摘要:
An automotive vehicle such as, for example, an electric car is provided with a liquid heating and circulating apparatus for heating the interior of the vehicle body. The liquid heating and circulating apparatus is provided with a main tank containing liquid, a heater mounted in the main tank for heating the liquid, and a pump for circulating the liquid heated by the heater. The liquid heating and circulating apparatus is also provided with a water supply unit connected to the main tank and accommodating a pressure relief valve assembly, and an auxiliary tank connected to the water supply unit. The pressure relief valve assembly is operated according to predetermined pressures within the main tank to place the main tank in communication with the auxiliary tank.
摘要:
In a device for heating and circulating a fluid for vehicles wherein a fluid heating and delivering unit for heating and delivering a fluid, and a car room heat exchanger are annularly connected together to circulate the fluid in order to heat a car room, a bypass passage is installed in a fluid passage between the fluid heating and delivering unit and the car room heat exchanger, such that the bypass passage extends in a close vicinity to batteries to heat said batteries. The heated fluid for heating the car room is utilized to heat the batteries for driving the vehicle, so that the decrease of the battery temperature can be suppressed and the battery performance improved.
摘要:
An automotive air conditioning apparatus 10 is provided which includes a forced water supply system 9 and a heat pump system 14. A controller 16 controls the temperature of a second heat exchanger 38 of the heat pump system 14 to a desired temperature based on a preset temperature. The controller 16 also controls the temperature of the water circulating through the heat exchanger 20 of the forced water supply system 9 to a temperature at which the quantity of heat exchange between the air heated by the second heat exchanger 38 to the desired temperature and the heat exchanger 20 of the forced water supply system is minimized. According to this air conditioning arrangement, the temperature of the vehicle interior can be promptly raised without any capability drop being caused and thus, the heating efficiency of the apparatus being well enhanced.
摘要:
A first heat exchanger implements heat exchange between refrigerant and atmosphere. A second heat exchanger implements heat exchange between the refrigerant and air directed to an interior of the vehicle. A third heat exchanger downstream of the second heat exchanger implements heat exchange between the refrigerant and the air directed to the interior of the vehicle. A four-way valve connected among a refrigerant flow restricting device, the first heat exchanger, the second heat exchanger, and the third heat exchanger for changing a flow path of the refrigerant. A bypass device allows the refrigerant to selectively flow through the second heat exchanger and bypass the second heat exchanger. During a first mode of operation, the refrigerant is circulated sequentially through a compressor, the third heat exchanger, the four-way valve, the first heat exchanger, the refrigerant flow restricting device, the four-way valve, the second heat exchanger, and the compressor. During a second mode of operation, the refrigerant is circulated sequentially through the compressor, the third heat exchanger, the four-way valve, the refrigerant flow restricting device, the first heat exchanger, the four-way valve, the second heat exchanger, and the compressor. During a third mode of operation, the refrigerant is circulated sequentially through the compressor, the third heat exchanger, the four-way valve, the refrigerant flow restricting device, the first heat exchanger, the four-way valve, and the compressor while being allowed by the bypass device to bypass the second heat exchanger.
摘要:
A heat pump cooling-heating-dehumidifying system for an electric vehicle includes a compressor for compressing refrigerant, a refrigerant throttling device for achieving pressure reduction of the refrigerant, an out-room air-heat exchanger for heat-exchanging between the refrigerant and outside air, a first in-room air-heat exchanger for heat-exchanging between the refrigerant and air to be introduced into a car room, a second in-room air-heat exchanger provided downstream of the first in-room air-heat exchanger for selectively heat-exchanging between the refrigerant and the air which was heat-exchanged at the first in-room air-heat exchanger, and a four-way switching valve for switching a flow passage of the refrigerant. In each of the cooling operation and the dehumidifying-heating operation of the system, the refrigerant is circulated through the flow passage in order of the compressor, the second in-room air-heat exchanger, the four-way switching valve, the out-room air-heat exchanger, the refrigerant throttling device, the first in-room air-heat exchanger, the four-way switching valve and then the compressor. On the other hand, during the heating operation of the system, the refrigerant is circulated through the flow passage in order of the compressor, the second in-room air-heat exchanger, the four-way switching valve, the first in-room air-heat exchanger, the refrigerant throttling device, the out-room air-heat exchanger, the four-way switching valve and then the compressor.
摘要:
An automotive air conditioning apparatus includes a forced water supply system 12 and a heat pump system 14. The temperature of the vehicle interior is controlled by the heat pump system under ordinary atmospheric temperature conditions. However, at very low temperatures, for example, at the temperature of -5.degree. C. or lower, the temperature of the vehicle interior is controlled by the forced water supply system. According to this air conditioning arrangement, it is possible to achieve energy-efficient air conditioning even under very low temperature conditions and to prevent any compressor damage due to the liquefaction of the refrigerant.
摘要:
A motor-driven compressor is provided with a power supply terminal secured to a metallic housing and electrically connected to a power source. The power supply terminal includes a base secured to the metallic housing, a conductive element secured to the base, and an insulator for insulating the conductive element from the base. A portion of the conductive element and a portion of the insulator that are located inside the metallic housing are covered with an insulating resinous cover.
摘要:
A motor-driven compressor is driven by a driving device via a single-circuit external wiring system. The motor-driven compressor includes a closed vessel, a compression mechanism accommodated in the closed vessel, and an electric motor accommodated in the closed vessel for driving the compression mechanism. The electric motor includes three-phase stator windings each having two parallel circuits.
摘要:
An air conditioner increases a flow rate of a refrigerant to be sucked to a compressor so that a superheat of the refrigerant is reduced when a coil temperature of a driving motor for a compressor is more than a predetermined temperature.
摘要:
An air conditioning apparatus for an electric vehicle includes an electrically-driven compressor. A desired temperature is set which relates to one of a temperature of air discharged into a vehicle interior and a temperature within the vehicle interior. Detection is given of a temperature related to a heat exchanger. An inverter connected to the compressor is operative for driving the compressor at a variable speed corresponding to a desired rotational speed. A target temperature related to the heat exchanger is calculated in response to the desired temperature. Calculation is given of a difference between the detected temperature and the target temperature. Also, calculation is given of a variation in the detected temperature for every given period. A corrective rotational speed is calculated from the temperature difference and the temperature variation for every given period. Calculation is given of a sum of a current desired rotational speed of the compressor and the corrective rotational speed for every given period. The calculated sum is set as a new desired rotational speed of the compressor for every given period. The inverter is informed of the new desired rotational speed of the compressor.