Pipeline structure and heat pump device

Abstract

The utility model discloses a pipeline structure and a heat pump device, the pipeline structure is applied to the heat pump device, the heat pump device comprises a main plate heat exchanger, an enthalpy increasing plate heat exchanger and a finned heat exchanger, and the pipeline structure is used for being arranged among the main plate heat exchanger, the enthalpy increasing plate heat exchanger and the finned heat exchanger in a communicating mode. Medium circulation among the main plate heat exchanger, the enthalpy increasing plate heat exchanger and the finned heat exchanger is achieved. The pipeline structure comprises at least one arc-shaped pipeline and at least one linear pipeline, one linear pipeline arranged at the medium outflow end of one arc-shaped pipeline in a communicating mode is set as a target linear pipeline, and the length of the target linear pipeline is larger than or equal to 10 times of the pipe diameter of the target linear pipeline. According to the technical scheme, the technical problems that according to a pipeline structure of an existing heat pump device, gas-liquid two-state media are prone to entering the liquid separation head when not fully mixed, liquid separation is uneven, loop refrigerants with much separated liquid are not thoroughly evaporated, and the heating function of the heat pump device is affected can be effectively solved.

Description

Technical Field

[0001] This application relates to the technical field of heat pumps, and particularly to a pipeline structure and a heat pump device. Background Art

[0002] Currently, a heat pump device with an enthalpy-increasing unit mainly consists of a finned heat exchanger, a main heat exchanger, and an enthalpy-increasing plate heat exchanger. A pipeline structure is connected between the finned heat exchanger, the main heat exchanger, and the enthalpy-increasing plate heat exchanger to realize the medium circulation among the three, so as to complete the corresponding heating or cooling conditions. When in the heating condition, the high-temperature and high-pressure medium enters the enthalpy-increasing plate heat exchanger through the main heat exchanger and then becomes a gas-liquid two-phase medium, and then enters the multiple medium inlet pipes of the finned heat exchanger through the corresponding pipeline structure and a liquid distributor. Due to the limited installation space of the heat pump device, in the existing pipeline structure, most adopt a structure of an arc pipeline plus a straight pipeline. In this way, the gas-liquid two-phase medium needs to first pass through the bend of the arc pipeline and then enter the liquid distributor through the straight pipeline. During the process of the gas-liquid two-phase medium passing through the bend of the arc pipeline, due to the action of centrifugal force, the liquid medium will enter the straight pipeline along the large bend, while the gas medium will enter the straight pipeline along the small bend. At this time, it is easy to occur that the gas-liquid two-phase medium enters the liquid distributor without being fully mixed, which will lead to uneven liquid distribution, resulting in incomplete evaporation of the refrigerant in the loop with more liquid distribution, and further affecting the heating function of the heat pump device. Summary of the Utility Model

[0003] The embodiments of this application provide a pipeline structure and a heat pump device, aiming to improve the technical problem that in the pipeline structure of the existing heat pump device, the gas-liquid two-phase medium easily enters the liquid distributor without being fully mixed, which further leads to uneven liquid distribution, resulting in incomplete evaporation of the refrigerant in the loop with more liquid distribution and affecting the heating function of the heat pump device.

[0004] To this end, in the first aspect of the embodiments of this application, a pipeline structure is provided, which is applied in a heat pump device. The heat pump device includes a main heat exchanger, an enthalpy-increasing plate heat exchanger, and a finned heat exchanger. The pipeline structure is used to be connected between the main heat exchanger, the enthalpy-increasing plate heat exchanger, and the finned heat exchanger to realize the medium circulation among the main heat exchanger, the enthalpy-increasing plate heat exchanger, and the finned heat exchanger;

[0005] The pipeline structure includes at least one arc pipeline and at least one straight pipeline. One straight pipeline connected to the medium outlet end of one arc pipeline is set as the target straight pipeline, and the length of the target straight pipeline is greater than or equal to 10 times the diameter of the target straight pipeline.

[0006] Optionally, in some embodiments of the present application, a connection pipeline is provided between the target straight pipeline and the medium outflow end of the corresponding arc pipeline, and a part or all of the pipe diameter of the connection pipeline is smaller than the pipe diameter of the medium outflow end.

