CN210512773U - Carbon dioxide heat exchanger - Google Patents
Carbon dioxide heat exchanger Download PDFInfo
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- CN210512773U CN210512773U CN201921391472.9U CN201921391472U CN210512773U CN 210512773 U CN210512773 U CN 210512773U CN 201921391472 U CN201921391472 U CN 201921391472U CN 210512773 U CN210512773 U CN 210512773U
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Abstract
The utility model discloses a carbon dioxide heat exchanger, include: the first liquid collecting pipe, the second liquid collecting pipe and the heat exchange assembly. The first header pipe has a medium inlet and a medium outlet. The heat exchange assembly is connected between the first liquid collecting pipe and the second liquid collecting pipe, the heat exchange assembly comprises a plurality of flat pipes and a plurality of fins, each flat pipe comprises a travel flat pipe and a return flat pipe, the travel flat pipes and the return flat pipes are arranged at intervals and are communicated with the first liquid collecting pipe and the second liquid collecting pipe, a plurality of fins are arranged between the adjacent flat pipes, the fins are in contact with the flat pipes, and the flat pipes and the fins are arranged in the same plane. Carbon dioxide medium enters the first liquid collecting pipe through the medium inlet, flows into the second liquid collecting pipe through the pass flat pipe, flows back to the first liquid collecting pipe through the return flat pipe and flows out from the medium outlet, the fins conduct heat between the pass flat pipe and the return flat pipe so that the temperature of the carbon dioxide medium in the pass flat pipe and the return flat pipe is balanced, and air blows through the heat exchange assembly in the direction perpendicular to the plane.
Description
Technical Field
The utility model relates to an air conditioner field, more specifically say, relate to the heat exchanger in the air conditioner.
Background
In a conventional heat exchanger for an air conditioner for a vehicle, the refrigerant medium used is R134a or R1234 yf. The heat exchanger comprises a first liquid collecting pipe, a second liquid collecting pipe and a heat exchange assembly. The first header pipe has a medium inlet and a medium outlet. The heat exchange assembly is connected between the first liquid collecting pipe and the second liquid collecting pipe. The heat exchange component comprises a plurality of flat pipes. The flat pipe is divided into a travel flat pipe and a return flat pipe, and the travel flat pipe and the return flat pipe are communicated with the first liquid collecting pipe and the second liquid collecting pipe. All the travel flat pipes are arranged adjacently, and all the return flat pipes are arranged adjacently. The travel flat pipe and the return flat pipe are arranged in the same plane to form a plate-shaped structure. For a traditional heat exchanger, generally, one half part of a heat exchange assembly is a go flat pipe, and the other half part of the heat exchange assembly is a return flat pipe. For example, the upper half portion is centrally provided with a go flat tube and the lower half portion is centrally provided with a return flat tube. Refrigerant medium R134a or R1234yf enters the first header pipe through a medium inlet, then is collected into the second header pipe through a pass flat pipe, and then is collected into the first header pipe again through a return flat pipe. For a single layer, dual pass heat exchanger, the process is complete and refrigerant medium flows out of the medium outlet. For the double-layer four-flow heat exchanger, the refrigerant medium flows into the travel flat pipe of the heat exchange assembly on the next layer again, passes through the second liquid collector and returns to the first liquid collecting pipe from the return flat pipe. If more layers of heat exchange assemblies are available, the process is repeated until all layers of heat exchange assemblies flow to the first liquid collector and flow out of the medium outlet.
