CN110017914B - Flow-guiding heat-dissipating dry body temperature calibrator - Google Patents
Flow-guiding heat-dissipating dry body temperature calibrator Download PDFInfo
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- CN110017914B CN110017914B CN201810018505.9A CN201810018505A CN110017914B CN 110017914 B CN110017914 B CN 110017914B CN 201810018505 A CN201810018505 A CN 201810018505A CN 110017914 B CN110017914 B CN 110017914B
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- 230000036760 body temperature Effects 0.000 title claims description 16
- 238000001816 cooling Methods 0.000 claims abstract description 29
- 230000017525 heat dissipation Effects 0.000 claims abstract description 19
- 238000009413 insulation Methods 0.000 claims description 9
- 238000002791 soaking Methods 0.000 claims description 9
- 238000009434 installation Methods 0.000 claims description 4
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
- G01K15/00—Testing or calibrating of thermometers
- G01K15/005—Calibration
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/20009—Modifications to facilitate cooling, ventilating, or heating using a gaseous coolant in electronic enclosures
- H05K7/20136—Forced ventilation, e.g. by fans
- H05K7/20145—Means for directing air flow, e.g. ducts, deflectors, plenum or guides
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Microelectronics & Electronic Packaging (AREA)
- General Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Testing Of Individual Semiconductor Devices (AREA)
- Measuring Temperature Or Quantity Of Heat (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a flow-guiding heat-dissipating trunk temperature calibrator, and belongs to the field of temperature calibration. The device comprises a shell (6), a furnace body (1) positioned in the shell (6) and a cooling fan (16) positioned below the furnace body (1), wherein a tested device (9) is inserted into the furnace body, at least one air flow generating device is arranged in the shell (6), the air flow generating device is positioned at the periphery of the furnace body (1), generated air flow blows to a handle (91) of the tested device, and the air flow generating device is one or a combination of a plurality of air channels C2, a guide fan (21), an air pump and a blower. The air flow generated by the air flow generating device can be guided to the handle of the tested device to cool the handle, so that the failure of the sensor in the handle caused by high temperature is avoided, the heat dissipation of the electronic devices in the instrument is facilitated, and the service life of the temperature calibrator is prolonged.
Description
Technical Field
The invention belongs to the field of temperature calibration, and particularly relates to a dry body temperature calibrator, in particular to a dry body temperature calibrator with a diversion heat dissipation function.
Background
The stem temperature calibrator is used for calibrating a thermometer, a thermal switch and the like, is widely applied to industrial sites, metering places and laboratories of various industries, and has a relatively wide market.
The current portable body temperature check gauge is equipped with the furnace body and conveniently carries the casing generally, and the furnace body includes: soaking block (furnace core), constant temperature block with heating or/and refrigerating device, heat insulating layer and cooling fan. The cavity in the middle of the soaking block is used for accommodating a detected device such as a detected thermometer or a thermal switch; the constant temperature block and the heat insulation layer are separated by a certain distance to form a heat dissipation channel C1, and air flow generated by a cooling fan arranged at the bottom end of the furnace body flows from the bottom to the top of the heat dissipation channel, so that cooling and heat dissipation of the inside of the furnace body are realized. However, since the temperature inside the furnace body is high, the temperature of the gas flowing out of the heat dissipation channel C1 is also high, which in turn causes the temperature of the handle of the device to be measured in the vicinity of the furnace mouth to be too high, which in turn causes the sensor inside the handle of the device to be measured to be damaged.
Disclosure of Invention
The invention aims to provide a dry body temperature calibrator with a flow guiding and heat dissipating function aiming at the defects.
The technical scheme of the invention is as follows:
The utility model provides a water conservancy diversion heat dissipation stem body temperature check gauge, its includes shell (6), is located furnace body (1) and be located cooling fan (16) of furnace body (1) below in shell (6), and device under test (9) inserts the furnace body, and the inside of shell (6) is provided with at least one air current generating device, and this air current generating device is located the periphery of furnace body (1), air current that air current generating device produced blows handle (91) to device under test.
