Laminated type heat exchanger

A laminated type heat exchanger comprising:

• a refrigerant inlet tank comprising a plurality of refrigerant inlet chambers, and in which a refrigerant passage passing through the refrigerant inlet chambers is formed;
• a refrigerant outlet tank comprising a plurality of refrigerant outlet chambers, and in which a refrigerant passage passing through the refrigerant outlet chambers is formed;
• a plurality of refrigerant pipes each having one end which is connected to the refrigerant inlet chamber and the other end which is connected to the refrigerant outlet chamber;
• a refrigerant gate portion for flowing the refrigerant into the refrigerant inlet tank and from the refrigerant outlet tank;
• a dispersion pipe which is inserted in the refrigerant passage formed in the refrigerant inlet tank;
• wherein the length of the dispersion pipe is ⅓˜¼ of the length of the refrigerant passage in the refrigerant inlet tank,
• the sectional area of the dispersion pipe is smaller than that of the refrigerant passage in the refrigerant inlet tank,
• a plurality of dispersion holes are formed at the opposite side of the dispersion pipe against the refrigerant pipe, and
• the size of the dispersion holes increases with the increase in the distance from the refrigerant gate portion.