With the increasing environmental requirements, carbon dioxide media have been increasingly used in automobile air conditioners as refrigerant media instead of R134a or R1234 yf. The temperature of the carbon dioxide medium can slide when the carbon dioxide medium exchanges heat under the supercritical state, so that in the heat exchanger using the carbon dioxide medium, the phenomenon that the temperatures of the carbon dioxide medium in different areas of the flat pipe are different can occur due to the temperature slide. And the traditional refrigeration medium of R134a or R1234yf has no temperature slip, so the problem of uneven medium temperature is not encountered. Due to the temperature glide phenomenon, if the carbon dioxide medium is directly put into the heat exchanger of the conventional structure for use, the following problems are encountered: because the carbon dioxide can generate temperature slippage when exchanging heat under the supercritical state, the temperature of the carbon dioxide medium in the heat exchanger can be gradually reduced. If still use traditional round of journey and the flat heat exchanger structure that the pipe concentrates the setting respectively of return stroke, will make the temperature difference of the carbon dioxide medium of the different regions of heat exchanger, the heat of exchange will be different when the air passes through the different positions of heat exchanger, and the air-out temperature also can be different, and the air-out temperature homogeneity that leads to the heat exchanger is relatively poor, and great difference can appear in the air-out temperature of different air outlets, influences passenger's travelling comfort impression. Meanwhile, as the temperature difference between the carbon dioxide medium and the air is gradually reduced, the heat exchange amount is affected, and the energy efficiency ratio of the system is reduced.
One solution in the prior art is to add an intermediate medium, such as water, between the carbon dioxide medium and the air. The carbon dioxide medium firstly exchanges heat with water, and then the water exchanges heat with air secondarily. The change of the temperature difference is reduced by a secondary circulation mode, and the condition of uneven temperature is reduced. However, the secondary circulation needs to arrange an additional circulation pipeline, and uses additional media and heat exchange devices, so that the manufacturing cost and the whole volume of the heat exchanger are increased. Furthermore, the complexity of the piping and the medium adversely affects the stability of the device.
SUMMERY OF THE UTILITY MODEL
The utility model provides a heat exchanger that is fit for carbon dioxide dielectric property can solve the inhomogeneous problem of temperature.
According to the utility model discloses an embodiment provides a carbon dioxide heat exchanger, include: the first liquid collecting pipe, the second liquid collecting pipe and the heat exchange assembly. The first header pipe has a medium inlet and a medium outlet. The heat exchange component is connected between the first liquid collecting pipe and the second liquid collecting pipe, the heat exchange component comprises a plurality of fins and a plurality of flat pipes of the plurality of liquid collecting pipes, the flat pipes comprise flat pipes of a trip removing part and flat pipes of a return stroke, the flat pipes of the trip removing part and the flat pipes of the return stroke are communicated with the first liquid collecting pipes and the second liquid collecting pipes, the flat pipes of the trip removing part and the flat pipes of the return stroke are arranged at intervals, the plurality of fins are arranged between the adjacent flat pipes, the fins are in contact with the flat pipes, and the fins. The carbon dioxide medium enters the first liquid collecting pipe through the medium inlet, flows into the second liquid collecting pipe from the first liquid collecting pipe through the flat pipe in the past stroke, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the flat pipe in the return stroke, flows out from the medium outlet, and the fins conduct heat between the flat pipe in the past stroke and the flat pipe in the return stroke to balance the temperature of the carbon dioxide medium in the flat pipe in the past stroke and the flat pipe in the return stroke, and air blows through the heat exchange component in the direction perpendicular to the plane to exchange heat with the carbon dioxide medium in the flat pipe.
In one embodiment, the carbon dioxide heat exchanger is a single-layer double-flow-path heat exchanger, and a heat exchange assembly is arranged between the first liquid collecting pipe and the second liquid collecting pipe. The carbon dioxide medium flows into the second liquid collecting pipe from the first liquid collecting pipe through the flat pipe in the first flow, and flows back to the first liquid collecting pipe from the second liquid collecting pipe through the flat pipe in the return flow to form the second flow.
In one embodiment, the first header tube is divided into an inflow chamber and an outflow chamber. The inflow cavity is communicated with the medium inlet and the journey-removing flat pipe, and the carbon dioxide medium enters the inflow cavity from the medium inlet and then enters the journey-removing flat pipe. The outflow cavity is communicated with the medium outlet and the return flat pipe, and the carbon dioxide medium enters the outflow cavity from the return flat pipe and then flows out from the medium outlet.
In one embodiment, the second liquid collecting pipe is a single cavity and is communicated with the travel flat pipe and the return flat pipe, and the carbon dioxide medium flows into the second liquid collecting pipe through the travel flat pipe and then flows out of the second liquid collecting pipe from the return flat pipe.
In one embodiment, the carbon dioxide heat exchanger is a double-layer four-flow heat exchanger, and two parallel heat exchange assemblies are arranged between the first liquid collecting pipe and the second liquid collecting pipe. The carbon dioxide medium flows into the second liquid collecting pipe from the first liquid collecting pipe through the stroke-removing flat pipe of the first heat exchange assembly to form a first flow, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return-stroke flat pipe of the first heat exchange assembly to form a second flow, flows into the second liquid collecting pipe from the first liquid collecting pipe through the stroke-removing flat pipe of the second heat exchange assembly to form a third flow, and flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return-stroke flat pipe of the second heat exchange assembly to form a fourth flow.
In one embodiment, the first header tube is divided into an inflow chamber, an intermediate chamber, and an outflow chamber. The inflow cavity is communicated with the medium inlet and the stroke-removing flat pipe of the first heat exchange assembly, and the carbon dioxide medium enters the inflow cavity from the medium inlet and then enters the stroke-removing flat pipe of the first heat exchange assembly. The middle cavity is communicated with the return flat tube of the first heat exchange assembly and the travel flat tube of the second heat exchange assembly, and a carbon dioxide medium enters the middle cavity from the return flat tube of the first heat exchange assembly and then enters the travel flat tube of the second heat exchange assembly. The outflow cavity is communicated with the medium outlet and the return flat pipe of the second heat exchange assembly, and the carbon dioxide medium enters the outflow cavity from the return flat pipe of the second heat exchange assembly and then flows out from the medium outlet.
In one embodiment, the second header separates into a first chamber and a second chamber. The first cavity is communicated with the stroke-removing flat pipe of the first heat exchange component and the return-stroke flat pipe of the first heat exchange component, and the carbon dioxide medium flows into the first cavity through the stroke-removing flat pipe of the first heat exchange component and then flows out of the first cavity from the return-stroke flat pipe of the first heat exchange component. The second cavity is communicated with the stroke-going flat pipe of the second heat exchange assembly and the return-stroke flat pipe of the second heat exchange assembly, and the carbon dioxide medium flows into the second cavity through the stroke-going flat pipe of the second heat exchange assembly and then flows out of the second cavity from the return-stroke flat pipe of the second heat exchange assembly.
In one embodiment, the flat tubes are made of copper and the fins are made of copper or aluminum.
The utility model discloses a carbon dioxide heat exchanger is through the mechanism that increases the heat transfer between the flat pipe of journey of going and the return stroke flat pipe for the difference in temperature between each flat pipe is dwindled, has improved the uneven problem of carbon dioxide medium temperature distribution, and the temperature that reduces the carbon dioxide medium slides, promotes the temperature homogeneity and the heat exchange efficiency of heat exchanger. The carbon dioxide heat exchanger does not need to introduce secondary circulation, so that the rise of cost and risk is avoided.
Drawings
The above and other features, properties and advantages of the present invention will become more apparent from the following description of the embodiments with reference to the accompanying drawings, in which like reference numerals refer to like features throughout, and in which:
fig. 1 discloses a block diagram of a single layer dual pass heat exchanger according to an embodiment of the present invention.
Fig. 2 discloses a structure diagram of the first liquid collecting tube in the single-layer double-flow heat exchanger according to an embodiment of the present invention.
Fig. 3 discloses a structure diagram of a double-layer four-flow heat exchanger according to an embodiment of the present invention.
Fig. 4 discloses a disassembled structure diagram of the double-layer four-flow heat exchanger according to an embodiment of the present invention.
Fig. 5 shows a structural diagram of the first liquid collecting tube in the double-layer four-flow heat exchanger according to an embodiment of the present invention.
