CN1601206A

CN1601206A - Evaporator in use for large size of freezer unit

Info

Publication number: CN1601206A
Application number: CN 200410067226
Authority: CN
Inventors: 郑传祥
Original assignee: Zhejiang University ZJU
Current assignee: Zhejiang University ZJU
Priority date: 2004-10-13
Filing date: 2004-10-13
Publication date: 2005-03-30
Anticipated expiration: 2024-10-13
Also published as: CN1300531C

Abstract

The invention discloses an evaporator for large-scale instant freezer, including several fins arranged at regular intervals on the outer expansion sleeve of refrigerating pipe, the refrigerating pipe is fixed on the fixed plates on two ends, the refrigerant inlet of the refrigerating pipe between layers circles in the fins and fixed plates and then connects with the refrigerant steam of the refrigerating pipe at the same layer, the refrigerant inlets of the refrigerating pipe between layers are connected through straight pipes; the inner wall of the refrigerating pipe is fully distributed with zigzag inner fins or inner fins radiating from the inner wall to central solid circular stick. The invention uses reinforced heat transmission in and outside the pipe to make larger increase on the heat transmission efficiency of the evaporator, and because of the increase of evaporator efficiency, it reduces the bulk of the evaporator, thus by a large margin reducing the bulk of the whole instant freezer.

Description

Evaporator in use for large size of freezer unit

Technical field

The present invention relates to a kind of heat-exchange device, especially relate to a kind of evaporator in use for large size of freezer unit.

Background technology

China's quick freezing unit is in introduction, digestion phase at present, technical merit has much room for improvement, energy consumption is higher, and volume is bigger, more than the general power consumption 30Kwh/t, quick-frozen production capacity is below 2.5 tons/hour, volume ratio is external similar big more than 30%, and the overseas equipment power consumption is between 18-25Kwh/t, and quick-frozen production capacity can reach more than 16 tons/hour, and can also increase according to user's needs, potentiality to be exploited is very big.The evaporator effectiveness of China's exploitation at present is low, generally uses diameter 32mm, and perhaps the big caliber of diameter 25mm is processed into the cold wind unit, jacket panel diameter 96mm; And adopt diameter 19mm abroad, and the perhaps efficient pipe of diameter 12mm, fin height is in 20mm, and the heat release benefit is domestic more than 2 times.Same disengagement area, the volume of import equipment is much smaller, and the function of holding the frost layer is big, and the defrosting cycle is long relatively.The evaporimeter volume of home equipment is huge, makes the quick-freezing plant volume also very big, and the instant freezer volume of homemade 1 ton of/hour quick freezing unit is 100-120 cube, and only 91 cubes of the instant freezer volumes of 4 tons/hour of import equipments, both differ greatly.Another is present evaporimeter cover sheet mode, and quality is extremely unstable.The heavy caliber nest plate is owing to expand tube dynamics deficiency, and pipe is not that line contacts with nest plate, but the some contact causes evaporimeter refrigerating capacity wretched insufficiency.The present invention proposes high-efficiency evaporator and solves the low problem of heat transfer efficiency.

Summary of the invention

The object of the present invention is to provide the evaporator in use for large size of freezer unit of the augmentation of heat transfer that combines in a kind of pipe and outside the pipe.

The technical solution adopted for the present invention to solve the technical problems is: the outer expansion set of refrigerator pipes that is included in evaporimeter has several pieces fins of equidistant arrangement, refrigerator pipes is fixed on the fixed head at two ends, the refrigerant inlet of the refrigerator pipes of every interlayer is connected with cold-producing medium evaporation back vapor outlet port with the refrigerator pipes of one deck after backhaul is spiraled in fin, fixed head through refrigerator pipes, the refrigerant inlet of the refrigerator pipes of every interlayer is connected with straight tube, and the cold-producing medium evaporation back vapor outlet port of the refrigerator pipes of every interlayer is connected with another straight tube; Described refrigerator pipes inner tubal wall is to be covered with zigzag inner fin or the refrigerator pipes inner tubal wall inner fin to the solid pole radiation in center.

The useful effect that the present invention has is: it is to utilize in the pipe and the outer augmentation of heat transfer that combines of pipe, the heat transfer efficiency of evaporimeter is greatly improved, because the raising of evaporator effectiveness, the evaporimeter volume is dwindled, thereby the volume of whole instant freezer is significantly dwindled, and economic benefit is improved.

