A high and low voltage reactive power compensation device using intelligent heat dissipation method

Abstract

The present invention relates to the technical field of reactive power compensation devices, and specifically to a high- and low-voltage reactive power compensation device using an intelligent heat dissipation method, comprising a cabinet, a mounting frame installed inside the cabinet, the mounting frame being used to install capacitors, inductors and other components, a heat dissipation component installed on one side of the cabinet, an air pressure sensor installed inside the cabinet, and the heat dissipation component comprising an annular filter, an air inlet pipe, a bobbin, a motor and two fixing plates. In the present invention, by setting the annular filter, the air inlet chamber and the exhaust chamber, when dust accumulates on the annular filter, the motor drives the annular filter to rotate, transferring the dust accumulation position to the position of the exhaust chamber, and then the exhaust assembly starts to compress the gas in the air inlet pipe, thereby accelerating the gas in the connecting channel to be blown out through the annular filter, increasing the speed of the air flow blowing out of the exhaust chamber, facilitating the air flow flushing of the annular filter, avoiding the blockage of the annular filter, achieving self-cleaning of the annular filter, and facilitating long-term heat dissipation use.

Description

Technical Field

[0001] The present invention relates to the technical field of reactive power compensation devices, in particular to a high- and low-voltage reactive power compensation device adopting an intelligent heat dissipation method. Background Art

[0002] Reactive power compensation, also known as reactive power compensation, is a technology that improves the power factor of the smart grid power supply system, reduces the loss of power supply transformers and transmission lines, improves power supply efficiency, and improves the power supply environment. Reactive power compensation devices are necessary devices in smart grid power supply systems. Through reactive power compensation devices, the loss of the power grid can be minimized and the quality of the power grid can be improved. When the reactive power compensation device is working, the internal capacitor will frequently charge and discharge. Its working power is synchronized with the peak and valley of power consumption of the production equipment. During peak power consumption, the reactive power compensation device needs to dissipate heat quickly, and during low power consumption, the reactive power compensation device generates less heat. Existing reactive power compensation devices mainly adjust the heat dissipation degree by adjusting the speed of the heat dissipation fan. However, the fan speed adjustment range is limited, and the heat dissipation effect is easily affected by other factors (such as dust accumulation on the filter and the air outlet). The scope of application is poor, and it is inconvenient to make intelligent adjustments according to the working peak and valley. Therefore, a high and low voltage reactive power compensation device with intelligent heat dissipation is proposed. Summary of the Invention

[0003] The object of the present invention is to provide a high and low voltage reactive power compensation device using an intelligent heat dissipation method to solve the problems raised in the above background technology.

[0004] To achieve the above object, the present invention provides the following technical solutions:

[0005] A high- and low-voltage reactive power compensation device using an intelligent heat dissipation method includes a cabinet, a mounting frame installed inside the cabinet, and the mounting frame is used to install capacitors, inductors, and other components. A heat dissipation component is installed on one side of the cabinet, and an air pressure sensor is installed in the cabinet. The heat dissipation component includes:

[0006] There are two fixed plates, the two fixed plates are arranged opposite to each other, an outer guard plate is fixedly connected between the two sides of the two fixed plates, and an inner partition is fixedly installed between the two fixed plates, the inner partition forms an air intake cavity and an exhaust cavity between the two fixed plates;

[0007] An annular filter is slidably mounted between the inner partition and the two outer guard plates, and is used to filter the incoming airflow;

[0008] A bobbin is mounted on a fixed plate, a fan is installed in the bobbin, and the bobbin is connected to the air inlet cavity;

[0009] There are two intake pipes, each of which is mounted on a fixed plate and communicates with the intake cavity. An intake pipe 2 is disposed above the intake pipe 1, and an exhaust assembly is installed between the intake pipes 1 and 2, the exhaust assembly being used to pressurize the intake cavity.

[0010] Motor 1 is installed on a fixed plate, and is used to drive the annular filter to rotate.

[0011] Furthermore, a window frame is fixedly connected to the top of the inner partition, a protective tile is slidably connected to the window frame, an air collecting port is provided in the middle position of the protective tile, and a second motor is installed on the outer side wall of one of the fixed plates, and the second motor is used to drive the protective tile to slide.

[0012] Furthermore, the fan-shaped curvatures of the air inlet cavity and the exhaust cavity are both less than ninety degrees, a circular shaft is rotatably connected between the two sides of the two fixed plates, a friction wheel 2 is fixedly mounted on the circular shaft, the friction wheel 2 is used for extrusion contact with the protective tile, the two circular shafts are transmission-connected, and the output end of the motor 2 is transmission-connected to a circular shaft.

[0013] Furthermore, a friction wheel 1 is rotatably connected between the two fixed plates in the air inlet cavity, the output end of the motor 1 is transmission-connected to the friction wheel 1, and the friction wheel 1 is used for squeezing and fitting with the annular filter.

[0014] Furthermore, a connecting channel is installed between one end of the two air inlet pipes, an air duct is installed on one side of the connecting channel, a closing plate is slidably installed in the connecting channel, a push plate is fixedly installed on one side of the closing plate, and the push plate is slidably connected to the air duct.

[0015] Furthermore, both ends of the closing plate are fitted with the inner walls of one end of the air inlet pipe.

[0016] Furthermore, the top end of one of the two air inlet pipes 2 extends to a top corner position of the top end of the cabinet, and the top end of the other air inlet pipe 2 extends to another top corner position of the top end of the cabinet.

[0017] Further, the exhaust assembly includes a third motor and an air collecting pipe, the air collecting pipe is fixedly installed between the corresponding first air intake pipe and the second air intake pipe, and the air collecting pipe is connected to both the first air intake pipe and the second air intake pipe. The top end of the air collecting pipe is slidably sleeved with a push rod, and the bottom end of the push rod is fixedly connected to a piston plate. The third motor is installed on the cabinet body, and the third motor is used to drive the push rod to move up and down.

[0018] Furthermore, the output end of the push rod is transmission-connected with a screw rod, the screw rod is rotatably mounted on the inner wall of the cabinet, and the top end of the push rod is screw-connected with the screw rod.

[0019] Furthermore, a compression section is provided at the bottom end of the gas collecting pipe, and an expansion section is provided at the top end of the gas collecting pipe. The inner diameter of the compression section matches the outer diameter of the piston plate, and the inner contour of the expansion section is larger than the outer contour of the piston plate.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. Through the arrangement of the annular filter, the air inlet cavity and the exhaust cavity, when dissipating heat, the fan in the barrel supplies air flow into the cabinet, and the annular filter filters the dust in the incoming air flow. The air flow in the cabinet enters the air inlet pipe one through the air inlet pipe two, and then enters the exhaust cavity and passes through the annular filter from the inside to the outside. When dust accumulates on the annular filter or the heat dissipation intensity needs to be increased, the motor one drives the annular filter to rotate, and the dust accumulation position is transferred to the position of the exhaust cavity. Then the exhaust component starts to compress the gas in the air inlet pipe one, thereby accelerating the gas in the connecting channel to pass through the annular filter and blow out, increasing the speed of the air flow blowing out of the exhaust cavity, making it convenient to flush the annular filter with air flow, avoiding clogging of the annular filter, realizing self-cleaning of the annular filter, reducing the frequency of manual maintenance or replacement, and facilitating long-term heat dissipation use;

[0022] 2. Through the setting of the closing plate, when the exhaust assembly compresses the air inlet pipe 1, the two screw rods are driven in turn, so that the gas in the two air inlet pipes is compressed in turn. When the gas in one air inlet pipe 1 is compressed, the air pressure in one air inlet pipe 1 increases, thereby pushing the push plate, causing the closing plate to slide into the other air inlet pipe 1, and closing the other air inlet pipe 1 through the closing plate. When the gas in the other air inlet pipe 1 is compressed, the air pressure pushes the closing plate to move into one air inlet pipe 1, closing one air inlet pipe 1, so that when one air inlet pipe 1 is exhausted to the outside, the other air inlet pipe 1 is closed, thereby preventing the gas from flowing back from the other air inlet pipe 1, and facilitating the air flow flushing of the annular filter wheel of the two air inlet pipes. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the side view of the interior structure of the cabinet in the present invention;

[0025] Figure 3 It is a schematic structural diagram of the heat dissipation component in the present invention;

[0026] Figure 4 It is a schematic diagram of the internal structure of the fixed plate in the present invention;

[0027] Figure 5 It is a schematic diagram of the structure of the air intake cavity and the exhaust cavity in the present invention;

[0028] Figure 6This is a schematic diagram of the positions of motor 1 and motor 2 in the present invention;

[0029] Figure 7 This is a schematic diagram of the internal structure of the bottom end of the air intake pipe in the present invention;

[0030] Figure 8 It is a schematic diagram of the internal structure of the exhaust component in the present invention.

[0031] In the figure: 100, cabinet; 110, mounting frame; 200, heat dissipation assembly; 210, fixing plate; 211, outer protective plate; 212, inner partition; 213, air inlet chamber; 214, exhaust chamber; 215, window frame; 220, annular filter; 230, protective tile; 231, air collecting port; 240, air inlet pipe 1; 241, connecting channel; 242, air duct; 243, closing plate; 244, push plate; 250, bobbin; 260, motor 1; 261, friction wheel 1; 270, motor 2; 271, circular shaft; 272, friction wheel 2; 280, air inlet pipe 2; 300, exhaust assembly; 310, air collecting pipe; 311, compression section; 312, expansion section; 320, motor 3; 330, screw rod; 340, push rod; 341, piston plate. DETAILED DESCRIPTION

[0032] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] See also Figures 1 to 6In an embodiment of the present invention, a high- and low-voltage reactive power compensation device adopting an intelligent heat dissipation method includes a cabinet 100, a mounting frame 110 is installed inside the cabinet 100, and the mounting frame 110 is used to install capacitors, inductors and other components. A heat dissipation component 200 is installed on one side of the cabinet 100, and an air pressure sensor is installed in the cabinet 100. The heat dissipation component 200 includes an annular filter 220, an air intake pipe 240, a bobbin 250, a motor 260 and two fixed plates 210. The two fixed plates 210 are arranged opposite to each other, and an outer protective plate 211 is fixedly connected between the two sides of the two fixed plates 210. An inner partition 212 is fixedly installed between the two fixed plates 210, and the inner partition 212 forms an air intake cavity 213 and an exhaust cavity 214 between the two fixed plates 210. One of the fixed plates 210 is installed on the outer wall of the cabinet 100, and the annular filter 220 is slidably installed between the inner partition 212 and the two outer protective plates 211. The annular filter 220 is used to In order to filter the incoming air flow, the tube 250 is mounted on a fixed plate 210, a fan is installed in the tube 250, the tube 250 is connected to the air inlet cavity 213, the number of the air inlet pipe 1 240 is two, the air inlet pipe 1 240 is mounted on a fixed plate 210, and the air inlet pipe 1 240 is connected to the air inlet cavity 213, the air inlet pipe 2 280 is arranged above the air inlet pipe 1 240, and the exhaust assembly 30 is installed between the air inlet pipe 1 240 and the air inlet pipe 2 280. 0, the exhaust assembly 300 is used to pressurize the air inlet chamber 213, the motor 1 260 is installed on a fixed plate 210, the motor 1 260 is used to drive the annular filter 220 to rotate, the top of the inner partition 212 is fixedly connected to the window frame 215, the window frame 215 is slidably connected to the protective tile 230, and the middle position of the protective tile 230 is provided with an air collecting port 231, and the outer wall of a fixed plate 210 is installed with a motor 270, and the motor 270 is used to drive the protective tile 230 to slide.

