WASHER FLUID WARMING DEVICE
First Claim
1. A washer fluid warming device arranged between a washer tank and a washer nozzle in a washer apparatus on board a vehicle, the washer fluid warming device warming a washer fluid sent in from the washer tank and sending the washer fluid out to the washer nozzle, the device comprising:
- a heat-retaining hot fluid storage chamber including a wall having a heat-insulating structure in which a vacuum layer is provided between an inner wall and an outer wall and including an inner space into which the washer fluid flowing out of the washer tank flows as a result of a washer pump being driven;
a small heating chamber including a wall having a thermal conductivity higher than that of the wall of the heat-retaining hot fluid storage chamber, being housed in the inner space of the heat-retaining hot fluid storage chamber, and further including an inner space into which the washer fluid in the heat-retaining hot fluid storage chamber flows as a result of the washer pump being driven; and
an electric heater housed in the inner space of the small heating chamber, the electric heater warming the washer fluid in the small heating chamber,wherein the inner space of the heat-retaining hot fluid storage chamber is set to have a size capable of accommodating a volume of washer fluid that is larger than a volume of washer fluid that can be accommodated by the inner space of the small heating chamber; and
wherein the warmed washer fluid flowing out of the small heating chamber is supplied to the washer nozzle as a result of the washer pump being driven.
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Accused Products
Abstract
A warming device capable of quickly increasing a temperature of a washer fluid with a relatively-low current, warming a relatively-large volume of washer fluid, and further retaining a washer fluid in a warmed state for some time after a power supply is turned off is provided. A warming device includes a structure in which a small heating chamber is housed in an inner space of a heat-retaining hot fluid storage chamber and an electric heater is housed in an inner space of the small heating chamber. The heat-retaining hot fluid storage chamber has a heat-insulating structure. The small heating chamber has a moderate thermal conductivity. A washer fluid fed from a washer tank is supplied to the small heating chamber through the heat-retaining hot fluid storage chamber, warmed by the heater and ejected from a washer nozzle.
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Citations
11 Claims
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1. A washer fluid warming device arranged between a washer tank and a washer nozzle in a washer apparatus on board a vehicle, the washer fluid warming device warming a washer fluid sent in from the washer tank and sending the washer fluid out to the washer nozzle, the device comprising:
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a heat-retaining hot fluid storage chamber including a wall having a heat-insulating structure in which a vacuum layer is provided between an inner wall and an outer wall and including an inner space into which the washer fluid flowing out of the washer tank flows as a result of a washer pump being driven; a small heating chamber including a wall having a thermal conductivity higher than that of the wall of the heat-retaining hot fluid storage chamber, being housed in the inner space of the heat-retaining hot fluid storage chamber, and further including an inner space into which the washer fluid in the heat-retaining hot fluid storage chamber flows as a result of the washer pump being driven; and an electric heater housed in the inner space of the small heating chamber, the electric heater warming the washer fluid in the small heating chamber, wherein the inner space of the heat-retaining hot fluid storage chamber is set to have a size capable of accommodating a volume of washer fluid that is larger than a volume of washer fluid that can be accommodated by the inner space of the small heating chamber; and wherein the warmed washer fluid flowing out of the small heating chamber is supplied to the washer nozzle as a result of the washer pump being driven. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification