Portable negative oxygen ion generating equipment externally connected with air source

Abstract

The utility model discloses portable negative oxygen ion generating equipment externally connected with an air source, which comprises an equipment body, and the equipment body comprises a generator and a water bottle arranged at the lower part of the generator; the generator comprises an insertion pipe arranged on one side and a siphon arranged on the lower portion, and the siphon is inserted into the water bottle. The inserting pipe is inserted into the output port, high-pressure air is input into the generator, negative pressure is generated, water is sucked into the generator through the siphon, the water is cut and crushed by the high-pressure air to form negative oxygen ions, and the negative oxygen ions are discharged to the outside through the output pipe on the generator. High-pressure air provided in a centralized mode is used, so that the negative oxygen ion generating equipment can be connected at any time, the negative oxygen ion concentration can be increased at any time, connection can be cut off at any time for replacement, and operation is very convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of negative oxygen ion generating equipment, in particular to a portable negative oxygen ion generating equipment connected to an external air source. Background Art

[0002] Negative oxygen ions have the functions of strengthening immunity, preventing and recovering from diseases, regulating the body's internal rules, inhibiting aging, and preventing infection. In the prior art, negative oxygen ion generating equipment often uses the principle of air excitation to generate negative oxygen ions, that is, using high-pressure air to impact the liquid, thereby generating negative oxygen ions. The existing negative oxygen ion generating equipment is mainly composed of a generator, an air compressor, and a water bottle that supplies water to the generator. The air compressor provides a stable high-speed airflow for the negative oxygen ion generator. During use, the air compressor needs to draw in external air, compress it to obtain high-pressure air, and then transport the high-pressure air to the negative oxygen ion generator. The high-pressure air input by the air compressor impacts and tears up the liquid transported by the water bottle in the generator, thereby generating negative oxygen ions.

[0003] Each of the above-mentioned negative oxygen ion generating devices needs to be separately configured with an air compressor, which makes the entire negative oxygen ion generating device large and bulky. When the negative oxygen ion concentration in the room needs to be increased, the larger negative oxygen ion generating device needs to be placed indoors, which requires a large space. When a failure occurs or it is not in use, the entire negative oxygen ion generating device also needs to be removed from the room. The above operations become cumbersome due to the large size of the negative oxygen ion generating device. Utility Model Content

[0004] The purpose of the utility model is to overcome the defects of large size and insufficient portability in the prior art, and to provide a portable negative oxygen ion generating device with an external air source. The negative oxygen ion generating device uses centrally provided high-pressure air, so that the negative oxygen ion generating device can be connected at any time, the concentration of negative oxygen ions can be increased at any time, and the connection can be cut off for replacement at any time, which is very convenient to operate.

[0005] To achieve the above-mentioned purpose, the utility model provides a portable negative oxygen ion generating device with an external air source, comprising a device body, wherein the device body comprises a generator and a water bottle installed at the bottom of the generator; the generator comprises an insertion tube arranged on one side and a siphon installed at the bottom, and the siphon is inserted into the water bottle; the insertion tube is inserted into the output port, and high-pressure air is input into the interior of the generator to generate negative pressure, and water is sucked into the interior of the generator through the siphon, and is cut and crushed by the high-pressure air to form negative oxygen ions, which are discharged to the outside through the output tube on the generator.

[0006] Preferably, an external air source is further included, on which a plurality of output ports for high-pressure air output are provided; the external air source is connected to the plurality of output ports via an air delivery pipe, and a control valve is also provided at one end of the connection between the plurality of output ports and the air delivery pipe.

[0007] Preferably, the generator comprises an outer shell installed outside, and an insertion tube is provided on one side of the outer shell; the water bottle is provided with an upper end opening, and the siphon tube directly passes through the upper end opening and is inserted into the interior of the water bottle.

[0008] Preferably, the lower portion of the outer shell is provided with an internal thread; the upper end opening is provided with an external thread, and the upper end opening is inserted into the interior of the outer shell to achieve a threaded connection.

[0009] Preferably, a vertical liquid inlet is installed on the upper part of the outer shell, and the vertical liquid inlet is connected to the siphon tube via a right-angle connector, and the siphon tube passes through the outer shell and is inserted into the interior of the water bottle; under the action of negative pressure, the water in the water bottle passes through the siphon tube, the right-angle connector and the vertical liquid inlet in sequence, and flows out downward from the end of the vertical liquid inlet.

[0010] Preferably, the generator also includes a first support plate installed inside, the first support plate is provided with a first through hole, a vertical liquid inlet is installed inside the first through hole, and a high-speed airflow annular outlet connected with the insertion tube is installed between the vertical liquid inlet and the first through hole; the high-speed airflow annular outlet sprays high-pressure air to generate negative pressure at the end of the vertical liquid inlet, so that water flows vertically downward from the end of the vertical liquid inlet, and is cut and crushed by the high-speed airflow annular shape to form negative oxygen ions, a part of the negative oxygen ions is discharged to the outside through the output pipe on the generator, and the other part is re-condensed into water and flows back to the water bottle.

[0011] Preferably, a second annular inclined surface is provided on the side of the vertical liquid inlet portion, and the second annular inclined surface guides the high-speed airflow into the high-speed airflow annular outlet; a first annular inclined surface is provided on the upper side of the first through hole, and an inclined chamfered surface is provided at the end of the vertical liquid inlet portion, and the second annular inclined surface guides the high-speed airflow inclined surface to contract, and obliquely cuts the water molecules at the end of the vertical liquid inlet portion along the first annular inclined surface and the inclined chamfered surface.

[0012] Preferably, a second support plate for impact noise reduction is installed at the lower part of the first support plate, and an impact filter is provided under the second support plate. The impact filter condenses the crushed water mist into water again and flows it back into the water bottle.

[0013] Preferably, a plurality of U-shaped grooves are provided around the first support plate, and the negative oxygen ions at the lower part of the first support plate enter the upper part of the outer shell through the U-shaped grooves. The generator also includes a sealing cover installed on the upper part of the outer shell, and the sealing cover guides the negative oxygen ions into the output pipe and is discharged to the outside. A safety valve is also installed on the sealing cover, and the safety valve is connected to the output pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] When the utility model is in use, it is only necessary to find an external air source and insert the insertion tube into the output port for high-pressure air output, so that the high-pressure air is input into the generator and negative pressure is generated. Water is sucked into the generator through the siphon and cut and crushed by the high-pressure air to form negative oxygen ions, which are discharged to the outside through the output tube on the generator. Several equipment bodies can be connected to the external air source at any time to generate negative oxygen ions, so that the indoor negative oxygen ion concentration can be increased at any time; the connection can also be cut off at any time for replacement, and the operation is very convenient; at the same time, due to the removal of a separate air compressor, the speed of the equipment body is reduced, making it more portable, convenient to carry and transport, which can greatly reduce the space occupied indoors, and the placement position can be changed at will, playing the role of interior decoration, making the interior more beautiful. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic diagram of the structure in which the external gas source and the device body provided by the utility model are plugged together;

[0018] Figure 2 It is an exploded schematic diagram of the external gas source and the device body provided by the utility model being plugged together;

[0019] Figure 3 It is a structural schematic diagram of the device body provided by the utility model;

[0020] Figure 4 It is an exploded schematic diagram of the device body provided by the utility model;

[0021] Figure 5 It is an exploded schematic diagram of the generator provided by the utility model;

[0022] Figure 6It is a cross-sectional view of the generator provided by the utility model;

[0023] Figure 7 yes Figure 6 A magnified schematic diagram of center A.

[0024] Included in the figure are:

[0025] 1. Equipment body; 2. External gas source; 22. Output port; 3. Generator; 4. Water bottle; 31. Insertion tube; 32. Siphon; 33. Output tube; 21. Air delivery pipe; 23. Control valve; 34. Outer shell; 41. Upper end opening; 341. Internal thread; 411. External thread; 51. Vertical liquid inlet; 52. Right-angle connector; 61. First support plate; 62. First through hole; 63. High-speed airflow annular outlet; 511. Second annular inclined surface; 621. First annular inclined surface; 512. Inclined chamfered surface; 65. Second support plate; 64. Impact filter; 73. U-shaped groove; 71. Sealing cover; 72. Safety valve. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in this embodiment of the utility model to clearly and completely describe the technical solution in this embodiment of the utility model. Obviously, the described embodiment is one embodiment of the utility model, not all embodiments of the utility model. Based on this embodiment of the utility model, all other embodiments of the utility model obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] Please refer to Figures 1 to 7 The utility model provides a portable negative oxygen ion generating device with an external air source.

