CN215647929U - Cooling device and cluster router - Google Patents
Cooling device and cluster router Download PDFInfo
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- CN215647929U CN215647929U CN202121395288.9U CN202121395288U CN215647929U CN 215647929 U CN215647929 U CN 215647929U CN 202121395288 U CN202121395288 U CN 202121395288U CN 215647929 U CN215647929 U CN 215647929U
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- service plate
- cooling device
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- 238000001816 cooling Methods 0.000 title claims abstract description 61
- 239000007788 liquid Substances 0.000 claims abstract description 89
- 239000000110 cooling liquid Substances 0.000 claims abstract description 66
- 230000017525 heat dissipation Effects 0.000 abstract description 7
- 238000013461 design Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 8
- 239000002826 coolant Substances 0.000 description 6
- 238000009835 boiling Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000010295 mobile communication Methods 0.000 description 2
- 229920001296 polysiloxane Polymers 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 239000008367 deionised water Substances 0.000 description 1
- 229910021641 deionized water Inorganic materials 0.000 description 1
- 229920002545 silicone oil Polymers 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses a cooling device and a cluster router, relates to the technical field of heat exchange, and is used for heat dissipation of the cluster router. The embodiment of the utility model provides a cooling device, which is applied to a cluster router, wherein the cluster router comprises a service plate arranged along the vertical direction, and the cooling device comprises a heat exchanger, a liquid feeding pipe, a gas collecting groove positioned on at least one side of the service plate and a gas return pipe positioned above the gas collecting groove; the heat exchanger is used for guiding the cooling liquid to the top of the side wall of the service plate through the liquid feeding pipe; the gas collecting tank is used for conveying gas generated by phase change when cooling liquid flows downwards on the side wall of the service plate to the heat exchanger through the gas return pipe; and the heat exchanger is also used for cooling the received gas to obtain cooling liquid. The utility model is used for reducing heat exchange power consumption.
Description
Technical Field
The utility model relates to the technical field of heat exchange, in particular to a cooling device and a cluster router.
Background
With the network construction of the fifth Generation Mobile Communication Technology (5th Generation Mobile Communication Technology, 5G), the power consumption of the cluster router applied to large centralized nodes (such as national trunk large-traffic nodes, provincial trunk cores and developed city metropolitan area network outlets) is increasing, which results in an increasing pressure on heat dissipation of the cluster router.
However, most cluster routers currently dissipate heat in a conventional air cooling mode, and are cooled by fans. On one hand, the fan is adopted for cooling, more electric energy is additionally consumed, and the working environment of the cluster router at the normal temperature can be ensured. On the other hand, when the fan works, the blades of the fan can generate noise due to the power action of uneven airflow at the air outlet of the fan which is periodically born; as fan power increases, noise also increases.
SUMMERY OF THE UTILITY MODEL
The embodiment of the utility model provides a cooling device and a cluster router, which are used for solving the problem of heat dissipation of the cluster router.
In order to achieve the above purpose, the embodiment of the utility model adopts the following technical scheme:
in a first aspect, an embodiment of the present invention provides a cooling device, which is applied to a cluster router, where the cluster router includes a service plate arranged in a vertical direction, and the cooling device includes a heat exchanger, a liquid sending pipe, a gas collecting channel located on at least one side of the service plate, and a gas return pipe located above the gas collecting channel; the heat exchanger is used for guiding the cooling liquid to the top of the side wall of the service plate through the liquid feeding pipe; the gas collecting tank is used for conveying gas generated by phase change when cooling liquid flows downwards on the side wall of the service plate to the heat exchanger through the gas return pipe; and the heat exchanger is also used for cooling the received gas to obtain cooling liquid.
In a second aspect, an embodiment of the present invention further provides a cluster router, which includes a service board arranged along a vertical direction, and further includes the cooling device provided in the first aspect.
