CN210861823U

CN210861823U - Cooling liquid evaporator

Info

Publication number: CN210861823U
Application number: CN201921700841.8U
Authority: CN
Inventors: 宁静红; 刘兴华
Original assignee: Tianjin University of Commerce
Current assignee: Tianjin University of Commerce
Priority date: 2019-10-11
Filing date: 2019-10-11
Publication date: 2020-06-26
Anticipated expiration: 2029-10-11

Abstract

The utility model discloses a cooling liquid evaporator, which comprises a shell, a plurality of fan-shaped heat exchange tubes, an inner heat exchange tube, and winding pieces, wherein the two ends of the fan-shaped heat exchange tubes are arranged in tube plates at the two ends of the shell and can be spliced into a circular ring-shaped structure; the shell is provided with a first secondary refrigerant inlet connecting pipe and a first secondary refrigerant outlet connecting pipe, end sockets are arranged outside the tube plate, one end socket is provided with a refrigerant liquid inlet connecting pipe, a refrigerant gas outlet connecting pipe and a second secondary refrigerant inlet connecting pipe, the other end socket is provided with a bleed air connecting pipe and a second secondary refrigerant outlet connecting pipe, and the inner ends of the second secondary refrigerant inlet connecting pipe and the second secondary refrigerant outlet connecting pipe are arranged at the hole of the tube plate; the cavity between the end socket on the side of the refrigerant liquid inlet connecting pipe and the end plate is provided with a partition plate to divide the interior into two cavities, and the refrigerant liquid inlet connecting pipe is communicated with the inner cavity. The utility model discloses two kinds of fluids of secondary refrigerant and refrigerant utilize the heat transfer pipe outward winding piece, increase the fluid disturbance and conduct heat with high efficiency.

Description

Cooling liquid evaporator

Technical Field

The utility model relates to a refrigeration technology field, concretely relates to high-efficient cooling liquid evaporator.

Background

The evaporators of large refrigeration systems such as ice making pool low-temperature brine preparation and central air-conditioning fan coil chilled water preparation are shell-and-tube type, so that secondary refrigerant liquid such as brine and chilled water is prepared, two fluids of the secondary refrigerant and the refrigerant exchange heat, the refrigerant absorbs heat and evaporates, and the secondary refrigerant releases heat and cools. The existing cooling liquid evaporator has large overall dimension, large refrigerant filling amount, more material consumption and larger heat transfer temperature difference, thus leading to the reduction of heat transfer performance, the increase of the pressure ratio of a refrigeration compressor, the reduction of the performance of a refrigeration system and the increase of energy consumption. Therefore, it is of great significance to develop an efficient and compact cooling liquid evaporator to improve the heat transfer efficiency of the cooling liquid evaporator and the performance of the refrigeration system.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical defect who exists among the prior art, provide a refrigerating system is with high-efficient cooling liquid evaporator to solve the two kinds of fluidic high-efficient heat transfer of secondary refrigerant and refrigerant, realize refrigerating system's performance improvement, the energy saving.

The utility model provides a technical scheme that its technical problem adopted is:

a cooling liquid evaporator comprises a shell, a plurality of fan-ring-shaped heat exchange tubes and an inner heat exchange tube, wherein the two ends of the fan-ring-shaped heat exchange tubes are arranged in tube plates at the two ends of the shell and can be spliced into a ring-shaped structure; a first secondary refrigerant inlet connecting pipe and a first secondary refrigerant outlet connecting pipe are arranged on the shell, sealing heads are respectively arranged on the outer sides of the tube plates, a refrigerant liquid inlet connecting pipe, a refrigerant gas outlet connecting pipe and a second secondary refrigerant inlet connecting pipe are arranged on one sealing head, a bleed air connecting pipe and a second secondary refrigerant outlet connecting pipe are arranged on the other sealing head, and the inner ends of the second secondary refrigerant inlet connecting pipe and the second secondary refrigerant outlet connecting pipe are arranged in the holes of the corresponding tube plates; the end socket provided with the refrigerant liquid inlet connecting pipe and a cavity formed by the corresponding end plate are internally provided with an annular partition plate to divide the interior of the end socket into two cavities which are separated from the inside and the outside, the refrigerant liquid inlet connecting pipe is communicated with the cavity on the inside so that the refrigerant liquid entering the cavity on the inside enters the inner heat exchange pipe, is deflected from the end socket at the other end, returns to the cavity on the outside through the fan-ring-shaped heat exchange pipe and is discharged through the refrigerant gas outlet connecting pipe.

The second secondary refrigerant inlet connecting pipe and the second secondary refrigerant outlet connecting pipe are oppositely arranged, the second secondary refrigerant inlet connecting pipe penetrates through the cavity on the inner side, and the connecting axis of the second secondary refrigerant inlet connecting pipe and the second secondary refrigerant outlet connecting pipe is positioned between the inner heat exchange pipe and the fan-shaped heat exchange pipe; the first secondary refrigerant inlet connecting pipe and the first secondary refrigerant outlet connecting pipe are respectively arranged at the top and the bottom of the shell and are respectively and correspondingly arranged close to one tube plate.

