Flash evaporation type heat regenerator for air-supplementing enthalpy-increasing heat pump system

Abstract

The utility model discloses a flash evaporation type heat regenerator for an air-supplementing enthalpy-increasing heat pump system, relates to the technical field of refrigeration and air conditioners, and aims to solve the problem that the energy efficiency of a refrigeration system is affected due to the fact that an existing gas-liquid separator plays a role in gas-liquid separation and the resistance of gas return is increased at the same time. The symmetrical side surfaces of the heat regenerator cylinder are each fixedly connected with a pipe base, the inner side of a port of each pipe base is fixedly connected with a base plate, a plurality of heat exchange pipes are fixedly connected between the two base plates, the two ends of each heat exchange pipe communicate with the outer space of the corresponding base plate, and a filter screen is arranged at the upper end of the interior of the heat regenerator cylinder; grilles are arranged on the upper side and the lower side of the filter screen, and mounting holes are formed in the side surface of the heat regenerator cylinder. The effects that efficient gas-liquid separation operation can be achieved, gas supplementing and enthalpy increasing can be conducted on the compressor, the heating and refrigerating efficiency of the heat pump system is improved, and energy conservation and environment protection are achieved are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of refrigeration and air conditioning, in particular to a flash heat regenerator for an air-supplementing enthalpy-increasing heat pump system. Background Art

[0002] As society's requirements for energy conservation and environmental protection become increasingly higher, how to improve the energy efficiency of air-conditioning and refrigeration equipment has become particularly important. At present, in the field of refrigeration and air-conditioning, refrigeration units such as large central air-conditioning and refrigeration and freezing places generally use screw or centrifugal chillers, which use screw or centrifugal compressors inside. The compressor must prevent return air from carrying liquid during operation. If the refrigerant liquid enters the screw compressor, the compressor rotor oil film will be destroyed, and the rotor lubrication will fail, resulting in dry grinding or even locking of the rotor. If the refrigerant liquid enters the centrifugal compressor, it will cause the compressor blades to wear, especially the magnetic levitation compressors currently used. Return air carrying liquid will cause great harm to the compressor and cause damage to the compressor. Generally, in order to prevent the compressor from carrying liquid in the return air, a gas-liquid separator will be set before the compressor return air port. The refrigerant liquid and gas are separated in the gas-liquid separator to solve the problem of return air carrying liquid.

[0003] The existing gas-liquid separator has achieved the effect of gas-liquid separation, but at the same time it also increases the resistance of return air, thereby affecting the energy efficiency of the refrigeration system. Utility Model Content

[0004] The utility model aims to provide a flash heat regenerator for an air-inflation and enthalpy-increasing heat pump system, which can realize efficient gas-liquid separation operation, and can inflate air and increase enthalpy for the compressor, thereby improving the heating and cooling efficiency of the heat pump system and realizing energy saving and environmental protection.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A flash regenerator for an air-increasing enthalpy-increasing heat pump system comprises a regenerator cylinder, a tube seat is fixedly connected to the symmetrical side surface of the regenerator cylinder, a base plate is fixedly connected to the inner side of the port of the tube seat, a plurality of heat exchange tubes are fixedly connected between the two base plates, and the two ends of the heat exchange tubes are respectively communicated with the external space of the base plates, a filter screen is arranged at the inner upper end of the regenerator cylinder, grilles are arranged at the upper and lower sides of the filter screen, a mounting hole is arranged on the side surface of the regenerator cylinder, and an air-increasing port pipe fitting is welded and fixed at the mounting hole, one end of the air-increasing port pipe fitting extends to the space above the filter screen inside the regenerator cylinder, a refrigerant inlet pipe fitting is fixedly connected to the upper end of the side surface of the regenerator cylinder, and two refrigerant outlet pipe fittings are fixedly connected to the lower end of the side surface of the regenerator cylinder.

[0007] By adopting the above technical solution, efficient heat exchange operation can be achieved, gas-liquid separation operation can be effectively realized, and the air inlet pipe can also be used to increase the intake enthalpy value of the external compressor, and the filter can be used to perform gas-liquid separation operation.

[0008] Furthermore, a head is fixedly connected to the upper end of the heat regenerator cylinder.

[0009] By adopting the above technical solution, the stable operation of the entire heat regenerator is ensured.

[0010] Furthermore, a first end cover assembly and a second end cover assembly are respectively installed on one end of the two tube seats.

[0011] By adopting the above technical solution, the low-temperature liquid can be stably improved to pass through the interior of the regenerator cylinder.

[0012] Furthermore, a tube sheet is fixedly connected to the port of the tube seat, and end cover flanges are fixedly connected to the ports of the first end cover assembly and the second end cover assembly, and the end cover flanges are fixedly connected to the tube sheet by connecting bolts.

[0013] By adopting the above technical solution, the first end cover assembly and the second end cover assembly can be conveniently disassembled and assembled with the pipe seat.

