CN216592326U - Refrigeration and heating bidirectional countercurrent heat exchange device - Google Patents
Refrigeration and heating bidirectional countercurrent heat exchange device Download PDFInfo
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- CN216592326U CN216592326U CN202122664351.0U CN202122664351U CN216592326U CN 216592326 U CN216592326 U CN 216592326U CN 202122664351 U CN202122664351 U CN 202122664351U CN 216592326 U CN216592326 U CN 216592326U
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Abstract
The utility model discloses a refrigerating and heating bidirectional countercurrent heat exchange device, which comprises a heat exchanger, a heat exchanger and a heat exchanger, wherein the heat exchanger is provided with a first row of heat exchange tubes, a second row of heat exchange tubes and a third row of heat exchange tubes which are arranged in parallel and are sequentially communicated, the port of the third row of heat exchange tubes is a refrigerant inlet, and the port of the first row of heat exchange tubes is a refrigerant outlet; the refrigerant circulating pipe comprises a first liquid inlet pipe, a second gas inlet pipe, a first gas outlet pipe and a second liquid outlet pipe which can be selectively opened and closed respectively, the first liquid inlet pipe and the second gas inlet pipe are connected with a refrigerant inlet respectively, and the first gas outlet pipe and the second liquid outlet pipe are connected with a refrigerant outlet respectively; and the air blower is used for driving air flow to blow through the heat exchanger and blow to the direction of directing the first row of heat exchange tubes to the third row of heat exchange tubes. Through the first feed liquor pipe of selectivity switching, second intake pipe, first outlet duct and second drain pipe, no matter in the mode of refrigeration or heating, this scheme can both keep heat transfer against the current in the heat exchanger.
Description
Technical Field
The application relates to the technical field of air conditioners, in particular to a refrigerating and heating bidirectional countercurrent heat exchange device.
Background
According to the heat transfer formula Q ═ KA (Δ Tm), the larger the heat transfer temperature difference Δ Tm, the larger the heat transfer amount Q. The magnitude of the heat exchange temperature difference is related to the relative flow direction of the cold fluid and the hot fluid. The parallel cocurrent flow of the two heat exchange fluids is called as cocurrent flow; parallel countercurrent flow is referred to as "countercurrent flow". Under the condition that the properties, flow, inlet and outlet temperatures and heat exchange areas of the cold fluid and the hot fluid are the same, when the cold fluid and the hot fluid are arranged in a counter-flow mode, the cold fluid and the hot fluid have larger heat exchange temperature difference and smaller downstream flow. Therefore, when other conditions are the same, the larger the heat exchange temperature difference is, the larger the heat transfer quantity is, and the heat exchange effect is good. The required heat transfer area can be reduced for transferring as much heat. It can be understood that, during reverse heat exchange, under the condition that the time and the area of the mutual contact of the two media are relatively concurrent, the contact area is larger, the contact time (if the flow rates of the two media are different) is longer, and the heat exchange can be fully carried out.
In addition, the temperature of the hot fluid at the same section position in the heat exchanger is higher than that of the cold fluid, and if the concurrent flow arrangement is adopted, the final temperature of the hot fluid outlet is still higher than that of the cold fluid outlet; with a counter-flow arrangement, the outlet temperature of the hot fluid can be much lower than the outlet temperature of the cold fluid.
In a traditional heat exchanger with heating and cooling functions, the flowing directions of refrigerants in the heat exchanger in a cooling mode and a heating mode are just opposite, and the blowing direction of a fan is fixed, so that the flowing direction of the refrigerant in one mode of the cooling and the heating is always the same as the wind direction, namely the refrigerant is subjected to 'downstream' heat exchange, and the heat exchange effect of the heat exchanger in the mode is influenced.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model aims to: the refrigerating and heating bidirectional countercurrent heat exchange device can solve the technical problem that in a traditional heat exchanger, the flowing directions of refrigerants in the heat exchanger are opposite under a refrigerating mode and a heating mode, so that the flowing direction of the refrigerants is the same as the wind direction under a certain mode.