[0007] Optionally, in some embodiments of the present application, the connection pipeline has a first connection channel respectively adapted to communicate with the medium outflow end and the target straight pipeline, and at least one convex portion is arranged in the first connection channel, so that a part of the pipe diameter of the connection pipeline is smaller than the pipe diameter of the medium outflow end.

[0008] Optionally, in some embodiments of the present application, the convex portion is an annular convex portion, and the passing direction of the opening surrounded by the annular convex portion is the same as the flowing direction of the connection pipeline.

[0009] Optionally, in some embodiments of the present application, the convex portion is a spiral convex portion, and the spiral convex portion and the channel wall of the first connection channel jointly surround and form a first medium channel spirally extending along the extension direction of the first connection channel.

[0010] Optionally, in some embodiments of the present application, a plurality of convex portions are arranged in the first connection channel, and the plurality of convex portions are staggered and spaced apart in the extension direction of the first connection channel, so that a second medium channel bent and extending along the extension direction of the first connection channel is formed in the first connection channel.

[0011] Optionally, in some embodiments of the present application, the connection pipeline has a second connection channel respectively communicating with the medium outflow end and the target straight pipeline. The second connection channel includes a first transition connection section, a main channel section and a second transition connection section. The pipe diameter of the main channel section is smaller than the pipe diameters of the medium outflow end and the target straight pipeline. The first transition connection section is connected between the medium outflow end and the main channel section, and the pipe diameter of the first transition connection section gradually decreases along the direction from the medium outflow end to the main channel section. The second transition connection section is connected between the main channel section and the target straight pipeline, and the pipe diameter of the second transition connection section gradually increases along the direction from the main channel section to the target straight pipeline.

[0012] In addition, a second aspect of the embodiments of the present application provides a heat pump device, including a main heat exchanger, an enhanced enthalpy heat exchanger, a finned heat exchanger and the above pipeline structure. The pipeline structure is connected between the main heat exchanger, the enhanced enthalpy heat exchanger and the finned heat exchanger to realize the medium circulation between the main heat exchanger, the enhanced enthalpy heat exchanger and the finned heat exchanger.

[0013] Optionally, in some embodiments of the present application, a liquid distributor is further included. One end of the liquid distributor is respectively connected and arranged with a plurality of medium inlet pipes of the finned heat exchanger. The other end of the liquid distributor is provided with a target straight pipeline. The end of the target straight pipeline far from the corresponding arc pipeline is connected and arranged with the other end of the liquid distributor.

[0014] Optionally, in some embodiments of the present application, an enthalpy-increasing valve is further included. A target straight pipeline is arranged at the enthalpy-increasing inlet of the enthalpy-increasing plate heat exchanger. The end of the target straight pipeline far from the corresponding arc pipeline is connected and arranged with the enthalpy-increasing inlet. The end of the arc pipeline corresponding to the target straight pipeline far from the target straight pipeline is further connected and arranged with the medium outlet of the enthalpy-increasing plate heat exchanger through the enthalpy-increasing valve and the pipeline structure.

[0015] For the pipeline structure and the heat pump device provided by the technical solution of the present application, when the medium in the gas-liquid two-phase state passes through the turning of the arc pipeline, due to the action of centrifugal force, when the liquid medium enters the target straight pipeline along the large bend and the gas medium enters the target straight pipeline along the small bend, since the length of the target straight pipeline is greater than or equal to 10 times the diameter of the target straight pipeline, the target straight pipeline has sufficient length, so that the separated liquid medium and gas medium are fully mixed again before entering the liquid distributor. In this way, the situation of uneven liquid distribution can be effectively avoided to ensure the heating function of the heat pump device. It can be seen that this technical solution can effectively improve the technical problem that the pipeline structure of the existing heat pump device is prone to the situation that the medium in the gas-liquid two-phase state enters the liquid distributor without sufficient mixing, resulting in uneven liquid distribution, so that the refrigerant in the loop with more liquid distribution evaporates incompletely, affecting the heating function of the heat pump device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application. For those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0017] Figure 1 It is a schematic diagram of the main structure of the heat pump device according to the embodiment of the present application;