[0028] like Figure 1 As shown, the external gas source 2 stores high-pressure air, and the external gas source 2 is connected to an air compressor. The air compressor outputs high-pressure gas and stores it in the external gas source 2. The external gas source 2 delivers the high-pressure air through a delivery air pipe 21. The end of the delivery air pipe 21 is provided with a plurality of output ports 22 for outputting high-pressure air; one end of the plurality of output ports 22 connected to the delivery air pipe 21 is also provided with a control valve 23, and the control valve 23 is used to control the output pressure and output shutoff. The control valve 23 can be a combination of a pressure regulating valve and a pressure gauge, which is used to display the pressure and adjust the output pressure; it can also be a separate shut-off valve, which is used to shut off.

[0029] like Figure 1As shown, the device body 1 is installed on one side of the external air source 2. Generally, for the purpose of concealing the design indoors, only the output port 22 can be seen. The output port 22 adopts a quick connection port, which is convenient for quick insertion and connection. The high-pressure air is output to the inserted component, and the existing quick connection port can be used.

[0030] like Figure 1 As shown, the device body 1 includes a generator 3 and a water bottle 4 installed at the bottom of the generator 3; the generator 3 includes an insertion tube 31 arranged on one side and a siphon 32 installed at the bottom, and the siphon 32 is inserted into the water bottle 4; the insertion tube 31 is inserted into the output port 22, and high-pressure air is input into the generator 3 to generate negative pressure, and water is sucked into the generator 3 through the siphon 32, and is cut and crushed by the high-pressure air to form negative oxygen ions, and the negative oxygen ions are discharged to the outside through the output tube 33 on the generator 3.

[0031] In interior decoration, multiple output ports 22 can be reserved and can be installed on the wall or integrated into furniture. When in use, it is only necessary to insert the insertion tube 31 into the output port 22 to connect; further, several device bodies 1 can be connected to the external gas source 2 at any time to generate negative oxygen ions, thereby increasing the indoor negative oxygen ion concentration at any time; the connection can also be cut off at any time, and it is only necessary to pull out the insertion tube 31 from the output port 22, which is very convenient to operate.

[0032] like Figure 4 As shown, the generator 3 includes an outer shell 34 installed outside, and an insertion tube 31 is provided on one side of the outer shell 34; the water bottle 4 is provided with an upper end opening 41, and the siphon tube 32 directly passes through the upper end opening 41 and is inserted into the water bottle 4.

[0033] Further, such as Figure 4 As shown, in this embodiment, the outer shell 34 and the water bottle 4 are both arc-shaped, and the outer shell 34 and the water bottle 4 are assembled into a sphere, which is more beautiful in shape; further, the lower part of the water bottle 4 is also equipped with a decorative part 49 for decorative purposes, making the device body 1 more beautiful, and the decorative part 49 covers the lower part of the water bottle 4, and has a stable supporting lower part, so that the device body 1 can be placed alone, which plays a decorative role. The generator 3 and the water bottle 4 can also be designed into other structures with beautiful shapes, thereby increasing the beauty of the room.

[0034] like Figure 4 As shown, the first connection method between the generator 3 and the water bottle 4 is: the lower part of the outer shell 34 is provided with an internal thread 341; the upper end opening 41 is provided with an external thread 411, and the upper end opening 41 is inserted into the interior of the outer shell 34, and the external thread 411 is threadedly connected with the internal thread 341, so that the generator 3 and the water bottle 4 are stably threadedly connected.

[0035] The second connection method between the generator 3 and the water bottle 4: the lower part of the outer shell 34 is provided with an internal rotating buckle, and the upper part of the upper end opening 41 is provided with an external rotating buckle; the upper end opening 41 is inserted into the inner part of the outer shell 34 and connected by means of a rotating buckle.