The air flow generating device is one or the combination of a plurality of air channels C2, a diversion fan (21), an air pump and a blower.
The airflow generating device is single and is arranged at one side of the furnace body; or the plurality of air flow generating devices are distributed and arranged on the periphery of the furnace body.
The airflow generating device comprises a diversion fan (21), an air pump or a blower which are positioned on one side or multiple sides of the furnace body.
The air flow generating device is arranged on a mounting frame or a mounting plate positioned on one side of the furnace body, and the mounting frame or the mounting plate is fixed on a shell base (5) of the dry body temperature calibrator.
The flow-guiding heat-dissipating dry body temperature calibrator further comprises a control board bracket (22) for installing the control board (2), the air flow generating device is installed on an installation board, the installation board is mechanically fixed at the top end of the control board bracket (22), and the bottom end of the control board bracket (22) is fixed on the shell base (5).
The air flow generating device comprises one or more air channels C2 which are arranged on the periphery of the furnace body (1) and communicated with the cooling fan (16) or other air sources, and a combination of the air channels C2 and a diversion fan (21), an air pump or an air blower which are arranged inside the air channels C2.
The gas channel C2 is a cuboid cylinder, a cylinder or an air guide pipe which is positioned at one side of the furnace body. Or alternatively
The air channel C2 is a cuboid barrel surrounded by the control board support (22) and the control board (2), wherein the control board support (22) is of a rectangular groove structure, the control board (2) partially covers the side opening of the rectangular groove structure, a fan mounting plate is arranged at the air outlet of the cuboid barrel, the guide fan (21) is mechanically fixed below the fan mounting plate, and the fan mounting plate is provided with an opening corresponding to the position of the guide fan (21).
The flow-guiding heat-dissipating dry body temperature calibrator is characterized in that a furnace body base (11) is arranged below the furnace body (1), a cooling fan (16) is arranged in a lower cavity of the furnace body base (11), and at least one vent hole is formed in the side wall of the furnace body base (11) adjacent to the gas channel so as to form a gas channel C3, so that air flow generated by the cooling fan (16) flows to an air inlet below the gas channel C2.
The air flow generating device is only an air channel C2 which is arranged on one side of the furnace body and is communicated with the cooling fan or an external air source.
The air flow direction generated by the guide fan (21), the air pump or the blower is vertical upwards or inclined to one side of the furnace body.
By adopting the scheme, the air flow generating device is formed by one or the combination of more of the air channel C2, the diversion fan, the air pump and the blower, and the air flow generated by the air flow generating device can be guided and acted on the handle of the tested device to cool the handle, so that the failure of the sensor in the handle caused by high temperature is avoided, the heat dissipation of the electronic devices in the instrument is facilitated, and the service life of the temperature calibrator is prolonged.
Drawings
FIG. 1A is an exploded view of a flow-directing heat dissipating stem temperature calibrator (cryogenically oven) of the present invention;
FIG. 1B is an exploded view of a flow-directing and heat dissipating stem temperature calibrator (high temperature furnace) of the present invention;
FIG. 2 is a schematic view of the structure of the furnace body in the present invention;
FIG. 3 is a schematic diagram of an air flow generating device with air channels and a combined fan according to the present invention;
FIG. 4 is a schematic cross-sectional view of a flow-guiding heat-dissipating stem temperature calibrator according to the present invention;
fig. 5 is a perspective view of the airflow generating device of the present invention, in which the guide fan is mounted on the control board bracket.
Wherein, the reference numerals are as follows:
the furnace body 1, the system board module 3, the measuring board module 4 and the shell base 5;
a cooling fan 16, a furnace body base 11, a constant temperature block 13, a heat insulation layer 14 and a furnace mouth 15;
A control board 2, a guide fan 21, a control board bracket 22 and a mounting plate 23;
a housing 6, a jack 61; the device under test 9, the device under test handle 91.