In order to achieve the purpose, the following technical scheme is adopted in the application:
the refrigeration and heating bidirectional countercurrent heat exchange device comprises:
the heat exchanger is provided with a first row of heat exchange tubes, a second row of heat exchange tubes and a third row of heat exchange tubes which are arranged in parallel and sequentially communicated, the ports of the third row of heat exchange tubes are refrigerant inlets, and the ports of the first row of heat exchange tubes are refrigerant outlets;
the refrigerant circulating pipe comprises a first liquid inlet pipe, a second gas inlet pipe, a first gas outlet pipe and a second liquid outlet pipe which can be selectively opened and closed respectively, the first liquid inlet pipe and the second gas inlet pipe are connected with the refrigerant inlet respectively, and the first gas outlet pipe and the second liquid outlet pipe are connected with the refrigerant outlet respectively;
and the air blower is used for driving air flow to blow through the heat exchanger and blow to the direction from the first row of heat exchange tubes to the third row of heat exchange tubes.
Optionally, the first liquid inlet pipe is provided with a first control valve, the second gas inlet pipe is provided with a second control valve, the first gas outlet pipe is provided with a third control valve, and the second liquid outlet pipe is provided with a fourth control valve, and the first control valve, the second control valve, the third control valve and the fourth control valve are respectively used for controlling the opening and closing of the refrigerant circulation pipes.
Optionally, the first control valve and the third control valve are both check valves, and the flow directions of the first control valve and the third control valve are the same.
Optionally, the second control valve and the fourth control valve are both check valves, and the flow directions of the second control valve and the fourth control valve are the same and opposite to the flow direction of the first control valve.
Optionally, the second control valve and the fourth control valve are both solenoid valves.
Optionally, the first control valve, the second control valve, the third control valve and the fourth control valve are all solenoid valves.
Optionally, the gas collecting device further comprises a liquid collecting pipe and a gas collecting pipe, the first liquid inlet pipe and the second liquid outlet pipe are respectively connected with the liquid collecting pipe, and the second gas inlet pipe and the first gas outlet pipe are respectively connected with the gas collecting pipe.
Optionally, the heat exchanger is provided with a plurality of heat exchange units, each heat exchange unit is provided with the first row of heat exchange tubes, the second row of heat exchange tubes and the third row of heat exchange tubes, and each heat exchange unit is connected with one group of the first liquid inlet tube, the second gas inlet tube, the first gas outlet tube and the second liquid outlet tube; all the first liquid inlet pipes and the second liquid outlet pipes are respectively connected with the liquid collecting pipes, and all the second gas inlet pipes and the first gas outlet pipes are respectively connected with the gas collecting pipes.
Optionally, the heat exchanger further comprises a first row of heat exchange tubes and a second row of heat exchange tubes, the first row of heat exchange tubes is connected with the second row of heat exchange tubes through the first row of heat exchange tubes, and the second row of heat exchange tubes is connected with the third row of heat exchange tubes through the second row of heat exchange tubes.
Optionally, the flow cross section of each heat exchange unit is S-shaped.
The beneficial effect of this application does: the refrigerant flow direction is changed by arranging the refrigerant circulating pipe capable of being selectively opened and closed, so that the flow direction of the refrigerant on the heat exchanger is kept opposite to the wind direction, the heat exchange efficiency of the refrigerant is improved, and the energy efficiency of the heat exchanger is improved.
In addition, the heat exchanger of this scheme has first row of heat exchange tube, second row of heat exchange tube and third row of heat exchange tube, through parallel arrangement multirow heat exchange tube extension heat transfer route, can effectively improve the heat exchange rate.