[0018] Figure 2 It is a schematic diagram of the enlarged structure of the partial Ⅰ of the heat pump device according to the embodiment of the present application;

[0019] Figure 3 It is a schematic diagram of the enlarged structure of the partial Ⅱ of the heat pump device according to the embodiment of the present application;

[0020] Figure 4 The first schematic cross-sectional structure diagram of the connecting pipeline of the heat pump device shown in Figure 2 ;

[0021] Figure 5 The second schematic cross-sectional structure diagram of the connecting pipeline of the heat pump device shown in Figure 2 ;

[0022] Figure 6 The third schematic cross-sectional structure diagram of the connecting pipeline of the heat pump device shown in Figure 2 ;

[0023] Explanation of the reference numerals in the drawings:

[0024] 100, heat pump device; 110, main plate heat exchanger; 120, enhanced enthalpy plate heat exchanger; 121, enhanced enthalpy inlet; 122, medium outlet; 130, finned heat exchanger; 140, pipeline structure; 141, arc pipeline; 142, target straight pipeline; 143, connecting pipeline; 1431, first connection channel; 1432, convex part; 1433, second connection channel; 14331, first transition connection section; 14332, main channel section; 14333, second transition connection section; 150, liquid distributor; 160, enhanced enthalpy valve; 170, main valve; 11, opening; 12, second medium channel.

[0025] The realization, functional features and advantages of the purpose of this application will be further described in conjunction with the embodiments with reference to the drawings. Specific embodiments

[0026] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present application.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present application are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0028] In addition, the descriptions involving "first", "second", etc. in this application are only for descriptive purposes, and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments may be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by this application.

[0029] In one embodiment, as Figures 1 to 3 shown, an embodiment of the present application provides a pipeline structure 140. The pipeline structure 140 includes at least one arc pipeline 141 and at least one straight pipeline. A straight pipeline connected to the medium outflow end of an arc pipeline 141 is set as a target straight pipeline 142, and the length of the target straight pipeline 142 is greater than or equal to 10 times the diameter of the target straight pipeline 142.

[0030] It can be understood that the pipeline structure 140 mentioned in the embodiment of the present application is mainly applied in a heat pump device 100. The heat pump device 100 is applied in the heat pump device 100. The heat pump device 100 includes a main heat exchanger 110, an enhanced enthalpy heat exchanger 120, and a finned heat exchanger 130. The pipeline structure 140 is used to connect the main heat exchanger 110, the enhanced enthalpy heat exchanger 120, and the finned heat exchanger 130 to realize the medium circulation between the main heat exchanger 110, the enhanced enthalpy heat exchanger 120, and the finned heat exchanger 130. That is, the specific quantity of the above-mentioned straight pipeline and arc pipeline 141 can be arbitrarily increased or decreased according to the actual connection requirements between the main heat exchanger 110, the enhanced enthalpy heat exchanger 120, and the finned heat exchanger 130. The above-mentioned annular pipeline is mainly used for transitional connection between a horizontally arranged straight pipeline and a vertically arranged straight pipeline to achieve a smooth transition between the two. The medium outflow end of the above-mentioned arc pipeline 141 specifically refers to the end of the arc pipeline 141 where the medium flows out during the heating process, that is, to ensure that under the heating condition, the medium first passes through the medium outflow end and then flows into the target straight pipeline 142.

[0031] In this way, in the pipeline structure 140 of the embodiment of the present application, through the above structural arrangement, when the medium in the gas-liquid two-phase state passes through the bend of the arc-shaped pipeline 141, due to the action of centrifugal force, when the liquid medium adheres to the large bend and enters the target straight pipeline 142, while the gaseous medium adheres to the small bend and enters the target straight pipeline 142, since the length of the target straight pipeline 142 is greater than or equal to 10 times the diameter of the target straight pipeline 142, the target straight pipeline 142 has sufficient length, so that the separated liquid medium and gaseous medium are fully mixed again before entering the liquid separation head 150. In this way, the situation of uneven liquid separation can be effectively avoided to ensure the heating function of the heat pump device 100.

