Temperature regulation system for electric vehicles
First Claim
1. A temperature regulation system, for use in an electric vehicle, operable in both cold and warm environments, the vehicle having at least one electric motor and at least one control component, comprisingfirst duct means for directing air from the motor to the control component,second duct means for returning air from the control component to the motor,means for forcing air through the first and second duct means,temperature sensing means disposed within the control component, andvalve means, operatively connected to and actuated in response to signals from, the temperature sensing means, the valve means comprising means for exposing the control component to outside air.
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Accused Products
Abstract
A temperature regulation system for use in an electric vehicle automatically provides for open-loop and closed-loop operation. In the closed-loop mode, air is forced through the electric motors of the vehicle, and is then delivered to selected components of the vehicle to keep them warm and dry. In the open-loop mode, outside air is allowed to enter the system to prevent overheating of critical components. The system is intended for use in an electric vehicle, such as a fork lift truck, which must alternate between operation in extremely cold environments and operation at normal temperatures.
22 Citations
17 Claims
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1. A temperature regulation system, for use in an electric vehicle, operable in both cold and warm environments, the vehicle having at least one electric motor and at least one control component, comprising
first duct means for directing air from the motor to the control component, second duct means for returning air from the control component to the motor, means for forcing air through the first and second duct means, temperature sensing means disposed within the control component, and valve means, operatively connected to and actuated in response to signals from, the temperature sensing means, the valve means comprising means for exposing the control component to outside air.
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7. In an electric vehicle suitable for operation inside food-storage freezers, the vehicle having an electric traction motor, a hydraulic-pump motor, an electrical box containing a substantial proportion of the electrical components of the vehicle, an accelerator and a control console, the improvement which comprises:
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a closed system of ducts arranged so as to direct air from the traction motor and pump motor to the electrical box, to the console, and to the accelerator, and back to the traction and pump motors, means for forcing air through the system, and means for opening the system to outside air when the temperature in the electrical box reaches a predetermined value. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A temperature regulation system for use in an electric fork lift vehicle, the vehicle being designed for operation within extremely cold environments, the vehicle being designed such that most of its electrical components are disposed within an electrical box, and also including a control console and an accelerator box, and having at least one electric motor, the system comprising:
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means for directing air from the motor into the electrical box, means for directing air from the electrical box to both the control console and the accelerator, means for directing air from the control console and accelerator back to the electric motor, and temperature-responsive means for opening the system to outside air when the temperature within the electrical box exceeds a predetermined value.
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15. In an electric fork lift vehicle having a traction motor, a hydraulic pump motor, an electrical box, a control console, an accelerator, and a blower chamber, a temperature regulation system comprising:
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a set of ducts, leading from the traction and pump motors to the electrical box, and leading from the electrical box to both the control console and the accelerator, and leading from the control console and the accelerator to the blower chamber, and from the blower chamber back to the traction and pump motors, and temperature-responsive means for simultaneously opening the ducts to outside air and closing the ducts leading from the electrical box to the control console and the accelerator. - View Dependent Claims (16, 17)
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Specification