Detailed Description
The utility model provides a carbon dioxide heat exchanger, include: the first liquid collecting pipe, the second liquid collecting pipe and the heat exchange assembly. The first header pipe has a medium inlet and a medium outlet. The heat exchange assembly is connected between the first liquid collecting pipe and the second liquid collecting pipe. The heat exchange component comprises a plurality of flat pipes and a plurality of fins. The flat pipe comprises a travel-away flat pipe and a return-stroke flat pipe, and the travel-away flat pipe and the return-stroke flat pipe are communicated with the first liquid collecting pipe and the second liquid collecting pipe. The distance-removing flat pipes and the return-stroke flat pipes are arranged at intervals, a plurality of fins are arranged between the adjacent flat pipes, and the fins are in contact with the flat pipes. The flat tubes and the fins among the flat tubes are arranged in the same plane to form a plate-shaped heat exchange assembly. The carbon dioxide medium enters the first liquid collecting pipe through the medium inlet, flows into the second liquid collecting pipe from the first liquid collecting pipe through the flat pipe in the past stroke, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the flat pipe in the return stroke, flows out from the medium outlet, and the fins conduct heat between the flat pipe in the past stroke and the flat pipe in the return stroke to balance the temperature of the carbon dioxide medium in the flat pipe in the past stroke and the flat pipe in the return stroke, and air blows through the heat exchange component in the direction perpendicular to the plane to exchange heat with the carbon dioxide medium in the flat pipe.
The carbon dioxide heat exchanger may be configured as a single layer two-pass heat exchanger or a double layer four-pass heat exchanger, depending on the requirements.
Fig. 1 and 2 show a structural view of a single-layer double-flow heat exchanger, wherein fig. 1 is a structural view of a single-layer double-flow heat exchanger, fig. 2 is a structural view of a first header in a single-layer double-flow heat exchanger, and as shown in the drawing, the carbon dioxide heat exchanger is configured as a single-layer double-flow heat exchanger, and includes a first header 101, a second header 102, and a heat exchange assembly, wherein the first header 101 has a medium inlet 111 and a medium outlet 112, a heat exchange assembly 103 is provided between the first header 101 and the second header 102, the heat exchange assembly 103 includes a plurality of flat tubes and a plurality of fins 133, the flat tubes include a return flat tube 131 and a return flat tube 132, the return flat tube 131 and the return flat tube 132 are both in communication with the first header 101 and the second header 102, the return flat tubes 131 and the return flat tube 132 are spaced apart from each other, i.e., the two flat tubes adjacent to each return flat tube 131, the return flat tube 131 is provided between the adjacent flat tubes, the plurality of fins 133, the fins are in contact fins, the heat exchanger, the heat transfer temperature difference between the fins 133 is reduced, and the heat transfer medium temperature difference between the first header ② is uniform, the second header 101, the heat exchanger is uniform, the second header 102, the heat exchanger is uniform, the second header is formed in the second header 101, and the second header 102, the heat exchanger, the second header 102 is formed in the.
In order to realize the above-described double flow path, the interior of the first header pipe 101 is divided into the inflow chamber 113 and the outflow chamber 114. Referring to fig. 2, the inflow chamber 113 and the outflow chamber 114 are not communicated with each other, and are two independently partitioned chambers. The inflow cavity 113 is communicated with the medium inlet 111 and the going flat tube 131, and the carbon dioxide medium enters the inflow cavity 113 from the medium inlet 111 and then enters the going flat tube 131. The outflow cavity 114 is communicated with the medium outlet 112 and the return flat tube 132, and the carbon dioxide medium enters the outflow cavity 114 from the return flat tube 132 and then flows out from the medium outlet 112. The structure of the second liquid collecting pipe 102 is simple, the second liquid collecting pipe is a single cavity, the single cavity is communicated with the trip flat pipe and the return flat pipe, and carbon dioxide medium flows into the second liquid collecting pipe through the trip flat pipe and then flows out of the second liquid collecting pipe from the return flat pipe. The internal structure of the second header pipe is not shown.