[0034] Specifically, when dissipating heat, the fan in the barrel 250 supplies air flow into the cabinet 100, and the external air flow passes through the annular filter 220 from the bottom of the annular filter 220 and enters the air inlet chamber 213. The annular filter 220 filters the dust in the incoming air flow, and the air flow in the cabinet 100 enters the air inlet pipe 1 240 through the air inlet pipe 280, and then enters the exhaust chamber 214 and passes through the annular filter 220 from the inside to the outside. When dust accumulates on the annular filter 220, or the heat dissipation intensity needs to be increased, the motor 1 260 drives the annular filter 220 to rotate, so that the next part of the annular filter 220 is transferred to the position of the air inlet chamber 213, so that the position where the dust accumulation was originally filtered is rotated to the position between the air inlet chamber 213 and the exhaust chamber 214, and waits for the subsequent annular filter 220 to rotate, so that the dust accumulation position is transferred to the position of the exhaust chamber 214. The exhaust assembly 300 is then started to compress the gas in the air inlet pipe 240, thereby accelerating the gas in the connecting channel 241 to pass through the annular filter 220 and blow out the dust on the annular filter 220. The airflow in the exhaust chamber 214 is concentrated to the air collecting port 231 and blown out by the setting of the protective tile 230 and the air collecting port 231, thereby increasing the speed of the airflow blowing out in the exhaust chamber 214, facilitating the airflow flushing of the annular filter 220, and avoiding the blockage of the annular filter 220. The protective tile 230 is driven to slide by the motor 270, thereby driving the air collecting port 231 to swing, so as to achieve the cleaning of the part of the annular filter 220 located in the exhaust chamber 214. Through this reactive power compensation device, the line loss power of the distribution line is automatically adjusted according to external environmental factors in the smart grid, thereby achieving dynamic, efficient and intelligent reactive power compensation effects.

[0035] Example 1

[0036] like Figures 4 to 7As shown, in this embodiment, the fan-shaped arcs of the air inlet chamber 213 and the exhaust chamber 214 are both less than ninety degrees, and a circular shaft 271 is rotatably connected between the two sides of the two fixed plates 210. A friction wheel 272 is fixedly mounted on the circular shaft 271. The friction wheel 272 is used to squeeze and contact with the protective tile 230. The two circular shafts 271 are transmission-connected, and the output end of the motor 270 is transmission-connected to a circular shaft 271. A friction wheel 1 261 is rotationally connected between the two fixed plates 210 in the air inlet chamber 213. The output end of the motor 1 260 is transmission-connected to the friction wheel 1 261. The friction wheel 1 261 is used to squeeze and contact with the annular filter. The nets 220 are squeezed and fitted together, a connecting channel 241 is installed between one end of the two air inlet pipes 240, an air duct 242 is installed on one side of the connecting channel 241, a closing plate 243 is slidably installed in the connecting channel 241, a push plate 244 is fixedly installed on one side of the closing plate 243, the push plate 244 is slidably connected to the air duct 242, both ends of the closing plate 243 are fitted with the inner wall of one end of the air inlet pipe 1 240, the top end of one of the two air inlet pipes 280 extends to a top corner position of the top of the cabinet 100, and the top end of the other air inlet pipe 280 extends to another top corner position of the top of the cabinet 100.

[0037] In this embodiment, the motor 1 260 drives the friction wheel 1 261 to rotate, and the friction wheel 1 261 drives the annular filter 220 to rotate and adjust its position. The motor 270 drives the other circular shaft 271 to rotate through a circular shaft 271, thereby driving the rotation of the two circular shafts 271. The arc angle of the protective tile 230 is 180 degrees, so that at least one of the two friction wheels 272 is always in contact with the protective tile 230, thereby facilitating the rotation of the protective tile 230. Through the setting of the closing plate 243, when the exhaust assembly 300 compresses the air intake pipe 1 240, the two screw rods 330 are driven in turn, so that the two air intake pipes 230 are rotated. The gas in one of the air intake pipes 240 is compressed in turn. When the gas in one of the air intake pipes 240 is compressed, the air pressure in one of the air intake pipes 240 increases, thereby pushing the push plate 244, causing the closing plate 243 to slide into the other air intake pipe 240, and closing the other air intake pipe 240 through the closing plate 243. When the gas in the other air intake pipe 240 is compressed, the air pressure pushes the closing plate 243 to move into one of the air intake pipes 240, and closes one of the air intake pipes 240, so that when one air intake pipe 240 is exhausted to the outside, the other air intake pipe 240 is closed, thereby preventing the gas from flowing back from the other air intake pipe 240.

