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Heat exchanger

A technology of heat exchanger and heat, applied in air heaters, fluid heaters, electric heating devices, etc., can solve problems such as injury

Active Publication Date: 2011-01-19
MAHLE INT GMBH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the high voltage in the car air conditioner has safety problems, because if people touch the part with high voltage, they may be injured by the high voltage

Method used

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Embodiment Construction

[0051] figure 1 Car air conditioner 24 is shown. A blower 25 , a filter 30 , a refrigerant evaporator 31 , and a heat exchanger 1 as an electric heating device are arranged in a motor vehicle air conditioner housing 26 with a bottom wall 27 and an outlet section 29 . The air conditioner casing 26 forms a channel 35 for air to flow through. The wall 28 of the air-conditioning housing 26 delimiting the channel 35 has a surface 36 on its inner side. The air for the interior of the vehicle passes through the filter 30 , the refrigerant evaporator 31 and the heat exchanger 1 under the action of the blower 25 .

[0052] The vehicle air conditioner 24 therefore does not heat the air flowing through the air conditioner 24 via a heat exchanger through which coolant flows. The air flowing through the vehicle air conditioning unit 24 is heated only electrically by the heat exchanger 1 . The vehicle air conditioner 24 is preferably used in vehicles with an electric drive only or a hyb...

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Abstract

A heat exchanger includes at least an electronic resistance heating element (2), particularly positive temperature coefficient-element (PTC) (3), at least two linked conductors (4) having at least a resistance heating element (2) for conduction, particularly to circuit boards (6, 7) transmitting current to pass over at least one resistance heating element (2) to heat the resistance heating element (2); at least a heat transfer element (11) for transferring heat on at least one resistance heating element (2) to a heated fluid; at least electric isolator (22) isolating at least one heat transfer element (11) from at least two conductors (4). Therefore, it is no danger to environment particularly people under the current of a voltage above 50V. Two conductors (4) and / or at least a resistance heating element (2) are arranged in a hollow space (19) that is defined by a hollow space wall (17). An electronic insulator (22) is a sealing compound (23) which partially fills the hollow space (19). The conductors and / or at least a resistance heating element are isolated electrically by the hollow space wall (17) in a partial manner.

Description

technical field [0001] The invention relates to a heat exchanger, a vehicle air conditioning system, and a method for producing the heat exchanger or the vehicle air conditioning system. Background technique [0002] Car air conditioning equipment is used to heat or cool the air introduced into the interior space of the car. In a car air conditioner, a heat exchanger is installed as an electric heating device to heat the air that is introduced into the interior space. The electric heating device includes a set of PTC elements. Groups of PTC elements (PTC: Positive Temperature Coefficient) are materials that conduct electric current, they have a certain resistance, their resistance increases with temperature, they conduct current better at lower temperatures than at higher temperatures. The PTC element is generally composed of ceramics and is a kind of thermistor. The PTC element therefore always has a very uniform surface temperature, regardless of fundamental conditions ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F24H3/00F24H3/02F24H9/18
CPCF24H3/0435F24H3/082F24H3/0405F24H3/0452H05B3/50F24H9/1872H05B2203/023B60H1/2225F24H3/0429H05B2203/02
Inventor 米夏埃尔·科尔彼得·恩勒特托马斯·施特劳斯卡尔·洛赫马尔凡·吉恩托马斯·希默马克·鲍尔蒂埃里·克劳斯
Owner MAHLE INT GMBH
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