CN220303939U - Three-section type cryogenic evaporator - Google Patents

Abstract

The utility model discloses a three-section type cryogenic evaporator, which comprises an evaporator body, wherein a bracket is fixedly arranged below the evaporator body, two sides of the evaporator body are respectively provided with a variable-diameter air inlet and a variable-diameter air outlet, the middle part of the evaporator body is provided with a plurality of groups of cooling coils, the cooling coils are communicated with the inside of the evaporator body, the inner top and the inner bottom of each cooling coil are respectively provided with an upper header and a lower header, the upper header and the lower header are connected through a plurality of U-shaped heat exchange tube pipelines which are arranged in parallel, and a plurality of baffles are fixedly arranged in each upper header and each lower header; through setting up header and header internal baffle, make intraductal flow area can change along with the change of intraductal evaporation gas volume, the refrigerant evaporation capacity is less, and the U-shaped heat transfer tube quantity that occupies is few, and when the refrigerant evaporation capacity is great, occupies a plurality of U-shaped heat transfer tubes and carries out heat transfer for the circulation of refrigerant, effectively reduces evaporating temperature.

Description

Three-section type cryogenic evaporator

Technical Field

The utility model relates to the technical field of heat exchange, in particular to a three-section type cryogenic evaporator.

Background

In the technical field of heat exchange, an existing evaporation refrigerator generally uses a group of heat exchange tube units for heat exchange, the heat exchange effect is not obvious, or uses a plurality of groups of same heat exchange units, each group of heat exchange tube units is formed by connecting a plurality of heat exchange tubes end to end, refrigerant flows in and out of each heat exchange tube, the flow area in the tube is the same and the flow area in a main tube is constant, thus when different refrigeration conditions are met, flexible change cannot be carried out, when the working pressure is smaller, the condition of insufficient evaporation of the refrigerant can occur, when the working pressure is larger, the refrigeration effect can not reach the expected condition, the power consumption of a compressor is increased, and the refrigeration performance is reduced.

Disclosure of Invention

The present utility model aims to solve at least one of the problems in the prior art, and therefore, we provide a three-stage cryogenic evaporator.

The technical scheme adopted by the utility model is as follows:

the utility model provides a syllogic cryogenic evaporator, includes the evaporimeter body, the support has set firmly to the evaporimeter body below, the both sides of evaporimeter body are equipped with reducing air intake and reducing air outlet respectively, the middle part of evaporimeter body is equipped with multiunit cooling coil, cooling coil with the inside of evaporimeter body communicates with each other, cooling coil's interior top and inner bottom are equipped with header and lower header respectively, go up header and lower header between through the U-shaped heat exchange tube piping connection of a plurality of parallel arrangement, go up header and lower header in all set firmly the polylith baffle and change the flow area, for example: the refrigerant enters the lower header through the upper header through a single pipe and returns to the upper header through a plurality of pipes to flexibly increase the flow area, and the U-shaped heat exchange pipes are fixedly connected with heat absorption fins.

According to the three-section cryogenic evaporator, the cooling coils are three groups, namely a first cooling coil, a second cooling coil and a third cooling coil, the top of each group of cooling coils is provided with a refrigerant inlet and a refrigerant outlet, the refrigerant inlet and the refrigerant outlet penetrate through the top of the cooling coils and are communicated with the upper header, and the plurality of groups of cooling coils can ensure to obtain ideal refrigeration effect.

According to the three-section cryogenic evaporator, the U-shaped heat exchange tube of the first cooling coil is provided with four U-shaped bends, and the U-shaped heat exchange tubes of the second cooling coil and the third cooling coil are provided with two U-shaped bends, so that the refrigerant in the first cooling coil can obtain more in-tube flow area, and a better refrigerating effect is obtained.

According to the three-section cryogenic evaporator, the baffle is arranged at different installation intervals in the upper header and the lower header, and the header baffle divides the upper header and the lower header into a plurality of spaces with different sizes, so that the flow area in the tube can be automatically changed according to the change of the evaporation capacity of the refrigerant, the inlet of one U-shaped heat exchange tube, the outlet of a plurality of U-shaped heat exchange tubes, the inlet of a plurality of U-shaped heat exchange tubes, the outlet of a single U-shaped heat exchange tube, the uniform distribution of fluid in the cooling coil and the small pressure difference are realized.

According to the three-section cryogenic evaporator, the U-shaped heat exchange tube and the heat absorption fins are welded by laser, so that the gap thermal resistance of the U-shaped heat exchange tube is eliminated.