[0036] like Figure 5 As shown, a vertical liquid inlet 51 is installed on the upper part of the outer shell 34, and the insertion tube 31 is on one side of the outer shell 34. The insertion tube 31 is connected to the outer shell 34 to input high-pressure air into the lower part of the outer shell 34, thereby realizing gas-liquid separation.

[0037] Furthermore, the vertical liquid inlet 51 is connected to the siphon tube 32 through a right-angle connector 52, the siphon tube 32 is inserted into the lower end of the right-angle connector 52, and the vertical liquid inlet 51 is inserted into one side of the right-angle connector 52. The siphon tube 32, the right-angle connector 52 and the vertical liquid inlet 51 present a U-shaped structure, achieving the effect of liquid being sucked from the side and flowing out from the middle.

[0038] In order to achieve the above effect, the siphon tube 32 is inserted into the water bottle 4 through the outer shell 34, and contacts the water inside the water bottle 4; under the action of negative pressure, the water in the water bottle 4 passes through the siphon tube 32, the right-angle connector 52 and the vertical liquid inlet portion 51 in sequence, and flows downward from the end of the vertical liquid inlet portion 51.

[0039] like Figure 6 As shown, the upper part of the generator 3 is cylindrical, and a first support plate 61 is fixedly installed inside, and the first support plate 61 can be clamped on the cylinder; the first support plate 61 is provided with a first through hole 62, and the vertical liquid inlet 51 is installed inside the first through hole 62; the first support plate 61 is a circular plate, and the first through hole 62 is a circular hole; further, the diameter of the first through hole 62 is larger than the diameter of the end of the vertical liquid inlet 51, so a high-speed airflow annular outlet 63 is provided between the vertical liquid inlet 51 and the first through hole 62; the high-speed airflow annular outlet 63 is connected to the insertion tube 31, and the high-speed airflow annular outlet 63 sprays high-pressure air to generate negative pressure at the end of the vertical liquid inlet 51, so that the water in the return water bottle 4 passes through the siphon 32, the right-angle connector 52 and the vertical liquid inlet 51 in sequence, and flows out vertically downward, and is cut and crushed by the high-speed airflow annularly to form negative oxygen ions, a part of the negative oxygen ions is discharged to the outside through the output pipe 33 on the generator 3, and the other part is re-condensed into water and flows back to the water bottle 4.

[0040] Further, such as Figure 7As shown, the water column output by the vertical liquid inlet portion 51 is surrounded by an annular high-speed airflow, and the annular high-speed airflow performs an annular impact on the water column, tearing, impacting, cutting, and smashing the water molecules, so that the airflow and the water molecules are fully mixed, thereby generating more negative oxygen ions; the negative oxygen ions produced by the annular high-speed airflow cutting, smashing, and tearing the water molecules are many times that of the point-like surface impact, and more negative oxygen ions can be generated, resulting in a high concentration of negative oxygen ions output by the output tube 33.

[0041] like Figure 7 As shown, a second annular inclined surface 511 is provided on the side of the vertical liquid inlet portion 51, and the second annular inclined surface 511 guides the high-speed airflow into the high-speed airflow annular outlet 63; the area of ​​the lower port of the second annular inclined surface 511 is much smaller than the area of ​​the upper port, so that when the high-speed airflow enters the high-speed airflow annular outlet 63, the high-speed airflow velocity can be increased several times.

[0042] In order to guide the direction of the high-speed airflow so that it can have a directional annular impact on the water column, an airflow guiding groove can be provided on the high-speed airflow annular outlet 63 or the second annular inclined surface 511 to adjust the direction of the high-speed airflow; this is conducive to producing more negative oxygen ions.

[0043] In this embodiment, if Figure 7 As shown, a first annular inclined surface 621 is provided on the upper side of the first through hole 62, and at the same time, an inclined chamfered surface 512 is provided at the end of the vertical liquid inlet 51. When the high-speed airflow enters the high-speed airflow annular outlet 63, the second annular inclined surface 511 guides the high-speed airflow inclined surface to contract or compress, and cuts, impacts, and crushes the water molecules at the end of the vertical liquid inlet 51 along the first annular inclined surface 621 and the inclined chamfered surface 512, thereby fully mixing the airflow and the water molecules and generating more negative oxygen ions. The effect is better than the above-mentioned ordinary annular impact, and more negative oxygen ions are generated.