[0038] Example 2

[0039] like Figures 6 to 8As shown, in this embodiment, the exhaust assembly 300 includes a motor 320 and an air collecting pipe 310. The air collecting pipe 310 is fixedly installed between the corresponding air inlet pipe 1 240 and the air inlet pipe 2 280, and the air collecting pipe 310 is connected to the air inlet pipe 1 240 and the air inlet pipe 2 280. The top of the air collecting pipe 310 is slidably sleeved with a push rod 340, and the bottom end of the push rod 340 is fixedly connected with a piston plate 341. The motor 320 is installed on the cabinet 100, and the motor 320 is used to bring The push rod 340 moves up and down, and the output end of the push rod 340 is transmission-connected to the screw rod 330, which is rotatably installed on the inner wall of the cabinet 100. The top of the push rod 340 is screwed together with the screw rod 330. The bottom end of the gas collecting pipe 310 is provided with a compression section 311, and the top end of the gas collecting pipe 310 is provided with an expansion section 312. The inner diameter of the compression section 311 matches the outer diameter of the piston plate 341, and the inner contour of the expansion section 312 is larger than the outer contour of the piston plate 341.

[0040] During specific implementation, motor three 320 drives screw rod 330 to rotate, screw rod 330 drives push rod 340 to move up and down, push rod 340 drives piston plate 341 to move up and down, through the setting of compression section 311 and expansion section 312, when piston plate 341 moves down into compression section 311, it closes gas collecting pipe 310, so that piston plate 341 moves down to compress gas collecting pipe 310 and intake pipe one 240, and when piston plate 341 moves up into expansion section 312, piston plate 341 releases the seal on gas collecting pipe 310, so that gas in intake pipe two 280 enters compression section 311, and when heat dissipation is normal, piston plate 341 remains in expansion section 312, so that exhaust chamber 214 always keeps close to two intake pipes two 2 80 is connected, which facilitates the natural discharge of the gas in the cabinet 100 through the air inlet pipe 1 240. Through the setting of the top ends of the two air inlet pipes 280, the gas in the cabinet 100 flows from bottom to top to the two top corners of the cabinet 100 and flows out, thereby improving the uniformity of the air flow in the cabinet 100. Through the setting of the air pressure sensor, when the annular filter 220 located in the exhaust chamber 214 is partially blocked, the gas in the cabinet 100 is not discharged smoothly, causing the air pressure in the cabinet 100 to increase. When the air pressure sensor detects that the air pressure increase exceeds the threshold, the two exhaust components 300 are started to compress the air inlet pipe 1 240, thereby cleaning the annular filter 220 and temporarily increasing the discharge speed of the gas in the cabinet 100 to reduce heat accumulation.

[0041] In the present invention, the air pressure sensor is a prior art and will not be described in detail here.