Detailed Description
The invention provides a dry body temperature calibrator with flow guiding and heat dissipating functions, referring to fig. 1A and 1B, the calibrator comprises a housing 6 of the calibrator, a furnace body 1 arranged in the housing 6, and a control board 2 assembled in the housing 6 and parallel to the furnace body 1; the housing 6 is provided with a jack 61 opposite to the furnace mouth 15 of the furnace body 1, and the jack 61 allows the device 9 to be tested to extend into.
As shown in fig. 2 and 3, the furnace body 1 comprises a soaking block, a constant temperature block 13 and a heat insulation layer 14 arranged on the periphery of the constant temperature block 13. A furnace body base 11 is arranged below the furnace body 1, and a constant temperature block 13 and a heat insulation layer 14 are arranged on the base 11. A cooling fan 16 is installed in the cavity at the lower part of the base 11. The constant temperature block 13 surrounds a soaking block (furnace core), the upper end of the soaking block is provided with an opening for accommodating the device 9 to be tested, namely a furnace mouth 15, and the constant temperature block 13 also comprises a heat source in thermal contact with the soaking block; the heat insulation layer 14 is arranged around the constant temperature block 13, a certain distance is formed between the heat insulation layer 14 and the constant temperature block 13 to form a heat dissipation channel C1 inside the furnace body, and when the furnace body 1 needs to be cooled, the cooling fan 16 at the bottom of the furnace body 1 works to enable hot air generated by the furnace core to be discharged from an exhaust hole above the furnace body 1 through the heat dissipation channel C1 (the air flow inside the furnace body is shown by a thin arrow in FIG. 3).
In the invention, an airflow generating device which is used for guiding and radiating the instrument and can generate directional airflow is arranged between the peripheral heat insulation layer 14 of the furnace body 1 and the shell 6. The air flow generating device is positioned in the shell 6 and outside the furnace body 1.
The number of the air flow generating devices is not limited, and the air flow generating devices can be arranged according to actual needs, and the positions of the air flow generating devices are set so that the air flow generated by the air flow generating devices can act on the handle 91 of the tested device 9 to enable the handle 91 to be cooled. It is understood that a single air flow generating device may be provided at one side of the furnace body 1, or a plurality of air flow generating devices may be provided at the periphery of the furnace body 1, and further, a plurality of air flow generating devices may be provided at equal intervals; when the furnace body 1 is a rectangular parallelepiped, the air flow generating means may be disposed adjacent to one or more sides of the furnace body 1.
One embodiment of the gas flow generating device is a gas channel C2 in communication with a gas source. As shown in fig. 3, one or more gas channels are arranged at the periphery of the furnace body 1. The form of the gas passage C2 is not limited as long as it can serve to guide the gas flow of the gas source to the handle of the device under test. It will be appreciated that the air source may be a cooling fan 16 at the bottom of the furnace, natural air flow outside the furnace, or other air source.
Further, the bottom end of the gas channel C2 has a gas inlet, which communicates with a gas source such that a gas flow enters the gas channel C2. The top end of the gas channel C2 has a gas outlet so that the gas flow flows to the handle 91 of the device 9 under test. Specifically, the gas channel C2 may be a rectangular cylinder surrounded by four rectangular plates, or may be a cylinder or a long conduit. When there are a plurality of gas passages C2, they may be connected to each other, and the gas outlet ends of all the gas passages C2 may face the handle 91 of the device 9 to be tested, or all the gas passages may have only one gas outlet end facing the handle 91 of the device 9 to be tested.
