JPH0245735Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a Finch-Eube type heat exchanger used in freezers and refrigerators.

Configuration of conventional example and its problems The conventional Finch-Ube heat exchanger has 1st and 2nd
As shown in the figure, there are a large number of flat plate-shaped fins a and b arranged in parallel, refrigerant pipes c and d that pass through these fins, and a serpentine pipe in the center of the upper and lower ends of these fins. Defrost heaters e and f to be installed
In order to improve heat exchange efficiency, each row of refrigerant pipes c and d is analyzed as fins a and fins b, and the improvement of heat transfer coefficient due to the boundary layer leading edge effect is measured. Ta. However, since the pitch g between the refrigerant pipes c and d is large, there is a problem in that the fin efficiency is reduced. In addition, a defrosting heater e,
f must be installed on both the upper and lower sides of the heat exchanger and in each row of fins, resulting in high cost.

Purpose of the invention Therefore, the present invention aims to eliminate the above-mentioned drawbacks, improve the fin efficiency of the finch-tube heat exchanger, that is, improve the capacity, and reduce the cost by reducing the amount of defrosting heater used. With the goal.

Structure of the invention In order to achieve this objective, the present invention aims to improve fin efficiency by dividing plate fins into refrigerant pipes not only in rows but also in stages. The defrosting efficiency is improved and the disturbance caused by the defrosting heaters is improved by arranging the fins in a staggered manner and inserting the defrosting heaters between the three adjacent fins in the upper and lower stages so as to contact them. This is intended to improve the heat transfer coefficient by the flow promotion effect, that is, to improve the capacity, and to reduce the amount of defrosting heater used, thereby reducing costs.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings.

In FIGS. 3 and 4, reference numeral 1 denotes a finch tube type heat exchanger used as an evaporator for refrigerators, etc., and plate-shaped fins 2 arranged in the upper stage,
A fin 3 disposed at the lower stage, refrigerant pipes 4a and 4b inserted orthogonally through the center of these fins, and fins 2
The defrosting heater 5 is inserted between the fins 3 and the fins 3, that is, between the fins in the step direction.

The fins 2 and 3 provided for the refrigerant pipes 4a and 4b are also divided in the row direction of the refrigerant pipes 4a and 4b, and are ultimately divided in both the row direction and the stage direction. The refrigerant pipes 4a and 4b are arranged so that the positions of the fins in each stage are staggered. Specifically, the dividing position in the column direction is located at the center of the fins in the column direction. A defrosting heater 5 is inserted between the divided corner portions of the upper fins 2 and the center of the lower fins 3 so as to be in contact with each other.

In the above configuration, the defrosting heater 5 is arranged between two adjacent upper fins 2 and the lower fin 3 or between two adjacent lower fins 3 and the upper fin 2.
By being inserted between the fins and the refrigerant pipes 4a and 4b in parallel to the refrigerant pipes 4a and 4b, the contact area with the defrosting heater 5 per fin increases, improving defrosting efficiency. effect and defrosting heater 5
Due to the turbulent flow promotion effect, the heat transfer coefficient can be improved, that is, the capacity can be improved.

In addition, by providing the defrosting heater 5 between the upper fin 2 and the lower fin 3, the defrosting heater 5
This makes it possible to reduce the amount of fuel used and reduce costs.

As is clear from the above explanation, the present invention improves the fin efficiency by dividing the plate fins into rows and stages with respect to the refrigerant pipes, and also improves the efficiency of the fins by separating the upper and lower fins. By shifting the positions of the defrosting heaters so that they are staggered and inserting the defrosting heaters so as to contact the three rows of fins in the upper and lower stages, defrosting efficiency can be improved and heat transfer due to the turbulence promoting effect of the defrosting heaters. In other words, the efficiency can be improved, that is, the capacity can be improved, and the amount of defrosting heater used can be reduced, resulting in cost reduction.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a conventional Finch-Ube heat exchanger, Fig. 2 is a side view of the same heat exchanger, Fig. 3 is a perspective view of a heat exchanger according to an embodiment of the present invention, and Fig. 4 is a perspective view of the heat exchanger of the present invention. FIG. 3 is a sectional view taken along line A-A in FIG. 2, 3... Fin, 4a, 4b... Refrigerant pipe, 5
...Defrost heater.

Claims (1)

[Scope of utility model registration request] It consists of a large number of plate fins divided in the row direction and the stage direction, a refrigerant pipe passing through the plate fins, and a defrosting heater inserted between the fins in the stage direction, and the plate fins are separated at the divided positions in the row direction. The defrosting heater is arranged so as to be located approximately at the center of the plate fins in the column direction, and the defrosting heater is disposed in contact with a pair of fins in the column direction and the fins in the column direction.