In the cooling device provided by the embodiment of the utility model, after the heat exchanger leads the cooling liquid to the top of the side wall of the service plate through the liquid feeding pipe, the cooling liquid flows downwards along the side wall of the service plate; in the flowing process of the cooling liquid, the cooling liquid absorbs the heat of the side wall of the service plate to cool the service plate. Meanwhile, the cooling liquid is converted from a liquid state to a gaseous state in the process of absorbing heat of the side wall of the service plate by the cooling liquid. The gas produced by the phase change will rise in the gas collection tank because the density is less than that of air. Meanwhile, one side of the gas collecting groove is the side wall of the service plate, so that pressure is generated in the gas collecting groove along with the heating of the side wall of the service plate. Therefore, the gas generated by phase change on the side wall of the service plate rises by itself and rises in the gas collecting groove under the action of the pressure of the gas collecting groove and returns to the heat exchanger through the gas return pipe above the gas collecting groove, so that the whole heat exchange process is completed. The cooling device replaces an air cooling mode adopted in the traditional cluster router, and natural circulation is generated by using gravity factors, so that the power consumption of air cooling heat dissipation consumption can be reduced, and the noise generated by the flowing of cooling liquid is obviously smaller than the heat dissipation noise of a fan.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a cluster router according to an embodiment of the present invention;
fig. 2 is a first schematic structural diagram of a cooling device according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a cooling device according to an embodiment of the present invention;
FIG. 4 is a schematic view of an inclined liquid feeding tube according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a liquid sending tube according to an embodiment of the present invention.
Reference numerals:
10-a cluster router; 11-a service board; 12-a cooling device; 121-a heat exchanger; 122-liquid delivery tube; 123-a gas collecting tank; 124-muffler; 125-homogenizing tank; 126-liquid supply branch pipe; 127-coolant distribution piping layer.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; the specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art. The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1, a cluster router 10 according to an embodiment of the present invention includes a service board 11 and a cooling device 12 arranged in a vertical direction. Wherein, the service board 11 generates heat due to operation and transfers the heat to the side wall of the service board 11; the cooling device 12 is used to absorb heat on the side wall of the service plate 11 through the cooling liquid.
As a possible implementation manner, the cooling device 12 stores a cooling liquid therein, and the cooling device 12 can guide the cooling liquid to the side wall of the service plate 11 to absorb heat generated by the service plate 11 through the cooling liquid.
Further, the cooling device 12 may also receive the gas obtained by the phase change of the cooling liquid due to the absorption of heat, and condense the received gas into the cooling liquid, so as to realize the circulating cooling of the cooling liquid.
As shown in fig. 2, the cooling device 12 according to the embodiment of the present invention is applied to the cluster router 10, and the cooling device 12 includes a heat exchanger 121, a liquid sending pipe 122, a gas collecting groove 123 located on at least one side of the service board 11, and a gas return pipe 124 located above the gas collecting groove 123. Wherein:
the heat exchanger 121 may be connected to the liquid feeding pipe 122, and the heat exchanger 121 is configured to guide the cooling liquid stored in the heat exchanger 121 to the top of the sidewall of the service plate 11 through the liquid feeding pipe 122.
In practical applications, the heat exchanger 121 stores a cooling fluid therein. When the cooling device 12 starts to operate, the heat exchanger 121 guides the cooling liquid to the top of the side wall of the service plate 11 through the liquid feeding pipe 122, and the cooling liquid flows down along the side wall of the service plate 11 by its own weight. During the flowing process of the cooling liquid, the cooling liquid absorbs the heat of the side wall of the service plate 11, and cools the service plate 11. Meanwhile, the cooling liquid is converted from a liquid state to a gaseous state in a process in which the cooling liquid absorbs heat from the side wall of the service plate 11.
It should be noted that the cooling liquid may be stored in the heat exchanger 121 by the maintenance personnel in advance.
And a gas collecting groove 123 for supplying gas generated by phase change when the cooling liquid flows down on the side wall of the service plate 11 to the heat exchanger 121 through the gas return pipe 124.
Wherein, one end of the air return pipe 124 is connected with the top of the gas collecting tank 123, and the other end of the air return pipe 124 is connected with the heat exchanger 121.
After the coolant is changed into gas by the heat absorption phase on the side wall of the service panel 11, the gas generated by the phase change has a density lower than that of air, and rises in the gas collecting tank. Meanwhile, one side of the gas collecting groove is the side wall of the service plate, so that pressure is generated in the gas collecting groove along with the heating of the side wall of the service plate. Therefore, the gas generated by the phase change on the side wall of the service board rises by itself, and rises in the gas collecting groove under the action of the pressure of the gas collecting groove and returns to the heat exchanger through the gas return pipe above the gas collecting groove.
The heat exchanger 121 is also used for cooling the received gas to obtain a cooling liquid.
