CN2449172Y - Sleeve pipe type heat-exchanger for air conditioner set - Google Patents

Abstract

The utility model relates to a heat exchanger, particularly a sleeve pipe type heat exchanger for an air conditioner set of a pump. Straight inner tubes in ordinary sleeve pipe type heat exchangers are divided into 3 to 8 groups of spiral pipes which are respectively screwed into helix angles from 10 DGE to 45 DGE; a big bundle of helical tubes having helix angles from 10 to 45 DGE are composed of 3 to 8 groups of the screwed inner pipes of helical pipes. Medium flows in the inner tubes in a composite helical state which plays definite perturbation actions, makes laminar heat transfer into turbulent heat transfer, increases heat exchanging coefficient, adds flowing distances, and improves the heat efficiency. The deformation resistant properties and frost resistant properties of the spiral-shaped inner tubes are better than that of common straight inner tubes.

Description

The double pipe heat exchanger that the air-conditioning unit uses

The utility model relates to a kind of heat exchanger, is the double pipe heat exchanger that a kind of heat pump air conditioner unit uses specifically.

Air-hydro-thermal pump is the most a kind of idle call heat pump of common use, and the heat exchange work in this heat pump is normally finished by water-to-water heat exchanger.The kind of water-to-water heat exchanger mainly contains three kinds of shell-tube type, board-like and bushing types, and double pipe heat exchanger wherein is used for the less HEAT PUMP TYPE WATER CHILLERS of capacity.Double pipe heat exchanger commonly used is many straight interior pipes of suit in shell, and the two ends of interior pipe are fixed on the tube sheet.The interior pipe of this heat exchanger is straight light pipe, and its heat transfer property is lower, and non-deformability and anti-bursting by freezing ability are relatively poor.The interior pipe that uses in the other heat exchanger also has bellows, internal and external threads pipe or the internally finned tube of use, though this heat exchanger heat transfer efficiency is higher, price is higher relatively.

The purpose of this utility model provides the double pipe heat exchanger of the air-conditioning unit use that a kind of cost is low, heat transfer efficiency is high.

For achieving the above object, the utility model adopts the interior pipe of helix tube as heat exchanger, and interior pipe is many helix tubes of 3-8 group, Guan Jun pencil in the shape of a spiral in each group, also shape in the shape of a spiral of the axis of this 3--8 group helix tube simultaneously.

As to further improvement of the utility model, described in the helical angle of pipe be 10 degree-45 degree, the helical angle of the axis of the helix tube of pipe is 10 degree-45 degree in the described formation.

After adopting technique scheme, interior pipe helical form is installed in the shell, because interior pipe has the helical angles of 10 degree-45 degree, simultaneously in the also shape in the shape of a spiral of the axis of screw of pipe, medium also is the composite screw shape therein and flows, play certain perturbation action, make laminar heat transfer become turbulent heat transfer, improved the coefficient of heat transfer, increased flow process again, the heat exchange effect is improved greatly: simultaneously, the resistance to deformation of the interior pipe of composite screw shape and the freeze proof ability of splitting all are higher than common straight interior pipe; Enforcement of the present utility model just is processed into helical form with common straight interior pipe, and processing technology simple production cost is lower than internal and external threads pipe and internally finned tube, and is good in economic efficiency.

Further specify the utility model below in conjunction with drawings and Examples:

Fig. 1 is the partial sectional view of an embodiment of the present utility model;

Fig. 2 is the schematic cross-section of the shell of an embodiment of the present utility model;

As shown in Figure 1 and Figure 2, double pipe heat exchanger described in the utility model comprises in many that are sleeved in the shell 1 manages 2, the two ends of shell 1 have tube sheet, the two ends of interior pipe 2 are fixed on the tube sheet, interior pipe 2 is many helix tubes of 3-8 group, the equal pencil in the shape of a spiral of pipe 2 in each group, also shape in the shape of a spiral of the axis of this 3-8 group helix tube simultaneously.In pipe 2 helical angle be 10 degree-45 degree, the helical angle of the axis of the helix tube of pipe 2 is 10 degree-45 degree in the described formation.

During production and processing if will be common straight in pipe 2 be divided into the 3-8 group, with each group straight in pipe 2 twist into the helix tubes that helical angle is 10 degree-45 degree, will twist in the 3-8 group of helix tube pipe again and form one to restraint and twist into helical angle greatly be that the helix tubes that 10 degree-45 are spent get final product.

Claims (2)

1, a kind of double pipe heat exchanger of air-conditioning unit use, comprise pipe (2) in many that are sleeved in the shell (1), the two ends of shell (1) have tube sheet, the two ends of interior pipe (2) are fixed on the tube sheet (3), it is characterized in that: interior pipe (2) is many helix tubes of 3-8 group, the equal pencil in the shape of a spiral of pipe (2) in each group, also shape in the shape of a spiral of the axis of this 3-8 group helix tube simultaneously.

2, the double pipe heat exchanger of air-conditioning unit use according to claim 1 is characterized in that: the helical angle of pipe (2) is 10 degree-45 degree in described, and the helical angle of the axis of the helix tube of the interior pipe of described formation (2) is 10 degree-45 degree.