The refrigerant gas outlet connecting pipe is positioned at the top of the end socket and welded with the corresponding hole; the refrigerant liquid inlet connecting pipe is welded with the central orifice of the seal head; the air-entraining connecting pipe is positioned at the top of the end socket and is welded with the corresponding orifice.

And the edge of the end socket is welded with the corresponding connected tube plate.

The first secondary refrigerant inlet connecting pipe and the second secondary refrigerant inlet connecting pipe are connected with an outlet of the secondary refrigerant cycle, and the first secondary refrigerant outlet connecting pipe and the second secondary refrigerant outlet connecting pipe are connected with an inlet of the secondary refrigerant cycle.

The refrigerant liquid inlet connecting pipe is connected with the throttling and pressure reducing element outlet connecting pipe, and the bleed air connecting pipe is connected with the inlet of the refrigeration compressor after being connected with the outlet of the refrigerant gas outlet connecting pipe in parallel.

The utility model discloses a two kinds of fluids of secondary refrigerant and refrigerant utilize the winding piece outside the heat transfer pipe, increase fluidic disturbance, and simultaneously, compact structure reduces the volume of irritating of refrigeration working medium, solves the high-efficient heat transfer of two kinds of fluids of secondary refrigerant and refrigerant, realizes refrigerating system's performance improvement, the energy saving.

Drawings

FIG. 1 is a schematic view of a high efficiency cooling liquid evaporator of the present invention;

fig. 2 is a sectional view taken along line a-a of fig. 1.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments.

As shown in fig. 1 and 2, the high-efficiency cooling liquid evaporator of the present invention comprises:

the device comprises a first secondary refrigerant inlet connecting pipe 1, an outer shell 2, an outer pipe winding sheet 3, a first outer heat exchange pipe 4, a second pipe plate 5, a refrigerant gas outlet connecting pipe 6, a partition plate 7, a second secondary refrigerant inlet connecting pipe 8, a refrigerant liquid inlet connecting pipe 9, a second seal head 10, a first secondary refrigerant outlet connecting pipe 11, a third outer heat exchange pipe 12, an inner heat exchange pipe 13, an inner pipe winding sheet 14, a first pipe plate 15, a first seal head 16, a second secondary refrigerant outlet connecting pipe 17, a gas guide connecting pipe 18, a second outer heat exchange pipe 19 and a fourth outer heat exchange pipe 20.

In the utility model, the shell 2 is a hollow cylinder, two ends of which are open and respectively welded with the first tube plate 15 and the second tube plate 5; the first secondary refrigerant inlet connecting pipe 1 is welded with an orifice which is arranged on the upper part of the shell 2 and is close to the first tube plate 15, and the first secondary refrigerant outlet connecting pipe 11 is welded with an orifice which is arranged on the lower part of the shell 2 and is close to the second tube plate 5; the first outer heat exchange tube 4, the second outer heat exchange tube 19, the third outer heat exchange tube 12 and the fourth outer heat exchange tube 20 are of hollow local circular ring structures, side points in two-two contact are welded and fixed to be spliced into a complete circular ring, two ends of the first outer heat exchange tube pass through corresponding orifices of the first tube plate 15 and the second tube plate 5 respectively and are welded, sealed and fixed, the outer circle surface is wound with an outer tube winding piece 3, and two ends of the outer tube winding piece 3 are fixed with two ends of the outer heat exchange tubes in a spot welding mode.

The utility model discloses in, interior heat exchange tube 13 is located the center of outer heat exchange tube, and

first tube sheet

15 and 5 central drill way of second tube sheet are passed respectively at its both ends to welded seal is fixed, and its surface is around having the inner tube around piece 14, and the inner tube is fixed around the both ends spot welding of piece 14 and interior heat exchange tube 13.

The second secondary refrigerant outlet connecting pipe 17 passes through an orifice of the first end socket 16 and is welded with a corresponding orifice of the first tube plate 15 positioned at the upper part of the inner heat exchange tube 13; the second secondary refrigerant inlet connecting pipe 8 passes through the orifice of the second end socket 10 and is welded with the corresponding orifice of the first tube plate 15 which is positioned at the upper part of the inner heat exchange tube 13 and is close to the inner wall of the upper side of the partition plate 7.

The utility model discloses in, division board 7 is ring shape, is located second head 10, and its both ends respectively with second tube sheet 5 and the sealed cooperation of second head 10, with two cavitys of inside share of head.

The refrigerant gas outlet connecting pipe 6 is positioned at the top of the second seal head 10 and is welded with a corresponding hole, the refrigerant liquid inlet connecting pipe 9 is welded with a central hole of the second seal head 10, and the air entraining connecting pipe 18 is positioned at the top of the first seal head 16 and is welded with a corresponding hole.

