Temperature control system

Abstract

To provide a temperature adjustment system capable of always appropriately adjusting the temperature of a battery transferring and receiving power to and from an electric motor, thereby further improving the performance of the electric motor.SOLUTION: A multi-position valve of a temperature adjustment system selectively forms: a first state in which a first and second heat circuits are separated; a second state in which the first and second heat circuits are connected so that a heat medium exchanges heat with an electric motor and is cooled by a heat pump circuit without exchanging heat with a battery; and a third state in which the first, second, and a third heat circuits are connected so that the heat medium after exchanging heat with the electric motor merges with the heat medium after releasing heat in the third heat circuit, and the heat medium heated in the third heat circuit flows into the first heat circuit via a communication passage and the second heat circuit.SELECTED DRAWING: Figure 4

Claims

1. In a temperature control system applied to a vehicle including an electric motor and a battery that exchanges power with the electric motor, A first thermal circuit that exchanges heat between the electric motor and the heat transfer medium, A second thermal circuit that exchanges heat between the battery and the heat transfer medium, A third thermal circuit that heats the heat transfer medium and releases heat from the heated heat transfer medium, A heat pump circuit that transfers heat from the heat transfer medium that has exchanged heat with the battery in the second heat circuit to the heat transfer medium that has dissipated heat in the third heat circuit, A connecting passage that connects the second heat circuit and the third heat circuit so as to allow the heat transfer medium heated in the third heat circuit to exchange heat with the battery, A multi-position valve that selectively forms a first state in which the first and second heat circuits are separated so that the heat transfer medium circulates in each of the first and second heat circuits; a second state in which the first and second heat circuits are connected so that the heat transfer medium exchanges heat with at least the motor in the first heat circuit and is cooled by the heat pump circuit without exchanging heat with the battery in the second heat circuit; and a third state in which the first, second and third heat circuits are connected so that the heat transfer medium that has exchanged heat with at least the motor in the first heat circuit merges with the heat transfer medium that has dissipated heat in the third heat circuit, and the heat transfer medium heated in the third heat circuit flows into the first heat circuit via the communication passage and the second heat circuit. Equipped with, The multi-position valve selectively forms the first, second, and third states and a fourth state in which the first and second heat circuits are connected such that the heat transfer medium exchanges heat with at least the motor in the first heat circuit and with the battery in the second heat circuit, and is cooled by the heat pump circuit in the second heat circuit. The first thermal circuit includes a heat exchanger that exchanges heat between the heat transfer medium cooled by the heat pump circuit and the outside air when the multi-position valve forms the second state. Temperature control system.

2. In the temperature control system according to claim 1, The heat pump circuit includes a compressor for compressing a heat transfer medium, a condenser for exchanging heat between the heat transfer medium from the compressor and the heat transfer medium that has been heated in the third heat circuit, a first expansion valve for expanding the heat transfer medium from the condenser, a chiller for exchanging heat between the heat transfer medium from the first expansion valve and the heat transfer medium that has been heated in the second heat circuit and the battery, a second expansion valve for expanding the heat transfer medium from the condenser, and an evaporator for exchanging heat between the heat transfer medium from the second expansion valve and air supplied to the vehicle interior, and the third heat circuit is a temperature control system including a heater core for exchanging heat between the heated heat transfer medium and air supplied to the vehicle interior, a heat exchanger for exchanging heat between the heated heat transfer medium and outside air, and a three-way valve for selectively supplying the heated heat transfer medium to the heater core and the heat exchanger.

3. In the temperature control system according to claim 2, The control device for controlling the multi-position valve further comprises A temperature control system comprising: a control device which controls the multi-position valve to form the first state when air conditioning in the vehicle interior is required, and a control device which controls the multi-position valve to form one of the second, third, or fourth states according to the temperature of the battery when heating in the vehicle interior is required and when the battery is charged by power from an external power source.

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