CN216953616U

CN216953616U - Gas cooler for CO2 heat pump air-conditioning system

Info

Publication number: CN216953616U
Application number: CN202220329248.2U
Authority: CN
Inventors: 韩小娇; 李明
Original assignee: Nanjing Xiezhong Auto Airconditioner Company Co ltd
Current assignee: Nanjing Xiezhong Auto Airconditioner Company Co ltd
Priority date: 2022-02-15
Filing date: 2022-02-15
Publication date: 2022-07-12
Anticipated expiration: 2032-02-15

Abstract

The utility model disclosesCO (carbon monoxide)₂Heat pump air conditioning system uses gas cooler, two pressure manifold including parallel arrangement, the pressure manifold middle part sets up the baffle, separate the pressure manifold for two sections at least through the baffle, the pressure manifold tip sets up stifled cap, set up the air inlet joint clamp plate on a pressure manifold, set up the joint clamp plate of giving vent to anger on another flow tube, set up a plurality of flat pipes along pressure manifold length direction interval between two pressure manifolds, switch on two pressure manifolds through flat pipe, flat pipe both sides set up the fin, fin one side that is closest to the pressure manifold tip sets up the sideboard, flat pipe is the platykurtic, the flat pipe is last to have the aperture that link up the setting along length direction and does, the aperture is a plurality of, interval arrangement side by side along flat pipe width direction. The gas cooler can be matched with an ultrahigh pressure working environment, the refrigerating/heating performance of the heat pump air conditioning system is obviously improved, and the more compact unit design and the reduction of the flow cross section can be realized.

Description

CO (carbon monoxide)2Gas cooler for heat pump air conditioning system

Technical Field

The utility model relates to a new energy automobile air conditioning system, in particular to CO₂A gas cooler is used in a heat pump air conditioning system.

Background

The heat pump air conditioner of the new energy vehicle can be classified into R134a type and CO type according to different refrigerants₂Type (R744), type R1234yf, and the like. The R134a heat pump air-conditioning system is the mainstream of the current market, but the GWP value (potential value of greenhouse effect) is as high as 1400, and the GWP value cannot meet the regulation of less than 150 in the directive of the automobile air-conditioning system of the European Union. Although R1234yf has a GWP of 4, it will produce HF, HCL and CFC, etc. in the production process, and it has a certain safety problem, so some car enterprises will be the carbon dioxide system as a new direction of development.

CO₂As a refrigerant, the GWP value is only 1, the refrigeration performance is basically equivalent to that of R134a, the heating performance is 1.6 times that of an R134a system and 3.5 times that of PTC, the endurance mileage of the whole vehicle in winter can be improved by more than 20%, the environmental application range can be widened to-30 ℃, and the refrigerant is a preferred alternative of a future R134a heat pump air-conditioning system.

To match CO₂In the ultrahigh pressure working environment of the heat pump air conditioning system, a high pressure resistant gas cooler needs to be developed again.

SUMMERY OF THE UTILITY MODEL

Utility model purpose: the utility model aims to provide CO capable of adapting to ultrahigh pressure working environment₂A gas cooler is used in a heat pump air conditioning system.

In order to achieve the purpose, the utility model adopts the following technical scheme:

CO (carbon monoxide)₂The gas cooler for heat pump air conditioning system includes two parallel flow collecting pipes with partition board in the middle partThe flow tube is separated for at least two sections, and the tip of pressure manifold sets up stifled cap, sets up the admission joint clamp plate on one of them pressure manifold, sets up the joint clamp plate of giving vent to anger on another flow tube, sets up a plurality of flat pipes along pressure manifold length direction interval between two pressure manifolds, switches on two pressure manifolds through flat pipe, and flat pipe both sides set up the fin, and fin one side closest to the pressure manifold tip sets up the sideboard, flat pipe is the platykurtic, has on the flat pipe to link up the aperture that sets up as the refrigerant circulation passageway along length direction, and the quantity of aperture is a plurality of to the width direction along flat pipe is interval arrangement side by side.

Furthermore, the cross section of the small holes is circular or approximately circular, the diameter of each small hole is about 46% of the height of the flat pipe, the sum of the cross sections of all the small holes accounts for 21% of the cross section of the flat pipe, and the distance between every two adjacent small holes is about 0.45 mm.

