cleaning liquid is not lowered, and the power consumption of the heating device can be reduced.

  In addition, the heating chamber 21 of the cleaning liquid heating device 1 has an appropriate shape and size of the heater 6 inserted in the front chamber 21f and the rear chamber 21r, and the flow cross-sectional area of the cleaning liquid in the front and rear chambers 21f and 21r is uniform. Therefore, the fluid pressure of the cleaning liquid flowing through the heating chamber 21 can be made uniform so that the pump discharge pressure of the cleaning liquid tank T is lowered by the cleaning liquid heating device 1. Rather, the discharge pressure can be maintained up to the spray nozzle N, and the cleaning liquid can be sprayed uniformly over a wide range of the windshield FG.

  Here, since the heater 6 inserted in the heating chamber 21 of the cleaning liquid heating apparatus 1 is composed of a semiconductor heater, the temperature control of the cleaning liquid can be easily performed. FIG. 7 shows the characteristics of the semiconductor heater. When a current is passed through the semiconductor heater and the temperature of the semiconductor heater rises, the resistance of the semiconductor rises, so that the current drops and the temperature drops. Accordingly, since the semiconductor heater is stabilized at a temperature corresponding to the first flowing current due to such a trade-off between current and temperature, the heater 6 is not overheated in the heating chamber 21, and the cleaning liquid The temperature control is easy. Incidentally, an electric resistance heater using a nichrome wire has a high rate of increase, and the temperature rises indefinitely and is likely to be overheated, making temperature control difficult. In addition, the temperature of the heater is also high for ceramic heaters, and temperature control is difficult.

(Embodiment 2)
8 is a front view of the cleaning liquid heating apparatus 1A according to the second embodiment, FIG. 9 is a sectional view taken along line IX-IX in FIG. 8, and FIG. 10 is a sectional view taken along line XX in FIG. In these drawings, parts equivalent to those in the first embodiment are denoted by the same reference numerals. This cleaning liquid heating device 1A has a cleaning liquid introduction port 5 communicating with the other end surface of the casing 2, and two flat heaters 6 are inserted into the heating chamber 21 at a required interval. The fins 9 made of a plurality of heat conductive thin plates extending in the vertical direction are arranged in parallel so as to form tapered fine intervals. As a result, a central chamber 21c in a region surrounded by both the heaters 6 and the plurality of fins 9 and a peripheral chamber 21o in a region along the periphery of both the heaters 6 and the fins 9 are partitioned. That is, both the heaters 6 and the plurality of fins 9 function as partition walls, and the cleaning liquid introduction port 4 communicates with the central chamber 21c and the cleaning liquid outlet port 5 communicates with the surrounding chamber 21o. It is the same as in the first embodiment that the flow cross-sectional area of the cleaning liquid in the central chamber 21c and the peripheral chamber 21o is designed to be substantially uniform along the length direction of the casing 2.

  In this cleaning liquid heating apparatus 1A, the cleaning liquid pumped from the cleaning liquid tank T is introduced into the central chamber 21c of the heating chamber 21 through the cleaning liquid introduction port 4, and this central chamber 21c, that is, between the heaters 6 and the plurality of fins 9, is introduced. It flows in the direction of one end. Then, on the opening 2 a side of the casing 2, the air flows toward the periphery of both the heaters 6 and the plurality of fins 9, and this time, the air flows through the peripheral chamber 21 o toward the other end, and the peripheral chamber 21 o on the upper surface of the casing 2. Derived from the cleaning liquid outlet port 5 opened in Then, when flowing through the central chamber 21 c and the surrounding chamber 21 o, it is heated by both heaters 6 and is heated by the fins 9 in a state where heat is transferred from both heaters 6.

  Even in the cleaning liquid heating apparatus 1A of the second embodiment, even if the length dimension of the cleaning liquid heating apparatus 1A is designed to be short, the cleaning liquid is heated while flowing the cleaning liquid approximately twice as long. Since it can be increased, the time for raising the temperature of the cleaning liquid to a predetermined temperature can be shortened, and a cleaning apparatus having a high cleaning speed can be configured. Further, since the cleaning liquid outlet port 5 is opened on the upper surface of the heating chamber 21, the sufficiently heated cleaning liquid is derived from the heating chamber 21, and the cleaning liquid immediately after being introduced into the heating chamber 21 is derived. The cleaning liquid can be heated reliably. Further, since the cleaning liquid outlet port 5 is opened on the upper surface, when bubbles are generated in the heating chamber 21, the bubbles can be easily extracted from the cleaning liquid outlet port 5, and the bubbles stay in the heating chamber 21. Thus, the flow capacity of the cleaning liquid in the heating chamber 21 is reduced, and the heating effect of the cleaning liquid is not reduced. Further, since the flow cross-sectional area of the cleaning liquid in the heating chamber 21 is substantially uniform in the length direction, the fluid pressure of the cleaning liquid can be made uniform, and the injection nozzle N can be maintained without reducing the pump discharge pressure. The cleaning liquid can be sprayed over a wide range of the windshield FG.

  The shape of the cleaning liquid heating device according to the present invention, in particular, the shape of the casing 2 and the heating chamber 21 configured therein, and the shape of the partition wall defining the heating chamber 21 are not limited to the configurations of the first and second embodiments. Needless to say. Needless to say, the heating means is not limited to the semiconductor heater of the embodiment.

  The present invention can be applied to an apparatus for heating a cleaning liquid containing cleaning water to a temperature at which frost and ice adhering to a window glass of a vehicle are melted.

1, 1A Cleaning liquid heating device 2 Casing 3 Cap 4 Cleaning liquid introduction port 5 Cleaning liquid outlet port 6 Heater 7 Cover 8 Control circuit section 9 Fin (partition wall)
21 Heating chamber 21f Front chamber 21r Rear chamber 22 Bulkhead 82 Temperature sensor

Claims (4)

A cleaning liquid heating apparatus for heating the cleaning liquid provided in a cleaning apparatus that performs cleaning by spraying a cleaning liquid in a cleaning liquid tank from an injection nozzle, and a heating chamber through which the cleaning liquid flows, and in the heating chamber A cleaning liquid introduction port for introducing the cleaning liquid; a cleaning liquid outlet port for deriving the cleaning liquid in the heating chamber; and a heating unit that is inserted into the heating chamber and heats the cleaning liquid. The front chamber communicated with the cleaning liquid introduction port and the rear chamber communicated with the cleaning liquid outlet port are divided into chambers, and the heating means is composed of a semiconductor heater, and is arranged to extend in the flow direction of the cleaning liquid. the fitted gaskets at both ends are furnished in a state fitted to each of the front chamber and a rear chamber, the cleaning solution is the It flows through through the rear chamber from the chamber, cleaning liquid heating apparatus characterized by being configured such that the are heated by the respective heating means in the flow through each chamber.   The cleaning liquid heating apparatus according to claim 1, wherein the cleaning liquid outlet port and the cleaning liquid introduction port are opened on different surfaces of the heating chamber.   The cleaning liquid heating apparatus according to claim 2, wherein the cleaning liquid outlet port is opened on an upper surface of the heating chamber.   The cleaning liquid heating according to any one of claims 1 to 3, wherein a cross-sectional area in a direction orthogonal to a flow direction of the cleaning liquid in the heating chamber is substantially uniform along a length direction of the heating chamber. apparatus.

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