[0014] Furthermore, a sealing gasket is provided between the end cover flange and the tube sheet.

[0015] By adopting the above technical solution, the sealing performance between the end cover flange and the tube sheet can be effectively improved.

[0016] Furthermore, a support plate is fixedly connected to the lower end of the heat regenerator cylinder.

[0017] By adopting the above technical solution, the support plate can be used to improve the stability of the entire regenerator.

[0018] In summary, the beneficial technical effects of the utility model are:

[0019] The utility model allows low-temperature liquid to pass through the interior of the heat exchange tube, and at the same time allows gas to pass through the interior of the regenerator cylinder. In this process, the gas medium in the regenerator cylinder is cooled by directly evaporating the liquid in the heat exchange tube until the condensable substance in the gas medium condenses into supercooled liquid. Compared with the indirect refrigeration method, the intermediate loss is greatly reduced, the condensation efficiency is high, and the energy consumption is greatly reduced. Since the refrigerant inlet pipe is horizontally inlet, and the refrigerant inlet pipe is located above the heat exchange tube, and the flow rate of the gas entering the regenerator cylinder is reduced, the gas can be prevented from directly impacting the heat exchange tube, effectively improving the overall working stability, and at the same time ensuring that the gas is evenly distributed in the regenerator cylinder. In addition, since the air supply port pipe is fixedly connected to the side surface of the regenerator cylinder, a filter is arranged inside the regenerator cylinder, the filter can be used to perform gas-liquid separation operation, thereby increasing the gas output of the regenerator, thereby increasing the intake enthalpy value of the external compressor, increasing the compression ratio of the compressor, and improving the cooling and heating effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is the internal structure diagram of the utility model;

[0021] Figure 2 It is a top view of the utility model.

[0022] In the figure: 1. first end cover assembly; 2. end cover flange; 3. head; 4. filter screen; 5. connecting bolts; 6. sealing gasket; 7. regenerator cylinder; 8. support plate; 9. heat exchange tube; 10. refrigerant inlet pipe fitting; 11. refrigerant outlet pipe fitting; 12. air supply pipe fitting; 13. second end cover assembly; 14. tube sheet; 15. tube seat. DETAILED DESCRIPTION

[0023] The method of the utility model is further described in detail below in conjunction with the accompanying drawings.

[0024] See attached Figure 1 , Attachment Figure 2A flash regenerator for an air-supplementing enthalpy-increasing heat pump system comprises a regenerator cylinder 7, a tube seat 15 is fixedly connected to the symmetrical side surfaces of the regenerator cylinder 7, a base plate is fixedly connected to the inner side of the port of the tube seat 15, a plurality of heat exchange tubes 9 are fixedly connected between the two base plates, and the two ends of the heat exchange tubes 9 are respectively connected to the external space of the base plate, a filter screen 4 is arranged at the upper end of the inner part of the regenerator cylinder 7, grilles are arranged at the upper and lower sides of the filter screen 4, and mounting holes are arranged on the side surface of the regenerator cylinder 7, and An air supply pipe 12 is welded and fixed at the mounting hole, one end of which extends to the space above the filter screen 4 inside the regenerator cylinder 7. A refrigerant inlet pipe 10 is fixedly connected to the upper end of the side surface of the regenerator cylinder 7, and two refrigerant outlet pipes 11 are fixedly connected to the lower end of the side surface of the regenerator cylinder 7. A sealing head 3 is fixedly connected to the upper end of the regenerator cylinder 7, and a support plate 8 is fixedly connected to the lower end of the regenerator cylinder 7, which allows the low-temperature liquid to pass through the interior of the heat exchange tube 9 and at the same time The gas passes through the interior of the regenerator cylinder 7. During this process, the gas medium inside the regenerator cylinder 7 is cooled by directly evaporating the liquid inside the heat exchange tube 9 until the condensable substance in the gas medium condenses into a supercooled liquid. Compared with the indirect refrigeration method, the intermediate loss is greatly reduced, the condensation efficiency is high, and the energy consumption is greatly reduced. Since the refrigerant inlet pipe 10 intakes air horizontally and the refrigerant inlet pipe 10 is located above the heat exchange tube 9, and the flow rate of the gas entering the regenerator cylinder 7 is reduced, the gas can be prevented from directly impacting the heat exchange tube 9, effectively improving the overall working stability, and at the same time ensuring that the gas is evenly distributed inside the regenerator cylinder 7. Since the air supply port pipe 12 is fixedly connected to the side surface of the regenerator cylinder 7 and the filter 4 is arranged inside the regenerator cylinder 7, the filter 4 can be used to perform gas-liquid separation operations, thereby increasing the gas output of the regenerator, thereby increasing the intake enthalpy value of the external compressor, increasing the compression ratio of the compressor, and improving the cooling and heating effects.