By adopting the technical scheme, compared with the prior art, the utility model has the following technical progress:

1. the multi-path refrigerant enters the evaporator, so that the temperature of a heat exchange coil of the evaporator is kept near the evaporation temperature, the heat exchange temperature difference is improved, the heat exchange intensity is improved, the medium gas temperature is gradually reduced, the cooling effect is obvious, the flow area in the tube can be changed along with the change of the evaporation gas quantity in the tube, the evaporation capacity of the refrigerant is small when the working temperature is low, the number of occupied U-shaped heat exchange tubes is small, the flow rate of the refrigerant in the U-shaped heat exchange tubes is low, the condition of insufficient evaporation is avoided, the evaporation capacity of the refrigerant is large when the working temperature is high, and a plurality of U-shaped heat exchange tubes are occupied for heat exchange, so that the circulation of the refrigerant is quickened, and the evaporation temperature is effectively reduced;

2. the circulation of the refrigerant in the upper header and the lower header can be realized through a single or a plurality of U-shaped heat exchange tubes according to actual conditions, the pressure difference among the refrigerant in the upper header, the lower header and the U-shaped heat exchange tubes is small, the resistance of the refrigerant outlet is small, the resistance of the fluid in the tubes can be reduced to the greatest extent, the pressure of the suction inlet of the compressor is balanced, the pressure caused to the compressor is small, the compressor can be kept to work continuously at the same frequency, the power consumption loss is reduced, and the refrigerating performance is improved;

3. through setting up first cooling coil, second cooling coil and third cooling coil, the modularized design is dismantled conveniently, is convenient for clear up cleanly.

Drawings

The utility model is further described below with reference to the drawings and examples;

FIG. 1 is an overall block diagram of the present utility model;

FIG. 2 is an internal block diagram of the first cooling coil of the present utility model with heat sink fins removed;

FIG. 3 is an internal block diagram of the second and third cooling coils of the present utility model with heat sink fins removed;

FIG. 4 is a top plan view of the upper header of the first cooling coil of the present utility model;

FIG. 5 is a bottom view of the lower header of the first cooling coil of the present utility model;

FIG. 6 is a schematic view of the structure of the U-shaped heat exchange tube of the present utility model.

Legend description:

1. an evaporator body; 2. a bracket; 3. a reducing air inlet; 4. reducing air outlet; 5. a cooling coil; 51. a first cooling coil; 52. a second cooling coil; 53. a third cooling coil; 6. a refrigerant inlet; 7. a refrigerant outlet; 8. u-shaped heat exchange tube; 9. an upper header; 10. a lower header; 11. a heat absorbing fin; 12. a heat exchange tube refrigerant inlet; 13. a heat exchange tube refrigerant outlet; 14. header baffles.

Detailed Description

Reference will now be made in detail to the present embodiments of the present utility model, examples of which are illustrated in the accompanying drawings, wherein the accompanying drawings are used to supplement the description of the written description so that one can intuitively and intuitively understand each technical feature and overall technical scheme of the present utility model, but not to limit the scope of the present utility model.

Example 1

Referring to fig. 1-6, the utility model provides a three-stage cryogenic evaporator, which comprises an evaporator body 1, a bracket 2 is fixedly arranged below the evaporator body 1, reducing air inlets 3 and reducing air outlets 4 are respectively arranged on two sides of the evaporator body 1, a plurality of groups of cooling coils 5 are arranged in the middle of the evaporator body 1, the cooling coils 5 are communicated with the inside of the evaporator body 1, an upper header 9 and a lower header 10 are respectively arranged at the inner top and the inner bottom of the cooling coils 5, the upper header 9 and the lower header 10 are connected through a plurality of parallel U-shaped heat exchange tubes 8, a plurality of header baffles 14 are fixedly arranged in the upper header 9 and the lower header 10, heat absorption fins 11 are fixedly connected on the U-shaped heat exchange tubes 8, the cooling coils 5 are three groups of cooling coils, a first cooling coil 51, a second cooling coil 52 and a third cooling coil 53 are respectively arranged at the top of each group of cooling coils 5, a refrigerant inlet 6 and a refrigerant outlet 7 are respectively arranged at the top of each group of cooling coils 5, a U-shaped heat exchange tube 8 of the first cooling coil 51 is provided with four-way bends, the second cooling coil 52 and the third cooling coil 53 are respectively provided with a plurality of cooling coils which have the same cooling medium which can flow into the cooling tubes of the first cooling coils 1, and the two-way heat exchange tubes of the cooling coils 53 of the evaporator body, and the cooling medium of the cooling coils of the first cooling coil 1 have the cooling medium which has the same cooling medium which can flow into the cooling channels of the cooling coils.