The edge of the first end socket 16 is welded with the first tube plate 15, and the edge of the second end socket 10 is welded with the second tube plate 5.

The first secondary refrigerant inlet connecting pipe 1 and the second secondary refrigerant inlet connecting pipe 8 are connected with an outlet of a secondary refrigerant cycle, and the first secondary refrigerant outlet connecting pipe 11 and the second secondary refrigerant outlet connecting pipe 17 are connected with an inlet of the secondary refrigerant cycle;

the refrigerant liquid inlet connecting pipe 9 is connected with the throttling and pressure reducing element outlet connecting pipe, and the bleed air connecting pipe 18 is connected with the inlet of the refrigeration compressor after being connected with the outlet of the refrigerant gas outlet connecting pipe 6 in parallel.

When the refrigerating system operates, low-temperature liquid at the outlet of the throttling and pressure reducing element enters the inner heat exchange tube 13 after entering the inner cavity of the second end enclosure 10 through the refrigerant liquid inlet connecting tube 9, exchanges heat with secondary refrigerant flowing between the outer winding sheets of the inner heat exchange tube 13, absorbs heat and evaporates part of the liquid, gas and liquid enter the cavity of the first end enclosure 16, and gas is led out through the gas leading connecting tube 18; the liquid enters the first outer heat exchange tube 4, the second outer heat exchange tube 19, the third outer heat exchange tube 12 and the fourth outer heat exchange tube 20 respectively, continuously exchanges heat with the secondary refrigerant among the winding sheets outside the tubes, absorbs heat and evaporates to generate gas, enters the outer cavity of the second seal head 10, and enters the refrigeration compressor through the refrigerant gas outlet connecting tube 6.

It should be noted that, in the present invention, the plurality of fan-ring-shaped heat exchange tubes that can be spliced into the circular ring-shaped structure may be four or other heat exchange tubes, and are specifically designed according to the circumstances, without limitation, and are not limited to the four.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.

Claims

1. A cooling liquid evaporator is characterized by comprising a shell, a plurality of fan-ring-shaped heat exchange tubes and an inner heat exchange tube, wherein the two ends of the fan-ring-shaped heat exchange tubes are arranged in tube plates at the two ends of the shell and can be spliced into a circular ring structure; a first secondary refrigerant inlet connecting pipe and a first secondary refrigerant outlet connecting pipe are arranged on the shell, sealing heads are respectively arranged on the outer sides of the tube plates, a refrigerant liquid inlet connecting pipe, a refrigerant gas outlet connecting pipe and a second secondary refrigerant inlet connecting pipe are arranged on one sealing head, a bleed air connecting pipe and a second secondary refrigerant outlet connecting pipe are arranged on the other sealing head, and the inner ends of the second secondary refrigerant inlet connecting pipe and the second secondary refrigerant outlet connecting pipe are arranged in the holes of the corresponding tube plates; the end socket provided with the refrigerant liquid inlet connecting pipe and a cavity formed by the corresponding end plate are internally provided with an annular partition plate to divide the interior of the end socket into two cavities which are separated from the inside and the outside, the refrigerant liquid inlet connecting pipe is communicated with the cavity on the inside so that the refrigerant liquid entering the cavity on the inside enters the inner heat exchange pipe, is deflected from the end socket at the other end, returns to the cavity on the outside through the fan-ring-shaped heat exchange pipe and is discharged through the refrigerant gas outlet connecting pipe.

2. The cooling liquid evaporator according to claim 1 wherein the second coolant inlet nozzle is disposed opposite to the second coolant outlet nozzle, the second coolant inlet nozzle passing through the cavity of the inner side, and a connecting axis of the second coolant inlet nozzle to the second coolant outlet nozzle being located between the inner heat exchange tubes and the fan-ring shaped heat exchange tubes; the first secondary refrigerant inlet connecting pipe and the first secondary refrigerant outlet connecting pipe are respectively arranged at the top and the bottom of the shell and are respectively and correspondingly arranged close to one tube plate.

3. The cooling liquid evaporator as claimed in claim 1, wherein the refrigerant gas outlet connection pipe is located at the top of the head and welded to the corresponding orifice; the refrigerant liquid inlet connecting pipe is welded with the central orifice of the seal head; the air-entraining connecting pipe is positioned at the top of the end socket and is welded with the corresponding orifice.

4. The cooling liquid evaporator as claimed in claim 1, wherein the edges of the headers are welded to corresponding connected tube sheets.

5. The cooling liquid evaporator of claim 1, wherein the first coolant inlet tap and the second coolant inlet tap are connected to an outlet of a coolant cycle and the first coolant outlet tap and the second coolant outlet tap are connected to an inlet of the coolant cycle.

6. The cooling liquid evaporator as claimed in claim 1, wherein the refrigerant liquid inlet connection is connected to the throttling pressure reduction element outlet connection, and the bleed air connection is connected in parallel to the outlet of the refrigerant gas outlet connection and then to the inlet of the refrigeration compressor.