[0042] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the invention can be embodied in other specific forms without departing from the spirit or essential characteristics of the invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be included therein. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0043] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A high- and low-voltage reactive power compensation device using an intelligent heat dissipation method, comprising a cabinet (100), a mounting frame (110) installed inside the cabinet (100), the mounting frame (110) being used to install capacitors, inductors and other components, a heat dissipation component (200) installed on one side of the cabinet (100), and an air pressure sensor installed inside the cabinet (100), characterized in that: The heat dissipation assembly (200) includes There are two fixing plates (210), the two fixing plates (210) are arranged opposite to each other, an outer protective plate (211) is fixedly connected between both sides of the two fixing plates (210), an inner partition (212) is fixedly installed between the two fixing plates (210), and the inner partition (212) forms an air intake cavity (213) and an air exhaust cavity (214) between the two fixing plates (210); an annular filter (220) slidably mounted between the inner partition (212) and the two outer guard plates (211), the annular filter (220) being used to filter incoming airflow; A tube (250) is mounted on a fixed plate (210), a fan is installed in the tube (250), and the tube (250) is in communication with the air inlet cavity (213); There are two air intake pipes (240) installed on a fixed plate (210), and the air intake pipe (240) is connected to the air intake cavity (213). An air intake pipe (280) is provided above the air intake pipe (240). An exhaust assembly (300) is installed between the air intake pipe (240) and the air intake pipe (280). The exhaust assembly (300) is used to pressurize the air intake cavity (213). Motor 1 (260) is mounted on a fixed plate (210), and the motor 1 (260) is used to drive the annular filter (220) to rotate; The exhaust assembly (300) includes a motor three (320) and an air collecting pipe (310). The air collecting pipe (310) is fixedly installed between the corresponding air inlet pipe one (240) and the air inlet pipe two (280), and the air collecting pipe (310) is connected to the air inlet pipe one (240) and the air inlet pipe two (280). The top end of the air collecting pipe (310) is slidably sleeved with a push rod (340), and the bottom end of the push rod (340) is fixedly connected with a piston plate (341). The motor three (320) is installed on the cabinet (100), and the motor three (320) is used to drive the push rod (340) to move up and down.

2. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 1 is characterized in that: The top end of the inner partition (212) is fixedly connected to a window frame (215), a protective tile (230) is slidably connected to the window frame (215), a gas collecting port (231) is provided at the middle position of the protective tile (230), and a second motor (270) is installed on the outer side wall of one of the fixed plates (210), and the second motor (270) is used to drive the protective tile (230) to slide.

3. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 2 is characterized in that: The fan-shaped arcs of the air inlet cavity (213) and the exhaust cavity (214) are both less than ninety degrees. A circular shaft (271) is rotatably connected between the two sides of the two fixed plates (210). A second friction wheel (272) is fixedly mounted on the circular shaft (271). The second friction wheel (272) is used for extrusion contact with the protective tile (230). The two circular shafts (271) are transmission-connected, and the output end of the second motor (270) is transmission-connected to one circular shaft (271).

4. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 1 is characterized in that: A friction wheel (261) is rotatably connected between the two fixed plates (210) and located in the air inlet chamber (213). The output end of the motor (260) is transmission-connected to the friction wheel (261). The friction wheel (261) is used to squeeze and fit with the annular filter (220).

5. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 1 is characterized in that: A communication channel (241) is installed between one end of the two air inlet pipes (240), an air duct (242) is installed on one side of the communication channel (241), a closing plate (243) is slidably installed in the communication channel (241), a push plate (244) is fixedly installed on one side of the closing plate (243), and the push plate (244) is slidably connected to the air duct (242).

6. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 5, characterized in that: Both ends of the closing plate (243) fit into the inner wall of one end of the air inlet pipe (240).

7. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 1 is characterized in that: The top end of one of the two air inlet pipes (280) extends to a top corner position of the top end of the cabinet (100), and the top end of the other air inlet pipe (280) extends to another top corner position of the top end of the cabinet (100).

8. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 1 is characterized in that: The output end of the push rod (340) is transmission-connected with a screw rod (330), and the screw rod (330) is rotatably mounted on the inner wall of the cabinet (100), and the top end of the push rod (340) is screw-connected with the screw rod (330).

9. The high and low voltage reactive power compensation device using an intelligent heat dissipation method according to claim 1 is characterized in that: The bottom end of the gas collecting pipe (310) is provided with a compression section (311), and the top end of the gas collecting pipe (310) is provided with an expansion section (312). The inner diameter of the compression section (311) matches the outer diameter of the piston plate (341), and the inner contour of the expansion section (312) is larger than the outer contour of the piston plate (341).

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