[0044] like Figure 6 As shown, a second support plate 65 for impact noise reduction is installed at the lower part of the first support plate 61. The second support plate 65 can be made of flexible noise reduction material components, thereby reducing the noise generated by the impact of high-speed airflow and having a silent effect.

[0045] like Figure 6 As shown, an impact filter 64 is provided under the second support plate 65 , and the impact filter 64 condenses the crushed water mist into water again, which flows back into the water bottle 4 , thereby realizing the recycling of water and ensuring that the water resources in the water bottle 4 are fully utilized.

[0046] like Figure 3As shown, the water bottle 4 is provided with vertical scale lines, and by observing the scale lines, the user can easily understand the water level in the water bottle 4, and ensure that the device operates normally at an appropriate water level. When the water level in the water bottle 4 is too low, the threaded connection between the outer shell 34 and the water bottle 4 is opened, the water bottle 4 is taken out, and water is added to the inside of the water bottle 4.

[0047] like Figure 5 As shown, a plurality of U-shaped grooves 73 are provided around the first support plate 61, and the negative oxygen ions at the lower part of the first support plate 61 enter the upper part of the outer shell 34 through the U-shaped grooves 73. The generator 3 also includes a sealing cover 71 installed on the upper part of the outer shell 34, and the sealing cover 71 guides the negative oxygen ions into the output pipe 33 and is discharged to the outside, wherein the presence of the sealing cover 71 can help prevent negative oxygen ions or water vapor and other substances from escaping from the device, thereby maintaining the closedness of the system.

[0048] like Figure 5 As shown, the sealing cover 71 is also provided with a safety valve 72, which is connected to the output pipe 33. The safety valve 72 is provided to release excessive gas when the air pressure inside the system increases abnormally, so as to avoid damage to the equipment due to the increase in air pressure. This is a protective measure to prevent equipment damage or safety hazards caused by excessive pressure.

[0049] The use process of the device body 1 is as follows: first, the insertion tube 31 is inserted into the output port 22, and high-pressure air is input into the generator 3, and is ejected from the high-speed airflow annular outlet 63 to impact the end of the vertical liquid inlet 51, thereby generating negative pressure under the drive of the high-speed airflow; secondly, the water in the water bottle 4, under the action of the negative pressure, passes through the siphon 32, the right-angle connector 52 and the vertical liquid inlet 51 in sequence, and flows downward from the end of the vertical liquid inlet 51; thirdly, the second annular inclined surface 511 guides the high-speed airflow inclined surface to contract or The airflow is compressed, and the water molecules at the end of the vertical liquid inlet portion 51 are obliquely cut, impacted, and crushed along the first annular inclined surface 621 and the inclined chamfered surface 512, so as to fully mix the airflow and the water molecules and produce more negative oxygen ions; finally, a part of the negative oxygen ions enter the upper part of the outer shell 34 through the U-shaped groove 73, and the sealing cover 71 guides the negative oxygen ions into the output pipe 33 and is discharged to the outside, while the other part of the negative oxygen ions moves downward with the airflow, passes through the noise reduction of the second support plate 65, impacts the filter screen 64, condenses into water again, and flows back into the water bottle 4.

[0050] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited by the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principle of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A portable negative oxygen ion generating device with an external air source, characterized in that: The device comprises a device body (1), wherein the device body (1) comprises a generator (3) and a water bottle (4) mounted at the bottom of the generator (3); the generator (3) comprises an insertion tube (31) arranged at one side and a siphon tube (32) mounted at the bottom, wherein the siphon tube (32) is inserted into the water bottle (4); the insertion tube (31) is inserted into an output port (22), high-pressure air is input into the generator (3), and negative pressure is generated, water is sucked into the generator (3) through the siphon tube (32), and water is cut and crushed by the high-pressure air to form negative oxygen ions, and the negative oxygen ions are discharged to the outside through an output tube (33) on the generator (3).

