CN114964564A - Pipeline type self-circulation air medium constant temperature bath - Google Patents
Pipeline type self-circulation air medium constant temperature bath Download PDFInfo
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- CN114964564A CN114964564A CN202210838568.5A CN202210838568A CN114964564A CN 114964564 A CN114964564 A CN 114964564A CN 202210838568 A CN202210838568 A CN 202210838568A CN 114964564 A CN114964564 A CN 114964564A
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- annular pipeline
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- 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
- G01K15/002—Calibrated temperature sources, temperature standards therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01L—CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE
- B01L7/00—Heating or cooling apparatus; Heat insulating devices
- B01L7/02—Water baths; Sand baths; Air baths
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- General Physics & Mathematics (AREA)
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
Abstract
The invention discloses a pipeline type self-circulation air medium thermostatic bath, which comprises: a housing; the annular pipeline is arranged in the shell, and a test cavity opening for placing a test object is formed in the annular pipeline; a plug for sealing the test chamber opening; the heat insulation layer is filled between the inner wall of the shell and the annular pipeline; a temperature regulating box; an air deflector; the circulating fan is used for driving air in the annular pipeline to circularly flow; and the temperature sensor is arranged inside the annular pipeline. The pipeline type self-circulation air medium thermostatic bath has better stability.
Description
Technical Field
The embodiment of the invention relates to the field of metering, in particular to a pipeline type self-circulation air medium constant temperature tank.
Background
The liquid constant temperature bath is a matched device for detecting or calibrating a contact temperature measuring instrument, provides a constant temperature field with stable and uniform temperature, a detected thermometer and a standard thermometer are placed in the liquid constant temperature bath together, the temperature of the liquid constant temperature bath is measured at the same time, and the measurement error of the detected thermometer is obtained by comparing the measurement results of the detected thermometer and the standard thermometer. However, the liquid thermostatic bath needs to use liquid as a thermostatic medium, and is usually liquid such as alcohol, water, antifreeze, edible oil, silicone oil, cylinder oil, etc., but the use of liquid medium has the following disadvantages: 1) a large amount of oil smoke is generated at high temperature, air draft is needed to be carried out, and flowing air flow is generated during air draft to influence verification or calibration; 2) at low temperature, condensed water is generated at the position of the test cavity opening and mixed into alcohol (or antifreeze) to cause influence; 3) the expansion with heat and contraction with cold of the liquid is inconvenient to use, and the liquid needs to be supplemented from time to time; 4) the thermometer to be tested and the standard thermometer need to be cleaned after being immersed in high-temperature oil or low-temperature oil.
In the prior art, in order to overcome the disadvantages of the liquid constant temperature medium, a cylindrical air medium high temperature constant temperature tank as shown in fig. 1 is designed, which comprises a shell 1, a heat preservation layer 2, an inner container 3, an upper cover plate 4, a heat preservation cover plate 5, a porous temperature equalization 6, a temperature sensor 7, a cylindrical air guide 8, a heater 9, a centrifugal fan blade 10, a motor 11, a temperature controller 12, a small through hole 16 for placing a standard thermometer 13 and a thermometer 14 to be detected, and an annular air guide ring 15. However, the inventor found that the cylindrical air medium high temperature constant temperature bath, although solving various disadvantages of the liquid constant temperature bath, has a technical stability index which is more than an order of magnitude lower than that of the liquid constant temperature bath.
Disclosure of Invention
The embodiment of the invention provides a pipeline type self-circulation air medium thermostatic bath, which is used for solving the problem of poor stability of the existing cylindrical air medium high-temperature thermostatic bath.
