CN203881003U - Liquid spraying type heat exchanger in refrigeration system - Google Patents

Abstract

The utility model discloses a liquid-spraying heat exchanger in a refrigeration system. The liquid-spraying heat exchanger comprises a casing composed of an inner tube and an outer tube arranged coaxially. Block the heads of the inner tube and the outer tube; on the wall of the outer tube close to the ends of the ends, one end is provided with a cooled medium input port, and the other end is provided with a cooled medium output port ; On the head at one end of the casing, there is a cooling medium outlet that is only connected to the inner tube; on the head at the other end of the casing, there is a central hole, and a section of the pipe wall has a number of holes. The hollow tube of the hole is sealed and inserted into the inner tube through the central hole, the end of the hollow tube inserted into the inner tube is provided with a hollow tube head, and the end of the hollow tube located outside the casing There is a cooling medium input port. The utility model has high heat transfer efficiency and small volume.

Description

A liquid injection heat exchanger in a refrigeration system

technical field

The utility model relates to a heat exchanger, in particular to a liquid spray heat exchanger in a refrigeration system.

Background technique

At present, heat exchangers are common equipment in chemical industry, petroleum, power, food and many other industrial sectors, and play an important role in production. In chemical production, heat exchangers can be used as heaters, coolers, condensers, evaporators and reboilers, etc., and are more widely used. There are many types of heat exchangers, but according to the principle and method of heat exchange between cold and hot fluids, they can basically be divided into three categories: partition type, hybrid type and heat storage type. Among the three types of heat exchangers, partition wall heat exchangers are the most widely used. The characteristic of the partition wall heat exchanger is that the cold and hot fluids are separated by a solid wall (tube or plate), do not mix, and exchange heat through the partition wall.

The spray heat exchanger is a kind of partition heat exchanger. In this heat exchanger, the heat exchange tubes are fixed on the steel frame in rows, the hot fluid flows in the tubes, and the cooling water is evenly sprayed from the spray device above. Next, it is also called spray cooler. The outside of the tube of the spray heat exchanger is a layer of liquid film with a high degree of turbulence, and the heat transfer coefficient outside the tube is much larger than that of the submerged heat exchanger. In addition, this kind of heat exchanger is mostly placed in the place where the air circulates, and the evaporation of the cooling water also takes away part of the heat, which can reduce the temperature of the cooling water and increase the driving force of heat transfer. Therefore, compared with the immersion type, the heat transfer effect of the spray heat exchanger is greatly improved. Its advantages are simple structure, easy manufacture, and low price; the main disadvantages are low heat transfer efficiency and large floor space.

Contents of the invention

In order to solve the technical problems in the known technology, the utility model provides a liquid-spraying heat exchanger in a refrigeration system that realizes counterflow, high heat transfer efficiency and small volume.

The technical solution adopted by the utility model to solve the technical problems existing in the known technology is: a liquid spray heat exchanger in a refrigeration system, the liquid spray heat exchanger includes an inner tube and an outer tube arranged coaxially The two ends of the casing are provided with heads that block the inner tube and the outer tube at the same time; on the wall of the outer tube that is close to the ends of the ends, one end is provided with a The cooling medium input port is provided with the cooling medium output port at the other end; the cooling medium output port only communicated with the inner tube is provided on the head at one end of the casing; the head at the other end of the casing There is a central hole on the top, and a hollow tube with several through holes on the tube wall is sealed and inserted into the inner tube through the central hole. The end of the hollow tube inserted into the inner tube is provided with a hollow tube head , the hollow tube is provided with a cooling medium inlet at one end outside the casing.

The utility model can also adopt the following technical solutions:

Both ends of the sleeve are provided with welded heads that block the inner tube and the outer tube.

The hollow tube is provided with a hollow tube welding head at one end inserted into the casing.

A plurality of through holes are evenly distributed on the tube wall of the hollow tube.

The inner and outer walls of the inner tube are provided with tooth-shaped protrusions.

A spray head is fixedly connected to the through hole of the tube wall of the hollow tube.

The utility model has the advantages and positive effects as follows: the liquid spray heat exchanger includes a coaxially arranged casing composed of an inner tube and an outer tube, and the outer surface of the casing is close to the ends of the two ends. There are cooling medium input ports and cooling medium output ports respectively, so that the cooling medium flows between the inner tube and the outer tube; a hollow tube with several small holes on the tube wall is inserted into the inner tube, through the input hollow tube The cooling medium is input into the tube, and the cooling medium is sprayed on the inner tube wall, and the heat exchange is carried out with the cooled medium through the inner tube wall, thereby reducing the temperature of the cooled medium. Cooling medium output port; the cooling medium is output through the cooling medium output port after heat exchange, and the cooled medium is output through the cooled medium output port after heat exchange. The cooling medium and the cooled medium are outside the body of the liquid spray heat exchanger It forms a cycle and is used in combination with other equipment in the refrigeration system to improve the heat exchange efficiency and is small in size.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is a schematic diagram of the structure of the utility model connected with other refrigeration equipment in the refrigeration system.

