JP2584060B2 - Stacked heat exchanger - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a stacked heat exchanger used in an air conditioning system.

2. Description of the Related Art A conventional stacked heat exchanger as disclosed in Japanese Patent Application Laid-Open No. 60-253794 will be described below with reference to the drawings.

FIG. 3 shows a cross section of a conventional laminated heat exchanger.
FIG. 4 is an external view. 1 is an end plate, 2 is an entrance, 3 is a seal plate, 4 is a plate forming a primary-side refrigerant passage, and 5 is a plate forming a secondary-side refrigerant passage, and a plurality of plates are alternately stacked.

SUMMARY OF THE INVENTION However, in the above configuration, when the refrigerant is flowed and operated, the refrigerant flows until it hits the end plate on the opposite side, and then flows toward the plate that has formed the refrigerant passage. A large amount of refrigerant flows in the passage, and the refrigerant hardly flows in the refrigerant passage near the inlet portion, making it impossible to effectively use the heat transfer area and deteriorating heat exchange performance.

Means for Solving the Problems In order to solve the above-mentioned problems, the laminated heat exchanger of the present invention is configured such that a primary plate and a secondary plate, which form different refrigerant passages with a seal plate interposed therebetween, have a predetermined shape. Each time the stack is alternately stacked a plurality of times, the seal plate and the primary side plate, while laminating a plate formed with a smaller inflow hole than the secondary side plate, the plate formed with a smaller inflow hole, from the refrigerant inlet side direction The more the layers are separated, the smaller the inflow hole.

Action The present invention, when flowing the refrigerant by the above configuration,
A part of the inflowing refrigerant hits the plate whose inflow hole area has been sequentially reduced, is stirred, and flows into the refrigerant passage of each plate. Even when a liquid-mixed refrigerant flows in, the liquid refrigerant and gas refrigerant are uniformly mixed, and even when a refrigerant with an uneven temperature distribution flows in, the refrigerant is uniformly distributed in each refrigerant passage with a uniform temperature distribution. Flows, and the original heat transfer area can be effectively used, and the heat exchange performance is improved.

Embodiment Hereinafter, a laminated heat exchanger according to an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a cross section of a laminated heat exchanger according to an embodiment of the present invention, wherein 11 is an end plate, 12 is a refrigerant inlet / outlet portion, 13 is a seal plate, and 14 and 15 form different refrigerant passages 16 respectively. A plurality of primary and secondary plates are alternately stacked with the seal plate 13 interposed therebetween. And the primary side plate 1 with the seal plate 13 interposed
4, every time the secondary side plate 15 is alternately laminated a predetermined number of times, the seal plate 13 and the primary side plate 14, the plate 23 in which the cross section of the inflow holes 22, 22a, 22b is formed smaller than the secondary side plate 15. Are laminated. In addition, the plate 23 is formed such that the more the plate 23 is stacked away from the coolant inlet side,
The cross sections of 2a and 22b are formed small.

With the above configuration, at the time of refrigerant inflow, the inflow holes 22, 22a, 22b
The refrigerant is agitated in the part, so that the liquid refrigerant and the gas refrigerant are uniformly mixed even when the gas-liquid mixed refrigerant flows in, and the temperature distribution is uniform even when the refrigerant with uneven temperature distribution flows in In this state, the refrigerant flows uniformly through each of the refrigerant passages 16, the original heat transfer area can be used effectively, and the heat exchange performance is improved. In addition, the seal plate 13, the primary plate 14, and the secondary plate 15 can be diverted from the respective plates of the conventional laminated heat exchanger, and are used for sealing in which the inflow holes 22, 22a, 22b are formed smaller than the conventional plates. Since only a few kinds of plates 23 are added by changing the size of the inflow holes 22, 22a and 22b, an increase in plate manufacturing cost can be suppressed.

Effect of the Invention As described above, the present invention, with a seal plate interposed therebetween, each time a primary plate and a secondary plate each forming a different refrigerant passage are alternately laminated a predetermined number of times, the seal plate and The primary plate and the plate formed with the inflow hole smaller than the secondary plate are stacked, and the plate formed with the inflow hole smaller is:
By reducing the inflow hole as it is stacked away from the refrigerant inlet side, the refrigerant is agitated at the portion where the inflow hole suddenly becomes smaller, so that even when the gas-liquid mixed refrigerant flows in, the liquid refrigerant In the state where the gas refrigerant is uniformly mixed, and even when the refrigerant having an uneven temperature distribution flows in, the refrigerant flows uniformly in each refrigerant passage in a state where the temperature distribution is uniform, and the conventional heat transfer area Can be used effectively,
Heat exchange performance is improved. In addition, the seal plate, the primary plate, and the secondary plate can be diverted from each plate of the conventional stacked heat exchanger, and the size of the inflow hole is reduced by forming a sealing plate having a smaller inflow hole than the original plate. Since only a few types are changed and added, the increase in plate manufacturing cost can be suppressed.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a stacked heat exchanger according to an embodiment of the present invention, FIG. 2 is a plan view of a plate provided with an inlet hole of the present invention, and FIG. 3 is a cross-sectional view of a conventional stacked heat exchanger. FIG. 4 is an external perspective view of the stacked heat exchanger. 14… Primary plate, 15… Secondary plate, 16 ……
Refrigerant passages, 22, 22a, 22b ... inflow holes, 23 ... plates.

Claims (1)

(57) [Claims] 1. Each time a primary plate and a secondary plate, each of which forms a different refrigerant passage, are alternately laminated a predetermined number of times with a seal plate interposed therebetween, the seal plate, the primary plate, and the secondary plate A stack in which plates having inlet holes smaller than the side plates are stacked, and the plates in which the inlet holes are formed smaller, the smaller the inlet holes are, the smaller the inlet hole is. Type heat exchanger.