[0025] Reference Figure 1 The first end cover assembly 1 and the second end cover assembly 13 are respectively installed at one end of the two tube seats 15, and the tube sheet 14 is fixedly connected to the port of the tube seat 15. The end cover flange 2 is fixedly connected to the port of the first end cover assembly 1 and the second end cover assembly 13. The end cover flange 2 and the tube sheet 14 are fixedly connected by connecting bolts 5. A sealing gasket 6 is arranged between the end cover flange 2 and the tube sheet 14, wherein the sealing gasket 6 can be used to improve the sealing between the end cover flange 2 and the tube sheet 14. At the same time, the first end cover assembly 1 and the second end cover assembly 13 can be fixedly installed at the port of the regenerator cylinder 7 by using the connecting bolts 5, and the whole structure can realize convenient disassembly and assembly operations.

[0026] Working principle: When in use, first install the regenerator at the designated position. When working, the low-temperature liquid passes through the interior of the heat exchange tube 9, and the gas to be treated enters the interior of the regenerator cylinder 7 from the refrigerant inlet pipe 10, and then is discharged from the refrigerant outlet pipe 11. In this process, the gas medium inside the regenerator cylinder 7 is cooled by direct evaporation of the liquid inside the heat exchange tube 9 until the condensable substance in the gas medium condenses into a supercooled liquid. Compared with the indirect refrigeration method, the intermediate loss is greatly reduced, the condensation efficiency is high, and the energy consumption is greatly reduced. Since the refrigerant inlet pipe 10 intakes air horizontally and the refrigerant inlet pipe 10 is located The heat exchange tube 9 is placed above the heat exchange tube 9, and the flow rate of the gas entering the regenerator cylinder 7 is reduced, thereby preventing the gas from directly impacting the heat exchange tube 9, effectively improving the overall working stability, and ensuring that the gas is evenly distributed inside the regenerator cylinder 7. Since the air supply port pipe fitting 12 is fixedly connected to the side surface of the regenerator cylinder 7 and the filter screen 4 is arranged inside the regenerator cylinder 7, part of the gas will pass through the filter screen 4 and be discharged from the air supply port pipe fitting 12. This can utilize the filter screen 4 to perform gas-liquid separation operation, thereby increasing the gas output of the regenerator, thereby increasing the intake enthalpy value of the external compressor, increasing the compression ratio of the compressor, and improving the cooling and heating effects.

[0027] The embodiments of this specific implementation method are all preferred embodiments of the utility model, and are not intended to limit the protection scope of the utility model. Therefore, all equivalent changes made based on the structure, shape, and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A flash regenerator for an air-compensating enthalpy-increasing heat pump system, comprising a regenerator cylinder (7), characterized in that: A tube seat (15) is fixedly connected to the symmetrical side surfaces of the heat exchanger cylinder (7), a base plate is fixedly connected to the inner side of the port of the tube seat (15), a plurality of heat exchange tubes (9) are fixedly connected between the two base plates, and the two ends of the heat exchange tubes (9) are respectively connected to the external space of the base plates, a filter screen (4) is arranged at the upper end of the interior of the heat exchanger cylinder (7), and grilles are arranged at the upper and lower sides of the filter screen (4), a mounting hole is arranged on the side surface of the heat exchanger cylinder (7), and an air supply port pipe fitting (12) is welded and fixed at the mounting hole, and one end of the air supply port pipe fitting (12) extends to the space above the filter screen (4) inside the heat exchanger cylinder (7), a refrigerant inlet pipe fitting (10) is fixedly connected to the upper end of the side surface of the heat exchanger cylinder (7), and two refrigerant outlet pipe fittings (11) are fixedly connected to the lower end of the side surface of the heat exchanger cylinder (7).

2. The flash regenerator for the air-compensating enthalpy-increasing heat pump system according to claim 1, characterized in that: The upper end of the regenerator cylinder (7) is fixedly connected to a head (3).

3. The flash regenerator for the air-compensating enthalpy-increasing heat pump system according to claim 1, characterized in that: A first end cover assembly (1) and a second end cover assembly (13) are respectively installed at one end of the two tube seats (15).

4. The flash regenerator for the air-compensating enthalpy-increasing heat pump system according to claim 3, characterized in that: The tube seat (15) is fixedly connected to a tube sheet (14) at its port, the first end cover assembly (1) and the second end cover assembly (13) are both fixedly connected to end cover flanges (2) at their ports, and the end cover flanges (2) and the tube sheet (14) are fixedly connected via connecting bolts (5).

5. The flash regenerator for the air-compensating enthalpy-increasing heat pump system according to claim 4, characterized in that: A sealing gasket (6) is provided between the end cover flange (2) and the tube sheet (14).

6. The flash regenerator for an air-supplementing enthalpy-increasing heat pump system according to claim 1, characterized in that: A support plate (8) is fixedly connected to the lower end of the regenerator cylinder (7).

Images