In one embodiment, referring to fig. 3, the gas channel C2 is a vertical cuboid channel surrounded by the control board 2 and the control board support 22, the control board support 22 is a rectangular groove structure surrounded by three rectangular long boards, the side opening of the rectangular groove structure is partially closed by the control board 2, and the upper end opening and the lower end opening of the rectangular groove structure are not closed. The gas channel C2 guides the air flow generated by the cooling fan 16 located under the furnace body from below the furnace body to the handle 91 of the device under test 9, and it is understood that the cooling fan 13 is located in the cavity of the furnace body base 11, and the side wall of the furnace body base 11 adjacent to the gas channel C2 is provided with a plurality of openings to allow the air flow generated by the cooling fan 16 to flow to the gas channel C2, for example, as shown in fig. 3, a gas channel C3 is provided between the bottom of the furnace body 1 and the base, which communicates with the cooling fan 16 and the side of the furnace body 1, so that the cavity of the base where the cooling fan 16 is located communicates with the gas channel C2 outside the furnace body through the gas channel C3, and the air flow generated by the cooling fan 16 exits the instrument housing 6 through the gas channel C3 and the gas channel C2 and can be guided to the handle 91 of the device under test 9.
Second, another embodiment of the air flow generating device is one or a combination of several of a diversion fan 21, an air pump, and a blower located at one side or multiple sides of the furnace body.
In one embodiment, the air flow generating device is a guide fan 21, an air pump or a blower provided at one side of the furnace body. It will be appreciated that a plurality of guide fans 21 may be provided on a plurality of sides of the oven body respectively, to generate air flow together to cool the handle 91 of the device under test 9. The air flow generating device is arranged on a mounting frame or a mounting plate positioned on one side of the furnace body. The height of the air flow generating device is adjusted by changing the height of the mounting frame or the position of the mounting plate. Specifically, as shown in fig. 5 and 1A, the mounting plate 23 is located above the control board support 22, and the height of the control board support 22 is lower than the height of the furnace body, so that the air guiding fan 21 mounted on the mounting plate 23 is located at one side of the furnace body and slightly lower than the height of the furnace body, so that a space beneficial to the operation of the air guiding fan 21 is formed in the housing 6, and therefore the air flow generated by the air guiding fan 21 can act on the handle 91 of the tested device 9 to perform the cooling function.
Third, another embodiment of the air flow generating device is a combination of one or more of a guide fan 21, an air pump, and a blower fan located at one side of the furnace body and an air flow channel C2. Mounting plates may be provided at the top, middle or lower portion of the air flow channel C2 to mount the guide fan 21, the air pump, and the blower. In this embodiment, as shown in fig. 3 and 4, the air channel C2 is a vertical cuboid air channel surrounded by the control board 2 and the control board support 22, the control board support 22 is a rectangular groove structure surrounded by three rectangular boards, the side opening of the control board support is partially closed by the control board 2 to form the air channel C2, the top opening of the air channel C2 is closed by a fan mounting plate, the diversion fan 21 is mounted below the fan mounting plate, and the position of the fan mounting plate corresponding to the diversion fan 21 is provided with an opening to allow the airflow generated by the diversion fan 21 and the air channel C2 to pass through. The bottom end opening of the gas passage C2 is in gas flow communication with the cooling fan 16. The cooling fan 16 is located in the cavity of the furnace body base 11, and a plurality of openings are formed in the sidewall of the furnace body base 11 adjacent to the gas channel C2 to form a gas channel C3, thereby allowing the air flow generated by the cooling fan 16 to flow to the gas channel C2.
When the airflow generating device is the guide fan 21, the guide fan 21 may be horizontally placed on one side of the furnace body 1, or may be inclined at a certain angle, so that the airflow generated by the guide fan 21 flows to the furnace body 1 more easily. Preferably, the angle of inclination of the guide fan 21 to the side of the furnace body 1 is between 0 degrees and 90 degrees, so that the fan surface of the guide fan 21 faces the furnace body 1 more.
It will be appreciated that the above air flow generating device may replace the guide fan 21 with an air pump and a blower; the rotating speed of the guide fan 21 and the working power of the air pump and the air blower can be regulated according to actual needs to generate different air quantities so as to realize different cooling effects on the handle of the tested device 9.
