CN210425379U

CN210425379U - Integrated heat return gas-liquid separator and refrigeration system for carbon dioxide refrigerant air conditioner

Info

Publication number: CN210425379U
Application number: CN201921235892.8U
Authority: CN
Inventors: 程显耀; 陈广泰; 庞学博; 白刚; 常博浩; 魏子淇
Original assignee: CRRC Dalian Institute Co Ltd
Current assignee: CRRC Dalian Institute Co Ltd
Priority date: 2019-08-01
Filing date: 2019-08-01
Publication date: 2020-04-28
Anticipated expiration: 2029-08-01

Abstract

The utility model discloses an integrate back hot gas-liquid separator and refrigerating system for carbon dioxide refrigerant air conditioner, gas-liquid separator includes the casing, be equipped with intake pipe and blast pipe on the casing, the intake pipe sets up in the lower part of casing, still be equipped with back heat pipe in the casing, the blast pipe includes the inside pipeline section of outside pipe section and the U type structure that stretches out from casing upper portion, the port of inside pipeline section is located the upper portion of the inner space of casing, back heat pipe includes back heat pipe inlet manifold, back heat pipe give vent to anger the house steward and connect in parallel in back heat pipe inlet manifold and the back heat pipe give vent to anger the house steward between two more than branch pipe, back heat pipe inlet manifold stretches out from the upper portion of casing, back heat pipe outlet manifold stretches out from the lower. A integrate back hot gas liquid separator heat transfer high-efficient for carbon dioxide refrigerant air conditioner, the assembly is simple, low cost has the guard action to refrigerating system's compressor.

Description

Integrated heat return gas-liquid separator and refrigeration system for carbon dioxide refrigerant air conditioner

Technical Field

The utility model relates to an air conditioning system technical field, concretely relates to an integrate back vapour and liquid separator and refrigerating system for carbon dioxide refrigerant air conditioner.

Background

At present, CO₂Refrigerant is regarded as being environmentally friendly with ozone depletion potential of 0 and global warming potential of 1. To make CO₂High performance of refrigerant air conditioner, CO₂The heat regenerator is arranged in the circulating system, so that the outlet refrigerant of the gas cooler exchanges heat with the outlet refrigerant of the evaporator, and CO can be obviously promoted₂The energy efficiency ratio of the refrigerant air conditioner and the energy efficiency ratio of the heat regenerator to a conventional refrigerant system are not obviously improved. The independent arrangement of the heat regenerator and the gas-liquid separator can lead to the redundant system, increase the number of welding openings and increase the use risk of the system.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to the proposition of above problem, and research and design one kind is used for carbon dioxide refrigerant air conditioner to integrate back vapour and liquid separator and refrigerating system. The utility model discloses a technical means as follows:

the utility model provides an integrate back hot gas-liquid separator for carbon dioxide refrigerant air conditioner, includes the casing, be equipped with intake pipe and blast pipe on the casing, the intake pipe sets up in the lower part of casing, still be equipped with back heat pipe in the casing, the blast pipe includes the inside pipeline section of outside pipe section and U type structure that stretches out from casing upper portion, the port of inside pipeline section is located the upper portion of the inner space of casing, back heat pipe includes back heat pipe inlet manifold, back heat pipe outlet manifold and connect in parallel in back heat pipe inlet manifold and the back heat pipe outlet manifold between more than two branch pipes, back heat pipe inlet manifold stretches out from the upper portion of casing, back heat pipe outlet manifold stretches out from the lower part of casing.

Furthermore, the regenerative tube comprises more than six branch tubes which are arranged around a regenerative tube air inlet main pipe and a regenerative tube air outlet main pipe.

Furthermore, two end parts of the branch pipes are bent towards the same side, the upper ends of the branch pipes are communicated with the inlet main pipe of the regenerative pipe, the lower ends of the branch pipes are communicated with the outlet main pipe of the regenerative pipe, and angles between the adjacent branch pipes are the same.

Further, both ends of the branch pipe are bent by 90 degrees.

Furthermore, the branch pipe is a copper pipe with the pipe diameter of 5mm and the wall thickness of 1mm,

furthermore, the upper part of one side of the inner pipe section connected with the outer pipe section is provided with a balance hole, and the bottom of the inner pipe section is provided with an oil return hole.

Further, the port of the inner pipe section faces upwards, the distance between the port of the inner pipe section and the top of the shell is 12-16mm, and the diameter of the oil return hole is 2 mm.

Further, the shell comprises a shell body and an end cover arranged at the top of the shell body, wherein the end cover is of an arc-shaped structure.

Further, the bottom of the shell is provided with a liquid level sensor.

The utility model provides a refrigerating system for carbon dioxide refrigerant air conditioner, includes compressor, gas cooler, expansion valve and evaporimeter, still includes a hot gas liquid separator returns for integrating of carbon dioxide refrigerant air conditioner, the export of compressor links to each other with gas cooler's entry, gas cooler's export links to each other with backheat pipe inlet manifold, backheat pipe outlet manifold links to each other with the entry of expansion valve, the export of expansion valve links to each other with the entry of evaporimeter, the export of evaporimeter with the intake pipe links to each other, the port of outside pipeline section links to each other with the entry of compressor.