Carbon dioxide medium enters the first liquid collecting pipe through the medium inlet, flows into the second liquid collecting pipe from the first liquid collecting pipe through the first process flat pipe, carries out a first process ①, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return stroke flat pipe, carries out a second process ②, and flows out from the medium outlet.
Fig. 3, 4 and 5 disclose structural diagrams of a heat exchanger configured as a double-layer four-flow heat exchanger, wherein fig. 3 discloses a structural diagram of a heat exchanger configured as a double-layer four-flow heat exchanger, fig. 4 discloses a disassembled structural diagram of a heat exchanger configured as a double-layer four-flow heat exchanger, fig. 5 discloses a structural diagram of a first header pipe in a double-layer four-flow heat exchanger, fig. 3 discloses a structural diagram of a double-layer four-flow heat exchanger, fig. 5 discloses a structural diagram of a first header pipe in a double-layer four-flow heat exchanger, fig. 3 is configured as a double-layer four-flow heat exchanger, including a first header pipe 201, a second header pipe 202 and a heat exchange assembly, a first header pipe 201 has a medium inlet 211 and a medium outlet 212, two parallel heat exchange assemblies are provided between the first header pipe 201 and the second header pipe 202, the first heat exchange assembly 203 and the second heat exchange assembly 204 include a plurality of flat pipes 233, the first heat exchange assembly 203 includes a plurality of flat pipes 231 and a plurality of flat pipes 233, the return pipes 231, the return pipes 232, the return pipes 231 and the return pipes 232 are provided with a plurality of flat pipes 232, the same flat pipes 201, the return pipes 201 and the return pipes 201, the return pipes 201 and the flat pipes 201, the return pipes 201 are provided with a plurality of flat pipes 201, the same flat pipes 201, the heat exchange assemblies 201, the return pipes 201 and the flat pipes 201, the flat pipes 201 is provided with a heat exchange assemblies 2, the flat pipes 201, the flat pipes 233 is provided with the flat pipes 201, the flat pipes 21 and the flat pipes 201, the flat pipes 21 and the flat pipes 21 are provided with the flat pipes 201.
In order to realize the above four processes, the interior of the first header 201 is divided into three chambers: an inflow chamber 213, an intermediate chamber 215 and an outflow chamber 214. Referring to fig. 5, the inflow chamber 213, the intermediate chamber 215, and the outflow chamber 214 are not communicated with each other, and are three independently partitioned chambers. The inflow cavity 213 is communicated with the medium inlet 211 and the forward flat tube 231 of the first heat exchange assembly 203, and the carbon dioxide medium enters the inflow cavity 213 from the medium inlet 211 and then enters the forward flat tube 231 of the first heat exchange assembly 203. The middle cavity 215 is communicated with the return flat tube 232 of the first heat exchange assembly 203 and the going flat tube 241 of the second heat exchange assembly 204, and the carbon dioxide medium enters the middle cavity 215 from the return flat tube 232 of the first heat exchange assembly 203 and then enters the going flat tube 241 of the second heat exchange assembly 204. The outflow cavity 214 is communicated with the medium outlet 212 and the return flat tube 242 of the second heat exchange assembly 204, and the carbon dioxide medium enters the outflow cavity 214 from the return flat tube 242 of the second heat exchange assembly 204 and then flows out from the medium outlet 212. In the double-layer four-flow carbon dioxide heat exchanger, the second liquid collecting pipe is divided into a first cavity and a second cavity. The first cavity is communicated with the stroke-removing flat pipe of the first heat exchange component and the return-stroke flat pipe of the first heat exchange component, and the carbon dioxide medium flows into the first cavity through the stroke-removing flat pipe of the first heat exchange component and then flows out of the first cavity from the return-stroke flat pipe of the first heat exchange component. The second cavity is communicated with the stroke-going flat pipe of the second heat exchange assembly and the return-stroke flat pipe of the second heat exchange assembly, and the carbon dioxide medium flows into the second cavity through the stroke-going flat pipe of the second heat exchange assembly and then flows out of the second cavity from the return-stroke flat pipe of the second heat exchange assembly. Although two cavities are separated by the second liquid collecting pipe of the double-layer four-flow carbon dioxide heat exchanger, the travel flat pipe and the return flat pipe which are communicated with the same heat exchange assembly are arranged in each cavity, and therefore the second liquid collecting pipe is only required to be separated according to the installation positions of the first heat exchange assembly and the second heat exchange assembly. The internal structure of the second header pipe is not shown.