Drawings
The present application will be described in further detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic flow diagram of a refrigerant in a cooling mode according to an embodiment of the bidirectional counter-flow heat exchange device for cooling and heating in this embodiment;
fig. 2 is a schematic flow direction diagram of a refrigerant in a heating mode of the bidirectional counter-flow heat exchange device for cooling and heating in fig. 1;
fig. 3 is a schematic flow diagram of a refrigerant in a cooling mode according to another embodiment of the bidirectional counter-flow heat exchange device for cooling and heating according to the present embodiment;
fig. 4 is a schematic flow direction diagram of a refrigerant in a heating mode of the bidirectional counter-flow heat exchange device for cooling and heating in fig. 3;
fig. 5 is a partial structural schematic diagram of the heat exchanger according to the present embodiment.
In the figure:
1. a heat exchanger; 11. a refrigerant inlet; 12. a refrigerant outlet; 13. a first row of heat exchange tubes; 14. a second row of heat exchange tubes; 15. a third row of heat exchange tubes; 16. a first horizontal row of heat exchange tubes; 17. a second horizontal row of heat exchange tubes; 2. a first liquid inlet pipe, 21 and a first control valve; 3. a second intake pipe; 31. a second control valve; 4. a first air outlet pipe; 41. a third control valve; 5. a second liquid outlet pipe; 51. a fourth control valve; 6. a liquid collecting pipe; 7. a gas collecting pipe.
Detailed Description
In order to make the technical problems solved, technical solutions adopted, and technical effects achieved by the present application clearer, the following describes technical solutions of embodiments of the present application in further detail, and it is obvious that the described embodiments are only a part of embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
In the description of the present application, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
As shown in fig. 1-2, the present embodiment provides a bidirectional countercurrent heat exchange device for refrigeration and heating, comprising:
the heat exchanger 1 is provided with a first row of heat exchange tubes 13, a second row of heat exchange tubes 14 and a third row of heat exchange tubes 15 which are arranged in parallel and sequentially communicated, the ports of the third row of heat exchange tubes 15 are refrigerant inlets 11, and the ports of the first row of heat exchange tubes 13 are refrigerant outlets 12; the heat exchanger 1 is provided with a first row of heat exchange tubes 13, a second row of heat exchange tubes 14 and a third row of heat exchange tubes 15, and the heat exchange path is prolonged by arranging a plurality of rows of heat exchange tubes in parallel, so that the heat exchange rate can be effectively improved;
the refrigerant circulating pipe comprises a first liquid inlet pipe 2, a second gas inlet pipe 3, a first gas outlet pipe 4 and a second liquid outlet pipe 5 which can be selectively opened and closed respectively, the first liquid inlet pipe 2 and the second gas inlet pipe 3 are connected with the refrigerant inlet 11 respectively, and the first gas outlet pipe 4 and the second liquid outlet pipe 5 are connected with the refrigerant outlet 12 respectively; specifically, a first liquid inlet pipe 2, a heat exchanger 1 and a first gas outlet pipe 4 form a first pipeline, and a second gas inlet pipe 3, the heat exchanger 1 and a second liquid outlet pipe 5 form a second pipeline; the refrigerant in the heat exchanger 1 in the first pipeline and the refrigerant in the second pipeline have the same flow direction, only the first pipeline is conducted during refrigeration, only the second pipeline is conducted during heating, and the refrigerant in the heat exchanger 1 can be unified in flow direction in two modes;
and the blower is used for driving airflow to blow through the heat exchanger 1, and the airflow is blown to the direction from the first row of heat exchange tubes 13 to the third row of heat exchange tubes 15. The refrigerant inlet 11 is located on the right side of the heat exchanger 1, and the refrigerant outlet 12 is located on the left side of the heat exchanger 1, so that the refrigerant in the heat exchanger 1 flows from right to left in the transverse flow direction, the air of the blower flows from left to right, and the flow direction is just opposite to the flow direction of the refrigerant in the heat exchanger 1, namely a counter-flow heat exchange structure is formed.