Example 2

Referring to fig. 1-6, the utility model provides a three-stage cryogenic evaporator, in which the mounting intervals of the header baffles 14 in the upper header 9 and the lower header 10 are different, the header baffles 14 divide the upper header 9 and the lower header 10 into a plurality of spaces containing different ports of the U-shaped heat exchange tubes 8, so that the number of the tubes for the refrigerant to enter the lower header 10 from the upper header 9 is variable, the refrigerant can enter from at most two heat exchange tube refrigerant inlets 12 for the first time, can return to the upper header 9 from at most four heat exchange tube refrigerant inlets 12 after reaching the lower header 10, and can return to the upper header 9 from at most six heat exchange tube refrigerant inlets 12 after repeated times and be discharged through the refrigerant outlet 7, thereby flexibly changing the number of the tubes flowing through the U-shaped heat exchange tubes 8 according to different evaporation amounts of the refrigerant under working conditions, flexibly changing the flow area of the tubes, and having better refrigerating effect.

Working principle: in operation, refrigerant enters from the refrigerant inlet 6 at the top of each group of cooling coils 5, enters the upper header 9 and then enters from the heat exchange tube refrigerant inlet 12, begins to absorb heat and evaporate in the process of passing through the U-shaped heat exchange tubes 8, enters the lower header 10 through the heat exchange tube refrigerant outlet 13 of the lower header 10, and can automatically enter the proper number of U-shaped heat exchange tubes 8 according to the difference of the heat absorption and evaporation amount due to the difference of the space size between the upper header 9 and the lower header 10 and the number of the U-shaped heat exchange tubes 8 contained in each space, the refrigerant evaporation amount is large when the temperature is high, the refrigerant evaporation gas enters from the plurality of heat exchange tube refrigerant inlets 12, flows out from the plurality of heat exchange tube refrigerant outlets 13 in the lower header 10, then returns to the upper header 9 from the plurality of heat exchange tube refrigerant inlets 12, the refrigerant evaporation amount is small when the temperature is lower, the refrigerant evaporation gas enters from the single heat exchange tube refrigerant inlet 12 of the upper header 9, then returns to the upper header 9 from the single heat exchange tube refrigerant inlet 12 of the lower header 10, and the refrigerant is repeatedly circulated between the upper header 9 and the lower header 10 through the single or multiple U-shaped heat exchange tubes 8 according to the actual conditions until reaching the last group of heat exchange tube refrigerant outlets 13 of the upper header 10, is discharged through the refrigerant outlets 7, the medium gas nitrogen passes through the U-shaped heat exchange tubes 8 of the first cooling coil 51, the heat is transferred into the U-shaped heat exchange tubes 8 through the heat absorption fins 11, the refrigerant absorbs heat and evaporates, the medium gas nitrogen releases heat and cools down, then reaches the second cooling coil 52, sequentially passes through the second cooling coil 52 and the third cooling coil 53, and finally is discharged from the variable-diameter air outlet 4, and the refrigeration and cooling work is completed.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the above embodiments, and various changes can be made within the knowledge of one of ordinary skill in the art without departing from the spirit of the present utility model.

Claims (5)

1. The utility model provides a syllogic cryogenic evaporator, its characterized in that, includes evaporator body (1), support (2) have been set firmly to the below of evaporator body (1), the both sides of evaporator body (1) are equipped with reducing air intake (3) and reducing air outlet (4) respectively, the middle part of evaporator body (1) is equipped with multiunit cooling coil (5), cooling coil (5) with the inside of evaporator body (1) communicates with each other, the interior top and the inner bottom of cooling coil (5) are equipped with header (9) and lower header (10) respectively, go up header (9) and lower header (10) between through a plurality of parallel arrangement's U-shaped heat exchange tube (8) pipe connection, all set firmly polylith header baffle (14) in last header (9) and the lower header (10), the rigid coupling has heat absorption fin (11) on U-shaped heat exchange tube (8).

2. The three-stage cryogenic evaporator according to claim 1, characterized in that the cooling coils (5) are three groups, namely a first cooling coil (51), a second cooling coil (52) and a third cooling coil (53), the top of each group of cooling coils (5) is provided with a refrigerant inlet (6) and a refrigerant outlet (7), and the refrigerant inlet (6) and the refrigerant outlet (7) are communicated with the upper header (9) through the top of the cooling coils (5).

3. The three-stage cryogenic evaporator according to claim 2, characterized in that the U-shaped heat exchange tube (8) of the first cooling coil (51) is provided with four U-bends, and the U-shaped heat exchange tubes (8) of the second cooling coil (52) and the third cooling coil (53) are provided with two U-bends.

4. The three-stage cryogenic evaporator according to claim 1, characterized in that the header baffles (14) differ in the mounting interval in the upper header (9) and the lower header (10), the header baffles (14) separating the upper header (9) and the lower header (10) into a plurality of spaces of different sizes.

5. The three-stage cryogenic evaporator according to claim 1, characterized in that the U-shaped heat exchange tube (8) and the heat absorbing fins (11) are laser welded.