Carbon dioxide medium enters the first liquid collecting pipe through the medium inlet, flows into the second liquid collecting pipe from the first liquid collecting pipe through the going flat pipe of the first heat exchange assembly, carries out a first process ①, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return flat pipe of the first heat exchange assembly, carries out a second process ②, flows into the second liquid collecting pipe from the first liquid collecting pipe through the going flat pipe of the second heat exchange assembly, carries out a third process ③, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return flat pipe of the second heat exchange assembly, carries out a fourth process ④, and finally flows out from the medium outlet.
In order to make the flat tubes and the fins have better thermal conductivity, in one embodiment, the flat tubes are made of copper, and the fins are made of copper or aluminum.
The utility model discloses a carbon dioxide heat exchanger is through the mechanism that increases the heat transfer between the flat pipe of journey of going and the return stroke flat pipe for the difference in temperature between each flat pipe is dwindled, has improved the uneven problem of carbon dioxide medium temperature distribution, and the temperature that reduces the carbon dioxide medium slides, promotes the temperature homogeneity and the heat exchange efficiency of heat exchanger. The carbon dioxide heat exchanger does not need to introduce secondary circulation, so that the rise of cost and risk is avoided.
The above-described embodiments are provided to enable persons skilled in the art to make or use the invention, and many modifications and variations may be made to the above-described embodiments by persons skilled in the art without departing from the inventive concept of the present invention, so that the scope of the invention is not limited by the above-described embodiments, but should be accorded the widest scope consistent with the innovative features set forth in the claims.
Claims (8)
1. A carbon dioxide heat exchanger, comprising:
the first liquid collecting pipe is provided with a medium inlet and a medium outlet;
a second liquid collecting pipe;
the heat exchange assembly is connected between the first liquid collecting pipe and the second liquid collecting pipe and comprises a plurality of flat pipes and a plurality of fins, each flat pipe comprises a travel flat pipe and a return flat pipe, the travel flat pipes and the return flat pipes are communicated with the first liquid collecting pipe and the second liquid collecting pipe, the travel flat pipes and the return flat pipes are arranged at intervals, the fins are arranged between the adjacent flat pipes and are in contact with the flat pipes, and the fins between the flat pipes are arranged in the same plane;
carbon dioxide medium enters the first liquid collecting pipe through the medium inlet, flows into the second liquid collecting pipe from the first liquid collecting pipe through the first liquid collecting pipe, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return flat pipe, and flows out from the medium outlet, the fins conduct heat between the travel flat pipe and the return flat pipe to balance the temperature of the carbon dioxide medium in the travel flat pipe and the return flat pipe, and air is blown through the heat exchange component along the direction perpendicular to the plane to exchange heat with the carbon dioxide medium in the flat pipes.
2. The carbon dioxide heat exchanger of claim 1,
the carbon dioxide heat exchanger is a single-layer double-flow heat exchanger, and a heat exchange assembly is arranged between the first liquid collecting pipe and the second liquid collecting pipe;
the carbon dioxide medium flows into the second liquid collecting pipe from the first liquid collecting pipe through the flat pipe in the first flow, and flows back to the first liquid collecting pipe from the second liquid collecting pipe through the flat pipe in the return flow to form the second flow.