In order to solve the above technical problem, an embodiment of the present invention provides a ducted self-circulation air medium thermostatic bath, including: a housing; the annular pipeline is arranged in the shell, a test cavity opening for placing a test object is formed in the annular pipeline, the annular pipeline comprises an upper horizontal straight section of the annular pipeline, a lower horizontal straight section of the annular pipeline, a left vertical section of the annular pipeline and a right vertical section of the annular pipeline, and a first opening is formed in the upper horizontal straight section of the annular pipeline, which is close to the upper end of the right vertical section of the annular pipeline; a plug for sealing the test chamber opening; the heat insulation layer is filled between the inner wall of the shell and the annular pipeline; the temperature adjusting box is communicated with the opening and comprises a temperature adjusting box shell, a heater and a refrigerator, wherein the heater and the refrigerator are positioned in the temperature adjusting box shell, and a second opening is formed in the upper end of the temperature adjusting box shell; one end of the air deflector extends into the first opening and is connected with the horizontal straight section on the annular pipeline, the other end of the air deflector penetrates through the second opening and extends into the temperature regulating box shell, the part of the air deflector, which is positioned in the temperature regulating box shell, is arranged between the heater and the refrigerator, and the air deflector is used for guiding air flowing on the horizontal straight section on the annular pipeline to flow through the heater and the refrigerator; the circulating fan is used for driving air in the annular pipeline to circularly flow, an air inlet of the circulating fan is communicated with the upper part of the right side of the adjusting box shell, and an air outlet of the circulating fan is communicated with the upper end of the right vertical section of the annular pipeline; and the temperature sensor is arranged inside the annular pipeline.
Optionally, the test chamber opening opens at the top of the vertical section at the left side of the annular duct.
Optionally, the plug is a soft plug.
Optionally, the soft rubber plug is provided with a through hole for placing a standard thermometer and a thermometer to be detected.
Optionally, the duct type self-circulation air medium thermostatic bath further includes a power distribution cabinet disposed inside the housing, a motor of the circulation fan is installed in the power distribution cabinet, and the power distribution cabinet is configured to supply power to the heater, the refrigerator, the motor of the circulation fan, and the temperature sensor.
Optionally, the ducted self-circulating air media thermostatic bath further comprises a temperature controller, the temperature controller being installed within the power distribution cabinet.
Optionally, the heater is a heating pipe and the refrigerator is a cooling pipe.
Optionally, a gap region between the annular pipeline and the temperature adjusting box is filled with a heat insulating material.
Optionally, the insulating layer is made of insulating cotton.
Optionally, the annular pipe is made of stainless steel.
The invention adopts air as a constant temperature medium, and utilizes the heater and the refrigerator which are arranged in front of the circulating fan to heat and refrigerate the air in the annular pipeline simultaneously, thereby keeping the air at a stable temperature, and simultaneously, the circulating fan drives the air to circularly flow in the annular pipeline, thereby keeping the air temperature in the annular pipeline uniform. Compared with the common liquid thermostatic bath, the pipeline type self-circulation air medium thermostatic bath has the technical performance close to or reaching the level of the liquid thermostatic bath. The pipeline type self-circulation air medium thermostatic bath provided by the invention achieves the technical indexes given by JJF1030-2010 thermostatic bath technical performance test specifications to the liquid thermostatic bath. The temperature stability reaches +/-0.01-0.02 ℃ in the temperature range of-80-300 ℃, and the horizontal or vertical temperature uniformity is 0.01-0.2 ℃, which is far better than that of a cylindrical air medium high-temperature constant-temperature tank in the temperature range of room temperature plus 25-300 ℃, the temperature stability is +/-0.05 ℃, and the horizontal temperature uniformity is 0.08-0.52 ℃.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the principles of the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a cylindrical air-medium high-temperature thermostat of the prior art;
FIG. 2 is a schematic structural diagram of a ducted self-circulating air media thermostat in an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the descriptions relating to "first", "second", etc. in the embodiments of the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between the various embodiments can be combined with each other, but must be based on the realization of the technical solutions by those skilled in the art, and when the technical solutions are contradictory or can not be realized, the combination of the technical solutions should be considered to be absent, and the technical solutions are not within the protection scope of the present invention.