In the figure: 1. Refrigeration compressor; 2. Refrigeration compressor exhaust pipe; 3. Refrigeration compressor suction pipe; 4. Liquid spray heat exchanger; 5. Condenser liquid outlet pipe; 6. Condenser suction Tube; 7. Condenser; 8. Solenoid valve; 10. Head; 11. Cooled medium input port; 12. Outer tube; 13. Inner tube; 14. Cooling medium output port; 15. Cooling medium input port; 16 1. Hollow tube; 17. Nozzle fixed on the through hole; 18. Cooled medium outlet.

Detailed ways

In order to further understand the invention content, characteristics and effects of the present utility model, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

Please refer to Figures 1 to 2, a liquid spray heat exchanger in a refrigeration system, the liquid spray heat exchanger includes a sleeve composed of an inner tube 13 and an outer tube 12 coaxially arranged, the sleeve Two ends are provided with the sealing head 10 that blocks described inner tube 13 and described outer tube 12 simultaneously; One end on the left side of the tube wall is provided with a cooled medium input port 11, and the other end on the right side of the tube wall of the outer tube 12 is provided with a cooled medium output port 18; A cooling medium output port 14 communicating with the inner tube 13; a central hole is opened on the head at the other end of the casing, and a hollow tube 16 with several through holes opened on a section of the tube wall is sealed and inserted through the central hole In the inner tube 13, the hollow tube 16 is provided with a hollow tube head at one end inserted into the inner tube 13, and the hollow tube 16 is provided with a cooling medium input port 15 at one end outside the casing. .

In this way, the cooling medium and the cooled medium can form a circulation outside the body of the liquid spray heat exchanger, and be used in combination with other equipment in the refrigeration system. The cooling medium and the cooled medium can exchange heat through the tube wall of the inner tube 13 , the cooling medium is liquid before heat exchange, and the cooling medium is gaseous after heat exchange.

Specifically, the refrigeration system applicable to the utility model may include a refrigeration compressor 1 and a condenser 7, and the refrigeration compressor 1 may be provided with a refrigeration compressor suction pipe 3 and a refrigeration compressor exhaust pipe 2, and the condenser The condenser 7 can be provided with a condenser suction pipe 6 and a condenser liquid outlet pipe 5, the cooling medium input port 11 can be connected with the refrigeration compressor exhaust pipe 2, and the cooling medium output port 14 can be connected with the The refrigeration compressor suction pipe 3 is connected; the cooling medium input port 15 can be connected with the condenser liquid outlet pipe 5, and the cooled medium output port 18 can be connected with the condenser suction pipe 6. A solenoid valve 8 may be provided between the cooling medium input port 15 and the condenser liquid outlet pipe 5 to control the flow and pressure of the condenser liquid outlet.

Further, the two ends of the casing can be provided with welding heads to seal the inner pipe 13 and the outer pipe 12 .

Further, the hollow tube 16 may be provided with a hollow tube welding head at one end inserted into the casing.

Further, in order to increase the heat dissipation area, tooth-shaped protrusions may be provided on the inner and outer walls of the inner tube 13 .

Further, in order to make the sprayed liquid spray evenly, several through holes can be evenly distributed on the tube wall of the hollow tube 16 .

Further, in order to prevent the sprayed liquid from splitting, a spray head 17 may be fixedly connected to the through hole of the tube wall of the hollow tube 16 .

Working principle of the utility model:

