CN2826313Y

CN2826313Y - Evaporator with rotary finned tubes

Info

Publication number: CN2826313Y
Application number: CN 200520092892
Authority: CN
Inventors: 康景隆
Original assignee: Individual
Current assignee: Individual
Priority date: 2005-10-14
Filing date: 2005-10-14
Publication date: 2006-10-11
Anticipated expiration: 2015-10-14

Abstract

The utility model relates to an evaporator with rotary finned tubes, which relates to an evaporator used for equipment for refrigeration, quick freezing, freeze drying, etc. The design of the utility model is the improvement of the structure of the evaporator. The utility model solves the technical problems of energy source wasting and high production cost of an evaporator with fixed finned tubes. The evaporator with rotary finned tubes is composed of fins, liquid guiding tubes, a liquid collecting tube, a rotary shaft, a liquid ingress tube, a liquid returning tube, a liquid ingress rotating joint, a liquid returning rotating joint, a bearing and a transmission chainwheel, wherein the fins which are made into a rectangle are connected in series into a finned tube members with double rows of the liquid guiding tubes and the finned tube members are radially installed along the circumference. The utility model has the advantages that the upwind lateral area is increased by more than 10 times, and the defrosting intervals are prolonged. Therefore, energy sources which are wasted due to frost removal and the production time of the stopped production due to the frost removal are saved and the total cost of production is reduced.

Description

Rotary finned tube evaporator

Technical field: the invention relates to the evaporimeter in refrigeration, quick freezing, freeze drying and other heat-exchange apparatus, is the improvement to evaporation structure.

Background technology: at present, in refrigeration, quick freezing, freeze drying and other heat-exchange apparatus, adopt fixed finned-tube evaporator, as operating condition be: 1000 kilograms/hour of freeze capacities (in French bean); Solidification point-35 ℃; Evaporating temperature t _Z=-40 ℃; Condensation temperature t _l=35 ℃; About about 12 square metres of the windward side area of the fixed finned-tube evaporator that is adopted, fixed finned-tube evaporator moves under the low temperature and moisture operating mode in freezing room, the finned tube component surface of evaporimeter, covered by the frost layer gradually, reduce thereby cause conducting heat, air flow resistance increases, finally cause operating condition to worsen, be forced to breaks in production and necessary defrosting, experience shows that defrosting time was generally 8～10 hours at interval, about 90 minutes of each defrosting, therefore about 60 minutes of defrosting back reducing temperature twice has reduced the production time, and the serious waste energy; Fixed finned-tube evaporator, between finned tube component surface and air-flow, have flow boundary layer between inside pipe wall and cold-producing medium, flow boundary layer is bigger to the influence of film coefficient of heat transfer α value, if want to improve film coefficient of heat transfer α value, must destroy this two flow boundary layers, thereby the necessary flow velocity that improves cold-producing medium and air-flow, for improving flow velocity, mechanical output is increased considerably, this produces new contradiction again, increasing the consumption of cost, is infeasible; Fixed finned-tube evaporator, the cold-producing medium that is flowing in the pipe can form oil film with in the lubricating oil lead-in tube on tube wall, and this layer oil film effect evaporimeter heat exchange efficiency can make the evaporimeter heat exchange efficiency reduce, and causes the bad condition operation.

Summary of the invention: the purpose of the invention provides a kind of energy savings, reduces production costs, and is used for freezing, the rotary finned tube evaporator of quick freezing, freeze drying equipment; The purpose of the invention is achieved through the following technical solutions: rotary finned tube evaporator: comprise feed tube, liquid back pipe, fin, catheter, it is characterized in that fin is ganged up with double catheter install to form the finned tube member, the finned tube member is arranged along the circumference radiation, the two ends of the double catheter in the finned tube member link to each other with collector tube respectively, catheter communicates with the collector tube inner chamber, collector tube is installed in the rotating shaft two ends, the feed liquor swivel joint is installed at the rotating shaft two ends respectively, return the liquid swivel joint, advance, the inner chamber that returns the liquid swivel joint communicates with the collector tube inner chamber, rotating shaft one end is installed drive sprocket, bearing is installed at the rotating shaft two ends, will advance, liquid back pipe is installed in respectively into, return on the liquid swivel joint.

The advantage of the invention: be the radiation arrangement because the finned tube member in the rotary finned tube evaporator adopts along circumference,, the windward side area of rotary finned tube evaporator increased when the rotary finned tube evaporator rotation; Again because the rotation of rotary finned tube evaporator, the flow boundary layer between refrigerating fluid and inside pipe wall and the flow boundary layer of air-flow and finned tube component surface in catheter, the collector tube have been destroyed, improved film coefficient of heat transfer α value, improved the heat exchange effect, therefore fixed finned-tube evaporator defrost interval was prolonged in 8～10 hours, more fixed finned-tube evaporator reduces the number of times of defrosting, save the energy that reducing temperature twice consumed that resumes production after the hot gas energy that each defrosting consumed and the defrosting, significantly reduced the totle drilling cost of producing.