Further, the width of the flat pipe is 12mm, and the height of the flat pipe is 1.3 mm.

Furthermore, the collecting pipe is a circular pipe, a plurality of flat pipe grooves are formed in the collecting pipe at intervals along the length direction and used for installing flat pipes, and the thickness of the pipe wall of the collecting pipe is more than 2.2 mm.

Furthermore, the partition plates are riveted and inserted into the partition plate grooves on the collecting pipe and fixed through riveting, and the partition plates are made of aluminum alloy composite plates for brazing.

Furthermore, the blocking caps are welded at two ends of the collecting pipe and are made of aluminum alloy composite plates for brazing.

Furthermore, the air inlet joint pressing plate and the air outlet joint pressing plate are arranged at the positions, close to the end parts, of the collecting pipes, and the air outlet joint pressing plate are both formed by extrusion of aluminum alloy sections.

Furthermore, the fins and the side plates are all made of aluminum alloy composite plates for brazing.

Has the advantages that: CO2₂The refrigerant is a natural substance, and can enter natural circulation without any problem even if the refrigerant circuit leaks; comparison of R134a/R1234YF type Heat exchangers, CO₂The energy content is higher, and the same refrigerating capacity and CO can be realized by lower mass flow₂Air conditioning system with heat pumpThe system operating pressure is 10 times of that of the air conditioning system filled with the previously used refrigerant, and the gas cooler can bear the working pressure of up to 34Mpa and can be matched with CO₂The ultrahigh pressure working environment of the heat pump air conditioning system; the gas cooler significantly improves the cooling/heating performance of the heat pump air conditioning system, and also enables a more compact unit design and a reduced flow cross-section.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic structural view of a header;

FIG. 3 is a schematic view of the structure of the separator;

fig. 4 is a schematic cross-sectional view of a flat tube.

In the figure: 1-collecting pipe; 2-a separator; 3-blocking the cap; 4-air inlet joint pressure plate; 5-air outlet joint pressing plate; 6-side plate; 7-flat tube; 7-1-pore; 8-a fin; 9-flat pipe groove; 10-partition groove.

The specific implementation mode is as follows:

the utility model is further explained below with reference to the drawings.

As shown in FIG. 1, a CO of the present invention₂Gas cooler for heat pump air conditioning system, two pressure manifold 1 including parallel arrangement, the middle part of pressure manifold 1 sets up baffle 2, separate pressure manifold 1 for at least two sections respectively through baffle 2, can be used for adjusting the refrigerant flow, the tip of pressure manifold 1 sets up stifled cap 3, be used for the shutoff refrigerant, set up air inlet joint clamp plate 4 on one of them pressure manifold, set up on another flow tube and give vent to anger and connect clamp plate 5, set up a plurality of flat pipes 7 along 1 length direction interval of pressure manifold between two pressure manifold 1, switch on two pressure manifold 1 through flat pipe 7, flat pipe 7 both sides set up fin 8, 8 one side of fin closest to 1 tip of pressure manifold set up sideboard 6.

As shown in fig. 4, the flat tube 7 is flat, the flat tube 7 has a plurality of small holes 7-1 penetrating along the length direction as a refrigerant flow channel, and the small holes 7-1 are arranged side by side at intervals along the width direction of the flat tube 7. In this embodiment, the cross section of the small hole 7-1 is circular or approximately circular, and the diameter of the small hole 7-1 is about the height of the flat pipe 746% of the degree, the sum of the cross sections of the small holes 7-1 accounts for 21% of the cross section area of the flat tube 7, and the distance between two adjacent small holes 7-1 is about 0.45 mm. The width of the flat tube is 12mm, and the height of the flat tube is 1.3 mm. The gas cooler uses CO₂As a refrigerant, the small round holes in the flat pipe 7 are used as refrigerant circulation channels, so that the wall thickness of the flat pipe 7 can be effectively increased, and the high-pressure resistance of the flat pipe is improved. Due to CO₂The energy content of the refrigerant is higher, the same refrigerating capacity can be realized by lower mass flow, and the circular small hole design can meet the requirement of heat exchange performance.