As shown in fig. 2, an embodiment of the present invention provides a ducted self-circulating air media thermostatic bath, including: the device comprises a shell 20, an annular pipeline 21, a heat preservation layer 22, a temperature adjusting box 23, an air deflector 24, a circulating fan 25, a temperature sensor 26 and a plug 27.
In an embodiment of the present invention, the housing 20 may be made of a material resistant to high temperatures.
The toroidal tube 21 is disposed inside the housing 20, and the toroidal tube 21 includes an upper toroidal tube horizontal section 210, a lower toroidal tube horizontal section 211, a left toroidal tube vertical section 212, and a right toroidal tube vertical section 213. In this embodiment, the annular pipe 21 may be made of stainless steel.
The annular pipeline 21 is provided with a test cavity for placing a test object, and the test cavity can be sealed by a plug 27. In this embodiment, the test object may include a standard thermometer and a thermometer to be tested. The standard thermometer is a thermometer with accurate temperature measurement, and the thermometer to be detected is a thermometer to be calibrated for measuring errors. In one embodiment, the test object may also be some other product that needs to be tested at a stable temperature.
In an exemplary embodiment, the plug 27 is preferably a soft rubber plug. The soft rubber plug can be made of high-temperature resistant materials.
In an exemplary embodiment, in order to facilitate calibration of the thermometer, the flexible rubber plug is provided with through holes for placing a standard thermometer 28 and a thermometer 29 to be tested.
In an exemplary embodiment, to facilitate calibration of the thermometer, a test chamber port opens at the top of the left vertical section 212 of the annular duct.
In one embodiment, the upper horizontal segment 210, the lower horizontal segment 211, the left vertical segment 212 and the right vertical segment 213 of the circular duct can be integrally formed into the circular duct 21. In another embodiment, the left end of the upper horizontal straight section 210 of the circular pipe may be connected to the upper end of the left vertical section 212 of the circular pipe by welding, the right end of the upper horizontal straight section 210 of the circular pipe may be connected to the upper end of the right vertical section 213 of the circular pipe by welding, the lower end of the left vertical section 212 of the circular pipe may be connected to the left end of the lower horizontal straight section 211 of the circular pipe by welding, and the right end of the lower horizontal straight section 211 of the circular pipe may be connected to the lower end of the right vertical section 213 of the circular pipe by welding. By the above connection, the annular duct 21 is formed. In this embodiment, the upper horizontal section 210 of the circular duct is provided with a first opening 214 near the upper end of the right vertical section 213 of the circular duct.
The insulating layer 22 is filled between the inner wall of the shell and the annular pipeline. The insulating layer 22 may be made of insulating cotton.
A temperature adjusting box 23 for adjusting the temperature of the air in the circular duct 21 to a stable preset temperature. For example, if the preset temperature is 20 degrees, the temperature adjusting box 23 can adjust the temperature of the air to about 20 degrees, and the error of the adjusted temperature can be controlled to be +/-0.01-0.02 degrees. In the present embodiment, the temperature regulation box 23 communicates with the opening 214. In the present embodiment, the temperature regulation cassette 23 includes a temperature regulation cassette housing 231, a heater 232 and a refrigerator 233 provided inside the temperature regulation cassette housing 231. The upper end of the cartridge case 231 has a second opening. The second opening of the temperature adjustment box 23 is matched in shape and size with the first opening 214, so that after the second opening of the temperature adjustment box 23 is welded with the first opening 214, the temperature adjustment box 23 can be completely communicated with the upper horizontal straight section 210 of the annular pipeline, and no gap exists. In the present embodiment, the heater 232 is used for heating air, and the refrigerator 233 is used for cooling air. The heater 232 may be installed at a left side position inside the temperature adjusting cassette housing 231, and the refrigerator 233 is installed at a right side position inside the temperature adjusting cassette housing 231. The heater 232 is preferably a heating tube and the refrigerator is preferably a cooling tube.