It will be appreciated that the housing base 5 is also provided below the housing 6, and the housing base 5 and the housing 6 cooperate up and down to form a detachable housing structure, so as to facilitate maintenance of the internal components of the stem temperature calibration apparatus, and the vent is provided below the housing base 5 to allow external gas or air source to enter the interior of the stem temperature calibration apparatus. The stem temperature calibrator of the present invention further includes a measurement plate module 4 and a system plate module 3 disposed within the housing 6. The measuring board module 4 is used for connecting measuring lines to realize the electrical measurement function of the dry body temperature calibrator. The system board module 3 is used for parameter setting and data display to realize man-machine interaction.
The invention provides a flow-guiding heat-dissipating dry body temperature calibrator, which has the working principle that: the air flow generated by the air flow generating device flows to the periphery of the air flow generating device, so that part of the air flow flows to the handle of the device to be tested, and the temperature of the part of the air flow is normal temperature, so that the high temperature of the handle of the device to be tested, which is close to the mouth end of a furnace core (soaking block), is reduced, and the hot air flow near the handle of the device to be tested is blown away from the furnace body by the air flow generated by the air flow generating device, so that the temperature of the handle of the device to be tested is reduced.
The implementation effect is as follows:
When the airflow generating device is applied to the high-temperature dry body temperature calibrator, as shown in fig. 1B, through the combined action of the diversion fan 21 and the airflow channel, when the rotation speed of the diversion fan is 6000 rpm, the temperature of the handle of the tested device is reduced from 133 to 61, and when the rotation speed of the fan is 8000rpm, the temperature of the handle is further reduced to 48.
In specific implementation, the airflow generating device provided by the invention is suitable for any existing or future newly developed various temperature check meters, furnace bodies and the like, and a person skilled in the art can make various changes according to the invention by combining the form of the specific furnace body or the temperature check meter, and the changes also belong to the disclosure of the invention.
Claims (9)
1. The utility model relates to a flow-guiding heat-dissipating dry body temperature calibrator, which comprises a shell (6), a furnace body (1) positioned in the shell (6) and a cooling fan (16) positioned below the furnace body (1), wherein a tested device (9) is inserted into the furnace body,
At least one air flow generating device is arranged in the shell (6) and is positioned at the periphery of the furnace body (1), and air flow generated by the air flow generating device blows to a handle (91) of the tested device;
The furnace body (1) comprises a soaking block, a constant temperature block (13) and a heat insulation layer (14) arranged on the periphery of the constant temperature block (13), wherein a certain distance is reserved between the heat insulation layer (14) and the constant temperature block (13) so as to form a heat dissipation channel C1 in the furnace body (1), and hot air generated by the soaking block is discharged from an exhaust hole above the furnace body (1) through the heat dissipation channel C1;
the air flow generating device is an air channel C2, an air inlet is formed in the bottom end of the air channel C2, the air inlet is communicated with the cooling fan (16) so that air flow enters the air channel C2, and an air outlet is formed in the top end of the air channel C2 so that the air flow flows to a handle (91) of the tested device; or the air flow generating device is a combination of a flow guiding mechanism positioned at one side of the furnace body (1) and a gas channel C2, the flow guiding mechanism is one or more of a flow guiding fan (21), an air pump and a blower, the top, the middle or the lower part of the gas channel C2 is provided with a mounting plate for mounting the flow guiding mechanism, and the top end of the gas channel C2 is provided with an air outlet so that air flows to a handle (91) of the tested device.
2. The heat dissipation stem temperature calibrator according to claim 1, wherein,
The airflow generating devices are single and arranged on one side of the furnace body, or the airflow generating devices are multiple and distributed on the periphery of the furnace body.