In order to realize the opening and closing control function of each gas pipe and liquid pipe, as one embodiment, the first liquid inlet pipe 2 is provided with a first control valve 21, the second gas inlet pipe 3 is provided with a second control valve 31, the first gas outlet pipe 4 is provided with a third control valve 41, the second liquid outlet pipe 5 is provided with a fourth control valve 51, and the opening and closing of each refrigerant circulating pipe are controlled by the first control valve 21, the second control valve 31, the third control valve 41 and the fourth control valve 51, respectively. That is, through set up the control valve respectively on each trachea and liquid pipe, alright realize controlling the break-make of individual trachea and liquid pipe easily, realize the function of this embodiment.
Alternatively, the first control valve 21 and the third control valve 41 are both check valves, and the flow direction of the first control valve 21 and the flow direction of the third control valve 41 are the same. That is, the first liquid inlet pipe 2 and the first gas outlet pipe 4 are respectively provided with a check valve, and the conduction direction of the check valve is the same as the flow direction of the refrigerant in the refrigeration mode, as shown in fig. 1, in the refrigeration mode, the refrigerant flows into the heat exchanger 1 from the first liquid inlet pipe 2 and then flows out from the first gas outlet pipe 4; and in the heating mode, the first control valve 21 and the third control valve 41 are respectively closed, and the first liquid inlet pipe 2 and the first gas outlet pipe 4 are both closed.
Further, the second control valve 31 and the fourth control valve 51 are both check valves, and the flow direction of the second control valve 31 and the flow direction of the fourth control valve 51 are the same and opposite to the flow direction of the first control valve 21. As shown in fig. 2, in the heating mode, the refrigerant flows into the heat exchanger 1 from the second inlet pipe 3 and then flows out from the second outlet pipe 5, while in the cooling mode, the second control valve 31 and the fourth control valve 51 are respectively closed, and both the second inlet pipe 3 and the second outlet pipe 5 are closed.
Therefore, the function of automatically controlling the one-way conduction can be realized by providing the first control valve 21, the second control valve 31, the third control valve 41 and the fourth control valve 51 as simple one-way valves, and the one-way valves have simple structures and low part costs.
It should be noted that, referring to fig. 1, when the refrigerant flows from the refrigerant outlet 12 to the second liquid outlet pipe 5 in the cooling mode, the pressure on the left side of the fourth control valve 51 is high, and the pressure on the right side is low, so that the refrigerant cannot flow back along the second liquid outlet pipe 5, and only flows out from the first gas outlet pipe 4. Similarly, referring to fig. 2, in the heating mode, when the refrigerant flows from the refrigerant outlet 12 and flows to the first outlet pipe 4 rightward, the refrigerant cannot flow back along the first outlet pipe 4 and only flows out from the second outlet pipe 5 because the pressure on the left side of the third control valve 41 is low and the pressure on the right side is high.
In another embodiment, the second control valve 31 and the fourth control valve 51 are both solenoid valves. That is, the present embodiment is combined with the above-described configuration in which both the first control valve 21 and the third control valve 41 are provided as check valves. The second control valve 31 and the fourth control valve 51 are set as electromagnetic valves, and the opening and closing of the second control valve and the fourth control valve can be controlled in an electric control mode.
In yet another embodiment, the first control valve 21, the second control valve 31, the third control valve 41 and the fourth control valve 51 are all solenoid valves. Similarly, the opening and closing of each solenoid valve is controlled based on the selection of the heating and cooling modes, and when the cooling mode is opened, the first control valve 21 and the third control valve 41 are opened, and the rest are closed; when the heating mode is turned on, the second control valve 31 and the fourth control valve 51 are opened, and the rest are closed. For the flow direction of the refrigerant in the two modes, reference may be made to the above-mentioned solution using check valve control, and the description thereof is omitted.
Further, this embodiment still includes collector tube 6 and collector tube 7, first feed liquor pipe 2 and second drain pipe 5 respectively with collector tube 6 is connected, second intake pipe 3 and first outlet duct 4 respectively with collector tube 7 is connected. Namely, each first liquid inlet pipe 2 and second liquid outlet pipe 5 share one liquid collecting pipe 6, and each second air inlet pipe 3 and first air outlet pipe 4 share one gas collecting pipe 7, so that the equipment structure is simplified, the equipment cost is saved, and the equipment maintenance difficulty is reduced.