The air deflector 24 guides the air flowing through the horizontal straight section 210 on the annular duct to flow through the heater 232 and the refrigerator 233 through the air deflector 24, and then flows into the air inlet of the circulating fan 25. In this embodiment, one end of the air guiding plate 24 extends into the first opening 214 and is connected to the upper horizontal section 210 of the circular duct, the other end of the air guiding plate 24 extends into the interior of the temperature regulating box casing 231 through the second opening, and the portion of the air guiding plate 24 located inside the temperature regulating box casing 231 is disposed between the heater 232 and the refrigerator 233 so as to separate the heater 232 and the refrigerator 233. In this embodiment, one end of the air deflector 24 and the upper horizontal section 210 of the annular duct may be connected to the inner wall thereof by welding. The width of the air deflector 24 is the same as the width of the cross section of the upper horizontal straight section 210 of the annular pipeline, and the shape of the air deflector 24 is matched with the shape of the cross section of the upper horizontal straight section 210 of the annular pipeline, so that after one end of the air deflector 24 is welded and connected with the upper horizontal straight section 210 of the annular pipeline, the air deflector 24 completely separates the left part and the right part of the upper horizontal straight section 210 of the annular pipeline, which are positioned on the air deflector 24, so that the air can be guided by the air deflector 24 to flow through the heater 232 and the refrigerator 233 after flowing through the air deflector 24.
And a circulating fan 25 for driving air to circulate in the annular duct 21. In this embodiment, the air inlet of the circulation fan 25 communicates with the upper right portion of the conditioning case 231, and the air outlet of the circulation fan 25 communicates with the upper end of the right vertical section 213 of the ring duct.
And a temperature sensor 26 disposed inside the loop pipe 21 for measuring the temperature inside the loop pipe 21 in real time and feeding back the measured temperature to the temperature controller 32, so that the temperature controller 32 can adjust the heating amount of the heater 232 and the cooling amount of the refrigerator 233 in the temperature adjusting box 23 according to the fed-back temperature and the temperature set by the user, thereby stably maintaining the temperature inside the loop pipe 21 at the temperature set by the user. The temperature sensor 26 is preferably disposed in the right vertical section 213 of the toroidal tube.
In an exemplary embodiment, the ducted self-circulating air media thermostatic bath further includes a power distribution cabinet 30 disposed inside the housing 20, the motor 31 of the circulating fan 25 is installed in the power distribution cabinet 30, and the power distribution cabinet 30 is used for supplying power to the heater 232, the refrigerator 233, the motor 31 of the circulating fan 25, and the temperature sensor 26.
In an exemplary embodiment, the ducted self-circulating air media thermostatic bath further comprises a temperature controller 32, and the temperature controller 32 may be installed within the power distribution cabinet. The temperature controller is used for a user to set the temperature inside the loop duct 21, and for adjusting the heating amount of the heater 232 and the cooling amount of the refrigerator 233 in the temperature adjusting box 23, so that the inside temperature of the loop duct 21 is stably maintained at the user-set temperature.
In an exemplary embodiment, the gap area 33 between the ring conduit 21 and the temperature regulating box 23 is filled with a thermal insulation material, which may be thermal insulation cotton.