In some implementations, the heat exchanger 121 may be a device or apparatus having a cooling function, and may also be a device or apparatus in a constant temperature state. Therefore, the heat exchanger 121 can condense the gaseous cooling liquid received by the heat exchanger 121, and then obtain the liquid cooling liquid.
It can be understood that the cooling device provided by the embodiment of the utility model leads the cooling liquid to the top of the side wall of the service plate through the liquid sending pipe by the heat exchanger, and then the cooling liquid flows downwards along the side wall of the service plate; in the flowing process of the cooling liquid, the cooling liquid absorbs the heat of the side wall of the service plate to cool the service plate. Meanwhile, the cooling liquid is converted from a liquid state to a gaseous state in the process of absorbing heat of the side wall of the service plate by the cooling liquid. The gas produced by the phase change will rise in the gas collection tank because the density is less than that of air. Meanwhile, one side of the gas collecting groove is the side wall of the service plate, so that pressure is generated in the gas collecting groove along with the heating of the side wall of the service plate. Therefore, the gas generated by phase change on the side wall of the service plate rises by itself and rises in the gas collecting groove under the action of the pressure of the gas collecting groove and returns to the heat exchanger through the gas return pipe above the gas collecting groove, so that the whole heat exchange process is completed. The cooling device replaces an air cooling mode adopted in the traditional cluster router, and natural circulation is generated by using gravity factors, so that the power consumption of air cooling heat dissipation consumption can be reduced, and the noise generated by the flowing of cooling liquid is obviously smaller than the heat dissipation noise of a fan.
In one design, as shown in FIG. 3, the cooling device 12 of the present embodiment further includes a homogenizing tank 125; the liquid equalizing tank 125 is located above the service plate 11, the liquid equalizing tank 125 is connected with the heat exchanger 125 through a liquid supply branch pipe 126, and the bottom of the liquid equalizing tank 125 is connected with the liquid supply pipe 122.
The equalization tank 125 is used for storing the cooling liquid delivered by the heat exchanger 125 and draining the cooling liquid to the liquid delivery pipe 122.
The feed manifold 126 is located in a coolant distribution piping layer 127. The cooling liquid transmission and distribution pipeline layer 127 is provided with a cover plate on the front side and a detachable blind plate on the back side, so that the cooling liquid transmission and distribution pipeline can be maintained in a later period. A plurality of branch liquid supply pipes 126 and a plurality of gas return pipes 124 may be disposed in the coolant distribution piping layer 127. The cooling liquid in the heat exchanger 125 is conveyed to the liquid homogenizing tank 125 through a liquid supply branch pipe 126 in the cooling liquid conveying and distributing pipeline layer 127; the equalization tank 125 drains the received cooling liquid into the liquid sending pipe 122.
Optionally, the liquid supply branch pipe 126 is connected to the heat exchanger 125 at a position lower than the position where the return pipe 124 is connected to the heat exchanger 125.
It can be understood that the cooling device provided by the embodiment of the utility model is further provided with a liquid homogenizing tank, and the heat exchanger is used for delivering and distributing the cooling liquid into the liquid homogenizing tank for pre-configuration so as to ensure that the cooling liquid can uniformly flow into each liquid sending pipe.
In one design, as shown in fig. 3, the liquid delivery tube 122 provided in the embodiment of the present invention may be a sloped liquid delivery tube in order to more conveniently direct the cooling liquid to the top of the sidewall of the service plate 11.
Specifically, two rows of inclined liquid feeding pipes may be disposed at the bottom of the liquid equalizing tank 125, and are inclined to the side walls of the two sides of the vertically disposed service plate 11.
Note that, a plurality of liquid sending pipes 126 may be connected to one liquid equalizing tank 125. As shown in fig. 4, when two ports are disposed at the bottom of the liquid equalizing tank 125, the liquid equalizing tank 125 can be connected to two inclined liquid feeding pipes.
It can be understood that the liquid sending pipe is arranged as the inclined liquid sending pipe in the embodiment of the utility model, thereby avoiding slow circulation of the cooling liquid caused by complicated pipeline shape, and guiding the cooling liquid to the top of the side wall of the service plate more conveniently.
In one design, the liquid sending tube 122 provided by the embodiment of the utility model, in case that the liquid sending tube 122 is an inclined liquid sending tube, the inclined angle thereof may be set between 30-45 degrees; the length of the inclined liquid feeding pipe can be flexibly configured according to the distance between the liquid homogenizing groove 125 and the top of the side wall of the service plate 11.