[0032] In some examples, as Figures 1 to 3 shown, the target straight pipeline 142 and the medium outlet end of the corresponding arc-shaped pipeline 141 are connected through a connecting pipeline 143, and part or all of the diameter of the connecting pipeline 143 is smaller than the diameter of the medium outlet end. In this way, through the above structural arrangement, after the separated liquid medium and gaseous medium formed by the arc-shaped pipeline 141 flow out of the medium outlet end, they can be forced to be mixed again through the reduced diameter formed by part or all of the diameter of the connecting pipeline 143 becoming smaller (since the diameter of this section of the path decreases, it will cause the fluid pressure in this section to increase, thereby accelerating the mixing rate of the liquid medium and gaseous medium in this section of the path), and then enter the target straight pipeline 142 for stable mixing, so as to further ensure that the separated liquid medium and gaseous medium are fully mixed before entering the corresponding liquid separation head 150.

[0033] In some examples, as Figures 1 to 4 shown, the connecting pipeline 143 has a first connecting channel 1431 that is respectively adapted to communicate with the medium outlet end and the target straight pipeline 142, and at least one convex portion 1432 is arranged in the first connecting channel 1431, so that part of the diameter of the connecting pipeline 143 is smaller than the diameter of the medium outlet end. In this way, through the above structural arrangement, the diameter of the first connecting channel 1431 itself can be basically the same as the diameter of the medium outlet end and the diameter of the target straight pipeline 142 respectively, to ensure that the target straight pipeline 142 and the medium outlet end of the corresponding arc-shaped pipeline 141 can be stably connected through the connecting pipeline 143. At the same time, by arranging at least one convex portion 1432 protruding in the first connecting channel 1431, so that part of the diameter of the connecting pipeline 143 is smaller than the diameter of the medium outlet end, the purpose of the above-mentioned reduced diameter can be achieved while not affecting the above stable connection.

[0034] In some examples, as Figure 2 and Figure 4As shown, the convex portion 1432 can specifically be an annular convex portion, and the passing direction of the opening 11 surrounded by the annular convex portion 1432 is the same as the flowing direction of the connecting pipeline 143. In this way, through the above structural arrangement, when the separated liquid medium and gaseous medium pass through the first connection channel 1431, they will be forced to mix again first through the opening 11 surrounded by the annular convex portion 1432, and then enter the target straight pipeline 142 for stable mixing, thereby further ensuring that the separated liquid medium and gaseous medium are fully mixed before entering the corresponding liquid separation head 150.

[0035] In some examples, the convex portion 1432 can specifically be a spiral convex portion (not shown), and the spiral convex portion and the channel wall of the first connection channel 1431 jointly surround and form a first medium channel that spirally extends along the extension direction of the first connection channel 1431. In this way, through the above structural arrangement, when the separated liquid medium and gaseous medium pass through the first connection channel, they will pass through the first medium channel spirally for forced re-mixing, and then enter the target straight pipeline 142 for stable mixing, thereby further ensuring that the separated liquid medium and gaseous medium are fully mixed before entering the corresponding liquid separation head 150.

[0036] In some examples, such as Figure 2 and Figure 5 As shown, a plurality of convex portions 1432 are provided in the first connection channel 1431, and the plurality of convex portions 1432 are alternately and spaced apart in the extension direction of the first connection channel 1431, so that a second medium channel 12 that bends and extends along the extension direction of the first connection channel 1431 is formed in the first connection channel 1431. In this way, through the above structural arrangement, when the separated liquid medium and gaseous medium pass through the first connection channel 1431, they will pass through the second medium channel 12 in a bent manner for forced re-mixing, and then enter the target straight pipeline 142 for stable mixing, thereby further ensuring that the separated liquid medium and gaseous medium are fully mixed before entering the corresponding liquid separation head 150.

