CN223896102U - Fan coil structure and air conditioning system - Google Patents

Abstract

The utility model provides a fan coil structure and an air conditioning system, wherein the fan coil structure comprises a coil water head structure, the coil water head structure comprises N headers and at least two liquid distribution pipes, at least two liquid distribution pipes positioned between two adjacent headers are used as a group of liquid distribution groups, two ends of the at least two liquid distribution pipes positioned in the same liquid distribution group are respectively communicated with the two adjacent headers, the N headers comprise an N-1 header and an N header which are adjacent, the liquid distribution group between the N-1 header and the N header is an N-1 liquid distribution group, the first header is communicated with a plurality of heat exchange coils for heat exchange, and the N header is communicated with an external pipeline for circulating heat exchange media. The utility model ensures that the heat exchange medium enters the N-1 header after being split by the plurality of liquid splitting pipes in the N-1 liquid splitting group, and the first header conveys the heat exchange medium into the plurality of heat exchange coils for heat exchange, thereby realizing N-1 times of split of the heat exchange medium and ensuring reasonable distribution of the heat exchange medium.

Description

Fan coil structure and air conditioning system

Technical Field

The utility model relates to the technical field of air conditioners, in particular to a fan coil structure and an air conditioning system.

Background

The air flowing through the outside of the coil is cooled by a heat exchange medium (such as coolant water) flowing in the surface cooler of the air conditioning system, the cooled air is driven by the fan to be sent to a place for refrigeration, the coolant water flows in the coil and flows back through a water return pipeline so as to bring the absorbed heat back to the refrigerating unit to release heat, the heat is sent back to the coil for heat absorption after being cooled, and the air flowing through the outside of the coil is cooled, so that the air is continuously circulated for refrigeration.

In the prior air conditioning system, a heat exchanger comprising a fan coil structure is a common heat exchange structure in the air conditioning system and plays a role of indoor temperature regulation, the fan coil structure generally mainly comprises a coil, a fan, a header pipe and other components, and the header pipe is used for distributing and collecting heat exchange media entering a plurality of coils arranged in parallel, so that the efficiency and the energy consumption of the equipment are directly related.

However, the existing fan coil structure generally adopts a claw-head water inlet mode (that is, a header is respectively communicated with a plurality of coils connected in parallel, and the header directly divides water into a plurality of coils) at the water inlet position to distribute water flow, and the existing claw-head water inlet mode has a certain limitation on water flow distribution, for example, the existing claw-head water inlet mode does not uniformly distribute water flow in a plurality of coils connected in parallel, so that the heat dissipation performance of an internal pipeline of a heat exchanger cannot be fully exerted, and further the heat exchange performance of the fan coil structure and the heat exchanger can be directly reduced.

Disclosure of utility model

The utility model provides a fan coil structure and an air conditioning system, which are used for solving the problem that the claw-head type water inlet mode in the prior art is uneven in water flow distribution, so that the heat exchange performance of the fan coil structure is reduced.

In order to solve the problems, according to one aspect of the utility model, a fan coil structure is provided, and comprises a coil head structure, wherein the coil head structure comprises N headers and at least two liquid distribution pipes, N is larger than or equal to 2, N is a positive integer, at least two liquid distribution pipes positioned between two adjacent headers are used as a group of liquid distribution pipes to form an N-1 group of liquid distribution pipes, two ends of at least two liquid distribution pipes positioned in the same group of liquid distribution pipes are respectively communicated with the two adjacent headers, the N headers comprise an N-1 header and an N header which are adjacent, the liquid distribution pipes between the N-1 header and the N header are N-1-th liquid distribution pipes, a first header is communicated with a plurality of heat exchange coils for heat exchange, the N header is communicated with an external pipeline for circulating a heat exchange medium, wherein the N header, the N-1 header, the N-2 header, the second header and the first header are sequentially communicated through the liquid distribution pipes, the heat exchange medium flows in from the N header, flows into the N-1 header after being divided into the N-1 header through at least two liquid distribution pipes in the N-1-th liquid distribution pipe, and the heat exchange medium is conveyed into the plurality of heat exchange pipes.

Further, in the first liquid separation group, the central axis of the liquid separation pipe and the central axes of the first collecting pipe and the second collecting pipe are respectively provided with an included angle, and/or when N is more than 2, the communication position of at least one liquid separation pipe in the N-1 liquid separation group and the N-1 collecting pipe is closer to the middle part of the N-1 collecting pipe than the communication position of at least one liquid separation pipe in the N-2 liquid separation group and the N-1 collecting pipe.

Further, when N is 2, the second header is communicated with an external pipeline, two ends of the liquid dividing pipe are respectively communicated with the first header and the second header, at least two liquid dividing pipes are arranged at intervals along the axial direction of the second header, and heat exchange medium flows into the second header, and flows into the first header after being divided by the at least two liquid dividing pipes.

Further, when N is 2 and the first external pipeline is communicated with the second header, the communication position between the external pipeline closest to one end of the second header and the second header is a first position, the communication position between two adjacent liquid dividing pipes closest to the other end of the second header and the second header is a second position, in the axial direction of the second header, the communication positions between two adjacent liquid dividing pipes closest to the second header and the second header are respectively a third position and a fourth position, so that the heat exchange medium flows from the middle part of the second header to two ends of the second header after diffusion, when N is 2 and the plurality of external pipelines are communicated with the second header, the communication position between the external pipeline closest to one end of the second header and the second header is a first position, the communication position between the external pipeline closest to the other end of the second header and the second header is a second position, in the first liquid dividing group, the communication position between the two adjacent liquid dividing pipes closest to the second header and the second header is a third position and the fourth position, the communication position between the two adjacent liquid dividing pipes closest to the second header and the second header is a second position, the second liquid dividing pipe closest to the second header is a second position, the communication position between the two adjacent liquid dividing pipes closest to the second header and the second header is a third position, so that the heat exchange medium flows from the middle part of the second header to the two ends in a diffusion way and then enters the first header.

Further, along the axial direction of the first header, the communication position between the liquid dividing pipe closest to one end of the first header and the first header is a fifth position, the communication position between the liquid dividing pipe closest to the other end of the first header and the first header is a sixth position, the communication positions between two adjacent heat exchange coils closest to the middle part of the first header and the first header are respectively a seventh position and an eighth position, and the fifth position and/or the sixth position are positioned between the seventh position and the eighth position so that heat exchange medium flows from the middle part of the first header to two ends in a diffusion way and then enters the heat exchange coils.

Further, the internal volume of the N-th header is taken as the N-th volume, the sum of the volumes from the N-th header to the first header is taken as the liquid separating volume, the N-th volume is larger than or equal to the liquid separating volume, and/or the ratio of the internal diameter of the N-th header to the internal diameter of the N-th header is in the range of 1.5-2, and/or the axial length of the N-th header is larger than the axial length of the N-th header, and the two ends of the N-th header in the axial direction are positioned between the two ends of the N-th header in the axial direction.

Further, the fan coil structure also comprises a driving fan and a plurality of heat exchange coils for heat exchange, and the driving fan drives airflow to flow through the heat exchange coils so as to enable the airflow to perform convection heat exchange with the heat exchange coils.

Further, the fan is driven to drive airflow to flow to form an airflow wind field, the airflow wind field comprises adjacent airflow dense areas and airflow loose areas, the airflow density in the airflow dense areas is larger than that in the airflow loose areas, and the number of the heat exchange coils arranged in the airflow dense areas is larger than that in the airflow loose areas.

The fan coil structure further comprises a shell, a heat exchange cavity is formed in the shell, an air inlet communicated with the heat exchange cavity is formed in the shell, the driving fan is arranged on the shell and is communicated with the air inlet to drive air flow to enter the heat exchange cavity from the air inlet, the coil water head structure is located outside the heat exchange cavity, and at least one part of the heat exchange coil is located in the heat exchange cavity.

The heat exchange coil comprises a plurality of communicated flat pipes, wherein the central axes of the plurality of flat pipes are arranged in parallel, the central axes of the flat pipes are perpendicular to the air outlet direction of the driving fan, the plurality of flat pipes, the airflow wind field and the air inlet are respectively projected to a projection plane perpendicular to the air outlet direction along the air outlet direction of the driving fan, at least one part of the projection of the air inlet is positioned in the projection of the airflow wind field, the superposition part of the projection of the air inlet and the airflow wind field is taken as a first area, the projection of the airflow wind field excluding the first area is taken as a second area, the part of the airflow wind field excluding the projection is taken as a third area, the number of the flat pipes in the first area is the first number, the number in the second area is the second number, the number in the third area is the third number, and the first number is larger than the second number and the second number is larger than or equal to the third number.

Further, the first number: the second number: the third number=4:3:2, or the first number: the second number: the third number=4:2:2.

The heat exchange device comprises a plurality of flat pipes, a plurality of heat exchange groups and at least one part of projection planes, wherein the flat pipes form a plurality of groups of heat exchange groups, central axes of the flat pipes in the same heat exchange group are arranged in a coplanar mode, the heat exchange groups are arranged at intervals along the air outlet direction, at least one part of flat pipes in the same heat exchange group are arranged in parallel, and at least one part of projections of the different heat exchange groups along the air outlet direction to the projection planes coincide.

Further, the coil head structure is a plurality of, and each coil head structure is connected with at least one heat exchange group.

Further, the plurality of driving fans are arranged at intervals along the axial direction of the straight pipe, the plurality of air inlets are arranged, and the plurality of air inlets are arranged in one-to-one correspondence with the plurality of driving fans.

According to another aspect of the present utility model, there is provided an air conditioning system comprising the fan coil structure described above.

The utility model provides a fan coil structure, which comprises a coil head structure, wherein the coil head structure comprises N headers and at least two liquid distribution pipes, N is more than or equal to 2 and is a positive integer, at least two liquid distribution pipes positioned between two adjacent headers are used as a group of liquid distribution pipes to form an N-1 group of liquid distribution pipes, two ends of at least two liquid distribution pipes positioned in the same group of liquid distribution pipes are respectively communicated with the two adjacent headers, the N headers comprise an N-1 header and an N header which are adjacent, the liquid distribution pipes between the N-1 header and the N header are the N-1 header, the first header is communicated with a plurality of heat exchange coils for heat exchange, the N header is communicated with an external pipeline for circulating heat exchange media, wherein the N header, the N-1 header, the N-2 header, the second header and the first header are sequentially communicated through the liquid distribution pipes, the heat exchange media flow from the N header, flow into the N-1 header after being divided by the at least two liquid distribution pipes in the N-1 header, and then flow into the N-1 header, and the heat exchange media are conveyed into the plurality of heat exchange coils.

According to the utility model, at least N headers and at least two liquid distribution pipes are arranged to work cooperatively, so that a heat exchange medium flows in from the N header, flows into the N-1 header after being distributed by a plurality of liquid distribution pipes in the N-1 liquid distribution group, and flows into the first header after being distributed by the liquid distribution pipes in the first liquid distribution group, and the first header conveys the heat exchange medium into a plurality of heat exchange coils for heat exchange, thereby realizing N-1 times of distribution of the heat exchange medium and further ensuring reasonable distribution of the heat exchange medium; compared with the prior art that the claw-head type water inlet mode is adopted to distribute water flow, the coil water head structure provided by the utility model overcomes the limitation of the prior claw-head type water inlet mode in water flow distribution, realizes uniform distribution of heat exchange medium flow in a plurality of heat exchange coils which are arranged in parallel, ensures that the heat exchange coils can fully exert heat dissipation performance, further can directly improve the heat exchange performance of the fan coil structure, simultaneously improves the working efficiency of a subsequent air conditioning system and effectively reduces energy consumption, can uniformly distribute flow without arranging additional electric valves and other devices to perform flow distribution control of the heat exchange medium, ensures that each heat exchange coil loop can operate in a better state, further, the fan coil structure provided by the utility model is beneficial to realizing pressure drop of the heat exchange medium, further improves the stability and the working reliability of the air conditioning system, optimizes the water head structure, remarkably improves the heat exchange efficiency and the operation stability of the heat exchanger comprising the fan coil structure, can realize uniform distribution of circulating water flow, effectively avoids local overheat or supercooling phenomena, the utility model has simple structure and low cost, is convenient for assembly and subsequent maintenance, has wide application prospect and is suitable for large-scale popularization and use.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the utility model. In the drawings:

FIG. 1 illustrates a schematic exterior structural view of a fan coil structure provided by an embodiment of the present utility model;

FIG. 2 illustrates an enlarged partial schematic view of the exterior structure of a fan coil structure provided by an embodiment of the present utility model;

FIG. 3 illustrates a partial schematic diagram of a fan coil structure including two headers in a side view provided by an embodiment of the present utility model;

FIG. 4 illustrates a partial schematic diagram of a fan coil structure including four headers in a side view provided by an embodiment of the present utility model;

FIG. 5 is a schematic view showing a portion of a structure of a plurality of flat tubes projected in a projection plane according to a first embodiment of the present utility model;

fig. 6 is a schematic view showing a part of the structure of a projection of a plurality of flat tubes in a projection plane according to the second embodiment of the present utility model.

Wherein the above figures include the following reference numerals:

10. first header, 11, fifth position, 12, sixth position, 13, seventh position, 14, eighth position;

20. A second header;

30. The liquid separating pipe comprises a liquid separating pipe body, a liquid separating pipe body and a liquid separating pipe body, wherein the liquid separating pipe body comprises a first liquid separating group, a second liquid separating group and a third liquid separating group;

40. a third header;

50. a fourth header;

60. a heat exchange coil, 61, a straight tube;

70. An external pipeline;

80. driving a fan;

90. A housing;

101. First area, 102, second area, 103, third area.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the utility model, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in FIGS. 1-6, the embodiment of the utility model provides a fan coil structure, which comprises a coil head structure, wherein the coil head structure comprises N headers and at least two liquid distribution pipes 30, N is larger than or equal to 2 and N is a positive integer, the at least two liquid distribution pipes 30 between the adjacent two headers are used as a group of liquid distribution pipes to form an N-1 group of liquid distribution pipes, two ends of the at least two liquid distribution pipes 30 in the same group of liquid distribution pipes are respectively communicated with the adjacent two headers, the N headers comprise an N-1 header and an N header which are adjacent, the liquid distribution group between the N-1 header and the N header is an N-1 header, the first header 10 is communicated with a plurality of heat exchange coils 60 for exchanging heat, the N header is communicated with an external pipeline 70 for circulating heat exchange media, wherein the N header, the N-1 header, the N-2 header, the second header 20 and the first header 10 are sequentially communicated through the liquid distribution pipes 30, the heat exchange media flows in from the N header, flows into the N-1 header through the at least two liquid distribution pipes in the N-1 header, and the heat exchange media is transferred into the N-1 header 10 after passing through the at least two liquid distribution pipes in the N-1 header.

According to the utility model, at least N headers and at least two liquid distribution pipes 30 are arranged to work cooperatively, so that a heat exchange medium flows in from the N header, flows into the N-1 header after being distributed by a plurality of liquid distribution pipes 30 in the N-1 liquid distribution group, and flows into the first header 10 after being distributed by the liquid distribution pipes 30 in the first liquid distribution group 31, and the first header 10 conveys the heat exchange medium into a plurality of heat exchange coils 60 for heat exchange, thereby realizing N-1 times of distribution of the heat exchange medium and further ensuring reasonable distribution of the heat exchange medium; compared with the prior art that the claw-head type water inlet mode is adopted to distribute water flow, the coil water head structure provided by the utility model overcomes the limitation of the prior claw-head type water inlet mode in water flow distribution, realizes the uniform distribution of heat exchange medium flow in a plurality of heat exchange coils 60 which are arranged in parallel, ensures that the heat exchange coils 60 can fully exert the heat dissipation performance, further can directly improve the heat exchange performance of the fan coil structure, simultaneously improves the working efficiency of a subsequent air conditioning system and effectively reduces the energy consumption, can ensure that the flow distribution is uniform without arranging additional electric valves and other devices to perform the flow distribution control of the heat exchange medium, ensures that each heat exchange coil 60 loop can operate in a better state, further, the fan coil structure provided by the utility model is beneficial to realizing the pressure drop of the heat exchange medium, further improves the stability and the working reliability of the air conditioning system, optimizes the water head structure, remarkably improves the heat exchange efficiency and the operation stability of the heat exchanger comprising the fan coil structure, can realize the uniform distribution of circulating water flow, effectively avoids the phenomenon of local overheat or supercooling, the utility model has simple structure and low cost, is convenient for assembly and subsequent maintenance, has wide application prospect and is suitable for large-scale popularization and use.

It should be noted that, in one embodiment of the present utility model, as shown in fig. 4, n=4, 4 headers include a first header 10, a second header 20, a third header 40 and a fourth header 50 which are sequentially adjacent, a plurality of liquid dividing pipes 30 between two adjacent headers are formed into a group of liquid dividing groups, which are respectively a first liquid dividing group 31, a second liquid dividing group 32 and a third liquid dividing group 33, each of the liquid dividing groups includes four liquid dividing pipes 30, the first header 10 is communicated with a plurality of heat exchange coils 60 for heat exchange, the fourth header 50 is communicated with an external pipeline 70 for circulating a heat exchange medium, wherein the heat exchange medium flows into the fourth header 50 through the external pipeline 70, flows into the third header 40 after being divided by the four liquid dividing pipes 30 in the third liquid dividing group 33, flows into the second header 20 after being divided by the four liquid dividing pipes 30 in the second liquid dividing group 32, and flows into the first header 10 after being divided by the four liquid dividing pipes 30 in the first liquid dividing group 31, and then flows into the first header 10, and the fourth header 50 is conveyed into the plurality of heat exchange coils 60 for heat exchange medium.

As shown in fig. 1, 2, 3 and 4, in the first liquid separation group 31, the central axis of the liquid separation pipe 30 forms an included angle with the central axes of the first header 10 and the second header 20.

By arranging the included angle between the central axes of the liquid separating pipes 30 in the first liquid separating group 31 and the central axes of the first collecting pipe 10 and the second collecting pipe 20, the uniformity of fluid distribution is improved, the heat exchange efficiency is further improved, and the heat exchange medium can be filled in the first collecting pipe 10 and the second collecting pipe 20 as much as possible due to the included angle, so that the distribution uniformity of the heat exchange medium is improved.

In one embodiment of the present utility model, the central axis of the first header 10 is parallel to the central axis of the second header 20, and the central axis of the first header 10 is perpendicular to the central axis of the liquid separation tube 30.

When N >2, the communication position of at least one of the liquid separation pipes 30 in the N-1 th liquid separation group with the N-1 th header is closer to the middle of the N-1 th header than the communication position of at least one of the liquid separation pipes 30 in the N-2 th liquid separation group with the N-1 th header.

By setting the communication position between the liquid distribution pipe 30 and the header pipe in each liquid distribution group, the distribution of the heat exchange medium in the header pipe can be controlled, and the heat exchange medium is promoted to flow from the middle part to the two ends of the header pipe in a diffusion way, so that the uniformity of the flow rate of the heat exchange medium in each heat exchange coil pipe 60 is ensured, the heat exchange efficiency is improved, and the effective pressure drop of the heat exchange medium in the heat exchange coil pipe 60 is realized.

As shown in fig. 1, 2 and 3, when N is 2, the second header 20 is communicated with the external pipe 70, both ends of the liquid dividing pipe 30 are respectively communicated with the first header 10 and the second header 20, at least two liquid dividing pipes 30 are arranged at intervals along the axial direction of the second header 20, and a heat exchange medium flows into the second header 20, is divided by the at least two liquid dividing pipes 30 and then enters the first header 10.

When N is equal to 2, the communication of the second header 20 with the external piping 70 ensures that the flow of the heat exchange medium (e.g., water) from the second header 20 to the first header 10 is uniformly distributed, improving heat exchange performance, and in addition, the above-described design reduces flow resistance in the water head structure, improves the efficiency of circulation of the heat exchange medium, and makes the structure easier to manufacture and maintain while making it easier.

When N is 2 and one external pipe 70 communicates with the second header 20, the communication position of the second header 20 and the external pipe 70 is the first position, as shown in fig. 1, 2, 3 and 4; the communication positions of two adjacent liquid dividing pipes 30 closest to the middle part of the second header 20 and the second header 20 along the axial direction of the second header 20 are a third position and a fourth position respectively, and the first position is positioned between the third position and the fourth position so that the heat exchange medium flows from the middle part of the second header 20 to two ends in a diffusion way and then enters the first header 10; in the case where N is 2 and the plurality of external pipes 70 are in communication with the second header 20, the position of communication between the external pipe 70 closest to one end of the second header 20 and the second header 20 in the axial direction of the second header 20 is a first position, the position of communication between the external pipe 70 closest to the other end of the second header 20 and the second header 20 in the axial direction of the second header 20 in the first liquid separation group 31 is a second position, the position of communication between two adjacent liquid separation pipes 30 closest to the middle of the second header 20 in the axial direction of the second header 20 in the second liquid separation group 31 is a third position and a fourth position, respectively, the first position and the second position are both located between the third position and the fourth position, so that the heat exchange medium flows from the middle of the second header 20 to both ends after being diffused into the first header 10, as shown in FIG. 4, the position of communication between the liquid separation pipe 30 closest to one end of the second header 20 and the second header 20 in the axial direction of the second header 20 in the second liquid separation group 32 in the axial direction of the second header 20 in the second header 32 in the case where N >2, the position of the liquid separation pipe 30 closest to the other end of the second header 20 in the second liquid separation group 31 is the second header 20, the communication positions between the two adjacent liquid distribution pipes 30 closest to the middle of the second header 20 and the second header 20 are a third position and a fourth position, respectively, and the first position and the second position are both located between the third position and the fourth position, so that the heat exchange medium flows from the middle of the second header 20 to both ends in a diffusion manner and then enters the first header 10.

For the cases that N is equal to 2 and N is greater than 2, the distribution of the heat exchange medium in the header can be controlled by precisely positioning the communication position between the liquid distribution pipe 30 and the header, and the diffusion flow of the heat exchange medium from the middle part of the second header 20 to the two ends is promoted, so that the uniformity of the flow rate of the heat exchange medium in each heat exchange coil 60 is ensured, the heat exchange efficiency is improved, and the effective pressure drop of the heat exchange medium in the heat exchange coil 60 is realized.

As shown in fig. 3, in the axial direction of the first header 10, the communication position between the liquid dividing pipe 30 closest to one end of the first header 10 and the first header 10 is a fifth position 11, the communication position between the liquid dividing pipe 30 closest to the other end of the first header 10 and the first header 10 is a sixth position 12, the communication positions between two adjacent heat exchange coils 60 closest to the middle part of the first header 10 and the first header 10 are a seventh position 13 and an eighth position 14, respectively, and the fifth position 11 and/or the sixth position 12 are located between the seventh position 13 and the eighth position 14, so that the heat exchange medium flows from the middle part of the first header 10 to both ends in a diffusion manner and then enters the heat exchange coils 60.

By setting the communication position of the liquid dividing pipe 30 and the first header 10 in the first header 10, the heat exchange medium can be ensured to flow from the middle part of the first header 10 to the two ends in a diffusion way, so that not only is the flow distribution uniformity ensured, but also the heat exchange efficiency of the heat exchange coil 60 positioned in the middle part of the heat exchange cavity is improved.

Specifically, the internal volume of the N-th header is taken as the N-th volume, the sum of the volumes from the N-th header to the first header 10 is taken as the liquid separating volume, the N-th volume is larger than or equal to the liquid separating volume, and/or the ratio of the internal diameter of the N-th header to the internal diameter of the N-th header is in the range of 1.5-2, and/or the axial length of the N-th header is larger than the axial length of the N-th header, and the two ends of the N-th header in the axial direction are positioned between the two ends of the N-1-th header in the axial direction.

By setting the volume, diameter ratio and length of the nth header, more efficient water flow distribution can be achieved, and this design helps control fluid pressure and flow, thereby improving heat exchange performance, and at the same time, energy consumption can be reduced as no additional electrically operated valve elements are required to regulate flow.

As shown in fig. 1 and 2, the fan coil structure further includes a drive fan 80 and a plurality of heat exchange coils 60 for heat exchange, the drive fan 80 driving the air flow through the heat exchange coils 60 to cause the air flow to convect with the heat exchange coils 60.

The fan coil structure provided by the utility model, combined with the coil water head structure, the driving fan 80 and the plurality of heat exchange coils 60, can more effectively utilize air flow to perform convection heat exchange, and improves the heat exchange efficiency and the energy utilization efficiency.

Specifically, the driving fan 80 drives the airflow to flow to form an airflow wind field, wherein the airflow wind field comprises adjacent airflow dense areas and airflow loose areas, the airflow density in the airflow dense areas is greater than the airflow density in the airflow loose areas, and the arrangement number of the heat exchange coils 60 in the airflow dense areas is greater than the arrangement number in the airflow loose areas.

Through the optimal design aiming at the airflow wind field, the reasonable arrangement of the heat exchange coils 60 in the airflow dense region and the airflow loose region is ensured, so that the arrangement quantity of the heat exchange coils 60 in the airflow dense region is increased, the heat exchange efficiency in a high air volume region is improved, and the design ensures that the whole heat exchange capacity of the equipment is improved under the condition that extra energy consumption is not increased.

As shown in fig. 1 and 2, the fan coil structure further comprises a shell 90, a heat exchange cavity is formed in the shell 90, an air inlet communicated with the heat exchange cavity is formed in the shell 90, a driving fan 80 is arranged on the shell 90 and communicated with the air inlet to drive air flow from the air inlet into the heat exchange cavity, wherein the coil water head structure is located outside the heat exchange cavity, and at least one part of the heat exchange coil 60 is located in the heat exchange cavity.

Through setting up the intercommunication of air intake and the drive fan 80 on the casing 90, optimized the flow path of air current, improved the homogeneity of air current distribution to further promoted heat exchange efficiency, this kind of design has still simplified fan coil structure, has improved follow-up fan coil structure and has installed and the convenience of maintaining in air conditioning system.

As shown in fig. 1, 2, 5 and 6, the heat exchange coil 60 includes a plurality of communicated straight pipes 61, the central axes of the plurality of straight pipes 61 are arranged in parallel, the central axes of the plurality of straight pipes 61 are perpendicular to the air outlet direction of the driving fan 80, the plurality of straight pipes 61, the airflow wind field and the air inlet are respectively projected to a projection plane perpendicular to the air outlet direction along the air outlet direction of the driving fan 80, at least a part of the projection of the air inlet is positioned in the projection of the airflow wind field, in the projection plane, a superposition part of the projection of the air inlet and the airflow wind field is taken as a first area 101, a projection of the airflow wind field excluding the first area 101 is taken as a second area 102, a part of the airflow wind field excluding the projection is taken as a third area 103, the number of the straight pipes 61 in the first area 101 is taken as a first number, the number in the second area 102 is taken as a second number, and the number in the third area 103 is greater than the second number.

The layout design of the straight pipes 61 ensures effective heat exchange between the air flow dense area and the straight pipes 61, and simultaneously optimizes the heat exchange performance of the whole equipment through overlapping and quantity control on a projection plane, and the design also utilizes the natural distribution rule of air flow, thereby improving the overall energy efficiency.

The first number: second number: third number=4:3:2 as shown in fig. 5, or the first number: second number: third number=4:2:2 as shown in fig. 6.

The number of the flat tubes 61 in the first area 101 is the largest, the number of the flat tubes 61 in the second area 102 is the smallest, and the third area 103 is the smallest, so that the heat exchange capacity of the high air volume area is fully utilized, the heat exchange requirement of the low air volume area is considered, and the overall heat exchange effect is improved.

In a specific embodiment of the present utility model, in practical application, the number of the pipes may be decreased by adopting an arithmetic progression manner, as shown in fig. 5 and fig. 6, along the direction pointing out of the second area 102 in the first area 101 and/or along the direction pointing out of the third area 103 in the second area 102, and the number of the flat pipes 61 is decreased by using the decreasing rule of the arithmetic progression, so that the number of the flat pipes 61 is changed to correspond to the change rule of the airflow in the airflow field, thereby improving the overall heat exchange efficiency.

In addition, it should be noted that the heat exchange coil 60 in the utility model is wound in a serpentine manner to increase the heat exchange area and improve the heat exchange efficiency, and comprises a technical scheme in which a part of the plurality of flat tubes 61 in the heat exchange coil 60 are connected in series, and a technical scheme in which a part of the plurality of flat tubes 61 are connected in parallel, and the specific embodiments are as follows:

1. the technical scheme that a plurality of flat pipes 61 are connected in series is as follows:

The plurality of flat pipes 61 form a multistage tandem structure; a part of the heat exchange coil 60 is formed by connecting a plurality of flat straight pipes 61 in series, and two ends of each flat straight pipe 61 are respectively connected through bent pipes to form a serpentine coiled structure; the series arrangement increases the path length of the fluid, thereby increasing the surface area of the heat exchange and improving the heat exchange efficiency, the plurality of series-connected flat tubes 61 form a circulation path, through which the fluid is directed through each set of flat tubes 61 of the heat exchange coil 60 in a carefully designed series path, forming a continuous circulation path, which ensures uniform distribution of the heat exchange medium, and in an air conditioning system, ensures that the fluid passes through each heat exchange coil 60, thereby optimizing the heat exchange performance of the overall system;

The plurality of flat pipes 61 form a zoned series structure, the plurality of flat pipes 61 positioned in the same zone are connected in series, the plurality of flat pipes 61 in different zones are connected in parallel, and the design can be designed that the number of the series connection among the plurality of flat pipes 61 is larger in the air flow dense zone, and the number of the series connection in the air flow loose zone is smaller, so that the design can provide more heat exchange area in the high air volume zone, and reduce the number of the heat exchange coils 60 in the low air volume zone, thereby balancing the heat exchange efficiency and the pressure drop of the whole heat exchanger.

2. The technical scheme that a plurality of flat pipes 61 are connected in parallel is as follows:

the design ensures that the plurality of flat pipes 61 in the same heat exchange group are arranged in parallel, the parallel grouping can realize quick distribution of fluid, improve the heat exchange efficiency and reduce the pressure drop of the whole system, and the heat exchange efficiency of the heat exchange coil 60 can be optimized by controlling the pressure and the flow rate of the fluid on each parallel path in the parallel grouping design;

In addition, the number of the straight pipes 61 in the air-flow dense area is the largest, the number of the straight pipes in the air-flow loose area is the smallest, and the number of the air-flow loose area is the smallest, and the parallel structure arranged in the subareas can ensure the rapid heat exchange of the fluid in the high air volume area, and simultaneously reduce the number of the heat exchange coils 60 in the air-flow loose area, so that the system performance and the energy efficiency are balanced;

Through the detailed description of the embodiment, the specific winding mode of the heat exchange coil 60 can be obtained, no matter the structure of connecting a plurality of flat pipes 61 in series or in parallel is adopted, the heat exchange area can be effectively increased, the heat exchange efficiency is improved, meanwhile, the layout of the heat exchange coil 60 is optimized according to the air flow distribution, the performance and the energy efficiency of the system are balanced, and of course, in practical application, the structure of connecting a plurality of flat pipes 61 in series or in parallel can be combined and adjusted according to specific heat exchange requirements, so that the optimized heat exchange effect is realized.

As shown in fig. 5 and 6, the plurality of flat pipes 61 form a plurality of groups of heat exchange groups, central axes of the plurality of flat pipes 61 in the same heat exchange group are arranged in a coplanar manner, the plurality of heat exchange groups are arranged at intervals along the air outlet direction, at least a part of flat pipes 61 in the same heat exchange group are arranged in parallel, and projections of different heat exchange groups along the air outlet direction to projection planes are at least partially overlapped.

The flat pipes 61 are divided into a plurality of groups of heat exchange groups, each group is arranged in a coplanar mode, the structural stability and the heat exchange capacity of the equipment can be enhanced while the heat exchange efficiency is maintained, and the paths for heat exchange media to pass through can be increased by arranging the flat pipes 61 in the same heat exchange group in parallel, so that the fluid distribution is optimized, and the heat exchange efficiency is improved.

Specifically, as shown in fig. 1 and 2, the coil head structure is a plurality of, and each coil head structure is connected with at least one heat exchange group.

By the arrangement, the use flexibility and expansibility of the fan coil structure can be improved, and the number and layout of the heat exchange groups can be adjusted according to different heat exchange requirements, so that more efficient and wider heat exchange is realized.

As shown in fig. 1 and 2, the driving fans 80 are multiple, the driving fans 80 are arranged at intervals along the axial direction of the straight pipe 61, the air inlets are multiple, and the air inlets are arranged in one-to-one correspondence with the driving fans 80.

Through setting up a plurality of air intakes and a plurality of driving fan 80 one-to-one setting, can ensure the evenly distributed of air current in the heat transfer chamber, further improved convection heat transfer efficiency.

The utility model also provides an air conditioning system which comprises the fan coil structure.

The air conditioning system provided by the utility model can provide a more efficient and more energy-saving air temperature regulation solution, and can ensure that the air conditioning system can keep good heat exchange efficiency and air circulation under different environmental conditions, thereby improving the comfort of indoor environment and the overall energy efficiency of the system, and providing a more efficient and more energy-saving technical solution for the air conditioning system.

The operation and principle of one embodiment of the present utility model will now be described in detail as follows:

As shown in fig. 1, 2 and 3, the double-header structure is formed through the structural design, and water flow can be secondarily distributed without adding extra electric valve pieces and other equipment, so that the heat exchange coil 60 of the heat exchanger can fully exert the performance advantages of the heat exchange coil, and the pipelines with poor heat radiation performance can be redistributed by arranging the number of the flat straight pipes 61 in different areas, so that the problem of further reduction of efficiency caused by uneven water flow distribution is avoided;

In one embodiment of the present utility model, the fan coil structure has an overall height of 210mm, the upper end of the air inlet is 20mm from the upper sheet metal part of the housing 90, the overall height of the air inlet is 90mm, the air dense region is located at the middle upper position of the fan coil structure of the heat exchanger, so that the top and bottom of the fan coil structure are air loose regions, the straight air in the air loose regions is smaller, the maximum straight tubes 61 are placed in the first region 101 (i.e. the air inlet) for the heat exchange efficiency of the air dense region and the air loose regions, the middle number of straight tubes 61 are placed in the second region 102 (i.e. the middle part of the heat exchange cavity), and the minimum number of straight tubes 61 are arranged in the third region 103 (i.e. the air port low efficiency region and the air quantity small position) for the heat exchange efficiency of the whole heat exchange coil 60 with reference to the branching layout of fig. 5 or 6.

In summary, the utility model provides a fan coil structure and an air conditioning system, the utility model ensures that heat exchange medium flows in from the N header and flows into the N-1 header after being split by the plurality of liquid splitting pipes 30 in the N-1 header until the heat exchange medium flows into the first header 10 after being split by the liquid splitting pipes 30 in the first liquid splitting group 31, the first header 10 conveys the heat exchange medium into the plurality of heat exchange coils 60 for heat exchange, thereby realizing N-1 split of the heat exchange medium, further ensuring reasonable distribution of the heat exchange medium, compared with the prior water flow distribution by adopting a claw-head water inlet mode, the fan coil structure provided by the utility model overcomes the limitation of the prior claw-head water inlet mode on water flow distribution, realizes uniform distribution of the heat exchange medium flow in the plurality of heat exchange coils 60 which are arranged in parallel, so that the heat exchange coils 60 can fully exert the performance of the heat exchange coil structure, simultaneously, further improves the working efficiency of the subsequent air conditioning system, reduces the working efficiency of the heat exchange medium, ensures the heat exchange system to have better efficiency, and further ensures the stability of the heat exchange system, and the heat exchange system can further realize the optimal running stability of the heat exchange medium, and the heat exchange system can further realize the heat exchange system, and the heat exchange system has better running stability due to the heat exchange medium distribution structure, and the heat exchange system has better heat exchange medium circulation structure, and better heat exchange medium efficiency and better heat exchange system running stability, the utility model has the advantages of simple structure, low cost, convenient assembly and subsequent maintenance, wide application prospect and suitability for large-scale popularization and use.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present application. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.

The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present utility model unless it is specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to one of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.

In the description of the present utility model, it should be understood that the azimuth or positional relationships indicated by the azimuth terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and these azimuth terms do not indicate and imply that the apparatus or elements referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present utility model, and the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.

Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present utility model.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (15)

1. A fan coil structure is characterized by comprising a coil head structure, wherein the coil head structure comprises N headers and at least two liquid separation pipes (30), N is larger than or equal to 2 and is a positive integer, the at least two liquid separation pipes (30) between two adjacent headers are used as a group of liquid separation pipes to form N-1 groups of liquid separation pipes, two ends of the at least two liquid separation pipes (30) in the same liquid separation pipe are respectively communicated with the two adjacent headers, the N headers comprise an N-1 header and an N header which are adjacent, the liquid separation pipes between the N-1 header and the N header are N-1-th liquid separation pipes, a first header (10) is communicated with a plurality of heat exchange coils (60) for heat exchange, the N header is communicated with an external pipeline (70) for circulating heat exchange media, the N-1 header, the N-2 header, the N-1 header, the second header (20), the first header (10) and the N-1-th heat exchange medium are sequentially conveyed from the N-1 header to the N header (30) through the N-1-th liquid separation pipes, and the N-1-th heat exchange medium are sequentially conveyed from the N-1-th header to the N header (30).

2. Fan coil structure according to claim 1, characterized in that in the first liquid distribution group (31) the central axis of the liquid distribution pipe (30) is at an angle to the central axis of the first header (10) and the central axis of the second header (20), and/or that at least one of the liquid distribution pipes (30) in the N-1-th liquid distribution group is in communication with the N-1-th header at a position closer to the middle of the N-1-th header than at least one of the liquid distribution pipes (30) in the N-2-th liquid distribution group is with the N-1-th header at a position N > 2.

3. The fan-coil structure according to claim 1, wherein when N is 2, the second header (20) is communicated with an external pipeline (70), two ends of the liquid dividing pipe (30) are respectively communicated with the first header (10) and the second header (20), at least two liquid dividing pipes (30) are arranged at intervals along the axial direction of the second header (20), and a heat exchange medium flows into the second header (20) and is divided by the at least two liquid dividing pipes (30) and then enters the first header (10).

4. The fan coil structure of claim 1 wherein,

When N is 2 and one external pipeline (70) is communicated with the second header (20), taking the communication position of the second header (20) and the external pipeline (70) as a first position, wherein the communication positions of two adjacent liquid separation pipes (30) closest to the middle part of the second header (20) along the axial direction of the second header (20) and the second header (20) are respectively a third position and a fourth position, and the first position is positioned between the third position and the fourth position so that the heat exchange medium flows from the middle part of the second header (20) to two ends in a diffusion way and then enters the first header (10);

When N is 2 and a plurality of external pipelines (70) are communicated with the second header (20), the communication position between the external pipeline (70) closest to one end of the second header (20) and the second header (20) is a first position, the communication position between the external pipeline (70) closest to the other end of the second header (20) and the second header (20) is a second position, and in the first liquid separation group (31), the communication positions between two adjacent liquid separation pipes (30) closest to the middle part of the second header (20) and the second header (20) along the axial direction of the second header (20) are a third position and a fourth position respectively, and the first position and the second position are both positioned between the third position and the fourth position so that the heat exchange medium flows into the first header (10) after being diffused from the middle part of the second header (20) to the two ends;

In the second liquid separation group (32), the communication position between the liquid separation pipe (30) closest to one end of the second header (20) and the second header (20) is a first position, the communication position between the liquid separation pipe (30) closest to the other end of the second header (20) and the second header (20) is a second position, and in the first liquid separation group (31), the communication positions between the two adjacent liquid separation pipes (30) closest to the middle part of the second header (20) and the second header (20) along the axial direction of the second header (20) are a third position and a fourth position, respectively, and the first position and the second position are both located between the third position and the fourth position, so that the heat exchange medium flows from the middle part of the second header (20) to the two ends in a diffusion way and enters the first header (10).

5. Fan-coil structure according to claim 1, characterized in that the position of communication between the liquid dividing tube (30) closest to one end of the first header (10) and the first header (10) in the axial direction of the first header (10) is a fifth position (11), the position of communication between the liquid dividing tube (30) closest to the other end of the first header (10) and the first header (10) is a sixth position (12), the positions of communication between two adjacent heat exchanging coils (60) closest to the middle of the first header (10) and the first header (10) are a seventh position (13) and an eighth position (14), respectively, and the fifth position (11) and/or the sixth position (12) are located between the seventh position (13) and the eighth position (14) so that the heat exchanging medium flows from the middle of the first header (10) to the two ends by diffusion and then enters the heat exchanging coils (60).

6. The fan coil structure of claim 1 wherein,

Taking the internal volume of the Nth header as the Nth volume, taking the sum of the volumes from the N-1 th header to the first header (10) as the liquid separating volume, and enabling the Nth volume to be larger than or equal to the liquid separating volume;

and/or the ratio of the inner diameter of the Nth header to the inner diameter of the N-1 th header is within the range of 1.5-2;

And/or the axial length of the N-1 th header is greater than the axial length of the N-th header, and both ends of the N-th header in the axial direction are located between both ends of the N-1 th header in the axial direction.

7. The fan coil structure of claim 1, further comprising a drive fan (80) and a plurality of heat exchange coils (60) for heat exchange, the drive fan (80) driving an airflow through the heat exchange coils (60) to convect the airflow with the heat exchange coils (60).

8. The fan coil structure of claim 7, wherein the drive fan (80) drives airflow to form an airflow wind field, the airflow wind field including adjacent dense and loose airflow zones, the dense airflow zone having a greater airflow density than the loose airflow zone, wherein the heat exchange coils (60) are arranged in the dense airflow zone in a greater number than the loose airflow zone.

9. The fan coil structure of claim 8, further comprising a housing (90), wherein the housing (90) has a heat exchange cavity therein, wherein the housing (90) further has an air inlet opening in communication with the heat exchange cavity, wherein the drive fan (80) is disposed on the housing (90) and in communication with the air inlet opening to drive the air flow from the air inlet opening into the heat exchange cavity, wherein the coil head structure is located outside the heat exchange cavity, and wherein at least a portion of the heat exchange coil (60) is located within the heat exchange cavity.

10. The fan coil structure according to claim 9, wherein the heat exchange coil (60) comprises a plurality of communicated flat tubes (61), the central axes of the flat tubes (61) are arranged in parallel, the central axes of the flat tubes (61) are perpendicular to the air outlet direction of the driving fan (80), the flat tubes (61), the airflow wind field and the air inlet are respectively projected to a projection plane perpendicular to the air outlet direction along the air outlet direction of the driving fan (80), at least a part of the projections of the air inlet are located in the projections of the airflow wind field, in the projection plane, the projection of the air inlet and the airflow wind field is taken as a first area (101), the projection of the airflow wind field outside the first area (101) is taken as a second area (102), the projection of the airflow wind field outside the first area is taken as a third area (103), the number of the flat tubes (61) in the first area (101) is a second number, and the second number is greater than the third number in the second area (102).

11. The fan coil structure of claim 10 wherein,

The first amount: the second amount: the third amount = 4:3:2;

Or the first amount to the second amount to the third amount = 4:2:2.

12. The fan coil structure according to claim 10, wherein a plurality of the straight pipes (61) form a plurality of groups of heat exchange groups, central axes of the plurality of straight pipes (61) in the same heat exchange group are arranged in a coplanar manner, the plurality of heat exchange groups are arranged at intervals along the air outlet direction, at least a part of the straight pipes (61) in the same heat exchange group are arranged in parallel, and projections of different heat exchange groups along the air outlet direction to the projection plane are at least partially overlapped.

13. The fan coil structure of claim 12, wherein there are a plurality of said coil head structures, each of said coil head structures being connected to at least one of said heat exchange groups.

14. The fan coil structure according to claim 10, wherein the number of the driving fans (80) is plural, the driving fans (80) are arranged at intervals along the axial direction of the straight tube (61), the number of the air inlets is plural, and the air inlets are arranged in one-to-one correspondence with the driving fans (80).

15. An air conditioning system comprising the fan coil structure of any of claims 1 to 14.