It will be appreciated that embodiments of the present invention may provide an angled feed tube that is angled between 30-45 degrees to maintain a suitable flow rate of the cooling fluid through the angled feed tube.
In one design, as shown in fig. 5, in order to make the coolant contact with the service plate 11 disposed in the vertical direction more fully, the embodiment of the present invention provides a circular pinhole at the lower end of the inclined liquid delivery tube, and the circular pinhole is attached to the top of the sidewall of the service plate 11.
It can be understood that, in the embodiment of the utility model, the circular pinholes are arranged at the lower end of the inclined liquid conveying pipe, and as the pinholes are uniformly distributed, when the cooling liquid flows out of the inclined liquid conveying pipe, the cooling liquid cannot flow out rapidly, so that the cooling liquid can flow out of the inclined liquid conveying pipe more gradually; the circular pin hole is attached to the top of the side wall of the service plate, so that the flowing cooling liquid can be in contact with the top of the side wall of the service plate more fully, and the heat exchange efficiency of the cooling device is improved.
In one design, as shown in fig. 3, to adjust the amount of coolant supplied, the cooling device 12 provided in the embodiment of the present invention further includes a solenoid valve.
The solenoid valves are used for connecting the liquid supply branch pipe 126 and the heat exchanger 121 respectively. The solenoid valve is used to regulate the rate of liquid supply from the liquid supply manifold 126.
Specifically, the liquid supply branch pipe 126 is connected with the heat exchanger 121 through an electromagnetic valve, and the control center can control the flow rate of the cooling liquid conveyed by the heat exchanger 121 to the liquid equalizing tank 125 by adjusting the opening degree of the electromagnetic valve.
It should be noted that the control center is a processor having a control function, and may be disposed in the heat exchanger 121. The control center may control the temperature of the heat exchanger 121 and the opening degree of the solenoid valve.
It can be understood that the cooling device provided by the embodiment of the utility model achieves the effect of adjusting the liquid supply speed of the liquid supply branch pipe by arranging the electromagnetic valve.
In one design, as shown in fig. 3, in order to guarantee the working temperature of the service board 11, the cooling device 12 according to the embodiment of the present invention further includes a temperature sensor disposed on a sidewall of the service board 11; the temperature sensor is connected to the heat exchanger 121.
The temperature sensor is used for collecting the temperature on the side wall of the service plate 11 and sending the collected temperature information to the heat exchanger 121.
The heat exchanger 121 is used for adjusting the liquid supply speed of the liquid supply branch pipe 126 through a solenoid valve according to the received temperature information so as to ensure that the service board 11 can work at a normal temperature.
As a possible implementation manner, the heat exchanger can obtain the temperature of the service plate in time by arranging a temperature sensor on the side wall of the service plate to adjust the liquid supply speed of the liquid supply branch pipe 126.
For example, if the temperature of the service panel is greater than the preset threshold, the heat exchanger increases the opening degree of the solenoid valve to increase the liquid supply speed of the liquid supply branch pipe 126, so as to ensure that the service panel can be cooled rapidly. When the temperature drop of the service plate is smaller than or equal to the preset threshold value, the opening of the electromagnetic valve is reduced by the heat exchanger, so that the liquid supply speed of the liquid supply branch pipe 126 is reduced, and the loss of the cooling liquid is reduced.
The preset threshold may be set in the cooling device by an operation and maintenance person of the cluster router in advance.
It can be understood that, in the cooling device provided by the embodiment of the present invention, the temperature sensor is arranged on the side wall of the service plate, so as to obtain the temperature of the service plate in time, so that the heat exchanger adjusts the liquid supply speed of the liquid supply branch pipe according to the temperature of the service plate; if the temperature of the service board is too high, the opening degree of the electromagnetic valve is increased by the heat exchanger, so that the liquid supply speed of the liquid supply branch pipe is increased, and the service board can be rapidly cooled. When the temperature of the service plate is reduced to be lower than the normal temperature, the opening degree of the electromagnetic valve can be reduced by the heat exchanger, so that the liquid supply speed is reduced, and the loss of the cooling liquid is reduced.
In one design, in order to improve the cooling effect, the cooling liquid provided by the embodiment of the utility model may be silicone oil, or may also be liquid with a cooling function, such as deionized water.
It should be noted that silicone grease has insulating and low boiling point properties. The boiling point is usually 30-60 ℃, and the phase change is easy to evaporate when heated.
