| 摘要 |
FIELD: heating systems. ^ SUBSTANCE: invention refers to heating equipment and air warming equipment as well as maintaining the temperatures inside electric transport compartment at the specified level. Heater consists of a body inside which there is a heating block placed in a housing insulated from the body, an air supply block, converter of DC voltage of electric transport system into AC voltage of asynchronous motor power supply, and series-connected temperature sensors of protection system. Heating block is made in the form of a number of electrically connected heating elements attached through insulator plates to holders. Air supply block is made in the form of asynchronous motor connected with impeller and air flow shaper. Temperature sensors of protection system are installed inside the housing of heating block from the side of air supply block. In one of the body walls there provided are inputs of high and low supply voltage. ^ EFFECT: reducing acoustic pressure up to 40-45 dBA at high electric safety, and increasing service life up to several tens of thousands of hours. ^ 8 cl, 3 dwg |