The liquid-spray heat exchanger includes a coaxial sleeve composed of an inner tube 13 and an outer tube 12, and through the tube wall of the outer tube 12 that is close to the two ends of the head 10, the cooling medium is respectively opened. The input port 11 and the output port 18 of the cooled medium; make the cooled medium flow between the inner tube 13 and the outer tube 12; insert a section of the hollow tube 16 with several small holes on the tube wall into the inner tube 13, and pass the cooling medium The input port 15, the liquid cooling medium is input into the hollow tube 16, and there are several small holes on the wall of the hollow tube 16, the liquid cooling medium with a certain pressure is sprayed out from the small holes, and the liquid cooling medium is sprayed on the inner tube 13 On the wall, heat exchange is carried out with the cooled medium through the inner tube 13, thereby reducing the temperature of the cooled medium, and the liquid cooling medium becomes gaseous after absorbing heat, and the cooling medium is output on the head 10 at one end of the casing Port 14; the cooling medium is output through the cooling medium output port 14 after heat exchange, and the cooled medium is output through the cooled medium output port 18 after heat exchange. The cooling medium and the cooled medium can be in the liquid spray heat exchanger 4 The circulation is formed outside the body, and the combination with other equipment in the refrigeration system improves the heat exchange efficiency, and the volume is small. Such as, refrigeration system can comprise refrigeration compressor 1 and condenser 7, and described refrigeration compressor 1 can be provided with refrigeration compressor suction pipe 3 and refrigeration compressor discharge pipe 2, and described condenser 7 can be provided with condenser The suction pipe 6 and the condenser liquid outlet pipe 5, the cooling medium input port 11 can be connected with the refrigeration compressor discharge pipe 2, and the cooling medium output port 14 can be connected with the refrigeration compressor suction pipe 3 connections; the cooling medium input port 15 can be connected to the condenser liquid outlet pipe 5, and the cooled medium output port 18 can be connected to the condenser suction pipe 6. In this way, the hollow tube 16 inputs the liquid refrigerant from the liquid outlet pipe 5 of the condenser 7 through the cooling medium input port 14, and sprays the through hole of the hollow tube 16 onto the wall of the inner tube 13 of the bushing, The flow and pressure of the liquid refrigerant can be controlled through the valve, and the heat of the cooled medium is absorbed through the wall of the inner tube 13, and the refrigerant gas formed after spraying is output through the cooling medium output port 14, and is used in the refrigeration system The refrigeration compressor suction pipe 3 of the refrigeration compressor 1 is input into the refrigeration compressor 1; the high-heat refrigerant output by the refrigeration compressor discharge pipe 2 of the refrigeration compressor 1 is input into the refrigeration compressor through the cooling medium input port 11. between the inner tube 13 and the outer tube 12, and flow in it, and exchange heat with the liquid refrigerant from the condenser 7 through the tube wall of the inner tube 13, and the inner tube 13 and the cooled refrigerant after the heat exchange The refrigerant between the outer tubes 12 is input into the condenser 7 for condensation through the outlet 18 of the cooled medium and the suction pipe 6 of the condenser. The high-temperature and high-pressure refrigerant gas discharged from the exhaust pipe 2 of the refrigeration compressor of the machine 1 is exothermic, thereby reducing the temperature, and then enters the condenser 7 for further condensation, and sets protrusions through the inner and outer walls of the inner pipe 13 to improve the efficiency of the exchange rate. thermal efficiency, and small size.

Claims (6)

1. the liquid-spraying type heat exchanger in refrigeration system, is characterized in that, this liquid-spraying type heat exchanger comprises the sleeve pipe consisting of the inner and outer tubes that coaxially arrange, and described sleeve pipe two ends are provided with the end socket of inner tube and described outer tube described in simultaneously shutoff; On the tube wall of described outer tube, approach the position of two ends end socket, one end is provided with the medium input port that is cooled, and the other end is provided with the medium delivery outlet that is cooled; On the end socket of one end of described sleeve pipe, be provided with the cooling medium delivery outlet being only communicated with described inner tube; On the other end end socket of described sleeve pipe, have centre bore, the hollow pipe that has some through holes on one section of tube wall inserts in described inner tube by described centre bore sealing, described hollow pipe one end in inserting described inner tube is provided with hollow pipe end socket, and described hollow pipe is provided with cooling medium input port in the one end that is positioned at described jacket exterior.

2. the liquid-spraying type heat exchanger in refrigeration system according to claim 1, is characterized in that, described sleeve pipe two ends are provided with the welding end socket of inner tube and described outer tube described in shutoff.

3. the liquid-spraying type heat exchanger in refrigeration system according to claim 1, is characterized in that, described hollow pipe is provided with hollow pipe welding end socket in the one end of inserting described inside pipe casing.

4. the liquid-spraying type heat exchanger in refrigeration system according to claim 1, is characterized in that, uniform some through holes on the tube wall of described hollow pipe.

5. the liquid-spraying type heat exchanger in refrigeration system according to claim 1, is characterized in that, the inside and outside wall of described inner tube is provided with profile of tooth projection.

6. the liquid-spraying type heat exchanger in refrigeration system according to claim 1, is characterized in that, on the through hole of described hollow pipe tube wall, is connected with shower nozzle.