CN2785007Y - Constant temperature box - Google Patents
Constant temperature box Download PDFInfo
- Publication number
- CN2785007Y CN2785007Y CN 200520050254 CN200520050254U CN2785007Y CN 2785007 Y CN2785007 Y CN 2785007Y CN 200520050254 CN200520050254 CN 200520050254 CN 200520050254 U CN200520050254 U CN 200520050254U CN 2785007 Y CN2785007 Y CN 2785007Y
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- CN
- China
- Prior art keywords
- constant temperature
- temperature
- cavity
- sap cavity
- heat transfer
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a constant temperature box which is composed of a box housing [1], a liquid cavity [3], a constant temperature cavity [2] and a heating device [13]. The utility model is characterized in that the constant temperature cavity [2] is arranged in the sealed liquid cavity [3]; a heat transfer medium in the liquid cavity [3] transfers heat to the constant temperature cavity [2] through the inner wall [15] of the box; the liquid cavity [3] is provided with a pressure sensing device [10] and a pressure regulating device [5]. By the principle that the boiling temperature of the heat transfer medium (water or other substances) in the liquid cavity [3] does not change under constant air pressure, the pneumatic feedback technology is adopted to control the boiling temperature of the heat transfer medium to make the temperature fluctuation range of the heat transfer medium small so that the temperature in the constant temperature cavity [2] is stabilized.
Description
Technical field
The utility model relates to temperature control equipment, particularly relates to constant temperature oven.
Background technology
The constant temperature oven of prior art generally adopts the interior electrothermal tube of case directly to heat, the electric fan air blast, and hot blast circulates up and down, and controls with the temperature-sensing probe thermometric.Germany Binder temperature control series of products, electrothermal tube are installed in the interior inner chamber of case, by the electric fan air blast, disperse heat at the uniform hot blast of formation in the inner chamber in casing.The problem that prior art exists is: temperature-controlled precision is poor; Temperature is subjected to the influence of voltage ripple of power network bigger: electrothermal tube has thermal inertia, and temp probe has hysteresis quality, and temperature control is difficult to temperature fluctuation synchronous.
The utility model content
Thereby the utility model aims to provide a kind of relatively stable comparatively stable constant temperature oven of constant temperature cavity temperature that makes of heat transfer medium temperature that makes.
The technical scheme that its technical matters that solves the utility model adopts is: constant temperature oven is made up of insulation can body case, sap cavity, constant temperature chamber, heating arrangement, and sap cavity is provided with pressure transducer, and the regulator that utilizes air pressure control boiling temperature is arranged.Sap cavity is airtight, and the constant temperature chamber is in sap cavity, and heat transfer medium conducts heat in the constant temperature chamber by cabinet wall in the sap cavity.Utilize heat transfer medium (water or other materials) constant principle of boiling temperature under constant air pressure in the sap cavity, control air pressure well by baroceptor and regulator, make the interior heat transfer medium of sap cavity be in fluidized state, thus the purpose of the temperature-resistant realization constant temperature of heat transfer medium.Pressure transducer can adopt the electron pressure table, also can adopt liquid column gauge or other modes.
Principle of work is made the heat transfer medium resistance wire with water, and to do heating source be the example explanation.Heating arrangement heats resistance wire, and the temperature of water raises, and produces a large amount of water vapours when reaching boiling point, and air pressure rises rapidly.Prescribe a time limit when the water tank internal pressure rises to going up of set pressure, control circuit starts solenoid valve, and water vapour is released, and pressure descends, and falls the following of setting when pressure and prescribes a time limit, and control circuit cuts out solenoid valve.Water vapour stops to release, along with water vapour produces, and pressure rises.This process moves in circles, and controls its stable gas pressure in the bound interval of setting, and the temperature that makes water fluctuates between corresponding two boiling points under spacing air pressure up and down.Be full of the water of boiling in the constant temperature oven sap cavity, conduct heat to the constant temperature chamber by cabinet wall, the temperature of constant temperature cavity temperature and heat transfer medium water equates when reaching balance.Pressure transducer and regulator are feature technologies of the present utility model, and pressure transducer adopts modes such as precision pressure gauge or fluid column meter to realize.
Sometimes need in the constant temperature chamber more to ventilate or emission gases, unaffected as far as possible in order to make temperature, draft tube can be circled round by sap cavity, so that it is basic identical to enter the original temperature of gas temperature and constant temperature chamber in constant temperature chamber.
Under the environment of some special requirement, the constant temperature chamber can be located at outside the casing, by insulation dispatch tube and pump heating medium is connected with the constant temperature chamber and realizes heating and temperature control.
The utility model adopts the boiling temperature of air pressure feedback technique control heat transfer medium, makes the temperature fluctuation range of heat transfer medium little, and the temperature difference reduces greatly in the constant temperature chamber thereby make, and has overcome shortcomings such as prior art temperature control precision difference effectively.The temperature difference preferably also can only be positive and negative 0.3 ℃ generally positive and negative more than 1 ℃ in the prior art constant temperature chamber, and the temperature difference of the present utility model is less than positive and negative 0.1 ℃.