As an implementation manner of this embodiment, referring to fig. 1-2, a plurality of heat exchange units arranged in sequence are arranged on the heat exchanger 1, and the first liquid inlet pipe 2, the second air inlet pipe 3, the first air outlet pipe 4, and the second liquid outlet pipe 5 are arranged on the heat exchange unit (an area near the side of the heat exchanger is easily frosted) on the heat exchanger 1, so that the flow direction of the refrigerant is changed, so that the flow direction of the refrigerant is opposite to the wind direction no matter refrigeration or heating, the heat exchange efficiency of the fin heat exchanger is improved, meanwhile, the defrosting can be performed reversely, and the frosting probability is reduced.
As another embodiment, referring to fig. 3 to 4, a plurality of heat exchange units are arranged side by side on the heat exchanger 1, each heat exchange unit is provided with the first row of heat exchange tubes 13, the second row of heat exchange tubes 14 and the third row of heat exchange tubes 15, and each heat exchange unit is connected with a group of the first liquid inlet tube 2, the second gas inlet tube 3, the first gas outlet tube 4 and the second liquid outlet tube 5; all the first liquid inlet pipes 2 and the second liquid outlet pipes 5 are respectively connected with the liquid collecting pipe 6, and all the second gas inlet pipes 3 and the first gas outlet pipes 4 are respectively connected with the gas collecting pipe 7. All heat exchange units in the mode can realize countercurrent heat exchange, and the heat exchange efficiency is higher.
Referring to fig. 5, for the specific structure of the heat exchanger 1, the heat exchanger 1 further includes a first row of heat exchange tubes 16 and a second row of heat exchange tubes 17, the first row of heat exchange tubes 13 is connected to the second row of heat exchange tubes 14 through the first row of heat exchange tubes 16, and the second row of heat exchange tubes 14 is connected to the third row of heat exchange tubes 15 through the second row of heat exchange tubes 17.
Preferably, the flow cross section of each heat exchange unit is S-shaped. The structure can form a plurality of rows of parallel heat exchange tubes under the condition of reducing the length of the heat exchange tubes to a greater extent, thereby saving the manufacturing materials and cost investment of equipment and realizing higher heat exchange efficiency.
In the description herein, it is to be understood that the terms "upper," "lower," "left," "right," and the like are used in an orientation or positional relationship merely for convenience in description and simplicity of operation, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the present application. Furthermore, the terms "first" and "second" are used merely for descriptive purposes and are not intended to have any special meaning.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be appropriately combined to form other embodiments as will be appreciated by those skilled in the art.
The technical principles of the present application have been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the present application and is not to be construed in any way as limiting the scope of the application. Based on the explanations herein, a person skilled in the art will be able to conceive of other embodiments of the present application without inventive effort, which shall fall within the scope of protection of the present application.
Claims (10)
1. The utility model provides a refrigeration heating two-way countercurrent flow heat transfer device which characterized in that includes:
the heat exchanger (1) is provided with a first row of heat exchange tubes (13), a second row of heat exchange tubes (14) and a third row of heat exchange tubes (15) which are arranged in parallel and sequentially communicated, the ports of the third row of heat exchange tubes (15) are refrigerant inlets (11), and the ports of the first row of heat exchange tubes (13) are refrigerant outlets (12);
the refrigerant circulating pipe comprises a first liquid inlet pipe (2), a second gas inlet pipe (3), a first gas outlet pipe (4) and a second liquid outlet pipe (5) which can be selectively opened and closed respectively, the first liquid inlet pipe (2) and the second gas inlet pipe (3) are connected with the refrigerant inlet (11) respectively, and the first gas outlet pipe (4) and the second liquid outlet pipe (5) are connected with the refrigerant outlet (12) respectively;
and the air blower is used for driving air flow to blow through the heat exchanger (1) and blow in the direction from the first row of heat exchange tubes (13) to the third row of heat exchange tubes (15).