2. The portable negative oxygen ion generating device with an external air source according to claim 1, characterized in that: It also comprises an external gas source (2), the external gas source (2) being provided with a plurality of output ports (22) for outputting high-pressure air; the external gas source (2) and the plurality of output ports (22) are connected via a delivery gas pipe (21), and a control valve (23) is also provided at one end where the plurality of output ports (22) are connected to the delivery gas pipe (21).

3. The portable negative oxygen ion generating device with an external air source according to claim 1, characterized in that: The generator (3) comprises an outer shell (34) mounted on the outside, and an insertion tube (31) is provided on one side of the outer shell (34); the water bottle (4) is provided with an upper opening (41), and the siphon tube (32) directly passes through the upper opening (41) and is inserted into the interior of the water bottle (4).

4. The portable negative oxygen ion generating device with an external air source according to claim 3, characterized in that: The lower portion of the outer shell (34) is provided with an internal thread (341); the upper end opening (41) is provided with an external thread (411); the upper end opening (41) is inserted into the interior of the outer shell (34) to achieve a threaded connection.

5. The portable negative oxygen ion generating device with an external air source according to claim 3, characterized in that: A vertical liquid inlet (51) is arranged on the upper part of the outer shell (34); the vertical liquid inlet (51) is connected to the siphon tube (32) via a right-angle connector (52); the siphon tube (32) passes through the outer shell (34) and is inserted into the interior of the water bottle (4); under the action of negative pressure, the water in the water bottle (4) passes through the siphon tube (32), the right-angle connector (52) and the vertical liquid inlet (51) in sequence and flows downwardly out from the end of the vertical liquid inlet (51).

6. The portable negative oxygen ion generating device with an external air source according to claim 5, characterized in that: The generator (3) further comprises a first support plate (61) mounted inside, the first support plate (61) being provided with a first through hole (62), a vertical liquid inlet portion (51) being mounted inside the first through hole (62), and a high-speed airflow annular outlet (63) being mounted between the vertical liquid inlet portion (51) and the first through hole (62) and being connected to the insertion tube (31); the high-speed airflow annular outlet (63) ejects high-pressure air to generate negative pressure at the end of the vertical liquid inlet portion (51), so that water flows vertically downward from the end of the vertical liquid inlet portion (51) and is cut and crushed by the high-speed airflow annularly to form negative oxygen ions, a portion of which is discharged to the outside through the output pipe (33) on the generator (3), and the other portion is re-condensed into water and flows back to the water bottle (4).

7. The portable negative oxygen ion generating device with an external air source according to claim 6, characterized in that: A second annular inclined surface (511) is provided on the side of the vertical liquid inlet portion (51), and the second annular inclined surface (511) guides the high-speed airflow to enter the high-speed airflow annular outlet (63); a first annular inclined surface (621) is provided on the upper side of the first through hole (62), and an inclined chamfered surface (512) is provided at the end of the vertical liquid inlet portion (51), and the second annular inclined surface (511) guides the high-speed airflow to contract at an inclined surface, and performs inclined cutting on water molecules at the end of the vertical liquid inlet portion (51) along the first annular inclined surface (621) and the inclined chamfered surface (512).

8. The portable negative oxygen ion generating device with an external air source according to claim 6, characterized in that: A second support plate (65) for impact noise reduction is installed at the lower part of the first support plate (61), and an impact filter (64) is provided below the second support plate (65). The impact filter (64) condenses the crushed water mist into water again, which flows back into the water bottle (4).

9. The portable negative oxygen ion generating device with an external air source according to claim 6, characterized in that: A plurality of U-shaped grooves (73) are further provided around the first support plate (61), and the negative oxygen ions at the lower portion of the first support plate (61) enter the upper portion of the outer shell (34) through the U-shaped grooves (73). The generator (3) further comprises a sealing cover (71) installed at the upper portion of the outer shell (34), and the sealing cover (71) guides the negative oxygen ions into the output pipe (33) to be discharged to the outside. A safety valve (72) is also installed on the sealing cover (71), and the safety valve (72) is connected to the output pipe (33).

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