3. The carbon dioxide heat exchanger of claim 2,
the first liquid collecting pipe is internally divided into an inflow cavity and an outflow cavity;
the inflow cavity is communicated with the medium inlet and the journey-going flat pipe, and the carbon dioxide medium enters the inflow cavity from the medium inlet and then enters the journey-going flat pipe;
the outflow cavity is communicated with the medium outlet and the return flat pipe, and the carbon dioxide medium enters the outflow cavity from the return flat pipe and then flows out from the medium outlet.
4. The carbon dioxide heat exchanger of claim 2,
the second liquid collecting pipe is a single cavity and is communicated with the travel flat pipe and the return flat pipe, and carbon dioxide medium flows into the second liquid collecting pipe through the travel flat pipe and then flows out of the second liquid collecting pipe from the return flat pipe.
5. The carbon dioxide heat exchanger of claim 1,
the carbon dioxide heat exchanger is a double-layer four-flow heat exchanger, and two parallel heat exchange assemblies are arranged between the first liquid collecting pipe and the second liquid collecting pipe;
the carbon dioxide medium flows into the second liquid collecting pipe from the first liquid collecting pipe through the stroke-removing flat pipe of the first heat exchange assembly to form a first flow, flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return-stroke flat pipe of the first heat exchange assembly to form a second flow, flows into the second liquid collecting pipe from the first liquid collecting pipe through the stroke-removing flat pipe of the second heat exchange assembly to form a third flow, and flows back to the first liquid collecting pipe from the second liquid collecting pipe through the return-stroke flat pipe of the second heat exchange assembly to form a fourth flow.
6. The carbon dioxide heat exchanger of claim 5,
the first liquid collecting pipe is internally divided into an inflow cavity, a middle cavity and an outflow cavity;
the inflow cavity is communicated with the medium inlet and the journey-going flat tube of the first heat exchange assembly, and the carbon dioxide medium enters the inflow cavity from the medium inlet and then enters the journey-going flat tube of the first heat exchange assembly;
the middle cavity is communicated with the return flat tube of the first heat exchange assembly and the travel flat tube of the second heat exchange assembly, and a carbon dioxide medium enters the middle cavity from the return flat tube of the first heat exchange assembly and then enters the travel flat tube of the second heat exchange assembly;
the outflow cavity is communicated with the medium outlet and the return flat pipe of the second heat exchange assembly, and the carbon dioxide medium enters the outflow cavity from the return flat pipe of the second heat exchange assembly and then flows out from the medium outlet.
7. The carbon dioxide heat exchanger of claim 2,
the second liquid collecting pipe is divided into a first cavity and a second cavity;
the first cavity is communicated with the travel flat tube of the first heat exchange assembly and the return flat tube of the first heat exchange assembly, and the carbon dioxide medium flows into the first cavity through the travel flat tube of the first heat exchange assembly and then flows out of the first cavity from the return flat tube of the first heat exchange assembly;
the second cavity is communicated with the stroke-going flat pipe of the second heat exchange assembly and the return-stroke flat pipe of the second heat exchange assembly, and the carbon dioxide medium flows into the second cavity through the stroke-going flat pipe of the second heat exchange assembly and then flows out of the second cavity from the return-stroke flat pipe of the second heat exchange assembly.
8. The carbon dioxide heat exchanger of claim 2, wherein the flat tubes are made of copper and the fins are made of copper or aluminum.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921391472.9U CN210512773U (en) | 2019-08-26 | 2019-08-26 | Carbon dioxide heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921391472.9U CN210512773U (en) | 2019-08-26 | 2019-08-26 | Carbon dioxide heat exchanger |
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| Publication Number | Publication Date |
|---|---|
| CN210512773U true CN210512773U (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201921391472.9U Active CN210512773U (en) | 2019-08-26 | 2019-08-26 | Carbon dioxide heat exchanger |
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| CN (1) | CN210512773U (en) |
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2019
- 2019-08-26 CN CN201921391472.9U patent/CN210512773U/en active Active
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