2. The bidirectional countercurrent heat exchange device for cooling and heating according to claim 1, wherein the first liquid inlet pipe (2) is provided with a first control valve (21), the second gas inlet pipe (3) is provided with a second control valve (31), the first gas outlet pipe (4) is provided with a third control valve (41), and the second liquid outlet pipe (5) is provided with a fourth control valve (51), and the opening and closing of each refrigerant circulating pipe are controlled by the first control valve (21), the second control valve (31), the third control valve (41) and the fourth control valve (51), respectively.
3. The bi-directional countercurrent cooling and heating heat exchange device according to claim 2, wherein the first control valve (21) and the third control valve (41) are both check valves, and the flow direction of the first control valve (21) and the third control valve (41) is the same.
4. The bi-directional countercurrent cooling and heating heat exchange device according to claim 3, wherein the second control valve (31) and the fourth control valve (51) are both check valves, and the flow direction of the second control valve (31) and the flow direction of the fourth control valve (51) are the same and opposite to the flow direction of the first control valve (21).
5. The bi-directional counter-flow heat exchange device for cooling and heating as claimed in claim 3, wherein the second control valve (31) and the fourth control valve (51) are both solenoid valves.
6. The bi-directional counter-flow heat exchange device for cooling and heating as claimed in claim 2, wherein the first control valve (21), the second control valve (31), the third control valve (41) and the fourth control valve (51) are all solenoid valves.
7. The bidirectional countercurrent cooling and heating heat exchange device according to any one of claims 1 to 6, further comprising a liquid collecting pipe (6) and a gas collecting pipe (7), wherein the first liquid inlet pipe (2) and the second liquid outlet pipe (5) are respectively connected to the liquid collecting pipe (6), and the second gas inlet pipe (3) and the first gas outlet pipe (4) are respectively connected to the gas collecting pipe (7).
8. The bidirectional countercurrent cooling and heating heat exchange device according to claim 7, wherein the heat exchanger (1) is provided with a plurality of heat exchange units, each heat exchange unit is provided with the first row of heat exchange tubes (13), the second row of heat exchange tubes (14) and the third row of heat exchange tubes (15), and each heat exchange unit is connected with a group of the first liquid inlet tube (2), the second liquid inlet tube (3), the first gas outlet tube (4) and the second liquid outlet tube (5); all the first liquid inlet pipes (2) and the second liquid outlet pipes (5) are respectively connected with the liquid collecting pipes (6), and all the second gas inlet pipes (3) and the first gas outlet pipes (4) are respectively connected with the gas collecting pipes (7).
9. The bidirectional countercurrent heat exchange device for cooling and heating according to claim 8, characterized in that the heat exchanger (1) further comprises a first row of heat exchange tubes (16) and a second row of heat exchange tubes (17), the first row of heat exchange tubes (13) and the second row of heat exchange tubes (14) are connected through the first row of heat exchange tubes (16), and the second row of heat exchange tubes (14) and the third row of heat exchange tubes (15) are connected through the second row of heat exchange tubes (17).
10. The bi-directional countercurrent cooling and heating device as claimed in claim 9, wherein the cross-section of each heat exchange unit is S-shaped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122664351.0U CN216592326U (en) | 2021-11-01 | 2021-11-01 | Refrigeration and heating bidirectional countercurrent heat exchange device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122664351.0U CN216592326U (en) | 2021-11-01 | 2021-11-01 | Refrigeration and heating bidirectional countercurrent heat exchange device |
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| CN216592326U true CN216592326U (en) | 2022-05-24 |
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| CN202122664351.0U Active CN216592326U (en) | 2021-11-01 | 2021-11-01 | Refrigeration and heating bidirectional countercurrent heat exchange device |
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