| 摘要 |
<p>A heating device for glass washing fluids of motor vehicles substantially consists of one or two plate-like bodies, each having an internal spiral channel. The channel(s) have two communications with the outside, namely an inlet and an outlet, are sealingly closed by a plate of copper or similar good heat conductor, and to the copper plate is superposed or between the plates is arranged as heating element a PTC (Positive Temperature Coefficient) thermistor, connected through a suitable switch to the poles of the vehicle battery, with the eventual interposition of a thermostat, the channel inlet being connected with the duct coming from the washing fluid reservoir provided with a pump, and the channel outlet being connected with the spraying nozzles, so that water enters cold the device inlet and goes out warm from the device outlet. It is also possible to make a chamber in one of the bodies at the point of the inlet, to connect directly the device with a washing fluid suction pump.</p> |