Compared with the prior art, an integration return hot gas liquid separator heat transfer for carbon dioxide refrigerant air conditioner high-efficient, the assembly is simple, low cost has the guard action to refrigerating system's compressor.

Drawings

Fig. 1 is a schematic structural view of an integrated heat recovery gas-liquid separator for a carbon dioxide refrigerant air conditioner according to an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a refrigeration system for a carbon dioxide refrigerant air conditioner according to an embodiment of the present invention.

Detailed Description

As shown in fig. 1, an integrated hot gas-liquid separator for a carbon dioxide refrigerant air conditioner comprises a shell 7, wherein an air inlet pipe 1 and an air outlet pipe 2 are arranged on the shell 7, the air inlet pipe 1 is arranged at the lower part of the shell 7 and is positioned at the side surface of the sub-shell 7 close to the bottom, so that the flow rate of mixed gas with liquid can be reduced under the action of liquid stored in a separation container after the mixed gas with liquid enters the shell 7, and the liquid can be rapidly separated. The port that is located the casing outside of intake pipe 1 is intake pipe air inlet 10, still be equipped with backheat 5 in the casing 7, exhaust pipe 2 includes the outside pipe section 21 and the inside pipe section 22 of U type structure that stretch out from casing 7 upper portion, the port of inside pipe section is located the upper portion of the inner space of casing, as exhaust pipe air inlet 9, backheat 5 includes backheat air inlet manifold 12, backheat air outlet manifold 11 and parallelly connected in backheat air inlet manifold 12 and backheat more than two branch pipes 19 between the air outlet manifold 11, backheat air inlet manifold 12 stretches out from the upper portion of casing 7, backheat air outlet manifold 11 stretches out from the lower part of casing 7.

Regenerator tube 5 includes more than six branch pipes 19 around regenerator tube inlet manifold 12 and regenerator tube outlet manifold 11 setting, and this embodiment is equipped with 8 branch pipes 19, two tip of branch pipe 19 are buckled to same one side, the upper end and regenerator tube inlet manifold 12 intercommunication of branch pipe 19, the lower extreme and the regenerator tube outlet manifold 11 intercommunication of branch pipe 19, the angle between the adjacent branch pipe is the same, that is to say, 19 equipartitions of a plurality of branch pipes form the lantern support form around regenerator tube inlet manifold 12 and regenerator tube outlet manifold 11. Preferably, both ends of the branch pipe 19 are bent at 90 degrees. The branch pipe 19 is a copper pipe with the pipe diameter of 5mm and the wall thickness of 1 mm. Due to CO₂The pressure of the system is higher, the wall thickness of the copper pipe with a large pipe diameter is thicker, and the pressure resistance of the copper pipe with a small pipe diameter is higher, so that the wall thickness can be thinner. The wall thickness is thin, so that the thermal resistance is reduced, the heat exchange coefficient is increased, and the convection heat exchange coefficient of a small pipe diameter is also improved. The multiple small-pipe-diameter copper pipe structures can increase the heat exchange area, and the main bodies of the branch pipes are straight pipes, so that the flow loss of a refrigerant can be reduced without using a spiral structure. The gas flow direction of the regenerative tube 5 is the reverse flow direction of the gas flow direction in the shell 7, and the reverse flow arrangement can increase the heat exchange amount.

The upper portion of the one side that inside pipeline section 22 and outside pipeline section 21 link to each other is equipped with balance hole 4, that is to say, balance hole 4 is close to outside pipeline section 21 and sets up, the bottom of inside pipeline section 22 is equipped with oil gallery 3, the diameter of oil gallery 3 is 2mm, and the refrigerant that gets into blast pipe 2 can vaporize in the twinkling of an eye through oil gallery 3 of this diameter, and the too big liquid refrigerant that can make of aperture can not vaporize completely, and the aperture undersize can make the oil return untimely. The port of the inner pipe section 22 faces upwards, the distance between the port of the inner pipe section 22 and the top of the shell is 12-16mm, and the higher position of the exhaust pipe air inlet 9 can prevent liquid refrigerant from entering the exhaust pipe air inlet 9. Casing 7 includes the casing main part and sets up in end cover 6 at casing main part top, end cover 6 is the arc structure, specifically can be forms such as spherical lid, butterfly lid, ellipsoid lid, hyperboloid lid for can gather and flow to the edge of end cover 6 after the liquid drop that mix with in the updraft in casing 7 to end cover 6, from the edge drippage of end cover 6, prevent that the liquid drop from getting into outlet duct air inlet 9, effectively prevent compressor liquid hammer. The return tube inlet manifold 12 extends from the middle of the end cap 6.

The bottom of the shell 7 is provided with a liquid level sensor 13. The liquid level sensor 13 outputs the liquid level height value to the air conditioner controller in real time, and when the liquid level value is abnormal (too high), the air conditioner controller reduces the liquid level height by adopting a method of reducing the opening degree of the expansion valve 16. This way, the compressor can be effectively prevented from generating liquid impact. The measuring end of the liquid level sensor 13 is positioned at the bottom in the separating container, the signal processing and output end of the liquid level sensor is positioned outside the separating container, and the output signal is transmitted to a controller of the air conditioning system.