It can be understood that the boiling point of a common cooling liquid is usually about 100 ℃, which causes the problems of too long cooling time and undesirable cooling effect. In the embodiment of the utility model, the silicone grease with a proper boiling point is used as the cooling liquid, and the boiling point temperature is moderate and is more suitable for the normal temperature of the service board. Therefore, when the temperature of the service board exceeds the normal temperature, the heat of the service board can be absorbed in time, so that the service board is quickly cooled to the normal temperature, and the cooling effect is further improved.
In one design, in order to save design space, when the number of the service plates 11 is plural, the gas collecting channel 123 in one cooling device 12 is shared between any two adjacent service plates 11.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. A cooling device is applied to a cluster router, the cluster router comprises a service plate arranged along the vertical direction, and the cooling device is characterized by comprising a heat exchanger, a liquid sending pipe, a gas collecting groove positioned on at least one side of the service plate, and a gas return pipe positioned above the gas collecting groove;
the heat exchanger is used for guiding cooling liquid to the top of the side wall of the service plate through the liquid feeding pipe;
the gas collecting tank is used for conveying gas generated by phase change when the cooling liquid flows downwards on the side wall of the service plate to the heat exchanger through the gas return pipe;
the heat exchanger is also used for cooling the received gas to obtain the cooling liquid.
2. The cooling device of claim 1, further comprising a homogenizing tank; the liquid homogenizing tank is positioned above the service plate, connected with the heat exchanger through a liquid supply branch pipe, and connected with the liquid supply pipe at the bottom;
the liquid equalizing tank is used for storing cooling liquid conveyed by the heat exchanger and draining the cooling liquid to the liquid conveying pipe.
3. The cooling apparatus of claim 2, wherein the liquid delivery tube is a sloped liquid delivery tube.
4. A cooling apparatus as claimed in claim 3, wherein the inclined liquid delivery pipe is inclined at an angle of 30 to 45 degrees.
5. The cooling device as claimed in claim 3, wherein the lower end of the inclined liquid delivery pipe is provided with a circular pinhole, and the circular pinhole is attached to the top of the side wall of the service plate.
6. The cooling device of claim 3, further comprising a solenoid valve; the electromagnetic valve is respectively connected with the liquid supply branch pipe and the heat exchanger and used for adjusting the liquid supply speed of the liquid supply branch pipe.
7. The cooling arrangement according to claim 6, further comprising a temperature sensor disposed on a side wall of the service plate;
the temperature sensor is used for acquiring the temperature on the side wall of the service plate and sending acquired temperature information to the heat exchanger;
the heat exchanger is used for adjusting the liquid supply speed of the liquid supply branch pipe through the electromagnetic valve according to the received temperature information.
8. A cluster router comprising a service board arranged in a vertical direction, characterized by further comprising a cooling device according to any one of claims 1 to 7.
9. The cluster router of claim 8, wherein the number of the service boards is plural, and any two adjacent service boards share a gas collecting channel in the cooling device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121395288.9U CN215647929U (en) | 2021-06-22 | 2021-06-22 | Cooling device and cluster router |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121395288.9U CN215647929U (en) | 2021-06-22 | 2021-06-22 | Cooling device and cluster router |
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| Publication Number | Publication Date |
|---|---|
| CN215647929U true CN215647929U (en) | 2022-01-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202121395288.9U Active CN215647929U (en) | 2021-06-22 | 2021-06-22 | Cooling device and cluster router |
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| CN (1) | CN215647929U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113365478A (en) * | 2021-06-22 | 2021-09-07 | 中国联合网络通信集团有限公司 | Cooling device and cluster router |
| CN115051961A (en) * | 2022-08-11 | 2022-09-13 | 南京博斯威尔工业通信技术有限公司 | Information exchange with two-layer encryption function |
-
2021
- 2021-06-22 CN CN202121395288.9U patent/CN215647929U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113365478A (en) * | 2021-06-22 | 2021-09-07 | 中国联合网络通信集团有限公司 | Cooling device and cluster router |
| CN115051961A (en) * | 2022-08-11 | 2022-09-13 | 南京博斯威尔工业通信技术有限公司 | Information exchange with two-layer encryption function |
| CN115051961B (en) * | 2022-08-11 | 2022-10-28 | 南京博斯威尔工业通信技术有限公司 | Information exchange with two-layer encryption function |
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