The working principle of the pipeline type self-circulation air medium thermostatic bath in the embodiment is as follows:
the circulating fan 25 drives the air in the circular pipeline 21 to circularly flow, when the air flows from the upper horizontal straight section 210 of the circular pipeline to the air deflector 24, the air deflector 24 guides the air, so that the air flows into the temperature adjusting box 23 from the upper horizontal straight section 210 of the circular pipeline, and is heated and cooled by the heater 232 and the refrigerator 233 in the temperature adjusting box 23 in sequence, so that the air is adjusted to be air with stable temperature, and then the air flows into the air inlet of the circulating fan 25, and then flows to the right vertical section 213 of the circular pipeline, the lower horizontal straight section 211 of the circular pipeline, and finally reaches the left vertical section 212 of the circular pipeline in sequence under the driving of the circulating fan 25, wherein the middle area 34 of the left vertical section 212 of the circular pipeline is used as a constant temperature area for equipment calibration.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that various changes, modifications and substitutions can be made without departing from the spirit and scope of the invention as defined by the appended claims. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A ducted self-circulating air media thermostatic bath, comprising:
a housing;
the annular pipeline is arranged in the shell, a test cavity opening for placing a test object is formed in the annular pipeline, the annular pipeline comprises an upper horizontal straight section of the annular pipeline, a lower horizontal straight section of the annular pipeline, a left vertical section of the annular pipeline and a right vertical section of the annular pipeline, and a first opening is formed in the upper horizontal straight section of the annular pipeline, which is close to the upper end of the right vertical section of the annular pipeline;
a plug for sealing the test chamber opening;
the heat insulation layer is filled between the inner wall of the shell and the annular pipeline;
the temperature adjusting box is communicated with the opening and comprises a temperature adjusting box shell, a heater and a refrigerator, wherein the heater and the refrigerator are positioned in the temperature adjusting box shell;
one end of the air deflector extends into the first opening and is connected with the horizontal straight section on the annular pipeline, the other end of the air deflector penetrates through the second opening and extends into the temperature regulating box shell, the part of the air deflector, which is positioned in the temperature regulating box shell, is arranged between the heater and the refrigerator, and the air deflector is used for guiding air flowing on the horizontal straight section on the annular pipeline to flow through the heater and the refrigerator;
the circulating fan is used for driving air in the annular pipeline to circularly flow, an air inlet of the circulating fan is communicated with the upper part of the right side of the adjusting box shell, and an air outlet of the circulating fan is communicated with the upper end of the right vertical section of the annular pipeline;
and the temperature sensor is arranged inside the annular pipeline.
2. The ducted self-circulating air media thermostatic bath according to claim 1, wherein the test chamber port opens at the top of the left vertical section of the circular duct.
3. The ducted self-circulating air media thermostatic bath according to claim 2, wherein the plug is a soft rubber plug.
4. The ducted self-circulating air media thermostatic bath according to claim 3, wherein the soft rubber plug is provided with a through hole for placing a standard thermometer and a thermometer to be tested.
5. The ducted self-circulating air media thermostatic bath according to claim 1, further comprising a power distribution cabinet disposed inside the housing, wherein a motor of the circulating fan is installed in the power distribution cabinet, and the power distribution cabinet is configured to supply power to the heater, the refrigerator, the motor of the circulating fan, and the temperature sensor.
6. The ducted self-circulating air media thermostatic bath of claim 5, further comprising a temperature controller installed within the electrical power distribution cabinet.
7. The ducted self-circulating air media thermostatic bath according to any one of claims 1 to 5, wherein the heater is a heating pipe and the refrigerator is a cooling pipe.
8. The ducted self-circulating air media thermostatic bath according to claim 1, wherein a gap region between the ring-shaped duct and the temperature regulating box is filled with a thermal insulating material.
9. The ducted self-circulating air media thermostatic bath according to claim 1, wherein the insulating layer is made of insulating cotton.
10. The ducted self-circulating air media thermostatic bath according to claim 1, wherein the annular duct is made of stainless steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838568.5A CN114964564A (en) | 2022-07-15 | 2022-07-15 | Pipeline type self-circulation air medium constant temperature bath |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210838568.5A CN114964564A (en) | 2022-07-15 | 2022-07-15 | Pipeline type self-circulation air medium constant temperature bath |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114964564A true CN114964564A (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210838568.5A Pending CN114964564A (en) | 2022-07-15 | 2022-07-15 | Pipeline type self-circulation air medium constant temperature bath |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114964564A (en) |
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2022
- 2022-07-15 CN CN202210838568.5A patent/CN114964564A/en active Pending
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