CN2620225Y - Evaporator - Google Patents

Abstract

The utility model relates to an evaporator, in particular to a new evaporator used on an instant freezer. The evaporator is composed of a plurality of layers of calandrias which are independent circulation loops respectively, and is characterized in that each layer of calandrias is composed of a plurality of flat pipes, two ends of each flat pipe are fixedly communicated with two square pipes, and two ends of each square pipe are sealed. The interior of the cavity of one of the square pipes is spaced into three sections which are not mutually communicated. The two sections at the two ends are connected with a liquid supply branch pipe respectively, the central section is connected with a back-steam branch pipe, the liquid supply branch pipes are all connected with a main liquid supply pipe, and all the back-steam branch pipes are connected with a main back-steam pipe; the main liquid supply pipe is connected with the main back-steam pipe and a refrigeration system. The evaporator has few circulation loop elbows, and is not easy to accumulate oil. In addition, the evaporator is made from smooth flat pipes, the pipes do not frost, the evaporator can work continuously more than 20 hours without defrosting, and the work efficiency is greatly increased.

Description

A kind of evaporator

One, technical field

The utility model relates to a kind of evaporimeter, especially a kind of evaporator that is used on the instant freezer.

Two, background technology

Common evaporimeter adopts snakelike pipe cover fin form mostly, utilizes feed flow down, and ammoniacal liquor is discharged after the coiled pipe evaporation, and this evaporimeter ammoniacal liquor loop is long, and resistance is big, easily produces the back-steam superheating phenomenon, has increased the burden of refrigeration compressor; In addition, combining between pipe and the fin is not to combine closely, minim gap therebetween greatly reduces heat transfer coefficient, influenced heat-transfer effect, reduced the refrigeration of whole evaporimeter, there is the coiled pipe elbow many again, lubricating oil is difficult for discharge has also influenced heat-transfer effect, reduced the refrigeration of whole evaporimeter, the gap is very little between each fin of finned evaporator in addition, very easily frosting in process of refrigerastion, the sparse rapid reduction of the heat transfer of fin after the frosting, evaporimeter can't operate as normal, so finned evaporator work must defrosting after 8-10 hour, has reduced operating efficiency.

Three, utility model content

The purpose of this utility model is intended to overcome the deficiency of above-mentioned prior art, and a kind of evaporator that back-steam is overheated, be difficult for long-pending oil, frost-free, good refrigeration effect that do not produce is provided.

For achieving the above object, the utility model is achieved in that a kind of evaporator, mainly form by the several layers comb in the independent loops loop of respectively doing for oneself, its special character is, every layer of comb all is to be made of several flat tubes that two ends fixedly are communicated in respectively on two square tubes of closed at both ends, two holes that the relative side milling of square tube has mutual correspondence and matches with flat tube, every flat tube all inserts also to weld in corresponding two holes to be fixed; Wherein all be partitioned into not connected three sections in the tube chamber of a square tube; Two sections each welding that are positioned at the square tube two ends are communicated with a feed flow arm, and one section middle welding is communicated with a back-steam arm, and every layer feed flow arm all is connected with total feed pipe, and every layer back-steam arm all is connected with total return tube; Total feed pipe and total return tube join with refrigeration system respectively.

The utility model compared with the prior art, adopted the smooth flat tube of aluminium alloy to be welded, non-finned, closed circuit of every layer of independent composition of pipe, closed circuit shortens several times than coiled pipe, ammoniacal liquor also fully evaporation is just taken away, so the aluminum pipe inner surface often cooled dose lubricated, unlikely generation back-steam is overheated, improved the operation of refrigeration compressor, because evaporation fully of ammoniacal liquor in the pipe, the ammonia in the pipe is in vapour-liquid two-phase state all the time in addition, and since the speed of gas than big many of the speed of liquid, make gas in the pipe intermediate flow, and liquid is attached on the inside pipe wall and flows, and carries out heat exchange with pipe is outer all the time, thereby makes the heat transfer coefficient of evaporimeter also not have obviously reduction about subzero 45 degree, all the time be in the efficient operation state, moreover evaporator closed circuit elbow is few, is difficult for long-pending oil, add and adopt smooth flat tube to make, basic frost-free on the pipe, but continuous operation has improved operating efficiency more than 20 hours and do not need defrosting greatly.

Four, description of drawings

Fig. 1 is a vertical view of the present utility model.

Fig. 2 is a front view of the present utility model.

Fig. 3 is a left view of the present utility model.

Fig. 4 is the structural representation of square tube hole milling one side.

Five, the specific embodiment

With reference to Fig. 1-Fig. 4 as seen, evaporator described in the utility model, mainly form by the several layers comb in the independent loops loop of respectively doing for oneself, every layer of comb all is fixedly to be communicated in the square tube 1 of closed at both ends respectively and the several flat tubes on the square tube 2 constitute by two ends, the 2 relative side millings of square tube 1 and square tube have mutual corresponding and hole 3 that match with flat tube, every flat tube 4 all insert in corresponding two holes and welding fixing; All be partitioned into not connected three section 5,6,7 in the tube chamber of the square tube 1 of every layer of comb one end; Section 5, section 7 each welding of being positioned at square tube 1 two ends are communicated with a feed flow arm 8,9, and middle section 6 welding are communicated with a back-steam arm 10, and every layer feed flow arm 8,9 all is connected with total feed pipe 11, and every layer back-steam arm 10 all is connected with total return tube 12; Total feed pipe 11 and total return tube 12 join with refrigeration system respectively.

Claims (1)

1. A kind of evaporator, mainly form by the several layers comb in the independent loops loop of respectively doing for oneself, it is characterized in that: every layer of comb all is fixedly to be communicated in the square tube (1) of closed at both ends respectively and the several flat tubes on the square tube (2) constitute by two ends, square tube (a 1) side milling relative with square tube (2) has mutual corresponding and hole (3) that match with flat tube, every flat tube (4) all insert in corresponding two holes and welding fixing; All be partitioned into not connected three sections (5), (6), (7) in the tube chamber of the square tube (1) of every layer of comb one end; Section (5), each welding of section (7) of being positioned at square tube (1) two ends are communicated with a feed flow arm (8), (9), middle section (6) welding is communicated with a back-steam arm (10), every layer feed flow arm (8), (9) all are connected with total feed pipe (11), and every layer back-steam arm (10) all is connected with total return tube (12); Total feed pipe (11) and total return tube (12) join with refrigeration system respectively.

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