[0037] In some examples, such as Figure 2 and Figure 6As shown, the connecting pipeline 143 has a second connecting channel 1433 that respectively communicates with the medium outflow end and the target straight pipeline 142. The second connecting channel 1433 includes a first transition connecting section 14331, a main channel section 14332, and a second transition connecting section 14333. The diameter of the main channel section 14332 is smaller than the diameters of the medium outflow end and the target straight pipeline 142 (that is, the diameter of the main channel section 14332 is smaller than both the diameter of the medium outflow end and the diameter of the target straight pipeline 142). The first transition connecting section 14331 is communicatively arranged between the medium outflow end and the main channel section 14332, and the diameter of the first transition connecting section 14331 gradually decreases in the direction from the medium outflow end to the main channel section 14332. The second transition connecting section 14333 is communicatively arranged between the main channel section 14332 and the target straight pipeline 142, and the diameter of the second transition connecting section 14333 gradually increases in the direction from the main channel section 14332 to the target straight pipeline 142. Thus, through the above structural arrangement, when the separated liquid medium and gaseous medium pass through the second connecting channel 1433, they will be forced to mix again through the main channel section 14332 first, and then enter the target straight pipeline 142 for stable mixing, thereby further ensuring that the separated liquid medium and gaseous medium are fully mixed before entering the corresponding liquid separation head 150.

[0038] In one embodiment, as Figures 1 to 3 shown, an embodiment of the present application provides a heat pump device 100, which specifically may include a main heat exchanger 110, an enhanced enthalpy heat exchanger 120, a finned heat exchanger 130, and a pipeline structure 140. The pipeline structure 140 is communicatively arranged between the main heat exchanger 110, the enhanced enthalpy heat exchanger 120, and the finned heat exchanger 130 to realize the medium circulation between the main heat exchanger 110, the enhanced enthalpy heat exchanger 120, and the finned heat exchanger 130.

[0039] It can be understood that the pipeline structure 140 in the embodiment of the present application should specifically be the pipeline structure 140 in the above embodiment, that is, it has the same structure and function as the pipeline structure 140 in the above embodiment.

[0040] In this way, the heat pump device 100 of the present application has the same effective effects as the above embodiment of the pipeline structure 140 to ensure its good heating function.

[0041] In some examples, as Figure 1 and Figure 2As shown, the heat pump device 100 further includes a liquid distributor 150. One end of the liquid distributor 150 is respectively communicated with a plurality of medium inlet pipes of the finned heat exchanger 130. The other end of the liquid distributor 150 is provided with a target straight pipeline 142. The end of the target straight pipeline 142 away from the corresponding arc pipeline 141 is communicated with the other end of the liquid distributor 150. Thus, through the above structural arrangement, it can be ensured that the separated liquid medium and gas medium are fully mixed before entering the corresponding liquid distributor 150, so as to effectively avoid the uneven liquid distribution and ensure the heating function of the heat pump device 100.

[0042] In some examples, such as Figure 1 and Figure 3 As shown, the heat pump device 100 further includes an enthalpy-increasing valve 160. A target straight pipeline 142 is provided at the enthalpy-increasing inlet 121 of the enthalpy-increasing plate heat exchanger 120. The end of the target straight pipeline 142 away from the corresponding arc pipeline 141 is communicated with the enthalpy-increasing inlet 121. The end of the arc pipeline 141 corresponding to the target straight pipeline 142 away from the target straight pipeline 142 is also communicated with the medium outlet 122 of the enthalpy-increasing plate heat exchanger 120 through the enthalpy-increasing valve 160 and the pipeline structure 140. It can be understood that the medium flowing out from the medium outlet 122 of the enthalpy-increasing plate heat exchanger 120 will flow in two paths. One path flows through the main valve to the above-mentioned liquid distributor 150, and the other path flows back to the enthalpy-increasing plate heat exchanger 120 through the enthalpy-increasing valve 160. Thus, through the above structural arrangement, it can be ensured that the separated liquid medium and gas medium are fully mixed before stably entering the enthalpy-increasing plate heat exchanger 120 through the enthalpy-increasing inlet 121, so as to effectively avoid the problem that the heat exchange efficiency of the enthalpy-increasing plate heat exchanger 120 is affected due to the instability caused by the separation of the entering liquid medium and gas medium.

[0043] The above are only the preferred embodiments of the present application, and do not limit the patent scope of the present application. Any equivalent structural transformation made under the inventive concept of the present application using the content of the specification and drawings of the present application, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present application.

Claims

1. A pipeline structure, used in a heat pump device, characterized in that: The heat pump device comprises a main plate heat exchanger, an enthalpy increase plate heat exchanger and a fin heat exchanger, and the pipeline structure is used to communicate and be arranged between the main plate heat exchanger, the enthalpy increase plate heat exchanger and the fin heat exchanger, so as to realize the medium circulation among the main plate heat exchanger, the enthalpy increase plate heat exchanger and the fin heat exchanger; The pipeline structure includes at least one arc pipeline and at least one straight pipeline. One of the straight pipelines connected to the medium outflow end of one of the arc pipelines is set as a target straight pipeline, and the length of the target straight pipeline is greater than or equal to 10 times the diameter of the target straight pipeline.

2. The pipeline structure according to claim 1, characterized in that: The target straight pipeline is connected to the medium outflow end of the corresponding arc pipeline through a connecting pipeline, and a partial or full diameter of the connecting pipeline is smaller than the diameter of the medium outflow end.

3. The pipeline structure according to claim 2, characterized in that: The connecting pipeline has a first connecting channel adapted to connect the medium outflow end and the target linear pipeline respectively, and at least one protrusion is arranged in the first connecting channel, so that a partial diameter of the connecting pipeline is smaller than the diameter of the medium outflow end.

4. The pipeline structure according to claim 3, characterized in that: The protrusion is an annular protrusion, and the passing direction of the opening formed by the annular protrusion is the same as the flow direction of the connecting pipeline.

5. The pipeline structure according to claim 3, characterized in that: The protrusion is a spiral protrusion, and the spiral protrusion and the channel wall of the first connecting channel are jointly arranged to form a first medium channel extending in a spiral along the extending direction of the first connecting channel.

6. The pipeline structure according to claim 3, characterized in that: A plurality of protrusions are arranged in the first connecting channel, and the plurality of protrusions are distributed at staggered intervals in the extending direction of the first connecting channel, so that a second medium channel extending in a curved manner along the extending direction of the first connecting channel is formed in the first connecting channel.

7. The pipeline structure according to claim 2, characterized in that: The connecting pipeline has a second connecting channel respectively connecting the medium outflow end and the target straight pipeline, the second connecting channel includes a first transition connecting section, a main channel section and a second transition connecting section, the diameter of the main channel section is smaller than the diameter of the medium outflow end and the diameter of the target straight pipeline, the first transition connecting section is connected and arranged between the medium outflow end and the main channel section, and the diameter of the first transition connecting section is gradually reduced along the direction from the medium outflow end to the main channel section, the second transition connecting section is connected and arranged between the main channel section and the target straight pipeline, and the diameter of the second transition connecting section is gradually increased along the direction from the main channel section to the target straight pipeline.

8. A heat pump device, characterized in that: It includes a main plate heat exchanger, an enthalpy increase plate heat exchanger, a fin-type heat exchanger and a pipeline structure as described in any one of claims 1 to 7, wherein the pipeline structure is connected and arranged between the main plate heat exchanger, the enthalpy increase plate heat exchanger and the fin-type heat exchanger to realize medium circulation among the main plate heat exchanger, the enthalpy increase plate heat exchanger and the fin-type heat exchanger.

9. The heat pump device according to claim 8, characterized in that: It also includes a liquid separator head, one end of which is connected to multiple medium inlet pipes of the fin heat exchanger, and the other end of the liquid separator head is provided with a target straight pipeline. The end of the target straight pipeline away from the corresponding arc pipeline is connected to the other end of the liquid separator head.

10. The heat pump device according to claim 8, characterized in that It also includes an enthalpy increase valve, and a target straight pipeline is arranged at the enthalpy increase inlet of the enthalpy increase plate exchanger. The end of the target straight pipeline away from the corresponding arc pipeline is connected to the enthalpy increase inlet, and the end of the arc pipeline corresponding to the target straight pipeline away from the target straight pipeline is also connected to the medium outlet of the enthalpy increase plate exchanger through the enthalpy increase valve and the pipeline structure.

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