3. The heat dissipation stem temperature calibrator according to claim 1, wherein,
The air flow generating device comprises a diversion fan (21), an air pump or a blower which are positioned on the multiple sides of the furnace body.
4. The heat dissipation stem temperature calibrator according to claim 1, wherein,
The dry body temperature calibrator further comprises a control board bracket (22) for installing the control board (2), the air flow generating device is installed on an installation board, the installation board is mechanically fixed at the top end of the control board bracket (22), and the bottom end of the control board bracket (22) is fixed on the shell base (5).
5. The heat dissipation stem temperature calibrator according to claim 1, wherein,
The gas channel C2 is a cuboid cylinder or a cylinder positioned at one side of the furnace body.
6. The heat dissipation stem temperature calibrator according to claim 5, wherein,
The air channel C2 is a cuboid barrel surrounded by the control board support (22) and the control board (2), wherein the control board support (22) is of a rectangular groove structure, the control board (2) partially covers the side opening of the rectangular groove structure, a fan mounting plate is arranged at the air outlet of the cuboid barrel, the guide fan (21) is mechanically fixed below the fan mounting plate, and the fan mounting plate is provided with an opening corresponding to the position of the guide fan (21).
7. The heat dissipation stem temperature calibrator according to claim 6, wherein,
The lower part of the furnace body (1) is provided with a furnace body base (11), a cooling fan (16) is arranged in a lower cavity of the furnace body base (11), and at least one vent hole is formed on the side wall of the furnace body base (11) adjacent to the gas channel C2 so as to form a gas channel C3, so that air flow generated by the cooling fan (16) flows to an air inlet below the gas channel C2.
8. The heat dissipation stem temperature calibrator according to claim 1, wherein,
The air flow generating device is only an air channel C2 which is arranged on one side of the furnace body and is communicated with the cooling fan (16).
9. The heat spreader bar temperature calibrator of any one of claims 3 to 8, wherein,
The air flow direction generated by the diversion fan (21), the air pump or the blower is vertically upward or inclined to one side of the furnace body.
Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018505.9A CN110017914B (en) | 2018-01-09 | 2018-01-09 | Flow-guiding heat-dissipating dry body temperature calibrator |
| US16/960,990 US11959814B2 (en) | 2018-01-09 | 2019-01-07 | High-temperature dry block temperature calibrator |
| PCT/CN2019/070623 WO2019137331A1 (en) | 2018-01-09 | 2019-01-07 | High temperature dry block temperature calibrator |
| EP19737990.2A EP3739312B1 (en) | 2018-01-09 | 2019-01-07 | High temperature dry block temperature calibrator |
| PCT/CN2019/070730 WO2019137343A1 (en) | 2018-01-09 | 2019-01-08 | Flow guiding and heat dissipating type dry block temperature calibrator |
| US16/961,014 US11740139B2 (en) | 2018-01-09 | 2019-01-08 | Flow guiding and heat dissipating type dry block temperature calibrator |
| EP19738531.3A EP3739314A4 (en) | 2018-01-09 | 2019-01-08 | Flow guiding and heat dissipating type dry block temperature calibrator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810018505.9A CN110017914B (en) | 2018-01-09 | 2018-01-09 | Flow-guiding heat-dissipating dry body temperature calibrator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110017914A CN110017914A (en) | 2019-07-16 |
| CN110017914B true CN110017914B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810018505.9A Active CN110017914B (en) | 2018-01-09 | 2018-01-09 | Flow-guiding heat-dissipating dry body temperature calibrator |
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| CN (1) | CN110017914B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111307337B (en) * | 2020-02-13 | 2021-04-13 | 中国科学院理化技术研究所 | Forced air circulation temperature calibration device |
| WO2021175291A1 (en) * | 2020-03-06 | 2021-09-10 | 北京康斯特仪表科技股份有限公司 | Temperature calibrator and method for cooling furnace core thereof |
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| Publication number | Publication date |
|---|---|
| CN110017914A (en) | 2019-07-16 |
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