As shown in fig. 2, the collecting main 1 is a circular pipe, a plurality of flat pipe grooves 9 are formed in the collecting main 1 at intervals along the length direction for installing flat pipes, partition plate grooves 10 for installing partition plates 2 are further formed in the collecting main 1, and the thickness of the pipe wall of the collecting main 1 is more than 2.2mm, so that the collecting main can bear the burst pressure of 34 Mpa.

As shown in fig. 3, both the

separators

10 and 2 are made of an aluminum alloy composite plate for brazing. The partition plate 2 is inserted into the partition plate groove 10 on the collecting pipe 1 and is fixed through riveting, and the structure of the blocking cap 3 is similar to that of the partition plate 2 and is welded at two ends of the collecting pipe 1.

The air inlet joint pressing plate 4 and the air outlet joint pressing plate 5 are arranged at the positions, close to the end parts, of the collecting pipe 1, and the air outlet joint pressing plate 4 and the air outlet joint pressing plate 5 are both formed by extrusion of aluminum alloy sections. The fins 8 and the side plates 6 are made of aluminum alloy materials, are made of aluminum alloy composite plates for brazing, and are machined and formed by matching with a cutter.

When the air conditioning system works, high-temperature high-pressure gaseous CO coming out of the compressor₂The refrigerant enters the upper side collecting pipe through the air inlet joint pressing plate 4 and then is divided through a plurality of small holes 7-1 on each flat pipe 7, when external air flows through the surface of the air cooler, the external air exchanges heat with the air through the flat pipes 7 and the fins 8, heat is released, and the external air is changed into supercritical cooled CO₂Gas merging into the lower header, CO subsequently cooled₂The gas is discharged through the outlet connector pressure plate 5 and enters the next internal heat exchanger for heat exchange.

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

Claims

1. CO (carbon monoxide)₂Gas cooler for heat pump air conditioning system, including two collecting pipes of parallel arrangement, the middle part of collecting pipe sets up the baffle, separate the collecting pipe for at least two sections respectively through the baffle, the tip of collecting pipe sets up stifled cap, set up the pressure head clamp plate that admits air on one of them collecting pipe, set up on another flow tube and give vent to anger and connect the clamp plate, set up a plurality of flat pipes along collecting pipe length direction interval between two collecting pipes, switch on two collecting pipes through flat pipe, flat pipe both sides set up the fin, fin one side that is closest to the collecting pipe tip sets up the sideboard, its characterized in that: the flat pipe is flat, and the flat pipe is provided with small holes which are communicated along the length direction and are used as refrigerant circulation channels, and the small holes are a plurality of and are arranged side by side at intervals along the width direction of the flat pipe.

2. CO according to claim 1₂A gas cooler for a heat pump air conditioning system is characterized in that: the cross section of the small hole is circular or approximately circular, the diameter of the small hole is about 46% of the height of the flat pipe, the sum of the cross sections of all the small holes accounts for 21% of the cross section of the flat pipe, and the distance between every two adjacent small holes is about 0.45 mm.

3. CO according to claim 2₂A gas cooler for a heat pump air conditioning system is characterized in that: the width of the flat pipe is 12mm, and the height of the flat pipe is 1.3 mm.

4. CO according to claim 1₂A gas cooler for a heat pump air conditioning system is characterized in that: the collecting main is a circular pipe, a plurality of flat pipe grooves are formed in the collecting main at intervals along the length direction and used for installing flat pipes, and the thickness of the pipe wall of the collecting main is more than 2.2 mm.

5. CO according to claim 1₂A gas cooler for a heat pump air conditioning system is characterized in that: the baffle rivet is inserted into the baffle groove on the collecting pipe and is fixed through riveting, and the baffle is made of an aluminum alloy composite plate for brazing.

6. CO according to claim 1₂A gas cooler for a heat pump air conditioning system is characterized in that: the blocking caps are welded at two ends of the collecting pipe and are made of aluminum alloy composite plates for brazing.

7. CO according to claim 1₂A gas cooler for a heat pump air conditioning system is characterized in that: the air inlet joint pressing plate and the air outlet joint pressing plate are arranged at the positions, close to the end parts, of the collecting pipes, and the air outlet joint pressing plate are both formed by extrusion of aluminum alloy sectional materials.

8. CO according to claim 1₂A gas cooler for a heat pump air conditioning system is characterized in that: the fins and the side plates are all made of aluminum alloy composite plates for brazing.