Description of drawings
Fig. 1 is located at the interior structural drawing of casing for utility model constant temperature chamber, and Fig. 2 is located at the outer structural drawing of casing for utility model constant temperature chamber.Among the figure: 1-cabinet shell, 2-constant temperature chamber, 3-sap cavity, the 4-air-out apparatus, 5-regulator, 6-fan, 7-heat transfer medium temperature sensor, 8-water inlet, 9-sap cavity liquid level display device, the 10-pressure transducer, 11-constant temperature cavity temperature sensor, 12-water delivering orifice, the 13-heating arrangement, 14-draft tube, 15-cabinet wall, 16-split sap cavity, 17-split sap cavity temperature sensor, 18-pump
Embodiment
Below in conjunction with description of drawings embodiment.
Embodiment one: the disjunctor constant temperature oven of constant temperature chamber in establishing casing.
As shown in Figure 1, the casing part mainly is made up of cabinet shell (1), constant temperature chamber (2), sap cavity (3), heating arrangement (13), pressure transducer (10), water inlet (8) water delivering orifice (12), draft tube (14), air-out apparatus (4) etc.Cabinet shell (1) has thermofin, is made by insulation material, and cabinet wall (15) is made for the good conductor material of heat.Sap cavity (3) is airtight, and in sap cavity (3), the interior heat transfer medium of sap cavity (3) conducts heat in constant temperature chamber (2) by cabinet wall (15) constant temperature chamber (2).Constant temperature chamber (2) is the constant temperature space that constant temperature oven will offer the user.Heating arrangement (13) is provided with heat transfer medium temperature sensor (7) for heating medium (water or other materials) provides heat energy in the sap cavity (3).When water reaches boiling point, by frequency conversion or regulation voltage or reinstate modes such as small power electric heat pipe power is descended, make water just maintain fluidized state.
Pressure transducer (10) shows sap cavity (3) internal pressure, and regulator (5) is by computer or artificial real-time regulated sap cavity (3) internal gas pressure value.When pressure is bigger than normal, start pressure-releasing electromagnetic valve; When pressure is less than normal, close pressure-releasing electromagnetic valve.Use computer can also manifest sap cavity (3) temperature and constant temperature chamber (2) temperature in real time, and sap cavity (3) temperature sampling is preserved, draw sap cavity (3) temperature curve, make things convenient for customer analysis.When water temperature reaches boiling point, close heating tube, simultaneously according to the air pressure change situation, the variable frequency adjustment heating tube.In order to make the interior air themperature in constant temperature chamber (2) more even, can be provided with fan (6).For the ease of observing the interior liquid level of sap cavity (3), can outside casing, be provided with sap cavity liquid level display device (9).
High-temperature water vapor by regulator (5) pressure-releasing electromagnetic valve is emitted becomes water by condensing unit, flows back to sap cavity (3) by the road, to keep the interior water level of sap cavity (3) constant substantially.
Embodiment two: the constant temperature chamber is located at the outer split type constant temperature oven of casing.
As shown in Figure 2, separate with casing (1) in constant temperature of the present utility model chamber (2), connects the heat transfer that refluxes, realization constant temperature chamber (3) constant temperature by insulation heat-transfer pipe and pump (18) with split sap cavity (16) with the heat transfer medium outlet box is external.(2) are provided with split sap cavity temperature sensor (17) outside the constant temperature chamber.All the other construction and devices and embodiment one are roughly the same.
In the utility model, what the pressure transducer among the embodiment one (10) adopted is electron pressure table (as shown in fig. 1), and the pressure transducer among the embodiment two (10) adopts liquid column gauge (as shown in Figure 2).Liquid column gauge is provided with the spacing written instructions of pressure (see up and down arrow), and according to the next on the set pressure scope set pressure, fluid column fluctuates in can only be between the pressure spacing zone.
Claims (2)
1. a constant temperature oven is made up of cabinet shell (1), sap cavity (3), constant temperature chamber (2), heating arrangement (13), and feature of the present utility model is: constant temperature chamber (2) are in airtight sap cavity (3); Sap cavity (3) is provided with pressure transducer (10), and the regulator (5) that utilizes air pressure control boiling temperature is arranged.
2. constant temperature oven according to claim 1 is characterized in that draft tube (14) circles round by in the sap cavity (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050254 CN2785007Y (en) | 2005-02-04 | 2005-02-04 | Constant temperature box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520050254 CN2785007Y (en) | 2005-02-04 | 2005-02-04 | Constant temperature box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2785007Y true CN2785007Y (en) | 2006-05-31 |
Family
ID=36771975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520050254 Expired - Fee Related CN2785007Y (en) | 2005-02-04 | 2005-02-04 | Constant temperature box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2785007Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106547290A (en) * | 2015-09-16 | 2017-03-29 | 德阳市科瑞仪器设备厂 | A kind of gas constant-flow constant temperature system |
| CN106951010A (en) * | 2017-04-28 | 2017-07-14 | 沈阳航空航天大学 | It is a kind of can continuous alternating temperature constant temperature system and constant temperature method |
-
2005
- 2005-02-04 CN CN 200520050254 patent/CN2785007Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106547290A (en) * | 2015-09-16 | 2017-03-29 | 德阳市科瑞仪器设备厂 | A kind of gas constant-flow constant temperature system |
| CN106951010A (en) * | 2017-04-28 | 2017-07-14 | 沈阳航空航天大学 | It is a kind of can continuous alternating temperature constant temperature system and constant temperature method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |