Fan coil and air conditioning system
By adding a second pipe row to the fan coil and optimizing the density and inclination angle of the fins, the problem of insufficient heat exchange caused by uneven wind speed is solved, and efficient heat exchange of the fan coil is achieved.
Patent Information
- Application Number
- CN202422369542.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-26
- Publication Date
- 2025-07-08
- Estimated Expiration
- 2034-09-26
AI Technical Summary
The air outlets of existing fan coils cannot cover the heat exchanger in the length and width directions, and the wind speed distribution is uneven, resulting in insufficient heat exchange area in the high-speed area and the maximum heat exchange cannot be achieved.
A second pipe row is added to the traditional heat exchanger structure, which is arranged in the area corresponding to the fan outlet, which increases the heat exchange area of the high-wind speed area, and optimizes the wind speed distribution by adjusting the fin density and inclination angle to improve heat exchange efficiency.
By increasing the heat exchange area in the high-wind speed area and optimizing the wind speed distribution, the overall heat exchange efficiency of the heat exchanger is greatly improved and the heat exchange is maximized.
Smart Images
Figure CN223077024U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of air conditioning, and in particular to a fan coil unit and an air conditioning system. Background Art
[0002] A fan coil unit is a common heat exchange device, which usually includes a shell, a fan and a heat exchanger. The heat exchanger is installed in the shell, and the fan is connected to the shell to blow air into the shell.
[0003] At present, the air outlet of the fan often cannot cover the heat exchanger in the length and width directions. At the same time, the wind speed distribution of the fan during operation is also uneven. Usually, the wind speed in the middle area facing the air outlet is higher, while the wind speed in the areas on both sides is lower. In addition, the design of conventional heat exchangers cannot adapt well to this wind speed distribution, resulting in insufficient heat exchange area in high wind speed areas and failure to maximize heat exchange. Utility Model Content
[0004] Based on this, it is necessary to provide a fan coil unit and air conditioning system to solve the problem that the existing heat exchanger design is difficult to maximize the heat exchange in the high wind speed area.
[0005] The present application provides a fan coil unit, comprising a shell, a fan and a heat exchanger, wherein the heat exchanger is installed in the shell, the fan is arranged outside the shell and connected to the shell, and an air outlet is provided on the fan, and the air outlet is used to transport airflow to the heat exchanger; the heat exchanger comprises a first tube row and a second tube row, the first tube row and the second tube row both extend along the length direction of the shell, and the second tube row is connected to a side of the first tube row close to the air outlet, wherein, along the height direction of the shell, one end of the second tube row (32) is arranged close to one end of the air outlet (201), and the other end of the second tube row (32) is arranged close to the other end of the air outlet (201), and the width D of the projection of the second tube row (32) on the air outlet (201) along the width direction of the shell (10) and the width d of the air outlet (201) satisfy, D≤d.
[0006] In one embodiment, the second tube row includes a plurality of fins and a plurality of heat exchange tubes. Along the length direction of the shell, the plurality of fins are spaced apart from each other and arranged in parallel, and the heat exchange tubes are passed through and connected to the fins. The number n of the heat exchange tubes satisfies that the value of n / 2 is an integer.
[0007] In one embodiment, a plurality of the fins are arranged to form a first zone and a second zone; wherein the first zone is arranged corresponding to the direction of the air outlet, and the spacing between adjacent fins in the first zone is smaller than the spacing between adjacent fins in the second zone.
[0008] In one embodiment, along the length direction of the housing, the length h of the air outlet and the length H of the first region satisfy h ≤ H ≤ 1.3h.
[0009] In one embodiment, the number of the fans is multiple, and the multiple fans are arranged at intervals along the length direction of the housing; wherein, the number of the first regions corresponds to the number of the fans one by one.
[0010] In one embodiment, the first tube row and the second tube row are of an integral structure; alternatively, the first tube row and the second tube row are spliced and connected.
[0011] In one embodiment, the heat exchanger is vertically arranged.
[0012] In one embodiment, the heat exchanger is inclined, and the upper end of the heat exchanger is close to the air outlet, and the lower end of the heat exchanger is far from the air outlet.
[0013] In one embodiment, the inclination angle θ of the heat exchanger relative to the vertical direction satisfies 10° ≤ θ ≤ 30°.
[0014] The present application also provides an air conditioning system, and the air conditioning system includes the fan coil unit described in any one of the above embodiments.
[0015] Compared with the prior art, for the fan coil unit and the air conditioning system provided by the present application, the first tube row can adopt a conventional heat exchanger structure in the traditional technology, that is, the present application adds a second tube row to the traditional heat exchanger structure, and by arranging the second tube row in the area corresponding to the air outlet of the fan, the heat transfer area required for the high wind speed area is increased, so as to better adapt to the wind speed distribution and greatly improve the overall heat transfer efficiency of the heat exchanger. 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 use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can be obtained according to these drawings without creative efforts.
[0017] Figure 1 It is a schematic structural diagram of a fan coil unit according to an embodiment provided by the present application;
[0018] Figure 2 It is a top view of a fan coil unit according to an embodiment provided by the present application;
[0019] Figure 3Side view of a fan coil unit according to an embodiment provided by the present application;
[0020] Figure 4 Side view of a fan coil unit according to another embodiment provided by the present application;
[0021] Figure 5 Schematic structural diagram of a heat exchanger according to an embodiment provided by the present application;
[0022] Figure 6 Schematic structural diagram of a heat exchanger according to another embodiment provided by the present application.
[0023] The meanings represented by the symbols in the figure are as follows:
[0024] 100, fan coil unit; 10, housing; 20, fan; 201, air outlet; 30, heat exchanger; 31, first tube row; 32, second tube row; 3201, first zone; 3202, second zone; 321, fin; 322, heat exchange tube. Detailed implementation manners
[0025] In order to make the above objects, features and advantages of the present application more obvious and understandable, the following will describe the detailed implementation manners of the present application in conjunction with the accompanying drawings. Many specific details are set forth in the following description in order to fully understand the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the connotation of the present application. Therefore, the present application is not limited by the specific embodiments disclosed below.
[0026] It should be noted that when a component is referred to as being "fixed to" or "disposed on" another component, it can be directly on the other component or there may also be an intermediate component. When a component is considered to be "connected" to another component, it can be directly connected to the other component or there may be an intermediate component at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in the description of the present application are only for the purpose of illustration and do not represent the only implementation manner.
[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying 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 of such features. In the description of the present application, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.
[0028] In this application, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may mean that the first feature is in direct contact with the second feature, or the first feature is in indirect contact with the second feature through an intermediate medium. Moreover, the first feature being "above", "over" or "on top of" the second feature may mean that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" or "underneath" the second feature may mean that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.
[0029] Unless otherwise defined, all technical and scientific terms used in the specification of this application have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in the specification of this application includes any and all combinations of one or more of the related listed items.
[0030] A fan coil unit is a common heat exchange device, which usually includes a housing, a fan and a heat exchanger. The heat exchanger is installed in the housing, and the fan is connected to the housing and used to blow air into the housing.
[0031] Currently, the air outlet of the fan often cannot cover the heat exchanger in the length and width directions. At the same time, the wind speed distribution during the operation of the fan is also uneven. Usually, the wind speed in the middle area directly facing the air outlet is relatively high, while the wind speed in the areas on both sides is relatively low. Moreover, the design of conventional heat exchangers cannot well adapt to this wind speed distribution, resulting in insufficient heat exchange area in the high wind speed area and unable to maximize the heat exchange capacity.
[0032] Please refer to Figures 1-6 , to solve the problem that it is difficult for the existing heat exchanger design to maximize the heat exchange capacity in the high wind speed area, this application provides a fan coil unit 100. The fan coil unit 100 includes a housing 10, a fan 20 and a heat exchanger 30. The heat exchanger 30 is installed in the housing 10, the fan 20 is arranged outside the housing 10 and connected to the housing 10. An air outlet 201 is provided on the fan 20, and the air outlet 201 is used to convey air flow to the heat exchanger 30. During the operation of the fan coil unit 100, the air flow generated by the fan 20 blows to the surface of the heat exchanger 30 through the air outlet 201 and exchanges heat with the heat exchanger 30 through convection heat transfer and other methods, thereby improving the working efficiency of the heat exchanger 30.
[0033] Please refer to Figures 3-6, the heat exchanger 30 provided by this application includes a first tube row 31 and a second tube row 32. Both the first tube row 31 and the second tube row 32 extend along the length direction of the housing 10, and the second tube row 32 is connected to the side of the first tube row 31 close to the air outlet 201. Among them, along the height direction of the housing 10, one end of the second tube row 32 is arranged close to one end of the air outlet 201, and the other end of the second tube row 32 is arranged close to the other end of the air outlet 201. And, the width D of the projection of the second tube row 32 on the air outlet 201 along the width direction of the housing 10 and the width d of the air outlet 201 satisfy D ≤ d.
[0034] It can be understood that the first tube row 31 can adopt the conventional heat exchanger 30 structure in the traditional technology. That is, a second tube row 32 is newly added to the traditional heat exchanger 30 structure in this application. And by arranging the second tube row 32 in the area corresponding to the air outlet 201 of the fan 20, the heat exchange area required in the high wind speed area is increased, so as to better adapt to the wind speed distribution and greatly improve the overall heat exchange efficiency of the heat exchanger 30.
[0035] It should be noted that in this application, the height direction of the housing 10 is the width direction of the air outlet 201, and the two are usually parallel to the gravity direction. The length direction of the housing 10 is the length direction of the heat exchanger 30 and the air outlet 201.
[0036] Preferably, the width of the projection of the second tube row 32 on the air outlet 201 along the width direction of the housing 10 can be set to be equal to the width of the air outlet 201.
[0037] Generally, the second tube row 32 includes a plurality of fins 321 and a plurality of heat exchange tubes 322. Along the length direction of the housing 10, the plurality of fins 321 are arranged at intervals and in parallel, and the heat exchange tubes 322 are penetrated and connected to the fins 321. A heat exchange medium flows through the heat exchange tubes 322, and the fins 321 are used to increase the contact area between the heat exchange tubes 322 and the air, so as to further improve the heat exchange effect.
[0038] Furthermore, the heat exchanger 30 generally further includes a header (not shown in the figure), and the header is divided into an inlet liquid header and an outlet liquid header. Among them, both the inlet liquid header and the outlet liquid header are installed on the same side in the length direction of the heat exchanger 30. Based on this, in order to realize the smooth flow of the heat exchange medium in the heat exchange tubes 322 of the second tube row 32, in one embodiment, the number n of the heat exchange tubes 322 satisfies that the value of n / 2 is an integer. That is, at least two heat exchange tubes 322 form a flow-out and flow-in path with the corresponding inlet liquid header and outlet liquid header, avoiding that when the number of heat exchange tubes 322 is odd, at least one heat exchange tube 322 cannot be utilized during circulation, resulting in an increase in cost.
[0039] In one embodiment, as Figure 5As shown, a plurality of fins 321 are arranged to form a first region 3201 and a second region 3202. Among them, the first region 3201 is arranged corresponding to the air outlet 201, and the distance between adjacent fins 321 in the first region 3201 is smaller than the distance between adjacent fins 321 in the second region 3202. That is to say, the arrangement of the fins 321 in the first region 3201 is denser than that in the second region 3202. Since the first region 3201 is arranged opposite to the air outlet 201 and the wind speed is faster, increasing the density of the arrangement of the fins 321 in the first region 3201 can further increase the heat exchange area required in the region with a higher wind speed, thereby improving the heat exchange effect.
[0040] It can be understood that here, both the first region 3201 and the air outlet 201 are preferably symmetrically arranged with respect to the same plane perpendicular to the length direction of the housing 10, and the arrangement of the fins 321 is more reasonable.
[0041] Furthermore, in one embodiment, as Figure 2 and Figure 5 shown, along the length direction of the housing 10, the length h of the air outlet 201 and the length H of the first region 3201 satisfy h ≤ H ≤ 1.3h. In this way, the utilization rate of the wind can be further improved, and the maximum heat exchange amount can be achieved.
[0042] Specifically, if H > 1.3h, the length of the first region 3201 is relatively long, resulting in an increase in the number of fins 321, thus increasing the cost. If H < h, the length of the first region 3201 is relatively short, and the high wind speed region cannot be fully utilized, and the maximum heat exchange amount cannot be achieved. Among them, the length H of the first region 3201 can be reasonably set according to actual needs. For example, it can be set to h, 1.1h, 1.2h, 1.3h, etc., and will not be listed one by one here.
[0043] Since the length of the housing 10 is usually relatively long, a single fan 20 is difficult to meet the air volume required for heat exchange. Therefore, in one embodiment, as Figure 1 and Figure 2 shown, the number of fans 20 is multiple, and the multiple fans 20 are arranged at intervals along the length direction of the housing 10. Specifically, two fans 20 are arranged in this embodiment.
[0044] Among them, the number of the first regions 3201 is set corresponding to the number of the fans 20 one by one to further improve the utilization rate of the high wind speed region and achieve the maximum heat exchange amount.
[0045] In one embodiment, the first tube row 31 and the second tube row 32 are of an integral structure. Among them, the first tube row 31 also includes fins 321 and heat exchange tubes 322 passing through the fins 321. It can be understood that the first tube row 31 and the second tube row 32 are integrally designed, that is, by setting the fins 321 as an integral body, thus ensuring the overall structural strength of the heat exchanger 30.
[0046] In another embodiment, as Figure 4 and Figure 5 shown, the first tube row 31 and the second tube row 32 can also be connected by splicing. In this way, the design between the first tube row 31 and the second tube row 32 is more flexible.
[0047] It should be noted that when the number of fins 321 on the second tube row 32 is equal to the number of fins 321 on the first tube row 31, only the fins 321 on the two need to be spliced one by one. When the number of fins 321 on the two is not equal, for example, since the fins 321 in the first area 3201 on the second tube row 32 are denser, therefore, only part of the fins 321 in the first area 3201 can be spliced and connected to the fins 321 on the first tube row 31, and the other part does not need to participate in the connection.
[0048] Generally, the heat exchanger 30 can be arranged vertically in the housing 10 as Figure 3 shown, so as to reduce the installation difficulty of the heat exchanger 30. That is to say, here, both the first tube row 31 and the second tube row 32 are arranged vertically.
[0049] In another specific embodiment of the present application, as Figure 4 shown, the heat exchanger 30 can also be inclined, and the upper end of the heat exchanger 30 is close to the air outlet 201, and the lower end of the heat exchanger 30 is far from the air outlet 201. That is to say, here, both the first tube row 31 and the second tube row 32 are arranged obliquely. By arranging the heat exchanger 30 obliquely, on the one hand, within the same height range, the length of the fins 321 can be increased, which is beneficial to increasing the heat exchange area. On the other hand, compared with the traditional C-type heat exchanger 30 or V-type heat exchanger 30, arranging the heat exchanger 30 obliquely in the present application is also beneficial to drainage.
[0050] It should be noted that the C-type heat exchanger 30 or V-type heat exchanger 30 means that the fins 321 are bent into a C shape or a V shape. Since water droplets will condense on the surface of the fins 321 after heat exchange, if they cannot be discharged in time, it will greatly affect the heat exchange effect. And the water droplets generated in the upper part of the fins 321 in the C-type heat exchanger 30 and V-type heat exchanger 30 will drip to the lower part of the fins 321. Therefore, compared with arranging the heat exchanger 30 obliquely, its drainage performance is poor.
[0051] It should also be noted that when the heat exchanger 30 is inclined, the two ends of the second tube row 32 in the height direction are also preferably arranged within the width coverage range of the air outlet 201.
[0052] Further, in an embodiment, the inclination angle θ of the heat exchanger 30 relative to the vertical direction satisfies 10° ≤ θ ≤ 30°. In this way, the drainage performance can be further improved.
[0053] Preferably, the inclination angle of the heat exchanger 30 relative to the vertical direction is set to 17°. At this time, the drainage and heat exchange effects of the heat exchanger 30 are optimal. Of course, the inclination angle of the heat exchanger 30 relative to the vertical direction can also be set to 10°, 15°, 20°, 25° or 30°, etc., which are not listed one by one here.
[0054] The present application also provides an air conditioning system, which includes the fan coil unit 100 of any one of the above embodiments.
[0055] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.
[0056] The above-described embodiments only represent several implementation manners of the present application. Their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the patent application. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present application, several modifications and improvements can still be made, and these all belong to the protection scope of the present application. Therefore, the patent protection scope of the present application should be subject to the appended claims.
Claims
1. A fan coil unit, comprising a housing (10), a fan (20) and a heat exchanger (30), wherein the heat exchanger (30) is installed in the housing (10), the fan (20) is arranged outside the housing (10) and connected to the housing (10), and an air outlet (201) is provided on the fan (20), and the air outlet (201) is used to convey airflow to the heat exchanger (30); Characterized in that, The heat exchanger (30) comprises a first tube row (31) and a second tube row (32), wherein the first tube row (31) and the second tube row (32) both extend along the length direction of the shell (10), and the second tube row (32) is connected to a side of the first tube row (31) close to the air outlet (201), wherein, along the height direction of the shell (10), one end of the second tube row (32) is arranged close to one end of the air outlet (201), and the other end of the second tube row (32) is arranged close to the other end of the air outlet (201), and the width D of the projection of the second tube row (32) on the air outlet (201) along the width direction of the shell (10) and the width d of the air outlet (201) satisfy, D≤d.
2. The fan coil unit according to claim 1, characterized in that The second tube row (32) comprises a plurality of fins (321) and a plurality of heat exchange tubes (322); along the length direction of the shell (10), the plurality of fins (321) are arranged in parallel and spaced apart from each other, and the heat exchange tubes (322) are passed through and connected to the fins (321); Wherein, the number n of the heat exchange tubes (322) satisfies that the value of n / 2 is an integer.
3. The fan coil unit according to claim 2, characterized in that, The plurality of fins (321) are arranged to form a first area (3201) and a second area (3202); The first zone (3201) is arranged in a corresponding direction to the air outlet (201), and the spacing between adjacent fins (321) in the first zone (3201) is smaller than the spacing between adjacent fins (321) in the second zone (3202).
4. The fan coil unit according to claim 3, wherein Along the length direction of the shell (10), the length h of the air outlet (201) and the length H of the first zone (3201) satisfy h≤H≤1.3h.
5. The fan coil unit according to claim 3, characterized in that, The number of the fans (20) is plural, and the fans (20) are arranged at intervals along the length direction of the housing (10); The number of the first zones (3201) and the number of the fans (20) are arranged in a one-to-one correspondence.
6. The fan coil unit according to any one of claims 2-5, characterized in that, The first tube row (31) and the second tube row (32) are integral structures; Alternatively, the first tube row (31) and the second tube row (32) are spliced and connected.
7. The fan coil unit according to any one of claims 2-5, characterized in that, The heat exchanger (30) is arranged vertically.
8. The fan coil unit according to any one of claims 2-5, characterized in that, The heat exchanger (30) is arranged in an inclined manner, and the upper end of the heat exchanger (30) is close to the air outlet (201), and the lower end of the heat exchanger (30) is far away from the air outlet (201).
9. The fan coil unit according to claim 8, wherein, The inclination angle θ of the heat exchanger (30) relative to the vertical direction satisfies 10°≤θ≤30°.
10. An air conditioning system, characterized in that, It comprises a fan coil unit as described in any one of claims 1 to claim 9.