Description of drawings:

Fig. 1 is the rotary finned tube evaporator structural representation;

Fig. 2 is the side view of Fig. 1.

The specific embodiment: in operating condition: 1000 kilograms/hour of freeze capacities (with French bean); Solidification point-35 ℃; Evaporating temperature t _Z=-40 ℃; Condensation temperature t _e=35 ℃ refrigeration plant is an example: rotary finned tube evaporator, by fin 10, catheter 3, collector tube 9, rotating shaft 4, feed liquor swivel joint 7, fluid swivel joint 2, drive sprocket 5, bearing 6, feed tube 8, liquid back pipe 1 constitutes, fin is made rectangle, gang up installation with double catheter and form the finned tube member, the rectangular sheet in 10 holes is made fin in this case, with catheter fin is ganged up installation and form the finned tube member, double catheter is made up of 5 of every rows, the finned tube member is radiation along circumference to be arranged, this case has been adopted 16 finned tube members to be radiation and has been arranged, catheter two ends in the finned tube member are linked to each other with the collector tube at two ends respectively, collector tube is communicated with the catheter inner chamber, to advance, go back to the two ends that the liquid swivel joint is installed in rotating shaft, rotating shaft with advance, return between the liquid swivel joint and can relatively rotate, collector tube is installed in the two ends of rotating shaft, make the collector tube inner chamber and advance, the inner chamber that returns the liquid swivel joint communicates, at rotating shaft one end drive sprocket is installed, bearing is installed at the rotating shaft two ends, the bearings rotary finned tube evaporator, drive sprocket is in order to linking to each other with transmission mechanism, under the transmission mechanism effect, rotary finned tube evaporator is rotated, advance, return the liquid swivel joint and be in not rotary state, guarantee and advance, the connection that liquid back pipe is good, be unlikely to cause the leakage of refrigerating fluid, owing to adopted the rotating fins pipe evaporator, refrigeration system be arranged on the refrigeration quick freezing, outside the equipment such as freeze drying.

Rotary finned tube evaporator rotates in the freezing room of equipment such as refrigeration, quick freezing, freeze drying, and the evaporimeter of rotation is taken away the heat in the freezing room through the finned tube member, reaches purposes such as refrigeration, quick freezing, freeze drying.Because evaporimeter is in rotation status, cold-producing medium flows in catheter, inside pipe wall had agitaion, interior cold-producing medium of catheter and collector tube and the flow boundary layer between inside pipe wall have been destroyed, again because evaporimeter rotates by certain rotating speed, make finned tube member and air-flow produce relative motion, air-flow velocity improves relatively, and air-flow had agitaion, destroy the flow boundary layer between air-flow and finned tube component surface, under the prerequisite of destroying two flow boundary layers, thereby improve film coefficient of heat transfer α value, improved heat exchange efficiency; Rotary finned tube evaporator, rotating back windward side area has increased for about 12 square metres than fixed finned-tube evaporator windward side area, with above-mentioned operating mode is that the R22 system and the R717 system freezing equipment front face area of example is big more than 10 times, the windward side area reaches about 148 square metres, under above-mentioned same operating condition, fixed finned-tube evaporator, defrosted once in every interval in 8～10 hours, rotary finned tube evaporator windward side area is that fixed finned-tube evaporator windward side area is more than 10 times, therefore the rotary finned tube evaporator defrost interval extended to about 100 hours, that is to say, fixed finned-tube evaporator defrosting ten times, rotary finned tube evaporator just defrosts once, is significantly thereby save the energy of wasting because of defrosting with the time that stops to produce, and has reduced production cost.

Rotary finned tube evaporator and the energy-conservation comparison of fixed finned-tube evaporator

Owing to adopted rotary finned tube evaporator, adopt the outer circulation refrigeration, avoid lubricating oil to enter in the pipe of cryogenic system, thereby prevent that film coefficient of heat transfer α value from reducing, avoid ammonia system to enter the intensive job shop of personnel simultaneously, eliminate safe hidden trouble.

Claims

1, rotary finned tube evaporator: comprise feed tube, liquid back pipe, fin, catheter, it is characterized in that fin is ganged up with double catheter install to form the finned tube member, the finned tube member is arranged along the circumference radiation, the two ends of the double catheter in the finned tube member link to each other with collector tube respectively, catheter communicates with the collector tube inner chamber, collector tube is installed in the rotating shaft two ends, the feed liquor swivel joint is installed at the rotating shaft two ends respectively, return the liquid swivel joint, advance, the inner chamber that returns the liquid swivel joint communicates with the collector tube inner chamber, rotating shaft one end is installed drive sprocket, and bearing is installed at the rotating shaft two ends, will advance, liquid back pipe is installed in respectively into, return on the liquid swivel joint.