As shown in fig. 2, a refrigeration system for a carbon dioxide refrigerant air conditioner includes a compressor 15, a gas cooler 18, an expansion valve 16, an evaporator 17, and an integrated heat recovery gas-liquid separator 14 for a carbon dioxide refrigerant air conditioner according to this embodiment, an outlet of the compressor 15 is connected to an inlet of the gas cooler 18, an outlet of the gas cooler 18 is connected to a heat recovery pipe inlet manifold 12, a gaseous refrigerant enters the heat recovery pipe 5 from the heat recovery pipe inlet manifold 12 to exchange heat with a refrigerant in the housing 7, the heat recovery pipe outlet manifold 11 is connected to an inlet of the expansion valve 16, the gaseous refrigerant enters the expansion valve 16 through the heat recovery pipe outlet manifold 11, an outlet of the expansion valve 16 is connected to an inlet of the evaporator 17, an outlet of the evaporator 17 is connected to the gas inlet pipe 1, and a port of the external pipe section 21 is used as a gas outlet 8 of the gas exhaust pipe, connected to the inlet of the compressor 15. When the compressor 15 operates, negative pressure is generated at the oil return hole 3, lubricating oil is sucked into the oil return hole 3, refrigerant mixed lubricating oil enters the compressor through the exhaust pipe air outlet 8, the stable operation of the compressor is guaranteed, and liquid is prevented from entering the compressor when the compressor stops. The expansion valve 16 is an electronic expansion valve.

The above-mentioned embodiments are only for describing the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art without departing from the design spirit of the present invention should fall into the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides an integrate back hot gas-liquid separator for carbon dioxide refrigerant air conditioner, includes the casing, be equipped with intake pipe and blast pipe on the casing, the intake pipe sets up in the lower part of casing, its characterized in that: the exhaust pipe comprises an external pipe section extending out of the upper portion of the shell and an internal pipe section of a U-shaped structure, the port of the internal pipe section is located on the upper portion of the internal space of the shell, the heat recovery pipe comprises a heat recovery pipe air inlet main pipe, a heat recovery pipe air outlet main pipe and more than two branch pipes connected between the heat recovery pipe air inlet main pipe and the heat recovery pipe air outlet main pipe in parallel, the heat recovery pipe air inlet main pipe extends out of the upper portion of the shell, and the heat recovery pipe air outlet main pipe extends out of the lower portion of the shell.

2. The integrated heat and gas separator as claimed in claim 1, wherein the integrated heat and gas separator comprises: the regenerative tube comprises more than six branch tubes which are arranged around a regenerative tube air inlet main pipe and a regenerative tube air outlet main pipe.

3. The integrated heat and gas separator as claimed in claim 2, wherein the integrated heat and gas separator comprises: the two end parts of the branch pipes are bent towards the same side, the upper ends of the branch pipes are communicated with the inlet main pipe of the regenerative pipe, the lower ends of the branch pipes are communicated with the outlet main pipe of the regenerative pipe, and the angles between the adjacent branch pipes are the same.

4. The integrated heat and gas separator as claimed in claim 3, wherein the integrated heat and gas separator comprises: and two end parts of the branch pipe are bent by 90 degrees.

5. The integrated return hot gas-liquid separator for a carbon dioxide refrigerant air conditioner as claimed in any one of claims 2 to 4, wherein: the branch pipe is a copper pipe with the pipe diameter of 5mm and the wall thickness of 1 mm.

6. The integrated heat and gas separator as claimed in claim 1, wherein the integrated heat and gas separator comprises: the upper portion of one side that inside pipeline section and outside pipeline section link to each other is equipped with the balancing hole, the bottom of inside pipeline section is equipped with the oil gallery.

7. The integrated heat and gas separator as claimed in claim 6, wherein: the port of the inner pipe section faces upwards, the distance between the port of the inner pipe section and the top of the shell is 12-16mm, and the diameter of the oil return hole is 2 mm.

8. The integrated heat and gas separator as claimed in claim 1, wherein the integrated heat and gas separator comprises: the shell comprises a shell body and an end cover arranged at the top of the shell body, wherein the end cover is of an arc-shaped structure.

9. The integrated heat and gas separator as claimed in claim 1, wherein the integrated heat and gas separator comprises: and a liquid level sensor is arranged at the bottom of the shell.

10. The utility model provides a refrigerating system for carbon dioxide refrigerant air conditioner, includes compressor, gas cooler, expansion valve and evaporimeter, its characterized in that: the integrated heat and gas return separator for a carbon dioxide refrigerant air conditioner further comprises any one of claims 1 to 8, wherein an outlet of the compressor is connected with an inlet of the gas cooler, an outlet of the gas cooler is connected with an inlet manifold of the heat return pipe, an outlet manifold of the heat return pipe is connected with an inlet of the expansion valve, an outlet of the expansion valve is connected with an inlet of the evaporator, an outlet of the evaporator is connected with the inlet pipe, and a port of the external pipe section is connected with an inlet of the compressor.