Description of drawings

Fig. 1 is that the master of structure of the present invention looks schematic diagram;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the left view of Fig. 1;

Fig. 4 is the C-C view of Fig. 1 refrigerator pipes;

Fig. 5 is a stereogram of the present invention.

Among the figure: a, refrigerant inlet, b, cold-producing medium evaporation back steam (vapor) outlet, 1, refrigerator pipes, 2, fin, 3, cold-producing medium, 4, the two ends fixed head, 5, straight tube, 6, straight tube, 7, the zigzag inner fin, 8, inner fin, 9, solid pole.

The specific embodiment

The invention will be further described below in conjunction with drawings and Examples.

As Fig. 1, Fig. 2, shown in Figure 3, the refrigerator pipes 1 outer expansion set that present invention resides in evaporimeter has several pieces fins 2 of equidistant arrangement, refrigerator pipes 1 is fixed on the fixed head 4 at two ends, the refrigerant inlet a of the refrigerator pipes 1 of every interlayer is connected with cold-producing medium evaporation back vapor outlet port b with the refrigerator pipes 1 of one deck after backhaul is spiraled in fin 2, fixed head 4 through refrigerator pipes 1, the refrigerant inlet a of the refrigerator pipes 1 of every interlayer is connected with straight tube 5, and the cold-producing medium evaporation back vapor outlet port b of the refrigerator pipes 1 of every interlayer is connected with another straight tube 6; Described refrigerator pipes 1 inner tubal wall is to be covered with zigzag inner fin 7 or the refrigerator pipes 1 inner tubal wall inner fin 8 to solid pole 9 radiation in center.

Described refrigerator pipes 1 is that external diameter is the steel pipe of 14mm-20mm, and fin 2 is the aluminium flake of 0.2-0.6mm, and the spacing of two fins 2 is 10-28mm.

Described fin 2 surfaces are flat or corrugated surfaces, and fin shape is rectangle or circle.

Operation principle of the present invention is as follows:

Cold-producing medium 3 enters from refrigerant inlet a, absorb a large amount of heats through evaporimeter heat exchange evaporation back, becoming steam flows out from cold-producing medium evaporation back vapor outlet port b, high speed winds flows through from the lateral vertical refrigerator pipes 1 of evaporimeter, cold-producing medium 3 evaporation backs in the cooled pipe 1 of a large amount of heats absorb, become cold wind and can freeze required material, cold-producing medium 3 is walked a plurality of backhauls and is fully evaporated the absorption heat later in refrigerator pipes 1.The number of plies of the backhaul number of the sheet number of fin 2, refrigerator pipes 1, refrigerator pipes 1 how much determining on the evaporimeter by the material that is cooled.This structure is greatly improved heat transfer coefficient, thereby can dwindles the volume of quick-freezing room owing to adopted the inside and outside augmentation of heat transfer simultaneously of special pipe, reduces the volume and the energy consumption of quick freezing unit, dwindles the gap with foreign technology greatly.

Claims

1, a kind of evaporator in use for large size of freezer unit, it is characterized in that: the outer expansion set of refrigerator pipes (1) that is included in evaporimeter has several pieces fins (2) of equidistant arrangement, refrigerator pipes (1) is fixed on the fixed head (4) at two ends, the refrigerant inlet (a) of the refrigerator pipes of every interlayer (1) through refrigerator pipes (1) in fin (2), in the fixed head (4) backhaul spiral the back with the cold-producing medium evaporation of the refrigerator pipes (1) of one deck afterwards vapor outlet port (b) be connected, the refrigerant inlet (a) of the refrigerator pipes of every interlayer (1) is connected with straight tube (5), and the cold-producing medium evaporation back vapor outlet port (b) of the refrigerator pipes of every interlayer (1) is connected with another straight tube (6); Described refrigerator pipes (1) inner tubal wall is for being covered with zigzag inner fin (7) or refrigerator pipes (1) the inner tubal wall inner fin (8) to the solid pole in center (9) radiation.

2, a kind of evaporator in use for large size of freezer unit according to claim 1 is characterized in that: described refrigerator pipes (1) is that external diameter is the steel pipe of 14mm-20mm, and fin (2) is the aluminium flake of 0.2-0.6mm, and the spacing of two fins (2) is 10-28mm.

3, a kind of evaporator in use for large size of freezer unit according to claim 1 and 2 is characterized in that: described fin (2) surface is flat or corrugated surface, and fin shape is rectangle or circle.